JP2002292577A - Bolt untightening machine for rail tightening bolt and impact wrench using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working efficiency in untightening work for a rail tightening bolt and accuracy in control of a bolt tightening torque. SOLUTION: The bolt untightening machine A for the rail tightening bolt is provided with a main frame 1 equipped with a traveling wheel 1b, a generator unit 2, bolt untightening machine unit 3 containing a power impact wrench 9, a lubricating unit 4 jetting lubricating oil O to a rail tightening bolt B, an operation handle 5 and a handle 6 for vertical movement of the impact wrench 9. The impact wrench 9 of the bolt untightening machine unit 3 provides impact force to unghtightening direction of the rail tightening bolt B when untightening the rail tightening bolt B. When tightening the rail tightening bolt B, on the other hand, the impact wrench 9 does not provide impact force to the tightening direction of the rail tightening bolt. By so doing, a socket 23 provided on the tip is successively rotated to the tightening direction of the rail tightening bolt B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt disengaging machine used for repairing a railway line and an improvement of an impact wrench used for the same, and more particularly, to a rail fastening bolt (hereinafter, referred to as a bolt) for fastening a rail to a sleeper. ) Periodical loosening, lubrication and tightening work (hereinafter referred to as bolt loosening work)
The present invention relates to a bolt disengaging device for a rail fastening bolt and an impact wrench used for the same, which can be efficiently performed with a bolt tightening torque having a predetermined size and no variation.

[0002]

2. Description of the Related Art In a railway track, as a maintenance check of bolts for fastening rails to sleepers, the bolts are loosened at predetermined intervals (usually three years), lubricated, and then bolted again. Tight work is underway. By loosening, lubricating and retightening the bolts, corrosion or rusting of the bolts, loosening due to vibration, etc. is prevented or corrected, and rail safety is secured by fixing the rails to the sleepers with a predetermined strength. Because it is done.

[0003] Conventionally, as a bolt disengaging machine used for this kind of bolt disengaging work, for example, Japanese Patent Publication No. 60-11 / 1985
For example, there is known a bolt disengaging device disclosed in Japanese Patent No. 49,492 and a bolt disengaging device disclosed in Japanese Patent No. 2,608,59 and Japanese Patent No. 2,860,860.

[0004] That is, although not shown, the former bolt disengaging machine according to Japanese Patent Publication No. 60-1149 includes a traveling vehicle traveling on rails, a motor mounted on the traveling vehicle, and a motor mounted on the traveling vehicle. It consists of an oiling device consisting of an oil pump and a nozzle, and a bolt disengaging part which is also mounted on the traveling carriage and consists of a hydraulic motor and a socket. The socket of the bolt disengaging part is fitted to the head of the bolt. The bolt is loosened and tightened by rotating the socket forward and backward by a hydraulic motor, and lubricating oil is ejected from the nozzle of the lubricating device to the bolt when the bolt is loosened.

On the other hand, the bolt disengaging device according to the latter Patent Nos. 260859 and 2860860 is not shown, but a bogie frame running on rails, a generator mounted on the bogie frame, It is composed of a center arm (or horizontal arm) rotatably provided in the bogie frame in the horizontal direction, and an electric impact wrench provided on both ends of the center arm (or horizontal arm) so as to be vertically movable and rotatable. The socket of the impact wrench is fitted to the head of the bolt, and the socket is rotated forward and reverse by the impact wrench to loosen and tighten the bolt.

[0006] The bolt disengaging device and the bolt disengaging device,
In each case, the bolt can be detensioned with a relatively high efficiency by a small number of workers, and has excellent practical utility. However, there are still many problems to be solved in the conventional bolt disengaging machine and the bolt unfastening device. Among them, a particularly problematic point is that the tightening torque at the time of re-tightening the bolt is likely to vary, and the bolt is liable to be varied. It is difficult to improve the efficiency of refining work. In particular, the latter patent 2,608,595
In the bolt disengaging device according to Japanese Patent No. 2860860 and Japanese Patent No. 2860860, since the bolt is tightened by using an impact wrench, the variation in the bolt tightening torque becomes larger than the former, and the work accuracy and work of the bolt unfastening work are increased. There is a problem in the reliability point of. Needless to say, the rail fastening bolt is strongly tightened even if it is slightly rotated because the screw pitch is rough, and the above problem is further promoted.

[0007] The bolt tightening torque in the bolt loosening operation is defined to be in the range of 1300 to 1500 kgf-cm, and it is not possible to maintain the bolt tightening torque in the specified range. It is an important factor in ensuring the safety of the track.

The bolt tightening torque is usually detected by a tightening torque detecting device comprising a load cell or the like provided in the bolt breaking unit, and is displayed on a display panel of the bolt breaking unit every time the bolt is broken. It has become. However, in actual bolt tightening work, a large variation occurs in the displayed bolt tightening torque, and unless the bolt is loosened and tightened several times, the tightening torque does not fall within the specified value range. There are many cases. As a result, the time required for the bolt breaking operation becomes longer, and a problem arises in the reliability of the control accuracy of the bolt tightening torque itself.

