JP2003274750A - Rotary blade for cutter and general-purpose cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary blade for a cutter with which the cutting efficiency of a material to be cut is raised and yet the material to be cut is cut in a state for ready composting and a general-purpose cutter. <P>SOLUTION: The edge 50C of the rotary blade 50 to be used for the general- purpose cutter is inclined by a fixed angle to an stationary blade so as to readily cut the material to be cut. In this case, the material to be cut has a tendency of leaving in the inclination direction in cutting, however, in the invention, since the edge 50C is equipped with a plurality of recessed grooves 66 at fixed intervals, the material to be cut is caught by the recessed grooves 66 and surely cut. Consequently, the cutting efficiency of the material to be cut is raised. Furthermore, since the material to be cut is cut in a state being caught by the recessed grooves 66, the material to be cut is finely cut as it is torn off. Consequently, the cut material is readily composted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary blade for a cutter and a general-purpose cutter which are paired with a fixed blade and used for cutting an object to be cut.

[0002]

2. Description of the Related Art Conventionally, there is a general-purpose cutter capable of cutting various objects to be cut. For example, general purpose cutters are used to cut straw or grass and produce feed for livestock such as cattle. Further, this type of general-purpose cutter is often used for composting by cutting pruned twigs and the like.

The above-mentioned general-purpose cutter has a cutting mechanism for cutting an object to be cut, which is also called the heart of the general-purpose cutter. Explaining an example of the structure of the cutting mechanism, the main shaft is rotatably supported by bearings installed on the machine body and rotates around the axis by the driving force of the motor, and the main shaft is fixed to both ends of the main shaft and rotates integrally with the main shaft. A rotating disk, a pair of rotating blades that are spanned between the pair of rotating disks and rotate integrally with the rotating disk, and a fixed blade that is arranged close to the rotation path of the rotating blade on the machine side, It is composed by.

According to the above construction, when the object to be cut is supplied from the supply port into the machine body, the end of the object to be cut rides on the cutting edge of the fixed blade, and in this state, the rotary blade rotates around the spindle. By doing so, the rotary blade is swung down, the end portion of the object to be cut is sandwiched between both the blade tips of the rotary blade and the fixed blade, and is cut by the rotational force as it is. The cut object is bounced from the discharge port and discharged to a predetermined position.

[0005]

Here, FIG. 6 (A),
(B) shows a rotary blade 100 used in a conventional general-purpose cutter. As shown in this figure, the conventional rotary blade 100 has an entire shape inclined in the longitudinal direction in consideration of cutting the object 102 well in relation to the fixed blade. Therefore, when an attempt is made to insert a hard work piece 102 such as a pruning twig between the blade edge of the rotary blade 100 and the blade edge of the fixed blade to cut, FIG.
As shown in (A), the cutting object 102 is the rotary blade 10.
There was a problem that the cutting efficiency was reduced in the direction of inclination of the blade edge of 0 (the direction of arrow P in FIG. 6A), and the cutting efficiency was lowered.

Further, when the above-mentioned conventional rotary blade 100 is used, as shown in FIG.
Is in a state of being sliced. That is, the cut object 102
When it was a pruned twig or the like, the cut object 104 could not be cut into smaller pieces than the sliced pieces. For this reason, there are drawbacks that the decomposition of the cut object 104 is difficult to proceed and it is difficult to compost. In particular, this point can be said to be an important issue to be solved early, considering the high interest and needs for producing compost in which organic matter is reduced by using pruned twigs and the like.

In view of the above facts, the present invention can provide a rotary blade for a cutter and a general-purpose cutter that can enhance the cutting efficiency of a material to be cut and can cut the material to be composted easily. Is the purpose.

[0008]

A cutter rotary blade according to the present invention as set forth in claim 1 is mounted on a rotary body which rotates about a spindle, and has its blade edge fixed at a predetermined position. A cutter rotary blade that is arranged in a state of being inclined at a predetermined angle with respect to the blade edge of the blade, and sandwiches the object to be cut between the blade edge of the blade itself and the blade edge of the fixed blade to cut the object with a rotational force. The blade of the rotary blade is provided with a plurality of grooves for preventing relative movement of the object to be cut in the inclination direction of the blade of the rotary blade.

