CN113056219A

CN113056219A - Beam splitter for a brush tamping tool and method for splitting a bundle of bristles

Info

Publication number: CN113056219A
Application number: CN201980072607.1A
Authority: CN
Inventors: 巴尔特·杰勒德·布舍里; 亨克·范登布斯切
Original assignee: GB Boucherie NV
Current assignee: GB Boucherie NV
Priority date: 2018-11-08
Filing date: 2019-11-07
Publication date: 2021-06-29
Also published as: TW202031175A; DE102018127984A1; WO2020094782A1; EP3876789A1; EP3876789B1

Abstract

A beam extractor (20) is arranged in the beam splitter of the brush tamping tool, and can be reversibly pivoted around an axis between a transfer position and a pivoted-back position. The recesses (38) for receiving the bristles (26) are oversized so that more bristles are received than would be present in the tufts. In the forward run, excess bristles (26) are pushed back from the recess into the bristle magazine (24).

Description

Beam splitter for a brush tamping tool and method for splitting a bundle of bristles

Technical Field

The invention relates to a bristle separator for a brush-setting tool, comprising a tuft extractor which can be pivoted back and forth about an axis between a transfer position and a pivoted-back position on the setting tool and which is simultaneously moved along a bristle magazine with an outer side and a recess present therein and receives a tuft from the bristle magazine in the recess.

Furthermore, the invention relates to a method for separating tufts for a brush-packing tool.

Background

In the prior art, such a beam splitter always comprises a plate-shaped beam extractor with a circular-arc-shaped outer side, which can be reversibly pivoted about a vertical axis. The cycle rate of such a hair beam separator steadily increases while the rejection rate decreases, which is in itself contradictory. The bristle magazine comprises upright bristles which are prestressed in a longitudinal direction transversely to the bristles, so that the bristles in the bristle magazine are pushed towards an open side of the bristle magazine, which is limited by the outer side of the tuft extractor. In this case, the prestress of the bristle magazine ensures that the bristles are pushed into the recess when the recess is moved along the open side. The brush manufacturer specifies a certain maximum tolerance for the bristles to be separated, for example, 5 to 10% more or less than the desired number of bristles per tuft. If, for example, 20 bristles must ideally be removed, 18 to 22 bristles can be separated and transported further for packing in order to meet tolerances. However, the high cycling rate increases the speed at which the notch moves along the open side, and thus the time to fill the notch is less. This presents a higher risk: even if the cross-section of the recess is designed to be just to the maximum tolerance (i.e. to accommodate 22 bristles in the above example), there are far fewer bristles entering the recess than are required.

Disclosure of Invention

The invention aims to: a beam splitter is provided that has high reliability when filling a notch at a high cycle rate. Furthermore, a correspondingly improved method for separating the hair bundles is provided.

The above object is achieved by a beam splitter of the above type, wherein there is a push-out device configured to: during the separation process, the ejection device reduces the cross section of the recess over the section over which the recess moves along the open side of the bristle magazine and ejects the bristles from the recess back into the bristle magazine. The invention is provided with the following steps: an oversized recess is used by means of which more bristles than are desired can be removed more easily from the bristle store. This ensures that more bristles are inserted into the recess than allowed by the upper tolerance limit of the packing process. This ensures that there are not too few bristles entering the recess compared to the prior art. After the bristles in the bristle magazine have been subjected to resistance, the remaining cross section can be completely filled with bristles when the bristles are pushed back out of the recess, whereby a relatively precise number of bristles can also be predetermined, which are finally fed into the filling tool. By means of the invention, higher cycle rates can be operated with very high reliability.

The "splitting operation" is not an adjustment process for reorienting and adjusting the beam splitter, but rather an ongoing operation in which the extractor is pivoted back and forth at the duty cycle rate of the beam splitter. In each cycle, the cross section of the recess is reduced by a separate ejection device, so that during forward pivoting (i.e. pivoting in the direction of the transfer position), or at a rear dead center position opposite the transfer position, or during pivoting back, after the recess has been filled beforehand, a portion of the bristles initially accommodated is pushed back into the bristle magazine. The filling itself always takes place during the pivoting back. If the path length pivoted back is long, it is conceivable to fill the recess in a first part of the path length and to push the bristles back into the bristle magazine in a second part of the path length. Furthermore, it is of course also possible, for example, to already push some bristles back in the final phase of the pivoting back and then to push the remaining excess bristles into the magazine in the dead center position and/or during the pivoting forward.

