JP2007031126A - Guide pulley - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guide pulley structured so that a cable comes off the guide pulley automatically when the prescribed position of the cable drawn about by the guide pulley is drawn nearer to the guide pulley and approaches it. <P>SOLUTION: The guide pulley 4 is equipped with a pulley body 4, pulley supports 4c and 4d to support the pulley body with a pair of supporting shafts 6a and 6b, an abutting member 10 installed on the cable W, and a supporting shaft releasing member to abut to the member 10 in compliance with drawing-nearer of the cable, move, and draw one of a pair of supporting shafts from a pulley shaft support, and when the abutting member to stipulate the prescribed position of the cable is drawn nearer to the guide pulley 2 to result in abutting to the supporting shaft releasing member 12, one supporting shaft is drawn out of the pulley shaft support, and the pulley body is made swingable with respect to the pulley supports by the other supporting shaft, which allows the cable to come off automatically from the guide pulley. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a guide pulley that guides the operation of a rope such as a wire, and more particularly to a guide pulley that can be easily pulled and unloaded.

The typical lumbering work in forestry is accomplished by hanging a wire that is a steel rope over the lumber to be gathered, winding the wire with a winch of a lumber or a lumber, and pulling the lumber to the lumbering location. The The wire that pulls the wood is routed with its direction changed by a guide pulley arranged appropriately so that it can be smoothly operated according to the distance of gathering, unevenness of terrain, presence or absence of obstacles, etc. For example, see Patent Document 1).

This will be further described with reference to FIG. 8 showing a typical example of the wire operation and FIG. 9 showing a guide pulley. In FIG. 8, two guide pulleys G are attached to the standing trees T and T at positions X and Y, respectively.

The wire tied to the wood M to be gathered is hooked on the hook F at the tip of the wire W extending from the winch through the guide pulley G at the position Y and the position X, and the wire W is wound up by the winch, whereby the wood M Is first drawn toward the guide pulley G at position X.

In a typical guide pulley 30 shown in FIG. 9, a rotary pulley 30a is rotatably mounted between a pair of side plates 30c and 30c via a pulley shaft 30b, and the side plates 30c and 30c straddle the rotary pulley 30a. The ends of the U-shaped hook 30d are attached by detachable connecting pins 30e and 30e, respectively. The U-shaped hook 30d is attached to the standing tree T with a wire. The U-shaped hook 30d also prevents the wire W from being detached from the guide pulley 30.
Japanese Patent Laying-Open No. 2004-99225 (FIG. 7)

However, the conventional guide pulley of the form as described above has the following problems to be solved.

That is, when the wire W is wound up by the winch and the wood M on which the wire W is hung is drawn to the gathering place, the operator stops the winding of the wire W by the winch when the wood M reaches the position X of the first guide pulley 30. Then, the wire W is removed from the guide pulley 30 so that the hook F and the wood M can pass through the position X.

To remove the wire W from the guide pulley 30, the operator goes to the place where the guide pulley 30 is installed, and the U-shaped hook 30 d of the guide pulley 30 is removed from the side plate 30 c by removing the connecting pin 30 e. The same operation is performed on the guide pulley 30 at the next position Y.

Since the work of removing the wire W from the guide pulley 30 stops the winding of the wire W by the winch and temporarily stops the pulling of the wood M, and for the operator, the work is performed in a place with a poor footing such as in the mountains. When the wood M is on a slope, a slope or the like, the pulling force is applied to the guide pulley 30 by the wire W, and the wire W is heavy, so it takes a lot of time to remove the wire W from the guide pulley 30. Workers are required to ensure sufficient safety, which is a major obstacle to the gathering work.

The present invention has been made in view of the above fact, and the technical problem thereof is that when the predetermined position of the cord routed by the guide pulley is drawn to and approaches the guide pulley, the cord is automatically detached from the guide pulley. It is to provide a guide pulley.

