JP3540342B2 - Cableway braking device - Google Patents

Description

[0001]
[Industrial applications]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake device for a hoist that hoists a carriage on a cableway.
[0002]
[Prior art]
The cableway brakes include a hydraulic release brake that acts on a brake disk that rotates together with the main motor, and a hydraulic release pulley brake that acts on a pulley wound around a cable. Each of the hydraulic release brakes has a structure in which a brake shoe is pressed by utilizing the elastic restoring force of a compressed spring to obtain a braking force. In addition, the hydraulic release brake and the hydraulic release pulley brake are equipped with hydraulic cylinders in series or in parallel with each spring, and supply hydraulic oil from a hydraulic unit separately provided to each hydraulic cylinder. The brake action of the hydraulic release brake and the hydraulic release pulley brake is released by pushing the brake shoe open and away from the brake disc and pulley against the elastic restoring force of the brake.
[0003]
FIG. 12 shows a hydraulic cylinder 145 mounted on a hydraulic release brake 144 acting on a brake disk 149 of the conventional driving device 140 shown in FIG. 11 and a hydraulic cylinder mounted on a hydraulic release pulley brake 146 acting on a pulley 143. FIG. 13 is a hydraulic circuit diagram of a conventional hydraulic unit 150 for supplying pressurized oil to 147.
[0004]
First, when a cableway operation is started, when an operator presses a reset push button (not shown) on the operation panel, the solenoid 164a of the solenoid valve 164 is energized to return the solenoid valve 164 to the "closed" state. Block the passage of pressure oil through circuit 170. At the same time, the electric motor M2 for driving the hydraulic pump 160 is started, and the hydraulic oil is sucked from the hydraulic tank 165 through the strainer 161 and discharged toward the filter 159. When the pressure oil that has passed through the filter 159 and passes through the check valve 156c and reaches the branch point L, the pressure oil is supplied to the accumulator 158 to accumulate the oil at a predetermined pressure. Next, when reaching the branch point M from the branch point L, it branches to the pressure switch 157, the hydraulic release brake circuit 167 and the hydraulic release pulley brake circuit 168 to supply pressure oil to each. As for the hydraulic release brake circuit 167, the passage of the hydraulic oil is stopped by the solenoid valve 162 in the "closed" state, so that the hydraulic oil is not supplied to the hydraulic cylinder 145 side of the hydraulic release brake 144. Next, the pressure oil branched to the hydraulic release pulley brake circuit 168 reaches the branch point Q through the check valve 156b. Here, branching to the pressure gauge 151b, the pressure gauge 151b indicates the pressure of the hydraulic release pulley brake circuit 168.
[0005]
Next, the pressure oil that has reached the branch point R from the branch point Q passes through the stop valve 153d in the "open" state and the throttle valve 155b arranged on the return circuit 170, and energizes the solenoid 164a. Activate and stop the passage of pressure oil with the solenoid valve 164 in the "closed" state. The other circuit reaches the stop valve 154b in the "closed" state. Next, the pressure oil that has reached the branch point S from the branch point R is supplied to the relief valve 152 b and the hydraulic cylinder 147 of the hydraulic release pulley brake 146. Among them, the relief valve 152b operates when the pressure of the hydraulic release pulley brake circuit 168 rises abnormally, returns the hydraulic oil to the hydraulic tank 165, and reduces the pressure to protect the hydraulic equipment.
[0006]
When hydraulic oil is supplied from the branch point S of the hydraulic unit 150 to the hydraulic cylinder 147 of the hydraulic release pulley brake 146 by a piping member (not shown), the hydraulic release pulley brake 146 is opened, and the braking operation is performed. And ready to start operation of the transporter.
[0007]
Next, when the operator presses an operation push button (not shown) on the operation panel, the solenoid 162a of the solenoid valve 162 and the solenoid 163a of the solenoid valve 163 are energized. As a result, the solenoid valve 162 is in the "open" state, and the pressure oil that has passed through the solenoid valve 162 further reaches the branch point N through the check valve 156a. From the branch point N, it passes through the hydraulic release brake circuit 167 and the "open" stop valve 153a to reach the pressure gauge 151a, and the pressure gauge 151a indicates the pressure of the hydraulic release brake circuit 167. Further, the pressure oil that has reached the branch point O from the branch point N branches in three directions, one of which reaches the stop valve 154a in the “closed” state. Further, the pressure oil branched to the second return circuit 169 passes through the stop valve 153c in the "open" state and the throttle valve 155a, energizes the solenoid 163a, and stops at the solenoid valve 163 in the "closed" state. Next, the pressure oil reaching the branch point P from the three branch points O acts on the relief valve 152a and the hydraulic cylinder 145 of the hydraulic release brake 144. The relief valve 152a protects hydraulic equipment by returning hydraulic oil to the hydraulic tank 165 when the pressure of the hydraulic release brake circuit 167 rises abnormally. In addition, the hydraulic oil that has passed through the piping member (not shown) acts on the hydraulic cylinder 145 of the hydraulic release brake 144 to change the hydraulic release brake 144 from the braking state to the open state. At this time, the main motor 141 for rotationally driving the pulley 143 shown in FIG. 11 is also activated at the same time, and the cable 148 starts to circulate and the carriage is operated.
[0008]
Next, a passenger mistakes the getting on / off operation of the carrier and fails to get on the carrier or fails to get off the carrier and presses a stop push button, or an abnormality is detected in the mechanical device and a security circuit (shown in the drawing). Does not work), the power supply to the main motor 141 driving the pulley 143 shown in FIG. 11 is cut off, and at the same time, the hydraulic unit 150 stops the electric motor M2 for driving the hydraulic pump 160. Then, the supply of the pressure oil is interrupted, and the power supply to the solenoid 162a of the solenoid valve 162, the solenoid 163a of the solenoid valve 163, and the solenoid 164a of the solenoid valve 164 is cut off. 164 is in the "open" state. Therefore, the supply of the pressure oil to the hydraulic release brake circuit 167 is stopped at the solenoid valve 162. At the same time, the pressure oil stored in the hydraulic cylinder 145 of the hydraulic release brake 144 shown in FIG. 2 passes through the solenoid valve 163 in the “open” state due to the elastic restoring force of the spring 36 and returns to the return circuit 169. To the hydraulic tank 165. At this time, a predetermined deceleration is achieved by adjusting the braking time of the hydraulic pressure release brake 144 according to the throttle amount of the throttle valve 155a arranged on the return circuit 169.
