JP2005060005A - Conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To more surely prevent meandering and slip. <P>SOLUTION: Each pair of driving pulleys 28 and 29 and driven pulleys 46 and 47 having larger diameters than those of a driving shaft 25 and a driven shaft 45 is provided at a center part of the driving shaft 25 and the driven shaft 45. On both the sides, driving side auxiliary pulleys 30 and 31 and driven side auxiliary pulleys 48 and 49 having the same diameter as those of the pulleys 28, 29, 46 and 47 are mounted at prescribed intervals. The driven shaft side 45 is supported by a pair of arm members 40 and 41 and is energized in a direction separating from the driving shaft 25 by coil springs 35. A rib provided on an internal surface side of a carrier belt 50 is accepted between the driving pulleys 28 and 29 and between the driven pulleys 46 and 47 to be carried and driven. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a technique for preventing meandering and slipping of a conveyor belt in a conveyor for conveying articles.

  A conveyor for conveying articles generally has an endless conveyance belt stretched between a cylindrical driving roller and a driven roller, and a rotational force is applied to the driving roller from a driving device such as a motor. The articles are carried around and transported to the other end side of the articles carried on the upper surface on one end side of the conveyor belt.

  For example, when an article having a lot of moisture is conveyed by the conveyor having such a structure, the length of the conveyor belt is unevenly extended due to the moisture, and the conveyor belt slips or meanders. In particular, when the conveyor belt meanders, the edge of the conveyor belt comes into contact with the side of the conveyor frame and is damaged, causing a serious problem that the waste of the belt caused by the damage is mixed into a transported article such as food.

  In order to solve this problem, one roller is urged by a spring or the like in the direction in which the conveyor belt extends to prevent slipping, and a rib is projected from the inner surface side of the conveyor belt, and a driving roller and a driven roller There is a technology for preventing the movement of the conveyor belt in the width direction, that is, meandering, by providing a groove on the outer periphery of the belt and driving the groove with the rib of the conveyor belt received in the groove (Patent Document 1).

JP-A-11-334833

  However, as described above, one roller is urged in the direction in which the conveyance belt extends, and slippage and meandering of the conveyance belt are prevented by engagement between a rib projecting on the inner surface of the conveyance belt and a groove of each roller. Even in this case, there is a case where the stable running of the conveyor belt cannot be obtained.

  That is, each roller is formed of uniform material and thickness from end to end except for the groove, and the speed of every part is the same. When the speed varies in the width direction, a speed difference with the roller is generated in the width direction, an excessive force is applied to the conveying belt, and meandering or slip on the driving roller side occurs.

  Also, for the same reason, water adhering to the end of each roller is likely to flow around the entire gap between the roller and the conveyor belt, and the friction coefficient between the roller and the conveyor belt is significantly reduced, causing slip on the drive roller side. To do.

  In addition, since the surface area of each roller has a large surface area, dust tends to adhere to the roller, and the dust moves to the center of the roller and fills the groove. It was.

  An object of the present invention is to solve these problems and to provide a conveyor that can more reliably prevent meandering and slipping.

