JP3379286B2 - Pulley for conveyor device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulley for a conveyor device used for transporting crushed materials and the like, and more particularly to a pulley suitable for use in a mechanical unloader unloaded from a ship. The present invention relates to a simple pulley for a conveyor device. 2. Description of the Related Art Conventionally, a conveyor apparatus for transporting bulk materials such as coal and ore is composed of a conveyor belt, a pulley having a cylindrical medium-high structure for changing the direction of the conveyor belt, and a driving pulley. Have been. The conveyor belt moves around according to the rotation of the pulley, and the pulley uses a middle-high structure to prevent the conveyor belt from meandering when rotating the conveyor belt. However, bulk materials such as coal and ore are sometimes scattered around the conveyor device during transportation due to their properties. For this reason, loose pieces scattered around the conveyor apparatus often enter between the conveyor belt and the pulley during transportation, and as a result, the conveyor belt is stressed and the conveyor belt is sometimes damaged. Also, even if the conveyor belt is not damaged, the loose material enters between the conveyor belt and the pulley, changing the radius when the conveyor belt is wound around the pulley, causing the conveyor belt to meander while transporting. Was. [0003] In order to prevent the conveyor belt from meandering or breaking even if a loose object enters between the conveyor belt and the pulley, a plurality of narrow prisms 4 are formed on the outer peripheral surface of the pulley 2 as shown in FIG. There is an example of a cage type structure in which a groove 5 is provided by disposing a groove. Also, to prevent the conveyor belt 1 from meandering,
The diameter of the central portion in the length direction of the pulley 2 having the cage structure was made larger than the diameter of both ends of the pulley 2 so that the overall shape of the pulley 2 became the middle height. As a result, in the conveyor device having the pulley 2 having the cage structure, even if the bulk material 3 enters the conveyor belt 1 and the pulley 2, the bulk material 3 enters the groove 5, so that unnecessary stress is applied to the conveyor belt 1. Therefore, it is possible to prevent the conveyor belt 1 from being damaged. Further, since the pulley itself has a shape maintaining the middle height, the belt is self-centered, thereby preventing the meandering from occurring. [0004] However, when a pulley having a cage structure is used, when a loose material having a particle size smaller than a groove enters between the conveyor belt and the pulley, the conveyor belt is not removably mounted. Although it can prevent meandering and breakage, if loose material with a particle size larger than the groove enters between the conveyor belt and the pulley, the loose material will enter the groove and the loose material will not come off the groove. Rotates with the pulley. As a result, when the conveyor belt comes into contact with the bulk material, stress is locally applied to the conveyor belt, and the conveyor belt is damaged early. Further, even if the pulley does not break, the self-centering function of the pulley's middle-high structure does not work, and the conveyor belt meanders. In addition, the bulky thing bites into the groove,
There is a drawback that the thin prisms forming the groove are damaged, and various costs such as transportation costs and repair costs for the conveyor device are increased. The present invention pays attention to the above-mentioned conventional problems, and firstly prevents the loose objects from entering between the conveyor belt and the pulleys. Pulley for conveyor device to prevent indentation and fixing,
Second, to provide a pulley for a conveyor device capable of efficiently moving loose materials into a pulley or discharging loose materials from the inside of a pulley by widening an interval between rollers having a middle-high structure toward a roller end. With the goal. In order to achieve the above-mentioned object, a pulley for a conveyor device according to the present invention is a pulley for changing the direction of a conveyor belt, and a plurality of rotatable pulleys are provided on the outer peripheral side of a shaft. A roller having a middle-high structure is arranged, and the gap between the rollers is widened toward the end. According to the above construction, the conveyor belt is composed of a plurality of pulleys and a driving pulley for changing the direction of the conveyor belt. By rotating the driving pulley, the conveyor belt also rotates, and the outer periphery of the conveyor belt is rotated. The bulk material can be transported by placing the bulk material on the section. At this time, in order to prevent meandering and breakage of the conveyor belt due to loose materials entering between the conveyor belt and the pulley, the pulley connects rotatable side end plates and side end plates installed at both ends of the shaft, A plurality of rollers having a rotatable intermediate / high-level structure are arranged concentrically on the outer periphery of the shaft. Here, even if loose materials enter between the conveyor belt and the pulley, when the conveyor belt winds around the pulley, the difference in rotation between the roller that is in contact with the conveyor belt and the adjacent roller that is not in contact with the conveyor belt Occurs, preventing the entry of loose objects. Even if loose objects once enter between the conveyor belt and the pulley, when the loose objects enter, the difference in rotation between the rollers reduces the force with which the loose objects bite and settle between the rollers. When the roller and the pulley are separated from each other, a difference in rotation occurs between the rollers, so that loose objects do not bite into and are fixed to the pulley, and meandering and damage of the conveyor belt can be prevented. Even if loose material enters the inside of the pulley from the gap between the rollers, the centrifugal force due to the rotation of the pulley itself and the gap between the rollers are wider at the end, so the loose material that has entered the inside of the pulley can efficiently escape to the outside of the pulley It becomes possible to discharge. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of a pulley for a conveyor device according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a structural explanatory view of a pulley for a conveyor device according to an embodiment, and FIG. 2 is a front view and a partially developed view of the pulley for the device. First, as shown in FIG. 1, the conveyor device includes a conveyor belt 1, a plurality of pulleys 2 for changing the direction of the conveyor belt 1, and a driving pulley 9. Here, the conveyor belt 1 moves around in accordance with the rotation of the driving pulley. Therefore, if the bulk material 3 is placed on the outer peripheral portion of the conveyor belt 1, the bulk material 3 can be transported. The plurality of pulleys 2 for changing the direction of the conveyor belt 1 are rotated by the conveyor belt 1 as described above, and a shaft 7 is provided at the rotation center of the pulley 2. Is provided with a protective cover drum 8 for preventing the pulleys from being damaged by the loose objects 3, and both ends of the shaft 7 are fixed to guides 10 on both sides, respectively. Here, the guide 1 on both sides of the shaft 7
By moving the zero portion and providing the tension pulley 18, the tension applied to the conveyor belt 1 can be adjusted optimally. In the shaft 7, a pulley 2 is provided inside the guide 10 that fixes the shaft 7.
A side end plate 11 having a diameter substantially equal to the diameter of the shaft is provided at both ends, and the side end plate 11 has a structure capable of rotating around the shaft 7. A plurality (twelve in this embodiment) of rotation transmission pins 12 are implanted in an outer peripheral portion of the side end plate 11 so as to face each other, and the rotation transmission pins 12 come into contact with the conveyor belt 1 and change the direction of the conveyor belt 1. The middle and high rollers 6 fitted on the rotation transmitting pins 12 so as to connect the two side end plates 11 are provided on the same circumference in parallel with the pulley rotation axis. The middle and high rollers 6 are provided with rotation transmitting pins 12.
The barrel is shaped like a barrel with both ends into which it is fitted and having the maximum thickness at the center, and the middle and high rollers 6 are close to each other at the middle and middle positions, and the rotation transmitting pins 12 implanted in the side end plates 11 It is possible to rotate around the center. When the envelope of the plurality of middle-high rollers 6 is traced, the pulley 2 has a middle-high shape. FIG. 3 shows an example in which the aforementioned pulley for a conveyor device is applied to a mechanical continuous unloader that unloads bulk materials 3 such as coal and ore from a ship 13. Since the mechanical continuous unloader needs to transport the bulk material 3 in the vertical direction, a plurality of fins 14 are provided on the outer peripheral portion of the conveyor belt 1 of the conveyor device. By placing the bulky items 3 on the fins 14, the conveyor apparatus can transport the bulky materials 3 in the vertical direction. As shown in FIG. 3, a boom 15 is provided outside the boat 13 and a bucket wheel having a rotatable disk and a bucket 16 for scraping loose pieces 3 attached to the end of the boom 15. 17 is attached. The bulk 3 loaded on the ship 13 is the bucket wheel 1
7 is rotated and the boom 15 is operated and moved to be scraped off. And the scraped pieces 3
Is placed on a conveyor device using middle and high rollers 6 near the bucket wheel 17 and transported outboard. However, when the bucket wheel 17 is
When scraping, all the bulk materials 3 are not loaded and conveyed on the conveyor device using the middle and high rollers 6, but are instead scraped by the bucket wheel 17 and then conveyed using the middle and high rollers 6. There is a bulk material 3 which is going to enter between the conveyor belt 1 and the pulley 2 of the apparatus. At this time, those having a particle size smaller than the gap between the middle and high rollers 6 move from the gap between the middle and high rollers 6 to the inside of the pulley 2. For this reason, the loose objects 3 do not get caught between the pulley 2 and the conveyor belt 1, and meandering and damage of the conveyor belt 1 due to the intrusion of the loose objects 3 can be avoided. Further, since the side end plate 11 holding both ends of the middle and high rollers 6 rotates about the shaft 7 at the center of the side end plate 11, the bulk material 3 having a small particle size moved into the pulley 2 is removed by the side end plate 11. It is discharged to the outside of the pulley 2 without stagnation due to the centrifugal force caused by the rotation of the pulley. When the particle size of the bulk material 3 is larger than the gap between the middle and high rollers 6, two types of cases occur. First,
When the loose material 3 tries to be caught between the conveyor belt 1 and the pulley 2, the loose material 3 is broken by the pressure between the conveyor belt 1 and the pulley 2, and the particle size becomes smaller. Is the case. In this case, the same result as in the case where the particle diameter is smaller than the gap between the middle and high rollers 6 described above is obtained, and meandering and damage of the conveyor belt 1 due to the intrusion of the bulk material 3 are avoided. Secondly, when the bulk material 3 is not crushed by the pressure between the conveyor belt 1 and the pulley 2,
This is the case where the bulk material 3 is larger than the gap between the middle and high rollers 6 even after being crushed. In this case, the conveyor belt 1
The loose object 3 is placed on the inner side of the sheet, and the loose object 3 moves toward the pulley 2 by the rotation of the conveyor belt 1. Then, as the space between the conveyor belt 1 and the pulley 2 becomes narrower, the loose objects 3 tend to bite into the gap between the two middle and high rollers 6.
