JPS6160550A - Transport and pressing device in positioning end edge of veneer - Google Patents

Abstract

PURPOSE:To reduce the speed of a veneer in a short time and to reliably position the veneer by forcedly pressing the veneer at every deceleration from high speed to low speed, and stopping the pressing every time the veneer reaches the second detector to position the veneer. CONSTITUTION:When a veneer 1 transported at high speed reaches a veneer detector 4, and the leading end of the veneer in the transport direction is detected, a signal is generated from the detector 4 to be input to a memory element of a control circuit, and an output signal is generated. The output signal is input to a solenoid clutch 15 to turn transport belts 2, 2a at low speed, and the signal generated from the detector 4 is input to a memory element to generate an output signal. When a solenoid valve is operated to retreat a piston of an air cylinder 7b, an open-and-close body 7a is also retreated, and a pipe connecting a suction box 6 and an aspirator 5 is open to start sucking from the suction box 6. Thus, the veneer 1 is sucked and supported by an elongated hole 2c to be transported, whereby even if the veneer is reduced in speed from high speed transport to low speed transport, the veneer can be put in the low speed state at a short distance in a short time without wearing to be reliably positioned.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in an automatic veneer veneer (hereinafter referred to as veneer) edge positioning device in an automatic veneer assembly device and an automatic gluing device. During edge positioning, each time the veneer is decelerated from a high speed to a low speed state, by preventing wear between the conveyor belt and the veneer, the veneer can be positioned at a low speed in a short time and the veneer can be positioned more reliably. It is something to do.

Conventionally, for example, in an automatic plywood gluing device or an automatic assembly device, there is a device 1 for accurately overlapping the edges of the middle veneer and the front and back veneers, or the edges of the front and back veneers. 6
No. 7444 (method for positioning the edge of a thin plate), etc. However, when this device decelerates the veneer from high speed to low speed to position the edge of the veneer, the material of the veneer is not uniform, so the conveyance is difficult. It took a long distance and time for the belt and the veneer to wear apart and reach a low speed state.

In order to eliminate the above-mentioned drawbacks, the present invention forcibly applies pressure each time the speed is decelerated from high speed to low speed, and stops applying pressure each time a veneer in a low speed state reaches the next detector. The present invention provides a device for positioning the edge of a veneer.

The present invention will be described in detail below based on examples. As illustrated in FIG. 1, the veneer veneer 1 is conveyed in a direction perpendicular to the veneer fibers by at least two conveyor belts 2.2a on the left and right sides. The conveyor belt 2.2a is looped around a pulley 3.3a.

Is the conveyor belt wrapped around the pulley 3.3a? , 2a is equipped with a pressure device 7 capable of suction on the back side of the veneer conveying surface. The pressure device 7 includes a suction surface 6 of an appropriate length along the conveyance zone on the back side of the veneer conveyance surface of the conveyance zone 2.2a, and a suction device 5 of a vacuum device that continues to apply suction to an appropriate position along the conveyance zone. 5 and the suction surface 6, an air cylinder 7b that opens and closes the pipe based on a signal, and the air cylinder 7b.
The opening/closing body 7a is connected to the opening/closing body 7a. When the suction surface 6 and the suction device 5 are connected through the pipe, suction is drawn through the elongated hole 2c of the conveyance belt 2.2a, and if the connecting portion is shielded, the elongated hole 2C of the conveyance belt 2.2a is sucked. The suction is stopped. A back-and-forth movable opening/closing body 7a for shielding the pipe is provided near the suction machine 5, and the opening/closing body 7a is connected to the piston of the air cylinder 7b. 7a also moves back and forth.

That is, when the opening/closing body 7a moves backward, the pipe is opened and suction starts, and when the opening/closing body 7a moves forward, the pipe is closed and suction is stopped.

Of course, in addition to the suction surface 6, a plurality of pipes, hoses, etc. may be provided along each of the conveyance belts 2.2a, each having a plurality of suction holes at approximately the same height as the veneer conveyance surface or at a slightly lower position. .

Further, the conveyance belt may be a slotted belt, a chain, a round belt, or the like.

A signal for detecting the arrival of the veneer 1 and decelerating the conveyor belt 2.2a from high speed to low speed, and a signal for pressurizing the veneer to the 1112 conveyor belt are installed near the conveyor belt 2.2a. A single plate detector 4 is provided to transmit the signal.

The single plate detector 4 may be a limit switch, a phototube, a photoelectric switch, a proximity switch, etc.

