JPH0346080B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, a footrest on which the feet are placed when hanging on a chair and working at a desk, a top plate member supported by other pivot members, etc. The present invention relates to an opening angle adjustment device for a pivot member, which is applied to a device whose inclination and height are adjusted depending on the purpose of use.

For example, when working at a desk as mentioned above, in order for the user to take a comfortable and natural posture, the height of the chair and desk must correspond to the height of the user. Since the condition is also important, efforts are being made to make the height of existing chairs, desks, etc. adjustable.

[Conventional example]

Conventionally, in the above-mentioned desks, chairs, etc., the legs, etc. are formed by pivot members, and by adjusting the opening angle of the pivot members, the inclination angle and height of the top plate member can be adjusted. However, this type of opening angle adjustment device for a pivot member has problems in terms of its structure and operability, such as its complicated structure and its cumbersome and time-consuming operation. There is.

[Problem that the invention seeks to solve]

Therefore, as a result of studies in view of the above-mentioned conventional problems, the present invention has been developed by pivoting both the first and second pivoted members in a substantially X-shape on the side, and pivoting one end of the one member to one end of the top plate member. The operating shaft is connected to one end of the two pivotally attached members so as to be movable laterally by rotation, and one end of the other member is connected to one end of the other member via a threaded feeding means. By connecting the other end of the top plate member with the third pivoted member, the opening angle of both the first and second pivoted members and the third pivoted member are connected. The opening angle of each member can be quickly and easily controlled, and each member can be operated independently, thereby not only making it possible to adjust the height of the top plate member while keeping it in a desired state, but also The purpose is to simplify and accurately adjust only the inclination angle.

[Means for solving problems]

That is, in the present invention, the first pivoted member and the second pivoted member are formed into a substantially X-shaped side surface, and are pivotally connected to each other so as to be openable and closable. One end of one pivoted member is pivotally coupled to one side end of the top plate member, and one end of the other pivoted member is coupled to a screw-type height adjustment means supported on the same member and a third pivoted member. Pivotally connected to the other side end of the top plate member via a member, located on one end side from the pivot point of both the pivoted members, and having an operating shaft rotatably attached to the one pivoted member, The operating shaft is installed so that it can be moved laterally in the length direction of the same member, and the operating shaft is laterally moved to the other pivoted member via a feeding means that is provided so that it can be moved laterally when the operating shaft is rotated. The above-mentioned problem is solved by configuring the device to be movable.

〔Example〕

1 and 2 show the simplest embodiment of the present invention, and FIGS. 3 to 8 show embodiments in which the present invention is applied to a footrest.

In FIGS. 1 and 2, the first pivoted member 1
and the second pivot-attached member 2 so as to form a substantially X-shaped side surface, and are pivoted at the intersection, and are rotatable about the pivot point a as a fulcrum, so that the opening angle α is Things are starting to change.

One end of the second pivoted member 2 is pivotally attached to the back surface of one side end of the top plate member 3, and a screw type feeding means 4 is provided at one end of the first pivoted member 1. One end of the pivoted member 1 is connected to the top plate member 3 by pivotally connecting the feeding means 4 and the other end of the top plate member 3 with a third pivoted member 5. Accordingly, each of the pivoted members 1, 2, and 5 constitutes a leg portion of the top plate member 3, and the other ends of the two pivoted members 1, 2 are brought into contact with the stationary surface G. It can be held in an upright position.

The operation shaft 6 is rotatable from the pivot point a of the first and second pivoted members 1 and 2 on one end side of the members 1 and 2, and The operating shaft 6 is supported so as to be movable laterally in the length direction, and the operating shaft 6 is disposed between it and the other pivoted member 2.
The operating shaft 6 is configured to be associated with the other pivoted member 2 through a feeding means (not shown) which is provided so that it can roll and move laterally when the operating shaft 6 is rotated. Then, by rotating the operating shaft 6 in the forward or reverse direction, the operating shaft 6
is laterally moved leftward or rightward in the figure, so that the opening angle α of both the pivoted members 1 and 2 is adjusted.

Here, the screw type feeding means 4 is formed from a screw rod and an actuator (not shown).

Next, an embodiment of the footrest will be described in detail based on the drawings.

A top plate member 3 having biaxial dimensions sufficient for placing feet as shown in FIGS. 3 to 8.
is inclined slightly downwardly toward the rear, and brackets 3a, 3a, 3b, and 3b are provided on the back side of the front end and on the left and right sides of the rear end.

Both the first and second pivoted members 1 and 2 constituting the leg base of the top plate member 3 have two left and right constituent members 1a, 1a, 2a, 2a made of band-shaped metal plates at the other end, respectively. A frame is formed by constructing the connecting rods 1b and 2b, and the two pivoted members 1 and 2 intersect in a substantially X-shape on the side, and the intersection point is pivoted by a pivot 7. This allows it to be opened and closed freely.

