JPH05318184A - Device for automatically pasting one side welding backing tape - Google Patents

Abstract

PURPOSE:To weld one side of steel tube from the internal surface in labor-saving and power-saving, to reduce the cost and to shorten the term of working by feeding the backing tape from the reel with the same velocity as the running velocity, and pushing the backing tape to the back surface of groove with the sliding copper backing metal. CONSTITUTION:A backing tape T is pulled out of a feed reel 22, and brought to the back surface of the groove. In the time, a holding tool 28 which is supported by a backing tape pushing mechanism body 20 with a pin 27 presses a push roller 26 to a feed roller 21 by being corrected with a rod with male screw 28a, a knob with female screw 28b and a spring 29. An sliding copper patch metal 30 of the back side of the backing tape T is pushed out through a set bolt 31 and a spring 32 which are provided on the backing tape pushing mechanism body 20 and the the backing tape T is pushed to the back surface of groove with a guide roller 33. In such a way, the backing tape T is statically supported against the back side of the groove, pushed with the sliding copper patch metal 30, and the molten metal of an automatic welding torch which is arranged inside the above of the center of the sliding copper patch metal 30 is received and the nondefective one side welding can be executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backing tape automatic sticking device applied to single-sided welding of hydraulic steel pipes and the like.

[0002]

2. Description of the Related Art Conventionally, in a welding work requiring high quality such as a hydraulic steel pipe, there is no effective one-sided welding device, and therefore, FIG.
As shown in the longitudinal sectional view and the lateral sectional view in FIG. 18, after the one-sided welding by the automatic welding torch A on the inner surface of the steel pipe P, the worker M is forced to perform the manual welding on the concrete C which is placed in advance. Therefore, a relatively large-diameter tunnel N is excavated so that a clearance W can be provided on the outer surface side for the worker M to enter.

[0003]

However, since such a conventional work requires excavation of a large diameter hole,
Enormous cost and construction period are required. In addition, a single-sided welding device used in shipbuilding or the like generally uses a backing tape T as shown in the cross-sectional view of FIG. Since the worker performs welding and also removes the backing tape after welding, a large labor cost is required.

The present invention has been proposed in view of the above circumstances, and is an economical one-sided welding backing tape for reducing the cost and the work period by welding one side of a steel pipe or the like from the inside in a labor-saving and labor-saving manner. An object is to provide an automatic sticking device.

[0005]

Therefore, the present invention is directed to an inner surface one-sided automatic welding system for an iron pipe or the like, and in an inner surface one-sided automatic welding system for a steel pipe or the like, an arc-shaped angle laid along the outer surface side of the groove. A backing truck that is mounted on a rail and consists of a motor, a drive roller, and a pressure roller that travels frictionally, and a feed roller for the backing tape that is attached to the truck and that has the output shaft of the drive wheel provided under the truck through a universal joint. And a mechanism for feeding the backing tape from the reel at the same speed as the running speed, and a mechanism for pressing the backing tape against the back surface of the groove with a sliding copper plate.

[0006]

With this structure, the backing tape is sent out by the amount of travel of the backing truck, and the backing tape is statically attached to the steel pipe, which is the material to be welded, without shifting, and Since the molten metal automatically supported from the inside is received by being supported by the sliding copper metal plate on the outside, good one-sided welding is possible. After welding, the attached backing tape is a motor-driven take-up reel with a torque limiter and is peeled off and taken up without affecting the front.

[0007]

1 is a side view of the present invention, FIG. 2 is a front view of the outside of FIG. 1, and FIG.
2 is a bottom view of FIG. 2 seen from below, FIG. 4 is a front view of the upper portion of the main body of FIG. 1, FIG. 5 is a sectional view taken along the line VV of FIG. 4, and FIG.
7 is a side view showing the mounting procedure of the backing tape pressing mechanism, FIG. 8 is a plan view of the backing tape pressing mechanism of FIG. 7, FIG. 9, FIG. 10, FIG. 12 and 13 are IX-IX, XX, XI-XI, XII-XII and XI of FIG. 8, respectively.
II-XIII arrow sectional view, FIG. 14 is a sectional view of the drive part of the take-up reel of FIG. 3, FIG. 15 is a longitudinal sectional view showing a working procedure of single-sided welding of a hydraulic iron pipe by the device of the present invention, and FIG. 16 is a sectional view of FIG. FIG.

First, in FIGS. 1 to 4, 1 is a main body,
The pair of left and right upper wheels 2 and 2 are mounted on the arc-shaped angle rail L, and the pressure roller 3 and the drive roller 4 press the angle rail L between its inner and outer surfaces as shown in FIG. As shown in FIG. 5, reference numeral 5 denotes a screw handle, which is provided on the upper portion of the main body 1 and is screwed with the screw member 6 to project the tip pin 8 through the built-in leaf spring 7.
The upper end of the vertical arm 10 pivotally supported by the horizontal pin 9 is pushed at the upper portion, and the pressure roller 3 at the lower end is pushed against the inner side surface of the angle rail L. As shown in FIG. 6, above the angle rail L, the drive roller 4 having the seizure rubber 12 fitted to the lower end of the output shaft of the vertical motor 11 and the collar 13 for preventing wheel slippage is provided outside the angle rail L. It comes in contact with the side surface.

In FIG. 6, the shaft 14 of the drive roller 4 is attached to the backing tape pressing mechanism 20 attached to the lower portion of the main body 1 by the pins 18 and 19 (FIG. 7) via the gears 15 and 16 and the universal joint 17. Attached backing tape feed roller 21
It is connected to (Fig. 1) and gives a driving force to it.

