JP7179312B2 - winch device - Google Patents

Description

The present invention relates to a winch device.

2. Description of the Related Art Conventionally, winch devices have been used to unload and unload construction materials and the like at construction sites and the like.

A winch device consists of a driving motor, a wire drum for winding or unwinding a wire tied to a load, and a power transmission mechanism between the motor and the wire drum. The drive shaft of the motor meshes with a gear for power transmission, and the rotation of the gear is transmitted to the wire drum through the wire drum drive shaft.

In such winch devices, various measures have been taken so that they can be used safely under various load conditions during loading and unloading.

Brake pads are provided on both sides of the winch gear. As one specific configuration example, there is a portion that has an elastic mechanism to hold the gear (referred to as a “gear holding portion”), and the elastic mechanism presses the brake pad against the gear.

The distance between the gear holders is extendable. When the distance between the gear holding parts is extended, part of the extended gear holding part is pressed against the ratchet plate, and a ratchet mechanism that allows rotation only in a predetermined direction works.

Conversely, when the distance between the gear holding parts is shortened, part of the gear holding part pressed against the ratchet plate starts to slide, and the gear can rotate in the opposite direction without the ratchet mechanism working. It has become.

When the winch device is used for unloading, the distance between the gear holders is increased and a portion of the gear holders is pressed against the ratchet plate of the ratchet mechanism. As a result, the gear rotates together with the ratchet plate and rotates in the direction permitted by the ratchet mechanism. In this state, the rotation (positive rotation) of the motor is transmitted to the gear and wire drum to lift the load. If the gear is about to rotate in the opposite direction during unloading, the ratchet mechanism works to prevent the gear from rotating in the opposite direction.

When unloading, the distance between the gear holders shrinks, and as a result, part of the gear holder pressed against the ratchet plate begins to slide against the ratchet plate, causing the ratchet mechanism to stop working and the gear to rotate the motor. It will be able to rotate in the same reverse direction as (reverse rotation).

As an example of the means for enabling the extension and contraction of the gear holding portion, a pair of cams whose inclined surfaces are fitted to each other can be used.

According to such a cam, when unloading a cargo, the inclined surface of the cam slides to extend the distance between the cams, and as a result, the distance between the gear holding portions is extended, and the member of the gear holding portion that contacts the ratchet mechanism becomes the ratchet. It presses against the plate and the frictional force causes the ratchet plate to rotate with the gear. As a result, it becomes possible to rotate in one direction while allowing the ratchet mechanism to function.

On the other hand, when unloading with the winch device, the slanted surfaces of the cams slide into each other and the distance between the gear holders is reduced. As a result, the member of the gear holding portion that abuts against the ratchet mechanism slides against the ratchet plate, and the ratchet mechanism does not function so that the load can be unloaded.

JP-A-11-35289 JP-A-11-43291 JP-A-5-43194 JP 2009-107833 A JP 2018-76163 A

As mentioned above, when the winch device is used for unloading, the distance between the gear holding parts is extended, part of the gear holding part is strongly pressed against the ratchet plate, and the gear moves along with the ratchet plate in the direction of rotation of the motor (positive). rotation).

If a load that stops the rotation of the motor is applied while the load is being unloaded, the motor may seize if the current continues to be supplied to the motor. Therefore, when the winch device is unloaded, a means is taken to keep the motor rotating when a constant load larger than the specified load is applied.

Specifically, when a certain heavy load is applied when the winch device is unloaded, slippage occurs between the gear and the brake pads provided on both sides of the gear.

These brake pads do not slip between the gears during normal driving, but when a constant load larger than the specified load is applied, the brake pads are pressed against the gears by an elastic mechanism so that they slip. has been adjusted.

The winch device is shipped from the factory after being adjusted so that the elastic mechanism presses the brake pad against the gear with an appropriate force.

However, brake pads may wear out with use. The elastic mechanism often uses a spring with a relatively large elastic modulus so that it can press the brake pad with a relatively large force so as not to slip during normal use, and so that it can be made compact.

When the stroke of the spring changes due to wear of the brake pad, the spring of the elastic mechanism having a large elastic modulus changes the stroke, and the pressing force against the brake pad may decrease beyond the allowable range. In other words, the conventional technology has a narrow tolerance for brake pad wear.

Therefore, it is necessary to periodically adjust the winch device, and if the wear of the brake pads exceeds the allowable range, extensive maintenance such as replacement of the brake pads may be required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a winch device that is maintenance-free for a long period of time with a simple structure.

