JPH0149081B2 - - Google Patents

Description

Detailed Description of the Invention <Industrial Application Field> The present invention is a vertical slicer that repeatedly moves a workpiece back and forth against a surface plate equipped with a cutting blade to obtain a large number of veneers. This invention relates to a vertical slicer for woodworking in which a feed frame is brought closer to a surface plate in response to a decrease in the thickness of a workpiece, and an appropriate cutting pressure is always applied to the workpiece.

<Prior art> A vertical slicer for woodworking with a conventional simple configuration rotates the feed screw by a fixed angle for each reciprocation of the workpiece, and the material feed frame equipped with the material feed belt adjusts to the thickness of the veneer. The cutting pressure was applied to the workpiece by moving it closer to the surface plate by a fixed size. By the way, in the above structure, since the material feeding frame is not moved forward and a predetermined cutting pressure is applied with the upper surface of the workpiece as a reference, cutting errors of the workpiece accumulate every time the workpiece is cut, and the veneer is cut to a predetermined thickness. There was a drawback that it became impossible to obtain.

Therefore, as disclosed in Japanese Utility Model Application No. 59-171906, the top surface of the workpiece is detected by a detection roller, and from this detection, the amount of movement of the motor of the material feeding frame, etc. is detected by a counter, and the counter is set. It has been proposed to move the material transport frame closer to the surface plate by an amount corresponding to the amount of movement.

<Problems to be Solved by the Invention> By the way, when using such means to reverse feed the workpiece, a reverse feed pressure that is less severe than the cutting pressure is applied to the workpiece. Must be applied to the workpiece material. Therefore, after the process of cutting the workpiece, the material feeding frame is raised by an amount corresponding to the pressure difference.

Due to this reverse feeding pressure, the workpiece returns to the feeding position, but the workpiece may be of heavy weight or
Some materials are made of non-slip materials, and in this case, in order to enable reverse feeding, it is necessary to reduce the distance between the material feeding frames and to ensure sufficient reverse feeding pressure. By the way, if the separation amount is too small, the detection roll will operate as it is when the workpiece returns to the feeding position, and therefore the amount corresponding to the set cutting pressure will be reduced from the reverse feeding position of the material feeding frame. This causes the problem that the cutting pressure in the next cutting process becomes excessive. Therefore, in such a method, when the reverse feeding of the workpiece material is completed, the material feeding frame is moved away to ensure that the detection roll returns to the non-detection state, and then brought closer to the detection roll so that the detection roll is not detected. It is necessary to detect and operate the counter as the workpiece comes into contact with the feed surface.

For this reason, the movement of the material feeding device toward and away from the feeding position increases the time required for one cycle of the workpiece to be processed, resulting in a drawback that work efficiency is significantly reduced.

The present invention aims to eliminate such drawbacks.

<Means for Solving the Problems> The present invention is characterized in that a surface plate equipped with a cutting blade and a material transport frame equipped with a reversible material transport belt are disposed opposite each other with a material transport path therebetween, and the material transport frame is defined. The material is moved toward and away from the disk, and the material feeding belt is brought into pressure contact with the workpiece, so that cutting pressure is applied to the workpiece during forward feeding, and reverse feeding pressure is applied during reverse feeding. In the vertical slicer for woodworking, there is a workpiece detection roller that is arranged on the inner surface of the entrance side of the material conveying belt and can move in a direction perpendicular to the table surface, a contact end of the detection roller, and a contact/separation interval s. are placed opposite each other so that the contact end detects the detection state of the workpiece,
The detector LS ₁ is converted into a non-detecting state, and the detector LS 1 is activated when the material feeding frame moves close to the surface plate side and the detector LS ₁ is in the sensing state, and the material feeding frame moves in the approaching direction. Counter C ₁ instructs to stop driving the retracting motor of the material feeding frame when the set moving amount The amount of movement of the material feeding frame that moves away is counted, and as the set movement amount y corresponding to the retreat stroke of the material feeding frame to the reverse feeding position is counted, the retracting motor of the material feeding frame is driven. a counter _C2 that commands a stop; a calculation device that calculates the sum of the set movement amount x and the set movement amount y; and a calculation device that counts the movement amount of the rotation axis of the material feeding frame in the approach direction and Counter C ₃ commands the rotation stop as the calculated value is counted, and the state of the detector LS ₁ is determined based on the feed position of the workpiece, and if it is in a non-detecting state, the counter
The gate of counter C ₁ is opened and the counter C 1 is placed in a standby state in which it can be activated in response to the generation of the next detection signal from the detector LS _1. When in the detection state, the gate of counter C ₁ is closed and the counter C 3. The present invention is characterized by comprising a comparison and selection means for activating ₃ .

