JP5385627B2 - Cutting device - Google Patents

Description

  The present invention relates to a cutting device that is mounted on an arm of an excavator excavator and performs a cutting operation of waste materials and the like.

  2. Description of the Related Art Conventionally, an attachment that is detachably attached to an arm tip of an excavator excavator, a moving blade frame having a pair of cutting blades on the left and right sides, and a fixed blade frame having a penetrating space and a pair of cutting blades on the left and right And a cutting apparatus that performs a cutting operation by swinging the moving blade frame so as to move forward and backward in the through space.

  In this cutting device, the right cutting blade is constituted by the right cutting blade of the moving blade frame and the right cutting blade of the fixed blade frame, and similarly, the left cutting is performed by the left cutting blade of the moving blade frame and the left cutting blade of the fixed blade frame. The left and right cutting parts simultaneously cut two objects to be cut by the swinging rotation of the moving blade frame.

  When cutting two cutting objects such as waste materials at the same time, the cutting edge of each cutting blade comes into contact with the cutting object at the same timing, and the pair of left and right cutting blades are simultaneously slid to perform cutting. The pressure applied by the hydraulic cylinder that swings the frame is distributed to the left and right cutting portions, which causes a problem of reducing cutting performance.

  In Patent Document 1, a plurality of cutting blades are arranged side by side on the first and second frames, and the cutting blades provided on the one side frame and the cutting blades provided on the other side frame are alternately staggered vertically. A cutting device has been proposed in which the cutting blades of at least one frame are asymmetrically shaped and slidably operated with a time difference from the cutting blades of the other frame. In Patent Document 1, since a time difference is provided in the cutting timing of the left and right cutting parts, dispersion of the applied pressure of the hydraulic cylinder can be prevented, and cutting performance can be improved.

Japanese Patent Laid-Open No. 2007-307646

By the way, waste materials include waste plastic, waste vinyl, waste wood, bamboo, industrial waste, and the like, and there are many long waste materials. In the conventional cutting apparatus, since the left and right portions are cut, the product is a single cut piece, and the cutting width is large, resulting in inconvenience in processing in the subsequent process. Although it is conceivable to perform the cutting process so as to subdivide again after cutting by the cutting device, it is disadvantageous in terms of work efficiency.

In addition, a member having rigidity such as waste wood or bamboo has a problem that when cutting, the breaking force of the waste material acts on the outside of the cutting blade, and the cut pieces are scattered around. In particular, the higher the cutting force by the cutting device, and the finer the cut pieces, the higher the tendency of the cut pieces to be scattered.

In addition, there are many flexible or elastic members such as waste plastic and waste vinyl in the waste material, but as in Patent Document 1, when a time difference is given to the cutting timing of the left and right cutting parts, At the time of cutting by one cutting part, it becomes a cantilever state by the other cutting part or a state without supporting force, so that the object to be cut cannot be firmly supported, and sufficient cutting performance cannot be secured.

An object of the present invention is to provide a cutting device that can achieve both cutting fragmentation and prevention of scattering during cutting while ensuring cutting performance.

A cutting device according to the present invention includes a first frame mounted on an arm of an excavator excavator, a plurality of first cutting blades provided in parallel with a length direction of the first frame, and the first frame. A second frame pivotably attached via a pivot shaft, a plurality of second cutting blades provided in parallel to the length direction of the second frame, and a swinging operation of the second frame A plurality of cutting portions capable of cutting the object to be cut by sliding the first cutting blade and the second cutting blade into contact with each other.

According to a first aspect of the present invention, the plurality of cutting portions include at least one of a first cutting portion on one end side, a second cutting portion on the other end side, and the first and second cutting portions. A third cutting unit, and when the cutting object is cut by swinging the second frame, the cutting timing of the cutting object by the first and second cutting units is the cutting object by the third cutting unit. It is set to be earlier than the cutting timing of the object.

In the first aspect of the present invention, the cutting portion includes at least one third cutting portion provided between the first cutting portion on one end side, the second cutting portion on the other end side, and the first and second cutting portions. Since it is comprised from a cutting part, at least 3 or more cutting objects can be shredded and it can be set as the fragmented cutting piece advantageous for a post process.

According to a second aspect of the present invention, in the first aspect of the present invention, a plane connecting the tip of the second cutting blade of the third cutting portion and the axis of the pivot shaft and the second cutting of the first and second cutting portions. A predetermined angle for generating a cutting timing difference is formed between a blade tip and a plane connecting the axis of the pivot shaft.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a first front end cutting blade provided at the front end of the first frame orthogonal to the length direction of the first frame, and a front end of the second frame And a second tip cutting blade provided perpendicular to the length direction of the second frame, and the first tip cutting blade and the second tip cutting blade are brought into sliding contact with each other by a swinging motion of the second frame. And a tip cutting part capable of cutting the cutting object, and when the cutting object is cut by swinging the second frame, the cutting timing of the cutting object by the tip cutting part is the first and first cutting timings. It is characterized by being set to be earlier than the cutting timing of the cutting object by the two cutting portions.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the first frame has a predetermined space inside and is configured to be capable of accommodating the second frame in the space. , characterized in that to swing the pivot axis direction by expansion and contraction of the hydraulic cylinder which is supported by the first frame.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the arm has a turning mechanism having a longitudinal direction as an axis at a tip thereof, and the first frame is fixed to the turning mechanism. It is characterized by being.

According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the second frame has a plurality of flat plate-like second frame members, and the second frame members are connected by a connecting member. Features.

The invention of claim 7 is the invention according to any one of claims 1 to 6, wherein the first frame is an intermediate portion parallel to the front end frame member, the one end side frame member, the other end side frame member, and the both side frame members. and a frame member, the intermediate frame member, characterized in that it is supported on said distal end frame member and the pivot axis.

According to the first aspect of the present invention, when the object to be cut is shredded in at least three places and the second frame swings, the cutting timing of the object to be cut by the first and second cutting portions is the third cutting. Since it is set so as to be earlier than the cutting timing of the object to be cut by the section, it is possible to achieve both the fragmentation of the cut piece and the prevention of scattering during cutting while ensuring the cutting performance.

That is, since the cutting timing of the object to be cut by the first and second cutting portions is early, wall portions by the first and second cutting portions are formed on both the left and right sides of the third cutting portion when the third cutting portion is cut. . By the wall part by this 1st, 2nd cutting part, scattering to the circumference | surroundings of the cutting piece subdivided by the 3rd cutting part is prevented. Moreover, since the cutting object is supported from the left and right sides by the first and second cutting parts at the time of cutting by the third cutting part, even if the cutting object has flexibility or elasticity, the third cutting is performed. The cutting performance of the part can be ensured.

