JP3617350B2 - Stacking chairs - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stacking chair, and more particularly to a stacking chair that can be stowed in the front-rear direction without a seat plate being raised upward and can be stored without taking up space.
[0002]
[Prior art]
Conventionally, a chair that can stack a plurality of chairs in the front-rear direction without load on the seat plate has been provided. This type of chair has a seating plate and a backrest plate attached to a frame that can be stacked in the front-rear direction, and the seating plate when not seated is set at an appropriate angle that rises forward and tilts. When stacking, the seat plates are stacked one on top of the other and stored.
[0003]
However, in the conventional stacking chair, those having an appropriate inclination angle suitable for sitting are poor in stacking property because the stacking pitch is long. Therefore, if the inclination angle of the seat plate is increased in order to improve stacking performance, the seat plate angle becomes too steep and the comfort at the time of sitting is impaired.
[0004]
In order to improve stacking performance, there is a type of chair in which the rear portion of the seat plate is attached to the rear portion of the frame so that the seat plate can be turned up and down, and the seat plate stands up when stacking. It is necessary to provide a support portion, which complicates the structure, and it is difficult to provide an elastic cushioning property for the seat plate.
[0005]
[Problems to be solved by the invention]
In view of the above-mentioned situation, the present invention intends to solve the problem in a stacking chair in which the seat plate can be stacked in the front-rear direction without the seat plate being lifted forward when not seated, without impairing the comfort when seated. The present invention is to provide a stacking chair which improves stacking efficiency by improving stacking performance and has an elastic cushioning property when seated.
[0006]
[Means for Solving the Problems]
The present invention is, for the aforementioned problem solution, a stacking chair comprising attaching a seat plate to the frame of the stackable structure in the longitudinal direction and the backrest plate, the frame, the front on the left and right Ashi杆and after The leg rods are raised and formed, and the left and right sides of the front leg rods and rear leg rods are connected by grounding rods that are displaced inwardly toward the rear. Connected by a back support rod at the rear end, and both rear leg rods are set so that the upper end is a free end and the outer interval between both rear leg rods is narrower than the inner interval between both front leg rods. The rear part of the seat plate is fixed to the upper end of the leg pad, and the front part of the seat board can be displaced up and down using the elasticity of the frame along the front leg pad, and the front part of the seat plate is inclined without sitting. stackable to set the front-rear direction is inclined upwards, the front and rear Upon stacking the direction, the frame of the front of the chair with fit inside of the rear of the chair frame, the seat plate in front of the chair overlapping below the seat plate of the rear of the chair, also the seat plate in a seating state A stacking chair was constructed in which the front part was lowered and locked to a locking part provided on the frame.
[0007]
Here, along the back side of the front leg rod, there is provided an arc-shaped support rod with the lower end of the rear leg rod approximately at the center, and slides on the support rod with guides attached on both sides of the front portion of the seat plate. It is preferable to be connected. Further, the rear portions of the both support rods are connected by a connecting rod, and upper and lower portions of a backrest plate are attached to the backrest supporting rod and the connecting rod. Furthermore, a locking portion is provided on the back side of the support rod, and a pair of upper and lower connecting tools for preventing the support rod from being pulled out is provided inside the guide tool. It is more preferable that the upper connecting tool is abutted against the upper end of the locking portion while being abutted against the lower end of the retaining portion.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. 1 and 2 show a stacking chair according to the present invention, and FIGS. 3 to 5 show the main parts thereof, in which 1 is a frame, 2 is a seat plate, 3 is a backrest plate, 4 is a support rod, Reference numeral 5 denotes a guide, and 6 denotes a locking portion.
