JP4045933B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair that can change the back-and-forth position of the backrest according to the physique such as the growth of a child.
[0002]
[Prior art]
Various chairs have been proposed as this type of chair that can adjust the back and forth position of the backrest by sliding a backrest support rod with a backrest plate attached to the upper end in the front-back direction. (For example, refer to Patent Documents 1 and 2.)
In addition to the one that slides the backrest support rod, a similar backrest support mechanism is configured by first to fourth links that form a parallelogram chain, and the upper end is centered on the lower end portion of the support mechanism. A chair has been proposed in which the depth position and height of the backrest can be adjusted according to the physique of the seated person by tilting the backrest plate back and forth (see, for example, Patent Document 3).
[0003]
However, these conventional backrest adjusting means have a complicated mechanism for sliding and rotating a support mechanism having a backrest plate, which increases the manufacturing cost and prevents backrest. While this causes stabilization and backlash, there is no need for such backrest adjustment on a daily basis, and a simpler means for backrest adjustment has been demanded.
[0004]
[Patent Document 1]
Japanese Utility Model Publication No. 55-28127 [Patent Document 2]
Japanese Utility Model Publication No. 6-987 [Patent Document 3]
Registered Utility Model No. 3067910 [0005]
[Problems to be solved by the invention]
Therefore, in view of the above-described situation, the present invention intends to provide a stable chair that can adjust the back-and-forth position of the backrest at low cost without using a complicated mechanism and is less likely to be loose. In the point.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a chair in which a first backrest plate is provided at the upper rear portion between left and right support frames extending in the height direction, and a seat is provided in the middle in the height direction. The support frame includes at least a rear support for supporting the rear end portion of the seat portion and a front support for supporting the seat portion in front of the rear support portion, and above the seat portion. The first backrest plate is provided between the extended upper end portions of the rear support rod, and the second backrest plate is disposed between the front support shaft that extends upward from the seat portion. Provided is a chair characterized in that it is detachably attached and extended through an attachment rod that extends downward at a side end portion and abuts against the inner surface of the front support rod .
[0007]
Here, the mounting position of the seat with respect to the rear support and the front support constituting the support frame can be changed along the height direction, the seat is attached to the lower position, and the seat It is preferable that the second backrest plate is passed through the attachment rod at a position at a predetermined height of the rear support rod extending further upward.
[0008]
In addition, it is preferable that the attachment rod of the second backrest plate is detachably attached using attachment means for attaching the seat portion to an upper position.
[0009]
It is preferable that the second backrest plate is attached to a predetermined position lower than the first backrest plate.
[0010]
What provided the surplus space between the 1st backrest board extended over the said seat part and the 2nd backrest board is preferable.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0012]
FIG. 1 is a perspective view showing an overall configuration of a chair according to the present invention, in which FIGS. 1 to 10 show typical embodiments, in which 1 is a chair, 2 is a support frame, and 3 is a first backrest. A plate, 4 is a seat portion, and 5 is a second backrest plate.
[0013]
As shown in FIGS. 1 and 2, the chair 1 of the present invention has a first backrest plate 3 laid across the rear upper part 10 between the left and right support frames 2 and 2 extending in the height direction. A seat portion 4 is provided in the middle portion 12, and a second backrest plate 5 is also provided at a predetermined position in front of the backrest plate 3 between the support frames 2 and 2 and above the seat portion 4. It is detachably mounted and extended, and the second backrest plate 5 adjusts the depth from the seat front end to the backrest according to the length of the thigh of a small seated person such as a child. When the child grows up, the second backrest plate 5 can be removed from the position and can be seated using the first backrest plate 3.
[0014]
The support frame 2 is located at a rear position by a distance substantially the same as the height of the seat portion 4 attached to the lower stage position 13 from the front end of the ground rod 20 arranged in the front-rear direction, in this example, near the center portion of the ground rod 20. A support 21 is erected, a rear support 22 is erected at the rear end of the ground support 20, and horizontal rails 23 and 23 are provided to connect the upper ends of the front support 21 and the rear support 22. The frame is configured.
