JP5837802B2 - Armrest device - Google Patents

Description

  The present invention relates to an armrest device capable of adjusting the height of an elbow rest member.

  In general, an armrest device that can adjust the height of an elbow rest member has a basic configuration in which an elevating case (elevating body) is fitted to an elbow strut so as to be movable up and down and an elbow rest is attached to the elevating body. A lever or push button as an operating means is provided on the lower surface of the elevator or elbow rest, and when the fingertip is pressed against the lever or pushbutton and pressed, the elevator becomes free to move up and down. When released, the lifting body is held in a locked state where it cannot be lifted.

  In Patent Document 1, the elbow strut includes a fitting hole that opens on the upper surface and extends along the protruding direction of the lifting body (sliding member), and a spacer member that is detachably fixed to the inner surface of the fitting hole. . The spacer member is composed of a front half body and a rear half body. The lifting body has a cylindrical shape with a square cross section, and the lower end thereof is opened. Similarly, the lifting body is provided on the inner diameter portion of the cylindrical cover body having the lower end opened. When the elevating body is inserted into the fitting hole, the front surface of the slide member is set in surface contact with the rearward inner surface of the front half split body, and the rear surface of the elevating body is set in surface contact with the front inner surface of the latter half split body. A vertically long transmission arm (stopper arm) as a height position holding means of the lifting body is inserted into the inner diameter part of the slide member, and the upper and lower middle parts of the transmission arm are rotated to the lifting body through pins that are supported by the lifting body. Mounted freely.

  The claw portion provided at the lower end of the transmission arm can be selectively fitted into a plurality of through-hole-shaped recesses provided on the front inner surface of the rear half split body and intermittently provided along the protruding direction. The transmission arm is biased in a direction in which the claw portion is fitted into the recess by an elastic body such as a spring. The rear end of the operation button provided at the upper front end of the cover body that fits externally on the elbow strut passes through the insertion hole formed in the slide member and faces the inner diameter part of the lifting body. The upper side surface is pressed, rotates about the pin against the elastic body biasing force, and the claw portion is configured to be removed from the recess.

  Further, the lifting / lowering means for the lifting / lowering direction of the lifting / lowering body with respect to the elbow struts causes both ends of the pin to protrude from the outer peripheral surface of the lifting / lowering body by an appropriate size, and this protruding portion is formed in a recessed manner on the inner surface facing the spacer member If the protruding part hits the upper end of the concave groove, the upward protrusion of the lifting body is restricted, and if the protruding part hits the lower end of the concave groove, the further lifting body The insertion to the lower side of is restricted.

Japanese Patent No. 3745570 (see FIGS. 2 to 5)

  However, in the configuration of Patent Document 1, the vertically middle part of the vertically long transmission arm is rotatably mounted on the inner diameter part of the lifting body via a pin that is penetrated and supported by the hollow cylindrical lifting body, and the transmission is performed. Since the vertical length of the arm is shorter than the vertical length of the lifting body, it is difficult to position the transmission arm so that the middle part of the transmission arm is aligned with the pin mounting part. Since it is used to prevent the lifting body in the lifting direction, it is difficult to set the pin length and the amount of protrusion from the outer surface of the lifting body to the specified one. There was a problem that workability was bad.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an armrest elevating device that has a simple configuration and improved assembling workability.

  In order to achieve the above object, according to the first aspect of the present invention, an elevating body having an elbow rest member at an upper end is mounted so as to be movable up and down with respect to an elbow strut, and a stopper arm disposed on the elevating body is operated. By doing so, it is an armrest device that holds the elevating body in a plurality of positions stepwise with respect to the elbow strut, wherein a supported portion is formed at the upper end portion of the stopper arm, and the upper and lower middle portions of the stopper arm Is formed with a swollen portion as a center of rotation, and the lifting body below the elbow rest member is supported so that the supported portion can be slid only in the lateral direction intersecting the lifting direction of the lifting body. A suspension support portion for turning the stopper arm about the bulging portion is formed on the elevating body, and the supported portion is moved to the side by an operating member. The stopper when pressed in the direction When over arm is rotated, the lower and the armrest support and the lifting member engaging portion is released of the stopper arm is made vertically movable.

