JP4579089B2 - desk - Google Patents

Description

  The present invention relates to a desk capable of adjusting an inclination angle of a top board.

As something similar to a conventional desk of this type, for example, a top plate is pivotally attached to the upper ends of a pair of left and right leg posts so that it can be rotated between a horizontal use position and a vertical retraction position, Each end of the damper device (gas spring) facing in the front-rear direction is connected to the middle part of the connecting member that connects the left and right leg struts and the front frame fixed to the lower surface of the top board, and the top board rotates There is one in which a braking force is applied to the base plate so as to mitigate the impact when the top plate reaches each end position (see, for example, Patent Document 1).
JP 2003-275032 A

  However, in the desk described in the above-mentioned patent document 1, the connecting end to the top plate side of the damper device is pivotally attached to the front frame provided on the lower surface of the top plate, so that the top plate is used The entire damper device and the front frame protrude downward from the lower surface of the top plate to narrow the lower limb space for the seat occupant of the chair placed in front of the table. There is a risk of discomfort when hitting the device.

In addition, the desk is not intended to stop at an intermediate inclined position by merely rotating between the use position and the retracted position, and the damper device is merely a brake and shock absorber. However, when this damper device is replaced with a gas spring with a hydraulic lock so that the top plate can be stopped at any tilted position, the gas spring is However, it is mechanically desirable to maintain a tilt angle as large as possible with respect to the horizontal top plate.
However, if the gas spring makes an inclination angle as large as possible with respect to the horizontal top plate when the top plate is set to the horizontal position, the lower limb space is further narrowed.

  In the present invention, in view of the above-described problems of the prior art, the gas spring can maintain a sufficient inclination angle with respect to the horizontal top plate even when the top plate is set to the horizontal position. It is possible to provide a desk that can stably support the top plate, secure a large leg space below the top plate, and is easy to use and easy to use. .

According to the present invention, the above problem is solved as follows.
(1) An intermediate portion of the top plate is pivotally attached to the front end portion of the top plate support body extending forward from the leg body with a shaft directed in the left-right direction, and is located behind the shaft on the lower surface of the top plate. A concave portion facing in the front-rear direction is provided in the portion, and a front-rear direction in which the front end is pivotally attached to the top plate support with a shaft facing in the left-right direction in the concave portion, and the top plate is rotated in the vertical direction by expanding and contracting. The rear end portion of the gas spring with a hydraulic lock for supporting the facing top plate is fitted, and this rear end portion is pivotally attached to the top plate with an axis facing in the left-right direction in the recess.

(2) In the above item (1), the hydraulic spring unlocking operation means is provided on the lower surface of the front portion of the top plate.

(3) In the above item (1) or (2), the top plate support has a pair of upper and lower link arms having a rear end pivotally attached to the leg and a front end pivotally attached to the lifting body. It has a pair of parallel link mechanisms and a connecting rod that connects the left and right lifting bodies, and by rotating the link arm in the vertical direction, the lifting body moves up and down. And the front end of the gas spring is pivotally attached to the connecting rod.

(4) In the above item (3), the top plate support is pivotally attached at one end to the leg and at the other end to the connecting rod so as to face the link arm in a side view. A gas spring with a hydraulic lock for lifting and lowering, provided on the lower surface of one side of the front portion of the top plate with hydraulic lock release operating means for the gas spring for lifting and lowering, and on the lower surface of the other side A hydraulic lock releasing operation means for the gas spring for supporting the top plate is provided.

(5) In the above item (2), or the subordinate item (3) or (4), the hydraulic spring unlocking operation means is pulled sideways along the lower surface of the top plate, It is assumed that an operation lever that can release the hydraulic lock is provided.

(6) In any one of the above items (1) to (5), a front part of the top plate support body is pivotally attached to the front end portion of the top plate with a shaft directed in the left-right direction. A portion rearward from the center of gravity and a rear end portion of the gas spring for supporting the top plate are pivotally attached with a shaft directed in the left-right direction.