The winch device according to the invention is for example:
a motor, a gear driven by the motor, a gear holding section including a gear holding means for holding the gear through an elastic mechanism, a ratchet mechanism connectable to the gear holding section, and a gear holding section. and a wire drum drive shaft driven by the gear, and a wire drum driven by the wire drum drive shaft,
The gear clamping means has brake pads arranged on both sides of the gear, a brake disc and a plate clamping the brake pads from both sides, and a holding plate holding a predetermined distance from the gear,
The elastic mechanism includes a presser plate whose distance from the holding plate is adjustable, and a coil spring having one end in contact with the presser plate and the other end in contact with the plate.

The brake disc is
a disk portion that abuts one of the brake pads from the outside thereof, and a disk portion that extends from the disk portion, penetrates the central opening of the gear, and protrudes to the outside of the brake pad, the plate, and the retaining plate on the opposite side. and a through-axis to
The through shaft of the brake disc may have a stop for retaining the position of the retainer plate.

The elastic mechanism is
a screw for adjusting the distance between the holding plate and the holding plate;
A spacer may be provided between the pressing plate and the holding plate to define an initial load of the spring.

ADVANTAGE OF THE INVENTION According to this invention, the simple structure provides the winch apparatus maintenance-free for a long period of time.

1 is a perspective view of a winch device according to an embodiment of the invention; FIG. 1 is an exploded perspective view of a winch device according to one embodiment of the present invention; FIG. 1 is an exploded perspective view of a power transmission section according to one embodiment of the present invention; FIG. 1 is an exploded perspective view of a gear periphery according to an embodiment of the present invention; FIG. FIG. 4 is an explanatory diagram of gear clamping means, an elastic mechanism, and action according to an embodiment of the present invention; 1 is a perspective view of a nail plate according to one embodiment of the invention; FIG. 1 is a perspective view of a brake disc and ring according to one embodiment of the invention; FIG. FIG. 5 is an explanatory diagram of the action of the cams of the brake disc and ring; FIG. 5 is an explanatory diagram of means for releasing the fixed state of the holding member according to the embodiment of the present invention;

An embodiment for carrying out the present invention will be described below.

FIG. 1 shows a perspective view of a winch device 1 according to one embodiment of the invention.

The winch device 1 has a motor section 2 as a drive source, a wire drum 3 for winding a wire for lifting or suspending a load, and a power transmission section 4 for transmitting the power of the motor section 2 to the wire drum 3. .

The power transmission unit 4 has a case 4a and a case cover 4b, and the power transmission mechanism is housed therein.

The winch device 1 has side plates 10a and 10b, which support the entire device and are used to fix the winch device 1 to a pedestal or the like.

FIG. 2 shows an exploded perspective view of the winch device 1. As shown in FIG. FIG. 3 shows an exploded perspective view in which the power transmission portion 4 is enlarged. FIG. 4 is an enlarged exploded perspective view showing the periphery of the gear (gear holding portion) of the power transmission portion 4. As shown in FIG. The configuration of the winch device 1 of this embodiment will be described below with reference to these drawings.

As shown in FIG. 2, the motor section 2 has a motor cover 2a and a fan case 2b, in which a fan 2c and a motor 2d are housed. A fan 2c is provided to rotate and exhaust the heat of the motor 2d.

The outer shaft 5 is inserted through the core of the wire drum 3 , and the drive shaft 6 of the drive shaft of the motor 2 d passes through the outer shaft 5 .

Reference numeral 20 in FIG. 2 indicates wires (two types with different lengths) wound around the wire drum 3 .

The end of the drive shaft 6 has a drive shaft gear 6 a which is inserted into the case 4 a and meshes with the gear 7 of the power transmission section 4 .

As shown more clearly in FIGS. 2 and 3, the gear 7 includes a gear retainer 19 (i.e. brake disc 13, two brake pads 14, plate 15, pawl plate 33, retainer plate 16, resilient mechanism 17 and torsion). It is constructed such that power can be transmitted to the wire drum drive shaft 8 via the spring 24 and the ring 25).

The elastic mechanism 17 includes a pressing plate 21 whose distance from the holding plate 16 can be adjusted, and at least one (example in the figure) having one end in contact with the pressing plate 21 and the other end in contact with the plate 15 that presses the brake pad 14 . 5) coil springs 22 and screws 26 and spacers 27 which will be described later.

