JP2005103047A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy chair such as a pipe chair to be stacked, excellent in the air permeability while keeping the excellent support of a back of a seated person, and permitting easily detaching and washing a backrest if stained, replacing the backrest to another one, and reducing the weight of the chair. <P>SOLUTION: A pair of left and right backrest rods 13 standing in the rear of a seat part 3 are detachably sheathed with a backrest seat body 17 formed in the shape of a bag with air-permeable base materials 18 and 19 to make the backrest 4 of the chair. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention relates to a chair, and more particularly to a chair from which a backrest seat can be removed.

  Conventionally, a metal pipe or a metal rod is bent and welded to attach a seat plate and a backrest plate to a frame body having four leg rods, a seat support portion and a back support portion. In addition, various chairs that can be stacked are provided.

  Here, since the seat plate and the back plate are required to have high strength in order to reliably support the seated person, conventionally, a cushion body made of foam is laminated on the surface side of the plywood or metal plate, and the surface The thing of the structure covered with leather or cloth was used. However, the seat plate and the backrest plate having such a structure have a drawback that they are heavy and bulky, and further, there is a problem that the back is stuffy because of poor air permeability. Furthermore, even if the seat plate or the backrest plate is dirty, it cannot be easily removed and washed or replaced.

  As an improvement measure, in Patent Document 1, a seat plate and a backrest plate are bent at a central portion of a synthetic resin substrate to form a seat portion and a backrest portion. Attach it to reduce weight and reduce bulkiness. However, this structure does not improve the point that the back is stuffy.

Patent Document 2 also provides a chair having a structure in which a pair of back struts are raised at the left and right rear portions of the frame body, and downward cylindrical portions formed on both sides of the backrest plate are fitted to both back struts. The backrest plate is not detachable, and the backrest plate is provided with a cushion on the front surface of the backrest having a rigid structure, and there remains a problem in terms of air permeability.
JP 2001-37574 A JP 2002-136380 A

  In view of the above situation, the present invention intends to solve the problem that the stackable simple chair such as a pipe chair can be easily removed and washed when the backrest portion becomes dirty. The object of the present invention is to provide a chair that can be exchanged for an object and that is excellent in breathability and can be reduced in weight while maintaining good support on the back.

  In order to solve the above-mentioned problems, the present invention provides a backrest sheet body formed in a bag shape with a breathable base material on a pair of left and right backrests raised at the rear part of a seat so as to be removable. A chair as a drooping part was constructed (claim 1).

  Here, the backrest sheet body has a bag shape with the upper edge closed and provided with open portions on both sides of the lower part, and the pair of left and right backrests has upper ends as free ends. The backrest sheet body is externally mounted on the upper end of the heel from both open portions, and the backrest sheet body is stretched in the left-right direction using the elastic force of both backrest heels, It is preferable that the locking tool locked to the edge is detachably locked by applying tension to the rear seat receiving rod of the seat portion, and the backrest sheet body is stretched up and down (Claim 2). ).

  Moreover, it is also preferable that the lower end of the arch ridge that is curved upward is fixed to the lower part of the back folds on the back side of the back fold, and a space is provided between the back fold and the arch ridge. (Claim 3).

  Further, it is more preferable that the breathable base material forming the backrest sheet body is stretched with a space in the front and rear direction in a state where the backrest sheet body is externally mounted on the both backrests. ).

  The chair of the invention according to claim 1 as described above is formed in a bag shape with a breathable base material and is packaged in a pair of left and right dorsal fins. Since the back does not stuffy and the backrest sheet body is detachable, it can be easily removed and washed, or replaced with another color or material.

  According to the second aspect, the work of mounting the backrest sheet body on both backrests is easy, and the backrest sheet body can be held with tension in the left-right direction and the up-down direction. It will be excellent.

  According to the third aspect, clothes such as a jacket can be hung on the arch bag, a hanging strap of a bag can be hung, and a handbag, a file, etc. are carried in the space between the backrest bag and the arch bag. It is possible to store a relatively flat article. In addition, since the lower end of the arch ridge is fixed to the lower part of the backrest ridge, the elasticity of the backrest ridge can be increased without losing the elasticity of the left and right ridge ridges. The structural strength due to the connection with the scissors can be increased.

  According to claim 4, among the breathable substrates before and after forming the backrest sheet body, the breathable substrate on the front surface side is the first cushion body, and the breathable substrate on the rear surface side is the second cushion body. And since it is bag-like, the front and back breathable substrates exert tension on each other and support the back in a balanced state. That is, when the first cushion body is lightly leaned on the back, the first cushion body is bent backward and tension is applied to the second cushion body, so that the back can be supported softly. Since the second cushion body overlaps and both of them are bent rearward and a resistance force of approximately twice acts, the back can be firmly supported.

