JPH07227802A - Automatic material feed device of wood working machine - Google Patents

Abstract

PURPOSE:To ensure that the work feed capacity of a work to be increased automatically without damaging the material by driving a wood feed part by a drive amount set for increasing a work feed capacity by a control part based on a signal from a redrive switch, narrowing a distance to the wood feed part. CONSTITUTION:A table 3 on which a material to be wrought 6 is deposited, is attached to an area where the bad saw 5 of a band saw part 1 is exposed and at the same time, an automatic work feed device 2 is also installed in the same area. In addition, the automatic work feed device 2 is composed of a lift mechanism part 7, a board thickness detection part 8, a work feed part 9 and a control part. Further, a lift drive part 14 lowers the work feed part 9 until the board thickness detection part 8 comes into contact with the work 6 and thereby adjusts the space of a work feed passage formed between the work feed part 9 and the table 3. In this case, the work feed part 9 is stopped by detecting the board thickness of the work 8 using the board thickness detection part 8. A lift drive part 14 drives the work feed part by a drive amount for increasing a work feed power set by the control part based on a signal from a redrive switch and thereby narrows the space of the work feed passage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of an automatic material feeding device for feeding a material to be cut provided on a wood working board.

[0002]

2. Description of the Related Art Conventional wood processing machines include band saw machines, plane machines,
There are some grooving machines that are equipped with an automatic material feeder. Among them, for example, a band saw blade is circulated and rotated with respect to a table, which is a surface plate, and a workpiece is processed along a ruler arranged on the table. There is a woodworking band sawing machine that has an automatic material feeder that automatically transfers and cuts material. This automatic material feeder is
It is common to arrange them at the front and rear positions in the material feeding direction with respect to the band saw blade, and to mount the material feeding portion so that it can move up and down in the vertical direction.

In the material feeding section of the automatic material feeding device, a material to be processed is placed on a table which is a surface plate, and when an operator operates a switch or the like to instruct, the material automatically descends from the upper standby position. When the sensor of the plate thickness detection unit of the automatic material feeder contacts the upper surface of the material to be processed and detects its position, the limit switch operates to stop the lowering operation of the material feeder.

Next, while cutting the workpiece with a band saw blade,
In the material feeding unit having the feed roller of the automatic material feeding device, the material to be processed on the table is automatically transported along the ruler to perform the cutting work.

[0005]

In the conventional automatic material feeder as described above, the material thickness detecting portion sets the material feeding portion at a predetermined height position with respect to the workpiece surface position. For this reason, since the pressing force of the material feeding portion pressing the workpiece is constant,
The material feeding power is also constant. However, it may be necessary to increase the feeding force depending on the material and thickness of the material to be processed. In such a case, the material feeding portion is lowered a little again to increase the pressure applied to the material by the material feeding portion and increase the material feeding force.

When the material feeding section is lowered again, the sensor of the plate thickness detecting section is already in contact with the material to be processed and is in a non-operating state. For this reason, there is no lowering limit for stopping the lowering operation at the time of re-lowering, and there is a problem that the material feeding section may be lowered too much and may be mechanically damaged.

In view of the above, the present invention makes it possible to automatically stop the re-lowering operation of the material feeding section at a predetermined lowering position in order to increase the material feeding force of the automatic material feeding device, and the automatic material feeding device is mechanically operated. The purpose is to prevent damage and improve its safety.

[0008]

SUMMARY OF THE INVENTION An automatic material feeding device for a wood working board according to the present invention comprises, firstly, a table on which a material to be processed is placed,
A feeding path is formed between the feeding section, which is disposed above the table and is driven by an electric motor, and the feeding section or the table is controlled by an operation switch in order to adjust the interval of the feeding path. A wood processing board equipped with an elevating and lowering drive unit that moves up and down under the control of a control unit that operates according to a command, and a work material thickness detecting means for stopping the elevating and lowering drive unit according to the thickness of the work material. The thickness detecting means detects the thickness of the material to be processed to stop the material feeding section, and the control section increases the material feeding force set by the drive amount setting means by the control section by the signal of the re-driving switch. It is characterized in that the distance between the material feeding paths is narrowed by driving only the driving amount for that.

