JP2017104824A - Crusher - Google Patents

Abstract

PURPOSE: To use a crusher by mainly purposing the splitting of concrete masses after a structure (building or the like) such as one made of a reinforcing bar concrete is dismantled, and particularly, to enable the most efficient crushing to splitting work while the reinforcement of a tip claw part is being intensified to minimize the abrasion of the tip claw part so that the tip claw part may endure a long-period use.CONSTITUTION: A crusher comprises a fixed jaw 2 provided at the lower end a crusher outer casing 1 and a movable jaw 3 provided on the fixed jaw 2 to freely open and close, so that a tip end claw part 4 of high hardness and high toughness in a massive form projecting ahead at a tip point of the fixed jaw 2 forms a flat triangle sharp at the tip as viewed from a lateral face. The front end of the fixed jaw 2 and the rear end of the tip claw part 4 are fixed. The crusher is provided with an upper side reinforcing plate 5 of high hardness that covers the top face of the tip end claw part 4 and is formed so that the front end of the upper side reinforcing plate 5 may slightly protrude from the tip end of the tip end claw part 4.SELECTED DRAWING: Figure 1

Description

  The present invention is mainly used to break up a concrete block after dismantling a structure (such as a building) made of reinforced concrete. The present invention relates to a crusher capable of performing the most efficient crushing or splitting work that minimizes the wear of the claw portion and can withstand the long-term use of the tip claw portion.

  In recent years, the wall of concrete structures (buildings, etc.) made of reinforced concrete and pillars are generally cut into fixed parts with a dismantling machine (crusher) called a large split machine, and then about 30 cm to width Divide into approximately 60cm and then baton-touch to the crusher. The split machine further divides the divided concrete lump into smaller pieces and pulverizes them to about 10 cm x about 20 cm to collect the internal reinforcing bars and at the same time facilitate recycling.

  The concrete block pulverized by the splitting machine is transported to a recycling factory and is pulverized again by the splitting machine. The purpose is to increase the efficiency of the recycled concrete glass manufacturing crusher at the same time as completely recovering the unrecovered steel bars.

  Here, a small machine with the same structure is used at the dismantling site and the recycling plant. At the demolition site, it is an operation to divide the material that has been divided into an appropriate size with a large crusher, and the target concrete block is almost on the ground surface, and it is sandwiched with a crevice machine and crushed from above.

  However, in the recycling factory, the concrete blocks carried by the dump truck are brought in one after another, so as shown in FIGS. 5 (A) and 5 (B), work is done in a large mountain shape. The fixed jaw will stab into a mountain-shaped concrete block, and it will be crushed while looking for the object to be crushed while pulling forward.

  In the work in the recycling factory as shown in FIGS. 5 (A) and 5 (B), if the dismantling machine or splitting machine as an attachment is repeatedly pierced and crushed into a mountain-shaped concrete lump, for example, Shore Hard Even the tip claw portion having a high wear resistance of about 55 HS or more may wear about 1 cm to about 3 cm per month, depending on the work frequency.

  If the work is compared in this way, the fixed jaw tip of the splitting machine used in the recycling factory has a piercing and pulling compared to that at the dismantling site, and a longer one is desired. As can be seen from this, if the length of the claw tip of the fixed jaw can be changed by various operations (need to be considered different depending on the object at the dismantling site and the size of the open space, etc.) High efficiency is obtained.

  Also, a tip claw structure that improves the wear resistance of the tip claw is disclosed in Citation 1. According to this, in order to improve the wear resistance of the crushing claw, by using SKD61 as a material having high hardness and toughness from among hot die tool steel, the SKD61 is welded to the tip of the crushing claw. It is an invention to be solved by forming a toe portion by SKD61.

  By the way, as shown in the prior art of FIGS. 6A to 6E, the fixed jaw b and the tip claw a provided at the lower end of the crusher outer casing are fixed by welding. In this welding, the valley of FIG. 6 (A) is piled up, this is repeated several times, and what is shown in FIGS. 6 (B), (C), (D) and (E). There is a need for work that is welded and fixed again.

