JPH0425911B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Purpose of the Invention [Field of Industrial Application] This invention solves the problem of main springs of spring-type rope grips used in automatic circulation cableways such as ropeways, ski lifts, and cargo cableways. This invention relates to a main spring failure detection device for a rope gripping machine, which detects the failure and takes 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 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 "Defect Detection of Rope Gripping Machine". There are some proposals and implementations by the Japan Agency. In these systems, when two rope gripping machines are used as a set, the distance between the two rope grasping machines is configured to be relatively displaceable, and an inspection force is applied between these two rope grasping machines. A spring is interposed for generation. 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 device is used during the operation cycle of the rope gripping machine.
Cableway safety in that it is possible to determine the quality of the main spring after the rope gripping point, when the most external force is applied to the main spring and the chance of damage occurring, and before the rope-clamping machine departs for the cableway. This is the most preferable method in terms of operation, and since the rope grasping machine has built-in inspection power, it always displays an external display after the rope grasping operation. 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 an external inspection 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 device can be used when a single rope gripping device is used, and has the feature of being able to determine the condition of the rope gripping device after the rope has been gripped. Disadvantages include the fact that pass/fail judgment can be made only when given a certain value, and that an inspection section of a predetermined distance must be set up near the starting point of the terminal for inspection.

[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 purpose of the present invention is to provide a main spring failure detection device for cableway gripping machines that does not require setting a special inspection section for determination.

(B) Structure of the Invention [Means for Solving the Problem] Corresponding to this object, the main spring defect detection device for the cableway rope gripping machine of the present invention includes a first gripping part and a second gripping part. In a spring-type rope gripping machine for an automatic circulation cableway in which a spring is used to grip a rope in cooperation with a first spring that is to generate a gripping force and a first spring that is to generate a detection force. The first spring and the second spring are configured in a series spring relationship, and between the first spring and the second spring, the A spring case that can be slid in the longitudinal direction of the first spring is interposed, and a lever having one end as a free end is connected to the spring case, and the lever between the first spring and the second spring is connected to the spring case. By expanding the position of the spring case determined by the balance with the spring to the displacement of the free end of the lever, and detecting and determining the position of the free end with a detection switch,
configured to determine whether the first spring is good or bad,
The total elastic restoring force of the second spring is set smaller than the elastic restoring force of the first spring,
The detection switch is a break-type detection switch that is disposed at a fixed position outside the spring-type rope grip machine and breaks when the free end of the lever comes into contact with it, cutting off the current. .

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

The clip block 11 has a general shape as shown in FIG. A protrusion 15 is formed at the other end and a hole 16 is bored therein. The vicinity of the casing portion 14 has a casing-like shape, and rims 17, 1 are provided inside the casing-like shape.
8, 19, 20 are formed, and the rim 18 has a hole 21.
However, the rim 19 has a hole 22, and the rim 20 has a hole 2.
3. Holes 24 are drilled respectively. Details of these shapes are shown in FIG. 3a for the rim 18 and FIG. 3b for details.
3c shows details of the rim 19, and 3c shows details of the rim 20. A protruding portion 15 and a hole 16 are formed from the rim 20 .

The shot clip 30 has the shape shown in FIG. 4, and has a hole 31 near one end, an arm 32, and a hole 33 near the other end. A grip portion 34 is formed near one end, and a protrusion 35 extends near the other end.

The details of the spring case 40 will be described later, but here we will explain its general shape. That is, as shown in FIGS. The step 42 on the outer surface of the cylindrical body is the surface that should come into contact with the rim 20 of the clip block 11, and the small diameter portion 43 is the part that should be inserted into the hole 23 of the clip block 11. A hole 44 is bored near the small diameter portion 43 into which a spring rod 50, which will be described later, is inserted therethrough.

A rope gripping machine 1 is constructed as shown in FIG. 1 using the above-mentioned clip block 11, shot clip 30, spring case 40, and other parts to be described later.

