JPH0346079B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a footrest that is placed on a chair to keep the position (height) of the feet appropriate when working at a desk, etc. The present invention relates to an opening angle adjustment device for a pivot member, which can adjust the height of a top plate, etc. supported by the same material, depending on the purpose of use.

For example, when working at a desk, the height of the chair and desk must correspond to the height of the user in order for the user to take a comfortable and natural posture, and the height of the feet is also important. Therefore, the height of existing chairs, desks, and footrests can be adjusted.

[Conventional example]

Conventionally, in the above-mentioned desks, footrests, and others, the overall height has been increased by forming the legs with pivot members and adjusting the opening angle of the pivot members.
It is known that the height can be adjusted freely,
Existing opening angle adjustment devices for pivot members include, for example, a screw rod installed on a frame so that it can be rotated freely, and an actuator screwed onto the screw rod and each pivot member connected by a link mechanism. Most of them were mobile.

However, according to such conventional examples, the screw rods must be provided on both sides, both screw rods must be operated when adjusting the opening angle, and the top plate etc. must be kept in a horizontal position. If it is necessary to adjust the height while maintaining a predetermined angle, there are problems such as the configuration becomes complicated and the operation becomes troublesome.

[Problems to be Solved by the Invention] Therefore, as a result of studies in view of the above-mentioned problems of the conventional example, the present invention has been developed to pivotly connect the pivoted members to each other in a predetermined shape. By constructing the operating shaft from a point to one end so that it can be rotated and moved laterally via an appropriate feeding means, the construction is extremely simple, and the opening angle can be adjusted with easy operation. In other words, the purpose is to be able to quickly adjust the height while keeping the top plate etc. in a predetermined state.

[Means for solving problems]

That is, the present invention provides an arrangement in which one ends of a first pivoted member and a second pivoted member are respectively pivotally connected to the front end and the rear end of the back surface of the top plate. They are pivotally connected to each other so that they form a substantially X-shaped side surface and can be opened and closed, and from the pivot point of either of the two pivoted members. An operating shaft is installed at one end so that it can be moved laterally in the length direction of the pivoted member and can be rotated, and a feeding means is provided so that it can be moved laterally when the operating shaft is rotated. The above-mentioned problem is solved by configuring the operating shaft to be connected to the other pivotally attached member so as to be able to move laterally in the length direction thereof.

〔Example〕

FIG. 1 is a side view showing the simplest embodiment of the present invention, and FIGS. 2 to 6 show embodiments in which the present invention is applied to a footrest.

In the top plate 1 shown in FIG. 1, one end of a first pivoted member 2 and a second pivoted member 3 are rotatably pivoted to the front end and rear end of the back surface of the top plate 1, respectively. The two pivoted members 2 and 3 are pivoted at points a and b, and the two pivoted members 2 and 3 are located at the pivot point c on the back side of the top plate 1, and the side surface is approximately X.
They are pivoted in a criss-cross manner to form a letter-shaped configuration, and are thus rotatable at approximately the center of each.

Here, either one or both of the pivot points a and b of the top plate 1 and both pivoted members 2 and 3 move a predetermined distance in the front-rear direction of the top plate 1. It is pivotally mounted with a pivot inserted through a long hole (not shown) so that it can be moved.

By making both the pivoted members 2 and 3 rotatable around the pivot point c as described above, the pivot points a and b of both members 2 and 3 and the The free ends 2' and 3' can be opened and closed, respectively, and the opening angle α formed by both members 2 and 3 can be arbitrarily adjusted. By adjusting the opening angle α to be larger or smaller, respectively. Thus, the height of the top plate 1 can be adjusted.

Located closer to one end of the pivot point c of the two pivoted members 2, 3, between the two pivoted members 2, 3,
In order to make the operating shaft 4 rotatable and to be able to move laterally in a direction perpendicular to the length direction of the operating shaft 4, the operating shaft 4 is supported and installed on one of the pivoted members, and when the operating shaft 4 is rotated, , the said operating shaft 4 is associated with the other pivoted member via a feeding means (not shown) provided to enable its lateral movement, whereby said operating shaft 4 can be moved. In the figure, when it rotates counterclockwise, it moves to the left by the above-mentioned feeding means, and when it rotates clockwise, it moves to the right, thereby causing the opening angle of both the pivoted members 2 and 3. The configuration is such that α can be adjusted to be large or small.

