JP2002178403A - Heating contracting apparatus for heat shrinkage tube - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating contracting apparatus for a heat shrinkage tube capable of uniformly contracting without using fire and of labor-saving. SOLUTION: The heating contracting apparatus for the heat shrinkage tube comprises a panel heater 3 having a width W longer than at least a length L of the shrinkage tube 2 and a length capable of packing and covering the tube 2 with a suitable excess length, a clamping fitment 4 provided at one end of the heater 3 in its length direction to clamp the one end of the heater 3 in its length direction at a pipe 1 to be mounted with the tube 2, and a stretcher 5 provided at the other end to stretch the heater 3. Thus, the heater 3 is moved in a state in which the heater 3 is always contacted with the surface of the tube 2 and can closely mount the tube 2 on the pipe 1 while uniformly heating and contracting the surface of the tube 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-shrinking apparatus for a heat-shrinkable tube used for repairing a damaged portion of a pipe such as a gas pipe, a water pipe, a sewage pipe, covering a connecting portion or preventing corrosion. Things.

[0002]

2. Description of the Related Art Conventionally, a heat-shrinkable tube set in a damaged portion or a connecting portion of the above-mentioned tube body is heated and shrunk by a heat source such as a gas burner. . Not applicable in workplaces where the use of fire is prohibited. In this case, a heat source such as a dryer is used. With a large diameter pipe, shrinkage unevenness is likely to occur, so that shrinking work requires skill. Since the burner must always be moved back and forth, up and down and left and right with great care so as not to burn the heat shrink tube, mental stress accumulates and continuous work is difficult. At least one skilled worker must stick to one place and take measures, so that labor saving cannot be achieved.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the problems described in the prior art.
It is an object of the present invention to provide a heat-shrinkable tube for heat-shrinkable tubes that can be uniformly shrunk without using fire and that can save labor.

[0004]

SUMMARY OF THE INVENTION A heat shrink tube according to the present invention is provided.
The heat shrinking device for a tube has a width at least longer than the length of the heat shrinkable tube, and has an appropriate extra length to cover the heat shrinkable tube. At one end in the direction, a fixture for fixing the end to the tube to which the heat shrink tube is attached is provided, and at the other end, an extender for extending the sheet heater is provided. It is characterized by being equipped.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. The present invention is an apparatus for heat-shrinking a heat-shrinkable tube 2 set at a damaged portion of a pipe 1 such as a gas pipe, a water pipe, a sewage pipe or the like or at a connection portion or a part of a main body. As shown in FIG. 3, it has a width W longer than at least the length L of the heat-shrinkable tube 1, and has an appropriate extra length A
As shown in FIG. 2, a fixing member 4 for fixing the end to the tube 1 at one end in the longitudinal direction of the sheet heater 3 having a length capable of covering the heat shrinkable tube 1. Equipped.

[0006] For example, as shown in FIG. 4 (a), the fixture 4 is a support member 6 made of metal or heat-resistant plastic.
At both end portions or the entire surface (not shown) of contacting the tubular body 1 of
A fixing member 7 made of a magnet, an adhesive, an adhesive, a suction cup, or the like is attached, and one end in the longitudinal direction of the sheet heater 3 is fixed to the lower surface of the support member 6, or the sheet heater 3 Long in length,
In a structure in which a plurality of sheet heaters 3 are joined by fasteners 8, a joining member 9 made of canvas or the like to which the fasteners 8 are attached is fixed at the tip. In addition, 1
Reference numeral 0 denotes a separator made of a rubber plate or the like for preventing the planar heaters 3 from overlapping each other in the excess length A portion.

In the fixture 4 shown in FIG. 4 (b), a hook member 11 which is curved so as to be hooked and fixed to the tube 1 is attached to the support member 6.

As shown in FIG. 2, an extension 5 for extending the sheet heater 3 is provided at the other end of the sheet heater 3.

As shown in FIG. 5 (a), for example, the stretching tool 5 has a weight 12 attached to the free end side of the sheet heater 3 with a string or a chain. When the sheet heater 3 is connected to the power source S in the state shown in FIG. 2 and the sheet heater 3 is heated, the heat causes the heat-shrinkable tube 2 to shrink. Since the heater 3 is also pulled and contracted by the weight 12 of the extension device 5, the sheet heater 3 always keeps a close contact with the surface of the heat-shrinkable tube 2.

