JP5653601B2 - Armrest device and chair equipped with the same - Google Patents

Description

The present invention relates to an armrest device having a movable armrest and a chair equipped with the armrest device.

In an armrest device for a chair, an elbow rest is configured to be slidable to the left or right, to be slidable back and forth, or to be horizontally rotatable (turnable). There are various combinations of these three movements. Some of them have only one movement, some have two arbitrary movements, and some have a left-right slide and a front-back slide, but do not rotate horizontally.

Patent Document 1 is given as an example of the two movements of front and rear slide and horizontal rotation.
Patent Documents 2 and 3 are examples of three movements. When the elbow rest moves in the three directions of the left / right slide, the front / rear slide, and the horizontal rotation as in Patent Documents 2 and 3, the position and posture of the elbow rest can accurately correspond to the posture and position of the user's arm. This is preferable.

In any case, when the elbow rest is movable, it is necessary to provide a restricting means for holding the elbow rest so that it does not easily move at a desired position or posture. In this regard, there is a type in which a lock device with a push button is provided, but in general, an engaging means having an elastic body or a stopper using friction is used as a restricting means, Although it does not move with very light mosquitoes, it moves against elastic force or frictional resistance when a certain amount of force is applied.

JP 2008-194126 A Japanese Patent No. 4027478 Japanese Patent Publication No. 2001-211962

An armrest device having a movable elbow rest is required to have, for example, simplification of structure, downsizing, certainty of movement of the arm rest, position / posture retention, and robustness. Therefore, from the viewpoint of simplification of Patent Documents 2 and 3 in which the elbow rest performs a left-right slide, a front-rear slide, and a horizontal rotation, first, Patent Document 2 describes a horizontal position holding, a front-rear position holding, and a horizontal position. Since the rotation posture is maintained by separate members, there is a concern that the structure becomes complicated and the assembly takes time.

On the other hand, in patent document 3, since the holding | maintenance of the rotation position of an elbow rest and holding | maintenance of a left-right position are performed by the common member, it has contributed considerably to simplification of a structure. Looking at the posture maintenance function,
In Patent Document 2, the holding of the left-right position and the holding of the front-rear position are performed using friction, and in Patent Document 3, the holding of the horizontal rotation posture and the holding of the left-right position are performed using friction. It can be said that the engagement means using an elastic body is preferable from the viewpoint of the certainty of maintaining the posture.

Next, as disclosed in Patent Document 1, in this publication, a support block having a holding function at the front and rear positions is arranged inside an armrest substrate formed in a shallow tray shape, and fixed to an upward recess formed in the support block. It is described that the horizontal posture of the elbow rest is maintained in stages by fitting a disc and restricting relative rotation between the fixed disc and the support block. Although it can be said that this patent document 1 can be made compact in view of the fact that a plurality of members can be stored within the thickness of the armrest substrate, since the armrest substrate is thick, even when the armrest has a structure that can slide left and right. It is not certain if the thickness can be reduced.

In Patent Document 1, as means for maintaining the relative rotation posture of the support block and the fixed disk, a number of recesses are formed on the outer peripheral surface of the fixed disk, while the recesses of the nationally fixed disk are formed on the support block. A pin that fits in and out and an elastic body that pushes the pin are mounted, but the fixed disk is fitted in the recess of the support block and its upper and lower thickness is limited, so the fitting height between the pin and the recess For this reason, there is a possibility that the rotation posture holding function of the elbow rest cannot be sufficiently achieved.

Further, Patent Document 1 allows the front and rear slide of the armrest board by fitting the support block into the front and rear elongate long holes formed in the armrest board (movable support). The inner part is formed as a thin projecting piece, and this projecting piece is formed in a waveform in plan view in which a number of recesses are continuous, while the support block is integrally formed with a tongue piece that hits the outer surface of the projecting piece, The front and back positions of the armrest substrate are held by using the engagement between the tongue piece and the protruding piece, but the protruding piece has a thin corrugated plate structure and is easily damaged. This also has a problem that it is easily damaged. That is, Patent Document 1 has a question about the robustness of the front and rear position holding means.

This invention is made | formed in view of such a present condition, and makes it a subject to provide the armrest apparatus improved more.

According to the present invention, “a movable support is disposed above a base support disposed on a side of a seat so that the movable support can slide at least forward and backward and horizontally, and an elbow rest is provided on the movable support. The armrest device includes a guide body on which the movable support body is attached to the base support body so as to be freely slidable in the front-rear direction. the body, the longitudinal position holding means for holding the longitudinal position of the movable support stepwise or steplessly, horizontally rotating holding means for holding the horizontal pivoting position stepwise or steplessly in elbow It has a basic structure that “is provided.”

Then, acceptable in the invention is the basic structure of claim 1, wherein the movable support is able to longitudinal slide with it fits upward protrusion of the guide member in the elongated hole of the longitudinal front and rear provided on the movable support And is prevented from falling out by being sandwiched between the regulating body and the movable support body from above and below.
Are, in the upward protrusion of the guide member, as the longitudinal position holding means, the lower surface of the side edge portion of the upper surface or the elongated hole of the side edges of the inner surface or oblong holes in the long hole of the movable support A locking portion is provided on the inner surface of the elongated hole, the upper surface of the side edge of the elongated hole, or the lower surface of the side edge of the elongated hole of the movable support. An engaging portion that engages and holds the front-rear position of the guide body is formed.

