JPH1095536A - Twist chain type bucket unloader - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the weight of the vertical lifting part of an unloader and easily detect and control the turning direction thereof by providing an L-shaped bucket chain elevator having a chain line which can be twisted. SOLUTION: A drive sprocket 17 and a guide sprocket 18 of a bucket chain elevator 16 are disposed in an upper column 11 so that a bucket is turned upside down and moved down for a tilting boom. The connection side to the tilting boom 4 of a vertical lifting part 10 of a lower column 12 is a down-side and guide sprockets 19, 20, 21 are mounted to the lower end of the lower column 12 so that the down-side is parallel to the up-side thereof. A chain which can be twisted and is provided with buckets 16c constitutes a bucket chain line 16b so that a L-shaped digging part is protruded toward the tilting boom 4 side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torsion device capable of reducing the weight of an unloader, in particular, a vertical loading portion of the unloader, and enabling easy detection and control of the turning direction of the vertical loading portion. The present invention relates to a chain type bucket unloader.

[0002]

2. Description of the Related Art FIG. 7 is a cross-sectional side view of a main part for explaining the outline of a conventional unloader, and FIG. 8 is a plan view for explaining the unloading operation by the conventional unloader of FIG. In the figure, a traveling gantry 1 of an unloader is provided so as to be able to travel along a quay 2, and a pair of A-shaped turning frames 3 are mounted on the traveling gantry 1. An intermediate portion of the up / down boom 4 is pivotally supported on the A-shaped turning frame 3 by a horizontal shaft 5, and a boom up / down cylinder 6 is connected between the A-shaped turning frame 3 and the up / down boom 4. Undulating boom 4
The vertical unloading part 7 is supported at the tip of the vertical unloading part via a vertical unloading part supporting frame 8 of an L-shaped frame. A link mechanism 9 for always holding the vertical loading portion 7 in the vertical direction is connected between the upper end of the vertical loading portion support frame 8 of the L-shaped frame and the upper end of the A-shaped turning frame 3.

The vertical unloading section 7 has a vertical column 50. The vertical column 50 is supported on the L-shaped frame 8 via a rotation mechanism 51 so as to be able to rotate and drive as shown by an arrow 51a. The vertical unloading unit 7 includes a bucket chain elevator 52 that is endlessly connected to the inside of a vertical column 50 by a plate-shaped link chain line 52a circulating in an L-shape.
The bucket chain elevator 52 includes a rotary feeder 53 configured to pass through a position immediately below the upper reversing portion and receive loose loads.

At the lower end of the bucket chain elevator 52, movable frames 54, 5 provided outside the column 50 are provided.
The L-shaped bulk excavation part 52b is formed by 5, 56,
The L-shaped excavation part 52b is swung as indicated by arrows 60 and 61 by the chain tension holding cylinder 57 connected to the movable frame 54 and the swing cylinders 58 and 59 connected to the movable frames 55 and 56. Is possible. Guide sprockets 62 and 63 for the excavation part are supported at both ends of the movable frame 56.

On the boom 4, an on-machine conveyor 64 is provided in connection with the rotary feeder 53, and a hopper 65 is provided in the A-shaped frame 3. further,
A relay conveyor 66 is provided on the traveling gantry 1, and a ground conveyor 67 is connected to the relay conveyor 66.

[0006]

In the unloading operation of such a conventional unloader, the vertical unloading section 7 is operated by operating the up-and-down boom 4 from the traveling gantry 1 as shown in FIG. 69, and the L-shaped excavated portion 52b is laterally moved along the wall surface as shown by the arrow 70, and the column 50 is turned by 90 ° at the corner, and this is repeated by 360 ° or more in the same direction. Make a turn.

For this reason, in order to transfer loose loads from the upper part of the revolving column 50 to the undulating boom 4 side, the rotary feeder 53 is used.
And a slip ring is required to supply driving power to the rotating column 50, and a hydraulic unit for each hydraulic cylinder used on the vertical loading unit 7 side is mounted on the column 50. As a result, there is a problem that the weight of the vertical unloading portion 7 increases, and the weight of the unloader main body-side structure such as the hoisting boom 4, the A-shaped turning frame 3, and the traveling gantry 1 increases. In addition, since the column 50 is turned 360 ° or more with respect to the up-and-down boom 4, the detection of the azimuth of the column 50 with respect to the up-and-down boom 4 and the control operation for changing the azimuth become complicated, and there is a problem that it becomes difficult.

