JPH0425910B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Purpose of the Invention [Field of Industrial Application] This invention relates to a main spring of a spring-type rope gripping device used for an automatic or fixed circulation cableway such as a ropeway, ski lift, or cargo cableway. The present invention relates to a method for detecting defects in the main spring of a rope gripping machine, for detecting defects and taking measures such as stopping the operation of the cableway.

[Prior art] A circulating cableway is a cable that is stretched and circulated endlessly between pulleys installed at terminals at both ends.
Transportation is carried out by attaching or attaching a rope gripping device with a suspended carrier, and there are various types of rope gripping devices used for this, such as spring type, gravity type, and screw type.
Currently, spring-type rope grips are most commonly used due to their reliability.

The built-in main spring of a spring type rope gripping machine is the most important component as it is the source of the rope gripping force.Especially in automatic circulation type cableways, the main spring is attached and detached every time the rope gripping machine moves, Since the springs are frequently subjected to dynamic repetitive loads, the condition of the main springs is an important issue that directly relates to the safe operation of the cableway.

In response to this, various main spring failure detection methods and devices have been proposed and put into practice.

For example, an inspection load is applied to the main spring of a rope gripping machine that is in a terminal and is in a free-roaming state using an appropriate pressing means from the outside, and if the deflection of the main spring is larger than a certain value, then A device is used to determine if the spring is defective. However, with this device, although it is possible to determine whether the main spring of the rope gripping machine is in the free-roping state, it is not possible to detect the quality of the main spring in the rope-holding state. Furthermore, since the testing force is applied from outside of the rope gripping device by the pressing means, it is possible to determine whether the main spring is good or bad only when the rope gripping device is in the position of the inspection device.

On the other hand, cable gripping machines with a built-in inspection force generation source are disclosed in Japanese Utility Model Application No. 57-70966 "Cableway Gripping Machine" and Japanese Utility Model Application No. 59-187560 (Japanese Utility Model Application No. 187-187).
No. 82730) "Defect Detection Mechanism for Rope Grip Machine" was proposed and implemented. In these,
When two rope gripping devices are used as a set, the distance between the two rope gripping devices is configured to be relatively displaceable, and a spring for generating an inspection force is installed between these two rope gripping devices. This is an intervening method. When gripping the rope, pull the two rope gripping machines toward each other and grip the rope with the test spring flexed. If the main spring is normal, this state will be maintained even after the rope gripping operation. However, if the main spring is defective, the restoring force of the inspection spring will overcome the gripping force of the main spring, causing sagging between the rope and the grip, causing the two gripping devices to move away from each other. Therefore, this movement is converted into a height displacement of the detection roller, and this is detected to perform discrimination.

This method or device operates after the rope gripping point during the operating cycle of the rope gripping machine, when the most external force is applied to the main spring and the chance of damage occurring, and before the rope gripping machine leaves for the cableway. This is the most preferable method for safe cableway operation in that it allows you to determine whether the main spring is good or not.Also, since the cable gripping machine has built-in inspection power, it is always displayed externally after the cable gripping operation. It has characteristics. However, since this device utilizes mutual displacement between two rope gripping machines, it cannot be used when two rope gripping machines are used in combination.

Next, as for the case where two rope gripping devices are used without combining two rope gripping devices, JP-A No. 60-94864 ``Method for detecting poor gripping force of a cableway'' and JP-A No. 60-94863 ``Method for detecting poor gripping force of a cableway'' are disclosed. There is a method proposed and implemented by "Failure Detection Device". This device applies external detection force to the rope grasping machine after the rope grasping operation, and
This system generates a pulse signal proportional to the amount of movement of the rope and counts the number of pulses while the rope grip machine passes through an inspection section of a certain distance. If it is defective, there will be a delay in the movement of the rope gripping machine relative to the amount of movement of the cable.
When the pulse count exceeds a predetermined value, it is determined whether the main spring or the grip force is good or bad.

This method or device can be used when a single rope gripping device is used, and has the feature of being able to determine the state of the rope gripping device after the gripping device is used. Disadvantages include the fact that pass/fail judgment can only be made when an external force is applied to the test, and that an inspection section of a predetermined distance must be set up near the starting point of the terminal for the test.

