DE2060841A1 - Clamping and locking device for a synthetic tape placed around a package or the like - Google Patents

Description

DtPL.-lNG. KLAUS SEHN
DIPU-PHYS. ROBERT MUNZHUBER 2 U 6 0 OA

FATE NATIONAL LAWYERS

8 MUNICH 22 Wl DEN M AYERSTHAS SE 5 TEL. (O811) 22 283O-295182

December 10, 1970

Our reference: A 44670

A 44770 Pp-Sc-P

Company N ₀ V. IiETAVERPA, Maartensdijk, Holland

13 j Indus trieweg

Tensioning and closing device for a synthetic tape wrapped around a package or the like

The invention relates to a device for a synthetic tape placed around a package, consisting of clamping elements for holding the front end of the tape, of a device for tensioning the tape around the package, from a locking mechanism that connects the overlapping tape parts together, from a cutting device, which cuts the tape loop from the supply, and from devices, by means of which the tension in the band before the complete

109825/1433

"U" Merck, Flnck λ Co., Munich, No. 2β 4β * I Bankhaus H. Aufhauaer, Munich, No. 2 (51300 Po "t" ohecki Munich aoo

Telegram address 1 patent senlor

20 ο '

Severing of the tape is canceled by the cutting device. A device of this type is off known from British patent specification 1,033,526 »This known device consists of a simple hand-operated apparatus, which is a solution to the problem seeks to find that when the synthetic tape is under tension and being cut, it is this Tape showed wear due to molecular orientation

The result of such wear and tear is belt ends which are difficult to treat. With this known arrangement proposes a solution to this problem of releasing the tension in the belt even before the cutting of the tape has been carried out and / or completed, this is done with the hand-held knife unlocks the device that has stretched the tape during the wrapping. Even with Such a mechanism does not work quickly enough and, moreover, always will There are still frayed ends of the belt due to wear and tear. For an automatically working machine But this is absolutely useless, as is a suitable one

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Guiding the front end of the tape through the guide frame is no longer possible and the common Ειιά clamp on such an automatic machine can no longer hold the tape end properly, "

The object of the invention is to provide an improvement

to find for it, and this object is achieved according to the invention I in that a tape guide frame in the device is provided with a guide passage in which a tape can be guided along a loop path, wherein this path is adjacent to an end terminal, and that before the beginning of the loop part of the path and behind the facilities the insertion, retraction and tensioning of the tape is provided with a hold-down clamp which holds the tape under tension, and that the locking mechanism is already in front of the end clamp, where the tape parts each have the J Form overlapping loops, is arranged, these from one part, which is forward and backward Moved in the horizontal direction, there is, this part adjoining the guide passage in one position and in the other position cooperates with a locking block which can be moved up and down and a cutting element carries, and with the parts of this element through

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Switches and the like can be regulated in such a way that after the closure of the closure, the closure block is again moved downwards, releases the media retention clamp and, after the locking block has returned to its starting position is, the horizontally movable part returns to the position in which the guide passage has been connected, the cutting taking place during this movement process.

In this way, a sufficient period of time for the expansion of the band is achieved in order to achieve the result come that tape itself off the hold down clamp loosens and stretches and thereby also the certainty gained, that the cut off front end The belt never shows signs of wear, which could prevent further transport.

According to the invention, it is additionally advantageous to plane the cutting element of the sonic arrangement of the tape to give a vertical cut and to lay this cut in the direction of the plane of the tape, so that the Cut is carried out on the narrow side of the tape, thus creating a fixed arrangement of the cutting device

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This can also be achieved with a Knives with a sheared cutting edge happen, which consequently pushes the fibers away to the side.

The device of the locking mechanism in a horizontally and vertically movable part enables one simple arrangement, which allows easy expansion. e.g. for cleaning purposes or replacing the knife. to for this purpose, according to the invention, the frame of the device has immediately below the lower part of the tape guide frame a right-angled guide passage which is arranged transversely to this tape guide frame and which is open at the top, a right-angled hollow block being arranged in this passage vertical side walls and end walls and the top can be removed and this block in the guide passage a limited forward and backward stroke with I.

has two end positions and within this block the vertically movable closure bloom is guided, with this block has at one end a cover plate with two guide slots for the tape, these slots are open on one side and directly above one another are arranged, and in one place of the blook in the

