JP4726338B2 - Chair - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an armrest attached to a symmetrical position of a chair.
[0002]
[Prior art]
Conventionally, a so-called T-shaped armrest is composed of an armrest having an attachment portion attached to a chair and an armrest for placing an elbow of a seated person provided at the upper end of the armrest, and an attachment location provided on a seat support of the chair Moreover, it is normally attached to a pair of left and right. Specifically, the pair of right armrests and left armrests have a symmetrical appearance, and the rear portion of the seat rest is held by a mounting portion projecting toward the seat rest provided at the lower end of the armrest. It is fixed to the chair in the state. Further, in order to position the elbow rest at a substantially central position of the chair where the seated person's elbow can be easily placed, the elbow pad is formed in a state of being inclined in a side view from the mounting portion provided at the rear of the chair toward the front upper side. ing.
[0003]
[Problems to be solved by the invention]
However, since the right armrest and the left armrest are formed symmetrically with different appearance shapes, for example, the right armrest is rotated 180 degrees in the surface direction and attached to the mounting position of the left armrest. Then, since the inclination of the armrest and the shape of the armrest are opposite to each other, the left and right armrests cannot be used together. Therefore, it was necessary to produce separate armrests for the left and right, leading to an increase in production costs.
[0004]
Then, an object of this invention is to provide the chair which attaches the armrest which can reduce a number of parts and can reduce production cost .
[0005]
[Means for Solving the Problems]
Therefore, the present invention provides the following means in order to solve the above-described problems.
In other words, in the chair that detachably attaches the detachable portion of the armrest to the armrest mounting portion provided in the left-right symmetric position, the armrest mounting portion includes a guide portion for guiding the detachable portion to the back, and a back wall. are those with a provided recess, the armrest includes a Hiji桿consists of a elbow elbow that make up a portion of the attached seat occupant to the elbow rod, said elbow lever is detachable portion A base portion is provided at the upper end portion of the elbow strut that is continuously bent and stands up at a substantially right angle, and the detachable portion that is symmetrical in the longitudinal direction so that it can be used for both right and left has a convex portion that can be inserted and removed with respect to the concave portion. The concave portion and the convex portion are provided to engage with the concave and convex portions, and the armrest can be fixed to the armrest mounting portion by a bolt member. The elbow rest is connected to the elbow via the base portion. It ’s designed to be attached to the bag , And the said armrest, without the both left as the seated person right and left each separate shape easy to use, by the elbow rod was both left, in a so-called T-type armrest, reducing the number of parts, production costs Can be lowered.
[0006]
The elbow rest preferably has left and right front portions facing the seated person.
Moreover, as a suitable aspect of an elbow rest, it has a dent part which is a mounting part which comprises a base part and forms the shape corresponding to the said base part in the lower surface position of this base part, and this elbow part has an armrest It is possible to list those that can be mounted by inserting the base part of.
As a specific attachment mode of the armrest, an armrest attachment portion is provided at the left-right symmetrical position, a recess is provided in the back wall of the armrest attachment portion, and a front end surface of the attachment / detachment portion is provided. There can be mentioned those in which convex portions are provided and engaged with the concave and convex portions, and the armrests can be fixed by bolt members.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment for describing the present invention will be described with reference to the drawings. FIG. 1 shows a side view of a chair 1 to which an armrest 9 showing an embodiment for explaining the present invention is attached, and FIG. 2 shows a front view thereof. FIG. 5 is a perspective view of the mounting process of the armrest 9 attached to the chair 1. Hereinafter, a specific configuration will be described in detail.
[0008]
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.
[0009]
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. .
[0010]
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.
[0011]
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.
[0012]
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.
[0013]
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 protrudes 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.
[0014]
As shown in FIG. 4, 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. 40f and 40b are provided, and protrusions (not shown) of the shell 61 are inserted into the long hole portions 40f and 40b, and a structure described later is employed on the insertion end side thereof so that upward separation can be restricted. I have to. Further, a rear base 42 is attached to the rear of the seat receiver 4 so as to support the vicinity of the seated person's ischi via the seat 6. The rear base 42 is rotatably attached to the rear end portion of the seat receiver 4 and changes its angle as the backrest lower frame 50 described later tilts. Long holes 42a are also provided on the left and right sides of the rear base 42, and the rear end portion of the seat portion 6 is slidably screwed through the spacer 42b to prevent the rear end portion of the seat portion 6 from being lifted. I am doing so. Further, an armrest attachment portion 44 for attaching an armrest 9 </ b> A of an armrest 9 to be described later is provided at positions opposite to the left and right side portions of the seat receiver 4. The armrest mounting portion 44 will be described in detail later.
