SU806540A1 - Device for forming transverse seams in heat-welded bag stock and severing ready packages - Google Patents

Description

neither the finished packages, the copier for controlling the clamps of the upper conveyor is spring-loaded, installed by means of a lever parallelogram and having a driving cam with which it is connected by a lever, a pull and one revolving clutch, the device having a spring-loaded hook for the lever, an emphasis for the clutch , a limit switch for interacting with the lever and two electromagnets, one of which is connected to the limit switch and serves to interact with the clutch stop, and the other serves to interact with the latch. In order to provide manual control, the device has an additional stop freely mounted on the axis of the stop for the coupling, which is provided with a support finger for an additional stop in the circumferential direction, with the additional stop being connected by means of a pull with a latch for the lever and an additional pull manual control. In this case, the latch for the lever consists of a lock bar that is freely installed on one axis and a spring loaded lever for interacting with the bar; a copier for controlling the clamps of the upper conveyor consists of sections installed with the possibility of adjusting their position relative to the clamps of the upper conveyor. Figure 1 shows the proposed device, a longitudinal section; figure 2 - section aa in figure 1; section BB in figure 1; figure 4 - node I in figure 1; figure 5 is a section bb In figure 2; figure 6 - section GG on fig.Z; figure 7 - section dD in fig.Z; FIG. B shows a circuit diagram of the device; figure 9 is a part of the device (figure 1), with the position of the mechanisms corresponding to the stop; figure 10 is the same, with the position of the mechanisms corresponding to the start of operation of the device; in fig. 11 - the same, {fig.Z). with the position of the mechanisms, the corresponding manual control device; in fig. ::; - the same, (figure 1) at the position of the mechanisms, the corresponding manual control device. The device contains the lower and upper chain conveyors 1 and 2. The lower chain conveyor 1 has a shaft with drive sprockets 3 and an axis with tension sprockets 4, two chains 5; guides b for chains, supports V for articles and 8 clamps 10 for heat-sealable material mounted on the copier controlled by the 8 levers 9. The upper chain conveyor 2 has a shaft with drive sprockets 11, an axis with tension sprockets 12, two chains 13, guides 14 with carriages 15 having shafts 16 with levers 17. On. levers 17 can be mounted with a clamp with heaters) 8 for heat-sealing material. The upper c-belt conveyor also has levers 19 with rollers 20 and a copier 2i, while the rollers 20 are pressed against the latter by springs 22 placed on the shaft 16. Copier 21 serves to control the upper chain-pressure clamps of the conveyor 2 and has section 23, mounted on the strap 24, while the sections are installed with the possibility of adjusting their position relative to the clamps of the upper conveyor by means of grooves under the fastening screws {not shown). Plank 24 is set pivotally with the help of fingers 25 located at the ends of the levers 26 forming the parallelogram. The copier 21 has a drive cam 27 to which it is connected by means of a lever 28, a pull rod 29 and a single turn coupling, the latter being formed by a ratchet 30, a latch 31 and a pivoting stop 32 for the coupling. The ratchet 30 is mounted on the shaft 33, on which is also installed an asterisk 34 connecting the device with the drive (not shown in the drawing). The swivel stop 32, located in the same vertical plane with the latch 31, is freely mounted on the vertical axis 35. The cam 27 is fixed on the hub 36 and the ha 29 is pivotally connected with the strap 24 and the other finger 38 with the lever 28. Lever 28 mounted on an axis 39 by means of a bracket 40 in the lower part of the frame 41. Roller 43 is mounted on the second arm 42 of the lever 28, while the cam section 27, closest to the axis of its axis, is facing the latter, resulting in a gap between the rollers and the cam profile. The conveyors 1 and 2 are driven by a chain 44c by a leading sprocket 45 (FIG. 3) mounted on shaft 33. The plates of chains 5 of conveyor 1 are fixed to axles 46, on which supports 7 for packaged items and levers 9 are freely mounted, the axes of the rollers 47 supported on copiers 8 and under the action of springs 48 are fixed on the latter. The guides 14 of the chains 13 of the conveyor 2 are mounted on a shoe 49 fixed through the plates 50 on the stitch 51 and the arm 52, while the plates of the chains 13 are connected to carriages 15, each of the carriages