JP6687996B2 - Chair and support frame - Google Patents

Description

  The present invention relates to a chair including a pair of left and right legs and a seat.

  2. Description of the Related Art Conventionally, as a chair used in a hall or the like, there is known a chair capable of nesting, in which seats are stacked in the front-rear direction in a state of being flipped up in order to reduce a storage space when not in use. ing.

  In this type of chair, not only can it be compactly housed in the nesting state, but also in order to ensure sufficient strength as a chair, the pair of left and right legs are connected by a frame at their upper ends. It is common to position the seat body with this frame (see Patent Documents 1 and 2).

JP-A-2005-279032 JP-A-2005-218534

Further, it is preferable that the chair capable of flipping up the seat body secures strength when seated.
An object of the present disclosure is to suitably secure the strength of a chair when seated.

In order to solve the above problems, a first configuration (claim 1) includes a pair of left and right legs, and a support frame that connects the pair of left and right legs, and the support frame extends in the left-right direction. A frame main body having a cross-sectional shape that extends and is longer than a second direction orthogonal to the first direction with respect to the first direction, and a left side region of the frame main body; A backrest supporting piece extending from each of the right side regions and supporting a backrest, the leg portion includes a front leg extending forward from the frame body, and a rear leg extending rearward from the frame body. It is a chair characterized by including.

  Further, the chair configured as described above includes a seat body that is rotatably fixed about an axis that extends in the left-right direction, and the back surface of the seat body projects from the back surface and comes into contact with the support frame. A positioning member that positions the seat body so that it can be seated may be provided.
  Further, the chair configured as described above may be configured such that the first direction is substantially the front-back direction.

  In the chair having the above structure, the front leg may extend from the front end of the frame body, and the rear leg may extend from the rear end of the frame body.
  Further, the chair configured as described above may be configured such that the front leg extends from a position closer to the center portion of the frame body than the rear leg.

  In the chair having the above structure, the left and right end surfaces of the frame body, the left and right outer surfaces of the backrest support piece, and the left and right outer surfaces of the rear legs that are connected to the frame body have a left-right direction. It may be configured to be located on the same plane as the line direction.

A second configuration of the present disclosure is a support frame used in a chair having a pair of left and right legs, the support frame extending in the left-right direction to connect the pair of left and right legs, and A frame main body whose cross-sectional shape by a plane whose normal direction is the left-right direction is longer than a second direction orthogonal to the first direction with respect to the first direction, and extends from each of the left and right sides of the frame main body to form a backrest. And a backrest supporting piece for supporting, wherein the leg portion includes a front leg extending forward from the frame main body and a rear leg extending rearward from the frame main body. .
A third configuration of the present disclosure is a seat body support mechanism that supports a seat body, the seat body support mechanism includes a pair of left and right support portions, and each of the left and right pair of support portions is the seat body. A first portion provided with a shaft body for rotatably fixing the first portion, a second portion extending inward from a lower end of the first portion, and a floor direction oblique from the second portion below an edge of the seat body. And a third part extending downward and forward, the third part being a front leg.
The seat body support mechanism may include a pair of rear legs that extend from each of the pair of left and right support portions and that are installed with a wider space than the front legs.
Further, in the seat body support mechanism, the left and right outer end surfaces of each of the pair of left and right support portions and the left and right outer surface of the portion of the rear leg that is connected to the support portion may be located on the same plane. Good.

Six-sided view showing the overall structure of the chair (left side view is omitted) AA sectional view in the front view Perspective view showing characteristic parts of chair The perspective view which shows the characteristic part of the chair in another embodiment. Diagram showing how multiple chairs are nested The perspective view which shows the characteristic part of the chair in another embodiment. Front view of essential parts showing a characteristic portion of a chair in another embodiment The right side view of the principal part which shows the frame of the seat in another embodiment.

Hereinafter, modes for carrying out the present invention will be described with reference to the drawings.
(1) Configuration As shown in FIG. 1, the chair 1 includes a backrest 10, a seat 20, a pair of left and right leg portions 30 and 40, and a support frame 50 that connects the leg portions 30 and 40 in the left-right direction. It is a nesting chair that is equipped with the same chair 1 and can be stored (so-called nesting) in the front-back direction.

  The backrest 10 is formed into a shape that follows the back of the seated person as a whole by making the plate-shaped member an arcuate shape that is convex toward the rear in a plan view, and is rearward from the upper end side. A strip-shaped strip 11 extending toward the front side, and a pair of back-side coupling pieces 13 that extend downward from the lower ends on both left and right sides and are coupled to the support frame 50 are provided.

