JP4527017B2 - Continuous unloader - Google Patents

Description

  The present invention relates to a bucket-type continuous unloader having a scraping portion extending in the horizontal direction.

  As a bucket-type continuous unloader, the one described in Patent Document 1 is known. This continuous unloader is provided with a collapsible cover at the tip of a scraping portion extending in the horizontal direction so as to be freely raised and lowered. According to this, by keeping the load collapse cover on the tip side of the scraping part, the bucket conveyor is protected against the load collapse from the tip side of the scraping part when scraping loose objects in the hold. By turning the load collapse cover above the scraping part, when the scraping part is extended, the scraps at the tip of the scraping part can be easily scraped off by the bucket conveyor. Yes.

  There is also a continuous unloader fixed so as not to rotate the load collapse cover.

JP 2000-327139 A

  By the way, in the above-described continuous unloader, when a ship shakes up and down due to a large wave or the like, the load collapse cover may receive a large thrust and rotate or be damaged. There was a problem that the position had to be restored or repaired.

  Accordingly, an object of the present invention is to provide a continuous unloader that solves the above-described problems and can make the load collapse cover maintenance-free with respect to the thrust force.

In order to solve the above-mentioned problems, the present invention wraps a bucket conveyor endlessly around an elevator part that extends vertically and a scraping part that extends in the horizontal direction from the lower end of the elevator part. In a continuous unloader that circulates so as to move from the front end side to the base end side and scrapes loose objects in the hold, the bucket conveyor is protected at the front end of the scraping portion against the collapse of the load from the front end side. The load collapse cover is provided so as to be freely raised and lowered, and the load collapse cover is supported by a shock absorber, and the load collapse cover includes a guard portion that covers the tip side of the bucket conveyor, and the guard portion is a pipe material. the formed to pass rose was while being formed by assembling in a lattice shape, the lower end of the guard portion, even scraper for breaking the front end side of the rose product is provided extending distally It is.

  The shock absorber is formed by connecting a plurality of rods so as to be slidable in the axial direction, one end is connected to the scraping portion, and the other end is connected to the load collapse cover, and the telescopic frame It may be configured to include a spring for extending or retracting the frame.

  If the elastic frame is provided with a stopper that resists the elastic force of the spring and restricts expansion or contraction of the elastic frame, and the load collapse cover is held at a predetermined position by the elastic frame having a predetermined length by the stopper. Good.

  The telescopic frame includes a proximal end rod connected to the scraping portion and a distal end rod connected to the proximal end rod so as to be slidable in the axial direction and connected to the load collapse cover. Each of the proximal end rod and the distal end rod is provided with a flange, and the spring is preferably a coil spring interposed between the flanges.

  According to the present invention, the load collapsing cover can be made maintenance-free with respect to the pushing force.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIG. 6, the bucket-type continuous unloader 1 includes a traveling unit 3 that travels along a wharf 2 on a wharf 2, a boom 4 that is pivotable and can be raised and lowered on the traveling unit 3, and a tip of the boom 4. An elevator part 6 that is provided on the part via a top support frame 5 so as to be rotatable about a vertical axis, extends vertically, a scraping part 7 that extends horizontally from the lower end of the elevator part 6, and an elevator part 6 and scraping A bucket conveyor 8 wound endlessly around the section 7 is provided.

  The elevator section 6 has a reverse sprocket 9 for winding the bucket conveyor 8 around a position above the top support frame 5. The reverse sprocket 9 is configured to reverse the bucket conveyor 8 rising from the base end side of the scraping portion 7 and to drop loose objects from the bucket 10 of the bucket conveyor 8. A rotatable table feeder (not shown) is provided below the reversing sprocket 9 to receive loose objects falling from the bucket 10 and transfer them to a conveyor (not shown) on the boom 4. Yes.

  As shown in FIG. 1 and FIG. 2, the scraping portion 7 is provided at the lower end of the elevator portion 6 so as to be movable up and down and up and down, and extends in the horizontal direction, and a bucket provided on the base end side of the support frame 11. A proximal sprocket 12 for winding the conveyor 8 and a distal sprocket 13 provided on the distal end side of the support frame 11 for winding the bucket conveyor 8 are configured. The support frame 11 includes a base end side frame 16 connected to the elevator section 6 via hydraulic cylinders 14 and 15 so as to be movable up and down, and a front end side frame 17 slidably provided on the base end side frame 16. It is formed so that it can expand and contract in the horizontal direction. The support frame 11 is provided with a hydraulic cylinder 18 that slides the proximal end frame 16 and the distal end frame 17, and the support frame 11 expands and contracts in conjunction with the raising and lowering of the scraping unit 7. Yes.

