JPH06246380A - Method and device for correcting wire rope - Google Patents

Abstract

PURPOSE:To easily correct a bent habit of a wire rope, a twisted habit and a sectional deformation with a reduced labor and in a short time, and to easily automatize the device. CONSTITUTION:Wire rope correcting roller arranged in a pyramid shape is composed of two driving rollers 4 with a U-shaped groove and a pressing roller 5 with a U-shaped groove. A wire rope 1 is clamped between these rollers 4, 5 while being applied with a pressurizing force. In the U-shaped grooves of the rollers 4, 5, the radius of the bottom surface thereof is made in a range of 75%-85% of the radius of the wire rope 1, the wire rope 1 is received in the U-shaped grooves with the pressurizing force in a state being forcibly pressed, the wire rope is squeezed through the U-shaped groove surface of the rollers 4, 5 by relatively moving the rollers 4, 5 on the wire rope to the wire rope in this state, and a bent habit of the wire rope, a twisted habit and a sectional deformation of the wire rope are corrected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a straightening technique for removing bending and twisting of a wire rope caused by a work of suspending a heavy object, and particularly to a wire straightening method and device suitable for automating the straightening work.

[0002]

2. Description of the Related Art A wire rope is used as a binding wire for transporting various products and materials and as a five-hanging wire. In such a case, the wire rope is apt to be strongly bent or twisted. Not only is it difficult to sling a wire rope with a habit like this, but when suspended, it causes elongation due to the load and changes the center of gravity of the suspension, and causes dangerous accidents such as cutting and breaking. Is not preferable for safety.

Conventionally, in straightening a wire rope having such a bend, for example, as shown in FIG. 10, the bent portion of the wire rope 1 is used as a channel 3.
A device for fixing by fixing it with No. 1 and correcting it by repeatedly pressurizing this curved portion by a bending jig 33 driven by a cylinder 32 such as hydraulic pressure or pneumatic pressure (this is compared with the first conventional example. 11), the upper pulley 41 and the lower pulley 42 are alternately arranged, and the wire rope 1 is pinched by these pulleys, and the wire rope 1 is forcibly pulled out to A roll-type straightening device or a roll-type straightening device that straightens the bending and twisting of the rope.
For example, there is one disclosed in Japanese Examined Patent Publication No. 52-35783, which will be referred to as a second conventional example). In addition, as disclosed in Japanese Unexamined Patent Publication No. 53-53563, the wire rope is unidirectional. The wire rope is bent linearly in the rope insertion path and a straightening lever for eccentric arrangement of the rope insertion hole or a straightening lever for crank motion is arranged in the path of movement of the rope. There is proposed a device (referred to as a third conventional example) for correcting the bending and twisting of the rope by circularly moving the V-shaped portion while inserting the same.

[0004]

Of these conventional techniques, the first conventional example requires a great deal of labor and time to set a bent or twisted portion in the straightening device. In the example, the rope sandwiched between the pulleys arranged alternately is forcibly pulled out, but the pulling power is extremely large due to the large pull-out resistance, and it is impossible to pull out especially with a large-diameter wire rope. In the third conventional example, too, a large amount of power is required to rotate a heavy wire rope by a rotating disk or a crank, and there is a problem in practical use.

Further, in any of the conventional examples, it takes time to correct bending or twisting, and when the wire rope is deformed into an elliptical shape only for correcting bending or twisting. However, it did not have the function of correcting this to a perfect circle. The cross-section deformation of this wire rope is
In addition to reducing the durability of the wire rope, it causes twisting and twisting, so that the twisting correction may not be sufficiently removed by the conventional techniques.

The present invention has been made in view of the above points, and it is an object of the present invention to easily bend and twist a wire rope and to reduce the cross-sectional deformation of the wire rope with a small amount of labor and in a short time, and to easily automate it. An object of the present invention is to provide a wire rope straightening method and device.

[0007]

In order to achieve the above object, the present invention basically proposes the following wire straightening method.

