JPH1137224A - Rope terminal device and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the reduction of a crimping force by a long term use by crimp and fixing a rope consisting of a core rope and plural strands to the rope socket after inserting to the hollow part of a rope socket and arranging around a metal core rod at the part positioning in the hollow part of the rope. SOLUTION: A hollow part 21c is provided in a rope socket 21a which is a main body of the rope terminal device for an elevator and the end of the rope 3 is inserted in this hollow part 21c and crimp and fixed. The rope 3 is constituted by twisting plural strands 3a together around a hemp core 3b, but the part positioning in the hollow part 21c of this rope 3 is arranged around the metal core rod 22, while removing the end of the hemp core 3b. This core rod 22 is formed by a metal with a lower hardness than the strand 3a. The end part of the rope 3 is crimp and fixed to the rope socket 21a by inserting the end part of the rope 3, on which the core rod 22 is arranged, in the hollow part 21c and compressing and plastically deforming the rope socket 21a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rope terminal device used for, for example, an elevator or the like and a method for manufacturing the same.

[0002]

2. Description of the Related Art FIG. 12 is a block diagram showing a conventional rope terminal device for an elevator disclosed in Japanese Patent Laid-Open No. 4-66490. In the figure, a thimble rod 2 penetrates a fixed portion 1 such as a car, a counterweight or a girder beam. The thimble rod 2 is integrally provided with a rope socket 2a and a screw portion 2b. Rope socket 2
The end of the rope 3 is fixed to a. Screw part 2b
, A spring seat 5 is inserted, and a nut 6 and a lock nut 7 are screwed. Spring seat 5 and fixed part 1
, A spring 4 is interposed.

[0003] Further, as shown in FIG.
A plurality of strands 3a formed by twisting a plurality of strands are twisted around a fiber cord core, that is, around a hemp core 3b. In general, in the rope 3 for an elevator that is repeatedly bent, a hemp core 3b, which has less internal damage due to friction with the strand 3a, is used as a cord.

When connecting the end of the rope 3 to the rope socket 2a, first, as shown in FIG. 14, the strand 3a at the end of the rope 3 is unraveled and bent, and the hemp core 3b at that portion is cut. I do. Thereafter, the end of the rope 3 is inserted into the rope socket 2a, and the molten Babbitt metal 8 is poured from the hole 2c of the rope socket 2a and hardened. FIG. 15 is a perspective view showing a connection portion between the rope socket 2a and the rope 3 in FIG.

FIG. 16 shows, for example, Japanese Patent Application Laid-Open No. 53-458.
It is a lineblock diagram showing other examples of the conventional rope terminal device for elevators indicated in No. 51 publication. In this example, by compressing and plastically deforming the cylindrical connecting fitting 11 into which the end of the rope 3 is inserted, a crimping force is generated by the action / reaction force between the rope 3 and the connecting fitting 11, Rope 3
Are crimped and fixed to the connection fitting 11. A screw groove is provided on the outer peripheral portion of the connection fitting 11 after compression, and a pair of nuts 12 and 13 are screwed thereto.

[0006]

Among the conventional rope terminal devices configured as described above, in the case of fixing the rope 3 using the babbitt metal 8, the end of the rope 3 is unraveled and the strand 3a is disengaged. Since it is necessary to be straight and then bent, a great deal of labor is required, and the processing time is long. In addition, the rope 3 is connected to the connection fitting 1
In the method of crimping and fixing to 1, the rope 3 can be fixed more easily than in the case of using the babbitt metal 8, but when used for a long time, the crimping force is reduced due to settling of the hemp core 3b of the crimped portion. I will.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and can easily fix a rope to a rope socket by crimping and prevent a decrease in crimping force due to long-term use. And a method for manufacturing the same.

[0008]

According to a first aspect of the present invention, there is provided a rope terminal device comprising a rope socket having a hollow portion, a mandrel, and a plurality of strands twisted around the rope. And a rope crimped and fixed to the rope socket.In the part located in the hollow part of the rope, the end of the cord is removed, and a metal core rod having a lower hardness than the strand is centered. It is what is arranged.

[0009] The rope terminal device according to the invention of claim 2 is:
The end of the core rod on the rope insertion port side of the hollow portion is located inside the hollow portion from the rope insertion port, and the end of the cord is located inside the hollow portion.

[0010] The rope terminal device according to the invention of claim 3 is:
The first to check the position of the rope when inserted into the hollow part
And a second window for confirming the position of the rope after crimping are provided on the rope socket at intervals in the longitudinal direction of the hollow portion.

[0011] According to a fourth aspect of the present invention, there is provided a rope terminal device.
An elongated hole-shaped window extending in the length direction of the hollow portion for checking the position of the rope at the time of insertion into the hollow portion and after crimping is provided in the rope socket.

