JP2003012279A - Random winding preventive device of winding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a random winding preventive device capable of securely winding up a wire rope by a simple structure without randomly winding the wire rope when the tension force of the wire rope to be wound varies. SOLUTION: Plural presser rollers 11 and 11' in the circumferential direction are attached at both ends of a support member 14 which is supported like a see-saw for the wire rope R wound around a winding drum 3 in multi-layers. The rollers 11 and 11' are pivoted by a movable arm 16 with an energizing means (tension spring 23) to be pressed in the centripetal direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for preventing irregular winding of a winding drum such as a winch that drives a wire rope in a lifting machine, and more specifically, a plurality of rope pressing rollers are arranged so that the rope can be wound up. The present invention relates to an irregular winding prevention device for a winding drum, which can prevent the irregular winding from being separated from the drum.

[0002]

2. Description of the Related Art Generally, in a winch for winding and unwinding a wire rope in a lifting machine such as a crane, it is necessary to correctly wind the wire rope wound around a drum. Therefore, the wire rope that is wound around the winch drum is wound while maintaining the tension so that it is sequentially wound around the groove formed between the ropes that are wound earlier. . To do this, a rope guide is often provided.

However, when the tension of the wire rope is momentarily relaxed for some reason during the driving operation, the wire rope wound around the drum may float. If the lifting amount is large, the winding groove position of the wire rope wound around the drum may be displaced,
The wire rope wound in the upper layer bites into the groove formed by the wound wire rope,
It will come off, and normal winding will not be performed, and a random winding state will occur. When such a random winding occurs,
The wire rope will be kinked or the wire will break, causing it to break and creating a dangerous condition. In order to prevent such a situation from occurring, an irregular winding prevention device is attached. As this irregular winding prevention device, many devices have already been proposed and put into practical use.

A device for preventing irregular winding of the wire rope around the winding drum is disclosed in, for example, Japanese Patent Laid-Open No. 64-34896. In this device, one wire rope retainer, which is applied with a spring bias in the direction of approaching the drum surface, is arranged on one side of the winding drum of the wire rope, and the other side of the winding drum approaches the drum surface. A member for detecting the floating of the wire rope is placed so that the wire rope can be pressed against the drum surface side by one rope presser with the spring biasing force at all times to be wound, and if the loosening of the wire rope causes the detecting member to detect the floating. ,
It is described that the winding is stopped to prevent irregular winding.

[0005]

In the conventional winding irregularity prevention device for the winding drum of the wire rope as described above,
Since one rope pressing roller is arranged and the rope pressing roller is pressed against the drum side by the urging force of the spring, there is a problem that a sufficient effect of preventing random winding cannot be exhibited. That is, when the tension force acting on the rope is normally wound, no problem occurs, but if the tension force acting on the rope changes and loosens, there is no regulation in the width direction of the winding drum. Therefore, even if the wire rope to be wound does not fit properly in the groove and is wound, it is not regulated.Therefore, if the wire rope is wound around the upper step next, it will be in an abnormal state and The rope wound on the upper side becomes caught in the layer, which causes irregular winding.

In short, the conventional irregular winding prevention device is premised on that the winding tension of the wire rope with respect to the winding drum is always kept constant, and in the case where the tension of the wire rope changes depending on the working situation. Has not been dealt with. Therefore, the occurrence of irregular winding may not be prevented even if the irregular winding prevention device is provided. As described above, there is a problem that a reliable means for preventing random winding is not obtained at present. In particular, when the wire rope is wound in multiple layers on the winding drum, the occurrence rate of irregular winding is high, and therefore it is necessary to prevent it more reliably.

The present invention has been made in view of the above circumstances, and provides an irregular winding prevention device for a winding drum, which has a simple structure and can be reliably wound even if the tension of a wire rope to be wound varies. The purpose is to do.