That is, a U-shaped grooved pressing roller and at least two U-shaped grooved driving rollers that are driven by a motor constitute a wire rope straightening roller arranged in a pyramid shape. The wire rope to be straightened is pressed by the roller while applying a pressing force, and the U-shaped groove of the driving roller and the pressing roller is
The bottom radius of the wire rope is made smaller than that of the wire rope to be straightened, and the wire rope to be straightened is press-fitted into the U-shaped groove by the pressing force. In this state, the drive roller and the pressing roller are connected to the wire to be straightened. By moving the wire rope to be straightened relative to the wire rope to be straightened and squeezing the wire rope to be straightened by the U-shaped groove surfaces of the driving roller and the pressing roller, the wire rope to be straightened is twisted, twisted, and the cross section of the rope is deformed. To correct.

Further, as a basic device used in the wire rope straightening method, a wire rope straightening device having a pyramidal arrangement with a U-shaped grooved pressing roller and at least two U-shaped grooved driving rollers driven by a motor. And a pressing force generating mechanism that generates a pressing force by relatively moving the pressing roller in a direction perpendicular to a straight line connecting the driving rollers.

[0010]

Prior to the operation of the present invention, the mechanism of bending and twisting of the wire rope will be described with reference to FIG.

In general, the wire rope 1 has several hemp cores (core ropes) 1A at the center thereof, and a plurality of ropes 1B having a thin wire bundled around the rope ropes. When the wire rope is strongly bent, the outside of the bend is shown in Fig. 9.
As shown in FIG. 3, the child ropes 1B are separated from each other and opened (the portion indicated by the symbol a), and the child ropes 1B are compressed and densely biased on the inner side. Further, when a heavy load is lifted by the wire rope or a strong pulling force is applied, the child ropes 1B are displaced from each other as shown by the arrow b in FIG. If the section is deformed in cross section (typically, there is an elliptical collapse), this also causes twisting. As described above, most of the bending and twisting of the wire rope are different from general plastic deformation (note that there are cases where the plastic deformation occurs and the wire is bent).

As described above, the twisting due to the positional deviation and the cross-section deformation indicated by reference numeral b, which is caused by the dense deviation occurring in the openings a of the child ropes 1B and the opposite side thereof, is easily corrected by the conventional device. Could not do this, and this had lengthened the time spent on correction. That is, in the past, it could not be said that the mechanism of occurrence of curling or twisting was sufficiently grasped and dealt with.

On the other hand, according to the present invention, the wire rope to be straightened which is sandwiched between the straightening rollers (the driving roller and the pressing roller having the U-shaped groove) arranged in a pyramid shape is the U of the driving roller and the pressing roller. Although larger than the bottom radius of the V-shaped groove, a pressing force acts on the wire rope, and due to this pressing force and the elasticity of the wire rope, the wire rope portion applied to the drive roller and the pressing roller is U of each of these rollers.
The wire rope is squeezed by being press-fitted into the U-shaped groove and moving the drive roller and the pressing roller with the U-shaped groove relative to the wire rope in this state.

Then, if the wire rope is squeezed with an appropriate force, the child rope 1B of the wire rope is restored to the original proper position, and the opening a as shown in FIG. Displacement between child ropes 1B is also eliminated,
Bending and twisting can be corrected, and even when the wire rope has a deformed cross section such as an ellipse, the wire rope is pressed into the U-shaped groove of the correction roller and squeezed. The deformed part is corrected to a perfect circle.

Further, the bending behavior caused by the plastic deformation of the wire rope is corrected by the pressing force received from the pressing roller and the driving roller.

According to the experiments conducted by the present inventor, in order to apply an appropriate ironing force to the wire rope to be straightened, the drive roller and the pressing roller having the U-shaped groove have a bottom radius of the U-shaped groove. 75% to 85 of radius of straightening wire rope
It has been confirmed that it may be in the range of%. In other words, by applying an appropriate ironing force, excessive wire ironing of the wire rope is prevented and damage is prevented, and moreover, the relative movement of the straightening roller with respect to the wire rope is made about 2 reciprocations, so that the wire rope bends. , It is possible to correct twisting and cross-section deformation.

