JPS5845856A - Top face grind type belt sander machine - Google Patents

Abstract

PURPOSE:To precess both faces of a work object efficiently with a single faced belt sander machine by detecting the rear end of the work object, separating an elevation table, reversing a conveyance belt, turning over the work object manually, then proceeding the conveyance belt again. CONSTITUTION:An elevation table 12 lifted or lowered with a feed screw 14 driven by an elevating motor M2 is provided below a sanding belt 5, and a conveyance belt 13 driven by a reversible motor M1 is provided on the elevation table 12. A separation H is set by a limit switch LS1 for the elevation table 12, and the conveyance belt 13 is rotated in the normal direction to grind the top face of a work object. When a detection switch LS2 detects the rear end of the work object, the elevation belt 12 is lowered, then the conveyance belt 13 is reversed to return the work object to a feed section. Next, the elevation table 12 is lifted, the work object is turned over by an operator, the conveyance belt 13 is rotated in the normal direction, thus the other face of the work object is grinded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a supply section (1) in which a material feeding device that can be raised and lowered at intervals between materials is provided at the lower part of a sanding belt that is tensioned around a belt drive guide mechanism. After grinding the upper surface of the workpiece sent from the machine, the reciprocating movement of the workpiece is sent back to the supply section (1) is controlled, and the workpiece is turned over in the supply section and similarly ground, thereby grinding both sides of the workpiece. This relates to a belt sander machine.

Traditionally, double-sided grinding of ζ-processed materials uses a top-grinding type wide belt sander, and after grinding one side, the processed materials are transported from outside the machine to the supply side again, and then turned upside down and fed into the material feeding device.
This was done by re-grinding, which was extremely inefficient. In addition, in order to improve work efficiency, the process may be performed using a double-sided belt sander machine that combines upper and lower surface grinding, but the double-sided belt sander machine requires a large machine footprint and is expensive. There was a drawback.

The present invention was invented to correct the above-mentioned conventional drawbacks, and the first invention is to grind the upper surface of the workpiece by moving the material feeding device in the forward direction, then lowering the material feeding device, and grinding it in the reverse direction. The traveling is controlled so that the upper surface of the workpiece does not come into contact with the grinding surface of the sanding belt, and the workpiece is sent back to the feeding section (1), where the workpiece is moved upward and forward, allowing time for the workpiece to be taken out or turned over. We provide a top-grinding type belt sander machine that automates the series of operations of controlling the travel and grinding the new top surface of the workpiece, allowing continuous hardening on both sides of the workpiece, and with a small installation area. The purpose is to apply it using a simple and inexpensive device.

Further, the second invention provides the above-mentioned top surface grinding type belt sander equipped with a counter for indicating the number of times of grinding on one side, and arbitrarily sets the required number of times of grinding on each side, thereby further enriching the mtth invention. This is the purpose.

An embodiment of the invention will be described with reference to the accompanying drawings.

In Fig. 1, l is a main body frame, and c is a sanding frame provided on the upper part of the frame l, in which a tension roller 3 is mounted on the upper part, and a contact row roller driven by a motor is mounted on the lower part. 3. Pass the sanding belt S using q as a drive guide mechanism.

Reference numeral 6 denotes a suitable number of presser rolls provided on the main body frame l at the front and rear of the contact row rim, which are urged downward by springs 7. A pressure roll r is provided near the front of the contact roller q. A detection switch LS2 is attached to the roll g to detect vertical movement caused by the passage of the front end or rear end of the workpiece. The presser roll l may use a part of the presser roll 6, and the presser roll 9 is a front driven roll 10 and a reversible motor M.
This is a material feeding device in which a rear driving roll l/ driven by 1 and a rear driving roll l/ are mounted on an elevating table l-, and an endless material feeding belt 13 is wrapped around both rolls /'0 and /l. Lifting screw /u rotated by rotating lifting motor M2
It is supported for lifting and lowering by the main body frame l. An initial position detection switch LS is attached to the guide column 16 on the main body frame L so that it can be moved up and down, and an engaging element corresponding to the detector of the detection switch LSI is attached to the lower part of the lifting table saw. 17 is installed vertically, and when the material feeding device 9 is lowered to a certain position, the engaging element 17 turns on the detection switch LS.

