JP4948880B2 - Chair armrest equipment - Google Patents

Description

  The present invention relates to an armrest device for a chair in which a pad member is mounted on an upper surface of an elbow rest substrate.

As a conventional armrest device of this type of chair, the pad member is formed by a core material made of a hard synthetic resin material that is a rectangle that is long in the front-rear direction, and a cover material made of a soft synthetic resin material that covers the upper surface thereof, Some core materials are provided with a large number of small holes that are oblong or elliptical in the front-rear direction (see, for example, Patent Document 1).
In this conventional armrest device, a large number of small holes in the core material are regularly arranged in a plurality of rows at equal intervals in the left-right direction and in the front-rear direction, and the thickness of the cover material is substantially uniform. Therefore, the pad member bends almost uniformly at any part.
JP 2005-131238 A

  However, when the pad member has an elongated trapezoidal shape in plan view in which the width gradually expands forward or backward, the arrangement of a large number of small holes is arranged in a plurality of orderly manner as in the conventional one described above. If the flexibility of the pad member is made uniform, the wide part will be greatly deflected compared to the narrow part, and it will be easy to come off from the elbow rest substrate, and the seated person will put his elbow on the pad member. The feeling when placed is different between the front part and the rear part, and there is a possibility of giving an uncomfortable feeling.

  In the present invention, in view of the above-described problems of the prior art, when the planar shape of the pad member is, for example, an elongated trapezoidal shape having a different width in the front-rear direction, a wide portion becomes easily bent excessively. The pad member can be easily detached from the elbow pad, and the feeling when the seated person puts the elbow on the pad member is different between the wide part and the narrow part. An object of the present invention is to provide an armrest device for a chair that can prevent the armchair and has a good feel when armrests.

According to the present invention, the above problem is solved as follows.
(1) In a chair armrest device in which a pad member is mounted on the upper surface of an elbow rest substrate, the pad member has an elongated trapezoidal shape in which the lateral shape gradually increases from one end to the other end in the front-rear direction. Formed by a hard core material and a soft cover material covering the upper surface thereof, and the core material is provided with a large number of small holes from the one end to the other end with an arrangement in which the aperture ratio gradually decreases , Further, a part of the cover material is caused to enter each small hole .

(2) In a chair armrest device in which a pad member is mounted on the upper surface of an elbow rest substrate, the pad member has an elongated trapezoidal shape in which a planar shape gradually increases in width from one end to the other end in the front-rear direction. Formed by a hard core material and a soft cover material covering the upper surface thereof, and the core material is provided with a large number of small holes from the one end to the other end with an arrangement in which the aperture ratio gradually decreases , Furthermore, each said small hole is made into the shape which at least one part expands toward the downward direction, and a covering material is made to approach into this expanded part.

(3) In the above item (1) or (2) , a concave portion that opens downward is provided at the center of the outer covering material that has entered each small hole.

(4) In any one of the above items (1) to (3) , the arrangement of a large number of small holes in the core material is gradually increased from dense to coarse from one end to the other end of the core material.

(5) In any one of the above items (1) to (4) , the opening area of each small hole is gradually reduced from one end to the other end of the core member.

(6) In any one of the above items (1) to (5) , each small hole is formed into an oval or an ellipse that is long in the front-rear direction, and the length is gradually reduced from one end to the other end of the core. To do.

(7) In any one of the above items (1) to (6) , the small holes are arranged in a plurality of rows substantially in the longitudinal direction of the core material, and the interval between adjacent rows is the core material. Gradually expand from one end to the other.

(8) In the above item (7) , the arrangement of the small holes in the adjacent rows is staggered.

