WO2000068529A1

WO2000068529A1 - Device for screwing in fastening elements

Info

Publication number: WO2000068529A1
Application number: PCT/DE2000/001334
Authority: WO
Inventors: Harald Zahn
Original assignee: Harald Zahn Gmbh
Priority date: 1999-05-08
Filing date: 2000-04-27
Publication date: 2000-11-16
Also published as: DE10081254D2; EP1183430B1; DE20007649U1; AU5671300A; EP1183430A1; DE20007656U1; DE20007613U1; DE20007610U1; DE20007655U1; DE29908282U1

Abstract

The invention relates to a device for screwing in fastening elements, especially for fastening insulating material on flat roofs and sawtooth roofs, by means of screws that are stored in bulk in a magazine and that are inserted in a plastic holder that is provided with a feed table or in a washer. Said device has a screwing unit that can be lowered and a device for the fastening elements that marshals the screws into singles and feeds them to the screwing unit. Said marshalling and feeding device can be activated by the lowerable screwing unit. The device is also provided with a holding means which receives the fastening elements before they are screwed tight and then releases them. Said holding means can be displaced by the lifting movement of the screwing unit from an upper dead center to a bottom dead center. The holding means (34) jams the fastening element (65) between the upper dead center O-t and the bottom dead center U-t. The holding means (34) is mounted in a housing (2) which forms the assembly support of the device and on which the screwing unit (4) is mounted in a row with its lifting means and guides and represents a rod-shaped structure.

Description

DEVICE FOR SCREWING IN FASTENERS

description

The invention relates to a device for screwing in fasteners, in particular for fastening insulating material on flat and shed roofs by means of screws which are loosely arranged in front of a magazine, each inserted in a plastic holder having a support plate or in a washer, with a lowerable screw

Screwing unit, with a separating and feeding device for the fastening elements that can be activated by the lowerable screwing unit, and with a holding device in which the fastening elements in each case in front of the

Tightening screws are added and then released, the holding device being able to be guided from the top dead center to the bottom dead center by the lifting movement of the screw unit, according to the preamble of the main and secondary claims.

Devices of the type mentioned at the outset serve for the most efficient fastening of roof sealing and insulation material on flat and shed roofs and are offered in a wide variety of embodiments. Such screwing devices are known from German laid-open specification DE 42 40 607 A1. This known device has a feed device for the fastening elements, a lowerable screw unit and a holding device for the fastening element, which first picks it up before screwing it in and then releases it. Pre-assembled, two-part fastening elements, in particular consisting of a holding part and a screw, are processed in this device. 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 Do not engage the screw rod in the fastener or immerse it properly.

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 fastening element can tilt into a vertical position due to its heavier tip and therefore cannot be caught by the screw tip.

Another disadvantage of the known devices is their relative immobility. Due to the arrangement of the magazine, the screwing unit and its lowering aids, the separation and the feeding devices, these devices are not only difficult but also have an unfavorable size. The screw-in axis is located relatively far from the edge of the device, so that work on the attic of the roof or in the area of skylight domes is not possible with the known devices and must be done by hand at these points.

In contrast, the present device is intended to provide a device which is of considerably simpler construction and improvement and which does not have the problems of the known devices.

This object is achieved by a device of the aforementioned type in that the holding device clamps the fastening means between the bottom dead center and the top dead center, in accordance with the characterizing part of the main claim. According to an independent solution to the problem, it is proposed that the holding device be arranged in a housing which forms the mounting surface of the device and on which the screwing unit with its lifting aids and guides are arranged in a row so as to rise in a row. These arrangements disclosed in the main and secondary claims mean that the fastening element can also be processed on inclined roof surfaces. Even if the device according to the invention is in is in an inclined position, the fastener is aligned coaxially to the screw rod and thus to the screw axis. Due to the fact that the holding device activated by the lifting movement of the screwing unit also exerts a clamping action on the received fastening element, the device can also be used on the otherwise difficult to access roof locations without the function thereof being restricted in any way. Even on sloping roof surfaces, the fastener is aligned exactly in the screw-in axis for installation. In particular, the proposed row-shaped structure of the device permits a narrow construction, so that the device can be used on almost all roof locations. This advantage is achieved in particular because the screw-in axis of the device is located near the edge of the device due to its relatively small size, and thus roof edge areas or edge zones in the area of skylights can also be processed. In the device according to the invention, oval, round and magazined plastic screw combinations can be processed.

In a preferred embodiment of the invention it is provided that a gripper-shaped gripper is arranged in the holding device, the gripper movement of which is triggered by the lifting movement of the screwing unit. Due to the ability of the holding device to exert a pliers movement on the fastening element, e.g. the phases of the clamping and release situations are individually manipulated.

In a further expedient embodiment of the invention, it is provided that the pincer-shaped gripper is formed by the shank of the fastening element between fork arms enclosing it, on which the washer or the distributor plate of the plastic holder rests. Such a gripper is simple yet functional in construction. With such a gripper, a variety different fasteners are included. Even if the selected gripper shape would not be suitable for a certain type of fastening element, the gripper can be exchanged easily and quickly for an individually adapted gripper.

A very special advantage is that the fork arms enclose the shaft of the fastening element by means of a pincer movement oriented transversely to its longitudinal axis. This can be aligned in such a way that the gripper arms are not within the ejection path of the magazine or the feed device. Thus, the holding device contributes significantly to the narrow design achieved.

