Crusher as attachment

Abstract

PURPOSE: To provide an invention that crushes steel bar concrete, further cracks even after the concrete becomes concrete mass, prevents a hydraulic cylinder from being damaged by cut steel bar as concrete mass, and prevents damage of an outside hydraulic hose when being housed.CONSTITUTION: A crusher as an attachment is such that: a lower jaw part 2 and an upper jaw part 3 are formed in a body outer casing 1; concrete mass can be crushed by oscillation of the upper jaw part 3; a cylinder part 51 of a hydraulically-driven hydraulic cylinder 5 is arranged at the tip side of the upper jaw part 3, and a piston rod 52 is arranged at the depth side of the body outer casing 1, and in the situation, two internally mounted inside hydraulic hoses 6, 6 form a curved perpendicular shape from the tip of the piston rod 52 and are housed in the body outer casing 1; two outside hydraulic hoses 7, 7 are connected via a branch board 18 in the body outer casing 1; and the other ends of both outside hydraulic hoses 7, 7 are inserted into the inside of the body outer casing 1 from a hole part disposed in the upper face corner part of the body outer casing 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a crusher as an attachment that prevents hydraulic cylinders from being damaged by cut rebar that has become reinforced concrete blocks when the reinforced concrete blocks are crushed and further crushed (broken into smaller pieces) after they have been crushed, and also prevents damage to the outer hydraulic hose when the concrete is stored. [Background technology]

[0002] Conventionally, there have been various mounting structures for the hydraulic cylinder that rotates the movable blade. In general, the cylinder part of the hydraulic cylinder is supported at the rear of the machine body, and the tip of the cylinder rod is supported at the movable blade side. In this case, the reinforced concrete is crushed, and then the reinforced concrete block is broken into appropriate sizes and processed as concrete crushed material rather than industrial waste. During this breaking work, as shown in Figure 7, the reinforced concrete block has many rebars that are irregular and point in various directions.

[0003] In this case, during the small-cutting operation, the tip of the rebar often enters the inside of the crusher and damages the piston rod of the hydraulic cylinder. For this reason, there are examples in which a cover is provided on the piston rod to prevent this. There are also examples in which such a configuration is used to prevent the rebar from entering during the small-cutting operation. Furthermore, there have been cases in which the internal hydraulic hose has also been damaged.

[0004] Furthermore, in Patent Document 1, the direction of the hydraulic cylinder is reversed, with the piston rod located at the rear of the main body and the cylinder portion located in front of the movable jaw. However, since this is the only configuration, it is unclear whether damage to the piston rod can be reliably prevented.

[0005] Such a crusher is used by being attached to the end of the arm of a hydraulic excavator as an attachment, and when not in use, it is removed from the end of the arm and stored in an appropriate location. In this case, the external hydraulic hose attached to the crusher is generally left hanging loose, as shown in Figures 8(A) to 8(D), and is often pinched between the crusher body and the hose, resulting in damage. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 7-204526 Summary of the Invention [Problem to be solved by the invention]

[0007] For this reason, the problem (technical problem or objective, etc.) that the present invention aims to solve is to provide a means to protect the piston rod of the hydraulic cylinder and the internal hydraulic hose when the crusher is attached to a hydraulic excavator for small-cutting work, even if the crusher is used by being attached as an attachment, and to protect the external hydraulic hose when the crusher is removed from the hydraulic excavator and stored. [Means for solving the problem]

[0008] Therefore, the inventors have conducted intensive research to solve the above problems, and as a result, have discovered the invention of claim 1, which comprises a lower jaw portion protruding forward from one lower side of a box-shaped main body outer casing, and an upper jaw portion protruding forward from one upper side of the main body outer casing and performing a swinging motion together with the lower jaw portion, wherein the cylinder portion of a hydraulic cylinder for driving the upper jaw portion is journaled so that it is located on the tip side of the upper jaw portion and the piston rod is located on the inner side of the main body outer casing, and two internal hydraulic hoses extending from the tip of the piston rod of the hydraulic cylinder are curved vertically and are stored within the main body outer casing, The above problem was solved by providing a crusher as an attachment characterized in that the attachment is connected to a branching board inside the outer casing of the main body, and the distance between the two holder portions of the bases of the two internal hydraulic hoses connected to the piston rod ends of the hydraulic cylinder is formed so as to be slightly smaller than the diameter of the rod portions of the hydraulic cylinder, and one end of each of two external hydraulic hoses from the branching board is connected to the branching board, the entirety of the external hydraulic hoses is arranged outside the main body, and the other end of the external hydraulic hose is configured so as to be insertable into a hole provided in a front corner of the outer casing of the main body.

