JPH1071044A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set the seat inclination angle in the front-rear direction most suitable for a user by pivotally attaching a leg to the front end part of a seat receiver and butting an up/down movable elevating member supported by the legs against the receiver rear part. SOLUTION: A leg 2 is pivotally attached to the front end part of a seat receiver 3. The seat receiver 3 is equipped with a support area slightly smaller than the seat 4 and a pipe frame 31 with the rear end bent into a U-shape so as to be capable of mounting a seat 4 on the seat receiver 3. A T-shaped flat auxiliary frame 33 is bridged between the rear end center of the pipe frame 31 and the rear part of the straight line part of the U-shaped frame. A receiver 7 is attached on the lower face of the auxiliary frame 33 at a position against which the upper end of a bolt 6 of an up/down movable elevating member butts. Thus, the seat inclination angle in the front-rear direction can be set most suitable for a user.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a function of adjusting a front and rear tilt angle of a seat having a backrest.

[0002]

2. Description of the Related Art A chair having a simple structure including a leg, a seat fixedly mounted on the leg, and a seat integrally provided with a backrest mounted on the seat, is inexpensive, light, and lightweight. In addition, it is used in various places because it has the convenience of being able to disassemble by removing the seat or replace the cover. In particular, since the seat can be removed and the cover can be replaced, it is often used by elderly people who easily stain the chair.

[0003]

When an elderly person sits on a chair, he or she often sits down on the front edge of the seat without using a backrest. Such a sitting posture not only imposes a burden on the internal organs but also causes a danger of falling off the chair with a slight trigger. To prevent this, the seat and backrest should be slightly tilted backwards and guided so that they can be easily seated deeply on the chair.To do so, the tilt angle of the seat back and forth can be arbitrarily set according to each user. What can be adjusted and fixed is desirable, but there has not been a chair of the above-described simple configuration having such a function.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a seat supporter in which a front end portion of a seat is pivotally mounted on a leg, and a vertically movable lifting member supported by the leg is provided on a rear portion of the seat. To be brought into contact with. With such a simple configuration, it is possible to adjust the tilt angle of the front and rear of the seat by the vertical movement of the elevating member so as to be optimal for the user.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS That is, the present invention relates to a chair comprising a leg, a seat attached to the leg, and a seat integrally having a backrest and mounted on the seat. The seat support is pivotally supported on the front end of the leg so as to be tiltable back and forth, and a portion deviated rearward from the front end is abutted against the upper end of a lifting member supported up and down by the leg. It is characterized by being supported in contact. According to such a configuration, it is possible to provide a chair having the configuration as described in the conventional example with a function of adjusting the tilt angle of the seat back and forth without making any major changes in the configuration while keeping its features. Therefore, the seat can be easily tilted backward so that the elderly can be led to a stable posture.

[0006] Further, as a simple configuration in which the tilt angle of the seat in the front and rear directions is freely adjusted and fixed at that angle, it is conceivable that the lifting member is a bolt screwed into a female screw hole vertically penetrating the leg. Can be Further, when the seat is tilted, the upper end of the elevating member and the lower surface of the seat support are rotated and slid forward and backward while abutting, but in order to perform this rotation and forward and backward sliding quietly and smoothly. Preferably, a resin seat is fixed to the lower surface of the seat receiver, and the seat and the upper end of the elevating member are preferably in contact with each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The chair according to the present embodiment includes a leg 2 and the leg 2
And a seat 4 having an integrated backrest and mounted on the seat 3. The leg 2 is composed of a pair of inverted U-shaped pipe frames 21 and a horizontal member connecting the inverted U-shaped pipe frames 21. The inverted U-shaped pipe frame 21 has one end on a front leg 21a and the other end on a rear leg 21a.
b, the intermediate portion functions as an armrest 21c, and the horizontal member is a first horizontal member 22 laid between the front legs 21a on the left and right, and each end of the first horizontal member 22 and a rear leg. 21b, a pair of second horizontal members 23 laid back and forth between the second horizontal members 23b, and a third horizontal member 24 laid right and left between the second horizontal members 23 at a substantially central portion thereof. Have been.

The first horizontal member 22 includes left and right front legs 21a.
It is erected between the vicinity of the center. This horizontal member 22
Near the both ends of the second horizontal member 23 inside the erection point,
A pair of arms 5 extending rearward are fixed. The rear end of the second horizontal member 23 extends substantially horizontally and is fixed to the rear leg 21b. The front end of the second horizontal member 23 is bent obliquely upward only at the front portion and is fixed to the vicinity of both ends of the first horizontal member 22. ing.

