Rail grinding equipment

Abstract

To re-profile rails so that there is no difference in the degree of finish or work efficiency when re-profiling rails, especially creaks at gauge corners, etc., regardless of the skill level of an operator.SOLUTION: A rail re-profiling device is equipped with: a truck body 12 provided with wheels rolling on right and left rails R, R; a right and left direction slide mechanism unit 13 provided on the truck body 12 and provided with a slider 13b sliding in a right and left direction orthogonal to the right and left rails R, R on a slide table 13a; a grinder-holding / angle changing mechanism unit 14 to which a disk grinder 11 for rotating a rotary grinding wheel 11b is attached and which can change the angle of the disk grinder 11 by turning around a turning shaft 14a parallel to the longitudinal direction of the rails R, R; and an elevating mechanism unit 15 provided on the slider 13b of the right and left direction slide mechanism unit 13 and elevating the grinder-holding / angle changing mechanism unit 14 in a Y-axis direction as a vertical direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a rail grinding device that grinds rails, and in particular to a rail grinding device that is suitable for grinding rail creaks or creak cracks that occur at gauge corner portions, which are corners of the rail head on which train wheels run. [Background technology]

[0002] As trains pass over railway rails, rolling contact fatigue between the rail and wheels causes the metal on the surface of the gauge corners, which are the corners of the head of the rail, to plastically flow in the anti-train direction, resulting in plastic deformation. When this plastic deformation reaches its limit, minute, regular crack-like fissures appear, and workers grind them down using a handy grinder or similar (see, for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-17135 Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a worker uses a handy grinder to grind rails as in the invention described in Patent Document 1, there is a problem in that the quality of the finish and work efficiency vary depending on the worker's level of skill.

[0005] The present invention has been made with a focus on such problems, and aims to provide a rail grinding device that can grind rails without causing any difference in the finish quality or work efficiency when grinding rails, particularly creaks in gauge corners, regardless of the skill level of the worker. [Means for solving the problem]

[0006] In order to solve the above problems, the rail grinding device of the present invention comprises a carriage body provided with wheels that roll on left and right rails, a left-right sliding mechanism provided on the carriage body and provided with a slider that slides on a slide table in the left-right direction perpendicular to the left and right rails, a grinder holding and angle changing mechanism provided with a disk grinder that rotates a rotary grindstone and is capable of changing the angle of the disk grinder by rotating about a rotation axis that is parallel to the longitudinal direction of the rail, and a lifting mechanism provided on the slider of the left-right sliding mechanism and lifting the grinder holding and angle changing mechanism in the Y-axis direction, which is the up-down direction. the lifting mechanism comprises: a threaded rod support section that is erected on the slider, extends in a vertical direction, and rotatably supports a threaded rod having an upper end provided with a rotating handle for an operator to grasp and turn; and a lifting body having one end to which the grinder holding and angle changing mechanism section is attached and the other end provided with a lifting nut that is screwed onto the threaded portion of the threaded rod to lift and lower it; the lifting body comprises: a grinder holding and angle changing mechanism section mounting plate to which the grinder holding and angle changing mechanism section is attached; a lifting nut mounting plate to which the lifting nut is attached; a pair of connecting plates that connect the grinder holding and angle changing mechanism section mounting plate and the lifting nut mounting plate; and a cross-shaped reinforcing plate that connects the grinder holding and angle changing mechanism section mounting plate, the lifting nut mounting plate, and the inner surfaces of the pair of connecting plates and is disposed so as to intersect in a cross shape in a plan view. The present invention is characterized by having the following. Furthermore, the rail grinding device of the present invention is characterized in that a rod-shaped handle is provided on the opposite side of the lifting mechanism of the slider, extending in the vertical direction higher than the height of the rotating handle and for gripping by an operator. In addition, in the rail grinding device according to the present invention, the carriage body is provided with wheels that roll on the left and right rails, a left-right direction slide mechanism provided on the carriage body and provided with a slider that slides on a slide table in the left-right direction perpendicular to the left and right rails; a grinder holding / angle changing mechanism to which a disk grinder that rotates a rotary grinding wheel is attached and which can change the angle of the disk grinder by rotating about a rotation axis parallel to the longitudinal direction of the rails; and a lifting mechanism provided on the slider of the left-right direction slide mechanism for lifting and lowering the grinder holding / angle changing mechanism in the Y-axis direction, which is the up-down direction; The disc grinder is Side handle From the female screw hole where Its side handle and attaching the rotating shaft to its female screw hole. In addition, in the rail grinding device according to the present invention, Further, a grinder power switch holding mechanism is provided, which has an eccentric cam switch having an eccentric rotating shaft and rotating about the eccentric rotating shaft to keep the power switch of the disk grinder in an on state. It is also characterized by the following. Effect of the Invention

