JPH0660603U - Rail polishing device and polishing tool - Google Patents

Abstract

(57) [Summary] [Purpose] A rail polishing device that can be used for polishing the rail side surface and rail upper surface, and that can perform polishing work safely, and a polishing tool that does not increase the polishing amount more than necessary when the vehicle is stopped. [Structure] A hand truck 2 that can be loaded and unloaded on one rail R
And a polishing machine 3 which is detachably mounted on the hand truck 2. The polishing machine 3 includes grips 22 and 23 provided at appropriate positions, a drive source 18, and an extension rod 19 extending from the drive source 18. , A rail upper surface polishing tool 20 and a rail side surface polishing tool 21 that are replaceably attached to the tip of the extension rod 19, and the driving force of the drive source 18 is transmitted to the attached polishing tool 20 (or 21). The transmission tool 24 is provided, and the rotation axis center line B of the polishing tool 20 (or 21) is intersected with the rod center line A of the extension rod 19 at a predetermined downward working angle C.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rail polishing device and a polishing tool used to remove rust, oil, or other deposits on the top and side surfaces of a rail.

[0002]

[Prior art]

 As one of the means for train operation management, there is a method of using a track circuit composed of rails and trains. In order to construct this track circuit, it is necessary to make rail bonds that connect the rail joints with conductors and further reduce the electrical resistance between the rails and the train wheels.

In the above-mentioned rail bond construction, it is necessary to remove the deposits which become obstacles for welding by previously polishing the rail side surface, which is the bond welding point. In order to reduce the electric resistance between the rail and the wheels, it is necessary to remove the deposits that increase the electric resistance by preliminarily polishing the rail upper surface with which the wheels come into contact. In particular, when replacing the rail, it is necessary to polish the side and top surfaces of the rail at the same time because the new rail is rusted. Conventionally, polishing of the rail side surface and polishing of the rail upper surface have been performed using dedicated polishing devices.

The polishing apparatus for the side surface of the rail includes a drive source composed of a large engine, a drive shaft having a grindstone attached to a tip thereof, a pipe-shaped gripping portion having the drive shaft supported in a hollow interior, and the drive shaft. And a flexible transmission for communicating with the source. When polishing the rail side surface, the operator holds the grip firmly and presses the outer peripheral surface of the rotating grindstone against the rail side surface.

The polishing apparatus for the upper surface of the rail includes a hand truck that can be loaded and unloaded on the rail, a drive source that includes an engine that is fixedly mounted on the truck, a support portion that is attached to the carriage and that has a grindstone, and a support portion and a drive portion. It is equipped with a transmission device that communicates with the source and has a large total weight of about 50 kg. When polishing the rail top surface, the rotating whetstone is applied to the rail top surface while pushing the cart by hand.

[0006]

[Problems to be solved by the device]

 However, when it is necessary to polish the rail side surface and rail upper surface at the same time, such as when replacing the rails, it is necessary to prepare a large-scale dedicated polishing device for each, so transporting both polishing devices to the site, etc. It required a lot of labor and effort. In addition, when grinding the side of the rail, the grip and the grindstone are on the same axis and are close to each other. There was a danger of. Further, since the polishing work of the rail upper surface is performed with a hard grindstone, the polishing amount becomes unnecessarily large when the traveling of the trolley is stopped, which causes a step on the rail surface, and a polishing defect is likely to occur near the step. Further, the polishing work on the rail upper surface was difficult because the hard grindstone easily jumped from the rail upper surface. Therefore, in the conventional polishing work on the upper surface of the rail, in order to prevent the above-mentioned polishing failure, it is necessary to reciprocate the polishing apparatus on the upper surface of the rail to perform polishing twice, which is very troublesome.

In order to solve the above problems, the present invention provides a rail polishing device that can be used for polishing the side surface and the top surface of a rail, and that can perform polishing work safely, and the amount of polishing when traveling is more than necessary. The purpose is to provide a polishing tool that does not increase in number.

