JP5915241B2 - Chair - Google Patents

Description

  The present invention relates to a foldable chair used in a conference hall or the like.

  Conventionally, as a foldable chair used in a conference hall or the like, a seat, a front leg frame that rotatably supports the front end side of the seat, and a rotatably connected to the front leg frame and the seat A rear leg frame that rotatably supports the rear end side, and the front leg frame and the rear leg frame are substantially flush with each other from the state of use by relative rotation of the front leg frame, the rear leg frame, and the seat. It is comprised so that it can fold in a folding state (for example, refer patent document 1).

  In this type of chair, a front leg frame and a rear leg that are substantially flush with each other so that the seat and back plate are compact when storing a plurality of folding chairs having the same structure in the folded state in a vertical or horizontal direction. It is conceivable that the thickness falls within the range of the frame thickness.

  However, particularly in the case of such a configuration in the back plate, when the user falls into the back plate in the use state, the shape of the back plate is not always arranged along the upper body of the user, and is comfortable. Problems such as not being able to get comfortable sitting can occur.

Japanese Patent Laid-Open No. 2002-177088

  This invention pays attention to the above points, and has as its object to provide a chair that can achieve both a compact folded state and a comfortable sitting state.

  In order to achieve such an object, the present invention takes the following measures.

  That is, the chair according to the present invention is a seat, a first leg frame that rotatably supports one end of the seat in a forward / reverse direction, and a forward / reverse direction with respect to the first leg frame. And a second leg frame that supports the other end of the seat so as to be rotatable in the forward and reverse directions, and the first leg frame, the second leg frame, and the seat relative to each other. The chair is configured to be folded from a use state into a folded state in which the first and second leg frames are substantially flush with each other, and a back plate is provided between the first leg frames. It has a back plate that is positioned so that the thickness is within the range of the thickness of the first leg frame, and the back plate is difficult to deform in the thickness direction and can retain the shape of the back plate itself. Area and a deformation area that easily deforms in the thickness direction. And wherein the Rukoto.

  If this is the case, the back plate positioned within the thickness range of the first leg frame can be appropriately deformed according to the load on the user's condition, thus providing a comfortable sitting comfort for the user. Can do. Of course, since the back plate is positioned within the thickness range of the first leg frame, it can contribute to a compact folded state. That is, a chair that can achieve both a compact folded state and a comfortable use state is realized.

  In order to make the back plate more easily deformable along the upper body of the user, it is desirable that at least a part of the deformation region can be deformed outward beyond the thickness of the first leg frame.

  As a structure for ensuring a favorable sitting comfort while the back plate reliably supports the upper body of the seated person and deforms along the upper body, the material constituting the shape retaining area and the material constituting the deformation area are different. Can be cited.

  On the other hand, in order to form the deformation region with a simple configuration, it is preferable that the back plate is formed integrally and the deformation region has a deformation promoting portion that can promote deformation.

To support the seated person upper body more suitably, Ru positioned Tei deformation area on the lower side of the back plate with locating the shape-retaining region on the upper side of the back plate. And a structure in which deformation area may be deformed along the body more user width deformation region, it is configured to be larger toward the lower side.

  As a configuration that ensures the user's comfort and facilitates handling in the folded state, a handle is provided above the back plate and the back plate has a substantially flat plate shape. There can be mentioned a configuration in which the back plate is positioned so that a virtual straight line extending further upward from the lower end of the plate passes further forward than the front surface of the handle. Thereby, it can avoid effectively that a handle interferes with the user's upper body seated in the use condition.

  ADVANTAGE OF THE INVENTION According to this invention, the chair which can make compatible both a compact folding state and the comfortable use state can be provided.

The external view of the chair which concerns on one Embodiment of this invention. The side view which concerns on the same embodiment. The other side view. Action explanatory drawing which concerns on FIG. The external view which shows the principal part which concerns on the same embodiment. FIG. 5 is a central sectional view according to FIG. 4. FIG. 6 is an operation explanatory diagram according to FIG. 5. Other operation explanatory views concerning this embodiment. Structure explanatory drawing concerning the modification of the embodiment. Same as above. Same as above.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the chair 1 according to this embodiment includes a front leg frame 2 that is a first leg frame that supports both front sides of a seat 4 so as to be rotatable in a forward and reverse direction via an axis, and a front leg frame 2. And a rear leg frame 3 as a second leg frame that is rotatably attached to the outside via a rotary support 32 and supports both sides of the back of the seat 4 so as to be rotatable in the forward and reverse directions via a shaft. In other words, the front leg frame 2, the rear leg frame 3, and the seat 4 are connected so as to be rotatable in forward and reverse directions. From the use state (P) shown in FIGS. 2 and the rear leg frame 3 are configured to be folded into a folded state (Q) shown in FIG. 3 where the front leg frame 2 and the rear leg frame 3 are substantially flush with each other at a position where the side legs and the rear leg frame 3 overlap each other. The chair 1 according to the present embodiment is positioned within the thickness range of the front leg frame 2 and the rear leg frame with the seat 4 and the back plate 5 folded (Q). Therefore, as shown in FIG. 3, in the folded state (Q), the chair 1 may be in a state where a plurality of folding chairs 1 having the same shape are stacked and leaned against a wall or the like with the rear leg frame down. Any one of the chairs 1 that overlap in the thickness direction can be extracted from the side.

