JP3001266U - Cable intermediate feeder - Google Patents

Abstract

(57) [Summary] [Object] To provide a cable intermediate feeding device capable of surely preventing abrasion and damage of a cable surface due to slip of a driving drum. A cable intermediate feeding device that clamps an outer peripheral surface of a cable 4 between a driving drum 1 rotated by a motor 2 and a pressing driven wheel 3 and feeds the cable 4 in a longitudinal direction by the rotation of the driving drum 1. Then, a travel detection / feed stop means for detecting the interruption of the travel of the cable 4 while the drive drum 1 is rotating and stopping the drive of the motor 2 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cable intermediate feeding device.

[0002]

[Prior art]

 When laying a cable with a thick shaft (outer diameter of 40 mm or more, for example) in a rack at a high place where it is dangerous for people to get on and work, a cable intermediate feeder is provided to feed the cable in the middle. Although used, this device has conventionally been shown in FIGS. 5 and 6.

That is, in the apparatus of FIG. 5, the outer peripheral surface of the cable c is pinched by a plurality of driving drums a ... Rotated by a motor and a plurality of pressing driven wheels b. The structure is such that c is fed in the longitudinal direction.

[0004]

[Problems to be solved by the device]

 However, while the cable c is traveling in the device of FIG. 5, for example, even if the middle of the cable c is caught by something on the downstream side of the device and the traveling is interrupted, the driving drum is stopped. Since the rotation of a ... does not stop, there is a problem that slippage occurs and the surface of the cable c is worn and scratched.

Further, the driving drum a and the pressing driven wheel b are arranged so as to be displaced in the longitudinal direction of the cable c, and the pressing driven wheel b is pressed in the direction of arrow e toward the intermediate portion between the adjacent driving drums a and a. Therefore, there is a problem that the cable c bends and escapes as shown by the phantom line, and the cable feeding force becomes small.

Further, in the apparatus of FIG. 6, the endless track belts f and f are suspended on a pair of drive drums a and a rotated by a motor and a pair of pressure driven wheels b and b, respectively. The structure is such that the peripheral surface is clamped and the cable c is fed in the longitudinal direction.

However, in this case, there is a problem that the structure is complicated, the number of parts is increased, and the entire device is enlarged.

Therefore, an object of the present invention is to provide a cable intermediate feeding device that solves the above-mentioned conventional problems.

[0009]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is a cable that clamps the outer peripheral surface of a cable between a drive drum that is rotated by a motor and a pressure driven wheel, and that feeds the cable in the longitudinal direction by rotating the drive drum. The intermediate feeding device is provided with running detection / feed stopping means for detecting the interruption of running of the cable while the driving drum is rotating and stopping driving of the motor.

Further, the travel detection / feed stop means is a detector for detecting the rotation stop state of the pressure driven wheel, and a control for stopping the drive of the motor by the signal of the detector while the drive drum is rotating. And a vessel.

Further, one driving drum and one pressing driven wheel are arranged such that both axes thereof are parallel to each other, and the pressing driven wheel is driven along a plane including the both axes. It was configured so as to approach the drum and clamp the outer peripheral surface of the cable.

Further, the pressing driven wheel is rotatably attached to the supporting member having a screw hole, and the screw hole of the supporting member so as to reciprocate the pressing driven wheel in the approaching and separating direction with respect to the drive drum. And a plurality of detected pins projecting from one end surface of the pressure driven wheel at a predetermined circumferential pitch, and non-contact detection of the presence or absence of passage of the detected pins. A detector was attached to the support member.

[0013]

[Operation] When the screw shaft is rotated in a predetermined direction, the pressing driven wheel approaches the driving drum along the plane including both the axis of the pressing driven wheel and the driving drum, and the cable is pinched. The flexure will not escape and the contact pressure between the drive drum and the cable will increase, increasing the cable feed force.

While the cable is traveling by the drive drum, if the traveling of the cable is interrupted (stopped) for some reason, the rotation of the pressing driven wheel that has been driven by the traveling of the cable is stopped, and The controller automatically stops the motor drive immediately by the signal from the detector that detects the rotation stop of the pressure driven wheel. This stops the rotation of the drive drum and prevents cable surface wear due to slipping of the drive drum.

[0015]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment.

FIG. 1 shows a cable intermediate feeding device according to the present invention. In FIG. 1, reference numeral 1 denotes a drive drum which is rotated by a motor 2 and has a concave outer peripheral surface. The drive drum 1 and a pressure driven wheel 3 are provided. The outer peripheral surface of the cable 4 is clamped by and, and the rotation of the drive drum 1 gives the cable 4 a feed in the longitudinal direction.

FIG. 2 shows an example of use of the cable intermediate feeding device and shows a case where the cable 4 is laid on a rack 5 installed at a high place. The cable intermediate feeding device is installed on the rack 5 and runs the cable 4 along the rack 5 by the driving drum 1 in the direction of arrow T at a predetermined feeding speed. Then, the cable 4 is wound up by the winding drum 6 which rotates in synchronization with the feeding speed.

