JPH0668544U - Stackable chairs - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a stackable chair that can reduce the stacking pitch to improve the storage efficiency and does not damage the upper surface of the seat plate of another chair located below. With the goal. [Structure] In a stackable chair in which the lower surface side of the seat plate and the rear surface side of the backrest plate are in close contact with the upper surface of the seat plate and the front face of the backrest plate of another chair positioned below, the stackable chair is placed horizontally on the leg frame 1. The seat plate 2 is placed on the provided support plates 17 and 18, and the seat plate is fastened with a set screw penetrating from below the support plate, and at the same time, the screw shaft of the set screw is inserted and its head is A cushioning tool 40 having a mounting hole that can be embedded is provided on the lower surface of the support plate by the set screw.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a stackable chair, and more particularly to a chair that can be reduced in stacking pitch to improve storage efficiency.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there are provided various stackable chairs in which the lower surface side of the seat plate and the rear surface side of the backrest plate are located on the upper surface of the seatplate and the front surface of the backrest plate of another chair located below and stacked.

Then, in a stackable chair having a structure in which a seat plate is placed on a support plate provided laterally on the leg frame and fastened with a set screw penetrating from below the support plate, the set screw The head is designed not to damage the upper surface of the seat plate of the chair located below. For example, make sure that there is a sufficient gap between the upper surface of the lower seat and the lower surface of the upper seat so that the heads of the setscrews do not come in contact with the upper surface of the lower seat. There is provided a structure in which a stopper projectingly supports the lower end of the leg frame of the chair located above is provided, and a structure in which the leg frames of the chairs located above and below overlap each other.

However, providing a sufficient space between the upper surface of the seat plate of the lower chair and the lower surface of the seat plate of the upper chair causes the stacking pitch to increase and causes a decrease in storage efficiency. On the contrary, if the above-mentioned interval is made small for the purpose of improving the storage efficiency, the upper surface of the seat plate of the lower chair may be scratched and scratched by the head of the set screw when stacking.

[0005]

[Problems to be solved by the device]

 In view of the above situation, the present invention is to solve the problem that the stacking pitch can be reduced to enhance the storage efficiency and the upper surface of the seat plate of another chair located below is not damaged. The point is to provide a possible chair.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is stacking in which the lower surface side of the seat plate and the rear surface side of the backrest plate are closely attached to the upper surface of the seat plate of another chair located below and the front face of the backrest plate. In a possible chair, place the seat plate on the support plate that is installed laterally on the leg frame, fasten the seat plate with the set screw that penetrates from below the support plate, and at the same time insert the screw shaft of the set screw. In addition, a stackable chair is constructed in which a cushioning tool having a mounting hole in which the head portion can be buried is projected on the lower surface of the support plate with the set screw.

[0007]

[Action]

 According to the stackable chair of the present invention having the above-mentioned contents, when the seat plate placed on the support plate laid laterally on the leg frame is fastened with the set screw penetrating from below the support plate, The screw shaft of this set screw is inserted into the mounting hole of the shock absorber in advance and screwed into the seat plate in that state to fasten the seat plate and at the same time to project the shock absorber on the lower surface of the support plate. In this state, the head of the set screw is buried in the mounting hole of the shock absorber, so that only the shock absorber comes into contact with the upper surface of the seat plate of the other chair. The stacking pitch can be set small by setting the thickness of the shock absorber to the minimum necessary thickness.

[0008]

【Example】

 The present invention will be further described in detail with reference to the embodiments shown in the accompanying drawings. 1 to 6 show a typical embodiment of a stackable chair according to the present invention, in which 1 is a leg frame, 2 is a seat plate, 3 is a backrest plate, and 4 is a backrest back cover. There is.