A control mechanism is provided near the pulley 3 to reduce the speed of the conveyor belt 2.2a, which is looped around the pulley 3.3a, from high speed to low speed. The control mechanism consists of a transport mechanism 11 that rotates at high speed, a transport mechanism 12 that performs low speed transport, and a third intermittent device that rotates or stops the transport belt 2.2a in the low speed state. and an electromagnetic clutch 13, which is a first intermittent device, are directly connected. A gear 9b is fitted to the output shaft of the electromagnetic clutch 13, which is the first intermittent device, and the gear 9b is connected to the gear 9 fitted to the shaft 10.
c is connected by a chain 9e or the like. Similarly, the gear 9a fitted to both ends of the shaft lo and the gear 9 fitted to the inlet of the electromagnetic clutch 8 which is a third intermittent device placed at an appropriate position are connected by a chain 8e or the like. There is.

Moreover, the above-mentioned pressurizing device, the 111th Iw! The control of the device, the second intermittent device, the third intermittent device, etc. is controlled by a control circuit 23 composed of an AND element, an OR element, and a memory element, as illustrated in FIG. That is, the clutch of the electromagnetic clutch 13, which is the first intermittent device, is engaged by a signal from 24c of the memory element 24, which is the control circuit 23 (31d of the OR elements 31, 32, which are the control circuit 23,
32d, the clutch of the electromagnetic clutch 8, which is the third intermittent device, is in the engaged state), so the boo 9-3, which is fitted to the output shaft of the electromagnetic clutch 8, which is the third intermittent device, moves at high speed. The carrier 2.2a is rotated at a high speed. At this time, since the signal from 24d of the memory element 24, which is the control circuit 23, is not output, the clutch of the electromagnetic clutch 15, which is the second intermittent port of the transport mechanism 12, is in a disengaged state.

Similarly, the transport mechanism 12 has a low speed motor 14 and a second
It is directly connected to the electromagnetic clutch 15 which is an intermittent device,
Based on the detection signal of the single plate detector 4, when the clutch of the electromagnetic clutch 15, which is the second intermittent device, is engaged by a signal from 24d of the memory element 24, which is the control circuit 23, the clutch is engaged with the output shaft of the electromagnetic clutch 15. The signal is transmitted from the gear 8a fitted to the combined gear 9a and the other shirt 10 to the gear 9 fitted to the input shaft of the electromagnetic clutch 8, which is the third intermittent device, by the chain 8e. The pulley 3 fitted to the output shaft of the electric clutch 8, which is an intermittent device, is rotated at a low speed, and the conveyance belt 2.2a is rotated at a low speed. At this time, the electromagnetic clutch 13, which is the first intermittent device of the transport mechanism 11, is disengaged.

As mentioned above, when the clutch of the electromagnetic clutch 13 which is the fiS1 intermittent device of the transport mechanism 11 is engaged, the transport mechanism 1
When the clutch of the electromagnetic clutch 15 which is the second intermittent device of the transport mechanism 12 is engaged, the electromagnetic clutch 15 which is the second intermittent device of the transport mechanism 11 is engaged. This is because the clutch 13 is disengaged.

Further, the electromagnetic clutch 8, which is the third intermittent device @2, is in an engaged state.

The veneer detectors 4 are provided separately on the left and right sides in the direction orthogonal to the conveyance direction of the conveyance belt 2.2a on the downstream side of the veneer detector 4, and detect either the front end or the rear end in the conveyance direction of the veneer 1 in a low speed state. Temporary correction: 51 single plate detector 16 is provided. The first veneer detectors 18 are arranged separately in left and right directions perpendicular to the conveying direction of the conveying belt 2.2a17), and the first veneer detectors 16
A signal for stopping the rotation of the conveyance belt on the side detected by the light from when one of the first veneer detectors 16 performs a detection operation until the other first veneer detector 16 performs a detection operation. A signal is sent to stop the suction. .

Of course, the suction stop signal may be generated almost simultaneously with the detection operation of the first veneer detector 16, or other detectors may be provided before and after the Jl veneer detector, in short, when the veneer 1 is in a low speed state. If so, you can take a break.

A second veneer detector 17 is provided at a predetermined interval on the downstream side of the first veneer detector 16 in the transport direction. The second veneer detectors 17 may be provided separately on the left and right sides in the direction perpendicular to the conveyance direction of the conveyance belt 2.2a, or may be provided on one side of the conveyance belt 2.2a.

The first veneer detector IB and the second veneer detector 17 described above may be a limit switch, a phototube, a photoelectric switch, a proximity switch, or the like.

Next, the above-mentioned action will be explained in detail for the veneer 1.

