CN2158164Y

CN2158164Y - Fully automatic printed circuit board cutting machine

Info

Publication number: CN2158164Y
Application number: CN 93206955
Authority: CN
Inventors: 许华山
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-20
Filing date: 1993-03-20
Publication date: 1994-03-02
Anticipated expiration: 2003-03-20

Abstract

A full-automatic PC board pin cutter, it replaces the automatic feeding drive system of the past pneumatics with the automatic feeding drive system of the gas-oil pressure, it includes the air cock device, connects the controller of the air cock device, and connect to the gas-oil pressure of the controller; the controller is respectively connected with the pneumatic-hydraulic pressure and the second cylinder, and the pneumatic-hydraulic pressure is connected with the first cylinder; when air enters the controller from the air nozzle device and is separately controlled, a part of the air enters the air pressure to push and pull the indirect first cylinder, so as to drive the PC board to move forward and backward, and the other part of the air enters the second cylinder to move up and down, so that the pushing and backward movement of the PC board is more stable.

Description

Full-automatic corner cutting machine for printed circuit plate

The utility model relates to a kind of full-automatic printed circuit board (PCB) (Printed circuit board, be called for short the PC plate) cutter, particularly relate to and a kind ofly pressing pushing away, retreat, drive the propelling start of PC plate before the oil hydraulic cylinder, be able to have preferable, action effect more stably by gas and oil.

Full-automatic PC plate cutter in the past, it mainly is configured with the wolfram steel cutter section of nothing height-adjusting system, free-standing adjustable rail system and pneumatics self-feeding drive system (consulting Fig. 1):

The wolfram steel cutter section of nothing height-adjusting system has (Fig. 1), and upper slitter lid 11 locks in wolfram steel cutter 13 on the pedestal 14 by hexagon socket head cap screw 12, and makes wolfram steel cutter 13 smooth fully with upper slitter lid 11, so can cut the pin of PC plate, blocks and be unlikely by upper slitter lid 11; Pedestal 14 is done one with inner sleeve 17 and is combined closely by upper bearing (metal) 15, lower bearing 16, one groove is wherein arranged under pedestal, interior dress O type ring 18, use and withstand lower bearing 16, motor 19 drives pedestal 14 by belt 20 transfer motion powers to the belt pulley 21 of pedestal 14 belows, and then drive wolfram steel cutter 13, and make its smooth and easy motion; And a groove milling 22 arranged on the inner sleeve 17, and it is by locking screw 24 on the outer tube 23, and screw 24 enters in the groove milling 22, and makes inner sleeve 17 only can do upper and lower moving, and outer tube 23 mat screw 31 again locks on the upper plate 28; On inner sleeve 17 outer walls, mill out a groove 24, prop up, do adjustment up and down in groove milling 22 scopes on inner sleeve 17 by the roller on the L sections 25 26; And the screw rod 261 of adjusting the cutter height is connected to female round bar 27 on the L sections 25, and L sections 25 are round bars 30 with the U sections plate 29 on the upper plate 28 is the center rotation, so screw rod 261 of rotatable adjustment cutter height, and make whole L sections 25 do clockwise turn, the groove 24 that roller 26 on the L sections 25 promotes on the inner sleeve 17, and whole tool rest is risen, so just reach the effect of cutter height fine setting.

