JP2019127383A - Belt cleaner holding device - Google Patents

Abstract

To solve a problem of a conventional belt cleaner whose configuration is such that it was not possible to adjust a contact state between a chip and a return belt surface while observing a scraping status, with a belt conveyor running, and to ensure safety, it was necessary to stop operation while adjusting the belt cleaner, and it was necessary to operate and stop the conveyor many times, resulting in lost production opportunities and poor adjustment.SOLUTION: There is provided a belt cleaner holding device for holding a support pipe attached to both ends of a frame. The holding device includes a cradle and a cradle base. The cradle further includes a cylindrical base cut perpendicular to an axial direction. The support pipe is clamped with a pedestal and a grip plate for fixing. The cradle base further includes vertical and horizontal plates, and by storing the cradle in a cylindrical guide fixed to the horizontal plate and moving a height adjustment bolt attached to the horizontal plate up and down, the cradle is guided with the cylindrical guide, to raise and lower the cradle and raise and lower the support pipe and belt cleaner.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a belt cleaner holding device for attaching a belt cleaner to a conveyor base in a belt cleaner that scrapes off deposits adhering to the surface of a return belt of a belt conveyor used for transporting raw materials.

In the belt conveyor, normally the conveyed product is carried on a carrier belt (conveying side belt), discharged on the driving pulley side and becomes a return belt (returning side belt) and returns to the driven pulley, but the adhering to the return side belt surface. There is a problem that an object (adhesion to the belt) falls halfway and deposits under the return side belt. Further, there has been a problem that the adhered matter causes the return roller and the snap pulley to be worn, and the adhered matter adheres to these rollers and causes the return side belt to meander.

The transport material deposit that has fallen under the return belt is regularly collected, but it falls and accumulates over the entire length of the return belt, which is very labor intensive and expensive. . In order to scrape off the adhering matter on the return side belt, a scraper method such as a scraper method, a brush method, or a cleaning method is installed, but a scraper method with a simple structure and easy management is often used.

In the scraper type belt cleaner, the scraping part is constantly pressed against the belt with an appropriate pressing force in order to efficiently scrape the adhered matter on the belt. Gradually, scraping performance decreases. Therefore, it is necessary to periodically stop the operation of the belt and adjust the scraper to properly press the belt surface. However, stopping the belt conveyor, which is a mass transportation facility, for the belt cleaner adjustment is a great loss of production opportunity. In addition, since the space under the return belt is narrow, the operator's range of action is limited, and it is possible to perform precise installation work and adjustments to make full use of the function of the belt cleaner, despite work that requires accuracy. It was not. Further, even if the scraping portion and the pressing force of the belt are adjusted while the belt is stopped, when the belt is actually operated, the scraped state may remain insufficient. In addition, the support pipes provided at both ends of the belt cleaner mount can not be firmly attached to the belt cleaner holding device, and there is a problem that the belt cleaner rotates.

In Japanese Patent Application Laid-Open No. 2015-174702, a support shaft having a square cross section is joined to both ends of a gantry, and the support shaft is placed on a grooved receiver attached to a support bracket so that the height can be adjusted. As the groove type receiver, a belt cleaner is proposed in which an adjusting bolt for adjusting the height of the rack and a side fixing bolt for fixing the support shaft are attached. In this method, since the support shaft is a square pipe, the scraping portion can not be rotated, so that the angle adjustment between the scraping portion and the belt can not be performed.