[0009]
As shown in FIGS. 1 to 3, the frame 1 has a structure that can be stacked in the front-rear direction. The front leg rod 7 and the rear leg rod 8 are formed in a substantially C shape when viewed from the side, and the front leg rod 7 and the rear leg rod 8 are displaced inwardly toward the rear in the left and right sides. The front legs 7 and 7 are connected to each other by a hook 9, and the front legs 7 and 7 are curved and extended rearward and connected to each other by back support bars 10 that are curved at the rear ends. The structure is a free end. That is, when the stacking in the front-rear direction is set so that the outer space between the rear foot rods 8 and 8 is sufficiently narrower than the inner space between the front foot rods 7 and 7, the frame 1 of the front chair is rearward. It fits inside the frame 1 of the chair, and the front leg rod 7 of the front chair is positioned above the front leg rod 7 of the rear chair.
[0010]
Further, arc-shaped support rods 4 and 4 are provided along the back sides of the front leg rods 7 and 7 of the frame 1, respectively, with the lower ends of the rear leg rods 8 and 8 being substantially centered. Here, both the support rods 4, 4 are bent at a front lower end portion into a substantially J shape in a side view as a connection portion 4 A, and the front end portion of the connection portion 4 A is on the back side of the curved portion of the front leg rods 7, 7. Welding. Block-shaped locking portions 6 and 6 project from the back sides of the support rods 4 and 4 on the left and right sides, respectively. The rear portions of the support rods 4 and 4 are connected by a connecting rod 11, and the upper and lower portions of the backrest plate 3 are attached to the backrest supporting rod 10 and the connecting rod 11. Further, a rear horizontal rod 12 is connected between the upper ends of the rear leg rods 8 and 8. The rear heel 12 includes a fixing portion 12A fixed from the seat plate 2 along the inner side of the rear leg ridge 8, and a connecting portion that curves and extends forward from both the fixing portions 12A to the rear leg ridges 8, 8. 12B. By retracting the connecting portion 12B forward, the legs of the seated person on the rear side are prevented from hitting the back recumbent arm 12.
[0011]
In the frame 1 constructed as described above, both side portions of the rear portion of the seat plate 2 are fixed so that the seat plate 2 is in an upwardly inclined state, and the guide 5 is attached to both sides of the front portion of the seat plate 2. The two support rods 4 and 4 are slidably connected. That is, the seat plate 2 is not seated, and the front portion is inclined obliquely upward at a relatively large angle, and can be stacked in the front-rear direction with a small stacking pitch. When seated, the front portion of the seat plate 2 is guided by the support rod 4 and the guide 5 and can be displaced up and down using the elasticity of the frame 1 along the front leg rod 7. When the horizontal state is reached, the guide 5 is abutted against the locking portion 6 of the support rod 4, and further downward displacement is restricted.
[0012]
The structure of the guide 5 is not particularly limited as long as it supports the front portion of the seat plate 2 and guides the front portion of the seat plate 2 along the support rod 4. What is illustrated as an example of the guide 5 is a metal support member 13 having a substantially U-shaped cross-section so as to surround the support rod 4, and is fitted into the periphery of the support member 13. The slider member 14 is made of a synthetic resin, and further includes a pair of upper and lower connectors 15 and 15 that are secured to the support rod 4. The lower connecting tool 15 is abutted against the lower end of the locking part 6 in the non-sitting state, and the upper connecting tool 15 is abutted against the upper end of the locking part 6 in the seated state.
[0013]
The specific structure of this guide 5 is shown in FIG. That is, the support member 13 has a structure in which a steel plate is bent and turned around, and the mounting holes 17 and 18 of the connector 15 are formed in pairs at both ends of the side plates 16 and 16. Yes. One mounting hole 17 is larger in diameter than the other mounting hole 18. The slider member 14 is formed in a shape that matches the shape of the inner peripheral edge of the support member 13 and can cover the peripheral edge portion, and is provided at a position corresponding to the mounting holes 17 and 18. Through holes 19 and 19 having the same diameter as 17 are formed. The connector 15 includes a headed cylindrical screw 20 having a threaded inner peripheral surface and a headed shaft screw 21 having a threaded outer peripheral surface, that is, a normal screw. With the slider member 14 fitted, the cylindrical screw 20 inserted from the front side of the support rod 4 and inserted from one mounting hole 17 is inserted through the through holes 19 and 19 and inserted from the other mounting hole 18. The shaft screw 21 is screwed onto the cylindrical screw 20 to prevent it from being removed. The support member 13 is fixed to both side portions of the seat plate 2 by an appropriate method.
