JPS6310237Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a track rail in an all-position welding device, and in particular prevents the hinge of the track rail from protruding above the outer periphery of the track rail so that the welding cart can run without any trouble, and It can be easily attached to and detached from a fixed pipe, and the track rail joint surface of the split structure has good adhesion.

The all-position welding device is used for all-periphery welding of fixed pipes, etc., and has a configuration as shown in FIGS. 1a and 1b. That is, a ring-shaped track rail 2 consisting of two parts 2a and 2b and having three pieces 30 attached to its inner periphery is detachably attached to the pipe 1. A welding cart 3 is mounted on the outer periphery of the track rail 2 so that it can run on rails 2c and 2d provided on the outer periphery of the track rail 2 at a constant speed by the power of a built-in motor or the like. A welding torch 4, a wire feeder, etc. are attached to the welding cart 3 at a position where the pipe 1 can be welded, and by moving together with the welding cart 3, welding on the outer periphery of the pipe 1 can be carried out over the entire circumference. can be done.

The track rail 2 is divided into two parts so that it can be attached to the pipe 1 etc. during welding work and removed after welding is completed, and each divided part is interconnected with a bolt or hinge mechanism. It is configured so that it can be done. The hinge mechanism conventionally used in truck rail 2 is shown in Figure 2a.
It is similar to the hinge 6 shown in FIG. This is a commonly known hinge structure, and pins 7 are used to hingely connect the divided parts 2a and 2b of the track rail. Since such a hinge 6 is formed so as to protrude above the outer periphery of the track rail 2, it is impossible for the welding cart 3 to run on the outer periphery of the track rail 2.
For this reason, a rail (not shown) is attached to the side of the track rail 2, and the welding cart 3 runs on this side rail to perform welding. However, this configuration requires a strong mechanism to attach the welded cart to the track rail, etc.
Although this is not ideal, it is desirable to run the welding cart on the outer periphery of the track rail.

As shown in Fig. 2c, the hinge structure does not protrude from the outer peripheral surface of the track rail.
There was a track rail 2 in which a convex part 40 was formed on one part 2a and a concave part 41 was formed in the other part 2b, and these were hingedly connected with a pin 43 (for example, in Japanese Patent Publication No. 56-1194). (as stated in the issue). However, in such a configuration, since the pin 43 is located inside the outer peripheral surface of the track rail, when the pin 43 is rotated in the direction of arrow D, the corner portion 44,
In order to prevent the track rail parts 2a and 2b from colliding with each other, a gap 46 had to be provided between the track rail parts 2a and 2b, making it impossible to bring the parts 2a and 2b into close contact with each other. For this reason, for example, when a rack gear 47 is formed on the outer peripheral surface of the track rail and the welding cart is to be moved, the rack gear 47 is interrupted at this gap 46, making it impossible to move the welding cart smoothly.

For a track rail that does not use a hinge connection, the track rail 2 can be completely divided into two parts 2a and 2b as shown in FIG.
There are some that are attached to pipe 1 etc. by connecting them. Since this track rail has no protruding portion on the outer periphery, the running of the welding cart 3 will not be hindered. However, when actually attaching this track rail to the pipe 1, etc., the track rails must first be supported in a combined state and then fixed with bolts 32 one after another, which is a time-consuming task. Particularly, when the diameter of the pipe 1 etc. is large, the diameter of the track rail 2 is naturally also large, and the installation work becomes more laborious and there is a disadvantage that it cannot be installed by one person.

This idea was made in view of the above points, and aims to provide a track rail that is equipped with a hinge mechanism that does not protrude above the outer periphery of the track rail 2 and allows good contact between joint surfaces, and that is easy to attach and detach. purpose.

In order to achieve the above object, the present invention includes a track rail divided into two, a first mechanism for removably crimping the joint surfaces of one of the two track rails, and a first mechanism for removably crimping the joint surfaces of one of the two track rails; It includes a second mechanism that rotatably connects the other joint surfaces of the rails by hinge connection, and a third mechanism that presses the hinged joint surfaces together. The second mechanism includes a pin that is slidably and rotatably engaged in the elongated hole to form the hinge connection. Further, the elongated hole is formed to allow the pin to slide in a direction that causes the hinged joint surfaces to approach or separate from each other. Further, the third mechanism is removably engaged between the hinged joint surfaces, moves the pin along the elongated hole, and presses the joint surfaces together. The first to third mechanisms can be accommodated in recesses formed in the outer circumferential surface of the track rail so as not to protrude from the outer circumferential surface of the track rail.

According to the above configuration, each mechanism for connecting the divided track rails can be accommodated in the recess formed in the outer circumferential surface of the track rail, so that the welding cart can run on the outer circumferential surface of the track rail.

Furthermore, since it has a hinge connection, it can be easily attached and detached.

Furthermore, the pin is engaged with the elongated hole to form a hinge connection, and the hinged joint surfaces are connected to each other by a third
Since it can be crimped by the mechanism, it is possible to improve the adhesion of the joint surfaces by hinge connection, and for example, when forming a rack gear on the outer peripheral surface of the track rail, it prevents the rack gear from breaking at the joint surface and allows the welding cart to run smoothly. can do.

Examples of this invention will be described below with reference to the drawings.

