DE1761166A1 - Bandaging machine and bandaging process - Google Patents

Description

The invention relates to an automatic taping machine, which makes it possible to automatically wrap a plastic bandage material around an object that To stretch bandage material and to fix the overlapping parts of a bandage with the help of a connection that thereby occurs that the contact surfaces of the overlapping parts fused together by the application of friction will.

It is already known to use bandage material made of plastic for bandaging objects, but it has only recently been proposed to attach or close such a bandage by fusing the overlapping ends of a bandage with one another, with the aid of the Generation of heat between the facing surfaces of the bandage parts, this heat being generated by the frictional forces which are caused by the relative movement of the bandage parts ,

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the bandage parts are compressed with a considerable force will. Various tools are already in use which make it possible to carry out a bandage around an object in the manner described above To close fusing the bandage ends, however, as yet no machine has been available which enables a bandage to be automatically wrapped around a package, the bandage to be tensioned in place, and then the bandage ends to fuse with each other by applying friction, whereby-

^ in which the overlapping parts of the bandage are detected and moved relative to one another without any other outer parts of the machine cooperate with the tensioned drum during the fusing process. It has been shown that a frictional fusion bond produced under such conditions that the only forces acting on the tensioned, overlapping bandage parts are through those Forces are formed, which are applied by the parts used to produce the connection, as a very

"suitable or appropriate connection is to be designated

Another thing about an automatic bandage machine an apparently desirable feature is that it is possible to apply the bandage at a relatively high speed suftufüixren, but at a slower rate Tension the BU, applying a correspondingly greater torque, and doing these work steps only a single motor and drive device is required. The application of this feature is limited

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BATH ORIGINAL

mais not on an automatic taping machine with a Device for fusing bandage ends, but forms it is also an object of the invention.

The machine of the present invention described below is designed to operate at a high speed can be operated, and that it operates at low cost and essentially trouble-free.

The invention thus provides a fully automatic taping machine front, which enables a bandage material with a high velocity M around an object set, whereupon the front end of the bandage is held firmly in place. The rear end of the bandage is then tensioned to tightly wrap the bandage around the object. After this has been done, and after the ends of the bandage have been arranged to overlap, the overlapping parts are firmly compressed and moved relative to each other so that the bandage is closed by the application of friction fusing the bandage ends together will. While this connection is being made, no other parts of the machine are working with the bandage, so the tension previously applied to the bandage is effective during the period of time during which the connection is being made. The presence of tensile stress in the overlapping bandage parts during the fusing process leads to the result that a joint or a closure with better properties is obtained. After the connection point has at least partially solidified, the

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Bandage ends released, causing the full tension loop-shaped bandage acts on the joint. the for creating the fusion connection with the help of frictional forces serving jaws are flat, and they hold the Bandage parts in the same general position that the joint assumes after its completion, after the loop-shaped bandage has been released by the bandaging machine

The transfer of forces through the joint will be greatly improved; this is presumably due to the warm or hot condition of the bandage ends in the area of the connection point during the establishment of the connection, with the bandage material being tensioned, that the bandage ends are more pliable, so that they can plastically deform, with the connection point can expand without cracking. When the junction is finally cooled and solidified, the bandage parts lose their flexibility in the area of the connection point, so that the junction is practically biased. If the connection point is relieved, e.g. by cuts through the loop-shaped bandage, the junction takes on a wavy shape, from which it can be seen that the joint was prestressed. If, according to the invention, a joint is made by fusing with the application of friction, the stress distribution is that exists in the bandage during the fusion process is similar to the stress distribution that is later in the finished loop-shaped bardage is givenj this is na-

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-5- highly desirable, of course.

The method described above is carried out with the aid of a device or machine, the construction of which is seemingly quite complicated, but uses simple mechanical components. Feeding and Tensioning the bandage and making the connection point after the bandage ends have been placed on top of one another and one high pressure is effected by means of a single motor which cooperates with suitable clutches and gears, so that the devices for feeding, The bandage is tensioned and closed one after the other at the right time.

The bandage comes with a high. Speed supplied and wrapped around the object to be bandaged. As soon as this has happened, the motor is reversed so that the bandage is tensioned and forms a loop that tightly encloses the object. After the tensioning of the bandage, the drive connection between the motor and the tension is device is interrupted, after which actuates the motor, the closing device by means of a cam and plate assembly which serves to bring Heibungskräfte to act on the overlapping bandages ends. After the bandage ends have been brought into frictional contact with one another under high pressure, a vibrator contacting one of the bandage ends is actuated to move one end of the bandage relative to the other end so that the overlapping bandage ends are fused together at their contact surfaces. Before merging the overlapping

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The loop-shaped bandage ends up from the supply roll cut with the aid of a suitable cutting device, which is adjacent to the devices for grasping the bandage material is. After the connection has been made, the motor is reversed so that the feed device is actuated with which the next work cycle of the machine is started.

The invention is explained in more detail below with reference to schematic drawings of an exemplary embodiment.

1 is a schematic partial section through a bandaging machine according to the invention and the associated bandage guide, an object to be bandaged that is arranged in the machine is also indicated.

Fig. 2 is a side view, partially broken away the bandaging machine according to the invention.

Fig. 3 is a partially broken away plan view the bandaging device according to FIG. 2.

FIG. 4 is a section taken along line 4-4 in FIG. 2.

FIG. 5 is an enlarged fragmentary section taken along line 5-5 in FIG. 3.

Fig. 6 is a side view of the clutch for tensioning the bandage.

FIG. 7 is an end view of that shown in FIG Clamping coupling

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Fig. 8 is a perspective view of the device for cutting the bandage material.

FIG. 9 is a section taken along line 9-9 in FIG. 4 and shows the device for gripping or clamping the overlapping bandage ends.

Fig. 10 is a perspective view of a carriage and its associated gripping members.

