JPH0815721B2 - Sawing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a saw machine for sawing a plate-shaped body such as plywood, flash, hard board, and plastic board with a saw.

[0002]

2. Description of the Related Art In a conventional saw machine, since the operator cannot see the saw, the operator often operates the buttons on the operation panel to locate the saw outside the plate while looking into the back side of the table. It was adjusted so that it would not cut the plate suddenly. The adjustment is very troublesome, and often the operator forgets to adjust the position of the saw and cuts the plate material from the middle, resulting in defective products.

In order to eliminate such inconvenience, there is an invention of a lifting type circular saw machine equipped with an inclined table, which is a kind of saw machine. That is, the actual Kaihei 3-55201
The plate material cutting device shown in Fig. 1 has a vertically elongated hole forming a cutter passage, a cutting head slidably mounted on a slide rail, and a light beam provided at a position below the cutter of the cutting head on a standing table having an inclination angle for leaning the plate material. A sensor is provided, a control unit that raises and lowers the cutting head according to a signal from the optical sensor is provided, and a slit is provided on the standing table along the moving direction of the optical sensor. Therefore, it is not necessary to perform troublesome confirmation work of repeatedly raising and lowering the cutting head while looking into the back side of the standing table, and the plate-shaped body is never defective due to mistakes in the confirmation work, and the cutting work time is shortened. It came to be.

[0004]

However, in the above prior art, since there is a structural material (framework) for supporting on the back side of the standing table, each slit has to be discontinuous, so that the optical sensor However, a dead zone where the plate-shaped body cannot be detected occurs. Therefore, when the upper end of the plate-shaped body is located in the dead zone, the optical sensor continues to output a detection signal even if it passes through the upper end of the plate-shaped body. It took an extra time for the cutting work. Further, if a vertically thin plate-like body is arranged in the dead zone between the slits, it becomes impossible to detect the plate-like body at all. Further, in addition to the vertically long hole forming the cutter passage, slits are purposely provided on both sides of the hole and two optical sensors are provided, so that the manufacturing process has to be troublesome and an additional manufacturing cost is required. It will be.

Therefore, an object of the present invention is to eliminate the dead zone of the plate material detection sensor and to reliably detect the plate-shaped body, and also to detect the plate-shaped body having a vertically thin shape.
An object of the present invention is to provide a saw machine with a wide range of application, which can reduce the manufacturing process and manufacturing cost.

[0006]

In order to achieve such an object, the present invention provides a table and a continuous drilling on the table.
Slits that are cut and saws and plate-like objects provided on the table
Guide ruler to guide the
And a saw that can move along the saw path to cut the plate.
A saw unit including a saw rotation motor for rotating the saw.
And to determine the presence or absence of a plate-shaped member arranged in the saw unit.
A plate-shaped body presence / absence detection sensor for detecting a plate-shaped body detection signal;
Moving the saw unit along the table
Saw unit moving mechanism with drive source with variable rotation speed
And a rotation detection signal indicating rotation data of the drive source is detected.
Rotation data detection sensor and the plate-like body presence / absence sensing sensor.
From the plate-like object detection signal and rotation data detection sensor
Based on the rotation detection signal and the cutting speed of the saw,
At a high speed, return the saw unit in the opposite direction to the cutting direction.
The drive signal is supplied with a control signal for stopping outside the plate.
The present invention is directed to a saw machine characterized by having a control circuit for outputting to .

[0007]

[0008]