[0009] The invention of claim 2 solves the above problem by providing a crusher as an attachment, as described in claim 1, characterized in that a magnetic disk is provided at the lower end of the main body outer casing. Effect of the Invention

[0010] The invention of claim 1 has the excellent effect of almost completely eliminating damage to the hydraulic cylinder, particularly during the work of breaking reinforced concrete blocks into appropriate sizes so that they are no longer industrial waste (work as shown in FIG. 7), and of preventing damage to the external hydraulic hose exposed to the outside by allowing the external hydraulic hose to be securely stored when the attachment is not used for breaking. In particular, the external hydraulic hose can be properly stored when the crusher attachment is removed from the hydraulic excavator, and damage thereto can be reliably prevented. In the invention of claim 2, the breaking work is also performed in a crushing device having a magnetic disk at the bottom end of the main body outer casing, and the same effect as claim 1 is achieved. [Brief description of the drawings]

[0011] [Figure 1] 1A is a cross-sectional view of the present invention in a maximally open state, and FIG. 1B is a cross-sectional view of the present invention in a closed state, showing the operation of the present invention. [Diagram 2] 1A is a vertical cross-sectional perspective view of the present invention with approximately half of the device cut away, and FIG. 1B is a cross-sectional view of the hydraulic cylinder portion. [Diagram 3] 1A is a perspective view of the present invention as seen from the front side, and FIG. 1B is a diagram showing the relationship between the hydraulic cylinder portion and the internal hydraulic hose. [Figure 4] 1A is a perspective view showing the state immediately after the present invention has been removed from the hydraulic excavator, and FIG. 1B is a perspective view showing the state immediately before the external hydraulic hose is stored in the outer casing main body. FIG. [Diagram 5] FIG. 1 shows the present invention removed from a hydraulic excavator, and (A) is a perspective view with a portion of the side plate of the main body outer casing with the tip end of the external hydraulic hose stored in the outer casing main body removed, and (B) is a perspective view of the branch board portion of (A). [Figure 6] 1A is a perspective view of the crusher with the tip end of the external hydraulic hose stored in the outer casing body, as seen from the front, showing the present invention removed from the hydraulic excavator, and FIG. 1B is a longitudinal side view of FIG. 1A. [Figure 7]FIG. 11 is another embodiment of the present invention in which an electromagnet is provided below the crusher, where (A) is a perspective view of the crusher as seen from below, and (B) is a vertical cross-sectional side view of (A). [Figure 8] These are conventional techniques. (A) is a diagram showing how a crusher attachment is attached to the tip of a hydraulic excavator to break up many reinforced concrete blocks into smaller pieces. (B) is an enlarged diagram of the main parts of a concrete block with reinforcing bars being broken up into smaller pieces. (C) is a perspective view of an example of a reinforced concrete block. [Figure 9] (A), (B), (C), and (D) are diagrams of the prior art in which a crusher attachment has been removed from a hydraulic excavator and appropriately stored. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, the crusher A for small pieces of material in the present invention mainly comprises a crusher housing 1, a fixed jaw 2, a movable jaw 3, cutting blades 4a and 4b, and a hydraulic cylinder 5. The crusher A is mounted as an attachment to the tip of the arm of a construction vehicle 9 such as a hydraulic excavator.

[0013] In the small-cut crusher A, a front-rear direction and a width direction are set. The front-rear direction is the left-right direction between the crusher outer casing 1 and the fixed jaw 2 when viewed from the side as shown in Fig. 1, and the width direction is a direction perpendicular to the front-rear direction. The up-down direction is a direction approximately perpendicular to the front-rear direction (left-right direction).

[0014] The crusher A has a fixed jaw 2 integrally formed on the lower outer side of a crusher outer casing 1, and a movable jaw 3 opens and closes on the fixed jaw 2 (see Fig. 1(A)). The movable jaw 3 has a rotation base (root) supported on a shaft 16 so as to be rotatable about the shaft of the crusher outer casing 1 (see Figs. 1 and 2(A)).

[0015] The crusher outer casing 1 has two housing side sections 11, 11 made of metal plates arranged in parallel on both sides in the width direction at a predetermined distance, with a housing top section 12 provided on the upper surfaces of both housing side sections 11, 11, a housing back section 13 provided on the rear surfaces of both housing side sections 11, 11, and a housing bottom section 14 provided on the bottom surface of the housing back section 13, which are integrated together by welding to form the housing (see Figures 1 and 2(A)).

