JPH0838293A - Chair - Google Patents

Abstract

PURPOSE:To provide a chair, composed of few part items and with easy mechanism, whose upright bar in a backrest part corresponding to the seat frame of a seat can easily be assembled in one operation, and whose cost is reasonable. CONSTITUTION:An upright bar 9 in a backrest part is located inside the seat frame 6 of a seat so that the side face of the upright bar 9 faces the inside of the seat frame 6, a first controlling pin 10 and a second controlling pin 11 are stuck outward respectively on each end part and each middle part of both side faces of the upright bar 9, and a guide groove 13 by which the backrest part 2 slides while leading the first controlling pin 10 and a moving groove 14 by which the second controlling pin 11 moves vertically, are mounted on the inside face of the seat frame 6. The first controlling pin 10 located inside the guide groove 13 serves as a pivotal supporting point, which makes the second controlling pin 11 located inside the moving groove 14 so as to freely revolvable, and an elastic member 19 is located between the upright bar 9 and the seat frame 6 to add an elastic energization to the upright bar 9 when tilting forward.

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 easily assemble a back support column of a backrest portion with respect to a seat support of a seat portion with one touch, and can be made inexpensive. .

[0002]

2. Description of the Related Art As a conventional chair, with a back support of a backrest part positioned in a seat support of a seat part, a metal connecting pin is penetrated from the side and an E ring or the like for preventing coming out. There is one in which a metal back strut is assembled to a metal seat support by fitting into the groove formed on the surface of the connecting pin.

[0003]

However, in the conventional chair, the connecting pin is inserted by aligning the through hole formed in the seat support of the seat portion with the through hole formed in the back strut of the backrest portion. Since it is necessary to fit an E-ring etc. for retaining to the groove on the surface of the connecting pin with the connecting pin inserted, it is very troublesome as work, and the number of parts is large. Since the structure is also complicated, there is a problem that the cost is high.

Therefore, according to the present invention, since the number of parts is small and the structure is simple, it is possible to easily assemble the back strut of the backrest portion with respect to the seat support of the seat portion with one touch, and also in terms of cost. It aims to provide an inexpensive chair.

[0005]

In order to achieve the above object, the back strut of the backrest portion is positioned in the seat support of the seat portion, and the side surface of the back strut and the inner surface of the seat support face each other. A first guide pin and a second guide pin are erected upright on the both ends of the side faces, and a guide groove and a second guide pin for guiding the first guide pin and sliding the backrest are provided. A moving groove for moving up and down is provided on the inner side surface of the seat support, and the first restricting pin located in the guide groove serves as a pivot point, and the second restricting pin is positioned in the moving groove to be rotatable. An elastic member is positioned between the back support and the seat support to elastically bias the back support in the forward tilt direction.

Further, a guide groove is provided for guiding the first restriction pin substantially parallel or obliquely downward toward the front of the seat portion, and a movement for guiding the second restriction pin substantially vertically or obliquely upward toward the rear of the seat portion. Those provided with grooves are preferable.

Further, a lower piece having a guide surface and a sliding surface is provided so as to extend in a dogleg shape, and the sliding surface of the lower piece is spaced apart and faces, and extends upward from the middle of the sliding surface. It is preferable that a moving groove is formed by providing an upper piece having a locking portion for the second restriction pin on the upper portion, and the upper piece is set to a length that can hold at least the elastic member up to the maximum compressed state.

In addition, due to the effect described later, a coil spring is used as the elastic member, and the angle between the back strut for locating the coil spring and the seat support is set so as to widen toward the rear of the seat. Is more preferable.

[0009]

As described above, according to the chair of claim 1 of the present invention, the back strut of the backrest portion is inserted into the seat receiving portion of the seat portion to position the first regulating pin in the guide groove, and the seat portion By sliding the back support column of the backrest portion with respect to the seat support, the second regulation pin is guided to the entrance of the movement groove while moving the first regulation pin in the guide groove, and the first regulation pin is centered. By moving the back strut upwards to position the second regulating pin in the movement groove, and locating the elastic member between the back strut and the seat support, and assembling the back strut with the elastic bias in the forward tilt direction. You can

When the user sits down on a chair and leans against the backrest plate of the backrest part, a load is applied, and the elastic member is compressed to provide cushioning properties.

