JP6161405B2 - Chair - Google Patents

Description

  The present invention relates to a chair.

  Conventionally, a chair in which a backrest and an armrest are integrally formed of a resin is known (for example, see Patent Document 1). In order to ensure a certain level of strength, the support frame is made of a pipe material with a relatively large diameter, and the upper end of the rear leg that constitutes the support frame is connected to the front part of the armrest. It is supposed to be.

  However, in the conventional one, since most of the load applied to the backrest and armrest is structured to be received by the rear legs, the design freedom for securing the strength of the support frame is low, For example, there is a certain limit in reducing the diameter of the support frame.

JP 2004-194918 A

  The present invention has been made paying attention to the above circumstances, and provides a chair with a high degree of design freedom for securing the strength of a support frame in a chair in which a backrest and an armrest are integrally formed of resin. There is to do.

  That is, the chair of the present invention has the following configuration.

The chair according to claim 1 is made of a metal pipe material, and has a rear leg, a base extending forward from a lower end portion of the rear leg, and an upward standing continuously from the front end of the base. And a support frame having a closed loop structure in a side view, and a support frame having a closed loop structure in a side view. A chair comprising a supported backrest, wherein the backrest and the armrest are integrally formed of resin, and the armrest extends in the front-rear direction and the rear end is connected to the backrest. An armrest body provided, and a mounting portion provided at a front end of the armrest body and attached to a mounting portion provided at an upper end portion of the rear leg, and the armrest body and the mounting portion are viewed in a side view. shape bent in dogleg shape in Those that are integrally molded to form a.

According to a second aspect of the present invention, in the configuration according to the first aspect, the pipe material having a diameter of 13.1 mm to 15 mm is applied.

According to a third aspect of the present invention, in the configuration according to the first or second aspect, the elbow rest of the armrest body has an elbow rest surface inclined forward with respect to a horizontal plane over the entire upper surface of the elbow rest. .

According to a fourth aspect of the present invention, in the configuration according to the first, second, or third aspect, the rear end of the seat receiver is located behind the position where the rear leg and the seat receiver intersect in a side view. It is what.

  As described above, according to the present invention, in a chair in which a backrest and an armrest are integrally formed of resin, a chair with a high degree of design freedom for ensuring the strength of the support frame can be provided.

The perspective view which shows one Embodiment of this invention. The front view in the embodiment. The top view in the embodiment. The side view in the embodiment. The side view which shows the state which stacked the other chair on the chair in the embodiment. The exploded perspective view in the embodiment. The exploded rear view in the embodiment. The rear perspective view in the embodiment. AA line expanded sectional view in FIG. The BB line expanded sectional view in FIG. FIG. 4 is an enlarged sectional view taken along line CC in FIG. 3. The center side sectional view of the state where the back cover in the embodiment was attached. The DD sectional view taken on the line in FIG.

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

  In this embodiment, the present invention is applied to a chair S using a thin pipe material. The chair S is preferably used in, for example, an office, a general meeting room, or a facility with many elderly people.

  In the chair S, an armrest 2 and a back plate 3 as a backrest are integrally formed of resin. The longitudinal dimension of the armrest 2 is set to be relatively short, and the front portion of the armrest 2 is connected to the upper ends of the left and right rear legs 11 of the support frame 1. That is, the armrest body 21 of the armrest 2 is supported in a cantilever shape by the support frame 1, and the back plate 3 is supported by the support frame 1 via the armrest 2. As specifically shown in FIG. 5, the chair S is configured such that a plurality of other chairs S ′ having the same structure can be stacked in the vertical direction. For convenience of explanation, in FIG. 5, “′” is attached to the reference numerals of other chairs S ′ having the same structure as the chair S.

  The chair S includes a support frame 1, an armrest 2, a back plate 3, and a seat 4 that are supported by the support frame 1. A back cover T is detachably attached to the back plate 3. Details will be described below.

