JP6673763B2 - Insulation cover - Google Patents

Description

  The present invention relates to an insulating cover for temporarily insulating a rail from a wheel.

  2. Description of the Related Art In a railway, a railway signal security device is provided to keep the safety of train operation. The railway signal security device is a general term for a signal device, a blocking device, a switching device, an interlocking device, a railroad crossing security device, a track circuit device, and the like (see No. 1001 of Non-Patent Document 1). The track circuit device has a track circuit for detecting a train. The track circuit is an electric circuit using a rail (see No. 7001 in Non-Patent Document 1). Trains are detected by shorting the left and right rails with wheels and axles.

  At the boundary of the track circuit, the rail joint is electrically insulated (see No. 7019 in Non-Patent Document 1). The rail joint is a connecting portion between the rails (see reference numeral 210 in Non-Patent Document 2). A rail joint called an insulating joint is used at an insulated portion of the track circuit (see reference numeral 212 in Non-Patent Document 2).

  A maintenance vehicle is used for maintenance work of the track (see No. 11808 of Non-Patent Document 3). Conventional line maintenance vehicles travel on wheels on rails without shorting the rails. The movement of the maintenance vehicle is different from the operation of the train, and if the maintenance vehicle short-circuits the rail in the case of a conventional line, a railway signal security device such as a railroad crossing protection device malfunctions.

  For example, there is a multiple tie tamper in a maintenance vehicle (see No. 513 of Non-Patent Document 2). The multiple tie tamper is a large-scale machine that continuously solidifies a ballast ballast. Conventionally, when a multiple tie tamper passes through an insulated portion, a cloth adhesive tape (gum tape) is stuck three times on the rail tread surface at the insulated seam to prevent the insulated seam from being straightened by a wheel. However, the cloth adhesive tape is difficult to remove from the rail after passing through the multiple tie tamper, is difficult to stick to the rail during rainfall, and has a problem in that the insulation performance is reduced by rainwater and the function of preventing straightening of the insulation seam is reduced. Furthermore, in recent years, the short-circuit sensitivity at level crossings has been increased in order to prevent level crossing accidents, and cloth adhesive tapes have not been able to say that insulation performance is sufficient.

  A rail joint insulating cover has been proposed to prevent straightening of an insulating joint by a wheel of a maintenance vehicle (construction vehicle) (see Patent Document 1). This rail joint insulating cover insulates the rail surface at the rail joint with the cover body. Since the cover body is formed by laminating a plurality of sheet bodies, the sheet bodies are easily damaged (see paragraph 0009 of Patent Document 1). In addition, the rail joint insulating cover is hooked in a gap between the rail and the joint plate to prevent the cover body from falling off, so that the mounting is complicated.

  Further, when performing an insulation test on a maintenance vehicle, it is necessary to insulate the wheels from the rails. For this reason, the used insulation material (insulation fiber) of the insulation seam is reused, the insulation material is laid on the rail head, and the wheel of the maintenance vehicle is mounted on the rail. However, such an insulating material is likely to fall off when riding on a wheel, so that riding on the wheel is repeated many times, which makes the inspection work inefficient.

  In addition, in the slab section of the Shinkansen railway, after the rails have been trimmed, the slabs are cleaned and then the signal level of the track circuit is measured. The maintenance car of the Shinkansen is used during the working hours when the train is not operated, and unlike the maintenance car of the conventional line, the rail is short-circuited. Therefore, when the maintenance vehicle is on the track circuit to be measured, the signal level of the track circuit cannot be measured. Therefore, it is necessary to move the maintenance vehicle out of the track circuit to be measured before the signal level measurement, which makes the measurement operation inefficient.

  The above-described rail joint insulating cover (see Patent Document 1) cannot be attached to a portion other than the rail joint because the hook is hooked in the gap between the rail and the joint plate to prevent the cover from falling off. For this reason, this rail joint insulating cover cannot be used for insulation inspection of a maintenance vehicle or for insulation between wheels and rails when measuring a signal level in a Shinkansen railway.

JP 2008-266883 A

JIS E 3013: 2001 "Terminology of railway signal security" JIS E 1001: 2001 "Terminology of railway-track" JIS E 4001: 2011 "Rolling stock-terms"

  The present invention is intended to solve the above-mentioned problems, and can be used for other than rail joints, in which rails can be insulated from wheels, insulation performance is good, durability is moderately good, it can be easily attached and detached, falling off is prevented. It is an object of the present invention to provide an insulating cover capable of performing the following.

The insulating cover of the present invention is a cover for insulating the rail from the wheel of the maintenance vehicle , and is formed by integrally molding a synthetic resin having insulation and elasticity, and a top cover that covers the top surface of the rail. A pair of side covers extending downward from both ends in a direction perpendicular to the rail longitudinal direction in plan view of the top cover and covering a predetermined range of the side surface of the rail head, and the top cover is A slope portion whose thickness gradually decreases toward an end in the longitudinal direction of the rail, and a flat middle portion are formed; the side cover has a gap between opposing lower ends set to be smaller than the width of the rail head; Is fitted onto the rail head from above.

  In this insulating cover, the synthetic resin is preferably a polyamide resin.

