JP3194871U - Rail support - Google Patents

Abstract

A rail support for accurately measuring the amount of rail movement using a digital caliper during a thermite welding reaction is provided. A rail support 10 for mounting a digital caliper 40 that measures the amount of movement between rails 1 when the rails 1 are welded to each other. And a pair of rail support members 11 having fixing means 12 that are fixed to each head 2 and are connected to each rail support member 11 by extending in a direction perpendicular to the longitudinal direction of the rail 1. Each arm part 20 includes caliper fixing parts 30 and 30 provided in each arm part 20 for fixing the fixed side measuring part 42 and the movable side measuring part 43 of the digital caliper 40, respectively. [Selection] Figure 1

Description

  The present invention relates to a rail support for mounting a digital caliper that measures the amount of movement between rails when the rails are connected by thermite welding.

The rail thermite welding method performed on the railway track is performed by the following procedure.
First, as shown in FIG. 8, the end surfaces of the rails are brought into contact with each other with a certain gap 100 therebetween, and then the periphery of the gap is covered with a refractory material 101 made of silica sand. The refractory material 101 is formed with a convex welding surplus portion having a height of 6 mm and a width of 40 mm in order to reliably melt the end surface of the rail 1 and the periphery of the end surface.
Next, after the inside of the refractory material 101 is heated to about 1000 ° C. with an oxygen / propane burner, a thermite reaction crucible 102 is disposed in the gap 100 so that the chemical composition in the crucible 102 is the same as that of the rail 1. The formulated thermite agent 103 is added to cause the thermite reaction.

Then, the molten metal having a high temperature of 2200 ° C. or higher generated by the thermite reaction in the gap 100 is poured from the automatic hot water tap 104 and the gaps 100 are filled with the molten metal, thereby welding the rails 1 to each other.
After that, only the weld surplus on the top surface and both sides of the head of the rail 1 that the train wheel contacts is removed with a dedicated hot shear when the weld is hot, and only the surface irregularities are polished by grinder polishing. After that, the weld is allowed to cool to a temperature of 100 ° C. or lower.
When the temperature of the welded part becomes 100 ° C or lower, the top surface of the rail 1 and the both sides of the head are finished and polished so that the train can pass without any trouble (patented) Reference 1).

  At the time of thermite welding, it is necessary to make the rails stationary, and if the rails move for some reason, cracks occur in the welded part, cracks are likely to occur, etc. There was a problem that the welding quality deteriorated.

JP 2007-175707 A

In recent years, in order to realize welding with good quality in the elapsed time at the time of thermite welding (the time after pouring the high-temperature molten metal generated by the thermite reaction into the gap between the rails), a certain period (for example, In the case of a 50N rail, it is important not to move the rail from 90 seconds to 160 seconds), and it has been elucidated that the amount of movement is 0.4 mm or less.
Conventionally, when measuring the amount of movement of the rail, before starting thermite welding, mark each rail to be welded at both ends of the snail, and after the end of thermite welding, the misalignment is re-applied. The amount was measured as the amount of movement between the rails relative to the start of welding. According to the measurement method, only a movement of 1 mm or more could be grasped.
That is, since the allowable movement amount at the time of thermite welding is 0.4 mm or less, there is a problem that the above-described measurement method cannot accurately determine whether the movement amount is 0.4 mm or less.

  The present invention has been proposed in view of the above circumstances, and an object thereof is to provide a rail support for accurately measuring the amount of rail movement using a digital caliper during a thermite welding reaction.

In order to achieve the above object, the present invention (Claim 1) provides a rail support for mounting a digital caliper (40) for measuring the amount of movement between rails (1) and (1) when welding the rails (1) and (1). 10), which includes the following configuration.
Fixing means for fitting to each head (rail head 2) (rail head 2) or each bottom of the rails (1) and (1) and fixing to each head or bottom. A pair of rail support members (11) (11) having (locking screws 12).
Each arm part (20) (20) extended and connected in the direction orthogonal to the longitudinal direction of a rail from each said rail support member (11) (11).
Vernier caliper fixing portions (30) and (30) provided on the arm portions (20) and (20) for fixing the fixed side measuring portion (42) and the movable side measuring portion (43) of the digital caliper (40), respectively. .

Claim 2 is the rail support of claim 1,
The caliper fixing part (30) (30)
A rectangular through hole (31) into which a prism portion (48) provided in the fixed side measuring portion (42) or the movable side measuring portion (43) of the digital caliper (40) is inserted;
A first screw hole (32) for fixing the prism portion (48) toward the rail welding side in the horizontal plane direction;
A first screw member (33) penetrating the first screw hole (32) and having a tip abutting against the prism portion (48) in the rectangular through hole (31);
It is characterized by having.

