DE2358709A1 - DRIVE CONTROL FOR A FASTENING ELEMENT FEEDING DEVICE - Google Patents

Description

MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.,
1006, Oaza Kadoma, Radoma-shi, Osaka , Japan.

Drive control for a fastener feeding device -

The invention is concerned with a drive control, in particular with a pneumatic drive control for automatic, continuous feeding of individual Fastening elements, such as screws or rivets, to a fastening device.

Fastening with the help of screws, rivets or similar fasteners comes in handy in all
Branches of industry. In order to facilitate and expedite such fastening, it is known to use an automatic feeding device for individual fastening elements to a powered screwdriver or a similar fastening device. These automatic feed devices require a control of their drive which works precisely and reliably and ensures that the fastening elements are fed to a fastening device as required.

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i.e., once the fastener is a fastener has inserted into an object, another fastener of the device quickly becomes supplied and kept ready for the next fastening process. Conventional drive controls work electrically and pneumatically, thus enabling the automatic feeder to be controlled. This combined use of two different energy sources has the obvious disadvantage of one relatively complicated drive control, which is complex, expensive and unsatisfactory because it is of There are two sources of interference from the outset.

The invention has therefore set itself the task of 'creating a drive control that can only be operated with a pneumatic, matic energy source gets by, with fasteners in the form of screws or rivets continuously are fed from a storage container to a delivery station and from the delivery or distribution station be fed to a fastening device as required.

The invention is also intended to provide a drive control, wherein a removal device, for example in the form of a rotating drum, for removing fastening elements from a storage container, for example in the form of a funnel, is only actuated if the removal is to be maintained a constant supply of fastening elements is required for the fastening device, thereby increasing the efficiency of an automatic feeder and lowering the running cost.

The invention is also intended to provide a drive control which has one or more low pressure sensors, with the help of which the size of the supply of fastening elements

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ORIGINAL INSPECTED

th or the like can be determined on a feed path

The invention is also intended to provide a drive control which can be used directly and without modification for controlling automatic feeders for fasteners of various types Sizes can be used, so that a purchase of various automatic feeding devices for feeding of objects of different sizes is not necessary.

The above "purposes are in accordance with the invention achieved with a drive control having a first and a second pneumatic circuit, wherein air is fed to both circuits from a single source and the first circuit for controlling a rotating drum is provided, the fastening elements from a storage container removes and puts it on a feed chute, which leads to a distribution station, and the second Control circuit for the individual distribution of the fastening elements is provided for a fastening device. The first circle includes a feeler that measures the amount of Fasteners that are present on the slide leading to the distribution station, and a signal to actuate the drum releases if less than one predetermined number of fastening elements the slide are located, so that new fasteners be yielded to the slide, and the rest turns off the drum with the help of a signal. The second circle has a feeler that detects. if the fastening device the supply of a fastening element requires and then emits a signal that • the distribution station for the transfer of a fastening element

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Mentes caused to the fastening device and the rest of the switch off the distribution station.

Details of the invention emerge from the following Description in connection with the accompanying figures emerges in which several preferred embodiments of the invention and like reference numerals denote like parts. Show in detail:

Fig. 1 is a schematic perspective view of a Feeding device for fastening elements, which is provided with a drive control according to the invention is controllable;

FIG. 2 shows a representation similar to FIG. 1, but from a different viewing angle; FIG.

Fig. 3 (a) is a side view of the in Fig. 3 (b), provided device detail;

3 (b) is a front view of a rotary drum with the joint between the drum and an air cylinder;

FIG. 3 (c) shows, on an enlarged scale, the ratchet part of the joint according to FIG (away);

4 shows an enlarged, oblique representation of a sensor and signal transmitter for detection the presence of fasteners on a slide;

Fig. 5 (a), (b) a vertical cross section through the sensor and signal transmitter from Fig. 4;

6 is a perspective and partially sectioned partial view of the fastening element distribution station;

7 shows a perspective illustration of a driven fastening device;

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8 shows an exploded view of the signal transmitter associated with the fastening device from Pig.7;

9, 10 cross-sectional representations for explanation the operation of the mounting device auto switch ;

11 shows a circuit diagram for the course of the individual air flows in the drive control according to one embodiment of the invention;

Figure 12 is a perspective view of a fastener feeding device according to a second embodiment of the invention;

13 shows an illustration of the device from FIG. from a different point of view;

14 is a perspective and partially sectioned view of the distribution station;

15 shows a schematic cross section through the Distribution station according to FIG. 14;

16 shows a perspective illustration of a driven Fastening tool;

17 shows a cross section through one of the fastening devices according to FIG. 16 associated signal transmitter; and

Fig. 18 is a circuit diagram for the course of the Air flows in the drive control according to a second embodiment of the invention «

Figs. 1 and 2 show a feeding device whose automatic control from the drive control according to the invention can be procured «The feed device has on the whole a cup-shaped funnel 2 open at the top on, in which fasteners 38, for example in the form of screws, rivets or the like. can be stored loosely. The funnel 2 is in a raised position by essentially vertical feet la, Ib of a frame 1

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held firmly with the feet at the front and rear Section of the funnel 2 are attached. The frame 1 also has a traverse Ic, which extends from the leg la extends to the leg Ib and is itself attached to a base plate 2 3, the choice according to the respective Requirements with screw holes or other fastening devices for fixing on the floor or another Storage area can be provided. A rotary drum 3 is partially provided inside the hopper 2, and forms one side of it. The drum 3 is mounted so that it can rotate vertically that the axis of rotation is essentially is horizontal and the top of the funnel

2 approximately level with the center line of the drum

3 lies. The drum 3 is rotatably mounted on a pin 7 a, which extends from the upper end of a vertically aligned bearing frame 5. The lower section of the drum support frame 5 lies below the bottom of the drum 3 and is fixedly attached to the upper section of a vertically aligned bearing plate 15. The plate 15 is firmly seated on the frame 1. The drive for the drum 3 comes from an air cylinder 6 which, via a piston rod 12, a block 11 articulated arms. 9a, 9b, 10a, 10b, ratchets 8 and a gear 7 on the drum works. The air cylinder β is operated by a slide unit 13 which is fixed to the frame 1 and which will be described later. The gear 7 is mounted on the shaft 7 a coaxially with the drum 3 _f so that a rotation of the gear 7 is accompanied by a corresponding rotation of the drum 3. The block 11, the piston rod 12 and the cylinder 6 are generally vertically below the gear 7. The air cylinder 6 rests on the base plate 23 while its upper end is supported by a bearing 14 which extends from the bearing plate 15 and on attached to her or also a

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lnfcegraler ingredient may be from her "The control of the air supply to d®r slider unit 13 and the air cylinder 6, and drive control is done by a control box 22 which is fixed to the frame. 1

As can be seen from Fig. 3, the block 11 is firmly attached to the upper end of the piston rod 12 and moves the block 11 fixedly attached to it up and down. The Gelenkarsne 9a, 9b have a slightly larger length than the radius of the gear wheel 7 and is at one end of the shaft 7a rotatably mounted the articulated arms 10a, 10b have a slightly smaller length of stand out as the radius of the drum 3 ₅ and the lower ends with the Block 11 in a rotatable connection via a pin 25. The upper ends of the articulated arms 10a, 10b are via pins 24a, 24b connected to the outer ends of the respective articulated arms 9a _s 9b rotatably »The above-mentioned ratchet 8a, 8b also sit rotatably on the pins 24a, 24b so that pawls ratchets or 8a, 8b can rest on the periphery of the gear wheel 7 "Each pawl 8a, 8b rests under the action of a compression spring 27 on the periphery of the gear wheel 7, with opposite ends of the spring being fixed on pins 26, which extend from the end faces of the The pawl 8a and the articulated arm 9a or "the pawl 8b and the articulated arm 9b extend". The pawls 8a and 8b are both inclined in the same direction towards the gear 7, but lie on opposite sides of the gear "During the re

