JPH0513456Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a cutting device for cutting metal scraps generated in various factories, and particularly relates to a cutting device equipped with a rotating cutter.

[Prior Art] Conventionally, as technologies in this type of field, those shown in FIGS. 11 to 13 are known. The outline will be explained below based on the figure.

In FIG. 11, reference numeral 1 represents a frame, and this frame 1 has two rotating shafts 3, 4 parallel to each other, bearings 2,...
Supported through... Each rotating shaft 3, 4 has a disk 5 in which a plurality of blades 5a (FIG. 12) are arranged along the circumferential direction in a portion extending inside the frame 1.
Collars 6 of smaller diameter are alternately externally supported in the axial direction, and each constitutes a rotary cutter A, B as a whole.

In these rotary cutters A and B, the disk 5
The thickness of the collar 6 is equal to that of the collar 6, and when attached to the frame 1, the adjacent discs 5, 5 of one rotary cutter are
The disk 5 of the other rotary cutter is fitted in between. Also, this rotating cutter A,
In B, the distance between the shafts 3 and 4 is set to be 1/2 the sum of the outer diameter of the disk 5 and the outer diameter of the collar 6. As a result, when the rotary cutters rotate, the cutting edge of the blade 5a of the disk 5 in one rotary cutter comes into contact with the outer peripheral surface of the collar 6 in the other rotary cutter.

Furthermore, spur gears 7 and 8 that mesh with each other are attached to one ends of the rotating shafts 3 and 4 that protrude outward from the frame 1, respectively. Further, a motor 10 is connected to the other end of the rotating shaft 3 that projects outward from the frame 1. The rotary cutter A is rotationally driven by the motor 10, and the rotary cutter B is further rotationally driven in the opposite direction to the rotary cutter A through the spur gears 7 and 8.

Incidentally, in the frame 1, comb-shaped fixed blades 12, 12 are disposed outside the disk 5 and the collar 6, and are in contact with both the cutting edge of the blade 5a of the disk 5 and the collar 6.
Further, in this cutting processing apparatus, although not shown, a hopper is attached to the frame 1.

Next, the disk 5 of the conventional cutting apparatus configured as described above will be explained in more detail using FIG. 12.

On the outer periphery of the disk 5, a plurality of blades 5a having the same shape are arranged along the circumferential direction. The cutting edge surface 14a of each blade 5a is formed to coincide with the radial surface of the disk 5. Further, the extending direction of the cutting edge at the tip of the blade 5a in this disc 5 coincides with the extending direction of the generatrix of the disc 5. the result,
When the cutting edge of the blade 5a of the disk 5 in one rotary cutter comes into contact with the outer circumferential surface of the collar 6 in the other rotating cutter, the entire cutting edge of the blade 5a contacts the collar 6 facing the opposite collar 6, as shown in FIG. simultaneously abuts against the outer circumferential surface of the

Next, the operation of this cutting processing device will be explained.

When the motor 10 is driven, the rotational force of the drive shaft is first transmitted to the rotating shaft 3 and the rotating cutter A.
is rotated, and is further transmitted to the rotating shaft 4 through the spur gears 7 and 8, thereby rotating the rotating cutter B. In this case, the rotating directions of the rotary cutters A and B are opposite to each other, and the disc 5
The input material is rotated by the cutting edge 14a of the cutter A,
This is the direction in which it can be drawn between B (12th
(see arrow in figure). Rotating cutter A,
Let it be the positive direction of B.

Here, when the input material is put into the hopper, the input material is loaded on the rear surface 14b of the blade 5a and is drawn between the rotating cutters A and B by the succeeding cutting surface 14a, and the main Rotating cutter A,
It is cut into a predetermined size by the shearing action between the blades 5a at B. The processed material (cutting powder) thus cut is discharged downward through the gap formed between the disk 5 and the collar 6 as the rotary cutters A and B rotate.

Note that the cutting of the input material is also achieved by the interaction between the blade 5a and the collar 6 facing it.

That is, as shown in FIG. 12, for example, when the cutting edge of the blade 5a of the disk 5 in the rotary cutter A comes into contact with the collar 6 in the rotary cutter B,
When a portion of the input material is present at the cutting edge position of the blade 5a, the input material is pushed off by the blade 5a of the rotary cutter A and the collar 6 of the rotary cutter B in this cutting processing device.

By the way, in the above-mentioned cutting processing apparatus, as shown in FIG. 13, it is common that a radius is formed on both sides of the edge of the cutting edge. Otherwise, if the corners on both sides of the cutting edge are sharp, the blade 5a is likely to be damaged.

[Problems to be Solved by the Invention] However, if the corners on both sides of the cutting edge of the blade 5a are rounded as described above, the following problems will occur.

