JPH0395586A - Fitting stand for large-sized display device - Google Patents

Abstract

PURPOSE:To stabilize the whole fitting stand against its fall by expanding or contracting a horizontal support member according to the vertical expansion/ contraction quantity of a vertical support member which supports the large-sized display device at the upper part. CONSTITUTION:When a slide shaft 13 is elevated to move up the display device 2, a 1st arm 36 rotates counterclockwise around a 1st rotary shaft 32 through a shaft coupling rod 17, so a 1st gear 34 also rotates in the same direction. Therefore, a 2nd arm 37 rotates clockwise through a 2nd gear 35 engaging the gear 34 and a rotary shaft 33. Consequently, a base coupling rod 19 is pressed forward and a slide base 11 moves forward to expand the bottom surface, thereby increasing the stability of the fitting stand 1 against the fall. When the device 2 is lowered, on the other hand, the base 11 is drawn in a support base 10 and becomes short, so the stand 11 is easily moved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of Industry L) The present invention relates to a mounting stand for a large star display device that supports a large display device such as a large television or an entertainment boat.

(Prior Art) For example, there is a mounting stand as shown in FIG. 6, on which a large-sized display device, such as an information board, is mounted to display its contents to a large number of people. This mounting stand attaches the display device 110 to the top of the vertical support 100.
This vertical support 100 is also attached to a horizontal support member 101 which is a base, and is shaped like an inverted T-shape to prevent it from falling over.

Since these large display devices i110 can be viewed from far or near depending on the object being viewed, the vertical support 100 is generally capable of being expanded and contracted up and down.

(Problem to be Solved by the Invention) However, while the vertical support member 100 generally expands and contracts up and down, the horizontal support member 101 remains in a fixed shape. If the center of gravity O of the entire mounting stand including the display device 110 moves upward, the mounting stand will easily fall over and become unstable.

That is, if the height to the center of gravity O is h, and the shortest distance from the point b projected below the center of gravity 0 to the end a of the horizontal support member 101 is h, then this is a measure of stability against falling. The angle θ is expressed as Therefore, the distance llI. Since the sentence is constant,
As the height h increases, the angle θ decreases, making the mounting stand more likely to fall.

In this case, if the horizontal support material 101 is made large (long) from the beginning, even if the height h changes, it is possible to suppress the angle O within a certain limit. Since the member 101 is large, there is a problem in that it becomes difficult to move the mounting stand (for example, to pass through an entrance or exit for a door, etc.).

The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a system in which, even if the vertical support member expands and contracts and a large display device moves upward, there is little change in its stability against overturning. Further, it is an object of the present invention to provide a mounting stand for a large-sized display device that is easy to move.

(Means for Solving the Problems) In order to achieve the object L, the present invention provides a vertical support member having a large display device attached to the upper part and which is expandable and contractible in the vertical direction;
A mounting stand for a large display device that shifts to the right a horizontal support member for fall prevention attached to the lower part of the vertical support member, characterized in that the horizontal support member also expands and contracts in conjunction with the amount of expansion and contraction of the vertical member. shall be.

(Function) Since the horizontal support member expands and contracts in conjunction with the amount of expansion and contraction of the semi-vertical support member, the vertical support member expands and the large display device is positioned at a higher position, making it more likely to fall. However, the horizontal support member can be extended by that amount to stabilize the vehicle against falling.

In addition, if the vertical support member is shortened and a large display device is positioned at a lower position, which increases stability against falling, the horizontal support member is shortened accordingly, ensuring stability and mounting stability. 1 - The whole can be easily moved.

(Example) Embodiments of the present invention will be described below based on the accompanying drawings.

First, the basic structure of the present invention will be explained with reference to FIGS. 1 and 2.

FIG. 1 is a perspective view of a mounting stand 1 for mounting and displaying a large-sized display device such as an information board, and FIG. 2 is a side view thereof.

In FIG. 1, reference numeral 10.10 denotes a pair of hollow support bases each having a rectangular cross-section. Inside the support bases 10, 10 are sliding bases 11.11, which also have a rectangular cross-section and can be swung back and forth. The sliding base 11.11 is movably inserted into the sliding base 11.11.
A horizontal support member of the mounting stand 1 is formed by the support base 10.10 and the support base 10.10. the pair of support bases i
o and io are connected at their upper portions by a horizontal lower support portion 12a of the support frame 12, and are integrally coupled in a rigid state.

