JPH02234873A - Device and method for measuring grip force of detacher type gripper for lift carrier - Google Patents

Abstract

PURPOSE:To enable the precise grasp of a true gripping force by measuring the gripping force of a detacher type gripper gripping a support towing rope every departure of lift carriers, comparing it with a determined gripping force, and indicating the comparison result on a display device. CONSTITUTION:In a carrying facility containing lift carriers provided on a detacher type gripper 1 gripping a moving support towing rope by spring force, respective advance and retreat detectors 26a, 26b for detecting the advance and retreat of the gripper are provided on the inlet and outlet of the gripping territory in the rear of a departure accelerator for making lift carriers depart. A pressing force transmitting member 18 is provided on a gripping rail in the gripping territory, and a gripping force detector 27 for detecting the pressing force in accordance with the pass of a gripping roller is provided on its displacing side. In a gripping force judgment control means 28, the measured gripping force is compared with a set gripping force during the time from the detection of the advance of the lift carrier to the detection of its retreat to judge the suitability of the gripping force, and the data related to the gripping force is indicated on a display device 29.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a device and method for measuring the gripping force of a detacher-type rope gripping machine for a lift carrier, and more particularly, to a rope gripping force measuring device and a method for measuring the gripping force of a detacher-type rope gripping machine for a lift carrier. This invention relates to the measurement of the gripping force in a gripping type conveyance facility in which a tow rope is gripped and a lift carrier is transported via a rope gripping machine.

[Conventional technology]

In ski lift equipment, ropeways, etc., a support rope that moves while being supported and guided by rotating supports such as rope rings or pulleys is stretched, and multiple lift carriers that grip the support rope move the support rope. Some items are designed to be transported by The detacher-type rope gripping machine used in such a device is designed to grip the rope using a gripping force generated by a built-in spring or other spring that strongly presses the support rope. Therefore, when the elastic force is insufficient due to a defect in the projectile, aging or damage to the projectile, slipping may occur between the tow rope and the detacher-type rope gripping device, or the detacher-type rope gripping device may fall off. This may cause problems with the transport of the lift carrier. Therefore, safety measures are taken such that the gripping force is constantly detected and if there is a decrease in the gripping force, the movement of the tow rope is immediately stopped and the lift carrier is not started.

For example, Japanese Utility Model Publication No. 58-36617 describes a rope gripping force detector for a rope gripping machine, and Japanese Patent Application Laid-Open No. 60-94863
The publication proposes a device for detecting poor grip strength of a cableway. These rope gripping machines have a roller that detects whether the rope gripping force is normal or insufficient, and the roller surface is brought into contact with a rope gripping force detection lever or a pressure lever that is biased by a spring. When the gripping force is normal, the detection lever is pressed by the roller, and when it is insufficient, the roller retreats and is not pressed. In this type of detection of rope grip force, the elastic force of a spring is used to detect excess or deficiency of the rope grip force using a limit switch, etc.
The detection results are processed electrically to stop the movement of the towline. Furthermore, the grip force is detected when the lift vehicle is stopped or at low speed, and the start acceleration of the lift vehicle is started after a predetermined grip force is confirmed. Incidentally, Japanese Unexamined Patent Publication No. 60-94863 and Japanese Patent Publication No. 59-40666 disclose devices in which slippage of a lift carrier with respect to a support rope, that is, poor gripping force, is detected by pulse counting.

[Problem to be solved by the invention]

In the above-mentioned rope gripping force failure detection device, in order to detect whether the rope gripping force is correct or not in a detacher type rope gripping machine, a pressure lever equipped with a spring and a pressure lever that is activated when the amount of pressure exceeds a certain amount is used. It is equipped with a limit switch. This has the advantage of simplifying the structure, but there is a problem that the limit switch operation may become inaccurate due to the quality of the spring, fatigue, or damage, making safe and reliable operation management difficult. . Furthermore, since this is not the rope gripping force when the lift carrier reaches a speed synchronized with the tow rope, there is a problem in that the true rope gripping force cannot be confirmed.

Furthermore, when the towline is moving normally, or
When the rope is automatically stopped due to insufficient grip strength, the grip strength detected by the poor grip strength detection device is not displayed or recorded in the operation control room. Because of this, it is not possible to understand the changes in the gripping force leading up to the lack of gripping force, leaving concerns about safety management, and the problem of requiring time and effort to perform post-processing such as troubleshooting. There is.

The present invention was made in view of the above-mentioned problems, and its purpose is to accurately measure the gripping force of the detacher-type rope gripping machine that grips the tow rope each time the lift carrier starts, and to maintain a predetermined value. RiffHl displays the grip strength digitally in real time, allowing for smooth and easy safety management of multiple lifts based on highly reliable operation information.
An object of the present invention is to provide a rope grip force measuring device for a dexterous detacher type rope grip machine and a method for measuring the same.

[Means for Solving the Problems] Features of the rope gripping force measuring device for a detacher type rope gripping machine for a lift carrier according to the present invention will be explained with reference to FIGS. 1 and 2.

