JPH05140904A - Railway rail clamp automatic attachment / detachment device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a rail rail clamp automatic attaching / detaching device capable of saving labor and time for removing and mounting a rail clamp. [Structure] One of a pair of rails 3 and 3 fixed to a sleeper 2 by a rail clamp 1 is equipped with wheels mounted on the other rail 3 with a work trolley 5 at the tip so that an outrigger can travel without falling. Place it. A bolt tensioner 12 having a socket wrench portion 11 capable of tightening and loosening the bolt 10 of the rail clamp 1 is provided on the work carriage 5 so as to be able to move up and down. A position sensor 17 for detecting the position of the bolt 10 of the rail clamp 1 is provided on the work carriage 5. Position sensor 1
The control device 1 that can stop the traveling of the work carriage 5 and start the attachment / detachment work of the rail clamp 1 so that the bolt tensioner 12 is positioned immediately above the bolt 10 based on the detection value of 7.
8 is provided on the work carriage 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a railway rail clamp automatic attaching / detaching device.

[0002]

2. Description of the Related Art Generally, when replacing a rail on a railroad track, it is necessary to remove a rail clamp (fastening metal fitting) that secures the rail to the sleepers. Conventionally, such a work requires a worker to use a socket wrench. The bolts of the rail clamp are loosened one by one, and another worker removes the rail clamp with the bolts loosened from the sleepers.

[0003]

However, if the worker manually removes the rail clamp as described above,
It took a lot of effort and time and was very inefficient.

The present invention has been made in view of the above situation, and an object thereof is to provide a rail rail clamp automatic attaching / detaching device capable of saving labor and time for removing and mounting a rail clamp.

[0005]

According to the present invention, there is provided a work carriage movably mounted on one of a pair of rails fixed to a sleeper by a rail clamp, and a work carriage provided on the work carriage so as not to tip over. A fall prevention tool for holding, a bolt tightener having a socket wrench portion capable of moving up and down on the work carriage and tightening and loosening bolts of the rail clamp, and bolts of the rail clamp provided on the work carriage. A position sensor that detects a position, and a control that can stop the traveling of the work carriage and start the attachment / detachment work of the rail clamp so that the bolt tensioner is positioned immediately above the bolt based on the detection value of the position sensor Railway rail clamp automatic attachment / detachment device, characterized in that
And left and right work carriages movably mounted on each of a pair of rails fixed to the sleepers by rail clamps, and the left and right work carriages are pivotally attached to the left and right work carriages via a vertically extending turning shaft. A bolt horizontal tensioner that is horizontally swingably mounted around a turning axis, and a bolt wrench having a socket wrench portion that can be lifted and lowered on the left and right work carriages and that can tighten and loosen the bolts of the rail clamp. And a gripping / conveying device which can be lifted up and down on the left and right work trolleys and can be moved in a direction perpendicular to the traveling direction of the work trolleys. A position sensor provided on each of the left and right work carriages for detecting the bolt position of the rail clamp, and the bolt tensioner is configured to detect the bolt position based on the detected value of the position sensor. Those relating to the railway rail clamping automatic attachment apparatus characterized by comprising a control device and capable of initiating operation of attaching and detaching the rail clamp to stop the traveling of the left and right work carriage to be positioned in the upper position.

[0006]

According to the first aspect of the present invention, when the work carriage is placed on one of the rails to be replaced by the fall prevention tool so as not to fall, and the work carriage is run at a constant speed, the position sensor detects the next movement. The position of the head of the bolt of the rail clamp to be removed is detected, and when the bolt tensioner is located directly above the bolt of the rail clamp, the traveling of the work carriage is stopped by the controller.

Then, the bolt tensioner is lowered by the control device, the socket wrench portion of the bolt tensioner is fitted to the bolt head portion of the rail clamp, and the socket wrench portion is rotated to remove the bolt of the rail clamp. loosen.

At this time, the bolt tensioner is raised while the socket wrench portion is fitted to the bolt head corresponding to the loosened and raised bolt.

When the bolt of the rail clamp is loosened by the bolt tensioner, the rotation of the socket wrench is stopped,
Further raise the bolt tensioner by the required amount to separate the socket wrench from the bolt head.

On the other hand, when the rail clamp is reattached after the rail is replaced, the worker temporarily fixes the rail clamp to the sleeper with bolts, and the bolts of the temporarily fixed rail clamp are tightened with a bolt unraveling machine. Tighten in order.

