BE1023541B1 - BRUSH POT DEVICE - Google Patents

Abstract

A brush tufting device for tufting and securing tufts of bristles (20) in a brush body or an intermediate container provides that a tuft separator (10) has recesses (18) for tufts of bristles (20) on its outer circumference (16). In addition, a transfer tool (44) is provided which transfers the individual tufts of bristles (20) to a stuffing tool (12).

Description

The brush filling device

The invention relates to a Bürstenstopfvorrichtung for stuffing and fixing bristle tufts in a brush body. There are now various ways to attach bristle tufts in a brush body. The classic method is to fold an isolated bristle tufts in half and to fix it in the middle via a metal plate, called anchor, or a loop (usually a wire loop) in the opening in the brush body. The anchor then pushes or cuts into the wall of the opening, a loop typically in the bottom of the opening.

The brush darning device comprises a tuft singler which removes bristles from a bristle magazine in which large amounts of bristles lie next to one another and thereby separates them into tufts. This singulation is accomplished by having the tuft singler on its outer periphery one or more receiving recesses which line the edge of the bristle magazine so that bristles are forced into the receiving recess to form a tuft. This tuft is then moved out of the area of the magazine, where it is taken over by a stuffing tool. The tamping tool moves the tuft along a straight path directly to the brush body, folds it in advance, and abuts it with the bent end of the tuft together with the anchor or loop.

Another option for making brushes is to anchor the tufts in the brush body. In this case bristle tufts are either stuffed directly into the brush body or stuffed into an intermediate container and then pushed into the brush body or encapsulated end side to form the brush body. The attachment of the Bostenbüschel on pre-fabricated brush body is made e.g. by gluing, heating, welding and / or overmolding.

As a tuft singler so far mainly circular arc segment parts or discs are used, each having on their outer circumference, the receiving recesses. Circular arc segments are a kind of pivot lever, which are pivotable about an axis of rotation and at their the

Rotary axis remote outer circumference have a circular arc segment shape whose center is the axis of rotation. The circular arc segment becomes reversible, i. pivoted back and forth, between a separating position in which the receiving recess in the area of the magazine, and a transfer position, in which the preferably linearly movable stuffing tool takes over the scattered tuft. These circular arc segment-like tuft singles usually only take one tuft per stroke.

In order to increase the cycle rate, there are also cylindrical or disc-shaped tuft singlers which have a plurality of receiving recesses on their outer circumference and which are rotated only in one direction of rotation, i. do not drive in reversing mode. These tuft singles are always indexed step by step and immediately connect to the stuffing tool, which takes over the isolated tufts one after the other.

Object of the present invention is to provide a stuffing tool with anchor technology, in which the clock rate is increased and the stuffing quality is improved.

The Bürstenstopfvorrichtung invention for stuffing and fixing bristle tufts in a brush body comprises a tuft singler, which removes bristle tufts from a bristle magazine and at its outer periphery has at least one receiving recess for bristle tufts, which are further transported by rotating the tuft singler along a circular segment or a circular path. Further, the brushing device comprises a stuffing tool which moves tufts along a preferably rectilinear path, abuts an opening in the brush body and anchors the bristle tufts therein or abuts an opening in the tundish. In addition, a movable transfer tool is provided, the tuft takes the tuft singles, jams and transferred to the stuffing tool.

The invention provides that the movable stuffing tool does not itself, as was customary in the prior art, the isolated bristle tufts the tuft singles removes, but that here a takeover tool is interposed. Through this takeover tool, it is possible to grab the bristle tufts and hold them until the tamping tool actually clamps the tufts and has safely taken over. In previous ones

Stuffing devices, when transferring bristle tufts from the separator to the tamping device, had the problem that sporadically bristles had slipped during the takeover by the tamping tool, so that they protrude in the finished brush against the exactly aligned bristles. This leads to rework or rejects. This problem arises when expressing the bristle tufts from the separator and the takeover by the stuffing tool. The fact that the takeover tool holds the bristle tufts safely and removes the tuft singler can increase the clock rates.

The transfer tool can be reciprocated along a circular arc segment path between a receiving and dispensing position or along a linear path.

To securely hold the bristle tufts, at least one pair of pliers is provided on the transfer tool, which still clamps the bristle tufts in the receiving recess and moves them in a clamping manner to the stuffing tool.

The at least one pair of pliers can grasp the bristle tufts, in particular offset axially from the tuft singler, wherein they preferably adjoin the tuft singler, ie the disk or the circular arc, axially directly.

