JP2010285227A - Belt tension adjuster - Google Patents

Abstract

A belt tension adjusting device capable of easily attaching and detaching a belt of a belt conveyor is provided.
A belt tension adjusting device 1 includes a drive roller 3, a pair of snap rollers 2a and 2b, and a pair of arc-shaped arms 4a and 4b having the pair of snap rollers 2a and 2b at one end. , Support gears 5a and 5b disposed on the other end of the arms 4a and 4b, a gear box disposed on one of the support gears 5a and 5b, and a lever 7 coupled to the gear box, The belt 12 is stretched between a pair of snap rollers 2a, 2b and a drive roller 3, and the arms 4a, 4b are connected to the pair of support gears 5a, The belt 5 is opened and closed by moving simultaneously, and the tension of the belt 12 is adjusted by adjusting the force with which the snap rollers 2a and 2b urge the belt 12 toward the drive roller 3 by opening and closing the arms 4a and 4b. Adjust to.
[Selection] Figure 2

Description

  The present invention relates to a belt tension adjusting device used for attaching / detaching a belt of a belt conveyor.

  In general, a belt conveyor is driven by bringing an endless belt, which is tensioned by a tension roller, into contact with a driving pulley, and therefore, when replacing or cleaning the belt, at least the support mechanism of the driving unit and the related connecting unit are disassembled. You need to remove the belt above. In particular, in food and pharmaceutical transport lines, it is necessary to remove fine dust and dust that adhere to and accumulate on the front surface, back surface, and rollers of the belt so that they do not enter the product or package and keep it clean. Therefore, it is necessary to remove the belt from the conveyor, clean it, and wash it at least once every day at the end of the work, even if no visible dust or dust adheres. is there. When disassembling the conveyor, the return roller can be easily attached and detached by making the leg of the conveyor cantilever and by dropping the return roller that supports the belt on the lower surface.

  However, in order to attach and detach the belt, it is necessary to disassemble the other pulleys and rollers that are in contact with the belt, and then remove the belt. Therefore, a great deal of labor and time are forced to attach and detach the belt for cleaning the conveyor.

  In order to reduce the belt attaching / detaching operation of the conveyor, for example, a small belt conveyor using a driving roller unit that can be easily attached to and detached from a conveyor frame by a catch clip is known (see Patent Document 1). In a belt conveyor with a drive unit consisting of a drive pulley, a draw pulley with take-up and a loose throttle pulley, a catch clip is fixed to the left and right side plates of the drive unit, and the belt is loosened and locked to the shaft end of the throttle pulley. A conveyor is known (see Patent Document 2). Without using bolts and nuts, the notch (including long holes, window holes, drop-in, etc.) provided on the side plate of the drive unit is inserted with the throttle pulley shaft and the loose pulley shaft, respectively, and protrudes from the notch. This is a belt conveyor that makes it easy to attach and detach the throttle pulley and the loose throttle pulley by locking the loose throttle pulley shaft end with a catch clip (Patchon lock) fixed to the side plate.

JP 2001-80717 A Japanese Patent Laying-Open No. 2005-212918 (paragraph 0005, paragraph 0006)

  However, in the technique of Patent Document 1, although the belt itself can be easily attached and detached by attaching and detaching the drive roller unit to the conveyor frame, the entire roller unit including the drive roller, the drive motor unit, the leaf spring, and the storage frame is mounted. In order to separate the roller unit from the conveyor frame, the entire roller unit needs to be lightweight and compact that can be attached to and detached from the conveyor frame with a catch clip, and this technique has a problem that its application is limited to a small belt conveyor. .

  Further, in the technique of Patent Document 2, the object to be locked by the catch clip (Patchon lock) is not the entire drive roller unit but the throttle pulley or the loose throttle pulley, so that it can be applied to a large machine. However, since the range in which the belt can be loosened when attaching and detaching the belt is limited to the operating range of the catch clip, there is a possibility that sufficient belt looseness for attachment and detachment cannot be obtained. Further, since the throttle pulley or the loose throttle pulley is locked by a catch clip (Patchon lock), the tension of the catch clip is always applied to the belt during operation, and the belt may have a short life.

  The present invention has been made to cope with such a problem, and an object of the present invention is to provide a belt tension adjusting device capable of easily attaching and detaching a belt of a belt conveyor without using a tool.

  The belt tension adjusting device of the present invention is a belt tension adjusting device that is mounted on a belt conveyor and adjusts the tension of the belt of the belt conveyor, and includes a pair of driving rollers and a pair of biasing the belts toward the driving rollers. A snap roller, a pair of arc-shaped arms having the pair of snap rollers at one end, a pair of support gears disposed at the other end of the arm and rotatably supporting the arms; A gear box disposed on one of the support gears, and a lever coupled to the gear box, the belt being stretched between the pair of snap rollers and the drive roller, The arc-shaped arm opens and closes when the pair of supporting gears move simultaneously through the gear box in accordance with the operation of the lever. By opening and closing, the pair of snap rollers by adjusting the force for urging the said driving roller to the belt, and adjusting the tension of the belt.

