JP2010142521A - Lift mechanism for vertically moving vertical table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably stop a vertical table at an optimal height by adjusting the height of the vertical table with a simple structure. <P>SOLUTION: A slide table 5 is connected to a vertically extending strut 1 so as to vertically move on the strut 1, and the vertical table 2 is connected to the slide table 5 so as to be tilted from a horizontal attitude to a folded attitude. The strut 1 has a slit 8 extending vertically, and the slide table 5 is connected to the strut 1 so as to vertically move along the slit 8. A lift mechanism is provided with a stopper mechanism 30 for stopping the slide table 5 at a prescribed vertical position of the strut 1 when the vertical table 2 is in the horizontal attitude. An insertion piece 16 to be inserted in the slit 8 is provided to the vertical table 2 or the slide table 5 when the vertical table 2 is tilted in the horizontal attitude. The insertion piece 16 is inserted in the slit 8 when the vertical table 2 is in the horizontal attitude and, with the insertion piece 16 and the slit 8, rolling of the vertical table 2 in the horizontal attitude is prevented. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an up-and-down mechanism that can move an up-and-down base up and down and stop at a predetermined height. In particular, the present invention relates to an up-and-down mechanism that can stably hold the upper and lower bases in a horizontal posture while the upper and lower bases are stopped at a predetermined height.

  Chairs that can move up and down the pedestal can be used in an optimal state for various applications. The chair that realizes this has a structure in which the seat can be moved up and down in various structures and stopped at the moved position. A chair has been developed that can freely move the seat up and down (see Patent Documents 1 and 2). The chairs described in these publications connect the seat to the support via a stopper mechanism. These chairs stop the seat at a predetermined position by a stopper mechanism, and also release the stopper mechanism so that the seat can be moved up and down.

  These chairs can move the seat up and down by operating the handle to unlock the stopper mechanism. However, this chair has a complicated stopper mechanism for stopping the pedestal at a predetermined position, which increases the manufacturing cost. Moreover, since a complicated stopper mechanism is provided, the whole cannot be made a clean and beautiful design. Furthermore, since it is necessary to operate the handle in order to release the locked state, there is a drawback that it cannot be easily moved up and down. In particular, it is difficult to move the pedestal up and down with one hand.

The present inventor has developed a chair shown in FIGS. 1 to 3 for the purpose of solving the above drawbacks (see Patent Document 3). The chairs shown in these drawings include a support column 91 that is self-supporting in a posture inclined upwardly toward the rear, and a seat base 92 that is connected to the support column 91 so as to move up and down via a connector 94. Is provided. The support column 91 is cylindrical and extends vertically, and is provided with a slit 98 on the front surface. The connecting tool 94 is connected to the slide base 95 that connects the seat base 92, and is connected to the slide base 95, passes through the slit 98 of the support column 91, and contacts the inner surface of the support column 91 on both sides of the slit 98. A stopper 96 and an outer stopper 97 connected to the slide base 95 and abutting on both sides of the slit 98 on the front surface of the support column 91 are provided. The outer stopper 97 is positioned below the inner stopper 96 and is connected to the slide table 95. The distance (d) between the inner stopper 96 and the outer stopper 97 is larger than the wall thickness (t) of the column 91 so that the slide table 95 can be moved up and down along the column 91. When a load is applied to the seat 92, the inner stopper 96 is pressed against the inner surface of the column 91 and the outer stopper 97 is pressed against the front surface of the column 91 to prevent the chair 92 from being lowered. Now you can stop.
Japanese Utility Model Publication No.59-27170 Japanese Utility Model Publication No.59-27171 JP 2002-282084 A

  The chair shown in FIGS. 1 to 3 can be conveniently used by moving the seat 92 up and down and fixing it at an optimum height. However, this chair cannot prevent the seat 92 from rolling in the direction indicated by the arrow A in FIG. This is because the inner stopper 96 that contacts the inner surface of the support column 91 is positioned on the support column 91 through the slide table 95 and the slit 98 in a state where the seat 92 is in the horizontal posture, whereas the inner stopper 96 is more This is because the outer stopper 97 positioned below is not positioned by being connected to the support column 91 in a state of being in contact with both sides of the slit 98 on the front surface of the support column 91. That is, the inner stopper 96 is connected to the support column 91 while being positioned by the slit 98, but the connection position of the outer stopper 97 with the support column 91 is not specified. Therefore, the slide base 95 to which the base 92 is connected is in a connection state in which the slide base 95 is positioned at one point with respect to the support column 91, and both end portions of the base 92 are prevented from swinging up and down around this positioning portion. Can not. In particular, this roll increases as the pedestal increases. As described above, the seat that rolls in the horizontal posture cannot be used comfortably and safely by the user because the seat swings while the user is sitting.

  The present invention has been developed for the purpose of solving this drawback. An important object of the present invention is to make it possible to adjust the height of the upper and lower bases quickly and easily to an optimum height while having an extremely simple structure, and to stop at a predetermined height. Another object of the present invention is to provide an up-and-down mechanism that can move the up-and-down table up and down that can be stably held in a horizontal posture while preventing the up-and-down table from rolling.

Means for Solving the Problems and Effects of the Invention

The up-and-down mechanism capable of moving the up-and-down base of claim 1 of the present invention up and down is a support column 1 extending up and down, a slide table 5 connected to the support column 1 so as to move up and down, and rotating to the slide table 5 An upper and lower platform 2 connected so as to be tilted from a horizontal posture to a folded posture via a shaft 4 is provided. The support column 1 has a slit 8 extending in the vertical direction, and is connected to the support column 1 so that the slide table 5 can move up and down along the slit 8. Further, the vertical mechanism includes a stopper mechanism 30 that can stop the slide base 5 at a predetermined vertical position of the column 1 in a state where the vertical base 2 is in a horizontal posture. Further, the vertical mechanism includes an insertion piece 16 that is inserted into the slit 8 of the support column 1 in a horizontal posture while the vertical base 2 is connected to the slide base 5 so as to be tiltable. In the vertical mechanism, the insertion piece 16 is inserted into the slit 8 of the column 1, and the horizontal movement of the vertical base 2 is prevented by the insertion piece 16 and the slit 8.
In this specification, “the horizontal roll of the vertical platform in the horizontal posture” means a state in which the left and right sides of the horizontal platform in the horizontal posture swing up and down in opposite directions like a seesaw (arrow A in FIG. 1). Reference).

  The above-described vertical mechanism moves the slide base up and down along the slit of the support column, and freely changes the height of the top and bottom base, while the top and bottom base is in a horizontal position, the insertion piece provided on the top and bottom base However, since it is inserted into the slit of the support column, it is possible to reliably prevent the roll of the upper and lower bases in a horizontal posture while having an extremely simple structure. This up-and-down mechanism connects the up-and-down base that moves up and down to the support column while positioning both the slide base inserted through the slit and the insertion piece inserted into the slit. In other words, the upper and lower bases in the horizontal posture are connected to the support column while positioning at two points of the slide base and the insertion piece, so that both sides of the upper and lower bases are reliably prevented from swinging with respect to the support post, and the horizontal posture is set. It can prevent a certain vertical platform from rolling.

  Furthermore, the above vertical mechanism allows the insertion piece to be easily pulled out from the slit by tilting the vertical base from the horizontal position in the folding direction. It is possible to adjust the height of the upper and lower bases quickly and easily, and to stop at an optimum height reliably.

  The up-and-down mechanism capable of moving up and down the upper and lower bases according to claim 2 of the present invention includes a support column 1 that extends vertically, a slide table 5 that is connected to the support column 1 so as to be able to move up and down, and a rotation to the slide table 5. An upper and lower platform 2 connected so as to be tilted from a horizontal posture to a folded posture via a shaft 4 is provided. The support column 1 has a slit 8 extending in the vertical direction, and is connected to the support column 1 so that the slide table 5 can move up and down along the slit 8. Further, the vertical mechanism includes a stopper mechanism 30 that can stop the slide base 5 at a predetermined vertical position of the column 1 in a state where the vertical base 2 is in a horizontal posture. Further, the vertical mechanism connects the vertical base 2 to the slide base 5 so as to be tilted, and the slide base 5 is inserted into the slit 8 of the column 1 in conjunction with the vertical base 2 tilted in a horizontal posture. An insertion piece 16 is provided. In the vertical mechanism, the insertion piece 16 is inserted into the slit 8 of the column 1, and the horizontal movement of the vertical base 2 is prevented by the insertion piece 16 and the slit 8.

