JP6774077B1 - Rail grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail grinding device capable of reducing a burden on an operator and performing high-precision finishing. SOLUTION: A grinder support frame 6 for supporting a grinder 5 for grinding the surface of a rail 2 with a grindstone 4 and a guide frame 7 for supporting the grinder support frame 6 are provided. The guide frame 7 is connected to a sliding member 8 guided by the guide shaft 9. The guide shaft 9 extends parallel to the rail 2 and is supported by the support member 12. The support member 12 is fixed to the rail 2 by the clamping means. The clamping means releasably abuts the first contact portions 13 and 14 that abut on the crown surface of the rail 2 and one of the head side surfaces, and the constricted upper end portion located below the other head side surface of the rail 2. It is provided with a contact portion 15. [Selection diagram] Fig. 1

Description

The present invention relates to a rail grinding device that finishes a welded portion by grinding and removing the weld surplus on the surface of a rail for railways.

Rails for railroads are being lengthened without joints with the aim of improving the riding comfort and speed of trains running on the rails.

Examples of the rail welding method include gold summit welding, enclosed arc welding, gas pressure welding, and flash butt welding. Although these welding methods differ to some extent, a surplus, which is a swelling of the surplus wall generated by welding, occurs, and it is necessary to remove the surplus after welding.

In this type of rail, first, primary welding is performed to weld a rail of 25 m to 50 m to several hundred meters, and then secondary welding is performed to lengthen a rail of several hundred meters to several kilometers. .. Primary welding is done in the factory or in a temporary factory, while secondary welding is done outdoors. In the case of laying new Shinkansen rails, there is an example in which a welding vehicle was prepared and up to secondary welding was carried out.

Since the primary welding is performed at a factory or a temporary factory, there are few restrictions on the device for welding and removing the surplus, and it is possible to secure an installation space for a large machine incorporating image processing, numerical control, and the like. In addition, rail transportation can be easily performed by moving the rail.

The secondary welding is performed by transporting the rail of the primary welded product to the laying site in advance and moving the welding device beside the laying site. Secondary welding is an outdoor work at the laying site and is carried out at intervals of several decades. In the case of rail renewal, it is a tough task for the operator because it is carried out regardless of the weather at midnight when there is little traffic.

Taking the case of the gas pressure welding method, which is often used for secondary welding, as an example, the rail end faces are ground with a grinder to a predetermined accuracy, the pair of rails are butted with an appropriate pressing force, and then the entire circumference of the rail is surrounded. The butt portion is heated to a high temperature of 1200 ° C. or higher with a heating burner of an oxygen acetylene flame to obtain a predetermined amount of deformation (ordinary rail: 24 mm or higher) to achieve welding. The amount of deformation that obtains the predetermined amount of deformation is generated as a surplus.

After joining by the gas pressure welding method, automatic or semi-automation is achieved up to the process of removing the welding surplus called "punching" to a few millimeters by hot plastic working. However, in the subsequent work of removing the surplus, a worker holding a grinder presses a rotating grindstone against the surface of the welded portion of the rail. The operator reciprocates the grindstone in small steps back and forth and left and right so as not to sharpen a specific part too much and make it a recess, and finish it so that there is no unevenness or step. In particular, the area extending from the top surface of the rail to the inner side surface of the head through the corners is the part where the train wheels and their brim come into contact with each other, so it is necessary to finish the rail smoothly so that there are no irregularities or steps.

Regarding the surplus removal processing, if the grinding accuracy of the conventional line is raised, the allowable range of height (height error of the rail head) with respect to the reference value is set to +0.5 mm to -0.1 mm in a span of 1 m, and the street (rail). The permissible range of (error on the side surface of the head) is +0.5 mm to -0.5 mm. Similarly, in terms of grinding accuracy of the Shinkansen, the allowable range of high and low with respect to the reference value is +0.3 mm to -0.1 mm, and the allowable range of the street is +0.3 mm to -0.3 mm in a span of 2 m.

The grinding accuracy of such excess removal processing is obtained by the skill of the operator who manually operates the grinder, but conventionally, a rail grinding device has been proposed in order to reduce the burden on the operator during the finishing work. (See Patent Document 1 below).

The rail grinding device described in Patent Document 1 is attached to a rail clamping means that clamps the rail and is fixed to the rail, a rail surface following means that is attached to the rail clamping means, and the rail surface following means. It is equipped with rail grinding means.

