JP2014172461A - Wheel tread cleaning device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance durability of a spring in a wheel tread cleaning device.SOLUTION: A polishing element 30, which detachably attached to a polishing element bearing 40, comprises: a body part 45 for supporting a fitting part 32 of the polishing element 30; a hollow projection cylindrical part 50 which projects from the body part 45 and is inserted in the fitting part 32; a pair of openings 51, 52 which open on both sides of the projection cylindrical part 50; a pair of hooks 61, 62 projecting from the openings 51, 52; a spring 90 for energizing the hooks 61, 62 in a direction projecting from the openings 51, 52; and a pin 80 (regulation member) which is provided in the projection cylindrical part 50 and regulates movement of the spring 90 in a direction such that the spring 90 approaches body part 45.

Description

  The present invention relates to a wheel tread cleaning device that presses an abrasive against a wheel tread during traveling of a railway vehicle to remove dust and the like adhering to the wheel tread.

  Patent Document 1 discloses a wheel tread including a cylinder attached to a railway vehicle, a rod protruding from the cylinder by air pressure supplied into the cylinder, and an abrasive attached to the rod and pressed against the tread of the wheel. A cleaning device is disclosed.

  A polishing blade receiver is provided at the tip of the rod, and the polishing blade is detachably attached to the polishing blade receiver. The abrasive receiver is provided with a hook protruding by the spring force of the spring, and the abrasive is prevented from coming off by this hook.

JP 2002-331933 A

  However, in such a conventional wheel tread cleaning device, for example, it is structured to receive the removal load of the abrasive at the shoulder portion of the hook, but if the spring and hook are misaligned for some reason, the removal load May be applied not only to the hook shoulder but also to the spring, which may impair the durability of the spring.

  The present invention has been made in view of the above problems, and an object of the present invention is to increase the durability of a spring in a wheel tread cleaning device.

  The present invention relates to a wheel tread cleaning device that presses a polishing element that is detachably attached to a polishing element receiver against a tread surface of the wheel, the polishing element receiver including a main body part that supports the attachment part of the polishing element, and a main body part. A hollow projecting cylinder part that protrudes and is inserted into the mounting part, a pair of opening parts that open on both sides of the projecting cylinder part, a pair of hooks that project from the opening part, and a hook projecting from the opening part. And a restricting member that is provided inside the projecting cylindrical portion and restricts the spring from moving in a direction approaching the main body portion.

  In the present invention, since the movement of the spring approaching the main body with the hook projecting from the opening is restricted by the restriction member, it is avoided that the spring is stuck in a state of being displaced closer to the main body. Thereby, since the attitude | position of a hook is maintained, it is prevented that a hook is strongly pressed against a spring, and durability of a spring is improved.

It is sectional drawing of the wheel tread cleaning apparatus which concerns on embodiment of this invention. It is sectional drawing of the abrasive receiver which concerns on embodiment of this invention. It is a top view of the abrasive receiver according to the embodiment of the present invention. FIG. 4 is a cross-sectional view of the abrasive receiver along line AA in FIG. 3 according to the embodiment of the present invention. It is sectional drawing which shows the action | operation state of the abrasive receiver in a comparative example. It is sectional drawing which shows the operation state of the abrasive receiver which concerns on embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 1, the wheel tread cleaning device 100 is attached to a bogie (not shown) of a railway vehicle, and presses the abrasive 30 against the wheel tread 9 to remove dust, gravel, etc. attached to the tread 9. To be cleaned.

  The wheel tread cleaning device 100 includes a hollow cylinder 10 attached to a carriage, a hollow rod 19 slidably inserted into the cylinder 10, and a pressure chamber defined between the cylinder 10 and the rod 19. 14, a return spring 18 that urges the rod 19 in the direction in which the rod 19 is pulled into the cylinder 10, an abrasive receiver 40 provided at the tip 20 of the rod 19, and an abrasive 30 that is detachably attached to the abrasive receiver 40. And comprising.