According to the second aspect of the present invention, when the left and right work carriages are placed on a pair of rails for exchanging work and both work carriages are run at a constant speed, a rail clamp to be removed next by a position sensor. The head position of each of the bolts is detected, and when the bolt tensioner is located directly above the bolts of the rail clamp, the traveling of both work carriages is stopped by the control device.

Then, the control device lowers the gripping and conveying device to grip the rail clamp, and also lowers the bolt tensioner to fit the socket wrench portion of the bolt tensioner into the bolt head of the rail clamp. , Rotate the socket wrench to loosen the bolt of the rail clamp.

At this time, the gripping / conveying device is lifted while the rail clamp is gripped and the bolt tensioner is lifted while the socket wrench is fitted to the bolt head, corresponding to the loosened and raised bolt. ..

When the bolt of the rail clamp is loosened by the bolt tensioner and the gripping and conveying device and the rail clamp is removed from the sleeper, the rotation of the socket wrench is stopped and the bolt tensioner is further raised by a required amount. Then, the socket wrench portion is detached from the bolt head portion, and then the gripping and conveying device is reciprocally moved in a direction perpendicular to the traveling direction, and the rail clamp is dropped at a left and right position with a required distance from the rail.

On the other hand, when the rail clamp is reattached after the rail is replaced, the worker temporarily fixes the rail clamp to the sleepers with bolts, and the bolts of the temporarily fixed rail clamps are tightened with a bolt unraveling machine. Tighten in order.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 6 show an embodiment of a rail rail clamp automatic attaching / detaching device according to claim 1 of the present invention, in which a pair of rails 3, 3 fixed to a sleeper 2 by a rail clamp 1 are provided. On the other hand, the work carriage 5 which can be driven in the direction indicated by the arrow A in the figure by driving the traveling motor 4 has wheels 6, 7
Is placed through.

At a required position of the work carriage 5, an outrigger 9 having a wheel 8 mounted on the other rail 3 at the tip thereof is provided as a fall prevention tool for holding the work carriage 5 so as not to fall. The work trolley 5 is mounted so as to project toward the rail 3, and the work carriage 5 is supported by the outrigger 9 so as to run upright on one rail 3.

Further, the working carriage 5 has a pair of bolt tensioners 1 rotatably provided with a socket wrench portion 11 which can be fitted into the heads of the bolts 10 of the rail clamp 1.
2 and 12 are vertically guided by a guide member 13 and are supported by a lifting motor 14 so as to be lifted and lowered by a wire 16 which is wound around a winch drum 15 and unwound.

A position sensor 17 for detecting the position of the bolt 10 of the rail clamp 1 is disposed at a position forward of the bolt tensioner 12 of the work carriage 5 in the traveling direction, and the position sensor 17 detects the position. Based on the value, the control device 18 that can stop the traveling of the work carriage 5 and start the attachment / detachment work of the rail clamp 1 so that the bolt tensioner 12 is positioned directly above the bolt 10, and the various electric devices described above ( Travel motor 4, bolt tensioner 12, lifting motor 14)
A power supply device 19 for supplying electric power to each of the work carts 5 is loaded at a required position on the work carriage 5.

The stop positioning control of the work carriage 5 by the control device 18 will be described in detail below with reference to FIGS. 4 to 6.

As shown in the upper left part of FIG. 4, the detection width a (see FIGS. 5 and 6) of the head of the bolt 10 is 0 at the start of traveling.

While the work vehicle 5 is traveling, the position sensor 17 always detects the height distance H from the lower object to be detected, and the detected height distance H corresponds to 10 assumed bolts. It is determined whether or not the height is within the range Hn to Hx.

If the height distance H is within the height distance range Hn to Hx, it is determined that the object detected by the current position sensor 17 may be the head of the bolt 10. A travel distance encoder 20 attached to a wheel (wheel 6 in the illustrated example) counts the travel distance S in units of 0 to 0.05 mm.

This counting is repeated until the traveling distance S becomes 2 mm or more. When the traveling distance S becomes 2 mm or more, the process proceeds to YES, and the detection width a (0 at this time) of the head of the bolt 10 is replaced with a + 2. Then, the process returns to the determination as to whether the height distance H is within the height distance range Hn to Hx.

At this time, the height distance H is equal to the height distance range Hn.
If it is in the range of to Hx, it is determined that the position sensor 17 is still passing over the head of the bolt 10 and the process proceeds to YES again and the above-mentioned determination is repeated.