[0014]
Here, a separate cylindrical slider may be extrapolated to both the couplers 15 and 15 so that the slider is in sliding contact with the back surface of the support rod 4, but in the present embodiment, the support member 13, Since the rear side of the slider member 14 is open, the cylindrical portion 22A of the finger padding prevention member 22 is inserted into both the couplers 15 and 15, and the opening portion of the support member 13 is opened by the intermediate closing plate 22B. It is blocking. In addition, the space | interval of the inner back part of the said slider member 14 and the cylindrical part 22A of the said finger padding prevention member 22 is set larger than the diameter of the said support rod 4, and the clearance is provided.
[0015]
Here, the radius of curvature of the support rod 4 is set to increase as it goes downward with the lower end portion of the rear leg rod 8 as the center. The same applies even if the support rod 4 is an arc and the center of the circle is set behind the lower end of the rear leg rod 8. When the front part of the seat plate 2 descends as the rear leg collar 8 is elastically tilted forward when seated on the seat board 2, the cylinder of the support collar 4 and the finger padding prevention member 22 is initially shown in FIG. The part 22A is separated from the back side of the support rod 4, and thereafter, the support rod 4 and the front leg rod 7 are pushed forward while being slid downward. At the time of sitting, when the body weight is light, the frame 1 is stopped in a state where the elastic restoring force and the body weight are balanced, and when the body weight is heavy, the guide 5 is stopped by the engaging portion 6 protruding from the support rod 4. The seat plate 2 becomes substantially horizontal. Further, when leaning on the backrest plate 3, if the weight is heavy, the backrest plate 3 is strongly pushed backward, so that the frame 1 is elastically tilted backward with a larger deformation amount. Thereby, even if the weight applied to the seat plate 2 is heavy, the contact pressure of the coupling tool 15 of the guide tool 5 or the cylindrical portion 22A of the finger padding prevention member 22 with respect to the support rod 4 increases, The resistance to the downward movement increases. Therefore, the stacking chair of the present invention is a weight-sensitive chair because the elastic force of the seat plate 2 increases according to the weight of the seated person.
[0016]
Instead of the guide 5 having the above-described structure, a linear slider or the like that slides and moves in a state of being completely in contact with the support rod 4 may be used. Further, the support rod 4 may be removed, and the seat plate 2 may be slidably connected to the front leg rod 7 with a guide 5.
[0017]
FIG. 6 shows a state in which a plurality of chairs are stacked in the front-rear direction. In the non-seated state, the seat plate 2 is in a tilted state with a relatively large angle. The seat plates 2 and 2 of the front and rear chairs are sufficiently overlapped to reduce the stacking pitch.
[0018]
【The invention's effect】
Stacking chair according to the invention obtained by the above, a stacking chair comprising attaching a seat plate to the frame of the stackable structure in the longitudinal direction and the backrest plate, the frame, the front on the left and right Ashi杆and rear legs In addition to the formation of the heel, the front heel and the rear heel are connected by a ground heel that is displaced inwardly toward the rear on both the left and right sides. It is connected with a back support rod at the end, and both rear leg rods are set so that the upper end is a free end, and the outer interval between both rear leg rods is narrower than the inner interval between both front leg rods. The rear part of the seat plate is fixed to the upper end of the heel and the front part of the seat plate can be displaced up and down using the elasticity of the frame along the front leg heel. stackable set in the longitudinal direction inclined to the , Upon stacking the front-seat frame in front of the chair with fit inside of the rear of the chair frame, the seat plate in front of the chair overlapping below the seat plate of the rear of the chair, and in the seating state Since the front part of the board is lowered and locked to the locking part provided on the frame, the stacking performance in the front-rear direction can be improved and the storage efficiency can be improved without impairing the comfort when sitting. Moreover, it has an excellent function with an elastic cushioning property when seated.
