JPH0352843Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a grab bucket used in dredging work underwater and bulk material work on land.

[Conventional technology]

Grab buckets have traditionally been used for dredging and bulk material work, but because the top of the conventional grab was open, it generated pollution such as seawater during dredging work, and had the disadvantage that it could generate dust.

As a grab bucket to overcome this drawback, there was a closed type grab bucket in which the entire grab bucket was sealed.

Some of these closed-type gloves had a structure in which the curved surface of the shell was an arc and the shell frame was sealed with a vane seal, and others had a structure in which a fixed cover was attached to the upper surface of the shell.

[Problem that the invention attempts to solve]

However, since the closed type grab bucket according to the conventional example has a high degree of sealing, its structure is complicated, and the attached parts are large compared to the size of the grab bucket, so it is difficult to grasp the bag compared to the overall size of the grab bucket. The problem was that the lifting capacity was low. This has become an important problem because when attempting to increase the capacity of the grab bucket, the overall weight increases, which is also constrained by the crane capacity.

When submerging the grab bucket in a specified place underwater, since the upper part of the shell is sealed, there is a problem that it may take a long time to sink due to water resistance, or it may not sink in the specified place. Ta.

Furthermore, conventional grab buckets are generally not equipped with a device to measure the amount lifted, and especially in dredging work, this cannot be determined until the grab bucket is closed and pulled up to sea, which may result in wasted work. There was a problem that there was.

The present invention was developed in view of these circumstances, and it has a simple structure that has low water resistance when submerged in water, and a measurement method that allows the user to know the amount of objects grabbed by the closed grab bucket. It is an object of the present invention to provide a closed type grab bucket to which means are also attached.

[Means for solving problems]

The closed type grab bucket according to the present invention that meets the above purpose is open at the top and rotatably connects the upper ends of the opposing shells with a central hanging member, and connects the side ends of the respective shells. In a grab bucket rotatably connected to a side hanging member via a member, a rotation shaft rotatably attached via a bearing in the upper shell on the opposing surface side of the shell; An upper opening closing plate having an upper end fixed to the rotation shaft and a gap provided so that the lower end does not come into contact with the shell curved plate during rotation, and the upper opening closing plate is provided. Stoppers are arranged at predetermined positions so that the plates do not come out from the contact surfaces of the opposing shells, and an angle detector is attached to the rotation shaft to detect the rotation angle thereof. ing.

[Effect]

In the closed type grab bucket according to the present invention, a rotating shaft is provided in the shell above the opposing contact surfaces of the shell via a bearing, and the upper end of the upper opening closing plate is attached to the rotating shaft. Fixed. Furthermore, since the lower end does not come into contact with the shell curved plate during rotation, the upper opening closing plate can freely rotate around the rotation axis within the shell, and Since the stopper is arranged so that the upper opening closing plate does not protrude from the abutment surface of the opposing shell, normally when the closed type grab bucket is open, the upper opening closing plate does not touch the stopper. Therefore, it is arranged near a predetermined contact surface. When the closed type grab bucket is submerged in water in this state, the upper opening closing plate and the shell curved surface plate do not come into contact with each other, and a gap is provided, so that water flows through the contact surface of the closed type grab bucket. From a certain gripping part, the water passes through the gap between the upper opening closing plate and the shell curved plate and escapes from the upper opening of the shell, so there is little resistance and the water can sink into a predetermined position without any trouble. become.

Moreover, when the closed type grab bucket is placed on an object to be grabbed in an open state and the central hanging member that freely hangs the upper end of the shell is pulled up, the closed type grab bucket can be lifted up. In this case, the upper opening closing plate will be pushed up and moved depending on the amount of contents held in the shell. When a predetermined amount of objects is grabbed into the shell, the upper opening of each shell is closed by the upper opening closing plate, and the inside of the shell is sealed.

Therefore, during dredging work, internal sludge, mud, etc. will not leak into the water, and furthermore, during bulk material work on land, dust will not leak to the outside.

The upper opening closing plate rotates according to the contents, and since an angle detector is attached to the rotation axis, the angle of the upper opening closing plate can be detected. Thus, the amount of grip can be measured.

〔Example〕

Next, an embodiment embodying the present invention will be described with reference to the attached drawings to provide an understanding of the present invention.

1 is a schematic perspective view of a closed type grab bucket according to an embodiment of the present invention, FIG. 2 is a side view of the closed type grab bucket according to the embodiment in a closed state, and FIG. 3 is a schematic perspective view of the closed type grab bucket according to the embodiment. 4 is a detailed explanatory view of section A in FIG. 1, FIG. 5 is a detailed sectional view of section B in FIG. View C
FIG.