[Problems to be solved by the invention] This invention was made to improve the above-mentioned situation, and it is possible to solve the problem regardless of whether only one spring-type rope grip machine is used or when two spring-type rope grip machines are used in a set. It can be used even in the rope gripping machine, and can determine whether the main spring is good or bad when the rope gripping machine is in the gripping state.If necessary, it can also be used to determine the quality of the main spring when it is in the freeing state. By having a built-in force generation source, even if an external force is not applied to the inspection, if a main spring defect occurs, it will immediately be displayed externally from the moment it occurs, and the display will be maintained. The object of the present invention is to provide a method for detecting a main spring defect in a cableway gripping machine that does not require setting a special inspection section for determination.

(B) Structure of the Invention [Means for Solving the Problem] Corresponding to this objective, the main spring failure detection method of the cableway rope gripping machine of the present invention is provided by In a cableway spring-type rope gripping machine that grips a cable with a spring in cooperation with a first spring that generates a gripping force and a single or single spring that generates a detection force, The first spring and the second spring are configured in a series spring relationship, and the first spring and the second spring are arranged in a series spring relationship.
An intermediate floating member is interposed between the first spring and the second spring, and the positional displacement of the intermediate floating member determined by the balance between the first spring and the second spring is determined. It is characterized by determining the quality of the product.

Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.

FIG. 1 explains an embodiment of the method for detecting a defective main spring of a rope gripping machine according to the present invention.

In FIGS. 1a and 1b, an embodiment of a fixed rope gripping machine 1 is shown. In FIG. 1a, the main body 2 has a hook-shaped tip to form a first grip 3 for holding the cable 16, and has a diagonal line extending toward the rear wall 2a. It has a shape in which the applied portion and a region 2b curved by a curve from point A to point C of the rear wall portion 2a through the vicinity of point A are integrally formed.

The rod 4 has a second end on which the cable 16 is to be pressed.
It is a slender member forming a grip 5 and having a flange 6 at the other end. Springs 7 and 8 are interposed in series between the flange 6 and the rear wall 2a of the main body 2, and a spring case 9 is inserted between the springs 7 and 8 as an intermediate floating member in the direction of the arrow 10a or 10b. These two springs 7, 8 are movably interposed
separating the two. A protrusion 11 protrudes below the spring case 9.

The lever 12 is rotatably pivoted near its middle by a pin 14 fixed to the main body 2 as a fulcrum, and one end is pivoted to a pin 13 fixed to the protrusion 11 of the spring case 9. , the tip forms a free end 15.

Here, the spring 7 is a strong spring that has the necessary elastic restoring force to generate the gripping force,
On the other hand, as the spring 8 for detection, a spring having a smaller elastic restoring force than the spring 7 is used.

FIG. 1a shows a case where the spring 7 is in a normal state, but the first grip 3 and the second grip 5 cooperate with each other due to the elastic restoring force of the spring 7. The rope is gripped by firmly holding and pressing the cable 16. Here, as mentioned above, the elastic restoring force of the spring 8 is set smaller than that of the spring 7, so the spring 7 contributes to gripping the cable 16 and moves the spring case 9 toward the arrow 10a. As a result, the spring 8 is pressed into full contact or almost full contact.

Therefore, the spring case 9 takes a position moved in the direction of arrow 10a, and the pin 13 also moves in the direction of arrow 1.
The lever 12 moves in the 0a direction, and the lever 12 then touches the pin 14.
It rotates around the center in the direction of arrow 17a, and the free end 15 is
It becomes a state of being in position.

[Operation] Here, it is assumed that the detector 18 is fixedly installed at position B at a predetermined detection location on the ground side. Now, the fixed rope gripping machine 1 grips the rope 16 and removes the rope 1.
Assuming that along with the movement of 6, it advances from the spine of the paper toward the front of the paper at right angles to the paper surface of the drawing,
Since the free end 15 of the lever 12 is in the A position, it is allowed to pass the detector 18 fixed on the ground side in the B position without coming into contact with it, and thereby the spring of the rope gripper is activated. 7 can be detected as normal.

FIG. 1b shows a case where the spring 7 is defective and the gripping force is not sufficient.

If the spring 7 is defective, for example, there is a breakage point 7a and the spring 7 does not have the required elastic restoring force, the above configuration will allow the spring 7 to maintain its elasticity until it is balanced with the remaining elastic restoring force of the defective spring 7. 8 expands, and along with this, the spring case 9 also moves in the direction of the arrow 10b. Therefore, the lever 12 rotates about the pin 14 in the direction of the arrow 17a, and the free end 15 assumes the position B.

In this state, the fixed rope gripping machine 1
As the cable 16 moves, the cable 16 moves from the back of the paper to the front of the paper at right angles to the plane of the drawing, and at the detection point, the detector 18 fixed at position B on the ground and the free end 15 will be in contact with it.