(7) In any one of the above items (1) to (6), the front edge of the top plate is formed in a concave arc shape in plan view that is recessed backward, and both side edges of the top plate are viewed in plan view. , The center of gravity of the top plate is positioned behind the center point of the front-rear dimension of the top plate.

  According to the first aspect of the present invention, the concave portion is provided on the lower surface of the top plate, and the rear end portion of the gas spring is fitted therein and pivotally attached to the top plate. In addition, the inclination angle of the gas spring with respect to the top plate can be made sufficiently large without increasing the vertical dimension from the top surface of the top plate to the lower end of the gas spring, so that the top plate can be supported stably. And a large leg space can be secured below the top board.

  According to the second aspect of the present invention, since the hydraulic spring unlocking operation means of the gas spring is provided on the lower surface of the front portion of the top plate, the front end portion of the top plate is moved up and down while operating the operating means with one hand. The tilt angle of the top plate can be changed and the operability is good.

  According to the invention of claim 3, not only can the top plate be changed in inclination angle, but the top plate can be moved up and down, and the link arm or the like which is the top plate support is concentrated on both side portions below the top plate. Since there is only a connecting rod (also a gas spring in some cases) below the central part of the top plate, ensure a large leg space for the user below the top plate. Can do.

  According to the invention described in claim 4, the top plate can be raised and lowered as well as changing the inclination angle, and both sides of the front part of the top plate are grasped from above and below with one hand for raising and lowering. The gas spring hydraulic lock release operating means is operated, and the top plate support gas spring hydraulic lock release operating means is operated with the other hand, so that the top plate is lifted and the tilt angle is adjusted. At the same time, it can be done easily with natural movement.

  According to the invention described in claim 5, since the top plate can be grasped from above and below while pulling the operation lever with the same hand, the operability is good.

  According to the invention of claim 6, the portion ahead of the center of gravity of the top plate is pivotally attached to the front end portion of the top plate support, and the portion behind the center of gravity of the top plate is supported by the gas spring. As a result, the top plate and the one placed thereon can be stably supported.

  According to the seventh aspect of the present invention, since the center of gravity of the top plate is located behind the center point of the front-rear dimension of the top plate, even when the top plate is extended largely forward from the leg, In addition to being able to support, when the desk is used, the top plate develops in a generally fan shape centering on the user located in the recess at the front end of the desk. This is suitable when a device is placed and multiple operations are performed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an embodiment of the present invention, and FIG. 2 is a perspective view of a support frame from which a top plate and an auxiliary top plate are similarly removed.

  The support frame (1) is fixed to a pair of left and right legs (2) and (2) having an inverted T shape when viewed from the side, and the upper ends of the legs (2). A supporting rod (3) (3) facing in the front-rear direction, and a laterally connecting rod (4) (5) before and after connecting the front ends and rear ends of the left and right support rods (3) (3); A top plate support (6) attached to the front part of the left and right support rods (3) and (3) so as to face the front (hereinafter, described diagonally lower left in FIGS. 1 and 2). I have.

  The leg body (2) is composed of a base leg (2a) facing in the front-rear direction and a pedestal (2b) having an approximately elliptical cross section in plan view, which stands slightly rearward of the center. Height adjusters (2c) are provided on the lower surfaces of the front and rear end portions of the base leg (2a).

  As shown in FIG. 5, a hook-like wiring duct (7) facing in the left-right direction with the upper surface opened is provided on the front surface of the rear lateral connecting rod (5), and a wiring duct ( A cover member (8) is detachably installed between the inner surfaces of the left and right support rods (3) and (3) so as to cover the front part of the upper surface opening of 7).

  As shown in FIGS. 2 to 4, the top plate support (6) is mounted on the front end of a pair of left and right support rods (3) and (3) so as to be pivotable in the vertical direction. A pair of parallel link mechanisms (9) and (9) facing left and right are provided.