Of these, the strip-shaped piece 11 is composed of a portion extending rearward from each of the left and right end sides of the upper end of the backrest 10 and a strip-shaped portion that connects the respective portions in the left-right direction, whereby the upper end of the backrest 10 is formed. A horizontally long space surrounded by the strip 11 is formed. This strip 11
The strip-shaped part in is used as a handle when the chair 1 is moved. The band-shaped piece 11 is not limited to this structure, and may be composed of only a band-shaped portion, as shown in FIG. 4A, and may have a structure in which a horizontally long space is not formed.

  Further, the pair of back side connecting pieces 13 are arranged in a positional relationship of sandwiching the rear end side of the seat body 20 from the left and right, and as shown in FIG. 2, the seat body 20 is centered on a shaft body 15 extending in the left and right direction. It is fixed so that it can rotate. As a result, when the seat body 20 is tilted down so that the seating surface is a surface along the ground (FIG. 3A), the seat body 20 is flipped up so that the seating surface intersects the ground. It becomes possible to rotate between the housed state (FIG. 3B) and the housed state.

  The backrest 10 is supported by the support frame 50 above the seat body 20. As a result, as shown in FIG. 3C, the backrest 10 has a horizontally long shape surrounded by the rear end of the seat body 20 and the lower end of the backrest 10. A space is formed.

  The seat body 20 has a sheet-shaped member 23, which is a seating surface, attached to an area surrounded by a rectangular frame body 21 in a plan view. In the present embodiment, as shown in FIG. 2, in the frame 21, the front frame 21a and the back frame 21b are stacked in the front-back direction, and the sheet-like member 23 is attached to the front frame 21a to form the back frame. A positioning member 100 described later is provided on the body 21b. The seat body 20 is an inclined surface having an upward slope from the rear end portion to the front end portion (see the right side view), and the front end portion is a hanging piece that hangs downward.

  The seat body 20 has a pair of seat side fixings for fixing the seat body 20 to the backrest 10 at positions (left and right sides on the rear end side) corresponding to the pair of back side connecting pieces 13 of the backrest 10. A piece 25 is provided, and by fixing it through the shaft body 15 described above, the entire seat body 20 can be rotated with respect to the backrest 10 (see FIGS. 3A and 3B).

  In addition, a pair of positioning members 100 for positioning the seat body 20 in a seatable state are provided on the back surfaces of the left piece and the right piece that extend forward and backward on the left and right sides of the frame body 21 of the seat body 20. ing.

  The positioning member 100 projects from the back surface of the seat 20, and in the present embodiment, has a shape in which the width in the front-rear direction narrows toward the tip in the side view (trapezoid in the present embodiment). The amount of protrusion from the seat body 20 contacts the support frame 50 with the lower end of the sheet member 23 above the upper end of the support frame 50 when the sheet member 23 is deformed when seated on the seat body 20. It is set to have a positional relationship with. In the present embodiment, the positioning member 100 projects from the back surface of the seat body 20 so as to incline toward the inside in the left-right direction, and the positioning member 100 and the support frame 50 are located inside the left and right outer surfaces of the seat body 20. Contact (see front view of FIG. 1).

  Here, as shown in FIG. 2, it is assumed that the anterior-posterior position of the seat body 20 corresponding to the ischial tuberosity of the occupant (that is, the position along the anteroposterior direction in which the ischial tuberous tube of the occupant is supposed to be located) is the reference position a. Then, the positioning member 100 includes a set of projecting pieces 101 projecting from the front and rear ends of a predetermined region b that extends in the front-rear direction on the back surface of the frame body 21 including the reference position a, and the projecting pieces 101 at their respective front ends. The connecting piece 103 is connected on the side, and the seat 20 is positioned by the connecting piece 103 coming into contact with the support frame 50. Here, the positioning member 100 is not limited to the configuration including a set of the protruding piece 101 and the connecting piece 103, and for example, as shown in FIG. 4B, the entire predetermined area b on the back surface of the frame body 21. It may be formed as a protrusion protruding over.

Further, each of the positioning members 100 has one end (
The other end (connecting piece 103) from the connecting piece 103) is connected by a reinforcing frame 105 extending in the left-right direction. The reinforcing frame 105 has a configuration in which the positioning members 100 are connected only at the front and rear ends thereof, but the configuration is not limited to this, and as shown in FIG. 4C, a plate-shaped member is used for positioning. The front end of the member 100 may be connected over the entire width in the front-rear direction, or may not be provided as shown in FIG. 6B.

The leg portions 30 and 40 include front legs 31 and 41 that are provided so as to extend obliquely forward from the lower portions of the end portions of the support frame 50, and end portions that are outside the front legs 31 and 41 of the support frame 50. The rear legs 33 and 43 are provided so as to extend obliquely rearward from the lower portion, and the casters 35 and 45 are provided at the lower ends of the legs. The chair 1 may be configured without the casters 35 and 45.