  The belt tension adjusting device includes a cam lever for fixing the arm at a predetermined position. The operating angle of the lever is 30 ° or less.

  In addition, a V-bar is welded to the back surface of the belt, and a V-groove is provided in the driving roller.

  The belt tension adjusting device of the present invention is provided at a driving roller, a pair of snap rollers, a pair of arc-shaped arms having the pair of snap rollers at one end, and the other end of the arm. A pair of support gears, a gear box disposed on one of the support gears, and a lever coupled to the gear box, and the belt is stretched between the pair of snap rollers and the drive roller. The arm opens and closes when a pair of support gears move simultaneously through the gear box in accordance with the operation of the lever, and the snap roller urges the belt toward the driving roller by opening and closing the arm. Since the belt tension is adjusted by adjusting the belt, the belt can be removed from the restraint of the snap roller and the drive roller with one-touch operation without disassembling the attached equipment including the drive roller. Can be released, it is possible to easily attach and detach the belt from the belt conveyor.

  Further, since the belt tension adjusting device includes a cam lever that fixes the arm at a predetermined position, the arm position does not fluctuate when the belt is driven by fixing the arm with the cam lever. Further, since the operating angle of the lever is 30 ° or less, the lever can be easily operated.

  In addition, since a V-beam is welded to the back surface of the belt and a V-groove is provided in the drive roller, it can be used as a guide for the mounting position when the belt is mounted, and the belt meanders after the belt is mounted. The effect which suppresses can be given.

1 is an overall schematic diagram of a belt conveyor provided with a belt tension adjusting device of the present invention. It is a front view which shows the belt tension adjusting apparatus of this invention. It is a side view which shows the belt tension adjusting apparatus of this invention. It is explanatory drawing which shows the operating state of the belt tension adjusting apparatus of this invention.

  The belt tension adjusting device of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic view of a belt conveyor provided with a belt tension adjusting device of the present invention. As shown in FIG. 1, a belt tension adjusting device 1 according to the present invention is disposed in the center of a belt conveyor 11, and a belt 12 includes a head pulley 11a, one snap roller 2b, a drive roller 3, and the other snap roller 2a. And the tail pulley 11b. These snap rollers 2 a and 2 b are held at predetermined positions by the belt tension adjusting device 1, apply a predetermined tension to the belt 12, and press the belt 12 against the driving roller 3. The belt 12 pressed against the driving roller 3 travels by driving the driving roller 3.

  2 is a front view showing the belt tension adjusting device of the present invention, and FIG. 3 is a side view showing the belt tension adjusting device of the present invention. As shown in FIG. 2 and FIG. 3, the belt tension adjusting device 1 of the present invention includes a drive roller 3, a pair of snap rollers 2a and 2b, and a pair having the pair of snap rollers 2a and 2b at one end. Arc-shaped arms 4a and 4b, support gears 5a and 5b which are disposed at the other end of the pair of arc-shaped arms 4a and 4b and rotatably support the arms 4a and 4b, and the support gears A gear box 6 disposed on one of 5a and 5b, a lever 7 connected to the gear box 6 for adjusting the operating angle (position) of the snap rollers 2a and 2b with respect to the support gears 5a and 5b, and an arm 4a. The cam lever 8 is fixed at a predetermined position.

  By the one-touch operation of moving the lever 7, the support gear 5a directly connected to the lever 7 through the gear box 6 moves at a predetermined operating angle, and the support gear 5b simultaneously moves at the same operating angle in the opposite direction to the movement of the support gear 5a. The two arc-shaped arms 4a and 4b can be opened and closed to adjust the positions of the snap rollers 2a and 2b. The belt tension adjusting device 1 adjusts the force of pressing (urging) the belt 12 toward the driving roller 3 through the two snap rollers 2a and 2b by operating the lever 7, whereby the tension of the belt 12 is adjusted. Can be adjusted.

  As shown in FIG. 2, a chain 10 is stretched between the drive roller 3 and the drive motor pulley 9. The drive roller 3 is rotated by a chain 10 that is driven by the rotation of the drive motor pulley 9 to drive the belt 12 that is biased by the snap rollers 2a and 2b. The two snap pulleys 2a, 2b and the driving roller 3 are cantilevered with the driving side on which the chain 10 is engaged as a fulcrum, and the belt 12 is loosened by operating the lever 7 to remove the belt 12 to the non-driving side. Can do.

