JP2958208B2 - Chair - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair which can be sequentially stacked along a floor at the time of collection.

[0002]

2. Description of the Related Art A chair of this kind is disclosed in Japanese Patent Application Laid-Open No. Hei 2-19141.
1, since the chairs can be sequentially placed from behind or from the front while the chairs are placed on the floor, there is no need to fold the chairs or lift the chairs and place them on a cart.

[0003]

However, in practical use, of these chairs without rear legs, a stopper structure for restricting the horizontal position when the seating portion is used and the upward rotation position when the seat is collected. There is still room for improvement in such points as strength and cost, and the possibility of inexpensive production without using a mold as much as possible when producing in small quantities.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to secure the strength of a chair without rear legs that can be sequentially stacked while being installed on a floor surface, and to provide a cost advantage.

[0005]

According to the present invention, in order to achieve this object, according to the first aspect, both front legs and both armrests extending rearward from the upper end of the front legs obliquely upward. A frame, a bottom frame on both sides extending so as to be wider or narrower rearward from the lower end of the front leg, and a cross frame crossing between the upper ends of the front legs on both sides,
The front end of the seating portion is supported by the crossing frame so as to be rotatable upward from a horizontal position, and a backrest is attached between the rear ends of the armrest frames on both sides, so that another chair of the same structure can be moved along the floor surface. In a chair that can be stacked one after another, a stopper that supports the seating portion in a horizontal position is provided on both sides of the backside of the seating portion by abutting stopper stoppers formed on the front legs on both sides, and the A spring is provided for urging the seating portion upward, a space is provided between the backrest and the seating portion in the horizontal position, and the backrest is biased by the spring to restrain the seating portion rotated upward. The lower edge is positioned.

According to the second aspect, instead of forming the stopper receivers on the front legs on both sides, the stopper receiver is formed on both sides of the reinforcing frame provided between the upper ends of the front legs on both sides at a position slightly below the transverse frame, and the back surface of the seating portion is formed. A stopper that supports the seat portion in a horizontal position by contacting the stopper receiver may be provided on both sides of the stopper. According to the third aspect, the stopper is preferably provided below a hinge fixed to the back surface of the seating portion so as to rotatably support the front end of the seating portion upward from a horizontal position.

According to a fourth aspect of the present invention, assuming that the end frame of the bottom frame and the laterally intermediate portion of the transverse frame are connected by a reinforcing frame, both ends of the guide rod into which the slider ring is inserted are reinforced by the reinforcing frame. The slider ring is fixed along the frame, a link is interposed between the slider ring and the back surface of the front part of the seating part, and a spring for urging the slider ring upward is loaded between the slider ring and one end of the both ends. By constraining the position,
The lower ends of both ends are positioned at positions where the seating portion is horizontally supported via the link, and a space is provided between the backrest and the seating portion at the horizontal position, and the space is urged by the spring via the link. The lower edge of the backrest is positioned at a position for restraining the seat portion pivoted upward, or instead of restraining the seat portion with the lower edge of the backrest according to claim 5, the rising position of the slider ring is changed. By constraining, the upper ends of both ends can also be positioned at positions where the amount of upward rotation of the seat portion biased by the spring is limited.

[0008]

According to the first aspect, when the chair is not used, the seat portion is urged upward by a spring force and is in contact with the lower edge of the backrest. When the chairs are collected in this state, when the chairs are approached from the front or back along the floor, the bottom frame is on the floor, and the armrest frames are overlapped in the up-down direction so as to be horizontally stacked. When a chair is used, when the user sits on the seat, the seat pivots downward against the spring force, the stopper comes into contact with the stopper receiver, and the seat is supported at a substantially horizontal position.

[0009]

1 to 4 show an embodiment of a chair according to the present invention. In FIG. 1, a frame 10 made of an iron pipe is
The front legs 11 on both sides, the armrest frames 12 on both sides extending diagonally upward from the upper end of the front legs to the rear, and the rear end extending toward the rear from the lower end of the front legs so as to become narrower, and the rear end being the end frame 13a. The closed bottom frames 13 are integrally formed. Between the upper ends of the front legs 11, a cross frame 15 made of an iron pipe, which supports the seating portion 16, is also connected. A backrest 14 is attached to the rear end of the armrest frame 12, and a space 18 is provided between the seating portions 16 so as to allow the seating portion 16 extending rearward from a position below the backrest 14 to rotate. Are formed.

