JP2003009976A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a work to mount a seat on an end of a link element with a supporting axis by eliminating a work to provide a special, non-escaping means to the supporting axis. SOLUTION: A base end of the link element 7a is supported by a supporting base 3 rotatably, and the end of the link element 7a is situated between opposing walls 711 of an attachment member 71 which is at least partially channel-shaped. The supporting axis 74 is penetrated from one opposing wall 711 to the other opposing wall 711 of the attachment member 71 at the position. While the supporting shaft 74 maintains a penetrating state, the seat Z is placed on the attachment member 71 in a manner that the seat Z enfolds outer surfaces of the opposing walls 711 of the attachment member 71 from both sides. An appropriate part of the seat Z is attached to the attachment member 71.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a simplified mounting structure for mounting a seat on a seat via a link element.

[0002]

2. Description of the Related Art In recent years, chairs have a movable back seat for the purpose of improving operability and usability and achieving compactness, and their movements are not simple circular movements or linear movements. The movement is being done. A link mechanism may be adopted as a mechanism for realizing such movement.

The link mechanism is constructed by rotatably supporting the base end of the link element on the leg and rotatably connecting the seat to the tip end so as to support the seat above the leg via the link element. There is.

[0004]

By the way, in order to attach the seat to such a link element, a bearing is provided below the seat, and the upper end of the link element is positioned in the bearing so that the bearing and the upper end of the link element are located. It is customary to rotatably connect using a support shaft. For this reason, it is necessary to provide retaining means at both penetrating ends of the support shaft to ensure reliability in the connected state, and there is a problem that the mounting work is troublesome. In addition, since a certain amount of protrusion must be ensured on the penetrating end side of the support shaft in order to take reliable measures against falling out, the appearance is not good,
In order to conceal this, a separate cover or the like is required, and the cover is inevitably large. Furthermore, since the link elements are usually provided in a pair on the left and right below the seat in order to ensure mechanical balance and smoothness of operation, the above inconvenience is further compounded. The situation is almost the same even when the common support shaft is passed through the left and right link elements.

[0005]

The present invention takes the following means in order to solve such a problem.

That is, the chair of the present invention is such that the seat is attached to the link element, and the link element has a base end rotatably supported and a tip end at least part of which has a channel shape. It is positioned between the opposing walls of the member, and at that position, the support shaft is penetrated from one opposing wall of the mounting member to the other opposing wall, and the penetrating state is maintained and the outer surface of the opposing wall of the mounting member is maintained. The seat is mounted on the mounting member so as to hold the seat from both sides, and an appropriate portion of the seat is mounted on the mounting member.

With this structure, the tip of the link element is positioned between the opposing walls of the mounting member, the link element is passed through, and the support shaft is bridged between the opposing walls, and the opposing wall is held in that state. When the seat is mounted on the support shaft, the support shaft is prohibited from coming out of the facing wall by the seat. Therefore, it is not necessary to provide any special retaining means for the support shaft, and the mounting structure can be simplified. Further, since it is not necessary to secure an amount of protrusion on the penetrating end side of the support shaft to an unnecessarily large amount, it is possible to make the connecting portion compact.

In order to be able to conceal the tips of the link elements at the same time, it is desirable to form a downwardly opening recess in the lower surface of the seat and accommodate the mounting member in the recess.

In order to further simplify the mounting, the seat is composed of a seat portion which is a main body and a seat receiving portion which receives the seat portion. It is desirable to fix it to the mounting member and attach the seat portion to the seat support.

In order to ensure the behavior of the link elements and at the same time effectively improve the appearance of the chair through a compact structure, the link elements are arranged in a pair in the width direction of the seat portion. It is preferable that a blindfold element is installed between the plate and the blindfold element so as to cover a part or all of the internal mechanism provided below the seat. Here, the "internal mechanism" is a drive mechanism, a transmission mechanism, or the like arranged between the link portions.

A preferred application of the present invention is where the link element is for supporting the front end of the seat.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are a side view and a front view of a chair 1 showing an embodiment of the present invention.
Is a partially exploded perspective view showing a part of the mechanical portion, and FIGS. 4 to 6 are explanatory views of the operation of this chair.

The chair 1 has a base leg 2 and a backrest portion 5.
In addition to supporting the seat portion 6 and the seat portion 6, it is possible not only to take a posture suitable for work, but also to selectively take a posture suitable for rest and refreshment. , Rocking for interlocking rocking with the base leg 2 or between the base leg 2 and the backrest part 5, the seat part 6 and the like, the lifting mechanism P for adjusting the height of the back seat, the backrest part 5 and the seat part 6 interlockingly. The mechanism Q, the upper backrest tilting mechanism R for tilting only the upper portion of the backrest 5 backward for stretching, the lower backrest tilting mechanism S used for selectively pressing the lumbar bone, and the seat 6 are provided. A seat front-back adjustment mechanism T for moving back and forth is provided.