The detector 18 includes, for example, a limit switch,
If a breakable type switch or the like that is disconnected in the event of a collision is used, it is possible to open a safety electric circuit, stop the operation of the cable 16, and detect a spring failure in the fixed rope gripping device 1.

If the distance between the pin 14 and the free end 15 is set larger than the distance between the pin 13 and the pin 14, the spring case 9
The minute displacement is greatly expanded at the free end 15 position.

[Other Embodiments] Fig. 2 explains another embodiment of the main spring failure detection device for a rope gripping machine according to the present invention. It is.

In Figures 2a and 2c, the main body 22 has a first grip 23 at one end and a rear wall 24 at the other end, as shown in more detail in Figure 2c. The rear wall portion 24 has a hole 25 into which a rod 33 (described later) is guided, a hole 26 into which a closing portion 36 of a spring case 35 (described later) is loosely inserted, and a pin 29 (described later), a pin It is made by fixing 45.

The second grip 27 is pivotally connected to the main body 22 by a pin 29 and is rotatable about the pin 29. A grip part 28 projects downward and extends from the pin 29 in a substantially horizontal direction. The protruding end portion is pivotally connected to a link 31 with a pin 30. The other end of the link 31 is pivotally connected to a rod 33. Rod 33
The rod 3 is loosely inserted through the hole 25 of the main body 22.
It is slidable in the longitudinal direction of the spring case 3, and is shaped like a round bar with a step 34. The spring case 35 is loosely inserted through a hole 38 of a spring case 35, which will be described later, and extends outward.

The basic shape of the spring case 35 is a cylindrical shape with a flange, and one end is open and the other end is a closed part 36.
The step 37 abuts the main body 22 and the hole 26 of the main body 22
It is loosely inserted inside. A hole 38 through which the rod 33 is loosely inserted is bored in the closing portion 36.

The spring case 35 has flanges 39a, 39.
b extends outward from the cylinder and is fixed, and the flange 3
Near 9b is a protrusion 4 to which a pin 46 (described later) should be fixed.
0 is formed.

The spring 41 is for generating an elastic restoring force for gripping the cable 50, and is interposed between the step 34 of the rod 33 and the closing part 36 of the spring case 35. The plurality of springs 43a and 43b are for detection, and the spring 43a is connected to the flange 39a.
and the rear wall 24, and the spring 43b is inserted between the flange 39b and the rear wall 24. Therefore, the spring 43a and the spring 43b are configured in parallel with each other, and the spring 41 that contributes to the rope gripping machine and the spring group for detection consisting of the springs 43a and 43b configured in parallel. is rod 3
A spring case 35 is slidably inserted between the step 34 of No. 3 and the rear wall portion 24 of the main body 22 to form a series spring structure. Here, the spring 41 is a spring having a large elastic restoring force that should contribute to the gripping force, and on the other hand, the combined elastic restoring force of the parallel spring group consisting of the springs 43a and 43b is the elastic restoring force of the spring 41. Set it to be smaller than the restoring force. on the other hand,
The lever 44 is pivotally connected to the main body 22 with a pin 45 and to the projection 40 with a pin 46, and has a free end 47. The lever 44 is rotatable about a pin 45 as the spring case 35 moves laterally.

FIG. 2a shows the spring 41 in its normal state, and the elastic restoring force of the spring 41 presses the step 34 of the rod 33 and presses the second grip 27 via the pin 32, link 31, and pin 30. Then, the second grip 2
7 applies a force in the direction of rotation in the direction of arrow 48 about the pin 29, and thus the first grip 23 and the second grip 27 work together to firmly grip the cable 50. are doing.

And, at this time, the spring 41 is connected to the stage 3 as described above.
4 and at the same time press the closing part 3 of the spring case 35.
6 is also pressed, but since the spring 41 is in a normal state and maintains a normal elastic restoring force, the spring group consisting of the plurality of springs 43a and 43b in parallel is connected to the flanges 39a and 39a. 39b, so that the spring case 35 is pressed in the direction of arrow 49a such that the step 37 contacts the rear wall 24, and the springs 43a, 43b are pressed against the flange 39a or 39b and the rear wall. 24, it is compressed to a state of full contact or almost full contact and is in equilibrium.

The spring case 35 and the pin 46 are the most aligned with the arrow 4.
Since the lever 44 is located in the direction 9a, the lever 44 rotates about the pin 45 in the direction of the arrow 51a, and the free end 47 is in the position C.