First, the pin 36 is inserted into the hole 13 of the clip block 11 and the hole 31 of the shot clip 30, and the shot clip 30 is pivotally attached to the pin 36 so as to be rotatable.

On the other hand, the small diameter portion 43 of the spring case 40 is loosely fitted into the hole 23 bored in the rim 20 of the clip block 11, and the step 42 is assembled by coming into contact with the rim 20.

The spring rod 50 has a substantially round bar shape with a step 51 formed near the middle, and one end is connected to the clip block 1.
The spring rod 50 is loosely inserted into a hole 21 drilled in the rim 18 of the spring rod 50, and is supported by being loosely inserted into a hole 44 of the spring case 40 near the other end. ing. Further, the spring rod 50 is provided with a pin 52 at one end and a pin 53 at the other end. The main spring 55 is loosely fitted onto the spring rod 50, one end of which is in contact with and locked to the step 51 of the spring rod 50, and the vicinity of the other end is loosely fitted into the inner surface of the cylindrical body 47 of the spring case 40. The other end of the spring case 40 abuts against and is locked to a step 41 of the spring case 40.

The link 60 has a long hole 61 at one end and a hole 6 at the other end.
The elongated hole 61 and the hole 33 of the shot clip 30 are connected via a pin 63 so as to be pivotable and slidable. Also, the link 6
The hole 62 at the other end of the spring rod 50 is pivotally connected to the spring rod 50 via a pin 52.

The lever 70 is connected to the protrusion 1 of the clip block 11.
5 with a pin 71, one end with a roller 72, the other end with a pin 73, and a link 74.
It is pivotally connected to. and link 74 is pin 5
The roller 72 is pivotally connected to the other end of the spring rod 50 at 3, and this roller 72 is used for gripping and releasing movements.

a hole 21 in the rim 19 of the clip block 11;
A pin 75 is inserted and fixed through the hole 24 of the rim 20, and a roller 76 is attached to the tip of the pin 75.
is pivoted.

In addition, a roller 77 is pivotally connected to the clip block 11 by a pin 78, and a roller 79 is pivotally connected to the clip block 11 by a pin (not shown). These rollers 76 and 77
The roller 79 is used to determine the attitude of the rope gripping machine 1 when it performs rope gripping and release operations at the cableway terminal. (not shown).

The above configuration describes the basic components for rope gripping of the rope gripping machine 1, and this configuration has the same basic configuration as that disclosed in, for example, Japanese Patent Application Laid-Open No. 59-223556.
The functions are almost the same.

Next, the configuration of the portion related to the main spring defect detection device 80 will be explained.

First, the general shape of the spring case 40 is as described above, but the detailed shape will be explained with reference to FIGS. 5a, b, c, and d. The spring case 40 has a substantially cylindrical basic shape, and its outer surface is formed by removing the upper and lower portions of the cylindrical outer surface 45 to form missing circular portions 46a and 46b, as shown in FIGS. 5c and 5.
As shown in FIG. d, it has the shape of a two-sided truncated circle, and a small diameter portion 43 is formed near the end via a step 42. The cylindrical inner surface has a cylindrical inner surface 47 extending from one end 47a to the step 41.
It has been perforated in the meantime. The hole 44 is located at the step 41.
It is perforated and penetrates from the to the other end 44b.
On the other hand, the stage 42 has a plurality of holes 48a, 48b...48.
h are drilled at radial positions around the hole 44. The holes 48a, 48b, .

Using such a spring case 40 and other members, the spring abnormality detection device 80 is constructed as shown in FIGS.
It is configured as shown in c. 6a is a perspective view seen from below, FIG. 6b is a side view showing the center of the spring case 40 in cross section, and FIG. 6c is a side view showing a part of the spring case 40 in cross section. be.

