DE19528762C1 - Filling system for insertion of bristles into brush head - Google Patents

Abstract

The filling system in which a hank (22) of preformed staples (20) is produced. The hank is fed symmetrically in relation to a plane containing the filling axis (A). At intervals the leading staple is separated from the hank as it is moved against the bundle of bristles (16) already lying transversely to the filling axis (A). The hanks are formed from staples which are packed parallel to one another.

Description

The invention relates to a method according to the preamble of Claim 1 and a tamping tool according to the preamble of Claim 10.

Brushes in the sense of the invention are both coarse brushes and Be sen, hand brush, strong hair brushes, clothes brushes etc. as also fine brushes such as toothbrushes, nail brushes, fine hair and Dishwashing brushes, brushes with monofilaments etc. are under cramps the usual mechanical fastening in the sense of the invention to understand elements with which a bundle of bristles in one Brush hole of a brush body is attached. As cramps Round wire sections are usually used for coarse brushes turns the U-shaped to a central area of the associated bristle bundle and crossed behind are so that they form a loop, the ends of which are at Press into a brush hole and spread it out. For fine brushing, however, are usually rectangular flat wire cuts, so-called anchors, which are used diametrically in the proper brush hole are pressed where they are something in the Press in the perforated wall and thereby clamp it.

The central component of brush manufacturing machines is a plug tool with a slide that can be moved back and forth in a stroke a plunger that is drilled into a pre - drilled or pre-sprayed brush hole of a brush body a filament or push in bristle bundles and fasten them there. The darning Tool has a tappet channel into which the filament or  Bristle bundle is inserted from one side, then from the plunger folded in the middle and thus as a V-shaped Ge form with the top of the head pushed into the brush hole will. In the tappet channel, the staple is depending on its procurement open around the filament or bristle bundle laid around or as a knife-like anchor in the folding of the bundle of the resulting crown.

Details of the formation of staples from round wire are from the DE 26 54 365 C2 known. The wire is taken from a coil Darning tool in a parallel to the stop axis at a distance len level, within the tamping tool to a front given length cut and bent so U-shaped that a A pair of legs pointing towards the brush hole are created. this happens during a stroke of the slide away from the brush hole. Against At the end of this stroke, the U-shaped piece of wire from Abweisram pen moved parallel to itself in the tappet channel, the the stop axis defines, along which the plunger back and forth is mobile. The plunger pushes the U-shaped wire over the flat that has now been inserted into the tamping tool lying filament or bristle bundle, so that this in the Rounding of the U-shaped piece of wire comes to rest. On the plunger then knocks the wire piece over with it connected bundles between tool jaws through which a tool head attached to the slide are arranged and bend the legs of the wire piece in such a way that a noose is created that fills the bundle in the middle constantly encloses. Finally, the plunger drives the wire piece with the bundle centrally in the associated brush hole of the brush body. During this movement does not move only the ram but also the tool head to the hole. Of the Tool head comes to the surface of the brush body Standstill while the plunger with the wire-enclosed one Dips the bundle into the hole. So the wire loop is on led their entire range of motion.

The tool head lifts off the brush body during the reverse stroke by and releases the bundle completely. The stroke length depends  thus on the length of the bundle; the longer its bristles the larger the stroke required. After a Has been attached, a brush holder moves holds the brush body so that the next one to be stuffed Brush hole is aligned with the stop axis. Then that leads The next working cycle.

The tamping tool known from DE 26 54 365 C2 therefore has a variety of movements to perform the different To cope with operations. In the simplest case, that the work stuff with a single slider to stuff just one brush lochs per work cycle, it is about following movements:

• - Defined wire feed,
• - Cutting movement to avoid that for the U-shaped cramp to cut off agile piece of wire,
• - Return stroke of the tool away from the bust body for shaping the U-shaped cramp,
• - moving the staple into the tappet channel,
• - inserting a bundle of filaments or bristles,
• - Working stroke of the ram, in which the U-shaped cramp placed over the bundle, formed into a loop and is pushed into the brush hole.

These movements are usually mechanically more expensive Complementary eccentric controlled, their manufacture because of necessary time coordination of the movements is not easy is.

