JP3435738B2 - Conveyor scraper device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scraper device for a conveyor, which sorts a conveyed product on a conveyor belt to the left and right and unloads it, and more particularly to a scraper device for a conveyor which prevents spillage.

[0002]

2. Description of the Related Art A scraper device a shown in FIGS. 11 to 13 is known as a mechanism for unloading a conveyed product (loose product) on a conveyor belt. As shown, this scraper device a
Is an upper scraper d which is arranged above the conveyor belt b at a predetermined distance from the upper surface of the belt b and which distributes the conveyed product c on the belt b to the left and right; It is composed of a lower pressing member e that presses the upper surface of the belt b against the upper scraper d by pushing it up.

When unloading the article c on the conveyor belt b, the lower pressing member e is pushed up to lift the conveyor belt b flat by the roller group f, and the upper surface of the belt b is brought into contact with the upper scraper d. Let This allows
The conveyed product c on the belt b is distributed right and left by the upper scraper d formed in a triangular shape, and is unloaded to a hopper (not shown) below the lower pressing member e.

[0004]

By the way, in such a scraper device a, when the lower pressing member e is lowered to stop (turn off) the unloading, as shown in FIG. A flat gap g is temporarily created between d and the upper surface of the belt b. Since the conveyed product c is evenly placed on the flat belt b by the upper scraper d, the conveyed products c at the left and right ends of the belt b are likely to drop as the belt b advances. Further, the transported article c that has fallen to the floor and has been scattered must be cleaned.

As a countermeasure against this, the load (conveyed object c) is once cut in the state shown in FIG. 12, and the lower pressing member e is lowered after the conveyed object c is no longer on the belt b, but the load c is cut one by one. This deteriorates the operating efficiency of the conveyor.

If the lower pressing member e is pressed to flatten the conveyor belt b during unloading, the movement of the belt b becomes unstable and the belt b tends to meander.

An object of the present invention, which was devised in view of the above circumstances, is to provide a scraper device for a conveyor which prevents spillage of the load when the scraper device is turned off.

[0008]

In order to achieve the above-mentioned object, the present invention provides a triangular main scraper above a conveyor belt, which sorts a conveyed material on the belt left and right at a predetermined distance from the upper surface of the belt. , A conveyor scraper device provided with a push-up member that pushes the belt flat below the conveyor belt to press the upper surface of the belt against the main scraper. It is characterized in that it is provided with a sub-scraper having a guide surface that is in contact with the end portion and pushes away the conveyed articles on the left and right end portions except the central portion to the left and right to unload the conveyed articles.

Further, trough type guide rollers for guiding the conveyor belt may be provided before and after the main scraper and the sub scraper.

[0010]

According to the above construction, when the push-up member is moved down, the transported material passing through the gap between the main scraper and the belt is
The main scraper makes it even on a flat belt. Here, the conveyed items on the left and right ends of the belt are
The secondary scraper provided on the downstream side of the main scraper unloads left and right. Therefore, the conveyed product remains only on the central portion on the belt, and thereafter the load does not spill (fall) as the belt advances.

Guide rollers provided before and after the main scraper and the auxiliary scraper guide the conveyor belt in a trough shape, and prevent the belt from meandering flattened by being sandwiched between the main and auxiliary scrapers and the push-up member. To do.

[0012]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows an overall view of a belt conveyor provided with a scraper device according to this embodiment. As shown in the figure, a conveyor belt 3 is endlessly stretched between a drive pulley 1 and an idle pulley 2 which are arranged at a predetermined distance, and a conveyed product 4 (such as coal or the like) supplied from one end thereof is supplied. The scraper device 5 provided in the middle of the
By turning on and off, the desired bunker 6 can be unloaded.

The scraper device 5 is shown in FIGS. As shown in the figure, a main scraper 7 is provided above the conveyor belt 3 so as to separate the conveyed articles 4 on the belt 3 from the upper surface of the belt 3 to the right and left. The main scraper 7 is formed in a triangular plate shape that is sharp in the conveying direction of the conveyor belt 3, and is fixed to a frame (not shown) provided in the vicinity of the conveyor belt 3 to fix the belt 3 to the belt 3.
The distance L from the upper surface does not change.

