JP2000351581A - Backhoe working machine with winch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the winding failure by providing guide rollers on the base end side and tip side of a backhoe working machine, successively guiding and drawing out a wire unwound from a winch by the base end-side guide roller and the tip-side guide roller. SOLUTION: A winch 21 is installed to the middle part on the front side above the bent part of a boom 6, and a lower guide roller 22 and an upper guide roller 23 are provided on the base end side and tip side of the boom 6 on the same surface side as the side for installing the winch 21. The winch 21 comprises a drive motor in a winding drum 21a, and the winding and unwinding of a wire W are performed by the drive motor. The lower guide 22 is supported on the cylinder support part 12 of a boom bracket 12 in such a manner as to be vertically rotatable, and the upper guide roller 23 is mounted on the tip of the boom 6 in such a manner as to be longitudinally and laterally rotatable. According to this, the winding failure of the wire W can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a backhoe working machine mounted on a turning work vehicle or the like, and more particularly, to a backhoe working machine having a winch mounted on a boom.

[0002]

2. Description of the Related Art Conventionally, a backhoe working machine mounted on a turning work vehicle or the like has, for example, an arm rotatably attached to a tip end of a boom and a work attachment attached to the tip end of the arm. I have. When the backhoe working machine mounted on the turning work vehicle in this way is used for, for example, forestry work, a grapple is attached as the work attachment, and a side surface of the arm tip,
A winch, a driving device for the winch, and a guide roller for guiding a wire fed from the winch are attached to a part of the backhoe working machine, so that the work of moving the cut down timber or the like or the work of pulling it is performed. In the case of a large turning work vehicle, a winch is installed on the main body of the turning work vehicle, and a guide roller is attached to the tip of the boom.

FIG. 10 shows an example of a conventional turning work vehicle in which a grapple is attached as a work attachment for a backhoe working machine and a winch is mounted in the middle of a boom.
Shown in In the turning work vehicle 101, the backhoe working machine 102 includes a boom 111 rotatably attached to a front end of the turning work vehicle 101, an arm 112 rotatably attached to a tip end of the boom 111, and The boom 111 is constituted by a grapple 113 attached to the distal end of the arm 112, and a winch 121 is mounted in the middle of the boom 111. Further, a guide roller 122 is provided at the tip of the boom 111. When the towing work is performed by the winch 121, the wire 123 extending from the winch 121 is guided by the guide rollers 122 and drawn forward to perform the work.

[0004]

As described above, the wire 123 is moved from the winch 121 through the guide roller 122.
When the wire 123 is wound by the winch 121, the wire 123 is guided by guide rollers 122 as shown in FIG. When the wire 123 is wound at the left and right ends of the winch 121, the inclination angle θ1 of the wire 123 needs to be equal to or less than a predetermined angle.
It is necessary to secure a distance D1 between the guide roller 122 and the guide roller 122 to a certain size or more. Or an alignment device is required.

However, if the turning work vehicle 101 on which the backhoe working machine 102 is mounted is small, there is no space for mounting the backhoe working machine 102, and the boom 111 is mounted on the boom. Since D1 cannot be secured to a large value, the wire 123 may not be wound up neatly but may be irregularly wound, or may be caught or entangled beside the winch winding drum. In particular, when the force applied to the wire 123 fluctuates left and right, the occurrence of poor winding of the wire 123 was remarkable.
Also, since the wire 123 has been drawn forward from the winch 121 toward the guide roller 122, the driver 123 of the turning work vehicle 101 located behind the winch 121 sees how the wire 123 moves relative to the drum. It is difficult to check whether the reeling / unwinding state is correct, and towing work is difficult.

[0006]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, according to claim 1, in a winch-mounted backhoe working machine in which a winch is mounted on an upper portion of a backhoe working machine in which an arm is rotatably attached to a distal end portion of a boom, a base end side and a front end of the backhoe working machine. A guide roller is provided on the side, and the wire fed from the winch is guided and pulled out sequentially by the guide roller on the base end side of the backhoe working machine and the guide roller on the distal end side of the backhoe working machine.