Tools of the type known from DE 26 54 365 C2 form the previous end point of a development of about a hundred years and allow tamping speeds of up to 500 bundles / min. The following problems are associated with this high performance generic darning tools compared to:

• - The darning tools are the most expensive and most prone to failure Assembly of a brush manufacturing machine,
• - they require expensive spare parts,  
• - He almost every bundle thickness and every hole diameter calls for a different tool with other components the wire feeder, other ram etc.,
• - Metal is created when the wire is cut and bent output that increases tool wear,
• - A shaped plate is required to bend the wire Lich, in the tightest of spaces within the tamp tool must be accommodated and therefore not can be dimensioned particularly vigorously so that it breaks is sensitive
• - For brushes with short bristles, bristle bundles must be included considerable excess length can be used because of the more common wise circular-shaped bundle conveyor because of the req other components for cutting and bending the wire not be placed in the most convenient place can,
• - There are restrictions when choosing the wire (e.g. aluminum is too soft, while stainless steel wire increased Wear results),
• - the wire can hardly be bent other than in a U-shape, which is not the cheapest form in every respect.
• - It can only be used for this type of attachment without round wire Profiling can be used.

The same applies to known tamping tools of the other genus, which cut a wire usually supplied as an anchor from a supplied flat wire in each working cycle. This is not bent, so that a bending punch in the tamping tool is unnecessary and a tamping speed of up to 900 bundles / min can be achieved. However, the cutting edges required to separate the anchors in the tamping tool are susceptible to wear, and any untidy or too short cut of the anchor can result in it, and thus also the bundle of bristles held by it, sitting poorly in the brush hole.

The invention is therefore based on the object of a method for stuffing brushes and the associated Simplify stuffing tool so that when compared to previous state at least the same production speed and quality of the bundle attachment less operational disruptions and interruptions are expected.

The object is achieved insofar as they are the method meets with the features of claim 1, which according to the Claims 2 to 9 can be further developed. An invention according tamping tool is the subject of claim 10.

Stapling devices are known, the pre-made and U-shaped stacked in a magazine Process parentheses, of which the bottom or foremost separated from the stack by means of a pestle and is driven into a workpiece. One from which DE 39 36 980 A1 known device for clipping folded over sack or hose ends has one Tappet channel with a closable side opening in which the sack or hose end can be inserted. The clip ends penetrate the sack or hose material and are bent behind by a counter plate. Of the Ram is operated by a hydraulic cylinder. A other, compressed air powered device, also before manufactured U-shaped staples from a stack and drives them into workpieces, is from DE-PS 11 74 269 known. Finally, DE-AS 10 91 529 different Such two - leged staples for stapling Cardboard known. The staples are U-shaped from flat mate rial bent and have one at the ends of their legs Notch with which to staple after penetrating the slide the cardboard along a rib of an anvil, whereby the thighs towards the back of the clip roll.

Embodiments of the invention are described below further details with the help of schematic drawings wrote. Show it:

Fig. 1 is a perspective view showing the procedure when stuffing a brush according to the sling procedure,

FIG. 2 shows various embodiments of suitable therefor staples;

FIG. 3 shows a tamping tool provided in longitudinal section III-III in FIG. 4 for carrying out the method according to FIG. 1;

Fig. 4 shows the longitudinal section IV-IV in Fig. 3;

Figure 5 is a perspective view showing the procedure when stuffing a brush after the anchor procedure.

Fig. 6 different embodiments of staples in the form of anchors for the process of Fig. 5;

Fig. 7 is a filling tool for performing the method according to Figure 5 in longitudinal section VII-VII in Fig. 8.

Fig. 8 shows the longitudinal section VIII-VIII in Fig. 7;

Figure 9 is a perspective view of the plug of a brush according to a modified anchor method.

Fig. 10 a suitable for performing the method of FIG. 9 tamping tool in longitudinal section XX in Fig. 11 and

Fig. 11 is a longitudinal section XI-XI in Fig. 10.

Referring to FIG. 1, a brush body 12 is fastened on a brush support 10 having the brush holes 14. The brush holder 10 can be moved, for example by means of known sliding tables with up to five independently controlled axes, such that a brush hole 14 is aligned with a stop axis A. A bristle bundle 16 is fastened in this brush hole 14 as follows:
The bristle bundle 16 is separated from a bristle supply 18 and brought into a position in which the stop axis A extends centrally and at right angles through the bristle bundle. Then a prefabricated U-shaped cramp 20 is released from a strand 22 which consists of a plurality of loose, e.g. B. by a lacquer layer, interconnected identical staples and is supplied at right angles to the stop axis A.