A general-purpose cutter according to a second aspect of the present invention includes a fixed blade fixed to the main body of the apparatus, a rotatably supported blade on the main body of the apparatus, and a blade edge of itself fixed to a blade edge of the fixed blade. A general-purpose cutter that is arranged in an inclined state and that includes a rotary blade that sandwiches the object to be cut between the blade edge of the fixed blade and the blade edge of the fixed blade to cut the object with a rotational force. The blade of the rotary blade is provided with a plurality of grooves that prevent relative movement of the object to be cut in the inclination direction of the blade of the rotary blade.

According to the first aspect of the present invention, the object to be cut is provided between the blade edge of the rotary blade attached to the rotating body rotating about the support shaft and the blade edge of the fixed blade fixed at a predetermined position. The object is cut by the rotating force of the rotary blade. At this time, since the blade edge of the rotary blade of the present invention is arranged in a state of being inclined at a predetermined angle with respect to the blade edge of the fixed blade, the object to be cut will relatively move in the inclination direction of the blade edge of the rotary blade when being cut. And That is, at the time of cutting, the object to be cut tends to escape over the blade edge of the fixed blade in the inclination direction of the blade edge of the rotary blade.

Here, in the present invention, since a plurality of grooves are provided in the blade edge of the rotary blade, the object to be cut is relatively moved in the inclination direction of the blade edge of the rotary blade by catching the object to be cut in these grooves. Can be inhibited. That is, at the time of cutting, the object to be cut can be prevented from escaping in the inclination direction of the blade edge of the rotary blade. Therefore, the object to be cut can be surely cut.

Further, in the case of the present invention, the object to be cut is sheared in a state of being caught in a plurality of grooves provided in the blade tip of the rotary blade as described above. Therefore, the object to be cut is cut off so as to be scraped off from the blade tip side of the fixed blade. Therefore, the object to be cut can be finely crushed.

According to the second aspect of the present invention, the object to be cut is sandwiched between the blade edge of the rotary blade rotatably supported on the apparatus body side and the blade edge of the fixed blade fixed to the apparatus body side. The object to be cut is cut by the rotating force of the rotary blade. At this time, since the blade edge of the rotary blade of the present invention is arranged in a state of being inclined at a predetermined angle with respect to the blade edge of the fixed blade, the object to be cut will relatively move in the inclination direction of the blade edge of the rotary blade when being cut. And That is, at the time of cutting, the object to be cut tends to escape over the blade edge of the fixed blade in the inclination direction of the blade edge of the rotary blade.

Here, in the present invention, since the plurality of grooves are provided in the blade edge of the rotary blade, the object to be cut is relatively moved in the inclination direction of the blade edge of the rotary blade by catching the object to be cut in these grooves. Can be inhibited. That is, at the time of cutting, the object to be cut can be prevented from escaping in the inclination direction of the blade edge of the rotary blade. Therefore, the object to be cut can be surely cut.

Further, in the case of the present invention, the object to be cut is sheared in a state of being caught in a plurality of grooves provided at the blade edge of the rotary blade as described above. Therefore, the object to be cut is cut off so as to be scraped off from the blade tip side of the fixed blade. Therefore, the object to be cut can be finely crushed.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a general-purpose cutter according to the present invention will be described below with reference to FIGS.

FIG. 1 shows a general-purpose cutter 1 according to this embodiment.
A top view of 0 is shown. Further, FIG. 2 shows a vertical sectional view of the general-purpose cutter 10. As shown in these drawings, the general-purpose cutter 10 includes a body 12 that is hollow and formed into a substantially rectangular parallelepiped shape. A drive source such as a motor (not shown) is installed inside the machine body 12.

The general-purpose cutter 10 is mounted on the machine body 12 described above.
An apparatus main body 14 that constitutes a main part of is attached. Side covers 16 and 18 each having a relatively shallow depth are attached to both ends (both sides) of the apparatus body 14 in the width direction. Inside one of the side covers 16, a drive transmission unit (not shown) that is connected to a drive source such as a motor and transmits a drive force to a main shaft 54 described later is housed.

A duct-shaped supply gutter 22 for supplying the object 20 to be cut from a supply port 22A extends from one end (rear end) of the apparatus body 14 in the longitudinal direction. Also,
From the other end (front end) in the longitudinal direction of the device body 14, a duct-shaped discharge gutter 26 for discharging the cut object 24 formed by cutting the cut object 20 from the discharge port 26A is stretched. Has been issued. Both the supply gutter 22 and the discharge gutter 26 are attached to the apparatus body 14 so as to face obliquely upward. However, the supply gutter 22 is fixedly provided with respect to the apparatus main body 14, whereas the discharge gutter 26 is attached so as to be swingable around a hinge 28 provided at an upper end portion. Therefore, by adjusting the inclination angle of the discharge gutter 26 with respect to the apparatus body 14, the discharge distance of the cut object 24 can be arbitrarily changed.

