JP2007014372A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a depth of a seat part of a chair adjustable through a longitudinal shift of the back and an adjustment operation of shifting the back easily adjustable seeing the body of an occupier as the occupier such as a schoolchild sits on. <P>SOLUTION: The back 14 is shiftably provided on a space between the back support parts 2b and 2b provided on both sides of the chair in a longitudinal direction of the chair. Guide grooves 16 and 17 having long groove shapes and keeping the rear parts upward incline provided on the back support parts 2b and 2b. The back 14 is longitudinally shiftably provided along and on the guide grooves 16 and 17. A fixing means 21 is provided on the back support parts 2b and 2b and the back 14 for fixing a shift position of the back 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a chair.

  Conventionally, in a wooden schoolchild chair, as a method of adjusting the seating position of the schoolchild in the front-rear direction with respect to the chair, one that moves only the seat (seat) in the front-rear direction is known.

  In the case of adjusting the seating position by moving only the seat part (seat) in the front-rear direction as in the prior art, when adjusting the front-rear position of the seat part, the schoolchild is still seated in the seat part. To adjust, the load of schoolchildren is applied to the seat, it is difficult for the operator to move the seat, and the bolts that fix the seat are on the lower surface of the seat that is difficult to operate, etc. It was necessary to drop the schoolchild from the chair or to lift the waist, and the adjustment operation was inconvenient.

  Therefore, the present invention allows the optimal seating position to be set by adjusting the position of the backrest in the front-rear direction while the schoolchild is seated on the seat if the position of the seat can be roughly set, and An object of the present invention is to provide a chair that can be easily adjusted.

  In order to solve the above-mentioned problem, the invention according to claim 1 is provided with a backrest that is displaceable in the front-rear direction of the chair between the backrest support portions provided on both sides.

  The invention according to claim 2 is characterized in that a backrest is provided between the backrest support portions provided on both sides so that the backrest can be moved in the front-rear direction of the chair and the moving position can be fixed. .

  In the said invention, the depth of a seat surface can be adjusted by moving a backrest to the front-back direction, and changing a position, and it can adjust to the chair suitable for the user of the chair (seating person).

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the backrest is moved to a higher position as the backrest moves rearward.

  In the present invention, when the height of the user of the chair increases, if the backrest is moved backward to change the position and the depth of the seat surface is deepened, the position of the backrest is also increased, and the position of the backrest is Can be adjusted to the sitting height of the user.

  According to a fourth aspect of the present invention, in the first, second, or third aspect of the invention, the both backrest support portions are provided with long groove-shaped guide grooves whose rear portions are inclined upward, and the backrest is moved back and forth along the guide grooves. It is characterized in that it is provided so as to be movable in the direction, and a fixing means for fixing the movement position of the backrest is provided on the backrest support portion and the backrest.

  In the present invention, since the guide groove is formed in a long groove shape whose rear portion is inclined upward, the position of the backrest can be adjusted steplessly in the front-rear direction.

  According to a fifth aspect of the present invention, an adjustment hole penetrating the backrest support portion inward and outward is formed in the backrest support portion provided on both sides so that the rear portion is inclined upward in the longitudinal direction of the chair and the rear portion is inclined upward. In addition, on the inner surface of the both back support portions, a long groove-shaped guide groove is formed parallel to the adjustment hole and at the upper and lower portions of the adjustment hole, and the backrest is disposed between the two back support portions. In addition, a pin projecting on both side end surfaces of the backrest is slidably fitted into the guide groove so that the backrest can be moved in the front-rear direction, and further, the moving position of the backrest is fixed through the adjustment hole. Means are provided.

  According to a sixth aspect of the present invention, in the fifth aspect of the present invention, the fixing means is configured such that nuts are fixed to both end surfaces of the backrest, and bolts are screwed onto the nut from the outside of the backrest support portion through the adjustment holes. It is configured to fix the backrest.

  In the inventions according to claims 5 and 6, as described above, the backrest can be moved and adjusted steplessly in the front-rear direction.

  According to the first and second aspects of the present invention, for example, the position of the seat (seat) with respect to a user of a chair such as a schoolchild is roughly set, and the backrest is moved back and forth while the user is seated on the seat. By moving in the direction and adjusting the position of the backrest, it is possible to adjust the depth of the seating surface suitable for the user.

  Since the position for performing the operation of changing the position of the backrest is the position of the backrest that can be operated while the operator is standing, it is extremely easy to adjust the movement of the backrest compared to the conventional operation on the lower surface of the seat. Can do.

  Furthermore, since the position adjustment operation of the backrest can be performed at the backrest, the position of the backrest can be adjusted while observing the state of the user's body, i.e., the position of the back and the correct sitting posture, while the user is seated. Can be easily set to an optimal position.