  There is a more important point in the strength of welding. That is, there is a rise in the temperature of the hard metal of the fixed jaw b and the tip claw a during welding. Since the hard metal is tempered due to this temperature rise, there is a serious disadvantage that the strength is reduced. Therefore, the welding is not performed in a short time, but in FIGS. 6 (A) to (E). As shown, there is a disadvantage that the welding work is slowly performed and the work efficiency is halved.

  In many of the crushing machines, which are the above-mentioned splitting machines, a fixed jaw and a movable jaw are provided so as to be openable and closable by a hydraulic cylinder mechanism or the like. A structure that crushes and cuts a concrete structure or a steel concrete structure member by acting effectively in the work is generally used.

Japanese Patent Laying-Open No. 2015-59340

  Incidentally, as described above, even the tip claw portion with a high wear resistance having a Shore hardness of about 55 HS or more cannot be avoided depending on the frequency of use. For this reason, the problem (technical problem or purpose) to be solved by the present invention is preferably configured to protect the tip claw part, and an improvement / improvement that can be easily restored after wear is required. And achieving a good reinforcing structure for the tip claw.

  Therefore, as a result of intensive researches to solve the above problems, the inventor has provided the invention of claim 1 with a fixed jaw provided at the lower end of the crusher outer casing, and openable on the fixed jaw. The fixed jaw part is a lump-shaped, high-hardness and high-toughness tip claw part that is pointed forward and has a flat triangular shape when viewed from the side. The front end of the jaw and the rear end of the tip claw are fixed, and a high-hardness and high-toughness upper reinforcing plate that covers the upper surface of the tip claw is provided, and the front end of the upper reinforcing plate is the tip claw The above-mentioned problem has been solved by using a crusher characterized in that it is formed so as to protrude slightly from the tip.

  According to a second aspect of the present invention, in the crusher of the first aspect, the lateral width of the upper reinforcing plate is formed to be equal to the lateral width of the tip claw portion, and the lateral width portion of the upper reinforcing plate and the upper portion of the tip claw portion Is fixed by welding, and the lower surface of the upper reinforcing plate and the tip of the tip claw are fixed by build-up welding. did.

  According to a third aspect of the present invention, in the crusher according to the first or second aspect, a lower reinforcing swash plate is provided which contacts the lower side surface of the tip side of the upper reinforcing plate and covers the lower surface of the tip claw portion. The above-mentioned problem has been solved by using a crusher characterized in that the tip of the side reinforcing swash plate and the lower surface of the upper reinforcing plate are fixed by overlay welding.

  According to a fourth aspect of the present invention, in the crusher according to the third aspect, a lateral width of the lower reinforcing swash plate is formed to be equal to a lateral width of the tip claw portion, and a lateral width portion of the lower reinforcing swash plate and the tip claw The above problem has been solved by using a crusher characterized in that the lower surface of the part is fixed by welding. Further, in the invention according to claim 5, in the crusher according to any one of claims 1, 2, 3 or 4, the tip claw portion has a predetermined interval between the main tip claw portion and both sides of the main tip claw portion. The above-mentioned problem is solved by using a crusher characterized by comprising a sub-tip claw portion.

  In the first aspect of the present invention, the wear resistance of the tip claw portion can be further improved by the presence of the upper reinforcing plate. In particular, the tip portion of the upper reinforcing plate is worn, and the tip portion of the upper reinforcing plate is worn just before the tip claw portion is worn while the tip portion of the upper reinforcing plate is worn according to the frequency of use. By replacing only the part with a new member, there is the greatest advantage that the life of the tip claw part can be further increased. In particular, the force is applied to the upper reinforcing plate portion, and the splitting or crushing operation can be sufficiently strengthened only by attaching by a little welding.

