JP2008127177A - Belt meandering correction device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt meandering correction device correcting meandering of a belt without being influenced by the frictional resistance of the belt and deposits on the belt, without requiring electric power for driving. <P>SOLUTION: This belt meandering correction device 10 for correcting the meandering of the belt 12 by turnably journaling within a horizontal plane, the center of a roller frame 16 for rollers 13-15 supporting the belt 12 of a belt conveyor 11, detecting the meandering of the belt 12, and turning the roller frame 16 in a horizontal plane, is provided with an arm member 18 arranged tilably around a center rotating shaft 17 below the belt 12, and first and second detection rollers 19, 20 rotatably attached to both sides of the arm member 18 and provided on both sides of the belt 12, and has a meandering detection means 21 having the arm member 18 tilted by the meandering of the belt 12, and a turning direction converting means 22 converting the tilt of the arm member 18 into the turning of the roller frame 16 to correct the meandering of the belt 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a belt meandering correction device for correcting the meandering of a belt of a belt conveyor.

One of a plurality of rollers across the belt of the belt conveyor is a tiltable control roller, and a detection ring that rotates independently of the control roller is provided at one end of the control roller. By providing a tapered surface on the side so that its outer diameter gradually increases as it moves away from the control roller in the axial direction, when the end of the meandering belt rides on this tapered surface, it is detected by the belt force. There has been proposed a belt meandering prevention device that corrects meandering of the belt by rotating the ring and tilting the control roller, thereby applying a force in the direction opposite to the biasing direction to the belt (see, for example, Patent Document 1). .

JP-A-6-11001

However, in the invention described in Patent Document 1, the function of tilting the control roller is easily influenced by the frictional resistance generated between the belt and the tapered surface of the detection ring or the adhesion of foreign matter to the belt or the tapered surface. Even if the belt is slightly biased, the control roller may tilt unnecessarily large, and there is a problem that a sufficient meandering prevention effect cannot be obtained.
In view of this, a method has been proposed in which the deviation of the belt is detected by a non-contact sensor, and the motor is tilted by driving the motor based on the output from the sensor. However, in this method, a sensor and a motor must be attached to the control roller, resulting in a complicated configuration of the control roller. When the length of the belt conveyor is increased, a power cable for supplying power to the motor and the sensor is not provided. There is also a problem that the installation work becomes large.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a belt meandering correction device that does not require driving power and can correct the meandering of the belt without being affected by frictional resistance generated on the belt or foreign matter adhering to the belt. The purpose is to provide.

A belt meandering correction device according to the present invention that meets the above-described object is provided such that the center of a roller frame of a roller that supports the belt of a belt conveyor is pivotally supported in a horizontal plane so that the belt frame is detected by detecting the meandering of the belt. In a belt meandering correction device that rotates in a horizontal plane and corrects the meandering of the belt,
An arm member disposed at a lower portion of the belt so as to be tiltable about a central rotation shaft, and first and second arms that are rotatably attached to both sides of the arm member and provided on both sides of the belt. A meandering detecting means comprising a detecting roller, wherein the arm member tilts by meandering of the belt;
A turning direction converting means for converting the tilt of the arm member into turning of the roller frame and correcting meandering of the belt;

In the belt meandering correction device according to the present invention, it is preferable that each of the first and second detection rollers is inclined in an outward direction of the belt with respect to a vertical axis.

In the belt meandering correction device according to the present invention, the turning direction changing means meshes with the first and second bevel gears arranged opposite to each other, and the first and second bevel gears, and is fixed to the rotating shaft. A gear mechanism including a third bevel gear, first and second arms connected to output shafts of the first and second bevel gears, the first and second arms, and the roller frame. It can be set as the structure which has the universal joint and connecting rod which connect both the side parts of this so that a swing is possible.

In the belt meandering correction device according to the present invention, a tension spring is provided on each side of the base portion excluding the central portion of the arm member, one end of which is fixed to a frame on which the arm member and the other end are fixed to the roller frame. When the belt does not come into contact with the first and second detection rollers, it is preferable that the arm member is held at a symmetrical position.