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ziproken movement of the piston of the air cylinder therefore, when the piston rod 12 and the block 11 move upwards, the pawl 8a, the gear wheel 7 and the gear 7 and the drum rotate, while the pawl 8b on the periphery of the gear 7 simply rode. If, on the other hand, the piston rod 12 and the block 11 move downwards, the gear is gripped and rotated by the pawl 8b, by the pawl 8a but not taken. In both forms of movement, either by the pawl 8a or by the Pawl 8a the gear 7 and thus the drum 3 rotated in the same direction, so that the reciprocal form of motion of the air cylinder 6 causes the drum 3 to rotate uniformly.

It will be seen from Fig. 1 that the drum 3 is rotated upwards towards the rear end of the hopper 2 and continues to rotate downwards at the front end of the hopper. On the inner periphery of the drum 3, a plurality of spoons 4 are provided, which are shaped and inclined towards the periphery of the drum 3 so that they take fastening elements 38 loosely in the hopper 2 with them and the fastening elements 38 up to the highest point of rotation of the Take drum 3 with you. At this point, during the further downward movement of the spoons, the fastening elements 38 carried along by them are released from the spoons into a guide chute 17 inclined downward. The guide chute 17 is located approximately vertically above the center of the funnel 2 and leads the from the spoons 4 _; coming fasteners 38 in a downwardly inclined chute 16. The chute 16 consists of two parallel rails 16a, 16b and extends from the chute 17 through the front of the hopper 2 to a distribution station 18, which is below the level of the hopper and in front of it is arranged. The rails

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16a, 16b have such a distance that the head of a Fastening element 38 comes to rest on the upper edges of the rails, as is most clearly shown in Fig. (5a) £ own. This allows the fasteners 38 on the chute 16 in the correct orientation to the distribution station 18 slide down. Above the chute 16 and just before the exit point from the funnel 2 is a rotatable deflector wheel 19 is provided. .The fasteners 38 that come from the chute 17 and are not in the correct orientation will be driven by the deflector wheel 19 and conveyed back into the funnel 2 by this. The fasteners 38 shown in are in the correct alignment, run under the deflector wheel 19. Those parts of the rails 16a, 16b, the outside and in front of the funnel 2 are on suitably inclined bearing arms 21a, 21b held, which extend from the frame 1 and an integral Are part of the frame. The arms 21a, 21b also provide a bearing or at least the attachment points for a sensor device which has a fan 20 and signal transmitters 28,29, as in particular Fig. 4 clearly shows.

It can now be seen in FIGS. 4 and 5 that the fan 20 comprises a rail 20a which extends above and in the is arranged substantially parallel to a lower part of the chute 16 and into which a channel 30 for passage is formed by air. From an air compressor .AC incoming air is supplied to the duct 30 via a pipe 31 which is located outside the rail 20a and attached to them. The air leaves the channel 30 through the nozzles 32a, 32b. As can best be seen from Fig. 5 recognizes, the nozzles 32a, 32b are located directly above the slide 16 and are so inclined that they come out of them

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ORIGINAL INSPECTED

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Air directed downward between the rails 16a, 16b will. The nozzle 32a lies above a higher point of the chute 16 than the nozzle 32b. FIGS. 4 also show and 5 that signal transmitters 28,29 directly below the nozzles 32a, 32b are arranged. The signal generators 28, 29 are of the same construction, so that a description is sufficient of the signal transmitter 28, it being assumed that this description applies in the same way to the signal transmitter 29 fits.

The signal transmitter 28 forms an essentially yoke-like element with two block sections 28a, 28b which are connected via a connecting section 28c in such a way that a gap 33a remains. Air ducts 34a, 35a are formed in the block sections 28a, 28b. The air channels 34a, 35a comprise essentially horizontal sections which communicate with the gap 33a, as well as sections which reach down to the underside of the block section 34a, 35a. The horizontal sections of the air ducts 34a, 35a are aligned with one another, so that air can be directed from the duct 34a into the air duct 35a in a manner to be described in detail below. Connecting pieces 36a, 36b are firmly attached to the downwardly extending portions of the air ducts 34a, 35a. Air lines 36a ', 3Va * are firmly attached to the connecting pieces 36f, 37a. The signal transmitter 29 similarly has block sections 29a, 29b as well as a connecting bridge section 29c and an intermediate gap 33b, so that a whole yoke-like element results, the air ducts 34b, 35b, the connecting pieces 36b, 37b and the air lines 36b ', 37b ^{1 should} be mentioned. The air lines 36a ', 36' lead to a main supply

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ORIQfNAL INSPECTED

line from the compressed air source AC. The air lines 37a ¹ , 37b ¹ lead to the control input openings 78A, 78B of a NOR element 78, which is described in detail further below .

With particular reference to Figure 5 it can be seen that. the air coming from the document source AC runs through the air ducts 34a, 34b, the gap 33a. or 33b and penetrates into the corresponding air duct 35a or 35b and thus forms an interruptible jet which can be interrupted by that air which is directed from the nozzles 32a or 32b down between the rails of the chute 16. In Fig. 5 (b) it is assumed that there are no fastening elements 38 on the chute, so that the air jets of both signal generators 28,29 is interrupted by air from the nozzles 32a, 32b and therefore none of the signal generators 28,29 emits an output signal . If the number of fasteners 38 on the chute 16 is so large that the chute 16 is filled, from the bottom of the chute 16 to the location of the lower signal generator 29, then prevents the presence of a fastener 38 between the nozzle 33b and the Schütte 16. that air from the nozzle 32b interrupts the beam crossing the gap 33b of the signal generator, as shown in FIG. 5 (a). The signal generator 29 accordingly generates an output signal along the line 37b * for the NOR element 78.

