JPH0555641B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pavement peeling and crushing machine used for repair work of roads paved with asphalt, etc.

[Conventional technology and its issues]

Generally, asphalt replacement work is performed when asphalt pavement is severely damaged and a good road surface cannot be maintained with maintenance methods or other repair methods, or when ancillary structures need to be repaired. One of these works involves stripping off the pavement, using a pavement stripping and crushing machine. Various types of such pavement peeling and crushing machines have been proposed and implemented, one of which is the pavement peeling and crushing machine described in Japanese Patent Publication No. 59-3003 and Japanese Patent Application Laid-Open No. 59-34307. It is being For example, JP-A-59
In the model described in Publication No. 34307, the shovel belt attached to the tip of the boom of the power shovel is removed, and a pavement peeling and crushing machine as an attachment is attached in its place. Two arc-shaped peeling claws with sharp points are fixed to the main body in parallel, and an arc-shaped crushing claw is provided between these peeling claws and is rotatably attached to a pivot supported by the main body. A sharp part is also provided at the distal end, and a swinging arm is extended to the proximal end.
The structure is such that this swing arm is interlocked with a hydraulic cylinder built into the main body. Therefore, after aligning the sharp parts of the two peeling claws and one of the crushing claws and applying them between the asphalt and the ground, the boom is operated to bite, and then the crushing claw When the chisel is rotated away from the ground, the two stripping claws act as legs, and the sharp part of one crushing claw lifts and strips the asphalt. in this case,
Since the two peeling claws act as legs to rotate the crushing claws, in other words, serve as support points for the lever, a small hydraulic cylinder capacity is required.

However, in such a pavement peeling and crushing machine, 2
After aligning the sharp parts of the book peeling claw and one of the crushing claws, the boom is operated to forcibly bite the sharp parts between the asphalt and the ground, which requires a large amount of power and, as a result, reduces noise. There was a big problem.

In addition, the crushing claws are formed with sharp parts to have the function of biting into the gap between the asphalt and the ground, and the function of crushing the asphalt pieces that are removed and caught between them. In order to perform this function, it is necessary to make the crushing claw slender, and in order to perform the crushing function, it is necessary to make the crushing claw thick. Another problem was that it was difficult to design.

[Means to solve the problem]

Therefore, the present invention was created in an attempt to solve these problems all at once, and the gist thereof is to provide a self-propelled construction machine equipped with a boom, which is detachably attached to the tip of the boom 2. In the pavement peeling and crushing machine 6, the main body 9 of the pavement peeling and crushing machine 6 is configured in a box shape, and two peeling claws 10, 10 are integrally provided on the main body 9 and extend toward the boom base side, The tips of these peeling claws 10 are attached to the sharp member 10.
a, a through hole 18 is formed in the middle of these peeling claws 10, a crushing claw 19 without a sharp part enters and exits into the through hole 18, and a pivot 20 supported by the main body 9. The crushing claw 19 is rotatably supported, has a crushed piece placement part on the upper surface of the distal end side, crushes crushed pieces on the lower surface of the distal end side, and
In addition, the base side of the crushing claw 19 is connected to the outside of the main body 9 via a link mechanism 23, and a contact portion is formed for contacting the sharp member 10a with the ground when the sharp member 10a is applied between the paved roadbed and the ground. The pavement peeling and crushing machine is characterized in that it is interlocked and connected to a hydraulic cylinder 22 provided in the pavement.

[Effect]

Link function 23 by expanding and contracting the hydraulic cylinder 22
The crushing claws 19 are rotated through the two peeling claws 1.
0 in the middle through hole 18. Next, the sharp member 10a of the peeling claw 10 is attached to the pavement base 7 and the ground 8.
After applying it between the two, press it in slightly. After that, the hydraulic cylinder 22 is extended, and the crushing claw 19
When the contact part of the boom 2 is rotated and pressed diagonally downward in the direction of the tip of the boom 2 on the ground 8, the reaction force causes the peeling claw 10 to
The sharp member 10a slightly digs into the pavement base 7 while lifting it. Next, when the hydraulic cylinder 22 is contracted, the crushing claw 19 is rotated counterclockwise, and the peeling claw 10 is rotated clockwise so as to be brought into contact with the ground 8. Then, when the crushing claws 19 continue to rotate counterclockwise, the lifted pavement roadbed 7 is further lifted and the peeling progresses significantly. Then, the peeling claw 10 is further bitten by the operation of the boom 2.

