EP1183430B1 - Device for screwing in fastening elements - Google Patents

Description

The invention relates to a device for screwing Fastening elements for fastening insulation material on flat and shed roofs

Devices of the type mentioned serve as possible rational fastening of roof sealing and insulation material on flat and Shed roofs and are in a wide variety of designs offered. Such a screwing device is from the German Publication DE 42 40 607 A1 known. This known device has a feed device for the fasteners, one lowerable screw unit and a holding device for the Fastening element, which takes this up before screwing it in and then releases. Pre-assembled, two-part fastening elements, in particular from holding part and screw existing, processed by a separating device in the magazine to separate one fastener from the fastener chain intervenes. After separation, the fastener becomes one Holding device supplied, in which it is captured by a screw unit and in the roof surface is driven. The isolation is due to the Aufund Downward movement of the screw unit from a locked position into one Release position offset.

The known device is complex, complicated and prone to failure, which is why rapid screwing is not possible. In particular, the transfer of a fastening element isolated from the magazine or from the other fastening means into the screwing position is not possible without problems. Often, the screw tip of the screw rod cannot engage in the fastener or immerse it properly.
A device with an equivalent separation, as is known from DE 42 40 607 A1, is described in European Patent EP 0 600 285 B1, in which, however, the holding device comprises a clamping device which is formed from support elements which are arranged in a horizontal Perform a closing and opening movement on the level. The fastening element is enclosed in the shaft area. Only after the screw of the fastener has cut into the roof surface, the supports release the fastener. The opening movement is caused by a movable angle with wedge surfaces.

This structure is prone to failure and tends to block, which in turn Assembly progress very negatively affected.

In the German patent specification 198 11 929 C1 a device is described with which these disadvantages are largely excluded.

If the flat roof has a slight slope, the fastener can be used tilt into a vertical position due to its heavier tip and are therefore not caught by the screw tip.

Another disadvantage of the known devices is their relative Immobility. By arranging the magazine, the screw unit and their lowering aids, the separation and the feeding devices these devices are not only heavy but also have one unfavorable size. The screw axis is relatively far from Device edge, so that work on the attic of the roof or in the Area of skylights with the known devices not possible at all are and must be worked by hand at these points.

In contrast, the present device is said to be considerably simpler built and improved device are provided that are not compatible with the Problems of the known devices is afflicted.

This object is achieved by a device with the features of Main claim solved.

The invention enables the fastener to be inclined Roof surfaces can be processed. Even if the device according to the invention in is in an oblique position, the fastener is coaxial with Screw rod and thus aligned with the screw axis. Thereby, that is activated by the lifting movement of the screwing unit Holding device also a clamp on the recorded Fastener exercises, the device can also on the other poorly accessible roof areas can be used without it Function would be restricted in any way. Even on inclined ones The fastening element becomes roof surfaces exactly in the screw-in axis aligned for installation.

In particular, the proposed row-shaped structure of the device allows a slim design, so that the device on almost all Roof stations is operational. This advantage is particularly due to this reached because the screw axis of the device is relative due to this small size is near the edge of the device and thus also Machined roof edge areas or edge zones in the area of skylights can be. In the device according to the invention, i.a. oval, round and collated plastic screw combinations can be processed.

The invention provides that a pliers-shaped in the holding device Gripper is arranged, the gripper movement by the lifting movement the tightening unit is triggered. Due to the ability of the holding device can exert a pliers movement on the fastener e.g. the phases of the clamping and release situations are individually manipulated become.

The invention further provides that the pincer-shaped gripper by the Shaft of the fastener enclosing between them Fork arms is formed on which the washer or Distribution plate of the plastic holder rests. Such a gripper is simple and yet functional in structure. With such a gripper a Variety different fasteners are included. Even if the selected gripper shape for a certain type of fastener would not be suitable, the gripper can against an individually adapted Grippers can be replaced quickly and easily.

A very special advantage is that the fork arms close the shaft of the Fastening element through a transverse to its longitudinal axis Include aligned pliers movement. This can be aligned that the gripper arms are not within the magazine's ejection path or the feed device. Thus, the holding device also carries contributes significantly to the narrow construction achieved. According to the invention also provided that each fork arm in a vertical plane aligned tax courage is led. This in turn means for the Size of the device that no adjusting or control means in the Swing out the horizontal and thus have no influence on the width of the device to have. According to the number of fork arms are on both sides of the Screw-in axis provided such control grooves. Thus, the Fork arms can be controlled independently but also synchronously.

Conveniently, each fork arm is parallel to its own one Longitudinal axis offset axis pivotable. Thus, the Fork arms carry the fastener sufficiently long and only then be swiveled out of the screw-in axis, e.g. if the Screw tip or a guide grommet secure the fastener has detected so that the fastening element breaks out of the Screw-in axis is no longer possible.

In a particularly preferred embodiment of the invention provided that the control grooves both in the area of top dead center as well as in the area of the bottom dead center from the screw-in axis lead away. This ensures that the holding device is first closes during the downward movement of the screwing unit, i.e. the Pliers movement only after a specified path of the screwing unit is activated and thus on the feeder and separation can be coordinated. This can be done by the magazine or the feeder Separating device coming fastener in a relative wide open holding device that can be thrown in screw-in closes, the fastening element is fixed and closed releases at a given time.

The fork arms are expediently at one with their pivot axes Arranged vertically movable centering block along the screw-in axis. This ensures a synchronous process with this, especially since Centering block at the free end of the screw rod of the screw unit surrounding lifting sleeve is arranged. This also ensures that possible lifting delays on the lifting sleeve not on the holding device can be transferred, the tax history through the Tightening unit activated indirectly but not directly manipulated.

The centering block is penetrated by the screw rod so far that the Screw insert the screw of the fastener functional can capture.

A particularly preferred embodiment of the invention provides that the holding device within one on the to be treated Roof surface attachable housing is arranged So that are themselves moving holder parts delimited from the user, so that if the device is used properly, there is a risk of an accident is largely excluded. But the case has another one Advantage that this practically serves as an attachment element for the assembly point. In addition to the handle, the housing is the widest part of the device protruding part and serves the device perpendicular to Roof underground and parallel to the roof edge, especially to the parapet align. For this purpose, the housing is on the bearing the control grooves Housing side at least partially open. So that's it unobstructed feeding of the fastener to the holding device ensured. The housing is also expediently on the floor at least partially open, so that none in the screw axis lying housing parts driving the fasteners into the Can interfere with the roof surface.