One now takes from Fig. ' 6 that the lower end of the chute 16 is fastened via connecting pieces 40 to a plate 41a of the distribution station 18 already mentioned above. The distribution station 18 has a main housing 41,

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a fixed block 48 attached to the rear wall 41a of the housing 41 is attached, and a sliding block 44, which is between the fixed block 48 and the main housing

41 is displaceable. In the main housing 41, a cylinder 42 is formed which is substantially rectangular to the longitudinal axis of the slide 16 is located. The cylinder covers 46, 47 are provided on the exterior of the main housing 41, at opposite ends of the cylinder 42. A spring-loaded piston rod 43 can be in the cylinder

42 move. A spring 42a is in the cylinder 42 and mounted on the piston 43 and normally pushes the piston 43 to a position in which one end 43a of the piston rod protrudes from the outer side of the cylinder cover 46 so that the end 43a is inside of the main body 41 is. In the fixed block 48, somewhat remote from the connection of the block 48 to the chute 16, there is a guide channel 39 for the fastening elements which extends downward and opens at one end into a connecting piece 49. That the other end of the connector 49 is connected to a manifold 50. The manifold 50 leads to an input tube portion 57 of a powered attachment device 51 described below. One end of the sliding block 44 is fixed to the outer end 43a of the piston via a connecting plate 45

43 connected, so that a movement of the piston 43 in the cylinder 42, the sliding plate 44 to a lateral Displacement with respect to the lower end of the chute 16 caused. In the sliding plate 44 is a cutout 44a is provided, the dimensions of which are adapted to those of a fastening element 38. When the piston end 43a is normally advanced outwardly with respect to the main housing 41, the slide block is 44 due to its connection to the connecting plate 45 led into a position in which the

409824/0746

INSPECTED

Cutout 43a exactly opposite the lower end of the slide 16 is so that a lowermost fastening element = 38 leave the slide 16 and into the cutout 44a can occur. -

The main housing 41 also has an inlet which can be connected to a main air supply from the compressed air source Ac via a normally closed switching valve B2. The switching valve B2 is opened by inlet air which comes from an outlet port 81 Fl of a bistable element 81, which will be described below. When the switching valve B2 opens in this way, the flow of air from the main supply operates the piston 43 so that the piston 43 is moved inwardly with respect to the main housing 41; at the same time, part of this air flow is fed to the guide channel 39 for the fastening element. When the piston 43 is moved inward in this way, the sliding block 44 is guided into a position in which the cutout 4a is aligned with the guide channel 39 , whereby a fastening element 38 which had left the chute 16 and entered the cutout 44a , is conveyed into the guide channel 39, is fed through the connecting piece 49 and then through the manifold 50 and the feed pipe section 57 of the fastening device 51. When the valve B2 closes, the air supply for the distribution station 18 is interrupted, the piston 43 and the sliding block return due to the spring 42a to the starting position in which a cutout is aligned with the lower end of the slide 16 and receive a next fastening element 38 can (see Fig. 6).

Fig. 7 shows that the fastening device 51 a

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ORlQtHALlNSPECTED

235G709

Main unit 54 and a slidable shaft 55, which is slidable in the main unit -54 and is normally held in a forwardly extended position by virtue of a spring 56 will. The above-mentioned feed pipe section 51 guides fastening elements 38 individually one behind the other at the front end of the fastening device 51, which has an outlet hole 58. A handle 59 is attached to the fastener 51 and is intended make dealing with her easier. The fastening device 51 is further equipped with conventional triggering devices equipped for the driver 83, which extends along the longitudinal axis of the fastening device 51 to the The vicinity of the outlet hole 58 extends and the fasteners in objects provided therefor screwed in or otherwise fixed to this. The fastening device 51 is in a known manner actuated, and after actuation the sliding shaft is

55 into the main unit. 54 against the influence of the spring

56 postponed. A signal transmitter 52 with a cover 77

is via screws 53a, 53b on one side of the main unit 54 attached. A stop 62 is attached to the rear end of the slide shaft 55. The stop 62 actuates a hook element 70 which controls the movement of a swivel arm 68 in the signal transmitter 52 (see FIG. 9)

It can now be seen from FIGS. 8, 9, 10 that the signal transmitter has a section with a cylinder 63. An air inlet 60 and an air outlet 61 are at one end 63a of the cylinder 63 is provided. The inlet 60 and the outlet 61 are aligned with one another and are respectively connected to the control opening 79A of a monostable element 79 and to a line P4 leading to the main supply line for air from the air compressor AC leads. A bobbin 64 is provided in the cylinder 63.

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schieblieh houses. One end of the sink body 64 forms an extension 66, which consists of the cylinder 63 extends beyond its outer end 63b. In the vicinity of the other end of the bobbin 64 is in An air duct 67 is formed inside the cylinder 63 and extends radially with respect to the bobbin 64 and extends completely through it. Of the Coil body 64 is preloaded by a spring 65, which exerts a constant force on the. Coil body 64 against the end 63b of the cylinder 63 exerts and the bobbin pushes into a position in which the air duct

67 with. the air inlet 60 and air outlet 61 not in Is in communication so that air from inlet 60 does not can reach the outlet 61, as shown in detail in Fig. 9 Cb).

The coil body extension 66 is contacted by the pivot arm 68 mentioned above. The swing arm 68 is substantially rectangular in shape and is rotatably mounted about a pin 69 which extends through a substantially central point in the block 68 extends. One end of a compression spring 72 is fixed to a pin 73a attached, which is fixed at a point 68a of the pivot arm

68 is attached, which corresponds approximately to the bisection point. The other end of the spring 72 is fixed with a pin 73b connected, which is firmly attached to a fixed portion 74 of the Signal generator 51 .sits. The spring 72 'pushes at a constant rate Force the pivot arm 68 so around the pin 69 that the other Half 68b '"of the swivel arm against the coil body extension 66 presses, as shown in Fig. 10 (a). Under these Under certain circumstances, the bobbin 64 becomes an inward movement favorable with regard to the cylinder. 6 3 caused, against the force of the spring 65, in a position in which the air duct 67 to the air inlet 60 and the air outlet aligned so that air from inlet 60 into the outlet

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. , INSPEOTEp

let 61 flow as is also shown in Fig. 10 (b).

However, the orientation of the pivot arm 68 is not depends on the force exerted by the spring 72, but is also dependent on the position of the above-mentioned hook element 70 determined. The hook member 70 is slidably supported on a plate 76 and faces pawls bent ends 70a, 70b and a main section 70c, with a reinforced section 70d should be emphasized. The main section 70c is essentially parallel to the longitudinal axis of the fastening device 51. The thickened block section 70d is firmly connected to the main section 70c or forms one integral part of the same and extends against the outer edge of the half 68a of the pivot arm 68. The hook ends 70a, 70b are approximately at right angles from the main section 70c and are on the fastening device 51, with the hook end 70a near the front end of the fastener and the hook end 70b are arranged closer to the rear end of the fastening device 51 (see Fig. 9 (b), 10 (b). When the sliding shaft 55 of the fastening device 51 is in a normally extended forward position Position with respect to the main unit 54, i.e. during the rest periods of the fastening device 51, the stop 62 at the rear end of the slide shaft 55 contacts the hook end 70a and pushes it, whereby the hook element 70 is moved slightly forward and the block section 70d, which the swivel arm 68 contacted, the spring 72 supported, so that the pivot arm 68 is rotated so that the half 68b the spool extension 66 slides so that the spool 64 is displaced rearwardly into one position is, in which the air duct 67 to the air inlet 60 and

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the air outlet 61 is oriented as shown in Fig. 10 (a), 10 (b) show. In other words, the fastening device 51 exists during the idle times a fluidic connection between the air inlet 60 and the air outlet 61 of the signal generator.

When the fastening device 51 is in operation, the sliding shaft 55 moves with respect to the Main unit inwards and in this case instead of 62 touches the hook end 70b and pushes it, whereby the hook element 70 is shifted slightly backwards. The hook element leaves it by virtue of its own Block section 7Od pivot arm 68 against the force of spring 72, whereby the block half.68b comes out of contact with the coil body extension 66 (Fig.9 (a) and the coil body extension will be able to the force of the spring 65 against the front end 63a of the Cylinder 63 pushed into a position in which the air duct 67 in the coil body 66 with the air inlet 60 and the air outlet 61 is no longer in communication (Fig. 9 (b). In other 'words, if the fastening device is in operation to a fastener 38 on a To apply the object, air from the inlet 60 cannot get into the outlet 61. During the operation of the fastening device 51, air pressure builds up at the inlet 60-open and then acts as a trigger on the monostable Item 79, described below when the Operation of the fastening device 51 comes to an end and fluid communication between inlet 60 and outlet 61 is then re-established.

