JP2002142904A - Folding chair - Google Patents

Abstract

(57) [Summary] [Problem] To provide a folding chair that can prevent displacement and collapse when stacked in a folded state with a simple configuration. The vehicle includes at least a front and rear leg frame (2, 3) and a seat (4).
When the plurality of chairs 1 </ b> A, 1 </ b> B... Are stacked in the folded state Q in a folded state Q configured to be able to assume a folded state Q in which the Between the adjacent chairs 1A and 1B by engaging the protruding portion 71 protruding from the seat 4 on the chair 1A side with the rear leg frame 3 on the other chair 1B side facing the seat 4 Relative movement is prohibited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a folding chair suitably used in an office or the like.

[0002]

2. Description of the Related Art As a folding chair of this kind, conventionally,
The front and rear leg frame and the seat are provided, and the front leg frame and the rear leg frame can be folded from a use state to a folded state in which the front leg frame and the rear leg frame are substantially flush with each other by the relative rotation of the front leg frame, the rear leg frame, and the seat. There are things that are. Specifically, the front and rear leg frames are formed by molding a metal round pipe into a substantially U-shape.

[0003]

When the folding chair having such a structure is not used, it can be folded and stacked substantially in a plane, so that it requires less storage space than other chairs that cannot be folded. Despite the advantages, the front leg frame and the rear leg frame, which are metal round pipes, are slippery even if they are in contact with each other when stacked, and there is a risk of dislocation and collapse if many are stacked .

An object of the present invention is to solve such a problem.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention comprises at least a leg frame and a seat, and a use state in which the seat is in a substantially horizontal state; In a folding chair configured to be able to take a folded state in which the seat and the seat are folded so as to be substantially planar, when stacking a plurality of chairs in the folded state, a seat on one of the adjacent chairs, The relative movement that occurs between adjacent chairs is prohibited by engaging the seat and the leg frame on the other chair side facing the seat.

With such a configuration, when a plurality of chairs are stacked in a folded state, the seat on one chair side and the leg frame on the other chair side are engaged with each other, and the chairs adjacent to each other are connected to each other. By prohibiting relative movement, even if a large number of chairs are stacked, it is possible to effectively prevent displacement and collapse of the stacked state. In particular, since the prevention of the relative movement occurring between the adjacent chairs is realized by the engagement of the seat and the leg frame, if a projection is provided on the seat side where it is relatively easy to have a degree of freedom in shape, etc. The above function can be realized with little processing or the like on the leg frame side where the shape is relatively difficult to change.

[0007] As a specific embodiment, when a plurality of chairs are stacked in a folded state, a seat on one adjacent chair side and a leg frame on the other chair side facing the seat are arranged. There is a mechanism provided with a movement prohibition mechanism that prohibits relative movement in at least one of the width direction and the depth direction that occurs between adjacent chairs in relation to each other.

[0008] In order to prohibit relative movement occurring between adjacent chairs only by making a simple shape change on the seat side, a movement prohibiting mechanism is used when stacking a plurality of chairs in a folded state. A protruding portion protruding from the seat on one chair side toward the leg frame on the other chair side, and the other prohibiting relative movement in at least one of the width direction and the depth direction in relation to the protruding portion. And a leg frame on the chair side.

In a preferred embodiment in this case, when a plurality of chairs are stacked in a folded state, the relative movement in the width direction generated between adjacent chairs substantially abutting on the leg frame. That has a first movement prohibition surface for prohibiting the movement.

In order to enable the relative movement between the adjacent chairs to be properly prohibited without causing rattling or the like, the first movement prohibition surface should have a shape substantially along the outer peripheral shape of the leg frame. It is desirable to have one.

[0011] In order to prohibit relative movement of the adjacent chairs in the depth direction, the leg frame is provided with a protruding portion provided in the thickness direction thereof, and the protruding portion is
When stacking a plurality of chairs in a folded state, the chair may include a second movement prohibition surface that substantially abuts the protrusion on the other chair side and prohibits relative movement of the leg frame in the depth direction. desirable.

