JP2006056708A - Meandering prevention device of belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device capable of securely preventing a belt conveyor from meandering while reducing cost by abolishing crowning for adjusting belt tension in a cephalocaudal pulley and a drive pulley without installing V-cleats on the rear surface of a belt. <P>SOLUTION: A drive unit is installed at the intermediate part of a conveyor frame 1, and at least two sets of brackets are installed, oppositely to each other, at the lower part of a frame between the drive unit and the cephalocaudal pulley or an end pulley. A cantilever type return roller 15 formed of truncated conical rollers increased in diameter on the lateral end edge side of the belt 6 and allowed to face each other through a specified distance on the small diameter side is installed on each bracket to support the outer surface of a return side belt 6a. When the return side belt 6a is meandered and, for example, moved to the right side of the frame, the end part of the belt is moved to the large diameter side of the right side truncated conical roller and the tension of the right side part of the belt is partially extremely increased, and a force to press back the entire part of the belt to the right side where a weak tension occurs. As a result, the meadering of the belt can be prevented from occurring. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an apparatus for preventing meandering of a conveyor belt without sticking a vertical beam for preventing meandering on the back surface of a belt or performing V groove processing on a pulley.

In the case of a conveyor using a flat belt, dimensional errors and attachment errors of conveyor assembly parts, belt tension imbalance, etc. cannot be absorbed by deformation of the belt itself, and meandering occurs during running. In order to eliminate this meandering, a vertical beam (hereinafter referred to as a V beam) is attached to the entire length in the longitudinal direction of the back surface of the belt, and the head and tail pulley and the drive pulley are grooved to guide the V beam. If the conveyor is operated for a long time with the belt with the V rail, the V rail is worn out or peeled off. Therefore, the expensive belt with the V rail and the pulley with the V groove must be periodically replaced. In addition, because of the shape of the belt with V crossing, if the bending radius is reduced in the head-and-tail pulley, the bending of the flat crossing cannot follow the bending of the flat belt part, leading to lifting of the center part and damage to the V crossing part. There is a drawback that the bending radius of the belt with a cross must be increased, and it is not suitable for transporting small items.
The V-beam and pulley V-groove machining is disadvantageous in terms of high cost, so there may be no V-beam. When there is no V crosspiece, a method of taking a meander by crowning the head-and-tail pulley and the drive pulley is generally used. In addition to the unbalance, the meandering occurred due to a single load of transported goods, twisting and bending of the conveyor frame, and the like.

  For this reason, a control roller having a belt meandering control function is provided as a part of the belt driving device, and a trapezoidal cone (conical cone) is detected coaxially with the control roller supported so as to be rotatable relative to the shaft member. The ring is fixed to the shaft member, and when the return belt snakes and the belt end is hooked on the detection ring, the detection ring rotates according to the degree and the string member fixed to the frame side becomes the detection ring. In addition to preventing meandering by moving the movable end of the control roller shaft member by changing the angle with the control roller shaft member, the detection ring and the control roller only prevent foreign matter from getting caught. The thing which opened the gap of this is proposed (for example, patent document 1). Further, as a part of the belt driving device, a control roller supported so as to be relatively rotatable with respect to a shaft member having a belt meandering control function, and a trapezoidal cone-shaped detection ring coaxially integrated with the control roller are fixed to the shaft member. When the return belt meanders and the belt end is hooked on the detection ring, the detection ring rotates according to the degree, and the string member fixed on the frame side is wound around the detection ring, whereby the control roller shaft member Is moved to change the angle of the control roller shaft member with the movable frame to prevent meandering. There is also known one in which three rollers, not one, are interlocked to strongly prevent meandering (for example, Patent Document 2).

JP-A-11-208842 (page 4, left column, lines 6 to 37, right column, lines 32 to 45, FIGS. 1 and 2). JP 2000-128328 A (page 5, left column, line 43 to right column, line 14, FIG. 1).

