JP5802090B2 - Folding chair - Google Patents

Description

  The present invention relates to a folding chair, and more particularly to a folding chair that is folded so as to converge in the center when stored.

  In recent years, with the diversification of outdoor leisure, there is an increasing demand for folding chairs that can be relaxed and fold in a compact manner. If the folding chair can be folded into a rod shape, it can be placed in a limited storage space such as a trunk of a car or a luggage compartment, thereby improving convenience. Such a folding chair is generally called a convergence type, and various types of folding chairs have been developed.

The basic structure for implementing the folding of such convergent type, as disclosed in Patent Document 1, two leg members each of which is connected to the rotatable X-shaped at an intermediate portion It has a front / rear / left / right leg structure. These four leg structure by rotating the closing directions of the leg member, it is possible to converge these leg structure in its central direction.

  By the way, in such a folding chair, in order to improve the seating comfort, a structural device for arranging the seating surface and the backrest at a predetermined angle and a structural device for providing an armrest are applied. Yes.

  In the structure of Patent Document 1, two vertical members are provided on the rear side of the chair, and the lower end portions of the rear leg structure and the left and right leg structures are fixed to the lower end portion thereof so as to be rotatable. Is slidably fixed, and the upper end of the vertical member is inclined rearward to form a backrest, so that stability is maintained even when the user sits and leans on the back side I have to. Further, the upper end portion of the front leg structure is extended upward, and an armrest made of a flexible material is stretched between the upper end portion and an intermediate portion near the upper end of the vertical member.

  However, in this structure, the load on the backrest is supported only by the upper end side of the vertical member, the rigidity of the backrest is not sufficient, and the angle of the backrest is limited. In addition, since the armrest is a flexible material, there is a problem that when the user stands up, the weight cannot be applied to the armrest.

  On the other hand, in Patent Document 2, of the leg members constituting the left and right leg structures, a leg member extending from the front lower side to the rear upper side is a long long leg body, and the other leg member is an intermediate portion of the long leg body. A short leg that is pivotably connected to the rear leg, and the upper end of the rear leg structure is pivotally connected to the upper end portion of the long leg so that the long leg and the rear leg structure The backrest having a predetermined angle from the seating surface and having a high rigidity and the support structure thereof are configured.

  In addition, the front side of the chair is provided with two front pillars that can be telescopically expanded and contracted. The lower end of the front leg structure and the lower end of the long leg are fixed to be rotatable, and the middle part of the front leg structure The upper end of the is fixed to be rotatable via a link structure. In addition, left and right seating surface members for supporting the seating surface are spanned between the intermediate portions of the front pillars on both sides and the upper ends of the short legs so as to be pivotably connected to each other. Further, the left and right armrest members extend rearward from the upper end portions of the left and right front pillars, and the rear end portion is rotatably connected to the upper end portion of the long leg through the link structure. . As a result, a highly rigid armrest structure is provided, and at the time of folding, the armrest member and the front post body are folded along the long legs so as to have a rigid armrest member, but a convergent type. Folding structure is realized.

  However, in the conventional folding chair, in any structure, the front leg structure or the front pillar body is extended upward from the seating surface, and the armrest member is hung between the upper end portion and the rear member, Need to construct an armrest. Thus, in order to ensure the stability and load resistance of the armrest member, not only the rear end portion of the armrest member is connected to the rear member of the chair, but also the front end portion of the armrest member is the front member of the chair. Therefore, the degree of freedom in designing the armrest member and its peripheral portion is extremely limited. In addition, there is a problem that the user cannot be used flexibly according to the actual use situation, such as sitting sideways with respect to the chair.

JP 2000-135144 A Japanese Patent No. 3788455

  An object of the present invention is to provide a converging type folding chair that can be seated sideways with respect to a folding chair without being connected to other members around the front end portion of the armrest and that can be folded into a rod shape. Objective.

  The folding chair of the present invention includes a pair of side leg structures disposed on the left and right sides, a pair of seat support structures, a pair of armrest structures, and both front and rear sides of the structures disposed on the left and right sides. And two connecting structures for connecting them.

