JP3580582B2 - Driving device for cable feeding drum - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a cable feeding drum driving device. More specifically, the present invention relates to an improvement relating to an installation workability of a driving device of a cable feeding drum used for laying cable such as an optical fiber cable.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a driving device for a cable feeding drum, for example, there is a driving device previously proposed by the present applicant as Japanese Patent Application No. 5-262003.
[0003]
The conventional cable feeding drum driving device according to the prior proposal of the present applicant is intended to automate the cable laying work instead of the manual work, and as shown in FIG. D, one roller on one side for mounting the flanges Da on both sides of D, and two rollers 1 of free rollers, a support base 2 rotatably supporting each roller 1, and a roller 1 composed of a drive roller And a rod-shaped connecting member 4 for connecting the support gantry 2 of the two rollers 1 on which the flange portion Da on one side is mounted so as to adjust the distance therebetween.
[0004]
According to the conventional cable feeding drum driving device according to the prior proposal proposed by the present applicant, the operation shown in FIG. 4 is required for installation. That is, first, as shown in FIG. 4A, the rotation axis Db of the cable feeding drum D is lifted and supported by jacks J from both sides, and a gap S is provided between the installation surface E and the cable feeding drum D. , The roller 1 and the support base 2 are positioned below the cable feeding drum D. The gap S is set to such an extent that the connection member 4 can be inserted without contacting the lower end face of the flange Da.
[0005]
Next, as shown in FIG. 4B, the rod-shaped connecting member 4 is inserted into the support base 2, and the distance W between the roller 1 and the support base 2 is adjusted by a rotating operation using a wrench or the like, and the cable is fed out. The drum D can be accurately mounted (the above is performed at the flange portions Da on both sides of the cable feeding drum D). Thereafter, as shown in FIG. 4C, the cable feeding drum D is lowered by the jack J and is supported by the roller 1.
[0006]
Next, when the driving source 3 is driven in the state shown in FIG. 4C, the cable feeding drum D rotates and the cable C is fed. The fed cable C is pulled in from the manhole opening H by a towing machine or the like and laid.
[0007]
[Problems to be solved by the invention]
In the above-described conventional drive device of the cable feeding drum according to the prior proposal of the present applicant, when connecting the roller 1, the support base 2 and the connecting member 4, the connecting member 4 is inserted after the axis L is aligned. Therefore, there is a problem that the installation work takes a very long time. Further, when the connecting member 4 is bent and deformed, there is a problem that the insertion of the connecting member 4 itself may not be possible.
[0008]
Further, since the cable feeding drum D is a heavy material of about 600 kg to about 3 t before feeding, it takes time and effort to jack up the gap S to a height at which the flange Da does not contact the connecting member 4. Was something. Moreover, since the jacks J, J on both sides support the stand up through the gap S, not only is it in an unstable state, but the connection work from this state inevitably raises concerns about work safety. Met.
[0009]
SUMMARY OF THE INVENTION The present invention has been made in consideration of such problems, and has as its object to provide a cable feeding drum drive device capable of safely performing an installation operation without taking much time.
[0010]
[Means for Solving the Problems]
In order to solve the first problem described above, a drive device for a cable feeding drum according to the present invention is a two-sided roller for supporting at least one flange portion of the cable feeding drum. A supporting frame for rotatably supporting each roller, a driving source for rotating and driving at least one roller, and a connecting member for connecting the supporting frames of the two rollers so as to be able to adjust the distance therebetween. Adopts a means characterized by comprising a cord-shaped connecting main body portion stretched between the support frames and a tension portion capable of pulling the connecting main body portion. According to a second aspect of the present invention, in the driving device for a cable feeding drum according to the first aspect, the connecting body of the connecting member is formed of a chain, and the pulling portion of the connecting member is formed of a hook on which the chain is hooked and a support base. A means is adopted, which comprises a rotating shaft that is supported and capable of screwing the hook.
