JPS6161804B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chair in which a seat body whose seat part and seat back part are integrally molded from synthetic resin is attached to legs made of pipe material. The object of the present invention is to allow a seat back part, which becomes a backrest part, to move in the vertical direction according to the sitting posture of the user when the user sits on the seat part of the seat body, and to fit the structure to the user's back.

An embodiment of the present invention will be described below with reference to the drawings. The chair according to the present invention shown in FIG. 1 is shown in FIG. It is completed by assembling the seat body 40. The leg body S is composed of a main leg body 10 formed by bending a pipe material of a predetermined length, and a seat body 20 formed by bending a pipe material of a predetermined length into a U-shape. is formed,
A spring means 30 is attached to each rear leg portion 13 of the main leg body 10, respectively. The seat body 40 is formed by integrally molding a seat portion 41 and a seat back portion 42 from, for example, glass fiber reinforced plastic, and a recess 45 is formed in the center from the upper end of the seat back portion 42 to the front end of the seat portion 41. A cushion member 46 is fixed in this recess 45 by fitting. Cushion member 46
is integrally molded from sponge rubber such as urethane rubber, and has a non-porous skin formed on its surface.

Next, the structure of each part of the leg body S mentioned above will be explained in detail with reference to FIG. Each pair of front leg portions 11, 11 and bottom leg portions 12, 1 are integrally formed by being bent to
2, rear leg parts 13, 13, and a back rest part 14 extending upward from each rear leg part 13, and a pivot member 15 shown in FIG. The cylindrical portion 15a is inserted and fixed by the caulking 11b. In such a case, the distance between each side portion 14b, 14b of the backrest portion 14 (i.e., the distance between both rear leg portions 1
3 and 13) is wider than the width of the recess 45 of the seat body 40, as can be easily understood from FIG. The seat body 20 has each arm portion 21
Each pivot member 1 provided on the pair of front leg parts 11, 11
5, each arm portion 2
The swing end 21a of the main leg 10 is connected to a spring means 30 and assembled to the main leg 10. Thus, each arm portion 21 of the seat body 20 is connected to the support portion 15 of each pivot member 15.
It is supported so as to be able to swing around b as a fulcrum. Note that the main leg body 10 is fixed to the floor surface by appropriate means (not shown) at each bottom leg portion 12 thereof.

As shown in FIG. 6, the spring means 30 includes a pair of upper and lower brackets 31 and 32 fixed to the rear leg portion 13 of the main leg body 10, and a swinging end portion of the arm portion 21 of the seat body 20 through the upper bracket 31. The swinging end 21a is provided with a guide pin 33 slidably inserted through the swinging end 21a, and the swinging end 21a is elastically supported by a coil spring 34 via a member 22 fixed to both upper and lower surfaces of the swinging end 21a. In this case, each swinging end 21a is formed into a flat shape so as to match the lower edge of each arm 21, as shown in FIGS. 2, 4A, 4B, and 6, and the member 22 is fixed to. The coil spring 34 is attached by locking its upper end to the shoulder 22a of the member 22 and locking its lower end to the upper surface of the lower bracket 32, and the guide pin 33 connects its stepped lower end 33a to the collar 36. The lower bracket 32 is inserted through the lower bracket 32 and is prevented from coming out by a snap spring 35.

Therefore, in this embodiment, when assembling the seat body 40 configured as described above to the leg body S, as shown in FIG.
An interference prevention member 24 is fixed to the front end 23 of the
An interference prevention member 17 is fixed to a, and interference prevention members 16,
16 is fixed. Thus, the front end curved portion 41a of the seat body 40 shown in FIG. 3 is rotatably assembled to the front end portion 23 of the seat body 20 shown in FIG. 2 via the interference prevention member 24, and the seat body is assembled. 20, the interference prevention members 25, 25
In addition, the back support portion 14 of the main leg body 10 supports both sides of the back surface of the seat back portion 42 via the interference prevention members 16, 16, 17, and furthermore, the center of the back surface of the seat back portion 42 As shown in FIG. 1, a cover 44 is fixed to the upper part to cover the upper end 14a of the back rest 14 of the main leg body 10, thereby completing the chair according to this embodiment. In this case, the upper end 14a of the backrest 14 is movable in the vertical direction by a notch 44a provided in the cover 44.