[0009]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems in the conventional bolt crusher and bolt crusher,
In other words, the bolt tightening torque tends to vary, making it difficult to improve the efficiency of bolt disengagement work and to solve problems such as low reliability of work accuracy. An object of the present invention is to provide a bolt disengaging device for a rail fastening bolt which hardly causes a variation in bolt tightening torque and an impact wrench used for the same.

[0010]

In order to attain the above object, according to the first aspect of the present invention, there is provided a main frame having traveling wheels, a generator unit, and a bolt having an electric impact wrench. A disintegrator unit, a lubrication unit for injecting lubricating oil to the rail fastening bolt, an operation handle,
A bolt tightener for a rail fastening bolt having an up / down handle for an impact wrench. Further, when the rail fastening bolts are tightened, an impact force in the tightening direction is not applied to the rail fastening bolts, and a socket provided at a tip portion is configured to rotate continuously.

According to a second aspect of the present invention, there is provided an electric motor provided in a case, a spindle rotated forward and reverse by the electric motor, and a hammer rotatably and axially fitted to the spindle. An anvil rotatably supported on the case side and meshable with the hammer, and a spring for urging the hammer toward the anvil side and meshing with the anvil,
A socket connected to the head of the rail fastening bolt connected to the anvil, and provided between the spindle and the anvil to transmit the rotation of the spindle to the hammer and to move the hammer from the anvil according to the load applied to the anvil and the socket. A cam mechanism that separates the hammer from the anvil by the cam mechanism according to the load applied to the anvil and the socket, and idles the hammer. In an electric impact wrench configured to apply an impact force to an anvil and a socket, the cam mechanism includes:
When the rail fastening bolt is loosened, the hammer is separated from the anvil when the load on the anvil and socket becomes greater than the biasing force of the spring. The rotation of the hammer is always transmitted to the hammer, and the hammer cannot move in the direction away from the anvil.

Further, according to the invention of claim 3 of the present invention, the cam mechanism comprises a depression having an inclined guide groove formed on the outer peripheral surface of the spindle and an inclined cam surface formed on the inner peripheral surface of the hammer. Part, and a ball that is fitted into the guide groove and the recess and rolls along the guide groove and the cam surface, and the inclination direction of the guide groove and the shape of the recess are such that when the rail fastening bolt is loosened, When the load on the anvil and the socket is greater than the urging force of the spring, the hammer is separated from the anvil.When the rail fastening bolt is tightened, the rotation of the spindle is constantly transmitted to the hammer, and the hammer is separated from the anvil. It is characterized in that each is set so that it cannot be moved.

[0013]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a bolt disengaging machine A according to an embodiment of the present invention. The bolt disengaging machine A includes a main frame 1 having traveling wheels 1a.
, Generator unit 2 and electric impact wrench 9
Bolt disintegrator unit 3 equipped with
, An operation handle 5, an up / down movement handle 6 of an impact wrench 9, and seven main components of a controller unit 7. Each of the components 1 to 7 is disassembled and carried into a track repair site. Then, each component 1
7 are assembled to form a bolt disengaging machine A.

As shown in FIG. 1, the main frame 1 comprises a frame body 1a made of a rectangular tubular channel material, and running wheels 1b rotatably provided at a front end and a rear end of the frame body 1a. The two traveling wheels 1a are adapted to travel along the rail R by being fitted to the tread surface of the rail R to be bolted. or,
The frame main body 1 includes a bolt disengaging unit 3 described later.
The support pieces and mounting holes necessary for detachably fixing the support frame 8 of the lubrication unit 4, the support frame 25 of the lubrication unit 4, and the support frame 31 of the controller unit 7 are appropriately provided.

The generator unit 2 includes a generator (not shown) and an engine (not shown). As shown in FIGS. 1 and 3, the generator unit 2 is provided on the front end side of the support frame 31 of the controller unit 7. It is placed. The generator unit 2 supplies electric power to an electric motor 15 of the impact wrench 9 of the bolt disassembling unit 3 and an electric motor (not shown) of the lubrication unit 4 to be described later. The generator of the generator unit 2 has a rated output (AC) of 2.8 kVA, a rated output (DC) of 144 W, a frequency of 50 Hz / 60 Hz, an AC voltage of 100 V, an AC current of 28 A, a DC voltage of 12 V, a DC current of 12 A, An inverter generator manufactured by Honda Motor Co., Ltd. with a rate of 1.0 is used. Also, the engine has a maximum output of 3.82 kW (5.2 PS) / 3600r
An air-cooled 4-cycle gasoline engine manufactured by Honda Motor Co., Ltd. having a total displacement of 196 cm ³ at pm is used.

As shown in FIGS. 1 to 4, the bolt disengaging unit 3 includes a support frame 8, two electric impact wrenches 9 provided vertically on the support frame 8, and each impact It comprises an automatic torque detecting device 10 such as a rotary encoder for detecting the rotational driving torque of the wrench 9 and a display / operation panel 11 for controlling the operation of the bolt disintegrating unit 3.

That is, the support frame 8 is a substantially cubic frame which is detachably fixed to the rear end of the main frame 1, and is attached to the guide shafts 12 located at the four corners of the support frame 8. A support plate 13 for supporting and fixing the impact wrench 9 is vertically movably supported. The support plate 13 is moved up and down by operating a vertically moving handle 6 described later. Therefore, the impact wrench 9 fixed to the support plate 13 moves up and down with respect to the support frame 8 by moving the support plate 13 up and down with the handle 6 for up and down movement. Note that the support frame 8 is configured so that it can be divided into two parts in the left-right direction so as to be easily carried.

