JP3227125B2 - Curve belt conveyor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curved belt conveyor, and more particularly, to an improved curved belt conveyor for rotating a conveyed material from a starting end of the conveyor by 180 degrees (U-turn) and discharging the conveyed product to an end of the conveyor. About.

[0002]

2. Description of the Related Art Some conventional curve belt conveyors include:
The conveyed material conveyed from the normal conveyor is turned 180 degrees (U-turn) and conveyed out to another conveyor 18
A 0 ° turning type curve belt conveyor has been developed (JP-A-49-58566, JP-A-50-31577).
No., JP-A-61-145027, Japanese Patent Publication No. 5-3984
No. 7).

As shown in FIGS. 15 (a) and 15 (b), the above-described conventional curved belt conveyor 100 is provided with a highly flexible circular belt 101 rotatably driven, and the above-mentioned belt 101 By exposing one half of the half-circle to a semi-circle, the conveyed object is rotated by 180 ° and conveyed to form a semi-circular conveying surface 101a in plan view. Also,
At the start and end of the transfer surface 101a, a carry-in conveyor 102 and a carry-out conveyor 103 which are linear conveyors are provided.
Of the belt 101 are connected to each other.
b is rotated under the condition that it is inserted under both of the conveyors 102 and 103.

However, in the curved belt conveyor 100 configured as described above, it is necessary to match the transport surfaces of the carry-in conveyor 102 and the unload conveyor 103 with the transport surface 101a of the curve belt conveyor 100 at the same level. Therefore, it is necessary to minimize the height h of the connection ends of the two conveyors 102 and 103 as much as possible. Further, it is necessary to sharply bend the belt 101 at the start and end portions of the circular belt 101, and although the flexibility of the belt 101 is good, its flexibility is also limited. Therefore, it is necessary to provide a large gap i between the start end and the end which are the connecting portions between the conveyors 102 and 103. As a result, in the curved belt conveyor 100, the transfer of the conveyed material may not be performed smoothly.

[0005] As described above, the circular belt 10
In a curved belt conveyor 100 having a structure in which the other half 101b of the first conveyor 101 is inserted under the connection end of the carry-in conveyor 102 and the carry-out conveyor 103, the carry-in conveyor 10
There is a possibility that the hand may be drawn into the gap between the connection part 2 and the unloading conveyor 103, and the connection part cannot be used with the above-mentioned connection part exposed in order to ensure safety. Therefore,
It is necessary to provide a cover or the like in the same part to ensure safety. For this reason, the belt conveyor 100 has a problem that the disassembly and assembly work during maintenance work becomes complicated due to the presence of the cover and the like. In addition, the belt 10
1 is required to have high flexibility and high rigidity.
2 and under the unloading conveyor 103, it is necessary to provide good flexibility as well. As a matter of course, the belt 101 satisfying the above-mentioned requirements is very expensive. .

On the other hand, in the conventional 180 ° turning type curved belt conveyor, besides the 180 ° turning type curved belt obtained by rotating and driving the above-mentioned circular belt, bead is also used.
There is a curved belt of the type (Japanese Patent Laid-Open No. 50-3157)
No. 7). As shown in FIGS. 16A and 16B,
A bead type curved belt conveyor 200 is obtained by folding a curved belt 201 having an opening at the center into two sheets, and a pair of tapered rollers 202 provided at a start end and an end of the conveyor.
a and 202b.

In the curve belt conveyor 200, a bead 204 is provided along the outer peripheral edge of the curve belt 201, and at appropriate intervals along the front side and the back side along the outer circumference of the curve belt 201. The guide roller 203 is set in place. The guide rollers 203 on both the front and back surfaces are brought into contact with the bead 204 provided along the outer peripheral edge of the curved belt 201 from the inner peripheral side of the turning, whereby the curving belt 201 is always directed to the outer side of the turning. The curved belt 201 is maintained so as not to move toward the inside of rotation during the rotation driving.

However, in the bead type curved belt conveyor 200 described above, the curved belt 201
Since a large number of guide rollers 203 are required to stably rotate the roller, the holding mechanism provided along the outer periphery of the belt becomes very complicated, and maintenance and maintenance become complicated, noise increases, and cost increases. In order to cause a rise and the like, improvement is required.

[0009] The above-mentioned curved belt conveyor is
Since the tapered rollers 202a and 202b that support both ends of the curved belt are formed in a conical shape due to the peripheral speed, the shape of both ends of the transport path also becomes conical. as a result,
The diameter of the roller connected to the other conveyor, especially the outer peripheral side of the transport path becomes large, and a large step is generated in the connecting portion on the outer peripheral side of the transport path. In addition, when a light and small conveyed object moves over the connection portion, a problem occurs in that the conveyed object is smoothly transferred, such as a shift or a fall.

[0010]

Therefore, in order to avoid the above-mentioned problems that occur in the conventional curve belt conveyors 100 and 200, an inner peripheral portion is provided at the center portion as in the case of the curve belt conveyor disclosed in JP-A-7-277436. Construct a circular curve belt with an open section, and install several other tough linear reinforcing members radially within the thickness of the curve belt, so that the curve belt has circumferential flexibility. And those having diametral toughness have been developed. The curve belt is folded in two and mounted between the start and end rollers, and a number of guide rollers are provided along the inner peripheral portion of the central portion of the conveyor belt, thereby forming the curve belt. The inner peripheral edge is supported from the inside by each guide roller, and receives a force to shift the rotationally driven curve belt toward the center of rotation to maintain the tension of the curve belt.

However, as described above, the force for shifting the curve belt toward the turning center tends to increase as the belt width increases, so that the belt can be used without any problem in a narrow belt width, but the belt width is wide. As the belt becomes unbearable, a phenomenon occurs in which the belt intermediate portion is deformed so as to rise. Therefore, even if the conveyor can convey a light and short conveyed product by reducing the step at both ends of the conveyer, the bulging of the belt adversely affects the conveyed product. In other words, it can be said that the above-mentioned curved belt conveyor is effective only for a small-sized belt having a narrow belt width.

By the way, in the food industry, the introduction of the Hazard Analysis and Critical Control Point (HACCP) proposed in the United States for the fear of pathogenic bacteria such as O-157 is accelerating. Belt conveyors
Hygiene management based on the above HACCP is being studied.