Next, the embodiment shown in FIGS. 2 to 6 will be described in detail.

In the figure, reference numeral 1 denotes a top plate formed with biaxial dimensions sufficient for placing feet on it, and brackets 5 and 6 are fixed on the left and right sides of the front and rear ends of the top plate, respectively. It has been set up.

Reference numeral 2 indicates a first member to be pivoted, and reference numeral 3 indicates a second member to be pivoted.

The first and second pivoted members 2 and 3 are two structural members 2a and 2a made of band-shaped metal plates, etc., respectively.
And 3a, At one end that becomes the free end of 3a, a continuous rod 2
By constructing b and 3b, each is integrally and independently formed into a framework.

The pivoted members 2 and 3 are connected to the respective structural members 2 and 3.
One end of a, 2a and 3a, 3a is attached to the brackets 6, 6 and 5, 5 at pivots 7, 7 and 8, 8,
It is pivotally connected to the top plate 1 by being rotatably connected, and each free end 2', 3' intersects approximately at the center so as to be oriented in the front-rear direction, and pivots at the intersection. At 9, each component 2a, 3a, 2a,
3a, both pivoted members 2, 3
has a substantially X-shaped side surface and is rotatable about the pivot 9.

4 indicates an operating axis.

This operating shaft 4 is located on one end side from the pivot point c of both the first and second pivoted members 2, 3 in both the constituent members 3a, 3a of the second pivoted member 3, and penetrates through it. It is installed by inserting it into the long holes 10, 10 so as to be rotatable and movable laterally.

Here, the long holes 10, 10 are connected to the component 3.
a, 3a are provided long in the length direction, and the elongated hole 1
0 and 10, the operating shaft 4 has two flanges 4a, 4a fixedly fixed at an appropriate distance in the axial direction near both ends thereof, and a distance between the two flanges 4a, 4a. The opening edge 10a of the long hole 10 is
6, the movement in the axial direction is prevented, and a knob 4 is provided at one end protruding outward from one elongated hole 10.
b is fixed.

The operating shaft 4 is connected to the first pivoted member 2.
In both the structural members 2a, 2a, on one end side from the pivot point c, that is, on the side opposite to the one end side where the long hole 10 provided in the second pivoted member 3 is opened, The coaxial shaft 4 is moved through a feeding means 11 which is provided so as to be able to move laterally along the long holes 10, 10 by rotating the operating shaft 4.
is associated with the pivoted member 2.

That is, long holes 12, 12 are provided on one end side of both the structural members 2a, 2a of the first pivoted member 2, and long holes 12, 12 are provided therethrough in the longitudinal direction.
The operating shaft 4 is inserted through the holes 2 and 12.

Here, as the feeding means 11, racks 11a, 11a are provided along the lower edges of the elongated holes 12, 12 in the two structural members 2a, 2a, while pinions 11b, 11a are provided near both ends of the operating shaft 4. 11
b, respectively, and the pinions 11b, 11b are engaged with the racks 11a, 11a, respectively.
is not limited to the illustrated example, and any configuration may be used as long as the operating shaft 4 can be rotated to move laterally along the elongated holes 10, 10, 12, 12.

Also, by rotating the two pivoted members 2, 3 about their pivot points c, the distance between the pivot points a, b of the two pivoted members 2, 3 with respect to the top plate 11 and the free space between the two pivoted members 2, 3 are adjusted. Since the distance between the ends 2' and 3' changes, one end of the two constituent members 3a, 3a of one of the pivoted members (in the illustrated example, the second pivoted member 3) is connected to the bracket 5. It is movably pivotally connected by inserting a pivot 8 through the elongated hole 5a, thereby making it possible to absorb changes in the distance between the two pivot points a and b.

In the illustrated example, the two pivoted members 2 and 3 serve as legs for the top plate 1, and the free ends 2' and 3' of the two pivoted members 2 and 3 are connected to each other as shown in FIGS. 4 and 5. As clearly shown in the figure, it is held in contact with a stationary surface 13 such as a floor.

