EP0292604B1 - device for mechanically fastening roof sealing foils and insulating materials to roofs - Google Patents

Abstract

A method and corresponding apparatus accurately and efficiently fasten roofing materials to a roof. A first stroke of a piston both separates a single roofing screw from a roofing screw magazine and delivers it to a premounting position and separates a metal bracket from a metal bracket magazine and delivers it to a metal bracket premounting position. The second or return stroke places the screw and the metal bracket into respective mounting positions. A power screwdriver screws the screw through the metal bracket and the roofing materials placed on the roof and into the ceiling structure. The apparatus is mounted on a mobile frame to allow easy movement of the apparatus from fastening position to fastening position on the roof.

Description

The invention relates to a device for mechanically fastening roof sealing films and associated insulation materials on roofs.

Flat roofs of all kinds are covered with roof sealing foils and selected insulation materials.

Since the roofs are mostly large, manual laying techniques, which are subject to high work intensity, have proven to be unprofitable but also dangerous.

Conventional laying techniques are also qualitatively unfavorable with regard to the sealing properties, since the mounting elements used are not correctly inserted into the existing ceiling constructions.

From EP-A-0 003 004 is a device for screwing in screws with washers consisting of a feed shaft for the screws, an insertion path for the washers and a driven screwing device for gripping the screw head or for engaging the same, and wherein the detection means the screwing device are displaceable in the feed shaft.
The disadvantage of this known device is that only taped screws, similar to a cartridge belt, can be processed here.

This device makes the user dependent on the commercially available and very expensive taped screws.

From EP-A-39 949 a device for automatically feeding screws to the screw pin of a screwdriver, in particular a quick-action screwdriver, is known, in which loosely upstream screws are processed.
For the separation, this device uses separation pins that have to be passed through by the screws. However, it cannot be guaranteed with the described separation pins that two or three screws will slip due to gravity. In practical use, the screws lie close together and a clean, perfect separation is not possible.

The prior art shown also has the disadvantage that the parts to be screwed are fed during the downward stroke. The consequence of this is that a screw and a washer are already placed in a region of the short downward movement of the device, which can also happen due to unwanted actions or careless handling.
If the user has not recognized that a screw and a washer have been placed and they have not been screwed together, a pair of elements is placed again on the downward stroke and the device is blocked.

In contrast, the present invention has for its object to provide a device with which a rational workforce sparing and lowering labor intensity and safe work for the mechanical application and fastening of roof sealing foils and associated insulation materials of all kinds on roof surfaces is possible, while doing so in the prior art identified shortcomings and disadvantages eliminated.

According to the invention, these objects are achieved by the device according to claim 1.

A special embodiment of the device for mechanically fastening roof sealing foils and associated insulation materials on roofs, in particular on trapezoidal sheets or gas concrete and on flat roofs of all types, is characterized in that
that the device preferably has a mobile frame, on or in which the magazines for storing the loose metal holders and roof screws with their singles as well as feed and working elements are arranged,
that the separator of the metal holder has a rotatably mounted locking disk which sits diagonally on the base plate with an internal recess in size and shape of the metal holder, the geometric material thickness of the locking disk corresponding to that of the metal holder,
that the individual of the roof screws consists of a cam-controlled, preferably cylindrical, rotatably mounted roller provided with locking levers,
that the magazine of the metal holders preferably consists of corner holders arranged perpendicularly on the base plate by means of screws at an angle to the base plate axis,
that the magazine of the roof screws consists of screw tracks that are parallel to one another and inclined relative to the device axis, which lead into a screw track that runs at a downward gradient and leads to the cam-controlled locking lever roller.

Another particularly preferred embodiment of the device is characterized in that
that the supply of the metal holder is carried out in the assembly position via a lever-controlled slide, the levers controlling the slide on both sides being activated by vertical pressure force, while the levers are guided in two vertically and horizontally arranged grooves, and the slide is milled out within a longitudinally movable Move the rail, which thus rotates it with a time-delaying nose,
that the roofing screws are fed in via the lever of the cam-controlled roller which engages in the feeder device, in that the lever is pivoted into a release position by a lock,
that the locking lever roller has a vertically running curved groove, into which a nose arranged on the piston vertically movable in the pressure column engages, that the locking lever roller has a nose which engages in a curved groove arranged vertically movable in the pressure column,
that a guide sleeve centering the screwdriver is arranged vertically above the assembly end position of the metal holder and has a recess in the wall that allows the roof screw to enter the assembly end position,
that the pressure column provided with an internal spring is telescopically retractable into the housing, two handles extending transversely to the column axis and a retaining claw provided for fastening the screwdriver being arranged on the pressure column.

