JPH092786A - Traction winch - Google Patents

Abstract

PURPOSE: To provide a traction winch whose installation area can be decreased, and in which the structure is simple and a rope can be beautifully wound. CONSTITUTION: A rope W (a part indicated by a character B in the figure) extending from a winch main body 20 is guided by first to third pulleys 44, 45, 52, detours around the periphery of a winding drum 30 approximately one round and then is wound by the winding drum 30. Therefore, the distance between the winch main body 20 and the winding drum 30 can be narrowed. When the position in which a rope W (a part indicated by a character E) is wound on the winding drum 30 is changed to the axial direction of the winding drum 30, the third pulley 52 is slid on a slide shaft 51, an oscillating frame 40 is oscillated around an oscillation shaft R, the second pulley 45 is also displaced in the axial direction of the winding drum 30, and therefore, the fleet angle can be held to the minimum extent.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traction winch, and more particularly to a technique for improving a traction winch so that the installation space can be reduced.

[0002]

2. Description of the Related Art At a construction site of a skyscraper or a deep structure, it is essential to use a winch having a high lift of several hundred meters to a maximum of 1,000 meters. As such a winch with a high lift, for example, an actual Kaihei 3-890
There is a winch described in Japanese Patent Publication No. 89. As shown in FIGS. 5 and 6, the winch 1 includes a winch body 2 and a winding drum 3. Winch body 2
Has a pair of winch drums 5 and 6 which are driven to rotate by a motor 4 and are parallel to each other. Then, the rope W for hoisting the construction material is wound a plurality of times between the pair of winch drums 5 and 6, and the rope W is wound up or down by the friction generated between the rope W and the winch drums 5 and 6. It has become. On the other hand, the winding drum 3
Has a drum 8 rotatably driven by a winding drum drive motor 7, and is adapted to wind up a rope W extending from the winch body 2. This type of winch 1 is also called an endless winch because the higher the rope winding capacity of the winding drum 3 is, the larger the lifting capacity is. It is also called a traction winch because the rope is wound up or down by the friction generated between the rope W and the winch drums 5 and 6.

[0003]

By the way, the rope W extending from the winch body 2 starts to be wound from one end side of the winding drum 3 in the axial direction. And
The position where the rope W is wound is displaced in the axial direction of the rope winding drum 3 as the length that is wound is increased. As a result, as shown in FIG. 6, the angle formed by the rope W extending from the winch body 2 with respect to the direction perpendicular to the axis of the winding drum 3, that is, the value of the fleet angle θ changes. In order to align and wind the rope W on the rope winding drum 3, the value of the fleet angle θ is preferably 2 degrees or less. However, winch 1
The higher the lifting capacity is, the longer the axial length of the winding drum 3 is. Therefore, in order to keep the value of the fleet angle θ at 2 degrees or less, the distance between the winch body 2 and the winding drum 3 is increased. There is no choice but to increase L, and the area required for installing the winch 1 is significantly increased.

In order to solve this problem, there is a winch equipped with a guide device for guiding the rope W so that the rope W can be wound up neatly in alignment with the winding drum 3. However, these guide devices have complicated mechanisms such as a feed screw that is driven to rotate by an electric motor.

Therefore, an object of the present invention is to solve the problems of the prior art and to reduce the installation area, as well as to have a simple structure and to be able to wind the rope neatly. To provide.

[0006]

SUMMARY OF THE INVENTION The above objects of the present invention are as follows.
A pair of drums (21, 2,
2) A winch body (20) in which a rope (W) is wound plural times, a winding drum (30) for winding the rope (B) extending from the winch body (20), and a winding drum (30). 30) and a base (10) for fixing the winch body (20), and a rope (W) which is arranged around the winding drum (30) and extends from the winch body (20). The rope (W) is guided so as to be wound around the winding drum (30) after extending around the circumference of the winding drum (30), and is displaceable in the axial direction of the winding drum (30). This can be achieved by a traction winch (100) characterized in that it comprises a plurality of pulleys (44, 45, 52) supported on a base (10).

