JPH07309450A - Bucket for unloader - Google Patents

Abstract

PURPOSE:To prevent sticking and accumulation of fine powder of a bulk cargo in a bucket. CONSTITUTION:A bucket for an unloader is provided with an elastic plate 20A which covers an inside bottom surface part 12d' and whose peripheral edge is adhered and fixed to an upper plate 12a, a side plate 12b and a lower plate 12c and at least surface 20A' is hydrophobic and a coil spring 15 interposed between this elastic plate 20A and the inside bottom surface part 12d'. When a bulk cargo is received in a bucket 12A, the coil spring 15 is compressed by this bulk cargo, on the one hand, when the bulk cargo is delivered from the bucket 12A, the coil spring 15 and the elastic plate 20A restore by elastic force of the coil spring 15, and fine powder of the bulk cargo on the surface 20A' is also shaken down by an elastic restoring action of this coil spring 15 and a phydrophobic property of the elastic plate 20A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an unloader bucket, and is particularly useful when applied to the prevention of the deposition and accumulation of loose powder of fine powder on the inner surface of the bucket.

[0002]

2. Description of the Related Art FIG. 7 is a side view showing a vertical transfer column portion of a general unloader equipped with a bucket according to the prior art.
FIG. 8 is an enlarged view of the bucket shown in FIG.
9 is a view taken along the line IX-IX of FIG. 8, FIG. 10 is a view taken along the line XX of FIG. 9, and FIG. 11 is a sectional view taken along the line XI-XI of FIG. In these figures, 1 is a supine boom, 2 is a parallel link,
3 is an L frame, 4 is a vertical column, 5 is a vertical frame, 5
a and 6a are shafts, 6 is a bottom frame, 6a is a cylinder,
7 is a drive sprocket, 8 is an intermediate guide sprocket,
9 is a rear guide sprocket, 10 is a front guide sprocket, 11 is a bucket chain, 12 'is a bucket, 1
2a is an upper plate, 12b is a side plate, 12c is a lower plate, 12d is a bottom part, 12d 'is a bottom part, 12d' is an inner surface of the bottom part 12d (hereinafter referred to as an inner bottom part), 12e is an opening part, 12f is a support fitting, and 13 is loaded on a carrier ship. It is a bulk cargo.

Of these, the elevation boom 1 is provided on the upper part of the unloader, and the vertical column 4 and the like are moved up and down by the elevation movement. The parallel link 2 is provided parallel to the elevation boom 1 and performs an elevation operation together with the elevation boom 1. The L frame 3 supports the vertical column 4 at the lower end, and the upper end and the intermediate part are rotatably supported by the parallel link 2 and the tip ends of the elevation boom 1 so that the horizontal posture of the lower end is maintained. Has been done.

The upper end of the vertical frame 5 is connected to the lower end of the vertical column 4 via a shaft 5a, and the middle part is
A cylinder 5b whose one end is supported by the lower end of the vertical column 4.
Is connected to the other end of the cylinder 5 and is swung about the shaft 5b by the expansion and contraction of the cylinder 5b. Bottom frame 6
The rear end portion (right end portion in FIG. 7) is connected to the lower end portion of the vertical frame 5 via a shaft 6a, and the intermediate portion is connected to the other end of the cylinder 6b whose one end is supported by the vertical frame 5. By the expansion and contraction of the cylinder 6b, the cylinder 6b is oscillated about the shaft 6a and held horizontally, and forms a substantially L shape together with the vertical frame 5. The drive sprocket 7 is provided in the upper end chamber of the vertical column 4, and
To drive the bucket chain 11 in the direction of the arrow 11a. The intermediate guide sprocket 8, the rear guide sprocket 9 and the front guide sprocket 10 are provided near the lower end of the vertical column 4, at the rear end of the bottom frame 6 (on the shaft 6a) and at the tip of the bottom frame 6, respectively. , And engages with the bucket chain 11 to guide the bucket chain 11 to move in a substantially L shape in the direction of the arrow 11a.