The leg frame 1 has a pair of left and right legs, and a front leg rod 6 and a rear leg rod 7 are erected from the front and rear ends of a grounding rod 5 that comes into contact with the floor surface, and the front leg rod 6 is a vertical rod. 8 and a horizontal rod 9 extending rearward from the upper end thereof, and a first backrest rod 10 extending upward from the rear end of the horizontal rod 9, and the rear leg rod 7 has at least the horizontal rod 9 of the horizontal rod 9. The structure has an inclined rod 11 extending to a position and slightly inclined forward, and a second backrest rod 12 extending upward from the upper end of the first backrest rod 10 continuously from the inclined rod 11. Then, the first backrest rod 10 is positioned inside the second backrest rod 12 so that the front leg rod 6 and the rear leg rod 7 do not collide with each other. Further, the upper ends of the first backrest rod 10 and the second backrest rod 12 are curved inward to form a lower support rod 13 and an upper support rod 14, respectively, which are positioned above and below a substantially vertical line. In addition, a lower receiving rod 15 is welded and connected between the lower supporting rods 13 and 13, and an upper receiving rod 16 is welded and connected between the upper supporting rods 14 and 14. Further, steel supporting plates 17 and 18 are welded and connected between the horizontal rods 9 and 9 of the front leg rod 6 and to the front and rear portions thereof.

Then, in a state where the seat plate 2 is placed on the front and rear support plates 17 and 18, they are fastened and fixed by setscrews 19 that penetrate the support plates 17 and 18 from below. . Further, the backrest plate 3 has front open bearing recesses 20 formed in the upper and lower portions of both side edges of the shell-shaped backrest back cover 4, respectively. The lower support rods 13 and 13 and the upper support rods 14 and 14 respectively. Is fitted to the backrest back cover 4 from the front and fixed by only screwing or fitting, and the lower support rod 13 and the upper support rod 14 are fitted together. It is pivotally supported.

In the present embodiment, the seat plate 2 and the backrest plate 3 are covered with a cushion 23 on the surface side of a base plate 21 made of synthetic resin and covered with a cloth 23. However, the structure is not particularly limited.

Next, the structure for mounting the seat plate 2 on the leg frame 1 will be described in detail. As shown in FIG. 1 and FIG. 3, the front support plate 17 has press-molded downwardly formed mounting bases 24, ... The mounting base 24 has a recess 25 that opens upward, and a circular opening 27 is formed in the center of the bottom surface 26 of the mounting base 24. On the other hand, a projecting portion 28 that engages with the mounting base 24 is formed at a position corresponding to the mounting base 24 on the lower surface of the base plate 21 that constitutes the seat plate 2, and the projecting portion 28 is in the recess 25. And a projecting base 30 engaging with the inside of the opening 27 at the center of the lower surface thereof, and a screw hole 31 is formed in the center of the projecting base 30.

Further, as shown in FIGS. 1 and 4, the rear support plate 18 is press-molded with mounting bases 32, ... The mounting base 32 projects downward and forms a recess 33 that is open upward and forward, and an opening 35 having the same shape as the opening 27 is formed in the center of the bottom surface 34 of the mounting base 32. On the other hand, a protrusion 36 having the same shape as the protrusion 28 is formed on the lower surface of the substrate 21 at a position corresponding to the mounting base 32. The protrusion 36 has a base 37, a protrusion 38 and a screw hole similarly to the above. It consists of 39.

Then, in the recesses 25, 33 of the mounts 24, 32 of the support plates 17, 18, the bases 29, 37 of the protrusions 28, 36 projecting from the lower surface of the base plate 21 of the seat plate 2 are respectively provided. At the same time, the protrusions 30 and 38 are engaged with the openings 27 and 35, respectively, and the setscrew 19 inserted into the shock absorber 40 from below is screwed into the screw holes 31 and 39 so that the seat plate 2 , And at the same time that the shock absorbers 40, ... Are projectingly provided on the lower surfaces of the support plates 17, 18. Here, the shock absorber 40 is made of synthetic rubber or soft synthetic resin and is molded into an inverted truncated cone shape. The screw shaft 41 of the set screw 19 is inserted into the central portion of the shock absorber 40, and the head 42 of the shock absorber 40 is inserted. It has a mounting hole 43 that can be locked in a buried state. In the present embodiment, a countersunk screw is exemplified as the set screw 19, and the shape of the mounting hole 43 is set accordingly. The shape of the mounting hole 43 depends on the shape of the head 42 of the set screw 19. It is changed appropriately.

