Binding machine head of binding device and binding device

Abstract

A strapping machine head of a strapping device and the strapping device, the strapping machine head comprising: a transport unit, a strapping tape guide channel, a tensioning unit and a coupling unit, in which a first transport roller and another transport roller are operatively connected to each other and are driven by the same drive motor, the motors being continuously driven in the same direction, the first transfer roller and the other transfer roller are assigned to a mechanical transmission, in particular to a gear transmission, comprising a forward clutch and a retraction clutch designed to be activated alternately, the retraction clutch being disengaged and the first transfer roller being driven in a first direction when the forward clutch is activated and the second transfer roller being driven in a second direction when the retraction clutch is activated. One transfer roller transmits an advancing movement to the strapping tape by being driven, in particular in a direction opposite to the rotation of the motor, when the retraction clutch is activated, the advancing clutch disengages and the other transfer roller transmits a retraction movement to the strapping tape by being driven, in particular in the direction of rotation of the motor, when the retraction clutch is activated. The bundling process is more accurate and reliable.

Description

Technical Field

[0001] The utility model relates to a strapping machine head according to a strapping device for strapping one or more articles with a strapping belt, and the strapping machine head comprises:

[0002] a transfer unit comprising a first transfer roller and a further transfer roller, the transfer rollers being designed to transfer alternately an advancing movement and a retracting movement to the strapping,

[0003] a strapping guide channel designed to guide the strapping during its forward movement so that the strapping forms a loop around the objects to be strapped, wherein at least two portions of the strapping overlap each other;

[0004] a tensioning unit for applying a strapping tension to the loops of the strapping, the tensioning unit comprising a tensioning roller for transmitting a tensioning movement on the strapping, and

[0005] - a joining unit for joining, in particular welding, the overlapping strapping parts in order to permanently fix the strapping loop.

[0006] The utility model also relates to a strapping device, which comprises the strapping head, a controller for controlling the strapping head and at least one supply device for storing strapping bands (especially strapping bands) and making the strapping bands available. Background Art

[0007] The strapping device is used for packaging various articles by placing a strapping band around the article so that two parts of the strapping band overlap each other by forming a loop around the article. Thereby, the free end part of the strapping band usually overlaps with another section of the strapping band, wherein the free end part forms a lower strapping band part and the other section of the strapping band forms an upper strapping band part. The overlapping parts of the strapping band are connected to each other by a strapping device, which is used to tighten the strapping band and connect the overlapping parts of the strapping band. Various connection techniques can be used to connect the overlapping parts, such as welding, crimping, gluing, etc., depending on the article to be strapped and / or the material of the strapping band. For example, friction welding is advantageously used for plastic strapping bands, while additional clamps can be used to connect metal strapping bands.

[0008] The process of tensioning a strap placed around an article, joining overlapping portions of the strap using a strapping head, and releasing the strapping head from the tensioned and joined strap loop involves various operating elements of the strapping device designed to optimize the packaging of one or more articles.

[0009] For example, US2019 / 0046819 A2 describes a strapping device that can be designed as a stationary device for applying one or more strapping bands, in particular strapping bands, to a larger package or to multiple individual packages assembled into a single unit. Universal strapping devices generally have a strapping band guide channel, in particular a wraparound band channel, in which the strapping band is guided to form a ring around the package during its forward movement. In the strapping band guide channel, a so-called strapping head can be arranged to perform strapping movements, tensioning and linking (in particular connection) operations on the strapping band. The strapping band is generally made of metal or plastic material and is pulled out of a supply roll and wrapped around the packaged article as an annular strap. For this purpose, the free end of the strapping band is introduced at high speed, in particular, it is shot into the strapping band guide channel of the strapping head. Once the strap end reaches a specific position in the strapping band guide channel, the strap end is clamped and then retracted. As a result, the strapping loop is tightened and the strapping is passed out of the strapping guide channel and into contact with the packaged items. Subsequently, the strap is tensioned, wherein tension is applied to the strap, the strapping loop is provided with a fastener by means of the coupling unit, and the strapping is cut from the supply roll. The strapping device is generally adapted to the type of strapping used, in particular with regard to the coupling device which permanently connects two overlapping sections of strapping.

[0010] The strapping head usually has a transfer unit including a strap feed having a driven transfer roller for advancing the strapping strap during loop formation and for retracting the strapping strap after loop formation to bring it into contact with the package.

[0011] In order to increase or improve the tension acting on the strapping in contact with the package and thereby ensure a tight fit of the strapping, the strapping head comprises a tensioning unit comprising a tensioning device with at least one tensioning roller, in particular a tensioning wheel.

