JPH0352839B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to an opening angle between pivot members suitable for use in a table on which feet are placed, for example, when hanging on a chair and doing office work on a desk. Relating to an adjustment device.

[Conventional technology]

For example, when doing desk work, adapting the height of the desk and chair to the user's height will allow the user to maintain a comfortable and natural posture, making it easier to work and reducing fatigue. Furthermore, in such cases, the position where the feet are placed, that is, the height and angle of inclination of the feet, are also important factors in maintaining the correct posture.

However, in such cases, there was no suitable mechanism for arbitrarily adjusting the position of the feet.

[Problem that the invention seeks to solve]

The present invention, like the above-mentioned footrest, pivots at least two members such as a base plate and a placing plate at one end of each other, so that the opening angle between the two members can be freely adjusted. The object of the present invention is to provide a novel pivot member opening angle adjustment device that allows the adjustment to be made smoothly and reliably through easy operation, and with an extremely simple configuration. It is a purpose.

[Means for solving problems]

That is, in the present invention, a first pivoted member and a second pivoted member are pivotally coupled at one side end portion of each so as to be freely openable and closable. A rotatable operating shaft is provided on the open end side of the pivoted member.
and the same shaft is installed via a feeding means provided so that it can be moved in the front and back direction by rotational operation, and is in contact with the operating shaft so that it can be rotated with a sense of moderation with the other pivoted member. It is constructed by permanently installing an opening degree holding member that also serves as opening degree adjustment.

〔Example〕

First, the principle of the present invention will be explained based on the principle diagram shown in FIG.

The first pivoted member 1 and the second pivoted member 2 are
They are pivotally connected by a pivot 3 at one end of each, and both the pivoted members 1 and 2 are connected by the arrow a←→ shown in the figure.
It can be opened and closed in the a′ direction.

Thus, when the first pivoted member 1 is on the fixed side and the second pivoted member 2 is on the movable side, there is a second pivoted member between the first and second pivoted members 1 and 2. An opening degree holding member 4 that also serves as opening degree adjustment with respect to the pivoted member 2,
By rotating the holding member 4, it is arranged via a feeding means (not shown) that can be moved in the front and back direction indicated by arrow b←→b' in the figure, and is used for adjusting the opening degree. By rotating the holding member 4 with the operating shaft on which the holding member 4 is fixed, the holding member 4 is rotated in the direction of arrow b or
By moving while rotating in the b′ direction, the first
The opening angle α of the second pivoted member 2 with respect to the second pivoted member 1 can be adjusted to be larger or smaller.

In other words, the above-mentioned opening degree adjustment/opening degree holding member 4
However, in the figure, when it is at point c, the opening angle is the smallest at α, and when it moves from point c to point c', the opening angle becomes α', and when it moves further to point c'', the opening angle becomes the largest at α''. Therefore, the opening angle can be arbitrarily adjusted in proportion to the distance from the pivot point d of both pivoted members 1 and 2 to the opening adjustment/opening holding member 4.

If this is further described in detail for the case where the foot rest is carried out as shown in Figs. 2 to 7,
A first pivoted member 1 serving as a base and a second pivoted member 2 serving as a footrest plate are connected to a pivot 3 at one end.
The open end side 2a of the second pivoted member 2 pivots in the vertical direction with respect to the first pivoted member 1 about the pivot 3 as a fulcrum, thereby increasing the opening angle α.
is adapted to be adjusted, thereby adjusting the inclination angle of the second pivoted member 2.

Here, the second pivoted member 2 is long in the front-rear direction so as to have a desired inclination angle, has a substantially triangular side surface, and has a top plate that can be crowned on the first pivoted member 2. 2b, left and right side plates 2c, 2c
and is formed by the front plate 2d.

On the other hand, the first pivoted member 1 includes left and right side plates 1a, 1a whose sides are substantially mountain-shaped as shown in FIG. 4, and an angle member 1b installed between the front ends of the side plates 1a, 1a. The above-mentioned side plates 1a, 1a are formed into a substantially U-shaped planar shape with a connecting rod 1c connecting them at their substantially central portions, and the dimensions in the biaxial direction are smaller than the above-mentioned second pivoted member 2. There is a plate on both sides 1a,
By pivoting the rear end of 1a and the brackets 2e, 2e, which are vertically disposed on the top plate 2b from the rear surface of both left and right sides, by the pivot 3, both the pivoted members 1, 2 are connected.
is pivoted.

Then, the open end side 2 of the first pivoted member 2
In case a, there are long holes 2 in the left and right side plates 2c, 2c.
f, 2f are long in the front-rear direction and penetrate through the long holes 2f, 2f in an opposing arrangement, so that the operation shaft 5 can freely rotate in the direction around the axis and move in the direction perpendicular to the axial direction. A knob 5a is fixed to one end of the elongated hole 2f that protrudes outward from one elongated hole 2f.

Near both ends of the operating shaft 5, opening adjustment/opening holding members 4, 4 each formed in a square shape, hexagonal shape, or any other polygonal shape are fixed. It is in contact with the contact surfaces 1d, 1d formed by the left and right side plates 1a, 1a of the pivoted member 1 so as to be able to roll with moderation.

The opening degree adjustment/opening degree holding member 4 is held in contact with the abutting surfaces 1d, 1d only by its own weight and the weight of the second pivoted member 2 and the operating shaft 5. In the illustrated example, a tension spring 6 is stretched between the first and second pivoted members 1 and 2 so that the contact is forcibly made.

Further, the operating shaft 5 can be rotated to open each elongated hole 2.
f, 2f so as to be able to roll in the front-rear direction. By rotating it, it moves to the left, and by rotating it clockwise, it moves to the right.