When the position sensor 17 is disengaged from the head of the bolt 10, it is determined that the height distance H detected by the position sensor 17 is not within the height distance range Hn to Hx.
And the detection width a of the bolt 10 head at this point is 10
It is determined whether or not it is mm or more (upper right side of the figure).

Here, the detection width a of the head of the bolt 10 is 10
If it is less than or equal to mm, it is determined that it is not the head of the bolt 10 that is detected by the position sensor 17, the process proceeds to NO, the detection width a is reset to 0, and the above-described determination is repeated from the beginning.

If the detection width a of the head portion of the bolt 10 is 10 mm or more, it is determined that the position sensor 17 detects the head portion of the bolt 10 and the process proceeds to YES, and the traveling distance encoder 20 determines 0 to 0. The mileage L is counted in units of 0.2 mm.

This count is based on the arrangement distance C between the center line of the bolt tensioner 12 and the center line of the position sensor 17 (see FIG. 5).
It is repeated until it becomes equal to or more than the value obtained by subtracting the value obtained by halving, and when the traveling distance L becomes equal to or more than this value, the process immediately proceeds to YES, the traveling of the work carriage 5 is stopped, and the work for attaching and detaching the rail clamp 1 is started. To do.

At this time, in the work carriage 5, from the point where the position sensor 17 passes over the head of the bolt 10 and comes off (the state shown in FIG. 5), the center line of the bolt tensioner 12 and the position sensor 17 are removed.
Since the vehicle travels a distance less than a value obtained by halving the detection width a of the head of the bolt 10 from the arrangement distance C from the center line of the bolt 10 and stops, the bolt tensioning machine 12 is exactly the same. Positioned directly above the head of the bolt 10.

When the work for attaching and detaching the rail clamp 1 is completed, the above control is restarted.

Then, the work carriage 5 is placed on one rail 3 for carrying out the replacement work, and the wheel 8 at the tip of the outrigger 9 is placed on the other rail 3 to move the work carriage 5 at a constant speed by the arrow A. When moving forward in the direction, the position sensor 17 detects the head position of the bolt 10 of the rail clamp 1 to be removed next, and when the bolt tensioner 12 is located immediately above the bolt 10 of the rail clamp 1, the work is performed. The traveling of the carriage 5, that is, the traveling motor 4 is stopped by the control device 18.

Then, the controller 18 controls the lifting motor 1
4, the wire 16 is unwound, the bolt tensioner 12 is lowered, the socket wrench portion 11 of the bolt tensioner 12 is fitted to the head portion of the bolt 10 of the rail clamp 1, and the socket wrench portion 11 is removed. Rotate and bolt 1 of rail clamp 1
Loosen 0.

At this time, the bolt 10 is loosened and raised.
Corresponding to the above, the wire 16 is wound up, and the bolt tensioning machine 12 is lifted while the head of the bolt 10 is fitted with the socket wrench portion 11.

When the bolt 10 of the rail clamp 1 is loosened by the bolt tensioner 12, the rotation of the socket wrench portion 11 is stopped and the bolt tensioner 12 is further raised by a required amount to move the socket wrench portion 11 to the bolt 10. Remove from head.

Thereafter, the same operation as described above is repeated.

On the other hand, when the rail clamp 1 is reattached after the rail 3 is replaced, the worker temporarily fixes the rail clamp 1 to the sleeper 2 with the bolt 10, and the bolt of the temporarily fixed rail clamp 1 is fixed. 10 for bolt tensioner 1
You can tighten them in order by 2.

Therefore, according to the above-described embodiment, the rail clamp 1 can be mechanically and efficiently detached and attached, which conventionally requires a lot of labor and time, and the rail clamp 1 can be removed and attached. Labor saving and time reduction can be achieved.

In addition to the case where the rail 3 must be always replaced at the right and left at once, the outer rail 3 may be deteriorated earlier at a curved position or the like. This is effective when each piece is independently attached and detached.

Furthermore, since the railway rail clamp automatic attaching / detaching device of this embodiment can be manufactured in a relatively small size,
It is easy to raise and lower the rail 3 at the work site (it can be manually raised and lowered), and disassembling work for transportation and assembly work at the work site are unnecessary.