In the rail clamping means, guide rods parallel to each other in the longitudinal direction are erected on both side surfaces of the rail between a pair of rail support plates equipped with a clamping mechanism capable of fixing the rail head side in the center. There is.

The clamp mechanism is attached to a flat plate-shaped vertical holding plate mounted so as to project outward from the center of the rail support plate, a holding metal fitting having a fastening shaft mounted on the vertical holding plate and extending in the vertical direction, and the fastening shaft. On the other hand, a fastening nut mounted so as to be movable in the vertical direction and a pair of L-shaped catches connected to the fastening nut to hold the rail jaw from both sides and sandwich the rail head with the vertical holding plate. It is configured to prepare.

Then, the pair of catch pieces are in a fastened state in which the rail jaws are pressed from both sides by a link mechanism connected to the fastening nut, and in a released state in which the opening side of the pair of catch pieces is widened wider than the rail head width. It is configured to be easily obtained.

The rail surface following means includes a fixed plate equipped with a traveling device that can move along each guide rod of the rail clamp means, a rotating plate rotatably attached to the fixed plate, and a rotating plate. It is equipped with a slide body that can be moved back and forth.

Then, a guide portion is provided on the fixed plate side of the slide body, guide holes are formed above and sideways surrounding the rotation shaft of the fixed plate, and the guide portion is formed through an elongated hole formed in the rotation plate. By mounting the rod so that it fits into the rail, the operating rod mounted on the slide body follows the head of the rail surface and operates.

The rail grinding means is attached to the operating rod of the slide body of the rail surface following means so as to face the rail head.

Japanese Unexamined Patent Publication No. 2001-49604

In this type of rail grinding apparatus, it is indispensable to provide a clamp mechanism capable of securely fixing the guide rod to the rail in order to obtain high grinding accuracy.

However, in the clamp mechanism of Patent Document 1, not only the positioning accuracy of the center of the rail support plate with respect to the center of the top surface of the rail in the width direction is poor due to the influence of the thickness error of the rail head, but also rattling is likely to occur. .. Therefore, there is a disadvantage that it is difficult to finish the outer surface of the rail with high accuracy.

In view of the above points, it is an object of the present invention to provide a rail grinding apparatus capable of reducing the burden on the operator and performing high-precision finishing.

In order to achieve such an object, the present invention is a rail grinder for finishing a welded portion by grinding and removing a weld surplus on the surface of the rail, in parallel with the rail along the longitudinal direction of the rail. The surface of the rail can be ground by an extending guide shaft, a support member provided at the end of the guide shaft to support the guide shaft, a clamping means for fixing the support member to the rail, and a rotating grinder. A grinder, a grinder support frame that supports the grinder, a guide frame that guides the grinder support frame along the shape of the crown surface and one of the head surfaces of the rail, and a guide frame provided on the grinder support frame to guide the grinder. A posture maintaining means for maintaining the facing state between the grinder's grinder and the crown surface and one of the head surfaces of the rail when guided by the frame, and slidably provided on the guide shaft connected to the guide frame. The clamping means is provided on a first contact portion that abuts on the crown surface and one head side surface of the rail, and a constriction upper end portion that is located below the other head side surface of the rail. The posture maintaining means includes a second contact portion that is releasably abutted, and the posture maintaining means has a guide surface formed on the guide frame and having the same size of the continuous rail shape of the crown surface and one of the head surfaces of the rail. , The guide portion provided on the outer peripheral side and the inner position of the substantially arc start of the grinder support frame guided by the guide frame, and the guide portion provided on the grinder support frame and abutting against each of the guide surfaces thereby bring the guide portions to each other. It is characterized by being composed of a pair of non-coaxial rollers that roll while being sandwiched from opposite sides .

In the clamping means in the present invention, the first contact portion abuts on the top surface of the rail and one side surface of the head, and the second contact portion abuts on the lower end of the other head side surface of the rail. Press). According to this, the support member can be reliably fixed to the rail without being affected by the thickness error of the head of the rail. Therefore, it is possible to prevent a decrease in grinding accuracy of the rail surface due to the clamped state.

Further, according to the above configuration, the pair of rollers move along the trajectory formed by both guide surfaces with the guide portion sandwiched between them. At this time, the grinder support frame moves while maintaining a stable predetermined posture by a pair of rollers.

Therefore, the grinder (grinding stone) can be accurately moved along the shape of the rail from the top surface of the rail to one side surface of the head. Moreover, since the guide portion is sandwiched between a pair of rollers provided on the grinder support frame, the number of parts is small, the structure is simple, and the posture maintaining means can be made smaller and lighter.

