JP2545731Y2 - Mobile desk - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, when the top plate and the under tray on the back side are vertically swung when not in use, casters are automatically placed on the floor instead of the adjusters at the lower ends of the support legs. The present invention relates to a mobile desk adapted to be operated.

[0002]

2. Description of the Related Art A mobile desk of this type is disclosed in Japanese Utility Model Laid-Open Publication No. 63-194.
650. In the use state, the top plate and the under tray occupy the horizontal position, and the adjuster is set at a position lower than the caster and is installed on the floor. And
When the top plate or the under tray is rotated from the horizontal position to the vertical direction during the movement, a height switching mechanism is provided which interlocks and sets the casters on the floor surface. That is, when the top plate or the under tray is rotated, the cam at the base end lifts the connecting rod in the leg upward, and the link mechanism at the lower end reverses the caster frame supported by another parallel link. It is designed to rotate downward.

[0003]

That is, this height switching mechanism uses many links for the purpose of switching only, and is structurally complicated. Further, there is no disclosure of a structure in which the undertray is supported by the legs and rotated in a vertical state in conjunction with the top plate, and a height switching mechanism which does not require an additional complicated structure at that time.

Accordingly, the present invention provides a mobile desk of the type described at the beginning, which enables the top plate and the under tray to be simultaneously rotated in the vertical direction, and has a simple structure of an adjuster and a caster height switching mechanism. The purpose is to do.

[Means for Solving the Problems]

[0005] The present invention is provided on the back side of the top plate, on both sides of the left and right sides of the top plate hinged at the upper part of the legs so as to be rotatable in the vertical direction, and on the back side of the top plate. An under tray that can be rotated in the vertical direction and a leg seat that is provided below the leg and has casters and adjusters attached to the front and rear ends, respectively, for rotating the top plate and the under tray from a horizontal position to a substantially vertical position. In order to achieve the above-mentioned purpose, a caster mounting frame in which the casters are mounted on the leg seats in order to achieve the above-mentioned purpose, in a mobile desk in which the casters are mounted on the floor instead of the adjusters in conjunction with the movement. A slider rod that is housed vertically slidably and that is slidably guided vertically in the pipe-shaped legs is attached to the caster mounting frame, and this caster mounting frame is attached upward. A spring to be attached to the leg seat, the base end of the under tray is hinged to the upper part of the leg at a position lower than the hinge axis of the top plate, and the arm between the under tray and the top end of the top plate so as to form a parallel link. A hinge is provided at the upper and lower ends, and a cam that rotates integrally with the under tray around the hinge axis of the under tray is provided in the leg, and this cam presses the upper end of the slider rod downward when rotating vertically. The undertray is formed in a shape protruding from the hinge axis of the undertray toward the tip end of the undertray in a horizontal state of the undertray.

[0006]

When the top end of the top plate is rotated vertically downward, the under tray is rotated vertically downward while being folded together by the parallel link mechanism of the top plate, the under tray, the upper leg, and the arm. At this time, the cam protruding forward also rotates vertically downward in conjunction with it, and presses the upper end of the slider rod downward against the spring force. As a result, the caster mounting frame descends relatively to the leg seat, causing the casters to be installed on the floor surface and the adjusters to float.

[0007]

1 to 7 show a mobile desk according to an embodiment of the present invention. As shown in FIG.
And a pipe-shaped leg 3 on both sides hinged at a leg upper portion 3a so as to be rotatable from a horizontal position to a substantially vertical position with respect to the top plate, and at the same time, The rotating under tray 4 and the intermediate position in the front-rear direction are the lower leg 3b.
A leg seat 5 which is vertically elongated in the front-rear direction, and an adjuster 7 attached to the front and rear ends thereof and a caster 6 which can be moved up and down as described later.

As shown in FIG. 6, a bearing portion 10 is provided on the back surface of the left and right ends of the top plate 2 at front and rear intermediate positions, and is hinged to a rotating shaft 11 provided on the upper leg portion 3a. ,
The top plate 2 is rotatable from a horizontal position in a used state to a substantially vertical position in a non-used state. A U-shaped lock pin 12 is inserted into the bearing 10 and the leg upper part 3a on both sides, is connected to each other via a connecting rod 13, and is urged in a locking direction by a spring 14. . As a result, when the connecting rod 13 is moved to the right as viewed in the drawing against the spring force, the lock pin 12 is unlocked by the engagement and disengagement, and the top plate 2 is rotatable in the vertical direction.

As shown in FIG. 1, the under tray 4 is formed by connecting frames 20 on both sides with a plurality of horizontal bars 21 (see FIG. 2). The base end of the frame 20 is fixed to a rotary shaft 25 hinged to the upper leg portion 3a, while the tip end of the frame 20 is hinged to a bearing 22 provided on the back surface of the tip end of the top plate 2. It is hinged at the lower end. The rotating shaft 25 has a smaller diameter than the rotating shaft 11,
The arm 26 is offset toward the rear, and the length of the arm 26 is equivalent to the distance between the rotation shafts 11 and 25. By configuring the parallel link mechanism, the top plate 2 and the under tray 4 can be swung in a substantially vertical state as shown in FIG.