Each fork arm is expediently pivotable about an axis which is offset parallel to its own longitudinal axis. This means that the fork arms can carry the fastening element for a sufficient length of time and can only be swiveled out of the screw-in axis when, e.g. the screw tip or a guide sleeve has securely gripped the fastening element, so that it is no longer possible for the fastening element to break out of the screw-in axis.

In a preferred embodiment of the invention it is provided that each fork arm is guided in a control groove aligned in a vertical plane. For the size of the device, this in turn means that no adjusting or control means swivel out horizontally and thus have no influence on the width of the device. Depending on the number of fork arms, such control grooves are provided on both sides of the screw-in axis. This means that the fork arms can be controlled independently but also synchronously.

In a particularly preferred embodiment of the invention it is provided that the control grooves both in the area of top dead center as well as in the area of the bottom dead center away from the screw axis. This ensures that the holding device only closes during the downward movement of the screwing unit, that is to say the pliers movement is only activated after a predetermined path of the screwing unit and can thus be matched to the feed device and separation. Thus, the fastening element coming from the magazine or the feeding and separating device can be thrown into a relatively wide-open holding device which closes in a manner suitable for screwing in, fixes the fastening element and releases it at a given time.

The fork arms are expediently arranged with their pivot axes on a centering block which can be moved vertically along the screw-in axis. This ensures a synchronous process with this, especially since the centering block is arranged at the free end of a lifting sleeve surrounding the screw rod of the screw unit. This also ensures that any stroke delays on the lifting sleeve cannot be transmitted to the holding device, the control / operation of which is activated indirectly by the screwing unit but is not directly manipulated. The centering block is penetrated by the screw rod to such an extent that the screw insert can grasp the screw of the fastening element in a functional manner.

A particularly preferred embodiment of the invention provides that the holding device is arranged within a housing that can be placed on the roof to be treated. The moving parts of the holding device are thus delimited from the user, so that the risk of an accident is largely ruled out if the device is used properly. However, the housing has the further advantage that it serves practically 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 to align the device perpendicular to the roof surface and parallel to the roof edge, in particular to the parapet. For this purpose, the housing is at least partially open on the housing side carrying the control grooves. This ensures the unimpeded feeding of the fastening means to the holding device. The housing is also expediently at least partially open on the floor, so that no housing parts lying in the screw-in axis can interfere with the driving of the fastening elements into the roof substructure.

A particularly expedient embodiment of the invention provides that the magazine is rigid and is arranged on the at least partially open side of the housing with its ejection end, directed towards the holding device. Compared to swiveling magazines, the magazine of the device according to the invention is more favorable in its presentation behavior. That the fastening elements located in the magazine are not exposed to any swiveling movements through the magazine and remain relatively evenly upstream in the magazine, which considerably facilitates the subsequent separation.

A particularly preferred embodiment of the invention provides that the singling and feeding device is arranged at the end of the magazine near the holding device and consists of a slide which can be moved linearly horizontally and transversely to the magazine and which has two pawls which, caused by the lifting movement of the screwing unit , engage in the stacking level of the magazine and present the fasteners, separate them and feed the fastener, which is separate from the magazine stream, to the holding device. This is the simplest but most effective way of creating a separating device that works in a confined space. The slide practically moves only on a path that is approximately the shaft diameter of the Fastener corresponds. Since here, too, no device parts swivel out horizontally, the action radius of the slide is limited to the housing width or its length, so that the narrow construction of the device is also preserved here.

The slide expediently carries a pin which is guided within a control bar which can be lowered vertically and linearly together with the screw unit. Due to the linear movement of the control bar, deviations of the slide movement are almost impossible. Here, too, the control bar is connected to the centering block and coupled directly to its lifting movement. Stroke delays of the screwdriver unit are therefore not transmitted directly to the control bar, so that its control linkage is largely independent.

A further preferred embodiment of the invention provides that the screwing unit is arranged on a slide that can be moved vertically along a vertical rail. The slide has rollers that enclose the rail on both sides and is supported on a gas pressure spring aligned parallel to the lifting sleeve. As a result of this arrangement, the screwing unit does not require any additional guide means, which would only unnecessarily increase the width and length of the device and its weight. The screw unit is guided by its own lifting sleeve, which penetrates the ceiling of the housing. The guidance of the slide on the rail does not allow lateral deflection.

The centering block belonging to the holding device delimits the lifting sleeve at 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 serves, in which a plate one Fastener can at least partially immerse. This is particularly advantageous for oval support plates. By partially immersing the plate in the centering block, it is protected against twisting around the longitudinal axis of the fastener. In a particularly preferred embodiment of the invention, the bell shape is achieved, for example, by milling a concave curvature on the underside of the centering block. The curvature is expediently designed so that it corresponds to the curvature of the oval, curved support plate of a fastener.

If, in addition, as is provided in an advantageous development of the invention, edge strips are formed on the longitudinal sides of the centering block, which protrude beyond the curvature of the centering block, the centering safety is further improved. A twisting of the fasteners is then completely ruled out because the support plate strikes the inside of the edge strips.

It makes sense to provide the edge strips with an arcuate incision so that the holder can slide freely when inserted into the gripper.

In a further advantageous embodiment of the invention it is provided that the centering block is penetrated by a grommet in the region of the screw-in axis, which protrudes beyond the base of the arch. During the downward stroke of the centering block, the grommet plunges into the lifting channel of a two-part fastening element and gives it a pre-alignment, which the screwdriver linkage follows. When using other fasteners, the grommet is pushed back or removed.

