JPH11229746A - Attachment for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve workability, working efficiency and mechanization ratio of an attachment used for excavation works in highly precisely excavating a small circular excavation hole. SOLUTION: An attachment 1 of this device is provided with an attachment base board 1b which is attached to the tip of an arm 3 of a power shovel main body 2 so as to be raised lowered freely and has a bracket 1a in its top part and a rotation, a rotation base board 1d which is rotatably attached to the bottom face of the attachment base board 1b and has a bracket 1c in its bottom part, a fixed bucket 1e which is fixed to the bracket 1c of the rotation base board 1d, and an opening/closing bucket 1f which is attached to the bracket 1c of the rotation base board 1d so as to be opened/closed freely. The outer face of the fixed bucket 1e is parallel to the rotary shaft of the rotation base board and has a curved face internally touching the circular hole to be excavated so as to facilitate the circular excavation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an attachment for a construction machine, such as a power shovel, which is mounted on an end of an arm of a construction machine and is suitable for circular excavation work.

[0002]

2. Description of the Related Art A currently used excavating machine is one in which an attachment for a construction machine of a rectangular excavation type is mounted on a tip of an arm of a shovel car or the like so as to be able to undulate. Therefore, the excavating machine of this specification can move the bucket only in the front-rear direction, and excavates so as to scrape out the soil within the range.

[0003]

Since the above-mentioned excavating machine is intended for large-scale excavation work, a circular deep excavation hole having a radius of about 1 meter, such as a transmission line tower foundation, is excavated with high precision. Unsuitable for work. That is, when digging a digging hole as described above, the digging machine must be digged down while changing the position of the digging hole around the digging hole, which is inconvenient due to poor workability and work efficiency. Further, a large amount of moat residue is apt to be generated around the circular liner, which must be removed by manual operation, so that the mechanization ratio becomes 50% or less. This mechanization ratio is extremely low as compared with general civil engineering excavation work. In addition, construction of power transmission towers that require such work is often performed on the hillside or near the top of the mountain, where space for excavating machines to be moved around drilled holes is limited. For example, the ratio of mechanization is further deteriorated.

Accordingly, an object of the present invention is to improve workability, work efficiency, and mechanization ratio when a small circular hole is accurately excavated in an attachment used for excavation work.

[0005]

According to the present invention, there is provided an attachment for a construction machine which is exchangeably attached to a tip of an arm of the construction machine. A rotating board mounted on the lower surface of the mounting board so as to be rotatable via a motor and rotation transmitting means mounted on the mounting board; a fixed bucket fixed to the rotating board; An open / close bucket pivotally attached to the rotating bucket, wherein the outer surface of the fixed bucket is provided in parallel with the turning axis of the turning board, and has a curved surface inscribed in a circular hole to be cut. When drilling a hole, the rotating board is intermittently turned with the outer surface of the fixed bucket along the circumference of the circular hole and the open / close bucket facing the inside of the circular hole. It is intended to drill by.

[0006] Further, by using a motor with a brake as the motor, a motor having a mechanism for preventing displacement of the turning board may be used.
It is preferable that the disk brake device is built in the motor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (1) shows an attachment for a construction machine of the present invention, (2) shows a power shovel body, and (3) shows an arm. The power shovel body (2) includes a bogie unit 2a, a swivel base 2b pivotally mounted on the bogie unit 2a, and a driver's seat 2c installed on the swivel base 2b. The arm (3) has a first arm 3a attached to the swivel 2b of the power shovel body (2), and a second arm 3b attached to the tip of the first arm 3a, and each arm (3a, 3b). ) Are mounted rotatably back and forth via fluid cylinders (s1, s2) such as hydraulic or air, respectively, and have a bending and stretching mechanism as a whole arm (3). A first mounting portion 3b1 for mounting the attachment (1) is provided at the tip of the second arm 3b (hereinafter, this is synonymous with the tip of the arm (3)).
Are formed. An up / down operation section 3 for attaching the attachment (1) to the second arm 3b so as to be capable of up / down operation.
c is formed. The up / down operation section 3c has an up / down operation cylinder s3 and an up / down operation link 3d. The undulating operation link 3d is a two-folded link, and the base end 3d1 is pivotally mounted at a position slightly closer to the base end than the tip of the arm (3), and the bent portion 3d2 is attached to the undulating operation cylinder s3. A second mounting portion 3d3 is formed at the tip. With the above configuration, the position of the second mounting portion 3d3 can be moved back and forth by operating the undulating operation cylinder s3.

