JPH0759631A - Chair with elbow pads - Google Patents

Abstract

(57) [Summary] [Purpose] To enable easy and appropriate adjustment of the distance between the left and right elbow pads in a chair according to the physique of a person. [Structure] The left and right elbow pads 4 are interlockingly connected by an interlocking mechanism such as a rack and a pinion, and both elbow pads 4 are simultaneously moved and adjusted by a manual operation means 17. Alternatively, the elbow pads 4 are interlockingly connected so as to move simultaneously at a distance, while the seat body 2 is configured to move down or tilt backward in proportion to the weight of a person. Both elbow pads 4 are moved simultaneously according to the amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a chair in which elbow pads are provided on both left and right sides of a seat so that the distance between the left and right elbow pads can be adjusted.

[0002]

2. Description of the Related Art In a chair equipped with elbow pads, the left and right elbow pads are slidably mounted on the lower surface of the seat, and the left and right elbow pads are fixed at arbitrary positions by bolts. It is considered that the
No. 11329, and Japanese Utility Model Publication No. 53-13607).

[0003]

[Problems to be Solved by the Invention] When the elbow pads are configured to be movable left and right as described above, the space between the left and right elbow pads is widened when a large person sits on the chair, and the left and right sides are arranged when a small person sits on the chair. You can adjust the distance between the left and right elbow pads according to the physical constitution of the person by saying that the space between both elbow pads is narrowed.
There is an advantage that it is possible to give appropriate sitting comfort to people of different physiques.

[0004] However, in the prior art, the left and right elbow pads are individually moved and adjusted by loosening or tightening the bolts with a wrench, and therefore the operation of moving and adjusting the elbow pads is not only time-consuming. Since the distance from the abdomen of a person to both left and right elbow pads tends to be unbalanced and positioning of the left and right elbow pads also takes time, there is a problem that adjustment work is troublesome.

The present invention aims to solve this problem.

[0006]

In order to achieve this object, according to a first aspect of the present invention, there is provided a chair comprising elbow pads provided on both left and right sides of a seat so as to be movable left and right. At the same time, the lower surface of the seat body is interlockingly connected so as to be moved in the perspective direction at the same time, and further, the operation means for performing the perspective movement operation of the left and right elbow pads is provided at the lower surface portion of the seat body.

Further, according to a second aspect of the present invention, in a chair comprising elbow pads provided on both left and right sides of the seat body so as to be movable left and right, the left and right elbow pads are simultaneously moved in a perspective manner. On the other hand, the seat body is attached to a support frame provided at the upper end of the leg body so as to descend or tilt backward by an amount proportional to the magnitude of the downward load on the seat body. An interlocking mechanism for separating the left and right elbow pads from each other by the amount proportional to the descending amount or the rearward tilting amount of the seat is provided between the above and the left and right elbow pads.

[0008]

According to the structure of the present invention, the left and right elbow pads can be moved in a perspective manner by operating the operating means, and the operating means can be operated while sitting on the chair. With the help of being able to quickly grasp the appropriate distance between the elbow pads and the fact that both left and right elbow pads move by the same amount and the left and right elbow pads are automatically positioned, Adjustment of the contact interval can be performed extremely easily.

According to the second aspect of the invention, the distance between the left and right elbow pads increases in proportion to the weight of the person sitting on the chair. In this case, since a large person has a heavy weight and a small person has a light weight, the interval between the left and right elbow pads automatically expands according to the size of the person's physique. Therefore, claim 2
With this configuration, the distance between the left and right elbow pads can be adjusted according to the physical constitution of the person without any trouble, and the usability of the chair can be significantly improved.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. 1 to 7 show a first embodiment corresponding to claim 1, and the entire structure of the chair in this embodiment is the same as the conventional one, and the seat body 2 supported by the pedestal 1 and the backrest. Three
And a pair of left and right elbow pads 4. Backrest 3
Is attached to a back frame 5 that is L-shaped in a side view and integrally formed on both left and right side surfaces of the seat body 2 so as to be tiltable rearward, and the seat body 2 is an upward opening fixed to the upper end of the pedestal 1. It is fixed to the U-shaped support frame 6.

