DE7713248U1 - HANDLE FASTENING FOR HOUSE AND GARDEN EQUIPMENT - Google Patents

Description

.i !. : "Patent Attorneys Dipl.-1 ng. C u rt WaI I ach

Dipl.-Ing. Günther Koch Dipl.-Phys. Dr Tino Haibach Dipl.-Ing. Rainer Feldkamp

D-8000 Munich 2 ■ Kaufingerstraße 8 · Telephone (0 89) 24 02 75 · Telex 5 29 513 wakai d! / Date: April 27, 1977

Our reference : 15 86O - Κ / Αρ

Wolf Devices GmbH., 5240 Betzdorf / Sieg

Handle attachment for household and garden tools

The invention relates to a handle attachment for household and garden tools with a conical fixed to the tool Spout into which a cone seated at the end of the handle was driven is, with a slotted conical sleeve between the handle cone and the device socket via a thread in the axial direction and can thereby be braced in the radial direction.

Such a handle attachment is from the German utility model 70 29 578 known. Such a handle attachment has the advantage that without manual knowledge and without the need to drive in the handle and, without driving in a fastening screw or a fastening nail, a permanent fixation of a device on a handle this is made possible simply by twisting the stem with respect to the spout when the cone is inserted into the spout, as a result of the radial spreading, a firm hold in the grommet is guaranteed. This handle attachment also offers the advantage that the handle can be easily attached when required Way can be released again by placing the stem opposite

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the grommet is rotated in the opposite direction.

The invention is based on the object of further improving a handle attachment of the type mentioned at the beginning in such a way that that an even more secure friction fit and a more favorable mounting of the conical sleeve is guaranteed.

According to the utility model specification mentioned, this is preferred Plastic conical sleeve inserted directly into the appliance socket · To with very smooth socket inner surfaces and to ensure a secure fit even with ingress of moisture, was a form-fitting one according to the utility model Support is provided in such a way that the conical sleeve was provided with a cast-on cam which was inserted into a recess the handle grommet engaged. Although this ensured a secure mounting, it does, however, require a certain amount of attention when joining. If the cam does not snap into the recess and rests against the TÜTlenwand, an optimal contact between the conical sleeve and the grommet cannot take place.

To solve the problem is on the outside smoothly trained Cone sleeve pulled up a sleeve made of elastic material, which is opposite to the plastic material Has increased coefficient of friction and, after spreading, delivers the necessary frictional force that a Pulling out of the spout with certainty prevented. In this way, further form-locking brackets can be omitted and the insertion of the stem does not require any special attention to the mutual position of the spout and conical sleeve because it can be clamped in any relative rotational position.

The cuff, which is preferably made of rubber, is in

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'. a turning of the conical sleeve adapted to its wall thickness

inserted and on the one hand at the threaded section, on the other hand

on the head by a resulting increment

captively supported.

While with the handle attachment according to the above Utility model a single through slot of the sleeve was provided, the present invention provides that the conical threaded section of the conical sleeve is formed unslotted and several of this threaded sleeve section Slots running at the same angular distance (preferably 4 slots) arranged continuously to the opposite end are. The tongues formed by these slots are held in place by the sleeve that is pushed over.

To secure the conical sleeve to protect against loss and especially when pulling it out of the grommet Avoid getting the conical sleeve caught when attaching the handle in accordance with the utility model mentioned, a sleeve attached to the insert or to the end of the handle which can support the conical sleeve with an outwardly facing annular flange in the axial direction. This backup of the Cone nut is improved according to the present invention in that the front end of the stem cone by a Shank is extended, which carries a widened in diameter head piece, on which the sleeve with its front Can support end ring surface. This avoids the union sleeve, which is unavoidable at the fastening point causes a section that is broadened in diameter, which impairs the appearance and also the handling. Through this that the definition is relocated in the area of the grommet, the transition between stem and stem attachment can be without Pass through the enlargement slim.

