JPH11280005A - Oscillating mechanism and rail end head heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rail end head heating device capable of performing quenching at the uniform heating temperature and by the uniform heating depth in a rail end head, in a rail laying site. SOLUTION: A rail end head heating device is provided with a parallel slider 11 so mounted as to be reciprocated along a guide part 20, a rotational plate 5 to be rotated by a motor 3, an interlocking rod 7 for converting a rotational motion into a reciprocating linear motion, and a connecting part (a supporting piece 13) for connecting the parallel slider and the interlocking rod to each other. A first spring I1 is mounted on the front end side in relation to the connecting part of the interlocking rod, and a second spring 18 is mounted on the rear end side in relation to the connecting part of the interlocking rod. Therefore, the moving speed in a reciprocating linear motion of the parallel slider and the moving stroke between the reciprocating ends are adjusted by adjusting resiliency of the first and second springs, and heating to the rail head is performed by a heating burner 30 mounted on the slider.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rail head heating device used for quenching a rail head on a railway line, and more particularly to a flame type heating device mounted on the rail head heating device. The present invention relates to a structure of an oscillating mechanism capable of uniformly heating a rail end portion when a burner reciprocates linearly on a rail surface.

[0002]

2. Description of the Related Art In a rail used for a railway track, an end portion in a range of about 150 mm from the end of the rail is quenched, thereby improving hardness and improving durability of the rail (extending the rail life). A quenching process for extending the life has been conventionally performed. As shown in FIG. 11, an apparatus for performing this quenching treatment includes a stationary heating apparatus 100 for performing heating with a flame quenching burner, an air cooling apparatus 200 for performing forced air cooling with compressed air, and a plurality of transverse feeders. Roller 301
And rail transport means 300 comprising:
The heating device 100 includes a flame quenching burner 101 that injects a flame, and a gas supply device 102 that supplies a high-pressure gas. The air cooling device 200 includes a compressed air injection port 201 and a compressed air generation device 202. Further, a high frequency induction heating furnace may be used instead of the flame quenching burner, and a heating device using a high frequency generator may be used instead of the gas supply device.

When the quenching process is performed by using the above-described apparatus, first, a rail 400 is placed on a roller 301 of a rail transport means 300, and the rail end 401 is driven by the rotation of the roller 301. Set to the lower position. Next, the rail end face 4 of the rail head
The surface of the rail head having a length of about 150 mm (heating range) from 02 is heated by a flame burner 101 to about 1 mm.
Raise the temperature to 000 degrees. The protection plate 500 is brought into contact with the rail end face 402 to prevent overheating and erosion of the corner of the head of the rail end caused by the heating by the flame burner 101 to release the heat.

[0004] Next, by driving the roller 301, the rail end portion 401 is fed in the longitudinal direction of the rail so that the rail end portion 401 is located below the air cooling device. Then, air from the compressed air injection port 201 of the air cooling device 200 is injected to the surface of the rail end portion 401 at the heating range rail head surface, and the heating range portion is forcibly air-cooled and quenched. The hardness of the portion 401 can be improved.

[0005]

However, according to the quenching process of the end of the rail by the above-mentioned apparatus, since the rail 400 is moved in the lateral direction (longitudinal direction), the apparatus becomes a large-scale apparatus, and it is a stationary type. It had to be a device. Therefore, it has been common practice to perform a quenching process at a rail manufacturing factory on rails at the final stage of rail manufacturing (rails before laying) and ship the rails as edge-hardened rails.

On the other hand, when the rail laying place on a railway line is a curved section, in order to align the positions of the rail joints on the left and right, there is a situation where one of the rail ends is cut and laid at the laying site. As a result, the quenched portion of the end quenching rail must be removed, so that the quenching process in the rail manufacturing plant is wasted, and there is a problem that the rail life is shortened. That is, in the conventional heating device of the rail end hardening device, it is not possible to perform the heat treatment for hardening the rail end head on the laid rail or the laying site.

[0007] Further, in the heating device of the rail end hardening device, it is difficult to uniformly heat the head corner of the rail end 401, and as described above, the overheating melting of the head corner is performed. In order to prevent the loss, it is necessary to perform the heat treatment by placing the protection plate 500 in contact with the rail end surface 402 and mounting the same.