An armrest device according to a second aspect of the present invention is the armrest device according to the first aspect, wherein the movable support body is attached to the base support body so as not to slide left and right , and the elbow board is freely movable on the movable support body.
Is disposed, said upwardly projecting portion of the guide body is provided with lateral position holding means for holding the right and left positions of the elbow substrate stepwise or steplessly.

The invention of claim 3 embodies claim 1 or 2, and in this invention, the guide body is formed with a downward convex part that partially enters the base support body from above, and for this reason. The base support has an upward recess into which the downward convex portion of the guide body enters,
When the downwardly projecting portion rotates horizontally within the upward recess, the movable support is allowed to rotate horizontally, and the guide member is provided with a horizontally rotating holding means on the downwardly projecting portion of the base support. A first engaging portion with which the horizontal rotation holding means is engaged is provided in the upward recess of the body.

The invention of claim 4 further embodies the invention of claim 3, and in this invention, each of the posture holding means comprises a block-like elastic body and a pin-like body pressed by the block-like elastic body, The elastic body constituting the front / rear position holding means and the horizontal rotation holding means is fitted in a storage hole formed in the guide body, and therefore the locking portion of the front / rear position holding means is constituted by a pin-like body. .

According to a fourth aspect of the present invention, in the upward recess of the base support member, a first engagement groove into which the pin-like body of the horizontal rotation holding means is fitted and detached is provided as the first engagement portion of the guide body. A plurality of members are provided along the rotation direction, and a second member in which the pin-like member of the front-rear position holding means is fitted and detached as the engaging portion on a portion of the movable support body along the inner periphery of the elongated hole. A large number of engagement grooves are provided along the front-rear direction, and a plurality of third engagement grooves along the left-right direction are provided on the lower surface of the movable support body. ing.

The invention of claim 5 is the invention according to claim 1, wherein the movable support is provided on the upper surface of the side edge of the elongated hole.
An engaging portion is formed that engages with the locking portion of the guide body to hold the front-rear position of the guide body.
.
The present invention also includes a chair. In this chair, as in claim 6 , the armrest device according to any one of claims 1 to 4 is arranged on the left and right outside of the seat, and the base support is an elbow arranged on the left and right outside of the seat. It is attached to the column so that the height can be adjusted or not.

According to the seventh aspect of the present invention, the elbow rest is movable support above the base support disposed on the side of the seat.
Slidable back and forth and left and right slidable through the body and the guide body arranged below
And the guide body is disposed on the base support.
The guide body is mounted so as to be able to rotate flatly, and the horizontal rotation posture of the guide body is gradually adjusted to the guide body.
Or a horizontal rotation holding means for holding in a stepless manner, and a front-rear position of the elbow rest in a stepwise or stepless manner.
The front / rear position holding means for holding in a stepwise manner and the left and right positions of the elbow rests are maintained stepwise or steplessly.
Left and right position holding means is provided.
In this application, the words “front and rear” and “left and right” are used to specify the direction, but this wording is based on the posture of the person using the armrest device. That is, the armrest device is arranged on the left, right, or both left and right sides of a person facing forward, and uses words such as left and right and front and rear based on such directions.

In the first aspect of the present invention, since the functions of the front / rear position holding means and the horizontal rotation holding means are held in the guide body, the elbow rest is an armrest device that at least performs the front / rear slide and horizontal rotation, By reducing the number of points, it can contribute to cost reduction and assembly efficiency improvement.

And in this invention, since the latching | locking part of the front-and-rear position holding means provided in the guide body is applied to the engaging part provided in the inner surface or upper surface or lower surface of the periphery of the elongated hole in the movable support, For example, a simple structure that forms an engaging groove as in claim 4 is sufficient for the part, and therefore, the problem that the engaging part of the movable support is easily damaged can be avoided. On the other hand, the locking portion of the guide body does not need to have a special form as in Patent Document 1, and a simple structure such as that of claim 4 is sufficient, so that it is possible to avoid the inconvenience of being easily damaged. Therefore, according to the invention of claim 1 of the present application, it is possible to contribute to cost reduction and assembly efficiency improvement while securing the robustness of the member.

According to the inventions of claims 2 and 7 , since one guide body controls the holding of the left and right positions of the elbow rest, the holding of the front and rear positions, and the holding of the horizontal rotation posture, the elbow rest is rotated horizontally with the left and right slides and the front and rear slides. Even though it is a high-performance armrest device that moves, it can simplify the structure and reduce the labor of assembly and member management, or contribute to cost reduction.

According to a third aspect of the present invention, the guide body is attached to the base support body so as to be movable horizontally, and the elbow rest is held in a desired horizontal posture by contacting the horizontal support movement holding means of the guide body with the base support body. Therefore, it is possible to eliminate the member corresponding to the fixed disk in Patent Document 1, and this can further contribute to simplification of the structure (reduction of the number of members).

