SU1743890A1 - Device for cutting fine-sheet reel material - Google Patents

Abstract

The invention relates to the harvesting production of industrial enterprises, specifically to the cutting of flat blanks of sheet-rolled material, and allows to increase the productivity of the device by reducing the preparatory time at start-up and by increasing the convenience of its service by the operator. The device for cutting the sheet material is equipped with an electrically driven screw mechanism for setting the roll to the working position, a drum cable mechanism for feeding the end of the web of web material into the machine and a lever and screw mechanism for forcing the upper feed rolls. The device for adjusting the length of the cut billet is made in the form of a drum with a variable number of cams along the generatrix connected to the pusher of the movable cross-cutter through a roller fixed to the pusher with the possibility of axial movement. 2 hp f-ly, 7 ill.

Description

WITH

WITH

The invention relates to the blank production of industrial enterprises, in particular, to the technique of cutting flat blanks from a sheet of rolled sheet material.

The invention can be used to produce blank packaging boxes, cut packaging material into sheets of soft packaging of required sizes, cut writing paper rolls into sheets of predetermined formats, and the like.

A known machine for making cardboard parts from rolled cardboard, comprising two feed rollers, circular knives for longitudinal cutting of cardboard, plane-parallel scissors for cross-cutting, stamps for cutting out shaped pieces.

The disadvantages of this machine are that it does not provide a mechanism for setting the roll to the working position, a mechanism for filling the beginning of the web of web material into the machine, a mechanism for forcibly lifting the upper feed roller when charging for the beginning of the web of material into the machine, a mechanism for adjusting the length of the cut piece at cross cutting. This makes it difficult to maintain the machine and reduces its technological capabilities.

A device for making cardboard blanks is known, which contains feed rollers, a pair of rollers with knives for longitudinal cutting of cardboard, knives for transverse cutting.

The disadvantages of this device are similar to those described.

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about

ABOUT

Closest to the proposed device for feeding the end of the paper web into a processing machine, comprising a roll holder and a cutting mechanism.

However, when using the device, the maintenance of the machine is difficult, its performance is low.

Thus, the installation of the coil into the working position is carried out by intrashop lifting means with the necessary manual adjustment of the coil position. In the case of installation of the machine in a room without lifting devices (non-mechanized warehouses, packing areas, etc.), manipulations with a human body roll by hand are inevitable. Refilling the beginning of the web of web material into a machine with a roll of maximum width (according to the material standard up to 2 m) also causes considerable difficulties. To skip the beginning of the web of material between the conveyor rollers, the upper roller shafts have to be pushed up by means of improvised means. Proper unwinding of the roll is ensured only when the web of web material is fed into the machine strictly perpendicular to the shaft of the transport rollers. In order to avoid distortions of the web, its beginning has to be introduced into the machine simultaneously from both ends of the roll, since access to the middle of the web is blocked by the machine’s aggregates. Thus, the refueling operation takes considerable time and requires the participation of at least two people. In addition, the filling operation is repeated not only for each new roll, but also for each break of the web material.

The purpose of the invention is to simplify the design and improve serviceability.

This goal is achieved by the fact that the machine is equipped with an electrically driven screw mechanism for installing the roll into the hinged supports with a drum and cable mechanism for filling the beginning of the web of roll material into the machine, a lever-screw mechanism for forcing the upper feed rolls, and a device for adjusting the length of the cut the billet is made in the form of a drum with a variable number of cams along a generator connected with a pusher of a movable cross-cut knife through a roller fixed to the pusher with POSSIBILITY axial movement.

At the same time, the electrically driven screw mechanism for installing the roll into the folding supports is made in the form of helical gearboxes,

the high speed shafts of which are connected by a common gear shaft, and the low speed shafts are connected via vertical spindle screws to the shaft-roll holders of 5 liters,

Drum-cable mechanism for filling the beginning of the web of rolled material into the machine is designed as mounted in the upper part of the machine above the feed

10 shafts of a drum with a wound cable, the free end of which is connected to a spring clip under a material clip by means of a carabiner and a connecting ring,

15 The mechanism of forced lifting of the upper feed shafts is made about the type of the lead screw having sections with right and left threads for nuts, each of which is rigidly fastened to the crosshead, the ends

0 which, by means of t g, is pivotally connected with pivoting levers, provided with supports for the upper supply shafts.

