JPH04110856U - Crushing machine with fang parts - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the efficiency of crushing objects by devising the shape of the fang member provided on the fixed jaw. [Structure] A pair of fang members 1 attached to the tips of the movable jaws 51 of a crusher are formed so that the crushing portion 1a is thin and the side surface shape of the edge portion 1a' of the crushing portion 1a is formed into a substantially arc shape.
Further, the shape of the end edge portion 1a' in the thickness direction is also formed into a substantially circular arc shape, so that the edge portion 1a' of the crushed portion is formed into a curved surface. As a result, the crushing part 1a of the fang member 1 contacts the crushing target in a small area close to a point contact, and the crushing target surface is C to C.
Even if the fang member 1 is tilted as shown in 3, the pressing force of the fang member 1 is applied almost vertically and in a concentrated manner, so that the object to be crushed is effectively crushed with a small force.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a crusher for crushing concrete structures, etc. This invention relates to a crusher with improved fang shape.

0002

[Conventional technology]

The movable jaw, which is rotatably supported on the fixed jaw, is driven by a drive device such as a hydraulic cylinder. By operating the movable jaw and the fixed jaw, the target material is crushed. Devices for crushing cleat walls and the like are widely used.

0003 FIG. 6 shows this interlocking type crusher.

0004 In the figure, reference numeral 50 is a fixed jaw that forms part of the crusher main body, and 51 is a pivot support on this fixed jaw 50. It is a movable jaw that is rotated about a shaft 53 by a hydraulic cylinder 52. Possible A pair of fang-like members (hereinafter referred to as "fang members") 54, 54 are provided at the tip of the movable jaw 51. is fixed by strong fixing means such as welding. On the other hand, after the fixed jaw 50, the fang member 5 4, 54, three thick plates 55, 55, 55 are arranged at regular intervals. When the two jaws are engaged, the fang member of the movable jaw 51 54, 54 are configured to be located in the space between each thick plate material 55, and these The object to be crushed is roughly divided by the engagement of the fang members 54, 54 and the fork portion. ing. The object to be crushed further is the crushing tooth 56 formed on the movable jaw 51. , is broken into small pieces by engagement with the crushing surface on the fixed jaw 50 side.

[0005]

[Problem that the idea aims to solve]

Figures 7 and 8 show the fang member described above.

[0006] The fang member 54 has a thickness of about 10 centimeters, for example, and is integral with a uniform thickness. It is molded into. The tip portion 54a of the fang member 54 is a pressure contact portion that directly presses against the object to be crushed. It is rounded so that the pressure force is concentrated in a narrow area. Also 54b is possible This is the part that connects to the movable jaw 51, and usually this part 54b and the movable jaw 51 are melted together. By contacting them, the fang member 54 is firmly connected and fixed to the movable jaw 51.

[0007] This fang member 54 is formed by cutting and forming a thick steel plate into the shape shown. There is. Although this type of molding method is relatively easy to mold, there are some problems that have been pointed out. It is.

[0008] Figures 9 and 10 show how a concrete wall is crushed by a crusher having the fang member described above. Indicates the state of

[0009] The fang members 54, 5 are attached to the movable jaw 51 by the operation of the hydraulic cylinder of the crusher. 4 presses against the concrete wall C to be crushed, and presses it against the fixed jaw 50 side. This concrete wall C is bent by engagement with the thick plate material 55 forming the fork part. Crush (split into large pieces). The pressure contact portion 54a of the fang member 54 is round as shown in FIGS. Since the pressure contact portion 54a is molded, if the concrete wall C is flat, the pressure contact portion 54a is Theoretically, there will be a line contact with the wall surface.

When the fang member 54 is pressed against the concrete wall C by a predetermined force P1 as shown in FIG. 10, reaction forces P2 ₁ , P2 ₂ , P 2 ₃ . · is generated, and the pressing force P1 becomes larger than this reaction force, so that the concrete wall C is crushed.

In this case, there is no problem if the concrete wall C is flat, but for example, as shown in the figure, there is a recess C' in the concrete wall C, or even if there is no recess, there is a reinforcing bar in this part. If the strength is low, the reaction force P2 1 among the reaction forces P2 ₁ , P2 ₂ , P2 _{3 .} . . is small. Therefore, the vector of the pressure contact force P1 and the vector of the reaction forces P2 ₁ , P2 ₂ , P2 ₃ . It will work. As a result, bending stress is generated in the fang member 54, and this stress is concentrated around the connecting portion 54b. Therefore, it is necessary to weld the connecting portion 54b extremely carefully in anticipation of such a situation. Incidentally, the fang member 54 wears out over time and needs to be replaced periodically, but as mentioned above, the large amount of labor and time spent on welding makes this replacement work inefficient. Become. It is also possible to make the fang member thicker in order to increase the strength of the attachment part, but if this is done, the moment arm at the connecting part 54b will also increase, and the bending stress generated at the pressure welding part 54b will also increase. In the end, it does not solve the problem.

