WO2013008820A1

WO2013008820A1 - Belt conveyor operating method, belt conveyor operating device, control method for transport device, and transport device

Info

Publication number: WO2013008820A1
Application number: PCT/JP2012/067603
Authority: WO
Inventors: 晶登美; 哲也竹川; 丈弘岡本; 大野　泰嗣
Original assignee: 新東工業株式会社
Priority date: 2011-07-12
Filing date: 2012-07-10
Publication date: 2013-01-17
Also published as: JPWO2013008820A1; CN103476689A; CN103476689B; JP6098511B2

Abstract

In order to provide a transport device capable of pitch-feeding heavy transport objects reliably and with high precision, a transport device (100) is equipped with: a conveyor belt (4) on which n (where n is an integer greater than or equal to 2) transport objects (7) are loaded; a motor (6) that drives the conveyor belt (4); and a control unit (30) that controls the motor (6) such that when the transport distance of the transport objects (7) from an intersection part (C1) to an intersection part (C2) on the conveyor belt (4) is LT, the amount Lp for one pitch feed of the conveyor belt (4) is the amount calculated with the Equation (1). LP = LT/(n-1) . . . (1)

Description

Belt conveyor driving method, belt conveyor driving device, and conveying device control method and conveying device

The present invention relates to an operation method of a belt conveyor and an operation device of the belt conveyor for conveying a conveyed product by pitch feeding, a control method of the conveyance device, and a conveyance device.

Patent Document 1 discloses a transport device that transports a plurality of transported objects by pitch feeding. The said conveying apparatus is provided with the conveyor which conveys the mounted several conveyed product in a fixed direction, and the several stopper arrange | positioned at fixed intervals along the conveying direction of a conveyor. In the said conveying apparatus, a conveyed product can be reliably and highly accurately conveyed by pitch feeding by driving a stopper between a protrusion position and a drawing-in position, driving a conveyor.

Japanese Patent Laid-Open No. 2001-213515

However, since the transport device stops the movement of the transported object with the stopper and pitches the transported object, the load applied to the stopper increases when the transported object is a heavy object (for example, a mold). The transfer device could not be applied.

Therefore, in the present technical field, there is a demand for a belt conveyor operation method, a belt conveyor operation device, a conveyance device control method, and a conveyance device that can reliably and highly accurately feed the conveyed material even if it is heavy. .

An operation method of a belt conveyor according to one aspect of the present invention is an operation method of a belt conveyor that is stretched between a head pulley and a tail pulley to pitch-feed a conveyed product. The target position to be stopped for each conveyance cycle is controlled over the entire length of the belt conveyor by an encoder that detects the rotation angle of the tail pulley rotation shaft, and the pitch feed amount is controlled.

The operation method of the belt conveyor according to one aspect of the present invention selects an arbitrary transported object, and always controls the target position at which the transported object stops for each transport cycle by the encoder count from the loading position to the target position. Then, the timing at which the selected transported object is carried out, or the control to change the transported object that is carried in after the control arbitrarily determined cycle to the transported object that controls the next stop position is repeated.

A method for controlling a transport apparatus according to one aspect of the present invention is a method for controlling a transport apparatus including a conveyor on which n (n is an integer of 2 or more) transported objects and drive means for driving the conveyor. When the transport distance of the transported object from the carry-in part to the carry-out part in the conveyor is LT, driving is performed so that the single pitch feed amount Lp of the conveyor is the size calculated by the expression (1). Controlling the means.
Lp = LT / (n-1) (1)

In the control method for the transport device according to one aspect of the present invention, the pitch feed amount Lp for one time of the conveyor is calculated based on the transport distance LT and the number n of transported objects. Since the magnitude of the conveyance distance LT is a fixed value that does not vary, the calculated pitch feed amount Lp does not include the positional deviation amount of the conveyed product. Therefore, the pitch feed amount Lp becomes accurate. Therefore, even if the conveyed product is heavy, the pitch can be reliably and accurately fed.

