JP2022066664A - Jig for rail joint plate fitting work - Google Patents

Abstract

To provide a jig for safely and easily fitting a rail joint plate.SOLUTION: A jig for rail joint plate fitting work 1 used to attach joint plates to railroad rails by bolts penetrating the railroad rails and the joint plates and nuts screwed into the bolts while laying the joint plates in order to connect ends to side surfaces of the railroad rail arranged with the ends face each other, comprises: a hanging shaft 2 having a length L2 equal to or longer than a length that penetrates from one joint plate along both sides of the railroad rail to the other joint plate and is inserted into bolt holes of the joint plate and bolt holes of the railroad rail; a handle shaft 3 provided facing the hanging shaft 2 while being spaced at an interval equal to or more than an interval from the bolt holes of the railroad rail to an upper surface of the railroad rail; and a connection part 4 in which the hanging shaft 2 and the handle shaft 3 are connected and integrated at their respective ends.SELECTED DRAWING: Figure 1

Description

The present invention relates to a jig used for attaching a seam plate for connecting railroad rails arranged so as to abut each other.

Conventionally, a series of uninterrupted rails (long rails) have been used in important sections such as Shinkansen tracks. However, for various reasons such as rail manufacturing reasons, suppression of rail deformation due to thermal expansion, or replacement of worn rails, a plurality of rails of a predetermined length are connected to form a railroad track. are doing. A seam plate is used as a member for connecting the rails in this way. The seam plate is laid on both sides of the rail in a state of being hung between the ends of the rail, a bolt is passed through the seam plate and the rail, and a nut is screwed into the bolt to be tightened. The bolts are generally used in 4 to 6 bolts at one rail seam.

The shape and material of this seam plate are defined by the Japanese Industrial Standards (JIS). For example, the seam plate connecting the 60 kg / m rails weighs 21.5 kg per sheet, and the seam plate connecting the 50N rails weighs 14.3 kg per sheet. Therefore, in the work of fastening the seam plate to the rail, one worker usually puts the seam plate on the rail and maintains the state, and then another worker passes the bolt and tightens the nut. It was done by a group of two people.

The work of attaching the seam plate to the rail as described above is the work of applying a relatively heavy seam plate to the rail placed on the roadbed or sleepers and holding it, and fixing the held seam plate with bolts. Therefore, it is a tough work that the worker is forced to take a difficult posture such as kneeling on the roadbed and taking a bent posture. Moreover, it is an outdoor work that is affected by the weather such as under the scorching sun, rainfall, and snowfall, and it may also be work in a place with a poor foothold such as a ballast track or a sloped place. Therefore, in the past, the burden on the worker was heavy, and the seam plate could fall on the worker's foot, which was a dangerous work. There was probably room for improvement in terms of points.

An object of the present invention is to provide a jig for mounting a seam plate, which can eliminate such inefficient and tight work, reduce the burden on workers, and improve work efficiency. ..

In the present invention, in order to achieve the above object, a seam plate is attached to the side surface of a railroad rail arranged so that the ends face each other to connect the end portions, and the railroad rail and the seam plate are provided. In a rail seam plate mounting work jig used for attaching the seam plate to the railroad rail by a bolt penetrating the bolt and a nut screwed into the bolt, one of the seams attached to both side surfaces of the railroad rail. The suspension shaft portion having a length longer than the length penetrating from the plate to the other seam plate and being inserted into the bolt hole of the seam plate and the bolt hole of the railroad rail, and the bolt hole of the railroad rail from the bolt hole. The end portions of the handle shaft portion provided so as to face the suspension shaft portion at a distance equal to or greater than the distance to the upper surface of the railroad rail, and the suspension shaft portion and the handle shaft portion, respectively. It is characterized by having a connecting portion that is connected and integrated with.

