JPH0321641Y2 - - Google Patents

Description

[Detailed explanation of the invention] A. Field of industrial application The invention relates to the improvement of a chair with a table. buffered,
To relate to a chair with a table whose position can be reliably changed and held without giving a shock when rotating.

B. Conventional technology Conventionally, there have been various chairs with tables that can be set so that the table attached to the chair can be placed on the top of the armrest when in use, and placed along the side of the chair when not in use. Although various combinations of the rotation of the It requires a strong position regulating means at the end position, and is prone to damage and wear due to the repeated impact that is applied at that time, and has difficulties in terms of maintenance management and durability. When a person changes the table, noise is generated due to the impact, which may cause discomfort.

C. Problems that the invention attempts to solve In view of the above-mentioned situation, the invention aims to solve the problem by making the rotational movement not a direct one, but a gentle rotational movement, which prevents shocks and collisions between members. Eliminates noise generation, does not cause discomfort to the user during operation, improves durability, and simplifies components.
Moreover, it is an object of the present invention to provide a chair with a table that allows the position of the table to be changed for convenient use and storage depending on whether it is in use or not.

D. Means for solving the problem In order to solve the above-mentioned problem, the present invention provides a fixing part with a hanging piece with a pivot hole provided under the armrest of the chair.
Elasticity for providing frictional resistance between the vertical movement support shaft and the hanging piece when the vertical movement support shaft of the table, which is formed by fixing the shaft support cylinder in a proper position, is rotatably inserted and supported. A biasing means is provided, and a back-and-forth rotating portion of the table, one end of which is fixed to the bottom of the table, is inserted into the shaft support cylinder of the vertically movable support shaft, and A chair with a table is constructed by providing a back-and-forth rotation stopper for regulating the position and a vertical movement stopper for regulating the position when the table is positioned on the upper surface of the armrest by rotation by the vertical movement support shaft.

E. Embodiments Next, the present invention will be further explained in detail based on embodiments shown in the accompanying drawings.

Figures 1 and 2 are representative embodiments of the present invention,
1 is a fixed part; 2 is a pivot shaft for vertically rotating the table 3 attached to the fixing part 1; 4 is fixed under the table 3 and is connected to the pivot shaft 2 to rotate the table. This is the rotating part to rotate 3 back and forth 180 degrees. Here, the fixing part 1 is attached to an armrest 5 of a general chair (not shown) consisting of a seat plate, backrest, legs, etc., for example, in the illustrated example, a pivot hole 7 is provided under a base plate 6 for fixing to the lower surface of the armrest 5. The base plate 6 of the fixing part 1 is fixed to the lower surface of the armrest 5 with screws. Main fixing part 1
The lengthwise side end of the board 6 is bent upward into an L shape, and the bent piece 9 is inserted into the long groove 10 formed in the lengthwise direction of the lower surface of the armrest 5 to fix it with screws and to prevent lateral wobbling. I am doing it.