  Next, the present invention will be described in detail with reference to the accompanying drawings. 1 to 5 show a chair according to the present invention, FIG. 6 is an exploded perspective view of a backrest portion of the chair, FIG. 7 shows a longitudinal sectional view of the chair, reference numeral 1 is a frame body, and 2 is a leg portion Reference numeral 3 denotes a seat part, and 4 denotes a backrest part.

  The frame body 1 is mainly configured by bending and welding a steel pipe. The frame body 1 includes a pair of left and right front support members 5 and 5 that are L-shaped in side view, and a pair of left and right rear support members 6 and 6 that are welded and raised to the rear ends of the front support members 5 and 5. And front and rear seat receiving rods 7 and 8 provided between the front support members 5 and 5 and an arch rod 9 provided in the middle of the rear support members 6 and 6.

  The front support member 5 is formed by bending a seat support rod 11 extending rearward from the upper end portion of the substantially vertical front leg rod 10. The rear support member 6 is formed by extending a backrest ridge 13 upward from a substantially vertical rear leg ridge 12, and the backrest ridge 13 curves backward as it goes upward and slightly curves outward. It has a shape. Then, the rear end of the seat support rod 11 of the front support member 5 is welded to the middle portion of the rear support member 6, that is, the boundary between the rear leg rod 12 and the backrest rod 13, and they are spaced apart from each other on the left and right. The front seat receiving rod 7 and the rear seat receiving rod 8 are welded to the front and rear portions between the seat supporting rods 11 on both sides. Further, the lower ends of the arch ridges 9 curved upward are respectively welded and fixed to the lower portions of the back ridges 13 and 13 of the rear support members 6 and 6, and the space between the back ridge 13 and the arch ridges 9 is fixed. Is provided.

  Here, the pair of left and right backrest ridges 13, 13 has a free end at the top, and has elasticity in the left-right direction. Further, since the arch ridge 9 is fixed to the lower part of the backrest ridges 13, 13, the amount of deformation of the arch ridge 9 is small even when the backrest ridges 13, 13 are elastically deformed in the left-right direction, and Since the arch ridge 9 is curved upward, it does not hinder the elasticity of the backrest ridges 13, 13 in the left-right direction, and conversely plays a role in increasing the elastic force of the backrest ridges 13, 13. I'm buying. The arch bag 9 can be hung with clothes such as a jacket, or a hanging strap of a bag, and can be carried in a space between the backrest bags 13 and 13 and the arch bag 9 A relatively flat article such as a file can be stored. The arch bar 9 can also be used as a handle when the chair is moved or carried.

  The seat portion 3 is configured by screwing a seat plate 15 to the front seat receiving rod 7 and the rear seat receiving rod 8 via spacers 14. The seat plate 15 has a normal structure, and a cushion body is laminated on the surface of the plywood, and the surface and the periphery thereof are detachably covered with an exterior sheet in which the periphery of the cloth is squeezed with an elastic string. Here, the foam 16 made of polyethylene is made of a double-sided adhesive or the like so as to partially protrude downward into a rectangular recess surrounded by the front seat receiver 7, the rear seat receiver 8, and the front and rear seat receivers 7, 8. It is installed. When the chair is stacked, the foam 16 is placed on the seat plate 15 of the lower chair, and the seat support rod 11 or the seat receiving rods 7 and 8 are in direct contact with the seat plate 15 of the lower chair. It is provided to prevent the seat plate 15 from being damaged or causing a dent.

  Further, the backrest portion 4 is externally attached to a pair of left and right backrest ridges 13 and 13 raised at the rear portion of the seat portion 3 so that a backrest sheet body 17 formed of a breathable base material in a bag shape can be attached and detached. Configured. Here, the breathable base material needs to be formed of a material having high tensile strength, and in this embodiment, a net made of polyamide fiber or a cloth made of polyester fiber is used. The backrest sheet body 17 is formed in a bag shape by stitching around the breathable base materials 18 and 19 having substantially the same shape.

  More specifically, the backrest sheet body 17 is provided with closed upper edges of the breathable substrates 18 and 19 on the front and back sides, and provided with opening portions 20 and 20 on both sides of the lower portion, and a central opening portion at the center portion of the lower edge. 21 is a bag-like shape. Then, the backrest sheet body 17 is externally attached to the upper end portions of the backrest ridges 13 and 13 from both open portions 20 and 20, and the backrest sheet body 17 is utilized by utilizing the elastic force of both the backrest ridges 13 and 13. Is attached to the lower edge of the backrest sheet body 17 so that the rear seat receiving rod 8 of the seat portion 3 is tensioned and detachably locked. The backrest sheet body 17 is stretched up and down.