A gripping roller 6 is attached to the tip of a shifting lever 5 that grips the moving towline 2 with the elastic force of a spring 3 to transport the lift carrier 4 and transmits the gripping reaction force. Entrance 26 m of the rope gripping section 26A located behind the detacher type rope gripping machine 1 and the departure acceleration device 24 that starts the lift carrier 4
and a detacher type rope gripping machine 1 provided at the exit 26n.
There is a rope gripping machine entry detector 26a that detects the entry of the rope, and a rope gripping machine exit detector 26b that detects the exit of the rope. Cable section 2
The gripping rail 17 that guides the movement of the gripping roller 6 at 6A has a pressing force transmitting member 18 that is displaced from its guide surface 17a, and the pressing force transmitting member 18 is disposed on the displacement side of the gripping roller 6. A gripping force detector 27 is provided to detect the pressing force as the line passes. After the rope gripping machine entry detector 26a detects that one lift carrier 4 has entered, and before the rope gripping machine exit detector 26b detects the exit of the lift carrier 4, the gripping force detector 27 There is a rope grip force determination control means 28 that compares the measured rope grip force based on the detection signal from the predetermined rope grip force value set in advance and determines whether the measured rope grip force is appropriate. A display device 29 is provided for displaying data regarding the gripping force using a signal from the force determination control means 28.

The pressing force transmitting member 18 is provided with a vibration absorber 46 (see FIG. 4) that absorbs vibrations when the gripping roller 6 passes.

A load cell is employed as the gripping force detector 27. The load cell has two sensors 27A. 27B and corresponding to each sensor, gripping force determination control means 28
A and 28B (see FIG. 12) are provided.

If one lift carrier 4 is equipped with two or more detacher type rope gripping machines IA, IB, the difference in the gripping force of the two or more detacher type rope gripping machines is within a set allowable difference value. If the difference is outside the allowable range, an alarm is issued by the alarm device 49 and an emergency stop device 50 is issued.
It is preferable to provide a differential suitability determination section 78 (see FIG. 15) that commands the movement of the lift carrier 4 to be stopped.

The rope gripping force determination control means 28 includes a detacher complete rope gripping machine 1.
A pulse counter 62 (see Fig. 3) counts the number of pulses from a pulse generator 52 (see Fig. 2) that emits pulses in conjunction with the speed of the towline 2 when the rope enters the gripping section. and a detection signal output timing appropriateness determination unit 6 that determines whether the detection target Φ detection signal is output within a predetermined number of pulses.
8.74 and the signal from the detection signal output timing appropriateness determination unit, it is determined whether the rope gripping machine 1 is synchronized with the speed of the tow rope 2 and the distance between the rope gripping machine 1 and the tow rope 2. A speed synchronization determining unit 65 determines whether or not a slip is occurring, and instructs an alarm device 49 to issue an alarm and an emergency stop device 50 to stop the movement of the lift carrier 4 if the speeds are out of synchronization or slip. Reference].

On the other hand, in the rope gripping force measurement method of the detacher type rope gripping machine of the present invention, after the detacher type rope gripping machine 1 has completely gripped the tow rope 2, the moving speed of the rope gripping roller 6 is It is determined that the towline 2 has synchronized with the speed, and if the synchronized speed has been reached, the rope gripping force of the rope gripping roller 6 in the pressing force transmission member 18 is detected.

[For production]

A detacher-type rope gripping machine 1 that grips a tow rope 2 with the elastic force of a spring 3 and moves together with the tow rope 2 to convey a lift carrier 4.
When the vehicle arrives at the station building, the shift gripper 5 is rotated and the grip on the tow rope 2 is released. While the lift carrier 4 is being moved at low speed, passengers are boarded and luggage is loaded, and the lift carrier 4 is sent to the departure acceleration device 24. When the detacher-type rope gripping device 1 passes through the entrance 26m of the rope gripping section 26A located at the rear of the departure accelerator 24, the rope gripping device entry detector 26a is activated, and preparations are made to detect and calculate the rope gripping force.

When the lift carrier 4 is accelerated and reaches a speed synchronized with the towline 2, the gripping roller 6 is moved by the gripping rail 17 of the gripping section 26A.
is guided, and the shifting lever 5 is rotated. The spring 3 grips the support rope 2 and the lift carrier 4 starts to be transported by the support rope 2. At this time, the elastic reaction force of the spring 3 , more specifically, its component force, is transmitted to the gripping rail 17 via the gripping roller 6 . When the gripping roller 6 passes over the pressing force transmitting member 18 interposed in the gripping rail 17, the pressing force transmitting member 18 is rotationally displaced, and the gripping force detector 27 directly below it is pressed. Grip force is detected. The detection signal is input to the rope grip force determination control means 28, the measured rope grip force is compared with a predetermined rope grip force, and a determination is made as to whether the rope grip force is normal. Is displayed.

