JPH0534863Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a copper butt pressing device for rail welding.

(Prior art) In conventional rail welding, when a copper butt is brought into contact with the rail, as proposed in Utility Model Application No. 63-58183, the welding ends at the foot of the rail and before reaching the abdomen, it touches the rail. A spring is provided between the sliding copper butt to be pressed and a pressing steel plate behind the copper butt, and the copper butt and steel plate are connected using bolts and wedges, and a drive consisting of a motor, reducer, and rack is provided. There is a method in which a copper butt is brought into contact with a rail using a device. This device can mechanically contact the copper abutment during welding without interrupting welding. Furthermore, by utilizing the deflection of the spring, the copper stopper can be brought into contact with the rail with constant pressure. In addition, even if the device is not set at the desired position with respect to the rail abutment, the device, which has degrees of freedom in vertical, horizontal, and diagonal directions perpendicular to the welding line direction, can correct the deviation. It is possible to absorb and abut the sliding copper abutment at a desired position.

In addition, by locking the sliding copper butt with bolts and wedges, the sliding copper weld can be attached and detached from the steel plate with one touch, improving workability after welding and making it easier to remove the sliding copper weld from the steel plate. It also has the advantage of being easy to maintain. However, in order to prevent misalignment of the set position when installing the device on the rail, this device uses a pressing steel plate with a size larger than the head of the connecting bolt in order to obtain freedom in the vertical and horizontal directions with respect to the welding line direction. Although a hole is provided, this method of fixing the device does not provide a sufficient degree of freedom when attaching the device to the rail. This will be explained below using the drawings. Fig. 3 shows an example of the sliding copper butt fixing part proposed in Utility Model Application No. 63-58183. 3 is a steel plate for pressing, 8 is a wedge, and 2 is a bolt. If you try to use this device to give the length of A in the figure a degree of freedom in the vertical and horizontal directions of the sliding copper stopper, bolt 2
The gap between the hole diameter between the head and the pressing steel plate 3 is A, and the gap between the bolt outer diameter B and the inner surface 20 of the wedge 8 must not be less than A.
Since it is locked by the wedge 8, an overlapping portion α is necessary. Also, the bolt outer diameter B must be calculated, and the total length C is 2A +
1/2B+α, and the diameter of the hole 4 in the pressing steel plate becomes 4A+B+2α. For example, the length of A
15mm, the bolt outer diameter B is 10mm, and the overlapping portion α is 5mm.The hole diameter needs to be at least φ80mm. In addition, considering the width of the groove 19 for inserting the wedge 8, 90 mm is required, so if two connecting bolts 2 are used to lock the copper abutment in a more stable manner, the device will become larger. Limited space on the gold back (height direction 150~200
mm) is difficult to install. As explained above, in this device, when attaching the copper butt to the rail,
There is a problem in that it is not possible to obtain the necessary and sufficient degree of freedom, which hinders welding preparation work. In addition, this device uses the deflection of a spring installed between the copper abutment and the pressing steel plate and a limit switch to abut the copper abutment against the rail with a constant pressure, while also preventing damage to the rack and reducer. Radiant heat, fumes, and spatter during welding may cause the limit switch to malfunction, and there is a problem in that damage to the rack and reducer cannot be prevented.

(Problems to be solved by the invention) The present invention solves the above-mentioned problems of the copper butt pressing device used for rail welding, simplifies the welding work, and allows the welding to be carried out from the rail foot to the head without interrupting welding. The present invention provides a copper butt pressing device that can perform continuous welding.

(Means for Solving the Problems) The present invention aims to solve the problems of the above-mentioned prior art, and its gist is to weld the rails so that the welding ends at the foot and before reaching the abdomen. When connecting the sliding copper butt that is pressed against the copper butt and the pressing steel plate behind the copper butt, a bolt with a diameter larger than the head of the bolt for connecting the sliding copper butt and the pressing steel plate is attached to the pressing steel plate plate surface. A hole is provided, and the bolt head is locked with a wedge that has a degree of freedom in the rotational direction and the front and back directions around the shaft 7 on the surface of the pressing steel plate, and a hydraulic drive is used as a means for driving the locked device. A copper butt pressing device for rail welding is characterized by using a mechanism. This will be explained below using the drawings. Figures 1a and 1b show an example of a copper dowel pressing device according to the present invention. 1 is a sliding copper dot, 2 is a bolt for connecting the sliding copper dot and a steel plate for pressing the copper dot, 3 is a steel plate for pressing the copper dot, and 4 is a bolt that passes through the steel plate 3 for pressing the copper dot. This hole is for holding the bolt 2, and the difference between the diameter of the bolt head and the diameter of the hole 4 is the tolerance during connection. Further, 5 is a spring, and 6 is a washer that prevents the spring 5 from falling into the hole 4. Further, 7 is a shaft located on the surface of the steel plate 3 for pressing the copper dowel, and 8 is a wedge that has degrees of freedom in the rotational direction and the front-rear direction (indicated by ←→ in the figure) around the shaft 7. Further, a pin 9 is used to adjust the degree of freedom in the rotational direction of the wedge, and is placed in advance at an appropriate position to match the hole 4. In use, the above parts are assembled as a set, and the sliding copper butt 1 is brought into contact with the rail 10 by a hydraulic drive mechanism installed parallel to the weld line.