  Here, the chair 1 according to the present embodiment is capable of rotating in a forward / reverse direction with respect to the seat 4, a front leg frame 2 that rotatably supports one end of the seat 4 in the forward / reverse direction, and the front leg frame 2. And a rear leg frame 3 that is connected and supports the other end of the seat 4 so as to be rotatable in forward and reverse directions, and is used by relative rotation of the front leg frame 2, the rear leg frame 3, and the seat 4. (P) is a chair 1 configured to be folded in a folded state (Q) in which both leg frames 2 and 3 are substantially flush with each other, and a back plate 5 is provided between the front leg frames 2 and the back plate. 5 is positioned so as to be within the range of the thickness of the front leg frame 2, and the back plate 5 is not easily deformed in the thickness direction, and the deformed region 52 is easily deformed in the thickness direction. It is characterized by having.

  Hereinafter, the structure of each part of the chair 1 will be described.

  The front leg frame 2 includes a frame main body 21 made of a steel round pipe and having a substantially U shape, and an upper frame made of, for example, a resin attached to be inserted into the pipe of the frame main body 21 from above the frame main body 21. 22 and a handle 23 formed at the upper end of the upper frame 22. The back frame 5 is provided on the upper frame 22 through a slightly spaced distance from the handle 23. A gripping region S having an opening shape is formed between the back plate 5 and the handle 23.

  The rear leg frame 3 includes a substantially U-shaped frame main body 31 made of a steel round pipe, a rotation support 32 attached to the upper end of the frame main body 31 and supported to be rotatable with respect to the front leg frame 2, and a frame main body. In the lower end portion, for example, it has installation members 33 attached at two places. Specifically, the rear leg frame 3 is connected to the outer side of the front leg frame 2 via a rotation support 32 so as to be rotatable relative to the front leg frame 2. In this embodiment, the rotary support 32 has a slider 34 that can change the relative distance between the frame body 31 and the front leg frame 2. Thereby, the center of rotation of the rear leg frame 3 and the seat 4, the front leg frame 2 and the rear leg generated when the seat 4, the front and rear leg frames 2 and 3 are rotated between the use state (P) and the folded state (Q). The displacement of the separation distance from the rotation center of the frame 3 is absorbed.

  As described above, the seat 4 is rotatably attached to each of the front leg frame 2 and the rear leg frame 3, and by setting the thickness dimension to be smaller than both the frames 2 and 3, both seats 4 are folded in the Q state. The frame 2 or 3 can be accommodated within the thickness range. The seat 4 is configured to be able to rotate in a forward / reverse direction with respect to a seat body 41 that receives a load of a seated person, a front pivotal attachment portion 42 that is connected to the front leg frame 2 so as to be rotatable in the forward / reverse direction, And a rear pivot part 43 to be connected. The seat body 41 includes, for example, a net-like tension fabric that is attached in a state of being stretched in an opening of a substantially square-shaped seat receiving portion having an opening in the center, or a resin Various existing configurations, such as those that are integrally formed, can be applied.

  Therefore, as described above, the chair 1 according to this embodiment includes the shape retaining region 51 in which the back plate 5 provided on the front leg frame 2 is not easily deformed in the thickness direction, and the deformation region 52 that is easily deformed in the thickness direction. It is characterized by having.

  As shown in FIG. 1 and FIGS. 5 to 7, the back plate 5 is provided with a so-called round so that in the present embodiment, the upper frame 22 is integrally formed so that its thickness is uniform and bulges backward. It has a curved shape. The back plate 5 is positioned so as to be located behind the front end surface 2a of the front leg frame 2 and in front of the rear end surface 2b. That is, the back plate 5 is positioned within the thickness range of the front leg frame 2. More specifically, the back plate 5 is constructed such that the front surface 5a of the upper end 5c is installed linearly in the vicinity of the front end surface 2a of the left and right front leg frames 2, while the center 5e is gradually positioned rearward as it goes downward. It is curved. Then, both sides of the lower end 5d of the back plate 5 are connected to a substantially central portion in the thickness direction of the front leg frame 2, and the degree of curvature is the largest at the rear surface 5b of the center 5e at the lower end 5d and in the vicinity of the rear end surface 2b of the front leg frame 2 in side view. It is positioned. The back plate 5 has a shape-retaining region 51 that can hold the shape of the back plate 5 itself positioned on both side ends, that is, the upper side continuous to the upper end and the upper frame 22, and a partial circular shape from the lower end. In this case, the lower side has a shape having a larger width dimension and a deformation region 52 connected to the shape retaining region 51. The shape retaining region 51 is made of, for example, the same material as that of the upper frame 22, that is, a material such as a hard resin that is difficult to be deformed when a user loads or carries it. The upper end of the shape retaining region 51, that is, the upper end 5 c of the back plate 5 is formed with the grip region S interposed with respect to the handle 23. As shown in FIGS. 4 and 7, the deformation region 52 is made of a material that can be appropriately deformed when a seated person loads or carries it, such as an elastic material or a cushioning material. Although it is formed by two-color molding together with the frame 22 and the shape-retaining region 51, it is of course possible to separately attach a separate material.