FIG. 2 shows various essentially U-shaped staples and strands 22 formed from them, which can be processed according to FIG. 1. The individual representations, each designated by a letter in FIG. 2, mean:

• a) a known U-shaped staple 20 , as is usually produced from round wire within a tamping tool, but is prefabricated according to the invention and fed to the tamping tool in the form of a strand 22 ,
• b) an approximately omega-shaped cramp 20 with barbs 24 at the ends of its two legs,
• c) a cramp 20 provided with barbs 24 at the level of its arch and having pointed legs,
• d) a staple 20 with a bulged curve,
• e) a staple 20 , the rounding of which is replaced by a ridge-shaped bend,
• f) a staple 20 with external teeth,
• g) a staple 20 with shafts 26 on its outside,
• h) a staple 20 with shafts 26 on its inside,
• i) a staple 20 , the legs of which each have a tip 28 ,
• j) a strand 22 composed of a plurality of staples 20 adhering to one another, for example connected by a lacquer layer, which have one of the forms a) to i),
• k) a staple 20 which tapers in the area of its rounding,
• l) a strand 22 of staples 20 according to k),
• m) a staple 20 which tapers towards the ends of its legs, and
• n) a strand 22 of staples 20 according to m).

Compared to staples of the usual shape a), which are only made of round wire in the tamping machine, staples of shapes b) to i) have the advantage that, depending on the material of the associated brush body 12, they increase the bundle holding force and improve the bundle position, the Bundle appearance and the hole filling can contribute. A nicer bundle and a better hole filling also results in the shape according to k) and l), while the shape according to m) and n) in turn improves the anchoring. The tapering according to k) and l) as well as according to m) and n) are shown in the example of the form a), but can also be applied to any of the forms b) to i). Above all, however, the production of the staples 20 outside of the tamping tool has the part before that the staples are designed so stiff and can be formed, for example, from hard wire of rectangular cross-section, that their legs no longer need to be crossed in the tamping tool in order to have one To form a noose. Rather, the prefabricated staples 20 , in particular with barbs, shoulders and changes in cross-section, without being changed in their shape, can be pushed together with the bristle bundle 16 into the brush hole 14 and thereby penetrate into the wall and / or floor thereof so that they become one Guarantee secure attachment of the bristle bundle.

According to FIG. 1, the lowest cramp 20 still connected to the strand 22 reaches a plane which contains the stop axis A in each working cycle. Along the stop axis A, a plunger 30 is movable back and forth, which in its next ar beitshub with its front end face 32 exerts a moderate pressure on the foremost, lowest in FIG. 1, cramp 20 , which releases it from the strand 22 and around it transversely to the stop axis A angeord Nete bristle bundle 16 lies around. With further movement in Rich direction to the brush body 12 , the plunger 30 together with ü union and therefore not shown mold jaws can cause the legs of the cramp 20 to be bent inwards and cross another as shown in FIG. 1, so that the cramp finally in shape a sling is pushed together with the boron bundle 16 wrapped around it into the associated bristle hole 14 and anchored in it. For the reasons mentioned, however, the formation of such loops in the prefabricated staples 20 is not absolutely necessary, so that the mold jaws mentioned are unnecessary.

Further details of the tamping tool used according to FIG. 1 are shown in FIGS . 3 and 4. The stuffing tool has a slide guide 34 , on which a slide 36 is guided to move back and forth in the direction of the stop axis A. The slide 36 carries at its rear, in Fig. 3 and 4 upper end a Bol zen 38 for connection to a drive element, which can be, for example, a connecting rod of a simple crank mechanism. At the front, in FIGS. 3 and 4, the lower end of the slide 36 , a tool head 40 is fastened, which can be of conventional design and is therefore not shown in detail. A ram channel 42 extends along the stop axis A through the slide guide, the slide 36 and the tool head 40 . The tappet channel 42 , insofar as it extends through the slide guide 34 , is delimited on one side thereof and has a first lateral inlet 44 in its lower region. In FIGS. 3 and 4 30 receives the plunger with respect to the slide 36 to a rest position a, in which the end face of the plunger is 32 immediately above the first lateral inlet 44 so that the front, in Fig. 3 furthest to the right is arranged Krampe 20 of the strand 22 is pushed into the tappet channel 42 and can be pressed therein by the tappet 30 during its next downward stroke.

Below, the slide 36 has a ge over its entire width extending second side inlet 46 , in which a bundle of bristles 16 is inserted during each working cycle. Transverse to this second side inlet 46 , a window 48 is formed in the slide 36 , into which a crescent-shaped bundle conveyor 50 can be moved. The bundle conveyor 50 has an outer contour in the form of an arc of a circle, which is interrupted by a notch 52 . Around the center of this circular arc, the bundle conveyor 50 can be pivoted back and forth in a plane parallel to the stop compartment A pa between an initial position in the region of the bristle supply 18 , where the bundle conveyor 50 with its notch 52 accommodates a bundle of bristles 16 , and which is shown in FIG 3 and 4, end position shown., the bristle bundles lying in the notch 52 16 transversely extending in the channel 42 by the plunger. In order that no bristles can fall out of the notch 52 on the way from the bristle supply 18 to the tappet channel 42 , the bundle conveyor 50 slides on this path with its outer contour on an arc-shaped concave counterpart 54 .