During the straightening work, at least the driving roller among the straightening rollers is driven to rotate by the power of the motor (all the driving roller and the pressing roller may be driven by the motor), so that the pull-out resistance of the wire rope can be reduced. As a result, the load on the power mechanism for relatively moving the wire rope and the straightening roller can be reduced, the work efficiency can be significantly improved, and the wire rope having a large diameter can be straightened.

A conventional roll-type straightening method (see, for example, FIG. 1)
1) also has a U-shaped groove in the pulley for wire rope straightening, but since the bottom radius of this U-shaped groove is larger than the radius of the wire rope to be straightened, the ironing action as in the present invention is obtained. Can't expect Further, since the pulley for straightening is not driven by a motor, and is solely dependent on the force of forcibly pulling out the wire rope, the efficiency of straightening work is significantly inferior to that of the present invention, and a wire rope with a large diameter is used. It is difficult to correct.

Next, as described above, the apparatus for straightening a wire rope is a wire rope in a pyramidal arrangement with a U-shaped grooved pressing roller and at least two U-shaped grooved driving rollers driven by a motor. A straightening roller is configured, and if a pressing force is generated in the pressing roller in a direction perpendicular to a straight line connecting the driving rollers, an appropriate pressing force is applied to the wire rope to be straightened by the pressing roller. it can.

When a wire straightening operation is performed using this apparatus, tension is applied to the wire rope so that the wire rope is not slack due to its own weight. In addition, at least one end of the wire rope is connected to the rope support via a twister in order to ensure a twist removal operation.

[0021]

Embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention, in which 1 is a wire rope to be straightened, and 2 is a straightening device main body.

The straightening device main body 2 comprises a straightening roller composed of two driving rollers 4 and a pressing roller 5 arranged in a pyramid shape on the roller support 3, and the straightening rollers 4 and 5 supply power to the traveling carriage 6. It is configured to be mounted together with the box 7. Here, the driving roller 4 is arranged on the lower side and the pressing roller 5 is arranged on the upper side.

Each of the driving roller 4 and the pressing roller 5 has a U-shaped groove used for straightening the wire rope, and the driving roller 4 and the pressing roller 5 have one motor 13.
It is set so as to be simultaneously driven to rotate via the gear mechanism by the power of (corresponding to M1 shown in FIG. 5).

Reference numeral 8 indicates, for example, a hydraulic cylinder, an air cylinder,
A pressing force generating mechanism configured by any one of a motor or the like performs a so-called rolling-down operation in which the pressing roller 5 is relatively moved in a direction perpendicular to a straight line connecting the driving rollers 4 to generate a pressing force.

The traveling carriage 6 is provided with wheels 9 capable of freely traveling (the wheels 9 are shown in a perspective view in the figure), a traveling power is given to a motor 10, and a steering wheel 11 is also provided.
Steered by. An operation panel 12 includes various push buttons and the like for operating the traveling carriage 6 to stop and run, raising and lowering the pressing force generating mechanism 8 and rotating directions of the driving roller 4 and the pressing roller 5 for correction.

As shown in the motor speed control circuit of FIG. 5, the motor 10 for running and the motor 13 for driving the rotation of the driving roller 4 and the pressing roller 5 are controlled by the pulse generator 14 to determine the peripheral speed of the motor 13 for driving rotation. Detect and control circuit 15
On the basis of this detection signal, the traveling carriage 6 (correction device body 2)
Has a function of controlling the motor 10 so that the traveling speed of the motor is the same as the peripheral speed of the rollers 4 and 5.

Reference numeral 16 is a wire rope positioning device,
It is used to change the circumferential direction of the wire rope 1 by the power of the motor 17 while supporting one end of the wire rope 1. Reference numeral 18 is a twister, and 19 is a chain block.