[0009]
Similarly, the pressure oil supplied to the hydraulic cylinder 147 of the hydraulic release pulley brake 146 shown in FIG. 5 returns through the solenoid valve 164 in the "open" state due to the elastic restoring force of the springs 73a and 73b. It is discharged from the circuit 170 to the hydraulic tank 165. At this time, the braking time of the hydraulic release pulley brake 146 is adjusted in the same manner as the hydraulic release brake 144 according to the restriction amount of the restrictor valve 155b arranged on the return circuit 170 so that a predetermined deceleration is achieved.
[0010]
[Problems to be solved by the invention]
FIG. 12 shows a braking curve of the transporter when the hydraulic release brake 144 and the hydraulic release pulley brake 146 are operated at the time of stop by the operation of the hydraulic unit 150 described above. In the braking curve 133 shown by the solid line with respect to the reference setting braking curve 134 shown by the two-dot chain line, an electric stop signal is output at time tx, and the electromagnetic valve of the hydraulic unit 150 shown in FIG. The power supply to the solenoids 162a, 163a and 164a of the solenoid valve 162, the solenoid valve 163 and the solenoid valve 164 is stopped. However, the operation time of the solenoid valves 162, 163, 164 and the return time of the pressure oil due to the pipe resistance overlap, and the hydraulic cylinder 145 of the hydraulic release brake 144 shown in FIGS. The pressure oil of the hydraulic cylinder 147 of the pulley brake 146 returns to the hydraulic tank 165, and the brake shoes 27, 27 of the hydraulic release brake 144 contact the brake disc 149, and the brake shoes 62a, 62b of the hydraulic release pulley brake 146. It is at the time ty that the brake is actually brought into contact with the disk surfaces 143a and 143b of the pulley 143 at the time ty. That is, the time from the time tx at which the stop signal was output to the time ty at which the braking is started is the idle running time. Therefore, as shown in the drawing, the carriage is not braked from the point X at time tx to the point Y at time ty on the braking curve 133.
[0011]
Next, the braking curve 133 from the point Y to the point Z from the time ty at which the braking is started to the time tz at which the transporter stops is determined between the brake shoes 27, 27 of the hydraulic release brake 144 and the brake disk 149, and the hydraulic pressure. Since the friction coefficient generated between the brake shoes 62a and 62b of the open pulley brake 146 and the disk surfaces 143a and 143b of the pulley 143 changes due to a change in relative speed, a curved braking curve results. Therefore, there is a large difference between the maximum deceleration of the set braking curve 134 from the output of the stop signal to the stop of the transporter and the actual deceleration curve 133, whereby the transporter swings largely in the traveling direction during braking. However, there was some fear of the passengers riding on the carriages along the cableway, and there was also a risk that the passengers would fall from the carriages.
[0012]
The present invention reduces the run-out time until the start of braking and decelerates at a constant deceleration as much as possible to reduce the swing of the transporter and smoothly stop it. And to provide a cableway braking device having the same reliability.
[0013]
[Means to solve the problem]
In response to this object, a cableway braking device according to the present invention is a cableway braking device in which the operating speed of a carriage can be changed by changing the rotation speed of a main motor that drives a pulley around which a cable is wound by a control device. And The control device includes a speed command amplifier that sets a braking curve, and a speed relay that operates at a set speed. And the braking device is A hydraulic release brake, Throttle valve and Equipped with a solenoid valve operated by the signal of the speed relay Has at least two selectable pressure oil return circuits A hydraulic unit for operating the hydraulic release brake. Equipment When the carrier is decelerated to a predetermined speed by lowering the rotation speed of the main motor by a deceleration command signal of the speed command amplifier from a normal operation speed, the speed relay is activated to interrupt the deceleration command signal. At the same time, the brake is released by the hydraulic release brake until the transporter stops. And when the operating speed when a set time has elapsed from the start of the braking curve is greater than the set speed, braking is performed by the hydraulic release brake, and selection of the braking time of the hydraulic release brake is selected. Is performed by selecting the return circuit of the pressure oil. To do.
[0014]
[Action]
A speed command amplifier and a speed relay are provided in the control circuit of the main motor that rotates the pulley around which the rope is wound, and a braking curve is set in advance in the speed command amplifier. When the transporter stops, first, the speed command amplifier outputs a deceleration command signal according to a braking curve to change the thyristor control signal, thereby reducing the rotation of the main motor and braking to the low speed just before the stop. Next, the speed relay detects that the rotation of the main motor has been decelerated to a predetermined speed, cuts off the circuit of the deceleration command signal, and stops supplying power to the main motor. At the same time, by shutting off the power to the solenoid of the solenoid valve provided in the hydraulic unit, the hydraulic release brake acting on the brake disk rotating together with the output shaft of the main motor using the elastic restoring force of the spring, To release the hydraulic release pulley brake acting on the wound pulley, the hydraulic oil supplied to the hydraulic cylinder is discharged to the hydraulic unit, and the hydraulic release brake and the hydraulic release pulley brake have elasticity of the spring. The operation of the carriage is stopped by mechanically stopping the rotation of the main motor and the pulley by performing a braking operation by the restoring force. In this way, by using both the electric braking and the mechanical braking, both smoothness and reliability of the braking operation are achieved.
[0015]
【Example】
Hereinafter, a detailed embodiment of the present invention will be described with reference to the drawings. The prime mover 1, the hydraulic release brake 20 (144), and the hydraulic release pulley brake 60 (146) have the same structure as in the prior art, so the same numbers are used. FIG. 1 is a side view of a driving apparatus 1 using the cableway braking device of the present invention. The front leg 4 and the rear leg 5 are erected at the stop 12 at an interval in the traveling direction of the transporter. Next, the driving frame 3 is horizontally mounted between the front leg 4 and the rear leg 5. Further, a reduction gear 10 is arranged on the right side of the cableway on the right side in the drawing on the center line in the traveling direction of the carrier on the driving frame 3, and a main motor 6 fixed on the electric motor frame 8 is arranged on the left rear in the drawing.