According to the chair of claim 2, while moving the first regulating pin in the guide groove that guides downward or substantially parallel to the front of the seat, the chair is substantially vertical or obliquely upward to the rear of the seat. The second support pin of the backrest of the backrest part is guided by guiding the second control pin to the moving groove that guides the second control pin, and pivoting the second control pin substantially vertically or diagonally upward toward the rear of the seat with the first control pin as a pivot point. Can be moved upward and an elastic member can be positioned between the back support and the seat support for assembly.

According to the chair of claim 3, the first regulating pin provided on the back column is moved in the guide groove, and the second regulating pin is moved.
Move the regulation pin and drop it down to the guide surface of the movement groove,
When the back strut rear is lifted upward while pulling the back strut rearward, the back strut rotates around the first regulation pin and the second regulation pin moves in the movement groove to move the second regulation pin. By arranging the elastic member between the seat support and the back column and urging the spring while being positioned at the end of the moving groove, it is possible to assemble with the backrest tilted forward.

Further, since the length of the upper piece is set so that at least the elastic member can be held up to the maximum compressed state, when a person sits down on a chair and leans against the backrest plate of the backrest part, a load is applied and a coil spring is used. Even if an elastic member is compressed,
The second restriction pin does not come off the moving groove.

According to the chair of claim 4, since the angle between the back support for locating the elastic member of the coil spring and the seat support is set so as to widen toward the rear of the seat, the coil spring is used. The elastic member that has been set can be easily set.

[0015]

The details of the present invention will be described with reference to the embodiments shown in the drawings. What is shown in FIG. 1 is a chair of a typical embodiment according to the present invention, in which a chair A is composed of a seat portion 1, a backrest portion 2, a support column 3 and a leg portion 4, and the seat portion 1 is As shown in FIG. 2, a seat support 6 and a cushion member 7 are attached to the outer shell 5, and the backrest portion 2 is formed by extending a back support column 9 bent from a backrest plate 8 into a V shape. .

First, as shown in FIG. 3, the back support column 9 is a member having a U-shaped cross section in which the tip portions of the side plates 9a, 9a are projected. ,
A first control pin 10 and a second control pin 11 are erected outward, and a support cylinder 12 for holding an elastic member using a coil spring, which will be described later, is provided on the lower surface of the upper plate 9b. It is integrally molded of synthetic resin or aluminum.

The seat support 6 is integrally formed of synthetic resin, aluminum or the like, and can be fitted into the recess of the outer shell 5 made of synthetic resin by fitting.

As shown in FIGS. 3 and 4, the seat support 6 is a hollow box whose upper and rear parts are open. When the back support column 9 is inserted through the rear opening, both side plates of the back support column 9 are inserted. 9
a, 9a and the inner side surfaces 6a, 6a of the seat support 6 are set to face each other, and the backrest 2 is guided in front of the inner side surfaces 6a, 6a by guiding the first regulating pin 10. The guide grooves 13, 13 for parallel movement are provided, and the movement grooves 14, 14 for moving the second regulating pin 11 up and down are provided behind both the inner side surfaces 6a, 6a. The seat gas cylinder 16 of 3 is a holding cylinder for positioning and fixing the tip of the seat gas cylinder 16.
Is a support receiving portion that rotatably supports the operating rod of the operating lever, and 18 is a bottomed hole to which a support cylinder 12 that holds the lower end of an elastic member 19 using a coil spring is attached.

Further, as shown in FIGS. 3 and 4, the guide groove 13 is configured such that the first upper projecting piece 20 and the first lower projecting piece 21 are offset from each other in the vertical direction, and both inner side surfaces 6a of the seat support 6 are 6a, the guide surface 20a of the first upper protruding piece 20 and the guide surface 21a of the first lower protruding piece 21 are spaced apart and face each other so that the first regulating pin 10 can be guided obliquely downward toward the front of the seat portion. It is the one.

In addition to the above-mentioned guide groove 13, as shown in FIG. 6, the guide groove 13 extends in parallel to the seat support 6 without being inclined, and the first guide groove 13 guides the first regulating pin 10. By providing a taper portion 20b at the end of the upper protrusion 20,
The guide of the first restriction pin 10 may be facilitated.