According to a fifth aspect of the present invention, there is provided a rope terminal device,
A core rod is projected from a strand at the tip of a rope in a hollow portion.

The rope terminal device according to the invention of claim 6 is
The hollow portion is a through hole.

[0014] According to a seventh aspect of the present invention, there is provided a rope terminal device.
A thread groove is formed on the outer periphery of the rope socket, and a connection portion for connecting to another rope socket is provided at an end of the rope socket.

In the method for manufacturing a rope terminal device according to the present invention, the strand at the end of the rope is unraveled and the end of the cord is removed, and the portion where the cord is removed has a lower hardness than the strand. Arranging a metal core rod and twisting the strand again, inserting the end of the rope on which the core rod is arranged into the hollow part of the rope socket, compressing the rope socket, and attaching the end of the rope to the rope socket; And a step of fixing the portion by pressure bonding.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing an elevator rope terminal device according to Embodiment 1 of the present invention, and FIG.
FIG. 3 is a cross-sectional view of the rope socket of FIG.
It is an I line sectional view.

In the figure, a thimble rod 21 penetrates a fixed part 1 such as a car, a counterweight or a girder beam. The thimble rod 21 is integrally provided with a rope socket 21a and a screw portion 21b. The rope socket 21a is provided with a hollow portion 21c, into which the end of the rope 3 is inserted and fixed by crimping. The rope socket 21a has a hollow portion 21c.
A first window 21d for confirming the position of the rope 3 at the time of insertion into the rope, and a second window 21e for confirming the position of the rope 3 after the crimping are formed in the longitudinal direction of the hollow portion 21c. They are provided at intervals.

The threaded portion 21b of the rope socket 21 has
The spring seat 5 is inserted, and the nut 6 and the lock nut 7 are screwed. The spring 4 is interposed between the spring seat 5 and the fixed part 1. As shown in FIG. 13, the rope 3 is configured by twisting a plurality of strands 3a each formed by twisting a plurality of strands around a fiber cord, that is, around a hemp core 3b. ing. Generally, in an elevator rope 3 that has many repeated bends,
Hemp core 3 with less internal damage due to friction with the strand 3a
b is used as the cord.

Further, in a portion of the rope 3 located in the hollow portion 21c, the end of the hemp core 3b is removed, and a metal core bar (round bar) 22 is disposed at the center. Core rod 22
Is a metal having a lower hardness than the strand 3a, for example, SS
400 (mild steel). Further, the end 22a of the core rod 22 on the rope insertion opening 21f side of the hollow portion 21c.
Is located inside the hollow portion 21c with respect to the rope insertion opening 21f, and the end of the hemp core 3b abutting on the core rod 22 is located inside the hollow portion 21c.

Next, a method of fixing the rope 3 to the rope socket 21a, that is, a method of manufacturing a rope terminal device will be described. First, the strand 3a at the end of the rope 3 is loosened, and the end of the hemp core 3b is cut by a predetermined length and removed. Next, the core rod 22 is inserted into the portion where the hemp core 3b has been removed, and the strand 3a is twisted again. Thereafter, the end of the rope 3 on which the core rod 22 is disposed is connected to the rope socket 2.
1a is inserted into the hollow portion 21c. Then, the rope socket 21a is compressed and plastically deformed.
The end of the rope 3 is fixed by crimping on a. At this time, the rope socket 21a is compressed in the inner diameter direction by, for example, a press machine, then rotated by 90 degrees and compressed again in the inner diameter direction. The outer shape of the rope socket 21a after pressing is as follows.
The shape is not particularly limited, and may be a circle, a square, a hexagon, or the like.

In such a rope terminal device, since the rope 3 is crimped and fixed to the rope socket 21a without using the babbit metal, the fixing work of the rope 3 is relatively easy. Moreover, the core rope of the crimping portion to the rope socket 21a is made of a metal core rod 2 that is less sagging than the hemp core 3b.
Rope 3 and rope socket 2
It is possible to prevent the press-fitting force due to the action / reaction force with the first member 1a from being reduced by long-term use.

The material of the core rod 22 is the strand 3a.
If the hardness of the wire is about 1/3 of that of the material of the element wire and the rope socket 21a, the rope 3 is not damaged, and the outer peripheral portion of the core rod 22 is formed of the strand 3a as shown in FIG. It can enter the space between the lines and sufficiently secure the crimping force due to the action / reaction force between the rope 3 and the rope socket 21a. Furthermore, the rope socket 21
Except for the crimped part to a, hemp core 3b
Is used, so that internal damage due to repeated bending when used as an elevator rope is prevented.