[0012] The transmission and tensioning components are usually equipped with a plurality of rollers which impart various movements to the strapping belt, depending on the function to be performed. Typically, pairs of rollers are used, which are pressed against opposite sides of the strapping belt and clamp the strapping belt between them, in order to transmit the rotational movement generated by the motor to the strapping belt as a feed movement, a retraction movement or a tensioning movement.

[0013] The transmission part and tensioning part of the strapping device disclosed in US2019 / 0046819 A2 include three rollers. One roller can rest on a tensioning wheel or a (transmission) roller. The roller is not driven to rotate, but is pivotally articulated by a pivoting device. By pivoting movement, the pivotable roller used as a pairing roller can be placed in contact with the transmission roller or with the tensioning wheel. Depending on which roller the pairing roller rests against, the pairing roller then forces the belt to rest against the corresponding roller, so that the corresponding roller can transmit the rotational movement of the belt to the strapping belt as an advance / feed, retract or tensioning movement. Utility Model Content

[0014] Starting from the above-mentioned shortcomings and deficiencies and taking into account the prior art, the purpose of the present invention is to further develop a strapping head as described in the technical field and a strapping device as described in the technical field, so as to improve the structure and function of the strapping head in such a way.

[0015] The object of the utility model is achieved by a strapping machine head including the features described in the utility model and a strapping device including the features described in the utility model. The utility model discloses advantageous embodiments and advantageous improvements.

[0016] The utility model relates to a strapping machine head of a strapping device, wherein the strapping machine head straps one or more articles with a strapping belt, and the strapping machine head comprises: a transmission unit, wherein the transmission unit comprises a first transmission roller and another transmission roller, wherein the transmission roller is designed to alternately transmit an advancing motion and a retracting motion to the strapping belt; a strapping belt guiding channel, wherein the strapping belt guiding channel is designed to guide the strapping belt during the forward motion of the strapping belt, so that the strapping belt forms a loop around the articles to be strapped, wherein at least two parts of the strapping belt overlap each other; a tensioning unit, wherein the tensioning unit is used to apply a strapping belt tension to the loop of the strapping belt, wherein the tensioning unit comprises a tensioning roller for transmitting a tensioning motion on the strapping belt; and a connecting unit, wherein the connecting unit The invention relates to a device for connecting overlapping strapping strap portions in order to permanently fix the loop of the strapping strap, wherein the transport rollers are operatively connected to each other and are driven by the same drive motor, wherein the motor is driven continuously in the same direction, and the transport rollers are assigned to a mechanical transmission device, which comprises a forward clutch and a retraction clutch, wherein the forward clutch and the retraction clutch are designed to be activated alternately, wherein when the forward clutch is activated, the retraction clutch is disengaged and the transport roller transmits a forward movement to the strapping strap by being driven in a first direction, and wherein when the retraction clutch is activated, the forward clutch is disengaged and the transport roller transmits a retraction movement to the strapping strap by being driven in the opposite direction.

[0017] In one or more embodiments, the tensioning roller comprises a profile on its circumferential surface, the profile being designed to improve the engagement of the tensioning roller on the strapping strap.

[0018] In one or more embodiments, the profile is inclined in the tensioning movement direction and engages only in the tensioning movement direction.

[0019] In one or more embodiments, the first transport roller, the further transport roller and the tensioning roller are driven by the same drive motor and wherein the tensioning roller is assigned to a tensioning clutch by means of which the power transmission between the motor and the tensioning roller can be disconnected.

[0020] In one or more embodiments, at least one braking mechanism is operably engaged with the tensioning roller and is designed to prevent rotational movement of the tensioning roller when power transmission between the motor and the first transmission roller is disengaged.

[0021] In one or more embodiments, at least one lifting mechanism is operably engaged with the tensioning roller to move the tensioning roller from a first position in which the tensioning roller contacts the strapping strap to a second position in which the tensioning roller is spaced apart from the strapping strap so that the strapping strap can be retracted in a direction opposite to the direction of movement of the strapping strap without contacting the tensioning roller.

[0022] In one or more embodiments, the strapping machine head further includes a strapping strap protection mechanism, the strapping strap protection mechanism comprising at least one pivotable protection element, the pivotable protection element being capable of pivoting between a pivot position and a swing-out position, wherein, in the pivot position, the protection element surrounds at least a portion of the tensioning roller facing the strapping strap and protects the strapping strap from contacting the tensioning roller, and in the swing-out position, the protection element releases the portion of the tensioning roller facing the strapping strap, thereby allowing the tensioning roller to contact the strapping strap.

[0023] In one or more embodiments, the joining unit comprises a spring-loaded welding unit for evenly distributing the joining force when joining the overlapping strap portions.