FIG. 1 shows a car, a general view; in fig. 2 is a view A of FIG. one; in fig. 3 5 view B in FIG. 2 (the mechanism of the forced lifting of the shafts during the filling of the beginning of the web of material into the machine); in fig. 4 is a view of B in FIG. 3; in fig. 5 is a view of FIG. one; in fig. 6 is a section DD-D in FIG. five; in fig 7

0 is section EE of FIG. five.

The device comprises a base 1 in the form of a horizontal frame and two vertical flat cheeks. At one end of the base 1 (Fig. 1) mounted on the sides

5 supports 2 with folding supports 3. A support roll 5 of the material being cut is mounted on the supports with the help of a roll-holder 4. Further, in the direction of unwinding the web of material, a pair of guides of freely rotating rollers 6 installed by pins in the longitudinal members of the horizontal frame of the base 1, forcibly rotating shaft 7 on which concentrically

5, fixed longitudinal cutting drum knives 8, freely rotating longitudinal cutting knives 9 hinged on a stationary support shaft 10, first pair of rubber-fed

0 shafts 11 and 12, the second pair of feed shafts 13 and 14, guillotine knives 15 and 16 cross-cutting.

The feed shafts in each pair are mounted vertically above each other with mutual pressing. The shafts 7, 11 and 14 are mounted across the base 1 on the rotational supports, the shaft 10 is fixed on the vertical cheeks of the base 1 stationary. Shaft 12 is mounted in rotation supports 17. The supports 17 are installed in the vertical grooves of the cheeks of the base 1 and preloaded by springs 18. Val. 13 is made rubberized and installed by means of a hinged fastener 19 (FIG. 3). The upper guillotine cross cutter 16 is fixedly mounted on the crossbar connecting the vertical slits of the base 1. The lower cross cutter guillotine knife 15 is mounted on the same crossbar with the possibility of reciprocating movement in the vertical plane.

The shaft 11 is rotated by force from the mechanism mounted on the cantilever bracket of the base 1 and containing the stepped pulleys 20 and 21, the belt 22, the electric motor 23, the gearbox 24, the chain gear 25. On the shaft 11 a chain gear 26 is installed to drive the shaft 7. On the shaft 12 chain sprocket 27 is installed for drive shaft 13.

A reciprocating drive of the knife 15 is mounted on the right side of the horizontal frame of the base 1 between the vertical cheeks. The drive includes an electric motor 28 (FIG. 2), a slow-speed transmission (not shown), a drum 29 mounted in rotation supports. The drum 29 is equipped with cams 30-32 (Fig. 5-7). The drive also contains a fork-shaped pusher 33 mounted for swinging in a vertical plane on the transverse shaft between the vertical cheeks of the base 1. In the pusher 33 an axis 34 is mounted with a roller 35 rotating freely on an axis 34. The axis 34 is attached to the pusher 33 by means of quick-release washers 36 and nuts 27.

The device also contains a screw mechanism for installing the roll 5 into a working position mounted on a crossbar connecting the upper ends of the uprights 2. The mechanism consists of an electric motor 38 (Fig. 2), two worm gears 39, a transmission shaft 40 connecting the high-speed shafts gearboxes 39, two spindle screws 41, rigidly fastened with low-speed shafts of gearboxes 39. The spindle screws 41 are screwed into the threaded sockets of catchers 42 mounted on dovetail guides 43 mounted on racks 2.

The machine contains a lever-screw mechanism for lifting the shafts 12 and 13. The mechanism is mounted on the upper planes of the vertical cheeks of the base 1 and contains a frame 44 (Fig. 1), made in the form of vertical plates connected by spacers, a lead screw 45 with sections of the right and left threads and a flywheel for a manual drive, mounted in frame struts 44 on rotation supports, nuts 46 and 47 with right and left threads, moving along the threads of the screw 45, crossheads 48 and 49 (Fig. 2), to the centers of which nuts 46 and 47 are rigidly attached ,

and the ends of the traverse arms 48 and 49 are hingedly connected with the arms 50 and 51 to the levers 52 and 53 (Fig. 3). The levers 52 and 53 are hingedly mounted on the supports of shafts 54 and 55. Traverses 48 and 49 with their holes slid along guide pins (not shown).

The device has a drum-cable mechanism for filling the beginning of the web of rolled material into the machine. The mechanism contains a drum 56 with a manual drive,

5 mounted in the rotation supports on the left strut of the frame 44 wound on the drum 56 a cable 57 with a quick-release carabiner 58 at the end, a bypass rotating roller 59 mounted on the right strut of the section 44, clip 60 to grip a web of material 61 made in the form of two pairs rubberized and spring-loaded plates. The clamp 60 is provided with a ring 62 for fastening the cable 57 with the carabiner 58.