In a preferred embodiment in this case, the protrusion is a tubular member provided outside the leg frame main body.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the folding chair 1 of the present embodiment includes a front leg frame 2 for supporting a rear end portion of a seat 4 so as to be rotatable in forward and reverse directions via a first axis p. A rear leg frame 3 rotatably mounted inside the front leg frame 2 via a third axis r and supporting the front end side of the seat 4 rotatably in the forward and reverse directions via a second axis q. That is, the front leg frame 2 and the rear leg frame 3
The seat 4 is connected to the seat 4 via a first axis p, a second axis q, and a third axis r so as to be rotatable in the forward and reverse directions, respectively. From the above, the front leg frame 2 and the rear leg frame 3 can be folded substantially flatly at a position where the inner side surface of the front leg frame 2 and the outer side surface of the rear leg frame 3 face each other. The configuration is as follows. In addition, this folding chair 1
In the folded state Q, as shown in FIG. 3, together with another folding chair 1 of the same shape, the folding chair 1 can be stacked vertically with the front side down.

The front leg frame 2 is formed by bending a round pipe member made of steel into a substantially U-shape, and has a backrest 6 at an upper end portion. Specifically, the front leg frame 2 includes a base rod 21 that is positioned substantially parallel to the floor surface F in the use state P, and a left and right upright portion 22 that stands up at a predetermined angle with respect to the floor surface F. Be composed. Further, the base rod 21 is provided with a slide prevention member 23 for preventing slide with the floor F.

The rear leg frame 3 is formed by bending a steel round pipe member into a substantially U-shape similarly to the front leg frame 2 so that the rear leg frame 3 has an X-shape inside the front leg frame 2 when viewed from the side. Are connected so as to be rotatable relative to the front leg frame 2 via a third axis r. The rear leg frame 3 includes a base rod 31 positioned substantially parallel to the floor surface F in the use state P, and a left and right upright portion 32 which is a leg frame main body that stands up at a predetermined angle with respect to the floor surface F. It is provided. Further, the base rod 31 is provided with a slide prevention member 33 for preventing the slide with the floor F. In the present embodiment, the rear leg frame 3 includes a substantially cylindrical slide portion 34 attached to the outside of the left and right upright portions 32 so as to be slidable along the right and left upright portions 32. I have. The slide portion 34 includes the third axis r that rotatably supports the rear leg frame 3 with respect to the front leg frame 2,
The rear leg frame 3 and the seat 4 that are generated when the seat 4 and the front and rear leg frames 2 and 3 are rotated between the use state P and the folded state Q by being slidably attached to the outside of the left and right standing portions 32. Center of rotation and front leg frame 2
The displacement of the separation distance between the rear leg frame 3 and the rotation center of the rear leg frame 3 is absorbed.

As shown in FIG. 1, the seat 4 is provided with a seat frame 7 having a substantially rectangular shape in plan view having an opening at the center, and attached to the seat frame 7 while being stretched in the opening. A net-like upholstery 8 is provided, and the cushioning property is secured by utilizing the tension of the upholstery 8. The seat frame 7
Is made of injection-molded synthetic resin.

In this embodiment, as shown in FIGS. 4 to 7, when a plurality of chairs 1A, 1B,... And a rear leg frame 3 as a leg frame on the other chair 1B side facing the seat 4
The relative movement that occurs between the adjacent chairs 1A and 1B is prohibited by relating them. Specifically, a seat 4 on the side of one adjacent chair 1A and this seat 4
Prohibition mechanism 9 that interlocks with the rear leg frame 3 of the other chair 1B at the position facing the other and prohibits relative movement in the width direction and the depth direction generated between the adjacent chairs 1A and 1B. Is provided. 4 and 5
Is a diagram showing only the seat 4 of one chair 1A and the rear leg frame 3 of the other chair 1B.

When a plurality of chairs 1A, 1B,... Are stacked in the folded state Q, the movement prohibiting mechanism 9 projects from the seat frame 7 of the seat 4 of the adjacent one chair 1A toward the other chair 1B. And the rear leg frame 3 on the other chair 1B side, which is prohibited from relative movement in the width direction and the depth direction in association with the projection 71. In the present embodiment, relative movement in the width direction is prohibited by abutting the protruding portion 71 and the left and right upright portions 32 of the rear leg frame 3, and the protrusion 71 and the left and right upright portions 32 are moved in the thickness direction. The relative movement in the depth direction is prohibited by abutting the slide portion 34 which is a protrusion provided to protrude from the main body.