For example, in order to maintain the hygiene of the belt conveyor, it is preferable to periodically remove the machine body and the belt itself and carefully wash and sterilize the same in order to suppress the propagation of various bacteria. Conventionally, a linear belt conveyor has been developed in which the belt is easily loosened by flipping up the end of the conveyor (Japanese Utility Model Publication No. 5-33459). In the belt conveyor, as described above, the holding mechanism and the like are extremely complicated. Therefore, it takes a considerable amount of time to loosen the curved belt even for a familiar operator. Such work was forced.

An object of the present invention is to provide a 180 ° turning type curve belt conveyor as described above, which is provided so that a curve belt can be easily attached / detached and a connection step at both ends of the conveyor can be reduced. An object of the present invention is to drive a belt conveyor with a simple driving mechanism without any trouble.

[0015]

In order to solve the above-mentioned problems, a curved belt conveyor according to the present invention has a plurality of small rollers formed in a substantially short cylindrical shape arranged in parallel to form a substantially long axis. And a pair of rollers configured such that each of the small rollers can freely rotate individually. The two rollers are arranged side by side on a single shaft, and are disposed between the ends of the opposed rollers. Provide a small interval, in the center of the small interval,
A center pin protruding so as to be orthogonal to the one axis in a plan view is arranged, and between the rollers or the knife edge in a state where a circular curved belt is folded into two sheets. By attaching the center pin from the inside of the belt to the insertion hole formed in the center of the curve belt while attaching the curved belt, a semicircular transport path that rotates 180 ° about the center pin in plan view is formed. Supporting the forward path surface of the curve belt from the back side of the belt with a flat base, supporting the center pin and both rollers by the base, and forming a plurality of belt clamping units along the outer periphery of the curve belt. These belt holding units are inserted and installed between the outward path and the return path on the outer peripheral portion of the curved belt, and are also viewed in plan. A middle roller, which is rotatably supported with its axis aligned on a reference line extending from the center of rotation of the curve belt to the belt outer periphery, and installed on the outward path surface of the outer periphery of the curve belt, A pinch roller for pressing the outer peripheral surface of the middle roller with the belt therebetween,
A pinch roller installed below the return surface of the curved belt outer peripheral portion and pressed against the outer peripheral surface of the middle roller with the curved belt interposed therebetween, and at least one of the belt clamping units. The drive mechanism is connected to the roller to drive the middle roller so as to be rotatable, and the curved belt sandwiched between the outer peripheral surface of the middle roller and both the forward and backward pinch rollers is configured to be rotatably driven. The forward and backward pinch rollers of each belt clamping unit are rotatably supported with their shaft cores tilted in a predetermined direction with respect to a reference line in a plan view, and are brought into contact when the pinch rollers rotate. The outer peripheral portion of the curved belt is urged outward in the turning direction.

According to the above-described means, the two rollers arranged side by side on one shaft center are formed by arranging a large number of small rollers each having a short cylindrical shape side by side on the same axis to form an outer shape substantially in the form of a long axis. This allows each of the small rollers to freely rotate individually. Also, a small interval is provided between the ends of the two rollers, and a center pin is disposed at the center of the small interval. In the curve belt conveyor of the present invention, the center pin is set at the center, and the roller side supporting one half is the start end of the conveyor, and the roller side supporting the other half is the end of the conveyor.

A circular curved belt is mounted between the two rollers or between the knife edges in a state of being folded in two. A center pin protruding from the center of the small interval portion is inserted from the inside into an insertion hole formed in the center of the curve belt. As a result, the curved belt mounted between the rollers is guided so as to be able to turn 180 ° about the center pin, and the curved belt forms a substantially semicircular transport trajectory in plan view. still,
The above-mentioned conveying track is the outward surface of the curve belt, and the lower surface thereof is the backward surface.

The outward surface of the curved belt is kept flat by being supported from the back side of the belt by a flat base. Further, the center pin and both rollers are mounted and supported on the base.

A plurality of belt clamping units are provided along the outer periphery of the curved belt. The belt clamping unit includes a middle roller and a forward-side return-side both-pinch roller. The middle roller is rotatably installed so as to be inserted between the outward path and the return path in the outer peripheral portion of the curve belt. The two pinch rollers are provided on the outward road surface of the outer peripheral portion of the curved belt and below the return road surface. Both of these pinch rollers are pressed against the outer peripheral surface of the middle roller so as to sandwich the curved belt.

Therefore, the outward path of the curve belt outer peripheral portion,
The both sides of the return path are sandwiched between the middle roller and the pinch roller, and by the pressing force of the pinch roller,
A friction force is generated between the outer peripheral surface of the middle roller and the inner surface of the curved belt and between the outer peripheral surface of the curved belt and the pinch roller. Further, a driving mechanism is connected to at least one of the middle rollers of the belt holding units, and the middle rollers are driven and rotated. Therefore, the rotation of the middle roller causes the curve belt to rotate about the center pin as the center of rotation, and the forward and return pinch rollers rotate following the rotation of the curve belt. .

As described above, both the forward and backward pinch rollers corresponding to the driving and rotating middle rollers pivotally support their respective shaft cores in a state of being inclined in a predetermined direction with respect to a reference line in plan view. Thus, it rotates in contact with the curved belt via the above-mentioned inclination angle. The contact forces of the forward and return pinch rollers act outwardly by the amount of the inclination angle, and as a result, the outer peripheral portions of the curve belt on the forward and return sides respectively rotate. Energize outward. This urging force acts as a force that stretches the semicircular curved belt from the center to the outer periphery, thereby maintaining the curved belt in a clean semicircular shape and preventing swelling and loosening.

On the other hand, in the belt clamping unit in which the driving mechanism is not connected to the middle roller, the middle roller does not rotate by itself as described above, but the rotation of the curve belt as described above causes the rotation of the curve belt. The middle roller and both pinch rollers, which pinch the forward path and the return path, receive the contact force of the pinching portion and rotate so as to follow the curved belt. Further, both the forward and backward pinch rollers of both belt clamping units are in contact with the curved belt through the inclination angles in the same manner as described above. Therefore,
These two pinch rollers are similar to the two pinch rollers of the belt holding unit in the central portion described above,
The contact force with the curved belt acts toward the outside of the turn.

This urging force is applied to the forward side of the curved belt at the installation portions of the belt clamping units on both sides.
The return-side outer peripheral portion is urged toward the turning outside.
In other words, in a curved belt having a semicircular shape in plan view, a force urged toward the outer side of the turn acts at each place where each belt holding unit is installed, giving tension to the curved belt to prevent swelling and loosening. To prevent.

