DK201470517A1 - Clamping II - Google Patents

Abstract

Clamping machine (20) for extending a straightening (1) of the type comprising a threaded spindle (7), a spring (8), and a socket part (5) with at least one torque support (13) and with clamping - Looseners (35) for threaded spindle (7) and spring (8), wherein the clamping machine (20) comprises a swivel (32), on which is mounted a holder (26) for a stretch tan shank (4), the holder (26) comprising an engagement top face (33), a bottom face (31), and a retaining mechanism (27), wherein the holder (26) further comprises an opening (30) between the engagement top face (33) and the bottom face (31), the opening (30) thereof. at least corresponds to the cross-section of a tensioning clamping / loosening means (11), and wherein the clamping machine (20) further comprises clamping / loosening means (35) adapted and intended for engagement with a stretching clamping / loosening means (11), thereby obtaining a pen machine (20) capable of clamping stretchans (1) quickly, easily and without any environmental or work environment nuisance the personnel to use and operate the clamping machine (20).

Description

P20716DK01

Clamping II

The present invention relates to a tensioning machine for extending a stretch tan of the type comprising a threaded spindle, a ladder, and a socket part preferably with at least one torque support as well as with tensioning / release means for threaded spindle and spring.

Prior art

Stretchers for extending a stretch tane are not yet commercially used in the leather industry, as tectanes are not used. With the amount of tans used on, for example, a mink farm, the transition to stretch tans will depend on how quickly and easily such a stretch tane can be tensioned.

Stretch or tane, in this context, is a term which covers a stretch tane for a fur animal skin, wherein the stretch tan comprises, generally speaking, an elongated workpiece having a surface and a longitudinal axis, the surface being adapted for abutment on a fur side of a fur animal skin, wherein the elongated surface comprises a snout end and a socket end, and wherein the strutan at said socket end comprises a socket portion, for example for placement of the strechan in a holding system.

The stretchan is divided into at least two axially displaceable stretchan sections in the longitudinal direction of the stretchan, where in the stretchan axial displacement means are arranged for axial movement of at least one stretchan section relative to at least one other stretchan section.

The object of the invention

It is thus the object to provide a tensioning machine of the kind specified in the introduction, which will be able to tension the stretchers quickly, easily and without any environmental or working environment nuisance for the personnel who must use and operate the tensioning machine.

Description of the Invention

According to a first aspect of the invention, the above-mentioned object is achieved with a tensioning machine for extending a stretch tane of the type comprising a threaded spindle, a spring, and a socket part (preferably with at least one torque support and with tensioning / detaching means for threaded spindle and springs as initially described and as described in the preamble of claim 1, wherein the clamping machine comprises a swivel device on which a bracket for a straightening pedestal end is mounted, the bracket comprising an engagement top face, a underside and a retaining mechanism, the bracket further comprising an opening between the engagement top and the underside, wherein the opening at least corresponds to the cross-section of a tensioning / loosening means, and wherein the tensioning machine further comprises tensioning / loosening means adapted and intended for engagement with a tensioning / loosening means.

Various types of springs can be used for use in connection with the invention, for example torsional springs or compression springs.

This makes it possible to tighten stretchers quickly, easily and without any environmental or working environment nuisances for the personnel who must use and operate the tensioning machine. With a swivel device, it is possible to turn the strectan during the application of the fur animal skin, so that the snout end of the skin is placed on the snout end of the stretchan and the tail end of the skin is pulled down towards the pedestal socket, where the skin is fixed with fixing means, in the form of a stretchan lock. Thereafter, the strap can be turned by means of the tensioning machine rotating device, so that the operator can arrange the skins perfectly and partly easier and easier by fixing the fastener / strap lock on both sides of the strap without necessarily having to turn around the strap.

With the clamping / loosening means of the tensioning machine, the tensioning / loosening means of a stretching tan can be activated so that the threaded spindle of the stretching rod is tightened to a predetermined torque, after which the stretching spring is subsequently tightened to a similarly predetermined torque, which ensures that the tan stays under constant pressure throughout the drying process. and thus in the longitudinal direction of the stretchan.

After the drying process, the operation can be carried out in reverse order, that is, the clamping / loosening means of the tensioning machine can activate the clamping / loosening means of the strap so that the spring is rotated in the opposite direction and thus loses its spring tension, after which the thread spindle is turned back until the strap is not in its -tightened position again. However, the threaded spindle and the spring can also be rotated simultaneously, even at different rotational speeds, so that the spring is simultaneously relaxed.