Accordingly, the present invention is directed to a torsion chain type bucket unloader capable of reducing the weight of the vertical unloading part of the unloader and easily detecting the turning direction of the vertical unloading part and controlling the operation. It is intended to provide.

[0009]

In order to achieve the above object, a torsion chain type bucket unloader according to the present invention has a vertical unloading part mounted at the tip of an up-and-down boom via a vertical unloading part support frame, The vertical unloading unit is fixedly supported by the vertical unloading unit support frame and forms an upper column that forms an upper part of the elevator column, and forms a lower part of the elevator column and forms a lower part of the upper column relative to the upper column. A lower column rotatably supported about a vertical center line, a driving means for rotating the lower column forward and reverse around the vertical center line relative to the upper column, and supported in the upper column Facing at least the raised boom of the upper column via at least the upper sprocket and the lower sprocket supported in the lower column. Lowered Cyclic the side, and a L-shaped bucket chain elevator having a torsional fluctuations capable hung passed Cheng line to the vertical center line around with the aforementioned pivoting movement of the lower column.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 shows a cross-sectional side view of a main part of a vertical loading unit of a torsion chain type bucket unloader according to an embodiment of the present invention. In the drawings, the same elements as those in the related art are denoted by the same reference numerals as those in FIGS. 7 and 8, and redundant description will be omitted.

In FIG. 1, reference numeral 10 denotes a vertical discharge unit having the structure of the present invention, and reference numeral 11 denotes a vertical discharge unit 1 fixedly supported on a vertical discharge unit support frame 8 constituted by an L-shaped frame.
Reference numeral 12 denotes an upper column, and 12 denotes a swivel connection unit 13 at the lower end of the upper column 11 and a swivel driving means 1 provided on the upper column 11 side.
4 is a lower column supported at its upper end so as to be horizontally rotatable in both forward and reverse directions about a vertical center line of the upper column 11. Upper column 11 and lower column 1
2 is preferably configured to have a cross section close to a circle in order to accommodate the bucket chain elevator 16 that fluctuates torsion as described later.

The upper column 11 is integrally provided with a chute 15 which faces the upper surface of the tip of the on-machine conveyor 64 on the hoisting boom 4. Inside the upper column 11,
Drive sprocket 17 of bucket chain elevator 16
The guide sprocket 18 and the guide sprocket 18 are arranged such that the direction of rotation thereof is such that the direction of reversal falls toward the up-and-down boom side. On the other hand, in the lower column 12, as shown in FIG. 1, the connecting side of the vertical unloading section 10 to the hoisting boom 4, that is, the side of the bucket chain elevator 16 facing the hoisting boom 4, is defined as the descending side, and the descending side is the opposite side. Under the arrangement relation parallel to the ascending side, three guide sprockets 19 at the lower end of the bucket chain elevator 16 are provided at the lower end.
20 and 21 are mounted.

Further, the bucket chain elevator 16 has an L-shaped excavated portion 16a of the bucket chain elevator 16.
So as to protrude toward the undulating boom side,
55, 56, a cylinder 57 for maintaining chain tension,
Oscillating cylinder 58 of L-shaped excavation part 16a and L-shaped excavation part 1
Guide sprockets 62 and 63 for 6a are provided, and a bucket chain line 16b of the bucket chain elevator 16 is configured by using a chain with a bucket 16c and a torsional variation.

FIG. 2 is an enlarged detailed view of a portion II in FIG. 1, and FIG. 3 is a front view of a guide sprocket as viewed from arrows III to III in FIG.
FIG. 4 is a front view of the chain guide taken along the line IV-IV in FIG. In the figure, the bucket chain line 16b
The figure shows a case in which a chain line of a well-known oval link made of, for example, a cast is used as a chain that causes torsional fluctuation, instead of a conventional plate-shaped link chain. 2 and 3, the guide sprocket 19 is formed with a fitting groove 19a having a shape matching the oval link so as to mesh with the bucket chain line 16b.

