Belt cleaner

Abstract

To solve a problem that a return belt has a convex arc shape on an upper side due to a trough tendency and a central part wearing out first, but a shape varies greatly for each individual belt, and thereby when multiple chips are placed in a straight line across a width of the return belt, the chips do not contact a surface of the return belt accurately, resulting in a large amount of scraping remaining.SOLUTION: There is provided a belt cleaner in which upper and lower connecting holes are provided parallel to a belt on upper and lower sides of a square rod-shaped rubber elastic body equipped with an abrasion-resistant tip, and the rubber elastic body through which upper and lower connecting rods pass is arranged in a row in a groove of a stand, and a pressing bolt is provided on a rear plate of the groove to press and fix a periphery of the lower connecting rod, and a pressing pin is inserted through an opening provided at a bottom of the groove, to push up a bottom surface of the rubber elastic body, adjust a height of the rubber elastic body so as to abut against a belt, and then press the rubber elastic body and secure the same to the stand with the pressing bolt.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a belt cleaner for scraping off deposits adhering to the surface of the return side belt of a belt conveyor used for transporting raw materials.

Background Art

[0002] The surface state of the belt is not uniform in the width direction of the belt, and generally, the wear at the center is the largest. Also, partial depressions occur due to linear scraping marks, material dropping marks, or burning marks caused by high-temperature materials. Since the loading pressure of the conveyed material is large near the center of the belt, a large amount of wear occurs and innumerable fine defects are generated, and deposits tend to adhere firmly. In addition, the belt develops a trough shape because it forms a trough angle when transporting raw materials. Conventional belt cleaners mainly consist of rubber elastic plates or metal scraping plates with a width of about 100 to 500 mm arranged in a row in the width direction of the belt. Since the entire surface of the scraping plate does not uniformly contact the belt surface, scraping residues are generated. When trying to force the scraping plate to contact the return side belt to eliminate the scraping residues, the pressing force increases, which wears the return side belt and promotes the peeling of the endless part, damaging the belt. Therefore, the management of the pressing force of the belt cleaner is an important issue.

[0003] The requirements for a scraper-type belt cleaner are as follows. (1) When actually installing the belt cleaner, the scraping part can be precisely adjusted to contact the convex arc shape of the belt. (2) Against strong deposits on the belt and peeling of the endless part (connection part), the chip bends greatly in the running direction of the belt, instantly bypasses obstacles, avoids damage to the belt cleaner, and can return to a normal scraping state. (3) It can surely scrape off deposits over a long period. (4) The adjustment cycle and replacement cycle of the belt cleaner are long, and replacement is easy. However, a satisfactory belt cleaner has not been realized.

[0004] In the publicity of Japanese Patent Application Laid-Open No. 2015-036327, there is a belt cleaner in which a through-hole is provided in the width direction of the return side belt of the fixing portion of the chip stick (rubber elastic body), a string is passed through, and a plurality of rubber elastic bodies are integrated and fixed in a gantry groove. In this method, since the upper part of the rubber elastic body is not fixed, the rubber elastic body moves separately in the belt thrust direction and the width direction, resulting in scraping residues.

[0005] In the publicity of Japanese Patent Application Laid-Open No. 2019-104629, there is a belt cleaner in which a plurality of rectangular bar-shaped rubber elastic bodies are arranged in a row in a groove of a gantry, and a communication hole is provided in the width direction of the return side belt at the upper part of the rectangular bar-shaped rubber elastic body and a wire rod passes through. In this method, since a through-hole is provided on the fixed portion side of the rubber elastic body and it is not fixed with a wire rod, there is a problem that the fixed side opens in the belt width direction.

[0006] In the publicity of Japanese Patent Application Laid-Open No. 2016-216184, there is a belt cleaner characterized in that a plurality of rectangular bar-shaped rubber elastic bodies are arranged in a row in a groove of a gantry arranged in the width direction of the return side belt, and the height of the rectangular bar-shaped rubber elastic body is adjusted by a plurality of height adjustment bolts attached to the groove bottom. In this method, the pressing force of each height adjustment bolt cannot be accurately grasped, and if the pressing force of the belt cleaner is too large, there is a problem of shortening the life of the belt and wear-resistant consumables.

Prior Art Documents

Patent Documents

[0007]

Patent Document 01

Patent Document 02

Patent Document 03

Summary of the Invention

Problems to be Solved by the Invention

[0008] The present invention solves the following problems. (1) To make the height of the rod-shaped rubber elastic body, which is the scraping part of the belt cleaner, adjustable according to the shape of the belt when actually installed. (2) To enable the rubber elastic body to return to its normal scraping position even if it is greatly deflected by the protrusions of the return-side belt. (3) To extend the life of the belt and the wear-resistant chips by softly contacting the belt without pressing the wear-resistant chips against the belt with excessive force. (4) To be able to set the position by raising a plurality of rubber elastic bodies with push-up pins, temporarily fixing them in the grooves of the gantry, and then firmly tightening them with pressing bolts.

