JPH08328483A - Supporting stand - Google Patents

Abstract

PURPOSE: To enable a user to continuously and easily adjust a height and oscillation without touching a detaining mechanism. CONSTITUTION: A lifting strut 13 is freely liftably housed in a hollow stationary strut 12. The detaining mechanism 14 fixed to the stationary strut 12 applies an adjustable surface pressure on the lifting strut 13 and detains the lifting strut 13 continuously turnably and liftably into the stationary strut 12 by the friction force following the surface pressure. The vertical lifting and lateral turning of the lifting strut 13 are made possible by acting the turning force or lifting force exceeding the friction force following the surface pressure on the lifting strut 13 while the detaining state by the detaining mechanism 14 is maintained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a support stand in which height adjustment and swing adjustment can be performed steplessly and easily without tampering with a locking mechanism.

[0002]

2. Description of the Related Art A stationary type personal computer or word processor generally uses a CRT display as a display device. However, a CRT picture tube is large in size and inefficient in space as compared with a liquid crystal display. Some stationary word processors and the like have a large-screen liquid crystal display as a display device supported by a support stand or the like for use on a table. For example, a conventional support stand 1 shown in FIG. 5 used for this type of application.
Accommodates an elevating column 3 having a screw portion 3a engraved over most of the axial length in a fixed column 2 with a base placed on a table, and is screwed into the fixed column 2 from the side. Tightening screw 4
Is configured to be locked in the screw groove of the screw portion 3a so as to lock the lifting column 3. The liquid crystal display 5 is fixed to the upper end of the lifting column 3.

[0003]

In the conventional support stand 1 described above, when the height of the elevating column 3 is adjusted, the tightening screw 4 is first loosened to release the engagement with the elevating column 3 slightly. However, if the fastening screw 4 is completely unlocked from the lifting column 3, the lifting column 3 may drop in the fixed column 2 at once due to the weight of the liquid crystal display 5 and its own weight. This locking work needs to be done carefully. In this way, if the tip of the elevating column 3 is slightly locked to the screw part 3, then the elevating column 3 is rotated relative to the fixed column 2 while rotating the elevating column 3 in the manner of adjusting the height of the swivel chair. Then, the tightening screw 4 is tightened at an appropriate height. However, since the liquid crystal display 5 does not always face the front when the elevating column 3 is moved up and down to a desired height, the direction of the fixed column 2 itself needs to be readjusted if necessary.

Therefore, the conventional support stand 1 has a high degree of troublesome work such as detightening and re-tightening of the tightening screw 4 or a slight deviation of the direction caused by adjusting the height of the elevating column 3. Therefore, there is a problem in that the operator or the like who wants to easily adjust the orientation of the liquid crystal display 5 according to the room lighting and the work posture has many dissatisfactions in terms of usability. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and includes a hollow fixed column, an elevating column vertically accommodated in the fixed column, and a fixed column fixed to the fixed column. A locking mechanism for exerting an adjustable variable surface pressure on the elevating column and for locking the elevating column in the fixed column so that the elevating column can be steplessly rotated and raised and lowered by a frictional force associated with the surface pressure. It is a feature.

Further, according to the present invention, the locking mechanism includes an outer cylinder fitted and fixed to a tip portion of the fixed column, and an inner cylinder held in the outer column and through which the elevating column is inserted. The curved plate held in contact with the outer peripheral surface of the inner cylinder and held in the outer cylinder is threadedly inserted into the fixed column, and the tip contacts the curved plate to urge the curved plate to the inner cylinder. However, a tightening screw that applies the surface pressure by pressing the inner wall surface of the inner cylinder against the outer wall surface of the elevating column is provided.

[0007]

According to the present invention, the elevating column is housed in the hollow fixed column so that it can be moved up and down, and the locking mechanism fixed to the fixed column exerts an adjustable variable surface pressure on the elevating column. By frictionally holding the lifting column in the fixed column so that it can be rotated and lifted infinitely, when a turning force or lifting force exceeding the frictional force due to the surface pressure is applied to the lifting column, It is possible to adjust the height or the orientation of the elevating column while maintaining the locked state by the locking mechanism.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 is a schematic front view showing an embodiment of a support stand of the present invention, FIG. 2 is an exploded perspective view of the locking mechanism portion shown in FIG. 1, and FIG. 3 is a locking mechanism portion shown in FIG. 4 is a vertical cross-sectional view, and FIG. 4 is a cross-sectional view taken along the line IV-IV of the locking mechanism portion shown in FIG.

The support stand 11 shown in FIG. 1 supports an object to be supported such as a liquid crystal display so that the height can be adjusted steplessly or can be swung. Support stand 11
Is housed in a hollow fixed column 12 in which a fixture 12a for fixing to the end of the desk 20 is integrated at the lower end so as to be able to move up and down, and a mounting portion 13a for a liquid crystal display or an L-shaped arm is provided at the tip. The elevating column 13 has a structure in which it is assembled via a locking mechanism 14. The fixed column 12 and the elevating column 13 are made of metal pipes having the same axial length, and the outer diameter of the elevating column 13 is only about half the inner diameter of the fixed column 12. Therefore, the elevating column 13 which is loosely inserted in the fixed column 12 cannot be held without the locking mechanism 14, and is locked by the presence of the locking mechanism 14 so as to be vertically movable and rotatable.