  1 and 2, the line O is the central axis of the cylinder 10 and the rod 19. The wheel tread cleaning device 100 is attached to the carriage such that the central axis O extends in a substantially horizontal direction.

  During the cleaning operation, the supply / discharge port 13 of the cylinder 10 is communicated with an air pressure source (not shown). Thus, pressurized air is supplied from the supply / discharge port 13 to the pressure chamber 14, the rod 19 moves in the axial direction (rightward in FIG. 1) against the return spring 18, and the abrasive 30 is moved. It is pressed against the tread surface 9 of the wheel. When the abrasive 30 is in sliding contact with the tread surface 9 of the rotating wheel, rust, dust, gravel, etc. attached to the tread surface 9 are removed.

  At the end of the cleaning operation, the supply / discharge port 13 of the cylinder 10 communicates with the drain (external). Thereby, as the air in the pressure chamber 14 is discharged to the outside through the supply / exhaust port 13, the rod 19 is moved in the axial direction (leftward in FIG. 1) by the spring force of the return spring 18, The abrasive 30 is separated from the tread surface 9 of the wheel.

  The abrasive 30 includes a resin lining 31 that is in sliding contact with the tread surface 9 of the wheel, and a metal attachment portion 32 that is coupled to the lining 31. As will be described later, the attachment portion 32 is detachably attached to the abrasive receiver 40.

  As shown in FIGS. 2 and 3, the abrasive receiver 40 includes a connecting portion 41 connected to the rod 19, a main body portion 45 that supports the mounting portion 32 of the abrasive 30, and a protrusion protruding from the main body portion 45. And a protruding cylinder portion 50 inserted into the mounting holes 34 of the 30. Although the connection part 41, the main-body part 45, and the protrusion cylinder part 50 are mutually couple | bonded by welding, it is good also as a structure integrally formed with each other not only this.

  The connecting portion 41 has a bracket shape with a U-shaped cross section, and the tip portion 20 of the rod 19 is interposed inside the connecting portion 41. The tip portion 20 of the rod 19 has a pair of bracket holes 29 and is fastened to the connecting portion 41 via the two bolts 21 and the nut 28.

  Between the inner periphery of the bracket hole 29 of the rod 19 and the outer periphery of the bolt 21, an annular vibration isolating rubber 22 is interposed. A stepped main body 23 and a disc spring 25, and a stepped main body 24 and a disc spring 26 are interposed between both ends of the vibration isolating rubber 22 and the connecting portion 41, respectively.

  The main body 45 of the abrasive receiver 40 is formed in a rectangular plate shape. The protruding cylindrical portion 50 of the abrasive receiver 40 protrudes in the left-right direction (horizontal direction) from the side surface 44 of the main body portion 45. However, the present invention is not limited to this, and the protruding cylindrical portion 50 of the abrasive receiver 40 may protrude upward from the upper surface of the main body 45.

  The attachment portion 32 of the abrasive 30 is formed in a box-like frame shape that fits into the main body 45 of the abrasive receiver 40. The attachment portion 32 has an abutment plate 33 that abuts against the side surface 44 of the main body portion 45, and an attachment hole 34 that passes through the protruding cylindrical portion 50 opens in the abutment plate 33.

  At the time of attaching the polishing element 30, the attachment part 32 of the polishing element 30 is fitted into the main body 45 of the polishing element receiver 40, and the attachment hole 34 of the polishing element 30 is inserted into the protruding cylindrical part 50 of the polishing element receiver 40. As a result, a load in a direction other than the pulling direction acting on the abrasive 30 is supported by the abrasive receiver 40.

  The abrasive receiver 40 is provided with a mechanism for preventing the abrasive 30 from coming off, and the retainer mechanism locks the abrasive 30 from moving in the removal direction with respect to the protruding cylindrical portion 50, so that the abrasive 30 acts on the abrasive 30. A load in the direction is supported by the abrasive receiver 40. Hereinafter, this retaining mechanism will be described.