The support frame 12 extends in the −1 direction on the support base 10.10, and has an upper support portion 12c horizontally protruding from the front side thereof.
and a pair of sliding shafts 1 parallel to each other between the intermediate support portions 12b.
3.13 is slidably supported up and down, and the sliding shaft 1
3.13 and the support frame 12 form a vertical support member of the mounting stand l. Dry it and remove it.{-1 Stand 1 includes the support bases 10, 10, sliding base 11.
11, a support frame 12, and a sliding shaft 13.13, it is formed into a substantially L-shape.

As shown in FIG. 2, the sliding shaft l3 is supported by a fixing screw 15 (FIG. 2 shows only one sliding shaft l3) of the kite 14 attached to the upper support portion 12c of the support frame l2. It is vertically positioned and supported by the frame l2, and an L-shaped support plate 16 is fixed to the upper end of the frame l2, and the upper part of the pair of sliding shafts l-13. As shown, they are integrally connected. Incidentally, as shown in FIG. 2, a large-sized display device 2 can be attached to the front side of the vertical portion 16a of the support plate 16.

Furthermore, as shown in Figure 1, the lower portions of the pair of sliding shafts 13.13 are also connected by a horizontal shaft connecting rod l7, so that the two sliding shafts 16.16 are integrally connected to the support frame 12. It is freely movable up and down. Further, on the opposing side surfaces of the support bases 10, 10 and the lower part of the support frame 12a, there is a connection rod between the pair of sliding bases 11, 11 and the heath connection rod through elongated holes is, is in the vicinity of the shaft connection rod 17 in the front-rear direction. 19 are combined,
For this reason, the pair of sliding bases 11.11 move back and forth as a unit.

At a vertically intermediate position between the shaft connecting rod 17 and the base connecting rod 19, there is a sliding shaft l-13. A proportional movement mechanism 30 is attached to move the sliding base 11.

The proportional movement mechanism 30 includes a pair of bearing members 31 and 3l that are erected and fixed on the left and right support bases 10 and 10, and the bearing member 3]. , 31, and the shaft connecting rod 1
7 and the pace connecting rod 19. A second rotating rod 32.33, and the first and second rotating rods 32.33.
The first and second gears 34.35 are fixed to the
and first and second arms 36 whose end sides are fixed to the first and second rotating rods 32 and 33, respectively, and whose other end sides are pivotally connected to the shaft connecting rod 17 or the base connecting rod 19.
．． It consists of 37.

Here, as shown in FIG. 2, since the vertical heights of the shaft connecting rod l7 and the first rotating shaft 32 are substantially the same, the first arm 36 is disposed in a substantially horizontal state, and the second rotating shaft Axis 3
Since the second arm 37 is located approximately directly above the base connecting rod 19, the second arm 37 is disposed approximately vertically.

As shown in FIG. 2, for example, the sliding shaft 1
3.13 to raise the display device 2 upward, the shaft connecting rod 17 of the sliding shaft 13.13
Since the first arm 36 rotates counterclockwise with the first rotation shaft 32 around the first rotation shaft 32 through the
The carrier 34 also rotates counterclockwise. Therefore, the second gear 35 that meshes with the first gear 34 rotates clockwise, and the second gear 35 engages with the first gear 34.
The second arm 37 is rotated clockwise via the rotation shaft 33. Since the base connecting rod 19 is pushed forward by this clockwise rotation of the second arm 37, the sliding base 11
．． 11 moves forward by a predetermined value. And this sliding base 1
By moving 1.11 forward, it is possible to raise the display device 2 and stabilize the mounting stand 1, which tends to become unstable against falling.

Also, the sliding shaft 13.13 is lowered, and the display device 2
When attempting to lower the sliding head 11, 11 into the supporting head 10, 10, the sliding head 11, 11 is retracted into the support head 10, 10 by a movement exactly opposite to that described above. In this case, since the display device 2 is lowered, even if the sliding base 11.11 is moved back, the mounting stand 1 is stabilized against falling, and horizontal support consisting of the support base 10.10 and the sliding base 11.11 is achieved. Since the members are shortened as a whole, it becomes convenient to move this mounting stand l to which the display device 2 is attached.

Next, the mounting stand 1 on which the display device 2 is attached as shown in Figure 3.
We will consider the stability against falling.

First, as shown in FIG. 3, the reference center position of the entire mounting stand 1 including the display device 2 is set to O, and from the reference plane of the center of gravity O (in this case, the lower surface of the support base 10.10). The height of h. From the projection point of the center of gravity position O onto the reference plane to the end of the horizontal support member, that is, the pair of sliding bases 10.1
If the distance from the line connecting the ends of 0 to the closest point is expressed as an expression, then the angle θ, which is a measure of whether the mounting stand 1 is stable against falling, is expressed as follows. In this case, if θ approaches zero, the mounting stand 1 will become extremely unstable and will topple over even under the action of a slight external force. Therefore, the stability limit θ is θ. As O. - Standing. /ho Distance ml. and height h. There will be this sentence below. , ha is the standard.