A further advantageous embodiment of the invention provides that the fork arms of the gripper on each of their parallel adjacent walls have a step-shaped shoulder, which interlock in the closed position of the gripper, the fork arms each having a keyway in this area. The shank of the fastener is securely clamped in the adjacent keyways that complete a prism. The shaft cannot be displaced against the jaws or transversely to them. A particular advantage is that the fastening element is thereby precisely aligned in the screw-in axis. This is particularly advantageous when working on roofs with a slight slope.

A further advantageous embodiment of the invention provides that the fork arms of the gripper each consist of a clamping jaw and a joint plate, the joint plate being arranged orthogonally to the respective clamping jaw. On the one hand, this has the advantage that both parts can be made from different materials. On the other hand, the fork arm does not have to be completely replaced if it is worn or damaged.

A further advantageous embodiment of the invention provides that the fork arms of the gripper each have a pin on the back of their articulated brackets, which extends the longitudinal axis of the respective fork arm and can be rotated about the respective longitudinal axis. This eliminates almost any frictional force influencing the control and the device is easy to operate.

A further advantageous embodiment of the invention provides that the ejection end of the magazine is formed from two largely Z-shaped fingers, each of which has a slide directed against the gripper. This creates a transition zone in which the fastening element automatically engages after it has been separated, even when the device is tilted, as is customary 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 the magazine, separator and holding device must be dimensioned so that on the one hand the fastening element can be transferred into the screw-in axis without hindrance and on the other hand the scope in which the fastening element moves must not be too large in order to avoid incorrect feeding The proposed measure provides a means with which a holder that has already been placed can be removed from the device in the event of a malfunction of the device. By pivoting the foldable finger away, an access possibility to the holding device is created, from which the fastening element can be quickly removed. For this purpose, the pivotable or foldable finger is expediently mounted on a spring-loaded ball which is inserted in the magazine or in the magazine wall. The ball exerts a compressive force on the finger so that it cannot move out of its closed position automatically.

Another advantageous embodiment of the invention provides that the handle is at least foldable or pivotable. This is particularly advantageous when working on the roof edge, close to the parapet. The stroke is cleared by folding or swiveling the handles. This means that the user can drive so close to the parapet with the device according to the invention without hitting the parapet with the handle. The handle can be swiveled in so that it glides past the parapet at a sufficient distance during the downward stroke. Alternatively, a handle part can be inserted, for example, into the adjacent handle part. If necessary, the plug connection is released. Further advantages and advantageous embodiments of the invention can be found in the following description, the drawing and the claims.

The drawing shows a particularly preferred embodiment of the invention. Show:

Figure 1 is a side view of the entire device

FIG. 2 shows a front view of the entire device from the direction II indicated in FIG. 1

3 shows an enlargement of the device in the area of the housing, without magazine and without feeding and singling. FIG. 4 shows a section along the line IV-IV indicated in FIG. 3

Figure 5 is a plan view of the housing cover without superstructures and without components passing through the plate

Figure 6 is a perspective view of the separation and

Feeder Figure 7 is an enlarged side view of the device in the area of

Separating and feeding device FIG. 8 shows the device from the same perspective as in FIG. 7 but without the magazine FIG. 9 shows a perspective view of the magazine

10 shows a view of the right half of the magazine from the direction X indicated in FIG. 9 FIG. 11 shows a side view of the magazine from the direction XI indicated in FIG. 10 FIG. 12 shows the detail marked XII in FIG

Enlargement Figure 13 is a perspective view of the closed gripper Figure 14 shows the disassembled gripper parts in a perspective view Figure 15 shows the left fork arm of the gripper in a front view

Figure 16 shows the left fork arm of the gripper in a side view from the direction marked XVI in Figure 15

Figure 17 shows the left fork arm of the gripper in a top view Figure 18 shows the left fork arm of the gripper in a rear view

Figure 19 shows the left fork arm of the gripper in a side view, from the direction XIX indicated in Fig. 18

Figure 20 shows the right fork arm of the gripper in a front view

Figure 21 shows the right fork arm of the gripper in a side view from the direction XXI

Figure 22 shows the right fork arm of the gripper in a plan view

Figure 23 shows the right fork arm of the gripper in a side view, from the direction XXIII indicated in Fig. 24

Figure 24 shows the right fork arm of the gripper in a rear view. Figure 25 shows a perspective view of the centering block

Figure 26 is a front view of the centering block

Figure 27 is a side view of the centering block

Figure 28 is a plan view of the centering block

Figure 29 is an enlarged view of the upper portion of the device. Figure 30 shows the rail with carriage in a front view

Figure 31 is a side view of the rail with sled

Figure 32 is a plan view of the rail with slide

FIG. 33 a fastening element that can be processed in the device

Figure 34 shows the handle in an enlarged view

As can be seen in particular from FIGS. 1 and 2, the construction of the device designated as a whole by 1 is similar to that of a stick. A screw unit 4 extends over a housing 2, the screw rod assembly (not shown in more detail) being surrounded by a multi-part, telescopically constructed lifting sleeve 6, 7. The screwing unit 4 is in the clamping jaws 56, 57 of a slide designated overall by 51 clamped and movable together with it in the vertical direction. This is done by exerting a downward vertical pressure on the handle 53. A linear guide on the slide 51 is predefined by a rail 50 aligned parallel to the screw-in axis 3. The carriage 51 itself is supported on a gas pressure spring 52. Due to the upward and downward movement of the screwing unit 4, fastening elements 65 arranged upstream and approximately parallel to one another are separated in a magazine 35 arranged approximately parallel to the screwing axis 3. Separating and feeding elements are moved mechanically by the lifting movement of the screwing unit, thereby removing one fastening element 65 from the stream of upstream fastening elements 65 jostling one above the other from the magazine 35 and bringing it into the desired screwing position coaxially with the screwing axis 3. There it is gripped by the screw rod of the screw unit 4 and driven into the roof surface.

