JP2007202591A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To integrally continue a backrest to a seat by avoiding the concentration of a load applied to the backrest. <P>SOLUTION: This chair includes a support structure 1, the seat supported by the support structure 1, and the backrest 3 supported by raised parts 12 of the support structures 1, which are raised independently at a rear edge part 21 of the seat 2 and at the back edge part 21 of the seat 2; the seat 2 has fitting parts 4 distributing the load applied to the raised parts 12 of the support structures 1; and the backrest 3 has insertion holes 61 for inserting each of the raised parts 12 of the support structures 1, and has connection parts 6 integrated by inserting the raised parts 12 of the support structures 1 in the respective insertion holes 61 and engaging with the fitting parts 4, and distributing the load by cooperating with the fitting parts 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a chair in which a seat and a backrest are integrally continuous.

Conventionally, in a chair in which the seat and the backrest are not integrated, a chair having a structure in which the backrest is attached in the vicinity of the left and right ends of the rear edge portion of the seat is known in order to form an external appearance in which both are integrally continuous. For example, in the thing of patent document 1, the backrest which inserts the stem of a connection member to the support structure body which supports a seat is attached, and it is made the external appearance which a seat and a backrest continue integrally. In the chair described in Patent Document 1, the stem is about ½ the height of the backrest, and is tilted backward with respect to the stationary position in response to the pressing force applied by the user. Thus, the connecting member is attached to the support structure via a spring.
Japanese Patent Laid-Open No. 2005-205210

  However, with such a configuration, the connecting member for attaching the backrest is separate from the main body of the backrest, and the connecting member is attached to the support structure via a spring. It tended to be complicated.

  As a chair such that the seat and the backrest seem to be integrated, a pipe is used as the support structure, and the upper end of the rear leg constituting the support structure is extended above the seat, and the upper end of the extended rear leg It is also known that a backrest is attached so as to cover the outer surface of the seat, and the outer surface of the backrest is continuous with the outer surface of the seat so that the seat and the backrest are integrally continuous. In such a chair, since the backrest is attached to the extended portion of the rear leg, when the user applies a pressing force to the backrest due to the flexion of the extended portion and the backrest, the chair is slightly inclined backward. It is supposed to be.

  By the way, the seat is attached to the pipe for supporting the seat welded to the rear leg, but as described above, when the user applies a pressing force backward, the seat is pulled forward, A force is applied to the welded portion between the pipe supporting the seat and the rear leg so as to separate them. Further, even when the user looks back and the rearward pressing force is biased to the extension part of one rear leg, the backrest is bent so that the backrest rotates. Concentrated on the welded part, and contributed to a decrease in durability.

  The present invention has been made paying attention to such a problem, and a main purpose thereof is to provide a chair capable of integrally continuing the backrest and the seat while avoiding the concentration of the load applied to the backrest. There is to do.

  That is, the chair of the present invention is supported by the support structure, the seat supported by the support structure, and the standing structure of the support structure that stands individually at the rear edge of the seat, and stands at the rear edge of the seat. An insertion hole comprising a backrest, wherein the seat comprises a fitting portion that disperses a load applied to the upright portion of the support structure, and the backrest is inserted into each of the upright portions of the support structure. Each of the insertion holes has a connecting portion for dispersing the load in cooperation with the fitting portion. It is characterized by.

  According to such a configuration, the fitting portion of the seat and the joint portion of the backrest are integrated by inserting the upright portion of the support structure into the insertion hole, and the support structure is raised via the backrest during use. The load applied to the portion is distributed to the fitting portion and the coupling portion which are integrated. Therefore, it is possible to improve the durability because the load is not concentrated on a part of the upright portion of the support structure.

  In order to facilitate the engagement between the fitting portion and the coupling portion, the fitting portion is provided at the left and right end portions of the rear edge portion of the seat, and has a shape that is long in a direction close to the end portion. The engaging projection is formed, and the coupling portion is provided with an engaging recess that surrounds the opening of the insertion hole and engages with the engaging projection, and the engaging projection and the engaging recess are engaged with each other. In this case, it is preferable that the surface in the vicinity is substantially flush.

  In order to facilitate the positioning of the seat with respect to the support structure, the seat has a through-hole that is provided at a position separated from the rear edge of the seat and through which each upright portion of the support structure passes. What the engagement convex part surrounds is preferable.

  In order to reduce the burden on the support structure, the seat and the backrest are each composed of a frame and a surface forming member stretched on the frame, and a fitting portion is provided on the frame of the seat and coupled to the frame of the backrest. What is provided with a part is suitable. In such a configuration, the surface molding member may be a mesh-like woven fabric.

  The present invention is configured as described above, and the seat and the backrest are integrated at the position of the fitting portion and the coupling portion, and the integrated fitting portion and the coupling portion allow the backrest during use. Thus, the load applied to the upright portion of the support structure is dispersed, that is, the load is not concentrated on a part of the upright portion of the support structure, whereby durability can be improved.