The locking mechanism 14 is, as shown in FIGS.
The outer cylinder 15 fitted to the tip of the fixed column 12, the inner cylinder 16 held in the outer column 15 and through which the elevating column 13 is inserted, and the outer cylinder 15 are attached to the outer peripheral surface of the inner column 16. Outer cylinder 15
And a tightening screw 18 that presses the curved plate 17 against the inner cylinder.

The outer cylinder 15 is made of a plastic cylindrical body having a flange portion 15a which engages with an opening edge of the fixed support column 12 at its upper end, and the upper and lower portions of the cylindrical body are lift columns 13a and 13b.
Has an inner diameter such that it can slide smoothly, while the intermediate portion sandwiched between the upper and lower portions of the tubular body is slightly enlarged for mounting the inner cylinder 16. A window portion 15b for mounting the inner cylinder is formed in a notch in a range of about 1/4 of the outer circumference in the middle portion thereof, and has a shape that is substantially filled by the curved plate 17. Further, screw holes 15c for fixing to the fixed support column 12 are formed at two locations on the outer peripheral surface of the outer cylinder 15 in the vicinity of the flange section 15a, and a stopper for inserting the fixed support column 12 into the screw hole 15c is formed. The outer cylinder 15 is fixed to the fixed column 12 by screwing the screws 19 together.

The inner cylinder 16 is made of a plastic cylindrical body having an outer diameter slightly larger than the inner diameter of the middle portion of the outer cylinder 15 and an inner diameter equal to the inner diameter of the outer cylinder 15.
It has an axial length slightly smaller than the height of 5b. For this reason,
Drop it into the middle part of the outer cylinder 15 through the window 15b,
The insertion hole for the lifting column 13 can be communicated with the outer cylinder 15 and the inner cylinder 16. The inner cylinder 16 dropped into the outer cylinder 15 is prevented from moving in the vertical direction by the upper and lower parts of the outer cylinder 15, but can freely rotate inside the outer cylinder 15 before being pressed by the bending plate 17. It is ready.

The curved plate 17 is made of a metal plate having a curved surface that is in close contact with the outer wall surface of the inner cylinder 16. As described above, the curved surface of the inner cylinder 16 is brought into close contact with the outer peripheral surface of the inner cylinder 16. , And acts as a friction plate that gives a desired turning resistance or lifting resistance to the lifting column 13 by adjusting the pressing force.

The tightening screw 18 includes a screw portion 18a which is screwed into a screw hole 12b formed in the fixed support column 12, and a screw portion 1.
8a and a grip portion 18b assembled to the screw portion 18
a Tip of the curved plate 17
To press against the inner cylinder 16.

In assembling the support stand 11, first, the inner cylinder 16 is dropped into the outer cylinder 15 through the window 15b. Next, the lifting column 13 is inserted into the outer cylinder 15 and the inner cylinder 16. Further, the curved plate 17 is attached to the window portion 15b of the outer cylinder 15.
Then, the outer cylinder 15 is fitted to the tip of the fixed support column 12 in this state, and the outer cylinder 15 is fixed by the set screw 19 penetrating the fixed support column 12. Finally, the tightening screw 18 is screwed into the screw hole 12b, and the tip of the screw portion 18a is bent to the curved plate 17
Tighten until it abuts and locks. As a result, the elevating column 13 is temporarily assembled to the fixed column 12. After that, the liquid crystal display 5 is attached to the mounting portion 13a at the tip of the elevating column 13, and the tightening screw 18 is tightened to such an extent that the elevating column 13 does not wobble due to the weight of the liquid crystal display 5.

In this case, as the tightening screw 18 is tightened, the curved plate 17 presses the inner cylinder 16 more strongly,
The inner wall surface of the inner cylinder 16 penetrates into the elevating support column insertion hole of the outer cylinder 15, and the inner wall surface of the inner cylinder 16 horizontally distorts the outer wall surface of the elevating support column 13 that passes through the outer cylinder 15. Therefore, as the degree of this eccentricity increases, the rotational resistance and the vertical resistance of the vertical support column 13 increase. That is, since the inner cylinder 16 presses and abuts the outer wall surface of the elevating support column 13 with the inner wall surface, if the friction force between the inner cylinder 16 and the elevating support column 13 is greater than the frictional force obtained by multiplying the surface pressure, The lifting column 13 can be rotated or moved up and down without changing the tightening state of the tightening screw 18.

The frictional force obtained by multiplying the surface pressure by the coefficient of friction between the inner cylinder 16 and the lifting column 13 is required to exceed the total weight of the liquid crystal display 5 and the lifting column 13 to some extent. However, if the tightening screw 18 is tightened too strongly, it is not easy to move up and down or rotate the elevating column 13, so it is advisable to give optimum clamping force by repeating trial and error several times.