Means for Solving the Problems

[0009] As shown in claim 1, the first solution means is that upper connection holes and lower connection holes are provided in parallel with the belt on the upper and lower sides of a rectangular rod-shaped rubber elastic body provided with wear-resistant chips at its tip. Flexible upper connection rods and lower connection rods are respectively passed through the upper connection holes and the lower connection holes, and a plurality of the rubber elastic bodies are connected. In a belt cleaner in which the rubber elastic bodies are arranged in a row in the grooves of a gantry arranged in the width direction of the belt, a pressing bolt for pressing and fixing the lower connection rod is rotatably provided on the rear plate of the groove, and an opening is provided at the bottom of the groove of the groove. After adjusting the height of the rubber elastic body by pushing up the lower surface of the rubber elastic body from the opening, the belt cleaner is characterized in that the rubber elastic body is fixed by the pressing bolt.

[0010] As shown in claim 2, the second solution means is that when the rubber elastic body is pushed up with the push-up pin to bring the wear-resistant chip into contact with the belt for height adjustment and then the pushing force of the push-up pin is released. The belt cleaner is characterized by being provided with a stopper that generates a frictional force for fixing the rubber elastic body in the groove so that the rubber elastic body does not slip down from the height adjustment position.

Effects of the Invention

[0011] The effects of the first solution are as follows. (1) By inserting a push-up pin into the opening provided at the bottom of the groove of the gantry, the end face of the rubber elastic body can be pushed up, and the wear-resistant chip provided at the tip of the rubber elastic body can be accurately abutted against the return belt. (2) By making the opening a long hole along the longitudinal direction of the gantry, the height of any rubber elastic body can be adjusted, and there will be no scraping residue. (3) The height adjustment bolt becomes unnecessary, and the parts of the belt cleaner can be reduced. (4) Since the push-up pin is manually pushed up, the magnitude of the push-up force can be felt. (5) When the pressing force of the push-up pin is released, the push-up pin is pushed back by the elastic force of the rubber elastic body and the return belt, so the pressing force becomes zero and can be set to a no-load state.

[0012] The effects of the second solution are as follows. After the height of the rubber elastic body is adjusted by pushing it up with a push-up pin, the rubber elastic body can be fixed in the groove with a stopper that generates frictional force so that the rubber elastic body does not slip down due to its own weight or the restoring force of the push-up pin.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0014] Embodiments of the present invention will be described based on Claim 1, Claim 2, and FIGS. 1 to 7.

[0015] As shown in Claim 1, the first solution means is that upper connection holes 22a and lower connection holes 23a are provided parallel to the belt 11 on the upper and lower sides of a square bar-shaped rubber elastic body 20 having a wear-resistant tip 21 at the tip. Flexible upper connection rods 22 and lower connection rods 23 are respectively passed through the upper connection holes 22a and the lower connection holes 23a, and a plurality of the rubber elastic bodies 20 are connected. In a belt cleaner 10 in which the rubber elastic bodies 20 are arranged in a groove 40a of a gantry 40 arranged in the width direction of the belt 11, a pressing bolt 44 for pressing and fixing the lower connection rod 23 is rotatably provided on a rear plate 41 of the groove 40a, and an opening 43a is provided on a bottom plate 43 of the groove 40a. After adjusting the height of the rubber elastic body 20 by pushing up the lower surface 20a of the rubber elastic body 20 from the opening 43a, the rubber elastic body 20 is fixed by the pressing bolt 44. The belt cleaner 10 is characterized by this.

[0016] FIG. 1 is a perspective view of a partially cross-sectioned belt cleaner 10 in which the height of a square bar-shaped rubber elastic body 20 can be adjusted with a push-up pin 30. The gantry 40 is composed of a front plate 42, a rear plate 41, and a bottom plate 43. A plurality of rubber elastic bodies 20 are inserted and arranged in a row, and the upper and lower sides of the rubber elastic body 20 are respectively connected by an upper connection rod 22 and a lower connection rod 23, and a scraping plate integrated in the belt width direction can be formed. The rear plate 41 is provided with a pressing bolt 44 for pressing and fixing the rubber elastic body 20 against the front plate 42 in the width direction of the belt 11. An opening 43b for inserting a push-up pin 30 for pushing up the rubber elastic body 20 and adjusting the height is provided on the bottom plate 43.