5 The device operates as follows.

The roll 5 (fig. 1) of the material is delivered by the loader to the machine, where it is equipped with a roll-roll holder 4, after which the loader

0 lays the roll with the shaft on the catchers 42. The folding supports 3 are installed vertically (folded). The inclusion of the motor 38 through the gears 39 and the transmission shaft 40 is driven into rotation

The 5 spindle screws 41, which move the catchers 42 along the guides 43 above the level of the supports 3. Then the supports 3 are folded back to a horizontal position. When the motor 38 is reversed, the running screws 41, rotating in the opposite direction, lower the catchers 42 until the pins of the roll-holding shaft 4 do not fit into the cylindrical sockets of the supports 3. Such an installation scheme ensures parallelism

5, the axis of the roll 5 and the axis of the supply shaft 11, which is necessary to prevent lateral shearing of the web during unwinding of the roll by the feed shafts 11 and 12.

To refuel the beginning of the web of material 61 (Fig. 3), the disc longitudinal cutting knives 9 are first of all pulled up by turning around the supporting shaft 10. Then, manually rotating the spindle 45, which has sections with right and left

5 is threaded and rotates on tapered bearings in the sockets of the struts of frame 44, nuts 46 and 47 pull together, one of which is right and the other is left-handed. The nuts are attached to crosspieces 48 and 49 (Fig. 2), sliding along rolling pins (not shown). Pivotally mounted on the ends of the cross member, the connecting rods 50 and 51 (Fig. 3) move the levers 52 and 53 around the supporting shafts 54 and 55. The ends of the levers 52 raise the feed shaft 12 together with the supports 17 sliding in the grooves of the cheeks of the base 1 , compressing the spring 18. The ends of the levers 53 raise the feed shaft 13 installed with the help of a hinge 19, overcoming its weight. This provides the necessary clearance between shafts 11 and 12 (first pair) and shafts 13 and 14 (second pair). The beginning of the web 61 of the material across its width is covered by spring-loaded rubberized plates of the clamp 60 with the ring 62 (Fig. 4) From the drum 56 through the bypass roller 59 into the gap between the pairs of shafts 13 and 14, 11 and 12 and further over the shaft 7 and under the guides shafts 6 feed cable 57 with a quick-release carabiner 58. The carabiner clings to ring 62. When the drum 56 is manually rotated, the cable 57 is wound on the drum 56 and pulls clamp 60 with the beginning of the web of material along the entire path of movement of the material in the car. After the passage 60 of the gap between the shafts 13 and 14, the beginning of the web material 61 is released from the clamp 60 and is held in the gap between the knives 15 and 16 of the cross-cutting. The latter operation is easily performed manually, since in this zone the structure of the machine provides free access to the entire width of the web.

After filling the beginning of the web of material into the machine by reverse rotation of the lead screw 45, the shafts 12 and 13 are lowered into the working position: the shaft 12 under the action of the springs 18, the shaft 13 under the action of its own weight. In this case, the web of web material is clamped between shafts 11 and 12 (first pair), 13 and 14 (second pair). After lowering the circular knives 9 into the working position, the machine is ready for cutting material.

By turning on the electric motor 23, the feed shafts 11-13 and the drive shaft 7 are driven into rotation. The pairs of shafts 11 and 12, 13 and 14 rotate and draw a web of material to the cross-cut knives. The rotation is transmitted to the shaft 11 by a belt variator consisting of stepped pulleys 20 and 21 and a belt 22, a gearbox 24 and a chain gear 25. Rotation of the drive knives 8 to the drive shaft 7 is transmitted through the chain gear 25. The rotation to the feed shaft 13 is transmitted from the shaft 12 through a friction clutch of the limiting moment (not shown) and chain transmission 27. The chain transmission 27 is made so that the shaft 13 has a greater frequency

rotation than the shaft 12. The rupture of the web of material in the area between the shafts is prevented by the slip of the friction clutch,

5 Longitudinal cutting of material into strips.

carried out by moving to a predetermined position of the drum knives 3 along the drive shaft 7 and the disk knives 9 along the support shaft 10. The disk knives 9 freely

0 are rotated on axes and set in motion by friction with their automatic pressing with springs to the ends of the drum knives 8 fixed concentrically on the shaft 7,

