JP5165367B2 - Chair - Google Patents

Description

  The present invention relates to a chair, and more particularly, to a chair provided with urging means that urges a seat body from a sideways seated state to a vertical standing state in which a front end faces upward.

A chair provided with a winding spring that urges the seat body from a sitting state to a standing state is known (Patent Document 1).
However, since the coil spring is accommodated in the lower space of the seat body in the seat body in a state where the coil spring is inclined from the horizontal state, the thickness of the entire seat body including the coil spring is large. Thus, there is a problem that the design may not be preferable.
Japanese Utility Model Publication No. 60-44648

  In view of the present situation, the present invention can reduce the thickness of the entire seat body without impairing the function as the urging means of the winding spring, and without apparently increasing the thickness of the entire seat body, An object of the present invention is to provide a chair provided with an urging means for urging the seat body in the direction of standing.

According to the present invention, the above-described problems are solved by the invention having the following configuration, as shown in each of the claims.
(1) A leg body, a seat body pivotally supported on a pivot axis of the leg body from a horizontally seated state to a vertically standing state in which a front end faces upward, and the seat body in an upright state And a biasing means that constantly biases in the direction in which the biasing means is formed with a winding spring having one end fixed to the lower part of the seat and the other end as a free end. In the seated state, it is held horizontally in the front-rear direction, and the free end is connected to the other end of the wire disposed along the circumferential direction of the pivot, with one end fixed to the pivot on which the seat is pivotally supported. The chair is characterized by that.

  (2) In the above paragraph (1), the seat body comprises a seat body and a bearing member fixed to the lower surface of the seat body and pivotally supporting the seat body on the pivot. One end of the winding spring is fixed to the part.

  (3) In the above item (2), a U-shaped pivot bearing portion in a side view is formed on both the left and right sides of the rear portion of the bearing member with a desired spacing, and one end of the winding spring is fixed at the center of the front portion. Forming a section and fixing one end of the wire to the pivot between the left and right pivot bearings, and arranging the other end along the circumferential direction of the pivot, and connecting the other end of the wire to the free end of the winding spring To do.

  (4) In the above paragraph (2) or (3), the seat body includes a seat body, a bearing member, and a seat lower surface cover, and the seat lower surface cover, the lower surface of the seat body, the bearing member, Cover from below.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the winding spring having one end fixed to the lower portion of the seat body is held sideways in the front-rear direction, the free end is fixed to the pivot, and one end is fixed along the circumferential direction of the pivot. Since it is connected to the other end of the arranged wire, the space length in the vertical direction occupied by the winding spring is compared with the chair disclosed in Patent Document 1 in which the winding spring is inclined and the free end side is fixed to the pivot. Accordingly, the thickness of the entire seat including the winding spring can be reduced, and the appearance of the winding spring that urges the seat in the standing state without seemingly increasing the thickness of the entire seat body. A chair that does not impair the function as the biasing means is obtained.

  According to the second aspect of the present invention, since the seat body can be pivotally supported on the pivot shaft and the winding spring can be fixed by a single member called a bearing member, the processing applied to the lower surface of the seat body in the seat body. Can be minimized.

  According to the invention of claim 3, the wire is fixed to one end of the pivot, the wire is arranged along the circumferential direction of the shaft, and the other end of the wire is fixed to the free end of the winding spring. A series of operations such as linking with can be performed very efficiently.

  According to the fourth aspect of the present invention, the bearing member, the wire attached using the bearing member, the winding spring, and the like are covered with the seat lower surface cover, so that the aesthetic appearance is not impaired.

Hereinafter, the present invention will be described in detail based on examples.
FIG. 1 is a perspective view of a chair embodying the present invention when the seat body is turned upright, FIG. 2 is an exploded perspective view of the chair shown in FIG. 1, and FIG. FIG. 4 is a front view of the seat underside cover removed, FIG. 5 is a central longitudinal sectional view of the seat body in a standing state, and FIG. 6 is a seat body in a seated state. FIG. 7 is a central longitudinal sectional view of the seat body, FIG. 8 is a front view of the main part showing a state in which the backrest frame is covered with the upholstery frame, and FIG. 9 is an upper perspective view of the seat lower surface cover. It is.

As shown in FIGS. 1 and 2, in the chair of the present invention, a backrest frame 2 is erected on the rear portion of the leg 1. The leg body 1 is formed by connecting the upper ends of left and right side legs 3, 3 having an inverted V shape by a pivot 4 that faces in the left-right direction.
On the upper left and right of the leg 1, elbow supports 5 are attached by screws 6 and fixing aids 7.