As an overturning prevention tool for holding the work carriage 5 so as not to fall down, in addition to adopting the outrigger 9 described above, the rail 3 on which the work carriage 5 is placed is held so that the work carriage 5 stands upright. A guide roller for holding may be provided to support the monorail type.

FIGS. 7 to 10 show an embodiment of an automatic rail rail clamp attaching / detaching device according to claim 2 of the present invention. In the drawings, the parts designated by the same reference numerals as those in FIGS. 1 to 3 are the same. Represents an object.

As shown in the figure, a pair of rails 3, 3 fixed to a sleeper 2 by a rail clamp 1 is driven by a traveling motor 4 so that the work carriages 21 and 21 can travel in a direction indicated by an arrow A in the figure. Are mounted via wheels 22, 23, 24.

Each of the work carriages 21 and 21 is provided with an inverted U-shaped main frame 25 having wheels 23 and 24 at its lower end and a wheel 22 at the lower surface of the front end and extending parallel to the rail 3 and having the rear end at the main portion. The frame 25 is composed of a bogie frame 26 connected to the lower end on the front side in the traveling direction, and further, the lower end portions of the left and right main frames 25, 25 that oppose each other in the left-right direction, and the middle portion of the left and right bogie frames 26, 26 In addition, the left and right end portions of three link lateral members 27 extending parallel to the sleepers 2 are pivotally mounted horizontally swingably about a pivot shaft 28 extending in the up-and-down direction. Two
The 1, 21 are connected to each other so as not to fall over and support each other.

Further, the bolts 10 of the rail clamp 1 are attached to the main frames 25 of the left and right work carriages 21 and 21.
A pair of bolt tensioners 12, 12 rotatably equipped with a socket wrench portion 11 that can be fitted to the head of the guide member 1
It is vertically guided by 3 and is supported by a lifting motor 14 so that it can be lifted and lowered by a wire 16 that is wound up and unwound through a winch drum 15.

A fixed frame 30 for rotatably supporting a traverse ball screw 29 extending in parallel with the sleeper 2 is attached to the left and right main frames 25 in the vicinity of the bolt tensioner 12, and the fixed frame is attached. A traverse motor 31 for rotating the traverse ball screw 29 is attached to 30. A traverse frame 33 that rotatably supports an up-and-down ball screw 32 extending in the vertical direction is screwed onto the traverse ball screw 29.
An elevating motor 34 for rotating the elevating ball screw 32 is attached to the. Further, the lifting ball screw 3
A gate-shaped elevating frame 35 (see FIG. 10) is screwed into the unit 2 when viewed from the traveling direction, and reverse screws that are rotationally driven by a gripping motor 36 are attached to both lower ends of the elevating frame 35. Hand devices 39 each having a finger portion 38 that is screwed into the open / close ball screw 37 and that can be opened and closed in the traveling direction and that can hold the rail clamp 1 are attached. The above-described traverse ball screw 29, fixed frame 30, traverse motor 31, elevating ball screw 32, traverse frame 33, elevating motor 34, elevating frame 35, and hand device 39 constitute a gripping and conveying device 40.

Further, the bolts 1 of the rail clamp 1 are attached to the carriage frames 26 of the left and right work carriages 21 and 21.
A position sensor 17 for detecting the 0 position is provided, and the bolt tensioner 1 is based on the detection value of the position sensor 17.
The control device 18 that can stop the traveling of the work carriage 21 and start the attachment / detachment work of the rail clamp 1 so that the work 2 is positioned immediately above the bolts 10 has the respective carriage frames 26,
It is loaded on 26.

Here, the stop positioning control of the work carriage 21 by the control device 18 is the same as that described in the previous embodiment, so the description thereof will be omitted.

A power supply device 19 is mounted on the link frame 27 connecting the intermediate portions of the bogie frames 26, 26 via a pedestal (not shown).

Since the rear ends of the bogie frames 26, 26 are directly connected to the front lower ends of the main frames 25, 25 in the traveling direction without being supported by wheels or the like, the bogie frames 26, 26 are not supported. Control device 18 and power supply device 19
Since half of the load of heavy objects such as is carried by the wheels 24 (wheels for traveling drive) connected to the traveling motor 4, slip due to insufficient load of the wheels 24 during traveling is prevented. Is becoming

When the left and right work carriages 21 and 21 are respectively placed on the pair of rails 3 and 3 for exchanging work and both work carriages 21 and 21 are moved forward in the direction of arrow A at a constant speed, The position sensor 17 detects the head position of the bolt 10 of the rail clamp 1 to be removed next, and when the bolt tensioner 12 is located directly above the bolt 10 of the rail clamp 1, the work carriage 21 travels, That is, the traveling motor 4 is stopped by the control device 18.