Before the function of the device 1 and the movement sequence of all the individual parts involved in the magazine, as well as the separating and screwing-in process are discussed, the device parts are described in detail below.

With 2 the housing of the device 1 is designated. The housing 2 has the shape of an upright prism. The corner areas are delimited by vertically rising columns 87,88,89,90. The housing 2 is open to the front side 13, on its wall 20 close to the magazine, and to the bottom 10, a cutout 91 being located in the bottom 10, which is delimited by a peripheral support edge 14. The side opposite the end face 13 is closed with a housing wall 11. Likewise, the side remote from the magazine is closed with a housing wall 12. In the housing wall 12 are two control grooves 16, 17 incorporated. A fork arm 18, 19 of a gripper 5 is guided in each of these control grooves 16, 17 and has for this purpose on its fork longitudinal axes 23, 24, pins 92, 93 that engage in the control grooves 16, 17. The upper area of the housing is closed with a housing cover 8. This housing cover 8 is a rectangular plate with rounded corner areas. The housing cover 8 has an incision 96 on one of its long plate flanks, in which the magazine 35 is fastened with its rear strip 126. There are three cutouts inside the panel. The first, slot-shaped cutout 97 serves for the free passage of a control bar 36 (see, for example, FIG. 4). Another plate section is the circular cylindrical bore designated 28 through which the lifting sleeve 6, 7 (see, for example, FIG. 4) is passed. The gas pressure spring 52 is passed through the bore 208 provided in the edge region. The rail 50 (see for example FIG. 3) is partially accommodated in the incision designated 98. Using the screws 101-104 screwed into the corner areas, the housing cover is connected to the columns 87, 88, 89 and 90 located underneath.

On the outside of the housing wall 11, a bearing block 94 is fastened for receiving a roller 67, over which a protective plate 95, which is also fastened to the housing wall 11, extends. On the inside of the housing wall 11, a bearing plate 64 is fastened, 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 aligned parallel to the screw-in axis 3. The control groove 17 is a mirror image of the control groove 16. It is a special feature that the control knobs 16, 17 each have, in addition to their linear sections 105, 106, a lower curve runout 83, 85, and also each have a deflection 107, 108 in the upper section. Both the customer outlets 83, 85 and the deflections 107, 108 lead away from the screw-in axis 3. On the housing 2, a separating and feeding device designated 33 is attached.

Two approximately U-shaped tabs 109, 110 are arranged on the housing cover 8. Both tabs 109, 110 have a slot 111, 112, which passes through the respective tab from the front face 113, 115 to the rear face 114, 116. The slots 111, 112 have a clear width which corresponds approximately to the cross section of a slide 39 guided therein. The slider 39 is approximately C-shaped in cross section and thus has a web 119 lying orthogonally between two flanges 117, 118. The web 119 is movably received in the slots 111, 112 of the tabs 109, 110 in the arrow directions “A” and “B”. On its flanges 117, 118, a pawl 40, 41 extends orthogonally to these, offset in height from one another, the two free ends 43, 44 of which end in approximately a line. The pawls 40, 41 extend horizontally approximately at right angles to the longitudinal axis of the magazine and engage in the stacking plane 42 of the magazine 35. The length of the pawls 40, 41 is selected such that there is a receiving opening 47 or an ejection opening 48 between their free ends 43, 44 and the respectively opposite inner wall 45, 46 of the slide. A separating chamber 49 is formed between the two openings 47, 48. The pawls 40, 41 are made of round material and extend through circular cylindrical openings 122, 124 and 123, 125 in the vertical bars 120, 121 of the magazine 35. The movement of the slide 39 to the left or right (direction A or B) of the magazine 35 is performed by guiding one Pin 38 within the Steuerkuπ / e 37 of the control bar 36 causes when it moves together with the screw unit 4 down.

The magazine is designated by 35. The magazine 35 has essentially a cage-like shape and consists of two vertical bars 120, 121 spaced apart and parallel to one another in the front area and a rear bar 126. The vertical bars 120, 121 and the rear bar Strip 126 are connected to one another by frame strips 127, 128. The rear section 126 is fastened with its lower section to the housing cover 8. At approximately half the magazine height, the magazine 35 is attached to the front of the rail 50 with an angle bar 129. In the upper section, the magazine 35 is closed with a clip 130. For this purpose, the vertical rod 120 of the magazine 35 has a pin 131 at its free end, which is encompassed by an incision 132 in the clip 130. The clip 130 is arranged on the free end of the vertical rod 121 so as to be pivotable about its longitudinal axis. The magazine 35 can thus be closed again after it has been filled with fastening elements. Another special feature of the magazine 35 is the design of the ejection zone, designated as a whole by 32. An approximately z-shaped finger 133, 134 is attached to each vertical rod 120, 121 and is bent in the direction of the screw-in axis 3. One of the fingers 133 shown is rigidly attached to the vertical rod 120 of the magazine 35 with its upper vertical section 135 by two screws 136, 137. In its upper section 147, however, the adjacent finger 134 has only one fastening screw 138, with which it is rotatably arranged about the axis “Y” on the vertical rod 121. An inclined slide 148, 149 adjoins the upper sections 135, 147 in the direction of the floor the free ends 30, 31 of the gripper 5 are directed into the interior 29 of the housing 2 (see, for example, FIG. 4), through which the isolated and released fastening elements slide onto the gripper 5. So that the finger 134 does not automatically move out of its closed position a ball 140, which is under pressure from a spring 139 and is pressed into a recess 142 arranged on the inside of the finger 141, is inserted in the vertical rod 121. By turning the finger 134 about the axis “V, an access opening to the gripper 5 is created.

