JP2000170119A - Pavement ground cutting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive the miniaturization and lightweight of a pavement ground cutting device. SOLUTION: A pavement ground cutting device A drives and rotates a disk blade to cut a pavement ground. An attached part 10 for rotatably and detachably being mounted around a shaft core substantially parallel with a disk blade rotation shaft core in place of a bucket on a bucket attaching part 35 provided on the arm of a hydraulic shovel B on a machine frame 2 drivably and rotatably supporting the disk blade, and a connected part 13 for rotatably and detachably being connected around a shaft core substantially parallel with the disk blade rotation shaft core in place of the bucket on a bucket connection part 37 provided on the piston rod 42 of the bucket swinging hydraulic cylinder S3 of the hydraulic shovel are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pavement ground cutting apparatus for cutting a pavement ground by driving and rotating a disk blade.

[0002]

2. Description of the Related Art A conventional pavement ground cutting apparatus includes a machine frame which has a disk blade protruding downward and is rotatably supported by driving, and a traveling wheel rotatable at a fixed height position with respect to the machine frame. , A grounding wheel that can be raised and lowered with respect to the machine frame is provided in front and back, and the machine frame is supported so that it can travel along the pavement ground, and the weight of the machine frame that moves down with the lifting operation of the grounding wheel Pressing the disk blade against the pavement ground from above, cutting the pavement ground to a desired depth, and pressing the disk blade against the pavement ground from the horizontal direction with the traveling movement of the machine frame, Cut to desired length.

[0003]

For this reason, it is necessary to provide a machine frame having an elevating mechanism for elevating and lowering the grounding wheel and a traveling wheel, and furthermore, to dispose the disk blade from above the pavement ground by the weight of the machine frame. It is necessary to give the machine frame an appropriate weight so that it can be pressed, so it is difficult to reduce the size and weight of the pavement ground cutting device so that there is no need to load, store, or unload the work site. There is.

The present invention has been made in view of the above circumstances, and has as its object to reduce the size and weight of a pavement ground cutting device.

[0005]

According to a first aspect of the present invention, there is provided a pavement ground cutting apparatus for cutting a pavement ground by driving and rotating a disk blade, wherein the disk blade is rotatably supported. Attached to a bucket mounting part provided on the arm of a hydraulic excavator on a machine frame that has been mounted, in place of a bucket, so as to be rotatable and detachable around an axis substantially parallel to the disk blade rotation axis. And a bucket connecting portion provided on a piston rod of a hydraulic cylinder for rocking the bucket of the hydraulic shovel, instead of a bucket, being rotatable about an axis substantially parallel to the disk blade rotation axis, and detachable. The point is that a connected portion to be freely connected is provided.

In other words, attention is paid to the fact that a hydraulic excavator is often used in a work site for cutting a pavement ground, and a bucket is detached from the hydraulic excavator, and a bucket mounting portion is provided on a machine frame instead of the bucket. The attached portion is rotatably and removably attached around an axis substantially parallel to the disk blade rotation axis, and the connected portion provided on the machine frame is replaced with a disk at the bucket connecting portion instead of the bucket. The machine frame is moved up and down in the same manner as when the bucket is swung by the expansion and contraction operation of the bucket swing hydraulic cylinder by being freely and removably connected around an axis substantially parallel to the blade rotation axis. The swinging operation can be performed in the direction, and the machine frame can be moved by a traveling device originally provided in the hydraulic excavator.

Therefore, the disk blade can be pressed against the pavement ground from above by the extension or contraction operation of the bucket swing hydraulic cylinder to cut the pavement ground to a desired depth.
In addition, by moving the machine frame by the traveling device of the hydraulic excavator, the disc blade is pressed against the pavement ground from a horizontal direction, and the pavement ground can be cut over a desired length. It is not necessary to provide a wheel or a running wheel or to give a weight to the machine frame, and the pavement ground cutting device can be reduced in size and weight.

According to a second aspect of the present invention, the machine frame having the mounted portion attached to the bucket mounting portion and the connected portion connected to the bucket connecting portion is supported on the ground side. A possible grounding wheel is rotatably supported at a position radially away from the disk blade around a single axis substantially parallel to the disk blade rotation axis.

That is, since the machine frame mounted in place of the bucket can be supported on the ground side by the grounding wheel supported at a position radially away from the disc blade, excessive pressing force is applied to the disc blade during cutting. This can prevent the disk blade from being damaged by acting on it, and adjust the amount of protrusion of the disk blade below the grounding wheel supported on the ground side by swinging the machine frame, and paving The disk blade can be pressed against the pavement ground so that the cutting depth of the ground becomes the desired depth, and the grounding wheel is rotated around a single axis substantially parallel to the disk blade rotation axis. Since it is freely supported, it is possible to cut the pavement ground over a desired length by running while the machine frame is supported on the ground side by the grounding wheel.