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

  The chair 100 according to this embodiment includes a support structure 1, a seat 2 and a backrest 3 supported by the support structure 1, and has a structure in which a plurality are stacked for storage.

  The support structure 1 is made of, for example, a metal pipe, specifically, an iron pipe member. The left and right leg parts 11 and a seat support part (not shown) formed integrally with the leg parts 11 in a continuous manner. And an upright portion 12 that is a back support portion that extends upward from the leg portion 11 and supports the backrest 3. In addition, as illustrated in FIG. 2, the upright portions 12 are individually raised to the left and right at the rear portion of the support structure 1, and are not structures in which the upper ends are connected to each other. Therefore, the upper edge portion 32 of the backrest 3 is not configured to be supported by the support structure 1.

  The left and right leg portions 11 are manufactured by bending a single pipe member, and have a shape in which the front leg portion 11a and the rear leg portion 11b are connected to each other at the lower ends by the connecting portions 11c. And the upper end of the front leg part 11a is extended to the lower surface of the seat 2, and becomes a seat support part. The seat support portion is formed so as to support the seat 2 on the lower surfaces of the front and rear edges of the seat 2. The seat support portion is configured such that the pipe member constituting the leg portion 11 is extended along the lower surfaces of the left and right edges of the seat 2 to support the left and right edges of the seat 2, and the pipe member is further extended to The lower surface of the rear edge portion 21 is supported by a pipe member that reaches the lower surface of the rear edge portion 21 and connects the tips thereof. The front edge portion 22 of the seat 2 is supported by a sheet metal connecting the bent portions at the upper end of the front leg portion 11a. Moreover, the backrest 3 is supported by the right-and-left standing part 12 which stands up separately so that it may mention later. In this embodiment, the chair 100 has the armrest 13. However, the present invention can be applied to an object without the armrest.

  The seat 2 and the backrest 3 are made of, for example, resin, in this embodiment, synthetic resin frames 23 and 33, and a mesh (mesh woven fabric) 24 that is a surface forming member stretched inside the frames 23 and 33. , 34.

  The seat 2 has a substantially square shape in plan view, the front edge portion 22 of the frame 23 is curved downward, and the rear edge portion 21 of the frame 23 has its center portion directed rearward. It has a slightly bulging shape and is wider than the front edge 22 in accordance with the width of the backrest 3. Further, the frame 23 of the seat 2 has a rear edge portion 21 that is thicker than other portions. Specifically, the left and right end portions 21 a and 21 b of the rear edge portion 21 are thicker than the central portion 21 c, and the thick portions, that is, the left and right end portions 21 a of the rear edge portion 21 of the frame 23. , 21b are formed with fitting portions 4.

  The fitting portion 4 is provided at the end portions 21a and 21b of the rear edge portion 21 including the left and right protruding end portions projecting sideways from the side edge of the frame 23 of the seat 2. It continues from the left and right end portions 21a, 21b of the rear edge portion 21 to the thin central portion 21c of the rear edge portion 21 in a direction close to each other. The fitting portion 4 includes a through hole 41 and an engaging convex portion 42 that surrounds the opening 41a on the upper side of the through hole 41, both of which are integrally formed. The through hole 41 is provided at a portion protruding sideways from the side edge of the frame 2 of the seat 2, and penetrates from the thickness direction of the seat 2, that is, from the lower side of the seat 2 to the upper side. The through hole 41 has an inner diameter that is substantially equal to the outer diameter of the pipe member that constitutes the upright portion 12 of the support structure 1. The engaging projection 42 is formed in an oval shape or an ellipse shape curved from the opening 41 a on the upper side of the through hole 41, and is one step higher than the joint end surface 5 between the seat 2 and the backrest 3. In this embodiment, in order to reduce the weight, the inside of the engagement convex portion 42 is stealed and is reinforced by the reinforcing rib 42a. Therefore, the engaging convex portion 42 is substantially a wall that includes the periphery of the opening 41 a on the upper side of the through hole 41 and is substantially perpendicular to the joining end surface 5.

  Corresponding to such a seat 2, the backrest 3 has the following structure.

  The backrest 3 is curved so that the central portion thereof is located rearward from the left and right, and the upper half is inclined rearward from the lower half. As described above, the backrest 3 includes the frame 33 and the mesh 34 equivalent to the seat 2, and has the coupling portions 6 at the left and right end portions 31 a and 31 b of the lower edge portion 31 of the frame 33. . The lower edge portion 31 of the frame 33 is higher than the lower end of the coupling portion 6 at the lateral central portion 31c. The central portion 31c of the lower edge portion 31 corresponds to the thin portion of the rear edge portion 21 of the frame 23 of the seat 2, that is, the central portion 21c. When the seat 2 and the backrest 3 are joined, the chair 100 is It functions as an oval gripping operation unit when moving or stacking.