The small diameter portion 43 of the spring case 40 is loosely fitted into the hole 23 of the clip block 11, and the spring case 40
The step 42 abuts the rim 20. The spring rod 50 is attached to the rim 1 of the clip block 11 near one end.
The spring rod 50 is loosely inserted into the hole 21 of the spring case 40, and its other end is loosely inserted into the hole 44 of the spring case 40, so that the spring rod 50 is supported so as to be slidable in the longitudinal direction. The main spring 55 is loosely inserted into and inserted into the spring rod 50 , and a portion is loosely inserted into the cylindrical inner surface 47 of the spring case 40 , and both ends of the main spring 55 are connected to the spring rod 50 . Step 51 and spring case 40
It is restrained by coming into contact with the stage 41 of. The main spring 55 is a spring for generating a rope gripping force, and is a spring having a strong elastic restoring force necessary to generate the required rope gripping force. Although this embodiment shows a case where a bell spring is used as the main spring 55, it is also possible to use other types of springs such as a coil spring. When the main spring 55 is compressed from its freely extended state and set as described above, it presses the spring rod 50 through the step 51 and generates a gripping force through the pin 52 (not shown in FIG. 6). It is the origin.

Next, in FIG. 6c, a plurality of holes 48a, 48b, .
are interpolated in a compressed state from their free expansion state, and therefore the detection springs 81a, 81
Both ends of b, . . . 81h are in contact with the hole bottom surface 49 and the rim 20, respectively.

Here, a plurality of detection springs 81a, 81b,...8
If the total elastic restoring force of 1h is set to be smaller than the elastic restoring force of the main spring 55, and it is set so that it can be expanded only when the main spring 55 is defective, the detection spring 81a as shown in FIG. , 81b, . It is in a correct state.

Next, the missing circular portion 46b below 40 of the spring case
An actuating member 82 is fixed to the. For example, a bolt 83 or the like is used for the fixing. An oblong hole 84 is horizontally bored through the actuating member 82 .

On the other hand, a pin 85 is fixed to the side wall 41a of the clip block 11 in a horizontal cantilevered manner as shown in FIG.
A detection lever 86 with an extending portion a is pivotally mounted to be freely rotatable. The detection lever 86 also has a small-diameter pivot 87 that is horizontally cantilevered near the pin 85 position.
is fixed protrudingly. The actuating member 82 and the detection lever 86 formed in this way are shown in positions separated from each other in FIG. 6a for clarity of explanation, but when they are assembled, As shown in FIG. 6b and FIG. 6c, the pivot 87 is assembled into the elongated hole 84 of the actuating member 82 in a loosely inserted state. When the detection lever 86 is horizontally displaced in the direction shown in FIG.
a is configured to be rotationally displaced to position A or position B.

Next, another embodiment will be described which has the same basic structure and function as the main spring defect detection device 80, but which is designed to facilitate assembly and disassembly work on site.

Spring case 140 used in this embodiment
is similar in basic shape to the spring case 40 of the above embodiment, but has a shape lacking the small diameter portion 43, and the inner surface 147 of the cylinder penetrates from one end to the other end with the same diameter. A groove 164 into which a stop ring is inserted is cut in the inner surface 147 of the cylinder.
At other points, the missing circular portions 146a and 146b, the hole 1
48a, 148b...148h, hole bottom surface 149, etc. are the missing circular parts 46a, 46b,
It is exactly the same as the holes 48a, 48b,...48h, the hole bottom surface 49, etc.

Using this spring case 140, the main spring 155
Combine the bush 193 and the washer 194, and lock the outer periphery of the washer with the stop ring 195.
Furthermore, the locking member 196 is fitted onto the bush 193,
Then, the outer peripheral edge is loosely inserted into the hole 123 and locked with a stop ring 197 to assemble. In this way, the spring case 140, the washer 194, the bush 193, and the locking member 196 are integrally fixed to each other by the stop ring 195 and the stop ring 197, so that the spring case 140, the washer 194, the bush 193, and the locking member 196 are integrally fixed to each other, so that the spring case 40 is completely equivalent to the spring case 40 in the previous embodiment. It becomes a functional thing. In this case, the stop ring 197 is removed, the locking member 196 is pulled out from the hole 123, the stop ring 195 is removed, and the washer 194 is removed from the spring case 140 through the hole 123.
If the main spring 155 is removed through the hole 123, the main spring 155 can be removed through the hole 123, resulting in a structure convenient for disassembly work such as repair. Also, by performing the work in reverse order, the structure becomes convenient for assembly work.