  The backrest frame 2 has a frame shape, and attachment portions 8 facing forward are provided at the lower portions of the left and right frame members 2a and 2a, respectively, and the backrest frame 2 is attached to the leg body 1 through the attachment portions 8. Installed.

  The backrest frame 2 is covered with an elastic tension member 9 made of synthetic resin or the like.

  As shown in FIGS. 2 and 8, the upholstery material 9 is formed in a bag shape having an opening 9a below, and the upholstery material 9 is covered on the backrest frame 2 from above using the opening 9a.

  Mounting brackets 10 are respectively fixed to the lower portions of the left and right frame members 2a and 2a in the backrest frame 2, and the mounting bracket 10 includes a mounting piece 10a extending inward.

  The left and right lower corners of the plate material 11 made of a substantially rectangular hard elastic body in a front view are fixed to the mounting piece 10a by screws 12, and elastically deformed backward by a load from the front by a seated person. It has become possible.

  The plate member 11 is made of polypropylene resin, and in order to give a good pressing force to the occupant's lower back, in the side view, it has a forward-shaped shape, and a rearward load on the central portion in the left-right direction. On the other hand, in order to bend the seat occupant from the left and right, it is formed in a gentle arc shape that protrudes rearward in plan view.

  The plate member 11 is located between the left and right frame members 2 a and 2 a in the backrest frame 2 and in a space between the front surface 9 b and the rear surface 9 c of the upholstery material 9.

  The plate member 11 has a lumbar support function and a function as a protection plate against an impact from the rear.

  In order to fully exert the lumbar support function, a part of the plate member 11, particularly the lower part thereof, is fixed by fixing the left and right lower corners of the plate member 11 made of a hard elastic body with screws 12 or the like as in this embodiment. It is desirable that the portion of the plate member 11 that is fixed to the backrest frame 2 and that corresponds to the waist of the seated person can be elastically deformed appropriately rearward by a load from the front. In this case, the width of the plate member 11 in the left-right direction is not necessarily the same as the interval between the left and right frame members 2a, 2a in the backrest frame 2, and may be somewhat narrow.

  Further, the length of the plate member 11 in the vertical direction needs to be large enough to reach at least a position corresponding to the forward bent portion of the frame member 2a that supports the waist from the lower end in the space between the left and right frame members 2a and 2a. If the length is higher than this, the function as a protective plate is enhanced.

  Further, in order to sufficiently exert the function as a protective plate against an impact from the rear, the width in the left-right direction of the plate member 11 is made substantially the same as the interval between the left and right frame members 2a, 2a in the backrest frame 2. It is desirable that the plate material is made of a material having impact resistance against kicking of the foot and the like, and absorbs the impact to make the impact on the seated person as small as possible.

  Further, the length of the plate member 11 in the vertical direction is higher from the lower end in the space between the left and right frame members 2a and 2a than the position corresponding to the forward bent portion of the frame member 2a that supports the waist. It is desired that the size reaches a high position.

  In order to improve impact resistance and reduce the impact on the seated person as much as possible, a plate material made of a somewhat rigid elastic body is selected, and for example, a reinforcing rib is provided on the plate material or the back of the plate material is Fix the frame to two places on the left and right sides, and fix the upper part using elastic fixing means, for example, using elastic strips, or using bag-like upholstery. Is desirable.

  The lower opening 9a of the upholstery material 9 has cutout portions 9d cut out upward on the left and right sides, and attachment portions for attaching the backrest frame 2 to the leg body 1 through the cutout portions 9d. 8 extends forward.

  The opening 9a of the upholstery material 9 is closed by a closing means such as a string below the lower frame material 2b of the backrest frame 2, so that the upholstery material 9 is not displaced from the backrest frame 2 by shifting upward. Yes.

  The upholstery material 9 is formed as a net and is elastically extended backward by a load from the front by the seated person.

  The upholstery material 9 may be a single piece instead of a bag. In this case, the back frame 2 is covered with a tension material on the front side, and the plate material 11 is provided between the left and right frame materials 2a and 2a in the back frame 2 and in the rear space of the tension material. Become.

  The seat 13 is pivotally supported by the pivot 4 of the leg 1 so as to be rotatable from a vertically standing state in which the front end 14a shown in FIG. 5 faces upward to a horizontally seated state shown in FIG.

