JP2009273585A - Chair - Google Patents

Abstract

【Task】
It is possible to adjust the substantial depth width of the seat by moving the backrest back and forth according to the physique of the seated person, so that the optimal height position of the back can be set for any seated person Provided is a chair capable of supporting and stably holding a waist.
[Solution]
A seat part 2 supported by the leg part 1 and a backrest part 3 provided at the rear part of the seat part are provided, and the substantial depth width of the seat part is adjusted by moving the seat part or the backrest part in the front-rear direction. The backrest part is a chair that can be fixed, and the back support member 7 is fixed to the upper ends of the backrest saddles 6 and 6 raised from both sides of the seat part, and the back support member 7 is spaced below the back support member. A waist support member 8 is provided, and both sides of the waist support member are supported by the middle part of both backrests so as to be vertically movable, and the lower end of the waist support member is always in contact with the upper surface of the seat part. Urgently.
[Selection] Figure 1

Description

  The present invention relates to a chair, and more particularly to a chair capable of adjusting a substantial depth width of a seat portion by moving a seat portion or a backrest portion in the front-rear direction according to a physique of a seated person. is there.

  Conventionally, there has been provided a chair capable of adjusting a substantial depth width of a seat portion according to a physique of a seated person. In Patent Document 1, a seat back is provided as a chair that is provided with a backrest standing behind the seat, the seat can be moved back and forth, and the substantial depth of the seat can be adjusted. And a shutter structure part in which at least the rear part of the seat plate is provided so as to be slidable back and forth, and at least the rear part of the seat plate is connected to each other so that it can be bent. A chair with a slide seat plate is described in which the structure part is guided upward along the backrest part.

  Certainly, the chair described in Patent Document 1 can adjust the substantial depth width of the seat portion by moving the seat plate back and forth. However, although the optimum height position for supporting the back changes depending on the physique, there is no such adjustment function because the height of the backrest is always fixed at a constant height. In addition, when the seat plate is moved backwards according to a child with a small physique, the shutter structure at the rear of the seat plate can rise upward and stop the waist, but it will be a flat support. There is no function to hold against left and right deflection.

  In order to improve the inconvenience, Patent Document 2 discloses a chair for children that can adjust the back and forth position and height of the backrest at the same time as the user's body grows. And a backrest supported movably back and forth by guide means provided so as to extend in the front-rear direction below the seat board, and the guide means has a lower front side and a higher rear part. By tilting in a side view, the backrest is set to rise while moving backward, and further, the guide means has an unlocked state in which the backrest can be moved back and forth and is unable to move back and forth. There is described a chair provided with operating means such as a lever for switching to a locked state to be held.

The chair described in Patent Document 2 is a mechanism in which the backrest part is lowered as the backrest is moved forward with respect to the seat part, and the backrest part is adjusted to a substantially optimal height according to the physique of the seated person. It is possible. However, since a relatively large space is provided between the seat portion and the backrest portion to allow the vertical displacement of the backrest portion, the structure does not support the seated person's waist, In other words, when a child with a small physique is seated, there is no function of stably supporting the waist and holding it against left-right deflection.
Japanese Patent Application Laid-Open No. 07-163438 JP 2002-262953 A

  Therefore, in view of the above-described situation, the present invention intends to solve the problem that the substantial depth width of the seat portion can be adjusted by moving the backrest portion back and forth according to the physique of the seated person. It is an object of the present invention to provide a chair that can support an optimal height position of the back and can stably hold the lumbar portion of a occupant of any physique.

  In order to solve the above-mentioned problem, the present invention includes a seat portion supported by a leg portion and a backrest portion provided at the rear portion of the seat portion, and moves the seat portion or the backrest portion in the front-rear direction. And the backrest portion fixes a back support member to the upper end portions of both backrest ridges raised from both sides of the seat portion. A waist support member is disposed below the back support member with an interval, and both side portions of the waist support member are supported by the middle portion of both backrests so as to be vertically movable, and the lower end of the waist support member. The chair is configured to be urged so as to always come into contact with the upper surface of the seat (claim 1).

