DE1873130U - HANDLE HOLDER FOR HOUSEHOLD APPLIANCES SUCH AS BROOMS, SCRUBBERS OD. DGL. - Google Patents

Description

BA. 15 putty * -6.3,63

DR. ING. HANS LICHTI PATENT ADVOCATE KARLSRUHE-DURLACH GRÖTZINGER STRASSE 61

TELEPHONE 41124

March 4, 1963 I09I / 63

Erich Herrmann & Co. KQ., Grötzingen (Baden), Eisenbahnstrasse 8

Handle holder for household utensils

The innovation relates to a handle holder for attaching round wooden handles to household utensils made of wood, such as brooms, scrubbers and the like., In Shape of a part to be inserted into a circular recess of the implement in the lower part is conical downwards tapered, used in the upper to insert the stem Part of an approximately cylindrical sleeve made of metal, whose lower conically tapered sleeve part with external thread, the upper cylindrical sleeve part with co-rotating Internal thread is provided.

For attaching wooden handles to brooms, scrubbers and the like. There are already numerous structurally different Fasteners have been proposed, mostly based on the action of being driven into the wood

Claws or threads to be screwed into the wood. A common handle holder is designed as a sleeve-shaped body made of metal, which is in a Handle hole of the implement to be used part with a conical, but possibly also cylindrical External thread can be screwed in. The one protruding from the handle bore of the implement, mostly cylindrical part of the sleeve-shaped body is on the inside also provided with a thread into which the handle is screwed. In some known embodiments the attachment of the stem to the sleeve can also be done by measures other than threads.

Since the usual household utensils, such as brooms, scrubbers and the like, are often used by the manufacturer with handle holes different diameters must be provided, the sleeve part to be screwed into the stem bore of the handle holder have a considerable taper. To get a really lasting bond, you have to hence the handle fastener in the bristle holder of the implement screwed in very tightly. Neither the handle hole in the tool's bristle holder nor the handle themselves are provided with a pre-machined thread before fastening. Rather, this is only just forming by the pressure of the threads of the handle holder the initially smooth wooden surfaces. The screwing in of the handle holder therefore requires a considerable amount of force, The women in general who use the appliances in question in the household and mostly themselves need to assemble, not be able to apply. Since the bristle holders of the tools are made of hardwood, rotates the conical external thread of the handle holder is generally very weak, so that - depending on the width

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the stem bore - the conical part of the sleeve-shaped Body in the bristle holder only with a few threads is stuck at the lower or upper end. As a result of this, the handle holder comes off very easily from the bristle carrier of the implement.

In a similar way, albeit less pronounced, this deficiency also occurs at the screw connection of the cylindrical sleeve part of the handle holder and the handle. The threads cut very weakly into the wood, so that after a certain time, especially if the wood shrinks for a long time due to drying out, Loosening can occur.

The innovation is based on the task of a handle holder to create in which the abuses mentioned thereby are eliminated that both the external thread of the conically tapered sleeve part when screwing into the stem bore of the tool, as well as the internal thread of the cylindrical sleeve part when screwing in the handle is actually driven in to approximately the depth of the thread turns, if necessary cut. This object is achieved according to the innovation by the external thread of the conical lower sleeve part and the Internal thread of the cylindrical upper sleeve part at intervals interrupting from top to bottom continuous Grooves, the depth of which is preferably approximately equal to the depth of the threads. The interruption of the two threads through grooves has the consequence that the thread parts remaining between the grooves as a result of the higher surface pressure on them when screwing are able to penetrate deeper into the wood. It will be the same Force a greater surface pressure on the remaining

Benden surfaces of the threads achieved, so that this makes it possible to continue the screwing process.

The grooves of both sleeve parts can be in the axial direction or at a smaller angle to the direction run along the longitudinal axis in the form of a very steep spiral. The arrangement and spacing of the grooves can within certain limits, taking into account the intended purpose and processing requirements be freely chosen. You can, therefore, both equally spaced as well as at irregular intervals.