These left and right support frames 2, 2 have a front horizontal support 24 laid between the middle portions of the two front supports 21, 21 near the lower part, and between the middle parts of the rear support parts 22, 22 near the lower part. The rear side support rod 25 is provided at a position substantially the same as the front side support rod 24, and the first backrest plate 3 is provided between the upper ends of the rear support rods 22 and 22 to each other. It is connected.
[0015]
The seat portion 4 supported by the support frames 2 and 2 is composed of a seat plate 40 with a cushion member attached to the upper surface and a seat frame 41 that supports the seat plate 40. Are provided with notch grooves 42 and 42 for receiving and engaging the front support rod 21 and the rear support rod 22 of each support frame 2, respectively, and in the state where the second backrest plate 5 is not provided, the seat portion 4 has the notch. It is possible to slide up and down between the first backrest plate 3 at the upper end and the front and rear lateral support rods 24 and 25 in the middle of the lower portion while being engaged with the support frame 2 through the groove 42. It is supported.
[0016]
Further, the seat frame 41 is a frame-like structure made up of front and rear, left and right support rods, which are provided slightly inside along the periphery of the lower surface of the seat plate, and the outer surfaces of the left and right support rods 43 are A plurality of screw holes 26 which are in contact with the inner side surfaces 21a and 22a of the front support rod 21 and the rear support rod 22 fitted in the notch groove 42 and are provided at predetermined intervals along the vertical direction of the inner side surface. The seat frame 41 is fixed to a predetermined height position between the support frames 2 and 2 by screwing the seat frame 41 into a predetermined screw hole selected among.
[0017]
In this example, a total of three screw holes 26 are continuously provided in the vertical direction on each inner side surface 21a (22a), and the mounting position of the seat portion 4 can be selected from these three screw holes 26 by selecting the upper and middle stages. The height can be changed in three stages.
In this way, the mounting position of the seat portion 4 can be changed along the height direction so that it can be adapted to the child's physique. FIGS. 1 and 2 show the state in which the seat portion 4 is mounted at the lower position 13. 3 and 4 show a state in which the seat portion 4 is attached to the upper stage position 15, and FIG. 5 shows a state in which the seat part 4 is attached to the middle stage position 14.
[0018]
In particular, when the seat 4 is attached to the lower lower position 13, the second backrest plate 5 is located between the front supports 21, 21 above the seat and in front of the support frame 2. Is handed over. At the left and right end portions of the second backrest plate 5, mounting rods 50, 50 that contact the inner surface of the front support rod 21 are respectively extended downward, and the mounting rod 50 is connected to the inner surface. The second backrest plate 5 is placed at a predetermined height between the two front supports 21 and 21 by screwing to the front supports 21 and 21.
[0019]
The mounting rod 50 is screwed using the remaining two screw holes 26, 26 for mounting the seat portion 4 to the upper and middle stages in each front support rod 21, and thus the seat portion 4 is fixed to the lower position 13. When the backrest plate 5 is attached using a screw hole that is not used, it is not necessary to provide a new attachment portion, and the manufacturing cost is reduced.
[0020]
In this example, three screw holes 26 are provided continuously along the vertical direction of the support frame 2 so that the height of the seat portion 4 can be adjusted in three stages, and only when the seat portion is attached to the lower position. Although what has been shown to attach the two backrest plates 5 is shown, the present invention is not limited to such a configuration. For example, four or more screw holes are connected in series, and the height of the seat can be adjusted in four or more stages. It is also preferable that the height of the seat portion 4 can be adjusted even when the second backrest plate is attached, or the height of the second backrest plate 5 can be adjusted. It is also preferable that the number of the screw holes is two or less, and the height of the seat portion is made adjustable in two steps up and down, or the height is not adjustable, and the screw holes 26 are used for mounting the second backrest plate 5. Of course, it is possible to provide a separate attachment means.