If you take a look at Fig. 11, you immediately see that the circuit diagram shown there flow

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middle way in a drive control according to a first Embodiment of the invention represents. In the drawing, the dashed line generally corresponds to 22 is indicated, the control loads 22, which is fixed on the frame 1, and moreover the elements already mentioned are schematically with the corresponding reference numerals indicated.

Air for the entire circuit is initially obtained from a compressed air source AC or other suitable device delivered, for example under a pressure of 4-5 kg / cm. The air supplied first passes through a filter Fl and then splits into two paths, one of which leads to the first control circuit that feeds fasteners controls from the hopper 2 to the distribution station 18, as well as into a second control circuit, the distribution of the fastening elements 38 from the distribution station 18 to the fastening device 51 itself regulates.

After passing through the filter F1, the air is divided by a regulator Rl or an oiler 01. Air that has passed through the Oeler 01 contains OeI for lubricating the various mechanical parts and arrives via a line P3 to the fastening device 51 and along a line P6 to a switching valve B1 held in a normally closed position by a spring, and on to a Oscillator 82 included in the above-mentioned shift unit 13 (Fig. 2). The valve Bl opens by a Output which is fed via a line P8 and from an outlet opening 80 F2 of a bistable element 80 is coming.

The oscillator 82 has two chambers, namely an upper chamber 82a and a lower chamber 82b and is can be moved in two positions, namely in an upper one

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Position-U- and into a lower position L. Assuming that the valve B1 is open when the oscillator 82 'is in the lowest position L, the upper chamber * 82a provides a connection between the line P6 and the lower one Line 6b, which leads to the air cylinder 6. When air is drawn in through the lower inlet pipe 6b, the piston of the air cylinder 6 is raised and at the same time a part of this inlet air is led through a feedback line 6b *, so that pressure to raise the oscillator 82 in the upper position U is applied. Air is exhausted from the cylinder 6 via an upper pipe 6a. When the piston has reached its top dead center position, the pressure of the air in the feedback line 6b ^{1 is} so great that the oscillator 82 is raised to the upper position U. When the oscillator 82 is in the upper position U, the lower chamber 82b establishes a connection between the line P6 and the upper line 6a. Air supplied through the upper inlet pipe 6a causes the piston of the air cylinder to move downward, with air being discharged from the cylinder 6 through the lower pipe 6b, and at the same time a part of this inlet air is passed through a feedback pipe 6a, see above that pressure to move the oscillator 82 to the lower position L builds up. When the piston of the air cylinder 6 reaches its bottom dead center, the air pressure in the feedback line 6a. ^{1 is} sufficiently large that the oscillator 82 moves into the lower position L, whereupon the process sequence described so far is repeated. The piston of the air cylinder 6 therefore moves back and forth and the drum 3 is rotated, conveying fastening elements 38 from the funnel 2 onto the chute 16, as all of this has been explained in detail above.

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Air that passed through the relay R1 is fed to a main line P1 and a line P2. The regulator Rl is spring-loaded and normally lets air through the lines Pl, P2. Part of the air flowing through the regulator Rl is fed to a feedback line Rl 'and counteracts the force of the opening spring for the regulator Rl, whereby at a certain pressure of the air flowing through Rl the force of the air in the feedback line Rl ¹ is exercised, sufficient to close the regulator Rl; the regulator Rl does not return to its open position until the pressure of the air in the feedback line Rl ^{1 has} fallen below a certain value.

The air supplied through the main line P1 runs through a switch S1 and a limiter opening to the channel 30 of the fan 20. A line Pll, which branches off from the line Pl and contains a restrictor opening, carries air the signal generators 28,29. The line P2 leads to a normally closed switching valve B2, which is to the Distribution station 18 leads. The distribution station 18 is further connected to the line via a feedback line P2 connected to ensure the necessary air pressure for feeding the fasteners 38 into the manifold 18,

The output from the signal transmitter 28, which is higher on the chute 16, is fed to the two lines P 101 and P 102 via a line P10. The line P 101 leads to a control port 78A of the NOR element 78, the line P 102 leads to an input of a delay valve DVl. The output of the delay valve DVl leads to a control port 8OB of the above-mentioned bistable Element 80. The delay valve DVl is further via a line P 103, which has a limiter opening,

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23587

connected to the main supply line Pl. The exit from the lower signal transmitter 29 is along a line P9 of the other control opening 78B of the NOR element 78 supplied. The NOR element 78 has an outlet opening 7.8 P at which an output is only generated becomes, "if the input for both control openings £ 78, 78B is zero or one. The outlet port 78F of the NOR element leads to the other control opening 8OA of the bistable element 80. The input of the bistable element 80 from the NOR element. 78 generates a Output from bistable element 80 created at outlet port 80F2. An input from the delay valve DVI has an output of the bistable element 80 generated at the other outlet 80Fl. the upstream supply of the elements 78,80 happens via the lines a11, a 12, which from a line al come that leads to a line a. The line a is connected to the main ' line P, in connection.

A line P4 containing a restrictor opening provides a connection between the main line Pl and the air inlet opening 60 of the signal transmitter 52 of the fastening device. The outlet 61 of the signal transmitter 52 is connected to the above-mentioned monostable element 79, that works as a tilting mult! vibrator over and over a line. P5. The output from the monostable element

79 is used as' an input of a control port 8IB of a

bistable element 81 supplied. This input leaves the bistable element an output at the outlet opening Generate 81Fl, which leads to a line P7, which in turn in turn to a normally closed switching valve B2 leads. When output from the outlet 81Fl des

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OBlölNÄL INSPECTED

2353703

bistable element is supplied, namely via the Line P7, the switching valve B2 is moved against the force of a closing spring into a position in which the Valve B? establishes a connection between the distribution station 18 and the feed line P2, whereby the distribution station 18 is triggered and a fastener 38 of the fastening device 51, as already explained above, feeds. The entrance to the other control opening 81A of the bistable "element 81 comes from a timer TM.

The timer TK is available both directly and via Measuring valve TMl in connection with line P7. The timer TM is further with the main line Pl via a Line Tl connected to a limiter opening. The entrance from the timer TM to the bistable element 81 · produces an output from the element 81 at the other Exit port 81F2, whereby air along line P7 to the switching valve B2 is cut off, the valve B2 returns to its closed position due to the closing spring, the air supply along the line P2 to the distribution station 18 is interrupted and the operation the distribution station 18 is terminated. The upstream of the supply to elements 79 and 81 is via the conduits a21, a22, which in turn have a line device a2 are connected to the aforementioned line a.

The description is now with the explanation of the operating behavior the first control switch, which is necessary for the existence of a sufficient supply on fastening elements 38 in front of the distribution station 18 cares.