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206U841

Extension of the guide slots of the tape guide frame lie, and at the other end a cover plate is provided, the underside of which has a profile part, which with cooperate with the breech block for closing a breech which has been brought into this block can and which is equipped on both sides by sliding parts on the upper edges of the block, these sliding parts being guided into the passage, being open at the top and having guide slots at the location of the cover plate have to be held by means of each against a stop in the direction of the first cover plate and with the first cover plate via a cross bolt in a transverse slot which is open at the top, this first Cover plate and with slots, which are less deep in these parts, are connected, this cross pin cooperates with the rising side surfaces on the upper edge of the passage sidewalls so that he can move there after a certain movement of the block unlocked by the parts, namely in that the cross pin emerges from the less deep slots of these parts, these parts being one Have release slot, which is open at the top, is immediately in front of the second cover plate and one these parts with a cutting knife at the point of this

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Release slot is equipped by this cutting knife is arranged only at the level of the lowest guide slot for the tape.

This arrangement makes it possible, after lifting the workbench tops on which the packages are to be wrapped lie to lift these parts upwards out of the guide passage.

In the drawing is an embodiment of the invention for example, show:

fig. 1 is a perspective view of the parts of a device which, according to the invention, directly lie under a work table (not shown) * The drawing is a Schematic representation and parts that are not important or generally known are are omitted?

Fig. 2 is a partial drawing of the mechanism of Fig. 1, seen at an angle from above}

5 shows a cross section through the plane of the guide frame j

Fig. 4a, b and c separate partial drawings from Fig. 2?

Fig. 5

u. 6 two different working positions of the in

Fig. 2, 3 and 4 shown mechanism j

Fig. 7 is a schematic representation of the entire pneumatic device!

Fig. 8 the schematic representation of the associated '"' rigen electrical arrangement.

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Fig. 1 shows a wire guide rail 1 in which only part of the horizontal side and part of the vertical side is shown. In reality this is of course a closed rectangle. The tape guide 2 is mounted in the horizontal and vertical part of the guide frame 1, this guide being able to slide transversely on the plane of this frame and being pushed out of the position shown in the drawing by pneumatic cylinders (not shown) can be and wherein a tape leading, U-shaped passage 3 is provided in this guide. The guide elements 2a, which are shown in the lower right part of FIG. 1, cover an upper guide slot 3a, while an additional guide slot 4 located below can be taken into account right side of this slot is in the frame of the apparatus. The tape pull-off elements and tensioning elements can also be attached here.

A movable clamping block 5 and a fixed part 6 are mounted on the path of the belt, the belt can be clamped between these parts to get a tensioned belt. The movable clamping block 5 can by means of an eccentric 7 on an axis 8 via egg

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nen lever 9, which is connected to the cylinder 164, can be operated.

The frame of the assembly has approximately halfway under the work table and across the plane of the Tape guide frame 1 a Mhrung passage 14, which is open at the top and is formed by two vertical plates 10 and 11 with the horizontal lines "

sts 12 and 13.

A block, which is denoted in its entirety by the reference number 15, lies slidably in the guide passage 14 and can be moved forwards and backwards by means of a cylinder (not shown), wherein but this cylinder is connected to the component with the reference number 16. Numeral 17 shows a Cross plate, which is provided as a stop. The block 15 is shown in detail in Fig. 2 and in Jig. 4a, b and c shown. This block consists of a main body 18 and two side pieces 19 and 20 which are shown in FIG right-angled lugs on the upper edges of the main body 18 (Mg. 3) are arranged.

The closure sheet 21 is guided inside the block 15 and can by means of the cylinder 137, which

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is hinged to this block by the rod 22, can be moved up and down. The block 15 has two cover plates 23 and 24 on the upper side. The cover plate 23 is formed with slots 25 and 26 as shown in Fig. 4b, this plate being the guide passage can bridge for the band at the point where the interruption through the passage 14 is formed. This cover plate is also provided with a vertical transverse slot 27 which is open at the top.

The cover plate 24 is formed on the underside in the manner provided with the reference numeral 28, see above that this plate cooperates with the tooth head of the locking block 21 and is able to already To fold a U-shaped pre-formed fastener over the tape, notches being provided on this fastener to hold the pieces of tape in place.