According to a second aspect of the present invention, the guide roller provided on the base end side of the backhoe working machine is attached to a bracket supporting the backhoe working machine via an arm, and the arm can be freely rotated up and down. Configured.

According to a third aspect of the present invention, the arm or the bracket is provided with a stopper for regulating an upper turning position and a lower turning position of the arm.

According to a fourth aspect of the present invention, the guide roller provided on the base end side of the backhoe working machine is connected with two conical small-diameter ends facing each other.
The roller was formed in a roller shape having a smaller diameter from the end to the center.

According to a fifth aspect of the present invention, the winch is disposed on the front side of the upper part of the boom of the backhoe working machine, and the winding and feeding of the wire by the winding drum of the winch is performed from the operation part side of the winding drum. The wires were routed as done.

According to a sixth aspect of the present invention, in a winch-mounted backhoe working machine in which a winch is mounted on an upper part of a backhoe working machine in which an arm is rotatably attached to a tip end of a boom, the winch is wound on a winch winding drum. Is mounted so as to be rotatable in a direction orthogonal to the rotation axis of

According to a seventh aspect of the present invention, there is provided a fixing means for fixing the position of the winch at an arbitrary rotation position.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a turning work vehicle on which a winch-mounted backhoe working machine of the present invention is mounted,
2 is a side view showing the backhoe working machine, FIG. 3 is a side view showing the configuration of the lower guide roller, FIG. 4 is a front view thereof, FIG. 5 is a view showing the inclination angle of the wire wound around the winch, and FIG. FIG. 7 is a front cross-sectional view showing a mounting structure of the winch to the boom, FIG. 7 is a plan view showing a rotating state of the winch with respect to the boom, and FIG. 8 shows the right and left forces acting on the wire when working without the guide roller. FIG. 9 is a plan view showing a state in which a winch is turned in accordance with a tilt angle of a wire, and FIG. 10 is a plan view showing a state in which a winch is rotated in accordance with an inclination angle of a wire. FIG. 11 is a side view showing a turning work vehicle on which a working machine is mounted, and FIG. 11 is a diagram showing an inclination angle of a wire wound around a winch in a conventional backhoe working machine.

First, the structure of a turning work vehicle on which the winch-mounted backhoe working machine of the present invention is mounted will be described.
In FIG. 1, the turning work vehicle supports a revolving unit 2 at the upper center of the crawler type traveling device 1 so as to be able to turn left and right. Arranged freely. Above the revolving superstructure 2, a bonnet 14 for covering an engine and the like is provided, and an operation unit 15 and a seat 16 constituting an operation unit are provided. A canopy is provided above the operation unit 15 and the seat 16. 8 are provided.

A boom bracket 12 is attached to the front end of the swing body 2 so as to be rotatable left and right, and a boom 6 is attached to a support bracket 12a at the upper end of the boom bracket 12.
Is supported so as to be vertically rotatable. The boom 6 is bent forward at an intermediate portion, and is formed in a substantially “C” shape having a bent portion 6 d in a side view. The arm 5 is rotatably supported at the upper end of the boom 6, A grapple 4 as a work attachment is provided at the tip of the arm 5.
Is attached. A backhoe working machine 7 is configured by the boom 6, the arm 5, the grapple 4, and the like.

Next, the configuration of the backhoe working machine 7 will be described. The boom 6 is turned by a boom cylinder 11, the arm 5 is turned by an arm cylinder 10, and the grapple 4 is turned by a grapple cylinder 9. The boom cylinder 11, the arm cylinder 10, and the grapple cylinder 9 are configured as hydraulic cylinders, and each of the cylinders 9, 10, 11 is operated by operating an operation lever provided on the operation operation unit 15. The hydraulic oil is supplied from a hydraulic pump disposed in the hood 4 of the swivel base 2 through a hydraulic hose via a control valve disposed in the rotary table 2, so that the hydraulic pump is driven to expand and contract.

The boom cylinder 11 is interposed between the cylinder support portion 12b of the boom bracket 12 and a boom cylinder bracket 36 provided on the front of the boom 6 in the middle. Between the arm cylinder bottom bracket 31 provided on the arm 5 and the arm cylinder upper cylinder bracket 30 provided on the base end of the arm 5, and the grapple cylinder 9 is connected to the grapple cylinder bracket 29 and the grapple 4 provided on the base end of the arm 5. It is interposed between the connected grapple link 28.