Preferably, however, the excess bristles are pushed out of the recess only during the forward pivoting (i.e. when pivoting in the direction of the transfer position) so that there is sufficient time to accommodate the bristles during the pivoting back. Preferably, the cross-section is continuously reduced during forward or backward pivoting, i.e. no sudden movement occurs, but a continuous cross-section reduction is achieved by means of a movement path. This precludes bristle jamming.

The push-out device may be a movable part fixed to the binder, which movable part is partly movable onto the recess, wherein "up" does not necessarily mean that the movable part is located above the recess; the movable part may also be located below the recess or in the slit of the beam extractor. In general, the movable part and the recess overlap in a plan view of the tuft holder, so that the (free) cross-section for accommodating the bristles is smaller in a plan view.

The movable member may optionally be moved by a drive remote from the beam extractor. I.e. the driver is not located on the beam extractor, but outside the beam extractor. Thereby reducing the mass of the moving parts.

One alternative here is: the drive contains a stationary or driven curve along which the driver moves. The driver is coupled to the movable member. The bend is configured such that the movable member partially closes the notch on the beam extractor during forward pivoting. A stationary curve is realized, for example, by a cylindrical rail along which the driver moves. The respective curves have different portions, having different distances from the axis of the beam extractor, about which the beam extractor pivots. Thereby, the movable member can move as follows: the movable member presses against the bristles in the recess during forward pivoting. However, the curve can also be driven, i.e. rotated by the drive itself, in order to guide the movable part in this rotation by mechanical coupling with the movable part radially outward.

The movable part being in particular a pivoting lever or a reversibly movable push rod

For example, rollers moving along curves are used as the driver.

Another alternative of the ejection device is realized in a simple manner: a stationary diverter is used. The deflector is arranged in the region of the open side of the bristle magazine and in a plan view of the tuft holder in such a way that it increasingly overlaps the recess during forward pivoting. That is, if the recess travels forward on the circular track occupied by the pivoting of the tuft extractor, the deflector increasingly obstructs the recess (more precisely, the bristles protruding from the recess) so that the bristles move against the deflector and the deflector with its deflector face pushes the bristles moving on the circular track back out into the bristle magazine.

The deflector may have a convexly curved deflector face against which the bristles in the recess move during pivoting forward or back, and which extends obliquely into the trajectory of movement of the bristles in the recess. The convex curvature is in particular a continuous curvature, i.e. the portion of the deflector face which is in contact with the bristles is free of steps or corners.

The ejection device can be designed such that the recess opens gradually during the pivoting back, preferably completely after an initial at least partial opening even in the pivoted-back position.

A variant of the invention provides: the ejection device causes the cross section of the recess to change equally when pivoting forward and back. This means that during pivoting back the notch is initially smaller and then larger than at the location of subsequent pivoting back. During forward pivoting, the notch then decreases again to the same extent. However, another variant of the invention provides that: the course of the change in the cross section of the recess is different during forward pivoting and during backward pivoting. In particular, the notch is always completely open during the back pivoting, and decreases only during the forward pivoting. This makes it easier to fill the recess.

The method for separating tufts for a brush tamping tool according to the present invention can be implemented using a bristle splitter according to the present invention. The method is characterized by the following steps:

providing a tuft extractor which is pivotable back and forth about an axis between a transfer position on the tamping tool and a pivoted-back position and which simultaneously moves with the outer side and the recess present therein along the bristle magazine,

filling the recess with bristles from a bristle magazine during pivoting back, and

the bristles are pushed from the recess back into the bristle magazine during the separating operation of the extractor, in particular during the forward pivoting.

Accordingly, the method according to the invention sets: the recess is said to be "overfilled" and contains more bristles than necessary in order then, by pushing out, to obtain the correct number of bristles for the tuft.

The recess is preferably completely open, for example during pivoting back (i.e. at least in the completely pivoted-back position), in order to accommodate sufficient bristles there.

