JPH0513802Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a ditch digging attachment that is attached to the end of the arm of a shovel-type excavator such as a power shovel or a backhoe.

[Prior art and its problems]

Conventional power shovel technology for excavation work includes a boom mounted on a swivel platform mounted on a crawler so that it can be raised and lowered, an arm connected to the tip of the boom so as to be swingable, and a bucket attached to the tip of the arm. be. Incidentally, in this power shovel, excavation is performed by rotating the bucket cart in the length direction of the arm, so when the swivel table is rotated, the excavation direction of the bucket cart is inclined with respect to the moving direction of the crawler. For this reason, it is extremely difficult to use the power shovel as described above to perform a so-called trench digging operation in which trenches are dug along the sides of the crawler path.

Further, as shown in FIG. 7, a boom mounting base 26 is rotatably connected to a swivel base 21 provided on the crawler 20, a boom 22 is connected to the boom mounting base 26 such that it can be raised and lowered, and the boom 22 is There has also been a power shovel in which an arm 23 is connected to the tip of the arm 23, and a bucket belt 27 is rotatably connected to the tip of the arm 23.

In the above power shovel, the swivel base 21
The rotation of the boom 22 and the rotation of the boom mounting base 26 allow the boom 22 and the arm 23 to be held parallel to the direction of movement of the crawler 20 on the side of the path where the crawler 20 moves. It is possible.

However, in the above-mentioned power shovel, it is necessary to rotatably attach the boom mount 26 to the swivel base 21 and to attach a rotation cylinder for the boom mount 26, which is expensive and difficult to operate. requires advanced driving skills.
In addition, since the boom 22 can be repositioned in a state parallel to the moving direction of the crawler 20 within the radius of the rotation center of the swivel base 21 and the mounting position of the boom mount 26, it is possible to dig ditches within that range. However, since the above-mentioned range is usually within the width dimension of the crawler 20, it is impossible to dig a side ditch outside the path of movement of the crawler 20.

[Purpose of invention]

This invention aims to eliminate the above-mentioned inconveniences and to provide a low-cost attachment that allows ditch digging to be carried out using a shovel-type excavator such as a power shovel that has a boom that can be raised and lowered on a revolving platform. This is considered a technical issue.

[Structure of the idea]

In order to solve the above problems, this invention includes a support that is removably attached to the tip of the rectangular cylindrical arm of a shovel type excavator, and a bucket connection that is fixed to the tip of the support. It consists of a rectangular cylindrical head, a bucket rotatably mounted around a pin passing through both sides of the tip of the rectangular cylindrical head, and a rotation mechanism for rotating the bucket supported by the support body. , the length direction of the head is parallel to the side surface of the prismatic cylindrical arm to which the support is connected and is inclined with respect to a plane passing through the axis of the prismatic cylindrical arm, and the side surface of the head is inclined with respect to a vertical plane. A tilted configuration was adopted.

[Effect]

When the support body is attached to the tip of the arm of a shovel type excavator, the axis of the head for attaching the bucket is inclined with respect to the axis of the arm. In the above-mentioned installation, if the swivel base of the excavator is rotated so that the direction of the arm is inclined with respect to the direction of movement of the excavator, the head will face in the direction of movement of the excavator, and the A bucket is placed on the front side,
Since the excavation direction of the bucket is oriented in the same direction as the moving direction of the excavator, trench digging work can be performed by excavating while moving the excavator in a straight line.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIGS. 1 to 4, the attachment according to this invention is a rectangular cylindrical arm 23 of an excavator.
A support body 1 is provided which can be attached to and detached from the distal end of the head.
As shown in FIG. 2, the support 1 has a pair of trapezoidal support plates 2, 2 placed one above the other, and a pair of side plates 3, 3 attached between the front parts of the support plates 2, 2 to form an arm. 23 is formed into a front insertion space a into which the tip end can be fitted. Further, a plurality of connecting pieces 5 are attached between the rear portions of the pair of support plates 2, 2, and a rear insertion space b is provided in which the central portion of the arm 23 can be fitted. Of the connecting pieces 5 forming this rear insertion space b, each of the connecting pieces 5 provided along the side of the support plate 2 is removably attached to the support plate 2 via bolt-nut fittings. It is being Therefore, by removing the connecting piece 5, the arm 23
The support body 1 can be fitted to the outside of the arm 23 from the side of the distal end of the support body 1.
By sliding the arm 23 in the longitudinal direction of the arm 23, the distal end of the arm 23 is fitted into the front insertion space a.

The support body 1 attached to the tip of the arm 23 as described above is attached to the arm 23 by tightening bolts inserted into holes 6 formed in the pair of side plates 3 and nuts screwed into the bolts.

Note that the support body 1 is not limited to the above configuration, and may be, for example, cylindrical, or a pair of cylinders connected by a plurality of rods.