As will be described later, the detection switch LS stops the lifting motor M2 when it is turned on, and the sump material interval H is narrower than the thickness S of the workpiece by the initial grinding portion S]△ (S-8, ) The material feeding device 9 is stopped at an initial position with an interval of . The position of the detection switch LS is determined by placing the model material on the material feeding device 9, and manually rotating the lifting screw 1/& until the model material comes into contact with the grinding part (■) of the sanding belt S. 9 is moved upward, then the detection switch LS is moved, and the detector of the switch is brought into contact with the engager 17 to confirm the ON operation, and then further raised slightly by a height corresponding to the grinding allowance for guidance. Adjust by fixing it to the support post LB.

The operation of the present invention will be explained based on the circuit diagram of FIG.

Move the material feeding device 9 up and down and detect the engaging element 17 by pressing the detection switch LS.
When the activation push button PB is pressed while stopped at the initial position where it is in contact with the detector of The motor M1 is rotated in the normal direction to cause the material feeding device 9 to travel in the normal feeding direction.

At this time, the relay cR8 of the circuit 27 is activated, and the switch PB is activated to close the normally open contact CR8-+ of the holding circuit.
Even after the motor M1 is turned off, the normal rotation of the motor M1 is maintained.

When the workpiece fed from the supply section (1) to the workpiece feeding device 9 advances and its front end f raises the pressure roll "t", turning on the detection switch LS2, the normally open contact of the workpiece detection circuit 2 is turned on. Closing of relay r and opening of normally closed contact LS2-2 occur, and at this time relay CRg (7) mentioned above.

Since the normally open contact CR8-2 is closed by this drive, the relay CR1 is driven, and the contact CR, -t is closed to close its self-holding circuit, and at the same time, the normally open contact CR1- of the drive circuit of the relay CR2 is closed. Close 2.

When the workpiece further advances and the rear end r passes the suppression roll t, the detection switch LS2 returns, and the normally closed contact LS2-z of the detection circuit returns to closed state. The relay CR,
Since the normally open contact CR, +2 is already closed due to the drive of the relay CR2, the timer drive circuit 2 is driven.
The normally open contact CR2-1 is closed and the normally open contact CR2-1 is closed by the drive of the relay CR8 of the forward feed command circuit λ7 which has already occurred.
8-3 causes the timer Tl to be driven.

The timer T is set to have a time limit in conjunction with the detection of the rear end of the workpiece by the detection switch LS2 so that the timer expires in synchronization with the passage of the rear end r of the workpiece through the grinding section (seal). Therefore, when the rear end r passes through the grinding section (1), the normally open contact TI''1 of the forward feed stop command circuit 23 is closed, and the relay CR3 is driven.

The drive is self-maintained by closing the normally open contact CR3-+ of the holding circuit.

When relay CR3 is activated, the normally closed contact CR3-2 of the forward feed command circuit 27 is opened to release the normal feed command magnet r, causing the reversible motor M to stop, and the normally open contact of the descending command 1g circuit 29 is opened. CR3-3 is closed to drive the lowering command magnet D for circuit switching, and the lifting motor M2 is driven in reverse to control the stopping of the material feeding belt 13 and the lowering of the material feeding device 9.

If the detection switch LS2 is attached to the presser roll 6' at the rear of the grinding section (1), the material feeding may be stopped and the material feeding device 9 may be lowered at the same time as the detection of the detection switch LS2. T becomes unnecessary.

The drive of the command circuit 23 t-CR3 closes the normally open contact CR3-4 of the counter circuit 33, and the lowering amount counter C1 is driven. The counter C is provided on the output shaft of the lifting motor M2 and counts the number of pulses from the detection element TD, which generates a pulse every time the motor rotates at a certain angle. When this occurs, the cumulative number of pulses reaches the set number, and the normally closed contact C1-2 of the descending command circuit 29 is opened to stop the lifting motor M2 by releasing the drive of the magnet D, and then reverse the cycle. The normally open contact C1-1 of the running command circuit-g is closed to drive the reverse running command magnet R, causing the reversible motor M1 to be driven in reverse to run the workpiece in the reverse direction. At this time, the circuit -t
The relay CR9 is driven by the closing of the relay CR9, and its holding circuit is held by the closing of the normally closed contact CR9-. In place of the counter C1, a timer T3 may be used, which expires when the material feeding device 9 moves downward.

