JP3058871B1 - Endless compound winch and method of towing - Google Patents

Abstract

The present invention provides a multi-winding winch capable of reliably performing multiple towings in a compact configuration and automatically adjusting the imbalance between the towing speeds and loads of a plurality of ropes. SOLUTION: The compound winch has a plurality of outer circumferential grooves 1a,
1b, and a rope wound around each outer circumferential groove. The winding drum guides rollers 2a and 2b for pressing the rope against the outer circumferential groove. The winding drum guides the rope to the outer circumferential groove. Sheaves 4a and 4b for applying a pressing force to the grasping roller in accordance with the above, and connecting members 6a and 6b for connecting the sheave and the grasping roller are provided for each of the outer peripheral grooves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a winch,
In particular, the present invention relates to a multiple-turn winch having a plurality of outer peripheral grooves and a towing method using the same.

[0002]

2. Description of the Related Art A winch is used for raising and lowering a gondola for cleaning the exterior of a high-rise building, moving a truck, and opening and closing a heavy door by pulling a wire rope (hereinafter referred to as a "rope"). With respect to these winches, a structure for preventing a slip from occurring between the rope and the outer circumferential groove of the winding drum (Japanese Utility Model Publication No. 2-29110) and a bogie or a heavy door can be pulled in both forward and reverse directions. Configuration (actual fairness 6-3
No. 6052) has been proposed.

In addition to the above technical improvements, from the viewpoint of enhancing safety and improving durability, a gondola for cleaning the exterior of a high-rise building and a winch used for other purposes use a plurality of ropes. It is desirable to tow.

[0004]

However, the conventional winch using a plurality of ropes has the following problems.

First, when using a winch equal to the number of ropes, an endless winch in which the end of the rope is not fixed to the winding drum, and a winding winch in which the rope is fixed to the winding drum and the rope is wound around the winding drum Both have the following problems.

(1) Since the mechanical efficiency of each winch is different, a difference in traction speed occurs between the winding drums. Also,
Since the diameters of the pitch circles of the individually processed winding drums are different, a difference is also generated in the traction speed. For example, if the pitch circle diameter 200 mm and 200.1 mm make 100 rotations, 31 mm (that is, π × (200.1-200)
mm × 100). Further, since a motor is attached to each winch, when an unbalanced load is applied to each winch, each motor changes its rotation speed according to the load, and again causes a difference in towing speed.

(2) A control device for each winch and a control circuit for correcting the above-mentioned difference in towing speed are required, which is expensive and requires a space for mounting these control devices.

Next, problems in the case where a plurality of winding drums are attached to one winch for operation will be described.

FIG. 12 shows an appearance of an endless winch in which two winding drums are attached to one winch and two ropes are wound around the drum. This endless winch is 1
The two winding drums 501 and 502 are rotationally driven by a motor 509 and a reduction gear 508, and ropes 511 and 512 are driven.
Tow. In this winch, (1) misalignment occurs in the coupling portion 503 unless the individual winding drums 501 and 502 are securely fixed. Therefore, this winch cannot be easily mounted on a wire sling or the like. (2) High precision is required for the processing of the winding drum and the mounting of the winding drum. Further, (3) since the winding drum is connected via the coupling, it is necessary to disassemble sequentially during inspection, which causes a problem in maintenance.

FIG. 13 shows the appearance of a winding drum type multiple winding winch. The winding drum type double winch shown in FIG. 13 is provided with winding drums 601 and 602 on both sides of a speed reducer 608, and ropes 611 and 612 are wound around each winding drum. In the case of the winding drum type winch, in addition to the problems of the endless type winch, there are problems of (4) an increase in variation in the traction speed in the multilayer winding specification, an increase in the size of the winding drum in the single winding specification, and disturbance of the fleet angle. .

In short, a plurality of winding drums are shared by one common drum.
Even in the case of rotation by a plurality of rotary drive shafts, slight variations in the winding drum diameter and winding drum mounting accuracy cause variations in the pulling speed between the ropes. As a result, the load concentrates on the specific rope having a high towing speed, and as shown in FIG.
(A)) When the load 706 is tilted and suspended at the center (FIG. 1)
4 (b)), the other ropes 812 have slack, and if the slack accumulates and becomes large, traction is hindered.