[0017] As shown in Fig. 1, the cross-section of the rubber elastic body 20 is square and rod-shaped. It is desirable that the width W and thickness B of the rubber elastic body 20 are substantially the same. When the width W and thickness B of the square rod-shaped rubber elastic body 20 are the same, it is preferable that W = B = 10 to 30 mm. If it is less than 10 mm, the rigidity is weak and the scraping ability is small. If it is more than 30 mm, the rigidity is too large, the deflection is small, and it will not flexibly follow the small unevenness of the return belt 11. The length L of the rubber elastic body 20 is preferably 40 to 300 mm. If it is shorter than 40 mm, the deflection is too small and the followability to the return belt 11 decreases. If it is longer than 300 mm, the amount of deflection is too large and the scraping force decreases.

[0018] Since the rubber elastic body 20 scrapes off the adherents in a state of being deflected in the running direction of the belt 11, when a protrusion such as a rolled joint collides with the wear-resistant chip 21, the rubber elastic body 20 can be greatly deflected and flexibly avoided. Therefore, rubber is used for the rubber elastic body 20. For the rubber, for example, natural rubber, synthetic natural rubber, styrene, butadiene rubber, chloroprene rubber, acrylic rubber, nitrile rubber, urethane rubber, fluorine rubber, etc. can be used.

[0019] A wear-resistant chip 21 is provided on the upper part of the rubber elastic body 20. The wear-resistant chip 21 is fixed by bolts 25. Upper connection holes 22a are provided in the width direction of the belt 11 between the bolts 25, and a flexible upper connection rod 22 passes through, and both ends of the upper connection rod 22 are fixed by fasteners 24. Since the rubber elastic body 20 is deflected by receiving forces in the width direction, running direction, and height direction of the high-speed running belt 11, displacement occurs between adjacent rubber elastic bodies 20 to prevent the tips of the rubber elastic bodies 20 from opening.

[0020] Lower connection holes 23a are provided in the width direction of the belt 11 at the lower part of the rubber elastic body 20, and a flexible lower connection rod 23 passes through, and both ends of the lower connection rod 23 are fixed by fasteners 24. The lower connection rod 23 prevents the gap between adjacent rubber elastic bodies 20 from opening due to the thrust force of the belt 11.

[0021] The diameters of the upper connection holes 22a and the lower connection holes 23a are 1.0 to 6.0 mm. The diameters of the upper connection rod 22 and the lower connection rod 23 are 1.5 to 4.5 mm. As the upper connection rod 22 and the lower connection rod 23, resin rods such as steel wires, stainless steel wires, steel wires, stainless steel wires, urethane, fluorine, and rubber can be used. When pushed up by the push-up pin 30, it has flexibility to bend softly in an arc shape, and it is sufficient if it has the strength to push up a plurality of rubber elastic bodies 20.

[0022] Both ends of the front plate 42, the rear plate 41, and the bottom plate 43 are welded and fixed by flanges 45. An indicating shaft 46 is welded and fixed to the flange 45, and the support shaft 46 is inserted into a square sleeve 47 provided with a rotation prevention screw 48 for preventing rotation. The square sleeve 47 is placed on a bearing base 50. The bearing base 50 is provided with a height adjustment screw 51 for adjusting the height of the support shaft 46 to adjust the contact property between the rubber elastic body 20 and the belt 11. The bearing base 50 is attached to the conveyor frame 60.

[0023] Figure 2 shows that the bottom plate 43 is provided with an elongated opening 43b. By making the shape elongated, the push-up pin 30 can be set on the lower surface 20a of the rubber elastic body 20 at an arbitrary position to adjust the height of the rubber elastic body 20.

[0024] Figure 3 shows that the bottom plate 43 is provided with round holes 43b at appropriate intervals. When one rubber elastic body 20 is pushed up by the push-up pin 30, due to the flexibility of the connecting rods 22 and 23, a plurality of adjacent rubber elastic bodies 20 can also be raised simultaneously to form a smooth arc.

[0025] Figure 4 shows that a large number of openings 43b are provided near the central portion of the bottom plate 43. Since the central portion of the belt 11 wears significantly, finely adjusting the height of the tip of the wear-resistant chip 21 makes it easier to approximate the worn shape of the belt 11.