An upper feed roll 30 and a lower feed roll 32 are vertically opposed to each other on the downstream side of the supply gutter 22 in the inclination direction. The upper feed roll 30 is fixed to an upper feed roll shaft 30A that is axially supported by a bearing plate 34. Similarly, the lower feed roll 32 is fixed to a lower feed roll shaft 32A that is axially supported by the bearing plate 34. In addition,
The bearing plate 34 is fixed to the upper end of the machine body 12 with bolts 36.

Further, the lower feed roll 32 has a guide member 38 having a vertical cross-sectional shape which is an inverted "up" and a reverse "L".
The fixed blade mounting base 40 is disposed so as to face the guide member 38 and has a substantially U-shaped vertical cross-section. The lower end of the bottom wall 22B of the supply gutter 22 is fixed to the outer upper end surface of the vertical wall 38A of the guide member 38. Upper end guide portion 38B of the guide member 38
In addition, the upper end guide portion 40B of the fixed blade mounting base 40 is arranged in an inclined state on the extension of the bottom wall 22B of the supply gutter 22, and is a guide for feeding the object 20 to be cut into the cutting processing chamber 42. Make up the surface. Further, the lower feed roll 32 is positioned so that the outer peripheral portion thereof faces the guide surface from a gap 44 formed between the upper end guide portions 38B and 40B.

Next, the cutting mechanism 46, which is a main part of the general-purpose cutter 10 according to this embodiment, will be described in detail.

The cutting mechanism 46 includes a fixed blade 48 and a rotary blade 50.
It has two types of blades. The fixed blade 48 is a long flat blade, and the vertical blade 4 of the fixed blade mounting base 40 described above is used.
It is fixed to the inner surface of 0A with bolts 51. When the fixed blade mounting base 40 is fixed to the upper end of the machine body 12 by the bolts 52, the fixed blade 48 is held perpendicular to the machine body 12. Therefore, the blade edge 48A of the fixed blade 48 is the body 1
It is directed upwards with respect to 2.

On the other hand, the cutting mechanism 46 has a main shaft 54 as a "support shaft" for driving the rotary blade 50.
The main shaft 54 is arranged with the width direction of the machine body 12 as the axial direction, and is rotatably supported by bearings 58 fixed by bolts 56 on both sides of the upper end portion of the machine body 12. It should be noted that one end of the main shaft 54 is connected to the above-mentioned drive transmission portion inside the side cover 16. Therefore, when a drive source such as a motor is driven, the main shaft 54 rotates around its axis at a predetermined rotation speed via the drive transmission unit.

In the vicinity of both axial ends of the main shaft 54 (inside the both side portions of the machine body 12), a pair of rotary blade mounting plates 60, which are disk-shaped "rotating bodies", are fixed. Therefore, when the main shaft 54 rotates, the pair of rotary blade mounting boards 60 also integrally rotate. Two rotary blades 50 each formed in a long shape are provided on the outer peripheral surface of the rotary blade mounting board 60.
Are attached with bolts 62. Two rotary blades 50
Are arranged at positions facing each other across the main shaft 54 (positions at intervals of 180 degrees). Further, the rotary blade 50 is not mounted parallel to the main shaft 54,
It is attached in an inclined state (obliquely).

FIG. 3 shows the detailed structure of the rotary blade 50 described above. 3A is a rear view of the rotary blade 50, and FIG. 3B is a left side view thereof (right side view when viewed from the front). As shown in this figure, the rotary blade 50 includes a pair of mounting portions 50A formed at both ends in the longitudinal direction, and an elongated main body portion 50B formed between the pair of mounting portions 50A. Mounting portion 50A and main body portion 50
It is constituted by a blade edge 50C extending from one end of B in a substantially V shape in a side view.

The mounting portion 50A is formed with a bolt insertion hole 64 into which a bolt 62 for mounting on the rotary blade mounting board 60 is inserted. Further, the main body portion 50B has a shape that is further raised than the mounting portion 50A. Furthermore, the cutting edge 50
C goes up one step from the attachment part 50A and the main body part 50B and then extends in a direction away from them.

