Method for assembling and disassembling a crusher

Abstract

To provide a method for assembling and disassembling a crusher that can efficiently assemble and disassemble a crusher used for crushing reinforced concrete and cutting reinforcing bars in the demolition of buildings. [Solution] Outside the main body basket The main body is equipped with a support shaft 7 that is inserted through a support hole 11h provided on the side of both housing parts 11 near the front opening 15, outside the main body basket The hydraulic cylinder 5 is housed in the front opening 15 of 1 from the piston rod 52 side, and also outside the main body basket The rear end of the piston rod 52 is pivotally supported on the rear side of 1, and the support shaft 7 is inserted through both support holes 11h. basket The rear end of the movable jaw 3 is housed in the front opening 15 of 1, and the rear end of the movable jaw 3 is outside the main body. basket The movable jaw 3 is pivotally supported between the two side surfaces 11 of the housing 1, and the pivot is used to suspend the movable jaw 3, and the front end of the cylinder portion 51 of the hydraulic cylinder 5 is pivotally supported against the movable jaw 3, and the support shaft 7 is removed from both support holes 11h.

Description

Technical Field

[0001] The present invention relates to an assembling method and a disassembling method for a crusher that can efficiently assemble and disassemble a crusher for crushing reinforced concrete and cutting steel bars in building demolition work.

Background Art

[0002] Conventionally, there are various types of crushers as attachments used by being mounted on construction machinery for crushing buildings that need to be demolished. As a typical one, there are many that have one movable jaw and one fixed jaw, and the movable jaw opens and closes by rotating with respect to the fixed jaw by the telescopic operation of a hydraulic cylinder, and crushes the object to be crushed made of reinforced concrete.

[0003] And, as a general type of this kind, the cylinder barrel portion of a hydraulic cylinder is housed in the housing of a crusher body in which the fixed jaw is integrally formed, and the piston rod is exposed from the crusher body to the outside and connected to the movable jaw in many cases. There is Patent Document 1 (Japanese Patent Laid-Open No. 11-19244) as this type of crusher. In the crushing operation, the piston rod is exposed between the crusher body and the movable jaw, and there is a sufficient risk that the flying fragments when the object to be crushed is crushed collide with the piston rod, damaging the surface of the piston rod, or the steel bar of the object to be crushed hits the piston rod and damages the surface. For this reason, oil leakage occurs from the damaged part of the piston rod, and the hydraulic cylinder deteriorates in a short period.

[0004] To avoid the inconvenience of the piston rod of a hydraulic cylinder being damaged by the rebound of crushed material during crushing, there are several models, as disclosed in Patent Document 2 (Japanese Patent Publication No. 7-204526), ​​in which the piston rod is housed within the casing of the crusher body and the cylinder is pivotally connected to the movable jaw. With such models, during crushing operations, the piston rod of the hydraulic cylinder is not exposed to the outside of the crusher body when the movable jaw is opened and closed, and the piston rod is protected by the crusher body.

[0005] In the case of a crusher disclosed in Patent Document 2 or a crusher having an equivalent structure, when it is assembled in a factory, the main body casing and the fixed jaws are generally fixed by welding, and the fixed jaws are welded to the main body casing with extremely high precision using jigs or the like. When the hydraulic cylinder and movable jaws are assembled to the main body casing, each rotates relative to the main body casing, and therefore the hydraulic cylinder and movable jaws are pivotally connected to the main body casing via connecting pin members. Furthermore, the movable jaws and the cylinder of the hydraulic cylinder are pivotally connected via connecting pin members.

[0006] Here, both the hydraulic cylinder and the movable jaw are extremely heavy, and are lifted using overhead cranes or similar equipment installed in the factory, and then pivotally connected to the main body's outer casing. In the final step, the pivotal connection of the hydraulic cylinder and the movable jaw, the hydraulic cylinder is usually performed with the piston rod retracted inside the cylinder in its shortest possible state, so it is necessary to pivotally connect the hydraulic cylinder and the movable jaw while they are lifted. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 11-192440 [Patent Document 2] Japanese Patent Application Publication No. 7-204526 [Overview of the project] [Problems that the invention aims to solve]

[0008] Patent Document 2 or a crusher with a similar structure has the excellent feature of being able to protect the piston rod of the hydraulic cylinder during crushing operations, but at the same time, as mentioned above, it also has the following problems in manufacturing and assembly. These problems will be explained below with reference to Figure 9, which shows the assembly method according to the prior art. Here, in Figure 9 of the prior art, the terms "body part a," "movable jaw b," and "hydraulic cylinder c" with reference numerals will be used. Also, the body part a is assumed to have a fixed jaw and be integrated with it.

[0009] In the manufacturing and assembly of crushers in a factory, the hydraulic cylinder c is typically assembled in a predetermined position with the piston rod c2 almost entirely housed within the cylinder tube portion c1, in its shortest, most retracted state. Therefore, in the first stage of assembly, the movable jaw b is pivotally mounted to the main body portion a, and the cylinder tube portion c1 of the hydraulic cylinder c is pivotally mounted to the main body portion a. A pivot refers to connecting two members in a pivotal state.

[0010] In the assembly of the crusher, the hydraulic cylinder c is pivotally supported on the main body a with the piston rod c2 completely housed within the cylinder tube c1, and the hydraulic cylinder c's extension and retraction length in the shortest possible state. Next, the movable jaw b is pivotally supported on the main body a so as to be able to open and close relative to the fixed jaw. The pivot point of the movable jaw b with respect to the main body a is the pivot center p1. Since the movable jaw b is pivotally supported in a free state, its weight causes it to be closed relative to the fixed jaw of the main body a [see Figure 9(A)]. Therefore, in order to pivotally connect the movable jaw b and the hydraulic cylinder c and pivotally support them by a connecting shaft, it is necessary to lift the movable jaw b at its free-rotating end using an overhead crane and align the positions of the connecting holes between the movable jaw b and the hydraulic cylinder c.