The curved belt conveyor according to claim 2 is
The outer peripheral portion of the base of the curved belt conveyor is supported by a conveyor body member on the outer peripheral edge side of the curved belt, and the base is supported in a cantilever manner. In this case, the outer peripheral portion of the base supporting the center pin and the two rollers is supported in a cantilever manner by a conveyor main body member located outside the outer peripheral edge of the semicircular curved belt in plan view. That is, the base is supported by the conveyor body at the outer peripheral portion, and is supported with the center pin side extending substantially horizontally.
Therefore, the curved belt is also supported by the base having the center pin side as the extending end, and draws a 180 ° turning trajectory in plan view. In addition, according to the support of the base in the cantilever state as described above, the semicircular curved belt in plan view, which is supported on the outward road surface side by the base, holds each belt holding the outer peripheral portion of the belt. By removing the holding by the unit, it can be pulled out from the center side.

The curved belt conveyor according to claim 3 is
2. The curved belt conveyor according to claim 1, wherein an outer peripheral portion of a base for supporting a forward path surface of the curved belt from the back side of the belt is supported by a conveyor body member on an outer peripheral side of the curved belt and supported by the base. The protruding end of the center pin is rotatably supported by a pin supporting member which is detachably attached to and supported by a member on the belt center side of the conveyor body.

According to the above means, the outer peripheral portion of the base supporting the center pin and both rollers is supported by the conveyor body member located outside the outer peripheral edge of the curved belt having a semicircular shape in plan view, and the base of the base is supported. By supporting the protruding end of the center pin mounted and supported on the center side with a pin support member, the center pin is supported in a double-supported state. As described above, the base that supports the turning outer peripheral portion and the center portion is firmly supported in a double-supported state, so that even if the transport path is enlarged, the load due to its own weight or the weight of the transported object is obtained. Thereby, it is possible to prevent the base from sagging and vibration from being generated during rotation.

Also, since the pin support is detachably attached to and supported by the center pin and the conveyor body,
By removing the pin supporting member, the base is brought into a state of being supported in a cantilevered state as in the case of the curved belt conveyor according to claim 2, and in this state, each belt clamping unit that clamps the outer peripheral portion of the curved belt. The curved belt can be pulled out from the center side by removing the sandwiching portion of the curved belt.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. The curved belt conveyor A shown in FIG. 1 to FIG. 5 conveys a conveyed article carried at the start end of the conveyor along a conveying path formed by a curved belt 1 having a semicircular arc shape in plan view. The goods are turned 180 degrees, that is, turned around and carried out in a U-turn, and are carried out. By connecting a normal linear conveyor to the carry-in side and the carry-out side of the curved belt conveyor A, a distribution line for making the goods U-turn is constituted. I do.

The curved belt conveyor A has a leg a1
, A conveyor body a is installed. The conveyor main body a serving as a frame is configured to horizontally support a flat base 8 formed in a half octagonal shape in which an octagon is halved (FIG. 1A). The base 8 supports the forward road surface of the curved belt 1 having a semicircular shape in a plan view from the back side and maintains the forward road surface in a flat shape. The base 8 is further divided into two parts from the central portion of the half octagon to form a quarter member 8a. And 8b.
The two quarter members 8a and 8b of the base 8 are detachably connected via a connecting member 8c formed in a substantially band shape in plan view, and are configured as a flat surface for supporting an outward path surface of the curve belt 1 described later from the back side. I have.

A peripheral wall plate 8 is provided on the outer peripheral edge of the base 8.
1, the rigidity of the base 8 is increased. As described above, a straight portion that becomes a semi-octagonal radius portion, that is, 180
部位 Rollers 2a are located at the start and end of the conveyor.
And the roller 2b are installed in a straight line.
By mounting the curved belt 1 between the positions b, a conveying trajectory having a semicircular shape in plan view is formed.

Further, on the outer peripheral portion of the curved belt 1,
Two belt clamping units b1 and b2 each having a middle roller 4 and two pinch rollers 5 and 6 are arranged at intervals in the circumferential direction. The curved belt conveyor A is provided with each of the middle rollers 4 of each of the belt clamping units b1 and b2.
By rotating the curved belt 1 in a state where the outer peripheral side edge of the curved belt 1 is sandwiched between the pinch rollers 5 and 6, the curved belt 1 is rotationally driven in the transport direction ( (Fig. 2).

The rollers 2a and 2b are formed as long shaft rollers having the same diameter by rotatably fitting a large number of small rollers 20 formed in a short cylindrical shape along the outer periphery of a support shaft 21. is there. The rollers 2a and 2b are connected to the base 8
The length of each support shaft 21 is set to be substantially the same as the approximate radius of the support shaft 21.
Are respectively arranged along the edges of the radial portion of the base 8 serving as the start end and the end of the transport path, and the bearing members 22, 22 ′ and 23, 23 ′ provided at the edges of the radial portion of the base 8. The two rollers 2a and 2b are arranged side by side on a single shaft core 2 'by being horizontally installed and supported between the rollers. Also, the straight edge of the radius portion of the base 8 is
Each reaches just before the rollers 2a and 2b (FIG.
a).

That is, the roller 2a and the roller 2b are installed at an opening angle of 180 °. The two rollers 2
The turning center O of the curve belt 1 is set so as to be located on an extension of the outer diameters of a and 2b (FIG. 1A).

As described above, a number of small rollers 20 arranged in parallel along the support shaft 21 of both rollers 2a, 2b are configured to rotate independently. That is, the curve speed of the curve belt conveyor is different between the inner circumference side and the outer circumference side of the curve belt 1. As described above, the rollers 2a and 2b supporting the start end and the end of the curve belt 1 are coaxial. By arranging a number of small rollers 20 on the upper side, each small roller 20 is configured to rotate at the peripheral speed of each position. The rollers 2a, 2b
Can be configured to have a sufficiently small outer diameter, so that a step generated at a connection portion with another conveyor connected to the start end and the end of the curve belt conveyor of the present application can be suppressed to an extremely small level. Further, the rollers 2a and 2b may be knife edges.

The curved belt 1 mounted between the rollers 2a and 2b is formed by cutting a belt material sheet having an appropriate flexibility into a circular shape, and is folded in two to form the curved belt 1 between the rollers 2a and 2b. To form a transport trajectory that is semicircular in plan view. An insertion hole 1a through which a center pin 9 to be described later is inserted is formed in the center of the curved belt 1 formed in a circular shape as described above. The outer peripheral edge of the curved belt 1 is formed in a flat shape, and no protrusion such as a crosspiece or a bead is formed. Also,
There is no strong wire (reinforcement) inside the material sheet.