The two impact wrenches 9 apply an impact force to the bolt B in the loosening direction when the bolt B is loosened.
Further, when the bolt B is tightened, an impact force in the tightening direction is not applied to the bolt B, and the socket 23 provided at the tip portion is configured to rotate continuously.

That is, as shown in FIG. 5, the two impact wrenches 9 are provided at the rear end of the case 14 and the output shaft 15a is rotatably supported via a bearing (not shown). 15, a spindle 16 rotatably supported in a case 14 via a bearing (not shown), and having a flange 16a formed at a rear end portion, and a spindle 16 between an output shaft 15a of the electric motor 15 and the spindle 16. A reduction mechanism 17 for transmitting the rotational force of the electric motor 15 to the spindle 16, and a pair of ridges 18 a fitted to the spindle 16 so as to be rotatable and movable in the axial direction, and arranged at the distal end in the diameter direction. A tubular hammer 18 formed,
An anvil 19 rotatably supported at the tip end side of the case 14 and having a pair of diametrically extending ridges 19a at its rear end having play and engagement with the ridges 18a of the hammer 18; 18 and an anvil 19 via a washer 20 and a number of balls 21,
8 is urged to the anvil 19 side to project the ridge 18a of the hammer 18.
2 that meshes with the ridge 19a of the anvil 19
2 and a socket 2 that is connected to the tip of an anvil 19 protruding from the tip of the case 14 and fits into the head of the bolt B.
3 and a cam mechanism 24 provided between the spindle 16 and the anvil 19 to transmit the rotation of the spindle 16 to the hammer 18 and to separate the hammer 18 from the anvil 19 according to the load applied to the anvil 19 and the socket 23. The hammer 18 is separated from the anvil 19 by the cam mechanism 24 according to the load applied to the anvil 19 and the socket 23 and idles. The impact member 19 impacts the anvil 19 and the socket 23.

The speed reduction mechanism 17 is diametrically arranged on a gear 17a formed on the outer peripheral surface of the output shaft 15a of the electric motor 15 and on a flange 16a of the spindle 16, and is rotatably supported by a support shaft 17d. The planetary gear mechanism includes two idle gears 17b meshing with the gear 17a of the output shaft 15a of the electric motor 15, and a ring gear 17c fixed to the inner peripheral surface of the case 14 and meshing with the idle gear 17b. , The output shaft 15a of the electric motor 15
When the is rotated in the forward and reverse directions, the two idle gears 17b rotate while being guided by the ring gear 17c, thereby rotating the spindle 16 at a reduced speed.

Further, when the bolt B is loosened, when the load applied to the anvil 19 and the socket 23 becomes larger than the urging force of the spring 22, the cam mechanism 24
8 is separated from the anvil 19, and when the bolt B is tightened, the rotation of the spindle 16 is constantly transmitted to the hammer 18 regardless of the load applied to the anvil 19 and the socket 23, and the hammer 18 moves in the direction away from the anvil 19. It is configured to be disabled. Specifically, the cam mechanism 24 is attached to the outer peripheral surface of the spindle 16 by 180
And two slanted guide grooves 24a which are formed at an interval of ° and are slanted in the same direction with a limited length, and a hammer 18
And two guides 24a and 24b, each of which has an inclined cam surface 24b 'which is formed on the inner peripheral surface of the guide groove and faces in the same direction.
4a and a pair of balls 24c (steel balls) rolling along the cam surface 24b '.
The slanting direction of 4a and the shape of the recess 24b are such that when the bolt B is loosened, the hammer 18 is separated from the anvil 19 when the load applied to the anvil 19 and the socket 23 becomes larger than the urging force of the spring 22. When tightening B, the rotation of the spindle 16 is always transmitted to the hammer 18, and the hammer 18 is set so as not to be able to move in the direction away from the anvil 19.

In the impact wrench 9, when the electric motor 15 rotates the socket 23 in a direction in which the bolt B is loosened while the socket 23 is fitted to the head of the bolt B, the urging force of the spring 22 causes the anvil to be released. In the initial stage where the torque is larger than the torque of the
Is pushed forward by the urging force of the spring 22, so that the ridge 18a of the hammer 18
It rotates while meshing with the ridge 19a. However, when the bolt B is loosened, the bolt 23 is firmly fixed to the sleeper due to corrosion and rust of the bolt B, so that the torque at which the socket 23 loosens the bolt B is larger than the urging force of the spring 22. Therefore, a large force acts between the anvil 19 and the ridges 18a, 19a of the hammer 18, and a large force acts between the spindle 16 and the hammer 18 via the ball 24c. The hammer 18 is lifted by moving backward along the guide groove 24a. That is, when a force equal to or more than a predetermined value acts between the anvil 19 and the hammer 18, the hammer 18 retreats and the engagement between the ridge 18 a of the hammer 18 and the ridge 19 a of the anvil 19 is lost.
Idling. When the ridge 18a of the hammer 18 gets over the ridge 19a of the anvil 19, the hammer 18
Moves forward to the anvil 19 side by the urging force of the spring 22, and collides with the anvil 19 after idling with respect to the anvil 19 by a predetermined angle. By repeating the phenomenon in which the hammer 18 idles and collides with the anvil 19, an impact force is sequentially applied to the bolt B via the socket 23. Therefore, even the bolt B firmly screwed to the sleeper is loosened easily and easily by the impact force given from the socket 23.

