EP0119542A1 - Nail driving tool - Google Patents

Abstract

The invention relates to a preferably pneumatically actuated nail driving device with a magazine for nails combined into straight rows or straight strips, which nails one after the other from the front end of a, optionally according to a staggering of their nails, via a lateral inlet channel leading into an expulsion channel into a guide Readiness for the eg pneumatic expulsion can be pressed out of the expulsion channel. To create a larger magazine capacity with a manageable volume, it is provided that the magazine is designed as a box magazine of a width for receiving two or more nail strips or rows next to one another and that the nail strips or rows are aligned one after the other perpendicular to the planes of the nail strips or rows can be pressed to the inlet channel of the expulsion channel. The invention also relates to a nail magazine unit with a holding element, which carries a number of nails arranged in at least one row, for being received in a magazine of a nail driving device. To increase the nail capacity when using a box-shaped nail magazine, it is provided that the holding element is plate-shaped with two or more grooves open on one side of the plate for receiving two or more rows of nails side by side.

Description

The invention relates to a nail driving device with a magazine for nails combined into straight strips or rows, which nails successively from the front end of a possibly inclined staggering of the nails, via a lateral inlet channel leading into an expulsion channel into a ready position for e.g. pneumatic expulsion can be pressed out of the expulsion channel.

In such a known nail driving device, a single nail strip can be received in the magazine, which consists of a number of staggered nails arranged one behind the other and connected to one another by means of lateral paper or plastic strips. Since the magazine must not exceed a certain length in order not to impair the handiness of the device, the magazine is capacity very limited. The nail strips therefore have to be replaced quite frequently, which makes working with such a device more difficult.

Nail driving devices are also known, the magazines of which have a drum shape and can hold up to 300 or more nails. The nails must be connected with a strip of plastic material or one or more steel wires to form an endless strip and rolled up into a coil that can be inserted into the drum magazine of the device. Although such devices offer a larger magazine volume than the strip magazines mentioned at the beginning, the coil magazines also have considerable disadvantages. Loaded with 300 or more nails, for example, they are quite heavy and not suitable for all users. The user does not have the option of inserting fewer nails into the magazine, since normally only a certain amount of coils are available. Another disadvantage of the drum magazine is that reloading is only possible when the coil is completely used up. In practice, this has proven to be extremely disadvantageous. If, for example, 150 nailings are carried out in a row when nailing a prefabricated house wall or a long workpiece, but there are only 50 nails left in the drum magazine, the user has to interrupt his work after 50 nailings, return to the storage location of the coils and reload the device; only then can he continue his work. Furthermore, loading the drum magazine is cumbersome and requires a lot of manipulation. For example, it is not possible to load a drum magazine without putting the device down, since opening the drum magazine and inserting the front end of the coil strip into the driver device requires both hands. In addition, the drum magazines must be very wide and wide, so that the Devices can often not be used in hard-to-reach places because the wide drum magazines are a hindrance.

The object of the present invention is therefore to develop a nail driving device of the generic type in such a way that it does not have the disadvantages previously described for drum magazines, and nevertheless has a larger magazine capacity.

This object is achieved in that the magazine is designed as a box magazine of a width for receiving two or more nail strips or rows side by side and that the nail strips or rows one after another perpendicular to the planes of the nail strips or rows in alignment with the inlet channel of the Ejection channel can be pressed.

Such a box magazine can also be loaded with up to 300 or more nails in the form of strips or rows, but it does not have to, since the total load is composed of comparatively short individual strips or rows, of which a more or less large number is in the box magazine can be used. If, for example, only a small number of nailings are to be carried out on a workpiece, it may even be sufficient to insert a single nail strip. The high weight of a full load of the box magazine then need not be accepted. It is also possible to carry out intermediate reloading at any time by pushing one or more nail strips into the box magazine in accordance with the number of nailing operations that are still to be carried out. Annoying interruptions of a nailing process due to reloading can result in them Way to be avoided. Reloading a box magazine according to the invention is very simple, since the corresponding nail strips need only be inserted from behind into an opening in the box magazine. A laborious opening of the magazine or threading the strip into the driver device is not necessary. The inserted nail strips or rows are inevitably pressed one after the other into the correct position aligned with the inlet channel of the expulsion channel when they are inserted into the box magazine. The box magazine according to the invention does not need to be longer than the narrow insertion magazines for a nail strip, which are customary up to now, they are only wider depending on the nail capacity to be accommodated, but can overall be kept so slim that the device can also be used in inaccessible places.

In an advantageous embodiment of the subject matter of the invention, the nail strips or rows are e.g. pressed by means of at least one spring in the direction of a fixed stop surface which is aligned with the inlet duct of the expulsion duct. The correct alignment of the respective nail strips or rows is thus carried out in a simple manner. Each time the first nail strip has been used, the next one inevitably moves into the correct feed position until the last nail strip is used up.

In a simple embodiment of the device according to the invention, the magazine can, for example, be fixedly attached to the device body and the stop surface can be formed by a side wall of the magazine.

It is possible that the tips of the nails are guided against the bottom of the fixed magazine, the floor is expediently adjustable in height, so that nails of different lengths can be processed with the same box magazine.

In a special embodiment of the invention, the transport of the nail strips or rows takes place in that at least one feed pawl projects in the direction of the interior of the magazine over the stop surface, which pawl engages between the individual nail shafts of the nails or the last nail in each case or one directly on the stop surface pressed behind nail strip or row. The feed pawl can thus advance the nails of a nail strip in the alignment position to the inlet channel of the expulsion channel in the direction of the expulsion channel.

The at least one feed pawl expediently yields elastically when there is a force acting on it from the loading side of the magazine, but it remains locked in a protruding manner when a force acts in the opposite direction. This has the advantage that the nail strips can be inserted without hindrance from behind into the box magazine along the stop surface, without having to pull back the feed pawls, but when the feed pawl moves forward, the corresponding engaging nail is carried forward. In addition, the feed pawls can be moved by moving along the box magazine from a front end position to a rear end position, where they can reach behind a nail shaft again without having to be withdrawn beforehand.

