JP4855594B2 - Chair shell structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair in which a synthetic resin shell is attached to a leg frame, and more particularly to a structure of the shell.
[0002]
[Prior art]
A typical conventional chair is composed of a synthetic resin shell in which a seat portion and a backrest portion are integrally formed, and a leg frame formed by bending a pipe, and the back side of the seat portion in the shell. Is placed on the surface of the connecting rod of the metal plate material that connects the left and right upper flange portions of the leg frame, and the seat portion is fixed to the connecting rod by an appropriate fixing means.
[0003]
[Problems to be solved by the invention]
However, in the chair as described above, the edge of the connecting rod is exposed from the back side of the shell, so that it does not look good and does not adversely affect the design of the chair. When handling, there is a problem that fingers, nails, etc. of the hand touch the edge of the connecting rod and the touch is not good.
[0004]
The present invention provides a shell structure for a chair that prevents fingers, nails, and the like from touching the edge of a connecting rod without causing an increase in parts in view of the above-described problems of the conventional technology. It is aimed.
[0005]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) In a shell structure of a chair in which a synthetic resin shell is attached to a leg frame, the back side of the shell is brought into contact with the surface of a plate-like connecting rod connecting left and right frame members in the leg frame And a pair of detachable front and rear locking portions that can be engaged with the lower surface side of the front and rear edges of the connecting rod, along the edge of the connecting rod, and on the back surface of the shell. providing a ridge which protrude higher than the thickness of the edge.
[0006]
(2) In the above item (1), a plurality of raised portions are provided at intervals along the edge of the connecting rod.
[0007]
(3) In the above item (2), each raised portion is shaped like a plate that faces in a direction substantially perpendicular to the connecting rod.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is an exploded perspective view of a chair provided with an embodiment of the present invention, FIG. 2 is a side view of the same, FIG. 3 is a plan view of the same, and FIG. Show.
[0009]
The chair (1) includes a leg frame (2) that forms a framework of the chair body, a side-view forward L-shaped synthetic resin shell (3) attached to the leg frame (2), and a shell (3). The seat cushion (4) and the backrest cushion (5) stretched on the surface of the seat.
[0010]
The leg frame (2) is installed horizontally in the left-right direction between a pair of left and right frame members (6), (6) forming the legs of the chair (1) and the frame members (6, 6). The front and rear connecting rods (7) and (8) are formed.
[0011]
The frame member (6) consists of front and rear legs (6a) and (6b) that are formed by bending a metal round pipe material into a substantially square shape when viewed from the side, and the upper ends of the front legs (6a). The upper collar part (6c) extending horizontally from the rear leg part (6b) to the front leg part (6a) and the rear leg part (6b) are connected at the lower end, and the lower collar part placed on the floor ( 6d).
[0012]
The rear end of the upper collar part (6c) is bent upward at the intersection with the rear leg part (6b) and overlaps with the rear leg part (6b) to form a connecting part (6e) extending upward. ing.
[0013]
As shown in FIG. 8, the front connecting rod (7) is formed by bending a metal plate material into a substantially rearwardly expanded V shape when viewed from the side, and a screw (9) A pair of left and right through holes (7a) into which (9) can be inserted are provided, and both end portions are joined to the corner portions of the front leg portion (6a) and the upper collar portion (6c) by welding.
[0014]
As shown in FIG. 7, the rear connecting rod (8) is formed by bending a metal plate, and the longitudinal section is formed at the upper ends of the flat upward U-shaped base (8a) at the front and rear ends. The front and rear flanges (8b) and (8b) are facing to each other, and both ends are joined to the rear portions of the upper flange portions (6c) and (6c) of the frame members (6) and (6) by welding. .
[0015]
The shell (3) is formed by injection molding a synthetic resin material, and the backrest (10) and the seat (11) are integrally formed.
[0016]
The backrest portion (10) has a cylindrical portion (10a) in the vertical direction at the lower portions on the left and right sides, open at the bottom, and capable of fitting the connecting portion (6e) of the frame member (6) from below. An opening (12) that is long in the left-right direction is provided at the center of the lower portion, and is connected to the rear end of the seat (11) with connecting portions (10b) on both sides of the opening (12).