<Support frame>
The support frame 1 is mainly composed of a metal pipe material t1. The chair S of this embodiment can apply a pipe material t1 having a diameter of 15 mm or less. Specifically, a pipe material t1 having a diameter of about 13.1 mm is used. The support frame 1 includes a rear leg 11 connected to the front portion of the armrest 2 at the upper end, a base 12 extending forward from the lower end of the rear leg 11, and a front end of the base 12 extending upward. A front leg 13 that stands up and a seat receiver 14 that continues to the upper end of the front leg 13 and extends rearward are formed integrally with a common pipe material t1.

  The rear leg 13 and the seat 14 intersect each other in a side view. The rear leg 13 and the seat receiver 14 are rigidly connected to each other via a horizontal rod 15 at a position where the rear leg 13 and the seat receiver 14 intersect in a side view. The rear leg 13 and the seat 14 connected via the horizontal rod 15 are spaced apart in the left-right direction. The seat 14 is positioned inside the rear leg 13. The rear end of the seat receiver 14 is located behind the position where the rear leg 11 and the seat receiver 14 intersect in a side view.

  Between the left and right seat receivers 14, a front horizontal member 16 and a rear horizontal member 17, which form a band for supporting the seat 4, are installed. Blocked resin grounding bodies 18 are attached to the front and rear portions of the left and right bases 12. As shown in FIG. 5, when stacking another chair S ′ having the same structure on the chair S, the lower surface of the grounding body 18 ′ of the other chair S ′ contacts the upper surface of the base 12 of the support frame 1. It is like that.

  The support frame 1 has a loop structure in a side view. Specifically, the rear leg 11 and the seat receiver 14 are welded to the horizontal rod 15 interposed therebetween, and the rear leg 11, the base 12, the front leg 13, the seat receiver 14, and the horizontal rod 15 A closed loop structure with excellent rigidity is formed.

  The rear leg 11 is inclined forward in a range of about 65 to 70 ° with respect to a horizontal surface such as a floor surface in a side view. An upper end portion of the rear leg 11 is provided with an attachment portion t to which the attached portion u of the armrest 2 is attached.

  The attachment portion t has a convex shape upward, and is arranged in the hollow portion t11 so as to fill the hollow portion t11 of the metal pipe material t1 and the pipe material t1, and a part of the pipe material t1. And a metal cored bar member t2 that protrudes from the end portion. Although the illustrated cored bar member t2 is solid, it may be hollow pipe-shaped. Moreover, the attachment part t may be formed integrally with the element of the pipe material t1 and the element of the solid cored bar member t2. A first screw hole h1 is formed in a protruding portion t21 of the cored bar member t2 that is projected from the end of the pipe material t1 in a direction perpendicular to the axis of the cored bar member t2. As shown by a hidden line in FIG. 6, the cored bar member t <b> 2 extends to the inside of the pipe material t <b> 1 constituting the rear leg 11, and the lower end of the cored bar member t <b> 2 extends to the lower part of the rear leg 11. The strength of the pipe material t1 is improved. The specific attachment between the attachment portion t of the support frame 1 and the attachment portion u of the armrest 2 will be described later.

  The base 12 is disposed substantially parallel to the floor surface, and connects the lower end of the rear leg 11 and the lower end of the front leg 13.

<Armrest>
The armrest 2 is formed integrally with the back plate 3 and resin, and includes an armrest main body 21 whose rear end is connected to the backplate 3 and a mounted portion u provided at the front end of the armrest main body 21. ing. The armrest body 21 and the attached portion u are integrally formed of resin.

  The armrest main body 21 has a block shape extending in the front-rear direction, and includes an elbow rest 211 and a reinforcing block 212 attached to the lower surface of the elbow rest 211.

