JPS6116837Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for fixing the rotation of a double-sided rotary sign board with legs and maintaining the posture in use.

FIG. 1 shows a perspective view of a double-sided rotation indicator plate with legs. 1 is a sign board, with horizontal axes 2 on both left and right sides.
is fixed and supported by the left and right pillars 4 of the leg 3 so that it can freely rotate around a horizontal axis of rotation AB. Supporting types include a bearing hole (not shown) provided near the upper end of the pedestal 4 through which the horizontal shaft 2 is inserted, or a U-shaped groove 5 formed in the upper end of the pedestal 4 to accommodate the horizontal shaft. There is one in which the two are engaged.

The above-mentioned signboard 1 is usually formed in a rectangular shape, and has blackboards, whiteboards, display boards, etc. on both sides thereof.

The above double-sided rotary sign board with legs requires that the sign board 1 be rotated arbitrarily around the rotation axis A-B to use the front and back sides, and that it be fixed in the position in use as shown. Therefore, a rotary fixing device that can be freely rotated and released is provided.

The above-mentioned fixing devices commonly used in the past include a type in which the sign board 1 is clamped from both the front and back sides, and a type in which a brake piece is pressed against the edge of the sign board 1.

FIG. 2 shows an example of a clamping type fixation device. This fixing device is equipped with two ratchet pawls 6, and when the edge of the sign plate 1 rotates in the direction of arrow C or arrow D and comes into contact with it, it automatically clamps the ratchet pawl 6, and releases it when the release lever 7 is pushed down. It is becoming more and more like this. This model secures the blackboard securely,
Although it has the advantage of not applying excessive force to the horizontal shaft 2, it is a complicated, large and expensive device.

3 and 4 each show an example of a braking piece pressing type fixing device.

FIG. 3 shows a fixing device configured to press the brake piece 8 against the vertical edge of the sign plate 1 by means of a lever and a screw. The lever 9 is curved at an angle θ and has a notch 9a, and a brake piece 8 is attached to one end of the notch 9a. Reference numeral 10 denotes a shaft fixed to the pillar 4 for engagement with the notch 9a. A threaded rod 11 is attached through the lever 9 and the pillar 4, and a threaded handle 12 is screwed thereto. This handle 1
2, the lever 9 is rotated clockwise around the apex of the angle θ as a fulcrum, and the brake piece 8 attached to this lever comes into contact with the vertical side of the sign plate 1 and presses it in the direction of arrow E. do. This conventional fixing device has the following drawbacks. (a) As can be easily understood from FIG. 1, when a pressing force E is applied to only one side of the sign board 1, a force in the thrust direction is applied to the horizontal shaft 2, causing the sign board 1 to escape in the direction of arrow E. For this reason, a pair of fixing devices of this type (FIG. 3) must be provided symmetrically. Providing one pair not only doubles the installation cost but also doubles the number of operations. (B)
As can be easily understood from FIG. 3, in order to install a fixing device of this type (FIG.
It is necessary to fix the screw rod 11 and perform processing such as drilling a hole for the screw rod 11.

FIG. 4 shows a conventional fixing device using double levers. A brake piece 8' is attached to the tip of one side of the L-shaped lever 13, and a pair of brackets 14 (only one bracket is shown) is fixed to the other side, and the pair of brackets 14 supports the pillar 4. An operating lever 15 is rotatably mounted on a shaft 16 at the distal end of the grip. This fixing device is the operating lever 15.
When the lever 13 is turned in the direction of the arrow G, the lever 13 is pulled toward the pillar 4 and rotated in the direction of the arrow H around the lower end of the lever 13, so that the brake piece 8' comes into contact with the lower edge of the sign plate 1. Press the sign board 1 in the direction of arrow F. This conventional fixing device has the following drawbacks. (b) As can be easily understood from Fig. 1, when a force F in the upward direction is applied to the lower edge of the sign board 1, an unreasonable force is applied to the horizontal shaft 2, and in particular, the horizontal shaft 2 is forced into a U-shape. If it is engaged with the groove 5, it may be pushed up and come off, which is dangerous. (b) As can be easily understood from FIG. 4, since the operating lever 15 strongly slides against the pillar 4 and damages the paint, the backing plate 17 as shown by the imaginary line
must be attached to the pedestal 4. In addition, a means (not shown) for supporting the weight of the fixing device and the reaction force of the pressing force F must be provided, so machining of the pedestal 4 is required.

The present invention was developed in view of the above circumstances.It is small, lightweight, has a simple structure, is low in cost, can be attached to the upper pillar without machining, and does not apply excessive force to the horizontal axis that supports the sign board. It is an object of the present invention to provide a fixing device for a double-sided rotary sign plate with legs that is free from the risk of causing damage.

In order to achieve the above object, the fixing device of the present invention is a two-sided rotary sign board with legs, in which a sign board clamping tool having a V-shaped groove is fixed to a slider that is slidably fitted on the pillar. , the above-mentioned slider is slid along the pedestal so that the edge of the sign board can be held in the V-shaped groove, and a cut is provided in the part where the slider goes around the pedestal, and the above-mentioned The present invention is characterized in that it is possible to prevent sliding of the slider by providing means for tightening the slider in a direction in which the cuts of the slider are brought into close contact with each other.

Next, an embodiment of the present invention will be described with reference to FIGS. 5 to 8. Fig. 5 is a plan view of the double-sided rotary sign plate with legs of the present invention, Fig. 6 is a front view thereof, Fig. 7 is a sectional view taken along J-J shown in Figs. 5 and 6, and Fig. 8 is FIG.

