Device for preventing belt from rising and suppressing belt meandering in belt conveyor

Abstract

To prevent failure of a meander prevention function and falling of conveyed objects due to floating of a belt in a belt conveyor.SOLUTION: A belt floating prevention and meander suppression device in a belt conveyor comprises: a pair of vertical column materials 7 on both sides of carrier rollers 2 in a belt conveyor A; lifting frames 3 for moving up / down along both vertical column materials 7; carrier roller stands 4 and the carrier rollers 2 provided at the lifting frame 3; a rotary body 10 provided being supported by the vertical column materials 7 for preventing floating of a carrier side belt 1; and traction means C for applying lifting force to the lifting frames 3 by tractional force a little stronger than a total of weight of the lifting frame 3 and weight on the carrier roller 2 side.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] This invention relates to a device that follows the belt to prevent the belt from rising and suppresses the belt's serpentine movement (eliminates the load drop caused by the serpentine movement) with respect to the belt's rising in a belt conveyor.

Background Art

[0002] In belt conveyor equipment, when transferring to the next line, the conveyor belt may tilt significantly and eventually rise while making an arc with the horizontal part because the head pulley or a pulley equivalent to it (for example, a tripper section having means for switching the conveying path in the middle) raises the pulley to switch the path.

[0003] In many cases, the plan is made so that the shape of the conveyor frame follows the raised belt, and rollers are arranged.

[0004] However, even when the belt is in contact with the rollers during loading, the belt may rise when it is unloaded or when the amount of conveyed material (the load weight on the carrier side) frequently changes (such as when the supply of the conveyed material is interrupted). Also, sometimes the belt may not be in contact with the rollers arranged as planned.

[0005] Therefore, as a method of pressing down the belt on the carrier side to prevent the belt from rising, for example, a method of pressing down with both sides of the upper surface of the belt and left and right wheels (Patent Document 1) and a method of pressing down with rollers whose rotating support shafts are horizontal (Patent Document 2) are known.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0007] By the way, according to the method of Patent Document 1, the floating of the belt is suppressed by pressing both side edges of the upper surface of the carrier-side belt with the left and right rotating wheels. Also, according to the method of Patent Document 2, the floating of the belt is suppressed by a single horizontal roller crossing over the carrier-side belt.

[0008] However, neither method is perfect. Depending on the height and position of the belt when the pressing rotating wheel or roller is installed, there is a problem that the pressing rotating wheel or roller interferes with the conveyed object, causing complicated unloading.

[0009] Also, although it is considered to perform level adjustment according to the passing state of the load, there is no method that can suitably respond to the change in the position of the belt during loading and unloading. The belt often separates from the rotating wheels or rollers on the carrier side and floats, which is a major cause of belt meandering.

[0010] And when the belt meanders in a floating state, the conveyed object may be unloaded during conveyance.

[0011] There is a problem that the belt cannot prevent meandering and prevent the unloading of the conveyed object by floating up. Therefore, the present invention aims to eliminate the above-mentioned problems.

Means for Solving the Problems

[0012] To solve the above problems, the present invention provides a pair of parallel opposing vertical column members provided on both sides of the arrangement position of the carrier rollers in the belt conveyor, and a lifting frame provided so that sliders at both ends are slidably engaged with vertical guide rails provided on both vertical column members to move up and down. Between both ends of this lifting frame, on the carrier roller stand provided Supporting the above carrier rollerA carrier roller that supports both ends of the center shaft in a non-rotating state and supports the carrier side belt of the belt conveyor, and a rotating body provided by being supported by the vertical column member so as to prevent the carrier side belt from rising. And The lifting frame , the above slider, the above carrier roller stand And the carrier roller Of Total weight The pulling force to raise The lifting frame Attach to Adopt a configuration consisting of traction means provided to give.

Effect of the Invention

[0013] As described above, according to the belt floating prevention and snake movement suppression device in the belt conveyor of the present invention, the lifting frame having the carrier roller for supporting the carrier side belt is moved up and down by the guide rail of the vertical column member and the slider slidably engaged with this guide rail. Therefore, when the carrier side belt is unloaded, there is no load pressing the carrier side belt, so at least the belt will float up.

[0014] At this time, the traction means applied to the lifting frame causes the lifting frame to rise, and the carrier roller and the belt come into contact with each other, so there is no snake movement of the carrier side belt under no-load conditions.

[0015] When there is a conveyed object on the carrier side belt, the lifting frame descends together with the carrier side belt against the traction force, and the conveyed object can be stably conveyed, and the spillage of the conveyed object can be eliminated.

[0016] Therefore, when the conveyed object on the carrier side belt disappears or is interrupted, the lifting frame always follows the carrier side belt that floats up with tension and is in contact with the carrier roller, so the wobbling caused by the belt floating up can be prevented, and there is a specific effect of eliminating the snake movement of the belt.

[0017] In addition, since it does not press the belt like the conventional countermeasure methods, it does not apply a load to the belt, and the position of the carrier roller follows according to the upper and lower sides of the belt, so there is an advantage that the durability of the belt is greatly improved without applying an excessive load to the belt.

[0018] Furthermore, different from the conventional countermeasure methods, the state where the carrier side belt and the carrier roller are always in contact can be maintained, so that the method of suppressing meandering using a carrier idler in a normal conveyor can be used, or the type of roller can be changed. That is, for example, a forward tilt stand can be used to further suppress meandering, or by making it a garland, the belt and the roller can be brought into contact more to enable stable running, or by changing the roller to an impact roller, it can be made more resistant to impact, or additional functions used in a normal conveyor can be added.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Modes for Carrying Out the Invention

[0020] Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In the figure, A is a belt conveyor.