For simple and effective actuation, it is provided that the at least one feed pawl on an in Longitudinal direction of the magazine outside the stop surface, for example pneumatically and / or spring-actuated feed cylinder is attached.

The feed cylinder is expediently secured against rotation about its axis, so that the respective feed pawls do not accidentally disengage from the nail shafts.

The feed cylinder is expediently slidably mounted on a guide rod running parallel to the magazine.

It can also be biased against the action of a spring by shifting in the direction of the rear magazine end.

The displacement of the delivery cylinder against the action of the spring advantageously takes place from the air pressure intended for driving out the nail from a front to a rear end position. When this air pressure drops, the spring force can thus move the feed cylinder including feed pawl in the direction of the front end of the box magazine and thus press the foremost nail of the nail strip in the stop position into the expulsion position in the expulsion channel.

In a structurally particularly simple solution of the inventive concept, the feed cylinder in a cylinder space connected to the outside air has a helical spring received on the guide rod, which rests with its front end on an inner shoulder of the feed cylinder and at its rear end on a circumferential shoulder of the guide rod.

A simple pneumatic actuation of the feed cylinder is obtained when the guide rod has a bore which can be acted upon by the actuating air pressure of the working piston and which opens into a second sealed cylinder space of the feed cylinder.

In a further development of this proposal it can be provided that the air pressure in the second cylinder chamber is built up while the foremost nail is being driven out and is reduced again after the driver blade driving out the nail has returned to its upper starting position. Then the compression spring can push the feed cylinder back into its forward position.

The working stroke of the delivery cylinder should be at least twice the distance between two nails in the nail strip or row. On the one hand, this has the advantage that, in the absence of a nail in the strip or row, a next nail still comes into the driving position. On the other hand, after the end of a previous nail strip, the next one follows immediately, so that here too there is no interruption of the nailing process when the nail release button is pressed.

The features specified above apply in particular to nail strips or rows, the nails of which are arranged at such a distance from one another that the feed pawl can engage between the individual nail shafts. In a special type of nail strip with a modified nail head, the nail shafts in staggered nails are in direct contact with one another, so that engagement of the feed pawl between the nail shafts is not possible. In this case, a respective pawl reaches behind the rearmost Nail of a nail strip or a corresponding row of nails currently in the stop position. So that a feed pawl is always able to do this, two or more feed pawls are expediently provided in the longitudinal direction of the box magazine and the working stroke of the feed cylinder is expediently at least one nail thickness greater than the distance from the feed pawl to the feed pawl in the longitudinal direction of the magazine.

So that when the conveyor pawls are moved back into the new starting position, the nail strip that is in the stop is not carried back along with it, an unlockable pawl is preferably provided for engaging behind the nail shaft of a nail of the nail strip or row respectively resting against the stop surface. This pawl avoids moving the respective nail strip or row backwards, but because of the unlockability also allows the possibility that such a strip or row is removed again from the box magazine.

One type of known nail strip has a number of nails which are staggered at an angle to one another and embedded in a comparatively thick plastic band. These plastic strips are so wide that the nail strip in contact with the stop surface can be moved opposite and on the following one sliding forward without the nail heads hindering each other, which could be the case with nail strips in which the staggered nails are only with the sides glued paper strips are held together. In this case it is particularly advantageous if the nail heads or nail tips of the nails are guided in two or more guides running in the longitudinal direction of the magazine grooves are laterally displaceably accommodated, each of which can be aligned with the inlet duct of the expulsion duct. The guide grooves are so far apart from one another that adjacent nail strips or rows cannot interfere with one another in the event of relative displacement. Such guide grooves are not only able to receive the known nail strips from nails already connected to one another, individual nails can also be stored in the grooves.

So that the individual nail strips or rows are displaceable laterally for alignment with the outlet channel against the stop surface despite the guide grooves, provision can be made to move the corresponding contact edges of the guide grooves out of engagement with the adjacent nail heads or nail tips, so that the advancement the respective nail strips or rows inevitably takes place by means of spring force.

In an alternative embodiment of the inventive concept, it can also be provided that the magazine with the guide grooves as a whole or a part having the guide grooves relative to the fixed magazine perpendicular to the plane of the guide strips or rows in the direction of the stop surface, e.g. by spring bias.

After the first nail strip or the first row of nails has been used up, the entire magazine or the entire part having the guide grooves moves inevitably towards the stop surface by a distance which corresponds to the lateral spacing of the guide grooves, so that the next nail strip in each case or the next row of nails comes into contact with the stop surface.

In this embodiment, the laterally displaceable magazine can, for example, overlap a guide rail running in the longitudinal direction of the magazine with a lateral projection or be guided in its lateral displacement in some other way.

The feed cylinder can be mounted in a longitudinally displaceable manner in the guide rail.

The fixed guide rail can also form the stop surface for the nails.

Instead of supporting the delivery cylinder on a helical spring arranged in a front cylinder space, the delivery cylinder can also be supported with its rear end against a compression spring in the direction of the rear end of the guide rod.

In this embodiment, the guide rod is advantageously mounted displaceably in its longitudinal direction on the device body and can be moved with the feed cylinder from a front working position into a rear release position. Here, the guide rod can be supported at its rear end by a compression spring, so that it is forced into the front working position again after the movement has taken place. In this case, a pull hook is attached directly or indirectly to the feed cylinder, which grips the nail located in the drive channel. When the guide rod is moved with the feed cylinder in the direction of the rear box magazine end, the nail strip, including the nail already in the expulsion channel, is thereby withdrawn, so that this nail strip can be easily removed from the box magazine again.

The pulling hook in the retracted position expediently locks a trigger securing nose provided on the mouthpiece, sc that in this case, ie when the nail strip is pulled out, the device cannot be triggered.

A structurally simple configuration of the device according to the invention is obtained when the laterally displaceable magazine is guided on a guide column running transversely to the nail strip planes and is pressed in the direction of the stop surface by a compression spring arranged on the guide column. In this way, the next nail strip inevitably gets the correct position in relation to the expulsion channel when the previous nail strip is used up.

The laterally displaceable magazine can be locked against the action of the compression spring in its initial position, in which the nail strips or rows can be inserted into the magazine, so that easy reloading is possible, and the magazine cannot be locked against the action of the compression spring in this loading position must be held by hand.