The present invention has been made in view of the above circumstances, and is suitable for a rail end head heating device capable of uniformly heating a rail end head at an installation site and a uniform heat treatment for a rail head surface. The purpose of the present invention is to provide a swing mechanism.

[0009]

According to a first aspect of the present invention, there is provided a swing mechanism, comprising: a parallel slider mounted so as to be capable of reciprocating linear movement along a guide; A swinging mechanism comprising: a rotating plate that performs the following, an interlocking rod that converts the rotational motion into the reciprocating linear motion, and a connecting portion that connects the parallel slider and the interlocking rod, including the following configuration. It is characterized by.
A first spring is mounted on the front end side of the reciprocating linear movement of the interlocking rod with respect to the connecting portion. A second spring is mounted on the rear end side of the reciprocating linear motion with respect to the connecting portion of the interlocking rod.

According to a second aspect of the present invention, in the swing mechanism according to the first aspect, the interlocking rod is provided with a rod length adjusting portion, and the interlocking rod is configured to be movable in the axial direction with respect to the connecting portion. And

According to a third aspect of the present invention, in the swing mechanism according to the first or second aspect, a repulsive force of the first spring is larger than a repulsive force of the second spring.

According to a fourth aspect of the present invention, in the swing mechanism according to the first or second or third aspect, a buffering means is provided at a position of a reciprocating linear movement end on the front end side with respect to the parallel slider. And

According to a fifth aspect of the present invention, in the swing mechanism according to the third aspect, a third spring having an elastic force substantially equal to the elastic force of the second spring is provided at a position of a reciprocating linear motion end on the front end side with respect to the parallel slider. It is characterized by wearing.

According to a fifth aspect of the present invention, there is provided a rail end heating device having the swinging mechanism according to any one of the first to fifth aspects, wherein the swinging mechanism is disposed outside the guide portion opposite to the interlocking rod with respect to the guide portion. The heating burner is mounted on the parallel slider so that the injection port of the heating burner is positioned.

According to the swing mechanism of the present invention, the connecting portion between the interlocking rod and the parallel slider for converting the rotary motion of the rotary plate into the reciprocating linear motion of the parallel slider is provided at the front end and the rear end thereof. Since the first spring and the second spring are mounted respectively, by adjusting the repulsive force of the first spring and the second spring, the moving speed in the reciprocating linear motion of the parallel slider and the moving stroke at the reciprocating end are adjusted. be able to. For example, in the linear motion at the reciprocating end, the moving speed can be adjusted without stopping the parallel slider, and the moving stroke on one side (for example, the forward end) can be changed.

In particular, when the elastic force of the first spring is set to be larger than the elastic force of the second spring, the moving speed of the parallel slider at the reciprocating linear movement end opposite to the interlocking rod with respect to the parallel slider is reduced, and In addition, the moving stroke of the parallel slider can be shortened.

Further, by mounting the heating burner on the parallel slider, the injection port of the heating burner can follow the reciprocating linear motion of the parallel slider, so that the moving speed and the moving speed suitable for heating the rail head can be improved. Stroke is obtained.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a rail end heating device according to the present invention will be described with reference to the drawings. FIG. 1 is a simplified configuration explanatory view for explaining a main configuration of a rail end heating device. FIG.
(C) is a plane explanatory view for explaining operation of a rocking mechanism of a rail end heating device. The rail end head heating device includes a swing mechanism 10 and a heating burner 30 that can be moved with respect to the surface of the rail end head by the swing mechanism 10.

The heating burner 30 has an injection port 31 directed downward so as to inject a flame onto the rail surface. The swing mechanism 10 includes a columnar parallel slider 11 on which the heating burner 30 is mounted, and the parallel slider 11.
A guide portion 20 mounted on the bottom surface of the main body 1 to guide the reciprocating linear motion, a motor (rotating means) 3 serving as a driving source of the reciprocating linear motion, and a rectangular rotating plate 5 rotated by driving the motor 3 And an interlocking rod 7 for converting the rotary motion of the rotary plate 5 into the reciprocating linear motion.