Incidentally, the comparison and selection means is implemented by the central control unit CPU.
When using , it consists of the required programs. In other cases, it can be easily constructed using the necessary logic circuits. Further, the detector LS ₁ may be constituted by a limit switch or the like, and in its OFF state, it is in a workpiece detection state, and in its OFF state, it is in a non-detection state, or in its ON state, it is in a workpiece detection state, The off state may be a non-detection state.

<Operation> The workpiece is moved from the feeding position by the running material frame.
It is fed forward with cutting pressure applied, and one side of it is cut by a cutting blade. After the normal feeding is completed, the material feeding frame is slightly retracted to a position where reverse feeding pressure can be applied to the workpiece, and then the workpiece is fed back.

When the workpiece is fed back to the feed position, the detection roll contacts the workpiece via the running belt at the feed position due to the reverse feed pressure, and is retracted.
If this retraction amount is within the distance s set between the contact end of the detection roller and the detector LS ₁ , the detector LS ₁ will be kept in a non-detecting state, but the reverse feed pressure will be high. When the amount of movement exceeds the contact/separation distance s, the detector LS ₁ enters the detection state.

Therefore, the comparison circuit determines the state of the detector _LS1 . At this time, if the detector LS ₁ is in a non-detecting state, the gate of the counter C 1 is opened and the counter C ₁ is placed in a standby state. In addition, in the case of a detection state, the gate of counter _C1 is closed and counter _C3 is activated.

Therefore, when the material feeding frame moves close to apply cutting pressure to the workpiece, the detector
When LS ₁ is in the non-detecting state, the detector LS ₁ becomes in the detecting state due to the movement of the detection roll, and accordingly, the counter C ₁ is activated, and the counter C ₁ corresponding to the set thickness of the veneer is activated. As the set movement amount x is counted, the running material frame stops approaching. For this reason, the material feeding frame moves closer to the surface of the material to be processed, and the material feeding frame is set at an appropriate position relative to the surface plate so that the material to be processed has a predetermined cutting thickness. Granted.

In addition, when the detector LS ₁ is in the detection state, the counter moves as the material feeding frame approaches.
_C3 counts the amount of movement of the material feeding frame, and calculates the sum of the retraction stroke of the material feeding frame in the previous process (set movement amount y) and the set movement amount x to apply cutting pressure to the workpiece. The material feeding frame is stopped when the amount of movement has been counted. As a result, the material feeding frame is positioned at a position closer to the previously set position by the set movement amount x for applying cutting pressure.

<Example> An example of the present invention will be described with reference to the accompanying drawings.

Figures 1 and 2 show an example of a vertical slicer.
Reference numeral 1 denotes a base, and a material feeding frame 3 is supported at an upper position by a support 2 erected on one side of the base.
The material feeding frame 3 includes a vertical feeding screw 7,
7, and the rotating shaft 10 disposed between the feed screws 7, 7 is connected to the feed screws 7, 7 by a bevel gear as shown in FIG. By connecting the elevating motor _M1 (approaching motor) with a chain, the feed screws 7, 7 are reversibly rotated as the elevating motor _M1 rotates, and the material feeding frame 3 is moved up and down. A slit plate 11 is fitted onto the drive shaft of the elevating motor _M1 , and a detector K is arranged on the outer periphery of the slit plate 11. The detector K is connected to counters C ₁ , C ₂ , C ₃ , and each time the detector K passes through the slit of the slit plate 11 , the counters C ₁ , C ₂ , C ₃
It has the function of sending signals to. The detector K may be arranged on the feed screw 7 or the rotating shaft 10 to detect the amount of movement thereof.

The material feeding frame 3 supports front and back a drive roll 4 and a driven roll 5 which are belt-driven by a reversible material feeding motor _M2 , and an endless material feeding belt 6 is wrapped around the rolls. A large number of press rolls 9 are provided inside the material belt 6 and are urged downward by a bullet device 8 such as an air cylinder or a spring.

