JP2007075533A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable adjustment of the height and the depth of a backrest by displacing the backrest in vertical direction and adjustment to make a chair tailored to the body of a user in a wider scope by decentering the installing means of such backrest. <P>SOLUTION: A backrest 11 is installed on a backrest supporting section 2c provided on both sides of a chair in a displaceable manner in vertical direction. Also the backrest 11 is provided with installing sections 13a, 13b which are installed in an attachable/detachable manner to/from the backrest supporting section 2c and the center of the installing sections are decentered in one side of the vertical direction from the center of the backrest in the vertical direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a chair.

Conventionally, in a backrest in a chair, a plurality of mounting holes are provided in the backrest support portion in the vertical direction, and the height of the backrest is changed by selecting the mounting holes and attaching the backrest. (See Patent Document 1).
JP 2002-65413 A

  As in the prior art, in the case where a plurality of mounting holes are provided in the back support portion and the backrest is displaced in the vertical direction, if the vertical adjustment range of the backrest is to be expanded, the backrest itself is lengthened (larger). It is necessary to make the back support part long (high). For this reason, the parts become large, and the chair itself becomes large or heavy, making it difficult for the child to handle the chair.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a chair that solves the above-mentioned problems by increasing the range of adjustment of the backrest without increasing the backrest or the backrest support portion.

  In order to solve the above-mentioned problem, the invention according to claim 1 is such that when the backrest of the chair is attached to the backrest support portion and the backrest is attached upside down, the height of the backrest is increased. It was formed to change.

  According to the second aspect of the present invention, the chair back is provided with an attachment portion that is detachably attached to the back support portions provided on both sides of the chair, and the center of the attachment portion is moved up and down from the center in the vertical direction of the backrest. It is provided eccentric to one of the directions.

  According to a third aspect of the present invention, in the second aspect of the present invention, of the upper and lower end surfaces of the backrest, the end surface on the side opposite to the side where the center of the mounting portion is decentered, the central portion in the left-right direction outward It is formed on the protruding surface.

  The invention according to claim 4 is provided with attachment means for detachably attaching to the backrest support portions provided on both sides of the chair on the backrest of the chair, and a plurality of the attachment means are arranged in the vertical direction of the backrest, The distance between one end face and the mounting means arranged on the one end face side is set longer than the distance between the other upper and lower end faces of the backrest and the mounting means arranged on the other end face side. .

  The invention according to claim 5 is the invention according to claim 4, wherein one end surface of the backrest is formed as a surface in which a central portion in the left-right direction of the backrest protrudes outward.

  A sixth aspect of the invention is the invention according to any one of the first to fifth aspects, wherein the backrest supporting portion is provided with attachment means capable of displacing the backrest in a plurality of stages in the vertical direction.

  The invention according to claim 7 is the invention according to any one of claims 1 to 6, wherein the backrest support portion is formed so that an upper portion thereof is inclined rearward of the chair.

  According to the present invention, the receiving surface of the backrest can be displaced in the up-down direction by replacing the backrest with the up-and-down direction reversed even if the mounting position is the same height. Therefore, the adjustment range of the backrest can be widened without lengthening (increasing) the backrest and the backrest support portion, and the conventional problems can be solved.

  According to invention of Claim 3 and 5, the support effect of a body can be made more effective.

  According to the invention described in claim 6, the height of the backrest can be adjusted more finely by the stepwise displacement of the backrest relative to the backrest support portion and the change in the vertical direction of the backrest.

  According to the seventh aspect of the present invention, the depth of the seating surface can be changed by adjusting the backrest in the vertical direction.

The best mode for carrying out the present invention will be described with reference to the drawings.
As shown in FIGS. 1 to 4, the support frames 2 and 2 constituting the chair 1 are formed of wooden planks, and a pair is provided on both sides of the chair 1. The support frames 2 and 2 are integrally configured such that the horizontal leg 2a is positioned horizontally in the front-rear direction with respect to the floor surface, and the leg 2b is bent upward from the rear of the horizontal leg 2a. Has been. The leg 2b is inclined forward in the chair 1 as it goes upward, and a backrest support 2c is integrally formed above the leg 2b (the A side is the front side and the B side is the rear side in FIG. 1). Has been. Further, the backrest support portion 2c is inclined rearward of the chair 1 as it goes upward. That is, the leg portion 2b and the backrest support portion 2c are formed in a dogleg shape that is bent forward as viewed from the side, and are configured at the rear of the chair 1. The leg 2b is provided with a seat support 2d.

  In addition, since both the support frames 2 and 2 are formed in the same structure, the same code | symbol is attached | subjected and demonstrated to the same structure part of both the support frames 2 and 2. FIG.

  A support rod mounting hole is formed in the lateral leg portion 2a and the leg portion 2b of both the support frames 2 and 2 so as to penetrate inside and outside, and the support rods 3 and 4 are interposed between the support frames 2 and 2, respectively. It is fixed by bolts 5 through the support rod mounting holes. Thereby, both the support frames 2 and 2 are hold | maintained in parallel at predetermined intervals.