[0024] In one or more embodiments, the strap guide channel includes an adjustable strap guide mechanism for accommodating different strap widths.

[0025] The utility model also provides a strapping device, which is used for strapping one or more articles with a strapping belt, wherein the strapping device includes the strapping head described in one or more embodiments, and at least one controller for controlling the strapping head and at least one supply device for storing the strapping belt and making the strapping belt available.

[0026] The invention is based on the idea that the transport rollers are driven by the same drive motor and are configured to transmit an advancing movement or a retracting movement alternately to the strapping belt.

[0027] The motors run continuously in the same direction, and the drive of the motors is transmitted to the transport rollers via a mechanical transmission, such as a gear transmission. The transport rollers are operably connected to each other, for example, by meshing gears. The mechanical transmission comprises two clutches, namely: a first transport roller clutch, in particular a forward clutch; and a second transport roller clutch, in particular a retraction clutch. These clutches can be selectively actuated, and when one clutch is engaged, the other clutch is disengaged.

[0028] The forward clutch and the retraction clutch may be alternately released (in other words, disengaged or deactivated) and coupled (in other words, engaged or activated) to allow the direction of motion transmitted by the transfer roller to the strapping strap to be reversed.

[0029] According to a preferred embodiment of the utility model, the mechanical transmission device comprises: a first pulley assigned to the first transmission roller clutch, such as an advance pulley connected to the advance clutch; and a second pulley assigned to the second transmission roller clutch, such as a retraction pulley connected to the retraction clutch. These advance pulleys and retraction pulleys are driven by a motor through a belt, in particular a toothed flat belt.

[0030] When the forward clutch is activated, the retraction clutch is disengaged, and the transmission roller transmits the forward motion to the strapping band. In this case, the transmission roller contributes to the feeding motion of the strapping band.

[0031] In order to facilitate the feeding movement of the strapping belt, according to a preferred embodiment of the utility model, the mechanical transmission device further comprises: a first gear assigned to the forward clutch, specifically a forward clutch gear; and another gear assigned to the retraction clutch, specifically a retraction gear. The retraction clutch gear is connected to the first transmission roller via a transmission shaft.

[0032] When the forward clutch is activated, the power transmission between the other gear connected to the retraction clutch is disconnected. Subsequently, both the forward pulley and the forward clutch gear rotate in conjunction with each other in the driving direction of the motor. On the contrary, the retraction clutch gear meshing with the forward clutch gear rotates in the direction opposite to the rotation direction of the retraction pulley.

[0033] Thus, when the forward clutch is activated, the power path runs via the forward pulley, the forward clutch gear, the retraction clutch gear and the transmission shaft to the first transfer roller and the further transfer roller.

[0034] On the other hand, when the retraction clutch is activated, the power transmission between the first gear connected to the forward clutch is disconnected. Subsequently, the power path travels to the retraction clutch gear via the retraction pulley and the retraction clutch. Therefore, the first transmission roller rotates as the retraction pulley rotates, thereby transmitting the retraction motion to the strapping belt. At the same time, the forward clutch is disengaged.

[0035] As mentioned above, the forward clutch and the retraction clutch can be alternately released and engaged to reverse the direction of movement transmitted by the transport roller to the strapping strap. During the alternating activation of the clutches, both clutches are briefly disengaged to avoid blocking. Since the pulleys rotate in the same direction, the gears of the forward clutch and the retraction clutch are meshed, and the switching time interval from injection to retraction is very fast, there is a risk of blocking. Therefore, it is advantageous to disengage both clutches before engaging the other clutch.

[0036] According to a preferred embodiment of the invention, the tension is monitored by tracking the current, which increases with the tension. The control unit enables the current to be adjusted when the system is switched off. This essentially means that the control system sets the tension by current limiting.

[0037] According to the preferred embodiment, the tensioning clutch is in active connection with the tensioning roller. Once the desired strap tension is reached, the brake mechanism closes to maintain the strap tension until the holding impression of the upper strap is lowered. When the brake mechanism closes, the tensioning clutch opens, allowing the motor to continue to rotate.

[0038] Independently or in connection therewith, according to a preferred embodiment of the utility model, the first transmission roller and the other transmission roller of the transmission mechanism of the strapping machine head are two smooth driven rollers. The forward movement and retraction movement of the strapping belt can be achieved by selectively engaging or disengaging the forward clutch and the retraction clutch of the transmission gear mechanism.

[0039] In other words, the present invention provides forward and reverse movement or motion of the strapping strap by utilizing gear shifting. Specifically, this is achieved by a gear intermediate stage including a forward clutch and a retracting clutch. Importantly, this forward and reverse motion is achieved while the motor rotates in the same direction.

