JP6789254B2 - Dismantling shearing machine and dismantling shearing machine piercing tip insert and nose tip structure - Google Patents

Description

(not listed)

The structure of the piercing tip insert and nose tip that can withstand the force applied to the piercing tip insertion body by suppressing the wear of the nose tip even when it is clogged or the insertion body at the piercing tip is caught. A equipped shearing machine for dismantling is needed.

U.S. Pat. No. 7,216,575

FIG. 1 is a perspective view on the right side (viewed from the position of the operator) of one embodiment of the shearing machine attachment for dismantling. FIG. 2 is a left perspective view of the shearing machine attachment for dismantling of FIG. FIG. 3 is a diagram illustrating the shearing machine attachment of FIG. 1 at a general operation position showing the movement of the upper jaw with respect to the lower jaw during the shearing operation. FIG. 4 is an exploded perspective view of the turning shaft of the jaw of the shearing machine attachment of FIG. FIG. 5 is an enlarged view of FIG. 1 showing a shearing machine attachment. FIG. 6 is the same view as that of FIG. 5, but the blade insert and the piercing tip insert are removed. FIG. 7 is an enlarged view of FIG. 2 showing the jaw of the shearing machine attachment. FIG. 8 is a perspective view of the lower jaw of FIG. 1, and shows the insertion body of the shear blade on the blade side and the insertion body of the guide blade more clearly except for the upper jaw. FIG. 9 is another perspective view of the lower jaw excluding the upper jaw of FIG. 1, and shows a guide blade insertion body and a horizontal blade insertion body on the guide side. FIG. 10 is the same view as that of FIG. 7, in which the blade insert and the piercing tip insert are removed. FIG. 11 is the same view as the lower jaw of FIG. 9, with the blade insert removed. 12A and 12B show various views of an embodiment of a shear blade insert, 12A is a front perspective view, 12B is a front view, 12C is an end view, and 12D is a rear view. 13A and 13B show various views of an embodiment of a guide blade insert, 13A is a front perspective view, 13B is a front view, 13C is an end view, and 13D is a rear view. 14A and 14B show various views of an embodiment of a horizontal blade insert, 14A is a front perspective view, 14B is a rear perspective view, 14C is an end view, 14D is a front view, and 14E is a rear view. .. FIG. 15 shows various views of an embodiment of a half-part at the tip of a piercing blade, 15A is a front perspective view, 15B is a rear perspective view, 15C is a front end view, 15D is an outer front view, and 15E. Is an inside front view. FIG. 16 shows various views of an embodiment of a semi-part of the piercing tip on the guide side, 16A is a front perspective view, 16B is a rear perspective view, 16C is a front end view, 16D is an inner front view, 16E. Is an outer front view. FIG. 17 is a perspective view showing the upper jaw of the shearing machine attachment of FIG. 1 alone, and shows a state in which the insertion body at the piercing tip is disassembled from the attachment base at the tip of the nose. FIG. 18 is an enlarged side view of the upper jaw and the lower jaw of the shearing machine attachment of FIG. 1, in which the upper jaw is in a completely open position. FIG. 19 is an enlarged side view of the upper jaw and the lower jaw of the shearing machine attachment of FIG. 1, in which the upper jaw is in a partially closed position. FIG. 20 is an enlarged side view of the upper jaw and the lower jaw of the shearing machine attachment of FIG. 1, and is a state immediately before the upper jaw enters the elongated groove of the lower jaw. FIG. 21 is an enlarged side view of the upper jaw and the lower jaw of the shearing machine attachment of FIG. 1, in which the upper jaw is completely closed and enters the elongated groove of the lower jaw. FIG. 22 is an enlarged side view of the upper jaw and the lower jaw, showing the force applied to the piercing tip in the hooked state. FIG. 23 is an enlarged side view of the upper jaw and the lower jaw, and shows the force applied to the piercing tip in another hooked state. FIG. 24 is an enlarged side view of the upper jaw and the lower jaw, and illustrates the force applied to the piercing tip when the upper end of the piercing tip is caught due to wear of the base material of the nose tip of the upper jaw. There is.

In the drawings, the same or similar parts are shown with the same reference number throughout several figures. With reference to the drawings, FIGS. 1 and 2 are perspective views from the right and left sides (as viewed from the operator's position) of the embodiment of the shearing machine attachment 10 for dismantling, respectively. The shearing machine attachment 10 has a body 12 with a front end 14 and a rear end 16. As can be recognized and understood by those skilled in the art, the rear end 16 can be operably attached to the boom or arm 18 of the excavator (FIG. 3) by means of a swivel attachment 19 or other suitable attachment attachment or the like. It has a structure like this. The front end 14 of the main body 12 has a movable upper jaw 40 and a fixed lower jaw 42 (details will be described later).