The transport device further includes a detection unit that detects the movement of the conveyor at constant distances, and in the step of controlling the drive unit, when the count number by the detection unit when the conveyor moves the transport distance LT is CT, The drive means may be controlled so that the count number Cp in the detection means at the time of one pitch feed of the conveyor becomes the magnitude calculated by the equation (2).
Cp = CT / (n-1) (2)
In this case, assuming that the amount of movement of the conveyor per count is α, the pitch feed amount Lp and the transport distance LT are expressed by Expression (3) and Expression (4), respectively.
Lp = α × Cp (3)
LT = α × CT (4)
When Expression (3) and Expression (4) are substituted into Expression (2), Expression (1) is obtained. That is, the pitch feed amount Lp can be set only by grasping in advance the moving amount α of the conveyor per count and the count number CT by the detecting means.

The step of controlling the driving means acquires the position of one of the conveyed objects on the conveyor based on the count number by the detecting means, and the acquired position of the one conveyed object and the stop position target value. When the two do not coincide with each other, the driving means may be controlled so as to eliminate the deviation amount and the conveyor may be moved forward or backward. In this case, even if a deviation occurs between the stop position of the conveyed product and the stop position target value, the deviation amount is eliminated. Therefore, the further improvement of the stop accuracy of a conveyed product is achieved.

The control means may re-select one transported object from the transported objects on the conveyor every predetermined cycle. In this case, since the deviation amount is eliminated every predetermined period, the accuracy of stopping the conveyed product can be further improved.

The conveyor may include a conveyor belt and a pair of pulleys on which the conveyor belt is bridged, and the detection unit may detect the amount of rotation of the pulleys at a fixed angle.

A belt conveyor driving device according to another aspect of the present invention is a belt conveyor driving device that is stretched between a head pulley and a tail pulley and pitches a conveyed product, and intermittently rotates the head pulley. A motor, an encoder that detects the rotation angle of the tail pulley rotation shaft, and a control device that controls the target position at which the selected conveyance object stops for each conveyance cycle by the count number of the encoder.

A transport apparatus according to another aspect of the present invention includes a conveyor on which n (n is an integer of 2 or more) transported objects, drive means for driving the conveyor, and a carry-in section to a carry-out section in the conveyor. And a control means for controlling the drive means so that the pitch feed amount Lp of the conveyor once becomes the size calculated by the equation (5) when the transport distance of the transported object is LT.
Lp = LT / (n-1) (5)

In the transport apparatus according to another aspect of the present invention, the pitch feed amount Lp for one time of the conveyor is calculated based on the transport distance LT and the number n of transported objects. Since the magnitude of the conveyance distance LT is a fixed value that does not vary, the calculated pitch feed amount Lp does not include the positional deviation amount of the conveyed product. Therefore, the pitch feed amount Lp becomes accurate. Therefore, even if the conveyed product is heavy, the pitch can be reliably and accurately fed.

Detection means for detecting the movement of the conveyor at fixed distances is further provided, and the control means performs one pitch feed of the conveyor when the count number by the detection means when the conveyor moves the transport distance LT is CT. The driving means may be controlled so that the count number Cp in the detection means at that time becomes the size calculated by the equation (6).
Cp = CT / (n-1) (6)
In this case, assuming that the amount of movement of the conveyor per count is α, the pitch feed amount Lp and the transport distance LT are expressed by Expression (7) and Expression (8), respectively.
Lp = α × Cp (7)
LT = α × CT (8)
When Expression (7) and Expression (8) are substituted into Expression (6), Expression (5) is obtained. That is, the pitch feed amount Lp can be set only by grasping in advance the moving amount α of the conveyor per count and the count number CT by the detecting means.

The control means acquires the position of one of the conveyed objects on the conveyor based on the number of counts by the detecting means, compares the acquired position of the one conveyed object with the stop position target value, If they do not match, the conveyor may be moved forward or backward by controlling the driving means so as to eliminate the deviation amount. In this case, even if a deviation occurs between the stop position of the conveyed product and the stop position target value, the deviation amount is eliminated. Therefore, the further improvement of the stop accuracy of a conveyed product is achieved.

According to various aspects of the present invention, even if the transported object is a heavy object, it can be reliably and accurately pitch-fed.

