JP3739919B2 - Trolley wire room temperature pressure welding equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trolley wire room temperature pressure welding apparatus for connecting ends of two trolley wires to each other and connecting the trolley wires at room temperature.
[0002]
[Prior art]
A conventional trolley wire room temperature pressure welding apparatus includes a pressure welding machine main body, a gripping facility for gripping a trolley wire, and a pressure welding end face processing device on a lifting work table of a work vehicle capable of traveling on a rail (Japanese Patent Publication No. 53). -4922). The main body of the pressure welding machine is provided with a pair of clamps for gripping and pressing the ends of the trolley wires that are abutted, and each of the clamps has a chuck for clamping the trolley wire. The clamp is driven in pressure contact with the drive ram and can be moved back and forth, right and left and up and down with the moving ram to align with the trolley line. The gripping equipment includes a chuck that grips both ends of the trolley wire and a ram that drives the chuck, and holds both sides of the repair portion of the trolley wire. The pressure contact end surface processing equipment consists of a grooving tool that forms circumferential grooves respectively at the pressure contact positions of the ends of the trolley wires arranged between the clamps of the pressure welding machine main body, and twisting that twists the ends with the grooves. With tools.
Thus, the trolley wire repair work by this device is carried out by moving to the work site with a work vehicle, raising the lifting work table, fixing the trolley wire to the gripping equipment, holding the end of the trolley wire with the clamp, After cutting the groove with a cutting tool and twisting it with a cutting tool, the pressure welding machine main body presses each other.
[0003]
[Problems to be solved by the invention]
In the above-mentioned conventional apparatus, the main body of the pressure welding machine is moved by a ram for position adjustment with respect to the trolley wire, so that the drive device for driving the ram becomes larger and complicated, and the weight is heavy, so the maintenance of the trolley wire is increased. In some cases, the load limit of the work table of the work vehicle used for the vehicle may be exceeded. Since the pressure welding work is performed by operating each ram of the pressure welding machine separately, it requires technical skill to finely adjust the position adjustment and adjustment of gripping and pressure welding operations, etc. Variations are likely to occur, the operation procedure is likely to be erroneous, and the work time is also long. In addition, burrs may be sandwiched in the middle of pressure contact, or the trolley wire may be difficult to separate from the chuck that is firmly gripped. It takes a long time to work.
Therefore, the present invention makes the device simple, small, light and easy to handle, can be easily operated by anyone without special skill, shortens the working time, is more robust, and has a gripping force against the trolley wire. It is an object of the present invention to provide a trolley wire room-temperature pressure welding apparatus that is strong and secures burr escape.
[0004]
[Means for Solving the Problems]
In order to solve the above-described problem, in the first invention, a moving caster 8 is provided in the lifting device 1, a pressure welding machine 2 is provided on the lifting device 1, and the pressure welding machine 2 is connected to the trolley wire T that is abutted. Clamps 14 and 15 for gripping the ends with a predetermined gripping force are provided, and the pressure welding machine 2 is provided with a driving device 3 that is separate from the clamp and driven by pressure means. Is provided with a limit switch 21 for detecting the moving length of the movable clamp 15 during the pressure contact, and a pressure switch 4c for detecting the operating pressure so that the pressure welding machine 2 performs a pressure contact operation at a predetermined pressure. 21 and the control device 4 for controlling the driving device 3 based on the signals of the pressure switch 4c are provided, and the operation panel 12 is provided to constitute a trolley wire room temperature pressure welding device.
[0005]
In the second invention, the pressure welding machine 2 includes a groove cutting jig 23 that forms a circumferential groove at the end of the trolley wire held by the clamp, and a cutting tool 24 that twists between the grooves. The grooving jig 23 has a rod 23c that protrudes from the frame body 23a between the opposed parts of the substantially U-shaped frame body 23a provided with the handle 23b and is fitted to a hexagon wrench. The transmission gear 23d is fixed to both ends of the rod 23c in the frame 23a, respectively, and the pair of cutters 23e facing the rod 23c so as to be movable in the axial direction are supported on the rod 23c. A pair of grooving blades are inserted in the front and back with a gap from both sides, and a screw shaft 23f that is screwed into the cutter 23e is rotatably supported on the lower side of the opposing portion of the frame 23a, so that the cutters 23e and 23e are rods. Close to each other, Hansa causes and as, in the screw shaft 23f, to fix the driven gear 23g meshing respectively with the transmission gear 23d.