A wire drum drive gear 8a is provided at the end of the wire drum drive shaft 8 and meshes with the wire drum gear 9 shown in FIG.

A wire drum gear 9 is fixed to the wire drum 3 by a screw so as to transmit the rotation to the wire drum 3. - 特許庁

From the viewpoint of the power transmission path, the rotation of the motor 2d is transmitted through the drive shaft 6 to the gear 7, and the rotation of the gear 7 is transmitted through the gear holding portion 19 to the wire drum drive shaft 8, thereby driving the wire drum. The rotation of the shaft 8 is transmitted to the wire drum 3 via the wire drum gear 9.

FIG. 4 shows the configuration of the gear 7 and releasing means for releasing the fixed state between the gear holding portion 19 and the cam.

The gear holding portion 19 consists of, from the left side of FIG. It has a tool 23 , a torsion spring 24 and a ring 25 .

Among them, the pressing plate 21 , the coil spring 22 , the screw 26 and the spacer 27 constitute the elastic mechanism 17 . Brake pads 14 are arranged on both sides of gear 7 .

The torsion spring 24 has one end hooked in a groove (or hole) provided near the cam 13d of the brake disc 13, and the other end inserted in a pin hole provided on the outer circumference of the ring 25. It is hooked on the pin 25a.

The gear holding portion 19 has gear clamping means 18 for clamping the gear 7 via the elastic mechanism 17 .

The gear clamping means 18 has an elastic mechanism 17 and a structure for holding a fixed distance for the elastic mechanism 17 to function.

For this reason, the brake disc 13 has a disc portion 13a that abuts one of the brake pads 14 (the left brake pad 14 in the example of FIG. 4) from the outside thereof, and an opening in the central portion of the gear 7 that extends from the disc portion 13a. It has a through shaft 13b that penetrates through 7a and protrudes to the outside of the brake pad 14, the plate 15, the pawl plate 33, and the holding plate 16 on the opposite side. A groove is formed in the projecting end of the penetrating shaft 13b, and a stopper 23 is fitted in the groove. As a result, the holding plate 16 is stopped by the stopper 23 and can be held at a predetermined distance from the gear 7 .

The holding plate 21 is adjustable in distance from the holding plate 16 . Specifically, a plurality of screws 26 pass through the retainer plate 21 and are screwed into the retainer plate 16 . A spacer 27 is fitted to the threaded portion of the screw 26 between the holding plate 16 and the pressing plate 21 . The pressing plate 21 is in contact with one end of the coil spring 22 . The coil spring 22 passes through the holding plate 16 , further passes through the pawl plate 33 , and has the other end in contact with the plate 15 . As shown in FIGS. 4 and 5, both the holding plate 16 and the pressing plate 21 have a diameter smaller than that of the gear 7 .

The pressing plate 21, the coil spring 22, the screw 26, and the spacer 27 constitute an elastic mechanism 17, and the action of the elastic mechanism 17 enables the gear 7 to be elastically clamped. Note that the spacer 27 is an additional component that can be added to the elastic mechanism 17 as necessary. Moreover, the spacer 27 is not limited to the configuration in which it is fitted to the threaded portion of the screw 26 . For example, the spacer 27 may be formed integrally with the pressing plate 21 so as to surround the through hole of the pressing plate 21 through which the screw 26 passes, or at a position outside the through hole. Conversely, it may be integrally formed on the holding plate 16 side. By doing so, the number of parts of the elastic mechanism 17 can be reduced, and the manufacturing process can be simplified.

Here, with reference to FIG. 5, it will be explained that the gear holding means 18 can hold the gear 7 with an appropriate force via the elastic mechanism 17. FIG.

5A and 5B are diagrams for explaining the action of the gear clamping means 18 and the elastic mechanism 17. FIG. In FIG. 5, only one coil spring 22, one screw 26 and one spacer 27 are shown for simplicity, but there are five of each in the example of FIGS. are staggered in the

Brake pads 14 are arranged on both sides of the gear 7. One brake pad 14 is sandwiched between the disk portion 13a of the brake disk 13 from the outside, and the other brake pad 14 is sandwiched by the plate 15 from the opposite side. The penetrating shaft 13b of the brake disc 13 passes through the central hole 7a of the gear 7 and protrudes outside the brake pad 14, the plate 15, the pawl plate 33 and the holding plate 16 on the opposite side. A groove is formed in the tip of the penetrating shaft 13b, and a stopper 23 is fitted therein. A maximum distance between the holding plate 16 and the gear 7 is defined by the stopper 23 .