A winch 21 is mounted on the front side of the boom 6 above the bent portion 6a, and a base end of the boom 6 on the same side as the side on which the winch 21 is mounted. The lower guide roller 2
2 and an upper guide roller 23 are provided. The winch 21 incorporates a drive motor integrally with the winding drum 21a, and the drive motor drives the wire W
Winding and unwinding. The lower guide roller 22
The upper guide roller 23 is attached to the front surface of the tip of the boom 6 so as to be able to rotate back and forth and left and right.

The wire W fed out of the winch 21
Is pulled out first and guided by the lower guide roller 22, pulled out of the lower guide roller 22 and guided by the upper guide roller 23, and then pulled out in the direction of the towed object. That is, the wire W from the winch 21 is sequentially guided and pulled out by the lower guide roller 22 on the base end side of the boom 6 and the upper guide roller 23 on the tip end side of the boom 6. The roller 23a of the upper guide roller 23 and the roller 22a of the lower guide roller 22 are configured by, for example, sheaves, which are rollers having grooves for guiding the wire W formed on the outer periphery.

The tension of the wire W acts on the roller 22a of the lower guide roller 22 to which the wire W is guided, in the direction of the upper part of the boom 6 to which the winch 21 and the upper guide roller 23 are attached, as shown in FIG. The roller 22a, which is supported by the cylinder supporting portion 12b via a roller arm 22b so as to be vertically rotatable, rotates vertically following the vertical rotation of the boom 6. Thus, for example, even when the boom 6 rotates downward from the upper rotation position, the lower guide roller 22 and the boom cylinder 11 disposed in front of the boom 6 can maintain a substantially constant interval. Can be prevented from coming into contact with each other.

As shown in FIGS. 3 and 4, the lower end of the boom cylinder 11 is rotatably supported by a support pin 32 in the cylinder support portion 12b of the boom bracket 12. A detent plate 33 is fixed to one end of the support pin 32, and the end of the detent plate 33 is fastened to the boom bracket 12 by a bolt 34, thereby stopping the detent of the support pin 32. . Roller arms 22b, 22b for supporting the rollers 22a of the lower guide roller 22 are rotatably supported at both ends of the support pin 32. The roller arm 22b at one end of the support pin 32 is , Cylinder support 12
It is arranged between b and the detent plate 33.

An upper rotation stopper 37 is fixed to the inner surface of the roller arm 22b disposed between the cylinder support portion 12b and the rotation preventing plate 33, and the roller arm 22b rotates upward to a certain angle. Then, the upper rotation stopper 37 comes into contact with the end surface 12c of the boom bracket 12, and the roller arm 22b is configured not to further rotate upward. Further, a roller arm 22b interposed between the cylinder support portion 12b and the detent plate 33
When the roller arm 22b rotates downward to a certain angle, the roller arm 22b
The front end face 22c of the roller arm 22b is locked to a downward rotation stopper 33a projecting inward from the rotation preventing plate 33 so that the roller arm 22b does not further rotate downward. That is, on the roller arm 22b side, an upper rotation stopper 37 for regulating the upper rotation position of the roller arm 22b.
Is provided on the boom bracket 12 side, and a detent plate 33 for restricting a downward rotation position of the roller arm 22b is provided.
Is provided with a downward rotation stopper 33a.

The maximum upward rotation position of the roller arm 22b regulated by the upper rotation stopper 37 is set at a position where the roller 22a does not contact the boom cylinder 11, and the lower rotation stopper 33a of the rotation preventing plate 33 is set.
Is set so that the roller 22a and the roller arm 22b do not come into contact with the lower portion of the revolving unit 2, the crawler-type traveling device 1, the blade 3 or the like when the revolving unit 2 turns. Position.

