JPH04916B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Fields> The present invention is applicable to hoisting and unloading of poles for raising flags or carp streamers, netting used for tennis, volleyball, badminton, table tennis, etc., and packing of freight vehicles such as trucks. This invention relates to a winding device used for rope tensioning, etc.

<Conventional technology> Traditionally, when raising or lowering a flag on a flag-raising pole, the flag is raised and lowered by manually pulling a string, rope, etc. to which the flag is connected, and then tying the end of the string or rope to the pole to raise the flag to a certain height. I support it. The same applies to netting for ball games, packing ropes, etc., and by tying the rope or string to another member, a certain tension is applied to the rope or string.

<Problems to be Solved by the Invention> Therefore, in either case, it is necessary to tie the operated member such as a string or rope to another member, and at the same time, it is necessary to untie the operated member during operation. However, the overall operation is cumbersome.

The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a winding device that does not require tying or releasing the operated member.

<Means for Solving the Problems> In order to achieve the above object, the present invention locks the winding drum on which the operated member is wound by the frictional force caused by the enlargement of the coil diameter of the coil spring. It is something. Therefore, the winding device according to the present invention includes a fixed tube fixed to a support member, a coil spring wound to a diameter larger than the inner diameter of the fixed tube and inserted into the fixed tube, and a coil spring wound inside the fixed tube. The winding drum includes an inserted input shaft, a drum part around which the operated member is wound, and a winding drum that is inserted into the coil spring and has a contact part that sandwiches a hook part of the coil spring between the input shaft and the input shaft. It is characterized by becoming.

<Function> With the above configuration, when the input shaft rotates in either the forward or reverse direction, the coil diameter of the coil spring decreases, eliminating frictional force with the fixed tube, making it possible to pull out and wind up operated members such as strings and ropes. will be held. On the other hand, external force from the operated member is transmitted to the coil spring via the contact portion of the winding drum. This transmission causes the coil spring to expand in diameter, creating a frictional force between it and the fixed tube, thereby locking the winding drum from rotating in both forward and reverse directions, thereby locking out and winding the operated member.

<Examples> Examples illustrating the present invention will be specifically described below.

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a right side view thereof, and FIG. 3 is a sectional view taken along the line -- in FIG. A pair of brackets 3 are fixed to a fixed support member 1 such as a pole by bolts 2 or the like. An input shaft 4 rotatably passes through the bracket 3. The input shaft 4 has a handle or a flexible shaft (both not shown) connected to the end thereof, and is rotated by human power, a motor, or the like. Further, a winding drum 5 is rotatably attached to the bracket 3. In the winding drum 5, an operated member such as a string or rope is wound around the outer periphery of the drum portion 5a, and when rotated in one direction, the operated member is pulled out, and when rotated in the opposite direction, the operated member is taken up. It will be done. Furthermore, a fixed tube 6 is fixed between the brackets 3, 3 by welding 7 the outer peripheral surface of one end thereof, and a coil spring 8 is inserted into the fixed tube 6. The coil spring 8 is formed by spirally winding a spring wire having a rectangular cross section, and the coil diameter is slightly larger than the inner diameter of the fixed tube 6. Therefore, when inserted into the fixed tube 6, the coil spring 8 comes into pressure contact with the inner surface of the fixed tube 6, producing a frictional force. The above members are assembled so that the winding drum 5, fixed tube 6, coil spring 8, and input shaft 4 are located inside in this order. Therefore, the input shaft 4 is inserted into the coil spring 8, and a fan-shaped operating piece 4a is integrally formed in this inserted portion as shown in FIG. Further, the winding drum 5 consists of the drum part 5a around which the operated member is wound, and a contact part 5b inserted into the coil spring 8, and the contact part 5b is as shown in FIG. An arc-shaped notch is formed within the coil spring 8. The inner diameter of this contact portion 5b is formed to a diameter into which the input shaft 4 is fitted, and the outer diameter thereof is formed to be the same diameter as the diameter of the operating piece 4a of the input shaft 4.
In the assembled state, a gap is created between both ends of the contact part 5b and the action piece 4a of the input shaft 4, and the hook parts 8a and 8b at both ends of the coil spring 8 are inserted into this gap so as to be sandwiched therebetween. There is. Such insertion is performed in such a way that the coil diameter is reduced by forward and reverse rotation of the input shaft 4, and expanded by forward and reverse rotation of the winding drum.

Next, the operation will be explained. When the input shaft 4 is rotated clockwise via a handle or the like, the action piece 4a comes into contact with one hook portion 8b of the coil spring and presses it in the same direction. By this pressing, the coil diameter of the coil spring 8 is reduced and the state of pressure contact with the fixed tube 6 is released, and the hook portion 8b comes into contact with and presses the contact portion 5b of the winding drum 5.
As a result, the winding drum 5 rotates in the same direction as the coil spring 8, and the operated member is pulled out (or wound up). Next, when the input shaft 4 is rotated counterclockwise, the operating piece 4a comes into contact with the other hook part 8a and presses it, but as a result, the coil diameter of the coil spring 8 is similarly reduced. The winding drum 5 rotates in the direction of winding up (or pulling out) the operating member. On the other hand, when such an operation is stopped, an acting force such as weight is applied to the winding drum 5 from the operated member side. This acting force is applied to rotate the winding drum 5 clockwise or counterclockwise depending on the state of the operated member, but in either direction, the contact portion 5b is applied to either one of the coil springs 8. Press the hook portions 8a and 8b. However, the acting force from the winding drum 5 in any direction expands the coil diameter of the coil spring 8, causing the coil spring 8 to come into pressure contact with the fixed tube 6 and exerting a frictional force, thereby locking the rotation. Therefore, flags, nets, etc. can be held in place without tying the operated member to a pole or the like.

<Effects of the Invention> As described above, the present invention automatically locks and rotates the winding drum by expanding and contracting the diameter of the coil spring, thereby eliminating the work of tying the operated member. This has the effect of improving operability.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a sectional view taken along the line -- in FIG. DESCRIPTION OF SYMBOLS 1... Support member, 4... Input shaft, 5... Winding drum, 5b... Contact part, 6... Fixed tube, 8...
Coil springs, 8a, 8b...hook part.

Claims (1)

[Claims] 1. A fixed tube fixed to a support member, a coil spring wound to a diameter larger than the inner diameter of the fixed tube and inserted into the fixed tube, an input shaft inserted inside the coil spring, and an operated member. a drum part to be wound, and a winding drum having a contact part inserted into the coil spring and sandwiching the hook part of the coil spring between the coil spring and the input shaft, and rotating the input shaft in forward and reverse directions. A winding device characterized in that the diameter of the coil spring is reduced to transmit rotational force to the winding drum, and the diameter of the coil spring is expanded by the force acting on the winding drum to lock the rotation.