JP2007106595A - Curved belt conveyor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a curved belt conveyor having a driving mechanism capable of stably rotation driving an endless curved belt even when being adhered with oil, water and powder on a surface thereof. <P>SOLUTION: A rotary member for endlessly rotating by sandwiching the belt from above and below, is arranged in any one or both on the forward passage side or the backward passage side of the curved belt on a line crossing at a right angle to the center line extending in the radial direction from the turning center of the curved belt near an outer peripheral edge part of the endless curved belt forming a plane circular arc shape. Among its pair of upper-lower rotary members, one rotary member is arranged by adjusting a central part of the machine length of its rotary member to an intersection of the line crossing at a right angle to the center line. The other rotary member is arranged by positioning the upstream side in the belt advancing direction on a central part of the machine length of the one rotary member or the downstream side of the belt advancing direction more than its position. The endless curved belt is rotated in the peripheral direction by the movement of a sandwiching place by the endless rotational movement of its rotary member. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a curved belt conveyor, and more particularly to a driving mechanism for driving and rotating an endless curved belt.

  As an endless curved belt drive system for curved belt conveyors, the outer peripheral edge of either or both of the forward path side (upper side) and the return path side (lower side) of the curved belt wound around a flat, substantially arc-shaped frame is a roller. A system is adopted in which a curved belt is driven by being sandwiched from above and below by (drive roller and pinch roller) and driving and rotating the roller (see, for example, Patent Document 1).

Since the curved belt conveyor described in Patent Document 1 does not have a hanging bar or a bead on the surface of the endless curved belt as in the past, the endless curved belt can be easily manufactured at low cost. Since there are no protrusions such as hooks and beads, the belt can be easily attached and detached.
However, since the drive roller and pinch roller are in line contact with the belt, when oil, water, powder, etc. adhere to the surface of the endless curved belt, the oil, water, etc. When adhering to the roller, the frictional force for pinching the endless curved belt is reduced, whereby the rotational transmission force to the endless curved belt is reduced, and the rotational running of the belt becomes unstable.

JP 11-59837 A

The present invention has been made in view of the above-described problems of the prior art, and its purpose is to stabilize the belt even when oil, water, powder, etc. adhere to the surface of the endless curved belt. It is another object of the present invention to provide a curved belt conveyor provided with a drive mechanism that can be rotationally driven.
Furthermore, another object of the present invention is to provide a curved belt conveyor provided with a drive mechanism that can reliably prevent the endless curved belt from shifting toward the turning center.
Still another object of the present invention is to provide a curved belt conveyor having a drive mechanism that can easily cope with a change in the width of the endless curved belt.

In order to achieve the above object, the curved belt conveyor of the present invention is configured such that either one of the outer circumferential edge of the endless curved belt or the outer circumferential edge of the endless curved belt, or both of the outer circumferential edges are radially directed from the turning center of the endless curved belt. It is sandwiched between a pair of upper and lower endless rotating members arranged on a line that intersects at right angles to the extending center line, and one of the pair of upper and lower rotating members is a central part of the length of the rotating member. Is arranged in accordance with the intersection of the lines perpendicular to the center line, and the other rotating member is located on the upstream side in the belt traveling direction on the center of the machine length of the one rotating member or in the belt traveling direction from the position thereof. The endless curved belt is rotated in the circumferential direction by moving the clamping portion by the endless rotation of the rotating member. That is, the curved belt conveyor according to the present invention clamps the outer peripheral edge of an endless curved belt from above and below by a rotating member that rotates endlessly, and moves the clamping portion by rotating the rotating member to move the curved belt in the circumferential direction. It is designed to rotate.
Examples of the clamping mode include a mode using the magnet's attracting action (Claim 2) and a mode using the crimping action by an elastic body such as a spring (Claim 8).
Further, the pair of upper and lower rotating members sandwiching the endless curved belt may be either a driving type or a combination of a driving type and a driven type.

According to the above means, the outer peripheral edge of the endless curved belt is clamped from above and below by the rotating member that rotates endlessly, and the clamped position moves from the upstream side to the downstream side in the belt traveling direction of the rotating member that rotates endlessly. By doing so, the endless curved belt is moved together in the circumferential direction. This operation is continuously performed by a rotating member that rotates endlessly, whereby the endless curved belt is driven to rotate.
The pair of upper and lower rotating members sandwiching the curve belt is disposed on a line perpendicular to the center line extending in the radial direction from the turning center of the endless curved belt, and one of the pair of upper and lower rotating members. The rotating member is arranged so that the center of the length of the rotating member is aligned with the intersection of the lines perpendicular to the center line, and the other rotating member is located upstream of the belt traveling direction of the one rotating member. The endless curved belt is driven and rotated while being urged radially outward because it is arranged on the center of the captain or on the downstream side in the belt traveling direction from the position. Further, the longer the clamping range between the pair of upper and lower rotating members, the greater the driving force.