On the right-hand side of FIG. 3, the part is slidably mounted in block 15. This part will be 20 held by a spring 30 against the stop 17, is formed with a recess 31 and is for a common Movement by means of a cross pin 32

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ORIGINAL INSPECTED

closed, which in the recess 27 of the cover plate 23 and acts in the slot 31 and thereby the part 20 connects to block 15. The part 20 has a knife 33, the vertical cutting edge of which is only in the plane of the slot 34 acts.

The side walls 10 and 11 have rising Side surfaces 35, which at the same time cooperate with the cross pin. If the block 15 is total after moved to the right, the part 20 is approached with the knife 33 until the part 20 by the pin 32, which meets the rising side surface 35, is released and this part is then withdrawn by the spring 30 will. However, the tape passing through the slot 34 is then cut and through the opening 36 has been released.

The part 19 is mounted on the left upper edge in a right-angled recess of the block 15. The clamping block 37 is located with the end bracket 38 on the side part 19, said end bracket cooperating with the cylinder 212, which on the plate .. .1.0 befe-

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ο This end tensioning block 37 has a slot 39, in which the end of the tape can stick, as well as in a slot 14, which the cross connection to the Forms slot 4 ·. The block 37 can run against the part 19, since it is connected to this part by means of screws 41 is. This is necessary to remove the tape from the slot and 40 and the bracket 38 after the closure is closed to release »

Fig. 5 shows the end position of the block 15, in which the closure can be closed. This position is also shown in FIG.

Fig. 6 shows the other end positions in which the parts 19 and 20 are unlocked and in which the plate 23 with its guide slots in line with the tape guide slots on the guide frame. When the block moves back from this latter position, the cross pin 32 becomes automatic return into slots 31 and 42 of parts 20 and 19. The slot 42 in part 19 is a little longer, so that when the block 15 is moved the end clamp will move a little later than the knife 33. This is necessary

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_ ₁₃ _ 2060341

so that there are no other lateral forces on the belt during of the sunshine process.

According to the invention, the control of the holding clamp 5 »of the block 15» of the locking block 21 and the end clamp 58 takes place in a specific sequence. In this order, the terminal 38 is at the end of loading a destiny with the band closed. In response to a series of signals, the lead frame has been opened, the tape withdrawn, wrapped around and then around the package. Package has been tensioned and the bracket 5 moves to maintain the tension which has been created in the band during the sealing process.

During this operation, the block 15 is in the position shown in Fig. 6, after which the block is in the position shown in fig. 1 or 5 is moved »The Versohließblook 21, which is provided with a closure, then moves upwards and the closure encloses the overlapping tape and as soon as a suitable measuring device gives the signal that the closure is complete, the closure block moves 21 down again.

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Read signal that the lock blocks are moving downwards leaves, is also used for releasing the bracket 5 and only when the locking block is in its starting position has returned, a signal is given, on the basis of which the block 15 is again in the starting position (shown in Fig. 6) is moved »The tape which in the meantime has become slack, i.e. slack in the Part to be cut off and which leads to the supply is now cut off by means of the knife 33 and the belt loop obtained can now run through the release opening 36, 43. When this is done, the Parts 19 and 20 released so that these parts move backwards while the block 15 moves into the positions shown in FIG position shown moves, in which the guide slots 3 and 4 closed in the lowest part of the guide frame 1 and the tape can be reinserted.

With the arrangement according to the invention, the band will have enough time to be relaxed, which in a automatic device according to the application takes a certain amount of time, albeit a very long time is short.

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In the following description, the operation of a device according to the invention will be based on FIG Figures 7 and 8 clarified. It should be noted that a number of parts of the machine are not shown, since these are known from many publications and are not required for an understanding of the invention «,

The connection diagrams of Mg. 7 and 8 are described below, with Pig. 7 the diagram of pneumatic operations and pig. 8 represent the electrical diagram.

In Fig. 7, the compressed air comes in a Air compression source (not shown) through a supply tube 100 and enters the main supply tube 104 by passing through a filter 101, through a pressure regulator 102 and through a lubrication element 103 below

a pressure of approximately 6.3 kg / cm. A pressure switch 105 is connected to the connecting pipe by means of a Branch pipe 106 connected, this connecting pipe between the pressure regulator 102 and the lubrication element 103 lies. The advantage of this pressure switch 105 will be seen later.