[0006]
In the third aspect of the invention, the pressure welding machine 2 includes a grooving jig 23 that forms a circumferential groove at the end of the trolley wire held by the clamp, and a cutting tool 24 that twists between the grooves. The twisting tool 24 is constructed such that the one end of a pair of arms 24a is pivotally attached and the angle between the arms 24a can be enlarged and reduced so that the trolley wire T is sandwiched between them. A holding recess 24c having a cross-sectional shape along the outer shape of the trolley wire T is provided at the opposing portion, and a holder 24d that is locked to the other end of one arm 24a is held at the other end so as to hold the trolley wire T sandwiched. Provided.
[0007]
In the fourth invention, the clamps 14 and 15 of the pressure welding machine 2 are driven by the driving device 3 to be opposed to the pair of opposed tool tool chuck steels 17 and 18 for gripping the trolley wire T, and the chucks 17. And a chuck holder 19 for holding the chucks 18, 18 are formed in the opposing portions of the chucks 17, 18 with sawtooth-shaped grooves 17 a, 18 a, and a clearance S for releasing burrs during pressure contact at the tip of the chuck holder 19. And a convex portion 19b projecting forward so as to avoid contact between the chucks 17 and 18 during pressure contact.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to the drawings.
In FIG. 1, the trolley wire room temperature pressure welding apparatus includes a lifting device 1, a pressure welding machine 2, a driving device 3, and a control device 4. The elevating device 1 is placed on the work platform C2 of the work vehicle, and the drive device 3 and the control device 4 are placed on the loading platform C2. As shown in FIGS. 2 to 4, the lifting device 1 includes a lower frame 5, telescopic legs 6, and an upper frame 7. The lower frame 5 is provided with casters 8. A jack 9 fixed to the lower frame 5 is connected to the telescopic leg 6 via an arm 10. When the jack 9 is manually operated and the arm 10 is moved up and down, the rollers at the upper and lower ends of the telescopic legs 6 move along the guide rails of the upper and lower frames 5 and 7 so that the telescopic legs 6 expand and contract.
[0009]
The pressure welding machine 2 and the operation panel 12 are fixed to the upper frame 7. The pressure welding machine 2 is connected to a separate drive device 3 via a hose 13, a control cable 13 a and a control device 4. As shown in FIGS. 5 to 8, the pressure welding machine 2 has a pair of clamps 14 and 15 for fixing the trolley wire T, respectively. One clamp 15 is provided with a pair of parallel press contact cylinders 16 for reciprocating linearly so as to approach and separate from the other fixed clamp 14. The clamps 14 and 15 are a fixed chuck 17 and a movable chuck 18 that face each other so as to sandwich the trolley wire T from the side, a holder 19 that holds and fixes both chucks 17 and 18, and a clamp that reciprocates the movable chuck 18. And a cylinder 20. The chucks 17 and 18 are made of an alloy tool steel for molds and have a cross-sectional shape along the outer shape of the trolley wire T. The chucks 17 and 18 are attachable to and detachable from the holder 19, and different shapes are prepared according to the degree of wear of the trolley wire T. As shown in FIG. 10, the inner surfaces of the chucks 17 and 18 have a sawtooth cross-section for securing the trolley wire T by strengthening the biting of the trolley wire T toward the opposing portion of the clamps 14 and 15. Chuck grooves 17a and 18a are formed. As shown in FIG. 9, when the recesses 19 a recessed from the tips of the chucks 17, 18 and the clamps 14, 15 approach the tip portions of the holders 19, 19 to form a gap S between them at the time of press contact. In order to prevent damage due to contact between the chucks 17 and 18, a protruding portion 19 b is provided. A limit switch 21 is attached to the side of the holder 19. The limit switch 21 senses four different positions in the movable range of the clamp 15 and can grasp the pressure contact operation.
