JP2003239318A - Blade device of sediment transfer machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade device of a sediment transfer machine having a simple constitution, and causing no backward inclination. <P>SOLUTION: An installing part 15 for installing an extension blade 21 is arranged in a lengthwise directional end part of a main blade 10 of this sediment transfer machine. An installing object part 22 detachably installed in the installing part 15 is arranged on the extension blade 21. One installing pin 30 is arranged for making the installing part 15 and the installing object part 22 nonseparable. A rotational movement preventive means 31 is arranged in the installing part 15 and the installing object part 22 for preventing a rotational movement of the installing pin 30 of the extension blade 21. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a blade device for a sediment transport machine.

[0002]

2. Description of the Related Art As a blade device of this type, Japanese Patent Laid-Open No.
The thing described in 0-183673 is known. In this conventional device, an upper revolving structure is capable of horizontally revolving with respect to a lower traveling structure, and in a revolving work vehicle in which a work implement is pivotally attached to the upper revolving structure forward, the left and right directions of blades for soil removal The width of the extension blade is made variable by extending the extension blade to the main blade, and the extension blade is rotatable on the main blade via a pivot shaft, and the extension blade is rotated about the pivot shaft. By the movement, the extension blade can be stored behind the main blade and within the width of the main blade, and when the extension blade is extended, the locking tool is inserted into the extension locking hole, and the extension blade is extended. When the blade is stored, it is configured to insert the locking tool into the storage locking hole, and the storage locking hole and the extension locking hole are provided on the opposite side in plan view with the pivot shaft as the center. Variable width soil removal blur It was de structure.

[0003]

The above-mentioned prior art requires a locking tool in addition to the pivot shaft, so that the pivot shaft hole, the extension locking hole, and the storage locking hole are provided. Requires two holes,
There is a problem that the structure becomes complicated, the number of processing steps increases, and the manufacturing cost increases. Further, in the conventional one, the extension blade and the main blade are designed to be in a straight line in the extended state where the extension blades are attached to both ends of the main blade.

However, with such a straight design,
The extension blade may be inclined rearward of the main blade due to backlash due to part accuracy or aging. If the extension blade is inclined rearward, the function of transporting earth and sand will be deteriorated. Therefore, it is an object of the present invention to provide a blade device for a soil and sand transporting machine, which has a simple structure and prevents rearward inclination.

[0005]

In order to achieve the above object, the present invention takes the following means. That is, the feature of the present invention is that a mounting portion for mounting the extension blade is provided at the longitudinal end portion of the main blade of the earth and sand transporting machine, and the extension blade is detachably mounted to the mounting portion. A mounting portion is provided, and a single mounting pin is provided to make the mounting portion and the mounted portion inseparable, and the mounting portion and the mounted portion are configured to rotate the extension blade around the mounting pin. There is a rotation prevention means for preventing the rotation.

According to the present invention having the above-mentioned structure, the extension blade is attached by one attaching pin, so that the structure is simplified. The mounting portion is provided on a back surface of a longitudinal end portion of the main blade, the mounting portion has upper and lower mounting surfaces, and the mounting surface is provided with mounting holes penetrating vertically.
A protrusion projecting from the mounting surface is provided, the mounted portion is provided on a back surface of the extension blade, and the mounted portion has upper and lower mounted surfaces that are removably engaged with the upper and lower mounting surfaces. And a mounting hole penetrating vertically is provided on the mounting surface, and the mounting portion has an engaging portion that engages with the protrusion in a disengageable manner. It is preferable that the rotation preventing means is provided so that it can be inserted into and removed from the attachment hole and the attachment hole, and that the rotation preventing means includes the protrusion and the engaging portion.

It is preferable that the engaging portions are provided at two front and rear positions through the attached holes, and one of them constitutes a rotation preventing means at the time of extension and the other at the time of storage. In the extended state of the extension blade, it is preferable that the front end of the outer end of the extension blade is located in front of the front end of the main blade. Thus, by arranging the extension blade forward in the initial stage, it is possible to prevent the extension blade from being tilted backward even if the backlash occurs due to use, and to suppress deterioration of the sediment transfer function.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In FIG. 10, a small backhoe 1 is shown as an example of a sediment transport machine. This backhoe 1
Is provided with a blade device 2 according to the present invention. The backhoe 1 has a traveling device 4 including a pair of left and right crawlers 3, and a swivel base 5 is mounted on the traveling device 4. The swivel base 5 is equipped with an excavation work device 6, an engine unit 7, a control seat 8, a control device 9, and the like.