According to the present invention, since the plate-like body detecting sensor can move along the continuous slit, the dead zone of the plate-like body detecting sensor can be eliminated, and the plate-like body can be surely detected. Can prevent the rise of extra saw. It is also possible to detect a vertically thin plate-shaped body. Furthermore, the slit serves as both the saw path and the material sensing slit, and only one sensor is required.
The manufacturing process and manufacturing cost can be reduced. Further, the saw blade has a wide range of application, and thus has high industrial utility value.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A saw board 1 according to a first embodiment of the present invention will be described below with reference to FIGS. First, the mechanical configuration of the first embodiment will be described with reference to FIGS. As shown in FIGS. 1 to 3, in order to maintain stability, the table 2 is erected at an angle of 7 ° to 8 ° with respect to the vertical, and the vertical slit 3 is formed in the table 2, and the surface of the table 2 Vertical slit 3
A plate material pressing mechanism 4 is vertically arranged so as to cover the plate material, and a plate material 5 such as a veneer board to be cut can be pressed and fixed from above,
Or it can be released. Vertical plate pressing mechanism 4
Is equipped with a hydraulic cylinder 6 and an operation button portion 7, is made of two layers in terms of material, and the front half is made of metal,
The back half is made of felt, and the felt part has a saw 1
A vertical slit 8 through which 5 passes is provided at the center in the vertical direction.

As shown in FIG. 4, when the plate material 5 is pressed by the plate material pressing mechanism 4, the vertical slit 3 and the vertical slit 8 and the portion between them are in a slit shape perpendicular to the table 2. Forming a saw path 9. When the plate material 5 is pressed, the plate material 5 exists between the vertical slits 3 and the vertical slits 8, and the circular saw 15 described below descends the saw path 9 to cut the plate material 5. It is. The plate material holding mechanism 4 is a circular saw 1
It also serves as a cover to prevent the 5 from being exposed and improves safety. Further, a horizontal ruler 10 is provided on the table 2 to support the plate member 5 from below, and the horizontal ruler 10 is perpendicular to the saw blade. On the back surface of the table 2, the saw unit 11 is provided so as to be movable along the slide rail 12 in the arrow Z direction of FIG. As shown in FIG. 4, the saw unit 11 includes a frame 13, a dust collecting cover 14 fixed to the frame 13 and provided with a duct 14a, a circular saw 15 housed in the dust collecting cover 14, and a circular saw 15. The saw rotating motor 16 that is connected to rotate the circular saw 15, and the circular saw 15 and the saw rotating motor 16 alone are relatively shown in FIG.
The pneumatic cylinder 17 is moved in the direction of arrow Y. Further, the circular saw 15 can move in parallel along the saw path 9, and the state in which the circular saw 15 has advanced is shown by a dotted line.

As shown in FIG. 3, the saw unit 11 and the slide rail 12 are also arranged so as to be inclined, corresponding to the table 2 being provided so as to be inclined. Further, the lifting motor 18 that rotates at a constant speed drives the drive chains 19 and 20, and as a result,
The saw unit 11 can be moved up and down along the slide rail 12.

As shown in FIG. 5, four sliders 13 a are attached to the frame 13, hold the slide rail 12, and can move along the slide rail 12. The saw rotation motor 16 is connected to the rotation shaft 16b via a belt 16a. Therefore, the circular saw 15 is rotated by the rotating shaft 16b, and the frame 13 is moved up and down by the drive chain 19.

Next, the control system of this embodiment will be described. The foot pedal 21 of FIG. 1 and FIG.
Is raised and controlled to a position above the upper end of the plate member 5 (a position adjacent to the upper end) to prevent the plate member 5 from being cut midway. As shown in FIGS. 4 and 5, the optical sensor 30 is fixed to the lower end of the saw unit 11 and can be raised and lowered integrally with the saw unit 11. The optical sensor 30 is arranged so as to be able to move along the vertical slit 3, and the light beam irradiating the vertical slit 3 hits an object, and the presence or absence of the plate 5 can be sensed by the intensity of the reflected light. ing. The optical sensor 30 outputs a plate material detection signal to the electronic control unit 31 shown in FIGS. 1 and 2. Therefore, since the optical sensor 30 can be moved along the continuous vertical slit 3, the dead zone of the optical sensor 30 can be eliminated, the plate material 5 can be detected reliably, and an extra portion as described later is provided. You can prevent the saw from rising. Also,
It is also possible to detect the vertically thin plate member 5. Further vertical slit 3
Uses both the saw path and the material sensing slit, and only one optical sensor 30 is required, so that the manufacturing process and manufacturing cost can be reduced.