That is, when a roundness is formed on both sides of the cutting edge of the blade 5a, a substantially triangular gap is formed between the rounded portion and the outer peripheral surface of the collar 6 and the side surface of the disk 5. Therefore, for example, when cutting a rubber material, there is a problem that the input material is not cut in the gap portion and the input material after cutting is connected.

The present invention was devised in view of these problems, and an object of the present invention is to provide a cutting device that can reliably cut input materials into small pieces and prevent damage to the blade.

The above and other objects and novel features of this invention will become clear from the description of this specification and the accompanying drawings.

[Means for Solving the Problems] An overview of typical devices disclosed in the present application is as follows.

That is, at least one pair of rotary cutters are provided, each of which is configured by alternately arranging a disk in which a plurality of blades are arranged in the circumferential direction and a collar smaller in diameter than the disk in the axial direction of the rotary shaft. In a cutting device configured so that the disks of the rotary cutters fit into each other, both sides of the cutting edge of the blade of each rotating cutter are rounded, and the shape of the blade receiving portion of the rotating cutter is adjusted to match the cutting edge of the blade. It is constructed so that it has a complementary relationship with .

[Function] According to the above-described function, since the cutting edge of the blade is rounded on both sides, breakage of the blade is prevented and the blade can be protected. On the other hand,
Since the shape of the part that receives the blade is configured to have a complementary relationship with the blade edge,
Since no gaps are formed on both sides of the cutting edge of the blade when cutting the input material, the input material can be reliably cut finely.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a plan view of a rotary cutter of a first embodiment of a cutting device according to the present invention, and FIG.
FIG. 3 is a schematic plan view of the first embodiment of the cutting device according to the present invention,
4 is a front view of the disk in the rotary cutter of FIG. 1, FIG. 5 is a front view of the disk in the rotary cutter of FIG. 1, and FIG. 6 is a side view of the disk.

The first difference between the cutting device of this embodiment and the conventional one (FIGS. 11 to 13) is that, as shown in FIGS. 1 and 2, the blades 22, 23 ( (see Figures 3 and 4) are rounded at both ends of the cutting edge, while the blades 2 of the rotary cutters A and B are rounded at both ends.
The shape of the portion (receiving portion) into which the blades 22 and 23 are fitted is configured to be complementary to the cutting edge edges of the blades 22 and 23.

That is, the blades 22, 23 of this cutting processing device
As shown in FIGS. 1 and 2, the blades 22 and 23 are rounded at both ends, similar to the blades in conventional cutting equipment, to prevent damage to the blades 22 and 23. It's getting old. On the other hand, in this cutting processing apparatus, the disk 21 is configured such that the thickness on the proximal end side is greater than the thickness on the distal end side. Specifically, in the disk 21, the thickness of the portion that abuts the collar 6 is greater than the thickness of the portion that protrudes radially outward from the collar 6.
The shape of the portion where the length changes (step portion) is configured to have a complementary relationship with the roundness given to the blades 22 and 23,
When the blade edges of blades 2 and 23 come into contact with the opposing collars 6, the rounded portions of the blades 22 and 23 come into contact with the stepped portion of the disk 21, as shown in FIGS. 1 and 2. The structure is such that there is no gap between them.

The second difference between the cutting device of this embodiment and the conventional one is that, as shown in FIG. The rotary cutters A and B are rotated independently in the forward and reverse directions, and the load states of the rotary cutters A and B are detected by the detection devices 32, 32, respectively, and the control devices 33,
33 controls the rotation direction of the rotary cutters A and B or stops the operation of the motors 31 and 31, respectively.

That is, in the cutting processing apparatus of this embodiment, as the detection device 32, for example, a rotation detection device that can sequentially detect the amount of rotation of a rotary cutter within a predetermined period of time is used. On the other hand, the control device 33 normally controls the motor 3.
1 in the forward direction (direction for cutting), and if the amount of rotation of the rotary cutter gradually decreases within a predetermined time, it is determined that the input material is clogged, and the motor 3 is rotated.
1 in the opposite direction for a predetermined period of time to eliminate the blockage, and then rotate the motor 31 in the forward direction again. If the rotation amount of the rotary cutter decreases steeply within the predetermined period of time, it is determined that hard foreign matter has become clogged. When it is determined that this is the case, the operation of the motor 31 is immediately stopped.

Furthermore, the third point in which the cutting-type processing device of this embodiment differs from that of the conventional one is that, as shown in FIGS.
The blades 22 having a small cutting surface 23a and the blades 23 having a large cutting surface 23a are alternately arranged.

