JPH04127368U - Small concrete crusher for power shovels - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a concrete crusher that can increase the efficiency of secondary crushing of concrete blocks of demolished concrete structures. [Structure] A small concrete crusher in which the base end of the lower jaw 1 is attached to the tip side of the intermediate boom of a power excavator, and the upper jaw is rotatably supported on the lower jaw 1. Four crushing blades 14 are provided in a fork-like manner with gaps 15 parallel to the opening/closing direction of the upper claw at the tip 10b of the upper claw, and projections 1 that alternately engage with projections provided on the upper claw are provided.
3 is provided on all of the crushing blades 14.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is designed to remove concrete from concrete structures that have been demolished using a concrete crusher. A compact concrete compact for power shovels used to crush lumps into smaller pieces. Regarding crushers.

0002

[Conventional technology]

Conventional compact concrete crushers for power shovels have many protrusions. In contrast to the upper claw, the crushing blade of the lower claw has protrusions on both ends or only on the central part of the crushing blade. It was set up. In addition, the upper surfaces of the crushing blades are connected by a flat plate, and the gap between the crushing blades is was decreasing.

0003

[Problem that the idea aims to solve]

However, with this conventional compact concrete crusher for power shovels, Since there are many flat parts on the crushing blade of the claw, the concrete mass grabbed is mainly due to the protrusion of the upper claw. There was a problem in that the material was crushed only by the grinder, reducing the crushing efficiency. The present invention was devised to solve such conventional problems, and its purpose is to The aim is to increase the crushing efficiency by having the crushing blade of the lower jaw perform the crushing action with the same efficiency as the upper jaw. We decided to provide a small concrete crusher for power shovels that can be lifted up. be.

0004

[Means to solve the problem]

As a means to achieve the above object, the concrete for power shovels of the present invention is provided. In small crushers, the tip of the intermediate boom and the hydraulic cylinder of the power excavator are a lower claw whose base end is connectable to the tip end of the piston rod; It is pivotably supported on the tip side of the lower claw so that it can be opened and closed, and is opened and closed by a hydraulic cylinder provided on the lower claw. A compact concrete crusher for use in a power shovel, which is equipped with an upper jaw, wherein the lower jaw is A plurality of crushing blades are provided at the tip of the fork, each with a gap parallel to the opening/closing direction of the upper claw. The crushing blade has protrusions that alternately engage with the protrusions provided on the upper claw. The configuration is provided in all of the.

[0005]

[Effect]

The compact concrete crusher for power shovels of this invention has a protrusion on the upper jaw. All of the crushing blades of the lower claw are equipped with protrusions that alternately engage with the protrusions, so the gripped object is Both sides of the concrete block are pressed only by the protrusions. Also, between the crushing blades Since there is a gap in the ridge, the crushed concrete mass remains stuck around the protrusion. Never.

[0006]

【Example】

Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1 is a side view and diagram showing a small concrete crusher for power shovels according to this embodiment. 2 is a front view of the same as above, FIG. 3 is a rear view of the upper claw of same as above, and FIG. 4 is a front view of the lower claw of same as above. 5 is an explanatory diagram showing the state of use. The compact concrete crusher A for power shovels of this embodiment has a lower jaw 1 and an upper jaw 2. , and an opening/closing hydraulic cylinder 3 are the main components.

[0007] The lower claw 1 is attached to the intermediate boom 40 of the power shovel 4, and is connected to the upper claw 2. A pair of left and right plate-shaped side plates 10, 1 serve as mounting parts for the closing hydraulic cylinder 3. 0, and the tip end of the intermediate boom 40 is attached to the base ends 10a, 10a of the side plates 10, 10. 41, and the piston rod tip end side 43 of the hydraulic cylinder 42 on the intermediate boom 40 Pivot holes 11 and 12 are provided for rotatably connecting them to each other. Four protrusions 13 are provided at the tips 10b, 10b of the side plates 10, 10, respectively. A girder-shaped crushing blade 14 is fixed, and two crushing blades 14 of the same shape are attached to the side plate 10. , 10 with the same gap 15 maintained between them, and each crushing blade 14 is reinforced with a vertical plate 16. By firmly connecting the crushing blade 14 to the tip 10b of the lower claw 1 in a fork shape. I'm being kicked. In the figure, 11a and 12a are supports attached to the pivot holes 11 and 12 of the lower claw 1. It is the axis.