The electronic control unit 31 shown in FIG. 6 basically comprises a CPU 32, a RAM 33 and a ROM 34. A program for controlling the CPU 32 is written in the ROM 34, and the CPU 32 fetches external data required from the input port 35 in accordance with the program or exchanges data with the RAM 33 to perform arithmetic processing. However, the data processed as necessary is output to the output port 36. The output port 36 sends the data to D /
Output to the A converter 37, and the D / A converter 37
D / A conversion is performed, and the analog signal is converted into a pneumatic cylinder 6, a saw rotation motor 16, a pneumatic cylinder 17, and a lifting motor 18.
Is output to.

The electronic control unit 31 receives a plate material pressing button chin-on signal or an off signal and an end signal from the operation button section 7, and a foot pedal detection signal from the foot pedal 21.
Based on an input signal such as a plate material detection signal from the optical sensor 30, a predetermined calculation is performed and various control signals are output to the pneumatic cylinder 6, the saw rotation motor 16, the pneumatic cylinder 17, and the lifting motor 18. is there. Details are as follows. When the plate material pressing button of the operation button section 7 is pressed, a plate material pressing button ON signal is generated, a plate material pressing signal is output from the electronic control unit 31 to the pneumatic cylinder 6, and the plate material pressing mechanism 4 suppresses the plate material 5. ing. On the other hand, when the plate material release button of the operation button unit 7 is pressed, a plate material release button ON signal is generated, the plate material release signal is output from the electronic control unit 31 to the pneumatic cylinder 6, and the plate material pressing mechanism 4 is separated from the plate material 5. However, the plate member 5 can be moved.
When the saw rotation signal is output from the electronic control unit 31 to the saw rotation motor 16, the saw rotation motor 16 and the circular saw 15 are rotated. On the other hand, when the saw rotation stop signal is output, the saw rotation motor 16 and the circular saw 15 are stopped. When a saw-out signal is output from the electronic control unit 31 to the pneumatic cylinder 17, the pneumatic cylinder 17 causes the circular saw 15 and the saw rotation motor 1 to operate.
6 is moved to the left side in the Y direction in FIG.
When the saw retract signal is output to the pneumatic cylinder 17, the pneumatic cylinder 17 can be cut.
Moves the circular saw 15 and the saw rotation motor 16 to the right in the Y direction of FIG. 4, so that the circular saw 15 is retracted from the saw path 9 and is housed in the dust collecting cover 14. When a lowering signal is output from the electronic control unit 31 to the lifting motor 18, the saw motor 11 is lowered by the rotation of the lifting motor 18. On the other hand, a lift signal from the electronic control unit 31 is sent to the lifting motor
Is output, the saw unit 11 is raised by the rotation of the lifting motor 18. When a lift stop signal is issued from the electronic control unit 31, the rotation of the lift motor 18 is stopped,
The saw unit 11 stops. Further, the electronic control unit 31 is provided with a timer 38 for measuring the cutting time T from the start of cutting the plate material 5 to the completion of cutting, and the data showing the measured cutting time T is stored in the RAM 33. .

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, place the plate material 5 on the table 2 so as to cover the vertical slit 3 and press the plate material pressing button.
A plate presser button ON signal is generated and YES in step 1
The pneumatic cylinder 6 is driven based on the plate material pressing signal, and the plate material pressing mechanism 4 presses the plate material 5 to move the table 2
(Step 2). When the foot pedal 21 is stepped on, a foot pedal detection signal is generated, and in step 3, Y
It is determined to be ES, and it is determined whether the optical sensor 30 is in the middle of the plate 5, that is, whether the plate detection signal is at a low level (step 4). Y in step 4
If ES, that is, the plate material detection signal is at a low level and it is determined that the plate material optical sensor 30 is in the middle of the plate material 5, the height of the saw unit 11 is controlled (step 5). That is, the electronic control unit 31 generates a rising signal to rotate the lifting motor 18 to lift the saw unit 11. Then, when the position of the optical sensor 30 reaches a position beyond the upper end of the plate member 5, since the plate member 5 does not exist there, light enters from the vertical slit 3. Therefore, a high level plate material detection signal is generated from the optical sensor 30, a lift stop signal is generated, the rotation of the lift motor 18 is stopped, and the saw unit 11 is stopped. In this way, the saw unit 11 is always controlled to be positioned above the upper end portion of the plate member 5 as a pre-stage of the cutting operation. On the other hand, if NO in step 4, that is, if the plate material detection signal is at a high level and it is determined that the optical sensor 30 is at the position above the upper end of the plate material 5, the height of the saw unit 11 is controlled (step 5). ) Is not necessary, so it will not be done.