Hereinafter, an attachment (1) according to an embodiment of the present invention will be described with reference to FIGS.

As shown in FIGS. 2 to 5, an attachment (1) of the present invention is mounted on a mounting board 1b having a bracket 1a on an upper portion, and is mounted on a lower surface of the mounting board 1b so as to be able to rotate and a bracket 1c on a lower portion. Swivel board 1 having
d, a fixed bucket 1e fixed to the bracket 1c of the turning board 1d, and an opening / closing bucket 1f attached to the bracket 1c of the turning board 1d so as to be openable and closable, and the bearing 5, the motor 6, and the opening / closing cylinder s4 are provided. Have.

The bracket 1a provided on the upper part of the mounting board 1b is composed of two substantially rectangular members erected in parallel.
The upper end has a first pivot hole 1a1 and a second pivot hole 1a2. The first pivot hole 1a1 is pivotally connected to the first mounting portion 3b1 at the tip of the arm (3) by pin engagement, and the second pivot hole 1a2 is provided.
Is pivotally connected to the second mounting portion 3d3 at the tip of the undulating operation link 3d by pin engagement. For this reason, the undulating operation cylinder s
By operating 3, the attachment (1)
The position of the second pivot hole 1a2 moves back and forth, and rises and falls around the first mounting portion 3b1 at the tip of the arm (3).

As shown in FIG. 6, the swivel board 1d is rotatably mounted on the lower surface of the mounting board 1b via a bearing 5. The turning and turning angle are determined by a motor 6 mounted on the upper surface of the mounting board 1b and a rotation transmitting means (5a1, 5a1) formed between the drive shaft 6a of the motor 6 and the turning board 1d.
6c1).

The bearing 5 includes an inner ring 5a, an outer ring 5b, and a plurality of rolling elements 5c equally arranged between the inner ring 5a and the outer ring 5b via a retainer (not shown). The inner ring 5a is fixed to the upper surface of the turning board 1d, the inner gear 5a1 is formed on the inner diameter surface, and the rolling surface is formed on the outer diameter surface. The outer ring 5b is fixed to the lower surface of the mounting board 1b, and a rolling surface is formed on an inner diameter surface thereof. The rolling element 5c rolls between the rolling surface of the inner ring 5a and the rolling surface of the outer ring 5b.

The motor 6 is a motor with a brake having a hydraulic motor 6a in the upper part and a disk brake device built in the lower part 6b. The hydraulic circuit 7 provided on the opposite side of the bracket 1a has a brake valve. The drive shaft 6c penetrates through the mounting board 1b and protrudes from its lower surface, and a drive pinion 6c1 is fixed to the tip. The rotation transmitting means (5a1, 6a1) is a mesh between a drive pinion 6c1 fixed to the drive shaft 6c and an internal gear 5a1 formed on the inner surface of the inner ring 5a of the bearing 5.
The driving force of the motor 6 is transmitted to the inner ring 5a of the bearing 5 and the turning board 1d to which the inner ring 5a is fixed.

The motor 6 rotates its drive shaft 6c (turning board 1d) by the driving force of the hydraulic motor 6a, and turns the turning board 1d to an arbitrary position. At this time, the brake valve performs a protective action when the motor 6 is overloaded. The disc brake device includes a drive shaft 6c of the motor 6 (the turning board 1).
d) is a device which holds d) stationary at an arbitrary position, and is mounted to prevent the turning substrate 1d from rotating (preventing the excavation position from shifting) due to a load particularly during excavation work. The reason why the motor with a built-in disc brake device is adopted as the motor with brake is that a sufficient braking force can be selected for the excavation load and that the motor 6
In order to make the configuration more compact.

That is, the turning board 1d of the attachment (1) turns freely by 360 degrees by the rotation of the motor 6, and is stopped at an arbitrary turning angle by the braking force of the brake valve of the hydraulic circuit 7. In addition, the turning substrate 1d
Since the disc brake device built in the motor 6 prevents the displacement during excavation work, circular excavation can be performed with high accuracy.