Further, the present invention is a rail grinder for finishing a welded portion by grinding and removing the weld surplus on the surface of the rail, the guide shaft extending in parallel with the rail along the longitudinal direction of the rail, and the said. A support member provided at the end of the guide shaft to support the guide shaft, a clamping means for fixing the support member to the rail, a grinder capable of grinding the surface of the rail with a rotating grinder, and the grinder. When a grinder support frame to be supported, a guide frame for guiding the grinder support frame along the shape of the crown surface and one of the head surfaces of the rail, and a guide frame provided on the grinder support frame and guided by the guide frame. A posture maintaining means for maintaining a state in which the grinder grinder and the crown surface of the rail and one of the head surfaces face each other, and a sliding member connected to the guide frame and slidably provided on the guide shaft. The clamping means is releasably abutted on a first contact portion that abuts on the crown surface and one head side surface of the rail, and a constricted upper end portion located below the other head side surface of the rail. The posture maintaining means includes a guide groove formed in the guide frame and having a continuous rail shape of the crown surface and one of the head surfaces of the rail substantially equal to the same size, and the grinder support frame. It is characterized in that it is composed of a pair of rollers provided in the guide groove and arranged at predetermined intervals in the guide groove .

According to this, a pair of rollers in the guide groove move along the trajectory formed by the guide groove.

The guide groove has a shape in which the continuous rail shape of the top surface of the rail and one side surface of the rail is substantially the same size, but the position between the pair of rollers is the continuation of the top surface surface of the rail and one side surface of the head. There is a track with the same shape as the rail shape. Then, by moving the grinder support frame along this trajectory, the grinder (grinding stone) can be moved with high accuracy.

Moreover, since the posture maintaining means is composed of a pair of rollers provided on the grinder support frame and guide grooves for guiding both rollers, the number of parts is small, the structure is simple, and the posture maintaining means can be made smaller and lighter. It becomes.

Further, in the present invention, it is preferable that the grinder support frame is provided with a cutting adjustment means for adjusting the cutting amount of the grinder by the grindstone.

According to this, since the cutting amount of the grindstone can be easily adjusted by the cutting adjusting means, even a relatively low-skilled operator can operate the grinder with high accuracy.

Further, in the present invention, the grinder of the grinder is formed in a disk shape and is supported by a rotation shaft of the grinder, and the grinder support frame grinds the rail at a position outside the rotation shaft of the grinder. It is preferable to support the grinder in a posture of

On the surface of the rail ground by the grindstone, grinding marks corresponding to the contact of the grindstone are generated. The grinding marks generated at this time are preferably parallel to the longitudinal direction of the rail as much as possible.

On the other hand, in the disk-shaped grindstone, the rotation shaft of the grinder is connected to the center thereof. When the rail is ground in the region including the central portion of the grindstone where the axis of rotation is located, a circular grinding mark is generated, and some of the grinding marks intersect with the longitudinal direction of the rail. Therefore, by using a disc-shaped grindstone and grinding the rail at a position outside the rotation axis of the grindstone (that is, a position shifted from the center of the grindstone), it is possible to suppress the occurrence of grinding marks that intersect the longitudinal direction of the rail. be able to.

Further, in the present invention, it is preferable to provide a driving means for driving the movement of the sliding member along the guide shaft.
As a result, the grinding work can be automated and the burden on the operator can be reduced.

Further, in the present invention, the grinder support frame may include a balancer that applies tension to the grinder against the load of the grinder when the grinder moves along the crown surface of the rail and one of the head surfaces. preferable.

According to this, since the tension of the balancer cancels the load of the grinder when operating the grinder, the burden on the operator when operating the grinder can be reduced.

Explanatory perspective view showing a rail grinder mounted on a rail. Figure II arrow diagram of FIG. Figure III arrow in FIG. Explanatory drawing of posture maintenance means. Explanatory drawing of a modified example of the posture maintaining means Explanatory drawing which shows the contact posture of a grindstone with respect to a rail.

An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the rail grinding device 1 of the present embodiment is used by being attached to the rail 2, and includes a grinder 5 for grinding and finishing the welded portion 3 of the rail 2 with a rotating grindstone 4. ..

The grinder 5 is supported by the grinder support frame 6. The grinder support frame 6 is supported by the guide frame 7. The guide frame 7 is connected to the sliding member 8. The sliding member 8 is slidably provided on the guide shaft 9 and is connected to the driving means 11 via the connecting member 10.

