JPH03211001A - Device for sensing cut length and automatically setting material feeding speed - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A1.Object of the invention (industrial application field) The present invention is a device that detects the cutting length of a material used in lumber and woodworking machines and automatically sets the material feeding speed.

In detail, the cutting length of the supplied material is automatically detected, the optimal material feeding speed is determined for this cutting length, and the material is fed at this speed to achieve the best cutting performance, efficiency, and tool durability. The present invention relates to a device that automatically sets a material feeding speed to obtain the following.

(Prior art) Conventionally, in the lumber and woodworking industries, workers judge the cutting length of the material supplied to the machine by L1 measurement, decide by feeling the material feeding speed suitable for this judgment value, and The lumber was sawn and wood was removed by operating the controller so that the lumber feeding device moved at the same speed.

(Problems to be Solved by the Invention) When the operator determines the cutting length and sets the material feeding speed as described above, it is necessary to perform material feeding, processing, sorting of products and remaining materials,
Even if we try to automate these removals and make the work unmanned,
The purpose of unmanned operation cannot be achieved because the operations described above require manual labor, and furthermore, judging the cutting length by feeling and determining the material feeding speed are difficult to be accurate in these days due to the lack of skilled workers. Machining accuracy is improved by determining the appropriate material feeding speed.
The current situation is causing problems in terms of efficiency, durability of cutlery, etc.

The present invention was made in response to this current situation, and automatically detects the cutting length of materials supplied to lumber and woodworking machines, and based on this detected value, comprehensively improves accuracy, efficiency, durability of cutlery, etc. The material feeding speed that satisfies the best performance conditions is automatically determined, and the material feeding device performs the shipping at this speed for sawing, wood removal, etc., resulting in high accuracy and efficiency, and the durability of the cutter. Our aim is to provide superior sawmilling and woodworking machines.

1. Structure of the Invention (Means for Solving the Problems) The means of the present invention for achieving the above object includes a means for detecting the cutting length of the workpiece, and an appropriate feed based on the detected cutting length. A means for determining a material speed control value, and a means for controlling a material feeding device based on the determined control value to feed material at an appropriate speed. This is in the configuration of the device that automatically sets the speed.

(6) The device of the present invention, which is configured as shown in Sakumf, is as follows: When the material to be removed enters the cutting length detection position, the detection means detects the cutting length, and outputs a detection signal in accordance with this. is output, and this signal output is input to a means for calculating or selecting a control value.Then, the means for calculating or selecting a control value selects the optimum feed material for the curved cutting length based on the input detected value. The speed control value is calculated or selected and inputted to the control means.The control means adjusts the rotational speed of the electric motor that drives the feeding means based on the input value so as to obtain an appropriate material feeding speed. .For this reason, the material feeding device works to feed and process the material by cutting tools such as saws and cutters at the optimum speed for the cutting length. The process is carried out unmanned under ideal conditions with little turbulence.

(Example) Hereinafter, an example of an apparatus related to the present invention will be described based on the drawings.

Figures 1 to 5 show an embodiment of a twin band saw machine using a device that uses image processing, and this embodiment basically consists of a television camera 1, an image processing device 2, and a control device. 3
The television camera 1 is made up of a material 4.
Since the end portion 21 with the minimum cross-sectional area of L.I.
It is sufficient to provide it only on the a side. However, some material 4 is fed upside down because it is difficult to distinguish between the end end a and the end end. Accuracy can be ensured by sending the image to the image processing device 2 for determination and calculating the image on the end a side as information. However, if such accuracy is not required, only one television camera 1 may be used. Next, in order to accurately detect the cutting length using this TV camera, the TV camera 1 must be perfectly centered with the material 4.
Since it is necessary to maintain a constant distance from the end 11a and the 7:1 side 11b, the television camera 1 is fixed at a fixed position on the end Ija side and the material 4 is
As shown in FIG. 1, by pressing the material 4 against the positioning member 6, the distance from the end rf, la can be kept constant. As shown in Figure 1, the moving table 71\pressing member 8 is installed so as to maintain a constant distance from the member 8, and when the moving table 7 is advanced and the pressing member 8 presses the material 4 against the positioning member 6, the material 4 is pressed against the positioning member 6. The television camera 1 on the other side is also kept at a constant distance from the original ``1F'', and the centering of the camera and the material 4 is done by adjusting the position and height using the respective adjustment means 9 and 1 ( )
(2) Using the loader 5, which can be adjusted according to the following, it is moved automatically by the operation of the control device 3 based on the commands from the image processing device 2.