  In this insulating cover, the inner surface formed by the top cover and the side cover is preferably formed so that its cross-sectional shape corresponds to the cross-sectional shape of the head of the 50 kgN rail and the 60 kg rail.

  In this insulating cover, it is preferable that the synthetic resin is colored in a fluorescent color.

  ADVANTAGE OF THE INVENTION According to the insulating cover of this invention, it is what molded the synthetic resin which has an insulating property, and it has a top cover and a pair of side covers, and is fitted to a rail head, so that a rail is insulated from a wheel. be able to. Since the insulating cover is formed by integrally molding a synthetic resin, the insulating performance and the durability can be improved as compared with those obtained by laminating sheet-like insulating materials or cloth adhesive tape. Further, since this insulating cover is fitted to the rail head from above, it can be easily attached and detached. This insulating cover has elasticity, and the interval between the lower ends of the opposing side covers is set to be smaller than the width of the rail head, so that the rail head is sandwiched between the side covers while being fitted to the rail head. Attachment is prevented. Further, since the insulating cover does not use the structure of the insulating seam for attachment to the rail head, it can be used for other than the rail seam.

The top view of the insulating cover concerning one embodiment of the present invention. The side view of the insulating cover. The front view of the same insulating cover. Sectional drawing of the rail to which the insulating cover was attached. The side view of the rail to which the insulating cover was attached. The top view of the rail with the same insulating cover attached.

  An insulating cover according to an embodiment of the present invention will be described with reference to FIGS. This insulating cover is a cover for insulating the rail from the wheel, and is formed by integrally molding a synthetic resin having insulating properties and elasticity. As shown in FIGS. 1 and 2, the insulating cover 1 has a top cover 2 and a pair of side covers 3. The top surface cover 2 is a portion that covers the top surface of the rail. The side cover 3 extends downward (in the −z direction in FIG. 2) from both ends in a direction (y direction in FIG. 1) orthogonal to the rail longitudinal direction (x direction in FIG. 1) in plan view of the top cover 2. And covers a predetermined range of the side surface of the rail head. As shown in FIG. 3, the interval S between the lower ends of the opposing side covers 3 is set smaller than the width of the rail head. As shown in FIGS. 4 to 6, the insulating cover 1 is fitted to the rail head 4 from above.

  The top cover 2 is formed with a slope portion 21 whose thickness gradually decreases toward the end in the rail longitudinal direction (see FIG. 2).

  The insulating and elastic synthetic resin that is the material of the insulating cover 1 is, for example, a polyamide resin.

  The inner surface 11 composed of the top cover 2 and the side cover 3 is formed such that its cross-sectional shape corresponds to the cross-sectional shape of the head of the 50 kgN rail and the 60 kg rail (see FIG. 4).

  The synthetic resin as the material of the insulating cover 1 is colored in a conspicuous color, for example, a fluorescent color.

  The insulating cover 1 will be described in more detail. In this embodiment, the insulating cover 1 is made by integrally molding a synthetic resin using a mold. The synthetic resin is a polyamide resin and is colored in yellow fluorescent color. The material of the insulating cover 1 may be a synthetic resin having insulating properties and elasticity, and is not limited to a polyamide resin. The color of the insulating cover 1 is not limited to the yellow fluorescent color as long as it can be distinguished from the rail, but a conspicuous color is desirable.

  The insulating cover 1 of the present embodiment has a total length of 200 mm in the rail longitudinal direction (x direction in FIG. 1), a length of each sloped portion 21 of 50 mm, a length of a flat middle portion 22 of 100 mm, and a length of the middle portion 22. The thickness is 3 mm. Note that the length and thickness of the insulating cover 1 are not limited thereto.

  The insulating cover 1 of the present embodiment is formed in a shape to be attached to the head of a 50 kgN rail and a 60 kg rail. The 50 kgN rail and the 60 kg rail are specified in Japanese Industrial Standard JIS E 1101: 2001. The 50 kgN rail and the 60 kg rail are types of rails often used in Japan. Since the head width of the 50 kgN rail and the 60 kg rail are the same (65 mm) and the cross-sectional shape of the head is almost the same, the insulating cover 1 must have a shape that can support both types of rails. Can be.

  Since the insulating cover 1 is a cover for insulating the rail from the wheel, the predetermined range covered by the side cover 3 is, of course, at least a range where the flange of the wheel may come into contact with the side surface of the rail head 4. is there. The height H of the side cover 3 is set so as to cover a predetermined range (see FIGS. 3 and 4). In the present embodiment, the height H of the side cover 3 is about 30 mm corresponding to the 50 kgN rail and the 60 kg rail. The height H may be set so that the side cover 3 covers the entire side surface of the rail head 4.

  When the insulating cover 1 configured as described above is fitted to the rail head 4 from above, the interval S between the opposing side covers 3 is expanded by elasticity, and the insulating cover 1 is attached so as to sandwich the rail head 4. Therefore, in the design of the insulating cover 1, the interval S between the lower ends of the side covers 3 before the insulating cover 1 is fitted to the rail head 4 is determined by the width of the rail head 4, the range in which the insulating cover 1 is elastically deformed, and the rail. It is set to an appropriate value from the viewpoint of the elastic force sandwiching the head 4. For example, in the present embodiment, the interval S between the lower ends of the side covers 3 is set to 61 mm with respect to the width 65 mm of the rail head 4 of the 50 kgN rail and the 60 kg rail. The value of the interval S is not limited to this.