  According to invention of Claim 2, the plane which connects the 2nd cutting blade front-end | tip of the said 3rd cutting part and the axial center of the said pivot shaft, the 2nd cutting-blade front end of the said 1st, 2nd cutting part, and the said pivot Since a predetermined angle for generating a cutting timing difference is formed between the plane connecting the axis of the support shafts, the cutting timing of each cutting portion can be set by the protruding amount of the cutting blade tip.

  According to the invention of claim 3, when the second frame swings, the cutting timing of the cutting object by the tip cutting portion is earlier than the cutting timing of the cutting object by the first and second cutting portions. Therefore, when the third cutting portion is cut, a wall formed by the first and second cutting portions is formed on the left and right sides of the third cutting portion, and a wall portion formed by the tip cutting portion is formed on the front side. By this wall part, scattering to the circumference | surroundings of the cutting piece subdivided by the 3rd cutting part can be prevented effectively.

According to the invention of claim 4, the second frame, in order to swing the pivot axis direction by expansion and contraction of the supported hydraulic cylinder to the first frame capable of accommodating the second frame, the second frame size The weight can be reduced and the hydraulic cylinder can be downsized.

According to the invention of claim 5, since the first frame is fixed to the turning mechanism, the object to be cut can be cut not only from one direction but also from the other direction, and further the shredding efficiency can be improved.

According to the sixth aspect of the present invention, the second frame has a plurality of flat plate-like second frame members, and the second frame members are connected by the connecting members. Even if an offset load is applied to the second frame member, the load can be distributed to the other second frame members.

According to the invention of claim 7, the intermediate frame member is supported on said distal end frame member and the pivot axis, while reducing the weight of the first frame, to form a third cutting unit with a simple structure .

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the hydraulic shovel which shows Example 1 of this invention. It is a side view of the cutting device concerning Example 1. 1 is a front sectional view of a cutting device according to Embodiment 1. FIG. It is operation | movement explanatory drawing of the cutting device which concerns on Example 1, (A) is a cross section of a front-end | tip cutting part, (B) is before cutting operation of the 1st, 2nd cutting part, (C) is the 1st, 2nd cutting. It is a figure which shows after the cutting operation of a part. 3 is a time chart of the cutting apparatus according to the first embodiment. FIG. 3 is a diagram corresponding to FIG. 3 according to the second embodiment. 6 is a time chart of the cutting apparatus according to the second embodiment. It is a perspective view of the cutting device concerning Example 3. FIG. It is a side view of the cutting device concerning Example 3. 6 is a plan sectional view of a cutting device according to Embodiment 3. FIG. 6 is a perspective view of a fixed blade frame according to Embodiment 3. FIG. 6 is a side view of a fixed blade frame according to Embodiment 3. FIG. 6 is a plan view of a fixed blade frame according to Embodiment 4. FIG. 6 is a side view of an intermediate frame according to Embodiment 4. FIG. 10 is a plan view of a fixed blade frame according to Embodiment 5. FIG. FIG. 10 is a side view of an intermediate frame according to a fifth embodiment. FIG. 9 is a diagram corresponding to FIG. 3 according to a sixth embodiment. 10 is a cross-sectional view of a cutting blade according to Example 6. FIG. FIG. 9 is a diagram corresponding to FIG. It is sectional drawing which concerns on the modification of a cutting blade.

  Hereinafter, the best mode for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, a hydraulic excavator 1 as an excavator excavator is fixed to an excavator body 2 on which an operator can ride, a boom that is swingably fixed to the excavator body 2, and is swinged by a boom cylinder (not shown). 3, an arm 4 pivotally supported at the tip of the boom 3, a turning device 5 installed at the tip of the arm 4, and a cutting device 6 detachably attached to the turning device 5.

  The arm 4 is pivotally supported at the tip of the boom 3 so as to be swingable about the arm swing shaft 7 as an axis. When a hydraulic boom cylinder 8 having one end fixed to the boom 3 and the other end fixed to the rear end of the arm 4 extends, the arm 4 swings counterclockwise about the arm swing shaft 7 as an axis. It is configured to rotate.

The swivel device 5 is pivotally supported by the swivel device swing shaft 9 as an axis center at the rear end one side portion at the tip of the arm 4. The other end of the bucket cylinder 10 whose one end is fixed to the arm 4 swings one end in the vicinity of the tip of the arm 4 and the H link 11 that is pivotally supported on the other side portion of the rear end of the swing device 5. It is connected to the other end of each side link 12 that is pivotally supported. When the bucket cylinder 10 is extended, the swing device 5 is configured to swing counterclockwise about the swing device swing shaft 9 as an axis.

As shown in FIG. 2, the turning device 5 extends from the turning body 13, the turning bearing 14, a rotating means 15 such as a motor fixed to the turning body 13, and the hydraulic piping 16 (see FIG. 1) of the arm 4. And a rubber hydraulic pipe 17 to be made. The slewing bearing 14 is configured to be capable of 360 ° slewing in the left-right direction around the center of the slewing main body 13 by the rotation of the rotating means 15.

  The cutting device 6 includes a fixed blade frame 18 (first frame), a moving blade frame 19 (second frame), a hydraulic cylinder 20 capable of swinging and driving the moving blade frame 19, and an attaching / detaching portion 21. The attaching / detaching portion 21 is attached to the turning bearing 14 by the attaching / detaching mechanism (not shown) of the cutting device 6. The hydraulic cylinder 20 is supplied with hydraulic pressure by a hydraulic pipe 23 from a rotary joint 22 such as a rotary joint installed on the slewing bearing 14.

As shown in FIGS. 2 and 3, the fixed blade frame 18 includes a fixed blade tip frame member 24, a flat plate-shaped first fixed frame member 25 extending in the length direction of the arm 4, and the arm 4. The second fixed frame member 25 on the other side of the flat plate extending in the length direction, and the third fixed frame having a substantially U-shaped cross section interposed between the first fixed frame member 25 and the second fixed frame member 26 The member 27, the first support portion 28, and the second support portion 29 are configured. The first fixed frame member 25, the second fixed frame member 26, and the third fixed frame member 27 are integrally configured, and between the first fixed frame member 25 and the third fixed frame member 27, and The through spaces S1 and S2 are formed between the second fixed frame member 26 and the third fixed frame member 27, respectively.