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The compressed air can now be on the side of the piston rod (hereinafter referred to as "rod side" for short) of a cylinder 117, through a pipe 110 which branches off from the pipe 104, through a pressure regulator 111 and by an electromagnetically operating valve 113, this cylinder being the return of the re-clamping device serves. The electromagnetically operating valve 113 is made in such a way that when the Solenoid 114 is traversed by the current that is compressed Air acts on the rod side of the cylinder 117, while, .when the solenoid 114 is de-energized, the valve 113 is held in a position by a ring 115, in which the rod side of the cylinder 117 is in communication stands with the atmosphere.

fe The side opposite the rod side, im

hereinafter referred to as bottom side for short, in cylinder 117 is connected to the main supply pipe 104 by means of a pipe 124, an electromagnetically operating valve 121 and connected to a pipe 120. This valve is designed such that when the solenoid 122 is energized stands, the compressed air can act on the bottom side of the cylinder 117, while when the magnet coil

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122 is not energized, the valve 121 by the spring

123 is held in a position in which the bottom side of the cylinder 117 is in communication with the atmosphere standsο

The main supply pipe 104 can be connected to the bottom of a cylinder 135 by means of the branch 130, a pneumatically operated valve 131 and a pipe 134, this cylinder regulating the feeding of the fastener tape. The valve 131 is designed in such a way that, when the pressure in the control port 133 is higher than that in the control port 132, the bottom side of the cylinder 135 is connected to the main supply pipe 104, while in the other 3? All the bottom side with the atmosphere in Connection is _o In this jail, the tube 130 is connected to a tube 136 which leads into the bottom of a cylinder 137, this cylinder controlling the closing template of the closure. The bottom side of the cylinder 137 is in the other position of the valve 131 (the pressure in the control port 133 is higher than the pressure in the control port 132) in communication with the atmosphere.

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The main supply pipe 104 can be connected to the bottom side of the cylinder 155 by means of the branch pipe 150, a pneumatically operating valve 151 and a Tube 154 be connected - this cylinder 155 den Closing block controls. ! This connection is established when the air pressure in the control opening 152 of the valve 151 is higher than that in the control port 153. At this time, the rod side of the cylinder 155 is in communication with the atmosphere via the pipe 160 and the valve 151. The pipe 160 has two branch pipes 163 and 161, which with the rod side of a cylinder 164 which the Central clamp controls or are connected to the rod side of a cylinder 162, this cylinder 162 the fastener tape sonic mechanism and the molding mechanism controls. Likewise, the pipe 154 is provided with two branch pipes 156 and 159; the branch pipe 156 is connected to the rod side of the cylinder 135 by means of an AC relay 157 and a tube 158, the cylinder 135 regulating the pricing of the fastener tape. When the air pressure in the control port

153 is higher than in the control opening 152, the pipe will

154 to be in communication with the atmosphere and the pipe 160 is connected to the main supply roller 104 be and vice versa. The air pressure L ti of the S

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BATH

153 is through a sequence valve 166 and a pipe 165 regulated, which represents a branch pipe of the pipe 124 «.

The branch pipe 159 can be controlled by hand with the control opening 145 of the valve 146 Valve 141 connected. The valve 141 is designed in such a way that when no manual control is carried out the spring 143 holds the valve in a position in which the tube 159 is not connected to the control port 145 is, in which case this opening is connected to the atmosphere. When the valve 141 is switched by hand Then the tube 159 is connected to the control port 145 and the spring 143 becomes the valve automatically return to its starting position when the manual control stops. The valve 141 serves as Return device ο

A pipe 180 leading from the main supply pipe 104 branches off, can by means of a pneumatically operating valve 181 either with a pipe 184 or a pipe 191 are in communication, the pipe 191 making the connection to the atmosphere when the pipe 184 with the pipe

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180 communicates and reverses. The tube 184 is connected to the bottom side of the cylinder 162 by means of a branch pipe 190. The tube 184 can also with the bottom side of a cylinder 189 by means of a mechanically operating valve 185 and a pipe 188, this cylinder controlling the feeding of the preformed closures. The mechanical one The operation of the valve 185 takes place by means of the cutter lever of the fastener tape, i.e. in a way that when this lever is in its highest position, the tube 184 with the bottom of the cylinder 189 is connected, while in the other case the spring 187 presses the valve 185 into a position in which the bottom of the cylinder 189 communicates with the atmosphere.

