JP2528992B2 - Cable basket and crane - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable basket with a cable storage device for storing a cable for supplying power to a crane hanging device or the like.

[Conventional technology]

The cable basket installed on the crane's suspension is
Consists of an enclosure that houses the cable and a conical and cylindrical core that is placed inside it, so that when the hoist is wound up, the incoming cable will be naturally wrapped around the core by its own weight and twist. It has become.

Further, as disclosed in Japanese Utility Model Application Laid-Open No. 64-12084, a cable guide that rotates in one direction with respect to the center axis of the cable guide is provided, and the cable is forcibly wound.

Although a torque motor is adopted as a rotary drive source for the cable guide in this device, a method of obtaining a rotational force by another drive source such as a spiral spring has also been proposed.

[Problems to be Solved by the Invention]

Of the above-mentioned conventional techniques, the former works without problems when the lifting speed of the lifting device is slow, but when the lifting speed is fast, the cable is not wound in one direction and the cable becomes irregularly wound in the basket, As a result, there has been a problem that the cable does not enter the basket, and the phenomenon of protruding from the basket occurs at the upper part.

The latter technique is to solve the former problem,
Since the cable is wound while pressing it with the cable guide, if the cable is tightly wound around the core or the rotation speed of the cable guide cannot follow the winding speed of the cable,
There was a problem that the cable became irregularly wound in the basket, and when it was unwound, the cable became entangled with the cable guide, leading to a cable cutting accident. That is, this problem occurs when the ascending speed becomes higher.

An object of the present invention is to provide a cable basket with a cable storage device that can prevent winding or irregular winding of a cable around a core in the cable basket.

[Means for solving the problem]

A feature of the present invention is that a cable guide for winding, which is rotatably installed between an entrance to a cable basket and a storage space for winding a cable, is provided for a cable guide between the entrance and the storage space. It is provided so as to substantially follow the spiral shape.

[Action]

Since the cable guide for winding the cable is arranged as described above, even if the cable is fed into the cable basket at a high speed, the cable does not buckle and acts so that it can be regularly stored along a certain track. .

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

The cable basket 20 is installed on the upper surface of a hanging tool that is hung with a rope from a moving body such as a trolley of a crane. The cable 15 for power supply and the like is suspended from the moving body.

The cable basket 20 has a cylindrical core 21 having an upper conical shape, a cylindrical lower enclosure (first enclosure) 22 surrounding the core 21, and is bolted onto the cylindrical core 21 to form a truncated cone at the upper end. It is composed of a cylindrical upper enclosure (second enclosure) 23 and a plurality of ring-shaped guides 24 provided below the upper end.
The core 21, the upper enclosure 23, the lower enclosure 22, and the guide 24 are arranged concentrically. The outer circumference of the cylindrical portion of the core 21 and the surrounding enclosure
Between the inside of the vertical part of 22,23, the storage part 29 of the cable 15
Has become.

A rotating shaft 30 is installed at the center of the core 21. Rotary axis 30
Is driven by the drive device 35. As is well known, the drive device 35 rotates the rotary shaft 30 when winding the cable 15 toward the cable storage space 29 (when raising the suspending device), and the cable 15 is taken out when the suspending device descends. Reversed by force. The drive device 35 is composed of a torque motor and a spiral spring.

At the lower end of the rotary shaft 30 protruding above the core 21, a large cable guide 40 for winding a cable is installed with a radius so as to be above the conical portion 21a of the core 21, and above that, a small cable guide 41. , 42 are installed on the rotary shaft 30 (two in this embodiment). The cable guides 40, 41, 42 are spiral paths for the cable 15 from the cable storage space 29 to the entrance (guide 24) of the upper enclosure 23 (optimal storage path for cables).
It is placed on top. In practice, the large cable guide 40 serves as a reference, so that the small cable guides 41 and 42 are arranged on the spiral path. That is, as is clear from FIGS. 1 and 2, the upper guide has a smaller radius of rotation than the lower guide. In addition, a lower guide is provided so as to be located rearward of an upper guide in the rotation direction of the rotating shaft 30 when the cable is wound.

The cable guides 40, 41, 42 are ring-shaped, and the cables 15 pass through the holes. The hole diameter of the cable guide 40 in the rotation direction is larger than the hole diameters of the small cable guides 41 and 42.

As shown in FIG. 3, the cable guides 40, 41 and 42 have a part 40a of the ring which is rotatable outwardly about a pin 40b, through which the cable 15 is inserted. Then fix it with pin 40c.

The rotary shaft 30 has cable guides 40, 41, 42 along the axial direction.
Many mounting holes are provided. As a result, the mounting positions of the upper small cable guides 41, 42 are adjusted to optimal positions.

In the above-described configuration, when the hanging tool descends from the upper limit of the lift, the cable 15 is pulled out from the storage portion 29 in the counterclockwise direction. At this time, the cable guides 40, 41, 42 are pushed counterclockwise by the cable 15, and the rotary shaft 30 is rotated counterclockwise.

Next, when the lifting device rises, the cable 15 is pushed by the cable guides 40, 41 and 42 by the clockwise torque generated by the drive device 35, and the twist of the cable 15 itself is also assisted to store the cable basket 21 clockwise. Part 29 is rolled up.
Therefore, it is possible to prevent the cable 15 from being buckled in the enclosure 23 and not being stored in the storage space 29 even when the suspending tool is lifted at a high speed.