  The above-mentioned vertical mechanism moves the slide base up and down along the slit of the support column and freely changes the height of the vertical base, while the top and bottom bases are in a horizontal position, the insertion piece provided on the slide base However, since it is inserted into the slit of the column in conjunction with the upper and lower base tilted in the horizontal posture, the horizontal shaking of the upper and lower base in the horizontal posture can be surely prevented. This vertical mechanism connects the slide base connected to the column so that it can move up and down along the slit while positioning it with the insertion piece inserted into the slit, so that the slide base is positioned at two points. By connecting to the support column, it is possible to prevent the slide base from swinging with respect to the support column, and it is possible to reliably prevent the both sides of the upper and lower bases connected to the slide base from swinging with respect to the support column.

  In the vertical mechanism according to the third aspect of the present invention, the stopper mechanism 30 is connected to the slide base 5, and is connected to the inner stopper portion 5a that contacts the inner surface of the support column 1 on both sides of the slit 8, and to the inner stopper portion 5a. And a connecting portion 5b protruding from the slit 8 to the outside of the column 1 and a connecting hole 5x provided in the connecting portion 5b, and the upper and lower bases 2 are connected to the slide base 5 so that they can be tilted. A shaft 4 and a cam 7 connected to the upper and lower base 2 and positioned on both sides of the connecting portion 5b to press the outer surface of the column 1 in a state where the upper and lower base 2 is in a horizontal posture. In this vertical mechanism, the cam 7 presses the outer surface of the column 1 while the upper and lower platform 2 is rotated from the folded position to the horizontal position, and the column 1 is sandwiched between the cam 7 and the inner stopper portion 5a. Then, the slide table 5 is fixed at a fixed position of the support column 1.

  In the above-described vertical mechanism, the slide base is fixed relative to the support column by pressing the outer surface of the support column with a cam while the upper and lower table is rotated in a horizontal posture. It is possible to prevent the movement of the upper and lower bases in a horizontal posture more reliably by preventing the movement. In particular, the vertical mechanism has a feature that the slide base is fixed to the support column even when no load is applied to the base, so that the base does not slide down and can be used safely and safely.

  In the vertical mechanism according to a fourth aspect of the present invention, the pressing plate 6 that presses the outer surface of the support column 1 is connected to the slide base 5 via the rotating shaft 4. The pressing plate 6 is rotatably connected to the rotating shaft 4, and the cam 7 presses the outer surface of the support column 1 through the pressing plate 6 in a state where the upper and lower bases 2 are in a horizontal posture.

  In the up-and-down mechanism having this structure, since the cam does not directly press the outer surface of the support column, the slide base can be fixed without damaging the outer surface of the support column with the rotating cam. Further, since the pressing force of the cam is applied to the outer surface of the support via the pressing plate, the outer surface of the support can be pressed with a large area of the pressing plate, and the slide table can be stably fixed at a predetermined height.

  The vertical mechanism according to claim 5 of the present invention is such that the stopper mechanism 30 is connected to the slide base 5, the inner stopper portion 5 a that contacts the inner surface of the support column 1 on both sides of the slit 8, and the slide base 5 or the vertical base 2. An outer stopper 15 is provided which is connected to abut the front surface of the column 1. The outer stopper 15 is disposed below the inner stopper portion 5a in a state where the upper and lower platforms 2 are in a horizontal posture. In this vertical mechanism, the upper stopper 2 is rotated from the folded position to the horizontal position, and the inner stopper portion 5a presses the inner surface of the column 1 while the load is applied to the upper and lower table 2, and the outer stopper 15 is fixed to the column. 1 is pressed to stop the slide table 5 at a predetermined height so as not to descend.

  The above vertical mechanism prevents the slide base from descending by pressing the inner surface of the support column with the inner stopper and pressing the front surface of the support column with the outer stopper while a load is applied to the upper and lower table rotated horizontally. It is possible to reliably stop at a predetermined height.

  In the vertical mechanism according to a sixth aspect of the present invention, the insertion piece 16 is tapered so that the lateral width decreases toward the tip. This vertical mechanism allows the insertion piece 16 to be smoothly inserted into the slit 8 while promptly guiding the thin tip portion to the slit 8 when the insertion piece 16 is inserted into the slit by tilting the upper and lower platform 2 in a horizontal posture. .

According to the vertical mechanism of claim 7 of the present invention, the insertion piece 16 is press-fitted into the slit 8 in a state in which the vertical table 2 is in a horizontal posture, and the horizontal movement of the vertical table 2 is prevented by the insertion piece 16 and the slit 8. is doing.
Since the insertion piece is press-fitted into the slit, the vertical mechanism reliably prevents the insertion piece inserted into the slit from moving relative to the support column, and further prevents the horizontal table from shaking. It can be surely prevented.

  The up-and-down mechanism according to claim 8 of the present invention is used as a mechanism for providing the seat portion 20 on the upper-and-lower platform 2 and moving the seat portion 20 up and down. This up-and-down mechanism is characterized in that it can be conveniently used as a chair that can adjust the height of the seat portion of the chair easily and easily, can surely stop at the optimum height, and move the seat portion up and down.

  Further, the vertical mechanism according to claim 9 is used for a mechanism in which a top plate 40 is provided on the top and bottom table 2 and the top plate 40 of the table or the display table is moved up and down. This vertical mechanism can be used conveniently as a table or display shelf that can adjust the height of the top and bottom platform with the top plate easily and easily to stop at the optimum height and move the top plate up and down. There are features.

  Further, the vertical mechanism of claim 10 is used as a mechanism in which a shelf plate 46 is provided on the upper and lower base 2 and the shelf, the display shelf, and the shelf plate 46 of the book stand are moved up and down. This vertical mechanism can easily and easily adjust the height of the upper and lower platform with the shelf board to ensure that it stops at the optimum height, and is convenient as a shelf, display shelf, and book stand that can move the top board up and down. There are features that can be used.

In the vertical mechanism according to an eleventh aspect of the present invention, the vertical base 2 fixes the support arm 9 to the lower surface of the seat portion 20 or the shelf plate 46. The support arm 9 includes a connecting portion 9A that protrudes in the vertical direction behind the upper and lower bases 2 in a state where the upper and lower bases 2 are in a horizontal posture. The rotating shaft 4 is connected to the upper end of the connecting portion 9A. The insertion piece 16 is provided at the lower end of the connecting portion 9A.
The vertical mechanism of this structure can hold the upper and lower bases stably in a horizontal position because the upper and lower bases are placed in a horizontal posture and the connecting part can be arranged along the pillars and the lower end of the connecting part can be supported by the pillars. it can.

  Embodiments of the present invention will be described below with reference to the drawings. However, the embodiment shown below exemplifies an up-and-down mechanism capable of moving up and down the base for embodying the technical idea of the present invention, and the present invention does not specify the up-and-down mechanism as the following structure. .

  Further, in this specification, in order to facilitate understanding of the scope of claims, numbers corresponding to the members shown in the examples are indicated in the “claims” and “means for solving problems” sections. It is added to the members. However, the members shown in the claims are not limited to the members in the embodiments.

  The vertical mechanism according to the present invention has a structure in which the vertical base can be moved up and down along a vertically extending support and can be reliably held at the stop position by stopping the vertical base at an arbitrary position. As this up-and-down mechanism, for example, a seat can be provided on the top and bottom and the chair can be moved up and down, or a table can be provided by providing a top plate on the top and bottom, or A top plate can be provided to serve as a display shelf.

  As an embodiment of the present invention, an up-and-down mechanism that uses an up-and-down base having a seat as a chair that can move up and down is shown in FIGS. The vertical mechanism shown in these drawings includes a support column 1 that is self-supporting in a vertically extending posture, a slide table 5 that is connected to the support column 1 so as to be movable up and down, and a rotary shaft 4 connected to the slide table 5. And an upper and lower platform 2 connected so as to be tilted from a horizontal posture to a folded posture.