Secondly, a means for detecting the thickness of the material to be processed and a means for setting the driving amount of the elevating and lowering drive portion for narrowing the interval of the material feeding path so as to increase the material feeding force are provided at the tip end. It is characterized in that it is constituted by an arm portion having a root end pivotally attached so as to swing by being brought into contact with a processed material, and a position sensor interlocked with the swing motion of the arm portion.

Thirdly, the arm portion is characterized in that the detection support rod is attached to the tip of the detection arm portion to which the root end portion is pivotally attached so that the detection support rod can be fixedly released at a required angular position.

[0011]

According to the first configuration, when the work material is placed on the table and the operation switch is pressed, the control unit controls the elevating and lowering drive unit so that the thickness of the work material detected by the detection means is adjusted. Correspondingly, the interval of the feeding path between the table and the feeding section is automatically set. When the re-drive switch is pressed to further improve the material feeding force, the control unit drives and controls the elevating and lowering drive unit by the required driving amount set by the driving amount setting means to increase the material feeding force, and thereby the interval of the material feeding path is increased. It has the effect of narrowing it.

According to the second structure, when the tip of the arm portion comes into contact with the surface of the work material during the operation of narrowing the interval of the material feeding path and the arm portion is swung, this swinging operation is performed. This has the effect of detecting with a sensor.

According to the third structure, by adjusting and changing the angular position at which the detection rod of the arm portion is tilted with respect to the detection arm portion, the interval of the material feeding path can be arbitrarily adjusted to facilitate the material feeding force. It works so that it can be adjusted.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an automatic material feeding device for a wood working board according to the present invention will be described below with reference to FIGS.

FIG. 1 is an overall side view showing a band saw machine according to a first embodiment of the present invention. FIG. 1 is a band saw section, 2 is an automatic feeding device section,
3 is a table which is a surface plate. The band saw portion 1 is erected on the base 4. The band saw portion 1 is for rotating the band saw 5 in a circulating manner.
The table 3 for mounting the table is mounted and the automatic material feeding device unit 2 is mounted.

The automatic material feeding device section 2 has an elevating mechanism section 7, a plate thickness detecting section 8, a material feeding section 9, and a control section. The elevating mechanism section 7 has a guide section 10 fixed to the band saw section 1. The guide part 10 is provided with two sliding guide cylinder parts 11, 11 and a screw insertion guide part 12. These two sliding guide cylinder parts 11, 11
The sliding rods 13 and 13 are slidably inserted into the
Below the two sliding rods 13, 13, there is a material feeding unit 9 with a plate thickness detecting unit 8.
And a lifting drive unit 14 is provided above the two sliding rods 13, 13.

A drive motor 15 which is a reversible electric motor is provided in the elevating and lowering drive unit 14 so that the screw rod 16 can be rotated in the forward or reverse direction. The screw rod 16 is screwed into the screw insertion guide portion 12 described above.

The elevating and lowering drive unit 14 drives the drive motor 15 and the sliding rods 1 and 1 are attached to the sliding guide cylinders 11 and 11 by the action of the screw mechanism of the screw rod 16 and the screw insertion guide unit 12.
The sheet thickness detection unit 8 and the material feeding unit 9 are moved up and down while being guided by 3.

When the elevating / driving unit 14 lowers the material feeding unit 9 toward the table 3, the plate thickness detecting unit 8 contacts the upper surface position of the workpiece 6 and automatically stops the lowering operation. It is for.

As shown in FIG. 2 to FIG. 4, the plate thickness detecting section 8 includes a detecting arm section 17, a first limit switch 18 for detecting the thickness of the workpiece 6, and a descending amount at the time of re-lowering. And a second limit switch 19 for detecting

The detection arm 17 has its root end attached to the bracket 20 of the plate thickness detection unit 8 by a fulcrum pin 21 so as to be rotatable in the clockwise direction from the position shown in the drawing. The plate thickness detecting portion 17 is formed so as to be bent from a portion that faces obliquely downward and extend horizontally as illustrated. At the free end of the detection arm 17, a root end of a detection support rod 23 having a detection roller 22 attached to the tip is attached by a bolt 24 so that the inclination angle can be adjusted so as to be directed obliquely downward.