The image processing device 2 includes a central processing unit CPU, a camera interface ■Fl, an input/output interface IF2,
Monitor TV MT, position detector DS, printer P
'f' (from ζ) nvJ is formed, central processing unit CPU
is the central part of the image processing device 2 and controls the entire device, and uses a 16-bit microcomputer. This central processing unit CPU processes the material 4 based on the area data based on the image of the end a of the material 4 taken by the television camera 1.
At the same time as calculating the diameter grade of the image, superimposing a selected one from among the wood cutting patterns Y) as shown in FIG.
After determining the suitability of pattern p, the conformity deviation is determined by calculating the cutting area by multiplying the IJJ cutting length at I-2 by the blade width ■1 input in advance at each cutting position as shown in Figure 4. The cutting area is multiplied by a coefficient to calculate the control value of the material feeding speed suitable for the corresponding cutting area, and this is used as sawmilling information to be sent to the control device W3.
The rotational speed of the motor 12 that drives the material feeding device 11 is adjusted to move the material 4 through the two saws 13.1 at an appropriate speed.
3, where the material is sawn under ideal conditions.

Camera interface TF, central processing unit CPU
According to the instructions, the TV camera was switched by 1°, the image was binarized, and the Kidori pattern P was superimposed on the photographed original image.
Further, character data is overwritten, etc., and the information is displayed as a video signal on a monitor television MT''.

The position detector DS detects the position of the center of gravity of the binarized image of the video taken by the television camera 1- as coordinates on the television screen, and supplies rocking data to the CPLI.

Input/output interface■ [22 is the central processing unit CP
It outputs lumber information such as the material feeding speed control value calculated by U to the control device 3J, outputs product cutting information to the printer PT, and outputs blinking signals to the indicator lights PL and S. , input and output of signals such as inputting the state of the operation switch S and the operating state of the control device CE to the central processing unit CPU are performed digitally.

The printer P'■' operates a printing machine according to the inputted product cutting information, records the information, and leaves the lumber tabulation results.

The control device CE controls the drive motor 1 of the material feeding device 11 that sends the material 4 loaded on the material feeding device 8 to the two saws 13 and 13 based on the output from the input/output interface IF2.
2 and controls the operation of the means 9 and 10 for adjusting the position and height of the V loader 5, using a known sequencer or a microcomputer. .

In the apparatus shown in the above embodiment, when the material 4 is carried into the V loader 5/\ by the carrying means 14 as shown in FIG.
When the television camera 1 at the starting end b (ll!! The distance to the mouth is set to a specified value and the machine automatically stops.

At this stop position, the length of the material 4 is measured, and the data is sent to the central processing unit CPU. Then, the position detector DS calculates the center of gravity of each image of the last day a and the original Db, and the central processing unit CPU calculates the distance between the center on the television camera and the above-mentioned center of gravity based on this data. is output to the control device 3 as the position correction data of the V loader 5, so the control device 3 adjusts the adjustment means 9.10 of the loader 5.
is activated, and the position of the material 4 is adjusted so that the center of gravity of each end of the material 4 coincides with the center of the television camera, as shown on the left side of FIG. When the center of gravity of the wood end and the center of the television camera 1 coincide in this way, the central processing unit CPU receives the area data of the end end a and the end end a from the position detector DS, and calculates the diameter of the material 5 from the average value. This determines the diameter class of the material. Once the grade is determined, the central processing unit CPU
selects an appropriate one from the memorized wood cutting patterns p, superimposes it on the original image on the monitor TV M-cho, and displays each cutting position from the center of the material as shown in Figure 4. Dimensions of the center side of ■1. , + ,
Calculate the cutting length at L2, and calculate this cutting length, 1. L2
is multiplied by the cutting width m of the saw 13.13 to calculate the cutting area, further this cutting area is multiplied by a coefficient to calculate the control value for the material feeding speed, and this control value is sent to the control device 3 via the input/output interface IF2. At the same time as outputting, V loader 5 h-
The material 4 is transferred to the material feeding device 11/\ as shown on the right side of Fig. 2.
Since the material is to be transferred, the control device 3 sets the rotational speed of the motor 12 that drives the material feeding device 11 based on this control value, advances the material feeding device 11 at the optimum speed for the cutting area of the material 4, The material 4 is sent to the saw 13/\ to perform lumbering under ideal conditions. Table 1 shows the relationship between the cutting length of the material and the material feeding speed by this device.

