JPH04117815U - Belt conveyor meandering prevention device - Google Patents

Abstract

(57) [Summary] [Objective] The object of the present invention is to provide a meandering prevention device for a belt conveyor that has a simple structure and is easy to handle. The meandering prevention device of the present invention uses a meandering correction roller 12 that is pressed against a belt 11, and tilts the roller 12 during meandering to forcibly move the belt 11 to its original position. When the belt 11 meanders, one of the meandering detection rollers 10 provided at both ends of the base plate 13 is moved, and the movement is converted into a tilting motion of the meandering correction roller 12 by a bell crank 14.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a meandering prevention device for a belt conveyor.

0002

[Conventional technology]

Meandering or uneven belt conveyor belt is caused by the assembly accuracy of the conveyor body and pulley. This is due to the assembly accuracy of the belt, the curling or warping of the belt itself, etc. belt snake like this As a means to prevent this, there is a method of using a pulley with a crown or the method shown in Figure 4. Meandering prevention devices 1 as shown are provided on both sides of the belt conveyor to plan the side edges of the belt 2. A method is known, such as a method in which the method is used (see Utility Model Application Publication No. 1-147314). But the crown A pulley with a belt conveyor is not effective unless the length of the belt conveyor is at least 6 times the width of the machine. Furthermore, if the meandering prevention device 1 is used, there is a risk of damaging the side edges of the belt 2. Ta.

0003 Conventionally, a meandering correction roller has been used as a means to prevent meandering without such adverse effects. A meandering prevention device using a roller has been developed (Japanese Patent Application Laid-open No. 180615/1983). mosquito As shown in FIG. 5, this meandering prevention device presses a meandering correction roller 3 onto a belt 4. If the belt 4 meanders, the roller 3 is tilted to return the belt 4 to its original position. That is. This device can detect potentiometers, phototube switches, etc. The meandering of the belt 4 is detected by the output device 5, and the controller 6 now controls the roller tilting drive device (e.g. air cylinder) 7. ing.

0004

[Problem that the idea aims to solve]

The conventional meandering prevention device of the type shown in Fig. 5 uses a meandering correction roller to It is possible to effectively prevent and correct meandering. However, this device In addition to the meandering correction roller, we also provide a drive device for roller tilting, a belt meandering detector, and a controller. It has an extremely complex configuration, including trollers and the like. In addition, these components Because they can be assembled individually, installation, adjustment, and maintenance require considerable effort. was needed.

[0005] Therefore, the purpose of this invention is to solve such conventional technical problems. An object of the present invention is to provide a meandering prevention device for a belt conveyor.

[0006]

[Means to solve the problem]

In order to achieve the above purpose, the meandering prevention device according to the present invention is used for belt conveyors. a base plate disposed perpendicularly to the belt traveling direction at appropriate locations; The first arm is pivotally supported at each end of the base plate and extends forward in the belt traveling direction. and a second arm extending toward the centerline of the belt. is attached to the tip of the first arm of the bell crank, and is attached to the tip of the first arm of the bell crank, and A meandering detection roller arranged so that side edges thereof are in contact with each other, and the meandering detection roller a spring means provided such that the springs approach each other; and A stopper means for holding the bell crank in place and a stopper means for holding the bell crank in a predetermined position and the second arm of the bell crank, which is arranged orthogonally and has a corresponding shaft end; The belt is pivotally supported at the tip of the belt, and is in contact with the belt with a constant pressure. It is characterized by consisting of a meandering correction roller.

[0007]

[Effect]

In the above configuration, when the belt snakes and comes into contact with the meandering detection roller on either the left or right side, This roller is then pushed in a meandering direction and the associated bell crank is rotated. this At this time, the belt is not in contact with the other roller, and the spring means and stopper means are not in contact with each other. The other bellcrank is held in its initial position. Therefore, the belt on the meandering side Due to the rotating movement of the rank, the meandering correction roller is tilted in the opposite direction to the meandering direction. . As a result, the meander correction roller forces the belt to meander in the opposite direction and return it to its original position. It can be returned to the original position.

[0008]

【Example】 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0009] 1 to 3 show a meandering prevention device for a belt conveyor according to the present invention. , numeral 10 is a meandering detection roller with a groove for detecting meandering of the belt 11. Reference numeral 12 is a meandering correction roller for correcting the meandering of the belt 11.

0010 The meandering detection roller 10 is located below the belt 11 in the belt traveling direction (arrow A direction). At both ends of the base plate 13 disposed perpendicularly to the Supported by 14. The bell crank 14 is pivotally connected to the base plate 13. A first arm 16 extends forward from the fulcrum 15 along the direction of movement of the belt 11; a second arm 17 extending inward from the fulcrum 15 toward the center line of the belt 11; The meandering detection roller 10 is rotatably supported at the tip of the first arm 16. held. The bracket 18 fixed to the rear surface of the base plate 13 and the bell A tension spring (spring means) 19 is disposed between the crank 14 and the second arm 17. The second arm 17 is always pulled backward, and the left and right rollers 10 are aligned with each other. I'm trying to get closer. In addition, a stopper pin ( A stopper means) 20 is protruded, and the second arm is stopped during normal operation of the belt conveyor. The arm 17 is held in contact with this stopper pin 20 in the posture shown in FIGS. 1 and 2. It looks like this. In this state, the belt is in the groove of each meandering detection roller 10. The side edges of No. 11 fit together.

