JPH0826677A - Winch device - Google Patents

Abstract

PURPOSE:To provide a lightweight and compact winch device by reducing the number of rotary driving shafts in a type having easy rope mounting and demounting. CONSTITUTION:Two rotary driving shafts 16 connected to a rotary driving source are protruded from a machine causing 1a. A winding drum 19 having a large-diameter part and a small-diameter part, and an idler 27 having a large- diameter part, a small-diameter part, and a recessed part 27c are fixed to each shaft 16. A rotatable guide roller 55 and a presser roller 44 energized to the idler recessed part side and connected to the idler 27 for rotation are interposed at around the idler recessed part 27c. A rope R is wound several times on the small-diameter part from the large-diameter part of the winding drum 19 and is wound several times on the small-diameter from the large-diameter part of the idler 27 and is then wound on a guide roller 55, and is finally wound on the idler recessed part 27c to be released from between the recessed part 27c and the presser roller 44.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capstan type winch device, and more particularly to a capstan type winch device in which a winding drum and the like is held in a cantilever shape so that a rope can be easily attached and detached. The present invention relates to a winch device that is lightweight and compact by reducing the number of rotary drive shafts.

[0002]

2. Description of the Related Art Conventionally, as a capstan type winch device, one described in Japanese Patent Publication No. 63-53118 is known.

In the winch device described in the above publication, two types of capstans (a take-up drum and an idler) are provided on two rotary drive shafts protruding from the machine frame, and further, a take-up drum and an idler are provided. In order to increase the frictional force with the rope and improve the traction force of the rope, a pair of winding rollers are provided in the machine frame so that the rope can be pinched and fed.

Of these two winding rollers, one winding roller is fixed to a rotary drive shaft protruding from the machine frame,
The other winding feed roller is arranged so as to interlock with one winding feed roller with a gear mechanism interposed.

The winding drum and the idler had a large diameter portion and a small diameter portion arranged in parallel in the axial direction, respectively.

The rope is wound around the winding drum from the large diameter portion to the small diameter portion several times, and then the rope extending from the winding drum small diameter portion is wound several times from the idler large diameter portion to the small diameter portion. The rope that was hung and further extended from the small diameter portion of the idler was discharged after passing between the pair of winding rollers.

In the winch device of the above publication, the take-up drum, the idler, and the rotary drive shafts of one of the winding feed rollers are connected to a predetermined rotary drive source, and the rotary drive source rotates to wind the winder. The take-up drum, the idler, and one winding feed roller were rotationally driven to pull the rope.

[0008]

However, in the winch device described in the above publication, the rotary drive shaft connected to the rotary drive source corresponds to the take-up drum, the idler, and one of the take-up rollers. There was a book.

These rotary drive shafts are supported like a cantilever on the machine frame so that the rope can be easily attached and detached.

Therefore, the mechanism for holding these rotary drive shafts needs to be strong, and it is necessary to dispose sprockets and gears for connecting to the rotary drive source, which increases the weight of the winch device. Also, the winch device was supposed to be bulky.

The present invention solves the above-mentioned problems, and provides a winch device of a capstan type in which the rope can be easily attached and detached, in which the number of rotary drive shafts is reduced to make the winch device lightweight and compact. The purpose is to do.

[0012]

In the winch device according to the present invention, two rotary drive shafts connected to a rotary drive source are projected from the machine frame, and one of the rotary drive shafts has a large diameter at the tip thereof. And a small-diameter portion are arranged side by side in the axial direction, and a winding drum is fixed to the other end of the rotary drive shaft. An idler having parts arranged side by side is fixed, and a rotatable guide roller is urged around the concave portion of the idler and is urged toward the concave portion of the idler to interlock with the idler via an interlocking mechanism. And a pressing roller that rotates, are arranged with their respective axial directions parallel to the axial direction of the idler, and the rope is
The rope is wound around the winding drum from the large diameter portion to the small diameter portion several times, and then the rope extending from the small diameter portion of the winding drum is wound several times from the large diameter portion to the small diameter portion of the idler. The rope extending from the small-diameter portion is wound around the guide roller, then wound around the concave portion of the idler, and discharged through the space between the concave portion and the pressing roller.

