JP3666530B2 - Chair - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an improvement of a chair in which a seat body is configured to be adjustable in height.
[0002]
[Prior art]
Child chairs generally allow the height of the seat to be adjusted as the body grows. As an example, the following structure is described in Japanese Utility Model Publication No. 63-48212 as a prior art.
That is, in this prior art, the upper ends of the left and right leg bodies arranged on the left and right sides of the seat body are connected by a backrest, and the inner side surface of the part where the seat body is attached to the left and right leg bodies is tilted rearward in a side view. An extending inclined guide groove is formed, and a guide block that is slidable along the inclined guide groove is fixed to the lower ends of the pair of left and right support brackets that protrude downward from the seat body. Among them, a plurality of adjustment holes are formed at appropriate intervals in the vertical guide groove portion, and screws inserted from the outside into the adjustment holes are screwed to the support bracket in a state of passing through the guide blocks. Thus, the height of the seat body can be adjusted stepwise by the number of adjustment holes.
[0003]
According to this prior art, since the seat body descends along the guide groove that is inclined rearward when viewed from the side, the height of the seat body and the amount of forward protrusion can be reduced by a simple operation of fastening one by one from the left and right sides. Can be adjusted simultaneously.
[0004]
[Problems to be solved by the invention]
However, in this type of chair, there is no so-called chair that can be tilted backward so that when the load of a seated person acts on the rear part of the seat, the rear part of the seat tilts downward. It was. In addition, in this type of conventional chair, in order to provide so-called cushioning performance, a cushion body such as a sponge must be placed on the seat body itself, and the seat body is elastic according to the magnitude of human load. There was no thing that gave the function of deviating.
[0005]
It is an object of the present invention to provide a chair that does not impair the ease of moving the seat body and solves the problems of the conventional techniques.
[0006]
[Means for Solving the Problems]
In order to achieve this object, a chair according to the first aspect of the present invention includes a pair of left and right legs that are parallel to each other, and a seat that is disposed between the left and right legs, and is provided between the left and right legs. The support bracket is arranged such that an elastic support formed in a substantially U shape in a side view is pivotally supported around its lower end and protrudes downward from the seat. Is fixed to the elastic support member through attachment means that can slide and change its fixed position along the inclined surface of the front lower side, and is attached to the left and right leg bodies at appropriate intervals. The left and right sides of the seat body are pivotally supported through holes so that the height position can be adjusted and the vehicle can be tilted backward.
[0007]
The invention according to claim 2 is the chair according to claim 1, wherein the elastic support is configured by a pair of left and right pipes made of metal or the like, and both pipes are substantially in the shape of a letter in side view. The upper ends of both pipes are integrally connected at the connecting portion, and the upper side of the pair of left and right pipes is provided with a lower end of the support bracket along the front inclined surface. A sliding support plate that supports the slidable member is fixed.
[0008]
Furthermore, the invention according to claim 3 is the chair according to claim 1 or 2, wherein the sliding support plate is formed with a vertically long guide groove hole and inserted into the guide groove hole. The lower end plate part of the support bracket is slidably connected via a bracket.
[0009]
[Operation and effect of the invention]
In this configuration, the support bracket projecting downward from the seat body is fixed to the elastic support body through mounting means that can slide and change its fixed position along the inclined surface of the front downward direction. It is possible to adjust the height of the seat body and the position change of the front and rear at the same time. Then, due to the load of the person sitting on the seat, the elastic support body in the shape of a side view is elastically deformed so as to rotate around its lower end, and at this time, the left and right side portions of the seat body are left and right legs. Since the height position can be adjusted and the vehicle can be tilted rearwardly through mounting holes drilled at appropriate intervals, the seat is centered on the pivotal portion of the left and right legs and the seat. The body will tilt backwards.
[0010]
Thus, the seat body is stable because it is supported on the left and right sides by the elastic support body and the left and right leg bodies, respectively, at two positions in the front and rear, and the elastic support body is stable in height and front and back. Both the fixing at the time of changing the position and the elastic support of the seat body can be achieved, and the structure for that purpose can be made extremely simple.
