JP2782645B2 - Ascending speed control method for up-stacker device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a rising speed of an up-stacker when the up-stacker separates a plate-like object.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram schematically showing an up-stacker device. In FIG. 3, a long band of corrugated cardboard moving rightward from the left is cut into a predetermined length by a cutter 7 to become a corrugated cardboard plate 8 as a plate-like object, and the supply conveyor 5 moves the corrugated cardboard plate 8 rightward. I'm moving. In FIG. 3, the loading conveyors are No. 4 loading conveyor 4, No. 3 loading conveyor 3, No. 2 loading conveyor 2,
The first loading conveyor 1 is arranged in series, and the corrugated board 8 received from the supply conveyor 5 is transported further rightward, and the corrugated board 8 is stacked on a pallet 9 as a loading table. By the way, as the corrugated board 8 is stacked on the pallet 9, it is necessary to gradually raise the tip of the loading conveyor. In view of this, an up-stacker device attaches the loading conveyor lifting motor 6M to the tip of the loading conveyor and raises the motor. (Instead of raising the tip of the loading conveyor, the down stacker device moves the pallet 9 downward.)

The four loading conveyors are respectively a No. 1 loading conveyor drive motor 1M, a No. 2 loading conveyor drive motor 2M, a No. 3 loading conveyor drive motor 3M, and 4
Since comprise a separate loading conveyor drive motor 4M No., but can be operated at each loading conveyor different speeds, usually operated four sets at the same speed V _0. Although the supply conveyor 5 is to operate with a feed conveyor drive motor 5M, the traveling speed of the supply conveyor 5 is fast V ₅ becomes a value than the running speed V ₀ which loading conveyor described above. Therefore, the corrugated board 8 that has moved in one row on the supply conveyor 5 also moves on the loading conveyor in an overlapping manner.

FIG. 4 is an enlarged view showing a state in which corrugated boards are overlapped on a loading conveyor. Here, assuming that the thickness of the corrugated board 8 is D, the length of the corrugated board 8 in the moving direction is L, and the length of the overlapping portion of the corrugated board 8 is l ₀ , the overlap difference l is L− ₁₀ . Become.
Difference l of this overlap, the loading calculated from the ratio of the velocity V ₀ which conveyor the speed V ₅ of the feed conveyor 5. Here, since the traveling speed of each loading conveyor is V ₀ as described above, the number N (that is, density) of the corrugated cardboard plates 8 stacked on the pallet 9 per unit time is a value represented by the following equation (1).

[0005]

(Equation 1)

The product of the number N of the corrugated board 8 loaded per unit time and the thickness D of the corrugated board 8 is the rising speed U of the loading conveyor tip. Therefore, using the above equation 1, the rising speed U can be expressed by the following equation 2.

[0007]

(Equation 2)

When the number of corrugated boards 8 loaded on the pallet 9 reaches a predetermined number or when the size of the corrugated board 8 is changed, the pallets 9 must be replaced. The corrugated board 8 is still sent at a constant speed. Therefore, to separate the corrugated board 8 so as to switch to a new pallet 9 while continuing the conveyance of the corrugated board 8 is a so-called "separation" operation.

This separation is performed as follows. That is, during the steady operation, the speed V ₀ of each loading conveyor is lower than the speed V ₅ of the supply conveyor 5 as described above, but the last corrugated board 8 to be loaded on the pallet 9 is moved from the supply conveyor 5 to the fourth loading conveyor. at the moment of moving to 4, as well as the speed of the conveyor 4 loading this No.4 fast V ₄ becomes than the speed V ₅ of the feed conveyor 5, No. 3 loading speed of the conveyor 3 4 No. loading speed of the conveyor 4 V V ₃ slower than ₄
And the speed of the No. 2 loading conveyor 2 is set to V ₂ which is lower than the speed V ₃ of the No. 3 loading conveyor 3 Further, the speed of the first loading conveyor 1 is changed to a value of V ₁ which is lower than the speed V _{2 of the} second loading conveyor 2, and the speed of each loading conveyor is changed.
When the last cardboard plate 8 above in this state shifts from No. 4 loading conveyor 4 No. 3 loading conveyor 3 returns the speed of the No. 4 loading conveyor 4 to V ₀ becomes the original value. Further, if the last corrugated board 8 is moved from the No. 3 loading conveyor 3 to the No. 2 loading conveyor 2, the speed of the No. 3 loading conveyor 3 is also returned to the original V ₀ and if the No. 1 loading conveyor 1 is moved, the No. 2 loading is carried out. The speed of the conveyor 2 is returned to the original V _0, and when the last corrugated board 8 is put on the pallet 9, the speed of the No. 1 loading conveyor 1 is returned to the original V ₀ . Thus, the conventional pallet 9
And the first corrugated board 8 on a new pallet 9 can be adequately spaced on the loading conveyor.