[0016]
Next, the output shaft 6a of the main motor 6 and the input shaft 10a of the speed reducer 10 arranged on a concentric line in the cableway direction are connected by the universal joint 9. Further, a brake disc 7 is coaxially fixed to the output shaft 6a of the electric motor 6. Next, a large-diameter pulley 11 is horizontally fitted and fixed to an output shaft 10b which penetrates the driving frame 3 of the reduction gear 10 downward and protrudes. The pulling machine bites the pulley 11 and winds up the rope 2 from which the carriage is suspended. Thus, when the main motor 6 rotates, it is transmitted to the reduction gear 10 by the universal joint 9 and the rotation is reduced by the reduction gear 10. At the same time, the rotation axis changes direction from the horizontal direction to the vertical direction, and the pulley 11 around which the cable 2 is wound rotates at the operating speed of the transporter.
[0017]
Next, the hydraulic release brake 20 according to the present invention is fixed to the output shaft 6a of the main motor 6, and is disposed below the brake disk 7 which rotates at high speed. The driving frame 3 also includes a hydraulic release pulley brake 60 that acts on the pulley 11 that is wound around the rope 2 and rotates at the operating speed of the transporter.
[0018]
FIG. 2 is a partially sectional plan view showing a braking state of the hydraulic release brake 20 acting on the brake disk 7, and FIG. 3 is a partially sectional plan view showing the released state of the hydraulic release brake 20. FIG. One end of a long arm 23 is pivotally attached to the base 21 by a hinge pin 22a, and similarly, one end of a long arm 24 is also pivotally attached by a hinge pin 22b. Next, the brackets 26, 26 to which the brake shoes 27, 27 are attached by the hinge pins 25, 25 are respectively opposed to the hinge pins 22a, 22b slightly closer to the hinge pins 22a, 22b than the centers of the arms 23, 24, and are positioned horizontally. Pivot pivotally. Further, in the arm 23, one end of a tie plate 28 is pivotally connected with a hinge pin 29 on the side opposite to the side pivotally connected with the hinge pin 22 a.
[0019]
On the other hand, on the arm 24 side, the lever 33 is pivotally connected with the hinge pin 31, and the other end of the tie plate 28 which is pivotally connected to the arm 23 is pivotally connected to the lever 33 with the hinge pin 30. In this way, the arm 23 and the arm 24 swing together in conjunction with the tie plate 28 and the lever 33. The end of a rod 34 is pivotally connected to the lever 33 by a hinge pin 32 on the side opposite to the side on which the tie plate 28 is pivoted. Further, a cylindrical bowl-shaped receiving metal 37 is mounted concentrically on the side opposite to the side pivoted by the hinge pin 32. Further, the rod 34 and the receiving member 37 are provided inside the spring case 35 so as to be slidable in the axial direction, and a spring 36 is mounted between the spring case 35 and the receiving member 37 so as to surround the rod 34.
[0020]
A hydraulic cylinder 38 is fixed to the end surface of the spring case 35 opposite to the side from which the rod 34 extends, coaxially with the rod 34, and at this time, the end surface of the piston rod 38 a is in contact with the end surface of the rod 34. Make contact. Further, the hydraulic cylinder 38 has a pin 41 on an end opposite to the side from which the piston rod 38a extends, and is pivotally connected to the adjustment rod 42 by a pin 41 so as to be swingable in the horizontal direction. The adjustment rod 42 penetrates a rod support 44 fixedly extended from the base 21 side, and is fixedly supported by nuts 43, 43 and the nuts 43, 43.
[0021]
Thus, as shown in FIG. 2, when the hydraulic release brake 20 is in the braking state, the spring case 35, the hydraulic cylinder 38, and the adjustment rod 42 are arranged substantially in series on a straight line parallel to the arm 24. Further, as will be described later in detail, the rod 34 moves the piston rod 38a in the direction of the arrow 56 through the receiving metal 37 abutting on one end of the spring 36 by the elastic restoring force of the spring 36 which is compressed and housed in the spring case 35. As a result, the piston rod 38a is pushed into the hydraulic cylinder 38. At this time, the pressure oil in the hydraulic cylinder 38 is discharged from the oil supply port 40 to the hydraulic unit 90 through a piping member (not shown). When the rod 34 slides in the direction of the arrow 56, the lever 33 pivots in the direction of the arrow 55 around the hinge pin 31 pivotally attached to the arm 24, and the tie plate 28 pivotally attached to the lever 33 also moves the hinge pin 30. The pivoted end turns around the hinge pin 31 in the direction of arrow 55. By the operation of the tie plate 28, the arm 23 also swings around the hinge pin 22a in the direction of the arrow 52, and the bracket 26 pivotally connected to the center of the arm 23 with the hinge pin 25 also swings in the direction of the arrow 51, and the bracket 26 The brake shoe 27 adhered to the brake disk 7 contacts the brake disk 7. Next, the lever 33 pivots in the direction of arrow 55 about the hinge pin 30 and the arm 24 swings in the direction of arrow 54 about the hinge pin 22b, so that the bracket 26 and the brake shoe adhered to the bracket 26 are pivoted. 27 swings in the direction of arrow 52 in the same manner and comes into contact with the brake disk 7. Thus, the braking operation is performed by engaging the brake disk 7 between the two brake shoes 27, 27.
[0022]
Next, when the hydraulic oil is supplied from the oil supply port 40 to the hydraulic cylinder 38 through the piping member (not shown) from the hydraulic unit 90 when the open state shown in FIG. In opposition, the piston rod 38a extends in the direction of the arrow 50, and at the same time, the rod 34 in contact with the piston rod 38a is also guided by the spring case 35 and slides in the direction of the arrow 50. The spring 36 is compressed in the spring case 35 by the receiving metal 37 attached to the rod 34.
