Core-cutting (registered trademark): A cutting device capable of breaking, fracturing, and crushing steel cores.

Abstract

We propose a cutting device that can efficiently cut and recycle rubber tracks and large tires, and further cut large discarded trees lengthwise for reuse as biomass fuel. [Solution] A cutting device for a hydraulic excavator-type cutting and crushing machine equipped with a cutting device capable of gripping and cutting waste, wherein the cutting device has a front and rear pair of clamping parts, the front and rear clamping parts are rotatable so as to be opened and closed by separate hydraulic cylinders that operate independently of each other and are mounted on a movable arm, the rear clamping part has a cutting blade for cutting the waste, the front clamping part has a parallel receiving blade to receive the cutting blade, the front clamping part has a holder for holding the waste, and the front and rear clamping parts are pivotally supported on a single common pivot.

Description

Technical Field

[0001] The present invention relates to a cutting device capable of core breakage and crushing, and particularly to a cutting device capable of core breakage and crushing that can efficiently cut rubber crawlers and large tires to make them recyclable, and can vertically cut giant trees for reuse as biomass fuel.

Background Art

[0002] In recent years, environmental issues have become extremely important factors in conducting corporate activities. Companies have a certain responsibility for the collection and recycling of products, and are required to take measures to reduce the environmental load of products in order to achieve goals such as the construction of a recycling-based society. The construction machinery industry is no exception, and various efforts are being carried out to increase the recyclability rate of construction machinery.

[0003] Non-Patent Document 1 summarizes the content of the "Recycling Promotion Action Plan for Used Construction Machinery" of the Japan Construction Machinery Industry Association. In it, it is stated that positive efforts are being made to ensure proper treatment of parts unique to construction machinery (counterweights, rubber crawlers, large tires). Among these, rubber crawlers have been regarded as difficult-to-treat parts among construction machinery with a low proportion of parts such as those difficult to recycle compared to automobiles and home appliances. On the other hand, more than 50% by weight is composed of steel, making it a valuable resource that can be recycled materially. Also, large tires have a similar composition and are valuable resources that can be recycled materially. For example, regarding the recycling of rubber crawlers, as a "method for treating waste rubber crawlers", it is stated that by treating waste rubber crawlers in a converter and recovering them as steel products, roadbed materials, and fuel gas, almost 100% can be recycled.

[0004] Furthermore, in recent years, environmental destruction due to climate change has become a very serious problem. Processing and recycling giant trees that have been washed away and discarded by heavy rains has been extremely difficult. On the other hand, if the use of discarded giant trees and other materials that have no other use can be realized as biomass fuel, it can contribute to the reduction of greenhouse gases, in order to achieve goals such as building a circular economy.

[0005] Patent Document 1 discloses a drying technology used to convert biomass from various underutilized biomass plants into fuel, including branches and leaves including the tops of trees, shrubs, bamboo, pruned branches of ornamental street trees, and soft biomass such as weeds. On the other hand, in order to recycle waste large trees as biomass fuel, it is necessary to subdivide them to a state that can be processed by Patent Document 1. [Prior art documents] [Patent Documents]

[0006] [Patent Document 1] Patent No. 7176161 [Non-patent literature]

[0007] [Non-Patent Document 1] "Current Status and Future Prospects of Recycling of Waste Rubber Crawlers - Utilization of the Wide-Area Certification System," by Kazuki Shimizu, Construction Planning '10.1 [Disclosure of the Invention] [Problems that the invention aims to solve]

[0008] However, processing rubber tracks and large tires in a converter requires an intermediate process of cutting them. In rubber tracks, a cover rubber surrounds a core metal (a block of iron) and steel cords that maintain the tension of the rubber track. In large tires, rubber surrounds a carcass consisting of bead wire (a bundle of steel cords) and steel belts. Cutting rubber tracks and large tires is an extremely difficult intermediate process, and efficient equipment has not yet been realized.

[0009] The present invention aims to propose a cutting device capable of efficiently cutting large tires and rubber tracks by breaking, fracturing, and crushing the steel core, in order to improve upon the above-mentioned problems.

[0010] Furthermore, cutting down large, discarded trees for recycling is extremely difficult, and efficient cutting equipment has not yet been developed.

