JPH0716644U - Chair stand - Google Patents

Abstract

(57) [Summary] [Object] To provide a chair mounting table that allows the facing surfaces of a fixed plate and a rotating plate to have low hardness and rigidity and can be quietly rotated. [Structure] A fixed plate 9 and a rotary plate 10 are rotatably connected around a vertical axis L. Plastic cylindrical roller 11 ...
Are radially arranged around the vertical axis L on the retainer plate 12. The retainer plate 12 and the rollers 11 are interposed between the fixed plate 9 and the rotary plate 10. Chair fixtures 22 and 22 that attach the lower part of the chair to the upper surface of the rotating plate 10 detachably
Is provided. The facing surfaces of the fixed plate 9 and the rotary plate 10 are formed by copper metal plates 16 and 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a chair mounting table.

[0002]

[Prior art]

 Since the chair is constructed so that the seat part can be moved up and down so that an old person can easily sit and stand up, the chair is too heavy to be able to change its orientation when placed on the floor surface. Therefore, conventionally, the chair as described above is provided with a fixed plate fixedly placed on the floor surface, and a rotary plate rotatably mounted on the chair around a vertical axis center via a metal spherical body. The chair was placed on the existing chair stand so that the chair could be easily turned.

[0003]

[Problems to be solved by the device]

 However, in the conventional mounting table as described above, since the metal sphere hits the fixed plate and the rotating plate, the hardness of the contact surface is required. Therefore, there is a problem that a thick and hard metal plate must be used for the fixed plate and the rotary plate.

In addition, when the chair on the mounting table is rotated, since the metal sphere rolls with respect to the metal plate, there is a problem that a noise is generated.

Therefore, an object of the present invention is to solve the above-mentioned problems, and to provide a chair mounting table in which the fixed plate and the rotating plate may have low hardness and can be quietly rotated. .

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a chair mounting table according to the present invention comprises a lower fixed plate and an upper chair mounting rotary plate which are rotatably connected to each other about a vertical axis and which are made of a plastic circle. A plurality of columnar rollers are radially arranged around the vertical axis with a retainer plate, and the retainer plate and the rollers are interposed between the fixed plate and the rotating plate. is there.

It is also preferable to provide a chair fixing tool that detachably fixes the lower part of the chair to the upper surface of the rotating plate.

It is also preferable that the lower part of the chair is provided with a chair placement positioning means for placing and positioning the lower part of the chair.

[0009]

[Action]

 The surface of the plastic cylindrical roller that contacts the rotating plate and the fixed plate is a strip-shaped surface of a minute width parallel to the axial direction on the outer peripheral surface of the roller, so the contact area is relatively large.

Further, since the rollers are made of plastic, no annoying sound such as rubbing of metal is generated during rotation.

[0011]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 4 shows a use state of the chair mounting table according to the present invention, and the chair mounting table 1 can easily change the direction of the chair 2 configured so that an elderly person or a sick person can easily sit and stand up. Thus, it is for rotatably supporting about the vertical axis.

The chair 2 includes a chair body supporting portion 3 placed upright on the chair placing table 1, and leg portions 8 and 8 attached to the left and right portions of the lower end of the supporting portion 3 so as to project forward. And a chair body 7 which is provided with a seat portion 4, a back portion 5, and arm portions 6 and 6 and which is attached to the chair body supporting portion 3 so as to be movable up and down electrically.

Therefore, as shown in FIGS. 1 and 2, the chair mounting table 1 includes a lower horizontal and square fixing plate 9 and an upper horizontal and square chair mounting rotating plate 10. , A plastic cylindrical roller 11 and a retainer plate 12 which are interposed between the fixed plate 9 and the rotary plate 10.

The fixed plate 9 and the rotary plate 10 are rotatably connected around a vertical axis L. Specifically, a bolt member 13 is fixed to the center of the fixed plate 9 as an upward protruding shape, and the bolt member 13 is inserted into a hole penetrating the center of the rotary plate 10 and is attached to the upper surface side of the rotary plate 10. Then, the nut member 14 is screwed into the bolt member 13.

Further, a plurality of plastic cylindrical rollers 11, ... Are radially arranged around the vertical axis L by the retainer plate 12. The retainer plate 12 is formed of a circular metal plate, and is rotatably supported by a bolt member 13 about a vertical axis L.