The values listed in Table 1 are based on the most standard saw condition and material type, so they may need to be corrected if the saw condition or material type changes. Since this correction can be made by changing the coefficient multiplied by the cutting area, by adjusting the coefficient within the range of ±25% using a coefficient adjustment means using a variable resistor, etc., the fluctuation within the normal range of change can be corrected. The factors are thereby corrected and a more or less consistent sawn result can be obtained.

Fig. 6 to Fig. 9 show an example of applying a device using an encoder to a material transport type band saw machine.
Basically, it is composed of a mobile rotary encoder 15, a travel speed control value calculation device 16, and a control device 17.
As shown in the figure, when the guide 18 is raised and lowered by the electric lifting means 19G and raised and lowered along the cutting part of the material 4, that is, along the grinding path C1 shown in FIG. The fixed rack 22 is rotated to emit pulses, and unless this pulse is emitted only within the range of the cutting path C1, the accurate length of the cutting path C1, that is, the cutting length cannot be detected. In combination with the detector 23 of the trail C1, when this detector 23 detects, for example, the upper end of the trail C1, the rotary encoder 15 is turned on.
When the lower end 1 is detected, the rotary encoder 15 is turned off so that accurate pulse conversion of the track C1 is performed. Since it will interfere with sawn timber, lift guide 1
8 is supported by a reciprocating means 24 that reciprocates within a specified range as shown in FIG. I will make it possible for you to do so.

The traveling speed calculation device 16 receives information on the cutting length detected as the number of pulses by the rotary encoder 15 and digitized by the counter 25, multiplies this information by a coefficient selected by the coefficient selection device 26, and calculates a value suitable for the cutting length. A control value for the material feeding speed is calculated and outputted to the control device 17/\ for speed adjustment.

The coefficient selection device 26 uses a device similar to that described in the above embodiment, and changes the coefficient depending on the state of the saw or the type of material.
Correct the traveling speed.

Based on the 2 output G of the material feeding speed control value calculation device 16, the control device 17 adjusts the rotational speed of the driving motor 28 of the material feeding vehicle 27 that loads and sends the material 4, and lifts and lowers the rotary encoder 15 described above. The means 19 and the reciprocating means 24 are actuated using a known sequencer or a microcomputer, as in the previous embodiment.

In the apparatus shown in the embodiment, when the material 4 is loaded on the material transport vehicle 27 as shown in FIG. is positioned at the cutting site as shown in the figure, and accordingly, the elevating means 19 lowers the rotary encoder 15 and the road detector 23, and the detector 23 detects the ground road C.
When the upper end of the counter 1 is not detected, the rotary encoder 15 is turned on, and when the lower end is not detected, the rotary encoder 15 is turned off.
5, the cutting length is input as a number of pulses, and the counter 25 converts this pulse into a numerical value and inputs it to the traveling speed calculation device 16. Then, the traveling speed control value calculation device 16 multiplies the input numerical value by the cutting width of the saw 29, which is stored in advance, to obtain the cutting area, and further multiplies the obtained area value by a coefficient to calculate the material feeding speed control value. Since this speed control value is output to the control device 17, the control device 17 controls the feed vehicle 27 based on the control value.
The rotational speed of the motor 28 that drives the material transport vehicle 27 is adjusted.
The material 4 is fed at the optimum speed for the cutting area by advancing the material 4, and the saw 29 is used to saw the material under ideal conditions. shall be determined in accordance with Table 1.

FIGS. 10 to 13 and FIG. 22 show an embodiment of a device using a rotary encoder for a table-type band saw machine and a circular saw machine. , traveling speed control value calculation device 16,
This embodiment is similar to the material transport vehicle embodiment described above in that the control device 17 is used. However, there are limitations to how the rotary encoder 15 is used. That is, the rotary encoder 1 of this embodiment
5 is a table 30 as shown in FIGS. 10 and 11.
Either it is attached to the support member 32 of the press roller 31 that presses the material 4 to the shaft 33 so that the rotational movement of the swinging arm 34 that supports the press roller 31 is transmitted to the shaft 33, or as shown in FIGS. As shown in FIG. 13, the shaft 33 and the hennion 35 are fixed, and the rack 38 provided on the elevating shaft 37 of the presser roller 36 is engaged with this hennion 35, so that the material 4 supplied onto the table 30 is transferred to the presser roller 31. , 36 are pushed up, the encoder 15 is rotated, and a pulse corresponding to the pushing up dimension of the rollers 31, 36, that is, the cutting length is transmitted. However, the counter 25 receives subsequent pulses and converts them into numerical values, and the calculation of the cutting area and the control value of the material feeding speed suitable for this cutting area are performed based on the numerical values and the coefficients selected by the coefficient selection device 26. A device 16, based on the output of this arithmetic device 16, adjusts the rotational speed of the motor 40 that drives the presser roller 31 shown in FIGS. 10 and 11, which also serves as feed, or the feed roller 39 shown in FIGS. 12 and 13. However, the material 4 is sent to the band saw 41 or the circular saw 42 at the optimum speed for the cutting length, and the point of cutting the material is the same as in the embodiment of the band saw machine with the material feed wheel type described above. Explanation regarding this will be omitted.

Figures 14 to 17, Figures 23, and 25 show examples of applying a device using a synchro transformer to a table-type band saw machine and a circular saw machine. is a synchro transformer 43 and a material feeding speed control value selection setting device 44
and a control device 45.The synchro transformer 43 is attached to the support member 32 of the presser roller 31 that presses the material 4 onto the table 30, and the shaft 4
6, as shown in FIGS. 14 and 15, or the rotational movement of the swinging arm 34 supporting the presser roller 31 is transmitted to the presser roller 31 as shown in FIGS. 16 and 17. A rack 38 is provided on the lifting shaft 37 of 36, and this rack 3
When the material 4 fed onto the table 30 pushes up the presser rollers 31 and 36, the synchro transformer 43 rotates. Push-up of roller 31, 36 1t:
) Generates a voltage according to the dimensions, that is, the cutting length of the material.

The feeding speed selection and setting device 44 selects an appropriate control value from preset stepwise material feeding speed control values according to the change in voltage generated by the synchro transformer 43, and controls the controller 4
For example, the first stage is 10 m/min, the second stage is 20 m/min, the third stage is 30 m/min, and the fourth stage is 50 m/min.
/minute, and the configuration is such that the lower the voltage generated by the synchro transformer 43, the larger the control value is selected and output, and the higher the voltage, the smaller the control value is selected and output.

The control device 45 causes the presser roller 31 shown in FIGS. 14 and 15, which also serves as feed, to control the feed roller 39 shown in FIGS. It adjusts the rotational speed of the driving motor 40, and as mentioned above, a known sequencer or microcomputer is used.

In the apparatus of this embodiment, the synchro transformer/13 generates different voltages depending on the cutting length of the material 4 supplied onto the table 30, and the voltage value t is preset as shown in FIG. This implementation selects and outputs the appropriate control value from among the stepwise material feeding speed control values, and causes the rollers 31, 39, etc. to feed the material to the band saw 41, circular saw 42, etc. at an appropriate speed. In this example, lumber was able to be sawn under ideal conditions.

18 to 21, FIG. 23, and FIG. 26 show embodiments of a table-type band saw machine and a circular saw machine using switches, and this embodiment basically consists of a plurality of switches S.
I to S4 and the same number of material feeding speed control value selection setters]
1 to 1 and a control device 47, and the detection switches 81 to S4 are known limit I switches, photoelectric switches, etc., which perform detection operations upon contact or approach of the operator 48. When the presser roller 36 for the material 4 is supported by the swinging arm 344 as shown in FIGS. When the presser roller 36 is supported by the lifting shaft 37 as shown in FIGS. 20 and 21, the operator 48 housed in the lifting shaft 37 is The presser rollers 31 and 36 are pushed up by supplying the material onto the daple 30 to rotate the swinging arm 34, or the lifting shaft 37 is moved up and down by -L. When the operator 48 is moved by shaking it, different detection switches are activated depending on the moving distance G and output a detection signal.

The material feeding speed control value selection setting device "r, ~1"4 sets the required material feeding speed control value as in the above embodiment. The third stage is set at 30 m/min, and the fourth stage is set at 50 m/min in four stages.The same number of detection switches as described above are used, and the maximum control value, that is, the highest speed setting device T, is set at the lowest position. The detection switch S is then connected to the detection switch at a higher position as the control value, that is, the speed is reduced, to the detection switch Sl-.S4
]-9, and the smaller the cutting length of the material 4 supplied onto the table 30, the larger the control value, that is, the speed value, is selectively output.