With this structure, the bolt 2
4 is loosened and the angle at which the free end side of the detection support rod 23 is directed downward is adjusted in accordance with the pressing force (feeding force) to the workpiece 6, and each detection in contact with the workpiece 6 is adjusted. The support rod 23 and the detection arm portion 17 operate the first or second limit switches 18 and 19 at proper timing. This adjustment work can be easily performed by loosening the bolt 24.

As shown in FIGS. 2 and 3, the detection arm portion 1
7, a first support portion 25 corresponding to the first limit switch 18 as a position sensor is provided at a predetermined position in the middle of the horizontal extension portion.
And a second support portion 26 corresponding to the second limit switch 19 as a position sensor. 1st as shown
The upper surface of the support portion 25 is formed higher than the upper surface of the second support portion 26.

First and second limit switches 18, 19
Are installed in parallel at the same position as the bracket 20. The first and second limit switches 18 and 19 are usually used, and the root ends of the detection arms 27 and 28 having rollers at their free ends are pivotally attached to the respective lit switch bodies to detect the detection. When the arms 27 and 28 are swung toward the limit switch body side in the upper part of the figure, the button is pressed to perform the ON operation.

Detection arm 2 of the first limit switch 18
7 abuts on the first support portion 25, and the detection arm 28 of the second limit switch 19 abuts on the second support portion 26 to interlock. In this way, by providing a step between the first support portion 25 and the second support portion 26, the first limit switch 18
Is set so as to stop the drive motor 15 of the elevating / lowering drive unit 14 when the feed roller unit 9 reaches the normal lowered position with respect to the workpiece 6, and the second limit switch 19 causes the feed roller unit 9 to feed the material. It is set to stop the drive motor 15 of the elevating / lowering drive unit 14 when the re-lowering position for increasing the force is reached. The distance when the feed roller unit 9 is lowered again is preferably about 5 mm in order to smoothly feed the workpiece 6.

As shown in FIG. 1, the material feeding section 9 has a belt 31 wound around a pair of rollers 29 and 30, and one of the rollers 30 is constituted by a drive motor 32 and a winding transmission mechanism 33 which are interlocked with each other. . Further, as shown in FIG. 6, each of the rollers 29 and 30 is provided with a pair of links 74a, which are pivotally supported by a bolt 73 in a reverse V shape so as to be swingable in a housing 72 integrated with the support frame 52.
A shaft 76, which is rotatably supported by a bearing portion 75b at the tip of the bearing 74b, non-rotatably supports the bearing portion 56b of the bearing portion 75b.
And elastic members 57 supported at both ends by a bolt 53 with a collar 54 screwed into the housing 72 and elastically imparted downward.

With this structure, the rollers 29 and 30 are elastically pressure-bonded to the workpiece 6 so that the feeding operation can be performed reliably and smoothly. Next, the operation and operation of the first embodiment device configured as described above will be described.

First, when the cutting work is started by using the automatic material feeder, the workpiece 6 is placed at a predetermined position on the table 3.
To place. Next, the elevating mechanism section 7 standing by at the standby position above the table 3 is driven by operating the lowering switch 59 described later, and the material feeding section 9 provided with the plate thickness detecting section 8 is moved down. Then, the detection roller 22 of the plate thickness detection unit 8 that has descended comes into contact with the upper surface of the workpiece 6, and the detection support rod 23 and the detection arm unit 17 are rotated about the fulcrum pin 21 in the clockwise direction by a small angle. In conjunction with this, one detection arm 27 is pushed up, and the first limit switch 18 that detects the plate thickness of the workpiece is turned on. This first limit switch 18
Is turned on, the operation of the elevation drive unit 14 is stopped, the lowering operation of the material feeding unit 9 is stopped, and a normal material feeding state in which a material feeding path is formed between the table 3 is set.