Further, in this embodiment, an actuating member 182 is fixed to the missing circular portion 146b of the spring case 140 with, for example, bolts 183, 183. As shown in FIG. 9b, a notch 184 is formed in the actuating member 182. On the other hand, the pin 1 fixed to the side wall 114a
A detection lever 186 is pivotally attached to the detection lever 185, and a pivot 187 is fixedly extended from the detection lever 186 in a horizontal cantilevered manner, and the pivot 187 is loosely inserted into the notch 184. With this configuration, as in the previous embodiment, the main spring 1
55 is detected and the spring case 140 and the actuating member 182 are moved and displaced, the notch 184 transmits this movement to the pivot 187 and the detection lever 1
86 rotates around pin 185. However, in this case, the actuating member 182 should have a thickness necessary to prevent the pivot 187 from coming off the notch 184 even if the pivot 187 is vertically displaced due to the rotation of the detection lever 186.

The configuration of this embodiment is basically the same as that of the previous embodiment, but if configured like this embodiment, even when the detection lever 186 is assembled to the pin 185, the bolt 138 is removed and the operating member 182 is disassembled downward, the pivot 187 can be removed directly from the notch 184, which facilitates disassembly for office work, and also facilitates assembly by operating in reverse. is obtained.

[Operation] First, the basic operation of the rope gripping machine 1 equipped with the main spring defect detection device of the present invention will be explained.

The structure and operation of the basic part of the rope gripping machine 1, which lacks the main spring defect detection device 80, are described in Japanese Patent Application Laid-Open No. 59-223556, "Automatic circulation type cableway rope gripping machine", which was previously published. It is almost the same as that described in .

First, FIG. 1 shows a state in which the rope gripping machine 1 has gripped the rope 2.

The spring rod 50 is inserted through the hole 21 of the rim 18 of the clip block 11 and the hole 44 of the spring case 40, and is supported so as to be slidable in the longitudinal direction of the spring rod 50. In this embodiment, the main spring 55 is a combination of a plurality of plate springs, which are loosely inserted into and extrapolated from the spring rod 50.
It is compressed from the free expansion state, and both ends are inserted between step 51 and step 41. . The small diameter portion 43 of the spring case 40 is loosely fitted into the hole 23 of the rim 20 of the clip block 11, but the elastic restoring force of the main spring 55 pushes it in the direction of the arrow 88a, causing the step 42 and the rim 20 to separate. They are in contact with each other without any gaps.

On the other hand, the spring rod 50 is connected to the link 60 by the pin 52.
The link 60 is connected to the shot clip 30 via an elongated hole 61 and a pin 63.
Since the shot clip 30 is pivotally attached to the clip body 11 by the pin 36, the elastic restoring force of the main spring 55 causes the spring rod 50 to move toward the arrow 88b.
This force is transmitted to the link 60 via the pin 52, and further transmitted to the pin 63 from one end face of the elongated hole 61, so that the shot clip 30 rotates about the pin 36 in the direction of the arrow 91a. exert the power to

As a result, the grip portion 12 of the clip body 11
and the grip portion 34 of the shot clip 30 are connected to the cable 2.
The rope is gripped by firmly clamping it.

The case shown in FIG. 1 shows a case where the main spring 55 is normal, and the free end 86a of the detection lever 86 of the main spring defect detection device 80 is in the A position as described later.

Next, with reference to FIG. 2, the case where the rope gripping machine 1 is in a free-rope mode will be explained.