Fig. 11 is a section through an assembly which can capture or release the bandage material.

Fig. 12 is an exploded perspective view of the cam and clutch mechanism by means of whose ends of the bandages are pressed together and the vibrator is driven.

13 shows the coupling mechanism in plan Fig. 12 in the position it assumes shortly before the point in time at which the vibrator is put into action.

Fig. 14 is a perspective view of a cam and the associated vibrator plate.

15 to 19 show the positions of the one after the other different gripping organs, assuming the point in time at which the inner bandage end by a temporary the grasping organ coming into action in contact with the vibrator is held, whereupon various work steps are carried out until the overlapping bandage ends between the vibrator and the main grippers firmly pressed against each other

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the bandage is released from all other holding organs.

As already mentioned, the invention provides a bandaging machine that processes bandage materials made of plastic. An example of a bandage material that could be used is nylon. However, the invention is limited not on this material, because you could also use other plastics, e.g. use polypropylene.

In Fig. 1 can be seen at 10, a motor, by means of which the feed device, the clamping device and the Closing device are driven by suitable, yet to be described drive devices. The feed device and the clamping device are shown in FIG. 3 driven by the motor 10 via a belt 12. The delivery device pulls the bandage material 20 from one Supply roll 21 from so that the bandage material past the transport and tensioning wheels through the closing device and a bandage guide 14 · is guided so that an object 16 to be bandaged which is arranged within the guide 14 is enclosed by the bandage material. The 14-k§cnn tour be formed in any suitable manner; the details of their construction are for understanding the Invention of no importance.

Various details can be seen in FIGS. 2 and 3 the feeding device and the tensioning device, which allow the bandage material to be fed at a high speed feed it and do it at a slower speed

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.to clamp, the clamping device with a large torque works to apply the tension to the bandage, and to carry out these steps only a single motor is required. The feed device described below and the clamping device can process not only bandage material made of plastic, but also bandage material made of metal, and these devices could also be used on machines where the bandages are not closed by fusing their ends. Although the novel feed device and the novel clamping device, which in the invention Bandaging machine used, described below in terms of certain features, as the automatic bandaging machine must be equipped according to the invention with such devices, but it should be noted that the devices mentioned in U.S.A. patent application 612 910, German patent

81c
registration S 113 9 ^ 7 VIIb / are described.

IM to facilitate understanding of the invention the various parts of the automatic taping machine are described in detail in the following, with the device for feeding the bandage material is started.

The feeding device makes it possible to feed the bandage material at a very high speed} this is possible because the bandage material essentially does not meet any obstacles when it comes through from the supply roll, the feed and tensioning wheels, the locking device and the drum guides are moved until the front end of the drum

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material comes back to the deckling with the bandage material ]

By means of suitable drive devices, which are described in more detail below and which can best be seen in FIG. 2, the bandage material 20 drawn off from the supply roll 21 according to FIG runs through a feed wheel 28 which is partially surrounded by a guide 26. The bandage material is placed around the feed wheel 28 with the aid of the guide 26 and pressed against the feed wheel by upper pressure rollers 30; this arrangement provides the initial force required to wrap the bandage material around an object. The pressure rollers 24 and 30 are pretensioned by a tension spring 31 and pressed against the feed wheel 28. The angle within which the feed wheel is wrapped by the bandage material provides the tensile force by means of which the bandage material is drawn off from the supply roll 21. After running off the feed wheel 28, the bandage material enters a guide 32 which is adjacent to the tensioning wheel 34 and partially surrounds it. The resistance that occurs when the front end or the front edge of the bandage material contacts the guide 32, causing the bandage material conforms to the curved guide 32, wherein the bandage material is not pressed against the tensioning wheel. With this arrangement, the tensioning wheel 34 does not interfere with the high-speed feeding movement imparted to the bandage material by the feeding or transporting wheel 28.

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Beyond the tensioning wheel 34, the bandage material moves through an upper guide 38 on a gripping member 40 which, as explained below, has the task of holding the free end of the bandage in place when the bandage has been wrapped around a pack and the bandage is to be tensioned.

A stationary knife 42 is arranged near the gripper 40 and, according to FIG. 8, has an opening 44 through which the free end of the bandage material is passed through. Beyond the knife 42, the bandage material moves under a separator 46 through and to bandage guides 14 which enclose the pack to be bandaged. The separating organ 46 has the task of separating the overlapping bandage parts from one another during the feeding process thus making it easier to feed the bandage. As explained below, the separating element 46 will be used at a later point in time 11 from its position shown there with solid lines into the position indicated with dashed lines pivoted, so that the overlapping bandage parts 20a and 20b placed on top of one another and exposed to considerable pressure when the bandage is to be closed «

After leaving the guide 14, the bandage moves through another guide 48 and the space between the Vibrator 50 and the gripper 40. The vibrator 50 has the task of the fusion connection between the overlapping bandage parts created by the application of friction

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20a and 20b; this is explained in more detail below received. The bandage is applied via the stationary knife 42 and the separating device 46 is guided away until its free end comes to rest against a stop 52. When this happens, the loop created by using that expands of the motor continuously supplied bandage material is formed into a chamber 53, which the tensioning wheel 34 is adjacent, against the action of a rotatably mounted arm 57. If the arm 57 here in a clockwise direction fc is swiveled, it comes into contact with a switch 59 « which is actuated to stop the motor 10. Any subsequent rotary movement of the motor then only leads causes additional bandage material to accumulate in chamber 53. An obvious advantage of this arrangement consists in the fact that the motor is not stopped without bending over which obstacle the drum hits during the Feed processes meets. This construction also prevents bandage material between the tensioning wheel and the transport wheel is held, which could otherwise happen if the engine is not switched off in time. If bandage material were to accumulate in the manner mentioned, the machine would have to be cleared to remove the excess Remove bandage material; of course, it is very desirable to avoid such interference. The switch arm 57 is like this set up that it initially offers a significant resistance to a pivoting movement, but that this Resistance significantly reduced as soon as the pivoting movement begins. The switch 59 can be designed so that he is only actuated when the switch arm has a certain

