JP2023055230A - Sub-reel and winch - Google Patents

Abstract

To prevent an accident from occurring when a wire or the like breaks in a winch.SOLUTION: A sub-reel is used with a winch. The sub-reel has a drum around which a linear member or a strip member is wound. The sub-reel has a rotation driving part to apply a torque in a winding direction to the drum. The sub-reel has a locking part to suppress the drum rotation in a delivery direction and a switching part to switch between a lock state and a release state of the locking part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a subreel and winch assisting method.

Conventionally, winches have been used to lift heavy objects such as automobiles. For example, this winch is used when an automobile that has difficulty or cannot be driven by itself due to an accident or breakdown is pulled up onto a tow truck and loaded. It is also used to lift automobiles, heavy machinery, and ships that have been submerged or fallen from high places.

Such a winch is provided with a pull-out length detection unit for detecting the pull-out length of the belt and a brake unit for changing the pull-out performance of the belt from the drum. A technique for loosening the brake portion has been proposed (see Patent Document 1).

Japanese Patent Application Laid-Open No. 2021-138537

The quality of winch wires and ropes may deteriorate over time. For example, durability may be reduced by sunlight, snow, rain, water vapor, etc., or by abrasion. Such deterioration in durability may lead to cutting of wires, ropes, or the like.

If a rope or the like is cut while a heavy object is being lifted up by a winch, the heavy object moves in a direction generally opposite to the lifting direction. When a rope or the like is cut while the broken-down vehicle is being pulled up to the tow truck by the winch, the vehicle slides down in the direction opposite to the pulling-up direction. As a result, the automobile may hit some structure and be damaged. Furthermore, if a worker inspects or waits behind a heavy object such as an automobile that is being lifted up, there is a risk that the safety of the worker will be hindered. Furthermore, when the disabled vehicle is pulled up on the road, if the disabled vehicle slides down, there is a risk of contact with the following vehicle and movement to the opposite lane.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to prevent accidents when a wire or the like is cut off in a winch.

The subreel of the embodiment is used with a winch. A sub-reel has a drum around which a linear member or a band-shaped member is wound. The sub-reel also has a rotary drive section for applying a rotational force to the drum in the winding direction. Further, it has a lock portion for suppressing the rotation of the drum in the delivery direction, and a switching portion for switching between the locked state and the unlocked state of the lock portion.
The locking portion may rotate synchronously with the drum, and the locking portion may correspond to the center of rotation of the drum.
The locking portion in the sub-reel may have a shaft that engages with the drum and a gear portion provided on a portion of the shaft. Further, the switching portion may have a moving portion that moves in contact with and separate from the gear of the locking portion, and may be configured such that a state in which at least part of the moving portion contacts the gear is the locked state. . On the other hand, the released state is a state in which the moving portion is separated from the gear and does not come into contact with the gear.
The shaft of the locking portion is formed with a first concave portion extending in the longitudinal direction, and the inner peripheral surface of the drum is formed with a second concave portion formed so as to be paired with the first concave portion of the shaft. and an engaging portion inserted between the first recess of the drum and the second recess of the facing drum.
The drum is provided so as to sandwich a cylindrical portion around which the linear member or the belt-shaped member is wound, and one end and the other end of the cylindrical portion, and a first drum for storing the linear member or the belt-shaped member on the peripheral surface of the cylindrical portion. It may be configured to include a plate and a second plate. A first frame that holds the switching portion is fixed to the first plate.
The moving portion of the switching portion may be a pin capable of coming into contact with the gear of the locking portion by moving closer to the gear, and may include a first biasing member that biases the pin in a direction to approach the gear.
The switching section may have a grip for operating the pin to be released from the gear.
The switching section may include a release state holding section for holding the pin away from the gear.
A winding section having a second attached member for rotating the drum in a direction in which the linear member or the belt-shaped member is wound may be fixed to the second plate.
The locking portion may be configured to form a locked state by a centrifugal force generated by rotating the drum in a direction in which the linear member or the belt-shaped member is pulled out.

According to embodiments, it is possible to prevent accidents in the event of a disconnection at the winch.

1 is a schematic cross-sectional view showing a sub-reel of an embodiment; FIG. 1 is a schematic cross-sectional view showing a sub-reel of an embodiment; FIG. 1 is a schematic cross-sectional view showing a sub-reel of an embodiment; FIG. 1 is a schematic exploded perspective view showing a sub-reel of an embodiment; FIG. Schematic drawing and sectional drawing which show an embodiment drum member. Schematic which shows the gear and shaft of embodiment.

Sub-reels according to first to fifth embodiments will be described with reference to FIGS. 1 to 6. FIG.