[0040] The technical advantage of achieving forward and reverse movement of the strapping strap through the clutch while the motor rotates in the same direction is improved efficiency and convenience. This allows seamless and efficient switching between the two directions without reversing the rotation of the motor. This not only simplifies the operation of the strapping device, but also reduces wear and tear on the motor. In addition, this configuration allows for smoother and more precise control of the strapping strap movement, thereby improving the accuracy and reliability of the strapping process.

[0041] The strapping machine head advantageously has a tensioning roller, which has a sawtooth-like toothed portion on its surface. Such a toothed portion enhances the engagement conditions between the tensioning roller and the strapping belt, thereby ensuring a safe and reliable tensioning process.

[0042] The teeth of the toothed portion are preferably inclined in the tensioning movement direction and mesh only in this direction. This ensures that the tensioning roller effectively grasps and tightens the strapping belt during the tensioning process, thereby providing consistent and accurate tensioning results.

[0043] As mentioned above, according to an advantageous embodiment of the invention, the strapping head comprises a brake mechanism which can be activated to block the rotational movement of the tensioning roller when the tensioning clutch is open. This process helps to maintain the strapping tension and thus prevent any potential slippage or loosening of the strapping when the tensioning clutch is disengaged (i.e., the transmission system between the motor and the forward clutch and the retraction clutch is interrupted).

[0044] Advantageously, the strapping head comprises a lifting mechanism which can engage with the tensioning roller to move the tensioning roller from a position in contact with the strap to a position in which the tensioning roller is spaced from the strap. The tensioning roller is only lowered onto the strap for tensioning and is lifted during feeding and retraction so that the strap is not damaged by the teeth. This allows smooth and easy retraction of the strap in the opposite direction without interference with the tensioning roller, in particular without interference with the toothed portion of the tensioning roller.

[0045] Furthermore, the tensioning unit advantageously comprises a strapping strap protection mechanism having movable (e.g. linearly movable or pivotable) protection elements. When in the moved position, these elements surround and shield the portion of the tensioning roller facing the strapping strap, thereby preventing the strapping strap from coming into contact with said portion. In the moved-out position, the protection element releases the tensioning roller, thereby facilitating the tensioning roller to come into contact with the strapping strap for tensioning.

[0046] In addition, the joining unit advantageously comprises a spring-loaded welding unit, in particular a welding clamp. This structural feature ensures a uniform distribution of the forces applied during the joining process, in particular when welding overlapping strapping strap portions. As a result, a safe and reliable connection is achieved.

[0047] Furthermore, in order to ensure an even distribution of the forces applied during the joining process, according to a preferred embodiment of the invention, the joining unit may comprise a bearing surface which is spring-loaded, rotating and designed to support the strapping underneath the welding clamp.

[0048] Independently or in conjunction therewith, the strapping machine head preferably includes an adjustable strapping guide mechanism located in the strapping guide channel. This mechanism allows adaptation to different strapping widths, thereby increasing versatility and compatibility with various strapping materials.

[0049] The utility model finally relates to the use of a strapping head as described above in a strapping device as described above for strapping packages with plastic strapping elements. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] As mentioned above, there are several options to embody and improve the teaching of the present invention in an advantageous manner. Further improvements, features and advantages of the present invention will be explained in more detail below with reference to preferred embodiments and by examples and drawings, in which:

[0051] Figure 1 An embodiment of a strapping device according to the present invention is schematically shown, and the strapping device comprises an embodiment of a strapping head according to the present invention;

[0052] Figure 2 Show Figure 1 The installation position of the clutch and brake of the strapping machine head;

[0053] Figure 3 Schematically shows Figure 1 The transmission gear mechanism of the strapping machine head, especially the principle of the transmission roller gear box;

[0054] Figure 4 Shows Figure 1 Tensioning rollers and for lifting and lowering, in particular for pivoting Figure 1 The tensioning roller mechanism of the strapping machine head;

[0055] Figure 5 Shows Figure 1 The transmission rollers of the strapping machine head and their transmission mechanism principles;

[0056] Figure 6 The exploded view shows Figure 1 A strapping machine head, in particular a transmission unit, a transmission gear mechanism and an adjustable strapping guide mechanism;

[0057] Figure 7 The exploded view shows Figure 1 The strapping machine head, in particular the tensioning unit and its braking mechanism;

[0058] Figure 8 The exploded view shows Figure 1 Strapping machine head, in particular a lifting mechanism for raising the tensioning roller P35.1227, a strapping protection mechanism and an adjustable strapping guide mechanism;

[0059] Fig. 9 The exploded view shows Figure 1 A strapping machine head, in particular a joining unit, namely a friction welding unit; and

[0060] Fig.10 The exploded view shows Figure 1 The invention relates to a strapping machine head, in particular to a transmission gear mechanism of a clutch of the strapping machine head.