The present invention also relates, in another aspect, to a tensioning machine, wherein the retaining mechanism in the engagement top comprises engagement means for engagement with at least one torque support on a stretch tan, where the engagement means are substantially congruent with the torque support. The torque supports act as a kind of guide pins to help the operator get the tan quickly and safely in place and partly they have a stabilizing effect for the tan during the restraint operation and they can also be designed for use as air ducts.

Where torque supports are used as air ducts, advantageously in the tensioning machine there may be engagement means including pins, possibly a form of rubber-coated pins intended for interaction with the torque supports.

This makes it possible, quickly and easily, to ensure that a stretch tane is held securely during the stretching of fur animals and without the risk of injury to personnel during the stretching of a fur.

Advantageously, two torque supports and preferably symmetrical torque supports may be used, as it will facilitate the handling of a stretch tan if it is subordinate to which side to turn, for example, the operator.

The present invention also relates, in a third aspect, to a clamping machine, wherein the retaining mechanism further comprises engagement means for engagement with a fixing grip on a stretch tan, where the engagement means are, for example, electrically actuated, electrically actuated, hydraulically or pneumatically actuated.

With the fixing grip of a strap and with the clamping means of the tensioning machine, it is possible to ensure a firm hold of the strap during the stretch and thus also ensure that the tension applied to the strap through the thread's spindle and spring also causes a correct stretch of the strap.

The present invention also relates, in a fourth aspect, to a clamping machine in which the clamping / release means of the clamping machine have a center line which is coaxial with the tensioning / loosening center line of the strap when the strap is mounted in the clamping machine, and where the clamping / release means of the clamping machine can movable axially and / or radially, wherein the clamping / loosening means of the tensioning machine comprise internal clamping / loosening means and external clamping / loosening means, where the internal clamping / loosening means are intended to engage a threaded spindle and the outer clamping / detachable means are intended for engagement with a tensioning spring and the inner tensioning / detaching means and the outer tensioning / detaching means have coaxial center lines.

This makes it possible to ensure correct contact between the tensioning and loosening means of the straightening and tensioning machine, respectively, when they have coaxial center lines.

By always starting the clamping / loosening means in the starting position in the same way, with a corner, an edge or a flat in the same place, there is a guarantee that the clamping / loosening means of the clamping machine in axial contact with the tensioning / loosening means of the strapping fits and can immediately engage, a guarantee that is ensured by the tensioning / loosening means of the tensioning machine being rotated or clocked so that there will always be a corner, edge or surface at the same place when the operation is completed.

The clamping / loosening means of the clamping machine are placed on an arm which is movable so that the clamping / loosening centerline of the clamping machine remains coaxial with the center line of the clamping / loosening means. This movement in the axial direction is made by, for example, an actuator. Likewise, the mutual displacement of the clamping machine's internal clamping / loosening means and external clamping / loosening means can be made by a plurality of actuators, while the radial clamping / loosening movements can be made by a plurality of screwdrivers or electric / pneumatic torque wrenches.

The present invention also relates in a fifth aspect to a clamping machine in which the clamping / release means of the clamping machine are mechanically, electrically, hydraulically or pneumatically actuated.

This makes it possible to stretch the stretch tan without manual loading and fully or semi-automatically.

In addition, the clamping machine can have many different embodiments, depending on the design of the stretching clamping / loosening means, but also depending on the stretching machine's possibilities, ie space, and the designers' use / experience with torque wrenches, etc. ffa other context.

The present invention also relates, in a sixth aspect, to a tensioning machine, wherein the tensioning / release means of the tensioning machine comprise means for adjusting pressure and / or torque.

This makes it possible to stretch the stretchan with the same force every time, whether it is a male or a female skin to be stretched on a male or a female stretch.

The present invention also relates in a seventh aspect to a clamping machine in which all or part of the clamping machine is height adjustable.

This makes it possible to adjust the height of the clamping machine, whether the staff operating the clamping machine is high or less high, which also ensures a better and healthier working environment for the staff.

The present invention also relates, in an eighth aspect, to a tensioning machine in which the tensioning machine is activated by hand, knee or foot pressure connected to, for example, an electrical, a pneumatic or a hydraulic contact.

This makes it possible to arrange the clamping machine with several activation possibilities, but it will also be possible for the staff, for example, to hold a strainer with their hands while releasing the strainer via a knee or foot pressure.

