DE202013004715U1 - Centering attachment for setting cavity dowels and blind rivet nuts - Google Patents

Abstract

Centering attachment (21) for setting cavity dowels (41a) and blind rivet nuts (41) on attachment walls or hollow chamber elements, each having a collar (43, 43a), an internally threaded shank (42) extending below the collar (43, 43a) ) and the shaft (42) have a preferably located above the thread (46) compression zone (48), wherein in the cavity dowel (41a) or the blind rivet nut (41) a fastener (65, 66, 67) screwed or driven is characterized in that the centering attachment (21) has a bed (23) which essentially accommodates the collar (43, 43a) of the cavity plug (41a) or the blind rivet nut (41) and which corresponds substantially to the geometry of the respective collar.

Description

The invention relates to a centering attachment for setting cavity dowels and blind rivet nuts according to the preamble of claim 1.

In particular, in the attachment of objects to superior walls or hollow chamber elements, the problem is that the attached objects can solve because the mounting means is not anchored lack of solid material with the appropriate holding force on the wall or in the corresponding component. The attachment of a cavity dowel or a blind rivet nuts on or in the wall or the respective component require a certain craftsmanship, otherwise the blind rivet nut or the cavity dowel sits obliquely in the wall and jammed. This in turn means that z. B. an aufhängendes to two mounting sites image can not be aligned exactly. To correct the position of the image, then usually introduced into the cavity dowel screw is bent, resulting in a loosening of the cavity dowel.

For the installation of special dowels or blind rivet nuts special tools are usually used, which lead by acting axially on these parts pulling movement to the hollow chamber element engaging behind deformation of the dowel or blind rivet nut. Other deformation steps often lead to improper anchoring. If z. B. the tensile forces acting on the deformable portions of the dowels or rivets do not flow vertically, there is an inclination or tilting.

Accordingly, it is an object of the invention to propose a mounting kit for attachment of objects on intent walls, with an optimal and tilt-free, as well as positionally accurate mounting of cavity dowel and blind rivet nuts is possible.

This object is achieved by a mounting kit with the features of the proposed claim 1.

Further features of the invention are described in the subclaims.

According to the invention, a centering attachment is proposed for setting cavity dowels and blind rivet nuts on attachment walls or hollow chamber elements, each having a collar, an internally threaded shank extending below the collar, and the shank having a compression zone preferably above the thread, wherein a fastening element is provided in the cavity dowel can be screwed in or driven in.

The centering attachment according to the invention is characterized in that it has a bed which accommodates the collar of the cavity plug and essentially corresponds to the geometry of the collar of the cavity plug.

The advantages of the invention are characterized in that after introduction of a mounting hole in a component in which the cavity dowel or blind rivet nut is mounted, the cavity dowel or blind rivet nut can be turned onto a screw inserted in the screw insert without deformation, which in each case with its collar to come to rest in a bed of arranged on the screw centering attachment and are introduced into the prepared mounting hole in the component, the centering rests with its underside on or on the component and the coaxial with the mounting axis cavity dowel or blind rivet nut, the centering and Align screw insert orthogonal to the component and by activating the tightening direction of the screwdriver during the screwing movement of the shaft of the cavity dowel or blind rivet nut under compression and formation of a closed bead, star or knot in the area I the compression zone to the bottom, to the inner wall of the cavity or back of the component, eg. B. a front wall, is pressed. The cavity dowel or blind rivet nut does not necessarily have to be screwed onto the screw insert before it is inserted into the mounting hole. They can also be inserted into the mounting hole first and then the screwdriver can be attached.

The invention makes it possible to use either a screw with a threaded pin, which engages in the internal thread of the cavity dowel and thereby causes the permanent Dübelverformung, or alternatively screwdriver bits or Schraubernüsse for the rotary handle on screw heads with Phillips or hexagon head of each pre-assembled in the cavity dowel or blind rivet nut Insert fastener. If the fastener is already pre-assembled, the centering attachment between the screw head of the fastener and the collar of the cavity dowel or blind rivet nut is used. After installation, the centering attachment is removed, which requires that the compression remains deformed when loosening the fastener.

With the invention is further achieved that the collar and thus the entire cavity dowel or the blind rivet nut during assembly can not escape from the mounting axis and the screw axis, because the centering spatially provides no possibility for this purpose. The depth of the Bed corresponds to the collar height of the cavity dowel or blind rivet nut.

This is supported by the fact that the bed of the centering attachment is surrounded by a support surface. With this bearing surface of the centering attachment forms with the component in which the cavity dowel or blind rivet nut is mounted, a parallelism. This results almost automatically a vertical orientation of the used screwdriver, without the user could commit a mounting error here.