  The elbow rest 211 is a flat plate having an elbow rest surface inclined forward by about 7 ° with respect to a horizontal surface such as a floor surface. Of course, the forward tilt angle of the elbow rest surface is not limited to 7 °. In this way, the elbow rest surface is tilted forward so that the function of the armrest 2 can be used effectively regardless of the size of the seated person, and the assisting person when the seated person stands up. The function is demonstrated effectively. The elbow rest 211 has a rear end portion extending rearward from the position of the back of both side ends of the back plate 3. The inner surface of the elbow rest 211 is set flush with the inner surface of the reinforcing block 212. The outer edge of the elbow rest 211 protrudes outward from the outer edge of the reinforcing block 212.

  The reinforcing block 212 includes a plurality of walls k having an upper edge continuous with the lower surface of the elbow pad 211 and a front edge integrated with the outer peripheral surface of the attached portion u. In the present embodiment, the reinforcing block 212 includes three walls k arranged in parallel in the left-right direction and ribs r that join adjacent walls k together. As shown in FIG. 13, the rib r is inclined so as to gradually descend toward the rear. In addition, in the rear portion of the reinforcing block 212, two rearward opening hole portions p1 that are opened in a vertically long rectangular shape toward the rear are formed, and the rearward opening hole portions p1 are provided side by side on the left and right. The reinforcing block 212 is formed with six downward opening holes p2 that are opened downward in a vertically long rectangular shape by the ends of the walls k and the ends of the ribs r. Since the reinforcing block 212 includes a plurality of rearward opening holes p1 and downward opening holes p2, when the user carries the chair S, fingers are easily caught in the opening holes p1 and p2, and slipping occurs. The function as a stop can be demonstrated.

  The attached portion u forms a part connected to the rear leg 11 of the support frame 1 and has a bottomed cylindrical shape that opens downward. The outer diameter dimension in the front-rear direction of the attached portion u is set to be smaller than the outer diameter dimension in the left-right direction of the attached portion u. The outer diameter dimension in the left-right direction in the part excluding the lower end near the opening in the attached part u and the upper end connected to the elbow rest 211, that is, the upper and lower intermediate part in the attached part u is set to be approximately the same dimension. Has been. The to-be-attached part u is provided with the fitting recessed part u1 fitted to the protrusion part t21 smaller in diameter than the outer diameter of the pipe material t1, and the outer fitting part u2 fitted to the pipe material t1. In other words, the attached portion u includes a small diameter hole m1 into which the protruding portion t1 is fitted, and a large diameter hole m2 that is continuous with the small diameter hole m1 and into which the pipe material t1 is fitted.

  As shown in FIG. 5, the chair S of the present embodiment can stack the other chair S ′ in a state where the attached portion u ′ of the other chair S ′ having the same structure is in contact with the attached portion u. It is like that. More specifically, stacking can be performed in a state in which the back surface of the mounted portion u 'of the other chair S' is in contact with the front surface of the mounted portion u of the chair S.

  As shown in FIG. 10, a thickness ub of the portion ub located on the rear side of the support frame 1 in the attached portion u, that is, the portion ub located on the rear side of the rear leg 11 is It is set to be thinner than the thickness w1 of the part uf located on the front side of the support frame 1, that is, the part uf located on the front side of the rear leg 11. In other words, the thickness dimension w2 in the front-rear direction of the part ub located on the rear side of the rear leg 11 is set shorter than the thickness dimension w1 in the front-rear direction of the part uf located on the front side of the support frame 1 in the attached portion u. Has been. By doing in this way, the pitch in the front-rear direction accompanying stacking is shortened.

  The attached portion u includes a first screw insertion hole n1 on the side portion. Then, the screw v1 that has passed through the first screw insertion hole n1 is screwed into the first screw hole h1 provided in the protruding portion t21 of the cored bar member t2, whereby the mounting portion t of the support frame 1 and the armrest 2 The to-be-attached part u is attached. The attached portion u includes a second screw insertion hole n2 at the rear portion. Then, the second screw insertion hole n2 is connected to the second screw hole h2 provided in communication with the pipe material t1 and the core metal member t2 in a direction orthogonal to the axis of the pipe material t1 and the core metal member t2. The mounting portion t1 of the support frame 1 and the mounted portion u of the armrest 2 are mounted by screwing the screw v2 that has passed through the bracket.

