JPH08281574A - Cylindrical body expansion device - Google Patents

Abstract

PURPOSE: To provide a cylindrical body expansion device of which winding-up can be performed easily and safely, and the repeated life is long. CONSTITUTION: A cylindrical transformation spring 1 to which stable quality is given in the tight spiral condition, is extended and held with a cylindrical part supporting body 2 and a spiral part supporting body 7, and this spiral part supporting body 7 is connected to a rotationally energized spiral spring 8 so as to automatically wind up the spring 1. Hereby, the form can be changed by a little energy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tubular expansion / contraction device used for an antenna, a magic hand, etc.
More specifically, the present invention relates to a tubular expansion / contraction device in which a long tubular spring having a joint is wound in a spiral shape and housed in a case.

[0002]

2. Description of the Related Art Heretofore, as a tubular body expanding / contracting device of this type, US Pat. No. 3,243,132 and US Pat.
As described in Japanese Patent No. 4674, it is known that, in a natural state, a long tubular spring is flatly developed and forcibly wound in a spiral shape to be housed in a case.

[0003]

However, since the above-mentioned conventional tubular body expanding / contracting device has a tubular spring having a strong force to be extended as a constituent element, a large power is required to wind this around the drum. It was necessary and moreover, when it was disengaged or oil adhered, it suddenly elastically restored to a tubular body, which was dangerous and frightening. In addition, there is a drawback in that it is easily damaged during winding deformation and has a short cycle life.

SUMMARY OF THE INVENTION The present invention is intended to solve the above problem and to provide a tubular expansion / contraction device which can be easily retracted by winding, is highly safe, has no fear, and has a long cycle life.

[0005]

In order to achieve the above-mentioned object, the tubular expansion / contraction device according to the present invention has a property of being stable in a tightly wound spiral state, instead of the conventional dangerous long tubular spring. We succeeded in developing the given transformation spring, and by stretching it and holding it by the tubular part support and the spiral part support, we succeeded in easily contracting and having a long life and eliminating the risk of protrusion. Of.

Further, for the same purpose, the rewinding of the transformation spring may be automatically performed by using a rotation biasing spring.

[0007]

In the tubular body expanding / contracting device of the present invention, since the transformation spring having the close contact spiral with the curl is stable in both the spiral state and the tubular state, the flip-flop effect occurs and the shape can be changed with a small amount of energy. Can be changed. In addition, a rotation-biased spring is attached to help this in order to make it easier to pull.

If the rotation biasing spring is provided inside the spiral part support, the spiral spring support can be accommodated easily, and if it is provided outside, the spiral part support can be made compact.

[0009]

Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a tubular body expanding / contracting device for high-altitude work that also serves as a measure. A transformation spring 1 is a spiral portion 1 in close contact with a tubular portion 11.
It consists of 2. This transformation spring 1 is made of a stainless steel strip (thickness 0.065 mm, width 50 mm) as a material, and is first roll-formed into a tubular shape by the forming apparatus 100 of FIG. By squeezing the dorsal side with 400 and finally shaping it with a die 500, it was manufactured to have both the property of being stable in the closely wound spiral state and the property of being stable in the tubular state.

This transformation spring 1 is held by a tubular portion support 2 and a spiral portion support 6 which extend telescopically, and has an outer diameter of the tubular portion of 16 mm and an inner diameter of the spiral portion of 16 mm. It has the ability to be rolled up and shrink. Reference numeral 3 denotes a shape-changing tongue, which is arranged between the tubular portion 11 and the spiral portion 12. The spiral portion support 6 is a storage hole integrally formed inside the body 4, and the spiral portion 12 of the transformation spring 1 is loosely inserted therein.

Reference numeral 5 denotes a tip, which is suitable for hooking an object when it has a hook shape as shown in the drawing. Tubular part 1
A rope 50 is inserted through the inside of 1 and the tubular portion support 2,
The tip of the rope 50 is connected to the tip tool 5. Further, regarding the expansion and contraction movement of the tubular portion 11, the expansion is performed directly by hand, and the compression is performed by pressing the pressure contact brake 51 to release it.

In the tubular body expanding / contracting device having the above-mentioned structure, the tubular transformation spring 1, which has the property of being stable in a closely wound spiral state, is stretched and held by the tubular portion support body 2 and the spiral portion support body 6. Since the rewinding force is strengthened, the rewinding force is pulled out and extended with a finger against the rewinding force, but the return is automatically contracted by the force of the transformation spring itself. The inner surface of the spiral support 6 is smooth and has low friction.

FIG. 2 shows an embodiment of the magic hand of the present invention. Unlike the one described above, the rewinding force of the transformation spring 1 is further enhanced by the rotation urging spring 8, and the tip 5 has It is designed to be able to hold. When grasping an object, the rope 50 is pulled from the hand so that the transformation spring can be remotely operated even when it is long. Further, in FIG. 2, a power shaft 45 that is input by a handle or a motor is provided, and by rotating the spiral portion 12 via a rubber belt 46, it is possible to send out or rewind by winding transmission. Has been done. At this time, since the spiral portion 12 of the transformation spring 1 is in close contact and there is no possibility of spreading, the winding can be performed without any trouble.