When the rope gripping machine 1 grips the rope 2 and travels along the cableway track and arrives at the terminal (stop), rollers 7 are attached to the rails (not shown) installed in the terminal.
7. The rollers 79 and 76 are introduced and move forward while rolling, and a rail (not shown) that presses down the rollers 72 moves the lever 70 from the state shown in FIG. rotate in the direction. As a result, the spring rod 50 is slid in the direction of the arrow 88a via the pin 73, the link 74, and the pin 53, and the main spring 55 is moved by the step 51.
It is further compressed and displaced than the state shown in FIG.
Moreover, when the link 60 is also moved and displaced via the pin 52 due to the displacement of the spring rod 50 in the direction of the arrow 88a, the pin 63 of the shot clip 30 is moved.
is separated from any end face within the elongated hole 61 and is in a "backlash" state in which it can freely move within the elongated hole 61.
When the rope gripping machine 1 moving through the terminal in this state enters a section provided with a guide rail (not shown) that pushes up the protrusion 85 of the shot clip 30 from below the rope gripping machine 1, the pin 63 is inserted into the elongated hole. Since the shot clip 30 can be freely displaced without being restrained within the link 61, the shot clip 30 rotates about the pin 36 in the direction of the arrow 91b, and stops when the arm 32 of the link 60 comes into contact with the lower end 17b of the rim 17. do. After reaching this state, when the pressure of the roller 72 is terminated, the main spring 55 expands again from the compressed state, presses the stage 51, and moves the spring rod 50 toward the arrow 88.
The pin 63 is slid in the direction b, and the pin 63 comes into contact with one end surface within the elongated hole 61. This state is shown in FIG. 2, and in this state the pin 63
The center of is above the straight line (dead center position) connecting the center of the pin 36 and the center of the pin 52, and the link 60 is in contact with the lower end 17a of the rim 17, so the elastic restoring force of the main spring 55 As a result, this state is stably maintained, and the grasping part 34 of the shot clip 30 is maintained in a state in which it is distanced from the other grasping parts 12, that is, in a free-roaming state, and the cable 2 is free-roaming.

The case of FIG. 2 also shows a case where the main spring 55 is normal, and the detection lever 86 of the main spring failure detection device 80
The free end 86a of is also in position A, as will be described later.

A suspension device (not shown) is pivotally connected between the rim 19 and the rim 20 of the pin 75 to suspend the carrier.

The above explanation of the operation is an explanation of the basic operation of the rope gripping machine, and in the case of FIG. 1 and FIG. However, the operational relationship that generally holds true even if the main spring failure detection device 80 is not provided is described.

Next, the operation of the main spring defect detection device 80, which is the main part of the present invention, will be explained.

FIG. 1 shows the rope gripping machine 1 in the rope gripping state as described above.
The operation of this device in the gripped state will be explained using the following. This is because the cable gripping machine 1 grasps the cable 2 at the starting position in the terminal and detects a malfunction in the main spring just before departing onto the cableway, and if there is any abnormality, the departure is prevented. This corresponds to this.

In FIGS. 1 and 6b, the main spring 55 maintains a normal elastic restoring force, and the main spring 55
The step 42 is in contact with the rim 20 without any gap, and the step 51 is pressed in the direction of the arrow 88b.
It is the source of grip force. The spring case 40
An actuating member 82 is fixed to the lower notched portion 46b, for example, with bolts 83, 83, etc., and an elongated hole 84 is formed in the horizontal direction with the end extending. On the other hand, a pin 85 is fixed to the side wall 14a of the clip block 11, and a detection lever 86 having a free end 86a is pivotally attached to the pin 85. A pivot 87 is fixed to the boss of the detection lever 86 at a position relatively near the pin 85 and extends horizontally in a cantilevered manner, and the pivot 87 is loosely inserted into the long hole 84. has been done. With this configuration, if the spring case 40 is displaced laterally, the actuating member 82 also moves in the direction of the arrow 88a or the arrow 88.
Since the pivot 87 is restrained in the elongated hole 84, the detection lever 86 rotates around the pin 85, and the free end 86a moves in the direction of the arrow 89a or 8.
It is oscillatingly displaced in the direction 9b. The reason why the hole in the actuating member 82 is a long hole 84 with a longer diameter in the vertical direction is that the rotation of the detection lever 86 indicates that the pivot 8
This is to absorb the vertical displacement of the position 7 without any problem.