According to the present invention, as a guide pulley that guides the operation of the cable that solves the above technical problem, a pulley body with a pulley shaft support attached to each end of the pulley shaft that supports the rotating pulley, and the pulley body, A pulley support for inserting and supporting a pair of support shafts extending in parallel with each of the pulley shaft supports in a detachable manner, an abutting member attached to the cable on the side to be drawn toward the pulley body, and a cable of the pulley support Abutting with the approaching abutting member provided on both sides in the direction of operation, and moving with the abutting member according to the pulling of the rope, one of the pair of supporting shafts inserted into the pulley shaft support by this movement is connected to the pulley shaft. And a support shaft releasing body that is pulled out from the support body and releases insertion, and is rotated by pulling out one support shaft from the pulley shaft support body and allowing the pulley body to swing with respect to the pulley support body by the other support shaft. Leave the cord from Thereby, guiding pulleys are provided, characterized in that.

Preferably, the pair of sliding shafts are arranged such that the support shaft releasing body is slidably passed through the pulley support body in parallel with the pair of support shafts and positioned radially outward of the rotating pulley with respect to the support shaft. One of the pair of sliding shafts is provided with a contacted member that protrudes a predetermined length on one side of the pulley support body in the cable running direction and contacts the contact member at the tip, and the other end supports the pair The shaft is integrally connected to one shaft end, and the other of the pair of sliding shafts protrudes a predetermined length on the other side of the pulley support body in the cable running direction and contacts the contact member at the tip. A member is provided, and the other end is integrally connected to the other shaft end of the pair of support shafts. The sliding shaft and the support shaft are integrally connected by a connecting member, and the protruding length of the sliding shaft is defined when the connecting member contacts the pulley support.

The urging means elastically urges the sliding shaft toward the end side provided with the contacted member from the pulley support side, and the urging means is a compression member fitted to the sliding shaft. A coil spring is provided.

Furthermore, the abutted member includes a U-shaped cross-sectional groove that straddles the cord. The abutting member is integrally formed with a hook attached to the end of the cord.

According to the guide pulley configured in accordance with the present invention, the pulley body, the pulley support that supports the pulley body with a pair of support shafts, the contact member that is attached to the cable, and the contact member that contacts the cable according to the pulling of the cable. A support shaft releasing body that moves in contact with each other and extracts one of the pair of support shafts from the pulley shaft support body is provided. Therefore, when the abutting member that defines the predetermined position of the cord is pulled toward and abuts on the guide pulley, one support shaft is extracted from the pulley shaft support body, and the pulley body swings with respect to the pulley support body by the other support shaft. The cable is automatically removed from the guide pulley.

The guide pulley constructed in accordance with the present invention will now be described in more detail with reference to the accompanying drawings illustrating preferred embodiments.

A description will be given with reference to FIG. 1 which is a side view of a guide pulley denoted as a whole by reference numeral 2 and FIG. The guide pulley 2 includes a pulley body 4 on which a wire W, which is a steel cable as a rope, is hung, a pulley support body 8 that supports the pulley body 4 by a pair of support shafts 6a and 6b, and a pulley in a wire operation direction indicated by an arrow Z. The abutting member 10 attached to the wire W on the side to be drawn toward the main body 4 and the abutting abutting member 10 are brought into contact with each other and moved together with the abutting member 10 in accordance with the drawing of the wire W. A support shaft releasing body 12 for removing one of the pair of support shafts 6a and 6b inserted into the support body 4 from the pulley shaft support body 8 is provided.

The support shaft releasing body 12 is installed on both sides of the pulley support 8 in the wire operation direction Z, and is configured to function even when the operation direction of the wire W is reversed. In the reverse case, the contact member 10 is attached to the reverse wire W, and the other support shaft 6b of the support shafts 6a and 6b is removed from the pulley shaft support 8 to release the insertion.

A description will be given with reference to FIG. 7 which is an operation explanatory view of the guide pulley 2 described later together with FIGS. The pulley body 4 includes a rotary pulley 4a, a pulley shaft 4b that supports the rotary pulley 4a via a rolling bearing, and pulley shaft supports 4c and 4d attached to both ends of the pulley shaft 4b.

The pulley shaft 4b is formed in a bolt shape having a flange at one end, and the pulley support 4c, the rotating pulley 4a, and the pulley support 4d are inserted through the pulley shaft 4b, and these are attached by a nut 4e attached to the tip.