Although the top plate 1 in the illustrated example is held in a slightly inclined state, it is of course possible to have other configurations in which it is held in a horizontal state.

Figure 4 shows a state in which the height of the top plate 1 is slightly lower than the intermediate position within the height adjustment range, and Figure 5 shows a state in which the height of the top plate 1 is close to the maximum height. ing.

In FIG. 4, when the operating shaft 4 is rotated clockwise, the operating shaft 4 is moved laterally to the right along the long holes 12, 12 by the feeding means 11, but at this time, the operating shaft 4 is moved to the second Since the pivoted member 3 is moved laterally within the elongated holes 10, 10, one end side of the second pivoted member 3 is lowered with respect to one end side of the first pivoted member 2. Therefore, both the pivoted members 2 and 3 are rotated in the direction of overlapping, and both the pivoted members 2 and 3 are rotated in the direction of overlapping.
The opening angle α becomes smaller.

That is, at the end of the rightward movement of the operating shaft 4, the opening angle α becomes the minimum, and thereby the height of the top plate 1 becomes the lowest.

When the operating shaft 4 is rotated in the counterclockwise direction in the state shown in FIG. As a result, the opening angle α of both members 2 and 3 increases as shown in FIG. 5, and at the end of the leftward lateral movement of the operating shaft 4, the opening angle α becomes maximum.

That is, the height of the top plate 1 can be made highest.

〔Effect of the invention〕

Since the present invention is constructed as described above, the opening angle α of the two pivoted members 2 and 3 can be adjusted at will by simply rotating the operating shaft 4 in the forward and reverse directions. In addition, since the operating shaft 4 is configured to move laterally along the pivoted member 2 or 3 while being rotated, the operation is smooth, and both the pivoted members 2 and 3 have a substantially X-shaped side surface. Since it is pivoted to the shape and the operating shaft 4 is placed on one end side,
By reducing the horizontal movement stroke of the operating shaft 4, the opening angle of the expansion angle can be quickly adjusted. Not only can it be easily formed and does not require any other special structural members, but the feeding means 11 also functions as a stopper, so it can be easily formed without providing a separate stopper and without any special operation. The opening angle can be maintained at a desired angle without any need, and the structure is simple and can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of the simplest embodiment of the opening angle adjusting device for a pivot member according to the present invention, and FIG.
The figure is a perspective view showing an embodiment in which the same device is incorporated into a footrest, FIG. 3 is a plan view of the same embodiment, and FIGS. 4 and 5 are viewed along the - line in FIG. 3 in the direction of the arrow. FIG. 6 is a partially enlarged perspective view showing the relationship between the first and second pivoted members, the operating shaft, and the feeding means in the same embodiment. 1... Top plate, 2... First pivoted member, 3...
Second pivoted member, 4... Operating shaft, 4a, 4a...
...Flange, 10... Long hole, 10a... Opening edge of the long hole, 11... Feeding means, c... Pivoting point of both pivoted members.

Claims (1)

[Scope of Claims] 1. On the back surface of the top plate, etc., one end of a first pivoted member and a second pivoted member are pivotally attached to the front end and rear end of the top plate, etc., so that both the pivoted members are pivoted. The attached members are pivotally connected to each other so as to form a substantially X-shaped side surface and can be freely opened and closed. An operating shaft is installed from the landing point to one end so that it can be moved laterally in the length direction of the pivoted member and can be rotated, and is installed so that it can be moved laterally when the operating shaft is rotated. 1. An opening angle adjustment device for a pivot member, characterized in that the operating shaft is linked to the other pivot member so as to be able to move laterally in the length direction thereof. 2. Adjusting the opening angle of the pivot member according to claim 1, in which one pivot member is provided with an elongated hole in its length direction, through which the operating shaft can be rotated and moved laterally. Device. 3 Axial movement of the operating shaft is prevented by slidably fitting the opening edge of the long hole of the pivoted member between two flanges arranged in parallel at a distance at each end of the operating shaft. An opening angle adjusting device for a pivot member according to claim 1.