  The support column 1 has a posture in which a support rod 3 is connected to the rear and supported by the support rod 3 so as to extend vertically. The support column 1 shown in the figure is supported by a support rod 3 at the rear and is self-supporting in a posture that is inclined upwardly toward the rear. The support rod 3 is connected to a holding bracket 17 fixed to the support column 1 so as to be rotatable via a pin 18 so that the support rod 3 can be folded in a direction parallel to the support column 1. A curved rod 11 extending to the left and right is fixed to the lower end of the column 1. The curved rod 11 is a metal pipe that is curved in a substantially semicircular shape, with both ends positioned downward and the middle positioned upward, with the middle coupled to the lower end of the column 1 and both ends projecting left and right of the column 1. The overall shape is an inverted Y shape. Further, a horizontal rod 12 is fixed to the lower end of the support rod 3 so as to protrude left and right. The curved rod 11 and the horizontal rod 12 prevent the column 1 from falling sideways. The support column 1 is self-supported by the support rod 3, the bending rod 11, and the horizontal rod 12 so as not to fall forward, backward, left and right. Furthermore, the vertical mechanism shown in the drawing is provided with rubber caps 13 at the lower end, which is both ends of the curved rod 11, and at both ends of the horizontal rod 12. In the posture in which the support rod 3 is opened and the column 1 is self-supported, the vertical mechanism is configured so that the curved rod 11 and the horizontal rod 12 are against the floor surface while protecting the floor surface from being damaged by the caps 13 provided at the four corners. To prevent slipping. Furthermore, the support | pillar 1 of the figure has the handle 10 in the upper end. The handle 10 shown in the figure is a circular annular loop, and the vertical mechanism can be carried with this.

  The support in the figure is configured to stand on its own in a vertically extending posture by the above structure. However, the vertical mechanism does not specify a structure that holds the column in a self-supporting posture. The vertical mechanism can be supported by various structures that can hold the column in a self-supporting posture extending vertically. Furthermore, the vertical mechanism described above is configured to stand on its own in a posture in which the column is inclined upwardly toward the rear. However, the column can also stand in a vertical position.

  The support column 1 is a single metal square tube, that is, a square pipe. This support column 1 is provided with a slit 8 on the front surface. The slit 8 moves the upper and lower bases 2 up and down, and extends in the vertical direction and is provided at the center of the front surface. The support column 1 which is a rectangular tube has a feature that prevents the rotation of the upper and lower platforms 2 in the horizontal plane and can be firmly connected to the support column 1. However, the column can also be a cylinder or an elliptic cylinder. Cylindrical or oval cylindrical struts can also be structured to prevent rotation in a horizontal plane at the upper and lower platforms at a practical level.

  The slide table 5 is connected to the column 1 so that it can move up and down along the slit 8 provided in the column 1. The slide table 5 is stopped at a predetermined position of the support column 1 via the stopper mechanism 30 in a state where the upper and lower tables 2 are in a horizontal posture.

  The stopper mechanism 30 is connected to the slide base 5 as shown in FIGS. 7 to 9, and is connected to the inner stopper portion 5a that contacts the inner surface of the column 1 on both sides of the slit 8, and to the inner stopper portion 5a. A rotating shaft that is inserted into a connecting portion 5b that protrudes from the slit 8 to the outside of the support column 1 and a connecting hole 5x provided in the connecting portion 5b so that the upper and lower bases 2 can be tilted to the slide base 5. 4 and a cam 7 that is connected to the upper and lower base 2 and is positioned on both sides of the connecting portion 5b and presses the outer surface of the support column 1 in a state where the upper and lower base 2 is in a horizontal posture. The stopper mechanism 30 is configured such that the cam 7 presses the outer surface of the support column 1 while the upper and lower platform 2 is rotated from the folded position to the horizontal position, and the support column 1 is sandwiched between the cam 7 and the inner stopper portion 5a. Then, the slide table 5 is fixed at a fixed position of the support column 1.

  The illustrated slide table 5 has two L metal fittings 5A connected back to back, and is provided with an inner stopper portion 5a and a connecting portion 5b. The two L metal fittings 5A pass through the slit 8 of the support column 1, serve as an inner stopper portion 5a inside the support column 1, and a portion protruding outside the support column 1 serves as a connecting portion 5b. The slide table 5 having this structure can be arranged from the slit 8 to the inside of the column 1 without extending the slit 8 to the upper end of the column 1. This is because, after the two L metal fittings 5A are separately put into the support column 1 from the slit 8, the connecting portion 5b is fixed to become the slide base 5. The support column 1 that does not extend the slit 8 to the upper end can be connected to the upper end in a cylindrical shape to form a strong structure.

  The connecting portion 5b of the slide base 5 is provided with a connection hole 5x for inserting and connecting the rotary shaft 4 connected to the upper and lower bases 2. The inner diameter of the connecting hole 5 x is larger than the outer diameter of the rotating shaft 4. The connection hole 5x is inserted so that the rotating shaft 4 can be rotated, and is connected so that the upper and lower platforms 2 can be tilted via the rotating shaft 4.

  Further, the stopper mechanism 30 shown in FIGS. 7 to 9 is connected to the slide base 5 via the rotary shaft 4 with a pressing plate 6 that presses the outer surface of the support column 1. The pressing plate 6 is connected to the rotating shaft 4 so as to be rotatable. Similarly to the slide base 5, the pressing plate 6 is also provided with a pressing portion 6a and a connecting plate portion 6b that connect the two L brackets back to back and press the outer surface of the support column 1. The pressing plate 6 made of an L metal has a connecting plate portion 6 b stacked on the outside of the connecting portion 5 b of the slide table 5 and connected to the connecting portion 5 b of the slide table 5 with the rotating shaft 4. The connecting plate portion 6b is provided with a through hole 6x through which the rotating shaft 4 is inserted. The rotating shaft 4 is inserted into the through hole 6x and connected to the slide base 5. The inner diameter of the through hole 6 x is larger than the outer diameter of the rotating shaft 4. The pressing plate 6 can move the pressing portion 6a toward the outer surface of the support column 1 and in a direction away from it. Specifically, as shown in FIG. 9, the pressing plate 6 rotates around the rotation shaft 4, so that the pressing portion 6 a comes in close contact with the outer surface of the support column 1. Move to a position that does not contact the outer surface. For this reason, in the state which stops the upper-and-lower stand 2, the press part 6a is closely_contact | adhered to the outer surface of the support | pillar 1, and in the state which moves the upper-and-lower stand 2 up and down, the press part 6a can be moved away from the outer surface of the support | pillar 1. However, as shown by the chain line in FIG. 8, the pressing plate 6 has a through hole 6 x that passes through the rotating shaft 4 as a long hole that is long in the direction approaching and leaving the support column 1, and is a long hole along the rotating shaft 4. , And the pressing portion 6a of the pressing plate 6 can be moved toward and away from the outer surface of the support column 1.

  The stopper mechanism 30 provided with the pressing plate 6 is configured so that the cam 7 presses the outer surface of the support column 1 through the pressing plate 6 as shown in the partially enlarged view of FIG. Thus, the upper and lower platforms 2 can be fixed at a predetermined height. That is, the cam 7 presses the pressing plate 6 against the outer surface of the support column 1 to fix the upper and lower platforms 2 at a predetermined height. In the stopper mechanism 30 having this structure, since the cam 7 does not directly press the outer surface of the column 1, the rotating cam 7 does not damage the outer surface of the column 1, and the pressing force of the cam 7 is wide by the pressing plate 6. The upper and lower platforms 2 can be fixed at a predetermined height by pressing the outer surface of the column 1 with the area. However, in the stopper mechanism, as shown in FIG. 10, the cam 7 can directly press the outer surface of the support column 1 to fix the upper and lower platforms 2 at a predetermined height.