In order to achieve the object, the conveyor according to claim 1 of the present invention comprises:
A pair of side plates (21, 22) arranged in parallel with one side facing each other;
A connecting member (23) for connecting the pair of side plates;
A drive shaft (25) having both ends supported by one end of the pair of side plates;
A drive device (26) for rotationally driving the drive shaft in a predetermined direction;
A pair of drive pulleys (28, 29) that have a larger diameter than the drive shaft, are concentrically fixed at a central portion of the drive shaft with a predetermined gap, and rotate integrally with the drive shaft;
A drive side auxiliary pulley (30, 31) that is formed to have the same diameter as the pair of drive pulleys and is concentrically attached to the drive shaft at a position spaced from the pair of drive pulleys;
A pair of elongated holes (21a, 22a) respectively provided at predetermined positions on the other end side of the pair of side plates along the length direction of the side plates;
Both ends are inserted into the pair of elongated holes, and a sliding shaft (32) slidable in the longitudinal direction of the side plate along the elongated holes;
An urging member (35) for urging the sliding shaft in a direction away from the drive shaft;
A pair of arms that are supported at both ends of the sliding shaft and extend in parallel to each other up to a position where the other end projects from the other end of each side plate, and are pivotable about the sliding shaft Members (40, 41);
Stoppers (42, 43) for restricting lowering of the other end of the pair of arm members;
Both ends are supported on the other end side of the pair of arm members, and a driven shaft (45) parallel to the sliding shaft;
A pair of driven pulleys (46, 47) that are formed larger in diameter than the driven shaft and are concentrically attached with a gap equal to the gap between the pair of drive pulleys at the center of the driven shaft;
Driven auxiliary pulleys (48, 49) formed to have the same diameter as the pair of driven pulleys and concentrically attached to the driven shaft at positions spaced from the pair of driven pulleys;
An endless shape having a width that overlaps with each of the pulleys of the drive shaft and the driven shaft, and a rib having a width that enters the gap between the pair of drive pulleys and the gap between the pair of driven pulleys is formed continuously at the center on the inner surface side, A conveyor belt (50) that is stretched between a drive shaft and a driven shaft and travels by rotation of the drive pulley;
A restricting member (52) is provided between the drive shaft and the driven shaft and supports the upper traveling portion of the conveyor belt from below and restricts the drooping thereof.

Moreover, the conveyor of Claim 2 of this invention is the conveyor of Claim 1,
The restricting member has a plurality of rails (54) parallel to the pair of side plates and arranged with a predetermined gap therebetween, and supports the upper running portion of the conveyor belt from below by the plurality of rails. The two adjacent rails in the center of the plurality of rails are arranged with a gap that allows the ribs of the conveyor belt to pass therethrough and restricts the movement of the ribs in the width direction. Yes.

  As described above, the conveyor of the present invention is provided with a pair of driving pulleys and driven pulleys each having a larger diameter at the center portion of the driving shaft and the driven shaft, and on both sides thereof, the driving side auxiliary having the same diameter as these pulleys. A pulley and a driven auxiliary pulley are attached at a predetermined interval, the driven shaft side is supported by a pair of arm members and urged away from the drive shaft, and a rib provided on the inner surface side of the conveyor belt is provided between the drive pulleys. It is received and driven between the driven pulleys.

  As described above, since a plurality of pulleys are attached to the drive shaft and the driven shaft in a separated state and the outer periphery thereof is in contact with the inner surface side of the conveyor belt, the structure is made to travel. Even if the ink enters, the probability that the outer periphery of the driving pulley or the driven pulley adheres to the outer periphery of the driving pulley or the driven pulley is very low, and the probability of occurrence of slipping or meandering of the conveying belt is extremely low.

  In addition, each pulley other than the drive pulley can be structured to rotate independently, or can be made of a material that is slippery (low friction) with respect to the inner surface of the conveyor belt. Even if the running speed varies in the width direction, an excessive force is not applied to the conveyor belt, and slipping or meandering does not occur.

  In addition, since the restriction member for supporting the upper running part of the conveyor belt from below and restricting its drooping is composed of a plurality of rails and restricts the movement of the rib in the width direction, the upper part of the conveyor belt The meandering of the running part can also be restricted, and dust from the end part can be prevented from entering between the meandering regulation rails.

The drive side auxiliary pulley, the driven pulley and the driven side auxiliary pulley are rotatably attached to the drive shaft and the driven shaft, and the conveyor belt is easy to slip on the outer circumference of the drive side auxiliary pulley, the driven pulley and the driven side auxiliary pulley (coefficient of friction) By using a small one, do not apply excessive force to the running of the conveyor belt.
For stable running of the conveyor belt, the number and position of the driving auxiliary pulley and the driven auxiliary pulley are matched, and the rail of the regulating member comes between them.