The guide portion 20 has wall surfaces 2 on both sides with respect to the flat plate.
It comprises a support plate 21 on which 1a is erected, and two guide rods 22, 22 erected in parallel between the wall surfaces. Each guide rod 22 is attached to the parallel slider 11.
Is provided on the guide rod 22 so that a reciprocating linear movement can be performed between the wall surfaces of the guide portion 20. The injection port 31 of the heating burner 30 mounted on the parallel slider 11 is located outside the guide section 20 and the main body 1. In addition, the parallel slider 11
At the end opposite to the heating burner position on the upper surface of the
3 are erected.

The center of the rotating plate 5 is fixed to the rotating shaft 4 of the motor 3, and the end of the rotating plate 5 makes a circular motion. An end of the rotating plate 5 is pivotally attached to one end of the interlocking rod 7 at a lower position thereof. That is, the shaft portion 7 a provided at the end of the interlocking rod 7 is inserted into the hole 5 a at the end of the rotating plate 5 to form the shaft attachment portion 6. The other end of the interlocking rod 7 is the support piece 1 of the parallel slider 11.
3 through the elongated hole 14 extending in the horizontal direction (the front and back direction in FIG. 1) provided in the center of the support piece 3 so that the position of the interlocking rod 7 can be moved in the horizontal direction with respect to the elongated hole 14 of the support piece 13. It is installed. Therefore, the rotational motion of the rotary plate 5 by the motor 3 is converted into a reciprocating linear motion of the parallel slider 11 via the interlocking rod 7 (see FIG. 2).

On the front end side (heating burner mounting side) and the rear end side (motor installation side) of the reciprocating linear motion of the interlocking rod 7 with respect to the support piece 13, the spring receiving nuts 15, 16 are respectively fixed. Spring receiving nut 15 on the front end side of interlocking rod 7
A first spring 17 is mounted between the support piece 13 and the support piece 13. A second spring 18 is provided between the spring receiving nut 16 on the rear end side of the interlocking rod 7 and the support piece 13.
Is installed. The repulsive force of the first spring 17 is set to be larger than the repulsive force of the second spring 18, and the elastic force of each spring is such that neither the first nor the second spring expands or contracts due to the reciprocating linear motion of the parallel slider 11 described later. Is set to a value.

Specifically, the spring is selected so that the elastic force of the first spring 17 itself is greater than the elastic force of the second spring 18, or the same spring is used for the first and second springs (the spring itself). Are the same), the support piece 13 and the spring receiving nut 15,
This is done by adjusting the interval of 16 according to the mounting position of the nut. The repulsive force of the first spring 17
By setting the repulsion force by the second spring 18 to be larger, the moving speed of the parallel slider 11 can be reduced and the moving stroke of the parallel slider 11 can be shortened at the end of the linear motion on the front end side of the parallel slider 11. . Details of the operation will be described later.

A third spring (buffer means) 19 for performing a buffering action at the end of movement of the parallel slider 11 is mounted on the front end (reciprocal linear movement end) of each guide rod 22. . The third spring 19 is connected to the second spring 19
It has the same elastic force as the spring 18.

Next, the operation of the swing mechanism 10 having the above structure will be described with reference to FIGS. When the rotating shaft 4 of the motor 3 rotates, the rotating plate 5 rotates about the rotating shaft 4. The case where the shaft attachment portion 6 of the rotating plate 5 with the interlocking rod 7 is located on the rear end side (FIG. 2A) and the case where the shaft attachment portion 6 is located on the front end side (FIG. 2C) )) Are separated by the distance L0. That is, the shaft attachment portion 6
Performs a circular motion about the rotation axis 4 with the distance L0 as the diameter.

Therefore, when the interlocking rod 7 and the support piece 13 are directly connected (in this mechanism, they are connected via the first and second springs), the shaft attachment portion 6 of the rotating plate 5 The parallel slider 11 moves by the stroke L0 according to the circular motion (simple swinging motion). In the case of the swing mechanism 10, the swing speed and the movement stroke can be adjusted by adjusting the repulsive force of the first spring 17 and the second spring 18. For example, with respect to the first spring 17 and the second spring 18 attached to the front end side and the rear end side of the support piece 13, respectively, the repulsion force of the first spring 17 is set to be larger than the repulsion force of the second spring 18. Thereby, the moving stroke of the parallel slider 11 at the frontmost end can be absorbed by the second spring 18.
As a result, the stroke L1 of the reciprocating linear motion of the parallel slider 11 is shorter than L0.