  Further, as shown in FIG. 4 and the like, the armrest 2 is integrally formed of resin so that the armrest body 21 and the attached portion u are bent in a dogleg shape in a side view. And the fitting recessed part u1 is set so that it may be located in the bending part F formed of the armrest main body 21 and the to-be-attached part u. With this configuration, a large resin thickness is obtained at the bent portion F where the load tends to concentrate.

  In addition, the chair S of this embodiment is configured in a square shape in side view by the armrest body 21 and the attached portion u provided at the front end of the armrest body 21, and the rear portion is like a general armrest. Is cantilevered and has a configuration different from that of the projecting end of the front portion. For this reason, the chair S is suitable because the clothes of the seated person are not easily caught on the armrest 2 when standing up from the seated state.

<Backboard>
The back plate 3 is made of a resin having a plate shape, and has a curved shape such that a central portion thereof is convex rearward in a plan view. The back plate 3 includes a bent portion 31 that is bent toward the rear in a side view at the upper end portion, and a groove 32 that is opened outward at the lower end portion.

  The back plate 3 is integrally formed of resin together with the armrest 2, and the groove 32 is formed between the left and right armrests 2 at the lower edge of the back plate 3. The groove 32 is open downward. The groove 32 is used when the back cover T is attached. Since the groove 32 opens downward, the groove 32 is less likely to affect the appearance even when the back cover T is not attached. Yes. The attachment of the back cover T to the back plate 3 will be described later.

  The lateral width dimension of the back plate 3 is set shorter than the separation dimension between the left and right bases 12 of the support frame 1. The left and right armrests 2 provided in a manner protruding outward from the left and right edge portions of the back plate 3 are set so as to be positioned substantially directly above the left and right bases 12.

<Za>
The seat 4 is supported by the support frame 1 and includes a seat main body 41 formed of resin and a cushion 42 disposed on the seat main body 41. The seat 4 has a shape in which the tip portion hangs downward.

  The seat body 41 is provided with a cover portion 411 for covering the horizontal rod 15 of the support frame 1 at the rear portion of the left and right side edge portions. The cover portion 411 is positioned around the horizontal rod 15 and in front of and behind the rear leg 11. Specifically, the cover portion 411 covers the upper cover portion 411 a that covers the upper surface of the horizontal rod 15 and the front and rear of the horizontal rod 15. And a front / rear cover part 411b extending to a position covering the front and rear sides of the rear leg 11.

  The cushion 22 is a normal one in which an upholstery is stretched on the outer surface of a cushioning sponge material.

<Back cover>
The back cover T covers at least a part of the back plate 3. The back cover T includes a back cover body T1 and an insertion portion T2 disposed at a lower portion of the back cover body T1.

  The back cover body T1 is made of a sheet-like material such as cloth or artificial leather, and is mainly disposed on the front cover portion T1a disposed on the front surface side of the back plate 3 and mainly on the rear surface side of the back plate 3. And a rear cover portion T1b. By sewing the upper and side edges and side edges of these front and rear cover portions T1a and T1b, a bag-like portion T11 opened downward is formed. The bag-like portion T11 provided on the upper portion of the back cover T in this way is for covering the back plate 3, and in cooperation with the bent portion 31 of the back plate 3, suppresses the positional deviation at the time of mounting. Yes. A cushion material may be separately provided on the rear side of the front cover portion T1a and the inner surface of the bag-like portion T11 in order to impart cushioning properties or impart mounting stability.

  The insertion portion T2 is inserted into the groove 32 formed in the back plate 3 when the back cover T is attached to the back plate 3, and in this embodiment, the resin sewn to the lower end of the back cover body T1. It is made of a manufactured belt-like member.

