JPH0116708B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for detecting poor grip strength of a cableway, which is used in a circulation cableway.

In the circulation type cableway, the cable is looped between pulleys installed at both terminals, and the cable is stretched and circulated.
It is a means of transportation that transports people or goods by moving the rope and the rope gripping machine. There are fixed circulation cableways in which the rope is repeatedly circulated while the cable is held by a cable gripping machine, and there is a fixed circulation cableway in which the cable is repeatedly circulated while the cable is held by a cable gripping machine, and the other is a fixed circulation cableway in which the cable is held by a cable clamping machine when the carrier departs from a terminal and the cable is held by a cable gripping machine when it arrives at another terminal. There is an automatic circulation type cableway that allows the cable to be roiled, but in both cases, the carrier and the cable are connected using a cable gripping machine.

As described above, rope gripping machines are important equipment for the safety of cableway operation, and there are various types such as spring type, gravity type, screw type, or a combination of these.
Various rope gripping machines have been proposed and put into practical use in pursuit of rope gripping performance. However, even with a rope gripping machine with excellent performance, if by some chance the gripping force is poor due to long-term use or accidental causes, this will be detected and the device will prevent the rope from leaving the cableway. This is a necessary condition for the safety of cableway operation.

As one method for detecting defects in the rope gripping machine or the rope gripping force, for example, in an automatic circulation cableway, a device for testing the quality of the rope gripping machine function is installed in the forwarding path of the rope gripping machine in the terminal, and It is also done to pass this device through each cycle to determine whether it is good or bad, and then transport the rope gripping device to the departure route, grip the rope, and depart. A good rope gripping machine is based on a technical concept that assumes or expects that the rope will operate normally and generate a normal gripping force, but it does not necessarily mean that the rope gripping force will be exerted normally. It does not necessarily mean that it has been done. This is because, for example, when a rope grasping machine performs a rope grasping operation, an operation is performed that involves some operational displacement between the constituent members of the rope grasping machine, and along with this, some kind of load acts. This is because there is no guarantee that the rope gripping force will be poor due to damage to the members of the single-hand rope machine or malfunction.

Therefore, the quality of the rope gripping machine or the rope gripping force is judged to be good or bad after the rope gripping machine has completed the rope gripping, or at the final stage after the rope has passed the entire departure route and before leaving for the cableway. It is clearly desirable.

As a detection method carried out at the final stage of the departure route of such a rope gripping machine, there are, for example, the following methods that have been conventionally used for automatic circulation cableways using spring type rope gripping machines.

That is, this is a method in which a detection device 5 as shown in FIG. 1 is provided in a route section after the rope grasping machine completes rope grasping in the terminal and before it departs onto the cableway track to perform detection. The detection device 5 is disposed on a moving path along which the rope gripping machine 1 moves in the direction of arrow 3 along the rope 2, and a cantilevered detection lever 8 is pivotally mounted on a pin 7 of a fixed bracket 6. The vicinity of the tip of the detection lever 8 is elastically supported by a spring 9. Detection lever 8
An actuating piece 10 is fixed to the actuating piece 10, and a limit switch 11 is operated by the actuating piece 10. Now, when the rope gripping machine with normal rope gripping force moves in the direction of the arrow 3, the release roller 4 of the rope grasping machine 1 comes into contact with the guide surface 12 of the detection lever 8 as shown by 4a and rolls. Then, the elastic force of the spring (not shown) of the rope gripping machine 1 overcomes the spring 9, and the detection lever 8 is pushed down and passed as shown by the chain line 12a. However, when a defective rope gripping machine passes, rope gripping machine 1
The spring (not shown) cannot overcome the elastic force of the spring 9, so the release roller 4 rolls along the curve of the guide surface 12 of the detection lever 8, and the release roller 4 follows the dotted line 4b. Although the detection lever 8 is pushed up to the position shown in FIG. Since an actuating piece 10 is fixed to the detection lever 8, the actuating piece 10 operates a limit switch 11 to determine the quality of the gripping force.

In this conventional method, the pass/fail judgment is made at the final stage of the route where the rope gripping device leaves for the cableway line, but in the end, the elastic force of the spring of the rope gripping device 1 and the elastic force of the spring 9 are opposed to each other for detection. This method can be prompted by the displacement of the lever 8, but it has the disadvantage that it cannot be used for anything other than automatic circulation cableways using spring-type rope grips. Moreover, this detection method also has problems such as detection sensitivity when used for spring-type rope gripping machines, but apart from this, as mentioned above, the final detection method before the rope gripping machine departs for the cableway line. Despite the necessity and usefulness of determining whether grip strength is good or bad, a satisfactory device or method for this purpose has not yet been found.