The bracket 1c below the turning board 1d
Is a mounting portion 1c for mounting a fixed bucket 1e at the lower end of two plate-like members erected in parallel with the lower surface of the turning board 1d.
1 and a mounting portion 1c2 for mounting the opening / closing bucket 1f, and a mounting hole 1c3 for mounting the opening / closing cylinder s4 in the middle stage. The opening / closing cylinder s4 is provided between the two brackets 1c. The rear end of the opening / closing cylinder s4 is rotatably attached to the mounting hole 1c2 by pin engagement.

The fixed bucket 1e is a member made of a steel plate, and has a base end 1e1 fixed to the mounting portion 1c1 of the bracket 1c. The shape of the fixed bucket 1e has a side wall 1e2 erected on both sides and an outer surface 1e3 erected in parallel with the turning axis (d1) of the turning board 1d. Further, as shown in FIG. 2, the outer surface 1e3 of the fixed bucket 1e is formed of a curved surface inscribed in the excavation hole from the base end to the tip so as to be suitable for circular excavation. Due to the configuration of the outer surface 1e3, the fixed bucket 1e can accurately perform excavation work along the circular liner of the excavation hole or the inner periphery of the excavation hole.

The opening / closing bucket 1f has a side wall 1f1 erected on both sides and a bucket bottom 1f2 having a tip end side inclined inward.
And a tip 1f protruding from the side wall 1f1 and the bottom 1f2.
3 is a member made of steel plate. The base end of the opening / closing bucket 1f corresponds to the mounting portion 1c2 of the bracket 1c,
And a pivoting piece 1f4 projecting slightly inward from the base end, and an opening / closing cylinder s provided inside the bracket 1c.
Operation piece 1f projected corresponding to piston rod L of No. 4
6 are provided. A pivot hole 1f5 is formed in the pivot piece 1f4, and is pivotally connected to the mounting portion 1c2 of the bracket 1c by pin engagement. A pivot hole 1f7 is formed in the operation piece 1f6, and the operation piece 1f6 is pivotally connected to the mounting portion L1 at the tip of the piston rod L by pin engagement.

Thus, the opening / closing bucket 1f is moved forward and backward by the piston rod L of the opening / closing cylinder s4.
The operating piece 1f6 is pushed and pulled, and the opening / closing operation is performed with the opening / closing radius r3 from the pin engaging position 1f5 to the tip of the opening / closing bucket 1f with the pin engaging position (pivot hole 1f5) of the pivoting piece 1f4 as the center. At this time, the opening / closing cylinder s4 rotates around the rear end of the pin-engaged cylinder s4 in accordance with the movement of the piston rod L in the bracket 1c.

In this embodiment, as shown in FIG.
The tip 1f3 of the opening / closing bucket 1f protrudes from the side wall 1f1. When the opening / closing bucket 1f is closed, the tip 1f3 coincides with the bottom 1e4 of the fixed bucket 1e. It acts to prevent it from spilling over. Also, as shown in FIG.
The side wall 1f1 of the opening / closing bucket 1f and the side wall 1e2 of the fixed bucket 1e have shapes that match each other when the opening / closing bucket 1f is closed. Thereby, when the opening / closing bucket 1f is closed, both side walls (1e
2, 1f1) can be prevented, and the excavated soil can be prevented from spilling from the side.

In the above-mentioned attachment (1), a hydraulic motor 6 for operating the turning drive of the turning board 1d, and
Opening / closing cylinder s4 for opening / closing opening / closing bucket 1f
Are driven by hydraulic operation. In the present embodiment, since these are remotely controlled in the driver's seat 2c of the power shovel body (2), the hydraulic pipe 8 is connected to the power shovel body along the arm (3) from the motor 6, the hydraulic circuit 7, and the opening / closing cylinder s4. Pull to (2),
The driver's seat 2c is provided with switches and levers for operating these.