The control device 46 includes transmission N speed control value selection and setting devices 1-1.
Based on the control value output by T4, the presser roller 31 shown in FIGS. 18 and 19, which also serves as feed, adjusts the rotational speed of the motor 40 that drives the feed roller 39 shown in FIGS. 20 and 21. As mentioned above, a sequencer or a microcomputer is used.

In the apparatus of this embodiment, different detection switches are activated depending on the cutting length of the material 4 supplied onto the table 30.
As shown in FIG. 26, the material feeding speed control value corresponding to this is selected and outputted, the rotational speed of the motor 40 is adjusted based on this value, and the material 4 is fed at an appropriate speed. Even in this case, lumber could be sawn under ideal conditions.

Effects of the Invention The apparatus according to the present invention automatically determines the cutting length of the supplied material, sets a material feeding speed suitable for this, and controls the material feeding device according to the set speed. By eliminating the manpower required for these tasks, it is possible to achieve complete unmanned lumber and wood removal operations.

Since the speed of material feeding by the material feeding device is set based on the cutting length of the material detected by the detection means, the material feeding speed is always set at the optimum speed for the cutting length, achieving overall accuracy, efficiency, and tool durability. It is now possible to perform sawmilling, wood removal, etc. under ideal conditions to obtain satisfactory results.

It has unique effects such as

[Brief explanation of drawings]

The drawings show an embodiment of an apparatus according to the present invention, and FIG. 1 is a plan view showing an embodiment of the apparatus using image processing in a twin bandsaw machine. FIG. 2 is a front view showing a state in which the cutting length of the material is measured on the loader and then transferred to the material feeding device. FIG. 3 is an illustrative diagram of the wood cutting pattern in the same as above. FIG. 3 is an illustrative diagram of the cutting length measurement state. FIG. 5 is a block diagram showing the basic configuration of the same as above. FIG. 6 is a front view showing an embodiment of a device using a rotary encoder applied to a feed wheel type band saw machine. Figure 7 shows the operation of the rotary encoder #! An enlarged cross-sectional view of a portion showing a yang. FIG. 8 is an illustrative diagram of the ground path and cutting length measured by the same method as above. FIG. 9 is a block diagram that does not show the basic configuration of the same as above. FIG. 10 is a side view showing an embodiment of a table band saw machine using a rotary encoder. Figure 1 is a 1 [: side view of the same 1-. FIG. 12 is a longitudinal sectional side view showing an embodiment of a table-type circular saw machine l\, which is an apparatus using a rotary encoder. FIG. 13 is a front view of the same. FIG. 14 is a side view showing an embodiment of a table type band saw machine l\, which is an apparatus using a synchro motor. FIG. 15 is a front view of the same as above. FIG. 16 is a longitudinal sectional side view showing an embodiment of a table-type circular saw machine using a synchronized motor. Figure 17 is a top view of the same. FIG. 18 is a side view showing an embodiment of a device using a switch to a difle-type band saw machine. FIG. 19 is a front view of the same 11. FIG. 20 is a longitudinal sectional side view showing an embodiment of a table-type circular saw machine 31\ which is a device using a switch. FIG. 21 is a front view of the same as above. FIG. 22 is a block diagram showing the basic configuration of an embodiment of a table-type band saw machine and a table-type circular saw machine using a rotary encoder. FIG. 23 is a block diagram showing the basic configuration of an embodiment of a table-type band saw machine and a table-type circular saw machine using a synchronized motor. FIG. 24 is a block diagram showing the basic configuration of an embodiment of a table-type band saw machine and a table-type circular saw AL\, which are devices using switches. FIG. 25 is a block diagram showing the control value step setting method in FIG. 23. FIG. 26 is a configuration diagram that does not show the stepwise setting method of the control value in FIG. 24. 4; Material, 1, 15.43. S, ~S4], 1
5.43. S, -84: Detection means 2, 1B, 44
．． T', ~]゛4: Means 3 for determining material feeding speed control value, 17.44.46 + controller

Claims (1)

[Claims] A means for detecting the cutting length of the workpiece, a means for determining an appropriate control value for the material feeding speed based on the detected cutting length, and a means for controlling the material feeding device based on the obtained control value to set the appropriate speed. 1. A device for automatically setting a material feeding speed by detecting a cutting length.