As shown in FIG. 2A, an iron hinge 20 having an iron stopper 25 fixed thereto is screwed to the back surface of both ends of the front portion of the seat portion 16, and as shown in FIG. Lug 2 protruding from the central portion of the transverse frame 15
A coil spring 29 for supporting the rod 28 at the positions 7 and 27a and urging the seat 16 upward is mounted.

That is, as shown in FIG. 3A, the hinge 20 is formed in a plate shape having a semicircular groove 20a in the middle portion corresponding to the shape of the bush 21 set on the transverse frame 15, The four corners are screwed to the core 16 a of the seat 16. The stopper 25 is formed in a plate shape having a horizontally welded portion 25a to be welded to the hinge 20 and a contact portion 25b which is bent substantially vertically downward so as to face the front leg 11 and projects laterally outward. I have. A stopper receiver 26 made of synthetic resin is screwed to a portion of the front leg 11 which is in contact with the contact portion 25b. As shown in FIG. 4B, the stopper receiver has a claw 26a that engages with an engagement hole formed in a side wall of the front leg 11, and is fixed to the front screw hole of the front leg 11 so as to be screwed into the front hole. A screw hole 26c is formed inside the concave portion 26b. On the other hand, the coil spring 29
As shown in FIG. 4, the end portion 29 a linearly extending rearward is formed with a stopper member 29 formed on the core member 16 a of the seat portion 16.
b.

The operation of the chair constructed as described above is as follows. At the time of collection, the chair whose pivoting portion is rotated to the position where the seat portion 16 contacts the lower edge 14a of the backrest 14 is advanced from behind by the urging of the coil spring 29, and the bottom portion becomes narrower rearward. The rear bottom frame 13 is positioned outside the frame 13, and the rear armrest frame 12 is positioned below the armrest frame 12 and overlapped. Less than,
The chairs are sequentially intruded into the front chair from behind and stacked (FIG. 5A).
Similarly, the chairs can be reversed from the front and stacked in order. When the user sits in use, the seat 16 rotates downward due to its weight, and the stopper 25
To support the seat 16 in a substantially horizontal position (FIG. 5B).

FIG. 6 shows another embodiment. A reinforcing frame 15a for reinforcement is added to the front leg 11 of the frame 10 below and parallel to the transverse frame 15, and a stopper receiver 31 made of a synthetic resin is screwed inward of the forward leg 11 in the transverse frame. It has been stopped. That is, the stopper receiver has a base 31a formed with a semicircular groove 31c corresponding to the diameter of the reinforcing frame 15a and formed with screw holes on the upper and lower sides, and does not pinch the hands of the occupant particularly when seated on both sides thereof. With the lateral wall 31b formed as described above, it is integrally formed in a U-shape. On the other hand, an iron plate-shaped stopper 30 is provided below the hinge 20 screwed to the core member 16a above the stopper receiver 31 by welding. Thereby, at the time of seating, the stopper 30 enters between the horizontal walls 31b and abuts on the base 31a, thereby supporting the seating portion 16 at a substantially horizontal position.

In these embodiments, the shape of the bottom frame is opened without connecting the rear ends thereof, so that the bottom frame of the back enters the inside of the bottom frame of the front chair. It is also possible to form as follows.

FIG. 7 shows still another embodiment. The frame 10, the transverse frame 15, and the backrest 14 are configured in the same manner as in the above-described embodiment. Crossing frame 15
A reinforcing frame 40 of an iron pipe is welded in an oblique direction between the center portion of the end frame 13a of the bottom frame 13 and the bottom frame 13. The front ends on both sides of the seating section 16 are supported by hinges 20 on the transverse frame 15 as in the above-described embodiment.

