JP2000264427A - Removal method for stuck material in belt conveyer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily remove an object stuck to a belt of a belt conveyer, without accompanying contact with the object or the stop of the belt conveyer. SOLUTION: This is a method for removing an object stuck to a belt 1, when the endless belt 1 is laid across a roll 2 and reversed downward to drop the object 3 transferred along with the belt 1, for example, the belt 1 after reversion is vibrated using a vibrator 5, and the object 3 stuck to the belt 1 is dropped by the vibration. In this case, the amplitude and/or frequency of the vibration can be set variable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing articles adhered to a belt of a belt conveyor.

[0002]

2. Description of the Related Art Inverting a belt of a belt conveyor downward by a roll and dropping an article conveyed together with the belt at the inversion position, the above-mentioned inversion depends on the physical properties (moisture content, viscosity, etc.) of the article. All the articles may not fall at the position, and the articles may still adhere to the inverted belt, that is, the belt moved behind the roll. This article needs to be removed from the belt because it causes the quality of the article to deteriorate.

FIG. 3 shows an example of a conventional method for removing adhered articles. In the figure, reference numeral 1 denotes a belt of a belt conveyor, and the belt 1 is wound around a roll 2 rotatably supported around a horizontal shaft 2a. Belt 1 is roll 2
After moving to the roll 2 side as shown by the arrow F with the rotation of, the article 3 placed on the belt 1 is turned over below the roll 2 so that the article 3 placed on the belt 1 is rolled together with the belt 1.
To the end of the belt conveyor (left end in Fig. 3)
Fall from.

On the other hand, a scraper 4 is provided behind the roll 2 to contact the surface of the inverted belt 1 from below. The belt 1 moves from left to right in the figure with its surface in contact with the scraper 4, and as a result, the article 3 attached to the surface of the belt 1 is peeled off by the scraper 4. 3 falls and is removed as indicated by reference numeral 3a.

[0005]

However, in the case of the above-mentioned removing method, the stripped-off article 3 is shown in FIG.
In some cases, the scraper 4 adheres and accumulates on the side face of the scraper 4 facing the roll 2 side. Since the deposits fall from the scraper 4 due to drying or the like and are mixed with the articles 3 that have fallen earlier to lower the quality of the articles 3, and also become a source of bacteria or the like depending on the type of the articles 3. It was necessary to stop the belt conveyor regularly and clean the scraper 4.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to easily remove an article 3 attached to a belt 1 after reversal without contacting the article 3 or stopping a belt conveyor. That is the purpose.

[0007]

SUMMARY OF THE INVENTION According to the present invention, an endless belt is wrapped around a roll, turned downward, and the articles adhered to the belt are removed from the belt when the articles transported with the belt are dropped. The method is characterized in that the belt after the reversal is vibrated, and the article attached to the belt is dropped from the belt by the vibration.

Here, the amplitude and / or frequency of the vibration can be made variable.

Further, the belt is vibrated by, for example, belt vibrating means provided on the inverted belt. Here, the position of the belt vibrating means is desirably 3 to 5 times the diameter of the roll behind the end of the belt conveyor on the article falling side, in the movement direction of the belt. The direction of application of the vibration by the belt vibrating means may be inclined 20 to 40 degrees forward with respect to the axis orthogonal to the surface of the belt after the reversal in the moving direction of the belt.

On the other hand, the belt may be vibrated by roll vibrating means provided on the roll.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In the following description, members having the same configuration as that shown in FIG. 3 are denoted by the same reference numerals as those in FIG. 3 and the description is omitted.

FIG. 1 shows an example of a belt conveyor to which the method for removing adhered articles according to the present invention is applied. In this belt conveyor, a belt 1 turned downside down by a roll 2
Is provided with a vibrator (belt vibrating means) 5 for vibrating the inverted belt 1.

In this belt conveyor, the belt 1 is moved in the direction of arrow F, and at the same time, the inverted belt 1 is vibrated by the vibrator 5. Then, the article 3 placed on the belt 1 is transferred to the roll 2 side together with the belt 1 and falls from the end of the belt conveyor (the left end in FIG. 1), and at the same time when the inverted belt 1 leaves the roller 2, The vibration of the belt 1 is applied to the article 3 attached to the belt 1. As a result, the article 3 attached to the belt 1
Without being transported rearward, as shown by reference numeral 3b in FIG.

That is, in the method for removing adhered articles according to the present invention, it is possible to easily and reliably remove the articles 3 adhered to the belt 1 after the reversal during the operation of the belt conveyor. In addition, since equipment other than the belt 1 does not come into contact with the articles 3 in the belt conveyor, the accumulation of the articles 3 in these equipments, and the articles 3 caused by the contact between the articles 3 and the above-mentioned equipment.
There is no contamination of the above equipment. Therefore, in this method of removing adhered articles, it is not necessary to periodically stop and clean the belt conveyor as long as the belt 1 is kept clean.

Here, since the adhesion of the article 3 to the belt 1 varies depending on the physical properties of the article 3, the vibration of the belt 1 optimal for removing the article 3 is appropriately adjusted while actually transporting the article 3 by the belt conveyor. I do. For example, a water content of 60%
When removing immersed rice from the belt conveyor, the most effective removal effect is obtained by applying a vibration of 300 times / minute and an amplitude of 3 mm. However, when removing sawdust having a water content of 50% from the belt conveyor, Is a frequency of 1200 times / minute and an amplitude of 0.5
When a vibration of about 1 mm is applied, the removal effect is the highest.