[0011] To improve upon the above-mentioned problems, this invention also aims to propose a cutting device that can easily cut large, discarded trees in the vertical direction. [Means for solving the problem]

[0012] According to the present invention, the above problem is solved as follows. (1) In a cutting device of a hydraulic excavator-type cutting and crushing machine equipped with a cutting device that can grasp and cut waste, The cutting device has a front and rear pair of clamping parts, and the front and rear clamping parts are rotatable so as to be opened and closed by separate hydraulic cylinders that operate independently of each other and are mounted on a movable arm. In order to cut the waste, the rear clamping section has a cutting blade, and the front clamping section has a parallel receiving blade that receives the cutting blade. The front clamping section has a holder for holding the waste, The cutting device of a cutting and crushing machine is characterized in that the front clamping section and the rear clamping section are pivotally supported on a single common pivot.

[0013] (2) The cutting device of the cutting and crushing machine described in item (1) above, wherein the pivot pivotally supports the tip of the second movable arm, the front clamping part and the rear clamping part, and the tip of the second movable arm is pivotally supported in the center of the pivot, the front clamping part is pivotally supported on both the left and right sides thereof, and the rear clamping part is further pivotally supported on both the left and right sides thereof.

[0014] (3) A cutting device for a cutting and crushing machine, characterized in that, in the direction of item (1) or (2) above, the cutting blade of the rear clamping part and the parallel receiving blade of the front clamping part are in different directions and approach each other at different speeds and intersect.

[0015] (4) In the direction of item (1) or (2) above, the cutting device of a cutting and crushing machine is characterized in that one end of the pivot is secured to one end of the rear clamping portion via a nut, and the side end face of the cap-shaped pressing member abuts against the other end of the rear clamping portion, and the pressing member is bolted to the other end of the pivot via an adjustment shim that is detachably inserted between its inner end face and the other end of the pivot.

[0016] (5) The cutting device of the cutting and crushing machine described in item (1) above is characterized in that the cutting blade is a single-edged blade having a blade on the parallel receiving blade side, the parallel receiving blade has a rectangular cross-section, and the cutting blade and the parallel receiving blade mesh together without any gap.

[0017] (6) The cutting device of the cutting and crushing machine described in item (1) above is characterized in that the cutting blade is crescent-shaped and curves toward the rear, and the parallel receiving blade is curved toward the front.

[0018] (7) The cutting device of a cutting and crushing machine, characterized in that, in the rear clamping section of item (1) or (2) above, a first cylindrical steel material and a second cylindrical steel material are provided as reinforcing members of the cutting device.

[0019] (8) In the above (1) or (2), in order to prevent the over-rotation of the front clamping portion and the rear clamping portion, an over-rotation stopper or a first cylindrical steel material is provided for each of the front clamping portion or the rear clamping portion in the cutting device. The cutting device of the cutting crusher is characterized in that.

[0020] (9) When cutting the waste using the cutting device of the cutting crusher according to the above (1) or (2), when the waste contains a steel core bundling steel wires, steel cords, etc., the steel core is covered with a resin such as rubber. The waste is characterized in that.

[0021] (10) A method for repairing the cutting blade and the parallel receiving blade, wherein the repair of the cutting blade and the parallel receiving blade is carried out by overlaying with a welding rod for overlaying with a hardness of HF300 to 800, and the overlaying portion is polished for repair. It is the repair method of the said cutting blade and the said parallel receiving blade characterized by the above-mentioned. [Effect of the Invention]

[0022] According to the present invention, the following effects can be achieved. In a hydraulic excavator type cutting crusher equipped with a cutting device, the pivot of the cutting device is tightened with an appropriate specified torque. Therefore, a force is applied to both the front clamping portion and the rear clamping portion pivotally supported by this pivot so as to push the tip of the second movable arm pivotally supported at the center of the pivot from both sides. Further, a force is applied to the rear clamping portion so as to push the front clamping portion from both sides in the same manner. When the rear clamping portion pushes the front clamping portion from both sides in a state of being pivotally supported by the pivot, the side plates (9) on both sides of the front clamping portion are pushed inward by that force, and the reinforcing plates on both sides are pushed inward through the holder, and finally the parallel receiving blade is pushed inward. As a result, the parallel receiving blade (17A) is positioned without a gap with respect to the cutting blade (17B), so that the parallel receiving blade and the cutting blade can mesh with each other so as to slide. By rotating the parallel receiving blade and the cutting blade in this state, large tires and rubber crawlers can be efficiently cut, and furthermore, waste giant trees can be easily cut in the vertical direction. [Brief explanation of the drawing]