Operation begins when the switch S1 is switched, where-

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air flows from the air compressor AC through the filter F1 and the realer R1 into the main line P1, whereupon air is supplied to the fan 20 and to the upper and lower signal jacks 2fc., ~ '9. Assuming initially that no fastening elements are present on the slide 16, then the air streams 33a column j, the signal transmitter p 48,29 bridge interrupted by air _f - the gerictvte from the nozzles 32a, 32b downward -t vv: rd (see also Figs. 5, 6) There is therefore no output signal from the signal generator 28 along the line FlO, and from the signal generator 29 there is likewise no AuEf.-anoss signal along the line P9, and consequently none Kinij _t -: na along the line P102 to the delay valve DV1 or along the line P 101 ,, P9 to the control openings 78; =,. 78b "of the NOR element 78. De an input neither at the control opening 78a, nor at of the control port 78b is present, an output from the NOR element output .78F "is als-input sur. Control opening 80A of the bistable FM ententes 80 «, whereby the output from the element 80 is passed on to the output opening 80F2. This output is continued ISngs of the line P8 and opens the switching valve B1, whereby air is supplied from the oil and along the line P6 to the oscillator 82, the air cylinder 6 is triggered and the fastening elements 38'-auf'.die slide 16 through the Drum 3 are conveyed · The supply of fasteners

on the chute 16 takes place generally faster than., the consumption of the fasteners by the fastening device 51, so that the supply of fasteners 38 vox the distribution station on the Slide. 16 gradually builds up. When the number of fasteners 38 on the slide 16 "got so big is that a fastener 38 between the fan · nozzle 32b and the / lower signal transmitter 29 is

409824/0746

BAD OR * e? NAL

the signal generator 29 generates an output along the line P9, which leads to the control opening 78B of the NOR element 78, while the output of the upper signal generator 28 remains Mull. The conditions on the lines FIO, PIOl, P] 02 therefore remain unchanged, but the output from the outlet 78F of the NOR element ceases so that there is no input to the control opening 80A of the bistable element 80. However, there is no switching input for the control opening 8OB, so that the output of the bistable element 80 continues to be generated at the outlet opening 80F2 and the drum 3 is rotated further and fastening elements 38 are conveyed from the funnel 2 onto the chute 16. When the fastening elements 38 on the slide 16 reach the height of the upper signal transmitter 28, air from the nozzle 32a can no longer interrupt the air jet bridging the gap 33a of the signal transmitter 28, so that the signal transmitter 28 generates an output which is via the Lines PlO, PlOl, P102 is forwarded. The input along line P 101 for the NOR element, or its control opening 78A, does not change the state of the NOR element, since an input is already present at opening 76B. The output signal, which was transmitted along the line P 102, is passed on to the delay valve DV1. After about 0.5 seconds, the delay valve DV1 generates an output which is fed as an input to the control opening 8OB of the bistable element 80 and which allows the output of the element 80 to arise at the opening 80F1. The air supplied along the line P8 is therefore interrupted and the switching valve B1 is closed again due to its closing spring, so that the supply of the oscillator 82 from the line P 6 is interrupted, whereby the air cylinder 6 and the

409824/0746

BAD ORiQiNAL

Rotation of a drum .3 is no longer triggered or ceases, .and the fasteners 38 no longer the chute 16 are supplied. When fasteners 38 are fed from the distribution station '8 to the fastening device 51 for consumption, increases the number of fasteners 38 on the slide 16 - from. When the highest fastener on the Slide 16 comes below the level of the lower signal transmitter 29, the above-mentioned workflow runs again.

It is now on the 'performance of the second Control circuit received, the d.the transfer of fasteners 38 from the distribution station 18 to the fastening device 51 (Figure 8) controls, wherein it is believed that in the fastening device 51 no fastening element 38 is present and the

second control circuit is triggered by the sliding shaft 55 of the fastening device 51 is slid into the main unit 54, i.e. by the fastening device 51 is switched as if it contained a fastening element 38. This interrupts the fluidic connection between the air inlet 60, which is connected to the main line Pl via the line P4 stands, and the air outlet duct 61, which with the .line P5 is connected (Fig. 9). Air pressure builds up at the inlet 60, and when the sliding shaft 55 is moved away from the main unit 54 again, a connection is established between the inlet opening 60 and the outlet opening 61 (FIG. 10), a trigger signal on the Line P5 for the inlet port 49A of the monostable Element 79 generated. The monostable element 79 is generated then an output, which is used as an input of the control

409824/0746

BAD ORKSJMAL

at the

Opening 81B of the bistable element 61 is fed "and an output of the bistable element 81 at * the outlet opening 81Fl generated. The output from the monostable Element 7 ° is immediately interrupted because the air flow to it ceases and because of the impedance of the line P5; however, the element 81 remains switched until tab; Ie and generates an output at port 81Fl to on Entrance at the control opening'8 IA, as further below described appears.

The exit from the stable element 81 is longitudinal of line P7 and opens the switching valve B2, as well as the timer TM. When the valve B1 opens, air is released from the distribution station 18 through the line P2 and a fastening element is forwarded to the fastening device 51 as described. While the distribution station 18 is thus in operation, the timer unit TM and after the expiry of the preset Time, the timer TM delivers a switching signal along the line T2 to the control opening 8IA of the bistable Element 81..The output of the bistable element B1 will therefore appear at exit port 81F2, whereupon the supply along line P7 is interrupted and the switching valve Bl will close again, whereby the supply along the line P2 to the distribution station 18 as well as the operation of the distribution station 18 In other words, the duration of the operation of the distribution station 18 is determined by the setting of the timer TM. When the fastening device 51 is actuated, the fastening element 38 is fed to it was to be driven into an object, the workflow described so far is repeated.

The following is a second embodiment of the invention

409824/0746

explained, which is shown in Figs.: -2-18. ■ «

In FIGS .. 12 and 13, a fastener-Zuführvorri-htuna is shown, which in size and a whole in a similar "deise as the device shown in Figures 1 and 2 operates, and which in oeeiqneter manner by a * Drive control according to the The fastening element feed device according to FIGS. 1 and 13 has a funnel 85 which is mounted on a frame 84 and has a drum -86 equipped with spoons 87 is, which fastening elements are conducive for rotated drum 38 from the hopper 85 to a guide chute 102, the fastening elements 38 in a slide 101 passes on _e the chute 101 has two parallel rails 10ia ₉ 101b, which are inclined downwardly and extends from a location in the extend substantially above the funnel 85 to ms of a delivery station 103, which is arranged below and in front of the funnel 85 »Those parts d he rails 101 and 102, which are outside of the hopper 85 are supported by support arms 106 · Ber front portion of the chute 101 is also equipped since rails 105, which ¹ will serve to provide a suitable separation between the fixing springs. Stigungseleinenten 38 ₉ slide down the slide 101 to maintain. A deflector wheel 104 is provided just in front of the exit of the chute 101 from the funnel 85, which deflects incorrectly aligned fastening elements 38 back into the funnel 85. The drum 86 is rotatably mounted on a shaft journal 89 which is mounted in the frame 88. The frame 88 is supported by a vertical plate 100 which is fixedly attached to the frame 84

409824/0746

', --... -.BAD-OWQINAL

-2S-

is. A substantially at right angles projecting from the plate 100 bearing 9 ^r <dier.t for holding a vertically standing cylinder rod 96, the lower end of which with the upper emie of the piston of a vertically standing air. Cylinder 90 is attached, whereby triggering of the air cylinder 90 causes the cylinder rod 90 to move back and forth up and down. The drum 86 is set in rotation by rotating a gear 91 which is attached to it and coaxially with it on the shaft 89. The ten wheel 91 is rotated by pawls 920, 92b provided at the respective ends of link arms 93a, 93b, the other ends being rotatably mounted on the shaft 89. The ends of the hinge arms 94a, 94b are in rotatable engagement with the hinge arms 93a, 93b..The other ends of the hinge arms 94a, 94b are rotatably connected to a block 95 which is fixedly arranged at the upper end of the cylinder rod 96, whereby through , Actuation of the air cylinder 90 is caused to rotate the drum 86 in the same manner as that explained above in connection with the first embodiment of the invention.

