JPS6228407Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for heating a heat-shrinkable sleeve in order to cover a connection part of a communication cable and various other objects with the heat-shrinkable sleeve.

Gas burners are commonly used to heat the heat shrinkable sleeve. When heat-shrinking a heat-shrinkable sleeve, if the entire sleeve is heated at once, air will remain inside the sleeve and the sleeve will not come into close contact with the object. The material is heated and contracted sequentially from the middle (FIG. 1B) toward both ends or from one end to the other to gradually push out air and bring it into close contact with the object 2. However, it requires a high degree of skill to move the gas burner along the heat-shrinkable sleeve while heating it uniformly, and if the flame of the gas burner is applied directly to the surface of the heat-shrinkable sleeve, it will locally become overheated and the surface will be heated. It deteriorated, and there was a risk of oxygen deficiency in confined environments such as manholes.

The purpose of the present invention is to provide a heat-shrinkable sleeve heating device that can uniformly and appropriately heat and shrink a heat-shrinkable sleeve without requiring any skill, and that can be operated safely. It is in.

Embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 2 and 3 show a heat-shrinkable sleeve heating device 10 according to the present invention, which includes a base 12
A holder 16 is attached to the base 12 by legs 14 and holds an object 2 to be covered with a heat-shrinkable sleeve, and a cylindrical heating element 20 is attached to the base 12 by legs 18. ing.

In the illustrated embodiment, the holder 16 consists of a clamp that grips the object 2, but it may be replaced by a receiving member that simply receives the object 2. A holding member 24 for holding the heat-shrinkable sleeve 1 concentrically with the object 2 is attached to the cylindrical heating body 20, as shown in FIGS. 2 and 3.

As shown in FIG. 2, the cylindrical heating body 20 includes a radiant tube 26 surrounding the entire length of the heat-shrinkable sleeve 1, a heating wire 28 provided on the outer periphery of the radiant tube, and a heating wire 28. It includes a reflective tube 30 provided on the outside so as to be sandwiched therebetween, and a heat insulating material 32 provided further on the outside. Note that the reference numeral 34 is a case of the heating body 20. The inner surface of the radiant tube 26 is black-treated or roughened to radiate far-infrared rays with good thermal efficiency, and the heating wire 28 is an inorganic insulated wire with a metal sheath. In order to increase the degree of adhesion, a stud 36 is installed on the outer surface of the radiator tube 26 and is passed through the reflector tube 30, and a nut 38 is screwed into the threaded portion of the stud on the outside thereof. In addition, when the object 2 is a long object, the cylindrical heating element 20 is composed of two halves 20A and 20B as shown in FIG. 3, and can be opened and closed by a hinge 40. a flange 20a, the free end of which can be connected by a thumbscrew 42;
20b.

As shown in FIG. 4, the heating wire 28 consists of a plurality of heating wire portions 28a, 28b, and 28c, which are divided in the axial direction of the heat-shrinkable sleeve 1 and each energized independently. It's on.

The above device has heating wire portions 28a, 28b, 2
8c is sequentially energized to thermally shrink the sleeve 1 from the state shown in FIG. 1A to the state shown in FIG. 1B, C, and D in the order. In this way, the air inside the sleeve 1 is pushed out without remaining inside the sleeve. The outer diameter is 130mm, the length is 930mm, and the length is 1mm thick to shrink the polyethylene heat-shrinkable sleeve.
1000mm, inner diameter 150mm, outer diameter 250mm, heating wire 28 is 5
A device consisting of two heating wire sections (400 W each) was used. In this case, first energize the central heating wire for 4 minutes, then energize the heating wires on both sides for 3 minutes.
energize the parts, and finally connect the heating wires on both sides for 3
The power was turned on. The sleeve 1 heat-shrinked in this way was tightly attached to an object without any air remaining inside and without causing thermal deterioration.

According to the present invention, as described above, the heat-shrinkable sleeve can be heated and shrunk in close contact by switching the energization of the plurality of heating wire parts, but in particular, far-infrared radiation is used as the heating means. Since it uses a radiant cylinder with a surface-treated inner surface and an inorganic insulated wire with a metal sheath, it can be heated efficiently at a low temperature, so you can work safely without damaging the sleeve. There are practical benefits that can be achieved.

[Brief explanation of the drawing]

Figures 1A to 3D are explanatory diagrams showing the order of heat-shrinking a heat-shrinkable sleeve on an object, Figures 2 and 3
The figures are a longitudinal sectional view and a side view of the device of the present invention, respectively, and FIG. 4 is a diagram showing the arrangement of heating wires. 1... Heat-shrinkable sleeve, 2... Object, 10...
...Heat-shrinkable sleeve heating device, 16...Holder, 20...Cylindrical heating body, 20A, 20B...
Two half-split parts, 26... radiant tube, 28... heating wire, 28a, 28b, 28c... heating wire portion,
40...Hinge.

Claims (1)

[Scope of utility model registration request] a holder that holds an object that is surrounded by a heat-shrinkable sleeve and is to be covered with the heat-shrinkable sleeve by heat-shrinking the heat-shrinkable sleeve; and a radiant tube that entirely surrounds the heat-shrinkable sleeve. and a cylindrical heating body held coaxially with respect to the heat-shrinkable sleeve, including a heating wire provided on the outer periphery of the radiant tube, the heating wire extending along the axial direction of the heat-shrinkable sleeve. In a heat-shrinkable sleeve heating device that is made up of a plurality of divided heating wire sections that are individually energized, the radiation tube has an inner surface that has been surface-treated to radiate far-infrared rays, and the A heat-shrinkable sleeve heating device characterized in that the heating wire is an inorganic insulated wire with a metal sheath.