Another particularly preferred embodiment is characterized in that a spring block is arranged within the pressure column, which is connected by means of a dynamic spacer to the piston which can be moved vertically in the pressure column, the elongated hole provided in the spacer causing a time delay in the piston movement.

Another particularly preferred embodiment is characterized in that the telescopic part retractable within the pressure column has a slot-shaped recess on both sides.

Figur 1

einen Querschnitt der erfindungsgemäßen Vorrichtung;

Figur 2

eine Draufsicht der erfindungsgemäßen Vorrichtung;

Figur 3 bis 5

ein Detail der kurvengesteuerten Sperrhebelwalze mit Schraubenzuführung und Vereinzelner;

Figur 6 und 7

ein Detail des Metallhaltervereinzelners mit Zuführung;

Figur 8 und 9

Systemzeichnungen, die die Arbeitstakte des Verfahrens erläutern;

Figur 10

einen Querschnitt der Schiebersteuerung;

Figur 11

eine Draufsicht der Figur 10

Figur 12 bis 14

die Drucksäule in verschiedenen Arbeitspositionen.

With reference to the accompanying drawings, which show a particularly preferred embodiment of the invention, this will now be explained in more detail.
Show:

Figure 1

a cross section of the device according to the invention;

Figure 2

a plan view of the device according to the invention;

Figure 3 to 5

a detail of the cam-controlled locking lever roller with screw feed and singler;

Figures 6 and 7

a detail of the metal holder singler with feeder;

Figures 8 and 9

System drawings that explain the work cycles of the process;

Figure 10

a cross section of the slide control;

Figure 11

a plan view of Figure 10

Figure 12 to 14

the pressure column in different working positions.

Figures 1 and 2 show a cross section and a plan view of the device according to the invention.

The frame 1 of the device is preferably designed to be movable by a pair of wheels or rollers 2. Here, only one pair of wheels 2 in the area of the pressure column 3 has proven to be expedient, since the device is moved on these rollers by a slight tilting position and rests on the foot support 4 during assembly use. If necessary, the bottom surface of the foot piece 4 can be covered with a non-slip covering, for example with a rubber pad.

The device is operated as follows:
The roof screws 6 are filled into the screw magazine 5.
The metal holders 7 are also inserted into the magazine 8 provided for them.

Since the individual tracks 9 of the screw magazine 5 lead into a single track 10 arranged with a slope, a screw 6 is already in front of the locking lever roller 11.
At the start of installation, a "filling operation" is required, ie the operator presses the pressure column 3 to "A".

As a result, the piston 12 is also moved to "A". About the lever 13, the slider 14 is moved to "B" (dash-dotted position) and rotates by means of a driver the individual before 15 still oblique to the device axis of the metal holder 7 to "C", so that the recess 18 of the separator 15 with the Recess 17 of the base plate 16 is congruent.

The metal holder 7, the material thickness of which corresponds to that of the separator 15, now falls through both recesses 17 and 18 in the base plate 16 and the separator 15, which recesses are formed in accordance with their geometric shape.

A special feature of the invention is that only a metal holder is presented - therefore singular - this will be discussed in more detail in Figures 6 and 7.

After pressing the pressure column 3 to "A", the metal holder 7 lies in front of the slide 14 which is pulled backwards. The locking lever roller 11 was also pivoted to "D" when the lower point of the pressure column 3 was reached, so that a screw 6 was placed in front.

If the force applied to "A" ceases, the pressure column 3 is moved to "B" by a spring. Here, the slide 14 is again moved into its starting position via the lever 13 and thereby guides the metal holder 7 in the assembly position. The work cycles are coordinated with one another with a time delay so that the locking lever roller 11 pivots to "E" only after the metal holder 7 has reached the assembly end position and presses the screw 6 into the guide sleeve 19 of the screwdriver 20.

The pressure column 3 has reached its uppermost point at this time.

The following work cycles are analogous to those previously described, but now when pressing the pressure column 3 to "A", a combination of holder 7 and roof screw 6 is installed, i.e. the screwdriver 20 screwed the parts into the ceiling structure during this work cycle.

FIGS. 3 to 5 show a detail of the cam-controlled locking lever roller 11.