According to the rail seam plate mounting work jig of the present invention, if the handle shaft portion is held with the suspension shaft portion inserted into the bolt hole of the seam plate, the seam plate can be hooked on the suspension shaft portion. Can be lifted while standing. Therefore, by using two jigs, the seam plate can be lifted in a state parallel to the railroad rail and attached to the side surface of the railroad rail. Since the suspension shaft has a length that penetrates the railroad rail and the two seams along both sides thereof, one of the seams is lifted as described above and attached to the railroad rail. Insert the tip of the hanging shaft into the bolt hole of the railroad rail. By doing so, the seam plate can be attached to the railroad rail in a state where the bolt holes of the railroad rail and the bolt holes of the seam plate are matched. By fixing the jig to the railroad rail in that state, one of the seams can be maintained in a state of being attached to the railroad rail. Since the suspension shaft portion has a sufficient length to penetrate the railroad rail and the two seams, the state in which one of the seams is held along with the railroad rails. Then, it greatly protrudes to the opposite side of the one seam plate. By fitting the bolt holes of the other seam plate into the protruding hanging shaft portion, the other seam plate can be attached to the other side surface of the railway rail. While the other seam plate is attached to the railroad rail in this way, the one seam plate is held in a state of being attached to the railway rail by a jig, so that the seam plate is attached by one worker. Can be done. It should be noted that the insertion of bolts and the tightening of nuts are easy in sequence in a state where each seam plate is suspended by the hanging shaft portion, that is, the worker does not lift the seam plate or strongly press it against the railroad rail. Can be done.

Further, in the present invention, if the locking portion and the stopping portion are provided, the jig can be reliably prevented from coming off, and the seam plate mounting work can be performed more safely, easily, and efficiently.

It is a front view which shows one Example of this invention. It is a perspective view which shows the usage situation of the jig. It is a side view of the railroad rail seam part which shows the usage situation of the jig. It is a front view of the railroad rail seam part which shows the usage situation of the jig. It is a side view of the railroad rail seam part which shows the other usage situation of the jig. It is a side view of the railroad rail seam part which shows the other usage situation of the jig. It is a side view of the railroad rail seam part which shows the completion state of the installation work of a seam plate.

Hereinafter, the present invention will be described in more detail based on an embodiment shown in the drawings.

The rail seam plate mounting work jig (hereinafter, may be simply referred to as a jig) according to the present invention is a railroad rail seam plate (hereinafter, may be simply referred to as a seam plate) manually by a worker. It is a jig used to lift and attach to the side of the railroad rail. Therefore, the jig according to the present invention has a structure in which a hanging shaft portion for suspending a railroad rail and a handle shaft portion for a worker to handle are integrated. An example thereof is shown in FIG.

The jig 1 shown in FIG. 1 is an example in which a steel round bar is bent to form an integral body, and the steel round bar has a thickness that can be inserted into a bolt hole of a railroad rail or a seam plate, or a bolt hole thereof. It is a steel round bar with an outer diameter that is almost equal to the inner diameter. The steel round bar is bent twice in the same direction at two points to form an almost U-shape. Therefore, the structure is such that two shaft portions 2 and 3 that are parallel to each other or face each other are connected at their respective ends and integrated. The longer shaft portion 2 shown in FIG. 1 is an insertion portion 2 corresponding to the suspension shaft portion in the present invention, and is inserted into the joint plate and the bolt hole of the railway rail. Its length is long enough to penetrate the railroad rail and each seam along its sides.

The other shaft portion 3 parallel to or facing the insertion portion 2 is the grip portion 3 corresponding to the handle shaft portion in the present invention, and the insertion portion 2 and the grip portion 3 are placed on their respective end sides. The portion connected by is the arm portion 4 corresponding to the connecting portion in the present invention. The length of the arm portion 4, that is, the distance between the insertion portion 2 and the grip portion 3 is set as follows. The jig 1 lifts the grip portion 3 with the insertion portion 2 inserted into the bolt hole of the joint plate, carries the suspended joint plate to the side surface of the rail, and inserts the insertion portion 2 into the bolt hole of the rail. Insert in. Therefore, between the insertion portion 2 and the grip portion 3, the portion from the bolt hole of the rail to the head and the hand or finger of the worker holding the grip portion 3 can be inserted, so that the insertion portion 2 and the grip portion 3 can be inserted. The distance from 3 is set so as to secure a space where an operator can put his / her hand on the grip portion 3 even when the insertion portion 2 is inserted into the bolt hole of the rail. The grip portion 3 is covered with an appropriate cover 5 for easy holding.