On the base 1, there is a rear surface plate 13 on which a cutting blade 12 is mounted inclined with respect to the traveling direction of the workpiece w.
is fixed, and a movable table 15 having a front inclined descending surface 14 formed on the upper surface is placed in front of the movable table 15. A screw rod 16 supported on the front surface of the base 1 is screwed into the movable table 15 in the front-rear direction, and by rotating the handle of the screw rod 16, the moving table 15 is moved in the front-rear direction on the base 1.

Further, on the movable table 15, there is provided an intervening table 1 having an inclined surface 17 formed on the lower surface with an angle of inclination equal to that of the inclined surface 14.
8 on board.

Furthermore, a front surface plate 25 is mounted on the horizontal upper surface of the intervening table 18 and is vertically opposed to the material feeding frame 3 with a material feeding interval therebetween. The cutting edge 24 is provided in front of the cutting blade 12 so as to be inclined at the same angle (see FIG. 2). Said interposition stand 1
A screw rod 19 supported on the lower front surface of the front surface plate 25 is screwed into the screw rod 8 in the front-rear direction, and by rotating the handle of the screw rod 19, the interposed stand 18 can be moved onto the moving table 15. It moves back and forth and raises and lowers the upper surface of the intervening stand 18 to raise and lower the blade mouth 24 relative to the cutting blade 12.

One of the front parts of the pressure roll 9 is a detection roller 9a, and as shown in FIG. 3, an elevating shaft 31 whose lower end is fixed to a shaft support piece 30 projects upward from a support plate 32, and a nut is attached to a screw at the upper end of the elevating shaft 31. 33 and a flanged nut 34 (contact end) are sequentially screwed together, and a spring 35 is attached between the shaft support piece 30 and the support plate 32, and the elasticity of the spring 35 attaches the detection roller 9a to the material feeding path side. The sensor LS 1 is inscribed in the endless material conveying belt 6 by force, and a detector LS ₁ is provided below the flanged nut 34 .
The detector LS ₁ and the flanged nut 34 are in engagement contact in a normal state, and the detector LS ₁ is in the on state (non-detecting state) at the solid line position in FIG. Then, as will be described later, the material feeding frame 3 descends to apply cutting pressure to the workpiece w in the supply position,
Only when the detection roller 9a rises by the contact/separation distance s due to the reaction force caused by contact with the upper surface of the workpiece w, is the engagement released and the OFF state (detection state) shown by the chain line in FIG. 3 taken place. . That is, in this configuration,
The workpiece is detected by turning off the detector LS ₁ . Further, one of the rear portions of the pressure roll 9 is also a detection roller 9b having the same structure as described above, and a detector LS ₂ which is activated by coming into contact with and separating from the flanged nut 34 is disposed above the detection roller 9b.

The operation of the present invention will be explained with reference to FIG.

First, among the counters C ₁ , C ₂ , and C ₃ , the counter C ₁ has the number of slits in the slit plate 11 corresponding to the movement amount x in order to read the set movement amount x corresponding to the required setting thickness of the veneer. Set. Similarly, the counter C ₂ contains the set movement amount y corresponding to the amount of rise of the material feeding frame that can relieve pressure on the workpiece and reverse feed pressure, and the counter C ₃ contains the above movement amount x and the set movement amount. In order to detect the amount of movement of the sum of y, the number of slits in the slit plate 11 is set corresponding to the amount of movement.

The numerical value setting is calculated and input as the number of slits into each counter by inputting the required distance value using an appropriate input key.

Next, the following steps are executed under the control of the central control unit CPU or using a contact circuit or the like.

(1) Applying cutting pressure Place the workpiece w on the front upper surface of the surface plate 25,
Press the start button PB shown in Figure 4. As a result, the elevating motor _M1 descends, causing the material feeding frame 3 to descend. Due to this descent, the lower surface of the endless material conveying belt 6 comes into contact with the upper surface of the workpiece w, and when it further descends and exceeds the stroke of the contact/separation interval s, the flanged nut 34 disengages the detector LS ₁ , and this is in the off state (detection state). Accompanying this, the gate of the counter _C1 is opened, and the number of passages through the slit of the slit plate 11 corresponding to the amount of movement of the drive shaft of the lifting motor _M1 is counted based on the signal generated from the detector K. When the counter _C1 has counted the set number, the lifting motor _M1 is deactivated and the material feeding frame 3 stops descending, and at this stop position, the material feeding belt 6 reaches the workpiece w. Pressure is applied to apply the optimum cutting pressure.

