JP2003292290A - Winch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve a slack and disordered phenomenon of a wire or a rope w wound on a winding drum 3, caused by the inertial rotation of the winding drum 3 in a winch wherein the winding drum 3 is mounted to a drum support base 1, and a motor 4, an electromagnetic brake 5, a speed reducer 6 and an electromagnetic clutch 7 related to the winding drum 3 are mounted inside the winding drum 3. <P>SOLUTION: This winch is provided with a pressure roller 21 for pressing the wire or rope w wound on a winding outer peripheral surface s of the winding drum 3, to the winding outer peripheral surface s and regulating the free rotation of the winding drum 3 by this pressing. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a winch which is particularly useful for lifting anchors of small vessels.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 7-297 filed by the present applicant
No. 51 discloses the following winch, that is, a winding drum is mounted on a drum support so as to be rotatable around a specific axis, and the winding drum is installed in the winding drum. A motor for rotating, an electromagnetic brake for preventing rotation of the motor, a speed reducer for decelerating the rotation of the motor and transmitting the rotation to the winding drum, an output portion of the speed reducer, and the winding drum. An electromagnetic clutch for connecting and disconnecting the interlocking connection with the winding drum is installed, and a traverser for aligning a wire or rope (hereinafter, simply referred to as “wire”) wound around the winding drum is formed. The traverser is configured to transmit the output rotation of the speed reducer by chain transmission.

[0003]

In the conventional winch described above, when the electromagnetic clutch is disengaged, the winding drum becomes rotatable about a specific axis. Under this condition, When the wire wound on the winding drum is suddenly pulled out, the winding drum is rotated at high speed by its pulling force. Even if the wire is stopped from pulling out during the high speed rotation, the winding drum is rotated. The inertial force causes the wire to continue its rotation for a while, and this continuous rotation unnecessarily loosens and disturbs the wire wound on the winding drum, and then the wire is wound by the winding drum. There is a possibility that the processing and the withdrawal processing may become unstable.

When the rapid withdrawal of the wire is suddenly stopped, the wire may jump suddenly to disturb the wire wound on the winding drum, and in this case, the same problem as described above may occur. .

It is an object of the present invention to provide a novel winch in which the above problems are solved by a simple means while maintaining the conventional winch structure.

[0006]

In order to achieve the above object, according to the present invention, as described in claim 1, the winding drum is mounted on the drum supporting base so as to be rotatable about a specific axis and the winding drum. A motor for rotating the winding drum, an electromagnetic brake for blocking the rotation of the winding drum, a speed reducer for decelerating the rotation of the motor and transmitting the rotation to the winding drum, and an output part of the speed reducer. In a winch, which is equipped with an electromagnetic clutch for connecting and disconnecting the interlocking connection with the winding drum, and further formed with a traverser for aligning the wires wound on the winding drum, A wire wound around the winding outer peripheral surface of the winding drum is pressed against the winding outer peripheral surface, and this pressing restricts free rotation of the winding drum. Structure and form of the pressing roller is provided with

According to this, even when the braking action of the electromagnetic brake does not act on the take-up drum and the interlocking connection by the electromagnetic clutch is disengaged, the take-up drum is still operated by the pressing roller. Since the free rotation is restricted, even if the wire wound around the winding drum is suddenly pulled out and the winding drum is rotated at a high speed, when the wire is stopped to be pulled out, the winding is stopped. The rotation of the drum will be stopped immediately. Further, since the pressing roller presses the wire on the winding outer peripheral surface of the winding drum, the wire wound on the winding drum can be wound tightly and tightly in an orderly manner.

Each of the above inventions may be embodied as follows, that is, since the drum support rotatably supports each end of the winding drum as described in claim 2. A pair of side support parts of which a corresponding one of a pair of arm members is pivotally attached to each of these side support parts via a fulcrum shaft oriented parallel to the specific axis. The pressing roller having a length substantially matching the width of the winding peripheral surface is mounted between the front portions through a shaft member oriented parallel to the specific axis. According to this, the pressing roller uniformly and surely presses the wire wound around the winding drum onto the winding outer peripheral surface.