The protruding portion 71 protrudes upward from the rear end portion 7a of the seat 4 which is the non-use end of the seat receiving portion 7, and extends along the width direction of the seat 4. The protruding portion 71 is provided at the center in the width direction of the seat 4 in a state where the left and right end portions of the seat 4 have an area where the left and right standing portions 32 of the rear leg frame 3 can intervene. And
The protruding portion 71 abuts the left and right side surfaces 71a extending along the depth direction of the seat 4 with the left and right upright portions 32 of the rear leg frame 3 on the other chair 1B side, and the relative width of the adjacent chairs 1 in the left and right width direction. A second movement prohibition surface 91 for prohibiting movement and a second surface for prohibiting relative movement in the depth direction by abutting a rear surface 71b extending along the width direction with the slide portion 34 of the other rear leg frame 3. The movement inhibition surface 92 is provided.

As shown in FIGS. 4 and 6, the first movement prohibiting surface 91 has a partially arcuate shape substantially along the outer peripheral shape of the rear leg frame 3, and includes a plurality of chairs in the folded state Q. When 1A, 1B ... are stacked, the other chair 1B
The left and right standing portions 32 of the rear leg frame 3 on the side abut against the first movement prohibiting surfaces 91 located on the left and right of the protruding portion 71, so that movement in the width direction is prohibited. In the present embodiment, since the protruding portion 71 is located between the left and right upright portions 32, the left and right side surfaces 71a of the protruding portion 71 and the left and right upright portions 3 are provided.
The movement in both the left and right directions is prohibited by abutment with 2. On the other hand, as shown in FIGS. 5 and 7,
When the upper surface 34a of the slide portion 34 abuts on the second movement prohibition surface 92, the movement in the depth direction indicated by the arrow in FIG. 5 is prohibited. In the present embodiment, since the movement prohibition mechanism 9 can prohibit only movement in the depth direction indicated by the arrow in FIG. 5, the backrests 6 of the chairs 1A and 1B adjacent to each other during stacking and the anti-slip member are stacked. The relative movement in the direction opposite to the arrow is also prohibited by interlocking the members 23 with each other.

With such a configuration, when a plurality of chairs 1 are stacked in the folded state Q, the seat 4 on one chair 1A and the rear leg frame 3 on the other chair 1B are engaged. Therefore, the relative movement between the adjacent chairs 1A, 1B is prohibited, and even if a large number of chairs 1A, 1B are stacked, it is possible to effectively prevent the displacement and the collapse of the stacked state. Becomes possible. In particular, since the relative movement between the adjacent chairs 1A and 1B is prevented by the engagement between the seat 4 and the rear leg frame 3, the shape is relatively reduced by injection molding as in the present embodiment. By providing the projection 71 on the side of the seat 4 where the degree of freedom is easily provided, the above-mentioned function can be realized with almost no processing on the side of the leg frame 3 where the shape is relatively difficult to change. Becomes In the present embodiment, since the seat 4 is constituted by the synthetic resin seat frame 7 and the net-shaped upholstery 8, the movement is inhibited by the seat frame 7 which is relatively easily changed in shape. A part of the components of the mechanism 9 can be provided to prevent movement between the adjacent chairs 1A and 1B, and the net-like upholstery 8 can ensure the cushioning of the seat 4. The protrusions 71 not only prevent relative movement during stacking, but also contribute to increasing the rigidity by making the seat 4 thick. Although not shown, a metal seat receiving portion is provided below the seat frame portion 7 in a rectangular shape in plan view, and at a position corresponding to the projecting portion 71 on the rear end side of the seat receiving portion. The rear wall provided is also the protrusion 71
This also contributes to increasing the rigidity of the seat 4. Although not shown, the rear wall body includes left and right end portions having a surface portion substantially along the width direction of the seat, and a central portion having a surface portion substantially along the thickness direction of the seat. The surface portions forming the left and right end portions of the thin plate member and the surface portion forming the central portion are formed by twisting the surface portions relatively so as to be substantially orthogonal to each other, and the central portion is housed in the protruding portion 71. ing.