(2) Forward feeding of the workpiece w When the material feeding frame 3 stops descending, the material feeding motor M ₂ is driven for normal feeding, and the endless material feeding belt 6
By running, the workpiece w is fed forward. Further, the counter _C1 returns to its initial state. Due to this forward feeding, the lower surface of the workpiece w is subjected to vertical cutting by the cutting blade 12, and the veneer is discharged downward.

(3) Stopping the normal feed of the workpiece w The workpiece w is fed normally, and its front end raises the detection roller 9b, and the detector LS ₂ disengages from the flanged nut 34, turning it off. state (detection state), and when the rear end of the workpiece w passes and the detector LS ₂ returns to ON, the material feed motor
The drive of _M2 is stopped, and the workpiece w stops traveling.

(4) Lifting of the material feeding frame 3 and its stop When the driving of the material feeding motor M ₂ is stopped, the lifting motor M ₁ is driven upward, causing the material feeding frame 3 to rise, and cutting pressure on the workpiece w is increased. is canceled. At the same time as the lifting motor _M1 is driven, the gate of the counter _C2 is opened, and the detector K counts the number of slits in the slit plate 11 corresponding to the amount of movement of the drive shaft of the lifting motor _M1 . When the number of slits corresponding to the set movement amount y of the counter C ₂ has been counted, the lifting motor M ₁
stops driving, and the material feeding frame 3 stops rising. At this stop position, the workpiece is transferred to the material conveying belt 6.
This provides the optimum material feeding pressure.

The amount of rise set by this counter C ₂ should be set large in order to alleviate the contact with the cutting blade 12, since if the workpiece is light, reverse feeding is possible even if the reverse feeding pressure is low. Can be done. On the other hand, if the workpiece is heavy or is made of a material that is difficult to slip, it is necessary to increase the reverse feeding pressure to enable the reverse feeding, and therefore the amount of increase needs to be kept small. In this case, it is necessary to adjust each time according to the size of the workpiece.

(5) Reverse feeding of the workpiece w When the material feeding frame 3 stops rising, the material feeding belt M ₂ is driven in reverse. As a result, the endless material conveying belt 6 runs in the opposite direction, causing the reverse feeding of the workpiece w, and at the same time, the counter _C2 returns to its initial state. Further, when the front end of the workpiece w passes the detector LS ₂ as the endless material feeding belt 6 is driven, the timer T ₁ is driven, and when the set time of the timer T ₁ expires, the material feeding motor M ₂ is activated. The drive of is released, and the workpiece w returns to the feeding position.

(6) Lowering of the material feeding frame 3 Due to the stoppage of the material feeding motor _M2 mentioned above,
Lifting motor _M1 drives downward.

Meanwhile, in synchronization with this, the comparison and selection means operates to detect the state of the detector _LS1 .

That is, when the workpiece is in a stopped state, its front end is located below the detection roller 9a. The flanged nut 34 of the detection roller 9a is spaced apart from the detector LS ₁ because it applies reverse feed pressure to the workpiece.

Incidentally, a spacing s between the detector LS ₁ and the flanged nut 34 is provided. Therefore, when the weight of the workpiece is small, the reverse feed pressure is low, the separation amount is within the contact/separation distance s, and the detector LS ₁ is kept in the on state (non-detecting state). There is.

On the other hand, as mentioned above, in the case of heavy workpieces, etc., it is necessary to increase the reverse feed pressure, and for this reason, the amount of separation may exceed the contact/separation distance s. In this case, detector LS ₁ is in the off state (detection state)
It is becoming.

Therefore, by the comparison and selection means, the detector
The following operation occurs in response to the state of LS ₁ .

(a) When the detector LS ₁ is in the on state (non-detection state), the lifting motor M ₁ is driven, causing the material feeding frame 3 to descend, and the approach/separation distance s is exhausted in the same way as in step 1), Flammed nut 34 and detector
Disengagement with LS ₁ occurs, and counter C ₁ is activated. Lifting motor M ₁ by this counter C ₁
Detection of a predetermined amount of movement causes the material feeding frame 3 to stop. Therefore, the same cutting pressure as in 1) above is applied to the workpiece w, and vertical bumps of a predetermined thickness are caused by the forward feeding of the workpiece w as the feed motor _M2 is driven. It is applied to the underside of the .