Lugs 41 and 42 are welded to two upper and lower portions of the upper portion of the reinforcing frame 40, and between both ends of the guide rod 43 along the reinforcing frame 40 are welded therebetween. A slider ring 45 is inserted into the guide rod, and a compression spring 47 is loaded between the back surface and the lug 42. The core 16a on the back surface of the front part of the seat 16 has
A bracket 48 is screwed, and both arms 49 functioning as links between the bracket 48 and the slider ring 45 are pivotally supported by pins 49a, respectively. The lug 42 is a seat 1
6 is formed to be thick to oppose the gravitational force at the time of seating, and is positioned to support the seating portion 16 at the horizontal position at the time of seating via a compression spring 47, a slider ring 45, and a substantially vertical arm 49; Functions as a stopper receiver.

When not in use, the compression spring 47 urges the slider ring 45 upward to raise the slider ring 45 so that the rear end of the seat 16 is in contact with the lower edge 14 a of the backrest 14 via the arm 49. At the time of seating, the slider ring 45 descends due to the gravity of the seated person, compressing the compression spring 47, and
To support the seating portion 16 at a substantially horizontal position.
In this case, since the stopper portion occupies a position closer to the inside than the crossing frame 15, there is no possibility that the hand will be caught,
In particular, there is no need to consider safety. Arm 4
Reference numeral 9 is located at the front of the seating portion, and its length is shortened, so that the expansion of the overlapping pitch can be suppressed.

In this embodiment, the position of the lug 41, which is the upper end of the guide rod 43, is set to a position where the slider ring 45 abuts at a predetermined rotational position above the seating portion 16, and the stopper receiving portion is set. When functioning as
Does not need to be brought into contact with the lower edge of the backrest 14, so that the rear dimension can be set to a short dimension that does not interfere with the backrest 14 during rotation.

[0019]

According to the chair with no rear legs according to the first aspect of the present invention, which is sequentially stacked along the floor, the stopper provided on the back surface of the seating portion abuts against the stopper receiver of the front leg, thereby simplifying the operation. In addition, the seating portion can be firmly supported in the horizontal position. By restricting the flip-up position of the seating portion with the backrest, a special stopper is not required. Therefore, a horizontal stutter king chair on the floor surface which is advantageous in strength and cost can be realized. According to the second aspect, the stopper receiver can be formed on a reinforcing frame added to the crossing frame. However, according to the third aspect, if a stopper that comes into contact with the stopper is provided below a hinge supporting the seating portion by welding or the like, the structure is improved. Is made simpler, and the strength is advantageous.

According to the similar chair according to the fourth aspect of the present invention, since the contact position of the stopper for supporting the seat portion in the horizontal position occupies the inside of the front leg, safety is secured with a simple structure. The strength of the stopper can be sufficiently secured with a simple structure by forming the stopper receiver on the reinforcing frame.

According to the similar chair according to the fifth aspect of the present invention, in addition to the advantages of the fourth aspect of the present invention, it is not necessary to make the seating portion abut on the backrest, and the degree of freedom of the shape is increased. .

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair according to an embodiment of the present invention.

FIG. 2 is a perspective view of a hinge and a stopper portion, and FIG. 2B is a perspective view of a spring portion, showing a main part of the chair.

3A and 3B show a detailed structure of the hinge and the stopper portion. FIG. A is a longitudinal sectional view and an exploded perspective view, and FIG. 3B is a transverse sectional view of a stopper receiver.

FIG. 4 is a side view of the stopper portion.

FIGS. 5A and 5B are views for explaining the operation of the chair. FIG. 5A is a side view of main parts when not in use, and FIG. 5B is a side view of main parts when in use.

FIG. 6 is a side view and an exploded perspective view of a hinge and a stopper according to another embodiment.