The independent Adjustment System (seeing also Fig. 2) of left and right sides rail, it is respectively to be provided with track left side pedestal 51 and right pedestal 52 under each track, left adjusting lever 53 is arranged respectively on left pedestal 51, right adjusting lever 54 passes, when button 55 is adjusted on a rotation left side, lower railway left side pedestal 51 is moved and left adjusting lever 53 passes the left pedestal 51 that gets on the right track, drive the right adjusting lever 57 of tack that chain 56 reaches spinning force opposite side, and pass the right pedestal 52 that gets on the right track, right adjusting lever 57 moves the right pedestal 52 of lower railway by the screw thread on the bar, lower railway is moved up and down abreast, in like manner get on the right track and then can move up and down by right adjusting lever 58, no matter thereby have an all accommodable advantage of any grotesque PC plate, again again can be according to what of part pin on the PC plate, and suitably adjust the best configuration tangent with blade, and left and right sides track and utilize supported on both sides bar 5959 ' support (seeing also Fig. 1), supporting seat 591 mat screws are fixed in upper plate 28, and bearing 592 is arranged on the supporting seat 591, in pass by support bar 59, parallel sliding bearing 521 is all arranged on the pedestal 52, in pass by support bar 59 again, so pedestal 52 just can be free on support bar 59 left and right displacement.Track base 61 is stairsteppings, and it also cooperates guide cover 63, and both are with screw 62, and spring 64 and fixing so can be according to the shape of PC plate, and set screw 62, and adjust suitable guide groove; And pneumatics self-feeding drive system, be to utilize air force to fix the PC plate, to avoid the bending of PC plate, and the stable PC plate that promotes, see also Fig. 2, under air force interface 381 is arranged is to connect air compressor machine air pressure is provided, it connects 3 combinations 382 again with correct adjusting air pressure, and then connects electric-air valve 383, electric-air valve provides four air hoses 311,312,363,364, receive cylinder 36 respectively, cylinder 31, and electric-air valve 383 links to the time relay (RELAY) 384 again, with the action of correct each cylinder of control.

As Fig. 3, cylinder 31, by tracheae 311,312, and form an action that pushes away or draw, pull bar 313 bottoms of its cylinder 31 by screw locking on parallel push-and-pull pedestal 32, and parallel push-and-pull pedestal 32 mat screws 321 are fixed in pedestal 33, pedestal 33 connects parallel push-and-pull bar 34 by screw 331, and parallel push-and-pull bar 34 two ends respectively are provided with wheel shaft 341, on slide rail 342 (as Fig. 1, shown in 3), so pedestal 33 can be by the push-and-pull of cylinder 31, and advance reposefully or retreat, it advances to the end has a block 315 to cushion its impulse force, and it is stepped back then has an inching switch 316 to control the stroke that it is stepped back; And erect on the pedestal 33 four guide rod tubes 332 are arranged, in pass by holder 35 top guide bars 351, and cylinder 36 is fixed on the pedestal 33, and the bottom mat screw of cylinder pull bar 361 is connected in the putting film 362 on the holder 35, when so the tracheae on the cylinder 36 363,364 passes in and out gas, drive holder 35, and, move up and down stably to reach one by the guide rod on the holder 35 351; Holder 35 (see also Fig. 4, Fig. 3) bottom lower plate 350 sides are provided with two straight formula elongated holes 352,353, push jack 354 is put into elongated hole 352, passing the elongated hole 353 of push jack and bottom lower plate 350 can fix push jack 354 by screw, and bottom lower plate 350 both sides of holder 35 are provided with horizontal type elongated hole 355, it is used for fixing locking pin 357, by the screw thread of locking pin 357 itself and up and down nut, and can be in elongated hole about 355 fine settings and fine setting up and down, to fix the PC plate indeformable and reach, so when the PC plate being penetrated Kong Gou And on the guide rail 611 and forward impelling, spacer 37 screws in because of entering of PC plate, and allow the PC plate pass through, treat PC plate one mistake, spacer 37 is because the gravity block 372 of its underpart, and make spacer 37 reinstatements upright, the PC plate just can prop up spacer 37 backward, gravity block 372 under the spacer then props up baffle plate 371, so the PC plate is put into location on the track base 61 by this, when starting power supply, at first cylinder 36 just moves, and with holder 35 the propping up wheel 39 of interference fit its underpart and fix the PC plate down, and exhaust hood 31 actions, push the PC plate to cutter by the push pedal on the holder 35 354, so, the every special wolfram steel cutter section of the nothing height-adjusting system (1) of the full-automatic PC plate of this product cutter just can reach the particular function of free-standing adjustable rail system (2) and pneumatics self-feeding drive system (3).

Main purpose of the present utility model is providing a kind of " full-automatic PC plate cutter ", and it is to press the self-feeding drive system to replace pneumatics self-feeding drive system with gas and oil; Promptly stablize firmly PC plate, press promotion oil hydraulic cylinder drive PC plate to advance with gas and oil again, and carry out the cutting of exactly displacement by the gas promotion oil body of gas and oil pressure, reach and stablize certain cutting effect to cutter with fore-set.

Another main purpose of the present utility model is to be to provide a kind of " PC plate cutter automatically ", and it also replaces chain by the structure design of feed track simultaneously, easily blocks and can solve chain, and influence transmits the action that the PC plate advances to cutter.