The first fixed cutting member 30 has a substantially U-shaped first fixed cutting blade 30 at the inner upper end region of the first fixed frame member 25, and the second fixed cutting member 31 has a substantially H-shaped second upper fixing region at the inner upper end region of the second fixed frame member 26. A substantially fixed letter-shaped third fixed cutting blade 32 is formed in the upper end region of the fixed frame member 27 on the first fixed cutting blade 30 side, and a substantially letter-shaped shape is formed on the upper fixed region of the third fixed frame member 27 on the second fixed cutting blade 31 side. The fourth fixed cutting blades 33 are fixed to the fixed frame members 25 to 27 by bolts. A fixed tip cutting blade 34 is fixed inside the fixed blade tip frame member 24. The fixed cutting blades 30 to 34 have the same cutting edge surface.

As shown in FIG. 3, the moving blade frame 19 includes a first moving frame member 35 having a substantially U-shaped cross section, a second moving frame member 36 having a substantially U-shaped cross section, and a third support portion 50 (see FIG. 2). ) And a fourth support portion 37 (see FIG. 2). As for the lower end surface 35a of the 1st moving frame member 35, the outer side part protrudes below predetermined distance (alpha) 1 with respect to the inner side part. Similarly, the lower end surface 36a of the second moving frame member 36 has an outer portion protruding downward by a predetermined distance α1 with respect to the inner portion.

  The first moving frame member 35 has an outer lower end region having a substantially U-shaped first dynamic cutting blade 38, and the second moving frame member 36 has an outer lower end region having a substantially U-shaped second dynamic cutting blade 39, The substantially frame-shaped third moving cutting blade 40 is moved to the inner lower end region of the moving frame member 35, and the substantially moveable fourth moving cutting blade 41 is moved to the inner lower end region of the second moving frame member 36 by a bolt. The frame members 35 and 36 are fixed respectively. Moreover, the 1st, 2nd front end dynamic cutting blades 42 and 43 are being fixed to the front front-end | tip part of both the moving frame members 35 and 36, respectively.

  The relationship between the cutting edge surfaces of the respective dynamic cutting blades 38 to 43 is such that the cutting edge surfaces of the third and fourth dynamic cutting blades 40 and 41 have the same height, and the cutting edge surfaces of the first and second dynamic cutting blades 38 and 39 are the same. The cutting edge surfaces of the first and second tip moving cutting blades 42 and 43 are configured to have the same height. In addition, the cutting edge surface of the first tip cutting blade 42 protrudes a predetermined distance α2 below the cutting edge surface of the first cutting blade 38, and the cutting edge surface of the first cutting blade 38 is the same as that of the third cutting blade 40. It protrudes below the blade edge surface by a predetermined distance α1 (see FIG. 2).

The first cutting blade 38 and the first fixed cutting blade 30 are scissor-compressible first cutting portion 44, and the second dynamic cutting blade 39 and the second fixed cutting blade 31 are scissor-compressible second cutting portion 45. The third cutting section 46, in which the third dynamic cutting blade 40 and the third fixed cutting blade 32 can compress the scissors, and the fourth cutting, in which the fourth dynamic cutting blade 41 and the fourth fixed cutting blade 33 can compress the scissors. As for the part 47, the 1st, 2nd front end dynamic cutting blades 42 and 43 and the front end fixed cutting blade 34 constitute a front end cutting portion 48 capable of scissor compression.

As the moving blade frame 19 swings, the first moving frame member 35 can be accommodated in the through space S1, and the second moving frame member 36 can be accommodated in the through space S2. The moving blade frame 19 is configured to be narrower than the fixed blade frame 18. The moving blade frame 19 is swingably supported by a pin portion 49 that passes through the first and fourth support portions 28 and 37 with respect to the fixed blade frame 18, and the moving blade frame 19 is rotated clockwise by the extension operation of the hydraulic cylinder 20. It is configured to rotate.

Further, one end portion of the hydraulic cylinder 20 is rotatably supported by the second support portion 29, and the other end portion is rotatably supported by the third support portion 50. That is, as shown in FIG. 2, at the time of cutting, the tips of the third and fourth dynamic cutting blades 40 and 41 of the third and fourth cutting portions 46 and 47 and the pin portion 49 serving as the axis of the pivot shaft are provided. The connecting plane and the plane connecting the tips of the first and second dynamic cutting blades 38 and 39 of the first and second cutting portions 44 and 45 and the pin portion 49 have a cutting difference of a predetermined angle β based on the predetermined distance α1. In other words, it has a so-called cutting timing difference.

Next, based on FIG.4 and FIG.5, the action | operation of the cutting device 6 which concerns on Example 1 is demonstrated.
When the hydraulic cylinder 20 is extended, the moving blade frame 19 starts swinging around the pin portion 49, and the fixed blade frame 18 and the moving blade frame 19 are moved as shown in FIGS. 4 (a) and 4 (b). The object to be cut O is gripped. After gripping the object to be cut O, the cutting edge surfaces of the first and second leading edge moving cutting blades 42 and 43 come into contact with the cutting edge surface of the fixed tip cutting blade 34 to perform a first sliding contact operation.

As shown in FIG. 4 (c), after the first sliding contact operation, when the extension of the hydraulic cylinder 20 proceeds, the cutting edge surfaces of the first and second dynamic cutting blades 38 and 39 become the first and second fixed cutting blades 30. , 31 and the second slidable contact operation is started. When the extension of the hydraulic cylinder 20 further proceeds after the second sliding contact operation, the cutting edge surfaces of the third and fourth dynamic cutting blades 40 and 41 come into contact with the cutting edge surfaces of the third and fourth fixed cutting blades 32 and 33, A third sliding contact operation is performed. In addition, simultaneously with the start of the second sliding contact operation, the first and second moving frame members 35 and 36 start to enter the through spaces S1 and S2.

As shown in the time chart of FIG. 5, first, the tip cutting unit 48 performs the cutting operation alone, so that the applied pressure of the hydraulic cylinder 20 is not distributed to other cutting units, and all of the tip cutting unit 48 Can be used for cutting force. Next, since the 1st cutting part 44 and the 2nd cutting part 45 perform cutting operation simultaneously, when one cutting part cuts, the other cutting part can support cutting object O, and cutting performance is improved. It can be secured.

