JP2577000Y2 - Stackable chairs - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair that can be stacked, and more particularly, to a chair that can reduce the stacking pitch and increase storage efficiency.

[0002]

2. Description of the Related Art Conventionally, there have been provided various stackable chairs which are stacked with the lower surface of a seat plate and the back surface of a backrest plate positioned below the upper surface of a seat plate of another chair and the front surface of a backrest plate. Have been.

[0003] In a stackable chair having a structure in which a seat plate is placed on a support plate laterally provided on a leg frame and fastened with a set screw penetrated from below the support plate,
The head of the set screw is designed not to damage the upper surface of the seat plate of the chair located below. For example, ensure that there is sufficient space between the upper surface of the lower chair and the lower surface of the upper chair so that the head of the set screw does not contact the upper surface of the lower seat. There are provided a structure in which a stopper protrudes and supports a lower end of a leg frame of an upper chair, and a structure in which leg frames of upper and lower chairs overlap with each other.

However, providing a sufficient space between the upper surface of the lower chair and the lower surface of the upper chair causes an increase in stacking pitch and lowers storage efficiency. Conversely, if the above-mentioned interval is reduced for the purpose of increasing the storage efficiency, the head of the set screw may scratch and damage the upper surface of the seat plate of the lower chair during stacking.

[0005]

SUMMARY OF THE INVENTION In view of the above-mentioned situation, the present invention is intended to solve the above problem by reducing the stacking pitch to increase the storage efficiency, and at the same time as the other chairs located below. It is an object of the present invention to provide a stackable chair that does not damage the upper surface of the seat plate.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing an upper surface of a seat plate of another chair which is positioned below a lower surface of a seat plate and a back surface of a backrest plate, and a backrest plate. in the in close contact with the front surface stackable and stacking chairs, projecting downwardly into multiple locations of the support plate which is horizontally provided on the leg frame
A recess forming a mounting base, the interior of the mounting base being open upward;
And an opening is formed in the center of the bottom surface of the seat plate.
The lower surface engages with the recess at a position corresponding to the mounting table.
And a projection facing the opening.
A screw hole is formed at the center of the protrusion, and the seat plate is placed on the support plate.
In a state in which the protrusion is engaged with the recess of the mounting base, a buffer having a mounting hole through which a screw shaft of a set screw can be inserted and a head thereof can be buried is provided on a lower surface of the mounting base. To the shock absorber
Screw the inserted set screw into the screw hole to turn the seat plate into the support plate.
At the same time as the fastening, a stackable chair was constructed in which a shock- absorbing member was projected from the lower surface of the support plate.

[0007]

The stackable chair according to the present invention, which has the above-described contents, has a seat plate on a support plate laid sideways on a leg frame.
Mounting bases to be placed and formed in multiple places on the support plate
The protrusion formed on the lower surface of the seat plate is engaged with the recess of
Screw the screw shaft of the set screw through the mounting
And screwed into the screw holes of the protrusions, so that the seat plate
The are of being projected simultaneously with the bumper fastened to the underside of the support plate to the support plate, the head of the set screw is buried in the mounting hole of the bumper in this state, the chair located below Only the cushioning member abuts on the upper surface of the seat plate. The stacking pitch can be set small by reducing the thickness of the shock absorber to the minimum necessary thickness. Further, the mounting portion provided on the projecting portion of the seat plate and the support plate may be provided.
Attachment position of seat plate to support plate by engagement with recess
Of the seat plate in the mounted state.
It regulates directional movement.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 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. .

