JPS6116838Y2 - - 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 its operating condition.

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.
The leg 3 is supported by the left and right pillars 4 so that it can be fixed and freely rotated around the horizontal axis of rotation A-B. In this case, a U-shaped groove 5 is formed in the upper end of the pillar 4 and the horizontal shaft 2 is engaged with it.

The above-mentioned sign board 1 is usually formed in a rectangular shape, and a blackboard, a white board, a display board, etc. are arranged on both sides of the sign board 1.

The double-sided rotating sign board with legs described above 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 in the figure. 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 to pass through the lever 9 and the pillar 4, and a handle 12 with a female thread 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. Therefore, a pair of fixing devices of this type shown in FIG. 3 must be provided symmetrically. Providing one pair not only doubles the installation cost but also doubles the number of operations. (b) Third
As can be easily understood from the figure, in order to mount the fixing device of this type in FIG.

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 is shown) are fixed to the other side. 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 reaction force of the pressing force F by the weight of the fixing device 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, in a double-sided rotary sign board with legs, is provided with a cylindrical slider that is slidably fitted on the pillar, along a plane parallel to the axis of the slider. A slit is provided, and a means is provided for tightening the slider in a direction in which both sides of the slit approach each other, and a pair of sign plate holding pieces are fixed to the slider so as to face each other through the slit. The present invention is characterized in that the slider is tightened in a direction in which both sides of the cut are brought closer to each other, so that the slider can clamp the pedestal and at the same time the sign plate can be clamped by the sign plate holding piece.

Next, an embodiment of the present invention will be described with reference to FIGS. 5 to 9. FIG. 5 is an exploded plan view of the fixing device for a double-sided rotating sign board with legs according to the present invention, FIG. 6 is an exploded front view of the same, and FIG. 7 is a sectional view taken along the J-J plane shown in FIG. 6. . Figures 8 and 9 are perspective views depicting the device of the embodiment shown in the above figure attached to a double-sided rotary sign plate with legs, and Figure 8 shows a state in which the sign plate is released and Figure 9 shows a state in which the sign plate is clamped to prevent its rotation.

Reference numeral 4 shown by imaginary lines in FIG. 5 is a pillar. A cylindrical slider 18 is slidably fitted onto the above-mentioned pillar 4. In this embodiment, the slider 18 is made of synthetic resin and is formed into a rectangular tube shape. When implementing the present invention, the material of the slider can be selected arbitrarily, but a material having appropriate elasticity is used. Note that it is advantageous to use a material that is less hard than the surface of the pedestal (or the paint film if it is painted) because there is no risk of damaging the surface of the pedestal due to sliding. Furthermore, when implementing the present invention, the shape of the slider is not limited to a rectangular cylindrical shape, but may be any cylindrical shape that can be fitted onto the pillar 4.

A cut 19 is provided approximately along a plane parallel to the axis of the pillar 4 so that the cylindrical slider 18 can split the pillar 4. In this embodiment, the above-mentioned cut 19 is connected to the central axis of the cylindrical slider (not shown).
This cut 19 is provided along the plane passing through the
Even if it is slightly tilted or formed into an irregular shape, the effects described below can be obtained. In short, this cut 19 may have any shape as long as it can clamp the pedestal 4 by tightening the slider 18.

The present invention provides a means for tightening the slider in the direction of narrowing the width of the cut by bringing both sides of the cut closer together. In this embodiment, a through hole 20 is provided perpendicular to the cut 19, and a hexagonal bolt 21 is inserted therethrough, and a handle 22 with a female thread is screwed and tightened. Reference numeral 23 denotes a rotation-preventing recess that engages with the head of the hexagonal bolt 21. The slider 18 of this embodiment has recesses 23 and 23' for preventing rotation at both ends of the through hole 20, respectively, for convenience of use and compatibility of parts, and one recess 23 is provided with a hexagon bolt. Fit the head of 21,
The structure is such that the other recess 23' is left open. As a result, as can be easily understood from FIG. 5, when the female threaded handle 22 is turned and tightened with one hand, the slider 18 can clamp the column 4 and stop the sliding of both members, and the hexagonal bolt 21
It can also be used in the same way as above by reversing the direction of insertion and assembling it oppositely.