[0023]
When the pressure oil is supplied to the hydraulic cylinder 38 and the rod 34 is slid in the direction of arrow 50 in this manner, the portion pivotally connected to the lever 33 and the lever 33 of the tie plate 28 with the hinge pin 30 turns in the direction of arrow 49. At the same time, the arm 23 swings in the direction of arrow 47 around the hinge pin 22a by the tie plate 28 pivoted by the hinge pin 29, and the bracket 26 to which the brake shoe 27 pivotally attached to the substantially central position of the arm 23 also points. The brake shoe 27 moves away from the brake disk 7 by swinging in the 45 direction. At the same time, the portion pivotally connected to the lever 33 of the tie plate 28 with the hinge pin 30 pivots about the hinge pin 29 in the direction of arrow 48, and the lever 33 pivots about the hinge pin 30 pivotally mounted on the arm 24 in the direction of arrow 49. The arm 24 swings in the direction of the arrow 39 around the hinge pin 22b by the swinging operation, and the bracket 26 pivotally connected to the arm 24 by the hinge pin 25 at substantially the center position also swings in the direction of the arrow 46, The brake shoe 27 attached to the bracket 26 separates from the brake disk 7. That is, when the hydraulic oil release brake 20 discharges the hydraulic oil from the hydraulic cylinder 38, the hydraulic oil release brake 20 enters the braking state shown in FIG. 2 by the elastic restoring force of the spring 36, and conversely, when the hydraulic oil is supplied to the hydraulic cylinder 38, the spring 36 Are compressed against the elastic restoring force to be in the open state shown in FIG.
[0024]
Next, FIG. 4 shows a braking state of the hydraulic release pulley brake 60 acting on the pulley 11 shown in FIG. 1, and FIG. 5 shows an open state of the hydraulic release pulley brake 60. An arm 61a and an arm 61b each having a key shape in a side view are pivotally attached to a fixed shaft 63 provided on the driving frame 3 side so as to be vertically symmetrical. The brake shoe 62a and the brake shoe 62b are attached to the arms 61a and 61b at positions facing each other. Next, a pin 65a, 65a is fixedly extended to both sides of the arm 61a and the arm 61b on the opposite side of the right side in the drawing with respect to the side on which the brake shoe 62a and the brake shoe 62b are stuck. Similarly, the pins 66a and 66a are pivotally attached to the arms 61a and 61b so that the pins 66a and 66a are linearly opposed to each other. Is mounted with a hydraulic cylinder 64. The receiving block 66 has a positioning bolt 69 extending upward from a support 68 fixedly extended from the driving frame 3 side, and is pivotally attached to the arm 61a when it is opened as shown in FIG. The lower surface 66 is brought into contact with the lower surface. Next, an adjustment bolt 67 is passed through the receiving block 65 pivotally attached to the arm 61b from above, and is fixed at a position where it contacts the upper end of the piston rod 64a of the hydraulic cylinder 64.
[0025]
Further, on the arm 61b located on the right side of the hydraulic cylinder 64 mounted between the receiving block 65 and the receiving block 66 as described above, a spring receiving block 71 having pins 71a, 71a extending to both sides is provided. Similarly, a spring receiving block 72 having pins 72a, 72a extending to both sides is also pivotally attached to the lower arm 61a at the pins 72a, 72a.
[0026]
In this manner, the spring receiving block 71 and the spring receiving block 72 pivotally attached to the arm 61a and the arm 61b vertically pass through the rod 70 having the threaded portions 70a, 70a formed at both ends thereof. After inserting the receiving washer 74 into the spring receiving block 74 and the receiving washer 74, the spring 73a is sandwiched between the spring receiving block 71 and the receiving washer 74, and compressed by the adjusting nut 76 to generate a predetermined elastic restoring force. Then, the lock nut 77 is used to prevent loosening.
[0027]
Similarly, the spring 73b is also inserted from the lower end of the rod 70 into the spring receiving block 72, which is pivotally attached to the arm 61a and located on the lower side. The adjustment nut 76 is tightened to the portion 70a to compress the spring 73b to a position where a predetermined elastic restoring force is generated, and the lock nut 77 prevents the adjustment nut 76 from loosening.
[0028]
FIG. 6 shows a hydraulic circuit of a hydraulic unit 90 for supplying hydraulic oil to the hydraulic cylinder 38 of the hydraulic release brake 20 and the hydraulic cylinder 64 of the hydraulic release pulley brake 60. The hydraulic tank 106 is filled with hydraulic oil in an amount corresponding to the discharge amount of the hydraulic pump 100. First, the strainer 101, the hydraulic pump 100, the filter 99, and the check valve 96b are arranged on the supply circuit 109 from the hydraulic tank 106 side. At the branch point A, the circuit is divided into the accumulator 98 and supplies the pressure oil to the accumulator 98. Next, at the branch point B, the electromagnetic valve 102, the pressure switch 97, and the hydraulic release pulley brake circuit 108 branch in three directions. A check valve 96a is provided at the end of the solenoid valve 102 of the one circuit, and reaches a branch point C. Next, at a branch point C, a branch is made to the hydraulic pressure release brake circuit 107 and the pressure gauge 91a, and a stop valve 93a is interposed between the pressure gauge 91a and the branch point C.
[0029]
Next, at a branch point D on the hydraulic release brake circuit 107, the circuit branches to a circuit toward the branch point E, a circuit toward the branch point J, and a return circuit 110. In the return circuit 110, a check valve 93c, a throttle valve 95a, and a solenoid valve 103 are arranged from the branch point D toward the hydraulic tank 106 to reach the branch point F. At the branch point F, the hydraulic oil that has passed through the solenoid valve 104 from the later-described branch point E joins. In the circuit branched toward the hydraulic cylinder 38 in the opposite direction, one reaches the relief valve 92a at the branch point J, and the other reaches the hydraulic cylinder 38 of the hydraulic release brake 20 by a piping member (not shown). Reach Next, from the branch point D to the branch point E, one of the circuits branched at the branch point E has a throttle valve 95b and a solenoid valve 104, and the other has reached the branch point F and has a return circuit 110. Join.
[0030]
Next, the hydraulic release pulley brake circuit 108 branched from the branch point B of the supply circuit 109 has a check valve 96c and reaches the branch point G. A stop valve 93b and a pressure gauge 91b are arranged in one circuit branched from the branch point G. Further, the other circuit branched from the branch point G reaches the branch point H. Further, one of the circuits divided at the branch point H reaches the stop valve 94b. Further, the other circuit reaches the branch point I from the branch point H. At the branch point I, the circuit is divided into a circuit toward the hydraulic cylinder 64 of the hydraulic release pulley brake 60 and a return circuit 111. Among them, a stop valve 93d, a throttle valve 95c, and a solenoid valve 105 are arranged in order in the return circuit 111 toward the hydraulic tank 106. The circuit divided toward the hydraulic cylinder 64 reaches the branch point K, and a relief valve 92b is arranged in one of the circuits divided at the branch point K. The other circuit is connected to a hydraulic cylinder 64 of a hydraulic release pulley brake 60 by a piping member (not shown).