0012 In view of the above points, by reducing the area of the pressure welding part, that is, by reducing the shape of the pressure welding part. To prevent bending stress from occurring in the tooth member by making it sharp, or Moga Utility Model Publication No. 62-94253 and Utility Model Publication No. 60-43 designed to increase crushing efficiency 513, Utility Model Application Publication No. 55-126947, etc.

[0013] Among these, Utility Model Application Publication No. 62-94253 shows a disk-shaped one with a sharp point. However, this configuration corresponds to the crushing tooth 56 of the present case and is compatible with the fang member 54. This is not the case. Moreover, Utility Model Publication No. 60-43513 is the aforementioned Utility Model Publication No. 62-942. It has a protrusion similar in shape to the member shown in No. 53, but the fixed jaw part is Particular emphasis is placed on the function of grasping the object to be crushed, rather than the meshing structure with the fork part. The structure is as follows. Furthermore, Utility Model Application No. 55-126947 has a beak-shaped structure for the movable jaw. It has a structure in which the following members are installed, but the number of installed members is only one, and the above-mentioned Utility Model Publication Co., Ltd. It achieves the same purpose as No.-43513.

[0014]

[Means to solve the problem]

The present invention has been constructed in view of the prior art shown above, and is particularly designed to improve crushing efficiency. This is a crusher with a fang member that aims to improve the quality of the product.

[0015] In other words, it is a crusher consisting of a fixed jaw and a movable jaw, with a pair of fangs at the tip of the movable jaw. The tooth member is formed so that the fractured part is thinner than the main body of the fang member. The side shape of the fractured part is formed to draw a circular arc, and the side edge cross section of this circular arc is The shape is also formed to draw a circular arc, which allows the crushing part to be theoretically shaped relative to the object to be crushed. are configured for point contact.

[0016]

[Effect]

The fang member of the movable jaw first makes point contact with the object to be crushed by the operation of the movable jaw, and then By rotating the movable jaw, the fang member is crushed around this point of contact. Press. As this pressing force exceeds the reaction force of the crushing target, the crushing target becomes the pressed part. It is crushed around minutes.

[0017]

【Example】

Embodiments of the present invention will be specifically described below with reference to the drawings.

[0018] Figures 1 and 2 show the fang member. This fang member 1 includes fang members 54, 54 shown in FIG. Similarly, one member is attached to each side of the tip of the movable jaw 51 of the crusher. It is.

[0019] Arrow 1a indicates the crushing part that comes into direct contact with the object to be crushed, such as a concrete wall, and 1b indicates the crusher. This is a connection part that is welded and connected to the movable jaw 51 of. The entire fang member 1 is on the side shown in FIG. 1(A). It is formed to be curved like a surface shape, and when the movable jaw 51 is closed, the fracture portion 1a is formed in the fixed jaw 50. It faces the thick plate material 55 of. The entire Rutaga member 1 is made of thick steel material. It is configured. The reference numeral 54 in FIG. 1(B) indicates the conventional fang member described above. The fang member 1 of the present invention is made of thicker steel material than this conventional fang member. Ru. However, the fractured part 1a is roughly cut from the front so that it becomes thinner toward the tip end edge 1a'. It is formed into a wedge shape. In addition, this edge portion 1a' is on the side as shown in FIG. 1(A). The surface shape is shaped like an arc.

[0020] Next, the side arc-shaped end edge 1a', which is the part pressed against the crushing object, is not flat. In addition, the edge portion 1a' is formed into a round shape to draw a small arc in the thickness direction. Ru. Therefore, this edge portion 1a' has a curved surface as shown in FIG. others When the end edge 1a' comes into contact with a plane, the contact is theoretically a point contact. Ru.

[0021] A pair of fang members 1, 1 formed as described above can be used in a crusher as shown in FIG. 6, for example. It is fixed to both sides of the tip of the jaw 51 by welding. In this case, the entire fang member 1 is thicker than the conventional fang member 54, so it is fixed by welding. The range of the connecting portion 1b is also wide, so that it can be fixed more firmly to the movable jaw 51. becomes possible.

[0022] FIG. 3 shows the combination of the movable jaw 51 to which the fang members 1, 1 are attached and the fixed jaw 50. Indicates the condition. In addition, in the illustrated configuration, among the thick plate materials 55 forming the fork portion, The upper edge, which is the fractured part, is shaped into a round shape with a cross section that almost draws an arc as shown in the figure. ing.