[0007] The rail grinding device of the present invention comprises a carriage body, a left-right sliding mechanism provided on the carriage body and having a slider that slides in the left-right direction on a slide table perpendicular to the left and right rails, a grinder holding and angle changing mechanism capable of changing the angle of a disc grinder, and a lifting mechanism provided on the slider of the left-right sliding mechanism for raising and lowering the grinder holding and angle changing mechanism in the up-down Y-axis direction. Therefore, for example, even when grinding down the so-called creaking of the rail head at a gauge corner, the grinding angle and grinding amount can be kept constant by the grinder holding / angle changing mechanism and the left / right sliding mechanism, so that it is possible to grind down the rail without any difference in the finish quality or work efficiency when grinding down the rail, especially the creaking of the gauge corner, regardless of the skill level of the worker. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a front view of a rail grinding device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is an enlarged front view of essential parts such as a lifting mechanism and a left-right sliding mechanism in a rail grinding device according to an embodiment of the present invention. [Diagram 3] FIG. 1 is a plan view of a rail grinding device according to an embodiment of the present invention. [Figure 4] FIG. 2 is an enlarged front view of essential parts such as a lifting mechanism and a left-right sliding mechanism in a rail grinding device according to an embodiment of the present invention. [Diagram 5] FIG. 1 is a left side view of a rail grinding device according to an embodiment of the present invention. [Figure 6] FIG. 2 is a right side view of the rail grinding device according to the embodiment of the present invention. [Figure 7] FIG. 2 is an enlarged front view of essential parts such as a grinder holding / angle changing mechanism and a grinder in a rail grinding device according to an embodiment of the present invention. [Figure 8] FIG. 2 is an enlarged front view of essential parts such as a grinder power supply switch holding mechanism attached to a disc grinder in the rail grinding device according to the embodiment of the present invention. [Figure 9] 9(a) and 9(b) are cross-sectional views taken along line AA in FIG. 8, and are end views showing a state in which the power switch (SW) is turned off and on by an eccentric cam switch of a grinder power switch holding mechanism part attached to a disc grinder in a rail grinding device according to an embodiment of the present invention. [Figure 10]FIG. 1 is an enlarged view showing a state in which a grinder holding / angle changing mechanism of a rail grinding device according to an embodiment of the present invention is holding a disc grinder and changing the angle while grinding a gauge corner of a rail. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] A rail grinding device 1 according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. Note that the embodiment described below is merely one example of the present invention, and the present invention is not limited to the following embodiment, and can be modified as appropriate within the scope of the technical concept of the present invention.

[0010] <Configuration of the rail grinding device 1 according to the embodiment> As shown in Figures 1 to 6, the rail grinding device 1 of the embodiment is a rail grinding device that uses a commercially available disc grinder 11, and is configured to include a cart body 12, a left-right sliding mechanism 13, a grinder holding / angle changing mechanism 14, a lifting mechanism 15, a grinder power switch holding mechanism 16, a rear brake 17, etc.

[0011] (Disc Grinder 11) The disc grinder 11 is a commercially available cordless, handheld type disc grinder that rotates a circular rotating grindstone 11b while a power switch (SW) 11a is pressed down, and in this embodiment, a removable battery 11d is attached to the rear 11c3 of the grinder body 11c and used as a power source.

