JPS6234588B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a device for repairing and regenerating the lug portion of a track shoe of a vehicle.

(Prior Art) A shoe is a grounding member that forms the circumferential surface of a track, and a shoe for medium to large vehicles weighs 15 to 40 kg each. The protrusions that dig into the ground of the shoe are called lugs. These lugs wear out with use, reducing the track's traction. Therefore, this shoe is removed, the worn lug is cut off near the base, and new lug material is welded. FIG. 1 shows an example of the repaired shoe, where 1 is the shoe body, 2 is the lug, and 3 is the welded part. As you can see at first glance, the main steps in this repair work are removing the worn lugs, fabricating new lug material, and welding the new lug material to the shoe body. However, since new lug material is produced in stock, it can be excluded from direct repair work.

Therefore, the shoe repair work consisted of lug removal, temporary lug welding, and permanent welding. For this reason, the only conventional repair equipment was an automatic gas cutting device as shown in FIG. 2, a welding turntable as shown in FIG. 3, and an arc welder (not shown).

In the conventional work using these, the shoes 1 to be repaired are transported one by one from a storage area by hand or by a crane, and set up along the running platform 5 of the gas cutting machine 4 as shown in FIG. Then, cut the crater 4a of the cutting machine 4 into the
Correct the position of shoe 1 by running it along the lug cutting line. Next, the crater 4a is ignited, first heated until the end of the cutting line becomes red hot, and then cutting oxygen is injected,
Advance the cutting machine to finish cutting.

Once the shoe 1, which has been heated up by the heat during cutting, has cooled down, it is placed flat on a temporary welding table in the welding workplace by hand or by a crane. Then, place the prepared new lug material after removing the worn lug of shoe 1 so that it becomes lug 2 in Fig. 1. Support it with your left hand, and use the welding rod holder or torch in your right hand to position it in the correct position.
Temporarily weld in position. The slag and spatter are removed, the shoe 1 is hoisted up using a hoist, etc., and the shoe 1 is bolted to the horizontal mounting plate of the welding rotary table 6, and then the shoe 1 is returned to the position shown in FIG. 3. Then, final welding is performed on the top surface of welding part 3, and the mounting plate is rotated 180 degrees to complete welding on the back side. The welded shoe is lowered from the turntable 6 using a hoist or the like, and slag and spatter are cleaned and other finishing touches are performed. That's what it means.

The actual welding of the lug material and shoe cannot be fully automated due to the short welding length, so manual welding is required.

(Problems to be Solved by the Invention) In the above-mentioned conventional process, the time and labor required for transporting the heavy shoe, attaching (positioning) it to the processing position, and removing it are greater than the time and labor required for cutting and welding itself. is much larger. The purpose of this invention is to develop a device that can significantly save time and effort. Therefore, the present invention does not simply improve the cutting, welding, or transportation mechanism, but also improves the overall efficiency and quality of various processes as a repair device.

The first thing to consider is to stop carrying, installing, and removing heavy shoes over and over again, and instead install them in a fixed position and complete cutting and welding one after another. However, cutting and welding require specialized techniques, and in terms of quality and efficiency, they must be performed at each location and with each jig. Therefore, reducing the transportation, installation, and removal of shoes seemed impossible.

(Means for Solving the Problems) This invention positions a plurality of shoes by placing their back sides against the surface of the jig so that the lug parts are lined up horizontally with their end surfaces in contact with each other, and the parts to be fixed are positioned. A plate-shaped jig with a handle, a dolly that rotatably supports the jig with a horizontal axis along its surface in a posture in which the plurality of attached shoes are connected horizontally, and a dolly that supports the said jig at the shoe attachment/removal position, the fusing position, A circulation path for circulating to the temporary welding position, provided at the welding position,
An automatic fusing device that successively cuts off the lugs of each shoe on the truck that has reached this position, is installed at the above temporary welding position, and temporarily welds new lug material to each shoe on the truck that has reached this position. and an automatic welding device that is installed at the main welding position and performs continuous main welding on the temporary welding portions of each shoe on the truck that has reached this position.