  The leg members 30 and 40 are formed such that the distance between the leg members 30 and 40 is wider on the left and right sides on the rear leg 33, 43 side than on the front leg 31, 41 side, so that the chairs 1 having the same shape can be stacked in the front-rear direction. I am configuring.

  The support frame 50 includes a plate-shaped frame main body 51 that extends in the left-right direction, and a pair of support-side connection pieces 53 that extend upward from the upper parts of the left and right ends of the frame main body 51 and that are connected to the backrest 10. , Are provided. As shown in FIG. 2, in the frame main body 51, the upper surface as a member serves as a contact region with the positioning member 100, and reaches a position where the front end surface of the positioning member 100 overlaps with a line extending along the front end surface in a side view. , The front end as a member has arrived.

The front end of the frame main body 51 is a curved surface that is inclined downward (semi-circular in side view in this embodiment), and the convex portion 107 formed at the tip of the positioning member 100 fits therein. It is configured.

In the chair 1 having the above-described structure, the seat body 20 is flipped up so that the seating surface of the seat body 20 is a surface that intersects with the ground, so that the seat body 20 can be stacked in the front-rear direction as shown in FIG. As a result, the storage space when not in use can be reduced.
(2) Modifications The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the technical scope of the present invention. Needless to say.

For example, in the above-described embodiment, a configuration is adopted in which the frame main body 51 of the support frame 50 is a plate-shaped member that extends in the left-right direction. However, the frame main body 51 is not limited to this configuration, and may be , for example, a columnar one extending in the left-right direction as shown in FIG.

  In this configuration, considering that the positioning member 100 is easily elastically deformed along the curved outer peripheral surface of the frame body 51, a line obtained by extending the front end surface of the positioning member 100 along the front end surface in a side view is shown. It may have a front-rear width that allows the front end of the member to reach a certain distance behind the overlapping position.

Further, in the above-described embodiment, the contact region between the support frame 50 and the positioning member 100 may have the following configuration from the viewpoint of positioning the seat 20 and ensuring the strength of the chair 1. Specifically, as shown in FIG. 7, an inner restricting piece 55 that restricts the displacement of the positioning member 100 inward in the left-right direction in a region of the support frame 50 adjacent to the contact region with the positioning member 100. Alternatively, an outer restricting piece 57 for restricting the positioning member 100 from being displaced outward in the left-right direction is provided.

  Here, a protrusion is formed on the support frame 50 side, the outer side in the left-right direction of this protrusion functions as the inner regulation piece 55, and the inner side in the left-right direction functions as the outer regulation piece 57, and these regulation pieces 55 on the positioning member 100 side. , 57, the positioning hole 109 is formed so as to come into contact with the support frame 50 at the tip of the protrusion. However, the inner restricting piece 55 and the outer restricting piece 57 may be formed as separate members, and the restricting pieces 55 and 57 are arranged on the outer side and the inner side of the positioning member 100 in the left-right direction, respectively. May be

Further, in the above-described embodiment, the positioning member 100 has a trapezoidal shape in which the width in the front-rear direction is narrowed linearly toward the tip in a side view. However, the positioning member 100 may have a shape other than the trapezoidal shape as long as the width in the front-rear direction becomes narrower toward the tip in a side view. Specifically, as shown in FIG. 8, it is conceivable that the width in the front-rear direction is curvilinearly narrowed toward the tip in a side view.
(3) Actions and Effects With the chair 1 configured as described above, the seat 1 is seated on the seat 20 in spite of the structure in which the load is received by the support frame 50 disposed directly below the seat 20. Even if the sheet-shaped member 23 is deformed, the lower end of the sheet-shaped member 23 does not come into contact with the support frame 50, and the deformation of the sheet-shaped member 23 associated with seating is not prevented. Therefore, with the above structure, it is possible to suitably improve the sitting comfort of the chair 1 while ensuring compactness in the nesting state.

  Further, in the chair 1 having the above-described configuration, the front-back position corresponding to the ischial tuberosity of the seated person, that is, the position along the front-back direction where the seated-bone tube of the seated person is supposed to be located is the center of gravity position of the seated person in the front-back direction. Therefore, at least the back surface of the frame body 21 in the seat body 20 can receive the load in the region b extending in the front-rear direction with this position as the reference position a, so that the strength of the chair 1 when seated can be ensured. Is effective to do. In this respect, in the above configuration, since the positioning member 100 can receive the load in the region b where the seat body 20 can be the center of gravity of the seated person, the strength of the chair 1 when seated can be appropriately secured. it can.