[0010]
A fresh metal material surface is formed on the end portion of the trolley wire T disposed between the clamps 14 and 15 by an end surface processing jig. The end face processing jig includes a grooving jig 23 and a cutting tool 24. As shown in FIGS. 11 and 12, the grooving jig 23 has a rod 23c rotatably mounted on an upper portion of a U-shaped frame 23a having a handle 23b. One end of the rod 23c protrudes from the U-shaped frame 23a, and this protrusion is adapted to fit into a hexagon wrench. Transmission gears 23d and 23d are fixed to both sides of the rod 23c. A pair of cutters 23e, 23e facing each other so as to sandwich the trolley wire T from both sides are supported inside the rod 23c so as to be movable in the axial direction. The cutter 23e has groove cutting blades on the front and rear sides at intervals, and grooves can be formed at two places on the front and rear of the trolley wire with a single attachment. Screw shafts 23f are rotatably supported at lower portions on both sides of the U-shaped frame 23a. Driven gears 23g and 23g that mesh with the transmission gears 23d and 23d are fixed to the screw shaft 23f. The screw shaft 23f is screwed into the cutter 23e, and moves the cutter 23e along the rod 23c by rotating. The screw shaft 23f and the cutter 23e are threaded so that the cutters 23e and 23e move in opposite directions to each other by the rotation of the rod 23c, and approach and separate.
[0011]
In addition, as shown in FIGS. 13 and 14, the cutting tool 24 has one end of a pair of arms 24a and 24a pivotally supported by a pivot pin 24b, and a trolley wire between the arms 24a and 24a. T is inserted. A sandwiching recess 24c having a cross-sectional shape along the outer shape of the trolley wire T is formed in the facing portion inside the arm 24a. The other end of one arm 24a is provided with an annular holder 24d that is engaged with the other arm in order to keep the trolley wire T sandwiched and to reduce the operating force. After grooving, the trolley wire T is twisted by fixing the twisting tool 24 to the trolley wire T and swinging it back and forth.
[0012]
The pressure cylinder 16 and the clamp cylinder 20 are connected by a hose 13 connected to the driving device 3. The drive device 3 is composed of a hydraulic pump. The control device 4 includes a control panel 4a, a valve unit 4b, and a pressure switch 4c. The drive device 3 is driven and controlled by the control device 4 in accordance with the operation of the operation panel 12. A pressure gauge 25 is connected to the hose 13. This pressure gauge 25 can adjust the tensile pressure at the time of a test with the relief valve 25a.
[0013]
As shown in FIG. 15, the operation panel 12 includes a push button type operation start / stop switch 12a, a rotary type operation mode change switch 12b and a press contact number change switch 12c, a push button type hydraulic pump power switch 12d, Both lever-type clamp opening / closing levers 12e and 12f, a pressure contact lever 12g, and a push button type emergency stop switch 12h are provided.
[0014]
Using this trolley wire room temperature pressure welding device, for example, when connecting parallel parts of two trolley wires T parallel to each other at the end and mechanically connected to each other by a double ear to a continuous one Will be described. First, after moving to the work site with a work vehicle, the pressure welding machine 2 and the pressure gauge 25 are placed on the work table C2, the work table C2 is raised, and the pressure welding machine 2 is disposed in the vicinity of the trolley wire T. Fine adjustment of the height position of the pressure welding machine 2 is performed by the lifting device 1. Then, the trolley wires on both sides of the press contact point are respectively fastened by a drawing device (not shown). After marking the pressure contact position near the center where the amount of wear in the parallel part of the trolley wire T is almost equal, disassemble the double ear and shift it from the pressure contact position by the compression allowance necessary for the pressure contact. Cut each with a cutting tool.
[0015]
Next, the hydraulic pump power switch 12d of the operation panel 12 is turned ON, and the operation mode is manually set by the changeover switch 12b. Then, the clamp 15 is moved to the stroke end by the pressure contact lever 12g and separated from the clamp 14. By operating the clamp opening / closing levers 12e and 12f, the chucks 17 and 18 sandwich and hold the end portions of the trolley wires T which are abutted with each other with a predetermined gripping force. At this time, the tip of the trolley wire T is projected to the vicinity of the center between the clamps 14 and 15.