Here, what is shown as the above-mentioned feeding means 7 is the left and right side walls 2 of the second pivoted member 2.
racks 7a, 7a located inside c, 2c and extending longitudinally along the elongated holes 2f, 2f; and pinions provided at both ends of the operating shaft 5 so as to be able to mesh with the racks 7a, 7a. 7b, 7b.

In addition, in order to reduce the longitudinal movement stroke of the operating shaft 5 and obtain a large opening angle, the long holes 2f, 2f and the contact surfaces 1d, 1d of the first pivoted member 1 should be Either one or both may be provided at an angle.

Therefore, in the illustrated example, both the elongated holes 2f, 2f and the contact surfaces 1d, 1d are formed to be inclined in opposite directions.

That is, the elongated holes 2f, 2f are inclined so as to descend from the open end side 2a of the first pivoted member 2 toward the pivoting portion d, while the abutting surfaces 1d, 1d
is formed on the open end side from the approximate center of the left and right side plates 1a, 1a, and is formed as an inclined surface that descends from the pivot portion d side toward the front, that is, toward the open end side 1e.

In the above configuration, the opening holding member 4 for adjusting the opening and the operating shaft 5 are as shown in FIG.
When it is on the open end side, the opening angle α of both pivoted members 1 and 2 is kept at a minimum, so that the second
The pivoted member 2 is held at the minimum angle of inclination.

In the above state, when the operating shaft 5 is rotated counterclockwise in the figure, the operating shaft 5 is rotated and moved to the left by the feeding means 7.

At this time, the opening degree adjustment/opening degree holding member 4 is similarly rotated, but since the member 4 has a polygonal shape and is held in contact with the abutment surface 1d of the first pivoted member 1, It is rotated in units of each plane, and this rotational movement is given a sense of moderation.

Due to this rotational movement of the opening holding member 4 for adjusting the opening, the opening angle α of both the pivoted members 1 and 2 increases, and as shown in FIG. When the holding member 4 is located at the left end, the opening angle α becomes maximum, thereby causing the second
The pivoted member 2 has the maximum inclination angle.

Therefore, the opening angle α can be arbitrarily adjusted within the effective movement stroke of the opening adjustment/holding member 4 by the feeding means 7, and since the opening adjustment/holding member 4 has a polygonal shape. , it will be held at any adjusted opening angle,
This prevents the opening angle α from changing involuntarily.

In addition, the opening holding member 4 which also serves as opening adjustment is connected to the sixth
It goes without saying that the opening angle α can be gradually reduced by rotating from the position shown in the figure to the right.

〔Effect of the invention〕

Since the present invention is constructed as described above, the operation shaft 5
By rotating forward or reverse by an arbitrary degree, the operating shaft 5 is rotated to the opening degree adjustment/opening degree holding member 4 toward the pivot portion d side and toward the open end side by the feeding means 7. The opening angle α of the two pivoted members 1 and 2 can be adjusted at will, and the opening angle can be adjusted by simply rotating the operating shaft 5.

Furthermore, since the opening degree adjustment/opening degree holding member 4 is brought into contact with the contact surface of the first pivoted member 1 with a sense of moderation, the member 4 can only be rotated by a forced rotation operation. Even if an external force is applied to the pivoted members 1 and 2, they will not rotate unexpectedly, and the adjusted desired opening angle α can be reliably maintained.

Furthermore, since it can be constructed extremely simply by the operation shaft 5 equipped with the opening degree holding member 4 that also serves as opening degree adjustment, and these feeding means 7, it can be manufactured at low cost, and there are almost no failure-causing elements, so it is highly durable. can also be made excellent.

[Brief explanation of drawings]

Fig. 1 is a principle diagram of a device for adjusting the opening degree of a pivot member according to the present invention, Fig. 2 is a perspective view showing an embodiment of a footrest equipped with the same device, and Fig. 3 is a diagram of the same footrest. The plan view, Figures 4 and 5 are - in Figure 3.
6 is a cross-sectional view showing the maximum opening angle state in the same manner as FIG. 4, and FIG. 7 is an enlarged perspective view of the main parts of the same footrest. . 1... First pivoted member, 1d... Contact surface, 2
...Second pivoted member, 2c, 2c...Side wall, 2
f, 2f...Long hole, 4...Opening degree adjustment/opening holding member, 5... Operating shaft, 7... Feeding means, 7a...
...Rack, 7b... Pinion, d... Pivot joint.

Claims (1)

[Scope of Claims] 1. A first pivoted member and a second pivoted member are pivotally coupled at one side end portion of each so as to be freely openable and closable, and between the two pivoted members. , an operating shaft is installed on the open end side of one of the pivoted members via a feeding means provided so as to be rotatable and movable in the front and back direction by rotational operation of the same axis. An opening of a pivot member, characterized in that an opening adjustment/opening holding member is fixedly attached to the operating shaft so as to be able to rotate and move with a sense of moderation with the other pivoted member. Angle adjustment device. 2 A long hole extending in the front-rear direction is formed in the left and right side walls of one of the pivoted members, and an operating shaft is inserted through the long hole so that it can rotate and move freely in the front-rear direction. An opening angle adjusting device for a pivot member according to claim 1. 3. On the other pivoted member, the abutment surface of the opening degree adjustment/opening degree holding member is formed as an inclined surface that slopes downward from the pivoted part side to the open end side. An opening angle adjustment device for a pivot member as described in 2. 4. The opening angle of the pivot member according to claim 1, wherein the feeding means is comprised of a rack provided in the front-rear direction on one pivot member and a pinion provided on the operating shaft. Adjustment device. 5. The opening angle adjusting device for a pivoting member according to claim 1, wherein the opening holding member that also serves as opening adjustment is formed in an arbitrary polygonal shape.