When drilling a circular hole using the above-mentioned attachment (1), first, the turning of the swivel 2b of the power shovel body (2) and the bending and elongation of the arm (3) cause the tip of the arm (3) to be excavated. Attachment attached (1)
However, the excavator is operated so that the excavator comes to the excavation position on the circumference of the circular hole to be excavated. Next, as shown in FIG. 1, the attachment (1) is raised and lowered so that the turning axis (d1) of the turning board 1d is parallel to the center line (d2) of the hole to be cut. Bucket 1e
The turning board 1d of the attachment (1) is operated so that the outer surface 1e3 of the attachment (1) is along the circumference of the excavation hole and the opening / closing bucket 1f faces the inside of the excavation hole.

Here, in FIG. 2, (c1) indicates the center of rotation (O) of the attachment (1) when positioning the excavation.
1) indicates the locus of movement, (c2) indicates the circumference of a circular excavation hole to be excavated, and (O2) indicates the center of the excavation hole.

After the above operation, the excavation of the circular hole is performed in a state where the open / close bucket 1f is opened, and excavation is performed while the outer surface 1e3 of the fixed bucket 1e is along the circular liner or the inner peripheral surface of the excavation hole. At this time, the outer surface 1 of the fixed bucket 1e
e3 is parallel to the turning axis (d1) of the turning substrate 1d, and
Since it has a curved surface inscribed in the circular hole, the outer surface 1e3 of the fixed bucket 1e is aligned with the inner peripheral surface of the circular hole while the revolving axis (d1) of the revolving board 1d is parallel to the center line (d2) of the circular hole. By performing the excavation while performing the excavation, the excavation along the circular liner of the excavation hole can be accurately performed.

Thereafter, the earth and sand excavated in this way are removed from the fixed bucket 1 with the opening / closing bucket 1f closed.
e and is held by the opening / closing bucket 1f and discharged out of the excavation hole. Excavation of a circular hole is performed while sequentially changing such excavation positions along the circumference.

The above embodiment shows an optimal embodiment of the construction machine attachment of the present invention. However, various modifications can be made to each component according to the purpose of implementation. For example, as the motor mounted on the mounting board, a hydraulic motor has been described as a suitable motor capable of obtaining a sufficient turning ability even under a large load holding excavated soil, but a sufficient output is provided according to the holding capacity of the bucket. Any other format may be used as long as it can be selected. Further, in the above-described embodiment, the motor incorporates the disc brake device in order to obtain a sufficient braking force that can withstand the excavation load.

The motor of the present invention is not limited to the above, and may be a combination of a motor mechanism having a driving force sufficient to turn the turning board and a braking mechanism having a braking force capable of withstanding the excavation load. In addition, if the small attachment according to the present invention is such that the excavation load can sufficiently cope with the braking force of the hydraulic circuit, the disk brake device built in the motor can be omitted.

Further, in a configuration in which the center of the circular hole coincides with the center of rotation of the swivel board, the positions of the swivel and the arm of the power shovel body are set at fixed positions, and By changing the excavation position in order by operating the turning, a circular hole can be excavated.

As described above, since the attachment for construction equipment of the present invention was developed to excavate a circular hole with high accuracy, the width (size) of the bucket is limited to the shape shown in the above embodiment. Not something. In addition, for other uses for construction, for example, by gripping and transporting building materials with a fixed bucket and an opening / closing bucket, and by cutting blades and the like by forming blades on side walls of the fixed bucket and the opening / closing bucket. Can be used for applications.

The attachment for a construction machine of the present invention (hereinafter referred to as the "attachment of the present invention") has been devised for excavating a circular hole with high accuracy as described above. By applying the brake-equipped motor or the disc brake built-in motor used in the attachment of the present invention to an attachment for other uses having the above, it is possible to strengthen the turning position holding force of the turning substrate in such an attachment. Thus, it is possible to improve the working accuracy of the attachment.

[0032]

The attachment for a construction machine according to the present invention comprises:
Since the outer surface of the bottom of the fixed bucket is formed of a curved surface that is parallel to the turning axis of the turning substrate and can be inscribed in the circular hole, excavation work along the circular liner of the circular hole can be performed with high accuracy.

The attachment for a construction machine of the present invention is attached to the tip of a power shovel, which is a general-purpose machine,
When excavating a circular excavation hole, the excavator can be excavated along the circumference of the excavation hole while changing the excavation position in order by turning the swivel and bending and extending the arm. Circular excavation holes can be excavated to improve work efficiency and mechanization ratio. This advantage is particularly effective when there is no space for moving the excavator around the borehole.