If the rope gripping force is normal, the previous display is maintained until the rope gripping machine exit detector 26b detects the entry of the next lift carrier 4, and the manager is informed that the operation is normal. In response to the approach signal of the lift carrier 4, the data displayed on the display device 29 is erased, and a standby state is entered for detecting the gripping force of the following lift carrier 4. Note that if the rope gripping force is insufficient, an alarm command signal or an emergency stop command signal is output from the rope gripping force determination control means 28, and the tow rope 2 is stopped to ensure safety.

By the way, the rope grip force detector 27 includes a sensor 27A. When two or more cables 27B are lined up, the rope grip force determination control means 28A and 28B are activated according to the respective sensors. Usually, one of them is selected and the other is used as a backup. Furthermore, when two detacher type rope gripping machines 1 are attached to one lift carrier 4, each rope gripping machine IA,
Since the rope grip force is detected for 1B, each is measured and determined. Even if there is insufficient grip strength on either side, an alarm will be issued and movement of the lift will be stopped.

As a method for measuring the rope gripping force, when the moving speed of the tow rope 2 and the speed of the lift carrier 4 are synchronized, the detacher type rope gripping machine 1 is activated, and then the rope gripping force of the lift carrier 4 is detected. , the gripping force of the rope is measured in a state equivalent to the conveying state based on the speed of the tow rope 2 after the lift carrier 4 has departed.

〔Effect of the invention〕

In the rope gripping force measurement device for a detacher-type rope gripping machine for a lift vehicle of the present invention, the gripping force is detected as the force for gripping the towline when the lift carrier equipped with the detacher-type rope gripping machine is started. The rope grip force is accurately measured by the device, and the measured rope grip force is compared with a predetermined rope grip force value that has been set and stored in advance by the rope grip force determination control means, and the result is displayed. Data such as grip force, which is important for driving, is always available fIi.
This allows for smooth operation and management.

In addition, if insufficient grip strength, slippage, or unsynchronization of the speeds of the lift vehicle and the support cable are detected, an alarm will be issued, the support cable will be stopped, and the transport of the lift vehicle will be automatically stopped. This prevents the lift carrier from slipping or falling off due to insufficient grip strength, ensuring safe operation.

In addition, the gripping force of each lift carrier during normal operation and changes in the gripping force until it stops can be confirmed visually or by stored data, and operation managers can use this data as a basis. Therefore, preventive maintenance can be performed before breakdowns occur, and accidents can be prevented from occurring.

When grasping the tow rope and detecting its grasping force, when the moving speed of the tow rope and the speed of the lift vehicle are synchronized, the detacher-type rope grasping machine is activated, and then the grasping force of the lift vehicle is activated. Since the force is detected, the rope grip force is measured in a state equivalent to the conveyance state due to the speed of the tow rope after the lift vehicle leaves the station building, and the true rope grip force by the detacher type rope grip machine is measured. The grip force of the rope can be measured.

[Example] Hereinafter, the rope gripping force measuring device and measuring method for a detacher-type rope gripping machine for a lift carrier according to the present invention will be described in detail using a cableway device as an example of one of the embodiments thereof.

FIG. 5 shows a detacher 2 rope gripping machine 1, which grips a moving tow rope 2 such as a wire rope with the elastic force of a spring 3 to transport a lift carrier 4 (shown small in the figure). do.

A rotatable shifting lever 5 is provided at the rear of the detacher type rope gripping machine 1 to which the elastic reaction force of the spring 3, which is the rope gripping reaction force, is transmitted, and a rope gripping roller 6 is provided at the tip of the shifting lever 5.
is installed. When this shifting lever 5 is rotated from a state in which the gripping roller 6 is located upward as shown by the solid line in FIG. 6 to a position downward as shown in the solid line in FIG. It is now being searched.

This detacher type rope gripping machine 1 is just one example, and the structure of this example will be described below. A long clip 8A having a gripping surface that pairs with a short clip 8B is provided at the tip of the gripping casing 7, which is made up of a cylindrical front hub 7A and a rear hub 7B. A shaft body 8 that can move forward and backward is housed inside the gripping casing 7, and a short clip 8B with a gripping surface is formed at the tip thereof, and a washer 8a fixed with a nut 9 is attached to the rear end. A large number of plates and springs 3 are fitted into the outer periphery of the central portion. The front part of this spring 3 is supported by a stepped abutment part of the shaft body 8, and the rear part is a tension bead 10 on which the shaft body 8 is fitted.
It is held in contact with the

When the tension bead 10 in the retracted position advances, the shaft body 8 is pressed and the short clip 8B advances through a lever roller 1l that advances under pressure from a locking cam 14, which will be described later. That is, when the tension bead 10 advances while compressing the spring 3, the short clip 8B comes into contact with the tow rope 2 and grips the tow rope 2 together with the long clip 8A, and the elastic force of the spring 3 causes the short clip 8B to A large gripping force is generated. Therefore, the long clip 8A and the short clip 8B exert a gripping force of, for example, about 200 kg, and the lift carrier 4 can move together with the tow rope 2.