An embodiment of the invention provides that in each case at least one pair of pliers is provided axially on opposite sides of the tuft singler, which grip the bristle tufts in a clamping manner. Thus, each bristle tuft is detected with two pliers, which preferably clamp synchronously, are loosened and moved. These two pliers can e.g. immediately adjacent to the tuft singleton. The subsequent stuffing tool then grasps the bristle tufts between the tongs, so that they are finally held perfectly aligned in the tamping tool.

The at least one pliers can sit on a swivel arm or form part of it. For clamping itself, preferably only one arm of the forceps is moved while the other remains stationary.

The at least one pair of pliers can be e.g. in that it has two axially bent fingers, between which the tufts are clamped. This makes it possible to position the associated pivot arm slightly farther from the tuft singulator and from the tamping tool so as not to create space problems in these areas.

As previously explained, the tuft singler can only be rotated in one direction of rotation and is here e.g. be designed as a disc, wherein the receiving recesses circulate on a circular path. Alternatively, the tuft singler has a circular arc segment on the outer circumference and is pivoted back and forth. In this context, a tuft singler with a disk or a cylinder, which rotates in only one direction, with respect to the clock rate of advantage, because by further indexing in one direction eliminates the return stroke that occurs in a circular arc segment-like tuft singler. This also gives more time to grab the tufts exactly and pass them on.

The invention provides in a further improvement that a centering unit is provided which axially aligns the tuft taken out of the tuft singulator. This is to avoid that individual bristles protrude from the rest of the tuft.

The stuffing tool has e.g. a linear guide, along which the tufts are moved and stuffed, and a movable tongue, which pushes the tuft to be tufted and, if provided, the anchor or the loop into the opening. The tuft to be stuffed is moved by the tongue in the folded state. In the transfer point is preferably provided that the tongue clamps the bristle tufts and only then the takeover tool is opened and releases the tuft. This prevents individual bristles from partially slipping out of the tuft during transfer.

Preferably, the bristle tufts are first clamped in the tuft singler and then removed, wherein the clamping can also take place during or after removal, when the tuft is still guided axially.

Further features and advantages of the invention will become apparent from the following description and the following drawings, to which reference is made. 1 shows a perspective view of an embodiment of the brushing device according to the invention shortly before clamping a bristle tuft, FIG. 2 shows the brushing device according to FIG. 1 when clamping a bristle tuft, FIG. 3 shows a perspective view of the brushing device according to FIG 4 shows the brush-filling device in the position according to FIG. 3, but with partially cut-open pliers, FIG. 5 shows the brush-filling device according to FIG. 1 in a partially sectioned view in the region of the stuffing tool upon transfer of the bristle tuft 1, with already stuffed in the direction of brush body stuffing tool, - Figure 7, the Bürstenstopfvorrichtung of Figure 1 immediately before plugging into the opening of the brush body or the intermediate container, and - Figu FIG. 8 is a plan view of a prior art brush plugger. FIG.

Referring to Fig. 8, a prior art brush plugger is shown having a tuft singler 10 and a stuffing tool 12 immediately adjacent thereto.

The tuft singler 10 is in this case a reciprocally pivotable crescent-shaped part 14 which has on its outer circumference 16 a circular arc segmental shape with center on the pivot axis of the tufts singler 10. At the outer periphery 16 a receiving recess 18 in the part 14 is formed, which is adapted to receive a single bristle tufts 20 dimensioned. A guide 22 adjoins the part 14 and has a concave, the outer circumference 16 adapted surface 24 along which the part 14 at the

Move movement towards the stuffing tool 12 along and prevents falling out of bristle tufts from the receiving recess 18.

A bristle magazine 26 also adjoins the outer periphery 16 and has bristles parallel to one another. The magazine is biased to push bristles against the outer periphery 16.

The tamping tool 12 has a linear guide 28 along which bristle tufts are transported to a brush body 30 or intermediate container 31 having prefabricated openings into which bristle tufts are stuffed.

The brush body may either be the complete, non-brushed part of a brush, e.g. with handle, neck and head, or he may also be only part of the brush, for example, a small plate with openings, which is then encapsulated or inserted into a prefabricated carrier, glued or welded there. All of these variations of brush bodies with openings are replaceable for the below and previously mentioned invention.

An intermediate container 31 is usually a metal carrier with openings which are arranged according to the tuft pattern of the later brush.

