JP7057565B2 - Rail catch - Google Patents

Description

The present invention relates to a rail catch used when lifting a rail.

Conventionally, a rail catch (rail catch with a roller) used for lifting a rail in track maintenance work for exchanging rails is known (see, for example, FIGS. 4 and 5 of Patent Document 1).
The rail catch has a structure in which the second arm portion is rotatably supported by the first arm portion, and is configured to sandwich the rail between the first arm portion and the second arm portion.
The first arm and the second arm of the rail catch are each provided with through holes in an arrangement that overlaps when the rail is sandwiched, and by inserting a locking pin into the overlapping and communicating through holes, the first It is locked so that the rotation of the two arms is restricted, and the rail does not come off from the rail catch.

In addition, this rail catch is provided with a roller that is arranged to sandwich the abdomen of the rail with the rail sandwiched between the first arm and the second arm, and vertically feeds the rail that is sandwiched and lifted. be able to.

Japanese Unexamined Patent Publication No. 2013-104217

However, in the case of the rail catch described above, even if the through holes of the first arm portion and the second arm portion are aligned, they are easily displaced, and it may be difficult to insert a locking pin into the through holes to lock the rail catch, for example. There is a problem that it becomes more difficult to insert the locking pin when working at night.
Also, if the locking pin is lost, not only will the rail catch become unusable, but if the lost location is on track, the train may not be able to operate until the locking pin is found. There was a problem.

An object of the present invention is to provide a rail catch capable of more preferably sandwiching a rail.

In order to achieve the above object, the present invention is:
The first arm portion is provided with a first arm portion and a second arm portion rotatably supported by the first arm portion, and the first arm portion is rotated in a direction in which the second arm portion is lowered by its own weight. It is a rail catch that sandwiches the rail between the second arm and the second arm.
The first arm portion is provided with a notch that intersects the rotation direction of the second arm portion.
The second arm portion is provided with an elongated hole that intersects the rotation direction of the second arm portion, and the second arm portion is provided with a lock member that can move along the elongated hole. ,
The lock member moved to the lower end side of the long hole in an arrangement in which the notch of the first arm and the long hole of the second arm overlap each other by rotating the second arm in the downward direction. The rotation of the second arm portion is restricted by entering the notch.

In the case of the rail catch having such a configuration, the second arm is rotated in the direction of pulling up the second arm with respect to the first arm to open the second arm, and then the first arm and the second arm are formed. If the second arm is rotated in the direction of lowering by its own weight while straddling the rail, the notch of the first arm and the long hole of the second arm overlap each other, and the long hole is located on the lower end side of the long hole. Since the moved lock member enters the notch and the rotation of the second arm portion is restricted to a locked state, the rail can be suitably sandwiched between the first arm portion and the second arm portion.
That is, in the case of this rail catch, for example, like the rail catch with a roller of the conventional technique described above, the locking pin is inserted into the through hole of the aligned first arm portion and the second arm portion to rotate. Since it can be locked more easily than it is locked, this rail catch can more preferably hold the rail.

Also, preferably
The lock member is configured to be repelled by a reaction that collides with a striking portion provided in the opening portion of the notch so as to enter the notch.
By doing so, the lock member can be inserted into the depth of the notch, and the rotation of the second arm portion can be restricted and locked more reliably.

Also, preferably
The first arm and the second arm are in contact with the rail with the rail sandwiched between the first arm and the second arm, respectively, and the rail is vertically fed. Make sure that the rotating rollers are arranged.
By doing so, the rail sandwiched by the rail catch can be suitably vertically fed.

Also, preferably
With the rail sandwiched between the first arm portion and the second arm portion, the roller is arranged so that the outer peripheral surface of the roller abuts on the jaw portion of the rail.
If the rail catch abuts the outer peripheral surface of the pair of rollers against the jaw of the rail and sandwiches the rail, even if there are rail bond marks on the side of the head or abdomen of the rail, the rail bond Since the marks do not interfere with the vertical feed of the rail, the rail can be suitably fed vertically.
On the other hand, when the roller is provided so as to sandwich the abdomen of the rail as in the conventional rail catch with a roller described above, the rail bond mark on the side surface of the abdomen of the rail hits the roller, and the rail is vertically fed. It is not preferable because it interferes.

Also, preferably
A groove along the circumferential direction of the roller is provided on the outer peripheral surface of the roller.
With the rail sandwiched between the first arm portion and the second arm portion, the jaw portion of the rail is configured to be guided into the groove portion.
With the rail catch sandwiching the rail between the first arm and the second arm, the jaw of the rail is guided into the groove of the roller, so it fits into the groove between the pair of rollers. The vertical feed of the rail can be smoothly performed.