The gripper designated 5 is essentially of a pincer 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 an articulated plate 145, 146 through which the associated pivot axis 26 and 27, respectively, runs. The hinge plates 145, 146 are fastened with their pivot axes 26, 27 to the rear 25 of the centering block 9. The fork arms 18, 19 have essentially a wedge shape, an open stair 150 being formed in the fork arm 18. For this purpose, the fork arm 19 forms the counterpart with a shoulder 151 that is open at the bottom, so that both fork arms engage with one another in the area of their shoulders 150, 151. The inner sides 152, 153 of the clamping jaws 143, 144 are each formed with a keyway 154, 155. On the rear sides 156, 157 of the articulated brackets 145, 146 there is provided in each case a pin 92, 93 which is arranged coaxially to the longitudinal axes 23, 24 of the fork and which each protrude into one of the associated control grooves 16 and 17 of the housing wall 12 of the housing 2 (see, for example, FIGS. 1 and 3) . The pins 92, 93 are freely rotatable about their axis. Both clamping jaws 143, 144 have an inclined back 158, 159 that slopes towards the floor. This is advantageous, inter alia, if a fastening element 65 (see FIG. 33) with a screw 84 inserted in a plastic holder 86 is used, in which the support plate 80 is curved concavely. The support plate 80 is largely seated on the edge strips 160, 161 of both clamping jaws 143, 144.

A centering block 9 is arranged at a sufficient distance above the gripper 5 at the lower end of the lifting sleeves 6, 7. The centering block 9 has a substantially cuboid shape and is formed on its underside 162 with a concave curvature 165 extending between the short end faces 163, 164, which corresponds approximately to the concave curvature of the support plate of a plastic holder. The long sides 166, 167 protrude over the curvature 165 as narrow edge strips 170, 171 and are themselves provided with an arcuate incision 168, 169. The overhanging skirting boards 170, 171 prevent a here with can turn its support plate oval plastic holder. 172 denotes a circular cylindrical recess into which the lifting sleeve 7 is immersed and is fastened from the underside of the centering block by means of screws screwed into the bores 173, 174. In the step bed 175 provided in the center of the cylindrical recess, a grommet 176 is inserted, which is supported with its collar-shaped collar 177 on the shoulder 178 of the step bed 175. The spout tip 179 projects beyond the sole 180 of the concave curvature 165. The link plates 145, 146 of the gripper 5 are screwed into the rear threaded bores 181, 182. These screw points thus form the pivot axes 26, 27 of the fork arms 18, 19. In the front of the centering block 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. The pin 38 of the slide 39 of the separating and feeding device 33 engages in this. The control strip 36 moves in a vertical manner synchronously with the screwing unit 4 in a slip-free manner, at least in a partial section. An actuating movement for the separation is derived by forcing the pin 38 within the control curve 37 into a transverse movement. Steuerskuπ / e 37 has a vertical extension. The control curve is essentially divided into two linear sections 185, 186 and two steering zones 187, 188. The pin 38 of the separation remains at one level during the vertical movements of the control bar 36, but moves in this plane transversely 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, in which the screwing unit 4 is in the highest position, the pin 38 is positioned in the cam sole 78. During the downward stroke of the screwing unit 4, the control bar 36 moves vertically, linearly downwards and slides with the inside 70 of its linear section 185 along the pin 38. After the screwing unit 4 has traveled a corresponding distance has been moved downward, the control bar 36 strikes the pin 38 with its first steering zone 188. The inclinations of the steering zones are selected such that the pin 38 can be reversed without hindrance. After the steering zone 188 has passed the pin 38, this is received in the second linear section 186 until the curve apex 74 abuts the pin 38. The distance between the parallel linear sections 185, 186 corresponds to the travel of the slide 39 required to separate the fasteners located in the magazine 35. When the screwing unit 4 is returned to its upper starting position, the linear section 186 slides along the pin 38. After the second steering zone 187, the pin 38 reached, this is again deflected transversely and again taken up in the curve sole 78. The linear movement of the control bar 36 is transmitted via the centering block 9, to which the control bar 36 is fastened by means of screws 191, 192.

The screwing unit 4 is a commercially available screwdriver with an extended screw rod, not shown in more detail, at the free end of which a bit for the rotationally fixed detection of the screw head is arranged. The screw rod extends coaxially through the lifting sleeves 6, 7 and is identical to the screw-in axis 3. The screwdriver is received via a quick-release fastener 193, which releases the screwdriver by pulling downwards, so that it can be removed from the device. When the screwdriver is reinserted, the quick fastener 193 snaps into the area of the drill chuck and holds the screwdriver firmly. With 194-197 bores in the lifting sleeve 6 are designated, in which the knurled screw 198 of the height adjustment device 199 engages in order to adjust the device to a wide variety of holder sizes. A fine adjustment can be made by turning the adjusting ring 200. The screw unit 4 or the lifting sleeve 6 is located in a two-part clamping jaw 56, 57 near the quick-release fastener 193 recorded, which is part of a carriage designated 51. The carriage 51 has a slide plate 58 on the rear side 201 of which a carrier plate 60 is fastened. In the head region, the sliding plate 58 carries a receiving block 202 in which the longitudinal tube 55 of the handle 53 is inserted. In the narrow sides of the carrier plate 60 on both sides, grub screws 204-207 are inserted, with which the four impellers 61, 61a, 62, 62a are fastened to the carrier plate 60. The vertically extending rail 50 is enclosed between the pairs of wheels, along the flanks of which the running wheels roll during the downward stroke of the slide 51. The carriage 51 is supported on the gas pressure spring 52. At its upper free end, the rail 50 has a stop 203, which at the same time specifies the stroke limitation for the slide 51.