A coil spring 12 is provided inside the gripping casing 7, and biases the short clip 8B toward the retreating side. The front part of the coil spring 12 is brought into contact with a stepped portion at the rear end of the front hub 7A, and the rear part is brought into contact with a sliding bearing liner 13 integrated with the outer periphery of the tension piece IO. A lever roller 11 is inserted into the rear part of the rear hub 7B, and the lever roller 11 is moved forward and backward by the locking cam 14. When the locking cam 14 protrudes, the lever roller 11 enters the gripping state, and when the locking cam 14 retreats, the lever roller 11 enters the detached state. Become.

Locking cam 1 for advancing and retracting the lever roller 11 mentioned above
4 is attached to a boot 15 located at the rear end of the rear hub 7B, and is rotatably held via a bottle shaft 16 inserted through the boot 15 and a twenty dollar bearing. moreover,
The above-mentioned shifting lever 5 is attached to the locking cam 14 to transmit the rotational force when protruding or retracting, and the tip of the shifting lever 5 has a grasping roller with a built-in roller bearing so that it can be shifted with sliding. 6 is attached. When in the gripping state, this gripping roller 6
via the tension bead 10, lever roller 11, locking cam 14 and shift lever 5,
The elastic reaction force of the spring 3 is transmitted. When the gripping roller 6 runs on a movable rail 18 as a pressing force transmission means interposed in the gripping rail 17 shown in FIG. 4, the gripping force detector 2
7, the pressing force of the above-mentioned rope grip force is measured.

Front wheels 19, 19 and rear wheels 20, 20 shown in FIG. 8 are attached to the front hub 7A and rear hub 7B, and in terms of ski lift equipment, they are used for speed reduction devices and departure acceleration provided at the foot station and the summit station. It travels on the guide rails 21 and 22 shown by the dashed-dotted line in the device, and the posture of the gripping casing 7 is maintained in a correct manner so that the gripping roller 6 can smoothly move along the gripping rail 17 shown by the dashed-double line. It has become.

On the upper part of the front wheel 19, a driving friction plate 23 shown in FIG.
is fixed and integrated, and sequentially comes into contact with multiple drive acceleration rollers and drive deceleration rollers provided inside the departure accelerator and deceleration device.Acceleration and deceleration at each station building is achieved by rotation of a series of drive rollers with different rotation speeds. is now being carried out smoothly.

FIG. 2 is a system diagram of the rope gripping force measuring device 25 provided in the departure acceleration device 24 shown in plan, showing the detacher type rope gripping machine 1, the approach of the rope gripping machine 1 to the rope gripping section 26A, and A passing detector 26 that detects exit, a rope gripping force detector 27 that detects the pressing force of the movable rail 18 provided on the gripping rail l7, a rope gripping force detector 27 that calculates the gripping force, determines whether it is possible, and measures it as necessary. A display device 29 is provided to display data related to the rope grip force.

As described above, the detacher type rope gripping machine 1 uses a shifting lever that grips a moving towline 2 with the elastic force of a spring 3, conveys a lifting device 4, and transmits the reaction force of the gripping. -5 has a gripping roller 6 attached to its tip. The passing detector 26 is a rigging machine entry detector 26a, which is a proximity switch, for example, provided at the entrance 26m and the exit 26n of the rigging section 26A after the refrigerator 4 is accelerated to a predetermined speed.
and a rope gripping machine exit detector 26b, etc., and the detection signal thereof is inputted to the rope gripping force determination control stage 28, and the rope gripping force calculation preparation command unit 61 shown in FIG. A preparation signal for calculating the rope grip force of one lift carrier 4 and a signal for confirming the completion of the calculation of the rope grip force are outputted through the section 73.

The rope grip force detector 27 is, for example, a strain gauge type load cell, and detects the rope grip force based on the amount by which the electric resistance value changes when a load is applied, and inputs the detection signal to the rope grip force determination control means 28. do. As shown in FIG. 2, the rope grip force determination control means 28 compares the rope grip force with a predetermined predetermined rope grip force value based on the measurement signal from the load cell 27, and determines whether the rope grip force is appropriate or not. It is a microcomputer that

This consists of a fixed memory 30, a write memory 31, a central processing unit 32, an output card 33, etc., and the fixed memory 30 is used to store the lift carrier 4 when the detacher type rope gripping machine 1 grips the tow rope 2. Predetermined gripping data necessary for driving is stored. Note that the predetermined gripping force may be set externally using a dial or the like. In that case, there is an advantage that the setting values can be easily changed without changing the software. The write memory 31 stores the results calculated by the central processing unit 32 each time, and sends the data to the output card 33 as necessary. The display device 29 uses a signal from the output card 33 to display data regarding the gripping force in digital values on a CRT or a graphic panel, and to print it out on a printer.

