JPH0334109Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a device for tilting the top plate of a drafting desk, a study desk, or the like.

<Prior Art> Generally, a drafting desk or the like is equipped with a top plate that is inclined with respect to the desk body in order to improve workability.

Conventionally, this top plate tilting device utilizes the meshing of a rack and a pinion.The shaft of the pinion is rotated by a handle, etc., and the rotational movement of the pinion is converted into linear motion by the rack attached to the top plate. The top plate was now tilted.

<Problems to be solved by the invention> Therefore, in order to tilt the top plate, it is necessary to operate the handle each time, and the handle also needs to be rotated many times, making the operation cumbersome. Further, there were problems in that it was troublesome to remove and attach the handle, and it was also troublesome to store it.

<Means for Solving the Problems> The present invention has been made to solve these conventional problems, and the present invention is designed to tilt the top plate at a predetermined angle by engaging the support arm and the support bracket. At the same time, the engagement can be released by operating a cable, and the top plate can be automatically tilted by the torque of a spring.

That is, the present invention includes a top plate attached to a desk body such that the other end can move upwardly around one end, a support arm whose upper end is pivoted to the other end of the top plate, and a support arm that is a support bracket formed with a plurality of engaging grooves and attached to the desk body; a spring that biases the support arm upward by a torque that moves the top plate upward; and a groove in the support bracket that is operated by a cable. and a guide plate that moves in a direction to release the engagement with the support arm.

<Function> In the present invention, the tilted state of the top plate is maintained by the engagement between the support arm on the top plate side and the groove in the support bracket on the desk body side. The spring applies a torque that moves the top plate upward when this engagement is released. Further, the guide plate moves so as to release the engagement between the support arm and the support bracket, and the support arm of the top plate, which is moved upward by the torque of the spring, engages with the next groove of the support bracket. It is designed to guide you.

<Embodiment> FIG. 1 is a side view of an embodiment of the present invention, and FIGS. 2 and 3 are its front and rear views.

In these figures, the top plate 14 is attached to the upper surface of the desk body 13 so that the right end moves upward relative to the left end. That is, as shown in FIG. 2, a plurality of bearing brackets 1, 1, . . . and 2, 2, .
These bearing brackets 1, 1... and 2, 2...
A support shaft 3 is inserted through the ..., and the right end of the top plate moves upward around the shaft 3. In this embodiment, the top plate 14 is slidable in the axial direction of the support shaft 3, so that the top plate 14 can also be adjusted in the width direction by sliding left and right.

On the other hand, a support arm 5 and a support bracket 7 are attached to the right end portions of the top plate 14 and desk body 13, respectively. The upper end of the support arm 5 is rotatably supported by a bearing attached to the lower surface of the right end of the top plate, and the lower end is bent into a U-shape as shown in FIG. support bracket 7
It is adapted to engage the groove of the Further, the support bracket 7 is attached to the upper part of the right side of the desk body 13, and as shown in FIG.
and 7c are formed in stages. Among these, when the support arm 5 engages with the lowest groove 7a, the top plate 14 is maintained horizontally, and when it engages with the upper grooves 7b and 7c, the angle gradually increases. It is. The groove 7c at the top is wider than the other grooves so as to protrude outward, thereby ensuring safety so that the support arm 5 does not come off the support bracket when the top plate 14 is moved upward. is improving. As shown in FIG. 5, an annular slider 6 is slidably inserted into the lower end of the support arm 5, and a belt-shaped sheet 11 is wrapped around the slider 6. Therefore, it is stretched horizontally between the top plate 14 and the desk body 13, and its terminal end is connected to one hook 1 of the coil spring 12 as shown in FIG.
It is attached to 2a. The other hook 12b of this spring 12 is hooked on the support shaft 3,
As a result, the top plate 14 is biased via the belt-shaped sheet 11 and the support arm 5 so that the right end thereof moves upward. In this case, the spring 12 is selected to have sufficient torque to tilt the top plate 14.

9 is a guide plate attached to the open end surface of the support bracket 7, and the pull cable 1
The support arm 5 is tilted by the cable operation of 0.
This is to release the engagement with the support bracket 7. As shown in FIG. 4, the inclination of the guide plate 9 is determined by
This is done by pulling the ball-shaped tip 10a to press the lower end of the guide plate 9, which causes the lower end of the guide plate 9 to press the support arm 5 in the same direction and support the support bracket 7.
The guide plate 9, which is disengaged from the groove and is in an inclined state, serves as a guide when the support arm 5 moves to the next groove.

Next, the operation of tilting the top plate 14 according to the present embodiment configured as described above will be explained.

When the support arm 5 is engaged with the lowermost groove 7a of the support bracket 7 as shown in FIG. 4, the top plate 14 is maintained horizontally. When the lever 10b of the pull cable 10 is pulled toward the front, the cable tip 10a presses the guide plate 9 and pulls up the plate 9, and the support arm 5 is removed from the groove 7a (see FIG. 6). In this state, since the torque P of the spring 12 is acting on the support arm 5, the right end of the top plate 14 is pushed up, and the support arm slides on the upper surface of the guide plate 9 and rises to the next groove 7b. (See Figure 7). Therefore, release the lever 10b of the pull cable 10,
When the guide plate 9 is returned to the vertical position, the support arm 5 engages with the groove 7b, and the top plate 14 is maintained in an inclined state (see FIG. 8). Furthermore, if the pull cable 10 is operated in the same way, the
As shown in the figure, the support arm engages with the uppermost groove 7c, and the inclination angle of the top plate 14 increases.

Next, to return the top board from the tilted state to the horizontal state, pull the lever 10b of the pull cable 10,
The guide plate 9 is tilted to release the engagement between the groove 7c and the support arm 5, and in this state, the force E shown in FIG. 1 is applied to the top plate, and the top plate 14 is moved against the spring torque P. This is done by pressing down (see Figure 12). As a result, the support arm 5 slides down on the guide plate 9 and the top plate 14 becomes horizontal as shown in FIGS. The horizontal state is maintained.

In the above embodiments, the top plate 14 can slide left and right, but in the present invention, it is not necessarily necessary to slide, and in this case, the slider 6 can be removed. or,
The number of grooves may be increased or decreased to change the inclination angle as appropriate.

<Effects of the Invention> According to the invention described above, the inclination angle of the top plate can be adjusted only by operating the cable, which facilitates the operation and improves the operability.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the present invention, Figs. 2 and 3 are its front and rear views, Figs. 4 and 5 are side and rear views of the main parts, and Fig. 6 Figures 1 to 14 are side views of main parts showing the operation. 5...Support arm, 7...Support bracket, 7
a, 7b, 7c...groove, 9...guide plate,
10...cable, 12...spring, 13...desk body, 14...top plate.

Claims (1)

[Scope of utility model registration request] A top plate attached to the desk body so that the other end can move upwardly around one end, a support arm whose upper end is pivoted to the other end of the top plate, and a plurality of grooves that the support arm engages with. A support bracket is formed and attached to the desk body, a spring urges the support arm upward by a torque that moves the top plate upward, and a cable is operated to engage the support arm between the groove of the support bracket and the support arm. A top plate tilting device comprising a guide plate that moves in a direction to release the top plate.