According to the present invention, a rail catch that can more preferably hold the rail can be obtained.

It is a front view of the rail catch of this embodiment, and shows the state which sandwiched a rail. It is a front view of the rail catch of this embodiment, and shows the state which the 2nd arm part is open. It is a front view of the rail catch of this embodiment, and shows the process of closing a 2nd arm part. It is a front view of the rail catch of this embodiment, and shows the state which the lock member collided with the hitting part in the process of closing the 2nd arm part. It is explanatory drawing about the lock member of the rail catch of this embodiment being repelled by the reaction which collided with the hitting part, and entering the depth of a notch.

Hereinafter, embodiments of the rail catch according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

The rail catch 100 of the present embodiment includes, for example, as shown in FIG. 1, a first arm portion 10 and a second arm portion 20 rotatably supported by the first arm portion 10. ..
The first arm portion 10 and the second arm portion 20 are connected via the connecting shaft 1, and the second arm portion 20 rotates about the connecting shaft 1 as an axis. The second arm portion 20 here has a smaller size than the first arm portion 10.
The rail R is sandwiched between the first arm portion 10 and the second arm portion 20 in a state where the second arm portion 20 is rotated in a downward direction due to its own weight.
Further, the rail catch 100 is provided with, for example, a hooking portion 2 for hooking a chain block. The hooking portion 2 is provided on the upper end side of the first arm portion 10.
Then, the rail catch 100 holding the rail R can be lifted by a chain block so that the rail R can be lifted.

The first arm portion 10 is, for example, a steel member, and a roller 40 is rotatably arranged on the lower end side thereof.
A notch 11 that intersects the rotation direction of the second arm portion 20 is provided at a portion of the first arm portion 10 that overlaps with the second arm portion 20.
Further, the notch 11 is formed so as to have an inclination opposite to the inclination of the shoulder portion 12 of the first arm portion 10 above the notch 11. Specifically, the inclination of the shoulder portion 12 is an inclination that descends to the outside of the first arm portion 10 (in other words, an inclination that descends in a direction away from the connecting shaft 1), whereas the inclination of the notch 11 is the inclination of the first arm. The inclination is downward toward the inside of the portion 10 (in other words, the inclination is downward in the direction approaching the connecting shaft 1).
Further, the notch 11 has a shape in which the lower inner edge is longer than the upper inner edge closer to the shoulder portion 12, and exhibits a front view substantially "" shape (or a front view substantially J shape). ing. A striking portion 11a on which the lock member 30 described later collides is provided in the opening portion of the notch 11 which is a part of the lower inner edge of the notch 11. That is, a part of the lower inner edge of the notch 11 near the opening portion functions as the striking portion 11a.

The second arm portion 20 is, for example, a steel member, and a roller 40 is rotatably arranged on the lower end side thereof.
The second arm portion 20 is provided with an elongated hole 21 that intersects the rotation direction of the second arm portion 20. The elongated hole 21 is provided in a portion overlapping the notch 11 of the first arm portion 10.
Further, the second arm portion 20 is provided with a lock member 30 in which the shaft portion 31 is inserted into the elongated hole 21.
The lock member 30 is, for example, a steel member and is movably arranged along the elongated hole 21.
The lock member 30 is movably attached to the second arm portion 20 along the elongated hole 21, and is used integrally with the second arm portion 20. That is, the lock member 30 is not used by removing it from the second arm portion 20.

The roller 40 is a member that abuts on the rail R with the rail R sandwiched between the first arm portion 10 and the second arm portion 20.
In particular, the roller 40 has the first arm portion 10 in a direction in which the outer peripheral surface of the roller 40 abuts on the jaw portion of the rail R with the rail R sandwiched between the first arm portion 10 and the second arm portion 20. And are arranged on the second arm portion 20, respectively.
Further, a groove 41 along the circumferential direction of the roller 40 is provided on the outer peripheral surface of the roller 40.
The roller 40 is adapted to rotate in response to the vertical feed of the rail R sandwiched by the rail catch 100 (first arm portion 10, second arm portion 20).
Then, in a state where the rail catch 100 sandwiches the rail R between the first arm portion 10 and the second arm portion 20, the jaw portion of the rail R is guided into the groove portion 41 of the roller 40, so that a pair. The rail R fitted in the groove 41 can be smoothly fed vertically between the rollers 40 of the above.

Next, a procedure for sandwiching the rail R with the rail catch 100 of the present embodiment will be described.