[0016] A square front opening 15 is formed in the front of the crusher housing 1. Specifically, the front opening 15 is a space surrounded by the housing side sections 11, 11, the housing top section 12, the housing back section 13, and the housing bottom section 14, that is, an opening that separates the inside and the outside of the crusher housing 1. The movable jaw 3 is configured to protrude from one upper side of the crusher housing 1 to the front side through the front opening 15 and to perform a swinging motion together with the lower jaw 2.

[0017] In other words, the interior and exterior of the crusher outer casing 1 are distinguished by the front opening 15. Inside the crusher outer casing 1, various devices and members such as hydraulic devices are provided. Specifically, the hydraulic cylinder 5, the internal hydraulic hoses 6, 6, and the branching panel 18 are provided (see Figs. 5(A) and (B)). Outside the crusher outer casing 1, external hydraulic hoses 7, 7 are provided.

[0018] The fixed jaw 2 is formed by forming metal plates into a predetermined shape, similar to the crusher housing 1, and welding these together to form a housing. In the description of this invention, the fixed jaw 2 refers to the portion that protrudes forward in the front-rear direction (left-right direction) of the crusher housing 1 from directly below the front opening 15 (see Figs. 1(A) and 2(A)). The crushing surface 2a of the fixed jaw 2 is formed flat and is also provided with holes. The holes correspond to the crushing blades of the movable jaw 2.

[0019] The movable jaw 3 is composed of a movable crushing section 31 and a pivot-side base 32 (see FIG. 1). The pivot-side base 32 of the movable jaw 3 is supported by a support shaft 16 provided inside the crusher outer casing 1, is provided so as to be freely rotatable, and is structured to swing (open and close) on a vertical plane relative to the fixed jaw 2. Then, the concrete blocks are crushed by the crushing blades of the movable crushing section 31 and the crushing work surface 2a.

[0020] The movable jaw 3 is oscillated by a hydraulic device such as a hydraulic cylinder 5 provided inside the crusher housing 1. Specifically, the pivot-side base 32 of the movable jaw 3 is pivoted to the support shaft 16, and the outer end 51X of the cylinder portion 51 of the hydraulic cylinder 5 is pivotally supported 31X at the tip end of the movable jaw 3 (see Figs. 1 and 2(A)).

[0021] The hydraulic cylinder 5 is composed of a cylinder portion 51 and a piston rod 52, and the piston rod 52 is disposed so as to be located on the rear side of the crusher outer casing 1. Specifically, a tip 52X of a rod portion 52a of the piston rod 52 is journaled 16 on both side plate portions on the rear side of the crusher outer casing 1 (see Figs. 1 and 2(A)).

[0022] 2(A) and (B), two rod internal hydraulic paths 521, 522 are provided in the piston rod 52. The rod internal hydraulic path 521 is formed so as to communicate from the tip 52X of the rod portion 52a to the front side of the piston portion 52b. The rod internal hydraulic path 522 is formed so as to communicate from the tip 52X of the rod portion 52a through the piston portion 52b to the inside of the cylinder portion 51.

[0023] Each of the internal hydraulic hoses 6, 6 is composed of a hose main body 61 and holders 62, 62 at both ends. The holder 62 on one side of each of the hose main bodies 61 is configured to communicate from the end of the piston rod 52 to a connection socket 53 at the tip 52X of the piston rod 52 and to the hydraulic passage 521 or 522 in the rod.

[0024] Moreover, the holder portion 62 on the other side of the hose main body portion 61 is connected to a branching board 18 provided in the crusher outer casing 1. At this time, the hose main body portion 61 of the internal hydraulic hose 6 is curved vertically and stored in the main body outer casing. Furthermore, as shown in Figures 3(A) and (B), both internal hydraulic hoses 6, 6 are arranged symmetrically when the attached hydraulic cylinder 6 is viewed in plan (rear) view.

[0025] 5(A) and (B), the internal hydraulic hoses 6, 6 are provided so as to communicate between the hydraulic cylinder 5 and the branching board 18. Specifically, a holder portion 62 at one upper end of the internal hydraulic hose 6 is connected to a connection socket 53 at the tip 52X of the piston rod 52 of the hydraulic cylinder 5, and a holder portion 62 at one lower end of the internal hydraulic hose 6 is connected to a joint portion of the branching board 18, and the internal hydraulic hose 6 is formed so as to have a substantially three-quarters circular shape as viewed from the side of the entire crusher A, and is provided so as to form a vertical surface as viewed from the front (or back) side.