  Particularly in the present invention, each of the side leg structures includes a first side cross member in which a lower half portion constitutes a front leg and an upper half portion constitutes a backrest support portion, and the first side cross member. And a second side cross member that constitutes a rear leg.

  Each of the seating surface support structures is pivotally connected to a lower end portion of the first side cross member, and a front column body that can be expanded and contracted, and a front end portion is an upper end portion of the front column body And a seating surface support member that is pivotally connected to the upper end portion of the second side cross member so as to be rotatable and slidable.

  Each of the armrest structures is supported by one or both cross members of the lateral leg structure between the rear end portion and the intermediate portion, and is not supported by other members from the intermediate portion to the front end portion thereof. It is characterized by that.

  In the present invention, the armrest structure extends substantially parallel to the seating surface and is not supported by other members from the middle part to the front end part thereof, so that the armrest structure enters from the front side between the armrest structure and the seating surface. It is characterized in that a possible space is constructed. In the present invention, the rigidity of the armrest structure is maintained by the above configuration.

More specifically, in the first aspect, the armrest structure includes an armrest member and a link body, and the rear end portion of the armrest member is the intermediate portion of the first side crossing member and the upper end portion. At a position near the rear end of the middle part of the armrest member, the second side crossing is supported by the first side crossing member via the link body so as to be rotatable. The upper end of the member is rotatably supported.

  In the second aspect, the armrest structure is constituted by an extension portion that extends from the distal end portion of the second side cross member.

  The folding chair structure of the present invention is characterized in that the backrest and the seating surface can be configured with a predetermined angle and a stable structure. As described above, when the armrest structure is configured with rigidity, the armrest and the seat are structured. There is a feature in that the space between the surfaces can be effectively used, and the feature is not limited to the convergence type, but can be applied to a front-rear folding structure. However, it is preferably applied to a convergent structure.

  In order to obtain a converging type structure, of the two connection structures, the front connection structure is constituted by two front connection members each having an intermediate portion rotatably connected thereto, and the lower end portion of the front connection member Is pivotably connected to the lower end portion of the front pillar body, and the upper end portion thereof is pivotally connected to the upper end portion of the front pillar body, and the rear connection structure is respectively pivoted at the intermediate portion. It is composed of two rear connecting members that are connected to each other, and a lower end portion of the rear connecting member is rotatably connected to a lower end portion of the second side crossing member, and an upper end portion thereof is The first side cross member is connected to an upper end portion of the first side cross member so as to be able to rotate and slide.

  According to the present invention, there is provided a folding chair in which an armrest member is not supported by other members from an intermediate portion to a front end portion thereof. Thereby, not only the freedom degree of design of a folding chair increases, but it can sit down sideways with respect to a chair, and it becomes possible to provide an easy-to-use folding chair.

FIG. 1 is a perspective view showing an embodiment of the folding chair of the present invention. FIG. 2 is a schematic left side view of the folding chair of FIG. FIG. 3 is a schematic front view of the folding chair of FIG. 4 is a schematic rear view of the folding chair of FIG. FIG. 5 is a diagram schematically showing a folding mechanism of the folding chair of FIG. 6 is a perspective view showing a folded state of the folding chair of FIG. FIG. 7 is a schematic left side view showing another embodiment of the folding chair of the present invention.

  The basic structure of the folding chair of the present invention is the same as the conventional converging type folding chair structure, and the first side cross member 4a, 5a and the second side cross member 4b, 4c, 5b. 5c, side leg structures 4, 5; bearing surface support structures 2, 7; and armrest structures 8, 8a, 24 are provided at the left and right ends, respectively. These structures on both sides are connected by two connecting structures 3 and 6 arranged on the front and rear sides. In the case of the converging type, these connecting structures 3 and 6 are also constituted by two cross members 3a, 3b, 6a and 6b whose intermediate portions are connected to each other so as to be able to rotate.