[0031]
Next, the operation of the hydraulic unit 90 configured as described above will be described below. First, when starting the operation of the transporter, an attendant presses a reset push button (not shown) of the operation panel in the operation room of the stop. With this operation, the electric motor M <b> 1 connected to the hydraulic pump 100 starts up, the hydraulic pump 100 rotates, and hydraulic oil is sucked from the hydraulic tank 106. At this time, sludge or the like mixed in the hydraulic oil is removed by the strainer 101 connected to the end of the supply circuit 109. Next, the hydraulic oil discharged from the hydraulic pump 100 passes through a filter 99 to filter fine dust, and passes through the next check valve 96b. Thus, the hydraulic oil that has once passed through the check valve 95b is prevented from flowing back to the hydraulic pump 100, thereby protecting the hydraulic pump 100. Next, at the branch point A, the operating oil is supplied to the accumulator 98 until a constant pressure is reached. Further, when reaching the branch point B, the circuit is divided into three directions.
[0032]
Among them, the first circuit reaches the pressure switch 97, and when the hydraulic oil reaches a predetermined pressure, the pressure switch 97 operates to stop the rotation of the electric motor M1 connected to the hydraulic pump 100. Next, the second circuit stops the passage of the hydraulic oil to the branch point C by the solenoid valve 102 in the “closed” state that is not operating. Accordingly, no hydraulic oil is supplied to the hydraulic release brake circuit 107, so that the hydraulic release brake 20 remains in the braking state shown in FIG. Next, the pressure oil branched to the third hydraulic release pulley brake circuit 108 passes through the check valve 96c, reaches the branch point G, and branches in two directions. One of them passes through the "open" stop valve 93b and reaches the pressure gauge 91b to indicate the pressure acting on the hydraulic release pulley brake circuit 108. Next, when reaching the branch point H, one of the circuits reaches the stop valve 94b in the "closed" state and stops discharging to the hydraulic tank 106.
[0033]
Further, the hydraulic oil reaching the branch point I from the branch point H branches to the hydraulic cylinder 64 side and the return circuit 111. At this time, when the reset push button (not shown) is pressed, the solenoid valve 105 arranged on the return circuit 111 is energized to the solenoid 105a to be in the "closed" state, and the hydraulic oil is supplied to the hydraulic tank 106. A pressure is generated in the hydraulic release pulley brake circuit 108 by the rotation of the hydraulic pump 100 without returning, and pressure oil is supplied to the hydraulic cylinder 64 of the hydraulic release pulley brake 60 from the branch point I to the branch point K. At this time, the pressure oil separated from the branch point K further acts on the relief valve 92b.
[0034]
In this way, when the hydraulic oil is supplied from the hydraulic unit 90 to the hydraulic release pulley brake 60 and the piston rod 64a of the hydraulic cylinder 64 extends in the direction of the arrow 78 as shown in FIG. As the piston rod 64a continues to extend, the receiving block 65 compresses the spring 73a, and the arm 61b pivots about the fixed shaft 63 in the direction of the arrow 81 when the piston rod 64a continues to extend. The brake shoe 62b adhered to 61b separates from the disk surface 11b of the pulley 11. Next, due to the reaction, the hydraulic cylinder 64 moves in the direction of arrow 79, the receiving block 72 compresses the spring 73b, and the arm 61a pivots about the fixed shaft 63 in the direction of arrow 80, and adheres to the arm 61a. The released brake shoe 62a separates from the disk surface 11a of the pulley 11, and the hydraulic release pulley brake 60 enters the open state shown in FIG.
[0035]
That is, when the reset push button (not shown) is pressed, the solenoid 105a of the solenoid valve 105 is energized in the hydraulic unit 90 to bring the solenoid valve 105 into the "closed" state, and at the same time, the electric motor M1 connected to the hydraulic pump 100 is turned on. When the hydraulic pump 100 starts, the hydraulic release pulley brake 60 is brought into the open state shown in FIG. 5 by generating pressure in the hydraulic release pulley brake circuit 108 and supplying hydraulic oil to the hydraulic cylinder 64. . Further, when the extension of the piston rod 64a of the hydraulic cylinder 64 stops and the opening operation of the hydraulic release pulley brake 60 ends, the pressure of the hydraulic release pulley brake circuit 108 increases, and the pressure switch 97 operates. The rotation of the electric motor M1 of the hydraulic pump 100 is stopped, and the supply of the pressure oil is stopped.
[0036]
Next, when an operator presses an operation push button (not shown) to start the operation of the transporter, the solenoid 102 a of the solenoid valve 102 of the hydraulic unit 90 and the solenoid 103 a of the solenoid valve 103 are energized, and the solenoid valve is turned on. 102 is set to the “open” state, the electromagnetic valve 103 is set to the “closed” state, and the hydraulic oil is supplied to the hydraulic release brake circuit 107, and the hydraulic oil is also supplied to the hydraulic cylinder 38 of the hydraulic release brake 20. At this time, since the pressure of the hydraulic release brake circuit 107 temporarily decreases, the pressure switch 97 is operated, and the hydraulic pump 100 rotates again to supply pressure oil to the hydraulic release brake circuit 107 to increase the pressure. When the pressure reaches the set pressure, the pressure switch 97 operates to stop the electric motor M1 and stop the supply of the pressure oil from the hydraulic pump 100.