The magazine itself or the part having the guide grooves can be held interchangeably on the device body. This opens up the possibility of attaching an already filled magazine or an already filled groove plate to the device in succession.

The part having the guide grooves can be designed as a plate-shaped packaging profile which can be inserted into the magazine. In this way, a particularly simple reloading is possible.

The plate-shaped packaging profile can be designed, for example, as a one-piece plastic profile. This allows simple manufacture and at the same time the advantage that the nails can slide easily in the guide grooves in the direction of the expulsion channel.

The guide grooves are preferably T-shaped in cross-section, the nail head being accommodated in the crossbar of the T and the part of the nail shaft directly adjoining the nail head in the subsequent leg of the T, so that the respective nail is largely secured against lateral pivoting.

On the device according to the invention, an unlockable latching pawl engaging behind the rear end of the packaging element can also be provided, with which an unwanted slipping out of the packaging profile from the box magazine can be prevented.

The invention also relates to a nail magazine unit with a holding element, which carries a number of nails arranged in at least one row, for being received in a magazine of a nail driving device, in particular a nail driving device of the type described above.

A nail magazine unit is known in the form of a so-called nail strip (cf. DE-OS 27 50 562), in which a number of staggered nails are either embedded in at least one plastic material strip or held together by paper strips or wires glued on from the side.

Quite endless nail strips are partially wound up as a coil storage unit. The handling eleintreibgeraten of Na ^g, which are to be equipped with derartien Nagelcolls, however, is unsatisfactory. Nail inserting devices that work with comparatively shorter straight, i.e. not wound-up nail strips require reloading with the individual nail strips, which can be labor-intensive, especially if the nail inserting device is equipped with a box magazine for holding several nail strips side by side.

The object of the present invention is therefore to create a nail magazine unit which can have a nail capacity of known nail coils, but can be used in nail driving tools with a box magazine.

This object is achieved in that the holding element is plate-shaped with two or more open grooves on one side of the plate for receiving two or more rows of nails side by side.

Such a nail magazine unit can be inserted as a whole into a box magazine of a nail driving device. After all the nails have been used up, the empty holding element is removed from the magazine and replaced with a previously or meanwhile filled nail magazine unit according to the invention. In this way, a complete reloading of the box magazine of a nail driving device of considerable capacity is possible in a few simple steps.

The nails are preferably longitudinally displaceably received in the grooves, so that they can be carried in the magazine of the nail driving device in a simple manner by guide pawls along the grooves in the direction of the drive-out channel of the mouthpiece of the nail driving device. The nails are expediently received with their heads in the grooves, since this ensures that the nails are held securely in the holding element.

In a special embodiment of the inventive concept, the grooves are T-shaped in cross section. In these T-shaped grooves, the nails can easily be inserted laterally with their nail heads and can only be torn out of such a groove in the axial direction of the nail with relatively great effort. While the crossbar of the T-slot takes up the nail head itself, the part of the nail shaft directly adjacent to the nail head is securely guided in the leg of the T-slot, which is open to the outside, against excessive lateral angular deflection of the nail.

The grooves preferably run parallel to one another, so that the individual rows of nails can be pushed out of the holding element in the same direction.

For holding the nail magazine unit in a box magazine of a nail driving device, the holding element preferably has a substantially rectangular, possibly slightly conical shape in plan view.

The holding element is preferably designed as a one-piece plastic profile. This not only facilitates the manufacture, but also a favorable guidance of the nails in the grooves.

The ends of the grooves can be separated, for example torn open or cut, closed. As long as they are closed, the holding element serves as packaging for the entire nail field consisting of individual rows. Before inserting the nail magazine unit into the box In the magazine of a nail driving device, the front of the grooves is opened by tearing or cutting open, while the back can remain closed so that no nails can fall out.

According to a development of the invention, the holding element has at least one cutout for the engagement of a locking pawl of the nail driving device. Such a locking pawl can thus easily prevent the nail magazine unit from accidentally falling out of the box magazine of the nail driving device.

It is not necessary for the holding element to be filled with individual non-magazine nails to form the nail magazine unit. Prefabricated nail strips of a known type can also be inserted into the individual grooves. This is particularly advantageous if the plate-shaped holding element inserted into the nail driving device is to be fully or partially reloaded.

It can further be provided that the holding element has elongated material weakening lines which run parallel to the grooves and which allow easy separation of a larger nail magazine unit into smaller subunits. In this way, it can be adapted to the special requirements of a nailing process or to the width of a given box magazine. Likewise, lines of weakness across the grooves are possible in the holding element, so that subunits with more or less long rows of nails can be produced from a given nail magazine unit. The division into subunits, especially if the holding element is made of plastic, by cutting or Make ripping. It is also conceivable for two or more nail magazine units of the type according to the invention to be combined into larger units by plugging them together. For this purpose, suitable corresponding latching means can be provided on the edges of the holding element.

Further objectives, features, advantages and possible uses of the present invention result from the following description of exemplary embodiments with reference to the attached drawing. All of the described and / or illustrated features, alone or in any meaningful combination, form the subject matter of the present invention, regardless of how they are summarized in the claims or their relationship.