In accordance with Fig. 3 and 4 nor in height of the upper side a passage 44 standing in the plunger channel 42 Krampe 20, while the slider 36 is still stopped, pressed during the downward movement of the plunger 30 from the plunger down and over the side in the lower inlet 46 lying bristle bundle 16 scho ben. From the lower inlet 46 downward, the tappet channel 42 has a larger cross-section so that it can take up the bristle bundle 16 which, with the downward movement of the tappet 30 while the slide 36 is still stationary, moves downward from the notch 52 of the bundle conveyor 50 is pressed out and bent in a V-shape as shown in FIG. 1. As soon as the bristle bundle 16 has left the notch 52 , the bundle conveyor 50 is pivoted to the right according to FIG. 4 and is thereby pulled out of the window 48 . Subsequently, the slide 36 begins a downward stroke, which ends when the tool head 40 hits the brush body 12 . Meanwhile and afterwards, the downward movement of the plunger 30 in the plunger channel 42 is continued, the cramp 20 , if desired, from the arranged in the tool head 40 , not shown th mold jaws of the usual type looped around the bristle bundle 16 and finally together with this in the brush hole 14 aligned with the plunger axis A is pushed.

The tamping tool shown in FIGS . 3 and 4 has the special feature in comparison with conventional loop-forming tamping tools that a strand guide 56 opens into the first, in FIGS. 3 and 4 upper, inlet port 44 , in which the preformed staples 20 exist Strand 22 is guided. On the strand 22 acts in Fig. 3 with an arrow indicated feed force 58 , which ensures that in front of the first, in Fig. 3 the rightmost 20 of the strand 22 of the strand 22 through the side inlet 44 in the tappet channel 42nd arrives as soon as the plunger 30 has reached the top so that its end face 32 lies above this inlet 44 . The feed force 58 can be generated in a variety of ways, for example from a spring, a pressure-loaded piston or a driven roller arrangement, that is from devices, such as those used for example in bar-processing machine tools for bar feed.

The method, the sequence of which is shown schematically in FIG. 5, differs from that described above essentially in the type of cramps 20 used , which according to FIG. 5 can be anchors of conventional rectangular shape, but - in this respect comparable to those according to FIG. 1 used staples 20 - not first punched in the tamping tool, but in a prefabricated state, again in the form of a strand 22 of stacks stacked on top of one another, supplied.

In FIG. 6, various forms of straps 20 are illustrated, which have been punched out of flat material and forming a strand 22. In detail, Fig. 6

• a) a staple 20 of the usual rectangular anchor shape
• b) a strand 22 of chains arranged one behind the other, prefabricated staples of the form a), which are only held together loosely, for. B. by a varnish coating,
• c) a strand 22 of staples 20 of the customary rectangular shape, which, however, are stacked, glued or notched in a full-surface manner adjacent to one another in accordance with FIG. 5 and in this respect comparable to FIG. 1,
• d) a staple 20 , which, like all the other staples shown in FIG. 6, is punched out of flat material and is intended for use in the manner of conventional anchors, but has a hint of a U-shaped outline,
• e) a strand 22 comparable to b), chain-like, composed of staples 20 of the shape d),
• f) a strand 22 of staples 20 of the form d) stacked comparable to c),
• g) a staple 20 of I-shaped outline,
• h) a cramp 20 of plano-concave outline,
• i) a cramp 20 of biconcave outline,
• j) a staple 20 of K-shaped outline,
• k) a staple 20 of a T-shaped outline,
• l) a chain-like strand 22 of staples 20 of the form k)
• m) a staple 20 of D-shaped outline,
• n) a strand 22 of staples 20 of the shape m) arranged one behind the other in chain form
• o) a cramp 20 of approximately U-shaped outline with barbs on its legs,
• p) a chain-like strand 22 formed from staples 20 of the shape o),
• q) a staple 20 of simple, c-like outline,
• r) a chain-like strand 22 of staples 20 of the shape q)
• s) a staple 20 , the outline of which includes a trapezoid on a flat rectangle,
• t) a chain-shaped strand 22 of staples 20 of the shape s),
• u) a staple 20 , the outline of which is formed by two superimposed trapezoids, and
• v) a strand 22 of ge stacked staples 20 of the form u).

