DE8129409U1 - "Hole plug" - Google Patents

Description

The invention relates to a hole stopper atie elastomeric material, in particular for sealing paint run-off holes in motor vehicle bodies, bait a closed bottom, a puddle covering the edge of the workpiece hole, a connecting the bottom with the flange Collar, and one formed on the outside of the collar and engaging behind the opposite edge of the hole, annular Shoulder.

Such a hole pot is known for closing paint or FarbabläUflöehern in Automobilkarosseriött (DE-Gm 69 33 117) * A cup-shaped part of the hole plug vird pressed into the opening until the flange on the front

Buropeen Patent Attorney «·! ZagcUisscSmi Vormetcw at the European Patent Office Deutsche Bank AO Hamburg ^ ** '· Ο ^^ β' ⁴⁹ ^ JbLJt * dÖOi'döbO) ■ Postscheck Hamburg 2842-2ΟΟ Dresdner Bank AG Hamburg. No. Θ33ΘΟ35 (BLZ 20080000)

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The edge of the opening and the circumferential ring shoulder behind the edge of the opening snaps. The well-known hole pot is made made of rubber or an elastomeric plastic material

The holes to be closed as a rule have large tolerances, so that the tight closure with the aid of the hole plug may under certain circumstances depend on the accuracy of the dimensions of the workpiece hole. It has therefore also become known to use perforated pots in conjunction with melt and adhesive layers, with the Sohmelzklebeechicht both sealing and adhesive functions (DE-OS 21 kk 359).

Finally, a hole stopper has also become known, which consists entirely of a hot melt adhesive, which is fixed in a sealing and adhesive manner in the area of the hole edge after insertion and heating (DE-OS 23 U 021).

Hole plugs using hot melt adhesive have the disadvantage that heat must be supplied to the installation site. This method is therefore complex and relatively time-consuming. Known hole plugs made of elastomeric material have the Disadvantage that they are not always used properly * The reason is above all * that the workpieces often are difficult to reach and can hardly be seen · For this reason the operator is also unable to check whether the hole plug is in place with a sealing seat. Is the hole plug meanwhile not installed correctly, the desired seal is no longer available

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ensures' cmd there is even a risk that it will look after loosens for some time due to vibrations and falls out.

The invention is therefore based on the object of a perforated pot Made of elastomer material, especially for sealing of leakage holes in the bodies of motor vehicles create, which is easy to manufacture and assemble and which also allows a control of its correct fit

This object is achieved according to the invention in that from the side facing away from the workpiece for non-positive reception of a Mortagedorna a recess is formed in the ground.

The invention is based on the fact that hole plugs made of elastomeric material are anyway mostly with tool aid be placed. When the hole plug according to the invention is now a Recess is provided into which a tool mandrel can be positively inserted The hole plug according to the invention is made with the help of Tool mandrel inserted into a workpiece hole Placement is achieved by arching the bottom of the plug and the sealing shoulder snaps against the underside of the Loclirättdes sets so that both the secure fit and the sealing effect of the hole plug is made, whereas the hole plug a not properly attached, the frictional connection of the dome in the recess is sufficient to remove the hole plug again if the tool mandrel is removed. The operator notices

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date immediately if the perforated pots are not inserted correctly • was and can therefore repeat the assembly process until the Hole plug is correctly placed.

According to one embodiment of the invention, the recess is circular gebi3.det. However, it can also have a polygonal shape. It is also useful if the mandrel section is shaped complementarily to the recess, in the case of a circular one The recess is also circular.

According to a further embodiment of the invention it is provided that the recess tapers in the direction of its opening. A There is a frictional connection between the insertion mandrel and the recess wall therefore mainly in the upper area of the recess. This force closure is increased during the insertion process because when inserting the bottom towards the workpiece hole elastically deformed. As a result, the recess narrows in the opening area, and the recess wall becomes in this area pressed relatively firmly against the outside of the insertion mandrel.