Further, since the open / close bucket is provided and the excavated earth and sand is discharged to the outside of the excavation hole while being held by the fixed bucket and the open / close bucket, the discharged soil is hardly spilled from the bucket and workability and work efficiency are improved. Is being improved.

Further, by using a motor with a brake as the motor, it is possible to prevent the turning substrate from being displaced with respect to the excavation load. In this case, the configuration of the motor with a brake can be made compact by using the motor with a brake as a motor with a built-in disc brake device.

Further, by applying the above-mentioned motor with brake and the motor with a built-in disc brake to an attachment having a turning board, the turning position holding force of the turning board can be improved, and the working accuracy can be improved. Can be planned.

[Brief description of the drawings]

FIG. 1 is a side view showing a use state of an excavator using an attachment according to an embodiment of the present invention.

FIG. 2 is a plan view of the attachment according to the embodiment of the present invention.

FIG. 3 is a front view of the attachment according to the embodiment of the present invention.

FIG. 4 is a bottom view of the attachment according to the embodiment of the present invention.

FIG. 5 is a right side view of the attachment according to the embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of a turning board of the attachment according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Attachment for construction machines 1a, 1c Bracket 1b Mounting board 1d Swivel board 1e Fixed bucket 1e3 Outside surface of fixed bucket 1f Opening / closing bucket 2 Power shovel body 2a Truck part 2b Swivel base 2c Driver's seat 3 Arm 3a First arm 3b Second arm 3b1 First mounting part 3c Undulating operation part 3d Undulating operation link 3d1 Base end 3d2 Folding part 3d3 Second mounting part 5 Bearing 6 Motor 7 Hydraulic circuit 8 Hydraulic piping s1, s2 cylinder s3 Undulating operation cylinder s4 Opening / closing cylinder

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[Procedure amendment]

[Submission date] April 12, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

An attachment for a construction machine according to the present invention includes a mounting board mounted on the mounting board so as to be able to move up and down around the tip of an arm of the construction machine, and a motor and rotation transmitting means mounted on the mounting board. In a construction machine attachment having a turning board rotatably mounted on the lower surface of the mounting board, a fixed bucket fixed to the turning board, and an opening / closing bucket pivotally connected to the fixed bucket so as to be openable and closable, The fixed bucket has side walls erected on both sides , and an outer surface having a curved surface extending from a base end to a distal end, which is parallel to the turning axis of the turning substrate and inscribed in a circular hole to be excavated.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Deleted

Claims (5)

[Claims] 1. A mounting board which is mounted to be able to move up and down around an end of an arm of a construction machine, and a turning board which is mounted to be rotatable on a lower surface of the mounting board via a motor and rotation transmitting means mounted on the mounting board. And a fixed bucket fixed to the turning board, and an opening / closing bucket pivotally attached to the fixed bucket so as to be openable and closable with respect to the fixed bucket, wherein an outer surface of the fixed bucket has a turning axis of the turning board. And has a curved surface inscribed in the circular hole to be excavated, and when excavating the circular hole, aligns the outer surface of the fixed bucket along the circumference of the circular hole, and opens and closes the fixed bucket. An attachment for a construction machine, wherein a bucket is turned intermittently toward a inside of a circular hole to excavate the bucket. 2. The attachment for a construction machine according to claim 1, wherein the motor has a brake device, and the brake device prevents a displacement of the turning board under a work load such as excavation work. Attachment for construction machinery characterized by the following. 3. The attachment for a construction machine according to claim 1, wherein the motor has a built-in disc brake device, and the disc brake device is used for a work load such as excavation work.
An attachment for a construction machine, wherein the displacement of the turning board is prevented. 4. A construction machine having a mounting board attached to a tip of an arm of the construction machine, and a swivel board rotatably mounted on a lower surface of the mounting board via a motor and rotation transmitting means mounted on the mounting board. An attachment for a construction machine, wherein the motor is a motor with a brake. 5. A construction machine having a mounting board attached to a tip of an arm of the construction machine, and a swivel board rotatably mounted on a lower surface of the mounting board via a motor and rotation transmitting means mounted on the mounting board. An attachment for a construction machine, wherein the motor is a motor built in a disc brake device.