3A-3C show the shear attachment 10 attached to the boom or arm 18 of the excavator. These are in general motion positions and illustrate the movement of the upper jaw 40 closing relative to the lower jaw 42 on the shearing object 11. The object 11 to be sheared is a structural member such as I-shaped steel, channel steel, steel plate, steel pipe, metal scrap, material such as a metal plate, or an object suitable for handling or processing by a shearing machine for dismantling. It can be used as a material.

Referring to FIGS. 1 to 4, the main body 12 of the shearing machine attachment generally includes steel side plates 20, 22, top plate 24, bottom plate 26, which are combined to form a substantially enclosed space. Forming, the hydraulic actuator 30 (FIGS. 3A to 3C) of the shearing machine attachment 10 and other hydraulic components are substantially enclosed and protected in this space. The hydraulic actuator 30 is fixed by the fulcrum pin 32 of the actuator in a swivel state at the rear end in the main body 12. The fulcrum pin 32 of the actuator is passed through the side plates 20 and 22, the internal reinforcing plate (not shown), and the clevis 34 of the cylinder rod. The front end of the hydraulic actuator 30 is attached to the movable upper jaw 40 in a state where it can be swiveled by the cylinder pin 36, and the cylinder pin 36 is passed through the clevis 38 of the cylinder body and the hole 39 of the cylinder pin (see also FIG. 17 ). Therefore, as a matter of course, as shown in FIGS. 3A to 3C, the upper jaw 40 expands and contracts with respect to the longitudinal axis of the jaw swivel shaft assembly 60 (described later) while the hydraulic actuator 30 expands and contracts. It rotates to open and close the upper jaw 40 with respect to the lower jaw 42. An inspection window (FIG. 2) with an inspection cover 25 is provided on the top plate so that the inside of the main body 12 can be touched for installation, maintenance, repair, and repair of the hydraulic actuator of the hydraulic system and other parts. It is also possible to.

As can be best seen in FIGS. 4, 8 and 9, there are hub holes 48 and 50 in the jaw protrusions 44 and 46 on both sides of the front end 14 of the main body 12. The jaw swivel shaft assembly 60 inserted into the hub holes 48, 50 and the swivel shaft hole 54 (see FIG. 17) supports the maxilla 40 in a swivel state.

The jaw swivel shaft assembly 60 includes flanged bearings 56, 58 that fit into the hub holes 48, 50. The spindle 62 is press-fitted into the hole 54 of the swivel shaft so as to rotate with the upper jaw 40. The spindle 62 has a central hole 64 into which the connecting rod 66 having the threaded end 68 is inserted. The end caps 70 and 72 are fixed to the flanged bearings 56 and 58 with threaded joints, which are inserted into the same holes on the flanged bearings 56 and 58. It is screwed into the female screw holes provided at the same positions on the hubs 44 and 46. The nut 74 of the connecting rod is screwed into the threaded end 68 of the connecting rod 66. The nut 74 of the connecting rod is fixed to the end caps 70 and 72 by screwing a screw type joint into the female screw holes provided at the same positions on the flanged bearings 56 and 58. As a matter of course, the connecting rod 66 and the nut 74 of the connecting rod prevent the hub holes 48 and 50 from moving laterally against the lateral force applied to both jaws during the shearing operation.

As can be best seen in FIGS. 4 and 8, as disclosed in US Pat. No. 7,216,575, a disk assembly 80 is provided to stabilize the jaw so that it does not move laterally, and with this. By providing a wear plate or a wear surface 82 (FIG. 17) corresponding to one or both sides of the adjacent maxilla 40, the lateral direction of the maxilla 40 (described later) until the maxilla enters the elongated groove 96 of the mandible 42 during the shearing operation. It is also possible to suppress the movement to.

Referring to FIGS. 5 to 11, the mandible 42 extends forward and is spaced laterally and substantially parallel to the jaw members 90 and 92, and is spaced laterally and is spaced 92 from the front end of the jaw member 90. It is provided with a horizontal member 94 bridged so as to cross between the front end of the and the cross member 94. The laterally spaced jaw members 90, 92 and the lateral members 94 combine to form an elongated groove 96 that accepts the maxilla 40 during the shearing process (see FIGS. 3C and 4). Although described in more detail below, jaw members 90 extending forwardly has a structure such as to plug the plug of shearing blades, this is hereinafter referred to as jaw members 90 of the blade side. The other jaw member 92 extending anteriorly serves to provide structural rigidity to the lower jaw and restricts the movement of the upper jaw in the lateral direction during the shearing process so that the upper jaw enters the elongated groove 96. In the following, this is referred to as a guide-side jaw member 92.