The tube 191 is with the bottom sides of a number connected by cylinders 192, which are available for opening the tape guide frame. From these bottom sides a branch 193 goes off, which is connected to the bottom of a cylinder 199 by means of an AC relay and a pipe 198 is connected, this cylinder

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controlled the return pawl of the belt. A compression spring 200 is provided on the rod side of this cylinder 199 between the piston and cylinder. Two pipes 194 and 195 branched from the pipe 193, and are connected to the rod side of cylinder 189 and with the bottom side of the cylinder 196, the cylinder controls the returning low band reserved role ₀

The control opening 182 of the valve 181 can be connected to the main supply pipe 104 by means of a pipe 174, an electromagnetic valve 171 and a pipe 170 may be connected. The valve 171 is such designed that when the solenoid 172 dea valve 171 is not energized, the valve 171 held in one position by a spring 173 in which the pipe 174 communicates with the atmosphere, and in the other jail the pipe 170 with the | Pipe 174 is connected *

Last is the main supply tube 104 with a Pipe 210 connected by means of a valve 146, the aes Pipe 210 in the control opening 133 dea pneumatically working Ventilea 131 opens. A pipe 213 branches off from it

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^'22 " 20G0841

Tube 210 and is with the atmosphere via an electromagnetic working valve 214, a pipe 217, an orifice throttle 219 and an outlet 4-4 connected to these Outlet 44 is located in the curve of the tape guide frame, as it is in the 'Dutch patent specification 681 5438 is described. A branch pipe 218 is attached between the opening throttle 219 and the outlet 44, this branch pipe 218 being connected to the control port of the valve 146. The tube 221 is with the Control opening 183 of the pneumatically operating valve 181 is connected by means of a pipe section 220 and is connected to the bottom side of a cylinder 223 connected by means of the tube 222, this cylinder 223 being the hold-down roller of the Belt feed controls. The electromagnetically operating valve 214 is designed such that when the electromagnet 215 is energized, the pipe 217 is connected to the pipe 213, while when this electromagnet 215 is not energized, the spring 216 brings the valve 214 to a position in which the tube 217 is exposed to atmosphere communicates.

The pipe 210 is in communication with the bottom side of the cylinder 212 via a branch pipe 211, wherein

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109825 / U33

this cylinder 212 controls the end clamp ”, Another Tube 229, which branches off from tube 210, connects tube 210 to the rod side of cylinder 196 The pipe 210 is additionally connected to the bottom side of the cylinder 164 via the pipe section 230 and this tube 210 is also 'with the rod side of the Cylinder 137 connected via the pipe section 230 and 231. Finally, the tube 210 can be connected to the control opening 152 of the | pneumatically operating valve 151 by means of the pipe 224, the mechanical operating valve 225 and the pipe 228 connected. The operation of the valve 225 caused by the component 226 takes place by means of the Locking lever, i.e. such that in the lowest position of this locking lever the tube 224 with the Tube 228 is connected and that when the locking lever moves from its lowest position the spring 227 brings the valve into a position in which the tube 228 is in communication with the atmosphere comes.

The main supply pipe 104 can also be connected to the pipe 232 by means of the pneumatically operated valve get connected. This tube 232 is on the rod side

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of the cylinder 212 by means of a tube 233, with the rod side of the cylinder 223 by means of the tube 234, with the bottom side of the cylinder 199 by means of the pipe

235 and the AC relay 197, with the rod side of the cylinder 135 by means of the tube 237, 238 and the AC relay 157, and likewise with the pressure switch

236 and can be connected to the control opening 132 of the pneumatically operating valve 131 by means of the pipe 237, the mechanically operating valve 239 and the Tube 242 be connected.

The valve 239 is controlled by the part provided with the reference number 240 by means of the closing block, i.e. in such a way that in a forward position of this sealing block the tube 237 with the Tube 242 is connected and in the starting position of the closing block, the spring 241 acts in such a way that the valve 239 assumes a position in which the tube 242 is brought into communication with the atmosphere.