[First embodiment]
The configuration of the sub-reel 1 according to the first embodiment will be described with reference to FIGS. 1 to 4. FIG. It should be noted that the sub-reel in FIG. 1 is an example, and other configurations are not excluded, and implementation in various forms is possible.

(drum)
As shown in FIGS. 1 to 6, the sub-reel 1 has a drum on which a linear member or band-shaped member W (hereinafter referred to as "band-shaped member W") is wound. The drum is constructed by combining a drum member D1 and a drum member D2. The drum member D1 is formed integrally with a disk-shaped first plate and a cylindrical member having a diameter smaller than that of the first plate (see FIG. 5). A through hole leading to the cylindrical member is provided in the center of the plate of the drum member D1. The drum member D2 is a plate (second plate) arranged to face the first plate of the drum member D1 so as to sandwich the cylindrical member.

(First frame/Second concave portion)
A first frame 110a is fixed to the plate portion of the drum member D1. The fixing position of the first frame 110a is generally opposite to the projection direction of the cylindrical member of the drum member D1. Further, the first frame 110a is provided with a through hole for passing a shaft 122, which will be described later. The through hole of the first frame 110a is formed at a position corresponding to the central position of the plate portion of the drum member D1. The through hole provided in the center of the drum member D1 has a generally cylindrical shape, and a groove portion is provided in a part of the inner peripheral surface of the through hole, which is formed on the outer edge side of the plate portion. It is This groove will be hereinafter referred to as the "second recess X2".

(Shaft, gear, first recess)
As shown in FIG. 4, the shaft 122 is passed through the through hole of the drum member D1. A gear 121 is provided on the shaft 122 at a position opposite to the drum member D1 side. The teeth of the gear 121 are oriented so as to prevent the belt-like member W from rotating in the drawing-out direction when transitioned to a locked state, which will be described later (see FIG. 4). The shaft 122 passes through the first frame 110a arranged outside (on the cover member C1 side) of the drum member D1. As shown in FIGS. 4 and 6, the shaft 122 is formed with a first concave portion X1 extending in the longitudinal direction. The first recess X1 is formed in substantially the same shape as the second recess X2.

(engagement part)
Between the first concave portion X1 and the second concave portion X2 that faces the first concave portion X1, an engaging portion (not shown) formed to fill the gap is arranged so as to be inserted. For example, when a rectangular parallelepiped space is formed by the first concave portion X1 and the second concave portion X2 facing thereto, the engaging portion is formed in a similar rectangular parallelepiped shape so as to fill the rectangular parallelepiped space. Rotational motion of the drum is thereby transmitted to the shaft 122 via the engaging portion. A gear 121 provided at one end of the shaft 122 is also rotated. That is, the shaft 122, the gear 121, the shaft 122, and the drum are integrally rotated.

(Second frame/winding unit)
A second frame 110b is fixed to the drum member D2, that is, the second plate. The fixed position of the second frame 110b is on the opposite side of the second plate to the first plate side. In other words, it is the projecting direction side of the cylindrical member of the drum member D1. A winding portion 123 is attached to the second frame 110b. That is, the second plate (drum member D2) and the winding portion 123 are configured to sandwich the second frame 110b.

The second frame 110b is also provided with a through hole through which the tip of the shaft 122 is passed. The through hole of the second frame 110b is formed at a position corresponding to the central position of the drum member D2 (second plate).

The winding unit 123 rotates the entire drum in a direction in which the belt-like member W is wound up. Details are as follows.
A through hole is provided on the center side of the winding portion 123 . The tip of the shaft 122 is passed through this through hole. Further, the distal end side of the shaft 122 is connected to the winding section 123 . The winding unit 123 has a second biasing member and a rotating body provided inside the case body (both not shown). This second biasing member is, for example, a spiral spring. In other words, the rotating body is urged by the second urging member in the direction in which the belt-shaped member or the like W is wound up.

Since the second biasing member biases the rotor in the winding direction, the shaft 122 connected to the rotor is also biased in the same direction. When the shaft 122 is urged to rotate in this direction, the drum is also urged in that direction through the engagement. Therefore, the sub-reel 1 is configured such that the belt-like member W is wound around the drum by the internal winding portion 123 .

As shown in FIGS. 1 and 2, the first frame 110a is provided with a switching portion for switching a lock portion including the gear 121 between a locked state and an unlocked state. The switching section includes a lock pin 126 , a guide holding section 125 that guides the sliding movement of the lock pin 126 and holds the lock pin 126 , and an operation section 124 for pulling up the lock pin 126 .

