JPH09189045A - Swing sieve type clam bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent dripping by a clam bucket structure capable of opening and closing a bucket with sieving part form the on two surfaces so as to increase the efficiency of sorting, and making the entire bucket in a structure that can be rotated drivingly for sorting so as to eliminate the vertical oscillating operation of an arm by an operator and increase the work efficiency and reduce the labor of the worker. SOLUTION: A swing board 3 which is installed through a bearing 2 rotatably on an attachment installation board 1 installed replaceably at the top end of the arm b2 of a construction machine (a) through a bracket is made rotated drivingly by a motor 4 through a rotation transmitting means. Also a first bucket 6 is fixed to the swing board 3 through the bracket, and a second bucket 7 pivoted openably to the first bucket 6 is driven openably by an opening and closing cylinder 8. Then the first and second buckets 6 and 7 are provided with sieving parts 6a and 7a to sieve lumps of less than a specified grain size.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swivel sieve type clam bucket which is replaceably attached to an arm tip of a construction machine such as a power shovel and is used for forest road improvement work and other civil engineering works.

[0002]

2. Description of the Related Art In the improvement work of forest roads, especially in the total renovation work, existing forest roads are removed and the roadbed materials (concrete debris, etc.) are reused. In this case, there is no particular restriction on the particle size of the roadbed material to be reused, and it was up to the construction contractor to decide to what extent the particle having a large particle size should be reused.

However, the particle size of the roadbed material is said to have an influence on the damage of the forest road, and it is instructed to use the roadbed material having a certain size or smaller. Therefore, in the future, when removing the existing forest road and reusing the roadbed material, it will be necessary to select the particle size of the removed roadbed material and reuse only those with the above particle size or less. Came.

However, at a construction site such as a forest road, it is not possible to install a dedicated sorting machine because of locational restrictions and reduction of construction cost. Therefore, the working methods that have been adopted so far, namely, excavation, peeling of stones, crushing, Adopting a method in which various attachments for loading, leveling, leveling, etc. are exchanged and attached to the arm tips of construction machines such as power shovels, etc. Has been.

[0005]

As a conventional attachment for sorting work, there is a screen bucket, but since this is only fixedly attached to the arm tip of the working machine main body, it is placed on a forest road or the like. Sorting is done by scooping up the roadbed material mixed with earth and sand and shaking it up and down to shake off particles with a particle size smaller than the screen pitch.

However, in this case, the sieving portion is only on the lower surface, it takes time to complete the sorting of all, and at the same time, there is a drawback that unsorted ones spill from the upper surface of the bucket, and The shaking motion must be performed by the operator continuously reciprocating the arm up-and-down operation lever of the working machine main body, which causes the operator to be very tired and the scooping amount per time is small. There is a problem that the number of operations increases and the work efficiency is low.

The present invention has a clam bucket structure capable of opening and closing the bucket to prevent spillage and improve the efficiency of the sorting work by forming the sieving portion on two surfaces, and to make the entire bucket swingable. The purpose of this is to eliminate the need for the operator to perform a swinging operation of the arm up and down by sorting.

[0008]

In order to achieve the above-mentioned object, the present invention swivels a swivel board via a bearing to an attachment mounting board that is replaceably mounted on the arm tip of a construction machine via a bracket. A swivel board can be swivel-driven through a rotation transmission means by a motor that is mounted so that it can be mounted on an attachment mounting board, and a first bucket is fixed to the swivel board through a bracket, and the swivel board is fixed to the first bucket. The second bucket so that the second bucket can be opened and closed, and the opening and closing cylinder can drive the second bucket to open and close with respect to the first bucket. It is provided with a sieving portion for sieving a product.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view of a construction machine equipped with a clam bucket of the present invention, in which a is a construction machine, b1 is a boom, b2 is an arm, and c is the clam bucket of the present invention. Shows. The construction machine a has a traveling carriage part a1.
A swivel base a2 mounted on the traveling carriage a1 so that the swivel drive is possible, and a driver's seat a3 installed on the swivel base a2.
And a boom b1 whose base is attached to the swivel a2 near the driver's seat a3 so that the base can be raised and lowered, an arm b2 whose base is attached to the tip of the boom b1 so that the base can be bent and extended, and a hoisting operation to the tip of the arm b2. Although a power shovel to which various work attachments are attached so as to be capable of undulating via a link b3 is illustrated, other types of power shovels may be used. However, it is preferable that the attachment is attached to the tip of an arm that can be vertically raised and lowered so that the attachment can be raised and lowered.