The pulley supports 4c and 4d are substantially the same. The pulley support 4c (4d) has a rectangular parallelepiped shape integrally attached to a position radially outward from the installation position of the pulley shaft 4b of the support plate 4f and the rectangular support plate 4f through which the pulley shaft 4b is inserted. The support block 4g is provided. The support block 4g is formed with a through hole 7a (7b) extending in the wire operation direction Z and through which the support shaft 6a (6b) is inserted.

The pulley support 8 is integrally attached to a rectangular parallelepiped support body 8b having a groove 8a (FIG. 7) straddling a part of the periphery of the rotating pulley 4a, and the back side outer surface of the groove 8a of the support body 8b. In addition, a mounting plate 8d having a mounting hole 8c is provided. The attachment plate 8d is used when the guide pulley 2 is attached to a standing tree or the like using a wire, a shackle or the like.

The description will be continued with reference to FIGS. 3 and 4 together with FIGS. Recesses 8g for receiving the support blocks 4g of the pulley supports 4c and 4d are formed in the side portions 8e and 8f on both sides of the groove 8a of the support body 8b. Each of the side portions 8e and 8f is provided with a through hole 9a (9b) formed on the same center line as the through hole 7a (7b) of the support block 4g received in the recess 8g.

A pair of through-holes 9a including the through-holes 7a and through-holes 9b including the through-holes 7b are disposed substantially parallel to each other, and the pair of support shafts 6a and 6b are respectively inserted into the pulley support body 8 and the pulleys are supported by the pulley support body 8. The main body 4 is supported.

Referring mainly to FIG. 1, the contact member 10 is integrally formed in a disk shape on the side of the guide pulley 8 of a known hook 14 that is attached to the end of the wire W and is used to hang an object to be pulled. Has been attached.

Next, the support shaft releasing body 12 will be described with reference to FIGS. The support shaft releasing body 12 includes a pair of slide shafts 16a and 16b that are slidably disposed in the pulley support body 8 in parallel with the pair of support shafts 6a and 6b. On the other hand, it is provided radially outward of the rotating pulley 4a.

One sliding shaft 16a of the pair of sliding shafts 16a and 16b is formed from the pulley support 8 on the one side of the pulley support 8 in the wire operating direction Z and on the side where the wire Z approaches (the right side in FIGS. 1 and 3). A contacted member 18 that protrudes a predetermined length L and contacts the contact member 10 at the tip is provided, and the other end (the left end in FIG. 3) is the axis of one of the support shafts 6a and 6b. It is integrally connected to the end by a connecting plate 20.

The sliding shaft 16b protrudes a predetermined length L on the other side of the pulley support 8 in the wire travel direction Z and on the side where the wire Z is separated (left side in FIGS. 1 and 4), and the contacted member 18 is placed at the tip. The other end (the right end in FIG. 4) is integrally connected to the shaft end of the other support shaft 6b by a connecting plate 20.

The connecting plate 20 will be described mainly with reference to FIG. 5. The connecting plate 20 has a belt-like connecting portion 20 a in which the ends of the sliding shaft 16 a (16 b) and the support shaft 6 a (6 b) are joined, and the other sliding shaft 16 b ( 16a) and a connecting portion 20c having substantially the same size as the connecting portion 20a having the insertion hole 20b of the sliding shaft 16b (16a) at the position where the support shaft 6b (6a) is disposed; A connecting portion 20d that connects the connecting portion 20c on the sliding shaft side is provided.

The connecting plate 20 defines the protruding length L of the sliding shaft 16a (16b) connected to the contact plate 20 by contacting the end surface of the pulley support 8.

The contacted member 18 is formed with a U-shaped cross-sectional groove 18a (FIG. 2) straddling the wire W by a plate material, and is integrally joined to the ends of the sliding shafts 16a and 16b.

The sliding shafts 16a and 16b are urged toward the abutting member 18 between the abutting member 18 and the connecting plate 20 at the protruding portions of the length L of the sliding shafts 16a and 16b. A compression coil spring 22 fitted on each of the sliding shafts 16a and 16b as urging means is provided.