Reference numeral 7 denotes a base, which is fixed on the rack 5 by a fixture 8 such as a bolt and nut, which is omitted from the dashed line. The drive drum 1, the motor 2, the pressure driven wheel 3, the operation box 9 and the like are provided on the base 7.

As shown in FIGS. 1 and 2, the motor 2 is a variable speed electric motor and is connected to the drive drum 1 via a speed reducer or the like.

The operation box 9 has a motor rotation control circuit 10 and the like (see FIG. 3) for controlling the rotation of the motor 2, and has a rotary knob 11 for adjusting the rotation speed of the drive drum 1 and the drive drum 1. A changeover switch 12 for switching the rotation direction of the drive drum 1 between normal rotation and reverse rotation, and a main switch 13 for manually switching the rotation / stop of the driving drum 1 are provided.

Therefore, in the present invention, there is only one driving drum 1 and one pressing driven wheel 3, and the axes A and B of the driving drum 1 and the pressing driven wheel 3 are arranged so as to be parallel to each other. The pressing driven wheel 3 is configured to approach the drive drum 1 along the plane including B to clamp the outer peripheral surface of the cable 4.

Specifically, in the device of the present invention, the pressing driven wheel 3 is rotatably attached and the supporting member 14 having the screw hole 23 and the pressing driven wheel 3 are separated from the driving drum 1 by approaching. A screw shaft 15 screwed into the screw hole 23 of the support member 14 so as to reciprocate in the direction.

The screw shaft 15 is rotatably pivotally attached to a hollow guide body 17 having a long hole 16 provided upright on the base 7, and a handle 18 is connected to one end of the screw shaft 15.

The support member 14 has a threaded projection 14 a having a screw hole 23, an L-shaped attachment piece 14 b to which a detector 20 described later is attached, and a pressing driven wheel 3 rotatably attached. The support shaft portion 14c is integrally formed.

The threaded protrusion 14 a faces the inside of the hollow guide body 17 through the elongated hole 16, and the screw shaft 15 is rotated about its axis by the rotation operation of the handle 18, and the support member 14 is rotated. Moves back and forth. The axis of the screw shaft 15 is included in a plane including the axes A and B and is orthogonal to the axes A and B.

Therefore, since the cable 4 can be clamped by the pressing driven wheel 3 and the drive drum 1 in a state in which the flexure and escape of the cable 4 are restricted, the friction transmission efficiency of torque from the drive drum 1 to the cable 4 is high. The feeding force of the cable 4 is increased.

In addition, as shown in FIG. 3, the device of the present invention detects travel interruption of the cable 4 during rotation of the drive drum 1 and stops the drive of the motor 2 to detect travel. Stop means 19 are provided.

The traveling detection / feed stop means 19 includes a detector 20 for detecting the rotation stop state of the pressure driven wheel 3, and a rotation stop of the pressure driven wheel of the detector 20 while the (motor 2) drive drum 1 is rotating. A controller 21 including a microcomputer and various electronic circuits for immediately instructing the motor rotation control circuit 10 to stop the driving of the motor 2 by a signal indicating the state.

In the illustrated example, as shown in FIGS. 1 and 4, a plurality of detected pins 22 ... Are provided on one end surface of the pressing driven wheel 3 at a predetermined pitch in the circumferential direction. Due to the rotation, the detected pin 22 sequentially passes through the detector 20.

The detector 20 can detect the presence / absence of passage of the detection target pin 22 in a non-contact manner, and a magnetic sensor, an optical sensor or other various sensors can be used.

For example, when the detector 20 is a magnetic sensor, the detected pin 22 is formed of a magnetic material, and the detected pin 22 rotates the magnetically detectable area of the detector 20 by the rotation of the pressing driven wheel 3. Make sure to pass through one by one.

In this case, the detected pin 22 is intermittently detected by the detector 20 while the pressing driven wheel 3 is rotating, and the detected pin 22 is continuously detected by the detector 20 while the pressing driven wheel 3 is not rotating. Detected or not detected at all. Then, as shown in FIG. 3, based on these detection signals and the motor rotation signal from the motor rotation control circuit 10, the controller 21 controls the rotation of the pressing driven wheel 3 while the driving drum 1 is rotating. The motor 2 is stopped immediately after determining that it has stopped.

Although not shown in the drawings, when the detector 20 is an optical sensor, for example, a light projector is provided on the support member 14 and the light is received by the optical sensor. The detected pin 22 sequentially blocks the light received by the optical sensor.

Also in this case, light is intermittently detected by the detector 20 while the pressure driven wheel 3 is rotating, and light is continuously detected by the detector 20 while the rotation of the pressure driven wheel 3 is stopped. Or, since it is not detected at all, the controller 21 presses during the rotation of the drive drum 1 based on these detection signals and the motor rotation signal from the motor rotation control circuit 10 as described above. Immediately after stopping the rotation of the driven wheel 3, the rotation of the motor 2 is stopped.