With 53 the handle of the device is designated. As shown in FIG. 34 (illustration from the rear of the device), it can be formed in two parts and have a joint which is formed by a fork head design of both handle parts 209 and 210. For this purpose, the grip part 209 carries a tab 212 at its end close to the longitudinal tube 55, which is inserted into a slot 211 of the second grip part 210. A bolt 213, which forms the pivot axis of the handle, is guided through the handle part 210 and the tab 212. This configuration is particularly advantageous if the device is used near the parapet. By swiveling the handle part 209 in the direction indicated by the arrow “z” and by turning the screwdriver by 90 °, the device on the screwdriver and on the handle part 210 can be lowered without the handle part 209 sitting on the parapet. The hinge of the handle 53 is designed in this way that the handle tubes form a mutual stop with their walls. In the exemplary embodiment shown, these are the bevels 214 and 215, which prevent the handle part 209 from moving further downward over the horizontal orientation vertical level can also be swiveled horizontally or provided with a plug connection.

Various types of fastening elements can be processed in the screwing device according to the invention.

FIG. 33 shows a fastening element 65 which consists of a plastic holder 86 into which a screw 84 is inserted. For this purpose, the plastic holder 86 has a shaft 69 which has a concavely curved support plate 80 in the head region. Instead of a round support plate, it is also possible to use fastening elements which have an oval support plate. Support plate 80 and shaft 69 are penetrated by a lifting channel 82 arranged coaxially to the longitudinal axis 59, into which the screw 84 is inserted and the tip of which emerges from the holder tip. The plastic holders equipped with screws are accommodated in the magazine of the device according to the invention.

Alternatively, fasteners consisting of a screw and a metallic washer, in particular, are processed.

The function of the device according to the invention is now explained below.

After the magazine 35 is filled with fastening elements 65, the device 1 is rolled to the assembly point. It is advantageous here if the running surface 68 of the roller 67 lies somewhat above the support edge 14 of the housing 2. The castor 67 cannot come into contact with the ground when the device 1 is seated for the screwing-in process. By slightly tilting the device in the direction of the roller 67, the housing 2 is separated from the ground and can be rolled to the desired mounting location. First, the fastening elements 65, with their shaft 69, lie in an approximately horizontal, possibly slightly inclined orientation in the magazine 35, in a pushing manner on the upper pawl 41 of the slide 39. This starting position is shown in both FIGS. 1 and also shown in FIGS. 4, 6 and 7, the screwdriver as shown in FIG. 29 being positioned in the uppermost position. When the screwing unit 4 is moved downward by exerting pressure on the handle 53, the centering block 9 is also moved linearly downward (see FIG. 1, dash-dotted line). This downward movement leads to a forced lowering of the control bar 36. The pin 38 of the slide 39 slides along the inner one Guide wall 70 (see FIG. 6) of the linear section 185 of the control cam 37 and, after a corresponding stroke, meets the first deflection 71 of the steering zone denoted by 188. During the further downward movement of the control bar 36, the pin is directed onto the bevel 72, the slide 39 being pushed in the direction of arrow "B". When the pin 38 reaches the second deflection 73, the slide 39 has its longest path in the direction of arrow "B" covered and the top pawl 41 is withdrawn from the stacking level 42 of the magazine 35. The retracted pawl 41 clears a receiving opening 47, that is to say it sits below the stacking level 42 of the magazine 35, the stacking column formed from the fastening elements 65 located one above the other falling into the separating chamber 49. The stacking column then rests on the lower pawl 40 which still protrudes into the stacking plane 42. The screwing unit 4 is in its lowest possible position, the pin 38 being located at the apex 74 of the outlet section 75 of the linear section 186. This first downward movement of the screwing unit 4 practically represents an advance without a screwing process being carried out. Subsequently, the pressure on the handle 53 is released, after which the gas pressure spring 52 brings the screw unit 4 back into its uppermost position. The centering block 9 and the control strip 36 attached to it are also moved upward, the pin 38 sliding along the inner guide wall 76 of the linear section 186 of the control curve 37, which linearly adjoins the outlet section. When the pin 38 has the deflection 77 located at the lower end of the inner guide wall 76 reached the steering zone 187, this leads to a lowering of the slider in the direction of arrow "A" because the pin slides along the slope 79 between the deflection 77 and the lower sole 78. During this slider movement, the upper pawl 41 sits between the shaft 69 of the lower fastening element 65 and the shaft 69 ^' of the fastening element 65 ^' lying directly above it and thus performs a separation by separating the lowermost fastening element 65 from the fastening elements jostling above it. The fastening element 65 then located in the separation chamber 49 is separated by the pushing-back lower pawl 40 released and falls via the ejection opening 48 onto the fork arms 18, 19 of the holding device 34. The fastening element 65 is pivoted with its longitudinal axis by approximately 90 °, so that the shaft 69 is directed with its tip downwards or towards the screwing point Screw Unit 4 pressed down again, the subsequent fastener is received in the separation chamber 49 during the active screwing process. When the screwing unit 4 is moved upwards, this fastening element is again separated by separating from the fastening elements jostling over it, in that the upper pawl 41 is pushed between the shafts of the two lowest fastening elements and the lowest fastening element is fed to the holding device 34. The first upward and downward movement represents a filling stroke without a fastening element being screwed into the roof surface. The subsequent lifting movements involve a synchronous separation and the attachment of the fasteners during the driving-in phase.

