JP2006094995A - Chair - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simplified chair such as a pipe chair which is breathable and can easily dismantle and wash a backrest section when it gets filthy or replace it with other backrest, maintain good back support, and reduce weight. <P>SOLUTION: This chair is composed of a pair of backrest rods 13 on right and left sides between which distance is extended upwards, an approximately rectangular backrest sheet body 18 which at least the edge sections on both sides and the lower edge section are pouched, the pouched section on the side edge 20 and the pouched section on the lower edge 21 are internally connected with each other, and an insertion slot 22 is formed on the bottom edge of the pouched section on the side edge, and a backrest connecting rod 14 which is connected across the bottom sections of the backrest rods in a detachable manner. A backrest section 4 is formed by inserting the backrest rods from the insertion slot of the backrest sheet body, in the state the backrest connecting rod is inserted in the pouched section on the side edge of the backrest sheet body, while applying tension to each of the pouched sections on the side edge on both sides and then connecting the backrest connecting rod across the bottom sections of the backrest rods. <P>COPYRIGHT: (C)2006,JPO&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.

  Patent Document 1 discloses a stacking chair in which a seat plate and a backrest plate are attached to a frame having a structure that can be stacked in the front-rear direction, and a recumbent bridge is provided between the rear portions of the frame. The lower surface of the seat plate is pivotally supported at the center of the left and right so that the seat plate can be pivoted up and down. The seat plate is supported on both sides of the front portion of the frame while the seat plate is substantially horizontal. A stacking chair is disclosed that can be stacked in the front-rear direction in a state where the chair is raised along the backrest plate.

Further, in Patent Document 2, a seat plate is configured such that elastically deformable nets are stretched on a frame having at least left and right side portions and a front end portion, and a part of the nets along the front-rear direction. Alternatively, a chair is disclosed in which a plurality of portions have a relatively high elastic force compared to other portions and are formed in a highly elastic portion that extends across the entire left and right widths of the nets. The nets are composed of a woven fabric or a knitted fabric in which a weft group extending in the left-right direction and a warp group extending in the front-rear direction (or up-down direction) are entangled in a front view, and a high elastic yarn is used as the warp group. In addition, a highly elastic portion extending across the entire width of the nets is formed by increasing the density of the weft group, increasing the cross-sectional area of the yarn, or using a material having high strength.
JP 2000-50995 A JP 2004-33542 A

  In view of the above situation, the present invention intends to solve a simple chair such as a pipe chair, which can be easily removed and washed when the backrest is dirty, or replaced with another one. It is another object of the present invention to provide a chair that can be reduced in weight while maintaining good support on the back while maintaining excellent ventilation.

  In order to solve the above-mentioned problem, the present invention has a pair of left and right backrests raised at the rear part of the seat part, and at least both side edge parts and lower edge parts are bag-like, and the lower end of the side edge bag-like part. A substantially rectangular backrest sheet body made of a knitted fabric or a woven fabric in which an insertion port is formed by opening the lower end of the side edge bag-shaped portion downward and the both ends of the bag portion and the lower edge bag-shaped portion communicate with each other inside And a back connection rod that is detachably connected between the lower portions of the backrest ridges, and the backrest ridges are inserted into the lower edge bag-like portion of the backrest sheet body. Are inserted from the insertion opening of the backrest sheet body while applying tension to the side edge bag-shaped portions on both sides, and then the chair is used as a backrest portion by connecting the back connection rod between the lower portions of both backrest rods. (Claim 1).

  Here, the back connecting rod has an arch shape curved rearward, and is formed by forming screw holes at both ends for screwing screws passed through through holes formed through the lower portions of the two backrest rods. Preferred (claim 2).

  Further, it is more preferable that the two backrest ridges have a shape in which the interval increases toward the upper side and the inclination angle toward the rear gradually increases (Claim 3).

  Furthermore, it is more preferable that heat is applied to the fused yarn knitted on the upper edge of the backrest sheet body to harden the upper edge of the backrest sheet body to form a high tension portion. ).

  The backrest sheet body is knitted as a bag, the front and back portions are partially integrated to form the side edge bag-like portion, the knitting end of the lower edge is sewn and closed while weaving the fusion yarn, It is also preferable that a lower edge bag-like portion is formed and the fused yarn is heated to be solidified (Claim 5).