A large number of buckets 12 'are attached to the bucket chain 11 at predetermined intervals via support fittings 12f (see FIG. 10) provided on both side plates 12b, and along with the bucket chain 11 in the direction of arrow 11a. Travel around.
The bucket 12 'generally has the shape shown in FIGS. That is, the opening 12e side is wide, and the lower plate 12c and the side plate 12b are extended from the opening 12e toward the inner bottom.
And taper in a tapered manner and narrow, and at the same time, the entire kuma, that is, between the upper plate 12a and the side plate 12b, the side plate 12b and the lower plate 1
2c and the bottom portion 12d are curved. A notch taper portion 12g is formed at the end of the side plate 12b and the lower plate 12c on the side of the opening 12e.

Therefore, according to the unloader having the above-mentioned structure, when the bucket chain 11 is circulated while traveling in the direction perpendicular to the paper surface of FIG. 7 by the traveling unit (not shown), the bucket 12 passes the front guide sprocket 10. And scraping the bulk load 13 while horizontally moving rearward (toward the rear guide sprocket 9) and picking up the bulk load 13 scraped when the opening 12e turns upward via the rear guide sprocket 9. It is received inside and conveyed to the inside of the vertical column 4 above, and at the time when the opening 12e is turned downward via the drive sprocket 7a, the bulk material 13 inside is discharged. Thus, the bulk cargo 13 is unloaded.

[0007]

However, in the bucket 12 'according to the prior art as described above, when the unloading operation of the bulk load 13 is continuously performed, the curved inner bottom surface portion 12d' of each bucket 12 'is After the bulk cargo 13 is discharged, the fine powder contained in the bulk cargo 13 remains attached. As a result, the fine powder deposit 14 is formed, which gradually grows into a deposit 14 '. That is, each bucket 12 'moves cyclically while having such a depositing portion 14'. Bucket chain 11 is 40m
It has a height close to which a large number of buckets 1
Due to the provision of 2 ', the total weight and the total volume of the depositing parts 14' of all the buckets 12 'will be significant.

For this reason, the unloading amount of the bulk load 13 per hour is reduced, the unloading efficiency is lowered, and a high load condition is given to the unloader body, which increases the structural weight of the unloader body itself. Further, conventionally, the work of removing the deposit 14 'is manually performed at regular intervals, but it is not easy because the deposit 14' is firmly adhered to the inner bottom surface 12d 'in a compacted state.

Therefore, in view of the above-mentioned prior art, it is an object of the present invention to provide an unloader bucket capable of preventing the deposition and accumulation of fine powder of loose cargo in the bucket.

[0010]

A first structure of the present invention that achieves the above object is an unloader bucket for receiving and transporting bulk cargo scraped off at an opening, the bucket being at least one of the buckets. A non-hydrophilic elastic plate is provided near the inner bottom surface.

A second structure of the present invention that achieves the above object is an unloader bucket that receives and conveys bulk cargo scraped off at an opening therein, at least near the inner bottom surface of the bucket. And a non-hydrophilic plate and an elastic member interposed between the non-hydrophilic plate and the inner bottom surface portion.

[0012]

According to the first aspect of the present invention, when the scraps scraped into the bucket are received, the elastic plates are compressed by the bulk loads, while the bulk loads are discharged from the bucket. , The elastic plate is restored to the state before being compressed by the elastic force. Therefore, at this time, the loose powder of fine powder is also wiped off due to the elastic restoring action and non-hydrophilicity of the elastic plate. For this reason, it becomes difficult for the fine powder to adhere to the inside of the bucket, and adhesion and deposition of the fine powder is prevented for a long period of time.

Further, according to the second aspect of the present invention, when the scraps scraped into the bucket are received, the elastic members are compressed by the scraps through the plate, while the scraps are loaded from the buckets. When is discharged, the elastic force of the elastic member restores the state before the elastic member and the plate are compressed. Therefore, at this time, due to the elastic restoring action of the elastic member and the non-hydrophilicity of the plate, the loose powder of fine particles is also removed. For this reason, it becomes difficult for the fine powder to adhere to the inside of the bucket, and adhesion and deposition of the fine powder is prevented for a long period of time.