[0023] [Figure 1] This is an overall perspective view of a hydraulic excavator-type cutting and crushing machine equipped with the cutting device of the present invention. [Figure 2] Figure 1 is an enlarged perspective view of the cutting device located at the tip of the cutting and crushing machine. [Figure 3] Figure 2 is a side view of the front and rear clamping sections of the cutting device in the closed state. [Figure 4] Figure 3 shows a longitudinal cross-sectional view along line IV-IV. [Figure 5] This is a perspective view of a cutting device in which the front clamping section holds a large tree and the rear clamping section cuts the tree lengthwise. [Figure 6] This photograph shows the storage conditions for large tires and rubber tracks. [Figure 7] This is a diagram showing the cross-sectional shape of a large tire. [Figure 8] This is a perspective view of a cutting device in which the front clamping section holds a large tire. [Figure 9] This photograph shows the cut area of ​​a large tire, including the bead wire, which was cut using a cutting device. [Figure 10] This is a perspective view showing a rubber track. [Figure 11] This is a perspective view showing the process of cutting a rubber track with a cutting blade. [Best Mode for Carrying Out the Invention]

[0024] Hereinafter, embodiments of the cutting apparatus of the cutting and crushing machine of the present invention will be described with reference to the drawings. In each figure, the same parts are denoted by the same reference numerals. In the following explanation, the right side of Figure 1 will be considered the front, the left side the rear, the direction perpendicular to the front-to-back direction will be considered the up-and-down direction, and the direction rotated 90° horizontally from the front-to-back direction will be considered the left-to-right direction.

[0025] As shown in Figure 1, the front of the hydraulic excavator-type cutting and crushing machine (1) is provided with a first movable arm (3) that rotates vertically by the extension and retraction of a pair of first hydraulic cylinders (2) on the left and right, and a second movable arm (5) whose rear end is articulated to the front end of the first movable arm (3), and which rotates in the front-rear direction by the extension and retraction of a second hydraulic cylinder (4). A cutting device (6) for supporting and cutting discarded large trees is attached to the tip of this second movable arm (5).

[0026] As shown in Figures 2 and 3, the cutting device (6) includes a pair of front and rear clamping parts (8A) and rear clamping parts (8B) pivotally supported by a pivot (7) that is inserted through the tip of the second movable arm (5) and faces left and right.

[0027] The front clamping section (8A) has a pair of left and right side plates (9) with a roughly crescent shape. Inside these side plates (9) are a pair of reinforcing plates (10) to which parallel receiving blades (17A) are welded. The central part of these side plates (9) and reinforcing plates (10) curves forward, and the lower part extends backward, with a holder and cutting edge provided in this extended portion. The cutting edge (13) and holder (13A) are components that allow large tires, discarded large trees, etc., to be held in the front clamping section (8A) (see Figures 5 and 8).

[0028] Specifically, the cutting edge (13) and holder (13A) of the front clamping section (8A) secure the large tire and the discarded large tree, and the cutting blade (17B) of the rear clamping section (8B) bites into the large tire and the discarded large tree to cut the large tire and cut the discarded large tree lengthwise. This operation is repeated to cut the large tire and the discarded large tree to the desired size.

[0029] The tip of a folding link mechanism (11), whose base is pivotally supported on the front part of the second movable arm (5), is pivotally supported on the front part of the upper end of the front clamping section (8A). The tip of a third hydraulic cylinder (12), which is a rotating means for the front clamping section (8A), is pivotally supported on the joint in the middle part of the folding link mechanism (11), and the front clamping section (8A) can be rotated in the front-rear direction by the extension and retraction of the third hydraulic cylinder (12).

[0030] In the cutting device of the hydraulic excavator-type cutting and crushing machine according to the present invention, the pivot (7) pivotally supports the tip of the second movable arm (5), the rear upper end of the front clamping part (8A), and the front upper end of the rear clamping part (8B). The tip of the second movable arm (5) is pivotally supported in the center of the pivot (7), the rear upper ends of the front clamping part (8A) are pivotally supported on both the left and right sides of the tip of the second movable arm (5), and the front upper ends of the rear clamping part (8B) are pivotally supported on both the left and right sides of the rear upper ends of the front clamping part (8B).