The shoulders of the ones remaining between the grooves Threaded parts can run radially as well as to both sides by smaller or larger angles of deviate from the radial direction. Depending on the training of the shoulders, the effect of the between the grooves can be remaining threaded parts on the wood during the screwing process may be different. For example, be radial shoulders sloping towards the bottom of the grooves on the run-up side the threaded parts always have a strong cutting effect, d. H. the thread is in the same Cut like a thread cutting tool. The grooves also serve to collect the chips.

If, on the other hand, the shoulder on the run-up side of the threaded parts is at an acute angle to the radial direction sloping, then there is no significant cutting effect, but the thread is pressed in.

The design of the shoulders is based on the one hand on the hardness of the wood and on the other.

on the other hand according to the direction of the wood fibers to the direction of the Threads. When the wood fibers are approximately the same As the thread turns are level - this is the case, for example, with the usual boron part holders for tools - it is then advisable to use the grooves to train so that the shoulders of the threaded parts exert a powerful cutting effect, that is, in a radial direction Slope towards the bottom of the grooves. If, on the other hand, the wood fibers run perpendicular to the direction of the threads, as is always the case with the handle, then It is advisable to design the grooves in which the shoulders of the threaded parts are at least on the run-up side only perform an impressing effect, so gradually sloping down to the bottom of the grooves.

The modernization of the handle holder guarantees a firm fit, even if tools are used for a long time. It is, for example known that the handle bores of the bristle carrier of implements due to the uneven shrinkage of the wood in the direction and perpendicular to the direction of the fibers are often out of round, so that the handle attachment loosens in one direction. The design of the handle holder in the manner of a thread cutting tool allows the handle holder to cut so far into the wood that it is also in the direction of the longer diameter a non-circular stem bore comes into play.

Further details and features of the subject of the innovation emerge from the following description of the accompanying drawings, in which several embodiments of the handle holder according to the innovation are shown in a schematic representation * In the drawings demonstrate:

Fig. 1 the handle holder in a simple way *

guide form in side view with partially broken wall of the cylindrical sleeve part;

2 shows the same in cross section along the cutting line II - II in Figure 1;

Figures 3 to 5 J ^e a four-part circle expansion of the lower conical sleeve part with external thread in each different thread formation in plan view in an enlarged view ^

FIGS. 6 to 8 each have a quarter-length opening of the upper cylindrical sleeve part with an internal thread each with a different thread design in a similar representation.

The handle holder shown in its entirety in Figure 1 consists of a lower, downwardly conical tapered sleeve part 1 with external thread for screwing into the tool (broom, scrubber, etc.) and an upper cylindrical sleeve part 2 with an internal thread for screwing in the stem, both of which are made of metal, e.g. B, Zinc, aluminum and the like. Manufactured in one piece, preferably cast. Both threads are through in axial Directional grooves Io, 2o interrupted, their Depth is equal to the depth of the threads.

The thread parts remaining between the grooves lo, 2o 11, 21 of those shown in FIGS. 1, 2, 3 and 6 Embodiments have shoulders 12, 22 and 13, 23 sloping in the radial direction on both sides.

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For several reasons it may be appropriate to the shoulders of the threaded parts 11, 21 at least one side gradually towards the bottom of the associated groove Io, 2o sloping inclination to give.

In the embodiments shown in Figure k for the external thread of the conical sleeve part 1 and in Figure 7 for the internal thread of the cylindrical sleeve part 2, the shoulders 13 »23 fall in the radial direction on the side tapering in the screwing direction, whereas the shoulders 14, 24 fall on the other Side (drainage side) of the threaded parts 11, 21 at an acute angle to the radial direction, that is to say to the bottom of the adjoining groove Io, 2o gradually. Figures 5 and 8 show the reverse formation of both threads. The shoulders 12, 22 on the outlet side of the threaded parts 11, 21 drop in the radial direction to the bottom of the grooves Io, 2o, whereas the shoulders 15, 25 on the run-up side of the threaded parts drop at an acute angle to the radial direction, ie they rise - seen in the screwing-in direction gradually from the bottom of the grooves Io, 2o.