Next, a straightening operation of the wire rope 1 using the straightening device of the present embodiment having the above-mentioned structure will be described.

One end of the wire rope 1 to be straightened is connected to the positioning device 16, and the other end thereof is connected to the rope support 20 via the return device 18. In this case, the wire rope 1 is connected to the rope support tool 20 by using a chain block 19 for the purpose of applying a tension to bend the wire rope 1 due to its own weight. Alternatively, instead of the chain block, it is pulled by a forklift truck or the like equipped with the rope support tool 20.

Next, the traveling carriage 6 is caused to travel, and the correction device main body 2 is moved by using the steering handle 11 so as to approach the wire rope 1. At this time, the pressing roller 5 is in the raised position as shown by the solid line in FIG. 6 by the push button operation of the operation panel 12, and after setting the wire rope 1 between the driving roller 4 and the pressing roller 5 in this state, The pressing roller 5 is lowered by the power of the pressing force generating mechanism 8. As a result, the wire rope 1 is sandwiched between the drive roller 4 and the pressing roller 5.

The wire rope is straightened after the above-mentioned set is completed, but each of the straightening rollers 4 and 5 has its U
The bottom radius of the groove is specified to be 75% to 85% of the radius of the wire rope 1. There are two types of wire straightening: local correction for large bends, and overall correction for small bends, twists, and rope cross-section deformations.

If there is a local correction point (large bend), the wire straightening device body 2 is moved to that position before setting the wire rope, and then the wire rope 1 is placed between the pressing roller 5 and the driving roller 4. Position, the motor 17 of the alignment device 16 is normally or reversely rotated to set the wire rope so that a large locally bent peak of the wire rope comes under the pressure roller 5, and the pressure roller 5 is lowered in this state. Then, if a pressing force is applied to the chevron portion of the wire rope 1, the two drive rollers 5 located below the wire rope 1
With the fulcrum as a fulcrum, the straightening force of the rope is applied to the mountain portion of the rope, and large bending habits are almost removed.

However, as the bending behavior of the wire rope 1, since the opening a of the cord 1B of the wire rope 1 and the dense deviation on the opposite side thereof as shown in FIG. 9 remain, the bending behavior can be said to be almost perfect. Since it cannot be removed and a small bend remains, the following general correction is made.

Here, in the case of correcting a comparatively small bend (including the above small bend that cannot be completely corrected), twisting, and rope cross-section deformation distributed over the entire length of the wire rope 1 (whole correction) ) Will be described.

The wire rope 1 is sandwiched by the driving roller 4 and the pressing roller 5. At this time, by operating the push button on the operation panel 12, the driving roller 4 and the pressing roller 5 are rotationally driven in the same direction while keeping the amount of pressing (pressing force) of the pressing roller 5 constant, and at the same time, synchronized with this peripheral speed. By moving the straightening device main body 2 along the wire rope 1 at a high traveling speed,
The straightening operation is performed while preventing the slip between them.

In this case, the wire rope 1 is larger than the bottom radii of the U-shaped grooves of the drive roller 4 and the pressing roller 5, but the wire rope 1 is acted upon by the pressing force from the pressing roller 5, and Due to the elasticity of the wire rope 1, the wire rope portion applied to the driving roller 4 and the pressing roller 5 is as shown in FIG. 3 (FIG. 3 is a sectional view taken along the line EE in FIG. 2).
When the rollers 4, 5 are received in the U-shaped grooves of the rollers 4, 5 in a press-fitted state and the traveling carriage 6 moves the rollers 4, 5 relative to the wire rope 1 relative to the wire rope 1,
Is squeezed with moderate force.

As a result, the rope 1B of the wire rope 1 is restored to the original proper position, the opening a as shown in FIG. 9 and the dense deviation on the opposite side are eliminated, and the positional deviation between the ropes 1B is also eliminated. It is eliminated, and bending and twisting are corrected sufficiently.