On the other hand, as shown in FIGS. 5b, c, d and 6c and described above, the spring case 40 has a plurality of holes 4.
8a, 48b,...48h are bored, and the hole bottom surface 49 and the rim 2 are formed in the holes 48a, 48b...48h.
0, a plurality of detection springs 81a, 81b...81
h is compressed from a freely extended state and inserted and loosely inserted. Detection springs 81a, 81b...81
h are in a parallel spring relationship with each other, and the detection springs (group) that constitute the parallel springs and the main spring 55 are in a series spring relationship. As mentioned above, the total elastic restoring force of the detection springs 81a, 81b...81h is determined to be smaller than the elastic restoring force of the main spring 55, so the main spring 55 has a normal elastic restoring force for gripping the rope. In the case where the detection springs 81a, 81b...81h have a total restoring force that cannot be expanded even if it opposes the elastic restoring force of the main spring 55, the step 42 is not spaced in the rim 20. They remain in contact.

Therefore, the actuating member 82 is also at a position closer to the arrow 88a direction, the detection lever 86 is rotating in the arrow 89b direction, and the free end 86a is at the A position.

Now, if the detector 100 is placed at a position corresponding to point B on the ground side of the terminal passing position of the rope gripping machine 1 at the departure point of the terminal, as shown in Fig. 6 b and c, then
Since the free end 86a of the detection lever 86 is in the A position, it passes through without coming into contact with the detector 100, thereby determining that the main spring 55 of the rope gripping device 1 is normal, and preventing the cable from reaching the cableway. It allows departure.

Next, a case where the main spring 55 of the rope gripping machine 1 is defective will be explained with reference to FIGS. 7a and 7b.

In FIG. 7a, the rope gripping machine 1 is in the rope gripping state as in the case of FIG. 1, but the main spring 55
A defective portion 55a has occurred. The figure shows a case where a bell spring is used as the main spring 55 and one of the bell springs breaks and falls, but there are other defects in the main spring when a coil spring is used. There are cases where permanent distortion occurs due to coil breakage or repeated use of the spring over time. Even in such a case, even if the remaining elastic restoring force of the main spring allows the rope to be gripped, the anti-slip force of the gripping rope is insufficient and it is dangerous for operation.

In such a case, as shown in FIGS. 7a and 7b, the detection springs 81a, 81b, . Displaced, step 42
A gap 90 is created between the rim 20 and the rim 20. At the same time, the actuating member 82 is also displaced in the direction of the arrow 88b, so the elongated hole 84 transmits this movement to the pivot 87.
The detection lever 86 is rotated about the pin 85 in the direction of the arrow 89b, and the free end 86a is displaced from the A position to the B position.

At the position corresponding to point B on the ground side of the rope-handling machine passing position at the departure point of the terminal,
If the detector 100 is arranged as shown, the free end 86a will come into contact with the detector 100 when the rope gripping machine 1 passes through the position. For example, the detector 100 may be a limit switch or a break-type detection switch that breaks and cuts off the current when the object to be detected collides with it (for example, (Japanese Patent Application Laid-Open No. 18873/1989)). It is possible to determine that the main spring 55 of the rope gripping machine 1 is defective, cut off the electric circuit for safety of cableway operation, stop the operation, and prevent the rope gripping machine 1 from departing to the cableway track.

The above description of the operation is for the case where a spring failure is determined in a state where the rope gripping machine 1 is gripping the rope. In actual cableway operation, when the rope gripping machine performs the rope gripping operation, a dynamic load is applied to the main spring 55, so there is a high chance of damage when the main spring is old, and the cable gripping machine is at the terminal. It is most necessary and effective for the safe operation of the cableway to perform such a quality determination of the main spring just before the cable is gripped and set off.

However, in addition to this, if there is already a malfunction in the main spring when there is a rope gripping machine on the forwarding line or detention siding line in the terminal, this will be inspected and determined before the rope is gripped, and the group of rope gripping machines in operation will be It is also of significance to remove it from the ground and make necessary repairs;
The main spring failure detection device of the present invention is also effective in such cases.