(Function) This invention makes use of the unique shape of the endless track shoe, and in consideration of the content of the lug repair work, uses a trolley with a jig that has a simpler structure than the conventional welding rotary table, so that only welding can be performed during the repair work. This jig is suitable for both cutting and temporary welding, which have different characteristics. That is, a general welding rotary table (jig) operates at least in two dimensions, but in this invention, the jig simply rotates in one direction. Even so, at the cutting position, the 180° rotation makes it possible to continuously cut the lugs of the shoe attached to the jig, and then also continuously cut the shoe attached to the opposite side or back side of the jig (see Figure 7).

Similarly, by rotating the jig 90 degrees, we were able to work in the optimal position for temporary welding by keeping the attached shoe horizontal and standing the lug piece to be welded vertically.

By rotating the jig 180 degrees, it was possible to weld both sides of the lug (see Figure 8).

In addition, this invention makes it possible to automate the lug welding process, which conventionally could not be automated due to the short welding length, by attaching multiple shoes to the same jig in a horizontal line, and also makes gas cutting continuous and efficient. , improved quality.

This invention attaches wheels to jigs that have conventionally been fixed at each workplace and moves them along a circulation path, allowing multiple positioned jigs to be delivered to each workplace that requires specialized skills such as fusing, temporary welding, and actual welding. It is possible to transport the shoes accurately and efficiently, and after one cycle, the shoes can be replaced all at once at the installation/removal position.

(Embodiment) Figures 4 and 5 are a plan view and an elevation view of an embodiment of this invention. 10 in Fig. 4 is the position where a large number of shoes are installed and removed together on the jig on the trolley; 2
0 is an automatic welding device at a fusing position, 30 is an automatic welding device at a temporary welding position, and 40 is an automatic welding device at a main welding position, all of which are on the rectangular circulation path R.

The trolley with jig 11 is shown in FIGS. 5 and below, and the trolley 11 is omitted in FIG. 4 so as not to hide the rails 12 of the circulation route R and the traversing rail platform 13. Parallel reciprocating straight rails 12, 12 and the reciprocating rail 1
A rectangular circulation path R for the jig-equipped truck 11 is formed by the respective transverse rail stands 13, 13 that connect the front and rear ends of the rails 2, 12. A shoe installation/removal position 10 with a crane, hoist, etc. (not shown) is located immediately at the starting point and the ending point, and an automatic fusing device 20 is located on the way out.
There is a temporary welding position 30 and an automatic welding device 40 on the way back. Although the order of each process does not change, its arrangement on the circulation path R can change.

The circulation route R may not be a rail, but may be a concrete floor or an earthen floor, but in general, rails are practical in order to smoothly run a fixed course of a large number of heavy shoes 1 and a trolley 11 attached to a jig. It is. The form of the rail does not matter.

The rail 12 of the illustrated embodiment is the most common in the industry. The transverse rail stand 13 is the fourth
As shown in Figures 1 to 6, a short rail connected to the end of the reciprocating rail 12 is configured to allow the jig-equipped cart 11 to be mounted on it and to be rolled on the transverse rail 13a. The direction of the short rail is always the reciprocating rail 12
Keeping the orientation.

Now, the jig-equipped truck 11, which can be called the main character of this invention, is shown from the front in FIG. 6, and from the side in FIGS. 7 and 8. In this system, shaft supports 14, 14 are erected at the front and rear ends of a truck that runs on ordinary rails, and a rotating jig 15 is horizontally supported at both ends by bearings at the upper ends of the shaft supports 14, 14.
In this example, the rotating jig 15 is a rectangular box-shaped mounting plate with support shafts attached to both ends. The elongated holes 16 in FIG. 6 are located on both sides, and serve both as weight reduction holes for the jig 15 and through holes for bolts that fasten the shoes 1 at positions corresponding to both sides of the jig. Since the shoe 1 has mounting holes for mounting on the endless track, bolts are passed through these holes and tightened on both sides of the jig 15. If you attach the elongated reference plate 17 along the center line of both sides of the jig 15 and place the edges of the shoes 1 on both sides of the reference plate 17, no matter how many shoes 1 are lined up, their lug parts will be aligned horizontally, and each shoe 1 will be horizontal. I try to stay calm.