First, as shown in FIG. 2, the second arm portion 20 is rotated in the pulling direction to open the second arm portion 20.
At this time, the operator moves the lock member 30 toward the upper side of the elongated hole 21 with his / her finger, pulls out the lock member 30 from the notch 11 of the first arm portion 10, and then pulls up the second arm portion 20. Rotate to.
Since the first arm portion 10 and the second arm portion 20 are formed with small holes 10h and 20h for the operator to put their fingers on, respectively, it is easy to grasp the rail catch 100.
Further, when the second arm portion 20 is rotated in the pulling direction, the lock member 30 abuts on the shoulder portion 12 of the first arm portion 10, and the roller mounting portion of the second arm portion 20 is attached to the first arm portion 10. The second arm portion 20 is prevented from rotating more than necessary by hitting it.

Next, as shown in FIG. 3, the roller 40 of the first arm portion 10 is arranged in the vicinity of the jaw portion of the rail R, and the work is performed with the first arm portion 10 and the second arm portion 20 straddling the rail R. Person releases the second arm 20. The released second arm portion 20 rotates in a downward direction due to its own weight.
Note that FIG. 3 shows the arrangement of the lock member 30 immediately before reaching the notch 11 from the shoulder portion 12 of the first arm portion 10 in the process of rotating the second arm portion 20 in the downward direction.

Then, as shown in FIG. 4, when the second arm portion 20 is further lowered and the lock member 30 reaches the notch 11 of the first arm portion 10, the lock member 30 collides with the striking portion 11a of the notch 11.
The lock member 30 that has collided with the striking portion 11a is repelled by the reaction of the collision and is guided to enter the depth of the notch 11.
Specifically, as shown in FIG. 5, in the process of rotating the second arm portion 20 in the downward direction, the lock member 30 descends from the connecting shaft 1 so as to descend along the shoulder portion 12 of the first arm portion 10. After descending in the direction of separation, it is repelled in the direction of approaching the connecting shaft 1 by the reaction of the collision with the striking portion 11a, and enters the depth of the notch 11.

Then, as shown in FIG. 1, in the arrangement in which the notch 11 of the first arm portion 10 and the elongated hole 21 of the second arm portion 20 overlap each other, the lock member 30 moved to the lower end side of the elongated hole 21 becomes the notch 11. By entering the state, the rotation of the second arm portion 20 is restricted.
That is, at this time, the lock member 30 is in a state in which the notch 11 of the first arm portion 10 and the elongated hole 21 of the second arm portion 20 are communicated with each other, and the lock member 30 is the rotation of the second arm portion 20. Since it is in a state of being inserted into the notch 11 that intersects the moving direction, even if the second arm portion 20 is simply rotated, the lock member 30 hits the inner edge of the notch 11 and its movement is restricted. The second arm portion 20 cannot be rotated.
Then, in a state where the rotation of the second arm portion 20 is restricted, the pair of rollers 40 of the rail catch 100 are in contact with the jaw portion of the rail R, and the rail catch 100 is in a state of sandwiching the rail R. ing.
In this way, since the rail catch 100 is locked in a state of sandwiching the rail R, if the rail catch 100 is lifted by a chain block or the like, the rail R held by the rail catch 100 can be lifted.

When releasing the rail R held by the rail catch 100, as shown in FIG. 2, the operator moves the lock member 30 to the upper side of the elongated hole 21 with his / her finger, and moves the lock member 30 to the upper side. The second arm portion 20 may be opened by rotating the second arm portion 20 in the pulling direction after the state of being pulled out from the notch 11 of the arm portion 10.

As described above, in the case of the rail catch 100 of the present embodiment, from the state where the second arm portion 20 is pulled up with respect to the first arm portion 10, the second arm portion 20 is rotated in the downward direction by its own weight. Then, the lock member 30 can be fitted into the notch 11 to lock the rotation of the second arm portion 20, so that the first arm portion is aligned with the first arm portion, for example, as in the above-mentioned conventional rail catch with a roller. It can be locked more easily than inserting a locking pin into the through hole of the second arm to lock the rotation.
Then, by locking the rotation of the second arm portion 20 with respect to the first arm portion 10, the rail R can be sandwiched between the roller 40 of the first arm portion 10 and the roller 40 of the second arm portion 20. With the rail catch 100 of the present embodiment, the rail R can be more easily sandwiched than the rail catch with a roller of the conventional technique described above.

Further, the lock member 30 of the rail catch 100 of the present embodiment is attached to the second arm portion 20 and is not removed from the second arm portion 20 for use, so that the lock member 30 is not lost.
That is, unlike the above-mentioned conventional rail catch with a roller, the trouble of losing the locking pin does not occur.