FIG. 1 is a top view of the transport device. FIG. 2 is a side view of the transport device. FIG. 3 is a top view showing the carry-out portion. FIG. 4A is a side view showing the carry-out part, and FIG. 4B is a front view showing the carry-out part. FIG. 5A is a side view showing the vicinity of the encoder, and FIG. 5B is a front view showing the vicinity of the encoder. FIG. 6 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 7 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 8 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 9 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 10 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 11 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 12 is a diagram illustrating a state in which the conveyed product is conveyed. FIG. 13 is a side view illustrating another example of the transport device.

The conveyance device 100 according to the present embodiment will be described with reference to the drawings. In the description, the same reference numerals are used for the same elements or elements having the same function, and a duplicate description is omitted.

As shown in FIGS. 1 and 2, the transport device 100 includes a conveyor 1, a carry-in device 8, a carry-out device 10, an encoder 14, and a control unit 30. The conveyor 1 includes a conveyor belt 4, a head pulley 2, a tail pulley 3, a support member 1 a that supports the head pulley 2 and the tail pulley 3, a plurality of driven rollers 1 b, and a motor 6.

The conveyor belt 4 is an endless belt stretched over the head pulley 2 and the tail pulley 3. On the upper surface of the upper portion of the conveyor belt 4, n (n is an integer of 2 or more) conveyed items 7 are placed.

The head pulley 2 is rotatably attached to the support member 1a via a rotating shaft 2a as shown in FIG. As shown in FIG. 2, the rotation of the motor 6 is transmitted to the head pulley 2 through the chain 5. Thereby, the rotation of the motor 6 is transmitted in the order of the chain 5, the head pulley 2, and the conveyor belt 4, and the conveyed product placed on the conveyor belt 4 moves along the extending direction of the conveyor belt 4. At this time, the motor 6 is controlled by the control unit 30 so as to pitch-feed the conveyor belt 4 at a predetermined feed amount in order to keep the interval of the conveyed product 7 on the conveyor belt 4 constant.

As shown in FIG. 4, the tail pulley 3 is rotatably attached to the support member 1 a via the rotation shaft 13. The tail pulley 3 is a driven pulley that rotates as the conveyor belt 4 rotates. As shown in FIG. 1, the plurality of driven rollers 1b are disposed between the head pulley 2 and the tail pulley 3, and are rotatably attached to the support member 1a.

As shown in FIGS. 1 and 2, the carry-in device 8 is arranged on the side of the conveyor 1 between the head pulley 2 and the tail pulley 3 and in the vicinity of the tail pulley 3. The carry-in device 8 has a carry-in path 8 a and a push plate 9. The carry-in path 8a is orthogonal to the conveyor 1 when viewed from above. The extrusion plate 9 operates in accordance with a signal output from the control unit 30 to push the conveyed product 7 on the carry-in path 8a onto the conveyor belt 4.

As shown in FIGS. 1 and 2, the carry-out device 10 is disposed between the head pulley 2 and the tail pulley 3 and in the vicinity of the head pulley 2 on the side of the conveyor 1. The carry-out device 10 includes a carry-out path 10 a and an extrusion plate 11. The carry-out path 10a is orthogonal to the conveyor 1 when viewed from above. The extrusion plate 11 operates in accordance with a signal output from the control unit 30 to push the conveyed product 7 on the conveyor belt 4 to the carry-out path 10a. A fixed guide 12 is attached to the unloading path 10a in order to prevent the conveyed object 7 from protruding from the unloading path 10a when the unloading object 7 is pushed out to the unloading path 10a.

The encoder 14 is attached to the rotating shaft 13 of the tail pulley 3 as shown in FIGS. 1, 2, 4 and 5. The encoder 14 is a rotary encoder that outputs a pulse each time the tail pulley 3 rotates by a predetermined angle. The pulse output from the encoder 14 is transmitted to the control unit 30.

The control unit 30 is connected to the encoder 14, the carry-in device 8, the carry-out device 10 and the motor 6 as shown in FIG. 2. The control unit 30 detects the amount of rotation of the tail pulley 3 by counting the pulses input from the encoder 14. The control unit 30 outputs signals to the carry-in device 8, the carry-out device 10, and the motor 6 according to the count number, and controls operations of the push-out plate 9 of the carry-in device 8, the push-out plate 11 of the carry-out device 10, and the motor 6.