  As shown in FIGS. 2 and 3, the seat body 13 includes a seat body 14, a bearing member 15 that is fixed to the lower surface of the seat body 14, and pivotally supports the seat body 14 on the pivot 4, and the seat body 14. And a seat lower surface cover 16 that covers the lower surface and the bearing member 15.

  The seat main body 14 has a substantially rectangular shape in a plan view in the seated state, and has a slightly narrow rear side.

  The bearing member 15 has two parallel front-and-rear directions that are suspended in the center in the left-right direction on the lower plate of the upper plate 15a and the lower plate of the upper plate 15a. Are formed by U-shaped pivot bearing portions 15c and 15c provided on the left and right sides outside the hanging pieces 15b and 15b at the rear portion of the upper plate 15a. The left and right pivot bearing portions 15c, 15c are formed so as to be spaced apart from each other by approximately the same interval as the two parallel hanging pieces 15b, 15b.

  The hanging piece 15b is notched in a U-shape at the portion where the pivot bearing portion 15c is located, and receives the pivot 4 by the left and right pivot bearing portions 15c and 15c and the notched portion 15d of the hanging pieces 15b and 15b. A receiving groove in the left-right direction is formed.

  As shown in FIGS. 2 and 9, the seat lower surface cover 16 has a substantially square shape in a plan view in the seated state, and the bottom plate 16a has an arcuate shape that protrudes downward in the front view, and the rear portion of the bottom plate 16a. A groove portion 16b having a U-shape in a side view for avoiding interference with the pivot bearing portion 15c in the bearing member 15 is formed.

The seat 13 is assembled to the pivot 4 as follows.
As shown in FIG. 3, the bearing 17 (see FIG. 2) is fitted to the pivot 4, and the pivot bearing portion 15 c of the bearing member 15 is fitted to the pivot 4 from below. At this time, the bearing member 15 is positioned by the positioning member 18 (see FIG. 2) that is welded to the pivot 4 in advance. Next, the seat body 14 is applied to the pivot 4 from above, and the bearing member 15 is fixed to the seat body 14 with screws 19 from below.

  Next, as shown in FIG. 2 to FIG. 4 and FIG. 7, the two wires 20, 20 are respectively connected between the two hanging pieces 15 b, 15 b of the bearing member 15 with one end 20 a on the pivot 4 by a screw 21. It fixes and arrange | positions along the circumferential direction of the pivot 4, and the other end 20b is located ahead.

  Next, a locking pin 22 is installed between the front portions of the left and right hanging pieces 15b, 15b, and one end 23a of each of the two winding springs 23, 23 is fixed to the locking pin 22 as the fixing portion. The free end of the other end 23 b is connected to the other end 20 b of the wire 20.

  Next, the stopper receiver 24 is fixed to the installation piece 15e installed between the rear portions of the left and right hanging pieces 15b, 15b with screws 25. The stopper receiver 24 comes into contact with a stopper 26 welded to the pivot 4 when the seat 13 is rotated around the pivot 4 from the sitting state shown in FIG. 6 to the standing state shown in FIG. The rotation of the seat 13 is restricted.

  Next, the seat lower surface cover 16 is attached to the seat body 14 with screws 27 from below to cover the lower surface of the seat body 14 and the bearing member 15.

  As described above, as shown in FIG. 7, the urging means is formed by the winding spring 23 having one end 23 a fixed to the lower portion of the seat body 13 and the other end 23 b being a free end. In the seating state, and the free end 23b is arranged along the circumferential direction of the pivot 4 with the one end 20a fixed to the pivot 4 on which the seat 13 is pivoted. By connecting to the other end 20b of the wire 20, the chair which always urges | biases the seat body 13 in the direction which becomes a standing state is obtained.

  Since the seat body 13 is constantly urged in the standing direction as described above, the seat body 13 is in the standing state as shown in FIG. 5 when not in use, and the seated person uses his / her hand during use. Thus, the seat 13 is rotated around the pivot 4 against the urging force of the winding spring 23 to be in a seated state as shown in FIG. After use, when the seated person moves away from the seat body 13, the seat spring 13 automatically returns to the standing state by the urging force of the winding spring 23.

  If necessary, a mechanism for maintaining the seated state may be incorporated so that the mechanism automatically returns to the standing state after the mechanism is released.

  Further, the urging force of the winding spring 23 is reduced so that it does not automatically return to the standing state, but the force required for the person to return to the standing state may be reduced.