A flange portion 6 is provided as a locking portion at the tip end portion (end portion on the opposite side of the arm portion 4) of the grip portion 3. The flange portion 6 is a disk-shaped portion larger than the outer diameter of the grip portion 3, and when the jig 1 is tilted so that the grip portion 3 comes into contact with the upper surface of the rail, the flange portion 6 is the head of the rail. It is designed to be caught on the side. That is, in a state where the insertion portion 2 is inserted sufficiently deep into the bolt hole of the rail, the tip portion of the grip portion 3 and the flange portion 6 provided therein cross the upper part of the head of the rail in the width direction on the insertion side. The lengths of the insertion portion 2 and the grip portion 3 are set so as to protrude to the opposite side. The insertion portion 2 is set to have a cross-sectional shape or an outer diameter that can be rotated inside the bolt hole of the seam plate or the bolt hole of the rail, and therefore the jig 1 can be rotated around the insertion portion 2. When the jig 1 is rotated in this way to bring the grip portion 3 into contact with the upper surface of the rail, the flange portion 6 is lowered to a position facing the side surface of the head of the rail and engages with the width direction of the rail. It will be.

The flange portion 6 may have a configuration in which a disk is joined to or fitted to the tip portion of the grip portion 3 and integrated into the grip portion 3, but in the embodiment described here, the flange portion 6 may be integrated. Is attached to the grip portion 3 by a screw. As shown in FIG. 1, a screw shaft 6a is vertically provided at the center of one side surface of the flange portion 6. On the other hand, a screw hole 6b is formed in the central portion of the tip surface of the grip portion 3. By screwing the screw shaft 6a into the screw hole 6b, the flange portion 6 is integrated with the grip portion 3. The lengths of the screw shaft 6a and the screw hole 6b are sufficiently long, and the screw shaft 6a is screwed into the screw hole 6b so as to leave a predetermined space between the side surface of the flange portion 6 and the tip surface of the grip portion 3. Even if there is, the state in which the flange portion 6 is attached to the grip portion 3 can be maintained. That is, it is configured so that the substantial length of the grip portion 3 or the interval indicated by the reference numeral L1 described later can be adjusted. In such a configuration, for example, a shim (not shown) for adjusting the height of one of the rails Ra (or Rb) is sandwiched between the rail Ra (or Rb) and the seam plate. The seam plate becomes a rail because the shim that was sandwiched last time is no longer used this time, or the type of rail Ra (or Rb) is different and the thickness of the seam plate F, F'changes. This is because even if the thickness of the shim is separated from or close to the side surface of Ra (or Rb), the above-mentioned interval L1 is adjusted to cope with it.

On the other hand, a stopper 7 corresponding to the stop portion in the present invention is provided at the end portion of the insertion portion 2 on the arm portion 4 side. The stopper 7 is a disk-shaped (or ring-shaped) portion having an outer diameter larger than the inner diameter of the bolt hole in the seam plate, and the seam plate in which the insertion portion 2 is inserted into the bolt hole is caught by the stopper 7. Further, it cannot be moved to the arm portion 4 side.

