EP1260441B1 - Manual tying device for tying packets by means of steel band - Google Patents

Abstract

The strapping device has a base plate with bearing face for mounting on packed goods and has a closing device and tensioner. The tensioner has a hand-operated lever for operating a tension wheel and an axial coupling (44) is provided in a force flow running from the tension lever (39) to the tension wheel (38). The axial coupling can have two coupling parts (44a, 44b) which can be brought in and out of engagement and which each have several geometrically predetermined segments.

Description

The invention relates to a hand-operated, preferably exclusively hand-operated and mobile, strapping device according to the preamble of claim 1.

Such strapping devices are often for the mobile Insert provided to allow a user anywhere Packaged goods can be strapped with a steel band. A genus This strapping equipment typically has a Closing device, which by multiple notching, without the use of an additional closure element, such as a seal, a connection produced by two layers of steel strip. For this genus strapping equipment is also typical that both the Tape tensioning as well as shuttering manually without Utilization of external energy, in particular electrical or hydraulic energy is generated. The operator a generic strapping device has this only his own muscle power available. The However, invention is also suitable for a different genus of strapping tools in which either a closure element, like the already mentioned seal, or Power supply, such as electrical energy to Generation of a welded connection in plastic tapes, is used. The genera of strapping tools However, in common is that a tensioning wheel with a hand-operated Tension lever is driven.

In order to apply a tension on the belt loop, must the tensioning wheel is rotated by means of the tensioning lever become. By a frictional engagement between the tensioning wheel and the band position in contact with him, can the tape ply toward a supply roll of tape be moved, making the belt loop smaller and the Belt tension therefore gets bigger. Usually, in a direction of rotation of the clamping lever only over a limited Angle range, for example, 120 °, to be moved. However, the associated rotation of the tensioning wheel is sufficient not enough to achieve a sufficient belt tension. For this reason, it is necessary to use the clamping lever several times by pressing this in an oscillating Movement between two rotation end positions and is moved here. So this is not the tension wheel again moved back against the clamping direction of the tape is the clamping lever via a coupling with the Tensioning wheel connected.

In previously known strapping of the aforementioned Art is the clutch here as a ratchet with a sprung Pawl formed radially in correspondingly shaped Gaps of a wheel engages. Such a coupling a tensioning drive is for example in the under the name CM 14 sold device of the same applicant realized.

However, this previously known solution can not satisfy that in particular the pawl due to the acting high forces and torques relatively massive must be designed and this clutch thus a lot of space needed and brings a high weight.

From GB 707 418 A is a hand-operated Strapping device previously known, in the power flow between clamping lever to tensioning wheel an axial coupling is provided. The axial coupling has two disc-shaped coupling parts, one of which a Has a variety of compression spring loaded fingers. The Fingers are displaceable relative to their coupling part and can thereby engage recesses of the be brought to other coupling part. The two Clutch parts have a fixed axial Distance from each other.

The invention is therefore based on the object, a Coupling for an operative connection between the clamping lever and to propose the tensioning wheel, the structurally cheaper is designed.

This object is in a strapping of the beginning mentioned type according to the invention by the subject of Claim 1 solved. Under axial couplings - Or axial surface couplings - in the sense of the present Invention, such couplings can be understood in which a coupling part has an axial surface in the area the tensioning shaft, i. a surface or a plane the surface through which the tensioning axis passes is part of it has and this axial surface or plane in operative connection with another coupling part to be coupled can be brought. In a structurally simple and preferred Embodiment, the axial surface an end face the tensioning shaft itself. An axial surface can but also surrounded the clamping shaft. A second, the tension lever assigned axial surface can then with the first in and come out of operative connection to a power flow between the clamping lever and the tensioning wheel to close or cancel.

It has proven to be beneficial if at the two Axial surfaces each have multiple segments are present, the can be brought into and out of engagement. It is for Training such a coupling only a particularly low constructive effort required when the segments even with respect to their respective coupling part are not mobile. Preferably, for the production a non-rotatable connection, or for their resolution, at least one of the coupling parts moves. The corresponding Segments follow in this embodiment due their rigid connection with the coupling part of its movement.

Such segments may each have a flank surface, in abutment against a flank surface of a segment the other coupling part are brought. The resultant positive connection will then lead to a movement of the clamping lever in a predetermined Direction of rotation to a rotary movement of the tensioning wheel. The flank surfaces should preferably be parallel and radial to Be aligned clamping axis. Since several at the same time Flank surfaces are engaged with each other, it is possible to transmit high torque in a small space. The size of the transmittable torque can by an increase in the sum of the total area of the flank surfaces specifically increased or decreased.

So in a direction of rotation associated with the positive connection opposite sense of rotation of the clamping lever of the clamping shaft decoupled, it may be appropriate to the segments so that they can slide on each other. To achieve this, can be a constructive solution consist of the segments with respect to the axial surface to provide with ramp-like rising surfaces.

In a further preferred embodiment of the invention can the segments of both axial surfaces as Hirth toothing be educated. The geometrically simple Hirth toothing has all of the above Benefits and can be relatively easy to manufacture.

Further preferred embodiments of the invention result arising from the dependent claims, the description and the drawing.

Fig. 1

eine perspektivische Darstellung eines erfindungsgemässen Umreifungsgerätes;

Fig.2

das Umreifungsgerät von Fig.1 in einer anderen perspektivischen Darstellung;

Fig. 3a

eine Längsschnittdarstellung des Umreifungsgerätes von Fig. 1, bei dem sich der Verschliesserhebel in einer Offenendlage befindet;

Fig. 3b - 3d

eine Darstellung des Umreifungsgerätes gemäss Fig. 3a, in denen der Verschliesserhebel in zwei Zwischenlagen sowie in der Verschliessendlage gezeigt ist;

Fig. 4

eine Darstellung eines Querschnittes, der sowohl durch eine Drehachse als auch eine Spannachse des Umreifungsgerätes verläuft;

Fig. 5

eine weitere perspektivische Darstellung des Umreifungsgerätes, bei dem gegenüber der Darstellung der Fig. 1 und 2 ein Gehäuse und ein Spannhebel entfernt ist;

Fig. 6

eine Schnittdarstellung entlang einer Spannachse;

Fig. 7

eine perspektivische Darstellung eines mit einem Kupplungsteil einer Axialkupplung versehenen Spannhebels;

Fig. 8a

ein Ausschnitt eines Längsschnitts durch im Eingriff befindlicher Segmente einer Hirthverzahnung;

Fig. 8b

eine Darstellung gemäss Fig. 8a nach einer Relativbewegung von zwei Kupplungsteilen, an denen die Segmente angeordnet sind;

Fig. 9

eine Darstellung des Umreifungsgerätes gemäss Fig. 3a mit einer in das Umreifungsgerät eingelegten Bandschlaufe.

Fig. 10

ein weiteres Ausführungsbeispiel in einer Darstellung gemäss Fig. 3a;

Fig. 11, 12

zwei Darstellungen des Umreifungsgerätes aus Fig. 10, in denen der Verschliesserhebel in einer Zwischenlage sowie in der Verschliessendlage gezeigt ist;

Fig. 13

eine Schnittdarstellung des Ausführungsbeispiels aus Fig. 10 gemäss der Darstellung von Fig. 4.

The invention will be explained in more detail with reference to an exemplary embodiments shown schematically in the figures; show it:

Fig. 1

a perspective view of a strapping device according to the invention;

Fig.2

the strapping apparatus of Figure 1 in another perspective view;

Fig. 3a

a longitudinal sectional view of the strapping apparatus of Figure 1, in which the Verschliesserhebel is in an open position.

Fig. 3b - 3d

a representation of the strapping apparatus according to Fig. 3a, in which the Verschliesserhebel is shown in two intermediate layers and in the Verschliessendlage;

Fig. 4

a representation of a cross section which extends through both an axis of rotation and a clamping axis of the strapping apparatus;

Fig. 5

a further perspective view of the strapping apparatus, in which with respect to the illustration of Figures 1 and 2, a housing and a clamping lever is removed ..;

Fig. 6

a sectional view along a clamping axis;

Fig. 7

a perspective view of a provided with a coupling part of an axial coupling clamping lever;

Fig. 8a

a section of a longitudinal section through engaged segments of a Hirth toothing;

Fig. 8b

a view according to FIG. 8a after a relative movement of two coupling parts on which the segments are arranged;

Fig. 9

a representation of the strapping apparatus according to Fig. 3a with an inserted into the strapping band loop.

Fig. 10

a further embodiment in a representation according to Fig. 3a;

Fig. 11, 12th

two illustrations of the strapping apparatus of Figure 10, in which the Verschliesserhebel is shown in an intermediate position and in the Verschliessendlage.

Fig. 13

a sectional view of the embodiment of FIG. 10 according to the illustration of FIG. 4th

The shown in Figures 1 and 2, exclusively hand-operated Strapping device has a base plate 1 as well one in the region of a front end 1a of the base plate 1 at a bearing 2 pivotally mounted Matrizenträger 3 on. The Matrizenträger is shown in Figs. 1 and 2 covered by a housing 4, but in Figs. 3a - 3d better to recognize. Is next to the Matrizenträger one integral with the base plate 1 stationary Carrier 5 is arranged, in particular for receiving used by bearings. The carrier is in particular in Fig. 5 can be seen.

As can be seen in particular from FIGS. 3a to 3d can, is in the base plate 1, a stamp 6 from above in a recess of the base plate 1 is inserted. The Stamp 6 is by means of at least one of a bearing surface 1b the base plate 1 ago introduced screw 7 and pin pins 8 attached to the base plate 1 and an ingredient a closure device. Toward the rear end of the base plate is just behind the Stamp a contact surface 1 d of the base plate 1 is provided. In the region of the rear end 1c of the base plate. 1 is finally in the base plate one on top profiled tooth plate 9 (Fig. 9) used against a holding plate 10 is present. The holding plate 10 is screwed to the base plate 1 and thus fixes the Tooth plate 9.

The die carrier 3 is by means of a radial roller bearing trained rotary bearing 12 at the front end of the Carrier 5 of the strapping device stored. A rotation axis the rotary bearing 12 extends substantially transversely to an orientation of the arranged in the strapping device Bandes and thus perpendicular to the plane of Fig. 3a-3d. As another component of the closing device the die carrier 3 has a two-part die 13 from, in the illustration of Fig. 1, only the front Matrizenteil 13a is visible. The die 13 is on one of the base plate 1 facing bottom 3a of the Matrizenträgers inserted into a recess. For fixing the die 13 is this on a pin 17 of the Matrizenträgers 3 postponed and by means of two screws 15, 16 (Fig. 3a) screwed to the die carrier 3. The Die 13 and the punch 6 can be substantially corresponding in DE 38 41 489 C2 or the_CH 659 221 A5 are shown formed closing tools. In Direction to the rear end of the strapping device is also at the bottom of the Matrizenträgers in this a notching tool designed as a notching tool 18 is used. A notching edge 18a of the release agent is available a predetermined length over the bottom 3a via. The notching tool 18 belongs to a parting means of the strapping device, with a section of a steel band can be separated by a shearing process.

On one of the base plate 1 side facing away from the Matrizenträger 3 on an upper side a receptacle 19 for a transmission element 20. The recording 19 is this formed approximately bifurcated, the two Fork struts 19a, 19b are bent to each other. The closer to the rear end 1b of the base plate fork stay 19b is provided with an inner rolling surface 19c which is shaped so that the transmission element 20 in a pivoting movement of the die carrier 3 via a certain route can shift on her. The shape of the others Fork brace 19a is designed such that the Transmission element 20 during pivoting movement on the one hand move in the predetermined manner in the receptacle 19 but on the other hand certainly between the two Fork struts 19a, 19b is held.

In the illustrated embodiment, the transmission element 20 a with its eccentric axis 23 in relation on a rotation axis 24 of a later explained in more detail Swivel bearing 22 (see also Fig. 4) arranged eccentrically Role. The eccentricity is denoted by E in FIG. 3b. To reduce the wear this is Roll provided with an outer slide ring, with which the Transmission element 20 with the fork struts 19a, 19b of the Matrizenträgers 3 comes into contact. As in particular from Fig. 2 it can be seen, the pivot bearing 22 is supported via a bearing fork 25 on the carrier 5 from. The pivot bearing can be operated via a Verschliesserhebel 26, the rotatably connected to a shaft 27 of the pivot bearing is. At the fixed bearing fork connected to the carrier 3 25 is also an abutment 28 connected against this is a rocker described in more detail below 30 supported by a spring 29.

As particularly taken from the sectional view of FIG. 4 can be, is the Verschliesserhebel 26 with a ring member 26 a rotatably mounted on the rotary shaft 27. On both sides of the shutter lever are also annular ends 25a, 25b of the bearing fork 25 are provided. In the ends 25 a, 25 b of the bearing fork 25 is for Storage of the rotary shaft 27 each have a needle bearing 33a, 33b intended.

In each case one of two fork-shaped legs 30a, 30b the rocker 30 is on the one hand between the Verschliesserhebel 26 and a first of the ends 25a of the storage fork and on the other hand, adjacent to the second end 25b of the storage fork arranged on the right outer side on the rotary shaft 27. The rocker 30 is also in Fig. 2 to recognize and will be explained in more detail below. Also the legs 30a, 30b of the rocker are by needle bearings 34a, 34b mounted on the rotary shaft 27. In the presentation of Fig. 4 is finally on the other End of the rotary shaft 27 arranged transmission element 20th to recognize. The transmission element 20 is by means of a Slide bearing 35 rotatably supported with respect to the rotary shaft 27.

As already discussed, one is at the transfer element 20 opposite end of the rotary shaft 27th on the latter, the rocker 30 of the clamping device rotatable stored. Since the rocker 30 is arranged on the same shaft is like the Verschliesserhebel 26 while the aligned Fulcrum 24, with which the Verschliesserhebel 26, the Rotary shaft 27 is set in rotary motion, with a pivot axis 36 of the rocker 30. However, after the rocker 30 with Radial bearings arranged on the shaft are rotational movements the shaft 27 of pivotal movement of the rocker 30 from each other decoupled. Both the axis of rotation 24 and the Pivot axis 36 are substantially parallel to Axis of the rotary bearing 12.

According to FIG. 5, the rocker 30 additionally has a handle 37 firmly connected, with which the rocker in the form of a Actuate pivoting movement about the pivot axis 24, 36 leaves. On the handle 37, the compression spring 29 acts, which is supported on the abutment 28. The rocker 30 can Thus, from a clamping position shown in the figures, in a tensioning wheel 38 (Fig. 3a) against the toothed plate 9 and a guided over the tooth plate band, is in one not shown in the figures neutral end position and again be pivoted back into the clamping position. In the Neutral end position is the tensioning wheel with distance to the tooth plate arranged. Without affecting the seesaw, takes These always due to the spring force acting on them Cocking position.

At one of the pivot bearing 22 (Fig. 2) opposite End of the rocker 30, a clamping lever 39 is attached, with which the tensioning wheel 38 (FIG. 3a) is set in rotary motion can be. As can be seen in particular from FIGS. 1 and 4) is in a cylinder part 40 of the rocker 30th a clamping shaft 43 rotatably mounted. At the two ends the tensioning shaft 43 is on the one hand the tensioning lever 39 and on the other hand, the non-rotatably mounted on the clamping shaft Tensioning wheel 38. As shown in Figs. 4 and 6 can be seen is the clamping shaft in the rocker 30 with a on a radial needle bearing based sprag freewheel rotatably mounted. For the present embodiment For example, the one from the company INA Wälzlager Schaeffler oHG, Herzogenaurach (Germany), offered Case freewheel with bearing HFL 1626, shown, etc. in the catalog 306/1991, proved suitable. Such freewheels allow only one rotation in one direction of rotation. They block against rotations in the other direction of rotation the wave they carry.

In the area of the clamping lever 39 is located on the Clamping shaft - and thus in the power flow between the clamping lever and the tensioning wheel - an axial coupling 44 (FIG. 4) and Fig. 6). With the help of the axial coupling 44 of the means a non-illustrated radial bearing rotatable Tensioning lever 39 with the tensioning shaft 43 in and out of engagement to be brought.

The axial coupling 44 has two coupling parts 44a, 44b , both of which have a serration 45 (FIGS. 5 and 5) Fig. 7) are provided. As shown in particular in FIG. 6 is one of the two coupling parts 44a, 44b is a lever-side bushing on which the lever is attached and on the other hand, provided with a straight internal toothing Takeaway. The driver 44b is on a peripheral side Straight outer toothing 46 of the tensioning shaft 43 is arranged and connected with this form-fitting. The driver 44b is supported by a compression spring 47 a bearing ring 48 from, in turn, against a shoulder 43a of the clamping shaft 43 is applied. Is on the driver 44b in the direction of a plane parallel to the axis of rotation 24 Spannachse 49 exerted a correspondingly large pressure force, Thus, the driver 44b against the spring force in Direction of the tensioning wheel 38 on the tensioning shaft 43 axially moved and subsequently by the cocked spring again be pushed back to its original position.

As sketched in FIGS. 8a and 8b, the serration has 45 on circular, to the clamping axis in essential orthogonally oriented surfaces of each Coupling part 44a, 44b more, each geometrically the same Segments 45a, 45b, in the direction of the clamping axis 49th with a ramp-like area 50 increase by the amount a and then with a steep, essentially parallel to the clamping axis extending flank surface 51 to the foot of the respective adjacent segment fall off. The flank surfaces 51 are at least with respect to the clamping axis 49 essentially aligned radially. Regarding of Longitudinal sections that run parallel to the clamping axis, the segments are thus substantially triangular educated.

Due to the described arrangement of the segments 45a, 45b of the two coupling parts 44a, 44b, the ramp-like Surfaces 50 of segments 45a, 45b different Coupling parts only in a relative direction of rotation glide flat on each other, as indicated in Fig. 8b is. At the end of this sliding movement then always passes the flank surface 51a of a segment 45a behind the flank surface 51b of a segment 45b of the other coupling part 44b. Since both the clamping lever 39 and the Tensioning shaft 43 not their position in the axial direction change is needed to perform this movement, that the driver 44b in the already described Way is pressed against the spring 47 and this one axial displacement executes whose length of the height or Length of the flank surfaces 51 corresponds. In this movement can thus the clamping lever 39 to the stationary and the freewheel 41 blocked clamping shaft 43 are rotated. The tensioning lever 39 is thus decoupled from the tensioning shaft. If, however, the clamping lever 39 in reverse Operated direction of rotation, press flank surfaces 51a of the clamping lever against flank surfaces 51b of the driver 44b. Of the Tension lever is coupled to the tension shaft, whereby the Rotary movement of the clamping lever, a rotation of the tensioning wheel 38 causes.

To with the illustrated inventive strapping a belt loop around a only in Figure 9 schematically To clamp shown packaged 58, the first Tape be placed loosely around the packaged goods 58, leaving in the area the free end of the tape 59 two tape layers 60, 61 on top of each other lie. Then the strapping machine with his Bearing surface 1b of the base plate 1 arranged on the packaged goods, the die carrier 3 in its open-end position and the tensioning wheel 38 is arranged in its neutral end position are. This allows the two superimposed Band layers 60, 61 over the base plate 1 of the strapping device be guided, so that the band between the die 13 and the punch 6 is located. By a pivoting movement of the rocker 30 against the spring force the compression spring 29 can then also between the tensioning wheel 38th and the tooth plate 9 a gap can be created. For this For example, an operator may manipulate handle 37 and its open-end position arranged Verschliesserhebel 26 with one hand engage around the handle 37 in the direction of Verschliesserhebels Press 26 upwards. After the two band layers 60, 61 are inserted into the gap, the handle becomes released, whereby the compression spring 29, the rocker 30 again in the direction of the tooth plate 9 in its clamping position moved back. The two band layers 60, 61 are thereby clamped between the tensioning wheel 38 and the tooth plate 9. Here, the lower band layer 60 is with the free end of the tape 59 on the punch 6 and the contact surface 1d of the base plate. The one not shown Supply roll leading other band layer 61 is located over the free end of the tape and protrudes behind the tensioning wheel out of the strapping tool. This situation is in the Fig. 9 is shown.

Now, the belt loop by pressing the clamping lever 39 be tense. The clamping lever 39 is this several times between his two end positions swung back and forth. In its pivotal movement in the counterclockwise direction (with respect to the illustrations of FIGS. 3a-3d) there is a positive connection between the two coupling parts 44a, 44b. The tensioning wheel is thus in a counterclockwise direction offset rotational movement. By a frictional engagement between the upper band layer 61 and the Tensioning wheel 38, the upper band layer continues from the strapping pulled out and the strap loop with a Provided tension. The lower band layer 60, however, will by the profiling of the tooth plate 9 unchanged in Position held. During the pivoting movement of the clamping lever clockwise, however, is the positive connection between the coupling parts 44a, 44b and thus also between the tensioning lever 39 and the tensioning shaft 43 repealed. The tensioning wheel 38 is thus in this direction of movement not taken. The tensioning wheel 38 and the tensioning shaft 43 rotate during decoupling from the clamping lever 39 because of the freewheel 41 also not back, but remain in their current rotational position. The oscillating Movement of the clamping lever is repeated as long as applied to the tape sufficient tension is.

Subsequently, a closure of the belt loop takes place. For this purpose, the Verschliesserhebel 26 and the transmission element 20 from its open end position (FIG. 3a) in FIG its Verschliessendlage transferred (Fig. 3d). In the illustrated Embodiment sets the Verschliesserhebel in this case, a rotation angle α of about 140 ° back. The eccentric mounted roller rolls on the surface 19c of the leg 19b of the receptacle 19 from. The eccentricity E of the roller rotates in the same direction like the capping lever. At the end of the rotary motion the role lies in the area of the free end of the thigh 19b against the surface 19c. The leg 19b is included aligned with the angular position of the eccentricity, that if possible already from the first contact the Matrix with the upper band layer of the in the drawings with H designated lever arm of the on the die carrier applied torque is as large as possible. The lever arm arises as the distance of the rotary bearing 12 of the Direction of the force normal K, with the role of each momentarily against the leg 19b presses. In the illustrated embodiment takes the size of the lever arm H against End of the pivoting movement in relation to the line of sight of Fig. 3a to 3d rotating clockwise Matrizenträgers even still easy to.

In the Fig. 3a to 3d, which the two end positions and an intermediate position of Verschliesserhebels 26 and Transmission element 20 show is also shown that the force normal with respect to one through the axis of rotation 24 extending normal N of the bearing surface 1b or the contact surface 1d parallel thereto a negative one Angle β includes. Starting from the open end position until the closure end position this negative angle β steadily bigger. Under a "negative angle" is in To understand in this context an angle, the - starting from the normal N - to measure in the counterclockwise direction is. In FIGS. 3a-3d, it is also particularly easy to see in that the normal passing through the axis of rotation 24 N the support surface in the clamping direction (arrow 62) behind the point is at which the notching tool 18 against the base plate 1 and the band 61 presses.

Due to the comparatively long lever arm H can already the band from the beginning of the contact of the upper band layer with the front in the clamping direction 62 end of the die 13 are deformed. Since the lever arm H design-related even lighter at the end of the pivoting movement The torque increases if and only if the closing device also on a larger band surface must act. This reliably ensures that of the die and the stamp in the ribbon itself an additive-free, i. in particular seal and seal free, closure, trained becomes, which does not dissolve even at high belt tension. Immediately before reaching the closing position notches the notched cutting edge in the top, still with a tape supply connected, tape position and separates it from the tape supply from. Subsequently, the Verschliesserhebel again transferred to its open position, the tensioning wheel by pressing the rocker be lifted off the belt and the strapping device by laterally leading away from the now completed Belt loop to be removed.

In Figs. 10 - 13 is another embodiment of a strapping device according to the invention. There this great similarity to the embodiment described above has, is only following the differences received.

In Fig. 10 it is shown that, in contrast to the first Embodiment here in one in the die carrier 103 introduced half-shell 104 below the axis of rotation 124 a roller 105 is inserted. The half shell 104 has roughly the shape of a cut along a longitudinal axis Hollow cylinder, wherein the longitudinal axis of the half-shell 104 runs approximately parallel to the axis of rotation 124. On the Matrizenträger 103 is also directly in front of the Half shell 104, a retaining strip 108 is screwed. These has a circular cross-sectional area 108a on, which adjoins the half shell 104 and thus Also, a part of the cylindrical peripheral surface 105 a of Roll 105 surrounds. The roller 105 is thus freely rotatable in the half shell 104 provided with a sliding coating 104a arranged, wherein falling out of the roller 105 from the Half shell 104 is prevented by the retaining strip 108.

A section located immediately above the roller 105 the rotation shaft 127 is as a with respect to the rotation axis 124 eccentrically arranged cam 109 is formed. The cam integrally connected to the rotary shaft 109 thus takes over in this embodiment Function of a transmission element 120. With a Eccentric surface 109a of the cam is the rotation shaft 127 with the peripheral surface 105a of the roller 105 in contact and transmits Thus, a rotational movement of the rotary shaft 127 on the Die carrier 103. By the entlag the circumference of the eccentric cam 109 different distance the Eccentric surface 109a to the rotation axis 124 and the rotational movement the rotary shaft 127, the die carrier 103 at a pivoting movement (counterclockwise with respect to the illustration of FIG. 10) of the Verschliesserhebels 126th the die carrier 103 from the cam 109 from its open end position be pressed into its Verschliessendlage. Out the sectional view of Fig. 13 (the representation of Fig. 4) of the second embodiment is easy compared to the first embodiment changed structure of the device in the area of the transmission element 120 also visible. Also from this Representation goes the one-piece connected to the rotary shaft Cam 109 protruding on the in the die carrier mounted roller 105 acts.

If the Verschliesserhebel 126 from its Verschliessendlage moved back in the opposite direction, so engages a hook shown in FIGS. 11 and 12 110 positively under a not visible in the figures Projection of Matrizenträgers 103 and takes the Matrizenträger 103 with. The lead is in the illustrations of Fig. 12 and 13 behind the half-shell 104. In the further course of the rotation of the Rotary shaft 127 is the Matrizenträger then due to his As a result, rotational movement about the bearing 112 of the base plate 101 lifted and the hook 110 in his Open-ended position transferred. During the next strapping process the hook 110 is due to his then counterclockwise (Referring to Figs. 10 - 13) rotational movement free the die carrier again, so this one transferred by the cam in its Verschliessendlage can be.

From Fig. 11, which shows the Matrizenträger 103 shortly before reaching its Verschliessendlage, finally shows that at this time, the contact area between the cam 109 and the roller 105 is located approximately directly above the notching tool 118. In the closure end position itself, which is shown in FIG. 12, the contact region has then traveled behind the notching tool 118. In another embodiment not shown in the closed end of the _K could, however, be arranged also in ontaktbereich approximately above the cutting tool. Also in connection with these embodiments, the above-mentioned locations for the contact area in each case on the course of the strapping by the strapping and in a direction from the bearing 112 to the rear end of the strapping device (arrow 162).

As in the first embodiment should preferably also a direction of the transmission element At least 120 transmitted to the Matrizenträger force Aligned approximately perpendicular to the tape be. Furthermore, one in the Verschliessendlage by the axis of rotation 124 and the contact point between the Cam 109 and the role of running force-normal - the resulting from the transmitted force - preferably in run through the release agent or in relation to the direction 162 behind the release agent the base plate of the device.

Claims (7)

1. A manual tying device for tying a package with a tying band, which
   has a base plate (1) provided with a bearing surface for arrangement on a package,
   which furthermore has a closure device with which two layers of band can be permanently joined together,
   which is provided with a tensioning device with which a band tension can be applied to the tying band, wherein the tensioning device has a manually operated tensioning lever (39) with which a tensioning wheel (38) arranged on a tensioning shaft (43) can be actuated,
   which is further provided with a separating means with which the band can be separated,
   wherein an axial coupling (44) is provided in the force flux running from the tensioning lever (39) to the tensioning wheel (38), said axial coupling has two coupling members (44a, 44b) which can be brought in and out of engagement, each being provided with a plurality of geometrically pre-determined segments (45a, 45b),
   characterised in that
   the segments (45a, 45b) are respectively connected rotationally fixedly and non-displaceably to their coupling members (44a, 44b).
2. The tying device according to claim 1, characterised in that with the segments (45a, 45b) positive contact can be achieved in one direction of rotation and free-running in an opposite direction of rotation.
3. The tying device according to any one of the preceding claims 1 or 2, characterised in that in order to achieve positive contact, segments (45a, 45b) of both coupling members (44a, 44b) are provided with flank surfaces (51) which are aligned at least approximately parallel to the tensioning axis.
4. The tying device according to claim 3, characterised in that flank surfaces (51) of the two coupling members (44a, 44b) can respectively be brought to rest flat in pairs.
5. The tying device according to one or more of the preceding claims 2 to 4, characterised in that at least some of the segments (45a, 45b) are located on an at least substantially annular-shaped axial surface which is arranged around the tensioning shaft (43) or on the tensioning shaft itself, and the axial surface is connected rotationally fixedly to the tensioning shaft.
6. The tying device according to one or more of the preceding claims 2 to 5, characterised in that both coupling members (44a, 44b) have the same number of geometrically identical segments (45a, 45b).
7. The tying device according to one ore more of the preceding claims 2 to 6, characterized in that the segments (45a, 45b) are constructed as Hirth-type serrations.

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