DE1269067B - Device for feeding nails to a nail driving machine - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY GERMAN Äfft PATENT OFFICE

EDITORIAL

Int. Cl .:

Number: Case number:
Registration date:
Display day:

B 25 c

German KL: 87 a -18

1269 067
P 12 69 067.4-15
July 20 , 1955
May 22, 1968

The invention relates to a device for feeding nails by means of compressed air from a nail distribution device to a nail driving device operated with compressed air through a nail conveying line, their connection with the nail dispensing device by a guided in a cylinder Piston slide is closable, which in a rest position allows the entry of an individual in the Nagelzuteileinrichtung divided nail allows in the entry part of the nail delivery line, but at the same time the Connection of a compressed air line intended for nail delivery with the nail delivery line interrupts, and the direct application of compressed air from the rest position to a Nail delivery position is displaceable, in which it connects the inlet part of the nail delivery line with the compressed air line connects, but locks it off from the Nagelzuteileinrichtung.

In a known device of the type mentioned above, a manually operated valve is provided through which compressed air is fed to the piston valve via a line so that it is moved into the nail delivery position and thereby closes the beginning of the delivery line. The supplied compressed air is introduced into the delivery line through another line and is used here to deliver the nail lying ready in the delivery line.

This known device has the disadvantage that the person working with the device has to move of the piston slide a special valve, which is only used for this purpose, by hand for so long must actuate until the nail lying ready in the delivery line is fed into the device.

The invention is based on the object of supplying nails by means of compressed air from to create a nail dispensing device for a nail driving device serving a nail from the Nagelzuteileinrichtung after each executed blow of the nail driver is automatically fed to the nail driver.

The object is in a nail feed device of the type described in the introduction according to the invention solved in that to control the application of the piston valve with compressed air one in one Control cylinder guided control piston is provided and that the control cylinder with a line for compressed air released by the percussion piston during its percussion movement is connected to the initiation the application of compressed air to the piston slide moves the control piston out of its rest position.

This ensures that with each impact device for feeding nails to a nail driver

Applicant:

Karl M. Reich, 7440 Nürtingen

Named as inventor:

Dipl.-Ing. Adolf Cast, 7311 Oberlenningen

movement of the percussion piston, the application of compressed air to the piston slide is initiated and as a result, immediately after each striking movement, a nail lying ready in the nail delivery line dem Nail driver is fed. The operator only has to perform the stroke movement of the Trigger percussion piston; everything else then happens automatically.

The control piston can use the air supplied to the delivery line directly as a valve slide or control by being coupled to a pressure inlet valve which is located in the cylinder of the piston valve opening compressed air line is arranged.

In a further advantageous embodiment of the invention, a between the control piston and the plunger of the compressed air inlet valve arranged and provided for its actuation by lever a pawl arranged on the piston rod of the control piston is controllable in such a way that the lever by the pawl only a displacement of the valve stem during the return stroke of the control piston causing pivoting movement is granted that, on the other hand, when the control piston is advanced The pawl slides past the free end of the lever ineffectively. This will ensure that a Nail or the like can only be fed to the nail driving device when the hammering stroke of the driving piston is finished.

Appropriately, the device according to the invention is designed such that on the control piston a Nagelzuteilorgan is arranged for the allocation device. This results in a special one simple construction.

Further design features of the invention emerge from the subclaims.

809 550/128

3 4

In the drawing, embodiments of the adjacent closing piston 25 are covered, in the pre-invention shown. It shows the pushed position of the control piston 21 against it

Fig. 1 is a schematic representation of the control is released, so that the out of the conveying air line

organs of the compressed air delivery device in the longitudinal 16 'in the cylinder 20 between the working piston

cut, 5 24 and the closing piston 25 entering conveying air

F i g. 2 is another embodiment of the

F i g. 1 in longitudinal section, arranged opening 31 in the conveying air line 16

F i g. 3 shows an excerpt from FIG. 2 can get lost in and flow off into cylinder 1,

on a larger scale, In the not painted by the control piston 21

F i g. 4 and 5 further excerpts from FIG. 2 io part 32 of the interior of the cylinder 20 opens

on a larger scale. a flexible air line 33, which is connected to the

Is connected to the device, not shown, for setting the nail driving device beat of nails, whose piston in a cylinder and through which the piston of the nail hammering device can be acted upon by compressed air during the working stroke of the hammer slide acts on a held ready nail, air is fed to the cylinder 20, which is a compressed air delivery device for feeding the displacement of the control piston 21 from its resting nails connected to the device. To position against the action of the compression spring 23 Control of the compressed air delivery device is caused in.