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. Has carried out swivel movement. After stopping the motor 10, an electromagnet 54 is a suitable electrical circuit switched on} with the aid of a linkage 55, the electromagnet 54 causes the gripper grips part of the front end of the bandage material and presses it against the vibrator 50

The mode of operation of the gripper 40 and the devices assigned to it can best be seen in FIGS. 15 to 19. As already mentioned, the gripper 40 is actuated by the electromagnet 54 or upwards against the bandage end 20a pressed, the electromagnet 54 · the rod 15 moved to the left according to FIG. One bracket 55a and one Spring 55 *> comprehensive linkage 55 acts on a bolt 57a » which is attached to a linkage 57. This linkage is connected to the gripper 40 by a hinge pin 61 tied together. In this arrangement, movement of linkage 55 to the left causes spring 55 *> moves the bolt 57a to the left, whereby the linkage member 57 around his Bearing pin 59 is rotated clockwise · This movement f of the linkage member 57 clockwise causes the Gripper 40 is moved upwards and is brought into contact with the end of the bandage 20a in order to rest against this end of the bandage the vibrator 50 to hold. It should be noted that the bearing pin 59 is attached to a rod 67 which can be reciprocated is, which is shown in FIG. 15 at the initial actuation of the Gripper 40 is held in place in that it is connected to a further gripper 144 by a pin 142a which engages in a cutout 67a of the rod 67.

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When the gripper 144 is moved up in a manner to be explained in order to bring it into contact with the overlapping To bring bandage ends, the rod 67 is moved to the right, around the gripper 40 down from the bandage end 20a take off. The bandage can now be stretched so that it tightly encloses the object to be bandaged.

The drive mechanism for the transport wheel 28 is best in Pig. 3 to be seen · This device comprises a coupling shaft 56, which is driven by the motor 10 via the belt 12 so that it rotates clockwise according to FIG Coupling claws 60 which cooperate with coupling claws or teeth 62 of a clutch pinion 64 when the drum is being fed in. This clutch pinion drives a tensioning gear 66 counterclockwise, the gear 66 driving a slip clutch pinion 68 which is arranged on a shaft 29 to which the transport wheel 28 is connected, which in the present case is driven clockwise. The shaft 29 of the transport or Zuführungsradee is driven by clutch plates 70 so that the transport can be driven at the desired speed · The reasons for the use of the various couplings and pinion from the following description of the elaboration Tashkent rides for eliminating the slack and tensioning the bandage , first of all it should only be noted that it is possible in the devices used according to the invention to use only a single motor, by means of which the working steps for

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Feeding and tensioning of a bandage are carried out,

After the bandage material is wrapped around the object to be "bandaged" at a high speed and the Switch 59 "has been actuated in order to feed further bank

To interrupt dagenmaterials, the motor 10 is reversed with the aid of a suitable electrical circuit, so that In the construction described here according to FIG. 2, it rotates counterclockwise. The coupling shaft 56 now causes the clamping coupling 58 to rotate counterclockwise is rotated, the clutch pinion 64 being the tensioning gear 66 clockwise and the slip clutch pinion 68 drives counterclockwise. The clutch clutch pinion 68 drives the shaft 29 of the feed wheel and thus also the feed wheel 28 counterclockwise, so that the bandage around an object is tightened. According to FIG Pinch rollers 24 and 30 clamped bandage material accordingly the rotation of the transport wheel 28 moves counterclockwise. As already mentioned, the bandage material is 20 Now within the management system 14 withdrawn, so that the bandage is stretched. The bandage is held in its position opposite the pack 16 by the gripper 40, which presses the front end of the bandage against the vibrator 50, to prevent the bandage from being pulled completely out of the guide in the rearward direction, the gripper 40 at the same time serves to absorb the reaction force of the tension of the bandage,

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During the tensioning process, the bandage around the The tensioning wheel 34 has been laid around, but the tensioning wheel is not touched, but slides along the guide 32, causing to lay firmly on the tensioning wheel 34. Bas tension wheel is with the tensioning shaft 36 rotatably connected, but the drive torque is on the tensioning shaft 36 by an overrunning clutch transmitted, which is connected to the tensioning gear 66. There in the embodiment described here, the various devices are designed so that the speed of the transport wheel 28 corresponds to 3.3 times the speed of the tensioning wheel 34, the tensioning wheel 34 and the tensioning shaft 36 overtake the tensioning gear, and these parts are accelerated to the speed of the transport wheel 28. It should be noted again that various devices that can be used in the bandaging machine according to the invention, in the introduction U.S. patent application referred to above.

After the excess bandage material against the Guide 14 has been withdrawn so that the bandage is tightly applied to the object to be bandaged begins to increase the tension in the bandage. With a previously set drum tension, the slip clutch pinion slips 68 through so that the transport wheel 28 comes to a standstill. However, since the tensioning gear 66 is inevitably driven, it continues to rotate so that the tensioning shaft 36 is driven via the overrunning clutch 72. The tension shaft 36 rotates that Tensioning wheel 34 clockwise at a lower speed and a correspondingly higher torque, so that the final tension on the bandage surrounding the Gefentstand

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is applied. When the tension of the bandage increases, it will finally all of the torque required to tighten the bandage through the beveled claws or The teeth 60 of the clutch pinion 64 are transmitted. As a result, a reaction force occurs, which causes the clamping clutch 58, to move along the splines of the clutch shaft 56 so that they are out of engagement with the clutch pinion 64 is coming