The screws 6 are on the screw track 10 on the Template 21 on. The nose 22 guided in the pressure column 3 passes during the vertical movement to "A", the curve 23 present in the locking lever roller 11, the locking lever roller 11 rotating by "P" to "D" and the locking lever 24 out of the recesses 25 of the locking lever roller 11 pivot and release the path of the screws 6 in the notch 26.

If the stroke is carried out to "B", the locking levers pivot to "E" and put the screws 6 through the opening 27 of the guide sleeve 19 into the final assembly position, where it is located above the metal holder that has already been inserted, and is inserted into the ceiling structure using a screwdriver.

Figures 6 and 7 show a detail of the metal holder separator.

The metal holders 7 are stacked one above the other in the magazine 8, the axis Z of which is arranged obliquely to the device axis X. This has the consequence that the metal holder can not fall through the recess 17 of the base plate 16, which has the shape of the metal holder.

The separator 15, which is rotatably mounted about the center "Y" of the base plate 16, lies in a recess 28 in the base slot 16. The geometric material thickness of the recess 28, the separator 15 and the metal holder 7 are congruent, so that a metal holder has the same area in the recess 18 of the recess Separate concerns. If the singler is rotated to "C" as described at the beginning, the recess 17 of the base plate 16, the recess 18 of the singler 15 and a metal holder 7 are placed congruently one above the other, while all other metal holders in the magazine are held obliquely in the Z axis, so that only a metal holder falls through all the recesses in front of the slide 14.
At the corresponding work cycle, the metal holder is pushed into the assembly end position according to "F".

Figure 8 shows the operations when the pressure column moves downward.

Point A is the starting position at which the pressure column is in its upper point when not actuated.

Slider, (S), metal holder single (M) and locking lever roller (W) are in rest position I.

When the pressure column reaches position "B", the slide is moved.
Metal holder singler (M) and locking lever roller (W) remain in their positions.

When the pressure column reaches position C, the singler swivels in the "X" axis. A metal holder falls in front of the slider. The slide and locking lever roller remain in their current position. When the pressure column reaches point D, the locking lever roller swings to "i" and releases the screw from "K" to "L".
The time delay which causes the slide function is explained in more detail in FIGS. 10 and 11.

Figure 9 shows the working movement of the pressure column upwards. After reaching point "E", the slide moves back and places a metal holder in the assembly end position. Separator (M) and locking lever roller (W) hold their position.
Point F moves the locking lever roller to "h" and sets the screws in the assembly end position "M".
Point G corresponds to the starting point A and rotates the singler in its axis "Z".

After a further downward movement of the pressure column, the work cycles described are repeated, the screwdriver introducing the parts in the final assembly position into the ceiling structure.

Figures 10 and 11 illustrate the procedure of the time delay due to the slide movement. The slide 14 is moved via the lever 13 to "x". The slide 14 guides a rail 30 within a recess 29.

As soon as the slide 14 strikes the inside 31 of the rail 30, it moves it to "y". The nose 32 arranged on the rail engages in a recess 33 of the separator provided specifically for this purpose and rotates it in the form already described. The time delay is caused by the free movement of the slide 14 between the inner sides 31 (31 a) of the rail 30.

Figures 12 to 14 show the pressure column 3 in different working positions. A spring block 34, against which the spring 35 presses, is arranged within the pressure column 3. A dynamic spacer 36 connects that within the pressure column telescopic part 37 with the pistons 12. If the telescopic part 37 provided with recesses 39 is retracted to "A", the piston is moved vertically downward with a time delay. The time delay is caused by the elongated hole 38 arranged in the spacer.

The proposed device represents a method of operation that processes the sealing film efficiently.

Reference symbol list

1

frame

2nd

Pair of wheels

3rd

Pressure column

4th

Footrests

5

Screw magazine

6

Roof screws

7

Metal holder

8th

Metal holder magazine

9

Single tracks of the screw magazine

10th

Single track with a slope

11

Locking lever roller

12

piston

13

lever

14

Slider

15

Isolated

16

Base plate

17th

Cut-out in the base plate

18th

Cut-out of the separator

19th

Guide sleeve

20th

Screwdriver

21

template

22

Nose on the piston

23

Curve

24th

Locking lever

25th

Cutouts in the locking lever roller

26

notch

27th

opening

28

Screwing

29

Recess

30th

rail

31

Inside of the rail

32

Nose on the rail

33

Recess in the singular

34

Feather blockade

35

feather

36

dynamic spacer

37

Telescopic part

38

Long hole

39

Recess in the telescopic part

Claims (14)