  According to a second aspect of the present invention, in the armrest device according to the first aspect, the stopper arm is disposed on an inner diameter portion of the elevating body, and the engagement portion is an engagement formed at a lower portion of the stopper arm. And a plurality of engaging recesses provided on the elbow struts and formed at appropriate intervals along the ascending / descending direction of the elevating body, and the operation member includes the supported portion of the stopper arm. The pressing part to press is provided.

  According to a third aspect of the present invention, in the armrest device according to the first or second aspect, the outer peripheral surface of the bulging portion is formed in an arc shape, and the rotation support portion for rotating the stopper arm includes: Of the outer peripheral surface of the bulging part, it is formed so as to slidably support only one of the side close to the suspension support part or only the side far from the hanging support part.

  According to a fourth aspect of the present invention, in the armrest device according to any one of the first to third aspects, the stopper arm or the elevating body is configured to engage the engagement claw portion with the engagement recess. A biasing means for biasing is provided.

  According to the first aspect of the present invention, the supported portion is formed at the upper end portion of the stopper arm provided in the elevating body, and the bulging portion serving as the rotation center is formed at the upper and lower middle portions of the stopper arm. The lifting body below the elbow rest member is provided with a suspension support section for slidably supporting the supported portion only in a lateral direction intersecting with the lifting direction of the lifting body. Is formed with a rotation support portion for rotating the stopper arm around the bulging portion, and the stopper arm rotates when the supported portion is pressed in the lateral direction by the operation member. Then, since the engaging part between the lower part of the stopper arm and the elbow support is released and the lifting body can be raised and lowered, the stopper arm is attached to the lifting body so that it cannot be dropped by the hanging support part of the hanging support body. be able to. Further, the rotation position of the stopper arm is determined by the rotation support portion formed on the lifting body. Therefore, the structure of the armrest lifting device is simplified, and the assembling work of the stopper arm to the lifting body is simplified.

  According to the second aspect of the present invention, the stopper arm is disposed on the inner diameter portion of the lifting body, and the engaging portion is provided on the engaging claw portion and the elbow strut formed on the lower portion of the stopper arm. A plurality of engaging recesses formed at appropriate intervals along the ascending / descending direction, and the operating member is provided with a pressing portion for pressing the supported portion of the stopper arm. On the other hand, the mounting height of the engaging claw portion of the stopper arm can be determined in the engaging concave portion provided in the elbow strut only by mounting the stopper arm.

  According to a third aspect of the present invention, the outer peripheral surface of the bulging portion is formed in an arc shape, and the rotation support portion for rotating the stopper arm is the suspension of the outer peripheral surface of the bulging portion. Since either one of the side close to the support or only the side far from the support is slidably supported, if there is a rotation support only on the side close to the suspension support, stop the stopper arm. What is necessary is just to insert from the lower part of a raising / lowering body, and when there is a rotation support part only in the side far from a suspension support part, what is necessary is just to insert a stopper arm from the upper part of an elevator body, and the height position of the rotation fulcrum of a stopper arm is Easy determination and easy assembly workability.

  According to a fourth aspect of the present invention, the stopper arm or the elevating body is provided with a biasing means for biasing the engagement claw portion into a posture to engage with the engagement recess. Therefore, the urging means can be easily assembled.

It is a side view of an armrest device. It is a front view of an armrest device. It is a top view of the armrest apparatus except the upper member of the armrest member. It is a component exploded view of an armrest device. FIG. 5 is a cross-sectional view taken along line VV in FIG. 2. FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. 5. It is a perspective view which shows a pair of half body of a spacer member. It is a disassembled perspective view of a stopper arm, a raising / lowering body, and an operation member. It is a perspective view of a suspension support body and a stopper arm. It is a perspective view of the stopper arm and operation member with which the suspension support body was equipped. It is a side view of the stopper arm and operation member with which the suspension support body was equipped. It is a perspective view which looks at the inner side of an operation member. It is a perspective view of the member with which the upper part side of a suspension support body is equipped.