  According to the second aspect of the present invention, the splitting or crushing operation can be sufficiently performed only by welding with the lateral width portion of the reinforcing plate while maintaining such a size. In the invention of claim 3, since the lower reinforcing swash plate is also attached in addition to the upper reinforcing plate, the effect of being able to perform a sufficient crushing operation even if performing the splitting or crushing operation quite frequently. Play.

  In the invention of claim 4, the same effect as that of the invention of claim 2 can be exhibited. In the invention of claim 5, the tip claw portion is composed of a main tip claw portion and a sub tip claw portion having a predetermined interval on both sides of the main tip claw portion, so that the piercing operation is extremely effective. In addition, effects such as smoothness can be exhibited.

(A) is a side view of the present invention, and (B) is an enlarged side view of the main part of (A). (A) is a perspective view of the tip claw portion at the tip of the fixed jaw of the present invention, and (B), (C), and (D) are enlarged end views as viewed from arrows Y1-Y1 in (A). . (A) is a side view of the tip claw portion of the first embodiment, and (B), (C) and (D) are side views of the tip claw portion of the second embodiment having different plate thicknesses. (A) is a side view of the state where the tip nail portion is worn after crushing work, (B) is a side view of the tip nail portion excised by gouging or the like, and (C) is a repair upper side repaired at the excised location. Side view of the tip claw portion with the reinforcement plate added, (D) is an end view taken along arrow Y2-Y2 of (C), and (E) is an end view completed by welding the repair upper reinforcement plate to the tip claw portion. is there. (A) is the state figure which is performing the cleaving operation | work with the crusher of this invention via a hydraulic shovel, (B) is the principal part enlarged view of (A). (A), (B), (C), (D), and (E) are principal part sectional drawings which show the order which has fixed the front-end | tip nail | claw part by build-up welding in a prior art.

  Hereinafter, the embodiment of the present invention will be described with reference to the drawings. The crusher is mainly composed of a crusher outer casing 1, a fixed jaw 2 and a movable jaw 3 as shown in FIGS. First, a fixed jaw 2 is integrally formed with the crusher outer casing 1, and the movable jaw 3 performs an opening / closing operation on the fixed jaw 2. The movable jaw 3 is pivotally supported 31 by the base (root) of the crusher outer casing 1.

  Here, the sides facing each other in the opening and closing direction of the fixed jaw 2 and the movable jaw 3 are referred to as a fixed jaw working surface portion 21 and a movable jaw working surface portion 31. The longitudinal direction of the fixed jaw 2 and the movable jaw 3 is a direction protruding outward from the crusher outer casing 1 and the width direction is a direction orthogonal to the longitudinal direction.

  The fixed jaw 2 has a box shape and is hollow inside. At the distal end of the fixed jaw portion 2, a lump-shaped, high-hardness and high-toughness distal claw portion 4 protruding forward is sharp when viewed from the side and has a flat triangular shape, and the front surface of the fixed jaw portion 2 And the rear surface of the tip claw portion 4 are fixed by welding or bolts / nuts.

  A high-hardness and high-toughness upper reinforcing plate 5 that covers the upper surface of the tip claw portion 4 is provided and is formed so as to protrude slightly from the tip of the tip claw portion 4. The width of the upper reinforcing plate 5 is formed to be equal to the width of the tip claw portion 4, and the lateral width portion of the upper reinforcing plate 5 and the upper portion of the tip claw portion 4 are fixed by welding 9.

  Further, the lower surface of the tip of the upper reinforcing plate 5 and the tip of the tip claw portion 4 are fixed by build-up welding 9a. The width of the upper reinforcing plate 5 is formed to be equal to the width of the tip claw portion 4, and the lateral width portion of the upper reinforcing plate 5 and the top surface of the tip claw portion 4 are fixed by welding 9.

  2B is equivalent to the case where the width of the upper reinforcing plate 5 is slightly smaller than the width of the tip claw portion 4 (about 5 mm), as shown in FIG. As shown in FIG. 2, the width of the upper reinforcing plate 5 is the same as the width of the tip claw portion 4 or, as shown in FIG. The case where the width is slightly larger (about 5 mm) is included.