A screw 26 allows the distance between the holding plate 21 and the holding plate 16 to be adjusted. The coil spring 22 has one end in contact with the pressing plate 21 and the other end in contact with the plate 15 . With this structure, when the screw 26 is tightened, the holding plate 16 is kept at a distance from the gear 7, so the coil spring 22 presses the plate 15 strongly. As a result, the brake pads 14 are strongly pressed against the gear 7 from both sides.

The brake pad 14 and the gear 7 rotate integrally without slipping under normal operating torque (for example, less than 150% of the specified load) of the winch device 1 . Thus, coil spring 22 presses plate 15 with a pressure of 220-280 kilograms, more preferably 240-260 kilograms. Needless to say, this pressure can be appropriately adjusted according to the specified load of the winch device 1 .

Spacer 27 defines the distance between holding plate 16 and pressing plate 21 when screw 26 is tightened. By arranging the spacer 27, the screw 26 can press the plate 15 with a constant pressure (initial load) at the time of shipment from the factory. As a result, the pressing force of the brake pads of the winch device 1 can be made uniform, and variations in products can be prevented.

The coil spring 22 has a modulus of elasticity necessary to generate the braking force of the brake pad 14 . Furthermore, the coil spring 22 can be selected to generate the necessary pressing force even if the stroke changes due to wear of the brake pad 14 . That is, by appropriately selecting the spring constant, it is set so as to generate an appropriate pressing force at the time of shipment from the factory, and by anticipating the wear of the brake pad 14 in design, the maintenance cycle of the brake of the gear 7 is greatly extended. be able to.

When the distance between the gear holding portions 19 is shortened, the above braking force is generated, and the brake disc 13 twists with respect to the ring 25 during unloading.

FIG. 6 shows the nail plate 33 on an enlarged scale.

As shown in FIG. 6, the claw plate 33 is made of a roughly brim-shaped metal plate, and has a pair of claws 33a having a notch in the peripheral edge portion, and a part of the metal folded back to form an inclined surface as shown in the figure. 33b are formed. A plurality of holes 33c are formed in the vicinity of the central opening of the claw plate 33 as shown. Holes 33c are used to secure nail plate 33 to adjacent plate 15 by means of truss screws 36, as shown in FIG.

FIG. 7 shows the brake disc 13 and the ring 25 extracted.

As shown in FIG. 7, the brake disc 13 has a cam 13d and the ring 25 has a cam 25d. The cam 13d and the cam 25d each have an inclined surface as shown, and are formed so that the inclined surfaces are fitted to each other during assembly. The brake disc 13 and the ring 25 are members at both ends of the gear holding portion 19 .

The ring 25 is fitted to the wire drum drive shaft 8 (not shown) and fixed to rotate integrally with the wire drum drive shaft 8 by a key groove 25b.

8A and 8B are diagrams for explaining the interaction between the brake disc 13 and the ring 25. FIG.

As shown in FIG. 8, the brake disc 13 and the ring 25 are arranged so that the cams 13d and 25d face each other, and are arranged so that the inclined surfaces of the cams 13d and 25d are fitted to each other during assembly.

Taking the time of unloading as an example, the gear 7 rotates in the unloading direction (clockwise direction) shown on the right side of FIG. A twist of direction is produced. In the specification of the present application, the relative twist direction of the brake disc 13 with respect to the ring 25 during unloading is referred to as "positive twist direction".

When the brake disc 13 rotates relative to the ring 25 in the positive torsion direction, the inclined surfaces of the cams 13d and 25d slide against each other, increasing (extending) the distance between the brake disc 13 and the ring 25. .

As the distance between brake disc 13 and ring 25 increases, brake disc 13 presses against ratchet plate 12, which is part of the ratchet mechanism, as shown in FIG. A pawl 28 is attached to the inner side of the case cover 4b so as to be able to swing about an axis and to be biased inward by a spring. A gear with inclined teeth is provided on the outer periphery of the ratchet plate 12, and together with the pawl 28, forms a ratchet mechanism. A plate surface of the ratchet plate 12 is provided with a friction material that increases frictional force. Ratchet plate 12 is sandwiched between end plate 11 and brake disc 13 .