In FIGS. 2 and 4, a chain guide 22 is fixed to the lower column 12 so as to face the guide sprocket 19 and prevent the chain of the bucket chain line 16b from dancing when the chain twists. . The chain guide 22 is formed with a straight groove 22a for receiving a semicircular link portion of the chain protruding from the sprocket 19 side, and the end of the groove 22a allows the link portion to be smoothly introduced. It has a shape that is expanded. As shown in FIG. 1, a similar chain guide 22 is provided for the driving sprocket 17 and the other guide sprockets 18 and 21.

FIG. 5 is a cross-sectional side view of a main part in a state where the lower column 12 is horizontally rotated by 180 ° from the state of FIG. 1 around the vertical center line of the upper column 11 when unloading loose loads from the ship 68. FIG. 6 is a plan view showing the unloading state performed under the state shown in FIG.

According to the chain line 16b shown in FIG. 2, the range of the distance from the upper drive sprocket 17 and the guide sprocket 18 to the lower guide sprockets 19 and 21 according to the size of the vertical unloading part 10 is determined. It is possible to obtain a torsional variation of the bucket chain elevator 16 within the range of 180 ° to 240 °.

In FIG. 5, when the lower column 12 is horizontally rotated about the vertical center line of the upper column 11 from the state of FIG. 1 as shown in FIG. A bucket chain line 16b having a downwardly facing bucket 16c facing the side,
It is almost horizontal at the middle part, and the lower guide sprocket 1
At the position 9, the chain guide 22 guides it to the opposite side and twists and turns in a helical manner, descends, and descends.
, Excavates and scrapes loose loads in the direction opposite to the up-and-down boom 4, rises from the rear side of the L-shaped excavated portion 16 a, spirally circulates upward from the guide sprocket 21 and enters the drive sprocket 17, The unloading operation can be performed so that the bulk load is reversed and discharged into the chute 15.

Referring to FIG. 6, the vertical unloading part 10 is first inserted into the hold 68 of the ship 68 by the undulating boom 4 extending from the traveling platform 1 of the unloader.
a at the appropriate unloading start position 23.
From the position directly below, to one side (for example, counterclockwise), for example, at 45 ° until it is perpendicular to the cargo hold wall surface, descend to the level where it contacts the bulk load, adjust the excavation part reach, and from this position, the bucket chain elevator The operation of the unloading work by No. 16 is started.

As the bucket chain elevator 16 circulates, the L-shaped excavation section 16a is moved to the hold 69 as shown by the arrow a.
While maintaining at right angles to the wall surface, move laterally along the wall surface and carry out the unloading operation, rotate the L-shaped excavated portion 16a counterclockwise by 90 ° as shown by the arrow b at the corner position, and Further, the unloading operation proceeds to the diagonal position of the unloading start position 23 as indicated by arrows a and b. At this diagonal position, the L-shaped excavated portion 16a is once pulled backward and slightly raised, and the lower column 12 is horizontally rotated 360 ° in the opposite direction about the vertical center line of the upper column 11 as shown by arrow c. After returning to the original position, the corner portion is turned by 90 ° as indicated by arrow b, and the unloading operation is continued again as indicated by arrows a and b. The unloading operation that makes a round in the hold 69 in the horizontal direction can be performed by forward and reverse horizontal rotations of approximately 180 ° to the left and right starting from the lower position. Thereafter, the same unloading operation can be repeatedly performed by lowering the vertical unloading unit 10 by the bucket depth.

According to this configuration, on the upper column 11 side of the vertical loading section 10 fixedly supported on the L-shaped frame 8, the bucket chain elevator 16 constantly unloads loose loads toward the hoisting boom 4, and on the lower column 12 side. , Lower column 1
With the horizontal rotation of 2, the L-shaped excavating portion 16a scrapes and unloads the bulk load on the side opposite to the undulating boom 4, so that there is no need to provide a rotary feeder on the upper side of the bucket chain elevator 16 as in the related art, and At the same time, there is no need to use a slip ring to supply power to the vertical unloading unit 10.
In addition, since the lower column 12 is used by rotating the upper column 11 forward and backward within a predetermined horizontal angle range, there is no need to mount a hydraulic unit for a hydraulic cylinder on the vertical unloading unit 10, and The weight of the unloading section 10 can be significantly reduced. Further, by reciprocating the lower column 12 side forward and backward with the lower position of the up-and-down boom 4 as a starting position, it becomes easy to detect the azimuth angle of the L-shaped excavation portion 16a, and the position of the L-side excavation portion 16a This has the effect of facilitating alignment control.