• Fig. 1 in Seitenansicht teilweise weggebrochen eine erste Ausführungsform eines die Erfindung aufweisenden Nageleintreibgerätes,
• Fig. 2 das Gerät gemäß Fig. 1 teilweise geschnitten,
• Fig. 3 einen Schnitt gemäß III-III von Fig. 2 durch das die Erfindung aufweisende Kastenmagazin,
• Fig. 4a bis 4c eine Draufsicht gemäß IV-IV von Fig. 1 und 2 auf das hintere Ende des die Erfindung aufweisenden Kastenmagazins, in welches nacheinander bis zur vollständigen Füllung einzelne Nagelstreifen eingeschoben werden,
• Fig. 5 eine Darstellung entsprechend Fig. 4, wobei jedoch zu einer Packung zusammengefaßte Nagelstreifen von hinten in das Kastenmagazin einge schoben werden,
• Fig. 6 in Draufsicht eine Fördereinrichtung der Nagelstreifen bzw. -reihen aus der Sicht VI von Fig. 2,
• Fig. 7a und 7b einen Längsschnitt entsprechend der Schnittlinie VII-VII von Fig. 6 bei zwei unterschiedlichen Stellungen des Arbeitskolbens,
• Fig. 8 in Seitenansicht einen Nagelstreifen, der sich insbesondere für die Verarbeitung in einem erfindungsgemäßen Nageleintreibgerät nach der in den Fig. 1 bis 7 gezeigten Ausführungsbeispiel eignet,
• Fig. 9 eine Schnittdarstellung einer weiteren Ausgestaltung eines die Erfindung aufweisenden Nageleintreibgerätes entsprechend der Darstellung von Fig. 2,
• Fig. 10_a und eine Darstellung entsprechend derjenigen von _Fig. 10b Fig. 9, wobei jedoch im Bereich des Kastenmagazins sowohl der Nagelstreifen weggelassen als auch Teile weggebrochen sind, um die Fördereinrichtung für die Nagelstreifen besser sichtbar zu machen, bei zwei unterschiedlichen Stellungen des Arbeitskolbens,
• Fig. 11 eine Schnittdarstellung entsrpechen XI-XI von Fi^g. 10, wobei die einzelnen Nagelstreifen jedoch mit den Nagelköpfen der Nägel in Führungsnuten einer Führungsplatte verschieblich aufgenommen sind,
• Fig. 12 eine Seitenansicht eines Nagelstreifens mit seitlichem Papierverbindungsband, der sich für die Verarbeitung bei einem erfindungsgemäßen Gerät gemäß Fig. 9 bis 11, also einem solchen mit Führungsnuten, eignet,
• Fig. 13 eine Schrägansicht einer Nagelverpackungseinheit, welche mehrere Nagelreihen nebeneinander in Führungsnuten einer Halteplatte magaziniert enthält, die als solche insgesamt in ein Kastenmagazin des erfindungsgemäßen Gerätes nach der Ausführungsform gemäß den Fig. 9 bis 11 einschiebbar ist, und
• Fig. 14 in Schrägansicht eine die Erfindung aufweisende Nagelmagazinierungseinheit.

It shows:

• 1 partially broken away in side view a first embodiment of a nail driving device having the invention,
• 2 partially cut the device of FIG. 1,
• 3 shows a section according to III-III of FIG. 2 through the box magazine having the invention,
• 4a to 4c a top view according to IV-IV of FIGS. 1 and 2 of the rear end of the box magazine having the invention, into which individual nail strips are inserted one after the other until completely filled,
• 5 shows a representation corresponding to FIG. 4, but with nail strips combined into a pack being pushed into the box magazine from behind,
• 6 is a top view of a conveyor device for the nail strips or rows from the view VI of FIG. 2,
• 7a and 7b a longitudinal section along the section line VII-VII of Fig. 6 with two different positions of the working piston,
• 8 is a side view of a nail strip that is particularly suitable for processing in a nail driving device according to the invention according to the embodiment shown in FIGS. 1 to 7,
• 9 shows a sectional illustration of a further embodiment of a nail driving device according to the invention corresponding to the illustration of FIG. 2,
• Fig. 10 _a and a representation corresponding to that of IG _F. 10b, FIG. 9, but in the area of the box magazine both the nail strips have been omitted and parts have been broken away in order to make the conveyor device more visible to the nail strips, in two different positions of the working piston,
• Fig. 11 is a sectional view corresponding to XI-XI of Fi ^g. 10, the individual nail strips, however, being slidably received with the nail heads of the nails in guide grooves of a guide plate,
• 12 shows a side view of a nail strip with a paper connection band on the side, which is suitable for processing in a device according to the invention according to FIGS. 9 to 11, that is to say one with guide grooves,
• 13 is an oblique view of a nail packaging unit which contains several rows of nails in a magazine in guide grooves of a holding plate, which as a whole can be inserted as such into a box magazine of the device according to the embodiment according to FIGS. 9 to 11, and
• 14 shows an oblique view of a nail magazine unit having the invention.

The embodiment of the nail driving device 1 according to FIGS. 1 to 7 is particularly suitable for nail strips 3 according to FIG. 8, in which a number of nails 4 are connected to one another with the aid of a comparatively thick plastic material strip 66 according to DE-OS 27 50 562. The thickness of the plastic material strips 66 is usually such that the adjacent nail strips 3 are supported on one another and can slide longitudinally displaceably against one another without the nail heads becoming caught.