The third horizontal member 24 is formed of a flat pipe frame having an elliptical cross section, and a bolt supporting member 63 having a female screw hole vertically penetrating therethrough at the center thereof. It is fixed. A bolt 6 serving as an elevating member is screwed into the female screw hole.
The bolt 6 itself can be moved up and down by the forward and reverse rotation of. The third horizontal member 24 is the first horizontal member 2
2 is located below.

At the upper end of the bolt 6, a protruding piece 61 having a round disk-shaped head 61a having a constricted portion 61b is fixed, and a handle for rotating the bolt 6 is mounted at the lower end. 62 is attached. Seat 3
A pipe frame 31 which has a support area slightly smaller than the seat 4 so that the seat 4 can be mounted thereon, and which is bent into a U-shape having a curved rear edge, and a front end which is both ends of the U-shaped pipe frame 31 And a rigidly connected pipe frame 32. The pipe frame 32 is disposed between the inner surfaces of the pair of arms 5, and a shaft 51 inserted from the outside of the 5 is fitted into a center hole of the pipe frame 32, so that the seat 3 is attached to the arm 5 at its front end. It will be pivotally supported so that it can be tilted back and forth. A T-shaped flat auxiliary frame 33 is provided between the center of the rear edge of the U-shaped pipe frame 31 and the rear portion of the U-shaped straight portion. The seat 7 is attached to a portion where the upper end of the contact is in contact. Further, four flat protrusions 34 for fixing the seat having upper and lower through holes are provided inwardly from four sides of the pipe frames 31 and 32 constituting the seat support 3.

The seat 7 is formed of a tongue-shaped hollow thick plate made of resin. The rear end face is open, and the constricted portion 61b of the protruding piece 61 can be loosely fitted to a portion extending from the vicinity of the center of the lower surface to the rear end, and the diameter of the head 61a of the protruding piece 61 can be adjusted. A slit 7a having a width smaller than that of the slit 7a is formed. The seat 4 has a backrest integrally with a rear edge thereof, and has a flat protruding piece 34 on a lower surface thereof.
Four female screw holes are provided at positions corresponding to the through holes. And it is detachably fixed on the seat 3 by bolts 41.

As an example of the assembling method of this embodiment, first, a seat 3 is pivotally mounted on the leg 2. The constricted portion 61b of the bolt 6 extends from the rear end opening of the seat 7 to the slit 7
After the seat 7 is moved so as to be inserted into the seat 7 along a, the seat 7 is fixed to the lower surface of the auxiliary frame 33, and the upper end of the projecting piece 61 abuts on the ceiling inner surface of the seat 7. Let it. afterwards,
The seat 4 is fixed to the seat receiver 3 with bolts 41.

According to such a structure, as shown by the imaginary line in FIG. 3, the user turns the bolt 6 by the handle 62 from the state where the seat 4 is substantially horizontal, that is, from the normal use position. As a result, the seat 7 in contact with the upper end of the bolt 6 moves down, and the seat 3 and the seat 4 mounted on the seat 3 can be inclined rearward around the shaft 51. Then, the user can fix and seat the seat 4 at a desired angle. Of course, if the user turns the bolt 6 upward, the reverse operation is performed. As described above, the seat support 3 can be tilted back and forth between the normal use position and the rearward tilt position, as described above.
Is disposed below the first horizontal member 22, and from the pivot point 3 a of the seat 3 pivotally supported by the first horizontal member 22 via the arm 5 by the third horizontal member 24. Since the height of the supported position of the bolt 6 supported is lower than the pivot point 3a, the upper end position of the bolt 6 which is in contact with the rear part of the seat 3 at a position lower than the height of the pivot point 3a is raised and lowered. Because it can be moved. At this time, the upper end of the bolt 6 rotates while contacting the upper end of the bolt 6 and the receiving seat 7 due to the vertical movement of the bolt 6, and slides back and forth. 61a has a horizontal disk shape and its corners are rounded, so that it is difficult for the contact portion to be caught or scratched, and since the seat 7 is made of resin, the noise and friction due to sliding can be reduced. The rotation and sliding are quiet and smooth. The seat 4 can be easily removed from the seat receiver 3 by removing the bolt 41 screwed to the lower surface. Further, as described above, the slit 7
Since the width of “a” is smaller than the diameter of the head 61 a, even if the rear edge of the seat 4 is lifted, the head 61 a of the protruding piece 61 is caught by the slit 7 a and the upward movement of the seat 4 and the seat receiver 3 is suppressed. Therefore, the chair can be moved while holding the seat 4.

