JPS6282907A - Apparatus for adjusting tilting angle of top plate of desk - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an inclination angle adjusting device for a top plate of a study desk, a drafting desk, etc.

(Prior Art and Problems) Conventionally, this type of inclination angle adjustment device for a top plate, etc., generally includes an engagement member on the base side, which has a plurality of engagement recesses spaced apart from each other. A support rod that engages with the top plate is rotatably provided on the back surface of the top plate that is tiltably attached to the base, and the engagement recess and the support rod are sequentially engaged, and a guide member is provided to connect the top plate. The structure is such that the support rod does not engage with the engagement recess from the maximum angle side to the horizontal state. (For example, Utility Model Publication No. 49-42406) According to this configuration, when tilting the top plate in the upright direction,
The support rods automatically engage with the engagement recesses one after another, allowing the top plate to be tilted to the desired angle. However, when tilting the top plate in the direction of collapse, it is necessary to raise the top plate to the maximum angle. If you accidentally increase the tilt angle of the top while tilting the top in the upright direction to obtain the desired tilt angle of the top, you may be unable to do so after raising the top to the maximum angle. Furthermore, the desired top inclination angle could not be obtained unless the top was placed in a horizontal position and the top was raised again in stages.

(Objective of the present invention) The present invention is applicable to any state of inclination angle of the top plate.
It is an object of the present invention to provide an inclination angle adjusting device for a top plate, etc., which can quickly increase or decrease the inclination angle by a simple operation.

(Example ) Examples will be described below based on the drawings.

In Fig. 2, 1 is a base of a desk, etc., and 2 is a support rod 1 held in a support rod seat 11 fixed to the front end of the base 1.
2, a top plate whose back front end is fixed to a top plate seat 13.13 which is rotatable and slidably connected to the left and right; 3.3;
are angle adjustment plates fixed opposite to each other on the left and right sides of the back surface of the top plate 2,
5 is an engagement guide device provided between the angle adjustment plates 3 and 3 on the back surface of the top plate 2; 6 is an operating body for operating the engagement guide device 5;
7 is a top plate whose one end is supported by a slider 72.72 fitted to a rail 71 provided at the rear end of the base 1 so as to be movable from side to side, and whose other end is engaged with the angle adjustment plate 3.3. Support rod, 7
3.73 is a recess formed so that the lower end of the angle adjustment plate 3.3 does not come into contact with the base l when the top plate 2 is in a horizontal position.

The angle adjustment plate 3 has a plurality of engagement recesses 3 formed on the inner upper part.
1... and a guide piece 32 provided with a gap below which the top plate support rod 7 can slide. The side pieces 33 formed further outward form a U-shaped cross section, and are attached to the left and right ends of the back surface of the top plate 2 with screws or the like.

The engagement guide device 5 includes a rear support member 51 having a U-shaped cross section fixed to the rear end of the back surface of the top plate approximately in the middle of the angle adjustment plate 3.3.
, a front support member 52 fixed at a predetermined distance in front of the post-cough support member 51 , a front connecting member 55 whose upper end is supported and connected to the front support member 52 by a shaft 54 , and a rear support member A rear connecting member 56 whose upper end is supported and connected to the front end of the rear support member 51 by a shaft, and a bent portion 61 which is supported and connected to the rear end of the rear support member 51 by a shaft.
It consists of a letter-shaped operating body 6, the lower ends of the front and rear connecting members 55, 56, and the lower end of the connecting portion 62 of the operating body 6, and an engagement guide member 57 supported and connected by a shaft. The engagement guide member 57 is elastically biased forward and upward so that it always contacts the back surface of the top plate by the coiled spring 50 provided in the operating body 6.
The operating section 63 faces the back surface of the rear end of the top plate 2 and protrudes downward.

Then, when the operating portion 63 is rotated upward against the elasticity of the winding spring 50, the engagement guide member 57 moves from the front and rear connecting members 55.
56, while maintaining a state parallel to the top plate 2, it moves downward from the back surface of the top plate to a position having a predetermined gap.

This position is at least the same as or below the upper end of the guide piece 32 of the angle adjustment plate 3.

The top plate support rod 7 is connected to an engaging portion 73 that is formed by bending both ends of a round bar inward in a figure 15 shape and that engages with an engaging recess 31, and to a slider 72, 72. It is composed of supporting parts 74 and 74.

The holding portions 74.74 are formed with pin mounting holes 75.75 for preventing the slider 72 from being removed after being connected to the slider 72.

The slider 72 consists of a slider main body 76 made of synthetic resin and slightly smaller than the inside of the rail 71, and cylindrical support connecting parts 77 and 77 integrally formed on the left and right sides of the upper surface of the slider main body 76. The supporting connecting portions 77.77 are externally fitted onto the supporting portions 74.74 of the top plate support rod 7, and the pin attachment holes 75 facing between the supporting connecting portions 77, 77 are fitted with a retaining pin. is attached, and the slider 72 and the top support rod 7 are connected.

The present invention is constructed as described above, and the top plate 2 can be changed from a horizontal state (Fig. 3) to an inclined state! 3 (FIG. 4), when the rear end of the top plate 2 is first lifted, the engagement portion 73 of the top plate support rod 7 is always lifted upward by the engagement guide member 57. Therefore, the engagement protrusions 30 are sequentially engaged with the engagement recesses 31 along the end faces thereof, and the top plate 2 has a desired inclination angle.