[0012] In such commercially available handy type disc grinders 11, a rod-shaped handle (not shown) is usually provided in the grinder body 11c by screwing it into a female threaded hole (not shown) provided on the outer surface of the head portion 11c1, which has a built-in motor (not shown) that rotates the rotary grindstone 11b. In this embodiment, however, the rod-shaped handle is removed and the male threaded portion (not shown) at the tip of the rotating shaft 4a is screwed into the female threaded hole of the grinder body 11c where the rod-shaped handle was provided, and the rotating shaft 4a is rotatably supported by the grinder holding / angle changing mechanism 14.

[0013] In addition, such commercially available handheld disc grinders 11 generally have a grinder body gripping portion 11c2 between the rear portion 11c3 of the grinder body 11c and the head portion 11c1, which is thinner than the rear portion 11c3 and the head portion 11c1 and allows the grinder body 11c to be gripped with a hand other than the hand gripping the rod-shaped handle (not shown) of the head portion 11c1, and a grinder power switch holding mechanism portion 16 that holds (maintains) the power switch 11a in the on state is usually attached to the grinder body gripping portion 11c2.

[0014] (Cart body 12) The carriage body 12 is configured to move the left-right direction slide mechanism 13, the grinder holding / angle changing mechanism 14, and the lifting mechanism 15 along the rails R, R by the front and rear wheels 12a, 12a, 12f, 12f that roll on the left and right rails R, R, respectively, to grind the rail R on the wheels 12a, 12a side. The carriage body 12 is configured to move the left-right direction slide mechanism 13, the grinder holding / angle changing mechanism 14, and the lifting mechanism 15 along the rails R, R, respectively, by the front and rear wheels 12a, 12a that roll on the rail R on the grinder 11 side, by the wheels 12a, ... In addition, the trolley body includes a rectangular trolley body square frame 12c on which the left-right sliding mechanism 13 and the lifting mechanism 15 are mounted, a trolley body rod portion 12d formed from a single square pipe extending from the trolley body square frame 12c to the side opposite the grinder holding / angle changing mechanism 14, and a wheel support second frame 12e extending from the other end of the trolley body rod portion 12d parallel to the rail R and rotatably supporting the front and rear wheels 12f, 12f that roll on the rail R on the opposite side.

[0015] On the front, rear, left and right sides of the carriage body square frame 12c, gripping portions 12c1 are provided which are grasped by a plurality of workers when the rail refining device 1 is transported or installed.

[0016] (Left-right sliding mechanism 13) The left-right sliding mechanism 13 includes a slide table 13a installed on the upper side of the carriage body square frame 12c of the carriage body 12, and a slider 13b that slides on the slide table 13a in the left-right direction (gauge direction) perpendicular to the left and right rails R, R.

[0017] On the upper surface of the slider 13b, as shown in Figures 1 and 2, there are provided a lifting mechanism 15 which raises and lowers the disc grinder 11 attached to the grinder holding and angle changing mechanism 14, and a rod-shaped handle 13b1 which extends in the vertical direction higher than the rotating handle 15a1 of the lifting mechanism 15 and is held by an operator to move the rail grinding device 1 along the rails R, R and to slide the slider 13b, the lifting mechanism 15, and the grinder holding and angle changing mechanism 14 in a direction perpendicular to the left and right rails R.

[0018] (Grinder holding / angle changing mechanism 14) The grinder holding / angle changing mechanism 14 is a part to which the disc grinder 11 that rotates the rotary grindstone 11b is attached as shown in Figures 1 and 7, and which changes the angle of the disc grinder 11 by rotating about a rotation axis 14a parallel to the longitudinal direction of the rails R, R. The grinder holding / angle changing mechanism 14 has a pair of pivot shaft support plates 14b, 14b that rotatably support both ends of the rotation shaft 14a, and these pivot shaft support plates 14b, 14b are provided with arc-shaped angle setting holes 14b1, 14b1 at an angle of approximately 90 degrees around the rotation axis 14a.

[0019] In addition, angle setting plates 14a1, 14a1 are fixed to both ends of the rotating shaft 14a, and an angle setting shaft portion 14a2 with a male screw portion is provided at the position of the angle setting holes 14b1, 14b1 in the angle setting plates 14a1, 14a1, and both male screw portions of the angle setting shaft portion 14a2 pass through the angle setting holes 14b1, 14b1 of the rotating shaft support plates 14b, 14b. By tightening the nut 14a3 and the lever nut 14a4 from both sides on one side (for example, the left side in FIG. 5), the angle of the disc grinder 11 can be set by stopping at any position of the angle setting holes 14b1, 14b1. Incidentally, the angle setting plates 14a1, 14a1 may be provided on the outer side of the rotary shaft support plates 14b, 14b as shown in Figs. 5 and 6, etc., or may be provided on the inner side of the rotary shaft support plates 14b, 14b.