Claim 3 is the rail support of claim 1,
In each caliper fixing portion (30), a second screw hole (34) is provided in a direction orthogonal to the first screw hole (32), passes through the second screw hole (34), and passes through the rectangular shape. In the hole (31), a second screw member (35) whose tip abuts against the prism portion (48) is provided.

Claim 4 is the rail support of claim 1,
The arm part (20) is formed of an L-shaped piece, and the caliper fixing part (30) is provided on the vertical surface (21) of the L-shaped piece.

Claim 5 is the rail support of claim 1,
The said arm part (20) is connected from the height position of the rail belly part (3) of the said rail support member (11), It is characterized by the above-mentioned.

The rail support (10) according to claim 6 is a type using a small digital caliper (50) different from the digital caliper (40), and the rails (1) and (1) are moved between the rails during welding. In order to wear the digital caliper (50) for measuring the quantity, it is characterized by including the following configuration.
Fixing means for fitting to each head (rail head 2) (rail head 2) or each bottom of the rails (1) and (1) and fixing to each head or bottom. A pair of rail support members (11) (11) having (locking screws 12).
A first arm portion (20A) and a second arm portion (20B) connected to each rail support member (11) (11) by extending in a direction orthogonal to the longitudinal direction of the rail.
A rod part (25) having one end attached to the second arm part (20B) and disposed through the first arm part (20A).
A caliper fixing part (30A) fixed to the first arm part (20A) in order to fix one measuring part (fixed side measuring piece 51A) of the digital caliper (50).
A caliper fixing part (30B) fixed to the rod part (25) in order to fix the other measuring part (movable side measuring piece 51B) of the digital caliper (50).

Claim 7 is the rail support of claim 6,
The rod part (25) is attached to the second arm part (20B) by attaching a cylindrical part (25A) provided in the cylindrical part (27) received on the second arm part side so as to be orthogonal to the axial direction at the tip of the rod part. ).

  According to the present invention, a pair of rail support members (11) is fixed on each head (rail head 2) (rail head 2) of the rails (1) and (1) by the fixing means (locking screw 12). The fixed side measuring part (42) and the movable side of the digital caliper (40) are fixed to the caliper fixing parts (30) and (30) provided on the arm parts (20) and (20) of each rail support member (11). Since the digital caliper (40) is mounted between the rails by fixing the measurement unit (43), the distance between the fixed-side measurement unit (42) and the movable-side measurement unit (43) after thermite welding. Therefore, the amount of movement between the rails can be accurately measured.

  Further, in each caliper fixing portion (30), each first screw that comes into contact with each column portion (48) of the fixed side measuring portion (42) and the movable side measuring portion (43) from both sides toward the rail welding side. By fixing with the material (33), reliable fixing can be achieved.

  Furthermore, in the horizontal surface of each caliper fixing portion (30), the first screw member (33) and the second screw member (35) that are orthogonal to each other are fixed to the prism portion (48), thereby realizing more reliable fixing. can do.

  Also, a caliper fixing portion (30A) fixed to one rail support member (11) and the first arm portion (20A), and a rod portion (to the other rail support member (11) and second arm portion (20B)). It is possible to use a small digital caliper (50) by measuring the amount of movement with the caliper fixing part (30B) fixed via 25).

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory perspective view of a state in which a rail support according to an example of an embodiment of the present invention is installed between rails and a digital caliper is mounted. It is an expansion perspective view explanatory drawing of a caliper fixing | fixed part. It is a graph which shows the measurement result at the time of measuring a rail movement amount using a digital caliper. It is perspective explanatory drawing of the state which installed the rail caliper concerning the other example of embodiment of this invention between rails, and mounted | wore with a digital caliper. It is an assembly reference explanatory drawing for demonstrating the fixed state of the rod part with respect to a square support piece. It is a partial side surface explanatory view for explaining a fixed state of a rod part to a square support piece. It is sectional explanatory drawing which shows the mounting state to the rail of the rail support tool which concerns on the other example of embodiment of this invention. It is explanatory drawing in the case of performing thermite welding between rails.

An example of an embodiment of a rail support of the present invention will be described with reference to FIGS. 1 and 2. In this example, the case where thermite welding is performed between 50N rails will be described.
The rail support 10 of the present invention is employed as a tool for installing a digital caliper 40 for measuring the amount of movement between rails when thermite welding A is performed between the rails 1 and 1 between the rails. Is.