The moving groove 14 is, as shown in FIGS. 3 and 4,
The second upper projecting piece 22 and the second lower projecting piece 23 are provided on both inner side surfaces 6a, 6a of the seat support 6 by shifting the upper and lower positions, and specifically, the second lower projecting piece 23 is slanted downward. The slide surface 23 has a guide surface 23a for guiding the second restriction pin 11, and continuously guides the second restriction pin 11 diagonally upward toward the rear of the seat.
A temporary holding portion 23 is formed on the way as a dogleg shape having b.
c is provided, and the sliding surface 23 of the second lower protruding piece 23
The guide surface 22a is separated from a in the middle and upward.
2nd upper projection piece 22 having the above is disposed in parallel, and the upper part of the 2nd upper projection piece 22 is locked so that the second regulating pin 11 is stopped.
22a is provided. Also, the illustrated second upper protrusion
22 is extended to a position where the second regulating pin 11 cannot be pulled out even when the backrest portion 2 leans against the load and the elastic member 19 described later is in the maximum compressed state.

Although the above-described moving groove 14 extends obliquely upward toward the rear of the seat, it may be formed to extend substantially vertically. In the chair A described above, the second regulating pin 11 is locked to the locking portion 22b of the moving groove 14 so that the backrest 2 is held at a predetermined angle with respect to the seat 1. The support 9 may be brought into contact with the outer shell 5 at a proper position to hold the backrest 2 at a predetermined angle. Further, in the above-described chair A, the first regulating pin 10 and the second regulating pin 11 are provided on the back strut 9, and the guide groove 13 and the moving groove 14 are provided on the seat support 6, but the mounting may be reversed. It is possible.

When assembling the back strut 9 of the backrest 2 with respect to the seat support 6 of the seat 1, the front end of the back strut 9 is inserted through the opening at the rear of the seat support 6, and as shown in FIG. ), The first restricting pin 10 erected from the side plates 9a, 9a of the back strut 9 is moved diagonally downward in the guide groove 13, and
By moving the second restricting pin 11 along the outer surface of the second upper projecting piece 22, dropping the second restricting pin 11 to the guide surface 23a of the second lower projecting piece 23, and pulling the back strut 9 rearward,
The second restriction pin 11 moves to the temporary holding portion 23c, and further, as shown in FIG.
As shown in (b), when the back strut 9 rear is lifted upward with the first regulation pin 10 as the center, the back strut 9 rotates about the first regulation pin 10 and the second regulation pin 11 moves. It moves in the moving groove 14 of the second lower protruding piece 23, and the second regulating pin 11 is moved to the second position.
With the upper protrusion 22 positioned on the locking portion 22b, as shown in FIG.
As shown in (c), the upper and lower ends of the elastic member 19 using a coil spring are fitted to the bottom surface of the seat support 6 and the support cylinder 12 provided on the lower surface of the back support column 9 to urge the spring. It is possible to assemble the leaning part 2 with the front part tilted. Although the coil spring is used as the elastic member 19 in the above-described example, a leaf spring or rubber may be used.

In particular, in the seat support 6 of the illustrated example, as shown in FIG. 5C, the inclination angle between the lower surface of the upper plate 9b of the back column 9 and the bottom surface of the seat support 6 is widened toward the rear of the seat. Since the taper is provided as described above, the elastic member 19 using the coil spring can be easily attached, and after the attachment,
This elastic member 19 has an effect of preventing the back support 9 from coming off.

By using the thus-assembled chair A, a load is applied when the user sits down and leans against the backrest plate 8 of the backrest portion 2, and the elastic member 19 is compressed as shown in FIG. 5C. Therefore, since the second upper projecting piece 22 covers the distance that the second regulation pin 11 moves, the second regulation pin 11
Does not come off the moving groove 14.

As described above, according to the chair A of the representative embodiment of the present invention, the first support pin 9 of the backrest portion 2 is moved in parallel with the seat support 6 of the seat portion 1 so as to move the first restraining pin. While moving 10 into the guide groove 13, the second regulating pin 10 is guided to the entrance of the moving groove 14, and the back strut 9 is moved upward by moving the second regulating pin 11 around the first regulating pin 10. The elastic member 19 using a coil spring is moved to the engaging portion 22b of the groove 14.
Since it can be assembled simply by attaching, the back strut 9 of the backrest 2 can be easily assembled to the seat support 6 of the seat 1 with one touch. Also, by integrally forming the back support column 9 with synthetic resin, aluminum, or the like,
The first regulating pin 10, the second regulating pin 11, etc. can be formed, and the guide groove 13, the moving groove 14, etc. can be formed by integrally molding the seat support 6 with synthetic resin, aluminum or the like. Therefore, it is possible to significantly reduce the cost by significantly reducing the number of parts.