The left and right elbow pads 4 are provided on a support rod 7 which is L-shaped when viewed from the front, and a horizontal portion 7a of the support rod 7 is provided with a guide portion 8 projecting downward from the back frame 5 and the support. The guide bush 9 fitted to the side plate of the frame 6 is slidably inserted in the left and right directions. The support rod 7 is formed in a rectangular cross section so that it cannot rotate back and forth, and an appropriate range near the tip of the horizontal portion 7a of the support rod 7 in plan view is thin.
By forming it in b, a gap in an appropriate range is formed between the side surfaces of the both thin wall portions 7b, and rack teeth 10 are formed on the opposite side surfaces of both thin wall portions 7b.
The first gear 12 provided on the interlocking shaft 11 extending vertically.
Mesh.

The interlocking shaft 11 is horizontally rotatably supported by bearings 14 and 15 between the lower surface of the seat body 2 and a bracket 13 fixed to the bottom plate of the supporting frame 6.
A second gear 16 having a diameter larger than that of the first gear 12 is provided below the gear 12, while an operating rod 17 with a photographing 17a is provided between the left and right side plates of the support frame 6 as an example of operating means. A worm gear 18 rotatably supported and provided on the operation rod 17 is connected to the second gear 16 of the interlocking shaft 11.
Mesh with.

In the above structure, when the operation rod 17 is rotated, the two support rods 7 are moved toward and away from each other by the same size via the interlocking shaft 11, and the distance between the left and right elbow pads 4 can be adjusted. Alternatively, the lower end of the interlocking shaft 11 may be projected to the outside of the support frame 6, and a projection may be provided on this projecting portion to directly rotate the interlocking shaft 11. 7 to 11
Shown in FIG. 2 is a second embodiment corresponding to claim 1. In this embodiment, a bracket 20 having a downward U-shape in a side view and provided on the lower surfaces of the left and right side portions of the seat body 2 supports the left and right elbow pads 4. Each rod 7 is pivotally attached by a pin 21 so as to be rotatable left and right,
Between the tips of the horizontal portions 7a of the left and right support rods 7,
Pins 23 that extend horizontally at both ends of the link rod 22
And the pin holes 24 in both support rods 7 are formed as long holes extending in the left-right direction.
The elbow pads 4 are configured so as to move far and near each other by the vertical movement of 2. The side plate of the support frame 6 is provided with a hole 25 for allowing the support rod 7 to rotate.

Then, a screw shaft 26 extending in the vertical direction is screwed into the link rod 22, and the screw shaft 26 is mounted between the bracket 13 provided on the support frame 6 and the seat body 2 by the bearing 1
A worm gear 18 of the operating rod 17 is meshed with a gear 27 provided on the screw shaft 26 so as to be rotatably supported by the vertical shafts 4 and 15 without being vertically movable. In the second embodiment, when the operation rod 17 is rotated, the link rod 22 moves up and down in association with the rotation of the screw shaft 26, whereby the support rod 7 rotates and the left and right elbow pads 4 approach each other. Do or leave.

FIGS. 12 to 16 show a third embodiment corresponding to the second aspect. In this embodiment, the seat frame 2 is provided at four front, rear, left and right portions of the support frame 6 on the left and right sides. Guide plates 29 extending downward along both outer side surfaces are fixed, and guide shafts 31 mounted on both left and right side plates of the support frame 6 are fitted into vertically elongated slots 30 formed in each guide plate 29. Thus, the seat body 2 is attached to the support frame 6 so as to be vertically movable.

Further, by inserting a spring 33 for applying a feeling of weight between the bracket 32 bent and formed on the upper edge of the support frame 6 and the seat body 2, the seat body 2 can be seated by a person sitting on a chair. It is designed to move downward by an amount proportional to the weight. Further, the horizontal portion 7a of the support rod 7 of the elbow pad 4 is slidably fitted into the guide tube 34 having a square cross section mounted between the left and right side plates of the support frame 6, and the horizontal portions of the left and right support rods 7 are An appropriate range near the tip of 7a is formed in each of thin-walled portions 7b so as to overlap each other in a plan view with gaps at appropriate vertical intervals, and racks are formed on the opposing surfaces of the thin-walled portions 7b of both support rods 7. Tooth 10 is formed.

The thin-walled portions 7a of both supporting rods 7 of the elbow pad 4 are sandwiched between a pair of front and rear support plates 35 mounted between the left and right side plates of the support frame 6 on both sides of the guide cylinder 34. A front and rear long first interlocking shaft 36 having a first gear 12 that meshes with the rack teeth 10 of the above is rotatably mounted, and a second gear 16 is provided at the rear portion of the first interlocking shaft 36,
Between the support plate 35 and the rear plate of the support frame 6, the second longitudinal
The interlocking shaft 37 is rotatably mounted, and the second interlocking shaft 37
Is provided with a large-diameter third gear 38 and a small-diameter fourth gear 39 that mesh with the second gear 16, and the fourth gear 39 has a seat 2
The rack body 39 projecting downward from the lower surface of is engaged.