When it is judged NO in step 4 or when the process of step 5 is completed, the plate material 5 is cut by the circular saw 15 (step 6). That is, the circular saw 15 and the saw rotation motor 16 are moved by the saw-out signal,
The circular saw 15 is pushed out of the dust collecting cover 14 and advanced to the saw path 9. Next, the saw rotation signal causes the saw rotation motor 16 to rotate and the circular saw 15 to rotate. Then, the raising / lowering motor 18 is rotated by the descending signal, and the saw unit 1
Since 1 descends and the circular saw 15 descends along the saw path 9 while rotating, the plate material 5 is cut by the circular saw 15. Here, at the same time when the falling signal is generated, the timer 38 starts measuring time (step 7). This is the plate material 5 described later.
When the saw unit 11 rises and returns to the original position after cutting, the plate member 5 has already been cut, so the optical sensor 30 outputs a plate material detection signal at a high level, and the upper end of the plate member 5 cannot be detected. Is. Therefore, the cutting time is measured and the saw unit 1
If 1 is raised, it can be returned to the initial position, and the saw unit 11 can be prevented from being raised excessively. Next, the plate member 5 is cut, and the optical sensor 30
When the light beam descends and passes the lower end of the plate material 5, the light sensor 30 is exposed to light, so that a high level plate material detection signal is generated, and it is determined that the circular saw 15 has finished cutting the plate material 5,
In step 8, YES is determined. At the same time, the timer measurement ends, and data indicating the cutting time T required for cutting is stored in the RAM 33.

Then, the rotation of the circular saw 15 and the rotation of the lifting motor 18, that is, the lowering of the saw unit 11 are stopped by the saw rotation stop signal and the lifting stop signal (step 9). Next, the circular saw 15 and the saw rotation motor 16 are moved by the saw retract signal, the circular saw 15 is housed in the dust collecting cover 14 and retracted from the saw path 9. Next, during the time T, the raising / lowering motor 18 is rotated by the raising signal to raise the saw unit 11 and return to the initial position determined in step 5 (step 9). If the end button is not pressed, NO is determined in step 10, the process returns to step 1 and the above operation is repeated. Therefore, it is not necessary to confirm the position and adjust the position of the saw unit 11, and the saw unit 11 does not need to adjust the plate material 5.
Can be automatically cut from the upper end, and even if plate members 5 having different heights are processed one after another, the problem that the plate members 5 are cut from the middle does not occur. When the end button is pressed, YES is determined in step 10 and the disconnection process ends.

A saw board according to a second embodiment of the present invention will be described with reference to FIGS. The mechanical configuration of the second embodiment is such that the lifting motor 18 of the first embodiment is configured as an inverter motor to enable variable speed operation. That is, in order to make the saw unit 11 rise faster after cutting the plate material 5, the saw unit 11 rise speed is set faster than the saw unit 11 fall speed (cutting operation). . Since the second embodiment has a lot in common with the first embodiment, for the sake of convenience, only the points of difference in configuration and action will be described, and the description of the common points will be omitted.