The rotating member is a magnet having a predetermined interval between a rotating belt disposed endlessly on the radially inner side of the outer peripheral edge of the endless curved belt and an outer circumferential surface of the rotating belt (a surface facing the rotating members). Alternatively, a metal plate that is attracted to the magnet is fixed, and the curve belt is sandwiched between the magnets of the corresponding rotating members or the magnet and the metal plate are sandwiched and transferred. (Claim 2). When the magnets are attracted to each other, either the N pole or the S pole is fixed to the rotating band of one rotating member, and the rotating member magnet disposed on the rotating member corresponding to the rotating member has the magnet of the rotating member. And fix the magnet of the opposite pole that causes the adsorption action.
As the rotation band, a member having little elastic deformation and little elastic deformation, for example, a toothed belt (timing belt) made of rubber or resin is used, and a magnet or a metal plate is attached to the rotation belt via an attachment member. (Claim 3).
As a specific configuration of the mounting member, for example, a resin block in which a magnet or a metal plate is embedded, and a fixing pin that extends over the front and rear edges of the resin block, the magnet or the metal plate is embedded. Put the resin block on the outer peripheral surface of the toothed belt, and drive a fixing pin over the front and rear projecting edges of the resin block protruding from the both sides of the toothed belt in the width direction to the toothed belt. The block is mounted integrally (Claim 4). In addition to the toothed belt (timing belt), a chain, a steel belt, or the like can be used for the rotation band.

  According to the above means, the endless curved belt is sandwiched by the attracting action of the magnets fixed to the outer surface of the endless rotating rotation band or the attracting action of the magnet and the metal plate, and the magnets sandwiching the curved belt Alternatively, the magnet and the metal plate are moved from the start side to the end side of the rotation band by endless rotation of the rotation band. Thereby, the movement with the endless curved belt sandwiched is continuously performed by the endless rotation of the rotation band. And since the resin block in which the magnet or the metal plate is embedded is attached to the toothed belt with the fixing pin, it is possible to replace and replace the resin block (magnet or metal plate), and it is possible to replace the damaged member partially Become.

In the rotating member configured as described above, one driving type rotating member is arranged between the forward path side and the backward path side of the endless curved belt, A driven type rotating member is disposed on both outer sides of the return path side (the forward path side is the upper side and the return path side is the lower side), and the driven type rotating member on the forward path side and the return path side is the length of the drive type rotating member. It arrange | positions from the center part of this to the downstream of the belt advancing direction (Claim 5). In this case, the length of the drive type rotating member (the distance between the toothed pulley shafts) arranged between the forward path side and the return path side is the length of the driven type rotating member (the distance between the toothed pulley shafts). ) Is approximately twice as long.
And a pair (one set) of rotating members composed of the driving type rotating member and the driven type rotating member is arranged so as to intersect at right angles to the center line extending radially from the turning center of the endless curved belt. However, the number of columns to be arranged is not limited to one column and may be a plurality of columns. Further, when a plurality of rows are arranged, the rows may be arranged close to each other without a gap, or may be arranged with a predetermined gap between the rows.

According to the above-described means, when both the forward path side and the return path side of the endless curved belt are driven by being sandwiched between a pair of upper and lower rotating members, the rotating member disposed between the forward path side and the return path side is It can be shared as one of the rotation member on the side and the return path side.
Further, the length of the pair of upper and lower (one set) rotating members in the traveling direction is such that if the belt width of the endless curved belt is increased (widened), the driving force for nipping and conveying the belt must be increased accordingly. As a result, the middle rotation member disposed between the forward path side (upper side) and the return path side (lower side) becomes longer. However, in that case, it is necessary not only to make the length longer, but it is also necessary that the entire length of the pair of rotating members sandwich the endless curved belt. It must be moved from the outer peripheral edge side of the curved belt toward the turning center on the center line extending in the radial direction from the turning center of the belt. However, a short rotating member (middle rotating member) that generates a driving force equivalent to a substantially equal number (for example, 1/2, 1/3, etc.) of a driving force generated by a long row of rotating members is divided into an equal number (for example, 2 If they are arranged in parallel, the driving force generated thereby becomes substantially the same as that of the long row of rotating members. Since the rotating member is short, the position of the rotating member can be moved in the outer circumferential direction of the endless curved belt. As a result, it is possible to ensure a wide effective width for conveying the endless curved belt.

  Further, the rotating member disposed on the outward side or the returning side of the endless curved belt may be fixed at a predetermined position with respect to the frame so as to be able to maintain a clamping state with the other corresponding rotating member. Further, it may be configured to be able to switch between contact and separation with respect to the other corresponding rotating member. As a method of switching contact / separation, any method such as a method of rotating a member attached with a rotating member around one side or a method of linearly moving in a vertical direction may be used.

  According to the above means, the outer rotating member that clamps the forward path side or the return path side of the endless curved belt moves, so that the interval with the other rotating member that is sandwiched can be varied. Therefore, the clamping state can be released by moving the rotating member and opening the interval between the rotating members, and the endless curved belt can be easily attached and detached.

  In addition, the driven type rotating member arranged on the outer side of the endless curved belt on the forward path side and the return path side makes the entire rotating member reversible 180 degrees around the toothed pulley shaft on the upstream side in the belt traveling direction. The rotation direction of the rotating member may be switched between forward and reverse (claim 7).

  According to the above means, the driven type rotating member disposed on the outer side (upper side) of the endless curved belt (outer side) and the outer side (lower side) of the return path is connected to the toothed pulley shaft on the upstream side in the belt traveling direction. The rotation direction of the endless curved belt can be switched to the reverse direction by switching the rotation direction of the drive type rotating member disposed 180 degrees around the center and reversely rotating the drive type rotation member. At the same time, even when rotating in the opposite direction, the position of the pair of upper and lower rotating members sandwiching the endless curved belt is the same as that during forward rotation with respect to the center line extending radially from the turning center of the endless curved belt. Since the positional relationship between the pair of upper and lower rotating members that lie on a line intersecting at right angles and that sandwich the belt is the same, the endless curved belt can be rotated while being urged radially outward.