The thickness of the shock absorber 40 is set to the minimum necessary thickness that has sufficient strength to fasten the seat plate 2 with the set screw 19 and can bury the head 42 of the set screw 19. The head 42 is prevented from protruding downward when it is attached to the support plates 17 and 18.

However, when a plurality of chairs A, B, C, ... According to the present invention are stacked as shown in FIG. 5 and FIG. 6, for example, when the upper chair B is stacked on the lower chair A, Of the cushion B, which protrudes from the lower surface side of the seat plate 2 of the chair B, and the upper surface of the seat plate 2 and the front surface of the back plate 3 of the other chair A, which is located below the back side of the backrest plate 3. Can be closely attached to. The same applies to the relationship between the lower chair B and the upper chair C. In this way, since the head 42 of the set screw 19 for mounting the seat plate 2 of the upper chair does not directly contact the upper surface of the seat plate 2 of the lower chair, there is no risk of damaging the seat plate 2. There is no. Further, in the present embodiment, in order to stabilize the stacked state, a stopper for mounting the landing rod 5 of the upper chair on the front leg rod 6 of the leg frame 1 and the outer lower portion of the vertical rod 8. 44, 44 are projected.

Further, as shown in FIGS. 7 and 8, the backrest plate 3 has the lower support rods 13, 13 and the upper support rods 14, 14 on the reinforcing ribs 45, 45 provided on both side edges of the back surface thereof. Bearing receiving recesses 46, ..., Which are respectively received, are formed, and the lower supporting rods 13 and the upper supporting rods 14 are rotatably supported by the bearing recesses 20 ,. A lower reinforcing rib 47 for stopping the lower end of the lower receiving rod 15 and an upper reinforcing rib 48 for stopping the upper and lower ends of the upper receiving rod 16 are projectingly provided in the central portion of the upper receiving rib 16 in the vertical direction. A notch 49 having a diameter sufficiently larger than the outer diameter of the upper receiving rod 16 is formed in the upper and lower central portions of the upper reinforcing rib 48.

From the initial state shown in FIG. 8, when a rearward leaning force acts by leaning on the backrest plate 3, the rear leg rod 7 inclines rearward and the backrest plate 3 Tilts rearward around the upper support rod 14 and the pivotal support portion of the lower support rod 13 shifts obliquely upward to the front, whereby the horizontal rod 9 rear portion of the front leg rod 6 is lifted up through the first backrest rod 10 and vertically. Although the rod 8 leans forward a little, a downward load is applied to the horizontal rod 9 of the front leg rod 6 depending on the weight of the seated person sitting on the seat plate 2. Therefore, this load and the backrest plate 3 The balance with the load is maintained. This state is the locking state as shown in FIG. At this time, in the initial state, the lower end of the central portion of the lower rod 15 is in contact with the lower reinforcing rib 47, and the lower end of the central portion of the upper rod 16 is in contact with the lower end of the notch 49 of the upper reinforcing rib 48. ing. On the other hand, in the locked state, the lower end of the central portion of the lower rod 15 is separated from the lower reinforcing rib 47, and the lower end of the central portion of the upper rod 16 is stopped by the upper end of the notch 49 of the upper reinforcing rib 48. It regulates the backward leaning.

In addition, as the structure of the seat plate 2 shown in FIGS. 10 to 12, the cushion body 22 is not directly attached to the substrate 21 as described above, but is made of a synthetic resin that functions as the substrate 21. The inner shell 51 made of synthetic resin to which the cushion body 22 is attached is detachably attached to the outer shell 50. When replacing the cushion body 22, it is preferable to make the inner shell 51 as thin and lightweight as possible from the viewpoint of cost and resource saving, but warping may occur during molding of the inner shell 51. Deformation may occur when the cloth 23 is stretched. Therefore, in the present embodiment, the outer shell 50 has a large thickness to ensure strength, and the inner shell 51 is formed thin and lightweight so that when the inner shell 51 is attached to the outer shell 50, The inner shell 51 is designed to be able to correct warpage and deformation.

