DE102007016484B4 - Detachable spreader clip for a clip connection of several components - Google Patents

Abstract

Detachable expansion clip for a clip connection of several components, comprising a sleeve-like body part (1) with expansion segments (4) and axially parallel free spaces (16) between them, a contact flange (3) and a continuous axial insertion opening (5) as a first part for a head (7) and an expanding shaft (6) formed expanding mandrel (2) as a second part, with insertion segments on the Spreizsegmenten (4) formed projections (8) each having a relative to the axis (A) of the insertion (5) inclined sliding surface (9) for radial spreading of the expansion segments (4) during insertion of the expansion shaft (6), and with guide means for axial guidance of the expanding mandrel (2) in the insertion opening (5), wherein as guide means in the expansion segments (4) each have a guide groove (10) and in each case a sliding projection (11) are arranged on the expansion shaft (6) for engagement in these (10), locking means (12) being provided on the expansion shaft (6) and on the expansion segments (4). 13, 14) are formed, which engage in a predetermined axial insertion position of the expanding mandrel (2) in the body part (1) in which the expansion segments (4) are spread to spread position, and wherein the latching connection formed thereby by rotation of the expanding mandrel (2) can be released into the free space (16) about the axis (A) of the insertion opening (5) and the expanding mandrel (2) is axially displaceable in the unlocked position in the body part (1), characterized in that on the respective expansion segment ( 4) einstecköffnungsseitig next to the guide groove (10) has a protruding latching lug (12) with a on the abutment flange (3) facing away from contact surface (13) and the expansion shaft (6) each one next to the sliding projection (11) with the latching lug (12 ) corresponding recessed latching projection (14) are formed for this, which are in the insertion position with each other, and in that the guide groove (10) in the insertion position with a to to the adjacent free space (16) extending annular gap (15) is connected, via which the sliding projection (11) with the latching projection (14) by rotation of the expanding mandrel (2) about the axis (A) of the insertion opening (5) in the free space ( 16) is detachable and the expanding mandrel (2) in the unlatched position in the body part (1) is axially displaceable.

Description

The invention relates to a releasable Spreizclip for a clip connection of several components together, which are provided at attachment points provided with mounting holes for the arrangement of such, in particular for connecting plates, interior trim parts or a headliner to body parts of different thickness in a vehicle.

Made of a hard elastic plastic (insertion) Spreizclips are well known. These are usually formed in two parts and have a sleeve-like body part with axial slots (free spaces) separated from each other Spreizsegmenten, an integrally formed abutment flange for resting against the plug-in direction component and a continuous central insertion for a spreader mandrel as the second part. The latter has a head for abutment against the abutment flange and an integrally formed on the head spreading, which is inserted into the insertion at least into the region of the expansion segments and this on the side facing away from the abutment flange on correspondingly shaped sliding surfaces radially so far elastically expands that the adjacent to each other and to be joined components in the axial (Spreizclip-) direction are fixed together, as in the GB 2 173 851 A , of the GB 2305 961 A and the DE 10 2004 024 088 A1 is described. The US 2004/0 020 016 A1 and the EP 1 081 394 A2 describe further spreading clips, which allow a prefixing of an expanding mandrel on the sleeve-like body part. In addition, from the said GB 2 305 961 A as well as from the US 6,196,756 B1 , of the US 2006/0 198 714 A1 and the US 6 045 309 A detachable spreading clips known. When releasable Spreizclip after the GB 2 305 961 A have the Spreizsegmente insertion opening side at its end remote from the abutment flange on a radially inwardly facing projection with a sliding surface. The spreader pin (spike) is formed from a head and a spreader shaft projecting vertically therefrom, which has projections each having a counter sliding surface corresponding to the respective sliding surface. In order to enable the absorption of shear forces, the shaft of the expanding mandrel is bend-stiffened by ribs formed in the axial direction, which are wider than the spreizdornendseitig near the head and the free spaces between the expansion segments in the hull near the flange and narrower at the free end of the hull are formed. With an axial displacement of the expanding mandrel in the fuselage in the direction of the fuselage end, the expansion segments are pressed radially outward with a corresponding expenditure of force. The US 6,196,756 B1 In contrast, describes a releasable expansion clip, in which the expanding mandrel is fixed axially in its locking position by means of flexible tabs of the body part. By a 90 ° rotation of the expanding mandrel about its longitudinal axis said tabs of the same are releasable and the expanding mandrel the sleeve-like body part axially removable. The US 6,196,756 B1 describes a releasable expansion clip with an expanding mandrel which is positionable within the body portion in a waiting position, a locking position and an unlocking position. The said locking and unlocking position of the expanding mandrel is allowed by a Spreizschaft same with rectangular cross-section and possibly rounded corners. The US 6 045 309 A describes a Spreizclip with a body part and with an expanding mandrel with oval expansion shaft, which is axially guided in grooves of the second expansion segments of the said body part. The expanding mandrel has lower barbs, which snap into the locking position of the Spreizclips behind lower ends of the expansion segments. By a rotation of the expanding mandrel, accompanied by an upward movement thereof, the barbs can be brought out of engagement with said lower ends of the expansion segments and into an axial clearance between the expansion segments.