  The upper and lower platform 2 includes a seat portion 20 on the upper surface in a horizontal posture. The seat portion 20 is a portion that sits down when used as a chair. For example, the surface of the cushion material is covered with a sheet material to improve the sitting comfort. However, the seat portion does not necessarily have cushioning properties, and a wooden plate material or the like can be used. Further, the upper and lower platform 2 fixes the support arm 9 to the lower surface of the seat portion 20. The support arm 9 includes a connecting portion 9 </ b> A that protrudes in the vertical direction behind the upper and lower base 2 in a state where the upper and lower base 2 is in a horizontal posture. In the illustrated support arm 9, a portion protruding rearward from the upper and lower platform 2 is bent upward to form a connecting portion 9 </ b> A. The rotating shaft 4 is connected to the upper end of the connecting portion 9A. The support arm 9 is formed by bending a metal plate into a groove shape, and the side walls on both sides are extended upward to provide a pair of connecting portions 9A. The rotating shaft 4 is disposed through the pair of connecting portions 9 </ b> A, and both ends of the rotating shaft 4 are connected to the connecting portions 9 </ b> A of the support arm 9. That is, the through-hole 9x is provided in the position which a pair of connection part 9A opposes, and the rotating shaft 4 is penetrated and connected with this through-hole 9x. The inner diameter of the through hole 9 x is larger than the outer diameter of the rotating shaft 4. The rotary shaft 4 is provided with female screw holes 4A at both ends in the axial direction, and a set screw 14 is screwed into the female screw hole 4A so that the rotary shaft 4 is not disconnected from the connecting portion 9A.

  Further, the upper and lower bases 2 are arranged on both sides of the connecting portion 5 b of the slide base 5 and are provided with a pair of cams 7 that press the outer surface of the support column 1. The upper and lower platform 2 in the figure has a pair of cams 7 fixed to the inner surfaces of a pair of connecting portions 9A through which the rotary shaft 4 is inserted and facing each other. The pair of cams 7 is provided with an insertion hole 7x through which the rotation shaft 4 is inserted, and the pair of cams 7 are connected to both sides of the slide base 5 by inserting the rotation shaft 4 through the insertion hole 7x. The inner diameter of the insertion hole 7 x is larger than the outer diameter of the rotating shaft 4. The insertion hole 7x is inserted so that the rotating shaft 4 can be rotated, and the cam 7 fixed to the support arm 9 can be rotated around the rotating shaft 4 in a state where the upper and lower platforms 2 are tilted. . The pair of cams 7 are provided with projecting portions 7A that press the outer surface of the support column 1 in a state where the upper and lower platforms 2 are tilted and project from the outer peripheral surface.

  The rotating shaft 4 has a connecting hole 5x provided in the connecting part 5b of the slide base 5, a through hole 6x provided in the connecting plate part 6b of the pressing plate 6, an insertion hole 7x provided in the cam 7, and a connecting part 9A. The slide base 5 and the pressing plate 6 are connected to the cam 7 and the connecting portion 9A through the provided through hole 9x. The rotating shaft 4 connects the connecting portion 5b of the slide base 5 to the central portion thereof, and further connects the connecting plate portions 6b of the pressing plate 6 stacked on both sides thereof. 7 and the connecting portion 9A are connected. Therefore, the rotating shaft 4 is connected to the slide base 5 so that the upper and lower bases 2 can be tilted. The cam 7 fixed to the support arm 9 presses the outer surface of the column 1 with the protruding portion 7A in a state where the upper and lower platforms 2 are in a horizontal posture, and the column 1 is sandwiched from both sides by the cam 7 and the inner stopper portion 5a. The slide base 5 is fixed to a fixed position of the support column 1. In the stopper mechanism 30 shown in FIGS. 7 to 9, since the cam 7 presses the outer surface of the support column 1 via the pressing plate 6, the support plate 1 is moved from both sides by the pressing plate 6 pressed by the cam 7 and the inner stopper portion 5a. The slide base 5 is fixed at a fixed position of the column 1 by sandwiching.

  Further, the cam 7 in FIG. 11 presses the pressing plate 6 in a state where the upper and lower platforms 2 are folded, that is, is folded in a posture parallel to the support column 1, and is fixed at this position. Accordingly, the cam 7 shown in the figure has a protruding portion 7a that presses the pressing plate 6 against the outer surface of the support column 1 in a state where the upper and lower bases 2 are in a horizontal posture, and a pressing plate in a state where the upper and lower bases 2 are folded in a folding posture. Two projecting portions 7A of projecting portions 7b for pressing 6 against the outer surface of the support column 1 are provided. In the state where the upper and lower platforms 2 are in a horizontal posture, the stopper mechanism 30 slides by the protruding portion 7a of the cam 7 pressing the outer surface of the column 1 via the pressing plate 6 as shown in FIGS. The base 5 is fixed to the fixed position of the support column 1. Further, in the state where the upper and lower platforms 2 are in the folded position, the stopper mechanism 30 slides by the protruding portion 7b of the cam 7 pressing the outer surface of the column 1 via the pressing plate 6, as shown in FIG. The base 5 is fixed to the fixed position of the support column 1. The illustrated stopper mechanism 30 is provided with cams 7 having the same shape on both sides of the slide base 5. Therefore, when the upper and lower platforms 2 are in the folded posture and the horizontal posture, the protruding portions 7A of both cams 7 press the pressing portions 6a of the pressing plate 6 provided on both sides of the slit 8 against the outer surface of the support column 1, The upper and lower platform 2 is fixed at a predetermined position.

  The above cam 7 presses the pressing plate 6 against the outer surface of the support column 1 in a state where the upper and lower bases 2 are in the horizontal posture and the folding posture, but the upper and lower bases 2 are changed from the horizontal posture to the folding posture. During the tilting from the posture to the horizontal posture, the pressing plate 6 is not pressed against the outer surface of the column 1 by the protruding portion 7A as shown in FIG. Accordingly, in a state where the upper and lower bases 2 are in the middle between the horizontal posture and the folding posture, a gap is provided between the support column 1 without sandwiching the support column 1 from both sides by the pressing plate 6 and the inner stopper portion 5a. The slide table 5 can be smoothly moved up and down along the slit 8 of the support column 1.

  The upper / lower table 2 is connected to the slide table 5 via the rotation shaft 4 so as to be tiltable. Further, the upper and lower platform 2 includes an insertion piece 16 that is inserted into the slit 8 of the column 1 while being tilted in a horizontal posture. 6, 9, and 13 is provided with an insertion piece 16 that protrudes toward the support column 1 on the back surface facing the front surface of the support column 1 in a horizontal posture. The insertion piece 16 is inserted into the slit 8 of the support column 1 in a state where the upper and lower bases 2 are in the horizontal posture, and is extracted from the slit 8 of the support column 1 in a state where the upper and lower bases 2 are tilted in the folding direction from the horizontal posture. They are arranged as follows. The upper and lower base 2 in the figure is a position away from the rotary shaft 4 that is a connecting portion with the slide base 5, and is positioned below the slide base 5 in a state where the upper and lower base 2 is in a horizontal posture. 16 is provided. In the illustrated upper and lower platform 2, the rotary shaft 4 is connected to the upper end of the connecting portion 9 </ b> A of the support arm 9, and the insertion piece 16 is fixed to the lower end portion of the connecting portion 9 </ b> A.

  The insertion piece 16 is inserted into the slit 8 of the column 1 in a state where the upper and lower bases 2 are in a horizontal posture, and holds the upper and lower bases 2 at a fixed position. The insertion piece 16 shown in FIG. 13 is fixed to the back surface of the upper and lower platform 2 as a plate shape protruding toward the support column 1. The insertion piece 16 is a cross section of a portion to be inserted into the slit 8, and a cross-sectional shape in a plane parallel to the front surface of the support column 1 is an elongated rectangle in the extending direction of the slit 8. In this way, the insertion piece 16 having a rectangular cross-sectional shape can be connected while being positioned securely by fitting the side surfaces on both sides to the inner surface of the slit 8 with a wider surface. However, the insertion piece does not necessarily have a rectangular cross-sectional shape, and may be circular or elliptical, polygonal, or partially provided with a wide portion.