[Configuration of lifting device for lifting body]
Next, the structure of the armrest apparatus of this invention is demonstrated, referring drawings. As shown in FIGS. 1 to 4, the armrest device 1 can move up and down with respect to the elbow strut 2 having base ends attached to the left and right sides of a chair seat or seat receiver (not shown). And an elevating body 3 to be mounted on. As will be described later, the elbow rest member 4 is rotated laterally (in a direction crossing (orthogonal to) the lifting / lowering direction of the lifting / lowering body 3) at the upper end of the lifting / lowering body 3 so that the orientation can be adjusted and held. Installed. The elbow rest member 4 comprises an elbow rest base member 4a and a pad member 4b fitted so as to cover the upper surface thereof. Hereinafter, right and left means the left and right direction when viewed from a person sitting on the chair body, front and rear (front and rear direction) means a direction perpendicular to the left and right direction, and front (front direction) means a person sitting on the seat body. Say the front side.

  The base end 2a of the elbow strut 2 extends in the lateral direction. The column portion 2b extending substantially linearly upward from the base end portion 2a is formed in a cylindrical shape on which a substantially cylindrical lifting body 3 is mounted so as to be movable up and down.

  A fitting hole 5 penetrating vertically is formed in the inner diameter of the support column 2 b, and a spacer member 6 is inserted and fixed in the fitting hole 5, and the elevating body 3 moves up and down in the inner diameter part of the spacer member 6. Insert freely. In the embodiment, the spacer member 6 includes a pair of half-cylindrical halves 6a and 6a divided into two along the central axis of the fitting hole 5, and the halves 6a and 6a have the same shape. As a result, the cost of the spacer member 6 can be reduced by using only one type, and the assembly work can be simplified and the spacer member 6 can be prevented from being erroneously attached to the armrest devices arranged on the left and right sides of the chair. ing.

  As shown in FIG. 7, a semi-annular collar portion 7 is formed at the upper end portion of the halved body 6 a so as not to fall downward from the upper end of the support column portion 2 b. Protrusions 8a are formed on one of the halved end surfaces of both flanges 7, and engagement recesses 8b are formed on the other of the halved end surfaces (only one halved body 6a is shown in FIG. 7). Thus, when the pair of halves 6a, 6a are combined, the projection 8a in one half 6a and the engagement recess 8b in the other half 6a are fitted and do not shift in position. .

  As shown in FIG. 7, the elastic engagement which elastically engages with the step part 9 provided in the lower end of the internal diameter (fitting hole 5) of the support | pillar part 2b in the lower part of the outer peripheral surface of each half member 6a. A plurality of claws 10 are provided. Furthermore, the engagement recesses 11 are formed in each half 6a along the longitudinal direction (vertical direction) at appropriate predetermined intervals. In the embodiment, each engagement recess 11 passes through a half-cylindrical wall plate of each half-divided body 6a. Further, a plurality of elastic protruding tongues 12 are provided on the inner diameter side of the half-cylindrical wall plate of each half-divided body 6a in the vertical direction of the half-divided body 6a, so that it is fitted to the inner diameter portion of the spacer member 6 and moves up and down. This prevents rattling of the elevating body 3 when doing so.

  In addition, as shown in FIG. 8, the longitudinally long guide groove 34a is provided only in the upper half part of the cylindrical part on the outer peripheral side surface of the cylindrical part of the lifting body 3. On the other hand, a stopper projection 34b that fits into the longitudinal guide groove 34a is formed at the upper end of the inner surface of the half member 6a corresponding to the longitudinal guide groove 34a (see FIG. 7). This prevents the vertically long guide groove 34a from colliding with the stopper projection 34b at the upper limit position of the lifting body 3 to prevent the lifting body 3 from further rising, and hence the lifting body 3 from coming out of the column portion 2b. it can. As for the mounting order, after the spacer member 6 is externally fitted to the elevating body 3, these are integrally inserted from the upper end of the fitting hole 5 of the support column 2b.