[0013]

In the winch device according to the present invention, when the winding drum and the idler are rotated by the rotational drive of the rotary drive shaft, their outer peripheral surfaces are
Since the rope is held between the presser roller and the idler concave part by exerting frictional force, the frictional force on the outer peripheral surface between the large diameter part and the small diameter part of the winding drum and the idler increases. Therefore, the rope will be pulled strongly.

In the winch device according to the present invention, the rotary drive shaft that is rotationally driven by the rotary drive source has two winding drums and an idler, and the conventional idler and one of the winding feed rollers are coaxial. Compared to the case where three rotary drive shafts are installed as in the conventional device, the number of rotary drive shafts is less by one, and the holding mechanism, sprocket, chain, gear, etc. are also less installed. Therefore, the weight and the size can be reduced.

The winch device of the present invention is provided with a rotatable guide roller as compared with the conventional device.
This guide roller is not driven to rotate forcibly, but is driven to rotate, does not require a sprocket gear or the like, and can be arranged in the machine frame without being bulky. Therefore, the effect of the present invention Does not reduce.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In the winch device M of the embodiment, as shown in FIG. 1, the winding drum 19, the idler 27, the pressing roller 44, the guide roller 55, etc. are arranged so as to be exposed from the front wall 1a of the machine frame 1. It is installed and configured.

As a drive source for rotating the take-up drum 19 and the idler 27, as shown in FIG. 2, the drive motor 2 including a geared motor with a brake device whose speed is controlled by an inverter drive is a rear surface. It is located on the side. A sprocket 3 is fixed to the drive shaft 2a of the drive motor 2, and a chain 4 is wound around the sprocket 3.

As shown in FIGS. 2 and 3, the chain 4 is wound around a sprocket 7 of a sprocket member 6, and the sprocket member 6 is axially supported at both ends by a front wall 1a and a rear wall 1b of the machine frame 1. The output shaft 12 is externally mounted with a bearing (not shown) and the one-way clutch 10 interposed, and is integrally formed with the sprocket 8 in addition to the sprocket 7.

The one-way clutch 10 rotates the output shaft 12 in the same direction only when the sprocket member 6 rotates in the forward direction of arrow A in FIG. When the sprocket member 6 rotates in the reverse direction, its rotational force is not transmitted to the output shaft 12.

A chain 9 is wound around the sprocket 8 of the sprocket member 6, and the chain 9 is wound around a sprocket 17 fixed to a rotary drive shaft 16 as shown in FIGS. It is hung.

The rotary drive shaft 16 has its tip projecting from the front wall 1a of the machine casing 1 and is axially supported by the front wall 1a and the auxiliary wall 1c with a bearing (not shown) interposed. In addition to the sprocket 17, a ratchet gear 18 and a winding drum 19 arranged at the tip protruding from the front wall 1a are fixed to the rotary drive shaft 16.

The take-up drum 19 has a peripheral surface with a large diameter portion 1
9a and the small diameter portion 19b are tapered so as to be juxtaposed in the axial direction. The large-diameter portion 19a is the small-diameter portion 19
It is formed on both sides of b.

A ratchet pawl 21 provided on the back side of the front wall 1a meshes with the ratchet gear 18. The ratchet pawl 21 and the ratchet gear 18 prevent the reverse rotation of the rotary drive shaft 16 when the winding drum 19 pulls the rope R in forward rotation (direction of arrow B in FIGS. 1 and 2). . Then, when the rope R is rewound after being wound, the ratchet pawl 21 is operated to be disengaged from the ratchet gear 18 so that the rotation drive shaft 16 can be rotated in the reverse direction.

Further, as shown in FIGS. 2 and 3, a pulley 13 around which a belt 14 is wound is fixed to an end portion of the output shaft 12 on the rear wall 1b side.
Besides, it is also wound around a pulley 26 fixed to the rotary drive shaft 25. Reference numeral 23 is a tension pulley that applies tension to the belt 14.

The rotary drive shaft 25 is supported by the front wall 1a and the rear wall 1b of the machine frame 1 with a bearing (not shown) interposed, and an idler 27 is attached to an end portion protruding from the front wall 1a. It is fixed.