More specifically, the base leg 2 is formed by projecting a rotary shaft 21 upward from the center of the leg blade 20, and the seat 6 and the backrest 5 supported on the rotary shaft 21 are rotated. It is designed so that it can be turned around 21. The elevating mechanism P has a gas spring 22 incorporated in the rotary shaft 21 of the base leg 2, and by appropriately operating the gas spring 22, the back seat can be locked at an arbitrary elevating position within the operating range. .

The backrest 5 is a backrest lower frame 5
0, a backrest upper frame 55, and a tension member 8 that is bridged between these two frames 50, 55 via an elastic member (not shown).
Both 0 and 55 are rotatably attached to a rotary shaft 72 provided in the inner portion of the link element 7b.

The seat portion 6 is provided with a cushion body 60 having a recess corresponding to the thigh of the seated person, and a shell 61 for supporting the lower side of the cushion body 60.

On the other hand, the locking mechanism Q has a support base 3 attached to the base leg 2, a seat support 4 for supporting the seat portion 6, and a link element 7a for connecting the support base 3 and the seat support 4 to each other. 7
It is mainly composed of an unequal-sided four-sided link mechanism including b and a gas spring 31 for fixing the link element 7a at an appropriate position. The seat Z of the present invention is constituted by the seat portion 6 and the seat support 4.

The support base 3 is V-shaped and is made of a rigid member such as aluminum die cast. The base end of the support base 3 is fixed to the rotary shaft 21, and the tip end thereof is projected obliquely upward. A torsion bar 70 capable of accumulating and releasing an elastic force in the torsional direction through a rotation shaft (not shown) is provided on the lower surface of the center of the hypotenuse of the support base 3.

The seat support 4 is formed in a planar shape by a metal member such as aluminum so as to support the shell 61 of the seat 6, and the elbow rods 9 are attached to both left and right sides of the seat support 4. An elbow rod attachment portion 44 (see FIG. 7) is provided for this purpose.

One end of the link element 7a is rotatably attached to the front of the support base 3 via a rotary shaft 30, and the other end thereof is a seat receiver 4
It is a plate-like member that is rotatably attached to the front rear surface of the through a support shaft 74.

The link element 7b has one end fixed to the rotary shaft of the torsion bar 70 provided in the central portion of the hypotenuse of the support base 3 and the other end rotatable to a rotary shaft 79 provided on the rear end side of the seat support 4. Normally, the backrest lower frame 50 and the backrest upper frame 55 described above are integrally fixed to the link element 7b in a state in which the rotation function around the rotation shaft 72 is stopped, and the link element 7b is connected to the link element 7b. The torsion bar 70 can rotate around the rotation axis of the torsion bar 70.

The gas spring 31 is provided between the link element 7a and the support base 3, and the entire four-sided link mechanism is locked by selectively fixing the link element 7a.

The backrest upper tilting mechanism R functions by allowing the rotation of the backrest upper frame 55 around the rotation axis 72, and is specifically composed of a lock mechanism r and a spring member 73. Has been done.

As shown in FIG. 3, the lock mechanism r includes a hole 77 provided above the link element 7b and a bracket 5 having a substantially diamond shape in a side view, which is attached to the backrest upper frame 55.
A hole 551 formed in the hole 50, and a pin 76 that is normally arranged at a position straddling both holes 77 and that releases the restraint between the backrest upper frame 55 and the link element 7b by selectively withdrawing from the hole 551. It is composed of Inside the bracket 550 located inside the lower end of the backrest upper frame 55, a bracket 7b1 having the same shape is provided so as to be integrated with the link 7b. The brackets 550 and 7b1 are overlapped to form the hole 5
The hole 77 is located inside 51 so that the pin 76 can be inserted. Then, the pin 76 has two holes 77,
In the state of being inserted in 551, the link element 7b
And the backrest upper frame 55 are constrained to move integrally, and by pulling out the pin 76 from the hole 551, the above restraint is released and only the backrest upper frame 55 is centered around the rotating shaft 72. I am trying to rotate.

The spring member 73 is the backrest upper frame 5
The backrest upper frame 55 is pressed in the upright direction in order to give elasticity to the member 5 when tilting.

Further, the lower backrest tilting mechanism S uses the lower backrest frame 50, and a gas spring (not shown) is provided at a position where the lower backrest frame 50 can be pushed forward with the rotation shaft 72 as a fulcrum. .