Next, since the 3rd cutting part 46 and the 4th cutting part 47 perform cutting operation simultaneously, when one cutting part cuts, the other cutting part can support cutting object O. Moreover, the 1st cutting part 44 and the 2nd cutting part 45 can be made into the state which supports the cutting target O from both sides, and even if it is the cutting target O which has flexibility and elasticity, it can cut reliably. Moreover, even if the fragmented cut pieces are scattered, the third cutting portion 46 and the fourth cutting portion 47 are the first and second fixed frame members 25 and 26 and the first and second moving frame members 35. , 36 are enclosed on the left and right sides, and scattering to the periphery of the cut piece can be prevented.

Next, Example 2 will be described based on the time charts of FIGS. 6 and 7. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG. The difference from the first embodiment is that in the first embodiment, the first cutting section 44 and the second cutting section 45 have the same cutting timing, and the third cutting section 46 and the fourth cutting section 47 have the same cutting timing. In contrast, the second embodiment is different in the cutting timing of each cutting portion.

Similarly to the first embodiment, the cutting device 6 includes a fixed blade frame 18, a moving blade frame 19, a hydraulic cylinder 20 that can be driven to swing the moving blade frame 19, and an attachment / detachment portion 21.

The first fixed cutting member 30 has a substantially U-shaped first fixed cutting blade 30 at the inner upper end region of the first fixed frame member 25, and the second fixed cutting member 31 has a substantially H-shaped second upper fixing region at the inner upper end region of the second fixed frame member 26. A substantially fixed letter-shaped third fixed cutting blade 32 is formed in the upper end region of the fixed frame member 27 on the first fixed cutting blade 30 side, and a substantially letter-shaped shape is formed on the upper fixed region of the third fixed frame member 27 on the second fixed cutting blade 31 side. The fourth fixed cutting blade 33 is fixed to the fixed frame members 25 to 27 by bolts. A fixed tip cutting blade 34 is fixed inside the fixed blade tip frame member 24. The fixed cutting blades 30 to 34 have the same cutting edge surface.

The lower end surface 35a of the first moving frame member 35 has an outer portion protruding downward by a predetermined distance 2 × α1 with respect to the inner portion. Similarly, the lower end surface 36a of the second moving frame member 36 has an outer portion protruding downward by a predetermined distance 2 × α1 with respect to the inner portion. Further, the inner portion of the lower end surface 35a of the first moving frame member 35 is configured to protrude downward by a predetermined distance α1 with respect to the inner portion of the lower end surface 36a of the second moving frame member 36.

  The first moving frame member 35 has an outer lower end region having a substantially U-shaped first dynamic cutting blade 38, and the second moving frame member 36 has an outer lower end region having a substantially U-shaped second dynamic cutting blade 39, The substantially frame-shaped third moving cutting blade 40 is moved to the inner lower end region of the moving frame member 35, and the substantially moveable fourth moving cutting blade 41 is moved to the inner lower end region of the second moving frame member 36 by a bolt. The frame members 35 and 36 are fixed. Moreover, the 1st, 2nd front end dynamic cutting blades 42 and 43 are being fixed to the front front-end | tip part of both the moving frame members 35 and 36, respectively. In addition, the 1st, 2nd front end dynamic cutting blades 42 and 43 are comprised by the same height.

  The relationship between the cutting edge surfaces of the respective dynamic cutting blades 38 to 43 is that the cutting edge surface of the third dynamic cutting blade 40 protrudes below the fourth dynamic cutting blade 41 by a predetermined distance α1 and the cutting edge surface of the second dynamic cutting blade 39. Is protruded below a predetermined distance α1 from the cutting edge surface of the third dynamic cutting blade 40, and the cutting edge surface of the first dynamic cutting blade 38 protrudes below the cutting edge surface of the second dynamic cutting blade 39 by a predetermined distance α1. Is done. Further, the cutting edge surface of the first tip moving cutting blade 42 protrudes below the cutting edge surface of the first moving cutting blade 38 by a predetermined distance α2.

The first cutting blade 38 and the first fixed cutting blade 30 are scissor-compressible first cutting portion 44, and the second dynamic cutting blade 39 and the second fixed cutting blade 31 are scissor-compressible second cutting portion 45. The third cutting section 46, in which the third dynamic cutting blade 40 and the third fixed cutting blade 32 can compress the scissors, and the fourth cutting, in which the fourth dynamic cutting blade 41 and the fourth fixed cutting blade 33 can compress the scissors. As for the part 47, the 1st, 2nd front end dynamic cutting blades 42 and 43 and the front end fixed cutting blade 34 constitute a front end cutting portion 48 capable of scissor compression.

As shown in the time chart of FIG. 7, first, the tip cutting unit 48 performs the cutting operation alone, so that the applied pressure of the hydraulic cylinder 20 is not distributed to the other cutting units, and all of the tip cutting unit 48 Can be used for cutting force. Next, since the first cutting unit 44 and the second cutting unit 45 perform the cutting operation independently, the applied pressure of the hydraulic cylinder 20 is not distributed to the other cutting units, and all the first cutting unit 44 and It can be used for each cutting force with the second cutting part 45.

Next, since the third cutting unit 46 performs a cutting operation alone, the pressure applied to the hydraulic cylinder 20 is not distributed to other cutting units. Moreover, even if the fragmented pieces are scattered, the third cutting portion 46 is surrounded by the first and second fixed frame members 25 and 26 and the first and second moving frame members 35 and 36. Therefore, scattering around the cut piece can be prevented.

After the cutting operation of the third cutting portion 46, the fourth cutting portion 47 performs the cutting operation alone, so that the applied pressure of the hydraulic cylinder 20 is not distributed to other cutting portions. Moreover, even if the fragmented pieces are scattered, the fourth cutting portion 47 is surrounded by the first and second fixed frame members 25 and 26 and the first and second moving frame members 35 and 36. Therefore, scattering around the cut piece can be prevented.

Next, Example 3 will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG. The difference from the first embodiment is that, in the first embodiment, the first fixed frame member 25, the second fixed frame member 26, and the third fixed frame member 27 are integrally configured. The third fixed frame member 27 is configured by a separate member from the first and second fixed frame members 25 and 26.

The cutting device 6 includes a fixed blade frame 18, a moving blade frame 19, and a hydraulic cylinder 20 capable of swinging and driving the moving blade frame 19. The cutting device 6 is configured to be directly attached to the tip of the arm 4, but can also be attached via the turning device 5.