Here, it is assumed that the detector 52 is fixedly installed at a position D at a predetermined detection location on the ground side. Now, the automatic circulation type rope gripping machine 21 grips the rope 50 and removes the rope 5.
Assuming that the lever 44 moves from the back of the paper toward the front of the paper at right angles to the paper surface of the drawing,
Since the free end 47 is at the C position, it is allowed to pass through the detector 52 fixed on the ground side at the D position without coming into contact with it. 41 is normal.

FIG. 2b shows a case where the spring 41 is defective and the grip force is not sufficient.

Assume that the spring 41 is defective, for example, there is a broken portion 41a, and the spring 41 does not have the required elastic restoring force. Even in this case, the spring 41 is often
Due to its residual elastic restoring force, the rod 3
By pressing 3, the first grip 23 and the second grip 27 are gripping the cable 50 as described above, and it appears that the spring is good or not. Although it is often not possible to tell, the grip on the rope is not strong enough, and if the train continues to operate as it is, it will slip and be dangerous. In this state, spring 4
1 presses the step 34 and the closing portion 36 of the spring case 35 as described above, but since the elastic restoring force is reduced, the spring group consisting of the springs 43a and 43b is , expands until it is balanced with the remaining elastic restoring force of the spring 41, and the spring case 35 moves in the direction of the arrow 49b. Therefore, the lever 44 rotates about the pin 45 in the direction of the arrow 51b, and the free end 47 assumes the position D.

In this state, it is assumed that the automatic circulation type rope grasping machine 21 grasps the cable 50 and as the cable 50 moves, it moves from the back of the paper toward the front of the paper at right angles to the plane of the drawing. , D on the ground at the detection point
The detector 52 fixed at the position comes into contact with the free end 47. If the detector 52 is the same as in the previous embodiment, it is possible to detect a spring failure in the automatic circulation type rope gripping device 21.

Here, if the distance between the pin 45 and the free end 47 is set larger than the distance between the pin 46 and the pin 45, even a minute displacement of the spring case 35 will be greatly expanded at the position of the free end 47.

The above describes the case where the quality of the spring 41 is detected in the gripping state of the automatic circulation type rope gripping machine 21. , the automatic circulation type rope grasping machine 2
Even in the wandering state of No. 1, a spring failure can be detected if necessary.

What is shown in FIGS. 3a and 3b is the same automatic circulation type rope gripping machine 21 as shown in FIGS. 2a and 2b.
The automatic circulation type rope gripping machine 21 is an automatic type rope gripping machine that can grip and release the rope 50, and in order to change the rope from the gripping state shown in FIG. The pin 53 of the rod 33 is removed in a suitable manner, e.g.
arrow 54 with a radial lever (not shown) connected to 3.
Apply force once in the direction and move it, and at the same time press pin 3.
If the pin 30 is momentarily lightly pressed in the direction shown by the arrow 55 near the 0 position, the pin 30 will move upwardly beyond the imaginary straight line 56 connecting the centers of the pins 29 and 32, and will be fixed to the main body 22. When the link 31 comes into contact with the stopper 57, the second grip 27 moves away from the first grip 23 and remains open even if the force applied in the direction of the arrow 49b is no longer applied. Inside the automatic circulation cableway stop,
The automatic circulation type rope gripping machine 21 is placed in a free-roping state as shown in FIG.

Even in such a case where the spring wanders, a defective spring can be detected if necessary, and this will be explained with reference to FIGS. 3a and 3b.

In FIG. 3a, the spring 41 in its normal state is at step 34.
The step 34 is pressed by the elastic restoring force, and the link 31 is inserted between the stopper 57 and the stopper 57.
The grip 28 of the second grip 27 is moved away from the first grip 23, and the open state is maintained. Since the elastic restoring force of the spring 41 is in a predetermined normal state, the combined elastic restoring force of the springs 43a and 43b is
Unable to resist the elastic restoring force of the spring 41, the step 37 of the spring case 35 comes into contact with the rear wall 24, and the springs 43a and 43b are in full or almost full contact. Therefore, the free end 47 of the lever 44 is moved in the same manner as in FIG.
takes position E. Now, if the detector 58 is fixedly installed on the ground side at the F position at the detection point in the forwarding section of the stop, the automatic circulation type rope grasping machine 21 that is forwarded and passes through this point will be able to reach the free end 47 of the lever. passes through without contacting the detector 58, and the spring 41 is determined to be good.