As can be best seen in FIG. 10, there is a shear blade mount 100 inside the jaw member 90 on the blade side, which is a set of 110 sets of shear blade inserts made of hardened steel (FIG. 7). It has a structure that allows the insertion of FIG. 8). An example of the insertion body 110 of the shear blade is shown in FIG. Each set of shear blade inserts 110 has generally flat and vertical wear surfaces 114 and 116 and generally flat and horizontal wear surfaces 118 and 120, respectively. The straight portion where the vertical worn surface and the horizontal worn surface intersect forms the cutting edge 122 of the four shear blades. The shear blade insert 110 has parallel inclined end faces 124 and 126 to form a parallelogram shape, and the shear blade insert 110 is placed in the correct position and in the correct orientation on the shear blade mounting base 100. Then, the adjacent end faces are applied to each other at the downward corners (see FIGS. 7 and 8). As a matter of course, since the insertion bodies 110 of the set of shear blades have the same shape of parallel hexahedrons, they are arranged to rotate with respect to each other in the shear blade mounting base 100 and are in use. Even if the cutting edge of the shearing blade is worn, all four cutting edges of the shearing blade 122 can be used. Flat, vertical worn surfaces 114, 116 have countersunk holes 130 for threaded joints 132 (preferably socket-type hole bolts with heads), and the shear blade mount 100 in a removable state. The insertion body 110 of the shear blade can be attached inside. The counterbore hole 130 allows the head of the threaded joint 132 to fit within the counterbore. The threaded end of the threaded joint 132 is passed through a hole 130 with a counterbore and a hole 134 (FIG. 10) provided at the same position on the shear blade mount 100, on the outside of the jaw member 90 on the blade side. It is secured by nuts 136 (FIGS. 5 and 9) that fit into a counterbore 138.

As can be best seen in FIG. 10, there is also a guide blade mounting base 200 inside the jaw member 90 on the blade side, and this mounting base can be used to insert a guide blade insertion body 210 made of hardened steel. (It is best understood in Fig. 8). The embodiment of the guide blade insertion body 210 is best seen in FIG. The guide blade insert 210 has generally flat and vertical worn surfaces 214 and 216 and generally flat and horizontal worn surfaces 218 and 220. The straight portion where the vertical and horizontal wear surfaces intersect forms the cutting edge 222 of the four shear blades. The guide blade insertion body 210 includes parallel inclined end faces 224 and 226, which form a parallelogram shape. The inclined end faces 224 and 226 of the guide blade insertion body 210 are at an angle with the inclined end faces 124 and 126 of the shear blade insertion body 110, and the guide blade insertion body 210 is correctly positioned on the guide blade mounting base 200. When arranged in the correct orientation, one of the end faces 224 and 226 applies a load to one of the end faces 124 and 126 of the insertion body 110 of the shear blades arranged adjacent to each other (see FIG. 8). I understand best). As a matter of course, since the cutting edge of the shear blade wears during use, the guide blade insertion body 210 has a parallelepiped shape, so that it can be rotated and arranged in the guide blade mounting base 200. (The location is changed to the guide blade mounting base 300 on the guide side as described below.) All four shear blade cutting edges 222 can be used. The vertical wear surfaces 214 and 216 have female screw holes 230 drilled for screwing screw-type joints 232 (for example, bolts), and the guide blade insertion body 210 is detachably attached to the guide blade mounting base 200. Install inside. The threaded end of the threaded joint 232 is inserted into a countersunk hole 234 (FIGS. 5 and 9) provided at the same position on the outside of the blade side member 90, and the guide blade insert 210 It is screwed into the female screw hole 230 opened in.

As can be best seen in FIGS. 9 and 11, the member 92 on the guide side also has a guide blade mounting base 300 (FIG. 11), and this mounting base is attached to the guide blade mounting base 200 on the blade side. The structure is such that the same guide blade insertion body 210 that is inserted can be inserted, and the guide blade insertion body 210 is replaced between the guide blade mounting base 300 on the guide side and the guide blade mounting base 200 on the blade side. Make it possible. Therefore, in the case of the guide blade mounting base 200 on the blade side, a screw-type joint 232 (for example, a bolt) is provided at the same position on the outside of the jaw member 92 on the guide side, and a hole 334 with a counterbore (FIGS. 7 and 8). In substantially the same way as inserting into FIG. 10) and screwing into the hole 230 made in the guide blade insertion body 210, the guide blade insertion body 210 also uses the same screw type joint tool on the guide side. The guide blade mounting base 300 is held and fixed.

