JPH0249608A - Folding device for leg body - Google Patents

Abstract

PURPOSE:To separate the engaging sections of both leg bodies confronted with each other according to the operation of an operating lever, from engaging recessed sections respectively, easily, and exactly by setting the operating lever for separating the engaging sections from the engaging recessed sections, between members for supporting the engaging sections, and members for forming the engaging recessed sections. CONSTITUTION:In the folding device of leg bodies 3 for forming engaging recessed sections 13 for engaging the leg bodies 3 in a risen state, on bearing brackets 2 for supporting the leg bodies 3 to be freely risen and fallen, fitting engaging sections 8a supported on the upper flange sections 6 of the leg bodies 3, into the engaging recessed sections 13 with the energizing force of energizing members 16, and keeping the leg bodies 3 stably in the risen state, the engaging sections 8a, 8a of the leg bodies 3, 3 confronted with each other are formed with one movable bar 8, and both the engaging sections 8a, 8a are integrally connected with an operating section 8b, and an operating lever 17 for retaining the operating section 8b is set, and by operating the operating lever 17 rotationally, the movable bar 8 is driven in a specified lever ratio, and both the engaging sections 8a, 8a are respectively separated from the respective engaging recessed sections 13, 13, and the engaged state of the leg bodies 3, 3 confronted with each other is released easily at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a folding device for legs that are provided on a top plate of a table or the like so as to be able to rise and fall freely.

[Prior Art] Conventionally, in order to enable the legs to be folded along the back surface of the top plate when the table is not in use, the legs are supported by support brackets so as to be able to rise and fall freely, and the legs are provided on the support brackets. It is known that the leg is held in an upright state during use by engaging a locking pin with a locking portion formed on the leg.

[Problems to be Solved by the Invention] With conventional tables, it is necessary to raise and lower each leg individually and to operate a locking pin to maintain the table in the upright position, making the operation of raising and lowering the legs extremely complicated. Additionally, if one of the locking mechanisms for holding each leg in an upright position is damaged, the legs cannot be held in an upright position, making the entire table unusable.

The present invention has been made to solve the above problems, and is capable of raising and lowering a pair of opposing legs at the same time, and also locks both of the legs together in an upright state during use. By doing so, it is an object of the present invention to provide a leg folding device that can maintain its erected state even if the locking mechanism of one leg is damaged.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of support brackets attached to the lower surface of a top plate, etc., legs supported by each support bracket in a freely undulating manner, a connecting member that integrally connects the opposing legs; a locking recess for locking the legs in the upright state is formed in the support bracket; and a locking recess for locking the legs in the upright state; A locking portion that is removably engaged is supported by the leg, and an urging force is applied between the leg and the support bracket in a direction to engage the locking portion with the locking recess. Both locking portions are provided with a member and an operating lever for moving the locking portion in a direction to move the locking portion away from the locking recess against the biasing force of the biasing member, and are supported by opposing legs. are connected together by an operating section.

The operating lever may be omitted by directly gripping the operating part that connects the two locking parts together and moving the two locking parts away from the locking recess.

A locking recess that locks the leg in an upright state is formed in the leg, and a support bracket supports the locking portion that is removably engaged with the locking recess when the leg is in the upright state. You can also do it.

In addition, in order to stably hold the legs in the folded state when not in use, the legs are locked in the folded state to a member formed with a locking recess for locking the legs in the upright state. It is desirable to form a locking recess.

In addition, in order to prevent the legs from wobbling when the legs are placed in an upright position, there is a locking recess that locks the legs in the upright position, and a locking recess that is removably engaged with the locking recess. The elongated hole that movably supports the locking part is formed into a tapered shape so that the groove width at the inner end becomes small, and the diameter of the inner end of the locking recess and the elongated hole is adjusted to the diameter of the locking part. It is formed smaller than the diameter.

[Operation] According to the above configuration, when the leg is erected, the locking part is fitted into the locking recess formed in the support bracket or the leg by the biasing force of the biasing member, and the leg is erected. When the legs are locked in an upright position and the legs are folded, both of the above-mentioned locks can be released by operating the operation part that connects the locking parts of the opposing legs together in the direction of disengaging the locking parts. When the engagement state of the stop portions is released at the same time and one leg is folded in this state, the other leg that is integrally connected by the connecting member is also folded at the same time.