The front-rear position holding means, the horizontal tidal holding means, and the left-right position holding means can adopt various structures. However, if a combination of a block-like elastic body and a pin-like pin-like body is employed as in claim 4, the elastic structure Since an inexpensive material such as urethane rubber can be used as the body, it can contribute to cost reduction. In addition, the block-like elastic body can be held in the guide hole by its elastic restoring force so that it cannot fall off, so that it can be handled with the elastic body and pin-like body set on the guide body during assembly and storage. From this aspect, it is possible to contribute to the reduction of the labor of the member management and the labor of the assembly.

In claim 4, as in a second embodiment to be described later, when the pin-shaped body is applied to the left and right sides of the movable support with the elongated hole interposed therebetween, the movable support is an elastic body via the pin-shaped body. Since it is pushed downward, there is an advantage that rattling can be eliminated.

It is a side view of the chair to which this invention is applied. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the armrest apparatus which concerns on 1st Embodiment, (A) is the perspective view seen from the downward direction, (B) is the separation saddle view seen from the downward direction. It is the isolation | separation perspective view which looked at the armrest apparatus of 1st Embodiment from upper direction. It is a separation perspective view from the upper part centering on the adjustment mechanism. It is the isolation | separation perspective view from the lower part centering on the adjustment mechanism. It is a separation side of an elbow rest movable mechanism. It is a figure which shows an elbow rest movable mechanism, (A) is the isolation | separation perspective view seen from the upper part, (B) is the perspective view from the upper part in the state assembled partially. (A) is a partial separation plan view, and (B) is a partial plan view. It is a separation perspective view for explaining mainly a right-and-left position maintenance mechanism. It is a figure for demonstrating mainly a horizontal rotation mechanism, (A) is the isolation | separation perspective view of the principal part seen from upper direction, (B) is a perspective view in the state which turned over the base support body. It is a figure for demonstrating a back-and-forth slide mechanism, (A) is a perspective view of the principal part, (B) is the isolation | separation perspective view in the state which turned over the movable support body. It is a top view for demonstrating the motion of an elbow rest. It is a separation perspective view of an armrest device concerning a 2nd embodiment. It is a separation perspective view for mainly explaining a right-and-left position holding means. (A) is an exploded perspective view of an armrest device, and (B) is a perspective view of a state in which a slider is turned over. (A) is the isolation | separation perspective view for mainly demonstrating the front-back position holding means, (B) is the perspective view which looked at the movable support body and the base support body from the downward direction. It is a separation perspective view for mainly explaining a right-and-left position holding means. (A) is a separated perspective view of the main member, (B) is a separated perspective view mainly for explaining the horizontal rotation holding means, and (C) is a plan view of the guide body. It is a figure which shows the modification of 2nd Embodiment.

Next, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, this embodiment is applied to a swivel chair that is frequently used for office work. The chair has a leg device 1, a seat 2, a backrest 3, and a back frame 4 for locking the backrest 3, and an armrest device 5 is attached to the back frame 4. Without even described dare, armrest apparatus 5, it is also possible to mount, for example, in members such as the outer shell 6 for supporting the seat 2 from below.

(1). Outline of armrest device For example, as shown in FIGS. 2 to 5, the armrest device 5 has an elbow support 8 fixed to the back frame 4 and a height adjustment to the elbow support 8 as members visible from the outside. It has a lifting case 9 that is freely fitted and mounted, and a longitudinal elbow rest 10 that moves up and down integrally with the lifting case 9. The elbow rest 10 is slidable to the left and right and slides forward and backward with respect to the lifting case 9. There is a relationship of freedom and horizontal rotation (turning).

For example, as shown in FIG. 3, the elbow rest 10 includes an elbow base plate 11 and an elbow top plate 1 disposed on the upper surface thereof.
2 and an elbow pad 13 disposed on the upper surface of the elbow top plate 12. The elbow substrate 11 and the elbow top plate 12 are made of hard resin such as polypropylene, and both are fixed integrally. Specifically, the left and right engaging claws 14 projecting upward at the rear part of the elbow board 11 are fitted into the engagement holes 15 of the elbow top plate 12 so that the rear parts are held inseparable from each other, and the elbow board 11 The front parts are fixed by screwing the left and right screws 16 inserted into the front part from below into the elbow top plate 12.

The elbow pad 13 is made of a soft resin such as an elastomer, and a dovetail-shaped annular groove (not shown) extending along the outer periphery is formed on the lower surface of the elbow pad 13. It is forcibly fitted to the outer periphery. Therefore, the elbow top plate 12 is entirely covered with the elbow pad 13. Needless to say, the armrest 10 does not necessarily have a three-layer structure, and can be a single structure or a two-layer structure.

The elbow support 8 is an aluminum die-cast product (it can also be made of resin), and has a lateral base 8 a fixed to the back frame 4 at the lower end. As shown in FIGS. 4 and 5, the substantially upper half portion of the lift casing 9, and the upper and lower longitudinal guide groove 18 which is opened forward and upward is formed, the stopper arm height for adjusting the guide groove 18 19 is arranged to be movable up and down.

The elevating case 9 is made of resin and has a cylindrical shape with a vertical relationship, and a forward projecting portion 9a is provided at the upper end portion. For this reason, the upper end part of the raising / lowering case 9 has comprised the substantially teardrop type form which narrowed toward this side by planar view. For example, as shown in FIG. 5, a vertically long operation hole 20 is engaged with the lower surface portion of the forward projecting portion 9a and the upper portion of the elevating case 9 continuous therewith.