It is an object of the invention to design a releasable Spreizclip for a clip connection of several components according to the preamble of claim 1 or according to the preamble of claim 8 alternatively and in such a way that it can be easily assembled and disassembled.

This object is achieved according to a first aspect of the invention in a Spreizclip according to the preamble of claim 1 by its characterizing features. Advantageous embodiments are listed in the subclaims.

The invention consists in that a two-part expansion clip of the above-described and known type, which has a body part with expansion segments and axially parallel free spaces between them and an insertion opening as the first part and an expanding mandrel for elastic spreading of the expansion segments as the second part, is designed such that on Spreading of the expanding mandrel, which causes the spreading of the expansion segments, and on the expansion segments of the body part locking means are formed, which engage in a predetermined axial insertion position of the expanding mandrel in the fuselage part in which the expansion segments are spread to a spread position, engage each other and set the two parts together , In this case, this insertion position of the expanding mandrel, in which the expansion segments are elastically spread and which is characterized by the latching of the same with the body part, at the same time defines the package thickness of the components to be joined together. The latching connection reliably secures the manufactured component connection. The axial impressions of the expanding mandrel in the Fuselage part formed latching connection is by a rotation of the expanding mandrel about the same axis and the insertion again releasably and axially displaceable, so that the spreading compound can be canceled and the Spreizclip is removable from the components. The Spreizclip is after removing the latching connection and the withdrawal from the expansion, connected to the moving back of the Spreizsegmente to its original position, removable from the adjacent components again. It is also advantageous that approximately the same low assembly force is required when pressing in the expanding mandrel until the beginning of the spreading. In this case, in each case a guide groove and the spreading shaft each have a sliding projection for engaging in this are arranged as a guide means in the expansion segments. As latching means are on the respective spreading segment einstecköffnungsseitig arranged and projecting locking lug with a formed on the abutment flange of the fuselage side abutment surface and formed on a spread and formed with the locking lug and thereby reset latching projection, which is in particular formed on the sliding projection next to this, provided. These locking means are in the insertion position with each other and prevent sliding back of the expanding mandrel in the insertion, connected to a release of the expansion. In the region of the sliding projection positioned in the guide groove by the latching connection, the latter is connected to an annular gap extending up to the adjacent free space of the respective expansion segment, via which the sliding projection and the latching projection can be rotated into the free space by rotating the expanding mandrel and these and thus also the expanding mandrel in FIG Hull part are displaceable.

The expansion segments forming the body part, preferably three expansion segments arranged equidistant from one another on the abutment flange, may be provided on the outside with crush ribs which serve to compensate for tolerances and may each have an insertion foot on the side facing away from the abutment flange. This is anlageflanschseitig radially against the shank or the crush ribs and thus forms a slipping out of the fuselage portion of the mounting hole preventing Fangstufe and is also on the side facing away from the abutment flange konussegmentförmig, together with the other in this way beveled Einführfüßen Einammerleichterung to accomplish.

The abutment flange can be provided with a radially arranged trough-like depression for receiving a radially formed on the head of the expanding mandrel bulge, which engage positively in the connecting / spreading position of the spreader clip and prevent unwanted rotation of the expanding mandrel in the body part. To release the expanding mandrel whose head is expediently provided with a centrally located receptacle for a tool engagement, in particular with a hexalobular. When rotating the expanding mandrel in the fuselage part by means of a tool through which the latch is released, the head is lifted by unscrewing the bulge from the recess in the contact flange and can be relieved under attack to pull the expanding mandrel from the Aufspreizbereich to the contact flange of the body part , wherein the projections formed on the expanding mandrel slide in the free spaces formed between the expansion segments. A complete extraction of the expanding mandrel from the body part is not intended.