As can be best seen in FIGS. 9 and 11, the horizontal member 94 has a horizontal blade mounting base 400 (FIG. 11), and this mounting base is a horizontal blade insertion body 410 (FIG. 11) made of hardened steel. The structure is such that Fig. 9) can be inserted. An example of the horizontal blade insertion body 410 is shown in FIG. The lateral blade insert 410 comprises a generally flat front side worn surface 414, generally flat upper and lower worn surfaces 418, 420, generally flat end faces 424, 426, and a back surface 428. To do. The back surface 428 contains four female threaded holes 430 arranged radially at equal intervals. The back surface 428 also matches the shape of the protruding portion 432, and this portion is fixed in the recess 434 (FIG. 11) in the lateral blade mounting base 400. The straight portion where the vertical wear surface 414 on the front side intersects the wear surfaces 418 and 420 at the top and bottom and the end face forms the cutting edge 422 of the four cutting blades. The lateral blade inserts 410 are preferably square with four female screw holes 430 arranged radially at intervals, so that the lateral blade inserts are placed in the lateral blade mount 400. Since the 90 degree rotation can be performed four times, all four cutting blade cutting edges 422 can be used even if the cutting edge of the shearing blade is worn during use. The horizontal blade insertion body 410 is fixed in the horizontal blade mounting base 400 by a screw type joint 434 (for example, a bolt), and the screw type joint 434 is a hole 436 with a counterbore in the horizontal member 94. It is inserted in (FIGS. 5 and 7). The end of the screw type joint 434 is fitted into the female screw hole 430 provided at the same position on the back surface 428 of the horizontal blade insertion body 410.

The upper jaw 40 has a blade side and a guide side, and corresponds to a member 90 on the blade side and a member 92 on the guide side of the adjacent lower jaw 42. On the blade side of the upper jaw 40, there is a shear blade mounting base 500 (FIG. 6), which is the same shear blade insert 110 (FIG. 5) used in the shear blade mounting base 100 of the lower jaw 42. It has a structure that allows you to insert. This makes the shear blade insert 110 compatible with the maxilla and mandible, resulting in a reduction in the number of different blade shapes required for the shear attachment 10. However, in the upper jaw, the shear blade insert 110 is placed in the correct orientation at the upper tip, which is symmetrical to the lower tip in the lower jaw (compare FIG. 5 and 7). The insertion body 110 of the shear blade is fixed to the upper jaw in substantially the same manner as that of the lower jaw. The threaded end of the threaded joint 132 is inserted through a countersunk hole 130 into a co-located hole 534 in the upper shear blade mount 500. Further, the screw-shaped end is fixed by a nut 136 housed in a counterbore 538 (FIG. 7) on the guide side of the upper jaw 40.

With reference to FIGS. 6, 10 and 17, there is a nose tip attachment base 600 at the foremost tip of the upper jaw 40, that is, the nose tip portion 601 to insert a piercing tip insertion body 610 made of hardened steel. (Figs. 5, 7, and 17), which protects the base material of the tip of the nose of the upper jaw from wear during use. The nose tip mounting base 600 includes a blade side nose tip mounting base 602 (FIGS. 6 and 17), a guide side nose tip mounting base 604 (FIG. 10), and a front nose tip mounting base 606 (FIGS. 6 and 10, FIG. 17), and as a result, a narrowed portion 608 is formed at the tip of the nose. The foremost tip of the nose 609 on the nose mounting base 600 is preferably curved, which minimizes stress concentration on the nose portion 608 during both manufacturing and use. it can. The piercing tip insert 610 includes two semi-parts 620, 622, which are substantially symmetrical with each other except for holes for the joints in each (described later). The half part that covers the blade side of the nose is referred to as the blade side half part 620 below. The half-part that covers the guide side of the tip of the nose is hereinafter referred to as the guide-side half-part 622.

FIG. 15 shows various views of the embodiment of the blade-side half-part 620. FIG. 16 shows various views of the guide-side half-part 622 as in the embodiment. Each of the piercing tip semi-parts 620, 622 has an outer wall 630 with a substantially flat and vertical wear surface 632 and a substantially flat and vertical inner wear surface 634. The semi-parts 620, 622 also have a front wall 636 projecting laterally inward, which has an outer curved abraded surface 638 and an inward supporting surface 640. The piercing tip semi-parts 620, 622 also have a lower side portion 642 that projects laterally inward, including a lower flat wear surface 644 and an upward side support surface 646. The semi-parts 620 and 622 at the piercing tip also have an end support surface 648 and a ridge portion 650, and the ridge portion 650 has an upper ridge support surface 651 and a lower ridge support surface. There is 653. The ridge portion 650 can also have a curved outer edge to reduce stress concentration. The lower protruding support surface 653 extends behind the end support surface 648, the purpose of which will be described later in connection with FIGS. 22 and 23. The straight portion where the flat and vertical wear surface 632 and the lower flat wear surface 644 intersect forms the cutting edge 652 of the shear blade. The straight portion where the curved worn surface 638 on the front wall 636 and the flat worn surface 644 on the lower side intersect forms the cutting edge 654 of the front piercing tip. (The piercing tip on the front may be chamfered.)