Then, the controller 18 drives the lifting motor 34 of the gripping and conveying device 40 to rotate the lifting ball screw 32, and the hand device 39 together with the lifting frame 35.
Is lowered with the finger portion 38 opened to hold the rail clamp 1 by the finger portion 38 of the hand device 39, and the lifting motor 14 for the bolt tightening machine 12 is driven to unwind the wire 16 and tighten the bolt. The disassembly machine 12 is lowered, the socket wrench portion 11 of the bolt tensioner 12 is fitted to the head portion of the bolt 10 of the rail clamp 1, and the socket wrench portion 11 is rotated to loosen the bolt 10 of the rail clamp 1.

At this time, the bolt 10 which is loosened and rises
The wire frame 16 is wound up and the hand device 39 is lifted while the rail clamp 1 is held by the finger portion 38 and the bolt tensioner 12 is attached to the head of the bolt 10 and the socket wrench portion. 11
Raise with the mated.

The bolt tensioner 12 and the gripping and conveying device 4
When the bolt 10 of the rail clamp 1 is loosened by 0 and the rail clamp 1 is removed from the sleeper 2, the rotation of the socket wrench portion 11 is stopped and the bolt tensioner 12 is further raised by a required amount to raise the socket wrench portion. 11 is disengaged from the head of the bolt 10 and then the traverse frame motor 33 is driven to reciprocate the traverse frame 33 in parallel with the sleepers 2 and the hand device 39 is moved to the left and right positions with a required distance from the rail 3. Open the finger part 38 to open the rail clamp 1
To drop.

Thereafter, the same operation as described above is repeated.

On the other hand, when the rail clamp 1 is reattached after the rail 3 is replaced, the worker temporarily fixes the rail clamp 1 to the sleeper 2 with the bolts 10, and the bolts of the rail clamp 1 temporarily fixed. 10 for bolt tensioner 1
You can tighten them in order by 2.

Therefore, according to the above-described embodiment, the rail clamp 1 can be mechanically and efficiently detached and attached in the same manner as in the above-described embodiments, and the labor of the rail clamp 1 detachment and attachment can be reduced. Also, the time can be shortened.

Particularly, in this embodiment, the left and right rails 3, 3 are
Since the rail clamp 1 can be removed and attached at the same time, it is effective when the rails 3 and 3 must be replaced at the same time on the left and right.

Further, in this embodiment, the bolt 1 of the rail clamp 1 is controlled by the bolt tensioner 12 and the gripping and conveying device 40.
After loosening 0 and removing the rail clamp 1 from the sleeper 2,
By the gripping and conveying device 40, the rail clamp 1 can be moved in parallel with the sleepers 2 and dropped from the rails 3 to the left and right positions with a required interval, that is, the rail clamps 1 removed from the sleepers 2 interfere with the rail replacement work. Since it can be mechanically transported to a position away from the rail 3 so that it does not occur, the labor burden on the worker can be further reduced.

Further, when the rails 3 and 3 are curved or when the sleeper 2 is out of right angle with respect to the rails 3 and 3, the work bogies 21 and 21 have left and right bolts 10 and 10, respectively. Even if a relative shift occurs in the stop positions of the two work carriages 21 and 21 in the traveling direction due to the stop depending on the position, in the present embodiment, the left and right work carriages 21 and 21 are horizontally swingable links. Since they are connected by the horizontal member 27, the relative displacement can be allowed without difficulty.

The rail rail clamp automatic attaching / detaching device of the present invention is not limited to the above-mentioned embodiment,
Needless to say, various changes can be made without departing from the scope of the present invention.

[0063]

According to the railway rail clamp automatic attaching / detaching device of the present invention described above, various excellent effects as described below can be obtained.

(I) It is possible to mechanically and efficiently perform the work of removing and mounting the rail clamp, which has required a lot of labor and time in the past, so that the work of removing the rail clamp and the work of mounting can be saved. Can be planned.

(II) According to the railway rail clamp automatic attaching / detaching device of the first aspect, it is possible to perform the attaching / detaching work independently for each rail.

(III) Since the railway rail clamp automatic attaching / detaching device according to claim 1 can be manufactured in a relatively small size, it can be easily raised and lowered with respect to the rail at the work site (it can be manually raised and lowered), and it can be transported. There is no need for dismantling work or assembling work at the work site.