  By adopting a structure in which the restricting member is supported using the connecting member, the number of parts can be reduced, and it is easy to remove and clean.

1-6 has shown the structure of the conveyor 20 to which this invention is applied.
As shown in FIGS. 1 to 3, the conveyor 20 has a pair of side plates 21 and 22 that are horizontally long and are arranged in parallel with one side facing each other.

  At predetermined positions on one end side of the pair of side plates 21 and 22, long holes 21a and 22a extending along the length direction of the side plates are provided, respectively.

  The pair of side plates 21 and 22 are connected by a plurality of (three in the figure) rod-like connecting members 23 that are horizontally mounted in front and back in between. One of the connecting members 23 connects the side plates at a position below the distal end side from the long holes 21a and 21b.

  Both end portions of the drive shaft 25 are rotatably supported between the other end sides of the side plates 21 and 22, and a drive shaft 25 is provided on one end side of the drive shaft 25 protruding outward from one side plate 21. A driving device 26 for rotationally driving in the direction is connected.

  A pair of drive pulleys 28 and 29 that are formed in a cylindrical shape having a larger diameter than the drive shaft 25, are concentrically fixed to the drive shaft 25 with a predetermined gap, and rotate integrally with the drive shaft 25. Is provided. At least the outer circumferences of the pair of drive pulleys 28 and 29 are made of a material having a large friction coefficient with respect to the inner surface of the conveyor belt (for example, a soft material such as urethane rubber) in order to reliably apply a running force to the conveyor belt 50 described later. Synthetic resin).

  Further, between the drive pulley 28 and the side plate 21 and between the drive pulley 29 and the side plate 22, drive side auxiliary pulleys 30, 31 formed in a cylindrical shape having the same shape as the drive pulleys 28, 29 are provided. , 29 are equidistant from the drive shaft 25 and are concentrically and rotatably mounted. In addition, although the example in case the two drive side auxiliary pulleys 30 and 31 are shown here, you may increase more drive side auxiliary pulleys.

  Further, when the driving side auxiliary pulleys 30 and 31 are rotatably attached to the driving shaft 25 as described above and can be freely rotated with respect to the driving pulleys 28 and 29, the driving side auxiliary pulleys 30, 31 are provided. The material may be the same as that of the drive pulleys 28 and 29. However, when the drive side auxiliary pulleys 30 and 31 are fixed to the drive shaft 25 and rotate integrally with the drive shaft 25, A material having a small coefficient of friction with respect to the inner surface of the conveyor belt 50 (for example, a hard synthetic resin) so that at least the outer periphery of the drive side auxiliary pulleys 30 and 31 does not apply excessive force to the travel of the conveyor belt 50 described later. It is desirable to form with.

  On the other hand, both end portions of a sliding shaft 32 slidable in the longitudinal direction of the long holes 21a and 22a are inserted into the long holes 21a and 22a of the side plates 21 and 22, respectively.

  A biasing member for biasing the sliding shaft 32 in a direction away from the drive shaft 25 between the sliding shaft 32 and the connecting member 23 located slightly below the distal end side of the long holes 21a and 21b. The coil spring 35 is hung.

  One end sides of a pair of arm members 40 and 41 are fixed to both ends of the sliding shaft 32 protruding to the outside of the side plates 21 and 22. The pair of arm members 40, 41 is a plate having an inverted L-shaped outer shape, and the distal end side extends in parallel to a position protruding from the distal end of each side plate 21, 22, and is rotatable about the sliding shaft 32. Is formed.

  The lower edge of one end side of a pair of arm members 40 and 41 is contact | abutted to the stoppers 42 and 43 which extended the both ends of the connection member 23 of the front end side which protrudes the outer side of the side plates 21 and 22. The lowering of the tip side of the pair of arm members 40, 41 is restricted and maintained in a substantially horizontal state. The stoppers 42 and 43 may be provided independently of the connecting member 23.