For example, during the separation operation, in particular during forward pivoting, the cross-section of the recess is reduced by at least 10%, preferably at least 15%, to ensure that in practice too many bristles are initially accommodated in the recess. This of course also applies to the beam splitter according to the invention.

In general, all of the above-described features of the hair beam splitter apply to the method as well, or vice versa.

Drawings

Other features and advantages of the present invention will be obtained from the following description and the referenced drawings. In the drawings:

FIG. 1 shows a simplified schematic top view of a brush tamping tool having a beam splitter according to the present invention, which is only partially shown;

FIG. 2 shows a top view of a first embodiment of a beam splitter according to the present invention;

FIG. 3 shows a top view of a second embodiment of a beam splitter according to the present invention;

FIG. 4 shows a top view of a third embodiment of a beam splitter according to the present invention;

FIG. 5 shows an enlarged detail of the beam splitter according to FIG. 2;

FIG. 6 shows successive steps implemented by the beam splitter according to FIG. 2 for implementing the method according to the invention;

fig. 7 shows six successive steps implemented by the beam splitter according to fig. 4 for implementing the method according to the invention.

Detailed Description

Fig. 1 shows a beam splitter 10 of a tamping tool 12 comprising a tip 14 which is reciprocally movable in the direction of arrow X. The tongue 16 serves to push the bristle tufts past the tip and into the bristle carrier 18. An anchor, not shown, which is pushed in with the tufts by the tongue 16 serves to anchor the tufts in the bristle carrier 18.

The hair beam splitter 10 comprises a so-called beam extractor 20, which beam extractor 20 is pivotable to and fro about a preferably vertical axis a, i.e. pivoting forward means pivoting in the direction of a transfer position in which the separated hair beam is accommodated in a recess 22 in the tucking tool 12. The back pivot is a pivot in the opposite direction, i.e. away from the tip 14 until a rear dead center, referred to as the pivot back position.

Adjacent to the tuft holder 20 is a bristle magazine 24, against which bristles 26, which are upright and are loaded in the direction of the arrow Y, are pressed in the direction of an open side 28 of the bristle magazine 24. In this region, the bristles 26 may press against the outside 30 of the extractor 20.

The outer side 30 is at least partially, preferably completely, in the shape of a circular segment having a radius extending to the axis a.

Fig. 2 shows a scraper 32 which is located between the bristle magazine 24 and the transfer position in the pivoting direction and has an opposing surface 34 which is substantially complementary to the outer side 30. The gap between the outer surface 30 and the opposite surface 34 is minimal and in any case significantly smaller than the bristle diameter.

The outer side 30 has a recess 38 for receiving bristles, which extends from the outer side.

As the recess 38 travels along the open side 28 of the bristle magazine 24, the bristles are pushed into the recess 38. The recess is then more or less filled.

The cross section of the recess 38 matches the number of bristles to be separated for each tuft, making the cross section too large. Thereby ensuring that during pivoting always more bristles enter the recess 38 than have to be released afterwards.

Once the recess 38 reaches the open side 28, pivoting back begins to fill the recess 38 with bristles 26. Until the pivoted back position is reached, and also when pivoted forward thereafter, more bristles can be pushed into the recess 38.

However, an ejection device 40 is provided, which ejection device 40 serves to push excess bristles from the recess 38 back into the bristle magazine 24 during forward pivoting in the direction of the filling position.

Fig. 2 shows a purely stationary ejection device 40, which is essentially formed by a stationary, i.e. fixed and not together pivoting deflector 42, which deflector 42 has a deflector face 44 which extends radially inward from the outer side 30 in plan view and is convexly curved.

Fig. 5 shows a diverter 42 and a portion of a diverter face 44. In addition, the different positions of the recess 38 can be seen, which the recess takes up when pivoting forward as well as when pivoting back.

It can be clearly seen that the deflector 42 moves partially into the trajectory of movement of the recess 38 and hence of the bristles 26.

If the recess 38 is still relatively far to the front (left in fig. 5), the deflector 42 is in this region, so that the deflector 42 partially closes the recess 38. However, as one moves further back in the direction of the pivoted-back position (to the right in fig. 5), the deflector surface 44 extends radially gradually inward, so that the deflector 42 closes the recess 38 less and less.