  The back cover T is attached to the back plate 3 by first covering the upper end portion of the back plate 3 with the bag-like portion T11 and positioning it at a predetermined location, and then inserting the insertion portion T2 provided at the lower end of the back cover body T1. Is inserted into the groove 32 formed at the lower end of the back plate 3 and pushed into the groove 32 together with the lower edge portion of the back cover body T1.

  In addition, when making the upper part of the back cover T into a bag shape and covering the upper part of the back plate 3, as shown in this embodiment, a groove is not provided in the upper edge part of the back plate 3, and only the lower edge is provided. It is preferable to provide the groove 32. In this way, when the back cover T is not attached to the back plate 3, the groove does not appear on the upper edge of the back plate 3, so that the appearance is clear. Therefore, it can be attached to the back plate 3 in a manner in which displacement is suppressed.

  As described above, the chair S according to the present embodiment includes the support frame 1 mainly composed of the metal pipe material t1 and having a loop structure in the side view, and the backrest 3 supported by the support frame 1. And the armrest 2, the backrest 3 and the armrest 2 are integrally formed of resin, and the support frame 1 is connected to the front portion of the armrest 2. is there. For this reason, since the backrest 3 and the armrest 2 are integrally molded by the support frame 1 having a loop structure, the load of the seated person is received by the entire support frame 1, It can be a chair with excellent strength. For example, as specifically shown in the present embodiment, in the chair S, a pipe material t1 having a relatively small diameter can be applied.

  The support frame 1 has a rear leg 11 connected to the front part of the armrest 2 at the upper end, a base 12 extending forward from the lower end of the rear leg 11, and a front end of the base 12 extending upward. Since the standing front leg 13 and the seat receiver 14 that continues to the upper end of the front leg 13 and extends rearward are integrally formed of a common pipe material, the rear leg 11, the base 12, the front leg 13 and the seat receiver 14 are formed. Thus, the support frame 1 having a loop structure mainly composed of the above is constructed, and the loop structure is constructed relatively simply.

  The armrest 2 includes an armrest main body 21 whose rear end is connected to the backrest 3 and a mounted portion u provided at the front end of the armrest main body 21, and the armrest main body 21 and the mounted portion u are arranged on the side surface. Since the support frame 1 having a loop structure is connected to the attached portion u, and the load of the seated person acting on the armrest 2 and the backrest 3 is integrally formed so as to form a bent shape in view. It will be preferably received.

  Since the armrest 211 of the armrest 2 has an armrest surface inclined forward relative to the horizontal plane, the function of the armrest 2 can be used effectively regardless of the size of the seated person. In addition, the auxiliary function when the seated person stands up is effectively exhibited.

  Since the rear end of the seat receiver 14 is located behind the position where the rear leg 11 and the seat receiver 14 intersect in the side view, the support frame 1 receives the load of the seated person in a balanced manner. The design freedom is excellent.

  Since the seat receiver 14 and the rear leg 11 are rigidly connected to each other via the horizontal rod 15 at the intersecting position, the seat 4 ′ of the other chair S ′ is attached to the chair S at the time of stacking. The design flexibility for facilitating the stacking on the seat 4 is excellent.

  Since the seat 4 supported by the seat receiver 14 includes the cover portion 411 that covers the horizontal rod 15, the periphery of the horizontal rod 15 can be made favorable in appearance, and the support frame 1 When attaching the seat 4, it functions suitably as a positioning part.

  Since the armrest main body 21 includes the elbow rest 211 and the reinforcing block 212 attached to the lower surface of the elbow rest 211, the armrest main body 21 having excellent strength can be provided, and the vertical dimension By suppressing the above, it can contribute to good stacking efficiency.