The front end of the top plate 2 is attached to a slider 72 that is slidably fitted to the support rod 12 provided on the base 1, and the support portion 74 of the top plate support rod 7 is attached to the support rod 12 provided on the base I. It is attached to a slider 72 that is slidably fitted to a rail 72, and the engaging portion 73 of the top plate support rod 7 is prevented from moving to the left or right by the side pieces 33.33 of the angle adjustment plate 3.3. Therefore, the top plate 2 can be moved from side to side together with the top plate support rod 7 within a predetermined range depending on the installation location of the desk or the like or the content of the work.

Next, if you want to change the top plate 2 from the desired angle of inclination to a horizontal state or to obtain a one-step smaller inclination angle, use the operating body 6 to tilt the rear end of the top plate 2 as shown in FIG. When the engagement guide member 57 is supported and rotated upward using the tip, the engagement guide member 57 moves downward to a predetermined position while maintaining the state parallel to the top plate 2, as described above.

Then, if you slightly lift the rear end of the top plate 2, the top plate support t?
The engaging portion 73 of the rod 7 descends under its own weight, departs from the engaging recess 31, and comes into contact with the upper end surface of the guide piece 32.

In this state (Fig. 1), if you lower the rear end of the top plate 2 (
(phantom line in FIG. 1), the top plate 2 will eventually become horizontal.

In addition, when the rear end of the top plate 2 is lowered (on the way, when the top plate 2 reaches the desired inclination angle, when the operating body 6 is released, the retention guide member 57 is moved upward by the elasticity of the coiled spring 50. Along with this, the engaging part 73 of the top plate support rod 7 also moves upward, and the engaging part 73 engages with one of the engaging recesses 31..., and the top plate support rod 7 moves upward. The top plate 2 is supported at a desired inclination angle.

In the embodiment, the engagement guide member 57 is moved upward by the coiled spring 50 and the front and rear connecting members 55 and 56, but the rear connecting member 56 may be omitted, and the coiled spring 50 is connected to the operating body. 6 may be used, and other modifications may be made as appropriate without departing from the gist of the present invention.

In addition, a guide piece 32 is provided on the angle adjustment plate 3, and the top plate support rod 7
When the engaging portion 73 of
This is not necessarily necessary if it is supported by the engagement guide member 57.

Furthermore, although the top plate 2 is configured to be slidable from side to side, if the top plate 2 is simply tilted, the back of the front end of the top plate 2 can be connected to the front end of the base 1 with an ordinary hinge, and the top plate support rod can be used. 7 is rotatably attached to the rear end of the base 1, and the shape of the angle adjustment plate 3 can be further simplified.

<Effects> As described above, the present invention has a plurality of engagement recesses on the back surface of the top plate,
and an engagement guide member, so even when the top plate is tilted to its maximum angle, only the connecting part of the top plate support rod is exposed on the base, giving it a very good appearance.
Moreover, cleaning on the base is also easy.

Also, on the back of the top plate, always maintain the top plate support rod in a position that allows it to engage with the engagement recess, and if necessary, move the top support rod away from the engagement recess by a predetermined distance from the back of the top plate. Since it has an engagement guide member that allows it to come out of the way, no matter what angle the top plate is supported at, just by raising or lowering the rear end of the top plate, you can immediately move it to the desired top plate. You can get the tilt angle.

In addition, since the operating body for operating the engagement guide member faces the end of the top plate, it is possible to operate the operating body at the same time as raising and lowering the top plate, making it easy to adjust the angle of the top plate. .

[Brief explanation of drawings]

Fig. 1 is a vertical cross-section of the main part showing the case where the top plate inclination angle is reduced, Fig. 2 is an exploded perspective view of the present invention, Fig. 3 is a longitudinal cross-section of the main part when the top plate is in a horizontal state, FIG. 4 is a vertical cross-sectional view of the main part with the top board tilted, FIG. 5 is a perspective view of the slider, and FIG. 6 is a perspective view of the top support rod. 1-・・−−−−・−・・Base 2−・・
−Top plate 3−−−−−−・−−−−−−One angle adjustment plate
31...--Engagement recess 5--One engagement guide device 57--Engagement guide member 6--
・−・−・−Operation body 7・−・−Top plate support rod patent applicant −・・−・・−・・−・・Kurogane Kosakusho Co., Ltd. Figure 5 q 6 Decoy 7 da

Claims (1)

[Claims] A plurality of engagement recesses are provided on the back surface of the top plate whose front end is rotatable, and a top plate support rod that engages with the engagement recesses is rotatably attached to the rear end of the base. , Furthermore, at all times,
An engagement guide member that holds the top plate support rod in a position where it can be engaged with the engagement recess, and if necessary, is spaced a predetermined distance from the back surface of the top plate so that the top plate support rod can be deviated from the engagement recess. 1. An inclination angle adjusting device for a desk top plate, etc., characterized in that: is provided on the back side of the top plate, and an operating body for operating the engagement guide member is made to face an end of the top plate.