[0011] Here, the position of the connecting hole for pivoting the movable jaw in the hydraulic cylinder c must be located on the rotational trajectory circle of the connecting hole, which is centered on the rotational center p1 of the movable jaw b. Therefore, the hydraulic cylinder c must be lifted upward by an overhead crane at its free-rotating end so that the connecting hole of the hydraulic cylinder c is located on the aforementioned trajectory circle. With the hydraulic cylinder c lifted in this way, another overhead crane is required to further lift the free-rotating end of the movable jaw b. Furthermore, when the free-rotating end of the movable jaw b is lifted, there is a risk that the wire of the overhead crane lifting the hydraulic cylinder c and the lifted movable jaw b may interfere with each other [see Figure 9(B)], and even if assembly is completed, it will be difficult to detach the wire from the hydraulic cylinder c.

[0012] Such work requires at least two overhead cranes, making it impossible to assemble crushers in relatively small factories without adequate equipment. Furthermore, in factories with only one overhead crane, workers would have to lift the free-rotating end of the hydraulic cylinder while simultaneously using the overhead crane to hoist the free-rotating end of the movable jaw b, which is an extremely difficult and dangerous task for the workers. Therefore, the problem (technical problem or objective, etc.) that this invention aims to solve is to provide a method for assembling a crusher that is extremely simple and efficient, does not burden the workers, and maintains safety. [Means for solving the problem]

[0013] Therefore, the inventor diligently conducted research to solve the above problems and has now developed the invention of claim 1, a crusher comprising a box-shaped main body outer casing in which two housing side parts made of metal plates are arranged parallel to each other at a predetermined distance on both sides in the width direction, and a rectangular front opening is formed on the front, with a fixed jaw integrally formed on the front side of the lower part of the main body outer casing when viewed from the side, and a movable jaw that protrudes from the front opening on the upper part of the main body outer casing and rotates with the fixed jaw, the front end of the cylinder part of the hydraulic cylinder that drives the movable jaw is pivotally supported on the front side of the movable jaw, and the rear end of the piston rod is pivotally supported on the rear side of the main body outer casing, wherein the support provided on both housing side parts of the main body outer casing closer to the front opening is The above problems were solved by providing a crusher assembly method characterized by having a support shaft inserted through a support hole, housing the hydraulic cylinder from the piston rod side in the front opening of the main body outer casing, pivotally supporting the rear end of the piston rod on the back side of the main body outer casing, inserting the support shaft through both support holes, housing the rear end of the movable jaw in the front opening of the main body outer casing, pivotally supporting the rear end of the movable jaw between the two side surfaces of the main body outer casing, lifting and rotating the movable jaw with a lifting machine using the pivot point between the movable jaw and the main body outer casing as the pivot center of the movable jaw, pivotally supporting the front side of the movable jaw and the front end of the cylinder portion of the hydraulic cylinder in alignment, and removing the support shaft from both support holes. The above problems were solved by providing the invention of claim 2 as a crusher assembly method according to claim 1, characterized in that a magnetic plate is provided at the lower end of the main body outer casing.

[0014] The invention of claim 3 is a crusher comprising a box-shaped main body outer casing in which two housing side portions made of metal plates are arranged parallel to each other at a predetermined distance on both sides in the width direction, and a rectangular front opening is formed on the front, with a fixed jaw integrally formed on the front side of the lower part of the main body outer casing when viewed from the side, and a movable jaw that protrudes from the front opening on the upper part of the main body outer casing and rotates with the fixed jaw, the front end of the cylinder portion of a hydraulic cylinder that drives the movable jaw is pivotally supported on the front side of the movable jaw, and the rear end of the piston rod is pivotally supported on the rear side of the main body outer casing, wherein the main body outer casing is provided on both of the housing side portions closer to the front opening side. The above problem is solved by a method for disassembling a crusher characterized by comprising a support shaft inserted through a support hole, the movable jaw being opened to its maximum extent, the support shaft being inserted through both support holes, the pivot between the front end of the cylinder portion of the hydraulic cylinder and the front side of the movable jaw being released to separate the movable jaw and the hydraulic cylinder, and the cylinder portion of the hydraulic cylinder being placed on the support shaft, the movable jaw being lowered using a lifting machine with the pivot point with the main body outer casing as the pivot point to close it, the pivot between the main body outer casing and the movable jaw being released and separated, the pivot between the main body outer casing and the hydraulic cylinder being released and separated, and the support shaft being removed from the support hole. The above problem is solved by modifying the invention of claim 4 to be a method for disassembling a crusher as described in claim 3, characterized in that a magnetic plate is provided at the lower end of the main body outer casing. [Effects of the Invention]

[0015] In the invention of claim 1, the piston rod of the hydraulic cylinder is housed inside the main body casing when the movable jaw is closed, and the cylinder portion protrudes from the main body casing. In this type of crusher, such a crusher can be assembled in a factory very simply and efficiently. To elaborate on this effect, the present invention is equipped with a support shaft, and support holes are provided on both sides of the main body casing and near the upper end of the front opening.