Next, the table 3 is inserted and supported by this fixed part 1.
The vertical movement support shaft 2 of the table 3 is for rotating the table 3 up and down, that is, from the horizontal state in which it is used, to the side vertically up and down, that is, from the state in which it is used, by 90 degrees to the side.
is a single shaft that can be inserted into the shaft support hole 7 of the hanging piece 8 in the fixing part 1 as shown in the figure, and between the appropriate position of this shaft and the hanging piece 8 of the fixing part 1. In the case of the elastic biasing means 11 for applying frictional resistance when the shaft rotates, a cap 13 is fixed to one end of the shaft with a screw 12, and the cap 13 is fixed to one end of the shaft.
An elastic biasing means 11 having a spring 14 in a compressed state is provided between the inner surface of 3 and one side of the vertical piece 8, and a shaft support cylinder 15 is further fixed orthogonally to the other end of the shaft body. There is. This pivot support tube 15 has to be set so as to protrude laterally from the bottom surface of the armrest 5 when the rotation support shaft 2 is pivotally supported on the bottom surface of the armrest 5 of the chair. A fixing member 16 extends between 15 and the shaft body. In the embodiment, the shaft support tube 15 is fixed inside a substantially U-shaped fixing member 16 by welding or the like, and the free end side of the substantially U-shaped fixing member 16 is fixed to the rotation support shaft 2.
The rotation support shaft 2 and the shaft support cylinder 15 are set so that they can move together with each other. The fixing member 16 located around the rotation support shaft 2 is formed with a step 17 that engages with a back and forth rotation stopper 19, which will be described later. That is, in the upper part of FIG. 1, which is the tip side of the rotation support shaft 2, in order to obtain a 180-degree rotation state, the rotation support shaft 2 is provided with the initial and end points of rotation relative to the table 3. The two stop steps 17 to be determined
is provided. This stop step 17 is formed, for example, by processing the upper end of the approximately U-shaped fixing member 16 in the front and rear. It is set at a location corresponding to the location of . As shown in Figure 3,
The stop step 17 on the rotation support shaft 2 allows the table 3 provided with the longitudinal rotation stopper 19 to rotate 180 degrees around the longitudinal rotation portion 4. Although the substantially U-shaped fixing member 16 is provided as the stop step 17, the purpose can also be achieved by simply forming protrusions at the two positions of the pivot shaft 2. .

Next, the back-and-forth rotating part 4 of the table 3 can be inserted into the shaft support cylinder 15 of the rotation support shaft 2 and rotated, and one end thereof, in FIG. 1, the upper end is fixed to the bottom of the table 3. One board 1
8, the longitudinally rotating part 4 is fixed to the base plate 18, and a longitudinally rotating stopper 19 that engages with the step 17 of the rotating support shaft 2 is provided in parallel with the longitudinally rotating part 4, Furthermore, in the state shown in Figure 1, table 3
Another horizontal rotation stopper 20 is provided to prevent the table 3 from rotating in the horizontal direction, and in particular to prevent the table 3 from rotating towards the inside of the chair when mounted. In addition, 21 in the figure is a screw 2 to prevent it from coming off when the shaft for the front and rear rotating part 4 is inserted into the shaft support tube 15.
At 2, the stop part is fixed to the lower end of the front and back rotating part 4.
3 is a shock absorbing member of the table 3 against the armrest 5.

As shown in FIG. 1, the table 3 rotates in the direction of arrow a around the rotation support shaft 2 from the solid line state shown in FIG. Rotate in the direction of arrow b to adjust the usage state and armrest 5.
The usage status is shown. That is, when in use, the table 3 can be positioned above the armrest 5 with its surface protruding, and when not in use, the table 3 can be positioned hanging down behind the side of the armrest 5.