The idler 27 has a large-diameter portion 27a arranged on both sides and a small-diameter portion 27b arranged between the large-diameter portions 27a. Adjacent to the large-diameter portion 27a away from the tip, a concave portion 27c formed with a concave groove in the circumferential direction is provided in parallel.

The front wall 1a of the rotary drive shaft 25
A brake drum 30 is provided between the rear wall 1b and the rear wall 1b with a one-way clutch 29 interposed. The one-way clutch 29 acts so as to idle the brake drum 30 when the rotary drive shaft 25 rotates in the normal direction (direction of arrow C in FIG. 2) and to rotate the brake drum 30 when the rotary drive shaft 25 reverses. To do.

A brake shoe 31 is externally mounted on the brake drum 30, and a mounting bolt 32 for inserting a bracket 36 fixed to the back wall 1b is fixed to the lower portion of the brake shoe 31. A nut 34 is screwed to the bracket 34 with a compression coil spring 35 interposed between the bracket 36 and the washer 33. Therefore, when the rotary drive shaft 25 reversely rotates, the one-way clutch 29 causes the brake drum 30 to rotate in the same direction, and at that time, due to the frictional force between the brake shoe 31 and the brake drum 30 due to the urging force of the spring 35, Resistance is given to the rotation of the rotary drive shaft 25. The reason for giving such resistance is that when the winding drum 19 is reversed and the rope R is rewound, tension is applied to the rope R between the idler 27 and the winding drum 19 so that the rope R is wound around the winding drum 19. This is because the rope R is rewound corresponding to the reverse rotation speed of the winding drum 19.

On the side of the front wall 1a of the idler 27,
The pinion gear 38 is fixed, and the pinion gear 45 is meshed with the pinion gear 45 fixed to the pressing roller 44.

As shown in FIGS. 1, 3, and 5, the presser roller 44 is axially supported on the tip (upper end) of the support shaft 43 arranged in parallel with the rotary drive shaft 25 above the concave portion 27c of the idler 27. The support shaft 43 is arranged so as to be L when viewed from the front side.
It is fixed to the tip of a lever 42 in the shape of a letter. The lever 42 is fixed to a sleeve 41 that is rotatably mounted on a support shaft 40 provided on the front wall 1a so as to project from the base portion side.

A sleeve 47 is rotatably mounted on the support shaft 40 on the base side thereof, and the lever 47 is attached to the sleeve 47.
8 is fixed. This lever 48 has a sleeve 47
From the upper side of the pressing roller 4 in parallel with the lever 42.
4 has a shape in which it extends in the vicinity of the pressing roller 44, passes through the rear surface side, extends in a substantially horizontal direction, and a grip portion 48a is formed at the tip. Further, on the base portion side of the lever 48, the bracket portion 48 b arranged above the lever 42.
Is stuck. And, in the bracket portion 48b,
A support rod 49 that extends downward near the pressing roller 44 and is inserted into the insertion hole 42a of the lever 42 is fixed, and the lever 42 and the lever bracket portion 4 are attached to the support rod 49.
A compression coil spring 50 whose both ends are in contact with 8b is externally mounted. Further, on the front wall 1a of the lever 48 near the grip portion 48a, the hook 52 having the recess 52a is provided.
Is fixed and the lever 48 is locked in the recess 52a of the hook 52, so that the biasing force of the compression coil spring 50 is
The lever 42 is pressed down, and the pressing roller 44 is urged toward the concave portion 27c of the idler 27.

On the left side of the concave portion 27c of the idler 27 on the front wall 1a, as shown in FIG. 1, a support shaft 54 rotatably supporting a guide roller 55 is arranged. The guide roller 55 is used for the large diameter portion 2 of the idler 27.
It is arranged in order to smoothly guide the rope R wound around the small diameter portion 27b to the concave portion 27c.

Further, on the right side of the winding drum 19 of the front wall 1a, three rotatable guide rollers 57, 58, 59 are arranged to guide the rope R to the winding drum 19. There is. The guide rollers 57 and 58 have their axial directions in the horizontal direction, and the guide rollers 59 have their axial direction in the vertical direction.