The tension adjustment of the clutch pinion 64, by _ the practical tension to be applied to the bandage is determined by the position of a in Fig. 5 shown toggle linkage 74- · By varying the preload of the toggle linkage 74 »which can be adjusted by that the tension of a spring 76 by means of spring adjustment means 78 is varied, it is possible to apply the desired tension to the bandage. In other words, the clutch pinion 64 is brought out of engagement with the clamping clutch 58 when the toggle linkage 74 certain tension has been reached in the bandage. After "the clamping clutch when disengaging along a certain distance has moved, the spring-loaded toggle linkage 7 ^ passes through its extended position, so that the clamping coupling 58 is suddenly brought completely out of engagement with the clutch pinion. At this point the The drive connection between the parts used for feeding and tensioning the drum and the motor 10 is completely interrupted, so that the bandage is no longer stretched

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If the aforementioned drive connection is interrupted, it is of course necessary to provide suitable means to keep the bandage in its tensioned state. Otherwise, after the tensioning clutch 58 has been disengaged, the tension of the bandage has the effect that the direction of rotation of the tensioning wheel is reversed and that the loop-shaped bandage loses its tension. This is avoided by providing an arrangement with sprockets and a chain, by means of which the transport wheel and the tensioning wheel are held in their position in order to prevent the bandage from relaxing. According to Pig, the idler gear shaft 36 cooperates with another overrunning clutch 80 to establish a connection to a sprocket 82, the aim being to rotate the sprocket counterclockwise Sprocket 86 runs, which is also rotated counterclockwise. The chain wheel 86 is non-rotatably connected to the transport wheel shaft 29 and therefore strives to turn the shaft 29 counterclockwise. If the shaft 29 is rotated, the transport wheel 28 thus rotates counterclockwise, the bandage being tensioned so that the shaft 29 is locked, which in turn locks the tensioning shaft 36 via the sprockets and the chain. The tension that prevails in the bandage between the transport wheel and the tensioning wheel, in conjunction with the wrapping of the tensioning wheel by the bandage, is sufficient to hold the bandage so that it does not slip with respect to the two wheels. Thus, the drum is fixed in this state, although the drive motor has been made ineffective.

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After the loop-shaped bandage has been tensioned, the bandaging machine causes the overlapping bandage parts 20a and 20b to be fused or welded to one another by the application of friction. In the embodiment described here, the bandage is closed with the aid of the motor 10, which previously served to feed and tension the bandage and which now works together with various gears, cams, clutches, vibrators and other devices to be described * M

First of all, it should be noted that at this point in time the overlapping bandage parts are merged, while the bandage is only held in place by the pressure between the two main grippers, which press the bandage against the vibrator, since all the other outer grippers have been released. This arrangement leads to the fact that the entire tension of the bandage acts on the joint at the time of the fusion of the bandage ends. It has been found that in this case as compared to other known comparison ä drive a better distribution of stress in all parts of the junction and a higher strength of the joint is achieved.

More precisely, a feature of the invention is that the overlapping bandage parts between horizontally arranged parallel printed pieces are held, wherein the full tension of the drum acts on these drum parts. The drum parts are moved relative to each other,

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around the facing surfaces of the bandage material to heat and to fuse the overlapping bandage parts together. Oa the parts applying pressure The only agents that act on the bandage parts during the fused process are similar to those at that time Distribution of tension in the bandage of those present in the bandage after the bandage has been closed and the bandaged packing removed from the machine has been.

W In the machine described herein, is used in the nylon as a bandage material, the closing device is operated about an oscillation frequency of approximately 4000 vibrations per minute during a period of one second; During this period of time, the mutually facing surfaces of the overlapping band saw ends are melted. After the vibrator has been put out of operation, the ends of the bandage begin to fuse together so that a joint is created.

Generally speaking, the stress distribution at the connection point runs within the overlapping bandage ends from zero at each end of the actual bandage to one Maximum at the opposite end of the junction. The tensions present in the overlapping ends of the bandages thus counteract one another, so that the finished joint assumes a corrugated shape.

With regard to the mechanical details of this part of the taping machine, it should be noted that when the clamping coupling 58 is disengaged after the drum has been finally tensioned by the

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Peder 76 and the toggle linkage 74 was moved along the coupling shaft 56 until the clamping coupling came into engagement with a coupling pinion 88 which is arranged on the coupling shaft 56 and is provided with teeth or Eampen 90. The clutch shaft 56 and the clamping clutch 58, which are still rotating counterclockwise, now contribute to the fact that the clutch pinion 88 is rotated with the aid of the lamps 90. The clutch pinion 88, which drives a reduction gear transmission 92, now rotates a camshaft 94 to which a vibrator cam 96 is connected in a rotationally fixed manner. The vibrator cam ^ 96 comes via suitable mechanisms to effect, to bring the overlapping bandages ends 20a and 20b in contact with each other, to let act to considerable pressure and the bandages ends as n n to move relative to one another to produce a fusion compound.

According to lig. 9 causes the vibrator cam 96 driven by the camshaft 94- first that the overlapping Bandage parts 20a and 20b are pressed against one another. This is done with the aid of a cam roller 106, which is marked with a t

Cam or cam slot 98 cooperates. The cam roller 106 is mounted on a toggle plate 104 which is provided with two slots 112 and 138 through which Toggle links are performed, which in turn serve to move them associated support members 126 and 142, which according to ffig. 10 gripping organs 128 and 144 carry, which are attached to the Attack the underside of the bandage part 20b and apply this bandage part together with the bandage part 20a significant pressure to apply to the underside of the

Vibrators 50 to ^ ri ^ ß | ^ 1 7 / Q 2 1 5 ^{0R |} G'NAL INSPECTED

The toggle links 114 and 116, by means of which the Carriages 126 moved upwards are connected by a hinge pin 108 which is in the upper part of the slot 112 intervenes. The upper link 114 is mounted on a bolt 124 which is inserted into aligned openings' of the carriage or slide 126 is installed. The slide 126 supports a gripper 128, the teeth of which engage the underside of the bandage part 20b.