A main purpose more of the present utility model is to be to provide a kind of " automatically PC plate cutter ", and it can withstand the PC plate that is sent to the cutter place by the overhead device, does so that the scraper tool is cut foot-propelled effectively, reaches to prevent that the PC plate from cutting the foot fault difference and taking place.

Another main purpose of the present utility model is to be to provide a kind of " PC plate cutter automatically ", and it can be located the PC plate that is positioned on the feed track by positioner simultaneously and suitably be transmitted, and does not have the generation of displacement, reaches the requirement of carrying locating effect.

For reaching above-mentioned purpose, the automatic PC plate of the utility model cutter is characterized in that, gas and oil presses the self-feeding drive system to include air valve device, and it can import gas, connects the controller of air valve device; And the gas and oil that is connected in controller is pressed; Controller is connected to first gas and oil pressure and second gas and oil is pressed, and two Qi You Ya And are connected in cylinder; When being entered via controller by air valve device, gas divided control, it enters gas and oil respectively and presses, by entering the gas of gas and oil in pressing oil hydraulic cylinder is produced in proper order, preferablely advances, retreats pressure again stably, can produce push pull maneuver to first cylinder, and then drive stroke action Qi Ti And that the PC plate advances, retreats and enter second cylinder and form knee-action, it can fix indeformable, the displacement of PC plate, cuts pin work to push effectively to the cutter place really.

According to above principal character, wherein except above-mentioned improvement part, wherein, also the structure by feed track designs replacement chain in the past; The independent Adjustment System that is left and right sides rail is on each track left side pedestal under each track and right pedestal feed track to be set, and can be fit to successfully carry any grotesque PC plate by feed track; In addition, in cutter week the side appropriate location be provided with the overhead device, and the PC plate that is sent to the cutter place can be withstood so that the scraper tool cuts foot-propelled effectively and do, reach and prevent that the PC plate from cutting the foot fault difference and taking place; Origin or beginning place in left and right sides pedestal is provided with positioner, and can locate the PC plate that is positioned on the feed track, suitably is transmitted in order to it, and unlikely being subjected to displacement reaches the conveying locating effect.Other structures of the utility model are all to similar in the past, so, by the combination of above-mentioned structure, just can make the PC plate cut the pushing away of pin, deactuate and do goodly, more accurate effect stably on the actual act is provided.

Below by most preferred embodiment and accompanying drawing full-automatic PC plate cutter of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is the automatic cutaway view of the wolfram steel cutter section of the nothing height-adjusting system of PC plate cutter in the past.

Fig. 2 is the automatic independent Adjustment System cutaway view of the left and right sides rail of PC plate cutter in the past.

Fig. 3 is the automatic cutaway view of first and second cylinder of PC plate cutter in the past.

Fig. 4 is the automatic top view of the lower plate of PC plate cutter in the past.

Fig. 5, the 6th, the gas and oil of the full-automatic PC plate of the utility model cutter is pressed the first embodiment schematic diagram of self-feeding drive system.

Fig. 7 is the top view (feed track and overhead device on the pedestal of the left and right sides are shown) of independent Adjustment System of the left and right sides rail of the full-automatic PC plate of the utility model cutter.

Fig. 8 is the positioner on the pedestal of the left and right sides in the top view of independent Adjustment System of left and right sides rail of the full-automatic PC plate of the utility model cutter.

Fig. 9 is that the gas and oil of the full-automatic PC plate of the utility model cutter presses second of self-feeding drive system to implement illustration (gas and oil is pressed the enforcement that is connected with cylinder).

See also shown in Fig. 1,5, the utility model includes: the wolfram steel cutter section of nothing height-adjusting system, free-standing adjustable rail system and gas and oil are pressed the self-feeding drive system.