FIG. 3b shows a case where the spring 41 is defective and has a broken part 41a, for example, but due to the remaining elastic restoring force of the spring 41, the link 31 comes into contact with the stopper 57, and the first grip Child 23 and second handshake 27
The space between the handle and the grip 28 is open. However, as in the case of FIG. 2b, the springs 43a and 43b extend until they are balanced with the remaining elastic restoring force of the spring 41, and the spring case 35 moves in the direction of the arrow 49b, and the lever 44 is centered around the pin 45. The free end 47 rotates in the direction of the arrow 51b and takes the F position. As a result, the spring comes into contact with the detector 58 at the detection point during forwarding operation, and it can be determined that the spring of the automatic circulation type rope gripping machine 21 is defective.

(C) Effect of the invention As described above, according to the present invention, the spring-type rope gripping device can be used either with one piece or in a set of two, and the grip of the rope gripping device can be improved. It is possible to determine the quality of the main spring in the rope condition, and if necessary, it is also possible to determine the quality of the main spring in the rope condition, and it can be inspected by having an inspection force generation source built into the rope gripping machine. Even without applying external force, if a main spring failure occurs, it can be immediately indicated externally from the moment it occurs, and the indication can be maintained.
Furthermore, it is possible to obtain a method for detecting a defect in the main spring of a cableway gripping machine that does not require setting a special inspection section for determining the quality of the main spring.

[Brief explanation of drawings]

FIG. 1 is an explanatory longitudinal cross-sectional view showing a rope gripping machine used when carrying out a method for detecting a defective main spring of a cableway rope gripping machine according to an embodiment of the present invention, and FIG. 1a shows a state in which the main spring is in good condition. , FIG. 1b shows a condition in which the main spring is defective. FIG. 2 is an explanatory longitudinal cross-sectional view showing a rope gripping device used when implementing a main spring detection method for a cableway rope gripping device according to another embodiment of the present invention, and FIG. Condition, Fig. 2 Main spring is defective, 2nd
Figure c shows the main body of the rope gripping machine. Fig. 3 is a vertical cross-sectional explanatory view showing the state of the main spring detection device of the cableway rope gripping machine shown in Fig. 2 when the main spring is free. The spring indicates a bad condition. DESCRIPTION OF SYMBOLS 1... Fixed rope grip machine, 2... Main body, 2a... Rear wall part, 2b... Area, 3... First grip, 4...
Rod, 5...Second grip, 6...Flange, 7
...Spring, 7a...Broken point, 8...Spring, 9...
...Spring case, 10a, 10b...Arrow, 11...
...Protrusion, 12...Lever, 13...Pin, 14...
...Pin, 15...Free end, 16...Cable, 17
a, 17b...arrow, 18...detector, A, B...
...Position, 21...Automatic circulating rope gripping device, 22...Main body, 23...First grip, 24...Rear wall portion, 25
... Hole, 26 ... Hole, 27 ... Second grip, 28
...Handshake, 29...Pin, 30...Pin, 31...
...link, 32... pin, 33... rod, 34
... Stage, 35 ... Spring case, 36 ... Obstruction part,
37... Step, 38... Hole, 39a, 39b... Flange, 40... Protrusion, 41... Spring, 41a...
...Broken part, 43a, 43b...Spring, 44...
Lever, 45...pin, 46...pin, 47...
Free end, 48...Arrow, 49a, 49b...Arrow, 50...Cable, 51a, 51b...Arrow, 5
2...Detector, 53...Pin, 54...Arrow, 5
5...Arrow, 56...Virtual straight line, 57...Stopper, 58...Detector.

Claims (1)

[Scope of Claims] 1. In a cableway spring-type rope gripping machine in which a first gripping portion and a second gripping portion cooperate to grip a cable by means of a spring, the spring Consisting of a first spring that should generate a rope force and a single or plural second springs that should generate a detection force, the first spring and the second spring are configured in a series spring relationship. At the same time, an intermediate floating member is interposed between the first spring and the second spring, and the intermediate floating member is determined by the balance between the first spring and the second spring. By determining the positional displacement, the first
A method for detecting failure of a main spring of a cableway rope gripping machine, characterized by determining whether the spring is good or bad. 2. A detection lever having one end as a free end is connected to the intermediate floating member, and the positional displacement of the intermediate floating member is expanded to the pivot displacement of the free end and exposed to the outside. A method for detecting a main spring failure of a cableway rope gripping machine according to item 1.