The nail driving device 1 according to F _l g. 1 to 7 has a device body 9 with a mouthpiece 35 to be directed towards the workpiece and a laterally protruding handle 37 with a manual release button 38, which, however, can only come into operation when a trigger securing lug 36 which is displaceably mounted on the mouthpiece 35 by placing the device 1 on it Workpiece has been pushed back. If the manual release button 38 is then actuated, a working piston 19 with an upper, further piston flange 57 and a lower, narrower piston flange 58 is pneumatically pressed from its retracted position into an advanced position. The working piston 19 has on its end face a driver blade 22 which opens into an expulsion channel 6 with its front tip and drives a nail 4 there, which is in the ready position, out of the mouthpiece 35 and into the adjacent workpiece. A box-shaped magazine 2 is fastened between the mouthpiece 35 and the handle 37 in accordance with the staggering of the nails 4 of the nail strips 3 to be received by the magazine 2. From the magazine 2, the next nail 4 of a nail strip 3 can be pressed into the ready channel 6 via a side inlet channel 5 into the expulsion channel 6. The magazine 2 has a width such that a plurality of nail strips 3 can find space in it side by side. The magazine 2 has a floor 11 which can be raised and lowered by a scissor mechanism 39, which can be changed and locked in height by means of a thumb screw 40, the axis 41 of which can be moved along a slot 42 in the side wall of the magazine 2, so that the Floor 11 is adjustable to the respective length of the nails 4 to be processed. Furthermore, the magazine 2 has at its rear loading end L (see FIGS. 4 and 5) a flap 43 which can be opened against the action of a spring 44 and is used to insert nail strips or rows 3 which are unintentional Prevents the nail strips or rows 3 from falling out of the magazine 2. The inner surface of the right-hand side wall 8 of the magazine 2, as seen by the user, is arranged such that it is aligned as a contact surface with the inlet channel 5 of the expulsion channel 6 of the mouthpiece 35. The left side wall of the magazine 2, as seen by the user, is provided with a plurality of leaf springs 7, which are designed so that their direction of force runs towards the right side wall 8, so that a force is always exerted on the nail strips or rows 3 inserted into the magazine 2 , which shifts it to the right side wall 8. The right side wall 8 has an opening 46 extending in the longitudinal direction of the magazine 2, through which one or more feed pawls 12 reach and can engage between the nail shafts of the nail strip 3 pressed directly onto the right side wall 8. The conveying pawls 12 are arranged so as to be pivotable about an axis 47 such that they deflect elastically from the path of movement of the nail strip or the row of nails 3 when a force acts from the loading side of the magazine 2 against the action of a spring 48, while they move in when a force is applied Opposite direction, ie remain locked in a projecting manner in the event of a push on a nail shaft in the direction of the expulsion channel 6. A limiting pin 49 serves as a counter bearing for the action of the force of the spring 48. The conveyor pawls 12 are fastened via the axis 47 to a conveyor cylinder 13 which can be displaced on the guide rod 14 outside the right side wall 8 parallel to the magazine 2. The feed cylinder 13 is secured against rotation about its axis by an angle profile 50. The guide rod 14 is screwed with its rear end to the magazine 2 by means of an angle profile 51, while it is inserted at its front end in a bearing piece 52 on the mouthpiece 35. In a front cylinder connected to the outside air space 16, a coil spring 15 is arranged around the guide rod 14. It is supported at its front end on an inner shoulder 17 of the feed cylinder 13 and with its rear end on a circumferential shoulder 18 of the guide rod 14. The spiral spring 15 thus presses the feed cylinder 13 in a non-ventilated state into a front end position. A rear cylinder space 21 of the feed cylinder 13 is sealed against the guide rod 14 and connected via a bore 20 of the guide rod 14 and a bore 53 of the bearing piece 52 to an air line 54 which opens into the lower space of the working cylinder 55, which follows above a row of bores 59 is sealed outside by means of seal 70. If the nail driving device 1 is connected to a compressed air source, the space between the upper and lower piston flange 57, 58 of the working cylinder 19 is also filled with compressed air. If a driving-in process is triggered by actuating the manual release button 38 and the release securing nose 36, the main valve 56 opens and the working piston 19 is driven downward by the compressed air entering the working cylinder 55 (FIG. 7a). As a result, the foremost nail 4 in the ready position in the drive-out channel 6 is driven into a workpiece. The lower piston flange 58 of the working piston 19 exceeds the row of bores 59 located in the lower working cylinder area, so that the compressed air which has penetrated between the upper and lower piston flanges 57, 58 of the working piston 19 via an opening 71 via an outer chamber 72, the air line 54 and the bores 53 and 20 enters the rear cylinder chamber 21 and the delivery cylinder 13 is moved parallel to the longitudinal direction of the magazine 2 to the rear. A locking pawl 23 on the mouthpiece 35 (cf. FIG. 6) prevents the nail strip 3 resting against the side wall 8, as does the backward movement of the conveyor pawl 12 to move back. The pawl 23 is pressed with a locking tooth 60 by springs 61 into a space between two adjacent nail shafts. The pawl 23 is pivotally mounted about a magazine-fixed axis 63. Against the action of the springs 61, the detent tooth 60 can be brought out of engagement with the nail strip 3 by hand by means of an unlocking pin 62, so that it is pulled out of the magazine 2 to the rear can. After the return movement of the conveying cylinder 13 under the effect of the air pressure against the force of the spring 15, the conveying pawl 12 engages at the end of the working stroke between two nail shafts of the nail strip 3 lying against the side wall 8. If, as a result of reversing the finger valve 64 and the main valve 56, the compressed air located above the working piston 19 is released to the outside, the working piston 19 returns to its upper end position (FIG. 7b). As a result, the compressed air accumulated in the rear cylinder chamber 21 will escape to the outside via the bore 20, the bore 53 and the air line 54, the outer chamber 72 and the row of bores 59, as shown in FIG. 7b, so that the feed cylinder 13 is under the action the compression spring 15 located in the front cylinder space 16 is shifted forward, which also transports the nail strip 3 forward via the feed pawl 12 and automatically brings a new nail 4 into the ready position of the expulsion channel 6. This process is repeated until the entire nail strip 3, which rests on the side wall 8 of the box magazine 2, has left the magazine area in the direction of the mouthpiece 35, whereupon under the pressure of the leaf springs 7 attached to the left side wall 45 of the magazine 2, the following one Nail strip 3 is pushed towards the right side wall 8 of the magazine 2 so that it engages the feed pawl 12 located on the feed cylinder 13. Because the Ar bci tshub of the delivery cylinder 13 covers at least twice the distance between the two nails 4 in the nail strip 3, the previous remaining nail strip 3, which is already outside the box magazine 2 and is on the way to the expulsion channel 6, is overtaken by the subsequent nail strip 3, so that there is a continuous nailing until the magazine 2 is completely emptied or is reloaded during the work at the discretion of the user. This is a particular advantage of the nail driving device 1 according to the invention.

9 to 11 illustrate another embodiment of a nail driving device 1 having the invention, which is intended in particular for processing nail strips 3 according to FIG. 12 or nail arrangements according to FIG. 13. The nail strip 3 according to FIG. 12 differs from that shown in FIG. 8 in particular in that, due to a modification of the nail head 24, the nails 4 are connected in a staggered manner directly to one another with a side adhesive tape 65, while the nails 4 according to FIG. 8 in one comparatively thick plastic connecting material strips 66, which holds the adjacent nail strips 3 in the magazine 2 at a sufficient distance so that they cannot get caught in one another in the event of a relative displacement. However, this would be possible with nail strips 3 according to FIG. 12, since the nail heads 24 protrude comparatively far beyond the outer surfaces of the adhesive tapes 65. 8 can be guided with the nail tips 10 on the height-adjustable base 11 of the fixed magazine 2, in the embodiment illustrated in FIGS. 9 to 11 the nails 4 are guided with the nail heads 24 in guide grooves 25 Distance provided. Since the nail shafts lie close together here, a feed pawl 12 cannot intervene in a space. It is therefore provided that the last nail 4 of a nail strip 3 is gripped by a feed pawl 12 and the nail strip 3 is thereby fed to the mouthpiece 35. On the feed cylinder 13, a slide 67 facing the inside of the magazine is attached, which forms a stop surface 80 and from which a plurality of feed pawls 12 protrude spaced over the length of the magazine 2, so that a feed pawl 12 or a pair of feed pawls 12 always during transport reaches behind the last nail 4 of a nail strip 3. For this purpose, the working stroke of the conveying cylinder 13 is at least one nail strength greater than the distance from the conveying pawl 12 to the conveying pawl 12 in the longitudinal direction of the magazine.

