JP2002136380A - Stacking chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the stack of stacking chairs with steel pipe legs from collapsing forward or backward. SOLUTION: An outward projection part 17 is formed at an upper front end of a front grounding body 9 fitted to a front part of a leg, and a fitting groove 20 opened inward is formed in a rear part of the grounding body 9, and a recessed part 18 opened downward and forward is formed in a lower surface of the front grounding body 9. In the condition that the chairs are stacked, the outward projection part 17 and the recessed part 18 of the front grounding bodies 9 overlapped with each other in the vertical direction are fitted to each other, and a front leg part of a chair positioned in a lower stage is fitted in the fitting groove 20 of the front grounding body 9 of a chair positioned in an upper stage. As a result, the piled chairs are held in the condition that they can not dislocate forward and backward.

Description

DETAILED DESCRIPTION OF THE INVENTION

 The present invention relates to a stacking chair.

[0001]

2. Description of the Related Art In various venues and conference rooms, stackable chairs that can be stacked are often used in order to make effective use of storage space. As one type, there is a structure in which a frame is formed of a metal pipe (steel pipe), and a seat and a backrest are attached to the frame (sometimes called a pipe chair).

[0002] In this type of stacking chair, the left and right legs are composed of a horizontal portion extending along the floor and legs rising from the front and rear of the horizontal portion. The chairs can be stacked vertically by adopting a substantially C-shaped posture as viewed from the front so as to spread.

In this chair with a pipe structure, grounding members are often provided at the front and rear of the horizontal portion of the leg. When stacking the chairs, the chairs can be stacked in a stable state by setting the grounding body of the upper chair to partially rest on the grounding body of the lower chair ( For example, Japanese Utility Model Publication No. 1-19888, Japanese Patent Application Laid-Open No. 9-215546, and
No. 7).

[0004]

Stacking chairs of this type are stacked at considerable heights, so it is necessary to prevent them from collapsing in the stacked state. However, just by stacking the grounding bodies as in the past, because the overlapping grounding bodies are slippery in the front-rear direction, when a large number of chairs are piled up and lifted,
Or, there is a problem that the stacked chairs are liable to collapse when a person carelessly touches the stacked objects or there is an earthquake.

An object of the present invention is to improve this problem.

[0006]

According to the first aspect of the present invention, the left and right legs for supporting the seat are
As a frame structure consisting of a horizontal portion extending along the floor and feet extending upward from both front and rear ends thereof, the distance between the left and right legs is widened downward, so that the lower portion between the left and right legs in the upper chair is It is possible to stack the chairs with the seats fitted, and further, at least two front and rear portions of the left and right legs are provided with a grounding body that hits the floor, and at least a front part of the front and rear grounding bodies is provided. In a chair, the grounding body is a stacking grounding body that partially overlaps when the chairs are stacked,
The stacking grounding body is provided with an engaging means (engaging portion) for preventing a vertically stacked chair from moving at least in the front-rear direction.

According to a second aspect of the present invention, in the first aspect,
An upper portion of the stacking grounding body has an outwardly projecting portion on which the stacking grounding body of the upper chair is mounted when the chairs are stacked. A concave portion is formed to fit into the outwardly extending portion of the body, and the outwardly extending portion and the concave portion constitute the engaging means.

According to a third aspect of the present invention, in the first or second aspect, an inwardly extending portion is fitted to the foot of the upper chair when the chairs are stacked, as the engaging means. Alternatively, an inward fitting groove is formed.

[0009] By the way, the stacking chair is generally provided with a backrest, and when stacking the chairs vertically, the backrests of the upper and lower chairs can be overlapped. In this case, since the positioning of the back of the chair is performed by overlapping the backrests, only the grounding body at the front of the leg may be used as the stacking grounding body.

When the backrests of the stacked chairs are overlapped, the upper chair does not move backward with respect to the lower chair, so that the upper chair is connected to the lower chair as an engaging means. On the other hand, it suffices to prevent shifting toward the front side. Therefore, in the case of a chair provided with a backrest, it is sufficient that the engagement means can at least prevent the upper chair from moving toward the lower chair with respect to the lower chair.

