JP2004359387A - Cable retention unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To certainly prevent a cable of a cable retention unit from being broken. <P>SOLUTION: In the cable retention unit, an end of the cable 2 is connected to a cable connection object 1 travelling on a predetermined route. A cable drum 3 is arranged like a movable pulley at the intermediate part of the cable 2. A tension is applied to the cable 2 between the cable drum 3 and the cable connection object 1 by a drag loaded on the cable drum 3. A body part 4 of the cable drum 3 and flanges 5 protruded on the both sides of the body part 4 for preventing falling-off of the cable 2 are formed to freely rotate to each other. On wall surfaces of the flanges 5 on the body part 4 side, cushioning members 6 freely rotatable to the flange 5 are interposed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cable holding device.
[0002]
[Prior art]
BACKGROUND ART As a cable holding device for holding a power supply cable to a moving power supply target, a device described in Patent Literature 1 is conventionally known.
[0003]
In this conventional example, the cable holding device is configured by interposing a cable drum at an intermediate portion of a power supply cable whose one end is connected to a power supply target. To prevent the power supply cable from sagging.
[0004]
The cable drum is rotatably held by an elevating member, and flanges are arranged at both ends of the cable drum to prevent the power supply cable from being detached. By making the flange freely rotatable with respect to the drum main body, damage due to sliding contact of the power supply cable with the flange is prevented.
[0005]
[Patent Document 1]
JP-A-7-89605
[Problems to be solved by the invention]
However, in the above-described conventional example, when the flange slides on the wall surface of the elevating member, for example, during the movement of the cable drum, slippage of the flange is prevented, so that the sliding contact between the power supply cable and the flange is prevented. There is a problem that it cannot be completely prevented and the operation reliability is lacking.
[0007]
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned drawbacks, and has as its object to provide a cable holding device capable of reliably preventing breakage of a cable.
[0008]
[Means for Solving the Problems]
The cable 2 whose one end is connected to the cable connection target 1 is wound around a cable drum 3 having flanges 5 at both ends of a body portion 4, and gives an appropriate resistance to the movement of the cable connection target 1 to the cable drum 3. In addition, tension is generated in the cable 2, and slack, meandering, and the like of the cable 2 are prevented.
[0009]
The flange 5 is freely rotatable with respect to the body 4, and is considered so that the cable 2 does not slide and contact the flange 5 when the cable drum 3 rotates, so that the cable 2 is not damaged.
[0010]
On the other hand, in order to prevent meandering of the cable 2 and the like, the cable drum 3 needs to be accurately moved in the moving direction of the cable connection target 1, and a guide member for that is required.
[0011]
In the present invention, even when the flange 5 slides on a guide member or the like when the cable drum 3 is moved, and the idling of the flange 5 with respect to the body 4 is hindered, the buffer body 6 idles with respect to the flange 5.
[0012]
As a result, since the cable 2 is reliably prevented from slidingly contacting a member fixed relatively to the cable 2, the cable 2 is not damaged by rubbing or the like due to a difference in the circling speed.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
1 to 3 show an embodiment of the present invention applied to a magnetic tape library device. The magnetic tape library device has an appropriate number of cartridge accommodation units 7 and drive units 8. A magnetic tape cartridge is accommodated in the drum-shaped cartridge accommodating unit 7, and is conveyed to the drive unit 8 by an accessor robot (cable connection target 1) running between the drive unit 8 and the cartridge accommodating unit 7 and is transferred to the magnetic tape. Is read and written.
[0014]
As shown in FIG. 2, the accessor robot 1 has a traveling base 1a and a vertical frame 1b, and a guide roller 10 driven by an X-axis motor 9 is mounted on the traveling base 1a. The guide roller 10 is disposed so as to sandwich the rail 11 from above and below. When the X-axis motor 9 is driven, the accessor robot 1 travels along the rail 11 in the horizontal direction.
