JPS5851190Y2 - electric winch - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an electric winch that is placed at the front and rear of a special cargo handling vehicle.

Conventionally, in this type of electric winch, when winding the wire rope on the drum and storing it in the unlined state,
The hook at the end of the wire rope may get caught in the drum due to the winding, or the wire rope may be wound up excessively due to inertia even after the motor has stopped, which may lead to problems such as twisting, breaking, or breaking the wire rope. was there.

In view of these circumstances, the object of this invention is to provide an electric winch that can prevent the wire rope from becoming too entangled.

Hereinafter, the configuration of this invention will be explained in detail according to embodiments shown in the drawings.

Figures 1 and 2 are partially cutaway views of the main parts of the on-vehicle electric winch, showing the back of frame 1 (the first
A drum 2 that is rotationally driven by torque transmission from a motor 3 is disposed on the right side of the figure.

A wire rope 4 is wound around the drum 2 as is generally known, and the wire rope 4 is wound around the drum 2 by the rotation of the drum 2 as the motor 3 operates in the forward and reverse directions. , and are sent out.

Arc-shaped guide grooves 7 are provided on both side plates 1a of the frame 1.
are formed respectively.

Both ends of each shaft 9 of the pair of upper and lower horizontal rollers 8 are passed through these grooves 7, and washers 18 and nuts 19 are inserted into the ends of these shafts 9 from the outside of the side plate 1a.
is fixed to prevent its removal.

Moreover, a spring 10 is installed between both ends of each shaft 9 and each guide groove 7.

That is, both lateral rollers 8 are urged in the direction of being pressed against each other by the elastic force of the spring 10, and are elastically supported so that they can move along the guide groove 7 in this state. .

Furthermore, a guide shaft 11 extending toward the front of the winch (to the left in FIG. 1) is fixed to both ends of each of the shafts 9 in a cantilevered manner.

These four guide shafts 11 have a window 1 in the center.
A detection plate 12 having a
The detection plate 12 is always biased to the left in FIG. 1 by a coil spring 14 disposed around each guide shaft 11 as an axis. .

Further, the front end of a rod 15 that passes through both rollers 8 and extends to the rear of the frame 1 is connected to this detection plate 12, and the rear end of this rod 15 is rotatably provided at the back of the frame 1. The switch arm 16 is connected to one end of the switch arm 16.

The other end of this arm 16 is arranged so that it can press a button 17a of a limit switch 17 built into the electric circuit of the motor 3.

The electric circuit of the motor 3 is turned off by pressing the button 17a of the limit switch 17, and the rotation of the motor 3 is stopped.

Note that the wire rope 4 wound around the drum 2 is pulled out from the window 13 of the detection plate 12 to the front of the winch (to the left in FIG. 1) passing between the horizontal rollers 8, and its tip A hook 5 is fixed to.

A disk-shaped stopper 6 that cannot pass through the window 13 of the detection plate 12 is attached to the base of the hook 5 (see mainly FIG. 2).

In the above configuration, a case will be described in which the wire rope 4 is wound around the drum 2 and stored in a non-tracted state.

It is now assumed that the wire rope 4 that has been pulled out from the drum 2 is being continuously wound up by the rotation of the drum 2 driven by the motor 3.

When the winding of the wire rope 4 reaches its final state, the stopper 6 fixed to the hook 5 collides with the detection plate 12, and the detection plate 12 is strongly pushed to the right in FIG.

As a result, the detection plate 12 moves against the elasticity of the coil spring 14, and as a result, the rod 15 and the arm 1
Button 17a of limit switch 17 through the movement of 6
is pressed and motor 3 stops.

In this case, even if the electric circuit of the motor 3 is turned off by the operation of the limit switch 17, there is inertia winding of the drum 2, but since the detection plate 12 is supported by four coil springs 14, this inertia winding It is possible to buffer the impact caused by the collision between the hook 5 and the hook 5.

Further, since the horizontal roller 8 can be displaced along the guide groove 7 together with the detection plate 12 depending on the direction in which the wire rope 4 is wound, the stopper 6 of the hook 5 can be moved even if the wire rope 4 is pulled in from any direction. As described above, the detection plate 12 can stop the receiving.

Note that each of the guide grooves 7 is formed in an arc shape centered on the connection point between the rod 15 and the switch arm 16, that is, the roller 8 and the detection plate 12 are formed in an arc shape centered on the connection point between the rod 15 and the switch arm 16. It performs a circular arc motion.

As described above, this invention is based on the idea that when a wire rope is wound onto a drum and stored in a non-traction state using an electric winch, when the hook at the end of the rope reaches the final winding position, the motor driving the drum In addition to stopping the wire rope, it is possible to prevent the wire rope from being further entangled.

This can prevent problems such as the wire rope becoming wedged, twisted, or cut due to excessive winding of the wire rope.

In particular, this device supports a detection plate that receives the hook at the end of the wire rope by a guide shaft that extends from the main shaft of a pair of rollers that guide the winding of the wire rope behind the detection plate. Since the shaft of the roller is elastically supported so that it can move along guide grooves formed on both side plates of the frame, both rollers are displaced together with the detection plate depending on the direction in which the wire rope is wound. Even if the wire rope is pulled in from any direction, the hook at the end of the wire rope can be properly received and the drive of the drum can be stopped as described above.

[Brief explanation of the drawing]

The drawings show an actual case of this invention; FIG. 1 is a partially cutaway front view of the main parts of a vehicle-mounted electric winch, and FIG. 2 is a side view seen from the left side of FIG. 1. 2...Drum, 3...Motor, 4...
...Wire loaf, 5...Hook, 6...
...Stopper, 8--Horizontal roller, 10...
...Spring, 11...Guide shaft,
12...Detection plate, 14...Coil spring, 15...Rod, 16...Arm, 17...Limit switch

Claims (1)

[Scope of utility model registration request] A pair of upper and lower rollers is placed in front of the drum driven by a motor, which pinches and guides the wire rope wound by this drum from above and below, and a guide shaft extends forward from the shafts of these rollers. A detection plate into which the wire rope is inserted and which has a shape capable of receiving and receiving a hook at the end of the wire rope is made elastic so as to buffer the impact force of the hook when the wire rope is finally wound up by the drum. The front end of a rod extending rearward from both rollers is connected to this detection plate, and the rear end of this rod is connected to the rod when the detection plate moves backward. The shafts of both rollers are connected to a switch arm which acts on a limit switch in the electric circuit in order to stop said motor by the movement of said rod, and the shafts of said rollers are connected to said rod and said switch arm with respect to both side plates of the frame. It can be moved along a guide groove formed in an arc shape centered on a point.
An electric winch characterized in that both rollers are always supported with a spring force applied in a direction in which they approach each other.