  As shown in FIGS. 1 and 9, the seat lower surface cover 16 has a rear lower surface formed in an arcuate shape protruding downward in a rear view, and the lower surface is formed in an arcuate rear portion in FIG. In the standing state of the seat body 13 shown, a groove portion 28 opening downward and rearward is provided, and a first handle portion 29 is formed at the rear end of the groove portion 28.

  As shown in FIGS. 1, 7, and 9, the lower surface front portion of the seat lower surface cover 16 is provided with a protruding portion 30 that protrudes downward, and gradually rises backward from a portion 30 a that protrudes most downward. It is formed as follows. On the lower surface that gradually rises, a concave portion as the second handle portion 31 is provided so as to open forward and downward in the standing state of the seat body 13 shown in FIG.

  The first handle portion 29 is used as a handle portion when the seat body 13 carries the chair in the standing state, and the second handle portion 31 is used when the seat body 13 in the standing state is brought into the sitting state. Used as a handle.

  In this embodiment, the first handle 29 and the second handle 31 are provided on the seat lower surface cover 16 which is one member constituting the seat body 13, but the seat lower surface cover 16 is not used. For example, a double-handed portion may be provided on the seat body 14.

  In general, the rear portion of the seat body 13 is provided with a first handle portion that opens at least downward in the standing state, and the lower surface front portion of the seat body 13 protrudes downward. What is necessary is just to provide the 2nd handle part opened to the front lower direction in the standing state of a seat.

It is a perspective view when the chair which implemented this invention is rotated to a standing state. It is a disassembled perspective view of the chair shown in FIG. It is a principal part expansion disassembled perspective view of a chair similarly. It is a front view of the state which removed the seat lower surface cover of the chair. It is a center longitudinal cross-sectional view when the seat body of a chair is made into the standing state. It is a center longitudinal cross-sectional view when the seat body of a chair is made into the seating state. It is a center longitudinal cross-sectional view of the seat body of a chair. It is a principal part front view which shows the state which coat | covers a tension material on a backrest frame. It is an upper perspective view of a seat lower surface cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Leg 2 Back frame 2a Left and right frame material 2b Lower frame material 3 Side leg 4 Axis 5 Elbow support 6 Screw 7 Fixing fixture 8 Mounting part 9 Tension material 9a Opening 9b Front surface 9c Rear surface 9d Notch part 10 Mounting bracket 10a Installation Piece 11 Plate material 12 Screw 13 Seat 14 Seat body 14a Front end 15 Bearing member 15a Upper plate 15b Hanging piece 15c Pivot bearing portion 15d Notch portion 15e Installation piece 16 Seat lower surface cover 16a Bottom plate 16b Groove portion 17 Bearing 18 Positioning member 19 Screw 20 Wire 20a One end 20b The other end 21 Screw 22 Locking pin 23 Winding spring 23a One end 23b The other end (free end)
24 Stopper receptacle 25 Screw 26 Stopper 27 Screw 28 Groove 29 First handle 30 Projection 30a Most projecting part 31 Second handle

Claims (4)

A leg body, a pivot body of the leg body, a seat body pivotally supported from a sideways sitting state to a vertical standing state in which a front end faces upward, and a direction in which the seat body is in a standing state In a chair provided with a biasing means that always biases,
The biasing means is formed with a winding spring having one end fixed to the lower part of the seat body and the other end being a free end, and the winding spring is held in a lateral direction in the front-rear direction in the seated state, and A chair characterized in that one end is fixed to a pivot on which a seat is pivotally supported and connected to the other end of a wire disposed along a circumferential direction of the pivot.   The seat body includes a seat body and a bearing member that is fixed to the lower surface of the seat body and pivotally supports the seat body on the pivot, and one end of the winding spring is fixed to the front portion of the bearing member. The chair according to claim 1.   A U-shaped pivot bearing portion in a side view is formed on both the left and right sides of the rear portion of the bearing member at a desired distance, a fixing portion for fixing one end of the winding spring is formed at the center of the front portion, and The chair according to claim 2, wherein one end of a wire is fixed to the pivot between the pivot bearing portions, is arranged along a circumferential direction of the pivot, and the other end of the wire is connected to the free end of the winding spring.   The chair according to claim 2 or 3, wherein the seat body includes a seat body, a bearing member, and a seat lower surface cover, and the lower surface of the seat body and the bearing member are covered from below with the seat lower surface cover.

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