In addition, a locking recess for locking the leg in an upright state and an elongated hole for movably supporting the locking portion that is removably engaged with the locking recess are arranged so that the groove width at the inner end is If the diameter of the inner end of the locking recess and the elongated hole is smaller than the diameter of the locking part, the locking part will be smaller when the leg is in the upright position. The locking portions are pressed against both upper and lower sides of the recess and the elongated hole according to the biasing force of the biasing member.

[Embodiment] FIGS. 1 to 3 show a table equipped with a leg folding device according to a first embodiment of the present invention. This table includes a top plate 1 and legs 3 which are installed at the corners of the back surface of the top plate 1 via support brackets 2 so as to be able to rise and fall freely. are connected together by.

A pair of flange portions 5.6 are formed at the upper end portion of the leg body 3 and serve as connection portions to the support bracket 2, and an elongated hole 7 is formed in the 7 flange portions 6 on the inner side. and,
A side end portion of a movable bar 8, which is engaged with a locking recess 13, 14 (described later), is supported in this elongated hole 7 so that it can be moved in the horizontal direction while the leg body 3 is in an upright state. That is, at both end portions of the movable bar 8, there are locking portions 8a for locking the opposing legs 3 in the upright state or folded state, respectively.

8a is formed, and both locking portions 8a, 8a are connected to the movable bar 8.
are integrally connected by an operating section 8b consisting of an intermediate portion.

The support bracket 2 consists of a mounting plate 9 that is attached to the lower surface of the top plate 1 by means such as screws, and a pair of side plates 10 and 11 that protrude downward from the sides of the mounting plate 9. The upper end flange portion 5.6 of the leg body 3 is rotatably connected to the side plates 10.11 via the connecting shaft 12, so that the leg body 3 can rise and fall freely using the connecting shaft 12 as a fulcrum. configured to be supported. Further, a locking recess 13 is formed on the outer edge of the inner side plate 11, and a locking recess 13 is formed in which the locking portion 8a of the movable bar 8 is removably engaged when the leg body 3 is in the upright state. A locking recess 14 is formed at the lower end of the leg 11, and the locking recess 14 is removably engaged with the locking portion 8a when the leg body is folded. A cam surface 15 is provided. A biasing member 16 made of a tension spring is disposed between the locking portion 8a of the movable bar 8 and the connecting shaft 12, and the biasing member 16 causes the locking portion 8a of the movable bar 8 to is biased in a direction to be engaged with the locking recess 13.14 of the side plate 11.

A locking portion 8 of the movable bar 8 is provided on the upper end flange portion 6 of the leg body 3.
An operating lever 17 is attached to move the lever a in a direction to separate it from the locking recesses 13 and 14. That is, the base end portion of a link member 18 is rotatably supported by the connecting shaft 12 on the upper end flange portion 6 of the leg body 3, and the operating portion 8b of the movable bar 8 is held at the distal end portion of the link member 18. The left and right upper ends of the operating lever 17 are rotatably supported by connecting pins 19, respectively.

In the above configuration, when the legs 3 are in an upright state,
As shown in FIG. 2, the locking part 8a of the movable bar 8 supported by the upper end of the leg 3 faces the locking recess 13 formed in the upper part of the side plate 11 of the support bracket 2, and Due to the biasing force of the biasing member 16, the locking portion 8a is closed to the locking opening/portion 1.
3 and is locked. For this reason, the leg body 3 is prevented from rotating by the locking portion 8a, and is stably held in an upright state.