The result of the assembly process is an exact attachment, in which the dowel or rivet axis is aligned coaxially to the mounting axis. Alone by the screwing the assembly process is performed in cooperation with the back pressure of the centering attachment. By counteracting the centering attachment of the cavity dowel or the blind rivet nut is prevented from turning with the threaded pin of the screw. After the threaded pin of the threaded insert has passed through the thread of the cavity dowel or the blind rivet nut, the shaft is pressed upwards during the continuing rotational movement of the screw insert, wherein the centering attachment and thus the cavity dowel or blind rivet nut do not rotate. The fact that is achieved with the invention that the cavity dowel and blind rivet nuts are completely inserted without jamming in the component, the thread can not be damaged. Mounting parts, which are the thread of the cavity dowel or the blind rivet nut for fixing, can be fixed with the correct orientation on the relevant component.

The assembly process can be done with the help of manual or mechanical tools. Preferably, an electric screwdriver is used as the tool, which is operated in the tightening direction of the cavity plug or the blind rivet nut. The tightening direction of the cavity plug and the blind rivet nut is to be understood as the direction in which it is pressed against the underside or rear side of the component by compression and formation of a bead in the area of the compression zone. Depending on the application, cavity dowels or blind rivet nuts with right- or left-hand thread can be used here. Accordingly, the device used, if necessary, a cordless screwdriver z. B., operated with clockwise or a manual tool used by left or right rotation accordingly.

The invention is particularly suitable in combination with a Handakkuschrauber and can be used almost at all workstations. The assembly process can be carried out in a few seconds and requires no effort. After completion of the assembly process, the screwdriver by reverse rotation, z. B. removed by left-hand rotation of the cavity dowel or blind rivet nut. Even if the fitter does not align the helicopter exactly, this is urged by the support surface of the centering attachment perpendicular or orthogonal to the component to be machined.

Screw insert and centering attachment may be formed as a component, but are freely rotatably assembled against each other, or even, as a particularly preferred embodiment of the invention provides, be designed so that the centering attachment is placed on the screw and each penetrated by the threaded pin. As a result, the centering attachment does not rotate with it.

Alternatively, the centering attachment can also be adapted to the screw insert by means of a bearing, preferably a ball bearing, which has a positive effect on the work because of the resulting counterforce control.

A particularly preferred embodiment of the invention provides that the screw with threaded pin and Zentriervorsatz are designed as interchangeable modules. This allows various sizes of cavity dowels and blind rivet nuts, according to the subsequent load influences, are used and they are processed by simply replacing the appropriate tool modules.

In order to prevent rotation of the centering attachment during the assembly process, the invention provides in a particularly preferred embodiment, that the centering attachment has a tool attack. As a result, the centering attachment can be secured against rotation with a ring wrench, which the user holds in place during the assembly process. A handle knob arranged on the centering attachment can alternatively be used for this purpose.

The later usable fastener has a threaded shank, by means of which it is screwed into the already secured in the component cavity dowel or blind rivet nut. The headboard located at the free end may be formed as a ring, eyelet or hook to mount objects thereon.

There are various possibilities for designing and developing the teaching of the present invention in an advantageous manner. For this purpose, on the one hand to refer to the subordinate claims and on the other hand to the following explanation of an embodiment of the invention with reference to the drawings. In conjunction with the Explanation of the preferred embodiment of the invention with reference to the drawing, also generally preferred embodiments and developments of the teaching are explained.

The invention will be described below with reference to the drawings with reference to a preferred embodiment.

In the drawings show:

1 the Zentriervorsatz invention together with a mounting kit with its individual components in an exploded view,

2 a perspective view of a blind rivet nut,

3 a side view of the blind rivet nut according to 2 in a half section,

4 a screw insert,

5 a side view of an intermediate ring,

6 a top view of the intermediate ring,

7 a bottom view of the intermediate ring,

8th a side view of the centering attachment,

9 a bottom view of the centering attachment,

10 the centering attachment with inserted blind rivet nut,

11 the centering attachment according to the invention in assembled situation with the assembly kit parts in use,

12 this in 11 with XII marked detail in an enlargement,

13 the blind rivet nut in installed condition,

14 the ball-bearing centering attachment with a handle knob instead of a tool attack,

15 a further example of use of the invention together with individual components in an exploded view,

16 the beginning of assembly situation of the variant 15 .

17 an intermediate installation step of the variant according to 15 and 16 .

18 the final assembly situation of the variant 15 - 17 .

19 a further application of the invention together with individual components in an exploded view with parts as in the variant according to 15 - 18 but using the threaded insert with threaded pin,

20 the fastener to be used later,

21 an intermediate installation step of the variant according to 19 and 20 .

22 the final assembly situation of the variant 19 - 21 and

23 a transport case with Miontage aids.