A lever arm 21 that is long in a substantially front-rear direction is disposed at the upper end of the elevating case 9. The half of the lever arm 21 has become bifurcated in plan view, the support shaft 22 which projects horizontally outward at the rear end of the two-killing portion 21a, a bearing portion of the upward Sekiguchi provided on upper inner surface of the elevator casing 9 23 is fitted from above. The front end of the lever arm 21 is exposed to the front from the operation hole 20 of the elevating case 9.

The upper end of the stopper arm 19 is caught engaged from above in the middle part the front and rear of the lever arm 21. On the other hand, the stopper arm 19 is held to the lifting casing 9 so as to back-and-forth rotation generally about the vertical middle portion. Lever arm 21 has its front end portion is pressed by a spring 25 so as to move downwards freely.

Although details are omitted, when a person hits the front end of the lever arm 21 against the spring 25 and pulls it upward, the stopper arm 19 rotates in the unlocking direction. The provided lock claw 24 is detached from a lock groove (not shown) formed in the elbow support column 8, whereby the elevating case 9 can be raised and lowered. When the finger is released from the lever arm 21 , the stopper arm 19 is pushed to the locked position by the spring 25, and the lock claw 24 fits into one of the lock grooves of the elbow strut 8, whereby the elevating case 9 (and the elbow rest 10). Is held at the desired height.

(2). Movable structure of elbow rest 10 Next, the movable mechanism of the elbow rest 10 will be described. For example, as shown in FIGS. 6 and 7, the movable mechanism that enables the movement of the elbow rest 10 is mainly composed of a base support 27 fixed to the elevating case 9 and the base support 27 horizontally from above. A guide body 28 that is rotatably mounted, and a movable support body 29 that passes through the guide body 28 upward and overlaps the upper end of the elevating case 9 are provided. The base support 27 is a die-cast product, and the guide body 28 and the movable support 29 are resin-molded products. The lateral width and longitudinal length of the movable support 29 are as follows :
It is smaller than that of the elbow pad 10.

For example, as can be understood from FIG. 4 and FIG. 8 , the base support 27 has a substantially teardrop shape in plan view so as to fit completely into the upper end of the lifting case 9, and the lifting case 9 is composed of four screws 30. It is fixed to. The head of the screw 30 does not protrude from the upper surface of the elevating case 9. The base support 27, an upward recess 31 positioned approximately midway section of the elevator casing 9 is formed. The upward recess 31 is basically circular, but as clearly shown in FIG. 10B, a fan-shaped front extension 31a spreading toward the front and a fan-shaped rear extension 31b spreading toward the rear. The first engaging groove 32 having a longitudinally long longitudinal shape is formed at three locations on the inner peripheral surface of the front extension portion 31a, that is, the location of the longitudinal center line of the base support 27 and the left and right front ends thereof. Yes.

On the other hand, for example, as shown in FIGS. 7 and 10, the guide body 28 has a substantially block-shaped form of the front and rear longitudinal, in its lower surface, fitted rotatably upward recess 31 of the base support 27 The whole downward convex part 33 is formed. The downward convex portion 33 is an upward concave portion 31 of the base support 27.
And has a forward extension 33a and a rear extension 33B. However, the left and right lateral widths of the extended portions 33a and 33b in the downward convex portion 33 are considerably smaller than the lateral widths of the expanded portions 31a and 31b in the upward recess 31. Due to this dimensional difference, the guide body 28 (extended The angle at which the elbow rest 10) can be rotated horizontally is regulated.

The guide body 28 has a center hole 34 penetrating the center of the downward projection 33, while the base support 27 has a mounting hole 35 concentric with the center hole 34 of the guide body 28. A T-nut 36 is fitted into the T-nut 36 from below, and a screw 37 inserted from above into the center hole 34 of the guide body 28 is screwed into the T-nut 36. As shown in FIG. 5, the lower surface of the base support 27, two ribs 27a before and after for unrotatably holding the T-nut 36 are formed.

A metal bush 38 is fitted in the center hole 34 of the guide body 28. The lower end of the bush 38 is in contact with the bottom surface of the upward recess 31 in the base support body 27, and the upper end portion is exposed from the upper surface of the guide body 28 as shown in FIG. A regulating body (slider) 39 having a rectangular shape in plan view is fitted in the exposed portion. Regulating body 39 is held so as not to escape with a screw 37 via a washer 40.

The seat surface of the head of the screw 37 is in contact with the upper end surface of the bush 38, and the pressing force accompanying the tightening of the screw 37 does not act on the regulating body 39 and the guide body 28. Therefore, the guide body 28 can rotate horizontally around the bush 38. Further, the guide body 28 has a regulating body 39.
A flat convex portion 41 is formed on which the front surface of the guide body abuts. Therefore, the regulating body 39 is held so as not to rotate relative to the guide body 28. In other words, the relative posture of the guide body 28 and the regulating body 39 in a plan view is always kept constant.

