JP3843431B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair that can be lifted up and overlapped in the front-rear direction.
[0002]
[Prior art]
Various chairs are known in which the seat is flipped up and overlapped in the front-rear direction (for example, Patent Document 1). When this type of chair is piled up, the back of the seat and the lifting mechanism etc. can be seen from the outside, so that the appearance is not good, and the seat for placing the seat in the seating position There was also a risk of fingers being caught between the seats. In a theater chair, the flip-up mechanism is concealed inside, but the mechanism is complicated, cannot be easily assembled, and the separation process at the time of disposal is troublesome. In addition, many types of chairs that overlap in the front-rear direction have poor cushioning properties.
[0003]
[Patent Document 1]
JP 2000-50995 A (FIGS. 1 to 6)
[0004]
[Problems to be solved by the invention]
The problem to be solved by the present invention is that in a chair that can be lifted up and overlapped in the front-rear direction, when the seat is lifted up, the back surface of the seat or the lifting mechanism does not appear on the outer surface, and the structure of the lifting mechanism is simple It is possible to provide a chair that can be easily assembled with no danger of pinching fingers and the like, and can be easily separated at the time of disposal. Also, in the above chair, a chair having a cushioning seating feeling is provided. Is to provide.
[0005]
[Means for Solving the Problems]
According to the present invention, the seat has the seat back cover that covers the lower surface side of the seat, the seat is fixed to the upper surface of the seat bracket that is rotatably provided on the seat stay, and the seat rotates to the seating position. A stopper is provided on the seat stay so as to prevent the seat bracket from rotating when moved, and a latching portion is formed at an end of the seat bracket and the inner surface of the seat back cover is opposed to the latching portion. A chair is provided, the hook portion of the seat back cover is engaged with the hook portion, the lower surface of the seat stay is covered, and the seat back cover is mounted on the lower surface side of the seat. In addition, an armrest frame formed in series above the seat stay and a chair with a back plate attached to the back frame via an elastic member are provided, and the above-mentioned problems are solved.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
1 to 3 show an embodiment of the present invention, in which a chair frame (1) has front legs (3), (3) and rear legs (4), (4) having casters (2) at the lower end. The front leg (3) and the rear leg (4) extend obliquely upward so as to cross each other at the substantially central part, and are connected (5) at the central part. The connecting part (5) Is provided with a seat stay (6) connecting the legs on both sides. The distance between the front legs (3) and (3) is wider than the outer dimensions of the rear legs (4) and (4) so that the rear legs (4) and (4) can be inserted in the front-rear direction. Further, a short seat frame (7) extending forward is formed in series at the upper end of the rear leg (4), and an upright frame (8) rising upward is provided at the tip of the seat frame (7). The upper end of the standing frame (8) is bent rearward to be connected to the armrest frame (9), and the left and right armrest frames (9) are connected in series by the back frame (10).
[0007]
A seat bracket (11) is rotatably attached to the seat stay (6). The seat (12) is fixed to the upper surface of the seat bracket (11), and the lower surface of the seat is attached to the lower surface side. A seat back cover (13) is attached as described below.
[0008]
The seat bracket (11) can be formed in various shapes such as an L-shaped cross section and a rectangular shape in cross section, but preferably a seat receiving portion (14) in contact with the seat (12) and the seat receiving portion (14 ) Are formed in a substantially U-shaped cross section having side walls (15), (15) extending downward from both side edges, and the side walls (15), (15) are connected to the seat stay (6). A bearing groove (16) opening downward is formed so as to be movably fitted. Referring to FIG. 4, mounting holes (19) and (20) through which mounting screws (17) and (18) are inserted are formed in the seat receiving portion (14), and nuts (21 The seat (12) and the seat bracket (11) are fixed by screwing the mounting screws (17), (18) onto the bracket.