The wolfram steel cutter section of nothing height-adjusting system, it has upper slitter lid 11, and it locks in wolfram steel cutter 13 on the pedestal 14 by hexagon socket head cap screw 12, and is complete smooth shape with upper slitter lid 11.Pedestal 14 is done combine closely And and a pedestal 14 by upper bearing (metal) 15, lower bearing 16 and inner sleeve 17 and is had the groove of dress O type ring 18 in, to withstand lower bearing 16, motor 19 drives pedestal 14 by belt 20 transfer motion powers to the belt pulley 21 of pedestal 14 belows, and then drive wolfram steel cutter 13, and make its smooth and easy motion.And the outside wall surface that an inner sleeve 17 contacts with outer tube 23 is provided with a groove milling 22, and it is by locking screw 24 on the outer tube 23, and screw 24 enters in the groove milling 22, and makes inner sleeve 17 only can do upper and lower moving, and outer tube 23 mat screw 31 again locks on the upper plate 28.Mill out a groove 294 on inner sleeve 17 outer walls, it props up by the roller on the L sections 25 26, makes inner sleeve 17 do adjustment up and down in groove milling 22 scopes.And in order to adjust the screw rod 261 of cutter height, it is connected to female round bar 27 on the L sections 25, and L sections 25 are round bars 30 with the U sections plate 29 on the upper plate 28 is the center rotation, so screw rod 261 of rotatable adjustment cutter height, and make whole L sections 25 do clockwise turn, the groove 294 that roller 26 on the L sections 25 promotes on the inner sleeve 17, and whole tool rest is risen, so can reach the effect of cutter height fine setting.

And can adjust the independent Adjustment System of left and right sides rail, as shown in Figure 2, be on a left side, track left side pedestal 51 and right pedestal 52 are set under the right track, on left pedestal 51, be respectively equipped with left adjusting

lever

53,54, when button 55 is adjusted on a rotation left side, lower railway left side pedestal 51 is moved, in like manner can get, the right pedestal 52 of lower railway is moved, lower railway is moved up and down abreast, in like manner get on the right track and to move up and down through adjusting lever 58, thereby can be fit to any grotesque PC plate, again can be according to what of part pin on the PC plate, and suitably adjust and the tangent best configuration of blade.In addition, left and right sides track is to utilize supported on both sides bar 59,59 ' support, supporting seat 591 is fixed in upper plate 28 by screw, and supporting seat 591 is provided with bearing 592, pass by support bar 59 in it, pedestal 52 is provided with parallel sliding bearing 521, is also passed by support bar 59 in it, and so pedestal 52 just can freedom left and right displacement on support bar 59.Track base 61 is that a stairstepping, its And cooperate guide cover 63, and both fix with screw 62, spring 64, so, just can adjust suitable guide groove according to the shape adjustment screw 62 of PC plate.

The utility model is the essential structure based in the past, it is characterized in that:

Above-mentioned gas and oil is pressed the self-feeding drive system, it is to utilize air force to come the push-and-pull liquid to form a kind of power pressure, stably to promote the PC plate, see also Fig. 5, shown in 6, one air valve device 38 is arranged, its air force interface 381 is to be connected with air compressor machine so that the air pressure input to be provided, it connects a controller 382 again, defeated Qi Nei And of is provided with electric-air valve 383 with the confession of correct adjusting air pressure, electric-air valve provides and has controlled four air hoses 311,312,363,364, it is connected respectively to gas and oil and presses 385, first cylinder 31, second cylinder 36, and electric-air valve 383 links to the time relay (RELAY) 384 again, with the operate time of correct each cylinder of control; And gas and oil presses 385 And to be provided with body 386, body 386 is connected to first cylinder 31, make first cylinder 31 be controlled by gas and oil by body 386 and press 385, and form an action that pushes away or draw, pull bar 313 bottoms of its first cylinder 31 are by screw, pinning is on parallel push-and-pull pedestal 32, and parallel push-and-pull pedestal 32 is fixed in pedestal 33 by screw 321, pedestal 33 connects parallel push-and-pull bar 34 by screw 331, and parallel push-and-pull bar 34 two ends respectively be provided with wheel shaft 341 on slide rail 342 (as Fig. 1, shown in 3), so pedestal 33 can advance by the push-and-pull of cylinder 31 or retreat stably.It advances to the end has a block 315 to cushion its impulse force, and it is stepped back then has an inching switch 316 to control the stroke that it is stepped back.