  The bucket conveyor 8 includes an endless chain (not shown) wound around the reverse sprocket 9, the base end sprocket 12, and the tip sprocket 13, and a bucket 10 provided on the endless chain for scraping and storing loose objects. It circulates on the bottom surface of the scraping portion 7 so as to move from the front end side to the base end side, thereby scraping loose objects in the hold 19 shown in FIG.

  Further, a load collapse cover 20 for protecting the bucket conveyor 8 against the collapse of the load from the distal end side is provided at the tip of the scraping portion 7 so as to be able to be raised and lowered, and for supporting the load collapse cover 20. A shock absorber 21 is provided.

  As shown in FIGS. 2, 3, and 4, the load collapsing cover 20 includes arm portions 22 that are pivotally coaxially supported by the tip sprocket 13 on both sides of the scraping portion 7 and extend in the radial direction, and these arm portions 22. And a guard portion 23 that covers the tip side of the bucket conveyor 8. The guard part 23 is formed by assembling pipe materials in a lattice shape, and receives the rose falling from the tip side of the scraping part 7 and passes it while weakening its momentum. Further, a scraping plate 24 for breaking the tip side loose article is provided at the lower end portion of the guard portion 23 so as to extend to the tip side.

  The shock absorber 21 is extended by a spring 25, and is formed by connecting a plurality of rods 26 and 27 so as to be slidable in the axial direction. One end is connected to the scraping portion 7 and the other end is loaded. An elastic frame 28 is connected to the collapsing cover 20 and includes a spring 25 that extends the elastic frame 28.

  The telescopic frame 28 is connected to the scraping portion 7 so as to be rotatable, and is connected to the proximal end rod 26 so as to be slidable in the axial direction and is also connected to the load collapse cover 20 so as to be rotatable. And a distal end side rod 27.

  The proximal end rod 26 has a male screw 29 formed at the distal end thereof and a nut 30 screwed therein. A plurality of nuts 30 are screwed together so as not to rotate easily. Also, a proximal end flange 31 for receiving a spring 25 described later is integrally provided on the proximal end side of the proximal end rod 26, and a distal end side described later is provided at an intermediate position of the proximal end rod 26. A contraction restricting member 41 is provided that contacts the flange 33 and restricts the contraction length of the telescopic frame 28.

  The distal end side rod 27 has an insertion hole 32 for allowing the proximal end side rod 26 to be inserted into an end connected to the proximal end side rod 26. The insertion hole 32 is formed to be sufficiently larger in diameter than the nut 30 and deep enough to allow the distal end side rod 27 to move in the axial direction. Further, a distal end side flange 33 for receiving a spring 25 described later is provided at the end of the distal end side rod 27 on the side where the insertion hole 32 is opened. The distal end flange 33 includes a flange base portion 34 provided to open the insertion hole 32 at the distal end of the distal end side rod 27 and a flange detachable portion 35 detachably provided on the flange base portion 34. The flange attaching / detaching portion 35 is formed in a substantially disk shape, has a receiving surface 36 that receives the spring 25, and a rod hole 37 through which the proximal end side rod 26 is inserted. The rod hole 37 is formed to have substantially the same diameter as the base end side rod 26, and guides the base end side rod 26 to be slidable and prevents the nut 30 from passing therethrough. As a result, the flange detachable portion 35 functions as a stopper that prevents the distal end side rod 27 from coming off from the proximal end side rod 26 and restricts the extension of the telescopic frame 28. Further, the base end side flange 31 and the front end side flange 33 are respectively provided with covers 38 and 39 that cover the telescopic frame 28 from above and from the side.

