JP2544579Y2 - Film coating equipment for structures - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for welding a coating film for a structure, and more particularly to an apparatus for fusing a coating film formed on an outer peripheral surface of a structural member by heating and melting the structural member.

[0002]

2. Description of the Related Art In recent years, with the use of synthetic resin materials in a wide range of fields, various coating techniques for synthetic resin materials have been developed. For example, a cable supporting a bridge girder of a cable-stayed bridge has a coating portion made of high-density polyethylene for weather resistance and rust prevention. The coating was not applied to the cable coating, but a primer was developed to increase the adhesion of the high-density polyethylene coating.After applying the primer to the coating, the primer coating was thermocompressed. The application of primer and top coat has become possible.

As a thermocompression bonding apparatus for thermocompression bonding the above-mentioned primer coating film to a covering portion of a cable, for example, Japanese Utility Model Laid-Open No. 2-125
Japanese Patent No. 782 discloses a thermocompression tube provided on both sides of a cable so as to be capable of being divided into two parts and disposed so as to surround a predetermined length of the cable. Forming a hollow portion and housing a sheathed heater, providing a guide support mechanism movably supporting the thermocompression tubing along the cable, and moving the thermocompression tubing along the cable by the predetermined length via the guide support mechanism. A thermocompression bonding apparatus provided with a feed drive mechanism for intermittently feeding is described.

In the thermocompression bonding apparatus, pressurized air is first supplied to the hollow portion to expand the thermocompression bonding tube inward while heating the vicinity of the inner peripheral surface of the thermocompression bonding tube with a sheath heater. The inner peripheral surface of the thermocompression-bonded tube is pressed against the primer coating film, and the primer coating film is thermocompression-bonded to the covering part of the cable. Separated from the membrane, and then the thermocompression bonding tube is driven by the feed drive mechanism along the cable through the guide support mechanism for a predetermined length, and the above operation is repeated to sequentially coat the primer coating by the predetermined length on the cable. It is configured to be thermocompression-bonded to the covering part.

[0005]

The thermocompression bonding apparatus described in the above publication requires a pressurized air supply device for expanding the thermocompression bonding tube, which increases the manufacturing cost and increases the size of the entire apparatus. The work efficiency is low because the primer coatings are successively thermocompression-bonded by a predetermined length, the durability of thermocompression tubing, which expands and contracts repeatedly while heating, is extremely low, and the heat transfer to the center of the cable And low thermal efficiency.

SUMMARY OF THE INVENTION An object of the present invention is to provide a coating film welding apparatus for a structure which has a simple structure and high working efficiency.

[0007]

According to a first aspect of the present invention, there is provided a coating film welding apparatus for a structure, which heats and melts a coating film formed on an outer peripheral surface of an inclined or horizontal cylindrical structural member of the structure. Coating device for a structure to be welded to the outer peripheral surface of a structural member, comprising a plurality of heater elements for irradiating far infrared rays toward the coating film, and configured to be splittable on both sides of the structural member. A heating means arranged in a state surrounding the predetermined length portion of the structural member in a non-contact manner, and the heating means is movable along the structural member while holding the heating means so as not to contact the coating film. Guide support means for supporting the structural member,
Transfer means for moving the heating means along the structural member via the guide and support means.

[0008]

According to the coating film welding apparatus for a structure according to the first aspect, since the heating means is configured to be splittable on both sides of the structural member, it can be applied to a long structural member such as a bridge cable. Further, the heating means can be easily arranged in a state of surrounding the predetermined length portion of the structural member in a non-contact manner. Irradiating far-infrared rays from the plurality of heater elements provided on the heating means toward the coating film formed on the outer peripheral surface of the structural member, and without contacting the heating means with the coating film, the surface layer of the coating film and the structural member is exposed. Since the coating film can be welded to the outer peripheral surface of the structural member by heating and melting, the structure of the coating film welding apparatus can be greatly simplified without the need for a means for pressing the heating means against the coating film. Thermal efficiency can be greatly improved.