[0061] The same reference numerals are used for Figures 1 to 10 The corresponding part in . DETAILED DESCRIPTION

[0062] Figure 1 A strapping device 200 is shown, which is equipped with a strapping head 100, a control unit 220 for managing the mechanisms of the strapping head, and a supply device 210 for storing and supplying straps 12, typically baling tapes.

[0063] All functions of the strapping device 200 are performed using a common motor rotating in one specific direction of rotation, which is achieved by implementing a cam group MH6.0174, in particular camshafts and clutches Y1, Y2, Y3, Y4, Y5 for the various outputs (see Fig.10 ) to achieve it.

[0064] In order to strap one or more items with the strap 12, the strap clamp is released, allowing the strap to be fed into the feed opening of the strapping head 100. The strap is then conveyed at high speed through the strapping head by the transport rollers 1-MH6.1130 and 2-MH6.1130, guiding the strap into the strap guide channel, in particular the strap arch 90.

[0065] To feed the strap and place it around the article to be strapped, the transport rollers 1-MH6.1130, 2-MH6.1130 transfer the advancing motion to the strap 12. As the strap 12 advances, it is guided by the strap guide channel 90, forming a loop in which two sections of the strap overlap around the article.

[0066] Once the strap end reaches a specific position in the strapping guide channel (machine head), the strap end is clamped and then retracted by the transport rollers 1-MH6.1130 and 2-MH6.1130. The movement direction of the transport rollers 1-MH6.1130 and 2-MH6.1130 is reversed via the forward clutch Y2 and the retraction clutch Y3 (see, Figure 3 and Fig.10 ).

[0067] Figure 3 A transmission gear mechanism 20 is shown, by which the motor transmission motion is transmitted from the common motor to the transmission rollers 1-MH6.1130, 2-MH6.1130. In this mechanism, the forward clutch Y2 and the retraction clutch Y3 can be alternately released and coupled or engaged. In order to transmit the transmission motion from the motor shaft, a toothed belt mechanism including a plurality of gears 1-MH6.1104, 2-MH6.1104, 1-MH6.1127, 2-MH6.1127 is used. The pulleys 1-MH6.1108, 2-MH6.1108 are each assigned to one of the clutches Y2, Y3 (forward and retraction) and are connected to the motor via the belt N4.3212. The toothed belt mechanism transmits the transmission motion from the motor shaft to the transmission shaft or gear shaft 14 connected to one of the transmission rollers 1-MH6.1130, 2-MH6.1130.

[0068] The rotation of the other gear 2-MH6.1104 is transmitted to the first transport roller 1-MH6.1130 through the transmission shaft 14. The first gear 1-MH6.1104 is connected to the other gear 2-MH6.1104.

[0069] When the retraction clutch Y3 is activated, the first transport roller 1-MH6.1130 is driven in the same direction as the motor rotation. At the same time, the forward clutch Y2 is disengaged.

[0070] Conversely, when the forward clutch Y2 is activated, the motor drives the first gear 1-MH6.1104. As the first gear 1-MH6.1104 meshes with the other gear 2-MH6.1104, the other gear rotates in the opposite direction. As a result, the first transport roller 1-MH6.1130 is driven in the opposite direction to the motor rotation. In this case, the clutch Y3 of the first strapping roller is disengaged.

[0071] In other words, when the forward clutch Y2 is engaged, the direction of rotation of the belt N4.3212 is reversed by the gear pair 1-MH6.1104, 2-MH6.1104. As a result, the first transport roller 1-MH6.1130 rotates in the opposite direction to the belt N4.3212. The gear pair MH6.1127 drives the other transport roller 2-MH6.1130 in the opposite direction to the first transport roller 1-MH6.1130. The belt located between the two transport rollers is inserted.

[0072] When the retraction clutch Y3 is engaged, the power transmission is directly transferred from the other pulley 2-MH6.1108 to the first transport roller 1-MH6.1130. The first transport roller 1-MH6.1130 is driven in the same rotation direction as the other pulley 2-MH6.1108 on the retraction clutch Y3, while the other transport roller 2-MH6.1130 moves in the opposite direction. Due to the belt arrangement, the two mentioned pulleys 1-MH6.1108, 2-MH6.1108 have the same rotation direction.