  A connecting member 44 is horizontally mounted between the intermediate portions of the pair of arm members 40 and 41, and both end portions of the driven shaft 45 parallel to the sliding shaft 32 are supported between the distal ends.

  A pair of driven pulleys 46 and 47 formed in a columnar shape having a diameter larger than that of the driven shaft 45 (same shape as the driving pulleys 28 and 29) are formed in the central portion of the driven shaft 45 from the gap between the driving pulleys 28 and 29. It is concentrically and rotatably attached to the driven shaft 45 with an equal gap.

  Between the driven pulley 46 and the arm member 40, and between the driven pulley 47 and the arm member 41, driven auxiliary pulleys 48 and 49 formed in a cylindrical shape having the same shape as the driven pulleys 46 and 47 are connected to the driven pulley 46. , 47 are attached concentrically and rotatably with respect to the driven shaft 45 at positions equidistant from each other (a distance equal to the distance between the drive pulley and the drive auxiliary pulley).

  As described above, in the case where the driven pulleys 46 and 47 and the driven side auxiliary pulleys 48 and 49 are rotatably attached to the driven shaft 45 and can rotate freely, respectively, the pulleys 46 on the driven side are provided. The material of -49 is arbitrary and may be the same material as that of the drive pulleys 28, 29, but the driven pulleys 46-49 are fixed to the driven shaft 45 so as to rotate integrally with the driven shaft 45. In this case, at least the outer circumferences of the pulleys 46 to 49 are made of a material (for example, hard synthetic resin) having a small friction coefficient with respect to the inner surface of the conveyor belt 50 so that an excessive force is not applied to the conveyor belt 50. It is desirable to form.

  The conveyor belt 50 is endless and has a width overlapping with the auxiliary pulleys on both sides of the drive shaft 25 and the driven shaft 45, and as shown in FIGS. 4 and 5, the gap between the pair of drive pulleys 28 and 29 and the pair of driven pulleys. A rib 51 having a width that enters the gap between 46 and 47 is formed continuously at the center on the inner surface side, is spanned between the drive shaft 25 and the driven shaft 45, and is driven by the drive pulleys 25 and 29 to drive the drive shaft 25 and the driven shaft. Travels between the shafts 45 in a circular manner.

  Between the drive shaft 25 and the driven shaft 45, a regulating member 52 for supporting the upper traveling portion of the conveyor belt 50 from below and regulating its drooping is disposed.

  The restricting member 52 has a length slightly shorter than the distance between the side plates 21 and 22 and is arranged in parallel at a distance slightly wider than the distance between the two connecting members 23 between the drive shaft 25 and the sliding shaft 32. And a plurality of (six in the figure) rails 54 fixed on the base members 53 in parallel with each other in a direction orthogonal to the base member 53 and with a predetermined gap therebetween. The two base members 53 are placed so as to sandwich the two connecting members 23, and are supported in a state in which the movement of the side plates 21 and 22 in the length direction and the width direction is restricted.

  The height of the upper surface of each rail 54 substantially coincides with the height of the outer peripheral upper ends of the drive pulleys 28 and 29 and the driven pulleys 46 and 47, and as shown in FIG. 50 upper running parts are supported from below. The rail 54 is formed of a material (hard synthetic resin) having a small friction coefficient with respect to the inner surface of the conveyor belt 50.

  The gap between the two rails 54 and 54 at the center is set to an interval that allows the rib 51 of the transport belt 50 to pass and restricts the movement of the rib 51 in the width direction. 54 is provided at intervals corresponding to a line connecting the driving side auxiliary pulleys 30 and 31 and the driven side auxiliary pulleys 48 and 49.