In the present invention, a sign board holder having a V-shaped groove is fixed to a slider that is slidably fitted onto a pedestal. In this embodiment, a rectangular cylindrical slider 18 that slidably fits into the pedestal 4 and a clamping tool 20 having a V-shaped groove 19 that can clamp the edge of the sign board 1 are made of synthetic resin. It is molded in one piece. It is convenient to use a material that is not so hard compared to the surface of the pillar 4 (or the paint film if it is painted), such as the synthetic resin in this embodiment, since there is no risk of damaging the surface of the pillar 4. be. When implementing the present invention, the V-shaped grooves described above are formed with tapered opposing slopes (19 in Fig. 6).
a, 19b), and the bottom part (19 in the same figure) is sufficient.
c) may be a horizontal surface or may be bottomless. By forming the V-shaped opposing slopes so as to be symmetrical with each other through the vertical sign board 1, the slider 18 can be slid up and down along the pillar 4, as shown in FIG. Thus, the edge of the sign board 1 can be held by the V-shaped groove 19.

A cut 18 is formed along a substantially perpendicular plane in the rectangular cylinder wall portion where the slider 18 surrounds the pillar 4.
Provide a. Then, the slider 1 is moved in a direction that brings the opposing surfaces of the cut 18a closer to each other.
Provide means for tightening 8. In this embodiment, a through hole 18b is provided in the vertical direction on the surface of the cut 18a, through which a hexagonal bolt 21 is inserted and a handle 22 with a female thread is screwed.

In this embodiment, the head 21a of the hexagonal bolt 21 is fitted into a hexagonal recess 18c formed at one end of the through hole 18b to prevent it from rotating.
The width of the portion a is reduced, so that the leg 4 is tightly held in place, and sliding along the leg 4 is restricted.

In this embodiment, as described above, the clamping tool 20 having the V-shaped groove 19 is fixed to the slider 18 which is slidably fitted onto the pillar 4, and the slider 1
8 is a cut 18 in the cylinder wall surrounding the pillar 4.
a, and a hexagonal bolt 21 and a handle 22 with a female thread are provided to tighten the slider 18 in a direction in which both sides of the cut approach each other, so that the slider 18 can be prevented from sliding.

The fixing position of the double-sided rotating indicator plate with legs configured as described above is determined by loosening the female threaded handle 22 and lowering the slider 18. As shown in FIG. 2, it descends and does not interfere with the sign board 1, so the sign board 1 can be freely rotated.

Slider 18 with the above signboard 1 in a vertical position
When the clamping tool 20 fixed thereto is raised to the solid line position, the V-shaped groove 19 clamps the edge of the sign plate 1 and stops its rotation. In this case, since the holding portion is formed in a V-shape, (a) even if the sign board 1 is not in an exactly vertical position, it can be guided into the V-shaped groove.
(b) Since it is held in the V-shaped groove, no inconvenience occurs even if there is some variation in the thickness of the sign board 1 due to manufacturing errors. (c) For the same reason, it is also versatile for sign boards with different thickness dimensions. (d) Since it is held in the V-shaped groove, rotation of the sign board 1 can be stopped without causing play.

In this manner, the sign plate 1 is held between the V-shaped grooves 19 and the threaded handle 22 is tightened to stop the slider 18 from sliding, and this state is maintained.

As is clear from the configuration and operation of the device of the present invention detailed above, the device for fixing sign boards of the present invention is small and lightweight, has a simple structure, and is low in cost. An excellent practical effect can be obtained in that it can be mounted and there is no risk of exerting excessive force on the horizontal shaft supporting the sign board.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the double-sided rotation indicator plate with legs, Figure 2
The figure is a perspective view of an example of a conventional rotary sign plate fixing device for double-sided use with legs, and FIGS. 3 and 4 are vertical sectional views of conventional rotary sign plate fixing devices for double-sided use with legs that are different from the above. . Fig. 5 is a plan view of the fixing device for a double-sided rotating sign plate with legs according to the present invention, Fig. 6 is a front view thereof, Fig. 7 is a sectional view taken along J-J shown in Figs. FIG. 8 is a perspective view that also serves as an explanatory diagram of the operation of the above embodiment. 1... Sign board, 2... Horizontal axis, 3... Legs, 4...
... Pillar, 5 ... U-shaped groove, 6 ... Ratchet pawl, 7 ... Release lever, 8, 8' ... Brake piece, 9 ... Lever, 10 ... Shaft, 11 ... Screw rod, 12...Handle with female thread, 13...Lever, 14...Bracket, 15...Operation lever,
16...Shaft, 17...Packing plate, 18...Slider, 18a...Slit, 18b...Through hole, 18c
...Hexagonal recess, 19...V-shaped groove, 20...
Clamping tool, 21...Hexagonal bolt, 21a...Same bolt head, 22...Handle with female thread.

Claims (1)

[Scope of utility model registration request] In the double-sided rotary sign board with legs, a sign plate holding tool having a V-shaped groove is fixed to a slider that is slidably fitted onto the pillar, and the slider is slid along the pillar. The edge of the sign plate can be held in a V-shaped groove, and a cut is provided in the part where the slider surrounds the pillar, and the slider is moved in a direction to bring the sides on both sides of the cut closer to each other. A fixing device for a double-sided rotary sign plate with legs, characterized in that a tightening means is provided to prevent sliding of the slider.