The clam bucket c according to the present invention is shown in FIG.
2 (A) (B) (C) and FIG. 3 (A) (B)
As shown in (C) and (D), the swivel board 3 via the bearing 2 is attached to the attachment mounting board 1 that is replaceably mounted on the tip of the arm b2 of the construction machine a via the bracket 1a.
Is mounted so that it can be swung, and the swivel board 3 can be swung by the motor 4 mounted on the attachment mounting board 1 via the rotation transmission means 5. The first bucket 6 is mounted on the swivel board 3 via the bracket 3a. The second bucket 7 is pivotally attached to the first bucket 6 so that the second bucket 7 can be opened and closed.
Further, the opening / closing cylinder 8 enables the second bucket 7 to be opened / closed with respect to the first bucket 6, and moreover, the first bucket 6 and the second bucket 7 are used for sieving lumps having a predetermined particle size or less. The parts 6a and 7a are provided.

The attachment mounting substrate 1 is integrally formed with a bracket 1a on the rear surface thereof.
a has a first pivot hole 1b and a second pivot hole 1c. The first pivot hole 1b is pivotally attached to the tip of an arm b2 of the construction machine a by a pin 1d, and the second pivot hole 1c is It is pivotally attached to the tip of the undulating operation link b3 by a pin 1e. The hoisting operation link b3 is a two-folded link, the base end of which is pivotally mounted at a position slightly closer to the base end side than the tip of the arm b2, and the intermediate point is pushed and pulled by the hoisting operation cylinder b4. The attachment mounting substrate 1 is caused to move up and down at the tip of the arm b2.

On the front side of the attachment mounting substrate 1, a swivel substrate 3 is mounted via a bearing 2. As shown in FIG. 2 (C), this bearing 2 is composed of an inner ring 2a, an outer ring 2b, and rolling elements 2c that are equally arranged via a cage (not shown) or the like between them. The turning board 3 is fixed to the rear surface side, and the outer ring 2b is fixed to the front surface side of the attachment mounting board 1. A motor 4 is mounted on the attachment mounting board 1.
The rotary substrate 3 can be driven to rotate via the rotation transmission means 5. The rotation transmitting means 5 is composed of a drive pinion 5a fixed to the output shaft of the motor 4 and an internal gear 5b meshing with the drive pinion 5a. The internal gear 5b is formed on the inner circumference of the inner ring 2a of the bearing 2. The swivel substrate 3 can be swivel driven. Further, the motor 4 preferably uses a plurality of hydraulic motors that are operated in parallel. The reason is that by adopting a system in which a plurality of units are operated in parallel, the output load of each motor can be reduced, the motor can be downsized, and the radius of gyration of the bearing 2 can be reduced. Also,
If a hydraulic motor is used, it is possible to easily ensure a stable swinging motion with respect to changes in load. A brake valve 4a is connected in parallel to the hydraulic circuit for parallel operation of the motor 4 so that one brake valve 4a can be connected during braking of the hydraulic motor.
In a, the braking force corresponding to the set pressure of the brake valve 4a is applied to the plurality of hydraulic motors so that the bucket can be stopped at a predetermined turning angle.

A bracket 3a is provided on the front side of the swivel board 3.
Are integrally formed, and the rear surface of the first bucket 6 is integrally fixed to the bracket 3a. A bracket 7b on the rear surface of the first bucket 6 is pivotally attached to a bracket 7b on the rear surface of the second bucket 7 via a pin 7c. The opening / closing cylinder 8 is connected to another bracket 7d on the rear surface of the second bucket 7 and the bracket 3a on the front surface side of the swivel board 3 via pins 8a and 8b. This allows
The second bucket 7 can be opened and closed with respect to the first bucket 6 by using a pin 7c as a pivot point. The opening / closing cylinder 8 is preferably a hydraulic cylinder. The reason is that the roadbed material is stored in the first bucket 6 and the second bucket 7 while the second bucket 7 is closed and the whole is swung, so that the roadbed is kept even when the second bucket 7 is on the lower side. This is to reliably prevent the second bucket 7 from opening due to the weight of the material. Further, since a hydraulic motor is used as the turning drive source, the drive sources are unified and the driving force is extracted from the same drive source. Normally, hydraulic pressure is used for the turning motion of the construction machine a, the undulating motion of the arm, and the like, and the hydraulic pressure is used to enable the respective operations. That is, the driver's seat a3 is equipped with operating means such as switches and levers for operating the motor 4 and the opening / closing cylinder 8.