[0008]

[Means for Solving the Problems]

 The first means adopted by the present invention comprises a hand truck that can be mounted on and off a rail, and a grinder that is detachably mounted on the hand truck, and the grinder is provided at a proper position. A drive source, an extension rod extending from the drive source, a rail upper surface polishing tool and a rail side surface polishing tool that are attached to the distal end of the extension rod in exchange by themselves, and the attached polishing tool. And a transmission tool for transmitting the driving force of the drive source. When the polishing machine is mounted on a hand cart and the polishing tool for rail upper surface is mounted, the extension rod is tilted downward. The upper surface of the rail can be polished by the lower surface of the rail, and when the polishing machine is removed from the hand cart and the rail side polishing tool is attached, the rail side surface is polished by the side of the polishing tool with the extension rod tilted downward. As far as possible, pair the extension rod with the center line. A rail polishing apparatus, wherein a rotation axis of the grinding tool was crossed by a downward working angle Te.

A second means adopted by the present invention is, in a rail upper surface polishing tool, a pad having an output portion connecting boss portion, a cushion layer joined to the lower surface of the pad, and a lower surface of the cushion layer. A rail top polishing tool, comprising: a polishing sheet that is replaceably bonded to the rail via a surface fastener.

A third means adopted by the present invention is, in a rail side polishing tool, a pad having a boss portion for connecting an output portion, a cushion layer joined to a lower surface of the pad, and an outer periphery of the cushion layer. A rail side polishing tool comprising a polishing sheet bonded to a surface and an elastic sheet bonded to a lower surface of the cushion layer.

[0011]

[Action]

 In the first means, if the grinder is attached to the bogie and the rail upper surface grinder is attached to the grinder, the rail upper surface can be ground as the bogie runs on the rail. If you remove the grinder from the dolly and attach the rail side grinder to the grinder, you can grind the rail side. When polishing the side surface of the rail, the operator grips the grinder because the centerline of the rotating shaft of the grinder crosses the bar centerline of the extension rod of the grinder removed at a predetermined downward working angle. Can be done by grasping.

In the second means, since the polishing sheet is joined to the lower surface of the cushion layer, the polishing sheet can be pressed against the rail upper surface with an appropriate pressing force. Further, since the polishing sheet is joined to the lower surface of the cushion layer via the surface fastener so as to be replaceable, the polishing sheet can be replaced easily and quickly. Since the polishing sheet is backed up by the cushion layer, it easily fits on the rail top surface and is less likely to chip during polishing.

According to the third means, since the polishing sheet is joined to the outer peripheral surface of the cushion layer and the elastic sheet is joined to the lower surface of the cushion layer, the polishing sheet is pressed against the side surface of the rail with an appropriate pressing force. It can be pressed with. Since the polishing sheet is backed up by the cushion layer, it easily fits on the side of the rail and is less likely to chip during polishing.

[0014]

【Example】

 Hereinafter, a rail polishing apparatus and a polishing tool according to the present invention will be described based on the embodiments shown in the drawings. 1 to 7 show an embodiment of a rail polishing device and a polishing tool according to the present invention. FIG. 1 is a perspective view showing a state where a hand cart and a grinder are separated, and FIG. 2 is a hand cart. FIG. 3 is a vertical sectional view of a rail upper surface polishing tool, FIG. 4 is a vertical sectional view of a rail side surface polishing tool, and FIG. 5 is a perspective view showing a state in which the rail upper surface is polished. FIG. 6 is a perspective view showing a state where the hand pushing arm is bent and the stand is stood up, and FIG. 7 is a perspective view showing a state where the side surface of the rail is polished.

As shown in FIG. 1, the rail polishing apparatus 1 includes a hand truck 2 and a polishing machine 3 which is detachably mounted on the hand truck 2. The hand truck 2 is configured to be able to get on and off a single rail, and has a frame 4 having a U-shaped cross section (see FIG. 2), and front and rear legs 5 hanging on the lower surface side of the frame 4. , 6, rollers 8,8 pivotally supported by shafts 7,7 made of bolts or the like on each of the legs 5,6, and attachments / detachments 9,10 arranged near the front and the center of the upper surface of the frame body 4. And a hand-pushing handle 11 arranged at the rear of the upper surface of the frame 4, and a swingable stand 12 arranged near the rear end of the frame 4. The hand cart 2 can be configured to have a weight of about 6 kg.