As described above, according to the present embodiment, a chair that is inexpensive and lightweight and has the convenience of being disassembled by detaching the seat 4 and replacing the cover can be provided without losing its features. With a simple configuration, it is possible to provide a mechanism that can arbitrarily adjust and fix the front-back tilt angle of the seat 4 according to each user. Therefore, the seat 4 can be leveled and used like a conventional chair, or the seat 4 can be tilted backward to guide the elderly to a posture that can be used safely and comfortably.

The present invention is not limited to the embodiment described above. For example, an air cylinder, an electric cylinder, or the like may be used instead of the bolt 6 serving as the elevating member. Further, the shape of the upper end of the elevating member 6 is not limited to a disk. A ball caster or the like may be attached to the upper end of the elevating member 6.
Further, the pivoting method at the front edge of the seat receiver 3 is not limited to the above-described method. For example, the shape of the arm 5 is L-shaped so that the rear end is higher than the front end, and the pivot point 3a
Can be considered to be higher, and the seat 4 can be tilted more rearward.

In addition, the configuration of each section is not limited to the illustrated example, and various modifications can be made without departing from the spirit of the present invention.

[0017]

The present invention is embodied in the form described above and has the following effects. That is, according to the present invention, the front end of the seat is pivotally attached to the leg on a chair which is inexpensive and light, and which has convenience such as dismounting the seat and disassembling and replacing the cover. The rear end of the seat is supported by the leg via a lifting member arranged at a position deviated rearward from the front end so that the leg can move up and down. It is possible to provide a mechanism for adjusting the tilt angle before and after the seat. Therefore, not only can the seat be used horizontally as in the past, but also for elderly people, the seat and backrest can be tilted slightly backward to easily lead to a posture in which the user sits deeply on the chair. In addition, a chair that does not impose a burden on the internal organs and the like can be provided at low cost.

If the lifting member is a bolt that fits into a female screw hole vertically penetrating the leg, a simple structure that does not require any special mechanism for vertical movement of the lifting member and fixing at an arbitrary position is provided. Will be possible. Further, a resin seat is fixedly provided on the lower surface of the seat support, and if the seat is in contact with the upper end of the elevating member, the upper end of the elevating member when the seat is tilted. And the receiving seat can be smoothly and quietly slid and rotated at the contact portion.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a rear view of the embodiment.

FIG. 3 is a right side view of the embodiment.

FIG. 4 is a bottom view of the embodiment.

FIG. 5 is a perspective reference view of the embodiment.

FIG. 6 is a sectional view taken along line AA in FIG. 1;

FIG. 7 is a sectional view taken along line BB in FIG. 1;

FIG. 8 is a detailed view of a portion F in FIG. 7;

[Explanation of symbols]

 2 ... frame 3 ... seat support 4 ... seat 6 ... elevating member (bolt) 7 ... seat

 ────────────────────────────────────────────────── ─── Continuation of the front page (71) Applicant 596121736 12340 Bass Lake Road, Chardon, Ohio 44024, U.S.A. A. (71) Applicant 591222278 Yamada Industries Co., Ltd. 2-4-1 Hozo-cho, Nakagawa-ku, Nagoya-shi, Aichi (72) Inventor Masaharu Koizumi 6-1-1, Oimazato-minami, Higashi-Nari-ku, Osaka 72) Inventor Koji Kondo 2037 Imao-Nishi-ku, Hirata-cho, Kaizu-gun, Gifu (72) Inventor Robert Glenn-Hur United States 44024 Ohio, Chardon, Bass Lake Road, No. 12340

Claims (3)

[Claims] 1. A chair comprising a leg, a seat attached to the leg, and a seat integrally having a backrest and mounted on the seat, wherein the seat has a front end. The leg is pivotally supported so as to be able to tilt back and forth, and a portion deviated rearward from the front end is supported in contact with the upper end of an elevating member which is vertically supported by the leg. And chair. 2. The chair according to claim 1, wherein the lifting member is a bolt fitted into a female screw hole vertically penetrating the leg. 3. The seat according to claim 1, wherein a resin seat is fixed to a lower surface of the seat receiver, and the upper end of the lifting member is slidably contacted with the seat. Or the chair described in 2.