i5 has three rollers 53 with axes of rotation in the horizontal plane and two rollers 54s from the rotation through in the vertical plane. The rollers are placed in the grooves formed by the guides, with the possibility of communicating to the carriage the movement only in the direction of movement of the chains. To supply voltage to the heater, each carriage is equipped with a brush holder 55, the contact brushes of which are connected to conductive buses 56 and 57, the latter being fixed on guide carriages through electrically insulating plates 58. The bus 56 is made different, and the bus 57 for parts. Its length is composed of separate sections 1; between which there are spacers 60 of electrically insulating material (Fig. 4) for providing different periods of time, for applying voltage, to heaters by connecting conductors of different sections 59 of tire 57 to axis 35. A second stop 61 is installed, the upper and lower levers 62 and 63, wherein the upper lever of the articulated thrust 64 is connected to the control lever 65, the axis of rotation 66 of which is mounted on the plate 67 fixed to the frame. To provide manual control, a handle 68 is installed on the second shoulder of the leverage 65 with a spring lock 69 inserted into the opening of the plate 67 (Fig 6). The stop 61 is connected by means of a pull 70 to a spring loaded latch for the lever 28 and the pull 64. with handle 68 for manual operation. The latch for the lever 28 consists of a stop bar 72, which is freely mounted on the same axis 71, and a lever 73 for interacting with the bar. A stopper on the strip 72 is connected to the lever 73 by a spring 74 (Fig. 7). Under the lever arm 28, a limit switch 75 is mounted on the frame for interacting with it. The device (Fig. 8) has two electromagnets 76 and 77, wherein the latter is connected to the limit switch 75 and serves to interact with the stop 32, and the electromagnet 76 to interact with the latch 31 for the lever a 28. The electrical circuit of the device also includes motor 78, magnetic starter 79 with groups of normally open contacts. 80-83 and normally closed contacts 84. and 85, relay 86 with normally closed contact 87, voltage regulators 68 and 89, Start buttons 90 and 91 / and Stop and voltage switch 92. Bus 56 is connected to the zero conductor, and section 59 of the bus 57 to the phase device. The device operates as follows. .. Objects 93 (Fig. 1) are fed into rukava S4 of the packaging material onto the lower chain supports 7 On the conveyor 1, the sleeve edge in front of the first object being fed into the device is inserted between the collapsed clamps 10 and the heater - 18. and 11 chains 5 and 13 move uniformly together with clamps 10 and heaters 18 in the direction of arrow 95 (Fig. 1), moving the sleeve with the object. After the rear part of the object is moved beyond the vertical plane behind it, alternate clamps 10 and heater 18 are placed. Then rollers 47, moving along copiers 8, turn levers 9 with clamps 10, as a result of which the latter rises above the level of the lower plane of the object, from below sleeve packaging material. At the same time, when moving the pin 13, the carriage 15 moves on the rollers 53 and 54 along the guides and the roller 20, interacts with the cam 21, rotates the lever 19 with the heater 18, as a result of which they move towards the clamp 10, hitting the sleeve of the packaging material from above, Heater 18 heats up the voltage from tires 56 and 57 through the brush holder 55, and the start and end times of heating are determined by the place of the beginning and end of the voltage supply to the phase bus either to the two extreme sections 59 or to four sections (two extreme and two It comes closest to them, connected with them by wires), which allows welding with a constant heating of the heater when all sections are connected in series with each other, and with pulsed heating with partial connection of sections. The heated heater presses the film to the clamp 10, welding it and separating the packages. If necessary, the maximum duration of the contact of the heater with the film, the sections of the copier 21 are set during adjustment so that the lower edges lie in the same plane. In another case, the lower edges of some sections of the copier 21 are higher than others. If the extreme left section (Fig. 5) is set in a raised position, then the roller 20, moving to a higher level of the copier, provides, under the action of the spring 22, the shaft 16 with the lever and the heater 18 moving away from the prizkma 10. During the movement one item when pulling the sleeve sandwiched between the clamp and the heater, the next clamp and the heater converge behind the back side of the item, providing