JP3765621B2 - Winch random winding prevention device - Google Patents

Description

BACKGROUND OF THE INVENTION
[0001]
[Industrial application fields]
TECHNICAL FIELD The present invention relates to a winch turbulence prevention device equipped in a rope type transporter.
[0002]
[Prior art]
The main rope and traveling rope are stretched in the air, the aircraft is suspended and supported by the main rope, the running drum around which the traveling rope is wound is driven to move the aircraft, and the winch drum around which the wire is wound is driven. A rope-type transporter for suspending a load is known (for example, Japanese Patent Application No. 6-282816). Since such a rope-type transporter is in the air and cannot be immediately inspected by people, malfunctions of equipment must be prevented as much as possible, even in the case of winches.
[0003]
In the case of winches, wire winding is most scary. For this reason, although the detection apparatus which detects the slack of the wire which is the cause of disorder winding is provided, in the above-mentioned prior example, the malfunction was detected by the slack of the wire which winds from the winch drum. That is, when the tension of the wire falls below a certain level, a turbulent winding warning is issued.
[0004]
[Problems to be solved by the invention]
However, the position of the wire unwinding from the winch drum (the distance from the center of the drum) varies depending on the unwinding amount of the wire. May not work properly.
The present invention solves such a problem, and provides an apparatus for preventing irregular winding that operates normally regardless of the amount of unwinding of the wire.
[0005]
[Means for Solving the Problems]
Under the above problems, the present invention stretches the main rope and the traveling rope in the air, suspends the aircraft from the main rope, drives the traveling drum around which the traveling rope is wound, moves the aircraft, and In a rope-type transporter that drives a winch drum around which a wire is wound to suspend a load, a detection arm that advances and retreats according to the tension of the chain is provided on the outer side of the drive side that is the wire winding side of the chain that drives the winch drum. Provided is a winch random winding prevention device characterized in that when a chain is loosened, a detection arm approaches the chain and operates a switch to detect the slack of the wire.
[0006]
Since the present invention takes the above-described means, the switch is not related to the amount of wire unwinding. Further, since the detection arm is provided on the drive side of the chain that drives the winch drum, it corresponds to the tension of the wire. Thus, the switch operates correctly when a certain amount of sag occurs in the wire.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 4 is an explanatory view showing the state of use of the rope-type transporter. This rope-type transporter travels between the main rope 10 and the traveling between two fixed points (for example, a solid tree) in a forest or the like. The rope 12 is stretched up and down, the main rope 10 is used to suspend the airframe 14, and the traveling rope 12 is moved by hand.
[0008]
FIG. 2 is a side view of the rope type transporter, and FIG. 3 is a plan view, but the front suspension roller 16 and the rear suspension roller 18 are attached to the airframe 14 in a state where they are extended upward. The support rollers 16 and 18 are suspended from the main rope 10 to suspend the airframe 14 in a movable manner. In this example, the rear suspension roller 18 is fixed to the machine body 14, but the front suspension roller 16 is attached with two extendable and extendable arms 20 extending horizontally from the machine body 14. It is attached to.
[0009]
A traveling drum 26 to which power is transmitted by an engine 22 and a mission 24 is also attached to the airframe 14, and the traveling rope 12 is wound around the traveling drum 26 a few times. Thus, when the traveling drum 26 is driven, the machine body 14 can move.
[0010]
A winch 28 is also provided. The winch 28 includes a winch drum 30 provided on the body 14 and a guide roller 32 provided at the tip of the overhanging arm 20, and a wire 34 is unwound from the winch drum 30 and attached to the tip of the overhanging arm 20. It is wound around the guide roller 32 and fed downward.
[0011]
The traveling drum 26 is driven by attaching a two-stage chain 38 between the sprocket 34 provided therewith and the output sprocket 36 of the mission 24. The winch drum 30 is also driven by placing a chain 44 between the sprocket 40 provided therewith and the output sprocket 42 of the mission 24 (46 is a tension pulley).
[0012]
FIG. 1 is a side view of the main part showing the drive configuration of the winch drum 30, but it rotates around the support shaft 48 on the drive side of the chain 44 that drives the winch drum 30 (drive side when the wire 34 is wound). A possible detection arm 50 is provided, and a disc body 52 that contacts the chain 44 is attached to the tip of the detection arm 50.
[0013]
In addition, a pin 54 is provided at the tip of the detection arm 50, and the pin 54 is pulled by a spring 56 in a direction in which the disc body 52 presses against the chain 44. Further, a switch 58 is provided that operates when the detection arm 50, that is, the pin 54 approaches the chain 44 side by a certain amount.
[0014]
As described above, when the wire 34 unwound from the winch drum 30 is loosened, the torque required for driving the winch drum 30 is lowered and the chain 44 is also loosened. Then, the detection arm 50 is pulled by the spring 56, and the pin 54 activates the switch 58 to warn of the looseness of the wire 34, that is, its turbulence. When the switch 58 is actuated, appropriate measures such as a buzzer sound or automatic stop of the winch drum 30 are taken.
[0015]
By the way, the above description is an example of embodiment of this invention, and this invention is not limited to these. For example, the operation of the switch is not limited to being performed by a pin, but may be performed by the detection arm itself. Further, the disc body that abuts on the chain may be rotatable, and the one that abuts on the chain is not limited to a disc-like one.
[0016]
【The invention's effect】
As described above, according to the present invention, since the detection arm is provided on the drive side of the chain that drives the winch drum, the wire unwinding amount corresponds to the tension of the wire and a certain amount of looseness occurs in the wire. Regardless of the switch operates correctly. Therefore, it is possible to reliably prevent a situation such as disconnection or breakage of the wire due to random winding, and to perform the winch operation safely.
[Brief description of the drawings]
FIG. 1 is a side view of an essential part of a winch drive configuration showing an example of the present invention;
FIG. 2 is a side view of a rope-type transporter showing an example of the present invention.
FIG. 3 is a plan view of a cable-type transporter showing an example of the present invention.
FIG. 4 is an explanatory diagram of a use state of a cable-type transporter showing an example of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main rope 12 Running rope 14 Airframe 26 Running drum 28 Winch 30 Winch drum 34 Wire 44 Chain 50 Detection arm 56 Spring 58 Switch

Claims (2)

The main rope and traveling rope are stretched in the air, the aircraft is suspended and supported by the main rope, the running drum around which the traveling rope is wound is driven to move the aircraft, and the winch drum around which the wire is wound is driven. In a rope-type transporter that suspends a load, a detection arm that advances and retreats according to the tension of the chain is provided outside the drive side , which is the wire winding side of the chain that drives the winch drum. An apparatus for preventing random winding of a winch, wherein a slack of a wire is detected by operating a switch when approaching a chain .   2. The winch random winding prevention device according to claim 1, wherein the detection arm is pivotable about a support shaft and is pressed against the chain by a tensile force of a spring.

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