  The left and right parallel link mechanisms (9) and (9) are pivotally supported by bearing portions (10) and (10) integrally formed at the front ends of the left and right support rods (3) and (3), and A first link arm (12) facing forward, with a rear end fixedly fitted to each end of one base shaft (11) (see FIG. 5) that faces in the left-right direction that passes through the front lateral coupling rod (4). ) And inwardly, the rear end is pivotally supported by an upward projection (13) provided at the upper front end of the support rod (3) with a pivot (14) facing left and right. The second link arm (15), which is positioned higher than the first link arm (12), and the first and second link arms (12) (15) are parallel to each other at the front end. A lifting / lowering body (18) having a substantially T-shape in a side view connected with shafts (16) and (17) facing in the left-right direction is provided.

The upper rear portions of the left and right elevating bodies (18) and (18) are connected to each other with a connecting rod (19) facing in the left-right direction.
The front ends of the brackets (21) and (21) facing the front and rear direction fixed to the both sides of the lower surface of the top plate (20) are located on the front upper ends of the left and right lifting bodies (18) and (18). In front of the center of gravity (G), it is pivotally attached with an axis (22) facing in the left-right direction.

A hydraulic lock for raising and lowering that urges the top plate (20) in the upward direction via the connecting rod (19) at the central portion of the connecting rod (19) and the central portion of the horizontal connecting rod (4). Each end of the attached gas spring (23) is connected so that the gas spring (23) faces the link arms (12) and (15) in a side view.
Further, on the side of the gas spring (23), the rear connection plate (4) and the rear portion of the top plate (20) behind the center of gravity (G) are urged upwards by the rear portion of the top plate (20). The front and rear end portions of the gas spring (24) with a hydraulic lock for supporting the top plate are pivotally attached with shafts (28a) (28b) facing in the left-right direction.

As shown in FIG. 1, the front edge of the top plate (20) is formed in a concave arc shape in plan view that is recessed backward, and the rear edge of the top plate (20) bulges backward. It is formed in a convex arc shape in plan view, and both side edges of the top plate are expanded in a C shape toward the rear in plan view, and the top plate (20) has a substantially fan shape in plan view.
More precisely, the both side edges of the top plate (20) form an arc surface that gradually curves inward as it goes forward, and the front end of the top plate (20) has a slightly soft elastomer resin. A hand placement part (20a) made of a material such as is integrally formed.
The outer peripheral portion of the hand placing portion (20a) has a lower surface as an inclined surface facing obliquely outward and upward.

  With the top plate (20) having such a shape, the center of gravity (G) of the top plate is located behind the center point (C) of the front and rear dimensions of the top plate, and thereby the top plate (20) is Even in a state where the leg (2) is largely extended forward, it can be stably supported. In addition, when the desk is used, the top plate (20) develops in a substantially fan shape centering on the user located in the recess at the front end thereof, so that it is easy to use, and in particular, a large number of OA on the top plate (20). This is suitable when a device is placed and multiple operations are performed.

As shown in FIGS. 5 and 6, the lower surface of the top plate (20) has a recess (25) that is long in the front-rear direction in which the rear end of the gas spring (24) is fitted, and the front end of the gas spring (24). A concave portion (26) into which an upper portion of an operation lever (33) described later in the portion is fitted is provided.
A rear end portion of the gas spring (24) is pivotally attached to a bracket (27) provided at the rear end portion in the recess (25) with a shaft (28b) facing in the left-right direction.

The gas springs (23) and (24) may be provided with a known hydraulic lock, and as shown in FIG. 7, a projecting shaft-like valve (29) provided at the front end thereof is connected to a hydraulic lock release operating means described later. (30) By being actuated by the operating lever (33) connected to the wire (32) by the wire (32), it is biased in the extending direction by the built-in gas pressure or the biasing force of the spring (not shown). The valve (29) is released, and the valve (29) protrudes and returns to the locked state. It has become.
The wire (32) passes through the outer tube (34) and is guided to the hydraulic lock release operating devices (30) and (31).

  As shown in FIG. 7, the hydraulic unlocking operation device (30) for operating the gas spring (23) for raising and lowering is provided on the lower surface of the right side portion of the front portion of the top plate (20) and the gas spring for supporting the top plate. The hydraulic unlocking operation device (31) for operating (24) is provided on the lower surface of the left side portion of the front portion of the top plate (20).