Accordingly, an object of the present invention is to provide a multi-winding winch capable of securely towing a plurality of ropes in a compact configuration without adding a special control device even if the rope is towed by a plurality of ropes. And a multi-winding winch capable of automatically averaging load imbalance and a towing method using the same.

[0013]

Means for Solving the Problems] A first aspect of the d of the present invention
The dressless double-winding winch has first and second outer peripheral grooves separated from each other, and is wound around the first outer peripheral groove and one winding drum rotatably supported by the case. Is extended on the first rope on which the other extension is on the relaxed side and the second extension is wound on the second outer circumferential groove, and one extension is on the traction side for receiving the load, and The first rope is grasped by pressing the first rope against the first outer peripheral groove, the second rope being an extended portion on the relaxation side, and one end thereof is fixed to the case, and from one end thereof A first grasping roller disposed along the outer periphery of the winding drum toward the first rope lead-out side; and a portion for guiding the tow side of the first rope to the first outer circumferential groove, wherein Can be displaced according to the load on the rope The first sheave supported by the case is connected to the first sheave and the other end of the first grasping roller which is not fixed, and the first rope is moved in accordance with the displacement of the first sheave. A first connecting member for applying a force for pressing the outer peripheral groove to the first grasping roller; and a second rope for grasping the second rope by pressing the second rope against the second outer peripheral groove, one end of which is fixed to the case. And a second grasping roller disposed along the outer periphery of the winding drum from one end thereof toward the second rope lead-out side, and guiding a portion of the second rope on the traction side to the second outer peripheral groove, The second sheave supported by the case so as to be displaceable according to the load applied to the second rope on the traction side, and the second sheave and the other end of the second grasping roller that are not fixed are connected. The second sheave according to the displacement of the second sheave And a second connection member providing a force pressing the rope to a second circumferential groove in the second grasping rollers.

In the above-described multiple-winding winch, since a plurality of outer circumferential grooves are provided on one winding drum, the structure is compact, and the output is changed by variations in the mounting accuracy of the winding drum and the load of the motor. There is no.
In addition, since a grasping roller and sheave are provided for each outer circumferential groove, pressing force can be generated according to different loads for each rope, and all ropes are securely wound around the winding drum and exhibit sufficient traction force It is possible to do.
Further, by providing the grasping roller and the sheave for each outer circumferential groove, it is possible to adjust the imbalance between the load between the ropes and the towing speed by a reliable and simple means as described later. .

The above-mentioned winding drum does not need to have the same diameter as a whole. As long as the winding drum shares one rotary drive shaft, even if the diameter of each part of the winding drum is large or small,
That is, even if it is apparently divided into a plurality of parts due to the unevenness of the outer surface of the winding drum, it corresponds to one winding drum in the present invention. The above matters relating to the winding drum correspond to all the present inventions described in this specification.

Further, the double winch of the present invention has an end
Refers to a winch.

Further, in the double-winding winch provided with the gripping roller and the sheave described above, one gripping roller and a sheave are provided in each outer circumferential groove on the assumption that the pulling is performed in one direction. Both cases where two gripping rollers and two sheaves are provided in each outer circumferential groove assuming that the traction is performed in both reverse directions are included.

In the double winch of the present invention, the first
It is desirable to further include means for adjusting the imbalance between the traction speed and the load that occurs between the rope and the second rope according to the degree of the imbalance in the load.

In the multiple-turn winch of the present invention, as described above, the imbalance between the load on the rope and the towing speed is adjusted according to the degree of imbalance of the load, and the imbalance is corrected more directly. It is possible to directly improve safety.
Further, as described later, the means for adjusting the imbalance can be realized with a simple structure.

In the double winch of the present invention described above, the first
The outer peripheral groove and the second outer peripheral groove are tapered so as to decrease in width from the outer surface to the inside of the winding drum in a cross section including the center axis of the winding drum, and the bottom portions of the first outer peripheral groove and the second outer peripheral groove are formed. Even if the width is the widest, when the first rope and the second rope bite into their respective outer circumferential grooves, they are so narrow that the bottom of the outer circumferential grooves and the rope do not make surface contact with each other,
The first rope and the second rope bite into the respective outer circumferential grooves according to the magnitude of the respective loads, and the amount of bite adjusts the traction speed and load imbalance generated between the first rope and the second rope. It is desirable to do.