That is, in the disk 21 of the embodiment, the blade 2
The central angles of 2 and 23 are changed (θ ₁ ,
θ ₂ ), the rear surface 22b of the blade 22 is formed to be larger than the rear surface 23b of the blade 23. Further, in this cutting processing device, the blade 22 of the disk 21,
The cutting edge 23 is formed so as to be inscribed in a virtual cylinder circumscribing the collar 6.

Further, the cutting device of the embodiment differs from the conventional one in that a cylindrical metal is provided inside the bearing 2. Here, the cylindrical metal has a function of supplementing the bearing action of the bearing 2, and also has a function of preventing dust and the like from adhering to the bearing 2.

For other configurations, see Figures 11 to 13.
It has substantially the same configuration as the conventional cutting processing apparatus shown in the figure. Therefore, for the same elements, the first
The same reference numerals as in FIGS. 1 to 13 are used, and the explanation thereof will be omitted.

Next, the operation of the cutting device configured as described above will be explained.

For example, if you input input materials of different sizes,
The relatively small input material is placed on the rear surfaces 22b and 23b of the blades 22 and 23, and is drawn between the rotating cutters A and B by the cutting surfaces 23a and 22a of the following blades 23 and 22, and is rotated. Cutting is performed by the interaction between the blades 22 and 23 of the cutters A and B and the interaction between the blades 22 and 23 and the collar 6. On the other hand, the blade 23
Large input materials or deformed input materials (for example, curled metal scraps) that float on the rear surface 23b and cannot be drawn between the rotating cutters A and B by the cutting edge surface 22a are placed behind the blade 22. Back side 22
The cutter 23b is carried to the cutting position by the large cutting surface 23a, and cut by the interaction of the rotary cutters A and B.

During this cutting, the load conditions of the rotary cutters A and B are detected by the detectors 32, 32, respectively. If, for example, the material being fed is jammed, the controller 33 issues a control signal to the motor 31, which then stops and then rotates in the reverse direction for a predetermined period of time, thereby pushing the jammed material back upward.
The jam is cleared. Then, after a predetermined time has elapsed, the motor 31 is rotated in the forward direction by a signal from the control device 31, and the input material is cut again. On the other hand, if a hard foreign object is jammed between the rotating cutters A and B, the motor 31 is stopped.

According to the cutting apparatus of the embodiment configured as described above, the following effects can be obtained.

That is, according to this cutting processing device, the blade 2
Since the blade edges of the blades 2 and 23 and the shapes of the portions that receive the blades 22 and 23 are complementary, gaps are not formed on both sides of the blade edges of the blades 22 and 23 during the cutting process of the input material. By this action, it is possible to prevent the uncut material from falling, and it is also possible to reliably cut the input material finely at both ends of the cutting edges of the blades 22 and 23.

Moreover, according to this cutting processing device, since the disk 21 having two types of blades 22 and 23 of different sizes on the outer periphery is used, it is possible to reliably and efficiently cut materials even with large and small or deformed materials, and the motor 3
1. Cutting can be done easily without putting too much load on the shafts 3, 4, etc. Note that this effect can be obtained even when three or more types of blades are used.

Furthermore, according to this cutting processing device, each load condition of the rotary cutters A and B is constantly detected, and the rotation direction of the motor 31 is changed according to the detection result, so that clogging of the input material can be prevented in advance. This can be prevented or canceled after the fact, and the input material can be cut efficiently without placing any additional load on the motor 31. In addition, if the load on only one rotating cutter becomes large, and as a result, one rotating cutter rotates in the forward direction and the other rotating cutter rotates in the opposite direction, the rotating cutter rotating in the opposite direction will The floating state of the input material is changed by the disk 21, and the input material can be cut by the disk 21 of the other rotary cutter, which rotates in the forward direction of the disk 21, thereby making it possible to cut the input material more efficiently.

Further, according to this embodiment, each detection device 32 sequentially detects the amount of rotation within a predetermined period of time, and if the decrease in the amount of rotation is steep, it is assumed that hard foreign matter is mixed in the input material. Since the motor 31 is stopped, the motor 31 is not repeatedly reversed due to hard foreign objects, and by removing the foreign objects, it becomes possible to immediately process the input materials. As a result, processing efficiency is further improved. This also prevents damage to the blades in the disk 21.

Next, a second example will be described.

The cutting device of the second embodiment is different from that of the first embodiment in that the cutting edge of the blades 22 and 23 is inclined with respect to the generatrix of the disk 21, as shown in FIGS. 7 to 9. This is what we are doing.