The stuffing tool 12 also has, in addition to the linear guide 28, a tip 32 with a channel 34 formed therein, and a so-called tongue 36, e.g. has the shape of a long, flat rod that can penetrate into the channel 34.

The operation of this brush darning device is briefly explained below, because the basic principle also applies to the present invention, which, however, has improvements over this prior art.

Once the tuft singler 10 is pivoted counterclockwise with its part 14 to the right, the receiving recess 18, which is empty at this time, enters the region of the magazine 26, so that due to the resulting gap individual bristles are pressed into the receiving recess 18, until it is full. The thus separated bristle tufts 20 is then transferred during pivoting in a clockwise direction along the guide 22 to the tamping tool 12, here up to a transfer point 38. In this position, the tuft singler 10 stops momentarily. Subsequently, the tongue 36 is moved to the left. It takes an anchor 40 or a wire loop, which has been previously produced, for example, in a wire cutter. The tongue 36 with the armature 40 or the wire loop led in front of it presses against the present bristle tufts 20 at the transfer point 38 and folds this into two substantially equal halves and pushes them into the channel 34.

The tip 32 then moves to the left towards the brush body 30, and the tongue 36 makes this movement at least at the same speed. The tip 32 either stops immediately before the brush body 30 or touches it. Thereafter, the tongue 36 presses the bristle tufts with the folded end together with anchor 40 or wire loop in the opening in the brush body 30th

The brush darning device explained below with reference to FIGS. 1 to 7 will now be explained, wherein identical or functionally identical parts to the brush darning device described in the prior art according to FIG. 8 are provided with the same reference numerals. In the following, the differences to this prior art are then carried out.

In Fig. 1, the bristle magazine 26 is not visible, but it is carried out according to FIG. 8 and directly adjacent to the tuft singler 10, which is designed here as a disc 114 which has numerous receiving recesses 18 on its circular cylindrical outer periphery 16. In the receiving cavities 18 bristles are singulated into bristle tufts 20 and in the direction of the arrow along the guide 22, i. along a circular arc, transported in a so-called receiving position for a downstream transfer tool 44.

In Fig. 1, the transfer tool 44 is also in the receiving position in which it receives a transported bristle tufts 20.

The transfer tool 44 serves to pick up bristle tufts 20 from the tuft singler 10, to clamp them on the tuft singler 10 and then to transport them to the tamping tool 12.

The transfer tool 44 is pivotable about a pivot axis 46 from a receiving position (see FIG. 1) to a delivery position (see FIG. 5). In the receiving position, a bristle tuft 20 is picked up by the tuft singler 10, and in the dispensing position, this picked tuft 20 is delivered to the tamping tool 12.

The transfer tool 44 comprises at least one, in the present case two axially superimposed, about the pivot axis 46 pivotable pliers 48 (see in particular Fig. 3).

Each pliers 48 has an arm 50, which is designed as a kind of support arm and is directly coupled to the axle 46. In addition, a clamping arm 52 is provided for each pliers 48, wherein the clamping arm is pivotally coupled via a pin 54 with the support arm 50.

The clamping arm 52 is e.g. via its own pivoting drive, such as a servo motor, pivoted about the pin 54 relative to the support arm 50 to clamp bristle tufts 20 between the arms 50, 52. Together, the arms 50, 52 are pivoted in a constant relative position to each other in the dispensing position about the axis 46 to a transfer point. Alternatively, on the axis 46, a cam plate 53 rotatable separately from the arm 50 can control the deflection of the arm 52 via a cam follower 55 mounted on the arm 52.

Preferably, there is a common drive for both pliers 48, which pivots these simultaneously and synchronously about the common axis 46 between receiving and dispensing position. In addition, a common drive for the two clamping arms 52 may be provided in order to pivot between an opening and a clamping position. For each forceps 48 is that the two arms 50, 52 which project radially from the axis 46, at their ends axially bent fingers, each facing the disc 114, have.

The tongs 48 are on opposite sides (top and bottom) of the tuft singler 10, more specifically, the disc 114th

In an illustrated embodiment, the respective support arm 50 forms a pivoting arm about the axis 46. Alternatively, the pliers 48 may of course also be seated on a separate pivoting arm, so that the support arm 50 need not be pivot arm at the same time.

The two fingers of each pair of pliers 48 are best shown in FIGS. 3 and 4, wherein in Fig. 4 in each case a finger of a pair of pliers 48 is shown partially cut away.