According to the above structure, when a load is applied to the rope, the rope bites into the outer circumferential groove. However, since the outer peripheral groove is tapered and the width of the bottom is narrow, the rope is not pressed against the bottom of the outer peripheral groove to make surface contact. Therefore, the rope does not stick to the bottom surface and does not substantially change the diameter of the winding drum. That is, while transmitting the load to the winding drum through the side wall portion of the outer peripheral groove, the rope digs into the outer peripheral groove with a bite amount corresponding to the magnitude of the load. In the above structure, the width of the bottom of the outer circumferential groove is so small that the bottom of the outer circumferential groove does not make surface contact with the rope during towing, even when the width is the widest, so that the bite amount is saturated and the load is different. The amount of bite between the ropes is not the same. Therefore, each rope changes the amount of biting into the outer circumferential groove according to the size of the load.

In the above, "narrow enough to prevent surface contact even in the widest case" means, as described above, that the rope does not cling to the bottom surface without being restricted by the side wall, and the rope is restricted by the side wall. Contact the bottom surface to some extent
And the case where the above-mentioned constraint is so strong that it does not contact the bottom surface.

In a rope having a large load and a large bite, the diameter of the winding drum is substantially reduced, and the towing distance per rotation of the winding drum, that is, the towing speed is reduced. As a result, the length of the rope having a large load from the outer circumferential groove to the load is relatively longer than that of the other ropes, so that the load on the rope is reduced and the load on the other ropes is increased. When the towing speed of the rope with a large load is reduced, and as a result, the load is reduced, and when the load of another rope is excessive, the amount of bite of the other rope is increased, and the other rope is increased. Distribute the excess load to other ropes. When the load decreases, the bite amount decreases according to the load.

Therefore, according to the above structure, even if a plurality of ropes are wound around one winding drum and the load is pulled, no slack or inclination occurs.

According to another aspect of the present invention, there is provided an endless double-winding winch, which is rotatably supported by a case and separated from each other.
A single winding drum having a plurality of outer peripheral grooves, and a rope wound around each of the plurality of outer peripheral grooves, one of which is a traction side receiving a load and the other is a relaxation side. When the load of a specific rope is large and the load of a specific rope is large, the amount of bite of the rope into the outer circumferential groove around which the rope is wound is increased, the pulling speed of the rope is reduced, the load is reduced, and the load of another rope is reduced. Increasing the load, when the load on the particular rope is reduced, reducing the amount of bite in the rope, increasing the towing speed of the rope, increasing the load, and reducing the load on other ropes. Means for adjusting the traction speed and load imbalance between them.

In the double-winding winch having the above structure, when the load on a specific rope increases,
The rope digs deeper into the outer groove than the rope wrapped around the other outer groove. Therefore, the substantial diameter of the outer circumferential groove around which the specific rope is wound becomes smaller, and the towing speed of the rope wound around the outer circumferential groove becomes smaller than the others. As a result, the length from the outer circumferential groove of that particular rope to the load is slightly longer, and therefore
The load is reduced and the reduced load is distributed to other ropes. Also, when the load on the particular rope is reduced, the amount of bite of the rope decreases, the towing speed increases, and the load on the specific rope increases by bearing a certain portion of the load of other overloaded ropes. Let it.

By the above-described operation, averaging is performed between the traction speed and the entire rope of the load. As a result, even if a plurality of ropes are wound around one winding drum, slack does not occur between the plurality of ropes and the load does not tilt. Therefore, simple towing is possible in a form in which the safety of towing by a plurality of ropes is enhanced.

[0028] The method of towing by the endless double winch of the present invention separates each other rotatably supported by the case.
One winding drum having a plurality of separated outer circumferential grooves, and a rope wound around the winding drum, one extension of which serves as a traction side receiving a load, and the other extension serving as a relaxation side, are provided with a plurality of ropes. A method of towing by a double-winding winch provided for each outer circumferential groove, a gripping roller for gripping the rope by pressing the rope against the outer circumferential groove, and a portion on a towing side so that the gripping roller can grip the rope. And a sheave that guides the roller to grasp the pressing force according to the load applied to the rope on the traction side, and the outer groove of each rope according to the load applied to the rope. By changing the amount of digging into the rope, the towing speed of the rope is changed, the imbalance of the load on each rope is adjusted, and the towing speed and load between multiple ropes are averaged. Cormorant.