  As shown in FIG. 4, the mechanism for retaining the abrasive receiver 40 includes a protruding cylinder portion 50, a pair of hooks 61 and 62 that protrude from the openings 51 and 52 of the protruding cylinder portion 50, and the hook 61. , 62 for urging the projection 62 in the protruding direction.

  The protruding cylindrical portion 50 is formed in a hollow cylindrical shape that extends in the mounting direction of the abrasive 30. The protruding cylinder part 50 has a pair of side wall parts 57 extending in the attaching direction of the polishing element 30 and a pair of end wall parts 58 extending in a direction orthogonal to the side wall part 57.

  A pair of openings 51 and 52 are formed in both side wall portions 57 of the protruding cylinder portion 50. The slit-shaped openings 51 and 52 extend in the attaching direction of the abrasive 30, and the front-side open ends 53 and 54 on the side far from the main body 45 at both ends and the back-side open ends 55 on the side close to the main body 45. , 56.

  The hooks 61, 62 protrude from the openings 51, 52 and engage with the attachment portion 32 of the abrasive 30, and receiving portions 65, 66 accommodated inside the protruding cylinder portion 50, Have The thickness of the engaging portions 63 and 64 is smaller than the opening width of the opening portions 51 and 52. The thickness of the accommodating parts 65 and 66 is formed larger than the opening width of the opening parts 51 and 52. The hooks 61, 62 have step portions 69, 70 between the engaging portions 63, 64 and the accommodating portions 65, 66, and the step portions 69, 70 come into contact with the inner wall of the protruding cylinder portion 50, thereby 62 are prevented from coming out of the openings 51 and 52 any more.

  The spring 90 is formed by bending a linear spring material. The spring 90 is spirally wound around the coil portion 91, a pair of leg portions 92 and 93 extending from the coil portion 91 in the tangential direction, and bent from the leg portions 92 and 93 and coupled to the hooks 61 and 62. A pair of end portions 94, 95.

  The hooks 61 and 62 are formed with mounting holes 67 and 68 into which the end portions 94 and 95 of the spring 90 are inserted, and engagement grooves 71 and 72 that engage with the leg portions 92 and 93 of the spring 90. .

  Convex bottom portions 73 and 74 having a convex cross section are formed at the bottoms of the engaging grooves 71 and 72, and the convex bottom portions 73 and 74 abut against the leg portions 92 and 93 of the spring 90. As a result, when the hooks 61 and 62 are pushed into the openings 51 and 52 (see FIG. 6), the spring 90 contracts via the legs 92 and 93 engaged with the engagement grooves 71 and 72. ing.

  The hooks 61 and 62 have base end portions 75 and 76 extending in the vertical direction in a state where the engaging portions 63 and 64 protrude from the openings 51 and 52 by the urging force of the spring 90 (see FIG. 4), and also in the vertical direction. And tip portions 77 and 78 extending in the direction.

  The opening width H1 in the fitting direction (longitudinal direction) of the openings 51 and 52 is formed larger than the width H2 of the hooks 61 and 62.

  The abrasive receiver 40 includes a pin 80 that penetrates the inside of the coil portion 91 of the spring 90 inside the protruding cylindrical portion 50. The pin 80 is provided as a restricting member that restricts the spring 90 from moving in a direction approaching the main body 45 with respect to the openings 51 and 52.

  Both ends of the pin 80 are supported by the end wall portions 58 of the protruding cylindrical portion 50. The pin 80 has a male screw (not shown) formed at one end thereof, and the male screw is screwed into a female screw (not shown) formed on one end wall portion 58 and fastened. The pins 80 are provided so that both ends thereof do not protrude from the outer surface of each end wall portion 58. In addition, it is good also as a structure fastened using the nut screwed together with the external thread of the pin 80 not only in this.

  As shown in FIG. 4, when the outer periphery of the pin 80 comes into contact with the inner periphery of the coil portion 91, the hooks 61 and 62 are pulled away from the main body portion 45 through the openings 51 and 52.

