JP5615079B2 - Rail head surface grinding machine - Google Patents

Description

  The present invention relates to a rail rectifier that corrects the top surface of a rail using a grinding belt, and particularly suitable for correcting undulations on the rail top surface that cause noise. It is.

  As a rail correction device, an endless grinding belt stretched between a pair of rotating drums is provided along a longitudinal direction of the rail on a carriage traveling on the rail, and the grinding belt is pressed by a pressing means and the rail There is known a structure in which the top surface of the head is corrected (for example, Patent Document 1).

JP 2003-53655 A

  The pressing means of the conventional example presses a face plate having a plane having a required area against a grinding belt to obtain a work surface, and the pressing surface forms a flat surface that does not necessarily coincide with the top surface of a gently curved surface. A positive result cannot always be obtained. Further, in the conventional example, since the work surface is constituted by a pressing surface having a flat surface, the load becomes large and the support for the grinding work is easily achieved.

  The present invention was devised for the purpose of providing an apparatus capable of efficiently performing the correction work while avoiding the drawbacks of the conventional example.

A carriage traveling on a rail is provided with an endless grinding belt stretched between a pair of rotating drums arranged side by side in the longitudinal direction of the rail, and the grinding belt is pressed against the top surface of the rail by a pressing means. A plurality of pressing rollers are juxtaposed along the moving direction of the grinding belt, and the outer peripheral side surface of the roller is partially overlapped with each other in the moving direction to match the cross-sectional shape of the top surface of the rail. And a pressing portion that presses the grinding belt against the top surface of the rail. The grinding portion is recessed from the pressing portion and is horizontal or inclined according to a cross-sectional shape of the top surface of the rail, and A non-pressing portion for pressing the grinding belt in a state where the belt is not pressed against the top surface of the rail is provided .

According to the present invention, the plurality of pressing rollers are configured to press the grinding belt at the partially provided pressing portion to correct the rail and correct the entire rail top surface. It is possible to reliably prevent erroneous work due to the occurrence of the above loads and to provide a correction device with excellent correction accuracy. In addition, a non-pressing part that pushes the grinding belt in a state where it is recessed from the pressing part, is horizontal or inclined according to the cross-sectional shape of the rail top surface, and the grinding belt is not pressed against the rail top surface For example, when the upstream pressing roller with respect to the moving direction of the grinding belt grinds the top surface of the rail at the pressing portion, the non-pressing portion of the upstream pressing roller does not press the grinding belt against the top surface of the rail. Until then, it is pushed in a horizontal or inclined state from the back side of the grinding belt according to the cross-sectional shape of the top surface of the rail. Therefore, the non-pressing part of the upstream pressing roller guides the grinding belt in a state of being horizontal or inclined with respect to the pressing part of the next downstream pressing roller according to the cross-sectional shape of the top surface of the rail. Compared with the case where the grinding belt is not guided by the non-pressing portion of the pressing roller, the load can be reduced by that much and the cutting accuracy can be improved.

A simplified front view. FIG. 2 is an enlarged view of a part of FIG. FIG. Partially enlarged side view. FIG. 5 is a partially enlarged view of FIG. 4. Xx sectional view taken on the line of FIG. The schematic front view at the time of cutting work.

  The drawings show an embodiment of a rail grinding apparatus according to the present invention. In the figure, 1 is a pair of wheels 2 and 2 respectively arranged at both ends in the length direction, and runs freely on the rail R. An apparatus main body 4 supported by a pair of upper and lower support arms 3 and 3 arranged side by side at both ends in the length direction is provided on one side of the carriage 1 along the length direction.

  Rotating drums 5 and 5 'are pivotally attached to both sides of the apparatus main body 4 in the longitudinal direction, and a grinding belt 6 for correcting the top surface Ra of the rail R is attached to the rotating drums 5 and 5'. To stretch.

  The grinding belt 6 connects the one rotating drum 5 to a drive motor 8 mounted on the apparatus main body 4 via a belt transmission device 7, and moves along the longitudinal direction of the rail using the drive motor 8 as a power source.

  Inside this grinding belt 6 (the part surrounded by the endless belt-like grinding belt 6), a long support 9 is arranged in the rail longitudinal direction, and the support 9 is passed through a middle portion in the longitudinal direction. A pair of support arms 12, 12.12 ', 12' are attached to the ends of the supports 10, 10 and the base is pivotally attached to the apparatus body 4 by the pivot shaft 11. By operating the connecting pieces 13 and 13 that are assembled to the apparatus main body 4 and provided continuously through the one support arm 12 on one side of the apparatus main body 4, the apparatus closes and separates from the rail R. It is.

  The connecting piece 13 connects the base 11 to the support arm 12 at the base, and connects the distal ends on the free end side to each other via the intermediate piece 14, while the end of the chain 15 is attached to the distal end. As the chain 15 moves, it swings (turns) about the pivot 11.