As shown in FIG. 8, a rotation speed sensor 40 is arranged close to the lifting motor 18. Revolution sensor 4
0 is a pickup 41 and an optical sensor 42. The pickup 41 is connected to its rotating shaft so as to rotate synchronously with the lifting motor 18, and is provided with protrusions 41a at the four corners of a square plate. Optical sensor 4
2 catches the protrusion 41a, so that the lifting motor 1
The rotation speed N of 8 is detected. The more the number of the protrusions 41a is increased, the more accurately the rotational speed N can be detected. Here, the rotation speed N is the number of times that the rotation axis has rotated from the start of measurement to the end of measurement.

In the block diagram of the electronic circuit of the second embodiment, the rotation speed sensor 40 in FIG. 6 of the first embodiment is additionally connected to the input port 35, and the rotation speed signal is input port 35. Via electronic control unit 31
Since only the input to the above is added, the illustration is omitted.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. Since Steps 11 to 15 are exactly the same as Steps 1 to 5 of the flowchart of FIG. 7 of the first embodiment, description thereof will be omitted, and the processing of Steps 16 to 21 peculiar to this embodiment will be omitted. explain. First, the plate material 5 is cut by the circular saw 15 (step 16). That is, the circular saw 15 and the saw rotation motor 16 are moved forward by the saw-out signal, and the circular saw 15
Is ejected from the dust collecting cover 14 and advanced to the saw blade 9. The saw rotation signal causes the saw rotation motor 16 to rotate and the circular saw 15 to rotate. The raising / lowering motor 18 is rotated by the descending signal and the saw unit 11 is lowered, so that the plate material 5 is cut by the circular saw 15. During the cutting, the rotation speed sensor 40 measures the rotation speed N indicating how many times the rotation shaft of the lifting motor 18 has rotated (step 17). This is because the rotation time T of the lift motor 18 was measured in the first embodiment, but in the second embodiment, the rotation speed at the time of rising is higher than the rotation speed at the time of falling, so that it is the same as in the first embodiment. This is because the saw unit 11 rises excessively in measuring the rotation time T, which causes a problem. When the optical sensor 30 passes the lower end of the plate material 5, a high-level plate material detection signal is generated, and it is determined that the circular saw 15 has finished cutting the plate material 5, and YES is determined in step 18. At the same time, the measurement of the rotation speed N is completed, and the data indicating the rotation speed N required for such cutting is stored in the RAM 33. Then, the rotation of the circular saw 15 and the rotation of the lifting motor 18, that is, the lowering of the saw unit 11 are stopped by the saw rotation stop signal and the lifting stop signal, and the circular saw 1 is stopped by the saw retract signal.
5 and the saw rotation motor 16 are moved so that the circular saw 15 is housed in the dust collecting cover 14 and retracted from the saw path 9 (step 19).

At the same time when the lifting motor 18 starts to rotate and the saw unit 11 starts to rise, the rotation speed sensor 40 starts measuring the rotation speed N'and the rotation speed N measured at the time of the lowering.
By rotating the lifting / lowering motor 18 until the same rotation speed as the above, the saw unit 11 can return to the height controlled in step 14 and stop (step 20). Here, the lift motor 18, which is an inverter motor, changes the rotation speed by changing the frequency. The frequency is higher during the lowering (disconnection) and higher than the frequency f during the rising (returning). Since the engine is driven at f ', the rotation speed when rising is higher than the rotation speed when falling. Therefore, the saw unit 11 can be quickly returned to the original position.
If the end button is not pressed, NO is determined in step 21, the process returns to step 11, and the above operation is repeated. Therefore, even if the rising speed and the falling speed of the saw unit 11 are different, it is possible to quickly and accurately return to the initial position. When the end button is pressed, YES is determined in step 21 and the process ends.

