JPH0331321B2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention provides a super-finishing plane for woodworking in which a reversible material feeding device and a material feeding guide surface equipped with a cutting blade are disposed oppositely so as to be movable relative to each other. The present invention relates to a reciprocating cutting device that returns to a supply position after finish-cutting a supplied workpiece in a machine.

<Prior art> A super finishing planer for woodworking equipped with this type of reciprocating cutting device is known as disclosed in Japanese Patent Publication No. 52-11077, Japanese Utility Model Publication No. 53-1679, Japanese Utility Model Publication No. 57-42642, etc. It is.

<Problems to be Solved by the Invention> Incidentally, in all of these methods, the supply position of the processed material is limited to one position, the front position.

For this reason, if a super-finishing plane machine for pre-processing such as rough cutting of the workpiece is placed at the rear of a super-finishing plane machine for finishing, it is necessary to transport the workpiece to the front once. be. As described above, inefficiency is created due to the arrangement of each piece of equipment, and in order to correct this, restrictions are placed on the arrangement of processing lines for processed materials.

The present invention aims to eliminate the drawbacks of such conventional devices.

<Means for Solving the Problems> The present invention includes a reversible material conveying device in which a material conveying belt is stretched between a drive roll driven by a reversible material motor and a driven roll, and a cutting blade. A super-finishing planer for woodworking in which a reversible material feeding device and a material feeding guide surface are arranged so as to be relatively movable apart by an elevating motor, and a material feeding path is created between the reversible material feeding device and the material feeding guide surface, It is enabled by the front detection switch installed at the front entrance end of the material feeding path, the rear detection switch installed at the rear entrance end of the material feeding path, and the front detection switch detecting the workpiece, and reversible feeding is possible. A reciprocating motion for pre-feeding that drives the material motor to generate a forward drive of the reversible feed material device, and when the rear end of the workpiece passes the position of the cutting blade, controls the cutting of the reversible feed material motor to produce a reverse drive. It is activated by the control means and the detection of the workpiece by the rear detection switch, and drives the reversible material motor to cause the reversible material device to be driven in reverse, and when the front end of the workpiece passes the position of the cutting blade, the reversible material motor is activated. Selection of a reciprocating motion control means for rear supply that performs switching control to produce forward feed drive, and a control means that disables the other switch when one of the front detection switch and rear detection switch is turned on first. It is equipped with a mechanism.

<Function> When the workpiece is inserted from the front side, the front detection switch is turned on, and along with this, the front supply reciprocating motion control means is selected and becomes effective, and the control means selection mechanism disables the rear detection switch. Became
If the workpiece subsequently activates the rear detection switch, the rear feeding reciprocating control means will not operate. Then, by the forward feeding reciprocating drive device, the reversible material motor causes the workpiece to be driven forward in the reversible material device, and when the trailing end passes the cutting blade, the workpiece is driven in reverse. Therefore, the workpiece is cut as it travels back and forth.

On the other hand, when the workpiece is inserted from the rear side, the rear detection switch is turned on, and along with this, the rear supply reciprocating motion control means is selected and enabled, and the control means selection mechanism disables the front detection switch. Therefore, even if the workpiece subsequently activates the rear detection switch, the front feeding reciprocating motion control means will not operate. Then, by the reciprocating drive device for post-feeding, the workpiece is driven in reverse by the reversible material motor, and when its front end passes the cutting blade, it is driven in forward and reverse directions. Therefore, the workpiece is cut as it travels back and forth.

That is, regardless of whether the workpiece is inserted from the front or the rear, only the reciprocating control means corresponding to the feed position is effective, and the workpiece automatically travels back and forth, returning the workpiece to its insertion position.