  Furthermore, as shown in FIGS. 13 and 14, the insertion piece 16 has a shape that can be press-fitted into the slit. The insertion piece 16 has a lateral width (W), which is a short side of the rectangle, equal to the inner width (S) of the slit 8 or slightly narrower than the inner width (S). 8 is press-fitted. Although not shown in the figure, the insertion piece having a cross-sectional shape that is circular, elliptical, polygonal, or partially provided with a wide portion has the maximum horizontal width in the slit width direction equal to the inner width of the slit, or the inner Narrower than the width, it can be press-fitted into the slit. Thus, the insertion piece 16 press-fitted into the slit 8 is fitted in a state where both side surfaces are in close contact with the inner edge of the slit 8, so that the lower end of the upper and lower base 2 can be securely fixed to the column 1. . However, the insertion piece does not necessarily need to be press-fitted into the slit. This is because the insertion piece inserted into the slit can be connected while positioning the lower end of the upper and lower bases with respect to the support column to prevent the upper and lower bases from rolling.

  Further, the insertion piece 16 of FIGS. 13 and 14 is tapered so that the lateral width becomes narrower toward the tip. This insertion piece 16 is formed with a narrow width (Ws) at the tip. In particular, the insertion piece 16 shown in the figure is formed so that the lateral width gradually decreases from the intermediate portion toward the tip, that is, the tip portion is formed thin to facilitate insertion into the slit 8. The insertion piece 16 is provided with tapered surfaces 16A having a width that decreases toward the tip on both sides of the tip, thereby reducing the width (Ws) of the tip. The insertion piece 16 having this shape can be smoothly inserted by quickly guiding the thin tip portion into the slit 8 in a state where the upper and lower bases 2 are tilted in the horizontal posture and inserted into the slit 8. Further, in a state where the insertion piece 16 is inserted deeply into the slit 8, the rear end portion can be fitted to the opening edge of the slit 8. In particular, the upper and lower platforms 2 can be securely fixed to the column 1 by pressing the insertion piece 16 having the lateral width (W) of the rear end portion equal to the inner width (S) of the slit 8 into the slit 8. Furthermore, although not shown, the insertion piece having a circular or polygonal cross-sectional shape is a cone or truncated cone formed by narrowing the shape of the tip toward the tip, the shape of a pyramid or an angular guessing platform, or As a spherical shape and a shell type, it can be quickly inserted into the slit and smoothly inserted.

  In the state where the upper and lower platforms 2 are tilted in the horizontal posture, the insertion piece 16 is inserted into the slit 8 of the support column 1 and held at a fixed position. The upper and lower stands 2 in a horizontal posture are connected to the support column 1 while positioning the upper end of the connecting portion 9A via the slide base 5 stopped at a predetermined position by the stopper mechanism 30, and the lower end of the connecting portion 9A. The portion is connected to the support column 1 while being positioned through the insertion piece 16 and the slit 8. Accordingly, the upper and lower bases 2 in a horizontal posture are connected to the support column 1 while being positioned at two upper and lower points via the slide base 5 and the insertion piece 16, so that both side portions of the upper and lower bases 2 swing up and down. Is reduced to prevent rolling. Further, by tilting the upper and lower bases 2 from the horizontal posture in the folding direction, the insertion piece 16 is pulled out from the slit 8 and the state in which the outer surface of the column 1 is pressed by the protruding portion 7A of the cam 7 is released. The stopper mechanism 30 that clamps the column 1 from both sides with the inner stopper portion 5a is released, and the upper and lower bases 2 are moved up and down simply, easily and quickly to the optimum height. Can stop reliably.

  In the above vertical mechanism, the stopper mechanism 30 is provided with the cam 7, the cam 7 presses the surface of the column 1, and the column 7 is sandwiched between the cam 7 and the inner stopper portion 5 a to fix the slide base 5. Therefore, the slide table 5 can be securely fixed to the support column 1 in a state in which the upper and lower tables 2 are tilted to the horizontal posture with the optimum height. As described above, the stopper mechanism 30 that can fix the slide base 5 to the support column 1 stably stabilizes the upper and lower bases 2 while reliably preventing the upper and lower bases 2 from sliding down even when no load is applied to the upper and lower bases 2. It has the feature that it can be held in place. Further, the vertical mechanism capable of fixing the slide base 5 to the support column 1 has a feature that can more surely prevent the horizontal swing of the vertical base 2 in a horizontal posture. However, the vertical mechanism of the present invention does not specify the stopper mechanism as a structure that fixes the vertical base by pressing the surface of the column with a cam.

  The stopper mechanism 30 shown in FIG. 15 and FIG. 16 is connected to the slide table 5, and is connected to the inner stopper portion 5 a that contacts the inner surface of the column 1 on both sides of the slit 8, and the upper and lower table 2. And an outer stopper 15 in contact with the outer surface. This vertical mechanism connects the vertical base 2 to the slide base 5 via the rotary shaft 4 without providing a cam on the vertical base 2 and is inserted into the slit 8 of the column 1 at the lower end of the vertical base 2. The insertion piece 16 and the outer stopper 15 are provided. The upper and lower platform 2 shown in the figure has a rotating shaft 4 connected to the upper end of the connecting portion 9A of the support arm 9 that supports the seat portion 20, and an insertion piece 16 and an outer stopper 15 fixed to the back of the lower end portion. Yes. The outer stopper 15 is disposed below the inner stopper portion 5a in a state where the upper and lower platforms 2 are in a horizontal posture.

  The upper and lower platform 2 in the figure is configured as an outer stopper 15 by fixing a rubber plate 19, which is a difficult-to-slip material, to the lower end of the back surface facing the front surface of the support column 1 in a horizontal posture. 16 is provided with rubber plates 19 located on both sides of the insertion piece 16. In this state, the upper and lower platforms 2 are tilted in a horizontal posture so that the insertion pieces 16 are inserted into the slits 8 of the support column 1, and the rubber plates 19 on both sides of the insertion piece 16 are placed on the front surface of the support column 1 on both sides of the slit 8. Make contact. The rubber plate 19 has a feature that can reliably prevent the upper and lower platforms 2 from being lowered while being pressed against the surface of the support column 1 and can prevent the surface of the support column 1 from being damaged. The rubber plate 19 can be a permanent magnet rubber plate. The rubber plate 19 is adsorbed to the iron support 1 and can prevent slipping between the upper and lower platform 2 and the surface of the support 1. The upper and lower platform 2 that rotates about the rotation shaft 4 is stopped at a position where the rubber plate 19 fixed to the back surface is brought into contact with the support column 1 to be prevented from tilting. In this state, the upper and lower platforms 2 are stopped in a horizontal posture as shown in FIG. As shown in FIG. 15, the outer stopper 15, which is a rubber plate 19, is disposed so as to be in surface contact along the surface of the column 1 while being in contact with the column 1. In the horizontal posture, the upper and lower platform 2 brings the rubber plate 19 into surface contact with the surface of the support column 1 in a wide area.

  The stopper mechanism 30 tilts the upper and lower base 2 in a horizontal posture, and when a load is applied to the upper and lower base 2, a rotational moment acts on the upper and lower base 2 in the direction indicated by the arrow A. This rotational moment presses the outer stopper 15 against the front surface of the column 1 and presses the inner stopper portion 5 a of the slide table 5 connected to the upper and lower table 2 via the rotation shaft 4 against the inner surface of the column 1. In this state, the stopper mechanism 30 stops at a predetermined height so that the inner stopper portion 5a presses the inner surface of the support column 1 and the outer stopper 15 presses the front surface of the support column 1 so that the upper and lower platforms 2 are not lowered. To do. Furthermore, the stopper mechanism 30 can move the upper / lower table 2 up and down along the column 1 because the outer stopper 15 does not press the front surface of the column 1 when the upper / lower column 2 is tilted from the horizontal posture in the folding direction.

  In the state in which the vertical base 2 is tilted horizontally, the vertical mechanism is connected to the support column 1 while positioning the upper end of the connecting portion 9A via the slide base 5 and the slit 8, and the lower end portion of the connecting portion 9A. Is connected to the support column 1 while being positioned through the insertion piece 16 and the slit 8. Therefore, the upper and lower bases 2 in a horizontal posture are connected to the support column 1 while being positioned at two upper and lower points via the slide base 5 and the insertion piece 16 that are positioned by the slits 8. The lateral movement of the both sides is greatly reduced and the roll is prevented. Further, by tilting the upper and lower bases 2 from the horizontal posture in the folding direction, the insertion piece 16 is pulled out from the slit 8 and the outer stopper 15 is separated from the surface of the column 1 to release the stop state of the stopper mechanism 30. The upper and lower platform 2 can be moved up and down simply and easily and quickly, and can be surely stopped at the optimum height.