The fixed blade frame 18 includes a fixed blade tip frame member 24, a flat plate-like first fixed frame member 25, a second fixed frame member 26, and between the first fixed frame member 25 and the second fixed frame member 26. A rectangular parallelepiped intermediate frame member 51 that is interposed and parallel to the fixed frame members 25 and 26, the first support portion 28, the second support portion 29, the first opening 52 that is pivotally supported by the arm 4, and the H link 11 The second opening 53 is connected to the second opening 53. Note that through spaces S1 and S2 are formed between the first fixed frame member 25 and the intermediate frame member 51 and between the second fixed frame member 26 and the intermediate frame member 51, respectively.

The first fixed frame member 25 has an inner upper end region substantially in a letter-shaped first fixed cutting blade 30, and the second fixed frame member 26 has an inner upper end region in a substantially square-shaped second fixed cutting blade 31, an intermediate frame. A substantially fixed U-shaped third fixed cutting blade 32 is provided on the upper end region of the member 51 on the first fixed cutting blade 30 side, and a substantially fixed U-shaped fourth fixed position is provided on the upper end region of the intermediate frame member 51 on the second fixed cutting blade 31 side. The cutting blade 33 is being fixed to each frame member 25, 26, 51 by the volt | bolt, respectively. Also, first and second tip fixed cutting blades 34a and 34b are fixed inside the fixed blade tip frame member 24, respectively. Each of the fixed cutting blades 30 to 34a and 34b has the same blade edge surface.

As shown in FIG. 8, the moving blade frame 19 includes a first moving frame member 35 having a substantially U-shaped cross section, a second moving frame member 36 having a substantially U-shaped cross section, a first moving frame member 35, and a second moving frame member 35. The connecting member 54 is connected to the moving frame member 36, and the boss portion 55 is connected to the first moving frame member 35 and the second moving frame member 36 and is rotatable around the pin portion 49. .

  The first moving frame member 35 has a first tip moving cutting blade 42 attached to the front tip portion. In addition, the first moving frame member 35 has a first generally-shaped first moving cutting blade 38 in the outer lower end region, and a third generally-shaped third moving cutting blade 40 in the inner lower end region. The second moving frame member 36 has a second tip moving cutting blade 43 attached to the front tip portion. In addition, the second moving frame member 36 has a substantially heel-shaped second moving cutting blade 39 in the outer lower end region, and a substantially heel-shaped fourth moving cutting blade 41 in the inner lower end region.

As in the first embodiment, the first dynamic cutting blade 38 and the first fixed cutting blade 30 are the first cutting portion 44, and the second dynamic cutting blade 39 and the second fixed cutting blade 31 are the second cutting portion 45. The third dynamic cutting blade 40 and the third fixed cutting blade 32 are the third cutting portion 46, the fourth dynamic cutting blade 41 and the fourth fixed cutting blade 33 are the fourth cutting portion 47, the first and first The two tip moving cutting blades 42 and 43 and the first and second tip fixed cutting blades 34a and 34b constitute the tip cutting portion 48, respectively.

As shown in FIG. 11, the boss portion 55 is continuously formed through a cylindrical boss main body portion 55a that can slide and rotate around the pin portion 49, the first moving frame member 35, and the boss main body portion 55a. The first connecting portion 55b has a first connecting portion 55c that is provided on the first connecting portion 55b and connected to the hydraulic cylinder 20. The boss portion 55 is provided in the second connecting portion 55d and the first connecting portion 55d that are continuously formed via the second moving frame member 36 and the boss main body portion 55a, and is connected to the hydraulic cylinder 20. Two connection portions 55e are provided.

As shown in FIG. 12, the intermediate frame member 51 includes an arc portion 56 formed in the rear end portion of the intermediate frame member 51 in a substantially arc shape when viewed from the side, and a flat plate-like fixing portion 57. The arc portion 56 is set to have the same center as that of the pin portion 49 in a state where the intermediate frame member 51 is fixed to the fixed blade frame 18 and to be separated from the boss main body portion 55a by a predetermined interval γ.

A front end portion of the intermediate frame member 51 is fixed to the fixed blade front end wall portion 24, and a rear end portion of the intermediate frame member 51 is fixed to the fixed blade frame 18 by a fixing portion 57 that contacts the lower end surface of the arc portion 56. . The left and right side surfaces of the fixing portion 57 are fixed to the first frame member 35 and the second frame member 36 by fastening means (not shown).

  The relationship between the cutting edge surfaces of the respective dynamic cutting blades 38 to 43 is the same as in the first embodiment, in which the cutting edge surfaces of the third and fourth dynamic cutting blades 40 and 41 have the same height, and the first and second dynamic cutting blades 38. , 39 have the same height, and the first and second distal end cutting blades 42, 43 have the same height. In addition, the cutting edge surface of the first tip cutting blade 42 protrudes a predetermined distance α2 below the cutting edge surface of the first cutting blade 38, and the cutting edge surface of the first cutting blade 38 is the same as that of the third cutting blade 40. It protrudes below the blade edge surface by a predetermined distance α1.

Next, operations and effects of the cutting device 6 according to the third embodiment will be described.
Similarly to the first embodiment, when the third cutting portion 46 and the fourth cutting portion 47 perform the cutting operation, the first cutting portion 44 and the second cutting portion 45 support the cutting object O from both sides. Even if it is the cutting object O which has flexibility and elasticity, it can cut reliably. Further, the third cutting portion 46 and the fourth cutting portion 47 are surrounded by the first and second fixed frame members 25 and 26 and the first and second moving frame members 35 and 36, and to the periphery of the cut piece. Can be prevented.

Since the first moving frame member 35 and the second moving frame member 36 can be divided and formed by a plate material and are connected by the connecting member 54, the moving blade frame 19 can be reduced in weight and an unbalanced load is applied to one of the moving frame members. The load can be distributed to the other moving frame member. The connecting member 54 can be omitted when the strength of the cutting object O is small or when the moving blade frame 19 has high rigidity.

The intermediate frame member 51 is a separate member from the fixed blade frame 18, and is independent from the boss main body portion 55 a, one end is fixed to the fixed blade frame 18 by the fixing portion 57 via the arc portion 56, and the other end is the tip. It is fixed to the fixed frame member 24. In this case, since the boss main body portion 55a and the circular arc portion 56 are separated by a predetermined interval γ by the fixing portion 57, the sliding resistance caused by the swinging motion of the moving blade frame 19 can be reduced.

Next, based on FIG.13 and FIG.14, Example 4 which changed Example 3 is demonstrated. In addition, the same code | symbol is attached | subjected to the structure similar to Example 3. FIG. The difference from the third embodiment is that the rear end portion of the intermediate frame member 51 is supported by the first and second fixed frame members 25 and 26 in the third embodiment, whereas the intermediate frame member 51 in the fourth embodiment. The rear end portion is supported by the pin portion 49.