  When the drive shaft 25 is driven to rotate clockwise in FIG. 2 by the drive device 26 in the conveyor 20 configured as described above, the drive pulleys 28 and 29 at the center of the drive shaft 25 rotate integrally. The drive belt auxiliary pulley 30 is configured such that the conveyor belt 50 is circulated in a direction in which the upper side thereof is directed toward the drive pulleys 28 and 29, and the outer periphery is in contact with the inner surface side of the conveyor belt 50 as the conveyor belt 50 rotates. , 31, driven pulleys 46, 47 and driven auxiliary pulleys 48, 49 rotate.

  At this time, the sliding shaft 32 is urged in a direction away from the drive shaft 25 by the coil spring 35, and an appropriate tension is applied to the conveyor belt 50 by the urging force, so that the belt smoothly travels without slipping or the like. To do.

  Further, during this round traveling, the ribs 51 of the conveyor belt 50 are arranged such that the gap between the drive pulleys 28 and 29, the gap between the driven pulleys 46 and 47, and the rail 54 at the center of the regulating member 52, as shown in FIGS. Therefore, the belt travels linearly in parallel with the side plates 21 and 22 without meandering.

  Further, from the state shown in FIG. 7A, when the entire conveying belt 50 is uniformly extended and its tension is lowered, the sliding shaft is urged by the urging force of the coil springs 35 and 35 as shown in FIG. 7B. 32 moves parallel to the direction away from the drive shaft 25, stops at a position where the tension of the conveyor belt 50 and the biasing force of the coil spring 35 are balanced, and gives an appropriate tension to the conveyor belt 50, so that no slip occurs.

  Further, when the conveyor belt 50 extends unevenly in the width direction, for example, when a portion near the side plate 21 of the conveyor belt 50 extends, as shown in FIG. The end of the belt moves forward, and the tension of the conveyor belt 50 is made uniform.

  At this time, the driven shaft 45 is slightly inclined with respect to the drive shaft 25, and the traveling track of the rib 51 on the upper traveling portion side of the conveyor belt 50 tends to shift toward the side plate 22, but this shift is caused by the rail 54 of the regulating member 52. And the clearance between the driven pulleys 46 and 47.

  Further, among the pulleys that contact the inner surface of the conveyor belt 50, all the pulleys other than the drive pulleys 28 and 29 rotate independently of each other. Even if the directions vary, each of these pulleys rotates at a speed corresponding to the traveling speed of the contact portion with the conveyor belt 50. For this reason, an excessive force is not applied to the conveyance belt 50, and slipping and meandering do not occur. As described above, instead of adopting a structure in which all the pulleys other than the drive pulleys 28 and 29 are independently rotated, the friction coefficient between these pulleys and the conveyor belt 50 can be reduced as described above. The effect of can be obtained.

  Further, as shown in FIG. 8, even if the dust A adheres to the drive shaft 25 (or the driven shaft 45) from the end of the conveyor belt 50, the auxiliary pulleys 30 and 31 (48, 49) having a larger diameter than that. Prevents entry to the inside. In addition, even if dust attached to the outer periphery of each auxiliary pulley moves inward, there is a gap between the driving pulley and the driven pulley, so it cannot reach the outer periphery of the driving pulley or the driven pulley, and the driving pulley gap And does not enter the clearance of the driven pulley. Therefore, the probability of occurrence of meandering due to entry of dust and slip on the driving side is very low.

  Further, as shown in FIG. 9, even if moisture W enters the gaps between the auxiliary pulleys 30 and 31 (or 48 and 49) from the end of the conveyance belt 50, the auxiliary pulleys 30 and 31 (48 and 49). And the driving pulleys 28 and 29 (driven pulleys 46 and 47), the moisture W does not reach the outer periphery of the driving pulleys 28 and 29 (driven pulleys 46 and 47). Therefore, the probability of occurrence of meandering due to the ingress of moisture and slip on the driving side is very low.

  In the conveyor 20 having the above-described structure, as shown in FIG. 10, the leading end side of the arm members 40, 41 is rotated upward to cause a large slack in the conveyor belt 50, and the conveyor belt 50 can be easily moved sideways. Can be pulled out.

