JP3396383B2 - Bucket chain drilling rig - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket chain excavator used for an unloader for cargo handling work.

[0002]

2. Description of the Related Art FIGS. 3 to 4 show a conventional example of a bucket chain excavator used for a continuous unloader for cargo handling work. FIG. 3 is a side view thereof, and FIG. 4 is an AA line of FIG. It is an arrow view (front view).

3 and 4, 50 is a bucket elevator column supported by the boom end of a continuous unloader, 51 is the front surface of the bucket elevator column 50,
The upper end is connected to the chain tension adjusting means (cylinder) 52, and is a gate-shaped upper vertical frame provided so as to be slidable up and down by the guide roller 53. 54 is tiltable at the upper end to the lower end of the upper vertical frame 51. Is a lower vertical frame that is axially connected to. Further, 55 is a bottom frame axially connected to the lower end of the lower vertical frame 54 in a T-shape so that the middle part can be tilted, and 56 is a lower end front surface of the upper vertical frame 51 and an intermediate surface of the lower vertical frame 54. It is a pair of tilting means (cylinders) axially connected between them.

Reference numeral 57 is a horizontal holding means axially connected between an intermediate portion of the lower vertical frame 54 and an upper surface near the rear end of the bottom frame 55, and 58a and 58b are attached to the front and rear ends of the bottom frame 55. The guide sprockets 58c to 58e are guide sprockets provided inside the lower end of the bucket elevator column 50. Further, 60 is a bucket chain which is engaged with guide sprockets 58a to 58e around the T-shaped frame and is circulated and driven in the Z direction of FIG. 3, and 60a is a large number of buckets supported on the bucket chain 60. .

When the conventional unloader bucket chain excavator is operating, the lower vertical frame 54 is tilted between the solid line position and the chain line position in FIG. 3 by the expansion / contraction driving operation of the tilting means 56, and further the horizontal holding means. The bottom frame 55 is held horizontally by the expansion / contraction drive operation of 57, and the lower end excavation portion of the bucket chain 60 is moved between the solid line position and the chain line position in FIG. 3. At this time, the increase or decrease of the tension of the bucket chain 60 (slack of the chain) caused by the tilting of the lower vertical frame 54 is adjusted by the expansion and contraction driving operation of the tension adjusting means 52 to maintain the bucket chain 60 at a constant tension, Further, while the thrust adjusting means 52 buffers the thrust force applied to the excavated portion of the bucket chain 60 from the ship carrying the bulk cargo, the bucket chain 6
By circling driving 0, the unloading operation of the bulk cargo from the ship is performed.

[0006]

In the conventional bucket chain excavator for unloaders shown in FIGS. 3 to 4, the vertical frames 51 and 54, the upper and lower vertical frames, and the tension adjusting means 5 are used.
2, all the mechanisms of the tilting means 56 and the horizontal holding means 57 are arranged so as to be exposed on the outer surface side of the front wall of the bucket elevator column 50 and configured to extend downward, and therefore the mechanism of these excavating parts. In addition to facilitating the daily inspection and repair work, it has the advantage that the fine powder of the loose cargo that falls from the bucket elevator column 50 during the unloading operation of the bucket chain 60 is unlikely to adhere to the excavation mechanism.

However, since such an excavator uses the slide-type upper vertical frame 51, the entire structure of the inverted T-shaped excavation section frame becomes large in size and structurally complicated, and the bucket elevator column 50 has the same structure. There is a problem that the total weight increases.

It is an object of the present invention to provide a bucket chain drive device having a simple structure and a reduced weight while maintaining the same inspection and serviceability as those of the conventional ones.

[0009]

Means for Solving the Problems The present invention solves the above problems, and the gist of the invention is to connect a bottom frame, which is arranged substantially horizontally below a bucket elevator column, through a sprocket. In a bucket chain excavating device in which a bucket chain having a large number of buckets is circulated to scrape and transport bulk cargo into the bucket, the lower end of the bucket elevator column is used as a fulcrum. A vertical frame swingably supported in the front-rear direction, a link frame installed between a lower end of the vertical frame and a support point on the bottom frame, and an intermediate portion between the lower end of the link frame and the vertical frame. And a chain tension adjusting means such as a hydraulic cylinder that is extendable between the vertical frame and the link frame. And the chain tension adjusting means are connected so as to form a triangular shape, and the chain tension adjusting means is expanded and contracted to rotate the link frame around the connection point between the link frame and the vertical frame. The bottom frame is configured to be vertically displaced.