Next, when it is desired to further increase the material feeding force, the operator operates the re-driving switch 60, which will be described later, to move the elevating mechanism section 7 down again in order to narrow the interval of the material feeding path. Then, the detection roller 22 and the detection support rod 23 on the workpiece 6 are further pushed up at the required lowering position, the detection arm 28 on the second supporting portion 26 thereof is pushed up, and the drive amount for re-lowering is detected. The second limit switch 19 is turned on. When the second limit switch 19 is turned on, the operation of the elevation drive unit 14 is stopped, the interval of the material feeding path is narrowed, and the material feeding force is increased to be set.
When the material feeding force is increased, the material feeding portion 9 is further lowered, so that the springs 57, which are the elastic members 34 supporting the rollers 29 and 30, are compressed, and the rollers 29 and 30 are respectively.
Increases the force pressing the workpiece 6 on the table 3 and increases the friction between the belt ring 31 wound around the rollers 29 and 30 and the workpiece 6.

When the work 6 is cut, the belt saw 5 is circulated and rotated for cutting, and the drive motor 32 of the feeding unit 9 is driven to wind the belt ring 3 wound around the two rollers 29, 30.
1 is circulated and rotated to feed the workpiece 6.

Next, at the end of this cutting operation, the elevating mechanism 7 is operated by raising a raising switch 58, which will be described later, so that the material feeding portion 9 and the plate thickness detecting portion 8 stand by at the standby position.
Next, a second embodiment of the present invention will be described with reference to FIGS. The second embodiment relates to the detection support rod of the automatic material feeding device section. First, as shown in FIG. 5, the detection arm portion and the detection support rod are formed into an integral arm portion 43. If you do this,
Even if it is used for a long period of time, it is possible to prevent an error in the detection position of the arm portion 43 due to a loose bolt or the like.

Next, since the detection arm 17 and the arm 43 have their root ends pivotally attached to the bracket 20 by the fulcrum pins 21, when they are left as they are, they drop downward when the material feeding section 2 rises. I will end up. Therefore, as shown in FIG. 6, a stopper member 44 is provided to prevent this. The stopper member 44 is formed by screwing a push screw 46 into a nut portion 45 fixed to the bracket 20. The tip of the push screw 46 is attached to the detection arm 1.
The detection arm portion 17 is supported so as not to hang down by coming into contact with the bent portion of 7. The holding position of the detection arm portion 17 is adjusted by moving the push screw 46 back and forth.

Next, a third embodiment of the present invention will be described with reference to FIGS.
Explained by. The third embodiment relates to the first and second limit switch portions which are the lowered position detecting means of the automatic material feeding device portion.

First, as shown in FIG. 7, the first supporting portion 25 and the second supporting portion 26 are formed at the same height, and the first limit switch 18 and the second limit switch 19 are arranged with a step. . Then, in accordance with the amount of the step, a timing deviation is adjusted when the signal for stopping the lowering of the first limit switch 18 is generated and the timing for generating the signal for stopping the lowering of the second limit switch 19 again. In addition, the first and second support portions 25 and 26 and the first and second limit switches 18 and 1
9 and 9 are arranged without providing a step, and the detection arm 2
By changing the shapes of 7, 28, both limit switches 18,
The signal generation timing of 19 may be shifted.

Also, the first and second limit switches 1
An optical sensor as illustrated in FIG. 8 may be used as the descending position detecting means other than 8 and 19 and the drive amount setting means of the drive unit at the time of re-lowering. That is, the first and second light emitting elements 47 and 48 and the first and second light receiving elements 49 and 50 are provided at predetermined two positions on opposite side surfaces of the frame body 46, respectively. Further, a through hole 51 is bored in the detection arm portion 17 or the arm portion 43, and the through hole 51 matches the optical path of the light emitted by the first light emitting element 47, and the first light receiving element 49 receives the light. Is set at the time of generation of the signal for stopping the descent, the through hole 51 is aligned with the optical path of the light emitted by the second light emitting element 48, and the light is emitted by the second light receiving element 50.
When the signal is received, the signal is generated when the signal for stopping the descending again is generated.