[0031] On the other hand, in conventional hydraulic excavator-type cutting and crushing machines, the pivot (7) only supports the tip of the second movable arm (5) and the front clamping section (8A), while the rear clamping section (8B) is not pivotally supported. In the cutting device according to the present invention, the pivot (7) also supports the rear clamping section (8B). The effects of adopting this configuration will be described later.

[0032] The rear clamping section (8B) is formed by welding three steel plates together to ensure its strength, with a cutting edge (17B) provided on the central steel plate. That is, the two steel plates on the left and right support the central steel plate equipped with the cutting edge (17B). The front upper end of the rear clamping section (8B) is pivotally supported by the pivot (7), and its lower end has an acute-angled, pointed shape, while the front edge of the central steel plate is recessed in an arc shape, giving it a crescent-shaped cutting edge (17B) in side view. Here, the cutting edge (17B) is single-edged, and when cutting large tires or discarded large trees, this single-edged blade engages seamlessly with the parallel receiving blade (17A) provided on the front clamping section (8A) (see Figure 4).

[0033] A parallel receiving blade (17A) that receives the cutting edge (17B) is fixed to the reinforcing plate (10) of the front clamping section (8A) by welding. This parallel receiving blade (17A) is curved forward and has a rectangular cross-section, and is configured to mesh with the cutting edge (17B) without any gaps.

[0034] The base end of the fourth hydraulic cylinder (18), which forms the rotational means of the rear clamping section (8B), is pivotally supported on the middle part of the second movable arm (5), and the tip of the fourth hydraulic cylinder (18) is pivotally supported on the rear upper end of the rear clamping section (8B).

[0035] In other words, when the third hydraulic cylinder (12) of the cutting device (6) described above is extended or retracted, the front clamping section (8A) is rotated in the front-rear direction, and when the fourth hydraulic cylinder (18) is extended or retracted, the rear clamping section (8B) is rotated in the front-rear direction. When the front clamping section (8A) is rotated to its maximum rearward position and the rear clamping section (8B) is rotated to its maximum forward position, the rear clamping section (8B) is inserted between the pair of reinforcing plates (10) of the front clamping section (8A) and protrudes forward (see Figure 3). The front clamping section (8A) can be rotated by approximately 150° by the third hydraulic cylinder (12), and the rear clamping section (8B) can be rotated by approximately 150° by the fourth hydraulic cylinder (18).

[0036] For example, if the stroke of the cutting blade (17B) of the rear clamping section (8B) is 700 mm and the stroke of the parallel receiving blade (17A) of the front clamping section (8A) is 550 mm, the cutting blade (17B) will clamp against the parallel receiving blade (17A) at a faster speed, and after clamping, the cutting blade (17B) will separate from the parallel receiving blade (17A) at a faster speed. By having a configuration in which the cutting blade (17B) and the parallel receiving blade (17A) approach and intersect each other in different directions and at different speeds, the cutting blade (17B) and the parallel receiving blade (17A) can interlock smoothly without any gaps, making it possible to easily cut large tires and easily cut discarded large trees in the vertical direction.

[0037] Furthermore, to prevent over-rotation of the front clamping section (8A) and the rear clamping section (8B), over-rotation stoppers (15)(15) and a first cylindrical steel member (16) are provided (see Figure 2). The over-rotation stoppers (15)(15) prevent over-rotation of the front clamping section (8A) and the rear clamping section (8B) by receiving the first cylindrical steel member (16).

[0038] Here, the first cylindrical steel member (16), along with the second cylindrical steel member (19), is originally provided as reinforcement to prevent the side plates (9) and reinforcing plates (10) of the front clamping section (8A) from opening in the left-right direction when the cutting device (6) is cutting, for example, large tires or discarded large trees. If the side plates (9) and reinforcing plates (10) open in the left-right direction, it becomes difficult for the cutting blade (17B) and the parallel receiving blade (17A) to engage without gaps when cutting large tires or discarded large trees, and the cutting of large tires or discarded large trees will not be performed smoothly. The first cylindrical steel member (16) and the second cylindrical steel member (19) are provided to prevent this.

