JPH089207Y2 - Skip conveyor - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a skip conveyor for conveying asphalt mixture to a silo in an asphalt plant.

[0002]

2. Description of the Related Art In a conventional skip conveyor, a sheave is fixed to a frame (for example, an actual open shovel 60).
-45708 gazette).

[0003]

In the conventional skip conveyor, since the sheave is fixed to the frame, the relative contact position between the wire and the sheave is constant. Therefore, when the skip bucket starts to climb and when the maximum velocity of descent is applied, a particularly large load is applied to the wire.
At this time, the wire portion in contact with the sheave becomes constant and the portion is severely damaged. That is, the durability time of the wire is short, which also causes an accident.

Therefore, a method of reducing the force applied to the wire by reducing the moving speed of the skip bucket to prevent damage to the wire is conceivable, but the work efficiency is reduced.
Can not.

Therefore, it is possible to prevent accidents by regularly replacing the wire, but it is difficult to freely replace the wire because the skip bucket is fixed to the end of the wire. The replacement takes about half a day and a lot of labor and cost. Therefore, it is necessary to reduce the number of wire replacements as much as possible.

Although it is possible to increase the diameter of the sheave to increase the bending angle of the wire at the sheave portion, it is also possible to increase the diameter of the sheave with a limited space. There is a limit (if the sheave diameter is too large, the skip bucket cannot move up and down over the sheave). Since there is a limit to increasing the sheave diameter, there is also a limitation to thickening the wire itself (the sheave diameter is preferably 25 to 30 times the wire diameter).

The present invention has been made in view of the above circumstances, and it is an object of the present invention to improve the durability of a wire without lowering work efficiency.

[0008]

In order to achieve the above object, the skip conveyor of the present invention guides the winch for raising and lowering the skip bucket, the skip bucket fixed to the end of the wire, and the skip bucket. Frame
In a skip conveyor comprising a frame and a plurality of sheaves provided at predetermined intervals on the frame,
At least one of the bushes is a movable sheave having a variable position in contact with the sheave of the wire when the skip bucket is at a specific position.

The movable sheave is fixed to the frame with a pin via a swing link, and a pneumatic cylinder or the like is connected to the opposite side of the swing link.

[0010]

The skip conveyor of the present invention can change the wire portion in contact with the sheave when the wire is subjected to a particularly large load by using the above-described structure, and the same portion of the wire is always maintained. It is possible to avoid severe damage and increase the durability of the wire.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic diagram of a skip conveyor. The asphalt mixture mixed by the mixer-1 is conveyed by the trolley bucket 2 to the start / stop position of the skip bucket 3, and the asphalt mixture in the trolley bucket 2 is discharged into the skip bucket 3.

The skip bucket 3 is fixed to the end of the wire 4, and the wire 4 is moved by the winch 5 to about 50 m / mi.
It is operated at a speed of n. As the wire 4 is wound up by the winch 5, the skip bucket 3 which has received the asphalt mixture from the trolley bucket 2 is guided by the rail (see FIG. 2) provided on the frame 6 and is located above the silo 7. When it comes, it hits the stopper provided on the rail, the limit switch is turned on, the skip bucket 3 stops, and the lid (see FIG. 2) provided on the upper part of the silo 7 opens, and the skip bucket 3 is provided on the lower part. The opened gate is opened and the asphalt mixture is discharged from the skip bucket 3 to the silo 7.

When the discharge to the silo 7 is completed, the limit switch is turned on, the skip bucket 3 starts descending, the winch 5 in turn conversely feeds out the wire 4, and the skip bucket 3 descends to the start / stop position of the skip bucket 3. To do. After that, the same operation is repeated.

FIG. 2 is a perspective view of the skip conveyor (sheaves and wires are not shown). Lid 9 on top of silo 7
Is provided, the skip bucket 3 is provided with wheels 3a, and the skip bucket 3 is shown to be guided by a rail provided on the frame 6.

FIG. 3 is an enlarged view of the essential parts of an embodiment of the present invention. The wire 4 is made by twisting a large number of steel wires together, and is a sheath provided on the frame 6 at predetermined intervals.
It is designed to be guided by the protrusions 8a, 8b, 8c. Conventionally, sheaves 8a, 8b, 8c are fixed to the frame 6, but in order to increase the durability of the wire 4, the relative positions of the sheaves 8a, 8b, 8c with the frame 6 are changed. The wire 4 is moved and the relative contact position between the wire 4 and the sheaves 8a, 8b, 8c is changed. However, sheaves 8a, 8
The positions b and 8c are changed within a range that does not interfere with the trajectory of the wire.