33 perpendicular have four guide rod tubes 332 on the pedestal, pass by the guide rod on the holder 35 351 in it, and second cylinder 36 is fixed on the pedestal 33, and the bottom of cylinder pull bar 361 is connected in putting film 362 on the holder 35 by screw, when so the tracheae on the cylinder 36 363,364 passes in and out gas, drive holder 35, and by the guide rod on the holder 35 351 to reach a knee-action stably.The lower plate 350 of holder 35 upper bottom portion, its side is provided with two straight formula elongated holes 352,353, push jack 354 is put into elongated hole 352, pass push jack by screw, the bottom lower plate 350 elongated hole 353 and push jack 354 is fixed, and holder 35 upper bottom portion lower plates 350 both sides are provided with horizontal type elongated hole 355, be fixed with locking pin 357 on it, by the screw thread of locking pin 357 itself and up and down nut, and can fix the unlikely deformation displacement of PC plate and reach in elongated hole about 355 fine settings and fine setting up and down.

Inboard corresponding edge is provided with feed track on the track of the independent Adjustment System of above-mentioned left and right sides rail left side pedestal 51 and the right pedestal 52, as shown in Figure 8, the feed track of right pedestal 52 is 521, the feed track of left side pedestal 51 is not shown on the figure, the two corresponding lateral margins of the PC plate of can planting by two feed tracks, successfully allow to be fit to carry in the PC plate of any size shape advantage of sliding along feed track; Be provided with overhead device 70 apart from wolfram steel cutter 13 all side appropriate locations, it has a holder 71 that is installed with, be connected with the spinning roller 72 that to locate rotation on the holder 71, it can be withstood the PC plate that is sent to wolfram steel cutter 13 places by the bottom, with 13 pairs of PC plates of convenient wolfram steel cutter cut foot-propelled as the time have a support function, prevent that plate face bending from taking place, reach and avoid the PC plate to cut pin having error to produce and influence quality; As shown in Figure 8, initiating terminal appropriate location in left and

right sides pedestal

51 or 52 is provided with positioner 73, it is provided with a pedestal 731 that is installed with, be pivoted with adjustable point on it and be the moving location-plate 732 of unidirectional pivot, when the PC plate entered two feed tracks before the 13 places slippage of wolfram steel cutter, the PC plate can cross earlier location-plate 732 then plate tail Bei Ding Wei And and transmitted by continuous rightly, do not have any displacement and take place, reach the conveying locating effect.Other structures of this case are all similar to above-mentioned automatic PC plate cutter in the past.

Combination by above-mentioned structure, when gas is entered by air valve device 38 and controlled by branch via controller 382, its part enters gas and oil and presses 385, generation before pushes away (or retreating) pressure in proper order again stably to the below oil hydraulic cylinder by entering the interior gas of gas and oil pressure, push away (drawing) action under can producing first cylinder 31, to drive the stroke action that the PC plate advances (retreating); Another part is to enter second cylinder 36 to form knee-action, so when Bei Ju Xian And pushes away forward in the hole ditch that the PC plate is penetrated on two feed tracks, because of entering of PC plate is positioned by location-plate 732 earlier, promptly treat PC plate one mistake, location-plate 732 is owing to the unidirectional pivot that is of its underpart gravity block moves, and make location-plate 732 reinstatements upright, the PC plate plate tail plate 732 that just can be positioned props up, so the PC plate is positioned on described two feed tracks by this, when starting power supply, at first second cylinder 36 just moves, and with holder 35 the propping up wheel 39 of interference fit its underpart and fix the PC plate down, then cooperate the action of aforesaid first cylinder 31,, and the PC plate can be pushed to the tungsten carbide tipped tool place by the push pedal on the holder 35 354.It is continuous when the PC plate is transferred to wolfram steel cutter 13 places, PC plate bottom can be withstood rightly by spinning roller 72, with 13 pairs of PC plates of convenient wolfram steel cutter cut foot-propelled as the time have a support function, prevent that the bending of plate face from taking place, avoiding the PC plate to cut pin has the error generation and influences quality, cut pin work to reach to push effectively really to wolfram steel cutter 13 places, cut the pushing away of pin for its instinct makes PC, deactuate is done better, provide more accurate effect stably on the actual act, to improve the sense of worth of automatic PC plate cutter integral body.

At last, see also shown in Figure 9ly, it is that the gas and oil of the full-automatic PC plate of the utility model cutter presses in the self-feeding drive system gas and oil to press with second of cylinder to implement illustration; Air hose 311,312 be connected to first gas and oil press 385, second gas and oil press 385 ', and first gas and oil presses 385, second gas and oil to press 385 ′ And respectively to be provided with body 386,386 ' be connected to first cylinder 31, so that first cylinder 31 by body 386,386 ' and be controlled by first and second gas and oil and press 385,385 ', and produce the action that pushes away stably or draw is arranged.