[0020] (Lifting mechanism 15) The lifting mechanism 15 is provided on the slider 13b of the left-right sliding mechanism 13 as shown in Figures 1 and 2, and is a mechanism for lifting and lowering the grinder holding / angle changing mechanism 14 in the Y-axis direction, which is the up-down direction. It extends in the up-down direction and is provided at its upper end with a rotating handle 15a1 that an operator can grasp and turn. It is also provided with a threaded rod 15a having a male threaded portion 15a2 on its outer periphery, a threaded rod support portion 15b that rotatably supports the threaded rod 15a, a lifting body 15c to which the grinder holding / angle changing mechanism 14 is attached at one end and which is raised and lowered at the other end by screwing into the male threaded portion 15a2 of the threaded rod 15a, and a lifting body height fixing lever 15d that fixes the height of the lifting body 15c relative to the threaded rod 15a.

[0021] The lifting body 15c includes a lifting nut 15c1 having a female screw portion (not shown) that screws into the male screw portion 15a2 of the threaded rod 15a, parallel mounting plates 15c2, 15c2 that extend parallel to the rotary shaft support plates 14b, 14b of the grinder holding / angle changing mechanism 14 and to which the rotary shaft support plates 14b, 14b are respectively fixed, a vertical mounting plate 15c3 that connects the grinder holding / angle changing mechanism 14 sides of the rotary shaft support plate parallel mounting plates 15c2, 15c2 and to which the rotary shaft support plates 14b, 14b are respectively fixed, and a vertical mounting plate 15c4 that connects the grinder holding / angle changing mechanism 14 sides of the rotary shaft support plate parallel mounting plates 15c2, 15c2 and to which the rotary shaft support plates 14b, 14b are respectively fixed, and a vertical mounting plate 15c5 that connects the rotary shaft support plate parallel mounting plates 15c2, 15c2 , 15c2 are connected to the lift nut 15c1 side of each of them, and together with the lift nut mounting plate 15c4 to which the lift nut 15c1 is attached, they are formed into a hollow rectangular shape such as a square in plan view, and in the hollow section surrounded by the pivot shaft support plate parallel mounting plates 15c2, 15c2, the pivot shaft support plate vertical mounting plate 15c3, and the lift nut mounting plate 15c4, cross-shaped reinforcing plates 15c5, 15c6 are provided which intersect to form a cross shape in plan view, and when combined with the pivot shaft support plates 14b, 14b, the pivot shaft support plate vertical mounting plate 15c3, and the lift nut mounting plate 15c4, they are configured to form an overall "T" shape.

[0022] In addition, the surface of the cross-shaped reinforcing plate 15c5 is arranged so as to be parallel to the horizontal, while the cross-shaped reinforcing plate 15c6 is arranged so as to be parallel to the vertical direction and is joined by welding or the like at the intersection portion through the underside of the cross-shaped reinforcing plate 15c5. This structure improves the strength even when the entire lifting body 15c is made of steel plates, and the cross-shaped reinforcing plates 15c5, 15c6 are configured in a simple structure with a cross shape when viewed in a plane without providing slits or the like.

[0023] Therefore, when a single worker lifts this rail grinding device 1, the worker can grasp the parallel mounting plates 15c2, 15c2 of the pivot shaft support plate, the vertical mounting plate 15c3 of the pivot shaft support plate, the lifting nut mounting plate 15c4, and the cross-shaped reinforcing plates 15c5, 15c6, etc., which are close to the center of gravity of the rail grinding device 1, thereby allowing the worker to lift the rail grinding device 1 in a well-balanced state, improving workability and reducing manufacturing costs.

[0024] (Grinder power switch holding mechanism 16) The commercially available handheld disc grinder 11 used in this embodiment normally rotates the rotary grindstone 11b only when the power switch 11a is pressed down and held in the on state.