In addition or as an alternative to the non-positive insertion of the Tool mandrel in the recess can also be provided to form a latching connection between the insertion mandrel and the recess create, in which the insertion mandrel can be inserted into the recess with a snap and the removal of the insertion mandrel a certain Requires tensile force to loosen it from the hole plug. This train

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strength must, as with normal frictional connection, be sufficient to remove the incompletely inserted hole plug with the mandrel. On the other hand, the plague holding power is allowed between the hole plug and the tool mandrel should not be so large that the hole plug locks in the workpiece hole when it is removed of the tool mandrel is overcome.

According to a further embodiment of the invention it is provided that the collar of two arranged at an acute angle to each other Collar sections are formed which border a circumferential, in cross-section, approximately V-shaped groove. One of those shaped collar represents a spring arrangement acting in the radial direction, which has very large tolerances of the work «« Can encounter tick holes. The outer of the two collar sections is pressed against the wall of the hole with sufficient radial spring force in order to achieve an effective seal bring about.

According to a further embodiment of the invention it is provided that the flange is curved and only with its radially outside lying area rests on the workpiece. While with conventional hole plugs, the flange is designed in the shape of a cone ring is, the flange in the invention has a curved shape, preferably circular in cross section, so that only the radial outer area of the flange engages the workpiece in a sealing manner. A flange designed in this way ensures 2, 'relatively high spring forces, which benefit the sealing effect. It also prevents its deformation under radial pressure

Embedment forces. _{l / r}

It also takes care of the compensation of tolerances in the With regard to the workpiece thickness.

Finally, for the hole plug according to the invention, a tool is also provided for its insertion, which tool according to the invention has a mandrel portion connected to a handle, the outer dimension of which is slightly larger than that of the complementary shaped recess. When the mandrel section is inserted, the wall of the recess is therefore slightly deformed radially, around a frictional connection between the recess wall and the mandrel section to manufacture. It protrudes that the mandrel can also have radial projections or lugs, which with corresponding in Undercuts cooperate in the recess and which require a certain pull-out force on the mandrel in order to remove it from the hole plug.

According to a further embodiment of the tool according to the invention it is provided that the mandrel section at the free end face a having axial bore. This hole is used to receive a pin present within the recess, which is used during injection molding of the hole plug according to the invention arises. Alternatively can therefore also be provided according to the invention, the pin with to allow the bore of the mandrel to engage positively and / or positively in order in turn to achieve a predetermined pull-out force.

An embodiment of the invention is based on the following

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of drawings · described in more detail.

Fig. 1 shows a plan view of a Lochstopl'en after

Invention.
FIG. 2 shows a section through the hole stop according to FIG. 1.

Figs. 3 to $ show the assembly of a hole plug according to Fig. Or 2 in a hole in three stages.

Before referring to the figures and details shown in the drawings is discussed in more detail, it should be preceded by that each of the features described and shown individually or in conjunction with features of the claims essential to the invention Meaning is.

In the figures, a plate-shaped Locb.stopfen 10 made of ecstomeric plastic material is shown. The hole plug 10 is circular and has a flat bottom section 11, a first collar section 12 running at an angle to it, a second collar section 13 running at an acute angle to the first collar section 12 and a flange 14 with a circular arched cross section. The collar sections 12, I3 form an im Cross-section of V-shaped annular groove 1JJ. The top of the bottom section 1 ¹ is level with the top of the flange 1 ^.

On the outside of the collar portion 13 is an inclined Shoulder 16 integrally formed, which the lower Lo ^ hrand a hole a workpiece plate 17 engages under, while the free edge of the flange 14 on the top of the workpiece plate 17 to

lie comes * Vie from Pig · 2, lies the free edge 18 of the flange U at the level of the upper edge of the annular shoulder 16, so that when inserted into the workpiece hole of the plate 17, the flange 14 is deformed upwards by a certain amount and the flange is thus pressed against the workpiece plate 17 from above with a predetermined force.