Further, the end 22a of the core rod 22 is retracted into the hollow portion 21c, and the hemp core 3b is slightly inserted into the hollow portion 21c from the rope insertion opening 21f. Even if a load is applied to the rope 3 in the bending direction at the portion, the strand 3a is not damaged by the core rod 22.

Also, the rope socket 21 is compressed by the compression process.
a extends in the longitudinal direction, and accordingly, the hollow portion 2
The end of the rope 3 in 1c also moves in the same direction, but the rope socket 21a has a second window 2 in addition to the first window 21d.
Since 1e is provided, it can be confirmed even after crimping that the tip of the rope 3 is sufficiently inserted into the hollow portion 21c.

Embodiment 2 In the above example, the second window 21e is provided to confirm the position of the rope 3 after crimping. However, as shown in FIG. 4, for example, a long hole-shaped window extending in the length direction of the hollow portion 21c. 21g may be provided, and the position of the rope 3 at the time of insertion into the hollow portion 21c from the window 21g and after crimping may be confirmed.

Embodiment 3 FIG. In the above example, the core rod 2
Although the length of the rope 2 is made equal to the length of the strand 3a, for example, as shown in FIG. 5, the core rod 22 may be projected from the strand 3a at the tip of the rope 3. Thereby, rope 3
It can be confirmed that the core rod 22 is inserted into the end of the rope 3 even after the rope 3 is crimped.

Embodiment 4 Next, FIG. 6 is a front view showing a rope terminal device according to Embodiment 4 of the present invention, FIG. 7 is a side view of FIG. 6, and FIG. 8 is a bottom view of FIG. In the first embodiment, the rope socket 21a is connected to the thimble rod 2
1, the rope socket 23 is divided from a thimble rod (not shown) in this example. The rope socket 23 has a hollow portion 23a, which is a through hole into which the rope 3 is inserted, and a connecting portion 2 for connecting the thimble rod.
3b.

In such a rope terminal device, the hemp core 3b at the end of the rope 3 is replaced with the core rod 22 and then the rope 3 is crimped and fixed to the rope socket 23, as in the above-described examples. . At this time, since the hollow portion 23a is a through hole, the insertion state of the core rod 22 can be easily checked from the lower part of the rope socket 23 even after the rope 3 is crimped.

Embodiment 5 Next, FIG. 9 is a front view showing a rope terminal device according to Embodiment 5 of the present invention.
FIG. 10 is a side view of FIG. 9. In this example, rope socket 2
A thread groove 24a is machined on the outer periphery of 4 and a connecting portion 24b for connecting to another rope socket is provided at the end of the rope socket 24. Here, the other rope socket is a rope socket 2 of a type in which the rope 3 is fixed with babbit metal, as shown in FIG.
5

In such a rope terminal device, the hemp core 3b at the end of the rope 3 is replaced with the core rod 22, and then the rope 3 is crimped and fixed to the rope socket 24, similarly to the above examples. . After the rope 3 is crimped, the thread groove 24a is formed.
The rope socket 24 is attached to the fixed portion 1 by screwing nuts 6 and 7 into the screw grooves 24a.

Here, for example, the rope 3 of the elevator is
Since elongation occurs due to aging, it is necessary to cut the rope 3. At this time, the rope socket 24 of the type that crimps the end of the rope 3 cannot perform the cutting operation on site. For this reason, when performing the cutting operation, another rope socket 25 for fixing the rope 3 using babbit metal is used.

As described above, when another rope socket 25 is used, the rope socket 24 of this embodiment has the thread groove 2.
Since the 4a and the connecting portion 24b are provided, as shown in FIG. 11, the crimp-type rope socket 24, which is unnecessary at the site, can be used as a thimble rod as it is.

In each of the above examples, a rope terminal device for an elevator is shown, but the present invention can be applied to a rope terminal device used for other purposes.

[0034]

As described above, in the rope terminal device according to the first aspect of the present invention, when the rope is crimped and fixed to the rope socket, the end of the cord is removed from the portion located in the hollow portion of the rope. Since the metal core rod having a lower hardness than the strand is disposed at the center, the rope can be easily fixed to the rope socket by crimping, and a decrease in the crimping force due to long-term use can be prevented.

In the rope terminal device according to the second aspect of the present invention, the end of the core rod on the rope insertion port side of the hollow portion is positioned inside the hollow portion with respect to the rope insertion port, and the end of the cord is inserted into the hollow portion. The strand is not damaged by the core rod even if a load is applied to the rope in the bending direction at the rope insertion port.

According to a third aspect of the present invention, there is provided a rope terminal device for confirming the position of the rope at the time of insertion into the hollow portion, and a second window for confirming the position of the rope after crimping. Are provided at intervals in the length direction of the hollow portion of the rope socket, so that it can be confirmed even after crimping that the tip of the rope is sufficiently inserted into the hollow portion of the rope socket.