Sieving portions 6a and 7a are formed on the first bucket 6 and the second bucket 7, and claws 6b and 7b for facilitating the scooping operation are alternately attached to the tips. is there. The sieving portions 6a and 7a have openings formed on the bottom surface or the top surface, which are the main parts of the bucket, and a plurality of vertical rails and horizontal rails are attached to this opening in a grid pattern at appropriate intervals. The size of the squares is configured so that lumps having a predetermined particle size (for example, 80 mm) or less can pass through and be sieved. The vertical rails and the horizontal rails serve as reinforcing ribs for preventing the strength of the bucket from decreasing at the opening, and maintain the functions of excavating and scooping the bucket. The sieving portions 6a and 7a can also be formed on the side surface of the bucket.

The clam bucket c of the present invention has the above-mentioned structure. Next, the working procedure thereof will be described. For example, in the case of repairing a forest road, the work is performed by attaching an attachment such as a ripper or a backhoe bucket for peeling and removing the roadbed material of the forest road to the tip of the arm b2 of the construction machine a. When the peeling of the roadbed material is completed, the tip attachment is replaced with the clam bucket c of the present invention, and the piled or flatly stacked roadbed material is boom b1.
By appropriately operating the arm b2 and the undulation operation link b3, the second bucket 7 is opened by the opening / closing cylinder 8 to approach the second bucket 7, and the second bucket 7 is closed to pick up the roadbed material from above or scoop it from below. It is moved to the side and the motor 4 is driven to rotate the rotating substrate 3 via the rotation transmitting means 5, thereby rotating the first bucket 6 and the second bucket 7 in the closed state. In this case, the turning speed may be low, and it is preferable that the turning axis is turned with some inclination (for example, about 0 to 45 degrees) from the vertical. As a result, the subgrade materials in the first bucket 6 and the second bucket 7 are alternately moved up and down with a drop according to the inclination of the turning axis, and the same effect as the stirring action is generated, and the particle size is equal to or smaller than the predetermined particle size. The materials are dropped and discharged one after another from the sieving portions 6a and 7a, so that the roadbed material can be efficiently sorted. Note that the roadbed material remaining in the bucket with a particle size equal to or larger than the predetermined particle size is
You can move it to the truck bed as it is, or put it in another place,
This operation is repeated one after another. After that, the roadbed material having a predetermined particle size or more is crushed again and used, or used for another purpose (for example, land reclamation of the coast). Also, the present invention
It is not limited to the repair work of forest roads, but may be applied to other civil construction works.

[0016]

According to the present invention, a clam bucket structure capable of opening and closing a bucket with a sieving portion is used to prevent spillage, and the sieving portion is formed on two surfaces to improve the efficiency of the sorting work. The whole structure can be swivel-driven to perform the selection so that the operator does not need to swing the arm up and down, thereby improving the work efficiency and reducing the labor of the worker.

[Brief description of the drawings]

FIG. 1 is a schematic view of a construction machine equipped with a clam bucket of the present invention.

2A is a side view of the clam bucket in a closed state, FIG. 2B is a side view of the clam bucket in an open state, and FIG.

3A is a plan view of a clam bucket, FIG. 3B is a rear view thereof, FIG. 3C is a front view, and FIG.

[Explanation of symbols]

 a Construction machine b1 Boom b2 Arm c Clam bucket 1 Attachment mounting board 2 Bearing 3 Swing board 4 Motor 5 Rotation transmission means 6 1st bucket 7 2nd bucket 8 Open / close cylinder

Claims (1)

[Claims] 1. A swivel board is rotatably mounted on a mounting board, which is replaceably mounted on a tip of an arm of a construction machine, through a bracket, and a rotation is transmitted by a motor mounted on the mounting board. A swivel board can be swivel-driven via a means, a first bucket is fixed to the swivel board via a bracket, and a second bucket is pivotally attached to the first bucket so as to be openable and closable.
Further, the opening / closing cylinder enables the second bucket to be opened / closed with respect to the first bucket, and the first bucket and the second bucket are provided with a sieving portion for sieving lumps having a predetermined particle size or less. A swivel type clam bucket characterized by the following.