[0021]
The second backrest plate 5 attached in this way is provided at a position lower than the rear first backrest plate 3, so that the physique of a child or the like using the second backrest plate 5 can be obtained. Although it is set to a predetermined height, it may be the same height or a position higher than the first backrest plate 3.
[0022]
Between the first back plate 3 and the second back plate 5, an extra space S surrounded by the back plates 3, 5, the left and right support frames 2, 2 and the seat 4. And is configured to be usable as a storage space for storing small items such as bags. In addition, in order to prevent the fall of the stored item from the open part between the 1st backrest board 3 and the rear-end part of the seat part 4, the lower end part of the 1st backrest board 3 is the 2nd The upper and lower widths of the backrest plate 3 are widened so as to be at substantially the same height as the lower end portion of the backrest plate 5 to reduce the open area, or the rear end portion of the first backrest plate 3 and the grounding saddle It is preferable that a single or a plurality of vertical rods are erected between the rear end portions of 20.
[0023]
On the other hand, when the child grows up, when the seat 4 is raised and the second backrest plate 5 is removed and the first backrest plate 3 is used for seating, the removed second back is removed. It is preferable to attach the baffle plate 5 at an appropriate place that does not interfere with the seating of the chair 1.
[0024]
6 shows a front support rod 21 on the lower side of the seat surface by screwing a support rod 50 into the middle and lower screw holes 26, 26 that are not used when the seat 4 is attached to the upper position 15. An example in which the second backrest plate 5 is attached between 21 is shown. In this example, the above-mentioned front lateral support rod 24 is omitted from the beginning so that the attachment is possible, and the seat portion 4 is attached to the upper position. This lack of strength of the support frame 2 is reinforced by the function of the attached second backrest plate 5 as a horizontal rail, and the stability of the chair 1 as a whole is ensured. Thereby, since the front horizontal support rod 24 can be omitted, the number of parts can be reduced and the cost can be reduced.
[0025]
FIG. 7 shows an example in which the removed second backrest plate 5 is laterally attached to the lower end portion of the rear support rod 22 and positioned along the upper portion of the grounding rod 20 at the bottom, and FIG. An example is shown in which the backrest plate 5 is attached to the front end portion of the ground rod 20 so as to protrude forward, and the back surface of the backrest plate 5 can be used as a footrest. In addition, the removed second backrest plate 5 may be provided between the first backrest plate 3 and the seat portion 4 in the rear support 22.
[0026]
The support frame 2 of the present example is configured in a frame shape from the front support 21 and the rear support 22, but it is also possible to further erect a vertical support in parallel between these supports. Moreover, you may comprise the whole support frame with a single or several plate-shaped member. In the case of a plate-shaped member, the first backrest plate 3 may be provided at the rear end, and the second backrest plate 5 may be detachably attached to the front end or a predetermined position in the front-rear direction.
[0027]
Further, the front support 21 and the rear support 22 are substantially the same height, and a cross rail 23 is provided between the upper ends. As shown in FIGS. 9 and 10, the front support 21 of the support frame 2 is provided. The height of the upper stage screw hole 26 may be set to a height that is low enough to allow the upper stage screw hole 26 to be formed, and the horizontal beam 23 may be horizontally extended from the upper end toward the rear support 22. According to this, in the usage pattern in which the second backrest plate of FIG. 9 is used for seating, the presence of the front support protruding above the backrest plate 5 is eliminated, and the first of FIG. Even in the usage form of sitting using the backrest plate, the presence of the front support rod protruding above the seat portion and the horizontal rail at the upper end thereof is eliminated, and the degree of freedom of the posture is also improved.
[0028]
Further, the second backrest plate 5 is attached to the front support rod 21 via the attachment rods 50 at both ends. However, both ends of the backrest plate 5 can be directly screwed to the front support rod 21, or other structures can be used. It is also possible to attach via an attachment member.
In this example, each component such as the support frame 2, the backrest plates 3 and 5, the lateral support rods 24 and 25, and the seat plate 40 is mainly made of wood, but a part or the whole is made of metal or synthetic resin. Of course, it is also a preferred embodiment to be made of a member made of metal.