  4 to 6 show a state where the insulating cover 1 is attached to the insulating joint. The mounting position of the insulating cover 1 may be the rail head 4 and the seam plate 5 is not used for mounting, so the mounting position is not limited to the rail head 4 at the insulating seam.

  The rail has an abdomen 6 and a bottom 7 in addition to the head 4. Since the wheels on the rail can contact the abdomen 6 and bottom 7 of the rail (see FIG. 4), there is no need to insulate the abdomen 6 and bottom 7 of the rail.

  As described above, according to the insulating cover 1 according to the embodiment, the synthetic resin having insulating properties is integrally molded, has the top cover 2 and the pair of side covers 3, and is fitted to the rail head 4. The rails can be insulated from the wheels. Since the insulating cover 1 is formed by molding a synthetic resin, the insulating performance and the durability can be improved as compared with those obtained by laminating sheet-like insulating materials or cloth adhesive tape. Since the insulating cover 1 is fitted to the rail head 4 from above, it can be easily attached and detached. The insulating cover 1 has elasticity, and the interval between the lower ends of the opposing side covers 3 is set to be smaller than the width of the rail head 4. It is sandwiched between the side covers 3 to prevent falling off. Furthermore, since the insulating cover 1 does not use the structure of the insulating seam for attachment to the rail head 4, the insulating cover 1 can be used for other than the rail seam. Therefore, this insulating cover 1 can be used not only to prevent the maintenance vehicle from being stripped of the insulation seam, but also to perform insulation inspection of the maintenance vehicle and insulation between wheels and rails when measuring a signal level in a Shinkansen railway. it can.

  Since the top cover 2 is formed with the slope portion 21 whose thickness gradually decreases toward the end in the rail longitudinal direction, the wheel of the maintenance vehicle can easily ride on the insulating cover 1.

  Since the synthetic resin that is the material of the insulating cover 1 is a polyamide resin, it has elasticity, and has moderately good insulating performance and durability.

  Since the inner surface 11 of the insulating cover 1 is formed so that its cross-sectional shape corresponds to the cross-sectional shape of the head of the 50 kgN rail and the 60 kg rail, it can be used for either standard rail.

  If the synthetic resin, which is a material of the insulating cover 1, is colored in a fluorescent color, it is conspicuous, so that it is possible to prevent the user from forgetting to remove the insulating cover 1 from the rail at the end of the maintenance work. Also, by coloring the material of the insulating cover 1, there is no discoloration due to peeling of the coating film as in the case of painting.

  The insulating cover is used to insulate the rail from the wheel of the maintenance vehicle during maintenance work of the track, that is, temporarily. If the user forgets to remove the insulating cover after the maintenance work, the train wheels may be insulated to cause a short circuit fault in the track circuit. Therefore, in order to temporarily insulate the rail, an easily breakable material such as a cloth adhesive tape has been used.

  Therefore, an insulating cover for temporarily insulating the rail from the wheel of the maintenance vehicle is not necessarily better as the durability is higher. Since the insulating cover 1 of the present invention is formed by integrally molding a synthetic resin, the durability is maintained to the extent that a maintenance vehicle can withstand a slow rise, but a train having a large number of wheels can travel at high speed. It is not expected to withstand passing. Such appropriate durability of the insulating cover 1 is taken into consideration in setting the thickness and selecting a synthetic resin.

  The present invention is not limited to the configuration of the above embodiment, and various modifications can be made without departing from the spirit of the invention. For example, the shape and dimensions may be set so that the insulating cover 1 is used for a standard rail other than the 50 kgN rail and the 60 kg rail.

REFERENCE SIGNS LIST 1 insulating cover 11 inner surface of insulating cover 2 top cover 21 slope section 3 side cover 4 rail head

Claims (4)

An insulating cover for insulating the rail from the wheel of the maintenance vehicle ,
It is made by integrally molding a synthetic resin having insulation and elasticity,
A top cover that covers the top of the rail,
A pair of side covers extending downward from both ends in a direction perpendicular to the rail longitudinal direction in plan view of the top cover and covering a predetermined range of the side surface of the rail head,
The top cover has a slope portion whose thickness gradually decreases toward the longitudinal end of the rail, and a flat middle portion ,
In the side cover, an interval between opposed lower ends is set to be smaller than a width of the rail head,
The insulating cover is fitted onto the rail head from above.   The insulating cover according to claim 1, wherein the synthetic resin is a polyamide resin.   The inner surface formed by the top cover and the side cover is formed so that a cross-sectional shape thereof corresponds to a cross-sectional shape of a head of a 50 kgN rail and a 60 kg rail. Item 3. The insulating cover according to Item 2.   The insulating cover according to any one of claims 1 to 3, wherein the synthetic resin is colored in a fluorescent color.

Images