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According to a further embodiment of the invention, the spring tongues formed by the slot are on their front Provided ends with inwardly facing lugs that rest against the shaft or slide along it and in their the front sbirnring-side section of the widened headpiece issue.

In this way, a handle attachment is created that is inexpensive to manufacture and ensures a secure friction fit and is easy to use without effort or skill. Even after frequent loosening of the handle attachment results no impairment of the bracket. This considerably expands the scope of the invention. The handle attachment can therefore not only be used to attach the usual household and garden tools, including such for example for cutting trees or plucking can be used by fruit, or can be used for window cleaning. According to a further embodiment the invention provides to use this type of handle attachment to handle handles or bars of any type if necessary to be able to break it down into shorter pieces. For this purpose, within one handle length there are several of the type of handle attachment trained devices provided, each handle attachment has a corresponding spout, so that if necessary the handle or the rod can be assembled or divided into several sections to shorten the storage space. For example It is desirable for grave maintenance to have devices available whose handle can be dismantled in order to better fit them a normal shopping bag or the like. To be able to take with you. This makes it possible to use a large number of small stem pieces to plug into each other and achieve a stem length that is otherwise common with continuous stems. Appropriately, these short stems are designed so that the nozzles sit in sleeves pushed onto a tube,

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which can also serve as a handle.

In this embodiment for the subdivision, the application of the invention is not to the fastening of household and kitchen appliances limited, but the invention can also serve to subdivide other rods, for example for subdivision of tent poles which are often provided with plug connections are. In addition, you can use this handle attachment for subdivision of any kind of supports, for example also for garden umbrellas and the like. Use.

An embodiment of the invention is illustrated below described in the drawing. In the drawing show:

1 shows a sectional view of the handle attachment designed according to the invention;

2 shows, as an individual part, a sectional view of the conical sleeve; Fig. 3 is an axial view of the conical sleeve naoh Flg. 2;

Fig. 4 is a perspective view of the handle attachment;

5 shows a perspective illustration of a by means of the handle attachment according to FIGS. 1 to 4 in several sections subdivided rod or a stem.

Zn the aluminum tube 1 is a plug-like plastic part 2, which is advantageously a twelve-point is formed, pressed in. This stopper 2 has a collar 3 with a diameter of the stem 1 corresponding Diameter, so that the end ring surface of the stem is supported on this collar. The Bund 3 is connected to the art

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fabric part first a short cylindrical paragraph and then an enlarged cylindrical thread section 4 to which in turn a cylindrical section adjoins continues into the stem cone 5. At the end of the stem cone, a shaft section 6 protrudes from the one at its end wears enlarged head 10. Parts 2, 3, 4, 5, 6 and 10 and the cylindrical sections in between are components of a uniformly pressed or injection-molded one Plastic part.

A conical sleeve 8 is placed on the stem cone. This has a cylindrical, internally threaded collar and a conical section, formed by slots 8a is divided into four spring tongues «whose ends with after inwardly pointing approaches are provided «which slide along the shaft 6. The slotted section of the conical sleeve is provided with a deposition «in which a cuff 7 from elastic material "preferably made of rubber" is drawn. The conical sleeve is inserted into the device socket 9 «whereby the Items occupy the position shown in FIG. 1. Then the handle 1 and with it the one from stoppers 2 and Stem cone 5 and thread 4 and extension 6 «10 existing plastic part in the non-rotatably held within the spout 9 Conical sleeve 8 is screwed in and during this screwing-in process, the stem cone 5 expands the conical sleeve, in particular in the area covered by the cuff 7 so that the tongues spread outwards and the friction cuff 7 Press tightly against the grommet 9.

When unscrewing, the enlarged head 10 takes the conical sleeve 8 with it after it has reached the position shown in FIG is "so that it can be removed with the handle attachment and does not remain inside the spout" in the they may be more or less firmly adhered to over the

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Axial support of the spring tongues widened at their front end on this head part 10 makes lifting out easier and at the same time it is avoided that the conical sleeve is lost.