As a result, the ratchet plate 12 pressed by the brake disc 13 rotates together with the gear 7 during lifting, and when the gear 7 tries to reverse, the ratchet mechanism acts to prevent the reverse rotation of the gear 7.例文帳に追加

During unloading, the gear 7 rotates in the counterclockwise direction for unloading.

When the gear 7 is reversed during unloading, the cams 13d and 25d of the brake disc 13 and the ring 25 are engaged with each other as before, the distance between the brake disc 13 and the ring 25 is reduced, and the brake disc 13 and the ratchet are engaged. The pressure on plate 12 subsides. Therefore, when unloading, the brake disc 13 can be reversed while sliding on the ratchet plate 12, so that the gear 7 can be reversed.

The operation of the winch device 1 based on the above configuration will be described below.

First, the time of unloading will be explained.

During unloading, the rotation of the motor 2d is transmitted to the gear 7 via the drive shaft 6. The gear 7 is sandwiched between the two brake pads 14 and tries to rotate together with the brake disc 13 as described above, causing the ring 25 to twist in the positive direction. As a result, the brake disc 13 and the cams 13d and 25d of the ring 25 mesh with each other while acting in a direction in which the inclined surfaces slide away from each other.

Since the cams 13 d and 25 d move away from each other, pressure is applied to the brake disc 13 against the ratchet plate 12 , and the ratchet plate 12 tries to rotate together with the brake disc 13 . Since the ratchet pawl 28 is in the releasing direction, the ratchet plate 12 is rotatable in the unloading direction. Therefore, the brake disc 13 rotates in the positive direction and the ring 25 rotates accordingly.

Since the ring 25 is fixed to the wire drum drive shaft 8 by the key groove 25b, when the ring 25 rotates, the wire drum drive shaft 8 also rotates, and the rotation of the gear 7 is transmitted to the wire drum 3. You can lift the load.

On the other hand, reverse rotation of the ratchet plate 12 is restricted by the ratchet mechanism, so that reverse rotation of the gear 7 can be prevented in the unlikely event of pulling up.

Next, unloading will be described.

When unloading, the motor 2d rotates in the direction opposite to that during unloading, and this rotation is transmitted to the gear 7, which tries to rotate in the direction opposite to that during unloading (unloading direction).

The rotation of the gear 7 in the unloading direction causes the brake disc 13 to twist in the direction opposite to the positive twist direction with respect to the ring 25, whereby the inclined surfaces of the cams 13d and 25d are engaged with each other, and the brake disc 13 and the ring 25 are engaged. get close to each other.

As a result, the pressing force of the brake disc 13 against the ratchet plate 12 is weakened, so that the brake disc 13 can slide and rotate with respect to the ratchet plate 12, enabling unloading.

In this way, when unloading, the motor 2d rotates in the direction opposite to that when unloading, and accordingly the gear 7 rotates. can be lowered. Further, the brake disk 13 slides while rubbing against the friction material of the ratchet plate 12, so that the brake can be effectively applied, and the motor 2d is not overloaded.

Next, a case where an excessive load is suddenly applied and the gear holding portion 19 is stuck will be described.

As described above, when the load unexpectedly increases to a certain extent (within the expected range) during unloading (for example, when it reaches 150% or more of the specified load), the gear 7 and the brake pad 14 slip, causing the motor 2d to seize. It is designed to prevent

However, when an excessive load is suddenly applied, the cams 13d and 25d are separated excessively, and the distance between the brake disc 13 having the cams 13d and 25d and the ring 25 increases, and as a result the brake disc 13 becomes a ratchet. It presses hard against the plate 12 and the action and reaction of forces can cause the brake disc 13 to become stuck.

Even when the brake disk 13 is fixed, the rotation of the motor 2d in the unloading direction is maintained and seizure of the motor is prevented. When the disk 13 is fixed, the gear 7 will idle and will not return to its original state.

FIG. 9 shows the action of the releasing means of this embodiment.

The releasing means of this embodiment has first engaging means that rotates together with the gear 7 and second engaging means that rotates together with the brake disc 13 .

The first engaging means engages the second engaging means of the brake disc 13 when the gear 7 rotates in the unloading direction, and rotates the brake disc 13 relative to the ring 25 in the positive unloading torsion. Rotate in the opposite direction.

In this embodiment, the spring pin 34 is the first engaging means, and the claws 33a and 33b of the claw plate 33 are the second engaging means.