As can be best seen in FIGS. 6, 10, and 17, the mounting bases 602, 604, and 606 at the tip of the nose are formed with a support surface 656 at the edge of the peripheral edge, and this surface 656 is a half of the piercing tip. It receives the outer edges of the parts 620, 622 in a complementary manner. As a matter of course, the width between the inward surface 640 of the front wall 636 protruding laterally inward from each of the piercing tip half parts 620 and 622 and the upward surface 646 of the lower side portion 642 protruding laterally inward. By making it about half of the narrowed nose tip portion 608, when the piercing tip half parts 620 and 622 are attached to the nose tip mounting base 600, the inward support of the side wall 630 on the piercing tip half parts 620 and 622 The surface 640 and the support surface 646 on the upper side of the lower side 642 are provided with respect to the support surfaces of the blade side nose tip mounting base 602, the guide side nose tip mounting base 604, and the front nose tip mounting base 606. Make contact. Further, the upper protruding support surface 651 and the lower protruding support surface 653 on the tip semi-parts 620 and 622 come into contact with the support surface 656 at the peripheral end of the mounting base 600 at the tip of the nose. On the blade side of the tip of the nose 601, one of the inclined end faces 124 and 126 (depending on the orientation) in the insertion body 110 of the upper shear blade is adjacent to the support surface 648 of the rear end in the half part 620 on the blade side. , Contact the support surface 648. Therefore, the blade-side half-part 620 of the piercing tip has the blade insertion body 110 and the upper protruding support surface 651 and the lower protrusion on the support surface 656 at the peripheral edge of the mounting base at the blade-side tip. The outward rotation (described later) is suppressed by both fitting the ridge support surface 653. The semi-part 622 at the tip of the piercing on the guide side is formed by fitting the upper protruding support surface 651 and the lower protruding support surface 653 into the support surface 656 at the peripheral edge of the mounting base 604 on the guide side. Movement is suppressed.

As a matter of course, when the half parts 620 and 622 on both sides of the piercing tip are attached to the nose tip mounting base 600, the narrowed nose tip portion 608 is completely surrounded by the piercing tip insertion body 610 made of hardened steel. , The base material of the nose tip 601 is protected from being worn during use.

Not only is the rotation regulated by the support surface 656 at the edge of the periphery, but also the half parts 620 and 622 on both sides of the piercing tip are fixed to the narrowed nose tip 608 using a screw type joint 670. As a preferred embodiment, the threaded joint is a perforated bolt with a socket head. The outer walls 632 of each of the half parts 620 and 622 on both sides have holes 660 that are aligned and penetrated. The narrowed nose tip portion 608 is also provided with a hole 664 aligned so as to pass through. A concentric counterbore 668 is provided above the hole 660 in the outer wall 632 of the half-part 620 on the blade side. The hole 660, which is aligned with the outer wall 632 of the semi-part 622 on the guide side, is provided with a female screw. The counterbore 668 allows the head of the threaded joint 670 to fit within the counterbore 668. The threaded end of the threaded joint 670 was inserted into the narrowed nose tip 608 through the hole 660 in the blade side half part 620 and aligned with the guide side tip half part 622. It is screwed into the female screw hole 660. Naturally, the counterbore 668 and the female screw hole 660 in the half parts 620 and 622 on both sides of the tip can be replaced if necessary. Alternatively, instead of drilling a hole 660 in one of the tip half-parts, the outer walls 632 of the half-parts 620, 622 on both sides are provided with counterbore 668 to accommodate the head of the threaded joint 670 and the other side. It is also possible to allow the nut (not shown) to be accepted on the half-part at the tip of the head. As will be described in more detail later in connection with FIGS. 18 and 22, the holes 660, 664 are arranged along an arc concentric with the front end of the piercing tip 610 (ie, the outer curved abraded surface 638) and are screwed. Ensure that the load on the fitting 670 is more uniform.