  Further, the stopper mechanism 30 of the vertical mechanism shown in FIGS. 17 to 19 connects the outer stopper 15 to the slide base 5 instead of the vertical base. The outer stopper 15 is positioned below the inner stopper portion 5a and is connected to the slide base 5. The slide table 5 shown in the drawing extends from the slit 8 to the outside of the column 1 with a connecting portion 5b extending downward to provide a protruding portion 5c, and an outer stopper 15 is connected to the protruding portion 5c. In the illustrated slide table 5, a pressing plate 31 facing the front surface of the support column 1 is fixed to the back side of the protruding portion 5 c, and a rubber plate 19 that is a difficult slip material is fixed to the surface of the pressing plate 31. The outer stopper 15 is used. As shown in FIG. 18, the outer stopper 15, which is a rubber plate 19, is disposed so as to be in surface contact with the surface of the column 1 while being in contact with the column 1. The outer stopper 15 is pressed against the front surface of the column 1 by being pushed by the support arm 9 of the upper / lower table 2 in a state where the upper / lower table 2 is tilted to a horizontal posture and a load is applied to the upper / lower table 2. The outer stopper 15 reliably prevents the slide base 5 from descending while being pressed against the surface of the column 1 and prevents the surface of the column 1 from being damaged. The same rubber plate as that described above can be used for the rubber plate 19. In the illustrated stopper mechanism 30, the outer stopper 15 is fixed to the slide table 5, but the outer stopper can also be connected to the slide table so that it can rotate.

  Further, as shown in FIG. 19, the stopper mechanism 30 is configured so that the distance (d) between the inner stopper portion 5 a and the outer stopper 15 is such that the slide table 5 can be moved up and down along the column 1. It is larger than (t). As shown in FIG. 18, the stopper mechanism 30 is configured such that, when a load is applied to the upper and lower base 2 in a horizontal posture, the outer stopper 15 pressed against the support arm 9 of the upper and lower base 2 is pressed against the front surface of the column 1. By the reaction, the inner stopper portion 5a of the slide table 5 connected to the upper end of the upper and lower table 2 presses the inner surface of the support column 1 and stops the slide table 5 at a predetermined height so as not to descend. In this state, the upper and lower platforms 2 are held in a horizontal posture. Therefore, the upper and lower platforms 2 are arranged so that the seat portion 20 is in a horizontal posture in a state where the connecting portion 9A of the support arm 9 presses the outer stopper 15 against the support column 1. Further, as shown in FIG. 19, the stopper mechanism 30 causes the outer stopper 15 to not press the front surface of the column 1 when the upper and lower units 2 are tilted in the folding direction from the horizontal posture, and the slide table 5 is moved along the column 1. Can move up and down.

  Further, the upper and lower platform 2 in the figure is provided with a connecting portion 9A that protrudes in the vertical direction at the rear end of the support arm 9 that supports the lower surface of the seat portion 20, and the upper end of the connecting portion 9A is interposed via the rotary shaft 4. While connecting with the slide base 5, the insertion piece 16 which protrudes toward the support | pillar 1 is being fixed to the lower end of 9 A of connection parts. The insertion piece 16 is disposed below the outer stopper 15 so that the insertion piece 16 can be inserted into the slit 8 of the support column 1 in a state where the upper and lower platforms 2 are tilted in a horizontal posture. Further, the upper and lower base 2 in FIG. 17 is configured by two plates in which the connecting portion 9A of the support arm 9 is laminated on both sides of the connecting portion 5b of the slide base 5. The two plates are connected with a slit 9a provided therebetween. In this state, the vertical mechanism 2 slides the horizontal base 2 in the horizontal position by guiding the connecting part 5b and the protruding part 5c of the slide base 5 to the slit 9a formed in the connecting part 9A. Positioning is made so as not to roll with respect to the base 5.

  As shown in FIG. 18, the upper and lower bases 2 are inserted at the lower end of the connecting portion 9 </ b> A while the slide base 5 is stopped at a predetermined height by the stopper mechanism 30 in a state of tilting in a horizontal posture. A piece 16 is inserted into the slit 8 of the column 1 and held in place. The upper and lower bases 2 in the horizontal posture are connected to the support column 1 while positioning the upper end of the connecting portion 9A through the slide base 5 stopped at a predetermined position, and the lower end portion of the connecting portion 9A is inserted. While being positioned via the piece 16 and the slit 8, it is connected to the support column 1. Accordingly, the upper and lower bases 2 in a horizontal posture are connected to the support column 1 while being positioned at two upper and lower points via the slide base 5 and the insertion piece 16, so that both side portions of the upper and lower bases 2 swing up and down. Is reduced to prevent rolling. Further, by tilting the upper and lower bases 2 from the horizontal posture in the folding direction, the insertion piece 16 is pulled out from the slit 8, and the pressing state in which the outer stopper 15 presses the front surface of the column 1 is released, and the slide table 5 is moved to the column. 1 can be moved up and down along 1 to move the upper and lower platform 2 to an optimum height.

  Further, the stopper mechanism 30 of the vertical mechanism shown in FIGS. 20 to 22 connects the outer stopper 15 to the slide table 5 via the arm 32 so that the outer stopper 15 can be rotated in the vertical plane. The arms 32 are located on both sides of the protruding portion 5 c of the slide table 5 and are connected to the slide table 5 via a rotation pin 33 so as to be freely rotatable. The arm 32 fixes a pressing plate 31 facing the front surface of the support column 1, and a rubber plate 19, which is a difficult slip material, is fixed to the surface of the pressing plate 31 as an outer stopper 15. The outer stopper 15 is pressed against the front surface of the column 1 by being pushed by the support arm 9 of the upper / lower table 2 in a state where the upper / lower table 2 is tilted to a horizontal posture and a load is applied to the upper / lower table 2. The outer stopper 15 that can rotate can bring the rubber plate 19 into surface contact with the surface of the support 1. The rotation of the outer stopper 15 is prevented while the rubber plate 19 is in surface contact. Accordingly, the outer stopper 15 can be rotated, but is not freely rotatable, and is stopped at a position where the rubber plate 19 is brought into contact with the support column 1 by being pressed by the support arm 9. As shown in FIG. 21, the outer stopper 15, which is a rubber plate 19, reliably prevents the slide base 5 from descending while being pressed against the surface of the column 1, and damages the surface of the column 1. To prevent. The same rubber plate as that described above can be used for the rubber plate 19.

  The upper and lower platform 2 in the figure is provided with a connecting portion 9A by bending the rear end portion of the support arm 9 that supports the lower surface of the seat portion 20 upward. The upper and lower bases 2 connect the upper end of the connecting portion 9A to the slide base 5 via the rotary shaft 4, and in the horizontal position, press the arm 32 at the lower end portion of the connecting portion 9A to place the outer stopper 15 on the column. 1 is pressed against the front surface. Therefore, the upper and lower bases 2 bend the rear end portion of the support arm 9 so that the seat portion 20 is in a horizontal posture in a state where the connecting portion 9A of the support arm 9 presses the outer stopper 15 against the support column 1. . The arm 32 shown in the figure has an inclined surface 32A that is pressed by the connecting portion 9A of the support arm 9, and is inclined to a horizontal posture by pressing the inclined surface 32A at the lower end portion of the connecting portion 9A that tilts. The outer stopper 15 presses the front surface of the support column 1 in conjunction with the upper and lower platforms 2. However, the support arm can also press the outer stopper directly without going through the arm. Further, the upper and lower base 2 in the figure is configured by two plates in which the connecting portion 9A of the support arm 9 is laminated on both sides of the connecting portion 5b of the slide base 5, and a slit 9a is formed between the two plates. It is connected in the state of providing. In this state, the vertical mechanism 2 slides the horizontal base 2 in the horizontal position by guiding the connecting part 5b and the protruding part 5c of the slide base 5 to the slit 9a formed in the connecting part 9A. Positioning is made so as not to roll with respect to the base 5.