Figure 8 shows the electrical diagram of the device A three-phase electric motor 250 is connected to the supply by means of the main switch 252, the fuses 253 and the Relay contacts 254a connected

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The electrical parts that make up the machine in connection with the pneumatic elements that are in Figure 3 is shown, and with the mechanical devices, controls, are via a transformer 255 its primary coil on two of the three supply phases of the electric motor 250 is connected ο

The secondary winding of transformer 255 is'

connected to the two voltage terminals 256 and 257. The electrical circuit between these binding posts 256 and 257 can be via fuse 258 and a number of them connected circuits -be closed.

The first circuit consists of a pressure switch 261, a conductor 262 and a control lamp 263 which only lights up when the air pressure has dropped below a certain value. The second circuit consists of a pressure switch 266, a line 267 and a control lamp 268, which indicates that the air pressure is sufficient. The switches 261 and 266 are mechanically linked such that one switch is closed while the other is open and vice versa. These switches 261 and 266 are controlled by the push button switch 105 (Figure 3).

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The third circuit consists of the pressure switch 266, the locking block switch 270, the switch of the Closing tape store 271, the safety switch 272, the pressure switch 273 and the solenoid 215 of the valve 214.

The fourth circle consists of switches 266, 270, 271, 272, 273, as well as the wire guide switch 274, the relay contact 275, the electromagnet of the timing relay 276, this last coil connected in parallel is to the timing relay contact 276a and the coil 254 of the motor relay. This last circle is closed while the tape is being fed in »During the return of the tape, the circle is drawn through 266, 270, 271, 272, 277, 278, 275b, formed by the timing relay contact 276a and the motor relay 254. The coil of relay 275 is parallel to 275b, 276a and 254. During the re-tensioning process, the circle 270, 271, 272, 277, 278 and 284 is closed, just like the electromagnet 122 of the valve 121.

At the beginning of the wrapping process, the circle consists of 266, 270, 271, 272, 277, 288, the start switch 286, of the electromagnet I72 of the / entile 17I »

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An electromagnetic counter 289 is in parallel with the coil 172 switched.

The last circuit contains the switches 266 and 290 and also the solenoid 114 of the valve 113 and is used to retrieve the re-tensioning device

The diagrams of Figures 7 and 8 show the valves, cylinders and switches in the position which is in the Phase of feeding the tape is taken, while for this purpose the cutting of a closure from the closure tape supply, the U-shaped bending of this fastener and the introduction of this fastener into the breech block has already taken place.

As soon as the tape is stuck in the end clamp 58 and the air outflow opening 44 in one of the curvatures of the f Tape guide frame 1 is closed, the air pressure in the lowest control opening 147 of the valve 146 will increase, whereby this valve is switched. In this reversal, the rod side of cylinder 212 is turned on the supply pressure line .104 is connected, whereby the end clamp 38 is closed »at the same time occurs Compressed air in the cylinder 223 'so that the tape feed

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is stopped and the rod side of the cylinder 137 is vented, this cylinder at the closing bloom is connected, while plus the bottom side of the cylinder 164 of the hold-down clamp 5 is ventilated the rod side of the cylinder 196 controls the tape retrieval device, as does the upper one Control openings 183 of the valve 181, 152 of the valve 151 and 133 of valve 131 · In addition, air is supplied to a cylinder 199, which is here designated with a Cooperating tape return pawl, i.e. a pawl mounted near the supply roll is, but not shown, this pawl ensures that during retraction and re-tensioning of the tape, this tape cannot return and may form loose loops on the supply roll. In addition, air is sent into the pressure switch 236, whereby the belt conveyor motor is de-energized.

In order to achieve a winding, the switch 286 (Figure 8) is closed, whereby the electromagnet 172 is excited by means of the closed switches 270, 271 »272, 277, and 288, whereby the valve 171 toggles and the control air is applied to the lowest control opening 182 of the valve 181, whereupon this valve switches over.

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The consequence of this reversal is that compressed air the Cylinder 192 is supplied by tube 191 where the tape guide frame is 1 is opened. In addition, compressed air enters the rod side of cylinder 189, which cylinder provides that a tongue is withdrawn by means through which the cut closure was fed. Furthermore, the cylinder 162 of the fastener tape cutting device is ventilated on the underside and compressed air | enters the bottom of cylinder 196 to get the retractor that pulls the tape off. By opening the tape guide frame 1, the switches 274 and 278 are also switched over, whereupon the tape conveyor motor by means of switches 270, 271, 272 and the now closed Contacts of 277, 278 and 275 (275b closed, 275a open) is put back into operation.