  Here, at least a part of the deformation region 52 can be deformed to the front side of the front end surface 2a of the front leg frame 2 or to the rear side of the rear end surface 2b as shown in FIGS. Yes. As described above, the deformation region 52 has a partial circular shape with a larger width dimension in the downward direction, so that the front surface 5a or the rear surface 5b which is the lower end 5d of the back plate 5 and located at the center 5e can be moved most greatly by deformation. It is like that. As a result, as shown in FIG. 4, the deformation region 52 is greatly deformed beyond the rear end surface 2 b of the front leg frame 2 at the lower end of the back plate 5 when the user is seated. Thereby, even if the seated person sits deeply on the chair 1 and applies a load from the front, the lower end 5d side of the back plate 5 does not interfere with the upper body due to the deformation of the deformation region 52, and the area of the seat 4 is effectively utilized. While contributing to a comfortable sitting comfort.

  In particular, in the present embodiment, as shown in FIGS. 6 and 7, the back plate 5 having a substantially flat plate shape is positioned in the vicinity of the rear end surface 2 b, the lower end 5 d of which is the rear end in the thickness range of the front leg frame 2. An imaginary straight line V extending further upward from the lower end of the back plate 5 through the upper end so that the upper end of the back plate 5 is positioned near the front end in the thickness range of the front leg frame 2, that is, the front end surface 2a. Also, the back plate 5 is positioned so as to pass forward. Thus, even if the user sits deeply on the chair 1 and applies a load to the back plate 5 from the front as described above, the upper body is positioned in front of the virtual straight line V. Therefore, the handle front surface 23a does not interfere with the upper body of the seated person.

  Further, in the present embodiment, as shown in FIG. 8, the deformation region 52 is disposed substantially in the entire width direction at the lower end 5 d, so when carrying a plurality of chairs 1 having the same configuration, the plurality of deformation regions 52 are provided. Easy to hold together. In addition, at this time, the plurality of deformation regions 52 are appropriately deformed as shown in the figure, so that the user can carry the plurality of chairs 1 comfortably and simply.

  By setting it as the above structures, since the chair 1 which concerns on this embodiment can deform | transform suitably the back board 5 located in the range of the thickness of the front leg frame 2 according to the load to a user's state. It can provide a comfortable sitting comfort for the user. Of course, since the back plate 5 is positioned within the thickness range of the front leg frame 2, it contributes to a compact folded state (Q). That is, the chair 1 is realized that can achieve both a compact folded state (Q) and a comfortable sitting state (P).

  In the present embodiment, at least a part of the deformation region 52 can be deformed outward beyond the thickness of the front leg frame 2 in order to make the back plate 5 easier to deform along the upper body of the user.

  In the present embodiment, the shape retaining region 51 is formed in order to realize that the back plate 5 reliably supports the upper body of the seated person and deforms along the upper body to ensure a suitable sitting comfort. The constituent material and the constituent material of the deformation area 52 are different.

  In order to more suitably support the upper body of the seated person, the shape retaining region 51 is positioned above the back plate 5 and the deformation region 52 is positioned below the back plate 5 and the lower side of the back plate 5 is rearward By deforming, the user can sit deeply on the chair 1, that is, the area of the seat 4 can be used effectively. In the present embodiment, the deformation area 52 can be deformed along the upper body of the user. In this embodiment, the width dimension of the deformation area 52 is set to increase toward the lower side.

  In the present embodiment, a grip 23 is provided above the flat back plate 5 so as to secure the user's sitting comfort and facilitate the handling in the folded state (Q), from the lower end of the back plate 5. The back plate 5 is positioned so that a virtual straight line V that passes further upward through the upper end passes through the front of the front surface of the handle 23. Thereby, it can avoid effectively that the handle 23 interferes with the upper body of the user seated in the use state (P).