In Japanese Laid-Open Patent Publication No. 2006-000645, support metal fittings are disposed at both ends in the width direction of the return side belt, and a groove-type support whose height is freely adjustable is attached to the support metal with positioning bolts. A method has been proposed in which a round pipe fitted with a frame is placed, and the height of the belt cleaner is adjusted by raising the round pipe with a height adjusting bolt on the lower surface of the grooved receiving member. In this method, before adjusting the height with the height adjustment bolt, it is necessary to loosen the fixing of the groove-shaped support and the support bracket, and for safety reasons, it is impossible to adjust the height of the belt cleaner while the belt is operating. The

In Japanese Patent Application Laid-Open No. 2017-071453, support pipes attached to both ends of a gantry are sandwiched between pipe clamps each formed by a U-bolt welded to the inside of a groove base and a pipe presser plate fitted to the U-bolt. There has been proposed a method of adjusting the height of the belt cleaner by means of a height adjustment bolt for height adjustment which is fixed and receives the bottom plate load of the pipe clamp stand. In this method, the height of the belt cleaner can not be adjusted unless the clamping bolt attached to the side of the grooved base is loosened and released from the pipe clamp stand. For this reason, height adjustment of the belt cleaner during belt operation has been impossible from the viewpoint of safety.

Japanese Unexamined Patent Publication No. 2015-174702 Japanese Patent Application Laid-Open No. 2016-000645 Japanese Unexamined Patent Publication No. 2017-071453

The present invention solves the following problems. (1) The height of the belt cleaner can be adjusted during operation without stopping the belt conveyor, and the optimum contact state between the tip and the return side belt surface can be set while observing the scraping status. Make it (2) The restraint force generated by the moment when the parallelism of the holding device deviates with respect to the width direction of the return side belt is eliminated. (3) When raising the cradle with the height adjustment bolt, raise the cradle smoothly. (4) To prevent the holding force of the holding device from decreasing while the belt conveyor is in operation. (5) The pressing force of the scraping portion is reduced, and the scraping performance is not reduced. (6) Allowing the on-site installation of the belt cleaner to be performed safely and in a short time. (7) Make the mounting portion of the belt cleaner compact so that it can be mounted in a narrow space.

According to a first solution, as shown in claim 1, belt cleaners in which scrapers are arranged on a gantry arranged in the width direction of the return side belt are provided with support pipes attached to both ends of the gantry. In the belt cleaner holding device for holding and fixing to the lower surface of the return side belt, the belt cleaner holding device comprises a cradle and a cradle base, and the cradle cuts the pipe at right angles to the axial direction. The cylindrical base is provided with a bottom plate on the lower end surface of the cylindrical base, and on the upper end surface of the cylindrical base are two seats for receiving the semicircular support pipe larger than the outer diameter of the support pipe. A squeezing plate that clamps the support pipe and presses it against the seat; and a clamping bolt attached to the cylindrical base for fastening the squeeze plate and the support pipe to the seat. The cradle base is composed of a vertical plate for attaching the gantry to a conveyor frame, and a horizontal plate to which a cylindrical guide that houses the cylindrical base and holds it up and down is attached, and is located above the cylindrical guide. The end face is provided with a semicircular cutout so as not to be buffered by the support pipe, the horizontal plate is provided with a through hole, the through hole is provided with a screw, and the screw has a height adjusting bolt. The belt cleaner holding device is characterized in that the height of the belt cleaner can be adjusted by raising and lowering the pedestal with the height adjustment bolt.

The effects of the first solving means are as follows. (1) The height of the belt cleaner can be adjusted only by rotating the height adjusting bolt, and the belt cleaner can be adjusted during operation without stopping the belt conveyor. That is, while observing the scraping condition, it is possible to set the optimum contact state between the tip and the return side belt surface. (2) Since the pedestal is mounted on the rotatable pedestal base, the pedestal slightly rotates even if the mounting accuracy of the support pipe attached to both sides of the return side belt and the pedestal base is poor By doing this, it is possible to release the restraint force due to the moment generated in the support pipe and the pedestal base. If the support pipe and the base of the pedestal are twisted, height adjustment work by the height adjustment bolt becomes difficult. (3) Since the cylindrical base and the cylindrical guide are formed in a cylindrical shape, the cylindrical guide can smoothly guide the cylindrical base when the cradle is raised and lowered with the height adjusting bolt. (4) Since the cylindrical guide of the cradle base is fixed to the vertical plate and the horizontal plate, the rigidity of the cradle base is increased with respect to the vertical force, horizontal force and thrust force that the belt cleaner receives from the return side belt. Can. (5) Since the belt cleaner holding device is compact and easy to operate, the belt cleaner can be mounted in the field safely and in a short time, and can be mounted in a narrow space.