[0014]

Embodiments of the present invention will now be described in detail with reference to the drawings. The same parts as those of the conventional art are designated by the same reference numerals, and the overlapping detailed description will be omitted.

FIG. 1 is a vertical sectional view showing a bucket of an unloader according to a first embodiment of the present invention, and FIG. 2 is a view taken along the line II-II of FIG. In both figures, 12A is a bucket, 12
a is an upper plate, 12b is a side plate, 12c is a lower plate, 12d is a bottom part, 12d 'is an inner bottom part, 12e is an opening part, 12g is a cutting taper part, 15 is a coil spring, 20A is an elastic plate, 2
0A ′ is the surface of the elastic plate 20A, and 20A ″ is the elastic plate 20A.
Is the back side of.

That is, the bucket 12A according to the first embodiment.
Is a bucket 12 'according to the prior art shown in FIGS.
In addition, the elastic plate 20A and the coil spring 15 are provided.

The elastic plate 20A is disposed along the inner bottom surface portion 12d 'of the bucket 12A so as to cover the inner bottom surface portion 12d', and its peripheral edge is adhered to the inner surfaces of the upper plate 12a, the side plate 12b and the lower plate 12c. It is fixed. This elastic plate 20
A is an elastic plate such as a flexible rubber plate which is non-hydrophilic at least on the surface 20A 'and is wear-resistant. Many coil springs 15
Are appropriately dispersed and arranged between the elastic plate 20A and the inner bottom surface portion 12d ', and both ends are provided with the back surface 2 of the elastic plate 20A.
0A ″ and the inner bottom surface portion 12d ′. That is, in the bucket 12A, the elastic plate 20A is urged by the coil spring 15 under the unloaded condition in which the bulk load 13 (see FIG. 7) is not contained. A predetermined space is maintained between the bottom surface portion 12d 'and the bottom surface portion 12d'.

Therefore, the bucket 12A having the above structure is provided in the unloader shown in FIG. 7 in place of the conventional bucket 12 '.
When the bulk load 13 is unloaded, the bucket 12A scrapes off the bulk load 13 while moving below the bottom frame 6, and then the opening 12e is turned upward via the rear guide sprocket 9 to move the bulk load 13 inward. When received, the loose spring 13 compresses the coil spring 16 via the elastic plate 20A. On the other hand, after that, when the bucket 12A turns downward through the opening 12e through the drive sprocket 7 and discharges the bulk load 13 inside, before the coil spring 15 and the elastic plate 20A are compressed by the elastic force of the coil spring 15. State, that is, the empty state as described above is restored.

Therefore, at this time, due to the elastic restoring action of the coil spring 15 and the non-hydrophilicity of the elastic plate 20A, the surface 20
The fine powder of the loose load 13 on A'is also removed.
Therefore, it becomes difficult for the fine powder to adhere to the inside of the bucket 12A, and the adhesion and deposition of the fine powder can be prevented for a long period of time.

FIG. 3 is a vertical sectional view showing a bucket of an unloader according to a second embodiment of the present invention, and FIG. 4 is a view taken along the line IV-IV in FIG. In both figures, 12B is a bucket and 12 is a bucket.
a is a top plate, 12b is a side plate, 12c is a bottom plate, 12d is a bottom part, 12d 'is a bottom part, 12d' is an inner bottom part, 12e is an opening part, 12g is a cutting taper part, 16 is a balloon-like air bag, 20B is an elastic plate, 2
OB 'is the surface of the elastic plate 20B.

That is, the bucket 12B according to the second embodiment.
Is a bucket 12 'according to the prior art shown in FIGS.
In addition, the elastic plate 20B and the balloon-shaped air bag 16 are provided.