<Example> Fig. 1 shows an example of a super finishing planer for woodworking to which the present invention is applied, in which a material feeding table 2 whose upper surface is a material feeding guide surface 2a is provided on a base 1. The material feeding table 2 has a cutting blade 4 with a cutting edge protruding backward.
A knife stock 5 equipped with a knife stock 5 is attached so that it can be freely attached and detached from the side. Further, on the material feeding table 2, a material feeding device 9 is provided opposite to the material feeding table 2 via a material feeding path s. The material feeding device 9 includes a lifting motor that rotationally drives the lifting screw 8.
It moves up and down along the guide columns 7, 7 by _M1 .

The reversible material feeding device 9 supports a driving roll 11 driven by a reversible material feeding motor M ₂ and a driven roll 12 in the front and back in a material feeding frame 10.
It is constructed by wrapping a material conveying belt 13 around the rolls 11 and 12.

Further, a front detection switch S ₁ is provided on the front surface of the material feeding frame 10, and a rear detection switch S ₂ is provided on the rear surface.
are fixed in such a way that their detection ends are at a height that substantially coincides with the lower surface of the material conveying belt 13.

On the material feeding guide surface 2a, the material feeding belt 1
Switches S ₂ and S ₆ for detecting passage of the end of the workpiece are provided at the lower portions of the front and rear ends of the workpiece.

Furthermore, a pair of foot-operated up switches _S3 and down switches _S4 are provided at the front and rear of the base 1, respectively.

Front detection switch S ₁ and rear detection switch S ₂
As will be described later, these actuate the front supply reciprocating motion control means 30a and the rear supply reciprocation control means 30b, respectively.

Here, as shown in FIG. 2, the pre-feeding reciprocating motion control means 30a includes a reversible feeding material motor _M2 , an end passage detection switch _S5 , and a timer connected to the end passage detection switch _S5 . T ₁ , T ₂ , an edge passage detection switch S ₆ , and a timer T ₅ connected to the edge passage detection switch S ₆ .

Further, the reciprocating motion control means _30b for post-feeding, as _shown in parentheses in _FIG . Connected timers T ₃ , T ₄
, an edge passage detection switch _S5 , and a timer _T5 connected to the edge passage detection switch _S5 .

Incidentally, the reciprocating motion control means 30a, 30b can be easily constructed by a contact circuit using many relays,
Alternatively, it can be easily constructed by using a central control unit CPU.

The operation of the embodiment described above will be explained in detail with reference to FIGS. 3 and 4.

First, the case where the workpiece is fed from the front position will be explained.

At the front position, step on the foot-operated lift switch _S3 to raise the reversible material feeding device 9 by driving the lifting motor _M1 to open the material feeding path s between the material feeding guide surface 2a and the front detection switch _S1 . The gap is widened to allow the workpiece to be inserted, and the front end of the workpiece is inserted into the gap. In addition, when the material feeding path s has an interval that allows insertion of the processed material, the above operation can be omitted.

Next, the foot-operated lowering switch _S4 is operated to lower the reversible material feeding device 9, and the detection end of the front detection switch _S1 is brought into contact with the upper surface of the workpiece to close the front detection switch _S1 . The pre-supply reciprocating motion control means 30a is driven.

FIG. 3 shows an example of driving means for the front supply reciprocating motion control means 30a and the rear supply reciprocating motion control means 30b.

The operation of the pre-supply reciprocating motion control means 30a will be explained according to the configuration shown in FIG.

Circuit 31 is activated by turning on the front detection switch _S1 .
a closes, relay CR ₁ is activated, and the normally open contact
CR _1-1 is closed and the relay CR ₁ is self-maintained. Therefore, the normally open contacts CR _1-3 of the circuit 32a are closed, and the pre-supply reciprocating motion control means 30a is activated and driven. At this time, a normally closed contact CR _1-2 is installed in the circuit 31b, so after the front detection switch S ₁ is turned on, the rear detection switch is turned on.
Even if _S2 is closed, the reciprocating motion control means 30b for post-supply
is not driven. Therefore, when the front detection switch _S1 is turned on, the front supply reciprocating motion control means 30a is turned on.
only is valid. That is, this normally closed contact CR _1-2 constitutes a part of the control means selection mechanism 34 in the configuration of the present invention.