Therefore, the pavement ground can be cut at a desired depth and a desired length while preventing the disk blade from being damaged.

A feature of the invention according to claim 3 is that a hydraulic motor for driving and rotating the disk blade is provided so as to be freely driven by hydraulic oil supplied from a hydraulic pump mounted on the hydraulic excavator.

That is, the hydraulic motor that drives and rotates the disk blade can be driven by hydraulic oil supplied from a hydraulic pump mounted on a hydraulic shovel to cut the pavement ground.

Therefore, it is possible to further reduce the size and weight of the pavement ground cutting apparatus.

According to a fourth aspect of the present invention, there is provided an auxiliary grounding wheel capable of restricting a cutting depth of the pavement ground by the disk blade in cooperation with the grounding wheel.

That is, when the paving ground is cut while lowering the disk blade by the swinging operation of the machine frame in a state where the grounding wheel is in contact with the ground, the auxiliary grounding wheel is grounded on the ground. Further, the further lowering of the disk blade is prevented in cooperation with the grounding wheel, so that the cutting depth of the pavement ground by the disk blade can be restricted.

Therefore, it is easy to cut the pavement ground at a desired cutting depth.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIGS. 1 to 3 show a pavement ground C made of asphalt, concrete or the like by driving and rotating a disk blade 3.
6 and 7 show a backhoe B as an example of a hydraulic shovel in which the pavement ground cutting device A is mounted in place of the bucket 23. FIG.

The backhoe B is, as shown in FIG.
A traveling unit 25 provided with a pair of left and right crawler traveling devices 24 driven by a traveling hydraulic motor M2 includes
A swivel 28 having a motor 6 and a control unit 27 is mounted so as to be swivelable about a vertical axis by driving a hydraulic motor M3 for swiveling, and the swivel 28 is equipped with a backhoe device 29.

The backhoe device 29 connects an arm 31 and a bucket 23 to a boom 30 which is vertically swingably connected to a swivel table 28, and drives the boom 30 with respect to the swivel table 28. A hydraulic cylinder for swinging boom S1, a hydraulic cylinder for arm S2 for driving and swinging the arm 31 with respect to the boom 30, and a hydraulic cylinder for bucket swinging S3 for driving and swinging the bucket 23 with respect to the arm 31 are provided. It is configured to perform excavation work.

The driving unit 26 is provided with an engine, a hydraulic pump group, a hydraulic oil tank, and the like. A lower part of the control unit 27 is provided with a hydraulic motor M2, M3 and a hydraulic cylinder S1, S2, S3. A hydraulic control valve group for service and a hydraulic control valve V for service for taking out hydraulic oil from one hydraulic pump P of the hydraulic pump group as needed.
The steering unit 27 includes a traveling hydraulic motor M
Left and right traveling control levers for operating the hydraulic control valves 2 and the hydraulic cylinders S1,
An operation lever group 32 such as left and right operation levers for operating the hydraulic control valves of S2, S3 and the turning hydraulic motor M3 is provided.

A service operation lever 33 for operating the service hydraulic control valve V is provided on the lateral side of the swivel table 28.
A pair of delivery ports 34a and 34b for circulating hydraulic oil supplied and discharged by the service hydraulic control valve V to and from an external device are provided.

The bucket 23, as shown in FIG.
Left and right brackets 38 fixed to the bucket 23 using the arm tip 35 having a rectangular cross section as a fixed link,
The left and right swing links 36 and the left and right connecting links 37 constitute a quadruple link mechanism, and are relatively swingably and detachably connected to the arm tip 35 and the connecting links 37 by connecting pins 39 and 40. The connecting pin 40 connecting the swing link 36 and the connecting link 37 is connected to the piston rod 42 of the bucket swing hydraulic cylinder S3, and the bucket 2 is moved by the expansion and contraction operation of the bucket swing hydraulic cylinder S3.
3 is configured to swing.

Then, the arm tip 35 is connected to the bucket 2
3 is configured as a bucket mounting portion that is mounted on the arm 31 with the connecting pin 39, and the connecting link 37 is configured as a bucket connecting portion that connects the bucket 23 to the piston rod 42.

As shown in FIGS. 1 to 3, the pavement ground cutting device A includes a disk blade 3 mounted on a substantially L-shaped plate-like machine frame 2 having a mounting portion 1 to a backhoe device B. A disk blade drive unit 4 rotatably supported, left and right ground wheels 5 supported at positions sandwiching the machine frame 2, and a cutter line guide 6
And a cover 7 surrounding the upper half of the disk blade 3.