  In the chair according to the first aspect of the present invention, the back connection heel is inserted into the lower edge bag-like portion of the backrest sheet body, and the backrest ridges are placed on both side edge bag-like portions of the backrest sheet body. After inserting the backrest, the backrest can be easily constructed by simply connecting the back connection collar between the lower parts of both backrests, and the upper part of the backrest is inserted into the side edge bag-shaped part. Since the connecting heel is inserted into the lower edge bag-like part, the heel member is completely invisible at the backrest part and has excellent appearance, and the lower edge part of the backrest sheet body is inserted into the lower edge bag-like part. The shape is stabilized because it is fixed in a state where tension is applied by the back connecting rod. Furthermore, since the backrest sheet body is formed from a knitted fabric or a woven fabric, excellent breathability and a feeling of fitting to the back can be obtained. Further, since the backrest sheet body is detachable from the backrest heel, it can be easily removed and washed, or replaced with another color or material.

  According to the second aspect, in the state where the back connecting rod is screwed and connected to both the backrest rods, the connecting portion is hidden by the backrest sheet body, so that the appearance is not impaired, and the back connecting rod is bent backward. Since the seat has a arch shape, the waist of the seated person can be escaped, and the backrest sheet body can be held with tension applied to the three-dimensional curved surface shape, so that the cushioning property is also excellent.

  According to the third aspect of the present invention, the two backrest heels have a shape in which the interval increases toward the upper side and the inclination angle toward the rear gradually increases, so that the backrest seat body is tensioned by the two backrest heels. It can be stretched, and the backrest seat body is more tensioned upward, and the backrest seat body can be fitted along the curved surface from the waist of the seated person to the back, making it very comfortable to sit on It will be.

  According to the fourth aspect of the present invention, it is possible to form the high tension portion by solidifying the upper edge of the backrest sheet body simply by applying heat to the fusion yarn knitted on the upper edge of the backrest sheet body. A good tension state can be obtained by preventing the sheet body from slacking downward.

  According to claim 5, the entire backrest sheet body is knitted into a bag, and the front and back portions are partially integrated to form a side edge bag-like portion. And lower the manufacturing cost, and sew the knitting end of the lower edge and close it while weaving the fusion yarn to form a lower edge bag-like portion, and heat the fusion yarn to solidify it. Therefore, fraying of the knitting end can be prevented.

  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. As shown in FIGS. 1 to 5 and 7, the frame body 1 has a structure that can be stacked in the front-rear direction. In the present embodiment, a circular steel pipe having a relatively large cross section is bent. A pair of left and right front support members 5, 5 and rear support members 6, 6 and a rear connecting rod 7 formed by bending a small-diameter solid steel rod; a pair of left and right support rods 8, 8; The rear connecting rod 7 is connected by welding between the rear ends of a pair of left and right arch-shaped front supporting members 5 and 5 which are formed of a horizontal bar 9 and curved forward. The rear support members 6 and 6 are welded in a standing state between the ends and in front of the rear connection rod 7, and the support rods 8 and 8 are respectively connected to the front support member 5 and the rear support member 6 on both sides. It is welded across and has a structure in which the horizontal bar 9 is provided between the rear parts of the support bars 8 and 8.

  More specifically, the front support member 5 is a support rod 11 that holds the waist of the seated person on both sides of the seat 3 by curving and extending the upper part of the raised front leg rod 10 backward. The rear support member 6 is formed by extending a backrest ridge 13 upward from the raised rear leg heel 12, and the backrest ridge 13 rises so that the distance increases as it goes upward, and as it goes upward. The rearward inclination angle gradually increases. 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, an arch-shaped back connecting rod 14 curved backward is removably connected to the lower portions of the backrest rods 13 and 13 by screwing.

  The leg portion 2 is constructed by attaching casters 15,... To the lower ends of the front leg rods 10 and 10 and the rear leg rods 12 and 12, respectively. 9, the backrest portion 4 is configured by stretching a backrest seat body 18 with the backrest collars 13 and 13 and the back coupling collar 14. ing. The backrest ridges 13 and 13 are set up substantially in parallel, and the lateral width of the backrest sheet body 18 in an unloaded state is set to be sufficiently narrower than the outer space between the backrest ridges 13 and 13. If it is made, or if it is manufactured in a trapezoidal shape with a narrow width at the top, it can be mounted while applying tension. Further, synthetic resin receivers 19 and 19 attached to the front portions on both sides of the lower surface of the seat plate 16 are placed on the front end portions of the support rods 8 and 8 and supported in a substantially horizontal state. This state is the use state.