FIG. 3 shows a hinge 10 used in the track rail according to this invention. Note that in FIG. 3, the rails on the outer periphery of the track rail are omitted from illustration. The two-part part 12 of the track rail 2 has a substantially rectangular recess 14 with a flat bottom.
is formed. A U-shaped holder 13 is embedded in the recess 14, and a bolt 31 is mounted on the bottom surface.
Fixed by End 13 of holder 13
Holes 17a and 17b for passing pins 21 are formed in a and 13b. The track rail portion 11 also has a rectangular recess 1 with a flat bottom.
5 is formed. A pair of holders 16a and 16b are embedded on the bottom surface of both sides of the recess 15 and fixed with bolts 33, respectively. Each of the holders 16a and 16b has one end connected to the V
The end portion 13 of the U-shaped holder 13 near the center is in contact with the inside of the U-shaped holder 13.
These holders 16a and 16
b is arranged so as to be sandwiched between the U-shaped holders 13. There are pins 2 in the parts of the holders 16a and 16b that are sandwiched by the holder 13.
Elongated holes 18a and 18b for passing the pin 21 are formed respectively, and the holders 16a and 16b constitute an engaging member for the pin 21. A rectangular member 19 is loosely fitted between the holders 16a and 16b. A hole 20 for passing a pin 21 is provided at one end of this member 19. Holes 17a, 17b of holder 13, holder 16a,
Long holes 18a, 18b in 16b and hole 2 in member 19
A pin 21 is passed through the track rail in the width direction of the track rail, and each of these members is interconnected by the pin 21. Pin 21 is in hole 1 of holder 13
It is fixed to the holder 13 at 7a and 17b. The holders 16a, 16b and the rectangular member 19 are rotatable around the pin 21, and the pin 21 of the holders 16a, 16b also has the long hole 18a,
18b, it is pivotable about pin 21 when it is opposite the position shown in FIG. 3a. Also, the track rail portions 11 and 12 have elongated holes 18a and 1.
They can be mutually displaced by a distance equal to the length of 8b minus the diameter of the pin. A bolt hole 23 is opened from the upper end surface 22 of the rectangular member 19 toward the hole 20, and a bolt 24 is inserted into this bolt hole 23.
is attached via a rectangular presser plate 25 and washers 28. Bolt 24 is presser plate 25
The holding plate 25 is slidable in the axial direction of the bolt 24. This presser plate 25 is attached to the stepped portions 34a and 3 near the center of the holders 16a and 16b.
4b, and connect this with the bolt 24.
By tightening the track rail portions 11 and 12, the track rail portions 11 and 12 can be fixed with no gap between the joint surfaces, as shown in FIG.

FIGS. 4a and 4b show the operation of attaching and detaching the track rail 2 equipped with the above-mentioned hinge 10 to and from the pipe 1. When removing the track rail 2 from the pipe 1, loosen the bolts 24 of the hinge 10 in the state shown in FIG.
The two persons are rotated together around the pin 21 in the direction of arrow A to stand in the position shown in FIG. 4a. On the opposite side of the track rail 2 from the hinge 10, a set screw 26 for locking the track rail 2 in the closed position is provided so as to be embedded in a recess formed on the outer periphery of the track rail. Similarly, as shown by arrow A', the lock is released by raising it outward. Next, attach the track rail part 12 to the pin 21 of the holder 13.
are the elongated holes 17a and 17b of the holders 16a and 16b.
Slide the inside part downward in FIG. 3 and separate it from the track rail part 11 as shown by arrow B in FIG. 4, and finally remove part 12 as shown by arrow C.
Rotate to open the track rail 2 and remove it from the pipe 1.

When attaching the track rail 2 to the pipe 1, the above operations may be performed in the reverse order. In FIG. 4, reference numeral 35 indicates a brake mechanism for stopping the welding cart.

In addition, adjacent track rail portions 2a and 2b
The pins 21 that interconnect the pins 21 do not need to be connected from end to end;
It may be cut into two parts at the middle part. Further, in the illustrated embodiment, the pin 21 is fixed to the holder 13, but it is not necessarily fixed and the holder 13 also has an elongated hole 1.
Elongated holes such as 8a and 18b may be provided so that the pin 21 can slide within these elongated holes.

As explained above, according to this invention, each mechanism that connects the divided track rails can be accommodated in the recess formed on the outer circumferential surface of the track rail, so that the welding cart can be run on the outer circumferential surface of the track rail. Is possible.

Furthermore, since it has a hinge connection, it can be easily attached and detached.

Furthermore, the pin is engaged with the elongated hole to form a hinge connection, and the hinged joint surfaces are connected to each other by a third
Since it can be crimped by the mechanism, it is possible to improve the adhesion of the joint surfaces by hinge connection, and for example, when forming a rack gear on the outer peripheral surface of the track rail, it prevents the rack gear from breaking at the joint surface and allows the welding cart to run smoothly. can do.

[Brief explanation of the drawing]

Figures 1 a and b are front and side views showing the overall configuration of the full circumference welding device, Figures 2 a, b and c are views showing the conventional track rail connection mechanism, and Figures 3 a and b. are a front view and a side view showing an embodiment of this invention in partial cross section, respectively, and Fig. 4a
and b is the track rail 2 according to this invention and the pipe 1.
FIG. 3 is a partial cross-sectional view showing the order in which the parts are removed from the housing. 2... Truck rail, 13, 16a, 16b
...Holder, 18a, 18b...Long hole, 21...
…pin.

Claims (1)

[Claims for Utility Model Registration] A track rail divided into two parts, a first mechanism for removably crimping the joining surfaces of one of the two parts of the track rail, and the other part of the other part of the two part track rail. a second mechanism that rotatably connects the joining surfaces of the pins to each other by a hinge connection; and a third mechanism that presses the hinged joining surfaces together; The pin is slidably and rotatably engaged to form the hinge connection, and the elongated hole is formed to cause the pin to slide in a direction that brings the hinged joint surfaces closer together or farther apart. The third mechanism is removably engaged between the hinged joint surfaces and moves the pin along the elongated hole to press the joint surfaces together, A track rail for fixed pipe welding, wherein the first to third mechanisms can be accommodated in recesses formed in the outer circumferential surface of the track rail so as not to protrude from the outer circumferential surface of the track rail.