As can be seen from FIGS. 3A and 3B, the rotary blade 50 has a shape slightly twisted in the longitudinal direction. That is, the rotary blade 50 is a twisting blade. The reason is as follows. Generally, the rotary blade 5 with respect to the main shaft 54 (which is also the direction of the cutting edge 48A of the fixed blade 48)
The object 20 to be cut is better cut when the direction of the blade edge 50C of 0 is inclined. Therefore, in the present embodiment, the rotary blade 50
The rotary blade 50 itself is inclined in the longitudinal direction, and the rotary blades 50 are attached to the outer peripheral surfaces of the pair of rotary blade mounting boards 60 so as to be slanted over them. However, with that alone, the blade edge 50C of the rotary blade 50 does not draw the same circular orbit (two-dot chain line Q in FIG. 2) over its entire length (effective cutting length) (compared to the both ends near the middle of the entire length). Since it becomes a slightly concave circular orbit), the shearing accuracy with the blade edge 48A of the fixed blade 48 decreases. In order to eliminate this point, in the present embodiment, the rotary blade 50 is slightly twisted in its longitudinal direction to improve shearing accuracy.

Further, the blade edge 50C of the rotary blade 50 described above
, A plurality of concave grooves 66 are formed in parallel at equal intervals. As shown in an enlarged manner in FIG. 4, each concave groove 66 has a semicircular cross section. In addition, in FIG.
In order to make 6 easy to understand, the twist of the rotary blade 50 is removed and its outer shape is simplified.

Next, the operation and effect of this embodiment will be described.

First, as shown in FIG. 2, a drive source such as a motor of the general-purpose cutter 10 is driven. As a result, the driving force of the driving source is transmitted to the upper feed roll 30,
It is transmitted to the lower feed roll 32 and the main shaft 54, and is rotated at a predetermined rotation speed in the directions of the arrows in FIG.

In this state, the cut object 20 such as a pruning twig is put in through the supply port 22A of the supply gutter 22. The thrown object 20 slides on the bottom wall 22B of the supply gutter 22 and is supplied between the upper feed roll 30 and the lower feed roll 32.
While the object 20 to be cut is nipped and conveyed between the upper feed roll 30 and the lower feed roll 32, it flows down on the guide surface composed of the guide member 38 and the fixed blade mounting base 40, and the end thereof is fixed blade 48. It is placed on the blade edge 48A of.

In this state, the rotary blade 50 rotates in the direction of the arrow in the figure, and the end of the object 20 is sandwiched between the blade edge 50C of the rotary blade 50 and the blade edge 48A of the fixed blade 48, and the rotary blade is rotated. The rotational force of 50 cuts the end of the object 20 to be cut.
At this time, since the blade edge 50C of the rotary blade 50 of the present embodiment is arranged in a state of being inclined at a predetermined angle with respect to the blade edge 48A of the fixed blade 48, the object 20 to be cut is the blade edge of the rotary blade 50 when being cut. Attempt to move relative to the inclination direction of 50C. That is, at the time of cutting, the object to be cut 20 tries to escape over the blade edge 48A of the fixed blade 48 in the inclination direction of the blade edge 50C of the rotary blade 50.

Here, in the present embodiment, since the plurality of concave grooves 66 are provided in the blade edge 50C of the rotary blade 50, the ends of the object 20 to be cut are caught in these grooves 66, so that the object 20 to be cut is cut. Can be prevented from moving relative to the inclination direction of the blade edge 50C of the rotary blade 50. That is, at the time of cutting, it is possible to prevent the object to be cut 20 from escaping in the inclination direction of the blade edge 50C of the rotary blade 50. Therefore, the to-be-cut object 20 can be reliably cut. As a result, according to the general-purpose cutter 10 according to the present embodiment, the cutting efficiency of the object 20 to be cut can be increased.

Further, in the case of the present embodiment, as described above, the object 20 to be cut is sheared while being caught in the plurality of concave grooves 66 provided in the blade edge 50C of the rotary blade 50. Therefore, the cut object 20 is, as shown in FIG.
The fixed blade 48 is cut off so as to be cut off from the blade edge 48A side, and becomes innumerable pieces 24. That is, the cut object 20 is finely crushed. As a result, according to the general-purpose cutter 10 according to the present embodiment, the object 20 to be cut can be cut into a state in which it is easy to compost.

Further, in the general-purpose cutter 10 according to this embodiment, the cutting object 20 is the cutting edge 50 of the rotary blade 50 as described above.
Since it is possible to prevent the workpiece 20 from escaping in the inclination direction of C and to reliably cut the object 20 at that position, the cutting objects 24 accumulate on the downstream side of the rotary blade 50 in the inclination direction, and the general-purpose cutter 10 itself is It is possible to avoid the situation of stopping.