As described above, a small interval e is provided between the ends of the two rollers 2a and 2b arranged side by side on one shaft core 2 '.
, And a center pin 9 described later is protruded from the center of the small interval portion e. The center pin 9 is inserted from the inside into the insertion hole 1a serving as the center of the curved belt 1 mounted in a state of being folded in between the rollers 2a and 2b as described above, and the curved belt 1 is rotationally driven. When doing
It functions as a support shaft for guiding the center of the curved belt 1 at the turning center O (FIG. 3).

As shown in FIG. 3, the center pin 9 is
A substantially bullet-shaped head 93 is rotatably supported at the distal end of the support shaft 91 via a bearing 92, and the base end of the support shaft 91 is located at the center side end of the connection member 8 c at the center of the base 8. By being inserted and screwed, it is mounted and supported so as to project horizontally toward the center of the small interval e provided between the rollers 2a and 2b (FIG. 1B). The center pin 9
Is a single shaft center 2 ′ between the rollers 2a and 2b.
At the same level as above, and the tip of the above-mentioned substantially bullet-shaped head 93 passes through the turning center O of the curved belt 1 and is further than the most protruding surfaces of the rollers 2a and 2b. It is supported so as to protrude (FIG. 1-b, FIG. 3).

As a result, the tip of the head 93 of the center pin 9 is inserted from the inside into the center insertion hole 1a of the curve belt 1 mounted between the rollers 2a and 2b, and from the insertion hole 1a to the outside. Project to That is, both rollers 2a, 2b
The curve belt 1 attached in between is guided by the center pin 9 so that the center portion stays at one point during the rotational driving by inserting the tip of the center pin 9 into the center hole 9a. Rotate accurately to avoid eccentricity.

As described above, the outward side of the curved belt 1 mounted between the rollers 2a and 2b is supported from below by the base 8 which is flat and substantially horizontal as described above (FIG. 2). ). The base 8 is formed in a substantially semi-octagonal shape in a plan view as described above, and the forward side of the curved belt 1 in a semi-circular shape in a plan view mounted between the rollers 2a and 2b in a state of being folded in two. Is fully supported from behind,
A slight surplus portion is left outside the outer peripheral edge of the curved belt 1 (FIG. 1A).

The base 8 comprises a peripheral wall plate 81 provided on the outer peripheral portion,
Unit substrates b1 ', b for mounting the clamping units b1, b2 mounted on the left and right sides of the outer periphery of the conveyor body a.
The outer peripheral portion of the base 8 is attached and fixed to the conveyor main body a by abutting against the 2 'and screwing, and is installed horizontally along the straight lower surface on the outward side of the curve belt 1 (FIG. 2). ). That is, the base 8 is supported in a cantilevered state with respect to the conveyor main body a via the peripheral wall plate 81 on the outer peripheral portion and the two unit substrates b1 'and b2'. The base 8 supported in a cantilever state as described above is horizontally supported such that the peripheral wall plate 81 side is a base end, and the rollers 2a, 2b and the center pin 9 side are extended ends.

On the other hand, two belt clamping units b1 and b2 are installed at a predetermined interval in the circumferential direction on the outer peripheral side of the curved belt 1 of the conveyor body a. In the case of this embodiment, the two belt holding units b1 and b2 extend from the turning center O of the curved belt 1 toward the installation position of the belt holding units b1 and b2 on the outer periphery of the curved belt 1 in plan view. The angle between the reference lines L1 and L2 is 9
It is installed at a position where it becomes 0 °.

The belt clamping units b1 and b2 rotate the curved belt 1 and urge the outer peripheral edge of the curved belt 1 toward the outer side of the turn so that the curved belt 1 is driven and rotated. 1 is provided with an appropriate tension to prevent the curve belt 1 from becoming loose, and includes a middle roller 4 and two pinch rollers 5 and 6.

Further, the curved belt conveyor A is configured such that a drive mechanism c is installed in both the holding units b1 and b2, and the middle roller 4 of both the units b1 and b2 is driven to rotate. The two belt clamping units b1 and b2 are unit boards b1 ′ and b that are mounted and fixed on the conveyor body a.
2 'is constituted by pivotally supporting the middle roller 4 and the pinch rollers 5 and 6 (FIGS. 4, 5A and 5B).

The middle roller 4 of the two belt clamping units b1 and b2 is for rotating the curve belt 1 by contacting the outer peripheral portion of the curve belt 1 mounted as described above and rotating the same. In a state where the axis 4 ′ is aligned with reference lines L1 and L2 extending from the turning center O of the curve belt 1 to the installation position of the belt holding units b1 and b2 on the outer periphery of the curve belt 1 in plan view. The shaft is rotatably driven (FIGS. 1 and 5B). The middle roller 4 is installed at the center of the outer periphery of the curved belt 1 through which the reference lines L1 and L2 pass, and the shaft core 4 'is inserted horizontally between the outward path and the backward path of the curved belt 1. (FIG. 2, FIG. 5-a).

The middle roller 4 is a cylindrical body whose outer peripheral surface is made of a non-slip or non-slip material.
a. The middle roller 4 is inserted into the mouth of the outer peripheral portion of the curved belt 1, and a support shaft 4 a protruding horizontally toward the outside of the curved belt 1 from the inner peripheral side of the unit boards b 1 ′ and b 2 ′. It is inserted outward and inserted into the gear box c1 of the drive mechanism c installed on the back of the substrates b1 'and b2', and connected so as to be able to rotate.

The middle roller 4 projects the uppermost portion of the outer peripheral surface slightly from an opening 83 formed in the outer peripheral portion of the base 8, so that the curved belt 1 slides along the upper surface of the base 8. The inner surface on the outward path is brought into contact with the inner surface on the return path of the outer peripheral portion of the curved belt 1 (FIGS. 1 and 2). As described above, the gear box c1 of the drive mechanism c is connected to the conveyor body a
A drive motor c2 mounted and fixed on the outer surface of the unit boards b1 'and b2' mounted and fixed thereon.
Thus, the support shaft 4a of the middle roller 4 is driven to rotate at a predetermined rotation speed.

The two belt clamping units b1 and b2 are
A pinch roller 5 and a pinch roller 6 are provided immediately above the curve belt 1 going road surface corresponding to the installation position of the middle roller 4 and immediately below the returning road surface, respectively.
The outer peripheral surface of the curve belt 1 is sandwiched between the outer peripheral surface of the curve roller 1 and the outer peripheral surface of the return roller. The pinch rollers 5 and 6 are configured to freely rotate by being fitted to the outer circumferences of the support shafts 5a and 6a via bearings (not shown).