While the heating means is movably supported by the structural member so as not to come into contact with the coating film by the guide support means, the heating means can be moved and driven along the structural member via the guide support means by the transfer means. While moving the means continuously along the structural member at a predetermined speed, the coating film and the surface layer of the structural member can be heated and melted with far infrared rays to be welded to the outer peripheral surface of the structural member, thereby improving the work efficiency of the welding work. It can be greatly improved.

[0010]

According to the coating film welding apparatus for a structure according to the first aspect of the present invention, as described in the operation section, it can be easily applied to a long structural member such as a bridge cable.
The structure of the whole equipment can be greatly simplified, the thermal efficiency for heating can be greatly improved by heating the coating and the surface layer of the structural member using far-infrared rays. Can be greatly improved.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, when the outer peripheral surfaces of a plurality of cable bodies 3 stretched from the tower 1 of the cable-stayed bridge B shown in FIG. This is a case where the present invention is applied to a primer welding device that heats and melts a previously applied primer to fuse it.

First, the cable main body 3 will be briefly described. As shown in FIG. 7, the cable main body 3 is formed by bundling dozens of cable wires 4 and forming a covering portion 5 covering the outer periphery thereof. In addition, the covering portion 5 is formed of a high-density polyethylene tubular body in order to enhance the weather resistance and rust prevention of the cable body 3. This covering part 5 is formed seamlessly and integrally in a cable manufacturing stage. Bridge B
The cable body 3 having a maximum diameter of about 20 cm is extended from the plurality of cable bodies 3, and the longest cable body 3 reaches about 200 m and is stretched on the bridge girder 2 from a position at a height of about 100 m of the tower 3. .

Next, the steps of a coating operation for coating the outer peripheral surface of the cable body 3 will be briefly described with reference to FIG. First, in the cleaning step, the outer peripheral surface of the cable body 3 is cleaned to remove extraneous matter and the like, and then, in the primer step, a primer is applied to the outer peripheral surface as an undercoat. Since the covering portion 5 made of high-density polyethylene is inferior in adhesion to the paint, a hot-melt primer is used. After the primer is applied, the primer is dried in a drying step, and the primer applied in the next welding step is heated and melted and welded to the coating portion 5, and then, in the top coating step, the outer peripheral surface of the cable body 3 is colored with weather resistance. Apply paint for

In the painting operation, the primer welding apparatus of the present embodiment is used in the welding step. The primer welding device includes a welding unit H that is movably mounted on the cable body 3, a power supply unit E that supplies power to the welding unit H, and a transfer device M that moves the welding unit H along the cable body 3. And The transfer device M is for moving and driving the welding unit H disposed on the cable main body 3 along the cable main body 3, and as shown in FIGS. And a bracket 10 is attached to the tower body 1 at the end of the cable body 3 on the tower body 1 side, and a pulley 11 is rotatable on the bracket 10. A bracket 12 is attached to the tower 1 near the bridge girder 2, and a pulley 13 is rotatably provided on the bracket 12.

A rope 14 is wound around the winding machine 8,
The rope 14 extends below the cable main body 3 via pulleys 11 and 13, and its end is connected to the front end of the welding unit H via a bracket 15.
When the rope 14 is wound by the winder 8, the rope 14 moves upward to the tower 1 side along the cable body 3, and when the rope 14 is fed from the winder 8, the rope 14 moves downward to the bridge girder 2 by its own weight. . The operation of the winding machine 8 is controlled by a control device (not shown).

The power supply unit E is for feeding out the power cable 16 following the movement of the welding unit H, and a manual hoisting machine 17 is mounted on the bridge girder 2 at the lower end of the cable body 3. A power cable 16 for supplying electric power or the like to the welding unit H is wound on the hoisting machine 17, and the power cable 16 is connected to the cable via a plurality of hanging tools 16 a attached to the cable body 3. Supported by the body,
The distal end of the power cable 16 is connected to a control panel 7 (see FIG. 3) provided at the rear of the welding unit H. still,
The power cable 16 includes a plurality of power supply lines and a plurality of control lines from a control device.