(IV) According to the railway rail clamp automatic attachment / detachment device of the second aspect, it is possible to simultaneously remove and attach the rail clamps of the left and right rails.

(V) According to the railway rail clamp automatic attaching / detaching device of the second aspect, the bolts of the rail clamp are loosened by the bolt tensioning device and the gripping and conveying device to remove the rail clamp from the sleeper, and then the gripping and conveying device. The rail clamp can be moved in the direction perpendicular to the traveling direction and dropped from the rail to the left and right positions with the required spacing.
That is, since the rail clamp removed from the sleeper can be mechanically transported to a position away from the rail so as not to interfere with the rail replacement work, the labor burden on the worker can be further reduced.

(VI) According to the railway rail clamp automatic attaching / detaching device of the second aspect, when the rail is curved or the sleepers are out of alignment with the rail at right angles, both work carriages are moved to the left and right. Even if a relative displacement occurs in the stop position in the traveling direction by stopping corresponding to each bolt position, since the left and right work carriages are connected by the horizontally swingable link frame, It is possible to tolerate deviations without difficulty.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of a railway rail clamp automatic attachment / detachment device according to claim 1 of the present invention.

FIG. 2 is a view taken along line II-II in FIG.

FIG. 3 is a view in the direction of arrows III-III in FIG.

FIG. 4 is a flowchart illustrating stop positioning control of a work vehicle by a control device.

FIG. 5 is a schematic diagram illustrating stop positioning control of a work vehicle by a control device.

FIG. 6 is a plan view showing a bolt head detection width by a position sensor.

FIG. 7 is a side view of an embodiment of the railway rail clamp automatic attaching / detaching device according to claim 2 of the present invention.

8 is a view in the direction of arrow VIII-VIII in FIG.

9 is a view in the direction of arrow IX-IX in FIG. 7.

FIG. 10 is a view in the direction of arrow XX in FIG.

[Explanation of symbols]

 1 rail clamp 2 sleepers 3 rails 5 work trolley 9 outriggers (overturning prevention tool) 10 bolts 11 socket wrench part 12 bolt tensioner 17 position sensor 18 control device 21 work trolley 27 link lateral 28 swing axis 40 gripping transfer device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mikiichi Yamano 3-15-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toji Technical Center (72) Inventor Eiichi Kato Sanyo Toyosu, Koto-ku, Tokyo 1-15 Ishikawajima Harima Heavy Industries Co., Ltd. Toji Technical Center (72) Inventor Shigetaka Yazaki 3-1-15-1 Toyosu Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd. Toji Technical Center

Claims (2)

[Claims] 1. A work carriage mounted on one of a pair of rails fixed to a sleeper by a rail clamp so that the work carriage can run, and a fall prevention tool provided on the work carriage for holding the work carriage so as not to fall. A bolt tightening machine having a socket wrench portion capable of moving up and down on the work carriage and tightening and loosening the bolts of the rail clamp, and a position sensor provided on the work carriage for detecting the bolt position of the rail clamp, And a control device capable of stopping the traveling of the work carriage and starting the attachment / detachment work of the rail clamp so that the bolt tensioner is positioned at a position immediately above the bolt based on the detection value of the position sensor. Railway rail clamp automatic attachment / detachment device. 2. A left and right work carriage mounted on each of a pair of rails fixed to a sleeper by a rail clamp so as to be able to travel, and left and right end parts of the left and right work carriage via a vertically extending swing shaft. It has a link horizontal structure pivotally attached to be horizontally swingable about the pivot shaft, and a socket wrench portion which is provided on each of the left and right work carriages so as to be able to move up and down and which is capable of tightening and loosening bolts of the rail clamp. The bolt tensioner and the left and right work carriages are respectively provided so as to be able to move up and down and move in a direction perpendicular to the traveling direction of the work carriages. The rail clamps can be gripped and the gripped rail clamps can be dropped to a predetermined position. The gripping and conveying device, the position sensors provided on the left and right work carriages for detecting the bolt positions of the rail clamps, and the bolt tensioning device based on the detection values of the position sensors. A rail rail clamp automatic attaching / detaching device, comprising: a control device capable of stopping the traveling of the left and right work carriages and starting the attachment / detachment work of the rail clamp so that the rail clamp is positioned immediately above the bolt.