By lowering the material feeding device 9, the processed material passes through the grinding section (■) without contacting the sanding belt S with its upper surface, and is sent back to the supply section (1), and the rear end r pushes the pushing I east roll t. This causes the detection switch LS2 to turn on. The normally open contact CR9''l of the workpiece detection circuit 21 is already closed by the drive of the relay CR of the reverse run command circuit 21, but the normally open contact LS2-+ is closed by the drive of the relay C.
R, is driven, and then the detection switch LS2 is reset by the passage of the front end f of the workpiece, which closes the normally closed contact LS2-2 and relay CR'.

generates a drive.

C4 is a single-sided grinding number indicating counter according to the second invention, which has a normally closed contact CR14-4 and a normally closed contact T2.
-2 are connected in series to form a single-side grinding frequency indicating circuit 35. The counter C4 is used to grind the workpiece by arbitrarily setting the number of times of grinding on one side, but in a model whose only purpose is to grind the workpiece one time on each side, the circuit 35 is Not necessary. In this case, except for the circuit 3S, normally open contacts CR2-2, CR8=,
and timer T2 may be inserted in series.

The case where counter C1 is used will be further explained.

The counter C4 is connected to the relay C of the forward feed command (b) path 27.
Each time H8 is driven, the count-up of the rising counter C2 (normally open contact C2-
1), a counting operation is generated every time a closing of 1 occurs.

When the m-counter C4 does not complete counting the set number of times, the workpiece moves in the opposite direction and the relay C is activated as described above.
When R9 and CR2 are driven individually, the normally open contacts CR2-2 and CR9-4 of the three circuits are closed, and the counter C4 is not counting up, so the normally closed contact C
4-2, the relay CR13 is driven, and as a result of this driving, the normally open contact CRI3''I of the drive circuit 31 is engaged, and the relay CR,2 is driven.

For this reason, I ordered a backward run lil! Normally closed contact CR12 of l path 2j
-3 is opened to release the reverse run command magnet D, stop the reversible motor M1, and stop the reverse run of the material conveying belt 13, and the normally open contact CR12-3 of the ascent command circuit 30.
is closed to drive the ascending command magnet U, thereby controlling the ascending of the material feeding device 9 by normal rotation of the ascending and descending motor M2.

When the detection switch LS2 is attached to the presser roll 6' behind the grinding section (1), the switch drives a timer, and when the front end of the workpiece passes through the grinding section (1), the set time period expires and the above-mentioned Stopping the material conveying belt 13 and the material conveying device 9
cause an increase in

The counter circuit 3q is activated by driving the relay CR,2.
Since the normally open contact CR12-4 is closed, when a pulse is generated from the detection element TD by driving the lifting motor M2, the counter C2 of the circuit 3q counts the pulse, and when the cumulative number or the set number is completed, , forward feed command circuit,
The normally open contact C2''-1 of 27 is closed to drive the double feed command magnet F, and the reversible motor M1 is driven to stop rotation, and the normally closed contact C2''-2 of the ascending command circuit 30 is opened to drive the lifting motor M2. For this reason, the lifting amount h2 of the material feeding device is set to be higher than the first grinding thickness S2 than the one-work material height h1. As the material device 9 rises, the material feeding interval S-8, -32H becomes (Mu = Mao).

Increase amount h2 by timer T4 instead of counter C2
may be determined.

The workpiece is repeatedly moved back and forth by the reversible motor M until the number set on the counter C4 is reached, and the ladle feeding device 9 is lowered by the amount of descent h1 detailed above for each round trip.
By repeating the increase by the increasing amount h2, the material feeding interval H is reduced to the grinding thickness S.
Narrow the workpiece by 2 and grind the workpiece a predetermined number of times.

At the final time when the set number of the counter C4 has expired by increasing the predetermined number of times of the material feeding device 9, the processed material is transferred to the supply section (1).
When the rear end r turns on the detection switch LS2 and the front end f passes, the normally open contacts CR2-2CR and -4 of the circuit 32 close as before, but in the final cycle. As the material feeding device 9 rises, the counter C4 counts up, causing the contact C4-2 to open and the contact C4"'I to close, so the relay CR13
The timer T2 is driven without driving the timer T2. Therefore, the reverse feed stop circuit 31 is not closed, and the workpiece continues to be fed backward until the set time of the timer T2 expires. Therefore, the workpiece is removed from the supply section (1) within this set delay time.

