JPH078515Y2 - Cord winding device for feeding power to work equipment - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is equipped on a transport vehicle for winding and unwinding a power supply cord for electrically connecting a working machine and a transport vehicle, which work especially in a spinning factory. The present invention relates to a power feeding cord winding device.

[Prior Art] Generally, in spinning factories, a large number of spinning machine stands are installed in parallel, and it is necessary to use a self-propelled working machine to perform operations such as changing tubes and roving that are necessary on the spinning machine stand. , One work machine takes charge of work of many spinning machine stands.
For example, in the case of a spinning machine of a ring spinning machine, as shown in FIG. 7, a carrier that moves on a rail 42 laid on the side of the spinning machine base 41 in a direction orthogonal to the spinning machine base 41. Spinning machine base 41 that requires a pipe replacement in a state where the pipe replacement device 44 is mounted on the car 43
It is transported to the position corresponding to
The drive mechanism installed in itself moves along the spinning machine base 41 to perform a predetermined work. In this type of tube changer 44, as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 50-34524, the tube changer 44 is provided with a carrier vehicle 43 via a power supply cord 45.
Is electrically connected to the power supply cord 45, and electric power is obtained from the power supply cord 45 to operate the drive mechanism or the pipe replacement mechanism.

Further, the transport vehicle 43 is equipped with a power feeding cord winding device that reels out or winds the power feeding cord 45 according to the movement of the pipe replacement machine 44 when it is separated from the mounting position. In this type of power supply cord winding device, a replacement machine (working machine) is a carrier vehicle.
When traveling in the direction away from 43, the power supply cord 45 is pulled out from the cord reel by the force of the pipe replacement machine 44,
When the vehicle moves to the side of the carrier vehicle 43, the cord reel is positively rotationally driven to wind up the power feeding cord 45. Therefore, if the positive rotation of the cord reel is not performed according to the traveling state of the pipe replacement machine 44, the power feeding cord 45
Power supply cord due to unreasonable tension being applied to the power supply cord 45 or the power supply cord 45 being loosened too much and being run over by the wheels of the replacement machine 44.
45 cutting accidents occur. To eliminate this inconvenience,
Conventionally, for example, as disclosed in JP-A-58-76531 and the like, a signal line is provided between the carrier 43 and the pipe changer 44, and the pipe changer 44 side with respect to the carrier 43 is provided. Suge changer
The traveling direction of 44 is transmitted, and based on the signal, the power feeding cord winding device switches the cord reel between the positive rotation driving state and the cord withdrawing state.

[Problems to be solved by the invention] However, in the method of transmitting the traveling direction of the pipe replacement machine 44 to the transport vehicle 43 using the signal line, the return from the pipe replacement machine 44 due to a trouble such as disconnection of the signal line. If the traveling signal is not transmitted, the power feeding cord 45 is not positively wound up even though the pipe replacement machine 44 is in the returning traveling state, and excessive looseness occurs in the power feeding cord 45 and the pipe replacement is performed. There is a problem that the power supply cord 45 is broken by the machine 44.

The present invention has been made in view of the above problems,
The purpose is to supply the power to the work machine, which allows the traveling state of the work machine to be judged directly on the transport vehicle side, and the drive torque in the winding direction of the cord reel can be switched to the optimum state according to the running state of the work machine It is to provide a cord winding device.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, the vehicle is reciprocated between a working position and a vehicle mounting position while being electrically connected to the vehicle via a power supply cord. In a cord winding device for power supply equipped on a moving carrier equipped with a moving working machine, a driving torque in the cord winding direction is always transmitted to a cord reel when the working machine is separated from the carrier. In addition, a mechanism capable of switching the strength of the drive torque is provided, a detection means for detecting the rotation direction of the cord reel is provided in the transport vehicle, and the strength of the drive torque is changed based on the detection signal of the detection means. A switching means for switching is provided.

[Operation] In the device of the present invention, the drive torque in the cord winding direction is always applied to the cord reel when the working machine is separated from the carrier for work. The drive torque is maintained in a weak state when the work machine is stopped and when the work machine moves away from the transport vehicle, and when the work machine moves to the transport vehicle side, the drive torque is switched to a strong drive torque state. . In the stopped state, the power supply cord is pulled toward the winding side with a weak force, so when the work machine moves from the stopped state to the transport vehicle side, the cord reel is rotated to the winding side by the drive torque and separated from the transport vehicle. When the cord reel is moved in the direction, the cord reel is rotated to the feeding side by the force of the working machine. Then, the rotation direction of the cord reel is detected by the detection means, and the drive torque is switched to the optimum state corresponding to the movement direction of the working machine. Therefore, when the work machine moves away from the carrier, the power supply cord is pulled out with appropriate tension applied as the work machine moves, and when the work machine moves to the carrier side, the work machine The power supply cord is reliably wound up with the movement of the.