As shown in FIG. 1, a closed type grab bucket 10 according to an embodiment of the present invention has left and right shells 11, 12 forming the main body of the closed type grab bucket, and the upper ends of the shells 11 and 12 can be freely rotated. A hanging central hanging part 13, a side hanging member 16 which rotatably connects the side ends of the shells 11 and 12 with connecting members 14 and 15, and a hanging central hanging part 13,
upper opening closing plates 17 and 18 (shown in FIGS. 2 and 3) that close the upper openings of shells 11 and 12, and stoppers 19 and 20 disposed inside the shells 11 and 12. It is configured with These will be explained below, but since the central hanging member 13 and the side hanging members 16 are well known, detailed explanation thereof will be omitted.

The side plates 21 and 22 of the shells 11 and 12 are flat, but the curved plates 23 and 24 connecting the side plates 21 and 22 have a substantially arcuate cross section.

Inside the shells 11 and 12, opposing bearings 25 and 26 are provided at the center of the curved plates 23 and 24, respectively, as shown in FIGS. 2 and 3.

As shown in FIG. 4, these bearings 25 and 26 consist of a lower bearing 27 which is fixed to the side plate 21 (the same applies to 21) and has a semi-circular bearing portion formed on its upper surface, and a lower bearing 27 which is fixed to the side plate 21 (the same applies to 21) and has a semi-circular bearing portion formed on its upper surface. A bearing portion paired with an arc-shaped bearing portion is formed, and the lower bearing 27
and an upper bearing 28 which is engaged by a screw.

These bearings 25 and 26 have rotating shafts 29 and 30, respectively.
is inserted, and the non-bearing portions of the rotating shafts 29, 30 have a rectangular cross section, and the upper end portions of the upper opening closing plates 17, 18 are fixed, so that the upper opening closing plates 17, 18 are fixed. It is designed to rotate within the shells 11 and 12 around rotation shafts 29 and 30.

The lower ends of the upper opening closing plates 17, 18 are connected to the curved plates 23, 24 of the shells 11, 12.
The upper ends of the curved plates 23 and 24 forming the upper openings of the shells 11 and 12 are provided with gaps so that air or seawater can freely enter and exit the shells 11 and 12. The upper opening closing plates 17 and 18 are provided with sealing plates 31 and 32 that abut the lower ends thereof (as shown in the third figure), thereby sealing the upper portions of the shells 11 and 12. There is. At the lower end of this upper opening closing plate 18 (the same applies to 17),
As shown in FIG. 6, a transverse reinforcing member 18a is provided, and a hole 18b is provided in this reinforcing member 18a, so that a cotter 18c can be inserted thereinto.

By using the cotter 18c in this manner, the upper opening closing plate 18 can be fixed to the sealing plate 32, which is convenient when transporting the closed type grab bucket 10 or adjusting the upper opening closing plate 18. be.

Note that edge members, which are peripheral blind plates (not shown) that come into contact with the upper opening closing plates 17 and 18 when the upper opening is closed, are also fixed to the side plates of the shells 11 and 12. The goal is to complete 12 seals.

As shown in FIG. 4, a hole 33 (preferably a square hole) is provided at one end of the rotation shaft 30, and a hole 33 (preferably a square hole) is provided in the side plate 22 of the shell 12 so as to communicate with the hole 33. A hole 34 larger than the hole 33 is formed. Then, as shown in FIG. 5, an angle detector 36 (not shown in FIGS. 1, 2, and 3) with a rod 35 that fits into the hole 33 is attached and rotated. The angle of the moving shaft 30, that is, the angle of inclination of the upper opening closing plate 18 with respect to the shell 12 can be detected, so that the amount of objects stored inside the closed type grab bucket 10 can be measured.

The angle detector 36 is configured to electrically or optically detect the rotation angle of the rod 35 and generate an electrical signal.

As shown in FIG. 4, a scraping plate 37 is attached to the tip of the upper opening closing plate 18 (the same applies to 17) via a support member 38 having a gap sufficient for water to pass through. It is possible to scrape off sticky substances adhering to the inside of the curved plate 24 of the shell 12.

The upper opening closing plates 17, 1 are provided inside the contact surfaces of the opposing shells 11, 12.
The stopper 19, 20 that both ends of the
is attached so that even when the closed type grab bucket 10 is opened, the upper opening closing plates 17, 18 do not protrude from the contact surfaces of the shells 11, 12 and hang down.