On the downstream side of the main scraper 7, an auxiliary scraper 8 is provided.
Is provided. The sub scraper 8 is formed in a triangular plate shape like the main scraper 7, and its apex 9 is pivotally supported by the frame. Further, a rod 11 is provided on the bottom portion 10 of the auxiliary scraper 8, and the end portions of the rod 11 are guided by guide brackets 12 provided upright on the left and right of the belt 3. Guide bracket 12
Is made of an L-shaped material, one surface 12a of which supports the cutting force applied to the auxiliary scraper 8 and the other surface 12b of which guides the bottom portion 10 of the auxiliary scraper 8 up and down.

According to this structure, the auxiliary scraper 8 has the bottom portion 10 freely inclined by its own weight with the apex 9 of the auxiliary scraper 8 as a pivot point. Here, the inclination angle of the sub scraper 8 is regulated to a predetermined angle by the stopper 13 provided at the lower portion of the guide bracket 12. In other words, in the auxiliary scraper 8, the rod 11 of the bottom portion 10 has the guide bracket 1
By being caught by the second stopper 13, it is prevented from further descending. The stopper 13 prevents the bottom portion 10 of the auxiliary scraper 8 from coming into contact with the conveyor belt 3 even when the bottom portion 10 is at the lowest position.

On the other hand, below the conveyor belt 3, there is provided a push-up member 14 that pushes the belt 3 up flat and pushes the upper surface of the belt 3 against the main scraper 7 and the sub scraper 8. The push-up member 14 is composed of an elevating frame 16 provided with a plurality of flat rollers 15, and is vertically movable by a parallel link mechanism (not shown). According to this structure, the unloading of the scraper device 5 is turned ON-OFF by raising and lowering the push-up member 14 and raising and lowering the conveyor belt 3, as shown in FIGS. 3 to 4 (FIGS. 6 to 8). .

Trough-type guide rollers 17 for guiding the conveyor belt 3 are provided in front of and behind the main scraper 7 and the auxiliary scraper 8, respectively.

Next, the operation of this embodiment will be described.

The scraper device 5 is turned on and the conveyor belt 3 is turned on.
When unloading the upper conveyed article 4, as shown in FIG. 3, the push-up member 14 is lifted to lift the conveyor belt 3 flat, and the upper surface of the belt 3 is pressed against the main scraper 7 and the auxiliary scraper 8. As a result, as shown in FIG. 6, the conveyed product 4 on the belt 3 is sorted right and left by the main scraper 7 formed in a triangular plate shape, and is unloaded to the bunker 6 via a chute (not shown). At this time, the conveyor belt 3 is pressed against the flat roller 15 of the push-up member 14 and is deformed into a flat shape to easily meander. However, the conveyor belt 3 is provided with trough-shaped guide rails 17 before and after the main and auxiliary scrapers 7 and 8. Guided by, the movement of the belt is stable.

When the scraper device 5 is turned off to stop the unloading, the push-up member 14 is lowered to the position shown by the alternate long and short dash line in FIG. 3, but as shown in FIG. Thus, a flat gap 18 is formed between the main scraper 7 and the upper surface of the belt 3. At the same time, the bottom portion 10 of the sub scraper 8 is lowered by its own weight, and the sub scraper 8 is inclined so that its left and right end portions come into contact with the left and right end portions of the upper surface of the belt 3 as shown in FIG. As a result, the conveyed product 4 that has passed through the main scraper 7 and is evenly distributed in the width direction of the belt 3 is unloaded by the auxiliary scraper 8 on which the conveyed products 4 mounted on the left and right end portions of the belt 3 are inclined. The conveyed article 4 placed on the central portion of the belt 3 is conveyed as it is. This is shown in FIG. Therefore, the conveyed article 4 on the belt 3 does not drop (spill over) as the belt 3 advances, and the labor for cleaning can be saved. Here, the surface of the sub scraper 8 near the bottom portion 10 corresponds to the guide surface in the claims.

Further, in FIG. 1, the scraper device 5 at the center is shown.
When a is turned off and the leftmost scraper device 5b is turned on, that is, when the scraper device 5 is switched, the transported object 4 (coal)
When the central scraper device 5a is turned off during continuous conveyance of
The conveyed articles 4 placed on the left and right ends of the belt 3 are unloaded to the central bunker 6a by the auxiliary scraper 8 as shown in FIGS. Therefore, no spillage occurs between the center bunker 6a and the left end bunker 6b. Therefore, the scraper device 5 can be switched while the conveyed product 4 (coal) is continuously conveyed, and it is not necessary to cut the load 4 (conveyed product) every time the scraper device 5 is switched, unlike the conventional case. Transport efficiency is improved.