welding and cutting of the packaging material between the items, clamping the sleeve and beginning the packing of the next item. When the roller 20 moves along the bevel of the left section of the copier 21, the heater 18 moves back to its original position. Then the carriage with the heater moves along the upper branch line and then returns to the beginning of the lower working branch of the upper conveyor. Similarly, the levers 9 with the clamp 10 bend around the drive sprockets 3 of the lower conveyor, while the rollers 47, moving over the copiers 8, lower the clamp 10 under the action of the spring 48 until the upper edge of the clamp is at the top of the supports 7. Then the levers with the clamp, they move along the lower branch of the conveyor, go around the sprockets 4 and return to the beginning of the upper working branch of the conveyor. When the vrsitsiots device runs, shaft 33, electric motor sprocket 34, drive sprocket 45 Chains of conveyors and ratchet 30 Since the latch 31 is removed from the teeth of the ratchet, the hub 36 and cam 27 are fixed and held in this position due to the stop of the latch shank 96 in the spring 32. The circuit operates as follows. The circuit elements have a voltage under the switch 92. When the Start button 90 is pressed, the booster of the magnetic starter 79 turns on, and its contact is activated. 80 locks the button 90, the contacts, 81 turn on the electric motor 78, the contacts 82 apply voltage to the electromagnets 76 and 77, the contacts 83 turn on the voltage regulator 88, the contacts 84 turn off the voltage regulator 89, and the contacts 85 turn off the voltage on three middle sections 59 busbars. Thus, the voltage on the heaters 18 is supplied through the brushes with brush brushes 55 from only the four end sections, which provides a pulsed welding mode. Since, in the position of the lever 28 shown in FIG. 1, the end switch 75 is pressed, the coil of the relay 86 is turned on / and its contact 87 turns off the electromagnet 76. This position of the working bodies corresponds to the normal setting of the operating mode of the devices. . Regulation 88 of heaters establishes the voltage required for welding and separation of the package. Structurally, the middle section 59 is of the greatest length, and the two sections closer to it are smaller than the step of the carriages, while the middle section is not supported by Given the voltage, the current collector brushes of several heaters can be at the same time. The device is stopped by pressing the Stop button 91, the coil of the magnetic starter 79 is turned off, and all the contacts are in the position shown on. Fig.8. The iJO motor stops and the voltage from regulator 89 is applied to all sections 59, with the result that all heaters are under reduced voltage to maintain the required temperature without overheating them; Opening the contact 82 turns off the electromagnets 76 and 77, and when the latter is turned off, the lever 73 rotates around the axis 71, which with the roller 97 removes the electromagnet’s bark and turns the stopbook 72 on the axis 71 (FIG. 9), which releases the locking lug of the lever 28. Due to the linking of the lever 28 through tgu 29 with the bar 24 last under the action of the spring, the lever 28 is raised / turned up to the stop of its roller 43 into the cam 27. At its turn, the lever 28 releases the limit switch 75, and the parallel subframe 24 with the help of levers 26 o espechivaet lift the copier 21, the rollers 20 by springs 22 also are raised by rotating the lever 19 through the shafts 16, causing the heaters 18 extending therefrom, of rams 10, releasing the packaging material. This prevents the packing material from melting and sticking to the heaters when the device is stopped. When the drive is turned on by pressing the button 90, the magnetic starter 79 is turned on and, by the way, the electromagnets 76 and 77 are turned on by turning on the contact 82, the section 59 switches to supply voltage from regulator 88 through contacts 83 and 84 and through contact 85, in which the voltage on the heaters is applied only to the end sections. When you turn on the electromagnet. 76 its measles nikikimayaet on the shoulder of the stop 32, turning it relative to the vertical axis 35. The stop 32 when it rotates releases the shank of the latch 31 and last, turning on the axis under the action of the spring 98, enters its tooth between the teeth of the ratchet 30. Because when turned on the drive shaft 33 rotates with the ratchet 30, then it rotates -. with and the latch together with the hub 36 and the cam 27. The cam 27, acting on the roller 43, turns on the axis. 39 lever 28, which through t -. gi 29 lowers to the lower position