  As in Patent Documents 1 and 2 described above, a trapezoidal cone-shaped detection ring is arranged, belt meandering is detected by the displacement of the ring, and the angle between the shaft member and the frame is changed to prevent meandering. As a result, the cost is high, and malfunctions are likely to occur during detection. The present invention provides an apparatus capable of reliably preventing meandering of a belt conveyor without providing a V-beam on the back surface of the belt and eliminating the crown processing for adjusting belt tension in the head-and-tail pulley and the driving pulley while reducing the cost. For the purpose.

In order to achieve the above object, claim 1 of the present invention provides at least two sets of brackets at opposite positions on the lower or side of the conveyor frame between the drive unit and the head-and-tail pulley, and each bracket has a belt. A return roller consisting of a frustoconical roller with a large diameter at the edge in the width direction and a small diameter side facing each other at a predetermined interval was attached, and the return belt was pushed up and supported. The present invention relates to a meandering prevention device for a belt conveyor.
According to the second aspect of the present invention, at least two sets of brackets are provided between the drive unit and the head-and-tail pulley at opposite positions of the lower part or the side part of the conveyor frame, and each of the brackets has a large diameter on the side edge in the width direction and a small diameter. The frustoconical rollers arranged with the sides facing each other at a predetermined interval, the same diameter as the small-diameter side of the frustoconical roller, and coaxially arranged between the left and right conical rollers A double-sided return roller formed of an equal-diameter roller is attached, and the return belt is pushed up and supported or pushed down.
According to a third aspect of the present invention, in the double-ended return roller, the narrow shaft portion formed at both ends of the equal diameter roller is inserted into the shaft hole of the frustoconical roller, and the end of the small shaft portion is It is characterized by being inserted into a bearing hole opened in the bracket.

  According to a fourth aspect of the present invention, the drive unit is attached to an intermediate portion of the conveyor frame, and includes an elastic member that urges the drive pulley in the drive unit upward, and a pair of receiving rollers provided at a lower portion of the frame that contacts the drive pulley. And a frictional drive with a belt interposed between the drive pulley and the pair of receiving rollers. According to a fifth aspect of the present invention, the drive unit is configured as a normal wrapping type drive pulley that is attached to an intermediate portion of the conveyor frame and includes a drive pulley and a pair of squeezing rollers. According to a sixth aspect of the present invention, the drive unit is provided at the rear portion of the frame, and the cantilevered or double-supported return roller is provided at the middle portion of the frame to push up and support the lower surface of the return side belt, or push down the upper surface. It is characterized by doing so.

The present invention does not require crown processing, V-groove processing, or the like on the pulley, thereby reducing the cost of the pulley. In addition, since the groove is not processed on the pulley, a thin-walled tube can be used, and the weight of the conveyor can be reduced. Further, the belt tension adjusting member is not required, and since the belt does not have a V-shaped bar, the diameter of the head-and-tail pulley can be reduced, and a knife edge can also be employed, so that small articles can be conveyed.
Since it has a simple structure in which brackets are provided at the bottom and sides of the frame and a return roller forming a frustoconical roller is attached to the bracket, retrofitting to an existing conveyor is easy.

  The meander-preventing roller according to the present invention includes at least two sets of truncated corn rollers arranged in contact with the belt surface or the back surface at the return side of the head-to-tail pulley of the belt conveyor or at the left and right ends of the belt near the drive unit Consists of. The truncated conical roller may be attached to both ends by a single shaft connecting the left and right frames, or may be cantilevered separately from the left and right frames. The truncated conical return roller for preventing meandering is limited to bringing the small diameter side of the truncated cone into contact with the surface side of the return belt when mounted on the left and right brackets under the frame near the head and tail pulley. Alternatively, the same effect can be obtained by bringing the frustoconical roller into contact with the back side of the return belt. As will be described later, the drive unit is a flick touch type (FIGS. 1-8, registered trademark of Sanki Kogyo Co., Ltd.), a normal hanging center drive type (FIGS. 9-11), and a drive type at the head and tail. (FIGS. 12 to 15) are applicable.