When the set time limit of the timer T2 expires, the drive circuit 31
The normally open contact T2-3 of is closed to drive the relay CR,2, the normally closed contact CR12'''2 of the reverse feed command circuit 2g is opened, and the normally open contact CRI2-3 of the upward command circuit 3o is opened. This causes the reverse feed to stop and the height h2 to rise as described above, and the feed interval H becomes (Taketomi ± 42 degrees).
Here, n indicates the same number set on the counter C4. ) When the lifting of the material feeding device 9 is completed, the normally open contact C2""1 of the forward feed command circuit 27 is closed in synchronization with the lifting of the material feeding device 9, and the reversible motor M,
rotates in the normal direction, causing the forward direction of the material conveying belt 13, so that the processing ladle taken out of the machine is turned over manually or by a desired machine and fed again to the supply section (+).

The contact T2-2 of the one-sided grinding equal number indicating circuit 3S is once opened when the timer T2 of the circuit 32 times up, so the cumulative number of the counter 04 returns to zero, and therefore the back side of the workpiece is also ground n times, which is the set number of the counter C4. Grinding is performed.

At the final cutting on the back side, the material bag @q rises to a height h2, and when the counter C4 counts up, the normally open contact C4-3 of the drive circuit roller closes. At this time, due to the time-up of the timer T2 of the three circuits activated when the grinding of the surface is completed, the normally open contact T2- of the single-side grinding completion circuit λS
1 is closed, and on the other hand, the relay CR6 is driven and held, so the normally open contact cRs +2 of the circuit λ6
is closed, and therefore, the relay CR7 of the circuit roller is driven by the closing of the contact C4-3, and self-maintained by the closing of the normally open contact CR7-+ of the holding circuit.

After the final grinding of the back side has been carried out, the timer T of the drive circuit, which is turned on by the forward movement of the workpiece, is set to the time when the rear end of the workpiece passes through the grinding part (circle). When the contact "l"-1 of the circuit 23 is closed, the normally closed contact OR, +2 of the circuit 23 is opened by the drive of the relay CR, and both sides (DV cutting end circuit 2
41 normally open contact CR7-3 closes.

This causes the relay CR3 to be deactivated and the relay CR4 to be activated, and the relay CR4 is the normally open contact CR4 of the holding circuit.
−, is self-maintained by the closure of .

When the relay CR4 is driven, the lowering command F path j9
The normally open contact CR4-3 closes and the material feeding device 9 descends. However, since the force 1 runner circuit 33 is not closed due to the non-driving of the relay CR3, the material feeding device 9 is lowered by the engaging element 17 to the initial position where the detection switch LS is turned on. Close the normally open contact LS, +4 of circuit 36. Since the normally open contact CR4-4 of the relay CR4 is already closed, the relay CR,
4, and the drive is maintained by closing the normally open contacts CR, 4-, of the holding circuit. Therefore, the descending command circuit 2
9's normally closed contact CR14"-2 opens and the lifting motor M
2 stops, and the material feeding device 9 is positioned at the initial position.

Also, by opening the normally closed contact CR14-3, the circuits 23-2
6 is opened, and as a result, the normally closed contact CR4-2 of the workpiece detection circuit 21, which was once opened, suddenly returns to the closed state.

During this time, the forward feed command circuit 27 remains closed, so the forward feed of the material conveying belt 13 continues, and the workpiece that has been ground is sent out backward, and the next workpiece is transferred to the supply section (1).
He is sent to the hospital. As the new workpiece is advanced, the detection switch LS2 of the workpiece detection circuit 21 is actuated to drive the relay CR, which opens the normally closed contact CR, -a of the drive circuit 23 and turns off the relay CR14. Therefore, normally closed contact CR, 4-3 returns to close, and circuit 2
3 to 26 return to their original states.

After the completion of ω1 cutting, the workpiece further travels in the opposite direction to the supply position (1
). Although this circuit is easy to construct, its detailed explanation will be omitted.

As clarified in the above description, the first invention is to grind the surface of the workpiece in the forward process using a top-grinding type belt sander machine, and lower the material feeding device 9 in the return process to process the workpiece. The sanding belt S travels in the opposite direction so that its upper surface does not come into contact with the grinding part (1) of the sanding belt S, and the workpiece is delivered to the supply part (1).
), a certain delay time t is generated, the workpiece is turned over within that time, and the top surface is then ground anew.This method enables double-sided grinding of the workpiece with a small installation area and The second invention has an excellent effect that can be performed continuously by a simple and inexpensive configuration, and furthermore, the second invention is such that the workpiece is reciprocated by a single-side grinding number indicating counter C4 until the number set in the counter C4 is completed, and each - During each reciprocation, the material feeding device 9 is raised to narrow the material feeding interval H by one grinding section S2, and the workpiece is ground a set number of times, and when the set number is completed, it is returned to the supply section (1). Since a certain delay time t is generated, the workpiece is turned over within that time, and the new upper surface is ground the same number of times as above, it has an excellent effect in that an arbitrary amount of grinding can be performed on both sides of the workpiece. There is.