Naturally, when attached to the upper jaw 40, the flat and vertical wear surfaces 114, 116 (depending on the orientation) of the shear blade insert 110 are the vertical wear surfaces 632 on the blade-side tip half-part 620. The cutting edges 122 and 652 of the shearing blades of the insertion body 110 of the shearing blade and the insertion body 610 at the piercing tip are substantially aligned with each other. Similarly, on the lower jaw 42, the flat and vertical wear surfaces 114, 116 (depending on the orientation) of the shear blade insert 110 are with the vertical wear surface 214 on the blade side guide blade insert 210. They are substantially coplanar, and the cutting edges 122 and 222 of the respective shear blades are substantially aligned. This is also, of course, the vertically abraded surfaces 114, 116, 632 and the cutting edge of the shear blade provided on the upper shear blade insert and the piercing tip insert 610, which are substantially coplanar. 122 and 652 are slightly laterally displaced inward from the cutting edges 122 and 232 of the shear blades in the insertion body 110 of the shear blade of the lower jaw and the insertion body 210 of the guide blade on the blade side (about 0.01). The range between inches and 0.05 inches is preferred), when the upper jaw moves in the range of motion into the elongated groove 96 of the lower jaw 42, the cutting edge of the upper shear blade passes the cutting edge of the shear blade in the lower jaw. It has become like. Similarly, the cutting edge 652 of the shear blade on the guide-side half-part 622 at the piercing tip is laterally displaced inward from the shear blade cutting edge 222 on the guide-side guide blade insertion body 210 (about 0). The range between 0.01 inch and 0.05 inch is preferred). Therefore, the width of the insertion body 610 at the piercing tip is smaller than the distance between the cutting edge 222s of the shear blades on the guide blades 210 on the blade side and the guide side (between about 0.02 inch and 0.1 inch). The range is preferred.) When the upper jaw enters and closes into the elongated groove 96 of the lower jaw 42, the piercing tip insert 610 is allowed to pass between the lower guide blades 210 on both sides. It is also possible to insert padding between the various inserts 110, 210, 610 and the mounts 100, 200, 300, 500, 600 to maintain precise tolerances between the cutting edges of each shear blade.

18 to 22 are enlarged side views of both jaws 40 and 42, and when the upper jaw is moving, the blade inserts 110 and 210 and the piercing tip insert 610 and the horizontal blade are inserted. The relationship with the body 410 is shown more clearly. That is, it shows from a completely open position (FIG. 18) to a completely closed position (FIG. 21) reaching the entire depth of the elongated groove 96 of the lower jaw 42. FIG. 19 illustrates a state in which the upper jaw is half closed, and the cutting edge 654 of the front piercing tip of the insertion body 610 of the piercing tip is perpendicular to or perpendicular to the ground. FIG. 20 shows that the upper jaw is in a position where the cutting edge 654 of the piercing tip on the front surface crosses the lower jaw 42.

An anti-wear 700 on the tip of the nose is fixed (by welding or the like) above the insertion body 610 at the tip of the piercing on the tip of the nose 601 of the upper jaw 40 to protect the base material of the upper jaw from abrasion during use. When the wear stopper 700 on the tip of the nose is worn out, it can be removed and replaced with another wear stopper 700 on the tip of the nose. The anti-wear 700 can be manufactured from the same material as the base material, or can be manufactured from hardened steel. With reference to FIG. 20, the wear-prevention of the tip of the nose is preferably long enough along the tip of the nose to ensure that the base material of the tip of the nose is protected until the upper jaw 40 enters at least the inner part of the lower jaw 42. As another embodiment, it is also possible to extend the piercing tip insert 610 along the nose tip portion 601 to the full length of the depth at which the upper jaw enters the mandible. In such an embodiment, the nose tip mount 600 would be extended as well, requiring an additional hole 660 to properly press the elongated piercing tip insert 610 against the narrowed nose tip portion 608. Sometimes.

As a matter of course, the base material of the nose tip portion 601 above the piercing tip insertion body 610 is more easily worn than the piercing tip insertion body 610 made of hardened steel. Therefore, without the anti-wear 700, the nose tip portion 601 may be worn down to the position where the upper edge of the insertion body 610 at the piercing tip protrudes from the nose tip portion. If the upper edge of the piercing tip insert 610 protrudes outward from the tip of the nose 601 the protrusion may get caught in the material in the jaw when the upper jaw reopens, that is, when the upper jaw is pulled out of the lower jaw. .. When sufficient pulling force is applied to the upper jaw, the insert at the tip of the piercing is pulled away from the tip of the nose by the material that is caught, and in the process, the screw-type joint is sheared or the insert at the tip of the piercing is broken. there's a possibility that. Therefore, as described below, in the nose tip portion 601 of the upper jaw, when the wear stopper 700 is not attached to the nose tip portion 601 or the wear stopper itself is worn out, the base material of the nose tip portion can no longer be protected by the wear stopper. It is designed to minimize the risk of getting caught, even in some cases.