[0008]

In order to achieve the above-mentioned objects, an apparatus for preventing irregular winding of a winding drum according to the present invention includes a wire rope wound around a winding drum in a circumferential direction. In addition, a plurality of pressing rollers are provided so as to be supported by a support body having a biasing means and pressed in the centripetal direction.

According to the present invention, a plurality of pressing rollers, which are constantly applied with a biasing force in the centripetal direction, are arranged at appropriate intervals in the circumferential direction and abut against the wire rope wound around the winding drum. Even if the tension applied to the wire rope may change, the presser roller, which is basically located far from the wire rope payout side, constantly presses the part of the wire rope that is wound around the drum to prevent it from floating. To do. According to the present invention, since the biasing force is constantly applied by the plurality of pressing rollers to press the wire rope wound around the winding drum in the centripetal direction, the tension applied to the wire rope during winding and unwinding of the wire rope. Even if there is fluctuation, the presser roller at a position farther than the position away from the drum will push the rope against the winding surface to prevent it from rising, and the rope will not be disturbed at the winding section. . Therefore, there is an effect that irregular winding can be prevented and reliable winding / unwinding can be performed.

The wire rope pressing roller is provided with a biasing force applied by a biasing means at a position where the rope is wound around the winding drum and at a position where the rope is wound at an appropriate distance. It is better to be done (2nd invention). By doing so, the wire rope is pressed to the drum side by the pressing roller at the position where the wire rope is wound around the winding drum, so that the wire rope is sequentially wound on the drum in a predetermined order and is wound up. The wound position is maintained along the groove formed by the lower winding rope, and the cause of irregular winding does not occur. Also, since the rope is pressed by the other pressing roller at a position already wound apart from the winding position, even if the pressing roller at the rope winding position on the drum may float up, the subsequent position Since the state of the rope wound by the pressing roller can be maintained, the normal state can be maintained without disturbing the winding state of the rope. In other words, the occurrence of irregular winding can be prevented.

The pressing roller of the wire rope is supported in parallel with two ends of a supporting member, which is supported in a seesaw shape at a middle position by a supporting member having a biasing means, at a required interval, and is supported by the supporting member. It is preferable that the both pressing rollers are provided so as to be pressed against the winding drum in the centripetal direction (third invention). By doing this, the two pressing rollers normally contact the rope on the winding drum around which the wire rope is wound under the same conditions to press the rope,
When the rope being wound up floats on the side of contact with the drum due to some external force, and the holding roller located on the side of winding the rope with respect to the drum moves in a direction away from the drum axis, it is supported like a seesaw. The pressing roller on the opposite end side of the member presses the rope wound around the drum more strongly. Therefore,
When the rope tries to lift up at the winding part, the subsequent rope part is strongly pressed on the contrary, and as a result, the winding state can be maintained without causing looseness, and the occurrence of irregular winding is prevented. It can be prevented.

The pressing roller of the wire rope is supported in parallel at a predetermined interval on both ends of a supporting member whose intermediate position is supported in a seesaw shape at the tip of the movable arm.
A base end of the movable arm is pivotally supported by a bracket attached to a support frame of the winding drum or a support provided in the vicinity thereof, and the two pressing rollers are wound in a centripetal direction with respect to the drum axis by an attached biasing means. It is preferable that the taken wire rope is pressed (fourth invention).
In this case, the pressing force by the two pressing rollers against the wire rope on the winding drum acts on the movable arm that supports the two pressing rollers in a seesaw shape by the biasing means (for example, the tensile force by the tension spring). By doing so, even if the winding diameter of the drum changes, it can always be pressed in the centripetal direction, so the relative positional relationship between the rope and the winding drum can be kept constant, and irregular winding can be reliably prevented. be able to.

In the first to fourth aspects of the invention, the pressing roller is preferably formed with tapered portions so that both axial ends thereof have a diameter smaller than the diameter of the intermediate portion (fifth aspect). invention). By doing this, the rope can be pressed by intersecting the raised portions at the wire rope winding and turning portions at both ends in the width direction of the drum, and excessive pressing of the rope against the turning portion and lifting of the roller at the portion adjacent to the turning portion. Can be prevented.