The spring pin 34 is inserted into a pin hole 35 provided in the gear 7, rotates together with the gear 7, protrudes toward the pawl plate 33, and rotates in the unloading direction indicated by the arrow in FIG. , 33b.

The pawls 33a and 33b have inclined surfaces, and when the gear 7 rotates in the unloading direction, the tips of the spring pins 34 ride over the inclined surfaces. It is adapted to engage with pin 34 . That is, when the gear 7 rotates in the unloading direction, the spring pin 34 rotates the pawl plate 33 within half a turn.

The pawl plate 33 rotates integrally with the plate 15 by means of a truss screw 36. The plate 15 has a key on its inner peripheral surface that fits into the key groove of the cam 13d, so that the plate 15 is integral with the brake disc 13. It is supposed to rotate.

With the above structure, when the gear 7 rotates in the unloading direction indicated by the arrow in FIG. 9, the spring pin 34 engages with the pawls 33a and 33b within half a rotation to force the brake disc 13 to rotate.

The rotation of the brake disc 13 in the unloading direction causes a torsion in the direction opposite to the positive torsion direction with respect to the ring 25, returning the cams 13d and 25d to the state in which the inclined surfaces are fitted to each other. After that, normal loading and unloading operations can be performed.

Based on the above description, those skilled in the art may conceive additional effects and various modifications of the present invention, but aspects of the present invention are not limited to the above-described embodiments. Various additions, changes, and partial deletions are possible without departing from the conceptual idea and spirit of the present invention derived from the content defined in the claims and equivalents thereof.

1: winch device 2: motor section 2a: motor cover 2b: fan case 2c: fan 2d: motor 3: wire drum 4: power transmission section 4a: case 4b: case cover 5: outer shaft 6: drive shaft 6a: drive shaft Gear 7: Gear 7a: Central hole 8: Wire drum drive shaft 8a: Wire drum drive gear 9: Wire drum gears 10a, 10b: Side plate 11: End plate 12: Ratchet plate 13: Brake disc 13a: Disc portion 13b : Through shaft 14: Brake pad 15: Plate 16: Holding plate 17: Elastic mechanism 18: Gear holding means 19: Gear holding part 20: Wire 21: Pressing plate 22: Coil spring 23: Stopper 24: Torsion spring 25: Ring 25a : Spring pin 25b: Key groove 25d: Cam 26: Screw 27: Spacer 28: Pawl 33: Claw plates 33a, 33b: Claw 33c: Hole 34: Spring pin 35: Pin hole 36: Truss screw

Claims (3)

a motor, a gear driven by the motor, a gear holding section including a gear holding means for holding the gear through an elastic mechanism, a ratchet mechanism connectable to the gear holding section, and a gear holding section. and a wire drum drive shaft driven by the gear, and a wire drum driven by the wire drum drive shaft,
The gear holding portion has a pair of cams having inclined surfaces to be fitted to each other, and when the gear rotates in the unloading direction, the cams are relatively twisted in the positive direction to extend the gear holding portion to extend the ratchet mechanism. , the gear, the elastic mechanism, the gear clamping means and the ratchet mechanism rotate integrally, and while the ratchet mechanism is operating, the rotation of the motor is driven through the wire drum drive shaft to the wire A winch device for transmitting to a drum,
The gear clamping means is
brake pads positioned on either side of the gear;
a brake disc having one of the cams and a plate sandwiching the brake pad from both sides;
a holding plate that holds a predetermined distance from the gear,
The elastic mechanism is
a holding plate whose distance from the holding plate can be adjusted;
a coil spring having one end in contact with the holding plate and the other end in contact with the plate and inserted into the through hole of the holding plate . A winch device according to claim 1,
The brake disc is
a disk portion that abuts one of the brake pads from the outside thereof, and a disk portion that extends from the disk portion, penetrates the central opening of the gear, and protrudes to the outside of the brake pad, the plate, and the retaining plate on the opposite side. and a through-axis to
A winch device, wherein the through shaft of the brake disc has a stop for retaining the position of the retaining plate. The winch device according to claim 1 or 2,
The elastic mechanism is
a screw for adjusting the distance between the holding plate and the holding plate;
a spacer disposed between the pressing plate and the holding plate and defining an initial load of the spring ;
A diameter of the pressing plate and the holding plate is smaller than a diameter of the gear, and the screws and the coil springs are provided alternately in a circumferential direction around the wire drum drive shaft.
winch device.

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