9 to 11 operates similarly to that described with reference to FIGS. 1 to 7 with a working cylinder 55, a main control valve 56, a finger valve 64, a working piston 19 and a driver blade 22 fastened to it, which in the expulsion channel 6 is guided, in each of which a nail 4 is kept ready to be driven into a workpiece when triggered. The magazine 2 is also box-shaped but in this case is held transversely displaceably on a guide rail 28 running in the longitudinal direction of the magazine 2 with a lateral projection 29. The guide rail 28 is fastened on the front to the mouthpiece 35 and on the rear on the handle 37 of the device body 9. The feed cylinder 13 is slidably mounted in the guide rail 28 and carries on its side facing the magazine interior the slide 67 forming the stop surface 80 with the feed pawls 12 arranged in pairs. As in the first embodiment, the conveying pawls 12 are resiliently deflected under the action of a force in the conveying direction, while at The action of a force in the direction of the rear end of the magazine 2 in the interior of the magazine 2 remains locked and protruding. The delivery cylinder 13 is in turn slidably mounted on a piston rod 14 along the magazine 2, which leads through the delivery cylinder 13. The front part of the guide rod 14 is accommodated in a longitudinally displaceable manner in a fitting part fastened to the guide rail 28. Center bore 20, bore 53, air line 54 connect the outer chamber 72 for the piston return of the working cylinder 55 according to FIGS. 7a, 7b also with a cylinder space 21 for displacing the feed cylinder 13 against the action of the spiral spring 15 'against which the feed cylinder 13 rests on it supports rear end and which rests with its opposite end on an angle piece 68, in which the guide rod 14 is slidably mounted. The guide rod 14 has behind the angle piece 68, which is fastened to the guide rail 28, a projection 69, which is designed as a spring bearing on which a compression spring 30 is seated, which presses the guide rod 14 in the conveying direction. The compression spring 15, on the other hand, presses the delivery piston 13 into its front end position in the non-ventilated state. If the main valve 56 is opened by actuation of the finger valve 64, the working piston 19 is driven downward by the air flowing into the working cylinder 55 at the top, so that the nail 4 located in the driving channel 6 is driven into a workpiece (FIG. ). The working piston 19 shortly before the lower end position exceeds a row of holes 59 in the working cylinder 55, so that compressed air located above the working piston 19 can reach the storage chamber for the return stroke of the working piston 19 via an O-ring acting as a check valve. As a result, compressed air also enters the cylinder chamber 21 of the delivery cylinder 13 in the way already described above, so that the delivery cylinder 13 and the associated movable slide 67 are driven with the feed pawls 12 against the action of the compression spring 15 'in the rear position. The nails 4 located in the magazine 2 are held in place due to a pressure to be explained on the stop surface 80 so that the feed pawls 12 cannot move the nail strip 3 backwards. If the movable slide 67 with the feed pawls 12 has reached the rear end position, a pair of pawls 12 engages behind the last nail 4 in that the path of the feed cylinder 13 is at least one nail strength longer than the distance from the feed pawl 12 to the feed pawl 12 in the longitudinal direction of the magazine. When the device is reversed, the working piston 19 is displaced into the upper end position by the air located below it and penetrating from the storage space for the return stroke into the working cylinder 55. When the working piston 19 has reached the upper end position, the air pressure underneath is also reduced, so that the air in the feed cylinder 13 can also escape. As a result, the feed cylinder 13 and the slider 67 attached to it are moved with the feed pawls 12 under the pressure of the compression spring 15 'in the direction of the mouthpiece 35, with the result that the next front nail 4 of the nail strip 3 is also moved into the expulsion channel 6. The magazine box 2, which is preferably made of extruded aluminum, is mounted so that it can be displaced transversely on a guide column which is fixedly arranged in relation to the device body 9. A magazine spring 2 ′ arranged on the guide column 32 pushes the magazine box 2 towards the guide rail 28 on the right-hand side as seen by the user. In an upper enlarged area of the magazine box 2, a profile part 26 with guide grooves 25 open downwards is inserted between the inner surface of the cover of the magazine box 2 and the upper edge of the guide rail 28. The lead Rungsnuten 25 of the plate-shaped profile part 26 are T-shaped in cross section for receiving nail strips or rows 3 with the nail heads 24. The profile part 26 is preferably made of plastic so that the nail heads 24 slide easily in the guide grooves 25 and from the feed pawls 12 can be easily carried in the conveying direction. A catch 34 provided at the rear end of the magazine box 2 prevents the nail strip 3 or nails 4 of a row of nails or the profile part 26 from falling out of the magazine box 2 at the rear. With the aid of a locking mechanism (not shown), the magazine box 2 can also be fixed against the action of the compression spring 27 in the starting position on the left as viewed by the user. In this position, the user has the option of loading the T-shaped guide grooves 25 with nail strips 3, in the illustrated case with four nail strips 3. After releasing the locking mechanism, the first nail strip 3 facing the slider 67 is grasped behind by the conveyor pawls 12 and, when the device is actuated, is gradually fed to the expulsion channel 6. After the first nail strip 3 has been used up, the magazine box 2 is automatically fed further to the right onto the movable slide 67 and the next nail strip 3 is gripped by the feed pawls 12. If the magazine 2 is to be reloaded, the movable slide 67 can be pulled back with the aid of a handle bolt 33 fastened to the rear end with the guide rod 14 against the action of the spring 30 until a pull hook 31 fastened to the front end of the slide 67 is moved backwards, which includes the nail 4 already in the expulsion channel 6 and pulls it back into the magazine 2. The magazine 2 can thus be shifted to the left in the manner already described, as a result of which the T-shaped guide grooves 25 which have already become free can be loaded again with nail strips 3. After this Unlocking the magazine box 2 from this loading position, the work can be continued. A constant reloading of the magazine 2 is also possible here in a simple manner.