The finger, which is connected to the support arm 50, is designed as a receiving finger 60, which has an axial, i. in the bristle longitudinal axis and in the direction of the axis 54 extending slot 62 which tapers transversely to the axial direction in the retraction direction R of the bristle tufts. At an angle of about 90 ° as seen in the axial direction A (see Fig. 3), the finger 60 has a lateral recess 64 into which a laterally angled end 66 of a clamping finger 68 can penetrate (see Fig. 3). The clamping finger 68 is coupled to the clamping arm 52.

In the receiving position, the receiving fingers 60 are just above and below the edge of the disc 14. The slot 62 of each receiving finger 60 is aligned in the direction of rotation to the receiving recess 18 and thus to the incoming bristle tufts 20 in the retraction direction R, so that the incoming bristle tufts 20, without the side to proceed, is moved directly at its opposite end portions in the receiving slots 62. This is shown in FIG. In this position, the clamping arm 52 is pivoted away, so that the cranked end 66, as shown in FIG. 1, is removed from the clamping position and the incoming tuft 20 is not in the way.

Subsequently, as shown in Fig. 2, each clamping arm 52 is pivoted so that the respective bent finger 66 penetrates into the recess 64 and the bristle tufts 20 laterally against the finger 60 presses and jammed. This clamping then takes place laterally, preferably at right angles to the retraction direction R of the tuft in the slot 62 of the finger 60th

The bristle tufts 20 is thus clamped at opposite end regions and moved out of the receiving recess 18 in this already clamped state (see FIG. 3).

The pressing against the tuft 20 portion of the bent end 66 may, as shown in FIG. 4, be concavely rounded in order to achieve the desired tuft cross-section. Also, the end in the retraction direction end of the slot 62 may be rounded to also, for example. to provide a circular tuft cross-section.

Thus, at both ends, the bristle tufts 20 are pivoted into the dispensing position shown in FIG. 5. Alternatively, the takeover tool may also have a linear path along which the singulated bristle tufts 20 are moved to the tamping tool.

When retracting the incoming bristle tufts 20, the tool tip 32 has briefly moved to the left to make room for the incoming bristle tufts 20. Subsequently, the tool tip 32 is moved back again, close to that in the dispensing position, i. bristle tufts 20 located in the transfer point.

Now the tongue 36 is moved against the tuft 20 with the anchor 40 or wire (if present), not shown here for clarity, and the tuft is folded into the channel 34 which has a V-shaped inlet portion at the tuft-like end.

In Fig. 6, the folded tuft 20 can be seen in this inlet section of the channel 34.

As soon as the tongue 36 contacts the bristle tuft 20 with the previously pushed anchor, the clamping arm 52 again moves into the open position, so that the clamping is released. When pulling out the bristle tufts 20 from the slots 62 by the further advancing tongue 36, the tuft is thus no longer clamped in the transfer tool 44.

Even while the tool tip 32 with its bristle tufts 20 and with the tongue 36 is moved in the direction of the brush body 30, the transfer tool 44 pivots back to the tuft singulator 10, see FIG. 6.

In the position shown in Fig. 7, the tool tip 32 has reached the brush body, and the tongue 36 still continues to push the bristle tufts 20 into the opening in the brush body or Zwischenbhälter 31.

In the Fign. 5-7, the linear guide 70 for the tool tip 32 and the linear guide 72 for the tongue 36 is clearly visible.

It should be emphasized that the illustrated brush device according to the invention can alternatively cooperate with a tuft singler according to FIG. 8.

In addition, a stuffing tool can be provided, which is not moved along a rectilinear path, but along a circular path.

If a brush is made without an anchor and without a wire loop, the bristle tufts is usually folded unfolded with one end in the brush body or an intermediate container 31 with openings. The hole pattern in the intermediate container 31 corresponds to that of the brush body, so that all bristle tufts from the intermediate container 31 can be pushed into the adjacent brush body. Alternatively, the intermediate container 31 serves as a mold half of an injection mold, so that the protruding from the intermediate container bristle tufts are encapsulated to form the brush body and connected to the brush body.

So that the bristle tufts 20 are aligned in the axial direction and no bristles project axially relative to the tuft, a centering unit 80 is provided. This centering unit 80 aligns the bristles of a bristle tuft 20 and thus, so to speak, the entire bristle tufts in the axial direction, so that the tongue 36 actually engages in the middle of the axial length of the bristle tufts 20 at this.