The fixed blade frame 18 includes a fixed blade tip wall portion 24, a flat plate-like first fixed frame member 25, a second fixed frame member 26, and between the first fixed frame member 25 and the second fixed frame member 26. An intermediate frame member 51 that is interposed and parallel to the fixed frame members 25 and 26 and a first support portion 28 are provided.

As shown in FIG. 13, the moving blade frame 19 includes a first moving frame boss formed on the first moving frame member 35, the second moving frame member 36, and the first moving frame member 35 and capable of rotating around the pin portion 49. 35 b, a first moving frame connecting portion 35 c connected to the hydraulic cylinder 20, a second moving frame boss portion 36 b formed on the second moving frame member 36 and rotatable around the pin portion 49, and the hydraulic cylinder 20. And a second moving frame connecting portion 36c. Between the first moving frame connecting portion 35c and the second moving frame connecting portion 36c, a connecting portion 54a that synchronizes both and increases rigidity is installed. A bearing 58 such as a rotary bearing is disposed between the boss portions 35 b and 36 b and the pin portion 49.

As shown in FIG. 14, the intermediate frame member 51 includes an intermediate frame member main body 51a to which the third and fourth fixed cutting blades 32 and 33 are attached, and a semicircular shape formed at the rear end portion of the intermediate frame member main body 51a. The first cap portion 51b and the semi-circular second cap portion 51c that sandwiches the pin portion 49 in cooperation with the first cap portion 51b.

The front end portion of the intermediate frame member main body 51a is connected to a pair of brackets 24a, 24a projecting inward from the central region of the fixed blade front end frame member 24 by a pin member or the like, and the rear end portion is connected to the first cap portion 51b. The second cap portion 51c is fastened and fixed with a bolt or the like with the pin portion 49 interposed therebetween.

With the above configuration, the first moving frame member 35 and the second moving frame member 36 can be formed separately, and the moldability of the moving blade frame 19 and the material yield can be improved. Further, the intermediate frame member 51 is supported by the intermediate frame member 51 and the pin member of the bracket 24a so that the intermediate frame member 51 is not deformed excessively even if the pin portion 49 is elastically deformed. The two cap portions 51b and 51c are rotatably supported. In addition, the support of the intermediate frame member 51 according to the present invention includes the support capable of rotating and sliding as described above and the fixing support by the fastening means or the like, and can be selectively used according to the purpose and application. It is.

Next, a fifth embodiment obtained by modifying the third embodiment will be described with reference to FIGS. 15 and 16. In addition, the same code | symbol is attached | subjected to the structure similar to Example 3. FIG. The difference from the third embodiment is that the rear end portion of the intermediate frame member 51 is supported by the first and second fixed frame members 25 and 26 in the third embodiment, whereas the intermediate frame member 51 in the fourth embodiment. The rear end portion is supported by the boss body 55a.

The fixed blade frame 18 includes a fixed blade tip frame member 24, a flat plate-like first fixed frame member 25, a second fixed frame member 26, and between the first fixed frame member 25 and the second fixed frame member 26. An intermediate frame member 51 and a first support portion 28 that are interposed and parallel to the fixed frame members 25 and 26 are provided.

The moving blade frame 19 is connected to the first moving frame member 35, the second moving frame member 36, the first moving frame member 35 and the second moving frame member 36, and is rotatable around the pin portion 49. The boss portion 55 is supported.

  As shown in FIG. 15, the boss portion 55 is continuously formed through a cylindrical boss main body portion 55a that can slide and rotate around the pin portion 49, the first moving frame member 35, and the boss main body portion 55a. The first connecting portion 55b has a first connecting portion 55c that is provided on the first connecting portion 55b and connected to the hydraulic cylinder 20. The boss portion 55 is provided in the second connecting portion 55d and the first connecting portion 55d that are continuously formed via the second moving frame member 36 and the boss main body portion 55a, and is connected to the hydraulic cylinder 20. Two connection portions 55e are provided.

As shown in FIG. 16, the intermediate frame member 51 includes an intermediate frame member main body 51a to which the third and fourth fixed cutting blades 32 and 33 are attached, and a semicircular shape formed at the rear end portion of the intermediate frame member main body 51a. The first cap portion 51b and the semi-circular second cap portion 51c that sandwiches the pin portion 49 in cooperation with the first cap portion 51b.

The front end portion of the intermediate frame member main body 51a is connected to a pair of brackets 24a and 24a projecting inward from the central region of the fixed blade front end frame member 24 by a pin member and the rear end portion is bossed to the first cap portion 51b. The second cap portion 51c is fastened and fixed with a bolt or the like with the central region of the main body portion 55a being sandwiched.

  In order to reduce the sliding resistance of the moving blade frame 19, the thrust collar 59a, the second fixed frame member 26, and one of the boss main body portions 55a are provided between the first fixed frame member 25 and one end portion of the boss main body portion 55a. A thrust collar 59b is disposed between the side ends. A bearing 60 such as a rotary bearing is disposed between the boss main body portion 55a and the first and second cap portions 51b and 51c.

With the above configuration, since the intermediate frame member 51 of the fixed blade frame 18 is a separate member, abnormal stress is generated due to the deformation of the intermediate frame member 51 with respect to the rotation gap of the boss main body 55a and the bending of the pin member 49. And the moldability of the fixed blade frame 18 can be improved. In addition, the intermediate frame member 51 can be easily attached and detached, and maintenance is advantageous.

Next, Example 6 will be described based on FIGS. 17 and 18. In addition, the same code | symbol is attached | subjected to the structure similar to Example 1. FIG. The difference from the first embodiment is that in the first embodiment, the third fixed frame member 27 and the first and second moving frame members 35 and 36 are U-shaped members in cross section, whereas in the sixth embodiment, the third fixed frame member 27 and the first and second moving frame members 35 and 36 are third fixed. Similar to the first and second fixed frame members 25 and 26, the frame member and the first and second moving frame members are flat plate members.

As shown in FIG. 17, the fixed blade frame 18 includes a fixed blade tip frame member 24 (see FIG. 2), a flat plate-like first fixed frame member 25 extending in the length direction of the arm 4, and an arm. 4, the second fixed frame member 26 on the other side of the flat plate extending in the length direction, and the flat third fixed frame member interposed between the first fixed frame member 25 and the second fixed frame member 26. 61. Note that through spaces S1 and S2 are formed between the first fixed frame member 25 and the third fixed frame member 61 and between the second fixed frame member 26 and the third fixed frame member 61, respectively.