The tape is now placed around the package until a certain point Initial voltage is reached and the switch 284 switches because of the tension in the belt, whereupon switch 290 is opened and the coil 114 is energized drops, whereby the rod side of the re-tensioning cylinder 117 is ventilated. When closing the so holder 284, the coil 122 is energized, whereby the valve 121 supplies the bottom of the cylinder 117 with compressed air, whereupon the re-voltage prevention is put into operation.

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As soon as the air pressure in cylinder 117 reaches a value which is greater than the setpoint value of the sequence valve 166, this valve lets air into the lowest control opening 153 of the valve 151 »This valve will switched over, whereby the locking block 15, which is connected to the cylinder 155, is brought forward, in order to bring the closure under the tensioned band »At the same time the bracket 5 closes because compressed air enters the cylinder 164 is stepped, so that the tension on the belt is maintained and the piston of the cylinder 162 is moves downward while controlling a device for cutting the fastener tape.

With the forward movement of the block 15, the switch 270 has been opened, whereby the belt conveyor motor has been switched off again, and likewise the coil 122 of valve 121.

The re-tensioning cylinder 117 can now be ventilated again so that the tension on the belt and thus on the holders 284 and 290 disappears. As a result, the Coil 114 is energized again and the valve 113 is switched over, causing the air to flow to the rod side of the cylinder 117 below Pressure, reduced by the device 111, passes,

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so that the re-tensioning device returns to its original position. When the block 15 reaches its front position, the valve 239 is mechanically controlled by the part 240 and compressed air will enter the lowest control port 132 of the valve 131 so that this valve will toggle, thereby venting the bottom side of the cylinder 135, that cylinder controls the feed mechanism of the fastener tape and controls the feed mechanism of the fastener tape and the feed bracket of the fastener tape will freely return. The cylinder 137 receives compressed air, as a result of which the breech block 21 with the closing jaw 29 is raised and the breech block is closed. As soon as the compressed air in the cylinder 137 reaches a value greater than the setpoint value of the slave valve 139, which is connected to the pressure supply pipe 136 by means of the pipe 138, this valve 139 will let air into the upper control opening 145 of the valve 146, so that this valve switch to the position as shown in the drawing. The cylinder 212 will return to its original position, the end clamp 38 will open and the cylinder 223 of the tape return mechanism will continue to act with little force on the tape while the pressure switch 236 releases and the cylinder 164 of the leather holding clamp 5 on the bottom side receives pressure, causing it Clamp

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is opened because the working surface is on the bottom side is larger than on the rod side of the piston. When the clamp 5 is opened, the tension on the belt disappears. If the control opening 133 of the valve 131 receives compressed air, this valve is in the position shown in the drawing switch. As a result, the cylinder 137 will return to its original position while at the same time the Cylinder 135 of the feeding device of the fastener tape is again supplied with air, the piston of this cylinder 135 will move upwards, which is possible by switching over the valve 146, so that the rod side is de-energized becomes, which means that the fastener tape is reinserted.

If the amount of fastener tape is insufficient, then the feeding mechanism will of the fastener tape pass a greater distance, during which the switch 271 will turn off, whereupon the Machine will stop.

When the lowest position of the closure block 21 is reached, the valve 225 is mechanically due of part 226 controlled, whereby the control air in the

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Control port 152 of valve 151 is sent. This valve is switched to the position shown, so that the cylinder 155 moves the block 15, on the bottom side again receives pressure and ventilated on its rod side so that the block 15 can be pushed back again was tension-free, cut off between the lock and the tape supply, whereby the tape leader, "

which is on the left side of the plate 24 and the Bndklemme, which is on the other side of it, continues to move backwards at the same time as the block 15 is moved to to release the whole winding. After that the parts and 20 unlocked and the block 15 moves alone into the position in which the plate 23 with the slots 25 and 26 terminate the guide path for the tape in the tape guide frame again.

As soon as the block 15 has completely returned, the switch 272 is closed, whereupon the coil 215 the Valve 214 energizes, causing valve 181 to be supplied with compressed air is switched in the upper control opening 183.

The cylinder 192 of the tape guide frame is then ventilated so that this frame is operated under spring pressure.