According to the above-described pulling method, even if the processing accuracy of the outer peripheral groove or the mounting accuracy of the winding drum to the case varies, the variation can be absorbed by the amount of bite of the rope into the outer peripheral groove. As a result, it is possible to avoid keeping the towing speed of a specific rope high, and to distribute the load on the specific rope to other ropes. That is, the load and the towing speed are equal for each rope in each outer circumferential groove. As a result, even if a single heavy object is towed by a plurality of ropes, it can be towed without sagging or tilting, which can contribute to improvement of work efficiency and safety. As a result, it is possible to quickly average the load and the traction speed even if the load and the traction speed vary at the start of the operation. Further, even when the load is concentrated on one rope due to an unexpected situation, averaging can be achieved quickly, which is also useful for avoiding an accident in the event of an unexpected situation.

Therefore, in the method of the present invention for pulling by a multiple-winding winch, it is not necessary to devote much energy to the mounting accuracy of the winding drum, and a special control device is not required, so that a compact and inexpensive device can be manufactured. . In addition, the installation of the multiple-winding winch can be easily performed in a small space using a wire sling or the like as in the case of the single-winding winch.

[0031]

Next, an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1A shows a double-winding winch (endless type) winding drum of the present invention comprising two outer circumferential grooves, a grasping roller for each of the two outer circumferential grooves, and a sheave. 10 is shown. FIG. 1B is a cross-sectional view showing the periphery of one outer peripheral groove in A of FIG. 1A, and FIG. 1C is a sectional view showing the periphery of the other outer peripheral groove in B of FIG. FIG. 2 is a cross-sectional view showing substantially the same configuration as FIG.

First, the configuration of FIG. 1B will be described. Around the outer peripheral groove 1a provided on the winding drum 10, one end 3a is fixed to the case 15a, and the gripping roller 2a is connected in a chain shape; a sheave 4a;
a and a connecting post 6a for connecting the unfixed end of the grasping roller, and a guide post 5a that is fixed to a case that penetrates a slot 8a provided in both the overlapping portion of the sheave 4a and the connecting member 6a. , A roller 13a provided on the relaxation side 12a of the rope. Connecting member 6a and sheave 4
The elongated hole 8a is integrated with the pin 7a, and is displaced within a range in which the elongated hole 8a is allowed to move by the guide post 5a which stands and is fixed to the case 15a. The outer ring with which the rope of the sheave 4a contacts is rotatably mounted around the inner ring (the distinction between the inner ring and the outer ring is not shown). A rope introduction fitting 16a is also attached to the connecting member 6a to ensure the operation of introducing the rope into the outer circumferential groove via the tow port and the sheave.

Next, the operation when a load is applied to the pulling side 11a of the rope will be described. Rope pulling side 11
When "a" is towed, tension is applied to the rope, and the sheave 4a that comes into contact with the rope is displaced upward and left within the allowable range. Since one end of the connecting member 6a is connected to the sheave 4a by the pin 7a, the connecting member 6a is displaced upward and to the left following the displacement of the sheave. Since the other end of the connecting member 6a is connected to the other end of the grasping roller 2a in which a plurality of rollers are continuous in a chain shape having one end 3a fixed to the case, the above-described displacement causes the grasping roller 2a to surround the outer circumferential groove. Press

As a result, a pressing force N directed toward the center of the rotating shaft is generated, and it becomes possible to more reliably grasp the winding drum with respect to the rope. Approximately N = 0.1 between the pressing force N and the load W applied to the rope.
There is a relationship of 21 W, and the greater the load W, the greater the pressing force N, and therefore the greater the amount of penetration of the rope into the outer circumferential groove.

The structure in FIG. 1B and the function of each component are the same in FIG. 1C. That is, the amount of bite is reliably generated in each of the outer peripheral grooves 1a and 1b according to the tension of the rope.