Next, the welding unit H will be described with reference to FIGS.
This will be described with reference to FIG. The welding unit H includes:
A heating unit 19 having a plurality of heater elements 18 capable of irradiating far-infrared rays to the primer applied to the outer peripheral surface of the cable body 3; a cooling device for cooling the welded primer; a heating unit 19; A guide support mechanism for movably supporting the device on the cable body 3.

The guide and support mechanism will be described. As shown in FIGS. 3 and 4, a frame 21 that can be divided into two parts vertically around a mating surface including the axis of the cable body 3 surrounds the cable body 3. The upper frame 22 and the lower frame 23 of the frame 21 are fastened with bolts (not shown), and a housing portion 24 through which the cable main body 3 is inserted is formed in the frame 21, and the housing portion 24 is a partition wall. 2
5 divides the heating chamber 26 into which the heating unit 19 can be accommodated and the cooling chamber 27 near the rear end. A support frame 28 extending rearward along the lower side of the cable body 3 is integrally provided at a rear portion of the lower frame 23, and a pair of front and rear guide mechanisms 29 are provided on the support frame 28. It is movably supported along the cable body 3 via a pair of front and rear guide mechanisms 29.

The respective guide mechanisms 29 will be described. As shown in FIG. 5, four guide rollers 30 rotatable while holding the outer peripheral portion of the cable body 3 from four directions.
31 is provided, and the upper pair of guide rollers 30 is connected to a retracted position shown by a virtual line through which the cable body 3 can be taken in from above through a swing arm 32 provided on the upper part of the support frame 28; In cooperation with the lower pair of guide rollers 31, the cable body 3 is swingably supported by a solid line capable of holding the cable main body 3 at the use position shown in the drawing, and the lower pair of guide rollers 31 is supported by the support bracket 33 and the adjustment member. Supported by the arm 34 so as to be able to swing in the radial direction of the cable body 3,
As shown in FIG. 6, the end of the adjusting arm 34 is engaged with a predetermined engaging hole 33 a of the support bracket 33 so that the height can be adjusted according to the diameter of the cable body 3.

The heating unit 19 includes the cable body 3
3 for heating and melting the primer applied to the outer peripheral surface of the cable body 3 in a non-contact manner. As shown in FIGS. A substantially cylindrical holder member 35 which can be divided into two vertically
The holder member 35 is disposed so as to surround a predetermined length of the cable main body 3, and both ends of the upper holder member 35 a are fixed to the lower end of the upper frame 22 via the support bracket 36, and the lower holder member 35 b Are fixed to the lower frame 23 via a support bracket 37, and the holder member 35 is divided into five blocks in the axial direction of the cable body 3, and 12 heater elements 18 are provided inside each block in the circumferential direction. Cable body 3 at predetermined intervals
The heater elements 18 are attached to a holder member 35 via a spacer member 38 at a predetermined distance from the cable body 3.

Each of the heater elements 18 has a block-shaped main body member 18a made of ceramic material and a nichrome wire (not shown) embedded therein. When the main body member 18a is heated by energizing the nichrome wire, the main body member 18a is heated. , And emits far-infrared rays toward the cable body 3. The heater element 18 may be one in which a voltage is directly applied to a block-shaped main body member 18a made of a ceramic material so that far infrared rays are emitted. Reference numeral 39 denotes each heater element 18
This is a terminal for energizing the terminal.