  Further, the rotating member is constituted by an endlessly rotating rotating band disposed at a position radially inward of the outer peripheral edge of the endless curved belt, and an elastic body fixed to the outer surface of the rotating band at a predetermined interval. The curved belt may be clamped by the elastic members of the corresponding rotating members sandwiched between the curved belts and transferred (claim 8).

The curved belt conveyor according to the present invention is configured to rotate endlessly on either the forward side or the backward side of the endless curved belt, or both of the outer peripheral edges on the forward side and the backward side of the endless curved belt. Since it is held by a member and moved, it has more clamping points (area) than a conventional structure that rotates with a roller, and since line contact becomes surface contact, oil, water, and powder are applied to the surface of the endless curved belt. Even if such a material adheres, the belt can be driven to rotate stably.
Also, since the starting end of one of the pair of upper and lower rotating members sandwiching the endless curved belt is positioned on the center line of the other rotating portion or on the downstream side thereof, the endless curved belt is moved radially outward. It can be energized to rotate. Therefore, it is possible to prevent the endless curved belt from moving toward the turning center side by the holding structure by the rotating member and the arrangement of the rotating member.

  And when the rotating member which clamps an endless curved belt is made into the composition of Claims 2 and 3, in order to clamp a curved belt with the attractive power of a magnet, it is not necessary to give special work to an endless curved belt A belt without a crosspiece can be used as it is. In addition, since the magnet is clamped by the attractive force of the magnet, the endless curved belt is hardly damaged and the life of the belt can be maintained for a long time. Furthermore, when it is set as the structure of Claim 4, while using the general purpose timing belt, the rotating member provided with the magnet can be configured easily, and when the magnet is damaged, the damaged resin block (magnet or metal plate) Therefore, it is possible to provide a rotating member with excellent repair and economy.

Further, in the case of the configuration described in claim 5, the rotating member disposed inside the curved belt among the upper and lower pair sandwiching the endless curved belt can be shared on the forward path side and the backward path side. And cost reduction.
Further, in the case of the configuration according to claim 6, since one (outer side) of the rotating member that holds the endless curved belt comes in contact with and separates, the holding state can be released by moving the rotating member. The belt can be easily attached and detached. Therefore, the endless curved belt can be easily replaced and cleaned.

When the configuration according to claim 7 is adopted, the driven rotating member disposed on the outer side of the forward path and the return path of the endless curved belt is reversed 180 degrees around the toothed pulley shaft on the upstream side in the belt traveling direction. In addition, by switching the rotation direction of the drive rotation member to the reverse direction, it is possible to drive and rotate not only in the normal rotation direction but also in the reverse rotation direction. In the reverse rotation, the belt can be urged and rotated radially outward as in the forward rotation. Further, in the case of the configuration according to claim 8, the outer peripheral edge of the endless curved belt Since the elastic member is mechanically pressure-clamped and transported, stable belt rotation can be ensured.
Further, with the configuration according to the ninth aspect, the length of the driving type rotating member (a pair of rotating members that sandwich and convey the belt) with respect to the expansion of the belt width (the opening angle is the same) of the endless curved belt ( This can be dealt with by arranging a plurality of rotating members having a short length in parallel without increasing the length of the rotating member (middle stage disposed between the forward path side (upper side) and the return path side (lower side)). Therefore, there is no need to prepare rotating members with different lengths according to the belt width size of the curved belt conveyor, and common parts can be used, such as arranging the same rotating members in one or two rows according to the belt width size. Is possible. Furthermore, since a plurality of rows of short rotating members are arranged, the arrangement position can be arranged in the outer peripheral direction of the endless curved belt as compared with the case where one row of long rotating members is arranged, thereby ensuring a large conveyance effective width. I can do it.

Hereinafter, an example of an embodiment of a curved belt conveyor according to the present invention will be described with reference to the drawings.
FIG. 1 shows a curved belt conveyor A provided with a rotating mechanism according to the present invention. The curved belt conveyor A is a tail roller of a folding member on both sides in a circumferential direction of a flat frame 1 having a substantially fan shape. 2 and 2 ′ are rotatably mounted with an opening angle of 90 ° in plan view, and an endless curved belt 3 is wound around the tail rollers 2 and 2 ′ so as to have a substantially circular arc shape in plan view. Is configured. At the middle position in the circumferential direction of the frame 1, the endless curve belt 3 is positioned on a line Y that intersects at right angles to the center line CL extending radially from the turning center O of the endless curve belt 3. Rotating mechanisms 4 and 4 'composed of a pair of upper and lower rotating members 4a and 4b and 4a and 4c that sandwich the outer peripheral edge portions on the forward path side and the return path side from above and below are arranged. A driving mechanism 5 that drives and rotates the rotating member 4 a is provided along the outer peripheral edge of the frame 1.