Instead of inserting individual nail strips 3 into the profile part 26 located in the magazine 2 from the rear, a profile part 26 which is already completely filled with nails 4 according to FIG. 13 can be exchanged for an empty profile part 26 of the magazine 2. In this case, the independent profile part 26 according to FIG. 13 does not have nail strips, but rather nail rows 3, the nails 4 of which need not be connected to one another in the longitudinal direction. The profile part 26 with the pre-stored nails 4 thus represents a new type of nail packaging unit which allows a magazine 2 to be loaded quickly and completely both with nail strips 3 and with a field of individual nails 4. A special filling device can be provided for filling the profile part 26 with unmagazineized nails 4, which can run while the nail driving device 1 according to the invention is used. The profile part 26 has a nail holding capacity which corresponds approximately to the capacity of the nail strip pack P from FIG. 5 and completely fills the interior of the box magazine 2.

The nail magazine unit 81 according to FIG. 14 for nails 82 has an essentially rectangular, plate-shaped holding element 83 made of plastic. It has on its underside several, in the illustrated case four, grooves 84 which run parallel to one another and have a T-shaped cross section. The nails 82 are received in rows with their heads 85 in the grooves 84. Such a unit consisting of holding element 83 and nails 82 arranged in the manner of a matrix is simple, suitable for quick and complete filling of a box-shaped magazine of a nail driving device. The ends of the grooves 84 can be closed on both sides during the manufacture of the packaging unit, so that the nails 82 cannot fall out. Shortly before the nail magazine unit 81 is inserted into a box magazine of a nail driving device, the front side of the grooves 84 can then be torn open or cut open. This is possible in particular if the closure has been carried out with the aid of an adhesive strip or with the aid of a thin plastic wall formed in one piece with the holding element 83. At the rear end, the plate-shaped holding element 83 has a plurality of cutouts 86 for the engagement of a locking pawl of the nail driving device in order to prevent it from falling out of the box magazine unintentionally. As shown with dashed lines, the holding element 83 can furthermore have longitudinal and / or transverse material weakening lines 87, 87 ', along which the nail magazine unit 81 can be divided into smaller sub-units if required.

The holding element 83 is evidently not only suitable for receiving individual non-magazine nails 82, but also for receiving pre-magazine nail strips in the form of strips, which is indicated on the rightmost row of nails in the drawing by a connecting strip 88 shown in broken lines .

Such a nail magazine unit 81 can be used in such a way that it is reloaded after all the nails it has consumed have been used, either with prefabricated nail strips or with individual non-magazine nails.

Reference symbol list:

• 1 nail driver
• 2 magazine
• 3 nail strips or rows
• 4 nails
• 5 inlet duct
• 6 expulsion channel
• 7 spring
• 8 side wall
• 9 device body
• 10 nail tips
• 11 floor
• 12 conveyor pawl
• 13 delivery cylinders
• 14 guide rod
• 15 spring
• 16 cylinder space
• 17 inner shoulder
• 18 circumferential shoulder
• 19 working pistons
• 20 hole
• 21 cylinder space
• 22 Driver sheet
• 23 pawl
• 24 nail heads
• 25 guide grooves
• 26 profile part
• 27 spring
• 28 guide rail
• 29 cantilever
• 30 compression spring
• 31 draw hooks
• 32 guide pillar
• 33 grip bolts
• 34 pawl
• 35 mouthpiece
• 36 release lock nose
• 37 handle
• 38 manual release button
• 39 screw mechanism
• 40 thumbscrew
• 41 axis
• 42 slots
• 43 flap
• 44 spring
• 45 side wall
• 46 breakthrough
• 47 axis
• 48 spring
• 49 Limiting pin
• 50 angle profile
• 51 angle profile
• 52 stock
• 53 hole
• 54 air line
• 55 working cylinders
• 56 main valve
• 57 piston flange
• 58 piston flange
• 59 row of holes
• 60 locking tooth
• 61 spring
• 62 release pin
• 63 axis
• 64 finger valve
• 65 adhesive tape
• 66 connecting strips
• 67 slider
• 68 elbow
• 69 cantilever
• 70 seal
• 71 opening
• 72 outer chamber
• 73
• 74
• 75
• 76
• 77
• 78
• 79
• 80 stop surface
• 81 nail magazine unit
• 82 nails
• 83 holding element
• 84 grooves
• 86 recess
• 87 material weakening line
• 87 'weakening line
• 88 connecting strips

Claims (29)