a cylinder 1 sliding piston valve 2 in front of the end face facing the compression spring 23

seen that at the same time as a passage for the 20 of the control piston 21 is also a cylinder

a piston rod 35 which is designed in a known manner and which penetrates 20

direction 3 supplied nails 4 is formed. At the end of the one at the end face 36 one

for this purpose, the cylinder jacket has two rails 37 of the continuously feeding one another nails 4

opposite passage openings 5 and 6 for nail dispensing device 3 along sliding carrier

the nails 4, of which the upper, 5, is formed with a 25 38. In the driver 38 is at its

underneath the nail dispensing device 3, the side facing the rail 37 such a

Nail collecting funnel 7 and the lower one, 6, provided with the assumption 39 that this

the nail driving device connected benem control piston opposite the rail 37 to

Nail feed line 8 is in communication. This lying comes, one slipping out of this

Nail feed line 8 consists expediently of 30 nail 4 and receives when sliding back

a flexible metal hose, the control piston 21 in its rest position in the nail

from a suitable collecting funnel 7 that seals it airtight. The one about the recess

Material is surrounded. 39 protruding and the rail 37 covering

The under the action of a compression spring 9 part 41 of the driver 38 prevents a

The upright piston slide 2 lies in its non-35 further slipping in the rail 37

acted upon position with its nails 4 guided by the compression spring 9.

remote end face 11 on one in the inner wall. The mode of operation of this control device is

12 of the cylinder 1 screwed in stop bolts have the following:

13 in such a way that one for the passage of the nails 4 in the working stroke of the hammer piston the piston slide 2 provided transverse bore 14 40 driving device displaces this in the with the passage openings 5 and 6 located in the part of its cylinder facing the nail 1 comes to cover. borne air and pushes it through the air line 33

In the cylinder 20 not rubbed by the piston valve 2, under the action of the small controls Part 15 of the cylinder opens onto a piston 21 counter to the action of the compression spring 23 not shown compressed air generator connected 45 is moved so far until its working piston 24 Conveying air line 16 is also applied between the stop bolt 28. As a result of this Nail feed line 8 and the cylinder 1 a displacement of the control piston 21 has its Connection line 17 for the closing piston 25 from the conveying air line, the opening 29 of the conveying air 16 Conveying line 16 'entering the interior of the cylinder 1 is released so that the conveying air air is provided, the inlet opening 18 of which in the 50 between the closing piston 25 and the working rest position of the piston valve 2 covered, enter piston 24 in the cylinder chamber 20 and its position acted upon by the conveying air through the opening 31 and the conveying air line 16 against it is released. can flow into the space 15 of the cylinder 1.

To control the entry of the conveying air into the pressurized conveying air

The cylinder interior 1 is in the conveying air line 16 55 causes a displacement of the piston slide 2

one of a sliding in a cylinder 20 against the action of the compression spring 9 such that

Control piston 21 existing control member inserted the passage openings 5 and 6 in the jacket of the

switches. The cylinder 1 covered by the piston valve 2 under the action of a compression spring 23,

standing control piston 21 has a working piston on the other hand, the inlet opening 18 of the connection

24 and a closing piston 25, which is released through a 60 line 17 to the nail feed line 8

Central piston 26 with a smaller diameter with is. In this position of the spool 2, in the

are connected to each other. Between the working the nail feed line 8 against the atmosphere

piston 24 and the closing piston 25 is closed in the interior, so the conveying air can in the

wall 27 of the cylinder 20 a stop piston 28 so enter nail supply line and the already in the

screwed in so that the opening 29 of the nail located immediately 65 for the drive-in

to the air pressure generator connected part 16 'promote device.

of the conveying air line in the rest position of the control unit.

piston 21 of which device on the stop pin 28 now has its return stroke, so the pressure is sufficient

5 6

the air displaced by the impact piston not conveying air line 16 'entering conveying air

more off, the control piston 21 against the action of the compressed air valve 42 and one in the cylinder wall

to hold the compression spring 23 so that it enters the cylinder 1 from the provided bore 48

the compression spring 23 can be returned to its rest position. If the control piston 21, however, of the

is pushed. In this rest position, however, the compression spring 23 is pushed back into its rest position,

Closing piston 25 of the control piston 21 again so that the lever system 43, 44 on the

the stop bolt 28 and covers the opening 29 tappet 45 applied pressure, so that the valve

the conveying air line 16 'from, so that no conveying air plate 46 from the compression spring 47 again against his

can flow. The consequence of this is that the seat is printed.

