JPH09100014A - Automatic adjusting device for conveyor belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically correct cross-sectional directional deviation of a conveyor belt by applying light emitting paint to an upper side surface in the vicinity of an upper side end part of a belt formed into an almost cylindrical shape, and inputting an output quantity of a detector to sense width directional deviation of the light emitting paint to an adjuster. SOLUTION: When a belt 1 is formed into cylindrical shape to detect width directional deviation of the belt 1, light emitting paint 11 is applied to an upper side surface in the vicinity of an upper side end part of a top part. Deviation of a light emitting area of a light emitting end part caused by the width directional deviation of the belt 1 is caught by a detector 6. A grip tensioned from a central shaft 4 as a mechanism to correct the width directional deviation of the belt 1 by using rolling friction between the belt 1 and a roller 3 which engages with this and supports this, is fitted in both side grooves arranged in a fixing frame, and an angle of the central shaft 4 is made freely adjustable. A microcomputer is arranged in the detector 6, and a proper angle variation is calculated to a deviation quantity, and a signal based on a return is transmitted to an adjuster 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for automatically correcting a deviation of a conveyor belt which conveys powders, viscous materials and the like.

[0002]

2. Description of the Related Art A conveyor belt 1 engages with a drive pulley 2 at both ends as shown in FIG. 1 (a), and as shown in FIG. 1 (b) at a position close to the engaged both ends. To
As shown in FIG. 1C, at the central part of the position where it is engaged reversely and has a shape close to a substantially planar shape, as shown in FIG.
It has a substantially cylindrical shape, and the transported object can be stably transported without leaking to the outside in the cylindrical shape.

However, in such conveyance by the conveyor belt 1, the weight distribution of the conveyed object is unbalanced, the rotational frictions of the rollers 3 supporting the belt 1 are different, and the tension in the width direction of the belt 1 is unbalanced. As shown in FIGS. 2A, 2 </ b> B, and 2 </ b> C, the belt is often displaced (rolled) in the cross-sectional direction due to the adjustment, especially in the upper belt 1 supporting the transported object. Such a tendency is remarkable (the roller engaging with the belt is not shown in FIG. 2).

Such a deviation in the cross-sectional direction may cause a local stress to the belt 1 and eventually cause a local damage to the belt 1.

In particular, when the belt 1 made of a synthetic resin used for conveying food is used, the above-mentioned local damage is remarkable, which may shorten the life of the belt 1 remarkably.

Therefore, the conventional conveyor belt 1
In Japanese Patent Laid-Open Publication No. 2004-242242, no specific configuration has been proposed for correcting the deviation in the cross-sectional direction as described above.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a structure capable of automatically correcting such deviation in the cross sectional direction of a conveyor belt.

[0008]

In order to solve the above-mentioned problems, the structure of the present invention has a structure in which drive pulleys at both ends are bridged,
In a conveyor belt that is held at each position by a plurality of engaging rollers and a part of the cross-linked portion forms a substantially cylindrical shape, among the belts located above and below, at least for the upper belt, each position Among the plurality of rollers held in, the central axis of at least the roller engaged with the lower portion and the side portion of the belt is one common central axis, and the handle stretched from the central axis is provided on both sides of the fixing frame. By fitting in the side groove, an engaging direction adjuster for the central shaft is provided by making it possible to adjust the angle of the central shaft in the left-right direction with respect to the traveling direction of the conveyor belt, and when the belt has a substantially cylindrical shape, Of the ends located at the top, the luminescent paint is applied to the upper surface near the end forming the upper side, and a detector for detecting the deviation in the width direction of the luminescent paint is provided, and the output amount of the detector is Adjuster By, consisting automatic adjuster of the conveyor belt, characterized in that automatically correct the deviation.

[0009]

The operation principle of the present invention will be described below.

As shown in FIG. 3A, the belt 1 is displaced to the right in the width direction even though the central axis 4 is in a state of being substantially orthogonal to the traveling direction of the belt 1. In this case, as shown in FIG. 3B, the central axis 4 is adjusted so as to form an angle (counterclockwise angle) inclined to the left of the traveling direction of the belt 1.

As a result, the belt 1 is displaced to the right.
Is forced to face the left side due to the rotational friction with the roller 3 engaged with it, the deviation to the right is corrected as shown in FIG. It will return to the correct position.

In FIGS. 3 (a), 3 (b) and 3 (c), almost all of the roller 3 and the central shaft 4 are indicated by dotted lines.