Therefore, the article 3 is always indicated by the reference numeral 3b so that the end of the belt conveyor on the article falling side (the left end in FIG. 1).
In order to make the article fall near, it is desirable to make the amplitude and / or frequency of the vibration applied to the belt 1 by the vibrator 5 variable and appropriately change it according to the physical properties of the article 3.

Further, in order to improve the efficiency of removing the article 3 by vibration, the position of the vibrator 5 from the end of the belt conveyor on the article drop side (from the end of the article drop side to the belt 1 by the vibrator 5). Distance from the end of the belt conveyor on the article falling side by 3 to 5 times the diameter D of the roll 2 to the belt 1.
In the moving direction of the vehicle. For a similar purpose,
The direction of application B of the vibration by the vibrator 5 is set to a predetermined angle θ (where left = 2 in FIG. 1) with respect to the axis A orthogonal to the surface of the belt 1 after the reversal in the moving direction of the belt 1.
(0 to 40 °). In the example of FIG.
0 °.

Next, an application example of the method for removing adhered articles according to the present invention will be described below with reference to FIG.
This example utilizes the property that as the weight of the article 3 increases, the article 3 tends to fall under the influence of gravity and vibration. For example, as shown by reference numerals 3c, 3d, and 3e in FIG.
The object 3 is classified by changing the falling position of the article 3 from the object 3 according to the size of the article 3.

In the case of FIG. 2, the heavy article 3 among the articles 3 is not affected by vibration due to the reversal of the belt 1.
As shown by the reference numeral 3c, it falls from the belt 1 at the end of the belt conveyor. Next, the medium-weight article 3 receives the vibration of the belt 1 at the same time when the inverted belt 1 leaves the roller 2 and is shaken off the belt 1 as shown by reference numeral 3d. On the other hand, among the articles 3, the lightweight ones
It moves to the vibrator 5 side with the inverted belt 1,
When the vibration of the belt 1 increases due to the approach to the vibrator 5, the belt 1 is shaken off from the belt 1 as indicated by reference numeral 3e.

In this example, by adjusting the amplitude and / or frequency of the belt 1 so that the article 3 drops from the belt 1 at specific positions 3c, 3d and 3e according to its size, for example, like a sieve Without using any special equipment
An article 3 having a uniform particle size is obtained. For example, by applying this example when transferring immersed rice containing crushed rice on a belt conveyor, immersed rice without crushed rice and having uniform grain size is selected, and rice with a good texture is cooked. Becomes possible.

On the other hand, when the adhesion of the article 3 to the belt 1 is small, the shaft 2 of the roll 2 is replaced with the vibrator 5.
a may be provided with a roll vibrating means (not shown) to vibrate the roll 2 to vibrate the belt 1 via the roll 2.

[0022]

As described above, according to the method for removing adhered articles according to the present invention, it is possible to easily and reliably remove the articles adhered to the inverted belt during operation of the belt conveyor. In addition, among the belt conveyors, facilities other than the belt do not come into contact with the articles, so that there is no accumulation of articles in these facilities or contamination of the articles and the facilities due to contact between the articles and the facilities.

Therefore, in this method of removing adhered articles, if the belt is kept clean, there is no need to periodically stop and clean the belt conveyor. As a result, the operating rate of the belt conveyor is improved, In addition, the effect that the labor required for cleaning can be saved is obtained.

[Brief description of the drawings]

FIG. 1 is a partial side view of a belt conveyor showing an application example of a method for removing adhered articles according to the present invention.

FIG. 2 is a partial side view of a belt conveyor showing an application example of the method for removing adhered articles according to the present invention.

FIG. 3 is a partial side view of a belt conveyor showing an example of a conventional method for removing adhered articles.

[Explanation of symbols]

Reference Signs List 1 belt 2 roll 3 article 5 vibrator (belt vibrating means) A axis perpendicular to belt B application direction of vibration by belt vibrating means D diameter of roll L position of belt vibrating means from end of belt conveyor on the article falling side B. Direction of vibration applied by belt vibration

Claims (6)

[Claims] 1. A method for removing an article adhered to the belt from the belt when the article having been transported together with the belt is dropped by hanging a belt having an endless shape around a roll and inverting the belt downward. A method for removing adhering articles on a belt conveyor, comprising: vibrating the inverted belt and dropping the articles adhering to the belt from the belt by the vibration. 2. The method according to claim 1, wherein the amplitude and / or frequency of the vibration is variable. 3. The method according to claim 1, wherein the belt is vibrated by a belt vibrating means provided on the inverted belt. 4. The belt vibration means is located three to five times the diameter of the roll behind the end of the belt conveyor on the falling side of the article, in the movement direction of the belt. The method for removing adhered articles on a belt conveyor according to claim 3, characterized in that: 5. The apparatus according to claim 1, wherein the direction of application of the vibration by the belt vibrating means is in relation to an axis orthogonal to the surface of the belt after the reversal.
The method for removing adhered articles on a belt conveyor according to claim 3 or 4, wherein the belt is inclined forward by 20 to 40 degrees in the moving direction of the belt. 6. The apparatus according to claim 1, wherein said belt is vibrated by roll vibrating means provided on said roll.
Or the method of removing adhered articles in the belt conveyor according to 2.