The present invention has been made in order to improve the above-mentioned situation, and it is designed to determine the quality of the rope at a position immediately before it passes through the departure route of the rope gripping machine and departs for the cableway. A method for detecting poor rope gripping force of a cableway, which can be used not only with a rope machine but also with any type of rope gripping machine, and which can be used whether the cableway is an automatic circulation type cableway or a fixed circulation type cableway. It was made for the purpose of providing.

Corresponding to this object, the present invention provides a circular cableway in which a rope is gripped by a rope gripping machine and the rope gripping machine is moved along with the movement of the cable, in which the departure route of the rope gripping machine is operated. a pressing device that applies a resistance force to the movement of the rope gripping device by contacting the rope gripping device in a section along the rope; and a delay detection device that detects whether or not there is a delay in the movement of the rope gripping device with respect to the movement of the rope. The present invention provides a method for detecting poor rope grip strength of a cableway, characterized in that when the delay is detected, it is determined that the cable grip strength is poor using a device.

The method for detecting poor cable grip strength of a cableway according to the present invention will be explained below with reference to the drawings.

As shown in FIG. 2, the pressing device 30 is disposed along the elapsed section where the rope gripping machine 21 completes the rope gripping at the rope gripping point 27 and moves in the direction of the arrow 23 as the rope 22 moves.

The pressing device 30 is attached to a bracket 31 in a fixed position.
A pressing member 33 is pivotally mounted in a cantilevered manner through a pin 32, and a spring 34 is attached near the tip of the pressing member 33.
It was supported by

The pressing member 33 has a guide surface 35 formed of an upwardly convex curved surface on which the rope gripper 21 comes into contact and slides.
This is for applying a resistance force to the rope gripping machine 21 moving in three directions.

In the embodiment shown in FIG. 2, a protrusion 24 is formed on the rope gripping device 21 so that the protrusion 24 comes into contact with the pressing member 33. That is, when the rope gripping device 21 moves in the direction of the arrow 23, the protrusion 24 moves against the pressing member 3.
3. The guide surface 35 contacts the ascending slope 36 of the guide surface 35 and advances while sliding on the guide surface 35. That is, the protrusion position 24a shown by the chain line resists the elastic force of the spring 34 and is pushed down to the position of the guide surface 35a shown by the chain line. When this is done, the protrusion 24 of the rope gripping device 21 has a resistance force directed in the direction opposite to the arrow 23 due to the elastic force of the spring 34, that is, the movement of the rope gripping device 21. There are forces that act to prevent this. Since the rope gripping device 21 generates a gripping force by gripping the rope 22 using frictional force in the gripping part 26, when the above-mentioned resistance force acts on the rope gripping device 21, the gripping force is generated. If the cable force is poor, slippage will occur between the grip portion 26 and the cable 22. Of course, the spring 34
needs to be set so as to obtain an elastic force corresponding to the required sensitivity for detecting poor grip strength.

In this way, if the rope gripping force of the rope gripping machine 21 is poor, the rope 22
This causes a delay in the movement of the rope gripping device 21 in the direction of arrow 23 with respect to movement in the direction of arrow 23. Further, a rope gripping machine with normal rope gripping strength moves at the same speed as the rope 22 without causing the above-mentioned delay.

If the above-mentioned pressing device is provided, then if the movement of the rope gripping device 21 is compared with the movement of the rope 22 and detects whether there is a delay, it is possible to determine whether there is a poor rope gripping force. be.

The following method can be used to detect whether there is a delay in the movement of the rope gripping machine 21.

In the first embodiment, in FIGS. 3a and 3b, the pressing device 30 is
Passage detectors 40 and 41 are disposed at front and rear positions sandwiching the passageway in the middle, and the distance between the passage detectors 40 and 41 is defined as A, and A is defined as the test section 42. The passage detectors 40 and 41 use proximity switches, for example, to detect when the rope gripping machine 21 passes through the position and emit a signal. Now, if the traveling speed of the cable 22 is V, the time t required for an arbitrary point of the cable 22 to pass through the test section 43 is t=A/V. Here, the timer T
If the time t1 of the timer T is t1=t when the rope gripping device 21 passes the position of another passage detector 41 and emits a signal, the rope gripping device 21 starts measuring the time at the position of the rope 22. There is no delay in movement, therefore, there is no slippage between the rope gripping machine 21 and the cable 22, and it can be determined that the gripping force is good. If t1>t, the rope gripping machine 21 is delayed with respect to the movement of the southern line 22, and therefore, there is slipping between the rope gripping machine 21 and the cable 22,
In this case, it is determined that the rope gripping force is poor, and relay RY cuts off the power to prevent the rope gripping machine from departing into the cableway.

The delay detection device 43 using such passage detectors 40 and 41 can detect a delay in the progress of the rope grasping machine.