  Both hydraulic unlocking operation devices (30), (31) have the same symmetrical structure, and each faces the lower surface of the front corner of the top plate (20) in substantially the same direction as the side edge. And a holding frame (36) that is fitted in a recess (35) that is formed obliquely in the front-rear direction and has a peripheral flange (36a) screwed to the lower surface of the top plate (20). An operating lever (38) is provided in the frame (36) so as to be pivotally attached with a shaft (37) facing upward and downward and accommodated so as to be rotatable by a required angle.

The terminal on the hydraulic unlocking operation device (30) (31) side in the outer tube (34) is attached to the middle part in the front-rear direction on the inner side surface of the holding frame (36), and the holding frame (36) from the terminal The end of the wire (32) extending toward the end is supported by an intermediate portion of the operation lever (38) in the front-rear direction.
On the lower surface of the operation lever (38) on the free end side away from the shaft (37), a handle portion (38a) that is a rectangular recess is provided, and a finger is put on the handle portion (38a), By rotating the operation lever (38) outward along the lower surface of the top plate (20), the wire (32) can be pulled and the gas springs (23), (24) can be unlocked.

As shown in FIGS. 3 to 5, behind the top plate (20), a horizontally long auxiliary top plate (39) has a pair of leg rods (40) and (40) provided on the lower surfaces of both left and right sides. The left and right support rods (3) and (3) are inserted into the legs (2) and (2) so as to be adjustable in height so that they are supported.
The front edge of the auxiliary top plate (39) has an arc shape recessed backward in plan view so as to complement the rear edge of the top plate (20), and the rear edge is the top plate (20). Similar to the rear edge, it has a convex arc shape in plan view that bulges backward.

  In this embodiment, as described above, a portion in front of the center of gravity (G) of the top plate (20) is pivotally attached to the front end portion of the top plate support (6), and the center of gravity of the top plate (20) is provided. Since the portion behind (G) is supported by the gas spring (24), the top plate (20) and the one placed thereon can be stably supported.

  Further, by combining the above configuration with the hydraulic lock release operation device (31) of the gas spring (24) provided on the lower surface of the front portion of the top plate (20), the front portion of the top plate (20) With the hand holding the gas spring, operate the hydraulic lock release operation device (31) of the gas spring (24), and move the front part of the top plate (20) up and down to change the tilt angle of the top plate (20). Can be done easily with natural movement.

  Furthermore, by combining the gas spring (23) and its hydraulic unlocking operation device (30) with the above configuration, the both sides of the front part of the top plate (20) are grasped from above and below with both hands, Operate the hydraulic unlocking operation device (30) of the gas spring (23) for raising and lowering by hand, and operate the hydraulic unlocking operation device (31) of the gas spring (24) for supporting the top plate with the other hand. By operating it, it is possible to easily raise and lower the top plate (20) and adjust the inclination angle at the same time and with natural movements.

  The support mechanism of the top plate (20) is arranged in a concentrated manner on both sides below the top plate (20), and below the central portion of the top plate (20) is a connecting rod (19) and a gas spring. (23) Since only (24) exists, a large space for accommodating the user's feet can be secured below the top plate (20).

  The hydraulic spring unlocking operation device (30) (31) of the gas spring (23) (24) is pulled to the side along the lower surface of the top plate (20), so that the gas spring (23) (24) Since it is equipped with an operation lever (33) that can be released from the locked state, the top plate (20) can be grasped from above and below while pulling the operation lever (38) with the same hand. Is good.

The present invention is not limited to the above embodiment.
In the above embodiment, the top plate support (6) that supports the top plate (26) is provided with a pair of left and right parallel link mechanisms (9) and (9). ) (2) may be a simple arm extending forward from the upper part.

  Also, the lifting and lowering gas spring (23) for urging the parallel link mechanism (9) upward and stopping its rotation is omitted, and the top plate (20) is stopped at the lower limit position and the upper limit position. Appropriate stopper means may be provided.

