Method of using electro-hydraulic polyp-type grab bucket and electro-hydraulic poly-type grab bucket used therein

Abstract

To provide an electro-hydraulic polyp-type grab bucket capable of efficiently securing a large amount of grabbing granular handling articles processed into chips or pellets, efficiently grabbing them, and smoothly performing an operation during grabbing.SOLUTION: A scraping plate SP constituting a shell SL of an electro-hydraulic polyp-type grab bucket having a plurality of wide shells SL for transporting granular handling articles is attached to the outside of a shell arm SA which is a framework of the shell SL, so that a bulge dimension BD of the shell SL is 60% or more of an insertion dimension ID of the shell SL.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an electric-hydraulic polyp-type grab bucket that can efficiently grasp granular handled objects processed into chip-like or pellet-like shapes.

Background Art

[0002] In recent years, with the need to reduce carbon dioxide emissions, biomass power generation facilities have been constructed everywhere, and a bucket crane is required to efficiently crane wood chips, which are biomass fuels. There has been a demand for a grab bucket dedicated to handling granular handled objects processed into chip-like or pellet-like shapes, such as wood chips, used for this purpose.

[0003] By the way, there is a waste incineration plant as a facility that performs operations similar to biomass power generation facilities, and there is an electric-hydraulic polyp-type grab bucket that is widely used as a grab bucket for a crane for charging a waste incinerator hopper (see, for example, Patent Documents 1 to 3). This electric-hydraulic polyp-type grab bucket has a shape in which the claws open widely in the radial direction when opened. Due to this shape, the stability when the grab bucket lands is good, the grasping operation is stable, and a wide range can be scraped together during grasping, so that it has the characteristic of being able to secure a large grasping amount.

[0004] The present invention intends to provide an electric-hydraulic polyp-type grab bucket that can efficiently grasp granular handled objects processed into chip-like or pellet-like shapes while taking advantage of the characteristics of this electric-hydraulic polyp-type grab bucket.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

SUMMARY OF THE INVENTION

PROBLEMS TO BE SOLVED BY THE INVENTION

[0006] By the way, an electro-hydraulic polyp-type grab bucket is characterized in that the volume when the grab bucket is opened is large. In a general-purpose electro-hydraulic polyp-type grab bucket, the volume when opened is about three times the volume when closed, and a large amount of materials to be handled can be held in the shell while compressing a wide range of materials to be handled. However, when trying to grasp materials to be handled that are not compressed, such as wood chips, the movement to compress them becomes a resistance, and the grasping stops halfway, and it is necessary to grasp while the materials to be handled spill.

[0007] Furthermore, granular materials to be handled processed into chips or pellets, such as wood chips, are granular and smooth, so the materials to be handled do not get entangled like garbage. If there is a gap between the shells when grasped, the grasped materials to be handled will spill, so a wide scraping plate that does not allow a gap between the shells is required. However, a wide scraping plate has a large resistance when inserted into the accumulated materials to be handled, resulting in a weak insertion force, and there are also strength problems due to widening the scraping plate.

[0008] In view of these problems, the present invention provides an electro-hydraulic polyp-type grab bucket that can ensure a large grasping amount and efficiently grasp granular materials to be handled processed into chips or pellets, and can smooth the operation during grasping. Usage method The first object is to provide such a grab bucket.

[0009] Another object of the present invention is to provide an electro-hydraulic polyp-type grab bucket that can reduce the resistance when inserting the scraping plate into the accumulated materials to be handled and ensure the strength of the wide scraping plate.

MEANS FOR SOLVING THE PROBLEMS

[0010] In order to achieve the above first object, The usage method of the electric-hydraulic polyp-type grab bucket of the present invention comprises a plurality of shells having a structure in which a scraping plate is attached to the outside of the shell arms serving as a framework, and the swelling dimension (BD) of the shell is 60% or more of the insertion dimension (ID) of the shell. It is a usage method of an electric-hydraulic polyp-type grab bucket for transporting granular handling materials, and the shell is inserted into the deposited handling materials in an open state, so that the lower surface of the body that supports the shell arms to be openable and closable is placed on the upper surface of the deposited handling materials. After storing the handling materials with a cut volume (CC) in the shell, the shell is closed so as to hold the handling materials with a grasping volume (GC) in the shell SL. Here, the "swelling dimension (BD) of the shell" means the vertical length dimension of the portion located above the lower surface of the shell body in a state where the shell of the polyp-type grab bucket is inserted into the deposited handling materials in an open state so that the lower surface of the body that supports the shell arms to be openable and closable is placed on the upper surface of the deposited handling materials. The "insertion dimension (ID) of the shell" means the vertical length dimension of the portion located below the lower surface of the shell body in the same state. In this case, the ratio of the cut volume (CC) to the grasping volume (GC) can be 2:1.