The elastic plate 20B is arranged along the inner bottom surface portion 12d 'of the bucket 12B so as to cover the inner bottom surface portion 12d', and its peripheral edge is attached to the inner surfaces of the upper plate 12a, the side plate 12b and the lower plate 12c. It is fixed. This elastic plate 20
B is an elastic plate such as a flexible rubber plate which is non-hydrophilic and wear-resistant at least on the surface 20B '. The balloon-shaped air bag 16 is interposed between the elastic plate 20B and the inner bottom surface portion 12d ', and air having a pressure of about 1 kg is enclosed inside.
That is, in the bucket 12B, the elastic plate 20B is urged by the balloon-shaped air bag 16 to maintain a predetermined gap with the inner bottom surface portion 12d 'in an empty state in which the bulk load 13 (see FIG. 7) is not contained. .

Therefore, the bucket 12B having the above construction is provided in the unloader shown in FIG. 7 in place of the conventional bucket 12 '.
When the bulk load 13 is unloaded, the bucket 12B scrapes the bulk load 13 while moving below the bottom frame 6, and then the opening 12e is turned upward via the rear sprocket 9 to receive the bulk load 13 inside. At this time, the bulky bag 13 compresses the balloon-shaped air bag 16 through the elastic plate 20B and spreads it in a flat shape. Meanwhile, after that bucket 1
When 2B turns the opening 12e downward through the drive sprocket 7 and discharges the bulk cargo 13 inside, the elastic force of the balloon-shaped air bag 16, that is, the pressure of air, causes the balloon-shaped air bag 16 to move.
The elastic plate 20B is restored to the state before being compressed, that is, the empty state as described above.

Therefore, at this time, due to the elastic restoring action of the balloon-like air bag 16 and the non-hydrophilicity of the elastic plate 20B, the surface 20
The fine powder of the loose load 13 on B'is also removed.
Therefore, it becomes difficult for the fine powder to adhere to the inside of the bucket 12B, and the adhesion and deposition of the fine powder is prevented for a long period of time.

FIG. 5 is a vertical sectional view showing a bucket of an unloader according to a third embodiment of the present invention, and FIG. 6 is an enlarged view of a VI portion of FIG. In both figures, 12D is a bucket, 12a is an upper plate, 12b is a side plate, 12c is a lower plate, 12d is a bottom part, 1
2d 'is an inner bottom surface portion, 12e is an opening portion, 12g is a cutting taper portion, 17 is a thick plate step portion, 20D is an elastic plate, and 20D' is a surface of the elastic plate 20D.

That is, the bucket 12D according to the third embodiment.
Is a bucket 12 ′ according to the prior art as shown in FIGS. 8 to 11, which includes an elastic plate 20 </ b> D and a thick plate step portion 17.

The thick plate step portion 17 includes an upper plate 12a and side plates 12b.
And a step portion formed by making the plate thickness of the end portion of the lower plate 12c on the opening 12 side thicker than the other portions. The elastic plate 12D is attached by fitting or partial joining so as to come into contact with the entire surface inside the bucket 12D inside the thick plate step portion 17. The elastic plate 12D is an elastic plate such as a flexible rubber plate having a slightly thick surface, at least the surface 20D 'of which is non-hydrophilic and wear resistant.

Therefore, the bucket 12D having the above structure is provided in the unloader shown in FIG. 7 in place of the conventional bucket 12 '.
When the bulk load 13 is unloaded, the bucket 12D scrapes off the bulk load 13 while moving below the bottom frame 6, and then the opening 12e is turned upward via the rear guide sprocket 9 to move the bulk load 13 inward. When receiving, the bulk load 13 compresses the elastic plate 20D to elastically deform it. On the other hand, after that, when the bucket 12D turns downward through the opening 12e through the drive sprocket 7 and discharges the bulk load 13 inside, the elastic force of the elastic plate 20D itself causes the elastic plate 20D before being compressed. State, that is, elastic plate 2
The 0D plate thickness is restored to the normal state.

