JP2017086366A - Armrest and chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accoudoir having a good appearance and a low manufacturing cost. SOLUTION: An accoudoir 10 is an accoudoir provided on a chair 1, and is lightened in the left-right direction in a thick portion between a flat upper surface 101A and a flat lower surface 101B, and between the upper surface 101A and the lower surface 101B. A connection between the accoudoir main body 101 provided inside the hole 102 and the lightening hole 102 and having a plurality of left and right ribs 103 extending in the left-right direction, and the frame 23 or the accoudoir strut of the chair 1 and the lower surface 101B. A unit 104 is provided. The chair 1 includes an accoudoir 10 at the upper end of the frame 23. [Selection diagram] Fig. 5

Description

  The present invention relates to an armrest and a chair.

  A so-called meeting chair (hereinafter simply referred to as a chair) used in a conference or the like is often used for a long time, so a chair with an armrest is preferred. On the other hand, such a meeting chair is required to be easily stored. Therefore, it is preferable that stacking is possible in which the chairs are stacked in the upward direction and nesting in which the chairs are stacked in the lateral direction is possible.

  The chair should have a simple structure so that it can be stored by stacking or nesting. In addition, since many are often used, it is necessary to keep the unit price per piece low.

  Many chairs with conventional elbows have an armrest made of a synthetic resin molded product for cost reduction, and many of the armchairs are provided with ribs that are thinned from the lower surface side. Such a thin armrest can reduce the amount of material, but the ribs are exposed on the lower surface, and the appearance and the touch are not good.

  In order to improve the appearance and the touch feeling, the armrest must be composed of a plurality of parts, and these parts must be assembled with screws (for example, Patent Document 1). Therefore, the manufacturing cost has not been sufficiently low even if the meat is removed.

Japanese Patent Laid-Open No. 2003-10002

  The problem to be solved by the present invention is to provide an armrest and a chair that look good by a device that does not cause molding shrinkage (shrinkage) and that are low in manufacturing cost.

  In order to solve the above-mentioned problems, an armrest according to the present invention is an armrest provided on a chair, and is a meat that is flattened in a horizontal direction at a flat upper surface, a flat lower surface, and a thickness portion between the upper surface and the lower surface. An armrest main body having a plurality of left and right ribs extending in the left-right direction, and a connecting portion for connecting the frame or armrest strut of the chair and the lower surface are provided.

  According to the present invention, there is an effect that it is possible to provide an armrest having a good appearance and low manufacturing cost.

The perspective view of a chair. The front view of a chair. The top view of a chair. The right view of a chair. The perspective view of a right armrest. A right side view of the right armrest. Left side view of the right armrest. The bottom view of the right armrest. The rear view of the right armrest. AA line sectional view of an armrest main-body part in FIG. BB sectional drawing in FIG. 9 of the armrest main-body part concerning an application example. The right view of the armrest which illustrated protrusion.

  Hereinafter, an armrest 10 and a chair 1 according to an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of the chair 1, FIG. 2 is a front view of the chair 1, FIG. 3 is a plan view of the chair 1, and FIG.

  As shown in FIGS. 1 to 4, the chair 1 includes a seat 28, a frame 23, a backrest 21, an armrest 10, a rear leg 25 </ b> B, and a front leg 25 </ b> A.

  The seat portion 28 has a cushion on the upper surface. The frame 23 rotatably supports the seat portion 28 from both side surfaces of the seat portion 28. A front leg portion 25 </ b> A is attached to the lower end of the frame 23 in the floor surface direction. A seat support 26 is bridged between the upper ends of the pair of front legs 25A. The seat support part 26 restricts the rotation of the seat part 28 in the floor direction in the sitting position.

  The frame 23 further has a rear leg 25B attached to the lower side of the upper end. The frame 23 has a crank portion that is bent in the center direction, which is the seat portion direction, below the attachment portion of the seat portion 28. Accordingly, the outer width of the pair of front legs 25A is narrower than the width of the pair of rear legs 25B. The front leg 25A of the other chair 1 can be inserted between the pair of rear legs 25B, and nesting is possible. A bumper 24 formed of a flexible resin is installed in the crank portion. Therefore, the impact during nesting can be reduced and the chair 1 can be guided to an appropriate position. The casters 27 are attached to the floor direction end portions of the front leg portion 25A and the rear leg portion 25B.