[0017]
The opening (12) is provided in order to ensure the design viewpoint of the chair (1), the breathability to the waist of the seated person, the appropriate deflection of the backrest (10), etc. As shown mainly in FIG. 6, a flange (13) facing rearward for reinforcement is provided on the periphery.
[0018]
On the surface side of the backrest part (10), the outer peripheral edge of the backrest cushion (5) and the cloth (14) covering the backrest cushion (5) is fitted with the vertical and horizontal cores (15). (16) is provided along the upper edge, both side edges, and the upper side of the opening (12) of the backrest (10).
[0019]
Similarly, as shown in FIG. 6, a substantially forward U-shaped protrusion (17) that protrudes backward corresponding to the groove (16) is provided on the rear surface side.
[0020]
Between the upper flange (13) in the opening (12) and the ridge (17) provided along the flange (13), as shown mainly in FIG. It is connected by a plurality of ribs (18) facing in the vertical direction for reinforcement.
[0021]
The seat portion (11) is placed on the front and rear connecting rods (7) and (8), and on the rear surface thereof, a pair of left and right screw holes (11a) into which screws (9) are screwed, and the front A direction provided along the rear edge of the connecting rod (7) and the edge of the front and rear flanges (8b) of the rear connecting rod (8) and substantially perpendicular to the front and rear connecting rods (7) and (8). A plurality of L-plate-shaped ridges (19) and (21) facing the front and a pair of front and rear locking portions (20) that can be engaged with and disengaged from the front and rear flanges (8b) of the rear connecting rod (8). ing.
[0022]
The pair of front and rear locking portions (20) face in the front-rear direction and can elastically deform in the front-rear direction in the vicinity of the edges of the front and rear flanges (8b) in the rear connecting rod (8) as shown in FIG. In this manner, the rear end side of the seat portion (11) is placed on the upper surface of the rear connecting rod (8), so that the opposite end portions are engaged with the lower surface side of the front and rear flanges (8b). Match.
[0023]
In the state where the seat portion (11) is placed on the upper surfaces of the front and rear connecting rods (7) and (8), the raised portion (19) projects downward from the plate thickness surface at the rear end of the front connecting rod (7). And along the rear edge of the front connecting rod (7) at a predetermined interval (S). Further, the raised portion (21) protrudes downward from the plate thickness surface at the edge of each flange (8b) in the rear connecting rod (8), and at the edge of each flange (8b) with a predetermined interval (S). Formed along.
[0024]
The interval (S) in the raised portions (19) and (21) is formed to be narrower than at least the width of the finger of the hand. This prevents fingers and nails from touching the end edges of the front and rear connecting rods (7) and (8). Further, the surface side of the seat portion (11) corresponding to the raised portions (19) and (21) is formed flat.
[0025]
On the surface of the seat (11), the outer periphery of the cushion for seat (4) and the inner shell (22) made of synthetic resin placed between the seat (11) and the cushion for seat (4) Are provided along the front edge, both side edges, and the lower side of the opening (12) of the seat (11). Similarly, as shown in FIG. 6, a protrusion (24) having a substantially U-shaped cross section is provided on the rear surface so as to protrude downward corresponding to the groove (23).
[0026]
In order to reinforce the flange (13), as shown in FIG. 6, between the lower flange (13) in the opening (12) and the protrusion (24) provided along the flange (13). Are connected by a plurality of ribs (25).
[0027]
When assembling the chair (1), the connecting part (6e) of the leg frame (2) is inserted into each cylindrical part (10a) of the backrest part (10) of the shell (3), and the entire shell (3) is inserted. Is pressed downward to place the back surface side of the seat (11) on the upper surfaces of the front and rear connecting rods (7) and (8). As a result, each locking portion (20) abuts against the front and rear flanges (8b) of the rear connecting rod (8) and is once expanded, and with its restoring force, it is applied to the lower surface of each flange (8b). Engage.
