FI65929C - MASKIN FOER ATT FRAMSTAELLA MED I VAEGGAR INDRIVBARA FAESTFLIKAR FOERSEDDA HOERN- ELLER KANTBESLAG FOER LAODOR EMBALLAGE CONTAINERS ELLER ANDRA BEHAOLLARE - Google Patents

Description

2 65929 or damage, but instead the production volume per unit of time decreases very much.

The present invention, which is intended to solve the problems of manufacturing various reinforcements and to provide a flawless stamping, punching and shaping despite the continuous feeding of the strip, is characterized by what is stated in claim 1.

In the following, an apparatus according to, for example, a selected embodiment of the invention will be described in more detail with reference to the accompanying drawings, in which FIG. 1 is a side view of the apparatus, FIG. Fig. 2 shows the same seen from above, Fig. 3 shows a perspective and partially sectioned view of one of us belonging to the apparatus, Fig. Fig. 4 is a perspective view of a part of the punch belonging to the apparatus in a larger size and partly sectioned, Fig. 5 is a perspective view of a shaping device belonging to the apparatus in a larger size, Fig. 6 is a perspective and partially sectioned view of the hardware program device and Figs. 7A-H show parts of a strip processed at different machining stations.

In Figures 1 and 2, reference numeral 1 means in its entirety the first punch, 2 the second punch, 3 the third punch, 4 the fourth punch and 5 the fifth punch. The storage of the strip-like substance is indicated by reference number 6 and the equipment for programming is indicated by reference number 7.

8 denotes a position for pressing the stiffening groove of the strip and 9 a profile former. Reference numeral 10 denotes a shaping device for making the bulges shown below on the strip. 11 means a cutter and 12 a strip formed into reinforcements or reinforcements.

Reference is made to Figures 7A-H, which illustrate the steps of making reinforcements of the desired shape from two initially planar, elongate strips. Fig. 7A shows how, in the first step, a group of fastening strips 13 are made on the strips at a certain distance from each other, each group comprising a first number of strips, in this case three. In Fig. 7A, the groups are denoted by reference numeral 13 '. This first step of the method is performed in the first deist 1 shown in Figures 1 and 2. In each deist 2, the next step of the method is performed, in which additional groups of 13 "fastening strips (see Fig. 73) are made on the food, each new group 13" comprising a second number of fastening strips. namely, two. In the third punch 3, an additional 3 65929 group 13 "'(see Fig. 7C) are stamped, each comprising a third number of fastening strips, namely one. The first three punches 1-3 thus stamp groups of fastening strips which together form a single row of strips on each strip. however, with the exception that at certain intervals the parts 14 are repeated, for which the bending notches are later stamped.

Figure 7D illustrates how elongate holes or slits 15 are suitably punched in the center of each strip, with the longitudinal direction of the holes being parallel to the longitudinal direction of the strip. The purpose of these holes is to leave a place for the reinforcement to be extended or connected to the reinforcement in question. The fact that in this case the holes are placed in the middle of the strip is due to the fact that the strip is later given a V-shaped cross-sectional profile in which the sides of the V are equal. It follows that the holes 15 will be exactly in the boundary area between the sides. The punching of the holes 15 is performed with the fourth punch shown in Figs.

It can be seen from Figure 7E that the triangular notches 16 are punched into the strip so that later the V-shaped reinforcement can be bent, for example, at a right angle. In the embodiment shown, the notches 16 are located on the same side of the strip as the fastening strips 13 and extend from the edge of the strip to its center. In this way, the notches cut off one side of the V, so that the other side can be easily bent. It can also be seen that the notches are stamped on those parts of the strip 14 which do not have fastening strips. The notching of the notches 16 is performed in the fifth punch 5 shown in Figs. 1 and 2 *

Fig. 7F shows that a stiffening groove 17 »is made along the other edge of the strip, which is located on the opposite edge of the strip from the fastening strips. The stiffening grooves are made at the previously mentioned printing station 8.

Fig. 7Gr illustrates how the strips are bent into a V-shaped or right-angled cross-section, whereby two angled sides 18 and 19 are formed. This takes place in the profile former.