The belt meandering correction device according to any one of claims 1 to 4, wherein no power is required, the frictional resistance generated in the belt and the influence of foreign matter adhering to the belt are suppressed, and the roller frame swivels according to the belt meandering distance. The angle can be adjusted, and the meandering correction of the belt can be performed efficiently.

In particular, in the belt meandering correction device according to the second aspect, the lower side of the end portion of the meandering belt can be brought into contact with the detection roller, and wear of the belt end surface can be suppressed.
In the belt meandering correction device according to the third aspect, the roller frame can be efficiently swung in the horizontal plane with the rotation of the rotation shaft.

5. The belt meandering correction apparatus according to claim 4, wherein the arm member which has been tilted as the belt meandering is corrected can be gradually returned to the left-right symmetrical position, and the moving state of the belt with the meandering corrected is maintained. can do.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
Here, FIG. 1 is a front view of a belt meandering correction device according to an embodiment of the present invention, FIG. 2 is a plan view of the belt meandering correction device, FIG. 3 is a side view of the belt meandering correction device, and FIG. It is a partially omitted front view of the belt meandering correction device.

As shown in FIGS. 1 to 4, the belt meandering correction device 10 according to one embodiment of the present invention swivels the center of a roller frame 16 of rollers 13 to 15 that support the belt 12 of the belt conveyor 11 in a horizontal plane. It is pivotally supported, detects the meandering of the belt 12, and rotates the roller frame 16 in a horizontal plane to correct the meandering of the belt 12. The belt 12 can be tilted around the central rotating shaft 17 at the lower part of the belt 12. And the first and second detection rollers 19 and 20 provided on both sides of the belt 12 so as to freely rotate on both sides of the arm member 18. The meandering detecting means 21 for tilting the member 18 and the turning direction converting means 22 for correcting the meandering of the belt 12 by converting the tilting of the arm member 18 to the turning of the roller frame 16.Details will be described below.

As shown in FIG. 3, the belt 12 of the belt conveyor 11 is supported by a plurality of fixed roller frames 24 arranged side by side on a gantry 23. Here, the fixed-type roller frame 24 is disposed in contact with the central portion of the lower surface of the belt 12 and rotated in the traveling direction of the belt 12 and inclined on the outer side of the belt 12 on both sides of the roller 25. A roller 26 that rotates in the traveling direction of the belt 12 and a roller support member 27 that supports the rollers 25 and 26 are provided. The roller frame 16 is arranged in a gap between the fixed roller frames 24 arranged side by side. Reference numeral 27 a denotes an attachment member for fixing the roller support member 27 to the gantry 23, and reference numeral 28 denotes a roller provided on the lower side of the gantry 23 to support the return belt 12.

Here, as shown in FIGS. 1 and 4, the roller frame 16 includes a roller 14 disposed in contact with the central portion of the lower surface of the belt 12, and rollers 14 provided on both sides of the roller 14 are moved along the belt 12. The first and second roller mounting members 29 and 30 that are rotatably held in the direction, the roller 13 provided on one side (left side in the drawing) of the roller 14, and the roller 13 together with the first roller mounting member 29 A third roller mounting member 31 that is tilted outwardly from the belt 12 and rotatably held in the traveling direction of the belt 12, a roller 15 provided on the other side (right side in the drawing) of the roller 14, and a second And a fourth roller mounting member 32 that holds the roller 15 in an upwardly upward direction of the belt 12 so as to be rotatable in the traveling direction of the belt 12. Further, the roller frame 16 includes a frame base 33 to which the base sides of the first to fourth roller mounting members 29 to 32 are fixed, and a base plate 34 having a front side fixed to the center of the frame base 33 and the base side being the base 23. And a pivot shaft 35 that is rotatably fitted in the insertion hole formed in the.