According to the above means, when the bucket chain is loosened or the tension is increased due to the tilting movement of the vertical frame, the tilting means, etc., the link frame is vertically framed when the chain tension adjusting means is extended or contracted. The lower end of the bucket chain and the bottom frame connected thereto move up and down to rotate around the lower end of the bucket chain, thereby correcting the looseness or the increase in the tension of the bucket chain.

When a thrust force is applied to the excavated portion of the bucket chain from the hull or the like, this thrust force is transmitted to the link frame via the bottom frame, and the link frame is connected to the vertical frame. By being bent (rotated) around the connecting point, it is received by the chain tension adjusting means and is absorbed by the buffer.

In addition to the above means, between the middle portion of the vertical frame and the front upper portion of the bottom frame,
A horizontal holding means including a hydraulic cylinder for holding the bottom frame in a horizontal state is installed, and the vertical frame, the link frame, the chain tension adjusting means and the horizontal holding means can be exposed to the front side of the bucket elevator column immediately below. It is also included in the present invention that it is arranged.

According to such means, the vertical frame, the link frame, the bottom frame, the chain tension adjusting means,
Since the mechanical parts such as the horizontal holding means are arranged so as to be exposed to the front of the position directly below the bucket elevator column, the inspection and maintenance of these mechanical parts can be easily performed from the front of the device, and these mechanisms are also provided. Fine particles from the elevator column are prevented from adhering to the section.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to FIGS. 50 in FIGS.
Is a bucket elevator column supported by the boom end of a continuous unloader, and 10 is a front face whose upper end is pivotally attached to a bracket 50c at the lower end of the front corner of the bucket elevator column 50 and is tiltably supported in the front-rear direction. A vertical frame having a substantially U-shape is provided. Reference numeral 11 is a link frame in which the upper end is pivotally attached to the lower end of the U-shaped vertical frame 10 so as to be tiltable in the front-rear direction. Reference numeral 12 denotes a bottom frame. The bottom frame 12 has a bracket portion 12a projecting from the upper surface near the rear end of the link frame 1
The lower end of 1 is pivotally mounted so as to be tiltable in the front-rear direction.

Reference numeral 13 is the bucket elevator column 50.
A pair of left and right tilting means axially connected between a lower end front surface of the U-shaped vertical frame 10 and a support portion 10a of an intermediate front surface of the U-shaped vertical frame 10, and 14 supports an intermediate rear surface of the U-shaped vertical frame 10. A chain tension adjusting means is provided axially connected between the portion 10b and a support portion 11a on the rear surface of the lower end of the link frame 11, and 15 is a support portion 10c on the front surface of the lower end of the U-shaped vertical frame 10 and a bottom frame 12. Is a horizontal holding means axially connected to a bracket 12b formed on the upper surface near the front end. The tilting means 13, the chain tension adjusting means 14, and the horizontal holding means 15
Is composed of a hydraulic cylinder or a pneumatic cylinder.

At the front and rear ends of the bottom frame 12, guide sprockets 58a and 58b are provided as in the conventional case.
Is also pivotally mounted, and guide sprockets 58c to 58e are also pivotally mounted inside the bucket elevator column 50. And the guide sprockets 58a to 58e
The bucket chain 60, which is engaged with and supports a large number of buckets 60a, is rotated. A guide sprocket 58e in the bucket elevator column 50 is provided on the lower front wall 50a of the bucket elevator column 50.
To a guide sprocket 58a at the front end of the bottom frame 12 is formed with a gate-shaped opening 50b for passing the bucket 60a and the bucket chain 60. The opening 50b communicates with the U-shaped opening 10a of the vertical frame 10 axially connected to the bracket 50c at the lower end of the bucket elevator column 50 to form a passage for the bucket chain 60.

When the unloader bucket chain excavator constructed as described above is in operation, the U-shaped vertical frame 10 is driven by the synchronous expansion / contraction drive of a pair of tilting means 13 connected to the central portion of the vertical frame 10. Between the position of the solid line 1 and the position of the chain line 10 ', the bracket 50c is tilted to an appropriate position with the supporting portion of the bracket 50c as a fulcrum. At the position where the vertical frame 10 is tilted and moved, the bottom frame 12 is horizontally corrected and held by the tilting movement of the horizontal holding means 15 (extension at the chain line position). The looseness or the increase in the tension of the bucket chain 60 caused by the tilting movement of the excavating portion is adjusted and corrected by the extension / contraction drive of the chain tension adjusting means 14, so that the bucket chain 60 is kept in a constant state.