  Further, the stopper mechanism 30 shown in the figure connects the insertion piece 16 to the slide base 5. In the illustrated slide table 5, an insertion piece 16 is provided on an outer stopper 15 connected via an arm 31. The outer stopper 15 in the figure fixes an insertion piece 16 protruding toward the column 1 at the center of the pressing plate 31, and rubber plates 19 are arranged on both sides of the insertion piece 16. This insertion piece 16 is fixed to the outer stopper 15 so that it can be inserted into the slit 8 of the column 1 in a state where the upper and lower platforms 2 are tilted in a horizontal posture and the outer stopper 15 is pressed against the front surface of the column 1. In the illustrated slide table, the insertion piece is connected via a pivotable arm, but the insertion piece can also be directly connected to the slide table.

  As shown in FIG. 20, the above stopper mechanism is connected to the support column 1 while the upper part of the slide table 5 is positioned via the connecting part 5 b and the slit 8 in a state where the upper and lower bases 2 are tilted horizontally. At the same time, the lower part of the slide table 5 is connected to the support column 1 while being positioned via the insertion piece 16 and the slit 8. The slide base 5 is connected to the support column 1 while being positioned at two upper and lower positions via the connecting portion 5b positioned by the slit 8 and the insertion piece 16, and the roll to the support column 1 is prevented. Therefore, the upper and lower platforms 2 in the horizontal posture are prevented from rolling by preventing the slide table 5 from rolling.

  Further, the vertical mechanism shown in the figure is such that the pressing state in which the outer stopper 15 presses the front surface of the support column 1 is released while the vertical base 2 is tilted in the folding direction from the horizontal posture, and the insertion piece 16 is released from the slit 8. By being pulled out, the slide table 5 can be moved up and down along the support column 1 to move the upper and lower table 2 to the optimum height. When the outer stopper 15 connected to the slide base 5 via the arm 32 is released from the pressing state by the support arm 9, the arm 32 is rotated in a direction away from the front surface of the column 1, and the insertion piece 16 is moved. While being pulled out from the slit 8, the pressing state of the outer stopper 15 is released. The arm 32 is rotated in a direction in which the outer stopper 15 is separated from the front surface of the support column 1 by operating, for example, by hand or in conjunction with an upper and lower base tilted in the folding direction. Although the structure for rotating the arm in conjunction with the upper and lower stands is not shown in the figure, the arm is urged away from the front surface of the column with an elastic body, or the arm is connected to the support arm via a link or the like. Can be realized.

  Furthermore, as another embodiment of the present invention, FIGS. 23 and 24 show an up-and-down mechanism that uses a table with a top plate as a table that can move up and down, and a display shelf that can move the top and bottom with a table up and down. The up-and-down mechanism used is shown in FIGS. The vertical mechanism shown in these drawings allows the vertically extending support 1 to stand upright in a vertical posture, and connects the vertical base 2 having the top plate 40 to the slide base 5 via the rotation shaft 4. Is connected to the support column 1 so as to move up and down along the slit 8. The slide table 5 is stopped at a predetermined position of the support column 1 via the stopper mechanism 30 in a state where the upper and lower tables 2 are in a horizontal posture. The stopper mechanism 30 is the stopper mechanism shown in FIGS. Therefore, detailed description of the stopper mechanism is omitted.

  The vertical mechanism shown in FIGS. 23 and 24 supports the lower end of the support column 1 with a support leg 41 so that the support column 1 can stand upright in a vertical posture. The support leg 41 in the figure includes a horizontal rod 42 connected to the lower end of the column 1 and a support rod 43 connected to both ends of the horizontal rod 42. The support rod 43 is in a horizontal posture and is fixed perpendicular to the horizontal rod 42. As described above, the support leg 41 including the horizontal rod 42 and the support rod 43 prevents the support column 1 from falling sideways. Further, the illustrated support leg 41 is provided with rubber caps 44 at both ends of the support rod 43. This vertical mechanism prevents the support leg 41 from sliding relative to the floor surface while protecting the floor surface from being damaged by caps 44 provided at the four corners of the support leg 41.

  The upper / lower platform 2 is provided with a top plate 40 on the upper surface in a horizontal posture. The top and bottom base 2 shown in the figure uses the top plate 40 as a glass plate. However, the top plate is not necessarily a glass plate, and a wooden plate or the like can be used. Further, the upper and lower platform 2 includes a support frame 49 that supports the top plate 40 along the outer periphery of the top plate 40. The support frame 49 includes a peripheral wall 49 a along the outer peripheral surface of the top plate 40, and a support portion 49 b that supports the lower surface of the outer peripheral edge of the top plate 40. The support frame 49 connects the peripheral wall 49a and the support portion 49b to have an L-shaped cross section. Furthermore, the support frame 49 includes a connecting portion 49A that protrudes in the vertical direction with the upper and lower platforms 2 in a horizontal posture at the rear thereof. In the illustrated support frame 49, a connecting portion 49 </ b> A that protrudes vertically is fixed to the back surface of the support frame 49, and the upper end of the connecting portion 49 </ b> A can be tilted to the slide table 5 via the rotation shaft 4. It is connected. Further, the support frame 49 is provided with the insertion piece 16 protruding toward the support column 1 on the back surface of the connecting portion 49 </ b> A and facing the front surface of the support column 1 in the horizontal posture.

  25 and 26 show specific examples in which a shelf plate 46 such as a shelf, a display shelf, and a bookcase is used for an up-and-down mechanism that moves up and down. The vertical mechanism connects the two struts 1 in parallel to each other so as to be self-supporting in a vertical posture. The two struts 1 are connected to each other by a connecting rod 45 and support legs 43 are fixed to both sides of the lower end. The support column 1 is self-supporting in a vertical posture with the support leg 43. The support legs 43 fixed to the support columns 1 on both sides are fixed to the lower end of the support column 1 with rods that are parallel to each other and extend in a horizontal direction.

  A vertical base is connected to each column. The vertical mechanism that moves the vertical platform up and down along the support and fixes it at a predetermined height is the same as the vertical mechanism of the chair shown in FIGS. The upper and lower platform 2 has a shelf plate 46 fixed on the support arm 9. The upper and lower platforms 2 connected to the left and right columns 1 are moved up and down along the columns 1 and stopped at a predetermined height. At this time, the shelf plate 46 is removed and the support arm 9 of the upper and lower platform 2 is moved up and down to be fixed at a predetermined height, and the shelf plate 46 is placed on the support arm 9 in this state. The upper and lower platforms 2 connected to the left and right columns 1 are fixed to the columns 1 at the same height. A shelf board 46 is placed on the upper and lower platform 2 and used for shelves, display shelves, book stands, and the like. The upper and lower platforms 2 connected to the left and right columns 1 are fixed to the columns 1 so that the shelf 46 is horizontal, but the upper and lower platforms 2 are fixed at different heights and the shelf 46 is inclined. It can also be connected to the column.