  Since the reinforcing block 212 includes a plurality of walls k having the upper edge continuous with the lower surface of the elbow rest 211 and the front edge integrated with the outer peripheral surface of the attached portion u, it is lightweight as a so-called structural material. Excellent in strength and strength.

  Since the ribs r of the reinforcing block 212 in the armrest body 21 are inclined so as to gradually descend toward the rear, the ribs r can contribute to the expression of a unique appearance, and are constituted by the walls k and the ribs r. This makes it easy to set the number and size of the downward opening holes p2.

  The present invention is not limited to the embodiment described in detail above.

  In the above-described embodiment, the loop structure of the support frame is premised on the presence of horizontal ridges, but is not limited to this, and the loop structure is formed in a manner without horizontal ridges. May be. For example, a mode in which the rear leg and the seat are directly connected by welding or the like can be considered.

  In the above-described embodiment, the other chair having the same structure as the chair has been described as being stackable. However, the other chair having the same structure is not necessarily configured to be stackable.

  In the above-described embodiment, the attached portion has been provided with the fitting recess and the outer fitting portion. However, the embodiment is not limited thereto, and at least the fitting portion in which the protruding portion of the attachment portion is fitted internally. Any device having a recess may be used.

  In the above-described embodiment, the groove for attaching the back cover T is formed only on the lower edge of the back plate. However, the present invention is not limited to this, and the groove is appropriately arranged around the back plate. You may make it form.

  In the above-described embodiment, the insertion portion of the back cover is shown as a belt shape, but is not limited thereto. For example, the insertion portion may be a linear body such as a cord member or a string.

  In the embodiment described above, the thickness of the portion located on the rear side of the support frame (rear leg) in the attached portion is set thinner than the thickness of the portion located on the front side of the support frame in the attached portion. However, the present invention is not limited to this, and conversely, the thickness of the part located on the front side of the support frame in the attached part is the thickness of the part located on the rear side of the support frame in the attached part. It may be set thinner than the thickness.

  In the above-described embodiment, when stacking another chair having the same structure as the chair, the mounted portion u of the other chair having the same structure is in contact with the mounted portion of the chair. It is not limited to this, and it is sufficient if it is close.

  In the above-described embodiment, the first screw hole and the second screw hole are provided in the mounting portion, and a so-called two-point screwing structure in which the screwed portion is attached to each of the mounting portions to attach the mounted portion. Although described, it is not necessarily limited to such a configuration, and a one-point screwing structure may be used. For example, a configuration in which the first screw is screwed and attached to the first screw hole may be used, or a configuration in which the second screw is screwed into the second screw hole and attached.

  In the above-described embodiment, the support frame is mainly composed of a metal pipe material. However, the present invention is not limited to this, and for example, a metal round solid bar material may be used.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

1 ... support frame 2 ... armrest 3 ... backrest 4 ... seat T ... back cover

Claims (4)

Consists of a metal pipe material, a rear leg, a base extending forward from the lower end of the rear leg, a front leg standing continuously upward from the front end of the base, and an upper end of the front leg A support frame that is formed integrally with a common pipe material and has a backrest that is supported by an armrest on the support frame, and a backrest that is supported by an armrest. A chair,
The backrest and the armrest are integrally formed of resin,
The armrest includes an armrest main body extending in the front-rear direction and a rear end connected to the backrest, and a mounting portion provided at a front end of the armrest main body and attached to a mounting portion provided at an upper end of the rear leg. Prepared
A chair characterized in that the armrest body and the attached portion are integrally formed so as to be bent in a dogleg shape in a side view. The chair according to claim 1, wherein a pipe material having a diameter of 13.1 mm to 15 mm is applied. The chair according to claim 1 or 2, wherein the armrest of the armrest main body has an armrest surface inclined forward relative to a horizontal plane over the entire upper surface of the armrest. The chair according to claim 1, 2 or 3, wherein a rear end of the seat receiver is located behind a position where the rear leg and the seat receiver intersect in a side view.

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