A particularly expedient embodiment of the invention provides that the magazine is rigid and at least partially open Housing side with its ejection end, directed towards the holding device, is arranged. The magazine is the opposite of swiveling magazines Device according to the invention in its presentation behavior cheaper. That the fasteners in the magazine are not Swiveling movements suspended by the magazine and remain relative evenly stored in the magazine, which is the subsequent separation much easier

A particularly preferred embodiment of the invention provides that the separating and feeding device near the holding device End of the magazine is arranged and from a horizontal and transverse to Magazine consists of linearly movable slide which has two pawls, caused by the lifting movement of the screw unit into the stacking level intervene in the magazine and present the fasteners, separate them and the fastener of each separated from the magazine stream Feed the holding device. This is the simplest possible, however most effectively created a separating device that on confined space comes into effect. The slide practically only moves on a path roughly equal to the shaft diameter of the Fastener corresponds. Since there are no device parts here either Swinging horizontally remains the radius of action of the slide on the Housing width or its length limited, so that the narrow Construction of the device is also preserved here.

Advantageously, the slide carries a pin which is within a vertical and linear, can be lowered together with the screw unit Control bar is guided. Especially through the linear movement of the Control bar are almost deviations of the slide movement locked out. Here too is the control bar with the centering block connected and coupled directly to its lifting movement. Stroke delays of the screwdriver unit are therefore not directly due to the Transfer control bar so that its control curve largely comes into effect independently.

Another preferred embodiment of the invention provides that the Screw unit on one along a vertical rail height-adjustable carriage is arranged. The carriage has the Rails enclosing rollers on both sides and supported on one parallel gas spring aligned with the lifting sleeve. By this arrangement the screwing unit does not require any additional guide means, which is the overall width and would only unnecessarily increase the length and weight of the device. The screw unit receives the guidance through its own lifting sleeve, which is the Ceiling of the case interspersed. The guidance of the slide on the rail does not allow lateral deflection.

The centering block belonging to the holding device limits the lifting sleeve its lower end. It is essentially cuboid in shape.

A particularly preferred embodiment of the invention provides that the centering block of the holding device is bell-shaped. Here, each configuration of the centering block, into which a plate is used Fastener can at least partially immerse. This is Particularly advantageous for oval support plates. Because of that The plate is immersed in the centering block before it is turned protected around the longitudinal axis of the fastener. The bell shape is at one achieved particularly preferred embodiment of the invention by a concave curvature on the underside of the centering block, e.g. is milled. The curvature is expediently designed in such a way that this of the curvature of the oval, curved support plate of a fastener equivalent.

If in addition, as in an advantageous development of the invention is provided on the long sides of the centering block edge strips are formed, which protrude beyond the curvature of the centering block centering safety is further improved. Twisting the fastener is then completely excluded, because the platter on the inside of the Edge strips strikes.

It makes sense to close the marginal ridges with an arcuate incision provided so that the holder is unobstructed when it is thrown into the gripper can slide.

In a further advantageous embodiment of the invention, that the centering block in the area of the screw-in axis of a grommet is penetrated, which protrudes beyond the sole of the arch. The spout dips during the downward stroke of the centering block into the lifting channel of a two-part Fastener and gives this a pre-alignment, the the screwdriver linkage follows. When using others Fastening elements push the sleeve back or remove it.

A further advantageous embodiment of the invention provides that the Fork arms of the gripper on their parallel adjacent walls, respectively have a step-shaped heel in the closed position of the gripper interlocking, with the fork arms in this area each have a keyway. Thereby, while enclosing the Fastener whose shaft securely in the neighboring, becoming a prism complementary keyways jammed. The shaft can neither against the Jaws can still be displaced across these. A special advantage is that the fastener is exactly in the Screw-in axis is aligned. This is particularly advantageous when working on roofs with a slight slope.

A further advantageous embodiment of the invention provides that the The fork arms of the gripper each consist of a jaw and one Hinge plate exist, the hinge plate orthogonal to the respective Jaw is arranged. For one, this brings the advantage of both Parts can be made from different materials. On the other hand the fork arm does not have to be completely worn or damaged be replaced.

A further advantageous embodiment of the invention provides that the Fork arms of the gripper on the back of their articulated brackets extend the longitudinal axis of the respective fork arm pin have, which is rotatable about the respective longitudinal axis. This eliminates almost every frictional force influencing the control and the device is easy to operate.

Another advantageous embodiment of the invention provides that Ejection end of the magazine from two largely Z-shaped fingers is formed, each having a slide directed against the gripper. This creates a transition zone in which the fastener automatically occurs after its isolation, even if the Device is tilted, as is usual on roofs with a slight slope.

A further advantageous embodiment of the invention provides that at least one of the fingers is arranged on the magazine in a foldable or pivotable manner. Since the Transfer area between magazine, separator and holding device see above must be dimensioned that the fastening element on the one hand can be transferred into the screw-in axis without hindrance and on the other hand, the scope in which the fastener does not move must be too large to avoid misfeed, is with the proposed measure provided a means by which if the device malfunctions, a holder that has already been submitted can be removed from the device. By swinging away the foldable finger becomes an access possibility to the holding device created from which the fastener can be quickly removed can. For this purpose, the swiveling or folding finger is expediently on a spring-loaded ball mounted in the magazine or in the Magazine wall is inserted. The ball exerts pressure on the finger so that it does not move out of its closed position automatically can move.

Another advantageous embodiment of the invention provides that the handle is at least foldable or pivotable. This is particularly so this is an advantage when working on the edge of the roof, close to the parapet. The stroke is cleared by folding or pivoting the handle. That the user can so close to the parapet with the device according to the invention Drive up without the handle hitting the parapet. The handle can be pivoted in so far that this during the downward stroke in sufficient distance past the parapet. Alternatively, a Handle e.g. be inserted into the adjacent handle. If necessary the connector disconnected.

Further advantages and advantageous embodiments of the invention are the following description, the drawing and the claims removable.

The drawing shows a particularly preferred embodiment of the Invention again.