  The first side cross members 4a and 5a constitute a back support portion that holds both ends of the back portion 12b of the seat member 12 whose upper half constitutes the back, and the lower half constitutes the front leg. .

  The second side cross members 4b, 4c, 5b, and 5c constitute rear legs. These first and second side cross members 4a to 5c are located at a position close to the middle of the first side cross members 4a and 5a and the upper end of the second side cross members 4b to 5c. It is pivotally connected. In particular, the present invention is characterized in that the armrest structures 8, 8a, 24 are supported by one or both of the side cross members 4a-5c between the rear end portion and the intermediate portion thereof.

  In this way, by using the side cross members 4a to 5c to support the armrest structures 8, 8a, 24, the armrest structures 8, 8a, 24 are supported by other members from the intermediate portion to the front end portion thereof. Because it is not necessary, the flexibility of the design of the folding chair is increased, and it is possible to sit sideways with respect to the chair, so that it can be used flexibly according to the usage situation. Yes.

  Hereinafter, the present invention will be described in detail, but the present invention is not limited to the following embodiments, and can be widely applied to other general folding chairs. Also, each member of the folding chair according to the present invention is not particularly limited, and a known material such as wooden or metal processed into a rod shape or a pipe shape can be used.

  In the following description, the front-rear direction and the left-right direction mean the front-rear direction and the left-right direction in a state of sitting on a folding chair.

[About the first embodiment]
A first embodiment of the structure of the convergent folding chair of the present invention will be described in detail with reference to FIGS.

  The basic structure of the folding chair 1 of the first embodiment includes a pair of side leg structures 4 and 5, a pair of seating surface support structures 2 and 7, a pair of armrest structures 8 and 24, and these structures. The front and rear leg structures 3 and 6 connect the front and rear legs.

  The pair of front pillars 2 constituting the seat support structure constitutes the front leg of the folding chair 1 together with the first side cross members 4a and 5a, and supports the seat surface during folding. The pair of seating surface supporting members 7 constituting the structure are telescopic structures 2a and 2b so that they can expand as they are raised upward. Since such a structure is publicly known, description thereof is omitted here.

  The front leg structure 3 which is a front side connection structure includes a first front side cross member 3a and a second front side cross member 3b which constitute a front side connection member, and can be rotated by a rotary shaft 9 at each intermediate portion. It is connected.

  The first front cross member 3a has an upper end portion connected to the upper end portion of the left front column body 2 and a lower end portion connected to the lower end portion of the right front column body 2 via a connecting body 10, respectively. 11 is rotatably attached. Similarly, the second front cross member 3b has an upper end portion connected to the upper end portion of the right front column body 2 and a lower end portion connected to the lower end portion of the left front column body 2 via the connecting body 10. The moving shaft 11 is rotatably attached. Accordingly, these front side connecting members are rotatably connected to the first side cross members 4a and 5a constituting the side leg structures 4 and 5 via the front pillar body 2.

  The side leg structures 4 and 5 have first side cross members 4a and 5a whose upper half portions respectively hold the end portions of the backrest portion 12b of the seat member 12 and whose lower half portions constitute the front legs. It consists of 2nd side crossing members 4b and 5b which comprise a back leg. These side leg structures 4 and 5 are rotated by the rotation shaft 13 at positions near the intermediate portions of the first side cross members 4a and 5a and the upper ends of the second side cross members 4b and 5b. It is linked movably.

The rear leg structure 6 which is a rear connection structure is composed of a first rear cross member 6a and a second rear cross member 6b constituting the rear connection member. 14 is rotatably connected. The first rear cross member 6a has an upper end slidable on the upper end of the left first side cross member 4a via the connecting body 15 and is rotated by the rotary shaft 16. The lower end portion of the first side cross member 5a on the right side is rotatably connected to the lower end portion of the right side crossing member 5a via the connecting body 15 so as to be rotatable. Similarly, the second rear cross member 6b has an upper end slidable to the upper end of the right first cross member 5a via the connecting body 15 and is rotated by the rotating shaft 16. The lower end portion of the first side cross member 4a on the left side is rotatably connected to the lower end portion of the first side crossing member 4a via the connecting body 15 so as to be rotatable.