FIG. 2 is a perspective view of a belt cleaner provided with belt cleaner holding devices on both sides. The perspective view which expanded the belt cleaner holding | maintenance apparatus. The longitudinal section with a front view of a belt cleaner holding device. The longitudinal fragmentary sectional view in the front view of the cradle. FIG. 5 is a plan view of the cradle, and is a cross-sectional view taken along line AA of FIG. FIG. 6 is a side view of the cradle, and is a view BB in FIG. 5. The longitudinal cross-sectional view in the front view of a cradle base. CC sectional drawing of FIG. The front view of a belt cleaner retention device, the vertical fragmentary sectional view in the state where the stand was raised.

An embodiment of the present invention will be described on the basis of claims 1 and 1 to 9.

As shown in claim 1, the first solution is that a belt cleaner 10 in which scrapers 20 are arranged on a gantry 40 arranged in the width direction of the return side belt 30 is arranged at both ends of the gantry 40. In the belt cleaner holding device 100 for holding the attached support pipe 50 and fixing it to the lower surface of the return side belt 30, the belt cleaner holding device 100 includes a cradle 110 and a cradle base 120. The base 110 includes a cylindrical base 111 obtained by cutting a pipe at right angles to the axial direction. A bottom plate 112 is provided on the lower end surface of the cylindrical base 111, and an upper end surface of the cylindrical base 111 is provided with the support pipe 50. Two receiving seats 111a for receiving the support pipe 50 having a semicircular shape larger than the outer diameter, and a collecting plate 1 for holding the support pipe 50 and pressing it against the receiving seat 111a 0, and a clamping bolt 113 attached to the cylindrical base 111 in order to clamp and fix the rubbing plate 130 and the support pipe 50 to the receiving seat 111a. A vertical plate 121 to be attached to the conveyor frame 60 and a horizontal plate 122 to which the cylindrical base portion 111 is housed and a cylindrical guide 123 that can be moved up and down are attached. A semicircular cutout 123a is provided so as not to buffer the support pipe 50, the horizontal plate 122 is provided with a through hole 122a, the through hole is provided with a screw 124, and the height of the screw 124 is adjusted. A bolt 125 is attached, and the height of the belt 110 is raised and lowered by the height adjustment bolt 125 so that the height of the belt cleaner 10 can be reduced. A belt cleaner holding device 100 is characterized in that to allow integer.

FIG. 1 shows a perspective view of a belt cleaner 10. FIG. 2 is an enlarged perspective view of the belt cleaner holding device 100. FIG. 3 is a front view of the belt cleaner holding device 100, and is a view in which a half on one side is longitudinally sectioned. The belt cleaner 10 has a plurality of scraping members 20 each having a tip 21 made of a wear resistant material attached to a free end 20a in a row on a rack 40 disposed in the width direction of the return side belt 30. A structure that scrapes off deposits on the surface of 30 is often used. Support pipes 50 are attached to both ends of the gantry 40. The support pipes 50 are held by a belt cleaner holding device 100, and the belt cleaner holding device 100 is attached to a conveyor frame 60 or the like.

The belt cleaner holding device 100 is composed of a pedestal 110 and a pedestal base 120. The pedestal 110 is inserted into a cylindrical guide 123 provided on the horizontal plate 122 of the pedestal base 120, and held up and down and rotatably. A through hole 122a is provided in the horizontal plate 122, a screw 124 is provided in the through hole 122a, and a height adjustment bolt 125 is rotatably screwed. The screw 124 may be formed directly in the through hole 122a, or the nut 124 may be formed by welding.