[0037]
Thus, as shown in FIG. 3, when pressure oil is supplied to the hydraulic cylinder 38 of the hydraulic release brake 20, the piston rod 38a of the hydraulic cylinder 38 slides in the direction of the arrow 50 together with the rod 34 abutting on the piston rod 38a. Move. With this operation, the lever 33 connected to the rod 34 by the hinge pin 32 also pivots about the hinge pin 31 in the direction of the arrow 49, and the tie plate 28 connected to the lever 33 by the hinge pin 30 also turns to the arrow about the hinge pin 29. The arm 23 to which the tie plate 28 is pivoted is swung in the direction of arrow 47 around the hinge pin 22a pivotally attached to the base 21 by the reaction. Next, when the swing operation of the arm 23 is stopped, the arm 24 also swings about the hinge pin 22b in the direction of the arrow 39 by the hinge pin 31 to which the lever 33 is similarly pivoted by the reaction force. Accordingly, the bracket 26 pivotally attached to the above-described arm 23a at the substantially central position and having the brake shoe 27 attached thereto also swings in the direction of the arrow 45, and the brake shoe 27 pivotally attached to the almost central position of the arm 24 has been attached. The bracket 26 also swings in the direction of the arrow 46 to move away from the brake disk 7 and the hydraulic release brake 20 is released. At this time, the main motor 6 shown in FIG. 1 also starts at the same time, the speed is reduced by the speed reducer 10, the pulley 11 rotates, the rope 2 circulates, and the operation of the transporter is performed.
[0038]
Next, at the stop 12, a passenger who fails to get into the transporter or fails to get out of the transporter and presses a stop push button (not shown), or an abnormality in the mechanical device. In the following, the operation of the braking device of the present invention when the detection device operates to activate the security circuit and stop the transporter will be described.
[0039]
FIG. 7 shows the main circuit 120 that controls the rotation of the main motor 123 (DCM) for operating the transporter, that is, the operating speed of the transporter. Now, when a stop signal output by the operation of the above-described staff or the safety circuit is input to the speed command amplifier 128 (VRF), the speed command amplifier 128 (VRF) issues a deceleration command according to a preset braking curve. The signal is output to the speed amplifier 127 (SCA). At the same time, the output from the rotary generator 124 (PG) connected to the main motor 123 (DCM) is also output to the speed amplifier 127 (SCA) to calculate the necessary control amount, and the current amplifier 126 (CCA) and the voltage amplifier 125 ( VCA) in order, and further, the control amounts of the current and voltage are determined and output to the gate pulse generator 122 (GPG). Based on this signal, a pulse signal is transmitted from the gate pulse generator 122 (GPG) to the thyristor 121 (THY) to reduce the rotation of the main motor 123 (DCM) according to the braking curve 132 shown in FIG.
[0040]
Next, FIG. 10 illustrates a braking curve by the braking device of the present invention. Now, when the carriage is moving on the cableway at the regular operation speed Va and a stop signal is output at the braking start time ta, the deceleration is started from the point a by the main circuit 120 of the main motor 123 (DCM). Next, when the electric deceleration end time tb is reached and the vehicle decelerates to the point b to reach the deceleration end speed Vb, the speed relay 129a (VR1) is activated, and the control circuit 130 transmits the deceleration command signal of the speed command amplifier 128. Cut off the circuit.
[0041]
Next, when the speed relay 129a (VR1) operates as shown in the control circuit 130 of FIG. 8, the relay SA is turned off, and the relay SB is turned on instead. At the same time, the timer T1 starts counting time. By the operation of the relays SA and SB, as shown in the solenoid valve circuit 131 of FIG. 9, the energization to the solenoid 103a is cut off to open the solenoid valve 103, and the solenoid 104a is energized by energizing the solenoid 104a. To the “open” state. At this time, the electric motor M1 driving the hydraulic pump 100 in the hydraulic circuit diagram shown in FIG. 6 is stopped, and the power supply to the solenoid 102a of the solenoid valve 102 arranged on the supply circuit 109 is cut off to release the hydraulic release brake circuit. The supply of pressurized oil to 107 and the hydraulic release pulley brake circuit 108 is shut off. Further, the pressure oil supplied to the hydraulic cylinder 38 of the hydraulic pressure release brake 20 also passes through the two throttle valves 95a and 95b, and then passes through the "open" solenoid valve 103 and the solenoid valve 104 to return to the return circuit. At a branch point F of 110, they are merged and discharged to the hydraulic tank 106. At this time, the throttle amount of the throttle valve 95b is set smaller than that of the throttle valve 95a. The hydraulic oil supplied from the hydraulic release pulley brake circuit 108 to the hydraulic cylinder 64 of the hydraulic release pulley brake 60 also receives the stop valve 93d and the throttle valve 95c arranged on the return circuit 111 and the solenoid valve in the "open" state. After passing through the cylinder 105 in order, the oil is discharged to the hydraulic tank 106. Thereafter, the timer T1 operates at a set time, turns off the relay SB, cuts off the power supply to the solenoid 104a, and returns the solenoid valve 104 to the "closed" state.
[0042]
As a result, in the hydraulic release brake 20, as shown in FIG. 2, when the pressure oil of the hydraulic cylinder 38 returns to the hydraulic unit 90, the spring 36 compressed in the spring case 35 is moved in the direction of the arrow 56 by the elastic restoring force. Returning, the rod 34 slides in the direction of the arrow 56 by the receiving metal 37 abutting on one end of the spring 36 by this operation. As a result, the lever 33 pivotally connected to the rod 34 by the hinge pin 32 also pivots around the hinge pin 31 in the direction of arrow 55, and the hinge pin 30 pivotally connected to the lever 33 with the tie plate 28 in the same manner as above. The arm 23 pivots about the hinge pin 22a pivotally attached to the base 21 by pivoting in the direction of arrow 55 around the center, and the hinge pin 29 pivotally connecting the tie plate 28 to the arm 23 is pulled in the direction of arrow 53. To swing in the direction of arrow 53. As a result, the bracket 26 pivotally attached to the arm 23 at the substantially central position by the hinge pin 25 also swings in the direction of arrow 51, and the brake shoe 27 attached to the bracket 26 comes into contact with the rotating brake disk 7.
[0043]
When the swinging operation of the arm 23 in the direction of the arrow 53 is completed at this position, the lever 33 is then moved to the arm 24 around the hinge pin 30 on which the tie plate 28 is pivoted. By pivoting in the direction of arrow 55, the arm 24 also swings in the direction of arrow 54 centering on the hinge pin 22b, and the bracket 26 pivotally attached by the hinge pin 25 to the substantially central position in the direction of arrow 52. The brake shoe 27 attached to the bracket 26 swings and comes into contact with the disk 7. Thus, the hydraulic release brake 20 performs the braking operation by engaging the brake disk 7 from both sides. Since the hydraulic valve 104 is set to the "open" state and the hydraulic oil is discharged to the hydraulic tank through the throttle valve 95b with a small throttle amount, the braking time of the hydraulic release brake 20 is shortened.