The tail rollers 2 and 2 ′, which are folded members on both sides in the circumferential direction of the frame 1, have a number of small rollers 2 a formed in a short cylindrical shape, and tail roller shafts corresponding to the belt width of the endless curved belt 3. By being rotatably mounted on the outside of 2b, it is configured as a long shaft roller having the same diameter over the shaft length.
The tail roller shaft 2b that rotatably supports the small roller 2a spans between the bearing members 6a, 6b and 7a, 7b of the frame 1 provided on the inner peripheral portion and the outer peripheral portion on both sides of the frame 1, respectively. The tail cores of the tail roller shafts 2b are arranged at an opening angle of 90 ° in plan view. It should be noted that the turning center O of the endless curved belt 3 is set at a location where the extension lines of the outer diameters of the tail roller shafts 2b intersect.

  The small rollers 2a fitted in parallel along the tail roller shaft 2b are configured such that the individual small rollers rotate independently. That is, the curved belt conveyor has different peripheral speeds on the inner peripheral side and the outer peripheral side of the endless curved belt 3, but as described above, the tail rollers 2, 2 ′ supporting both ends of the endless curved belt 3 are provided. By configuring a large number of small rollers 2a in parallel on the tail roller shaft 2b, each small roller 2a is configured to rotate at a peripheral speed at each position. In addition, since the small roller 2a is composed of a roller having a sufficiently small outer diameter, the small roller 2a is generated at a connecting portion with the other conveyor connected to the curved belt conveyor A at the conveyance direction start end side and the conveyance direction end side. The step (gap) can be kept small.

The endless curved belt 3 wound between the tail rollers 2 and 2 'is configured as a donut-shaped sheet having a substantially truncated cone shape, and is folded into a flat fan shape to fold the frame. The large-diameter side that becomes the outer peripheral portion is fitted from the center side of 1. Thereby, the conveyance path which becomes a circular arc shape of a substantially fan shape in a plan view is configured. As the endless curved belt 3, a strong wire (core material) is radially provided in the thickness of the endless curved belt 3 in the belt width direction, so that the belt width direction and the rotation direction are evenly compressed. It is preferable to use an increase.
The substantially entire surface 3a of the endless curved belt 3 wound between the tail rollers 2 and 2 'is supported from below by a flat frame 1 that supports the tail rollers 2 and 2'. It is configured as follows. Both end edges in the circumferential direction of the frame 1 extend to the vicinity of the tail rollers 2 and 2 ′.

The rotation mechanism 4, 4 'for driving and rotating the endless curved belt 3 is an endless rotating driving rotating member 4a disposed between the forward path side 3a and the return path side 3b of the endless curved belt 3. And driven rotation members 4b and 4c that rotate endlessly and are arranged on the outer side (upper side) of the belt on the forward path side 3a and on the outer side (lower side) of the return path side 3b in correspondence with the drive rotation member 4a. Yes. The turning mechanism 4 for driving the outward belt 3a of the endless curved belt is composed of a drive rotating member 4a and a driven rotating member 4b arranged above and below the outward belt 3a, and the return path of the endless curved belt. The rotation mechanism 4 ′ for driving the side belt 3b is composed of a drive rotation member 4a and a driven rotation member 4c arranged above and below the return path side belt 3b.
The drive rotating member 4a passes through an arbitrary point x1 on the inner side of the outer peripheral edge of the endless curved belt 3 on the center line CL extending in the radial direction from the turning center O. It is arranged on a line Y intersecting with L at a right angle and with the approximate center of the length of the drive rotating member 4a positioned at the point x1. The center line CL is reasonable in the vicinity of the radiation from the turning center O shown in the figure toward the center of the aircraft, but may be at any position as long as the radiation extends in the radial direction from the turning center O.
The driven rotating member 4b is arranged such that the center line of the captain is positioned on the line Y on the belt outer side (upper side) of the forward path side 3a of the endless curved belt 3 and the approximate center on the upstream side in the belt traveling direction (of the toothed pulley The center) is aligned with the point x1, and the downstream side in the rotational direction is arranged toward the downstream side in the traveling direction of the curve belt.
The driven rotating member 4c is configured such that the center line of the captain is positioned on the line Y on the belt outer side (lower side) of the return path side 3b of the endless curved belt 3 and the upstream center in the belt traveling direction (toothed pulley). Is centered on the point x1, and the downstream side in the rotational direction is arranged toward the downstream side in the traveling direction of the curve belt.
That is, the driven rotating member 4b, the driving rotating member 4a, and the driven rotating member 4c are arranged on the line Y so as to overlap each other.

Hereinafter, the drive rotation member 4a and the driven rotation members 4b and 4c constituting the rotation mechanisms 4 and 4 ′ will be described. Since the drive rotating member 4a and the driven rotating members 4b and 4c have the same structure, the drive rotating member 4a will be described below (see FIGS. 2 and 3).
The drive rotating member 4a is configured by a toothed belt (rotating band) 8 that rotates endlessly and a magnet 9 fixed to the outer surface of the toothed belt 8 at a predetermined interval.
The fixing of the magnet 9 to the toothed belt 8 is performed by integrally embedding the magnet 9 in a resin block 10 covering the width direction of the toothed belt 8, and integrally projecting at the front and rear ends of the block 10, The fixed pin 11 is driven over the protruding edges 10a and 10b protruding inward from the edge in the width direction of the toothed belt 8, so that the block 10 in which the magnet 9 is embedded is integrated with the outer surface of the toothed belt 8. It is fixed. Magnetization of the magnet 9 is performed by applying a voltage after embedding in the block 10.
Moreover, the position where the block 10 in which the magnet is embedded is attached to the toothed belt 8 is between the convex portions 8a protruding at a predetermined pitch on the inner surface of the toothed belt 8, and between the convex portions 8a. The fixing pin 11 is constructed in the recess 8b. The fixing pin 11 is installed at a position where the outer peripheral surface of the fixing pin 11 comes into contact with the bottom surface of the recess 8b, whereby the block 10 is joined and integrated with the toothed belt 8 without backlash.
Further, since the endless curved belt is clamped by the attracting action of the N pole and S pole of the magnet 9, when the magnetic pole of the magnet 9 provided in the drive rotating member 4a disposed in the middle is set to the N pole, it is arranged vertically. The magnetic poles of the magnets 9 mounted on the driven rotating members 4b and 4c are S poles.