Thereafter, the crushing claws 19 are removed from the paved roadbed 7, so when the hydraulic cylinder 22 is extended, the crushing claws 19 rotate clockwise to remove the pavement roadbed 7 placed on the two peeling claws 10. crush.

〔Example〕

1 to 4 show embodiments of the present invention. In the figure, 1 is the power shovel body, 2 is the power shovel body 1 and the hydraulic cylinder 3.
4 is a drive arm rotatably connected to the tip of the boom 2, which is raised and lowered by a hydraulic cylinder 5 attached to the boom 2. Reference numeral 6 denotes a pavement peeling and crushing machine having an attachment attached to the tip of the drive arm 4, which peels the asphalt 7 from the ground 8 as shown in FIG. Reference numeral 9 denotes a box-shaped main body, and two tapered peeling claws 10 are integrally extended from the main body 9. This main body 9 is integrally attached and fixed to the tip of the drive arm 4 by pins 11, 11.
The main body 9 also has a connecting member 10a having a sharp portion 10a connecting the side plate members 12, 12 to the plurality of outer plate members 13, 14, 15 and the two peeling claws 10.
It is connected and fixed by 6, and there is a through space 1 at the top.
7 is formed, and a through hole 180 is formed between the two peeling claws 10. Reference numeral 19 denotes a crushing claw rotatably mounted in the penetration space 17 of the main body 9 by a pivot 20 supported by the main body 9. It is supported opposite to these peeling claws 10 so that it can go in and out of the holes 18. 22
is a hydraulic cylinder attached to the drive arm 4, and this hydraulic cylinder 22 opens and closes the crushing claw 19, that is, rotates it, via a link mechanism 23. Reference numeral 24 denotes a predetermined triangular rotating member constituting the link mechanism 23. This rotating member 24 is pivotally attached to the upper end of the main body 9 by a pivot 25, and the above-mentioned hydraulic cylinder is connected to the acute-angled apex 24a of the rotating member 24. The tips of the 22 rods 26 are connected via a pivot pin 27. 28 is a link of a predetermined length, and both ends of this link 28 are connected to pins 29,
30 to the acute-angled top 24 of the pivot member 24
b and the corner portion 31 of the crushing claw 19, respectively.

The crushing claw 19 has a triangular shape in side view as shown in FIG. The asphalt piece 7a is lifted at the other corner side, and the asphalt piece 7a is also crushed. Therefore, the end of the tip 21 of the corner where this crushing is performed is the surface 2.
1a, and no sharp part for biting is formed.

Next, a procedure for peeling the asphalt 7 from the ground 8 using the pavement peeling and crushing machine 6 will be explained.

First, actuate the hydraulic cylinder 22 to release the rod 2.
6 is extended, the rotating member 24 of the link mechanism 23 is rotated counterclockwise about the pivot 25, and the entire link 28 is pushed down, whereby the pivot 20
The crushing claw 19 is rotated in the closing direction (clockwise) using as a fulcrum. As shown in FIG. 1B and FIG.
Once located in the through hole 18 between the asphalt 7 and the ground 8, the crushing claw 19 stops rotating, and then the boom 2 and drive arm 4 are activated to insert the sharp part 10a of the peeling claw 10 between the asphalt 7 and the ground 8. It takes a little bit of guessing.

(For initial peeling, see Figure 4B) Next, extend the hydraulic cylinder 22 and rotate the tip 21 of the crushing claw 19 toward the ground 8 (clockwise).
and press it against the ground 8 through the through hole 18. That is, when the peeling claw 10 is turned diagonally backward (to the left in the figure), the sharp member 10a of the peeling claw 10 moves slightly toward the base of the boom 2 while lifting the asphalt 7 and bites into it.