That is, when the rotating plate 5 rotates clockwise to approach the state shown in FIG. 2A (moves to the rear end side of the parallel slider 11), the interlocking rod 7 moves through the first spring 17. Then, the circular motion of the rotary plate 5 is converted into a linear motion and transmitted to the support piece 13 and the parallel slider 11. At this time, the movement stroke is not absorbed by the first spring 17 (the first spring 17 and the second spring 18).
Maintains the normal length).

Next, the shaft attachment portion 6 of the rotary plate 5 is
At the farthest rear end position (FIG. 2A),
The side surface 11a of the parallel slider 11 abuts on the support plate 21a of the guide portion 20, and the parallel slider 11 is at the stroke end position on the rear end side. At this time, since the force of the first spring 17 and the second spring 18 acts on the support piece 13 and the repulsive force of the first spring 17 is large, the support piece 13 receives a force in the right direction as a whole. 11
And the parallel slider 11 is the same as the support plate 1
1a, the parallel slider 11 is not moved by the spring force.

After that, when the rotating plate 5 rotates clockwise and separates from the state shown in FIG. 2A to reach the state shown in FIG. 2B, the interlocking rod 7 is rotated via the second spring 18. 5 is converted into a linear motion and transmitted to the support piece 13 and the parallel slider 11. At this time, the second spring 18
Does not occur (the first spring 17 and the second spring 18 maintain their normal lengths).

Next, the shaft attachment portion 6 of the rotating plate 5 is
(Movement to the front end side of the parallel slider 11), the side surface 11b of the parallel slider 11 contacts the third spring 19, and the third spring 19 contracts.
Due to the repulsive force of the first spring 17, the second spring 18
Starts to shrink, the amount of movement of the parallel slider 11 decreases, and the movement stroke is absorbed. Shaft attachment part 6 of rotating plate 5
Is located on the front end side closest to the guide portion 20 (FIG. 2).
(C)), the second spring 18 and the third spring 1
9 is the most contracted state.

Thereafter, when the rotating plate 5 rotates clockwise to move away from the state shown in FIG. 2C, the second spring 18 and the third spring 19 return to the normal state (the length of the normal state). Until the parallel slider 11 moves a small amount, the parallel slider 11 moves to the third spring 1
9, the parallel slider 11 moves the interlock rod 7
Then, it moves following the movement of the rotary plate 5 via the second spring 18.

Accordingly, as shown in FIG. 3, the rail end head heating device having the swing mechanism 10 having the above structure is adjusted so that the swing front end position of the injection port 31 of the heating burner 30 is located substantially at the rail end. When placed on the rail end head, the front end position of the parallel slider 11 takes the time axis downward,
As shown in FIG. 3, the second spring 18 moves the stroke L2 (L0-L1) at the front end side of the movement stroke.
The stroke is absorbed by the minute. Since the heating burner 30 moves in synchronization with the movement of the parallel slider 11, the injection port 31 performs a reciprocating linear movement with respect to the rail surface, but the injection port 31 moves slowly on the rail end side due to the stroke absorption. A folding operation is performed (the dotted line indicates a linear folding operation (simple swinging motion) when there is no stroke absorption).

If the repulsive force of both the first spring 17 and the second spring 18 is set to be weak, the injection port 31 of the heating burner 30 is slowly moved at the reciprocating ends (oscillating ends) on both sides, including an appropriate pause. Rocking can be performed. Conversely, the first spring 17 and the second spring 18
If the repulsive force of both is strongly set, it is possible to cause the injection port 31 of the heating burner 30 to perform a simple swing without a pause according to the movement of the connecting rod 7 at the swing ends on both sides.

Next, a more specific embodiment of the rail end head heating device will be described with reference to FIGS. In the figure, parts having the same configuration as those of the rail end heating device shown in FIGS. 1 to 3 are denoted by the same reference numerals. By assembling the twelve frames 40, a rectangular main body 1 is formed in which a space in which each mechanism can be arranged is formed, and a bottom surface 1a is mounted below the main body. The frame body 40 is formed of a material such as steel, for example, having a strength enough to withstand radiant heat due to the flame of the heating burner 30.