After being conveyed in the direction of the fibers of the veneer and brought into contact with a stopper in the previous step (not shown), the veneer is conveyed at high speed in a direction perpendicular to the fibers of the veneer, or it is directly conveyed in the direction perpendicular to the fibers of the veneer in the conveying belt 2.
2a, it is transported at high speed. The veneer 1 transported at high speed is detected by a veneer detector 4 provided near the conveyance belt 2.2a that detects the arrival of the veneer and sends a signal to change the speed from high speed to a low speed state and a signal to start suction. reach. When the veneer detector 4 detects the front end of the veneer l in the conveyance direction, the veneer detector 4 issues a signal. The signal emitted from the single-plate detector 4 is input to 24a of the memory element 24 of the control circuit 23 illustrated in FIG.
An output signal is emitted from the second
The conveyance belt is inputted to the electromagnetic clutch 15 which is an intermittent device? , 2a are rotated at low speed, and the signal emitted from the single plate detector 4 is inputted to 25a of the memory element 25 of the control circuit 23 illustrated in FIG.
When an output signal is emitted from and a solenoid valve (not shown) for retracting the piston of the air cylinder 7b is actuated to retract the piston of the air cylinder 7b, the opening/closing body 7a also retracts, and the suction interior 6 and The pipe connected to the suction device 5 is opened, and suction is started from the suction chamber 6 provided on the back side of the veneer conveyance surface of the conveyance belts 2, 2a. As a result, the veneer 1 is moved through the elongated holes 2 and 2a of the conveyor belts 2 and 2a.
Since the material is suction-supported and transported at C, even if the speed is reduced from high-speed transport to low-speed transport, the low-speed state is achieved over a short distance and in a short period of time without wear.

Next, the veneer l in the low speed state reaches the first veneer detector 16 which detects the front end of the veneer in the conveying direction. The first single plate detector 1
When the veneer 6 detects the front end of the veneer in the transport direction, the first veneer detector 1B sends a signal to stop the rotation of the transport belt 2.2a and a signal to stop the suction. When the veneers l arrive at the left and right first veneer detectors IB at the same time, the signals from the left and right first veneer detectors 1G are sent to the AND elements 26.27.2B(7) 26a of the control circuit 23. ,
28b, 27b, 28b, but since no signal is output from 26d of the AND element 26, no output signal is output from 27c, 28c of the AND element 27.28. An output signal is emitted from the electromagnetic clutch 8, which is the third intermittent device, and the electromagnetic clutch 8, which is the third intermittent device, is rotated at low speed with the clutch engaged, and the left and right first veneer detectors 18 are arranged at a predetermined interval on the lower side. The veneer is transported to the second veneer detector 17. When the second veneer detector 17 detects the front end of the veneer 1 in the conveyance direction,
The signal of the second single plate detector 17 is output from an AND element 29.30.
29a, , 30a and the AND element 28
．． Output signals are output from 29c and 30c of 30 and OR element 3
1.32, 31b and 32b and output signals are generated from the OR elements 31.32 and 31c and 32c, and the clutch of the electromagnetic clutch 8, which is the third intermittent device, is disengaged and the low speed rotation is stopped. be.

- At the same time as the operation described above, the left and right first single plate detectors 16
The signal is input to 25b of the memory element 25, and an output signal is issued from 25c of the memory element 25, and when the piston of the air cylinder 7b moves forward, the opening/closing body 7a also moves forward, and the suction inside 6 and the suction The pipe connected to the machine 5 is closed to stop suction.

Further, when the front end of either the left or right side of the veneer reaches the first veneer detector 16, for example, if the first veneer detector 16 on the right side in the conveying direction detects it first, the signal of the detector is detected. An input signal is input to 2θa and 27b of the AND element 26, 27, but since there is no input signal to 28b of the AND element 2B, an output signal is output from 28d of the AND element 26 and 27a of the AND element 27. Since the human input signals 27a and 27b of the AND element 27 are satisfied, an output signal is output from 27c of the AND element 27 and input to 31a of the OR element 31,
An output signal is output from 1c, and the electromagnetic clutch 8, which is the third intermittent device detected first, is stopped.

On the other hand, since no detection signal is output from the f:fS1 single-plate detector 16 on the left, there is no input signal at 28b of the AND element 2B, and no output signal is output from 28c of the AND element 2, so the OR element Since there is no input signal to 32a of 32, an output signal is output from 32d of OR element 32, and electromagnetic clutch 8, which is an i3 intermittent device, supports and conveys the veneer while continuing the rotation of the conveying belt. be.