The centering unit 80 may, for example, be an active moving unit that presses axially and / or upwardly on the bristle tufts, or it may be a passive unit.

In the illustrated embodiment, the slot 62 of the receiving finger 60 of the lower tongs 48 has a front lower end in the form of an upwardly facing end wall (see reference numeral 80 in Figure 7) which closes the slot 62 downwardly. This end wall is designed as a ramp surface, which drops down to the front insertion end of the slot 62. The bristle tufts 20, which enters into the slot 62, slides with its bristles up this ramp surface, so that after reaching the end of the slot 62 all bristles are at the same height. Maybe you can still press from above.

Alternatively, below the guide 22 is a bearing surface 100, e.g. provided on a plate along which the tufts slide along their lower end and align axially. Also, above the guide 22, such a contact surface 100 may be present, so that the tuft would then be guided up and down to align all bristles axially equal.

Furthermore, it may be useful to make a contact surface 100 movable, as indicated in Fig. 1 by arrows, so that the surface taps against the tuft to move the bristles within the tuft easier to each other.

Claims (14)

claims A brush stopper device for tamping bristle tufts (20) into a brush body (30) or an intermediate holder (31), comprising a tuft singler (10) removing bristle tufts (20) from a bristle magazine (26) and at least at its outer periphery (16) a bristle tuft receiving recess (18), the bristle tufts (20) being conveyed along a circular segment or arc by rotation of the tuft singler (20), a stop tool (12), the bristle tufts (20) along one, preferably rectilinear, trajectory and pushes into an opening in the brush body (30) or in the intermediate support (31) and the bristle tufts (20) anchored therein, and a movable takeover tool (44), the bristle tufts (20) the tuft singler (10) extracts , clamped and transferred to the stuffing tool (12). 2. Brush darning tool according to claim 1, characterized in that the transfer tool (44) moves along a circular segment track or a linear path between a receiving and a dispensing position back and forth. 3. Bürstenstopfvorrichtung according to claim 1 or 2, characterized in that the transfer tool (44) has at least one pliers (48) which still clamps the bristle tufts (20) in the receiving recess (18) and moves by clamping to the stuffing tool (12). 4. Bürstenstopfvorrichtung according to claim 3, characterized in that the at least one pliers (48) axially offset from the tuft singler (10) can detect the bristle tufts (20) to be removed. 5. brushing device according to claim 3 or 4, characterized in that axially on opposite sides of the tuft singler (10) each at least one pliers (48) is provided which engages the bristle tufts (20) to be removed by clamping. 6. brush darning device according to one of claims 3 to 5, characterized in that the at least one pliers (48) sitting on a pivot arm or part thereof forms. 7. brushing device according to one of claims 3 to 6, characterized in that the at least one pliers (48) has two axially bent fingers (60, 68), between which the bristle tufts (20) is clamped. 8. brushing device according to one of claims 2 to 7, characterized in that the takeover tool (44) in the receiving position has a slot (62) into which the bristle tufts (20) from the tuft singler (10) is transported directly, in particular that the transfer tool (44) the tuft in the slot (62) transverse to the direction of retraction of the bristle tufts (20) in the slot (62) clamped. 9. brushing device according to claims 7 and 8, characterized in that a finger (60) has the slot (62) and the other finger (68) transversely thereto in a recess (64) of the slot (62) provided finger ( 60) can engage to clamp the bristle tufts (20). 10. brushing device according to one of the preceding claims, characterized in that the tuft singler (10) rotated only in one direction and the receiving recesses (18) rotate on a circular path or that the tuft singler (10) forms a circular arc segment on the outer periphery (16) and out - and is pivotable. 11. brushing device according to one of the preceding claims, characterized in that a centering unit (80) is provided, which aligns the bristle tufts (20) to be taken out of the tuft singler (10) axially. 12. brushing device according to claim 11, characterized in that the centering unit (80) is an axially acting bearing surface on the transfer tool (44) or along the movement path of the bristle tufts in the tuft singler (10). 13. brushing device according to claim 12, characterized in that the centering unit (80) has an axially moving support surface which knocks against the bristle tufts (20). 14. brushing device according to one of the preceding claims, characterized in that the stuffing tool (12) has a linear guide (70), along which the bristle tufts (20) are stuffed, and a movable tongue (36) which to be stuffed bristle tufts (20 ) enters the opening.