  Here, a cylindrical support portion provided on both side portions of the waist support member is fitted to the middle portion of the backrest heel so as to be slidable up and down, and the waist support member is elastically biased downward. (Claim 2).

  Specifically, a compression coil spring is wound between the upper end of the support portion of the waist support member and the fixing portion with respect to the backrest, and the waist support member is elastically biased downward so that the lower end is always It was made to contact the upper surface of the seat (claim 3).

  More specifically, the support portion of the waist support member and the compression coil spring are incorporated in a lower cover body that is extrapolated so as not to move with respect to the backrest, and a vertical slit formed in the lower cover body. A connecting plate for connecting the support portion to the waist support member is inserted, and the compression coil spring is interposed between the upper end of the support portion and a step portion provided in the upper portion of the lower cover body. (Claim 4).

  The back support member and the waist support member have a circular arc-shaped receiving surface with both end portions projecting forward, and at least a lower end portion of the waist support member at a contact portion between the waist support member and the seat portion. It is more preferable that a cover material or a sliding member having good slidability is disposed on the surface.

  In addition, the seat portion supports a seat plate on an upper portion of a support body attached to the leg portion, the support body is disposed on a base member supported by the leg portion, and an upper portion of the base member, and a rear portion is provided. A tilting member pivotally supported at the rear part of the base member so as to be tiltable up and down, and an angle adjusting means provided in linkage between the base member and the front part of the tilting member, for adjusting the tilt angle of the tilting member, The effect of the present invention is remarkable when the base member is provided with guide means and the front / rear inclination angle of the seat plate supported by the inclined member can be adjusted (Claim 6).

  In the chair of the invention according to claim 1 as described above, the backrest portion fixes the back support member to the upper end portions of the two backrest ridges raised from both sides of the seat portion, and is spaced below the back support member. A waist support member is placed, and both side portions of the waist support member are supported by the middle portion of the backrest heel so as to be vertically movable, and the lower end of the waist support member is always in contact with the upper surface of the seat portion. Therefore, even when the backrest is moved in the front-rear direction with respect to the seat, or when the seat is moved in the front-rear direction with respect to the backrest, that is, according to the physique of the seated person Even when the front and back positions of the seat part and the backrest part are changed, the waist part of the seated person can always be stably held by the waist support member. In addition, as a mechanism for moving the backrest portion forward, the lower end of the waist support member is always placed on the seat, even when the mechanism has a height that decreases as it moves forward or when the angle of the seat portion is not horizontal. Since it touches the upper surface of the seat, the waist of the seated person can be stably held. The waist support member supports both sides of the standing backrest so that it can move up and down, so that the position of the waist support member follows by the weight of the waist support member or the downward biasing by the elastic body. And since the lower end always contacts the upper surface of the seat part, the waist support member is positioned on the waist part of the seated person regardless of the backrest part.

  According to the second aspect of the present invention, the cylindrical support portions provided on both side portions of the waist support member are externally slidably fitted in the middle portion of the both backrest heels. The support is reliable, the waist support member can be smoothly slid up and down, and if the waist support member is elastically biased downward, the lower end of the waist support member is always in contact with the upper surface of the seat Thus, the waist support member is not lifted up unexpectedly, or the waist support member does not rattle while the chair is being transported.

  According to claim 3, a compression coil spring is wound between the upper end of the support portion of the waist support member and the fixing portion for the backrest, and the lower end is elastically urged downward. Since the upper surface of the seat portion is always contacted, the waist supporting member can be reliably elastically urged downward, and the elastic urging mechanism can be made compact.

  According to a fourth aspect of the present invention, the support portion of the waist support member and the compression coil spring are incorporated in a lower cover body that is extrapolated so as not to move with respect to the backrest heel, and the longitudinal direction formed in the lower cover body. A connecting plate for connecting the support portion to the waist support member is inserted into the slit, and the compression coil spring is interposed between the upper end of the support portion and a step portion provided in the upper portion of the lower cover body. Therefore, it is excellent in appearance and safe because the sliding part is hidden.