  A backrest 21 is installed on the upper side of the upper end of the frame 23 via a backrest support portion 22. The backrest 21 is formed of resin, for example, and is provided with a plurality of holes. (In the drawings other than FIG. 1, this hole portion is not shown.) The upper end portion of the rear leg portion 25 </ b> B extends inside the backrest support portion 22.

  The armrest 10 is installed on the frame 23 through the back support 22. The armrest 10 has a length in the front-rear direction (hereinafter simply referred to as the front-rear direction) when seated is approximately ½ of the length in the front-rear direction of the seat portion 28. Therefore, when nesting is performed, the armrests 10 do not interfere with each other.

  5 is a perspective view of the right armrest 10, FIG. 6 is a right side view of the right armrest 10, FIG. 7 is a left side view of the right armrest 10, FIG. 8 is a bottom view of the right armrest 10, and FIG. It is a rear view of the armrest 10 of FIG. Since the left and right armrests 10 are symmetrical, only the right armrest 10 will be described below.

  As shown in FIGS. 5 to 9, the armrest 10 includes an armrest main body 101 having a flat upper surface 101A and a flat lower surface 101B. The armrest main body 101 is shaped to draw an arc that is slightly convex upward. The front end portion of the armrest main body portion 101 is slightly higher than the rear end portion of the armrest main body portion 101 from the floor surface. A connecting portion 104 connected to the backrest support portion 22 is provided on the lower surface of the armrest main body portion 101. The connecting portion 104 has a protrusion 107 (see FIG. 12), but the illustration of the protrusion 107 is omitted except for FIG.

  The armrest main body 101 has a through-hole 102 that is a hollow hole penetrating in the left-right direction (hereinafter simply referred to as the left-right direction) when seated in the thickness portion between the upper surface 101A and the lower surface 101B. Further, the armrest main body 101 has a plurality of left and right ribs 103 extending in the left-right direction inside the through hole 102. There is enough space in the cutout hole to prevent shrinkage in the thickness direction.

  The armrest main body 101 can be formed using, for example, a resin such as nylon containing glass fiber as a forming material. Since the armrest main body part 101 has the through-hole 102, the usage-amount of a forming material can be reduced, manufacturing cost can be restrained low and a weight can also be made light.

  The left and right ribs 103 are installed at a predetermined interval and have a thickness that is thinner than the thickness of the armrest main body 101. Since the width of the left and right ribs 103 is slightly shorter than the width of the armrest main body 101, it is not visually recognized when seated.

  Since the armrest main body portion 101 has left and right ribs in the through hole 102, it is possible to obtain necessary rigidity.

  As shown in FIG. 8, the connecting portion 104 has a so-called funnel shape that covers an area of more than half of the lower surface 101 </ b> B of the armrest main body portion 101 and the inner diameter becomes narrower toward the lower end. Therefore, the weight applied to the armrest main body 101 can be released to the lower end of the connecting portion 104.

  When the armrest main body 101 and the connecting portion 104 are integrally formed of the same material, manufacturability is good in terms of manufacturing cost, shortening of time required for manufacturing, and the like. On the other hand, if there is a portion where the thickness is increased in the integrally formed armrest, cooling shrinkage of the resin, that is, so-called “shrinkage” tends to occur in the portion where the thickness is present. Therefore, in the present embodiment, the armrest main body 101 is provided with a left-right thinning (through hole 102).

  Thereby, the upper side of the through-hole 102, that is, the upper surface 101A of the armrest main body 101 becomes thin, so that it is possible to avoid the occurrence of “shrunk”. Since the upper surface 101A of the armrest main body 101 constitutes the top surface of the armrest 10 and is easily visible from the outside, the appearance and the touch can be improved by avoiding “shrinking”.

  On the other hand, the lower side of the through hole 102, that is, the lower surface 101 </ b> B of the armrest main body 101 is integrally continuous with the connecting portion 104, so that the thickness is inevitably increased and “shrunk” occurs. However, the “shrinkage” that occurs in this case occurs inside the through hole 102 and is not visually recognized from the outside. Therefore, the appearance and feel of the armrest 10 can be improved.

  That is, by setting the through hole 102 of the armrest main body 101 to such a height that the “shrinkage” generated in the through hole 102 (upper side of the lower surface 101B) cannot be seen from the left and right directions, The touch can be improved.