Further, even when the wire rope 1 is deformed into an elliptical cross section or the like, since the wire rope 1 is pressed into the U-shaped grooves of the straightening rollers 4 and 5 and squeezed, the deformed portion is true. It is corrected to a circle and the twist due to the cross-section deformation is also removed. FIG. 4 shows a process in which the deformed section of the wire rope 1 is gradually restored to a perfect circle by the U-shaped grooves of the rollers 4 and 5.

When the twisting behavior of the wire rope 1 is corrected, twisting occurs in a chained manner.
Absorbed by.

At the beginning of the straightening work, the wire rope has bends of various directions and sizes, and the bent portion approaches or leaves the straightening device main body 1. By moving the traveling carriage 6 back and forth with the operation handle 11, the wire rope 1 can be prevented from coming off the U-shaped grooves of the rollers 4 and 5. Further, since the length of the wire rope 1 changes as the wire rope 1 is straightened, the chain block 19 is used for the purpose of reapplying a constant tension in this embodiment. This can be a forklift truck or other towing method.

According to this embodiment, the straightening work of the wire rope 1 can be completed by reciprocating the straightening device body 2 about twice. Also, in the straightening work, the straightening rollers 4 and 5 are rotationally driven by the power of the motor, so that the pull-out resistance of the wire rope can be reduced,
As a result, the load on the power mechanism for relatively moving the wire rope and the straightening roller can be reduced, the working efficiency can be significantly improved, and the wire rope having a large diameter can be straightened. Specifically, one operator of the straightening device can perform automatic straightening. For example, when the roller pressure is 8000 kg and the roller pressing stroke MAX is 85 mm, the wire rope having a diameter of 30 mm and a length of 20 m can be bent, twisted, or deformed in section. The work was completed in 13 minutes, which shortened the work time by 80% compared with the conventional method and enabled the straightening of a large diameter wire rope having a diameter of 60 mm. Further, compared with the conventional method of correcting the reverse warp action as shown in FIG. 10, the durability could be improved without damaging the wire rope.

FIG. 8 shows a second embodiment of the present invention.
The same reference numerals as in the first embodiment indicate the same or common elements. In this embodiment, in addition to the U-shaped grooved drive roller 4 and the pressing roller 5 which constitute a straightening roller, an idle roller 20 is provided, and a straightening apparatus main body including these straightening rollers 4 and 5 and the idle roller 20 is provided. 2'is fixed. Both ends of the wire rope 1 are connected by a towing rope 23. The rope 23 is wound around a drive pulley 21 provided in a towing means such as a crane 22, and the forward and reverse rotations of the drive pulley 21 cause the rope 23 to pass through the rope 23. The straightening wire rope 1 is reciprocally moved. In this case also, the driving roller 4 and the driving roller 5 are rotationally driven by the motor. In addition, U of rollers 4 and 5 for wire rope 1 at the time of straightening
The specifications of the V-shaped groove are the same as those in the first embodiment.
In addition to the same effect as the first embodiment, the installation space for the correction work can be rationalized.

Incidentally, the straightening rollers 4 and 5 of the above respective embodiments
Uses a total of three rollers, but it is also possible to use more rollers. In addition, even if only the driving roller 4 of the driving roller 4 and the pressing roller 5 forming the correction roller is driven by the motor, the same effect as in the above embodiment can be obtained.

[0045]

As described above, according to the present invention, the bending and twisting of the wire rope and the cross-sectional deformation of the wire rope can be easily corrected with a small labor and in a short time, and the automation can be easily achieved.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a wire rope straightening device according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a wire straightening device main body used in the above embodiment.

FIG. 3 is a sectional view taken along the line EE of FIG.

[Fig. 4] Schematic diagram of straightening wire rope cross section

FIG. 5 is a diagram showing a control circuit of a U-shaped grooved roller driving peripheral speed and a traveling carriage moving speed.

FIG. 6 is a schematic diagram showing the alignment device used in the above embodiment and its operation.

FIG. 7 is an explanatory view of a twisting mechanism used in the above embodiment.

FIG. 8 is a configuration diagram showing a second embodiment of the present invention.