[0009]
A rotation receiving bracket (22) having a substantially U-shaped cross section is fitted on the lower surface side of the seat receiving bracket (11) so as to sandwich the seat stay (6). Bearing grooves (24) are formed in the side wall portions (23), (23) of the rotation receiving bracket (22) so as to be fitted to the seat stay (6), and the side wall portions (23), (23 ) Are fixed to the side wall portions (15), (15) of the seat bracket (11) with a set screw (25). A part of the seat receiving portion (14) of the seat receiving bracket (11) is cut into an appropriate shape to form a bearing groove that opens upward, and the seat receiving bracket is fitted from the lower surface side of the seat stay (6). If they are combined, the rotation receiving bracket can be omitted (not shown).
[0010]
The seat stay (6) is provided with a stopper (26) for preventing the seat receiving bracket (11) from rotating when the seat (12) is rotated to the seating position. The stopper (26) can be projected in a substantially bar shape or the like at an appropriate position of the seat stay (6). However, as shown in FIG. ) Between the side wall portions (15) and (15), and is fixed to the front side of the seat stay (6) by welding or the like so that the lower surface of the seat receiving portion (14) abuts at the seating position. With this configuration, the stopper (26) can be housed in the seat bracket (11), which is safe, and at the same time, the seat bracket (11) can be positioned, and when the seat (12) is rotated. The seat receiving bracket (11) can be prevented from moving laterally along the seat stay (6) and can be operated reliably.
[0011]
The front or rear end of the seat bracket (11), in the embodiment shown in the figure, the front end is formed by cutting out a part of the side wall (15), (15) (27) The seat back cover (13) has hooking portions (28) and (28) facing the hooking portion (27). The seat back cover (13) is made of a synthetic resin material such as polypropylene and is formed in a shell shape that bends downward in an arc shape, and has a substantially central portion inwardly recessed to form a handle portion (29). The hooks (28), (28) are formed in a state of being opened rearward (30) on both sides of the hand hook (29). The hooking portion (27) can also be provided on the rear end side of the seat bracket (11). In that case, the hooking portion (28) may be provided at the corresponding position by opening it forward. . In addition, a latching portion having an appropriate structure may be formed on the front end side and the rear end side of the seat bracket, and the hooking portions may be provided on the front and rear sides to be engaged with each of the latching portions (not shown). ).
[0012]
A receiving groove (32) is formed in the side surface portion (31) of the seat back cover (13) so as to fit into the seat stay (6), and a mounting hole for the seat receiving bracket (11). A mounting cylinder (33) is formed at a position corresponding to (20) and protrudes toward the inner surface. The mounting cylinder (33) has a large diameter part (34) and a small diameter part (35), and when the mounting screw (18) is inserted, the head of the screw enters the large diameter part (34) and the seat back cover It is made not to protrude to the lower surface side.
[0013]
Thus, to assemble the seat, as shown in FIG. 5, the bearing groove (16) of the seat bracket (11) is fitted into the seat stay (6), and the rotary bracket (22 ) And the rotation receiving bracket (22) is fixed to the seat receiving bracket (11) with screws (25). Next, the screw (17) is inserted into the mounting hole (19) in front of the seat bracket (11) to fix the seat (12), and the hook (28) of the seat back cover (13) is seated. The bracket (11) is engaged with the latching portion (27) and the receiving groove (32) is fitted into the seat stay (6). Finally, the mounting screw (18) is inserted into the mounting cylinder (33), The seat (12) may be screwed to the seat (12) through the mounting hole (20) of the seat bracket (11). In addition, it can be easily disassembled by performing the procedure reverse to that described above.
[0014]
An armrest frame (9) of the frame (1) and a back plate (36) having a shape along the back frame (10) are provided. The back plate (36) is formed of a synthetic resin material such as polypropylene, and mounting bosses (39) are provided on the back surface of the back surface portion (37) and the armrest portion (38) as shown in FIG. The mounting boss (39) is screwed with a nut (41) in which locking pieces (40)... Are threaded on the outer periphery (FIG. 7). Then, a substantially cylindrical elastic member (42) is formed of an elastic material such as polypropylene elastomer, and is fitted to the mounting boss (39) so that the base end side of the elastic member (42) contacts the back plate. The end face is brought into contact with the armrest frame (9) and the back frame (10), and the mounting screw (43) is passed through the mounting holes (44) provided in the armrest frame (9) and the back frame (10). Screwed onto the nut (41). With such a configuration, when the seat plate leans against the back plate (36), the armrest frame (9), the back frame (10), the back plate (36), and the elastic member (42) are elastically bent. Therefore, a moderate cushioning action is obtained, and the sitting comfort is good.