[0010]

As described above, the rising speed of the up-stacker device is proportional to the number N of the corrugated board 8 loaded per unit time. However, since the speed of the loading conveyor is not constant during the separation work, the ascending speed of the up-stacker device must be changed accordingly.However, at what point in time what value should be increased? At present, the climb speed is changed step by step in order not to do so. That is, since the transfer speed of the corrugated board 8 from the loading conveyor to the pallet 9 does not match the rising speed of the loading conveyor tip, the corrugated board 8 may not be aligned on the pallet 9 and may collapse. However, there has been a disadvantage that it takes human labor to align them. Further, if there is a change in the thickness or length of the corrugated board 8 or a change in the speed of the supply conveyor 5 accompanying the change,
It is necessary to calculate how to change the ascending speed of the loading conveyor tip every time, and there is also an inconvenience that the speed setting is troublesome and the setting is inaccurate.

An object of the present invention is to appropriately control the ascending speed of the up-stacker device in response to a change in the density of the plate-like object placed on the loading table during the separating operation of the up-stacker device. The object of the present invention is to enable the plate-like objects to be aligned and mounted on a loading table even if the point of the above is changed.

[0012]

In order to achieve the above object, a method for controlling a rising speed according to the present invention comprises the steps of:
A plurality of conveyors, each of which can independently control a conveying speed, and a loading conveyor which is arranged in series, wherein the supply conveyor conveys a plate-like object having a predetermined length and a predetermined thickness at a constant speed, and the loading conveyor is provided with the supply conveyor. Driving at a lower speed to receive the plate-like object, and the loading conveyor stacks the plate-like object on the loading table while raising its tip, the final plate-like object mounted on the loading table is At the beginning of the decoupling from the supply conveyor to the loading conveyor, the loading conveyor raises the speed of the conveyor closest to the supply conveyor above the supply conveyor speed, and reduces the respective loading conveyor speeds following this conveyor. Each of the loading conveyors, which is operated at a speed lower than the conveyor speed of the preceding stage and the passage of the final plate-like object is completed, In the operating method of the up-stacker device which operates by returning the speed to the initial speed lower than the supply conveyor speed, at the start of the separation, the plate at the rear end position of each of the plurality of conveyors constituting the loading conveyor is provided. Each time these specific plate-like objects are moved from the tip of the loading conveyor to the loading table, the rising speed of the tip of the loading conveyor is changed.However, before the separation start time, The value obtained by subtracting the length of the overlapping portion of the plate-like object from the predetermined length of the plate-like object on the loading conveyor is obtained from the supply conveyor speed and the loading conveyor speed, and the predetermined thickness of the plate-like object is divided by this value. Then, the value obtained by multiplying the speed at the start of the separation of each conveyor constituting the loading conveyor by the result of the division operation is referred to as the value. And write conveyor tip rising speed of the rise rate is assumed to the specific plate-shaped object corresponding to each conveyor is continued until discharged from the tip of the loading conveyor.