A drive pulley 35 driven by an electric motor (not shown) is provided in the station building 34 shown in FIG. It is supposed to move to. And arrow 3
When the detacher-type rope grip machine returning from six directions passes through the deceleration device 38, the rope grip roller 6 shown by the solid line in FIG. 5 is moved upward as shown by the solid line in FIG. 6.

At that time, the lower shifting lever 5 is approximately 80
As the locking cam 14 is rotated, the locking cam 14 is retracted, and the scissor clip 8B is retracted together with the tension piece 10 by the elastic force of the coil spring l2. As a result, the detacher type rope gripping machine 1 is pulled from the tow rope 2 and the tow rope 2
moves at the same speed. Guide rails 21 and 22 for running the front wheels 19 and rear wheels 20 are provided in the reduction gear 38.
(see FIG. 8), and a series of deceleration rollers (not shown) are arranged that contact the driving friction plate 23 and decelerate the speed.Therefore, the lift carrier 4 is decelerated and rotated as shown in FIG. is sent at low speed to the conveyor rail 39 of
The signal is sent to the departure acceleration device 24 on the departure side.

Furthermore, a gripping section 26A at the rear position of the departure acceleration device 24
is provided with a gripping rail 17 and a movable rail 18, and above them is a gripping rail 4 shown in FIG.
0 is attached. Then, the gripping roller 6 is moved by the arrow 41
When moving in the direction, the gripping rail 40 moves the gripping roller 6 located above as shown in FIG. 6 downward as shown by the solid line in FIG. The gripping rail 40 has a shifting lever between it and the opposing gripping rail 17.
An inclined surface 40a is formed so that the locking cam 14 can be rotated about the bottle shaft 6 and protruded. Therefore, the detacher type rope gripping machine 1
to prevent slipping between the tow rope and the tow rope 2.
It can be run as an integrated vehicle.

Guide rails 21 and 22 laid on the departure accelerator 24 [
The above-mentioned movable rail 18 is disposed parallel to FIG. 8 and behind the grip rail 17 that guides the movement of the grip roller 6. The rear end is attached to the gripping rail 1 as shown in Figure 4.
The guide surface 18b is rotatably fitted into a pivot shaft 42 attached to the handle rail 7, and when the rope grip roller 6 does not pass through, its guide surface 18b is held at the same level as the guide surface 17a of the rope grip rail 17.

When the gripping roller 6 passes, the movable rail 18 is slightly displaced and rotated toward the displacement side 18a in response to the pressing force. Furthermore, a casing 43 fixed to the gripping rail 17 is formed on the lower side of the movable rail 18, and a gripping force detection device is provided at the bottom of the casing 43 for measuring the gripping reaction force transmitted from the gripping roller 6. A container 27 is installed. An actuating piece 44 fixed to the lower surface of the movable rail 18 is attached directly above the grip force detector 27. When the guide surface 18b is lower than the guide surface 17a, the lower end of the actuating piece 44 touches the load cell 27. It is designed to exert a pressing force. Note that the measurement signal from the load cell 27 is input to the rope grip force determination control means 28 after being amplified by an amplifier 45 (see FIG. 2). In this example, a spring rubber or the like is installed between the pivot shaft 42 and the gripping reaction force detector 27 to absorb and prevent vibrations and shocks when the gripping roller 6 passes, and to enable stable measurement. A vibration absorber 46 is provided. Furthermore, a contact piece 47 is interposed on the lower surface of the movable rail 18 directly above the vibration absorber 46, and the position of the actuating piece 44 is regulated so that it always comes into light contact with the gripping rail 17 and the head of the load cell 27.

By the way, as shown in FIG. 2, an alarm device 49 that issues an alarm to notify that the transportation state of the lift carrier 4 is not normal and a drive motor 48 An emergency stop device 50 is provided to stop the. Furthermore, the bar code attached to the lift carrier 4 that is detecting the grip force is optically read, the lift carrier 4 is identified, and the bar code is displayed on the display device 2.
9 is also installed. Further, a pulse generator 52 is installed which emits a pulse in conjunction with the speed of the towline 2 from the time when the detacher type rope gripping machine 1 enters the rope gripping section 26A. According to this,
It is determined whether the detection signal of the detection target is output within a predetermined number of pulses, and if there is no detection signal within the predetermined number of pulses, it is determined that the detacher type rope gripping device 1 is not synchronized with the speed of the towline 2 or is not being gripped. It is possible to report that the rope machine 1 is slipping with the tow rope 2. In addition, in combination with a timer 60 (see Figure 3), which will be described later, it is determined whether the rope gripping machine 1 and the tow rope 2 are at the same speed at the time of detection of rope gripping force, and if they are not synchronized, an alarm is issued. And it can also be stopped.

According to the rope gripping force measurement device 25 having such a configuration, it is possible to accurately determine whether the rope gripping force by the detacher type rope gripping machine 1 is normal when the lift carrier 4 is started, and to determine whether the rope gripping force is normal or not in the following manner. Based on the determination result, operation management and maintenance inspection of the lift carrier 4 can be simplified. The explanation will be made with reference to the block diagram in FIG. 3 and the flowcharts shown in FIGS. 11(a) and 11(b).