[Embodiment] An embodiment embodying the present invention will be described below with reference to FIGS. As shown in FIGS. 1 and 2, a rail 2 is laid on the side of the spinning machine stand 1 in a direction orthogonal to the longitudinal direction of the spinning machine stand 1, and a working machine 3 for carrying out work on the spinning machine stand is mounted to carry out work. A transport vehicle 4 for transporting the working machine 3 is provided at a position corresponding to the spinning machine stand 1 which requires the above-mentioned rails so as to be able to travel on the rail 2. The work machine 3 and the transport vehicle 4 are power supply cords for supplying electric power from the transport vehicle 4 side to a traveling motor of the work machine 3 or a drive motor (not shown) that drives a drive mechanism of the working device. It is electrically connected via 5. The transport vehicle 4 is provided with a power feeding cord winding device 6.

As shown in FIG. 2, in the power feeding cord winding device 6, a rotating shaft 8 is supported between a pair of bearings 7, and the rotation of the motor 9 is transmitted to the center of the rotating shaft 8 via a winding transmission mechanism 10. It is like this. Code reels 11a and 11b are supported on the rotary shaft 8, powder clutches 12a and 12b are provided on the outer sides of the code reels 11a and 11b, and rotation of the rotary shaft 8 is performed via the powder clutches 12a and 12b. It is transmitted to 11b. The excitation state of the powder clutches 12a and 12b is strong or weak 2
It is configured to be switchable in stages, and when the exciting force is strong, the cord reels 11a and 11b can be wound with a strong torque at a speed almost equal to the traveling speed of the working machine 3, and when the exciting force is weak, the power is supplied. A weak torque that absorbs the slack of the cord 5 acts on the cord reels 11a and 11b. Four dogs 13a and 13b are provided on the outer surfaces of the flanges of the cord reels 11a and 11b, respectively, with a phase difference of 90 degrees. Further, a first sensor S1 and a second sensor S2 for detecting the dogs 13a, 13b are arranged at predetermined positions corresponding to the passage loci of the dogs 13a, 13b of the cord reels 11a, 11b. Code reels 11a, 11 by dogs 13a, 13b and both sensors S1, S2
A detection means for detecting the rotation direction of b is configured.
Further, the output signals of both the sensors S1 and S2 are input to the transport vehicle 4, and the rotation directions of the cord reels 11a and 11b are determined based on the signals, and the powder clutches 12a and 12b are determined based on the determination results. On the other hand, there is provided a control device 14 which outputs a strong / weak command signal in an excited state. Powder clutch 12
The a, 12b and the control device 14 constitute a switching means for switching the strength of the drive torque for the cord reels 11a, 11b.

Next, the operation of the device configured as described above will be described. After the work vehicle 3 moves on the rail 2 to a position corresponding to the spinning machine stand 1 that requires work and stops at a predetermined position, the drive of the motor 9 is started and the powder clutches 12a, 12b. Is turned on in a weakly excited state, and then the working machine 3 starts traveling toward the spinning machine base 1 side. The control device 14 controls the cord reel 1 based on the output signals of both sensors S1 and S2.
When 1a and 11b were rotated in the winding direction, a strong excitation command was output to the powder clutches 12a and 12b, and the cord reels 11a and 11b were stopped or rotated in the feeding direction of the power supply cord 5. At this time, a weak excitation command is output to the powder clutches 12a and 12b.

When the working machine 3 travels in the direction away from the transport vehicle 4 from the stopped state, the power feeding cord 5 is pulled out from the cord reels 11a and 11b as the working machine 3 travels. Code reel 11 at this time
a and 11b are rotated in the feeding direction (clockwise direction in FIG. 1), and the first sensor S1 and the second sensor S2 are sequentially moved to the dogs 13a and 13b.
Detecting b, both sensors S1 and S2 output detection signals A and B to the control device 14 as shown in FIG. 4 (a). Work machine 3
Is traveling at a predetermined speed, so within a predetermined time t1, FIG.
When the dog detection signals are input to the control device 14 at predetermined intervals in the order of the first sensor S1 and the second sensor S2, the control device 14 moves in the direction in which the working machine 3 moves away from the transport vehicle 4. Powder clutch 12a, 12b
A weak excitation command is output to and the weak excitation state is maintained.

The work machine 3 intermittently stops at a predetermined work position to perform work, and restarts traveling after the work is completed. When the working machine 3 stops, the feeding of the power supply cord 5 is stopped, and the control device 14
The detection signal to the sensor is as shown in FIG. 4 (c) or FIG. 4 (d), and the control device 14 controls both sensors S1, S within a predetermined time t1.
The detection signal from 2 is not input, and the control device 14 operates the work machine 3
Determines that the vehicle has stopped running. And power supply cord 5
Powder clutch 12a, 12 for a certain period of time to absorb looseness
A strong excitation command signal is output to b and the cord reels 11a, 11b
After the drive torque for is kept strong, a command signal for weak excitation is output and the drive torque is kept weak. The power supply cord 5 does not loosen when the work machine 3 is stopped from the state of moving away from the transport vehicle 4, but the power supply cord 5 is stopped when it is stopped from the state of moving to the transport vehicle 4 side. Since there is a case where the powder clutch 5 is loosened, the powder clutches 12a and 12b are temporarily held in the strongly excited state because the looseness of the power feeding cord 5 is absorbed as described above.