[0013]

The overlap difference l of the plate-like object is a value inversely proportional to the number N of the plate-like objects loaded per unit time.
It changes each time it passes through a conveyor of different speeds. Therefore, if the speed of each loading conveyor at the start of separation is known, the overlap difference l ₁ when the plate-like object placed on the No. 1 loading conveyor 1 is placed on the loading table at the start of separation is determined.
Is equal to the difference l of the overlap of the plate-like objects before the start of separation.
However, at the start of separation, the No. 2 loading conveyor 2
Difference l ₂ of overlap when put have been a plate-like object in the stacking table which rests on the overlap of the difference l ₃ when mounting the plate-like object which has been placed on the conveyor 3 loading No. 3 to disconnect the beginning to the stacking table and, The overlap difference l when the plate-like object placed on the No. 4 loading conveyor 4 at the start of separation is placed on the loading table
₄ can be represented by Equations 3, 4, and 5, respectively. Where V ₁ , V ₂ , V ₃ , and V ₄ are the speeds of each loading conveyor immediately after the start of separation.

[0014]

(Equation 3)

[0015]

(Equation 4)

[0016]

(Equation 5)

Therefore, from the equations (3), (4) and (5) and the above-mentioned equations (1) and (2), the loading conveyor for mounting the plate-like object on the first loading conveyor 1 at the time of starting the separation on the loading table. The ascending speed U _{1 of the} tip is expressed by Equation 6. Similarly, the ascending speeds U ₂ , U of the leading end of the loading conveyor when the plate-like object placed on the second loading conveyor 2, the third loading conveyor 3, and the fourth loading conveyor 4 is loaded on the loading table.
₃ and U ₄ are represented by Expressions 7, 8, and 9.

[0018]

(Equation 6)

[0019]

(Equation 7)

[0020]

(Equation 8)

[0021]

(Equation 9)

As is apparent from the equations (6) to (9), the ascending speed of the loading conveyor during separation is "the product of the speed of the conveyor on which the plate-shaped object is placed at the start of separation and the thickness of the plate-shaped object." Divided by the difference in the overlap of the plate-like objects before the start of the separation. " Therefore, a separation point between a conveyor in which the number of stacked sheets per unit time (that is, density) N changes and a conveyor adjacent thereto is tracked from the start of separation, and every time the separation point reaches the tip of the loading conveyor. By switching to the ascending speed calculated by the equations (6) to (9), the plate-like objects can be smoothly stacked on the loading table.

[0023]

FIG. 5 to FIG. 9 show changes in the state of each conveyor before the start of separation and after the start of separation. FIG. 5 shows the state of a plate-like object on each conveyor before the start of separation. It is a figure showing the speed of each conveyor. Before disconnecting the start speed of the feed conveyor 5 is a V _5, although the cardboard plate 8 as a plate-like object is moving in a row, four sets of from 4 No. loading conveyor 4 to No.1 loading conveyor 1 Since all the loading conveyors are operating at a speed V ₀ lower than V ₅ , the corrugated board 8 is moving overlapping.

FIG. 6 is a diagram showing the state of a plate-like object on each conveyor immediately after the start of separation and the speed of each conveyor.
After disconnecting start the speed of the feed conveyor 5 remains V _5, is faster than V ₅ 4 No. loading speed of the conveyor 4 V
Rise to ₄ . The speed of No. 3 loading conveyor 3 is V ₃
, The No. 2 loading speed of the conveyor 2 to V _2, 1 No. loading speed of the conveyor 1 is increased respectively to V _1. Therefore, the relative magnitude relation between these velocities is as shown in Expression 10. At the start of the separation, the speed of each loading conveyor is set as described above, and the corrugated board 8 at the rear end position of the first loading conveyor 1, that is, at the sectioning point is specified. Similarly, a corrugated board 8 at a section point which is a rear end position of the No. 2 loading conveyor 2, a corrugated board 8 at a section point which is a rear end position of the No. 3 loading conveyor 3, and a rear end of the No. 4 loading conveyor 4 The corrugated cardboard plate 8 at the section point that is the position is specified.

[0025]

(Equation 10)

FIG. 7 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the sectioning point shown in FIG. 6 reaches the leading end A of the loading conveyor. At this time 1
The speeds of No. 1, No. 2, and No. 3 conveyors are V ₁ , V ₂ , and V, respectively.
₃ , which is the same value as in FIG. 6, but the speed of the No. 4 loading conveyor 4 has returned to the value V ₀ before separation.

FIG. 8 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the section point shown in FIG. 6 reaches the leading end A of the loading conveyor. At this time 1
Speed V _{1 of} No. 1 conveyor 2 and No. 2 conveyor 2
And V ₂ have the same values as in FIG. 6, but the speeds of the No. 4 loading conveyor 4 and the No. 3 loading conveyor 3 have each returned to the value V ₀ before separation.

FIG. 9 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the section point shown in FIG. 6 reaches the leading end A of the loading conveyor. At this time 1
No. loading velocity V ₁ of the conveyor 1 is the same value as in FIG. 6, No. 4 loading conveyors 4,3 No. loading conveyor 3, and No. 2 loading speed of the conveyor 2 returns to a value V ₀ which before disconnecting, respectively ing. It can be seen that the interval between the last corrugated board 8 at the start of separation, that is, the corrugated board 8 at the sectioning point, and the first corrugated board 8 placed on a new pallet 9 is sufficiently widened.

FIG. 2 is a control system diagram showing the configuration of the present invention. The microcomputer 20 comprises a No. 1 loading conveyor 1 or a No. 1 pulse transmitter 1P coupled to a No. 1 loading conveyor drive motor 1M for driving the same. , But also the No. 2 pulse transmitter 2P for the No. 2 loading conveyor 2, the No. 3 pulse transmitter 3P for the No. 3 loading conveyor 3, and the No. 4 pulse transmission for the No. 4 loading conveyor 4. The signal from the device 4P is also input. On the basis of these signals and the disconnection start signal, 1 is output via the motor control circuit 1C.
No. loading conveyor drive motor 1M, motor control circuit 2C
No. 2 loading conveyor drive motor 2M via the motor and No. 3 loading conveyor drive motor 3 via the motor control circuit 3C
M, while driving the No. 4 loading conveyor drive motor 4M via the motor control circuit 4C and the supply conveyor drive motor 5M via the motor control circuit 5C, and simultaneously controlling the loading conveyor lifting motor 6M via the motor control circuit 6C. Drive at speed.

FIG. 1 is a flowchart showing an embodiment of the present invention. The contents of the present invention will be described below with reference to this flowchart. That is, the memory 32 and the memory 33 provide the arithmetic memory 34 with the thickness D of the corrugated board 8 as a plate-like object and the overlap difference 1 during normal operation. Here, when the judgment 21 detects the start of the separation, the respective conveyor speeds at the start of the separation are given from the memory 31 to the calculation memory 34, and the calculation memory 34 starts the calculation of the loading conveyor tip rising speed. At the same time, the process 41 starts tracking the section points of each conveyor.

Until the judgment 22 detects that the section point has reached the leading end A of the loading conveyor, the operation memory 3
The value U ₁ calculated in step 4 appears in the processing 42 as the rising speed of the loading conveyor tip A. Similarly, U ₂ is used until the segment point reaches tip A, and
In the U ₃ until it reaches, the U ₄ until further partitioned point reaches the distal end A, the rising speed of the conveyor tip A loading respectively. If the judgment 25 detects that the section point has reached the leading end A, the separating operation is completed and the state returns to the original state.

Since a separate pulse generator is mounted on the drive shaft or driven shaft of each loading conveyor, the specific corrugated cardboard plate 8 located at each sectioning point at the start of separation is separated from the leading end A of the loading conveyor. Is reached or not.
The determination is easy by counting the number of pulses from the start of separation.

[0033]

According to the present invention, when separating a plate-like object being conveyed by the up-stacker device, each of the plurality of series-arranged conveyors constituting the loading conveyor at the start of the separation is separated. The plate-like object at the rear end position is specified, and the speed of each loading conveyor, the thickness of the plate-like object, and the difference of the overlap of the plate-like objects are stored as data. By using these data, every time the specific plate-like object reaches the tip of the loading conveyor, the rising speed of the tip of the loading conveyor can be appropriately changed. As a result, since the plate-like objects are stacked on the loading table without being separated, the effect of eliminating the trouble of arranging the plate-like objects to prevent the collapse of the load can be obtained. It is needless to say that even if the kind or the item (for example, the plate thickness or the cutting length) is changed, the change can be appropriately dealt with and the trouble of aligning the plate-like objects can be omitted.

[Brief description of the drawings]

FIG. 1 is a flowchart showing an embodiment of the present invention.