[0039] Figure 4 shows a longitudinal section of line IV-IV in Figure 3. Specifically, it shows a configuration in which the front clamping section (8A) and the rear clamping section (8B) are pivotally supported by the pivot (7). The cutting blade (17B) at the tip of the rear clamping section (8B) is inserted between a pair of reinforcing plates (10) of the front clamping section (8A) and protrudes forward (see Figure 3). The cutting blade (17B) and the parallel receiving blade (17A) are configured to have no gap between them. In this state, when both the front and rear clamping sections (8A) and (8B) are rotated in a direction that brings them closer to each other, the cutting blade (17B) and the parallel receiving blade (17A) engage smoothly and without gap, allowing large tires to be easily cut and discarded large trees to be easily cut longitudinally.

[0040] In conventional hydraulic excavator-type cutting and crushing machines, the pivot (7) supported only the tip of the second movable arm (5) and the front clamping section (8A), while the rear clamping section (8B) was not pivotally supported. The configuration in which the pivot (7) supports not only the front clamping section (8A) but also the rear clamping section (8B) is a newly created configuration to better achieve the effect of the cutting blade (17B) and the parallel receiving blade (17A) interlocking smoothly without any gaps.

[0041] Using Figure 4, we will explain the reason why the cutting edge (17B) and the parallel receiving edge (17A) can interlock smoothly without any gaps. The pivot (7) is tightened with the appropriate specified torque. Therefore, both the front clamping part (8A) and the rear clamping part (8B), which are pivotally supported by the pivot (7), are subjected to forces that push from both sides onto the tip of the second movable arm (5), which is pivotally supported at the center of the pivot (7). Similarly, the rear clamping part (8B) is subjected to forces that push from both sides onto the front clamping part (8A).

[0042] With the pivot (7) supporting the front clamping section (8A), the rear clamping section (8B) pushes the front clamping section (8A) from both sides. This force pushes the side plates (9) on both sides of the front clamping section (8A) inward, and the reinforcing plates (10) on both sides are pushed inward via the holder (13A), ultimately pushing the parallel receiving blade (17A) inward. As a result, the parallel receiving blade (17A) is positioned without any gaps against the cutting blade (17B), allowing the parallel receiving blade (17A) and the cutting blade (17B) to engage smoothly. In this state, the rotation of the parallel receiving blade (17A) and the cutting blade (17B) allows for easy cutting of large tires and easy cutting of discarded large trees in the longitudinal direction.

[0043] The pivot (7) is adjusted using a thickness gauge so that the gap between it and the object it pivots is 0.1 mm to 0.15 mm, and is tightened to the appropriate specified torque. However, with prolonged use, the gap (play) increases, causing problems such as increased noise. The pivot (7) shown in Figure 4 has one end of the pivot (7) secured to one end of the front upper end of the rear clamping part (8B) via a nut (63), and the side end face of the cap-shaped pressing member (61) abuts against the other end of the front upper end of the rear clamping part (8B). The pressing member (61) is bolted with a bolt (62) via an adjustment shim (65) that is detachably inserted between its inner end face and the other end of the pivot (7). With this configuration, even if the play increases, the adjustment shim can be replaced and adjusted simply by removing the cap-shaped pressing member (61) without removing the pivot (7).

[0044] Furthermore, a nut stopper (64) is provided to prevent the nut (63) of the pivot (7) from rotating while the cutting device (6) is in operation. In addition, a box-type reinforcing box (14) made of high-tensile steel is welded to the front clamping section (8A) to reinforce it (see Figures 2 and 5).

[0045] The following describes the operation of the cutting and crushing machine (1) of the present invention in cutting discarded large trees, with reference to Figure 5.

[0046] Figure 5 shows the cutting device with the front clamping section holding the discarded tree. For the cutting device (6) to hold the discarded tree as shown in Figure 5, first the third hydraulic cylinder (12) is operated to bring the tip of the front clamping section (8A) closer to the discarded tree and to grip it. Next, the fourth hydraulic cylinder (18) is operated to slowly push the discarded tree forward with the rear clamping section (8B) until it catches on the cutting edge (13) of the front clamping section (8A). This operation results in the discarded tree being held by the front clamping section (8A), as shown in Figure 5.