The pressure force of the spring 9 predominates and the piston io As in particular from FIG. 3 can be seen Slide 2 is so far back into its rest position - the valve tappet 45 is not firmly attached to the valve disk 46 pushes until it is connected with its end face 11 to the, but independent of this in its Stop bolt 13 strikes and the transverse bore is mounted displaceably in the longitudinal direction. Also is 14 in turn with the passage openings 5 in the valve tappet 45 an axial bore 49 and 6 covers. In this position, therefore, the conveyor 15 is seen, the one facing away from the valve disk 46 air line interrupted, however the connection end 50 via a transverse bore 51 with the atmosphere between the nail supply line 8 and the nail sphere is in communication. Used by the lever collecting funnel 7 produced, so that the pressure on the valve stem 45 of the system 43, 44 Nagelzuteileinrichtung 3 exercised in the nail catcher, so this sits with its valve plate 46 funnel 7 discarded nail 4 through the transverse boom 20 facing end face 52 firmly on the sealing tion 14 slide into the nail supply line 8 surface 53 of the valve disk 46 and lifts can then by then in the nail this from its seat. On the other hand, he leaves about that feed line entering conveying air of the knocking lever system 43, 44 caused pressure on the valve device to be fed. plunger 45 after, the compression spring 47 pushes the

The advantage of this device is above all that 25 valve plate 46 again against its seat. Since the can be seen that both the control element of the pressure valve tappet 45 with its end face 52 only air conveying device and the Nagelzuteileinrich- loosely on the sealing surface 53 of the valve is seated by one and the same control piston 21 in plate 46, which can be controlled after the closing of the dependency on each other, with compressed air valve 42 in its interior space 54, which is again connected to the cylinder interior with the displacement of the control piston 21 from 30 space 1, under the working stroke of the impact piston Impact is dependent on increased pressure standing air through the inlet device. If, for example, the opening 55 on the impact piston facing the valve disk 46 performs a working stroke, the end face 53 of the valve tappet 45 will penetrate its axial bore 49 through this and through the transverse bore, which on the one hand closes the 35 51 in to drain the atmosphere. Through the nail supply line 8 and the entry of the conveying air arrangement of this axial bore 49 in the valve in the nail supply line 8 and on the other hand a plunger 45 is a venting of the valve interior displacement of the driver 38 of the Nagelzuteilein- space 54 as well as the cylinder interior 1 and direction 3 in its provision has the consequence. It thus a return of the piston valve 2 in its rest position is guaranteed immediately after striking a 40,
A nail already held in readiness in the nail in the case of the FIG. The nail 4 of the nail molding of the invention is supplied to the lever system 43, 44 in such a way as an impact device. As a result of the return stroke on the piston rod 35 of the control piston 21 angedes impact piston, the control piston 21 directs that the compressed air valve 42 returns to its rest position with each advance, the access of the 45 thrust of the control piston 21 being opened. So that conveying air is interrupted and thus the nail feed, that is, the line 8 passing through the compressed air valve 42 is in turn connected to the conveying air flowing above it into the nail collecting funnel 7 at about the moment. At the same time nail supply line 8, when the driving piston pulls the control piston 21 the driver 38 with the driving device exerts a working stroke, a nail 50 located in its recess 39. This simultaneous entry of the conveying air into the back, whereby the nail 4 carried along can enter the nail-nail supply line however, under certain circumstances, the collecting funnel 7 is thrown off and through which the nail 4 is fed through the nail feed transverse bore 14 into the nail feed line 8 organ of the driving device can enter. In the following working stroke of the hammering piston before the previous nail was hammered in again, the 55 was then repeated and this the same process as already described above. Feed organ against the nail feed line 8

In Fig. 2 is a somewhat differently trained training has covered. To such a disruption of the nail guide shape the facility shown to avoid when feeding, care must be taken namely, the conveying air line 16 'does not immediately mean that the conveying air only passes through after it has been completely terminated the control piston 21, but indirectly through 60 movement of the working stroke of the impact piston special compressed air valve 42 is shut off. for example during the return stroke of the control unit Compressed air valve 42 will enter the nail feed line 8 by means of a piston 21 Piston rod 35 of the control piston 21 can be articulated.