In this example, six shoes 1 are arranged on one side of the jig 15, three each in two rows above and below, or 12 shoes 1 on both sides are sent out at once.

Note that the jig 15 and the method of attaching the shoes 1 to it are not limited to the above-mentioned method, but may vary depending on the designer. Any rotating jig that can be installed side by side so that they are aligned horizontally and turned upside down will suffice.

At position 10, where the shoe 1 is attached to and removed from the rotating jig 15, the jig 15 can be rotated by holding the handle 18 in a position that is most convenient for attachment.
This is now the only location where cranes, hoists, etc. are used.

After the installation of shoe 1 is completed, the trolley with jig 11
is pushed onto the forward rail 12 from the shoe attachment/removal position 10 on the traverse rail base 13.

When the truck 11 enters the automatic fusing device 20, the wheels are fixed by a manual brake 19 shown in FIG.
At that time, the cutting positions of the shoes 1 on both sides of the jig 15 are as follows:
It has entered under the crater 21 of the gas cutting machine 20a prepared in advance (Fig. 7).

At first, only one end of the cutting position of the lugs 2 lined up in a line becomes red hot due to the crater 21, but once cutting is started, all of the lugs 1 can be cut at once, no matter how many lugs 1 are lined up. Once the lugs 2 on both upper sides are cut off at once, the rotating jig 15 is turned 180 degrees and the remaining two rows of lugs 2 are also cut off. The handle 19a accurately stops the jig 15 vertically or horizontally.

After the wear lugs 2 are cut off in this way, the jig-equipped cart 11 is pushed and transferred to the return rail 12 via the traverse rail platform 13. Temporary welding position 3 of return rail 12
0 is indicated by a chain line in FIG. 4, but this may be an approximate position. In short, the manual welding device 31,
Any location near the rug storage area 32 is sufficient.

At this temporary welding position 30, the rotary jig 15 is turned 90 degrees from the position shown in FIG. 7 to be horizontal, and the lug material 2 can be temporarily welded in the horizontal position shown in FIG. After cutting the worn lugs, the lug material 2 is held upright and temporarily fastened at intervals. The welding slag is cleaned between processes. Since the lug material 2 side has a bevel, it is best to use a simple jig so that the bevel rests on it after cutting and stands vertically, leaving it up to the welder's imagination.
Conventionally, the lug material fixing method for temporary welding and the welding position were unstable, which could lead to inaccurate right angles between the lug and shoe, but with this invention, the shoe can be accurately held in a horizontal position. Since the lug material is vertically held and welded on top of the lug material, an accurate right angle can be easily obtained.

Next, by pushing the jig cart 11 once, the automatic welding device 40 is entered. Rotating jig 1 is installed in advance as shown in Figure 8.
5 is vertically raised and fed in, the welding part 3 of the shoe 1 is placed in front of the waiting automatic arc welding torch 41. Since the power welding machine 42 and the control box 43 have been adjusted in advance according to the dimensions of the shoe 1, by applying current and starting the feed motor 45, the upper and lower two torches 41, 41 run along the rail 44, respectively. The welding parts 3 of each shoe 1 lined up in a line are finally welded at once. It is also easy to weld multiple layers by turning the torch 41 back and forth if necessary. In this case, CO ₂ arc welding was used for automatic welding.

After the main welding of the upper and lower shoes 1 on one side is completed, the welding on the opposite side is performed. In this embodiment, the automatic welding device 40 is equipped with a rotary table 46, and the cart 11 with a jig is placed on the rail 12a.ゝ180
゜Turn horizontally. However, if a rotary table 41' is added on the opposite side of the welding torch 41, as shown by a chain line in FIG. 8, the rotary table 46 becomes unnecessary.

When welding is completed, the trolley with jig 11 is pushed and placed on the transverse rail platform 13 and returned to the starting point. Remove all of the shoes 1 repaired here from the jig, immediately attach the prepared worn shoes, and install the automatic fusing device 2.
Send it to 0.

