JPS63267606A - Bucket elevator type continuous unloader - Google Patents

Abstract

PURPOSE:To make it possible to facilitate change of systems in an unloader which can be selectively used for lateral excavation and catenary excavation, by guiding rollers provided to buckets with the use of a vertically split type guide rail attached to a horizontal excavating section frame and having its lower section contactable and separable to and from the rollers. CONSTITUTION:In the case of a lateral excavation system, rollers 4 are guided by upper and lower guide rails 6, 7 so that a bucket 1 is bound to an excavating section frame 8 while it is moved for excavation. In the case of a catenary excavation system, the operation of the bucket elevator is stopped, and a horizontal excavating section frame 8 is depressed so as to exert an overtention to a chain 2 by means of a cylinder which is not shown, so that the rollers 4 are made into press-contact with the upper guide rail 5. Then, under the action of the cylinder, a wedge 21 is pulled so as to move a T-like ridge 20, and the lower guide rail 7 is therefore moved to the center side so that it is separated from the rollers 4. Then the chain 20 is slackened to make the rollers 4 free. Thus, it is possible to facilitate the changeover between both systems.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a bucket elevator type continuous unloader.

[Conventional technology and its problems]

Conventionally, this type of bucket elevator type continuous unloader has two methods: a normal excavation method (side excavation method) in which bulk materials are excavated while moving the entire bucket elevator to the side of the bucket, and a bottom type excavation method in which bulk materials are excavated from the bottom of the ship. In Zarae excavation, an excavation method (catenary excavation method) that uses a chain catenary state (slack state) to absorb the shock caused by the vertical movement of the ship and to clean up loose materials at the bottom of the ship. A bucket elevator-type continuous unloader is known that uses the bucket elevator as appropriate (for example, see Japanese Patent Application Laid-Open No. 59-212325). The bucket chain is configured to be in a catenary state.

By the way, 1) Recently, as ships have become larger, the capacity of holds has become larger, and the horizontal excavation length of unloaders has become longer. 2) Therefore, the excavation horizontal force (not only the force that pulls the bucket but also the force that acts vertically or horizontally)
all of these effects on the chain, which made it necessary to make the chain stronger. 3) As a result, the weight has increased.

4) Therefore, in order to prevent vertical or lateral forces from acting on the chain, it became necessary to provide a guide rail at the front of the horizontal m and to attach a roller guided by this guide rail to each bucket.

That is, the known unloaders have the above-mentioned problems or needs, and when trying to attach guide rails and rollers to meet these problems, they have the disadvantage that catenary-like excavation is not possible.

[Means for solving problems]

Therefore, the present invention was created in order to eliminate such inconveniences, and is a bucket elevator type continuous unloader that can selectively use a side excavation method and a catenary excavation method. A guide rail provided on the horizontal excavation part frame of , guides the roller, faces at the back, and is divided into an upper and a lower part, and a lower guide rail facing these, in order to engage and separate from the roller, The present invention provides a bucket elevator type continuous unloader comprising a mechanism for moving the objects toward and away from each other.

(Example) The structure of the present invention will be explained in detail with reference to the embodiment shown in the accompanying drawings. The unloader is shown, FIG. 1 is a plan view of the main part of the first embodiment, and the right side of FIG. 2 is A of FIG. 1.
-A sectional view, the left side of FIG. 2 is a B-8 sectional view of FIG.
The figure shows a plan view of another embodiment, but since it is vertically symmetrical with respect to line a in FIG. 1 and horizontally symmetrical with respect to line b, only the upper left side will be described.

In Figures 1 and 2, 1 is a bucket, 2 is a chain attached to both ends of the bucket 1 via chain brackets 3, and 4 is a roller with a solo pan-like appearance, which is installed upright on each chain bracket 3. It is attached to the roller shaft 5 so as to be rotatable. 6 is an upper guide rail, 7 is a lower guide rail, the upper guide rail 6 is fixed to the outside of the horizontal excavation section frame 8, and the lower guide rail 7 is supported by a sliding support shaft 10 via an intermediate member 9. There is. The FN dynamic support shaft 10 is slidably inserted into a sliding shaft bracket 11 suspended from the horizontally dug-out frame 8. In addition, since the lower guide rail 7 performs a so-called parallel ruler movement, a T-shaped protrusion 20 in cross section is provided slightly in the center with an intermediate member 9 interposed therebetween. 22 is fitted. 82211 is sliding rod 13
It is pivotally supported and connected to the drive cylinder 14 via.