Here, the distance L1 between the flange portion 6 and the stopper 7 (distance measured in the axial direction of the insertion portion 2) will be described. The flange portion 6 and the stopper 7 are for holding the seam plate along the side surface of the rail so as not to fall off from the rail. Therefore, the distance L1 between the flange portion 6 and the stopper 7 is the side surface of the rail. The distance between the side surface on which the stopper 7 is hooked on the seam plate attached to the rail and the side surface of the head of the rail (the side surface opposite to the side surface on which the seam plate is attached) is about or slightly smaller than that. It is said that the interval is large. Therefore, by rotating (tilting) the jig 1 so that the grip portion 3 comes into contact with the upper surface of the rail and engaging the flange portion 6 with the side surface of the head of the rail, the jig 1 is attached to the rail and one side surface thereof. The joined seam plate is sandwiched between the flange portion 6 and the stopper 7.

Explaining the dimensions of the other parts of the jig 1 shown in FIG. 1, by providing the stopper 7, the substantially insertion portion 2 is a portion on the tip end side of the stopper 7, which is substantially the same. The length L2 of the insertion portion 2 is the total width when the seam plate is attached to both side surfaces of the rail, that is, the length from the outer side surface of one seam plate to the outer side surface of the other seam plate. The above length, in particular, the length at which the tip portion of the insertion portion 2 protrudes from the outer side surface of the other seam plate to some extent is set.

Further, the minimum distance L3 from the surface of the insertion portion 2 to the outer peripheral edge of the flange portion 6 is such that a gap is formed between the upper surface of the rail and the flange portion 6 when the insertion portion 2 is inserted into the bolt hole of the rail. The interval is set so that there is a gap that does not interfere with the operation of inserting and removing the insertion portion 2 into the bolt hole of the rail, and more specifically, a gap that allows the grip portion 3 to be touched. ing.

Next, the operation or usage of the above-mentioned jig 1 according to the present invention will be described. In the following description, the work of attaching the seam plate to the rail seam portion will be described, but since the work of removing the seam plate from the seam only reverses the order, the description of the removal procedure will be omitted.

Since the seam plate F is a heavy and long member, two jigs 1 are used as one set. It is assumed that the new seam plate F or the reusable seam plate F removed from the old rail is laid on its side and placed in a flat position on the ground as shown in FIG. 2 (a). FIG. 2 shows an example of four bolt holes 8, and the insertion portion 2 of each jig 1 is inserted into, for example, two outer bolt holes 8 of the bolt holes 8. In that state, the jig 1 is so-called downward, and when the grip portion 3 is grasped by hand to raise the jig 1, the seam plate F is raised as shown in FIG. 2 (b). When the seam plate F is in the so-called vertical posture, the insertion portion 2 is almost horizontal or the tip portion thereof is in a slightly upward state. Therefore, hold the grip portion 3 by hand to cure the seam plate F. It can be lifted together with the tool 1.

The seam plate F carried by the jig 1 in this way is applied to the side surface of the seam portion of the rail Ra (or Rb) to be attached. The state is shown in FIG. 3, and when the insertion portion 2 is inserted into the bolt hole 9 provided in the rail Ra (or Rb) and further pushed in, the seam plate F caught on the stopper 7 is pushed by the stopper 7. And is pressed against the side surface of the rail Ra (or Rb).

When the insertion portion 2 is inserted into the bolt hole 8 of the rail Ra (or Rb) to the limit, the flange portion 6 provided at the tip of the grip portion 3 has the rail Ra (or Rb) above the rail Ra (or Rb). It crosses in the width direction of the rail and is located on the other side surface side (left side surface side in FIG. 3) of the head of the rail Ra (or Rb).