One end of the constituent members 2a, 2a of the second pivoted member 2 of the two pivoted members 1, 2 is pivotally coupled to the bracket 3a of the top plate member 3 by a pivot 8, while the second One end of the third member 5, 5 is pivotally connected to one end of both component members 1a, 1a of the first member 1, with a screw-type feeding means 4 interposed therebetween. By connecting the other ends of the third pivoted members 5, 5 to the brackets 3b, 3b through pivots 10, 10, one end of the first pivoted member 1 and the top plate are connected. The member 3 is pivoted.

Here, as clearly shown in FIG. 8, the screw-type feeding means 4 has an operating screw rod 4a rotatably attached to both structural members 1a, 1a of the first pivoted member 1, and in the axial direction. The movement of washia 4b,
It is blocked by a pin 4c or the like, and its one end projects outward to fix the knob 4d.
Reverse threaded portions 4e and 4f are cut on both left and right sides in the longitudinal direction of the operating screw rod 4a, and are formed by threading actuators 4g and 4h, respectively.

Thus, one end of the pivoted members 5, 5 is pivotally connected to each of the actuators 4g, 4h by the pivot shafts 9, 9,
By applying a reaction force to the pivoted members 5, 5, the knob 4d rotates the operating screw rod 4a in the forward or reverse direction, thereby causing the actuators 4g, 4h to spiral outward symmetrically. or counter-screws inward, whereby the opening angle β of the third pivoted members 5, 5 with respect to the operating screw rod 4a is adjusted to be large or small.

Further, by changing the opening angle α of the two pivoted members 1 and 2, the two constituent members 1a and 1
Since the dimensions between the pivot points b and c between a, 2a, 2a and the top plate member 3 change, the dimensions between the third pivoted members 5, 5 and the top plate member 3 are adjusted so that the changes can be absorbed. The pivot point c is formed as follows.

That is, one end of the fourth pivotally attached member 11, 11 is pivotally connected to the brackets 3b, 3b by the pivot shafts 9, 9 so as to be rotatable in the front-rear direction, that is, in the left-right direction in FIGS. 5 and 6, One end of the third pivoted member 5, 5 is connected to the other end of the third pivoted member 11, 11 by a pivot shaft 1.
At 2 and 12, it is pivotably mounted to be rotatable in the left-right direction, that is, in the longitudinal direction of the operating screw rod 4a in FIGS. 5 and 6.

That is, the third pivot-attached members 5, 5 are pivotally attached so as to be rotatable in two axial directions, thereby absorbing dimensional changes between the two pivot points b and c, and improving the third pivot-attached members 5, 5. The opening angle β of the pivot members 5, 5 can be adjusted.

Both the first and second pivoted members 1 and 2 are
At one end side from the pivot point a, both the constituent members 1a, 1a of the first pivoted member 1 have an operating shaft 6 extending through elongated holes 13, 13 in the length direction thereof.
The knob 6a is inserted and installed so as to be rotatable and movable laterally along the elongated holes 13, 13, while preventing movement in the axial direction, and a knob 6a is fixed to one end projecting outward. There is.

On the other hand, long holes 14, 14 are formed in both the structural members 2a, 2a of the second pivoted member 2 at positions and lengths corresponding to the long holes 13, 13, respectively.
The operating shaft 6 is inserted into the elongated holes 14, 14 so as to be connected to the pivoted member 2.

Further, the operation shaft 6 is rotated in the normal and reverse directions, so that the operation shaft 6 can open the long holes 13, 13, 14, 14.
As described above, the feeding means 15 is configured to be moved laterally along its length.
It is associated with the second pivoted member 2.

Here, the operation shaft 6 has two parts near both ends.
flanges 6b, 6b are fixed at appropriate intervals in the axial direction, and between the two flanges 6b, 6b, the elongated hole 13 in the first pivoted member 1,
As clearly shown in FIG. 7, the opening edges 13a, 13a of No. 13 are slidably engaged to prevent movement in the axial direction.

Further, according to the illustrated example, as clearly shown in FIG. 7, the feeding means 15 is provided with racks 15a, 15a in the longitudinal direction at the lower edges of the elongated holes 14, 14, and on the other hand, the operating shaft 6 Pinions 15b, 15b are provided near both ends of the pinion 15, respectively.
b, 15b are engaged with the racks 15a, 15a, whereby the operating shaft 6 is rotated so that it can roll and move laterally. Any other configuration may be used as long as it can be moved laterally by being rotated.

In the above configuration, when the operating shaft 6 is at the right end in the drawing of both the elongated holes 13, 13, 14, 14 as shown in FIG. The opening angle α of 2 is kept at a minimum, so that the height of the top plate member 3 is at the lowest position.