It is a perspective view of the chair which this inventor developed previously. It is a horizontal sectional view which shows the coupler of the chair shown in FIG. FIG. 2 is a vertical cross-sectional view showing the coupler of the chair shown in FIG. 1. It is a perspective view of the up-and-down mechanism concerning one example of the present invention. It is a back perspective view of the up-and-down mechanism shown in FIG. It is a partially expanded side view of the up-and-down mechanism shown in FIG. It is an expanded sectional view which shows the stopper mechanism of the up-and-down mechanism shown in FIG. 4, Comprising: It is a figure which shows the connection structure of a support | pillar, a slide base, and an up-and-down base. It is a disassembled perspective view which shows the stopper mechanism of the up-and-down mechanism shown in FIG. It is an expanded sectional view showing the state where a stopper mechanism stops a slide stand in a state where the upper and lower stands are in a horizontal posture. It is an expanded sectional view showing other examples of a stopper mechanism. It is a partially expanded side view which shows the state which makes the upper-lower base of the up-and-down mechanism shown in FIG. 6 a folding attitude | position. It is an expanded sectional view which shows the state which makes an up-and-down base an intermediate position of a horizontal attitude | position and a folding attitude | position. It is a bottom perspective view which shows the connection structure of a support | pillar and an up-and-down base. It is AA sectional view taken on the line of the support | pillar shown in FIG. It is an expanded sectional view showing other examples of a stopper mechanism. FIG. 16 is a bottom perspective view showing a connection structure between a support and a vertical base of a vertical mechanism including the stopper mechanism shown in FIG. 15. It is a perspective view which shows another example of a stopper mechanism. It is an expanded sectional view which shows the state which makes the upper-and-lower stand of an up-and-down mechanism provided with the stopper mechanism shown in FIG. 17 a horizontal attitude | position. It is an expanded sectional view which shows the state which tilts the up-and-down base of the up-and-down mechanism shown in FIG. 18 in the folding direction. It is a perspective view which shows another example of a stopper mechanism. It is an expanded sectional view which shows the state which makes the upper-and-lower stand of an up-and-down mechanism provided with the stopper mechanism shown in FIG. 20 into a horizontal attitude | position. It is an expanded sectional view which shows the state which tilts the up-and-down base of the up-and-down mechanism shown in FIG. 21 in the folding direction. It is a perspective view of the up-and-down mechanism concerning other examples of the present invention. FIG. 24 is an enlarged cross-sectional view illustrating a state in which the upper and lower platforms of the vertical mechanism illustrated in FIG. 23 are in a horizontal posture. It is a perspective view of the up-and-down mechanism concerning other examples of the present invention. FIG. 26 is an enlarged cross-sectional view illustrating a state in which the upper and lower platforms of the vertical mechanism illustrated in FIG. 25 are in a horizontal posture.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Prop 2 ... Up-and-down base 3 ... Support leg 4 ... Rotating shaft 4A ... Female screw hole 5 ... Slide stand 5A ... L metal fitting
5a ... Inner stopper
5b ... connection part
5c ... Projection
5x: Connecting hole 6: Pressing plate 6a: Pressing part
6b ... Connecting plate part
6x ... through hole 7 ... cam 7A ... projection
7a ... Projection
7b ... Projection
7x ... insertion hole 8 ... slit 9 ... support arm 9A ... connection part
9a ... Slit
9x ... Through hole 10 ... Handle 11 ... Curved rod 12 ... Horizontal rod 13 ... Cap 14 ... Set screw 15 ... Outer stopper 16 ... Insertion piece 16A ... Tapered surface 17 ... Holding bracket 18 ... Pin 19 ... Rubber plate 20 ... Seat 30 ... Stopper mechanism 31 ... Pressing plate 32 ... Arm 32A ... Inclined surface 33 ... Rotating pin 40 ... Top plate 41 ... Support leg 42 ... Horizontal rod 43 ... Support leg 44 ... Cap 45 ... Connecting rod 46 ... Shelves 49 ... Support frame 49A ... Connection part
49a ... Surrounding wall
49b ... support part 91 ... support 92 ... seat 94 ... connector 95 ... slide base 96 ... inner stopper 97 ... outer stopper 98 ... slit

Claims (11)

A support column (1) extending vertically, a slide base (5) connected to the support column (1) so as to move up and down, and the slide base (5) from a horizontal posture through a rotating shaft (4) And an upper and lower platform (2) connected so as to be tilted to a folding position,
The strut (1) has a slit (8) extending in the vertical direction, and is connected to the strut (1) so that the slide base (5) can move up and down along the slit (8), and A stopper mechanism (30) capable of stopping the slide table (5) at a predetermined vertical position of the support column (1) in a state where the upper and lower tables (2) are in a horizontal posture,
The upper and lower bases (2) are connected to the slide base (5) so as to be tiltable, and are provided with an insertion piece (16) to be inserted into the slit (8) of the column (1) in a horizontal posture. The inserted piece (16) is inserted into the slit (8) of the support column (1), and the inserted piece (16) and the slit (8) prevent the horizontal platform from being swayed by the upper and lower stands (2). A vertical mechanism that can move the vertical platform up and down. A support column (1) extending vertically, a slide base (5) connected to the support column (1) so as to move up and down, and the slide base (5) from a horizontal posture through a rotating shaft (4) And an upper and lower platform (2) connected so as to be tilted to a folding position,
The strut (1) has a slit (8) extending in the vertical direction, and is connected to the strut (1) so that the slide base (5) can move up and down along the slit (8), and A stopper mechanism (30) capable of stopping the slide table (5) at a predetermined vertical position of the support column (1) in a state where the upper and lower tables (2) are in a horizontal posture,
The upper and lower bases (2) are connected to the slide base (5) so as to be tiltable, and the slide base (5) is interlocked with the upper and lower bases (2) tilted in a horizontal posture to support the strut ( 1) is provided with an insertion piece (16) to be inserted into the slit (8), and this insertion piece (16) is inserted into the slit (8) of the support column (1) to form the insertion piece (16) and the slit. (8) An up-and-down mechanism capable of moving up and down the upper and lower bases so as to prevent rolling of the upper and lower bases (2) in a horizontal posture. The stopper mechanism (30) is connected to the slide base (5) and contacts the inner surface of the column (1) on both sides of the slit (8), and the inner stopper portion (5a ) And the connecting part (5b) protruding from the slit (8) to the outside of the column (1) and the connecting hole (5x) provided in the connecting part (5b), 2) a rotating shaft (4) connected to the slide table (5) so as to be tiltable, and connected to the upper and lower table (2) and positioned on both sides of the connecting part (5b). A cam (7) that presses the outer surface of the column (1) in a state where (2) is in a horizontal posture,
With the upper and lower platforms (2) being rotated from the folded position to the horizontal position, the cam (7) presses the outer surface of the column (1), and the cam (7) and the inner stopper portion (5a) The vertical mechanism according to claim 1, wherein the vertical base can be moved up and down by sandwiching the post (1) and fixing the slide base (5) to a fixed position of the post (1).   A pressure plate (6) that presses the outer surface of the support column (1) is connected to the slide base (5) via a rotation shaft (4), and the pressure plate (6) is connected to the rotation shaft (4). The cam (7) presses the outer surface of the column (1) via the pressing plate (6) in a state where the upper and lower platforms (2) are in a horizontal posture. Up and down mechanism that can move up and down the platform described in 1. The stopper mechanism (30) is connected to the slide base (5), and has an inner stopper portion (5a) that contacts the inner surface of the column (1) on both sides of the slit (8), and a slide base (5) or The outer stopper (15) is connected to the upper and lower base (2) and abuts against the front surface of the column (1). It is arranged below the stopper part (5a),
The upper stopper (2) is rotated from the folded position to the horizontal position, and the inner stopper (5a) is pressed against the inner surface of the column (1) while the load is applied to the upper and lower base (2) and the outer side The upper and lower bases according to claim 1 or 2, wherein the stopper (15) is pressed against the front surface of the column (1) to stop the slide base (5) at a predetermined height so as not to descend. Up and down mechanism that can move to.   The vertical mechanism according to claim 1 or 2, wherein the insertion piece (16) has a tapered shape in which a lateral width is reduced toward a distal end portion.   With the upper and lower base (2) in a horizontal posture, the insertion piece (16) is press-fitted into the slit (8), and the upper and lower base (2) is inserted with the insertion piece (16) and the slit (8). An up-and-down mechanism capable of moving an up-and-down base up and down as described in claim 1 or 2 so as to prevent rolling of the up-and-down.   The vertical mechanism according to claim 1 or 2, wherein the vertical platform (2) includes a seat (20), and the vertical mechanism is a mechanism for moving the chair seat (20) up and down.   3. The upper and lower platform according to claim 1, wherein the upper and lower platform (2) includes a top plate (40), and the vertical mechanism is a table or display table vertical mechanism that raises and lowers the top plate (40). Vertical mechanism that can move.   The said upper-and-lower stand (2) is provided with a shelf board (46), and the said up-and-down mechanism is any one of the up-and-down mechanism of the shelf which raises and lowers the shelf board (46), a display shelf, or a book stand. A vertical mechanism that can move the vertical platform up and down.   The upper and lower base (2) fixes the support arm (9) to the lower surface of the seat (20) or the shelf board (46), and this support arm (9) is located behind the upper and lower base (2), In a state where the upper and lower base (2) is in a horizontal posture, it is provided with a connecting portion (9A) that protrudes in the vertical direction, and the rotating shaft (4) is connected to the upper end of the connecting portion (9A) to connect the connecting portion ( An up-and-down mechanism capable of moving up and down the upper and lower bases according to claim 8 or 9, wherein an insertion piece (16) is provided at the lower end of 9A).

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