The crawler 3 is adjustable in the left-right distance (vehicle-widthwise interval). The blade device 2 is provided at the front of the traveling device 4. The blade device 2 is a main blade 10 for transferring earth and sand.
And a pair of left and right arms 1 on the back surface of the main blade 10.
1 is provided, and the arm 11 is pivotally supported on the front portion of the traveling device 4 so as to be vertically rotatable. The blade device 2 is operated by a hydraulic cylinder 12 so as to be vertically rotatable. As shown in FIGS. 2 to 4, the main blade 10
Is composed of an arc-shaped plate material that is concavely curved forward. A cylinder connecting portion 13 to which the hydraulic cylinder 12 is attached is provided on the back side (rear side, traveling device side) of the central portion of the main blade 10 in the longitudinal direction (left-right direction). The arms 11 are provided on both left and right sides of the cylinder connecting portion 13. Reinforcing ribs 14 having a triangular shape in plan view are provided between the left and right outer surfaces of the arm 11 and the back surfaces of the left and right ends of the main blade 10.

A mounting portion 15 for mounting an extension blade is provided at the end of the main blade 10 in the longitudinal direction. The mounting portion 15 is provided so as not to project outward in the left-right direction beyond the left and right edges of the main blade 10.
The attachment portion 15 is composed of a back surface of an end portion in the longitudinal direction of the main blade 10 and a pair of upper and lower plate members 16 attached to the upper and lower surfaces of the reinforcing rib 14. The lateral outer end surface of the plate member 16 and the lateral outer end edge of the main blade 10 are flush with each other.

The plate member 16 has upper and lower mounting surfaces 17. The upper and lower mounting surfaces 17 are parallel surfaces that are parallel to each other and are arranged horizontally. The mounting surface 17 is provided with a mounting hole 18 penetrating vertically. This mounting hole 1
On the front side (main blade side) of 8 and this mounting hole 18
On both left and right sides, upper and lower protrusions 19 are provided which protrude in the vertical direction from the upper and lower mounting surfaces 17. This protrusion 1
9 is composed of a plate material having a rectangular shape in plan view.
An abutting portion 20 protruding further upward is provided at an outer end portion in the left-right direction of the upper protruding portion 19.

The blade shown in FIGS. 5-7 is an extension blade 21.
Is. The extension blade 21 is composed of an arc-shaped plate material that is concavely curved forward. This arc shape is the same as that of the main blade 10. The extension blade 21 is provided with an attached portion 22 that is detachably attached to the attaching portion 18. The attached portion 22 is composed of a pair of upper and lower plate members 23 provided on the back surface of the extension blade 21. This plate material 23
Is formed in a J shape in a plan view and extends inward in the left-right direction from the back surface of the extension blade 21.

As shown in FIG. 8, the extension blade 21
When extended to the end of the main blade 10, the attached portion 22 has upper and lower attached surfaces 24 that engage with the upper and lower attaching surfaces 17 of the attaching portion 18 in a disengageable manner. The attached surface 24 is provided with an attached hole 25 which is concentric with the attachment hole 18 and which penetrates vertically. The front and rear end edges of the plate member 23 forming the attached portion 22 via the attached hole 25 are engaging portions 26 and 27 that engage with the protrusion 19 in a disengageable manner. Upper plate member 23 that constitutes the attached portion 22
A bolt mounting piece 28 protruding upward is provided on the upper surface of
The bolt mounting piece 28 is provided with a screw hole 29 penetrating in the left-right direction.

As shown in FIG. 8, the extension blade 21 is attached to the end of the main blade 10 in the longitudinal direction in the extended state of being flush with each other. At this time, the extension blade 21
The mounted surface 24 of the mounted portion 22 of the main blade 10 engages with the mounting surface 17 of the mounting portion 15 of the main blade 10 in the vertical direction, and the mounting hole 1
8 and the mounting hole 25 are concentrically positioned, and both holes 18,
One mounting pin 30 is inserted into 25. At this time, the rear end edge of the protrusion 19 and the engaging portion 26 of the front portion of the attached portion 22 come into contact with each other to form rotation preventing means 31 around the attachment pin 30 of the extension blade 21.