In the embodiments of Figures 3j 4 »6 and 7, their threaded parts 11, 21 on the run-up side radially have running shoulders 13 »23, occurs when screwing a pronounced cutting effect in the sense of thread cutting tools. On the other hand, they work gradually from the bottom of the grooves Io, 2o rising shoulders 15, 25 on the run-up side of the threaded parts 11, 21 in the training according to Figures 5 and 8 in the sense of a non-cutting deformation by pressing in the thread.

The type of training of the shoulders can depend can be freely chosen from the intended purpose and type of wood. Since the bristle carriers of the Tools such as brooms, scrubbers, etc. are generally made of hardwood that has a good thread cutting effect is desirable, the formations with radially sloping shoulder 13 on the run-up side of the threaded parts (Figures 3 »^) of the external thread of the conical Sleeve part 1 is preferable. The design of the shoulders 12, 14 on the drain side can be arbitrary, e.g. B. also with Consideration of casting requirements can be selected .

Other considerations apply to the design of the shoulders of the threaded parts of the cylindrical sleeve parts, The wood of the stems is usually soft, long-fibered and tough and the wood fibers run perpendicular to the direction of the Threads. To prevent tearing or tearing of the fibers and detrimental weakening of the stem, recommends For this purpose, a shoulder formation according to FIG. 8, in which the thread is not cut, but is pressed in with material compression. For this purpose could also be an embodiment (not shown) can be used, in which both shoulders of the threaded parts 21 to the bottom of the adjacent grooves 2o gradually fall off.

For average purposes, therefore, an embodiment is recommended in which the conical sleeve part, 1 with external thread a shoulder formation as in the figures 3 or 4, the cylindrical sleeve part 2 with an internal thread, on the other hand, has one as in FIG.

In all of the embodiments shown, the depth of the grooves is equal to the depth of the threads. If the material thickness permits, the grooves can of course also be deeper or, if the stem hole of the bristle holder fits well, also less deep
be introduced. They can also run as a steeply set spiral instead of in the axial direction, deviating from the drawing.

Claims (6)

I091 / 63 protection claims 1. Handle holder for attaching round wooden handles to household utensils made of wood, such as brooms, scrubbers and the like., In the form of a part to be inserted in the lower part in a circular recess of the implement conically tapered at the bottom, and in the upper part used for inserting the handle, an approximately cylindrical sleeve Metal, the lower conically tapered sleeve part with external thread, the upper cylindrical sleeve part with is provided with a co-rotating internal thread through the external thread of the conical sleeve part (l) and the internal thread of the cylindrical sleeve part (2) interrupting at intervals, continuous from top to bottom Grooves (lo, 2o). 2. Handle holder according to claim 1, characterized in that that the grooves of both sleeve parts in the axial direction or with a small angle of attack to the direction the longitudinal axis in the form of a very steep spiral, and that its depth is approximately equal to that Depth of threads is. 3 · Handle holder according to claims 1 and 2, characterized in that the shoulders (12, 13, 22, 23) the threaded parts (11, 21) of both sleeve parts (l, 2) remaining between the grooves (lo, 2o) on both sides fall radially. I09I / 63 4. Handle holder according to claims 1 and 2, characterized in that the shoulders (l4, 15, 24, 25) the threaded parts (11, 21) of both sleeve parts (1, 2) sloping down at least on one side at an acute angle to the radial direction, 5 · Handle holder according to claims 1 to 4, characterized in that the shoulders (12, 13) of the threaded parts (External thread) (ll) of the conical sleeve part (l) fall off in the radial direction, the shoulders (24, 25) the threaded parts (internal thread) (21) of the cylindrical sleeve part (2) at least on one side in one decrease at an acute angle to the radial direction. 6. Handle holder according to claim 5 »characterized in that that the shoulders (25) of the threaded parts (internal thread) (21) of the cylindrical sleeve part (2) on the side that tapers in the screw-in direction, sloping down at an acute angle to the radial direction »