A heat shield plate 41 made of aluminum is mounted on the front end frame 40a. The heat shield plate 41 has a strength capable of protecting the swing mechanism 10 from the rebound of the flame injected from the injection port 31 of the heating burner 30. As shown in FIG. 6, the lower surface of the heat shield plate 41 has a concave portion 42 into which a rail head can be inserted, and cutout portions 43 at both ends. These notches 43
This is because, even when a plurality of rails 400 are placed close to each other as shown in the drawing, the heating device can be arranged on the rails by arranging the heads of the adjacent rails in the cutouts 43. In addition, a concave portion 44 in which the nozzle portion 32 of the heating burner 30 can move is formed on the upper surface of the heat shield plate 41.

On the lower surface of the lower end of the lower frame 40b,
The roller unit 45 is mounted. This roller portion 45
The lower surface is formed of a smooth surface having the same shape as the top of the rail, and straddles the rail head.

A side plate 46 is mounted on the rear frame 40c. A guide portion 47 having a pair of through holes in the vertical direction is fixed to the side plate 46.
The Y-shaped part on the distal end side of the fixing tool 48 is inserted into the bracket 7. The Y-shaped part of the fixing tool 48 is set at an interval that sandwiches the rail head, and
This prevents the quenching device from being displaced on the rail 400 in combination with the concave portion 42 of FIG.

As shown in FIGS. 4 and 8, the motor 3 is fixed to the right end of the main body 1 so that the rotating shaft 4 is positioned downward. The center of a rectangular rotating plate 5 is fixed to the rotating shaft 4 of the motor 3, and the end of the rotating plate 5 moves circularly by the rotation of the rotating shaft 4. One end of a connecting rod 7 is axially mounted on an end of the rotating plate 5 (a shaft 7a provided at an end of the interlocking rod 7 is inserted into a hole 5a at an end of the rotating plate 5 to form a shaft mounting portion). 6).

At the left side of the bottom surface 1a of the main body 1, a guide portion 20 for mounting the parallel slider 11 in a reciprocating linear motion is mounted. The guide portion 20 is provided with a guide rod 22 erected between the wall surfaces 21a, similarly to the swing mechanism 10 shown in the figure, and a rectangular body 11 'for fixing the parallel slider 11 is provided on the guide rod 22. It is designed to move along.

A heating burner 30 is fixed to the left end of the parallel slider 11. The heating burner 30 is made of steel, and is made of a material having sufficient strength to withstand radiant heat due to a flame, similarly to the frame body 40. The heating burner 30 is provided with a nozzle 32 extending outside the frame body. The tip of the nozzle 32 is bent downward to form a jet port 31 at the tip. The head can be rapidly heated.

A gas guide tube 33 and an oxygen guide tube 34 made of stainless steel are connected to the heating burner 30, respectively.
These guide tubes are connected to a hose 36 via an on-off valve 35 made of brass.
It is connected to the. Therefore, by switching the lever 37 of each on-off valve 35, the gas and the high-pressure oxygen from the hose 36 are smoothly supplied to the heating burner 30. Each hose 36 is placed on a guide roller 38 provided on a frame 40c on the rear end side. It has a structure that allows the hose to move smoothly. Also, the injection port 31 of the heating burner 30
Has a structure that heats only the top of the rail head, but it can be replaced with a nozzle that heats both the top and both sides of the head at the same time (nozzles whose nozzles are formed on three sides surrounding the rail head). .

At the right end of the parallel slider 11, a connecting portion 50 for connecting to the interlocking rod 7 is formed. As shown in FIGS. 8 and 9, the connecting portion 50 includes a square-shaped connecting body 51 mounted on the front end side of the interlocking rod 7 so as to penetrate the rod 7, and a front end side with respect to the connecting body 51. And nuts 1 respectively fixed to the interlocking rod 7 on the rear end side
5, 16, a first spring 17 mounted between the front end side nut 15 and the connecting body 51, and a rear end side nut 16
Spring 18 mounted between the connector and the connecting body 51
And a connecting piece 52 that forms a space where the connecting body 51 is mounted on the parallel slider 11.

A columnar projection 53 is formed on the upper and lower surfaces of the connecting body 51, and each projection 53 is
9B is inserted into the hole 54 formed in the hole and the hole 55 formed in the connecting piece 52 so that the connecting body 51 is moved in the space in accordance with the movement of the interlocking rod 7 in the range of the arrow in FIG. Is mounted so as to be rotatable.