FIG. 3 shows another example of the present invention.
It is for raising flags and advertisements. The shape changing tongue 3 is lightly pressed against the spiral portion 12 by a compression spring,
It is designed so that it does not separate even if the winding diameter changes. Further, pinch rollers 31 and 32 are provided (also functioning as a brake), and the handle 33 can be rotated to send out or rewind the transformation spring. At this time, the transformed spring rewound is strongly wound around the spiral part support body 7 by the restoring force of the spring itself and the force of the mainspring 8 and there is no fear of sagging.

FIGS. 4 and 5 show an embodiment in which the rotating biasing spring 8 is provided side by side outside the spiral portion 12 of the transformation spring 1. A power transmission body 70 is connected to the swirl support 7 and a rotation-biasing mainspring 8. In FIG. 4, the mainspring 8 is built in the mainspring case that rotates integrally with the gear 70, but in FIG. 5, the mainspring 8 with reverse winding is wound around the drum that rotates integrally with the chain 70, and as a whole three axes. It has a structure. As the tip 5, an example of a catch structure is shown in FIG. 4, and an example of a marker is shown in FIG.

FIG. 6 shows an embodiment in which two transformation springs 1 are bound together and held on a common tubular portion support 2, and the spiral portion 12 of each transformation spring 1 is provided with a rotation biasing spring. The provision of 8.8 makes it possible to automatically contract. In the present embodiment, a table lamp is shown, and a light bulb is equipped as the tip end tool 5. The cylindrical transformation spring 1 has a cylindrical portion 11 having a shape of
It is desirable to have overlapping seams from the viewpoint of structural strength, but it is not necessarily circular, and it is generally sufficient if they are half circles or more, and it is also possible to tie and use two as in this example. The tubular transformation spring used here is made of SU
S301, thickness 0.065 mm width 40 mm, spiral inner diameter 26 mm, tubular outer diameter 13 mm.

FIG. 7 shows two cylindrical transformation springs 1 having different diameters.
An example of a magic hand type tubular expansion / contraction device in which 1 is coaxially arranged is shown. Unlike the previous embodiment, the two cylindrical transformation springs 1.1 are made thicker on the outside and thinner on the inside.
They are slidable with respect to each other. Two cylindrical transformation springs 1
1 is held by a common tubular portion support 2 and has spiral portions 12 and 12 'which are closely attached to each other, and are sent out from here. To extend it, pull it out by hand and stop it with the brake 51. When the brake is released, it automatically contracts due to the action of the rotating spring 8.8.

As a whole, it is designed like a pistol, and when the trigger 9 is pulled, the bodies 41 and 42 holding the two spiral portions 12 and 12 are separated from each other, and the finger portion 5 of the tip 5 is separated.
1 and 52 can approach each other and grasp an object. Trigger 9
If the finger is returned, the restoring spring 53 separates the fingers 51 and 52 from each other, and the object can be separated. In addition, the rotation bias spring 8
The rotations of the 8 mainspring cases 71 and 72 are synchronized by the rubber belt 10 and the rubber belt 10 is extended when the trigger 9 is pulled.

[0019]

Since the present invention is configured as described above, it has the following effects.

In the tubular body expanding / contracting device of claim 1, the transformation spring 1 is easily rewound, so that the safety is high and the repeated life is long.

In the tubular body expanding / contracting device according to the second aspect, since it is rewound more easily by the rotation biasing spring, it is safer and the returning speed can be increased.

The device of claim 3 fits well, and the device of claim 4
In this case, the spiral support is compact.

According to the fifth aspect, the rope 50 can be remotely operated and energy can be supplied, and the sixth aspect has a high structural strength.

The invention of claim 7 is extremely convenient for giving expansion and contraction power without damaging the transformation spring, and the invention of claim 8 has an advantage that two transformation springs are structurally strong.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a side view showing another embodiment.

FIG. 3 is a side view showing another embodiment.

FIG. 4 is a side view showing another embodiment.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a front view showing another embodiment.

FIG. 7 is a side view showing another embodiment.

FIG. 8 is a side view of a manufacturing apparatus showing a method for manufacturing a transformation spring.

[Explanation of symbols]

 1 ... Transformation spring 11 ... Cylindrical part 12 ... Spiral part 2 ... Cylindrical part support 6.7 ... Swirl part support

Claims (8)

[Claims] 1. A tubular body characterized in that a tubular transformation spring (1) provided with a property of stabilizing in a closely contacted spiral state is stretched and held by a tubular part support body (2) and a spiral part support body. Telescopic device. 2. A cylindrical transformation spring 1 provided with a property of stabilizing in a closely wound spiral state is stretched and held by the cylindrical portion support body 2 and the spiral portion support body, and the spiral portion support body is rotationally biased. A tubular body expansion / contraction device characterized in that it is connected to a mainspring 8 and is automatically wound. 3. The tubular body expanding / contracting device according to claim 2, wherein the rotation biasing spring 8 is provided inside the spiral part support. 4. The tubular body expanding / contracting device according to claim 2, wherein the rotation biasing spring 8 is provided outside the spiral part support. 5. The tubular expansion / contraction device according to claim 1, wherein the tubular portion support member 2 has a tubular shape, and the rope 50 is inserted therethrough. 6. The tubular body expanding / contracting device according to claim 1, 2 or 5, wherein the tubular portion support member 2 has a telescopic shape. 7. The rubber belt 4 is provided on the outer circumference of the spiral portion of the transformation spring 1.
6 is wound around, 1 or 2 characterized by the above-mentioned.
The tubular expansion-contraction device described. 8. The tubular body expanding / contracting device according to claim 1, wherein the two transformation springs 1.1 are held by a common tubular portion support 2.