[0011] Also, to achieve the second object above, The electro-hydraulic polyp-type grab bucket of the present invention A structure in which a scraping plate is attached to the shell arms serving as a framework comprises a plurality of , in an open state, the shell is inserted into the deposited handling materials, so that the lower surface of the body that supports the shell arms to be openable and closable is placed on the upper surface of the deposited handling materials, for transporting granular handling materials an electro-hydraulic polyp-type grab bucket, wherein the Scrape raking plate is She structured to be attached to the outside of the arm, Do and the bulging dimension of the shell (BD) is made to be 60% or more of the insertion dimension of the shell (ID) in this way , and the scraping plate constituting the shell A reinforcing member made of equilateral angle steel is provided over the entire outer width of the shell in a direction perpendicular to the direction in which the shell is inserted into the deposited handling materials which is characterized. Here, the "swelling dimension (BD) of the shell" means the vertical length dimension of the portion located above the lower surface of the shell body in a state where the shell of the polyp-type grab bucket is inserted into the deposited handling materials in an open state so that the lower surface of the body that supports the shell arms to be openable and closable is placed on the upper surface of the deposited handling materials. The "insertion dimension (ID) of the shell" means the vertical length dimension of the portion located below the lower surface of the shell body in the same state.

[0012] In this case, a wear member can be provided on the outside of the raking plate constituting the shell, parallel to the direction in which the shell is inserted into the handled material on which the shell is deposited. This wear member can prevent the wear member from being worn by rubbing against the wall or floor surface when gripping near the wall body or when gripping a portion where the deposition amount of the sediment on the floor surface is small, and prevent the raking plate from rubbing against the wall or floor surface and wearing.

Advantages of the Invention

[0013] According to the electro-hydraulic polyp-type grab bucket of the present invention Usage method it is possible to obtain a large gripping amount and smooth operation for granular handled materials processed into chip-like or pellet-like forms such as wood chips, and improve the conveying efficiency of the handled materials. Furthermore, according to the electro-hydraulic polyp-type grab bucket of the present invention, a reinforcing member is provided on the outside of the wide scraping plate adopted to prevent the handled object held from falling through the gap between the shells in a direction orthogonal to the direction of piercing into the deposited handled object. By giving this reinforcing member the role of peeling the close contact state between the scraping plate and the deposited handled object, the resistance when inserting the wide scraping plate into the deposited handled object can be reduced, and the strength of the wide scraping plate can be ensured.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Embodiments for Carrying Out the Invention

[0015] Hereinafter, the electric-hydraulic polyp-type grab bucket of the present invention And its usage will be described based on embodiments with reference to the drawings.

[0016] FIG. 1 shows an embodiment of the electric-hydraulic polyp-type grab bucket of the present invention. And its usage of the present invention. This electric-hydraulic polyp-type grab bucket has devised the shape of the shell SL so as to efficiently grasp granular handled materials processed into chip-like or pellet-like forms such as wood chips. On the other hand, FIG. 2 shows a general-purpose electric-hydraulic polyp-type grab bucket used for grasping garbage and the like.

[0017] Both the electric-hydraulic polyp-type grab bucket in FIG. 1 and the general-purpose electric-hydraulic polyp-type grab bucket in FIG. 2 have a plurality of shells SL attached from the body TK portion, and a pair of hydraulic cylinders OC are attached to each shell SL. The hydraulic cylinder OC is operated by a hydraulic unit housed inside the body TK, and the shell SL is opened and closed. Normally, 4 to 6 or more shells SL are attached, and the number of shells SL is increased as the volume of the grab bucket increases. When the shell SL is fully opened, it is a characteristic of the electric-hydraulic polyp-type grab bucket that the shell SL opens widely in the radial direction. From its widely opened shape 、 when the grab bucket wear is placed on the floor, it is stable and can pick up handled materials from a wide range in the radial direction.scrape It is a common feature of electric-hydraulic polyp-type grab buckets to gather and collect a large number of handling materials and store them inside the shell for grasping.