  The seating surface support member 7 constituting the seating surface support structure is connected at its rear end portion to a sliding body 17 externally fitted to the second side crossing members 4b and 5b so as to be rotatable by a rotation shaft 18. ing. A connecting body 20 is attached near the front end of the front column body 2 so as to be pivotable by a pivot shaft 19.

  Further, engaging grooves 21 are provided on both side surfaces of the sliding body 17, and the engaging grooves 21 are engaged with the locking shafts 22 attached to the second side cross members 4b and 5b. The position of the sliding body 17 in the unfolded state of the folding chair 1 is fixed, and the posture of the folding chair is maintained in a stable state. The position of the locking shaft 22 is preferably provided at a position where the seat support member 7 is substantially horizontal or the rear end of the seat support member 7 is slightly below the front end.

  In the present embodiment, the armrest member 8 constituting the armrest structure is connected to the link body 24 by the pivot shaft 23 so that the rear end portion thereof is pivotable so as to be substantially parallel to the seating surface support member 7. By connecting the body 24 at a position closer to the upper end than the substantially intermediate portion of the first side crossing members 4 a and 5 a so that the body 24 can be rotated by the rotation shaft 25, the armrest member 8 is connected via the link body 24. 1 side crossing members 4a and 5a. Further, the armrest member 8 is rotatably connected to the distal end portion of the second side crossing members 4b and 5b between the rear end portion and the intermediate portion thereof by the rotation shaft 26 via the connecting body 27. Thus, the structure is supported by the second side cross members 4b and 5b.

  In the conventional folding type folding chair, from the viewpoint of ensuring armrest stability and load resistance, the armrest member is not limited to the rear end, and the front end portion of the armrest member also has a front leg structure such as a front pillar or front cross member. Adopted a supported structure. For this reason, the degree of freedom in designing the armrest is limited, and it is not possible to flexibly use it according to the actual usage situation, such as sitting sideways with respect to the chair. On the other hand, in this embodiment, the armrest member 8 has the first and second side cross members 4a, 5a, 4b, at two points closer to the rear end than the rear end and the middle. Since it is firmly supported by 5b, it is possible to increase the degree of freedom of design while maintaining the stability of the armrest and the load resistance, and to use it flexibly according to the use situation. When the armrest member 8 is formed of a metal pipe or the like, the elbow is placed on the armrest by attaching a wooden plate member on the upper surface or covering it with a member such as sponge or foamed urethane. The feeling of use can be enhanced. It is also possible to attach a drink holder or the like to the front end of the armrest member 8.

  The seat member 12 is a continuous flexible cloth body, and includes a seat surface portion 12a that supports the user's thigh and a backrest portion 12b that is inclined rearward and supports the user's back. About a raw material and sewing, a well-known thing can be used, without being specifically limited.

  Next, the folding mechanism of the present embodiment will be described with reference to FIGS. As described above, the basic structure of the present embodiment is the same as that of a general converging type folding chair, and the folding mechanism is basically the same. Therefore, hereinafter, the armrest member 8 at the time of folding will be described. The explanation will focus on movement.

In this embodiment, when the folding chair 1 in the unfolded state shown in FIG. 5 (a) is folded, the whole is converged in the center direction. At this time, the armrest member 8 has a rear end. As the link body 24 connected to the part pivots to the rear side, the link body 24 is pulled by the link body 24 and the front end thereof is raised upward (see FIG. 5B). At the same time, the sliding support 17 connected to the rear end of the seating surface support member 7 slides the second side crossing members 4b and 5b downward in the length direction, and the telescopic support of the front column 2 is also provided. By extending in a scope shape, the arm member is raised upward as in the armrest member 8 (see FIG. 5B). Finally, reference armrest member 8 and the seat surface support member 7 is caused to be substantially parallel to the other member, which is a state of being folded into a rod (a state of being converged on center) (FIG. 5 (c) ).