Figur 1

eine Seitenansicht der gesamten Vorrichtung

Figur 2

eine Frontansicht der gesamten Vorrichtung aus der in Figur 1 angedeuteten Richtung II

Figur 3

eine Vergrößerung der Vorrichtung im Bereich des Gehäuses, ohne Magazin und ohne Zuführ- und Vereinzelung

Figur 4

einen Schnitt entlang der in Figur 3 angedeuteten Linie IV-IV

Figur 5

eine Draufsicht auf die Gehäusedecke ohne Aufbauten und ohne durch die Platte durchführenden Bauteile

Figur 6

eine perspektivische Darstellung der Vereinzelungs- und Zuführeinrichtung

Figur 7

eine vergrößerte Seitenansicht der Vorrichtung im Bereich der Vereinzelungs- und Zuführeinrichtung

Figur 8

eine Darstellung der Vorrichtung aus gleichem Blickwinkel wie in Fig. 7 jedoch ohne Magazin

Figur 9

eine perspektivische Darstellung des Magazins

Figur 10

eine Ansicht der rechten Magazinhälfte aus der in Fig. 9 angedeuteten Richtung X

Figur 11

eine Seitenansicht des Magazins aus der in Fig. 10 angedeuteten Richtung XI

Figur 12

das in Fig. 11 mit XII gekennzeichnete Detail in einer Vergrößerung

Figur 13

eine perspektivische Darstellung des geschlossenen Greifers

Figur 14

die demontierten Greiferteile in einer perspektivischen Darstellung

Figur 15

der linke Gabelarm des Greifers in einer Frontansicht

Figur 16

der linke Gabelarm des Greifers in einer Seitenansicht aus der in Figur 15 mit XVI gekennzeichneten Richtung

Figur 17

der linke Gabelarm des Greifers in einer Draufsicht

Figur 18

der linke Gabelarm des Greifers in einer Rückansicht

Figur 19

der linke Gabelarm des Greifers in einer Seitenansicht, aus der in Fig. 18 angedeuteten Richtung XIX

Figur 20

der rechte Gabelarm des Greifers in einer Frontansicht

Figur 21

der rechte Gabelarm des Greifers in einer Seitenansicht aus der Richtung XXI

Figur 22

der rechte Gabelarm des Greifers in einer Draufsicht

Figur 23

der rechte Gabelarm des Greifers in einer Seitenansicht, aus der in Fig. 24 angedeuteten Richtung XXIII

Figur 24

der rechte Gabelarm des Greifers in einer Rückansicht

Figur 25

eine perspektivische Darstellung des Zentrierblocks

Figur 26

eine Frontansicht des Zentrierblocks

Figur 27

eine Seitenansicht des Zentrierblocks

Figur 28

eine Draufsicht des Zentrierblocks

Figur 29

eine vergrößerte Ansicht des oberen Abschnitts der Vorrichtung

Figur 30

die Schiene mit Schlitten in einer Frontansicht

Figur 31

eine Seitenansicht der Schiene mit Schlitten

Figur 32

eine Draufsicht der Schiene mit Schlitten

Figur 33

ein in der Vorrichtung verarbeitbares Befestigungselement

Figur 34

den Griff in einer vergrößerten Darstellung

Show:

Figure 1

a side view of the entire device

Figure 2

a front view of the entire device from the direction indicated in Figure 1 II

Figure 3

an enlargement of the device in the area of the housing, without magazine and without feed and separation

Figure 4

a section along the line IV-IV indicated in Figure 3

Figure 5

a plan view of the housing cover without superstructures and without components passing through the plate

Figure 6

a perspective view of the separating and feeding device

Figure 7

an enlarged side view of the device in the area of the separating and feeding device

Figure 8

a representation of the device from the same perspective as in Fig. 7 but without the magazine

Figure 9

a perspective view of the magazine

Figure 10

a view of the right half of the magazine from the direction X indicated in Fig. 9

Figure 11

a side view of the magazine from the direction XI indicated in Fig. 10

Figure 12

the detail marked XII in Fig. 11 in an enlargement

Figure 13

a perspective view of the closed gripper

Figure 14

the disassembled gripper parts in a perspective view

Figure 15

the left fork arm of the gripper in a front view

Figure 16

the left fork arm of the gripper in a side view from the direction marked XVI in Figure 15

Figure 17

the left fork arm of the gripper in a top view

Figure 18

the left fork arm of the gripper in a rear view

Figure 19

the left fork arm of the gripper in a side view, from the direction XIX indicated in Fig. 18

Figure 20

the right fork arm of the gripper in a front view

Figure 21

the right fork arm of the gripper in a side view from the direction XXI

Figure 22

the right fork arm of the gripper in a top view

Figure 23

the right fork arm of the gripper in a side view, from the direction indicated in Fig. 24 XXIII

Figure 24

the right fork arm of the gripper in a rear view

Figure 25

a perspective view of the centering block

Figure 26

a front view of the centering block

Figure 27

a side view of the centering block

Figure 28

a top view of the centering block

Figure 29

an enlarged view of the upper portion of the device

Figure 30

the rail with slide in a front view

Figure 31

a side view of the rail with sled

Figure 32

a top view of the rail with sled

Figure 33

a fastener that can be processed in the device

Figure 34

the handle in an enlarged view

As can be seen in particular from Figures 1 and 2, the structure of the device designated in its entirety with 1 similar to that of one Stick. A screw unit 4 extends over a housing 2 Screw rod, not shown, of a multi-part, telescopically constructed lifting sleeve 6.7 is surrounded. The screw unit 4 is in the clamping jaws 56, 57 of a carriage designated as a whole by 51 clamped and movable with it in the vertical direction. This is done by applying a vertical downward pressure to the handle 53 is exercised. Here, a parallel to the screw-in axis 3 aligned rail 50 a linear guide on the slide 51st specified. The carriage 51 itself is supported on a gas pressure spring 52 from. Due to the up and down movement of the screw unit 4, in a magazine 35 arranged approximately parallel to the screw-in axis 3 upstream, approximately parallel to each other Fasteners 65 isolated. Here, through the lifting movement the screwing unit mechanically moves separating and feeding elements and thereby each a fastening element 65 from which one above the other jostling stream of upstream fasteners 65 from the Magazine 35 removed and into the desired screw-in position brought coaxially to the screw-in axis 3. There it is from Screwdriver linkage of the screwing unit 4 is captured and into the roof surface driven.

Before on the function of the device 1 and on the sequence of movements of all on the magazine, as well as the separation and screwing process The individual parts involved are discussed below Device parts described in detail.