  As shown in FIG. 1, the digital caliper 40 is slidable through the long piece 41, the fixed-side measuring unit 42 fixed to one end of the long piece 41, and the long piece 41. The movable side measurement unit 43 is mounted, and the columnar part 48 is fixed to the lower surface of the fixed side measurement unit 42, the square column part 48 is fixed to the lower surface of the movable side measurement unit 43, and the columnar part A display unit 44 for displaying a value obtained by measuring a relative distance between 48 is provided.

The rail support 10 includes a pair of rail support members 11, 11, arm portions 20, 20 connected to the rail support members 11, 11, and a caliper fixing portion 30 provided on the arm portion 20. Is done.
The rail support member 11 is formed in a U-shaped piece that fits into the rail head 2 from above. Each rail support member 11 is fitted and fixed on each of the left and right rail heads 2 for performing thermite welding by providing a fixing means including a locking screw 12 penetrating the wall surface along the side surface of the rail head 2. It comes to be placed.

An arm portion 20 is connected to each rail support member 11 in a direction orthogonal to the longitudinal direction of the rail 1. Each arm portion 20 is formed of an L-shaped piece having a vertical surface 21 on the side away from the thermite weld A.
In this example, the rail support member 11 and the arm portion 20 are connected so that the upper surfaces thereof are positioned on the same plane. However, the arm portion 20 may be connected to the height position of the rail abdomen 3 of the rail support member 11. . In this case, it is possible to prevent the digital caliper 40 from being positioned higher than the rail head 2 and facilitate the work around the rail.
Moreover, the rail support member 11, the arm part 20, and the caliper fixing | fixed part 30 are each comprised with steel, and are connected by welding.

  Each caliper fixing portion 30 is provided on the vertical surface 21 of the L-shaped piece in each arm portion 20. The caliper fixing part 30 is for fixing the columnar part 48 of the fixed side measuring part 42 of the digital caliper 40 and the columnar part 48 of the movable side measuring part 43. As shown in FIG. The rectangular through hole 31 into which the prism portion 48 provided in the fixed side measuring portion 42 (or the movable side measuring portion 43) is inserted is configured. The vernier caliper fixing portion 30 has a first screw hole 32 drilled toward the rail welding side in the horizontal plane direction, and a tip abutting on the rectangular column portion 48 through the first screw hole 32 and in the rectangular through hole 31. By providing the first screw member 33, the prism portion 48 is fixed.

  Further, the caliper fixing portion 30 is provided with a second screw hole 34 in a direction orthogonal to the first screw hole 32, penetrating through the second screw hole 34, and the tip thereof is formed into a rectangular column portion 48 in the rectangular through hole 31. A second screw member 35 that abuts is provided. By fixing the first screw member 33 and the second screw member 35 to the prism portion 48 from a direction shifted from each other by 90 degrees, the fixed state of the prism portion 48 in the caliper fixing portion 30 can be further strengthened. .

  According to the rail support tool 10 described above, when measuring the amount of movement between the rails after thermite welding, the prism portion 48 fixed to the fixed-side measuring portion 42 of the arm portion 20 of the rail 1 on one side is used. On the other hand, the movable-side measuring unit 43 moves relative to the long piece 41 by moving the prism 48 fixed to the movable-side measuring unit 43 of the arm unit 20 of the other rail 1. The amount can be measured with a digital caliper 40.

Next, a procedure for measuring the amount of movement of the left and right rails using the rail support 11 described above during thermite welding will be described.
First, the end surfaces of the rails to be subjected to thermite welding are butted with a certain gap, and a crucible for thermite reaction is placed on the gap.
Rail support members 11, 11 are arranged on the rail head 2, and are fixed with locking screws 12 to fix the rail support 10 to the left and right rails 1, 1.
The columnar part 48 of the fixed side measuring part 42 of the digital caliper 40 and the columnar part 48 of the movable side measuring part 43 are respectively inserted into each caliper fixing part 30 of the rail support part 10, and the first screw member 33 and The second screw member 35 is used for fixing.
In this state, the movement amount (distance between the rails) of the digital caliper 40 is set to zero.

Next, a thermite agent blended so as to have the same chemical composition as the rail is put in the crucible to cause the thermite reaction, and the molten metal generated by the thermite reaction is poured into the gap between the rails to melt the molten metal. Thermite welding A between rails is performed by filling.
Using the digital caliper 40, the amount of movement in the elapsed time after thermite welding is measured at regular intervals (for example, 30 seconds).