  The spring 25 is a coil spring interposed between the proximal end side flange 31 and the distal end side flange 33. The spring 25 is formed long enough in the expansion / contraction direction so as to elastically urge the base end side flange 31 and the front end side flange 33 in the direction in which the base end side flange 31 and the front end side flange 33 are always separated from each other. Thus, an initial compressive force can be applied. That is, when the nut 30 hits the flange attaching / detaching portion 35, the elastic frame 28 resists the elastic force of the spring 25 and restricts the expansion of the expansion frame 28. The expansion frame 28 receives the initial compression force of the spring 25 and becomes a predetermined length. It is like that. By holding the load collapsing cover 20 in a predetermined position by the stretchable frame 28 having a predetermined length, the load collapsing cover 20 is predetermined by the initial compression force of the spring 25 with respect to the force received in normal work. In response to a large push-up force that is received when the hull is shaken up and down, the spring 25 is further compressed as shown in FIG. 5 so that the load collapse cover 20 is released upward. .

  Next, the operation of this embodiment will be described.

  When scraping loose objects in the hold 19 with the bucket conveyor 8 shown in FIG. 1, the bucket conveyor 8 is moved from the distal end side to the proximal end side on the bottom surface of the scraping portion 7 with the bucket conveyor 8 in contact with the loose articles. Cycle as you do. While the bucket conveyor 8 moves on the bottom surface of the scraping unit 7, the bucket 10 scrapes the loose objects with the respective buckets 10, and vertically conveys the loose objects accommodated in the buckets 10 along the elevator unit 6.

  Further, the scraping portion 7 is spirally traversed in the hold 19 so that the roses in the hold 19 can be efficiently unloaded from the top. When scraping off loose objects in the vicinity of the inner wall 40 of the hold 19, the tip of the scraping portion 7 is directed toward the inner wall 40, and the scraping portion 7 is brought as close to the inner wall 40 as possible to scrape the loose objects. At this time, there may be cases where loose objects that could not be scraped off by the bucket conveyor 8 are piled up on the front end side of the scraping portion 7 while repeating the spiral rotation, and the loose objects cause collapse of the load. Although it may fall toward the bucket conveyor 8 that circulates at the tip of the scraping portion 7, the loose article collapsed hits the load collapse cover 20 and loses momentum, and then hits the bucket conveyor 8. Therefore, the bucket conveyor 8 is damaged. There is no equal. In addition, the load collapse cover 20 gradually scrapes the accumulated roses with the scraper 24 at the tip, thereby preventing the roses from being piled up high. Since the load collapsing cover 20 is supported by a shock absorber 21 that is stretched with an initial compressive force applied to the spring 25, the load collapsing cover 20 does not escape upward as long as the loose objects are scraped, and is stably a bucket conveyor. The roses can be scraped while protecting 8.

  In this way, when the hull is greatly swung up and down due to receiving a large wave or the like when scraping a loose object, the cargo collapse cover 20 has a large force that is not received by the scraped loose object in normal work. It will be pushed up. The load collapse cover 20 transmits the received thrust force to the shock absorber 21, and a force in the compression direction acts on the shock absorber 21. When this force is greater than the restoring force of the spring 25 compressed as described above, the spring 25 and the telescopic frame 28 are retracted, and the load collapse cover 20 is rotated upward. That is, the load collapse cover 20 can be released upward. As a result, it is possible to prevent the load collapse cover 20 from being damaged due to the pushing-up force. At this time, the contraction of the telescopic frame 28 is restricted by the front end flange 33 and the contraction restricting member 41 coming into contact with each other, so that the spring 25 is not excessively compressed and the shock absorber 21 is not damaged. Absent.

  Further, when the hull descends and the pushing-up force disappears, the shock absorber 21 is expanded again by the restoring force of the spring 25, and the load collapse cover 20 connected to the shock absorber 21 is rotated downward. At this time, the expansion of the shock absorber 21 stops when the nut 30 of the base end side rod 26 hits the front end side flange 33, and the shock absorber 21 returns to a predetermined length. The load collapse cover 20 connected to the shock absorber 21 is pushed down by the expanding shock absorber 21 and is supported again at the position where the expansion of the shock absorber 21 stops. That is, the load collapse cover 20 can be automatically returned to a predetermined position before receiving the pushing-up force.

  In this manner, a load collapse cover 20 for protecting the bucket conveyor 8 against the collapse of the load from the distal end side is provided at the tip of the scraping portion 7 so as to be able to be raised and lowered. Since it supported, even if the load collapse cover 20 receives a large pushing force, the load collapse cover 20 can be released upward, damage can be prevented, and the load collapse cover 20 released upward can be automatically returned to its original position. The load collapse cover 20 can be made maintenance-free.