The right slide 142, which contains a toothed gripper 144, is actuated by a toggle linkage 132, 134 controlled, the linkage links are connected at their adjacent ends by a hinge pin I30. The bolt 130 engages the upper part of the slot 138 of the toggle plate 104. According to FIG. 10, the right sole bar 142 is connected to the rod link 134 by a hinge pin 140. The lower ends of the toggle links 116 and 132 carry bolts 109 and 111, respectively, which fit into the lower Parts of the slots 112 and 138 engage

The slots 112 and 138 are shaped so that during the upward movement of the toggle plate 104 the bolt 108 cooperates with the inclined part 110 of the slot 112, to move the toggle links 114 and 116 on the left side of FIG. 9 inward. During the upward movement of the plate 104, the plate operates with a block 118 together, which is attached to a downwardly projecting plate 46a, which is connected to the separating member 46 according to FIG. From Fig. 11 it can be seen that the toggle plate 104 the

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The separating member is moved so that it no longer works with the overlapping bandage parts so that the slide and the associated gripper can press the overlapping bandage parts on one another. At a somewhat later point in time, the toggle links 132 and 134 move the slide 142 upwards in order to bring the gripper 144 into contact with the overlapping bandage parts to cut the bandage to be closed from the bandage material supplied. Since the h bandage is held in its position by the left slide 126 with the gripper 128, there is no risk that the bandage previously tensioned will loosen again.

The relative movements of the grippers or jaws 128 and 144 during gripping of the bandage and after tensioning of the bandage are best seen in FIGS. 15-19. Starting from FIG. 15, it can be seen that the grippers 128 and 144 do not grasp the bandage ends 20a and 20b, and that the gripper 40 engages the bandage end 20a to remove this J to keep in contact with the vibrator 50. When the toggle plate 104 moves up, the gripper becomes first brought to rest on the bandage end 20b, around this end and the other end 20a according to FIG. 16 between the gripper and clamp the vibrator 50. With the further upward movement the toggle lever plate 104, the other gripper is brought into a position according to FIG 20b cuts through. At this point the gripper is at a standstill

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still in contact with the bandage end 20a. Ss be noted that the upward movement of the gripper 144 has led to that the pin 142a has been disengaged from the rod 67

~ With the further upward movement of the knee lever plate

M-

104 is brought the inclined surface 142b of the toggle plate to bear against the rod 67, so that the rod against the force of the spring 63 is moved to the rightWith this movement of the rod 67, the Iagerbolsem 59 is also moved,

^ so that the rod link 57 with the associated gripper 40 is rotated counterclockwise to release the bandage end 20a. Ba the gripper 40 the bandage end 20a detected, this gripper is prevented from moving together with the rod 67 to the right. The electromagnet 54 has been switched off before this work step, and the counterclockwise actuation of the rod link $ 7 with the gripper 40 is supported by the rotation of the tension spring 69, which connects two bolts 57a and 65 to one another End of the upward stroke of the toggle plate 104- thus have the Grippers 128 and 144 press the overlapping bandage ends against the vibrator 50, and the gripper 40 is shown in FIG. lifted downward from the end of the bandage 20a, or the various parts are now in the position in which they make it possible to fuse the bandage ends 20a and 20b together by applying friction

According to FIG. 2, the stroke length of the toggle lever members 114, 116 and 132, 134 greater than the distance j that the gripper 40 must cover in order to come into contact with the drum

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. The excess stroke length of the toggle link is used to press a Yerankerungsplatte 152 down, wherein the Springs 154 are compressed. Determine the springs 154 hence the amount of pressure applied to the overlapping bandage ends.

When the bandage ends have been completely pressed together by the two grippers 128 and 144, the rotation of the camshaft 94 according to FIG. 3 has brought the step 156 of the vibrator cam into the release position, so that an inner race 158 loaded by springs 160 can be pressed inward . The inner race 158 carries, as shown in FIG. 12, a clutch jaw 162 which is brought into engagement with a clutch jaw 164. The clutch jaw 164 is continuously driven by the motor via a belt 166, so that the clutch jaw 164 is also rotated when the jaw 162 comes into engagement with this jaw. The coupling jaw 162 forms a section of a component, by means of which, according to FIG. 12, a belt 168 is driven in order to rotate a vibrator eccentric 170 according to FIG. % On the Vibratorexzenter 170 is a roller 172 mounted, which engages in a swinging arm 174, by means of which the vibrator 50 rapidly back and forth ·

The pressure applied by the grippers 128 and 144 causes the band members 20a and 20b to be tightly attached to one another are pressed with the bandage part 20a pressed against a toothed surface of the vibrator 50. if the bandage ends have been clamped together under considerable pressure, the vibrating vibrator 50 moves the

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- CO—

outer bandage end 20a opposite the inner bandage end 20b, which is held in firm contact with the end of the bandage 20a by the toothed surfaces of the grippers 128 and 144. Therefore the two contacting surfaces of the bandage ends are moved back and forth quickly relative to one another, with the consequence the resulting friction the required heat to the contacting surfaces is generated, so that the overlapping bandage ends are fused together. It it should be noted again that the bandage is only clamped between the vibrator 50 and the gripper jaws 126, 142. The a prevailing in the loop-shaped bandage is thus effective Tensile stress on the connection point, while this is produced by the above-mentioned fusing. It has shown, that nan receives a stronger connection with this method of operation than with the use of other methods. Also resembles “As already mentioned, the distribution of tension in the bandage during the fusing process, essentially the stress distribution that exists when the loop-shaped bandage has been finally closed

More precisely, results from the inner end of the bandage 20a shows a stress gradient which runs from the value zero at the free end to a maximum at the end of the connection point, the 19 is immediately above the right corner of the gripper 144. In the bandage end 20b, the stress gradient runs from the value zero at the free end and increases to one Maximum at the end of the joint that is immediately above the left end of the gripper 128.

