JP4475491B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a chair that simplifies the mounting structure when a seat is attached to a seat portion via a link element.
[0002]
[Prior art]
Modern chairs are designed to move the back seat and make it a complex movement that is not a simple circular or linear movement, for the purpose of improving operability, usability, and downsizing. Has been done. And a link mechanism may be employ | adopted as a mechanism for implement | achieving such a motion.
[0003]
Such a link mechanism is configured such that the base end of the link element is rotatably supported by the leg and the seat is rotatably connected to the tip in order to support the seat via the link element above the leg.
[0004]
[Problems to be solved by the invention]
By the way, in order to attach the seat to the link element, a bearing is provided below the seat, the upper end of the link element is positioned in the bearing, and the upper end of the bearing and the link element are rotatably connected using a support shaft. It is customary to do this. For this reason, it is necessary to provide retaining means at both penetrating ends of the support shaft to ensure the connected state, and there is a problem that the mounting work is troublesome. In addition, in order to take a certain measure against slipping off, it is necessary to secure a certain amount of protrusion on the penetrating end side of the support shaft, so that it does not look good, and a cover or the like is separately required to conceal this. There is an inconvenience that the cover must be relatively large. Furthermore, since the link elements are usually provided in a pair of left and right below the seat in order to ensure mechanical balance and smooth operation, the above disadvantages are further doubled. The situation is almost the same even when a common spindle is passed through the left and right link elements.
[0005]
[Means for Solving the Problems]
In order to solve such problems, the present invention takes the following measures.
[0006]
That is, the chair of the present invention has the backrest and the seat supported by the base leg, and the backrest and the seat are interlocked by connecting the support base attached to the base leg and the seat by the front and rear link elements. The front link element is a plate-like element in which a blindfold element is installed between a pair of link parts spaced apart in the width direction of the seat, and the base end is supported. It is rotatably supported by the base, and the tip is positioned between the opposing walls of the mounting member having at least a part of a channel shape, and is supported at that position from one opposing wall to the other opposing wall. The shaft is penetrated, the seat is mounted on the mounting member so that the outer surface of the opposing wall of the mounting member is held from both sides while maintaining the penetrating state, and an appropriate part of the seat is attached to the mounting member. When That.
[0007]
If this is the case, position the tip of the link element between the opposing walls of the mounting member, pass through the link element, span the spindle between the opposing walls, and hold the seat so as to hold the opposing wall in that state. At the stage of mounting, the support shaft is prohibited from coming off the opposing wall by the seat. Accordingly, it is not necessary to provide a special retaining means for the support shaft, and the mounting structure can be simplified. Further, since it is not necessary to secure an unnecessarily large protrusion amount on the penetrating end side of the support shaft, the connecting portion can be made compact.
[0008]
In order to conceal the tip of the link element at the same time, it is desirable to form a recess opening downward on the lower surface of the seat and accommodate the mounting member in the recess.
[0009]
In order to make the mounting more simple, the seat is composed of a seat portion which is a main body and a seat receiver which receives the seat portion, and the seat receiver is mounted on the mounting member and attached from above with a fixture. It is desirable that the seat is attached to the seat support.
[0010]
In the present invention, in order to ensure the behavior of the link element and at the same time effectively improve the appearance of the chair through a compact configuration, the link element is arranged in a pair spaced apart in the width direction of the seat. It has a plate-like shape in which a blindfold element is installed between the link portions .
[0011]
A preferred application of the present invention is when the link element is for supporting the front end of the seat.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described 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, FIG. 3 is a partially exploded perspective view showing a part of a mechanism, and FIGS. 4 to 6 are actions of this chair. It is explanatory drawing.
[0013]
This chair 1 is formed by supporting the backrest part 5 and the seat part 6 on the base leg 2 and can take not only a use posture suitable for work, but also a posture suitable for repose and refreshment as appropriate. In order to be able to take it selectively, the elevating mechanism P for adjusting the height of the back seat between the base leg 2 or between the base leg 2 and the backrest portion 5, the seat portion 6, etc., the backrest portion 5 and the seating portion 6 are interlocked to lock the locking mechanism Q, the backrest upper tilting mechanism R that tilts only the upper portion of the backrest portion 5 for stretching, etc., and the hips are selectively pressed. A lower backrest tilting mechanism S and a seat front / rear adjustment mechanism T for moving the seat 6 back and forth are provided.