The leg frame 1 has a pair of right and left sides, and a front leg rod 6 and a rear leg rod 7 are respectively formed upright from front and rear ends of a grounding rod 5 abutting on the floor surface. 8 and a horizontal rod 9 extending rearward from an upper end thereof, and a first backrest rod 1 extending upward from a rear end of the horizontal rod 9.
0, the rear leg rod 7 has an inclined rod 11 which extends at least to the position of the horizontal rod 9 and is slightly inclined forward, and the second rear leg rod 7 extends upward from the upper end of the first backrest rod 10 continuously. It has a structure having two backrest rods 12. Then, the first backrest rod 1 is moved from the second backrest rod 12.
0 is located inside, so that the front leg rod 6 and the rear leg rod 7 do not collide. Further, the upper end of the first backrest rod 10 and the upper end of the second backrest rod 12 are curved inward to form a lower support rod 13 and an upper support rod 14, respectively. And the lower support rod 1
While connecting the lower receiving rod 15 by welding between 3 and 13,
An upper receiving rod 16 is welded between the upper supporting rods 14,14. Further, steel support plates 17, 18 are welded to the front and rear portions between the horizontal bars 9, 9 of the front leg rod 6, respectively.

[0010] Then, the seat plate 2 is connected to the front and rear support plates 1.
7 and 18 are fixed by fixing screws 19,... Penetrating from below the support plates 17, 18. Further, the backrest plate 3 has a front opening bearing recess 2 formed on upper and lower sides of both side edges of a shell-shaped backrest back cover 4.
Are engaged with the lower support rods 13, 13 and the upper support rods 14, 14 from the rear, respectively, and are fitted to the backrest back cover 4 from the front and fixed only by screws or fitting. And is pivotally supported by the lower support rod 13 and the upper support rod 14.

In the present embodiment, the seat plate 2 and the backrest plate 3 are formed by covering a surface of a substrate 21 made of synthetic resin with a cushion body 22 therebetween and covering the surface 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 is provided with two substantially right and left mounting bases 24,.. The inside of the mounting base 24 is formed as a recess 25 opened upward, and a circular opening 27 is formed in the center of a bottom surface 26 thereof. On the other hand, a protrusion 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 substrate 21 that constitutes the seat plate 2. Base 2 accommodated in
9 and a protrusion 30 at the center of the lower surface thereof, which engages in the opening 27.
And a screw hole 31 is formed in the center of the protruding base 30.

As shown in FIGS. 1 and 4, the rear support plate 18 is provided at its front edge with two U-shaped mounting bases 32, each having a substantially U-shape in plan view, by press molding. The mounting base 32 projects downward and forms a recess 33 opening upward and forward, and an opening 35 having the same shape as the opening 27 is formed at the center of a bottom surface 34 thereof. On the other hand, a projection 36 having the same shape as the projection 28 is formed on the lower surface of the substrate 21 at a position corresponding to the mounting table 32, and the projection 36 is provided with a base 37, a projection 38 and a screw hole as described above. It consists of 39.

The mounting table 2 for the support plates 17, 18 is provided.
The bases 29 and 37 of the protruding portions 28 and 36 projecting from the lower surface of the base plate 21 of the seat plate 2 are accommodated in the recesses 25 and 33 of the seat plate 2, respectively.
7 and 35, and the setscrew 19 inserted into the buffer 40 from below is screwed into the screw holes 31 and 39 to fasten the seat plate 2 to the support plates 17 and 18, and at the same time, the buffer 4
Are provided on the lower surfaces of the support plates 17 and 18. Here, the cushioning member 40 is made of synthetic rubber or soft synthetic resin and is formed in an inverted truncated cone shape. The screw shaft 41 of the set screw 19 is inserted into the center portion, and the head portion 42 is It has a mounting hole 43 that can be locked in the buried state. In this embodiment, a countersunk screw is exemplified as the set screw 19, and the shape of the mounting hole 43 is set accordingly.
It is appropriately changed according to the shape of No. 2.

The thickness of the shock-absorbing member 40 is set to a minimum necessary thickness that has sufficient strength to fasten the seat plate 2 with the set screw 19 and that can bury the head 42 of the set screw 19. When mounted on the support plates 17 and 18, the head 42 is prevented from protruding downward.