The invention is also directed to a method of using a clamping machine, the method basically comprising a clamping machine as described above, the method of course having all the advantages of the clamping machine according to the invention.

The drawing

The invention will now be explained in more detail by describing non-limiting embodiments with reference to the drawings, in which:

FIG. 1 shows a non-tensioned stretching tuck in separate condition,

FIG. 2 shows an unstressed stretch tane,

FIG. 3 shows a tense stretch tane,

FIG. 4 shows the tensioning machine in perspective with the stretchers,

FIG. 5 shows the tensioning machine from the side with the stretchers,

FIG. 6 shows the clamping machine from the operating side,

FIG. 7 is a perspective view of the tensioning machine without the tensioners,

FIG. 8 is a perspective view of the clamping machine,

FIG. 9 shows the clamping / release means of the tensioning machine in axial direction,

FIG. 10 is a side view of the clamping / release means of the tensioning machine.

List of references 1 Straightening 2 Surface 3 Sling end 4 Socket 5 Socket part 6 Straightening section 7 Threaded spindle 7c Center line, threaded spindle 8 Torsion spring 8c Center line, torsion conductor 9 First end, torsion guide 10 Second end, torsion guide 11 / solvents 12 Thread section, threaded spindle 13 Torque support 13c Center line, torque support 14 End surface, pedestal part 15 Internal means, Clamping / detaching means 15c Center line, Internal clamping / detaching means 16 Outer means, Clamping / detaching means 16c Center line, External clamping solvents 17 18 Fingers 19 Skirt 20 Clamping machine 21 Operator 22 One side of the strutan 23 The other side of the strutan 24 Foot pressure 25 Actuator 26 Holder 27 Retaining mechanism 28a Engaging means, for torque support 28b Engaging means, for fixing grips 29 Fixing handles 30 Opening 31 Bottoming 32 Turning device solvents, tensioning machine 35c Center line, Clamping / detachable, clamping machine 36 Special wrench 36c Centerline, special key 37 Internal clamping / detaching, clamping machine 37c Centerline, Internal clamping / detaching, clamping machine 38 Fill hexagon 39 Outer clamping / detaching, clamping machine 39c Center / solvents, tensioning machine 40 Large hexagon 41 Actuator

Detailed description of the invention

A tensioning machine for extending a tensioning rod of the type comprising a threaded spindle, a spring, and a pedestal with a torque support and with tensioning / detaching means for threaded spindle and spring, and a tensioning rod of the type comprising a threaded spindle, a spring , and a pedestal part with a torque support as well as with tensioning / release means for threaded spindle and spring are shown in Figures 1-10.

For the sake of understanding the functioning of the tensioning machine, the description begins with an explanation of what a tensioning machine is and how it works, and then the explanation of the present invention, the tensioning machine, follows.

Thus, Figure 1 shows a non-tensioned stretching member 1 in a separate state, with a surface 2, a snout end 3, a socket end 4, and a pedestal part 5. The stretching ring 1 is divided into several stretching sections 6, which are axially displaceable in the longitudinal direction of the stretching. so that the stretch 1 can be extended and contracted. When a fur animal skin is to be stretched, the fur animal skin is mounted on a non-tensioned stretch tan 1 such that the snout end of the skin is arranged at the snout end 3 of the stretchan and the rear end of the skin (the part with the tail) at the socket end 4 of the stretchan, and the skin is fixed to the stretch means 1 with shown in Figures 2 and 3), so-called stretchan locks 17. On the lower part of Figure 1, where the interior of the stretchan 1 can be seen, a threaded spindle 7 extending from the base of the stretchan 5 to the outermost stretchan section 6 is shown. comprising the screw end 3. Around the threaded spindle 7, starting from the socket end 4, there is a torsion spring 8 having a first end 9 engaging the threaded spindle 7, and a second end 10 engaging the clamp. / solvents 11 located submerged in the base 5. The thread spindle 7 is divided into a plurality of thread sections 12, each thread section 12 having an external thread and each stretch section 6 comprising a counterbalance. nth internal thread. Thus, it is also seen from Figure 1 that the torsion spring 8 stops axially where the lower thread section 12 starts.