[0016] Furthermore, in the invention of claim 1, after pivotally supporting the rear end of the piston rod of the hydraulic cylinder on the rear and inner side of the main body outer casing, the support shaft is inserted through both support holes on the sides of both casings, and the cylinder portion of the hydraulic cylinder pivotally supported on the main body outer casing is placed on the support shaft, thereby temporarily installing the hydraulic cylinder on the main body outer casing 1 in an inclined state where the front end of the hydraulic cylinder is above the main body outer casing. In other words, the connection hole on the free end side of the hydraulic cylinder can be aligned with the rotational trajectory of the connection hole that pivotally supports the hydraulic cylinder with the movable jaw pivotally supported on the main body outer casing. Then, the movable jaw is pivotally supported on the main body outer casing so that it can be opened and closed vertically, and by lifting the movable jaw so that it rotates from the closed state to the open state, the pivotal support positions of the hydraulic cylinder and the movable jaw are aligned, and by pivotally supporting both, assembly can be easily performed, and after assembly is complete, the support shaft can be pulled out from both support holes to produce a proper product.

[0017] In this way, by simply inserting the support shaft through both support holes in the outer casing of the main body, the free-rotating end of the hydraulic cylinder pivotally supported by the outer casing can be kept in an upward position, allowing for extremely simple and quick assembly, and enabling assembly even in small factories equipped with only one overhead crane or similar equipment. Furthermore, the assembly of the crusher can be carried out without burdening workers and while maintaining safety. In the invention of claim 2, the same assembly method as in claim 1 can be applied to a crusher equipped with a magnetic plate at the lower end of the outer casing of the main body, and the same effect can be achieved. The assembled crusher can crush reinforced concrete and also suck up reinforcing bars, allowing only the reinforcing bars to be extracted.

[0018] In the invention of claim 3, when disassembling the crusher for maintenance, inspection, or repair, the support shaft is first inserted through the support holes on both sides of the outer casing of the main body. In the next step, since the hydraulic cylinder is mounted on the support shaft, the pivot connection between the hydraulic cylinder and the movable jaw can be easily and safely disconnected. As a result, by removing the movable jaw from the outer casing and then the hydraulic cylinder from the outer casing, disassembly can be performed very simply and quickly, and furthermore, the disassembly of the crusher can be performed without burdening the workers and with safety maintained. In the invention of claim 4, the same disassembly method as in claim 3 can be applied to a crusher equipped with a magnetic plate at the lower end of the outer casing of the main body, and the same effect can be achieved. [Brief explanation of the drawing]

[0019] [Figure 1] (A) is a perspective view of the crusher in its assembled state according to the present invention, and (B) is a perspective view of the crusher in its disassembled state with the main parts separated. [Figure 2] (A) is a perspective view showing the installation of a hydraulic cylinder on the main body casing, (B) is a perspective view showing the insertion of a support shaft into a support hole in the main body casing, and (C) is a perspective view showing the hydraulic cylinder mounted on the main body casing resting on the support shaft. [Figure 3] (A) is a longitudinal cross-sectional side view showing assembly process 1, in which the hydraulic cylinder is lifted by an overhead crane and pivotally supported on the main body casing; (A-1) is an end view of (A) taken along the line Y1-Y1; (B) is a longitudinal cross-sectional side view of assembly process 2, in which the hydraulic cylinder is pivotally supported on the main body casing and the cylinder portion of the hydraulic cylinder is placed on a support shaft; and (B-1) is an end view of (B) taken along the line Y2-Y2. [Figure 4] (C) is a longitudinal cross-sectional side view showing assembly step 3, in which the movable jaw is lifted by an overhead crane and pivotally supported on the main body's outer casing, and (D) is a longitudinal cross-sectional side view showing assembly step 4, in which the movable jaw is pivotally supported on the main body's outer casing in a closed state. [Figure 5](E) is a longitudinal side view showing the assembly process 5 of suspending the movable jaw with a ceiling crane to an open state and pivotally supporting the movable jaw and the hydraulic cylinder, and (F) is the assembly process 6 of pulling out the support shafts from both support holes of the main body outer housing: the final longitudinal side view. [Figure 6] (A) is a longitudinal side view of the disassembly process 1 of inserting support shafts into both support holes of the main body outer housing and suspending the movable jaw with a ceiling crane to an open state, and (B) is a longitudinal side view of the disassembly process 2 of separating and detaching from the pivotally supported state of the movable jaw and the hydraulic cylinder. [Figure 7] (C) is a longitudinal side view of the disassembly process 3 of suspending the movable jaw from the main body outer housing with a ceiling crane and detaching it from the main body outer housing, and (D) is the disassembly process 4 of removing the hydraulic cylinder from the main body outer housing: the final longitudinal side view. [Figure 8] (A) is a longitudinal side view of the crusher according to the present invention equipped with equipment such as a hydraulic hose, (B) is another embodiment of the present invention in which an electromagnet is provided on the lower side of the small crusher, and is a perspective view of the crusher seen from below, and (C) is a longitudinal side view of (B). [Figure 9] (A) and (B) are longitudinal side views showing the steps of a conventional assembly method in the crusher.

Embodiments for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described based on the drawings. First, after explaining the structure of the crusher A in the present invention, the assembly method and the disassembly method will be described. The crusher A in the present invention mainly includes a main body outer housing 1, a fixed jaw 2, a movable jaw 3, cutting blades 4a, 4b, a hydraulic cylinder 5, etc., as shown in FIGS. 1, FIG. 2, etc. The crusher A is, for example, for small crushing, etc., and further crushes the crushed materials of reinforced concrete generated by demolishing buildings into finer pieces. The crusher A is attached as an attachment to the tip of the arm of a construction vehicle such as a hydraulic excavator not shown.