[0018] The electric-hydraulic polyp-type grab bucket of the present invention in Fig. 1 has a structure in which there is no gap between the shells SL when grasping so as not to drop the grasped granular handling materials, and a wide scraping plate SP is used. The general-purpose electric-hydraulic polyp-type grab bucket in Fig. 2 is targeted at handling materials such as garbage. When it is opened, the shell has a gun-like shape, which can easily pierce into handling materials such as garbage. When grasping, there is a gap between the shells SL, but the grasped handling materials are intertwined and compressed with each other and fit into the shell SL, and a large amount of handling materials can be grasped without falling out from the gap between the shells SL.

[0019] Fig. 3(1) shows the state where the general-purpose electric-hydraulic polyp-type grab bucket is opened. Claws TA made of hard metal are attached to the tips of each shell SL. By piercing a plurality of gun-shaped and pointed shells SL onto the handling materials, the lower surface of the body TK lands on the upper surface of the handling materials deposited. At this time, the shell SL is inserted into the deposited handling materials by an insertion dimension ID. As a result, the handling materials with a volume of the cut-off volume CC fit into the shell SL, the hydraulic cylinder OC is extended to push the shell arm SA, and the shell SL is closed. A scraping plate SP is stretched inside the shell arm SA that serves as a framework of the shell SL. While the shell arm SA and the reinforcing member RP protruding laterally from the shell arm SA support the scraping plate SP from the rear, the scraping plate SP scrapes and gathers the handling materials.

[0020] Fig. 3(2) shows the state where the general-purpose electric-hydraulic polyp-type grab bucket is closed. The volume of the handling materials held by the shell SL at this time is the grasping volume GC. It is a feature of a general-purpose electro-hydraulic polyp-type grab bucket that the cut-out volume CC shown in Fig. 3(1) is approximately three times the volume of the grasping volume GC, and it is possible to compress and accommodate a large volume of handled materials in the shell SL and grasp them. Here, the handled materials that cannot be completely compressed and accommodated in the shell SL are appropriately discharged from the gap between the shells SL, suppressing the situation where the grasping is excessive and the operation stops during the grasping operation, and smooth grasping can be obtained.

[0021] On the other hand, the electro-hydraulic polyp-type grab bucket of the present invention inserts a wide shell SL provided so that the handled materials do not spill out in the closed state into the deposited handled materials in the state of Fig. 4(1), so that the lower surface of the body TK rests on the upper surface of the deposited handled materials. At this time, the shell SL is inserted into the deposited handled materials by the insertion dimension ID. As a result, the handled materials with the volume of the cut-out volume CC fit into the shell SL, the hydraulic cylinder OC is extended to push in the shell arm SA, and the shell SL is closed. When transitioning from this state to the closed state of Fig. 4(2), the wide scraping plate SP tries to hold the granular handled materials such as wood chips inside by closing the shell SL. However, since the granular handled materials such as wood chips do not compress and the gap between the wide shells SL is small, making it difficult to discharge the handled materials that cannot be grasped, this becomes a resistance. Due to this resistance, if grasping is performed with a grab bucket that simply widens the scraping plate SP of a general-purpose electro-hydraulic polyp-type grab bucket, the hydraulic cylinder OC that pushes in the shell arm SA cannot overcome the resistance and stops halfway, and smooth grasping cannot be achieved.

[0022] Therefore, the ratio of the swelling dimension BD to the insertion dimension ID of the shell SL is about 1:0.4 for a general-purpose electro-hydraulic polyp-type grab bucket, while for the electro-hydraulic polyp-type grab bucket of the present invention, it is 1:0.6 or more, and a shell SL structure that swells greatly is adopted. structure. In addition, while a general-purpose electro-hydraulic polyp-type grab bucket has a scraping plate SP stretched inside the shell arm SA, in the electro-hydraulic polyp-type grab bucket of the present invention, the scraping plate SP is stretched outside the shell arm SA. By greatly expanding the swelling dimension of this shell SL and attaching the scraping plate SP outside the shell arm SA, the ratio of the grasping volume GC to the cutting volume CC is about 3:1 for a general-purpose electro-hydraulic polyp-type grab bucket, whereas the electro-hydraulic polyp-type grab bucket of the present invention has suppressed it to about 2:1. This relieves the force that attempts to compress the handled material when transitioning from the open state to the closed state, prevents the phenomenon that the operation stops during the grasping operation, enables a smooth grasping operation, and enables grasping of a large amount of granular handled material.