The drive means 11 includes a ball screw (not shown) housed inside the housing 11a, and moves the sliding member 8 by rotating the input shaft 11b of the ball screw with a power source such as a motor (not shown). ..

Both ends of the guide shaft 9 are supported by the support member 12. As shown in FIG. 2, the support member 12 has two first contact portions (top surface contact portion 13 and head side contact portion 14) and one second contact portion (jaw contact portion 15). It is provided with a clamping means including the above, and is fixed to the rail 2 by the clamping means. Further, the support member 12 is provided with a handle portion 16 that is gripped when the support member 12 is carried when attached to the rail 2.

The parietal contact portion 13 abuts on the parietal surface 2a of the rail 2, and the parietal contact portion 14 abuts on one of the head side surfaces 2b of the rail 2 (the surface that becomes the inner surface when the two rails 2 are laid). Get in touch.

The jaw contact portion 15 is provided at the tip of the contact rod 17 and abuts on the lower end of the jaw portion 2c of the rail 2. The abutting rod 17 includes a handle 18 that performs a rotation operation, and moves forward and backward toward the rail 2 by the rotation operation of the handle 18.

The jaw contact portion 15 presses the jaw portion 2c of the rail 2 from the opposite side of the corner portion of the head of the rail 2 between the parietal surface contact portion 13 and the head side surface contact portion 14. As a result, the support member 12 can be fixed to the rail 2 without rattling without being affected by the thickness error of the head of the rail 2.

As shown in FIGS. 2 and 3, the grinder 5 includes a grinder main body 19 and a rotation shaft 20 protruding from the grinder main body 19. As shown in FIGS. 1 and 2, the grinder main body 19 is provided with a grip portion 21 for the operator to grip. As shown in FIG. 3, the central portion of the disk-shaped grindstone 4 is connected to the rotating shaft 20 of the grinder 5.

As shown in FIGS. 1 and 2, the grinder support frame 6 supports the grinder 5 by connecting to the grinder main body 19. The grinder support frame 6 is provided with a notch adjusting means 22, an operation switch box 23, and a locking means 24. Further, the grinder support frame 6 is provided with an auxiliary handle 25 that the operator grips when operating the grinder 5.

The notch adjusting means 22 adjusts the notch amount of the grinder 5 by the grindstone 4, and although a detailed configuration is omitted in the drawing, the notch 4 is set to a desired notch amount by moving the grindstone 4 slightly forward and backward with respect to the rail 2. You can do it.

The guide frame 7 guides the grinder support frame 6 along the shape of the grinding region from the top surface 2a of the rail 2 to the one side surface 2b of the head. The guide frame 7 is formed with a guide groove 26 for guiding the grinder support frame 6. The guide groove 26 is formed to have substantially the same size (similar shape) of the shape of the grinding region from the crown surface 2a of the rail 2 to the one head side surface 2b.

The locking means 24 of the grinder support frame 6 penetrates the guide groove 26. As shown in FIG. 2, a rotation operation unit 27 is provided at the end of the locking means 24, and by rotating the rotation operation unit 27, the grinder support frame 6 is placed at a desired position in the guide region of the guide groove 26. Can be fixed.

Further, as shown in FIG. 4, a pair of rollers 28a and 28b provided in the grinder support frame 6 are arranged inside the guide groove 26. The rollers 28a and 28b are provided so as to be located on both sides of the shaft of the locking means 24, and the two rollers 28a and 28b guided by the guide groove 26 correspond to the posture of the grinder support frame 6 and the shape of the guide groove 26. To change. As a result, the structure can be simplified and the grindstone 4 can be accurately moved on the track along the shape of the rail 2.

When the two rollers 28a and 28b are guided by the guide groove 26 and the grinder 4 of the grinder 5 faces a desired position of the rail 2 via the grinder support frame 6, the locking means 24 locks the movement of the grinder support frame 6. Let me.

The guide groove 26 and the pair of rollers 28a and 28b form the posture maintaining means of the present invention. In addition to this configuration, in the posture maintaining means of the present invention, as shown in a modified example in FIG. 5, a pair of rollers 30a and 30b provided on the grinder support frame 29 form a guide surface on the front and back of the guide portion 32 of the guide frame 31. 32a, 32b, that is, the guide surface 32a facing outward (facing the side opposite to the rail 2 side) and the guiding surface 32b facing inward (facing the rail 2 side) are brought into contact with each other to bring the guide portion 32 from the front and back (inside and outside). It may be configured to be sandwiched (from both sides). In this case, both the outward guide surface 32a and the inward guide surface 33b are formed to have the same size (similar shape) as the shape of the grinding region from the top surface of the rail to one of the head surfaces.