The mounting portion 1 is rotated on one side surface of the arm tip portion 35 by a connecting pin 9 inserted through the boss member 8 instead of the bucket 23 around an axis substantially parallel to the disk blade rotation axis X. Attached part 10 that can be freely and detachably attached
And one of the connecting links 37, instead of the bucket 23,
A connecting portion 13 is provided, which is rotatably and removably connected around an axis substantially parallel to the disk blade rotation axis X by a connecting pin 12 inserted through the boss member 11.

The grounding wheel 5 includes a pavement ground cutting device A,
As will be described later, in a state where the machine frame 2 is mounted on the backhoe device 29 instead of the bucket 23, the disc blade rotation axis X is located at a position radially away from the disc blade 3 so that the machine frame 2 can be supported on the ground side. It is rotatably supported around a single axis substantially parallel to.

The disk blade drive unit 4 is configured by attaching a cutting hydraulic motor M1 having a pair of delivery ports 14a and 14b for supplying and discharging hydraulic oil to a fixing block 15, and the fixing block 15 is provided. The disk blade 3 is removably fixed to the drive shaft 16 protruding from the fixing block 15 while being fixed to the machine frame 2 with screws, and the disk blade 3 is driven and rotated by the driving of the cutting hydraulic motor M1. It is configured in.

The cutter line guide 6 supports the tip of a swing arm 17 supported on the machine frame 2 so as to be able to swing up and down by a caster wheel 18 and the tip of the swing arm 17 in the left-right direction. A pointer 19 slidably supported is fixed by a wing bolt 20, and the pavement ground cutting device A mounted on the backhoe device 29 is cut along a scheduled cutting line L drawn by the pointer 19 in advance on the pavement ground C. Thus, the pavement ground C can be cut along the cut line L.

The cover 7 is provided with a handle 7a on an upper plate of the cover, and a tongue piece 21 fixed to the machine frame 2 is inserted into an insertion portion 22 formed on the cover side plate to be fixed in a vertically removable manner. I have.

FIG. 4 shows a state in which the pavement ground cutting device A is mounted on a backhoe device 29 instead of the bucket 23. Attached to one side of the part 35,
Further, the connected portion 13 is connected to one of the connecting links 37 by the connecting pins 12, and the other connecting link 37 and the arm end portion 35 are connected by a link member 43.

The delivery ports 14a, 14b of the cutting hydraulic motor M1 and the delivery ports 34a, 34b provided on the swivel 28 are connected by hydraulic hoses 44a, 44b. When the control valve V is operated, the hydraulic pressure is supplied from the hydraulic pump P mounted on the backhoe B to the cutting hydraulic motor M1, and the disk blade 3 is driven to rotate.

Then, as shown in FIG. 5 (a), with the disk blade 3 floating above the pavement ground C, the pavement ground cutting device A is lowered until the grounding wheel 5 touches the pavement ground C.
From this state, as shown in FIG. 5B, while the grounding wheel 5 is kept in contact with the pavement ground C, the pavement ground cutting device A is gradually swung downward, and the pavement ground C is When the pavement ground cutting device A is rocked until the desired cutting depth is obtained, the machine frame 2 is moved by the crawler traveling device 24 while maintaining the rocking posture, as shown in FIG. By traveling, the pavement ground C is cut over a desired cutting length.

Therefore, the bucket swing hydraulic cylinder S3
In the same manner as the swing operation of the bucket 23, the machine frame 2 can be operated to swing in the vertical direction by the extension and contraction operation of the bucket 23, and the crawler traveling device 24 originally provided in the backhoe B allows the machine frame 2 to be operated. Can be traveled, the disk blade 3 can be pressed against the pavement ground C from above by the contraction operation of the bucket swing hydraulic cylinder S3, and the pavement ground C can be cut to a desired depth. The disk blade 3 is pressed against the pavement ground C from the horizontal direction by the traveling movement of the machine frame 2 by the traveling device 24, and the pavement ground C
Can be cut to a desired length.

[Second Embodiment] FIG. 8 shows an auxiliary grounding wheel 45 capable of regulating the cutting depth of the pavement ground C by the disk blade 3 in cooperation with the grounding wheel 5, and a disk blade rotating shaft center of the machine frame 2. X is supported rotatably around an axis substantially parallel to the disk blade rotation axis X at a position facing the ground wheel 5 with the X interposed therebetween, and the machine frame 2 in a state where the ground wheel 5 is grounded is Auxiliary contact wheel 4 with downward swing
5 shows an embodiment in which the grounding of No. 5 regulates the cutting depth of the pavement ground C.