[0011]
According to a third aspect of the present invention, there is provided a driving device for a cable feeding drum according to the third aspect of the present invention, wherein a driving source is individually provided for all four wheels. Means characterized by having been adopted. According to a fourth aspect of the present invention, there is provided the cable feeding drum driving device according to the first or second aspect, wherein a driving source is separately provided for each of two rollers on one side.
[0012]
[Action]
According to the above-described means, in the first aspect, the connecting member can be freely deformed in the form of a cord, so that it is not necessary to insert the connecting member in alignment with the axis, and the cord-shaped connecting member is hung on the tension portion and pulled. Thereby, the support bases can be connected to each other in a state where they are brought close to each other and the intervals are adjusted. Therefore, the cable-like connecting member is connected only by slightly raising the flange portion of the cable feeding drum. In some cases, two wheels on one side are applied to both sides of the flange portion without lifting the flange portion, and the flange is brought into a lifted state by approaching the support base as described above.
[0013]
According to the second aspect, the chain is hooked and disconnected by the hook and hook structure, and when the hook is rotated by the rotation shaft, the chain is pulled by screw feed.
[0014]
According to the third aspect, the rollers are individually driven to rotate, so that there is no difference between the torque at the time of starting the feeding of the cable and the torque at the time of braking.
[0015]
According to a fourth aspect of the present invention, in the case where the cable feeding drum is small, one flange portion is mounted by two rollers on one side, and each of the rollers is individually driven to rotate. There is no difference in torque.
[0016]
【Example】
Hereinafter, an embodiment of a driving device for a cable feeding drum according to the present invention will be described with reference to FIGS. In this embodiment, a modification is made by using most of the conventional cable feeding drum driving device according to the above-mentioned prior proposal of the present applicant.
[0017]
The roller 10 of this embodiment is made of a strong material such as steel in order to support the weight of the cable feeding drum D, and is provided with flange portions 102 on both sides of the shaft portion 101, and a drive shaft 103 on one side of the shaft portion 101. Projecting. The shaft portion 101 supports the flange portion Da of the cable feeding drum D, and has been subjected to a process such as coating with hard rubber in order to increase contact friction. The flange portion 102 is for preventing the flange portion Da of the cable feeding drum D from separating from the shaft portion 101, and protrudes in the radial direction of the shaft portion 101. The drive shaft 103 connects the drive unit 30. The roller 10 is provided with a total of four rollers, two on one side of the flange portion Da of the cable feeding drum D.
[0018]
The support base 20 is made of a strong material such as a steel material to support the weight of the cable feeding drum D and the roller 10, and has a support frame 202 erected on a base frame 201. The base frame 201 is in contact with the installation surface E, and is formed, for example, in a rectangular shape from a frame material surrounding a wide contact area for stabilizing the roller 10 supporting the cable feeding drum D. A pair of guide support shafts 203, 203 are provided on the base frame 203, and springs 204, 204 are wound around the guide support shafts 203, 203, and the support frame 202 is constantly slidably pressed toward the connection side. Even if the flange Da has some irregularities, it can be rotated without play. The support frame 202 rotatably supports the roller 10 and can be made of a strong plate. The support base 20 is provided for each roller 10.
[0019]
The drive source 30 is connected to the drive shaft 103 of each roller 10 and is driven to rotate. The drive source 30 is composed of an electric or hydraulic motor with a brake, a speed reducer, and the like. As the driving source 30, for example, when the diameter of the flange portion Da of the cable feeding drum D is 2800 mm and the diameter of the shaft portion 101 of the roller 1 is 320 mm, a motor having an output of 0.75 Kw is selected.
[0020]
The connecting member 40 connects the support frames 20 of the two rollers 10 for supporting the flange portion Da on one side of the cable feeding drum D, and is a cord-like connecting main body portion stretched between the support frames 20. The connecting body 401 includes a pulling portion 402 that can pull the connecting main body 401. The connection main body 401 is formed of a metal chain. The pulling portion 402 includes a rotating shaft 402a screwed and supported on the base frame 201 of the support frame 20 in a direction orthogonal to the axis of the roller 10 and one of the rotating shaft 402a from the base frame 201 of the support frame 20. A hook 402b fixed to the protruding end and capable of engaging with the connecting body 401, a retaining 402c for preventing the detachment of the hooked connecting body 401, which is equipped with resilient pressure on the hook 402b, and a base frame of the support base 20 for the rotating shaft 402a. And a prism portion 402d formed at the other protruding end from 201.