As shown in FIG. 3, the cylindrical guide 123 uses a pipe whose inner diameter is slightly larger than the outer diameter of the cylindrical base 111. The gap G between the cylindrical base 111 and the cylindrical guide 123 is desirably 1 to 5 mm. If it is smaller than 1 mm, a partial contact portion occurs between the cylindrical base 111 and the cylindrical guide 123 due to the restriction of manufacturing accuracy, and a large sliding resistance is generated. or. If it is 5 mm or more, the cylindrical base 111 is inclined to come into contact with the cylindrical guide 123 to cause a large sliding resistance. For example, when a 60A pipe according to JIS G3454 STPG sch40 is used as the cylindrical base 111, the outer diameter is 76.3 mm. When a pipe of JIS G3452 SGP 80A is used as the cylindrical guide 123, the inner diameter is 80.7 mm. The difference between the inner diameter and the outer diameter is 4.4 mm, and a clearance of 2.2 mm on one side can be secured. In order to prevent the support pipe 50 from interfering with the notch 123 a when the cylindrical base 111 is inclined, the size of the notch 123 a is preferably 2 to 5 mm larger than the receiving seat 111 a of the cylindrical base 111.

Since the cradle 110 is rotatably attached to the cradle base 120, when the belt cleaner 10 is installed on the lower portion of the return side belt 30, the perpendicularity between the cradle base 120 and the support pipe 50 cannot be secured. The slight rotation of the cradle 110 does not generate a binding force with the cradle base 120. In addition, when the height adjustment bolt 125 pushes up the bottom plate 112 of the cradle 110 to raise the cradle 110, the cradle 110 does not interfere with the cylindrical guide 123 of the cradle base 120, and the binding force is reduced. Since it does not act, it can be smoothly raised and lowered.

8 is a cross-sectional view taken along the line CC of FIG. Two semicircular notches 123 a larger than the receiving seat 111 a of the cylindrical base 111 are provided at two end surfaces of the cylindrical guide 123 in the axial direction of the support pipe 50. When adjusting the parallelism between the belt cleaner 10 and the return side belt 30, even if the angle of the support pipe 50 and the return side belt 30 in the width direction is shifted and swings, the support pipe 50 does not interfere with the notch 123a. It is made to be able to store it.

FIG. 4 is a front view of the cradle 110, and is a cross-sectional view of a half of one side. The cylindrical base 111 of the cradle 110 has a cylindrical shape obtained by cutting the pipe at right angles to the axial direction. A semicircular shape slightly larger than the outer shape 50 a of the support pipe 50 is cut into two axial ends of the cylindrical base 111 in the axial direction of the support pipe 50 to form a receiving seat 111 a of the support pipe 50. Two clamping bolts 113 are attached to the end face of the cylindrical base 111. A collecting plate 130 is inserted into the tightening bolt 113 through the through hole 130 a. A pressure plate 131 for restraining the rotation of the support pipe 50 is fixed to the suction plate 130. The support pipe 50 is fastened to the receiving seat 111 a by the presser plate 131 attached to the collecting plate 130 and the fastening nut 114 and fixed to the receiving stand 110. The holding plate 131 preferably has a circular arc equal to or slightly larger than the outer diameter 50 a of the support pipe 50. The better the adhesion between the presser plate 131 and the support pipe 50, the larger the frictional force between the support pipe 50 and the presser plate 131, and the rotational resistance against the rotational moment received from the return side belt 30 is improved. A bottom plate 112 is welded and fixed to one side of the cylindrical base 111. When the bottom plate 112 is pushed up by a height adjusting bolt 125, the cradle 110 is raised, and the free side terminal 20a or the tip 21 of the scraping body 20 is attached to the return side belt. 30 can be brought into precise contact.

FIG. 5 is a cross-sectional view taken along the line A-A of FIG. 6 is a view B-B of FIG. 5 and is a side view of the cradle 110. FIG. FIG. The bottom plate 112 and the cylindrical base 111 are provided with an opening 112 a so that dust does not accumulate on the bottom plate 112. As shown in FIG. 6, the clamping bolt 113 may be attached by welding by cutting out the side of the cylindrical base 111. This is because the area of the welded portion 113a is increased, and the attachment strength of the tightening bolt 113 is improved.