That is, when the slack of the bucket chain 60 becomes large, the chain tension adjusting means 14 is extended to guide the chain guide sprockets 58a, 58.
The bottom frame 12 to which b is attached is displaced downward, and the chain 60 is extended to increase the tension.
Further, when the bucket chain 60 is loosened to reduce the tension, the chain tension adjusting means is contracted, contrary to the above.

Bucket chain 60 for the unloader
Under such a condition, it is cyclically driven in the direction of the arrow Z in FIG. 1 to perform the unloading operation of bulk cargo from the ship. Further, when the lower excavation part of the bucket chain 60 comes into contact with the hull and receives an upward thrust force during the uplifting operation, this thrust force acts on the bottom frame 12; The force is mainly the above link frame 11 and the vertical frame 1 of this.
It acts so as to rotate around the connecting shaft 71 with 0, that is, with respect to the connecting shaft 71 in the counterclockwise direction, and is received by the chain tension adjusting means 14 and absorbed by the buffer.

The U-shaped vertical frame 10, the link frame 11, the bottom frame 12, the pair of tilting means 13, and the chain tension adjusting means 1 configured as described above.
4. The horizontal holding means 15 is arranged so as to be displaced from the position directly below the bucket elevator column 50 and exposed in a posture extending diagonally forward and downward from the front corner of the bucket elevator column 50, similarly to the conventional one shown in FIGS. 3 to 4. Therefore, the daily inspection and repair work of these respective mechanical parts can be easily performed as in the conventional one, and the fine powder falling from the inside of the bucket elevator column 50 can be maintained in a state where it is difficult to adhere.

[0021]

The present invention is configured as described above,
According to the present invention, the link frame and the chain tension adjusting means are provided between the vertical frame and the bottom frame, and the vertical frame, the link frame and the chain tension adjusting means are connected in a triangular shape. The function of adjusting the tension of the bucket chain and holding the bottom frame horizontally like the conventional one with an extremely simple structure that does not require a large member having a complicated shape such as a supporting gate-shaped upper vertical frame 51. It is possible to provide a bucket chain excavating device that can fulfill the above requirements.

According to the present invention, the mechanical parts such as the vertical frame, the chain tension adjusting means, the link frame and the horizontal holding means can be easily inspected and maintained from the front of the apparatus. With such a simple structure, it is possible to provide a device having good maintainability as in the conventional device.

[Brief description of drawings]

FIG. 1 is a side view of an unloader bucket chain excavating device according to an embodiment of the present invention.

FIG. 2 is a view on arrow BB in FIG.

FIG. 3 is a side view of a conventional bucket chain excavating device for an unloader.

FIG. 4 is a view on arrow AA of FIG.

[Explanation of symbols]

10 vertical frames 11 link frames 12 bottom frame 13 Tilting means 14 Chain tension adjusting means 15 Horizontal holding means 50 bucket elevator column 60 bucket chain 60a bucket

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-157074 (JP, A) JP-A-8-67349 (JP, A) JP-A-7-228359 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B65G 67/60 B65G 65/06

Claims (2)

(57) [Claims] 1. A bucket chain, which is connected to a bottom frame arranged substantially horizontally below a bucket elevator column via a sprocket and has a large number of buckets mounted thereon, is circulated to carry a bulk load or the like in the bucket chain. In a bucket chain excavating device that is scraped and conveyed, a vertical frame supported at the lower end of the bucket elevator column so as to be swingable in the front-rear direction about the lower end as a fulcrum, and the lower end of the vertical frame and the bottom frame. A link frame erected between the upper support point and an expandable chain tension adjusting means such as a hydraulic cylinder erected between a lower end of the link frame and an intermediate portion of the vertical frame, The vertical frame, the link frame, and the chain tension adjusting means are connected so as to form a triangular shape. A bucket characterized in that the bottom frame is vertically displaced by expanding and contracting the chain tension adjusting means and rotating the link frame around the connection point between the link frame and the vertical frame. Chain drilling equipment. 2. The vertical frame and the link frame are provided between the middle part of the vertical frame and the front upper part of the bottom frame by arranging horizontal holding means composed of a hydraulic cylinder or the like for horizontally holding the bottom frame. 2. The bucket chain excavating device according to claim 1, wherein the chain tension adjusting means and the horizontal holding means are arranged so as to be exposed to the front side of the bucket elevator column immediately below.