[0026] Based on FIG. 5, the height adjustment procedure of the rubber elastic body 20 will be described. (1) FIG. 5(a) shows a state where the rubber elastic body 20 is set on the lower surface of the belt 11, before the height adjustment of the worn portion. Since the wear-resistant tip 21 is not in contact with the belt 11, a gap δ is generated. Loosen the tightening bolt 44 slightly before pushing up the rubber elastic body 20. The tightening bolt 44 should be tightened to such an extent that the rubber elastic body 20 can be pushed up by the pushing pin 30 and will not slip off. (2) FIG. 5(b) shows the state during height adjustment, indicating that the lower surface 20a of the rubber elastic body 20 is pushed up by the pushing pin 30 to bring the wear-resistant tip 21 into contact with the belt 11. (3) FIG. 5(c) shows a state where the height adjustment is completed with the wear-resistant tip 21 in contact with the belt 11, and the pressing bolt 44 is fully tightened so that the rubber elastic body 20 will not slip off. The rubber elastic body 20 in contact with the tip of the pressing bolt 44 is partially recessed 20b, which can completely prevent the rubber elastic body 20 from slipping off. (4) FIG. 5(d) shows the running state of the belt 11. The wear-resistant tip 21 can scrape off the deposits while being deflected in the advancing direction under the thrust from the belt 11. If the diameter of the lower connecting hole 23a is enlarged, when the rubber elastic body 20 is pressed by the pressing bolt 44, the lower connecting hole 23a will be distorted into an ellipse and the lower connecting rod 23 will be pressed against the front plate 42, and the rubber elastic body 20 will be firmly fixed in the groove 40a by the frictional force.

[0027] As shown in claim 2, the second solution is that after the height of the rubber elastic body 20 is adjusted by pushing up the rubber elastic body 20 with the pushing pin 30 to bring the wear-resistant tip 21 into contact with the belt 11, when the pushing force of the pushing pin 30 is released. The belt cleaner 10 is characterized in that stoppers 26 and 27 are provided to generate a frictional force for fixing the rubber elastic body 20 in the groove 40a so that the rubber elastic body 20 will not slip off from the height adjustment position.

[0028] Figure 6 shows an exemplary embodiment of the stopper 26. First, as shown in Fig. 6(a), the stopper 26 is inserted into the tip of the pressing bolt 44. Next, as shown in Fig. 6(b), the stopper 26 is compressed between the pressing bolt 44 and the rubber elastic body 20, generating a large frictional force without damaging the rubber elastic body 20, so that the rubber elastic body 20 can be firmly fixed at an arbitrary height. The stopper 26 is suitable for NBR, urethane rubber, silicone rubber, synthetic rubber, etc.

[0029] Figure 7 shows an exemplary embodiment of the stopper 27. As shown in Fig. 7(a), a stopper 27 made of an elastic body with a width larger than the width of the groove bottom 40a is laid on the groove bottom 40a. As shown in Fig. 7(b), the stopper 27 is sandwiched between the front plate 42 and the rear plate 41 to generate a frictional force F, so that the rubber elastic body 20 can remain in that position while being pushed up. As shown in Fig. 7(c), even if the pushing pin 30 is released, the rubber elastic body 20 can be retained at the set position by the frictional force. The stopper 27 is suitable for rubber plates such as NBR, urethane rubber, silicone rubber, synthetic rubber, etc.

Description of Reference Numerals

[0030] 10: Belt cleaner 11: Belt 20: Rubber elastic body 20a: Lower surface 21: Wear-resistant chip 22: Upper connecting rod 22a: Upper connecting hole 23: Lower connecting rod 23a: Lower connecting hole 24: Fastening fitting 25: Bolt 26: Stopper 27: Stopper 30: Pushing pin 31: Handle 40: Mounting base 40a: Groove 41: Rear plate 42: Front plate 43: Bottom plate 43a: Opening 44: Pressing bolt 45: Flange 46: Support shaft 47: Angular sleeve 48: Locking screw 50: Bearing pedestal 51: Height adjustment screw 60: Conveyor frame

Claims

1. Upper and lower connecting holes are provided parallel to the belt on the upper and lower sides of a square rod-shaped rubber elastic body having a wear-resistant tip at the tip. Flexible upper and lower connecting rods are passed through the upper and lower connecting holes respectively, and a plurality of the rubber elastic bodies are connected. In a belt cleaner in which the rubber elastic bodies are arranged in a row in a groove of a gantry arranged in the width direction of the belt, a pressing bolt for pressing and fixing the lower connecting rod is rotatably provided on the rear plate of the groove, and an opening is provided at the bottom of the groove of the groove. After the height of the rubber elastic body is adjusted by pushing up the lower surface of the rubber elastic body from the opening, the belt cleaner is characterized in that the rubber elastic body is fixed by the pressing bolt.

2. After the rubber elastic body is pushed up by the pushing pin and the wear-resistant tip is brought into contact with the belt for height adjustment, when the pushing force of the pushing pin is released. The belt cleaner according to claim 1, further comprising a stopper for generating a frictional force for fixing the rubber elastic body to the groove so that the rubber elastic body does not slip down from the height adjustment position.

Images