In the second embodiment, an oscillator unit 13 is not provided, but the control of the air cylinder 90 is provided by a reciprocating valve 98 and a switching part 97. The reciprocating valve 98 is supported at a location on the plate 100 near the cylinder rod 96 and has a tab 98a that extends toward the cylinder rod 96. The switching element 97 is attached to the piston rod ^q 6 and moves with her up and down; the switching element 97 has an upper switching ring 97a and a lower switching ring 97b. The valve tab 98a is pushed by the lower switching lug 97b or pulled by the upper switching lug 97a, depending on whether the piston rod 96 is the upper or lower

409824/0746

BAD ORKSiNAL

Has reached the turning point, causing the reciprocating Valve 98 is operated and the. Air flow to the cylinder 90 controls, as will be described in detail below. In addition, in the second embodiment, the control box 22 is through a control section CS replaced, which is arranged below the funnel 85 and has throttle valves 150, 155, switching valves 149, 153, switching valves 146, 151 and a start button 156a, which will be discussed in detail later.

As can now be seen from "FIGS. 14 and 15, the lower End of chute 101 with distribution station 103 connected via connector tabs 108. The distribution station works in the same way as the fastener distribution station in the first embodiment and comprises a main body 109, a solid block 116, which sits firmly on the main housing 109 and in what a guide channel 107 opening into a connecting piece 117 is provided for a fastening element, as well as a Shift block 112, which is between the fixed block 106 and <the main housing 109 is slidable and one Has cutout 112a in which fasteners 38 from the lower end of the chute 101 to the guide channel 107 can be passed on. A spring loaded one Piston III is displaceable in a cylinder 110, which is shown in FIG the main housing 109 is formed and on opposite Ends with cylinder covers 114,115 is provided. One end of the piston 111 is located outside the main housing 109 and is connected to one end of the sliding block 112 via a fixed connecting plate 113, so that by actuating the piston 111 at the same time the shift block 112 is shifted. Air is the distribution station 103 in a manner to be described supplied and operated the distribution station 103 so that ei'n fastening element 38 from the slide 101 into the

409824/0746

Guide channel 107 is passed. Fasteners 38, which have been transferred in this way, are 'fed to the connecting piece 117 by compressed air, then pass through a manifold 118 connected to the connector and reach dsnn the feed pipe 12 3 der'Befestiqunasvorrichtunq 119.

Fan takes from the representation of the fastening device in FIG. 16 that it has a front section 124, a pneumatically driven screwdriver 125 or the like. a sliding shaft 124a, a main unit 120 and a handle 126. The sliding shaft shifts in the main unit 120 when the fastening device is in operation and remains extended forwards relative to the main unit 120 by means of a spring 127 during the working breaks of the fastening device 119. A stop 128 is on the rear section of the sliding shaft 124 rnqeordered. When the fastening device 119 is used to drive a fastening means 38 into a gectenstanc and the sliding shaft 124 is moved into the main unit 120, the stop 128 triggers a signal transmitter 121 which is connected to the main unit 12G via screws 122a, 122b.

Fig. 17 shows the signal transmitter 121, which has a main block 130 in which valve chambers 139a, 139b and a connecting passage 136a and an outlet passage 136b are formed. The longitudinal axes of the valve chambers 139a, 139b are essentially parallel to the longitudinal axis of the signal transmitter 121, and the chambers 139a, 139b are one behind the other arranged, wherein the chamber 139a is located in front of the chamber 139b with respect to the signal transmitter 121.

409824/0746

BAD ORKSiNAL

The rear end of the valve chamber 139b opens

at the rear. Surface of the main block 130 and forms an inlet 131, with which a connector 134 is firmly connected. An inlet pipe 133 is on the connector 134 attached. The pipe or the line 13 3 leads air along the line LIa (which still further is explained below) to the signal generator 122. The front one The end of the chamber 139b tapers off and has a passage opening 135 of a small clear width in communication leading to the rear end of the other valve chamber 139a. Channel 135 will normally be sealed by a ball 143 which, under the load of a spring 142, against the front end of the Chamber 139b is printed with the nib in the chamber 139b is arranged *

It can also be seen in FIG. 17 that the front valve chamber 139a extends from channel 135 to the front of the main block 130 extends. A push rod 129 can be in the chamber 139a to be moved. The front section of the push rod 129 forms an enlarged diameter section and slidably fits through a stopper screw 141, which is attached to the front end of the chamber 139a is. The rear portion 129b of the push rod forms a reduced diameter portion that fits through channel 135 and can extend into rear valve chamber 139b. An expansion spring 140 in chamber 139a is around push rod 129 arranged and acts with constant force on the push rod 129 against the front end of the chamber 139a and presses it into a position in which the front End 129a of the push rod 129 protrudes forward, namely beyond the end face of the main block 130.

409824/0746

When the push rod 129 is in this position, extends its rear portion 129b does not enter the channel 135. When the fastening device 119 is operated, and the sliding shaft 124a is moved against the main unit, the stop 128 contacts, which is provided on the sliding shaft 124, the end face 129a of the push rod 129 of the signal transmitter and pushes the push rod 129 backwards into the Kemmer 139a against the action of the spring 140, When the push rod 129 is moved rearward in this way, its rearward part 129b reaches in and through 'channel 135 and pushes ball 143 backwards so that air entering through inlet 131 can now flow through the chamber 139b, through the channel 135 and into the chamber 139a.

The above-mentioned connection channel 136a communicates with the chamber 139a and is substantially located perpendicular to the length of the chamber. The outlet— channel 136b is a continuation of the connecting channel 136a and is essentially at right angles to it, thus extends essentially parallel to the rear valve chamber 139b and forms an outlet 132 at the rear of the main block 130. A connector 137 is fixedly inserted into the outlet 132 and establishes the connection to a hose 138 or the like, the air is supplied to a line L4, which will be discussed further below. When the push rod 129 after is pushed backwards by stop 128, air entering through inlet 131 can therefore pass through chamber 139b and channel 135 into chamber 139a and from chamber 139a into and through channels 136a, 136b and from there into outlet 132. In other words, as a modification of the signal transmitter of the distribution

409824/0746

station in the first embodiment of the invention the signal generator 121 of the second embodiment generates an output signal when the fastening device 119 is in use.

Referring now to FIG. 18, a A circuit diagram of the flow paths in the drive controller according to the second embodiment of the invention are specified.

Air is supplied to the circuit from a compressed air supply AC or supplied to an appropriate suitable means. The air coming from the air compressor AC runs first through a filter 144 and then divides into two paths Ll and L2. The air flowing along the line Ll happens an oiler 145, the air oil for lubricating the various moving mechanical parts. The line Ll leads to two lines LIa and LIb, each the fastening device 119 and the Eirilaßrohr 133 of the signal generator 121, like the one on the left Hand is indicated in Fig.18.