During the up and down stroke of the screw 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 of the two fork arms 18, 19 corresponds to one another 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, thereby presenting the bottom one , 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 downward 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 Oτ, 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 an assembly-appropriate position, 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 fastener 65 is screwed tightly into the ground is, an upward movement of the screw unit 4 causes the fork arms 18, 19 to be reset from the bottom dead center UT to their top dead center Oτ, so that they are again ready to take over the next fastening element to be presented during the upward stroke.

All of the features specified in the claims, the description and the drawings can be essential to the invention both on their own and together with other features.

Reference list

1 device

2 housings

3 screw-in axis

4 screw unit

5 grippers

6 lifting sleeve

7 lifting sleeve

8 housing cover

9 centering block

10 floor of 2

11 housing wall

12 housing wall

13 housing wall / end face

14 support edge

15 -

16 tax groove

17 tax groove

18 fork arm of 5

19 fork arm of 5

20 housing wall of 2

21 -

22 -

23 fork longitudinal axis of 18

24 fork longitudinal axis from 19

25 back of 9

26 pivot axis of 18

27 swivel axis of 19

28 hole in 8 for 6

29 housing interior Free end of 18

Free end of 19th

Ejection zone from 33/35

Separating and feeding device

Holding device

magazine

Control bar

Control curve

spigot

pusher

Pawl of 39

Stacking level

Free end of 40

Free end of 41

Inner slide wall

Receiving opening

Discharge opening

Separation chamber

rail

carriage

Gas pressure spring

Handle

-

Longitudinal tube

Jaw of 51

Slide plate from 51

Longitudinal axis of 65

Carrier plate from 51

Impeller a impeller

Piston rod of 52

Bearing plate from 52

Fastener

-

Castor

Tread of 67

Shaft of 65

Inner guide wall from 37

Distraction from 37

Slope of 37

Redirection from 37 74 vertices of 37

75 outlet section of 37

76 inner guide wall of 37

77 deflection in 37

78 sole of 37

79 slant in 37

80 support plates of 65

81 bottom of 80

82 lift channel of 65

83 curve runout from 16

84 screw

85 curve runout from 17

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 from 67

96 incision in 8

97 slot-shaped cutout in FIG. 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 from 17

107 deflection of 16

108 deflection from 17

109 tab of 33

110 tab of 33

111 slit of 109

112 slit of 110

113 face 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 rod of 35

121 vertical rod of 35

122 opening in 120

123 opening in 120 124 opening in 121

125 opening in 121

126 rear panel of 35

127 frame bar of 35

128 frame strip from 35 129 angle strip from 35

130 clasp of 35

131 pen to 120

132 incision from 130

133 fingers out of 32 134 fingers out of 32

135 section of 133

136 screw

137 screw

138 screw 139 spring for 140

140 bullet in 121

141 inside of 121

142 trough in 121

143 jaw from 18 144 jaw from 19

145 articulated strap from 18

146 hinged bracket from 19

147 Upper section of 134

148 slide of 133 149 slide of 134

150 landing of 18

151 landing of 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 backs from 143 159 backs from 144

160 margins from 143

161 marginal strips from 144

162 bottom of 9

163 face of 9 164 face 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 spout

177 fret of 176

178 paragraph of 175

179 spout tip

180 sole of 165

181 threaded hole in 9

182 threaded hole in 9

183 threaded hole in 9

184 threaded 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 recording block

203 stop / stroke limitation

204 screw in 60

205 screw in 60

206 screw in 60

207 screw in 60 208 hole in 8

209 grip part

210 handle part

211 slot in 210

212 tab on 209

213 bolts through 210 and 212

214 slant

215 slant

Claims

Expectations

1. Device for screwing fasteners, in particular for fastening insulating material on flat and

Shed roofs by means of screws loosely mounted in front of a magazine, each inserted in a plastic holder with a support plate or in a washer, with a lowerable screw unit, with a separating and feeding device for the one that can be activated by the lowerable screw unit

Fastening elements and with a holding device in which the fastening elements are each received before tightening and then released, the holding device being able to be guided from an upper dead center to a lower dead center by the lifting movement of the screwing unit, characterized in that the

Holding device (34) between the top dead center Oτ and the bottom dead center U _T clamps the fastener (65).

2. Device for screwing fasteners, in particular for fastening insulating material on flat and

Holding device (34) is arranged in a housing (2) which forms the mounting surface of the device and on which the screw unit (4) with its lifting aids and guides are arranged in a row soaring.

3. Device according to one of the preceding claims, characterized in that in the holding device (34) a pincer-shaped

Gripper (5) is arranged, the pliers movement of which is triggered by the lifting movement of the screwing unit (4).

4. Device according to one of the preceding claims, characterized in that the pincer-shaped gripper (5) by fork arms

(18, 19) is formed, which encloses the shaft (69) of the fastening element (65) between them and on which the washer or the support plate (80) of the plastic holder (86) rests.

5. Device according to one of the preceding claims, characterized in that the fork arms (18, 19) enclose the shaft (69) of the fastening element (65) by means of a tong movement oriented transversely to its longitudinal axis (59).

6. Device according to one of the preceding claims, characterized in that each fork arm (18, 19) can be pivoted about an axis (26, 27) arranged offset parallel to its own longitudinal axis (23, 24).