  The drive rotation member 4a extends over toothed pulleys 13a and 13b that are pivotally supported at predetermined intervals on a mounting plate 12 that is vertically fixed along the outer peripheral edge of the frame 1 in the middle in the circumferential direction. Is wound. The shaft 14a to which one of the toothed pulleys 13a is fixed protrudes outward from the mounting plate 12 via a bearing 15 mounted on the mounting plate 12, and the drive mechanism 5 is connected to the protruding portion. Further, the shaft 14b to which the other toothed pulley 13b is attached is fitted in a long hole 16 formed in the attachment plate 12 so as to be adjustable in position so that the distance between the shaft 14a and the shaft 14a can be adjusted. Thus, the tension of the toothed belt 8 can be adjusted by moving and adjusting the shaft 14b along the elongated hole 16.

  The driven rotation member 4b is wound around an auxiliary mounting plate 17 mounted on the inner side of the mounting plate 12 over toothed pulleys 18a and 18b that are rotatably supported at predetermined intervals. The shaft 19b to which the toothed pulley 18b located downstream in the traveling direction of the endless curved belt 3 is fixed has an inter-axis distance from the shaft 19a to which the other toothed pulley 18a located upstream in the traveling direction is attached. It fits in the long hole 20 opened in the auxiliary | assistant mounting plate 17 so that adjustment is possible. Thus, the tension of the toothed belt 8 can be adjusted by moving and adjusting the shaft 19b along the long hole 20. If only the tension of the toothed belt 8 is adjusted, the shaft for movement adjustment may be any of the shafts 19a and 19b, but the action of urging the outer peripheral edge of the endless curved belt 3 to be described later outward in the radial direction. In order to assure more, the toothed pulley 18b located on the downstream side in the traveling direction of the endless curved belt 3 can be moved and adjusted.

  The driven rotating member 4c is wound around a toothed pulley 21a, 21b rotatably supported by an auxiliary mounting plate 17 'mounted inside the mounting plate 12 at a predetermined interval in the circumferential direction. Yes. The shaft 22b, to which the toothed pulley 21b located downstream of the endless curved belt 3 is fixed, has a distance between the shaft 22a and the shaft 22a attached with the other toothed pulley 21a located upstream of the traveling direction. It is fitted in a long hole 23 provided in the auxiliary mounting plate 17 'so that it can be adjusted. Thus, the tension of the toothed belt 8 can be adjusted by moving and adjusting the shaft 22b of the toothed pulley 21b along the long hole 23. The tension adjustment of the toothed belt 8 of the driven rotation member 4c in the return path side rotation mechanism 4 ′ is the same as the tension adjustment of the toothed belt 8 of the driven rotation member 4b in the rotation mechanism 4 on the forward path side. Similarly, in order to further secure the action of urging the outer peripheral edge of the endless curved belt 3 radially outward, the toothed pulley 21b located on the downstream side in the traveling direction can be moved and adjusted.

The auxiliary mounting plate 17 to which the rotating member 4b is attached and the auxiliary mounting plate 17 'to which the rotating member 4c is attached are supported so as to be swingable up and down with respect to the mounting plate 12 having the rotating member 4a. .
Specifically, as shown in FIG. 2, the auxiliary mounting plate 17 to which the rotating member 4 b is attached and the auxiliary mounting plate 17 ′ to which the rotating member 4 c is attached are located downstream in the traveling direction of the endless curved belt 3. The shafts P and P 'on the side of the toothed pulleys 18b and 21b are supported so as to be swingable up and down, and the range of the vertical swing established on the mounting plate 12 is restricted to the opposite side of the shaft supports P and P'. Stopper pins 25 and 25 'are provided to be fitted into the arc grooves 24 and 24'.
With the above configuration, when the auxiliary mounting plates 17 and 17 'are supported in a horizontal state, the rotating members 4a, 4b, and 4c maintain a parallel state as shown in FIG. 2, and the endless curve is formed between the rotating member 4b and the rotating member 4a. The forward path side 3a of the belt 3 is clamped, the return path side 3b of the endless curved belt 3 is clamped by the rotating member 4a and the rotating member 4c, and the endless curved belt 3 is rotated in the circumferential direction. Then, when the auxiliary mounting plate 17 is swung upward about the shaft support P and the auxiliary mounting plate 17 ′ is swung downward about the shaft support P ′, it rotates with the rotating member 4b as shown by the phantom line in FIG. The member 4c moves in the separating direction with respect to the rotating member 4a located in the middle, and the clamping state until then is released. Thereby, the endless curved belt 3 can be easily attached and detached.