[0021] For the sake of explanation, the crusher A has defined front-rear and width directions. The front-rear direction in the crusher A is the continuous front-rear direction between the main body casing 1 and the fixed jaws 2 when viewed from the side, as shown in Figures 1 and 2, with the fixed jaws 2 side being the front and the main body casing 1 side being the rear. In other words, the side of the crusher A that crushes materials such as concrete with the fixed jaws 2 and movable jaws 3 is the front, and the side that is attached to the boom tip of a construction vehicle such as a hydraulic excavator (not shown) is the rear. The width direction of the crusher A is the direction perpendicular to the front-rear direction on the horizontal plane. The front-rear direction of the movable jaws 3 and hydraulic cylinder 5 follows the front-rear direction of the crusher A.

[0022] Furthermore, the vertical direction is the direction perpendicular to the front-to-back direction on a vertical plane. In this invention, the horizontal state of the crusher refers to the state shown in Figure 8(A) where the front end of the crusher is located downwards and the rear end is located upwards. Therefore, in Figures 3 to 7, the main body outer casing 1 is placed on the work platform, and the rear side of the main body outer casing 1 slopes downwards and the front side slopes upwards, so the arrows indicating the front-to-back and vertical directions are also inclined.

[0023] The main body outer casing 1 consists of two housing side sections 11, 11 made of metal plates arranged parallel to each other at a predetermined distance on both sides in the width direction, a housing top section 12 provided on the upper surfaces of both housing side sections 11, 11, a housing rear section 13 provided on the backs of both housing side sections 11, 11, and a housing bottom section 14 provided on the bottom surface of the rear section 13. These are integrated by welding, forming a housing with an internal space [see Figures 3 to 6 and Figure 8(A), etc.].

[0024] A rectangular front opening 15 is formed on the front of the main body outer casing 1 (see Figures 1(B), 2, 3 to 7 and 8(A)). Specifically, this front opening 15 is the void enclosed by both of the aforementioned casing side portions 11, 11, the casing top portion 12, the casing rear portion 13, and the casing bottom portion 14, that is, an opening that separates the outside of the main body outer casing 1 from the interior space. In other words, the interior and exterior of the main body outer casing 1 are distinguished by the front opening 15 as the boundary.

[0025] The fixed jaw 2 is formed from metal plates in a predetermined shape, similar to the main body outer casing 1, and these are combined and joined by welding. The main body outer casing 1 and the fixed jaw 2 are formed as an integral housing. In this description, the fixed jaw 2 refers to the portion that protrudes forward in the front-rear direction of the main body outer casing 1 from the lower end directly below the front opening 15 of the main body outer casing 1 [see Figures 1(A), 2(A), and 3 to 7].

[0026] The upper surface of the fixed jaw 2 is formed flat as a crushing work surface 2a, and a through hole 21 is provided in the crushing work surface 2a. The through hole 21 is positioned to correspond to the crushing blade 33 of the movable jaw 3, and when the movable jaw 3 is closed in opening and closing operation, the crushing blade 33 is inserted into the through hole 21 (see Figure 4(D)). The through hole 21 serves to remove the small concrete chunks crushed by the crushing blade 33 of the movable jaw 3 from the crushing work surface 2a of the fixed jaw 2.

[0027] The movable jaw 3 is pivotally supported on the main body casing 1 so as to be able to rotate vertically (see Figures 1 and 2(A)). Being pivotally supported means that the movable jaw 3 is connected to the main body casing 1 in a pivotal manner. The portion of the movable jaw 3 pivotally supported on the main body casing 1 is referred to as the movable jaw pivot support portion 3s. Due to this movable jaw pivot support portion 3s, the free end of the movable jaw 3 is able to rotate freely around the movable jaw pivot support portion 3s as the pivot point, allowing it to open and close on a plane perpendicular to the main body casing 1.

[0028] In other words, the movable jaw 3 is configured to protrude forward from the front opening 15 of the main body outer casing 1 and to rotate on its vertical plane relative to the fixed jaw 2 [see Figures 1(A) and 8(A)]. The fixed jaw 2 is integrally configured to protrude downward and forward from the front opening 15 of the main body outer casing 1, and the movable jaw 3 rotates (oscillates) vertically on the fixed jaw 2 in its fixed state to perform the opening and closing operation [see Figure 1(A)].

[0029] The movable jaw 3 consists of a movable crushing section 31, which is the free-rotating end on the front side in the front-rear direction, and a pivot base 32, which is the pivot center on the rear side. The pivot base 32 is understood to be the root of the movable jaw 3. A pivot connection hole 32a is formed in the pivot base 32. In addition, a rotating connection hole 31a is formed in the movable crushing section 31, which pivotally connects to the tip of the cylinder portion 51 of the hydraulic cylinder 5 [see Figures 1, 3(B) and 4(A)].

[0030] The pivot connection hole 32a of the pivot base 32 of the movable jaw 3 is located near the front opening 15 of the main body outer casing 1, near the lower end in the vertical direction, and is positioned in the pivot connection holes 11b, 11b formed on both sides 11, 11 of the casing. The movable jaw pivot shaft 16 is inserted into both pivot connection holes 11b, 11b and the pivot connection hole 32a of the movable jaw 3, pivotally connected and pivotally supported. This pivotally connected pivot support is called the movable jaw pivot support 3s [see Figures 1(A), 4(D), and 5].