[0011] It is also possible to add other functions to the grounding body, such as a function of connecting the chair to the left and right.

[0012]

According to the present invention, the chairs can be stacked in multiple stages in a stable posture by using the grounding member, and the chairs stacked vertically can be prevented from moving in the front-rear direction. Collapse of the stacked chairs can be prevented or significantly suppressed, and safety can be improved.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings.

(1) First Embodiment (FIGS. 1 to 11) FIGS. 1 to 11 show a first embodiment. 1 is an overall schematic perspective view, FIG. 2 is an exploded perspective view, FIG. 3A is a plan view, and FIG. 3B is a right side view. First, the outline will be described based on these figures. I do.

[0015] The chair comprises a seat frame 1 made of a steel pipe and having a substantially quadrangular shape in a plan view, a pair of left and right leg frames 2 supporting left and right sides of the seat frame 1, and a left and right leg frame 2 connected at an upper portion thereof. A reinforcing frame 3, a set of two back columns 4 erected at the left and right rear portions of the seat frame 1,
A seat 5 and a backrest 6 with a cushion 7 are provided.

The left and right horizontal portions 1c, the leg frames 2, and the back struts 4 of the seat frame 1 extend in series, and are connected to the front and rear horizontal portions 1a and 1b of the seat frame 1 and the reinforcing frame 3.
And connected.

On the left and right sides of the backrest 6, there is integrally formed a downwardly directed cylindrical portion 6a which fits into the backing column 4, and the downwardly directed cylindrical portion 6a is fixed to the backing column 4 with screws (not shown). .

The leg frame 2 includes a horizontal portion 2a extending along the floor, a forefoot portion 2b rising from a front portion thereof, and a rear foot portion 2c rising from a rear portion of the horizontal portion 2a, and has a substantially trapezoidal shape in a side view. Is formed.

The left and right legs 2 are in a C-shape when viewed from the front so that the space between them spreads downward. Therefore, as shown in FIG. 3B, a large number of chairs are stacked. Can be. In the chair according to the present embodiment, the downwardly-facing tubular portion 6a of the backrest 6 is set so as to overlap with the back and forth in the stacked state.

The horizontal part 2a and the forefoot part 2 of the left and right legs 2
The front grounding member 9 is attached to the connecting portion with the b, and the rear grounding member 10 is mounted at the rear of the horizontal portion 2a. Further, a pair of front and rear connectors 11 are attached to the right horizontal portion 2a (or the left horizontal portion) in a state of being in close contact with the rear surface of the front grounding member 9 and the front surface of the rear grounding member 10.

Reference numeral 12 in FIG. 2 is a seat bracket for mounting the seat body 5, and reference numeral 13 is a cover for covering the seat bracket 12 from below.

Next, the grounding members 9 and 10 and the connector 11 will be described with reference to FIGS.

FIG. 4 is a plan sectional view of the leg 2, and FIG.
6 is a sectional view taken along line VI-VI of FIG. 4, and FIG.
8 is a sectional view taken along line VII-VII, FIG. 8 is a sectional view taken along line VIII-VIII of FIG.
9 is a sectional view taken along line IX-IX of FIG. 4, FIG. 10 is a view showing a stacked state, (A) is a front view, (B) is a right side view, and FIG.
FIG. 3 is a plan sectional view showing a connected state.

[0024] Front grounding body 9 The front grounding body 9 is formed in an L shape in a side view so as to overlap the horizontal portion 2a and the forefoot portion 2b, and the horizontal portion 2a
A semicircular groove 14 into which the forefoot portion 2b fits is formed over the entire length.

As shown in FIG. 5, since the forefoot 2b of the leg 2 is inclined in front view, the front of the foreground contact body 9 is also inclined. It is fixed to the forefoot part 2b by a screw 16 extending in the horizontal direction. Further, as shown in FIG. 7, the leg 2 is also fixed to the horizontal portion 2 a of the leg 2 with a screw 16.