The gripping rollers, sheaves, connecting members and the like for each of the outer circumferential grooves allow the rope to be more securely held on the winding drum, and a pressing force is applied by the holding rollers. You can bite it. As a result, the amount of bite of the rope is generated according to the load applied to the rope from the start of the towing, so that the load can be averaged in a shorter period of time after the start of the towing. Therefore, even if the load concentrates on a specific rope due to the occurrence of an unexpected situation, the load can be averaged quickly and an accident can be avoided.

(Embodiment 2) FIG. 2 is a conceptual diagram showing a configuration of a double-winding winch (endless type) of the present invention in which one winding drum is provided with two outer circumferential grooves. The outer peripheral groove is an upper wide groove in a cross section including the rotation axis, and the upward opening angle (the angle formed by a perpendicular line formed on the outer peripheral surface of the winding drum and the side surface of the outer peripheral groove) is as follows. 15-30
° is desirable. On the cross section including the rotation drive shaft of the winding drum, the distances D1 and D2 between the upper center and the lower center of the ropes 31 and 32 wound around the outer circumferential grooves 35 and 36 before the load is applied are formed. It is assumed that variations occur due to accuracy or the like. When D1 is larger than D2, the rope 31 has a higher towing speed, so that when the towing starts, a greater load is applied to the rope 31 than to the rope 32. For this reason, the rope 31 bites into the outer circumferential groove 35 more than the rope 32, and as a result,
The pulling speed of the rope 31 wound around the outer circumferential groove is the rope 32
, The load on the rope 31 decreases and the load on the rope 32 increases.

Thereafter, when the load on the rope 31 decreases,
The rope cross section is deformed and increased within the elastic range by an amount corresponding to the decrease in the load, and the planar contact portion between the rope and the outer peripheral groove side wall is reduced, so that the center of the rope cross section moves above the outer peripheral groove.
That is, the bite amount of the rope 31 decreases. The increase and decrease of the bite amount of the rope into the outer circumferential groove are repeated while decreasing the width of the increase and decrease.

As described above, when an imbalance occurs in the load applied to the two ropes, a self-healing difference occurs in the amount of biting of the rope into the outer circumferential groove. That is, the towing speed is adjusted by increasing the bite amount of the rope with a high load and decreasing the bite amount of the rope with a small load. As a result, the load on the heavily loaded rope is reduced, increasing the load on other too lightly loaded ropes. The increase / decrease in the amount of bite of the rope into the outer circumferential groove decreases in later steps, so that it roughly converges to the average value. However, when viewed precisely, the exchange of excess and deficiency with a small load continues. This exchange of excess and deficiency,
It can be considered that the imbalance such as the load has been corrected in a self-healing manner, not a size that is a problem in practical use.

(Embodiment 3) FIG. 3 shows a mode of use in Embodiment 3. In the present embodiment, the first embodiment
The winch of one winding drum having two outer circumferential grooves shown in (1) is mounted on the carriage 45, and the attachment of the gondola 46 is pulled by the two ropes 51 and 52.

By using the above device of the present invention,
The two ropes 51 and 52 can bear the load evenly without causing slack in either of the two ropes. As a result, since the gondola does not tilt, it is possible to improve the work efficiency of the worker and to thoroughly perform safe work. Further, since the load is not concentrated, the durability of the rope is also improved, and it is possible to contribute to the improvement of safety from the viewpoint of improving the durability of the device.

(Embodiment 4) FIG. 4 shows a mode of use in Embodiment 4. In the present embodiment, the first embodiment
The two winches provided with one winding drum having the two outer circumferential grooves shown in FIG.
Pull the rope on one end of each gondola. One of the two ropes for each winch, for example 61 or 7
1 is a rope for hanging a gondola, and the other rope 62
Or 72 is desirably a safety rope. However, both ropes may be used for hanging a gondola, and the load on the rope may be reduced by half. Also, the winch may be driven by one motor or two motors, but it is better to drive with one motor.
This eliminates the need for a control device, which is advantageous in terms of mounting space.

As described above, by using the multiple winch of the present invention, the load applied to one rope can be reduced by half, or if not reduced, one rope can be used as a safety rope, and the gondola is pulled. Can be performed in a highly safe state.

(Embodiment 5) FIG. 5 shows a mode of use in Embodiment 5. In the endless winch 90, one winding drum having two V-shaped outer peripheral grooves 81 and 82 includes a grasping roller, a sheave, and a connecting member (neither is shown) for each outer peripheral groove. Two are provided for each of the forward direction and the reverse direction. The carriage 86 reciprocates on the rail 87 by two ropes 91 and 92 pulled by the endless winch.