1.Nail driving device with a magazine for nails combined into straight strips or rows, which nails successively from the front end of a slant, possibly corresponding to a staggering of the nails, via a lateral inlet channel leading into an expulsion channel into a ready position for e.g. Pneumatic expulsion can be pressed out of the expulsion channel, characterized in that the magazine (2) is designed as a box magazine of a width for accommodating two or more nail strips or rows (3) next to one another and in that the nail strips or rows (3) successively perpendicular to one another the levels of the nail strips or rows (3) in alignment with the inlet channel (5) of the expulsion channel (6) can be pressed. 2. Apparatus according to claim 1, characterized in that the nail strips or rows (3), e.g. by means of at least one spring (7), are pressed in the direction of a fixed stop surface (8) which is aligned with the inlet duct (5) of the expulsion duct (6). 3. Device according to claim 1 or 2, characterized in that the magazine (2) on the device body (9) is fixedly attached and the stop surface (8) is formed by a side wall of the magazine (2). 4. Device according to one of claims 1 to 3, characterized in that the nails (4) with their tips (10) on the preferably height-adjustable bottom (11) of the fixed magazine (2) are guided adjacent. 5. Device according to one of claims 1 to 4, characterized in that on the stop surface (8) projects in the direction of the magazine interior at least one feed pawl (12) which engage between the individual nails (4) or the last nail (4) engages behind one or one of the nail strips or rows (3) pressed directly onto the stop surface (8), the at least one feed pawl (12) preferably elastically deflecting under a force acting on it from the loading side (L) of the magazine (2) , but remains protruding locked in the event of a force acting in the opposite direction. 6. Apparatus according to claim 5, characterized in that the at least one feed pawl (12) on one in the longitudinal direction of the magazine (2) outside the stop surface (8), e.g. pneumatically and / or by spring force, can be actuated, preferably secured against rotation about its axis and preferably mounted on a guide rod (14) which is displaceably mounted parallel to the magazine (2). 7. Apparatus according to claim 6, characterized in that the feed cylinder (13) can be biased by moving in the direction of the rear magazine end against the action of a spring (15), preferably the displacement of the feed cylinder (13) against the action of the spring (15th ) from the air pressure determined for driving out the nail (4) from a front to a rear end position. 8. Apparatus according to claim 6 or 7, characterized in that the feed cylinder (13) in a cylinder space (16) connected to the outside air has a helical spring (15) accommodated on the guide rod (14), which with its front end on an inner shoulder of the Delivery cylinder (13) and with its rear end on a circumferential shoulder of the guide rod (14). 9. Apparatus according to one of Claims 6 to 8, characterized in that the guide rod (14) has a bore (20) which can be acted upon by the actuating air pressure of the working piston (19) and which extends into a second sealed cylinder chamber (21) of the delivery cylinder (13). opens, the air pressure in the second cylinder space (21) preferably being built up while the foremost nail (4) is being driven out, and after the driver blade (22) driving out the nail (4) has been reset to its upper starting position, it is reduced again. 10. Device according to one of claims 6 to 9, characterized in that the working stroke of the feed cylinder (13) is at least twice as large as the distance between two nails (4) in the or the nail strip or row (3) or Working stroke of the feed cylinder (13) is at least one nail thickness greater than the distance from the feed pawl (12) to the feed pawl (12) in the longitudinal direction of the magazine. 11. Device according to one of claims 1 to 10, characterized by an unlockable pawl (23) for engaging behind a nail (4) of the or each of the abutment surface (8) adjacent nail strip or row (3). 12. Device according to one of claims 1 to 11, characterized in that the nail heads (24) or nail tips (10) of the nails (4) in two or more in the longitudinal direction of the magazine (2) extending guide grooves (25) are slidably received, which can each be aligned with the inlet duct (5) of the expulsion duct (6). 13. Apparatus according to claim 12, characterized in that the magazine (2) with the guide grooves (25) in total or a part (26) having the guide grooves (25) relative to the fixed magazine (2) perpendicular to the plane of the nail strips or -Rows (3) in the direction of the stop surface (8), for example can be displaced by means of pretensioning by a spring (27). 14. Apparatus according to claim 13, characterized in that the laterally displaceable magazine (2) overlaps in the longitudinal direction of the magazine (2) guide rail (28) with a lateral projection (29). 15. Apparatus according to claim 14, characterized in that the conveying cylinder (13) is mounted in a longitudinally displaceable manner in the guide rail (28) and is preferably supported in the direction of the rear end of the guide rod (14) against a compression spring (15 ') (Fig. 10) . 16. Device according to one of claims 6 to 15, characterized in that the guide rod (14) in its longitudinal direction on the device body (9) is mounted displaceably and with the feed cylinder (13) is movable from a front working position into a rear release position. 17. Device according to one of claims 6 to 16, characterized in that the guide rod (14) is supported with its rear end on a compression spring (30). 18. Device according to one of claims 6 to 17, characterized in that on the feed cylinder (13) is directly or indirectly attached to the in the expulsion channel (6) nail (4) encompassing pull hook (31), preferably the pull hook (31 ) in the retracted position locks a trigger securing nose (36) provided on the mouthpiece (35). 19. Device according to one of claims 13 to 18, characterized in that the laterally displaceable magazine (2) on a transverse to the nail strip planes guide column (32) and by a on the guide column (32) arranged compression spring (27 ') in Direction is pressed onto the stop surface (8), preferably the laterally displaceable magazine (2) in its starting position, in which the nail strips or rows (3) can be inserted into the magazine (2), against the action of the compression spring (27 ' ) can be locked. 20. Device according to one of claims 1 to 19, characterized in that the magazine (2) as a whole or the part (26) having the guide grooves (25) is replaceable on the device body (91), the part (26) having the guide grooves (25) preferably being designed as a plate-shaped packaging profile which can be pushed into the magazine (2), preferably as a one-piece plastic profile. 21. Device according to one of claims 12 to 20, characterized in that the guide grooves (25) are T-shaped in cross section. 22. Apparatus according to claim 20 or 21, characterized by an unlockable latch (34) engaging behind the rear end of the packaging profile (26). 23. Device according to one of claims 12 to 22, characterized in that the part (26) having the guide grooves (25), in particular the packaging profile (26), can be reloaded with unmagazine nails (4) or prefabricated nail strips (3), and both in its position in the device and removed. 24. nail magazine unit with a number of nails arranged in a row holding element for receiving in a magazine of a nail driving device, in particular a nail driving device according to one of claims 1 to 23, characterized in that the holding element (83) plate-shaped with two or more grooves (84) which are open on one side of the plate are designed to accommodate two or more rows of nails next to one another. 25. nail magazine unit according to claim 24, characterized in that the nails (82), preferably with their heads (85) in the grooves (84) are accommodated in a longitudinally displaceable manner. 26. Nail magazine unit according to claim 24 or 25, characterized in that the grooves (84) are T-shaped in cross section and preferably run essentially parallel to one another. 27. Nail magazine unit according to one of claims 24 to 26, characterized in that the holding element (83) is essentially rectangular and preferably in the form of a one-piece plastic profile. 28. Nail magazine unit according to one of claims 24 to 27, characterized in that the ends of the grooves (84) are separable, e.g. can be torn open or cut open. 29. Nail magazine unit according to one of claims 24 to 28, characterized in that the holding element (83) has at least one recess (86) for the engagement of a locking pawl of the nail driving device.

Images