Branch lines LIl, L12 ,, L. 13 lead away from the line Ll (lower right parts of Fig.18). The line LIl leads to a switching valve 153 which is spring-loaded and is normally closed. When the valve 153 opens in a manner to be described, then the valve 153 establishes a connection between the line LIl and the line L14. The line L 1.4 leads over a. Valve 156 to a line LlS * The valve 156 has two positions, ¹ , namely a position I, in which the valve connects the line L14 with the line L15, and a position II, in which the valve 156 connects the branch line L12 with the line LlS connects ·. Valve 156 is normally held in position I by a spring

409824/0746:,. _{; 7th} .

ORIGINAL INSPECTED

2353709

and can be moved to position II by pressing the start button 156a mentioned above, which is provided on the control section CS under the hopper 85. The line L15 leads to the already mentioned reciprocating valve 98 which is provided on the bearing 100 and is operated by the switching element 97 actuated, which is attached to the piston rod 96 (Fig. 12). The action of the valve 98 is now in Explained in detail.

It can also be seen from FIG. 18 that the line L 13 Air supplies an oscillator 154 which drives the air cylinder 90. The oscillator 154 has two positions, which are marked with U and L. When in the U position, the oscillator 154 sets a Connection between the line L 13 and a lower pipe 90b leading to the air cylinder 90. In in this case, air is introduced into the air cylinder 90 so that the associated piston is raised, the Air escapes through an upper conduit 90a. When the oscillator is in the L position, it connects the Inlet line L13 to the upper pipe 90a of the air cylinder 90 so that air entering the cylinder 90 causes the piston to move downward and escapes through lower conduit 90b. The oscillator 154 is normally held in the U position under the influence of a spring, but can be moved to the Position L are conveyed by compressed air, which is fed along the line L16 and a connection to the reciprocating valve 98 establishes.

The reciprocating valve 98 also has two positions, being either open or closed is. When the piston of the air cylinder 90 reaches its lowest point of reversal, the switch lug 97a pulls

40 98 2Α / 07Λ6

ORIGINAL INSPECTED

of the switching element- 97 the valve tab 98a and closes the valve 98. In this case, along the line L15 incoming air does not flow through valve 98, and therefore no air is fed along the line L16, the oscillator 154 is in the position U and air lengthways the input line L13 enters the lower pipe 90b. and causes the piston of the air cylinder 90 to rise. When the piston reaches its top dead center position, The switching nose 97b pushes the valve tab 98a and opens the valve 98. The valve 98 now sets a Connection between lines L15, L16 and the The oscillator pushes the air pressure supplied along the line L16. Oil position L so that the piston of the air cylinder 90 goes downwards »The function described so far is repeated as long as there is air along the line L15 is run. As mentioned earlier, there will be air along the line L15 only fed when the .Ventil 153 is open and connects the lines LiI, L14, or when the starter button is depressed and connects lines L12, L15.

The air entering line L2 initially runs by a regulator 147 which operates in a manner similar to the Controller Rl in the first embodiment of the invention is equipped with a feedback line to ensure that that the pressure along the line L2 does not exceed a predetermined value. The line L2 leads Air to the lines L21, L22, L23, each to one . Shuttle valve 151,. a switching valve 149 and a Shuttle valve 146 lead * '

The shuttle valve 146 "leads to a line L24, / the in turn leads to an air tank 148, and has two. Positions, namely 146A and 146B. The .Ventil 146 is

normally to position 146A by spring action pressed and in this position it establishes a connection between the line L24 and a line L41, which leads to the switching valve 149 and also connects to a line L42, which leads to a Exhaust valve 150 leads. The flow of air through the exhaust valve 150 is controlled by a throttle valve 150a. The valve 146 can be moved against the spring bias in the position 146B by air pressure, the longitudinal the aforementioned line L4 is fed to the Outlet pipe 138 of the signal generator 121 of the fastening device direction leads. The line L4 also supplies air to a line L5 which leads to the switching valve 151. if valve 146 is in position 146B, it connects lines L2 3 and L24 and disconnects the lines L24 and L41.

The switching valve 149 is normally operated by a spring closed, but can through to an open position Air pressure supplied along line L41. When it is open, the valve delivers 149 a connection between the line L22 and a line L25. The line L25 leads to the distribution station 10? and this air pressure causes them to be triggered,. where a fastening element 38 of the fastening device 119 is then fed.

The shuttle valve 151 leads to a line L26 which in turn leads to an air tank 152 and has two positions, namely 151A and ISIB. The valve 151 is normally put into position by spring action 15IA is printed and in this position the valve connects 151 the line L26 with a line LSi ^ which the latter leads to the switching valve 153 already mentioned and divides s still a connection to a line L52, establish the

40 * 024/0 * 48

ORIGINAL IMSPECTED

-37- '

leads to an exhaust valve 155. The air flow through the exhaust air valve 155 'is controlled by a throttle valve 155a controlled. The air delivered along line L51 shift t the switching valve 153 to the open state, in .which case the valve 153, the line LIl with the Line L14 as already described connects. The shuttle valve 151 can be switched to the position 15IB by air pressure be moved das.ihm is fed along the line L5. In the position 151 B the valve connects 151 lines L21 and L26 and separates the lines L26, L51. '

The description now starts with the explanation the function of the circuit mentioned continues the ensures that fastening elements 38 are divider station 10 3 to the. Fastening device 119 reach; then the function of the circuitry which causes the drum 86 to be fed von'Befestigungselemente 38, aus.dem funnel 85 for Slide 101 promotes. These circuit functions run at the same time from what can be imagined one after the other regardless of the description.

When the fastening device 119 is actuated, the channel 135 in the signal transmitter 121 (Fig.17) is opened and,. Air is from the air compressor AC. along the line ;; L1, the line LIa, the line L4 fed. Air flow along line L4 pushes shuttle valve 146 to position 146B, whereupon the along the lines L2, L23 supplied air .by the Valve. 146 flows along the line L24 and .in the .Tank 148 and stored in the tank 148. if the fastening device 119 is not released for a long time, the sliding shaft 124 is disengaged from the main

409824/0746

23587G9.

hext 120 moved out under the influence of spring 127, the ball 143 ir. the signal generator 121 closes the channel 135 as already described * the air supply line L4 is therefore interrupted and the shuttle valve 146 is pushed back into position 146A by a spring. The lines L24, L41 are now connected and the air stored in the tank 148 is now flowing from tank 148 along line L24 through valve 146 and along line L41. This air exerts pressure to open the switching valve 149 and continue stroking through the line L42, and is at the atmosphere through the Discharge exhaust valve 150.

When valve 149 is open, air is along the lines L2, L22 is supplied and passes through the valve to line L25, and is taken from line L25 to the distribution station 103 supplied, which is then triggered, and a fastening element 38 of the fastening device 119 supplies. If the amount of air released to atmosphere has become too great that the pressure on the line L41 is no longer sufficient to counteract the closing spring for the valve 149, the valve 149 closes so that the supply of air from the line L22 to the line L25 is interrupted and the operation of the distributor 103 ends. The delivery rate through the exhaust air valve 150 depends on the setting of the throttle valve 150a, the operating time the distribution station 103 can be adjusted by appropriately adjusting the valve 150a.