[0011]
According to a second aspect of the present invention, the elastic support is composed of a pair of left and right pipes made of metal or the like, both pipes are formed in a substantially square shape in side view, and both pipes The upper ends of the support brackets are integrally connected by a connecting portion, and the lower ends of the support brackets are slidably supported on the upper side of the pair of left and right pipes along the front-falling inclined surface. A sliding support plate is fixed. In other words, by configuring the elastic support with a pipe bent in a letter-like shape when viewed from the side, the weight is light and the cross-sectional shape is compact, but the rigidity can be increased and the weight of the person, especially the seat, can be increased. It becomes the structure which can provide the amount of elastic deformation proportional to the downward load to the rear part side of a body. Further, by fixing the upper side of the pair of left and right pipes with a sliding support plate, there is an effect that the left and right pipes can be elastically deformed integrally.
[0012]
Furthermore, the invention according to claim 3 is the chair according to claim 1 or 2, wherein the sliding support plate is formed with a vertically long guide groove hole and inserted into the guide groove hole. The lower end plate part of the support bracket is slidably connected via a bracket. Accordingly, the lower end of the support bracket of the seat body can be slidably supported along the inclined slide support plate, and the support bracket and the elastic support body cannot be separated via the guide pin. In addition, there is an effect that it is possible to change and adjust the front and rear positions very easily.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway side view of a chair, FIG. 2 is a partially cutaway rear view, and FIG. 3 is a perspective view of an essential part of an elastic support. The chair includes a pair of left and right legs 1, 1 parallel to each other in a front view, a seat 3 disposed between the left and right legs, a lower body 1, and a left and right legs 1, 1. An elastic support body 5 having a generally U-shape in a side view and a support bracket 6 projecting downward from the seat body 3 with respect to the elastic support body 5 are disposed at the front of the elastic support body. It comprises mounting means 4 that can be slidable and position-changeable along a downwardly inclined surface.
[0014]
The left and right legs 1 are constituted by a horizontal first frame 10 provided with casters 9 and a second frame 11 extending rearwardly from the front end of the first frame 10 in a side view. A backrest 7 is fixed between the upper ends of the body 11 with screws 12. Further, mounting holes 13 for the seat body 3 are formed at appropriate intervals along the oblique axis at the midway height position of the side surfaces of the left and right second frame bodies 11, and the inner surface at a position below the mounting holes 13. In this configuration, a plurality of engagement grooves 15 that support the left and right side ends of the tread plate 14 so as to be adjustable in a plurality of height positions are formed, and can be attached and fixed by bolts 16.
[0015]
As shown in FIGS. 1 to 3, the embodiment of the elastic support 5 formed in a substantially U shape in a side view bends a metal pipe 5 a in a substantially U shape in a side view, and The upper ends of both pipes 5a are integrally connected by a connecting pipe portion 5b. The lower ends of both pipes 5a, 5a are fixed to the horizontal pipe 17 by welding, and the left and right ends of the horizontal pipe 17 are connected to the inner surface of the first frame 10 via pins 18 and 18 so as to be rotatable. .
[0016]
Of the left and right pipes 5a, the left and right sides of the sliding support plate 19 for slidably supporting the lower end connecting plate 6a of the support bracket 6 along the inclined surface of the front lowering direction on the upper side. Fix both side edges by welding. The embodiment as the mounting means 4 for connecting the lower end connecting plate 6a of the support bracket 6 along the sliding support plate 19 so that the height position thereof can be adjusted is vertically long. Two rows of guide groove holes 20, 20, back plates 21, 21 slidable along the back surface of the sliding support plate 19, and headed guide pins 22 inserted through the guide groove holes 20, The sliding support plate 19 is sandwiched between the lower end connecting plate 6a and the back plate 21 and is slidable by the guide pin 22, and is slid with the support bracket 6 by a nut screwed into the tip screw portion of the guide pin 22. The movable support plate 19 is connected so as not to be separated.