[0014]
More specifically, the base leg 2 has a rotating shaft 21 protruding upward from the center of the leg blade 20, and the seat portion 6 and the backrest portion 5 supported thereon are arranged around the rotating shaft 21. It can be made to turn. The elevating mechanism P incorporates a gas spring 22 in the rotating shaft 21 of the base leg 2 and operates the gas spring 22 as appropriate so that the back seat can be locked at an arbitrary elevating position in the operating range. .
[0015]
The backrest portion 5 includes a backrest lower frame 50, a backrest upper frame 55, and a tension member 8 spanned between the frames 50 and 55 via an elastic member (not shown). Both 50 and 55 are rotatably attached to a rotating shaft 72 provided in the inner part of the link element 7b.
[0016]
The seat 6 includes a cushion body 60 having a depression corresponding to the thigh of the seated person, and a shell 61 that supports the lower side of the cushion body 60.
[0017]
On the other hand, the locking mechanism Q includes a support base 3 attached to the base leg 2, a seat receiver 4 that supports the seat portion 6, and link elements 7 a and 7 b that connect between the support base 3 and the seat receiver 4. The unequal side four-side link mechanism is mainly used, and a gas spring 31 for fixing the link element 7a at an appropriate position is attached thereto. The seat Z of the present invention is constituted by the seat portion 6 and the seat receiver 4.
[0018]
The support base 3 has a V-shape made of a rigid member such as an aluminum die cast, and its base end is fixed to the rotary shaft 21 and the tip is projected obliquely upward. A torsion bar 70 capable of accumulating and releasing elastic force in the torsional direction through a rotating shaft (not shown) is provided on the lower surface of the central part of the hypotenuse of the support base 3.
[0019]
The seat receiver 4 is formed into a planar shape by a metal member such as aluminum so as to support the shell 61 of the seat portion 6, and an elbow for attaching the armrest 9 to the left and right sides of the seat receiver 4. A scissors mounting portion 44 (see FIG. 7) is provided.
[0020]
The link element 7 a is a plate-like member having one end rotatably attached to the front of the support base 3 via the rotary shaft 30 and the other end rotatably attached to the front back surface of the seat receiver 4 via the support shaft 74. is there.
[0021]
One end of the link element 7b is fixed to the rotation shaft of the torsion bar 70 provided at the center of the hypotenuse of the support base 3, and the other end is rotatably connected to the rotation shaft 79 provided on the rear end side of the seat 4. Normally, the lower backrest frame 50 and the upper backrest frame 55 described above are integrally fixed to the link element 7b in a state where the rotation function around the rotation shaft 72 is stopped, and the torsion bar 70 together with the link element 7b. It can rotate around the rotation axis.
[0022]
The gas spring 31 is provided between the link element 7a and the support base 3, and locks the entire four-sided link mechanism by selectively fixing the link element 7a.
[0023]
Further, the backrest upper tilting mechanism R functions by allowing the backrest upper frame 55 to rotate around the rotation shaft 72, and specifically includes a lock mechanism r and a spring member 73. .
[0024]
As shown in FIG. 3, the locking mechanism r includes a hole 77 provided above the link element 7b, a hole 551 provided in a bracket 550 having a generally rhombic shape in side view attached to the backrest upper frame 55, The pin 76 is disposed at a position straddling both the hole portions 77 and selectively lifted from the hole portion 551 to release the restraint between the backrest upper frame 55 and the link element 7b. 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 551. The hole 77 is positioned inside and the pin 76 is inserted. Thus, in a state where the pin 76 is inserted into both the hole portions 77 and 551, the link element 7b and the backrest upper frame 55 are restrained and move integrally, and the pin 76 is pulled out from the hole portion 551. Thus, the above restraint is released so that only the backrest upper frame 55 can independently rotate about the rotation shaft 72.
[0025]
The spring member 73 is for imparting elasticity to the backrest upper frame 55 when tilted, and presses the backrest upper frame 55 in the standing direction.