[0047] With the front clamping section (8A) shown in Figure 5 holding the discarded large tree, the rear clamping section (8B) is rotated toward the front clamping section (8A) by operating the fourth hydraulic cylinder (18). This causes the cutting blade (17B) of the rear clamping section (8B) and the parallel receiving blade (17A) of the front clamping section (8A) to interlock smoothly and without gap, allowing the discarded large tree to be easily cut lengthwise. In particular, shredding discarded large trees lengthwise is a specialty of the cutting device (6) of the cutting and crushing machine (1) according to the present invention.

[0048] The operation of the cutting and crushing machine (1) of the present invention to cut large tires and extra-large tires (50) will be described below with reference to Figures 6 to 9. Figure 5 is a photograph showing the storage conditions of large tires (50) and rubber tracks (70). The discarded large tires and rubber tracks are piled up in the open at the storage location. Since the cutting and crushing machine (1) is self-propelled, it can access the storage location of the large tires (50) and perform the cutting operation.

[0049] Figure 7 shows the cross-sectional shape of a large tire. Large tires (50) can have an outer diameter exceeding 1.5m and weigh over 100kg. The bead wire (51) is a reinforcing member made of a steel core of bundled steel wires covered with rubber, with an outer diameter of approximately 50mm. The carcass (52) is a structure made of steel belts covered with rubber to suppress the expansion of the rotating tire due to centrifugal force and to create an ideal contact shape for the tread (56), which is the part of the tire that touches the ground. The belt (53) uses steel cords to tighten the carcass in order to flatten the tread (56). In this way, a large amount of steel is used in large tires (50). The metal wheel (54) and valve (55) that maintain the shape of the tire are removed beforehand before cutting.

[0050] Figure 8 shows the cutting device (6) with the front clamping section holding the large tire. For the cutting device (6) to hold the large tire (50) as shown in Figure 8, first, the third hydraulic cylinder (12) is operated at the storage location shown in Figure 5 to pass the tip of the front clamping section (8A) inside the large tire (50) and lift the large tire (50). Next, the fourth hydraulic cylinder (18) is operated to slowly push the large tire (50) forward with the rear clamping section (8B) until the large tire (50) is caught on the cutting edge (13) and holder (13A) of the front clamping section (8A). This operation results in the large tire (50) being held by the front clamping section (8A), as shown in Figure 8.

[0051] With the front clamping section (8A) shown in Figure 8 holding the large tire (50), the third hydraulic cylinder (12) and the fourth hydraulic cylinder (18) are rotated in a direction that brings the rear clamping section (8B) and the front clamping section (8A) closer together. When this is done, the cutting blade (17B) of the rear clamping section (8B) and the parallel receiving blade (17A) of the front clamping section (8A) engage smoothly and without gap, allowing the large tire to be easily cut.

[0052] Furthermore, cutting extra-large tires with a diameter of 2.3m or more is difficult when the rear clamping section (8B) is cutting while the front clamping section (8A) is holding the large tire, as shown in Figure 8. Therefore, the front clamping section (8A) partially supports the extra-large tire (50) placed on the ground, and the rear clamping section (8B) cuts that portion. Then the tire (50) is rotated and the cutting operation is repeated, and the entire circumference of the extra-large tire (50) is cut in several cutting operations. After that, the cut tire is turned over, spread out, and cut into recyclable sizes.

[0053] Figure 9 is a photograph showing the cut area of ​​a large tire (50) cut by the cutting device (6). The bead wire 51, which is a bundle of steel wires with an outer diameter of about 50 mm, and the carcass (52), which is a structure in which a steel core such as a steel belt is covered with rubber, are cleanly cut as if cut with air. Neither the cutting blade (17B) of the rear clamping part (8B) nor the parallel receiving blade (17A) of the front clamping part (8A) show any chipping. From experience, however, if the steel core is not covered with rubber, it is extremely difficult to cut the steel core even when using the cutting device (6) according to the present invention.