The descending position setting means is not limited to the above-mentioned structure, and a structure for detecting the operating position of the detection arm portion 17 using a magnetic sensor or a rotary encoder may be used. That is, although not shown,
It is also possible to install a magnet at a predetermined position of the detection arm 17 and arrange a magnetic sensor including a Hall element or the like at a predetermined position on the side surface of the member facing the detection arm 17 to detect the lowered position.

Further, a rotation angle detecting means such as a potentiometer and an encoder may be provided at the fulcrum pin 21 portion of the detecting arm portion 17. Further, a means for detecting the lowered position from the rotation amount (pulse number or the like) of the drive motor 15 of the elevation drive unit 14 in the automatic material feeding device unit 2, or the drive motor 1
Needless to say, various means such as means for measuring the rotation time of 5 to detect the lowered position may be used.

Next, the electric control system of the present invention will be described with reference to FIGS. 1, 9 and 10. This control system is operated by an operation panel 41 provided on the wood processing board body. Control panel 4
1, a raising / lowering switch 58, 59 and a re-driving switch 60 are provided.

Although not shown, a foot-type raising / lowering switch and a re-driving switch (not shown) may be provided together with the operation panel 41, or only a foot-type raising / lowering / re-driving switch may be provided. It may be configured to operate with. The control operation of this control unit is executed by the electric circuit of FIG.

First, control using the electric circuit of FIG. 10 will be described. In this circuit, a circuit related to switches and a circuit of the drive motor M are connected in parallel to the power source. Since this circuit raises the automatic material feeder 2, while the normally open contact (UP) is being closed by the ON operation of the raising switch 58, a predetermined position between the automatic material feeder unit 2 and the sliding rod 13 is set. Until the normally-closed contact (LS3) of the upper limit switch (not shown) arranged in the above is opened or the normally-closed contact (MC4SW1) opened by the excitation of the descending contactor (MC3) is opened. MC4) is excited. The normally open contact (MC3SW2) that is opened by this excitation is closed to reverse the reversible motor (M), and the normally closed contact (LS3) of the upper limit switch is opened or the ascending contact (MC4).
The automatic feeding device unit 2 is raised until the normally closed contact (MC4SW1) is opened by the excitation of.

Next, when lowering the automatic material feeder 2 onto the workpiece 6 on the table 3, the normally open contact (DOWN) is closed by the ON operation of the lowering switch 59. As a result, a normally closed contact (LS6) or a rising contactor (not shown) of a lower limit switch (not shown) arranged between the first limit switch (LS4) automatic sheet feeder 2 for detecting the plate thickness and the sliding rod 13 is provided. The descending contactor (MC4) is excited via a normally closed contact that opens upon excitation of MC3). By this excitation, the normally-closed contact (MC4SW1) is opened to regulate the upward movement, and at the same time, the normally-open contact (MC4SW2) is closed to rotate the reversible motor (M) in the forward direction to detect the plate thickness detection. The automatic feeding device 2 is moved downward until one of the normally closed contact (LS4) of the 1 limit switch 18, the normally closed contact (LS6) of the lower limit switch (not shown), or the normally closed contact (MC4SW1) is opened.

Next, when it is desired to increase the material feeding force in accordance with the material, weight, etc. of the workpiece 6, the re-driving switch 60 is turned on to close the normally closed contact (INTI). Then, irrespective of whether the plate thickness detection limit switch (LS4) is opened or closed, the second amount which is the drive amount setting means of the reversible motor (M).
Until the normally closed contact (LS5) of the limit switch 19 or the normally closed contact (LS6, MC3SW1) described above is opened, the descending contactor (MC4) is excited and the reversible motor is normally rotated.

Further, as drive amount setting means (LS5),
A predetermined drive amount of the motor is set by the number of operating pulses, operating time, etc., and the normally open contact (LS5) is closed by the number of pulses or time set by turning on the re-driving switch 60. May be.