In this way, once the optimum tightening force is set, the liquid crystal display 5 attached to the attachment 13a can be adjusted according to the eye level, or the orientation of the liquid crystal display 5 can be adjusted by the locking mechanism 14. It can be easily adjusted without touching. Normally, fixed column 1
It is possible to hold 2 with one hand and hold the lifting column 13 with the free hand to move the lifting column 13 up or down against the frictional force associated with the surface pressure. In this case, it is not necessary to loosen the tightening screw 18 as in the conventional case, and since the height adjustment and the direction adjustment can be performed independently and steplessly, the burden on the operator is greatly reduced.

In the above embodiment, the case where the liquid crystal display 5 is directly fixed to the tip of the lifting column 12 is taken as an example, but as shown by the two-dot chain line in FIG. The L-shaped arm 21 may be extendedly connected and the liquid crystal display 5 may be supported at the tip of the L-shaped arm 21.

The support stand 11 is not limited to supporting the liquid crystal display 5, but can be widely applied to support other lighting equipment such as a fluorescent lamp, audio equipment such as a speaker, and office machines. is there.

[0021]

As described above, according to the present invention,
The lifting column is housed in the hollow fixed column so that it can be moved up and down, and the locking mechanism fixed to the fixed column applies adjustable surface pressure to the vertical column, and the lifting column is fixed in the fixed column by the frictional force associated with the surface pressure. Since it is configured so that it can be rotated infinitely and can be raised and lowered, the locking mechanism is locked by applying a turning force or a lifting force that exceeds the frictional force due to the surface pressure to the lifting column. You can move the lifting column up and down or rotate it left and right while maintaining it.
Therefore, when it is used as a support for a liquid crystal display, for example, the height and direction of the liquid crystal display can be easily adjusted with a slight force, and the like, an excellent effect is exhibited.

Further, according to the present invention, an outer cylinder having a locking mechanism fitted and fixed to a tip portion of a fixed support, an inner cylinder held in the outer cylinder, through which the elevating support is inserted, and an outer periphery of the inner cylinder. A curved plate held in contact with the surface and held by the outer cylinder and a fixed column are screwed and inserted, and the tip comes into contact with the curved plate to urge the curved plate toward the inner cylinder, and the inner wall surface of the inner cylinder is lifted up and down. Since it is composed of a tightening screw that presses against the outer wall surface of the inner cylinder and exerts surface pressure, the curved plate presses the inner cylinder more strongly as the tightening screw is tightened. When the inner wall surface of the inner cylinder is inserted into the inner cylinder, the outer wall surface of the elevating column that penetrates the outer cylinder is horizontally biased, so that the rotation resistance and the elevating resistance of the elevating column can be increased. Since the inner wall surface is pressed against the outer wall surface of the lifting column, the friction coefficient between the lifting column and the inner cylinder is reduced With the frictional force obtained by multiplying,
The lifting column can be supported by the lifting column and the object to be supported, and the lifting column can be easily rotated or moved up and down without changing the tightening state of the tightening screw simply by moving the lifting column with a force exceeding this frictional force. There is an effect such as being able to.

[Brief description of drawings]

FIG. 1 is a schematic front view showing an embodiment of a support stand of the present invention,

FIG. 2 is an exploded perspective view of a locking mechanism portion shown in FIG.

FIG. 3 is a vertical cross-sectional view of a locking mechanism portion shown in FIG.

FIG. 4 is a cross-sectional view taken along the line IV-IV of the locking mechanism portion shown in FIG.

FIG. 5 is a partially cutaway schematic front view showing an example of a conventional support stand.

[Explanation of symbols]

 5 Liquid Crystal Display 11 Support Stand 12 Fixed Column 13 Elevating Column 14 Locking Mechanism 15 Outer Cylinder 16 Inner Cylinder 17 Curved Plate 18 Tightening Screw 19 Set Screw

Claims (2)

[Claims] 1. A hollow fixed column, an elevating column accommodated in the fixed column so as to be able to move up and down, fixed to the fixed column, exerting an adjustable variable surface pressure on the elevating column, and friction accompanying the surface pressure. A support stand, comprising: a locking mechanism that locks the elevating support column in the fixed support column by a force so that the elevating support column can be steplessly rotated and moved up and down. 2. The locking mechanism includes an outer cylinder fitted and fixed to a tip portion of the fixed column, an inner cylinder retained in the outer cylinder and through which the elevating column is inserted, and an inner cylinder of the inner cylinder. The curved plate held in contact with the outer peripheral surface and held by the outer cylinder and the fixed column are screwed and inserted, and the tip contacts the curved plate to urge the curved plate toward the inner cylinder. The support stand according to claim 1, further comprising a tightening screw that applies the surface pressure by pressing an inner wall surface of the cylinder against an outer wall surface of the elevating column.