With the above structure, the rotating plate 5 is rotated by the driving of the motor 3, and is converted into a reciprocating linear motion of the parallel slider 11 via the interlocking rod 7. The rotation speed of the motor 3 is controlled by a speed adjuster 61 mounted on the side plate 46 so that the period of the reciprocating linear motion of the parallel slider 11 due to the rotation of the rotary plate 5 can be adjusted. Has become. The rotation of the motor 3 is controlled by the side plate 4.
6 and is stopped by a swing end switch 63 (FIG. 7).

Then, the connecting rod 7 and the parallel slider 1
1 is connected to the coupling body 51 via the first spring 17 and the second spring 18, so that the repulsive force of the first spring 17 and the second spring 18 can be adjusted by the nut 15 on the front end side. If the adjustment is performed with the nut 16 on the rear end side, when the parallel slider 11 performs a linear motion (oscillation), the connecting rod 7 is limited only near the front and rear ends of the oscillation.
Is absorbed by the spring, so that the swing of the parallel slider 11 is slower than the forward and backward swing of the connecting rod 7 including an appropriate pause, or a simple swing motion in accordance with the movement of the interlocking rod 7. And can be.

In this example, the nut 15 at the front end is tightened so that the reciprocating force of the first spring 17 is adjusted so that the swing speed of the parallel slider 11 is slow and the moving stroke is absorbed by the second spring 18 at the front end. And the repulsive force of the first spring 17 is set to be greater than the repulsive force of the second spring 18 by loosening the nut 16 on the rear end side to weaken the repulsive force of the second spring 18. .

Further, as shown in FIG. 10, the connecting rod 7 is divided at its central portion, and a rod length adjusting portion 70 composed of a turnbuckle 71 and a fixing nut 72 is attached. By rotating, the divided rods can be separated or brought close to each other, and the entire length of the connecting rod 7 may be adjusted. By adjusting the overall length of the connecting rod 7 by the rod length adjusting section 70, the positions of the nuts 15 and 16 with respect to the connecting section 50 can be adjusted, and the force relationship of the repulsive force of the first spring and the second spring can be adjusted. . That is, the tightening (loosening) and loosening (tightening) of the nuts 15 and 16 can be performed simultaneously only by rotating the turnbuckle 71.

Next, a method of using the rail end head heating device will be described. The rails to be quenched on the rail laying site may be not only new rails but also used reused rails. First, a heating device is placed in the vicinity of the rail end along the longitudinal direction of the rail, the frame 40a on the side where the heating burner is mounted is lifted, and the roller portion 45 in contact with the upper surface of the rail is slid. Of the rear end side fixing device 4
8 is lowered, and the apparatus main body is fixed to the rail end head with the rail side surface sandwiched (FIG. 4).

The heat-insulating steel block 81 covering the rail head is placed on the side of the device from the swinging end on the rear end side to the injection port 31 of the heating burner 30 on the rail end head 401, and the rail head below it Protect parts from fire. Therefore, the temperature of the rail in this portion can be prevented from rising without being heated.

Next, the rocking speed is set by the speed adjuster 61, and after the injection port 31 of the heating burner 30 is ignited, the rocking start switch 62 is pressed to drive the motor 3 for a distance t from the rail end. 100-200 from a certain distance
Oscillation (reciprocating linear motion) within the mm length range (oscillation range)
To start.

During heating of the rail, the entire heating swing range including the rail end head is uniform in order to prevent damage to the corner of the rail head end during laying and to prevent uneven wear in the quenched length range. The surface hardness as well as the heating depth in the quenched length range must be similar. For this purpose, the surface of the rail head from the end of the rail to the end of the swinging range of 100 to 200 mm (oscillation range) is approximately 1000 ° C.
It is necessary to heat uniformly up to the temperature.

When the rails to be quenched are reused rails, some of them are about 20 m from the rail top surface.
In the range from the head to the abdomen under m, there is a top rail having a segregation zone in which the concentration of alloying elements such as manganese is high. Due to the high temperature, an abnormally hardened portion may be generated. Therefore, when heating the end of the local rail, the heating depth is 20 m from the top of the rail.
m.