The two pinch rollers 5 and 6 are rotated by inserting and fixing the respective support shafts 5a and 6a to shaft insertion portions 73 formed in the intermediate portions of the rotation arms 71a and 71b. From the intermediate portion of the arms 71a and 71b, the shaft core 5 ',
6 'is supported so as to project substantially horizontally. Rotating arm 71a on the outward path of both belt clamping units b1 and b2
Is one end of the unit board b of the gear box c1.
The other end side of the arm 71a is supported so as to rotate in the vertical direction by being pivotally mounted on 1 'and b2'. Further, the support shaft 5a of the pinch roller 5 is inserted into the shaft fitting portion 73 of the rotating arm 71a and fixed horizontally as described above, and the support shaft 5a and the pinch roller 5 are connected to the rotating arm 71a. , The pinch roller 5 is supported so as to be located directly above the middle roller 4 (FIGS. 4 and 5A).

On the other hand, the return arm 71b of the belt holding units b1 and b2 has one end connected to the unit board b.
By being pivotally attached to the lower side of the middle roller 4 at 1 'and b2', it is supported so as to rotate in the same manner as the rotation arm 71a. The support shaft 6a of the pinch roller 6
Is fitted and fixed in the shaft fitting portion 73 of the rotating arm 71b, whereby the support shaft 6a and the pinch roller 6 are fixed.
Project horizontally from the rotating arm 71b, and support the pinch roller 6 so as to be located immediately below the middle roller 4.

The two rotating arms 7 supported as described above.
A coil spring 72 is provided between the distal ends of the rotary arms 71a and 71b, respectively, and the tension of the coil spring 72 draws the distal ends of the two rotary arms 71a and 71b. The two pinch rollers 5 and 6 supported on the intermediate portion are always pressed against the outer peripheral surface of the middle roller 4. That is, as described above, the two pinch rollers 5 and 6 urged by the coil spring 72 are connected to the outer peripheral portion of the curve belt 1 on the outward path,
While sandwiching the outer periphery on the return path side,
Will be pressed against the outer peripheral surface of. The pressing force of the two pinch rollers 5, 6 against the middle roller 4 can be adjusted by replacing the coil spring 72 itself, or by extending the coil with a screw or the like to change the stroke.

Therefore, both belt clamping units b1,
When the middle roller 4 of b2 is driven to rotate in the normal rotation direction, the forward side of the curve belt 1 with which the outer periphery of the middle roller 4 contacts rotates from the start end to the end of the conveyor, and at the same time,
The return side of the curve belt 1 rotates from the end of the conveyor to the start. At the same time, the above-mentioned curve belt 1
Pinch rollers 5 and 6 that come into contact with the forward path and the return path
Rotates following the rotation of the curve belt 1.

The forward and backward pinch rollers 5, 6 are connected to the shaft insertion portions 7 of the rotating arms 71a, 71b.
3 by slightly inserting the shaft cores 5 ′, 6 ′ into reference lines L1, L in plan view.
2, the outer peripheral portion of the curving belt 1 which rotates as described above is turned outward by the contact force between the pinch rollers 5 and 6 while being inclined in a predetermined direction. (FIGS. 4 and 5B).

As shown in FIG. 5B (in plan view), the pinch roller 5 pivotally supported by the forward arm 71a is
The shaft core 5 'is supported in a state where the shaft core 5' is inclined by α ゜ with respect to the reference lines L1 and L2. In addition, the inclination direction of the axis 5 ′ of the pinch roller 5 is a direction in which the tip of the support shaft 5 a facing the inside of the swivel advances toward the end of the conveyor, and in the case of the present embodiment, the inclination angle α ゜Is set to 7.5 °.

Further, as shown in FIG. 5B (in plan view), the pinch roller 6 pivotally supported by the return arm 71b has an axis 6 ′ of α with respect to the reference lines L1 and L2. It is pivotally supported only by ゜. In addition, the inclination direction of the shaft core 6 ′ of the pinch roller 6 is a direction in which the tip of the support shaft 6 a facing the inside of the swivel advances toward the conveyor start end,
6. The inclination angle α ゜ is set to 7. as in the case of the pinch roller 5 on the outward path.
It is set to 5. That is, the pinch rollers 5 and 6 always incline in opposite directions with respect to the reference lines L1 and L2.

Note that the above-mentioned two rotating arms 71a, 71b
Are formed in exactly the same shape, and the return arm 7
1b, the shaft core 6 'of the pinch roller 6 is turned in the reverse direction by using the rear side facing the front side (inverted state), contrary to the mounted state of the rotation arm 71a on the outward path side. It is configured to incline. As described above, by sharing the components of the two rotating arms 71a and 71b, the number of components can be reduced, which can contribute to a reduction in manufacturing cost.

According to the curved belt conveyor A configured as described above, since the base 8 is supported in a cantilever state, the pinch rollers 5 and 6 of the both belt clamping units b1 and b2 are manually retracted, and the curved belt is conveyed. By releasing the pinching of the outer peripheral portion (FIG. 7), both rollers 2a, 2
The curve belt 1 attached between the members b can be easily pulled out from the base 8 and the conveyor body a (FIG. 8). Further, the curved belt 1 removed by the reverse procedure can be mounted again.

Next, FIG. 5A, FIG. 5B and FIG.
a, in a state where the curve belt 1 is driven to rotate based on FIG.
The mechanical balance acting on each part of will be described. The curved belt conveyor A configured as described above rotates the middle roller 4 of both the belt holding units b1 and b2,
The forward side of the curve belt 1 that contacts the upper periphery of the middle roller 4 moves from the start of the conveyor to the end of the conveyor, and the return side of the curve belt 1 that contacts the lower periphery of the middle roller 4 moves from the end of the conveyor to the start of the conveyor. , And as a result, the curved belt 1 spanned between the rollers 2a and 2b rotates in the normal rotation direction (FIGS. 5-a and 5-b).

