Charging apparatus and method for charging a mixing vessel with bulk material

Abstract

The invention relates to a charging apparatus which is intended for bulk material and has a charging bin (20), which can be pivoted on a mixing vessel (12) between a receiving position and a discharging position for the bulk material, the discharging position opening out into the mixing vessel (12) from above, and also has a scraper bucket (22), which can be moved in the direction of the charging bin (20), preferably by means of a pulling cable (26), thereby receiving bulk material, and in the receiving position can be emptied into the charging bin (20). According to the invention, it is proposed that the charging bin (20) should have a holding mechanism (28) for the scraper bucket (22), wherein the scraper bucket (22), which can be brought into engagement with the holding mechanism (28), is prevented from falling when the charging bin (20) is being pivoted.

Description

[0001] Feeding device and method for feeding a mixing vessel with bulk material

[0002] Description

[0003] The invention relates to a feeding device for bulk material, in particular for building materials such as sand, gravel, and fine concrete, comprising a feeder bucket pivotable on a mixing vessel between a receiving position and a discharge position for the bulk material opening into the mixing vessel from above, and a scraper bucket that can be moved toward the feeder bucket, preferably by means of a pull rope, while receiving the bulk material and can be emptied into the feeder bucket in the receiving position. The invention further relates to a corresponding feeding method.

[0004] A feeding device of this type is known from DE 102010031648 A1. This document deals with a simpler handling during the feeding process, in which a scraper bucket is pulled by an operator using a cable winch over a pile of mix and then emptied into a filling opening of the feeder hopper. After filling with several bucket loads, the feeder hopper is hydraulically pivoted into the discharge position, and the bulk material is discharged into the mixing vessel under the influence of gravity.

[0005] When tilting the feeder bucket to fill the mixing vessel, the scraper bucket typically remains in the pile of mix. Failure to pay attention to the position of the scraper bucket and the pull rope, which often happens in practice, can lead to damage to the feeder bucket and the pull rope. If the pull rope is pulled over the edge of the feeder bucket when lifting it, the feeder parts and the pull rope will be damaged. When lowering the feeder bucket, there is a risk of damage to the pull rope by becoming trapped under the feeder bucket.

[0006] Based on this, the invention is based on the object of further improving the loading devices and methods known in the prior art and of ensuring a reduced risk of wear and damage during the loading process with simple means and low handling effort.

[0007] To solve this problem, the combination of features specified in patent claims 1 and 12 is proposed. Advantageous embodiments and further developments of the invention are set forth in the dependent claims.

[0008] The invention is based on the idea of ​​preventing damage during the loading process by mounting the scraper bucket on the feeder bucket. Accordingly, the invention proposes that the feeder bucket have a holder for the scraper bucket, wherein the scraper bucket, which can be engaged with the holder, is secured against falling off in the engaged position when the feeder bucket is pivoted. In this way, the scraper bucket can be easily positioned outside the work area and returned to its operational position without fear of damage during handling.

[0009] To further reduce handling effort while ensuring reliable positioning, it is advantageous if the holder has a concave support contour for loosely hanging the scraper blade. A further improvement in this regard is achieved if the holder comprises at least one hook element, preferably two spaced-apart hook elements.

[0010] For a form-fitting support, it is advantageous if the at least one hook element is designed as an arcuately curved sheet metal part.

[0011] Positioning can be further improved by attaching the bracket to a housing part or guide part for the pull rope on the feeder bucket.

[0012] A structurally simple design provides for the scraper bucket to be inserted into the holder using a rod section.

[0013] It is advantageous if the rod part is formed by a cross member running between the handles of the scraper bucket.

[0014] For advantageous storage, it is advantageous if the scraper bucket inserted into the holder rests with its bucket part over a filling opening of the feeder bucket.

[0015] To further simplify positioning, it is advantageous if the scraper bucket with its bucket recess is facing the feeder bucket during the feeding process.

[0016] Advantageously, the feeder bucket can be pivoted between the lowered receiving position and the raised discharge position by means of a preferably hydraulic pivot drive. The invention also relates to a mixer with a mixing vessel containing a mixing mechanism and a feeding device according to the invention.

[0017] In terms of the method, to achieve the aforementioned problem, it is proposed that the scraper bucket be fixed in a holder on the feeder bucket when filling the mixing vessel, whereby the scraper bucket is secured against falling off when the feeder bucket is pivoted. This allows the aforementioned advantages to be achieved in a similar manner.

[0018] A preferred measure is for the scraper bucket to be loosely suspended in the holder and supported therein under the influence of gravity.

[0019] According to a further advantageous embodiment, the scraper bucket is brought into engagement with the holder in a tilting movement, wherein a bucket edge of the scraper bucket striking the feeder bucket forms a tilting axis.

[0020] The invention will be explained in more detail below using an exemplary embodiment shown schematically in the drawing. In the drawings:

[0021] Fig. 1 shows a loading device on a mixing vessel in a receiving position in side view;

[0022] Fig. 2 ; the loading device in a dispensing position in perspective view

[0023] Fig. 3 is a detailed enlargement of Fig. 2; and Fig. 4 is the detailed enlargement of Fig. 3 in side view.

[0024] The mixer 10 shown in the drawing comprises a mixing vessel 12 with a pressure-tight, sealable filling opening 14 and a motor-driven mixer 16, as well as a loading device 18 for bulk materials, such as a screed mix, associated with the mixing vessel. The loading device 18 comprises a feeder bucket 20 and a scraper shovel 22, which can be pulled over a pile of bulk material (not shown) by means of a cable winch 24 and traction cable 26, while picking up the bulk material, toward the feeder bucket 20. A special feature is a holder 28 for the scraper shovel 22, attached to the feeder bucket 18. Its function during the loading process is explained in more detail below.