With 2 the housing of the device 1 is designated. The housing 2 has the shape of an upright prism. The corner areas are from vertical columns 87,88,89,90 limited. To face 13, on its wall 20 near the magazine and towards the bottom 10 is the housing 2 formed open, wherein a cutout 91 is in the bottom 10, the is bounded by a peripheral support edge 14. The face 13 opposite side is closed with a housing wall 11. The side remote from the magazine is also with a housing wall 12 closed. In the housing wall 12 are two control grooves 16, 17 incorporated. In each of these control grooves 16, 17 there is a fork arm 18, 19 of a gripper 5, which for this purpose on its fork longitudinal axes 23, 24 in the control grooves 16,17 engaging pins 92,93. The top area the housing is completed with a housing cover 8. This Housing cover 8 is a rectangular plate with rounded corner areas. The housing cover 8 has one on one of its long plate flanks Incision 96 in which the magazine 35 with its rear bar 126 is attached. There are three cutouts inside the panel. The first, slot-shaped cutout 97 serves for the free passage of a control bar 36 (see e.g. Figure 4). Another panel cutout is at 28 designated circular cylindrical bore through which the lifting sleeve 6,7 (see e.g. Figure 4) is carried out. By the provided in the edge area The gas pressure spring 52 is passed through bore 208. In the 98 designated incision is the rail 50 (see e.g. Figure 3) partially added. Using the screws screwed into the corner areas 101-104 the housing ceiling with the columns 87 underneath, 88, 89 and 90 connected.

On the outside of the housing wall 11 is a bearing block 94 for the Recording a castor 67 attached, which is also on the Housing wall 11 extends fender 95 extends. On the inside the housing wall 11 is attached to a bearing plate 64 in which the Gas pressure spring 52 is received with its piston rod 63.

The housing wall 12 with the control grooves 16 and 17 is parallel to Screw-in axis 3 aligned. The control groove 17 is a mirror image Figure of the tax groove 16. It is a special feature that the Control curves 16, 17 each have one in addition to their linear sections 105, 106 have lower curve runout 83.85, as well as in the upper section each have a deflection 107, 108. Both the curves 83.85 and The deflections 107, 108 also lead away from the screw-in axis 3.

On the housing 2 is a designated 33 and 33 Feeder attached.

On the housing cover 8 are two approximately U-shaped Tabs 109,110 arranged. Both tabs 109, 110 have one Slit 111.112 that the respective tab from the front 113,115 to penetrated to the rear 114,116. The slots 111, 112 have one clear width, which is approximately the cross section of a slide 39 guided therein equivalent. The slider 39 is approximately C-shaped in cross section and thus has an orthogonal lying between two flanges 117, 118 Bridge 119 on. The web 119 is in the slots 111, 112 of the tabs 109, 110 movably received in the direction of the arrows "A" and "B". On its flanges 117, 118 extend orthogonally to these, in height offset to each other, a pawl 40, 41, the two free Ends 43,44 in approximately a line ends. The pawls 40, 41 extend horizontal approximately at right angles to the longitudinal axis of the magazine and reach into the Stacking level 42 of the magazine 35. The length of the pawls is 40.41 chosen so that between the free ends 43,44 and each opposite slide inner wall 45, 46 a receiving 47 or there is an ejection opening 48. There is one between the two openings 47, 48 Separation chamber 49 formed. The pawls 40, 41 are off Round material made and extend through circular cylindrical openings 122, 124 and 123, 125 in the vertical rods 120, 121 of magazine 35 Movement of the slide 39 to the left or right (direction A or B) of the Magazine 35 is guided by a pin 38 within the Control curve 37 of the control bar 36 causes when this together with the screw unit 4 moves down

With 35 the magazine is designated. The magazine 35 has essentially a cage-like shape and consists of two in the front area from each other spaced vertical bars 120, 121 and arranged parallel to each other a rear bar 126. The vertical bars 120, 121 and the rear Strip 126 are connected to one another by frame strips 127, 128. The rear bar 126 is with its lower section on the housing ceiling 8 attached. At around half the magazine height, magazine 35 is one Angle bar 129 attached to the front of the rail 50. At the top Section, the magazine 35 is closed with a clip 130. For this the vertical rod 120 of the magazine 35 has one at its free end Pin 131, which is encompassed by an incision 132 of the clasp 130. The Clip 130 is on the free end of the vertical bar 121 around it Longitudinal axis pivotally arranged. This allows the magazine 35 after the Filling with fasteners can be closed again. On Another special feature of magazine 35 is the design the discharge zone designated as a whole by 32. On every vertical bar 120, 121 is an approximately z-shaped finger 133, 134 attached in the direction of Screw-in axis 3 is bent. One of the fingers 133 shown is doing so with its upper vertical section 135 by two screws 136, 137 rigidly attached to the vertical rod 120 of the magazine 35. The however, adjacent finger 134 has 147 in its upper section only one fastening screw 138, with which it on the vertical rod 121 the axis "Y" is rotatably arranged. To the upper sections 135, 147 there is an inclined slide 148,149 towards the floor that opens the free ends 30, 31 of the gripper 5 into the interior 29 of the housing 2 (see e.g. Figure 4). The isolated and glide over them released fasteners on the gripper 5. So that the Do not move finger 134 automatically out of its closed position can, in the vertical rod 121 is a spring 139 under pressure Ball 140 inserted into one arranged on the inside of the finger 141 Indentation 142. By turning finger 134 about axis "Y" an access opening to the gripper 5 is created.

The gripper, designated 5, is essentially pliers-shaped Shape. It consists of two fork arms 18, 19. Both fork arms are 18, 19 approximately L-shaped and each have a jaw 143,144 and a hinge plate 145,146, through which the associated Pivot axis 26 or 27 runs. The joint plates 145,146 are with their pivot axes 26, 27 on the rear side 25 of the centering block 9 attached. The fork arms 18, 19 essentially have a wedge shape, an upwardly open stair landing 150 being formed in the fork arm 18 is. For this purpose, the fork arm 19 forms with a step 151 that is open at the bottom the counterpart so that both fork arms in the area of their heels 150,151 interlocking. The inside of the jaws 152, 153 143, 144 are each formed with a keyway 154, 155. On the The rear sides 156, 157 of the joint plates 145, 146 are each coaxial with the Fork longitudinal axes 23,24 arranged pins 92,93 are provided each in one of the associated control grooves 16 and 17 of the housing wall 12 of the housing 2 protrude (see e.g. Figures 1 and 3). The pegs 92.93 are freely rotatable around their axis. Both jaws 143, 144 have a sloping back 158,159 that slopes towards the floor. This is among others then advantageous if a fastening element 65 (see FIG. 33) used with a screw 84 inserted in a plastic holder 86 in which the support plate 80 is concavely curved The support plate 80 sits largely on the margins 160,161 of both Jaws 143, 144.

