JPH0641776Y2 - Cutting device for scrap metal - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a cutting device for scrapping metal waste used for dismantling a structure such as an automobile, a ship, or a building.

[Conventional technology and its problems]

Conventionally, as a cutting device of this type, there has been known a cutting device (for example, Japanese Utility Model Laid-Open No. 60-91311 and Japanese Utility Model Laid-Open No. 60-134512) which has been previously disclosed by the present inventor. Such a cutting device has a basic structure in which a fixed blade and a movable blade are slidably attached to each other, and a large fluid pressure cylinder is connected to a base end portion of the movable blade. Although it is possible to reliably cut a relatively large-sized metal waste material, it has the following drawbacks.

First of all, since the movable blade is directly pressed by the fluid pressure cylinder in the direction of the fixed blade to slidably and the required metal waste material is cut, the pressing force at the time of cutting is uneven, that is, At the time of cutting, the pressing force gradually weakens depending on the blade tip from the blade edge, and in the case of large metal waste materials, smooth cutting is not always easy.

Secondly, since only the movable blade is actuated and the fixed blade is slid, the smooth scraping operation of the waste metal material during the dismantling work is difficult.

Third, since a large fluid pressure cylinder is used, not only the size of the device itself is increased, but also the power cost is increased.

In Japanese Utility Model Application Laid-Open No. 52-5385, a long lever arm is connected to each of a pair of cutting blades, and a tip end portion of each lever arm is provided with an articulated link mechanism. A cutting device is shown in which the operating rods are connected. Since the cutting device operates the cutting blade by the actuating rod via the articulated link mechanism and the lever arm, the cutting force can be increased, but the structure becomes very complicated and the device is complicated. Not only is it easy to increase in size, but its production is cumbersome and time-consuming, resulting in an increase in cost as a whole. Also, since the pair of cutting blades are operated by one operating rod via the link mechanism and the lever arm, only a uniform pressing force can be applied to each cutting blade at all times, and the partial When cutting waste metal materials with different hardness, it was easy to get caught in a large part of hardness, and smooth cutting was very difficult.

[Means for solving problems]

SUMMARY OF THE INVENTION The present invention is intended to solve all the conventional problems, and a pair of cutting blades 3 are slidably attached to a holder 1 via a bearing member 2 and a base end of each cutting blade 3 is attached. Link mechanisms 5 each of which is composed of a crank 7 and a connecting node 6 having the holder 1 as a fixed node are connected to the outer side portions, and a pivotally connecting portion between the crank 7 and the connecting node 6 forming each of the link mechanisms 5 is connected. The fluid pressure cylinders 8 are connected to each other.

[Action]

While appropriately adjusting the pressing force of the fluid pressure cylinder 8, the pair of cutting blades 3 is operated in the sliding direction by a so-called lever action via the link mechanism 5 including the crank 7 and the connecting node 6 having the holder 1 as a fixed node. , The required metal waste can be cut smoothly and surely.

〔Example〕

An embodiment of the present invention shown in the drawings will be described below.

In FIGS. 1 to 3, 1 is a holder having a pair of bearing members 2 on both sides at its tip, and 3 is a shaft 4 between the bearing members 2.
A pair of cutting blades 5 which are slidably attached to each other via a pair of linking mechanisms 5 each having a holder 1 as a fixed node, and a connecting node 6 which constitutes each linking mechanism 5 is a base end outside of the cutting blade 3. And the crank 7 are pivotally mounted inside the base end of the bearing member 2. Reference numeral 8 is a small hydraulic cylinder connected to a pivotally connecting portion between each of the connecting nodes 6 and the crank 7, and 9 is a fixture provided at the base end portion of the holder 1. Other, 10
Is a base machine, and 11 is an articulated arm that is erected on the base machine 10 so as to be rotatable and bendable.