When folding the leg 3, as shown in FIG. 4, pull the lower end of the operating lever 17 outward and rotate the operating lever 17 clockwise in the figure using the connecting bin 19 as a fulcrum. The operating lever 1 is operated against the urging force of the urging member 16.
By moving the movable bars 8 held by the levers 7 outward along the elongated holes 7 of the legs 3, the locking portions 8a, 8a located at both ends of the operating lever 17 are simultaneously locked into the support bracket 2. It is separated from the stop recess 13. When the operating lever 17 or the leg body 3 is held and the legs 3, 3 facing each other are rotated together around the connecting shaft 12, the locking portion 8a of the movable bar 8 is moved to the support bracket 2. It will slide along the cam surface 15 of. When the leg 3 is further rotated and folded, the locking portion 8a of the movable bar 8 is attached to the lower end of the side plate 11 of the support bracket 2, as shown in FIG. Formed locking recess 14
The locking portion 8a is fitted into the locking recess 14 by the urging force of the urging member 16, and the leg body 3 is locked in the folded state.

A locking recess 13 for locking the leg 3 in an upright state is formed in the support bracket 2 that supports the leg 3 in an upright manner. Stop part 8
a to the locking recess 13 by the urging force of the urging member 16.
In the folding device for the legs 3 which is inserted into the folding device to stably hold the legs 3 in an upright state, the locking portions 8a, 8a of the opposing legs 3°3 are connected to one movable bar 8. The locking parts 8a, 8a are integrally connected by an operating part 8b, and an operating lever 17 is provided to hold the operating part 8b.By rotating the operating lever 17, the movable bar 8 is driven at a predetermined lever ratio to separate the locking portions 8a, 8a from the respective locking recesses 13.13.
．． 3 can be released easily and simultaneously.

Further, since the opposing legs 3, 3 are integrally connected by the connecting member 4, for example, when one leg 3 is shifted from the standing state to the folded state, the other leg 3 is also shifted to the folded state at the same time. This allows the legs 3 to be easily folded or raised. Moreover,
When one leg 3 is held in an upright position by the locking portion 8a, the other leg 3 is also held together in an upright position. Therefore, even if the function of the locking part 8a for locking the leg 3 in the upright position is impaired due to, for example, damage to the locking recess 13 of the other leg 3, one leg 3 As long as the function of the locking portion 8a that locks the table in the upright position is not impaired, both legs 3 can be maintained in the upright position, and the entire table can be prevented from becoming unusable.

Furthermore, in this embodiment, the operating lever 17 is supported by the upper end flange portion 6 of the leg 3 via the link member 18, so that when the operating lever 17 is operated, the link member 18 uses the connecting shaft 12 as a fulcrum. As the operation lever 17 rotates, the connecting pin 19, which serves as a rotational fulcrum, moves, thereby smoothly engaging the locking portion 8a along the elongated hole 7 formed in the upper end 7 flange portion 6 of the leg 3. It has the advantage that it can be moved.

Further, in the above embodiment, a locking recess 14 for locking the leg body 3 in the folded state is formed in the support bracket 2, and the locking portion 8a is inserted into the locking recess 14 by the urging force of the urging member 16.
Since the locking portion 8a is configured to be fitted into the locking recess 14 to prevent it from coming off from the locking recess 14, the leg body 3
It has the advantage that it can be stably held in a folded state.

Note that the locking recess 14 is omitted, and the locking portion 8a is pressed against the cam surface 1 of the support bracket 2 by the urging force of the urging member 16.
The legs 3 may be pressed against the legs 5 to prevent the legs 3 from shifting from the folded state to the upright state depending on its own weight or the like. In this case, there is no need to hold the operating part 8b of the movable bar 8 and move the locking part 8a away from the locking recess 14, and the leg body 3 can be rotated using the connecting bin 19 as a fulcrum. There is an advantage that the legs 3 can be easily transferred from the folded state to the standing state by simply doing this. Also, a locking recess 14 that locks the leg body 3 in an upright state.
By setting the depth small, the leg body 3 can be raised from the folded state without requiring the operation of holding the operation part 8b of the movable bar 8 to separate the locking part 8a from the locking recess 14. The above effect of transitioning to a state can be achieved.