However, in the swinging motion of the heating burner at the end of the rail, in a simple swinging motion that moves back and forth only by the swing range, heat is radiated from the rail end face 402 into the air and the temperature decreases at the rail end. Occurs. In addition, when the heating burner is stopped and heated during the swing of the rail end surface 402, the heat is concentrated on the corners of the rail head end and overheated melting occurs. On the other hand, if an intermittent rocking motion is performed to stop the rocking of the heating burner in front of the rail end face, overheating and erosion of the rail head end corner can be prevented, but only the stopped point is overheated and the heating depth is reduced. It will be deep. In this way, when the rail end head is heated by the heating burner, the uniform surface temperature and heating are obtained by simple swinging motion that moves only around the swing range or intermittent swinging motion that involves a pause only before and after the swinging end. There was a problem that depth could not be obtained.

According to the heating device having the above structure, the swinging end of the injection port 31 of the heating burner 30 is located at a position separated by a predetermined distance t from the rail end surface, and the nut 15 on the front end is tightened and the nut 16 on the rear end is loosened. Thereby, the repulsive force of the first spring 17 is set stronger than the repulsive force of the second spring 18. Therefore, in the reciprocating linear motion by the parallel slider 11, the vicinity where the injection port 31 is separated from the rail end face 402 by a certain distance t (the front end side movement stroke end).
Since the repulsive force of the second spring 18 is weaker than the repulsive force of the first spring 17, the swing speed of the connecting rod 7 for swinging the parallel slider 11 gradually decreases as described with reference to FIG. It absorbs and slows down, allowing a slow, continuous movement at the turning end of the swing.

As a result, with respect to the heating of the rail end by the heating burner, the entire heating section including the rail end has a uniform heating temperature and uniform heating depth without overheating the rail end corner. Obtainable.

At the end of the movement stroke on the rear end side due to the reciprocating linear motion of the parallel slider 11, the first
Since the repulsive force of the spring 17 is strong, the parallel slider 11
Without absorbing the movement of the connecting rod 7 that swings
A simple swinging motion that does not include a pause according to the movement of the connecting rod 7 is performed.

The following effects can be obtained by using the heating device having the above structure. In other words, by performing quenching processing using a portable compact heating device, quenching processing beside the railroad at the installation site and quenching processing for rails that have been laid, which was not possible conventionally. The work can be performed reliably and in a short time with a small number of people, and the rail life can be extended for these rails. As a result, it is possible to reduce maintenance costs of the railway line.

Also, for used rails which have been used in Shinkansen and conventional lines of the 1st and 2nd grade lines and have been discarded due to uneven wear, quenching of the rail ends at the laying site is carried out. However, the rail head on the side that is not worn can be reused as it is in the third and fourth line sections of the local line as the wheel contact side. As a result, it is possible to greatly contribute to recycling of resources on the railway line.

Further, in the curved section, in order to align the position of the joint portion on the left and right, it has been practiced to cut and lay one end of the rail. Although the quenched part had to be removed, the life of the rail was sometimes reduced.However, the use of the heating device having the above structure enables quenching at the installation site. In this case, a quenching process for extending the life of the rail can be performed after the rail is cut.

[0060]

According to the swing mechanism of the present invention, the interlocking rod is connected to the connecting portion with the parallel slider via the first spring and the second spring, so that the connecting rod is connected to the first spring and the second spring. By adjusting the repulsive force, it is possible to adjust the moving speed in the reciprocating linear motion of the parallel slider and the moving stroke at the reciprocating end,
Various reciprocating linear motions can be obtained. For example, in the linear motion at the reciprocating end, the moving speed can be adjusted without stopping the parallel slider, and the moving stroke on one side (for example, the outward side) can be changed.

In particular, if the elastic force of the first spring is set to be larger than the elastic force of the second spring, the moving speed of the parallel slider at the linear movement end opposite to the interlocking rod with respect to the parallel slider is reduced, and The moving stroke of the parallel slider can be shortened, and a reciprocating linear motion suitable for heat treatment in quenching the rail end can be obtained.

Therefore, if the heating burner is mounted on the parallel slider, the injection port of the heating burner can follow the reciprocating linear motion of the parallel slider, and the uniform heating temperature and uniform heating depth at the rail end head. And a compact heating device that can be installed at the rail laying site.