As shown in FIGS. 1 to 3, the meandering detection means 21 is fixed to a mounting base 36 provided on the gantry 23. The arm member 18 of the meandering detection means 21 has an arm base portion 39 in which a front end of the rotating shaft 17 is fitted and fixed by a key 37, and a belt attached to both sides of the arm base portion 39. 12 have arm side portions 40 and 41 attached to be inclined toward the upper side of the outer side, and arm tip portions 42 and 43 attached to the front portions of the arm side portions 40 and 41.
The first and second detection rollers 19 and 20 are attached to the front sides of the arm side portions 40 and 41 so as to be inclined in the outward direction of the belt 12 with respect to the vertical axis. By attaching the first and second detection rollers 19 and 20 at an inclination, the lower side of the end of the meandering belt 12 can be brought into contact with the first and second detection rollers 19 and 20. Wear on the end face can be suppressed. By adjusting the mounting positions of the first and second detection rollers 19 and 20, the distance L between the end of the belt 12 and the side surfaces of the first and second detection rollers 19 and 20 is, for example, 10 Adjust to ~ 150mm range. The maximum meandering allowable distance on the left and right sides of the belt 12 can be set with the length of the distance L.

By adopting such a configuration, for example, when the traveling belt 12 gradually starts to meander to the left side (one side) and the meandering distance S exceeds the maximum meandering allowable distance, that is, L, the left side of the belt 12 The end comes into contact with the first detection roller 19 and tries to move the first detection roller 19 to the left side by a distance SL. However, since the first detection roller 19 is attached to the arm member 18, it cannot horizontally move to the left side, and the distance S− that the first detection roller 19 must move by tilting the arm member 18 to the left side. L is secured (therefore, the left end portion of the belt 12 moves on the side surface of the first detection roller 19 toward the front side of the first detection roller 19 as the arm member 18 tilts). Here, since the arm side portions 40 and 41 are attached to both side portions of the arm base portion 39 so as to be inclined toward the outside upward direction of the belt 12, even if the arm member 18 tilts, the tip of the arm member 18 However, as the meandering distance of the belt 12 increases, the tilt angle of the arm member 18 can be increased accordingly.

A tension spring 45 fixed to a spring mounting portion 44 provided at one end of the arm side portions 40 and 41 and one end thereof to the arm side portions 40 and 41 and the other end of the mounting base 36 provided on the mount 23, respectively. 46 is provided.
Thereby, the arm member 18 can be held in the left-right symmetric position until the belt 12 contacts the first and second detection rollers 19 and 20. Further, for example, when the belt 12 meanders to the left side to press the first detection roller 19 and the arm member 18 is tilted counterclockwise, the tension spring 46 attached to the arm side portion 41 is stretched. It is in the state. For this reason, since a contraction force is generated in the stretched tension spring 46, a force that rotates the arm member 18 clockwise acts on the arm member 18.

Accordingly, when the meandering distance of the belt 12 is decreased and the left end portion of the belt 12 is separated from the first detection roller 19, the arm member 18 is tilted clockwise to move the first detection roller 19 to the belt 12. It is made to contact | abut to the left side edge part. As a result, when the meandering distance of the belt 12 is gradually reduced, the counterclockwise tilt angle of the arm member 18 is also gradually reduced. When the meandering distance of the belt 12 meandering to the left becomes the maximum meandering allowable distance, the arm member 18 is symmetrical in a state where the first detection roller 19 is in contact with the left end of the belt 12. Held in position. Further, when the meandering distance of the belt 12 is reduced, the left end portion of the belt 12 is separated from the side surface of the first detection roller 19.

As shown in FIGS. 2 and 3, the turning direction changing means 22 meshes with the first and second bevel gears 47, 48 and the first and second bevel gears 47, 48 that are arranged to face each other, and the rotation shaft A gear mechanism 52 having a third bevel gear 49 fixed to the base portion of 17 and output shafts 50 and 51 whose base portions are fixed to the first and second bevel gears 47 and 48, and the gear mechanism 52 are accommodated. And a gear box 53 to be used.
Further, the turning direction converting means 22 includes first and second arms 54 and 55 connected to output shafts 50 and 51 protruding left and right of the gear box 53, first and second arms 54 and 55, and rollers. First and second connecting mechanisms 56 and 57 for connecting both side portions of the frame base 33 of the frame 16 so as to be swingable are provided. Here, the first coupling mechanism 56 includes a universal joint 58 attached to the tip of the first arm 54, a coupling rod 59 connected to the universal joint 58, and a coupling rod 59 via a universal joint 61. The front portion is connected, and the base portion has a first mounting member 62 fixed to the frame base 33. The second coupling mechanism 57 includes a universal joint 58 attached to a tip portion of the second arm 55, a coupling rod 60 connected to the universal joint 58, and a coupling rod 60 that has a universal joint 61 through the universal joint 61. And a second attachment member 63 having a base fixed to the frame base 33.