(Example and operation) The present invention will be explained in detail below with reference to an example of a copper butt pressing device for rail welding shown in the drawings. FIG. 2 shows a side view of an embodiment in which the sliding copper butt 1 is brought into contact with the rail 10 using the device shown in FIG. 1 of the present invention. The sliding copper stopper 1 shown in the figure can be brought into contact with the rail by a hydraulic drive device consisting of the device shown in FIG. . In addition, by adjusting the hydraulic pressure to an appropriate pressure in advance, it is possible to constantly contact with a constant pressure. Furthermore, unlike conventional methods, no reduction gears or racks are used, so there is no damage to the device, no rattling, and no play between gears.

Also, by using the device shown in Fig. 1, the degree of freedom for attaching the sliding copper butt 1 to the pressing steel plate 3 is the first.
In the figure, when trying to give the sliding copper rest a degree of freedom of length A in the vertical and horizontal directions, the gap between the head diameter of the bolt 2 and the diameter of the hole 4 passing through the pressing steel plate 3 is A. , and the outer diameter of the bolt 2 is B. In addition, since the device of the present invention is made by locking two bolt heads with a wedge 8, the two bolt heads must not be smaller than the outer diameter of the bolt two, so if the locked part is α, then the total length The size C will be A+1/2B+α, and the diameter of the hole 4 in the pressing steel plate will be 2A+B+α. For example, the length of A is 15mm, B is 10mm, and α is 5mm.
Calculated in mm, the hole diameter should be at least φ50mm, and the device will not be large as in the conventional method, and there will be no interference with the sliding copper butt 1 or other devices, and it will hit the rail 10. I can contact you.

Further, using the apparatus shown in FIG. 2, the first layer was welded using a submerged arc welding method, and the second and subsequent layers were butt welded using an electroslag welding method.

In the welding preparation work, for the rail 10,
When the device shown in Fig. 2 of the present invention was intentionally installed 10 mm above the original position and the sliding copper butt 1 was connected to the steel plate 3 for pressing the copper butt, the head diameter of the bolt 2 was φ15 mm. Steel plate 3 for pressing copper butt against
The diameter of the hole 4 drilled in the board surface was φ45 mm, which absorbed the deviation of 10 mm from the original position, and the sliding copper stopper 1 could be installed at the desired position without any problems. Also, as the welding progresses from the foot to the abdomen, the sliding copper dowel 1
When the sliding copper butt 1 was brought into contact with the rail 10, the sliding copper butt 1 came into contact with the rail 10 smoothly, and there was no slag leakage during welding, making it possible to perform continuous welding up to the head.

(Effects of the invention) As explained above, by using the copper butt pressing device of the invention, rail welding work can be carried out smoothly, and its industrial value is high.

[Brief explanation of the drawing]

Fig. 1a is a side view of the copper dowel pressing device of the present invention, Fig. 1b is a side view of the device showing the embodiment of Fig. 1a and the degree of freedom of the wedge, and Fig. 2 is a driving means for the copper dot. A side view of an embodiment in which a hydraulic mechanism is used in combination with the device shown in FIG. 1, and FIG. 3 is a side view of a copper dowel pressing device devised in Japanese Utility Model Application No. 63-58183. 1... Sliding copper butt, 2... Bolt, 3... Steel plate for pressing the copper butt, 4... Hole, 5... Spring, 6...
...watshiya, 7...shaft, 8...wedge, 9...
Pin, 10...Rail, 11...Arm, 12...
...Drive device holding plate, 13...Guide rail, 14
...Rail holder, 15...Hydraulic cylinder, 1
6... Copper butt for the head, 17... Copper butt for the foot of the rail, 18... Copper butt surrounding the rail, 19... Wedge groove, 20... Inner surface of the wedge.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Connecting a sliding copper butt that is used for automatic rail welding and is pressed against the rail before welding ends at the foot of the rail and reaches the abdomen, and a pressing steel plate located behind the copper butt. When doing this, a hole with a diameter larger than the head of the bolt connecting the copper butt and the steel plate for pressing is provided on the surface of the steel plate for pressing, and the bolt head is rotated in the rotational direction and in the front and back directions around the axis on the surface of the steel plate for pressing. A copper butt pressing device for rail welding, characterized in that it is locked by a wedge having a degree of freedom. 2. The copper butt pressing device for rail welding according to claim 1, characterized in that the copper butt is brought into contact with the rail using a hydraulic drive mechanism centered around a hydraulic cylinder and a guide rail.