As shown in FIGS. 5 and 6, for example, an outwardly projecting portion 17 is provided at the upper end of the front portion of the front grounding member 9 as a part of the engaging means. Further, for example, as shown in FIG. 6, a recess 18 which is opened forward and downward is formed on the lower surface of the front grounding member 9.

As shown in FIG. 3B, when the chairs are stacked with the downwardly-facing tubular portions 6 of the backrest 6 stacked on each other,
As shown in FIG. 11, the recess 18 of the upper front grounding member 9 at the upper stage is set so as to be mounted on the outwardly projecting portion 17 of the lower front grounding member 9 in a state in which it cannot be shifted forward. Therefore, the upper and lower chairs are held so as not to be displaced back and forth.

Also, as shown in FIG. 4, for example, an inwardly protruding portion 9a is provided at the lower end portion of the front grounding member 9 as an example of an engagement means, as can be understood from FIGS. Also, the upper and lower chairs are held in such a manner that the upper and lower chairs cannot be displaced back and forth even when the inwardly protruding portion 9a of the front grounding member 9 of the chair located at the lower stage hits the forefoot portion 2b of the leg 3 at the upper stage. Is done.

[0029] Rear grounding body 10 and connector 11 for example, FIG.
As shown in the figure, the rear ground contact body 10 has a groove shape with an upward opening so that the horizontal portion 2a of the leg 2 is fitted therein, and is fixed to the horizontal portion 2a with a screw 16 inserted from below.

The connecting member 11 includes a horizontal portion 2 a of the leg 2.
Is fixed to the lower horizontal portion 2a with screws 16 inserted from below. Further, the connecting member 11 is integrally provided with a connecting portion 11b having an upward opening into which the lower horizontal portion 2a of the leg 2 of the chair arranged next to the fitting is fitted from above.

The attachment position of the connecting tool 11 can be set arbitrarily. However, as in the present embodiment, the connecting tool 11 is attached to the front grounding body 9.
When it is disposed so as to be in close contact with the rear surface and the front surface of the rear grounding body 10, as is apparent from the imaginary line 19 shown in FIG.
Since the connecting members 11 of the chair located on the left side are sandwiched from the front and rear by the front and rear grounding bodies 9 and 10 of the chair located on the right side, there is an advantage that the left and right chairs are held so as not to be able to shift back and forth.

(2) Second Embodiment (FIGS. 12 to 15) FIGS. 12 to 15 show a second embodiment.

This embodiment is another example of the front grounding member 9. FIG. 12 is a perspective view seen from above and below, FIG. 13 (A) is a plan view, FIG. 13 (B) is a bottom view, and FIG. Is a front view,
FIG. 15 is a side view. FIG. 13 is a view of the forefoot portion 2b as viewed from the axial direction.

This embodiment is basically the same as the first embodiment. The main difference from the first embodiment is that the inwardly projecting portions 9a are formed in front and rear, and the front and rear inwardly projecting portions 9a are formed. The point is that a fitting groove 20 is formed between the forefoot portions 2b of the chair located at the lower tier when the chairs are stacked.

In the drawing, what is attached to the left leg 2 (the leg located on the left side in front view of the chair) is shown, and what is attached to the right leg is symmetrical.

In the second embodiment, when the chairs are vertically stacked, the fitting groove 20 of the front grounding member 9 in the upper chair and the forefoot 2b of the lower chair are arranged.
Are fitted so that they cannot be shifted back and forth, so that the function of preventing the chair from shifting can be further improved.

The front grounding body 9 of the first embodiment has a vertical groove formed on the front surface. However, in the second embodiment, the front grounding body 9 has only a screw insertion hole on the front surface. As a smooth surface. For this reason, it has a neat design.

(3) Advantages of the Embodiment By the way, in order to enhance the sitting comfort of the chair, it is preferable to increase the thickness of the seat body 5 to enhance the cushioning performance. In addition, in order to prevent the upper surface of the seat body from being damaged, it is preferable to leave a gap between the upper and lower chair seats during stacking.