[Brief explanation of the drawing]

The accompanying drawings show one embodiment of the present invention, and FIG. 7 is a side view, and FIG. 2 is a circuit diagram. j→sanding belt, l→press roll, tar/material feeding device, 12-lifting table,! 3'-Material feed belt, LS
, , LS2 → detection switch, M1 → river reverse motor, M
2 → Lifting motor

Claims (1)

[Claims] (1) A belt sander machine in which a material feeding device is installed below a sanding belt that is tensioned around a belt drive guide mechanism, and a material feeding device is formed by wrapping a material belt between a driving roll and a driven roll with a feeding interval between the sanding belt and a driven roll. ii) a reversible motor M that reversely rotates the driving drive roll; and an elevator motor M that reversibly rotates an elevator screw that supports the material feeding device so as to be able to move up and down.
2, when the material feeding device descends to a certain position, it turns on, releases the △ drive of the lifting motor, and returns the vertical position of the material feeding device to the initial feeding position.
S81 Initial position detection switch Ls is set so that the distance between the materials is narrower than the grinding distance between the materials and the plate. and a detection switch LS2 that detects passage of the rear end of the workpiece and stops the reversible motor M1 and lowers the material feeding device when the rear end of the workpiece passes the grinding section (1), and the material feeding device. A counter C1 or a timer T3 that detects the descent of the device at a constant descending speed hl and causes the descent to stop and the reversible motor M1 to reverse rotation, and the detection switch LS2 for the workpiece to be transported in reverse by the reverse drive of the reversible motor M1. The front end of the workpiece is driven by the detection of the passing of the front end by the grinding part (
1), the reversible motor M1 is delayed by a certain time f.
The timer T2 causes the drive of the lifting motor M2 to be released and the material feeding device to be raised by driving the lifting motor M2. and a counter 02 or a timer T4 that controls the normal rotation of the reversible motor M, and after the surface of the workpiece has been ground, the supply unit (1) is caused to return by reverse feeding by the material feeding device, and the timer T2 A top surface grinding type belt sander machine is characterized in that the workpiece is turned over and further ground after a delay time t due to 0 (λ). A belt sander equipped with a material feeding device in which a material feeding belt is stretched between a drive roll and a driven roll at a material interval, and a reversible motor M that reversibly rotates the drive roll; A lifting motor M2 that rotates a lifting screw that supports the device so that it can be raised and lowered, and an initial position detection that is set so that a certain position of the material feeding device is a narrow position for grinding the workpiece σ)/Pν. switch L
S, a detection switch LS2 that detects passage of the rear end of the workpiece and stops the reversible motor M1 and lowers the workpiece feeding device when the rear end of the workpiece passes the grinding section (1); A counter C that detects the descent of the material feeding device by a certain amount h1 and causes the descent to stop and the reversible motor M1 to reverse rotation.
1 or timer T3, and while the set number of grindings has not been completed, the reversible motor M1 is driven in reverse as soon as the front end of the workpiece to be sent in reverse passes the grinding section (l).
, and a one-sided grinding count indicating counter C4 that can arbitrarily set the number of single-sided grinding operations by causing the drive of the lifting motor M2 to be released and the material feeding device to be raised by driving the lifting motor M2;
Upon expiration of the set number of the instruction counters, the detection switch LS2 detects passage of the front end of the workpiece to be reversed, and when the front end of the workpiece passes the grinding section (1), the reversible motor M is activated after a certain time t delay. , and the timer T2 that causes the lifting motor M2 to lift the material feeding device, and the descending amount h1 of the material feeding device.
The grinding unit consists of a counter C2 or a timer T4 that detects a rising amount h2 that is higher by $2 and controls the stopping of the rise and the forward rotation of the reversible motor M, and the material is sent after grinding the same surface of the workpiece 7 to several times. An upward grinding type belt characterized in that the feed section (1) is caused to return by reverse feeding by the device, and the workpiece is turned over when l1IJt is delayed by the timer T2, and the back surface is further ground the same number of times. Thunder machine.