[0031] Support holes 11h, 11h are formed in each of the two side surfaces 11, 11 of the main body outer casing 1. Both support holes 11h, 11h are formed on both side surfaces 11, 11 of the main body outer casing 1 and closer to the front opening 15 side (see Figures 2(C), 2, 3, etc.). Both support holes 11h, 11h are formed in advance when the two side surfaces 11, 11 are manufactured. A support shaft 7, which will be described later, is inserted through both support holes 11h, 11h (see Figures 1(B), 2, 3, etc.). Details of the support shaft 7 will be described later.

[0032] The movable jaw 3 is provided to be able to rotate vertically relative to the fixed jaw 2, and the movable jaw 3 opens and closes by rotating relative to the immovable fixed jaw 2. As a result, concrete blocks are crushed between the crushing blade 33 of the movable crushing section 31 and the crushing work surface 2a. Note that the term "rotation" in this invention may be interpreted as "oscillating". The movable jaw 3 is provided for rotation (oscillating) by a hydraulic device such as a hydraulic cylinder 5 provided on the outer casing of the main body 1.

[0033] The hydraulic cylinder 5 consists of a cylinder barrel 51 and a piston rod 52, and the piston rod 52 is positioned on the rear side of the main body outer casing 1, that is, on the rear side in the front-rear direction of the main body outer casing 1 [see Figures 1(B), 2(A), and 3 to 5]. The hydraulic cylinder 5 is positioned with its axial direction approximately horizontal, with the cylinder barrel 51 side facing forward and the piston rod 52 side facing rear [see Figures 1(B), 2(A), and 3 to 5].

[0034] The hydraulic cylinder 5 has an annular cylindrical connecting portion 51a formed at the front end of the cylinder barrel portion 51 in the front-rear direction (see Figures 1(B), 2(A), 3(A), etc.), which is the part that pivotally connects to the movable jaw 3. The cylindrical connecting portion 51a is a part that has a through hole for connection to form a pivot.

[0035] The hydraulic cylinder 5 is pivotally connected to a cylinder support shaft 17 located at the rear of the main outer casing 1, near the upper end in the vertical direction, extending between the two side surfaces 11, 11 of the casing. Here, the cylinder support shaft 17 is a separate component from the main outer casing 1 and is attached to the two side surfaces 11, 11 of the casing when the hydraulic cylinder 5 is installed. Hydraulic cylinder connection holes 11a, 11a for inserting the cylinder support shaft 17 are formed in the two side surfaces 11, 11 of the casing [see Figure 1(B)].

[0036] The hydraulic cylinder 5 has a cylinder-side connecting portion 51a formed at the front end of the cylinder cylinder portion 51, and a rod-side connecting portion 52a formed at the rear end of the piston rod 52 [see Figure 1(B)]. The rod-side connecting portion 52a is a part that has an axial hole into which the cylinder-side pivot shaft 17, which will be described later, is inserted. The cylinder-side connecting portion 51a is a part that has an axial hole for connecting to form a pivot. The rod-side connecting portion 52a of the hydraulic cylinder 5 is pivotally connected to the cylinder pivot shaft 17, which is located at the rear and inner side of the main body outer casing 1 and between the two housing side portions 11, 11 [see Figures 1 and 2(A)].

[0037] Specifically, the rod-side connecting portion 52a of the hydraulic cylinder 5 is positioned at the hydraulic cylinder connecting holes 11a, 11a on both sides 11, 11 of the main body outer casing 1. The cylinder-side pivot shaft 17 is inserted into both hydraulic cylinder connecting holes 11a, 11a and the rod-side connecting portion 52a of the hydraulic cylinder 5, thereby pivotally supporting the hydraulic cylinder 5 on the main body outer casing 1. This pivotally supported portion is referred to as the hydraulic cylinder pivot portion 5s (see Figures 1(A), 3(B), 4, and 5). The hydraulic cylinder 5 can reciprocate vertically with respect to the main body outer casing 1, with the hydraulic cylinder pivot portion 5s as the pivot point. The cylinder-side connecting portion 51a of the cylinder portion 51 of the hydraulic cylinder 5, to which the rod-side connecting portion 52a of the piston rod 52 is pivotally supported on the main body outer casing 1, and the pivot connecting hole 31a of the movable jaw 3 pivotally supported on the main body outer casing 1 are aligned, and the connecting shaft 18 is inserted to pivotally connect them (see Figure 5).

[0038] Furthermore, two internal hydraulic passages 52b and 52c are provided within the piston rod 52 (see Figure 3(B-1)). The internal hydraulic passage 52b is formed to communicate from the rear end of the piston rod 52 to the front end of the piston rod 52. The internal hydraulic passage 52b is formed to penetrate the inside of the piston rod 52 from the rear end of the piston rod 52 and communicate with the cylinder section 51. Various equipment and components such as hydraulic equipment are provided inside the main body casing 1. Specifically, equipment such as the hydraulic cylinder 5, internal hydraulic hose 61, and branching plate are provided, and an external hydraulic hose 62 is provided on the outer surface of the main body casing 1 (see Figure 8(A)).

[0039] Next, the assembly method of the crusher A according to the present invention (assembly process and setup, etc.) will be described. First, in order to carry out the assembly method according to the present invention, support holes 11h, 11h provided in the main body outer casing 1 and a support shaft 7 are required [see Figures 1(A), 2, and 3]. Both support holes 11h, 11h are formed on both side surfaces 11, 11 of the main body outer casing 1 and are located closer to the front opening 15. Both support holes 11h, 11h are formed in advance on both side surfaces 11, 11 of the casing during manufacturing.