A rectangular cylindrical head 7 for attaching a bucket is integrally provided at the tip of the support 1. As shown in FIG. 2, the length direction of the head 7 is parallel to the side surface of the prismatic cylindrical arm 23 and inclined with respect to a plane passing through the axis of the arm 23, and as shown in FIG. In particular, the head 7 is mounted so that its side surface 8 is inclined with respect to the vertical plane.

An attachment piece 10 provided on the outer periphery of bucket 9 is rotatably connected to the tip of head 7 via pin 11. A link 12 is connected to the center of the side of head 7, and the tip of link 12 and the tip of link 13 connected to attachment piece 10 of bucket 9 are connected to each other, and a piston rod 15 of a bucket drive cylinder 14 is connected to this connection.

The cylinder 14 is connected to the upper support plate 2 of the support body 1.
It is placed on top and its rear part is supported by a support piece 16. The cylinder 14 is arranged in a straight line with the axis of the head 7 in the plan view shown in FIG. Therefore, by moving the piston rod 15 of the cylinder 14, the pin 1
The bucket 9 can be rotated around 1 without difficulty.

The attachment shown in the embodiment has the above-described structure, and when this attachment is used to perform side ditch digging work, the attachment is attached to the tip of the arm of a power shovel.

Here, as a power shovel, as shown in FIG.
A boom 22 is attached to the boom 22 so that it can be raised and lowered, and an arm 23 is rotatably connected to the tip of the boom 22,
The boom 22 and arm 23 are connected to the cylinder 2
4, 25 is used.

Now, when the support body 1 is attached to the tip of the arm 23, the axial center of the head 7 is inclined with respect to the axial center of the arm 23, as shown in FIG.
When the length direction of the bucket 9 is oriented in the moving direction of the crawler 20, the excavation direction of the bucket 9 is inclined with respect to the moving direction of the crawler 20.

In the above-mentioned installed state, the swivel table 21 is rotated, the arm 23 is inclined with respect to the direction of movement of the crawler 20, and the axis of the head 7 is maintained in a state parallel to the direction of movement of the crawler 20. Then, the bucket cart 9 is placed on the front side of the crawler 20, and the moving direction of the crawler 20 and the excavation direction of the bucket cart 9 become the same, and the boom 2
Excavation work can be carried out by raising and lowering the bucket 2, rotating the arm 23, and rotating the bucket cart 9. In addition, by moving the crawler 20 linearly at the same time as the excavation, it is possible to dig a groove on the side of the road along which the crawler 20 moves.

In the case of the embodiment, an attachment for digging ditches is shown on the right side of the crawler 20, but by tilting the axis of the head 7 in the opposite direction to the axis of the arm 23, the attachment on the left side of the crawler 20 is shown. Can carry out trench digging work.

〔effect〕

As described above, according to this invention, a head is provided at the tip of the support body that is detachably attached to the tip of the arm, and the length direction of the head is connected to the side surface of the rectangular cylindrical arm to which the support body is connected. The bucket belt is parallel to the plane passing through the axis of the square cylindrical arm, and the side surface of the head is tilted to the vertical plane, and the bucket belt is rotatably attached to the head. This makes it possible to perform side ditch digging using an excavator with a boom mounted on a swivel base so that it can be raised and lowered.The simple configuration also reduces costs and reduces the angle of inclination of the head relative to the axis of the arm. By setting a large value, it is possible to perform side ditch digging work at a position outside the width dimension of the crawler.

In addition, since the side surface of the bucket mounting head is inclined with respect to the vertical plane, the entire front edge of the bucket comes into contact with the ground during trench digging, allowing efficient excavation.

[Brief explanation of the drawing]

Fig. 1 is a front view of the attachment according to this invention attached to the tip of the arm, Fig. 2 is a plan view of the same, Fig. 3 is an exploded perspective view of the same, and Fig. 4 is the same as Fig. 3. 5 is a front view of the excavator installed, FIG. 6 is a plan view of the same, and FIG. 7 is a plan view of a conventional excavator capable of digging side ditches. 1...Support, 7...Head, 9...Bucket, 14...Cylinder.

Claims (1)

[Scope of utility model registration request] A support that is detachably attached to the tip of a square tubular arm of a shovel type excavator, a square tubular head for connecting a bucket fixed to the tip of the support, and a tip of the square tubular head. The head is comprised of a bucket rotatably mounted around pins penetrating both sides of the head, and a rotation mechanism for rotating the bucket supported by the support, and the support is connected in the length direction of the head. A shovel type excavator for use in a shovel type excavator, characterized in that the head is parallel to the side surface of the square tubular arm and inclined with respect to a plane passing through the axis of the square tubular arm, and the side surface of the head is inclined with respect to a vertical plane. Gutter digging attachment.