As shown in FIG. 9, a bolt 47 fixed to the wheel support frame 46 is inserted into a through hole of a mounting piece 48 fixed to the machine frame 2 to move the mounting piece 48 from above and below. It is fixed by a nut 49 screwed so as to sandwich it, and the fixing position in the vertical direction is changed so that the cutting depth according to the thickness of the pavement ground C can be regulated. Other configurations are the same as those of the first embodiment.

[Third Embodiment] FIG. 10 shows another embodiment of the mounting portion 1 for the backhoe device 29.
Is formed in an upward U-shape into which the arm tip 35 enters, and the attached portion 10 is attached to the left and right sides of the arm tip 35 with the connecting pin 9 penetrating the arm tip 35, and is attached. The connecting portion 13 is connected to the left and right connecting links 37 by the connecting pins 12. Other configurations are the same as those of the first embodiment.

[Other Embodiments] <1> The pavement ground cutting apparatus according to the present invention may be configured so that the disk blade is driven and rotated by an electric motor. <2> The pavement ground cutting device according to the present invention may be mounted on a hydraulic excavator equipped with a tire-type traveling device instead of a bucket. <3> The pavement ground cutting device according to the present invention may not include the grounding wheel and the auxiliary grounding wheel in the machine frame. <4> The hydraulic excavator in which the pavement ground cutting device according to the present invention is mounted in place of the bucket includes an arm supported by the traveling body, a piston rod of the hydraulic cylinder, and a bucket connected by a four-link mechanism, and What is necessary is just to comprise so that the bucket may be driven and oscillated up and down by expansion and contraction operation, and may be what is called a power shovel, a loading shovel, etc. other than the backhoe shown in embodiment.

[Brief description of the drawings]

FIG. 1 is a side view of a pavement ground cutting device.

FIG. 2 is a plan view of a pavement ground cutting device.

FIG. 3 is a front view of a pavement ground cutting apparatus.

FIG. 4 is a perspective view of a main part.

FIG. 5 is a side view of a main part showing a cutting method.

FIG. 6 is a side view of a hydraulic excavator.

FIG. 7 is a perspective view of a main part of the excavator.

FIG. 8 is a side view showing the second embodiment.

FIG. 9 is a front view showing a second embodiment.

FIG. 10 is an essential part perspective view showing a third embodiment.

[Explanation of symbols]

 2 Machine frame 3 Disk blade 5 Grounding wheel 10 Attached part 13 Connected part 23 Bucket 31 Arm 35 Bucket attaching part 37 Bucket connecting part 42 Piston rod 45 Auxiliary grounding wheel A Paving ground cutting device B Hydraulic excavator C Paving ground M1 Hydraulic motor P Hydraulic pump S3 Bucket swing hydraulic cylinder X Disk blade rotary shaft

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Keizo Iwao 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Inside Osaka Gas Co., Ltd. (72) Takayuki Baba 3-1-1 Meishinguchi, Meishinguchi, Toyonaka-shi, Osaka No. 1 F-term in Keihantec Co., Ltd. (reference) 2D053 AA26 AB08 AC02 DA03

Claims (4)

[Claims] 1. A pavement ground cutting apparatus for cutting a pavement ground by driving and rotating a disk blade, wherein a bucket provided on an arm of a hydraulic shovel, on a machine frame supporting the disk blade in a freely rotatable manner. At the mounting part,
Instead of the bucket, a mounting portion is provided which is rotatably and detachably mounted around an axis substantially parallel to the disk blade rotation axis, and is provided on a piston rod of a hydraulic cylinder for rocking the bucket of the hydraulic shovel. A pavement ground cutting device, wherein a bucket connecting portion is provided with a connected portion which is rotatably and detachably connected around an axis substantially parallel to the disk blade rotation axis in place of the bucket. 2. A disk blade, comprising: a grounding wheel for mounting the mounted portion to the bucket mounting portion and supporting the machine frame connected to the connected portion to the bucket connecting portion on the ground side; The pavement ground cutting device according to claim 1, wherein the pavement ground cutting device is rotatably supported around a single axis substantially parallel to the disk blade rotation axis at a position radially away from the axis. 3. The pavement ground cutting apparatus according to claim 1, wherein a hydraulic motor for driving and rotating the disk blade is provided so as to be driven by hydraulic oil supplied from a hydraulic pump mounted on the hydraulic excavator. 4. The pavement ground cutting apparatus according to claim 2, further comprising an auxiliary grounding wheel capable of regulating a cutting depth of the pavement ground by the disk blade in cooperation with the grounding wheel.