  In particular, a lower reinforcing swash plate 6 that contacts the lower side surface of the upper reinforcing plate 5 and covers the lower surface of the distal claw portion 4 is provided, and the tip of the lower reinforcing swash plate 6 and the upper reinforcing plate are provided. The lower surface of the plate 5 is fixed by overlay welding 9a. The width of the lower reinforcing swash plate 6 is formed to be equal to the width of the tip claw portion 4, and the lateral width portion of the lower reinforcing swash plate 6 and the lower surface of the tip claw portion 4 are fixed by welding 9. ing.

  As shown in FIGS. 1 and 2, the movable jaw 3 is moved by a cylinder 7 mounted in the crusher outer casing 1. As shown in FIG. 1A, the cylinder 7 has a cylinder body 7a provided in the crusher outer casing 1 so as to be rotatable on the vertical surface of the crusher outer casing 1, and the tip of the piston rod 7b. Is pivotally supported 32 on the tip side of the movable jaw 3.

  When the movable jaw 3 is opened and closed on the fixed jaw 2 and the movable crushing blade 8a crushes a concrete lump or the like, the through-hole-like portion 2a in which the movable crushing blade 8a is accommodated when closed. Is formed. It is comprised so that a crushed material may fall without clogging from this through-hole-shaped part 2a.

  In particular, a triangular tooth-like portion 3a is provided on the lower surface of the movable jaw portion 3 from the distal end side to the base side so as to form a plurality of rows (two rows or three rows), and the fixed portion is fixed thereto. On the jaw part 2, a shore part 2c with a knob 2b is provided so as to surround the tooth part 3a. This is configured to make the concrete lump work more efficiently.

  A distal claw portion 4 is provided at the distal end of the fixed jaw portion 2. The distal claw portion 4 has a predetermined interval S between the main distal claw portion 4A and both sides of the main distal claw portion 4A. The auxiliary tip claw portions 4B and 4B are configured. Furthermore, even if the said front-end | tip nail | claw part 4 is one, the thing of the equivalent magnitude | size may be comprised by two pieces or three or four pieces.

  Inserted into the predetermined interval L are downward claws 3b, 3b provided at the tip of the movable jaw 3, and the object to be crushed is brought into engagement with the downward claws 3b, 3b and the predetermined interval L. It is to be crushed.

  A movable crushing blade 8a is attached to the movable jaw 3 as shown in FIGS. The movable side crushing blade 8a has a shape in which the abacus bead is substantially halved, and the cutting edge gradually becomes thinner toward the tip. And the movable side crushing blade 8a has a streamline shape in which the cross-sectional shape along the front-rear direction has a maximum thickness near the rear side.

  As shown in FIGS. 1 and 2, the fixed jaw working surface of the fixed jaw 2 is provided with a fixed jaw side cut body 8 d along the longitudinal direction, and the movable jaw working surface of the movable jaw main body 3. Are provided with a movable jaw side cut body 8e along the longitudinal direction, and when the movable jaw portion 3 opens and closes on the fixed jaw portion 2, the fixed jaw side cut body 8d and the movable jaw side cut body 8e together with these. Moves in a bowl shape and cuts the workpiece by shearing (see FIG. 1A).

  As shown in FIG. 3, as the length L and the thickness t of the upper reinforcing plate 5 as the first embodiment, those having an appropriate length L and thickness t are selected. Moreover, the reinforcement length changes suitably with the length L and board thickness t of the said lower side reinforcement swash plate 6 as 2nd Embodiment.

  For example, as shown in FIG. 4B, when the lower reinforcing swash plate 6 has a thin plate thickness t1, the upper reinforcing plate 5 has a length L1, but as shown in FIG. 4C. When the lower reinforcing swash plate 6 has a slightly thicker thickness t2, the upper reinforcing plate 5 has a length L2. Further, as shown in FIG. 4C, when the lower reinforcing swash plate 6 has a thick plate thickness t3, the upper reinforcing plate 5 has a length L3. Thus, it is an invention which can choose intensity etc. beforehand according to the frequency of use.