[0011] On the other hand, the belt meandering correction roller 12 is rotatably supported by a roller shaft 21. Each shaft end of the roller shaft 21 is connected to the bell crank 14 on the corresponding side. is attached to the second arm 17 of , via a support member 22 . The support member 22 is It is pivotally supported at the tip of the second arm 17. Also, one side of the roller shaft 21 (in the figure The left side) shaft end is fixed to the support member 22, and the other shaft end is fixed to the axial direction of the roller 12. The support member 22 is attached to the support member 22 so as to be slidable therein. beltco During normal operation of the conveyor, as shown in Figures 1 and 2, the meandering correction roller 12 is It is perpendicular to the traveling direction of the belt 11, and is in contact with the lower surface of the belt 11 with a predetermined pressure. It is arranged so that

0012 Next, we will explain the operation of the meandering prevention device according to the present invention in such a configuration. I will clarify.

[0013] First, when the belt 11 is in a normal state with no meandering or deviation, the meandering correction roller 12 receives the reaction force of the belt 11 and stabilizes in a state perpendicular to the direction of belt movement. ing.

[0014] On the other hand, if the belt 11 meanders to the left as shown in FIG. The side edge of the left bell crank 14 pushes the left meandering detection roller 10 to the left. is rotated counterclockwise about its pivot point 15. As a result, the left berg The tip of the second arm 17 of the rank 14 moves forward and touches the left shaft end of the roller shaft 21. push forward. At this time, the right bell crank 14 is moved by the tension spring 19. Since the roller shaft 21 is maintained in contact with the topper pin 20, the roller shaft 21 is supported on the right side. The member 22 is tilted clockwise about the pivot point 23. Belt 11 meandering correction Due to the contact pressure of the roller 12, the belt 11 tends to be perpendicular to the roller 12. is acted on by a corrective force that tilts it to the right, and moves to the right.

[0015] When the belt 11 begins to move to the right, the meandering correction roller 12 absorbs the belt reaction force and It returns to its original position by the spring force of the left tension spring 19. During this time, the left Since the meandering detection roller 10 is always in contact with the left edge of the belt 11, Even if the motor vehicle 11 meanders to the left, it is possible to quickly react to the meandering. . In this way, when the belt 11 returns to its normal position without deviation, the belt 1 1 and roller 12 are again in a stable orthogonal state.

[0016] Even if the belt 11 meanders to the right, the device's action is basically to meander to the left. Same as row. To put it simply, if the belt 11 shifts to the right, the right side The meandering detection roller 10 is pushed rightward, causing the right bell crank 14 to move clockwise. Due to the rotation, the meandering correction roller 12 is centered around the pivot point 23 of the left side support member 22. The belt 11 is tilted counterclockwise to forcibly move the belt 11 to the left.

[0017] In the above embodiment, the meandering detection roller 10 is always in contact with the side edge of the belt 11. However, a gap is provided between the belt 11 and the belt 11 to prevent meandering within the allowable meandering amount. The line correction roller 12 may not be tilted. This gap adjustment can be done easily. In order to It is preferable to provide multiple holes (not shown) or to use elongated holes extending laterally. be.

[0018] Furthermore, since the distance between the second arms 17 changes when the bell crank 14 rotates, The shaft end of the roller shaft 21 can be slid against one of the supporting members 22. However, the roller shaft 21 itself or the space between the meandering correction roller 12 and the roller shaft 21 can be expanded and contracted. If a nested structure is possible, both ends of the roller shaft 21 can be fixed to the support member 22. You can also do that.

[0019]

[Effect of the idea]

As mentioned above, the belt conveyor meandering prevention device according to the present invention is a mechanical one. Due to its simple structure, adjustment and maintenance are easy.

[0020] In addition, all components are integrated on the base plate, making installation and replacement easy. It is easy to install and can be easily installed at the desired position on the belt conveyor due to its miniaturization. becomes possible.

[0021] Furthermore, in the meandering prevention device of the present invention, when the belt meanders significantly, The line correction roller also tilts greatly and applies a large correction force to the belt, so the belt meandering can be quickly corrected.

[0022] The belt conveyor meandering prevention device according to the present invention uses meandering correction rollers. This type of belt can extremely effectively prevent and correct belt meandering and deviation. Of course.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a meandering prevention device for a belt conveyor according to the present invention.

FIG. 2 is a plan view showing the meandering prevention device of FIG. 1 in normal operation.

3 is a plan view showing the meandering prevention device of FIG. 1 when the belt meanders to the left; FIG.

FIG. 4 is a perspective view showing a conventional meandering prevention device using a meandering prevention tool.

FIG. 5 is a schematic plan view showing a conventional meandering prevention device using a meandering prevention roller.

[Explanation of symbols]

10 Meandering detection roller 11 Belt 12 Meandering correction roller 13 Base plate 14 Bell crank 16 1st arm 17 Second arm 19 Tension spring (spring means) 20 Stopper pin (stopper means) 21 Roller shaft 22 Support member

Claims (1)

[Scope of utility model registration request] 1. A base plate disposed perpendicularly to the belt traveling direction at an appropriate location on a belt conveyor, a first arm pivotally supported at both ends of the base plate and extending forward in the belt traveling direction, and a first arm extending forward in the belt traveling direction; a bell crank comprising a second arm extending toward the centerline;
A meandering detection roller attached to the tip of the first arm of the bell crank and arranged so that a side edge of the belt comes into contact with it; and a spring means provided so that the meandering detection roller approaches each other. a stopper means for holding the bell crank in a predetermined position against the spring force of the spring; Second
A meandering prevention device for a belt conveyor, comprising a meandering correcting roller that is pivotally supported at the tip of an arm and is in contact with the belt with a constant pressure.