  On the other hand, the seat plate 16 is flipped up and held substantially vertically between the support rods 11 and 11, so that a plurality of chairs can be stacked in the front-rear direction in this state. For this purpose, horizontal stacking is possible by narrowing the outer spacing of the rear leg rods 12 and 12 relative to the inner spacing of the front leg rods 10 and 10 and fixing the support rods 8 and 8 to a tilted state where they rise upward. It is said. In this horizontal stacking state, the rear support members 6 and 6 of the front chair enter between the support chairs 8 and 8 of the rear chair. Since the coating may be scratched by rubbing, it is preferable to attach a synthetic resin sheet or a thin molded product along this portion or the inner side surfaces of the support rods 8 and 8.

  Here, as shown in FIGS. 1, 5, and 6, the backrest sheet body 18 has a substantially rectangular shape made of a knitted fabric or a woven fabric, and at least both side edges and a lower edge are bag-shaped, The lower edge portions of the side edge bag-like portions 20 and 20 and the both end portions of the lower edge bag-like portion 21 communicate with each other inside, and the lower end of the side edge bag-like portion 20 is opened downward to form the insertion port 22. Is. The backrest sheet body 18 needs to be formed of a material having high tensile strength. In this embodiment, the backrest sheet body 18 is formed by knitting with polyamide fibers or polyester fibers.

  Further, the backrest sheet body 18 is formed by knitting polyester fusing yarn on the upper edge, and then applying heat to the fusing thread with an iron or the like to fuse the backrest sheet body 18 to harden the upper edge of the backrest sheet body 18. A high tension portion 23 is formed. Specifically, the backrest sheet body 18 is knitted as a bag, the front and back portions are partially integrated to form the side edge bag-like portions 20 and 20, and the lower edge knitting end 24 is sewn. The lower edge bag-like portion 21 is formed by closing the fusion yarn while weaving, and the fusion yarn is heated and solidified to prevent fraying of the sewing portion and to increase the tensile strength of the lower edge.

  Further, as shown in FIG. 5, end face plates 25 are welded to both ends of the back connecting rod 14, and screw holes 26 are formed in the end face plate 25. A through hole 27 is formed through the upper and lower intermediate portions of the rear support members 6, 6, and a screw 28 passed from the side through the through hole 27 is screwed into the screw hole 26 at the end of the back connecting rod 14. It is designed to be detachably connected.

  In order to attach the backrest sheet 18 to the backrest 13, 13, first, the backrest 14 is inserted into the lower edge bag-like portion 21 of the backrest 18, and both backrests are placed. After inserting the flanges 13 and 13 from the insertion ports 22 and 22 of the backrest sheet body 18 while applying tension to the side edge bag-like portions 20 and 20 on both sides, 13, screws 28 inserted through the through holes 27, 27 are screwed into the screw holes 26 at the end of the back connecting rod 14 to be connected. Here, when inserting the backrest ridges 13, 13 into the side edge bag-like portions 20, 20 of the backrest sheet body 18, an external force is applied so as to narrow the tip interval between the backrest ridges 13, 13. It is desirable in terms of work. Since the screw 28 is located in the side edge bag-shaped portion 20, it is completely invisible from the outside.

  Further, the backrest sheet body 18 is manufactured in a substantially rectangular shape, and the distance between the outer ends of the backrest ridges 13 and 13 is sufficiently larger than the lateral width thereof, and the creepage distance on the convex surface side of the back connection ridge 14. Is set to be sufficiently long, the tension increases from the upper and lower central portions to the upper portion, and the tension increases from the lower portion to the lower portion. The backrest sheet body 18 is stretched in a three-dimensional curved surface by the curved shape of the backrest ridges 13 and 13 and the arch shape of the back connecting ridge 14.

  The backrest sheet body 18 is knitted in a bag knitting from the upper edge to the lower edge in a double-sided manner, and knitting yarns constituting the front and back surfaces are formed in an area excluding the upper edge, both side edges, and the lower edge. By forming a plurality of mesh-like portions 29,... That cross each other and extend in the lateral direction, the remaining fabric portion is partitioned by a contour line that connects both ends of the mesh-like portions 29,. Side edge bag-like portions 20, 20 are formed. Further, the lower edge bag-like portion 21 is formed by sewing at the remaining lower edge portion where the mesh-like portion 29 is not formed except for both ends of the knitting end. It becomes.