When a plurality of chairs 1A, 1B,... Are stacked in the folded state Q, the movement prohibiting mechanism 9 projects from the seat 4 on one of the adjacent chairs 1A toward the rear leg frame 3 on the other chair 1B. Protrusion 71, and the protrusion 71
And the rear leg frame 3 on the other chair 1B side, which is prohibited from relative movement in the width direction and the depth direction, is provided with a simple process of providing the protrusion 71 on the seat 4 side. It is possible to prohibit the relative movement occurring between the adjacent chairs 1A and 1B by using only the above.

When the plurality of chairs 1A, 1B,... Are stacked in the folded state Q, the chairs 1A, which substantially abut the left and right upright portions 32 of the front leg frame 3, are adjacent to each other.
1st to prohibit relative movement in the width direction that occurs between 1B
, And without using a complicated process such as providing an engagement concave portion, using the left and right side surfaces 71a of the protruding portion 71 in the width direction generated between the chairs 1A and 1B. Can be effectively prohibited.
Particularly, in the present embodiment, a protruding portion 71 is provided between the left and right upright portions 32, and the left and right side surfaces 71 a thereof are connected to the first movement prohibiting surface 9
Since it is set to 1, it is possible to effectively prevent relative movement in both the left and right directions.

Since the first movement-prohibiting surface 91 has a shape substantially along the outer peripheral shape of the left and right upright portions 32 of the rear leg frame 3, the chair which is properly adjacent to the chair without rattling or the like. It is possible to prohibit relative movement between 1A and 1B.

The rear leg frame 3 has a cylindrical slide portion 34 attached to the outside of the left and right upright portions 32 so as to protrude in the thickness direction thereof, and the protruding portion 71 is in the folded state Q When the plurality of chairs 1A, 1B,... Are stacked, the second movement prohibition surface 92 prohibits relative movement in the depth direction between the chairs 1 adjacent to the slide portion 34 on the other chair 1B side in a position substantially abutting. ., It is possible to prohibit the relative movement of the adjacent chairs 1A, 1B,... In the depth direction. In particular, in the present embodiment, the rotation center of the rear leg frame 3 and the seat 4, the rotation center of the front leg frame 2, and the rear of the rear leg frame 3 and the seat 4 that occur when the seat 4 and the front and rear leg frames 2 and 3 are rotated between the use state P and the folded state Q Since the slide portion 34 provided slidably on the left and right upright portions 32 of the rear leg frame 3 is used to absorb the displacement of the separation distance from the rotation center of the leg frame 3, the number of parts can be reduced. Is possible.

It should be noted that the configuration of the present invention is not limited to those described above, and other configurations can be variously modified without departing from the spirit of the present invention.

[0028]

The present invention is embodied in the above-described configuration and has the following effects.

That is, according to the present invention, when a plurality of chairs are stacked in a folded state, a seat on one adjacent chair and a leg frame on the other chair located at a position facing the seat are engaged. , The relative movement occurring between adjacent chairs is prohibited, so that even if a large number of chairs are stacked, it is possible to effectively prevent the occurrence of positional deviation and the collapse of the stacked state. . In particular, since the prevention of relative movement occurring between the adjacent chairs is realized by the engagement between the seat and the leg frame, if a projection is provided on the seat side where it is relatively easy to have a degree of freedom in shape, etc. In addition, it is possible to effectively prevent the leg frames, which are relatively difficult to change in shape, from being displaced with little processing or the like, and to effectively prevent the stacked state from collapsing.

When a plurality of chairs are stacked in a folded state, adjacent chairs are engaged with each other between a seat on one adjacent chair side and a leg frame on the other chair side facing the seat. If a movement prohibition mechanism is provided that prohibits relative movement in at least one of the width direction and the depth direction that occurs between them, even if a large number of chairs are stacked by this movement prohibition mechanism, a position shift occurs, It is possible to effectively prevent the stacked state from collapsing.

When a plurality of chairs are stacked in a folded state, the movement prohibiting mechanism may engage with a protrusion protruding from a seat on an adjacent one of the chairs to a leg frame on the other chair, and engage with the protrusion. And the leg frame on the other chair side, which is prohibited from moving relative to at least one of the width direction and the depth direction, a projection is provided on the seat side, which has a relatively high degree of freedom in shape. If provided, it is possible to prohibit the relative movement that occurs between adjacent chairs with little processing or the like on the leg frame side where the shape is hardly changed.