On the other hand, when the electric motor 15 rotates the socket B in the direction in which the bolt B is tightened while the socket 23 is fitted to the head of the bolt B, the bolt B is once loosened. Can be. At this time, the hammer 18 causes the anvil 19
And is constantly meshed with the anvil 19.
The hammer 18 is moved by the cam mechanism 24 to the anvil 19.
And the anvil 19 regardless of the load on the socket 23.
The rotation of the spindle 16 is constantly transmitted because it is impossible to move in a direction away from the spindle 16. As a result, the rotational force of the spindle 16 is continuously transmitted to the hammer 18, the anvil 19 and the socket 23, and the bolt B is continuously tightened.

The above-mentioned two impact wrenches 9 are fixed to a support plate 13 which is supported on a guide shaft 12 of a support frame 8 so as to be movable up and down. It is performed by its own weight. The lifting of the impact wrench 9 is performed by operating a vertically movable handle 6 provided on the support frame 8 so as to be swingable. The impact wrench 9 is simultaneously lifted upward (dotted line position in FIG. 2). Conversely, when the vertical movement handle 6 is released and returned to the home position (solid line position in FIG. 2), each impact on both sides is reduced. The wrench 9 is individually moved downward by its own weight. Further, although not shown, an auxiliary spring mechanism for pulling up, a damper device for preventing an impact at the time of descent, and a stopper mechanism for limiting the amount of movement in the up and down direction are used to make the up and down movement of the impact wrench 9 smooth. Are provided on the support frame 8.

The performance of the two impact wrenches 9 is as follows:
The number of revolutions is 1400 rpm, the number of impacts is 1500 times per minute, the tightening torque is 10000 kg-cm (maximum), and the electric motor 15 of the impact wrench 9 has a voltage of 100 V, a current of 15 A, a frequency of 50 to 60 Hz, and a power consumption of 1300 W. A child motor is used. The tightening torque when tightening the bolt of the impact wrench 9 is 1300
It is set to 1500 kg-cm, and the maximum torque during tightening and loosening is selected to be 3400 kg-cm. Furthermore, the capacity of the bolt B to be disengaged is set to about 1000 bolts / Hr (rail R extension about 300 m).
The net time required for unraveling the two bolts B on the left and right sides of the rail R is about 10 seconds.

The automatic torque detecting device 10 for detecting the rotational driving torque of the impact wrench 9 detects the number of rotations, the rotational speed, the rotational angle, etc. of the output shaft 15a of the electric motor 15, and detects the rotational driving torque from the detected values. So-called rotary encoder type automatic torque detector 10 for calculating
Is used. The automatic torque detecting device 10 is provided at an upper end of the impact wrench 9. Since the rotary encoder type automatic torque detecting device 10 for detecting the rotational driving torque of the impact wrench 9 is known, a detailed description thereof will be omitted here.

The display / operation panel 11 sets the operating conditions of the bolt disintegrator unit 3 and displays the torque generated by the two impact wrenches 9 (bolt tightening torque). As shown in FIG. 3, it is attached to the upper end of the support frame 8. In FIG. 9, 11
a is a torque display panel, 11b is a unit selection switch, 11c is a bolt tightening / loosening selection switch, 11d
Is a torque selection switch, 11e is a lubricating oil control switch,
11f is a measurement abnormality display lamp, and 11g is an alarm buzzer.

The torque display panel 11a is provided in a pair on the front of the display / operation panel 11. The torque display panel 11a on the left displays the torque generated by the impact wrench 9 on the left and the torque display on the right. Display panel 1
1a, the generated torque of the right impact wrench 9 is displayed. The unit selection switch 11b is operated to switch the operation of the entire bolt disintegrating unit 3, the operation of only the left side of the bolt unraveling unit 3, and the operation of only the right side of the bolt unraveling unit 3. The operation and the operation of the entire bolt disintegrating unit 3 can be stopped. Further, the bolt tightening / loosening selection switch 11c is operated by switching the bolt tightening / loosening selection switch 11c, thereby automatically operating the loosening and tightening of both impact wrenches 9 of the bolt disengaging unit 3 (3500 kg-
cm when the torque is not loosened, it stops automatically), operation of only tightening both impact wrenches 9, operation of only loosening both impact wrenches 9, loosening of both impact wrenches 9
Both of the tightening operations can be stopped.
In addition, when the torque selection switch 11d is switched over, the two-impact during the continuous operation of the lubricating oil heater (not shown) of the lubrication unit 4 described later and the tightening operation of the bolt B by the bolt disengaging unit 3 are performed. The wrench 9 operates at a low voltage, and the voltage supplied to both impact wrenches 9 is switched from a low voltage to a medium voltage when the bolt B is tightened by the bolt disintegrating unit 3, so that both impact wrenches 9 operate at a medium voltage. , Bolt disintegrator unit 3
Impact wrench 9 when tightening bolt B
The voltage supplied to the impact wrench 9 is switched from a low voltage to a high voltage so that both impact wrenches 9 can operate at a high voltage. That is, torque control of both impact wrenches 9 is performed by controlling the voltage supplied to both impact wrenches 9 by the unit selection switch 11d.