Therefore, at this time, due to the elastic restoring action of the elastic plate 20D itself and the non-hydrophilic property, the fine powder of the loose load 13 on the surface 20D 'is also removed. Therefore, it becomes difficult for the fine powder to adhere to the inside of the bucket 12D, and the adhesion and deposition of the fine powder is prevented for a long period of time.

As described above, according to the above-mentioned first, second and third embodiments, it becomes difficult for the fine powder of the bulk load 13 to adhere to the inside of the buckets 12A, 12B, 12D. Since the adhesion and deposition of the fine powder can be remarkably reduced, it is possible to solve the conventional decrease in the unloading efficiency due to the deposition of the fine powder, and to reduce the load condition on the unloader body structure. it can. Of course, it is possible to save the trouble of removing the deposited portion of the fine powder.

The range of mounting the elastic plates 20A, 20B and 20D is, of course, not limited to the ranges shown in the first, second and third embodiments, but the buckets 12A and 1A.
According to the shapes of 2B and 12D, the range in which the fine powder of the loose load 13 is likely to be deposited and deposited may be arbitrarily selected and determined.

[0032]

According to the present invention as described in detail with reference to the above embodiments, since the non-hydrophilic elastic plate is provided near the inner bottom surface of the bucket, the elastic restoring action and the non-hydrophilic property of the elastic plate are prevented. Because of the hydrophilicity, the loose powder of fine powder is blown off, so that it becomes difficult for the fine powder to adhere to the inside of the bucket.
Further, since the non-hydrophilic plate and the elastic member are provided, the non-hydrophilic property of the plate and the elastic restoring action of the elastic member more effectively removes the fine powder. Makes it difficult to adhere. Therefore, in any case, it is possible to prevent the deposition and accumulation of the fine powder for a long period of time, and it is possible to eliminate the decrease in the unloading efficiency due to the conventional deposition of the fine powder, and the load condition on the unloader body structure. Can be reduced. Further, it is possible to save the trouble of removing the deposited portion of the fine powder.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing a bucket of an unloader according to a first embodiment of the present invention.

FIG. 2 is a view taken along the line II-II of FIG.

FIG. 3 is a vertical sectional view showing a bucket of an unloader according to a second embodiment of the present invention.

FIG. 4 is a view taken along the line IV-IV of FIG.

FIG. 5 is a vertical sectional view showing a bucket of an unloader according to a third embodiment of the present invention.

6 is an enlarged view of a VI portion of FIG.

FIG. 7 is a side view showing a vertical transfer column portion of a general unloader including a bucket according to the related art.

8 is an enlarged view of the bucket shown in FIG. 7, taken along the line VIII-VIII.

9 is a view taken along the line IX-IX in FIG.

10 is a view taken along line XX in FIG.

11 is a cross-sectional view taken along the line XI-XI of FIG.

[Explanation of symbols]

 12A, 12B, 12D Bucket 12a Upper plate 12b Side plate 12c Lower plate 12d Bottom part 12d 'Inner bottom part 12e Opening part 12g Cutting taper part 15 Coil spring 16 Balloon-like air bag 17 Thick plate step part 20A, 20B, 20D Elastic plate 20A' , 20B ', 20D' Front surface 20A "Back surface

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Kenichi Kimoto 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima-shi, Hiroshima Prefecture Mitsubishi Heavy Industries Hiroshima Works

Claims (2)

[Claims] 1. A bucket of an unloader for receiving and transporting bulk cargo scraped off at an opening therein, wherein a non-hydrophilic elastic plate is provided at least near the inner bottom surface of the bucket. And an unloader bucket. 2. A bucket of an unloader for receiving and transporting bulk cargo scraped off at an opening therein, wherein a non-hydrophilic plate and the non-hydrophilic plate are provided at least near an inner bottom surface of the bucket. An unloader bucket comprising: a plate and an elastic member provided between the inner bottom surface portion.