[0026]
Further, the lower backrest tilting mechanism S utilizes the lower backrest frame 50, and a gas spring (not shown) is provided at a position where the lower backrest frame 50 can be pressed forward with the rotating shaft 72 as a fulcrum.
[0027]
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 receiver 4 and the shell 61 so as to guide the back-and-forth slide movement of the seat relative to the seat receiver 4. It is a thing.
[0028]
Thus, at the front end of the seat receiver 4, levers 43a, 43b, 43c are provided as shown in FIG. 7 in order to selectively utilize the above mechanisms P to T with the seat 6 attached. It is provided. The lever 43a is for raising and lowering the seat 6 as shown in FIG. 4, the lever 43b is for tilting only the lower backrest frame 50 as shown in FIG. 6, and the lever 43c is shown in FIG. In this manner, the seat portion 6, 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 a lever operation only when not rocking.
[0029]
9 and 10 is attached to the link element 7a that supports the front end portion of the seat receiver 4, and the seat receiver that constitutes the seat is attached to the attachment member 71. 4 is fixed.
[0030]
The link element 7a is a plate-shaped member in which a blindfold element 702 is installed between a pair of link portions 701 that are spaced apart in the width direction of the seat. In this embodiment, the link portion 701 and the blindfold element 702 are made of resin. It is integrally molded. 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 distal end of the link portion 701, and the blindfold element 702 connects the link portions 701 on the proximal end side so as not to block the shaft through hole 701a.
[0031]
On the other hand, the attachment member 71 has a downward channel shape, and the inner dimension between the opposing walls 711 is set to a value capable of accommodating the link element 7a relatively closely. A shaft through hole 711 a that matches the shaft through hole 701 a of 7 a is provided, and a screw hole 712 a for attaching the seat receiver 4 to the top wall 712 is provided.
[0032]
In addition, the seat receiver 4 is provided with a recess 4b on the lower surface 4a thereof that can accommodate a part of the top wall 712 and the opposing wall 711 of the mounting member 71, and a pair of protrusions downward on the lower surface 4a. The piece 4c is protruded. In this case, the inner wall in the width direction of the recess 4b and the inner wall of the projecting piece 4c are substantially flush with each other, and the inner dimension is approximately matched to the outer dimension between the opposing walls 711 of the mounting member 71. is there.
[0033]
Then, the supporting shaft 74 is passed through the shaft through holes 711a and 701a in the order of one opposing wall 711 of the mounting member 71, the link element 7a, and the other opposing wall 711 of the mounting member 71, and the mounting is performed while maintaining the through state. The seat receiver 4 is mounted so that the outer surface of the opposing wall 711 of the member 71 is held from both sides by the protruding pieces 4c, and the top wall 712 of the mounting member 71 and a part of the opposing wall 711 are accommodated in the recess 4b. Then, the screw v, which is a fitting passed through the screw passage hole 4d provided in the seat receiver 4 from above, is screwed to the screw hole 712a of the attachment member 71, so that the link element 7a is seated via the attachment member 71. A support 4 is attached.
[0034]
A seat 6 is attached to the seat receiver 4. As described above, the seat portion 6 comprises the cushion body 60 and the shell 61. In order to enable the shell 61 to be detachably attached to the seat receiver 4, as shown in FIG. Protruding portions 62f and 62b are provided on the front end side and the rear end side. On the other hand, the seat receiver 4 is provided with elongated holes 40f and 40b extending in the front-rear direction as shown in FIG. 7 at the corresponding positions of the projecting portions 62f and 62b. Then, the protrusions 62f and 62b of the shell 61 are inserted into the long hole portions 40f and 40b, and an appropriate retaining structure is employed on the insertion end side, thereby restricting upward separation.
[0035]
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 proximal end, and at least a part of the distal end forms a channel shape. It is positioned between the opposing walls 711 of the mounting member 71. At that position, the support shaft 74 is penetrated from one opposing wall 711 of the mounting member 71 to the other opposing wall 711, and the outer surface of the opposing wall 711 of the mounting member 71 is held from both sides while maintaining the penetrating state. As described above, the seat Z is mounted on the mounting member 71, and appropriate portions of the seat Z are attached to the mounting member 71.