  According to the third aspect of the present invention, since the backrest can be moved (displaced) to a higher position by moving (displacement) the backrest to the rear portion, the height of the seat surface increases as the user's height increases. The depth can be deepened, and the backrest can be raised according to the increased seat height, making it an optimal chair for the user.

  According to the fourth to sixth aspects of the present invention, the movement of the backrest in the front-rear direction can be adjusted steplessly, and the position of the backrest can be finely adjusted.

The best mode for carrying out the present invention will be described with reference to the drawings.
The support frames 2 and 2 constituting the chair 1 are formed of a thick wooden plate material, and a pair is provided on both sides of the chair 1. The support frames 2 and 2 are inclined so that the lower part is located forward (the A side is the front side and the B side is the rear side in FIG. 1) and the upper part is located rearward, that is, in a backward tilted posture. Is provided. Further, the lower portions of the support frames 2 and 2 constitute a front leg portion 2a, the upper portion constitutes a back support portion 2b, and the middle portion constitutes a seat portion support portion 2c.

  A pair of wooden rear legs 3, 3 are provided on both sides of the chair 1 on the rear side of the support frames 2, 2. It is fixed near the upper part, and the lower part is connected to the lower ends of the support frames 2 and 2 via connecting members 4 and 4.

  Since both the support frames 2 and 2 are formed in the same structure, and the rear legs 3 and 3 are also formed in the same structure, the same reference numerals are used for the same structure parts of the support frames 2 and 2. The same structural parts of both rear legs 3 and 3 will be described with the same reference numerals.

  A plurality of fitting grooves 5 and 5 are formed in the upper and lower sides in parallel on the inner side surfaces of the lower portions of the support portions 2 and 2 in the front-rear direction. Then, both ends of one wooden step 6 can be detachably fitted from the front into the fitting grooves 5 and 5 at a desired height among the plurality of fitting grooves 5 and 5. . Further, step mounting holes 7 and 7 are formed in the lower portions of the support frames 2 and 2 so as to be located in the respective fitting grooves 5 and 5, and the fitting grooves 5 and 5 at desired positions as described above are formed. The step 6 fitted into the step can be fixed with bolts through the step mounting holes 7 and 7.

  Therefore, the step 6 can be changed and fixed to a height position suitable for the user of the chair 1.

  Further, as described above, the support frames 2 and 2 are inclined in the backward inclined posture, so that each fitting groove 5 has the upper fitting groove 5 behind the lower fitting groove 5. Therefore, as step 6 is sequentially replaced with the upper fitting groove 5 with respect to the lowermost fitting groove 5, that is, as the position of step 6 is increased, step 6 is moved to the rear side of chair 1. It can be made to.

  A plurality of front seat mounting holes 8 and 8 are formed in the seat support portions 2c and 2c of the support frames 2 and 2 with a predetermined interval in the vertical direction. Further, a plurality of rear seat mounting holes 9, 9 are formed in the rear legs 3, 3 with a predetermined interval in the vertical direction. The vertical interval between the rear seat mounting holes 9, 9 is set to be equal to the vertical interval between the front seat mounting holes 8, 8 on the support frame 2 side. The rear seat mounting holes 9, 9 are formed in the same number as the front seat mounting holes 8, 8 corresponding to the front seat mounting holes 8, 8, and are attached to both the mounting holes 8, 9. The rear seat mounting hole 9 is formed slightly below the front seat mounting hole 8 so that the rear of the later-described seat 10 is slightly lowered.

  A seat 10 is disposed between the support frames 2 and 2, and seat-side mounting holes 12 are formed in front of both side surfaces of the wooden base frame 11 in the seat 10. A plurality of seat side mounting holes 13 are formed on the rear side of both side surfaces of the base frame part 11 with a predetermined interval in the front-rear direction.

  Then, the bolt is screwed into the seat-side mounting hole 12 through the front-side seat mounting holes 8, 8 formed in the both support frames 2, 2, and the rear seat-mounting hole 9 is further formed in the rear leg 3. , 9 is screwed into the seat-side mounting hole 13 so that the seat 10 is detachably mounted between the support frames 2 and 2.

  As described above, since the front seat mounting holes 8 of the support frames 2 and 2 and the rear seat mounting holes 9 of the rear legs 3 are both formed in the vertical direction, these mounting holes are selected. The height of the seat 10 can be adjusted. Further, as described above, since the support frames 2 and 2 are inclined in the rearwardly inclined posture, the front seat mounting holes 8 of the support frames 2 and 2 are arranged in an upper stage with respect to the lower front seat mounting holes 8. Since the front seat portion mounting hole 8 is located rearward, the seat portion 10 is sequentially attached to the upper front seat portion mounting hole 8 with respect to the lowermost front seat portion mounting hole 8, that is, the seat portion 10 is attached. The higher the position, the more the seat 10 can be positioned on the rear side of the chair 1. Note that a plurality of seat-side mounting holes 13 are formed in the front-rear direction, and the seat-side mounting holes 13 are rear leg seats on the rear leg 3 side by changing the height of the seat 10 and the position in the front-rear direction. The rear part of the seat part 10 can be attached to the rear leg 3 corresponding to the attachment hole 9.