the bar 24 with a cam 21, under the action of the latter, the heaters 18 are lowered onto the clamps 10,

When the electromagnet 77 is turned on, the lever 73 rotates the locking bar 72 (FIG. 10), and when the lever 28 is rotated to the lower position, its locking end, lowering, meets the bevelled front plane of the locking tooth 99 of the bar 72 and squeezes out the latter, turning it f axis 71, with spring 74 expanding and lever 73 in place. Such an electromagnet with a locking bar is necessary to prevent the electromagnet core from separating from the stator when the latter is turned on.

In the lower position of the lever 28, its locking end falls below the locking tooth 99 of the bar 72 and the latter, returning to the initial position (Fig. 7) under the action of the spring 74, positions its tooth above the locking end of the lever 28, keeping the latter in the lower position. In its turn, the lever 28 presses the limit switch 75, turning on the relay 86, which by the contact 87 turns off the electromagnet 76, as a result of which the stop 32 turns under the action of the spring to the initial position (Fig. 3).

Since the lever 28 is lowered to the lower position until the cam 27 is fully rotated, the stop 32 will also be returned to its initial position, therefore, the most recent rotation of the shaft 33 with the ratchet 30, the latch 31 and the cam 27 is accomplished before The moment the latch 31 meets with the stop 32, the latch turns around its axis and its tooth emerges from the teeth of the ratchet. The dog rests with its shank 96 against the stop 32, as a result of which the rotation of the hub 36 with the cam 27 stops. All elements of the device occupy the position shown in figure 1, corresponding to the operating state of the device,

In the case of a device, there is a need to ensure its manual control. Since, in this case, the voltage is not applied to the elements of electrosche1, 1, the latter occupy the position shown in Fig. 9. In this case, the handle 68 is transferred from one extreme position (Fig. 3) to another (Fig. 11). In each of the extreme positions of the handle is held by the latch 69, entering. the corresponding hole in the plate 67. When the handle is turned, the velcage 65 is rotated on the axis 66 and by means of the rod 64 rotates the lever 62 together with the vertical axis 35, as a result of which the rotating stop 61 and the lower lever 63, the Stop are rotated. 61 turns in turn ulor 32, releasing the tail-pin of the flap 31, with the stop 61 at-Omits in the same vertical plane with the latch 31 and above its shank. The latch 3.1 enters its tooth between the teeth of the ratchet 30 and, with a further rotation of the device, manually rotates the cam 27.

Turning the lever 6 3 moves the ha ha 70, under the action of which the lever 73 is rotated (Fig. 12), which causes the locking bar 72 to rotate in a position prepared for fixing the lower position of the lever 28,

I Thus, when the cam device is manually turned, the cam 27 lowers the lever 28 and the heater control copier 21 connected to it by a hard 29, which causes the latter to close with the clamps 10, the lever 28 is fixed by the bar 72, upon further cam rotation 27, the latch 31 meets the y-pitch 61, its tooth emerges from the ratchet teeth of the shank 96, rests against the abutment 61 and the cam rotation stops. The elements of the device occupy the position shown in Fig.12.

To prepare the device for operating status, the handle 68 must be returned to the position shown in Fig. 3, while the levers 62,63 and 65 and the pivot stops 32 and 61 also return to the position shown in Fig. 3, Lever 73 and the bar 72 is rotated, releasing the lever 28, as a result of which the levers 28 and 73 and the locking bar 72 return to their original position (Fig. 9). The latch 31, released by the stop 61, enters the tooth of the ratchet 30 with its tooth, and the stop 32 is located under its shank.

If, after the handle 68 is moved to the position shown in FIG. 3, the device is manually rotated again, then when the shaft 33 is turned at a certain angle, the latch 31 meets with the stop 32 and disconnects the cam 27 from the drive. All elements of the device occupy the position shown in Fig.9, corresponding to their position after stopping the device.

In the future, the cycle of operation of the device is repeated.

The proposed device improves the reliability of work and provides manual management.

Claims (4)

1. An apparatus for forming transverse seams on heat-sealable sleeves and cutting off finished packages containing lower chain conveyors, supports for objects and mounted on copier-controlled lever hooks for heat-sealing material, upper chain conveyor with positioned levers on the guide carriages Console mounted on heaters and clamps of heat-sealable material, and additional chapters with rollers, and an additional copier, characterized in that, in order to increase reliably For operation, the copier for controlling the clamps of the upper conveyor is spring-loaded and installed by means of a lever parallelogram and has a driving cam with which it is connected by means of a lever, a pull and a single-turn coupling, the device having a spring-loaded latch for the lever, a support for the coupling, interaction with the lever and two electromagnets, one of which is connected with the limit switch and serves to interact with the clutch stop, and the other serves to interact with the latch. 2. The device according to claim 1, characterized in that, in order to provide manual control of the device, the latter has an additional stop, freely mounted on the axis of the stop for the coupling, which is provided with a bearing pin for an additional stop in the circumferential direction, and the additional stop by means of connected with a latch for the lever and an additional gig - with a handle for manual control. 3. The device according to Claim 1, so that the latch for the lever consists of a locking bar freely mounted on one axis and a spring-loaded lever for interacting with the bar. 4. The device according to Claim 1, which means that the copier for controlling the clamps of the upper conveyor consists of sections installed with the possibility of adjusting their position relative to the clamps of the upper conveyor. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 659459, cl. B 65 B 51/26, 1977. at H Y 22 15 ff 30 56 yj A-D / / .X. 5 56 18 6566. 67 68 P 5-5 . 6060 / / 57 56 ..- . 39.39 26 242i  Faye. five chi b 69 67 Y //////// A FIG 6 72 61 68 65. G, 32 W / SVvfew / 2f