Thus, the plurality of chairs A according to the present invention,
When B, C,... Are stacked as shown in FIGS.
For example, when the upper chair B is stacked on the lower chair A, the shock absorber 4 protruding from the lower surface side of the seat plate 2 of the upper chair B
.., The back side of the backrest plate 3 can be brought into close contact with the upper surface of the seat plate 2 of the other chair A positioned below and the front surface of the backrest plate 3. The same applies to the relationship between the lower chair B and the upper chair C. As described above, since the head 42 of the set screw 19 for attaching the seat plate 2 of the upper chair does not directly contact the upper surface of the seat plate 2 of the chair located below, there is no danger of damaging the seat plate 2. There is no. Further, in this embodiment, in order to stabilize the stacked state, the leg frame 1
A stopper 44 for supporting the grounding rod 5 of the chair located above the front leg rod 6 and the lower part outside the vertical rod 8.
44 are protruded.

As shown in FIGS. 7 and 8, the backrest plate 3 has reinforcing ribs 45, 4 provided on both side edges on the back surface thereof.
5, the lower supporting rods 13, 13 and the upper supporting rods 14,
Are formed, respectively, and the lower supporting rod 13 and the upper supporting rod 14 are rotatably supported by the bearing concave parts 20,... Of the backrest back cover 4, respectively, and further, the central part of the rear surface thereof. A lower reinforcing rib 47 for holding the lower end of the lower receiving rod 15 and an upper reinforcing rib 48 for holding the upper and lower ends of the upper receiving rod 16 project in the vertical direction. A notch 49 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.

When a rearward tilting force acts on the backrest plate 3 from the initial state shown in FIG. 8, the rear leg 7 tilts rearward and the backrest plate 3 moves upward. The support portion 14 is tilted rearward so that the pivot portion of the lower support portion 13 moves obliquely upward and forward, whereby the horizontal portion 9 of the front leg portion 6 is lifted up via the first backrest portion 10 and the vertical portion 8 is moved upward. Is slightly inclined forward, but a downward load acts on the horizontal rod 9 of the front leg rod 6 due to the weight of the occupant sitting on the seat plate 2, and this load and the leaning on the backrest plate 3 are applied. The balance with the load is maintained. This state is a locking state as shown in FIG. At this time, in the initial state, the lower end of the center of the lower rod 15 abuts on the lower reinforcing rib 47 and the upper rod 1
The lower end of the center of 6 is in contact with the lower end of the notch 49 of the upper reinforcing rib 48. On the other hand, in the locking state, the lower end of the central portion of the lower receiving rod 15 is separated from the lower reinforcing rib 47, and the lower end of the central portion of the upper receiving rod 16 is brought into contact with the upper end of the cutout 49 of the upper reinforcing rib 48, and It regulates backward tilt.

The structure of the seat plate 2 shown in FIGS. 10 to 12 does not directly attach the cushion body 22 to the substrate 21 as described above, but is made of a synthetic resin which functions as the substrate 21. The inner shell 51 made of a synthetic resin to which the cushion body 22 is attached is detachably attached to the outer shell 50 described above. When it is assumed that the cushion body 22 is replaced, it is preferable to make the inner shell 51 as thin and light as possible from the viewpoint of cost and resource saving. Deformation may occur during the work of stretching the 23. Therefore, in the present embodiment, the outer shell 50 is thickened to secure the strength, and
When the inner shell 51 is mounted on the outer shell 50, the inner shell 51
Warp and deformation can be corrected.

More specifically, undercut portions 52 are formed at a plurality of appropriate positions on the outer peripheral rising edge of the outer shell 50, and claw pieces 53, which engage with the undercut portions 52, at corresponding positions of the inner shell 51. Are formed by integral molding, and a plurality of ribs 54,... For suppressing deformation are provided on the lower surface of the inner shell 51 in parallel. FIG.
3 (a) shows an inner shell 51 which is extremely curved and deformed.
(B) shows a moderately curved normal shape, and (c)
Indicates a flat deformation, and when the inner shell 51 having these shapes 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. In the present embodiment, the seat plate 2 has been described. However, a similar structure can be employed for the backrest plate 3 and can be applied to a general cushion product.