The pedestal part of the straktan 5 has two torque supports 13, which are tapered fixing supports for use in handling / placing the straktan 1 in, inter alia, tensioning machines and dryers. The torque supports 13 are here designed hollow and thus as pipes, so that they can act as air ducts in connection with drying processes. The pedestal socket portion 5 comprises an end surface 14 which lies in a plane perpendicular to the centreline 7c of the strap and thread spindle. Also, the center lines 13c of the torque supports are perpendicular to the end plate 14. When the tensioner 1 is unable to push and stretch the skin further in the axial direction, under tension of the threaded spindle 7, a tension is made by the torsion spring 8, thereby creating the advantageous possibility of maintain a sustained impact on the skin in the longitudinal direction of the stretchan, the rotation of the torsion spring affecting the stretchan in the longitudinal direction of the stretchan. When fur skins are to be removed, the fixing means 17 are loosened, whereby the tensioned torsion spring 8 rotates the threaded spindle 7 to the maximum length of the strutan, whereby the skin is detached from the strutan 1. An alternative possibility may be that in the stratan outer stretchnan section 6 there is an ejector not shown. is capable of bumping the skin of the stretch 1.

The clamping / unloading means 11, which are merely indicated herein, are in a preferred embodiment of inner means 15 in the form of a screw suitable for a hexagonal key, the screw being located in the center of the outer means 16, which is also constituted by a screw for a hexagonal wrench. Thus, the small hex key can be used alone, just as the large hex key can be used alone. It can also be seen from the figure that the center line 7c of the threaded spindle, the center line 8c of the torsion spring, the center line 1c of the clamping / release members, and the center line 15c of the inner means and the center line 16c of the outer means are all coaxial.

As later explained in Figures 9 and 10, a special key can be formed in which a small hexagon sits in coaxial extension of a large hexagon and so that the inner means 15 as the outer means 16 are activated simultaneously.

Furthermore, Figure 1 shows the other half of the strectane 1 as separate shell parts, the so-called strectane sections 6, whereby it is easier to see how a stretchane 1 is constructed.

Fig. 2 shows a cantilever 1, similar to the non-cantilever cantilever 1 shown in Fig. 1, merely in an overall version, while Fig. 3 shows the same cantilever 1 as shown in figure 2, but shown here as a tense cantilever 1, wherein the threaded spindle 7 is thus driven in an outer position and where the torsion spring 8 is also tensioned and thus holds the strectane sections 6 under a sustained influence in the longitudinal direction and in the separate position. In addition, in Fig. 2 and Fig. 3 it is seen that the stretch tan 1 is attached to fixing means 17, in the form of a stretch tan lock.

Between the stretching sections 6 are seen support means which here include fingers 18 on the surfaces 2 and at the side edges, and skirt 19 at most of the periphery of the lower end of a section. In this way, it is ensured that a skin does not "fall" into the narrower area between two stretching sections 6 when pressed apart as shown in Figure 3. In Figure 4 and Figure 5, a clamping machine 20 according to the invention is shown in one embodiment. viewed in perspective and from the side respectively, where one also sees the tensioning machine 20, which engages with a tensioning device 1 and where an operator 21 is depicted to indicate what size ratio can be, for example, between operator 21, stretching control 1 and tensioning machine 20. Fig. 5 shows what is considered to be the one side 22 of the stretchan and the other side of the stretchan 23. In figure 6 a tensioning machine 20 is seen from the operating side, where a stretchan 1 with fixing means 17 is inserted in the form of a stretchan lock, and where a monitor is used for use by the operator 21, as well as a footprint 24 for operating / activating the tensioning machine 20. A figure 6 shows that all r parts of the clamping machine 20 are height adjustable by a raise-lowering mechanism in the form of an actuator 25, but the clamping machine 20 could alternatively also be height-adjusted in other ways, for example by means of springs or a manual crank and a worm drive. In Figure 7, the clamping machine 20 is viewed in perspective without the tensioners 1, where it is seen that the holder 26 has a retaining mechanism 27 with both engagement means 28a for interaction with the torque support (s) 13, and with engagement means 28b for interaction with and the holder 26 has an aperture 30 for insertion of a pedestal socket 4 and pedestal 5.