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The cam 96 is designed so that the frictional movement between the two ends of the bandage ceases after a sufficient period of time has elapsed to allow the joint to cool. For this purpose, after a predetermined vibration time has elapsed, during which the overlapping bandage ends have been fused together and the connection point has been created, which, however, has not yet completely solidified, the inner race 158 through the bevel 1 - 6 on the inner Hing 158 and actuated a bevel on vibrator cam 96 to expose the overlapping M bandage ends. In this way the transmission of force between the rings 156 and 158 is interrupted so that the vibrator comes to a standstill. The cam 96 is shaped so that a short period of time now elapses so that the joint can partially solidify. As the cam 96 rotates further, the cam roller 106, which engages in the cam slot 98, is operated so that the toggle lever plate 104 is moved downward in order to pull the grippers 126 and 142 back against the overlapping ends of the bandage.

According to FIG. 3, there is then a section 178 of the vibrator cam 96 into a position in which a cam roller 180 mounted on the vibrator 50 is pivoted inward about an axis 182 can be. During this rotation of the vibrator 50, its toothed gripping surface is lifted from the connection point, see above that the stretched and locked bandage can be resiliently removed from the machine.

209817/0216

1761101

With the further rotation of the vibrator cam 96 causes 14, the ramp surface 184 that the vibrator 50 again is pressed into its starting position · Tuck rotary movement also causes the downward movement of the cam roller 106 to stop so that the toggle plate 104, the linkage 114, 116 and 132, 134 with the associated grippers 138 and 144 and the slides 126 and 142 as well as the separating element 46 are brought into their starting position. As soon as all Devices for closing a bandage are back in your Starting position, a Auslosearat 186 attached to the camshaft actuates a limit switch 188 according to FIG. 2, by means of which the motor 10 is reversed via a suitable electrical circuit

Now the coupling shaft 56 begins the clamping coupling :; rotate clockwise. BIe inclined surfaces of the teeth or claws 90 of the clamping coupling now endeavor that Clutch pinion 88 to drive. The clutch pinion 88 begins to rotate the intermediate gear 190 counterclockwise sn, however, a stop coupling 192 effective in the opposite direction prevents rotation of the intermediate gear wheel 190 counterclockwise so that a rotation of the Clutch pinion 88 is prevented. The teeth or ramps 90 of the clutch pinion then disengage the teeth 90 * of the clamping clutch

After the clamping coupling has moved along a certain distance, the spring-loaded one passes through Toggle linkage 74 its dead center position, so that the clamping coupling 58 quickly and completely out of engagement with the coupling

209817/0215

ORIGINAL INSPECTED

. lungs pinion 88 is brought. The clamping coupling 58 is now moved so that the ramps or teeth 60 of the clutch pinion engage. The machine is now back in their starting position, so that the work cycle for bandaging a new pack can be repeated.

The mode of operation of the machine according to the invention is explained below in context.

The motor 10 is put into operation, and by various cam and gears, the transport and the M Spanηrad be actuated to a bandage supplying first and then to tension. As already mentioned, the bandage material 20 is withdrawn from a supply roll 21, brought into contact with the transport wheel 28 and then guided around the tensioning wheel 34 so that it does not touch the tensioning wheel, beyond which the bandage material tarm 57 upwards on the motor disconnection moved past. The free or front end of the bandage then moves through an upper guide 38, aligned openings of the gripper 40 and the knife 42 adjacent to it, under the separating element 46 in order to then pass the guide 14, within which the one to be bandaged Object is arranged. The bandage material then re-enters a guide 48 (FIG. 2), whereupon it moves past the top of the gripper 40 and under the vibrator 50 until it comes to rest against the stop 52. The further supply of bandage material leads to the fact that the material bulges with respect to the switching arm 57 and into the chamber 53, so that the switching arm 57

209817/02 1 B.

the switch 59 operated to drive the transport wheel Shut down the motor. At this point in time, the gripper 40 is actuated by the electromagnet 54 and the linkage 55, to keep the front end 20a of the bandage in contact with the vibrator 50 so that the bandage does not move during tensioning can loosen. Γ.

Then the motor 10 is reversed with the aid of a suitable electrical circuit, and via various cams and The tensioning wheel is driven to the loop-shaped gears To tighten the bandage. As soon as the desired bandage tension is reached, the toggle linkage 74 moves through its Dead center to the drive connection between the Interrupt the motor and the tensioning device. The unit described, the chain 84 and the sprockets 82 and 86 prevents unwinding of the bandage material after the motor has been disconnected from the tensioner is.

. The engine then comes through various clutches and Gears to act to drive the camshaft 94 to which the cam 96 is connected which in turn causes the overlapping bandage ends are brought under pressure to bear against the vibrator 50, that a bandage of the material supplied is cut, that the vibrator is actuated to the overlapping ends of the bandage with each other to fuse, and that the vibrator is lifted from the bandage so that the bandaged convolution can be removed can. More precisely, the cam 96 moves the toggle plate 104 upwards with the aid of the cam roller 106 in order to move the toggle lever

209817/0215

To operate linkage members 114, 116 and 1J2, 134 so that the slides 126 and 142 with the associated grippers 128 and 144 are brought into abutment against the calibrated overlapping bandage ends 20a and 20b in order to compress them under high pressure To bring contact with the vibrator 50. During this movement the separating member 46, which serves to facilitate the wrapping of the bandage around the pack, pivoted so that it no longer touches the bandage so that the overlapping ends 20a and 20b are brought into hot contact with one another can be. The stationary knife 42 adjacent. ^ The barte slide 142 cooperates with the knife 42 during its upward movement to remove a bandage 20 from that of cut off the supply roll 21 from supplied material. It should be noted that the toggle links are permitted that the slide 126 is brought with the gripper 128 to rest against the overlapping bandage ends before the Slide 142 cooperates with gripper 144 with knife 42, so that loosening of the bandage is prevented