As described above, the normally open contact (DOWN) of the lowering switch 59 and the normally closed contact (LS4) which is operated by the detecting means for detecting the thickness of the workpiece are the normally closed contact of the re-driving switch 60. (INTI) and the normally-closed contact (LS5) operated by the drive amount setting means of the reversible motor are provided in parallel, so by pressing the re-drive switch the feeding path narrowed at a predetermined interval by the plate pressure detection means. Further, since it can be narrowed by a predetermined amount, it is possible to increase the pressure applied to the material to be processed by the material feeding device in accordance with the material and weight of the material to be processed, and thus to improve the material feeding force.

Further, the drive amount of the material feeding section by the re-drive switch 60 is kept constant, so that mechanical damage can be prevented. Next, control using the electronic circuit of FIG. 11 instead of the electric circuit of FIG. 10 will be described.

First, the control of the descending operation of the automatic material feeder 2 is as follows. When the down switch 59 (down Pb) is pressed, the Low signal is inverted by the inverter 61 and becomes a Hi signal and enters the AND gate 62. At this time, if the plate pressure detection first limit switch 18 (plate pressure LS) is off,
The Hi signal enters the AND gate 62 to turn the Hi signal O
Send to R gate 63.

The output Hi signal of the OR gate 63, the output Low signal from the AND gate 64 which outputs the rising signal is inverted by the inverter 65, and the Low signal of the lower limit switch (LS6) is inverted by the inverter 71. The AND gate 66 which receives the Hi signal at the same time outputs the Hi signal to the reversible motor (DWON).
Will be output. Then, when any of the signals input to the AND gate 66 becomes Low, the descending signal of the reversible motor is stopped and the descending operation is stopped.

Further, in order to strengthen the material feeding force, when the re-driving switch 60 (pressurization Pb) is turned on, the pressurization P is increased.
b, the Low signal is inverted by the inverter 67, the Hi signal, and the pressurization detection second limit switch 18 (pressurization L
AND gate 68 which receives the Hi signal of S) at the same time
The i signal is sent to the OR gate 63.

The Hi signal output from the OR gate 63, the Hi signal obtained by inverting the output signal Low output from the AND gate 64 that outputs the rising signal by the inverter 65, and the Low signal of the lower limit switch (LS6) are sent to the inverter 71. The AND gate 66, which simultaneously receives the Hi signal inverted by the above, outputs the Hi signal, and the falling signal (D
OWN) is output. Then, when any of the signals input to the AND gate 66 becomes Low, the descending signal of the reversible motor is stopped, and the descending operation of the automatic material feeder 2 is stopped.

Next, the control of the raising operation of the automatic material feeding device 2 is as follows. First, when the switch 58 (rising PB) is turned on, the Low signal is inverted by the inverter 69 and becomes a Hi signal.

The AND gate 64 receiving the Hi signal, the Hi signal of the upper limit switch (upper limit LS) and the Hi signal obtained by inverting the Low output signal of the AND gate 66 by the inverter 70 at the same time outputs the Hi signal. Then
A rising signal (UP) is output to the reversible motor to move the automatic material feeding device 2 upward. This raising operation is performed by AND gate 6
When any of the signals entering 4 becomes Low, the rising signal is stopped, and the lifting operation of the automatic material feeder 2 is stopped.

Control by software shown in the flowchart of FIG. 12 instead of the electric circuit of FIG. 10 will be described below. First, the control of the raising operation of the automatic material feeding device 2 is as follows.

First, in step 1 (S1), it is determined whether or not the push button, which is the raising switch 58, is ON.
If S, the process proceeds to the next step 2 (S2), and it is determined whether or not the upper limit switch (LS) is ON. And
If this is YES, it returns to step 1 (S1) and N
If it is O, the process proceeds to step 3 (S3), the descending relay is turned off, the process proceeds to step 4 (S4), the ascending relay is turned on, and the process proceeds to step 5 (S5). Step 5 (S
In 5), it is judged whether or not the ascending push button is ON, and Y
If it is ES, the upper limit switch of step 2 is O
The ascending operation is continued until it is N. If NO, the process returns to step 1 (S1). In this way, the automatic material feeder 2
Is raised to a predetermined position.