Figure 7H shows that the side 18 is provided with bulges 20 associated with the elongate holes 15. These bulges will be located on the above-mentioned second reinforcement, which is later connected to the second fitting made of strip. Of this 4 65929 wires, the height of the bulges relative to the side is at least equal to the thickness of the second fitting. The bulges 20 are made in a shaping device 10 located after the profile former 9.

In the last step, the strip thus formed is cut by the cutter 11 into pieces of a predetermined length, forming bendable reinforcements which, after bending, are ready to be used as parts of the container by striking the fastening strips on the walls of the containers.

In the apparatus according to the invention, the strips are fed mainly. continuously from stock and during stamping and working operations, each device is caused to move along the belt and to follow the belt at substantially the same speed as the belt, whereby after the work performed, the devices are returned to the initial position.

Referring now again to Figures 1 and 2, it will be seen that the storage 6 is formed by a spool 21 with two rolls with strips 12a and 12b. The strips can thus be unloaded from the rolls, which after completion are replaced by new rollers, respectively, by installing the side pieces 22 of the spool. The strips pass from the spool through a folding roll 23 arranged on the die 24 arm 24. A photocell device 25 can be advantageously arranged on this arm, which indicates the end of the tape rolls and by means of which the main switch cuts off all the functions of the punch, the profile former, etc., in order to allow the strips to continue from the new reel tape. The intervals of such an extension naturally depend on the length of the strip of rolls, and when the lengths of the strip are chosen to be sufficiently large, e.g. several hundred meters, the intervals preferably become long.

Since all the punches 1-5 and also the cutting device 11 are constructed in essentially the same way, only one punch will be explained in detail below. This is done with reference to Fig. 3, which shows that the die comprises a housing 26 with two tubular holders 27 on the underside, which are movable along two guides 29 mounted on a stand 28. These guides 29 are parallel to the longitudinal direction of the strips 12, as a result of which the housing 26 can move in the direction of the strips. According to the invention, the displacement of the housing 26 is performed, for example, by means of a pneumatically operated piston rod 30 in a cylinder 31 fixedly mounted on the base. The outer end of the piston rod 30 projecting from its cylinder is connected to the housing 26 by means of a rod 32 projecting downwards from its lower surface. The housing 26, shown in Figure 3 in the initial position, can be locked to this initial position by means of a pivotable latch or latch 5 65929 33 which, in the locking position, engages a hole in the body 34 attached to the housing and projecting therefrom. The latch 33 is preferably movable into and out of the locking position by a pneumatically, hydraulically or electrically operated cylinder-piston device 35. A protective limit switch 36 is arranged opposite the latch 33 to cut off all punches and the like if the housing accidentally or incorrectly moves. to the end of its leftmost position.

Attached vertically to the top of the housing 26 is a hydraulic cylinder 37 to which a vertically reciprocating piston rod 38 is fitted. Both lines 39 and 40 are flexible, preferably rubber hoses, so that the housing 26 can move. Connected to the lower end of the piston rod 38 by means of a joint 41 is a pressure plate 42 adapted to slide along the vertical posts 43 of a support plate 44 fixed to the horizontal lower part 45 of the housing 45. Attached to said support plate 44 is a guide member 46 which, in the case of stamping punches 1-3, is plate-shaped, with two strips 12 laterally guiding the edge strips extending over the tops of the strips and a central center strip extending over the top of the strips. The plate is attached to a post that can be flexibly pressed inside the support plate 44.

Attached to the lower portion 45 of the housing 26 is a bracket 47 which supports a holding or gripping device 48. This holding device includes a support or support piece 49 which can secure the straps 12 against the upper surface of the bracket. The support member 49 is arranged vertically on the lower surface of a stem 51 pivoting about a joint or pin 50, the outer end of which stem is articulated from the piston rod 52 of the hydraulic cylinder 53. This cylinder 53 is suspended on the pins 54 and can pivot about them. The pins 50 and 54 are fitted to supports 55 and 56 projecting upwards from the bracket. The hydraulic cylinder communicates with the fluid pump or source via two flexible lines 57 and 58, only one of which is shown in Figure 3 and both in Figure 2. My holder 48 is intended for strips. retention during each stamping operation and thus in a safe manner ensures that the strips do not accidentally move or move.