When gas is entered by air valve device 38 and controlled by branch via controller 382, when entering first gas and oil through tracheae 311, gas presses 385, by gas in going into the below oil hydraulic cylinder is produced preceding stably again in proper order pushing force, promote to do before can producing one to first cylinder 31, so that drive the stroke action that the PC plate advances, opposite, when entering second gas and oil through tracheae 312, gas presses 385 ' interior (being to stop gas entering in the tracheae 311 at this moment), generation promotes pressure stably and can produce pusher action to first cylinder 31 to the below oil hydraulic cylinder, promptly drive the action of PC plate backward travel; So by two gas and oils press 385,385 ' cooperatively interact and control the forward and backward stroke action of PC plate, more can obtain in proper order, the preferable effect that before pushes away stably again, retreats.

In sum, the full-automatic PC plate of the utility model cutter, it can produce more steady, better practical function really.

Claims

1, a kind of full-automatic PC board cutting machine, it comprises:

Tungsten steel knife stepless height adjustment system: it includes base, upper plate, tungsten steel knife, screw, L-shaped iron, roller, inner sleeve, outer sleeve; tungsten steel knife is set on the base, and the outer sleeve is locked on the On the upper plate, the inner casing is set in the outer casing and is combined with the base through the upper and lower bearings. The outer wall surface of the inner casing and the outer casing is provided with a milling groove, and a screw is passed through the inner casing. The milling groove is locked on the outer sleeve, the inner sleeve is provided with a groove, the screw is set at one end of the L-shaped iron, the roller is set at the other end of the L-shaped iron and is in the groove, and the L-shaped iron is pivotally connected to the The upper plate rotates with its pivot point as the center; the lower part of the base is connected with a pulley, and the pulley drives the base to run through the motor;

Independent adjustable track system: it includes left and right tracks, left and right bases are set on the left and right tracks, adjustment rods are set on the left and right bases, each adjustment rod is connected to each other by driving the chain, Threads are provided on the adjusting rod, trapezoidal guide rail seats and guide seat covers are provided on the left and right bases, and they are fixed to each other by screws and springs;

It is characterized in that: the fully automatic PC board cutting machine also includes an automatic feeding transmission system with air and oil pressure;

It is equipped with a first cylinder, a second cylinder, an air nozzle device, a controller connected to the air nozzle device, and an air-oil pressure connected to the controller; the controller is connected to the second cylinder, and the air-oil pressure is connected to the first cylinder; The gas enters the controller through the air nozzle device and pushes the hydraulic cylinder in the air-oil pressure to move the first cylinder. At the same time, the gas also enters the second cylinder through the air nozzle device and pushes the second cylinder to move up and down.

2. The full-automatic PC board cutting machine according to claim 1, characterized in that: the air-oil pressure includes the first air-oil pressure and the second air-oil pressure, an electric air valve is provided in the controller, and the electric air There are four air pipes for valve control, two of which are connected to the first air oil pressure and the second air oil pressure, and the other two are connected to the second cylinder. The first and second air oil pressures are respectively provided with pipes connected to the first cylinder body, the first and second air oil pressures control the action of the first cylinder through the pipe body.

3. The fully automatic PC board cutting machine according to claim 1, characterized in that: the controller is equipped with an electric air valve, and the electric air valve controls four air pipes, two of which are connected to the air oil pressure, the second One air cylinder, the other two are connected to the second air cylinder, the air and oil pressure is provided with a pipe body, the pipe body is connected to the first air cylinder, and the air and oil pressure controls the action of the first air cylinder through the pipe body.

4. The fully automatic PC board cutting machine according to claim 1, characterized in that: each track of the independent adjustable track system is provided with a conveying track.

5. The fully automatic PC board cutting machine according to claim 1, characterized in that: the side edge of the cutter is provided with a top device, and the top device withstands the PC board conveyed to the cutter.

6. The fully automatic PC board cutting machine according to claim 4, characterized in that: each track start of the independent adjustable track system is provided with a positioning device, and the positioning device positions the PC board on the conveying path.