[0015]
When the seat (12) is unfolded and the seat bracket (11) is rotated to a position where it comes into contact with the stopper (26), the seat (12) is maintained in the seated position as shown in FIG. it can. When not in use, if the seat (12) is flipped up, a plurality of chairs can be stacked in the front-rear direction as shown in FIG.
[0016]
【The invention's effect】
The present invention is configured as described above, and the seat bracket is rotatably fitted to the seat stay, the seat is fixed to the upper surface of the seat bracket, and the latching portion formed at the end of the seat bracket is Since the hook of the back cover is engaged and the lower surface of the seat stay is covered and the back cover is attached to the lower surface of the seat, when the seat is lifted, the back of the seat and the lifting mechanism are external In addition, the appearance is good, and when the seat is rotated to the seating position, the seat receiving bracket existing in the seat back cover stops against the stopper, and the seat can be held in the seating position. There is no fear that a finger or the like is sandwiched between the placing portion and the like for placing the seat as in the prior art, and it is safe.
[0017]
In addition, the seat back cover is easy to install, the number of parts is small, and the structure of the seat bracket is simple, so it is economically obtained, easy to assemble and disassemble, and can be easily separated and discarded. You can also.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view.
FIG. 3 is an exploded perspective view.
FIG. 4 is an explanatory diagram mainly showing a seat portion.
FIG. 5 is an explanatory diagram showing an assembly order.
FIG. 6 is an exploded perspective view of a back portion.
FIG. 7 is an enlarged cross-sectional view of a part of the back portion.
FIG. 8 is an explanatory diagram showing a storage state.
[Explanation of symbols]
1 ... Frame 6 ... Seat stay 9 ... Armrest frame
10 ... back frame
11 ... Seat bracket
12 ... za
13 ... Back seat cover
22 ... Rotation bracket
26 ... Stopper
27 ... Hook
28 ... Hook
29 ... Hand part
33 ... Mounting cylinder
36 ... Backboard
39… Mounting boss
42 ... Elastic member

Claims (3)

Front legs with casters at the lower end and rear legs on both sides, the front legs and rear legs extend diagonally upward and connected at the center, and a seat stay is provided between the connecting parts, A seat frame that extends forward is formed, an upright frame that rises upward is provided at the tip of the seat frame, an upper end of the upright frame is bent backward to form an armrest, and the left and right armrests are connected by a back frame. And a frame formed such that the distance between the front legs is wider than the outer dimension of the rear legs,
Pivotally attached to the seat stay of the frame, having a side wall portion from both side edges of the seat receiving the said seat receiving portion extending to face downward, and the seat support bracket forming a hook portion on the end portion ,
A seat attached to a seat receiving portion of the seat bracket;
A stopper fixed to the front side of the seat stay located between the side wall portions so as to contact the lower surface of the seat receiving portion of the seat receiving bracket when the seat rotates to the seating position ;
It has a hook portion and a mounting cylinder that are formed in a shell shape that bends in an arc and has an opening on the inner surface so as to engage with the hook portion of the seat bracket. The hook portion is connected to the hook portion. A seat back cover that engages and covers the lower surface of the seat stay, is mounted on the lower surface side of the seat, and is screwed into the seat via the seat receiving bracket by inserting a screw into the mounting cylinder;
The frame is formed in a shape along the armrest and the back frame, and has a mounting boss with a nut screwed to the back surface, and an elastic member is fitted to the mounting boss, and the armrest and the back frame are attached with mounting screws. A chair with a screwed backboard . The chair according to claim 1 , wherein a rotation receiving bracket is provided on a lower surface side of the seat receiving bracket so as to sandwich the seat stay. The chair according to claim 1 or 2 , wherein the seat back cover has a handle portion recessed inward.

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