Next, the state of crushing the object to be crushed will be explained, focusing on the action of the fang member 1. By rotating the movable jaw 51 so as to approach the fixed jaw 50 side, the edge portions 1a' of the two fang members 1, 1 attached to the movable jaw 1 are crushed with a pressing force P1, which is the concrete material C. press against. On the other hand, since the concrete material C is supported by the fork portion of the fixed jaw 50, reaction forces P2 ₁ , P2 ₂ , and P2 ₃ are generated, but if the pressing force P1 exceeds this reaction force, the concrete material C will be crushed. become. At this time, since the edge 1a' of the fractured part of the fang member 1 is in contact with the concrete material C over a small area close to a point contact, the pressing force P1 acts intensively on this contact part. As a result, it becomes possible to perform effective crushing with a relatively small pressing force. Furthermore, since the crushing part edge 1a' is covered with a curved surface as shown in FIG. 2, the pressing force P1 acts almost vertically no matter how inclined the surface in contact with the concrete material to be crushed is. That is, even if the concrete material C is inclined as shown in C1 and C with respect to the depth direction of the movable jaw 51 as shown in FIG. Therefore, the pressing force acts almost vertically at the contact portion, and similarly, as shown in FIG. 1(B), even if the fractured portion 1a is inclined as shown at C3 and C4 in the thickness direction, it still acts almost vertically. The same applies even if these slopes are compounded. As a result, irrespective of the shape of the object to be crushed, the real tooth member 1 always maintains high crushability, and no bending stress is generated on the tooth member 1 during crushing. Therefore, combined with the large size of the connecting portion 1b, there is no risk of problems with the attachment strength of the fang member 1.

[0024] FIG. 5 shows another embodiment of the invention.

[0025] In this embodiment, the fractured part 1a of the fang member 1 is molded separately from the fang member main body, and then attached to the main body. It is configured to have a fixed connection.

[0026] The reference numeral 1c in the figure is the main body of the fang member 1, and the broken part is formed separately from the main body 1c. The crushed portion 1a is fixed to the main body portion 1c by welding. On the other hand, the main body The connecting portion 1b of the portion 1c is semi-permanently connected and fixed to the movable jaw 51.

[0027] The crushing portion 1a is formed of a material with high wear resistance such as super steel, while the fang member body 1 c is formed from ordinary steel material. If configured as shown in Figure 5, the wear resistance of expensive materials such as super steel It is economical because the amount of materials used can be reduced. Please note that the crushing part may wear out due to long-term use. If this happens, separate this fractured part 1 from the fang member main body 1c and attach a new fractured part. Let's go.

[0028]

[Effect of the idea]

As specifically explained above, the present invention has been developed by modifying the shape of the fang member attached to the movable jaw. However, the fractured part is formed thinner than the main body of the fang member, and the side shape of the fractured part has an arc shape. The cross-sectional shape of this arc part is also shaped to draw a circular arc. Since the crushing part is in almost point contact with the target to be crushed. , the pressing force is concentrated on the contact area, making it possible to perform effective crushing with less force. .

[0029] Also, no matter what shape the object is to be crushed, the pressing force will not change its direction. Therefore, there is no bending stress on the tooth member, and therefore there is no bending stress on the moving jaw. The attachment strength of the fang member can be maintained at a high level at all times.

[Brief explanation of drawings]

FIG. 1 (A) is a side view of a fang member according to the present invention.
(B) It is a front view of the fang member shown in FIG. 1(A).

FIG. 2 is a perspective view of the fang member shown in FIG. 1;

FIG. 3 is a schematic front view of the crusher showing the state of crushing by the crusher of the present invention.

FIG. 4 is a partial front view of the fang member showing a state of crushing by the fang member.

FIG. 5 is a perspective view of a fang member showing another embodiment of the present invention.

FIG. 6 is a perspective view of a crusher to which the fang member is attached.

FIG. 7 is a side view of a conventional fang member.

8 is a perspective view of the fang member shown in FIG. 7, with the pressure contact portion facing upward; FIG.

FIG. 9 is a schematic front view of a crusher showing a state of crushing by a crusher using a conventional fang member.

FIG. 10 is a partial front view of the conventional fang member showing a state of crushing by the conventional fang member.

[Explanation of symbols]

1 Fang member 1a Fractured part (of fang member) 1a′ Edge of fractured part 1b Connection part (of the fang member) 1c Fang member body 50 Fixed jaw 51 Movable jaw 55 Thick plate material C Concrete material (wall) P1 Pressure force

Claims (3)

[Scope of utility model registration request] Claim 1: It has a fixed jaw and a movable jaw that is attached to rotate relative to the fixed jaw, and a pair of fang members are attached to the movable jaw, and a pair of fang members are fixed to the movable jaw. In the crusher configured to roughly divide an object to be crushed by the jaws, the fang member has a crushing part formed thinner than the fang member main body, and a side surface of the crushing part is shaped to draw an arc, and further A crusher having a fang member, characterized in that the cross-sectional shape of the edge of the arc portion is also shaped to draw a circular arc, so that the edge of the crushing portion of the fang member is in point contact with the object to be crushed. . 2. The tooth according to claim 1, wherein the crushing portion of the tooth member is formed separately from the tooth member body, and the crushing portion is configured to be fixed to the tooth member body. A crusher with parts. 3. Among the thick plate materials forming the fork portion of the fixed jaw located opposite to the fang member, the cross-sectional shape of the upper edge of the thick plate forming the crushing portion of the fork portion is formed into a substantially arc shape. A crusher having a fang member according to claim 1 or 2.