Next, the control for lowering the automatic material feeder 2 will be described. In step 1 (S1), it is determined whether or not the up push button is ON. If NO, then
Move to step 6 (S6). And step 6 (S6)
Then, the lower push button which is the lower switch 59 is turned on.
If YES, step 7 (S
Move on to 7).

In step (7), it is judged whether or not the lower limit switch is ON, and if YES, step 1 (S
Returning to 1), if NO, the process proceeds to step 8 (S8).
In step 8 (S8), it is determined whether or not the plate thickness limit switch is ON, and if YES, step 1 (S8)
Returning to 1), if NO, the process proceeds to step 9 (S9).

In step 9 (S9), the ascending relay is turned off, the process proceeds to step 10 (S10), the descending relay is turned on, and the process proceeds to step 11 (S11). Step 11 (S
In 11), it is determined whether or not the descending push button is ON, and if NO, the process returns to step 1 (S1), and if YES, the lower limit switch in step 7 (S7) or the plate thickness in step 8 (S8). The lowering operation is continued until one of the limit switches is turned on. In this way, the control of the lowering operation of the automatic material feeder 2 is executed.

Next, the control when the re-driving switch 60 is turned on in order to strengthen the feeding force will be described. In this case, in step 6 (S6), the lower push button is pressed.
If NO, step 12 (S1
Go to 2). In step 12 (S12), it is determined whether or not the pressure push button that is the re-driving switch 60 is ON. If NO, the process returns to step 1 (S1), and YE
If S, the process proceeds to step 13 (S13) to determine whether or not the lower limit switch is ON, and if YES, the process returns to step 1 (S1). If the determination in step 13 (S13) is NO, it is determined whether or not the pressurization limit switch is ON. If YES, step 1 (S13)
Return to 1).

If the determination in step 14 (S14) is NO, the process proceeds to step 15 (S15) to turn off the ascending relay, and the process proceeds to step 16 (S16) to turn on the descending relay.
Then, the process proceeds to step 17 (S17). Step 17 (S
In 17), it is determined whether or not the pressure push button is ON. If NO, the process returns to step 1, and if YES, the lower limit switch in step 13 (S13) or the pressure limit switch in step 14 (S14). Continue to descend until any of the above is turned on. In this way, the control of the re-lowering operation of the automatic material feeder 2 is executed.

In each of the above-described embodiments, the construction for raising and lowering the automatic material feeding device section 2 has been described.
It is needless to say that the automatic material feeding device section 2 may be fixed and the table 3 as a surface plate may be moved up and down.

Furthermore, the present invention is not limited to band saw machines, but can be applied to wood processing machines such as planes and grooving machines. Further, the upper limit switch and the lower limit switch in the control system are provided as a safety measure for limiting the excessive lifting operation of the automatic material feeding device section 2.

[0061]

As described above in detail, according to the automatic material feeding device for the wood working board of the present invention, firstly, the table on which the material to be worked is placed and the table provided above the table are disposed so as to face each other. In addition, a feeding path is formed between the feeding section driven by an electric motor and the feeding section or the table is moved up and down by the control of the operation switch to operate the feeding section or the table to adjust the interval of the feeding path. Installed an elevating drive part that operates, and installing a work material thickness detecting means for stopping the elevating drive part according to the thickness of the work material, and detecting the thickness of the work material by the thickness detecting means. Then, the feeding section is stopped, and the control section drives the lifting drive section by the drive amount for increasing the feeding force set by the driving amount setting means in response to the signal from the re-driving switch, and the feeding path interval is increased. Since it is configured to narrow the feeding position, the feeding position can be increased at the normal feeding position or feeding force. It is possible to automatically and easily perform the work of setting at the specified position, and since the lifting mechanism part is automatically stopped by the work thickness setting means and drive amount setting means, the material feeding part is excessive. There is an effect that the feeding roller portion is strongly pressed against the workpiece on the table to prevent mechanical damage and improves the safety.