  The chain 15 meshes with a sprocket 17 connected to a rotation shaft of a second drive motor 16 mounted on the apparatus body 4 and moves in a direction along the longitudinal direction as the sprocket 17 rotates (in FIG. 1). (The amount of movement is detected by the grinding amount detection device 18 and transmitted to the control device). That is, in FIGS. 1 and 2, when the sprocket 17 is rotated in the clockwise direction by the driving of the second drive motor 16, the chain 15 moves to one side in the longitudinal direction of the rail R, to the left in the drawing, and as a result. The connecting piece 13 swings counterclockwise about the pivot 11, and the support arm 12 integrated with the pivot 11 also rotates counterclockwise. As a result, the support arm 12 moves toward the distal end side of the support arm 12. The arranged support 10 lifts the support 9, and the support 9 moves in a direction away from the rail R. Each member that drives the second drive motor 16 in the opposite direction to the drive returns to the original position, and further rotates the second drive motor 16 in the opposite direction to rotate the sprocket 17 in the counterclockwise direction. Then, the chain 15 moves to the other side in the longitudinal direction of the rail R, to the right in the drawing of FIG. 1, and as a result, the connecting piece 13 swings in the clockwise direction around the pivot 11. The support arm 12 integrated with the support arm 12 also rotates in the clockwise direction. As a result, the support 10 disposed on the distal end side of the support arm 12 lowers the support body 9 and the support body 9 approaches the rail R. It moves in the direction.

  Such proximity and separation operations of the support 9 with respect to the rail R appear as the cutting depth of the rail R of the grinding belt 6 pressed by the pressing rollers 19A, 19B, and 19C assembled to the support 9. In the example, the cutting depth (cutting) amount is detected by the cutting amount detection device 18 (potentiometer) as the movement amount of the chain 15 and transmitted to the control device, and the cutting operation is performed according to a preset program. Is done.

  The first and second pressing rollers 19A, 19B, and 19C are arranged on a roller frame 20 stretched at the center in the longitudinal direction of the support 9 so as to be freely rollable in the advancing and retreating direction of the carriage 1. The pressing portion 22A having pressing surfaces 22A ′, 22B ′, and 22C ′ that coincide with a part of the cross-sectional shape in the width direction of the rail top surface Ra that is the object to be ground. , 22B, 22C partially projecting.

  The pressing surface 22A ′ of the pressing portion 22A of the first pressing roller 19A coincides with the portion Ra ′ on one side along the rail longitudinal direction of the cross-sectional shape of the rail top surface Ra, and the pressing surface of the second pressing roller 19B. The pressing surface 22B ′ of the portion 22B coincides with the central portion Ra ″ along the rail longitudinal direction of the cross-sectional shape in the width direction of the rail top surface Ra, and the pressing surface of the pressing portion 22C of the third pressing roller 19C 22C 'is a first to third pressing roller that coincides with a portion Ra "' on the other side along the rail longitudinal direction of the cross-sectional shape in the width direction of the rail top surface Ra and overlaps in the front-rear direction (rail longitudinal direction). The projected shapes formed by the pressing surfaces 22A ′, 22B ′, and 22C ′ of 19A, 19B, and 19C are made to coincide with the form of the rail top surface Ra (FIG. 5).

  Although the embodiment uses three pressing rollers 19A, 19B, 19C, there is no problem with two or four or more. In short, the projected shape is the shape of the rail top surface Ra as described above. As in the embodiment, the plurality of pressing rollers may not be close to each other (in an arrangement relationship in which the rail top surface Ra is continuously pressed), and the pressing surfaces 22A ′, 22B ', 22C' (pressing portions 22A, 22B, 22C or pressing rollers 19A, 19B, 19C) can be arranged in any order.

Then, the driving motor 8 is driven to rotate and move the grinding belt 6 stretched on the rotary drums 5 and 5 ′, and the second driving motor 16 is driven to move the support 9 (the roller frame 20) in the rail R direction. By pressing the grinding belt 6 with the pressing rollers 19A, 19B, and 19C against the rail head top surface (cutting front surface) Ra close to the rail top surface Ra, the rail top surface Ra is ground and the wavy wear is removed. The rail head top surface is ground and changed gradually.

1 Cart 5, 5 'Rotating drum 6 Grinding belt 19A, 19B, 19C Pressing roller 22A, 22B, 22C Pressing part R Rail Ra Top surface

Claims (1)

A carriage traveling on a rail is provided with an endless grinding belt stretched between a pair of rotating drums arranged side by side in the longitudinal direction of the rail, and the grinding belt is pressed against the top surface of the rail by a pressing means. A plurality of pressing rollers are juxtaposed along the moving direction of the grinding belt, and the outer peripheral side surface of the roller is partially overlapped with each other in the moving direction to match the cross-sectional shape of the top surface of the rail. And a pressing portion that presses the grinding belt against the top surface of the rail. The grinding portion is recessed from the pressing portion and is horizontal or inclined according to a cross-sectional shape of the top surface of the rail, and A rail head top surface correcting device , comprising a non-pressing portion for pressing the grinding belt in a state where the belt is not pressed against the head top surface of the rail.

Images