The roller 8 (see FIG. 2) is formed of an insulating synthetic resin such as nylon, and has flanges 8a and 8b on both sides so as not to derail from the rail R. The front attaching / detaching tool 9 has a split structure including a fixed receiving tool 9a and a swingable pressing tool 9b, and by engaging the tip of the pressing tool 9b with the receiving tool 9a, polishing is performed. The extension rod 19 of the machine 3 is grasped and fixed (see FIG. 5). The rear attachment / detachment tool 10 comprises a bracket 13 having a long hole 13a and a butterfly bolt 14, and the butterfly bolt 14 is screwed to the fixture 26 of the polishing machine 3 through the long hole 13a to polish the polishing machine. The rear part of 3 is fixed to the trolley 2.

The hand-push handle 11 includes a support portion 15 standing upright from the frame 4 of the carriage 2, hand-push arms 16 and 16 foldably attached to the support portion 15, and adjusting screws 17 for fixing the hand-push arms 16 and 16. Consists of. The arms 16 and 16 are manually pushed by loosening and tightening the adjusting screws 17 (see FIG. 5) or folded (see FIG. 6).

The polishing machine 3 includes a drive source 18 including a gasoline engine or an electric motor, an extension rod 19 extending from the drive source 18 and having an appropriate length L (for example, L = 33 cm), and an extension rod 19. Polishing tool 20 (or 21) that is replaceably attached to the tip, grips 22 and 23 provided at appropriate places behind the drive source 18 and the extension rod 19, and the polishing tool 20 (or 21) that is attached And a transmission tool 24 for transmitting the driving force of the drive source 18, and the rotation shaft center line B of the polishing tool 20 (or 21) is made to intersect with the rod center line A of the extension rod 19 at a downward working angle C. is there. The polishing machine 3 can be configured to have a weight of about 5 kg when a small gasoline engine is used as the drive source 18.

As shown in FIG. 5, the downward working angle C means that when the polishing machine 3 is mounted on the hand truck 4 and the rail upper surface polishing tool 20 is mounted, the rail upper surface Ra is moved to the polishing tool 20. A state in which the bottom surface can be polished and the extension rod 19 of the polishing machine 3 is inclined downward when the polishing machine 3 is removed from the hand cart 4 and the rail side polishing tool 21 is attached as shown in FIGS. 1 and 7. Indicates the angle at which the rail side surface Rb can be polished by the side surface of the polishing tool 21.

The transmission tool 24 includes a transmission shaft (not shown) pivotally supported in the hollow portion of the extension rod 19 and a gear box 25 provided at the tip of the extension rod 19, and drives one end of the transmission shaft. It is connected to the output of the source 18 and the other end is connected to the gearbox 25. The gear box 25 is provided with an output shaft (not shown) for attaching the polishing tool 20 (or 21). The handles 22 and 23 are wound with vibration-proof rubber so that vibrations are not transmitted to the operator.

As shown in FIG. 3, the rail upper surface polishing tool 20 includes a pad 28 made of synthetic resin or aluminum, a cushion layer 29 bonded to a circular lower surface 28 a of the pad 28, and a lower surface 29 a of the cushion layer 29. The polishing sheet 31 is replaceably bonded via the surface fastener 30. The pad 28 has an insertion hole 28b into which the output shaft (not shown) protruding from the gear box 25 of the transmission 24 is inserted in the boss portion 28c for connecting the output portion, and the output shaft is connected to the output shaft. A nut 32 to be screwed is embedded.

The cushion layer 29 is formed of sponge or foamed synthetic resin with an appropriate thickness T1 (for example, T1 = 15 mm) and an outer diameter D1 (for example, D1 = 100 mm). The polishing sheet 31 has a base material made of cloth, paper or the like and abrasive grains made of zirconia, alumina or the like adhered thereto. The rail upper surface polishing tool 20 has the hollow portion 20a for nut replacement formed on the lower side of the nut 32, but the present invention is not limited to this, and the entire lower surface of the pad 28 is cushioned without forming the hollow portion 20a. It is also possible to form the layer 29 and the polishing sheet 31.