  The seat support portions 2d and 2d of the support frames 2 and 2 have a plurality of seat mounting holes 6 and 6 penetrating in the front-rear direction, seven in the illustrated embodiment, and have a predetermined equal interval. Are formed vertically.

  A seat portion 7 is disposed between the support frames 2 and 2 and positioned in front of the support frame 2, and wooden seat support frames 8 are fixed to both side surfaces of the seat portion 7. A fixed portion 8a that is bent along the front surface of the leg portion 2b is formed at the rear portion of the seat support frame 8. The fixing portion 8a has a plurality of seat-side mounting holes 9 penetrating in the front-rear direction, two in the illustrated embodiment, and a predetermined interval in the vertical direction (interval twice the hole interval of the seat-mounting holes 6). It is formed.

  Then, the bolts 10 as mounting means are inserted into the seat mounting holes 6 and 6 formed in the both support frames 2 and 2 and the seat mounting holes 9 and screwed into the nuts 10a. The support frames 2 and 2 are detachably attached.

  As described above, since the plurality of seat mounting holes 6 and 6 of the support frames 2 and 2 are formed in the vertical direction, the desired seat mounting holes 6 and 6 are selected and the height of the seat 7 is selected. Can be adjusted. Furthermore, as the leg portion 2b of the support frames 2 and 2 is inclined in the forward tilted posture as described above, the seat portion 7 is positioned to the front side of the chair 1 as the mounting position of the seat portion 7 is increased. Can be made.

  A plate-like backrest 11 is disposed between the backrest support portions 2c and 2c. Adjustment holes (attachment holes) 12 and 12 as attachment means are formed in the back support 2c. The adjustment holes 12, 12 are holes that penetrate through the inner and outer surfaces of the back support 2c (the left and right direction of the chair), and in the illustrated embodiment, five holes are formed at predetermined equal intervals in the vertical direction. .

  As shown in FIG. 5, the backrest 11 is formed by a protruding portion 11a having one end surface in the upper and lower directions protruding outward in the vertical direction, and the other end surface is formed by a straight portion 11b made of a straight horizontal plane. Yes. The protruding portion 11a is formed in an arcuate surface in which the center portion X1 of the backrest 11 in the left-right direction protrudes outward.

  The left and right end faces 11c and 11d of the backrest 11 are formed as parallel faces. A plurality of nuts (attachment means) 13a and 13b constituting the attachment portion of the backrest 11 are provided on the both end surfaces 11c and 11d in the vertical direction, two in the illustrated embodiment. Further, the nuts 13a and 13b are arranged at an interval twice the vertical interval between the adjustment holes (attachment means) 12 and 12. Further, the two nuts 13a and 13b at the upper and lower portions are embedded in a position where the center X3 between the two nuts 13a and 13b is eccentric to one side with respect to the center X2 in the vertical direction of the backrest 11. In other words, the center X3 of the mounting portion including the nuts 13a and 13b on the backrest 11 side is provided eccentrically (offset) from the vertical center X2 of the backrest 11. In the embodiment, the distance H1 between one nut 13a on the protruding portion 11a side and the end surface (one end surface) of the protruding portion 11a is the distance between the other nut 13b and the end surface (the other end surface) of the straight portion 11b. It is longer than H2.

  Therefore, when the backrest 11 is mounted upside down without changing the height of the mounting portion (mounting position) between the backrest 11 and the backrest support portions 2c, 2c, the height of the backrest 11 changes.

  As shown in FIG. 2, the backrest 11 is screwed into the corresponding nuts 13a and 13b through the two upper and lower adjustment holes 12 and 12 formed in the backrest support portions 2c and 2c. By being tightened, the support frames 2 and 2 are detachably attached.

  As described above, since the plurality of adjustment holes (attachment means) 12 of the back support portions 2c and 2c are formed in the vertical direction, a desired adjustment hole is selected and the height of the backrest 11 is adjusted in a plurality of stages. can do. Further, as described above, since the back support portions 2c and 2c are inclined in the rearward tilting posture, the backrest 11 is moved to the rear of the chair 1 while maintaining the rearward tilting posture as the mounting position of the backrest 11 is increased. Can be located to the side.

  Further, since the backrest 11 has both end faces 11c and 11d parallel to each other and parallel to the support frames 2 and 2, as described above, the front and back faces of the backrest 11 are reversed. It can be installed in the opposite direction. Accordingly, in the backrest 11, as described above, the center X3 between the nuts 13a and 13b of the both end faces 11c and 11d is decentered from the vertical center X2 of the backrest 11, and the distance H1 between the nut 13a and the end face of the protruding portion 11a. 2 is longer than H2. Therefore, as shown in FIG. 2, when the projecting portion 11a is arranged to face downward, the receiving surface of the backrest 11 is made more than when the straight portion 11b is positioned at the lowest position. On the contrary, as shown in FIG. 6, when the protruding portion 11a is positioned upward, the receiving surface of the backrest 11 is more upward than when the straight portion 11b is positioned at the uppermost position. Can be arranged.

Next, the use state of the chair 1 will be described.
For example, when the user is a child and the height is small, as shown in FIGS. 1 to 4, the seat 7 is mounted at a low position using the lower mounting holes in the seat mounting holes 6 and 6. The backrest 11 is attached at a position below the adjustment holes 12 and 12.