In the above embodiment, a locking recess 13.14 for locking the leg body 3 in the upright state and the folded state is formed in the side plate 11 of the support bracket 2, and a movable bar is locked in the locking recess 13.14. The locking portion 8a1 of 8, the operation lever 17 and the link member 18 are supported by the upper end flange portion 6 of the leg body 3, and locking recesses 13, 14, etc. are formed in the upper end flange portion 6 of the leg body 3. At the same time, the locking portion 8a of the movable bar 8, the operating lever 17, and the link member 18 are supported on the side plate 11 of the support bracket 2, and the locking portion 8a is attached in a direction to engage with the locking recesses 13 and 14. A structure in which the force is applied by the force member 16 may be used.

In the first embodiment, the locking portion B of the legs 3, 3 facing each other is
In order to easily separate the locking recesses 13, 14, etc., the operating lever 17, link member 18, etc. are provided.
As in the second embodiment shown in the figure, the structure may be such that the operating lever, the link member 18, etc. are omitted. This second
In the embodiment, for example, when moving the leg 3 from the standing state to the folded state, the operation part 8b of the movable bar 8 is directly held with the hand and pulled outward, and the leg body 3 is moved against the biasing force of the biasing member 16. By moving the locking parts 8a, 8a of the bar 8 outward along the long holes 7 of the leg body 3, the support bracket 2
It is configured to be spaced apart from the locking recess 13 of. Then, in this state, the opposing legs 3°3 are rotated together around the connecting shaft 12, and the locking portion 8a of the movable bar 8 is connected to the cam of the support bracket 2, as shown in FIG. After sliding along the surface 15, it is moved to the folded state shown in FIG.

In this second embodiment, by gripping the central part of the movable bar 8 and applying force in the disengagement direction evenly to both the locking parts 8a, 8a, the locking parts 8a, 8a are moved toward each other. At the same time, the legs 3 are separated from the locking recesses 13, etc. of the legs 3. Also in this second embodiment, the locking recesses 13, 14, etc. are formed in the upper end flange portion 6 of the leg body 3, and the locking portion 8a of the movable bar 8 is supported on the side plate 11 of the support bracket 2. It may be made to hold.

Also, the above 1. In the second embodiment, the elongated hole 7 of the leg body 3 movably supports the locking part 8a of the movable bar 8, and the locking recess of the support bracket 2 in which the locking part 8a is removably engaged. As shown in FIGS. 11 and 12, the groove 13 is tapered so that the groove width at the inner end becomes small, and the arcuate surface of the inner end is connected to the locking part 8a.
By forming the locking portion 8a smaller than the diameter of the locking portion 8a, the locking portion 8a can be smoothly slid along the long hole 7 and the locking recess 13.
It is desirable to be able to perform a riding operation and to prevent the legs 3 from shaking in the standing state. That is, when the elongated hole 7 and the locking recess 13 are formed in the shape of parallel grooves, in order to smoothly slide the locking portion 8a along the parallel grooves,
It is necessary to make the groove width larger than the diameter of the locking portion 8a. Therefore, when the leg 3 is placed in an upright state, it is not possible to prevent the locking portion 8a from moving up and down within the elongated hole 7 and the locking recess 13, causing the leg 3 to wobble. It turns out.

On the other hand, when the elongated hole 7 of the leg body 3 and the locking recess 13 of the support bracket 2 are formed in a tapered shape so that the groove width at the inner end becomes small as described above, the leg body 3 During the folding operation, the locking portion 8a of the movable bar 8 can be smoothly slid outward, and the locking portion 8a can be easily separated from the locking recess 13. Then, the circular arc surfaces of the inner ends of the elongated hole 7 and the locking recess 13 are connected to the locking portion 8.
By setting the diameter to be smaller than the diameter of a, when the leg body 3 is placed in an upright state, the locking portion 8a of the movable bar 8 touches both upper and lower ends of the elongated hole 7 and the locking recess 13 in the vicinity of the inner end. Since the leg body 3 is locked in a state in which it is securely in contact with the locking portion 8a, it is possible to reliably prevent the leg body 3 from wobbling due to the vertical movement of the locking portion 8a.