[0021]

According to the stackable chair of the present invention as described above, the lower surface of the seat plate and the upper surface of the seat plate of the other chair located below the back side of the back plate are located on the lower surface of the back plate. In a stackable chair that is stacked in close contact with the front, it projects downward at multiple locations on the support plate
A mounting base is formed, and the inside of the mounting base is opened upward.
And an opening in the center of the bottom surface,
The concave portion is located on the lower surface of the seat plate and at a position corresponding to the mounting table.
And a projection engaging with the opening.
A screw hole is formed at the center of the protruding portion, and the seat plate is
And the projection is engaged with the recess of the mounting base.
A shock absorber having a mounting hole through which a screw shaft of a set screw can be inserted and a head thereof can be buried is provided on the lower surface of the mounting table,
Screw the set screw inserted into the shock absorber into the screw hole to remove the seat plate.
At the same time that the cushion is fastened to the support plate, the cushion is projected from the lower surface of the support plate, so that when the upper chair is stacked on the lower chair, the cushion contacts the upper surface of the seat plate of the lower chair. There is no danger of the upper surface of the seat plate being scratched by the head of the set screw, and the thickness of the shock absorber is suppressed to the minimum necessary, so that the stacking pitch can be set small and the storage efficiency can be improved. In addition, it is installed horizontally on the leg frame
Place the seat plate on the support plate
At the recess of the mounting base formed at the
Engage the protruding part and screw the screw shaft of the set screw
Screw into the screw hole of the protrusion through the opening on the bottom of the mounting base
By fastening the seat plate to the support plate,
The tool can be protruded from the lower surface of the support plate for easy assembly.
Simply, furthermore, mounting on the protruding part of the seat plate and the support plate
Attachment of the seat plate to the support plate by engagement with the recess of the table
Positioning can be performed, and mounting state
In the lateral direction of the seat plate can be restricted.

[Brief description of the 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 the seat plate.

FIG. 3 is a sectional view of a main part in a state where a seat plate is attached to a front support plate.

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

FIG. 5 is a perspective view of a state in which the chairs of the present invention are stacked.

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 omitted side view showing the initial state of the backrest plate in a partial cross section.

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

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

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

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

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

[Explanation of symbols]

DESCRIPTION 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 Inclined rod 12 Second backrest rod 13 Lower support rod 14 Upper support rod 15 Lower support rod 16 Upper support 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 29,37 Base 30,38 Projection 31,31 39 Screw hole 40 Shock absorber 41 Screw shaft 42 Head 43 Mounting hole 44 Stopper 45 Reinforcement rib 46 Bearing recess 47 Lower reinforcement rib 48 Upper reinforcement rib 49 Notch Reference Signs List 50 outer shell 51 inner shell 52 undercut part 53 claw piece 54 rib

Claims (1)

(57) [Scope of request for utility model registration] 1. A stackable chair in which a lower surface of a seat plate and a back surface of a backrest plate are stacked in close contact with an upper surface of a seat plate of another chair and a front surface of the backrest plate positioned below.
Protruding downward at multiple locations on the support plate laterally mounted on the leg frame
The mounting base is formed with a concave opening upward.
An opening is formed in the center of the bottom surface of the
On the lower surface of the recess and at a position corresponding to the mounting base.
Forming a protruding portion to engage and facing the opening
A screw hole is formed at the center of the protrusion, and the seat plate is placed on the support plate.
In a state in which the mounting portion is placed and the protruding portion is engaged in the recess of the mounting base, a shock absorber having a mounting hole through which a screw shaft of a set screw can be inserted and the head thereof can be buried is disposed on the lower surface of the mounting base. , The shock absorber
Screw the set screw inserted into the screw hole into the screw hole to support the seat plate.
A chair capable of stacking , wherein a shock-absorbing tool is provided on a lower surface of a support plate at the same time as being fastened to the support plate.