At a sufficient distance above the gripper 5 is at the lower end Hubs 6.7 a centering block 9 is arranged. The centering block 9 has a substantially cuboid shape and is on its underside 162 with one extending between the short faces 163, 164 concave curvature 165 formed, which is approximately the concave curvature of the Plates of a plastic holder corresponds. The long sides 166,167 stand as narrow edge strips 170, 171 over the curvature 165 over and are themselves provided with an arcuate incision 168,169. The protruding edge strips 170, 171 prevent a here with twist the oval plastic holder on its support plate can. With 172 a circular cylindrical depression is designated, in which the Plunging the lifting sleeve 7 and screwed into the holes 173, 174 Screws from the bottom of the centering block. In the in The center of the cylindrical depression provided step bed 175 is one Spout 176 used, with its collar-shaped collar 177 on the Paragraph 178 of the step bed 175 supports. The tulle tip 179 protrudes above the Sole 180 of concave curvature 165 beyond. In the back Threaded bores 181, 182 are the joint plates 145, 146 of the Screwed in gripper 5. Thus, these screw points form the Swivel axes 26, 27 of the fork arms 18, 19. In the front of the Centering blocks 9, two further threaded bores 183, 184 are arranged, to which the control bar 36 is fastened with the screws 191, 192.

With 36 the control bar is designated. In this the pin 38 of the Slide 39 of the separating and feeding device 33. The Control bar 36 moves without slip at least in one section synchronously in the vertical direction with the screw unit 4. Here, a Adjustment movement derived for the separation by the pin 38th is forced into a transverse movement within the control curve 37. The Control curve 37 has a vertical extension. Basically divided the control curve in two linear sections 185, 186 and in two Steering zones 187.188. The pin 38 of the separation remains during the vertical movements of the control bar 36 at a height, migrates in this level, however, to the left or right (in the direction of arrow A or B) by following the course of the control curve 37. In the starting position, at which the screw unit 4 is at the highest position is the Pin 38 positioned in cam sole 78 during the downward stroke of Screw unit 4 moves the control bar 36 vertically, linearly below and slides along the inside 70 of its unear portion 185 of the pin 38. After the screw unit 4 a corresponding distance has been moved down, the control bar 36 hits with its first Steering zone 188 on the pin 38. The inclinations of the steering zones are selected so that the pin 38 can be reversed without hindrance can. After the steering zone 188 has passed the pin 38, this is recorded in the second linear section 186 until the curve apex 74 strikes the pin 38. The distance between them parallel linear sections 185,186 corresponds to that for separating the im Magazine 35 upstream fasteners required travel of the slide 39. When the screwing unit 4 is returned to its upper one Starting position, the linear section 186 slides along the pin 38. After the second steering zone 187 reaches the pin 38, this becomes again deflected transversely and taken up again in the curve sole 78. The Linear movement of the control bar 36 is via the centering block 9 transferred to which the control bar 36 is fastened by means of screws 191, 192 is.

The screw unit 4 is a commercially available screwdriver with a extended screw rod, not shown, on its free End of a bit is arranged for the rotationally fixed detection of the screw head. The screw rod extends coaxially through the lifting sleeves 6, 7 and is identical to screw-in axis 3. The screwdriver is over a Quick release 193 added, by pulling down the Screwdriver releases so that it can be removed from the device can be. When the screwdriver is reinserted, it snaps Quick release 193 in the area of the drill chuck and holds the Screwdriver tight. With 194-197 holes in the lifting sleeve 6 are designated in which the knurled screw 198 of the height adjustment device 199 engages, to adjust the device to different holder sizes. By Twisting the adjusting ring 200 can be fine-tuned become. The screw unit is close below the quick-release fastener 193 4 or the lifting sleeve 6 in a two-part clamping jaw 56, 57 recorded, which is part of a sled designated 51 The sled 51 has a slide plate 58 on the rear side 201 of a carrier plate 60 is attached. The slide plate 58 carries a receiving block in the head region 202, in which the longitudinal tube 55 of the handle 53 is inserted. In the Narrow sides of the carrier plate 60 are grub screws 204-207 used with which the four wheels 61.61a, 62.62a on the Carrier plate 60 are attached. Between the pairs of wheels is vertical extending rail 50 included, along the flanks of the Roll the wheels during the downward stroke of the slide 51. The Carriage 51 is supported on the gas pressure spring 52. At their top free At the end of the rail 50 has a stop 203, which is the same Stroke limit for the slide 51 specifies

With 53 the handle of the device is designated. It can, as in Figure 34 is shown (illustration from the back of the device), in two parts be trained and have a joint by a clevis Design of both handle parts 209 and 210 is formed. This contributes to this Handle part 209 at its end near the longitudinal tube 55 a tab 212, the is inserted into a slot 211 of the second handle part 210. By the Handle part 210 and the tab 212, a bolt 213 is guided, the Pivot axis of the handle forms. This configuration is special then an advantage if the device is used near the parapet. By Swinging the handle part 209 in the direction indicated by the arrow "z" and by turning the screwdriver by 90 ° the device can be screwed on and can be lowered on the handle part 210 without the handle part 209 on the parapet seated. The joint of the handle 53 is designed so that the handle tubes form a mutual stop with their walls. In the illustrated Embodiment, these are the slopes 214 and 215, the one Moving the grip part 209 beyond the horizontal orientation prevent down. Alternatively, the handle can be used instead of the vertical plane also pivoted horizontally or with a Be provided.

Different types can be used in the screwing device according to the invention are processed by fasteners. FIG. 33 shows a fastening element 65 which consists of a Plastic holder 86, in which a screw 84 is inserted. For this the plastic holder 86 has a shaft 69 which has a head portion has a concave support plate 80. Instead of a round one Support plates can also be used such fasteners which have an oval platter. Support plate 80 and shaft 69 are penetrated by a lifting channel 82 arranged coaxially to the longitudinal axis 59, in which the screw 84 is inserted and with its tip from the Holder tip emerges. In the magazine of the device according to the invention the plastic holder equipped with screws.