In addition, if the distance from the top plate 1 to the elongated hole 7 of the leg 3 differs from the distance from the top plate 1 to the locking recess 13 of the support bracket 2 due to manufacturing errors, The locking portion 8a of the movable bar 8 is locked in a state of partial contact with the tapered elongated hole 7 and the upper or lower side of the locking recess 13 of the support bracket 2 as described above. This may cause the leg body 3 to wobble. For this reason, it is desirable to form the slot width of one of the elongated hole 7 or the locking recess 13 to be slightly smaller than the other, so as to prevent the occurrence of the rattling.

For example, if the groove width of the elongated hole 7 is set smaller than the groove width of the locking recess 13 as shown in FIG. It is pressed against both the upper and lower sides of the elongated hole 7 depending on the force. When the device is repeatedly used, the elongated hole 7 is expanded by the locking portion 8a and deformed to a size and position corresponding to the locking recess 13.

Therefore, the above-mentioned manufacturing error is absorbed, and wobbling of the leg body 3 is prevented. Note that the flange portion 6 of the leg body 3 in which the elongated hole 7 is formed is formed to have a smaller thickness than the side plate 6 of the support bracket 2 in which the locking recess 13 is formed, so that the elongated hole 7 is engaged. Since it is easier to deform than the locking recess 13, the groove width of the long hole 7 is set smaller than the groove width of the locking recess 13, so that the above-mentioned manufacturing error can be easily and reliably absorbed. This is desirable.

Further, as in the third embodiment shown in FIGS. 14 to 16, a movable bar 8 supported by the upper end 7 of the leg 3 and the flange 6
operating lever 20 for separating the locking recess 13.14
may be supported by the connecting bar 21 on the support bracket 2 in which the locking recesses 13 and 14 are formed. In this way, even when the operating lever 20 is provided on a member in which the locking recesses 13. 8 can be pushed outward to easily separate the locking part 8a from the locking recess 13.14.

Further, as shown in FIG. 17, a mounting hole 22 is formed on the outer surface of the upper end of the leg body 3, and a locking portion 24 of a buffer member 23 made of synthetic rubber or the like is inserted into the mounting hole 22. By attaching it to the leg 3, as shown in Fig. 18,
When stacking tables with legs 3 folded,
It may be configured to prevent damage to the top plate 1 due to the legs 3 of the upper table B coming into direct contact with the top plate 1 of the lower table A. When the outer surface of the buffer member 23 is formed into a tapered shape so that the thickness of the side end portion is increased, only the side end portion of the buffer member 23 contacts the top plate 1 of the table A below. Therefore, the weight of the upper table B acts on the side end portions of the legs 3 reinforced by the flange portions 5.6. Therefore, there is an advantage that the deformation of the leg 3 due to the weight of the table B acting on the middle of the leg 3 without a reinforcing member can be effectively prevented.

[Advantageous Effects of the Invention 1] As explained above, the present invention forms a locking recess for locking the leg in an upright state on the support bracket or the leg that rotatably supports the leg; A locking part that is removably engaged with the locking recess in the upright state is supported by the leg or the support bracket, and the locking part is engaged with the locking recess between the leg and the support bracket. A biasing member is provided in the direction of disengaging the locking portion, and the locking portions supported by opposing legs are integrally connected by the operating portion, so that by operating the operating portion in the direction of disengaging the locking portion, The engaged state of the interlocking portions can be simultaneously released. Moreover, since the opposing legs are connected together by a connecting member, for example, when one leg is moved from an upright state to a folded state, the other leg will also be folded at the same time. The folding and standing operations of the legs can be easily performed, and even if the locking function of one of the locking parts that locks both legs in the upright state is impaired, the locking of the other leg can be easily performed. As long as the locking function of the legs is not impaired, both legs can be maintained in an upright state via the connecting member, and the advantage is that the entire product, such as a table, to which the legs are attached can be prevented from becoming unusable. There is.

Further, a locking recess for locking the leg in a folded state is formed in the member in which a locking recess for locking the leg in an upright state is formed, and the locking recess is engaged in the locking recess. This makes it possible to stably maintain the folded state of the legs.