[0025] As shown in Figs. 1 and 2, the feeder bucket 20 is pivotally connected to the mixing vessel 12 about a horizontal pivot axis 30. The pivoting movement can be accomplished mechanically by means of a hydraulic cylinder 32, only indicated in Fig. 1. Fig. 1 shows the feeder bucket 20 in a lowered receiving position for the bulk material, while Fig. 2 shows a raised discharge position in which the bulk material can be emptied under the influence of gravity via a hopper 34 of the feeder bucket 20 into the filling opening 14 of the mixing vessel 12.

[0026] The scraper bucket 22 has a bucket section 36 and a linkage 38 with handles 40 for manual handling by an operator. The supporting cable winch 24 can be controlled via a remote control device (not specifically shown) arranged on a handle 40. The bucket section 36 can thus be moved over a filling opening 42 of the feeder bucket 20 to a discharge position in the area of ​​a stop 44 and tipped while discharging the bulk material. The bucket tip 46 can slide downward from the stop position on slide rails 48 above the filling opening 42 and can thus be completely emptied. In the opposite direction, the scraper bucket 22 can be retracted back over the pile of bulk material by pulling the pull cable 26 in a freewheeling motion of the cable winch 24. A few shovel loads are sufficient to fill the mixing vessel 12, with typically a few ten fillings taking place per working day.Accordingly, the scraper bucket 22 and the pull rope 26 must be operated frequently.

[0027] In order to make work easier here, the scraper bucket 22 can be brought into engagement with the holder 28 so that it is fixed on the feeder bucket 20 during tilting and lowering and can thus remain on the feeder bucket 20 during these operations to avoid damage.

[0028] The scraper bucket 22 can conveniently be suspended from the holder 28 by means of a crossbar 50 (Fig. 2) extending between the handles 40. This process can be carried out without any special positioning effort by further tilting the scraper bucket 22 from the discharge position. The bucket part 36 then rests on the slide rails 48 above the filling opening 42, with the bucket trough 52 facing the feeder bucket 20 from the emptying position.

[0029] As best seen in the detailed illustrations of Figs. 3 and 4, the holder 28 is formed by two laterally spaced-apart hook elements 54. These are axially attached to the guide rollers 56 for the traction cable 26 on the feeder bucket 20 and, due to their arcuate curvature, form a concave support contour 58 into which the cross member 50 can be loosely inserted. In the upwardly projecting discharge position of the feeder bucket 20, the scraper bucket 22 is then supported under the influence of gravity and simultaneously secured against accidental falling off.

Claims

Patent claims 1. A feeding device for bulk material, in particular for building materials such as sand, gravel, fine concrete, with a feeder bucket (20) which can be pivoted on a mixing vessel (12) between a receiving position and a discharge position for the bulk material opening into the mixing vessel (12) from above, and with a scraper bucket (22) which can be moved towards the feeder bucket (20) while receiving bulk material, preferably by means of a pull cable (26), and can be emptied into the feeder bucket (20) in the receiving position, characterized in that the feeder bucket (20) has a holder (28) for the scraper bucket (22), wherein the scraper bucket (22) which can be brought into engagement with the holder (28) is secured against falling off when the feeder bucket (20) is pivoted.

2. Feeding device according to claim 1, characterized in that the holder (28) has a concave support contour (58) for loosely hanging the scraper shovel (22).

3. Feeding device according to claim 1 or 2, characterized in that the holder (28) comprises at least one hook element (54), preferably two hook elements (54) spaced apart from one another.

4. Feeding device according to one of claims 1 to 3, characterized in that the at least one hook element (54) is designed as an arcuately curved sheet metal part.

5. Feeding device according to one of claims 1 to 4, characterized in that the holder (28) is attached to a housing part or guide part (56) for the pulling cable (26) on the feeder bucket (20).

6. Feeding device according to one of claims 1 to 5, characterized in that the scraper shovel (22) can be inserted into the holder (28) with a rod part (50).

7. Feeding device according to claim 6, characterized in that the rod part (50) is formed by a cross member running between handles (40) of the scraper shovel (22).

8. Feeding device according to one of claims 1 to 7, characterized in that the scraper shovel (22) inserted into the holder (28) rests with its shovel part (36) over a filling opening (42) of the feeder bucket (20).

9. Feeding device according to one of claims 1 to 8, characterized in that during the feeding process the scraper shovel (22) with its shovel recess (52) faces the feeder bucket (20).

10. Feeding device according to one of claims 1 to 9, characterized in that the feeder bucket (20) can be pivoted between the lowered receiving position and the raised discharge position by means of a preferably hydraulic pivot drive (32).

11. Mixer with a mixing vessel (12) containing a mixing mechanism (16) and a feeding device (18) according to one of the preceding claims.

12. Method for feeding a mixing vessel (12) with bulk material, in particular with building materials such as sand, gravel, fine concrete, in which a feeder bucket (20) which can be pivoted on the mixing vessel (12) is filled with the mixed material in a receiving position by means of a scraper bucket (22) and is emptied into the mixing vessel (12) in an upwardly discharge position, characterized in that the scraper bucket (22) is fixed in a holder (28) on the feeder bucket (20) when the mixing vessel (12) is filled, the scraper bucket (22) being secured against falling off when the feeder bucket (20) is pivoted.

13. Method according to claim 12, characterized in that the scraper blade (22) is loosely suspended in the holder (28) and supported therein under the influence of gravity.

14. Method according to claim 12 or 13, characterized in that the scraper bucket (22) is brought into engagement with the holder (28) in a tilting movement, wherein a bucket edge (46) of the scraper bucket (22) abutting against the feeder bucket (20) forms a tilting axis.

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