Next, the backrest 14 will be described with reference to FIGS.
Adjustment holes 15 and 15 are formed in the back support portions 2b and 2b which are upper portions of the support frames 2 and 2, respectively. The adjustment holes 15, 15 are holes that penetrate the inner and outer surfaces of the back support portions 2 b, 2 b and are long holes that are long in the front-rear direction of the chair 1. Further, as shown in FIG. 8, the adjustment hole 15 is inclined at a predetermined angle θ1 with respect to the horizontal plane so that the front side thereof is lowered and the rear side thereof is raised.

  Further, on the outer surface of the back support portions 2b, 2b, a long groove 15c is formed on the outer periphery of the adjustment holes 15, 15 in which a head 21a of a bolt 21 described later is fitted.

  Further, the adjustment hole 15 is formed at the same height and at the same inclination, one on each of the back support portions 2b, 2b.

  Further, on the inner surface side of the back support portions 2b, 2b, an upper guide groove 16 and a lower guide groove 17 are located in the upper and lower portions of the adjustment holes 15, 15 in parallel with the adjustment holes 15, 15, That is, it is formed to be inclined at the same angle θ1 as the adjustment hole 15. Further, the guide grooves 16 and 17 are formed in a long groove shape having the same length as that of the adjustment hole 15 in the front-rear direction. Further, as shown in FIG. 6, the guide grooves 16 and 17 are formed as grooves opened only on the inner surface side without penetrating the outer surfaces of the backrest support portions 2b and 2b.

  Further, the length of the one adjusting hole 15 and the lengths of both guide grooves 16, 17 are formed to be the same length, and the front end portions 15a, 16a, 17a have a predetermined angle with respect to the horizontal. Each rear end portion 15b, 16b, 17b is formed on one line Y having the angle θ2, and is positioned on one line X having θ2.

In the example, the angle θ1 was set to about 25 degrees, and the angle θ2 was set to about 75 degrees.
Between the backrest support portions 2b and 2b of the support frames 2 and 2 disposed on both sides of the chair 1, a wooden plate-like backrest 14 is disposed.

  As shown in FIGS. 4 and 7, nuts 18 serving as fixing means are embedded in both the left and right end surfaces of the backrest 14 at a substantially central portion in the vertical direction, and the female screw 18 a is attached to the backrest 14. Open to the end face. Further, an upper guide pin 19 and a lower guide pin 20 are fixedly provided on both end faces of the backrest 14 so as to be positioned at the upper part and the lower part of the nut 18. The upper guide pin 19, the lower guide pin 20, and the guide grooves 16 and 17 constitute guide means for guiding the movement of the backrest 14.

  As shown by the chain line in FIG. 8, the setting positions of the nut 18 and the guide pins 19 and 20 are such that the nut 18 is positioned in the adjustment hole 15 in a state where the backrest 14 is inclined at the angle θ2. The upper guide pin 19 is set in the upper guide groove 16 and the lower guide pin 20 is set in the lower guide groove 17. Further, as shown in FIG. 7, the diameter of the upper guide pin 19 is set to a diameter that is substantially the same as the width of the upper guide groove 16 and can slide in the upper guide groove 16 in the longitudinal direction. The diameter of the pin 20 is set to a diameter that is approximately the same as the groove width of the lower guide groove 17 and can slide in the lower guide groove 17 in the longitudinal direction, and both guide pins 19 and 20 are fitted in both guide grooves 16 and 17. In the combined state, when the backrest 14 is moved in the front-rear direction, the backrest 14 moves back and forth while substantially maintaining the inclination angle θ2.

  When the chair 1 is assembled, the backrest 14 is assembled between the support frames 2 and 2 with the upper guide pin 19 fitted into the upper guide groove 16 and the lower guide pin 20 fitted into the lower guide groove 17. Has been placed. Then, the backrest 14 is disposed at a desired position in the front-rear direction, and as shown in FIG. 7, a bolt 21 as a fixing means, for example, a large head bolt, is passed through the adjustment holes 15 and 15 formed in the backrest support portions 2b and 2b. The backrest 14 is fixedly disposed between the support frames 2 and 2 by screwing onto the nut 18 and tightening.

  Further, when the fixed backrest 14 is displaced (moved) in the front-rear direction, the bolt 21 is loosened, the backrest 14 is moved to a desired position along the guide grooves 19 and 20, and the bolt 21 is tightened at the position. Thus, the position can be fixed.