According to a third aspect of the present invention, the pressing roller is located between the winding outer peripheral surface and the traverse shaft of the traverser. According to this
The pressing roller acts so as to accurately and stably wind and pull out the wire with respect to the winding drum.

[0010]

1 is a plan view of a winch according to the present invention,
FIG. 2 is a side view of the winch without winding the wire, and FIG. 3 is a side view of the winch with the wire wound.

In the figure, reference numeral 1 is a drum support, which is provided with a pair of left and right side support portions 1a and 1b which are connected by a horizontal connecting rod. Each side support portion 1a and 1b has a floor connecting member 2a at its lower end. 2b is fixed. 3 is these side support parts 1
The winding drum is rotatably supported on a and lb about a specific axis x. The winding drum 3 has a winding cylindrical portion 3
A pair of disk members 3b and 3b are fixed to both ends of a.

Therefore, a motor 4 for rotating the winding drum 3, an electromagnetic brake 5 for preventing the rotation of the motor 4 and a rotation of the motor 4 are decelerated inside the winding drum 3. A speed reducer 6 for transmitting the power to the winding drum 3 and an electromagnetic clutch 7 for disconnecting the interlocking connection between the speed reducer 6 and the winding drum 3 are installed.

At this time, the electromagnetic brake 7 is not deenergized to prevent the motor from rotating and is deenergized when energized. The electromagnetic clutch is disengaged when energized and disengaged when energized. Make something.

Reference numeral 9 is a traverser for reciprocally displacing the wire w wound up or drawn out from the winding drum 3 to the left and right, and a pair of left and right side supporting portions 1a, 1b.
A traverse shaft 9a rotatably mounted in a fixed position in the vicinity of the front side of the winding drum 3 in parallel with the specific axis x, and a traverse body 14 fitted onto the traverse shaft 9a. The line guide 17 formed at the bottom of the body 14 is provided.

The traverse shaft 9a is adapted to rotate in conjunction with the winding drum 3 at a constant rotation ratio, and is specifically as follows. That is, a relatively small driving side sprocket 11 is attached to the shaft portion 10 which is rotated together with the winding drum 3.
On the other hand, a relatively large driven side sprocket 12 is fixed to one end of the traverse shaft 9a, an endless chain 13 is hung between these two sprockets 11 and 12, and a tension (not shown) is provided near the chain 13. A sprocket is provided, and the tension sprocket tightens the chain 13.

The traverse body 14 is composed of two guide rods 1 installed between the upper front portions of the pair of left and right side supporting portions 1a and 1b.
It is guided by 5 and 16 so as to be slidable in the left and right directions.

The line guide 17 is the traverse body 1.
4 Under the condition of being arranged between the pair of left and right overhanging portions 14a, 14a which are extended downward from the left and right ends of the lower portion, the guide rod 16 is externally slidably displaced in the left and right direction. A lateral guide roller 18 is provided, and vertical support shafts 19a, 19a are extended from the traverse body left and right portions 14b, 14b which are the front sides of the pair of left and right overhanging parts 14a, 14a, and the vertical support shafts 19a, 19a are provided. Vertically mounted rollers 19 and 19 are rotatably attached to the
Further, a U-shaped guide member 20 is fixed between the lower ends of the left and right vertical support shafts 19a, 19a in a erected manner.

Reference numeral 21 denotes a lateral pressing roller located between the winding outer peripheral surface s of the winding drum 3 and the traverse shaft 9a, and the wire w wound around the winding outer peripheral surface s. The winding outer peripheral surface s is pressed, and the free rotation of the winding drum 3 is restricted by this pressing.

The supporting mechanism for the lateral pressing roller 21 has an arm member 23 pivotally attached to each of the front portions of the pair of left and right side supporting portions 1a and 1b via a fulcrum shaft 22 oriented parallel to the specific axis x. , The pair of arm members 23, 23
A lateral support shaft 24 is fixedly installed between the front ends of the horizontal support shafts 24, and the lateral press roller 21 having substantially the same length as the winding outer peripheral surface s is attached to the lateral support shaft 24 in a relatively rotatable external fitting form. In addition, the left and right arm members 23, 2
Protrusions 25, 25 are provided at the base of 3 and the respective protrusions 25, 2
5, tension springs 26, 26 are stretched between the corresponding side supporting portions 1a, 1b, and the elastic force of the tension springs 26, 26 attaches the lateral pressing roller 21 to the side close to the specific axis x. It has a vibrant composition.