Alternatively, fasteners consisting of a screw and a particularly metallic washer.

The function of the device according to the invention will now be described explained.

After the magazine 35 is filled with fasteners 65, the Device 1 rolled to the assembly site. It is advantageous here if the tread 68 of the roller 67 slightly above the support edge 14 of the Housing 2 lies. The castor 67 cannot contact the ground come when the device 1 for the purpose of screwing seated. By slightly tilting the device towards the roller 67 the housing 2 is separated from the ground and can be the desired Assembly site to be rolled. First of all, the fastening elements 65 with its shaft 69, approximately horizontal, possibly slightly inclined Alignment in magazine 35, jostlingly on the top pawl 41 of the slide 39 on. This starting position is shown in both FIGS. 1 as well as in Figures 4,6 and 7, the screwdriver as is shown in Figure 29, is positioned in the uppermost position. At the Downward movement of the screw unit 4 by exerting pressure on the Handle 53, the centering block 9 is moved linearly downwards. (please refer Figure 1, dash-dotted representation) This downward movement leads to a Forced lowering of the control bar 36. The pin 38 slides Slider 39 along the inner guide wall 70 (see Figure 6) of the Linear section 185 of the control curve 37 and hits according to the corresponding Stroke to the first deflection 71 of the designated 188 Steering zone. During the further downward movement of the control bar 36 the pin is directed onto the bevel 72, the slide 39 in Arrow direction "B" is pushed. When the pin 38 has the second deflection 73 reached, the slide 39 has its longest path in the direction of arrow "B" covered and the top pawl 41 is from the stacking level 42 of the Magazine 35 withdrawn. Through the retracted pawl 41 a receiving opening 47 free, i.e. this sits below the stacking level 42 of the magazine 35, whereby those from the one above the other Fastening elements 65 formed stack column in the Separation chamber 49 drops. The stacking column then rests on the in the lower pawl 40 protruding into the stacking plane 42. The screwing unit 4 is in its lowest possible position, with the pin 38 at the vertex 74 of the outlet section 75 of the linear section 186. This first downward movement of the screw unit 4 practically stops Present without a screwing process being carried out. in the Thereafter, pressure is applied to the handle 53, after which the Gas pressure spring 52 returns the screw unit 4 to its uppermost position causes. The centering block 9 and the attached to it Control bar 36 moves up, the pin 38 along which the Outlet path linearly adjoining the inner guide wall 76 downward of the linear section 186 of the control cam 37 slides. If the pin 38 the deflection 77 located at the lower end of the inner guide wall 76 reached the steering zone 187, this leads to a further lowering Slider reset in the direction of the arrow "A", since the pin along the between Deflection 77 and bottom sole 78 slant 79 slides. at this slide movement, the upper pawl 41 sits between the Shaft 69 of the lower fastening element 65 and the shaft 69 'of the directly above fastening element 65 'and thus takes place a separation by the lowest fastening element 65 of the above jostling fasteners is separated. Then in the Separation chamber 49 located fastener 65 is by the pushing back lower pawl 40 released and falls over the Ejection opening 48 on the fork arms 18, 19 of the holding device 34 the fastener 65 with its longitudinal axis by about 90 ° pivoted so that the shaft 69 with its tip down or to Screwing point is directed. The screw unit 4 is down again pressed, the next one is pressed during the active screwing process Fastening element added to the separation chamber 49. At the Moving up the screw unit 4 becomes this fastener again by separating from those jostling over it Fasteners isolated by the upper pawl 41 between the shafts of the two bottom fasteners and the bottom fastener of the holder 34 is supplied becomes. The first up and down movement represents a filling stroke without that a fastening element is screwed into the roof surface. The subsequent lifting movements pull in during the driving phase synchronous separation and a presentation of the fasteners with it.

During the up and down stroke of the screwing unit 4 and the device parts controlled thereby, the holding device 34 is also activated. When the screwing unit 4 is in its uppermost rest position, the two fork arms 18, 19 running synchronously with each other are in their top dead center OT in the respective control groove 16.17. The distance between the two fork arms 18, 19 corresponds to an opening width at which the fastening element 65 can be taken over by the separating and feeding device 33 without friction and obstruction if the screwing unit 4 is guided upwards again after the first downward stroke and it is used as a template of the lowest, isolated fastener 65 comes. The fastening element 65 lies with the underside 81 of its support plate 80 on the fork arms 18, 19 which extend horizontally when the device is in the vertical position.
When lowering the screw unit 4 and thus the centering block 9, the fork arms are guided downwards by the control grooves 16, 17. In the upper section of the control cams, as soon as the fork arms 18, 19 emerge downward from their top dead center O _T , they are moved towards one another due to the course of the control curve. The fork arms 16, 17 thus perform a pliers movement in the area of the cam position KP and clamp the shaft 69 of the fastening element 65 between them. The fastening element 65 is thus also aligned in a position suitable for assembly, so that it cannot escape from the screw-in axis 3 until the screw rod is immersed in the lifting channel 82 of the fastening element 65. It is therefore immaterial whether work is carried out on a horizontal plane or on an inclined roof surface. The holding device always aligns the fastening element in the screw-in axis 3. When lowering further, the fork arms 18, 19 pass through the lower curve region 83, 85 and distance themselves from one another to such an extent that they emerge laterally under the support plate 80 and release the fastening element 65 in its entirety when the fork arms 18, 19 reach their bottom dead center UT at the curve exit 83.85. The screw 84 of the fastening element 65 has already drilled the subsurface in this phase, so that the drill tip immersed in the fastening element does not allow the fastening element to drop out or leave the screw-in axis. When the fastening element 65 is screwed tightly into the ground, an upward movement of the screwing unit 4 brings about the return of the fork arms 18, 19 from the bottom dead center U _T to their top dead center O _T , so that they are again ready to take over the next fastening element to be presented during the upward stroke ,