After setting the seam plate F and the jig 1 in this way, the jig 1 is tilted so that the grip portion 3 comes into contact with the upper surface of the rail Ra (or Rb). That is, the jig 1 is rotated around the insertion portion 2. The state is shown in FIG. As described above, the flange portion 6 crosses the upper part of the rail Ra (or Rb) in the width direction and protrudes to the other side surface side. Therefore, when the jig 1 is tilted as shown by the arrow in FIG. 4, the flange portion 6 is tilted. The lower portion of the portion 6 faces the side surface of the head of the rail Ra (or Rb). That is, when the jig 1 tries to move in the direction of pulling out the insertion portion 2 from the bolt hole 8 of the rail Ra (or Rb), the flange portion 6 engages with the side surface of the head of the rail Ra (or Rb) and pulls out. You will not be able to. Since the distance L1 between the flange portion 6 and the stopper 7 on which the seam plate F is hooked is the above-mentioned distance, the rail Ra (or Rb) and the seam plate F attached to the side surface thereof are the flange portion. It is sandwiched between the 6 and the stopper 7. That is, the seam plate F is not yet bolted to the rail Ra (or Rb), but is held along the side surface of the rail Ra (or Rb).

FIG. 5 shows a state in which the seam plate F is held along the side surface of the rail Ra (or Rb) by the jig 1, and in this state, the tip portion of the insertion portion 2 is held by the rail Ra (or Rb). It greatly protrudes to the other side surface side of Rb) (the side surface side to which the seam plate F is not yet attached). Utilizing the protruding tip portion, the other seam plate F'is attached to the other side surface of the rail Ra (or Rb). That is, the other seam plate F'is lifted by hand, the tip of the insertion portion 2 is inserted into one of the bolt holes, and the other seam plate F'is used as a guide for the rail Ra (or Rb). ) Along the other side. In that case, since the other seam plate F'is abutting against or rubbing against the insertion portion 2, a load in the direction of coming out of the bolt hole 8 of the rail Ra (or Rb) acts on the insertion portion 2 (jig 1). In some cases. However, since the jig 1 is engaged with the rail Ra (or Rb) by the flange portion 6 and does not move in the width direction of the rail Ra (or Rb), the insertion function as a guide for the other seam plate F'. The portion 2 does not come out or fall out of the bolt hole 8 of the rail Ra (or Rb). In this way, the state in which the other seam plate F'is also attached to the side surface of the rail Ra (or Rb) is shown in FIG.

The other seam plate F'can also be lifted by using another jig 1. In that case, the bolt hole 8 of the other seam plate F'is already engaged with the rail Ra (or Rb). Insert the insertion portion 2 of another jig 1 into the bolt hole 8 that does not interfere with the insertion portion 2 of the jig 1. Further, the insertion portion 2 is inserted into the bolt hole 9 of the rail Ra (or Rb). Then, using each insertion portion 2 as a guide, the other seam plate F'is attached to the side surface of the rail Ra (or Rb).

As shown in FIG. 6, in a state where the seam plates F and F'are attached to both side surfaces of the rail Ra (or Rb) using two jigs 1, the bolt holes 8 and 9 have the same axis. Since the wires are almost the same, the bolt B is inserted into the so-called unused or released bolt holes 8 and 9 in which the insertion portion 2 of the jig 1 is not inserted, and the nut N is attached to the bolt B. Temporarily fix each seam plate F, F'. After that, the jig 1 is removed from the rail Ra (or Rb), the bolt B is inserted into the bolt holes 8 and 9 in place of the jig 1, and the nut N is attached to those bolts B. Finally, the nuts N are tightened in order to end the connection of the rail Ra (or Rb) by the seam plates F, F'. This state is shown in FIG.

Since the jig 1 according to the present invention is configured to fit the seam plate F along the rail Ra (or Rb) by utilizing the bolt holes 8 of the rail Ra (or Rb), the structure or each part thereof. The dimensions and the like of are matched to the rail Ra (or Rb). There are several types of rails (or Rb) used in Japan as a whole, from the Shinkansen to local local lines, but there are at most two types in one line section, so at each track maintenance site. The types of jigs 1 to be prepared do not have to be so many.