The vertical distance between the small cable guide 41 and the large cable guide 40 is set so that the cable 15 does not buckle during the lifting of the lifting device at high speed.

The optimal storage path of the cable 15 is that the cable does not buckle in the cable basket 20, even at a high winding speed,
Therefore, a route that does not cause random winding, and this route can be found by adjusting the positions of the cable guides 41 and 42.

In this embodiment, there are two groups of the large cable guide 40 and the small cable guides 41, 42, but another cable guide is provided between the large cable guide 40 and the group of small cable guides 41, 42. It may be provided. The location of this additional cable guide is on the optimal storage path for the helix.

The inner diameters of the small cable guides 41, 42 are about three times the diameter of the cable 15. The large cable guide 40 has a shape (large diameter) with a margin in the rotation direction so that it can follow the winding amount of the storage space 29 and the like.

Since the guides 24 have the same diameter and are arranged in multiple stages,
Make up a cylindrical passage for 15. Therefore, to prevent the cable 15 from protruding outside the cable basket 20,
It acts to give the cable 15 linearity.

The cable guides 41 and 42 are provided close to each other, and substantially form a group. Therefore, even if the cable 15 contacts the cable guide 41 or 42, the bending radius of the cable 15 becomes large, and the cable 15 is not bent at a small radius and can be wound well. The cable guide 40 may also be composed of two rings like the cable guides 41 and 42.

By applying a lubricant to the cable 15 and the cable guides 40, 41, 42, the storability can be improved.

Since excessive twisting of the cable 15 causes irregular winding, the twisting is preferably performed about the number of windings around the core 21.

The cable basket with a storage device is wound around the core 21 when the hoisting speed is low when the storage part 29 is multi-rowed, and is stored on the sides 22 and 23 by centrifugal force when the hoisting speed is low. There is a difference and the twist of the cable changes, and it becomes a random winding. This problem can be solved by forming the storage portions 29 in one row as in this embodiment.

According to this embodiment, it is possible to prevent irregular winding due to buckling of the cable and disengagement from the cable basket.
It is possible to prevent a cable cutting accident due to the cable getting caught in the cable guide.

The embodiment shown in FIG. 4 shows another embodiment of the small cable guides 41, 42, which is a tubular member 45. The large cable guide 40 may also be formed of such a tubular member.

The number of cable guides in each of the above-mentioned embodiments is three or two, but may be multiple or may be composed of one member from the upper part to the lower part.

〔The invention's effect〕

According to the present invention, since the cable can be stored in the cable basket even at a high hoisting speed, the cable cutting accident can be prevented, and the cargo handling efficiency can be significantly improved.

[Brief description of drawings]

1 is a vertical sectional view of a cable basket according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line 2-2 of FIG. 1, FIG. 3 is an enlarged view of a large cable guide, and FIG. It is a longitudinal cross-sectional view of an embodiment of a small cable basket. 15 …… Cable, 20 …… Cable basket, 21 ……
Wick, 22,23 …… Enclosure, 24 …… Guide, 29 …… Storage part, 3
0 …… Rotary axis, 35 …… Drive unit, 40 …… Large cable guide, 41,42 …… Small cable guide

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shoji Maruyama 794, Higashitoyoi, Kudamatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi, Ltd. Kasato Business Co., Ltd. (56) Bibliography Actual Kaihei 2-69688 (JP, U)

Claims (8)

(57) [Claims] 1. A substantially cylindrical cable storage space whose axial direction is directed vertically, and a conical shape provided at the upper end of a first enclosure forming the outside of the cable storage space and having a small diameter upward. And a cable guide for winding the cable in contact with the cable, the cable guide being provided in the second enclosure so as to be rotatable around the axis of the cable storage space. Drive for
In the cable basket, the cable guide includes a first cable guide provided on an upper side in the second enclosure and a second cable guide provided on a lower side in the second enclosure. , The second cable guide is provided radially outside of the first cable guide, and is provided rearward of the first cable guide in the cable winding direction when viewed from the axial direction. That is, a cable basket. 2. The cable basket according to claim 1, wherein the upper end portion of the second enclosure has the same diameter and a predetermined height in the vertical direction. 3. The cable basket according to claim 1, wherein the first cable guide and the second cable guide have holes for passing cables. 4. The cable basket according to claim 3, wherein the second cable guide has a hole diameter in the rotation direction larger than the hole diameter in the radial direction. 5. The cable basket according to claim 3, wherein the desired ones of the first and second cable guides are cylindrical. 6. The cable basket of claim 3 wherein the desired one of said first and second cable guides comprises two vertically spaced cable guides, the lower cable guide being the upper cable guide. Be provided behind the guide in the direction of rotation during winding,
A cable basket featuring. 7. The cable basket according to claim 3, wherein the space between the core forming the storage space and the first enclosure is arranged such that only one cable is vertically aligned. A cable basket characterized by being provided. 8. A crane, characterized in that the cable basket according to claim 1 is installed on an upper part of a suspending tool which is suspended from a moving body so as to be lifted and lowered.