Next, the operation of the closed type grab bucket tote 10 according to an embodiment of the present invention will be explained in more detail. When the hanging member 16 is raised, the closed grab bucket bag 10 will open as shown in FIG.
In this case, the upper opening closing plates 17, 18 are in contact with stoppers 19, 20 provided inside the shell, so that they do not hang down and substantially cover the contact surface of the shell. In this state, when the closed type grab bucket 10 is placed on the object to be grabbed and the central hanging member 13 is raised, the closed type grab bucket 10 is closed and the shells 11, 1
The object is picked up by two curved plates 23, 24 and fork-like objects 40, 41 provided at their tips. Along with the amount of things you are trying to grab,
The upper opening closing plates 17 and 18 are pushed and the rotation shaft rotates, and the angle detector 36 detects the rotation angle of the upper opening closing plate 18, which is housed in the closed glove bucket 10. It shows the amount of something.

When an object is pushed into the closed type grab bucket 10 by a certain amount or more, the upper opening closing plate 1
7 and 18 come into contact with the sealing plates 31 and 32 provided at the edges of the upper openings of the shells 11 and 12 and the peripheral blind plate (not shown), thereby sealing the objects stored inside the shells. It is.

In this way, after picking up an object with the closed type grab bucket 10 and transporting it to a predetermined position, the central hanging member 13 is lowered and the closed type grab bucket 10
0, the stored items will fall, but in this case, the upper opening closing plates 17 and 18 will also rotate, accelerating the fall of the stored items. Upper opening closing plate 1
Scraping plates 3 provided at the tips of 7 and 18
7, the material adhering to the inner surface of the shell is almost completely scraped off.

In the above embodiment, the scraping plate was constructed from a simple flat plate, but depending on the object to be picked up, it may be formed into a fork shape, and it may also be formed into a fork-like shape at the upper openings of the shells 11 and 12. It is also possible to complete the seal inside the shell by attaching elastic rubber plates or the like to the lower surfaces of the sealing plates 31, 32 and the peripheral blind plate.

Note that the upper opening closing plates 17 and 18 may not be used depending on the work, so if they are not needed, the upper opening closing plates 17 and 18 can be removed by removing the upper bearing 28. It is also possible to remove it from the closed grab bucket bag 10.

[Effect of idea]

As is clear from the above description, the closed type grab bucket according to the present invention has an opening above the opposing shells, and an upper opening closing plate that closes the opening when pushed by an object picked up. Since this is installed, there is no water pollution during dredging work, etc., and less dust is generated during bulk material work on land.

Further, the angle of the upper opening closing plate changes depending on the amount of objects picked up by the closed type grab bucket, and an angle detector is attached to the rotation axis, so that it can be stored in the shell. It becomes possible to measure the amount of something being carried.

When lowering the closed type grab bucket into water, the water passes through the shell from the bottom to the top, reducing water resistance. It will be possible to drop it off at the location.

In addition, it can be constructed by attaching the upper opening closing plate, its bearing, and the sealing plate to a normal grab bucket, so the structure is simple, and by selecting appropriate materials, it can be made lightweight compared to its capacity. It will be possible to provide a closed grab bucket.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of a closed type grab bucket according to an embodiment of the present invention, FIG. 2 is a side view of the closed type grab bucket according to the embodiment in a closed state, and FIG. 3 is a schematic perspective view of the closed type grab bucket according to the embodiment. A side view of the opened state, FIG. 4 is a detailed explanatory view of the section A in FIG. 1, FIG. 5 is a detailed sectional view of the section B in FIG. FIG. Explanation of symbols, 10... Closed type grab bucket,
11, 12...Ciel, 13...Central hanging member,
14, 15... Connection member, 17, 18... Upper opening closing plate, 19, 20... Stopper, 23,
24... Curved plate, 25, 26... Bearing, 29, 3
0... Rotating shaft, 31, 32... Sealing plate, 36...
Angle detector.

Claims (1)

[Claims for Utility Model Registration] (1) The upper ends of the shells that are open at the top and facing each other are rotatably connected by a hanging member in the center, and the side ends of the respective shells are connected by connecting members. In a grab bucket which is rotatably connected to a side hanging member via a pivot shaft, the pivot shaft is rotatably attached to the upper shell on the opposing contact surface side of the shell via a bearing; an upper opening closing plate in which the upper end of the rotating shaft is fixed and the lower end does not come into contact with the shell curved plate during rotation, and a gap is provided, and the upper opening closing plate is provided. The stopper is arranged at a predetermined position so that the stoppers do not come out from the abutment surfaces of the opposing shells, and an angle detector is attached to the rotation shaft to detect the rotation angle thereof. Features a closed type grab bucket. (2) The shell curved plate at the upper opening of the shell has
A closed type grab bucket according to claim 1, which is provided with a sealing plate against which the upper opening closing plate comes into contact. (3) The closed type grab bucket belt according to claim 1 or 2, wherein the rotating shaft fixed to the upper opening closing plate is detachably attached. (4) The closed type grab bucket according to claim 1, 2 or 3, wherein a scraping plate is attached to the lower end of the upper opening closing plate via a support member.