  FIG. 5 shows a comparative example in which the pin 80 is not provided. When the spring 90 is shifted downward in FIG. 5 for some reason, the base end portions 75 and 76 of the hooks 61 and 62 are opened on the front side of the openings 51 and 52. Since they are separated from the ends 53, 54, when the load from the abrasive 30 acts on the hooks 61, 62 as indicated by the arrow C, the hooks 61, 62 rotate as indicated by the arrow D. As a result, the hooks 61 and 62 come into contact with the leg portions 92 and 93 of the spring 90 so that the leg portions 92 and 93 are bent, the leg portions 92 and 93 are worn, and the durability of the spring 90 is impaired. there is a possibility.

  As a countermeasure, a pin 80 is provided on the protruding cylindrical portion 50 of the abrasive receiver 40. When the outer periphery of the pin 80 comes into contact with the inner peripheral portion of the coil portion 91, the movement of the spring 90 toward the main body portion 45 is restricted. Thereby, it is avoided that the spring 90 and the hooks 61 and 62 are fixed to the protruding cylindrical portion 50 in a state of being displaced in the removal direction.

  In the present embodiment, the outer periphery of the pin 80 abuts on the inner periphery of the coil portion 91, so that the base end portions 75 and 76 of the hooks 61 and 62 contact the front opening ends 53 and 54 of the openings 51 and 52. Touch. In this way, the spring 90 and the hooks 61 and 62 are supported by the pin 80 and the projecting cylindrical portion 50 at three locations, so that the tip portions 77 and 78 of the hooks 61 and 62 extend horizontally as shown in FIG. The tip portions 77 and 78 of the hooks 61 and 62 are separated from the rear opening ends 55 and 56 and face the contact plate 33 of the polishing element 30 with a gap.

  Not limited to the above-described configuration, the pin 80 restricts the movement range of the spring 90, so that the proximal end portions 75 and 76 of the hooks 61 and 62 are close to the front opening ends 53 and 54 of the opening portions 51 and 52. However, the front opening ends 53 and 54 may be opposed to each other with a small gap.

  In the engaged state shown in FIG. 4, when a load that pushes the abrasive 30 in the removal direction is applied, the contact plate 33 of the abrasive 30 that is about to move in the removal direction is the tip portions 77 and 78 of the hooks 61 and 62. The abrasive 30 is prevented from coming off. At this time, the hooks 61 and 62 are sandwiched between the front side opening ends 53 and 54 of the openings 51 and 52 and the contact plate 33 of the abrasive 30, so that the tip portions 77 and 78 of the hooks 61 and 62 are horizontal. It is held in a predetermined posture that extends.

  As shown in FIG. 6, when the abrasive 30 is replaced, the hooks 61 and 62 are pushed into the openings 51 and 52 against the spring 90 by the operator. At this time, the hooks 61 and 62 come close to each other while rotating inside the openings 51 and 52, and the spring 90 is elastically deformed by the coil portion 91 and the leg portions 92 and 93 approach each other and contract. Thus, when the hooks 61 and 62 are pushed into the openings 51 and 52, the spring 90 moves away from the pin 80 as shown by the arrow B in the direction of removal. Since the pin 80 does not interfere with the movement of the spring 90, the hooks 61 and 62 contract the spring 90 and are pushed into the openings 51 and 52 smoothly.

  According to the above embodiment, there exists an effect shown below.

  [1] The abrasive receiver 40 is formed of a pair of openings 51 and 52 that open on both sides of the hollow protruding cylindrical portion 50, and protrudes from the openings 51 and 52 so as to face the mounting portion 32. A pair of hooks 61, 62 for retaining them, a spring 90 for urging the hooks 61, 62 in a direction to protrude from the openings 51, 52, and a spring 90 provided inside the protruding cylinder portion 50 are attached to the main body 45. And a regulating member (pin 80) that regulates movement in the approaching direction. For this reason, for example, even when snow or ice enters the inside of the protruding cylinder portion 50, it is avoided that the spring 90 is fixed in a state of moving in the direction approaching the main body portion 45. Accordingly, the postures of the hooks 61 and 62 are maintained, the hooks 61 and 62 are prevented from being strongly pressed against the spring 90, and the durability of the spring 90 is enhanced.