[0039] Then, since the stacking interval of the upper and lower chairs becomes larger, in the conventional configuration in which the grounding members are provided only on the horizontal portions of the legs and they are stacked, the grounding members protrude greatly upward from the horizontal frame 2a. Therefore, the appearance becomes worse.

On the other hand, as in both embodiments, the front grounding member 9 is formed in a substantially L-shape in a side view so as to also overlap the forefoot portion 2b of the leg 2, so that the front grounding member 9 is out of the front state. When the overhang portion 17 is formed, the front grounding member 9 does not protrude greatly from the surface of the leg 2 even if the height thereof is increased, so that the vertical spacing of the chair is increased without deteriorating the appearance. There is an advantage that can be stacked.

When the front grounding member 9 is formed in an L-shape when viewed from the side and fixed to the forefoot portion 2b and the horizontal portion 2a of the leg 2 with screws 16, the mounting strength of the front grounding member 9 can be improved. .

It is needless to say that the formation of the front grounding member 9 in this way is an independent invention regardless of the presence or absence of the engagement means.

(4) Others The present invention is not limited to the above embodiment, but can be embodied in various ways. For example, the recess formed on the lower surface of the front grounding member is formed so as to open downward, and the outwardly projecting portion of the front grounding member and the recess overlapping vertically are fitted so that they cannot be displaced back and forth. Is also good.

Further, the stacking grounding body may be configured such that a part grounded on the floor and a part provided with the engagement means are separately formed, and these are separately attached to the legs. Further, the front and rear grounding bodies can be continuously formed integrally.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair according to a first embodiment.

FIG. 2 is an exploded perspective view of a chair.

3A is a plan view, and FIG. 3B is a right side view.

FIG. 4 is a plan sectional view of a leg.

FIG. 5 is a front view taken along the line VV in FIG. 4;

FIG. 6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional view taken along line VII-VII of FIG.

FIG. 8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a sectional view taken along line IX-IX of FIG.

FIG. 10 is a view of a stacked state, in which (A) is a front view and (B) is a right side view.

FIG. 11 is a plan sectional view showing a connected state.

FIG. 12 is a perspective view of the second embodiment.

FIG. 13 is a view showing a second embodiment, wherein (A) is a plan view and (B)
Is a bottom view.

FIG. 14 is a front view of the second embodiment.

FIG. 15 is a side view of the second embodiment.

FIG. 16 is a perspective view of a use state of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat frame 2 Leg 2a Horizontal part 2b Forefoot part 5 Seat 9 Front grounding body 9a Inward overhanging part as an example of engaging means 10 Rear grounding body 11 Connector 17 Outward overhanging part constituting engaging means 18 recess forming the engaging means 20 fitting groove as an example of the engaging means

Claims (3)

[Claims] 1. The left and right legs for supporting a seat body are formed as a frame structure comprising a horizontal portion extending along the floor and legs extending upward from both front and rear ends thereof, and the distance between the left and right legs is lowered. By spreading, it is possible to stack the chairs in the lower tier with the seats of the lower tiers being fitted between the left and right legs in the upper tiers, and furthermore, at least two front and rear portions of the left and right legs are in contact with the floor. A chair, wherein at least the front grounding body of the front and rear grounding bodies is a stacking grounding body that partially overlaps when the chairs are stacked, wherein the stacking grounding body is vertically A stacking chair comprising an engaging means for preventing the overlapping chairs from moving at least in the front-rear direction. 2. An upper portion of the stacking grounding body is provided with an outwardly projecting portion on which a stacking grounding body of an upper chair is mounted when the chairs are stacked. 2. The chair according to claim 1, wherein a recess is formed to fit into the outwardly extending portion of the stacking grounding body of the chair, and the outwardly extending portion and the recess form the engaging means. 3. Stacking chair. 3. An inwardly projecting portion or an inwardly fitting groove which is fitted to a foot portion of an upper chair when stacking chairs is formed as said engaging means in said stacking grounding body. A stacking chair according to claim 1 or claim 2.