According to this structure, as shown in FIG. 2, while the cable 4 is running on the drive drum 1, the cable is caused for some reason on the downstream side of the cable intermediate feeding device. Even if 4 does not move and the traveling is interrupted (stopped), the drive of motor 2 immediately stops.

That is, since the pressing driven wheel 3 is driven and rotated by the traveling of the cable 4, when the traveling of the cable 4 is stopped, the rotation of the pressing driven wheel 3 is also stopped. Therefore, as described above, the drive of the motor 2 is stopped, the rotation of the drive drum 1 is stopped, and the wear of the surface of the cable 4 due to the slip of the drive drum 1 is reliably prevented.

It should be noted that the present invention is not limited to the above-described embodiments, and design changes can be freely made without departing from the gist of the present invention. For example, it is also possible to install a plurality of intermediate cable feeding devices in the longitudinal direction of the cable and perform cable laying work. In addition to the rack 5, the present invention can be used in various places such as the ground and floor.

[0038]

[Effect of device]

 Since the present invention is constructed as described above, it has a great effect as described below.

According to the cable intermediate feeding device of the first aspect, even if the running of the cable 4 is interrupted for some reason while the cable 4 is running, the running detection / feed stop means 19 is used. Since the rotation of the drive drum 1 is immediately stopped, the abrasion and damage of the surface of the cable 4 due to the slip of the drive drum 1 can be reliably prevented, and the quality of the cable 4 can be stabilized.

According to the cable intermediate feeding device of the second aspect, since it is detected whether or not the cable 4 is traveling by using the pressing driven wheel 3 which is rotated by the traveling of the cable 4, it is complicated. It is possible to simplify the structure of the traveling detection / feed stop means 19 without requiring any special cable traveling detection means.

According to the cable intermediate feeding device of the third aspect, since the cable 4 does not escape even when the cable 4 is pinched by the pressing driven wheel 3 and the driving drum 1, the endless belt or a plurality of driving devices are provided. Even if the drum 1 and the pressure driven wheel 3 are not used, the feeding force of the cable 4 can be increased only by the single drive drum 1 and the pressure driven wheel 3.

Therefore, the motor 2 can be made small, the structure of the entire apparatus can be simplified, the number of parts can be reduced, and the manufacturing cost can be reduced. At the same time, the overall size and weight of the device can be reduced, which makes it suitable for use in high and dangerous places such as racks and in narrow spaces.

According to the cable intermediate feeding device of the fourth aspect, it is possible to easily apply a predetermined pressing force to the cables 4 having various outer diameter dimensions by a simple operation of simply rotating the screw shaft 15. And workability is good.

Further, since the rotation of the pressure driven wheel 3 is detected in a non-contact manner, even if it is used for a long period of time, there is no fear of deterioration of detection accuracy due to wear or the like, or failure, and excellent reliability is achieved. Moreover, the mechanism for detecting the rotation of the pressure driven wheel 3 is simple and easy to manufacture.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view showing an example of a usage state.

FIG. 3 is a block diagram of the overall configuration.

FIG. 4 is a side view of a main part.

FIG. 5 is a side view showing a conventional example.

FIG. 6 is a side view showing another conventional example.

[Explanation of symbols]

 1 Drive drum 2 Motor 3 Pressed driven wheel 4 Cable 14 Support member 15 Screw shaft 19 Travel detection / feed stop means 20 Detector 21 Controller 22 Detected pin 23 Screw hole A shaft center B shaft center

Claims (4)

[Scope of utility model registration request] 1. A drive drum 1 rotated by a motor 2.
A cable intermediate feeding device that presses the outer peripheral surface of the cable 4 with the pressing driven wheel 3 and feeds the cable 4 in the longitudinal direction by the rotation of the driving drum 1. An intermediate feeding device for a cable, characterized in that a traveling detection / feed stop means 19 for detecting that the traveling of the cable 4 is interrupted and stopping the driving of the motor 2 is provided. 2. A traveling detection / feed stop means 19 detects a rotation stop state of the pressure driven wheel 3, and a motor 20 is driven by a signal from the detection roller 20 while the drive drum 1 is rotating. 2. The cable intermediate feeding device according to claim 1, further comprising a controller 21 for stopping the operation. 3. A drive drum 1 and a pressure driven wheel 3 are arranged such that their axes A and B are parallel to each other, and along a plane containing the axes A and B. 3. The cable intermediate feeding device according to claim 1 or 2, wherein the pressing driven wheel 3 is brought closer to the drive drum 1 to clamp the outer peripheral surface of the cable 4. 4. A support member 14 having a pressing driven wheel 3 rotatably attached thereto and having a screw hole 23, and the supporting member 14 so as to reciprocate the pressing driven wheel 3 with respect to the drive drum 1 in an approaching and separating direction. A screw shaft 15 screwed into the screw hole 23 of the member 14 is provided, and a plurality of detected pins 22 are provided on one end surface of the pressing driven wheel 3 at a predetermined pitch in the circumferential direction. 4. The cable intermediate feeding device according to claim 1, wherein a detector 20 for detecting the presence or absence of passage is attached to the support member 14 in a non-contact manner.