Further, the seat back-and-forth movement mechanism T arranges the rack 41 and the pinion 63 shown in FIGS. 7 and 8 between the seat support 4 and the shell 61 to perform the forward and backward sliding movement of the seat portion with respect to the seat support 4. It is a guide.

Therefore, in order to selectively utilize the above-mentioned various mechanisms P to T with the seat portion 6 attached to the front end of the seat support 4, as shown in FIG. 7, the levers 43a and 43b are used. , 43
c is provided. The lever 43a is for moving the seat 6 up and down as shown in FIG.
As shown in FIG. 5, only the backrest lower frame 50 is tilted backward, and the lever 43c is provided with a seat portion 6 as shown in FIG.
The backrest upper frame 55 and the backrest lower frame 50 are interlocked and locked together. The tilting of only the backrest upper frame 55 can be performed without operating the lever only when not locking.

In this embodiment, the link element 7a supporting the front end portion of the seat support 4 has the structure shown in FIG.
Also, the mounting member 71 shown in FIG. 10 is mounted, and the seat support 4 constituting the seat is fixed to the mounting member 71.

The link element 7a has a blindfold element 70 between a pair of link portions 701 which are spaced apart in the seat width direction.
In the present embodiment, the link portion 701 and the blindfold element 702 are integrally formed of resin. The base end of the link element 7a is rotatably supported by the support base 3. A shaft through hole 701a is provided at the tip of the link portion 701, and the blindfold element 7
Reference numeral 02 connects the link portions 701 on the base end side of the shaft through holes 701a so as not to close the shaft through holes 701a.

On the other hand, the mounting member 71 has a downward channel shape, and the inner dimension of the facing wall 711 is set to a value capable of accommodating the link element 7a relatively closely.
The shaft penetrating hole 701a of the link element 7a is formed in the facing wall 711.
Is provided with a shaft through hole 711a, and a screw hole 712 for attaching the seat support 4 to the top wall 712 of the shaft through hole 711a.
a is provided.

Further, the seat support 4 is provided with a recess 4b on its lower surface 4a for accommodating a part of the top wall 712 and the facing wall 711 of the mounting member 71, and the lower surface 4a is directed downward. A pair of projecting pieces 4c is provided so as to project. In this case, the inner wall of the recess 4b in the width direction and the inner wall of the protruding piece 4c are substantially flush with each other, and the inner dimension thereof is the mounting member 7.
The outer dimension between the facing walls 711 is substantially matched.

Then, one opposing wall 71 of the mounting member 71
1, link element 7a, the other opposing wall 71 of the mounting member 71
In the order of 1, the support shaft 7 is inserted into the shaft through holes 711a and 701a.
4 so that the outer surface of the opposing wall 711 of the mounting member 71 is held from both sides by the projecting pieces 4c while maintaining the penetrated state, and the top wall 712 of the mounting member 71 is provided in the recess 4b.
Also, the seat support 4 is mounted so as to accommodate a part of the facing wall 711, and the screw v, which is a fixture passed from above into the screw passage hole 4d provided in the seat support 4, is screwed into the screw hole 7 of the mounting member 71.
The seat support 4 is attached to the link element 7a via the attachment member 71 by being screwed to 12a.

A seat portion 6 is attached to the seat support 4. As described above, the seat portion 6 is composed of the cushion body 60 and the shell 61. In order to enable the shell 61 to be detachably attached to the seat support 4, as shown in FIG. Projections 62f and 62b are provided on the front end side and the rear end side of the. On the other hand, the seat support 4 has a long hole portion 40f extending in the front-rear direction at a corresponding position of the projecting portions 62f and 62b on the plane portion thereof, as shown in FIG.
40b is provided. Then, the long holes 40f, 40
Insert the projecting portions 62f and 62b of the shell 61 into b,
By adopting an appropriate retaining structure on the insertion end side, upward disengagement is restricted.

In the chair of the present embodiment configured as described above, when the seat Z is attached to the link element 7a, the link element 7a is rotatably supported at the base end and at least a part of the tip is a channel. The opposing wall 71 of the mounting member 71 in the shape of
It is positioned between 1 and 1. Then, at that position, from one opposing wall 711 of the mounting member 71 to the other opposing wall 7
11, the support shaft 74 is penetrated, and the seat Z is placed on the mounting member 71 so that the outer surface of the facing wall 711 of the mounting member 71 is held from both sides while maintaining the penetrating state, and a proper portion of the seat Z is mounted. It is attached to the attachment member 71.

Therefore, the tip of the link element 7b is positioned between the opposing walls 711 of the mounting member 71, and the link element 7b is
When the seat Z is mounted so as to hold the facing wall 711 in this state, the supporting shaft 74 is prohibited from coming out of the facing wall 711 by the seat Z. It Therefore, in this embodiment, it is not necessary to provide a special retaining means for the support shaft 74, and the mounting structure can be simplified. Further, since it is not necessary to secure the protrusion amount of the support shaft 74 on the penetrating end side more than necessary, it is possible to effectively prevent the connecting portion from becoming larger than necessary.