  The drive mechanism 5 drives and rotates the rotating member 4a. As shown in FIG. 2, the drive sprocket is attached to a shaft 14a to which a toothed pulley 13a that supports the rotating member 4a disposed in the middle in the vertical direction is fixed. The chain 5d is wound around the sprocket 5c fixed to the drive sprocket 5a and the output shaft of the motor 5b suspended and fixed to the frame 1 so that the rotating member 4a is driven to rotate by the rotational force of the motor 5b. It is configured. The drive mechanism 5 is not limited to the form shown in the figure, and a drive method employed today is appropriately selected, such as a drive system in which a gear and timing belt or a hollow shaft geared motor is attached and a sprocket is omitted. It is possible.

  The driven rotation member 4b that holds the forward path side 3a of the endless curve belt 3 and the driven rotation member 4c that holds the return path side 3b of the endless curve belt 3 face each other and rotates and rotates. The magnets 9 mounted on the members 4a, 4b and 4c are attracted to each other with the belt interposed therebetween, whereby the rotating members 4b and 4c are driven to rotate by the rotation of the rotating member 4a.

  As the magnet 9 attached to the toothed belt (rotating belt) 8 of the rotating members 4a, 4b, and 4c through the resin block 10, neodymium, ferrite, or the like is used. In the usage situation of the curved belt conveyor, it may be necessary to wash with water after use, but since the magnet 9 is embedded in the resin block 10 as described above, even when washed with water, the magnet is directly washed with water. It is possible to prevent the magnet from rusting.

  FIG. 7 is an explanatory view showing the arrangement relationship of the rotation mechanisms 4 and 4 ′ in the curved belt conveyor shown in the previous embodiment. From the turning center O of the endless curved belt 3 to the substantially central portion (circumferential direction). A drive rotation member 4a and driven rotation members 4b and 4c are arranged as shown in FIG. 7B on a line perpendicular to the center line CL extending to the substantially central portion.

Next, the mechanical action when the above-described rotation mechanisms 4 and 4 ′ are rotated will be described with reference to FIGS. 8 to 9 based on the driven rotation member 4c on the return path side.
FIG. 8 is an explanatory view showing the arrangement of the driven rotation member 4c that holds the belt on the return path side in the endless curved belt 3, and is driven with respect to the center line CL extending in the radial direction from the turning center O of the endless curved belt 3. A center line Y (refer to FIG. 1) of the length of the rotating member 4c is arranged so as to intersect at right angles, and an intersection of the center line and the center line CL is defined as x1. The axis of the toothed pulley 21a of the driven rotating member 4c is disposed on the intersection x1, and the magnet 9 of the toothed belt 8 is attracted to the magnet 9 of the toothed belt 8 of the corresponding driving rotating member 4a on this line. Rotate by driving rotation of the driving rotating member 4a. As a result, the intersection point x1 rotates in accordance with the rotation of the drive rotating member 4a and moves on the center line Y toward the traveling direction of the curve belt. A point moved on the center line Y by an arbitrary distance is defined as x2. The relationship of the force at the point x2 after the movement is shown by a vector diagram (see FIG. 9).

A center line extending from the turning center O to the point x2 is defined as Y ′. Then, the force acting in the direction perpendicular to the center line Y 'from the point x2 and F _1.
The force F ₁ acts in the tangential direction, that is, at right angles to the center line Y ′ when the endless curved belt 3 rotates about the turning center O. Further, the force acts on the center line by the rotation of the driven rotating member 4c. That is, the force acting on the arbitrary point x2 is the force F2 acting on the extension line of the center line Z. Therefore, the resultant force F3 acts in the resultant direction of the forces F1 and F2 acting on the belt 3b on the return path side of the endless curved belt 3. As a result, a force F4 (F2sin α °) for urging the endless curved belt 3 in the F3 direction, that is, outward is generated (see FIG. 9).
The force F4 for urging the outer side is a suction range (from the suction start position to the suction release position) of the drive rotary member 4a and the driven rotary member 4c constituting the turning mechanism 4 ′ that holds the belt on the return path side. Range)) continuously. Therefore, this continuous outward biasing force is exerted by the overlapping length of the pair of upper and lower rotating members constituting the rotating mechanism. In addition, since the endless curved belt is sandwiched and moved, even if oil or powder adheres to the endless curved belt, the effect is less than that of the friction drive, and the endless curved belt can be stably driven. be able to.
Although the return path side has been described here, the same can be said for the forward path side.

FIG. 10 shows another embodiment of the curved belt conveyor according to the present invention, in which the driven rotary members 4b and 4c arranged above and below the drive rotary member 4a in the previous embodiment are positioned on the upstream side with respect to the belt traveling direction. The driven rotary members 4b and 4c are entirely configured to be 180 ° reversible around the shafts 19a and 22a of the toothed pulleys 18a and 21a. That is, as shown in FIG. 10B, the positions of the toothed pulleys 18a and 21a of the driven rotating members 4b and 4c are changed by reversing 180 degrees from the position of the previous embodiment (the position indicated by the phantom line). Instead, the other toothed pulleys 18b and 21b are moved to positions (positions indicated by solid lines) that are symmetrical to those in the previous embodiment.
Therefore, if the rotation direction of the drive rotation member 4a is switched to the opposite direction to that in the previous embodiment, the rotation direction of the endless curved belt 3 becomes the arrow direction as shown in FIG. It rotates in the direction opposite to the rotation direction. Even when the driven rotating members 4b and 4c are inverted by 180 °, the positional relationship of the driven rotating members 4b and 4c with respect to the driving rotating member 4a does not change. Therefore, the endless curved belt is moved radially outward even in the reverse rotation. The energizing force is generated in the same manner, and stable running can be ensured.