[0017]
The sliding support plate 19 is attached to the sliding support plate 19 by a large-diameter handle portion 25 at the lower end of a mounting bolt 24 (with a nut) inserted through a fixing hole 23 drilled at an appropriate interval in the vertical direction of the sliding support plate 19. The lower end connecting plate 6a is fastened and fixed.
In addition, an adjustment hole 31 is formed in the longitudinal direction of the reinforcing plate 30 that is fixed downward on both left and right ends of the seat body 3 at an appropriate interval in the longitudinal direction, and the attachment hole 13 in the second frame 11 is formed. And the adjustment hole 31 are connected via a pivot pin 32 so that the rear end of the seat body 3 can be rotated downward. The base portion of the pivot pin 32 and the mounting hole 13 of the second frame body 11 are screwed together.
[0018]
In this configuration, in order to change the mounting height position of the seat body 3, the mounting bolt 24 is removed by rotating the large-diameter handle portion 25, and the sliding support plate 19 and the lower end connecting plate 6a are once fastened. Then, after removing the left and right pivot pins 32, the support bracket 6 is shifted upward or downward along the inclined sliding support plate 19. And the attachment hole 13 of both the left and right 2nd frame 11 and the adjustment hole 31 in the reinforcement board 30 of the right and left both sides of the seat body 3 match, Comprising: The height position of the seat body 3 is desired value. Then, the pivot pin 32 is inserted into the mounting hole 13 and screwed, and the mounting bolt 24 is inserted into a predetermined fixing hole 23 and screwed into the nut. The connecting plate 6a may be fastened and fixed.
[0019]
When a person sits on this sitting body 3 and takes a backward tilting posture, a downward load acts on the rear part of the sitting body 3 greatly. Most of the downward load is applied to the upper side of the elastic support 5 via the support bracket 6. At this time, the substantially pipe-shaped pipe 5a in a side view can be turned up and down around the lower end (the location of the pin 18), and the pipe 5a itself is substantially proportional to the magnitude of the load. Elastically deforms so that the dogleg-shaped bending angle deviates in the acute direction. Therefore, the seat body 3 can be rotated backward and tilted around the location of the mounting hole 13, and the rear side of the seat body 3 can be elastically supported by the elastic support body 5.
[0020]
Note that the configuration of the mounting means 4 is not limited to the above-described one, and the elastic support body has a function that can be slid along the inclined surface of the front downward shape and can be changed in fixed position. An equivalent configuration can be employed. Of course, the elastic support 5 is not limited to a pipe, and may be a plate.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view of a chair.
FIG. 2 is a partially cutaway rear view of the chair.
FIG. 3 is a perspective view of essential parts of an elastic support and mounting means.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Leg 3 Seat 4 Mounting means 5 Elastic support 5a Pipe 10 1st frame 11 2nd frame 13 Mounting hole 17 Horizontal pipe 18 Pin 19 Sliding support plate 20 Guide groove hole 21 Back plate 22 Guide pin 23 Fixing Hole 24 Mounting bolt 30 Reinforcement plate 31 Adjustment hole 32 Pivot pin

Claims (3)

A pair of left and right legs that are parallel to each other, and a seat that is disposed between the left and right legs, and between the left and right legs, an elastic support formed in a substantially U shape in a side view is provided. The support bracket, which is pivotally supported around the lower end thereof and protrudes downward from the seat body, is slid along the inclined surface of the front downward direction to the elastic support body. It is fixed via mounting means that can be moved and fixed, and the right and left sides of the seat body can be adjusted in height position through mounting holes that are drilled at appropriate intervals in the left and right legs. A chair characterized by being pivotably supported. The elastic support is composed of a pair of left and right pipes made of metal, etc., both pipes are formed in a substantially square shape in side view, and the upper ends of both pipes are integrally connected by a connecting portion. The sliding support plate for supporting the lower end of the support bracket so as to be slidable is fixed to the upper side of the pair of left and right pipes along the inclined surface of the front lowering shape. Item 1. The chair according to Item 1. The slide support plate is formed with a vertically long guide groove hole, and a lower end plate portion of the support bracket is slidably and non-detachably connected via a guide pin inserted through the guide groove hole. The chair according to claim 1 or 2.

Images