1 shows the invention with spaced apart individual elements. With 1 is a hand screwdriver with a chuck 2 designated. A screwdriver bit 4 , which is suitable in the chuck 2 the hand-wrench 1 to be used, follow an intermediate ring 11 , a centering attachment 21 and the blind rivet nut to be processed 41 ,

In 2 and 3 is the blind rivet nut 41 displayed. This has a shaft 42 and a collar 43 , The shaft 42 and the collar 43 are from a channel 44 interspersed, the near the collar 43 in a widened area 45 passes. The narrower channel area underneath is with an internal thread 46 designed. The one between the collar-close end 47 of the thread and the collar 43 lying thread-free section forms a compression zone 48 ,

In 4 is a screwdriver 4 displayed. The screw insert 4 is a pin with a cylindrical approach 5 which is inserted into the chuck's chuck. At its opposite free end has the screw 4 a grub screw 6 , The external thread on it 7 corresponds to the size of the internal thread of the blind rivet nut to be processed and has at the transition to the pen body a thread-free section 8th on.

The in the 5 - 7 pictured intermediate ring 11 serves as a spacer between centering attachment 21 and screw insert 4 , The intermediate ring 11 can also be designed as a sliding or roller bearings and connected to the centering attachment. He serves the trouble-free rotation of the screwdriver bit 4 opposite the static centering attachment 21 , The intermediate ring 11 includes a cone-shaped disc 12 in a cylindrical approach 13 passes. disc 12 and approach 13 are from a circular cylindrical bore 14 interspersed.

The in 8th - 10 pictured centering attachment 21 has a bed on its underside 23 in which the collar 43 the cavity dowel or the blind rivet nut 41 to come to rest. The centering attachment 21 is from a central hole 22 interspersed. The bed 23 is from a plane bearing surface 24 surround. To prevent co-rotation during the assembly process, has the centering attachment 21 on its outer contour a tool attack 26 to set, for example, with a ring spanner. Alternatively, a handle knob 28 ( 14 ).

The assembly of the blind rivet nut or cavity dowel 41 on or on a designated component is in the 11 - 13 resist given. For this purpose, the screw is used 4 with its cylindrical approach 5 in the chuck 2 the hand-wrench 1 used and rotatably enclosed. After the intermediate ring 11 and the centering attachment 21 with his bed 23 from the hand screwdriver 1 pointing the way to the threaded pin 6 of the screw insert 4 are manually attached, the blind rivet nut or cavity dowel 41 on the grub screw 6 by carefully turning the wrench with clockwise rotation. If the cavity dowel or blind rivet nut 41 with the collar 43 correct in centering attachment 21 is sitting, the so prepared apparatus on the with 30 designated plate placed in the already a the diameter of the dowel or rivet shank corresponding opening 32 is provided. The plate is representative of all components, eg. B. also shown a intent wall.

The centering attachment 21 now sits with his support surface 24 plan on the plate 30 so that the assembly process in an exact orthogonal relationship, ie including a right angle between plate 30 and screw axis 35 he follows.

With a tool, preferably a fork wrench, the centering attachment 21 secured against turning. After the grub screw 6 of the screw insert 4 the internal thread 46 the blind rivet nut 41 has passed through, this is against the vertex 25 ( 8th ) of the bed 23 pulled while the shaft 42 compressed. Through the thread-free compression zone 48 ( 3 ) remains the internal thread 46 even undeformed, so that the grub screw 6 Turn in here and after the blind rivet nut 41 through the formation of a bead 49 ( 13 ) firmly on the plate 30 has anchored, by counterclockwise rotation of the threaded pin takes place.

The invention prevents rotation of the blind rivet nut or cavity plug caused by the frictional engagement force, such that the thread of the screw insert can work through the threads of the parts and subject them to axial movement solely by the screwing motion, thereby providing the crushing or compressing zone as a deliberate and controlled weak point shows which deforms into a bead.

The 14 shows in addition to the embodiment of the centering attachment 21 with a handle knob 28 a bearing instead of a tool attack 51 with the centering attachment 21 is arranged on the screw, resulting in an optimal balance of forces between axial and frictional force.

As a result, the invention achieves that the cavity dowel or the blind rivet nut is inserted into the component while retaining an exact orthogonal screw axis and that the internal thread in the cavity dowel or blind rivet nut remains unimpaired in its quality of use.

The 15 - 22 show the invention together with a mounting kit with a cavity dowel, as is commonly used for pressure-resistant plate materials with underlying cavity.

The 15 shows a cavity dowel 41a that with the screw 82 and the washer 81 that the fastener 67 form, is completed. The cavity plug is a commercially available component and has on the underside of his collar 43a protruding claws 83 in the plate material 85 (please refer 17 ) are pressed in before the actual assembly process begins with the material deformation of the dowel. Below the collar is the so-called compression zone 48 , at the end of which is an internal thread 46 followed.