Specifically, undercut portions 52 are formed at appropriate places on the outer peripheral rising edge of the outer shell 50, and claw pieces 53 that engage with the undercut portions 52 are provided at corresponding positions of the inner shell 51. , Are formed by integral molding, and a plurality of ribs 54, ..., Which suppress deformation, are arranged in parallel on the lower surface of the inner shell 51. FIG. 13 (a) shows an extremely curved and deformed inner shell 51, (b) shows a moderately curved normal shape, and (c) shows a flatly deformed inner shell 51. When the inner shell 51 is attached to the outer shell 50, the deformation of the outer shell 50 is corrected to a normal shape by the rigidity of the outer shell 50. Although the seat plate 2 has been described in this embodiment, a similar structure can be adopted for the backrest plate 3 and it can be applied to general cushion products.

[0021]

[Effect of device]

 According to the stackable chair of the present invention as described above, the lower surface side of the seat plate and the back surface side of the backrest plate are brought into close contact with the upper surfaces of the seat plates of other chairs located below and the front face of the backrest plate. In a stackable chair that can be stacked, a seat plate is placed on a support plate that is installed laterally on the leg frame, and the seat plate is fastened with a set screw that penetrates from below the support plate, and at the same time, the screw shaft of the set screw. When the upper chairs are stacked on top of the lower chairs, a cushioning tool that has a mounting hole through which the In addition, there is no possibility that the cushioning tool will come into contact with the upper surface of the seat plate of the lower chair, and the head of the set screw will not damage the upper surface of the seating plate, and the thickness of the cushioning tool will be suppressed to the minimum necessary. Can be set smaller, which improves the efficiency of delivery. Than it is.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a chair to which the present invention is applied.

FIG. 2 is a bottom view of a seat plate.

FIG. 3 is a cross-sectional view of essential parts in a state where a seat plate is attached to a front support plate.

FIG. 4 is a cross-sectional view of essential parts in a state where a seat plate is attached to a rear support plate.

FIG. 5 is a perspective view of the chair of the present invention in a stacked state.

FIG. 6 is a side view of the same.

FIG. 7 is a partially omitted rear view showing the relationship between the backrest plate and the lower and upper receiving rods.

FIG. 8 is an abbreviated side view showing the initial state of the backrest plate in a partial cross section.

FIG. 9 is an abbreviated side view showing a locking state of a backrest plate in a partial cross section.

FIG. 10 is a plan view of an outer shell forming a seat plate.

FIG. 11 is a plan view of an inner shell forming a seat plate.

FIG. 12 is a sectional view of a main part of a seat plate.

13A and 13B are simplified front views of the inner shell, in which FIG. 13A shows an example of curved deformation, FIG. 13B shows a normal example, and FIG. 13C shows an example of flat deformation.

[Explanation of symbols]

1 leg frame 2 seat plate 3 backrest plate 4 backrest back cover 5 grounding rod 6 front leg rod 7 rear leg rod 8 vertical rod 9 horizontal rod 10 first backrest rod 11 tilt rod 12 second backrest support rod 14 upper support rod 15 lower receiving rod 16 upper receiving rod 17 support plate 18 support plate 19 set screw 20 bearing recess 21 substrate 22 cushion body 23 cross 24, 32 mounting base 25, 33 recess 26, 34 bottom 27, 35 opening 28 , 36 Projection part 29, 37 Base part 30, 38 Projection part 31, 39 Screw hole 40 Buffer tool 41 Screw shaft 42 Head part 43 Mounting hole 44 Stopper 45 Reinforcing rib 46 Bearing recess 47 Lower reinforcing rib 48 Upper reinforcing rib 49 Notch 50 Outer shell 51 Inner shell 52 Undercut portion 53 Claw piece 54 Rib

Claims (1)

[Scope of utility model registration request] 1. A stackable chair in which the lower surface side of the seat plate and the back surface side of the backrest plate are stacked in close contact with the upper surface of the seat plate and the front face of the backrest plate of another chair positioned below,
A seat plate is placed on a support plate provided laterally on the leg frame, and the seat plate is fastened with a set screw penetrating from below the support plate, and at the same time, a screw shaft of the set screw is inserted and its head is attached. A stackable chair, characterized in that a cushioning tool having a mounting hole that can be buried is provided on the lower surface of the support plate by means of the set screw.