The guide holding portion 125 is attached to the first frame 110a. The guide holding portion 125 is provided with a through hole through which the lock pin 126 is passed. The movement direction of the lock pin 126 is restricted by passing through the through hole of the guide holding portion 125 . That is, the guide holding portion 125 guides the approaching movement to the gear 121 at the tip of the lock pin 126 . An operation portion 124 for pulling up the lock pin 126 is provided above the lock pin (upper side in FIG. 1).

When the lock pin 126 is in contact with the gear 121 as shown in FIG. 1, or in a state where it can contact with the teeth of the gear 121, the belt-like member W is prevented from rotating in the unrolling direction. In other words, even if the belt-like member W is to be drawn out, the lock pin 126 contacts the gear 121 and the lock pin 126 stops the rotation of the gear 121 . Since the gear 121 rotates integrally with the drum member D1 through the engagement portion described above, the drum does not rotate when the rotation of the gear 121 stops. Therefore, the position of the lock pin 126 restricts the extension of the belt-shaped member W. As shown in FIG. This state is the locked state of the sub reel 1 .

In the locked state, rotation in the unwinding direction (counterclockwise rotation in FIG. 6) is restricted, but rotation in the winding direction (clockwise rotation in FIG. 6) is allowed. This is because the tip side of the lock pin 126 slides on the slope of the teeth of the gear 121 .

On the other hand, when the user pulls up the operation portion 124 , the lock pin 126 does not come into contact with the gear 121 . This is the released state of the sub reel 1 .

As shown in FIG. 1 and the like, the guide holding portion 125 is provided with a window into which a screw or the like is inserted for fixing to the first frame 110a. The user can visually check whether the guide holding part 125 is securely fixed to the first frame 110a by looking at the window. This is because the reliable fixation of the guide holding portion 125 to the first frame 110a affects the certainty of the locked state.

A first biasing member (not shown) for attaching the lock pin 126 to the gear 121 side is provided inside the through hole of the guide holding portion 125 . The first biasing member is, for example, a coil spring. With this configuration, the locked state is established unless the user pulls up the lock pin 126 via the operation portion 124 and holds the state.

The cover C<b>1 may have a structure in which the locked state can be maintained even if the user does not touch the operation unit 124 . For example, when the operating portion 124 is rotated by a predetermined angle (90° or the like), the cover C1 may be engaged with any portion of the cover C1 to maintain the unlocked state (the state in which the lock pin 126 is pulled up).

(Band-shaped member, etc.)
A belt-like member W of the sub-reel 1 is wound around a drum, sandwiched between the first plate and the second plate and accommodated therebetween. Either a linear member such as a wire or a belt-shaped member such as a belt sling is used as the belt-shaped member W. When a belt-shaped member is used, random winding is prevented. Even if a linear member is used, if it is made of a material that can ensure flexibility and strength, even if it is kinked, it can be eliminated by rubbing it.

(Mounting part)
A mounting portion 127 for engaging the sub-reel 1 with a fixed structure, such as a loading platform of a tow truck, is provided on the side opposite to the opening through which the belt-like member W is paid out.

[effect]
This embodiment is a subreel used with a winch. According to this embodiment, a locked state is formed in which the lock pin 126 and the gear 121 are in contact with each other. In the locked state, the rotation of the drum that rotates together with the gear 121 is restrained. That is, the sub-reel 1 is configured such that when the belt-like member W is wound up or unwound, the gear 121 and the shaft 122 are also rotated in accordance with the rotation of the drum. In this state, when the gear 121 and the moving portion (for example, lock pin) of the switching portion cooperate with each other to shift to the locked state, the rotation of the drum in the direction in which the belt-shaped member or the like W is delivered is restrained.

By attaching the belt-like member W of the sub-reel 1 to the object to be hoisted in the same manner as the winch wire or the like, it is possible to prevent accidents when the wire or the like is cut off in the winch.

Further, the reason why the cylindrical member and the first plate are integrated in the drum member D1 is that a larger load is applied to this side compared to the drum member D2. That is, since the drum member D1 side is the side on which the gear 121 is provided, when the drum rotates in the direction in which the belt-shaped member W is drawn out in the locked state, a load is applied to the drum member D1 side. In the case of a structure in which two plates are sandwiched at both ends of the cylindrical member of the drum and fixed with screws, etc., stress concentrates on the contact points between the gear-side plate and the screws, which may cause deformation or damage to the contact points. be. In the present embodiment, since the cylindrical member and the first plate are integrated in the drum member D1, it is possible to eliminate this possibility.