In FIG. 6A, when the curve belt 1 rotates in the normal rotation direction by the rotation of the middle roller 4, the forward pinch roller 5 that contacts the curve belt 1 and rotates following the shaft center is rotated by the shaft center. By giving the inclination angle α ゜ to 5 ′, a contact force F4 that pushes the outer peripheral portion of the curved belt 1 toward the outside of the turn is generated. In addition, the driving force F1 of the middle roller 4 acting in the tangential direction of the curved belt 1 is applied to the contact force F4, and acts as a resultant force F5. This resultant force F5
Rotates the curve belt 1 in the forward direction,
Force F6 for pulling the outer periphery of the curved belt 1 toward the outside of the turn
Act as

The curve belt 1 is rotated by the driving force F1, but at the same time, a force F2 is exerted so as to move to the inside of the turn to escape, so that the curve belt 1 moves toward the resultant force F3 of F1 and F2. Try to proceed. Incidentally, advancing in the direction of the resultant force F3 means a meandering of the curved belt 1, and the rotation of the conveyor is not smoothly performed, and the life of the belt is shortened. Therefore, the force F2 which tends to move the curve belt 1 toward the inside of the turn on the outward path is received by the urging force F6 of the pinch roller 5, thereby preventing the curve belt 1 from shifting toward the inside of the turn.

On the other hand, as shown in FIG. 6-b, the pinch roller 6 on the return path that rotates following the curve belt 1 in contact with the normally rotating curve belt 1 has an inclination angle α ゜ applied to its axis 6 ′. As a result, a contact force F4 'for pushing the outer peripheral portion of the curved belt 1 outward is generated. The driving force F of the middle roller 4 acting in the tangential direction of the curve belt 1
1 'is added and acts as a resultant force F5'. This resultant force F
5 ′ acts as a force F6 ′ for rotating the curve belt 1 in the normal rotation direction and for pulling the outer peripheral portion of the curve belt 1 outward in the turning direction.

Thus, the force F2 'for moving the return side of the curve belt 1 toward the inside of the turning is applied to the pinch roller 6
Is received by the urging force F6 ′. That is, the curve belt 1 prevents the curve belt 1 from deviating toward the inside of the turn due to the force of F2 and F2 'that urges the curve belt 1 toward the turning outer circumference on the outward path and the return path. are doing.

Therefore, the curved belt 1 receives the rotational driving force by the two locations on the outer peripheral portion where the two belt clamping units b1 and b2 are installed, and exerts a force urged outward in the turning direction. .

As the inclination angle α ゜ of the pinch rollers 5 and 6 is increased, the force F for pulling the outer peripheral portion of the curved belt 1 outward is increased.
6, F6 ′ can be increased, but in order to maintain a stable running state, F2 ≦ F6, F2 ′ ≦ F
It is sufficient to maintain the relationship of 6 ′, and no good effect can be expected even if it increases more than necessary. The applicant has repeatedly performed a number of tests. As a result, it was concluded that the inclination angle α ゜ of the pinch rollers 5, 6 included in the belt holding units b 1, b 2 was particularly good in the range of 5 ° to 10 °. However, the inclination angle α ゜ of the pinch rollers 5 and 6 is
The value is not limited to the above value, and may be set any number of times as long as an effect can be expected.

In the case of the curved belt conveyor A of the present embodiment, the two belt clamping units b1 and b2 are arranged from the turning center O of the curved belt 1 to the belt clamping units b1 on the outer periphery of the curved belt 1 in plan view. The angle between the reference lines L1 and L2 extending toward the installation position of b2 is 90.
It is installed at the position indicated by ゜. However, the installation interval between the two belt clamping units b1 and b2 is not limited to the above setting, and may be arbitrarily changed.

Next, the curved belt conveyor A2 shown in FIGS. 9 to 11 will be described. The curve belt conveyor A2 has the same configuration as the curve belt conveyor A described above, but is characterized in that a tip end of a center pin 9 ″ protruding from the center of the curve belt 1 is supported by a pin support member 10. And

As shown in FIG. 10, the center pin 9 ″ rotatably supports a substantially hemispherical head 97 via a bearing 96 at the tip of a support shaft 95, and the head 97. The insertion shaft 98 is configured to protrude from the shaft core portion at the tip of.
The center pin 9 ″ is inserted into the base end of the support shaft 95 at the center side end of the connection member 8c at the center of the base 8 and screwed, so that the center pin 9 of the curve belt conveyor A described above is screwed.
In the same manner as described above, the small interval e provided between the rollers 2a and 2b
It is mounted and supported so as to protrude horizontally toward the central part of the.

The insertion shaft 98 projecting from the tip of the center pin 9 '' is inserted from the inside into the insertion hole 1a at the center of the curve belt 1 mounted between the rollers 2a and 2b. It protrudes outward from the hole 1a. At this time, the substantially hemispherical head 97 comes into contact with the periphery of the insertion hole 1a at the center of the curved belt 1 from the inner side, and the periphery of the insertion hole 1a is maintained to be substantially the same as the outer diameter of the rollers 2a and 2b. It is devised so as not to cause wrinkles around the central portion of the curved belt 1 that is driven to rotate.

As described above, the insertion hole 1a of the curved belt 1
The insertion shaft 98 of the center pin 9 ″ projecting outward from the shaft is rotatably supported by a pin support 10 (FIG. 1).
0). The pin supporting member 10 is vertically attached and supported by bolts 11 in a state where the pin supporting member 10 is superimposed on a supporting portion a2 which stands vertically from the center of the upper surface of the leg portion a1 of the conveyor body a.
A substantially cylindrical bearing mounting portion 12 is integrally formed on the upper portion of the pin support member 10, and a bearing 13 is provided inside the bearing mounting portion 12. And is rotatably supported.

That is, by supporting the center pin 9 ″ provided at the center portion of the base 8 by the pin supporting member 10 as described above, the base 8
The base board 1 and b2 ′ and the center pin 9 ″ support the base end side and the front end side with the unit pins b1 ′ and b2 ′, so that the supporting structure is advantageous in strength. Thereby, the base 8 can be reliably supported in a stable state. As a result, even when the curved belt conveyor is enlarged, it is possible to reliably prevent the base supporting the curved belt from being deformed or vibrated so as to hang down due to the load of the conveyed object.

Further, the base 8 of the curved belt conveyor A2 becomes cantilevered similarly to the above-mentioned curved belt conveyor A just by removing the pin supporting member 10, so that
Similar to the above-described curved belt A, the curved belt 1 can be pulled out from the center side and easily removed (FIG. 1).
1).

Next, the curved belt conveyor A3 shown in FIGS. 12 and 13 will be described. The curve belt conveyor A3 has the same configuration as the above-described curve belt conveyor A, but includes three belt clamping units b.
3, 3, and 4 are provided at intervals on the outer peripheral portion of the curved belt 1.

The belt clamping units b3 to b5 rotate the curved belt 1 and urge the outer peripheral edge of the curved belt 1 toward the outside of the turn so that the curved belt 1 is driven and rotated. 1 to prevent it from shifting toward the inner circumference side of the turn, and to have a moderate tension, as in the case of the belt holding units b1 and b2 of the curved belt conveyor A described above, It is composed of two pinch rollers 5 and 6.