[0016]
Next, the rod 23c of the grooving jig 23 is rotated, the trolley wire T is engaged with the cutter 23e, the handle 23b is held and rotated around the axis of the trolley wire T, and a circumferential groove is formed on the trolley wire T. Form. Then, the trolley wire T is pinched by the holding recess 24c of the cutting tool 24, the holder 24d is hung on the arm 24a and fixed, and the trolley wire T is reciprocated in the circumferential direction of the trolley wire T to twist the trolley wire T from the groove. Cut it.
[0017]
Next, automatic operation of pressure welding work is performed. First, the operation mode is automatically switched by the changeover switch 12b of the operation panel 12, and the desired number of times (usually three times) is selected by the press contact number changeover switch 12c. When the operation start switch 12a is pressed, the clamps 14 and 15 are brought into pressure contact with the cut end surface of the gripped trolley wire T. At this time, the burr generated at the joint portion of the trolley wire T is pushed out through the gap between the tip portions of the chucks 17 and 18 and the holder 19 and the gap S between the concave portions 19a and 19a of the holder 19. Further, even if the clamps 14 and 15 approach and the chucks 17 and 18 come into contact with each other, the convex portions 19b of the holder 19 come into contact with each other. At the time of press contact, the position of the clamp 15 is detected by the limit switch 21, and the pressure of the clamp cylinder 20 and the press contact cylinder 16 is detected by the pressure switch 4c of the control device 4, whereby the control panel 4a in the control device 4 is operated by the valve unit 4b. Then, the driving device 3 is controlled to perform a predetermined appropriate pressure welding operation. If an abnormal operation occurs during automatic operation, the emergency stop button 12h is pressed to stop the operation.
[0018]
After the trolley wire is connected, the operation mode is switched to manual operation with the changeover switch 12b, and then the clamp opening / closing levers 12e and 12f are operated to remove the trolley wire T from the chucks 17 and 18. Then, the burr | flash of the junction part of the trolley wire T is excised with a nipper etc., and the surface is prepared with the file.
[0019]
The pressure welding operation can also be performed manually. In this case, the operation mode may be switched to manual with the changeover switch 12b of the operation panel 12, and the clamp 15 may be moved closer to the clamp 14 by operating the pressure contact lever 12g.
A tensile test is performed to inspect the connection state of the joint as necessary after the completion of the pressure welding. When the operation mode switch 12b of the operation panel 12 is switched to the test and then the operation start switch 12a is pressed, the clamp 15 applies a force in the direction of separating the joint. At this time, the test pressure is adjusted by the relief valve 25 a while looking at the pressure gauge 25.
[0020]
【The invention's effect】
As described above, in the first invention, by using a caster, the moving ram can be omitted, the drive device can be simplified and reduced in size and weight, and it is convenient for handling such as transportation and position adjustment. . By automating the pressure contact operation, no technical skill is required to adjust the adjustment of the operation, anyone can easily operate, the same pressure contact state can be obtained, and the operation procedure can be mistaken In addition, the working time can be further reduced.
In the second invention, if the rod is rotated, the cutter bites into the trolley wire, and if the handle is rotated around the axis of the trolley wire, a circumferential groove is formed in the trolley wire. The grooving for twisting for forming the fresh metal material end face can be easily performed, the working time can be shortened, and a reliable pressure contact state can be obtained in cooperation with the twisting tool.
In the third invention, once the twisting tool is attached to the trolley wire, the trolley wire can be twisted in both directions at the time of twisting, and the operability is good, and it is easily fixed to the trolley wire easily. The twisting force can be transmitted efficiently without detachment, and the load applied to the pivoting portion of the arm is relatively small and is not easily damaged.
In the fourth invention, since the chuck is made of alloy tool steel for molds, it is robust, and since the shape of the chuck groove is serrated, the gripping force is strong in the pressing direction, but when the clamp moves It has the effect that it can be easily separated from the trolley wire, and the chuck holder can avoid damage due to contact between chucks, and the burr at the time of pressure contact can be escaped by the gap space between the stopper and the holder. Have
[Brief description of the drawings]
FIG. 1 is a schematic view of a trolley wire room temperature pressure welding apparatus according to the present invention.