According to the present invention, the following effects can be achieved.
In both the invention of the above (1) and the invention of the above (2) , the arrangement of a large number of small holes provided in the core material is arranged from one end to the other end in the longitudinal direction of the core material where the lateral width gradually increases. Since the aperture ratio is gradually decreased, the rigidity of the wide portion of the core material is higher than the rigidity of the narrow portion.
Therefore, even when the planar shape of the pad member is an elongated trapezoidal shape, the wide portion is likely to be excessively bent as in the conventional case, the pad member is easily detached from the elbow pad, or the seated person puts the elbow on the pad member. It is possible to provide a chair armrest device for a chair that can be prevented from giving an uncomfortable feeling because the feeling when placed is different between the wide width portion and the narrow width portion.

Further, according to the invention of the above item (1), since a part of the cover material is made to enter each small hole, it is possible to prevent the cover material from peeling from the core material.

According to the invention of the above item (2), each small hole has a shape that at least partially expands downward, and the cover material is made to enter the expanded portion. It becomes difficult to peel.

According to the invention of the above item (3) , since the recessed portion that opens downward is provided in the center portion of the facing material that has entered each small hole, the material cost of the facing material can be reduced. It is possible to reduce the weight.

According to the invention of the above (4), the arrangement of a large number of small holes in the core material is gradually increased from dense to coarse from one end to the other end of the core material, and thereby according to the invention of the above (5). And by gradually reducing the opening area of each small hole from one end to the other end of the core material, and according to the invention of the above (6) , each small hole is formed into an oval shape elongated in the front-rear direction or By making it oval and gradually decreasing its length from one end of the core material to the other end, the opening ratio of the core material can be reduced gradually from one end to the other end, respectively. Can be manufactured easily.

According to the invention of the above (7) , the small holes are arranged in a plurality of rows substantially facing the longitudinal direction of the core material, and the intervals between adjacent rows are gradually increased from one end to the other end of the core material. Since it is designed to expand, small holes can be placed in the core in a well-balanced manner, and the rigidity of the core can be increased smoothly from the narrow part to the wide part, eliminating the sense of incongruity due to changes in rigidity. be able to.

According to the invention of the above (8) , each small hole is an oval or an ellipse whose major axis faces the direction of each row, and the arrangement of the small holes in the rows adjacent to each other is staggered. The bending in the left-right direction is uniform, and there is no possibility that a portion that is difficult to be bent in the left-right direction locally is generated, for example, in the case of a lattice arrangement.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 is a side view of an armrest device according to an embodiment, FIG. 2 is an end view of a cutting section taken along line II-II of FIG. 1, FIG. 3 is a perspective view of an elbow rest substrate viewed from obliquely above, and FIG. FIG. 5 is a perspective view of the pad member viewed obliquely from below, and FIG. 6 is an enlarged vertical sectional view taken along the line VI-VI in FIG.

  The armrest device (1) for a chair according to the present embodiment has a predetermined space on the upper surface of an elbow rest base plate (2) that has a long and narrow trapezoidal shape whose plane width gradually increases from the front end to the rear end. A pad member (4) to be attached in the form of (3), the pad member (4) having a plate-like core material (5) made of a hard synthetic resin material that can be elastically deformed moderately, and a surface thereof; And a cover material (6) made of a soft synthetic resin material.

  The elbow rest substrate (2) and the pad member (4) may be formed in an elongated trapezoidal shape that is substantially in the front-rear direction in which the lateral width gradually increases from the rear end to the front end by reversing the above shape.

  An upper edge piece (10) is provided on the outer peripheral edge of the elbow rest substrate (2), and on the inner side of the elbow rest substrate (2), a shape similar to that of the elbow rest substrate (2) is formed via an upward concave groove (9). A standing piece (8) is provided. The standing piece (8) is provided with a plurality of engagement holes (7).

  An engagement claw (11) that is externally fitted to the upright piece (8) and engages with the engagement hole (7) protrudes slightly inside the outer peripheral edge of the lower surface of the core member (5). The provided downward piece (12) is projected. The outer peripheral surface and the lower surface of the downward piece (12) are covered with the cover material (6), and the lower end portion of the cover material (6) covering the lower surface of the downward piece (12) is the upward edge. The piece (10) is fitted in the upward concave groove (9).