Then, when the lubricating oil control switch 11e of the display / operation panel 11 is pressed, the lubricating unit 4 described later is operated, and the lubricating oil O for one time is discharged from the lubricating oil jet nozzle 29a. When the lubricating oil control switch 11e is set to automatic, the bolt B
At the start of tightening, the lubricating oil O is automatically spouted from the lubricating oil spouting nozzle 29a. The measurement abnormality display lamp 11f is
When the torque generated by the left impact wrench 9 is abnormal, the left measurement abnormality display lamp 11f is turned on and the generated torque of the right impact wrench 9 is abnormal. In this case, the measurement abnormality display lamp 11f on the right side is turned on, and the abnormality of the torque generated in both impact wrenches 9 is displayed. In addition, when one of the left and right measurement abnormality display lamps 11f is turned on, the alarm buzzer 11g sounds. Further, although not shown, the display / operation panel 11 has a buzzer stop button for resetting the measurement abnormality display lamp 11f and stopping the alarm buzzer 11g, and a work lamp (not shown) provided on the bolt disengaging machine A. There is provided an illumination switch for turning on and off the LED, and an abnormal data write button for storing abnormal data when data is abnormal.

As shown in FIGS. 1 and 2, the lubrication unit 4 includes a support frame 25, an oil tank 26, a lubricating oil pump 27, an electric compressor 28, a lubricating oil supply pipe 29, A predetermined amount of height is applied to the outer peripheral surface of the bolt B having a nozzle 29a, a lubricating oil hose (not shown), and the like, which is loosened by the impact wrench 9 of the bolt disassembling unit 3 and whose head is lifted upward. The lubricating oil O having a viscosity is sprayed and applied. Also, lubrication unit 4
The support frame 25 on which the oil tank 26, the lubricating oil pump 27 and the electric compressor 28 are mounted is fixed to the front part of the frame body 1a, and the lubricating oil supply pipe 29 and the lubricating oil jet nozzle 29a are bolted. It is provided on the support frame 8 of the disintegrator unit 3.

Specifically, the oil tank 26 stores high-viscosity lubricating oil O, and is provided with a lubricating oil heater (not shown) for heating the lubricating oil O to weaken the viscosity. I have. In the bolt disengaging operation, the durability of the bolt protection function greatly varies depending on the characteristics (particularly the viscosity) of the lubricating oil O to be injected. Generally, the higher the viscosity of the lubricating oil O to be injected, the higher the durability of the bolt protection function,
For example, when non-drying industrial grease oil (Cosmo Oil Lubricants Co., Ltd.) is used, a conventional non-drying low-viscosity lubricating oil (Cosmo Oil Co., Ltd., JROS640) is used.
No. 07-10), the inspection interval can be extended to 6 years compared to the inspection interval (3 years). Therefore, in this embodiment, non-drying industrial grease (G-4) manufactured by Cosmo Oil Lubricant Co., Ltd. is used for the high-viscosity lubricating oil O.

The pump 27 supplies a fixed amount of high-viscosity lubricating oil O to the lubricating oil jet nozzle 29a via a hose and supplies the lubricating oil O to the lubricating oil pump 27 in this embodiment. Uses a diaphragm pump having a discharge rate of 7 cc / 1 time (adjustable).

Further, the electric compressor 28 drives the lubricating oil pump 27, and is a compressor (not shown) for compressing air, an electric motor (not shown) for driving the compressor, and discharged from the compressor. The tanks are small and light in weight, each having a tank (not shown) for storing compressed air in a case, and drive the lubricating oil pump 27 by supplying compressed air to the lubricating oil pump 27. The electric compressor 28 and the lubricating oil pump 27 (diaphragm pump)
As a result, the high-viscosity lubricating oil O is supplied to the lubricating oil jet nozzle
Supplied to

As shown in FIG. 4, the lubricating oil supply pipe 29 is disposed on the side of the socket 23 of each of the impact wrenches 9 in parallel and in a vertical direction. It is supported on the support frame 8 so as to be movable up and down. That is, the lubricating oil supply pipe 29 is interlockingly connected to the impact wrench 9 supported on the support frame 8 so as to be able to move up and down via an operating rod 30 pivotally supported. Is lowered and the socket 23 is fitted to the head of the bolt B.
As a result, the lubricating oil supply pipe 29 is lifted upward, and the lubricating oil ejection nozzle 29a is positioned above the socket 23 (left side in FIG. 4). Conversely, bolt B
Is loosened and the impact wrench 9 is pushed up by the rise of the head of the bolt B, the lubricating oil supply pipe 29 is pushed down via the operating rod 30, and the high-viscosity lubricating oil O is discharged from the lubricating oil ejection nozzle 29a. A predetermined amount (for a fixed time) is ejected toward the outer surface of the bolt B through the gap between the rail fixing leaf springs (see the right side of FIG. 4). It is needless to say that the amount of the lubricating oil O to be spouted (spouting time) and the height position of the lubricating oil supply pipe 29 can be adjusted, but the description thereof is omitted here.