With such a configuration, when the arm member 18 is viewed from the front, for example, when the arm member 18 tilts to the left (counterclockwise direction, that is, one direction), the rotation shaft 17 also rotates counterclockwise (counterclockwise, That is, the third bevel gear 49 rotates counterclockwise. Therefore, when the output shaft 50 is viewed from the front, the first bevel gear 47 rotates clockwise (clockwise, that is, in the other direction), and the output shaft 50 also rotates clockwise. On the other hand, the second bevel gear 48 rotates clockwise when the output shaft 51 is viewed from the front, and the output shaft 51 also rotates clockwise. As a result, the first arm 54 tilts in the traveling direction of the belt 12, and the second arm 55 tilts in the counter-traveling direction of the belt 12, and accordingly, the first mounting member 62 moves in the traveling direction of the belt 12. In addition, the second attachment member 63 is pushed in the direction in which the belt 12 moves in the opposite direction. As a result, a counterclockwise (counterclockwise) rotational force can be applied to the roller frame 16 in plan view with the pivot shaft 35 as the center.
Here, universal joints 58 and 61 are provided on both sides of the connecting rods 59 and 60 so that both sides of the connecting rods 59 and 60 can swing. 60, the first arm 54 and the first mounting member 62 and the second arm 55 and the second mounting member 63 can be connected to each other, and the first and second arms 54 and 55 can be tilted. Accordingly, as shown in FIG. 2, the roller frame 16 can be turned counterclockwise about the turning shaft 35.

Then, the effect | action of the belt meandering correction apparatus 10 which concerns on one embodiment of this invention is demonstrated.
As shown in FIG. 1, when the belt 12 does not meander in the belt conveyor 11 in use, the arm member 18 is held in a left-right symmetric position (the roller frame 16 is held in a non-turning state). The running state of the belt 12 is maintained. Even if meandering occurs in the belt 12, when the meandering distance S is not more than the maximum meandering distance L, the first and second detection rollers 19 and 20 are not pressed by the end of the belt 12, The arm member 18 is held at a symmetrical position, and the running state of the belt 12 is maintained.

As shown in FIG. 1, when the belt 12 meanders to the left side (one side) and the meandering distance S exceeds the maximum meandering allowable distance L, the left end portion of the belt 12 abuts against the first detection roller 19 and In order to move the one detection roller 19 to the left by the distance SL, the arm member 18 tilts to the left. When the arm member 18 tilts to the left, the rotation shaft 17 rotates counterclockwise and the third bevel gear 49 also rotates counterclockwise. Accordingly, when the output shaft 50 is viewed from the front, the first bevel gear 47 rotates clockwise and the output shaft 50 also rotates clockwise. On the other hand, the second bevel gear 48 rotates clockwise when the output shaft 51 is viewed from the front, and the output shaft 51 also rotates clockwise.

As a result, the first arm 54 tilts in the traveling direction of the belt 12, and the second arm 55 tilts in the counter-traveling direction of the belt 12. For this reason, the first mounting member 62 is pulled in the traveling direction of the belt 12 via the connecting rods 59 and 60, and the second mounting member 63 is pushed in the counter-traveling direction of the belt 12. Therefore, when viewed from above, the roller frame 16 is subjected to a counterclockwise rotational force about the turning shaft 35, and the roller frame 16 turns counterclockwise around the turning shaft 35 as shown in FIG. .