In the above structure, when a person sits on the chair, the seat 2 descends against the spring 33, and the second interlocking shaft 37 and the first interlocking shaft 36 interlock with the descending motion of the seat 2. By rotating, the left and right support rods 7 move outward by the same size. In this case, the amount of lowering of the seat body 2 and the amount of outward movement of the elbow rest 4 increase in proportion to the weight of the person sitting on the chair, but generally, a large person has a heavy weight and a small person. Since a person is light in weight, the distance between the elbow pads 4 can be changed according to the size of the physique of the person sitting on the chair.

The second interlocking shaft 37 is provided in the third embodiment in order to transmit the descending amount of the seat body 2 to the lateral movement of the elbow rest 4 in an amplified state. 36
It goes without saying that the rack may be directly rotated by the rack body 39. In the fourth embodiment conceptually shown in FIG. 17, when the support rod 7 is moved by the vertical and longitudinal interlocking shafts 11 as in the first embodiment, the seat body 2
The left and right drive shafts 41 are rotated by the rack body 39 projecting downward from the lower surface of the drive shaft 41, and the rotation of the drive shaft 41 is transmitted to the rotation of the interlocking shaft 11 via the rack rod 42. .

The fifth embodiment conceptually shown in FIG. 18 is the second embodiment.
Similar to the embodiment, when the link rod 22 is moved up and down to move the elbow rest 4 in the distance, the link rod 22 is rotated by the downward movement of the seat body 2 through the lever rod 43. It is designed to move up and down. Third to fifth
In the case where the elbow rest is automatically moved and adjusted according to the weight of the person as in the example, the lowering movement of the seat is not limited to the movement of the elbow rest, and the seat depends on the weight of the person. The elbow pads may be configured to be tilted backward, and the elbow pads may be moved in proportion to the magnitude of the tilt angle. Further, the interlocking mechanism is not limited to the embodiment, and various other types may be used. It goes without saying that the structure can be adopted.

[Brief description of drawings]

FIG. 1 is a perspective view of a chair.

FIG. 2 is a schematic perspective view showing a main part of the first embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG.

5 is a cross-sectional view taken along line VV of FIG.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a vertical sectional front view of a second embodiment.

FIG. 8 is an enlarged view of a main part of FIG.

9 is a sectional view taken along line IX-IX in FIG. 7.

10 is a sectional view taken along line XX of FIG.

11 is a XI-XI view of FIG. 7.

FIG. 12 is a perspective view showing a main part of the third embodiment.

FIG. 13 is a plan view showing a seat body in phantom lines in the third embodiment.

FIG. 14 is a partial perspective view showing a relationship between a support frame and a seat body.

15 is a sectional view taken along line XV-XV of FIG.

16 is a sectional view taken along line XVI-XVI of FIG.

FIG. 17 is a diagram conceptually showing a fourth embodiment.

FIG. 18 is a diagram conceptually showing a fifth embodiment.

[Explanation of symbols]

 1 Leg 2 Seat 4 Elbow Pad 6 Support Frame 7 Elbow Pad Support Rod 10 Rack Teeth 11 Interlocking Shaft 12, 16 Gear 17 Operating Rod 18 Worm Gear 22 Link Rod 26 Screw Shaft 29 Guide Plate 31 Guide Shaft 33 Spring 31, 37 Interlocking axis

Claims (2)

[Claims] 1. A chair comprising elbow pads provided on both left and right sides of a seat body so as to be movable left and right, and the left and right elbow pads are interlockingly connected to each other at a lower surface portion of the seat body so as to move simultaneously. A chair with an elbow pad, further comprising operating means for moving the left and right elbow pads in a far and near position at a position on the lower surface of the seat body. 2. A chair comprising elbow pads provided on both left and right sides of the seat body so as to be movable left and right, the left and right elbow pads being interlockingly connected to each other at a lower surface portion of the seat body so as to move simultaneously. On the other hand, the seat body is attached to a support frame provided on the upper ends of the legs so as to descend or tilt backward by an amount proportional to the magnitude of the downward load on the seat body. A chair with an elbow pad, which is provided with an interlocking mechanism that separates the left and right elbow pads by an amount proportional to a descending amount or a rearward leaning amount of the seat between the pad connecting portion.