For better insertion in the workpiece hole is the outer one Kragexi section 13 bevelled like a ramp, as shown at I9 * When it is inserted into the workpiece hole, this becomes the outer one Collar section 13 deformed radially inward «just like that Krasen section 12. The one formed from sections 12 and 13 Collar therefore represents a spring acting in the radial direction.

The bottom section 11 is turned down in the middle at 20, so that a circular recess 21 results. The circular recess 21 tapers in the direction of her Opening. At the bottom of the recess there is a pin 22 which is produced by the injection molding process.

In FIGS. 3 to 5, a tool 23 is also shown, which has a handle 2h and a dome extension 25. The mandrel section 25 is also circular in cross section and has at the free end a conical bond 30 which widens towards the end and which can be inserted into the recess with an approximate fit or with a little oversize. In this case the wall becomes the recess

temporarily slightly outwardly deformed radially. The mandrel section 25 therefore sits positively and / or non-positively within the recess 21 * When inserting the hole plug 10 into the workpiece hole in the direction of arrow 31, the bottom section 11 is arched downwards, with the upper edge of the recess 21 calibrating even more firmly against the outside of the 'The mandrel section 25 presses (Fig. 4), If the shoulder 16 * does not snap against the underside of the workpiece hole with a clear clicking noise, the force and / or form fit between the recess wall and the collar 30 is sufficient, the hole plug 10 when removing the tool 23 in the direction of arrow 32 to take it with you again (Fig. 5). This enables the operator to recognize that correct placement of the hole plug has not been carried out.

The mandrel section 25 can hear a blind hole from the end face have, which receives the pin 22, which can also be made arbitrarily larger without interfering with the assembly process. In the end the pin can also be designed so that it contributes to a non-positive and / or positive connection with the Tool 23 to produce.

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Claims (12)

Α_η s ^ g r α c_h_e £ 1 «Hole plugs made of elastomeric material, especially for sealing of paint leakage holes in the bodies of motor vehicles, with a closed base, a flange covering the edge of the workpiece hole, and a base with the collar connecting the splash, and one formed on the outside of the collar, the opposite edge of the hole engaging ring-shaped shoulder, characterized in that that on the side facing away from the workpiece (17) to the non-positive and / or a form-fitting receiving of a mounting dome (25) in the base (11) a recess (21) is formed is. 2. Hole plug according to claim 1, characterized in that the Recess (21) is circular. 3. Hole plug according to claim 1 or 2, characterized in that that the recess (21) tapers in the direction of its opening. h, hole stopper according to one of claims 1 to 3i, characterized in that the recess (21) is formed in an approximately flat section (11) of the bottom. 5, hole plug according to one of claims 1 to 4, characterized in that that the collar of two at an acute angle to each other ... / 11 • · β. ft. • Iff arranged collar portions (12, I3) is formed, the a circumferential, in cross-section approximately V-shaped groove (15) limit. 6. Hole plug according to one of claims 1 to 5, characterized in that the flange (i4) is arched and only with its radially outer region (18) on the workpiece (17) ■ rests. 7. Hole plug according to one of claims 1 to 6, characterized in that that the ¥ and the notification reception (21) is roughened. 8. Hole plug, in particular according to one of claims 1 to 7, characterized in that, on the side facing away from the workpiece, a pin is formed on the bottom for the force-locking and / or form-fitting reception of a mounting mandrel3. Tool for inserting a hole plug according to one of claims 1 to 7 into a workpiece hole, characterized by a mandrel section (25) connected to a handle (2k ), which is shaped approximately complementary to the recess (21) for form-fitting and / or force-fitting reception is. 10. Tool according to claim 9, characterized in that the The mandrel section (25) has an axial bore (26) at the free end face. ... / 12 • · ti i ¹ J '*''·<· 11. Tool according to claim 9 or 10, characterized in that the outside of the mandrel section (25) is roughened. 12. Tool according to claim 9, characterized in that the The mandrel has a conical collar (30) at the free end, which widens towards the end.