7. Device according to one of the preceding claims, characterized in that each fork arm (18,19) in a vertical plane aligned control groove (16,17) is guided.

8. Device according to one of the preceding claims, characterized in that the control grooves (16, 17) on both sides of the

Screw-in axis (3) are arranged.

. Device according to one of the preceding claims, characterized in that the control grooves (16, 17) lead away from the screw-in axis (3) both in the region of the top dead center (Oτ) and in the region of the bottom dead center (UT).

10.Device according to one of the preceding claims, characterized in that the fork arms (18, 19) with their pivot axes (23, 24) are arranged on a centering block (9) which can be moved vertically along the screw-in axis (3).

11. Device according to one of the preceding claims, characterized in that the centering block (9) is arranged at the free end of a lifting sleeve (6, 7) surrounding the screw rod of the screw unit (4).

12. Device according to one of the preceding claims, characterized in that the centering block (9) is penetrated by the screw rod of the screw unit (4).

13. Device according to one of the preceding claims, characterized in that the holding device (34) is arranged within the housing (2) which can be placed on the roof surface to be treated.

14. Device according to one of the preceding claims, characterized in that the housing (2) is at least partially open at the bottom (10).

15. Device according to one of the preceding claims, characterized in that the control grooves (16, 17) penetrate the housing wall (12).

16. Device according to one of the preceding claims, characterized in that the housing (2) on the housing wall (12) having the control grooves (16, 17) opposite the housing side (20) is at least partially open.

17. Device according to one of the preceding claims, characterized in that the magazine (35) is rigid and is arranged on the at least partially open housing side (20) with its ejection end (32) directed towards the holding device (34).

18. Device according to one of the preceding claims, characterized in that the singling and feeding device (33) is arranged at the end of the magazine (35) near the holding device (34) and linearly movable horizontally and transversely to the magazine (35)

Slider (39), which has two pawls (40, 41), which, caused by the lifting movement of the screw unit (4), engage in the stacking plane (42) of the magazine (35) and present the fastening elements (65), isolate and do that Feed the lowest fastening element (65) to the holding device (34), each separated from the magazine flow.

19. Device according to one of the preceding claims, characterized in that the slide (39) carries a pin (38) which is guided within a vertically and linearly, together with the screw unit (4) lowerable control bar (36).

20. Device according to one of the preceding claims, characterized in that the control bar (36) on the centering block (9) is attached. 2 I .Device according to one of the preceding claims, characterized in that the screw unit (4) is arranged on a carriage (51) which can be moved vertically along a vertical rail (50).

22. Device according to one of the preceding claims, characterized in that the carriage (51) has the rail (50) including rollers (61, 61a, 62, 62a) on both sides.

23. Device according to one of the preceding claims, characterized in that the carriage (51) is supported on a gas pressure spring (52) aligned parallel to the lifting sleeve (6, 7).

24. Device according to one of the preceding claims, characterized in that a drive roller (67) is arranged on the housing (2).

25. Device according to one of the preceding claims, characterized in that the running surface (68) of the castor (67) lies above the support edge (14) of the underside of the housing.

26. Device according to one of the preceding claims, characterized in that the centering block (9) has a substantially cuboid shape.

27. Device according to one of the preceding claims, characterized in that the centering block (9) of the holding device (34) is bell-shaped.

28. Device according to one of the preceding claims, characterized in that the centering block (9) has a concave, inwardly directed curvature (165) on its underside (162).

29. Device according to one of the preceding claims, characterized in that the centering block (9) has long sides (166, 167) on which edge strips (170, 171) projecting beyond the concave curvature (165) are formed.

30. Device according to one of the preceding claims, characterized in that the edge strips (170, 171) each have an arcuate incision (168, 169).

31. Device according to one of the preceding claims, characterized in that the centering block (9) coaxial to the screw-in axis (3) is penetrated by a grommet (176) which protrudes over the sole (180) of the concave curvature (165).

32. Device according to one of the preceding claims, characterized in that the fork arms (18, 19) of the gripper (5) each have a stepped shoulder (150, 151) on their parallel adjacent walls, which interlock in the closed position of the gripper (5) and the fork arms (18, 19) each have a keyway (154, 155) on their parallel adjacent walls.

33. Device according to one of the preceding claims, characterized in that the fork arms (18, 19) of the gripper (5) each consist of a clamping jaw (143, 144) and a joint plate (145, 146), each joint plate (145, 146) being orthogonal to the respective one

Clamping jaw (143, 144) is arranged.

34. Device according to one of the preceding claims, characterized in that the fork arms (18, 19) of the gripper (5) on the rear sides of their link plates (145, 146) each have a longitudinal axis (23,24) of the respective fork arm (18,19) extending pin (92,93), which is rotatable about the respective longitudinal axis (23,24).

35. Device according to one of the preceding claims, characterized in that the ejection end (32) of the magazine (35) is formed from two largely Z-shaped fingers (133, 134) which have a slide (148, 149) directed against the gripper (5) .

36. Device according to one of the preceding claims, characterized in that at least one of the fingers (133, 134) is arranged on the magazine (35) so as to be foldable or pivotable.

37. Device according to one of the preceding claims, characterized in that the pivotable finger (134) on a spring-loaded ball inserted in the magazine (35) or the magazine wall

(140) sits on.

38. Device according to one of the preceding claims, characterized in that the handle (53) is at least foldable or pivotable.

39. Device according to one of the preceding claims, characterized in that the handle (53) is formed in two parts and at least one handle part (209, 210) is pivotally, foldably or pluggably arranged on the adjacent handle part.