FIG. 1 is a front view of a first embodiment of a meandering prevention device for a belt conveyor of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.
Attach the flick touch drive unit 10 to the middle part of the conveyor frame 1, and at least two sets (four in total) of brackets at the opposite positions in the lower part of the frame between the drive unit 10 and the head / tail pulleys or end pulleys 4 and 5 13 and 13 are attached to each bracket, and a cantilevered return roller 15 having a frustoconical roller with a large diameter at the edge in the width direction of the belt 6 and a small diameter facing each other with a predetermined interval is attached to each bracket. The outer surface of the side belt (return belt) 6a is pressed and supported from below. When the return side belt 6a meanders and moves to the right side of the frame, for example, the belt end moves to the large diameter side of the right truncated cone roller, and the tension at the right end of the belt becomes partially very large. A force that pushes back the entire belt is generated on the left side of the belt to prevent meandering.

Each return roller 15 has an insertion hole for the roller support shaft 14 at the center. The bracket 13 is fixed to the nut 9 accommodated in a predetermined position in a T groove 7a formed in the lower portion of the frame 1 in the longitudinal direction by inserting the bolt 8 with the horizontal flange side of the bracket 13 with the bolt hole interposed therebetween. After that, the end of the roller spindle 14 inserted in the center of the cantilevered return roller 15 is fixed to the bearing hole 13a (FIG. 1) formed in the vertical flange side of the bracket 13.
In the figure, reference numeral 1a is a slide bed, 2, 3 are end plates of the frame 1, 7, 7a are T-grooves formed on the side wall and the lower surface of the frame 1, 8 is a bolt, 9 is a nut, and 10c is an elastic member. It is a geared motor supported in contact with the upper surface of 10b.

  The drive unit 10, for example, is substantially the same as that disclosed in Japanese Patent No. 318836 and Japanese Patent Application Laid-Open No. 2001-80718. A driving roller is pressed against the belt to be friction driven. That is, two jumper / support rods 10a, 10a are provided at intervals between the left and right side plates of the drive unit 10, and the support rods 10a, 10a are plates that urge the pair of left and right drive rollers 11 upward. The elastic member 10b such as a spring is hooked. The driving roller 11 is fixed to both ends of the output shaft of the motor 10c and is elastically brought into contact with the lower surface of the return side belt 6a. The belt 6 is sandwiched between the driving roller 11 and the receiving rollers 12 and 12 so as to be frictionally driven. Several sets of catch clips (not shown) are provided on the left and right side plates of the drive unit 10 so that the drive unit is removably assembled at a predetermined position of the frame 1.

FIG. 3 is an enlarged front view of the tail pulley side of the conveyor showing the second embodiment, and FIG. 4 is a plan view showing the belt of FIG. 3 omitted. In this embodiment, the frustoconical roller 16a disposed with the belt width end edge side having a large diameter and the small diameter side facing each other at a predetermined interval, and the same diameter as the small diameter side of the frustoconical roller 16a. A double-sided return roller 16 formed by an equal-diameter roller 16b that is coaxially disposed between the left and right conical rollers 16a and 16a is attached, and the lower surface of the return side belt 6a is pushed up and supported. Is. Small diameter shaft portions 16c (FIG. 4) are formed at both ends of the equal diameter roller 16b. The narrow shaft portions 16c are inserted into the shaft holes of the frustoconical roller 16a, and bolts 18 are attached from the outer surface of the end plate 3. The shaft member of the equal diameter roller 16b is fixed by inserting and tightening, and the conical roller 16a is rotatably supported by the small diameter shaft portion 16c. The end plate 3 is disposed on the outer surface of a nut (not shown) inserted in advance into the T groove 7 of the frame 1 and is fastened and fixed using bolts 17 and 17. The end pulley 5 is attached by a bolt 19 whose shaft member is screwed to the tip of the frame 1 and is rotatably supported.
Also in this case, since both ends in the width direction of the return side belt 6a are pressed and supported by the conical roller 16a of the double supported return roller 16 from the bottom, the belt meanders as in FIGS. When the belt moves to the large-diameter side of one frustoconical roller 16a, the tension is partially increased and the belt is prevented from meandering by pushing the belt back in the opposite direction.