Next, the control of the carry-in device 8, the carry-out device 10, and the motor 6 by the control unit 30 will be specifically described. Here, there are n conveyed items 7 from the intersection C1 (see FIG. 1) between the carry-in path 8a and the conveyor belt 4 to the intersection C2 (see FIG. 1) between the carry-out path 10a and the conveyor belt 4. Is considered to be placed on the conveyor belt 4 at regular intervals. In addition, since the number n by which the conveyed product 7 is mounted on the conveyor belt 4 is normally determined at the time of design of the conveying apparatus 100, n is a fixed value.

Each conveyed product 7 is sequentially pitched by the conveyor belt 4 and stops n-1 times from the carry-in position of the intersection C1 to the carry-out position of the intersection C2. That is, assuming that there is no positional deviation during conveyance, m (m is an integer from 1 to (n−1)) stop position target value Lm of conveyance object 7 is expressed by equation (9), and n− The first stop position target value L (m−1) is the carry-out position.
Lm = m / (n−1) × LT (9)
Here, LT is the conveyance distance of the conveyed product 7 from the intersection C1 to the intersection C2 in the conveyor belt 4, and is a fixed value determined when the conveyance device 100 is designed.

First, the control unit 30 controls the carry-out device 10 to push the conveyed product 7 located at the intersection C2 (carry-out position) to the carry-out path 10a with the pusher plate 11. As a result, there are n−1 conveyed items 7 on the conveyor belt 4 from the intersection C1 (carry-in position) to a position just before the intersection C2 (n-2th stop position). .

Subsequently, the control unit 30 controls the motor 6 so as to pitch-feed the conveyor belt 4 with a single pitch feed amount Lp. Thereby, on the conveyor belt 4, from the primary position of the intersection C1 (first stop position target value) to the intersection C2 (unloading position, that is, the (n-1) th stop position target value), There are n-1 conveyed items 7.

Subsequently, the control unit 30 controls the carry-in device 8 to push the conveyed product 7 positioned in the carry-in path 8a toward the intersection C1 by the push plate 9. As a result, n conveyed items 7 exist on the conveyor belt 4 from the intersection C1 (carry-in position) to the intersection C2 (carry-out position, that is, the (n-1) th stop position target value). In the conveying apparatus 100, the above operation is repeated, and the conveyed product 7 is sequentially pitched on the conveyor belt 4.

FIG. 10 shows a state in which one of the conveyed items 7 on the conveyor belt 4 is located at the second stop position target value L2 = 2 / (n−1) × LT. FIG. 11 shows a state where one of the conveyed items 7 on the conveyor belt 4 is positioned at the tenth stop position target value L10 = 10 / (n−1) × LT. FIG. 12 shows that one of the conveyed objects 7a on the conveyor belt 4 is n−1th stop position target value (unloading position) L (n−1) = (n−1) / (n−1). ) It is located at × LT, and shows a state where the conveyed product 7b of the next cycle is located at the carry-in position.

Here, the pitch feed amount Lp will be described in more detail. In the present embodiment, the control unit 30 controls the motor 6 so that the count number Cp by the encoder 14 at the time of one pitch feed of the conveyor belt 4 becomes the size calculated by the equation (10).
Cp = CT / (n-1) (10)
Here, CT is the number of counts by the encoder 14 when the conveyor belt 4 moves the transport distance LT, and is a measured value obtained by measuring in advance.

When the moving amount of the conveyor belt 4 per count of the encoder 14 is α, the pitch feed amount Lp and the transport distance LT are expressed by the equations (10) and (11), respectively.
Lp = α × Cp (11)
LT = α × CT (12)
When Expression (11) and Expression (12) are substituted into Expression (10), Expression (13) is obtained.
Lp = LT / (n-1) (13)
Therefore, the pitch feed amount Lp can be set only by grasping in advance the moving amount α of the conveyor per count and the count number CT by the detecting means. Thereby, in this embodiment, the control part 30 controls the motor 6 so that the pitch feed amount Lp becomes the magnitude | size calculated by Formula (10).