[0073] in short, Figure 3 It is described how the transport rollers 1 -MH6.1130, 2 -MH6.1130, which are driven by the same motor and controlled by the clutches Y2, Y3, can transmit an advancing movement or a retracting movement to the strapping depending on the activation of the clutches Y2, Y3.

[0074] As the strap 12 retracts, the loop of the strap 12 is tightened, and the strap passes out of the strap guide channel 90 and contacts the packaged items. Subsequently, the strap is tightened, wherein tension is applied to the strap by the tensioning unit 30, fasteners are provided to the strap loops by the linking unit 70, and the strap 12 is cut from the supply roll.

[0075] like Figure 7 As shown in more detail, the tensioning unit 30 comprises a motorized tensioning roller P35.1227 that can rotate about a tensioning axis. This function is achieved by using a planetary gear. The purpose of the tensioning roller P35.1227 is to apply the strapping tension to the loop of the strapping 12 by engaging with the loop of the strapping. In order to enhance the engagement between the tensioning roller P35.1227 and the strapping 12, the circumferential surface of the tensioning roller P35.1227 has a profile, in particular a toothing, for example a sawtooth toothing (not shown).

[0076] The tensioning unit 30 is equipped with a sliding clamp 6-MH6.1141. During the tensioning process performed by the tensioning unit 30, a portion of the strapping 12 is placed specifically between the tensioning roller P35.1227 and the sliding clamp 6-MH6.1141, thereby coming into contact with both the tensioning roller P35.1227 and the sliding clamp 6-MH6.1141 (see Figure 5 ).

[0077] In addition, if Figure 7 As shown, the tensioning unit 30 is equipped with a brake mechanism 40 which can be activated to block the rotational movement of the tensioning roller when the power transmission between the motor and the first transmission roller is disengaged.

[0078] The tensioning roller P35.1227 is positioned on the swing arm MH6.1614, which can be pivoted around the axis MH6.0113 of the swing arm in a motorized manner. Through the pivoting movement of the swing arm MH6.1614, the spacing between the tensioning roller P35.1227 and the sliding clamp 6-MH6.1141 can be adjusted to increase or decrease.

[0079] The rings P35.1226 serve to protect the teeth of the tensioning roller when the belt is not inserted. These rings P35.1226 form a minimum gap so that the teeth are prevented from coming into contact with the sliding clamp 6-MH6.1141.

[0080] The strap guides MH6.1451 / MH6.1452 are designed to protect the strap from the teeth of the tensioning roller during feeding / insertion and retraction. These strap guides MH6.1451 / MH6.1452 are lifted in this particular operating state.

[0081] also, Figure 8 A lifting mechanism 50 designed to raise and lower the tensioning roller P35.1227 is shown.

[0082] like Figure 4 As shown, the contact pressure rod 1 is used to press the tensioning roller P35.1227 down onto the strapping 12 and to lift it off the strapping. A compression spring 2 is responsible for the contact force. Another rod 3, which is moved by a cam disc 4, is responsible for the lifting action. The preload distance of the compression spring 2 in its original position (pos.0) is preferably between 69 mm and 73 mm (2.7"-2.87"). On the right side of the tensioning roller P35.1227 there is a pivoting strap guide MH6.1451 and on the left side of the tensioning roller P35.1227 there is a pivoting strap guide MH6.1452. The strapping head 100 therefore comprises a pivoting strap guiding system 60 (see FIG. 1 ) in the area of ​​the tensioning roller P35.1227. Figure 8 ) to protect the strapping belt from the influence of the toothed tensioning roller during the transmission process. The stroke of the rod is set according to the screw-in depth of the articulated joints 7 that are threadedly connected to each other.

[0083] exist Figure 6In the diagram, the transport roller 1-MH6.1130 and the transport roller 2-MH6.1130 are shown as important components in the strapping process. These transport rollers 1-MH6.1130, 2-MH6.1130 are responsible for feeding or retracting the strapping strap 12 at high speed in the strapping strap arch 90. When both rollers are driven, the transport roller 1-MH6.1130 remains fixed in its position, while the transport roller 2-MH6.1130 can rotate. The movement of the transport roller 2-MH6.1130 is connected to the contact pressure rod 1 (see Figure 1) of the tensioning roller P35.1227. Figure 4 ) movement. In order to provide the necessary contact pressure on the strapping 12, a compression spring 2 is used.

[0084] The connecting unit 70 (see Fig. 9 ) is particularly designed to permanently fix the loop of the strapping strap by joining the overlapping strapping strap portions, in particular by a welding process. Thus, the connecting unit 70 provides a closure of the loop. Fig. 9 As shown, the strapping head 100 has a friction welding mechanism with a compensating contact area for uniform force distribution and optimal connection quality. In order to compensate for differences in the overlapping parts of the strapping straps, the connecting unit includes a rocker MH6.1524. The rocker has two degrees of freedom and presses on the welding rod.