In the curved belt conveyor A3, the driving mechanism c is provided only for the belt holding unit b4 installed at the center of the three belt holding units b3 to b5.
And a belt clamping unit b installed on both sides of the
3 and b5, the middle roller 4 and the pinch rollers 5 and 6 are configured to rotate following the rotation drive of the curve belt 1 without providing the drive mechanism c (FIG. 13).
In addition, as described above, both belt clamping units b3, b
Reference numerals 4 and b5 are configured in exactly the same manner as the two belt clamping units b1 and b2 of the curved belt conveyor A described above.
Therefore, the description of the structure is omitted.

In the curved belt conveyor A3, since the drive mechanism c is provided only in the center belt holding unit b4, the middle roller 4 of the belt holding unit b4 is driven to rotate. The curve belt 1 is driven to rotate. The mechanical balance acting on the belt holding unit b4 is the same as that of the belt holding units b1 and b2 of the curve belt A (FIG. 6).
-A, which is exactly the same as FIG. Further, since the belt holding units b3 and b5 installed on both sides of the belt holding unit b4 do not have the driving mechanism c, the middle roller 4 and the two pinch rollers 5 and 6 rotate as described above. It rotates so as to follow the curved belt 1.

On the other hand, the urging force for pulling the curved belt 1 toward the outside of the turn is the above-mentioned belt clamping units b3, b
4 and 5 work in the same way and provide sufficient tension to prevent the curve belt 1 from shifting or wrinkling due to the contact force between the pinch rollers 5 and 6.

In the case where the driving mechanism c is provided only at one of the three belt clamping units b3, b4, and b5 as described above, it is possible to apply sufficient driving rotational force and tension to the curved belt 1. At the same time, since only one drive mechanism c is required, manufacturing costs can be reduced.

In the case of the curved belt conveyor A3 of the above embodiment, the angle α2 between the reference lines L3 and L4 and the angle between the reference lines L4 and L5 are set to 45 ° (FIG. 12). ). However, the angle described above is not limited to 45 °, and may be arbitrarily changed.

Each of the above-described curve belt conveyors A to A
A3 has been described as driving the curve belt 1 forward from the roller 2a side end toward the roller 2b side end. However, as shown in FIG. 14, the above-mentioned conveyors A to A3 oppose the pivots of the rotating arms 71a and 71b which support the pinch rollers 5 and 6 with the axis 4 'of the middle roller 4 interposed therebetween. The curved belt 1 is reversely driven by setting the inclination of the two pinch rollers 5 and 6 in a plan view in the opposite direction while rotating the middle roller 4 serving as a driving roller in the reverse direction. It is possible.

According to the gist of the present invention, any number of belt clamping units may be provided as long as they are plural. In the curve belt conveyors A to A3 of the above embodiment, two or three belt clamping units b1 to b5 are installed,
The number of belt holding units to be installed is not limited to two or three as in the above embodiment, but four or more belt holding units may be installed. Even in such a case, the drive mechanism may be installed on at least one of the belt clamping units, and the drive mechanism may be installed on two or more or all units.

[0080]

Since the present invention is constructed as described above, it has the following effects. 1.1 With a circular curved belt folded in two, a large number of small rollers are attached between both rollers or between knife edges, which are configured in parallel, and an insertion drilled at the center of the curved belt By inserting the center pin through the hole from the inside of the belt, 1
Since the transport path is a semi-circular transport path that rotates by 80 ° in plan view, the starting and ending edge portions of the 180 ° -rotating curve belt conveyor can be reduced in diameter, and the connection end of another linear conveyor can be formed. The gap generated between the parts can be minimized, which is extremely advantageous for the transfer of a conveyed object. 1.2 During the rotation of the curve belt, the small rollers arranged coaxially and freely rotate independently and independently, so that the rollers between the inner and outer sides of the curve belt installed between both rollers The resulting difference in peripheral speed is absorbed by the respective small rollers rotating at the respective peripheral speeds, thereby contributing to smooth rotation of the curved belt. 1.3 The curved belt is constructed as a circular and smooth belt, the belt is mounted in a folded state, and the center pin is inserted through the insertion hole formed in the center, so that the plane rotates 180 °. Since it constitutes a semi-circular transport trajectory, it can be manufactured as a smooth one with no protrusions such as beads protruding on the surface of the curved belt, and a strong reinforcing material is installed inside the belt. There is no need to do it. Furthermore, the conventional curve belt had to be processed into an endless shape by welding the ends of the belt to produce an endless belt, but the curve belt used in the present invention cuts the belt material into a circle, It can be manufactured simply and at low cost only by forming an insertion hole at the center. 1.4 The circular curve belt is folded in two, a center pin is inserted into an insertion hole formed in the center to guide the rotation of the curve belt, and the driving force of the plurality of belt clamping units is used for 180 degrees. (4) The rotation drive of the curved semicircular curved belt in plan view and the guidance of the rotation of the curved belt can be reliably performed. Therefore, when compared with a conventional curved belt conveyor in which the outer peripheral edge of the curved belt is held by a holding mechanism such as a bead or a guide roller, a complicated mechanism for holding the curved belt is eliminated. In addition, the mechanism for holding and driving the semicircular curved belt without slack can be extremely simplified, and the curved belt can be reliably driven to rotate without generating large noise. 1.5 Since the center pin of the curved belt in the mounted state only has a central pin protruding, the substantially entire width of the curved belt can be efficiently used as a transport path. 1.6 The curved belt conveyor of the present application is provided with a plurality of belt clamping units, and is configured to urge the outer peripheral portion of the curved belt outward at the installation position of each of the belt clamping units, respectively, toward the turning outside. ,
The outer peripheral portion of the curved belt can be evenly biased outward in a wide range in the turning direction. The wide and evenly acting urging force opposes the shift force acting on the curving belt being driven in rotation, and can apply uniform and sufficient tension to the semicircular curved belt in plan view. . As a result, it is possible to greatly increase the width of the curve belt and to increase the size of the curve belt conveyor, and even when a wide curve belt is provided, the swelling of the conveyance surface, displacement to the center of rotation, generation of wrinkles, etc. It is possible to drive smoothly without any trouble.