By the way, when conveying the conveyed product 7 by the conveyor 1, it is also conceivable to control the conveyor belt 4 using a timer. That is, it can be considered that the control unit 30 operates and stops the motor 6 at regular intervals (intermittent operation). However, the actual stop position of the conveyed product 7 may slightly deviate from the stop position target value due to a brake delay or the like. That is, the pitch feed amount Lp may not match the actual movement amounts (actual measurement values) Lx1, Lx2, Lx3,..., Lx (n−1) (see FIG. 6). In the case of timer control, once a positional deviation occurs, it is difficult to eliminate the deviation. Moreover, when the transported object 7 is unloaded in the direction orthogonal to the transport direction of the transported object 7 as in the present embodiment, a situation in which the transported object 7 cannot be unloaded may occur depending on the amount of deviation.

Specifically, when the positional deviation occurs and the conveyed product 7 does not reach the target carrying-out position, and the deviation amount Lz is not enough to be fed, the carrying amount is larger than the allowable positional deviation amount La (see FIG. 3). Sometimes the conveyed product 7 interferes with the fixed guide 12. In addition, when the displacement 7 occurs and the conveyed product 7 exceeds the target unloading position and the displacement amount Lz becomes larger than the excessive displacement allowance Lb (see FIG. 3), the extrusion plate is unloaded at the time of unloading. 11 extrudes two conveyed objects 7.

In order to prevent such a shift of the stop position, it is conceivable to control the conveyor belt 4 using an encoder. Specifically, the pitch feed amount Lp for feeding the transported object 7 positioned just before the unloading position to the unloading position is adjusted by the equation (14), and the transported object 7 is accurately stopped at the unloading position. It is possible.
Lp = LT−Ls (14)
Here, Ls indicates a transport distance when a certain transported object 7 is transported from the carry-in position to one position before the carry-out position, and is an actual measurement value obtained by the encoder.

A state of transporting the transported object 7 using the equation (14) will be specifically described with reference to FIGS. First, as shown in FIG. 7, the conveyed product 7 positioned immediately before the carry-out position is conveyed by one pitch. The pitch feed amount Lp at this time is Lp1 (Lp = Lp1). At the same time, the conveyed product 7 positioned at the carry-in position is conveyed by Lp1 (see FIG. 8).

Subsequently, as shown in FIG. 8, the conveyed product 7 positioned immediately before the unloading position is conveyed by one pitch. The pitch feed amount Lp at this time is Lp2 (Lp = Lp2). At the same time, the conveyed product 7 located at the carry-in position is conveyed by Lp2 (see FIG. 9). Thus, the conveyed product 7 located at the carry-in position is sequentially conveyed by the pitch feed amount Lp (Lp3, Lp4,..., Lp (n−1)) calculated by the equation (14).

According to the equation (14), the pitch feed amount Lp is calculated using Ls which is an actually measured value. Therefore, there may be a case where the value Ls and the actual transport distance of the transported object 7 are different due to the positional deviation of the transported object 7. Therefore, the pitch feed amount Lp may vary.

This variation does not naturally converge unless correction control is performed, and tends to diffuse. For this reason, when the conveyed product 7 is in an excessively fed state, the pitch feed amount Lp decreases each time conveyance of the conveyed product 7 is repeated, and a space for carrying the conveyed product 7 at the loading position cannot be secured. End up. On the other hand, when the conveyed product 7 is not fed, the pitch feed amount Lp increases each time the conveyed product 7 is repeatedly conveyed, and a predetermined number of conveyed items 7 cannot be placed on the conveyor belt 4. End up.

Therefore, in this embodiment, even when the transported object 7 is unloaded in a direction orthogonal to the transport direction of the transported object 7, the transport device is controlled so that the variation in the pitch feed amount Lp can be suppressed. Specifically, the control unit 30 acquires the position of one of the conveyed objects 7 on the conveyor belt 4 based on the count number of the encoder 14. Subsequently, the control unit 30 compares whether or not the acquired position of the one conveyed product 7 matches the stop position target value.