6 65929

In addition, the dies include a number of limit switches, two of which 59 and 60 are shown in Figure 3. These limit switches control the movements of the piston-cylinder devices 37, 38 and the holding device 48.

It can be seen from Figures 1 and 2 that the liquid pump 61 is fitted to each punch 1-5 and the pump 62 is fitted to the guarding device. The pumps 61 communicate with the cylinder 37 via lines 39 and 40 and with the cylinder 53 via lines 57 and 58. The pump 62 is common to the cutter 11 and the shaping device 10. In addition, each punch 1-5 is provided with a compressed air source 63 for operating the piston-cylinder device 30, 31. . A common compressed air source 64 is arranged for the cutter 11 and the shaping device 10, which is in communication with the drive devices 30, 31 of the cutter and the shaping device, respectively. Although the compressed air source 64 in this way is common to the cutter and the shaping device, it should be noted that their movements can be adjusted independently of each other, preferably electrically.

Reference is now made to Figure 4, which is a perspective view of a larger part of the punch 2. It will be seen from this figure that the guide member 46 is formed by a plate 65 having two outer edge strips 66 and 67 extending somewhat over the strips and a T-shaped center strip. The plate 65 is attached to columns 69 which can be pressed downwards inside the support plate 44 (see Fig. 3) against the action of springs. The actual punch members 70 are pins extending upwardly from the support plate 44 or portions thereof and which fit into holes or vias in the guide plate 65, not shown in Fig. 4. These punches have a horizontal surface oblique to the horizontal, the highest part being pointed or sharp, while the lower part is more or less rounded. Mounted on the lower surface of the press plate 42 are pads 71 with recesses 72 having the same cross-sectional profile as the punch members 70. It is apparent that as the press plate 42 moves downwards, it presses down the guide plate 65 which in turn takes the strips 12 by the strips 66, 67 and 68. downward, with the punch members 70 punching upwardly facing fastening strips 13 as they pass through the strips and penetrate the recesses 72. As the press plate 42 returns to its initial position, the guide plate 65 also returns up to the position shown in Fig. 4 under spring action. In this case, the guide plate returns only to its guiding and tape-supporting function. The fact that the fastening strips 13 are stamped upwards as described above is very advantageous, since then the strips 7 65929 can simply be passed further through other r.victs, the strips resting on their planar lower surface against the guide or support member 46 while the fastening strips run freely.

The special feature presented above is common to all three Meists 1, 2 and 3 for molding the fastening strips. The only differences between these punches are that the first punch 1 has three punch members 70 for each strip, the second punch 2 has two punch members 70 and the third punch 3 has one punch member for each strip.

In contrast, the fourth and fifth punches differ in structure from the previous ones. Thus, their punch members are attached to the Clamping Plate 42, so they move against the fixed pads attached to the support plate 44. The fourth punch 4 has cutting punches which are elongated in profile, corresponding to the shape of the holes 15, while the punch members in the fifth punch 5 are triangular in shape to form triangular notches 16.

Figure 5 is a perspective view of a part of the shaping device 10 and the cutter 11 behind it;

The shaping device 10 includes a holding device 48 of the previously disclosed quality and a vertically pivotable arm 73 on its lower surface; supports a compression member 74 having two downwardly directed, oblique pressing surfaces 75 and 76. The pressing member is movable toward and away from a abutment surface 77 having two angular channels 78 and 79, each channel or the surface of each channel having at least a small recess 80 . 81. These recesses are located directly below the die 74. when the press piece is pressed down against the V-shaped strip 12 in the channel, the other side of the strip is pressed against the surface of the channel and the recess forms a bulge 20 on the side 20. Like punches 1-5 the shaping device 10 can move horizontally because it is guided in guides and movable by means of the cylinder device 30, 31.

as further shown in Figure 5, the cutter 11 includes a blade 62 attached to the Compression Plate 42. The blade 82 cuts the strip 12 vertically against the abutment 83. The cutter can also move to follow the tape.

it will be seen from Figures 1 and 2 that in this case the profile former 865929 forms six pairs of rollers 84 for each strip 85. These rollers are driven by a chain system 86 connected to the motor 87. The rollers are arranged so that the upper part of each pair the roller rests only against the other side of the strip formed during rolling, namely against the side or half 18 which does not have fastening strips. In contrast, the lower rollers lean against both sides and support the strip. As can be seen from Figure 1, sequential rolling takes place in the usual way, because the upper rollers are located deeper inside the lower rollers at the end of the device than at the beginning. In this case, the pairs of rollers are adapted to pull or feed as a strip from the warehouse 6.