When a person boards the lift carrier 4 shown in FIG. 2 which has been folded back on the transport rail 39 (see FIG. 9), the lift carrier 4 is sent to the approach zone of the departure accelerator 24, and the lift carrier 4 in a low speed state is gradually accelerated. At the point when the detacher type rope gripping machine 1 passes the entrance 26m of the rope gripping section 26A, [
Step 1 of the flowchart, hereinafter referred to as 31, etc.] the proximity switch 26a operates [S2], the progress of the lift carrier 4 is detected, and the grip force calculation preparation command unit 61 starts measuring the grip force of the lift carrier 4. Preparations will be taken for this purpose.

This detection signal is used as a start signal for detection of the gripping force by the gripping force detector 27 and calculation for determining whether the gripping force is appropriate or not in the gripping force determination control means 28.

When the operation confirmation signal of the proximity switch (rope grip machine entry detector) 26a is output, the pulse counter 62 is activated by a pulse generator that generates continuous pulses in conjunction with the moving speed of the tow rope 2. 52 starts counting the number of pulses P, and the timer 60 also starts time counting [S
3]. Note that the data of the preceding lift carrier 4 is erased from the display device 29 at this point (34), and the data is stored in the data storage section 63 [S5]. Proximity switch 2
Immediately after the operation of 6a, the lift carrier 4 is detected by the carrier number detector 51.
The number is detected [S6] and is immediately input to the rope grip force determination control means 28.

In addition, whether or not the time when the carrier number was detected is within the count value of the stored first set pulse number P,
It is determined in the carrier number detection signal output timing appropriateness determining section 64 [S7]. If the carrier number is not detected by the first set pulse number P, the speed synchronization determination unit 65 determines that the speeds of the rope gripping machine 1 and the tow rope 2 are not synchronized, and the alarm command unit 66 and emergency stop are performed. A slip signal is output to the command section 67. Then, the drive motor 48 is stopped in the emergency stop device 50 (S8), an alarm is issued from the alarm device 49 [S9], and a safety function is activated against an abnormality in the movement of the lift carrier 4.

If the carrier number is detected within the count value of the first set pulse number PI, the movement of the lift carrier 4 is maintained, and the detacher type rope gripping machine 1 grips the tow rope 2 (SIO).

Note that since the tow rope 2 is moving at a constant speed, the lift carrier 4 has undergone a series of drive accelerations in the departure acceleration device 24 by the time the tow rope 2 is gripped by the detacher type rope gripping machine 1. It is accelerated by the rollers to the moving speed of the towline 2. Once the speeds are synchronized, the gripping roller 6
is pushed down by the inclined surface 40a of the gripping rail 40, the shifting lever 5 is rotated downward (see FIG. 7), and the locking cam 14 shown in FIG.
is advanced, and the towline 2 is gripped by the long clip 8A and the short clip 8B. Determine this speed synchronization,
If it is within a predetermined range, it is determined that it is synchronized.

When the gripping roller 6 rolls on the movable rail 18 (see FIG. 4) that constitutes a part of the gripping rail 17, the guide surface 18
A gripping reaction force acts on b. Due to this force, the movable rail 18 rotates about the pivot 42 toward the displacement side 18a and descends, and the operating piece 44 presses the load cell 27 to measure the rope grip force (Sll). Note that while the rope grip roller 6 is passing, the vibration absorber 46 is attached to the movable rail 18 via the contact piece 47.
It also absorbs the vibrations of the operating piece 44 and the impact received from the gripping roller 6. If this gripping force is not detected by the end of counting the second set pulse number P8 (5
12) The rope grip force detection signal output timing appropriateness determination unit 6 determines this fact, and the speed synchronization determination unit 65 considers it to be unsynchronized and outputs an unsynchronized signal to the alarm command unit 66 and emergency stop command unit 67. . If the speeds are synchronized, a detection signal of the rope grip force is outputted by the end of counting the second set pulse number P2, and is taken into the rope grip force determination control means 28 via the amplifier 45 (see FIG. 2) (313). ), grip force calculation unit 69
The grip force value is calculated and used as measurement data (314).
.

The measured rope grip force is compared with the rope grip force stored in the predetermined rope grip force value storage unit 71 in the rope grip force adequacy determination unit 70 (S15). Measurement data is displayed on the display device 29 from the display command unit 72 (3
16). If the predetermined rope grip force is not obtained, after displaying the data (317), a signal based on the insufficient rope grip force is output to the alarm command section 66 and the emergency stop command section 67, and the emergency stop device 50 starts driving. The driving of the motor 48 is stopped [S8], and an alarm is issued from the alarm device 49 [S9].
]. As shown in FIG. 4, the display device 29 displays on a liquid crystal display 29a or CRT 29A the carrier number, the measured rope gripping force, the difference from a predetermined rope gripping force, etc.