[0022]

As described above, according to the torsion chain type bucket unloader of the present invention, the following effects can be obtained. (1) It has a vertical unloading part attached to the tip of the hoisting boom via a vertical unloading part support frame, and the vertical unloading part is fixedly supported by the vertical unloading part support frame and constitutes an upper part of the elevator column. An upper column, a lower column that constitutes a lower portion of the elevator column, and is supported to be rotatable around a vertical center line of the upper column relative to the upper column; The driving means for turning forward and backward relatively around the vertical center line relative to the upper sprocket supported in the upper column and the lower sprocket supported in the lower column. Circulate down on the side of the upper column facing the undulating boom,
An L-shaped bucket chain elevator having a chain line that is wrapped around the center line in the vertical direction so as to be capable of torsional variation along with the turning movement of the lower column. There is no need to provide a rotary feeder to the vertical loading section, and there is no need to use a slip ring to supply power to the vertical unloading section. By rotating and using, there is no need to mount a hydraulic unit for a hydraulic cylinder on the vertical unloading unit, and the weight of the vertical unloading unit can be significantly reduced. The azimuth angle of the L-shaped excavation portion of the L-shaped bucket chain elevator is reciprocated by reciprocating in the forward and reverse directions with the lower position of the undulating boom as a starting position. Detection is facilitated, the control operation for the alignment of the L-shaped drilling unit can be easily performed (claim 1).

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view of a main part of a vertical loading unit of a torsion chain type bucket unloader according to an embodiment of the present invention.

FIG. 2 is an enlarged detailed view of a main part of a part II in FIG. 1;

FIG. 3 is a front view of the guide sprocket as viewed from arrows III to III in FIG. 2;

FIG. 4 is a front view of the chain guide taken along the line IV-IV in FIG. 2;

FIG. 5 is a perspective view showing a state in which the lower column of the vertical unloading section of the torsion chain type bucket unloader of FIG. 1 is moved from the state of FIG.
It is principal part sectional side view in the state which rotated 80 degrees horizontally.

FIG. 6 is a plan view of the unloading state performed by the torsion chain type bucket unloader of FIG. 1 under the state as shown in FIG. 5;

FIG. 7 is a cross-sectional side view of a main part for describing an outline of a conventional unloader.

8 is a plan view for explaining the unloading operation by the conventional unloader of FIG. 7;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Unloader traveling stand 2 Wharf 3 A type revolving frame 4 Raised boom, 5 Horizontal axis 6 Boom raised / lowered cylinder 7, 10 Vertical loading unit 8 Vertical loading unit support frame composed of L-shaped frame 9 Link mechanism 11 Upper column 12 Lower part Column 13 Swivel connection part 14 Swing drive means 15 Chute 16 Bucket chain elevator 16a L-shaped excavation part 16b Bucket chain line with variable torsion 16c Bucket 17 Drive sprocket 18, 19, 20, 21 Guide sprocket 22 Chain guide 23 Unloading start position 54 , 55, 56 Movable frame 57 Tension holding cylinder 58, 59 Swing cylinder 60, 61 Arrow indicating swing direction 62, 63 Guide sprocket for digging part 64 Onboard conveyor on undulating boom 68 Ship 69 Hold a, b, c Operation direction of L-shaped excavation part

Claims (1)

[Claims] 1. A vertical unloading unit mounted on a tip of an up-and-down boom via a vertical unloading unit support frame, and the vertical unloading unit is fixedly supported by the vertical unloading unit support frame to form an upper part of an elevator column. An upper column, a lower column that constitutes a lower portion of the elevator column, and is supported to be rotatable around a vertical center line of the upper column relative to the upper column; A driving means for turning forward and backward around the vertical center line relative to the column, and at least via an upper sprocket supported in the upper column and a lower sprocket supported in the lower column. Descending and circulating on the side of the upper column facing the undulating boom, and around the vertical centerline with the turning movement of the lower column. A torsion chain type bucket unloader, comprising: an L-shaped bucket chain elevator having a chain line that is wrapped around torsional variation.