<Modification>
Next, modified examples of the present embodiment will be described with reference to FIGS. In this modification, components corresponding to the components of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the back plate 5 shown in FIGS. 9 to 11, the front surface 5a of the upper end 5c is installed in a straight line near the front end surface 2a of the left and right front leg frames 2 as in the above embodiment. 5e has a curved shape so as to be positioned rearward. Then, both sides of the lower end 5d of the back plate 5 are connected to a substantially central portion in the thickness direction of the front leg frame 2, and the degree of curvature is the largest at the rear surface 5b of the center 5e at the lower end 5d and in the vicinity of the rear end surface 2b of the front leg frame 2 in side view. It is positioned.

  In the above embodiment, the shape retaining region 51 and the deformation region 52 are made of different materials by, for example, two-color molding or the like, but the shape retaining region 51 can be formed even if the back plate 5 is made of the same material. In addition, the deformation region 52 can be preferably realized. That is, the chair 1 according to this modification is formed by integrally forming the back plate 5 and the deformation region 52 has a deformation promoting portion 53 that can promote deformation. Hereinafter, the deformation assisting portion 53 will be described with reference to FIGS.

  The back plate 5 shown in FIG. 9 shows an aspect in which a thin portion and a slit 55 are adopted as the deformation promoting portion 53. Specifically, by forming a pair of slits 55 by cutting out approximately half of the lower side in the vicinity of both sides of the back plate 5 and making the thickness of the material between the slits 55 a thin thin part, Even the same material as the shape-retaining region 51 can be suitably deformed.

  The back board 5 shown in FIG. 10 has shown the aspect which employ | adopted the opening 56 as the deformation | transformation promotion part 53. FIG. In such a case, the load applied to the deformation region 52 is concentrated on the material around the opening 56 and applied. As a result, even the same material as the shape retaining region 51 can be suitably deformed.

  The back board 5 shown in FIG. 11 has shown the aspect which employ | adopted the thin part and the gusset 57 as the deformation | transformation promotion part 53. FIG. Specifically, for example, the gusset 57 is formed at both ends of the thin portion with the same thickness and slightly detoured to the rear of the dimension, so that the thin portion is easily bent and deformed.

  Even if it is such, the chair 1 which implement | achieved both the compact folding state (Q) and the comfortable use state (P) like the said embodiment is implement | achieved.

  Although the embodiment of the present invention has been described above, the specific configuration of each unit is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the above-described embodiment, an aspect in which the shape-retaining region and the deformation region are formed flush with each other is disclosed, but of course, the deformation promotion as shown in FIGS. 9 to 11 is applied to the deformation region of the material different from the shape-retaining region. A part may be provided. Moreover, specific aspects, such as a seat and the axial attachment location of each part, are not limited to the thing of the said embodiment, The thing of a various aspect including an existing thing is applicable.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

  The present invention can be used as a foldable chair used in a conference room or a meeting place.

1 ... chair 2 ... first leg frame (front leg frame)
23a: Front of the handle (front of the handle)
3 ... Second leg frame (rear leg frame)
DESCRIPTION OF SYMBOLS 4 ... Seat 5 ... Back board 51 ... Shape retention area | region 52 ... Deformation area | region 53 ... Deformation promotion part P ... Use state Q ... Folded state V ... Virtual straight line

Claims (5)

A seat, a first leg frame that rotatably supports one end of the seat in a forward / reverse direction, and a first leg frame that is rotatably coupled to the first leg frame in a forward / reverse direction. A second leg frame that rotatably supports the other end side in the forward and reverse directions, and the first leg frame, the second leg frame, and the seat are moved from the use state by relative rotation of the first leg frame, the second leg frame, and the seat. A chair configured to be folded into a folded state in which the second leg frame is substantially flush,
A back plate is provided between the first leg frames and has a back plate positioned so that the thickness is within the thickness range of the first leg frame,
The back plate has a shape retaining region that is difficult to deform in the thickness direction and can retain the shape of the back plate itself, and a deformation region that is easily deformed in the thickness direction ,
The shape retaining region is positioned above the back plate and the deformation region is positioned below the back plate,
The chair characterized by the width dimension of the said deformation | transformation area | region being set so that it may become large toward the lower side . The chair according to claim 1, wherein at least a part of the deformation region can be deformed outward from a thickness of the first leg frame. The chair according to claim 1 or 2, wherein a material constituting the shape retaining region and a material constituting the deformation region are different. The chair according to claim 1 or 2, wherein the back plate is formed integrally, and the deformation region has a deformation promoting portion that can promote deformation. A handle is provided above the back plate, and the back plate has a substantially flat plate shape. A virtual straight line extending from the lower end of the back plate to the upper side through the upper end is formed from the front surface of the handle. The chair according to 1, 2, 3 or 4 , wherein the back plate is positioned so as to pass forward.

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