When the measurement results displayed every 30 seconds on the display unit 44 of the digital caliper 40 are tabulated, for example, the graph is as shown in FIG. A broken line P is an example in which the amount of rail movement is normal, and a broken line Q is an example in which an abnormality has occurred in the amount of rail movement.
In order to realize welding with good rail quality during thermite welding, in the case of 50N rail, the period from 90 seconds to 160 seconds is the rail movement prohibition period, especially from 100 seconds to 110 seconds. It is important that this period is a rail movement prohibition period, and the amount of movement must be 0.4 mm or less.

The broken line P in the graph of FIG. 3 indicates that the amount of movement (relative distance change between the rails) measured with digital calipers from 1 minute 30 seconds to 2 minutes 30 after the thermite welding is substantially constant, and is within an allowable range. Since it is 0.4 mm or less, it can be determined that there is no deterioration in welding quality.
The broken line Q has a movement amount (relative distance change between rails) measured by digital calipers from 1 minute 30 seconds to 2 minutes 30 after the thermite welding is about 1 mm, and an allowable range of 0.4 mm. Since the value far exceeds, it can be determined that the welding quality has deteriorated.

FIG. 4 shows another example of the embodiment of the rail support 10.
In this example, a small digital caliper 50 different from the digital caliper 40 used for the rail support 10 described above is used. About the same member as FIG. 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.
The digital caliper 50 includes a long piece 41, a fixed-side measurement piece 51 </ b> A formed on one end side of the long piece 41, and a movable-side measurement unit 43 that is slidably attached to the long piece 41. The movable side measurement piece 51B is provided in the display unit 44, and a display unit 44 is provided on which a value obtained by measuring the relative distance between the fixed side measurement piece 51A and the movable side measurement piece 51B is displayed.

Hereinafter, a description will be given focusing on a configuration different from the rail support 10 of FIG.
A square support piece 22 is connected to the vertical surface 21 of the first arm portion 20A, and a fixed caliper support portion 23 through which a rod portion 25 described later passes is fixed to the square support piece 22. On the other hand, a square support piece 24 is connected to the second arm portion 20B so as to face the side surface of the rail 1.
A rod portion 25 is mounted between the first arm portion 20A and the second arm portion 20B. That is, one end of the rod portion 25 is fixed to the square support piece 24 of the second arm portion 20B, and the other end side of the rod portion 25 is disposed through the square support piece 22 and the fixed caliper support portion 23. ing. Therefore, the rod portion 25 is configured to be movable with respect to the first arm portion 20 </ b> A, the rectangular support portion 22, and the stationary caliper support portion 23.

A caliper fixing portion 30A is fixed to a side surface position of the fixed caliper support portion 23 fixed to the first arm portion 20A, and a fixed side measuring piece 51A of the digital caliper 50 is fixed to the caliper fixing portion 30A. .
Further, a caliper support portion 26 is fixed to the rod portion 25, a caliper fixing portion 30B is fixed to a side surface position of the caliper support portion 26, and a movable side measuring piece 51B of the digital caliper 50 is fixed to the caliper fixing portion 30B. Yes.

  As shown in FIGS. 5 and 6, the rod portion 25 is fixed to the second arm portion 20 </ b> B in the cylindrical portion 27 fixed to the rectangular support piece 24 of the second arm portion 20 </ b> B in the axial direction at the tip of the rod portion 25. The rod portion 25 is pivotally attached to the cylindrical portion 27 so that the rod portion 25 can be rotated by fitting the cylindrical portions 25 </ b> A provided orthogonally. This is because when the rail support members 11, 11 of the rail support 10 are mounted between the rails, the tip portion rotates when the other end of the rod portion 25 is passed through the fixed caliper support portion 23. This is because the angle of the rod portion 25 with respect to the horizontal direction can be slightly changed, thereby making it easier to penetrate the rod portion 25 into the fixed caliper support portion 23.