109 825/1433

is closed and the piston of cylinder 223 is after Moved above for control of the tape feeder elements, whereby the tape is clamped against a feed roller is while at the same time through the cylinder 196 the tape return mechanism moves away from the tape and the cylinder 199 disengages the tape return pawl. The cylinder 162 provides for the clipping of a closure and the preform process. Once the piston of the cylinder 162 has reached its highest position, the valve 185 is switched by the mechanical control of part 186, whereupon the feed mechanism, controlled by cylinder 189, the preformed shutter brings to block 21 «. Doing so after the switch 274 was switched (using the tape guide frame) the belt conveyor motor is set in motion again, whereby the belt is reinserted and the cycle described repeats itself.

109825/1 433

Claims (1)

PATENT CLAIMS Tensioning and closing device for a synthetic band wrapped around a package, consisting of clamping elements for holding the leading end of the tape, from a device for tensioning the tape around the | Package, from a closing mechanism, which connects the overlapping tape parts together, from a Cutting device, which cuts the tape loop from the supply, and devices by means of which the Tension in the tape is relieved before the complete severing of the tape by the cutting device, thereby characterized in that a tape guide frame (1) is provided with a guide passage (14) in which a Tape can be guided according to a loop path, this path being adjacent to an end clamp (58), and that before the beginning of the loop portion of the path and past the facilities of introduction, withdrawal, and tension a hold-down clamp (5) is provided for the tape, which holds the tape under tension, and that the closing mechanism is in front of the end clamp (3 &) * where the tape parts each form the overlapping loops, is arranged, this consisting of a part (15) * which extends forward and moved backwards in the horizontal direction, consists, where 109825 / U33 "^ ⁶ "" this part connects the guide passage (14) in one position and with one in the other position Closing block (21) cooperates, which can be moved up and down and carries a cutting element, and wherein the parts of this element can be regulated by switches and the like in such a way that after the closure of the shutter the closing block (21) moves down again, releases the hold-down clamp (5) and, after the closing block (21) has returned to its original position, the horizontally movable part returns to the position in which the guide passage (14) has been connected, during this movement process the Truncation takes place. . 2. Apparatus according to claim 1, characterized in that the cutting element of the cutting device has a cut perpendicular to the plane of the tape and that this cutting element is moved in the direction of the tape surface and acts on the narrow side of the belt. J. Device according to claim 1 or 2, characterized in that that the frame of the device immediately below the lower part of the tape guide frame (1) a right-angled Has guide passage (14) which transversely 1 0 9 8 2 5 / U 3 3 " ^3T " is arranged to this tape guide frame and which is open at the top, a right-angled in this passage Hollow block (15) is arranged, with vertical side walls (I9, 20) and end walls, and the top can be removed, and this block (I5) in the guide passage (1.4) a limited forward and | Has a reverse stroke with two end positions and within this block of the vertically movable locking block (21) is guided, this block at one end a cover plate (2J) with two guide slots (25 * 26) for the tape, these slots are open on one side and are arranged directly one above the other, and in one position of the block in the extension the guide slots of the tape guide frame (1) lie, and at the other end a cover plate (24) is provided, the underside of which has a profile part (28) which with the closure block (21) for closing a closure which has been brought into this block, can work together, and that on both sides by sliding parts (19, 20) on the upper edges of the block equipped, with these sliding parts being guided into the upwardly open passage and in place the cover plate have guide slots (34), by means of a - 38 - 108825/1433 -38- 206Ü8A1 Spring (30) are held against a stop (I7) in the direction of the first cover plate (23) and with the first cover plate via a cross bolt (32) in an upwardly open transverse slot (27) of this first cover plate (23) and with slots ( 31, 42), which are less deep in these parts (19, 20), are connected, this cross bolt (32) cooperating with the rising side surfaces (35) on the upper edge of the through-side walls (10, 11), see above that after a certain movement of the block it is unlocked by the parts and can move there in that the cross bolt (32) emerges from the less deep slots (31 * 42) of these parts (19, 20), these parts a release ^{slot (3 2} Ohaben, which is open at the top, is located directly in front of the second cover plate (24) and one of these parts (20) is equipped with a cutting knife (33) at the point of this release screw (34) in which this Cutting knife (33) only in d he height of the lowest guide rail (34) for the tape is arranged. 4. Apparatus according to claim 3 * characterized in that that the end clamp (38) mounted in the other movable part (I9) is. 109825 / U33 3Sr Blank page