The perspective of the drawing does not make it possible to see the underside 31, which can be seen in FIG. 6th

The alternative to the upright tensioning machine 20 shown here, in which the stretching pins 1 are thus substantially vertical during the stretching / tensioning, could be lying or otherwise angled tensioning machines 20, which can be varied according to working function and the stretching's approach to tensioning machines 20, and according to whether the skin has already been drawn on the tensioning pins 1 before the stretching pins 1 reach the tensioning machine 20. In figure 8 a section of the tensioning machine 20 is seen in perspective, where Figure 8 shows a section of a tensioning machine 20 for extending a stretching tension 1 of the type comprising a threaded spindle 7, a ladder 8, and a pedestal 5 with at least one torque support 13 and with clamping / loosening means 11 for threaded spindle 7 and spring 8, the clamping machine 1 comprising a pivot device 32 on which a holder 26 for a pedestal 4 is mounted wherein the holder 26 comprises an engagement top 33, a bottom 31 and a retaining mechanism 27, wherein the holder 26 further, an opening 30 comprises between the engagement top 33 and the bottom 31 (which can be seen in FIG. 6), the opening 30 (which can be seen in FIG. 7) at least corresponds to the cross-section of a tensioning / loosening means 11, and the clamping machine 20 further comprises an arm 34 having a direction of movement perpendicular to the underside 31 of the holder, perpendicular to an inserted tensioning member 1, and wherein the arm 34 further has clamping / loosening means 35 with a center line 35c coaxial with the tensioning of a stretching member. / loosen the center line 1 lc of the tensioning machine, where the clamping / loosening means 35 of the clamping machine is adapted to and intended for engagement with a clamping / loosening means 11. of a tensioning 20 It is also seen in Figure 8 that the retaining mechanism 27 comprises engagement means 28b for engagement with fixing grips 29 (seen in Figures 1, 2 and 3) on a tensioning 1, where the engaging means 28b are, for example, spring-actuated, electrically actuated, hydraulically or pneumatically actuated. There are many options for designing the retaining mechanism 27, but in a preferred embodiment, the retaining mechanism 27 will comprise two parts positioned opposite each other on the holder 26, thus being able to engage the fixing grips 27. Alternatives may and will depend on the fixing grips 29 of the stretching members. how they are designed, their dimensions, etc. In the embodiment of fixing grip 29 shown in Figures 1, 2 and 3, the engaging means 28b will be of a round or semi-circular nature and a dimension corresponding to the fixing grip 29 of the stretching 1.

The clamping / loosening means 35 of the clamping machine are positioned on the arm 34 which is movable such that the center line 35c of the clamping / loosening means remains coaxial with the center line 11c of the tensioning clamping / release means. This movement in the axial direction is made by, for example, an actuator 41.

For activating the clamping machine 20, one or more types of pressure, for example hand, knee or foot pressure, can be used. Double handshakes can be used to ensure that the operator 21 does not have one hand in engagement with the clamping machine 20. Alternatively, guards may be of such a nature and condition that the operator 21 is not able to get his hands and the other clamped during the stretch. of the stretching pins 1.

The clamping / loosening means 35 of the clamping machine may be mechanically, electrically, hydraulically or pneumatically actuated or otherwise affected, and the clamping / release means 35 may be connected to a compressive force sensor.

Fig. 9 and Fig. 10 show an example of the clamping / loosening means 35 of the clamping machine, which can be replaced according to the design of the clamping / loosening means 11 of the straitan, but in this example, the clamping / loosening means 11 of the strapping are constituted by internal means. 15 in the form of a screw suitable for a hexagonal wrench, the screw being located in the center of the outer means 16, which is also constituted by a screw suitable for a hexagonal wrench.

Thus, Figures 9 and 10 show a specially designed wrench 36 in which the internal clamping / release means 37 for engagement with the inner clamping / release means 15 of the tan, which engage the threaded spindle 7, in this case constitute a small hexagon 38, while the outer clamping / release means 39 for engagement with the outer clamping / release means 16 of the tan, which engage the spring 8, in this case constitute a large hexagon 40.

The inner clamping / release means 37 are co-axially extending the outer clamping / release means 39 and so that the inner means 37 as the outer means 39 can be activated simultaneously or separately.

Thus, the small hexagon 38 can be used alone, just as the large hexagon 40 can be used alone. From Figure 10, it can be seen that the special key center line 36c, the small hexagon center line 38c, and the large hexagon center line 40c are all coaxial.

As can be seen in Figures 9 and 10, the small hexagon 37 is located in the center of the large hexagon 38, but although the small hexagon 37 is part of the overall special key, the small hexagon 37 can also be used alone, with the small hexagon 37 sits on its own drive shaft which is independent of the drive shaft of the large hexagon and so that the large hexagon 38 can also be used alone. For the same reason, the two hexagons 37, 38 are axially displaceable relative to each other and are thus not an integrated welded unit. Thus, by using such a flexible special key where a small hexagon 37 is coaxially extended by a large hexagon 38 and where the two hexagons can be used together or separately, it is thus possible to activate the internal means 15 of the tan as the external means. 16 either individually or simultaneously.