The operation of the guide pulley 2 described above will be described with reference to FIGS.

First, a description will be given with reference to FIG. 8 showing a typical example of the wire operation mode in the gathering work. Two guide pulleys 2 as guide pulleys G are attached to the standing trees T and T at positions X and Y, respectively. The wire M tied to the wood M to be collected is hooked on the hook F at the tip of the wire W extending from the winch through the guide pulley 2 at the position Y and the position X, and the wire M is wound by the winch so that the wood M First, it is drawn toward the position X.

The operation of the guide pulley 2 will be described with reference to FIGS. FIG. 6 shows a state in which the wire W is drawn from one side of the wire operation direction Z (the right side in FIG. 6).

As shown in FIG. 6, the abutting member 10 attached to the hook 14 while the wire W is attracted in the operation direction Z abuts on the abutted member 18 of the support shaft release body 12, and the wire W is attracted in the operation direction Z. Accordingly, when the sliding shaft 16a is pushed against the urging force of the compression coil spring 22 by the contact member 10 toward the pulley support body 8, the support shaft 6a connected to the sliding shaft 16a is supported by the pulley shaft. It is extracted from the support block 4g of the body 4c.

In this way, as shown in FIG. 7, the pulley body 4 is supported by the pulley support 8 so as to be swingable only by the other support shaft 6b, disengages in the direction indicated by the arrow R1, and the wire W is removed from the rotating pulley 4a. It comes off automatically.

When the operation direction Z of the wire W is opposite, the other sliding shaft 16b is operated in the same manner by the contact member 20 attached to the wire W on the other side.

In order to hang the disconnected wire W on the guide pulley 2, in the state where the pulley body 4 of the guide pulley 2 is supported by one of the pair of support shafts 6a and 6b (FIG. 7), the wire W is attached to the outer periphery of the rotating pulley 4a. The contacted member 18 that is hooked into the groove and connected to the other of the support shafts 6a and 6b of the support shaft release pair 12 is pushed by hand against the urging means 22 in the direction of the pulley support body 8 and the pulley body 4 Is moved in the direction of the arrow R2, the support block 4g is inserted into the recess 8g of the pulley support 8, the cores of the through holes 9a and 7a are aligned, the hands are released, and the sliding shaft 6a of the through hole 9a is pulled by the force of the urging means 22 Is inserted through the through hole 7a (FIG. 3).

The operation and effect of the guide pulley 2 as described above will be described.

According to the guide pulley 2, when the contact member 10 that defines a predetermined position of the wire W routed by the guide pulley 2 is attracted to and approaches the guide pulley 2, one support shaft 6 a (6 b) is connected to the pulley shaft support body. The pulley main body 4 is extracted from 8 and can swing with respect to the pulley support 8 by the other support shaft 6b (6a), and the wire W is automatically detached from the guide pulley 4a.

Therefore, the work of removing the wire W from the guide pulley 2 does not stop the winding of the wire W by the winch, and temporarily stops the pulling of the wood M, and the operator does not access the guide pulley 2 in a poor place such as a mountain. In addition, even when the wood M is on a slope, a slope, or the like, and the wire W pulls the guide pulley 2, the wire W can be automatically detached from the guide pulley 2 in accordance with the operation of the wire. The worker can easily collect the materials in a sufficiently safe place.

Since the support shaft releasing body 12 is integrally provided with the sliding shaft 16a (16b) and the support shaft 6a (6b), the support shaft can be reliably released and is robust.

A compression coil spring 22 is provided as an urging means for elastically urging the sliding shaft 16a (16b) toward the end provided with the contacted member 18, and the sliding shaft 16a (16b) and the supporting shaft 6a are provided. By bringing the connecting plate 20 for connecting (6b) into contact with the pulley support 8, the protruding length L of the sliding shaft 16a (16b) and the support block 4g of the pulley main body 4 of the supporting shaft 6a (6b) are provided. The insertion length is reliably defined and maintained.

Since the contacted member 18 includes a U-shaped cross-sectional groove 18a straddling the wire W and is positioned around the wire Z, the contacted member 18 reliably contacts the contact member 10 attached to the wire W.