As shown in FIG. 3, the plastic cylindrical roller 11 is rotatably attached to a rectangular plastic frame body 30 in plan view via a shaft member 31. The frame body 30 is composed of a rectangular frame portion 33 and an outer flange portion 32 which is provided at a lower end portion of the frame portion 33 so as to project horizontally outward. On the side surface of the rectangular frame portion 33, a claw portion 39 for preventing the retainer plate 12 from coming off is provided.

The retainer plate 12 has mounting holes 34 near the outer edge. The inner dimension of the mounting hole 34 is set to be substantially the same as the outer dimension of the rectangular frame 33 of the frame 30 in plan view. Further, the mounting hole 34 is formed with notches 35, 35 for positioning the shaft member 31.

Then, the rectangular frame portion 33 of the frame body 30 is press-fitted into the mounting hole portion 34 of the retainer plate 12 from below, and the roller 11 is attached to the retainer plate 12.

With the above configuration, the rotary plate 10 and the retainer plate 12 can be separated from the fixed plate 9 by removing the nut member 14 on the upper surface side of the rotary plate 10 (see FIG. 1). Furthermore, by knocking the plastic frame 30 downward against the retainer plate 12, the core 11 can be easily removed and the roller 11 can be easily replaced (see FIG. 3).

Returning to FIGS. 1 and 2, the fixing plate 9 is composed of a lower surface side substrate 15 and a thin copper metal plate 16 attached to the upper surface side of the substrate 15. The metal plate 16 has a circular shape in a plan view. The metal plate 16 may be made of metal other than copper.

A stopper member 17 that prevents the rotary plate 10 from rotating more than one rotation is fixed to one portion of the outer edge of the metal plate 16 of the fixed plate 9. That is, the lower end portion of the stopper protruding member 18 fixed to the rotary plate 10 comes into contact with the stopper member 17 to prevent the rotary plate 10 from rotating.

The stopper protruding member 18 includes a guide member 28 fixed to the outer edge of the rotary plate 10 and a vertical knob with a lower end protruding downwardly inserted into the guide member 28 so as to be vertically movable. It consists of rod 29 and.

Further, the stopper holes 21 into which the lower ends of the vertical rods 29 with knobs of the stopper protruding members 18 are removably inserted at a plurality of positions on the outer edge of the metal plate 16 of the fixed plate 9. Is provided.

Further, three stopper holes 21 are provided at a pitch of about 90 ° with the center of the fixed plate 9 as the center. As a result, the rotating plate 10 and the chair 2 placed thereon can be stopped about every 90 °.

It is also preferable to provide the stopper holes 21 ... At a plurality of four or more locations. By doing so, the rotary plate 10 can be stopped at every angle smaller than 90 °.

The rotating plate 10 is composed of a substrate 19 and a thin copper metal plate 20 attached to the lower surface side of the substrate 19.

Further, this chair mounting table has a chair mounting position locating means 26 for mounting the lower part of the chair 2 to determine the position (see FIG. 2). The chair placing / positioning means 26 detachably attaches the lower part of the chair 2 to the upper surface of the rotating plate 10 and the chair fixtures 22 and 22 and the chair fixtures 22 and 22 which project from the chair fixtures 22 and 22 in the longitudinal direction in the left-right direction. And the ridges 27 that are provided.

The chair fixing member 22 includes a fixing metal fitting 24 having an arch-shaped pressing piece 23 that presses the upper half of the leg portion 8 of the chair 2 downward, and an upper and lower part that is provided through the base of the fixing metal fitting 24. And a knob screw 25 that is inserted from above into the hole in the direction and that is screwed into a screw hole that opens on the upper surface of the rotating plate 10 so as to be able to move forward and backward (see FIG. 1).

Further, as shown in FIG. 4, when the chair 2 is positioned, the ridges 27 and the chair fixing members 22, 22 of the chair placing and positioning means 26 balance the chair 2 on the rotating plate 10. It is provided at a position where it can be placed.

Then, the lower front end edge of the chair body supporting portion 3 of the chair 2 is brought into contact with the rear edge of the ridge 27, and the legs 8 of the chair 2 are fixed to the chair fixing members 22, 22. The chair 2 can be positioned by arranging it under the pressing pieces 23, 23.

Further, by tightening the knob screws 25 of the chair fixtures 22, 22, the legs 8, 8 (that is, the chair 2) can be fixed on the rotating plate 10 (see FIGS. 1 and 4). .