In such a structure, the backing tape pressing mechanism 20 is provided with a backing tape supply reel 22 on one side and a take-up reel 23 on the other side, as shown in FIGS. , The backing tape T from the supply reel 22 passes through the guide rollers 24 and 25, and the pressing roller 2
6 and the feed roller 21 nip the same roller 2
1 is firmly sandwiched by the needle on the outer surface, and the supply reel 22
It is pulled out from and brought to the back of the groove G. that time,
The holder 28 supported by the pin 27 on the backing tape pressing mechanism 20 is adjusted by the male screw rod 28a, the female screw knob 28b and the spring 29 to press the pressing roller 26 against the feed roller 21. Sliding copper plate 3 behind the backing tape T
As shown in FIGS. 8 and 10, 0 is extruded via a set bolt 31 and a spring 32 provided on the backing tape pressing mechanism 20, and the backing tape T is guided by a guide roller 33. As shown in FIG. 8, it is pressed against the rear surface of the groove, and is peeled off by a guide roller 34, and passes through a guide roller 35 (FIG. 1) and a motor 36 (FIG. 4) and its output shaft torque limiter 37 (FIG. 14), the worm / worm gear 38 rotates the take-up reel 23.
In this way, the backing tape T is statically supported on the back side of the groove G and pressed by the sliding copper plate 30, and the automatic welding torch is arranged on the inner side of the center of the sliding copper plate 30. Accepts the molten metal of A and can perform good one-sided welding.

[0011]

According to such an apparatus, as shown in the longitudinal sectional views of FIG. 15 to the transverse sectional view of FIG. 16, a worker does not stand on the outer surface side over the entire circumference of the steel pipe P, and one side from the inner surface side. Welding can be performed, and the excavation diameter of the outer peripheral hole of the steel pipe can be reduced to reduce the cost of civil engineering work and shorten the construction period.

In short, according to the present invention, in the automatic welding system for one side of the inner surface of a steel pipe or the like, the motor mounted on the arc-shaped angle rail laid along the outer surface side of the groove,
A backing truck that consists of a drive roller and a pressure roller and runs frictionally, and the output shaft of the driving wheels attached to the truck is connected to the feeding roller of the backing tape provided at the bottom of the truck via a universal joint, With a mechanism that feeds the backing tape at the same speed as the running speed and a mechanism that presses the backing tape against the groove back surface with a sliding copper plate, the steel pipe can be labor-saving and labor-saving from one side INDUSTRIAL APPLICABILITY The present invention is extremely useful industrially, because an automatic backing tape automatic sticking device for welding which reduces cost and shortens the construction period is obtained.

[Brief description of drawings]

FIG. 1 is a side view of an automatic backing tape attaching apparatus according to an embodiment of the present invention.

FIG. 2 is an outside front view of FIG.

FIG. 3 is a bottom view of FIG. 2 seen from below.

FIG. 4 is a front view of the outside of the upper portion of the main body of FIG.

5 is a cross-sectional view taken along the line VV of FIG.

6 is a partially enlarged vertical sectional view of FIG.

FIG. 7 is a side view showing how to attach the backing tape pressing mechanism.

8 is a plan view of the backing tape pressing mechanism of FIG. 7. FIG.

9 is a sectional view taken along the line IX-IX in FIG.

10 is a cross-sectional view taken along line XX of FIG.

11 is a sectional view taken along the line XI-XI of FIG.

12 is a sectional view taken along the line XII-XII in FIG.

13 is a sectional view taken along the line XIII-XIII in FIG.

FIG. 14 is a sectional view of a drive unit of the take-up reel of FIG.

FIG. 15 is a side view explanatory diagram showing a work situation of single-sided welding of a penstock of the present invention.

16 is a sectional view taken along line XVI-XVI of FIG.

FIG. 17 is a vertical cross-sectional view showing a single-sided welding work procedure of a conventional penstock.

18 is a cross-sectional view of FIG.

FIG. 19 is an explanatory diagram of conventional single-sided automatic welding in shipbuilding.

[Explanation of symbols]

 1 main body 2 wheel 3 pressure roller 4 drive roller 5 screw handle 6 screw member 7 leaf spring 8,9 pin 10 vertical arm 11 motor 12 burned rubber 13 collar 14 shaft 15,16 gear 17 universal joint 18,19 pin 20 back This tape pressing mechanism 21 Feed roller 22 Supply reel 23 Take-up reel 24, 25 Guide roller 26 Pressing roller 27 Pin 28 Holding tool 28a Male threaded rod 28b Female threaded rod 29 Spring 30 Sliding copper dowel 31 Set bolt 32 Spring 33, 34 Guide roller 35 Guide roller 36 Motor 37 Torque limiter 38 Worm / worm gear A Automatic welding torch G Groove L Angle rail M Worker P Steel pipe T Backing tape W Clearance

Front page continued (72) Inventor Nozomi Watanabe 1-1-1, Wadasaki-cho, Hyogo-ku, Kobe-shi, Hyogo Mitsubishi Heavy Industries, Ltd. Kobe Shipyard (72) Inventor Ryoichi Tatsumi, Wadazaki-cho, Hyogo-ku, Kobe-shi, Hyogo No. 1-1, Mitsubishi Heavy Industries, Ltd. Kobe Shipyard

Claims (1)

[Claims] 1. An automatic welding system for one side of an inner surface of a steel pipe or the like, in which a backing truck, which is mounted on an arcuate angle rail laid along the outer surface of the groove, comprises a motor, a drive roller, and a pressure roller, and frictionally travels. And a mechanism that connects the output shaft of the drive wheels attached to the same truck to the feed roller for the backing tape provided at the bottom of the truck via the universal joint, and sends the backing tape from the reel at the same speed as the running speed, A single-sided welding backing tape automatic affixing device, which is equipped with a mechanism for pressing the backing tape against the back surface of the groove with a copper slide.