  Also, instead of forming the mesh portion 29, the front and back fabric surfaces are partially heat-sealed by sandwiching a belt-like fusion sheet between the front and back fabric surfaces sacked entirely and heating with an iron or the like. It is also possible to integrate them. Further, the backrest sheet body 18 can be manufactured by folding a woven fabric in half and sewing three sides.

  Here, there is a difference in tension between the belt-like mesh-like portion 29,... And the fabric portion 30,. In the case of the present embodiment, the fabric portion 30 extends less than the mesh-like portion 29, so that the mesh-like portion 29 becomes a low elastic portion and the fabric portion 30 becomes a high elastic portion. Depending on the way of knitting, the reverse may occur. In the present embodiment, the belt-like high elastic portions and low elastic portions having substantially the same width are alternately provided. However, the backrest sheet body 18 as a whole can be provided by changing the width and interval of the high elastic portions and the low elastic portions. The tension distribution in can be adjusted as appropriate. For example, it is possible to increase the tension of the portion corresponding to the waist.

  Further, by forming the mesh-like portions 29,... In the backrest sheet body 18, when the backrest portion 4 is stretched, the generation of wrinkles can be prevented or the wrinkles can be made inconspicuous. is there.

  Further, the corner portion of the backrest sheet body 18 corresponding to the upper end portions of the backrest ridges 13 and 13 is a portion to which the most force is applied and is rubbed with hands, clothes, etc. Thus, it is also preferable to sew the fabric portion 30 by covering the corner portion with triangular bag-shaped reinforcing members 31, 31.

It is a front view of the chair concerning the present invention. It is a side view of a chair similarly. It is a top view of a chair similarly. It is a center longitudinal section side view of a chair. It is a disassembled perspective view of the principal part. It is an expansion perspective view of a backrest sheet body. It is a side view of the state where a plurality of chairs were horizontally stacked. It is a perspective view of the backrest sheet | seat body which reinforced the upper edge corner part. It is a front view of the chair using the backrest seat body of FIG.

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 Rear connection rod 8 Support rod 9 Horizontal rod 10 Front leg rod 11 Support rod 12 Rear leg rod 13 Backrest rod 14 Back connection rod 15 Caster 16 Seat plate 17 Bearing 18 Backrest sheet body 19 Receiving device 20 Side edge bag-like portion 21 Lower edge bag-like portion 22 Insertion port 23 High tension portion 24 Knitting end 25 End face plate 26 Screw hole 27 Through hole 28 Screw 29 Mesh Shaped part 30 dough part 31 reinforcing member

Claims (5)

  A pair of left and right backrests raised at the rear part of the seat part, and at least both side edge parts and lower edge parts are bag-like, and the lower end part of the side edge bag-like part and both end parts of the lower edge bag-like part are A substantially rectangular backrest sheet body made of a knitted fabric or a woven fabric having an insertion opening formed by opening the lower end of the side edge bag-shaped portion downward, and being attached and detached between the lower portions of the backrest folds. A back connection rod that can be connected to each other, and in a state where the back connection rod is inserted into a lower edge bag-like portion of the backrest sheet body, both backrest ridges are respectively disposed on both sides from the insertion opening of the backrest sheet body. The chair is characterized in that after inserting the side edge bag-like portion with tension, the back connecting rod is connected between the lower portions of the two backrest rods to form a backrest portion.   2. The back connection rod according to claim 1, wherein the back connection rod has an arch shape curved backward, and screw holes are formed at both ends for screwing screws through holes formed through the lower portions of the two backrest rods. Chair.   The chair according to claim 1 or 2, wherein the two backrest heels have a shape in which an interval increases as it goes upward and an inclination angle toward the rear gradually increases.   The heat is applied to the fusion yarn knitted on the upper edge of the backrest sheet body, and the upper edge of the backrest sheet body is hardened to form a high tension portion. Chair. The backrest sheet body is knitted as a bag, the front and back portions are partially integrated to form the side edge bag-like portion, the knitting end of the lower edge is sewn and closed while weaving the fusion yarn, The chair according to any one of claims 1 to 4, wherein the chair is formed by forming a lower edge bag-like portion and applying heat to the fused yarn.

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