When reusing the Spreizclips the expanding mandrel, the projections are in the open spaces pressed until the bulge on the abutment flange in the body part and then screwed into the Verrastungsposition.

It is also advantageous that the two parts of the Spreizclips are produced in an injection mold and thereby arranged axially to each other and can be connected to each other by a predetermined breaking connection. This results in a Spreizclip whose parts are arranged captive to Verbauau each other. When shoring this Spreizclip is spent in the corresponding arrangement opening and then the predetermined breaking point is destroyed by pressure on the expanding mandrel and the expanding mandrel pressed into the body part.

According to a second aspect of the invention, this object is achieved in a Spreizclip according to the preamble of claim 8 by its characterizing features. Advantageous embodiments are listed in the subclaims.

According to this second aspect of the invention, the expanding mandrel and the body part are arranged in the unassembled and unmated condition by a predetermined breaking connection to each other. This results in a Spreizclip whose parts are arranged captive to Verbauau each other. When shoring this Spreizclip is spent in the corresponding arrangement opening and then the predetermined breaking point is destroyed by pressure on the expanding mandrel and the expanding mandrel pressed into the body part.

The invention will be explained below with reference to an embodiment. In the accompanying drawings show:

1a and 1b : a perspective view of a Spreizclips formed from a body part and an expanding mandrel,

2 : the body part in a further perspective view,

3a and 3b : the two parts of the expansion clip in a side view,

3c : a top view of the head of the expanding mandrel,

4a and 4c : the two parts of the expansion clip in an axial section,

4b : the bottom view of the expanding mandrel,

4d : the top view of the fuselage part and

5a and 5b : projections arranged on the expanding mandrel.

The in 1a and b and 2 Spreizclip shown has a body part 1 and in this plug-in expanding mandrel 2 on. The body part 1 consists of an abutment flange 3 and three at the same distance on this molded Spreizsegmenten 4 holding an insertion opening 5 for the expanding mandrel 2 enclose, and the expanding mandrel 2 from one into the insertion opening 5 plug-in spreader shaft 6 and a head formed on it 7 , At the expansion segments 4 is in each case in the last third of the insertion 5 on the abutment flange 3 opposite side a projection 8th with respect to the axis A of the insertion 5 inclined sliding surface 9 for the radial spreading of the same ( 4 ) by the spreading shaft 6 formed. For axial guidance of the expanding mandrel 2 in the insertion opening 5 is in the expansion segments 4 one guide groove each 10 for one at the spread shaft 6 on the head 7 opposite side molded sliding projection 11 educated. Furthermore, at the respective expansion segment 4 Einstecköffnungsseitig a protruding latch 12 with one on the abutment flange 3 opposite side trained contact surface 13 and at the spreader shaft 6 one next to the respective sliding projection 11 molded and with the catch 12 corresponding recessed latching projection 14 for this ( 12 ) arranged in the predetermined insertion position of the expanding mandrel 2 in which the expansion segments 4 are spread apart for spreading, interlock.

The at the expansion segments 4 each trained guide groove 10 is with an annular gap 15 connected in the opposite to the adjacent expansion segment 4 trained free space 16 empties. This annular gap 15 allows twisting of the expanding mandrel 2 in the fuselage 1 about the axis A, through which the locking projection 14 out of engagement with the latch 12 is brought and this and the sliding projection 11 in the open space 16 reach. In this position, the expanding mandrel 2 until it abuts against the abutment flange 3 from the body part 1 pulled and thereby the Spreizverbindung be solved.

The expansion segments 4 are each free space side with axis-parallel crush ribs 17 provided and have on the investment flange 3 opposite side each with an insertion 18 provided after the free end of the respective expansion segment 4 is formed cone-shaped and opposite the Spreizsegmentschaft and the crush ribs 17 protrudes radially. On the spreading segments 4 opposite side is the abutment flange 3 with a radially arranged trough-like depression 19 for one at the head 7 of the expanding mandrel 2 formed bulge 20 provided (also 4c and 4d ), which in at the fuselage part 1 inserted expanding mandrel 2 mesh.