An adjuster 7 whose height is adjusted in a screw manner is attached to both front and rear ends of the leg seat 5, and a caster mounting frame 31 in which casters 6 are attached to both front and rear ends is provided. Are accommodated so as to be able to move up and down along the guide rod 34 of FIG. A spring 33 is mounted around the guide rod, and urges the caster mounting frame 31 upward with respect to the leg seat 5 (see FIG. 4). At an intermediate position in the front-rear direction of the caster mounting frame 31, a slider rod 32 that is slidably guided up and down in the leg 3 is provided upright.

A cam 35 (see FIG. 3) that rotates in the upper portion 3a of the pipe-shaped leg is fixed to the rotating shaft 25, and a cam follower 35a is attached to a tip end thereof. This cam shape has a tapered lever shape that projects slightly downward from the horizontal toward the tip end of the undertray 4 so as to push the slider rod 32 downward when the undertray 4 rotates from a horizontal position to a substantially vertical direction. Is formed. Thereby, at the horizontal position of the under tray 4, the lower surface 3 of the cam 35
5b occupies the horizontal direction and is substantially in contact with the distal end surface of the slider rod 32. When rotated in the vertical direction, the tip of the slider rod 32 is pushed downward by the cam follower 35a, so that the caster mounting frame 31 is lowered, and the caster 6 is lowered below the adjuster 7 from a position floating from the floor surface. Then, the adjuster 7 is floated instead. Then, as shown in FIG. 5, in a state where the top plate 2 and the under tray 4 are rotated substantially vertically, the cam follower 35a occupies a position closer to the rear than the rotation shaft 25 and presses against the slider rod 32, The vertical state is ensured by urging the under tray 4 in the swing direction when not in use, without receiving a driving force in the return direction.

In the horizontal state of the top plate 2 and the under tray 4 using the mobile table 1, the lower surface 35b of the cam 35 occupies a substantially horizontal state as shown in FIG.
5a is in contact with the slider rod 32 at a position slightly lower than the horizontal direction of the hinge shaft. At the time of non-use or movement, when the connecting rod 13 is moved in the unlock direction and the top plate 2 is pushed down in the vertical direction, the frame 20 rotates about the rotation shaft 25 in conjunction with the cam 35 in FIG. The cam follower 35a pivots clockwise in a substantially vertical direction, so that the cam follower 35a
2 is pushed down against the spring force. Then, the casters 6 of the caster mounting frame 31 move downward relative to the leg seats 5 to cause the adjusters 7 to float upside down from the floor (see FIG. 5).

[0013]

As described above, according to the present invention, by constructing the parallel link mechanism for supporting the top plate and the under tray on the legs, when not in use, they can be simultaneously linked and vertically overlap each other. it can. At this time, the cam that shares the hinge axis with the base end of the under tray presses the slider rod erected on the caster mounting frame in the leg, so that the height can be switched between the caster and the adjuster. Become.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view illustrating a main part of a mobile desk according to an embodiment of the present invention.

FIG. 2 is a front view of an upper part of the mobile desk.

3A and 3B show a cam portion on the upper leg of the mobile desk, wherein FIG. 3A is a front view and FIG. 3B is a side view.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a diagram corresponding to FIG. 1, showing a state when the mobile desk is not used.

FIG. 6 is a cross-sectional view of upper legs of the mobile desk.

FIG. 7 is a perspective view of the mobile desk.

[Explanation of symbols]

 2 Top plate 3 Leg 3a Leg upper 3b Leg lower 4 Under tray 5 Leg seat 6 Caster 7 Adjuster 11, 25 Rotary shaft 26 Arm 31 Caster mounting frame 32 Slider rod 35 Cam

Claims (1)

(57) [Scope of request for utility model registration] 1. A top plate, two leg portions hinged at upper leg portions so as to be rotatable in the vertical direction at left and right intermediate portions on both left and right sides of the top plate, and provided on the back side of the top plate, similarly in the vertical direction. An under tray that is rotatable to the lower side, and a leg seat portion that is provided below the leg and has casters and adjusters attached to the front and rear ends, respectively, and rotates the top plate and the under tray from a horizontal position to a substantially vertical position. The caster is mounted on the floor in place of the adjuster in conjunction with the caster, and the caster mounting frame on which the caster is mounted is vertically movably housed in the leg seat, A slider rod, which is slidably guided in a vertical direction in the section, is erected on a caster mounting frame, and a spring for urging the caster mounting frame upward is mounted on the leg seat portion; The base end of the tray is hinged to the upper part of the leg at a position lower than the hinge axis of the top plate, and the upper and lower ends of the arm are hinged between the distal end of the under tray and the top end of the top plate so as to form a parallel link. A cam that rotates integrally with the under tray around the hinge axis of the under tray is provided in the leg, and the cam presses the upper end of the slider rod downward when rotating vertically. A mobile desk, wherein the undertray is formed so as to protrude from a hinge axis of the undertray toward a tip end of the undertray in a horizontal state of the undertray.