The core material (5) is preferably formed of, for example, polypropylene or polyethylene having moderate elasticity, and the cover material ( 6 ) is formed of, for example, polyurethane or polyester-based elastomer having flexibility and elasticity. .

  The portion without the engaging claw (11) in the downward piece (12) of the core (5) is formed thin. For this reason, it is possible to reduce the material and reduce the weight without reducing the bonding strength between the elbow rest substrate (2) and the pad member (4).

  The engaging hole (7) in the standing piece (8) of the elbow pad (2) and the engaging claw (11) of the core member (5) engaged therewith are long in the horizontal direction. The bond strength between the elbow pad (2) and the core material (5) is increased.

  A vertical perforated boss (13) that fits a support shaft provided at the upper end of an armrest strut (not shown) is formed at the center in the left-right direction of the rear part of the elbow rest substrate (2), and a perforated boss ( Centering on 13), radially upward ribs (14) are provided on the bottom wall of the elbow rest substrate (2).

  As shown in FIG. 2, the upper end of the upward rib (14) is normally separated from the lower surface of the core (5), but when the pad member (4) is elastically bent downward during armresting. The core member (5) is in contact with the pad member (4) to prevent further bending of the pad member (4).

On the upper surface of the core material (5), a row of a plurality of small holes (15) facing in the front-rear direction for enhancing the flexibility of the core material (5), the interval between adjacent ones is determined as the core material (5 ) Gradually increases from the front part to the rear part, in other words, from the narrow front end part to the wide rear end part, it is provided in an arrangement that gradually increases from dense.
Thus, the core material (5) is arranged so that the arrangement of the numerous small holes (15) in the core material (5) gradually becomes denser from the front to the rear of the core material (5). The aperture ratio is gradually decreased from the front to the rear.

  Each small hole (15) is preferably an oval or an ellipse whose major axis is substantially in the front-rear direction, and the arrangement of the small holes (15) in rows adjacent to each other is preferably staggered.

  As shown in FIG. 6, the front and rear end faces of each small hole (15) have a shape that expands downward, and a portion of the soft cover material (6) is inserted into the expanded portion. The outer covering material (6) can be prevented from peeling from the core material (5).

  Moreover, the material cost of the cover material (6) can be reduced by providing a recessed portion (16) that expands downward in the center of the cover material (6) inserted into each small hole (15). While being able to reduce, weight reduction can be achieved.

When the core material (5) and the cover material (6) are insert-molded, the concave portion (16) has a large number of concave portions (16) for forming the concave portion (16) on the upper surface as shown by a two-dot chain line in FIG. The core material (5) is placed on the lower mold (18) provided with the protrusion (17), and the synthetic resin material for forming the cover material (6) is guided to the upper surface of the core material (5). The portion can be easily formed by filling the space between the inner surface of the small hole (15) of the core member (5) and the surface of the protrusion (17) of the lower die (18). .
It should be noted that the entire inside of the small hole (15) may be filled with a part of the cover material (6).

  Since the armrest device of the present embodiment is configured as described above, it is not necessary to use screws for mounting the armrest substrate (2) and the pad member (4), and the number of parts can be reduced. Assemblability is improved.

  In addition, screw attachments such as a boss part and a female screw part that hinder the elastic deformation of the pad member (4) are provided at the corners of the space formed inside the elbow pad (2) and the pad member (4). Therefore, the pad member (4) can be elastically deformed uniformly over almost the entire area.

Furthermore, the arrangement of a large number of small holes (15) provided in the core material (5) is gradually increased from dense to coarse from one end to the other end in the longitudinal direction of the core material (5) whose lateral width gradually increases. As a result, the opening ratio of the core material (5) is gradually decreased from one end to the other, so that the rigidity of the wide portion of the core material (5) is higher than the rigidity of the narrow portion. .
Therefore, even if the planar shape of the pad member (4) is an elongated trapezoidal shape, the wide portion is likely to be excessively bent as in the prior art, and the pad member (4) is likely to be detached from the elbow rest substrate (2). The chair feels better when it is placed on the arm, because it feels different when the occupant puts his elbow on the pad member (4) between the wide part and the narrow part. An armrest device (1) can be provided.