The pressing roller and its supporting portion are formed by dividing the pressing roller into three parts in the width direction of the drum, and a roller intermediate piece supported so as to be sandwiched between the tip ends of the supporting members, and both sides of the intermediate piece. And a support shaft piece for supporting the roller both side pieces is connected to the shaft core of the intermediate piece and is rotatable with respect to the support member. This is the configuration provided (sixth invention). By doing so, the pressing roller can be attached to one movable arm via the support member, and can correspond to the entire width of the winding drum in the width direction.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Next, specific embodiments of an irregular winding prevention device for a winding drum according to the present invention will be described with reference to the drawings. This embodiment will be described as applied to a random winding prevention device in a winch drum.

FIG. 1 is a side view of the winch of the present embodiment excluding a supporting portion on one side. 2 is a view taken along the line AA of FIG. 1, FIG. 3 is a cross-sectional view showing the pressing roller and its supporting portion, and FIG. 4 is a view showing the surface portion of the winding drum.

The winch 1 of the present embodiment is one of the drums 3 having a required size, which is axially supported by a supporting frame 2 by a well-known means and is driven by a driving machine (not shown). The wire rope random winding prevention device 10 is provided side by side. In this embodiment, the reverse rotation preventing ratchet 6 is attached to one side surface of the drum 3 so that the ratchet 7 can be reversed when it is removed from the ratchet 6 by the remote control member. Has been done.
Reference numeral 8 in the drawing denotes a claw piece operating rod.

The wire rope irregular winding prevention device 10 is
The pressing roller 1 of the rope R is attached to the winding tangent portion of the wire rope R (hereinafter, simply referred to as the rope R for the sake of description) with respect to the drum 3 and a portion appropriately displaced from the winding to the winding side.
1, 11 'are supported on both ends of a support member 14 supported by a movable arm 16 in a seesaw shape, and the drum 3
It is arranged so as to press in the centripetal direction with respect to the shaft center of. Further, the movable arm 16 is provided with a biasing means (tensile spring) connected to the support bracket 20 so that the rope pressing force acts on the pressing rollers 11 and 11 '.

The pressing rollers 11 and 11 '(which will be described below with reference numeral 11 because they have the same structure, unless otherwise necessary for explanation) are pressed against the rope R over substantially the entire winding width of the drum 3. The length dimension is set so that the force can function, and the length is set so as to fit between the both side collar plates 3a and 3b of the drum 3. Further, as shown in FIG. 3, the presser roller 11 is divided into three parts so as to be supported by the support member 13, and both side parts are provided with respect to the shaft part 11a 'of the intermediate part part 11a located at the center thereof. 11b, 11
A support shaft 12 penetrating the shaft center of b is connected coaxially by a connecting bolt 13, and is rotatably supported at both tip ends of a support member 14 supported in a seesaw shape.

Support member 1 supporting the press roller 11
4 is composed of two pieces that are parallel to each other at a predetermined interval.
At both ends of the support member 14, rolling bearings 15 and 15 are fitted to the ends of the two-part pieces that are formed, respectively, and the intermediate part piece 11a of the pressing roller 11 is placed between the two part pieces of the support member 14. While interposing, side pieces 11b of the pressing roller 11 are fitted and inserted on both outer sides so that the ends of the support shafts 12 are supported by the rolling bearings 15, respectively. The tip ends of the connecting bolts 13 and 13 that can be fastened from the outside through the shaft core are screwed into the shaft core 11a ′ of the intermediate piece 11a to be integrally connected,
The three pieces 11b, 11a ', and 11b are integrated to be rotatably supported at the end of the support member 14. The outer circumference of the end of the support member 14 is the pressing roller 1.
It is formed on the peripheral surface that is the same as or slightly smaller than the outer diameter of No. 1 so as not to come into direct contact with the rope R.