As shown in FIG. 9, the mounting pin 30 has a body portion 32 which is inserted into the mounting hole 18 and the mounting hole 25.
And a U-shaped handle portion 33 provided at the end of the main body portion 32. Screw hole 2 of the bolt mounting piece 28
A bolt 34 is screwed into the shaft 9, and the tip of the bolt 34 abuts the abutting portion 20 and is locked by a lock nut 35. By tightening the bolt 34, the extension blade 21 is prevented from rattling.

The state shown by the phantom line in FIG. 8 is the state in which the extension blade 21 is housed, and at this time, the rear edge of the protrusion 19 and the engaging portion 27 at the rear of the mounted portion 22 make contact and rotate. It constitutes the prevention means 31. In the extended state of the extension blade 21, the one shown in FIG. 1 is configured such that the front end of the outer end of the extension blade 21 is located ahead of the front end of the main blade 10 by a distance a. This is the same as that shown in FIG. The present invention is not limited to what is shown in the above-mentioned embodiment, and for example, the upper and lower mounting surfaces 17 are provided on the lower surface of the upper plate member 16 and the upper surface of the lower plate member 16. It may be.

[0017]

According to the present invention, since the structure is simple, the manufacturing cost is low, and the backward inclination of the extension blade is suppressed, so that the spillage during the earth unloading work is reduced.
Work efficiency will be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a blade device showing an embodiment of the present invention.

FIG. 2 is a side view of a main blade device.

FIG. 3 is a plan view of a main blade device.

FIG. 4 is a view taken along the line AA of FIG.

FIG. 5 is a plan view of an extension blade device.

FIG. 6 is a side view of an extension blade device.

FIG. 7 is a rear view of the extension blade device.

FIG. 8 is a plan view showing a state where an extension blade is connected to a main blade.

FIG. 9 is a front view of a mounting pin.

FIG. 10 is a side view of a backhoe shown as an example of a soil and sand transfer machine equipped with the blade device of the present invention.

[Explanation of symbols]

2 blade device 10 main blade 15 Mounting part 17 Mounting surface 18 mounting holes 19 Projection 21 Extension blade 22 Mounted part 24 Attached surface 25 Attached hole 26 Engagement part 27 Engagement part 30 mounting pins 31 Rotation prevention means

Claims (4)

[Claims] 1. A mounting portion for mounting an extension blade is provided at a longitudinal end portion of a main blade of a sediment transporting machine, and the extension blade is provided with a mounted portion detachably mounted to the mounting portion. A single mounting pin is provided to make the mounting portion and the mounted portion inseparable, and the mounting portion and the mounted portion prevent rotation of the extension blade around the mounting pin. A blade device for a sediment transport machine, wherein the blade device is provided with. 2. The mounting portion is provided on a back surface of a longitudinal end portion of the main blade, the mounting portion has upper and lower mounting surfaces, and the mounting surface is provided with mounting holes penetrating vertically. A protrusion protruding from the attachment surface, the attachment portion provided on the back surface of the extension blade, the attachment portion being a top and bottom attachment surface that is detachably engaged with the top and bottom attachment surfaces. A mounting hole that penetrates vertically is provided on the mounting surface, and the mounting portion has an engaging portion that releasably engages with the protrusion, and the mounting pin includes: The earth and sand transfer machine according to claim 1, wherein the rotation preventing means is provided so as to be freely inserted into and removed from the attachment hole and the attachment hole, and the rotation preventing means is configured by the protrusion and the engaging portion. Blade device. 3. The engagement portion is provided at two positions, front and rear, through the attachment hole, one of which constitutes a rotation preventing means at the time of extension and the other at the time of storage. Claim 2
A blade device of the earth and sand transfer machine described. 4. In the extended state of the extension blade,
The blade device of the earth and sand transfer machine according to claim 2 or 3, wherein a front end of an outer end of the extension blade is configured to be located in front of a front end of the main blade.