The operating handle 5 has a lower end detachably connected and fixed to a rear end of the main frame 1, and operates the operating handle 5 to manually move the bolt disengaging machine A forward and backward. The operation handle 5 includes a start button 5a of the bolt disengaging machine A, a mark button 5b for recording the operation start position of the disengaging machine on the PC card, and an impact wrench when the bolt B is insufficiently tightened. And a push button 5c for re-activating the bolt 9 is provided. When the operator (operator) operates the start button 5a, the bolt breaking operation is started and the mark button 5b is pressed. As a result, the reference point such as the starting position of the refining operation is controlled by the IC card (PC
Card). Further, when the use push button 5c is pressed, the impact wrench 9 is operated again to loosen and tighten the bolt B again.

The up / down movement handle 6 is located on the right side of the operation handle 5 and is attached to the support frame 8 of the bolt disengaging unit 3 so as to be detachable and vertically swingable. Are engaged with both impact wrench 9 sides. Therefore, by pressing down the base end (handle side) of the vertical movement handle 6, both impact wrenches 9 are lifted upward by a predetermined dimension, and the base end (handle side) of the vertical movement handle 6 is lifted (original). The impact wrench 9 is individually lowered by its own weight. In addition, both impact wrench 9
It is needless to say that the distance range in which the moving direction of the moving object moves up and down is appropriately regulated by a stopper or the like.

The controller unit 7 is composed of a support frame 31 and a controller main body 32. The controller main body 32 is placed at the center of the support frame 31. The base end of the support frame 31 is detachably fixed to an intermediate portion of the frame body 1a, and the front end of the support frame 31 has running wheels 31a fitted to the other rail R. Is attached. The traveling wheels 31a and the traveling wheels 1b provided before and after the main frame 1 allow the bolt disengaging machine A to travel stably on the rails R on both sides.

The controller main body 32 is formed in a waterproof box as shown in FIG. 3, and a PC card unit main body 32a is stored therein. The PC card unit main body 32a is a PC card (Personal Computer M) which is a kind of so-called IC card.
(Emory Card), an electric motor 15 of the impact wrench 9 from the automatic torque detecting device 10 provided in the impact wrench 9 and an interlock signal from the programmable controller 11h provided in the display / operation panel 11 of the bolt crusher unit 3. It converts and records an electric signal related to the rotation torque of the controller into a digital signal, and is stored inside the controller main body 32. That is, on the front side of the PC card unit main body 32a, a lead display section, P
A C card slot, a CPU bus interface connector and the like are provided, and a serial communication connector system switch and the like are provided inside the front cover. FIG.
In 32b, clearing and writing of data are ON
PC card switch that can be operated in the state of
PC write switch for writing data to the card, 32
d is a clear switch for erasing data recording inside the controller, and 32e is a cover covering a PC card slot and the like.

The interlock signal such as the rotation torque signal of the electric motor 15 detected by the automatic torque detector 10 and the start signal / mark signal from the programmable controller 11h is input to the PC card unit main body 32a. Here, the digitalized signal is recorded on the PC card inserted into the PC card slot. Specifically, information such as the number of each bolt B that has been disengaged, the loosening torque, the tightening torque, the work start position mark, and the like are written and recorded on the PC card. PC if work is completed
Remove the card and keep it as a record.

Since the PC card unit main body 32a itself is known, a detailed description thereof will be omitted here. Also, the storage capacity of the PC card is
The necessary data is read out, organized, and managed by inputting a PC card, which is about 6,000 lines (rail R length about 1500 m) and records data such as bolt tightening torque, to a personal computer. It is.

Next, repair of a line using the bolt disengaging machine A according to the embodiment of the present invention will be described. First, the main frame 1, the generator unit 2, the bolt disintegrator unit 3, the lubrication unit 4, the operation handle 5, the handle 6 for vertical movement, the controller unit 7 and the like are brought into the deconsolidation work site,
At this point, the bolt disassembling machine A is assembled.

Next, the generator unit 2 and the lubricating unit 4 are activated, and the switches and the like of the display / operation panel 11 of the bolt disintegrator unit 3 and the controller main body 32 of the controller unit 7 are moved to predetermined positions.・ Set each range.

Thereafter, the main frame 1 is moved by operating the operation handle 5, and the sockets 2 of both impact wrenches 9 are moved.
3 is located immediately above the bolt B to be the first de-contamination work. Next, the impact wrench 9 itself is lowered by operating the up / down movement handle 6, and the socket 23 is fitted to the head of the bolt B. Then, mark button 5
Press b to record the work start reference position (designate the first bolt B) and press the start button 5a to
The bolt disengaging operation of the first bolt B is started.

That is, when the start button 5a is pressed, the impact wrench 9 operates and the socket 23 is
Is rotated in the direction to loosen. At this time, if the bolt B is firmly fixed to the sleeper side due to corrosion or rust, an impact force is applied to the socket 23. As a result, even if the bolt B is firmly screwed to the sleeper, the socket 2
It is loosened easily and easily by the impact force given by 3.