[0054] Here, we will explain the phenomenon by which the cutting blade (17B) and parallel receiving blade (17A) of the cutting device (6) of the cutting crusher (1) according to the present invention can easily cut the steel core, which is a bundle of steel wires contained in large tires (50) and rubber crawlers (60). The cutting blade (17B) and the parallel receiving blade (17A) can be moved independently. Furthermore, the cutting blade (17B) is a single-edged blade, and during cutting, this single-edged blade is structured to mesh with the parallel receiving blade (17A) without any gap. For this reason, during cutting, the cutting blade (17B) and the parallel receiving blade (17A) mesh smoothly, and it is thought that high pressure is generated at the tips of both blades. It is thought that this high pressure causes the steel core, which is a bundle of steel wires, to break or snap instantly rather than be cut instantly. In fact, the bundle of steel wires breaks or snaps with a clean "snip" sound. Note that the target of cutting is a steel core, which is a bundle of steel wires, that is covered with rubber. Large tires (50) and rubber tracks (60) are suitable targets for cutting. As shown in Figure 9, the clean cut surface of the bead wire (51), which is a bundle of steel wires acting as a steel core, demonstrates that the above explanation is understandable.

[0055] Figure 10 shows the structure of a rubber track. The rubber track (70) consists of steel cords (72) that maintain tension, core metals (71) that reinforce them, and a cover rubber (73) that encloses them. The core metals (71) are blocks of steel that account for 50-60% of the total weight of the rubber track (70), and the core metals (71) are arranged in narrow gaps within the cover rubber (73). Therefore, the intermediate processing of cutting the rubber track as a preliminary step to recycling has been extremely difficult.

[0056] On the other hand, as shown in Figures 4 and 11, the cutting device (6) of the cutting crusher (1) according to the present invention has a small cutting blade (17B) thickness in the rear clamping section (8B), so it can easily cut even between core metals (71) arranged in narrow gaps, as shown in Figure 11. The cutting blade (17B) according to the present invention can easily cut through a steel core, which is a bundle of steel cords (72) covered with cover rubber (73), and does not cause chipping of the blade. In this way, rubber crawlers can be cut more efficiently and inexpensively than with conventional cutting crushers.

[0057] Here, we will explain the repair method for the cutting blade (17B) and the parallel receiving blade (17A). In conventional cutting devices for large tires and rubber tracks, when repairs were needed, the entire blade assembly had to be replaced. Therefore, when attaching the blade assembly to the cutting device, it was necessary to have a removable structure. Furthermore, because the entire blade assembly had to be replaced, maintenance costs were high. In this invention, when repairs are needed for the cutting blade (17B) or the parallel receiving blade (17A), the repair area is built up using an HF300-800 welding rod, and this built-up area is then polished. As a result, there is no need to replace the cutting blade or parallel receiving blade that needs repair, and it can be used semi-permanently. Therefore, maintenance costs can be significantly reduced. Note that HF300 is a welding rod for hard facing, is 30% chromium-based, and can reduce wear and deformation of moving parts, thereby extending the lifespan.

[0058] Furthermore, the cutting device (6) of the cutting and crushing machine (1) according to the present invention can also address the following problem. Currently, Japan is experiencing depopulation due to a declining population. Farmlands, in particular, are falling into disrepair in rural areas. In particular, bamboo is causing widespread damage. Bamboo reproduces rapidly, and its roots spread throughout the ground in no time, requiring enormous effort to cut these roots. The cutting device (6) of the cutting and crushing machine (1) according to the present invention is equipped with a cutting edge (13) at its tip, making excavation and root removal easy. It can remove bamboo roots, shake off soil, and cut the bamboo simultaneously. The removed bamboo has a high calorific value and is suitable for biomass power generation. It can also be crushed and effectively utilized as feed for cattle and horses, bedding straw, fertilizer, etc.

[0059] Furthermore, by using the cutting device (6) of the present invention, wheels can be efficiently removed from tires with wheels attached. Projections serving as covers for protecting the cutting edges are attached to the cutting blade (17B) and the parallel receiving blade (17A). In this state, the front clamping part (8A) and the rear clamping part (8B) are operated, and the outer circumference of the tire with wheel attached is clamped with the projections, causing the wheel to deform and come off the tire. With this operation, more than 10 wheels can be removed from tires per minute.

[0060] In addition to the above, the cutting device of the present invention can easily and efficiently perform tasks such as moving materials to designated locations within a factory or unloading goods from trucks as a forklift; excavating, removing stumps, and clearing trees for land development in the construction of residential areas, factory sites, and road sites as civil engineering machinery; and cutting waste wood, tatami mats, tires, etc., which are to be incinerated, before feeding them into an incinerator at an industrial waste disposal site.