3a and b show the two parts 1 and 2 the Spreizclips for clarity in a side view, and 3c lets the training of a centrally arranged hexalobular 21 for the engagement of a tool for rotating the expanding mandrel 2 and releasing it from the expansion segments 4 detect. The maximum packing height P of the components or material layers to be connected to one another and arranged on one another is determined by the distance of the insertion foot 18 from the abutment flange 3 certainly.

In the 4a and 4b and enlarged in the 5a and 5b are the arrangement of the sliding and locking projections 11 and 14 and in the 4c and 4d the guide grooves 10 , the latching noses 12 and the sliding surfaces 9 clarified. In the 4a and 4b it can be seen that the respective locking projection 14 opposite the circumference of the spreading shaft 6 is reset and flush with this completes and on a slope 22 is formed, with the slope of the locking lug 12 corresponds.

Will now be the expanding mandrel 2 with the spreading shaft 6 in the insertion opening 5 inserted, wherein the sliding projections 11 in the axial direction in the guide grooves 10 slide along, the sliding surfaces 9 through the spread shaft 6 to the outside and the expansion segments 4 pressed against the material layers. At the same time reach the locking projections 14 under the locking lugs 12 and secure the Aufspreizstellung the expansion segments 4 , The release of the expanding mandrel 2 from this detent position takes place by a rotation of the same, through which the projections 11 and 12 over the annular gaps 15 into the open spaces 16 arrive and the expanding mandrel 2 up to the abutment flange 3 from the body part 1 can be pulled.

LIST OF REFERENCE NUMBERS

1

body part

2

expanding mandrel

3

abutment

4

spacer segment

5

insertion

6

Spreizschaft

7

head

8th

head Start

9

sliding surface

10

guide

11

slide projection

12

locking lug

13

contact surface

14

catch projection

15

annular gap

16

free space

17

squeezing

18

Einführfuß

19

deepening

20

upheaval

21

Hexalobular

22

slope

A

axis

P

packing density

Claims (13)