[0040] The support shaft 7 is inserted through both support holes 11h, 11h and installed so as to be perpendicular to both housing side surfaces 11, 11 across both housing side surfaces 11, 11 [see Figures 1(B), 2(B), (C), and 3]. Therefore, the axial length of the support shaft 7 is formed to be longer than the distance between the two housing side surfaces 11, 11 [see Figure 3(B-1)].

[0041] It is preferable that the support shaft 7 be detachable from both support holes 11h, 11h, so that the support shaft 7 can be easily inserted into and removed from the support holes 11h, 11h. The length of the support shaft 7 is determined by the distance between the two support holes 11h, 11h, and the distance between the two support holes 11h, 11h is determined by the distance between the two housing side portions 11, 11, that is, by the size of the crusher A.

[0042] [Regarding assembly instructions] The assembly method, or assembly process, will be described below. Here, the assembly process will be referred to as Assembly Process 1 to Assembly Process 6, and these processes are shown in Figures 3 to 5. For convenience, Figures 3 to 5 are drawn as longitudinal cross-sectional side views to facilitate understanding of the explanation of the main body outer casing 1 and movable jaw 3 of the crusher A. Inside the assembly plant, the main body outer casing 1 is placed on the work floor with its vertical orientation, tilted downwards and its front side upwards (see Figures 3 to 5). The front opening 15 is tilted slightly upwards.

[0043] Furthermore, in the assembly and disassembly of the crusher A in this invention, a lifting machine is used to lift the crusher A and its constituent parts, such as the main outer casing 1, movable jaws 3, and hydraulic cylinder 5. In this invention, it is assumed that the assembly and disassembly of the crusher A are carried out inside a factory. Therefore, the lifting machine is an electric overhead crane 9, but a simple manual crane may also be used. Also, depending on the situation, the assembly and disassembly of the crusher A may be carried out outdoors, in which case the lifting machine may be a crane mounted on a truck.

[0044] [Assembly Process 1] As part of assembly process 1, the hydraulic cylinder 5 is lifted using an overhead crane 9 and inserted and stored into the front opening 15 of the main body outer casing 1 from the piston rod 52 side [see Figure 3(A)]. At this time, the hydraulic cylinder 5 is in a fully retracted state in which the piston rod 52 is completely housed in the cylinder barrel 51, that is, in the shortest state in the axial direction [see Figure 3(A)].

[0045] [Assembly Process 2] Next, in assembly step 2, the rear end of the piston rod 52 of the hydraulic cylinder 5 is pivotally supported on the main body outer casing 1 [see Figure 3(B)]. Regarding the pivotal support between the main body outer casing 1 and the hydraulic cylinder 5, as described above, the rod-side connecting portion 52a on the rear end of the piston rod 52 of the hydraulic cylinder 5 is positioned at the hydraulic cylinder connecting holes 11a, 11a on the inner side of both housing sides 11, 11 inside the main body outer casing 1. The cylinder-side pivot shaft 17 is inserted into both hydraulic cylinder connecting holes 11a, 11a and the rod-side connecting portion 52a of the hydraulic cylinder 5, thereby pivotally supporting the hydraulic cylinder 5 on the main body outer casing 1 and forming the hydraulic cylinder pivot portion 5s [see Figures 2(A) and 3(B)].

[0046] In assembly process 2, the hydraulic cylinder 5 is rotatable around the hydraulic cylinder pivot 5s, which is the pivot point with the main body outer casing 1. Then, the overhead crane 9 lifts the cylinder section 51 upwards, adjusting the axial direction of the hydraulic cylinder 5 so that it is approximately parallel to the top surface 12 of the casing [see Figure 3(B)]. The lifting of the cylinder section 51 is performed by the overhead crane 9 (lifting machine) in the factory. Furthermore, the cylinder section 51 of the hydraulic cylinder 5 is positioned above both support holes 11h, 11h [see Figure 3(A)]. After confirming that the cylinder section 51 of the hydraulic cylinder 5 is placed on the support shaft 7, the suspension of the overhead crane 9 from the hydraulic cylinder 5 is released, and the overhead crane (lifting machine) 9 is pulled away from the hydraulic cylinder 5.

[0047] Next, the support shaft 7 is inserted through the support holes 11h, 11h of the respective side surfaces 11, 11 of both housings [see Figures 2(A), (B), and 3(A)]. At this time, the support shaft 7 is set to be located below the cylinder portion 51 of the hydraulic cylinder 5. With the support shaft 7 inserted through both support holes 11h, 11h, it forms a bridge-like structure between the side surfaces 11, 11 of both housings. Then, the cylinder portion 51 of the hydraulic cylinder 5 is placed on the support shaft 7, and the hydraulic cylinder 5 is temporarily installed [see Figures 3(B) and (B-1)].

[0048] [Assembly process 3 and assembly process 4] Next, in assembly step 3, the movable jaw 3 is lifted by an overhead crane (lifting machine) 9, and the pivot base 32, which is the rear side of the movable jaw 3, is housed in the main body outer casing 1 from the front opening 15 toward the rearward side [see Figure 4(C)]. Then, in assembly step 4, the rear side of the movable jaw 3 is pivotally supported between the two side parts 11, 11 of the main body outer casing 1 [see Figure 4(D)]. Specifically in assembly step 4, the pivot connection hole 11b of the main body outer casing 1 and the pivot connection hole 32a of the pivot base 32, which is the rear side of the movable jaw 3 are aligned, and the movable jaw pivot shaft 16 is pivotally connected to form the movable jaw pivot 3s [see Figures 1(B) and 4(D)]. In assembly step 4, the movable jaw 3 is located downward in the vertical direction and is closed relative to the fixed jaw 2.