When the pre-supply reciprocating motion control means 30a becomes effective, the following operation occurs.

First, by closing the circuit 32a, the reversible material feed motor _M2 is driven, the material feeding belt 13 runs forward, and the workpiece is forwardly fed. When the front end of the workpiece passes, the end passage detection switch _S5 is turned on, and when the workpiece passes through the rear end, the switch S5 is deactivated. In this way, when the end passage detection switch _S5 detects the workpiece and releases the detection in sequence,
Timer _T1 and timer synchronized with the passing of the rear end
T ₂ is driven. Here, timer _T1 is a timer for stopping the reversible material feed motor _M2 , and the timer
_T2 is a timer for reversing the reversible material motor _M2 , and the set time limit of the timer _T2 is set longer than the set time limit of the timer _T1 .

Then, the processed material is forwarded by the material feeding belt 13,
As the time limit set by the timer _T1 described above expires, the driving of the lifting motor _M1 is stopped, and the timer T1 also stops driving.
The set timed extinguishing of T ₂ causes reverse feeding of the reversible material motor M ₂ . By creating a time difference between the timers T ₁ and T ₂ in this manner, the lifting motor M ₁ is reliably stopped and then reversely fed, thereby reducing the load on the reversible material motor M ₂ .

By this reverse feeding of the workpiece, the lower surface of the workpiece is cut by the cutting blade 4.

By forward feeding of the workpiece, the leading edge of the workpiece is detected by the end passage detection switch S ₆ , and when the workpiece is fed backward, the tip of the workpiece is detected by the end passage detection switch S ₆
When the leading edge of the workpiece is retracted and the detection is canceled, the timer _T5 is activated. After the front end of the workpiece passes over the cutting blade 4, the timer
When the set time period _T5 expires, the normally closed contact _T5-1 of the circuit 32a is opened, the drive of the pre-feeding reciprocating motion control means 30a is stopped, and the reversible material motor is
_M2 stops driving and each relay etc. returns to its initial state.

Thus, the cutting process in feeding the workpiece to the front side is completed.

The above-mentioned operation timings are clearly shown in the time chart of FIG.

When reciprocating cutting is performed by feeding the workpiece from the rear, the switches S ₃ and S ₄ are operated to place the workpiece in the workpiece passage S and the rear detection switch S ₂ is operated.
and closing the circuit 31b.
The circuit 32b is closed and the circuit 32a is opened to operate the post-supply reciprocating motion control means 30b.

The only difference in the operation of the rear feeding reciprocating motion control means 30b is that the reversible feeding device 9 sequentially generates a reverse feeding drive and a forward feeding drive.
different from. The configuration also includes a front detection switch _S1 .
is the rear detection switch S ₂ and the end passage detection switch
_S6 is equidistant with the end passage detection switch _S5 , the timer _T3 is equidistant with the timer _T1 , and the timer _T4 is equidistant with the timer _T2 .

Furthermore, the circuit 31a in FIG. 3 has a normally closed contact.
CR _2-2 is interposed, and therefore, after the rear detection switch S ₂ is turned on, even if the front detection switch S ₁ is closed, the front supply reciprocating motion control means 30a is not driven. Therefore, when the rear detection switch _S2 is turned on, only the rear supply reciprocating motion control means 30b becomes effective. That is, this normally closed contact CR _2-2 and the normally closed contact CR _1-2 constitute the control means selection mechanism 34 in the configuration of the present invention.

As described above, the configuration and operation of the rear supply reciprocating motion control means 30b are the same as those of the front supply reciprocating motion control means 30a, and a description thereof will be omitted.