[Brief description of the drawings]

FIG. 1 is a simplified configuration explanatory view showing an example of an embodiment of a swing mechanism according to the present invention.

FIGS. 2A to 2C are plan explanatory views illustrating a reciprocating linear motion (oscillating motion) of an oscillating mechanism.

FIG. 3 is a movement stroke explanatory diagram for explaining a relationship between a movement of a rotary plate and a movement stroke of a parallel slider (an injection port of a heating burner) in a swing mechanism.

FIG. 4 is a front explanatory view showing an example of an embodiment of a rail end heating device according to the present invention.

FIG. 5 is an explanatory plan view of the heating device.

FIG. 6 is a left side view of the heating device.

FIG. 7 is a right side view of the heating device.

FIG. 8 is an explanatory front view showing a connection structure between a rotating plate and an interlocking rod in the swing mechanism.

FIGS. 9 (a) to 9 (c) show a connecting structure of an interlocking rod and a parallel slider in a swing mechanism, and are a side view, a plan view, and a side view, respectively.

FIG. 10 is an explanatory front view of an adjustment unit interposed in an interlocking rod.

FIG. 11 is a configuration explanatory view of a stationary heating device and an air cooling device conventionally used for a quenching process.

[Explanation of symbols]

1 ... body, 3 ... motor (rotating means), 4 ... rotating shaft,
5: rotating plate, 5a: hole, 6: shaft attachment part, 7:
Interlocking rod, 7a: Shaft, 10: Swing mechanism, 11
... Parallel slider, 13 ... Support piece, 14 ... Elongated hole,
15, 16 ... nut, 17 ... first spring, 1
Reference Signs List 8: second spring, 19: third spring (buffer), 20: guide portion, 21: support plate, 22: guide rod, 30: heating burner, 31: injection port, 40
... frame body, 50 ... connection part, 51 ... connection body, 52 ... connection piece, 70 ... rod length adjustment part, 100 ... heating device,
200: air cooling device, 300: rail conveyance means, 40
0: rail, 401: rail end head, 402: rail end face

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroaki Maeda 2-4-2-4 Shibata, Kita-ku, Osaka-shi, Osaka West Japan Railway Company (72) Inventor Jun Toda 2-chome, Shibata, Kita-ku, Osaka, Osaka No. 24, West West Japan Railway Company (72) Inventor Akihiko Tsuji 2-4-2 Shibata, Kita-ku, Osaka City, Osaka Prefecture Inside West Japan Railway Company (72) Inventor Yukio Sato Ichimitsu, Kokubunji, Tokyo 2-8-8 cho. 38 Within the Railway Technical Research Institute (72) Inventor: Risaburo Suzuki 4-1-1, Higashieki, Koga-shi, Fukuoka Pref.

Claims (6)

[Claims] 1. A parallel slider mounted so as to be capable of reciprocating linear movement along a guide portion, a rotating plate for performing a rotating movement by a rotating means, and an interlocking rod for converting the rotating movement to the reciprocating linear movement. And a connecting portion for connecting the parallel slider and an interlocking rod, wherein a first spring is mounted on a front end side of a reciprocating linear movement of the interlocking rod with respect to the connecting portion of the interlocking rod. A swing mechanism, wherein a second spring is mounted on a rear end side of a reciprocating linear movement with respect to a connecting portion. 2. An interlocking rod having a rod length adjusting portion,
The swing mechanism according to claim 1, wherein the interlocking rod is configured to be movable in the axial direction with respect to the connecting portion. 3. The repulsive force of the first spring is the second repulsive force.
The swing mechanism according to claim 1 or 2, wherein the swing mechanism is larger than a repulsion force of the spring. 4. The swing mechanism according to claim 1, wherein a buffering means is provided at a position of a reciprocating linear motion end on a front end side with respect to the parallel slider. 5. The swing mechanism according to claim 3, wherein a third spring having an elastic force substantially equal to an elastic force of the second spring is mounted at a position of a reciprocating linear movement end on a front end side with respect to the parallel slider. 6. The swinging mechanism according to claim 1, wherein the injection port of the heating burner is located outside the guide portion opposite to the interlocking rod with respect to the guide portion. And a rail end heating device comprising the heating burner mounted on the parallel slider.