18 and 21 show the preferred structure of the nose tip portion 601 designed to prevent or minimize snagging. The virtual line shown by reference number 800 refers to the arc drawn by the frontmost of the front piercing tip 654 on the front piercing tip insert 610 as the maxilla moves over the entire range of motion. There is. The arc 800 is an arc having a radius R1 with respect to the central axis of the jaw turning shaft 60. The most of the nose tip portion 601 from the cutting edge 654 of the front piercing tip at the piercing tip 610 to the end of the wear stopper 700 of the nose tip portion, or from the cutting edge to the position of the nose tip corresponding to the maximum depth at which the nose tip portion 601 penetrates. The outer surface is configured to have a substantially smooth arc 802 at the tip of the nose, away from the arc 800 at the cutting edge of the front piercing tip. The arc 802 of the tip of the nose is an arc of radius R2 smaller than the radius R1, and is the distance in the radial direction from the central axis of the turning axis 60 of the jaw to the position along the tip of the nose 601 that is, from the central axis to the arc 802 of the tip of the nose. Is gradually smaller than the arc 800 of the cutting edge of the piercing tip on the front surface. In other words, as it progresses from the cutting edge 654 on the front of the piercing tip along the nose tip 601 or along the arc 802 from the cutting edge 654 to the nose tip, the arc 800 and the nose tip on the front piercing tip The distance from the arc 802 to the arc 802 gradually increases. With this structure, the nose tip portion 601 can be brought into contact with the cutting edge 654 in front of the piercing tip, and the nose tip 601 can be prevented or suppressed from rubbing against the object pierced by the piercing tip 610. Wear can be suppressed as much as possible. Further, since the tip of the nose is gradually separated from the arc 800 of the cutting edge of the tip of the nose, the base material of the tip of the nose is worn away, and the upper edge of the insertion body 610 of the tip of the piercing is outward from the worn base material of the tip of the nose. Even if it reaches the point where it protrudes, the possibility of the cutting material getting caught in the jaw is reduced.

In addition, the piercing tip mounting base 600 and the piercing tip insert 610 pierce the tip when the protruding end of the piercing tip is caught or when the upper jaw is clogged with a cutting material caught in the jaw. It is made to surely hold. For example, the shaded area 900 in FIG. 22 is intended to represent a cutting material that is pinched or pierced between the worn surface of the insertion body 610 at the tip of the insertion and the insertion body 210 of the guide blade. However, if this is present, the upper jaw is clogged in the narrow groove 96 of the lower jaw 42, and the upper jaw 40 cannot be pulled out or reopened. The pulling force F (force exerted by the hydraulic actuator 30 pulling the upper jaw) of the upper jaw 40 is perpendicular to the straight line 806 in the radial direction drawn from the central axis of the swivel shaft 60 of the jaw to the midpoint of the cutting material 900 captured. It pierces in the direction of and tries to pull the insertion body 610 at the tip. Therefore, as a matter of course, the pulling force F can be suppressed on any supporting surface smaller than 90 ° with respect to the straight line 806. Therefore, the protruding portion 650 protruding rearward from the insertion body 610 at the piercing tip ensures that the support surface provides the pulling force F.

Referring to FIG. 22, since the angle formed by the lower protruding support surface 653 with the radial straight line 806 is smaller than 90 °, the support surface 656 at the peripheral end of the mounting base 600 at the tip of the nose has a pulling force F. Engage so as to suppress. Similarly, the inwardly facing support surface 640 of the front wall 636 applies a load to the mounting base 606 at the tip of the nose as indicated by the arrow R and withstands the pulling force F. Therefore, the pulling force F reduces the shearing force that the resistance force or reaction force R acts on the joint 670, so that the insertion body 610 at the piercing tip is pulled out from the tip of the nose or cracks even if it is not. This can be prevented or minimized.

Further, since the hole 660 in the insertion body 610 at the piercing tip has a radius R3 smaller than the radius R2 and is aligned along the arc 804 concentric with the arc 802 at the tip of the nose, a more uniform load is applied over all the joints 670. Is added, thus further reducing the shear stress acting on any one of the joints, or causing a stress concentration that can cut or pierce the joints and crush the insert at the tip.

FIG. 23 shows another example, in which the shaded area 902 is intended to represent the cutting material sandwiched between the piercing tip insert 610 and the lateral blade insert 410. .. In this example as well, the pulling force F is still applied to the radial straight line 806 extending from the central axis of the jaw swivel axis 60 to the central point of the material (in this example, it is assumed to be at the cutting edge 654 of the front piercing tip). Stick in the vertical direction and pull the tip. When the pulling force F is received, the insertion body 610 at the piercing tip is likely to rotate outward or come off from the tip of the nose 601 as shown by the arrow 810. However, as shown by the reaction force R, the upper protruding support surface 651 meshes with the support surface 656 at the peripheral end of the mounting base 600 at the tip of the nose, and the insertion body 610 at the piercing tip moves outward. The shearing force applied to the joint 670 can be reduced to prevent or reduce the insertion body 610 at the piercing tip from being crushed by stress.

In FIG. 24, it is unlikely that the tip of the nose 601 is worn down to form a protruding portion where the material is caught as described above, and the pulling force F pierces the upper edge of the insertion body 610 at the tip. An example of how it works is shown. Considering that the structure is such that the distance between the arc 802 of the nose tip and the arc 800 of the cutting edge of the front piercing tip gradually increases for the reason explained above, such a thing is likely to occur. Nor. However, in spite of this, when the tip of the nose is worn away and a protruding part is formed in which the material is caught, the upper peripheral edge of the ridge support surface 651 on the mounting base 600 of the tip of the nose is indicated by the reaction force R. In order to withstand the pulling force F that tries to move the cutting edge of the piercing tip outward as shown by the arrow 810 by engaging with the support surface 656 at the end of the joint, the shearing force applied to the joint 670 is reduced and the difference between the piercing tips. It is possible to prevent or reduce the inclusion body 610 from being crushed by stress.