As shown in FIG. 6, the disc-shaped grindstone 4 rotated by the grinder 5 comes into contact with the surface of the rail 2 to be ground in a slightly inclined posture. Further, the grindstone 4 comes into contact with the rail 2 at one outer position with respect to the axis of the rotating shaft 20 of the grinder 5, and grinds the surface of the rail 2. As a result, the occurrence of grinding marks that intersect the longitudinal direction of the rail 2 is suppressed, and the grinding marks are likely to be formed in a substantially straight line along the longitudinal direction of the rail 2.

Further, the posture and contact position of the grindstone 4 imitate the grinding work of a highly skilled worker, and the disc-shaped grindstone 4 itself bends very slightly, so that the surface of the rail 2 is bent. Can be finished smoothly.

Further, as shown in FIGS. 1 and 2, the grinder support frame 6 is connected to a balancer 33 that applies tension to and from the guide frame 7. The balancer 33 is composed of a wire 34 and a reel 35 connected to the guide frame 7 and winding the wire 34. The reel 35 has a built-in tension generating means (not shown) that generates tension in the winding direction, and applies a tensile force to the wire 34 drawn from the reel 35.

A hook member 36 is provided at the tip of the wire 34, and a hook member 37 for detachably hooking the hook member 36 is provided on the grinder support frame 6. In the figure, the hook member 36 of the wire 34 is not hooked to the hook member 37, but the hook member 36 is locked to the hook member 37 at the time of use.

At this time, the pulling force on the wire 34 opposes the load of the grinder 5 and the grinder support frame 6, and reduces the weight felt by the operator when the grinder support frame 6 is moved.

Further, the guide frame 7 is provided with a plurality of pulleys 38 rotatably provided along the guide groove 26. Each pulley 38 receives a wire 34 drawn from a reel 35 as the grinder support frame 6 moves. As a result, it is possible to prevent the wire 34 drawn from the reel 35 from interfering with the rotation operation unit 27 of the locking means 24 of the grinder support frame 6 and hindering the smooth movement of the grinder support frame 6.

The rail grinding device 1 of the present embodiment configured as described above is used as follows.

With reference to FIG. 1, first, the support member 12 is placed on the rail 2, and further, the first contact portion (top surface contact portion 13, head side contact portion 14) of the clamping means and the second contact portion are contacted with each other. The support member 12 is fixed to the rail 2 by firmly sandwiching the rail 2 with the portion (jaw contact portion 15). At this time, both support members 12 are attached and fixed so that the welded portion 3 of the rail 2 is located at the central portion between the two support members 12.

Next, the grip portion 21 of the grinder 5 is gripped to release the locking means 24 of the grinder support frame 6, and the auxiliary handle 25 is gripped as necessary to move the grinder support frame 6. Then, the grinder 4 of the grinder 5 is opposed to the grinding target position of the rail 2, and the locking means 24 of the grinder support frame 6 is operated to lock the grinder support frame 6.

Subsequently, the cutting adjustment means 22 brings the grindstone 4 of the grinder 5 into contact with the grinding target position of the rail 2 to set a predetermined cutting amount. After that, the driving means 11 reciprocates the grindstone 4 of the grinder 5 via the sliding member 8, the guide frame 7, and the grinder support frame 6, and grinds and finishes the welded portion 3 of the rail 2. When the finishing of the rail 2 at the position is completed, the driving means 11 is stopped, the locking means 24 of the grinder support frame 6 is released, and the grinder support frame 6 is moved. Then, the grindstone 4 of the grinder 5 is moved to a position to be ground adjacent to the position where the finishing is completed, and grinding is performed by the above procedure. In this way, the burden on the operator can be reduced by sequentially grinding and finishing the welded portion 3 of the rail 2 from the crown surface 2a through the corner portion to one of the head side surfaces 2b.

Although not shown, the rail grinding device 1 may be provided with a molding dressing function for pressing diamond grains against the grindstone 4. According to this, the grindstone 4 can be formed with high accuracy and the sharpness of grinding can be maintained.