  Each coupling portion 6 has an insertion hole 61 and an opening 61 a that surrounds the lower end of the insertion hole 61 and has an elongated shape in a direction close to the end portions 31 a and 31 b of the lower edge portion 31 of the frame 33. It is provided with a mating recess 62, both of which are integrally formed. The insertion hole 61 is provided inside the left and right side portions of the frame 33, and the depth thereof is, for example, about 1/3 of the length of the left and right side portions. That is, the insertion hole 61 is not provided over the entire length of the side portion of the frame 33 but extends from the lower edge portion 31 to a height of about 1/3 of the backrest 3. The engagement recess 62 surrounding the opening 61 a of the insertion hole 61 has an oval or elliptical shape corresponding to the engagement protrusion 42 of the seat 2, and the height of the engagement protrusion 42. Has a depth corresponding to. Similarly to the engaging convex portion 42, the engaging concave portion 62 is also stealed, and a plurality of reinforcing ribs 62a are formed for reinforcement.

  In such a configuration, when the seat 2 is attached to the support structure 1, each standing portion 12 of the support structure 1 passes through each of the through holes 41 of the fitting portion 4 of the seat 2 and is above the mesh 24 of the seat 2. Protrudes to the position of. The seat 2 can be easily positioned with respect to the support structure 1 because the upright portion 12 passes through the through holes 41. With the seat 2 attached to the support structure 1 in this way, the upright portions 12 are inserted into the insertion holes 61 of the coupling portion 6 of the backrest 3. Then, the backrest 3 is pushed downward so that the engaging convex portion 42 is fitted into the engaging concave portion 62 so that the engaging concave portion 62 covers the engaging concave portion 62, that is, is engaged. In this engaged state, the joining end surface 5 in the fitting portion 4 comes into contact with, or is in close contact with, the downward end surface 65 in the coupling portion 6 without generating a gap. Therefore, the engaging portion between the engaging convex portion 42 and the engaging concave portion 62 is completely invisible from the outside, and thus the standing portion 12 of the support structure 1 is also invisible.

  In the type using the meshes 24 and 34 for the seat 2 and the backrest 3 as in the present embodiment, a tensile force is applied to the frames 23 and 33 from the meshes 24 and 34 stretched on the frames 23 and 33. The action may cause the frames 23 and 33 to twist. In the present embodiment, the pulling force acting on the frames 23 and 24 is regulated by the fitting portion 4 in the seat 2 and the coupling portion 6 in the backrest 3. That is, by configuring the fitting part 4 and the coupling part 6 in an oval shape or an elliptical shape, the tensile force in the front-rear direction and the left-right direction of each of the seat 2 and the backrest 3 is regulated, This prevents the occurrence of 33 twists.

  In addition, since no gap is generated between the fitting portion 4 and the coupling portion 6 in this way, the backrest 3 has an appearance that is integrally continuous with the seat 2 by this engagement. That is, the frame 23 of the seat 2 and the frame 33 of the backrest 3 are continuous with each other at the fitting portion 4 of the seat 2 and the coupling portion 6 of the backrest 3. Further, a gap SP is formed in the central portion 31c in the width direction of the lower edge portion 31 of the backrest 3 and the central portion 21c of the rear edge portion 21 of the seat 2.

  Thus, after supporting the seat 2 and the backrest 3 by the support structure 1 and connecting them together, the connecting portion of the backrest 3 is prevented so that the backrest 3 does not come off the upright portion 12 of the support structure 1. A retaining bolt (not shown) is inserted into a retaining hole 35 provided at the upper position of 6, and the bolt is screwed into the bolt hole 12 a of the standing portion 12 so that the backrest 3 cannot be removed from the support structure 1. .

  When the seat 2 and the backrest 3 are attached to and supported by the support structure 1 as described above, the upright portion 12 that supports the backrest 3 is covered with the fitting portion 4 and the coupling portion 6 and cannot be seen from the outside. And the fitting part 4 is long in the direction approaching from the left and right end parts 21a, 21b of the rear edge part 21 of the seat 2, has an engaging convex part 42, and the coupling part 6 has the engaging convex part 42. Therefore, the backrest 3 is accurately positioned with respect to the seat 2. As a result, it is possible to prevent a gap from being formed between the fitting portion 4 and the coupling portion 6, and the backrest 3 is continuously integrated with the seat 2 in a good-looking state without complicated work. Can be made.