It is an external appearance perspective view of one Embodiment of this invention. Similarly, it is the perspective view of the support frame which removed the top plate and the auxiliary top plate. Similarly, it is a side view when the top plate and the auxiliary top plate are set to the lower limit position. Similarly, it is a side view when a top plate and an auxiliary top plate are raised. Similarly, it is a vertical side view of the main part when the top plate is horizontal. Similarly, it is a vertical side view of the main part when the top plate is in a downwardly inclined state. Similarly, it is a top view of the principal part which shows a top plate with an imaginary line.

Explanation of symbols

(1) Support frame
(2) Leg
(2a) Base leg
(2b) pedestal
(2c) Adjuster
(3) Support rod
(4) (5) Horizontally connected rod
(6) Top plate support
(7) Wiring duct
(8) Cover member
(9) Parallel link mechanism
(10) Bearing part
(11) Basic axis
(12) First link arm
(13) Upward protrusion
(14) Axis
(15) Second link arm
(16) (17) axis
(18) Lifting body
(19) Linkage
(20) Top plate
(20a) Hand rest
(21) Bracket
(22) Axis
(23) (24) Gas spring
(25) (26) Recess
(27) Bracket
(28a) (28b) axis
(29) Valve
(30) (31) Hydraulic unlocking operation device
(32) Wire
(33) Actuating lever
(34) Outer tube
(35) Recess
(36) Holding frame
(36a) Buttocks
(37) axis
(38) Control lever
(38a) Handle
(39) Auxiliary top plate
(40) Leg
(C) Center point
(G) Center of gravity

Claims (7)

  At the front end of the top plate support that extends forward from the legs, the middle portion of the top plate is pivotally attached with a shaft that faces in the left-right direction, and on the rear side of the shaft on the lower surface of the top plate, A concave plate facing in the front-rear direction is provided, and a front plate facing in the front-rear direction is pivoted in the concave portion with the front end portion pivoted to the top plate support body with a shaft pointing in the left-right direction. A desk characterized in that a rear end portion of a gas spring with a hydraulic lock for support is fitted, and this rear end portion is pivotally attached to the top plate with a shaft facing in the left-right direction in the recess.   2. The desk according to claim 1, wherein a hydraulic spring unlocking operation means of the gas spring is provided on the lower surface of the front portion of the top plate.   A top plate support body connects a pair of left and right parallel lifting mechanisms having a pair of upper and lower link arms pivoted at the rear end to the leg and the front end to the lifting body, respectively. A connecting rod that rotates the link arm in the vertical direction so that the lifting body moves up and down, a top plate is pivotally attached to the lifting body, and a gas spring is connected to the connecting rod. The desk according to claim 1 or 2, wherein the front end is pivotally attached.   A gas spring with a hydraulic lock for raising and lowering, with one end pivotally attached to a leg and the other end pivotally connected to a connecting rod so that the top plate support faces the direction intersecting the link arm in a side view. A hydraulic lock release operating means for the gas spring for lifting and lowering is provided on the lower surface of one side portion in the front portion of the top plate, and the hydraulic pressure of the gas spring for supporting the top plate is provided on the lower surface of the other side portion. The desk according to claim 3, further comprising an unlocking operation means.   The hydraulic spring unlocking operation means of the gas spring is provided with an operating lever adapted to release the hydraulic lock of the gas spring by being pulled laterally along the lower surface of the top plate. The desk according to 3 or 4.   A front portion of the top plate support is pivotally attached to the front end of the top plate with a shaft that faces in the left-right direction, and the rear portion of the top plate and the rear end of the top plate support gas spring. The desk according to any one of claims 1 to 5, wherein the unit is pivotally attached with an axis directed in the left-right direction. By forming the front edge of the top plate in a concave arc shape in plan view that is recessed backward, and by expanding both side edges of the top plate in a C shape toward the rear in plan view, The desk according to any one of claims 1 to 6, wherein the center of gravity is positioned behind the center point of the front-rear dimension of the top plate.

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