FIG. 4 is an explanatory view showing the operating state of the belt tension adjusting device of the present invention, and is a view taken along the line AB in FIG. As shown in FIG. 4, in the belt tension adjusting device 1 of the present invention, the force for urging the belt to the driving roller 3 is adjusted by the positions of the snap rollers 2a and 2b, and the positions of the snap rollers 2a and 2b are adjusted by the lever 7. Regulated by the operation of. The operating angle of the lever 7 is an angle corresponding to the operating angle of the snap rollers 2a, 2b with respect to the support gears 5a, 5b, and the maximum operating angle is 30 °. When the operating angle is 0 °, the lever 7 is in the position of the lever 7 _l , and the belt cannot be tensioned at the positions of the snap rollers 2 a _l and 2 b _l corresponding to this position. The force to press is zero. When the operating angle is 30 °, the lever 7 is at the position of the lever 7 _h , and the positions of the centers of the snap rollers 2 a _h and 2 b _h corresponding to this position are directly above the centers of the support gears 5 a and 5 b. At this time, the force that presses the belt against the driving roller 3 is maximized. Usually, the belt conveyor 11 can be operated by applying a predetermined tension to the belt under an operating angle of 30 ° or less.

  A procedure for taking out the belt 12 from the belt conveyor 11 using the belt tension adjusting device of the present invention will be described with reference to FIGS. After stopping the belt conveyor 11 and confirming that the belt 12 has stopped running, the lever 7 is lowered to the lower limit of the operating angle of 0 °, and the belt 12 pressed against the driving roller 3 via the snap rollers 2a and 2b is moved. The drive roller 3 and the snap rollers 2a and 2b are released from restraint. The belt 12 released from the restraint of the driving roller 3 and the snap rollers 2a and 2b is taken out from the belt conveyor 11. At this time, the belt 12 can be released from the restraint of the driving roller 3 and the snap rollers 2a and 2b by one-touch operation with the lever 7 while the belt driving roller 3 is fixed, and the belt 12 is taken out from the belt conveyor 11. Can do. For this reason, compared with the conventional method which needs to decompose | disassemble the auxiliary equipment which slides the belt 12 to the drive roller 3, work becomes remarkably easy.

  A procedure for attaching the belt 12 to the belt conveyor 11 using the belt tension adjusting device 1 of the present invention will be described. With the lever 7 lowered to the lower limit of the operating angle of 0 °, the belt 12 is passed over the belt conveyor 11, and then the lever 7 is lifted upward, and the belt 12 is passed through the snap rollers 2a and 2b. Is pressed against the driving roller 3 to slide on the driving roller 3. Next, the belt conveyor 11 is started, and the tension is adjusted by operating the lever 7 so that the belt 12 is in a predetermined traveling state. At this time, the driving roller 3 remains fixed in a state before the belt 12 is taken out. For this reason, compared with the conventional method which needs to assemble the accessory for sliding the belt 12 to the drive roller 3, work becomes remarkably easy.

  When the tension stroke of the belt is longer than the movable range of the snap roller, the ratio of the belt loosening is small with respect to the total length of the belt. It is preferable to use together. By using this in combination, the belt can be easily attached / detached even when the rate of loosening of the belt is small relative to the total length of the belt.

  When the belt is mounted, depending on the mounting position, the belt may meander, and in order to provide a meandering suppression effect, and as a guide for the belt mounting position, a V-bar is welded to the back of the belt, and the drive roller In addition, it is preferable to make V-grooves in the head pulley and the slot plate portion.

  The belt tension adjusting device of the present invention can release the belt from the restraint of the snap roller and the driving roller by one-touch operation, and can be easily detached from the belt conveyor without disassembling the attached equipment including the driving roller. be able to. For this reason, it can be suitably used as a belt tension adjusting device for various large and small belt conveyors used in the industry.

DESCRIPTION OF SYMBOLS 1 Belt tension adjusting device 2a, 2b Snap roller 3 Drive roller 4a, 4b Arm 5a, 5b Support gear 6 Gear box 7 Lever 8 Cam lever 9 Drive motor 10 Chain 11 Belt conveyor 12 Belt

Claims (4)

A belt tension adjusting device that is mounted on a belt conveyor and adjusts the tension of the belt of the belt conveyor,
The belt tension adjusting device includes: a driving roller; a pair of snap rollers that urge the belt toward the driving roller; a pair of arc-shaped arms having the pair of snap rollers at one end; A pair of support gears disposed at the other end of the arm and rotatably supporting the arm; a gear box disposed on one of the support gears; and a lever coupled to the gear box. And
The belt is stretched between the pair of snap rollers and the driving roller,
The pair of arc-shaped arms are opened and closed by simultaneously moving the pair of support gears through the gear box in accordance with the operation of the lever.
Belt tension is adjusted by adjusting the force by which the pair of snap rollers urge the belt toward the drive roller by opening and closing the arm in accordance with the operation of the lever. Adjustment device.   The belt tension adjusting device according to claim 1, wherein the belt tension adjusting device comprises a cam lever for fixing the arm at a predetermined position.   The belt tension adjusting device according to claim 1 or 2, wherein an operating angle of the lever is 30 ° or less.   4. The belt tension adjusting device according to claim 1, wherein a V rail is welded to a back surface of the belt, and a V groove is provided in the driving roller.

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