Lever system 43, 44 actuated, which in the F i g. 4 and 5 is a training of the

Exercise of the control piston 21 against the action 65 control piston 21 and the one to be actuated by this

the compression spring 23 by means of a plunger 45 a lowing lever 44 shown on an enlarged scale,

Lifting off of the valve plate 46 counter to the effect that meets this requirement. With this out

the compression spring 47 caused, so that the guide form is to operate the lever 44 on

the piston rod 35 has a pawl 61 which can pivot to a limited extent. During the working stroke of the control piston 21 in the direction of the arrow 62, the pawl 61 slides with its inclined surface 63 freely over the opposite inclined end face 64 of the lever 44 and thereby leads how this in FIG. 4 is shown in dashed lines, temporarily a pivoting movement in the direction of the Arrow 65. After the end of the working stroke of the control piston 21, the pawl 61 falls into its original position and, as can be seen from FIG. 5, comes with its end face 66. before the the control piston 21 facing away from the side surface 67 of the lever 44 to lie. Does the control piston 21 now then its return stroke is effected by the piston rod 35 in the direction of the arrow advanced pawl 61 a pivoting of the lever 44 in the direction of arrow 69 and thus a Open the compressed air valve 42. As soon as the pawl 61 is the one shown in FIG. 5 reached position shown in dashed lines it releases the lever 44 so that the compressed air valve 42 under the action of its compression spring 47 is closed and the lever 44 can assume its rest position again.

Claims (6)

Patent claims: 1. Device for feeding nails by means of compressed air from a nail dispensing device to a nail driving device operated with compressed air through a nail conveying line, whose Connection with the Nagelzuteileinrichtung through a piston slide guided in a cylinder is closable, which in a rest position the entry of an individual in the Nagelzuteileinrichtung divided nail allows in the entry part of the nail delivery line, but at the same time the Connection of a compressed air line intended for nail delivery with the nail delivery line interrupts, and the immediate application of compressed air from the rest position can be displaced into a nail conveying position in which it is the entry part of the nail conveying line connects to the compressed air line, but shuts it off from the nail dispensing device, characterized in that a control cylinder in a control cylinder is used to control the application of compressed air to the piston slide (2) (20) guided control piston (21) is provided and that the control cylinder (20) with a line (33) is connected for compressed air released by the percussion piston during its percussion movement, which to initiate the loading of the piston: slide (2) with compressed air the control piston (21) shifts from the rest position. 2. Apparatus according to claim 1, characterized in that the control piston (21) with a compressed air inlet valve (42) is coupled, which is in the cylinder (1) of the piston valve (2) opening compressed air line (16 ') is arranged. 3. Device according to claims 1 and 2, characterized in that a between the control piston (21) and the plunger (45) of the compressed air inlet valve (42) arranged and provided for its actuation lever (44) by a on the piston rod (35) of the control piston (21) arranged pawl (61) is controllable in such a way that the lever (44) by the pawl (61) only during the return stroke of the control piston (21) is given a pivoting movement effecting a displacement of the valve tappet (45), that against it When the control piston (21) is advanced, the pawl (61) slides ineffectively past the free end of the lever (44). 4. Device according to one of claims 1 to 3, characterized in that on the Control piston (21) a nail allocation member (38) for the allocation device (3) is arranged. 5. Apparatus according to claim 4, characterized in that a part as Nagelzuteilorgan of the control piston (21) is provided, the one transverse to the lower end of a nail guide rail (37) guided nail driver (38) forms. 6. Device according to one of claims 1 to 5, characterized in that the valve tappet (45) of the compressed air inlet valve (42) can be axially displaced independently of the valve disk (46) is mounted and for venting the valve (42) an axial bore opening into the outside air (49), whose end face (52) of the valve tappet facing the valve disk (46) (45) provided inlet opening (55) when the valve (42) is open from which against the The end face (52) of the plunger (45) supporting the valve disk (46) is firmly closed when it is closed However, valve (42) is only loosely covered, so that the valve interior (54) located Compressed air can penetrate into the axial bore (49) and escape into the outside air. Considered publications:
German Patent No. 606 759;
U.S. Patent No. 1,703,458.1,980,967,
: 534 140, 2,544 165. 1 sheet of drawings 809 550/123 5.68 © Bundesdruckerei Berlin