The first fixed cutting blade 62 is provided in the inner upper end region of the first fixed frame member 25, the second fixed cutting blade 63 is provided in the inner upper end region of the second fixed frame member 26, and the first fixed cutting blade of the third fixed frame member 61. A third fixed cutting blade 64 is provided on the upper end region on the 62 side, and a fourth fixed cutting blade 65 is provided on the upper end region on the second fixed cutting blade 63 side of the third fixed frame member 61 on the respective wall portions by countersunk bolts 66, 66. It is fixed. The fixed cutting blades 62 to 65 are provided with a pair of cutting blades 67 having substantially the same shape, and the tip fixed cutting blade 34 and each of the fixed cutting blades 62 to 65 are both cutting edge surfaces. Are the same height.

As shown in FIG. 18, the cutting blade 67 has a rectangular parallelepiped shape, and is formed with an upper end surface 67 a having a blade part at both ends, a lower end surface 67 b having a blade part at both ends, and a front and back both surfaces at the center in the vertical direction. Conical recesses 67c and 67c and a cylindrical portion 67d for connecting the recesses 67c and 67c are formed. With this configuration, the countersunk bolt 66 can fasten the cutting blade 67 from the through spaces S1 and S2, so that the countersunk portion of the countersunk bolt 66 can be accommodated in the recess 67c, and the fixed blade frame 18 can be downsized. And since a blade part is formed in four corners, the same cutting blade 67 can be used 4 times by changing a blade part.

As shown in FIG. 17, the moving blade frame 19 includes a flat plate-like first moving frame member 68, a flat plate-like second moving frame member 69, a third support portion 50 (see FIG. 2), and a fourth support. It consists of the part 37 (refer FIG. 2). The lower end surface 68a of the first moving frame member 68 has an outer portion protruding downward by a predetermined distance α1 with respect to the inner portion. Similarly, the lower end surface 69a of the second moving frame member 69 has an outer portion protruding downward from the inner portion by a predetermined distance α1.

  The first moving cutting blade 70 is disposed in the outer lower end region of the first moving frame member 68, the second moving cutting blade 71 is disposed in the outer lower end region of the second frame member 69, and the inner lower end region of the first moving frame member 68 is disposed in the first lower end region. A fourth moving cutting blade 73 is fixed to the two moving frame members 68 and 69 by bolts 66, 66... At the inner lower end regions of the third moving cutting blade 72 and the second moving frame member 69. In addition, the dynamic cutting blades 70 to 73 have a pair of cutting blades 67 having the same shape as the fixed cutting blades 62 to 65, and are mounted in a substantially square shape.

  The relationship between the cutting edge surfaces of the respective dynamic cutting blades 70 to 73 is the same as that of the first embodiment, in which the cutting edge surfaces of the third and fourth dynamic cutting blades 72 and 73 have the same height, and the first and second dynamic cutting blades 70. , 71 have the same height, and the first and second distal end cutting blades 42, 43 have the same height. Further, the cutting edge surface of the first tip cutting blade 42 protrudes a predetermined distance α2 below the cutting edge surface of the first moving cutting blade 70, and the cutting edge surface of the first moving cutting blade 70 corresponds to the third moving cutting blade 72. It protrudes below the blade edge surface by a predetermined distance α1.

Next, the operation of the cutting device 6 according to the sixth embodiment will be described.
Similar to the first embodiment, it is possible to achieve both fragmentation of a cut piece and prevention of scattering during cutting while securing cutting performance. Moreover, since the fixed blade frame 18 and the moving blade frame 19 can be flat, both frames can be reduced in size and weight. Further, the four corners of each cutting blade can be used as the blade part, and the life of the cutting blade can be extended.

Next, a seventh embodiment obtained by modifying the sixth embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the structure similar to Example 6. FIG. The difference from the sixth embodiment is that in the sixth embodiment, there are three fixed frame members and two moving frame members, whereas in the seventh embodiment, there are four fixed frame members and three moving frame members. This is the point.

As shown in FIG. 19, the fixed blade frame 18 includes a fixed blade tip frame member 24 (see FIG. 2), a flat plate-shaped first fixed frame member 25 extending in the length direction of the arm 4, and an arm. 4, a flat plate-like second fixed frame member 26 extending in the length direction, and a flat plate-like first intermediate frame member interposed between the first fixed frame member 25 and the second fixed frame member 26. 74, a flat second intermediate frame member 75 interposed between the first intermediate frame member 74 and the second fixed frame member 26. The first fixed frame member 25 and the first intermediate frame member 74, the first intermediate frame member 74 and the second intermediate frame member 75, and the second intermediate frame member 75 and the second fixed frame member 26. Through spaces S1, S2 and S3 are formed respectively.

The first fixed frame member 25 has an inner upper end region having a substantially U-shaped first fixed cutting blade 62, and the second fixed frame member 26 has an inner upper end region having a second fixed cutting blade 63 and a first intermediate frame member 74. The third fixed cutting blade 76 is disposed in the upper end region on the first fixed cutting blade 62 side, and the fourth fixed cutting blade 77 and the second intermediate frame member 75 are disposed in the upper end region on the second fixed cutting blade 63 side of the first intermediate frame member 74. A fifth fixed cutting blade 78 is provided in the upper end region on the fourth fixed cutting blade 77 side, and a sixth fixed cutting blade 79 is provided in the upper end region on the second fixed cutting blade 63 side of the second intermediate frame member 75 by countersunk bolts 66, 66. Each frame member is fixed.

The fixed cutting blades 62, 63, 76 to 79 are fixed to the frame members by flat bolts 66, 66. Each of the fixed cutting blades 62, 63, 76 to 79 is provided with a pair of cutting blades 67 having the same shape in a substantially square shape, and the tip fixed cutting blade 34 and the respective fixed cutting blades 62, 63, In all of 76 to 79, the cutting edge surfaces have the same height.

The moving blade frame 19 includes a flat first moving frame member 68, a flat second moving frame member 69, a flat third moving frame member 80, and a third support 50 (see FIG. 2). The fourth support portion 37 (see FIG. 2). The lower end surface 68a of the first moving frame member 68 has an outer portion protruding below the inner portion by a predetermined distance α1, and the lower end surface 69a of the second moving frame member 69 has an inner portion lower than the outer portion by a predetermined distance α1. The lower end surface 80a of the third moving frame member 80 protrudes on the second moving frame member 69 side below the first moving frame member 68 side by a predetermined distance α1.