The printing station 8 located before the rolling station 9 comprises two rollers or rollers 88 provided with a collar for pressing the stiffening groove 17 into the strip. The rollers 88 can preferably be operated with the same chain system 86 as the profile rollers 84.

According to a preferred embodiment, the described hardware is program-distributed. The most essential details for providing program control are shown in Figure 6. Thus, the apparatus includes program device 89 connected to impulse transmitter 91 by electrical cables 90. This in turn is connected to each punch 1-5, shaping device 10 and cutter 11 by electrical cables not shown in the drawings. a replaceable cylinder 92 having a jacket surface provided with rows of protrusions 93 and a box 95 fitted to the support 94 with a plurality of switches 96 fitted to each row of protrusions. The protrusions 96 are arranged in patterns that form a predetermined program and are adapted to act on the Switches 96 as the cylinder rotates and to rotate them to determine the desired operating time. Each row of protrusions and its associated switch controls one device, e.g. a punch. The cylinder 92 is removably mounted on a rotatable shaft 97 mounted on supports 94 and 98. The shaft has an adjusting wheel 99 to drive it. The adjusting wheel 99 can be moved along the shaft by means of a holder 100, which in turn can be moved along the guide beams 101 by means of a screw 102. The circumference of the adjusting wheel 99, previously coated with rubber, is in frictional contact with the conical drum 103, which in turn is in communication with the feeler wheel 105 via a bogie transmission 104. This is adapted to protect the strips 12 and to feel their feed rate. Said axle 93, like the guide pins 101, is arranged parallel to the side line of the conical drum to cause the wheel 99 to move without ee escaping frictional contact with the drum cover. It will be appreciated that the feeler wheel drives the guide cylinder 92 via the gears 104, the adjusting wheel 99 of the drum 103 and the shaft 97. It is also clear that the rotational speed of the cylinder 92 can be increased at a constant belt feed speed by moving the adjusting wheel toward the wider end of the drum 103, whereby the adjusting wheel 99 will rotate at a higher speed due to the higher circumferential speed of the drum 103. When a lower rotational speed of the cylinder is desired, the opposite procedure is followed.

The hardware described above operates as follows. The motor 87, which drives the rollers 84 and which may be an electric motor, is adjusted, for example, by a potentiometer to a constant operating speed. In this case, the strips as the feed for the rollers 84 are fed from the warehouse 6 through the racists, the printing rollers, the profile rollers, the shaping device and the cutter. Feeding through the shaping device 10 and the cutter 11, which are located after the profile rollers, is possible due to the considerable rigidity of the strips. In this case, it is quite sufficient to feed the strips only by means of profile rollers, although, of course, mold feeders can also be used. As the belts 12 move, the feeler wheel 105 rotates at a certain constant speed, so that it drives the program cylinder 92, so that this obtains a speed which depends on the feed rate of the belts and on the adjustment of the adjusting wheel 99 relative to the conical drum 103. The protrusions 93 act as the cylinder rotates on the Switches 96, which transmit pulses to the various devices 1, 2, 3, 4, 5, 10 and 11 via the pulse transmitter 91.

Reference is now made again to the punch shown in Figure 3. When this punch receives an output impulse from the impulse transmitter 91, the latch 33 is released, fluid flows into the cylinder 37, whereby the pressure plate 42 moves downwards and the support piece 49 engages the strips due to the turning of the arm 51. Simultaneously with this, the piston rod 30 is caused to move inside the cylinder 31 at substantially the feed rate of the belts, whereby the entire housing 26 follows the belts as they move. Thanks to this movement accompanying the strips, no relative movement takes place in the longitudinal direction of the strips between them and the punching members, as a result of which the punching is performed as correctly and well as if the strips and punch were in place. When the stamping member has completed its work and the fastening strip, the hole 10 65929 or the notch has been made, the press plate, the support piece and the ho *. ·, Lo pal: .open to their initial positions, after which the latch 33 is brought into the calving position.