  [2] The spring 90 includes a spirally extending coil portion 91 and both end portions 94 and 95 connected to the pair of hooks 61 and 62, and the restricting member penetrates the inside of the coil portion 91 to form the coil portion. The pin 80 is in contact with the inner periphery of 91. For this reason, when the pin 80 is disposed inside the coil portion 91, the spring 90 is prevented from falling off.

  [3] When the pin 80 is in contact with the coil portion 91, the hooks 61 and 62 are separated from the back side opening ends 55 and 56 on the side close to the main body 45 of the openings 51 and 52, and the openings 51 and 52. The front side open ends 53 and 54 on the side far from the main body 45 are configured to contact. For this reason, the hooks 61 and 62 come into contact with the front side open ends 53 and 54 on the side farther from the main body 45 of the openings 51 and 52, and the hooks 61 and 62 are held. It is possible to prevent the hooks 61 and 62 from being largely rotated, and to prevent the hooks 61 and 62 from being strongly pressed against the spring 90.

  The restricting member is not limited to the pin 80, and a member having another shape may be used. For example, the restricting member may be a protrusion that protrudes integrally from the inner wall surface of the protruding cylinder portion 50.

  The embodiment of the present invention has been described above, but the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

DESCRIPTION OF SYMBOLS 30 Abrasive element 32 Attaching part 40 Abrasive element receiver 45 Main body part 50 Projecting cylinder part 51, 52 Opening part 53, 54 Front side opening end 55, 56 Back side opening end 61, 62 Hook 80 Pin (regulating member)
90 Spring 91 Coil part 94, 95 Both ends

[1] The abrasive receiver 40 is formed of a pair of openings 51 and 52 that open on both sides of the hollow protruding cylindrical portion 50, and protrudes from the openings 51 and 52 so as to face the mounting portion 32. A pair of hooks 61, 62 for retaining them, a spring 90 for urging the hooks 61, 62 in a direction to protrude from the openings 51, 52, and a spring 90 provided inside the protruding cylinder portion 50 are attached to the main body 45. And a regulating member (pin 80) that regulates movement in the approaching direction. Therefore, scan pulling 90 is prevented from being fixed in a state of being moved toward the main body portion 45. Accordingly, the postures of the hooks 61 and 62 are maintained, the hooks 61 and 62 are prevented from being strongly pressed against the spring 90, and the durability of the spring 90 is enhanced.

Claims (3)

A wheel tread cleaning device that presses a polishing element removably attached to a polishing pad receiver against a tread of a wheel,
The abrasive receiver is
A main body for supporting the mounting portion of the abrasive;
A hollow projecting cylindrical portion that protrudes from the main body and is inserted into the mounting portion
A pair of openings that open on both sides of the projecting cylinder;
A pair of hooks protruding from the opening;
A spring for biasing the hook in a direction protruding from the opening;
A wheel tread cleaning device, comprising: a regulating member provided inside the projecting cylinder portion and regulating movement of the spring in a direction approaching the main body portion. The spring includes a coil portion extending in a spiral shape and both ends connected to the pair of hooks,
The wheel tread cleaning device according to claim 1, wherein the restricting member is a pin that penetrates the inside of the coil portion and contacts the inner periphery of the coil portion.   In a state where the pin is in contact with the coil portion, the hook is separated from the rear opening end on the side close to the main body portion of the opening, and the front opening end on the side farther from the main body portion of the opening portion. The wheel tread cleaning device according to claim 2, wherein the wheel tread cleaning device is configured to abut against the wheel tread.

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