  When the driven rotating members 4b and 4c are reversible by 180 degrees, the auxiliary mounting plates 17 and 17 'to which the rotating members 4b and 4c are attached are also configured to be reversed by 180 degrees around the shafts 19a and 22a, respectively. The fixing means is fixed to the inverted state by the stop means. The support of the toothed pulley shaft to the auxiliary mounting plate may be a general round hole and shaft fit, but the shaft supporting shaft is a long hole in the vertical direction, and the toothed pulley shaft slides up and down. It may be made possible. Further, the toothed pulley shaft may be urged by an elastic body attached to the auxiliary mounting plates 17 and 17 'so as to be always pressed against the belt.

The endless curved belt holding structure in the above-described embodiment is such that the magnet 9 is attached to the rotating belts disposed above and below the belt and is held by the magnet's attracting action, but is held by an elastic body. It is good also as a structure.
For example, in the embodiment of FIG. 2, a pressure plate urged outward by a spring is provided on the surface of the resin block 10 facing the endless curved belt, and the belt is sandwiched between the pressure plates.

FIG. 11 is a view showing another example of the arrangement of the rotating members in the curved belt conveyor according to the present invention. The configuration of the rotating member is the same as that shown in FIG. 2 except that the rotating direction of the curve belt (the rotating direction of the outward path) is reversed, and detailed description thereof is omitted. In addition, “length L1” and “length L2” described below correspond to a rotating member in the middle stage disposed between the forward path side (upper side) and the backward path side (lower side) (corresponding to the driving rotary member 4a in FIG. 2). )) In the rotational direction.
The rotation of the endless curved belt in the present invention is performed by nipping and conveying by a pair of upper and lower rotating members, but the size of the belt width of the endless curved belt (the dimension from the inner edge near the turning center to the radially outer edge). Depending on the size, the ability (length in the advancing direction, lateral width of the rotating member, etc.) of the pair of upper and lower rotating members that sandwich and convey the endless curved belt also changes.
For example, a row of rotating members Z1 having a length L1 is arranged in an endless curved belt having a belt width S1 shown in FIG. When an endless curved belt having a belt width S2 (S2> S1) wider than the belt width S1 is to be configured, the rotating member Z1 having the length L1 has insufficient capacity, and has a length as illustrated. It is necessary to arrange a rotating member (horizontal width is the same) Z2 of L2 (L2> L1). Since the rotary member having the length L2 needs to hold the endless curved belt over its entire length, the arrangement position of the rotary member Z2 is a line that intersects at right angles to the center line extending in the radial direction from the turning center. Is a position where the length of the dimension (string) between two points where the both ends of the belt and the outer peripheral edge of the endless curved belt intersect is substantially the same as the length L2 of the rotating member Z2.

  When the ability of the rotating member Z2 having the length L2 is approximately twice as large as the ability of the rotating member Z1 having the length L1, the same clamping is achieved by arranging two sets of the rotating members Z1 having the length L1. Transport is possible. That is, as shown by the solid line in FIG. 11, the rotating members Z1 having the length L1 are arranged in two rows in parallel. In that case, the position where the rotating member Z1 is disposed is between the two points where both ends of the line intersecting at right angles to the center line extending in the radial direction from the turning center and the outer peripheral edge of the endless curved belt intersect as described above. This is a position where the length of the string (string) is substantially the same as the length L1 of the rotating member. Accordingly, the positions where the two rows of the rotation members having the length L1 are arranged are positions moved radially outward from the positions where the rotation members having the length L2 are arranged as shown in the figure.

Therefore, when the belt width is increased, the driving force necessary for nipping and conveying can be ensured by increasing the length of the rotating member in accordance with the belt width. The same driving force can be secured by arranging a plurality of rotating members in parallel. When a plurality of rows are arranged, the following advantages can be obtained as compared with the configuration in which long rows of rotating members are arranged.
(1) A wide conveyance effective width of the endless curved belt can be secured.
(2) It is not necessary to prepare rotating members having different lengths according to the belt width size.
(3) The rotating members in each row arranged in parallel can be driven by one drive source, but when driven by independent drive sources, they can be driven according to the peripheral speed of each row. .

  The curved belt conveyor of the present invention sandwiches the outer peripheral edge of either the forward path side or the backward path side of the endless curved belt, or both of them with a rotating member that rotates endlessly across the belt, Since the endless curved belt is rotated in the circumferential direction by the movement of the clamping portion by the endless rotation of the rotating member, the endless curved belt can be stably and reliably rotated. The endless curved belt is arranged above and below the belt, and the clamping part is clamped by a rotating member mounted in the belt, so that the clamping member does not protrude greatly outward in the radial direction from the belt, so the entire conveyor is compact. It has the advantage that it can be configured.