Figure 10 is a side view of the clamping / release means 11, with the small hexagon 37er located at the center of the large hexagon 38.

The mutual displacement of the tensioning machine's internal clamping / loosening means 37 and outer clamping / loosening means 39 can be made by a plurality of actuators, while the radial clamping / loosening movements can be made by a plurality of screwdrivers or electric / pneumatic torque wrenches.

The invention is not limited to the above-mentioned embodiments which merely serve to clarify the preferred embodiments of the invention. It is thus clear that, after studying this writing, one skilled in the art will be able to carry out variants of the invention which are not described in detail in this publication.

Claims (10)

A tensioning machine (20) for extending a stretch tane (1) of the type comprising a threaded spindle (7), a spring (8), and a socket part (5) preferably with at least one torque support (13) and with tensioning / loosening means (11) for threaded spindle (7) and spring (8), characterized in that the tensioning machine (20) comprises a swivel device (32), on which is mounted a holder (26) for a tensioning socket end (4), where the holder (26) comprises an engagement top (33), a bottom (31) and a retaining mechanism (27), the holder (26) further comprising an opening (30) between the engagement top (33) and the bottom (31), the opening (30) at least corresponding to the cross-section of a tensioning clamping / loosening means (11), and wherein the clamping machine (20) further comprises clamping / loosening means (35) adapted and intended for engagement with a stretching clamping / loosening means (11). Tensioning machine (20) according to claim 1, characterized in that the retaining mechanism (27) in the engagement top (33) comprises engagement means (28a) for engagement with at least one torque support (13) on a tensioning (1), wherein the engagement means (28). ) are essentially congruent with the torque support (13). Tensioning machine (20) according to claim 2, characterized in that the retaining mechanism (27) further comprises engagement means (28b) for engagement with a fixing handle (29) on a tensioning member (1), wherein the engagement means (28b) are, for example, spring-actuated, electrically influenced, hydraulically or pneumatically influenced. Clamping machine (20) according to any one of claims 1 to 3, characterized in that the clamping / loosening means (35) of the clamping machine have a center line coaxial with the center line (11) of the tensioning clamping means (11) when 1) is mounted in the clamping machine (20) and wherein the clamping / loosening means (35) of the clamping machine are movable in the axial and / or radial direction, and wherein the clamping / loosening means (35) of the clamping machine comprises internal clamping / loosening means (37) and outer clamping / detaching means (39) and wherein the inner clamping / detaching means (37) and the outer clamping / detaching means (39) have coaxial center lines (37c, 39c). Clamping machine (20) according to any one of claims 1 to 4, characterized in that the clamping / release means (35) of the clamping machine are mechanically, electrically, hydraulically or pneumatically actuated. Clamping machine (20) according to any one of claims 1 to 5, characterized in that the clamping / release means (35) of the clamping machine comprise means for adjusting pressure and / or torque. Clamping machine (20) according to any one of claims 1 to 6, characterized in that all or part of the clamping machine (20) is height adjustable. Clamping machine (20) according to any one of claims 1 to 7, characterized in that the clamping machine (20) is actuated by hand, knee or foot pressure (24). A method of using a tensioning machine (20) according to the invention, for extending a tensioning (1) characterized in that the method comprises the following steps: A. A pedestal (1) socket (4) is inserted into the holder (20) of the tensioning machine (20). 26), B. the retaining mechanism (27) of the holder (26) is engaged by the fixing lever (29) of the tensioning member (1), C. The clamping / loosening means (35) of the tensioning machine are brought into engagement with the tensioning / loosening means of the strapping (11). D. the clamping / release means (35) of the clamping machine are stopped at the preset pressure and / or torque obtained, E. the clamping mechanism (27) is deactivated, F. the strap (1) is removed from the clamping machine (20). The method of using a clamping machine (20) according to claim 8, characterized in that the method further comprises the following steps between steps B and C: B '. the skin is locked to one side (22) of the stretching (1) by fixing means (17), B ”. the tensioning member (1) is rotated to the other side (23) by means of the swivel device (32), the B ”lock is locked to the other side (23) of the stretching member (20) by means of fixing means (17).