  The locking tool 22 is formed by bending a metal rod. A handle 23 is formed in the center, locking parts 24, 24 are formed on both sides thereof, and end portions of the locking parts 24, 24 are formed. Are formed with hook portions 25, 25 which are engaged with the rear seat receiving rod 8. The locking tool 22 is inserted from one open part 20 of the backrest sheet body 17 so that the handle part 23 faces the central open part 21 and the hook parts 25 and 25 at both ends are connected to both open parts 20 and 20. The hook portions 25 and 25 are locked to the rear seat receiving rod 8 while strongly pulling the handle portion 23 and applying a strong tension to the backrest sheet body 17 in the exposed state. When removing the backrest sheet body 17, the handle portion 23 is pulled and removed from the rear seat receiving rod 8 in order from one hook portion 25, and then pulled upward to form both backrest ridges 13, 13. Just pull out from.

  Here, notches 26 and 26 are formed at the corners of the foam 16 corresponding to the end portions of the rear seat catches 8 for locking the hook portions 25 and 25, and the hook portions 25 and 25 are It can be accommodated. The locking member 22 is formed of spring steel, and the backrest sheet body 17 is always moved up and down by the elastic force of the material of the locking member 22 or the elastic force of a spring portion such as a coil spring formed in part. It is also preferable to apply tension in the direction.

  And the backrest part 4 configured in this way has the breathable base material 18 on the front side among the breathable base materials 18 and 19 before and after forming the backrest sheet body 17 serving as the first cushion body, and the rear surface. The air permeable base material 19 on the side becomes the second cushion body. Here, since the backrest sheet body 17 has a bag shape, the front and back breathable base materials 18 and 19 apply tension to each other to support the back in a balanced state. That is, when the back cushion sheet body 17 is first lightly turned, the first cushion body (breathable base material 18) bends backward while applying tension to the second cushion body (breathable base material 19), so that the back is softly supported. Further, when it is further drowned, the first cushion body and the second cushion body are overlapped, and both of them are bent backward and a resistance force of about twice acts, so that the back can be firmly supported. Thus, since the backrest part 4 of the chair of the present invention is configured using the bag-like backrest sheet body 17 stretched by applying tension to the left and right and up and down, the backrest 4 is elastic in two stages in the front-rear direction. Since the back can be supported, it is possible to realize an unprecedented sitting comfort while suppressing the stuffiness of the back.

  In the present embodiment, the upper ends of the backrest ridges 13 and 13 are free ends. However, when the upper ends of the backrest ridges 13 and 13 are connected by a connecting ridge, What is necessary is just to employ | adopt the structure which opens an edge completely and hooks the breathable base material of the front and back, respectively, maintaining the tension | tensile_strength in the appropriate position of a seat part with a latching tool. However, since the top and bottom of the backrest ridges 13 and 13 cannot be elastic in the left-right direction by themselves, it is possible to add a mechanism for always attracting the breathable base material on the rear surface side to the central portion side with a strong force. is necessary. In addition, the connecting rod must have a slightly curved shape to the rear in order to allow the backrest sheet body 17 to bend backward.

1 is an overall perspective view of a chair according to the present invention. It is a side view of a chair similarly. It is a top view of a chair similarly. It is a front view of a chair similarly. It is a bottom view of a chair similarly. It is a disassembled perspective view of the backrest part of a chair. It is a longitudinal cross-sectional view of a chair.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Frame body 2 Leg part 3 Seat part 4 Backrest part 5 Front support member 6 Rear support member 7 Front seat receiver 8 Rear seat receiver 9 Arch collar 10 Front leg collar 11 Seat support collar 12 Rear leg collar 13 Backrest collar 14 Spacer 15 Seat plate 16 Foam 17 Backrest sheet 18 Breathable base material 19 Breathable base material 20 Opening portion 21 Center opening portion 22 Locking tool 23 Handle portion 24 Locking portion 25 Hook portion 26 Notch

Claims (4)

  A chair comprising a pair of left and right backrests raised at the rear part of a seat part, and a backrest sheet body formed in a bag shape with a breathable base material is detachably mounted to form a backrest part.   The backrest sheet body has a bag shape with the upper edge closed and open portions on both sides of the lower part, and the pair of left and right backrests has a free upper end, and the upper ends of both backrests The backrest sheet body is sheathed from both open portions, and the backrest sheet body is stretched in the left-right direction using the elastic force of both backrest heels, and is engaged with the lower edge of the backrest sheet body. The chair according to claim 1, wherein the stopped locking member is detachably locked by applying a tension to a rear seat receiving rod of the seat portion, and the backrest sheet body is stretched up and down.   The lower end of the arch ridge that is curved upward is fixed to the lower part of both back ridges on the back side of the back ridge, and a space is provided between the back ridge and the arch ridge. The listed chair.   The breathable base material which forms this backrest sheet | seat body in the state which coat | covered the backrest sheet | seat body in the said both backrest heels, and is tensioned and provided in the front-back direction. Chair.

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