By using the double winch of the present invention, the left and right ends can be pulled at the same pulling speed by one winch. As a result, an inexpensive and compact bogie moving system can be constructed.

(Embodiment 6) FIG. 6 shows a mode of use in Embodiment 6. A winch 11 with one winding drum having three peripheral grooves (not shown) according to the present invention.
0 is suspended by a wire sling 107, and an annular heavy object or the work table 106 is pulled by the ropes 111, 112, and 113 wound around the respective outer circumferential grooves.

By using the above-mentioned multiple winch of the present invention, even a heavy object or a worktable having a shape that is difficult to balance, it can be wound around three outer peripheral grooves whose traction speeds are automatically adjusted. By being towed at three points by the rope, it is possible to easily tow while balancing. Therefore, it is possible to contribute to improvement of work efficiency and safety.

[0049]

Next, embodiments of the present invention will be described step by step.

A) Test for biting the rope into the outer circumferential groove First, a test for giving an indication of the amount of bite of the rope 131 into the outer circumferential groove 121 of the winding drum 130 will be described. FIG. 7A is a diagram showing an outline of the test, and FIG. 7B is an enlarged cross-sectional view taken along a plane perpendicular to the paper surface of a portion A in FIG. 7A. An 8 mm diameter rope 131 is fitted into the outer peripheral groove 121 of the endless winch winding drum 130 mounted on the V-block 137 of the universal testing machine, and the rope 131 is pushed into the outer peripheral groove by the pressing roller 139 attached to the universal testing machine. . In the above test, the load P applied to the rope 131 from the universal testing machine via the holding roller 139 and the displacement X of the holding roller 139, that is, the displacement X of the head of the universal testing machine are determined by the opening of the outer circumferential groove. It was measured at different angles.

Although the relationship between the displacement X and the load P is not strictly equivalent to the relationship between the amount of bite of the rope and the load of the rope, it can be used as a guide for these relationships. However, the displacement X when the load P was 0.2 kN was set to 0, and thereafter, the displacement was measured every time P was increased by 0.2 kN.

The results are shown in Table 1 and FIG.

[0053]

[Table 1]

Referring to FIG. 8, it can be seen that the displacement of the universal testing machine head increases as the load P increases, and that the displacement X increases as the opening angle decreases as the load P increases. Therefore, when the biting distance is changed in response to the change in the load, it is desirable to set the opening angle to be small. Specifically, the opening angle is 15 to 30
° is desirable.

B) Measurement of variation in the towing distance and towing speed of the outer circumferential groove Using a winch 150 having two outer circumferential grooves 141 and 142 provided on a winding drum sharing a rotary drive shaft,
Variations in the traction speed of the two outer grooves were measured. These outer peripheral grooves were V-shaped grooves having an opening angle of 20 °. Rope 15
1 and 152 have the same diameter of 8 mm and the same load of 67
0 kg was loaded. FIG. 9A shows a test state of the outer peripheral groove 141 on the motor 158 side.
(B) shows the state of the outer peripheral groove 142 on the side of the speed reducer 159. The winding drums provided with the outer peripheral grooves 141 and 142 were selected to be as equal as possible, and the mounting was considered so as to be the same. The measurement is performed as shown in FIG.
In the state of, take up for 35 seconds and measure the towing distance,
This was repeated 50 times to determine the average traction distance and the average traction speed.

Table 2 shows the results.

[0057]

[Table 2]

The difference in the traction distance between the outer peripheral grooves for 35 seconds was 66 mm. The difference in towing speed is 113m
m / min (1.886 mm / sec).

C) Verification test of automatic repairing action of multiple-winding winch When the load is towed with two ropes for the above-mentioned multiple-winding winch, the towing speed and load of each rope are automatically averaged automatically. We investigated whether it was done. In addition, when the averaging was performed, the details of how the averaging was performed and how much were averaged were also investigated.