FIG. 2 is a control system diagram showing the configuration of the present invention.

FIG. 3 is a configuration diagram schematically showing an up-stacker device.

FIG. 4 is an enlarged view showing a state in which corrugated boards are overlapped on a loading conveyor.

FIG. 5 is a diagram showing a state of a plate-like object on each conveyor and a speed of each conveyor before starting separation.

FIG. 6 is a diagram illustrating a state of a plate-like object on each conveyor immediately after starting separation and a speed of each conveyor.

FIG. 7 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the sectioning point shown in FIG. 6 reaches the leading end A of the loading conveyor.

8 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the section point shown in FIG. 6 reaches the leading end A of the loading conveyor.

9 is a diagram showing the state of a plate-like object on each conveyor and the speed of each conveyor when the section point shown in FIG. 6 reaches the leading end A of the loading conveyor.

[Explanation of symbols]

 1 No. 1 Loading Conveyor 1M No. 1 Loading Conveyor Drive Motor 1P No. 1 Pulse Transmitter 2 No. 2 Loading Conveyor 2M No. 2 Loading Conveyor Drive Motor 2P No. 2 Pulse Transmitter 3 No. 3 Loading Conveyor 3M No. 3 Loading Conveyor Drive Motor 3P 3 No. 4 pulse generator 4 No. 4 loading conveyor 4M No. 4 loading conveyor drive motor 4P No. 4 pulse generator 5 Supply conveyor 5M Supply conveyor drive motor 6M Loading conveyor elevating motor 7 Cutter 8 Corrugated board as a plate-like object 9 Pallet 20 Microcomputer 21 Judgment 22 Judgment 23 Judgment 24 Judgment 25 Judgment 31 Memory 32 Memory 33 Memory 34 Operation memory 41 Processing 42 Processing 43 Processing 44 Processing 45 Processing

Claims (3)

(57) [Claims] The present invention comprises a supply conveyor and a loading conveyor having a plurality of conveyors in which a transfer speed can be separately controlled, wherein the supply conveyor conveys a plate-like object having a predetermined length and a predetermined thickness at a constant speed. Then, the loading conveyor operates at a lower speed than the supply conveyor to receive the plate-like object, and the loading conveyor raises the tip thereof to stack the plate-like object on the loading table. At the beginning of the separation when the final plate-shaped object to be loaded is transferred from the supply conveyor to the loading conveyor, the loading conveyor sets the speed of the conveyor closest to the supply conveyor to be higher than the speed of the supply conveyor and to the conveyor. The speed of each succeeding loading conveyor is sequentially reduced from the speed of the preceding conveyor, so that the final plate-like object is passed. In the operating method of the up-stacker device in which the completed loading conveyor is operated by returning its speed to the initial speed lower than the supply conveyor speed, at the time of starting the separation, each of the plurality of conveyors constituting the loading conveyor is operated. The plate-like objects at the rear end position are separately specified, and each time these specific plate-like objects move from the leading end of the loading conveyor to the loading table, the rising speed of the leading end of the loading conveyor is changed. Speed control method of an up-stacker device to be controlled. 2. A method of controlling a rising speed of an up-stacker device according to claim 1, wherein a predetermined length of said plate-shaped object on said loading conveyor before said separation start time is determined by an overlap portion length of said plate-shaped object. Is obtained from the supply conveyor speed and the loading conveyor speed, and the predetermined thickness of the plate-like object is divided by the overlapping difference value to start separating each conveyor constituting the loading conveyor. A value obtained by multiplying the speed in the above by the division operation result is defined as a rising speed of the tip of the loading conveyor, and the rising speed continues until the specific plate-like object corresponding to each conveyor is discharged from the tip of the loading conveyor. A method of controlling a rising speed of an up-stacker device. 3. A method for controlling a rising speed of an up-stacker device according to claim 1, wherein each of the conveyors constituting the loading conveyor has one of a drive shaft and a driven shaft of the conveyor. An up-stacker device, wherein separate pulse generating means are attached to each other, and the point at which the specific plate-like object is discharged from the tip of the loading conveyor is detected by counting the number of pulses output by the pulse generating means. Method of controlling the climb speed.