When the veneer 1 arrives at the first veneer detector 16 on the left side and a signal is transmitted from the first veneer detector 18 on the left side, an input signal enters 28b of the AND element 2B, and the input signal is input to the AND element 26. Since no output signal is output from 28d, the AND elements 27 and 28 are not satisfied and the AND element 27
．． Since no output signal is output from 27c, 28c of 28, the OR elements 31.32, 31a, 31b, 3
Since there are no input signals to 2a and 32b, output signals are output from 31d and 32d of the OR elements 31 and 32, and the electromagnetic clutch 8, which is the third intermittent device, continues to rotate.

The electromagnetic clutch 8, which is the third intermittent device that was previously inactive, also rotates, and the front end of the veneer is temporarily adjusted. The temporarily corrected veneer is sent to the second veneer detector 17 located downstream of the ml veneer detector IB at a predetermined interval. njI When reaching the second single plate detector 17, a signal is emitted from the second single plate detector 17, input signals are input to AND elements 29a and 30a, and input signals are input to AND elements 29c and 29.30. , 3
Output signal comes out from 0c and 31b of OR element 31.32
, 32b receives the input signal and the OR element 31.32
Output signals are output from 1c, 3'2c, and electromagnetic clutch 8
The front end of the veneer is then positioned.

Of course, it is sufficient to detect the veneer at either the front end or the rear end in the transport direction.

Further, in addition to the above-mentioned AND element, OR element, and memory element, a shift register, other elements, etc. may be used in combination for control.

As mentioned above, the veneer whose edges have been positioned according to the present invention may be conveyed to the next process as it is by restarting the left and right conveyor belts 2.2a at the same time, or the apparatus shown in this embodiment may be arranged in two stages, upper and lower. By arranging them and inserting, for example, a single veneer top plate and back plate separately for each stage, a highly accurate automatic mechanism can be carried out in an extremely short time.

In addition to the above-mentioned control mechanism consisting of the transport mechanism 11 that rotates at high speed, the transport mechanism 12 that rotates at low speed, and the third intermittent device that rotates or pauses the transport belt in the low speed state, the transport mechanism that rotates at high speed 11 and the conveyor @@12 rotating at low speed are connected using a servo motor, and the output al+10 of the servo motor is connected to a gear, a pulley, etc. fitted to each input shaft 9 of the third intermittent device, and the same as described above is performed. The signal from the single plate detector 4 changes the servo motor from high speed (120 m 101 in) to low speed (1 in).
2m/win) while operating the pressurizing device to pressurize the veneer onto the conveyor belt, and controlling the conveyor belt to decelerate from high speed to low speed to keep the veneer continuously conveyed at low speed. The pressurizing device is turned off in response to a detection signal from either one of the left and right first veneer detectors 1B, and the rotation of the first crawler belt on the side detected first is performed. The conveyance belt on the other first veneer detector side is continuously rotated to temporarily correct the edge inclination in the conveyance direction of the veneer, and when the other first veneer detector detects the above-mentioned The conveyance belt on the side that was detected first is rotated and conveyed at low speed to the F52 veneer detector at a predetermined interval, and the conveyance belt is stopped by the detection signal from the second veneer detector and the single plate is conveyed at a low speed. Even when positioning the edge of the plate, the device is simple and effective.

In addition, the above-mentioned pressurizing device 7 is provided in the intermittent device for bringing the air cylinder into and out of contact with the support conveyor as described in Japanese Patent Application Laid-Open No. 57-87444, and the pressure device 7 as described above is used to control the pressure by the signal from the speed switching detector. An intermittent device such as an air cylinder is brought into contact and separated to change the support conveyor from high speed to low speed, and the veneer is pressurized against the support conveyor, and the veneer in the low speed state is transferred to an intermittent device such as an air cylinder using the signal from the first detector. At the same time, the pressurizing device is stopped and the next second
The end edge of the veneer may be positioned by releasing the intermittent air cylinder or the like RH in response to a signal from the detector to stop the support conveyor.

Another embodiment of the pressurizing device 7 for edge positioning according to the present invention described above will be described in detail, as illustrated in FIG. , 2d are provided with #i number of air cylinders 20 etc. in the conveyance direction that can be raised and lowered, and a bar 21 is installed between the air cylinders 20, and below the bar 21 is a roller 21a that is in contact with the veneer and can rotate freely. are provided, and the air cylinder 20 is lowered based on the detection signal of the veneer detector 4 to press the rollers 21a provided on the bar 21 against the veneer l and change the conveyance belt from a high speed state to a low speed state. The air cylinder 20 is raised by the signal from the first veneer detector 16 to stop the rollers 21a provided on the bar 21 from pressing against the veneer l, and at the same time temporarily correct the veneer. At the same time, the second veneer detector may be used to position the edge of the veneer.