As shown in FIG. 4, the rail side polishing tool 21 includes a pad 34 made of synthetic resin or aluminum, a cushion layer 35 bonded to a circular lower surface 34 a of the pad 34, and an outer peripheral surface 35 a of the cushion layer 35. And the elastic sheet 37 bonded to the lower surface 35b of the cushion layer 35. The pad 34 is provided with an insertion hole 34b into which the output shaft (not shown) protruding from the gear box 25 of the transmission 24 is inserted in the output portion connecting boss portion 34c, and the output shaft is screwed to the output shaft. The nut 32 to be worn is embedded.

The cushion layer 35 is formed of sponge, foamed synthetic resin, or the like with an appropriate thickness T2 (for example, T2 = 30 mm) and an outer diameter D2 (for example, D2 = 100 mm). The polishing sheet 36 has abrasive grains made of zirconia, alumina, or the like bonded to a substrate made of cloth, paper, or the like. The elastic sheet 37 is formed of an elastic material having an appropriate rigidity such as a rubber sheet or a rubberized cloth. The rail side polishing tool 21 has the nut replacement hollow portion 21a formed below the nut 32, but the invention is not limited to this, and the entire lower surface of the pad 34 is cushioned without forming the hollow portion 21a. It is also possible to form the layer 35 and the elastic sheet 37.

Next, a rail polishing work method using the rail polishing apparatus 1 of this embodiment will be described. When polishing the rail upper surface Ra, as shown in FIG. 5, the polishing machine 3 is mounted on the hand truck 2 and the rail upper surface polishing tool 20 is mounted. To attach the polishing machine 1 to the hand truck 2, while holding the extension rod 19 of the polishing machine 3 with the front attaching / detaching tool 9, the butterfly bolt 14 of the rear attaching / detaching tool 10 is inserted through the long hole 13a. It is done by screwing it on the fixture 26 of. In this state, the hand cart 2 is placed on the rail R, and the butterfly bolt 14 of the rear attaching / detaching tool 10 is attached so that the polishing surface of the lower surface of the rail upper surface polishing tool 20 comes into contact with the rail upper surface Ra with appropriate pressing force. Readjust. Next, the drive source 18 is activated to rotate the rail upper surface polishing tool 20 at an appropriate number of revolutions (eg, about 5000 revolutions per minute), and the hand truck 2 is manually pushed at an appropriate rate (eg, 2 to 3 km / hour). The rail upper surface Ra is polished by the polishing tool 20 while moving.

As shown in FIG. 3, the polishing tool 20 for rail upper surface during polishing has the polishing sheet 31 joined to the lower surface 29a of the cushion layer 29, so that the polishing sheet 31 is attached to the rail upper surface Ra. It can be pressed with an appropriate pressing force. Therefore, even if the travel of the hand cart 2 is temporarily stopped, the rail upper surface polishing tool 20 does not polish the rail upper surface Ra more than necessary, and no step is formed on the rail upper surface Ra. Therefore, the rail polishing apparatus 1 can uniformly polish the rail upper surface Ra over the entire region by simply moving the hand truck 2 in one direction once.

When the rail upper surface polishing work is completed and the rail polishing apparatus 1 is carried out from the site, as shown in FIG. 6, the hand pushing arms 16 and 16 of the hand pushing handle 11 are folded and the stand 12 is set up.

When polishing the rail side surface Rb, as shown in FIGS. 1 and 7, the polishing machine 3 is removed from the hand truck 2 and the rail side polishing tool 21 is attached. Next, the grips 22 and 23 of the polishing machine 3 are gripped, the drive source 18 is activated, and the polishing surface on the side surface of the rotating rail side polishing tool 21 is pressed against the rail side surface Rb to perform polishing. As shown in FIG. 4, the polishing tool 21 for the rail side surface during polishing has the polishing sheet 36 bonded to the outer peripheral surface 35a of the cushion layer 35 and the elastic sheet 37 bonded to the lower surface of the cushion layer 35. The rotating polishing sheet 36 can be pressed against the rail side surface Rb with an appropriate pressing force.