[0015]
The link element 7a 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 rotary shaft 45. is there.
[0016]
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.
[0017]
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.
[0018]
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. .
[0019]
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, and these brackets 550 and 7b1 are overlapped to form a hole portion. The hole 77 is positioned inside the 551 and the pin 76 is inserted. When the pin 76 is inserted into the holes 77 and 551, the link element 7 is moved integrally by restraining b and the backrest upper frame 55, and the pin 76 is moved from the hole 551. By pulling out, the above constraint is released, and only the backrest upper frame 55 is independently rotated about the rotation shaft 72.
[0020]
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.
[0021]
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.
[0022]
Thus, levers 43a, 43b, 43c, and 67 are provided at the front side end of the seat receiver 4 in order to selectively utilize the above mechanisms with the seat 6 attached. The lever 43a is for raising and lowering the seat portion 6, the lever 43b is for tilting only the backrest lower frame 50, and the lever 43c is for the seat portion 6, the backrest upper frame 55, and the backrest lower frame 50 as a whole. It is for interlocking and locking. The tilting of only the backrest upper frame 55 can be performed without a lever operation only when not rocking.
[0023]
Next, the basic operation of the chair 1 configured as described above will be described.
<Elevating operation>
When the lever 43a is not operated, the gas spring 31 is locked and the back seat is fixed at a certain lift position. When the lever 43a is operated from this position, the lock of the gas spring 31 is released, so that the back seat can be moved up and down within a predetermined range with the expansion and contraction of the gas spring 31.
<Locking action>
In a state where all the levers 43a to 43c, 67 are horizontal (initial state), the gas spring 31 provided below the seat portion 6 is in a free state, and the gas spring connected to the backrest lower frame 50 is fixed. It becomes a state. At this time, the pin 76 is inserted into the hole 551 provided in the backrest upper frame 55, and the link element 7 b and the backrest upper frame 55 can be tilted backward about the rotation axis of the torsion bar 70 as a unit. Then, the four-side link mechanism is deformed as the backrest upper frame 55 is tilted backward, and the rocking operation is performed while the seat portion 6 is also tilted backward and downward.
[0024]
On the other hand, when the lever 43c is tilted in a state where it is at a predetermined rearward tilt angle, the gas spring 31 provided below the seat portion 6 is fixed and the gas spring provided below the backrest lower frame 50 is fixed. To maintain the rearward tilt angle in that state.
<Tilting movement only on the backrest>
By tilting the lever 43c in the horizontal state from the initial state, the gas spring 31 provided below the seat portion 6 is locked to fix the movement of the four-side link mechanism, and the gas spring connected to the backrest lower frame 50 is also fixed. State is maintained. Then, the pin 76 is removed from the hole 551 provided in the backrest upper frame 55, so that the backrest upper frame 55 can be elastically tilted backward while the seat portion 6 and the backrest lower frame 50 are fixed.
<Tilting operation only on the lower backrest>
When only the backrest lower frame 50 is positioned rearward, by operating the lever 43b corresponding to this, the fixed state of the gas spring connected to the backrest lower frame 50 is released, thereby rotating the backrest lower frame 50. Is acceptable. Then, the gas spring is fixed by returning the lever 43b to the original state at a predetermined position, and the backrest lower frame 50 is fixed in that state.
<Back and forth movement of the seat>
When the seat portion 6 is slid in the front-rear direction, the regulating piece 66 is retracted from the pinion 63 by operating a lever 67 provided on the seat portion 6 to allow the pinion 63 to freely rotate. Along with this, the seat portion 6 is slid in the front-rear direction, and the lever 67 is returned to the original position at a suitable position so that the restricting piece 66 is engaged with the pinion 63, and the rotation of the pinion 63 is restricted to restrict the seat portion 6. Fix the front and back position of.
[0025]
In the present embodiment, through the above operations, the seat 6 and the backrest 5 are interlocked and locked to selectively relax the seat occupant backward from the normal use position, and only the link element 7b is moved backward. It is to be switched to a mode in which by rotating inclined rearwards only backrest upper frame 55 is refreshed seated person. Further, only the lower back frame 50 is rotated so as to push up the seated person's sciatic bone and press the hipbone, and the seating position can be arbitrarily changed by moving only the seat portion 6 back and forth. Of course, it goes without saying that the height of the back seat can be adjusted.
[0026]
In addition to the configuration as described above, the present embodiment is provided with an armrest mounting portion 44 at a symmetrical position of the seat receiver 4, and the armrest 9 </ b> A is common to both armrest mounting portions 44. 9 can be selectively or simultaneously attached. Hereinafter, a specific configuration will be described.