Then, just before the bolt B comes off, the operation of the impact wrench 9 stops, and the work of loosening the bolt B ends. When the loosening of the bolt B is completed, the bolt is automatically tightened and the lubricating oil O is injected. That is, the impact wrench 9 is raised by loosening the bolt B, and the lubricating oil supply pipe 29 and the lubricating oil jet nozzle 29
a descends to a predetermined position and the electric compressor 2
8 and the lubricating oil pump 27 are operated, and high-viscosity lubricating oil is jetted from the lubricating oil jet nozzle 29a into the gap between the rail fixing leaf springs and adheres to the outer surface of the bolt B.

When the bolt B is tightened, the electric power supplied to the impact wrench 9 is reduced to reduce the torque of the impact wrench 9, and as the bolt B is tightened, the torque selection switch 11d causes an impact. The power supplied to the wrench 9 is switched from low voltage to medium voltage and from medium voltage to high voltage, and the bolt B is tightened while increasing the torque of the impact wrench 9. The switching of the torque selection switch is performed while looking at the torque display panel 11a of the display / operation panel 11.

When the bolt B is in a predetermined torque range (1300)
(~ 1500 kg-cm), the supply of power to the impact wrench 9 is stopped, and the operation of the impact wrench 9 is stopped. Thus, the first bolt B (two bolts) is released. At this time, the impact wrench 9 is configured so that the socket 23 rotates continuously regardless of the load applied to the socket 23 side. Can be tightened with a range. Thus, the first bolt B (two bolts) is completely disengaged, the bolt disengaging machine A is moved to a position above the second bolt B, and the next bolt disengaging operation is performed.

When the bolt tightening torque is 1300 to 15
When it is out of the range of 00 kg-cm, the measurement abnormality display lamp 11f of the display / operation panel 11 is turned on and the alarm buzzer 11g sounds. At this time, if the tightening of the bolt B is insufficient, the push button 5c provided on the operation handle 5 is pressed. Then, the impact wrench 9 for which the tightening torque is insufficient is operated again, and the bolt B is re-loosened and re-tightened, and the bolt B is tightened with the predetermined tightening torque. If the tightening torque of the bolt B is continuously lower than the specified value, the bolt B may be replaced because the screw of the bolt B may be damaged. If the maximum tightening torque exceeds 3400 kg-cm, the operation of the impact wrench 9 is automatically stopped.

The tightening torque of the bolt B is detected by the automatic torque detector 10, and the detected electric signal is digitized by the controller unit 7 and recorded on the PC card. The PC card on which the data such as the bolt tightening torque is recorded is removed from the bolt disassembling machine A, and the data is arranged, classified, managed, printed, etc. through a separately provided personal computer or the like.

The bolt disengaging machine A comprises a main frame 1, a generator unit 2, a bolt disengaging unit 3, an oiling unit 4, an operating handle 5, an up / down moving handle 6, and a controller unit 7. The bolt disengaging machine A is assembled by assembling the units 1 to 7 at the site of the bolt disengaging operation. As a result, it is extremely easy to carry the bolt disintegrator A to the site, and the time required for work preparation can be greatly reduced. Further, since the bolt disintegrator A uses the electric compressor 28 and the lubricating oil pump 27 of a diaphragm pump type to lubricate the bolt B, the non-drying high-viscosity lubricating oil O is used as the lubricating oil O. Even in the case where the bolt B is used, the bolt can be smoothly applied to the outer surface of the loosened bolt B, and the pitch interval of the regular bolt loosening operation can be extended. Further, the bolt disintegrator A is provided with a controller unit 7 for digitizing detection signals such as bolt tightening torque detected by the bolt disintegrator unit 3 and recording these data signals on a PC card. Configuration. As a result, the management and arrangement of data such as bolt tightening torque in the bolt disassembly work can be performed extremely accurately and easily, the number of personnel required for recording and the like can be reduced, and the disassembly work cost is greatly increased. Reduction is possible.

[0051]

As described above, the bolt disengaging device of the present invention
It is composed of a main frame, a generator unit, an electric impact wrench, and the like. The impact wrench gives an impact force in the loosening direction to the bolt when the bolt is loosened, and does not give an impact force in the tightening direction to the bolt when the bolt is tightened. And the socket provided at the tip end is configured to rotate continuously in the bolt tightening direction, so that there is a large variation in bolt tightening torque as in a conventional bolt disengaging machine using a hydraulic motor or impact wrench. Does not occur, and it is possible to prevent a variation in bolt tightening torque in the bolt disengaging operation. As a result, the time required for the bolt disengaging operation is shortened, so that the working efficiency can be greatly improved, and the reliability of the control accuracy of the bolt tightening torque itself is also greatly improved. Further, the impact wrench of the present invention is configured such that when the bolt is loosened, a shock in the loosening direction is first applied to the bolt, and when the bolt is tightened, the socket is continuously rotated to continuously tighten the bolt. as a result,
Even if the bolt is firmly fixed to the sleeper, it can be loosened relatively easily, and the tightening torque does not become too large when tightening the bolt, and the bolt is tightened with a predetermined range of tightening torque. be able to.