In the rail support 10 described above, the rail support member 11 formed in a U-shaped piece that fits from above to each rail head 2 is used, but the structure is fixed to the rail bottom. May be.
For example, as shown in FIG. 7, the bottom portion of the rail 1 is fixed by a rail support member 11 including a rail fixing plate 111, a rail fixing seat 112 and a vertical support column 113. The rail fixing plate 111 is mounted on the rail fixing plate 111 with the hook portion 111a of the rail fixing plate 111 and the hook portion 112a of the rail fixing seat 112 fixed to the rail fixing plate 111 with fixing means 12 (bolts 114 and nuts 115). The bottom of the rail 1 is fixed. A vertical support column 113 is connected to the end of the rail fixing plate 111, and the above-described arm unit 20 is fixed to the outside of the vertical support column 113. Since the structure of the arm part 20 and the calipers attached to the arm part 20 are the same as those in the example shown in FIG. 1 or FIG.
According to this example, the bottoms of the rails 1 can be fixed by the rail support member 11 (rail fixing plate 111 and rail fixing seat 112) and fixing means 12 (bolt 114 and nut 115).
In the above-described example, the arm unit 20 is fixed to the outside of the vertical support column 113 (the arm unit 20 is indicated by a dotted line), but the arm unit is disposed on the inner side (opposite the dotted line) of the vertical support column 113. 20 may be fixed.

  According to the rail support 10 described above, when measuring the amount of movement between the rails after thermite welding, the caliper fixing portion 30A of the fixed caliper support portion 23 of the first arm portion 20A of the rail 1 on one side is measured. The movable side measurement piece 51B fixed via the rod part 25 and the movable side caliper support part 26 moves relative to the second arm part 20B of the other rail 1 with respect to the fixed side measurement piece 51A fixed. Thus, the movable-side measuring unit 43 moves with respect to the long piece 41, and the amount of movement can be measured with a small digital caliper 50.

  DESCRIPTION OF SYMBOLS 1 ... Rail, 2 ... Rail head part, 3 ... Rail abdominal part, 10 ... Rail support tool, 11 ... Rail support member, 12 ... Locking screw (fixing means), 20 ... Arm part, 20A ... 1st arm part, 20B 2nd arm part, 21 ... Vertical plane, 22 ... Rectangular support piece, 23 ... Fixed caliper support part, 24 ... Square support piece, 25 ... Rod part, 26 ... Movable caliper support part, 27 ... Cylindrical part, 30 ... caliper fixing part, 31 ... rectangular through hole, 32 ... first screw hole, 33 ... first screw material, 34 ... second screw hole, 35 ... second screw material, 40 ... digital caliper, 41 ... long piece 42 ... fixed side measurement unit, 43 ... movable side measurement unit, 44 ... display unit, 48 ... square column part, 50 ... digital caliper, 51A ... fixed side measurement piece, 51B ... movable side measurement piece.

Claims (7)

A rail support for mounting a digital caliper that measures the amount of movement between rails when welding the rails,
A pair of rail support members fitted with each head or each bottom between the rails and having fixing means for fixing to each head or each bottom; and
Each arm portion extended and connected in a direction orthogonal to the longitudinal direction of the rail from each rail support member;
A vernier caliper fixing portion provided on each of the arm portions to fix the fixed side measuring portion and the movable side measuring portion of the digital caliper, and
A rail support, comprising: The caliper fixing part is
A rectangular through hole into which a prism portion provided in the fixed side measuring unit or the movable side measuring unit of the digital caliper is inserted,
A first screw hole for fixing the prism portion toward the rail welding side in the horizontal plane direction;
A first screw member penetrating through the first screw hole and having a tip abutting against the prism portion in the rectangular through hole;
The rail support of Claim 1 provided with.   In each of the caliper fixing portions, a second screw hole is provided in a direction orthogonal to the first screw hole, the first screw hole passes through the second screw hole, and the tip of the second screw hole is in contact with the rectangular column portion. The rail support of Claim 1 provided with the 2 screw material.   The rail support according to claim 1, wherein the arm portion is formed of an L-shaped piece, and the caliper fixing portion is provided on a vertical surface of the L-shaped piece.   The rail support according to claim 1, wherein the arm portion is connected from a height position of a rail abdomen of the rail support member. A rail support for mounting a digital caliper that measures the amount of movement between rails when welding the rails,
A pair of rail support members fitted with each head or each bottom between the rails and having fixing means for fixing to each head or each bottom; and
A first arm portion and a second arm portion that are extended and connected in a direction perpendicular to the longitudinal direction of the rail from each rail support member;
One end of the second arm portion is fixed, and the rod portion is disposed through the first arm portion;
A caliper fixing part fixed to the first arm part to fix one of the measuring parts of the digital caliper;
A caliper fixing part fixed to the rod part in order to fix the other measuring part of the digital caliper;
A rail support, comprising:   The rod part is fixed to the second arm part by fitting a cylindrical part received on the second arm part side with a cylindrical part provided perpendicular to the axial direction at the tip of the rod part. Rail support.