After the overlapping bandage ends through the f Gripper 128 has been brought into contact with the vibrator 50 are, the gripper 40 is released, so that the tension prevailing in the loop-shaped bandage on the overlapping bandage ends acts before the vibrator is actuated to bring the overlapping ends together merge

As soon as the overlapping bandage ends have been brought into contact with the vibrator, the applied . Force through the springs acting on the anchoring plate 152

20Ö817 / 021B

is determined, the cam 96 has rotated to a position in which the clutch pawls 162 and 164 are engaged can come so that the belt 168 is driven, the drives the vibrator eccentric 170. The rotary motion of the vibrator eccentric causes vibrator 50 to vibrate to fuse the ends of the bandage together. After the bandage is closed, the frictional movement between the two ends of the bandage is interrupted, and after a short period of time during which the connecting parts can solidify, the cam roller 180 engages into a cutout 184 of the cam 96 to move the vibrator out of contact with the overlapping ends of the bandage so that the bandaged package can be removed from the machine. Another rotation of the vibrator cam 96 causes the vibrator 50, the toggle plate 104, the toggle lever members 114, 116 and 132, 134, the grippers 128 and 144 and the separating member 46 back to their starting position to return. As soon as this has happened, a release part 186 connected to the camshaft 94 actuates a limit switch 188, by means of which the drive motor is reversed via a suitable electrical circuit · With this reversal of the drive motor passes the toggle linkage 74 his Dead center position in the opposite direction so that the gear and clutch means are returned to such a position be that the work cycle described for feeding and closing a bandage can be repeated.

It should be noted that the various mechanical components described above are merely exemplary embodiments acts. It is obvious that in the

209817/0216

The invention also includes other types of gears,
Clutches, cams and mechanical components could use in place of the parts described.

Finally, it should be noted that in the embodiment described above, a wide variety of other Changes and modifications can be made without departing from the scope of the invention.

Patent claims: 2098 17/0218

Claims (1)