[0085] In short, the utility model described provides an effective and reliable method of securely strapping various articles by using a strapping device with a dedicated strapping head. The mechanism of the device ensures that the strapping belt is correctly moved, tensioned and connected, thereby achieving a tightly secured package.

[0086] The proposed improvement to the strapping device's strapping head 100 involves a strapping device having transport rollers 1-MH6.1130, 2-MH6.1130, which are operably connected to each other and driven by the same drive motor, rotate continuously in the same direction and are assigned to a mechanical transmission 20 having a forward clutch Y2 and a retraction clutch Y3, which can be activated alternately to transmit forward movement or retraction movement to the strapping belt.

[0087] Reference numerals list

[0088] 1 Contact pressure lever

[0089] 2 Compression spring

[0090] 3 Another rod (see Figure 4 )

[0091] 4 Cam disc

[0092] 7 Articulated joint

[0093] MH6.1426 strapping guide

[0094] 10 Transmission Unit

[0095] 12 Strapping tape, especially packing tape

[0096] 14 Transmission shafts, especially gear shafts

[0097] 20 Mechanical transmission, in particular gear transmission, such as a transmission gear mechanism intermediate stage with a clutch

[0098] 30 tensioning unit

[0099] 40 Braking mechanism

[0100] 50 Lifting mechanism, especially for lifting the tensioning roller P35.1227

[0101] 60 Strapping strap protection mechanism, in particular pivoting strap guide system

[0102] 70 Joining unit, in particular welding unit, such as friction welding unit

[0103] 80 Adjustable strapping guide

[0104] 90 Strapping guide channel, especially the strapping arch

[0105] 100 strapping machine head

[0106] 200 strapping device

[0107] 210 Supply device of the strapping device 200

[0108] 220 control unit or controller of the strapping device 200

[0109] P35.1227 tension roller or tension wheel

[0110] MH6.1451 Pivoting joint of the pivotable protection element MH6.1452, in particular the pivoting strapping guide on the right side of the tensioning roller P35.1227

[0111] MH6.1452 Pivotable protective element, in particular a claw or grab, for example a ring, such as a pivoting strapping guide on the left side of the tensioning roller P35.1227

[0112] MH6.1614 tensioning roller P35.1227 swing arm

[0113] MH6.0113 swing arm MH6.1614 axis

[0114] MH6.0164 Spring loaded welding clamp

[0115] MH6.0174 cam assembly, especially camshaft

[0116] MH6.1525 Spring loaded welding clamps, especially welding clamps

[0117] 1-MH6.1104 The first gear of the mechanical transmission or gear mechanism 20, in particular the forward clutch gear

[0118] 2-MH6.1104 Another gear of the mechanical transmission or gear mechanism 20, in particular a second gear or a retraction clutch gear

[0119] 1-MH6.1108 first pulley, especially the forward pulley

[0120] 2-MH6.1108 Second pulley, especially the retraction pulley

[0121] 1-MH6.1127 Another gear of the mechanical transmission or gear mechanism 20, in particular a third gear, in particular connected to the first transport roller 1-MH6.1130

[0122] 2-MH6.1127 Another gear of the mechanical transmission or gear mechanism 20, in particular a fourth gear, in particular connected to another transport roller 2-MH6.1130

[0123] 1-MH6.1130 first transport roller

[0124] 2-MH6.1130 Another transport roller

[0125] 6-MH6.1141 Sliding clamp (see Figure 4 and Figure 8 )

[0126] MH6.1451 First strapping guide

[0127] MH6.1452 Another strapping guide

[0128] MH6.1524 Joystick for connecting unit 70

[0129] N4.3212 Belts, especially toothed flat belts

[0130] P35.1226 Ring for protecting the teeth of the tensioning roller

[0131] Y1 Camshaft clutch, especially magnetic camshaft clutch

[0132] Y2 First transfer roller clutch, in particular a forward clutch, for example a feed clutch, such as a magnetic second transfer roller clutch

[0133] Y3 Second transport roller clutch, in particular a retraction clutch, for example a retraction clutch, such as a magnetic first transport roller clutch

[0134] Y4 Tensioning clutch, especially magnetic tensioning clutch

[0135] Y5 Welding clutch, especially magnetic welding clutch

[0136] Y6 Holding tensioning clutch, especially magnetic holding tensioning clutch

[0137] Y8 Camshaft brakes, especially magnetic camshaft brakes.