[0025] For this reason, this disc grinder 11 is equipped with a grinder power switch holding mechanism 16 that holds (maintains) the power switch 11a in the on state, which is attached to the thin grinder body gripping portion 11c2 between the rear portion 11c3 of the grinder body 11c and the head portion 11c1, as shown in Figures 1, 7, 8, etc.

[0026] As shown in Figs. 7 to 9, the grinder power switch holding mechanism 16 is formed into a U-shape in plan view by connecting an angle member 16a and a flat plate member 16b with a hinge fitting 16c and a screw 16d, and has an eccentric rotating shaft 16e1 that is eccentric between the tip of the flat plate member 16b and the hinge fitting 16c. An eccentric cam switch 16e is provided which rotates around the eccentric rotating shaft 16e1 to keep the power switch 11a of the disc grinder 11 in the on state.

[0027] (Brake mechanism 17) The brake mechanism 17 is a mechanism that applies the brakes by pressing a brake shoe 17b1 at the lower end of the brake body 17b against the outer peripheral surface of the wheel 12a by rotating a brake lever 17a on one side (the lower side in Figure 2) of the wheel support first frames 12b, 12b that support the wheels 12a, 12a on the grinder 11 side.

[0028] <Operation of the rail grinding device 1 according to the embodiment> Next, the operation of the rail grinding device 1 of the embodiment configured as above will be described using as an example the case of grinding creaks at a gauge corner of a rail R.

[0029] The rail grinding device 1 of the embodiment has a carriage body 12, and the carriage body 12 runs on the rails R, R by front and rear wheels 12a, 12a that roll on the left and right rails R, R respectively, as shown in Figure 1 etc., so that an operator pushes the rail grinding device 1 of the embodiment to run to the location of the rail R to be grinded.

[0030] In this case, the worker may push any part of the rail grinding device 1 of the embodiment to move the trolley body 12, but for example, the worker can move the trolley body 12 by holding the rod-shaped handle 13b1, which is tall and requires less bending, or the rotating handle 15a1 of the lifting mechanism unit 15, which is shorter than the rod-shaped handle 13b1, or even by holding both the rod-shaped handle 13b1 and the rotating handle 15a1 of the lifting mechanism unit 15.

[0031] Therefore, by holding either the tall rod-shaped handle 13b1 or the rotating handle 15a1 of the lifting mechanism 15, or both the rod-shaped handle 13b1 and the rotating handle 15a1 of the lifting mechanism 15, the worker is less required to assume an uncomfortable position with his / her back bent, thereby improving workability and reducing the workload.

[0032] When the worker reaches the location of the rail R to be grinded, he or she then grasps the rotating handle 15a1 of the lifting mechanism 15 and rotates it to lower the rotating grindstone 11b of the disc grinder 11 held by the grinder holding and angle changing mechanism 14 to the height of the gauge corner of the rail R to be grinded, and at the same time grasps the rotating handle 15a1 of the lifting mechanism 15 or the rod-shaped handle 13b1 of the left-right sliding mechanism 13 to slide the slider 13b sideways on the slide table 13a so that the rotating grindstone 11b of the disc grinder 11 held by the grinder holding and angle changing mechanism 14 approaches the creak of the gauge corner of the rail R to be grinded.

[0033] When the rotating grinding wheel 11b of the disc grinder 11 is brought close to the creaking of the gauge corner of the rail R to be ground by the lifting mechanism 15 and the left-right sliding mechanism 13, depending on the position of the gauge corner where the creaking is occurring in the rail R, it may be difficult to grind if the rotating grinding wheel 11b of the disc grinder 11 remains facing vertically.

[0034] Therefore, as shown in Fig. 10, the grinder holding and angle changing mechanism 14 holding the disc grinder 11 rotates the disc grinder 11 around a rotating shaft 14a to change the angle of the grindstone 11b relative to the head of the rail R, so that the grindstone 11b comes into contact with the creaking of the gauge corner of the rail R. For ease of explanation, the grinder holding and angle changing mechanism 14 is omitted in Fig. 10, and only the disc grinder 11, the grinder power switch holding mechanism 16, and the rail are shown.