[0027]

According to the chair of claim 1 of the present invention,
Insert the tip of the back support column of the backrest into the seat support of the seat
The second regulation pin is moved in the guide groove while the first regulation pin is moved in the guide groove by positioning the regulation pin in the guide groove and sliding the back support column of the backrest portion with respect to the seat support of the seat portion. Of the first support pin, the back support post is moved upward about the first control pin to position the second control pin in the moving groove, and the elastic member is positioned between the back support post and the seat support for assembly. Therefore, the back support column of the backrest part can be easily assembled with one touch with respect to the seat support of the seat part. Further, the first support pin and the second control pin can be formed by integrally forming the back support column with synthetic resin, aluminum, or the like, and the seat support can be integrally formed with synthetic resin, aluminum, or the like. Since the guide groove, the moving groove and the like can be formed, the cost can be significantly reduced by significantly reducing the number of parts.

Further, according to the chair of claim 2, while moving the first regulating pin in the guide groove which is guided substantially parallel or obliquely downward toward the front of the seat, the chair is moved substantially vertically or toward the rear of the seat. Guide the second regulating pin to the moving groove that guides diagonally upward,
By rotating the second regulating pin substantially vertically or obliquely upward toward the rear of the seat with the first regulating pin as a pivot point, the back strut of the backrest part is moved upward, and between the back strut and the seat support. Since the elastic member can be positioned and assembled, the assembly can be performed more easily by a series of operations.

Further, according to the chair of claim 3, since the length of the upper piece is set so that at least the elastic member can be held to the maximum compressed state, the person sits on the chair and leans on the backrest plate of the backrest portion. Even if the elastic member, which is the coil spring, is compressed by being applied with a load, the second regulating pin does not come off from the moving groove.

Further, according to the chair of the present invention, the angle between the back strut for locating the elastic member of the coil spring and the seat support is set so as to expand toward the rear of the seat portion.
It is possible to easily set the elastic member using the coil spring. Moreover, since the back strut is elastically biased in the forward tilt direction by the elastic member using the coil spring, it has a retaining effect.

[Brief description of drawings]

FIG. 1 is a side view of a chair according to a representative embodiment of the present invention.

FIG. 2 is an explanatory sectional view showing the main part of the chair.

FIG. 3 is an exploded perspective view of a back support and a seat support.

FIG. 4 (a) is a plan view of a seat support, and (b) is a sectional view taken along the line AA of the seat support.

FIG. 5 is an explanatory view showing the procedure for assembling the back support column and the seat support.

FIG. 6 is a side view showing a guide groove of another example.

[Explanation of symbols]

A chair 1 seat part 2 backrest part 3 support post 4 leg part 5 outer shell 6 seat support 7 cushioning material 8 backrest plate 9 back support post 10 first regulation pin 11 second regulation pin 12 support tube 13 guide groove 14 moving groove 15 Holding cylinder 16 Seat gas cylinder 17 Support receiving portion 18 Bottomed hole 19 Elastic member 20 First upper protrusion 21 First lower protrusion 22 Second upper protrusion 23 Second lower protrusion

Claims (4)

[Claims] 1. The back support of the backrest part is located in the seat support of the seat, and the back support side surface and the inner surface of the seat support face each other. The pin and the second regulation pin are erected outward, and the guide groove for guiding the first regulation pin and sliding the backrest portion and the moving groove for vertically moving the second regulation pin are provided in the seat. It is provided on the side,
The second regulating pin is positioned in the moving groove with the first regulating pin positioned in the guide groove as a pivotal point so as to be rotatable, and the elastic member is positioned between the back column and the seat support to fix the back column. A chair that is elastically biased in the forward tilt direction. 2. A movement for guiding the first restriction pin substantially parallel or obliquely downward toward the front of the seat portion, and moving the second restriction pin substantially vertically or obliquely upward toward the rear of the seat portion. The chair according to claim 1, wherein the chair is provided with a groove. 3. A lower piece having a guide surface and a sliding surface is provided so as to extend in a V-shape, faces the sliding surface of the lower piece apart from each other, and extends upward from the middle of the sliding surface. 2. A moving groove is formed by providing an upper piece having a locking portion for the second regulation pin on the upper portion, and the upper piece is set to a length capable of holding at least the elastic member up to the maximum compressed state. Chair. 4. The chair according to claim 3, wherein a coil spring is used as the elastic member, and the angle between the back support column for locating the coil spring and the seat support is set to expand toward the rear of the seat portion.