[0021] As is well known, the above-mentioned belt conveyor A has an endless belt 1 stretched between a head pulley and a tail pulley (both not shown), and the carrier-side back surface of the belt 1 is supported by carrier rollers 2 at scattered positions, and the return-side surface of the belt 1 is supported by return rollers (not shown) at scattered positions.

[0022] As is well known, the carrier rollers 2 supporting the carrier-side belt 1 are arranged in a trough shape with a horizontal center roller as shown in the figure and a pair of side rollers with an upward slope from the inner end to the outer end on both sides of this center roller to prevent the conveyed material B from spilling.

[0023] Further, both ends of the above-mentioned carrier roller 2 are supported by fitting and engaging both ends of the center shaft 5 of each carrier roller 2 in a non-rotating state on a stand 4 that stands up from an elevating frame 3 whose both ends face in the left-right direction (using fixing means such as welding).

[0024] Furthermore, on the outer sides of both ends of the above-mentioned elevating frame 3, a pair of vertical column members 7 that stand up from a conveyor frame 6 are provided, and sliders 9 provided at both ends of the elevating frame 3 are slidably engaged with vertical guide rails 8 provided along the entire length of each vertical column member 7 (in the figure, cylindrical sliders 9 provided at both ends of the elevating frame 3 are fitted into the vertical guide rails 8), so that it can move up and down.

[0025] Also, above the carrier-side belt 1, a rotating body 10 for preventing the carrier-side belt 1 from lifting is provided.

[0026] In the case shown in FIGS. 1, 2, 3, and 4, the center shaft 12 of the pressing roller is engaged and supported by brackets 11 provided at the upper ends of the left and right vertical column members 7. However, it is not limited thereto. For example, as shown in FIG. 6, both ends of the shaft member 14 are supported by support members 13 provided at the upper ends of both vertical column members 7, and both ends of the center shaft 16 of the wheel as the rotating body 10 are supported at the lower ends of a pair of two parallel arms 15 that support the upper end sides at both ends of this shaft member 14. When the conveyed object B on the belt 1 decreases or when there is an empty load, the belt 1 floats (this occurs when the lifting frame 3 rises during this floating), and the rotating body 10 presses and blocks the belt 3. Then, the meandering of the belt 3 is suppressed, and the spillage of the load is suppressed.

[0027] Furthermore, there is provided a traction means C that applies an upward force to the lifting frame 3 by a traction force that is slightly stronger than the total weight on the side of the lifting frame 3 and the carrier roller 2.

[0028] The above-described traction means C is provided with a traction means C for causing an upward pushing force to act on the lifting frame 3 when there is a significant decrease in the conveyed object B on the carrier-side belt 1 or when there is an empty load (due to the supply of the conveyed object B being interrupted).

[0029] As the above-described traction means C, for example, as shown in FIGS. 1, 2, 3, 4, and 6, a pulley 17 in the middle of the vertical column member 7, a rope 18 that engages with an intermediate reversing portion of this pulley 17, and one end of this rope 18 are respectively connected to the lifting frame 3 and the other end to a weight 19. By forming in this way, an upward traction force acts on the lifting frame 3, and it becomes possible to appropriately respond to the change in the position of the belt 1 between when the belt 1 is loaded and when it is unloaded.

[0030] Naturally, when the belt 1 meanders in a lifted state, if it is during conveyance, the conveyed object will be prevented from falling off.

[0031] In addition, as the traction means C other than the above, as shown in FIG. 7, the middle of a rope 18 having one end connected to the lifting frame 3 is reversed by a pulley 17, and the terminal of a spring 20 connected to the other end of the rope 18 is locked to a stopper 21 of the conveyor frame 6, so that the spring 20 serves as a traction means C equivalent to the weight 19.

[0032] Then, the stable running of the belt 1 is ensured, and the belt 1 is prevented from lifting off the carrier roller 2, so that the spillage and meandering of the conveyed object can be eliminated.

[0033] In the case shown in the figure, the lifting frame 3 of the belt conveyor A is arranged only in the horizontal case, but it is not limited thereto. For example, it can also be used for an ascending inclined belt conveyor or a belt conveyor with a tripper where the carrier side belt is likely to lift. In the figure, reference numeral 25 is the support shaft of the pulley.

Description of Reference Numerals

[0034] A Belt conveyor B Conveyed object C Traction means 1 Belt 2 Carrier roller 3 Lifting frame 4 Stand 5 Center shaft 6 Conveyor frame 7 Vertical column member 8 Vertical guide rail 9 Slider 10 Rotating body 11 Bracket 12 Center shaft 13 Support member 14 Shaft material 15 Arm 16 Shaft material 17 Pulley 18 Rope 19 Weight 20 Spring 25 Support shaft

Claims

【Claim 1】 A pair of parallel and opposing vertical column members provided on both sides of the arrangement position of the carrier rollers in the belt conveyor, a lifting frame provided such that sliders at both ends are slidably engaged with vertical guide rails provided on both of these vertical column members to move up and down, carrier rollers that support the carrier side belt of the belt conveyor by supporting both ends of the center shaft that supports the carrier rollers on a carrier roller stand provided between both ends of this lifting frame in a non-rotating state, a rotating body supported by the vertical column members so as to prevent the carrier side belt from lifting, and traction means provided to apply a traction force for lifting the total weight of the lifting frame, the sliders, the carrier roller stand, and the carrier rollers to the lifting frame. A device for preventing belt lifting and suppressing belt meandering in a belt conveyor, characterized by comprising these components.

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