The present invention is not limited to the above-described embodiments, and can be appropriately changed within the scope of the gist of the present invention.
(1) The forward-side turning mechanism and the return-side turning mechanism are arranged in the same place by sharing the drive rotation member. However, the outgoing-side and return-side turning mechanisms are separated and arranged separately. Also good.
(2) The attachment form of the magnet with respect to the rotation band in the rotation member is not limited to the illustrated embedding form, and any form such as a form in which the magnet is fixed to the outside of the rotation band via a press fitting or the like may be used. Further, the shape of the magnet is not limited to the rectangular flat plate shape shown in the figure, and may be any disk shape.
(3) The pair of upper and lower rotating members that sandwich the belt may be of a synchronous drive type as well as one.
(4) The surface of the rotating member (the surface that comes into contact with the endless curved belt) is not limited to a flat surface, and may be an uneven surface.
(5) The center line CL extending in the radial direction from the turning center O of the curved belt is not limited to the central portion of the airframe shown in the embodiment, and may be any radiation extending in the radial direction from the turning center O.
(6) The curved belt conveyor of the present invention is not limited to the one having an opening angle of about 90 ° in plan view shown in the embodiment, but 90 ° or less (for example, 45 °, 60 °), or 90 ° or more (for example, 180 °).

The partially notched top view which shows an example of implementation of the curved belt conveyor which concerns on this invention. The expanded sectional view which follows the (2)-(2) line | wire of FIG. The expanded sectional view of the principal part. The expanded sectional view which follows the (4)-(4) line | wire of FIG. The partially cutaway perspective view showing the configuration of the rotating member. The partial notch disassembled perspective view which shows the attachment structure of the magnet with respect to a toothed belt (rotating belt). The arrangement | positioning relationship of the rotation member in the Example of FIG. 1 is shown, (a) is a top view, (b) is a principal part expanded sectional view. Explanatory drawing which shows arrangement | positioning of the rotation member of a return path side. Explanatory drawing which shows the relationship of the force generate | occur | produced by rotation of the rotation member shown in FIG. Other embodiment is shown, (a) is a top view, (b) is a principal part expanded sectional view. Explanatory drawing which shows other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS A ... Curve belt conveyor 1 ... Frame 2, 2 '... Folding member (tail roller) 3 ... Endless curved belt 4, 4' ... Turning mechanism 4a-4c ... Rotating member
5 ... Drive mechanism 8 ... Toothed belt (rotating belt)
9 ... Magnet 10 ... Resin block 11 ... Fixing pin

Claims (9)

  An endless curved belt having a planar arc shape is wound around folded members disposed on both sides in the circumferential direction of the frame having a planar arc shape, and close to the outer peripheral edge of the endless curved belt positioned between the folded members. In addition, on the line intersecting at right angles to the center line extending in the radial direction from the turning center of the curved belt, the belt is moved from the upper and lower sides to one or both of the forward path side and the return path side of the endless curved belt. A rotating member that rotates endlessly is disposed, and one rotating member of the pair of upper and lower rotating members is aligned with the intersection of the lines intersecting the central line at right angles with the center of the rotating member. The other rotating member is arranged such that the upstream side in the belt traveling direction is positioned on the central portion of the machine length of the one rotating member or on the downstream side in the belt traveling direction from the position, and the endless end of the rotating member is arranged. Times Curve belt conveyor, characterized by rotating the endless curved belt in the circumferential direction by the movement of the clamping portion due.   The rotating member includes an endless rotating rotating band disposed at a position radially inward from an outer peripheral edge of the endless curved belt, and a metal plate that adsorbs to the magnet at a predetermined interval on the outer circumferential surface of the rotating band. 2. The curve belt according to claim 1, wherein the curve belt is clamped and transferred by attracting magnets of corresponding rotating members or by attracting magnets and a metal plate with the curve belt interposed therebetween. Conveyor.   The curve belt conveyor according to claim 2, wherein a rotation belt of the rotating member is a toothed belt, and a magnet or a metal plate is attached to the rotating belt via an attaching member.   The mounting member is composed of a resin block in which a magnet or a metal plate is embedded, and a fixing pin that extends over the front and rear edges of the resin block, and the resin block in which the magnet or the metal plate is embedded is toothed. Covering the outer peripheral surface of the belt, and driving the fixing pin over the front and rear projecting edges of the resin block protruding from the both sides in the width direction of the toothed belt to attach the block integrally to the toothed belt The curved belt conveyor according to claim 3.   The pair of rotation members includes one drive rotation member disposed between the forward path side and the return path side of the endless curved belt, and the outer sides of both the forward path side and the return path side corresponding to the one drive rotation member. The driven rotation member disposed on the forward path side and the return path side is disposed downstream from the center of the length of the drive rotation member in the belt traveling direction. The curved belt conveyor according to any one of 1 to 4.   6. The rotating member disposed on the outward path side or the returning path side of the endless curved belt is configured to be capable of switching to and away from the corresponding other rotating member. A curved belt conveyor according to any one of the above.   6. The curved belt conveyor according to claim 5, wherein the driven rotating member is configured such that the entire driven rotating member is reversible by 180 degrees about a toothed pulley shaft on the upstream side in the belt traveling direction.   The rotating member is configured by an endless rotating belt disposed radially inward from the outer peripheral edge of the endless curved belt, and an elastic body fixed to the outer surface of the rotating band at a predetermined interval. The curved belt conveyor according to claim 1, wherein the curved belt is sandwiched and transferred by pressure-bonding elastic bodies of corresponding rotating members with the belt interposed therebetween.   6. The curve belt conveyor according to claim 5, wherein the pair of rotating members are arranged in a plurality of rows so as to intersect at right angles to a center line extending in a radial direction from a turning center of the endless curve belt.

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