[0021]
According to this embodiment, the installation operation shown in FIG. 2 is performed. That is, first, as shown in FIG. 2A, the rotation axis Db of the cable feeding drum D is slightly lifted and supported by the jack J, and a small gap s is provided between the installation surface E and the cable feeding drum D. Then, the roller 10, the support frame 20, and the connecting member 40 are positioned below the cable feeding drum D. The gap s is sufficient to allow the connection main body 401 to be inserted, for example, several cm.
[0022]
At this time, the connecting member 40 can be removed from the roller 10 and the support frame 20 (the connecting body 401 of the connecting member 40 can be removed from the tension portion 402), but the connecting body 401 of the connecting member 40 is free. Since the chain can be deformed into a shape, it can be adapted in shape to storage, storage, and transportation, and damage during storage, storage, and transportation is prevented, so that the connecting member 40 is connected to the roller 10 and the support base 20. It is better to store, transport, and position it as it is. In this state, the connecting body 401 of the connecting member 40 may be loosened.
[0023]
Next, as shown in FIG. 2 (B), the torque wrench T is fitted to the prism 402d of the pulling portion 402 of the connecting member 40, and the rotating shaft 402a is rotated. The connection main body 401 is pulled to eliminate slack, and the distance W between the support bases 2 is adjusted.
[0024]
At this time, if the connection main body 401 of the connection member 40 has a large slack, the connection main body 401 is hooked on the hook 402b again to reduce the slack before the rotation operation of the rotary shaft 402a by the torque wrench T. This operation can be easily performed because the connecting main body 401 is formed of a chain. Further, even if the connecting member 40 is detached from the roller 10 and the support base 20 and connected at this time, the work is not so troublesome. Further, when it is found that the connecting main body 401 is damaged, the connecting main body 401 can be easily replaced with the hook 402b for replacement.
[0025]
Further, the pulling of the connecting body 401 by the pulling portion 402 eliminates the need for the insertion work of aligning the axis L as in the above-described conventional drive device of the cable feeding drum according to the earlier proposal of the present applicant. Therefore, the installation work can be performed in a very short time. Note that the stopper 402c provided on the hook 402b prevents the connecting main body portion 401 formed of a chain from being accidentally detached from the hook 402b that is rotationally pulled.
[0026]
Thereafter, as shown in FIG. 2C, the flange portion Da of the cable feeding drum D is supported on the shaft portion 101 of the roller 10 according to the degree of pulling.
[0027]
When the drive source 30 is driven, the shaft portion 101 of the roller 10 rotates to rotate the cable feeding drum D and to feed the cable C. The cable C that has been fed out is pulled in from the manhole H by a towing machine or the like and laid. Usually, the flange portion Da is often deformed because the cable feeding drum D is made of wood. However, since the supporting frames 202, 202 are pressed by the springs 204, 204 in an elastic state, the deformation is caused by the springs 204, 204. Is absorbed by the individual movement of the support frames 202 due to the contraction of the support frame 202. Therefore, the work of laying the cable C is automated, and the safety and efficiency of the laying work are improved. It should be noted that the jack J used in the cable C laying work by hand can be used as it is.
[0028]
In the laying operation of the cable C, since the four rollers 10 are individually driven to rotate and no torque difference is generated, the cable feeding drum D is prevented from floating from the roller 10 at the time of starting the feeding of the cable C and at the time of braking. can do. Accordingly, the rotation of the cable feeding drum D is stabilized and the efficiency is improved, and the safety and efficiency of the installation work are further improved.
[0029]
The drive unit 30 can control each rotation by a rotary encoder or the like, or can control the drive unit 30 by linking to the traction side by wire or wirelessly.