[0035] Then, when the angle of the disc grinder 11 has been set by the grinder holding / angle changing mechanism 14 so that the rotating grindstone 11b comes into contact with the creak at the gauge corner of the rail R, the eccentric cam switch 16e of the grinder power SW holding mechanism 16 attached to the grinder body gripping portion 11c2 of the disc grinder 11 is rotated from the power off state as shown in Figure 9(a) to the on state as shown in Figure 9(b), and the power switch 11a of the disc grinder 11 is held in the on state to correct the creak at the gauge corner of the rail R with the rotating grindstone 11b of the disc grinder 11.

[0036] Depending on the degree of grinding of the gauge corner of the rail R, the worker grasps the rotating handle 15a1 of the lifting mechanism 15 and rotates it to raise and lower the grinder holding / angle changing mechanism 14 and the disc grinder 11, grasps the rotating handle 15a1 of the lifting mechanism 15 or the rod-shaped handle 13b1 of the left-right sliding mechanism 13 and slides the slider 13b in the left-right direction to move the rotating grindstone 11b of the disc grinder 11 closer to or farther away from the gauge corner of the rail R to grind the creaking of the gauge corner, or grasps the rotating handle 15a1 of the lifting mechanism 15 or the rod-shaped handle 13b1 of the left-right sliding mechanism 13 to move or reciprocate the cart body 12 in the longitudinal direction of the rail R to grind the creaking of the gauge corner of the rail R.

[0037] Furthermore, when it is more convenient to stop the trolley body 11 and grind the gauge corner of the rail R, the worker can grab and pull the brake lever 17a of the brake mechanism unit 17 to apply the brake by pressing the brake shoe 17b1 at the lower end of the brake body 17b against the outer circumferential surface of the wheel 12a, and while the trolley body 11 is stopped, the worker can raise and lower the disc grinder 11 held by the grinder holding / angle changing mechanism unit 14, or slide the slider 13b left and right to move the rotating grinding wheel 11b of the disc grinder 11 closer to or farther away from the gauge corner of the rail R, thereby grinding the squeak.

[0038] <Summary of the rail grinding device 1 according to the embodiment of the present invention> As described above, the rail grinding device 1 of the embodiment of the present invention comprises a carriage body 12, a left-right sliding mechanism 13 provided on the carriage body 12 and equipped with a slider 13b that slides on a slide table 13a in the left-right direction perpendicular to the left and right rails R, R, a grinder holding / angle changing mechanism 14 that can change the angle of the disc grinder 11, and a lifting mechanism 15 provided on the slider 13b of the left-right sliding mechanism 13 and that raises and lowers the grinder holding / angle changing mechanism 14 in the vertical Y-axis direction.

[0039] Therefore, for example, even when grinding the so-called creaking of the head of rails R, R at the gauge corner, the grinding angle and grinding amount can be kept constant by the grinder holding / angle changing mechanism 14 and the left / right sliding mechanism 13, so it is possible to grind rails R, R without any difference in the finish quality or work efficiency when grinding rails R, R regardless of the skill level of the worker.

[0040] Furthermore, in the rail grinding device 1 of the embodiment of the present invention, a commercially available handheld disc grinder 11 is used in the grinder holding / angle changing mechanism 14, which reduces costs. In addition, the commercially available handheld disc grinder 11 uses a removable battery 11d as a power source, which eliminates the need to mount a generator (not shown) on the rail grinding device 1 or to use a power cord for power supply, making it lighter and cordless and improving work efficiency.