FIG. 4 shows the sheave 8 (sheaves 8a, 8 of FIG. 3).
An example is shown in which the relative position of the frame (b, 8c) with respect to the frame 6 is moved. The sheave 8 is connected to the frame 6 by a pin 11 via a swinging link 10 so that the sheave 8 can move in an arc shape around the pin 11. Swing link 10
The side opposite to the sheave is connected to a pneumatic cylinder-12, and the center of the sheave 8 can be moved from the position to by the operation of the pneumatic cylinder-12.

The pneumatic cylinder 12 may be replaced with a hydraulic cylinder or an electric cylinder. Further, it is possible to stop the pneumatic cylinder etc. at an arbitrary intermediate position in the middle of the entire stroke by a known technique.
It is also possible to stop the knob 8, and it is more effective if an intermediate position stop is added.

The timing for moving the sheave 8 may be a method of detecting the operating time of the skip conveyor at regular intervals, or a method of raising or lowering the skip bucket 3, and an electric timer or counter. -By
You can decide when to move.

FIG. 5 shows the sheave 8 (sheaves 8a, 8 of FIG. 3).
Another embodiment is shown in which the relative positions of b and 8c) with the frame 6 are moved. A long hole 13 is formed in the frame 6 in the longitudinal direction.
And the bolt 14 is guided by the long hole 13
You can move inside. Pneumatic cylinder-12
By the operation of, the sheave 8 can move in the direction of the arrow. By adjusting the air pressure of the pneumatic cylinder-12,
The hook 8 can be fixed at any position. The pneumatic cylinder may be replaced with a hydraulic cylinder or an electric cylinder as in the above-described embodiment. Also, the timing for moving the sheave 8 can be determined by the same method as in the above-described embodiment.

In the above embodiment, the example of the skip conveyor using three sheaves 8 is shown.
It goes without saying that the present invention can also be applied to a skip conveyor having more than three. Further, in the above embodiment,
Two examples of moving the relative positions of the sheave 8 and the frame 6 have been shown, but the present invention is not limited to these.
Any mechanism can be used as long as the relative position between the sheave 8 and the frame 6 can be moved. For example, the sheave 8 may be detachably fixed to the frame 6, or the link mechanism described in a textbook of mechanics may be used.

[0021]

As described in detail above, in the skip conveyor of the present invention, since the sheave fixed to the frame is movable, the relative movement between the wire and the sheave is prevented. By periodically changing the contact position, it is possible to prevent the wire from being locally damaged by changing the part of the wire that is in contact with the sheave when a particularly large load is applied to the wire. It has an excellent effect that the time can be lengthened.

Further, in the skip conveyor of the present invention, the sheave is moved by using a pneumatic cylinder or the like, but the pneumatic cylinder or the like stops at an arbitrary position in the middle of the entire stroke. Therefore, it also has an excellent effect that the moving position of the sheave can be arbitrarily selected.

[Brief description of drawings]

FIG. 1 is a schematic view of a skip conveyor.

FIG. 2 is a perspective view of a skip conveyor.

FIG. 3 is an enlarged view of a main part of the embodiment of the present invention.

FIG. 4 is a schematic view showing an embodiment of moving the relative positions of the sheave and the frame of the present invention.

FIG. 5 is a schematic view showing an embodiment in which the relative positions of the sheave and the frame of the present invention are moved.

[Explanation of symbols]

 1 Mixer 3 Skip Bucket 4 Wire 5 Winch 6 Frame 7 Silo 8 Sheave 10 Swing Link 11 Pin 12 Pneumatic Cylinder 13 Long Hole 14 Bolt

Claims (2)

[Scope of utility model registration request] 1. A winch for raising and lowering a skip bucket by winding and lowering a wire, a skip bucket fixed to an end of the wire, a frame for guiding the skip bucket, and a predetermined frame for the frame. In a skip conveyor composed of a plurality of sheaves provided at intervals, at least one of the sheaves is in contact with the sheave of the wire when the skip bucket is in a specific position. A skip conveyor characterized by a variable moveable sheave. 2. The movable sheave is characterized in that it is fixed to the frame with a pin via a swing link, and a pneumatic cylinder or the like is connected to the side opposite to the sheave of the swing link. The skip conveyor according to claim 1.