[0029]

[Effect of device]

 As described in detail above, the present invention has the following practical effects. The rail polishing apparatus according to claim 1 is used for polishing work on the rail upper surface and rail side surface only by attaching / detaching the polishing machine to / from the hand cart and replacing the rail upper surface polishing tool or the rail side surface polishing tool with respect to the polishing machine. As a result, labor can be saved for on-site transportation and maintenance inspection. In the rail top polishing tool according to claim 2 and the rail side polishing tool according to claim 3, since the polishing sheet is backed up by the cushion layer, the rail top polishing tool is easily fitted to the rail top surface or the side surface, and the conventional polishing tool can be easily used. It is less likely to be chipped during polishing like a hard whetstone, allowing safe polishing work.

In the polishing tool for rail upper surface according to the second aspect, since the polishing sheet is pressed against the rail upper surface by the cushion layer which is easily deformed, the polishing amount when the traveling is stopped does not become unnecessarily large. Uniform polishing can be performed by moving the rail upper surface only once. In the polishing tool for rail upper surface according to the second aspect, since the polishing sheet is replaceably joined to the lower surface of the cushion layer via the hook-and-loop fastener, the polishing sheet can be replaced easily and quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a rail polishing device according to the present invention, showing a state in which a hand cart and a polishing machine are separated.

FIG. 2 is an enlarged cross-sectional view showing a cross section of a hand truck according to the embodiment.

FIG. 3 shows an embodiment of a polishing tool according to the present invention, and is a vertical cross-sectional view of the polishing tool for rail upper surface.

FIG. 4 shows an embodiment of a polishing tool according to the present invention, and is a vertical cross-sectional view of a rail side polishing tool.

FIG. 5 is a perspective view showing a state in which the rail upper surface is polished using the rail polishing apparatus according to the present invention.

FIG. 6 is a perspective view showing an embodiment of a rail polishing device according to the present invention, showing a state in which a hand pushing arm is bent and a stand is erected.

FIG. 7 is a perspective view showing a state where the side surface of the rail is polished by using the rail polishing apparatus according to the present invention.

[Explanation of symbols]

 2 ... Push cart 3 ... Polishing machine 18 ... Drive source 19 ... Extension rod 20 ... Rail upper surface polishing tool 21 ... Rail side surface polishing tool 22, 23 ... Handle 24 ... Transmission tool 28 (34) ... Pad 29 (35) ... Cushion layer 30 ... Surface fastener 31 (36) ... Polishing sheet 37 ... Elastic sheet A ... Rod center contraction of extension rod B ... Rotating shaft center line of polishing tool C ... Downward working angle

Claims (3)

[Scope of utility model registration request] 1. A hand truck that can be mounted on and off one rail, and a polishing machine that is detachably mounted on the hand truck. The polishing machine has a handle provided at a proper position, and a drive source. An extension rod extending from the drive source, a rail upper surface polishing tool and a rail side surface polishing tool that are exchangeably attached to the tip of the extension rod, and a driving force of the drive source to the attached polishing tool. When the polishing machine is mounted on a hand cart and the rail upper surface polishing tool is attached, the rail upper surface can be polished by the lower surface of the polishing tool with the extension rod tilted downward. At the same time, when the polishing machine is removed from the hand cart and the rail side polishing tool is attached, the rail side is polished so that the rail side surface can be polished by the side of the polishing tool while the extension rod is inclined downward. Center line of the rotation axis of the polishing tool with respect to the center line Rail polishing apparatus which is characterized in that is crossed by a downward working angle. 2. A polishing tool for rail upper surface, wherein a pad having a boss portion for connecting an output portion, a cushion layer joined to a lower surface of the pad, and a lower surface of the cushion layer are replaceably joined via a surface fastener. A polishing tool for rail upper surface, comprising: 3. A rail side polishing tool, a pad having an output portion connecting boss, a cushion layer bonded to the lower surface of the pad, a polishing sheet bonded to the outer peripheral surface of the cushion layer, and the cushion. A rail side polishing tool, comprising: an elastic sheet bonded to the lower surface of the layer.