[0041] In addition, in the rail grinding device 1 according to the embodiment of the present invention, the lifting mechanism 15 is provided with a threaded rod support portion 15b that rotatably supports a threaded rod 15a that is vertically disposed on the slider 13b and has an upper end provided with a rotating handle 15a1 for an operator to grasp and turn, and a lifting body 15c to which the grinder holding / angle changing mechanism 14 is attached at one end and which is provided with a lifting nut 15c1 that is threadedly engaged with the male thread portion 15a2 of the threaded rod 15a to lift and lower. The lifting body 15c is provided with a rotating shaft support plate parallel mounting plates 15c2, 15c2 to which the grinder holding / angle changing mechanism 14 is attached, and a rotating shaft support plate parallel mounting plate 15c3, 15c4 to which the grinder holding / angle changing mechanism 14 is attached, and a lifting body 15c to which the lifting nut 15c3 is threadedly engaged with the male thread portion 15a2 of the threaded rod 15a to lift and lower. The rotary shaft support plate vertical mounting plate 15c3 which connects the grinder holding / angle changing mechanism 14 sides of 5c2, 15c2 and to which rotary shaft support plates 14b, 14b are fixed, and the lift nut mounting plate 15c4 which connects the lift nut 15c1 sides of the rotary shaft support plate parallel mounting plates 15c2, 15c2 and to which the lift nut 15c1 is attached, are formed into a hollow rectangular shape such as a square in plan view, and in the hollow portion surrounded by the rotary shaft support plate parallel mounting plates 15c2, 15c2, the rotary shaft support plate vertical mounting plate 15c3 and the lift nut mounting plate 15c4, cross-shaped reinforcing plates 15c5, 15c6 are provided so as to intersect and form a square shape in plan view.

[0042] Therefore, since the lifting mechanism 15 can accurately raise and lower the disc grinder 11, etc., it is possible to grind the rails R, R without causing any difference in the finish quality or work efficiency when grinding the rails R, R, regardless of the skill level of the worker.

[0043] In particular, the rotating shaft support plate parallel mounting plates 15c2, 15c2, the rotating shaft support plate vertical mounting plate 15c3, and the lifting nut mounting plate 15c4 of the lifting mechanism unit 15 are provided between the lifting body 15c and the grinder holding / angle changing mechanism unit 14, and in the hollow space surrounded by the rotating shaft support plate parallel mounting plates 15c2, 15c2, the rotating shaft support plate vertical mounting plate 15c3, and the lifting nut mounting plate 15c4, cross-shaped reinforcing plates 15c5, 15c6 are provided so as to intersect and form a "D" shape in a plan view. Therefore, when a worker lifts the rail grinding device 1 of the embodiment by himself when moving it, etc., he can grasp the cross-shaped reinforcing plates 15c5, 15c6 and lift it with good left and right weight balance, which also improves work efficiency in this respect.

[0044] Furthermore, in the rail grinding device 1 of the embodiment according to the present invention, a rod-shaped handle 13b1 extending in the vertical direction is provided on the slider 13b opposite to the lifting mechanism.

[0045] Therefore, the worker can hold the rod-shaped handle 13b1 with one hand while holding the rotating handle 15a1 of the lifting mechanism unit 15 with the other hand, making it possible to move the rail grinding device 1 along the rails R, R and grind the rail R in a stable state, which also improves work efficiency.

[0046] In addition, in the rail grinding device 1 of the embodiment of the present invention, a grinder power switch holding mechanism part 16 having an eccentric eccentric rotation shaft 16e1 and an eccentric cam switch 16e16a which rotates around the eccentric rotation shaft 16e1 to keep the power switch 11a of the disc grinder 11 in the on state is attached to the disc grinder 11.

[0047] Therefore, normally, the disc grinder 11 rotates the rotating grindstone 11b only when the power switch 11a is pressed down and held in the on state, so it is necessary to press down the power switch 11a while grinding work is being performed by the rotating grindstone 11b. However, in the rail grinding device 1 of the embodiment of the invention, the eccentric cam switch 16e16a of the grinder power supply SW holding mechanism 16 can maintain the power switch 11a of the disc grinder 11 in the on state, thereby improving the work efficiency of the grinding work.

[0048] In the rail grinding device 1 according to the embodiment of the present invention, the disc grinder 11 is a commercially available disc grinder having a rod-like shape. Side handle (also called side grip) From the female screw hole where the Side handle is removed and the rotating shaft 4a is attached to its female screw hole.