Next, FIG. 5 shows a modified example of the chair fixtures 22, 22. This chair fixture 22 has a rear opening hole into which the tip end of the leg portion 8 of the chair 2 is removably inserted. It comprises a block-shaped member 37 having a portion 36, and a knob screw 38 which is screwed into a screw hole which is opened from the upper surface of the block-shaped member 37 so as to communicate with the internal hole portion 36, and which can be screwed back and forth.

Then, the chair 2 can be fixed on the rotating plate 10 by inserting the leg portion 8 of the chair 2 into the rear opening hole portion 36 of the block member 37 and tightening the knob screw 38. .

FIG. 6 shows another embodiment of the chair placing table of the present invention. In this case, the chair placing positioning means 26 inserts the tip end of the leg portion 8 of the chair 2 in a removable manner. It comprises a locking portion 41 having a hole 40, and a ridge portion 42 that abuts on the lower rear edge of the chair body supporting portion 3 of the chair 2.

Then, the chair 2 is rotated on the illustrated rotating plate 10 by placing the chair 2 as shown by the arrow A and inserting the tip of the leg 8 into the hole 40 of the locking portion 41. Can be fixed on board 10. Further, if the chair 2 is pulled in the direction opposite to the arrow A, the chair 2 can be removed from the rotating plate 10.

The present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the gist of the present invention. For example, in FIG. Although only one line is formed as one horizontal line, it is also possible to form two lines by dividing it horizontally. Instead of the ridge 27, it is also possible to provide a recess on the upper surface of the rotary plate 10 into which the bottom of the chair body supporting portion 3 of the chair 2 is fitted from above.

Further, FIG. 2 shows a case where 16 rollers 11 are radially arranged on the retainer plate 12 at predetermined center angles, and the number of rollers 11 is about 8 to 15, Alternatively, the number can be 17 to 20.

Further, although the fixed plate 9 and the rotary plate 10 are square in plan view, they may be circular in plan view.

[0040]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects.

Even when the hardness and rigidity of the facing surfaces (the metal plate 16 and the metal plate 20) of the fixed plate 9 and the rotary plate 10 are low, they are used (since the area where the plastic cylindrical rollers 11 ... It can be well tolerated. Therefore, as the material for the facing surfaces of the fixed plate 9 and the rotary plate 10, a copper plate or the like that is easily available and inexpensive can be used, and the chair mounting table can be manufactured easily and inexpensively.

Further, even if the chair 2 is rotated while the person is seated on the chair 2 fixed on the rotating plate 10, an unpleasant sound such as metal scraping may be generated (due to the material of the cylindrical cylindrical roller 11 made of plastic). Not, it can be quietly rotated.

Further, since the plastic cylindrical rollers 11 are radially arranged by the retainer plate 12, even if the fixed plate 9 and the rotary plate 10 are separated, the rollers 11 can be prevented from being dispersed. It Therefore, the fixed plate 9 and the rotary plate 10 can be separated and cleaned easily.

Further, the chair placement positioning means 26 allows the chair 2 to be placed on the rotating plate 10 quickly and in good balance. Then, the chair fixing members 22, 22 can fix the chair 2 so as not to come off from the rotating plate 10 during use.

[Brief description of drawings]

FIG. 1 is a partially cutaway rear view of an embodiment of the present invention.

FIG. 2 is a partially cutaway plan view.

FIG. 3 is an enlarged perspective view of a main part.

FIG. 4 is a perspective view showing a usage state.

FIG. 5 is a perspective view showing a modified example of the chair fixing tool.

FIG. 6 is a simplified cross-sectional side view of another embodiment of the present invention.

[Explanation of symbols]

 9 Fixing plate 10 Rotating plate 11 Plastic cylindrical roller 12 Retainer plate 22 Chair fixing tool 26 Chair mounting positioning means L Vertical axis

Claims (3)

[Scope of utility model registration request] 1. A lower fixed plate 9 and an upper chair mounting rotary plate 10 are rotatably connected around a vertical axis L, and a plurality of plastic cylindrical rollers 11 ... At 12, a radial arrangement is made around the vertical axis L, and the retainer plate 12 and the rollers 11 are interposed between the fixed plate 9 and the rotary plate 10. A chair stand to use. 2. The chair mounting table according to claim 1, further comprising chair fixing members 22, 22 for removably fixing the lower portion of the chair 2 to the upper surface of the rotating plate 10. 3. The chair mounting table according to claim 1, further comprising a chair mounting positioning means 26 for mounting the lower portion of the chair 2 to determine the position.