JPS6222201Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an inclination angle adjustment device that is applied to adjust and hold the top plate of a table, chair, TV stand, etc. at any desired angle, and has an extremely simple configuration. The object of the present invention is to enable the top plate to be adjusted and held at a desired angle by the following operations.This will be explained in detail below based on the drawings showing embodiments.

As shown in Figures 1 to 4, the base 1
is formed in a cross-sectional shape by a bottom plate 2 and left and right side plates 3, 3 which are bent and erected integrally from the left and right ends of the bottom plate 2, respectively, and the side plates 3, 3 have a shape in the front and back directions. Long guide holes 4, 4 are provided oppositely to each other.

A top plate 5 is supported at a desired height on the base 1 by a fulcrum shaft 6 so as to be rotatable in the front and rear directions in a seesaw manner.

The top plate 5 is formed into a substantially 〓 shape in cross section by a top plate 7 and both side plates 8, 8 which are bent downwardly from both left and right ends of the top plate 7.
By pivoting approximately the central portion in the front and back direction of the base 2 to the left and right side plates 3, 3 of the base 2 by means of a fulcrum shaft 6,
The top plate 5 is pivotally supported relative to the substrate 1 so that both front and rear end portions thereof can move up and down.

Further, between the base 1 and the top plate 5, on the bottom plate 2, there is a slide plate 9 whose cross section is approximately 〓.
is interposed so that it can slide freely in the front and back direction,
The rear plate that is located at the rear end and hangs downward.
The slide plate 9 and the top plate 5 are connected by pivoting the end of the link 11 to the lower end of the section 10 and near the rear end of the top plate 8 using a support shaft 12 and a pin 13.

The slide plate 9 has side plates 15 and 16 bent downward from both left and right ends of the top plate 14.
A rotary operation shaft 17 is rotatably installed through shaft holes 16, 16 provided oppositely from the front ends of the left and right side plates 15, 15, and a rotary operation shaft 17 protrudes outward from the shaft holes 16, 16. Both ends of the shaft 17 are connected to the guide slots 4, 4 of the side plates 3, 3 in the base 1.
It is slidably penetrated only in the front-back direction via a vertical movement prevention means 18, and one end protruding outward is a rotary operation part 17a.

As the movement prevention means 18, it is preferable to use an annular guide 18a; in such a case, the guide 18a
is formed to have a diameter that matches the width of the guide slots 4, 4, and is externally fixed to the rotary operation shaft 17 and fitted into the guide slots 4, 4 to prevent vertical movement and only in the front-back direction. It can be slid.

In addition, the slide plate 9 is designed so that it can slide horizontally in the front and back direction without vertical play.
On both side plates 15, 15, a roller-shaped guide 19 is pivotally supported rearward by an appropriate distance from the rotary operation shaft 17, and is fitted into the guide elongated holes 4, 4, respectively.

This guide 19 may be rotatable or non-rotatable.

A transfer rolling element 20 is attached to the rotary operation shaft 17 so that the slide plate 9 can be transferred in the front-rear direction with respect to the base 1 by the rotation operation of the rotary operation shaft 17. ing.

As shown in FIGS. 1 to 4 and 6, the rolling elements 20 for transfer can be used either directly with the bottom plate 2 of the base 1 or indirectly by installing plate springs 21, rubber 22, etc. An engaging eccentric roller 23 may be used, or an eccentric roller 23a having a spline shaft shape with a non-slip surface 24 such as unevenness on the outer periphery may be used as shown in FIG. 5. As shown in FIG.
5 may be adopted. However, in such a case, the rack 26 is fixed to the bottom plate 2 of the base 1 in the front-rear direction so that the rack 26 meshes firmly with the pinion 25 as the transfer rolling element 20. In addition, by transmitting the rotational force of the rotational operation shaft 17 to the base 1 side, a reaction force is taken on the base 1 and the slide plate 9 is moved together with the rotational operation shaft 17.
The configuration is arbitrary as long as it can be slid in the front and rear directions.

When the leaf spring 21 is mounted on the bottom plate 2 of the base 1, one end 21a of the leaf spring 21 is attached as shown in the figure.
is fixed to the bottom plate 2 with a screw 28 or the like with a thin spacer 27 interposed between the bottom plates 2, and by making the other end 21b a movable end, the plate can be moved by the eccentric position of the eccentric roller 23. The spring 21 is pressed and elastically deforms, and the elastic force is applied to the eccentric roller 2.
It is formed so that feeding and stopping and holding are performed by acting to increase the frictional force with 3.