Further, on the left side of the upper surface of the machine casing 1, an operation panel 63 to which electricity is supplied from a lower power cord 67 is arranged. The operation panel 63 is provided with a dial for adjusting the winding speed and an overload. A display device for displaying is arranged.

A pendant switch 65, which is connected to the operation panel 63 with a cord 64 interposed therebetween, is provided below the front wall 1a of the machine frame in consideration of operability. This pendant switch 65 is a normal switch 6
5a and reverse rotation switch 65b, each switch 65a
The drive motor 2 can be rotated normally or reversely by pressing and holding 65b respectively.
The rotation of the drive motor 2 can be stopped by stopping the pressing operation of 5b.

Reference numeral 61 is a guide tube which is arranged on the front wall 1a and through which the rope R is inserted.
Is constituted by disposing a lever 61d between the half-split tube portions 61a and 61b and a half-split tube portion 61c rotatably held with respect to the half-split tube portions 61a and 61b. 61d is gripped so that the opening 61e of the half-split cylinder portion 61c is aligned with the openings (not shown) of the half-split cylinder portions 61a and 61b, so that the rope R can be taken in and out of the guide cylinder 61. . This guide tube 61 is for guiding the rope R to the concave portion 27c of the idler 27 when the rope R is unwound, even if the end of the wound rope R is entangled. It is a thing. In addition, the guide cylinder 61 is held on the front wall 1a so as to be movable in the axial direction in consideration of the case where the rope R is entangled and cannot be untied. It is arranged to be turned on. If the limit switch (not shown) is turned on, the drive motor 2
It will function as an emergency stop for the reverse rotation.

Reference numeral 1d is a caster with a flare, which is arranged below the winch device M.

When using the winch device M of this embodiment, first, the rope R is attached. In that mode, the middle of the rope R is gripped and placed on the guide rollers 57, 58, and 59, and the rope R is wound around the large diameter portion 19a to the small diameter portion 19b about five times. Then, the rope R extending from the small diameter portion 19b of the winding drum 19 is wound around the large diameter portion 27a of the idler 27 around the small diameter portion 27b about twice. Then, the rope R extending from the small diameter portion 27b of the idler 27 is wound around the guide roller 55. Further, the lever 48 is removed from the concave portion 52a of the hook 52 and the pressing roller 44 is kept away from the concave portion 27c of the idler 27, and the rope R wound around the guide roller 55 is changed from below to the concave portion 27c of the idler 27. The lever 48 is wound around and locked in the recess 52a of the hook 52. And
Holding the lever 61d, each half tube portion 6 of the guide tube 61
The openings R of 1a, 61b, and 61c are aligned, and the rope R passing through between the concave portion 27c and the pressing roller 44 is arranged in the guide cylinder 61, and the lever 61d is operated to operate the half cylinder portion 61c. The opening 61e of the other half of the half-split cylinder 61a.
If the rope R is displaced from the opening (not shown) of 1b so as not to come off from the guide cylinder 61, the attachment of the rope R can be completed.

Thereafter, if the forward rotation switch 65a of the pendant switch 65 is turned on, the drive shaft 2 of the drive motor 2 is turned on.
a is rotated in the normal direction, and is passed through the sprocket 3, the chain 4, the sprocket 7, 8 of the sprocket member 6, the chain 9, and the sprocket 17 together with the rotary drive shaft 16 and the winding drum 1.
9 rotates forward. At the same time, since the output shaft 12 also rotates in the normal direction via the one-way clutch 10, the idler 27 also rotates in the normal direction together with the rotary drive shaft 25 via the pulley 13, belt 14 and pulley 26.

When the take-up drum 19 and the idler 27 are normally rotated by the rotational drive of the rotary drive shafts 16 and 25, respectively, the outer peripheral surfaces of the large diameter portions 19a and 27a and the small diameter portions 19b and 27b are removed. , Exerts frictional force, and the pressing force of the coil spring 50 causes the pressing roller 4 to move.
Since the rope R is sandwiched between the No. 4 and the idler concave portion 27c, the large diameter portion 19 of the winding drum 19 and the idler 27 is formed.
The frictional force on the outer peripheral surface of the a / 27a / small-diameter portion 19b / 27b increases, so that the rope R is strongly towed. By operating the speed adjustment dial of the operation panel 63, the tow speed of the rope R can be adjusted. The rope R can be pulled at a predetermined speed.