The sliding rod 13 is slidably inserted into a sliding rod bracket 15 suspended from the horizontal excavation part frame 8.

The base of the drive cylinder 14 is pivoted to a cylinder bracket 16 suspended from the horizontal excavation part frame 8. Although not shown, the base of the drive cylinder on the right side in FIG. 1 is also pivoted to the cylinder bracket 16. ing. Also, 17 is a telescopic cylinder, 18 is an elevator post,
19 is a link, and 23, 23, . . . are sprockets of the chain 2.

Since this embodiment employs the above configuration, the following operations are performed. That is, [when used in the normal side excavation method] each bucket 1 in the horizontal excavation r11 guides the roller 4 with the upper and lower guide rails 6.7, and is restrained by the excavation part frame 8 while perpendicular to the plane of the paper in Figure 3. The excavating force applied to the bucket 1, excluding the traction force, is carried by the horizontal excavating part frame 8 through the rollers 4.

[When changing from the side excavation 1'nJ method to the catenary excavation method] The bucket elevator is stopped, and the horizontal excavation part frame 8 is pushed down via the link 19 by the expansion action of the telescopic cylinder 17. As a result, excessive tension is applied to chain 2,
The roller 4 is pressed against the upper guide rail 6, and then
When the wedge 21 is pulled due to the contraction action of the drive cylinder 14, the T-shaped groove 20 that is fitted in the T-shaped groove 22 moves toward the line a in the figure. As a result, both lower guide rails 7 also move closer to line a.Next, when the chain 2 is loosened due to the contraction action of the telescopic cylinder 17, the rollers 4 become free, and the horizontal excavation section frame 8
A catenary state occurs below .

[When changing from catenary excavation method to lateral excavation method]

As before, the bucket elevator is stopped and the horizontal excavation part frame 8 is pushed down by the telescopic cylinder 17 via the link 19. As a result, overtension is applied to the chain 2 and the roller 4 is pressed against the upper guide rail 6.
By pushing the wedge 21 due to the extension action of the drive cylinder 14, the T-study strip 20 moves in a direction away from line a in the figure. As a result, the lower guide rail 7 returns to the traveling line side of the rollers 4. Then, the pressure in the telescopic cylinder 17 is returned to the pressure in the normal side excavation method.

Note that in order to cause the lower guide rail 7 to perform a so-called parallel ruler movement, the mechanism shown in FIG. One end of 12 is pivoted, and link 1
The other end of 2 may be connected to a drive cylinder 14 via a sliding rod 13.

Although not shown, the lower guide rail 7 may be moved closer to or away from the sliding rod 13 shown in FIG. 4 by cutting a male thread into the sliding rod 13 and rotating a female thread that engages with the male thread.

In summary, since the present invention adopts the configuration described in the claims, the following effects are achieved.

〔Effect of the invention〕

To guide the rollers attached to both ends of the bucket and to divide the two guide rails facing each other at the back into an upper and lower guide rail, and to make the lower guide rail engage and separate from the rollers. Since they are moved close to each other and away from each other, it is possible to quickly change from the side excavation method to the catenary excavation method, or vice versa, depending on the excavation conditions, and as a result, the excavation section becomes a long turning section. In turn, excavation work can be made more efficient. In particular, in the side excavation method, the rollers are guided by upper and lower guide rails, so the downward and stacking loads that are applied during excavation are borne by these guide rails, which prevents excessive force from being applied to the chain. In addition, since only the lower guide rail is engaged and separated from the rollers, the strength of the movement mechanism is reduced and the mechanism can be diversified.

[Brief explanation of the drawing]

Figure 1 is a plan view of the main parts of this embodiment, the right side of Figure 2 is a cross-sectional view taken along line AA in Figure 1, the left side of Figure 2 is a cross-sectional view taken along line B-B in Figure 1, and Figure 3 is a cross-sectional view of the book. A schematic diagram of an unloader to which the embodiment is applicable;
FIG. 4 shows a plan view of another embodiment. 1... Bucket, 4... Roller, 6... Upper guide rail, 7... Lower guide rail.

Claims (1)

[Scope of Claims] A bucket elevator type continuous unloader capable of selectively using a side excavation method and a catenary excavation method, which includes rollers attached to both ends of the bucket, and a roller provided on the horizontal excavation part frame of the bucket elevator, It consists of a guide rail that guides and faces each other at the back and is divided into an upper and a lower part, and a mechanism that causes these facing lower guide rails to approach and separate from each other in order to engage and separate from the rollers. Bucket elevator type continuous unloader.