[0015]
A hand assembly 12 capable of handling the magnetic tape cartridge is disposed on the vertical frame portion 1b. The hand assembly 12 is driven in a vertical direction by a Y-axis motor 13 mounted on the traveling base 1a.
[0016]
One end of a belt-shaped cable 2 holding a plurality of power supply lines and signal lines in an insulator is connected to the accessor robot 1 for power supply and signal transmission to a drive unit of the accessor robot 1. You. The other end of the cable 2 is connected to a power supply unit or the like (not shown). The cable 2 is disposed at a position slightly separated from the traveling base 1a of the accessor robot 1 after passing through the accessor robot 1 once. After being wound half-turn around the drum 3 and folded, it is connected to the accessor robot 1.
[0017]
As shown in FIGS. 2 and 3, the cable drum 3 is rotatably held by a drum holder 14, and is wound around a pulley 14 a mounted on the drum holder 14. A drag (F) is applied in a direction opposite to the moving direction of the accessor robot 1 via the wire 15. As a result, a predetermined tension is applied to the cable 2 even while the accessor robot 1 is moving, thereby preventing the cable 2 from becoming loose.
[0018]
As shown in FIG. 3, the cable drum 3 includes a body 4 pivotally supported via a bearing 14 d on a shaft 14 c provided between a pair of wings 14 b, 14 b disposed opposite to the drum holder 14. In order to prevent the cable 2 from being detached from the body 4, a flange 5 is provided on both side edges of the body 4. The flange 5 is externally fitted to the shaft 14c via a bearing 14e, and is rotatable relative to the body 4.
[0019]
Further, an appropriate gap is formed between the inner wall surface of the flange 5 and the side edge of the body 4, and the buffer 6 is inserted into the gap. In this embodiment, the buffer 6 is a donut-shaped disk formed of a stainless plate having a thickness of about 1 mm, and is prevented from falling off by a stopper plate 16 fixed to the inner wall surface of the flange 5. It is mounted so that it can rotate freely.
[0020]
Therefore, in this embodiment, as shown in FIG. 4, the flange 5 is pushed by the side edge of the cable 2 due to the curvature of the cable 2 and the cable drum 3 slides on the rail 11 as shown in FIG. Even if the idling of the flange 5 is prevented, the buffer 6 with which the side edge of the cable 2 is in contact can idle with respect to the flange 5. For this reason, since the buffer 6 rotates following the rotation of the cable 2, the cable 2 is not rubbed, and damage to the cable 2 is reliably prevented.
[0021]
【The invention's effect】
As is apparent from the above description, according to the present invention, even if the idling of the flange is hindered, the cable is not rubbed against the components of the cable drum, so that it is possible to reliably prevent damage to the cable. it can.
[Brief description of the drawings]
FIGS. 1A and 1B are diagrams showing a magnetic tape library device, wherein FIG. 1A is a side view and FIG. 1B is a plan view.
FIG. 2 is an explanatory perspective view showing an accessor robot.
3A and 3B are views showing a cable drum, wherein FIG. 3A is a half-sectional view, and FIG. 3B is an enlarged view of a 3B part of FIG.
FIGS. 4A and 4B are diagrams showing the operation of the present invention, wherein FIG. 4A is a plan view showing the curvature of a cable, FIG. 4B is a front view showing a cable drum operating at a normal position, and FIG. FIG.
[Explanation of symbols]
1 Cable connection object 2 Cable 3 Cable drum 4 Body 5 Flange 6 Buffer

Claims (2)

A cable drum is arranged in a moving pulley shape at an intermediate portion of a cable connected at one end to a cable connection target traveling on a predetermined route,
A cable holding device that applies tension to a cable between a cable drum and a cable connection target by a drag force applied to the cable drum,
Along with the body of the cable drum and flanges protruding from both sides of the body to prevent detachment of the cable, are formed so as to freely rotate with each other,
A cable holding device in which a shock-absorbing body that is freely rotatable with respect to the flange is interposed on the body side wall surface of the flange. The cable holding device according to claim 1, wherein the buffer is formed in a flat donut shape.

Images