JPH041171Y2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a support device for a guide roller in a winch that can fit and guide a wire wound around a rotationally driven drum with good directionality.

(B) Prior Art In a conventional support device for a guide roller in a winch, a mounting bracket that pivotally supports the guide roller is pivotally supported via a pivot shaft that is rotatable in a direction perpendicular to the guide roller. In other words, the guide roller is supported so as to be rotatable left and right about the pivot shaft (see, for example, Japanese Utility Model Application No. 59-88063). (c) Problems to be solved by the invention Guide in conventional winches In the case of a roller support device, the towed object is displaced to the left or right from the extension line connecting the drum and the guide roller, and the wire in front of the guide roller is connected to the drum and the guide roller at the guide roller position. When the wire deviates from the extension line connecting the wire, which is called horizontal pulling, the guide roller rotates to the left or right and guides the wire so that it does not come off from the circumferential fitting groove formed on the outer periphery of the guide roller. However, the relationship between the circumferential fitting groove formed on the outer periphery of the guide roller and the rotation axis is not considered, and as the guide roller rotates from side to side, the circumferential fitting groove on the outer periphery The wire deviates from the imaginary extension line connecting the drum and the guide roller, and the wire comes off from the fitting circumferential groove of the guide roller.The wire that comes off the guide roller is forcibly wound around the drum, so the wire cannot be attached to the drum. There were problems such as damage to the wire and fittings due to sliding while being pressed against the metal fittings.

(d) Means for solving the problem In order to achieve the above object, the guide roller support device for the winch of the present invention has the following features:
It has a drum 5 around which a rotationally driven wire 11 is wound, and a guide roller 9 which is pivotally supported by a mounting bracket 8 fixed in front of the drum 5 and which fits and guides the wire 11. In a winch in which a protruding shaft 7 is attached so as to be rotatable left and right around an axis S of the protruding shaft 7, the position of the axial center S of the protruding shaft 7 and the horizontal support shaft 15 of the guide roller 9 is displaced, and the wire of the guide roller 9 is Mating contact A for 11
is located near the axis S, and a virtual center line B in the width direction of the guide roller 9 rotates around the axis S.

Further, the fitting contact point A between the wire 11 and the guide roller 9 is aligned with the rotation axis S line of the mounting bracket 8.

(E) Function In the guide roller support device for the winch configured as described above, the guide roller 9
Even if the wire 11 that is fitted and guided and wound around the drum 5 moves in the left-right direction in the front where it is fitted and guided by this guide roller 9, the guide roller 9 will not move the wire around the axis S. 11
The wire 1 of the guide roller 9 that rotates left and right follows the movement of the guide roller 9 in the left and right direction, and guides the wire 11 toward the drum 5 side.
Since the fitting contact point A for 1 is located near the axis S, the fitting contact point A will not shift significantly from side to side, the wire 11 will not come off from the guide roller 9, and the fitting contact point By aligning A with the axis S, the wire 11 is prevented from coming off the guide roller 9.

(F) Embodiment To explain an embodiment with reference to the drawings, the general structure of the portable winch shown in FIG. further, toward the front from the upper end position of the winch main body 1,
A guide bar 6 protrudes, and a guide roller 9 is disposed at the front end of the guide bar 6 via a protruding shaft 7 and a mounting bracket 8.

The power of the engine 3 is appropriately decelerated within the drive case 4 and is configured to be transmitted to the drum 5 through a chain 10, and the drum 5 is rotationally driven by this transmitted power.

As the drum 5 rotates, the wire 11 is wound around the drum 5. The wire 11 is wound around the drum 5 so that the wire 11 can be wound smoothly without being wound around the drum 5. The wire 11 is fitted and guided by a guide roller 9 provided in front of the wire 11.

The rotational speed of the engine 3 is controlled via an accelerator wire 12, and the clutch mechanism in the drive case 4, which is capable of intermittent power, is connected to a remote control operation unit 14 via a clutch wire 13.
It is configured to be operated by remote control.

The guide roller 9 is a so-called grooved wheel having a circumferential fitting groove 9a formed on its outer circumferential surface, and its specific support device is constructed as follows.

That is, a protruding shaft 7 is protruded diagonally forward and downward from the front end of the guide bar 6, and a cylindrical body 8a, which is the base side of the mounting bracket 8, is attached to the protruding shaft 7 so as to be rotatable left and right about the axis S. The support arms 8 are fitted together, and the support arms 8
b, 8b are extended symmetrically as a pair, and this guide roller 9 is pivotally supported via a horizontal support shaft 15 between the front ends of both support arms 8b, 8b.

Then, the positional relationship between the axial center S of the protruding shaft 7 and the horizontal support shaft 15 of the guide roller 9 is vertically displaced and separated, and the fitting contact point A at the substantially uppermost end of the guide roller 9 with respect to the wire 11 is aligned with the axial center. It is located near S.

Note that the guide roller 9 is arranged so that the virtual center line B in the width direction rotates about the axis S.