16 shows that in an opening 32a of the plate material 85 ( 17 ) Inserted in the form of a bore cavity dowel 41a with pre-assembled screw 82 , The centering attachment 21 is between the washer 81 and screw head and the collar 43a used, with the collar in bed 23 of the centering attachment is added. The screw insert 4a in this embodiment is a cross-hatch bit with one in the head 72 the screw engaging rotary handle 71 that the fastener 67 directly into the cavity dowel rotates.

The 17 and 18 show the subsequent deformation situations of the cavity anchor. After the setting process, the screw is released and removed the centering attachment.

The 19 - 22 show the already in 15 - 18 used cavity dowels 41a and the fastener used therewith 67a , The setting process is done with a screw 4 performed and the fastener 66 only later turned. This is especially the case when the screw head is not suitable for a rotary drive.

The 23 shows a transport case 60 , Here are cavity dowels 41 . 41 ' . 41 '' . 41 ''' and 41a in different sizes. Further fasteners 65 . 65 ' . 65 '' . 66 . 66 ' . 66 '' and 67 in different designs and sizes. These can be as shown here eyebolts, hook bolts or differently designed headboards 69 be that with their threaded shank 68 be screwed into the cavity dowel.

With 4 . 4 ' and 4 '' are threaded inserts with different setscrews 6 for the different cavity dowels. Furthermore, a screwdriver 4a in the form of a Kreuzschlitzbits. Likewise, according to the variety of dowels a matching selection of centering attachments 21 . 21a . 21b and 21c in the transport case 60 maintained.

The fork wrench 70 serves to secure the Zentriervorsatzes against rotation, if no other aids attached to this. As a tool is in the case a hand screwdriver 1 with removable battery 75 and charger 77 ,

LIST OF REFERENCE NUMBERS

1

Handschrauber

2

Chuck of 1

4

screw insert

4a

screw insert

5

cyl. Approach of 4

6

Grub screw from 4

7

External thread on 6

8th

Thread free section of 6

11

intermediate ring

12

conical disk of 11

13

Approach of 11

14

Bore in 11

21

Zentriervorsatz

22

Bore in 21

23

Bed in 21

24

Bearing surface of 21

25

Vertex of 23

26

Tool attack on 21

28

handle knob

30

Part / plate

32

Breakthrough in 30

32a

Breakthrough in 85

35

screw axis

41

blind rivet nut

41a

hollow wall anchors

42

Shank of 41

43

Collar of 41

43a

Collar of 41a

44

channel from 41

45

expanded area of 44

46

Internal thread of 44

47

Threaded end of 46

48

Compression zone of 41

49

Bead of 41

51

bearing for 21

60

Carrying case

65

fastener

66

fastener

67

fastener

68

Threaded shaft of 65 . 66

69

Headboard of 65 . 66

70

end wrench

71

Rotary handle of 4a

72

screw head

75

removable battery

77

charger

81

Washer of 67

82

screw

83

Claw of 43a

85

board material

Claims (7)

Centering attachment ( 21 ) for setting cavity dowels ( 41a ) and blind rivet nuts ( 41 ) on header walls or hollow chamber elements, each having a collar ( 43 . 43a ), one below the collar ( 43 . 43a ) extending shaft ( 42 ) with internal thread ( 46 ) and the shaft ( 42 ) one preferably above the thread ( 46 ) located compression zone ( 48 ), wherein in the cavity dowel ( 41a ) or the blind rivet nut ( 41 ) a fastener ( 65 . 66 . 67 ) can be screwed or driven in, characterized in that the centering attachment ( 21 ) a collar ( 43 . 43a ) of the cavity plug ( 41a ) or the blind rivet nut ( 41 ) receiving substantially the geometry of the respective collar corresponding bed ( 23 ) having. Centering attachment according to claim 1, characterized in that this on the screw ( 4 ) and its threaded pin ( 6 ) is interspersed. Centering attachment according to claim 1, characterized in that this between the screw head ( 72 ) of the fastening element ( 67 ) and the collar ( 43a ) of the cavity plug ( 41a ) is used. Centering attachment according to one of the preceding claims, characterized in that the bed ( 23 ) of the centering attachment ( 21 ) from a support surface ( 24 ) is surrounded. Centering attachment according to one of the preceding claims, characterized in that the screw insert ( 4 ) with threaded pin ( 6 ) and centering attachment ( 21 ) are designed as interchangeable modules. Centering attachment according to one of the preceding claims, characterized in that the centering attachment ( 21 ) has a sliding or ball bearing, with which it on the screw ( 4 ) is adapted. Centering attachment according to one of the preceding claims, characterized in that the centering attachment ( 21 ) a tool attack ( 26 ) having.

Images