  FIG. 5 is a front view of the third embodiment, and FIG. 6 is a cross-sectional view taken along line BB of FIG. In this example, two sets of brackets 13 and 13 are provided at the lower part of the frame substantially in the middle between the flick touch type drive unit 10 and the head-and-tail pulleys 4 and 5, and each bracket has a double-ended return roller having the same configuration as in FIG. 16 is attached, and the outer surface of the return side belt 6a is pressed and supported from below. FIG. 7 is a front view of the fourth embodiment, and FIG. 8 is a cross-sectional view taken along the line CC of FIG. In this example, two sets (four in total) of brackets 13 and 13 are provided at the lower part of the frame substantially in the middle between the flick touch type drive unit 10 and the head-and-tail pulleys 4 and 5, and a double-supported return roller 16 is attached. However, unlike the belt push-up support of FIG. 6, the inner surface of the return side belt 6a is pushed down.

FIG. 9 shows a front view of the fifth embodiment. The drive unit 20 of this example is a normal hanging type drive system attached in the middle of the frame 1, and is between a motor 21 and a sprocket 23 b provided at an interval from a sprocket 23 a provided on the output shaft of the motor 21. It is composed of a wound transmission member (chain) 22, a drive pulley 24 fixed to the shaft of the sprocket 23 b, and a pair of throttle pulleys 25, 25 arranged on the top of the drive pulley 24. One of the aperture pulleys may be provided with a take-up mechanism (not shown). The belt 6 travels around the end pulleys 26 and 27, one throttle pulley 25, the drive pulley 24, and the other throttle pulley 25. In the middle of the end pulley and the drive unit 20, near the end pulleys 26 and 27, both-end supported return rollers 16 and 16 having the same configuration as in FIG. 6 are provided to push up and support the return side belt 6a.
FIG. 10 is a front view of the sixth embodiment, which is the same as FIG. 9 except that the double-supported return rollers 16 and 16 are mounted approximately in the middle between the end pulley and the drive unit 20.

FIG. 11 is a front view of the seventh embodiment, and shows a configuration in which both-end supported return rollers 16 and 16 having the same configuration as that in FIG. 8 are attached to the middle of the end pulleys 26 and 27 and the drive unit 20.
By meandering the inner surface of the return side belt 6a with a double-supported return roller 16, the meandering of the belt is prevented.

  FIG. 12 is a front view of the eighth embodiment, and FIG. 13 is a cross-sectional view taken along the line D-D of FIG. 12. The drive unit 30 is fixed to the rear portion of the frame 1 and a sprocket 23a is provided on its output shaft. A sprocket 23b is provided on the shaft of the drive pulley 24, which is an end pulley, and the drive pulley 24 is driven by winding a transmission member (chain) 26 between the two sprockets. The cantilevered return roller 15 is fixed to two locations, a front portion of the return belt 6a that has passed through the downstream end pulley, and a rear portion near the drive pulley 24, and pushes up and supports the return belt 6a. In this embodiment, the sprocket 23a provided near the drive pulley 24 and the cantilevered return roller 15 are on the same axis.

  FIG. 14 shows a front view of the ninth embodiment. A drive unit 30 is fixed to one side of the frame 1, and a chain 26 is hung between sprockets 23a and 23b provided on the output shaft and the drive pulley shaft of the tail portion. Then, the belt 6 is driven. The double-sided return rollers 16 and 16 attached to the brackets 13 and 13 at the lower part of the frame prevent the meandering by pushing up and supporting the return side belt 6a from the lower surface at the front and rear sides of the return side belt 6a. .