  According to the fifth aspect of the present invention, the back support member and the waist support member have arc-shaped receiving surfaces with both end portions projecting forward, so that the back and the waist of the seated person can be held. In particular, even a child with a small physique can be held stably against left-right deflection. Furthermore, the waist support member can be smoothly moved with respect to the seat portion by disposing a covering material or a slide member having good slidability at least at the lower end of the waist support member at the contact portion between the waist support member and the seat portion. Can slide.

  According to claim 6, by lowering the front part of the seat part, the pressure on the back of the thigh of the seated person is reduced, and in a chair that can realize a comfortable sitting comfort, even when the angle of the upper surface of the seat part changes, Even when the back and forth position of the backrest portion changes, the lower end of the waist support member can always be kept in contact with the upper surface of the seat portion, and a desired sitting comfort can always be realized.

  Next, the present invention will be described in more detail based on the embodiments shown in the accompanying drawings. FIG. 1 shows a chair according to the present invention, FIG. 2 is a side view of the chair showing how the inclination angle of the seat is adjusted, and FIG. 3 is a side view of the chair showing how the back-and-forth position of the backrest is adjusted. 4 to 9 show the main part of the present invention, in which 1 is a leg, 2 is a seat, 3 is a backrest, 4 is guide means, 5 is a moving frame, and 6 is a back. Drowning collar, 7 is a back support member, and 8 is a waist support member.

  The chair according to the present invention includes a seat portion 2 supported by the leg portion 1 and guide means extending in the front-rear direction below the seat portion 2 and inclined in a side view so that the front side is low and the rear portion is high. 4, a moving frame 5 provided so as to be movable along the guide means 4, and a backrest 3 having a lower end fixed to the moving frame 5, and the backrest 3 is moved back and forth with respect to the seat 2. It has a basic structure that can be moved and adjusted in the direction. In addition, in this invention, besides the said backrest part 3 moving to the front-back direction, it can apply similarly when the said seat part 2 moves to the front-back direction, and when the backrest part 3 moves. In addition to the structure in which the guide means 4 is inclined as in the present embodiment, the present invention can also be applied to the case where the guide means 4 is horizontal and the backrest 3 moves horizontally.

  In the chair according to the present invention, the backrest 3 fixes the back support member 7 to the upper end portions of the backrest ridges 6 and 6 raised from both sides of the seat 2, and the backrest 3 A waist support member 8 is disposed below the support member 7 with an interval, and both side portions of the waist support member 8 are provided to be supported by the middle portions of the backrest ridges 6 and 6 so as to be movable up and down. The lower end of the member 8 is always urged so as to contact the upper surface of the seat portion 2. Here, as a means for urging the waist support member 8 downward, there is a force by the weight of the waist support member 8 or an elastic force by an elastic body.

  More specifically, as shown in FIG. 2, the seat 2 supports a seat plate 10 on an upper portion of a support 9 attached to the leg 1, and the support 9 is supported by the leg 1. A base member 11, a tilting member 12 disposed above the base member 11 and having a rear portion pivotally supported on the rear portion of the base member 11 so as to tilt up and down, and a base member 11 and a front portion of the tilting member 12 are linked. And an angle adjusting means 13 for adjusting the inclination angle of the tilting member 12. The guide means 4 is provided on the base member 11, and the front and rear inclination angles of the seat plate 10 supported by the inclined member 12 are adjusted. This is a possible structure. Reference numeral 14 in the figure denotes a pivotal support portion of the base member 11 and the tilting member 12, and the front portion of the tilting member 12 tilts up and down with the pivotal support portion 14 as a fulcrum.

  The waist support member 8 is integrally provided with a cylindrical support portion 16 at an end portion of a connecting plate 15 fixed to the back side of both side end portions, and a cylindrical sleeve 17 is provided inside the support portion 16. The sleeve 17 is externally fitted to the backrest 6 so as to be slidable up and down. Here, in the present embodiment, the connecting plate 15 and the support portion 16 are formed from a single steel plate, one end of a square steel plate is wound into a roll shape, and is formed into a cylindrical shape. , And the plane portion is the connecting plate 15 and the cylindrical portion is the support portion 16. The sleeve 17 is a molded article made of synthetic resin with good slipperiness, and has a slit groove 18 having a predetermined width in the longitudinal direction, and has flanges 19 and 19 projecting in an annular shape on the outer periphery of the upper and lower ends. A cylindrical engaging portion 20 is provided so as to protrude above the flange portion 19.