The removed repair shoes are still connected horizontally, three at a time, so cut them off from one side using the gas cutting blowpipe. Work such as cleaning welding slag and spatter, filling pots in the welded area, and applying a grinder are also carried out near this installation/removal position, so the finished shoes can be transported together with a crane.

The above process description is for the case where there is only one jig-equipped cart 11. If multiple units are used, efficiency will be significantly improved. That is, since the automatic fusing and welding of the shoes are lined up horizontally, it takes a long time to perform automatic fusing and welding, so during that time it is necessary to move another trolley with a jig 11, perform temporary welding, attach and remove the shoes, and connect them by welding. Can perform many manual tasks such as cutting shoe boundaries, repairing the ends of welds, and cleaning slag and spatter.
A well-known device may be provided to automatically stop the welding torch when it has finished cutting or welding a series of shots.

The advantage of fully automated cutting and welding is that the automatic machine itself has a large and stable capacity, and since a complete jig is essential, the workpiece is maintained in an optimal state, resulting in high quality and high efficiency. This is what happens.

As described above, one embodiment has been described, but the present invention is capable of transporting a heavy endless track shoe one by one.
We discovered that the root cause of the need to proceed with the process by attaching and detaching materials was that gas fusing workplaces and welding workplaces had become specialized, and materials had to be attached and detached using specialized jigs. , the jig is made common and larger, and this is used as a circulation facility, which can be varied and applied in a variety of ways according to the implementation conditions without changing the gist.

For example, if the circulation path is annular, the effect of the minimum floor area of the above embodiment will be lost, but transfer equipment such as a reciprocating rail platform will become unnecessary. If the amount of repair is large, it is also possible to have several carts with jigs running the process in parallel on a circulation path at all times, or to move them on rails using power or traction.
It is well known that gas cutting and welding can be replaced by plasma jet cutting and welding.

(Effects of the Invention) As a result of research into the special shape of the lug part of a track shoe and its repair work, the present invention was developed by using common jigs for cutting, temporary fixing, and final welding, and by using multiple shoes instead of one piece at a time. By arranging them one by one and making a large jig for continuous fusing and welding, attaching wheels to the jig,
By making it possible to move it to the required position, by having the shoe be installed and removed in one place, and by starting the jig from here and returning it, as mentioned above, it is possible to achieve effective results that would be unimaginable with conventional repair equipment. It has become equipped with various effects.

In particular, this invention greatly reduces the physical labor required to transport, install, and remove heavy shoes one by one in the three processes of wear lag fusing, temporary welding of new lug materials, and final welding. In addition, since the relative position of automatic fusing and welding equipment and the shoe on the jig is always constant, quality and efficiency are improved, which has a great effect on occupational health and productivity.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of an endless track shoe, Figures 2 and 3 are illustrations of fusing and welding equipment in a conventional shoe repair shop, and Figures 4 and 5 are plan and elevation views of an embodiment of the present invention. , FIG. 6 is a front view of an example of a cart with a jig, and FIGS. 7 and 8 are elevational views of the fusing and welding equipment, respectively. 11 is a trolley with a jig, 15 is a rotating jig, 20 is an automatic fusing device, 31 is a manual welding device, 40 is an automatic welding device, and R is a circulation path.

Claims (1)

[Claims] 1. A plate-shaped jig having a portion for positioning and fixing a plurality of shoes by placing their back sides against the surface of the jig so that the lug portions are lined up in a horizontal line with their end surfaces touching each other; A dolly that rotatably supports the jig by a horizontal axis along its surface in a posture in which the plurality of attached shoes are connected horizontally, and this dolly is positioned at the shoe attachment/removal position, the fusing position, the temporary welding position, and the actual welding position. an automatic fusing device installed at the above fusing position to continuously cut off the lug portion of each shoe on the trolley that reaches this position; A manual welding device that temporarily welds new lug material to each shoe on the truck, and an automatic welding device that is installed at the main welding position and continuously welds the temporarily welded parts of each shoe on the truck that has reached this position. A lug repair device for an endless track shoe, comprising: 2. Repair of the lugs of an endless track shoe in the device according to claim 1, the circulation path of which consists of parallel reciprocating straight rails and respective transverse rail platforms connecting the front and rear ends of the reciprocating rails. Device.