(b) When the detector LS ₁ is in the OFF state (detection state), the lifting motor M ₁ is driven, and the arithmetic unit calculates the set number corresponding to the sum of the set travel amount x and the set travel amount y of the drive shaft. It is calculated and set in counter _C3 . This counter _C3 causes the lift motor to be activated by the signal generated from the detector K.
Slit plate 1 corresponding to the movement axis of the _M1 drive shaft
The number of passages through one slit is counted, and when the set number corresponding to the set movement amount x is counted, the driving of the lifting motor _M1 is released. In such a state, the material feeding frame has been further lowered by the set travel amount x of the drive shaft from the position in step 2), and in the end, the material feeding frame has been lowered by a predetermined amount based on the previous set position.
Appropriate cutting pressure is applied to the workpiece w.

Thereafter, each of the above-mentioned steps is repeated, and the workpiece w is moved back and forth, and a veneer of a predetermined thickness is cut with each reciprocation.

In the above embodiment, the material feeding frame 3 is connected to the surface plates 13 and 25.
Although the present invention is adapted to a slicer disposed at the top, the present invention can of course also be applied to a slicer in which the material feeding frame 3 and the surface plates 13 and 25 are disposed in front and behind each other.

<Effects> As described above, the present invention eliminates the need to move the material feeding frame away when the workpiece is reversely fed and returns to the feeding position, and allows the material feeding frame to immediately approach the surface plate. Since the cutting pressure is set accordingly, the cycle time of the workpiece is shortened and efficient cutting work is possible. In addition, since the feed frame is repositioned at the feed position based on the feed surface of the workpiece or the previously set position, it is possible to always cut veneers of accurate thickness. It has a positive effect.

[Brief explanation of drawings]

The accompanying drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway plan view of the vertical thrust slicer, FIG. 2 is a partially cutaway side view of the same, FIG. 3 is a side view of the detection roller 9a, and FIG. 4 is a side view of the detection roller 9a. is a flowchart. 3; Material feeding frame, 6; Endless material feeding belt, 9
a, 9b; detection roller, 13, 25; surface plate, 3
4: Nut with flange, M ₁ : Lifting motor, M ₂ : Material feeding motor, LS ₁ , LS ₂ : Detector, s: Contact/separation interval.

Claims (1)

[Scope of Claims] 1. A surface plate equipped with a cutting blade and a material feeding frame equipped with a reversible material feeding belt are arranged opposite to each other with a material feeding path therebetween, and the material feeding frame is moved toward and away from the surface plate. In a vertical slicer for woodworking, the feed belt is brought into pressure contact with the workpiece, and cutting pressure is applied to the workpiece during forward feeding, and reverse feeding pressure is applied during reverse feeding. , a workpiece detecting roller disposed on the inner surface of the inlet side of the material conveying belt and capable of moving in a direction perpendicular to the table surface; and a contact end of the detecting roller facing each other with a spacing s between them. a detector LS 1 that is converted into a sensing state and a non-sensing state by the contact end; and a detector LS ₁ that is activated when the material feeding frame moves close to the surface plate and the detector LS ₁ is in the sensing state; a counter _C1 that counts the amount of movement of the material feeding frame in the approach direction and instructs to stop driving the approaching motor of the material feeding frame when the set movement amount x corresponding to the set thickness of the projecting plate is counted; The amount of movement of the material feeding frame that moves away when the forward feeding of the workpiece is completed is counted, and as the set movement amount y corresponding to the retreat stroke of the material feeding frame to the reverse feeding position is counted, the material feeding frame is moved away. a counter C ₂ that commands to stop driving the moving away motor of the material frame; a calculation device that calculates the sum of the set movement amount x and the set movement amount y; and a movement amount of the rotating shaft of the material feeding frame in the approach direction. and a counter C3 which instructs the rotation stop as the calculation value of the arithmetic device is counted, and a counter _C3 which determines the state of the detector _LS1 based on the feed position of the workpiece and determines the non-detection state. counter if it is in
The gate of counter C ₁ is opened and the counter C 1 is placed in a standby state in which it can be activated in response to the generation of the next detection signal from the detector LS _1. When in the detection state, the gate of counter C ₁ is closed and the counter C _3. A vertical slicer for woodworking, characterized in that it is equipped with comparison and selection means for operating 3.