  Then, in a state where the sleeve 17 is pressed and contracted to reduce the diameter, the sleeve 17 is inserted into the support portion 16, is brought into close contact with the inner surface of the support portion 16 by elastic restoration, and the upper and lower flange portions 19, 19 are attached to the support portion. 16 is engaged with the outside of the upper and lower end edges and is prevented from being removed. The lower end portion of the compression coil spring 21 is fitted and held in the engaging portion 20 at the upper end portion of the sleeve 17. In principle, the support portion 16 is extrapolated to the backrest 6 via the sleeve 17 so as to be slidable up and down, and a compression coil spring 21 is wound from above to support the lower end of the compression coil spring 21. The waist support member 8 is elastically biased downward by engaging the engagement portion 20 and locking the upper end to a fixed portion that does not move with respect to the backrest 6, and the lower end of the waist support member 8. Can always be in contact with the upper surface of the seat 2.

  In the present embodiment, the support 16 and the compression coil spring 21 are covered with a synthetic resin cover so as not to be exposed. That is, the backrest 6 is made of a metal having a round pipe shape, and the bellows cover body 22 is externally mounted on a portion that curves and rises from the moving frame 5, and a lower cover is formed on a portion that rises linearly on the top. The body 24 and the upper cover body 24 are exteriorized. The support 16 and the compression coil spring 21 are built in the lower cover body 23. Here, the upper straight portions of the backrest ridges 6 and 6 on both sides rise in parallel while being slightly inclined rearward. The bellows cover body 22 is omitted because it is not essential except for FIG.

  More specifically, as shown in FIGS. 4 and 5, the lower cover body 23 is blow-molded into a cylindrical shape, and forms a ring-shaped flange portion 25 with a reduced diameter at the lower end portion, and shrinks upward. A cylindrical portion 26 having a diameter is formed, and an intermediate portion thereof serves as a cover portion 27 into which the support portion 16 and the compression coil spring 21 are loosely inserted. The flange portion 25 and the cylindrical portion 26 are set to have an inner diameter that is tightly fitted to the backrest 6, and a slit 28 is formed along the vertical direction inside the cover portion 27. Inside the boundary between the cylindrical portion 26 and the cover portion 27, there is a step portion 29 that stops the upper end of the compression coil spring 21.

  Then, as shown in FIG. 5, the lower end of the compression coil spring 21 is fitted into the engagement portion 20 at the upper end of the support portion 16 fixed to both side portions of the waist support member 8 and is compressed. When the slit 28 of the cover body 23 is expanded and the support portion 16 and the compression coil spring 21 are pushed into the cover portion 27 and then the force is released, the upper end of the compression coil spring 21 stops against the step portion 29. In addition, the slit 28 is restored to its original shape, and the connecting plate 15 is loosely inserted into the slit 28 (see FIG. 6). In this state, the support portions 16 and 15 and the lower cover bodies 23 and 23 on both sides of the waist support member 8 are extrapolated from the upper ends of the backrest ridges 6 and 6, and the cylindrical portion 26 is put into the back at a predetermined position. Screw on the scissors 6. Here, the screwing of the cylindrical portion 26 is combined with a screw 30 for screwing the back support member 7 to the upper end portion of the backrest 6.

  Further, the upper cover body 24 is a molded product made of synthetic resin, and is attached to the upper end portion of the backrest heel 6 from the side, and has a substantially U-shaped cross section with one side open, The lower part is opened, and the upper part is formed with a closing part 31 so as to conceal the upper end of the backrest heel 6, and the elastic engagement pieces 32, 32 are provided so that the backrest heel 6 can be elastically held from both sides. In order to further restrict the vertical movement, dowels 33 and 33 are vertically projected on the bottom of the inside and engaged with engagement holes 34 and 34 formed on the outer surface of the upper end portion of the backrest 6. It is supposed to be.