As described above, the jig 1 according to the present invention has a sufficiently long insertion portion 2 integrated with the grip portion 3, so that the jig 1 is suspended by the insertion portion 2 and is suspended from the side surface of the rail Ra (or Rb). The seam plate F attached to the above can be held in that state. Therefore, after one of the two seam plates F, F'is attached to the side surface of the rail Ra (or Rb), the other seam plate F'is attached to the other side surface of the rail Ra (or Rb). Until then, the operator can be away from the rail Ra (or Rb) or its seam portion, and the rail Ra (or Rb) is in an unnatural posture such as bending over the heavy seam plates F, F'. ) Can be released from the work such as pressing. Further, since the bolt B is devised so that the head does not rotate freely due to the shape of the head or the like, it can be fastened only by tightening the nut N side. Therefore, by using the jig 1 according to the present invention, one person can safely carry out a series of operations from carrying the seam plates F and F', assembling to the rail Ra (or Rb), and fastening. can. In addition, since the amount of hard work due to an unnatural posture is reduced, the burden on the worker is reduced, and accordingly, quick and efficient work becomes possible.

The present invention is not limited to the above-described embodiment, and the hanging shaft portion, the handle shaft portion, and the connecting portion are not made from a single steel round bar, but are made as separate members and integrated. May be good. Therefore, their cross-sectional shapes are not limited to circular shapes. Further, the locking portion and the stopping portion in the present invention do not need to be formed in the shape of a disk such as a flange portion, and may have an appropriate shape such as a pin or a protrusion. Further, the material of the locking portion and the stopping portion may be a material such as a synthetic resin different from the hanging shaft portion and the handle shaft portion. Further, the jig according to the present invention is not limited to the seam plates F and F', and can be used for transporting and handling track materials having a plurality of bolt holes such as spacing materials.

Further, the present invention described with reference to the above-mentioned examples includes the following inventions in addition to the inventions described in the claims.

The suspension shaft portion in the present invention is a rail joint plate mounting work jig characterized by being composed of a bolt hole of a railroad rail and a shaft member having an outer diameter corresponding to the inner diameter of the bolt hole of the joint plate. ..

In the present invention, the handle shaft is engaged with the side surface of the rail head by bringing the handle shaft close to the upper surface of the rail at the end opposite to the connecting portion of the handle shaft. A rail seam plate mounting work jig characterized by being provided with a locking portion that prevents the railroad rail from moving in the width direction.

In the present invention, a stopper portion is provided at the end portion of the suspension shaft portion on the connecting portion side so as to be hooked on the open end of the bolt hole in the seam plate into which the suspension shaft portion is inserted. The distance between the stop portion and the stop portion measured in the axial direction of the suspension shaft portion is one of the seams along the side surface of the head with which the locking portion engages and the side surface of the railroad rail. A jig for mounting a rail seam plate, characterized in that the distance between the bolt hole on the plate and the opening end of the bolt hole on which the stopper is hooked can be adjusted.

1 ... Jig 2 ... Insertion part (hanging shaft part)
3 ... Grip part (shaft part for handle)
4 ... Arm part (connecting part)
5 ... Cover 6 ... Flange 7 ... Stopper 8, 9 ... Bolt hole B ... Bolt F, F'... Seam plate N ... Nut Ra, Rb ... Rail

Claims (1)

A seam plate is attached to the side surface of a railroad rail arranged so that the ends face each other to connect the ends to each other, and the railroad rail, a bolt penetrating the seam plate, and a nut screwed into the bolt are used. In the rail seam plate mounting work jig used to mount the seam plate to the railway rail.
Suspension that is longer than the length that penetrates from one seam plate along both sides of the railroad rail to the other seam plate and is inserted into the bolt holes of the seam plate and the bolt holes of the railroad rail. Shaft part and
A handle shaft portion provided so as to face the suspension shaft portion at a distance equal to or greater than the distance from the bolt hole of the railroad rail to the upper surface of the railroad rail.
A jig for mounting a rail seam plate, which comprises a connecting portion in which the hanging shaft portion and the handle shaft portion are connected and integrated at their respective ends.

Images