When the plurality of chairs are stacked in a folded state, the protrusion has a first movement prohibiting surface for prohibiting relative movement in the width direction generated between adjacent chairs substantially abutting on the leg frame. If it does, it is possible to effectively prohibit relative movement in the width direction between chairs using the upright surface of the projection without performing complicated processing such as providing an engaging recess. It is.

If the first movement prohibition surface has a shape substantially conforming to the outer peripheral shape of the leg frame, it is necessary to prohibit relative movement between adjacent chairs properly without rattling or the like. Becomes possible.

The leg frame has a projection provided so as to protrude in the thickness direction thereof, and when the plurality of chairs are stacked in a folded state, the projection is substantially the same as the projection on the other chair side. If a second movement prohibition surface is provided to protrude and prohibit relative movement of the leg frame in the depth direction, it is possible to prohibit relative movement of adjacent chairs in the depth direction.

If the convex portion is a cylindrical member provided outside the leg frame main body, the relative movement of the adjacent chairs in the depth direction can be achieved by a simple structure of attaching the cylindrical member to the leg frame main body. It is possible to prohibit.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing a use state and a folded state of the chair.

FIG. 3 is a side view showing a state where a plurality of chairs are stacked in the folded state.

FIG. 4 is a perspective view showing a state where a plurality of chairs are stacked in the folded state.

FIG. 5 is a plan view showing a main part in a state where a plurality of chairs are stacked in the folded state.

FIG. 6 is a sectional view taken along the line II in FIG. 5;

FIG. 7 is a sectional view taken along line II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Folding chair 2 ... 1st leg frame (front leg frame) 3 ... 2nd leg frame (rear leg frame) 32 ... leg frame main body (right and left standing part) 34 ... convex part (slide part) 4 ... seat 71 ... Projection 9: Movement prohibition mechanism 91: First movement prohibition surface 92: Second movement prohibition surface P: Usage state Q: Folded state

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoko Iida 6-1-1, Oimazato-Minami, Higashi-Nari-ku, Osaka-shi Inside KOKUYO Co., Ltd. Inside Furniture Development Dept. (72) Inventor Tohru Aoyagi 5331 Nishiharu Kinoshita Kawahara Ina-shi, Nagano Prefecture Takano Co., Ltd. Inside Furniture Development Dept.

Claims (7)

[Claims] 1. A use state in which at least a leg frame and a seat are provided, wherein the seat is in a substantially horizontal state, and a folded state in which the leg frame and the seat are folded so as to be substantially planar. When stacking a plurality of chairs in a folded state, a seat on one adjacent chair and a leg frame on the other chair at a position facing the seat are related to each other. A folding chair for preventing relative movement between adjacent chairs. 2. In a case where a plurality of chairs are stacked in a folded state, adjacent chairs engage with each other between a seat on one adjacent chair side and a leg frame on the other chair side facing the seat. The folding chair according to claim 1, further comprising a movement prohibition mechanism for prohibiting relative movement in at least one of a width direction and a depth direction generated between the chairs. 3. When the movement prohibition mechanism stacks a plurality of chairs in a folded state, a protrusion protruding from an adjacent seat on one chair side toward a leg frame on the other chair side; 3. The folding chair according to claim 2, wherein the folding chair is constituted by a leg frame on the other chair side, which is prohibited from being relatively moved in at least one of the width direction and the depth direction. 4. A first movement prohibition surface for prohibiting relative movement in the width direction generated between adjacent chairs substantially abutting on the leg frame when a plurality of chairs are stacked in a folded state. 4. The folding chair according to claim 3, comprising: 5. The folding chair according to claim 4, wherein the first movement prohibition surface has a shape substantially conforming to an outer peripheral shape of the leg frame. 6. A leg frame comprising a projection provided so as to protrude in a thickness direction thereof, wherein said projection is formed by stacking a plurality of chairs in a folded state. 6. The folding chair according to claim 3, further comprising a second movement-prohibiting surface for substantially abutting the leg frame to prohibit relative movement of the leg frame in the depth direction. 7. The folding chair according to claim 6, wherein the projection is a tubular member provided outside the leg frame main body.