  As shown in FIG. 8, the back support member 7 has a receiving surface 35 having a circular arc shape in plan view with both end portions projecting forward. Specifically, the back support member 7 is provided with a cushion body 37 formed in a predetermined shape on the front side of a wooden core member 36 that is curved in an arc shape, and has a square shape in plan view on the back surfaces of both end portions. One piece of the connecting metal fittings 38, 38 is fixed with screws, the other attachment piece 39 is positioned on the end face, and the whole is covered with a cover material such as a cloth (not shown). Here, the attachment pieces 39, 39 of the connecting fittings 38, 38 on both sides are set in parallel. Then, the back support member 7 is disposed between the upper end portions of the backrest ridges 6 and 6, and screws are attached to the mounting holes 40 and 40 formed through the inside and outside of the upper end portion of the backrest ridge 6 from the outside. 30 and 30 are inserted and screwed into the mounting piece 39 of the connecting fitting 38 for mounting. At this time, the cylindrical portion 26 of the lower cover body 23 is set so as to cover the position of the lower mounting hole 40, the through hole 41 is formed inside the cylindrical portion 26, and the vertically long slot 42 is formed outside. The lower screw 30 is inserted into the mounting hole 40 located in the long hole 42 and is also inserted into the through hole 41 and screwed into the mounting piece 39. After the back support member 7 is attached to the backrests 6 and 6, the upper cover body 24 is externally fitted to the upper end of the backrest 6 from the sides, and both elastic engagement pieces 32 and 32 are attached. And the dowels 33 and 33 are engaged with the engaging holes 34 facing the lower portion of the elongated holes 42 and the upper engaging holes 34 so as to be externally mounted. . In this state, the cylindrical portion 26 of the lower cover body 23 is covered with the upper cover body 24.

  Further, as shown in FIG. 9, the waist support member 8 has a receiving surface 43 having a circular arc shape in plan view with both end portions projecting forward like the back support member 7. Specifically, the waist support member 8 is provided with a cushion body 45 molded in a predetermined shape on the front side of a wooden core member 44 curved in an arc shape, and the connecting plate 15 is screwed to the back surfaces of both end portions. The structure is fixed and covered with a cover material such as a cloth (not shown).

  In this way, with the back support member 7 and the waist support member 8 attached to the backrest ridges 6 and 6 on both sides, the lower end of the waist support member 8 contacts the upper surface of the seat plate 10 of the seat portion 2. ing. The upper surface of the seat plate 10 has a three-dimensional shape with a recessed central portion in order to improve sitting comfort, but the lower end of the waist support member 8 is also set to a shape corresponding thereto. Then, when the backrest 3 moves the moving frame 5 forward along the guide means 4 from the state shown in FIGS. 2 and 6, the guide means 4 is inclined as shown in FIGS. The backrest 3 is displaced forward and downward along. At that time, the lower end of the waist supporting member 8 rises relative to the backrests 6 and 6 against the elastic force of the compression coil spring 21 while the lower end slides on the upper surface of the seat plate 10. Since the waist support member 8 is elastically biased downward, the lower end always maintains a state in contact with the upper surface of the seat plate 10. When the backrest 3 is adjusted back and forth, the lower end of the waist support member 8 slides with respect to the seat plate 10, so that at least the waist support member 8 of the waist support member 8 can be operated smoothly. It is desirable that a cover material made of a material having high slidability is positioned at the lower end contact portion. When the cover material of the seat plate 10 and the waist support member 8 is soft leather, the slidability is relatively good, but when it is a cross, the slidability is poor, so at least the lower end of the waist support member 8 The slidability can be improved by attaching soft leather to the contact portion. It is also preferable to provide a sliding member made of synthetic resin at the lower end of the waist support member 8.

  In addition, as shown in FIG. 2, the chair of this embodiment can adjust the inclination angle of the seat portion 2 by operating the angle adjusting means 13. At that time, the position of the seat plate 10 in contact with the lower end of the waist support member 8 is displaced up and down. In this case, the waist support member 8 slides up and down with respect to the backrest ridges 6 and 6. Since it is possible, it slides up and down according to the displacement. In addition, a sufficient interval is formed between the back support member 7 and the waist support member 8 to allow the waist support member 8 to move up and down. Therefore, the backrest 3 and the seat 2 In any state, the lower end of the waist supporting member 8 is kept in contact with the upper surface of the seat portion 2.