Therefore, in the cutting device of this embodiment, the cutting edges of the blades 22, 23 of the disk 21 in one rotary cutter are brought into point contact with the collar 6 of the other rotary cutter, and as the rotary cutter rotates, the blades The point contact position between the blade edges 22 and 23 and the collar 6 is shifted in the axial direction of the rotary cutter.

As a result, in this cutting processing device, the blades 22 and 2 of the disk 21 in one rotary cutter are
An input material is interposed between the collar 6 of the rotary cutter 3 and the other rotary cutter, and the input material is also inserted into the blade 2.
In the case where the blades 22 and 23 of the disk 21 in one rotary cutter are present at the cutting edge positions 2 and 23, the cutting edge has a complementary relationship with the collar 6 and both ends of the blade edge in the other rotating cutter. cut off by. In other words, the blades 22, 2 of the disk 21 in one rotary cutter
As the rotary cutter rotates, the point contact position between the cutting edge of No. 3 and the collar 6 or cut portion of the other rotary cutter moves in the axial direction of the rotary cutter, thereby cutting the input material.

According to the cutting device of the second embodiment, it is possible to obtain the same effects as in the first embodiment, and the cutting edge of the blades 22 and 23 of the disk 21 in one rotary cutter and the other While making point contact with the collar 6 of the rotating cutter,
As the rotary cutter rotates, the point contact position between the cutting edges of the blades 22 and 23 of the disk 21 of one rotary cutter and the collar 6 of the other rotary cutter is moved in the axial direction of the rotary cutter to remove the input material. Since the material is pulled out, it is easy to cut the input material. As a result, it becomes possible to cut the input material finely and efficiently without putting too much load on the motor 10 and the like. In particular, in this case, when cutting the input material, the input material escapes in the direction in which the point contact position changes. It is effective to maintain a complementary relationship.

Although the invention made by the present invention has been specifically explained based on the examples above, the present invention is not limited to the above-mentioned examples, and it should be noted that various changes can be made without departing from the gist of the invention. Not even.

For example, in the above embodiment, the blades 22, 23
In order to create a complementary relationship between the shape of the blade edge and the shape of the receiving portion, the thickness of the distal end and the proximal end of the disc 21 is changed.As shown in FIG. Both sides may be bulged to correspond to the rounded portions of the blades 22 and 23.

It goes without saying that the present invention can also be applied to a conventional cutting device having a disk 21 in which blades of the same shape are arranged in the circumferential direction.

[Effects of the Device] The effects obtained by the typical devices disclosed in this application are briefly explained below.

In other words, in a cutting and processing device provided with at least one pair of rotary cutters each consisting of a disk having a number of blades arranged in a circumferential direction and a collar having a smaller diameter than the disk, which are alternately arranged in the axial direction of a rotating shaft, and in which the disks of a pair of rotary cutters are configured to fit together, both sides of the cutting edge of the blade of each rotary cutter are rounded, and the shape of the blade receiving portion of the rotary cutter is configured to be complementary to the cutting edge of the blade, thereby preventing the uncut material from falling and ensuring that the input material is shredded.

Incidentally, it goes without saying that the present invention can also be used to treat not only metal scraps but also meat, wood, fruit, empty cans, bottles, plastics, and the like.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a rotary cutter used in a first embodiment of a cutting device according to the present invention, FIG. 2 is a cross-sectional plan view of the rotary cutter, and FIG. 3 is a cutting device according to the present invention. A schematic plan view of the first embodiment of
FIG. 4 is a front view of the rotary cutter, FIG. 5 is a front view of a disk in the rotary cutter, FIG. 6 is a side view of the disk, and FIG. 7 is a second embodiment of the cutting device according to the present invention. A front view of the rotary cutter used in the example, FIG. 8 is a front view of the disk in the rotary cutter, FIG. 9 is a side view of the disk, and FIG. 10 is a cross-sectional plane of the rotary cutter according to a modification of the present invention. 11 is a schematic plan view of a conventional cutting device, FIG. 12 is a front view of a rotary cutter in a conventional cutting device, and FIG. 13 is a plan view of a rotary cutter in a conventional cutting device. 3, 4...Shaft, 6...Color, 21...
Disc, 22, 23... Blade, A, B...
Rotating cutlet.

Claims (1)

[Scope of utility model registration request] At least one pair of rotating cutters are provided, each of which is configured by alternately arranging a disk formed by a plurality of blades arranged in the circumferential direction and a collar smaller in diameter than the disk in the axial direction of the rotating shaft,
In a cutting device configured so that the discs of a pair of rotating cutters fit into each other, both sides of the cutting edge of the blade of each rotating cutter are rounded, and the shape of the blade receiving portion of the rotating cutter is adjusted to the cutting edge of the blade. A cutting device characterized in that it is configured to have a complementary relationship with an edge.