.8 MUNICH ΘΟ SCHWKIGERSTIIASkyi tblbpoh 82 06 Sl I / O I IDO PIOTIOTPATIRT Vt (OIII 092 PATENT CLAIMS 1. Bandaging machine for making a bag around a bag Wrapped around tensioned loop-shaped bandage made of thermoplastic Material, characterized by devices by means of which a bandage material automatically W is supplied, wrapped around a package and tensioned, the overlapping bandage ends lying in a substantially flat surface, furthermore by means of which the overlapping bandage ends are held in place under pressure and without the aid of any external holding means, so that the tensile stress prevailing in the loop-shaped bandage acts on the overlapping bandage ends, as well as by means of a device by means of which one bandage end is opposite the other bandage end | can be moved to swing around the overlapping bandage ends to merge with each other at their facing surfaces. 2. Bandaging machine according to claim 1, characterized by a device (28, 3 ² O) which can be driven with the aid of a motor (10) and which makes it possible to supply the bandage material quickly, to wrap it around the pack to be bandaged and to put it into contact at a lower speed to tension on the pack, so that a high tensile stress is generated in the bandage. 2098 1 7/021 & ORIGINAL INSPECTED 3 · Bandaging machine according to claim 1, characterized by a single one drivable by a motor Device for feeding the bandage material, for tensioning a bandage and for fusing them together overlapping bandage ends, the device comprising mechanisms by means of which the working steps for feeding of the bandage material, for tensioning a bandage and for fusing the bandage ends one after the other will. 4. bandaging machine according to claim 3, characterized by a device by means of which the bandage is kept tensioned when the drive connection between the motor and the tensioning device is interrupted so that the drum ends are moved in an oscillating manner relative to one another can to the overlapping bandage ends with each other to fuse, so that a stretched loop-shaped bandage arises 5 · Bandaging machine according to claim 1, characterized that the device by means of which the overlapping bandage ends come into contact under pressure are held together, horizontally arranged gripper (128, 144 ·) comprises, which are close to each other in the horizontal direction extending vibrator part (50) are arranged, furthermore a device by means of which the bandage material to a bandaging pack can be laid around and held in place while tensioning, as well as a device, by means of which the grippers are held in contact with the overlapping drum ends and the vibrator, and by means of 209817/0215 which the holding device released «can be grounded so that the overlapping bandage ends are exposed to the tension prevailing in the loop-shaped bandage during the fusing process 6 · Bandagiennaschine according to claim 5 t marked "is characterized by a ren near the gripping disposed separating element (46) which facilitates around exposing the bandage to the Fackung and by a Torrichtung by means of which the separating element during the closing movement of the grippers w from its working position is moved out 7. Bandage machine to make a pack surrounding loop-shaped stretched bandage thermoplastic material, characterized by a device for feeding a bandage material β, a device by means of which the bandage material is wrapped around a convolution so that the front end of the bandage material overlaps the rear end of the bandage, a Device by means of which the front end of the bandage is held against the Fackung, a device for Tensioning the bandage around the packing, a device by means of which the overlapping bandage ends are held in contact with each other under bridge, a device for cutting off the rear end of the bandage of the bandage material supplied, a device by means of which the holding device can be released so that the overlapping bandage ends are subjected to tension, a device by means of which the bandage ends be moved relative to each other to the overlapping 209817/0215 . To fuse bandage ends together, as well as through a Device by means of which the bandage ends fused to one another are released, so that the bandaged package can be removed from the taping machine. 8. bandaging machine according to claim 7, characterized in that the device for feeding and Tensioning the bandage material comprises a plurality of drive wheels which are driven by a motor via gears so that it is possible to feed the bandage material at a high speed and wrap it around a pack- ™ and tension the bandage at a low speed, allowing the movement of the bandage material through a large torque is caused. 9. bandaging machine according to claim 7 $ characterized in that the device by means of which the overlapping bandage ends are held in contact with one another under pressure, comprises two adjacent gripper parts, wherein a gripper comprises means for the bandage ^ to guide material so that it can be cut through with the aid of the cutting device, means being provided to to actuate the grippers one after the other, the gripper (144) by means of which a bandage of the supplied bandage material is cut off, is only brought to rest on the drum after the adjacent gripper (128) has gripped the bandage ends to hold them in place and to loosen the bandage surrounding the pack impede. 209817/0215 10. bandaging machine according to claim 9, g e k e η is characterized by a single by a motor, drivable Gear and cam device by means of which the bandage material is fed and tensioned, and by means of which the overlapping bandage ends by the application of friction Fused together to close the bandage ·. 11 · Device for tensioning and closing one by one Object wrapped around a loop-shaped bandage made of thermoplastic Material characterized by ™ a device by means of which the placed around the object Bandage is tensioned so that it forms a tensioned loop-shaped bandage with overlapping ends, a device comprising opposing, substantially flat jaws by means of which the loop-shaped bandage is kept taut by keeping the overlapping bandage ends in contact with one another under pressure, so that a tensile stress on the overlapping bandage parts | acts in such a way that a stress distribution is brought about, which generally corresponds to the stress distribution, which is after the completion of the loop-shaped Bandage in this adjusts, as well as by a device that can be operated while the overlapping Bandage parts are kept in contact with each other under pressure to prevent helative movements between the overlapping ones To bring about bandage parts so that the overlapping bandage parts fused and connected to one another or to be united 209817/0215 12. Device according to claim 11, characterized in that the device by means of which the overlapping bandage parts are kept in contact with one another under pressure comprises a vibrator part (50) and two flat jaws which can be brought into contact with the overlapping bandage parts to press the drum against the vibrator part, in order to maintain frictional contact between the drum parts, as well as motion by a device by means of which the vibrator part opposite the flat jaws can be moved to a relative a bring about between the overlapping bandage parts, so that they to be fused and united with one another. 15 · Device according to claim 12, characterized in that each of the flat jaw parts has one Slide (126, 142) and a toothed gripper part (128, 144), wherein each gripper part is firmly connected to the associated slide. 14. Device according to claim 12, marked ^ net by a device by means of which the grippers one after the other in contact with the bandage and the neighboring one Vibrator part are brought, and by means of which the bandage is cut from the supplied bandage material, wherein the device comprises a cutting member or knife (42) which is adjacent to that gripper which is the last in Is brought into contact with the overlapping bandage parts. 2098Ί7 / 021 & 15. Device according to claim 14, characterized in that the device by means of which the Grippers are moved one after the other, comprise a toggle plate unit, furthermore toggle links connected to the grippers and motor driven cam means operable with the toggle plate and toggle links are connected. 16. Process by which an object with a it can be provided enclosing bandage, thereby - characterized in that a portion of a thermoplastic Bandage material is formed into a loop surrounding the object, so that parts of the bandage material overlap, and that tension is maintained in the overlapping bandage parts in such a sense is that there is a stress distribution which generally corresponds to that which is after the closing of the loop-shaped bandage adjusts in this, while the overlapping bandage parts fused together and then solidified to unite the overlapping bandage parts. 17 · The method according to claim 16, characterized in that the bandage material with a high Speed is applied and wrapped around the object, and that at a slower speed using an increased torque, a tensile stress is applied to the bandage material in order to tension it. 209817/0215 • 18th Method according to claim 16, characterized in that the overlapping bandage parts detected in a horizontal plane with the help of grippers so that the overlapping bandage parts are fused together in the plane in which the bandage material is located when the connection between the overlapping drum parts is made. 19. The method according to claim 1? » characterized in that the front end of the bandage is held firmly in place after the bandage material has been wrapped around the object, that the overlapping bandage parts are held in the position in which they are to be fused together by means of grippers, that the rear end of the bandage is cut from the supplied bandage material, and that the front end of the bandage is then released so that the full tension in the looped bandage acts on the overlapping bandage parts when the bandage ends are connected by being fused together . Ä 20. Method of making a pack with an encasing the pack To provide bandage, characterized in that the front end of the bandage material is wrapped around a package in such a way that it forms a loop with parts of the bandage material further back forms that the front end of the bandage relative to the pack is held firmly in its position that the bandage is tensioned is that the overlapping bandage parts are grasped by grippers that then the front end of the bandage is released that the bandage from the supplied bandage 209817/0215 Il material is cut off, and that the overlapping Band assembly parts are made to vibrate relative to one another in order to make them with the help of the applied friction with one another to merge. 21 · The method according to claim 20, characterized in that the bandage material with a high Speed is supplied that the supply of bandage material is interrupted and the feed movement is reversed is to tension the bandage at a low speed and that the bandage after the completion of the tensioning process closed to keep them in place. 22. Device by means of which the overlapping ends a bandage can be detected and held, characterized by two horizontally arranged Gripper parts and a vibrator part, a device by means of which the gripper parts one after the other to rest on the drum and the vibrator part, as well as by a device, by means of which the vibrator can be moved relative to the grippers in order to cause the overlapping ones Bandage parts are fused together. 23 · Device according to claim 22, characterized in that each gripper part has a slide and includes a toothed component firmly connected to the slide. 24. The device according to claim 22, characterized in that the device by means of which the Gripper to rest on the overlapping drum ends 209817/0215 can be brought, comprises a toggle lever part, further quay lever members firmly connected to the grippers and cam means, in order to move the toggle lever part and the toggle lever members so that the bandage ends are under pressure between the grippers and the vibrator part. 25 · Device according to claim 22, characterized by a device by means of which the pressure of the Gripper can be adjusted, as well as by a cutting element or knife, which is arranged near one of the grippers and ~ cooperates with him to cut a bandage from a supplied bandage material. 209817/0215 Lee rs e i t