  As described above, since the waist support member 8 exists at the lower part of the backrest part 3, the waist part of the seated person can be held so as to be wrapped from the left and right by the receiving surface 43, and can be held stably against the left and right runout. It can be done. In addition, since the support surface 35 of the back support member 7 is supported so as to be wrapped from the left and right, the seating posture is stable, and even a small physique can be seated stably without any left-right swing.

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 side view of the chair of the state which similarly moved the backrest part ahead. It is a disassembled perspective view of the principal part which shows the structure which supports a waist support member to a backrest slidable up and down. It is the disassembled perspective view which showed the procedure which mounts the support part of a waist support member, and a compression coil spring to a lower cover body. It is a fragmentary sectional view in the state where a principal part of the present invention is shown and a backrest part is located most back. It is the fragmentary sectional view of the state which similarly moved the backrest part forward. A back support member is shown, (a) is a top view and (b) is a front view. A waist support member is shown, (a) is a top view and (b) is a front view.

Explanation of symbols

1 leg, 2 seat,
3 backrest, 4 guide means,
5 Moving frame, 6 Backrest,
7 back support member, 8 waist support member,
9 Support, 10 Seat plate,
11 base member, 12 tilting member,
13 angle adjustment means, 14 pivots,
15 connecting plate, 16 support part,
17 Sleeve, 18 Slit groove,
19 buttocks, 20 engaging parts,
22 bellows cover body, 23 lower cover body,
24 upper cover body, 25 flange part,
26 cylindrical part, 27 cover part,
28 slits, 29 steps,
30 screws, 31 closures,
32 elastic engagement pieces, 33 dowels,
34 engaging hole, 35 receiving surface,
36 core material, 37 cushion body,
38 connecting brackets, 39 mounting pieces,
40 mounting holes, 41 through holes,
42 long hole, 43 receiving surface,
44 core material, 45 cushion body.

Claims (6)

  A seat part supported by the leg part and a backrest part provided at the rear part of the seat part, and the substantial depth width of the seat part is adjusted by moving the seat part or the backrest part in the front-rear direction. The backrest portion is configured to fix the back support member to the upper end portions of the two backrest ridges rising from both sides of the seat portion, and at intervals below the back support member. A waist support member is provided, and both side portions of the waist support member are supported on the middle part of both backrests so as to be vertically movable so that the lower end of the waist support member is always in contact with the upper surface of the seat portion. A chair characterized by being energized.   A cylindrical support portion provided on both side portions of the waist support member is fitted to an intermediate portion of the backrest heels so as to be slidable up and down, and the waist support member is elastically biased downward. The chair according to 1.   A compression coil spring is wound between the upper end of the support portion of the waist support member and the fixing portion for the backrest, and the lower end is always on the upper surface of the seat portion by elastically biasing the waist support member downward. The chair according to claim 2, which is in contact with the chair.   The support portion of the waist support member and the compression coil spring are incorporated in a lower cover body that is extrapolated so as not to move with respect to the backrest, and the support portion is placed in a vertical slit formed in the lower cover body. The chair according to claim 3, wherein the compression coil spring is interposed between an upper end of the support portion and a step portion provided in an upper portion of the lower cover body while inserting a connection plate connected to the support member.   The back support member and the waist support member have arc-shaped receiving surfaces in plan view with both end portions projecting forward, and at least the lower end portion of the waist support member is slid at the contact portion between the waist support member and the seat portion. The chair according to any one of claims 1 to 4, wherein a chair or sliding member having good mobility is arranged. The seat portion supports a seat plate on an upper portion of a support body attached to the leg portion, the support body is disposed on a base member supported by the leg portion, and a base portion of the base member, and a rear portion is disposed on the base portion. A tilting member pivotally supported at the rear part of the member so as to be tiltable up and down, and an angle adjusting means provided in linkage between the base member and the front part of the tilting member to adjust the tilt angle of the tilting member, The chair according to any one of claims 1 to 5, wherein a guide means is provided on the member, and a front and rear inclination angle of the seat plate supported by the inclined member can be adjusted.

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