For example, as shown in FIG. 7A, the movable support 29 has a substantially square shape in a plan view and has a tray shape with a shallow upward opening, and a plurality of reinforcing ribs are provided on the inner surface. The movable support 29
Is provided with a longitudinally long slot 43 in which the upper portion of the guide body 28 is fitted, and an enclosing rib 44 is formed so as to surround the elongated hole 43 and allow relative sliding with the restricting body 39. Yes.

Therefore, the movable support 29 is slid back and forth by the guide action with the upward convex portion 41 of the guide body 28, and is held by the restricting body 39 so as not to be removed. A cover plate 45 that closes the long hole 43 is disposed on the lower surface of the movable support 29. The cover plate 45 is fitted in the guide body 28 and hardly or does not slide back and forth. As shown in FIG. 5, a shallow step 46 into which the cover plate 45 is fitted is formed on the lower surface of the movable support 29. Movable support 2
9 is configured to slide back and forth while being in contact with the upper surface of the elevating case 9, and therefore, the support stability of the movable support 29 (and thus the elbow rest 10) is excellent.

As shown in FIGS. 2, 3, and 9, left and right horizontally elongated slots 47 are formed in the front and rear portions of the elbow board 11. An elongated step 47 a is formed in the elongated hole 47, and a rectangular slider 48 is fitted into this step 47 a, and the slider 48 is fixed to the movable support 29 with a screw 49. As shown in FIGS. 4 and 9, a boss 50 into which a screw 49 is screwed is projected upward on the movable support 29, and the pressing force of the screw 49 is applied to the elbow substrate 11 with the slider 48 fastened to the boss 50. Not acting on. For this reason, the elbow rest 10 can be freely slid left and right.

(3). Elbow rest position / posture holding means As described above, the guide body 28 is attached to the base support body 27 so as to be only horizontally rotatable, and the movable support body 29 is attached to the guide body 28. Only sliding back and forth is possible, and the elbow board 11 is only moved left and right with respect to the movable support 29. Accordingly, as shown in FIG. 12A, the elbow rest 10 can be horizontally rotated within a predetermined angle range, and can be slid forward and backward and left and right as shown in FIGS. 12B and 12C. is there.

Next, a holding means for holding the elbow rest 10 at a desired position will be described. For example, as shown in FIG. 10, a first storage hole 52 opened upward in a square shape in plan view is vacated at a portion of the guide body 289 between the center hole 34 and the upward convex portion 41, and this first storage hole 52 is open. Square block-shaped first
The elastic body 53 is pushed in and stored. A vertically long first window hole 54 that is related to the rear is passed through the first storage hole 52, and a round pin-shaped first pin-like body 55 is fitted into the first window hole 54 from the inside. .

The first pin-like body 55 is exposed on the rear side, and this first pin-like body 55 is the base support 27.
By fitting in the first engagement groove 32 formed in the upward recess 31, the rotation postures of the guide body 28 and the elbow rest 10 are maintained. When a certain amount of rotational force is applied to the elbow pad 10, the first pin-like body 55 compresses the l-th elastic body 53 and moves backward, thereby allowing the elbow pad 10 to rotate. The number of first engaging grooves 32 is not limited to three, and may be two or four or more.

Further, the first storage hole 52 of the guide body 28 has a vertically long second window hole 5 that is associated with the left and right outer sides.
6 communicates with each other, and the second pin-like bodies 57 are formed in the left and right second window holes 56 from the inside. The second pin-shaped member 57 is an example of the engaging portion constituting the longitudinal position holding means.

As clearly shown in FIG. 11 (A), the second pin-shaped body 57 is exposed to the left and right outer sides, while for example, as clearly shown in FIG. A large number of second engagement grooves 58 are formed in the side surface along the longitudinal direction thereof, and the elbow rest 10 applies a certain amount of force by fitting the second pin-like body 57 into the second engagement groove 58. Unless it is applied, it is held in a state where it does not move back and forth. The second engagement groove 58 is an example of the engagement portion constituting the longitudinal position holding means.

The first window hole 54 and the second window hole 56 of the guide body 28 are vertically long, and therefore the pin-like bodies 55 and 57 are fitted in a vertically rotatable state so as to be capable of flat rotation. For this reason, the elbow rest 10 can be smoothly rotated and moved back and forth. Incidentally, window holes 54 and 56, the pin-shaped member 55, 57 is set so as not to come out to the outside is preferred.

For example, as shown in FIG. 10A, the upward convex portion 41 of the guide body 28 is formed with a second storage hole 59 having a square shape in plan view, and the second elastic body 60 and the second storage hole 59 are formed in the second storage hole 59. A pin-shaped third pin-shaped body 61 is fitted with the third pin-shaped body 61 facing up. The second storage hole 59, the second elastic body 60, and the third pin-like body 61 are long in the front-rear direction, and the third pin-like body 61 can expose about half and rotate about the axis. In the state, it is fitted in the second storage hole 59. As shown in FIG. 9, three third engagement grooves 62 into which the third pin-like bodies 61 are selectively fitted are formed on the lower surface of the elbow board 11. The third engagement groove 62 is a rectangular recess 1
1a is formed.

The third engagement groove 62 extends long in the front-rear direction. This is to allow the elbow rest 10 to move back and forth together with the movable support 29. The third engagement grooves 61, it is also possible to form two or four or more. In the present embodiment, the engagement grooves 32, 58, 61 are formed in an arc shape, but other forms such as a V shape may be used. Elastic bodies 53 and 60 uses a soft material such as urethane rubber.