[0027]
First, as shown in FIG. 4, armrest attachment portions 44 for attaching the armrests 9 of the armrests 9 are provided at symmetrical positions on the left and right sides of the seat receiver 4. The armrest attachment portion 44 is formed of a channel member that receives the attachment / detachment portion 91 provided on the armrest 9A from below, and is provided with a guide portion 44a having an inner surface tapered. In addition, a concave portion 44d is provided in the rear wall (not shown) so that the convex portion 913a provided in the attaching / detaching portion 91 can be engaged with the concave and convex portions, a plurality of screw holes are provided in the side end portion, and the armrest 9A is formed by a bolt member It can be fixed.
[0028]
Further, as shown in FIG. 5, the armrest 9 that can be attached to and detached from the chair 1 in a bilaterally symmetrical position is a so-called T-shaped elbow, an armrest 9A having an attaching / detaching portion 91 attached to the chair, and the armrest 9A. It is comprised from the elbow rest 9B attached to the upper end part of the armature in the state orthogonal to the elbow pad 9A.
[0029]
The armrest 9A is integrally formed of a resin material or the like, and as shown in FIG. 9, the overall appearance is a longitudinally symmetrical shape at the center line O which is the center position in the longitudinal direction. An attachment / detachment portion 91 to be fitted into the armrest attachment portion 44 provided on the seat support 4 is provided, and as shown in FIG. 8, an elbow strut 92 that is continuously bent from one end of the attachment / detachment portion 91 and stands up at a substantially right angle. Is forming. Further, a base portion 93 is continuously provided at the upper end portion of the elbow support 92 so that the elbow rest 9B can be attached.
[0030]
The attaching / detaching portion 91 has a substantially inverted triangular shape when viewed from the side, has an upper surface 911 as a horizontal surface, and has two bottomed grooves 911a opened in a parallel state, and a pair of penetrating nut introduction holes provided in the back thereof. A separate flanged nut member N is fitted in 911b so that the armrest 9 can be fixed to the seat receiver 4 with a bolt member. Further, the lower surface 912 is formed in a taper shape that matches the shape of the guide portion 44 a of the armrest attaching portion 44, and the attaching / detaching portion 91 can be slid to be guided behind the armrest attaching portion 44. . Furthermore, a convex portion 913 a protruding in the seat receiving direction is provided at the lower end portion of the front end surface 913 so that it can be inserted into and removed from the concave portion provided in the armrest attachment portion 44. Further, a step 914 b is provided in the rear 914 so that the armrest 9 can be positioned at a mounting position with respect to the seat receiver 4. The elbow strut 92 rising from the rear of the attaching / detaching portion 91 integrally forms a vertical portion 922 that is substantially perpendicular to the horizontal plane of the attaching / detaching portion 91 via a slightly inclined continuous portion 921. And the upper end part of the vertical part 922 is made to continue from the inner side surface of the lower surface center part of the base part 93 to be described later, and the elbow rest 9B can be attached via the base part 93. The base portion 93 has a left-right anteroposterior symmetrical shape, and its upper surface is a mounting surface having a smaller area than the back surface of the elbow rest 9B. In addition, the rib structure reduces the weight, and screw holes 931 are opened at the four corners symmetrically so that the elbow rest 9B can be screwed.
[0031]
The elbow rest 9B attached to the elbow pad 9A via the base portion 93 has a bilaterally symmetric shape, with the front portion slightly hung down. In addition, an elastomer is integrally molded on a base portion 94 integrally formed of polypropylene to constitute a seated person's elbow rest.
[0032]
As shown in FIG. 7, the base portion 94 has a dent portion 941 that is an attachment portion having a shape corresponding to the base portion 93 at the lower surface position, and the dent portion 941 has a base portion 93 of the armrest 9A. It can be installed by inserting. A nut member 942 corresponding to a screw hole 931 provided in the base portion 93 is attached to the inner surface of the recess portion 941 by an appropriate means such as welding, so that the elbow rest 9B can be screwed from below the base portion 93. Yes.
[0033]
Next, an attachment procedure when attaching the armrest 9 to the chair 1 will be described.
[0034]
First, in order to attach the armrest 9 </ b> A to the seat receiver 4, the lower surface 912 of the attaching / detaching portion 91 provided at the lower end portion of the armrest 9 </ b> A is slid to the guide portion 44 a of the armrest attaching portion 44 provided on the seat receiver 4. Then, the armrest 9 </ b> A is inserted into the back of the armrest attachment portion 44. Then, the convex portion 913a provided at the front end of the attaching / detaching portion 91 is fitted into the concave portion 44d provided at the back of the armrest attaching portion 44, and the lower surface front end surface 44c of the armrest attaching portion 44 is fitted to the step portion 914b of the armrest 9. The armrest 9 is positioned by abutting, and then a bolt member is screwed in from the back surface of the seat receiver 4 and fixed.