When the operating shaft 6 is rotated counterclockwise in the figure from the state shown in FIG. 5, the operating shaft 6 is moved laterally while rolling to the left by the feeding means 15.

As a result, both the first and second pivoted members 1 and 2, which are connected so that the operation shaft 6 can be moved laterally, rotate in symmetrical directions about the pivot point a, and the opening angle α is large. Become.

In this way, at the end of the leftward lateral movement of the operating shaft 6, the opening angle α becomes maximum as shown in FIG.

Furthermore, when the operating shaft 6 is rotated to the right in the figure from the state shown in FIG. becomes smaller.

On the other hand, when the operating screw rod 4a of the screw-type feeding means 4 is rotated in one direction, the reverse screw portion 4
Each actuator 4g, 4h is screwed into e, 4f, respectively.
are located close to each other, as shown by the solid line in FIG. The inclination angle γ of No. 3 is kept the smallest, so the top plate member 3 is kept in a substantially horizontal state.

In the state shown by the solid line in Fig. 8, the operating screw rod 4a
When the actuators 4g and 4h are rotated in the other direction, the actuators 4g and 4h are screwed in symmetrical directions on the rod by the reverse screw threads 4e and 4f, and at the end of the screw, as shown by the two-dot dashed line in FIG. By moving to the outermost position, the opening angle β of the pivoted members 5, 5 becomes the maximum, and thereby the top plate member 3 has the pivot point b with the second pivoted member. As a fulcrum, the other end is pushed upward and rotated.

Therefore, the inclination angle γ of the top plate member 3 becomes maximum.

〔Effect of the invention〕

Since the present invention is configured as described above, it is possible to operate both the pivoted members 1 and 2 by simply rotating the operating shaft 6 in the normal or reverse direction and moving it laterally in the length direction of the pivoted members 1 and 2. Opening angle α of pivoted members 1 and 2
can be arbitrarily adjusted to be larger or smaller, and the operating shaft 6 is constructed by being connected from the pivot point a of both pivoted members 1 and 2 to one end side via the feeding means 15. , compared to a configuration in which the operating shaft rotates at a fixed position, the rotation and lateral movement can be performed smoothly, and the short lateral movement stroke of the operating shaft 6 allows both the pivoted members 1 and 2 to be rotated smoothly. The opening angle α of the third pivoted members 5, 5 can be widened and the opening angle β of the third pivoted members 5, 5 can be adjusted quickly by widening the opening angle α of the third pivoted members 5, 5. For example, when it is necessary to adjust the height of the top plate member 3 and the angle of inclination γ, such as a footrest, the height and angle of inclination γ of the top plate member 3 can be adjusted to each other. This has the advantage that each adjustment can be made appropriately without changing the settings.

[Brief explanation of drawings]

Fig. 1 and Fig. 2 are schematic side views showing an embodiment of the opening angle adjustment device for a pivot member according to the present invention in an operating state, and Fig. 3 is a schematic side view showing an embodiment of the device for adjusting the opening angle of a pivot member according to the present invention, and Fig. 3 is a side view showing the device in its operating state. A perspective view of the embodiment, FIG. 4 is a plan view of the embodiment, and FIGS. 5 and 6 are longitudinal sectional side views of the operating state viewed along the - line in FIG. 4 in the direction of the arrow.
FIG. 7 is an enlarged perspective view showing an embodiment of the operating shaft feeding means in the same device, and FIG. 8 is an enlarged vertical sectional front view showing one embodiment of the screw type feeding means in the same device. 1... First pivoted member, 2... Second pivoted member, 3... Top plate member, 4... Screw type feeding means,
4a...operating screw rod, 4e, 4f...reverse threaded part,
4g, 4h... Actuator, 5... Third pivoted member, 6... Operation shaft, 15... Feeding means, a... Pivotal point of both the first and second pivoted members.

Claims (1)

[Scope of Claims] 1. A first pivoted member and a second pivoted member are formed into a substantially X-shaped side surface and are pivotally connected to each other so as to be openable and closable, and which one of the two pivoted members One end of one pivoted member is pivotally coupled to one side end of the top plate member, and one end of the other pivoted member is connected to a threaded feeding means supported on the same member and a third pivoted member. is pivotally connected to the other side end of the top plate member through the pivot point, and is located on one end side from the pivot point of both the pivoted members, and has an operating shaft rotatably attached to the one pivoted member, and The operating shaft is connected to the other pivoted member via a feeding means that is installed so that it can be moved laterally in the length direction of the same member, and is provided so that it can be moved laterally when the operating shaft is rotated. An opening angle adjusting device for a pivot member, characterized in that the device is connected to allow horizontal movement. 2. The screw-type feeding means pivotally connects one end of the third pivoted member to each actuator screwed into the reverse threaded portion of the operating screw rod rotatably installed at the end of the third pivoted member. An opening angle adjustment device for a pivot member according to claim 1, which is formed in a connected manner.