The curved belt conveyor according to claim 2 is
The outer peripheral portion of the base that supports the outward road surface of the curve belt from the back side is supported by a conveyor body member on the outer peripheral edge side of the curve belt, and the base is supported in a cantilever manner. The supported semicircular curved belt in a plan view can be pulled out from the center side and removed very easily from the base and the conveyor body by removing the clamping by the belt clamping units that clamp the outer peripheral portion of the belt. Further, the curve belt can be mounted again in the reverse process to the above-described process. Therefore, by simply attaching and detaching the holding portion of each belt holding unit on the outer periphery of the curved belt, the removing work and the attaching work of the curved belt can be performed extremely easily and in a short time. For hygiene management, the time and labor for cleaning belts and airframes that are regularly performed can be greatly reduced, which can contribute to sanitization of equipment and safe operation.

The curved belt conveyor according to claim 3 is
2. The curved belt conveyor according to claim 1, wherein an outer peripheral portion of a base for supporting a forward path surface of the curved belt from the back side of the belt is supported by a conveyor body member on an outer peripheral edge side of the curved belt, and a center supported by the base. The protruding end of the pin is rotatably supported by a pin supporting member which is detachably attached to and supported by a member on the belt center side of the conveyor body. Therefore, after removing the pin supporting material supporting the protruding end of the center pin from the main body member,
By simply removing the clamping portion of each belt clamping unit on the outer periphery of the curve belt, the attached curved belt can be pulled out to the center side and easily removed from the base and the conveyor body. Can be returned to the original mounted state. As a result, even when the curved belt conveyor is enlarged, it is possible to reliably prevent the base supporting the curved belt from being deformed or vibrated so as to hang down due to the load of the conveyed object. In addition, for maintenance inspection and hygiene management,
The time and effort of cleaning belts and airframes that are regularly performed can be greatly reduced, which can contribute to sanitization of equipment and safe operation.

[Brief description of the drawings]

1A is a plan view showing a 180 ° curve belt conveyor embodying the present invention, and FIG. 1B is an enlarged plan view showing a center pin portion.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a perspective view showing a belt holding unit.

FIG. 5 shows a driving state during forward rotation driving,
(A) is a front view showing a driving roller and a pinch roller unit,
(B) is the same top view.

FIGS. 6A and 6B are explanatory diagrams showing the mechanical balance of each part at the time of forward rotation driving, where FIG. 6A shows a forward path side and FIG.

FIG. 7 is a front view of the middle roller portion of the belt holding unit showing a state where the pinch roller is separated from the middle roller.

FIG. 8 is a perspective view showing a state where a curved belt is pulled out from a base and a conveyor body.

FIG. 9 is a plan view showing a double-supported curved belt conveyor in which a center pin is supported by a support member.

FIG. 10 is a sectional view taken along line XX in FIG. 9;

FIG. 11 is a perspective view showing a state where the curve belt of the curve belt conveyor is pulled out from the base and the conveyor body.

FIG. 12 is a plan view showing a curved belt conveyor in which three belt clamping units are arranged along the outer periphery of the curved belt.

FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 12;

FIG. 14 is a perspective view showing the belt holding unit in a reverse use state.

FIG. 15 shows a conventional curve belt conveyor,
(A) is a plan view, (b) is a cross-sectional front view.

16A and 16B show a conventional bead-type curved belt conveyor, where FIG. 16A is a plan view and FIG. 16B is a longitudinal sectional view of a bead and a guide roller portion.

[Explanation of symbols]

 A to A3: Curved belt conveyor a: Conveyor body b1 to b5: Belt clamping unit c: Drive mechanism L1 to L5: Reference line 1: Curved belt 1a: Insertion hole 2a: Conveyor start end side roller 2b: Conveyor end side roller 4 ... Middle roller 4 '... Shaft core 4a ... Support shaft 5 ... Pinch roller (forward path) 5' ... Shaft core 5a ... Support shaft 6 ... Pinch roller (return path side) 6 '... Shaft core 6a ... Support shaft 8 ... Base 9, 9 "... Center pin 10 ... Pin support

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-323908 (JP, A) JP-A-3-264415 (JP, A) JP-A-6-340315 (JP, A) 41359 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B65G 15/00-15/28 B65G 15/60-15/64 B65G 39/00-39/20 B65G 21/16 -21/18

Claims (3)

(57) [Claims] 1. A pair of rollers formed by arranging a number of small rollers formed in a substantially short cylindrical shape on the same axis and forming an outer shape substantially in the shape of a long axis, and allowing each of the small rollers to freely rotate individually. The two rollers are arranged side by side on a single shaft, and a small space is provided between the ends of the two rollers facing each other, and the one shaft in a plan view is provided at the center of the small space. A center pin protruding perpendicular to the core is disposed, and a circular curved belt is folded between two rollers, and is mounted between the rollers or between the knife edges. By inserting the center pin from the inside of the belt into the insertion hole formed in the center part, a semicircular transport path that makes a 180 ° turn in plan view around the center pin is formed, and the forward path surface of the curve belt is formed. Flat base While supporting from the back side of the belt, the center pin and both rollers are supported by the base, and a plurality of belt clamping units are disposed along the outer peripheral portion of the curved belt. Inserted and installed between the outward and return paths on the outer periphery of the curved belt, and rotated with the axis aligned with the reference line extending from the turning center of the curved belt toward the outer periphery of the belt in plan view. A middle roller freely supported by a shaft, a pinch roller installed on the outward surface of the outer peripheral portion of the curved belt and pressed against the outer peripheral surface of the intermediate roller with the curved belt interposed therebetween, and a return surface of the outer peripheral portion of the curved belt. A pinch roller installed below and pressing the outer peripheral surface of the middle roller with the curved belt interposed therebetween, and A drive mechanism is connected to at least one middle roller to make the middle roller freely rotatable, and a curve belt sandwiched between the outer peripheral surface of the middle roller and both the forward and backward pinch rollers can be driven to rotate. And the pivots of both the pinch rollers on the outward path and the return path of each of the belt clamping units are rotatably supported in a state of being inclined in a predetermined direction with respect to a reference line in plan view. A curved belt conveyor in which the outer peripheral portion of the curved belt is urged toward the outside of the turn by the contact at the time of rotation. 2. The curved belt conveyor according to claim 1, wherein the outer peripheral portion of the base is supported by a conveyor body member on the outer peripheral side of the curved belt, and the base is supported in a cantilever manner. 3. An outer peripheral portion of the base is supported by a conveyor main body member on an outer peripheral edge side of the curved belt, and a protruding end of a center pin supported by the base is moved relative to a belt central side member of the conveyor main body. 2. A rotatably supported pin supporting member which is detachably mounted on and supported by a motor.
The described curve belt conveyor.