By forming the contact member 10 integrally with the hook 14 attached to the end of the wire W, the contact member 10 can be easily provided.

And it is also easy to hook the wire W in the disconnected state on the guide pulley 2.

The present invention has been described in detail based on the embodiments. However, the present invention is not limited to the above-described embodiments, and various modifications or corrections can be made within the scope of the present invention, for example, as described below. Is.

In the present embodiment, a wire Z that is a steel cable is used as a cable hung on the guide pulley 2, but the cable is not limited to the wire Z, and may be a cable such as a woven rope.

In this embodiment, the abutting member 10 is formed in a disc shape, and the abutted member 18 is formed in a shape having a U-shaped cross-sectional groove. Depending on the type of towing work of the towed object, etc., it may be appropriately changed so as to ensure contact.

In the present embodiment, the contact member 10 is integrally formed with the hook 14, but may be attached to the outer peripheral portion of the wire Z with a clip or the like, for example.

1 is a side view of a guide pulley constructed in accordance with the present invention. The front view which looked at the guide pulley of FIG. 1 in the AA arrow direction. The partial expanded sectional view which looked at the guide pulley of FIG. 2 in the BB arrow direction. The partial expanded sectional view which looked at the guide pulley of FIG. 2 in CC arrow direction. The front view of the connection member seen in the arrow D direction of FIG. Operation | movement explanatory drawing of the guide pulley shown in FIG. Operation explanatory diagram of the guide pulley shown in FIG. Explanatory drawing which showed the typical example of the wire operation form in the material collection operation | work using a guide pulley. The (a) side view and (b) front view of the conventional guide pulley.

Explanation of symbols

2: guide pulley 4: pulley body 4a: rotating pulley 4b: pulley shaft 4c: pulley shaft support 4d: pulley shaft support 6a: support shaft 6b: support shaft 8: pulley support 10: contact member 12: support shaft Release body 22: compression coil spring (biasing means)
W: Wire
Z: Wire operation direction

Claims (7)

A pulley that guides the operation of the rope,
A pulley body with pulley shaft supports attached to both ends of the pulley shaft supporting the rotating pulley;
A pulley support that supports the pulley body through a pair of support shafts extending in parallel with each pulley shaft support so as to be detachable.
An abutting member attached to the rope on the side that is drawn toward the pulley body;
A pair of support shafts, which are provided on both sides of the pulley support body in the direction of cable operation, come into contact with the approaching contact member and move with the contact member in response to the pulling of the rope. A support shaft releasing body for removing one of the pulley shaft support body and releasing the insertion,
Pull out the cable from the rotating pulley by pulling out one support shaft from the pulley shaft support and making the pulley body swingable with respect to the pulley support by the other support shaft.
Guide pulley characterized by that. The support shaft release body
The pulley support is provided with a pair of sliding shafts arranged in parallel with the pair of support shafts and slidably penetratingly disposed on the outer side of the rotary pulley with respect to the support shaft,
One of the pair of sliding shafts is provided with a contacted member protruding a predetermined length on one side of the pulley support body in the cable running direction and contacting the contact member at the tip, and the other end is one of the pair of supporting shafts Integrally connected to the shaft end of
The other of the pair of sliding shafts includes a contacted member that protrudes a predetermined length on the other side of the pulley support body in the cable running direction and contacts the contact member at the tip, and the other end is the other of the pair of support shafts Integrally connected to the shaft end of
The guide pulley according to claim 1. The sliding shaft and the support shaft are integrally connected by the connecting member,
The protruding length of the sliding shaft is defined by the connecting member coming into contact with the pulley support.
The guide pulley according to claim 2. Urging means for urging the sliding shaft elastically from the side of the pulley support toward the end side provided with the contacted member;
The guide pulley according to claim 2 or 3, wherein The biasing means includes a compression coil spring fitted on the sliding shaft.
The guide pulley according to claim 4. The abutted member has a U-shaped cross-sectional groove straddling the cord,
The guide pulley according to claim 2. The contact member is formed integrally with a hook attached to the end of the cord,
The guide pulley according to any one of claims 1 to 6, characterized in that:

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