That is, according to the present invention, the deviation in the width direction of the belt 1 is corrected by utilizing the rotational friction between the belt 1 and the roller 3 engaged with and supporting the belt 1. Four
In the present invention, the angle of FIG.
As shown in (a) and (b), the handle stretched from the central shaft 4 is fitted into both side grooves 51 provided in the fixed frame 5, whereby the angle of the central shaft 4 can be adjusted.

The both-side groove 51 may have a substantially straight line shape or a substantially arc shape, but when the angle of the central axis 4 is adjusted, both ends inevitably make an arc motion.
As shown in (b), generally arcuate double-sided grooves are usually adopted.

In order to detect the deviation of the belt 1 in the width direction, when the belt 1 has a cylindrical shape, near the upper end of the apex, the spots of FIG. As shown in the drawing, the luminescent paint is applied, and the deviation of the light emitting region at the light emitting end portion due to the deviation in the width direction of the belt 1 is detected by the light receiving element provided in the detector 6, so that the belt 1 It catches the deviation in the width direction.

[0016]

[Embodiment 1] With respect to the deviation of the belt 1 in the width direction, a theoretical formula is not found immediately for the direction of the pressing roller 31 at the top for correcting the deviation, and a predetermined deviation is not found. In order to accurately set how much the angle of the pressing roller 31 at the top should be changed with respect to the position, it is possible to correspond to the deviation amount in the width direction of the individual belt 1 by accumulating empirical rules. The amount of change in angle of the pressing roller 31 has to be determined, but it is necessary to convert or convert the amount of change in angle required for any deviation in the width direction based on the accumulation. For example, a method in which a microcomputer is installed in the detector 6 to calculate an appropriate angle change amount with respect to the deviation amount and the signal based on the return is transmitted to the adjuster 7.

The method can accurately adjust the angle with respect to the deviation amount.

[0018]

Second Embodiment In the method of the first embodiment, the size of the apparatus tends to be large because a microcomputer must be installed.

Moreover, the adjustment of the belt deviation does not necessarily require the accurate adjustment provided with the microcomputer.

In practice, when the detector 6 detects a constant deviation in the width direction of the belt 1 via the deviation of the luminescent paint, it sends a detection signal to the adjuster 7, and the adjuster 7 Just by adjusting the angle deviation according to the preset angle,
The deviation of the belt 1 in the angular direction can be corrected fairly accurately.

In the second embodiment, in view of such a situation, when the deviation of the luminescent paint in the width direction exceeds a certain range, the detector 6 detects the deviation and delivers a detection signal to the adjuster 7. Thus, the adjuster 7 adjusts the preset angular deviation.

By this, the deviation of the conveyor belt 1 is automatically corrected.

[0023]

With the configuration of the present invention as described above, it is possible to automatically correct the deviation of the conveyor belt, so the present invention makes a great contribution to the technical field of conveyor belts. .

[Brief description of the drawings]

1] (a) (b) (c): horizontal cross-sectional view and vertical cross-sectional view showing the basic configuration of a conveyor belt.

2 (a), (b), and (c): cross-sectional views showing a normal position of the conveyor belt and a state of being displaced in the left-right direction.

3 (a), (b) and (c): top view The principle of operation of the present invention is shown.

4 (a), (b): Top view and side sectional view FIG. 4 shows a specific configuration of the adjusting machine.

FIG. 5: Side view An overview of the automatic adjustment of the present invention is shown (a plurality of dots at one end of the belt indicate a state in which a luminescent paint is applied).

[Explanation of symbols]

1: Conveyor belt 11: Luminescent paint 2: Driving pulley 3: Roller 31: Roller that presses the top of the conveyor belt having a cylindrical cross section 4: Rotation center axis 5: Fixed frame 51: Groove 6: Detector 7: Adjuster

Claims (1)

[Claims] 1. A conveyor belt, which is bridged to drive pulleys at both ends, is held at each position by a plurality of engaging rollers, and a part of the bridged part has a substantially cylindrical shape, and is positioned above and below. Of the plurality of rollers that are held at each position with respect to at least the upper belt, the central axis of at least the roller that is engaged with the lower portion and the side portion of the belt is one common central axis. A center shaft engaging direction adjuster in which a handle stretched from the center shaft is fitted in both side grooves of a fixed frame so that a horizontal angle of the center shaft with respect to a traveling direction of a conveyor belt can be adjusted. When the belt has a substantially cylindrical shape, the luminous paint is applied to the upper side surface near the upper end of the ends located at the top, and the deviation in the width direction of the luminous paint is detected. Set up a detector An automatic conveyor belt adjusting device, which automatically corrects the deviation by inputting the output amount of the detector into the adjusting device.