[0036]
Therefore, the tip of the link element 7b is positioned between the opposing walls 711 of the mounting member 71, the support shaft 74 is bridged between the opposing walls 711 through the link element 7b, and the opposing wall 711 is held in that state. At the stage where the seat Z is mounted, the support shaft 74 is prohibited from coming out of the opposing wall 711 by the seat Z. 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. In addition, since it is not necessary to secure an unnecessarily large protrusion amount on the penetrating end side of the support shaft 74, it is possible to effectively avoid an unnecessarily large connecting portion.
[0037]
Moreover, since the recess 4b that opens 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 concealed simultaneously, It can be set as the structure which does not impair an external appearance as much as possible.
[0038]
In particular, in this embodiment, the seat Z is composed of a seat portion 6 that is a main body and a seat receiver 4 that receives the seat portion 6. Since the seat 6 is fixed to the mounting member 71 and the seat portion 4 is attached to the seat receiver 4, the mounting work is sequentially performed in a state where it is easy to visually recognize from above, in combination with the fact that no measures are taken to prevent the support shaft 74 from coming off. Can be promoted, and the work can be further simplified.
[0039]
In particular, the link element 7a has a plate-like shape in which a blindfold element 702 is installed between a pair of link portions 701 that are spaced apart from each other in the width direction of the seat portion 6. In addition to concealing a part or all of the internal mechanism provided in the chair, the appearance of the chair can be improved, and the pair of link portions 701 are completely synchronized to increase the rigidity of the link element 7a, while at the same time ensuring its behavior. Can be a thing.
[0040]
As described above, the link element mounting structure, which is a feature of the present invention, is very useful when applied to the link element 7a on the front end side, which controls relatively complicated operations, requires strength, and is arranged at a conspicuous position. Can be.
[0041]
The specific configuration 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]
【The invention's effect】
Since the present invention has the configuration described above, it is unnecessary to provide a special retaining means for the support shaft, and it is possible to simplify the mounting work when the seat is attached to the tip of the link element by the support shaft. it can. Further, since it is not necessary to secure an unnecessarily large protrusion amount on the penetrating end side of the support shaft, the connecting portion can be made compact. Furthermore, since the previous link element is a plate-shaped member in which a blindfold element is installed between a pair of link portions spaced apart in the width direction of the seat, at the same time ensuring the behavior of the link element, The appearance of the chair can be effectively improved through a compact configuration. Therefore, the present invention can be very useful when applied to a link element that supports the front end side of the seat.
[Brief description of the 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 diagram of the operation.
FIG. 5 is an explanatory diagram of the operation.
FIG. 6 is an explanatory diagram of the operation.
FIG. 7 is a plan view showing the embodiment with a seat portion removed.
FIG. 8 is a bottom view showing a seat portion of the embodiment.
FIG. 9 is an exploded perspective view of main parts of the embodiment.
FIG. 10 is a cross-sectional view of the main part.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 4 ... Seat receiver 4b ... Recess 6 ... Seat part 7a ... Link element 71 ... Mounting member 74 ... Support shaft 701 ... Link part 702 ... Blindfold element 711 ... Opposite wall v ... Fixing tool (screw)
Z ... za

Claims (3)

The base leg is supported by the backrest and the seat, and the locking mechanism is configured to lock the backrest and the seat in conjunction by connecting the support base attached to the base leg and the seat with the front and rear link elements. And
Previous link elements, those between the pair of link portions arranged is separated in the width direction of the seat of the blindfolded elements erection and plate-shaped, is rotatably supported a proximal end to a support base, one tip of at least The part is positioned between the opposing walls of the mounting member having a channel shape, and the support shaft is passed through from one opposing wall to the other opposing wall of the mounting member at that position, and the mounting state is maintained while maintaining the through state. A chair, wherein a seat is mounted on the attachment member so as to hold the outer surface of the opposing wall of the member from both sides, and an appropriate part of the seat is attached to the attachment member. The chair according to claim 1, wherein a recess opening downward is formed in the lower surface of the seat, and the attachment member is accommodated in the recess. The seat is composed of a seat portion that is a main body and a seat receiver that receives the seat portion. The seat receiver is mounted on the mounting member, fixed to the mounting member from above with a mounting tool, and the seat portion is attached to the seat receiving member. The chair according to claim 1 or 2, wherein:

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