  Since the mounting structure of the backrest 14 is configured as described above, when the backrest 14 is moved rearward from the foremost portion, the backrest 14 moves rearward while maintaining a predetermined inclination θ2, and also moves rearward. The position moves to a higher position along the angle θ1.

  Further, since the adjustment hole 15 is formed as a long hole and the both guide grooves 16 and 17 are formed in a long groove shape, the backrest 14 can be displaced steplessly and fine fine adjustment is possible.

Next, the use state of the chair 1 will be described.
For example, when the user is a child and the body is small, the seat 10 is mounted at a high position using the upper mounting holes in the mounting holes 8 and 9, and step 6 is fitted into the upper fitting groove 5. Attach to a higher position. Further, the backrest 14 is attached at a position in front of the adjustment hole 15.

  As the body becomes larger, the seat portion 10 is attached to the lower position using the lower attachment holes 8 and 9, and the step 6 is attached to the lower position using the lower fitting groove 5. Further, the backrest 14 is attached at a position behind the adjustment hole 15.

  At this time, the lower the seat portion 10 is, the more the seat portion 10 is positioned forward and the deeper the seat surface.

Further, step 6 is positioned forward as step 6 is lowered downward.
Furthermore, as the backrest 14 is moved rearward, the depth of the seat surface becomes deeper and the position of the backrest becomes higher.

Therefore, it is possible to change the chair to a form that matches the change in height.
Furthermore, in the present invention, since the positioning (displacement adjustment) of the backrest 14 can be performed by moving only the backrest 14, the following effects are obtained.

  The position of the backrest 14 is adjusted by placing the backrest 14 behind the adjustment hole 15 with the bolt 21 loosened, and sitting the child on the seat portion 10, and then the operator takes the posture of the child's body. While seeing, that is, while correcting the posture, the backrest 14 is moved forward and applied to the back of the child, and the bolt 21 is tightened at that position.

  At this time, since only the backrest 14 is moved, the moving parts can be adjusted easily and lightly. Furthermore, since the person who performs the adjustment operation can perform while looking at the back of the child while standing in the rear part of the chair 1, the work is extremely easy as compared with the conventional case where the adjustment operation is performed on the lower surface of the seat part. It can be done easily and the backrest can be adjusted to the optimum position.

Furthermore, the displacement (movement) adjustment of the backrest 14 can be finely adjusted steplessly.
In addition, in the said Example, although the backrest support part 2b was formed with the one support frame 2 which has the front leg part 2a and the seat part support part 2c, it does not form in this way, but only the backrest support part 2b is a chair. The backrest 14 may be provided independently of the base frame member, and the backrest 14 may be provided on the backrest support portion by the above-described structure.

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

The perspective view of the chair which shows the Example of this invention. The perspective view of the backrest part in the Example of this invention. The perspective view of the backrest support part in FIG. The perspective view which shows the end surface part of the backrest in FIG. FIG. 4 is an inner view of the back support portion of FIG. 3. CC sectional view taken on the line in FIG. Sectional drawing which shows the connection part of the backrest support part and backrest in FIG. The figure which shows the displacement state of the backrest with respect to the backrest support part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chair 2b Backrest support part 14 Backrest 15 Adjustment hole 16, 17 Guide groove 18 Nut 19,20 pin which is fixing means 21 Bolt which is fixing means θ1, θ2 Inclination angle

Claims (6)

  A chair comprising a backrest that is displaceable in the front-rear direction of the chair between backrest support portions provided on both sides.   A chair provided with a backrest between backrest support portions provided on both sides so that the backrest can be moved in the front-rear direction of the chair and the moving position can be fixed.   The chair according to claim 1 or 2, wherein the backrest is moved to a higher position as the backrest moves rearward.   The both back support portions are provided with long groove-shaped guide grooves whose rear portions are inclined upward, the backrest is provided so as to be movable in the front-rear direction along the guide grooves, and the backrest is moved to the backrest support portion and the backrest. 4. A chair according to claim 1, further comprising a fixing means for fixing the chair.   In the back support part provided on both sides, an adjustment hole that penetrates the back support part inside and outside is formed so that it is a long hole long in the front and rear direction of the chair and the rear part tilts upward, and further supports both backs A long groove-like guide groove is formed on the inner surface of the adjustment hole at the upper and lower portions of the adjustment hole and parallel to the adjustment hole, and the backrest is disposed between the two backrest support portions, and both sides of the backrest A pin protruding from the end face is slidably fitted into the guide groove so that the backrest can be moved in the front-rear direction, and a fixing means for fixing the movement position of the backrest through the adjustment hole is provided. And a chair.   The fixing means comprises a nut fixed to both side end surfaces of a backrest, and a bolt is screwed onto the nut through the adjustment hole from the outside of the backrest support portion to fix the backrest. 5. The chair according to 5.

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