LIST OF REFERENCE NUMBERS

1

contraption

2

casing

3

screwing

4

screw unit

5

grab

6

lift sleeve

7

lift sleeve

8th

housing cover

9

centering

10

Floor of 2

11

housing wall

12

housing wall

13

Housing wall / front side

14

supporting edge

15

-

16

control groove

17

control groove

18

Gift arm of 5

19

Fork arm of 5

20

Housing wall from 2

21

-

22

-

23

Longitudinal fork axis from 18

24

Longitudinal fork axis from 19

25

Back of 9

26

Swivel axis of 18

27

Swivel axis from 19th

28

Hole in 8 for 6

29

Housing interior

30

Free end of 18

31

Free end of 19th

32

Throwing zone from 33/35

33

Separating and feeding device

34

holder

35

magazine

36

control bar

37

cam

38

spigot

39

pusher

40

Pawl of 39

41

Pawl of 39

42

batch level

43

Free end of 40

44

Free end of 41

45

Slide inside wall

46

Slide inside wall

47

receiving opening

48

ejection port

49

separation chamber

50

rail

51

carriage

52

Gas spring

53

handle

54

-

55

longitudinal tube

56

Jaw of 51

57

Jaw of 51

58

Slide plate from 51

59

Longitudinal axis of 65

60

Carrier plate from 51

61

Wheel

61a

Wheel

62

Wheel

62a

Wheel

63

Piston rod of 52

64

Bearing plate of 52

65

fastener

66

-

67

castor

68

Tread of 67

69

Shaft of 65

70

Inner guide wall from 37

71

Distraction from 37

72

Slope of 37

73

Redirection from 37

74

Crest of 37

75

Outlet distance of 37

76

Inner guide wall from 37

77

Redirection in 37

78

Sole of 37

79

Slant in 37

80

Plates from 65

81

Bottom of 80

82

Lift channel from 65

83

Curve runout from 16

84

screw

85

Curve runout from 17th

86

Plastic holder

87

Pillar of 2

88

Pillar of 2

89

Pillar of 2

90

Pillar of 2

91

Section from 10

92

Cones of 5

93

Cones of 5

94

Bearing block for 67

95

Mudguard v. 67

96

Incision in 8

97

Slit-shaped cutout in 8

98

Incision in 8

99

-

100

-

101

Screw in 8

102

Screw in 8

103

Screw in 8

104

Screw in 8

105

Linear section of 16

106

Linear section of 17

107

Deflection of 16

108

Deflection of 17

109

Tab of 33

110

Tab of 33

111

Slot of 109

112

Slit of 110

113

Front of 109

114

Back of 109

115

Face of 110

116

Back of 110

117

Flange of 39

118

Flange of 39

119

Footbridge of 39

120

Vertical bar of 35

121

Vertical bar of 35

122

Opening in 120

123

Opening in 120

124

Opening in 121

125

Opening in 121

126

Rear bar of 35

127

Frame bar from 35

128

Frame bar from 35

129

Angle bar from 35

130

Clasp of 35

131

Pin on 120

132

Incision from 130

133

Fingers of 32

134

Fingers of 32

135

Section of 133

136

screw

137

screw

138

screw

139

Spring for 140

140

Bullet in 121

141

Finger inside of 121

142

Trough in 121

143

Jaw from 18

144

Jaw from 19

145

Articulated strap from 18

146

Articulated strap from 19

147

Upper section of 134

148

Slide of 133

149

Slide from 134

150

Landing of 18

151

Landing from 19

152

Inside of 143

153

Inside of 144

154

Keyway in 143

155

Keyway in 144

156

Back of 145

157

Back of 146

158

Back of 143

159

Back of 144

160

Margins from 143

161

Margins from 144

162

Bottom of 9

163

Front of 9

164

Front of 9

165

Curvature of 9

166

Long side of 9

167

Long side of 9

168

Arc-shaped incision

169

Arc-shaped incision

170

sidebar

171

sidebar

172

Cylindrical depression in 9

173

Hole in 9

174

Hole in 9

175

Step bed in 9/172

176

grommet

177

Bunch of 176

178

Paragraph 175

179

spout tip

180

Sole of 165

181

Tapped hole in 9

182

Tapped hole in 9

183

Tapped hole in 9

184

Tapped hole in 9

185

Linear section of 37

186

Linear section of 37

187

Steering zone of 37

188

Steering zone of 37

189

-

190

-

191

Screw on 36

192

Screw on 36

193

quick release

194

Hole in 6

195

Hole in 6

196

Hole in 6

197

Hole in 6

198

thumbscrew

199

height adjustment

200

collar

201

Back of 58

202

receiving block

203

Stop / Stroke

204

Screw in 60

205

Screw in 60

206

Screw in 60

207

Screw in 60

208

Hole in 8

209

handle part

210

handle part

211

Slot in 210

212

Tab on 209

213

Bolts through 210 and 212

214

slope

215

slope

Claims (34)