[0026] 3(B) and (C), the interval δ between the holder parts 62, 61 at the base of the internal hydraulic hose 6, 6 connected to the piston rod 52 of the hydraulic cylinder 5 is formed to be slightly smaller than the diameter φ of the rod part 52a of the piston rod 52 of the hydraulic cylinder 5. This has the advantage that even if the tip of the reinforcing bar a tries to enter during crushing of a concrete block containing a reinforcing bar a using the crusher A of the present invention and hits the cylinder part 51, the piston rod 51 and the internal hydraulic hose 6, 6 are not significantly damaged. In addition, the interval δ between the holder parts 62, 61 may be formed to be equal to the diameter φ of the rod part 52a, and even in this case, the effect is substantially the same as when the interval δ is slightly smaller than the diameter φ.

[0027] Each of the external hydraulic hoses 7, 7 is composed of a hose main body 71 and holders 72, 72 at both ends, and the holder 72 at one base end is bent at a substantially right angle and rotatably connected to an end of a connection socket 181 provided on the outside of the housing side portion 11, as shown in Fig. 5(B). The connection socket 181 is connected to the side of the branch panel 18.

[0028] 5(A) and 6, the holder portion 72 on the other side of the external hydraulic hose 7 is configured so as to be able to be inserted into the inside of the crusher outer casing 1 through a hole portion 19 provided in a front portion of the housing upper surface portion 12 of the crusher outer casing 1. Specifically, the other ends of the external hydraulic hoses 7, 7 are configured so as to be inserted into the hole portions 19, 19 symmetrically on the outsides of the housing side portions 11, 11 on both sides of the crusher outer casing 1, respectively.

[0029] Even if the holder portion 72 at the end of the external hydraulic hose 7, 7 and a part of the hose main body portion 71 are inserted through the hole portion 19, they are configured not to get in the way of other members inside the crusher outer casing 1. Setting in this manner is performed only when the crusher A serving as an attachment is removed from the hydraulic excavator. This makes it possible to completely prevent the external hydraulic hose 7 from being pinched or damaged by the crusher A.

[0030] A fixed cutting section 4a is provided on the crushing work surface 2a of the fixed jaw 2, and a movable cutting section 4b is provided on the movable jaw 3 (see FIG. 1). Then, as the movable jaw 3 opens and closes above the fixed jaw 2, the fixed jaw 2 and the movable jaw 3 pinch the concrete block k, while the concrete block k is crushed by the movable-side crushing section 33 provided on the crushing work surface 2a of the movable jaw 3. Then, the fixed cutting section 4a and the movable cutting section 4b cross each other and cut the reinforcing bar k in a shear state (see FIG. 8).

[0031] Also, as shown in Fig. 7, a crusher with an electromagnet may be used, in which a magnetic disk 9 is provided under the outer casing 1 of the crusher body. In this case, the crusher A has the advantage that the reinforcing bars s separated from the reinforced concrete blocks can be bound together at once by magnetic force, making it easy to clean up. [Explanation of symbols]

[0032] 1...main body outer casing, 18...branch board, 2...lower jaw portion, 3...upper jaw portion, 5...hydraulic cylinder, 51: Cylinder portion, 52: Piston rod, 52a: Rod portion, φ: Diameter, 6... inner hydraulic hose, 62... holder portion, δ... interval, 19... hole portion, 7... outer hydraulic hose, 9...Magnetic disc.

Claims

1. A lower jaw is formed protruding forward from one lower side of a box-shaped main body casing, and an upper jaw is protruding forward from one upper side of the main body casing and performs a swinging motion together with the lower jaw. A hydraulic cylinder for driving the upper jaw is supported so that a cylinder portion is located on the tip side of the upper jaw and a piston rod is located on the back side of the main body casing. The two internal hydraulic hoses extending from the tip ends of the piston rods of the hydraulic cylinders are stored in the main body outer casing in a curved vertical shape and are connected to a branching board in the main body outer casing, and the distance between the two holder portions of the bases of the two internal hydraulic hoses connected to the piston rod ends of the hydraulic cylinders is formed to be slightly smaller than the diameter of the rod portions of the hydraulic cylinders, A crusher as an attachment, characterized in that one end of each of two external hydraulic hoses from the branching panel location is connected, the entire external hydraulic hoses are arranged outside the main body, and the other end of each external hydraulic hose is configured to be insertable into a hole provided in a front corner of the main body outer casing.

2. 2. The crusher as an attachment according to claim 1, further comprising a magnet plate provided at a lower end of said main body housing.

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