  In use, the load applied to the upright portion 12 of the support structure 1 through the backrest 3 passes through the through-hole 41 in the fitting portion 4 of the seat 2. In the vicinity of the periphery, it is applied to a portion other than the upright portion 12 of the support structure 1. At this time, since the through hole 41 is formed integrally with the engaging convex portion 42 in the fitting portion 4, the load from the standing portion 12 is also transmitted to the engaging convex portion 42. Therefore, the load applied from the upright part 12 to the other part of the support structure 1 is distributed to at least the frame 23 of the seat 2 via the engaging convex part 42. In this case, since the engaging convex portion 42 is engaged with the engaging concave portion 62 of the backrest 3, the load is also distributed to the frame 33 of the backrest 3. Therefore, even when a large load is applied to the backrest 3 such as the majority of the weight of the user, a load applied to a specific part such as a connection portion between the standing portion 12 and the leg portion 11 of the support structure 1 is applied. As a result, durability can be improved.

  In addition, when the load is applied to one of the upright portions 12 by reversing the body in order to look back while the user is seated, the load applied to the upright portion 12 is As described above, since the fitting portion 4 and the coupling portion 6 are accurately dispersed, the backrest 3 can be moved as far as possible with the upright portion 12 to which no load is applied as the axis of rotational motion. Can be suppressed. Therefore, such a user's posture can be favorably supported, and the instability of the backrest 3 can be improved. In addition, since the load can be dispersed in this way, it is possible to use a pipe member constituting the support structure 1 having a low strength, in other words, a member having a small diameter, and thus reducing the weight. Can do.

  Moreover, the fitting portions 4 are provided at the left and right end portions 21 a and 21 b of the rear edge portion 21 of the seat 2 in this way, and the fitting portions 4 are fitted to the lower edge portions 31 of the backrest 3 corresponding to the fitting portions 4. By providing the coupling portion 6 to be engaged and forming a gap SP between the rear edge portion 21 of the seat 2 and the lower edge portion 31 of the backrest 3 therebetween, the chair 100 is stacked (stacking) or the like. The grip part at the time of moving can be recognized clearly, and the design property can be improved.

  The present invention is not limited to the above embodiment.

  In the above embodiment, the engagement convex portion 42 is provided on the fitting portion 4 provided on the seat 2 and the engagement concave portion 62 is provided on the coupling portion 6 provided on the backrest 3. 4 may be provided with an engaging concave portion, and the coupling portion 6 may be provided with an engaging convex portion.

  Further, the size and shape of the fitting part 4 and the coupling part 6 are not particularly limited, but between the central part 21 c of the rear edge part 21 of the seat 2 and the central part 31 c of the lower edge part 31 of the backrest 3. In the above, the above-described gap SP for gripping is formed, and the gap SP can be clearly recognized as being for gripping.

  In addition, in the above embodiment, the mesh has been described as the surface forming member. However, in cooperation with the frame, any material may be used as long as it exhibits an appropriate elasticity during use and exhibits a function equivalent to that of the cushion material. A woven fabric woven with synthetic resin fibers can also be used.

  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 perspective view of the embodiment of the present invention. The perspective view seen from the back before attaching the backrest of the embodiment. The perspective view which expands and shows the principal part of the seat of the embodiment. The perspective view which looked at the backrest of the embodiment from back lower direction. The perspective view which expands and shows the principal part of the backrest of the embodiment. The end view seen from the back in the state which separated the seat and backrest of the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support structure 2 ... Seat 3 ... Backrest 4 ... Mating part 6 ... Joint part 12 ... Standing part 21 ... Rear edge part 41 ... Through-hole 61 ... Insertion hole

Claims (5)

A support structure, a seat supported by the support structure, and a backrest that is supported by an upright portion of the support structure that stands individually at the rear edge of the seat and that stands at the rear edge of the seat. There,
The seat includes a fitting portion that disperses a load applied to the upright portion of the support structure;
The backrest has an insertion hole into which each of the upright portions of the support structure is inserted, and the upright portion of the support structure is inserted into each of the insertion holes and engaged with the fitting portion so that the backrest is integrally fitted. A chair provided with a coupling portion that disperses the load in cooperation with a mating portion.   The fitting portion is provided at the left and right end portions of the rear edge portion of the seat, and has an engagement convex portion that is elongated in a direction close to the end portion, and the coupling portion opens the insertion hole. The chair according to claim 1, further comprising an engagement recess that surrounds and engages with the engagement protrusion, and a surface near the engagement protrusion and the engagement recess is substantially flush with each other.   The chair according to claim 2, wherein the seat has a through hole that is provided at a position separated from the rear edge portion thereof and through which each of the upright portions of the support structure passes, and the engaging convex portion surrounds the opening of the through hole.   The seat and the backrest are each composed of a frame and a surface forming member stretched on the frame, and the fitting portion is provided on the frame of the seat, and the coupling portion is provided on the frame of the backrest. Chair.   The chair according to claim 4, wherein the surface molding member is a mesh-like woven fabric.

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