[0049] Therefore, according to the rail grinding device 1 of the embodiment of the present invention, the commercially available disc grinder 11 can be used Side handle Since the rotary shaft 4a can be attached by removing the disk grinder 11, it is possible to easily use a commercially available disk grinder 11, thereby reducing costs. [Explanation of symbols]

[0050] 1 Rail grinding equipment 11 Disc grinder 11a Power switch (SW) 11b Rotary grinding wheel 11c Grinder body 11c1 Head section 11c2 Grinding part of grinder body 11c3 Rear 11d Battery 12 Cart body 12a wheels 12b Wheel support first frame 12c Cart body square frame 12c1 Grip part 12d Cart body rod section 12e Wheel support second frame 12f wheels 13 Left and right slide mechanism 13a Slide table 13b Slider 13b1 Rod-shaped handle 14 Grinder holding and angle changing mechanism 14a Rotating shaft 14a1 Angle setting plate 14a2 Angle setting shaft 14a3 Nut 14a4 Lever Nut 14b Rotating shaft support plate 14b1 Angle setting hole 15 Lifting mechanism 15a Threaded rod 15a1 Rotating handle 15a2 Male thread 15b Threaded rod support 15c Lifting body 15c1 Lifting nut 15c2 Rotating shaft support plate Parallel mounting plate 15c3 Rotating shaft support plate vertical mounting plate 15c4 nut mounting plate 15c5,15c6 Cross-shaped reinforcement plate 15d Lifting body height fixing lever 16 Grinder power switch holding mechanism 16a angle material 16b flat plate material 16c Hinge fittings 16d Screw 16e Eccentric Cam Switch 16e1 Eccentric rotating shaft 17 Brake mechanism 17a Brake lever 17b Brake body 17b1 Brake shoe R rail

Claims

1. A carriage body having wheels that roll on the left and right rails, a left-right direction slide mechanism unit provided on the carriage body and including a slider that slides on a slide table in a left-right direction perpendicular to the left and right rails; a grinder holding and angle changing mechanism to which a disk grinder for rotating a rotary grindstone is attached and which can change the angle of the disk grinder by rotating about a rotation axis parallel to the longitudinal direction of the rail; a lifting mechanism provided on the slider of the left-right sliding mechanism for lifting and lowering the grinder holding and angle changing mechanism in a Y-axis direction, which is an up-down direction; The lifting mechanism includes: a threaded rod support part that is erected on the slider, extends in the vertical direction, and rotatably supports a threaded rod having an upper end provided with a rotating handle that an operator can grip and turn; a lifting body having one end to which the grinder holding and angle changing mechanism is attached and the other end to which a lifting nut is provided to be screwed into the threaded portion of the threaded rod and raised and lowered; The lifting body is a grinder holding and angle changing mechanism mounting plate to which the grinder holding and angle changing mechanism is attached; a lifting nut mounting plate to which the lifting nut is attached; a pair of connecting plates connecting the grinder holding / angle changing mechanism mounting plate and the lifting nut mounting plate; A rail grinding device characterized by having a grinder holding / angle changing mechanism mounting plate, a lifting nut mounting plate, and a cross-shaped reinforcing plate that connects the inner surfaces of the pair of connecting plates and is arranged to intersect in a cross shape when viewed from above.

2. The rail grinding device according to claim 1, A rail grinding device characterized in that a rod-shaped handle for an operator to grasp is provided on the opposite side of the lifting mechanism unit on the slider, the handle extending in the vertical direction higher than the height of the rotating handle.

3. A cart body having wheels that roll on left and right rails, a left-right direction slide mechanism unit provided on the carriage body and including a slider that slides on a slide table in a left-right direction perpendicular to the left and right rails; a grinder holding and angle changing mechanism to which a disk grinder for rotating a rotary grindstone is attached and which can change the angle of the disk grinder by rotating about a rotation axis parallel to the longitudinal direction of the rail; a lifting mechanism provided on the slider of the left-right sliding mechanism for lifting and lowering the grinder holding and angle changing mechanism in a Y-axis direction, which is an up-down direction; The disc grinder is characterized in that the side handle is removed from the female threaded hole to which the side handle was attached, and the rotating shaft is attached to the female threaded hole.

4. In the rail grinding device according to any one of claims 1 to 3, The rail grinding device is further characterized in that it is provided with a grinder power switch holding mechanism having an eccentric cam switch which rotates around the eccentric rotation shaft to keep the power switch of the disc grinder in the on state.

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