The assembly of the handle attachment can be done in a simple manner respectively. The handle attachment can be supplied with or without a handle. In the former case, the plug 2 is already permanently hammered into the stem tube 1 and this is the preferred type of application. When screwing on the conical sleeve 8 on the thread 4, the slots formed by the slots 8a widen Tongues on so that the front Ansätae of the tongues can slide over the widened head piece 10 and thereafter the tongues with their inwardly directed projections fall radially onto the shaft section 6. They will be radial after held inside by the attached Oummimanschette 7, so that the conical sleeve is now captive with the stem cone connected is.

In Fig. 4 a schematic arrow representation can be seen, which illustrates the sequence of movements. By turning the stem, the stem cone 5 is screwed into the Sleeve 8 and this is expanded accordingly radially outward

and clamped in the spout 9,

\ Fig. 5 illustrates the use of the handle attachment as a

Handle extension, with one at the end of each partial handle tube Sleeve is placed, which practically corresponds to the inside of the spout 9 and can serve as a handle. The front end of one As can be seen from FIGS. 1 and 4, each stem part is designed.

The stopper 2 with the parts integrally connected to it ; Not only can it be made of plastic, but could also be made of

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Be made of aluminum or another material. If this part is made of plastic, it is useful to have the shaft 6 with the head piece 10 as a steel insert injected to ensure even better support.

Protection claims

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Claims (12)

I I * ν 1 1 * si hu> i «erco oto« * - \ - 9 protection claims: 1. Handle attachment for household and garden tools with a conical that is fixed on the tool Spout »into a cone sitting at the end of the handle can be driven in «with a slotted conical sleeve between the handle and the device socket a thread can be tightened in the axial direction and thus expanded in the radial direction « characterized «that on the slotted conical sleeve (8) one off elastic material existing cuff (7) is pulled. 2. Handle attachment according to claim 1 «characterized« that the sleeve (7) is inserted in a section of the conical sleeve which is reduced in diameter is. 3. Stielbefes & lgung according to claims 1 and 2 « characterized «that the sleeve (7) made of rubber or the like elastic material. 4. Handle attachment according to claim 1 «characterized« that the conical sleeve consists of a closed sleeve body with a cylindrical internal thread and a Konusabsohnitt consists "of through slots (8a) in individually spring-loaded tongues is divided. 7713248 08/04/77 • · "7 - 10 - 5. handle attachment in particular according to claim 1, characterized in that that the front end of the stem cone (5) is extended by a shaft (6) which is an im The widened diameter head piece (10) carries, on which si ^ h the front end of the conical sleeve supports. 6. handle attachment according to claims 4 and 5 _s characterized in that that the tongues formed by the slots (8a) at their front end with inwardly standing Approaches are provided with which they rest against the shaft (6) and the frontal stop surfaces for the widened head piece (10). 7. handle attachment according to one of claims 1 to 6, characterized, that a plug (2) made in one piece with the stem cone (5) is pressed into a stem tube (1). 8. handle attachment according to claim 7, characterized in that that the stem cone (5) with the threaded section (4) and the plug (2) are made in one piece from plastic is and that the plug is designed as a twelve-point. 9. handle attachment according to claim 8, characterized! that in the stem cone made of plastic (5) The shaft (6) with a widened head (10) are injected as a steel insert. ■ ^l 7713248 04.08.77 10. Handle attachment according to claim 7, characterized in that that the stem cone (5) and the parts integrally connected to it are made of aluminum exist. 11. Handle attachment according to one of claims 1 to 10, characterized in that it is designed as a stem extension (Fig. 5). 12. Handle attachment according to claim 11, characterized in that that the spout (9) consists in a sleeve pushed onto a stem section and fixed there. 7713248 08/04/77