F. Effects of the invention According to the chair with table of the invention as described above, there is provided a fixing part formed by opposing vertical pieces provided with a pivot hole under the base plate for fixing to the armrest of the chair, and A shaft body is inserted and supported through the shaft support hole of the vertical piece of the shaft, and a spring is inserted in a compressed state between the inner surface of the cap fixed to one end of the shaft body and the vertical piece, thereby providing frictional resistance. In addition to providing an elastic biasing means, a shaft support tube fixed inside a U-shaped fixed member is fixed at the other end so as to be orthogonal to the eccentric position, and two A vertically movable support shaft of the table forming a stop step, and a table longitudinally rotating portion having one end fixed under the table and rotatably attached by being inserted into the shaft support cylinder of the rotary support shaft. And, before and after the table is rotated 180 degrees by the fore-and-aft rotating section,
A back-and-forth rotation stopper provided at a position on the bottom surface of the table that can abut on the stop step, and a stopper that abuts on the outside of the armrest to prevent inward horizontal rotation when the table is placed on the upper surface of the armrest. It consists of a horizontal rotation stopper provided at a position on the bottom surface of the table to regulate it, and an impact buffer member provided on the bottom surface of the table that can come into contact with the top surface when the table is placed on the top surface of the armrest. Using the shaft, the table can be rotated vertically to the upper surface of the armrest, that is, vertically at 90 degrees; In addition to being able to rotate, the table of the present invention reduces the frictional resistance provided between the rotation support shaft and the fixed part in vertical movement in the horizontal state and in the lateral vertical and vertical states of the armrest. The table is cushioned by an elastic biasing means, which eliminates the shock caused by sudden rotations or normal rotations, and the shock-absorbing member provided on the bottom surface of the base plate of the front-rear rotation section allows the table to be held against the top surface of the armrest. It is possible to improve the durability of the component and eliminate unpleasant collision noise by eliminating the impact when placed on the shaft, and the shaft support tube is simply fixed at the appropriate position of one rotation shaft, for example, at one end. Therefore, simply insert this shaft into the hanging piece of the fixed part and attach the elastic biasing means.
The table can be easily fixed to the armrest. Furthermore, due to the friction caused by the back-and-forth rotation stopper that is in contact with the stop step, the horizontal rotation stopper that is in contact with the outside of the armrest, and the impact buffer member that comes into contact with the upper surface of the armrest, the above-mentioned back-and-forth rotation and horizontal rotation are prevented. Each predetermined position of the accompanying table can be accurately and reliably positioned. Furthermore, when a table is in use, that is, in a horizontal state, when writing, for example, there is a possibility that vertical vibrations may occur due to the pressure of the pen, which may make writing work difficult. In this case, a spring is inserted in a compressed state between the inner surface of the cap fixed to one end of the pivot shaft, which is rotatably supported by a fixed part fixed to the underside of the armrest, and the hanging piece of the fixed part. By providing the elastic biasing means to provide a frictional resistance, vertical vibration of the table can be suppressed and the table can be stably stopped. Furthermore, since the elastic biasing means is provided on the shaft of the pivot shaft arranged parallel to the length direction of the armrest, the means does not protrude from below or from the sides of the armrest. There is no risk of the user accidentally touching it and getting hurt by the springs, etc., and since there are few protruding parts, it can be configured compactly in terms of appearance.
Moreover, the number of parts can be reduced, and costs can be reduced.

[Brief explanation of drawings]

Figure 1 shows a book table attached to the armrest of a chair.
Fig. 2 is an exploded perspective view of each part disassembled, and Fig. 3 is an explanatory perspective view of the table in use, that is, when it is positioned horizontally, as seen from the lower outer surface. FIG. 3 is an explanatory perspective view illustrating the positional relationship between the stepped portion and the stopper provided under the table. 1: Fixed part, 2: Rotating shaft, 3: Table,
4: Back and forth rotation part, 5: Armrest, 6: Substrate, 7: Pivot hole, 8: Vertical piece, 9: Bent piece, 10: Long groove, 1
1: Elastic biasing means, 12: Screw, 13: Cap, 14: Spring, 15: Axial support cylinder, 16: Fixing member, 17: Stopping step, 18: Board, 19: Back and forth rotation stopper, 20: Horizontal Rotating stopper, 2
1: Stop portion, 22: Screw, 23: Impact buffer member.

Claims (1)

[Scope of Claim for Utility Model Registration] A fixing part consisting of vertical pieces with pivot holes provided under the substrate for fixing to the armrest of a chair, and a shaft in the pivot holes of the hanging pieces of the fixing part. A spring is inserted in a compressed state between the inner surface of the cap fixed to one end of the shaft body and the above-mentioned hanging piece to provide elastic biasing means for providing frictional resistance. In this table, a shaft support cylinder fixed inside a U-shaped fixed member is fixed perpendicularly to the eccentric position, and two stopper steps are formed on the fixed member located around the shaft support cylinder. a vertically movable support shaft; a table longitudinally rotating portion having one end fixed under the table and rotatably mounted by being inserted into the shaft support cylinder of the rotary support shaft; A back-and-forth rotation stopper provided at a position on the bottom surface of the table that can abut the stop step part when rotating 180 degrees, and a back and forth rotation stopper that abuts on the outside of the armrest and rotates inside when the table is placed on the upper surface of the armrest. a horizontal rotation stopper provided at a position on the bottom surface of the table to restrict horizontal rotation in the direction; and a shock absorbing member provided at a position on the bottom surface of the table that can come into contact with the top surface when the table is placed on the top surface of the armrest. , more tables and chairs.