Even when the rope R is suddenly loaded during the towing operation and the winding drum 19 tries to reverse, the ratchet gear 18 fixed to the rotary drive shaft 16 meshes with the ratchet pawl 21. The reversal is prevented.

After the rope R is pulled, the rope R
When rewinding, the ratchet pawl 21 is disengaged from the meshing position with the ratchet gear 18, and the reverse switch 65b of the pendant switch 65 is turned on. Then, the drive shaft 2a of the drive motor 2 reversely rotates, and the sprocket 3, the chain 4, the sprocket 7 of the sprocket member 6,
The winding drum 19 is rotated in the reverse direction together with the rotary drive shaft 16 via the 8-chain 9-sprocket 17.

On the other hand, by the one-way clutch 10, the output shaft 12 and the rotary drive shaft 25 do not rotate in reverse due to the driving force of the motor 2, but the rope R is unwound due to the reverse rotation of the winding drum 19. Due to the frictional force between the idler 27 and the rotary drive shaft 25 and the output shaft 12, the idler 27 rotates in the reverse direction. At that time, the one-way clutch 29 causes the brake drum 30 to reversely rotate integrally with the rotary drive shaft 25.
The frictional force with 0 adds resistance to the rope R, and the rope R is rewound corresponding to the reverse rotation speed of the winding drum 19.

When the rewinding operation of the rope R is completed, the pressing operation of the reverse rotation switch 65b is stopped, the operation of the drive motor 2 is stopped, and the rope R is removed from the winch device M in the reverse of the operation described above. Just remove it.

Then, in the winch device M of the embodiment, the rotary drive shafts 16 and 25 which are rotationally driven by the drive motor 2 as the rotary drive source are the winding drum 19 and the idler 27.
As compared with a conventional device having three rotary drive shafts, the rotary drive shaft has one rotary drive shaft and the conventional idler and one winding feed roller are coaxial with each other. Since the number of holding units and the arrangement of the holding mechanism, the sprocket, the chain, the gear, and the like are reduced as much as the number of units, the weight and the size can be reduced. By the way, the apparatus of the embodiment is a type having a traction capacity of 1200 kgf, and the weight of the apparatus M can be 75 kg, which is half the weight of the conventional apparatus having the same capacity. .

[Brief description of drawings]

FIG. 1 is a front view of a winch device showing an embodiment of the present invention.

FIG. 2 is a rear view of the embodiment.

FIG. 3 is a vertical sectional view of the embodiment.

FIG. 4 is a vertical sectional view of another portion of the embodiment.

FIG. 5 is an enlarged front view showing the pressing roller of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Machine frame, 1a ... Front wall, 2 ... (Rotation drive source) drive motor 2, 16/25 ... Rotation drive shaft, 19 ... Winding drum, 19a ... Large diameter part, 19b ... Small diameter part, 27 ... Idler, 27a ... Large diameter part, 27b ... Small diameter part, 27c ... Recessed part, 38/45 ... (Interlocking mechanism) Pinion gear, 44 ... Pressing roller, 55 ... Guide roller, M ... Winch device, R ... Rope.

Claims (1)

[Claims] 1. Two rotary drive shafts connected to a rotary drive source are projected from the machine frame, and a large diameter portion and a small diameter portion are axially arranged side by side at the tip of one of the rotary driving shafts. A winding drum is fixed, and at the tip of the other rotary drive shaft, a large diameter portion and a small diameter portion are arranged in the axial direction, and further, an idler in which a concave portion is arranged is fixed, Around the concave portion of the idler, a rotatable guide roller, and a pressing roller that is biased toward the concave portion of the idler and rotates in conjunction with the idler via an interlocking mechanism,
Are arranged with their respective axial directions parallel to the axial direction of the idler, the rope is wound several times from the large diameter portion of the winding drum to the small diameter portion, and then from the small diameter portion of the winding drum. The extending rope is wound several times from the large diameter portion of the idler to the small diameter portion, and the rope extending from the small diameter portion of the idler is wound around the guide roller and then wound around the concave portion of the idler. A winch device configured to be discharged through a space between the concave portion and the pressing roller.