  In the work at the recycling factory as shown in FIG. 5, the product (the dismantling machine or splitting machine as an attachment) provided at the tip of the boom 90 and the arm 91 of the excavator is pierced and crushed into a mountain-shaped concrete block. When the operation is repeated, the tip of the upper reinforcing plate 5 on the upper side of the tip claw 4 is gradually worn as shown in FIG.

  Here, it cuts out by gouging etc., mounts the repair upper reinforcement board 5a here (refer FIG. 4 (A)), the rear end of this repair upper reinforcement board 5a, and the remaining said upper reinforcement board 5 cut out. The front end portion of the repair upper reinforcing plate 5a and the upper surface of the front end claw portion 4 are welded 9a to form a new end claw portion 4 as a new end claw portion 4 Can be provided.

  Further, in FIG. 4A, only the tip portion of the upper reinforcing plate 5 is worn, and in this case, the repair with the repair upper reinforcing plate 5a has been described after appropriate excision. Although not shown, the tip of the lower reinforcing swash plate 6 may be worn. In this case, as in the case of the upper reinforcing plate 5, the tip portion of the lower reinforcing swash plate 6 is appropriately cut off by gouging or the like, and the repaired lower reinforcing swash plate is connected to the welded 9 and By performing the build-up welding 9a, it can be provided as a new tip claw portion 4.

  The great advantage is not to repair the wear of the tip claw 4 with high wear resistance having a shore hardness of about 55 HS or more, but to repair the upper upper reinforcing plate 5 while maintaining the reinforcing effect. It is very easy to repair. This is because the splitting work in the present invention mainly repeats the piercing and crushing work on the mountain-shaped concrete block, and the force is applied to the tip, top and bottom surfaces of the tip claw part 4. This is because the structure can withstand the strength sufficiently only by welding 9 (fillet weld) the lateral width portion of the upper reinforcing plate 5 to the tip claw portion 4.

  To further explain this advantage, the present invention is different from the conventional welding operation shown in FIG. That is, in FIG. 6, it is difficult to connect the fixed jaw part b and the tip claw part a and perform the welding work from the upper and lower sides in particular so that the temperature does not rise (prevent tempering). However, in the present invention, unlike the conventional welding operation of FIG. 6, as shown in FIG. 4 (C), only the lateral width portion of the upper reinforcing plate 5 is welded 9 (fillet weld), which is highly sophisticated. It does not require welding technology and can be easily repaired at this work site.

DESCRIPTION OF SYMBOLS 1 ... Crusher outer cage, 2 ... Fixed jaw part, 3 ... Movable jaw part, 4 ... Tip nail | claw part, 5 ... Upper reinforcement board,
6 ... lower reinforcing swash plate, 9 ... welding, 9a ... overlay welding.

Therefore, as a result of intensive researches to solve the above problems, the inventor has provided the invention of claim 1 with a fixed jaw provided at the lower end of the crusher outer casing, and openable on the fixed jaw. A movable jaw part, and a tip claw part having a high hardness and toughness protruding forward at the tip part of the fixed jaw part has a sharp tip and a flat triangular shape when viewed from the side, The front end of the fixed jaw and the rear end of the tip claw are fixed, and an upper reinforcing plate having high hardness and high toughness that covers the upper surface of the tip claw is provided, and the front end of the upper reinforcing plate is the tip The above-mentioned problem has been solved by using a crusher characterized by being formed so as to protrude slightly from the tip of the claw portion.

According to a second aspect of the present invention, in the crusher of the first aspect, the lateral width of the upper reinforcing plate is formed to be equal to the lateral width of the tip claw portion, and the width end portion of the upper reinforcing plate and the tip claw portion The upper part is fixed by welding, and the crusher is characterized in that the lower end of the upper reinforcing plate and the front end of the claw part are fixed by build-up welding, Solved the problem.