  In addition, when the positioning member 100 is composed of the pair of projecting pieces 101 and the connecting piece 103, elastic deformation can easily occur due to this frame-shaped structure, so that the load exceeds the load in the seated state. By having a design that elastically deforms only under the load, it is possible to have a function of absorbing a large load generated when sitting.

Further, in the above-described configuration, the strength of the chair 1 when seated can be further improved by connecting the positioning members 100 to each other by the reinforcing frame 105.
Further, in the above configuration, since the positioning member 100 contacts the support frame 50 at a position inside the left and right outer side surfaces of the seat body 20, a certain distance is ensured to this contact area, and as a result, the fingertips of the occupant are seated. It is possible to prevent such a situation that something is stuck.

Further, if the support frame 50 is provided with the inner regulation piece 55 and the outer regulation piece 57, the regulation pieces 55 and 57 of the support frame 50 are arranged in the area adjacent to the contact area with the positioning member 100, and both of them. Since the positional relationship is clear, the user can reliably and easily position the seat body 20 in a seatable state.

  Further, in the configuration in which the inner side regulation piece 55 is formed, even if the positioning member 100 is displaced inward in the left-right direction by the load when seated, this displacement is regulated by the inner side regulation piece 55. It is possible to further improve the strength when seated as 1.

  Further, in the configuration in which the outer restricting piece 57 is formed, the displacement is restricted by the outer restricting piece 57 even when the positioning member 100 is displaced outward in the left-right direction due to a large load such as when seated. Unintentional deformation due to such a load can be prevented.

  DESCRIPTION OF SYMBOLS 1 ... Chair, 10 ... Backrest, 11 ... Belt-shaped piece, 13 ... Backside connection piece, 15 ... Shaft body, 20 ... Seat body, 21 ... Frame body, 21a ... Front side frame body, 21b ... Back side frame body, 23 ... Sheet -Shaped member, 25 ... Seating side fixing piece, 30 ... Leg part, 31 ... Front leg, 33 ... Rear leg, 35 ... Caster, 40 ... Leg part, 41 ... Front leg, 43 ... Rear leg, 45 ... Castor, 50 ... Support frame , 51 ... Frame main body, 53 ... Support side connecting piece, 55 ... Inner regulating piece, 57 ... Outer regulating piece, 100 ... Positioning member, 101 ... Projecting piece, 103 ... Connecting piece, 105 ... Reinforcing frame, 107 ... Convex portion, 109 ... Positioning hole.

Claims (5)

A pair of left and right legs,
A support frame connecting the pair of left and right legs,
A seat body that is fixed so as to be rotatable about an axis extending in the left-right direction,
The support frame is
Extend in the horizontal direction and in the cross-sectional shape by a plane in the lateral direction of the portion extending in the left and right direction as the normal direction, and long one of the frame body than the front-rear direction is a vertical direction,
A backrest support piece that extends from each of the left side region and the right side region of the frame body and supports a backrest;
The leg portions are front legs and rear legs provided in the left side region and the right side region of the frame main body, respectively, and the front leg extending forward from a portion of the frame main body extending in the left and right direction and the left and right direction. Of the portion, the front leg includes a rear leg extending rearward from a position different from the left and right direction,
A chair is provided on the back surface of the seat body, and is provided with a positioning member for positioning the seat body in a seatable state by contacting the support frame. The chair according to claim 1, wherein the front leg extends from a front end of the frame body, and the rear leg extends from a rear end of the frame body. The chair according to claim 1 or 2, wherein the front leg extends from a position closer to the central portion of the frame body than the rear leg. The left and right end surfaces of the frame body, the left and right outer surfaces of the backrest support piece, and the left and right outer surfaces of the rear legs that are connected to the frame body are the same plane with the left-right direction as the normal direction. The chair according to any one of claims 1 to 3, which is located above. A support frame used in a chair having a pair of left and right legs and a seat body rotatably fixed about an axis extending in the left-right direction,
The support frame is
Extends in the left-right direction connecting the left and right pair of leg portions, and, in the cross-sectional shape by a plane in the lateral direction of the portion extending in the left and right direction as the normal direction, the long one of the frame body than the front-rear direction is the vertical direction When,
A backrest support piece that extends from each of the left and right sides of the frame body and supports a backrest,
The leg portions are front legs and rear legs provided in the left side region and the right side region of the frame main body, respectively, and the front leg extending forward from a portion of the frame main body extending in the left and right direction and the left and right direction. Of the portion, the front leg includes a rear leg extending rearward from a position different from the left and right direction,
The frame body is configured to support the seat body in a seatable state from below.

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