At this time, it is preferable to use a member having a small friction coefficient for the lateral pressing roller 21. For example, when the rope is wound around the winding drum 3, it is preferably formed of a synthetic resin material. Alternatively, it may be mounted on the lateral support shaft 24 via a bearing in a state of low rotational resistance.

The winch according to the present invention configured as described above is fixed to the bow of a small boat, for example, and is used for lifting and lowering the anchor. In this use, the wire w wound around the winding drum 3 is composed of the guide roller 18 of the line guide 17, the left and right vertical rollers 19 and 19 and the U-shaped guide member 20 as shown in FIGS. The anchor is connected to the tip of the wire W while being inserted into the enclosed space, and it is preferable that the winch can be operated by one lever in the steering room.

The use example and operation thereof in this case will be described below. When the anchor is lifted, the electromagnetic clutch 7 is not energized and only the electromagnetic brake 5 and the motor 4 are energized.
The output shaft of the motor 4 is rotated to the hoisting side.

The rotation of the motor 4 causes the take-up drum 3 to rotate via the speed reducer 6 and the electromagnetic clutch 7, the traverse shaft 9a to rotate via the sprockets 11 and 12 and the chain 13, and the traverse shaft 9a to rotate. Is a traverse body 14 and a line guide 17 of the same body
Is reciprocally displaced along the traverse shaft 9a, whereby the wire w passes through the line guide 17 and is pressed against the winding outer peripheral surface s of the winding drum 3 by the pressing roller 21 so that the wire w is regularly wound while being tightened. The anchor will be lifted from the sea.

On the other hand, when the anchor is lowered, when the electromagnetic clutch 7 is energized to cut off the output shaft, the winding drum 3 is rotated in the reverse direction, and the line guide 17 is reciprocated in the opposite manner. Due to the displacement, the wire w is regularly paid out in accordance with the rotation of the motor 4, and the anchor descends into the sea at a speed substantially equal to that at the time of lifting.

On the other hand, when the hoisting and lowering of the anchor is stopped midway, the electromagnetic brake 5, the motor 4 and the electromagnetic clutch 7 are not energized, so that the electromagnetic brake 5 acts as an output shaft of the motor 4. While the rotation is blocked, the electromagnetic clutch 7 is in a state in which the winding drum 3 is connected to the output shaft of the rotation-blocked motor 4, so that the rotation of the winding drum 3 is blocked by the braking force of the electromagnetic brake 5. , The anchor will be stopped in the middle of unloading.

Further, when the anchor is rapidly dropped under its own weight, only the electromagnetic clutch 7 is energized, whereby the winding drum 3 is disconnected from the interlocking connection with the output portion of the speed reducer 6 and is free to move. In the rotating state, the wire w is rotated at a high speed by the tensile force acting on the wire w, and the line guide 17 is also reciprocally displaced in association with the rotation of the winding drum 3. Therefore, the wire w is regularly fed out, and the anchor is caused by its own weight. It will fall rapidly. When the anchor that drops like this reaches the seabed,
Although the tensile force does not act on the wire w, the winding drum 3 tries to continuously rotate due to its own rotational inertia.
However, since the pressing roller 21 presses the wire w wound on the winding outer peripheral surface s of the winding drum 3 to impart rotational resistance to the winding drum 3, when the tensile force of the wire w disappears, The rotation of the winding drum 3 is immediately stopped. Therefore, due to the inertial rotation of the winding drum 3, the conventional phenomenon in which the wire w wound around the winding drum 3 is relaxed and disturbed does not occur, and when the tensile force of the wire w disappears, the wire w loses its own tensile force. The wire w is wound around the take-up drum 3 though it changes rapidly.
Since the roller is pressed by the pressing roller 21, the winding state on the winding drum 3 is not disturbed by this jump phenomenon.