[0049] [Assembly Process 5] Next, in assembly step 5, the movable jaw 3 is lifted by an overhead crane (lifting machine) 9 with the movable jaw pivot 3s as the pivot point, and the position of the rotational connection hole 31a of the movable crushing section 31, which is the free rotation end of the movable jaw 3, is aligned with the position of the cylindrical connection section 51a, which is the connection hole of the hydraulic cylinder 5 [see Figure 5(E)].

[0050] Next, the connecting shaft 18 is inserted into the cylindrical connecting portion 51a at the front end of the cylinder portion 51 of the hydraulic cylinder 5 and the rotating connecting hole 31a formed in the movable crushing portion 31, which is the front side of the movable jaw 3, and is pivotally supported by a pivot connection [see Figure 5(E)]. The movable jaw 3 is aligned with the rotating connecting hole 31a and the cylindrical connecting portion 51a of the hydraulic cylinder 5, and the connecting shaft 18 is inserted into both to form a rotating shaft support S. The rotating shaft support S moves vertically along a circular orbit as the movable jaw 3 opens and closes relative to the fixed jaw 2.

[0051] [Assembly Process 6: Final] Next, in assembly step 6, the support shaft 7 is removed from both support holes 11h, 11h, completing the assembly of the crusher A (see Figure 5(F)). This allows the movable jaw 3 to rotate vertically relative to the fixed jaw 2 by extending and retracting the hydraulic cylinder 5, enabling crushing work by opening and closing together with the fixed jaw 2. Assembly step 6 is the final assembly step.

[0052] Here, the pivot point 3s of the movable jaw 3, which is pivotally supported on the main body outer casing 1, is defined as the pivot point of the movable jaw 3, and the rotational trajectory of the diameter center point of the pivot connection hole 31a of the movable crushing section 31 when the movable jaw 3 rotates is defined as the trajectory circle R. The center point of the cylinder-side connection part 51a at the front end of the cylinder cylinder portion 51 of the hydraulic cylinder 5 is set to lie on the circumference of the trajectory circle R.

[0053] In other words, the positions of the support holes 11h, 11h on both side surfaces 11, 11 of the main body outer casing 1 are set so that the center point of the cylindrical connecting portion 51a of the hydraulic cylinder 5 mounted on the support shaft 7 is located or approximately located on the trajectory circle R (see Figures 4(D) and 5(E)). This allows the center points of the pivot connecting hole 31a of the movable jaw 3 and the hole in the cylindrical connecting portion 51a of the hydraulic cylinder 5 to coincide, making it easier to align the pivot connecting hole 31a and the hole in the cylindrical connecting portion 51a and to insert the connecting shaft 18. The pivot shaft support S described above then rotates along the trajectory circle R.

[0054] [Regarding disassembly methods] Next, the method of disassembling the crusher according to the present invention, i.e., the disassembly process, will be described. Here, the disassembly process will be referred to as disassembly process 1 to disassembly process 4, and these processes are shown in Figures 6 and 7. For convenience in order to make the explanation easier to understand, Figures 6 and 7 are drawn as longitudinal cross-sectional side views. Furthermore, in the disassembly process, there is wording that the movable jaw pivot support 3s, the hydraulic cylinder pivot support 5s, and the rotating pivot support S are released respectively. This means that the connection of the pivotal connection structure in each pivot state is disconnected, making the two connected parts separable.

[0055] [Disassembly process 1] As part of the disassembly process 1, the movable jaw 3 is set to its maximum open position relative to the fixed jaw 2 [see Figure 6(A)]. At this time, it is preferable to set the movable jaw 3 to its maximum open position relative to the fixed jaw 2 in advance before entering the disassembly process, but if the movable jaw 3 is in the closed position, the movable jaw 3 may be lifted by an overhead crane (lifting machine) 9. Then, the support shaft 7 is inserted through both support holes 11h, 11h of the main body outer casing 1, and preparations are made so that the cylinder portion 51 of the hydraulic cylinder 5 can be placed on the support shaft 7 [see Figure 6(A)].

[0056] [Disassembly process 2] Next, in disassembly step 2, the connecting shaft 18 is removed from the cylindrical connecting portion 51a at the front end of the cylinder portion 51 of the hydraulic cylinder 5 and from the rotating connecting hole 31a on the movable crushing portion 31 side of the movable jaw 3, thereby releasing the rotating shaft support S between the hydraulic cylinder 5 and the movable jaw 3 and separating them [see Figure 6(B)]. The movable jaw 3 and the hydraulic cylinder 5 are separated, and the cylinder portion 51 of the hydraulic cylinder 5 is placed on the support shaft 7. In reality, the cylinder portion 51 of the hydraulic cylinder 5 is placed on the support shaft 7 at the same time as the movable jaw 3 and the hydraulic cylinder 5 are separated.

[0057] [Disassembly process 3] Next, in disassembly step 3, the movable jaw 3 is lowered using an overhead crane (lifting machine) 9, with the movable jaw pivot 3s on the main body outer casing 1 as the pivot point, and while closing it to the fixed jaw 2, the movable jaw pivot shaft 16 is removed from the pivot connection hole 11b of the main body outer casing 1 and the pivot connection hole 32a of the movable jaw 3, releasing the movable jaw pivot 3s and separating the main body outer casing 1 and the movable jaw 3. Then the movable jaw 3 is removed and separated from the main body outer casing 1 [see Figure 7(C)].