  The conveyor of the present invention can be applied to all the conveyors for conveying articles, and particularly, as in a food production line, the temperature and moisture change greatly, and there is a big problem of contamination of the belt due to meandering. And effective for a conveyor that requires easy cleaning.

Plan view of an embodiment of the present invention Example side view Exploded perspective view of the embodiment excluding the conveyor belt AA line sectional view of FIG. BB sectional view of FIG. CC sectional view of FIG. Operation explanatory diagram of the embodiment Operation explanatory diagram of the embodiment Operation explanatory diagram of the embodiment Operation explanatory diagram of the embodiment

Explanation of symbols

  20 ... conveyor, 21, 22 ... side plate, 21a, 22a ... long hole, 23 ... coupling member, 25 ... drive shaft, 26 ... drive device, 28, 29 ... drive pulley, 30, 31 ... ... Drive side auxiliary pulley, 32 ... sliding shaft, 35 ... coil spring, 40, 41 ... arm member, 42, 43 ... stopper, 44 ... connecting member, 45 ... driven shaft, 46,47 ... Drive pulley, 48, 49 ... driven side auxiliary pulley, 50 ... conveyor belt, 51 ... rib, 52 ... regulating member, 53 ... base material, 54 ... rail

Claims (2)

A pair of side plates (21, 22) arranged in parallel with one side facing each other;
A connecting member (23) for connecting the pair of side plates;
A drive shaft (25) having both ends supported by one end of the pair of side plates;
A drive device (26) for rotationally driving the drive shaft in a predetermined direction;
A pair of drive pulleys (28, 29) that have a larger diameter than the drive shaft, are concentrically fixed at a central portion of the drive shaft with a predetermined gap, and rotate integrally with the drive shaft;
A drive side auxiliary pulley (30, 31) formed to have the same diameter as the pair of drive pulleys and concentrically attached to the drive shaft at a position spaced from the pair of drive pulleys;
A pair of elongated holes (21a, 22a) respectively provided at predetermined positions on the other end side of the pair of side plates along the length direction of the side plates;
Both ends are inserted into the pair of elongated holes, and a sliding shaft (32) slidable in the longitudinal direction of the side plate along the elongated holes;
An urging member (35) for urging the sliding shaft in a direction away from the drive shaft;
A pair of arms that are supported at both ends of the slide shaft and extend in parallel to each other up to a position where the other end projects from the other end of each side plate, and are pivotable about the slide shaft Members (40, 41);
Stoppers (42, 43) for restricting lowering of the other end of the pair of arm members;
Both ends are supported on the other end side of the pair of arm members, and a driven shaft (45) parallel to the sliding shaft;
A pair of driven pulleys (46, 47) that are formed larger in diameter than the driven shaft and are concentrically attached with a gap equal to the gap between the pair of drive pulleys at the center of the driven shaft;
Driven auxiliary pulleys (48, 49) formed to have the same diameter as the pair of driven pulleys and concentrically attached to the driven shaft at positions spaced from the pair of driven pulleys;
An endless shape having a width that overlaps with each pulley of the drive shaft and the driven shaft, and a rib having a width that enters the gap between the pair of drive pulleys and the gap between the pair of driven pulleys is formed continuously at the center on the inner surface side, A conveyor belt (50) that is stretched between a drive shaft and a driven shaft and travels by rotation of the drive pulley;
A conveyor that is disposed between the drive shaft and the driven shaft and includes a regulating member (52) that supports the upper traveling portion of the conveyor belt from below and restricts the drooping thereof.   The restricting member has a plurality of rails (54) parallel to the pair of side plates and arranged with a predetermined gap therebetween, and supports the upper running portion of the conveyor belt from below by the plurality of rails. The two adjacent rails in the center of the plurality of rails are arranged with a gap that allows the ribs of the conveyor belt to pass therethrough and restricts the movement of the ribs in the width direction. The conveyor according to claim 1.

Images