The invention of claim 3, in claim 1 or 2 of the crusher, under the tip claw portion and not covering a lower surface of the upper reinforcing plate and the equivalent material abuts against the lower surface of the distal end side of the upper reinforcing plate The crushing machine is characterized in that a side reinforcing swash plate is provided and a tip of the lower reinforcing swash plate and a lower surface of the upper reinforcing plate are fixed by build-up welding. did.

According to a fourth aspect of the present invention, in the crusher of the third aspect, the lateral width of the lower reinforcing swash plate is formed to be equal to the lateral width of the tip claw portion, and the portion of the lateral width end of the lower reinforcing swash plate and the The said subject was solved by setting it as the crusher characterized by fixing the lower surface of a front-end | tip nail | claw part by welding.

According to the second aspect of the present invention, the cutting or crushing operation can be sufficiently performed only by welding to the portion of the lateral width end of the reinforcing plate while having such a size. In the invention of claim 3, since the lower reinforcing swash plate is also attached in addition to the upper reinforcing plate, the effect of being able to perform a sufficient crushing operation even if performing the splitting or crushing operation quite frequently. Play.

A high-hardness and high-toughness upper reinforcing plate 5 that covers the upper surface of the tip claw portion 4 is provided and is formed so as to protrude slightly from the tip of the tip claw portion 4. The width of the upper reinforcing plate 5 is formed to be equal to the width of the tip claw portion 4, and the lateral width end portion of the upper reinforcing plate 5 and the upper portion of the tip claw portion 4 are fixed by welding 9. .

Further, the lower surface of the tip of the upper reinforcing plate 5 and the tip of the tip claw portion 4 are fixed by build-up welding 9a. The width of the upper reinforcing plate 5 is formed to be equal to the width of the tip claw portion 4, and the lateral width end portion of the upper reinforcing plate 5 and the upper surface of the tip claw portion 4 are fixed by welding 9. .

In particular, a lower reinforcing swash plate 6 that contacts the lower side surface of the upper reinforcing plate 5 and covers the lower surface of the distal claw portion 4 is provided, and the tip of the lower reinforcing swash plate 6 and the upper reinforcing plate are provided. The lower surface of the plate 5 is fixed by overlay welding 9a. The width of the lower reinforcing swash plate 6 is formed to be equal to the width of the tip claw portion 4, and the lateral width end portion of the lower reinforcing swash plate 6 and the lower surface of the tip claw portion 4 are welded 9. It is fixed.

The great advantage is not to repair the wear of the tip claw 4 with high wear resistance having a shore hardness of about 55 HS or more, but to repair the upper upper reinforcing plate 5 while maintaining the reinforcing effect. It is very easy to repair. This is because the splitting work in the present invention mainly repeats the piercing and crushing work on the mountain-shaped concrete block, and the force is applied to the tip, top and bottom surfaces of the tip claw part 4. This is because the structure can sufficiently withstand the strength only by welding 9 (fillet weld) the lateral width end portion of the upper reinforcing plate 5 to the tip claw portion 4.

To further explain this advantage, the present invention is different from the conventional welding operation shown in FIG. That is, in FIG. 6, it is difficult to connect the fixed jaw part b and the tip claw part a and perform the welding work from the upper and lower sides in particular so that the temperature does not rise (prevent tempering). and although, in the present invention, unlike the conventional welding process in FIG. 6, as shown in FIG. 4 (C) and (E), to weld the part of the width ends of the upper reinforcing plate 5 9 (fillet weld) This is a structure that does not require advanced welding technology and can be easily repaired at this work site.

  Therefore, as a result of intensive researches to solve the above problems, the inventor has provided the invention of claim 1 with a fixed jaw provided at the lower end of the crusher outer casing, and openable on the fixed jaw. A movable jaw part, and a tip claw part having a high hardness and toughness protruding forward at the tip part of the fixed jaw part has a sharp tip and a flat triangular shape when viewed from the side, The front end of the fixed jaw and the rear end of the tip claw are fixed, and a flat upper reinforcing plate having high hardness and toughness covering the upper surface of the tip claw is provided and the flat upper reinforcing The front end of the plate is formed longer than the tip of the tip claw portion, and the lateral width of the flat upper reinforcing plate is formed to be equal to the lateral width of the tip claw portion. A crusher characterized in that the top of the tip claw is fixed by overlay welding By the, it is obtained by solving the above problems.