  The stopper arm 13 disposed on the inner diameter portion of the elevating body 3 has a main body 13 a that is a vertically long rod-like body, a supported portion 14 is formed at the upper end portion thereof, and an engaging claw portion 15 at the lower portion of the stopper arm 13. Is formed. The engaging claw portion 15 selectively engages with one of the plurality of engaging recesses 11 formed at appropriate intervals along the ascending / descending direction of the elevating body 3 in the spacer member 6. The engagement claw portion 15 and the engagement recess 11 correspond to the engagement portion described in the claims. A bulging portion 16 serving as a rotation center is formed in the middle of the upper and lower portions of the main body 13a of the stopper arm 13.

  A lifting support body provided below the elbow rest member 4 is provided with a suspension support section 18 for supporting the supported portion 14 so as to be slidable only in the lateral direction crossing the lifting direction of the lifting body 3. 17 is fixed (see FIGS. 5, 6, and 8 to 11). The lifting body 3 is formed with a rotation support portion 20 for rotating the stopper arm 13 around the bulging portion 16. Further, an operation member 21 for operating the supported portion 14 of the stopper arm 13 is provided adjacent to the suspension support body 17.

  Below, the detailed structure of each member is demonstrated. In the embodiment, the bulging portion 16 is formed integrally with the main body 13a of the stopper arm 13 so as to form a part of a disk. Similarly, the supported portion 14 and the engaging claw portion 15 are integrally formed with the main body 13 a of the stopper arm 13. Further, a bar-like spring body 19 as a biasing means extending downward is formed integrally with the main body 13a on the side surface opposite to the protruding side of the engaging claw portion 15 in the middle part of the stopper arm 13 in the vertical direction. Yes. In the embodiment, the suspension support portion 18 in the suspension support body 17 has concave grooves 22 that are recessed in the left and right sides that intersect with the sliding direction of the supported portion 14. The groove is open to the lower end side of the body 17 and is substantially a T-shaped groove. FIG. 8 shows a state in which the supported portion 14 is fitted in the suspension support portion 18, but does not show the mounting order.

  The supported portion 14 is integrally formed with protruding ridges 23 projecting sideways on the left and right sides intersecting the sliding direction with respect to the suspension support portion 18, and can be slid in a state in which the ridge 23 is fitted in the concave groove 22. It is. In the illustrated embodiment, the rotation support portion 20 for rotating the stopper arm 13 is formed to slidably support only the arc portion on the side close to the suspension support portion 18 on the outer peripheral surface of the bulging portion 16. (See FIG. 5). Therefore, when the stopper arm 13 is inserted from the lower end direction of the fitting hole 5 of the elevating body 3 with the supported portion 14 at the upper end facing upward, the upper half of the outer peripheral surface of the bulging portion 16 contacts the rotation support portion 20. Can't go any further upwards. In this state, the spring body 19 in the stopper arm 13 elastically presses the inner diameter portion of the elevating body 3, and the distal end portion of the engaging claw portion 15 projects outward from a through hole 24 formed in a predetermined position of the elevating body 3. As described above, the distal end portion of the engagement claw portion 15 can be engaged with any one engagement recess 11 in the spacer member 6.

  A mounting hole 26 into which at least the suspension support body 17 can be inserted laterally from the front side (in a direction orthogonal to the lifting / lowering direction of the lifting / lowering body 3) is formed at the upper end of the lifting / lowering body 3 (see FIG. 8). In the embodiment, it can be inserted into the mounting hole 26 in a state where a rotation support body 35 described later is mounted on the upper part of the suspension support body 17. In this case, as will be described later, a state in which the inclined claws 29a at the tips of the pair of sliding contact pieces 29 protruding from the inner surface of the cover portion 27 of the operation member 21 are confined to the back side from the stopper portion 32 in the rotation support 35. Then, the rotation support body 35 and the suspension support body 17 are integrally inserted into the mounting hole 26. Accordingly, when the suspension support body 17 is inserted together with the rotation holding means 30 with the supported portion 14 facing the mounting hole 26, the supported portion 14 is fitted from the rear end side of the suspension support portion 18, and the stopper arm 13. Is suspended so as not to fall (see FIGS. 4, 5 and 9).