As described above, the lower guide roller 22 provided on the base end side of the boom 6 is vertically rotatably attached to the boom bracket 12, and the lower guide roller 22 is provided with the upper rotation stopper 37 and the boom bracket The lower guide roller 2 is provided with the boom cylinder 11, the revolving unit 2, the crawler-type traveling device 1
It is possible to prevent the lower guide roller 22 from being damaged, and to ensure smooth winding and feeding of the wire W.

As described above, the wire W extending from the winch 21 mounted on the upper part of the boom 6 first receives the lower guide roller 2 disposed near the lower end of the boom 6.
2, so as shown in FIG.
A large distance D between the lower guide roller 22 for guiding the wire W and the winch 21 can be secured, and the inclination angle θ of the wire W when the wire 123 is wound at the left and right ends of the winch 21 can be increased. It can be configured to have a small angle equal to or less than a certain angle.

As a result, the winch 21 is mounted on the upper part of the boom 6 of the backhoe working machine 7 mounted on a small turning work vehicle, and the distance between the winch 21 and the upper guide roller 23 provided at the tip of the boom 6 is increased. Even if it is not possible to secure a large
1 can be wound up neatly, and poor winding of the wire W can be prevented. In addition, wire W
Is guided by the lower guide roller 22, which does not rotate left and right, between the upper guide roller 23 and the winch 21 at the tip of the boom 6, the force applied to the wire W moves left and right, and the upper guide roller 23 Even if it turns to the left and right, the winding state of the winch 21 does not change, and it is possible to reliably wind up the winch 21 in a constant state.

Further, as shown in FIG. 4, the roller 22a of the lower guide roller 22 has two conical small-diameter ends facing each other and is connected to each other, and has a smaller diameter from the end to the center. Since it is formed in a roller shape, the wire W guided by the roller 22a is
Roller 22 without swinging left and right during winding and feeding
a The guide is guided at substantially the right and left central portions, so that the winding / unwinding state of the wire W by the winding drum 21a of the winch 21 can be further stabilized.

Further, the winch 21 is arranged on the front side of the upper part of the boom 6 and the winding drum 2 of the winch 21 is disposed.
1a, the winding and feeding of the wire W is performed by the winding drum 21.
Since the wire W is routed and pulled downward so as to be carried out from the rear part of the winding drum 21a, that is, from the driving part side of the winding drum 21a, the winding of the wire W can be performed even from the driving part located behind the winch 21. It is possible to easily check the take-out / feed-out state and to facilitate the towing work. However, the lower guide roller 22 can be attached to the lower part of the boom 6 or the lower front part of the revolving structure 2 via a stay or the like, and the upper guide roller 23 can be provided on the lower surface of the arm 5. However, in a backhoe having a short boom, the winch 21 is disposed between the upper guide roller 23 and the lower guide roller 22, and the wire W is pulled out downward, and the lower guide roller 22 and the upper guide roller 23 are pulled out.
The guide may be guided in this order to increase the distance between the winch 21 and the guide roller.

The winch 21 is mounted on the boom 6 as follows.
To be rotatable in the left-right direction. FIG.
As shown in FIG. 7, a fixed plate 51 is fixed to the boom 6, and the fixed plate 51 has spacers 52.
The support plate 53 is attached via the. A support shaft 55 having a mounting plate 54 fixed to the lower end thereof is rotatably supported by the support plate 53, and the outer frame 21 b that rotatably supports the take-up drum 21 a of the winch 21 is mounted on the mounting plate 54. The winch 21 is attached to the boom 6 so as to be rotatable.

The fixing plate 51, the spacer 52 and the support plate 53 on one side are formed with fixing holes 58 penetrating them vertically.
Are formed with a plurality of positioning bosses 56. Then, the winch 21 is rotated with respect to the boom 6 so that one of the plurality of positioning bosses 56 is aligned with the fixing hole 58, and the fixing pin 57 is inserted into the fixing hole 58 and the positioning boss 56. Thereby, the winch 21 can be fixed in position at a predetermined rotation angle. For example, in the case of this example, the positioning bosses 56 are formed at five places, and the left and right rotation positions can be fixed in five steps within the range of the angle θ2. Incidentally, the fixing step and the rotation range of the left-right rotation position can be arbitrarily set, and the left-right rotation position can be fixed steplessly.