[0058] [Disassembly step 4: Final] Next, in disassembly step 4, the cylinder-side support shaft 17 is removed from the hydraulic cylinder connection holes 11a, 11a of the main body outer casing 1 and the rod-side connection part 52a of the hydraulic cylinder 5, releasing the hydraulic cylinder shaft support 5s. The hydraulic cylinder 5, which is mounted on the support shaft 7, is then lifted by the overhead crane 9 to release the hydraulic cylinder shaft support 5s between the main body outer casing 1 and the hydraulic cylinder 5 [see Figure 7(D)]. Next, the hydraulic cylinder 5 is removed and separated from the main body outer casing 1. Then, the support shaft 7 is removed from both support holes 11h, 11h of the main body outer casing 1. Here, it is also acceptable to remove the support shaft 7 from both support holes 11h, 11h of the main body outer casing 1 before removing the hydraulic cylinder 5 from the main body outer casing 1. Disassembly step 4 is the final disassembly step.

[0059] Regarding the crusher A in the present invention, there is another embodiment in which an electromagnet-equipped crusher A is provided with a magnetic plate 8 on the lower side of the main body outer casing 1, as shown in Figures 8(B) and (C). In this alternative embodiment of crusher A, the crusher A has the advantage that the reinforcing bars separated by the crushing of reinforced concrete blocks can be bundled together at once by the magnetic force of the magnetic plate 8, making cleanup easy. The assembly and disassembly methods described above can also be easily applied to this alternative embodiment of crusher A. In other words, it is the same as the crusher A of the first embodiment of the present invention, except that the main body outer casing 1 is equipped with a magnetic plate 8, and the assembly and disassembly methods of the crusher A of the first embodiment can be applied.

[0060] The assembly and disassembly methods for crusher A in this invention are based on the premise that the assembly and disassembly of crusher A are performed inside a factory. However, if necessary, the assembly and disassembly methods for crusher A may also be applied outdoors, such as at a building demolition site. Therefore, the assembly and disassembly of crusher A may be performed outdoors (such as at a building demolition site) in accordance with the assembly steps 1 to 6 and disassembly steps 1 to 4 described above, and the lifting equipment used will be a crane mounted on a truck or the like (not shown) instead of the overhead crane 9. [Explanation of Symbols]

[0061] A...Crusher, 1...Main body outer casing, 11...Side part of the casing, 11h...Support hole, 15...Front opening, 3...Movable jaw, 7...Support shaft, 5...Hydraulic cylinder, 51...Cylinder section, 52...Piston rod.

Claims

1. In a crusher having a box-shaped outer casing with two metal plate side sections arranged parallel to each other at a predetermined distance on both sides in the width direction and a rectangular front opening formed on the front, a fixed jaw is integrally formed by protruding from the front in the front-rear direction at the lower position of the outer casing when viewed from the side, and a movable jaw protruding from the front opening at the front in the front-rear direction at the upper position of the outer casing and rotating with the fixed jaw, the front end of the cylinder portion of the hydraulic cylinder that drives the movable jaw is pivotally supported on the front side of the movable jaw, and the rear end of the piston rod is pivotally supported on the rear side of the outer casing, The main body outer casing is provided with a support shaft that passes through support holes provided on both sides of the casing near the front opening, the hydraulic cylinder is housed in the front opening of the main body outer casing from the piston rod side, the rear end of the piston rod is pivotally supported on the rear side of the main body outer casing, and the support shaft is inserted through both of the support holes. The rear end of the movable jaw is housed in the front opening of the main body outer casing, and the rear end of the movable jaw is pivotally supported between the two side surfaces of the main body outer casing. The movable jaw is lifted and rotated by a lifting machine, with the pivot point between the movable jaw and the main body outer casing serving as the pivot point of the movable jaw, and the front side of the movable jaw is aligned with the front end of the cylinder portion of the hydraulic cylinder and pivotally supported. A method for assembling a crusher, characterized in that the support shaft is removed from both of the support holes.

2. A method for assembling a crusher according to claim 1, characterized in that a magnetic plate is provided at the lower end of the outer casing of the main body.

3. In a crusher having a box-shaped outer casing with two metal plate side sections arranged parallel to each other at a predetermined distance on both sides in the width direction and a rectangular front opening formed on the front, a fixed jaw is integrally formed by protruding from the front in the front-rear direction at the lower position of the outer casing when viewed from the side, and a movable jaw protruding from the front opening at the front in the front-rear direction at the upper position of the outer casing and rotating with the fixed jaw, the front end of the cylinder portion of the hydraulic cylinder that drives the movable jaw is pivotally supported on the front side of the movable jaw, and the rear end of the piston rod is pivotally supported on the rear side of the outer casing, The main body outer casing is provided with support shafts that pass through support holes located on both sides of the casing near the front opening, and the movable jaw is set to its maximum open position, with the support shafts inserted through both support holes, The pivot between the front end of the cylinder portion of the hydraulic cylinder and the front side of the movable jaw is released, separating the movable jaw and the hydraulic cylinder, and the cylinder portion of the hydraulic cylinder is placed on the support shaft. A method for disassembling a crusher, characterized by using a lifting machine to suspend and lower the movable jaw with the pivot point between it and the main body outer casing as the pivot point to close it, releasing the pivot between the main body outer casing and the movable jaw to separate them, releasing the pivot between the main body outer casing and the hydraulic cylinder to separate them, and removing the support shaft from the support hole.

4. A method for disassembling a crusher according to claim 1, characterized in that a magnetic plate is provided at the lower end of the outer casing of the main body.

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