[0035]
And the base part 93 provided in the upper end part of the said armrest 9A is inserted in the dent part 941 provided in the downward direction of the said armrest 9, and the elbow rest 9B is made into the armrest 9A via a bolt member from the back surface of the base part 93. Fix it.
[0036]
With the configuration as described above, in the so-called T-shaped armrest, it is possible to realize the armrest 9 that can be used for both right and left, reducing the number of parts and reducing the production cost . In addition , the armrest 9 can be easily attached without worrying about the directionality of the armrest 9 on the left and right when mounting.
[0037]
Further, by making the armrest 9A and the armrest 9B detachable, only the armrest 9A attached to the chair 1 is used for both left and right, and the armrest 9B is not used for both the left and right, and the armrest is adapted to the use of the seated person. Can also be attached.
[0038]
In the above description , the elbow rest 9B has a symmetrical shape at the center position, and the elbow rest 9B can also be used for both the left and right. However, the chair according to the present invention can be replaced with such a configuration. including directing the front portion of 9B to the seating side, as the left and right of each separate shape, so that attaching the accessible elbow 9B of the seated person. Thus, the chair according to the present invention allows the armrest and the armrest to be detachable so that only the armrest attached to the chair can be used for both left and right, and the armrest is not used for both the left and right. The elbow rest is attached. Other configurations can be variously modified without departing from the spirit of the present invention.
[0039]
【The invention's effect】
The present invention is implemented with the configuration as described above, and has the following effects.
[0040]
That is, the present invention provides a chair for detachably attaching an armrest attachment / detachment portion to an armrest attachment portion provided at a symmetrical position, wherein the armrest attachment portion guides the attachment / detachment portion to the back.
A guide portion, which has a recess provided in the deeper wall, the armrest is composed of a Hiji桿, the elbow that make up the elbow portion of the seated person attached to the elbow rod, wherein On the arm
Base portion is provided at the upper end of the armrest support erected substantially at right angles continuously bent from detachable unit, left
The detachable part, which has a symmetrical shape so that it can be used on the right side, can be inserted into and removed from the concave part.
Convex portions are provided, and the concave and convex portions are engaged with the concave and convex portions, and the elbows are
A heel can be fixed to the armrest mounting portion, and the armrest is attached to the armrest via the base portion , and the armrest is used by a seated person Shiya
Without both left as pancreatic left each different shape, characterized in that the both left the elbow rod.
[0041]
Thereby, in what is called a T-shaped armrest, the number of parts can be reduced and the production cost can be reduced.
[0042]
[Brief description of the drawings]
FIG. 1 is a side view of a chair in an embodiment for explaining the present invention .
FIG. 2 is a front view of the chair in the embodiment.
FIG. 3 is an exploded perspective view showing a part of the mechanism in the embodiment.
FIG. 4 is a plan view of a seat in the embodiment.
FIG. 5 is a perspective view of an armrest attachment process in the embodiment.
FIG. 6 is a perspective view of a completed armrest attachment in the same embodiment.
FIG. 7 is a side view of an armrest according to the embodiment.
FIG. 8 is a front view of an armrest in the embodiment.
FIG. 9 is a plan view of an armrest according to the embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Chair 9 ... Armrest 9A ... Armrest 9B ... Armrest 44 ... Armrest attachment part

Claims (3)

In a chair that detachably attaches an detachable part of an armrest to an armrest attaching part provided at a symmetrical position,
The armrest attachment part includes a guide part for guiding the attachment / detachment part to the back, and a recess provided on the back wall,
The armrest is composed of a Hiji桿, the elbow that make up the elbow portion of the seated person attached to the elbow lever,
The said elbow rod, the base portion is provided at the upper end of the armrest support erected substantially at right angles continuously bent from removable portion, said removable portion and the front and rear symmetrical shape to allow both left, the recess Protrusions that can be inserted and removed with respect to the concave and convex portions are engaged with the concave and convex portions, and the armrests can be fixed to the armrest attachment portions by bolt members,
The elbow rest is adapted to be attached to the armpit through the foundation part,
The above-mentioned elbow rest is a chair that is characterized in that the above-mentioned elbow pad is used for both right and left instead of the left and right as separate left and right shapes that are easy for a seated person to use . The chair according to claim 1, wherein the elbow rest has left and right front portions directed toward a seated person. The elbow rest includes a base part, and has a dent part which is a mounting part having a shape corresponding to the base part at a lower surface position of the base part, and the base part of the elbow pad is inserted into the dent part. The chair according to claim 1 or 2, wherein the chair is attached.

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