[0061] As described above, the cutting device (6) of the cutting and crushing machine (1) according to the present invention can efficiently recycle large trees, tree roots, etc. generated in regional development and construction work, as well as driftwood generated by global warming and extreme weather, waste wood generated from housing destruction, and rubber tracks and large tires, which are parts unique to construction machinery, as metal resources and fuel. [Explanation of Symbols]

[0062] (1) Cutting and crushing machine (2) First hydraulic cylinder (3) First movable arm (4) Second hydraulic cylinder (5) Second movable arm (6) Cutting device (7) Axis (8A) Front clamping part (8B) Rear clamping section (9) Side panels (10) Reinforcement plate (11) Folding link mechanism (12) Third hydraulic cylinder (13) Cutting edge (13A) Holder (14) Reinforcement box (15) Over-speed stopper (16) First cylindrical steel bar (17A) Parallel receiving blade (17B) Cutting blade (18) Fourth hydraulic cylinder (19) Second cylindrical steel bar (40) Giant tree (50) Large tires, extra-large tires (51) Bead wire (52) Carcass (53) Belt (54) Wheel (55) Valve (56) Tread (61) Pressing member (62) Bolt (63) Nut (64) Nut locking mechanism (65) Adjustment shim (70) Rubber crawler (71) Core (72) Steel cord (73) Cover rubber

Claims

1. In a cutting device of a hydraulic excavator-type cutting and crushing machine equipped with a cutting device that can grasp and cut waste, The cutting device has a front and rear pair of clamping parts, and the front and rear clamping parts are rotatable so as to be opened and closed by separate hydraulic cylinders that operate independently of each other and are mounted on a movable arm. In order to cut the waste, the rear clamping section has a cutting blade, and the front clamping section has a parallel receiving blade that receives the cutting blade. The front clamping section has a holder for holding the waste, A cutting device for a cutting and crushing machine, characterized in that the front clamping section and the rear clamping section are pivotally supported on a single common pivot.

2. The cutting device for a cutting and crushing machine according to claim 1, characterized in that the pivot pivotally supports the tip of the second movable arm, the rear upper end of the front clamping part, and the front upper end of the rear clamping part, and the tip of the second movable arm is pivotally supported in the center of the pivot, the rear upper ends of the front clamping part are pivotally supported on both the left and right sides thereof, and the front upper ends of the rear clamping part are further pivotally supported on both the left and right sides thereof.

3. The cutting device for a cutting and crushing machine according to claim 1 or 2, characterized in that the cutting blade of the rear clamping section and the parallel receiving blade of the front clamping section are configured to intersect each other in different directions and at different speeds.

4. The cutting device for a cutting and crushing machine according to claim 1 or 2, characterized in that one end of the pivot is secured to one end of the rear clamping portion via a nut, and the side end face of the cap-shaped pressing member abuts against the other end of the rear clamping portion, and the pressing member is bolted to the other end of the pivot via an adjustment shim that is detachably inserted between its inner end face and the other end of the pivot.

5. The cutting device for a cutting and crushing machine according to claim 1, characterized in that the cutting blade is a single-edged blade having a blade on the parallel receiving blade side, the parallel receiving blade has a rectangular cross-section, and the cutting blade and the parallel receiving blade mesh without any gap.

6. The cutting device for a cutting and crushing machine according to claim 1, characterized in that the cutting blade is crescent-shaped and curves toward the rear, and the parallel receiving blade is curved toward the front.

7. The cutting device for a cutting and crushing machine according to claim 1 or 2, characterized in that a first cylindrical steel material and a second cylindrical steel material are provided as reinforcing members for the cutting device in the rear clamping section.

8. The cutting device for a cutting and crushing machine according to claim 7, characterized in that the cutting device is provided with an over-rotation stopper on the front clamping section and the first cylindrical steel material on the rear clamping section in order to prevent over-rotation of the front clamping section and the rear clamping section.

9. In a case where the waste is cut using the cutting device of a cutting and crushing machine described in claim 1 or 2, the waste is characterized in that, when the waste includes a steel core made of bundled steel wire, steel cord, etc., the steel core is covered with a resin such as rubber.

10. A method for repairing the cutting edge and the parallel receiving edge, characterized in that the repair of the cutting edge and the parallel receiving edge is performed by building up the material with a hardening welding rod of HF300 to 800, and then polishing the built-up portion.

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