Secondly, the tip of the workpiece is processed by means for detecting the thickness of the workpiece and means for setting the drive amount of the elevating and lowering drive unit in order to narrow the interval of the feeding path so as to increase the feeding force. Since it is composed of an arm portion whose root end is pivoted so as to swing when brought into contact with a material, and a position sensor which interlocks with the swinging motion of the arm portion, it is possible to reliably detect with a simple structure and inexpensive. There is an effect that the product can be provided.

Thirdly, since the arm is constructed by attaching the detection support rod to the tip of the detection arm having the root end pivotally attached so that the detection support can be fixedly released at a required angular position, the thickness of the workpiece can be set. Means and the setting positions of the drive amount setting means can be arbitrarily adjusted, and the work can be facilitated. Therefore, there is an effect that the work of properly adjusting the interval of the material feeding path can be facilitated and the adjustment work of increasing the material feeding force by a required amount can be facilitated.

[Brief description of drawings]

FIG. 1 is an overall side view showing a first embodiment of an automatic material feeding device for a wood processing board according to the present invention.

FIG. 2 is an enlarged side view showing a plate thickness detection unit of the first embodiment.

FIG. 3 is an enlarged front view showing a plate thickness detection unit of the above embodiment.

FIG. 4 is an enlarged side view showing a detection support portion of the plate thickness detection unit of the above embodiment.

FIG. 5 is an enlarged front view of a plate thickness detection unit showing a second embodiment of the present invention.

FIG. 6 is a front view of a main portion of the first embodiment.

FIG. 7 is an enlarged front view of essential parts showing first and second limit switch portions of the detecting means according to the third embodiment of the present invention.

FIG. 8 is an enlarged front view of main parts showing another configuration example of the drive amount setting means of the above embodiment.

FIG. 9 is a front view of an embodiment of the control panel of the present invention.

FIG. 10 is an electric circuit diagram illustrating a control unit configured by the electric circuit of the above embodiment.

FIG. 11 is an electronic circuit diagram illustrating a control unit including the electronic circuit of the above-described embodiment.

FIG. 12 is a flowchart illustrating a control unit that operates with software of the above-described embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Band saw part 2 ... Automatic material feeding device part 3 ... Table 6 ... Work material 7 ... Elevating mechanism part 8 ... Plate thickness detection part 9 ... Material feeding part 14 ... Elevating drive part 17 ... Detection arm part 18 ... 1st limit Switch 19 ... Second limit switch 22 ... Detection roller 23 ... Detection rod 24 ... Bolt 25 ... First support 26 ... Second support 27 ... Detection arm 28 ... Detection arm 34 ... Elastic member

Claims (3)

[Claims] 1. A material feeding path is formed between a table on which a material to be processed is placed and a material feeding portion which is disposed above the table so as to face the material and is driven by an electric motor. In order to adjust the distance between the paths, an elevating and lowering drive unit is installed for elevating and lowering the material feeding unit or the table under the control of a control unit operated by a command of an operation switch, and the elevating and lowering drive unit is provided for the thickness of the workpiece In the wood processing plate provided with the work material thickness detection means for stopping according to the, the thickness detection means detects the thickness of the work material to stop the material feeding unit, and the re-driving switch According to a signal, the control unit is configured to drive the elevation drive unit by a drive amount for increasing the material feeding force set by the drive amount setting means, and to narrow the interval of the material feeding path. Automatic material feeding device for wood processing boards. 2. A workpiece material thickness detecting means and a means for setting a driving amount of an elevating and lowering drive portion for narrowing a space of a material feeding path so as to increase a material feeding force. 2. The wood processing board according to claim 1, wherein the wood processing board comprises an arm portion having a root end pivotally attached so as to swing by being brought into contact with the arm portion, and a position sensor interlocked with the swing movement of the arm portion. Automatic material feeder. 3. The wood according to claim 2, wherein the detection arm is attached to the tip of the detection arm pivotally attached to the root end so that the detection support can be fixedly released at a required angular position to form the arm. Automatic material feeder for processing board.