Although FIG. 2 shows a state in which the rope gripping machine 1 is roping, even in the roping state, for example, the main spring 55
If there is a defect in the spring rod 50, the remaining elastic restoring force of the main spring 55 moves the step 51 of the spring rod 50 toward the arrow 88.
When pressed in the b direction, the center of the pin 63 of the link 60 moves upward from the straight line connecting the center of the pin 36 and the center of the pin 52, and the arm 32 of the link 60 is in contact with the lower end 17a of the rim 17, so this state is maintained stably. In such a case, the detection springs 81a and 81b are
...The elastic restoring force of 81h exceeds the elastic restoring force of the main spring 55 and expands, displacing the spring case 40 in the direction of the arrow 88b, and the free end 86a of the detection lever 86 takes the B position, and as in the previous case. Detectors 100 are installed at necessary locations along the forwarding line or detention line within the terminal to determine pass/fail. In this case, a warning indicating failure can be displayed using a colored light or a buzzer.

Furthermore, if there were a case where the main spring 55 was severely defective, in this case, the arm 32 of the link 60 would no longer be able to move from the rim 17 due to the elastic restoring force of the main spring 55.
However, in this case, naturally, the detection spring 81
The elastic restoring forces of a, 81b, .
It can be detected by

(c) Effects of the Invention The main spring defect detection device for a rope gripping machine of the present invention has a relatively simple configuration and is capable of determining the quality of the main spring for a rope gripping machine. It greatly contributes to safe operation.

(a) Conventional main spring defect detection device (for example,
-70966 “Cableway gripping machine”, Utility Model Application Publication No. 59-187560 “Defect detection mechanism for rope gripping machine”, etc.)
Detection is performed by using the relative displacement of one pair of rope grippers, and it is effective as long as two rope grippers are used as a set, but cannot be used when one rope gripper is used. Nakatsuta. However, since the present invention is provided for each rope gripping machine,
Either one or a combination of rope gripping machines can be used.

(b) The device of the present invention can not only determine the quality of the main spring in the gripping state, but also
It can also be used to determine whether the main spring is good or bad in the wandering state.

(c) The device of the present invention does not indicate the quality of the main spring only when or after applying an external testing force to the rope gripping machine, but the testing force source is built into the rope gripping machine. Since the main spring is in constant operation, the defect is immediately indicated to the outside by the positional displacement of the detection lever from the moment a main spring defect occurs. Therefore, the quality of the main spring can be visually determined at any time not only by automatic detection using a detector but also by visual inspection of the exterior.

(c) Although the embodiments of this specification are described in the case of a cable gripping machine for an automatic circulation type cableway, the device of the present invention is not limited to this case, and as long as it is a spring type cable clamping machine, It can also be used in fixed circulation type rope gripping machines, and the main spring type can also be used not only as a bell spring but also as a coil spring or other type.

[Brief explanation of drawings]