Referring now to the function of the circuit for the The drum 86 is triggered and activated when the fastening device 119 is actuated, Air is supplied to line L4 as already described. Line L4 supplies air to line L5. The air pressure The shuttle valve 151 pushes on the line L5

409824/0746

■ -39- ■

to the position = 1Mb, which creates a connection between lines L21 and L2 €. The air supplied along the lines L2 ·, L21 · flows through the valve 151 into the line L26 and into the tank 152 and is stored in the tank 1.52. When the operation of the fastening device 119 is ended, the air supply line L4 and thus also to the line L5 is interrupted and the shuttle valve 151 returns to reason. their return spring back to position 15-IA, the. Line L26 is connected to line L51. On that. _: , air flows from tank 152 through line L26 and valve 151 to line L51. The air flowing along the line L51 exerts pressure so that the switching valve "153 is opened", whereby a connection is established between the lines LIl and L14 and the air cylinder 90 is triggered, so the drum 85 sets as described The air supplied to the line L51 passes on to the line L52 and is released to atmosphere through the exhaust air valve 155 * If the pressure of the air in the line L51 falls below a certain value, the valve 153 reverses to its closed position due to the spring action, the connection between the lines / LIl and .L14 is interrupted and the operation of the air cylinder 90 stops when the piston reaches its top dead center, whereby the drum, 86 and the further supply of fasteners 38 stop from the funnel to the chute 101. The time span during which the air pressure in the line LSI _{; the} valve 153 can hold in an open position depends on the delivery rate the Luf.t through the exhaust valve 155, what. _{j :;} in turn depends on the setting of the throttle valve 155a. In other words, the duration of the operation of the air cylinder 90 can be adjusted by suitable adjustment of the throttle valve; tlIs 155a. As already described, pressing the button down causes the button

4098 ^ 4/0 ^ 41

that valve 156 is moved to create a connection between lines L12 and L15 , in which case air is continuously supplied to reciprocating valve 98 and oscillator .154 and air cylinder 90 is activated around drum 86 to drive, regardless of the conditions in the remaining part of the control circuit. Thus, the start button 156a can be manually depressed for a certain period of time in order to have an initial supply of fastening elements 38 on the chute 101, which is then available to the distribution station 103.

From the above description it should be clear that the invention provides a drive control for a Fastener feeder proposes that is extremely simple in construction, very effective and economical to operate. Air pressure to drive of the feeding device is not required with particularly high values, since the control circuit is compact and the space between the feeler beams on the fastener slide is just small. Furthermore, the control device uses only a few mechanical parts and the mechanical parts used are extremely simple in construction, which ensures is that the drive device is relatively trouble-free and easy to maintain. Next allows a simple Adjustment of the throttle valves in the second embodiment of the invention is an adjustment of the operating times of the various units of the feed device.

The drive control according to the invention also has an economic advantage that is evident in the sale of the Establishment noticeable? it consists in the fact that the Drive control very easy and easy to different

409824/0746

• -4 1-

Times for driving various feeding devices For fastening elements or small parts of various types Sizes' can be used. The control device is exclusively air-operated and there are no impermissible ones Limitations of the katerisis used in the construction or in the powered device. A major advantage of the drive control device is that it only needs a single source of energy, the obvious advantages in terms of assembly, ' which brings maintenance and economy.

Overall, a drive control was described with the heads having small parts, for example screws or other fasteners in any order in a storage vessel, such as a funnel can be stocked, continuously in required Alignment of a distribution station are supplied 'and individually from the distribution station. be fed to a powered fastening tool. The drive control has sensing elements that determine when the fastening tool needs a fastening element, and which turn on the distribution station with it a fastener is fed accordingly, and which the state of the supply of fasteners for the distribution station and establish a facility trigger, with the further fastening elements from the Stock can only be replenished if necessary, whereby a constant reserve in readiness for immediate Use for the distribution station and for feeding is kept ready for the fastening tool. the entire drive control is from a single pneumatic power source and can be directly connected to a feeding device for fasteners from different sizes can be used. -

409824/0746

BATH

Claims (5)

Expectations 1. Feuführvorrichtung for fastening elements with a storage container for a lot of fastening elements, with a transfer device (for example a rotating drum with scoops) for transferring fasteners from the storage container to a slide that extends between the storage container and a distribution station, the distribution station fastening elements individually removed from the chute and fed to a fastening device, characterized by a drive control (Fig. 11, 18) with a first pneumatic control circuit (Pl ...) which has one or more delay valves (DVL) and fluidic elements for controlling the transfer device, as well as with sensor devices (28,29), which the size of the fasteners supply on the slide (16) and emit different control signals depending on different supply sizes, and with a second pneumatic control circuit (P2 ....), which with the B. efestigungsvorrichtung (51) cooperates and the distribution station triggers (103) for supplying animal fastening device with fastening elements. 2. Apparatus according to claim 1, characterized in that the first control circuit has a sensor with a first signal transmitter and a second signal transmitter, a monstable fluidic element, a bistable fluidic element Element and a delay valve comprises, wherein 409824/0746 ORiQfHAL INSPECTED the first signal transmitter to the monostable element Input emits and the second signal transmitter an input to the monostable element and the delay valve outputs and the monostable element and the delay valve give inputs to the bistable element "and finally the bistable element has an output to '. "Actuation of the transfer device according to the received Inputs. 3. Apparatus according to claim -1 or 2, characterized in that the second control circuit is one with the Fastening device working signal source has that a monostable, fluidic element input— signals from the signal source as well as a bistable, fluidic Element receives an input from the monostable element and provides an output that triggers the distribution station; and that a timer (TM) the time period of the off-, qangs Controlled by the bistable element. 4. Device according to one of the preceding claims, characterized in that the first and the second Signal transmitters are arranged at different points on the slide and each have a free air jet produce; that a fan (32) is arranged on the slide (16) and a first nozzle (32a) and a second nozzle (3? b), the nozzles being the ones exited from them Air jet against the respective free air jet of the first and second signal transmitter to their Interruption directed 5. Fastener feeder with a Storage container for storing a lot of fasteners, a transfer device for transferring the fastening elements from the storage container a chute that goes from the reservoir to a ver- ., Teilerstation leads, in which the fasteners removed individually and attached to a fastening device be driven, characterized by a drive 409824/0748 2358701 control device with signal transmission to: del: Bofestigungsvöfrichtung UfId are intended to be triggered by it, with a first pneumatic Control circuit for triggering the transfer device and with a second pneumatic control circuit to operate the Vertiilerstatiön, the first ufid inputs from controlling the second control circuit receive the signal generators and adjustable valves are provided with which the function times the same are adjustable. 6 * Feeding device for fastening elements or other parts with a storage container and a distribution station for distributing the parts in a processing point, with a guide between the storage container and the distribution station and a transfer device that transfers parts from the storage container to the guide marked by a fluid-operated drive control, which has a first sensor (28) arranged next to the guide (16), which detects the supply of parts on the guide and emits various signals depending on the various supplies, with a first control circuit a delay valve and strörnuhgsfnittelbetriebthe Has elements _? the input signals are received from the acquired sensor and the transferring device corresponds to the input signals control with a second sensor (29) which is located at a desired location and which determines the supply of parts at this location and various signals depending on the various supplies, whereby a "! wide control circuit includes a timer and düreh Dtföfnunfsifiittei actuated elements, the input signal halls from the second sensor on ^ - and control the Veftöilerstätiön (1Ö3) so that parts are passed on to the processing center according to the received input files 409824/0746