In this configuration, when a workpiece is supplied to the superfinish planing machine from the front, only the front supply reciprocating motion control means 30a is activated by turning on the front detection switch _S1 provided at the front entrance end. As a result, backward feeding, reversal, and forward feeding occur in sequence to finish the workpiece, and when the workpiece is fed from the rear, the rear detection switch S ₂ provided at the rear entrance end is turned on. As a result of the operation, only the reciprocating motion control means 30b for post-feeding becomes effective, and its forward feeding, reversal, and backward feeding occur in sequence, and the workpiece is finished. Therefore, even if the workpiece is supplied from either the front or the back of the super-finishing planer, reciprocating movement and cutting are possible.

In the embodiment described above, the timers T ₂ and T ₄ may have shorter set time periods, and may be operated at the same time as the set time limits of the timers T ₁ and T ₃ expire.

Further, the timers T ₁ and T ₃ may be replaced by counters that detect the rotational speed of the reversible material motor M ₂ or the rolls 11 and 12.

Furthermore, timers T ₁ , T ₂ and timers T ₃ ,
It is also possible to use one T ₄ for each and reverse rotation immediately after the reversible material motor M ₂ stops driving.

In addition, although the above embodiment is applied to a bottom-cutting type super-finishing planer for woodworking in which a reversible material feeding device 9 is disposed on the cutting blade 4, top-side cutting may also be used, and the cutting method is not restricted. .

Further, although the distance between the reversible material feeding device 9 and the material feeding guide surface 2a was adjusted by raising and lowering the reversible material feeding device 9 in the above embodiment, it may be done by raising and lowering the material feeding guide surface 2a, and the adjustment can be made by raising and lowering the material feeding guide surface 2a. The means can be selected as appropriate.

<Effects of the Invention> As described above, the present invention is a super-finishing planer for woodworking that cuts workpieces in a reciprocating motion, and the workpieces can be supplied from either the front or the rear. , No matter whether the pre-processing position for rough cutting etc. is in the front or back of the woodworking super finishing planer,
Since the processed material can be supplied from this position, the burden on the worker is significantly reduced, and there are excellent effects such as being able to easily design the wood processing line.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, and FIG. 1 is a side view of a super finishing planer for woodworking, FIG. 2 is a circuit diagram showing the drive control means for the reciprocating motion control means 30a and 30b, and FIG. 3 is a reciprocating motion control means. FIG. 4 is a block diagram showing the configuration of the control means 30a, 30b, and a time chart. 2a; material feeding guide surface; 4; cutting blade; 9; reversible material feeding device; 13; material feeding belt;
31a, 31b, 32a, 32b; circuit, 34;
Control means selection mechanism, s: Material feeding path, _T1 to _T5 : Timer, _S1 : Front detection switch, _S2 : Rear detection switch, _S5 , _S6 : End passage detection switch.

Claims (1)

[Claims] 1. A reversible material device comprising a material feeding belt stretched between a drive roll driven by a reversible material motor and a driven roll, and a material feeding guide surface equipped with a cutting blade. In a woodworking super-finishing plane machine which is arranged so as to be relatively movable apart by a lifting motor and has a material feeding path between the reversible material feeding device and the material feeding guide surface, the front part of the material feeding path is The front detection switch installed at the entrance end, the rear detection switch installed at the rear entrance end of the material feeding path, and the front detection switch become effective when the workpiece is detected, and the reversible feeding motor is driven to perform reversible feeding. A front supply reciprocating motion control means that causes the material feeding device to be driven forward, and when the rear end of the workpiece passes the position of the cutting blade, switches and controls a reversible material motor to produce the reverse drive; and a rear detection switch. It becomes effective when the workpiece is detected, and the reversible material motor is driven to cause the reversible material device to be driven in reverse, and when the front end of the workpiece passes the cutting blade position, the reversible material motor is switched and controlled to start its forward feed. The present invention is equipped with a reciprocating motion control means for rear supply that generates a drive, and a control means selection mechanism that disables the other switch when one of the front detection switch and the rear detection switch is turned on first. Features a reciprocating cutting device in a super finishing planer for woodworking.