In addition, in Figures 2 to 4, 29 is the base 1.
It is a pillar fixed to the

In the above configuration, when the rotation operation shaft 17 is rotated to the right, that is, clockwise, using the rotation operation section 17a while the top plate 5 in FIG. 2 is held horizontally, the rotation of the shaft 17 is The transfer rolling element 20 rolls in pressure contact with the bottom plate 2 side of the base 1, thereby creating a reaction force on the base 1 side, and guides the guide plate 9 together with the rotary operation shaft 17 into the guide elongated hole 4. Being backwards,
In other words, it slides to the right in the figure.

As a result, the rear end of the slide plate 9 and the link 1
The pivot point with 1 moves to the right, but since the top plate 5 is rotatably supported on the base 1 by the fulcrum shaft 6, the lower end side of the link 11 moves to the right. , the link 11 is tilted forward, and the rear end of the top plate 5 is thereby pulled down.
The top plate 5 tilts rearward about the fulcrum shaft 6 as shown by the two-dot broken line in FIG.

In addition, in FIG. 2, when the rotary operation shaft 17 is rotated counterclockwise, the transfer rolling element 20 slides 9 against the base 1 due to the above-described pressing rolling movement.
slides forward, that is, to the left in the figure, so the link 11 stands up and rotates around the support shaft 12 as shown by the broken line, and pushes up the rear end of the top plate 5, so the top plate 5 moves as shown by the broken line in the figure. As shown, lean forward.

At this time, if the eccentric roller 23 in the illustrated example is set in advance so that the amount of eccentricity is the minimum and the top plate 5 is in a horizontal state, the eccentric roller 23 in the illustrated example will move clockwise or counterclockwise as described above. As the eccentric roller 23 rotates, the eccentric position of the eccentric roller 23 is displaced and becomes larger, so the frictional force between it and the bottom plate 2 of the base 1, the leaf spring 21, the rubber 22, etc. increases, and this increases the holding force. As a result, free rotation is prevented, and the top plate 5 is held at an arbitrary adjusted inclination angle, so that the top plate 5 does not naturally return to the horizontal position.

As explained above, according to the top plate inclination angle adjusting device according to the present invention, the top plate 5 is pivoted on the base 1 so that it can be rotated back and forth in a seesaw manner at a desired height. At the same time, a slide plate 9 on which a rotary operation shaft 17 is rotatably horizontally installed below the slide plate 9 is installed on the left and right side plates 3, 3 of the base 1,
By inserting the rotary operation shaft 17 into the guide slot 4 opened in the front-back direction in a state where vertical movement is prevented, it is attached so as to be slidable in the front-back direction, and the rear plate of the slide plate 9 is attached. The part 10 and the rear part of the top plate 5 are connected by a link 11 which is pivotally connected to each other, and the rotary operation shaft is provided with a rotary shaft which, when rotated, rolls into pressure contact with the bottom plate 2 side of the base 1. Since the sliding plate 9 is covered with a transfer rolling element 20 that is movable back and forth, the top plate 5 can be easily moved by simply rotating the rotary operation shaft 17. The top plate 5 can be adjusted to any desired inclination angle, both forward and backward, and has a holding function, so there is no need for a special stopper mechanism, and the top plate 5 can be held at any adjusted inclination angle. be able to.

In addition, since the structure requires a simple mechanism with relatively few members, it can be manufactured at low cost.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of a device for adjusting the tilt angle of a top plate according to the present invention, Fig. 2 is a side view of the device, and Figs. 5, 6, and 7 are vertical sectional side views showing other embodiments of the rotary feeding and holding means for the slide plate in the same device. be. 1... Base, 2... Bottom plate, 3, 3... Left and right side plates, 4... Guide slot, 5... Top plate, 9... Slide plate, 11... Link, 17... Rotation operation shaft ,2
0...Rolling element for transportation.

Claims (1)

[Scope of utility model registration request] A top plate is pivotally supported on the base so that it can be rotated back and forth in a seesaw manner at a desired height, and a slide plate below which is horizontally installed with a rotary operation shaft for free rotation. , can be slid in the front and back direction by inserting the rotary operation shaft into the guide hole opened in the front and back direction on both the left and right sides of the base, with the rotation operation shaft being prevented from moving up and down. The rear plate part of the slide plate and the rear part of the top plate are connected to each other by pivoted links, and the rotary operation shaft is attached to the bottom plate side of the base by rotating it. An inclination angle adjusting device for a top plate, which is provided with a transfer rolling element that presses against and rolls on the slide plate so that the slide plate can be moved back and forth.