According to a fourth aspect of the present invention, the rope socket is provided with a slot-like window extending in the length direction of the hollow portion for confirming the position of the rope after insertion into the hollow portion and after crimping. Therefore, it can be confirmed after crimping that the tip of the rope is sufficiently inserted into the hollow portion of the rope socket.

In the rope terminal device according to the fifth aspect of the present invention, since the core rod is projected from the strand at the tip of the rope, it is confirmed that the core rod is inserted into the end of the rope even after the rope is crimped. be able to.

In the rope terminal device according to the sixth aspect of the present invention, since the hollow portion is formed as a through hole, the inserted state of the core rod can be easily checked from the lower portion of the rope socket even after the rope is crimped.

In the rope terminal device according to the present invention, since a thread groove is formed on an outer peripheral portion of the rope socket and a connecting portion for connecting with another rope socket is provided at an end portion of the rope socket. The socket can be used as a thimble rod.

In the method for manufacturing a rope terminal device according to the present invention, the strand at the end of the rope is unraveled and the end of the cord is removed, and the metal having a lower hardness than the strand is formed at the portion where the cord is removed. Arranging a core rod made of steel, twisting the strands again, inserting the end of the rope on which the core rod is arranged into the hollow part of the rope socket, compressing the rope socket, and attaching the end of the rope to the rope socket. The method includes a step of crimping and fixing the rope, so that the rope can be easily crimped and fixed to the rope socket, and a decrease in the crimping force due to long-term use can be prevented.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a rope terminal device for an elevator according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the rope socket of FIG. 1;

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a configuration diagram illustrating a rope terminal device according to a second embodiment of the present invention.

FIG. 5 is a configuration diagram showing a main part of a rope terminal device according to a third embodiment of the present invention.

FIG. 6 is a front view showing a rope terminal device according to Embodiment 4 of the present invention.

FIG. 7 is a side view of FIG. 6;

8 is a bottom view of FIG.

FIG. 9 is a front view showing a rope terminal device according to a fifth embodiment of the present invention.

FIG. 10 is a side view of FIG. 9;

FIG. 11 is a front view showing another method of using the rope socket of FIG. 9;

FIG. 12 is a configuration diagram illustrating an example of a conventional rope terminal device for an elevator.

FIG. 13 is a cross-sectional view of the rope of FIG.

14 is a perspective view showing a state before connecting the rope of FIG. 12 to a rope socket.

FIG. 15 is a perspective view showing a connection portion between the rope socket and the rope in FIG. 12;

FIG. 16 is a configuration diagram showing another example of a conventional rope terminal device for an elevator.

[Explanation of symbols]

3 rope, 3a strand, 3b hemp core (core cord),
21a, 23, 24 rope socket, 21c, 23a
Hollow, 21d first window, 21e second window, 21f
Rope insertion port, 21g window, 22 core rod, 24a screw groove, 24b connection part, 25 other rope sockets.

Claims (8)

[Claims] 1. A rope socket having a hollow portion, a rope having a mandrel and a plurality of strands twisted around the rope, and being inserted into the hollow portion and crimped and fixed to the rope socket. In a portion of the rope located in the hollow portion, an end of the cord is removed, and a metal core rod having a lower hardness than the strand is disposed at the center. Terminal device. 2. The end of the core rod on the rope insertion port side of the hollow portion is located inside the hollow portion with respect to the rope insertion port, and the end of the cord is located inside the hollow portion. The rope terminal device according to claim 1, wherein 3. The rope socket has a first window for confirming the position of the rope when inserted into the hollow portion, and a second window for confirming the position of the rope after crimping. The rope terminal device according to claim 1, wherein the rope terminal device is provided at intervals in a length direction of the portion. 4. The rope socket is provided with a slot-like window extending in the length direction of the hollow portion for confirming the position of the rope when inserted into the hollow portion and after crimping. The rope terminal device according to claim 1 or 2, wherein 5. The rope terminal device according to claim 3, wherein a core rod protrudes from the strand at a tip portion of the rope in the hollow portion. 6. The rope terminal device according to claim 1, wherein the hollow portion is a through hole. 7. The rope socket according to claim 1, wherein a thread groove is formed on an outer peripheral portion, and a connecting portion for connecting to another rope socket is provided at an end portion of the rope socket. The rope terminal device according to any one of claims 1 to 6. 8. A step of unraveling the strand at the end of the rope and removing the end of the cord, disposing a metal core bar having a lower hardness than the strand at the portion where the cord has been removed, Re-twisting, inserting the end of the rope on which the core rod is disposed into the hollow portion of the rope socket, and compressing the rope socket, and crimping and fixing the end of the rope to the rope socket. A method for manufacturing a rope terminal, comprising: