JPH0442311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention provides a method for transferring plate bodies such as veneer veneers and plywood that are transported at a constant speed to a processing device whose processing speed is slower than the transport speed. The present invention relates to a conveyance control method and apparatus for conveying a plate while changing its conveyance direction to an orthogonal direction by an amount that is compatible with processing capacity.

B. Conventional technology Normally, in the process of manufacturing plates, due to differences in processing capacity of each device sequentially arranged, the conveyance speed of the plate discharged from the previous device and the processing speed of the plate are different. Since the processing speeds of the processing devices disposed at the subsequent stage are different, there are places where the conveyance of the plate is temporarily interrupted and the continuous automatic processing is inhibited.

To enumerate the above points in the plywood manufacturing process, for example, the conveyance speed of the dried veneer veneer discharged from the veneer dryer, and the processing equipment placed in the subsequent stage, i.e., the speed of transport of the veneer veneer after drying discharged from the veneer dryer. Differences in processing speed between sizing cutting equipment and cross-cutting equipment, and veneer veneer assembly equipment for sizing and width veneer veneer, as well as differences in processing speed of plywood discharged from hot press after hot pressing The difference is the conveyance speed of the wafer and the processing speed of the processing device including the sawing device or the joining device disposed at the subsequent stage.

C. Problems to be Solved by the Invention As described above, when the conveyance speed and processing speed of the plate bodies are different, conventionally, the discharged plate bodies are once piled up and the stacked plate bodies are transferred to the processing device. It was necessary to transport the paper to a certain point, and then feed it one by one by manual means or by a known feeding mechanism. For this reason, in the conventional method, the work process is not only complicated, but also causes malfunctions during feeding, resulting in a decrease in work efficiency and yield.Furthermore, as the work process becomes more complicated, the plate may be damaged. It was a result.

D. Means for Solving the Problems Therefore, in view of the above description, the present invention enables conveyance control that performs continuous automatic processing of subsequent plate bodies without interrupting conveyance. A swinging conveyor is placed at the end of the transport conveyor on which the containers are arranged, and a swinging conveyor is placed in swinging communication with either the standby conveyor or the next stage transport conveyor, and a gate that opens and closes for a certain period of time is placed at the end of the standby conveyor. At the same time, a transverse conveyor is provided which is connected to the standby conveyor and converts the conveyance direction to an orthogonal direction, and the detector detects the plate and the first confirmation device provided on the standby conveyor detects the plate. , the oscillating conveyor is raised and lowered depending on the presence or absence of a signal confirming the presence of the plate body conveyed to the front position, and the plate bodies on the conveyor are distributed and conveyed each time. 2. The confirmation device opens and closes the gate depending on the presence or absence of a signal confirming the presence of the plate conveyed to the front position, and confirms that the plate conveyed on the standby conveyor is to be conveyed to the standby or lateral conveyor. It is characterized by

E. Example Hereinafter, the conveyance control of a plate according to the present invention will be explained based on the drawings.

A detector 3 for detecting the plate 2 discharged from the previous stage is arranged on a conveyor 1 connected to a previous stage processing device (not shown). If the plate 2 to be conveyed at this time has a wide shape such as a veneer veneer or plywood of a fixed size, and has a single number, a single detector 3 is placed approximately in the center of the conveyor 1. However, if the size of the plate 2 is narrow, such as a narrow plywood veneer, and multiple sheets are fed in parallel at the same time, the detector 3 can be set at an arbitrary interval perpendicular to the conveying direction. Multiple pieces shall be placed.
The detector 3 may be either a contact type such as a limit switch or a non-contact type such as a phototube as shown.

A swing conveyor 4 is provided at the end of the conveyor 1.
This swinging conveyor 4 is connected to the machine frame 7 via a bracket 6 by an elevating device 5 consisting of a cam mechanism or a fluid pressure mechanism, etc., and performs constant swinging around its starting end 4a as a fulcrum. Corner, its terminal end 4b
can be freely oscillated.

Further, at the terminal end of the swing conveyor 4, a next-stage transport conveyor 8 or a standby conveyor 9 is arranged vertically at a fixed interval, and each starting end thereof is connected to the swing of the terminal end 4b of the swing conveyor 4. At the upper limit of the swing or at the lower limit of the swing, the two are oscillated and communicated so that they are on the same conveyance surface.

In the vicinity of the terminal end of the standby conveyor 9, an opening/closing device 12 consisting of a cam mechanism, a fluid pressure mechanism, etc. is attached to a frame 11 attached to a machine frame 10,
Further, this opening/closing device 12 is connected to a mounting body 15 in which a gate 13 and a feed roll 14 are arranged. Further, an adjustment device 16 consisting of a cam mechanism, a fluid pressure mechanism, etc. is connected to the machine frame 10, and the vertical height of the standby conveyor 9 can be adjusted by a certain amount using the starting end 9a of the standby conveyor 9 as a fulcrum.

Furthermore, between the plurality of rolls 17 disposed perpendicularly to the conveying direction of the plate 2, a belt that can freely appear and retract is set so that the time required for traverse feeding is at the upper limit position with respect to the surface of the rolls 17. A cross-feeding conveyor 18 is disposed, and its circumferential speed is linked to the processing speed of a processing device (not shown) disposed at a subsequent stage. A stopper 19 for regulating the front end of 2 is provided upright.

The conveyance control device configured as described above checks the presence or absence of the plate 2 conveyed to the front position on the swing conveyor 4 and the standby conveyor 9 at the time when the plate 2 detection signal of the detector 3 is input. Based on the output of the first confirmation device, the lifting device 5 is operated to swing the swinging conveyor 4 up or down. That is, when the first confirmation device obtains a signal confirming the presence of the plate 2 conveyed to the front position, the swing conveyor 4 reaches the upper limit of the rise, and conversely, the plate body 2 conveyed to the front position
When the absence confirmation signal is obtained, the swinging conveyor 4 reaches the swinging lower limit, and the plates 2 are distributed and transported on the next stage transport conveyor 8 or standby conveyor 9.

Further, the opening/closing device 12 is operated to control the opening/closing of the gate 13 by the output of the second confirmation device that confirms the presence or absence of the plate 2 placed on the traverse conveyor 18 and conveyed to the front position. That is, when the second confirmation device obtains a signal confirming the presence of the plate 2 conveyed to the front position on the traverse conveyor 18, the gate 13 is in a closed state, and the plate 2 conveyed onto the standby conveyor 9 is closed. When the front end of the plate 2 is struck and, conversely, a signal confirming the absence of the plate 2 transported to the front position is obtained, the gate 13
By opening , the feed roll 14 swings downward to the upper surface of the plate, so that the plate 2 is conveyed onto the traverse conveyor 18 . Then, the plate 2 hits the stopper 19, is transferred onto the traverse conveyor 18, and is conveyed as it is to the subsequent processing device.

If the plate body 2 is relatively rigid, as shown in FIG. If the plate 2 is made to protrude further and is extended so as to hit the stopper 19, or conversely, if the plate 2 is weak and hits the stopper 19 directly, there is a risk of damage. As shown in FIG. 4, the standby conveyor 9 is placed on standby in the lower position, the traverse conveyor 18 is recessed from between the rolls 17, and the plate 2 is temporarily transferred onto the surface of the rolls 17 and moved to the stopper 19. Collapsing, then cross feed conveyor 1
8 is projected to start lateral feeding.
In this case, the former method reduces the time required for transversely feeding the plate body 2 as compared to the latter, and either one is adopted depending on the properties of the plate body 2 to be discharged.

Next, the presence confirmation signal of the plate 2 obtained by the first and second confirmation devices of the conveyance control device is
The case where each time is set arbitrarily will be explained using the control circuit shown in FIG. 5.

When the detector 3 detects the discharged plate 2 for the first time, the detection signal 20 is once input to the discrimination device 21, and from this discrimination device 21 is outputted to the lifting device 5 as the oscillating conveyor descending signal 22. is,
At the same time, it is outputted to a first storage device 23 consisting of a magnetic memory, a backward counting type counter, etc., and thereafter the swinging conveyor lowering signal 22 is continuously outputted from this first storage device 23 to the discriminating device 21.

Furthermore, the detection signal 20 that has passed through the discrimination device 21 is
The distance from the detector 3 position to the gate 13 position is
A timer set to the time _T1 required for conveying plate 2,
It is connected to an arithmetic unit 26 via a first delay device 25 consisting of a counter, shift register, etc.

Further, the output signal from this calculation device 26, which will be described later, is transmitted to a second delay device consisting of a timer, a counter, etc., which sets the opening/closing time T2 necessary for feeding the plate ₂ on the standby conveyor onto the traverse conveyor 18. 2
7, and further this second delay device 27,
Plate body 2 conveyed onto the lateral conveyor 18
However, the third delay device 28 consisting of a timer, a counter, a shift register, etc., which is set to the time _T3 required to complete the traversal movement, is configured as a series circuit.

On the other hand, the second delay device 27 includes a magnetic memory,
A second memory device 29 consisting of a back calculation type counter, a self-holding circuit, etc. is connected in parallel, and this second memory device 29 starts storing at the same time as the input to the second delay device 27, and when the set time T ₂ has elapsed. The gate closing prohibition signal 30 is continuously outputted to the arithmetic unit 26 until its memory is reset by the third delay device 28.
A storage device 31 is connected in parallel, and this third storage device 31 starts storing at the same time as the input to the third delay device 28, and continues to operate in the arithmetic device until the storage is reset at the elapse of the set time _T3 . 26, an output prohibition signal 32 serving as a gate closing signal is continuously outputted.

In the arithmetic unit 26, when the time T1 has elapsed and the signal passed through the first delay device 25 is inputted when the plate ₂ is first transported, the output prohibition signal 32 from the third storage device 31 is not yet returned. Since it has not been done,
As a result of the calculation, a gate opening signal 33 is outputted to the opening/closing device 12, and at the same time, this gate opening signal 33 is outputted to the first storage device 23 as a board confirmation signal, and the same signal is returned to the discriminating device 21. , the plate body 2 to be discharged second can be conveyed onto the standby conveyor 9.

Further, the gate opening signal 33 is output to the second delay device 27 and the second storage device 29, and when the set time _T2 has elapsed, the gate closing prohibition signal 30 is reset, and the gate closing signal 34 is output to the opening/closing device 12.
At the same time, a start signal is output to the third delay device 28 and the third storage device 31.
During this time, the first plate 2 on the standby conveyor 9 is conveyed onto the traverse conveyor 18 by the feed roller 14, which swings downward as the gate 13 is opened.

Next, the first plate 2 is moved on the transverse conveyor 18.
starts being traversed, and completes the traverse feeding when the set time _T3 in the third delay device 28 has elapsed, and at the same time, the output prohibition signal 32, which is a gate closing signal to the arithmetic unit 26 of the third storage device 31, is reset. .

In the above control, whether or not the plate 2 is present on the standby conveyor 9 can be confirmed by the conveyance time T ₁ of the plate 2 from the detector 3 position to the gate 13 position.
Also, whether or not the plate 2 is present on the lateral conveyor 18 can be confirmed by checking the opening/closing time T ₂ for feeding the plate 2 on the standby conveyor 9 onto the lateral conveyor 18.
The determination is made based on whether or not the time (T ₂ +T ₃ ), which is the sum of the time T ₃ required for the plate 2 on the traverse conveyor 18 to complete traverse transport, has elapsed. Therefore, the set time may be arbitrarily set according to the shape of the plate to be transported, the interval at which the plate is discharged from the processing device in the preceding stage of the device, and the like.

