JPS5826739Y2 - Attachment for cutting reinforcing bars - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a reinforcing bar cutting attachment that is attached to an operating arm of a hydraulic excavator or the like.

BACKGROUND ART Conventionally, there have been known devices that are attached to a main body machine such as a hydraulic excavator as an attachment to crush concrete, cut reinforcing steel, etc. when demolishing a building.

However, conventional attachments of this type generally have a very complicated structure and must be attached to the main machine via a special connection mechanism or link mechanism, which makes the installation process extremely troublesome. In addition, a dedicated hydraulic cylinder is built in to drive the button, which requires separate dedicated hydraulic piping, which not only complicates the configuration, but also requires the above-mentioned piping to be installed around the moving parts. As a result, this piping is likely to get stuck or collide with reinforcing steel or concrete, causing damage or breakage.Furthermore, the weight of the attachment, which has an extremely huge weight, is further increased by the built-in hydraulic cylinder. However, there were disadvantages in that a great deal of work was required to attach and detach the actuating arm, and the danger increased significantly.

The reinforcing bar cutting attachment of the present invention was developed in view of the above, and has a very simple and lightweight structure that allows it to be easily installed on the main machine, and is driven by a hydraulic cylinder common to other attachments. It is characterized by what one does in order to obtain it.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. As shown in FIG. 1, the cutting attachment 1 of the present invention includes a cutter base 2 and a cutter arm 3,
These are rotatably connected by fitting the pivot portion 5 of the cutter arm 3 between the left and right side walls 48 of the pivot portion 4 provided on the cutter base 2, and pivotally supporting both by a pace pivot 6. ing.

Opening/closing part 2 of the cutter base 2 and cutter arm 3
a and 3a are provided with cutting blades 7, 7 which are replaceably attached to the base side by set screws 8, and clamping parts 9, 9 with roughened surfaces are provided at the tips; , a pair of arm fixing plates N1.11 facing each other vertically, and a side locking wall 12 against which the side surface of the tip end of the actuating arm 15 (described later) comes into contact, and the locking wall 12 is provided with a pin hole 12a.
A fixing connecting part 10 is formed by providing a fixing connecting part 10, and a driving connecting part 13 with a pin hole 14 is formed in the cutter arm 3 so as to form an abbreviated shape with respect to the opening/closing part 3a. ing.

FIG. 2 shows a hydraulic excavator as the main machine to which the cutting attachment 1 is attached, and a packet 16 as shown is usually attached to the tip of the operating arm 15 of this hydraulic excavator.

That is, the support connecting portion 16a of the packet 16 is removably pivoted to the tip of the actuating arm 15 by a removable attachment pin 17;
A driving connecting portion 16b of the packet 16 is removably connected to the rod 18a of the u-reduced hydraulic cylinder 18 via a link mechanism 19 by a mounting pin 20.

The link mechanism 19 consists of a pair of left and right driving links 19a and supporting links 19b connected to each other by connecting pins 21. The tip of the driving link 19a is connected to the packet 16, and the supporting link 19b The other end is rotatably connected to the operating arm 15 by a pivot 22, and the rod 18a is further connected to the connecting pin 21.

In the figure, 17a and 17b are locking bolts and nuts for preventing the attachment pin 17 from coming off, and 20a and 20b are similar locking bolts and nuts for the attachment pin 20.

When attaching the cutting attachment 1 described above to the operating arm 15 of the main machine, first, the mounting pins 17 and 20 pivotally attached to the operating arm 15 and the drive link 19a are locked. By removing and pulling out the ports 17a and 20a, the packet 16 is removed as shown in FIG.

Once the packet 16 is removed, the cutting attachment 1
is placed in front of the actuating arm 15, and first, the tip of the actuating arm 15 is inserted between the upper and lower arm fixing plates 11, 11 in the fixing connection part 10 of the cutter base 2, and the side surface thereof is inserted into the locking wall. The cutter base 2 and the operating arm 15 are fixedly connected by abutting and engaging the cutter base 2 and the operating arm 15 by inserting a mounting pin 17 common to the packet 16 into the pin hole 12a.

Next, the driving connecting portion 13 of the cutter arm 3 is inserted between the pair of left and right driving links 19a19a, and the mounting pin 20, which is common to the case of the packet 16, is inserted into the pin hole 14.
The cutter arm 3 is connected to the link mechanism 19 by inserting the cutter arm 3 into the link mechanism 19 .

Thus, the cutting attachment 1 connected to the operating arm 15 as shown in FIG. 4 is used for cutting and transporting reinforcing bars and light steel frames in building demolition work, etc. The reinforcing bar or the like can be sandwiched between the cutting blades 7, 7 of the cutter base 2 and the cutter arm 2, and the cutter arm 3 can be cut by rotating the cutter arm 3 forward with the hydraulic cylinder 18 via the link mechanism 19. By driving the cutter arm 3 in the same manner, the twisted or cut reinforcing bars, etc. are held in the clamping part 9,
It can be transported by being held between 9 pieces.

The cutting attachment 1 can be easily replaced with the packet 16 by inserting and removing the two mounting pins 17 and 20 as described above.

According to the cutting attachment of the present invention having the above configuration, it does not have its own dedicated hydraulic cylinder for driving, but uses a common hydraulic cylinder with other attachments installed on the operating arm of the main machine. Since it is configured to be used for the drive, the structure is not only very simple and lightweight, but also there is no need to newly install dedicated piping for the drive, and therefore it is easy to attach and detach from the main machine. Not only is the work extremely easy, it also eliminates accidents such as damage or cutting caused by pipes getting stuck or colliding with reinforcing bars or concrete, etc. In addition, the cutter base is fixed to the operating arm. Since only the cutter arm is driven by the hydraulic cylinder, there is no need to provide special members or link mechanisms for connecting and driving them, and the structure and connection can be greatly simplified. .

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing an embodiment of the cutting attachment according to the present invention, Fig. 2 is a perspective view of the main part of the hydraulic excavator as the main machine, and Fig. 3 is a perspective view of the main part with the packet removed. FIG. 4 is a perspective view of the main part with a cutting attachment attached instead of the packet. 1...Cutting attachment, 2...
Cutter base, 3... Cutter arm, 7.
... Cutting blade, 9 ... Clamping part, 10 ...
...Fixing connection part, 13...Driving connection part, 1
5... Operating arm 16... Packet, 18... Hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] A cutting blade for cutting reinforcing steel and a clamping part for reinforcing steel etc. are provided on the cutter base and the cutter arm which are rotatably connected, and the cutter base is used for fixation that can be fixedly connected to the operating arm of the main machine such as a hydraulic excavator. While forming a connecting part,
The cutter arm is provided with a driving connection part that can be connected to a hydraulic cylinder that is attached to the operating arm of the main machine and used to drive attachments such as packets, and the hydraulic cylinder is used as a driving source for the cutter arm. Attachment for cutting reinforcing bars.