Further, in order to prevent the locus of the grindstone 4 from deviating from the ideal position when the outer diameter of the grindstone 4 is reduced by grinding and molding dressing, the position of the grinder 5 to which the grindstone 4 is attached is adjusted by the wear diameter of the grindstone. It is preferable to provide a mechanism for this.

1 ... rail grinder, 2 ... rail, 2a ... crown surface, 2b ... one head side surface, 2c ... jaw part (upper end of constriction located below the other head side surface), 3 ... welded part, 4 ... grindstone, 5 ... Grinder, 6 ... Grinder support frame, 7 ... Guide frame, 8 ... Sliding member, 9 ... Guide shaft, 11 ... Drive means, 12 ... Support member, 13 ... Top surface contact part (first contact part) , 14 ... Head side contact portion (first contact portion), 15 ... Jaw portion contact portion (second contact portion), 20 ... Rotation shaft, 22 ... Notch adjusting means, 26 ... Guide groove, 28a, 28b , 30a, 30b ... Roller, 32 ... Guide, 33 ... Balancer.

Claims (6)

A rail grinding device that finishes the welded part by grinding and removing the weld surplus on the surface of the rail.
A guide shaft extending parallel to the rail along the longitudinal direction of the rail, a support member provided at an end of the guide shaft to support the guide shaft, and a clamping means for fixing the support member to the rail. A guide that guides a grinder capable of grinding the surface of the rail with a rotating grindstone, a grinder support frame that supports the grinder, and the grinder support frame along the shape of the crown surface and one of the head surfaces of the rail. A frame, a posture maintaining means provided on the grinder support frame and maintaining a state of facing the grinder's grindstone and the crown surface and one of the head surfaces of the rail when guided by the guide frame, and the guide frame. A sliding member connected to the guide shaft and slidably provided on the guide shaft is provided.
The clamping means has a first contact portion that abuts on the crown surface and one head side surface of the rail, and a second contact portion that releasably abuts on the constricted upper end portion located below the other head side surface of the rail. and a part,
The posture maintaining means activates a substantially arc of a grinder support frame formed on the guide frame to guide the guide surface formed on the guide frame and having the shape of the continuous rail on the top surface of the rail and one of the head surfaces equal to the same size. The guide portion provided on the outer peripheral side and the inner position thereof, and the non-coaxial portion provided on the grinder support frame and rolling while sandwiching the guide portion from the side facing each other by contacting each of the guide surfaces. A rail grinding device characterized by being composed of a pair of rollers . A rail grinding device that finishes the welded part by grinding and removing the weld surplus on the surface of the rail.
A guide shaft extending parallel to the rail along the longitudinal direction of the rail, a support member provided at an end of the guide shaft to support the guide shaft, and a clamping means for fixing the support member to the rail. A guide that guides a grinder capable of grinding the surface of the rail with a rotating grindstone, a grinder support frame that supports the grinder, and the grinder support frame along the shape of the crown surface and one of the head surfaces of the rail. A frame, a posture maintaining means provided on the grinder support frame and maintaining a state of facing the grinder's grindstone and the crown surface and one of the head surfaces of the rail when guided by the guide frame, and the guide frame. A sliding member connected to the guide shaft and slidably provided on the guide shaft is provided.
The clamping means has a first contact portion that abuts on the crown surface and one head side surface of the rail, and a second contact portion that releasably abuts on the constricted upper end portion located below the other head side surface of the rail. With a part
The posture maintaining means includes a guide groove formed in the guide frame and having a substantially equal size of the continuous rail shape of the crown surface and one of the head side surfaces of the rail, and the guide groove provided in the grinder support frame. A rail grinding device characterized by being composed of a pair of rollers arranged at predetermined intervals . The rail grinding apparatus according to claim 1 or 2 , wherein the grinder support frame includes a cutting adjustment means for adjusting a cutting amount of the grinder by a grindstone. The grindstone of the grinder is formed in a disk shape and is supported by a rotation shaft of the grinder.
The rail grinding apparatus according to any one of claims 1 to 3 , wherein the grinder supporting frame supports the grinder in a posture in which the outer position of the rotating shaft on the grindstone is in contact with the rail for grinding. .. The rail grinding apparatus according to any one of claims 1 to 4 , further comprising a driving means for driving the movement of the sliding member along the guide shaft. The grinder supporting frame, upon movement of the grinder along the top surface and one of the head sides of the rail, according to claim 1, the tension against the load of the grinder, characterized in that it comprises a balancer to be given to the grinder The rail grinder according to any one of 5 to 5 .

Images