A pair of clamping pieces 24, 2 for clamping the sign board
4 are opposed to each other with the cut 19 interposed therebetween, and are fixed to the slider 18, respectively. In this embodiment, the pair of clamping pieces 24 and 25 are integrally molded with the slider 18 from synthetic resin.

The phantom line 1 in FIG. 6 represents a sign plate fitted between the pair of clamping pieces 24, 25. The basic shape of the pair of clamping pieces 24 and 25 is that the surfaces facing each other are parallel to each other, but if they are widened in the vicinity of their upper ends in a tapered shape as in this embodiment, it can be used as a sign. 1 is easy to fit. In addition, the bottom end of the groove 2 is made to protrude inward.
4a and 25a are conveniently formed so that they can be automatically positioned when fitting the sign plate 1 together.

In FIGS. 5 and 6, the slider 18 is not tightened by the hexagonal bolt 21 and the female threaded handle 22, so the slider 18 slightly cuts the cut 19 (in this embodiment) by its own elasticity. Approximately 2mm) open. In this state, the gap t between the inner circumference of the opposing surface of the slider 18 and the outer circumferential surface of the pedestal 4 is such that the slider 18 can slide smoothly along the pedestal 4 (for example, about 0.1 mm). Figure 5. Setting. Then, as shown in FIG. 6, the gap between the sign plate 1 and the clamping pieces 24, 25 is set to be the same size as the above-mentioned gap t. However, FIGS. 5 and 6 depict a state in which the gap t is distributed by t/2 on both the left and right sides.

Slider 18 of the fixing device configured as above
When the handle 18 with female thread is loosened and the slider 18 is slid downward as shown in FIG. 8, the pair of clamping pieces 24 and 25 separate from the sign plate 1 and interfere with each other. In this state, the sign board 1 can be freely rotated in the direction of the reciprocating arrow KL and turned over.

When the front and back sides of the sign board 1 are aligned vertically in the desired direction, and the slider 18 is slid upward to fit the sign board 1 between the pair of clamping pieces 24 and 25 as shown in FIG. 9, the sign is displayed. Rotation of the plate 1 is locked. In this state, when the female threaded handle 22 is tightened and the slider 18 is tightened in a direction to narrow the crack 19, the inner surface of the slider 18 clamps the pedestal 4 and stops sliding, and the clamping pieces 24 and 25 are The edge of a plate 1 is clamped and its rotation is fixed without causing play.

As is clear from the structure and operation of the device of the present invention detailed above, the sign plate fixing device of the present invention is small and lightweight, has a simple structure, and is low in cost.
Can be installed without machining the pedestal,
An excellent practical effect can be obtained in that there is no risk of applying excessive force to 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 an exploded plan view of the fixing device for a double-sided rotating sign plate with legs according to the present invention, Fig. 6 is an exploded front view thereof, Fig. 7 is a sectional view taken along J-J shown in Fig. 6, and Fig. 8 and FIG. 9 is a perspective view that also serves as an explanatory view 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...Backing plate, 18...Slider, 19...Slit, 20...Through hole, 21...Hex bolt, 22...Handle with female thread, 23...
Recess, 24, 25... clamping piece.

Claims (1)

[Scope of utility model registration request] In a double-sided rotary sign board with legs, a slit is provided in a cylindrical slider that is slidably fitted onto a pedestal column, approximately along a plane parallel to the axis of the cylindrical slider, and both sides of the slit are brought closer to each other. A means for tightening the slider in a direction is provided, and a pair of sign plate holding pieces are fixed to the slider by facing each other through the cut, and the slider is tightened in a direction in which both sides of the cut are brought closer together. 1. A fixing device for a double-sided rotary sign board with legs, characterized in that a slider is used to clamp the pedestal and a sign plate clamping piece is used to clamp the sign board.