Since the middle and high rollers 6 are rotatable, the middle and high rollers 6 that come into contact with the conveyor belt 1 start rotating when they come into contact with the conveyor belt 1. At this time, there is a difference in the rotation speed between the adjacent rollers 6 having a middle-high structure, and the bulk material 3 having entered between the middle-high rollers 6 is pushed out of the pulley 2 by the rotation of the middle-high roller 6. The bulk material 3 pushed out of the pulley 2 tries to enter the gap between the next middle and high rollers 6, but is pushed out of the pulley 2 again by the same operation of the middle and high rollers 6. Therefore, the loose objects 3 do not get caught between the conveyor belt 1 and the pulleys 2, so that meandering and damage of the conveyor belt 1 due to the intrusion of the loose objects 3 can be avoided. Even if the bulk material 3 once gets into the gap between the middle and high rollers 6 and enters between the conveyor belt 1 and the pulley 2, when the jamming starts,
, The loosening force of the loose material 3 in the gap between the middle and high rollers 6 is reduced, and the conveyor belt 1 and the pulley 2
Is separated, the rotational speed again becomes different between the adjacent middle and high rollers 6.
Can be prevented from being established. Therefore, even in such a case, meandering or damage of the conveyor belt 1 due to the intrusion of the loose objects 3 can be avoided. Further, since the middle and high rollers 6 have a barrel shape, the gap between the middle and high rollers 6 is not equal, but is narrow at the center of the pulley 2 and widens toward the end. Thus, the bulk material 3 having a wider particle size can be transferred to the middle-high roller 6.
Between the conveyor belt 1
And the pulley 2 can be prevented from being jammed. Further, when discharging the bulky material 3 having a small particle diameter moved into the pulley 2, the pulley 2 itself has a large gap due to centrifugal force because the pulley 2 itself rotates separately from the middle and high rollers 6.
Since a large amount can be discharged from the end, the bulk material 3 can be efficiently moved and discharged. As described above, the conveyor pulley according to the present invention has a plurality of rotatable rollers having a medium-high structure arranged on the outer periphery of the shaft, so that the conveyer belt and the pulley can be separated. Prevents loose objects from entering,
Further, even if the bulk material enters, an effect of preventing the bulk material from being caught and fixed on the pulley can be obtained. In addition, since the gap between the rollers is made wider toward the end, the effect that the bulk material can be moved into the pulley or the bulk material can be efficiently discharged from the pulley can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural explanatory view of a conveyor device pulley according to an embodiment. FIG. 2 is a front view and a partially developed view of the device pulley. FIG. 3 is an explanatory diagram of a use state of the device. FIG. 4 is a structural diagram of a conventional conveyor device. [Description of Signs] 1 Conveyor belt 2 Pulley 3 Bulk material 4 Thin prism 5 Groove 6 Middle and high roller 7 Shaft 8 Protective cover drum 9 Drive pulley 10 Guide 11 Side end plate 12 Rotation transmission pin 13 Ship 14 Fin 15 Boom 16 Bucket 17 Bucket Wheel 18 tension pulley

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 23/04-23/06 B65G 39/00-39/20

Claims (1)

(57) [Claim 1] In a pulley for changing the direction of a conveyor belt, a plurality of rollers having a rotatable middle-high structure are arranged on the same circumference on the outer peripheral side of the shaft. Pulley for conveyor equipment.