If the measured rope gripping force is a predetermined rope gripping force, the lift carrier 4 is allowed to leave. When the lift carrier 4 leaves the gripping section 26A [318], the completion of the measurement is commanded by the gripping force calculation completion confirmation command unit 73 by operating the proximity switch 26b. At the same time, the time when the lift II device 4 is detected by the rope grip machine exit detector 26b is the third set pulse number P.
The exit detection signal output timing appropriateness determination unit 74 determines whether or not it is before the count of 3 (S19). If the lift carrier 4 is not detected by the end of counting the third set number of pulses P, the speed synchronization determination unit 65 determines that the rope gripping machine 1 is slipping with the tow rope 2, and issues an alarm command unit. A slip signal is output to the emergency stop command section 66 and the emergency stop command section 67, and safety measures are taken against abnormal movement of the ref. If the exit signal is detected before counting the third set pulse number P3 (S20), pulse counting is stopped and the pulse number P is cleared (S2
1).

Then, the process returns to step 1, and the previous data is maintained on the display device 29 until the subsequent lift carrier 4 approaches (S22). Please note that all data will be saved.
If necessary, the change in grip strength of each lift carrier is recorded over time with a separate printout, which allows for permanent monitoring.

By the way, as shown in the block diagrams of FIGS. 2 and 12, the load cell 27 may be provided with two sensors 27A and 27B to form a double circuit. In this case, even if a sensor malfunction occurs, the sensor selector 75 selects the other circuit, allowing continued operation of the cableway without having to suspend operation. In this example, in addition to the rope grip force determination control means 28A, another rope grip force determination control means 28B is provided to process signals from the respective sensors 27A and 27B. The sensor selector 75 may be a switch type device, or may be a sensor selector included in the rope grip force determination control means 28. Alternatively, the two sensors 27A and 27B may be operated at all times. In this case, the rope grip force determination control means 2
8A and 28B process detection signals from the respective sensors, respectively.

Furthermore, as in the example shown in FIG. 13, the difference between the rope grip force values may be determined by the measured rope grip force difference calculation unit 76.

In this case, the difference suitability determination section 78 determines whether the difference is within a predetermined tolerance in the tolerance difference storage section 77 . If the difference is outside the allowable range, an alarm is issued by the alarm device 49, and the movement of the lift carrier 4 is stopped by the emergency stop device 50. When the difference suitability determination section 78 determines that there is an allowable difference, the measured rope grip force from one of the rope grip force calculation sections, for example 69A, is stored in the rope grip force suitability determination section 70 as the predetermined rope grip force storage section 71. Contrasted with configuration data from . The subsequent processing follows steps 16 and 17 in the flowchart.

FIG. 14 is a block diagram when two detacher-type rope gripping machines IA and IB are attached to the lift carrier 4, for example, like a gondola lift. If it is sufficient to detect the gripping force by one rope gripping machine, one of the rope gripping machines is selected in the rope gripping machine selection section 79, and based on the detection signal thereof,
Operations such as predetermined calculations, determinations, and displays are performed.

The other rope gripping machine is used as a backup in case one of them breaks down. Note that the rope gripping machine selection section 79 can be included in the rope gripping force determination control means 28 or can be a switch-type device.

FIG. 15 shows the rope gripping forces of two detacher-type rope gripping machines IA and IB detected before and after the time, and their detection signals are used in the same way as in FIG. 12 to calculate the measured rope gripping forces of each. This was designed to ensure safety. Also in this case, either one of the two rope grip force determination control units 28A, 28B is used for backup.

Incidentally, in any case, as shown in FIG. 4, there are two display devices 29a, one for one station building and one for the other station building.
, 29b, monitoring becomes easy. Of course, even when there are two sensors or when two detacher-type rope grippers 1 are attached to one lift carrier 4, it is convenient to display as many displays as necessary for safety. In the above example, when the moving speed of the tow rope 2 and the speed of the lift carrier 4 are synchronized, the detacher-type rope gripping machine 1 is activated, and then the rope gripping force of the lift carrier 4 is detected. There is.

This means that the rope gripping force is measured in a state equivalent to that during transportation at the rated speed after the lift carrier 4 leaves the station building 34, so the true rope gripping force by the detacher type rope gripping machine 1 is measured. As a result, safety confirmation will be accurate. It goes without saying that the present invention can be applied not only to cableway apparatuses but also to conveyance apparatuses in which a carrier can be attached to and detached from a moving tow rope.