(For secondary peeling, see Figure 4 C) Next, when the hydraulic cylinder 22 is retracted, the rotating member 24 rotates clockwise about the pivot 25,
The entire link 28 is moved upward. the result,
The crushing claw 19 is rotated counterclockwise, and the peeling claw 10 is rotated clockwise so as to be brought into contact with the ground 8. Then, when the crushing claw 19 continues to rotate counterclockwise, the asphalt 7 is further lifted upward and secondary peeling is performed.

Therefore, through a series of peeling operations including initial peeling and subsequent secondary peeling, the asphalt 7 is completely peeled off to a large extent to form asphalt pieces 7a.

(Refer to Figures 4 D and C for crushing) When the asphalt 7 is completely peeled off to form asphalt pieces 7a, following the above operation, the opened peeling claw 10 is activated by the boom as shown in Figure 4 D. After further biting and intrusion, the cylinder rod 26 of the hydraulic cylinder 22 is extended again, the rotating member 24 is rotated counterclockwise about the pivot 25, and the link 28 is pushed down, as shown in FIG. As shown, the crushing pawl 19 is rotated in the closing direction (clockwise), and the peeling roadbed 7a is held between the peeling pawl 10 and the crushing pawl 19, and the crushing force is used to further crush it into small pieces.

〔Effect of the invention〕

According to the present invention, the following effects can be achieved.

After the sharp member 10a of the peeling claw 10 slightly bites between the asphalt 7 and the ground 8, the lever or reaction force caused by the crushing claw 19 touching the ground causes the peeling claw 10 to peel and bite. , unlike the digging caused by boom operation, requires less power and generates less noise. Therefore, it is possible to provide construction machinery that does not cause trouble to residents along the walkway.

Since the crushing claws do not have a biting function, they can be constructed with a thick wall and have rigidity, allowing good crushing and ground contact.

Since the hydraulic cylinder 20 is not built into the box-like main body, the pavement peeling and crushing machine as an attachment can be constructed to be lightweight and compact, and can be easily attached to and detached from road construction machines.

Since peeling is performed in multiple stages of initial peeling and secondary peeling, there is no forced peeling, and the amount of peeling becomes large, improving work efficiency.

[Brief explanation of the drawing]

Figures 1A, 2B, and 1C show side views of the pavement peeling and crushing machine according to the present invention. Figure 1A shows the crushing claws in an open state, and Figure 1B shows the crushing claws in a closed state. FIG. 1C shows a state in which the crushing claw intersects with the peeling claw. FIG. 2 is a perspective view of the pavement peeling and crushing machine, and FIG. 3 is a plan view of the peeling claw. FIG. 4 is an explanatory diagram showing exfoliation and crushing procedures. 4... Drive arm, 9... Main body, 10... Peeling claw, 18... Through hole, 19... Crushing claw, 21...
Tip part, 22...hydraulic cylinder, 23...link mechanism.

Claims (1)

[Claims] 1. In a self-propelled construction machine equipped with a boom, in a pavement peeling and crushing machine 6 detachably attached to the tip of the boom 2, a main body 9 of the pavement peeling and crushing machine 6 is attached to a box. Two peeling claws 10, 10 are integrally provided on the main body 9 and extend toward the boom base side, and these peeling claws 1
0 to each other with a sharp member 10a, and a through hole 18 is formed in the middle of these peeling claws 10.
A crushing claw 19 without a sharp part that enters and exits the through hole 18 is rotatably supported by a pivot shaft 20 supported by the main body 9, and a crushed piece mounting portion is provided on the upper surface of the distal end side of the crushing claw 19. A contact portion is formed on the lower surface of the distal end side of the blade to crush the crushed pieces, and the sharp member 10a of the peeling claw 10 is brought into contact with the ground when it is applied between the paved roadbed and the ground, and the crushing claw 1
A pavement peeling and crushing machine characterized in that a base side of the main body 9 is interlocked and connected to a hydraulic cylinder 22 provided outside the main body 9 via a link mechanism 23.