Further, both side pieces 11 of the pressing roller 11
In b, the base side has the same outer diameter as the intermediate part piece 11a, the tip part has a small diameter, and the middle part thereof is formed in a tapered shape, and the pressing roller 11 as a whole is formed in a spindle shape. . In addition, the both ends of the pressing roller 11 are connected to the drum 3
At the winding reversal portion 3e of the rope R at the widthwise end of the drum 3 at the end of the drum 3 in the width direction of the drum 3 in which the rope winding groove 3c is connected to the notch for attaching the butt of the rope. It has a small diameter for exchanging climax.

Further, the movable arm 16 for supporting the supporting member 14 in a seesaw shape is provided on the upper surface of a pen glass-like bracket 20 attached to the side surface of the intermediate portion of the connecting member 4 for connecting the lower portions of the left and right supporting frames 2. On the supporting part 21,
The base support shaft 17 is arranged so that the base is parallel to the axis of the drum 3.
It is supported by and is formed into a boomerang type in side view. From the drum 3 side in a use state from a straight line s connecting the support shaft cores of the pressing rollers 11 and 11 ′ supporting the movable arm 16 at the middle portion of the support member 14 at both ends of the support member 14. A pin 18 is connected in parallel with the base support shaft 17 to pivotally support the support member 14 at a position separated by an appropriate distance to the outside.

At the intermediate portion of the movable arm 16, a tension spring 23 is stretched between the front end portion of the bracket 20 and a projecting piece 22 protruding from the bracket 20. Rope R in which 11 'is wound around the drum 3
It is configured so that it is urged so as to come into contact with and be pressed.
The tension spring 23 corresponds to the urging means of the present invention. Therefore, the biasing means may be a push spring, a fluid pressure damper, or the like, other than the tension spring 23.

In the winch drum irregular winding prevention device 10 thus constructed, when the rope R is wound around the drum 3, a position P where the rope R is wound tangentially to the drum 3 and a little more than that. Pressing rollers 11 and 11 'are arranged at a position Q around which the rope R is wound, and the pressing rollers 11 and 11' are pivotally supported on the tip of the movable arm 16 at a middle position in a seesaw shape. The tension spring 23 is supported by the support member 14.
A pressing biasing force is applied by. The pivot point between the support member 14 and the tip of the movable arm 16 is located outside (on the side away from the drum 3) from the line s connecting the axes of the pressing rollers 11 and 11 '. Therefore, the urging force of the tension spring 23 causes the pressing roller 11,
It acts substantially evenly on 11 'and functions so that the rope R is pressed and wound up without floating.

While the rope R is kept wound around the drum 3 in this way, the tension acting on the rope R is changed by some external force, and even if the tension is temporarily relaxed, for example, Presser rollers 11, 1
The rope R can be correctly wound by the pressing action of 1 '. If a situation occurs in which the pressing roller 11 at the tangential position P floats up, the support member 14 pivotally supported by the tip of the movable arm 16 is supported in a seesaw shape as described above and is pressed by the tension spring 23. Since the force acts on the pressing rollers 11 and 11 'via the support member 14, the displacement due to the lifting of one pressing roller 11 causes the other pressing roller 11' to move to the rear position by a couple force associated with the displacement. An attempt is made to press the wound rope R more strongly, and the reaction force acts on the lifting-side pressing roller 11, and as a result, the lifting of the rope R is prevented.

In this way, in the irregular winding prevention device 10 of the present embodiment, the two pressing rollers 11, 11 'act relatively to each other and function to keep the winding of the rope R around the drum 3 normal. Therefore, the occurrence of irregular winding can be prevented in advance, and it can be utilized as a stable winch.
Further, since it can be structurally simple, it can be said to be excellent in long-term use.

Further, since the supporting structure of the pressing roller 11 is supported at the central portion in the width direction of the roller, it is possible to exert an urging force on the rope on average without being biased during the pressing operation. . By making both ends of the pressing roller 11 thin, even if the winding order of the rope R around the drum 3 reaches the reversing position, and when continuing to the stable state, an excessive load is not applied. Since it can be treated, it does not damage the rope.