5 In order to transversely cut the 8 key, an electric motor 28 (Fig. 2) is driven through a slow gear by rotating the cam drum 29. The cam 30 is made along the entire length of the drum, the cam 1 is one third of the length of the drum on the left, two cams 32 are on a third of the length of the drum on the right. Thus, the drum 29 in the left third has two cams, in the middle - one, in the right third - three cams, With a drum 29

5, the roller 35 interacts, rotating on the axis 34 mounted in the pusher 33. The pusher 33, periodically pressed with the cams of the drum 29, lifts the spring-loaded lower cross-cutter 15,

0 cut off the preset size. The roller 25 of the pusher 33 can move along the generator of the drum 29 along with the axis 34. The roller 35 can be installed in one of three positions: to move

5, it is sufficient to loosen the nut 37 and rearrange the quick-release washers 36 provided with slots for the axis 34 open on one side. The selected position of the roller 35 is fixed by tightening the nut 37. To set the roller 35 to the extreme left, both washers 36 are rearranged on the axis 34 to the left from the pusher 33, in the middle - one washer to the left and right, to the far right - both washers to the right. In the leftmost position of the roller 35, the pusher 33 produces two cuts per turn of the drum 39, one cut in the middle position, three cuts in the rightmost position, providing a stepwise adjustment of the cut size. Additional adjustment of the size is provided by changing the speed of paper pulling by shifting the belt 22 on the stepped pulleys 20 and 21. At the time of cutting, the pusher 33 with the aid of an additional lever (not shown) raises the supply shaft 13, turning it on the hinge bracket 19, and stops the paper to cross-cut knives. At the end of the cutting, the shaft 13 is lowered and due to a higher frequency than that of the shaft 12,

rotation chooses a loop of material that has accumulated between shafts 12 and 13 during cutting. After the loop has been sampled, the material is pulled up and begins to brake the shaft 13, which causes the friction clutch to engage and the shaft speed 13 to decrease. Thus, the material between the shafts 12 and 13 is prevented from breaking.

The cut pieces are stored in a stack on the receiving table or in the receiving tray.

The proposed design of a device for cutting a thin-rolled material provides for the installation of a roll of material into the working position of an electrically driven screw mechanism, which facilitates handling of the roll and improves the working conditions of the operator, the use of a drum-cable mechanism for filling the beginning of a web of rolled material and a lever-screw mechanism of forced lifting of the upper feed rolls, which facilitates the work of the operator, allows one person to refuel the width of the roll, while reducing the number of service personnel, just the time of the machine when installing a new roll or breaking a rolled web, which increases the productivity of the machine.

The use of a cam drum with a different number of cams along the axis and a pusher roller that interacts with this drum to drive the knives accelerates the changeover of the machine to different sizes of workpieces, which also increases the productivity of the machine.

Claims (2)

1. Device for cutting thin-rolled web material, containing shaft-roll holder mounted on the base, paper web end feeding mechanism into feed rollers installed one above the other, having a clamping element, upper feed rollers lifting means, blade cutting unit with a cutting element and electric drive , with the fact that, in order to simplify the design and improve serviceability, the feed mechanism of the end of the paper web is designed as a drum mounted above the feed rollers a cable attached to it, the free end of which is connected to the clamping element, which is spring-loaded strips, and the means for lifting the upper feed rollers accept the lead screw with sections with right and left threads for nuts, rigidly connected with each nut to the cross bar and connected to the ends of the cross bar by means of t g swivel levers provided with supports for the upper feed rollers. 2. The device according to claim 1, of which it has racks with folding supports with cylindrical sockets, an electric drive mechanism for installation mounted on the shaft of the roll holder in folding supports, containing worm harnesses mounted on the racks gearboxes whose high-speed shafts are connected by a common transfer shaft, and catchers of the roll-holder shaft, connected by means of vertical spindles to the low-speed shafts of the gearboxes. 3, the apparatus according to claim 1, characterized in that it has means for adjusting the length of the cut piece, made in the form of a drum with a variable number of cams along a generatrix connected with a pusher cutting tool with a roller for interacting with the drum. SS K 7 Z / 7 W 8 / Zl I W® No. " W / 3fl0 OGSCfril. U I S 61 Ј $ 99 tt ZS U ft 15 tt t7l tf t $ t $ W % Of and gg 9 & u 068Cbil ei Fm five Hid d FIG. 6 Ј-Ј