Referring to the cooling device, FIG.
As shown in FIG.
A pair of liquefied nitrogen cylinders 40 is rotatably supported via a shaft member oriented in the left-right direction, and four cooling nozzles 41 are provided on the rear wall surface of the cooling chamber 27. Is connected to the liquefied nitrogen cylinder 40 through the liquefied nitrogen, and the heated and fused primer is cooled by the liquefied nitrogen discharged from the cooling nozzle 41. Note that reference numeral 50/5
Reference numeral 1 denotes an exhaust duct and an exhaust fan for ventilating the inside of the heating chamber 26, respectively.

Next, the operation of the primer welding device will be described. The upper frame 22 and the lower frame 23 are combined and coupled from above and below the cable body 3, the cable body 3 is held by a pair of front and rear guide mechanisms 29, and the welding unit H is movably supported by the cable body 3.

Next, each heater element 18 of the heating unit 19 is energized and the cable body 3 is moved from the body member 18a.
The winder 8 is driven to emit the liquefied nitrogen from the cooling nozzle 41 and irradiate the welding unit H at a predetermined speed (approximately 0.7 m / min).
Move up to the side. As a result, the cable body 3 relatively moving in the welding unit H is connected to the heating unit 19.
While passing through the inside, each heater element 18
The primer applied to the outer peripheral surface is heated and melted and fused to the coating portion 5 by the far infrared rays from
Is rapidly cooled by the liquefied nitrogen discharged from the cooling nozzle 41 while passing through.

Since the primer can be heated and melted with far infrared rays and welded to the coating portion 5 without bringing the heater element 18 into contact with the primer, the structure of the primer welding apparatus can be greatly simplified, and the thermal efficiency for heating can be improved. Can be greatly improved. While continuously moving the welding unit H at a predetermined speed along the cable body 3, the primer can be heated and melted and welded to the coating portion 5, so that the work efficiency of the welding work can be greatly improved.

As described above, according to the primer welding apparatus, since the heater element 18 can be fixedly provided to the holder member 35, the configuration of the entire apparatus can be greatly simplified and the durability can be improved. The following effects can be obtained: what can be done, the thermal efficiency for heating can be greatly improved, and continuous construction can be performed and work efficiency can be greatly improved.

The welding unit H has a guide roller 30.
It is also possible to omit the transfer mechanism M by providing a motor for rotating at least one of the motors 31 and making the welding unit H self-propelled. In the above embodiment, the cable body 3 is cooled with liquefied nitrogen, but may be cooled with cooling water or the like. In this embodiment,
Although the present invention is applied to the primer welding device for welding the primer to the cable body 3 of the bridge B, the present invention is similarly applied to an inclined or horizontal cylindrical structural member of a structure other than the bridge B. Can be done.

[Brief description of the drawings]

FIG. 1 is a side view of a bridge.

FIG. 2 is a side view of a main part of a bridge.

FIG. 3 is a partially cutaway perspective view of a welding unit.

FIG. 4 is a longitudinal sectional view of a welding unit.

FIG. 5 is a vertical sectional view showing the vicinity of a guide mechanism.

FIG. 6 is a side view of a main part of the guide mechanism.

FIG. 7 is a longitudinal sectional view showing the vicinity of a heating unit.

FIG. 8 is a process chart of a painting operation.

[Explanation of symbols]

 B Bridge M Transfer device H Welding unit 3 Cable body 5 Coating part 18 Heater element 19 Heating unit 21 Frame 29 Guide mechanism

Claims (1)

(57) [Scope of request for utility model registration] 1. A structure coating film welding apparatus for heating and melting a coating film formed on an outer peripheral surface of an inclined or horizontal cylindrical structural member of a structure and fusing it to the outer peripheral surface of the structural member. Having a plurality of heater elements for irradiating far-infrared rays toward the coating film, configured to be dividable on both sides of the structural member, and disposed so as to surround a predetermined length portion of the structural member in a non-contact manner. Heating means, while holding the heating means so as not to contact the coating film,
A structure comprising: guide support means for movably supporting a heating means on a structural member along a structural member; and transfer means for moving the heating means along the structural member via the guide support means. Apparatus for coating coatings for products.