FIG. 7 is a front view of the pedestal base 120 and a longitudinal sectional view of one half thereof. The cradle base 120 includes a vertical plate 121 for attaching the belt cleaner holding device 100 to the conveyor frame 60 and the like, and a horizontal plate 122 for supporting the cradle 110 so as to be movable up and down. The vertical plate 121 is provided with a through hole 121 a, and is attached to the conveyor frame 60 or the like by a bolt 126. The horizontal plate 122 is provided with a through hole 122 a and a screw 124 is provided. The screw 124 may be formed directly in the through hole 122a, but the nut 124 may be formed by welding. A height adjustment bolt 125 is rotatably engaged with the screw 124, and the belt cleaner 10 is raised by pushing up the cradle 110 with the height adjustment bolt 125, so that the free side terminal 20 a of the scraper 20 and the tip are removed. 21 can be brought into contact with the return belt 30 precisely.

FIG. 9 is a view for explaining the positions of the lowermost point and the uppermost point when the pedestal 110 is lifted by the height adjustment bolt 125. As shown in FIG. The height adjustment bolt 125 is rotated and raised to raise the cradle 110 and the support pipe 50 held by the cradle 110. The rising stroke is 10-30 mm. If it is smaller than 10 mm, it can not follow the wear of the return side belt 30 or the deformation due to the trough ridge, and the scraping body 20 or the tip 21 can not be abutted precisely. If it is larger than 30 mm, the bending moment generated in the cylindrical base 111 due to the horizontal force received from the return side belt 30 becomes large, and the cylindrical base 111 and the cylindrical guide 123 are kneaded, making it difficult to smoothly raise and lower. A stopper such as a collar 127 may be attached to the height adjustment bolt 125 to limit the lift of the pedestal 110.

10: belt cleaner 20: scraper 21: tip 30: return side belt 40: mount 50: support pipe 50a: outer diameter 60 (of support pipe) conveyor belt 100: belt cleaner holding device 110: cradle 111: cylinder Base 111a: Receiving seat 112: Bottom plate 112a: Opening 113: Tightening bolt 113a: Welding portion 114: Tightening nut 120: Receiving base 121: Vertical plate 121a: Through hole 122: Horizontal plate 122a: Through hole 123: Cylindrical guide 123a : Notch 124: Screw (nut)
125: height adjustment bolt 126: bolt 130: collecting plate 130a: through hole 131: pressing plate G: gap (of cylindrical base and cylindrical guide)

Claims (1)

A belt cleaner in which scrapers are arranged on a gantry arranged in the width direction of the return side belt, and holding support pipes attached to both ends of the gantry to fix the belt cleaner to the lower surface of the return side belt. In the holding device, the holding device includes a cradle and a cradle base, and the cradle includes a cylindrical base obtained by cutting a pipe at right angles to the axial direction, and a bottom plate is provided on a lower end surface of the cylindrical base. , On the upper end surface of the cylindrical base, two receiving seats for receiving the semicircular supporting pipe larger than the outer diameter of the supporting pipe, a squeezing plate that holds the supporting pipe and presses against the receiving seat, In order to fasten and fix the kneading plate and the support pipe to the receiving seat, the fastening base is composed of a fastening bolt attached to the cylindrical base, and the receiving base is a hanging base for attaching the mount to the conveyor frame. It consists of a plate and a horizontal plate attached with a cylindrical guide that holds the cylindrical base and holds it up and down, and the upper end face of the cylindrical guide has a semicircular notch so as not to buffer the support pipe. Provided, a through hole is provided in the horizontal plate, a screw is provided in the through hole, a height adjustment bolt is attached to the screw, and the cradle is lifted and lowered by the height adjustment bolt, A belt cleaner holding device characterized in that height adjustment of the belt cleaner is made possible.