[Second embodiment]
A sub-reel according to the second embodiment will be described. The sub-reel of the second embodiment has projections for fixing the operating portion 124 in the raised state on the reciprocating path of the lock pin 126 on the cover C1. A pair of protrusions are provided along the direction in which the first plate and the second plate of the drum member D1 face each other. The user can pull up the operation part 124, rotate it around the axis of the lock pin 126, and hook it on this protrusion. Accordingly, the released state can be maintained even if the user does not hold the operation unit 124 while pulling it up.

(Modification)
In the first embodiment, the lock pin 126 that slides and the shaft 122 and gear 121 that rotate integrally with the drum are configured to be in the locked state. However, other forms are possible. For example, the drum rotates as the belt-like member W is fed out, and it is also possible to employ a configuration in which the drum is shifted to the locked state by utilizing the centrifugal force generated by the rotation. The state in which the lock portion is biased toward the center by the spring is the locked state, whereas the lock portion is moved away from the center against the bias by the centrifugal force due to the rotation of the drum, and is in a position away from the center. It is the structure which engages with a to-be-engaged part and forms a locked state. However, in this configuration, the centrifugal force does not create a locked state unless the belt-like member W is fed out at a predetermined speed or higher. is restricted.

Also, in the first embodiment, the lock pin 126 that slides is used. However, the movement trajectory of the locking member is not limited to this, and may not be linear, and may be curved.

Also, the above embodiment was an independent sub-reel. However, the sub-reel and the winch may be constructed integrally. In this case, the drum around which the linear or belt-shaped member is wound is divided into a first drum area and a second drum area via a partition. The first drum area is wound with a wire-shaped member or strip-shaped member for pulling up. The second drum area is wound with a linear member or strip member for preventing dropping. The winch is provided with a rotary drive section for applying a rotational force to the drum in the winding direction, and a lock section for suppressing rotation of the drum in the unwinding direction. The lock state is the same as above.

While embodiments of the invention have been described, the above embodiments are provided by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

1 Sub reel 110a First frame 110b Second frame 121 Gear 122 Shaft 123 Winding part 124 Operating part 125 Guide holding part 126 Lock pin 127 Mounting part D1 Drum member D2 Drum member W Belt member etc.

Claims (10)

A sub reel used with a winch,
a drum around which the linear member or the belt-shaped member is wound;
a rotary drive unit for applying a rotational force in a winding direction to the drum;
a locking portion that suppresses rotation of the drum in the delivery direction;
a switching unit for switching between a locked state and an unlocked state of the lock unit;
A subreel with a The locking part rotates in synchronization with the drum,
2. The sub-reel according to claim 1, wherein the lock portion and the center of rotation of the drum correspond to each other. the lock portion has a shaft that engages with the drum and a gear provided on a portion of the shaft;
The switching unit has a moving unit that can move toward and away from the gear, and transitions to a locked state when at least part of the moving unit abuts the gear,
3. The sub-reel according to claim 1 or 2, wherein the moving portion is released from the gear and is in a released state when it is out of contact with the gear. the shaft is formed with a longitudinally extending first recess;
A second recess formed to be a pair with the first recess is formed on the inner peripheral surface of the drum,
4. The sub-reel according to claim 3, further comprising an engaging portion inserted between the first recess of the shaft and the second recess of the facing drum. The drum
a cylindrical portion around which the linear member or the belt-shaped member is wound;
The first plate includes a first plate and a second plate which are provided so as to sandwich one end and the other end of the cylindrical portion and accommodate the linear member or the belt-shaped member on the peripheral surface of the cylindrical portion. The sub reel according to any one of claims 1 to 4, wherein a first frame holding the switching portion is fixed to the plate. the moving part of the switching part is a pin capable of coming into contact with the gear by moving closer to the gear;
5. The sub-reel according to claim 3, further comprising a first biasing member that biases the pin in a direction to approach the gear. 7. The sub-reel according to claim 6, wherein the switching portion includes a released state holding portion for holding the pin in a state of being separated from the gear. 6. The sub-reel according to claim 5, wherein the second plate is provided with a second attaching member for rotating the drum in a direction in which the linear member or the belt-like member is wound. 2. The sub-reel according to claim 1, wherein the locking portion forms a locked state by centrifugal force generated by rotating the drum in a direction in which the linear member or the belt-shaped member is pulled out. a drum around which a linear or strip-shaped member is wound;
a rotary drive unit for applying a rotational force in a winding direction to the drum;
a locking part that suppresses rotation of the drum in the delivery direction,
The drum portion includes a first drum region around which a linear member or belt-shaped member for lifting is wound,
and a second drum region around which the fall-prevention linear or strip member is wound.

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