1. Device for the screwing-in of fastening elements (65) used for the fastening of insulating material on flat and shed roofs by means of screws (84) placed loosely in a magazine (35) and previously inserted in a plastic holder (86) provided with a supporting plate (80) or in a plain washer, equipped further with a lowerable screwing unit (4) that can be activated by a separating and feeding device (33) and a holding device (34) for said fastening elements (65) in which each of the fastening elements (65) can be received prior to, and released again upon completion of, the screwing process, with the holding device (34) travelling - by the effect and as a result of the stroke of the screwing unit (4) - from an upper dead centre (O_T) to a bottom dead centre (U_T) and with the fastening elements (65) being clamped in the holding device (34) between said upper dead centre O_T and bottom dead centre U_T,
   wherein
   (i) a tongs-shaped gripper (5) is arranged in the holding device (34) the clamping motion of which is released by the stroke of the screwing unit (4), (ii) the tongs-shaped gripper (5) is formed by fork-shaped arms (18,19) designed to embrace the shaft (69) of the fastening element (65) and to serve as a support for the plain washer or the supporting plate (80) of the plastic holder (86), (iii) the fork-shaped arms (18,19) embrace the shaft (69) of the fastening element (65) in a transverse, with regard to its longitudinal axis (59), clamping motion, and (iv) each fork-shaped arm (18,19) is guided in control groove (16,17) arranged along the longitudinal axis of the screwing-in axis (3).
2. The Device as described in Claim 1 hereinbefore referred to wherein each of the fork-shaped arms (18,19) can be pivoted around an axis (26,27) offset in parallel to its own longitudinal axis (23,24).
3. The Device as described in Claim 1 hereinbefore referred to wherein the control grooves (16,17) are arranged on both sides of the screwing-in axis (3).
4. The Device as described in Claim 3 hereinbefore referred to wherein the control grooves (16,17) spread away from the screwing-in axis, rather than being arranged in parallel thereto, both in the zone of the upper dead centre (O_T) and in that of the lower dead centre (U_T).
5. The Device as described in either or several of Claims 1 and 2 hereinbefore referred to wherein the fork-shaped arms (18,19), together with their swivelling axes (23,24) are arranged along a centering block (9) which is allowed to travel vertically along the screwing-in axis (3).
6. The Device as described in Claim 5 hereinbefore referred to wherein the centering block (9) is arranged at the free end of a lifting sleeve (6,7) provided to envelope the screwing rod assembly of the screwing-in unit (4).
7. The Device as described in either or several of Claims 5 and 6 hereinbefore referred to wherein the screwing rod assembly of the screwing-in unit (4) passes through the centering block (9).
8. The Device as described in Claim 1 hereinbefore referred to wherein the holding device (34) is arranged inside a casing (2) that can be placed onto the roof substructure to be treated.
9. The Device as described in Claim 8 hereinbefore referred to wherein the casing (2) has an, at least partly, open bottom (10).
10. The Device as described in either or several of Claims 1, 3 and 4 hereinbefore referred to wherein the control grooves (16,17) are passed through the wall of the casing (12).
11. The Device as described in either or several of Claims 8, 9 and 10 hereinbefore referred to wherein the casing (2), on the side opposite (20) the side (12) provided with the control grooves (16,17) is, at least partly, open.
12. The Device as described in Claim 1 hereinbefore referred to wherein the magazine (35) is of the rigid form, with its ejection end (32) - arranged on the, at least partly, open side of the casing (20) - pointing at the holding device (34).
13. The Device as described in Claim 1 hereinbefore referred to wherein the separating and feeding device (33) is arranged, with regard to the holding device (34), at the near end of the magazine (35) and consists of a slide (39) travelling, in a linear motion, horizontally and transversely with regard to the magazine (35), such slide (39) being equipped with two detent pawls (40,41) which, under the effect of the stroke of the screwing-in unit (4), engage in the stacking level (42) of the magazine (35), pose and separate the fastening elements (65) and feed the lowermost fastening element (65), once separated from the flow of fastening elements (65) prevailing in the magazine (35), into the holding device (34).
14. The Device as described in Claim 13 hereinbefore referred to wherein the slide (39) has a journal (38) guided in a control strip (36) that can be lowered both vertically and linearly together with the screwing-in unit (4).
15. The Device as described in Claim 14 hereinbefore referred to wherein the control strip (36) is attached to the centering block (9).
16. The Device as described in either or several of Claims 1, 13 and 14 hereinbefore referred to wherein the screwing-in unit (4) is mounted on a carriage (51) allowed to travel in height along a vertical rail (50).
17. The Device as described in Claim 16 hereinbefore referred to wherein the carriage (51) has rollers (61,61a,62,62a) enveloping the rail (50) on both sides.
18. The Device as described in either or several of Claims 16 and 14 hereinbefore referred to wherein the carriage (51) rests on a gas pressure spring (52) which is aligned in parallel with the lifting sleeve (6,7).
19. The Device as described in either or several of Claims 8 to 12 hereinbefore referred to wherein the casing (2) has a caster wheel (67).
20. The Device as described in Claim 19 hereinbefore referred to wherein the tread (68) of the caster wheel (67) is mounted above the bearing edge (14) of the bottom of the casing.
21. The Device as described in either or several of Claims 7, 6, 7 and 15 hereinbefore referred to wherein the centering block (9) has an essentially cuboid form.
22. The Device as described in Claim 21 hereinbefore referred to wherein the centering block (9) of the holding device (34) has a bell-shaped form.
23. The Device as described in either or several of Claims 21 and 22 hereinbefore referred to wherein the centering block (9) has, on its bottom side (162), a concave curvature (165) arching inward.
24. The Device as described in either or several of Claims 21 to 23 hereinbefore referred to wherein the centering block (9) has side walls (166,167) with proud skirt strips (170,171) projecting above the concave curvature (165).
25. The Device as described in Claim 24 hereinbefore referred to wherein each of the skirt strips (170,171) has an arched recess (168,169).
26. The Device as described in either or several of Claims 21 to 24 hereinbefore referred to wherein a socket (176) is passed, in a coaxial configuration with regard to the screwing-in axis (3), through the centering block (9), with said socket (176) projecting above the bottom (180) of the concave curvature (1659.
27. The Device as described in either or several of Claims 1, 2 and 5 hereinbefore referred to wherein the fork-shaped arms (18,19) of the gripper (5) have a stepped shoulder (150,151) at each of their parallel adjoining walls, with said stepped shoulders (150,151) - in the closed position of the gripper (5) - engaging one in another in a tooth-shaped configuration and with each of the fork-shaped arms (18,19) having a key groove (154,155) applied to each of their parallel adjoining walls.
28. The Device as described in Claim 27 hereinbefore referred to wherein each of the fork-shaped arms (18,19) of the gripper (5) consist of a clamping jaw (143,144) and an articulated shackle (145,146), with each articulated shackle (145,146) being arranged mutually perpendicularly with regard to its corresponding clamping jaw (143,144).
29. The Device as described in Claim 28 hereinbefore referred to wherein each of the fork-shaped arms (18,19) of the gripper (5), on the rear of their articulated shackles (145,146), have a spigot (92,93) in extension of the longitudinal axis (23,24) of each fork-shaped arm (18,19), said spigot (92,93) being rotatable around its longitudinal axis (23,24).
30. The Device as described in either or several of Claims 1, 12 and 13 hereinbefore referred to wherein the ejection end (32) of the magazine (35) is constituted of two substantially Z-shaped fingers (133,134) each equipped with a chute (148,149) pointing at the gripper (5).
31. The Device as described in Claim 30 hereinbefore referred to wherein at least one of the fingers (133,134) is attached to the magazine (35) in a collapsible or pivotable manner.
32. The Device as described in either or several of Claims 30 and 31 hereinbefore referred to wherein the pivotable finger (134) rests on a spring-loaded ball (140) inserted into either the magazine (35) or the wall of the magazine.
33. The Device as described in either or several of the Claims hereinbefore referred to wherein a handle (53) is provided, such handle (53) being at least of the collapsible or pivotable type.
34. The Device as described in Claim 33 hereinbefore referred to wherein the handle (53) is composed of two pieces with at least one of the pieces of which it is composed (209,210) is attached in a pivotable, collapsible or pluggable manner to the adjoining piece of the handle.

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