Furthermore, by providing an operating lever for separating the locking portion from the locking recess between the member in which the locking portion is supported and the member in which the locking recess is formed, the operation lever can be operated. Accordingly, the locking portions of the opposing legs can be easily and accurately separated from the locking recesses.

In addition, a locking recess for locking the leg in an upright state and an elongated hole for movably supporting the locking portion that is removably engaged with the locking recess are arranged so that the groove width at the inner end is If the diameter of the locking recess and the inner end of the elongated hole is smaller than the diameter of the locking part, the locking recess and elongated hole may have a smaller diameter than the locking part. There is an advantage in that the part can be moved smoothly and easily separated from the locking recess and the elongated hole, and the leg can be prevented from wobbling in the erected state.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the first embodiment of the present invention, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. 3 is a sectional view taken along the line ■-■ in FIG. FIG. 5 is a sectional view showing the folding operation of the legs in the first embodiment, and FIG. 6 is a sectional view showing the folding operation of the legs in the first embodiment, and FIG.
FIG. 7 is a sectional view taken along the line VI-VI in FIG. 6, FIG. 8 is a sectional view taken along the line ■-■ in FIG. 7, and FIGS. 9 and 10 respectively show the second embodiment. 11 is a sectional view showing a modification of the long hole formed in the leg, and FIG. 12 is a sectional view showing a modification of the locking recess formed in the support bracket. 13 are cross-sectional views showing other modifications of the elongated hole and the locking recess, and FIG.
The figure is a sectional view showing the third embodiment of the present invention, FIGS. 15 and 16 are sectional views showing the folding operation of the legs in the third embodiment, and FIG. 17 shows an example in which a buffer member is provided. FIG. 18 is an exploded perspective view and a front view showing a stacked state of the tables. DESCRIPTION OF SYMBOLS 1... Top plate, 2... Support bracket, 3... Leg body, 4... Connecting member, 7... Elongated hole, 8a... Locking part, 8b... Operating part, 13.14...Locking recess, 1
6...Biasing member, 17.20...Operation lever Patent applicant Iwasaki Metal Industry Co., Ltd. Agent
Patent Attorney Etsushi Kotani Patent Attorney Chief 1) Masashi Patent Attorney Takao Ito

Claims (1)

[Scope of Claims] 1. A plurality of support brackets attached to the lower surface of a top plate, etc., legs supported by each support bracket in a freely undulating manner, and a connecting member that integrally connects the opposing legs. Equipped with
A locking recess for locking the leg in an upright state is formed in the support bracket, and a locking part is provided in the leg to be releasably engaged with the locking recess in the leg's upright state. a biasing member that urges the locking portion between the leg and the support bracket in a direction to engage the locking recess; and both locks supported by the opposing legs. and an operating lever that connects the parts together by an operating part and moves the locking part in a direction to move the locking part away from the locking recess against the biasing force of the biasing member. Leg folding device. 2. It includes a plurality of support brackets that are attached to the lower surface of a top plate, etc., legs that are supported by each of the support brackets in a freely undulating manner, and a connecting member that connects the opposing legs together;
A locking recess for locking the leg in an upright state is formed in the support bracket, and a locking part is provided in the leg to be releasably engaged with the locking recess in the leg's upright state. A biasing member is provided between the legs and the support bracket for biasing the locking portion in a direction to engage the locking recess, and both locking members supported by the opposing legs are provided. A leg folding device characterized in that a stop part is integrally connected by an operating part. 3. A locking recess for locking the leg in an upright state is formed in the leg, and a locking part that is removably engaged with the locking recess when the leg is in the upright state is formed in the support bracket. 3. The leg folding device according to claim 1, wherein the leg folding device is supported. 4. Any one of claims 1 to 3, characterized in that the member in which the locking recess for locking the leg in the upright state is formed has a locking recess for locking the leg in the folded state. The leg folding device described in Crab. 5. A locking recess that locks the leg in an upright position and an elongated hole that movably supports the locking portion that is removably engaged with the locking recess are connected to the groove width at the inner end. 5. The locking recess and the elongated hole are formed in a tapered shape so that the locking recess and the elongated hole have a smaller diameter than the locking portion. The leg folding device described in .