The curvature of the diverter surface 44 is continuous, without abrupt changes or corners.

The method by which the exact number of bristles for a bristle tuft is removed from the bristle magazine 24 is explained below.

As the extractor 20 pivots back, the recess enters the area of the open side 28 of the bristle magazine 24, pushing the bristles 26 into the recess 38. As the pivoting back position is progressively pivoted, the cross-section of the recess 38 becomes larger and larger, so that more and more bristles 26 are pushed in.

The entire recess 38 is not opened until or in the pivoted-back position. This is not to be construed as limiting. In fig. 5, the bristle bundles produced in the rightmost position of the recess 38 are shown with the distance between the bristles from one another and from the recess wall being exaggerated for the purpose of better recognition of the limits of the individual components only. In fact, the bristles are also placed tightly in the completely open recesses here.

If fewer bristles are to be picked up per tuft, the deflector 42 can also be variably adjusted and open up less cross-section in the pivoted-back position.

During the separation, here during the movement in the direction of the tip, i.e. during the forward pivoting, the bristles 26 come into contact with a deflector surface 44, which deflector surface 44 extends obliquely into the path of movement of the bristles 26 in the recess 38. Due to this inclination, the excess bristles in the recess 38 are pushed back into the bristle magazine 24.

Then when the recess 38 reaches the scraper 32, the recess 38 is closed and the tufts are carried along the opposite surface 34 to the tip 14.

The same tuft extractor 20 may be used if fewer tufts of bristles are to be separated. In this regard, the deflector 42 can be adjusted radially outward in the direction of the arrow Z, manually or by means of a motor, so that the deflector 42 can cover the recess 38 even more strongly.

In the embodiment of fig. 3, the ejection device 40 is not constituted by a purely stationary part. But the movable member, here the push rod 50, is fixed to the beam extractor 20 radially movably via a support 52. The push rod 50 is preferably loaded radially inwardly towards the axis a by a spring.

On the inner end of the push rod 50, it carries a driver 54 in the form of a roller which runs on a curve 56. The curve 56 includes portions that are further from and closer to the axis a. The push rod 50 is pushed more or less outwards by the portions of the curve 56 at different distances from the axis a. The push rod 50 can thus partially close the recess 38, on which the push rod 50 is located.

The curve 56 is also continuously curved without sudden abrupt cross-sectional discontinuities, corners or the like.

As shown in fig. 5, the cross-sectional profile of the recess 38 here also has: the cross-section of the recess 38 continuously decreases as it pivots forward.

The push rod 50 can also optionally open the entire recess 38 in the pivoted-back position, although optionally the entire recess 38 can also be opened before.

Other cross-sectional profiles can also be achieved by changing the position of the curve 56 or via another curve.

Another way to control the movable part (here the push rod 50) is: during movement of the beam extractor 20, the bend 56 and the corresponding portion 60 likewise move and pivot. Other orientations for the cross-sectional variation of the recess 38 are also possible here.

The embodiment of fig. 4 corresponds substantially to the embodiment of fig. 3. Instead of the push rod 50, there is provided a lever 62 as a movable member, which is mounted on a pivot 64 on the beam extractor 20. The lever 62 is configured with two arms and has an arm which carries the driver 54 and by means of which the driver 54 travels along the curve 56. Depending on the position of the catch 54, the other arm is pivoted more or less onto the recess 38 in order to more or less open or close the recess.

Of course, the curve and the corresponding portion 60 can here not only be stationary as shown in fig. 3, but also be movable by itself when pivoting or be adjustable outwards when tufts with other cross sections are to be produced.

In all embodiments, the cross-sectional area of the recess between the most open position (typically the pivoted back position) and the most closed position of the recess 38 is reduced by at least 10%, in particular by at least 15%.

Six successive partial drawings in fig. 6 show different positions of the beam extractor 20 in the embodiment according to fig. 2, as can be clearly seen: the push-out device 40 remains stationary while the extractor 20 is pivoted back and forth.

In fig. 7, the different positions of the lever 62 according to the embodiment of fig. 4 can be clearly seen, which is performed during the reciprocating movement, since the driver 54 of the lever 62 moves along the curve 56, which has portions with different distances with respect to the axis a.

Fig. 4 shows the pivoted-back position of the extractor 20 and the completely open recess 38.

In all embodiments, the pushing-out device also acts on the recess 38 as it moves along the scraper 32, so that the cross section of the recess 38 remains unchanged even after leaving the open side 28 until it is transferred to the tamping tool 12. This is true regardless of which embodiment is shown.

As an alternative to the illustrated embodiment, some or all of the excess bristles may be pushed out of the recess when pivoting back and/or at a rearward dead center (i.e., in a rearward position). It is important here, however, that this bristle pushing-out takes place in each cycle (i.e. during operation).

Claims

1. A bristle separator for a brush-setting tool, comprising a strand extractor (20) which can be pivoted back and forth about an axis (A) between a transfer position and a pivoted-back position on a setting tool (12) and which is simultaneously moved along a bristle magazine (24) with an outer side (30) and a recess (38) present in the outer side (30) and accommodates a strand in the recess (38) out of the bristle magazine (24), wherein an ejection device (40) is present, which is designed to: during the separation, the pushing-out device reduces the cross section of the recess (38) over the path of the movement of the recess (38) along the open side (28) of the bristle magazine (24) and pushes the bristles (26) from the recess (38) back into the bristle magazine (24).

2. The beam splitter according to claim 1, wherein the push-out device (40) is configured to: the ejection device (40) always reduces the cross section of the recess (38) during forward pivoting.

3. A beam splitter as claimed in claim 1 or claim 2, in which the cross-section decreases continuously during pivoting.

4. A beam splitter according to any preceding claim, characterised in that the push-out device (40) has a movable part fixed to the extractor (20) which is partially movable onto the recess (38).

5. A beam splitter according to claim 4, characterised in that the movable part is moved by an actuator remote from the extractor (20).

6. The beam splitter according to claim 5, characterized in that the drive comprises a stationary or driven curve (56) along which a driver (54) coupled with the movable part moves, wherein the curve (56) is configured such that the movable part partially closes a notch (38) on the beam extractor (20) during forward pivoting.

7. A beam splitter according to any of claims 4 to 6, in which the movable part is a pivoting lever (62) or a push lever (50).

8. The hair beam splitter according to one of claims 1 to 3, characterized in that the ejection device (40) is a stationary deflector (42) which, in the region of the open side (28) of the bristle magazine (24), in a top view of the extractor (20), increasingly overlaps the recess (38) when pivoted forward.

9. A beam splitter according to claim 8, characterised in that the deflector (42) has a convexly curved deflector face (44) against which the bristles (26) in the recess (38) move when pivoted and which extends obliquely into the trajectory of movement of the bristles (26) in the recess (38).

10. The beam splitter according to one of the preceding claims, characterized in that the push-out device (40) is configured to: during the pivoting back, the recess (38) is gradually open, preferably initially at least partially open and in the pivoted-back position completely open.

11. Method for splitting tufts for a brush tamping tool, in particular using a beam splitter (20) according to one of the preceding claims, characterized by the following steps:

providing a tuft extractor (20) which can be pivoted back and forth about an axis (A) between a transfer position and a pivoted-back position on the filling tool (12) and which is moved along the bristle magazine (24) with an outer side (30) and a recess (38) present in the outer side (30),

during pivoting back, filling the recess (38) with bristles (26) from the bristle magazine (24), and

the bristles (26) are pushed back from the recess (38) into the bristle magazine (24) during the separating operation.

12. Method according to claim 11, characterized in that the notch (38) is fully open during pivoting back.

13. Method according to claim 11 or 12, characterized in that the cross-section of the recess (38) is reduced by at least 10%, preferably by at least 15%, during the separating operation.

14. Method according to one of claims 11 to 13, characterized in that the cross section of the recess (38) remains constant after leaving the open side (28) during forward pivoting.

15. The method according to one of claims 11 to 14, characterized in that the bristles are pushed back into the bristle magazine during forward pivoting of the extractor (20).