  In addition, since at least the armrest main body 101 and the connecting portion 104 of the armrest 10 are integrally formed, the number of parts is also reduced, which is desirable in terms of reducing the manufacturing cost.

  10 is a cross-sectional view taken along line AA of the armrest main body 101 in FIG. 9, and FIG. 11 is a cross-sectional view taken along line BB in FIG. 9 of the armrest main body 101 according to the application example.

  In the embodiment shown in FIG. 10, the through hole 102 penetrates in the left-right direction. Such a through hole 102 is preferably formed by removing the mold core in any one of the left and right directions when molding the armrest main body 101, but is not limited thereto, and each of the left and right directions is formed during molding. You may make it pull a core from.

  In the application example shown in FIG. 11, the armrest main body 101 has front and rear ribs 105 extending in the front and rear direction inside the through hole 102. In this case, the through-hole 102 becomes a lightening hole 106 that does not penetrate in the left-right direction, and the armrest 10 has a front and rear rib 105 between the upper surface 101A and the lower surface 101B inside the lightening hole 106.

  Such a through-hole 102 is suitably formed by removing the core from each of the left and right directions in a state where the left and right cores do not contact each other when the armrest main body 101 is formed. At this time, if the cores in the left and right directions are close to each other, the thickness of the upper surface 101A of the armrest main body 101 is not so thick that the front and rear ribs 105 are "shrunk". It is possible to improve the appearance and feel of the top of the armrest 10.

  By providing the front and rear ribs 105, the load resistance is further increased.

  FIG. 12 is a right side view of the armrest 10 illustrating the protrusion 107. As shown in FIG. 12, the armrest 10 has a protrusion 107 having a width narrower than the width of the connection portion 104 at the lower end of the connection portion 104.

  A nut 108 threaded inward is integrally formed on the protrusion 107. The backrest support portion 22 has a bolt hole at a position corresponding to the nut 108, and the armrest 10 is fixed to the chair 1 by inserting a bolt into the bolt hole and the nut 108 and tightening the bolt.

  The armrest 10 of the present embodiment can be applied not only to a meeting chair but also to an armchair of an office chair where the armrest cannot move. The office chair includes armrest posts that support the armrests on both sides of the seat. The armrest 10 is installed at the upper end of the armrest support. Needless to say, the armrest 10 may be an armrest having an up-and-down lifting mechanism (that is, an armrest strut that moves up and down).

  As described above, the chair 1 of the present embodiment has an armrest main body 101 having a through hole 102 that is thinned in the left and right direction and a left and right rib 103 that is provided inside the through hole 102 and extends in the left and right direction. Is provided.

  Therefore, there is an effect that it is possible to provide a chair that has the armrest 10 that has good appearance and good touch, and that is low in manufacturing cost.

DESCRIPTION OF SYMBOLS 1 Chair 10 Armrest 22 Backrest support part 23 Frame 24 Bumper 25A Front leg part 25B Back leg part 26 Seat part support part 27 Caster 28 106 Meat hole 107 Projection 108 Nut

Claims (7)

An armrest on the chair,
A flat upper surface and a flat lower surface, a thickness hole between the upper surface and the lower surface in a left-right direction, and a plurality of left and right ribs extending in the left-right direction. An armrest body having,
An armrest comprising a connecting portion that connects a frame or armrest column of the chair and the lower surface. The said hollow hole is
The armrest according to claim 1, wherein the armrest is a through-hole penetrating in the left-right direction. The connecting portion is
The armrest according to claim 1, wherein the armrest is formed integrally with the same material as the armrest main body portion and has a left-right direction hollowing hole having a sufficient space to prevent shrinkage in the thickness direction.   The armrest according to claim 1, wherein front and rear ribs extending in the front-rear direction are provided inside the hollow hole.   The armrest according to any one of claims 1 to 4, wherein the armrest is formed of nylon containing glass fiber. A seat,
A frame that rotatably supports the seat from the left-right direction;
A front leg and a rear leg attached to the lower end of the frame;
A backrest installed on the upper end of the frame via a backrest support;
The armrest according to any one of claims 1 to 5, wherein the armrest is installed on an upper end portion of the frame via a back support portion.
A chair equipped with. The frame is
The chair according to claim 6, further comprising a crank portion that installs the front leg portion such that an outer width of the pair of front leg portions is narrower than a width of the pair of rear leg portions.

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