Further, when the anchor is lowered under the braking action due to the rotational inertia of the speed reducer 6 or the motor 4, the electromagnetic brake 5 is energized only, so that the winding drum is pulled by the pulling force of the wire w. The rotational force of 3 is braked by the inertial resistance of the rotating portion of the speed reducer 6 and the motor 4, and the take-up drum 3 is rotated relatively slowly.
Since the wire 7 is also reciprocally displaced, the wire w is paid out regularly, and the anchor descends into the sea relatively slowly under the braking action of the rotational inertia.

In the above embodiment, the device for driving the winding drum 3, that is, the electromagnetic brake 5, the motor 4, the speed reducer 6 and the electromagnetic clutch 7 are provided inside the winding tubular portion 3a of the winding drum 3. This means that it is possible to prevent direct contact of seawater or other solid objects with these devices without the need for special enclosures, and to prevent corrosion and insulation resistance of the devices. And the damage due to impact are prevented, and the device is made compact by effectively utilizing the space.

Further, since the electromagnetic clutch 7 connects and disconnects via electric magnetic force, the structure is simplified and the manufacturing cost is reduced as compared with the one in which the connection is intermittently connected mechanically. In addition to being easy to operate, it operates quickly and smoothly.

The interlocking connection of the traverse shaft 9a and the winding drum 3 with the sprockets 11 and 12 and the chain 13 facilitates simplification of the structure and reduction of manufacturing cost as compared with the case of gear transmission.

[0031]

According to the present invention configured as described above,
In addition to being a winch that is convenient to use for lifting and lowering anchors of small ships, the following effects can be obtained, that is, the pressing roller acts to press the wire wound on the winding drum. Therefore, it is possible to wind the winding drum in a state where the wire or rope is tightened, and when the pulling wire is suddenly stopped when the wire wound on the winding drum is being rapidly pulled out. However, since the rotation of the winding drum around the specific axis is immediately stopped by the rotation resistance imparting action of the pressing roller, the wire wound around the winding drum is loosened and disturbed unnecessarily by the conventional rotation. The phenomenon can be reliably stopped, and when the wire drawing is suddenly stopped, the wire jumps violently. The it is the wire can be reliably prevented conventional phenomenon disturbed.

According to the second aspect of the invention, the action of the pressing roller can be obtained with a simple structure and reliably.

According to the third aspect of the invention, the action of the pressing roller can be more accurately and stably obtained by the aligning action of the wires by the traverse shaft and the line guide.

[Brief description of drawings]

FIG. 1 is a plan view of a winch according to the present invention.

FIG. 2 is a side view of the winch without winding the wire.

FIG. 3 is a side view of the winch in a state in which a wire is wound up.

[Explanation of symbols]

1 drum support 1a side support 1b side support 4 motor 5 Electromagnetic brake 6 reducer 7 Electromagnetic clutch 9 traverser 9a traverse shaft 13 chains 21 pressure roller 22 fulcrum axis 23 Arm member 24 shaft members s Winding outer peripheral surface w wire or rope x Specific axis

Claims (3)

[Claims] 1. A motor for mounting a take-up drum on a drum support rotatably around a specific axis and rotating the take-up drum inward of the take-up drum, and preventing the take-up drum from rotating. An electromagnetic brake for controlling the rotation of the motor, a speed reducer for decelerating the rotation of the motor and transmitting the rotation to the winding drum, and an electromagnetic clutch for connecting and disconnecting the output drum of the speed reducer and the winding drum. In a winch that is installed, and further formed with a traverser for aligning the wire or rope wound around the winding drum, the wire or rope wound around the winding outer peripheral surface of the winding drum. Is provided on the outer peripheral surface of the winding roller, and a pressing roller is provided for restricting free rotation of the winding drum by this pressing. Winch. 2. A drum supporting base is provided with a pair of side supporting portions for rotatably supporting the respective end portions of the winding drum, and each of these side supporting portions has a direction parallel to the specific axis. Corresponding ones of the pair of arm members are pivotally attached via a fulcrum shaft, and substantially match the width of the winding peripheral surface via the shaft members oriented parallel to the specific axis between the front ends of the arm members. The winch according to claim 1, further comprising a pressing roller having a predetermined length. 3. The winch according to claim 1, wherein the pressing roller is located between the winding outer peripheral surface and the traverse shaft of the traverser.