As described above, by configuring the winch 21 to be rotatable left and right, for example, wood or the like is directly pulled by the wire W from the winch 21 without passing through the upper guide roller 23 and the lower guide roller 22. In this case, as shown in FIG.
Even if the force applied to the wire W is shifted in one of the right and left directions and the wire W is pulled at an angle θ3 from the center and pulled, the wire W If the winch 21 is rotated in the same direction as the inclination direction of the wire W as described above in accordance with the inclination angle of W and the winding direction is shifted by the angle θ3, the winding direction of the winch 21 and the pulling direction of the wire W And the wire W can be prevented from being irregularly wound and being wound around the winding drum 21a, so that the wire W can be surely and orderly wound. The wire W is wound on the winding drum 21a.
The wire W can be prevented from being cut by contacting the periphery of the wire W.

Further, since the pivoting position of the winch 21 can be fixed at any position, the winch 21 can be fixed.
By fixing the winch 21 after turning in accordance with the towing direction, the winding state of the wire W can be stabilized, and the wire W can be reliably aligned and wound.

[0033]

As described above, the present invention has the following advantages. That is, as in claim 1,
Guide rollers are provided on the base end side and the tip end side of the backhoe working machine, and the wire fed from the winch is sequentially guided by the guide rollers on the base end side of the backhoe working machine and the guide rollers on the front end side of the backhoe working machine. When the distance between the winch and the guide roller provided at the end of the boom cannot be secured large, it is possible to extend the distance and wind the wire neatly into the winch. Defective winding of the wire can be prevented. Also, since the wire is guided by the guide roller at the base end of the boom, which does not rotate left and right, between the guide roller at the end of the boom and the winch, the force applied to the wire moves left and right, and the tip of the boom moves. Even if the guide roller on the side rotates right and left, the winding state of the winch does not change, and it is possible to reliably wind the reel in a constant state. Thereby, the work efficiency by the winch can be improved.

Further, as set forth in claim 2, the guide roller provided on the base end side of the backhoe working machine is attached via an arm to a bracket supporting the backhoe working machine, and the arm can be freely rotated up and down. Therefore, for example, even when the boom pivots downward from the upper pivot position, the guide roller on the base end side and the boom cylinder disposed in front of the boom maintain a substantially constant interval. Can be prevented from contacting each other. Thus, the guide roller can be prevented from being damaged, and the wire can be smoothly wound and fed, so that the work efficiency by the winch can be improved. Further, the arm can be supported by using a pin for pivotally supporting the bottom of the boom cylinder, so that an increase in the number of parts can be minimized and the configuration can be simplified.

Further, since the arm or the bracket is provided with a stopper for restricting the upper turning position and the lower turning position of the arm, the guide roller on the base end side can be used as a boom cylinder or a swivel. It is possible to prevent contact with the body, the crawler-type traveling device, the blade, and the like, prevent the guide roller from being damaged, and secure smooth winding and feeding of the wire. Thereby, the work efficiency by the winch can be improved.

Further, the guide roller provided on the base end side of the backhoe working machine is connected with two conical small-diameter ends facing each other, and goes from the end to the center. The wire guided by the guide roller is always guided at the substantially right and left central portions of the guide roller without swinging left and right during winding and feeding, The state of winding and unwinding the wire by the winch can be further stabilized. Thereby, the work efficiency by the winch can be improved.

Further, the winch is arranged on the front side of the upper part of the boom of the backhoe working machine,
Since the wire is routed so that the wire is wound and fed by the winding drum from the operation unit side of the winding drum, the wire can be wound and wound even from the operation unit located behind the winch. The feeding state can be easily checked, and the towing work by the winch can be facilitated to improve the work efficiency.