1. An apparatus for mechanically fastening roof sealing sheets and associated insulating materials to roofs, in particular to trapezium-shaped plates or to gas concrete and to flat roofs of all types, with which the sheet and the insulating materials are connected to the foundation by means of loose previously stored metal clips (7) and roofing screws (6) by machine, mechanically in a secure manner by means of a screwdriver (20), wherein the metal clips (7) and roofing screws (6) pass through respective separators whose operating cyles are synchronised with one another, characterised in that firstly in each case a metal clip (7) and a roofing screw (6) are presented and then, after the screwdriver (20) has reached bottom dead centre, the metal clip (7) and the roofing screw (6) are guided into the final fitting position during the upward stroke of this screwdriver, while the feeding of further metal clips (7) and roofing screws (6) is blocked, and at the end of each fitting operation a further combination, comprising one metal clip (7) and one roofing screw (6), is presented ready for fitting.
2. An apparatus according to Claim 1, characterised in that the apparatus preferably has a mobile frame (1), on or in which the magazines (8) and (9/10) are disposed for storing the loose metal clips (7) and roofing screws (6) with their separators and feed and operating elements.
3. An apparatus according to Claims 1 and 2, characterised in that the separator (15) of the metal clips (7) has a rotatably mounted locking disc which is mounted inclined to the base plate (16) and which has an internal recess (18) of the size and shape of the metal clips (7), the geometrical material thickness of the locking disc corresponding to that of the metal clips (7).
4. An apparatus according to Claims 1 to 3, characterised in that the separator of the roofing screws (6) comprises a cam-controlled, preferably cylindrical rotatably mounted roller (11) which is provided with locking levers (24).
5. An apparatus according to Claims 1 to 4, characterised in that the magazine (8) for the metal clips (7) preferably comprises corner supports vertical to the base plate (16) and mounted by means of screws at an angle to the base plate axis.
6. An apparatus according to Claims 1 to 5, characterised in that the magazine (5) of the roofing screws (6) comprises screw paths (9) arranged parallel side by side and inclined relative to the axis of the apparatus, which screw paths lead into a sloping screw path (10) leading to the cam-controlled locking lever roller (11).
7. An apparatus according to Claims 1 to 6, characterised in that the feed of the metal clips (7) into the fitting position is effected via a lever-controlled slide member (14), wherein the levers (13) controlling the slide member (14) on both sides are actuated by a vertically directed pressure, they are directionally guided in two vertically and horizontally arranged grooves, and they move the slide member (14) within a longitudinally displaceable milled-out rail (30) which via a projection (32) engaging in the separator (15) causes the latter to rotate after a time delay.
8. An apparatus according to Claims 1 to 7, characterised in that the feed of the roofing screws (6) is effected via the levers (24) of the cam-controlled roller (11) engaging in the apparatus of the feed, the roller being pivoted from a locking position into a release position.
9. An apparatus according to Claims 1 to 8, characterised in that the locking-lever roller (11) has a vertically extending cam-shaped groove (23) in which there engages a projection (22) mounted on the piston (12) which is vertically movable in the pressure column (3).
10. An apparatus according to Claims 1 to 8, characterised in that the locking-lever roller (11) has a projection which engages in a cam-shaped groove disposed vertically movably in the pressure column (3).
11. An apparatus according to Claims 1 to 10, characterised in that a guide sleeve (19) is disposed vertically above the final fitting position of the metal clips (7), which guide sleeve centres the screwdriver (20) and has a recess (27) in its wall admitting the roofing screws (6) into the final fitting position.
12. An apparatus according to Claims 1 to 11, characterised in that the pressure column (3) provided with an internal spring (35) can be retracted telescopically into the housing, two handles extending transversely to the column axis and a retaining claw provided for securing the screwdriver (20) being mounted on the pressure column (3).
13. An apparatus according to Claims 1 to 12, characterised in that a spring abutment (34) is disposed inside the pressure column (3) and by means of dynamic spacers (36) is connected to the piston (12) which is vertically movable in the pressure column (3), the slot (38) provided in the spacer (36) inducing a time delay in the piston movement.
14. An apparatus according to Claims 1 to 13, characterised in that the telescopic part (37), which can retract inside the pressure column (3), has on both sides a slot-like recess (39).

Images