  In addition, as long as the attitude | position of a folding chair can be maintained in a stable state, in order to make the folding operation | movement mentioned above smooth, it is good also considering the connection body which connects each member of this invention as a sliding body.

FIG. 6 shows a state in which the folding chair of this embodiment is folded. As shown in this figure, in the folded state, the members are substantially parallel and the overall shape is a rod, so that the structure is excellent in portability.
[About the second embodiment]
FIG. 7 shows a second embodiment of the folding chair of the present invention. The basic structure is the same as that of a general convergent folding chair, similar to the first embodiment described above.

  In this embodiment, in particular, the armrest member 8a is formed by extending the distal end portion of the second side cross member 4c, 5c in a direction substantially parallel to the seating surface support member 7. To do. In such a structure, the armrest member 8a may be formed integrally with the second side crossing members 4c and 5c, or a substantially J-shaped or substantially L-shaped armrest member may be formed on the second side. You may form by attaching to the front-end | tip part of the direction crossing members 4c and 5c.

  The folding mechanism of this embodiment is basically the same as that of the first embodiment. However, since the armrest member 8a is formed integrally with the second side crossing members 4c and 5c, this portion is The armrest member slightly protrudes outward when folded without being operated. However, the structure of this embodiment can reduce the number of parts compared to the first embodiment, and the structure itself can be made simpler.

1, 1a Folding chair 2 Front pillar 3 Front connection structure (front leg structure)
3a 1st front cross member 3b 2nd front cross member 4, 5 side leg structure 4a, 5a 1st side cross member 4b, 4c, 5b, 5c 2nd side cross member 6 back side connection structure (Rear leg structure)
6a First rear cross member 6b Second rear cross member 7 Seat surface support member 8, 8a Armrest member 9 Rotating shaft 10 Connecting body 11 Rotating shaft 12 Seat member 12a Seat surface portion 12b Backrest portion 13 Rotating shaft DESCRIPTION OF SYMBOLS 14 Rotating shaft 15 Connecting body 16 Rotating shaft 17 Sliding body 18 Rotating shaft 19 Rotating shaft 20 Connecting body 21 Rotating shaft 22 Engaging groove 23 Locking shaft 24 Link body 25 Rotating shaft 26 Rotating shaft 27 Connecting body

Claims (2)

A pair of side leg structures arranged on the left and right sides, a pair of seating surface support structures, a pair of armrest structures, and a structure arranged on the left and right sides of these structures are arranged on the front and rear sides, and these are connected. Two connecting structures
Each of the side leg structures has a first side cross member in which the lower half constitutes a front leg and the upper half constitutes a back support part, and an upper end at an intermediate part of the first side cross member. And the second side crossing member that is pivotally connected and constitutes the rear leg,
Each of the seating surface support structures is rotatably connected to a lower end portion of the first lateral cross member, and a front pillar body that can be expanded and contracted, and a front end closer portion rotate around the upper end portion of the front pillar body. A seat surface support member that is movably connected and has a rear end portion that is rotatably and slidably connected to an upper end portion of the second side cross member.
Each of the armrest structures is constituted by an extension portion extending from the tip end portion of the second side cross member, and is not supported by other members from the intermediate portion to the front end portion thereof. Chair.   Of the two connection structures, the front connection structure is composed of two front connection members each having an intermediate portion rotatably connected thereto, and the lower end portion of the front connection member is connected to the lower end portion of the front column body. The upper end portion of the front pillar body is rotatably connected to the upper end portion of the front pillar body, and the rear connection structure includes two rear side connections in which the intermediate portions are rotatably connected. And a lower end portion of the rear side connecting member is rotatably connected to a lower end portion of the second side cross member, and an upper end portion of the rear side connection member is a portion closer to the upper end of the first side cross member. The folding chair according to claim 1, wherein the folding chair is pivotably and slidably connected to the chair.

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