Needless to say, those skilled in the art can appropriately change the configuration of the present invention without departing from the scope of the present invention, and since such a change has the same technical idea, it is included in the present invention. Will be done. In Step 7 of FIG. 7 of the first embodiment, the time T is measured by the timer and the lifting motor 18 is driven for the time T in Step 9, but instead of that, the rotation speed of the lifting motor 18 is changed. May be detected, and the lifting / lowering motor 18 may be controlled based on that. Further, in step 17 of FIG. 7 of the second embodiment, the rotation speed N is measured, and in step 20, the lifting motor 1 is moved by the rotation speed N.
8 is being driven, but instead of that, a lifting motor 1
It is also possible to calculate the rising time from the frequency and the falling time of 8 and control the lifting motor 18 based on the calculated rising time. Furthermore, a saw-in / out manual switch or a saw unit elevating / lowering switch may be provided to control the saw in / out and the saw unit elevating / lowering by button operation. In the example, the case of only cutting was described, but it is natural that it can be applied to hair pulling etc.Also, in the example, a plate material such as a veneer board is cut, but a plate-like body such as a flash or a plastic is cut. It is natural to be able to disconnect. Further, instead of the optical sensor 30, an air sensor that ejects air may be used to detect the presence or absence of the plate material in the ejection direction.

Further, in the present embodiment, the lifting circular saw machine having the pressing mechanism on the inclined table is used, but it can be widely applied to other types of saw machines such as a traveling circular saw machine having a horizontal table. It will be obvious to those skilled in the art.

[0026]

As described above, according to the present invention, since the plate-shaped body detecting sensor can move along the continuous slits forming the saw path, the dead zone of the plate-shaped body detecting sensor is eliminated and the plate-shaped body detecting sensor is eliminated. The body can be reliably detected, and even a thin plate-shaped body can be detected. Further, since the slit serves as both the saw path and the material sensing slit, and one sensor is sufficient, the configuration is extremely simple, and the manufacturing process and manufacturing cost can be reduced.

Further, according to the present invention, after the cutting of the plate-like body by the saw unit, the saw unit is returned at a speed higher than the cutting speed, so that the cutting operation can be further speeded up. Become.

Further, the present invention can be applied to many kinds of saw machines, and its industrial utility value is extremely large.

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment.

FIG. 2 is a view showing a plate material holding mechanism 4 and a plate material 5 in the first embodiment.
It is a front view which removed and made the vertical slit 3 visible.

FIG. 3 is a right side view of the first embodiment.

FIG. 4 is a perspective view showing a saw unit and its surroundings when the first embodiment is viewed from the back side.

FIG. 5 is a front view showing the saw unit and its surroundings when the table 2 and the plate material pressing mechanism 4 of the first embodiment are removed.

FIG. 6 is a block diagram of an electronic circuit of the first embodiment.

FIG. 7 is a flowchart of cutting a plate material according to the first embodiment.

FIG. 8 is a perspective view showing a rotation speed sensor and its periphery according to a second embodiment.

FIG. 9 is a flowchart of cutting a plate material according to a second embodiment.

[Explanation of symbols]

 1 Saw machine 2 Table 3 Vertical slit 4 Plate material holding mechanism 5 Plate material 6 Pneumatic cylinder 7 Operation button part 8 Vertical slit 9 Saw path 11 Saw unit 12 Slide rail 15 Saw 16 Saw rotation motor 17 Pneumatic cylinder 18 Elevating motor 21 foot pedal 30 optical sensor 31 electronic control unit 40 rotational speed sensor

Claims (1)

[Claims] 1. A table and continuous drilling in the table
Slits that are cut and saws and plate-like objects provided on the table
Guide ruler to guide the
And a saw that can move along the saw path to cut the plate.
A saw unit including a saw rotation motor for rotating the saw.
And to determine the presence or absence of a plate-shaped member arranged in the saw unit.
A plate-shaped body presence / absence detection sensor for detecting a plate-shaped body detection signal;
Moving the saw unit along the table
Saw unit moving mechanism with drive source with variable rotation speed
And a rotation detection signal indicating rotation data of the drive source is detected.
Rotation data detection sensor and the plate-like body presence / absence sensing sensor.
From the plate-like object detection signal and rotation data detection sensor
Based on the rotation detection signal and the cutting speed of the saw,
At a high speed, return the saw unit in the opposite direction to the cutting direction.
The drive signal is supplied with a control signal for stopping outside the plate.
And a control circuit for outputting to a saw.