The above description is presented to enable those skilled in the art to manufacture and utilize the present invention, and is provided in the patent application documents and the content of the requirements thereof. The various improvements of the embodiments described herein and the general principles and features of the embodiments described herein will be readily apparent to those skilled in the art. Therefore, the present invention is not limited to the examples described here and the examples shown in the drawings, but is equal to the widest range that does not contradict the gist and scope of the separately attached claims.

Claims (10)

A piercing tip insert for a dismantling shearing machine , the dismantling shearing machine having an upper jaw with a blade side and a guide side .
The maxilla is swivel with respect to the mandible within the range of motion between the open and closed positions and has the most anterior tip that forms the tip of the nose, which is the blade located on the blade side of the maxilla. It has a side, a guide side located on the guide side of the upper jaw, a bottom side, and an anterior side.
The insertion body at the piercing tip includes a side wall surface of the outer flat surface on the blade side, a side wall surface of the outer flat surface on the guide side, a bottom surface, and a curved outer front wall surface.
The bottom surface extends in the lateral direction between the bottom side of the side wall surface of the outer plane on the blade side and the bottom side of the side wall surface of the outer plane on the guide side, and the bottom surface and the side wall surface of the outer plane on the blade side are formed. The cutting edge of the shear blade is formed at the intersection,
The curved outer front wall surface extends laterally between the front side of the side wall surface of the outer plane on the blade side and the front side of the side wall surface of the outer plane on the guide side, and has an arc radius of the front wall. The cutting edge of the front piercing tip is formed at the intersection of the curved outer front wall surface and the bottom surface.
As a result, when the insert of the piercing tip is attached to the tip of the nose of the upper jaw, the tip of the nose is along the blade side of the tip of the nose near the side wall surface of the outer plane on the blade side and on the side of the outer plane on the guide side. A piercing tip insert along the guide side of the nose tip near the wall surface, along the bottom side of the nose tip near the bottom surface, and along the front side of the nose tip near the curved outer front wall surface. A plug that is completely enclosed and protected by . The piercing tip plug according to claim 1 , wherein the piercing tip plug is composed of two parts including a first piercing tip portion and a second piercing tip portion. Insert body to do . The insertion body of the piercing tip according to claim 2, wherein the first piercing tip portion and the second piercing tip portion are made up of a pair of piercing tip half parts. Insert body to be . The insertion body at the piercing tip according to any one of claims 1 to 3, wherein each of the side wall surface of the outer plane on the blade side and the side wall surface of the outer plane on the guide side has a plurality of holes for a joint. There are multiple holes for the joint, each of which is structured to accommodate a screw-type joint for attaching the piercing tip insert to the tip of the nose, and multiple holes for the joint. At least some of them are arranged along an arc concentric with the arc on the front wall, and the radius of the arc that arranges the holes for the joint is smaller than the radius of the arc on the front wall . A plug that features. A piercing tip plug body according to any one of claims 1-4, maxillary, when turning the movable region the tip piercing attached to the upper jaw, before how the piercing tip of the tip front wall arc radius piercing an arc half the diameter of the tip larger than, characterized in that it is gradually separated from the arc radius as the profile of the cutting edge of the tip piercing the curved outer front wall Sakomitai. The piercing tip insert according to any one of claims 1 to 5 .
The upper jaw has an anti-wear on the tip of the nose, and the anti-wear on the tip of the nose has substantially the same arc radius as the arc radius of the front wall, and the anti-wear on the tip of the nose pierces the arc drawn by the cutting edge of the tip. A plug that is characterized by being gradually separated from . The piercing tip insert according to any one of claims 1 to 6, which is combined with an upper shear blade, and is configured such that the upper shear blade is attached to the upper jaw on the blade side. An inserter characterized in that the front edge portion of the blade is adjacent to the trailing edge portion of the side wall surface of the outer plane on the blade side of the inserter at the piercing tip. Be a combination of the plug body and the upper shearing blade tip piercing according to claim 7, in combination, characterized in that it further comprises a configured lower shearing blades to be attached to the blade side of the lower jaw .. It is a combination of the insertion body at the piercing tip according to any one of claims 7 or 8 and the upper shear blade, and further includes a guide blade configured to be attached to the guide side of the lower jaw. Combination to do . A horizontal blade that is a combination of the insertion body at the piercing tip according to claim 9 and the upper shear blade and is configured to be laterally attached between the lower shear blade and the guide blade. A combination characterized by including.

Images