[0044]
Next, when the hydraulic oil is discharged from the hydraulic cylinder 64 of the hydraulic release pulley brake 60 in the hydraulic circuit diagram of the hydraulic unit 90 shown in FIG. 6, the rod 70 is mounted from both upper and lower ends of the rod 70 as shown in FIG. The arms 61a and 61b are in the open position, and the compressed springs 73a and 73b are in contact with the spring receiving block 71 and the spring 73b in contact with the spring 73a by the elastic restoring force. When the block 72 slides the rod 70 in the directions of arrows 82 and 83 toward each other, the one arm 61a pivots about the fixed shaft 63 in the direction of arrow 84 and the other arm 61b moves in the direction of arrow 85. The brake shoe 62a and the brake shoe 62b attached to the arm 61a and the arm 61b are turned into the pulley 11 from above and below. Contact with the disk surface 11a and the disk surface 11b, further, to the braking operation by pressing an elastic restoring force of the spring 73a and the spring 73b to stop the rotation of the pulley 11 stops operation of the carriage.
[0045]
That is, at the point b of the braking curve 132 shown in FIG. 10, when the speed of the transporter decreases to the deceleration end speed Vb and the speed relay 129a (VR1) operates, the speed relay 129a (VR1) follows the deceleration command signal from the speed command amplifier 128 (VRF). The braking is switched from the electrical braking by the main circuit 120 to the mechanical braking by the hydraulic release brake 20 and the hydraulic release pulley brake 60, and the carrier stops at the point C. At this time, as described above, the hydraulic release brake 20 is operated in a short time by the adjustment amount of the throttle valve 95b, so that the transporter stops immediately, and the reverse travel of the transporter due to the cableway gradient is prevented. Further, since the delay time between the output of the above-described carriage stop signal and the actual deceleration of the carriage can be shortened as compared with the conventional mechanical braking, the deceleration of the carriage is reduced, and the swing in the traveling direction is reduced. As a result, the passenger can be stopped without giving the passenger any discomfort. At this time, the hydraulic release pulley brake 60 also operates.
[0046]
In addition, at the time point when the monitoring time tp has elapsed from the start time ta of the braking curve 132 shown in FIG. 10, if the speed has not been reduced to the monitoring speed Vp or less at the monitoring point p1 on the braking curve 132, FIG. 9, the speed relay 129b (VR2) of the control circuit 130 immediately operates, and the relay SC operates to operate the solenoid valves 102, 103, 104, and 105 provided in the hydraulic unit 90 as shown in the solenoid valve circuit 131 of FIG. The energization of the solenoids 102a, 103a, 104a, 105a is stopped. Therefore, the hydraulic oil supplied to the hydraulic cylinder 38 of the hydraulic release brake 20 passes through the throttle valve 95a arranged in the return circuit 110 and the solenoid valve 103 which has been turned off and turned "open" to pass the hydraulic tank. Discharge to 106. At this time, the braking time, that is, the braking deceleration is adjusted by adjusting the discharge amount of the hydraulic oil by the throttle valve 95a. Further, the solenoid valve 104 is turned to the "closed" state by stopping the energization, and the hydraulic oil does not pass through the throttle valve 95b side. Is performed.
[0047]
The hydraulic oil supplied to the hydraulic cylinder 64 of the hydraulic release pulley brake 60 is also supplied with the throttle valve 95c arranged in the return circuit 111 of the hydraulic unit 90 and the electromagnetic valve 105 which is in the "open" state by stopping the energization. And discharged to the hydraulic tank 106. At this time, by adjusting the discharge amount of the hydraulic oil also by the throttle valve 95c, the braking deceleration by the hydraulic release pulley brake 60 is adjusted to perform the braking action. Accordingly, the deceleration operation is monitored by the timer T2 and the speed relay 129b (VR2) by the integrated driving safety relay DSC, and as soon as it is detected that the vehicle is not decelerating, the relay SC is activated and the same hydraulic release brake 20 and hydraulic release as the conventional one are performed. The pulley brake 60 operates to perform braking on the locus of the braking curve 133 shown by the broken line in FIG. In addition, even when an abnormality occurs in the main circuit 120 shown in FIG. 7, the total security relay TSC operates to perform the same braking operation. In this way, when an electrical abnormality occurs, the same mechanical hydraulic release brake 20 and hydraulic release pulley brake 60 as in the prior art are operated to ensure double safety.
[0048]
【The invention's effect】
As described above, the braking device of the present invention changes the pulse signal to be transmitted to the thyristor controlling the rotation of the main motor based on the deceleration command signal from the deceleration command amplifier based on the preset braking curve. The speed of the main motor that drives the wound pulley is reduced to a speed just before stopping electrically, and then the speed relay detects that the speed has decreased, and the output has been made until then. The deceleration command signal from the speed command amplifier is interrupted, and the mechanical hydraulic release brake and the hydraulic release pulley brake are operated to stop the rotation of the pulley, thereby stopping the carriage.
[0049]
In this way, by using both the electric braking and the mechanical braking, in the electric braking, the time delay from the output of the stop signal to the start of the braking operation is shortened, and the fantasy distance is reduced. Since there is no mechanical contact, slow braking can be achieved by keeping the deceleration constant, so the swing of the carriage during braking is reduced, reducing passengers' anxiety and the swing of the carriage. As a result, it is possible to prevent a rope moving in the cableway from coming off from the cable receiving device attached to the support, thereby preventing an accidental disconnection.
[0050]
In addition, if an abnormality occurs in the above-described control device or the vehicle does not decelerate to a predetermined speed during deceleration, immediately switch to a mechanical hydraulic release brake and a hydraulic release pulley brake to brake the transporter. As a result, the same reliability as that of the related art is ensured, so that the effect of the present invention is great in terms of improvement of safety.
[Brief description of the drawings]
FIG. 1 is a side view of a driving apparatus provided with a braking device of the present invention.
FIG. 2 is a partially sectional plan view showing a braking state of a mechanical hydraulic release brake.