When the chair of this embodiment configured as described above is installed in a vehicle, for example, and a passenger is not seated on the chair, the seat main body 40 of the chair is in the position shown in FIG. 4A. In such a case, the lower surface of the seat portion 41 is separated from the upper end of the spring means 30 by an appropriate distance depending on the thickness of the arm portion 21 and the thickness of the interference prevention members 24 and 25 while the member 22 is engaged with the bracket 31. It is located above.

By the way, when a passenger sits on this chair, due to the weight of the passenger, both arms 21, 21 of the seat body 20 move in the direction of the arrow in FIG. Each arm portion 21 is tilted against the coil spring 34 of each spring means 30.
The downward movement of the swing end 21a is restricted by the balance between the passenger's weight and the elastic force of each coil spring 34. As a result, in the seat main body 40, as described above, the lower surface of the seat portion 41 is located above the upper end of each spring means 30 by an appropriate distance, so that the seat portion 41 can be moved as shown in FIG. 4B. In response to the tilting of each arm 21, the seat body 20 sinks downward about the front end 23 of the seat body 20, and the seat back 42 moves toward the backrest 1 of the main object 10.
4, the cover 44 moves downward to comfortably accommodate the waist and back of a seated passenger.

Furthermore, if the floor of the vehicle vibrates while the passenger is seated in this manner, this vibration is absorbed by each coil spring 34 located at the lower rear of the seat portion 41 of the seat body 40. .

In this embodiment, both arm portions 2 of the seat body 20 are connected at the upper ends of both front leg portions 11, 11 of the main leg body 10.
1 and 21 has been described, an example in which the pivot member 15 shown in FIG. 5 is used as a means for supporting May be implemented.
That is, in the support member 150 shown in FIG. 7, both arm portions 21, 21 of the seat body 20 are swingably supported by support pins 152 fixed horizontally to both arm portions 151, 151, respectively. Further, in the support member 250 shown in FIG. 8, both arm portions 21, 21 of the seat body 20 are swingably supported by a ball joint 251 attached to the upper end thereof.

As described above, in the present invention, as exemplified in the above embodiment, both arm portions of the seat body 20 are
1 and 21 in a swingable manner, and both arm parts 21,
The swinging end portions 21a, 21a of the main leg body 10 are elastically supported by spring means 30, 30 attached to the rear leg portions 13, 13 of the main leg body 10, and the leg body S constructed in this manner
A seat main body 40 in which a seat part 41 and a seat back part 42 are integrally formed from synthetic resin is attached to the seat body 40, so that when both arm parts 21, 21 of the seat body 20 are tilted up and down, the seat main body 40 is attached to the seat part 41. Its structural feature is that it rotates around the front end curved part 41a and its seat back part 42 can move up and down.This makes it possible to improve sitting comfort by using the seat body integrally molded from synthetic resin. A good chair can be provided with a simple configuration.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a chair according to the present invention, FIG. 2 is a perspective view of a leg forming a part of the present invention, FIG. 3 is an exploded perspective view of the seat body and cushion member, and FIG. 5 and 4B are longitudinal sectional side views for explaining the function of the chair shown in FIG.
The figure is an enlarged partial cutaway view of the pivot member that connects the arm of the seat body to the upper end of the front leg of the main leg body shown in FIG.
FIG. 6 is an enlarged sectional view taken along line 6--6 in FIG. 2. 7 and 8 show modifications of the pivot member shown in FIG. 5. Explanation of symbols, 10... Main leg body, 11... Front leg part, 12... Bottom leg part, 13... Rear leg part, 14...
Backrest part, 20... Seat body, 21... Arm part, 21a
... Swinging end portion, 23 ... Front end portion, 40 ... Seat main body, 41 ... Seat portion, 41a ... Front end curved portion, 42 ... Seat back portion.

Claims (1)

[Claims] 1 A pipe material of a predetermined length is bent into a U shape, and each free end thereof is bent parallel to each other into a substantially U shape to form each pair of front legs, bottom legs, and rear legs, and each pair of back legs. The main leg is integrally formed with a backrest extending upward from the legs, and a pipe material of a predetermined length is bent into a U-shape to form an intermediate portion between the arms. A seat body is connected and supported in a swingable manner at the upper end of each of the front legs, and a seat body is attached to each rear leg of the main leg body so that each swinging end of both arms of the seat body is elastically supported from below. The seat body includes a spring means for resiliently supporting, and a seat body having a seat portion and a seat back portion integrally formed of synthetic resin and being received by the back support portion of the main leg body and the seat body, The front end of the seat part forming the seat body is rotatably connected to the front end of the seat body, and the back part of the seat back part is supported vertically movably by the back rest part of the main leg body. chair.