[0007]

In the traction winch of the present invention, since the rope extending from the winch body extends so as to bypass the periphery of the winding drum, the space between the winch body and the winding drum can be narrowed, and the installation space can be reduced. can do. Also, since the pulley that guides the rope extending from the winch body is displaceable in the axial direction of the winding drum, if the position where the rope is wound around the winding drum is displaced in the axial direction, the pulley will It is displaced in the axial direction by receiving the component force of. As a result, the fleet angle of the rope with respect to the winding drum can be kept small.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a traction winch according to the present invention will be described in detail below with reference to the drawings. here,
1 is a front view of a traction winch according to an embodiment of the present invention with a main part broken away, FIG. 2 is an overall plan view of the traction winch shown in FIG. 1, and FIG. 4 and 5 are front views showing the main part of another embodiment of the traction winch according to the present invention in a cutaway manner.

As shown in FIG. 1, a traction winch 100 according to the present embodiment includes a base 10, a winch body 20 fixed to the base 10, and a rope winding drum 30.
And a swing frame 40 swingably supported by the base 10 on the side of the rope winding drum 30 opposite to the winch body 20, and disposed between the winch body 20 and the rope winding drum 30. And the slide pulley 50 that has been set.

The base 10 is manufactured by combining shape steels as shown in FIG. 1. A winch body 20 is provided on the upper right side of the figure, and a winding drum 30 is provided on the left side of the figure. Fixed parallel to each other. Further, the rocking frame 4 is provided on the vertical wall 11 at the left end portion in the figure.
0 is supported. The side wall 12 on which the roller 46 provided at the lower end of the swing frame 40 rolls is attached to the vertical wall 11.

The winch body 20 comprises a pair of winch drums 21 and 22 which are parallel to each other and both winch drums 2
A drive motor 23 and a gear mechanism 24 that rotate and drive the wheels 1 and 22 and a rotary encoder 25 that detects the rotation speed of the winch drum 22 are provided. On the outer peripheral surfaces of the winch drums 21 and 22, a plurality of rope grooves (not shown) are recessed. Both winch drums 21,22
The rope W wound between them is guided by these rope grooves and, as shown in FIG. 2, extends to the load side.
Extends from the upper end portions of the winch drums 21 and 22 in the figure toward the right side in the figure. On the contrary, the rope W (the portion indicated by the symbol B in the drawing) extending toward the rope winding drum 30 side extends from the upper end portions of the winch drums 21 and 22 in the figure toward the left side in the figure. The rope W is
Only one layer is wound around both winch drums 21 and 22. As a result, the ropes do not bite into each other even when a hoisting load is applied to the rope W, as in the case of multi-layer winding, and the abrasion thereof is extremely small. Also, the rope tension and rope speed can be kept constant over the entire rope length. The drive motor 23 is inverter-controlled, so that not only can the rotation speed be changed according to the usage situation, but also shocks during acceleration / deceleration can be alleviated. Further, the rotation of the winding drum 30 can be synchronized with the timing so that the slack and the bounce of the rope W can be prevented.

The winding drum 30 is a winch body 20.
Large-diameter drum 3 arranged in parallel with the drums 21 and 22 of
1 and a drive motor 32 that rotationally drives the drum 31. The drum 31 is the winch body 2
The rope W extending from 0 (the portion indicated by the symbol B in the drawing) is positioned and fixed to the base 10 so as to pass through the upper portion of the central portion of the drum 31 in the axial direction.

The rocking frame 40 is a member manufactured by bending a steel plate to have a U-shaped cross section.
On the side opposite to the winch body 20, it is arranged so as to extend in the vertical direction. The upper end of the bearing 41 is attached to the upper end of the vertical wall 11 of the base 10.
Is fixed to the hollow shaft 42 that is rotatably supported by, and is thus swingable around the axis R of the hollow shaft 42. The axis R extends horizontally and in a direction perpendicular to the rotation axis of the winding drum 30. Further, in the present embodiment, it is coaxial with the portion of the rope W extending from the winch body 20 (the portion indicated by the symbol B in the drawing). The length of the swing frame 40 is set so that its lower end is located below the lower end of the winding drum 30. A roller 46 that rolls on the side plate 12 provided on the vertical wall 11 of the base 10 is attached to the lower end of the swing frame 40. Further, the upper end of the swing frame 40 is extended upward,
A counterweight 47 for balancing the moment of inertia is attached so that the swing frame 40 can stand still in a state of being inclined at an arbitrary angle around the swing axis R.

At the upper and lower ends of the swing frame 40, the first
The second pulleys 44 and 45 are rotatably supported. The first pulley 44 engages with the rope W inserted through the hollow shaft 42, and changes the direction of the rope W so that the rope W extends in the longitudinal direction of the swing frame 40. On the other hand, the second pulley 45 engages with the rope W (the portion indicated by the symbol C in the drawing) extending in the longitudinal direction of the swing frame 40, and the rope W passes under the winding drum 30. , The direction is changed so as to be directed to the winch body 20 side.