Moreover, since the recess 4b opening downward is formed on the lower surface of the seat Z and the mounting member 71 is accommodated in the recess 4b, the tip of the link element 7a can be hidden at the same time. Therefore, it is possible to obtain a structure that does not spoil the appearance as much as possible.

In particular, in this embodiment, the seat Z is composed of a seat portion 6 which is a main body and a seat receiver 4 which receives the seat portion 6, and the seat receiver 4 is mounted on the mounting member 71 and the mounting tool is mounted from above. Since the seat portion 6 is fixed to the mounting member 71 by means of the barrel screw v and the seat portion 6 is mounted to the seat receiving portion 4, it is easy to visually recognize it from the upper side in combination with the fact that the support shaft 74 is not provided with a measure to prevent it from coming off. The mounting work can be sequentially performed, and the work can be further simplified.

In particular, since the link element 7a is a plate-like member in which a blindfold element 702 is provided between a pair of link portions 701 which are spaced apart from each other in the width direction of the seat portion 6, the blindfold element 702 is used to seat the link element 7a. Not only can a part or all of the internal mechanism provided below Z be concealed to improve the appearance of the chair, but also a pair of link parts 701 can be used.
Can be completely synchronized to increase the rigidity of the link element 7a and at the same time ensure its behavior.

As described above, the attachment structure of the link element, which is a feature of the present invention, is applied to the link element 7a on the front end side which is relatively conspicuous and requires comparatively complicated operation and is required to have strength. Can be useful.

The specific structure of each part is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0042]

EFFECTS OF THE INVENTION Since the present invention has the structure described above, it is not necessary to provide any special retaining means for the support shaft, and the mounting work for mounting the seat on the tip of the link element by the support shaft is simple. Can be realized. Further, since it is not necessary to secure an amount of protrusion on the penetrating end side of the support shaft to an unnecessarily large amount, it is possible to make the connecting portion compact. Therefore, the present invention can be extremely useful when applied to a link element or the like that supports the front end side of the seat.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a partially exploded perspective view of the same.

FIG. 4 is an explanatory view of the same operation.

FIG. 5 is an explanatory view of the same operation.

FIG. 6 is an explanatory view of the same operation.

FIG. 7 is a plan view showing the same embodiment with a seat removed.

FIG. 8 is a bottom view showing the seat portion of the same embodiment.

FIG. 9 is an exploded perspective view of main parts of the same embodiment.

FIG. 10 is a sectional view of the same main part.

[Explanation of symbols]

4 ... Seating 4b ... recess 6 ... Seat 7a ... Link element 71 ... Mounting member 74 ... Spindle 701 ... Link section 702 ... Blindfold element 711 ... Opposing wall v ... Fixture (screw) Z ... za

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yojiro Kinoshita             6-1, 1-1 Minami Oimazato, Higashinari-ku, Osaka             Kuyo Co., Ltd. (72) Inventor Toshiyuki Horiki             5331 Takaharu Shimogawara, Nishiharu near Ina City, Nagano Prefecture             Inside the furniture development department F-term (reference) 3B099 AA02 BA02 CA35 DA02 DA10                 3J105 AA02 AA03 AA04 AB48 AB49                       AC01 BA12 BA16

Claims (5)

[Claims] 1. A seat for attaching to a link element, wherein the link element is rotatably supported at a base end thereof, and has a distal end between opposing walls of a mounting member having at least a part of a channel shape. At this position, the supporting shaft is penetrated from one opposing wall of the mounting member to the other opposing wall, and the penetrating state is maintained so that the outer surface of the opposing wall of the mounting member is held from both sides. A chair, wherein a seat is mounted on the mounting member, and an appropriate portion of the seat is mounted on the mounting member. 2. The chair according to claim 1, wherein a recess opening downward is formed on the lower surface of the seat, and the mounting member is accommodated in the recess. 3. A seat is composed of a seat portion which is a main body and a seat receiver for receiving the seat portion. The seat receiver is mounted on a mounting member and fixed to the mounting member from above by a mounting tool. The chair according to claim 1 or 2, wherein a seat portion is attached to the chair. 4. The link element is a plate-like member in which a blindfold element is provided between a pair of link portions that are spaced apart from each other in the width direction of the seat portion, and the interior provided below the seat by the blindfold element. The chair according to claim 1, 2 or 3, wherein part or all of the mechanism is hidden. 5. A chair according to claim 1, 2, 3 or 4, wherein the link element is for supporting the front end of the seat.