As shown in FIG. 3, the cutting device configured as described above is attached to the tip of an articulated arm 11 erected on the base machine 10 via a fixture 9 to cut a required metal waste material. Perform dismantling work. That is, as shown in FIG. 1, a required metal waste material to be cut such as an automobile chassis is gripped with the pair of cutting blades 3 being opened. Then, when the hydraulic cylinder 8 is actuated, the link mechanism 5 pushes the cutting blade 3 in the sliding direction while the connecting node 6 rotates outward with the holder 1 as a fixed node to slide the metal waste material. Disconnect. At this time, the hydraulic cylinder 8 is connected to the link mechanism 5.
Since the cutting blade 3 is pressed in the sliding direction through the blade, not only the cutting can be performed with a small pressing force by a so-called lever action, but also the connecting node 6 constituting the link mechanism 5 is rotated outward. While pressing the cutting blade 3 in the sliding direction, the pressing force can be gradually increased toward the cutting edge from the cutting edge of the cutting blade 3, and cutting can be performed smoothly and surely. . Further, since the pair of cutting blades 3 are each movable in the direction in which they are slid together, the operation of gripping the waste metal material can be performed smoothly. In addition, when cutting a metal waste material having a partially different hardness, the pressing force of each hydraulic cylinder 8 is appropriately changed to thereby appropriately adjust the cutting force of the corresponding cutting blade 3 alternately while cutting. It is good to be busy.

Similarly, while operating the hydraulic cylinder 8, the cutting blade 3 is slid through the link mechanism 5 to cut the required waste metal material.

In the above embodiment, it goes without saying that a fluid pressure cylinder such as an air cylinder may be used instead of the hydraulic cylinder 8.

[Effect of device]

According to the present invention, the pair of cutting blades 3 are slidably attached to the holder 1 via the bearing member 2 according to the above, and the holder 1 is attached to the outer side of the proximal end of each cutting blade 3. A link mechanism 5 including a crank 7 and a connecting node 6 serving as a fixed node is connected to each other, and a fluid pressure cylinder 8 is connected to a pivotally connecting portion between the crank 7 and the connecting node 6 forming each link mechanism 5. Therefore, the pair of cutting blades 3 are directly moved by the so-called lever action via the link mechanism 5 including the crank 7 and the connecting joint 6 with the holder 1 as the fixed joint by the fluid pressure cylinder 8.
Can be operated in the slicing direction, the waste metal material can be cut with a small pressing force, and thus the device can be constructed extremely compact, and the link mechanism 5 Since the connecting node 6 which constitutes is pressing the cutting blade 3 in the sliding direction while rotating outwardly, the pressing force of the cutting blade 3 gradually increases from the blade base toward the blade tip, and the cutting is smoothly and It can be done reliably. Further, when cutting a metal waste material having a partially different hardness, by appropriately changing the pressing force of each fluid pressure cylinder 8, the cutting force of the corresponding cutting blade 3 is alternately adjusted appropriately while cutting. Is what you can do. Furthermore, since the pair of cutting blades 3 are each movable in the direction in which the scraping is performed, compared to the conventional example in which the fixed blade and the movable blade are configured to be slidable, the metal scrap material can be gripped during cutting work. The operation can be performed extremely smoothly.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a partially cutaway side view, FIG. 2 is a plan view of the same, and FIG. 3 is a side view showing a state of use. 1 ... Holder, 2 ... Bearing member, 3 ... Cutting blade, 5 ...
Link mechanism, 6 ... connecting node, 7 ... crank, 8 ... hydraulic cylinder.

Claims (1)

[Scope of utility model registration request] 1. A pair of cutting blades 3 are axially attached to a holder 1 via bearing members 2 so as to be slidable, and each of the cutting blades 3 is mounted.
Crank 7 with holder 1 as a fixed node on the outer side of the base end of
The link mechanisms 5 each including the connecting node 6 are connected to each other, and
A cutting device for scrap metal or the like, in which a fluid pressure cylinder 8 is connected to a pivotally connecting portion between a crank 7 and a connecting node 6 which constitute each link mechanism 5.