The slide pulley 50 is disposed below the winch body 20 and the rope winding drum 30, and is supported by the base 10 so as to extend parallel to the rotation axis of the winding drum 30. A moving shaft 51 and a third pulley 52 that is fitted onto the sliding shaft 51 so as to be rotatable and slidable in the axial direction are provided. The third pulley 52 changes its direction so that the rope W (the portion indicated by the symbol D in the drawing) extending from the second pulley 42 extends toward the rope winding drum 30.

Next, regarding the operation of the traction winch 100 of the present embodiment constructed as described above, the rope W
An example will be described in which the roll is wound. The rope W for hoisting construction materials and the like is wound a plurality of times between the winch drums 21 and 22 of the winch body 20 (portion indicated by symbol A in the figure). When the winch drums 21 and 22 are rotationally driven by the drive motor 23, tension is generated on the rope W by the frictional force generated between the rope W and the winch drums 21 and 22, and the rope W is wound up. The rope W extending from the winch body 20 (the portion indicated by the symbol B in the drawing) is inserted into the hollow shaft 42 that pivotally supports the swing frame 40, and then the direction thereof is changed by the first pulley 44 to make the second change. Towards the pulley 45 (reference numeral C in the figure)
Part shown with). Then, the rope W is further changed in direction by the second pulley 45 and extends toward the third pulley 52 (a portion indicated by a symbol D in the drawing). Furthermore, the rope W
After being direction-changed by the third pulley 52 (portion indicated by reference symbol E in the figure), it is wound on the winding drum 30 (portion indicated by reference symbol F in the figure).

As the rope W is wound around the winding drum 30, the position where the rope W (E portion) is wound around the winding drum 30 is reciprocally displaced in the axial direction of the winding drum 30.
Along with this, the third pulley 52 receives the component force of the tension acting on the rope W and is reciprocally displaced on the sliding shaft 51 in the axial direction thereof. When the third pulley 52 is displaced on the sliding shaft 51 in the axial direction, the second pulley 45 attached to the lower end of the swing frame 40 applies a component force of the tension acting on the rope W (D portion). The receiving and winding drum 30 is displaced in the axial direction. As a result, the second pulley 45, that is, the lower end portion of the swing frame 40 swings around the swing axis R of the hollow shaft 42. However, the swing frame 4
Since the swing axis R of 0 is coaxial with the rope W (B portion) extending from the winch body 20, the swing frame 4
Even if 0 swings, the rope W (part B) is not
It does not come off.

Further, since a roller 46 rolling on the side plate 12 provided on the vertical wall 11 of the base 10 is attached to the lower end of the swing frame 40, the second pulley 45 is attached.
Even if the tension of the rope W acts on the rocking frame 40, the rocking frame 40 can easily rock. Furthermore, the swing frame 40
A counterweight 47 is attached to the upper end of the rocking frame 40, and the swing frame 40 can be stopped in a state of being tilted at an arbitrary angle. As a result, the swing frame 40 is
It does not always extend in the vertical direction, and it is possible to completely follow the displacement of the third pulley 52, and it is possible to prevent the fleet angle from increasing.
Further, when the rope W (the portion indicated by E) is wound toward the center of the winding drum 30, the force toward the center does not act on the rope W, so that the rope interval is not widened and the rope W is wound neatly. To be turned.

That is, in the traction winch 100 according to the first embodiment, the swing frame 40 is arranged so as to follow the change in the position where the rope W winds around the winding drum 30.
Since the oscillates, the fleet angle of the rope W with respect to the winding drum 30 can always be kept to the minimum. As a result, not only can the rope W be wound in a state of being neatly aligned on the winding drum 30, but also the rope W can be wound.
It is also possible to prevent a step drop. Further, in the traction winch 100 of the present embodiment, the rope W extending from the winch body 20 includes the first to third pulleys 4
Since it is guided by 4, 45 and 52 and extends so as to make a roundabout around the winding drum 30, the space between the winch body 20 and the winding drum 30 can be narrowed.

The traction winch of the present invention is
It is needless to say that the present invention is not limited to the above-described embodiments, and various modifications can be made based on the gist of the present invention. For example, as in the traction winch 200 shown in FIG.
If the rocking frame 140 is arranged so as to extend horizontally as well as above 0, the installation area can be further reduced. In addition, the swing frame 14
By arranging 0 so as to extend horizontally, the counterweight for canceling the moment of inertia of the swing frame 140 becomes unnecessary.