The first elastic body 53 and the first pin-shaped body 55 are specific examples of the horizontal rotation holding means described in the claims, and the first elastic body 53 and the second pin-shaped body 57 are described in the claims. The second elastic body 60 and the third pin-like body 61 are specific examples of the left and right position holding means described in the claims.

(4) Summary / Advantages of Embodiments As described above, the left and right positions, the front and rear positions, and the rotation posture of the elbow rest 10 are held by the single guide body 28, so that the structure is simplified. Become. In particular, it is particularly preferable to press the first pin-like body 55 and the second pin-like body 57 with one first elastic body 53 as in the present embodiment because the number of members can be further suppressed. Although it is possible to use a spring such as a coil spring or a leaf spring as the elastic body, if a soft material such as rubber is used as in the present embodiment, it can be prevented from falling out of the storage holes 52 and 59. There is an advantage that the labor of assembly and storage can be suppressed.

The front / rear slide of the movable support 29 is performed by the guide body 28 that is long in the front / rear direction, and furthermore, a sufficient dimension can be secured as the vertical fitting depth between the movable support 29 and the guide body 28. The body 29 can be smoothly slid forward and backward, and has excellent splendor. Similarly, since the left and right movement of the movable support 29 is guided by the slider 48 fitted in the elongated hole 47 of the elbow board 11, the movement of the left and right slide is also smooth.

Further, the base support 27 is concealed inside the elevating case 9 and the guide body 2
8 has entered the interior of the base support 27, and therefore a part of the guide body 28 has entered the interior of the elevating case 9, so that the armrest device 5 is located above the elevating case 9. The part can be made as thin and compact as possible.

In Patent Document 2, it can be said that the armrest saboter 20 corresponds to the movable support body 29 of the present embodiment. However, the armrest saboter 20 of Patent Document 1 is held by the elbow strut 7 by the longitudinal slider 23 via an elastic body. Therefore, it can be said that there is a contradiction between the ease of sliding back and forth of the elbow rest and the certainty of holding the front and back positions. That is, if the elastic force with respect to the armrest saboter 20 is strong, the reliability of the position retention is increased, but the ease of sliding back and forth is impaired. If the elastic force with respect to the armrest saboter 20 is weak, the ease of sliding back and forth is increased. Holding certainty is reduced.

On the other hand, in this embodiment, the restricting body 39 prevents the movable support 29 from coming off, and no pressing force acts on the movable support 29. Further, since the second pin-like body 57 is fitted into and detached from the second engagement groove 58, the reliability of holding in the front-rear position is excellent.

In Patent Document 2, in order to horizontally slide the armrest 10, the horizontal movement slider elbow is fixed with screws, there is a problem that is a freely growing Therefore the number of members,
In the present embodiment , the elbow board 11 is allowed to move left and right by making the left and right elongated holes 47 open, and therefore, a member corresponding to the left and right slider of Patent Document 2 is unnecessary. Yes, as a result, the structure can be simplified.

Further, in Patent Document 2, the front and rear left and right sliders are pressed against the armrest saboters via the friction body, and therefore the friction of the front and rear friction bodies acts as a resistance against the left and right movement of the elbow rest. If the frictional resistance of the friction body is different, there is a possibility that the left and right slides are easily distorted. On the other hand, in the present embodiment, the resistance to the lateral movement of the elbow rest 10 is generated only by one third pin-like body 61 that is in contact with the lower surface of the elbow base plate 11.
0 can be smoothly slid without twisting.

Further, the elbow board 11 moves back and forth with the third pin-like body 61 fitted in the third engagement groove 62, but in this case, the third engagement groove 62 and the third pin-like body 61 have friction. Since there is almost no resistance, the 3rd pin-shaped body 61 does not act as resistance with respect to the back-and-front slide of the elbow rest 10.

(5). Second Embodiment Next, a second embodiment shown in FIG. In the second embodiment, members having the same functions as those in the first embodiment use the same reference numerals as those in the first embodiment, and description thereof is omitted unless particularly necessary. In the second embodiment, as in the first embodiment, the elbow rest performs a front / rear slide, a left / right slide, and a horizontal rotation, and the function of the movement and the member that controls the same are the same as in the first embodiment. However, there are some differences. The description will focus on the differences.

In the present embodiment, the specific structure for sliding the elbow rest 10 left and right is different from that of the first embodiment. First, this point will be described. As shown in FIG. 13, a long hole 47 is formed in the elbow base plate 11 and a slider 48 is fitted into this from above, but as shown clearly in FIG. A longitudinal auxiliary slide body 65 is dressed in the longitudinal longitudinal recess 64 formed in the above, and a square projection 66 provided on the slide auxiliary body 65 is fitted into the elongated hole 47 of the elbow board 11. The square protrusion 66 of the slide auxiliary body 65 is swallowed by a square boss 67 formed at the source 64 of the movable support body 29. Therefore, the slide auxiliary body 65 is held so as not to be displaced. The screw 49 is screwed into the square boss 67.