Further, as the delay detection device of the second embodiment, the fourth
As shown in FIGS. a and b, passage detectors 40 and 41 are disposed at positions before and after the pressing device 30 is sandwiched in the middle along the movement path of the rope gripping machine 21, and the passage detectors 4
The test section 42 is the distance A between 0 and 41, and is provided with a cable movement detector 44 that generates a pulse signal every fixed amount of movement of the cable 22. If a pulse signal is generated every L, any point on the cable 22 will be detected by the passing detector 4.
The number N of pulse signals counted using the counter C during the distance A of the test section 42 from passing the 0 position to passing the other passing detector 41 position is N=A/L. . Here, the counter C starts counting from the time when the rope grasper 21 passes the passage detector 40 position and issues a signal to the time when the counter C starts counting and passes the other passage detector 41 position and issues a signal. If the count value N1 of However, if N1>N, the rope gripping machine 21 is delayed with respect to the advancement of the cable 22, and therefore the rope grasping machine 21 does not slip between it and the cable 22. In this case, it is possible to determine that the rope gripping force is poor and to cut off the power supply using the relay RY to prevent the rope gripping machine from departing into the cableway.

Although the purpose can be achieved by using either of the first and second embodiments as the delay detection device,
The delay detection device 43 of the first embodiment can be used for cableway equipment whose operating speed is constant, and the delay detector 43' of the second embodiment can also be used for cableway equipment whose operating speed is variable. belongs to.

In the above description, the protrusion 24 is provided on the rope gripping machine 21.
is provided so that it comes into contact with the pressing member 33, but the shape of the protrusion 24 may be other than the shape shown in the drawings as long as it provides resistance to the movement of the rope gripping device 21. Instead of the protrusion 24, it is also possible to use a specific location on the main body of the rope gripping device 21 as the contact location with the pressing member 33.

In addition, if it is necessary to prevent the protrusion 24 and the pressing member 33 from coming into contact with each other, or from sliding friction or wear,
The protrusions 24 and the guide surface 35 of the pressing member 33 may be made of anti-friction material or wear-resistant material, or the protrusions 24
It is also possible within the scope of the present invention to use a roller that rolls in contact with the guide surface 35 instead, as long as it provides resistance to the movement of the rope gripping machine 21.

Furthermore, although the above description is for the case of various types of rope gripping machines in general, when applied to a cableway using a spring type rope gripping machine, the spring of the rope gripping machine is controlled instead of the protrusion. It is also possible to use a roller for gripping and releasing the rope as a contact rolling portion with the guide surface.

As described above, the method of the present invention determines whether the rope gripping force is good or bad by integrating the functions and gripping conditions of the rope gripping device near the position immediately before the rope gripping device finishes its rope gripping operation and leaves for the cableway. It is a method that allows
In addition, as long as the rope gripping device grips the rope by friction with its gripping part, it can be applied to any type of spring type, screw type, gravity type, or a combination thereof. This method is applicable to both automatic circulation cableways and fixed circulation cableways, and can contribute widely to the safe operation of circulation cableways.

[Brief explanation of drawings]

FIG. 1 is a side view illustrating a conventional method for detecting poor grip strength, FIG. 2 is a side view of a pressing device used in the method for detecting poor grip strength according to the present invention, and FIG. FIG. 3 is a side view of the first embodiment of the delay detection device used in the defect detection method; FIG. Figure a is a side view of a second embodiment of the delay detection device used in the method for detecting poor grip strength of the present invention, and FIG. It is a system diagram in an example of. DESCRIPTION OF SYMBOLS 1... Rope grip machine, 2... Rope, 3... Arrow, 4... Release roller, 4a, 4b... Release roller position, 5... Detection device, 6... Bracket, 7... Pin, 8... Detection lever, 8a... Detection lever position, 9... spring, 10...
Actuation piece, 11... Limit switch, 12... Guide surface, 21... Rope grip, 22... Rope, 23... Arrow, 2
4... Convexity, 24a... Position of convexity, 26... Grip part,
27... Gripping point, 30... Pressing device, 31... Bracket, 32... Pin, 33... Pressing member, 34... Spring,
35... Guide surface, 35a... Position of guide surface, 36
... Ascent slope, 40... Passage detector, 41... Passage detector, 42... Test section, 43... Delay detection device, 4
3'... Delay detection device, 44... Cable movement amount detector,
T...Timer, C...Counter, RY...Relay.

Claims (1)

[Claims] 1. In a circular cableway operated by gripping the rope with a rope gripping machine and moving the rope gripping machine as the cable moves, the rope gripping machine is operated in a section along the departure route of the rope gripping machine. The delay is detected by using a pressing device that applies a resistance force to the movement of the rope gripping device by abutting it, and a delay detection device that detects whether or not there is a delay in the movement of the rope gripping device with respect to the movement of the rope. A method for detecting poor grip strength on a cableway, characterized in that when the grip strength is determined to be poor when the grip strength is poor.