  At this time, the lower the seat portion 7 is, the more the seat portion 7 is located rearward and the depth of the seat surface becomes shallower. Further, as the backrest 11 is moved downward, the backrest 11 is positioned forward and the depth of the seat surface becomes shallower.

  6 and 7, as the height increases, the seat portion 7 is attached to the upper position using the upper seat attachment holes 6 and 6, and the backrest 11 is located above the adjustment holes 12 and 12, as shown in FIGS. Install at.

  At this time, as the seat 7 is raised upward, the seat 7 is positioned forward and the depth of the seat becomes deeper. Further, as the backrest 11 is moved upward, the backrest 11 is located rearward and the depth of the seat surface is increased.

  Therefore, by appropriately selecting and combining the mounting position of the seat portion 7 and the mounting position of the backrest 11, it is possible to change the chair to a form that matches the change in height.

  Further, in the present invention, the attachment portion of the backrest 11 is eccentric as described above, and the following effects are obtained.

  In the use of a child with a small height as described above, when the projection 11a is mounted on the lower side, the projection 11a extends downward and forward, so that the interval between the seating surface and the backrest is reduced. The depth of the surface can be reduced, and even a small child can support it comfortably from the back to the waist. In addition, when using the projector when the height is large, if the projection 11a is mounted on the upper side, the projection 11a extends upward and rearward, so that the backrest has a sufficient height and the depth of the seat surface is increased. It can be secured deeper. Furthermore, since the linear part 11b is located below and the space | interval of a seat surface and the linear part 11b becomes wide upwards and back, a waist can be located deeply. Therefore, even a tall person can lean enough.

  Therefore, the adjustment range of the backrest 11 can be expanded without making the backrest support 2c and the backrest 11 longer (larger). Thereby, it can suppress that a chair itself becomes large, becomes heavy, and a balance becomes bad, and it becomes easy to handle a child.

  In addition, the position of the seat 7 and the backrest 11 and the direction of the protruding portion 11a may be used in combination so as to take an appropriate sitting posture and sitting position with respect to the desk in the growth process of the user. That is, not limited to the above combination, the backrest 11 is high and the seat portion 7 is low, the backrest 11 is low and the seat portion 7 is high, or the seat portion 7 and the backrest 11 are intermediate For example, the height may be adjusted according to the height of the user, and the direction of the protruding portion 11a may be determined and used.

  From the above, the backrest 11 can widen the support range, and can be finely adjusted by using it upside down. In addition, the support is effective because the tip swells in an arc shape.

  In addition, the protrusion part 11a is not restricted to the shape swelled in circular arc shape as mentioned above, You may form in a horizontal linear surface and other shapes.

  In the above embodiment, one support frame 2 is bent and the backrest support portion 2c is formed integrally with the leg portion 2b. However, the backrest support portion 2c may be provided independently of the leg portion 2b. Alternatively, the backrest support portion 2c may have a shape that does not tilt backward.

  Although the present invention can be applied to a normal chair, it is particularly preferable to apply it to a wooden chair for a learning desk.

The perspective view of the chair which shows the Example of this invention. The front view which located the backrest and the seat part in the Example of this invention below. The rear view of FIG. The side view of FIG. The perspective view of the backrest in the Example of this invention. The front view which located the backrest and the seat part in the Example of this invention upward. The side view of FIG. FIG. 7 is a front view in which a backrest and a seat portion are positioned in the middle between FIG. 2 and FIG. 6. The side view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2c Backrest support part 11 Backrest 11a Projection part 13a, 13b which is the protruded end surface X1 Nut which comprises attachment part X1 Center part of the backrest in the left-right direction X2 Center of backrest in the vertical direction X3 Center of attachment part

Claims (7)

  A chair characterized in that the height of the backrest is changed when the backrest of the chair is attached to the backrest support portion and the backrest is attached upside down.   The chair back is provided with a mounting part that is detachably attached to the back support part provided on both sides of the chair, and the center of the mounting part is decentered from the center in the vertical direction of the backrest to one side in the vertical direction. A chair characterized by that.   The upper and lower end surfaces of the backrest are formed such that an end surface opposite to a side where the center of the mounting portion is eccentric is formed on a surface whose central portion in the left-right direction protrudes outward. Chair.   The chair back is provided with attachment means that is detachably attached to the back support portions provided on both sides of the chair, and a plurality of the attachment means are arranged in the vertical direction of the backrest, and one end face and one end face of the backrest above and below A chair characterized in that the distance between the mounting means arranged on the side is set longer than the distance between the other upper and lower end surfaces of the backrest and the mounting means arranged on the other end face side.   5. The chair according to claim 4, wherein one end face of the backrest is formed on a face from which a central portion in the left-right direction of the backrest protrudes outward.   The chair according to any one of claims 1 to 5, wherein mounting means capable of displacing the backrest in a plurality of stages in the vertical direction is provided on the backrest support portion.   The chair according to any one of claims 1 to 6, wherein the backrest support portion is formed so that an upper portion thereof is inclined rearward of the chair.

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