Fig. 1 is a partially cross-sectional side view of a rope gripping machine equipped with the main spring failure detection device of the present invention in a rope gripping state, and Fig. 2 is a side view showing a partially sectional view of a rope gripping machine equipped with the main spring failure detection device of the present invention. Fig. 3a is a side view showing a part of the clip block in a sectional view, Fig. 3b
3c is a partially sectional front view of the clip block at the rim 18 position, FIG. 3c is a partially sectional front view of the clip block at the rim 19 position, and FIG. A front view partially shown in cross section at the rim 20 position;
Figure 4 is a side view of the shot clip, Figure 5a is a cross-sectional side view of the spring case, Figure 5b is a plan view of the spring case in cross-section, and Figure 5c is the back of the spring case. Figure 5d is a perspective view of the spring case, Figure 6a is a perspective view of the main spring defect detection device, seen from below, and Figure 6b is a perspective view of the main spring when it is normal. Fig. 6c is a side view showing the main spring defect detection device in a sectional view at the main spring position, and Fig. 6c shows the main spring defect detection device in a sectional view at the main spring position and the detection spring position when the main spring is normal. A side view, FIG. 7a is a side view, partially shown in cross-section, when the main spring is defective in the rope grasping state of the rope gripping machine equipped with the main spring failure detection device of the present invention, FIG. 7b 8 is a side view showing a main spring defect detection device in a cross-sectional view at the main spring position and the detection spring position when the main spring is defective, and FIG. 8a is a side view showing a cross-sectional view of a spring case in another embodiment. 8b is a plan view showing a cross-sectional view of a spring case in another embodiment, and FIG. FIG. 9B is a side view shown in cross-section, and FIG. 9B is a bottom view showing the relationship between the actuating member and the detection lever in another embodiment. DESCRIPTION OF SYMBOLS 1... Rope grip machine, 2... Rope string, 11... Clip block, 12... Clasp part, 13... Hole, 14...
...Casing part, 14a... Side wall part, 15... Protrusion part,
16...hole, 17...rim, 17b...lower end,
18...Rim, 19...Rim, 20...Rim, 2
1...hole, 22...hole, 23...hole, 24...
Hole, 30... Shot clip, 31... Hole, 3
2...arm, 33...hole, 34...grip part, 35...
...protrusion, 36...pin, 40...spring case,
41... stage, 42... stage, 43... small diameter part, 44
... hole, 44a ... other end, 45 ... cylinder outer surface,
46a, 46b... missing circular portion, 47... cylinder inner surface,
47a...one end, 48a, 48b...48h...
Hole, 49... Hole bottom, 50... Spring rod, 51
...Ran, 52...Pin, 53...Pin, 55...
Main spring, 60... Link, 61... Long hole, 62...
...hole, 63...pin, 70...lever, 71...
Pin, 72...Roller, 73...Pin, 74...
Link, 75...pin, 76...roller, 77...
...Roller, 78...Pin, 79...Roller, 80
...Main spring defect detection device, 81a, 81b...81
h...detection spring, 82...operating member, 83...bolt, 84...long hole, 85...pin, 86...detection lever, 86a...free end, 87...pivot, 88a, 88b... Arrows, 89a, 89b...
...Arrow, 90...Gap, 91a, 91b...Arrow, 92a, 92b...Arrow, 100...Detector, 111...Clip block, 114...Housing section, 114a...Side wall section, 118... Rim, 1
20...Rim, 121...Hole, 123...Hole, 1
40...Spring case, 145...Cylinder outer surface, 14
6a, 146b... missing circular part, 147... cylindrical inner surface, 148a, 148b... 148h... hole, 14
9... Hole bottom surface, 150... Spring rod, 151...
...Ran, 152...Pin, 153...Pin, 155
... Main spring, 164 ... Groove, 180 ... Main spring defect detection device, 182 ... Operating member, 183 ... Bolt, 184 ... Notch, 185 ... Pin, 18
6...Detection lever, 186a...Free end, 187
...Pivot, 193...Button, 194...
Watshiya, 195...Stop spring, 196...
...Locking member, 197...Stop spring, A...
Position, B...position.

Claims (1)

[Claims] 1. In a spring-type rope gripping machine for an automatic circulation cableway in which a first gripping part and a second gripping part cooperate to grip a cable with a spring, the spring generates a gripping force. a first spring that should generate a detection force, and a plurality of second springs that should generate a detection force, the first spring and the second spring being configured in a series spring relationship,
A spring case that can be slid in the longitudinal direction of the first spring is interposed between the first spring and the second spring, and the spring case has one end that is a free end. levers connected to each other, the position of the spring case determined by the balance between the first spring and the second spring is expanded to the displacement of the free end of the lever, and the position of the free end is detected by a detection switch. By detecting and determining the quality of the first spring, the total elastic restoring force of the second spring is set to be smaller than the elastic restoring force of the first spring. The detection switch is a break-type detection switch that is disposed at a fixed position outside the spring-type rope grip machine and breaks when the free end of the lever comes into contact with it, cutting off the current. Main spring failure detection device for cableway gripping machines.