FIG. 3 is a partially sectional plan view showing an open state of the hydraulic release brake shown in FIG. 2;
FIG. 4 is a side view showing a braking state of a mechanical hydraulic release pulley brake.
FIG. 5 is a side view showing an open state of the hydraulic release pulley brake shown in FIG. 4;
FIG. 6 is a hydraulic circuit diagram of a hydraulic unit for operating the mechanical hydraulic release brake and the hydraulic release pulley brake of the present invention.
FIG. 7 is a control circuit diagram of a main motor for rotationally driving a pulley around which a cable is wound.
FIG. 8 is a sequence circuit diagram for operating a relay for a solenoid valve of a hydraulic unit by two speed relays.
9 is a sequence circuit diagram for operating the solenoid of the solenoid valve of the hydraulic unit with the relay shown in FIG.
FIG. 10 is a diagram showing a braking curve by the braking device of the present invention.
FIG. 11 is a side view showing a conventional driving apparatus.
FIG. 12 is a hydraulic circuit diagram of a hydraulic unit for operating a conventional mechanical hydraulic release brake and a hydraulic release pulley brake.
FIG. 13 is a diagram showing a braking curve of a transporter by a conventional mechanical hydraulic release brake and a hydraulic release pulley brake.
[Explanation of symbols]
1 prime mover
2 cords
3 Drive frame
4 front legs
5 rear legs
6 Main motor
6a Output shaft
7 Brake disc
8 Motor frame
9 Universal joint
10 Reduction gear
10a input shaft
10b Output shaft
11 pulley
11a, 11b Disk surface
12 bus stop
20 Hydraulic release brake
21 Base
22a, 22b Hinge pin
23, 24 arms
25,25 hinge pin
26, 26 Bracket
27,27 Brake shoe
28 tie plate
29, 30, 31, 32 hinge pin
33 lever
34 rod
35 Spring case
36 spring
37 receiving money
38 Hydraulic cylinder
38a Piston rod
39 Arrow
40 Refueling port
41 pin
42 Adjustment rod
43, 43, ... nut
44 Rod support
45, 46, 47, 48, 49, 50 Arrows
51, 52, 53, 54, 55, 56 Arrows
60 Hydraulic release pulley brake
61a, 61b arm
62a, 62b Brake shoe
63 fixed shaft
64 hydraulic cylinder
65 Receiving block
65a, 65a pin
66 Receiving block
66a, 66a pin
67 Adjusting bolt
68 Support
69 Positioning bolt
70 rod
71 Spring support block
71a, 71a pin
72 Spring support block
72a, 72a pin
73a, 73b spring
74,75 receiving washer
76, 76 Adjustment nut
77, 77 Lock nut
78, 79, 80, 81 Arrow
82, 83, 84, 85 Arrow
90 hydraulic unit
91a, 91b Pressure gauge
92a, 92b Relief valve
93a, 93b, 93c, 93d Stop valve
94a, 94b Stop valve
95a, 95b, 95c Throttle valve
96a, 96b, 96c Check valve
97 Pressure switch
98 Compressor
99 Filter
100 hydraulic pump
101 strainer
102, 103, 104, 105 Solenoid valve
102a, 103a, 104a, 105a solenoid
106 hydraulic tank
107 Hydraulic release brake circuit
108 Hydraulic release pulley brake circuit
109 Supply circuit
110, 111 Return circuit
120 main circuit
121 Thyristor
122 Gate pulse generator
123 main motor
124 rotating generator
125 voltage amplifier
126 current amplifier
127 speed amplifier
128 Speed command amplifier
129a, 129b Speed relay
130 control circuit
131 Solenoid valve circuit
132,133 braking curve
134 Setting braking curve
140 Solenoid valve circuit
141 Main motor
142 reducer
143 pulley
143a, 143b Disk surface
144 hydraulic release brake
145 hydraulic cylinder
146 Hydraulic release pulley brake
147 Hydraulic cylinder
148 rope
149 brake disc
150 Hydraulic unit
151a, 151b Pressure gauge
152a, 152b relief valve
153a, 153b, 153c, 153d Stop valve
154a, 154b Stop valve
155a, 155b Throttle valve
156a, 156b, 156c Check valve
157 Pressure switch
158 Compressor
159 Filter
160 hydraulic pump
161 strainer
162,163,164 Solenoid valve
162a, 163a, 164a solenoid
165 hydraulic tank
166 Supply circuit
167 Hydraulic release brake circuit
168 Hydraulic release pulley brake circuit
169,170 Return circuit
A, B, C, D, E, F, G Branch point
H, I, J, K, L, M, O branch point
P, Q, R, S branch point
X, Y, Z points
SA, SB, SC relay
a, b, c, p points
p1 Monitoring point
Va operating speed
Vb Deceleration end speed
Vp monitoring speed
ta braking start time
tb Motor deceleration end time
tp monitoring time
tc Braking end time
tx, ty, tz time
THY Thyristor
GPG gate pulse generator
DCM main motor
PG rotating generator
VCA voltage amplifier
CCA current amplifier
SCA speed amplifier
VRF speed command amplifier
VR1, VR2 speed relay
M1, M2 motor
T1, T2 timer
TSC Total Security Relay
DSC Operation Safety Relay

Claims (1)

A cableway braking device in which the operating speed of a carrier can be changed by changing the rotation speed of a main motor that drives a pulley around which a rope is wound by a control device ,
The control device includes a speed command amplifier that sets a braking curve, a speed relay that operates at a set rotation speed, and the braking device includes a hydraulic release brake ,
Throttle valve to have the speed relay signal in selectable manner at least two systems the pressure oil in the return circuit comprising a solenoid valve for actuation of the hydraulic unit for actuating the oil pressure release brakes comprising,
When the transporter is decelerated to a predetermined speed by lowering the rotation speed of the main motor by a deceleration command signal of the speed command amplifier from a normal operation speed, the speed relay operates to interrupt the deceleration command signal. At the same time, braking is performed by the hydraulic release brake when the vehicle is stopped by the hydraulic release brake until the carriage stops , and when the operating speed when a set time has elapsed from the start of the braking curve is higher than the set speed. to configure such a braking device cableway selection of the oil pressure release brakes of the braking time, characterized in that to perform the selection of the return circuit of the hydraulic fluid.

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