Therefore, the guide roller 9 fits into this fitting circumferential groove 9a.
Then, the wire 11 is guided to fit and wound around the drum 5, and during this guide to fit, it is rotated around the horizontal support shaft 15, and furthermore, the wire 11 before being guided to fit is rotated from side to side. Even if the protruding shaft 7 moves to the right, this fitted guide state is ensured, and the protruding shaft 7 rotates in the left-right direction around the axis S and follows the protruding shaft 7 (see FIG. 2).

Moreover, even when the guide roller 9 follows left and right, the fitting contact point A of the guide roller 9 with respect to the wire 11 does not change significantly.
The wire 11 does not come off from the guide roller 9.

Further, the wire 11 is fitted and guided at a fitting contact point A position at the substantially uppermost end of the fitting circumferential groove 9a of the guide roller 9 rotating around the horizontal support shaft 15, and at the time of this fitting guide, the wire 11 protrudes. It is configured so that it is wound around the drum 5 through between both support arms 8b, 8b without interfering with the shaft 7 or the cylindrical body 8a, and the fitting contact A is connected to the protruding shaft. 7
By aligning the axis S with the axis S, the amount of left and right rotation of the fitting contact point A of the guide roller 9 following the left and right movement of the wire 11 is small, and the fit contact point A of the guide roller 9 is more , wire 11
Preventing the device from coming off is more effective.

In the drawing, 16 is a drum shaft that supports the drum 5, 17 is a support member that supports the drum shaft 16 and fixes the rear end of the guide bar 6 to its upper end, and 18 is a support member that supports the guide bar 6. A connecting hook 19 pivotally supported at the rear end is a connecting rope that connects the connecting hook 18 to a standing tree, tree stump, etc. at the rear of the aircraft.

The winch main body 1 configured as described above connects the connecting hook 18 and a standing tree, etc. at the rear of the machine body with the connecting rope 19, and connects the wire 11 drawn forward from the drum 5 via the guide roller 9 to the wood, etc. When the engine 3 is started and the wire 11 is wound around the drum 5 via the guide roller 9, the wire 11 eventually becomes tense and pulls the towed object for winch work. will be held.

During this winching operation, if the towed object shifts to the left or right from the position directly in front of the aircraft, the wire 11 in front of the guide roller 9 will move to the three points to the left of the solid line position in Fig. 2. The wire 11 shifts to the chain line position or the two-dot chain line position to the right, and at the same time, the wire 11 is fitted and guided by the fitting circumferential groove 9a of the guide roller 9 and protrudes by following the movement of the wire 11 to the left or right. The shaft 7 is rotated to the left or right around the axis S, and the fitting contact point A between the guide roller 9 and the wire 11, which rotates left and right, is rotated left and right at a position near or coincident with the axis S. The fitting contact point A does not deviate much from the axis S.

(g) Effects of the invention Since the present invention is configured as explained above, it produces the effects described below.

1 Even if the front wire 11 fitted to the guide roller 9 moves in the left-right direction, the guide roller 9
Since the wire 11 can be rotated left and right around the axis S of the protruding shaft 7 to follow it, the wire 11 is prevented from coming off the guide roller 9.

2. The horizontal support shaft 15 of the guide roller 9 is displaced from the axis S, and the guide roller 9 and the wire 1
Since the fitting contact point A with 1 is located near the axis S, even if the guide roller 9 rotates left and right,
The mating contact point A does not shift significantly from side to side,
The effect of preventing the wire 11 from coming off the guide roller 9 is increased.

3 By aligning the fitting contact A between the guide roller 9 and the wire 11 on the line of the axis S, even if the guide roller 9 rotates left and right, the fitting contact A
There is no left-right displacement of the wire 11, and the effect of preventing the wire 11 from coming off the guide roller 9 is further increased.

[Brief explanation of drawings]

Figure 1 is a side view of the winch implementing the present invention.
FIG. 2 is a front view of the main parts. 5...Drum, 7...Protruding shaft, 8...Mounting bracket,
9...Guide roller, 11...Wire, 15...
...Horizontal support shaft, S... Axial center, A... Fitting contact, B...
virtual centerline.

Claims (1)

[Claims for Utility Model Registration] 1. A drum 5 that is rotationally driven and winds the wire 11, and a guide roller 9 that is pivotally supported by a mounting bracket 8 fixed in front of the drum 5 and that fits and guides the wire 11. and in which the mounting bracket 8 is attached so as to be rotatable left and right about the axis S of the protruding shaft 7,
and the horizontal support shaft 15 of the guide roller 9 are displaced to position the fitting contact A of the guide roller 9 to the wire 11 in the vicinity of the axis S,
A support device for a guide roller in a winch, characterized in that a virtual center line B in the width direction of the guide roller 9 rotates around an axis S. 2. The guide roller in the winch according to claim 1, wherein the fitting contact point A of the wire 11 and the guide roller 9 is aligned with the axis S line of the mounting bracket 8. Support device.