When the slide auxiliary body 65 is used as in this embodiment, there is an advantage that the left and right slide of the elbow rest 10 can be performed very smoothly by using a resin material having a small friction coefficient for the slide auxiliary body 65. In addition, since the posture of the elbow board 11 is held by the left and right square protrusions 66, the elbow board 11 can be slid left and right without twisting. From this surface, the left and right slide is extremely smooth.

As the next difference, in the present embodiment, as shown in FIG. 14, the third pin-like body 61 constituting the left and right position holding means is fitted into the third source 68 formed at the front end portion of the movable support 29, The third pin-like body 61 is fitted in the third engagement groove 62 of the armrest plate 11. Third recess 6
A cylindrical third dedicated elastic body 69 is fitted and attached to 8, and an upward biasing force is applied to the third pin-shaped body 61. In the present embodiment , the third pin-like body 61 and the third engagement groove 62 are provided near the front end of the movable support 29 and the elbow board 11, but as described above, the elbow board 11.
There is no hindrance to the positioning function because it slides to the left and right without bending. Of course, the set of the third pin-like body 61 and the third engaging groove 62 can be provided on both the front and rear sides of the elongated hole 47.

For example, as shown in FIG. 14 and FIG. 17, an upward projecting shape 29 a is formed on the left and right outer portions of the elongated hole 47 in the movable support 29, while the elbow substrate 11 can be understood from FIG. 17.
A recess 70 is formed in which the ridge 29a of the movable support 29 is trapped.

Next, in this embodiment, the specific structure of the front and rear position holding means is different. This point will be described next. For example, as clearly shown in FIG. 15A, the second engagement grooves 58 are appropriately spaced in the front-rear direction on the upper surface of the portion of the movable support 29 located on the left and right sides of the elongated hole 47 (that is, the inner portion). It is formed in a jump. Each of the second engagement grooves 58 has a horizontally long posture, and the left and right second engagement grooves 58 are set as a set, and the second engagement grooves 58 are arranged so as to straddle the long hole 47. The made second pin-like body 57 is fitted from above.

The upward convex portion 41 of the guide body 28 has an upward opening groove 72 into which the second pin-shaped body 57 is fitted from above, and a second dedicated elastic body 73 that holds and holds the second pin-shaped body 57 downward. A storage hole 74 of an upwardly-facing entrance is formed. The storage hole 74 and the upward opening groove 72 are connected and integrated. The second dedicated elastic body 73 has a columnar shape and is covered with the storage hole 74 with its axis line in a horizontal posture. When assembling the armrest device, the elbow board 11 is fitted into the upward convex portion 41 of the guide body, and then the second pin-like body 57 is fitted into the upward groove 72, and then the second dedicated elastic body is inserted into the storage hole 74. 73 is announced, and then the regulating body 39 is fastened with the screw 37.

Therefore, the second dedicated elastic body 73 is Ri Contact is maintained pressed from above by the restriction member 39, FIG. 15 (B
), A fitting hole 75 into which the upper end portion of the upward convex portion 41 of the guide body 29 is fitted is provided on the lower surface of the regulating body 39. By means of this outermost hole 75, the restricting body 39 can be
9 is accurately positioned.

A first dedicated elastic body 76 is also fitted in the storage hole 74 of the guide body 29. First exclusive elastic body 7
Reference numeral 6 denotes a cylindrical shape, which is located below the second dedicated elastic body 73. Further, the first dedicated elastic body 76 is arranged in a posture in which the axis is made substantially vertical. The storage hole 74 has a first bin 5
A first window hole 54 into which 5 is fitted is formed. The first window hole 54 communicates with the storage hole 74 and is formed at a portion on the opposite side of the rotation axis of the guide body 29 with the storage hole 74 interposed therebetween.

As clearly shown in FIG. 18B, the first window hole 54 extends to the downward projection 33 of the guide body 29, and opens to the outside at the location of the downward projection 33. As a result, the first bin 5
5 is allowed to fit into the first engagement groove 32 of the base support 27.

In the second embodiment, each pin-like body 55, 57, 61 is a separate dedicated elastic body 69, 7 respectively.
Since it is biased at 3,76, high durability can be secured. Moreover, each exclusive elastic body 69,7
3 and 76 are of the same diameter. For this reason, the dedicated elastic bodies 69, 73, 76 can use a common stick-shaped rubber material, and as a result, can contribute to cost reduction. Each dedicated elastic body 69,7
If 3 and 76 are set to have the same diameter and the same size, it is preferable because the labor of management can be saved.

(6). Modification FIG. 19 shows a modification of the second embodiment. That is, in this modification, the left and right long guide ribs 65a are formed on the slide auxiliary body 65, while the elbow base plate 11 has the guide ribs 6a.
A guide piece 11b interposed between 5a and the square protrusion 66 is provided. If this modified example is adopted, the elbow board 11 can be smoothly slid left and right without any play that rotates horizontally.

The illustrated slide assisting body 65 is located at the front, and therefore the guide rib 65a is provided on the inner side near the rotation center. The guide rib 65a and the guide piece 11b are an example of a guide means for sliding left and right, and the guide rib 65a can be provided on both the front and rear sides of the slide auxiliary body 65.