  According to a second aspect of the present invention, in the crusher of the first aspect, a flat plate-like lower reinforcing swash plate that contacts the lower side surface of the tip side of the flat plate-like upper reinforcing plate and covers the lower surface of the tip claw portion. The flat lower reinforcing swash plate has a lateral width equal to the lateral width of the tip claw portion, and the flat upper end of the lower reinforcing swash plate and the flat upper end of the upper reinforcing plate A crusher characterized in that the lower surface is fixed by build-up welding, and the upper end surface of the flat lower reinforcing swash plate and the lower surface of the front end claw portion are fixed by welding; As a result, the above-described problems have been solved.

  According to a third aspect of the present invention, in the crusher according to the first or second aspect, the tip claw portion is a sub tip claw portion installed at a predetermined interval on both sides of the main tip claw portion and the main tip claw portion. The above-mentioned problem is solved by using a crusher characterized by comprising:

  In the first aspect of the present invention, the wear resistance of the tip claw portion can be further improved by the presence of the upper reinforcing plate. In particular, the tip portion of the upper reinforcing plate is worn, and the tip portion of the upper reinforcing plate is worn just before the tip claw portion is worn while the tip portion of the upper reinforcing plate is worn according to the frequency of use. By replacing only the part with a new member, there is the greatest advantage that the life of the tip claw part can be further increased. In particular, the force is applied to the upper reinforcing plate portion, and the splitting or crushing operation can be sufficiently strengthened only by attaching by a little welding.

  In the invention of claim 2, since the lower reinforcing swash plate is also attached in addition to the upper reinforcing plate, the effect of being able to perform a sufficient crushing operation even if performing the splitting or crushing operation quite frequently. Play.

  According to a third aspect of the present invention, the tip claw portion is composed of a main tip claw portion and a sub tip claw portion having a predetermined interval on both sides of the main tip claw portion, so that the piercing operation is extremely effective. In addition, an effect such as being smooth can be exhibited.

Claims (5)

  A fixed jaw portion provided at the lower end of the crusher outer casing and a movable jaw portion provided on the fixed jaw portion so as to be freely opened and closed. The tough tip claw portion has a sharp triangular shape with a sharp tip when viewed from the side, and the front end of the fixed jaw portion and the rear end of the tip claw portion are fixed to cover the top surface of the tip claw portion. A crusher characterized in that an upper reinforcing plate having high hardness and toughness is provided, and a front end of the upper reinforcing plate is formed so as to protrude slightly from a tip of the tip claw portion.   2. The crusher according to claim 1, wherein a lateral width of the upper reinforcing plate is formed to be equal to a lateral width of the tip claw portion, and a lateral width portion of the upper reinforcing plate and an upper portion of the tip claw portion are fixed by welding. The crusher is characterized in that the lower surface of the tip of the upper reinforcing plate and the tip of the tip claw are fixed by overlay welding.   3. The crusher according to claim 1, wherein a lower reinforcing swash plate is provided that contacts the lower side surface of the upper end side of the upper reinforcing plate and covers the lower surface of the front end claw portion, and the front end of the lower reinforcing swash plate; A crusher characterized in that the lower surface of the upper reinforcing plate is fixed by overlay welding.   4. The crusher according to claim 3, wherein a lateral width of the lower reinforcing swash plate is formed to be equal to a lateral width of the tip claw portion, and a lateral width portion of the lower reinforcing swash plate and a lower surface of the tip claw portion are welded. A crusher characterized in that it is fixed. 5. The crusher according to claim 1, wherein the tip claw portion includes a main tip claw portion and a sub tip claw portion having a predetermined interval at both sides of the main tip claw portion. The crusher characterized by consisting of.

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