Although the general-purpose cutter 10 according to the present embodiment described above is a stationary type, it may be a carrier type by attaching casters or wheels to the bottom surface of the machine body 12, or it may be self-propelled by mounting an engine. It may be a ceremony.

Further, in the general-purpose cutter 10 according to this embodiment described above, the object 20 to be cut is placed on the bottom wall 22B of the supply gutter 22.
However, it is also possible to adopt a configuration in which a belt conveyor is added to forcefully feed the object to be cut 20 into the cutting processing chamber 42.

Further, in the general-purpose cutter 10 according to the present embodiment described above, the rotary blade 50 is mounted on the outer peripheral surface of the pair of disk-shaped rotary blade mounting plates 60, but the present invention is not limited to this. Alternatively, the rotary blade 50 may be attached to the outer peripheral surface of the plate extending in the radial direction (the direction perpendicular to the axis).

Further, in the above-mentioned general-purpose cutter 10 according to the present embodiment, two rotary blades 50 are attached at an interval of 180 degrees, but one rotary blade 50 may be attached, or three or more rotary blades 50 may be attached.

[0041]

As described above, in the rotary blade for a cutter according to the present invention as defined in claim 1 and the general-purpose cutter according to the present invention as defined in claim 2, the object to be cut is a rotary blade at the cutting edge of the rotary blade. Since a plurality of grooves that prevent relative movement in the inclination direction of the blade edge of are provided, it is possible to prevent the work piece from escaping on the blade edge of the fixed blade in the inclination direction of the blade edge of the rotary blade during cutting, As a result, there is an excellent effect that the cutting efficiency of the object to be cut can be increased.

Further, in the rotary blade for a cutter according to the present invention as defined in claim 1 and the general-purpose cutter according to the present invention as defined in claim 2, the object to be cut is in the direction of inclination of the blade edge of the rotary blade. Since multiple grooves are provided to prevent relative movement, the object to be cut can be finely crushed, and as a result,
It has an excellent effect that the material to be cut can be cut into a state in which it can be easily composted.

[Brief description of drawings]

FIG. 1 is a plan view of a general-purpose cutter according to the present embodiment.

FIG. 2 is a vertical cross-sectional view of the general-purpose cutter shown in FIG.

FIG. 3A is a rear view of the cutter rotary blade according to the present embodiment, and FIG. 3B is a left side view of the cutter rotary blade.

FIG. 4 is a schematic rear view mainly showing a groove which is a main part of the rotary blade shown in FIG.

FIG. 5 is an explanatory diagram showing a situation of a cut object when a cut object (pruning twig) is cut using the general-purpose cutter according to the present embodiment.

FIG. 6A is a rear view of a rotary blade for a cutter according to a conventional example, and FIG. 6B is a left side view of the rotary blade for a cutter.

FIG. 7 is an explanatory diagram showing a state of a cut object when a cut object (pruning twig) is cut using a general-purpose cutter according to a conventional example.

[Explanation of symbols]

10 General purpose cutter 14 Device body 20 Objects to be cut 48 fixed blade 48A cutting edge 50 rotary blades 50C cutting edge 54 Spindle (Spindle) 60 rotary blade mounting board (rotating body) 66 groove

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 2B097 AA01 AA03 AA10 BA07 BC06                       BD01 BE02 CA01 DD12 FA33                       FA36 FA40 HA03 HC08

Claims (2)

[Claims] 1. A blade attached to a rotating body that rotates about a spindle and arranged such that its own cutting edge is inclined at a predetermined angle with respect to the cutting edge of a fixed blade fixed at a predetermined position. A rotary blade for a cutter that sandwiches the object to be cut between the blade edge of the fixed blade and the fixed blade, and cuts the object to be cut with a rotational force, wherein the blade edge of the rotary blade has the object to be cut. A rotary blade for a cutter, wherein a plurality of grooves are provided to prevent relative movement of the blade edge in the tilt direction. 2. A fixed blade fixed to the apparatus main body side, and a fixed blade rotatably supported by the apparatus main body side and having its own blade edge inclined with respect to the blade edge of the fixed blade by a predetermined angle. A general-purpose cutter configured to include a rotary blade that sandwiches an object to be cut between a blade edge and a blade edge of the fixed blade and cuts the object to be cut with a rotational force, wherein the blade edge of the rotary blade includes: A general-purpose cutter having a plurality of grooves for preventing relative movement of the object to be cut in the inclination direction of the blade edge of the rotary blade.