  As shown in FIGS. 4, 5, and 10 to 12, the operation member 21 for operating the supported portion 14 of the stopper arm 13 is the upper end portion of the elevating body 3, and the mounting hole 26 extends from the front. The cover 27 has an arc-shaped cover portion 27 that closes, and a pressing portion 28 for pressing the supported portion 14 from the front direction protrudes backward on the inner surface of the cover portion 27. Further, on both the left and right sides of the pressing portion 28, sliding contact pieces 29 made of a pair of elastic bodies that slide in contact with the guide grooves 31 in the front-rear direction formed on the left and right side surfaces of the suspension support body 17 extend backward. An inclined claw 29 a for preventing the operation member 21 from coming forward is provided at the front ends of the sliding contact pieces 29, and the operation member 21 is supported by the biasing force of the spring body 19 via the supported portion 14 of the stopper arm 13. When the head moves forward, the inclined claw 29a comes into contact with the stopper portion 32 at the rear end of the guide groove 31 so that it cannot be pulled forward any further.

[How to lift and lower the lifting body]
With the above configuration, when the cover portion 27 of the operation member 21 is pushed, the pressing portion 28 pushes the supported portion 14 backward in the suspension support portion 18 of the suspension support body 17. The stopper arm 13 rotates about the bulging portion 16 against the urging force of the spring body 19. Accordingly, the supported portion 14 slides backward in the suspension support portion 18, and the engagement claw portion 15 at the lower end of the stopper arm 13 comes out of the engagement recess 11 of the spacer member 6 fixed to the inner diameter portion of the elbow strut 2. The engagement is released, and the elevating body 3 can be raised and lowered. When the user holds the elbow rest member 4 and raises and lowers the lifting body 3 by an appropriate height while holding the cover portion 27, and then releases the hand from the cover portion 27, the engaging claw is applied by the urging force of the spring body 19. The portion 15 projects from the inner diameter side of the lifting body 3 through the through hole 24, and the engaging claw portion 15 can be engaged with the engaging recess 11 of the spacer member 6 to hold the height position of the lifting body 3. .

  When the operation member 21 is disposed on the left and right outer sides of the lifting body 3, the engaging claw portion 15 of the stopper arm 13 is engaged with the spacer member 6 by pushing the cover portion 27 toward the left and right inner sides of the chair. What is necessary is just to comprise so that it may come out from the joint recessed part 11, and what is necessary is just to change the direction of the suspension support part 18, the stopper arm 13, and the spacer 6 of the suspension support body 17. FIG.

In the embodiment, the rotation holding means 30 for rotating the lateral direction of the elbow rest member 4 that is long in the front-rear direction (the direction perpendicular to the elevating direction of the elevating body 3) and holding the state thereafter is as follows. A rotation support 35 fixed on the suspension support 17, a receiving seat 36 provided on the upper surface side for rotating and supporting the elbow rest base member 4 a with less resistance, and an upper portion of the rotation support 35 An elastic body 37 such as rubber that fits in the recess of the inner surface of the cylindrical portion and the inner peripheral surface of the cylindrical portion serving as the center of rotation of the elbow pad base member 4a and the elastic body 37 are urged radially outward. And a locking pin 38. When the elbow rest member 4 is rotated in the lateral direction, the locking pin 38 is selectively fitted into one of the concave portions 39 provided in the circumferential direction on the inner circumferential surface of the cylindrical portion. It is the structure which can hold | maintain in the state which changed the direction of the longitudinal direction of the contact member 4. FIG. The rotation support 35 is provided with a protruding rib in the mounting hole 26 so that it can be inserted into the mounting hole 26 in the elevating body 3 from the front and cannot be removed upward. In the present invention, it goes without saying that the elbow rest member 4 may have a structure that does not rotate.
Note that the front surface of the rotation support 35, the locking pin 38, and the elastic body 37 are formed by the inner cover portion 33 that extends upward from the front surface of the suspension support body 17 and has substantially the same curved surface as the inner surface of the cover portion 27 of the operation member 21. Since the front side is covered, even if there is a gap between the inner surface of the cover part 27 of the operation member 21 and the inner cover part 33, only the front surface of the suspension support body 17 can be seen, and the internal structure of the rotation holding means 30 can be visually confirmed. Therefore, the aesthetic appearance is excellent.