[0029]
【The invention's effect】
As described above, according to the chair of the present invention, the second backrest plate can adjust the depth from the front end of the seat portion to the backrest according to the length of the thigh of a small seated person such as a child. When the child grows up, the second backrest plate 5 can be removed from the position and can be seated using the first backrest plate. Without using a complicated mechanism for sliding and rotating, the backrest position can be adjusted by attaching and removing the second backrest plate, which can reduce the manufacturing cost and cause backlash. A difficult and stable chair can be provided.
[0030]
More specifically, the mounting position of the seat portion with respect to the rear support and the front support constituting the support frame can be changed along the height direction, and in the case of a small seated person such as a child, The seat portion is attached to a lower position, and the second backrest plate is provided via the attachment rod at a predetermined height of the rear support rod extending upward from the seat portion. Thus, it is possible to detachably attach the attachment saddle of the second backrest plate using attachment means for attaching the seat portion to the upper position.
[0031]
In addition, since a surplus space is provided between the first back plate and the second back plate that are provided above the seat, it is convenient to store small items such as school bags and bags.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a chair according to an exemplary embodiment of the present invention.
FIG. 2 is a sectional view of the same.
FIG. 3 is a perspective view showing a state in which a second backrest plate is removed and a seat portion is attached to an upper position.
FIG. 4 is a sectional view of the same.
FIG. 5 is a cross-sectional view showing a state in which the seat is attached to the middle position.
FIG. 6 is a cross-sectional view showing a state in which a second backrest plate that is not used between the front support rods on the lower side of the seat surface is attached.
FIG. 7 is a cross-sectional view showing a state in which the removed second backrest plate is attached to the lower end of the rear support in the lateral direction.
FIG. 8 is a cross-sectional view showing a state in which a backrest plate is protruded forward and attached to a tip end portion of a grounding rod.
FIG. 9 is a perspective view showing a modified example in which the height of the front support rod is set to a low height at which the upper screw hole can be formed.
FIG. 10 is a perspective view showing a state in which the seat is similarly attached to the upper position.
[Explanation of symbols]
S Excess space 1, 1A Chair 2 Support frame 3 First backrest plate 4 Seat portion 5 Second backrest plate 10 Upper rear portion 12 Middle height direction 13 Lower position 14 Middle position 15 Upper position 20 Grounding rod 21 Front Support rod 21a Inner side surface 22 Rear support rod 22a Inner side surface 23 Cross rail 24 Front horizontal support rod 25 Rear horizontal support rod 26 Screw hole 40 Seat plate 41 Seat frame 42 Notch groove 43 Support rod 50 Mounting rod

Claims (5)

A chair in which a first backrest plate is provided at an upper rear portion between left and right support frames extending in a height direction, and a seat portion is provided in the middle of the height direction, wherein the support frame includes the seat portion. A rear support for supporting the rear end of the rear support and at least a front support for supporting the seat in front of the rear support, between the upper ends of the rear support extending above the seat, A first backrest plate is provided, and a second backrest plate is extended downwardly at the left and right end portions between the front support rods, which also extend upward from the seat portion. A chair, wherein the chair is detachably mounted and attached via a mounting rod that comes into contact with the inner surface of the bag. The mounting position of the seat with respect to the rear support and the front support constituting the support frame can be changed along the height direction, and the seat is mounted at a lower position and above the seat. The chair according to claim 1, wherein the second backrest plate is passed through the mounting rod at a position of a predetermined height of the rear support rod extending in the direction . The chair according to claim 2 , wherein the attachment rod of the second backrest plate is detachably attached using attachment means for attaching the seat portion to an upper position.   The chair according to any one of claims 1 to 3, wherein the second backrest plate is attached to a predetermined position lower than the first backrest plate.   The chair of any one of Claims 1-4 which provided the surplus space between the 1st backrest board and the 2nd backrest board which were extended over the said seat part.

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