FIG. 10 shows the measuring method of this test. The two ropes 151 and 152 having a diameter of 8 mm are connected to the outer groove 1 on the motor side.
41 and a reduction gear side outer peripheral groove 142 (in each case, the outer peripheral groove was V-shaped with an opening angle of 20 °), and a load of 670 kg was pulled. As shown in FIG. 10, the load is reciprocated between the traction distances of 7 m, and the evaluation of the averaging is performed by the tension meter 156 attached to the rope 151 on the motor side at the upper part, the central part (during the ascent and descent), and the lower part. This was done by measuring the tension on the rope. As the tensiometer, a type that reads the amount of deformation (strain) of the tensiometer main body with a dial gauge was used.

At the start of the test, the rope 152 on the reduction gear side is set to be about 15 cm longer, and the rope 152 on the motor side is set.
1 was made to bear the entire load.

The results are shown in Table 3 and FIG.

[0063]

[Table 3]

Referring to FIG. 11, rope 1 was used at the start of the test.
The load concentrated on 51 was averaged from the first week, but was rapidly averaged from the third cycle, and became steady state from the seventh week, and the load was very close to the average value of 335 kg. This is because the rope 151 bites into the outer circumferential groove on the motor side as described above, the towing speed is reduced, and the load can also be borne by the rope 152 on the partner side.
Therefore, if the compound winch of the present invention is used, the processing of the outer circumferential groove and the mounting accuracy of the winding drum vary, and even if the initial rope length is not uniform, each rope is automatically operated during the compound winch operation. Load and traction speed can be averaged. In addition, even if it is averaged, the reason why the rope 151 is slightly overloaded finally is that the length of the rope 151 is set to be 15 cm longer than the rope 152 at first.

Therefore, according to the multiple-winding winch of the present invention, it is not necessary to concentrate on improving the processing accuracy of the outer circumferential groove and the mounting accuracy of the winding drum, and a special control device is not required. Can be provided. In use, no special consideration is required simply because it is a multi-winding winch, and it can be easily installed in a small space using a wire sling or the like.

Although the embodiments of the present invention have been described above, the embodiments of the present invention disclosed above are merely examples, and the scope of the present invention is limited to the above embodiments of the present invention. Not something. The scope of the present invention is:
It is indicated by the description of the claims, and is intended to include all modifications within the meaning and scope equivalent to the description of the claims.

[0067]

According to the double winch of the present invention, 1
By attaching multiple ropes to the winding drum of the book,
It is possible to automatically average the towing speed and load of each rope without adding a special control device, etc.
It is possible to provide a compact double-winding winch with improved work efficiency and safety at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram showing a multiple-turn winch according to a first embodiment.

FIG. 2 is a conceptual diagram of a multi-turn winch according to a second embodiment.

FIG. 3 is a diagram illustrating a use mode according to a third embodiment.

FIG. 4 is a diagram illustrating a use mode according to a fourth embodiment.

FIG. 5 is a diagram showing a use mode according to a fifth embodiment.

FIG. 6 is a diagram showing a use mode according to a sixth embodiment.

FIG. 7 is a schematic diagram of a test method a) in an example.

FIG. 8 is a view showing a result of a test method a) in an example.

FIG. 9 is a schematic diagram of a test method b) in an example.

FIG. 10 is a schematic diagram of a test method c) in an example.

FIG. 11 is a view showing a result of a test method c) in an example.

FIG. 12 is a view showing a conventional endless winch.

FIG. 13 is a view showing a conventional winding drum type winch.

FIG. 14 is a diagram showing a problem caused by a conventional multiple-turn winch.

[Explanation of symbols]

10, 130 drums 11a, 11b, 12a, 12b, 31, 32, 51,
52, 61, 62, 71, 72, 91, 92, 111,
112, 113, 131, 151, 152 Rope 1a, 1b, 35, 36, 81, 82, 121, 14
1,142 Outer peripheral groove 2a, 2b Grasping roller 3a, 3b Grasping roller fixed end 4a, 4b Sheave 5a, 5b Guide post 6a, 6b Connecting member 8a, 8b Slot 45 Dolly 46 Gondola

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-273288 (JP, A) JP-A-9-52694 (JP, A) JP-A-4-338087 (JP, A) JP-A-54- 136058 (JP, A) Japanese Utility Model Showa 62-133594 (JP, U) Japanese Utility Model Showa 64-45692 (JP, U) Registered Utility Model 3015293 (JP, U) Registered Utility Model 3015292 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) B66D 1/26 B66D 1/36 B66D 1/44 B66D 1/74