[0019]
Further, an arcuate support rod is provided along the back side of the front leg rod, and the lower end of the rear leg rod is approximately centered, and the guide rod attached to both sides of the front portion of the seat plate can slide on the support rod. The seat plate is excellent in stability when seated, and can also be prevented from swinging left and right. Further, the rear portions of the two support rods are connected by a connecting rod. Since the upper and lower portions of the backrest plate are attached to the backrest supporting rod and the connecting rod, the backrest plate can be stably supported.
[0020]
A locking portion projects from the back side of the support rod, and a pair of upper and lower connection tools that prevent the support rod from being pulled out are provided inside the guide device. In addition to being in contact with the lower end of the stop portion, the upper coupling tool is in contact with the upper end of the locking portion in the seated state, so that the front portion of the seat plate is securely contacted when seated, and is substantially horizontal and stable. Can be realized.
[Brief description of the drawings]
FIG. 1 is a side view of a stacking chair according to the present invention.
FIG. 2 is a front view of the same.
FIG. 3 is an exploded perspective view showing a specific structure of the guide tool.
FIG. 4 is a partial longitudinal sectional view showing a state in which a front portion of a seat plate is slidably connected to a support rod by a guide tool.
FIG. 5 is a partial cross-sectional view of the same.
FIG. 6 is a side view showing a state in which a plurality of chairs are stacked in the front-rear direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Seat plate 3 Backrest plate 4 Supporting rod 5 Guide tool 6 Locking part 7 Front leg collar 8 Rear leg collar 9 Grounding collar 10 Backrest supporting collar 11 Connecting collar 12 Rear lateral collar 13 Supporting member 14 Slider member 15 Connecting instrument 16 Side plate 17 Mounting hole 18 Mounting hole 19 Through hole 20 Cylindrical screw 21 Axial screw 22 Finger filling prevention member 22A Cylindrical portion 22B Closure plate

Claims (4)

A stacking chair made by attaching a front and rear direction to the seat plate to the frame of the stackable structure and backrest plate, wherein the frame is adapted to raise forming up the respective left and right front Ashi杆and Koashi杆, left and right side portions The front leg heel and the rear leg heel are connected by a grounding heel that is displaced inward as it goes rearward, and both front leg heels extend while bending upward and are connected by a back support heel at the rear end, In addition, both rear leg rods are set so that the upper ends are free ends , and the outer distance between both rear leg rods is narrower than the inner distance between both front leg rods, and the rear part of the seat plate is fixed to the upper ends of the rear leg rods. At the same time, the front part of the seat plate can be displaced up and down using the elasticity of the frame along the front leg collar, and the front part of the seat plate can be tilted upward and stacked in the front-rear direction without sitting When you stack in the front-rear direction, The frame of the child together with the fit inside of the rear of the chair frame, the seat plate in front of the chair overlapping below the seat plate of the rear of the chair, also provided at the front is lowered frame of the seat plate in a seating state A stacking chair that is locked to the locking portion. An arc-shaped support rod having a substantially lower end of the rear leg rod is provided along the back side of the front leg rod, and is slidably connected to the support rod with guides attached on both sides of the front portion of the seat plate. The stacking chair according to claim 1. The tilting device for a chair according to claim 2, wherein rear portions of the both support rods are connected by a connecting rod, and upper and lower portions of a backrest plate are attached to the backrest supporting rod and the connecting rod. A locking portion protrudes on the back side of the support rod, and a pair of upper and lower connecting tools for preventing the support rod from being pulled out is provided inside the guide device, and the lower connection tool is placed on the locking portion in a non-sitting state. The chair tilting device according to claim 2, wherein the upper connecting member is stopped against the upper end of the locking portion in a seated state.

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