Next, raise the sliding shaft I~13.13 and move the center of gravity O.
If the position of ° is moved by y distance from the 0 position, what is necessary for the mounting stand 1 to be stable against falling? Since the display device 2 is generally considered to be heavier than the iron and the mounting stand 1, the amount of movement of the composite center of gravity can be considered to be the amount of movement of the sliding shaft 13.13. Therefore, due to the proportional movement mechanism 30 described above, x=n.・y
/ h If you let the relationship of o succeed, the mounting stand l
Regardless of the vertical movement of the display device 2, it is possible to always maintain a stable state against falling.

First, assume that the proportional moving machine $30 is as follows.

That is, as shown in FIG. 4, the first and second gears 34.3
5 have the same number of teeth, that is, the gear diameter, and the first and second
When the distances between the supporting points of the arms 36 and 37 are R■ and R2, the following relationship should be established.

Next, based on the above considerations, based on Figures 4 and 5,
The detailed structure of the proportional movement mechanism 30 will be explained.

11. This is because when the rotation angle of the first and second gears is φ, '/ = R 1 φ, X = R2 φ, and by substituting these x and y into the formula ■, the formula ■ can be derived. There is.

l 2 Moreover, the proportional movement mechanism 30 may be as follows.

That is, the distance between the fulcrums of the first and second arms 36.37 is R.
When + = R 2 = R and the number of teeth of the first and second gears 34.35 are Z,, Z2, ? do. This changes the rotation angles of the first and second gears 34.35 to φ1 and φ2.
In this case, y=Rφ1, x=Rφ2, φ2/φ. =2
■/Z2, and by substituting these into the formula ■, the formula ■ can be derived.

In addition, the first and second arms 36 and 37 of the proportional movement mechanism 30
The structure of the first and second gears 34 and 35 is such that the above-mentioned formula (1) or (3) is established, and the first rotating shaft 32 is arranged as a worm 39 as shown in FIG. Saiichi spins around.

That is, the first rotary shaft 32 is attached to the first rotating shaft 32, and the second rotating shaft is rotated by the first rotating shaft 39 with the handle 38. In this way, a large reduction ratio can be obtained, and the sliding shaft 13 that supports the display device 2
．． 13 can be moved up and down with a small force via the handle 38. In this case, since the rotation of the shaft can only be performed by the shaft 39, the fixing screw 15 of the sliding shaft 13.13 shown in FIG.
．． 15 becomes unnecessary.

(Effects of the Invention) As is clear from the following description, according to the present invention, even if the vertical support member supporting a large display device on the upper part is expanded and contracted up and down, the horizontal support member is expanded and contracted in accordance with the amount of expansion and contraction. Therefore, the entire mounting stand can be easily stabilized against falling.

Also, if the vertical support member is shortened to lower the display device's position, the stability against falling will increase, or since the horizontal support member is shortened accordingly, the entire structure will be smaller and the mounting stand will be easier to move. .

[Brief explanation of drawings]

Figure 1 is a perspective view of the mounting stand, Figure 2 is a side view of the mounting stand, Figure 3 is a diagram to explain the stability of the mounting stand against falling, and Figures 4 and 5 are proportional movements. A side view of the mechanism, FIG. 6, is provided to explain the prior art. l...Mounting stand, 2...Display device, 10...
Support heath (horizontal support member), 11...Sliding base (
horizontal support member), 12... support frame (vertical support member), 13... sliding shaft (vertical support member).

Claims (2)

[Claims] (1) A mounting stand for a large display device that has a large display device attached to the upper part, a vertical support member that is expandable and retractable in the vertical direction, and a horizontal support member that is attached to the bottom of the vertical support member to prevent falling. A mounting stand for a large display device, characterized in that the horizontal support member also expands and contracts in conjunction with the amount of expansion and contraction of the vertical member. (2) The height from the horizontal support member to the overall composite center of gravity including the display device is h, the shortest distance from the projection point of this composite center of gravity onto the horizontal support member to the end of the horizontal support member is l, and the vertical 2. The mounting stand for a large display device according to claim 1, wherein when the amount of expansion and contraction of the support member is y, the expansion and contraction x of the horizontal support member is x=l/h×y.