[0023] FIG. 5(1) is a view of the wide shell SL of the electro-hydraulic polyp-type grab bucket of the present invention as seen from the inside on the grasping side, FIG. 5(2) is a side view, and FIG. 5(3) is a view as seen from the outside on the opposite side of the grasping side. When reinforcing the scraping plate SP of the wide shell SL of the electro-hydraulic polyp-type grab bucket of the present invention, as shown in FIG. 5(1), when a reinforcing member is attached inside the scraping plate SP, the reinforcing member RP gets caught when releasing the grasped handled material and does not fall smoothly. Therefore, as shown in FIG. 5(3), a reinforcing member RP is provided outside the scraping plate SP in a direction orthogonal to the insertion direction of the shell SL. For the reinforcing member RP, in this embodiment, an equilateral angle steel is used and is provided at two positions of the scraping plate SP over the entire width of the scraping plate SP. This reinforcing member RP peels off the close contact state between the handled material and the scraping plate SP when inserting into the handled material piled up with the wide shell SL, reduces the frictional resistance between the handled material and the scraping plate SP, smoothens the operation when inserting into the handled material piled up by opening the electro-hydraulic polyp-type grab bucket of the present invention, and ensures the strength of the wide scraping plate SP.

[0024] Also, as shown in Fig. 5(3), a wear member AR is provided outside the scraping plate SP in parallel with the insertion direction of the shell SL. In this embodiment, the wear member AR is attached by welding a bar steel such as round steel. When the wear member AR wears due to long-term use, build-up welding repair can be performed on the worn part of the wear member AR to increase the thickness, so that it can continue to be used. When grasping near the wall or when grasping a part where the amount of sediment deposited on the floor surface is small, the wear member AR rubs against the wall or the floor surface, causing the wear member AR to wear, thereby preventing the scraping plate SP from rubbing against the wall or the floor surface and wearing.

[0025] As described above, the electric-hydraulic polyp-type grab bucket of the present invention And its usage has been described based on its embodiments. However, the present invention is not limited to the configurations described in the above embodiments, and its configuration can be appropriately changed without departing from the spirit of the invention.

Industrial Applicability

[0026] The electric-hydraulic polyp-type grab bucket of the present invention And its usage can ensure a large grasping amount when grasping granular handled materials processed into chip-like or pellet-like shapes, can grasp efficiently, and can smooth the operation during grasping. Therefore, it is effectively utilized industrially as an optimal grab bucket for the crane transportation of wood chips, which are the fuel for biomass power generation with booming construction due to carbon dioxide emissions reduction. In addition, it can be widely used for the crane transportation of granular handled materials processed into chip-like or pellet-like shapes.

Explanation of Reference Numerals

[0027] TK Barrel OC Hydraulic Cylinder SL Shell SA Shell Arm SP Scraping Plate TA Claw RP Reinforcing Member AR Wear Part CC Cutting Volume GC Gripping Volume ID Insertion Dimension BD Bulging Dimension

Claims

1. This is an electro-hydraulic polyp type grab bucket equipped with a plurality of wide shells for transporting granular materials, characterized in that the scraping plates constituting the shells of the grab bucket are attached to the outside of the shell arms which are the framework of the shells, and the bulge dimension of the shells is set to 60% or more of the insertion dimension of the shells.

2. The electrohydraulic poly-lip type grab bucket according to claim 1, characterized in that a reinforcing member is provided on the outside of the scraper plate constituting the shell in a direction perpendicular to the direction in which the shell is inserted into the piled up materials to be handled.

3. 3. The electrohydraulic polylip type grab bucket according to claim 1 or 2, characterized in that a wear member is provided on the outside of the scraper plate constituting the shell, parallel to the direction in which the shell is inserted into the piled up materials to be handled.

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