[0028]
Next, the screw (9) is inserted into the through hole (7a) of the front connecting rod (7) from below and screwed into the screw hole (11a) of the seat portion (11), so that the seat portion (11) is inserted. The front part is fastened to the front connecting rod (7).
[0029]
As described above, the shell (3) can be easily attached to the leg frame (2). Further, the seat (11) of the shell (3) is placed on the front and rear connecting rods (7) and (8) and is fixed by the respective locking portions (20) and screws (9), so that it is stable. In the state, it is attached to the leg frame (2).
[0030]
When the shell (3) is attached to the leg frame (2), the raised portions (19) and (21) of the seat portion (11) are connected to the front and rear connecting rods (7) and (8) at intervals (S). And protrudes from each edge. Therefore, when handling the chair (1) with the back side of the seat (11), fingers, nails, etc. of the hand do not come into contact with the edges of the connecting rods (7), (8). ) Can be handled safely.
[0031]
When disassembling the chair (1), the screws (9) were removed and the locking portions (20) were detached from the flanges (8b) of the rear connecting rod (8) against the elastic force. Thereafter, the shell (3) can be easily removed from the leg frame (2) by pulling out the cylindrical portion (10a) of the backrest (10) from the connecting portion (6e) of the leg frame (2).
[0032]
【The invention's effect】
According to the present invention, the following effects can be achieved.
(A) According to the first aspect of the present invention, it is possible to prevent a hand, a finger, etc. from contacting the edge of the connecting rod in the leg frame with a simple configuration without increasing the number of parts such as a cover covering the connecting rod. Can do.
[0033]
(B) According to the invention described in claim 2, it is possible to suppress the occurrence of dents and sink marks on the surface side of the shell, and to make the shell look good. Moreover, it can be set as the chair of an excellent design by making a protruding part into one accent in the design of a chair.
[0034]
(C) According to the invention described in claim 3, the reinforcing effect of the back surface of the shell is enhanced, the occurrence of material sink is prevented, and the design of the back surface of the shell can be made unique.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a chair provided with an embodiment of the present invention.
FIG. 2 is a side view of the chair.
FIG. 3 is also a plan view of the chair.
FIG. 4 is a perspective view of the chair as seen from the rear and obliquely below.
5 is an enlarged view of a portion A in FIG. 4 similarly. FIG.
6 is a longitudinal sectional view taken along line VI-VI in FIG.
7 is an enlarged longitudinal sectional view taken along line VII-VII in FIG.
8 is an enlarged longitudinal sectional view taken along line VIII-VIII in FIG.
[Explanation of symbols]
(1) Chair
(2) Leg frame
(3) Shell
(4) Seat cushion
(5) Back cushion
(6) Frame member
(6a) Front leg
(6b) Rear leg
(6c) Upper collar
(6d) Lower arm
(6e) Connecting part
(7) Previous connecting rod
(7a) Through hole
(8) Back connection
(8a) Base
(8b) Flange
(9) Screw
(10) Backrest
(10a) Cylindrical part
(10b) Connection part
(11) Seat
(11a) Screw hole
(12) Opening
(13) Flange
(14) Cloth
(15) Heartwood
(16) Groove
(17) Projections
(18) Rib
(19) Raised part
(20) Locking part
(21) Raised part
(22) Inner shell
(23) Groove
(24) Projections
(25) Rib

Claims (3)

In the shell structure of a chair that is made by attaching a synthetic resin shell to a leg frame,
The back surface side of the shell is brought into contact with the surface of a plate-shaped connecting rod that connects the left and right frame members of the leg frame, and is engaged with the lower surface side of the front and rear edges of the connecting rod on the back surface side of the shell. A chair shell comprising a pair of front and rear locking portions that can be engaged and disengaged , and a raised portion that protrudes along the edge of the connecting rod and that is higher than the plate thickness of the edge of the connecting rod. Construction. The shell structure of the chair according to claim 1, wherein a plurality of raised portions are provided at intervals along an edge of the connecting rod. The shell structure of the chair according to claim 2, wherein each raised portion is formed in a plate shape facing a direction substantially orthogonal to the connecting rod.

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