Claims

1. A strapping head (100) of a strapping device (200), the strapping head strapping one or more objects with a strapping belt (12), the strapping head comprising: a transport unit (10), comprising a first transport roller (1-MH6.1130) and a further transport roller (2-MH6.1130), the transport rollers (1-MH6.1130, 2-MH6.1130) being designed to alternately transmit forward and retracting movements to the strapping (12), - a strapping guide channel (90) designed to guide the strapping (12) during its forward movement so that the strapping forms a loop around the object to be strapped, wherein at least two portions of the strapping overlap each other; a tensioning unit (30) for applying a strapping tension to the loop of the strapping (12), the tensioning unit (30) comprising a tensioning roller (P35.1227) for transmitting a tensioning movement on the strapping (12), and - a connecting unit (70) for connecting overlapping strapping strap portions to permanently fix the loop of the strapping strap (12), Features - the transport rollers (1-MH6.1130, 2-MH6.1130) are operatively connected to each other and driven by the same drive motor, wherein the motors are driven continuously in the same direction, and - The transport roller (1-MH6.1130, 2-MH6.1130) is assigned to a mechanical transmission (20), which comprises a forward clutch (Y2) and a retraction clutch (Y3), wherein the forward clutch (Y2) and the retraction clutch (Y3) are designed to be activated alternately, wherein when the forward clutch (Y2) is activated, the retraction clutch (Y3) is disengaged and the transport roller (1-MH6.1130, 2-MH6.1130) transmits a forward movement to the strapping (12) by being driven in a first direction, and wherein when the retraction clutch (Y3) is activated, the forward clutch (Y2) is disengaged and the transport roller (1-MH6.1130, 2-MH6.1130) transmits a retraction movement to the strapping (12) by being driven in the opposite direction.

2. The strapping head according to claim 1, characterized in that: The tensioning roller (P35.1227) comprises a profile on its circumferential surface, which is designed to improve the engagement of the tensioning roller (P35.1227) on the strapping belt (12).

3. The strapping head according to claim 2, characterized in that: The contours are inclined in the direction of the tensioning movement and engage only in the direction of the tensioning movement.

4. The strapping head according to any one of claims 1 to 3, characterized in that: The first transport roller (1-MH6.1130), the other transport roller (2-MH6.1130) and the tensioning roller (P35.1227) are driven by the same drive motor, and wherein the tensioning roller (P35.1227) is assigned to a tensioning clutch (Y4), through which the power transmission between the motor and the tensioning roller (P35.1227) can be disconnected.

5. The strapping head according to claim 4, characterized in that: At least one braking mechanism (40) is operatively engaged with the tensioning roller (P35.1227) and is designed to prevent rotational movement of the tensioning roller (P35.1227) when power transmission between the motor and the first transmission roller (1-MH6.1130) is disengaged.

6. The strapping head according to any one of claims 1 to 3, characterized in that: At least one lifting mechanism (50) is operably engaged with the tensioning roller (P35.1227) to move the tensioning roller (P35.1227) from a first position to a second position, wherein the tensioning roller (P35.1227) is in contact with the strapping strap (12), and wherein the tensioning roller (P35.1227) is spaced apart from the strapping strap (12) so that the strapping strap (12) can be retracted in a direction opposite to the direction of movement of the strapping strap without contacting the tensioning roller (P35.1227).

7. The strapping head according to any one of claims 1 to 3, characterized in that: The strapping machine head also includes a strapping strap protection mechanism (60), which includes at least one pivotable protection element (MH6.1451; MH6.1452), and the pivotable protection element is capable of pivoting between a pivot position and a swing-out position, wherein, in the pivot position, the protection element (MH6.1451; MH6.1452) surrounds at least a portion of the tensioning roller (P35.1227) facing the strapping strap (12) and protects the strapping strap (12) from contacting the tensioning roller (P35.1227), and in the swing-out position, the protection element (MH6.1451; MH6.1452) releases the portion of the tensioning roller facing the strapping strap (12), thereby allowing the tensioning roller to contact the strapping strap (12).

8. The strapping head according to any one of claims 1 to 3, characterized in that: The joining unit (70) comprises a spring-loaded welding unit (MH6.0164) for evenly distributing the joining force when joining the overlapping strapping strap portions.

9. The strapping head according to any one of claims 1 to 3, characterized in that: The strapping guide channel (90) comprises an adjustable strapping guide mechanism (80) for accommodating different strapping widths.

10. A strapping device for strapping one or more objects with a strapping belt (12), characterized in that: The strapping device comprises a strapping head according to any one of claims 1 to 9, and at least one controller for controlling the strapping head and at least one supply device for storing the strapping band and making it available.

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