In the above description, as a means for supporting the pressing roller, the tension spring 23 is added to the movable arm 16 whose base end is pivotally supported on the bracket 20 attached to the connecting member 4 connecting the supporting frame 2 of the drum. However, instead of this, a support structure of a random winding prevention device that can accommodate the drum width is arranged side by side with a member that supports the winding drum, and this support structure corresponds to the movable arm. It is possible to adopt a configuration in which the member is projected toward the drum side, and the member supporting the pressing roller is supported at the tip of the member in a seesaw shape so that the biasing force can be applied to the supporting member.

If necessary, the pressing roller formed by the above-mentioned seesaw-type supporting member and another pressing roller may be arranged at subsequent positions, and the rope may be wound and held by two or more pressing rollers. It can also be done.

Needless to say, the device for preventing irregular winding of the wire rope winding drum according to the present invention can be applied to a wire rope handling device in equipment and facilities including a winding drum for multi-layer winding in addition to a winch drum.

[Brief description of drawings]

FIG. 1 is a side view of a winch of the present embodiment with a supporting portion on one side removed.

FIG. 2 is a view taken along line AA of FIG.

FIG. 3 is a cross-sectional view showing a pressing roller and a supporting portion thereof.

FIG. 4 is a diagram showing a surface portion of a winding drum.

[Explanation of symbols]

1 winch 2 support frame 3 drums 4 connecting members 10 Unwinding prevention device 11, 11 'Presser roller 14 Support members 16 movable arm 17 Base support shaft of movable arm 18 pin 20 bracket 23 tension spring R rope

Continued front page    (72) Inventor Shigenori Matsushita             3-1-1 Ueno Stock Market, Hirakata City, Osaka Prefecture             Company Komatsu Manufacturing Osaka Plant

Claims (6)

[Claims] 1. A plurality of pressing rollers are provided so as to be circumferentially supported on a wire rope wound in multiple layers around a winding drum and supported in a centripetal direction by being supported by a support body having a biasing means. An irregular winding prevention device for a winding drum. 2. The wire roller pressing roller is biased by a biasing means at a winding tangential position of the rope with respect to the winding drum and at a position where the rope is wound at an appropriate distance. The irregular winding prevention device for a winding drum according to claim 1, which is provided. 3. The pressing roller of the wire rope is supported in parallel at a predetermined interval on both ends of a supporting member, which is supported in a seesaw shape at a middle position by a supporting member having a biasing means, and is supported by the supporting member. The device for preventing irregular winding of a winding drum according to claim 1 or 2, which is provided so as to press both the pressing rollers against the winding drum by a body. 4. The pressing roller of the wire rope is supported in parallel at a predetermined interval at both ends of a support member, which is supported in a seesaw shape at the tip of the movable arm at an intermediate position. A base end of which is pivotally supported by a bracket attached to a support frame of the winding drum or a support provided in the vicinity thereof, and the both pressing rollers are wound in a centripetal direction with respect to the drum axis by an attached biasing means. The irregular winding prevention device for a winding drum according to claim 1, wherein the wire rope is pressed against the winding drum. 5. The winding according to any one of claims 1 to 4, wherein the pressing roller is formed so that both end portions in the axial direction of the pressing roller are tapered with a diameter smaller than a diameter of an intermediate portion. Drum irregular winding prevention device. 6. The pressing roller and its supporting portion are divided into three parts in the width direction of the drum of the pressing roller, and the roller middle part is supported so as to be sandwiched by the tip of the supporting member, and the middle part of the roller middle part. It is formed of a roller both side piece having a reduced diameter portion arranged on both sides, and a support shaft piece for supporting the roller both side piece is connected to the shaft core of the intermediate piece and is rotated with respect to the support member. The irregular winding prevention device for a winding drum according to any one of claims 1 to 5, wherein the irregular winding prevention device is configured so as to be possible.