When the control unit 30 determines that they match as a result of the comparison, no particular control is performed. On the other hand, when the control unit 30 determines that they do not match as a result of the comparison, the control unit 30 controls the motor 6 so as to eliminate the shift amount. Specifically, when the position of one conveyed product 7 is advanced from the stop position target value, the control unit 30 controls the motor 6 to move the conveyor belt 4 backward. On the other hand, when the position of one conveyed product 7 is in front of the stop position target value, the control unit 30 controls the motor 6 to advance the conveyor belt 4.

In the present embodiment, the control unit 30 reselects one transported object 7 from the transported objects 7 on the conveyor belt 4 at predetermined intervals. For example, as shown in FIG. 12, when one conveyed product 7 a is unloaded from the unloading position, the conveyed item 7 b loaded into the loading position at the subsequent timing may be selected as a new single conveyed item 7. Good. Or you may select the new one conveyed product 7 from the conveyed product 7 on the conveyor belt 4 for every arbitrary time or distance periods.

In the present embodiment as described above, one pitch feed amount Lp of the conveyor is calculated based on the transport distance LT and the number n of transported objects. Since the magnitude of the transport distance LT is a fixed value that does not vary, the calculated pitch feed amount Lp does not include the positional deviation amount of the transported object 7. Therefore, the pitch feed amount Lp becomes accurate. Therefore, even if the transported object 7 is a heavy object, it can be reliably and accurately pitch-fed. Further, in the present embodiment, the load amount of the conveyed product 7 on the conveyor belt 4 is increased (the length of the conveyor belt 4 is extended), or the loading density of the conveyed product 7 is increased (the gap between the conveyed items 7 is increased). Even in the case of narrowing), the conveyed product 7 can be pitch-fed reliably and with high accuracy. Furthermore, in the present embodiment, even when it is difficult to detect the position of the conveyed product 7 because the shape of the conveyed product 7 is indefinite or the shape of the conveyed product 7 changes with the passage of time, The conveyed product 7 can be pitched reliably and with high accuracy.

In the present embodiment, the control unit 30 controls the motor 6 so that the count number Cp by the encoder 14 at the time of one pitch feed of the conveyor belt 4 becomes the size calculated by the equation (10). In this case, if the moving amount of the conveyor belt 4 per count of the encoder 14 is α, the pitch feed amount Lp and the transport distance LT are expressed by the equations (10) and (11), respectively. Substituting equation (12) into equation (10) yields equation (13). Therefore, in the present embodiment, the pitch feed amount Lp can be set only by grasping in advance the moving amount α of the conveyor per count and the count number CT by the detecting means.

In the present embodiment, the control unit 30 acquires the position of one of the conveyed objects 7 on the conveyor belt 4 based on the count number of the encoder 14. Then, when the acquired position of one conveyed product 7 is compared with the target stop position value and the two do not match, the control unit 30 controls the motor 6 so as to eliminate the deviation amount, and the conveyor belt 4 is moved. Move forward or backward. Therefore, even if a deviation occurs between the stop position of the conveyed product 7 and the stop position target value, the deviation amount is eliminated. As a result, the accuracy of stopping the conveyed product 7 can be further improved. Such control of the motor 6 by the control unit 30 is particularly suitable when the transported object 7 is unloaded in a direction different from the transport direction.

In this embodiment, one transported object 7 is selected again from the transported objects 7 on the conveyor belt 4 at predetermined intervals. For this reason, since the deviation amount is eliminated at every predetermined period, the accuracy of stopping the conveyed product 7 can be further improved.

As mentioned above, although embodiment of this invention was described in detail, this invention is not limited to above-described embodiment. For example, the encoder 14 may be attached to the head pulley 2.

Instead of the encoder 14 (rotary encoder), a detecting means that can detect the movement of the conveyor belt 4 at regular intervals may be used.

The conveyor belt 4 may be bent and / or inclined as shown in FIG.

DESCRIPTION OF SYMBOLS 1 ... Conveyor, 2 ... Head pulley, 3 ... Tail pulley, 4 ... Conveyor belt, 6 ... Motor, 7, 7a, 7b ... Conveyed material, 8 ... Carry-in device, 10 ... Carry-out device, 14 ... Encoder, 30 ... Control part, 100: Conveying device.