  The shock absorber 21 is formed by connecting a plurality of rods 26 and 27 so as to be slidable in the axial direction. One end of the shock absorber 21 is connected to the scraping portion 7 and the other end is connected to the load collapse cover 20 and is connected to the cover 20. And the spring 25 for extending the telescopic frame 28, it can be made simple and inexpensive, and can be highly reliable.

  The expansion frame 28 is provided with a stopper (front end side flange 33) that resists the elastic force of the spring 25 and restricts the expansion of the expansion frame 28, and the load collapse cover 20 is attached by the expansion frame 28 having a predetermined length by the stopper. Since it is held at a predetermined position, an initial compressive force can be applied to the spring 25 with a simple structure, and the load collapsing cover 20 can be released against a pushing force larger than a predetermined load.

  The telescopic frame 28 includes a proximal end rod 26 coupled to the scraping portion 7, a distal end rod 27 coupled to the proximal end rod 26 so as to be slidable in the axial direction, and coupled to the load collapse cover 20. The proximal end rod 26 and the distal end rod 27 are provided with flanges 31 and 33, respectively, and the spring 25 is a coil spring interposed between the flanges 31 and 33. It can be simple and inexpensive.

  Furthermore, since the nut 30 screwed to the base end side rod 26 is applied to the front end side flange 33 serving as a stopper to restrict the length of the telescopic frame 28, the nut 30 is moved in the axial direction of the base end side rod 26. The amount of initial compression of the spring 25 can be easily adjusted by moving along, and the magnitude of the push-up force that should allow the load collapse cover 20 to escape can be easily changed.

  The spring 25 extends the telescopic frame 28, but it may be retracted. In this case, the load collapse cover 20 may be supported from below by a shock absorber (not shown).

  The spring 25 is made of a coil spring, but is not limited to this, and may be of another type as long as the elastic frame 28 is elastically extended or retracted.

  Moreover, the shock absorber 21 may reverse the distal end side and the proximal end side. That is, the distal end side rod 27 may be connected to the scraping portion 7, and the proximal end side rod 26 may be connected to the load collapse cover 20.

It is a principal part side view of the continuous unloader which shows suitable embodiment of this invention. FIG. 2 is a plan sectional view of FIG. 1. It is a front view of a load collapse cover. It is a side view of a load collapse cover and a shock absorber. It is a side view of the cargo collapse cover in the pushed-up state. It is a schematic explanatory drawing of a continuous unloader.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Continuous unloader 6 Elevator part 7 Scraping part 8 Bucket conveyor 19 Ship 20 Load collapse cover 21 Shock absorber 25 Spring 26 Base end side rod 27 Front end side rod 28 Telescopic frame 31 Base end side flange 33 Front end side flange (stopper)

Claims (4)

A bucket conveyor is wound endlessly around an elevator section that extends vertically and a scraping section that extends horizontally from the lower end of the elevator section, and the bucket conveyor moves from the front end side to the base end side on the bottom surface of the scraping section. In the continuous unloader that circulates and scrapes off the loose objects in the hold, a tip of the scraper is provided with a load collapse cover for protecting the bucket conveyor against the load collapse from the tip side. The load collapse cover is supported by a shock absorber, and the load collapse cover has a guard portion that covers the tip side of the bucket conveyor, and the guard portion is formed by assembling pipe materials in a lattice shape and is separated. A continuous unloader which is formed so as to allow an object to pass therethrough, and is provided with a scraper plate for breaking a loose article on the front end side at the lower end part of the guard part .   The shock absorber is formed by connecting a plurality of rods so as to be slidable in the axial direction, one end is connected to the scraping portion, and the other end is connected to the load collapse cover, and the telescopic frame The continuous unloader according to claim 1, further comprising a spring for extending or retracting the frame.   The expansion frame is provided with a stopper that resists the elastic force of the spring and restricts expansion or contraction of the expansion frame, and the load collapse cover is held at a predetermined position by the expansion frame having a predetermined length by the stopper. The continuous unloader according to claim 2.   The telescopic frame includes a base end side rod connected to the scraping portion, and a base end side rod connected to the base end side rod so as to be slidable in the axial direction and to the load collapse cover. The continuous unloader according to claim 2 or 3, wherein each of the side rod and the distal end side rod is provided with a flange, and the spring is a coil spring interposed between the flanges.

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