FIG. 9 is an explanatory view showing a mechanism of bending and twisting of the wire rope.

FIG. 10 is an explanatory view showing a conventional example of wire rope straightening.

FIG. 11 is an explanatory view showing a conventional example of wire rope straightening.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wire rope, 2 ... Correction device main body, 4 ... U-shaped grooved drive roller, 5 ... U-shaped grooved pressing roller, 6 ... Traveling carriage, 8 ... Pressing force generation mechanism, 11 ... Steering handle, 15
... speed control means, 16 ... rope alignment device, 18 ... return device, 19 ... chain block.

Front Page Continuation (72) Inventor Akira Sonobe 1-4-1 Sachimachi, Hitachi City, Ibaraki Hitachi Kyowa Kogyo Co., Ltd. (72) Inventor Hiroo Nohara 1-4-1 Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi Kyowa Kogyo Co., Ltd. (72) Inventor Ryuichi Kanno 1-4-1 Sachimachi, Hitachi City, Ibaraki Prefecture Hitachi Kyowa Kogyo Co., Ltd. (72) Inventor Takeo Endo 3-chome, Hitachi City, Ibaraki No. 1 Stock company Hitachi Ltd. Hitachi factory

Claims (9)

[Claims] 1. A wire rope straightening roller arranged in a pyramid shape is constituted by a U-shaped grooved pressing roller and at least two U-shaped grooved driving rollers driven by a motor, and these driving roller and pressing roller are arranged. The wire rope to be straightened is pressed by the roller while applying a pressing force, and the U-shaped groove of the drive roller and the pressing roller has a bottom surface radius smaller than that of the wire rope to be straightened to form a U-shaped groove. The pressing wire receives the wire rope to be straightened in a press-fitted state, and in this state, the drive roller and the pressing roller are moved relative to the wire rope to be straightened on the wire rope to be straightened to move the drive roller and the pressing roller. By squeezing the wire rope to be straightened at the U-shaped groove surface, the wire rope to be straightened can be bent, twisted, and deformed in the rope cross section. A wire rope straightening method characterized by straightening. 2. The drive roller and the pressing roller having the U-shaped groove according to claim 1, wherein a bottom radius of the U-shaped groove is within a range of 75% to 85% of a radius of the wire rope to be straightened. A method of straightening a wire rope. 3. The wire rope to be straightened according to claim 1 or 2, when the wire rope to be straightened has a large locally curved portion, the curved peak is directed so as to face the U-shaped grooved pressing roller side. A method for straightening a wire rope, characterized in that the straightening wire rope is position-aligned and controlled, and the curved ridge is pressed by the pressing roller to locally correct the ridge. 4. A U-shaped grooved pressing roller and at least two U-shaped grooved driving rollers driven by a motor constitute a wire rope straightening roller arranged in a pyramid shape, and connect the driving rollers. A wire rope straightening device comprising: a pressing force generating mechanism that generates a pressing force by moving the pressing roller in a direction perpendicular to a straight line. 5. The pressing roller according to claim 4, wherein the pressing roller is driven by a motor in addition to the driving roller that constitutes the straightening roller, and the driving roller and the pressing roller are simultaneously driven by a single motor through a gear mechanism. A wire rope straightening device characterized by being driven. 6. The U according to claim 4 or claim 5.
A wire rope straightening device, characterized in that the driving roller and the pressing roller having a V-shaped groove are mounted on a traveling carriage having steering means and self-propelled means. 7. The traveling carriage according to any one of claims 4 to 6, wherein the traveling carriage comprises speed control means for traveling at the same speed as the peripheral speeds of the driving roller and the pressing roller. Wire rope straightening device. 8. The wire rope straightening device according to claim 4, further comprising a twisting device for connecting one end of the wire rope to be straightened to a rope support. apparatus. 9. The rope aligning device according to claim 4, further comprising a rope aligning device that supports one end of the wire rope to be straightened and changes the circumferential direction of the rope. Wire rope straightening device.