Therefore, if each set time is determined by the inequality T ₁ < T ₂ + T ₃ , first the transfer conveyor 1
The first plate 2 that is discharged upward and detected by the detector 3 does not oscillate because the oscillating conveyor lowering signal 22 is output from the discriminating device 21 and the gate opening signal 33 is output from the arithmetic device 26. Conveyor 4, standby conveyor 9, cross conveyor 18
They will be transported upwards one after another.

If the transport time difference between the second plate 2 detected and the first plate 2 detected is greater than T ₁ , the gate is opened after T ₁ has passed, and the first plate 2 has already been traversed. Since the gate opening signal is fed onto the conveyor 18, as is clear from the control circuit diagram in FIG. This means that the oscillating conveyor lowering signal 22 is continuously outputted, and the second plate 2 is conveyed onto the standby conveyor 9.

Conversely, if the conveyance time difference between the second detected plate 2 and the first detected plate 2 is smaller than _T1 , the first plate 2 is still transferred from the standby conveyor 9 to the traverse conveyor. 18 and the plate confirmation signal from the first storage device 23 has not been returned to the discriminating device 21, the discriminating device 21 outputs the swinging conveyor rising signal 24, and the second The plate body 2 will be conveyed onto the conveyor 8 of the next stage.

Furthermore, if the transport time difference between the second detected plate 2 and the first detected plate 2 is T ₁ , then
According to the above inequality, when T ₁ has elapsed, the time T ₂ +T ₃ from when the first plate 2 is fed onto the traverse conveyor 18 until the traverse is completed has not yet elapsed. This means that the output prohibition signal has been input from the storage device 31, and the time it takes for the second plate 2 to be conveyed from the detector 3 position to the gate 13 position from the above time (T ₂ + T ₃ ).
Time minus T ₁ (T ₂ + T ₃ − T ₁ ), gate 1
3 is closed, it becomes a standby state. This waiting time
The plate confirmation signal from the first storage device 23 has not been returned to the discrimination device 21, and the third or subsequent plate 2 detected is not transported onto the next conveyor 8. become.

Conversely, if the set time of the inequality is determined by T ₁ > T ₂ + T ₃ , the time T ₁ to transport the plate 2 from the detector 3 position to the gate 13 position is longer than the lateral feed. Plate body 2 fed out onto conveyor 18
is longer than the time T ₂ + T ₃ required to complete the traversal feed, so as described above, the first plate 2 is fed out onto the traverse conveyor 18 via the swinging conveyor 4 and the standby conveyor 9. For example, since time T ₁ has elapsed, the second plate 2 is conveyed to the standby conveyor 9. At this time, the first plate 2 is being fed horizontally on the transverse conveyor 18, but by the time the second plate 2 reaches the gate 13 position T1, _T2 has already passed _.
+T ₃ has elapsed and the horizontal feed is completed.
The output inhibit signal input from the third storage device 31 to the arithmetic unit 26 is reset, and the gate 13 is opened. The plates 2 that are sequentially detected are first checked for the presence or absence of the preceding plate 2 on the standby conveyor 9 by obtaining a signal from the discrimination device 21.
Also, by obtaining a signal from the calculation device 26, the presence or absence of the front plate 2 on the traverse conveyor 18 is confirmed, so that it is sorted and conveyed onto the standby conveyor 9 or the next conveyor 8 each time. ,
Further, it is fed out or placed on standby on the standby conveyor 9.

In addition, instead of the above-mentioned confirmation device based on the time setting, contact type or non-contact type detectors arranged on the swinging conveyor 4, the standby conveyor 9, and the traverse conveyor 18 can be used as a contact type or non-contact type detector. 12
It is also possible to control In this case, a plurality of detectors are required to be placed on each conveyor in order to correspond to the length and width of the plate 2 being transported.
Especially when simultaneously feeding narrow-width veneer veneers,
The number of locations increases according to each shape.

As described above, the apparatus using the above conveyance control method,
By installing a plurality of such devices at appropriate intervals on the extension line of the next-stage conveyor, and by arranging similar post-processing devices for each, continuous automatic processing of plates can be reliably performed. In this case,
Naturally, the more upstream the processing device is located, the higher its operating rate is compared to the downstream processing device.

F. Effects of the Invention As described above, according to the present invention, continuous automatic processing of plates is possible even when the conveyance speed of plates discharged from the previous stage process and the processing speed in the latter stage processing process are different. This not only simplifies the work steps required in the conventional method described above, such as stacking the plates, transporting the stacked plates to the processing process, and feeding the plates to the processing equipment, but also simplifies the work processes required in the conventional method described above. Various effects such as malfunctions and damage to plates are eliminated, work efficiency and yield are expected to be improved, and the installation area is reduced, and the practical benefits are enormous.

[Brief explanation of drawings]

Fig. 1 is a side view showing an embodiment of the apparatus using the plate conveyance control method of the present invention, Fig. 2 is a schematic plan view of the same, and Figs. 3 and 4 show the plate transferred to a transverse conveyor. FIG. 5, which is an explanatory diagram of the operation during transfer, is a control circuit diagram. DESCRIPTION OF SYMBOLS 1... Conveyance conveyor, 2... Plate, 3... Detector, 4... Oscillating conveyor, 5... Lifting device, 8...
...Next stage conveyor, 9...Standby conveyor, 1
2... Opening/closing device, 13... Gate, 18... Traverse conveyor, 19... Stopper, 20... Detection signal, 21... Discrimination device, 23... First storage device,
25...First delay device, 26...Arithmetic device, 27
...Second delay device, 28...Third delay device, 29
...Second storage device, 31...Third storage device.

Claims (1)

[Scope of Claims] 1. A conveyor in which a detector is disposed, an oscillating conveyor whose terminal end is swingable up and down using the terminal end position of the conveyor as a fulcrum, and an oscillating conveyor provided at the upper limit position of the oscillating conveyor. a next-stage transport conveyor, a standby conveyor provided at the lower limit position, a gate that can be freely opened and closed located at the end of the standby conveyor, and a traverse conveyor connected to the standby conveyor to convert the conveyance direction to an orthogonal direction. and a first confirmation device for confirming the presence or absence of a plate on the standby conveyor, and a second confirmation device for confirming the presence or absence of a plate on the traverse conveyor,
When the detector detects the plate and the first confirmation device obtains a signal confirming the presence of the plate on the standby conveyor, the oscillating conveyor is connected to the next transport conveyor, and conversely the plate is detected. When the absence confirmation signal is obtained, the swinging conveyor is connected to the standby conveyor, and the plates on the conveyor are sorted and conveyed each time.Meanwhile, the gate is controlled by the second confirmation device to convey the plates on the lateral conveyor. A method for controlling the conveyance of a plate, characterized in that only when a signal confirming the absence of the plate is obtained, the plate on the standby conveyor is conveyed onto the traverse conveyor while the conveyor is in an open state for a certain period of time. 2. A conveyor on which a detector is arranged, an oscillating conveyor whose terminal end can swing up and down with the terminal end of the conveyor as a fulcrum, and an upper limit position of the terminal end of the oscillating conveyor. A conveyor in the next stage with which its starting end communicates, a standby conveyor with which its starting end communicates with the lower limit position of the oscillating conveyor's terminal end, and a standby conveyor disposed at the terminal end of the standby conveyor so as to be openable and closable via an opening/closing device. a cross-feeding conveyor for converting the conveying direction of the plate to an orthogonal direction by fixing a stopper at the side end; a first confirmation device for checking the presence or absence of a plate on the standby conveyor; a second confirmation device for confirming the presence or absence of a plate on the conveyor;
When the detector detects a plate by the confirmation device, if a plate is present on the standby conveyor, the swinging conveyor will be at the upper limit position, and if there is no plate, the elevating device will be moved to the lower limit position. Operation control is performed, and the opening and closing of the gate is controlled by the second confirmation device such that the gate is opened only when there is no plate on the traverse conveyor. A conveyance control device for a plate body, characterized in that: