Automatic strapping tool equipment optimized for various single-piece cable tie thicknesses

Abstract

The present invention relates to an automatic strapping tool device optimized for various thicknesses of single-piece cable ties. The automatic strapping tool device is used to automatically tighten a one-piece cable tie and use the cable tie to tie bundled items. The tool device includes: a tensioning mechanism, the tensioning mechanism having: a tensioning gear unit with a tensioning gear; and a tensioning roller unit with two tensioning rollers, a gap formed between the tensioning gear and the tensioning rollers, the gap being configured to retain the one-piece cable tie strip processed by the device, the tensioning gear of the tensioning gear unit including teeth configured to fit into the serrations of the one-piece cable tie strip. The tensioning roller unit includes: a lever, the two tensioning rollers being provided on the lever in a first end portion, the lever rotation point being provided in a middle portion of the lever; and an adjusting element, the adjusting element being configured to adjust the gap width, the adjusting element being in mechanical contact with a second end portion of the lever, the second end portion being provided opposite to the first end portion along the main extension direction of the lever.

Description

Technical Field

[0001] The present disclosure relates to an automatic strapping tool device (ATD) for strapping bundles of items using an integrated cable tie (OPT), wherein the OPT is automatically tensioned by the ATD. In particular, the automatic strapping tool device is configured to strap bundles of items using a cable tie (as a special case of OPT), wherein the cable tie is automatically tensioned by the ATD. The ATD includes a tensioning mechanism having: a tensioning gear unit having a tensioning gear; and a tensioning roller unit having two tensioning rollers, with a gap formed between the tensioning gear and the tensioning rollers. The gap is configured to retain a respective strip of OPT being processed by the ATD, and the tensioning gear of the tensioning gear unit includes teeth configured to fit within the teeth of the OPT strip. Background Art

[0002] In order to bundle items into bundles with an integrated cable tie (a broad concept of cable ties), many non-stationary automatic strapping tools are available. For example, US 9 701 428 B2 describes a device for tensioning a material, wherein the material is tightened by two gears interacting with the material and pulling the material into a housing before cutting off the loose end of the material. US6 981 528 B2 describes an anti-clogging tensioning gear mechanism for an automatic tightening tool head, which uses only one gear to interact with the tail of a cable tie for tying bundles. A similar mechanism for a portable cable tie tool is disclosed in US 2019 / 248 521 A1.

[0003] US 2020 / 391 891 A1 describes an automatic tightening tool having a slider, a guide rail, a first guide claw, a second guide claw, a frame, a tensioning wheel, a cutter, a step-by-step feed mechanism, and a material push rod. The first guide claw and the second guide claw are mounted on the frame by rotating a center pin. The cutter and the tensioning wheel are mounted in the frame. The guide rail is arranged near the frame. The slider is engaged with the guide rail. The tightening includes: loading the step-by-step feed mechanism with cable ties, delivering the cable ties at fixed intervals in each bundling cycle, guiding the cable ties from a predetermined position to a bundling position by a slider, curling the tightening body of the ties in the guide grooves in the first guide claw and the second guide claw so that the tail passes through the hole or window in the head of the cable ties, tightening the cable ties by rotating the tensioning wheel, and cutting the tightened cable ties with the cutter. In particular, a plurality of rollers are provided that interact with the tensioning wheel to tighten the ties.

[0004] DE 10 2013 222 924 A1 describes a portable tool for tying objects, in particular cable bundles, with a strip such as a cable tie. The portable tool comprises a tool body in which a loop control element and a tensioning device are arranged, and a drive for the tool body, the drive being designed as a dual drive, so that the loop control element and the tensioning device each have their own drive, which are independently controlled by a control device. A tensioning wheel and two support wheels form a gap through which the tensioning wheel pulls the cable tie strip to tighten the cable tie. The width of the gap is fixed because the support roller and the tensioning wheel are arranged in a fixed relative position to each other. This design was chosen to overcome the shortcomings of existing designs, in which the support roller pushes the tensioning wheel by spring force, initially to ensure the tensioning wheel's grip on the cable tie strip, effectively causing the gear to squeeze into the strip and resulting in fine dust (of the cable tie strip) being generated in the housing of the automatic strapping tool, ultimately leading to mechanical problems and malfunctions of the automatic strapping tool.

[0005] However, the high processing capacity achieved by the automatic strapping tool of DE 10 2013 222 924 A1 depends on a mechanism in which, when the cable tie is closed, the tensioning gear is stopped by the cable tie and cannot be pulled further using the pre-set tension or tensioning force. This mechanism requires a very precise gap width between the tensioning gear and the fixed tensioning roller to allow the gear to engage the shape of the strap. If the gap is too small, the strap will become blocked. If the gap is too large, the tensioning gear may slip on the serrations of the cable tie strip. Consequently, the automatic strapping tool of DE 10 2013 222 924 A1 can only be used with cable tie strips of very specific thicknesses, with the necessary tolerance typically being approximately 0.1 mm. Summary of the Invention

[0006] Therefore, it can be considered that the objective technical problem currently addressed by the present invention is to provide an improved automatic strapping tool apparatus that overcomes the limitations of the prior art, and in particular an automatic strapping tool apparatus that is capable of reliably tightening a one-piece cable tie with increased tolerances regarding its thickness.

[0007] This objective problem is solved by an automatic strapping tool apparatus defined in the following aspects. Advantageous embodiments are apparent from the following other aspects, the description and the accompanying drawings.

[0008] One aspect relates to an automatic strapping tool (ATD) for automatically tightening a one-piece cable tie to bundle items. Specifically, the ATD is configured to automatically tighten a cable tie to bundle items.

[0009] Generally speaking, OPT is a broad concept of a standard cable tie, which has a cable tie head with a window, and a cable tie strip or tail that slides through the window to form a loop that can be used to bundle cables or the like, wherein the one-piece fixing tie also includes a neck, which connects the foot to the head, wherein the foot includes some kind of fixing device that can be used to fix the OPT to an object (for example, in a hole in an object), such as a mushroom head. An OPT without a neck / foot is a standard cable tie. An OPT can be one or more given types, wherein OPTs belonging to different types differ in foot geometry and / or neck geometry and / or head geometry and / or strip portion geometry (in particular in strip portion length and / or strip portion thickness). Such an OPT may also be referred to as a fixing tie or a one-piece fixing tie.

[0010] The ATD includes a tensioning mechanism comprising a tensioning gear unit with a tensioning gear and a tensioning roller unit with two tensioning rollers. The tensioning gear unit can also be referred to as a tensioning gear unit with a tensioning gear, and the tensioning roller unit can also be referred to as a tensioning roller unit with two tensioning rollers. The tensioning (or tensioning) mechanism forms a gap between the tensioning gear and the tensioning rollers. This gap is configured to retain the strip portion (also referred to as the tie portion) of the corresponding OPT (i.e., the OPT used to bundle the bundled items as intended) being processed by the ATD. The tensioning gear of the tensioning gear unit includes teeth configured to fit within the serrations of the OPT strip portion, preferably in a form-fit arrangement. Thus, the automatic strapping tool device is configured to bundle bundles using a specific, given OPT with corresponding serrations on the strip. Because OPTs such as cable ties are highly standardized, various commercially available OPTs can meet this requirement. Furthermore, the automatic strapping tool device can be adapted to specifically match the OPT of a specific company, for example. Here, the thickness of the OPT strip corresponds to the width of the gap, because the tensioning roller and the tensioning gear need to be in mechanical contact with the strip to tension the OPT, that is, to pull the OPT strip and cut it. The width of the gap, and therefore the thickness of the OPT, is measured in a plane perpendicular to the axis of rotation of the tensioning gear and the tensioning roller.

[0011] The tension roller unit comprises a lever, wherein two tension rollers (tension pulleys) are arranged on the lever at a first end thereof, with the pivot point of the lever being located in the middle of the lever; and an adjustment element of the tension roller unit, which is configured to adjust the width of the gap and is in mechanical contact with the second end of the lever. The second end of the lever is arranged opposite the first end along the main extension direction of the lever. Thus, the first end and the second end each comprise a respective first end / second end of the lever, which are diametrically opposed ends along the main extension direction of the lever.

[0012] This offers the advantage that the width of the gap can be adjusted with very high precision, since the relationship of the levers can be easily adjusted to achieve any desired tolerance for the adjustment gap width. Since the pivot point is located in the middle, the levers can also be adjusted very easily during the design of the ATD, without having to significantly alter the shape of the levers, and therefore without having to significantly alter the overall structure of the remaining strapping tool equipment, where space is limited. This arrangement also allows for precise automatic width adjustment, as will be described in more detail below. Thus, by virtue of the precisely adjustable gap between the tensioning gear and the tensioning roller, a shape-fitting arrangement of the OPT strip between the tensioning gear and the tensioning roller, in particular a squeeze-free arrangement, can be achieved even for different types of OPT (i.e., OPT with strip sections of varying thicknesses). Consequently, an optimal grip of the tensioning gear on the strip can be achieved for OPT with various strip section thicknesses, without having to force the tensioning gear into the strip section. Since the proposed design allows the gap width to be adjusted during the intended use (either manually or automatically), this automatic strapping tool device can also be used to strap items using a range of different OPTs with different thicknesses: that is, the gap can be adjusted individually for each single OPT processed by the ATD, for example, a wire harness can be bundled together using OPTs with different strip thicknesses in different areas of the harness without the need to use different ATDs.

[0013] As an alternative to the arrangement on the lever, the tensioning roller unit may comprise two tensioning rollers having respective individual adjustment elements which are configured to adjust the respective distances of the two tensioning rollers from the tensioning gear and thereby adjust the gap width. The respective adjustment elements may be or include linear adjustment elements for linearly moving the respective tensioning rollers. Alternatively or in addition, the respective adjustment elements may be or include eccentric elements on which each tensioning roller is eccentrically mounted and on which the distance to the tensioning gear can be varied by rotating the eccentric element (i.e., an eccentric wheel). Thus, the distance of each tensioning roller from the tensioning gear can be adjusted (preferably independently of one another), thereby enabling precise and reliable dynamic adjustment of the gap for OPT strips of different thicknesses by a shape-fitting arrangement of the OPT strip between the tensioning gear and the tensioning roller, in particular a squeeze-free arrangement between the tensioning gear and the tensioning roller. Features which are independent of the lever and which are described below may be used to enhance the described lever-free alternative.

[0014] In an advantageous embodiment, the turning point is substantially aligned with the respective rotation axes of the two tensioning rollers. Thus, the turning point can be aligned with the rotation axes of the two tensioning rollers, i.e. lie on a single straight line with the rotation axes of the two tensioning rollers, or be aligned with a preset deviation from the rotation axes of the two tensioning rollers. In particular, the preset deviation can be 5°, 2° or 1°. In order to measure the deviation, a first straight line can be drawn in a plane perpendicular to the rotation axes, passing through the turning point and the rotation axis closer to the turning point, and a second straight line passing through the two rotation axes of the two tensioning rollers. The angle between the first straight line and the second straight line will be the deviation from the alignment. This alignment has proven to be particularly useful and leads to an improved pressing force of the tensioning rollers on the strip portion and the tensioning gear.

[0015] In another advantageous embodiment, the midpoint of the rotational axis of the tensioning gear and the straight line connecting the rotational axes of the two tensioning rollers are arranged at substantially the same distance from the pivot point in a plane perpendicular to the rotational axis. Therefore, the midpoint and the rotational axis of the tensioning gear are most preferably arranged on a circle centered at the pivot point. The distances from the pivot point do not need to be exactly the same to achieve the most advantageous improved grip. In particular, they can be offset from each other by a predetermined deviation of less than 10%, less than 5%, or less than 2% of the distance between the rotational axes of the two tensioning rollers. Thus, for example, in a specific arrangement, the rotational axes of the two tensioning rollers can be arranged on a straight line, and for a gap of a given width, the rotational axis of the tensioning gear can be positioned midway between the rotational axes of the two tensioning rollers, as orthogonally projected onto the straight line connecting the rotational axes of the two tensioning rollers. This particular arrangement further optimizes the force distribution on the cable tie.

[0016] In another advantageous embodiment, the first distance between the two tensioning rollers and the pivot point is smaller than the second distance between the pivot point and the mechanical contact point of the adjustment element with the second end. In particular, the second distance is at least twice the first distance, and preferably at least three times the first distance. This has the advantage of allowing for very fine adjustment of the gap through which the OPT strip is pulled.

[0017] In another advantageous embodiment, the tensioning mechanism is characterized by a first stop and / or a second stop which respectively predetermine a fixed first limit (lower limit) and / or a fixed second limit (upper limit) for the width of the gap. This offers the advantage of very precisely setting the boundary conditions for preventing slippage of the strip portion by setting a suitable upper limit and for preventing the gear from digging into the strip by setting a suitable lower limit, which is adapted to the specific OPT for which the ATD is configured for use in the specific application at hand.

[0018] In another advantageous embodiment, the tensioning mechanism includes a spring element that is in mechanical contact with the second end of the lever and is configured to exert a spring force on the second end to maintain the tensioning roller close to the tensioning gear. The spring element thus effectively pushes the tensioning roller toward the strip, wherein the negative effects of excessive force on the strip can be prevented, for example, by the aforementioned stopper or a corresponding adjustable spring element, as described in the next paragraph. However, the use of a spring element allows for automatic self-adjustment of the gap width to account for irregularities in the thickness of the corresponding OPT strip, further enhancing the performance of the ATD.

[0019] Preferably, the spring element is an adjustable spring element, the position of which relative to the second end of the lever is adjustable to adjust the relative position of the tensioning roller near the tensioning gear. Furthermore, by appropriately incorporating the aforementioned stopper element to change the position of the adjustable spring element, the spring force applied to the cable tie can be adjusted without the gap width falling below the lower limit of the gap width. Thus, the ATD can be configured to accommodate irregularities or variations in the thickness of the ATD strip as an independent parameter in a desired manner.

[0020] In a particularly advantageous embodiment, the adjustment element comprises an eccentric shaft in mechanical contact with the second end of the lever, wherein the adjustment element is configured to adjust the minimum and / or maximum distance of the tensioning roller from the tensioning gear roller by rotating the eccentric shaft, thereby adjusting the distance from the rotation axis of the eccentric shaft and the contact surface of the lever, which ultimately results in adjusting the distance from the tensioning roller to the tensioning gear and thus the width of the gap. This has the advantage that in particular the minimum distance (and therefore the lower limit of the gap width) can be precisely adjusted, which can be used to ensure a non-squeezing setting of the OPT with strips of different thicknesses.

[0021] In a further advantageous embodiment, the tensioning mechanism includes a motor for automatically adjusting the relative position of the tensioning roller relative to the tensioning gear by adjusting the position of the adjustable spring element and / or for automatically adjusting the minimum distance between the tensioning roller and the tensioning gear via rotation of the eccentric shaft in response to a control signal from the control unit. This has the advantage that the ATD can handle OPT strips of different thicknesses and only requires corresponding control signals to do so.

[0022] The features and combinations of features described above (including the general part of the description) and the features and combinations of features disclosed in the description of the figures or in the separate figures can be used not only alone or in the described combinations, but also together with other features or without some of the disclosed features without departing from the scope of the present disclosure. Therefore, embodiments that are not explicitly shown and described in the figures but can be produced by combining the individual features disclosed in the figures individually are also part of the present disclosure. Therefore, embodiments and combinations of features that do not include all features of the originally formulated independent claims will be regarded as disclosed. Furthermore, embodiments and combinations of features that differ from or extend beyond the feature combinations described by the dependency of the claims are regarded as disclosed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The following further describes an exemplary embodiment through schematic diagrams, wherein:

[0024] Figure 1 An exemplary embodiment of an automatic strapping tool device, or ATD, is shown;

[0025] Figure 2 Details of an exemplary tensioning mechanism of an ATD are shown; and

[0026] Figure 3 Shown in the second configuration Figure 2 An exemplary tensioning mechanism.

[0027] In the different figures, identical or functionally identical features are provided with the same reference symbols. DETAILED DESCRIPTION

[0028] Figure 1 An exemplary embodiment of an automatic strapping tool device 1 (ATD 1) is shown for strapping a cable tie with an integrated cable tie, namely OPT 14 ( Figure 2 ) to bundle the bundled items 2. The two claws 3a, 3b are configured to grasp the bundled items 2 and guide the integrated cable tie ( Figure 2 ). These claws can also be called clamping jaws. In this example, the ATD 1 is also connected to a control unit 5, which provides control signals to the ATD and the tensioning mechanism 10 in this example.

[0029] Figure 2An exemplary embodiment of a tensioning mechanism 10 is shown, which has a tensioning gear unit 11 including a tensioning gear 11a, and a tensioning roller unit 12 including two tensioning rollers 12a, 12b, with a gap 13 formed between the tensioning gear 11a and the tensioning rollers 12a, 12b. The gap 13 is configured to hold a strip 14a of an OPT 14 to be processed by the ATD 1. The tensioning gear 11a includes teeth 11b configured to fit within the serrations 14b of the OPT strip 14a.

[0030] The tensioning roller unit 12 includes: a lever 12c, two tensioning rollers 12a and 12b are arranged on the lever 12c in a first end 12' of the lever 12c, a rotation point 12d is arranged in the middle part 12" of the lever 12c; and an adjustment element 12e that is in mechanical contact with the second end 12'" of the lever 12c. The second end 12'" is arranged opposite to the first end 12' along the main extension direction of the lever 12c. The adjustment element 12e is configured to adjust the width w of the gap 13.

[0031] In the present example, this adjustment of the width w of the gap 13 is achieved by an eccentric shaft 12e* as part of an adjustment element 12e, which is in mechanical contact with the second end 12″′ of the lever 12c, wherein, in the present example, the minimum distance of the tensioning rollers 12a, 12b to the tensioning gear 11a can be adjusted by rotating the eccentric shaft 12e* about the rotation axis E of the eccentric shaft 12e*.

[0032] Furthermore, in this example, the pivot point 12d is aligned with the rotation axes R1, R2 of the two tensioning rollers 12a, 12b. A first distance d1 between the two tensioning rollers 12a, 12b and the pivot point 12d is smaller than a second distance d2 between the pivot point 12d and the mechanical contact point C between the adjustment element 12e and the second end portion 12''.

[0033] In the example shown, the tensioning mechanism further comprises a first stopper 15a and a second stopper 15b which respectively predetermine a fixed lower limit and a fixed upper limit for the width w of the gap 13. In addition, in the present example, the tensioning mechanism 10 comprises a spring element 16 which is in mechanical contact with the second end 12'' of the lever 12c and is configured to exert a spring force on the second end 12'' to keep the tensioning rollers 12a, 12b close to the tensioning gear 11a, in the present example, as close to the tensioning gear 11a as the adjustment element 12e allows.

[0034] Figure 3 Shown Figure 2 The tensioning mechanism 10, wherein the gap 13 is adjusted to Figure 2 The smaller width w in different. Note that Figure 2In contrast, the eccentric shaft 12e* of the adjusting element 12e rotates to rotate the lever 12c around the rotation point 12d, thereby making the tension rollers 12a and 12b Figure 2 As shown, the tensioning rollers 12a and 12b are positioned closer to the tensioning gear 11a. Specifically, this allows the spring element 16 to push the tensioning rollers 12a and 12b closer to the tensioning gear 11a. Note that in this example, the rotation point 12d is aligned with the rotation axes R1 and R2 of the two tensioning rollers 12a and 12b, as they are all on the same straight line 1. Furthermore, in the orthogonal projection of the rotation axis T of the tensioning gear 11a onto this line 1, the rotation axis T is projected onto the midpoint M on line 1, midway between the rotation axes R1 and R2 on line 1. Therefore, the midpoint M and the rotation axis T are approximately located on a circle having a given radius and centered at the rotation point 12d.

Claims

1. An automatic strapping tool device (1), the automatic strapping tool device (1) being used for strapping articles (2) into bundles by automatically tightening an integrated cable tie (14) by the automatic strapping tool device (1), the automatic strapping tool device (1) comprising: - a tensioning mechanism (10), comprising: a tensioning gear unit (11) having a tensioning gear (11a); and a tensioning roller unit (12) having two tensioning rollers (12a, 12b), a gap (13) being formed between the tensioning gear (11a) and the tensioning rollers (12a, 12b), wherein the gap (13) is configured to hold a strip (14a) of a corresponding one-piece cable tie (14) processed by the automatic strapping tool device (1), and the tensioning gear (11a) of the tensioning gear unit (11) includes teeth (11b) configured to fit into the serrations (14b) of the strip (14a) of the one-piece cable tie; Its characteristics are: The tension roller unit (12) further comprises: a lever (12c), the two tension rollers (12a, 12b) being arranged on the lever (12c) in a first end portion (12') of the lever (12c), the rotation point (12d) of the lever (12c) being arranged in a middle portion (12") of the lever (12c); and an adjusting element (12e) of the tension roller unit (12), the adjusting element being configured to adjust a width (w) of the gap (13), the adjusting element being mechanically coupled to a second end portion (12'') of the lever (12c). The invention relates to a cable tie (14) comprising a first end portion (12') and a second end portion (12'') arranged opposite to the first end portion (12') along the main extension direction of the lever (12c), and an adjusting element (12e) comprising an eccentric shaft (12e*) in mechanical contact with the second end portion (12'') of the lever (12c), wherein the adjusting element (12e) is configured to adjust the minimum distance between the tensioning rollers (12a, 12b) and the tensioning gear (11a) according to the thickness of the strip (14a) of the integrated cable tie (14) by rotating the eccentric shaft (12e*).

2. The automatic strapping tool device (1) according to claim 1, characterized in that: The rotation point (12d) is aligned with the rotation axes (R1, R2) of the two tensioning rollers (12a, 12b).

3. The automatic strapping tool device (1) according to claim 1 or 2, characterized in that: The rotation axis (T) of the tensioning gear (11a) and the midpoint (M) of the straight line (1) connecting the rotation axes (R1, R2) of the two tensioning rollers (12a, 12b) have the same distance from the rotation point (12d).

4. The automatic strapping tool device (1) according to claim 1 or 2, characterized in that: A first distance (d1) between the two tensioning rollers (12a, 12b) and the rotation point (12d) is smaller than a second distance (d2) between the rotation point (12d) and the mechanical contact point (C) of the adjustment element (12e) and the second end (12'').

5. The automatic strapping tool device (1) according to claim 4, characterized in that: The second distance (d2) is at least twice the first distance (d1).

6. The automatic strapping tool device (1) according to claim 1 or 2, characterized in that: The tensioning mechanism (10) includes a spring element (16) that is in mechanical contact with the second end (12'") of the lever (12c) and is configured to exert a spring force on the second end (12'") to keep the tensioning rollers (12a, 12b) close to the tensioning gear (11a).

7. The automatic strapping tool device (1) according to claim 6, characterized in that: The spring element (16) is an adjustable spring element, wherein the position of the adjustable spring element relative to the second end (12'") of the lever (12c) is adjustable to adjust the position of the tensioning rollers (12a, 12b) relative to the tensioning gear (11a).

8. The automatic strapping tool device (1) according to claim 5, characterized in that: The second distance (d2) is at least three times the first distance (d1).

9. The automatic strapping tool device (1) according to claim 1, characterized in that: The tensioning mechanism (10) comprises a first limiter (15a) and / or a second limiter (15b), wherein the first limiter (15a) and / or the second limiter (15b) respectively predetermine a fixed first limit, i.e., a lower limit, and / or a fixed second limit, i.e., an upper limit, for the width (w) of the gap (13).

10. The automatic strapping tool device (1) according to claim 3, characterized in that: A first distance (d1) between the two tensioning rollers (12a, 12b) and the rotation point (12d) is smaller than a second distance (d2) between the rotation point (12d) and the mechanical contact point (C) of the adjustment element (12e) and the second end (12'').

11. The automatic strapping tool device (1) according to claim 3, characterized in that: The tensioning mechanism (10) includes a spring element (16) that is in mechanical contact with the second end (12'") of the lever (12c) and is configured to exert a spring force on the second end (12'") to keep the tensioning rollers (12a, 12b) close to the tensioning gear (11a).

12. The automatic strapping tool device (1) according to claim 4, characterized in that: The tensioning mechanism (10) includes a spring element (16) that is in mechanical contact with the second end (12'") of the lever (12c) and is configured to exert a spring force on the second end (12'") to keep the tensioning rollers (12a, 12b) close to the tensioning gear (11a).

13. The automatic strapping tool device (1) according to claim 5, characterized in that: The tensioning mechanism (10) includes a spring element (16) that is in mechanical contact with the second end (12'") of the lever (12c) and is configured to exert a spring force on the second end (12'") to keep the tensioning rollers (12a, 12b) close to the tensioning gear (11a).

14. An automatic strapping tool device (1), the automatic strapping tool device (1) being used for strapping articles (2) into bundles by automatically tightening an integrated cable tie (14) by the automatic strapping tool device (1), the automatic strapping tool device (1) comprising: - a tensioning mechanism (10), comprising: a tensioning gear unit (11) having a tensioning gear (11a); and a tensioning roller unit (12) having two tensioning rollers (12a, 12b), a gap (13) being formed between the tensioning gear (11a) and the tensioning rollers (12a, 12b), wherein the gap (13) is configured to hold a strip (14a) of a corresponding one-piece cable tie (14) processed by the automatic strapping tool device (1), and the tensioning gear (11a) of the tensioning gear unit (11) includes teeth (11b) configured to fit into the serrations (14b) of the strip (14a) of the one-piece cable tie; Its characteristics are: The tensioning roller unit (12) includes the two tensioning rollers (12a, 12b) having respective adjusting elements, the adjusting elements being configured to adjust the respective distances between the two tensioning rollers and the tensioning gear, thereby adjusting the width of the gap (13), wherein the tensioning mechanism (10) includes a motor for automatically adjusting the minimum distance between the tensioning rollers (12a, 12b) and the tensioning gear (11a) according to the thickness of the strip (14a) of the integrated cable tie (14) in response to a control signal from a control unit (5).

15. The automatic strapping tool device (1) according to claim 14, characterized in that: The motor is also used for automatically adjusting the position of the tensioning rollers (12a, 12b) relative to the tensioning gear (11a) in response to a control signal from the control unit (5).

16. The automatic strapping tool device (1) according to claim 14, characterized in that: The tensioning mechanism (10) comprises a first limiter (15a) and / or a second limiter (15b), wherein the first limiter (15a) and / or the second limiter (15b) respectively predetermine a fixed first limit, i.e., a lower limit, and / or a fixed second limit, i.e., an upper limit, for the width (w) of the gap (13).

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