7A and 7B show a chair according to still another embodiment, wherein FIG. 7A is a perspective view of the chair, and FIG. 7B is a perspective view of a stopper portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Front leg 12 Armrest frame 13 Bottom frame 13a End frame 14 Backrest 15 Crossing frame 15a, 40 Reinforcement frame 16 Seating part 20 Hinge 25, 30 Stopper 29 Coil spring 47 Compression spring 49 Arm

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-159216 (JP, A) JP-A-2-191411 (JP, A) JP-A-3-848 (JP, U) JP-A-3-159 64537 (JP, U) Japanese Utility Model 3-21242 (JP, U) Japanese Utility Model 4-91154 (JP, U) Japanese Utility Model 57-17540 (JP, U) Japanese Utility Model 47-36245 (JP, Y1) (58) Field surveyed (Int. Cl. ⁶ , DB name) A47C 3/04 A47C 7/56

Claims (5)

(57) [Claims] 1. Front legs on both sides, armrest frames on both sides extending diagonally upward from the upper end of the front legs, and both sides extending rearward from the lower end of the front legs so as to become wider or narrower. A bottom frame, and a transverse frame that crosses between the upper ends of the front legs on both sides. The transverse frame supports the front end of the seating portion so as to be rotatable upward from a horizontal position, and the rear ends of the armrest frames on both sides. By attaching backrests between the chairs, another chair of the same structure can be sequentially stacked along the floor. A stopper for supporting the seat portion in a horizontal position is provided below by contact, a spring is provided on the crossing frame to bias the seat portion upward, and a space is provided between the backrest and the seat portion in the horizontal position. Together with A chair provided with a lower edge of the backrest so as to restrain the seating portion which is biased by the spring and turned upward. 2. Instead of forming stopper stoppers on the front legs on both sides, the stopper receivers are formed on both sides of a reinforcing frame provided between the upper ends of the front legs on both sides at a position slightly below the transverse frame,
2. The chair according to claim 1, wherein stoppers are provided on both sides of the back surface of the seating portion to support the seating portion in a horizontal position by contacting the stopper receiver. 3. The hinge according to claim 1, wherein the stopper is provided on a hinge fixed to the rear surface of the seat so as to support the front end of the seat so as to be rotatable upward from a horizontal position. 3. The chair of claim 2. 4. A front leg on both sides, an armrest frame on both sides extending diagonally upward from the upper end of the front leg to the rear, and a rear end extending narrower from the lower end of the front leg to the rear. It has a bottom frame on both sides where the parts are connected to each other by a terminal frame, and a crossing frame crossing between the upper ends of the front legs on both sides, and the front end of the seating part can be turned upward from a horizontal position on this crossing frame In the chair where another chair of the same structure can be sequentially stacked along the floor by attaching a backrest between the rear ends of the armrest frames on both sides, The middle part in the direction is connected by a reinforcing frame, and both ends of the guide rod into which the slider ring is inserted are fixed to the reinforcing frame along the reinforcing frame. By interposing a link between the slider ring and loaded with a spring for urging said slider ring between one side of the both end portions upwards, by constraining the lowered position of the slider ring,
The lower ends of the both ends are positioned at positions where the seating portion is horizontally supported via the link, and a space is provided between the backrest and the seating portion in the horizontal position, and the link is provided by the spring. A lower edge of the backrest is positioned at a position for restraining the seating portion which has been urged upward and rotated upwardly. 5. Front legs on both sides, armrest frames on both sides extending obliquely upward and rearward from the upper end of the front legs, and rearwardly extending from the lower end of the front legs so as to become narrower. A bottom frame on both sides connected to each other by a terminal frame, and a transverse frame crossing between the upper ends of the front legs on both sides, and the front end of the seating portion can be turned upward from a horizontal position on the transverse frame. End chairs and crossing frames of a bottom frame in which the chairs are supported and a backrest is attached between the rear ends of the armrest frames on both sides so that another chair of the same structure can be sequentially stacked along the floor surface. A laterally intermediate portion of the guide rod is connected with a reinforcing frame, and both ends of the guide rod into which the slider ring is inserted are fixed to the reinforcing frame along the reinforcing frame. By interposing a link between the rear surface,
By loading a spring for urging the slider ring upward between the slider ring and one side of the both ends, by restraining the descending position of the slider ring,
By positioning the lower ends of the both ends at a position where the seating portion is horizontally supported via the link, and constraining a rising position of the slider ring,
The chair according to claim 1, wherein upper ends of the both ends are positioned at a position for limiting an upward rotation amount of the seating portion biased by the spring.