Further, since the rail catch 100 has a pair of rollers 40 in contact with the jaw portion of the rail R for sandwiching the rail R, the lifted rail R can be suitably vertically fed.
Specifically, as shown in FIG. 1, in this rail catch 100, the outer peripheral surfaces (groove portions 41) of the pair of rollers 40 are brought into contact with the jaw portions of the rail R to sandwich the rail R. Even if there are rail bond marks on the side surface of the head or the side surface of the abdomen of the rail R, the rail bond marks do not interfere with the vertical feed of the rail R, so that the rail R can be suitably fed vertically.
On the other hand, when the roller is provided so as to sandwich the abdomen of the rail as in the rail catch with a roller of the prior art described above (for example, FIGS. 4 and 5 of Patent Document 1), the side surface of the abdomen of the rail is provided. Since the rail bond mark hits the roller and hinders the vertical feed of the rail R, the rail R that has been pinched is once lowered and released, and the rail R is re-pinched and lifted at a place where there is no rail bond mark, and the rail R is vertically fed. The track maintenance work was sometimes complicated, such as having to repeat the work.
That is, with the rail catch 100 of the present embodiment, even a rail R having a rail bond mark can be more preferably sandwiched, and the rail R can be suitably vertically fed.

As described above, in the rail catch 100 of the present embodiment, the lock member 30 movably arranged along the elongated hole 21 of the second arm portion 20 is fitted into the notch 11 of the first arm portion 10, and the second arm portion 10 is second. The rail R can be more preferably sandwiched by locking the rotation of the arm portion 20.
Further, the rail catch 100 can suitably vertically feed the rail R even if the sandwiched rail R has a rail bond mark.

In the above embodiment, the rail catch 100 (so-called roller catch) in which the rollers 40 are arranged on the lower end sides of the first arm portion 10 and the second arm portion 20 has been described as an example. Is not limited to this, and the roller 40 is not arranged on the first arm portion 10 and the second arm portion 20, and the rail R is provided at the lower ends of the first arm portion 10 and the second arm portion 20. It may be a rail catch 100 having a structure to be sandwiched. (For example, a rail catch having a structure in which the roller 40 portion of the rail catch 100 of the present embodiment is non-rotatable, that is, a holding portion in which the rollers 40 arranged on the first arm portion 10 and the second arm portion 20 are non-rotatable. It may be a rail catch with a configuration replaced with.)
Further, the direction in which the outer peripheral surface of the roller 40 abuts on the jaw portion of the rail R is not limited to any direction, and the direction in which the roller 40 abuts on the rail R may be any other portion. ..

In addition, it goes without saying that the specific detailed structure and the like can be changed as appropriate.

1 Connecting shaft 2 Hooking part 10 1st arm part 10h Small hole 11 Notch 11a Hitting part 12 Shoulder part 20 2nd arm part 20h Small hole 21 Long hole 30 Lock member 31 Shaft part 40 Roller 41 Groove part 100 Rail catch R rail

Claims (5)

The first arm portion is provided with a first arm portion and a second arm portion rotatably supported by the first arm portion, and the first arm portion is rotated in a direction in which the second arm portion is lowered by its own weight. It is a rail catch that sandwiches the rail between the second arm and the second arm.
The first arm portion is provided with a notch that intersects the rotation direction of the second arm portion.
The second arm portion is provided with an elongated hole that intersects the rotation direction of the second arm portion, and the second arm portion is provided with a lock member that can move along the elongated hole. ,
The lock member moved to the lower end side of the long hole in an arrangement in which the notch of the first arm and the long hole of the second arm overlap each other by rotating the second arm in the downward direction. A rail catch characterized in that the rotation of the second arm portion is restricted by entering the notch. The rail catch according to claim 1, wherein the lock member is configured to enter the notch by being repelled by a reaction that collides with a striking portion provided in the opening portion of the notch. .. The first arm and the second arm are in contact with the rail with the rail sandwiched between the first arm and the second arm, respectively, and the rail is vertically fed. The rail catch according to claim 1 or 2, wherein a roller that rotates with the arm is arranged. It is characterized in that the roller is arranged in a direction in which the outer peripheral surface of the roller abuts on the jaw portion of the rail in a state where the rail is sandwiched between the first arm portion and the second arm portion. The rail catch according to claim 3. A groove along the circumferential direction of the roller is provided on the outer peripheral surface of the roller.
The fourth aspect of claim 4, wherein the jaw portion of the rail is configured to be guided into the groove portion in a state where the rail is sandwiched between the first arm portion and the second arm portion. Rail catch.

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