As mentioned above, although embodiment of this invention was explained in full detail with drawing, a specific structure is not restricted to this embodiment, A design change etc. are possible in the range which does not deviate from a claim.
In the above embodiment, the arrangement of the numerous small holes (15) in the core material (5) is gradually increased from dense to rough from one end to the other end of the core material (5), so that the core material (5 ) Is gradually reduced from one end to the other. For example, the length of each small hole (15) that is elongated in the front-rear direction or the ellipse is set to one end of the core (5). The opening ratio of the core material (5) is gradually decreased from one end to the other end by gradually decreasing from one end to the other end, or each small hole (20) is circular as shown in FIG. In addition, the diameter, that is, the opening area is gradually reduced from one end of the core member (5) to the other end, so that the opening ratio of the core member (5), that is, the average opening area is changed from one end to the other end. In the meantime, it can be gradually decreased.

It is a side view of the armrest device of one embodiment of the present invention. It is the II-II line | wire cutting part end elevation of FIG. It is the perspective view which looked at the elbow board | substrate from diagonally upward. FIG. 4 is an end view taken along line IV-IV in FIG. 3. It is the perspective view which looked at the pad member from diagonally downward. FIG. 6 is an enlarged vertical sectional view taken along line VI-VI in FIG. 5. It is a bottom view of the modification of a core material.

(1) Armrest device
(2) Elbow pad
(3) Space
(4) Pad material
(5) Core material
(6) Surface material
(7) Engagement hole
(8) Standing piece
(9) Upward groove
(10) Upward edge piece
(11) Engaging claw
(12) Downward piece
(13) Perforated boss
(14) Upward rib
(15) Small hole
(16) Recessed part
(17) Projection
(18) Lower mold

Claims (8)

In the armrest device of the chair formed by mounting a pad member on the upper surface of the elbow pad,
The pad member has a planar shape with an elongated trapezoidal shape whose lateral width gradually increases from one end to the other in the front-rear direction, and is formed of a hard core material and a soft surface covering material covering the upper surface, and The core material is provided with a large number of small holes arranged from the one end to the other end so that the aperture ratio gradually decreases , and further, a part of the covering material is inserted into each small hole. Chair armrest device to play. In the armrest device of the chair formed by mounting a pad member on the upper surface of the elbow pad,
The pad member has a planar shape with an elongated trapezoidal shape whose lateral width gradually increases from one end to the other in the front-rear direction, and is formed of a hard core material and a soft surface covering material covering the upper surface, and The core material is provided with a large number of small holes from one end to the other end with an arrangement in which the aperture ratio gradually decreases , and each small hole has a shape that at least partially expands downward, An armrest device for a chair, characterized in that a covering material is made to enter the expanded portion . The armrest device for a chair according to claim 1 or 2, wherein a recessed portion that opens downward is provided at a central portion of the facing material that has entered each small hole. The armrest device for a chair according to any one of claims 1 to 3, wherein an arrangement of a plurality of small holes in the core material is gradually increased from dense to rough from one end to the other end of the core material. The armrest device for a chair according to any one of claims 1 to 4, wherein an opening area of each small hole is gradually reduced from one end of the core member to the other end. The chair armrest device according to any one of claims 1 to 5 , wherein each small hole is formed into an oval or an ellipse that is long in the front-rear direction, and the length is gradually reduced from one end of the core member to the other end. The arrangement of the small holes is a plurality of rows substantially facing the longitudinal direction of the core material, and the interval between adjacent rows gradually expands from one end of the core material to the other end. 7. The armrest device for a chair according to any one of 6 above. The chair armrest device according to claim 7 , wherein the arrangement of the small holes in the rows adjacent to each other is staggered.

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