  A means for attaching the elbow rest member 4 to the lifting body 3 so as not to be detached is a bolt 41 that is screwed to the upper ends of the washer 40 and the rotation support body 35 (see FIGS. 5 and 6).

  As an urging means for pressing the engaging claw portion 15 of the stopper arm 13 against the engaging concave portion 11 of the spacer member 6, a suspension support portion is provided between the rear surface of the supported portion 14 and the inner surface of the mounting hole 26 of the lifting body 3. A configuration may be adopted in which a compression spring (not shown) is disposed in the side 18 so as not to fall off, so that the supported portion 14 is pushed toward the pressing portion 28 of the operating member 21.

  As another embodiment of the present invention, although not shown, a push button portion may be integrally formed as an operation member on the upper end of the stopper arm 13. Moreover, when inserting the stopper arm 13 from the upper end of the fitting hole 5 of the raising / lowering body 3, the rotation support part 20 is formed so that only the outer peripheral surface of the lower side of the bulging part 16 may be rotatably supported. Also in this case, after the stopper arm 13 is inserted into the elevating body 3, the spacer member 6 is externally fitted to the elevating body 3, and then these are integrally inserted from the upper end of the fitting hole 5 of the support column 2b.

  Further, the elevating body may be provided with a downward open skirt (case) for fitting the elbow strut 2 on the outer periphery of the inner cylinder. In that case, instead of the stopper arm arranged on the inner diameter portion of the inner cylinder, A stopper arm is rotatably arranged between the inner diameter and the outer diameter of the inner cylinder and outside the outer diameter of the elbow support 2, and a spacer provided with an engagement recess on the outer peripheral surface of the elbow support 2 is fixed. You may do it. In these cases, it goes without saying that a suspension support body having a suspension support section and an operation member are provided.

DESCRIPTION OF SYMBOLS 1 Armrest device 2 Elbow post 3 Lifting body 4 Elbow rest member 5 Fitting hole 6 Spacer member 11 Engagement recessed part 13 Stopper arm 14 Supported part 15 Engagement nail | claw part 16 Expansion part 17 Suspension support body 18 Suspension support part 19 Energizing Spring body 20 rotation support part as means

Claims (4)

An elevating body having an elbow rest at the upper end is mounted so as to be movable up and down with respect to the elbow strut, and by operating a stopper arm disposed on the elevating body, the elevating body is placed at a plurality of positions with respect to the elbow strut. An armrest device for holding in stages,
A supported portion is formed at the upper end portion of the stopper arm, and a bulging portion serving as a rotation center is formed at the upper and lower middle portions of the stopper arm,
The lifting body below the elbow rest member is provided with a suspension support section for suspending the supported portion so as to be slidable only in the lateral direction crossing the lifting direction of the lifting body,
The elevating body is formed with a rotation support portion for rotating the stopper arm around the bulging portion,
When the stopper arm rotates when the supported portion is pressed in the lateral direction by the operation member, the engaging portion between the lower portion of the stopper arm and the elbow post is released, and the lifting body can be raised and lowered. Armrest device. The stopper arm is disposed on an inner diameter portion of the lifting body,
The engaging portion includes an engaging claw portion formed at a lower portion of the stopper arm and a plurality of engaging concave portions provided on the elbow strut and formed at appropriate intervals along the ascending / descending direction of the elevating body. Provided,
The armrest device according to claim 1, wherein the operation member includes a pressing portion that presses the supported portion of the stopper arm. The outer peripheral surface of the bulging portion is formed in an arc shape,
The rotation support portion for rotating the stopper arm is formed to slidably support only one of the outer peripheral surface of the bulging portion, which is close to the suspension support portion or only the far side. The armrest device according to claim 1 or 2.   The armrest device according to any one of claims 1 to 3, wherein the stopper arm or the elevating body is provided with a biasing means that biases the engagement claw portion into a posture to engage with the engagement recess. .

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