In the above-described embodiment, the swing frame 40 is used to support the second pulley 45 so that it can be displaced in the axial direction of the winding drum 30. The second pulley 45 may have the same structure as the slide pulley 50. However, if all the pulleys are slide pulleys, it may be necessary to increase the number of pulleys. In other words, the swing frame 40 can be said to be a mechanism that can keep the fleet angle small with a small number of pulleys.

[0022]

Since the traction winch of the present invention is constructed as described above, the swinging frame swings so as to follow the change in the position where the rope winds around the winding drum, and the winding drum. The fleet angle of the rope against can always be kept to a minimum. As a result, not only can the rope be wound in a state in which the rope is neatly aligned on the winding drum, but also the drop of the rope can be prevented. Further, since the swing frame has an extremely simple structure that does not need to be driven using a motor or the like, the structure of the entire traction winch can be simplified. In addition, the rope extending from the winch body is guided by the first to third pulleys to detour around the take-up drum by about one round, so that the interval between the winch body and the take-up drum should be narrowed. The installation space can be reduced. Therefore, according to the present invention, it is possible to provide a traction winch which not only has a small installation area, but also has a simple structure and can wind up a rope neatly.

[Brief description of drawings]

FIG. 1 is a front view showing a main part of a traction winch according to an embodiment of the present invention in a cutaway manner.

2 is an overall plan view of the traction winch shown in FIG. 1. FIG.

FIG. 3 is a left side view of the traction winch shown in FIG.

FIG. 4 is a front view showing a main part of another embodiment of a traction winch according to the present invention in a cutaway manner.

FIG. 5 is a front view showing a main part of a conventional traction winch in a cutaway manner.

FIG. 6 is a plan view of the traction winch shown in FIG.

[Explanation of symbols]

 W Rope 1 Conventional traction winch 2 Winch body 3 Rope winding drum 4 Winch drive motor 5,6 Winch drum 7 Winding drum drive motor 8 Winding drum 10 Base 20 Winch body 21,22 Winch drum 23 Drive motor 24 Gears Mechanism 25 Rotary Encoder 30 Rope Winding Drum 31 Drum 32 Drive Motor 40 Pulley Support Frame 41 Bearing 42 Hollow Shaft 43 Body Part 44 First Pulley 45 Second Pulley 46 Roller 47 Counterweight 50 Sliding Pulley 51 Sliding Shaft 52 Number Three pulleys

Claims (4)

[Claims] 1. A winch body (20) in which a rope (W) is wound a plurality of times between a pair of drums (21, 22) which are rotationally driven and are parallel to each other, and a rope which extends from the winch body (20). Winding drum (30) for winding B)
A base (10) for fixing the winding drum (30) and the winch body (20), and the winch body (2) disposed around the winding drum (30).
0) is a rope (W) extending from the winding drum (3).
0) after extending around the periphery of the winding drum (3)
0), and a plurality of pulleys (44, 45, 5) that guide the rope (W) so as to be displaceable in the axial direction of the winding drum (30) and supported by the base (10).
2) A traction winch (100) comprising: 2. A shaft (42) provided on the base (10) extending in a direction perpendicular to an axis of the winding drum (30).
Further, a swinging frame (40) having one end fixed to and swingably supported is provided, and one (45) of the plurality of pulleys (44, 45, 52) is provided with the swinging frame (40). The traction winch according to claim 1, wherein the traction winch is attached to a swing end side of the moving frame (40). 3. An end portion of the swing frame (40) on the base end side is extended to the side opposite to the end portion on the swing end side, and the swing frame (40) is provided with a swing shaft ( R) to be able to stand still while tilting at any angle
The traction winch (100) according to claim 2, wherein a counterweight (47) for balancing the moment of inertia around the swing shaft (R) is attached to the base end side. 4. The winch body (2) is provided with the shaft (42).
0) and a hollow shaft (42) coaxial with the axis of the rope (W), and the rope (W) extending from the winch body (20) is inserted into the hollow shaft (42). One end (44) of the plurality of pulleys (44, 45, 52) is engaged with the rope (W) inserted in the hollow shaft (42) so that the proximal end of the swing frame (40). Traction winch (100) according to claim 3, characterized in that it is mounted on the side.