[Brief explanation of the drawing]

FIG. 1 is a main block diagram of the rope grip force measuring device for a detacher-type rope gripping machine for a lift carrier according to the present invention, FIG. 2 is a schematic system diagram of the gripping force measuring device, and FIG. 3 is a detailed block diagram.
Figure 4 is a diagram of the movable rail and the gripping force detector installed on the gripping rail, Figures 5 and 6 are longitudinal sectional views of the detacher type gripping machine, Figure 7 is an external view of the gripping machine, Figure 8 is a plan view showing the direction of arrows in Figure 7, Figure 9 is a schematic plan view of the inside of the station building, Figure 10 is a schematic side view of the gripping rail, and Figure 11 is a schematic plan view of the inside of the station building.
Figures (a) and (b) are flowcharts for explaining the operation of the rope grip force measuring device, and Figures 12 to 15 are block diagrams showing the configuration of different examples. 1, IA, IB - Detacher type rope gripping machine, 2 - One branch tow rope, 3 - Spring, 4 - Lift carrier, 5 - Shifting Leper 6 One gripping rope Ronila, 17 One gripping rail ,1
7a - guide surface, 18 - pressing force transmission member (movable rail),
18a - displacement side, 24 - departure acceleration device, 2 6 A - gripping section, 2 6 m - population, 2 6 n - - exit, 2
6-Passage detector (proximity switch), 26a - Handful rope machine entry detector, 26b - Handy rope machine exit detector, 27.27
A, 27B--Lock grip force detector (load cell), 28.
28A, 28B one-hand rope force determination control means, 29.29A,
29a, 29b - display device (CRT, liquid crystal display),
46--Vibration absorber, 49--Alarm device, 5-1 Emergency stop device, 52--Pulse generator, 62--Pulse counter, 65-Speed synchronization determination section, 68-Length rope force detection signal output timing Appropriateness determining unit 74 - Exit detection signal output timing appropriateness determining unit 78 - Difference appropriateness determining unit. Patent applicant: Kawatetsu Steel Construction Co., Ltd.

Claims (7)

[Claims] (1) A detacher type grip in which a gripping roller is attached to the tip of a shifting lever that conveys the lift carrier by gripping the moving towline with the elastic force of a spring and transmitting the gripping reaction force. A rigging machine entry detector is provided at the entrance and exit of the rigging section located behind the starting acceleration device for starting the lift carrier, and detects the entry of the detacher-type rigging machine, and detects the exit of the rigging machine. a grasping machine exit detector; a pushing force transmitting member disposed on a grasping rail that guides the movement of the grasping roller in the above-mentioned grasping section so as to be displaced from its guide surface; A rope grip force detector is provided on the displacement side and detects the pressing force as the rope grip roller passes; and after the rope grip machine entry detector detects that one lift carrier has entered, the rope grip Until the exit of the lift carrier is detected by the machine exit detector, the measured rope grip force based on the detection signal from the rope grip force detector is compared with a predetermined rope grip force value set in advance. The invention is also characterized by being provided with a rope grip force determination control means for determining whether the measured rope grip force is valid or not, and a display device that displays data regarding the rope grip force using a signal from the rope grip force determination control means. A rope gripping force measurement device for a detacher type rope gripping machine for a lift carrier. (2) The detacher-type rope gripping machine for a lift carrier according to claim 1, wherein the pressing force transmission member is provided with a vibration absorber that absorbs vibrations when the gripping roller passes. Grip force measuring device. (3) The rope grip force measuring device for a detacher type rope grip machine for a lift carrier according to claim 1, wherein the rope grip force detector is a load cell. (4) Two sensors are incorporated into the above load cell,
4. The rope gripping force measuring device for a detacher-type rope gripping machine for a lift carrier according to claim 3, further comprising a rope gripping force determination control means corresponding to each sensor. (5) One lift carrier is equipped with two or more detacher type rope gripping machines, and the rope gripping force determination control means has a tolerance set to a difference in the gripping force of the two or more detacher type rope gripping machines. The present invention is characterized by comprising a difference suitability determination unit that determines whether the difference is within a difference value and, when the difference is outside an allowable range, instructs the alarm device to issue an alarm and the emergency stop device to stop the movement of the lift carrier. A rope gripping force measuring device for a detacher type rope gripping machine for a lift carrier according to claim 1. (6) The rope gripping force determination control means counts the number of pulses from a pulse generator that emits pulses in conjunction with the speed of the towline when the detacher type rope gripping machine enters the rope gripping section. a detection signal output timing appropriateness determination unit that determines whether the detection signal of the detection target is output within a predetermined number of pulses, and a rope gripping machine that receives a signal from the detection signal output timing appropriateness determination unit It determines whether the rope is synchronized with the speed of the towline and whether the rope gripping machine is slipping with the towline, and in the event of speed unsynchronization or slippage, an alarm system will issue a warning and an emergency stop will be issued. The rope gripping force measuring device for a detacher-type rope gripping machine for a lift carrier according to claim 1, further comprising a speed synchronization determination unit that instructs the device to stop moving the lift carrier. (7) In claim 1, after the detacher-type rope grasping machine grasps the tow rope, it determines that the moving speed of the rope grasping roller has synchronized with the speed of the tow rope, and determines that the synchronous speed has been reached. According to another aspect of the present invention, there is provided a method for measuring a rope gripping force of a detacher-type rope gripping machine for a lift carrier, characterized in that the rope gripping force of a rope gripping roller in the pressing force transmission member is detected.