[Brief description of the drawings]

FIG. 1 is a partially omitted plan view showing a bolt repair machine for repairing a track according to an embodiment of the present invention.

FIG. 2 is a partially omitted side view of the bolt disengaging machine.

FIG. 3 is a partially omitted front view of the bolt disengaging machine.

FIG. 4 is a partially omitted front view of the bolt disintegrator unit.

FIG. 5 is a partially cutaway front view of an electric impact wrench.

FIG. 6 is a front view of a spindle of the impact wrench.

FIG. 7 is a bottom view of a hammer of the impact wrench.

FIG. 8 is a longitudinal sectional view of a hammer of an impact wrench.

FIG. 9 is a front view of a display / operation panel of the bolt disintegrator unit.

[Explanation of symbols]

A is a bolt disintegrator, B is a rail fastening bolt, O is a high-viscosity lubricating oil, 1 is a main frame 1, 1b is a traveling wheel, 2 is a generator unit, 3 is a bolt disintegrator unit, and 4 is a lubrication unit. 5 is an operation handle, 6 is a handle for vertical movement, 9
Is an impact wrench, 14 is a case, 15 is an electric motor, 16 is a spindle, 18 is a hammer, 19 is an anvil, 22 is a spring, 23 is a socket, 24 is a cam mechanism, 24a is a guide groove, 24b is a guide groove, 24b is a recess, 24b ' Is a cam surface and 24c is a ball.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Satoshi Shinno 2-2-113 Shibata, Kita-ku, Osaka-shi, Osaka West Nippon Kikai Main Line Co., Ltd. (72) Inventor Eiji Kawano 1 Oyodokita, Kita-ku, Osaka, Osaka No. 1-114 Nakamichi Brothers Co., Ltd. F-term (reference) 2D057 BA29 3C038 AA01 AA03 BC04 BC07 CA06 CB03 CC01 CC04 EA02 EA04 EA06

Claims (3)

[Claims] 1. A main frame (1) having running wheels (1b), a generator unit (2), and a bolt disengaging unit (3) having an electric impact wrench (9).
And a lubrication unit (4) for injecting lubricating oil (O) to the rail fastening bolt (B), an operation handle (5), and a handle (6) for vertically moving the impact wrench (9). The bolt wrench (A) of (B), wherein the impact wrench (9) of the bolt crusher unit (3) is loosened toward the rail fastening bolt (B) when the rail fastening bolt (B) is loosened. Gives the impact of
Also, when tightening the rail fastening bolt (B), an impact force in the fastening direction is not applied to the rail fastening bolt (B), and the socket (23) provided at the tip end is continuous in the fastening direction of the rail fastening bolt (B). A bolt disengaging device for a rail fastening bolt, which is configured to rotate. 2. An electric motor (15) provided in a case (14), a spindle (16) rotated forward and reverse by the electric motor (15), and rotatable by the spindle (16) and movable in the axial direction. A fitted hammer (18);
The case (14) is rotatably supported by the hammer (1).
8) Anvil (19) meshable with hammer (18)
(22) that urges the anvil (19) toward the anvil (19) and engages with the anvil (19); and a socket (23) that is connected to the anvil (19) and fits into the head of the rail fastening bolt (B). , Spindle (16) and anvil (1
9), the rotation of the spindle (16) is transmitted to the hammer (18), and the hammer (18) is separated from the anvil (19) according to the load applied to the anvil (19) and the socket (23). A cam mechanism (24) for moving the hammer (18) away from the anvil (19) by the cam mechanism (24) according to the load applied to the anvil (19) and the socket (23). The hammer (18) idled by the angle is caused to collide with the anvil (19) by the urging force of the spring (22) to cause the anvil (1) to rotate.
In the electric impact wrench (9) for applying an impact force to the socket (23) and the socket (23), the cam mechanism (24) is provided with the anvil (19) and the anvil (19) when the rail fastening bolt (R) is loosened. When the load on the socket (23) is greater than the biasing force of the spring (22), the hammer (18) is separated from the anvil (19);
When the rail fastening bolt (B) is tightened, the rotation of the spindle (16) is constantly transmitted to the hammer (18) regardless of the load applied to the anvil (19) and the socket (23), and the hammer (18) is moved by the anvil (18). 19) An impact wrench for a bolt disengaging machine, wherein the impact wrench is configured to be immovable in a direction away from the bolt wrench. 3. The cam mechanism (24) is connected to a spindle (1).
6) An inclined guide groove (24a) formed on the outer peripheral surface
And a recess (24b) having an inclined cam surface (24b ') formed on the inner peripheral surface of the hammer (18), and the guide groove (24a) and the guide groove fitted into the recess (24b). (24a) and a ball (24c) rolling along the cam surface (24b '), and the guide groove (24a)
And the shape of the recess (24b) is such that when the rail fastening bolt (B) is loosened, the load applied to the anvil (19) and the socket (23) becomes greater than the urging force of the spring (22). (18) is separated from the anvil (19), and when the rail fastening bolt (B) is tightened, the rotation of the spindle (16) is controlled by the hammer (1).
The impact wrench according to claim 2, characterized in that the hammer (18) is set so as to be constantly transmitted to the anvil (19) and cannot move in a direction away from the anvil (19).