When the push-up member 14 is further lowered and lowered to the position shown in FIG. 5, the conveyor belt 3 is guided by the guide rollers 17 to become a trough type, preventing spillage of the load and performing normal conveyance. Here, since the rod 11 of the bottom portion 10 of the auxiliary scraper 8 is caught by the stopper 13 of the guide bracket 12 and its descent is restricted as shown in FIG. 8, it does not come into contact with the conveyor belt 3.

The prevention of load spillage when the conveyor belt 3 is lowered from the raised state and the meandering of the belt 3 have been described above, but conversely, when the belt 3 is raised from the lowered state, In the same manner, of course, the function of preventing spillage of the load and the function of preventing meandering are exhibited.

A modified embodiment is shown in FIG. As shown in the figure, this modification is different from the previous embodiment only in that the auxiliary scraper 8 is of a vertically elevating type instead of a tilting type. The sub scraper 8 is an L-shaped member 1 arranged in the width direction of the belt 3.
The left and right ends of the L-shaped member 19 are vertically guided by the guide brackets 12 made of the L-shaped member that are erected on the left and right sides of the belt 3. It is designed to move up and down. A stopper 13 for preventing the auxiliary scraper from falling too much is provided at the bottom of the guide bracket 12 as in the previous embodiment, and prevents the auxiliary scraper 8 and the conveyor belt 3 from coming into contact with each other during unloading as shown in FIG. .

According to this structure, the push-up member 1 shown in FIG.
At the intermediate position of 4, the auxiliary scraper 8 descends due to its own weight, and as shown in FIG. Therefore, spillage of the load on the downstream side is prevented. In this modified embodiment, the triangular plate 20 forming the auxiliary scraper 8 corresponds to the guide surface in the claims.

[0027]

As described above, according to the present invention, the following excellent effects can be exhibited.

(1) When the unloading is stopped by lowering the push-up member, the auxiliary scrapers unload the conveyed products at the left and right end portions on the belt, so that spillage on the wake side can be prevented.

(2) At the time of unloading, the meandering of the belt generated in the flattened belt pushed up by the push-up member,
It is held down by a trough-shaped guide roller.

(3) The prevention of spillage of the load and the meandering of the belt are exhibited not only when the conveyor belt is lowered but also when it is raised.

(4) Since it has a simple structure, it can be easily attached by making a small modification to the existing scraper device.

[Brief description of drawings]

FIG. 1 is a schematic view of a belt conveyor including a scraper device according to an embodiment of the present invention.

FIG. 2 is a plan view of the scraper device.

FIG. 3 is a side view of the scraper device during unloading (during operation).

FIG. 4 is a side view when the scraper device is switched from operating to non-operating.

FIG. 5 is a side view of the scraper device when not in operation.

6 is a sectional view taken along line VI-VI of FIG.

7 is a sectional view taken along line VII-VII of FIG.

8 is a sectional view taken along line VIII-VIII of FIG.

FIG. 9 is a diagram showing an auxiliary scraper of a modified example, (a)
Is a plan view and (b) is a front view.

10 is a sectional view taken along line XX of FIG.

FIG. 11 is a plan view of a scraper device showing a conventional example.

FIG. 12 is a side view of the scraper device during unloading (operation).

FIG. 13 is a side view when the scraper device is switched from operating to non-operating.

[Explanation of symbols]

3 conveyor belt 4 Transported items 5 scraper device 7 main scraper 8 Deputy scraper 14 Push-up member 17 Guide roller

Claims (2)

(57) [Claims] 1. A triangle-shaped main scraper is provided above the conveyor belt at a predetermined distance from the belt upper surface so as to distribute the conveyed articles on the belt to the left and right, and the belt is pushed up flat below the conveyor belt to raise the belt upper surface. In a scraper device for a conveyor provided with a push-up member to be pressed against the main scraper, on the wake side of the main scraper, descends from this and comes into contact with the left and right end portions of the belt upper surface, and on the left and right end portions except the central portion. A scraper device for a conveyor, characterized in that a sub-scraper having a guide surface for pushing and moving the conveyed items to the left and right is provided. 2. The scraper device for a conveyor according to claim 1, wherein trough-type guide rollers for guiding the conveyor belt are provided in front of and behind the main scraper and the auxiliary scraper, respectively.