Detachable expansion clip for a clip connection of several components, with a sleeve-like body part ( 1 ) with spreading segments ( 4 ) and paraxial spaces ( 16 ) between them, an abutment flange ( 3 ) and a continuous axial insertion opening ( 5 ) as the first part for one out of a head ( 7 ) and a spread ( 6 ) formed expanding mandrel ( 2 ) as a second part, with at the Spreizsegmenten ( 4 ) Einstecköffnungsseitig formed projections ( 8th ) with one each with respect to the axis (A) of the insertion opening ( 5 ) inclined sliding surface ( 9 ) for the radial spreading of the expansion segments ( 4 ) when inserting the expanding shaft ( 6 ), and with guide means for the axial guidance of the expanding mandrel ( 2 ) in the insertion opening ( 5 ), wherein as a guide means in the expansion segments ( 4 ) each have a guide groove ( 10 ) and at the spreading shaft ( 6 ) each have a sliding projection ( 11 ) for engaging in this ( 10 ) are arranged, wherein the spread ( 6 ) and at the spreading segments ( 4 ) Locking means ( 12 / 13 . 14 ) are formed in a predetermined axial insertion position of the expanding mandrel ( 2 ) in the fuselage part ( 1 ) in which the expansion segments ( 4 ) are spread apart for spreading, interlock, and wherein the latching connection formed thereby by a rotation of the expanding mandrel ( 2 ) about the axis (A) of the insertion opening ( 5 ) into the open space ( 16 ) is detachable and the expanding mandrel ( 2 ) in the unlatched position in the fuselage part ( 1 ) is axially displaceable, characterized in that on the respective expansion segment ( 4 ) Einstecköffnungsseitig next to the guide groove ( 10 ) a protruding latch ( 12 ) with one on the abutment flange ( 3 ) opposite side trained contact surface ( 13 ) and at the spreading shaft ( 6 ) one each beside the sliding projection ( 11 ) with the latch ( 12 ) corresponding recessed locking projection ( 14 ) are formed for this, which are in the insertion position engaged with each other, and that the guide groove ( 10 ) in the insertion position with one to the adjacent free space ( 16 ) extended annular gap ( 15 ), over which the sliding projection ( 11 ) with the latching projection ( 14 ) by a rotation of the expanding mandrel ( 2 ) about the axis (A) of the insertion opening ( 5 ) into the open space ( 16 ) is detachable and the expanding mandrel ( 2 ) in the unlatched position in the fuselage part ( 1 ) is axially displaceable. Spreizclip according to the preceding claim, characterized in that the body part ( 1 ) of three equidistant from each other at the abutment flange ( 3 ) integrally formed expansion segments ( 4 ) is formed. Spreizclip according to one of the preceding claims, characterized in that the Spreizsegmente ( 4 ) on the outside with crush ribs ( 17 ) are provided, which are preferably formed axially parallel. Spreizclip according to one of the preceding claims, characterized in that the Spreizsegmente ( 4 ) on the abutment flange ( 3 ) facing away from each side an insertion foot ( 18 ), which is formed after the free end to konussegmentförmig and projecting to the plant flange side formation of a locking surface relative to the Spreizsegmentschaft radially. Spreizclip according to one of the preceding claims, characterized in that the abutment flange ( 3 ) on the expansion segments ( 4 ) facing away with a radially disposed and over the entire investment flange ( 3 ) formed trough-like depression ( 19 ) for one at the head ( 7 ) of the expanding mandrel ( 2 ) formed bulge ( 20 ) or vice versa. Spreizclip according to one of the preceding claims, characterized in that the abutment flange ( 3 ) on the expansion segments ( 4 ) facing away with a centrally arranged tool holder, in particular a hexalobular ( 21 ) is provided. Spreizclip according to one of the preceding claims, characterized in that the expanding mandrel ( 2 ) and the body part ( 1 ) are arranged in the uninstalled and not plugged state by a predetermined breaking connection to each other. Detachable expansion clip for a clip connection of several components, with a sleeve-like body part ( 1 ) with spreading segments ( 4 ) and paraxial spaces ( 16 ) between them, an abutment flange ( 3 ) and a continuous axial insertion opening ( 5 ) as the first part for one out of a head ( 7 ) and a spread ( 6 ) formed expanding mandrel ( 2 ) as a second part, with at the Spreizsegmenten ( 4 ) Einstecköffnungsseitig formed projections ( 8th ) with one each with respect to the axis (A) of the insertion opening ( 5 ) inclined sliding surface ( 9 ) for the radial spreading of the expansion segments ( 4 ) when inserting the expanding shaft ( 6 ), and with guide means for the axial guidance of the expanding mandrel ( 2 ) in the insertion opening ( 5 ), whereby at the spread shaft ( 6 ) and at the spreading segments ( 4 ) Locking means ( 12 / 13 . 14 ) are formed in a predetermined axial insertion position of the expanding mandrel ( 2 ) in the fuselage part ( 1 ) in which the expansion segments ( 4 ) are spread apart for spreading, interlock, and wherein the latching connection formed thereby by a rotation of the expanding mandrel ( 2 ) about the axis (A) of the insertion opening ( 5 ) is releasable and the expanding mandrel ( 2 ) in the unlatched position in the fuselage part ( 1 ) is axially displaceable, characterized in that the expanding mandrel ( 2 ) and the body part ( 1 ) are arranged in the uninstalled and not plugged state by a predetermined breaking connection to each other. Spreizclip according to claim 8, characterized in that the body part ( 1 ) of three equidistant from each other at the abutment flange ( 3 ) integrally formed expansion segments ( 4 ) is formed. Spreizclip according to one of claims 8 to 9, characterized in that the Spreizsegmente ( 4 ) on the outside with crush ribs ( 17 ) are provided, which are preferably formed axially parallel. Spreizclip according to one of claims 8 to 10, characterized in that the Spreizsegmente ( 4 ) on the abutment flange ( 3 ) facing away from each side an insertion foot ( 18 ), which is formed after the free end to konussegmentförmig and projecting to the plant flange side formation of a locking surface relative to the Spreizsegmentschaft radially. Spreizclip according to one of claims 8 to 11, characterized in that the abutment flange ( 3 ) on the expansion segments ( 4 ) facing away with a radially disposed and over the entire investment flange ( 3 ) formed trough-like depression ( 19 ) for one at the head ( 7 ) of the expanding mandrel ( 2 ) formed bulge ( 20 ) or vice versa. Spreizclip according to one of claims 8 to 12, characterized in that the abutment flange ( 3 ) on the expansion segments ( 4 ) facing away with a centrally arranged tool holder, in particular with a hexalobular ( 21 ) is provided.

Images