On the other hand, when the working machine 3 starts traveling from the stopped state to the transport vehicle 4 side, the power supply cord 5 is loosened and the cord reel 11
The a and 11b are rotated in the direction to absorb the slack, that is, in the counterclockwise direction in FIG. At this time, first the second sensor S2 is the dog 13
Since the detection signal B is output by detecting a and 13b, and the detection signal A is output by the first sensor S1 subsequently detecting the dogs 13a and 13b, the control device 14 is shown in FIG. A signal as shown is input. When this signal is input within the predetermined time t1, the control device 14 determines that the working machine 3 has started traveling in the direction approaching the transport vehicle 4, and sends a strong excitation command signal to the powder clutches 12a and 12b. Output, powder clutch 12a,
12b is kept in a strongly excited state. As a result, the cord reels 11a, 11b are driven so as to wind up the power feeding cord 5 at a speed substantially equal to the traveling speed of the working machine 3, and even when the working machine 3 moves to the transport vehicle 4 side, the power is fed in a loose state. Accidents in which the cord 5 is hit by the wheels of the work machine 3 and cut off are reliably avoided.

When the rotation of the cord reels 11a, 11b is stopped, the dogs 13a, 1b
It may stop in the state where 3b is located between both sensors S1 and S2. When the cord reels 11a and 11b start rotating in this state as the working machine 3 travels, when the working machine 3 starts traveling in a direction away from the transport vehicle 4, the control device 14 is shown in FIG. 4) is input, and when traveling to the side of the transport vehicle 4 is started, the signal of FIG. 4 (f) is input to the control device 14. Therefore, if the rotation direction of the cord reels 11a and 11b is determined in the same manner as above only in the output order of the detection signals A and B from both sensors S1 and S2, an incorrect determination is made, but within the predetermined time t1 the rotation direction Since a signal for accurately determining is input to the control device 14, there is no problem.

The present invention is not limited to the above embodiment,
For example, as shown in FIG. 5, one sensor S is provided, and two consecutive dogs 15 and a single dog 15 are arranged on the cord reels 11a and 11b at a predetermined interval. Good. In this case, the sensor S outputs the detection signal C shown in FIGS. 6 (a) and 6 (b) as a signal corresponding to the signals shown in FIGS. 4 (a) and 4 (b). The rotation directions of 11a and 11b are accurately determined. Also, the number of dogs can be changed as needed, or the code reel
Instead of providing dogs on 11a and 11b, a through hole is formed and a photoelectric sensor is used for the sensor, or the cord reel 11
A rotary encoder may be provided as a detection means for detecting the rotation directions of a and 11b. Further, when it is determined that the working machine 3 has stopped traveling, a weak excitation command signal is output to the powder clutches 12a and 12b for a predetermined time without outputting a strong excitation command signal in order to absorb the looseness of the power supply cord 5. You may do it. Further, instead of the powder clutch, another fluid clutch is used, and the driving torque is switched between strong and weak by changing the rotation speed of the motor 9, or each cord reel 11a, 11b is driven by an independent motor 9. It is also possible to adopt a configuration in which each is driven by.

[Advantage of the Invention] As described in detail above, according to the present invention, the traveling state of the working machine is directly detected on the transport vehicle side to drive the power supply cord winding device, so that the work is performed via the signal line. The reliability is higher than that of the conventional device that transmits the traveling state of the working machine from the machine to the carrier, and the life of the power supply cord is long because the power supply cord is pulled out and wound in the proper tension state at all times. extend.

[Brief description of drawings]

1 to 4 show an embodiment embodying the present invention. FIG. 1 is a schematic side view showing a relationship between a working machine and a carrier, and FIG. 2 is a cord winding device for power feeding. Schematic plan view, third
FIG. 4 is a flow chart for explaining the operation, FIG.
(F) is a diagram showing an output signal from the sensor, FIG. 5 is a schematic side view of a main part of a modified example, and FIGS. 6 (a) and 6 (b) are FIGS. 4 (a) and 4 (b) in the modified example. 7 is a schematic plan view of a conventional device. Working machine 3, transport vehicle 4, power supply cord 5, motor 9, cord reels 11a, 11b, powder clutches 12a, 12b constituting drive torque intensity switching means, control device 14, dogs 13a, 13b constituting detection means. , 15, 1st sensor S1, 2nd sensor
S2, sensor S, predetermined time t1.

Claims (1)

[Scope of utility model registration request] 1. A transport vehicle equipped with a working machine that reciprocates between a work position and a transport vehicle mounting position while being electrically connected to the transport vehicle via a power supply cord, and equipped to a transport vehicle. In the power feeding cord winding device, when the working machine is away from the transport vehicle, the cord reel is always provided with a mechanism capable of transmitting the driving torque in the cord winding direction and switching the driving torque between strong and weak. A winding device for feeding power to a working machine, which is provided with a detection means for detecting the rotation direction of the vehicle based on the rotation of the vehicle, and a switching means for switching the strength of the drive torque based on the detection signal of the detection means. .