  The first moving cutting blade 70 is located at the outer lower end region of the first moving frame member 68, the second moving cutting blade 71 is located at the outer lower end region of the second moving frame member 69, and the inner lower end region of the first moving frame member 68 is located at the inner lower end region. The third moving cutting blade 81 and the third moving frame member 80 have a lower end region on the first moving frame member 68 side, and the fourth moving cutting blade 82 and the third moving frame member 80 have a lower end region on the second moving frame member 69 side. A sixth dynamic cutting blade 84 is fixed to the inner lower end regions of the fifth dynamic cutting blade 83 and the second dynamic frame member 69 by bolts. Each of the dynamic cutting blades 70, 71, 81 to 84 is provided with a pair of cutting blades 67 having the same shape in a substantially square shape, like the fixed cutting blades.

  The relationship between the cutting edge surfaces of the respective dynamic cutting blades 70, 71, 81 to 84 is such that the cutting edge surfaces of the second to fourth dynamic cutting blades 71, 81, 82 have the same height, and the first, fifth and sixth dynamic cutting blades. The cutting edge surfaces of the blades 70, 83, and 84 have the same height, and the cutting edge surfaces of three tip-moving cutting blades (not shown) have the same height. In addition, the cutting edge surface of the tip moving cutting blade protrudes below the cutting edge surface of the first moving cutting blade 70 by a predetermined distance α2, and the cutting edge surface of the first moving cutting blade 70 is more than the cutting edge surface of the third moving cutting blade 81. Also protrudes below the predetermined distance α1.

Next, the operation of the cutting device 6 according to the seventh embodiment will be described.
Similar to the first embodiment, it is possible to achieve both fragmentation of a cut piece and prevention of scattering during cutting while securing cutting performance. Further, since the fixed blade frame 18 and the moving blade frame 19 can be formed in a flat plate shape, the size and weight can be reduced. In particular, since the object to be cut is cut at six locations, the cut pieces can be sufficiently subdivided.

Next, a modification of the cutting blade 67 will be described based on FIG.
The cutting blade 85 has a rectangular parallelepiped shape, an upper end surface 85a having a blade part at both ends, a lower end surface 85b having a blade part at both ends, and substantially cylindrical recesses 85c and 85c formed on both front and back surfaces in the center in the vertical direction. The cylindrical portion 85d connects the concave portions 85c and 85c. With this configuration, the headed bolt 86 can fasten the cutting blade 85 from the through space, and is excellent in maintainability. Further, since the plate portion of the headed bolt 86 can be accommodated in the recess 85c, it is not necessary to provide a bolt space in the frame, and both the frames 18 and 19 can be reduced in size and weight. Moreover, since the blade part is formed at the four corners, the same cutting blade 59 can be used four times by replacing the blade part.

  INDUSTRIAL APPLICABILITY The present invention can be used for all cutting devices that are mounted on an arm of an excavator excavator and perform a cutting operation of waste materials and the like, and particularly preferably used for a cutting device that requires prevention of scattering of cutting pieces. Can do.

DESCRIPTION OF SYMBOLS 1 Hydraulic excavator 4 Arm 5 Turning apparatus 6 Cutting apparatus 18 Fixed blade frame 19 Moving blade frame 20 Hydraulic cylinder 24 Fixed blade front end frame member 25 First fixed frame member 26 Second fixed frame member 27, 61 Third fixed frame member 30, 62 First fixed cutting blades 31, 63 Second fixed cutting blades 32, 64 Third fixed cutting blades 33, 65 Fourth fixed cutting blade 34 Tip fixed cutting blades 35, 68 First moving frame members 36, 69 Second moving frame Members 38 and 70 First dynamic cutting blades 39 and 71 Second dynamic cutting blades 40 and 72 Third dynamic cutting blades 41 and 73 Fourth dynamic cutting blade 42 First tip dynamic cutting blade 43 Second tip dynamic cutting blade 44 First Cutting part 45 Second cutting part 46 Third cutting part 47 Fourth cutting part 49 Pin part S1, S2 Through space

Claims (7)

A first frame attached to an arm of an excavator excavator, a plurality of first cutting blades provided in parallel to the length direction of the first frame, and swinging to the first frame via a pivot shaft A second frame that is pivotally mounted, a plurality of second cutting blades provided in parallel to the length direction of the second frame, and the first cutting blade and the first frame by a swinging motion of the second frame. In a cutting device having a plurality of cutting parts capable of cutting a cutting object by sliding contact with two cutting blades,
The plurality of cutting portions include a first cutting portion on one end side, a second cutting portion on the other end side, and at least one third cutting portion provided between the first and second cutting portions. ,
When the cutting object is cut by swinging the second frame, the cutting timing of the cutting object by the first and second cutting parts is earlier than the cutting timing of the cutting object by the third cutting part. A cutting apparatus characterized by being set as follows. A plane connecting the second cutting blade tip of the third cutting portion and the axis of the pivot shaft and a plane connecting the second cutting blade tip of the first and second cutting portions and the axis of the pivot shaft. The cutting apparatus according to claim 1, wherein a predetermined angle that generates a difference in cutting timing is formed between the cutting apparatus and the cutting apparatus. A first tip cutting blade provided at the tip of the first frame perpendicular to the length direction of the first frame;
A second tip cutting blade provided at the tip of the second frame perpendicular to the length direction of the second frame;
A tip cutting portion capable of cutting the object to be cut by sliding the first tip cutting blade and the second tip cutting blade by the swinging motion of the second frame;
When the cutting object is cut by swinging the second frame, the cutting timing of the cutting object by the tip cutting portion is earlier than the cutting timing of the cutting object by the first and second cutting portions. The cutting device according to claim 1 or 2, wherein The first frame has a predetermined space inside and is configured to accommodate the second frame in the space.
The second frame, the cutting device according to any one of claims 1 to 3, characterized in that to swing the pivot axis direction by expansion and contraction of the hydraulic cylinder which is supported by the first frame. The arm has a turning mechanism with the length direction as an axis at the tip,
The cutting apparatus according to claim 1, wherein the first frame is fixed to the turning mechanism. 6. The cutting apparatus according to claim 1, wherein the second frame has a plurality of flat plate-like second frame members, and the second frame members are connected by a connecting member. The first frame has a front end frame member, one end side frame member, the other end side frame member, and an intermediate frame member parallel to the both side frame members,
The intermediate frame member, the cutting device according to any one of claims 1 to 6, characterized in that it is supported on said distal end frame member and the pivot axis.