Further, as illustrated in FIG. 3, a nozzle 22 made of a pipe, a hose, etc. with an air hole 22a provided above the conveyance belt 2.2a is provided in the conveyance direction, and a nozzle 22 is provided in the conveyance direction. Then, air is blown from the air hole 22a of the nozzle 22 to pressurize and convey the veneer l, and at the same time decelerates the conveying belt from high speed to low speed. The end edge positioning of the veneer may be performed using the second veneer detector 17 while stopping air blowing from the air holes 22a and making temporary corrections.

Further, although not shown in the drawings, a plurality of air cylinders and the like are provided in the conveying direction and move up and down in the conveying direction above the conveying belt 2.2a, and rotatable rolls are attached to the air cylinders,
A flat belt that can be freely driven by contacting the veneer below the roll;
Open the chain, needle belt, slotted belt, etc., lower the air cylinder to press against the veneer based on the signal from the veneer detector 4, and reduce the speed from high speed to low speed, and the f:fS1 The air cylinder is raised in response to a detection signal from the veneer detector 16 to stop suppressing the veneer, and while temporarily correcting the veneer, the second veneer detector positions the edge of the veneer. Alternatively, the conveying belt may be curved to perform the above-described edge positioning of the veneer.

Therefore, when decelerating from high speed to low speed, the conveyor belt 2.2a and the veneer 1 are forced to
．． 2a is pressurized, so there is no friction and extremely short distance FA
Since the speed is reduced in a short time and the edge positioning of the veneer can be performed, productivity is high and accurate positioning can be performed.

It should be noted that the present invention can of course be used in the devices described in JP-A-56-113652, JP-A-56-133104, and JP-A-56-67444, as well as in plywood factories. The value is enormous.

[Brief explanation of drawings]

The drawings show an example of the implementation of the present invention, FIG. 1 is a perspective explanatory view for explaining the present invention, FIGS. 2 and 3 are side views for explaining other embodiments, and FIG. 4 is a perspective view for explaining the present invention. Circuit explanatory diagram for explaining the electric circuit of the present invention, l, Φ, veneer, 2.2a... conveyance belt, 4... veneer detector, 5... suction machine, 6... Suction box, 7...pressure device, 7aφ...opening/closing body, 11.12...transport mechanism,
1G--First veneer detector, 17...Second veneer detector, 7b, 20--Air cylinder, 21...Bar, 21a/me roller, 22/11Φ nosle, 23...・
Control circuit, 24.25・Φ・Memory element, 26.27.
28.21j, 30... working AND element, 31, 32...
・φOR element

Claims (1)

[Scope of Claims] Conveyance belts are provided at at least two locations on the left and right for conveying the veneer in a direction perpendicular to the fibers, a control mechanism is provided for decelerating the conveyance belt from high speed to low speed, and a control mechanism for decelerating the conveyance belt from high speed to low speed is provided, and a control mechanism for decelerating the conveyance belt from high speed to low speed is provided, and a control mechanism for decelerating the conveyance belt from high speed to low speed is provided, A veneer detector is provided which detects the arrival and sends a signal to decelerate from a high speed to a low speed state and a signal to pressurize the veneer to the conveyance belt, Left and right first veneer detectors are provided in a direction perpendicular to the conveyance belt, which detect the left and right edges and transmit a signal to temporarily correct the edge of the veneer and a signal to stop pressurizing the veneer; A pressurizing device is provided for pressurizing the veneer on the conveying belt between the veneer detector and the first veneer detector, and the veneer is placed at a predetermined interval on the downstream side of the first veneer detector. A second veneer detector is provided to detect the positioning of the veneer 3, and a control mechanism is operated based on a signal from the veneer detector, and the pressurizing device is operated to pressurize the veneer onto the conveying belt. The pressurizing device is stopped at the same time when one of the left and right first veneer detectors detects a veneer that is decelerated from high speed to low speed and is continuously conveyed at a low speed. At the same time, until the other first veneer detector detects the veneer, the control mechanism on the side that detected it first is suspended, the edge of the veneer in the conveying direction is temporarily corrected, and the control mechanism on the other first veneer detector side is temporarily corrected. The mechanism continues to rotate as it is, and when the other first veneer detector detects the detection, the control mechanism on the side that detected it first is activated, and the veneer is transported at a low speed to the second veneer detector at a predetermined interval. death,
A conveyance pressurizing device for positioning the edge of a veneer, comprising a control circuit that controls the positioning of the veneer by stopping each control mechanism of the conveyance belt in response to a detection signal from a second veneer detector.