Claims

An operation method of a belt conveyor that is stretched between a head pulley and a tail pulley and pitches a conveyed product,
The belt conveyor is operated by controlling the target position at which the selected transported object stops in each transport cycle over the entire length of the belt conveyor by an encoder that detects the rotation angle of the tail pulley rotation shaft, and controlling the pitch feed amount. Method.
Select an arbitrary transported object, and control the target position where the transported object stops for each transport cycle by the encoder count number from the carry-in position to the target position, and the timing when the selected transported object is carried out, or 2. The method of operating a belt conveyor according to claim 1, wherein control for changing a conveyed product carried in after a cycle arbitrarily determined in terms of control to a conveyed product for controlling a next stop position is repeated.
A method of controlling a transport device comprising a conveyor on which n (n is an integer of 2 or more) transported objects and a driving means for driving the conveyor,
When the transport distance of the transported object from the carry-in part to the carry-out part in the conveyor is LT, the driving is performed so that the pitch feed amount Lp of the conveyor is the size calculated by the equation (1). A method for controlling a transfer device, including a step of controlling the means.
Lp = LT / (n-1) (1)
The transport device further includes detection means for detecting the movement of the conveyor at regular intervals,
In the step of controlling the driving means, the count in the detection means at the time of one pitch feed of the conveyor, where CT is the count number by the detection means when the conveyor moves the transport distance LT. The method for controlling a transfer device according to claim 3, wherein the driving unit is controlled such that the number Cp has a size calculated by the equation (2).
Cp = CT / (n-1) (2)
The step of controlling the driving means includes
Obtaining the position of one of the transported objects on the conveyor based on the number of counts by the detecting means;
When the acquired position of the one conveyed product is compared with the stop position target value and the two do not coincide with each other, the drive means is controlled so as to eliminate the deviation amount, and the conveyor is moved forward or backward. The control method of the conveying apparatus of Claim 4 containing this.
6. The method of controlling a transport apparatus according to claim 5, wherein the control means reselects the one transported object from the transported objects on the conveyor every predetermined cycle.
The conveyor has a conveyor belt and a pair of pulleys around the conveyor belt,
The method of controlling a transport apparatus according to any one of claims 4 to 6, wherein the detection means detects the amount of rotation of the pulley for each fixed angle.
A belt conveyor driving device that is stretched between a head pulley and a tail pulley to pitch-feed a conveyed product,
A motor that intermittently rotates the head pulley;
An encoder that detects the rotation angle of the tail pulley rotation shaft;
An apparatus for operating a belt conveyor, comprising: a control device that controls a target position at which a selected conveyed product stops at each conveyance cycle by the count number of the encoder.
a conveyor on which n (n is an integer of 2 or more) transported objects are placed;
Drive means for driving the conveyor;
When the transport distance of the transported object from the carry-in part to the carry-out part in the conveyor is LT, the drive is performed so that the pitch feed amount Lp of the conveyor is the size calculated by the expression (3). And a control means for controlling the means.
Lp = LT / (n-1) (3)
It further comprises detection means for detecting the movement of the conveyor at regular intervals,
The control means is configured such that the count number Cp in the detection means at the time of one pitch feed of the conveyor is an expression, where CT is the count number by the detection means when the conveyor moves the transport distance LT. The conveying apparatus according to claim 9, wherein the driving unit is controlled to have a size calculated in (4).
Cp = CT / (n-1) (4)
The control means includes
Obtaining the position of one of the conveyed items on the conveyor based on the count by the detecting means;
When the acquired position of the one conveyed product is compared with the target stop position value and the two do not match, the driving means is controlled to cancel or shift the conveyor forward or backward. Item 11. The transport device according to Item 10.
12. The transport apparatus according to claim 11, wherein the control unit reselects the one transported object from the transported objects on the conveyor at predetermined intervals.
The conveyor has a conveyor belt and a pair of pulleys around the conveyor belt,
The transport apparatus according to any one of claims 10 to 12, wherein the detection means detects the amount of rotation of the pulley for each fixed angle.