Further, as shown in FIG. 5B, for example, a spring 13 is attached to the free end of the sheet heater 3.
Is fixed to the structure 14 or the like at one end, and the sheet heater 3 is constantly given an extension force. As an emergency measure, the worker may pull the free end side of the sheet heater 3.

The sheet heater 3 is not specially designed, but a commercially available one can be used. When the outer diameter of the tube 1 increases, the length of the sheet heater 3 increases,
Due to problems in handling and storage, as shown in FIG. 3, it is divided into several sections and joined by fasteners-8.

In operation, as shown in FIG. 1, a heat-shrinkable tube 2 is set at a predetermined position of a tubular body 1, and then, as shown in FIG. At 4, the tube is fixed to the tube 1, and then closely contacted with the outer surface of the heat-shrinkable tube 2, covered, and connected to the power source S with the other end extended by the extension device 5. At this time, although illustration is omitted, it is preferable to cover the sheet heater 3 with a blanket or the like because heat can be prevented from escaping.

Then, the heat-shrinkable tube 2 becomes a sheet heater 3.
The heat is shrunk by the heat, and accordingly the sheet heater 3 is pulled by the stretching tool 5 and always moves in close contact with the surface of the heat shrink tube 2 to heat and shrink the heat shrink tube 2 uniformly. Then, the heat-shrinkable tube 2 is mounted on the tube 1 closely.

[0014]

As described above, the present invention has the following advantages. Since fire is not used, it can be applied to work sites where fire is strictly prohibited. Since no skill is required, even beginners can easily contract. Since the sheet heater is always in close contact with the surface of the heat-shrinkable tube, the heat-shrinkable tube can be uniformly shrunk without unevenness. By simply mounting the device of the present invention and turning on the sheet heater, the contraction can be automatically and automatically performed thereafter, thereby saving labor. Since a plurality of processing locations on the same work site can be processed in parallel, work efficiency is improved. Since the long sheet heater is divided into several sections and joined by fasteners, transportation, handling, storage and the like are easy. Since the structure is simple, mass production can be performed at low cost. Since the thickness of the sheet heater is small, it can be used in a place where pipes are provided in parallel.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing a state in which a heat-shrinkable tube before shrinkage is set in a tubular body.

FIG. 2 is a schematic perspective view showing a state in which a sheet heater is wrapped around a heat-shrinkable tube in FIG.

FIG. 3 is a plan view showing an example of a sheet heater on which a fixing device and an extension device are mounted.

FIG. 4 is a schematic perspective view showing an example of a fixture.

FIG. 5 is a schematic perspective view showing an example of a stretching tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tube 2 Heat shrink tube 3 Planar heater 4 Fixer 5 Extender 6 Fixing member 7 Supporting member 8 Fastener 9 Joining member 10 Separator 11 Hook member 12 Weight 13 Spring 14 Structure L Heat Length of contraction tube W Width of sheet heater A Extra length S Power supply

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B29L 23:00 B29L 23:00 (72) Inventor Hiroyuki Ando 2899 No. 2 Oda, Ohara City, Oita Pref. In-house (72) Inventor Shinnosuke Muratani 2899 Ohara, Oita City, Oita Prefecture West Japan Electric Wire Co., Ltd.F-term (reference) AG08 RA01 RC02 RG01 RG07

Claims (1)

[Claims] An apparatus for heat-shrinking a heat-shrinkable tube (2) set at a damaged portion, a connecting portion, or a part of a main body of a tube (1), wherein at least the heat-shrinkable tube (1) is provided. A) a sheet heater (3) having a width (W) longer than the length (L) and having a surplus length (A) and a length capable of covering the heat shrinkable tube (1). At one end in the longitudinal direction, a fixture (4) for fixing the end to the tube (1) is provided, and at the other end, an extension for extending the planar heater (3). Shrinking device for a heat shrink tube characterized by being equipped with a tool (5)