Claims (5)

(57) [Claims] 1. A winding drum having first and second outer peripheral grooves separated from each other and rotatably supported by a case, and being wound around the first outer peripheral groove and extending one of the first and second outer peripheral grooves. A first rope having a portion serving as a traction side for receiving a load and the other extension portion serving as a relaxation side; being wound around the second outer circumferential groove, one extension portion serving as a traction side for receiving a load; A second rope having an extended portion on a relaxed side, and the first rope being grasped by pressing the first rope against the first outer circumferential groove, one end of which is fixed to a case, and one end of which is fixed to the case. From the first to the first rope lead-out side along the outer periphery of the winding drum
A grasping roller for guiding a portion of the first rope on the traction side to the first outer circumferential groove, and supported by a case so as to be displaceable according to a load applied to the first rope on the traction side; A first sheave, connecting the first sheave and an end of the first grasping roller to which the first gripping roller is not fixed, and connecting the first rope to a first outer circumferential groove in accordance with displacement of the first sheave; A first connecting member for applying a pressing force to the first grasping roller, and the second rope is grasped by pressing the second rope against the second outer circumferential groove, one end of which is fixed to the case. And a second line disposed along the outer periphery of the winding drum from one end thereof toward the second rope outlet side.
A grasping roller for guiding a portion of the second rope on the traction side to the second outer circumferential groove, and supported by a case so as to be displaceable according to a load applied to the second rope on the traction side; A second sheave, for connecting the second sheave and an end of the second gripping roller to which the second gripping roller is not fixed, wherein the second rope is connected to a second outer circumferential groove in accordance with displacement of the second sheave; A second connecting member for applying a force for pressing to the second grasping roller,
Endless double winch. 2. A method imbalances traction speed and load generated between the first rope and the second rope, further comprising means for adjusting in accordance with the degree of imbalance of the load, according to 請 Motomeko 1 Endless double winch. 3. The first outer peripheral groove and the second outer peripheral groove are tapered in a cross section including a center axis of the winding drum so as to decrease in width from an outer surface to an inner surface of the winding drum. Even when the width of the bottom of the outer circumferential groove and the bottom of the second outer circumferential groove is the widest, when the first rope and the second rope bite into the respective outer circumferential groove, the bottom of the outer circumferential groove does not make surface contact with the rope. The first rope and the second rope bite into the respective outer circumferential grooves according to the magnitude of the respective loads, and the towing speed and the pulling speed generated between the first rope and the second rope due to the bite amount. adjusting the load imbalance, endless type double-wound winch according to 請 Motomeko 2. 4. A part that is rotatably supported by a case and is separated from each other.
One winding drum having a plurality of separated outer circumferential grooves; and a rope wound around each of the plurality of outer circumferential grooves, one of which is a traction side receiving a load and the other is a relaxation side. a endless type multi-winding winch comprising, when a large load of a specific rope, increasing the bite amount of the rope to the circumferential groove in which the rope is wound,
When the load on the other rope is reduced by reducing the towing speed of the rope and reducing the load, and when the load on the particular rope is reduced, the amount of bite of the rope is reduced and the towing speed of the rope is increased to increase the load. Endless multi-winding winch with means for adjusting the traction speed and load imbalance between the ropes, increasing the load on other ropes. 5. A part which is rotatably supported by a case and is separated from each other.
A winding drum having a plurality of separated outer circumferential grooves; and a rope wound around the winding drum, one extension of which is a traction side receiving a load, and the other extension of which is a relaxation side. Endless for each outer circumferential groove
A traction method according to formula double winding winch, a grasping rollers to grasp the rope by pressing the rope on its outer circumferential groove, said grasping roller by portions which is towed side so as to be grasped of the rope A sheave that guides a rope to the outer peripheral groove and applies the pressing force to the grasping roller in accordance with a load applied to the rope on the towing side is provided for each outer peripheral groove, and each of the ropes corresponds to a load applied to the rope. wherein changing the pulling speed of the rope by changing the amount of biting into the outer peripheral groove to adjust the imbalance load on the rope, to average the traction speed and load between multiple ropes, endless towing method according to formula double-winding winch.