When the roller frame 16 turns counterclockwise around the turning shaft 35, the rollers 13 to 15 held by the roller frame 16 also turn counterclockwise in plan view. As a result, the traveling direction of the belt 12 changes to the right side (the other side), and the meandering of the belt 12 is corrected.
Here, when the arm member 18 is tilted counterclockwise, the tension spring 46 attached to the arm side portion 41 is in the stretched state, so that the tension spring 46 that is stretched has a contracting force. The arm member 18 is in a state in which a force that rotates the arm member 18 clockwise acts on the arm member 18. For this reason, when the meandering distance of the belt 12 is corrected and the meandering distance S of the belt 12 is gradually reduced, the left end portion of the belt 12 is separated from the first detection roller 19, so that the arm member 18 tilts clockwise, The counterclockwise tilt angle of the member 18 also gradually decreases. When the meandering distance of the belt 12 meandering to the left reaches the maximum meandering allowable distance, the first detection roller 19 comes into contact with the left end of the belt 12 and the arm member 18 is held in a symmetrical position. Thus, the meandering correction of the belt 12 is stopped. When the meandering distance of the belt 12 is further reduced, the left end portion of the belt 12 is detached from the side surface of the first detection roller 19.

As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
For example, in the present embodiment, the first and second detection rollers are attached to the arm side portion, but may be attached to the arm tip portion so as to be inclined outwardly of the belt with respect to the vertical axis.

It is a front view of the belt meandering correction apparatus which concerns on one embodiment of this invention. It is a top view of the belt meandering correction device. It is a side view of the belt meandering correction device. It is a partially omitted front view of the belt meandering correction device.

Explanation of symbols

10: belt meandering correction device, 11: belt conveyor, 12: belt, 13-15: roller, 16: roller frame, 17: rotating shaft, 18: arm member, 19: first detection roller, 20: second Detection roller, 21: meandering detection means, 22: turning direction conversion means, 23: frame, 24: fixed roller frame, 25, 26: roller, 27: roller support member, 27a: mounting member, 28: roller, 29 : First roller mounting member, 30: second roller mounting member, 31: third roller mounting member, 32: fourth roller mounting member, 33: frame base, 34: substrate, 35: pivot axis, 36: mounting base, 37: key, 38: bearing portion, 39: arm base, 40, 41: arm side portion, 42, 43: arm tip portion, 44: spring mounting portion, 45, 46: tension spring, 4 : First bevel gear, 48: second bevel gear, 49: third bevel gear, 50, 51: output shaft, 52: gear mechanism, 53: gear box, 54: first arm, 55: second Arm: 56: first connecting mechanism, 57: second connecting mechanism, 58: universal joint, 59, 60: connecting rod, 61: universal joint, 62: first mounting member, 63: second mounting member

Claims (4)

A belt meander for correcting the meandering of the belt by pivotally supporting the center of the roller frame of the roller supporting the belt of the belt conveyor so as to be rotatable in a horizontal plane, detecting the meandering of the belt, and turning the roller frame in the horizontal plane. In the correction device,
An arm member disposed at a lower portion of the belt so as to be tiltable about a central rotation shaft, and first and second arms that are rotatably attached to both sides of the arm member and provided on both sides of the belt. A meandering detecting means comprising a detecting roller, wherein the arm member tilts by meandering of the belt;
A belt meandering correction device comprising: a turning direction changing means for changing the meandering of the belt by converting the tilting of the arm member into turning of the roller frame. 2. The belt meandering correction device according to claim 1, wherein each of the first and second detection rollers is inclined in an outward direction of the belt with respect to a vertical axis. 3. The belt meandering correction device according to claim 1, wherein the turning direction converting means meshes with the first and second bevel gears arranged to face each other and the first and second bevel gears. A gear mechanism having a third bevel gear fixed to the rotation shaft, first and second arms connected to output shafts of the first and second bevel gears, and the first A belt meandering correction device, comprising: a second arm and a universal joint for connecting the both sides of the roller frame so as to be able to swing, and a connecting rod. 4. The belt meandering correction apparatus according to claim 1, wherein one end is fixed to the arm member and the other end is fixed to the roller frame on both sides of the base portion excluding a central portion of the arm member. A belt meandering correction characterized in that when the belt does not contact the first and second detection rollers, the arm member is held in a bilaterally symmetrical position. apparatus.

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