From Fig. 6 it can be seen that all the forms of staples with the exception of the form u) optionally stacked or chain-like one behind the other
who can form a strand 22 . On the other hand, from staples of the form u), only a stacked strand 22 can be formed without additional aids.

The tamping tool shown in FIGS . 7 and 8 is used to process a strand 22 which , in accordance with the representations c), f) and v) in FIG. 6, is formed by stacked anchor-shaped staples 20 . Otherwise, the stuffing tool according to FIGS . 7 and 8 is largely the same as that shown in FIGS . 3 and 4. The processed according to FIGS . 7 and 8, anchor-like staples 20 are not bent in the tool head 40 but, as they have been removed from the strand 22 , pressed into a brush hole 14 each.

The process sequence according to FIG. 9 differs from that shown in FIG. 5 in that a strand 22 is processed which corresponds to the representations b), e), l), n), p), r) or t) in FIG . 6 is formed like a chain of consecutively arranged straps 20. In this respect, the stuffing tool according to FIGS . 10 and 11 differs from that shown in FIGS . 7 and 8. According to FIGS. 9 to 11, the strand 22 is fed to the tamping tool in a plane containing the stop axis A, ie upright.

Claims (10)

1. A method of stuffing brushes, in which

• - having a brush body (12) of the brush holes (14) is brought into a position in which a brush hole (14) is aligned with a Stopfachse (A),
• an approximately flat cramp ( 20 ) is arranged in a plane containing the stop axis (A),
• - A bristle bundle ( 16 ) from a bristle stock ( 18 ) and is arranged transversely with respect to the stop axis (A) between the position of the staple ( 20 ) and the brush hole ( 14 ),
• - The staple ( 20 ) along the stop axis (A) against the bristle bundle ( 16 ) is pressed, this being bent into a V-shape, and
• - The bristle bundle ( 16 ) with the staple ( 20 ) is pushed into the brush hole ( 14 ) and anchored therein, characterized in that
• a strand ( 22 ) of preformed staples ( 20 ) is produced,
• - The strand ( 22 ) is fed symmetrically with respect to a plane containing the stop axis (A) and
• - The foremost cramp ( 20 ) is separated from the strand ( 22 ) by being moved against the bundle of bristles ( 16 ) lying across the stop axis (A).

2. The method according to claim 1, characterized in that the strand ( 22 ) is formed by staples ( 20 ) stacked parallel to one another. 3. The method according to claim 1, characterized in that the strand ( 22 ) of chain-like arranged staples ( 20 ) is formed. 4. The method according to any one of claims 1 to 3, characterized in that the strand ( 22 ) is formed by directly adhering cramps ( 20 ). 5. The method according to any one of claims 1 to 4, characterized in that the staples ( 20 ) for forming the strand ( 22 ) are bent approximately U-shaped from wire. 6. The method according to any one of claims 1 to 4, characterized in that the staples ( 20 ) for forming the strand ( 22 ) are punched out of a tape. 7. The method according to claim 5 or 6, characterized in that the staples ( 20 ) are provided with barbs ( 24 ). 8. The method according to any one of claims 5 to 7, characterized in that the cramps ( 20 ) are provided with waves ( 26 ). 9. The method according to any one of claims 5 to 8, characterized in that the cramps ( 20 ) taper in the direction of the stop axis (A). 10. tamping tool for performing the method according to one of claims 1 to 9 with

• - a brush holder ( 10 ) for holding a brush body ( 12 ) provided with brush holes ( 14 ) and for aligning a brush hole ( 14 ) with a stop axis (A),
• a slide ( 36 ) which can be moved back and forth on a slide guide ( 34 ) in the direction of the stop axis (A) and carries a tool head ( 40 ) which can be placed on the brush body ( 12 ),
• - A tappet channel ( 42 ) running along the stop axis (A) through the slide ( 36 ) and the tool head ( 40 ), which has a first side inlet ( 44 ) for staples ( 20 ) and a second side inlet ( 46 ) for bristle bundles ( 16 ) has
• - A bundle conveyor ( 50 ) for conveying a bundle of bristles ( 16 ) from a bristle supply ( 18 ) to the second lateral inlet ( 46 ) and
• - A plunger ( 30 ) which can be moved back and forth along the tamping axis (A) in the tappet channel ( 42 ) between a rest position in which it is retracted behind the first inlet ( 44 ), and a tamping position in which it is off protrudes from the tool head ( 40 ) to engage in a brush hole ( 14 ), characterized in that a strand guide ( 56 ) for feeding a strand ( 22 ) of preformed staples ( 20 ) opens into the first lateral inlet ( 44 ).