FIG. 2 is a front view of a lifting device of a trolley wire room temperature pressure welding device according to the present invention.
FIG. 3 is a plan view in which a part of the lifting device is cut away.
FIG. 4 is a side view of the lifting device.
FIG. 5 is a side view of the pressure welding machine.
FIG. 6 is a plan view of a pressure welding machine.
FIG. 7 is a front view of the pressure welding machine.
FIG. 8 is a rear view of the pressure welding machine.
FIG. 9 is a front view of the chuck.
FIG. 10 is an enlarged cross-sectional view of a chuck.
FIG. 11 is a perspective view in which a part of the grooving jig is cut away.
FIG. 12 is a longitudinal sectional view of a grooving jig.
FIG. 13 is an exploded perspective view of a twisting jig.
FIG. 14 is a front view of a twisting jig.
FIG. 15 is a plan view of an operation panel.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Lifting apparatus 2 Pressure welding machine 3 Drive apparatus 4 Control apparatus 4a Control board 4b Valve unit 4c Pressure switch 8 Caster 12 Operation panel 13 Hose 13a Control cable 14 Clamp 15 Clamp 16 Pressure welding cylinder 17 Chuck 17a Chuck groove 18 Chuck 18a Chuck groove 19 Holder 19a Concave portion 19b Convex portion 20 Clamp cylinder 21 Limit switch 23 Groove jig 24 Twisting tool C1 Work vehicle bed C2 Work table T Trolley wire

Claims (4)

A lifting device having a caster for movement;
With this lifting device, the vertical position can be changed, and a pressure welding machine provided with clamps for gripping the end portions where the trolley wires are abutted with each other with a predetermined gripping force,
A driving device that is separate from the pressure welding machine and drives the pressure welding machine by pressure means;
A limit switch for detecting the movement length of the clamp at the time of pressure welding of the pressure welding machine;
A pressure switch that detects the operating pressure during pressure contact;
A trolley wire room temperature pressure welding apparatus comprising: a controller for controlling the driving device so that a clamp of the pressure welding machine performs a predetermined pressure welding operation based on signals of a limit switch and a pressure switch. The pressure welding machine includes a grooving jig for forming a circumferential groove at an end of a trolley wire held by a clamp, and a cutting tool for twisting between the mutual grooves,
The grooving jig is rotatably mounted between a substantially U-shaped frame having a handle and an opposing portion of the frame, and one end protrudes from the frame and is fitted to a hexagon wrench. Rods, transmission gears fixed to both ends of the rods in the frame body, and supported by the rods so as to be movable in the axial direction. A pair of opposed cutters, respectively, and a screw shaft that is rotatably supported by lower portions on both sides of the frame body, and that is screwed into the cutter so that the cutters are rotated to approach and separate from each other along the rod; The trolley wire room temperature pressure welding apparatus according to claim 1, further comprising driven gears fixed to the screw shaft and meshing with the transmission gears. The pressure welding machine includes a grooving jig for forming a circumferential groove at an end of a trolley wire held by a clamp, and a cutting tool for twisting between the mutual grooves,
The cutting tool is constructed so that one end of a pair of arms is pivotally attached and the angle between the arms can be enlarged and reduced so that the trolley wire is sandwiched between them. The holding recess that is provided to the other end of one arm is provided at the other end of one arm so as to provide a holding recess having a cross-sectional shape along the trolley wire. Trolley wire room temperature pressure welding equipment. The clamp of the pressure welding machine comprises a pair of chucks made of alloy tool steel for molds opposed to grip the trolley wire, and a chuck holder for holding the chuck,
The opposite part of the chuck has a groove with a sawtooth cross section,
The end of the chuck holder protrudes forward from the chuck so as to avoid a contact between the recessed portion recessed from the chuck so as to form a clearance for releasing burrs between the chuck holder and the chuck during pressing. The trolley wire room temperature pressure welding apparatus according to claim 1, further comprising a convex portion.

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