  FIG. 15 is a front view of the tenth embodiment, in which a drive unit 30 is fixed to one of the frames 1, and a chain 26 is spanned between sprockets 23a and 23b provided on the output shaft and the end pulley shaft to drive the drive pulley 24. Driving is the same as in the case of FIG. 14, but both-end supported return rollers 16, 16 provided at two locations, the front part of the return side belt 6 a that has passed through the downstream end pulley and the rear part near the driving pulley 24. Thus, the return side belt 6a is brought into contact with the inner surface of the return side belt 6a to push down the return side belt. The cross section of the return roller mounting position is the same as in FIG. 8, and two sets of double-supported return rollers 16 are provided in the middle of the frame to push down the return side belt 6a. The belt can be prevented from meandering by the action. A timing belt or the like may be used as well as a winding transmission member for driving.

The front view of 1st Embodiment in the meandering prevention apparatus of this invention belt conveyor. Sectional drawing in the AA of FIG. The enlarged front view by the side of the tail pulley in 2nd Embodiment. FIG. 4 is a plan view showing the belt of FIG. 3 omitted. The front view of 3rd Embodiment. Sectional drawing in the BB line of FIG. The front view of 4th Embodiment. Sectional drawing in the CC line | wire of FIG. The front view of 5th Embodiment. The front view of 6th Embodiment. The front view of 7th Embodiment. The front view of 8th Embodiment. Sectional drawing in the DD line | wire of FIG. The front view of 9th Embodiment. The front view of 10th Embodiment.

Explanation of symbols

1 Frame 1a Slide bed 2,3 End plate 4,5 Head and tail pulley (end pulley)
6 belt 6a return side belt 7, 7a T groove 8 bolt 9 nut 10 drive unit 10a support rod 10b leaf spring 10c motor 11 drive roller 12 receiving roller 13 bracket 13a bearing hole 14 roller support shaft 15 cantilevered return roller 16 both Hand-held return roller 16a frustoconical roller 16b equi-diameter roller 16c small-diameter shaft portion 17, 18, 19 bolt 20, 30 drive unit 21 motor 22, 26 winding transmission member (chain)
23a, 23b Sprocket 24 Drive pulley 25 Diaphragm pulley 26, 27 Head / tail pulley

Claims (6)

  At least two sets of brackets are provided between the drive unit and the head-and-tail pulley at opposite positions on the lower or side of the conveyor frame. Each bracket has a large diameter at the edge in the width direction of the belt and a predetermined distance between the small diameter sides. A meandering prevention device for a belt conveyor, wherein a return roller formed by cantilevering a truncated conical roller facing each other is attached so as to push up and support the return side belt.   At least two sets of brackets are provided between the drive unit and the head-and-tail pulley at opposite positions on the lower or side of the conveyor frame. Each bracket has a large diameter at the edge in the width direction of the belt and a predetermined distance between the small diameter sides. A frustoconical roller disposed facing each other, and an equal-diameter roller having the same diameter as that of the small-diameter side of the frustoconical roller and coaxially disposed between the left and right conical rollers. A meandering prevention device for a belt conveyor, characterized in that a formed double-sided return roller is attached to support or push down the return side belt.   The double-ended return roller is a bearing in which narrow shaft portions formed at both ends of the equal diameter roller are inserted into shaft holes of the frustoconical roller, and the narrow shaft portion ends are opened in a bracket. The meandering prevention device for a belt conveyor according to claim 2, wherein the meandering device is inserted into a hole.  The drive unit is attached to an intermediate portion of the conveyor frame, and includes an elastic member that urges the drive pulley in the drive unit upward, and a pair of receiving rollers provided at a lower portion of the frame that is above the drive pulley, The meandering prevention device for a belt conveyor according to claim 1 or 2, wherein the belt conveyor is configured to be frictionally driven with a belt interposed between the driving pulley and the pair of receiving rollers.   The meandering prevention device for a belt conveyor according to claim 1 or 2, wherein the drive unit is configured by a normal hanging type drive pulley that is attached to an intermediate portion of the conveyor frame and includes a drive pulley and a pair of squeezing rollers.   The drive unit is provided at the rear part of the frame, and the cantilevered or double-supported return roller is provided at the middle part of the frame to push up and support the lower surface of the return side belt, or to push down the upper surface. The meandering prevention apparatus of the belt conveyor of Claim 1 or 2 characterized by the above-mentioned.

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