[0008] The upper claw 2 serves as a movable blade, and the base end is a support shaft 20 that connects the lower claw 1. The crushing blade 1 is rotatably supported on the upper part of the crushing blade 14, and the crushing blade 1 is provided on a surface facing the crushing blade 14. A large number of protrusions 21 are provided at positions alternately arranged with the protrusions 13 of 4. Further, reinforcing bar cutting blades 17 and 22 are provided near the shaft supports of the lower claw 1 and the upper claw 2. It is being

[0009] The opening/closing hydraulic cylinder 3 is for opening and closing the upper claw 2, and is for opening and closing the upper claw 2. A cylinder 30 is rotatably supported by a support shaft 31 at a position above the lower claw 1, and the piston rod The tip end side of the pad 32 is rotatably supported by a support shaft 33 at the middle part of the front side of the upper claw 2. Ru. 18 in the figure connects the piston rod end side 43 of the hydraulic cylinder 42 and the pivot hole 12. 14 is a guide link that connects the link 18 and the intermediate boom 40. be.

0010 Next, the operation of the embodiment will be explained. When hydraulic pressure is applied to the opening/closing hydraulic cylinder 3, the upper claw 2 is pushed at the middle part The lower claw 1 rotates around the support shaft 20 toward the closing side with respect to the lower claw 1. In this case, lower claw 1 and upper claw The concrete lump grasped by 2 is crushed by the protrusion 13 of the crushing blade 14 and the protrusion 21 of the upper claw. It is pressed and receives local pressure from both sides, causing it to fracture from both sides. Also , the crushed concrete mass has protrusions because there is a gap 15 between the crushing blades 14. It does not stick around 13 and falls.

[0011] As explained above, according to this embodiment, the protrusion 21 provided on the upper claw 2 and the All four crushing blades 14 of the lower claw 1 are provided with protrusions 13 that engage with each other. Therefore, the gripped concrete block has only protrusions 13 and 21 on both sides, and only local force is applied. The crushing efficiency of the small crusher can be increased.

0012 In addition, since a gap 15 is provided between the crushing blades 14, the crushed pieces The concrete lumps do not stick to fill the protrusions 13, increasing crushing efficiency. be able to.

[0013] Although the embodiment of the present invention has been explained above, the specific configuration of the present invention is explained in this embodiment. There are no limitations, and even if there are design changes that do not deviate from the gist of the invention. Included in this proposal. For example, in the embodiment, four crushing blades 14 are provided, but the number of crushing blades 14 installed is Can be set arbitrarily. Moreover, the mounting shape etc. are also arbitrary.

[0014] In addition, in the embodiment, four protrusions 13 are provided on the plate-shaped thing, but the protrusions 13 are It may be provided separately from the plate-shaped one, and its shape is also arbitrary.

[0015]

[Effect of the idea]

As explained above, the compact concrete crusher for power shovels of this invention In some cases, the protrusions on the upper claw and the protrusions that alternately engage all of the crushing blades on the lower claw. Because of this, the grabbed concrete block is subject to local forces on both sides due to only the protrusions. The crushing efficiency can be increased because the crushing efficiency is increased.

[0016] In addition, since there is a gap between the crushing blades, the crushed concrete The lumps do not stick to fill the protrusions, and the protrusions can always be used effectively. Effects such as being able to increase crushing efficiency can be obtained.

[Brief explanation of drawings]

FIG. 1 is a side view showing a compact concrete crusher for a power shovel according to an embodiment of the present invention.

FIG. 2 is a front view showing the small-sized concrete crusher for a power shovel same as above.

FIG. 3 is a rear view showing the upper claw of the same as above.

FIG. 4 is a front view showing the lower claw of the same as above.

FIG. 5 is an explanatory diagram showing the usage state of the same as above.

[Explanation of symbols]

A Small concrete crusher for power shovels 1 lower nail 2 Upper nail 3 Hydraulic cylinder for opening/closing 4 Power shovel 10 Side plate (lower claw) 10a Proximal end 10b Tip 11 Pivot hole 12 Pivot hole 13 Protrusion of crushing blade 14 Crushing blade 15 Gap 20 Support shaft 21 Protrusion 41 Tip of intermediate boom 43 Piston rod tip side 73 Tip side of piston rod

Claims (1)

[Scope of utility model registration request] 1. A lower claw whose proximal end is connectable to the distal end of an intermediate boom in a power excavator and the distal end of a piston rod of a hydraulic cylinder, and a shaft that can be opened and closed on the distal end of the lower claw. A small concrete crusher for a power shovel equipped with an upper jaw that is supported and opened and closed by a hydraulic cylinder provided on the lower jaw, wherein a plurality of crushing blades are provided at the tip of the lower jaw, respectively in the opening and closing direction of the upper jaw. A compact concrete crusher for a power shovel, characterized in that all of the crushing blades are provided with protrusions that are provided in a fork shape with parallel gaps and that alternately engage with protrusions provided on the upper claw.