Further, according to a sixth aspect of the present invention, in a winch-mounted backhoe working machine in which a winch is mounted on an upper part of a backhoe working machine in which an arm is rotatably attached to a tip end of a boom, the winch is wound on a winch winding drum. Since it is mounted so that it can rotate in the direction perpendicular to the rotation axis of, for example, when pulling wood or the like directly without a guide roller by a wire from a winch, the force applied to the wire is shifted in one direction to the left or right. Depending on the angle of inclination of the wire,
By rotating the winch in the same direction and shifting the winding direction of the winch by the same angle as the inclination angle of the wire, it is possible to eliminate the deviation between the winding direction of the winch and the pulling direction of the wire. Thus, it is possible to reliably wind the wire in an orderly manner. Further, it is possible to prevent the wire from contacting the peripheral edge of the winding drum and cutting the wire. Thereby, the work efficiency by the winch can be improved.

Further, since the winch is provided with a fixing means capable of fixing the position of the winch at an arbitrary turning position, the winch is fixed after the winch is rotated in the towing direction. Thus, the winding state of the wire can be stabilized, and the wire can be reliably aligned and wound. Thereby, the work efficiency by the winch can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing a turning work vehicle on which a winch-mounted backhoe working machine of the present invention is mounted.

FIG. 2 is a side view showing the backhoe working machine.

FIG. 3 is a side view illustrating a configuration of a lower guide roller.

FIG. 4 is a front view of the same.

FIG. 5 is a diagram showing an inclination angle of a wire wound around a winch.

FIG. 6 is a front sectional view showing a structure for mounting a winch to a boom.

FIG. 7 is a plan view showing a rotating state of the winch with respect to the boom.

FIG. 8 is a plan view showing the winding and unwinding state of the wire by the winch in a state where the force applied to the wire is shifted to the left and right when the work is performed without the intervention of the guide roller.

FIG. 9 is a plan view showing a state in which the winch is rotated according to the inclination angle of the wire.

FIG. 10 is a side view showing a turning work vehicle on which a conventional winch-mounted backhoe working machine is mounted.

FIG. 11 is a view showing an inclination angle of a wire wound around a winch in a conventional backhoe working machine.

[Explanation of symbols]

 W Wire 5 Arm 6 Boom 7 Backhoe Working Machine 12 Boom Bracket 12b Cylinder Support 21 Winch 21a Winding Drum 22 Lower Guide Roller 22a Roller 22b Roller Arm 22c Front End Surface (of Roller Arm) 23 Upper Guide Roller 33 Rotation Stop Plate 33a Lower Rotation stopper 34 Bolt 37 Upper rotation stopper 56 Positioning boss 57 Fixing pin 58 Fixing hole

Claims (7)

[Claims] 1. A winch-mounted backhoe working machine in which a winch is mounted on an upper part of a backhoe working machine having an arm rotatably attached to a distal end of a boom, and guides are provided on a base end side and a tip end side of the backhoe working machine. Rollers are provided,
A winch-mounted backhoe operation wherein the wire fed from the winch is guided and pulled out sequentially by a guide roller at a base end side of the backhoe working machine and a guide roller at a distal end side of the backhoe working machine. Machine. 2. The method according to claim 1, wherein the guide roller provided on the base end side of the backhoe working machine is attached to a bracket supporting the backhoe working machine via an arm, and the arm is configured to be vertically rotatable. The winch-mounted backhoe working machine according to claim 1, wherein 3. The winch-mounted backhoe working machine according to claim 2, wherein the arm or the bracket is provided with a stopper for regulating an upper turning position and a lower turning position of the arm. 4. The guide roller provided on the base end side of the backhoe working machine is connected with two conical small-diameter ends facing each other, and the diameter decreases from the end to the center. The winch-mounted backhoe working machine according to claim 2, wherein the working machine is formed in a roller shape. 5. The winch is arranged on the front side of an upper part of a boom of a backhoe working machine, and the wire is wound and fed by a winding drum of the winch from a driving unit side of the winding drum. The winch mounted backhoe working machine according to claim 1, wherein 6. A winch-mounted backhoe working machine in which a winch is mounted on an upper part of a backhoe working machine having an arm rotatably attached to a tip end of a boom, wherein the winch is orthogonal to a rotation axis of a winch winding drum. A winch mounted backhoe working machine which is mounted so as to be rotatable in a direction. 7. The winch-mounted backhoe working machine according to claim 6, further comprising fixing means for fixing the position of the winch at an arbitrary rotation position.