[0030]
As described above, in addition to the illustrated embodiment, the connection main body 401 of the connection member 40 may be an embodiment such as a wire rope or a belt.
[0031]
Further, an embodiment in which the pulling portion 402 of the connecting member 40 is slid and pulled may be adopted.
[0032]
Further, only one flange Da is supported by the two rollers 10 on one side, the two support bases 20 on one side, and the cord-like connecting member 40 connecting these rollers, and the other side of the flange Da is connected to the jack J. Can be a hollow state supported by. In this case, the present invention can be easily applied to a relatively small and lightweight cable feeding drum.
[0033]
Furthermore, the case where the cable feeding drum D is lifted by a small gap s has been illustrated and described, but is not intended to be limited to this. Without raising the cable feeding drum D at all, the two rollers 10 on one side of the flange portion Da on one side are applied, and are connected and pulled by the cable-like connecting member 40. Similarly, it is also possible to apply the rollers 10 and 10 to the other flange portion Da and pull the same, so that both flange portions Da can be rotatably lifted by the both-side rollers 10. In this case, it goes without saying that the cable driving drum D is supported by the jack J.
[0034]
【The invention's effect】
As described above, the driving device for the cable feeding drum according to the present invention does not require the insertion work in which the axes of the connecting members are aligned, which eliminates the need to lift the cable feeding drum and perform the installation work. In addition, there is an effect that the installation work does not take much time and the work can be performed safely.
[0035]
In addition, since the connecting member has a cord-like shape and can be freely deformed, there is an effect that storage, storage and transportation are easy.
[0036]
Further, as common to each claim, the safety and efficiency of the cable laying work can be improved by automating the cable laying work, and the jack used in the manual cable laying work can be effectively used as it is. There are effects that can be.
[0037]
Furthermore, according to the second aspect only, there is an effect that attachment and detachment of the connecting portion is facilitated by hooking the chain and the hook.
[0038]
Further, in the case of a driving roller and a free roller, the difference in torque between the two rollers prevents the cable feeding drum from floating at the time of starting the feeding of the cable and at the time of braking. This has the effect of further improving safety and efficiency.
[Brief description of the drawings]
FIG. 1 is a perspective view of a main part showing an embodiment of a cable feeding drum driving device according to the present invention.
FIG. 2 is a side view showing the installation work of FIG. 1, showing work steps in the order of (A) to (C).
FIG. 3 is an overall perspective view of an installation state showing a conventional example.
FIG. 4 is a side view showing the installation work of FIG. 3, and shows work steps in the order of (A) to (C).
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Roller 20 Support base 201 Base frame 202 Support frame 203 Guide support shaft 204 Spring 30 Drive source 40 Connection member 401 Connection main body (chain)
402 Pulling portion 402a Rotating shaft 402b Hook C Cable D Feeding drum Da Flange

Claims (4)

A two-wheel roller on one side for supporting at least one flange portion of the cable feeding drum, a support base rotatably supporting each roller, a driving source for rotating at least one roller, and a two-wheel roller A connecting member for connecting the support frames so that the distance between the support frames can be adjusted, the connecting member including a cord-shaped connecting main body portion stretched between the supporting gantry portions and a tension portion capable of pulling the connecting main body portion. Driving device for cable feeding drum. 2. The driving device for a cable feeding drum according to claim 1, wherein the connecting body of the connecting member is formed of a chain, and the pulling portion of the connecting member is a hook on which the chain is hooked and a rotating shaft supported by the support base and capable of screwing the hook. A driving device for a cable feeding drum, comprising: 3. A driving device for a cable feeding drum according to claim 1, further comprising a total of four rollers including two rollers on one side for supporting the flange portions on both sides, and a driving source provided individually for all of the four rollers. A driving device for a cable feeding drum. 3. The cable feeding drum driving device according to claim 1, further comprising two rollers on one side for mounting the flange on one side, and a driving source provided separately for the two rollers. Drive.

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