(7). Others The present invention can be embodied in various ways other than the above embodiment. For example, it can be applied to a type in which the elbow rest does not move up and down. When applied to a chair, it can be applied not only to a rotary chair but also to various chairs such as a fixed chair. In the non-lifting armrest device, the upper part of the elbow post may be formed with the base support, and in the case of the lifting armrest device, the base support may be formed integrally with the lifting case.

The present invention is highly useful when applied to an armrest device for a chair. Therefore, it can be used in the furniture industry centering on chairs.

DESCRIPTION OF SYMBOLS 5 Armrest apparatus 8 Elbow support | pillar 9 Lifting case 10 Elbow pad 11 Elbow base plate 12 Elbow top board 13 Elbow pad 27 Base support body 28 Guide body 29 Movable support body 31 Upward recessed part 32 of a base support body As an example of a 1st engaging part First engaging groove 33 of the guide body downward convex portion 39 restricting body
41 Upper convex portion 43 of guide body 43 Long hole 47 of movable support 48 Long hole 48 of elbow board Slider 52, 59 Storage hole 53 First elastic body 55 that serves as part of horizontal rotation holding means and front-rear position holding means Horizontal First pin-like body 57 constituting rotation holding means Second pin-like body 60 constituting front-and-rear position holding means Second elastic body 61 constituting left-right position holding means Third pin-like body constituting left-right position holding means 69, 73, 76 Dedicated elastic body

Claims (7)

Armrest above the base support located on the side of the seat, the movable support is arranged so as to at least the longitudinal slide and the horizontal pivot is provided with armrest on the movable support, in that A device,
A guide body is attached to the base support body so that the movable support body is slidably movable back and forth. The guide body is attached to the guide body in a stepwise manner. Alternatively, in a configuration in which front and rear position holding means for holding in a stepless manner and horizontal rotation holding means for holding the horizontal turning posture of the elbow rest in a stepwise or stepless manner are provided,
The movable support body is allowed to slide back and forth by fitting an upward convex portion of the guide body into a longitudinally long slot provided in the movable support body, and a regulating body and the movable support body The upper protrusion of the guide body is used as the front-rear position holding means, and the upper surface of the inner surface of the elongated hole or the side edge of the elongated hole is provided as the front-rear position holding means. Alternatively, there is provided a locking portion that hits the lower surface of the side edge of the elongated hole, and on the inner side surface of the elongated hole, the upper surface of the side edge of the elongated hole, or the lower surface of the side edge of the elongated hole of the movable support. The engaging portion for engaging the engaging portion of the guide body to hold the front and rear positions of the guide body is formed.
Armrest device. The movable support may be mounted so as not to left and right slide base support, said movable supporting
An elbow board is arranged on the holding body so as to be movable left and right, and the elbow board is formed on the upward convex portion of the guide body.
A left and right position holding means for holding the left and right positions of the substrate stepwise or steplessly is provided.
The armrest device according to claim 1. The guide body has a downward convex part that partially enters the base support body from above, and therefore the base support body has an upward recess into which the downward convex part of the guide body enters, Horizontal rotation of the movable support is permitted by the horizontal movement of the downward convex portion in the upward recess,
And the horizontal rotation holding means is provided in the downward convex part of the guide body, and the first engagement part that the horizontal rotation holding means engages is provided in the upward recess of the base support.
The armrest device according to claim 1 or 2. Each of the posture holding means is composed of a block-like elastic body and a pin-like body pushed by the block-like elastic body, and the elastic bodies constituting the front-rear position holding means and the horizontal rotation holding means are formed in the guide body. While being fitted into the storage hole, the locking portion of the front-rear position holding means is composed of a pin-shaped body,
In the upward recess of the base support member, a plurality of first engagement grooves as the first engagement portions, into which the pin-like bodies of the horizontal rotation holding means are fitted and detached, are arranged along the rotation direction of the guide body. Provided,
A large number of second engagement grooves along the front-rear direction are provided on the portion of the movable support body along the inner periphery of the elongated hole as the engagement portion, from which the pin-like body of the front-rear position holding means is removed. And
Furthermore, a plurality of third engagement grooves are provided on the lower surface of the movable support body along the left-right direction to which the pin-like body of the left-right position holding means is fitted and detached.
The armrest device according to claim 3. An engaging portion of the guide body engages with an upper surface of a side edge portion of the elongated hole in the movable support body to guide the guide.
An engaging portion is formed to hold the front and back position of the body,
The armrest device according to claim 1. The armrest device according to any one of claims 1 to 5 is disposed on the left and right outer sides of the seat,
The base support is attached to the elbow struts on the left and right outside of the seat so that the height can be adjusted or the height cannot be adjusted.
Attached,
Chair.   Above the base support located on the side of the seat, an elbow rest is placed on the movable support and below it.
Can be slid forward and backward, slidable left and right, and horizontally pivotable via a placed guide body
A configuration that is arranged,
The guide body is attached to the base support body so as to be horizontally rotatable.
A horizontal rotation holding means for holding the horizontal rotation posture of the guide book stepwise or steplessly;
Front / rear position holding means for holding the front / rear position of the elbow rest stepwise or steplessly, and the elbow rest
Left and right position holding means for holding the left and right positions of stepwise or steplessly,
Armrest device.

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