JPH0645238Y2 - Wire tensioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a wire tension applying device for applying a constant tension to a wire of a winder of a collision test device.

B. Outline of the Invention The present invention inserts wires into the inside of the upper part of the opposing parts by sandwiching the recessed part where the shaft of the tension pulley goes in and out in the side part of the cover that covers the pair of deflecting wheels and the wire that has been hung around. In addition to fixing the guides to prevent the wires from bending, the rods that prevent the wires from floating up were installed on the curved surface of the cover that faces the peripheral surface of the car and the inside of the upper part of the cover to prevent the wires from coming off the tension pulley. It is a thing.

C. Prior Art In the collision test device, as shown in FIG. 4, the wire 3 of the winding drum 2 rotated by the DC motor 1 via a clutch (not shown) is passed through the tension applying device 4 and the opposite side of the barrier 5. The wire 3 is connected to the vehicle 6 on the side and the winding wheel 6 is run at a predetermined speed to remove the wire 3 and collide with the barrier 5.

As shown in FIG. 5 (a), the tension applying device 4 includes a deflecting wheel 43, 43 on which the wire 3 is wound several times, a tension pulley 44 for applying tension to the wound wire, a cover 7, and a base. 41 and a wire guide (not shown) provided on the entrance / exit side of the base. The cover 7 is divided into a drum side cover 7A and a barrier side cover 7B,
It is made up of recessed portions 71, 71, 72 corresponding to the shaft portions of the deflecting wheels 43, 43 and the shaft portion of the tension pulley 44, and mounting portions 73, 73 to the base 41.

D. Problem to be Solved by the Invention However, when the above tension applying device is used, it is difficult to pull the wire with a constant tension when rewinding the wire,
The wire is loosened in the deflecting wheel due to the imbalance between the inertia of the deflecting wheel and the pulling force of the wire.
As shown in, the wire sometimes comes off the tension pulley portion, and when it comes off, the wire cannot be pulled. Therefore, a human being fixed the detached wire each time.

The present invention has been made in view of the above problems of the related art, and an object of the present invention is to provide a wire tension applying device capable of preventing the wire from coming off the tension pulley when the wire is loosened. To provide.

E. Means for Solving the Problem In order to achieve the above object, the wire tensioning device in the present invention is one in which a tension pulley is used to apply tension to a wire wound between a pair of deflecting wheels. , While fixing a guide for preventing the wire from coming off inside the upper part of the opposing part that sandwiches the recessed part where the shaft of the tension pulley goes in and out in the side part of the cover that covers the pair of deflecting wheels and the wrapped wire, The curved surface of the cover, which faces the peripheral surface of the vehicle, and the inside of the upper part of the cover are provided with rods for preventing the wire from floating.

F. Action When the tension applied to the wire wound around the pair of deflecting wheels changes, the wire loosens and rises, and the tension pulley or the deflecting wheel is likely to come off, but the rod provided around the cover prevents the floating. Further, since the guide provided on the cover is located on the side surface of the portion where the wire of the tension pulley and the deflecting wheel easily comes off and narrows the gap between the tension pulley and the deflecting wheel, the wire is prevented from coming off.

Further, since the rod is used to prevent the lifting, even if the wire comes into contact during winding, the wire is smoothly wound.

G. Embodiment An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows the arrangement of the guides and rods in the case, FIG. 2 shows the structure inside the guides, and FIG. 3 shows the positional relationship of the guides with respect to the deflector wheel and the wire. The same components as those shown in FIG. 4 of the related art are designated by the same reference numerals and their duplicate description will be omitted.

In FIGS. 1 to 3, inside the upper part of the portion where the winding drum side cover 7A and the barrier side cover 7B where the wire 3 easily separates are opposed, each is a substantially triangular flat plate-shaped guide 81.
~ 84 is provided to reduce the gap between the covers 7A, 7B and the tension pulleys and the deflecting wheels in this part.

The upper ends of the guides 81 to 84 on the opposite side of the cover from the recess 72 are lowered to provide a step portion a. In addition, guides 85 and 86 that project to the upper end portions of the deflecting wheels 43 and 43 are provided inside the upper portions of the guides 81 and 84 that face the most easily disengaged 3 ₁ , 3 ₃ portions of the wound wire 3. Be sure to put it all together and put the outer wire back in place.

In addition, the step a portion of the guides of the covers 7A and 7B and the curved surface portions c and c
Each of them has rods 87, 87 ... so that the wire that is about to rise can be held down. Each guide 81-86 and rod
87, 87 ... are firmly attached to the covers 7A, 7B using bolts or the like.

H. Effect of the Invention Since the present invention is configured as described above, it has the following effects.

When the tension of winding or pulling back the wire changes, it is possible to prevent the wire from coming off the deflector wheel and the tension pulley when the slack that occurs in the wire wound between the deflector wheels cannot be completely corrected by the tension pulley. . Therefore, it is not necessary to return the wire detached from the deflecting wheel or the tension pulley.

Since the rod is used to prevent the wire from floating, even if the wire comes into contact with it, the frictional resistance is small and the wire can be wound smoothly.

Since the guide and rod are simply attached to the cover, the structure is simple and the cost can be reduced.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a perspective view showing the arrangement and configuration of guides and rollers,
2 is a view taken in the direction of arrow A in FIG. 1, FIG. 3 is a plan view showing the arrangement of wires and guides, and FIG. 4 is a configuration diagram of a collision test apparatus,
FIG. 5 (a) is a side view showing the configuration of a conventional tension applying device,
FIG. 5 (b) is a side view showing the detached state of the wire. 2 ... Winding drum, 3 ... Wire, 4 ... Tensioning device, 7 ... Cover, 43 ... Baffle wheel, 44 ... Tension pulley, 81-86 ... Guide, 87 ... Rod.

Claims (1)

[Scope of utility model registration request] 1. A tension pulley for tensioning a wire wound between a pair of deflecting wheels by a tension pulley, wherein a shaft of the tension pulley at a side surface of a cover covering the pair of deflecting wheels and the wound wire. The guides that prevent the wires from coming off are fixed to the inside of the upper part of the facing parts by sandwiching the recessed part where the wires go in and out, and the curved part facing the peripheral surface of the deflecting car of the cover and the inside of the upper part of the cover respectively. A wire tension applying device, characterized in that a rod for preventing lifting is provided.