This phase is controlled by limit switches. Thereafter, the job cycle is repeated depending on the program in program cylinder 92.

After the strips have passed through the various processing equipment, they are formed into finished reinforcements suitable for different boxes or containers. In one, two or all of the punches 1-3, fastening strips are formed at regular intervals from each other. These dies work together in that the speeds or strokes per unit time, which depend on the feed rate of the strips, give the most even distribution of the fastening strips possible. Thus, for example, in the case of the first punch 1, this is made to be punched twice, while the second punch 2 and the third punch 3 are punched only once at a time. In this respect, the possibilities for variation are almost limitless. In the fourth Meist 4, elongated holes 15 are punched. The mutual spacing of these holes naturally depends on the future use of the reinforcements, i.e. how many transverse or other reinforcements are joined together with the other reinforcement when assembling the container. The cycle of the punch and thus the distance between the holes is controlled by one row of the projections of the program cylinder 93. In the fifth punch 5, notches 16 are punched to bend the reinforcement. Also, the 5 cycles of the punch are controlled by one protrusion row of the program cylinder, whereby the mutual spacing of the notches becomes predetermined depending on the desired edge length of the reinforcement. As the strips pass through the printing station 8, the stiffening grooves 17 are pressed. In the profile former 9, a V-shaped cross-sectional profile is formed in the strips. In the shaping device 10, bulges 20 are formed in the strips. Finally, the strips are cut to the desired length in the cutter 11. The hand-made reinforcements can be removed from the cutter to an assembly table which is emptied at the desired moment.

The length of the reinforcements can be varied by adjusting the adjusting wheel 99 relative to the conical drum 103. If long reinforcements are desired, the adjusting wheel is placed near the thinner end of the rum, whereby the program cylinder 92 provides a relatively low rotational speed. It follows that relatively few working pulses enter the cutter 11 and a relatively large length of strips running at a constant feed rate has time to pass through the cutter before cutting. On the other hand, if the wheel 99 is placed near the thicker end of the drum, short reinforcements are obtained, whereby the cutter will operate at the shortest 11 time intervals. 6 5 92 9

Of course, the invention is not limited to the embodiment described above and shown in the drawings. Punching means other than those shown in Figure 7 may also be fitted to the apparatus. On the other hand, it is also possible to disconnect one or more punches or shaping devices, e.g. a fourth punch 4 and a shaping device 10, from the exemplary apparatus if the reinforcements are not connected to other reinforcements. If direct reinforcements are desired, disconnect the Fifth Punch 5 · It is still, of course, possible to use different devices other than pneumatically or hydraulically, although the embodiment shown is very advantageous. The profile-former 9 does not necessarily have to be formed by rollers, but can be formed by fixed, supportive guide members which compress the strips into a V-shape. Many other variations are also possible within the scope of the inventive idea.

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Claims (8)

A machine for making containers intended for containers of the kind having projecting attachment tabs (13 ', 13 ", 13'") which are retractable in the walls of the containers, including a stock (6) for the belt (12), two or more in the direction of the strip with spaced apart punching means with punching means (70) to achieve a desired punching pattern or pattern group in the band through the cooperation of these punching devices or to punch out at least said fastening tabs from the band and a cutting device (11) for cutting off the tape into brackets of the desired length, characterized in that the punching devices (1, 2, 3), which in a known manner are movable forward and eat in the longitudinal extension of the tape (12) for accompanying the belt on one side during continuous feeding of this from the stock (6) towards the cutting device (11) at the same time as the punching means intersect the belt and on the other side after the punching has been restored to an expense. In addition to the work movement, in addition to the work movement, parallel movements are also controllable independently of one another as separate punching devices to change the pattern or distance of the punches without changing punches, and that a programmer device (89) is arranged to control the working movements of the different punching devices (1, 2 , 3) depending on the desired number of fastening tabs (13 ', 13 ", 13'") per unit length of the belt (12). Machine according to claim 1, characterized in that the different punching devices (1, 2, 3) have different numbers of punching means (70) from one and the other. Machine according to claim 1, characterized in that each of the punching means (1-3) comprises partly fixed upright punching means (70) and a pad (71) located above the punching means, the punching means being arranged to penetrate the band (12). and penetrating recesses (72) in the cushion in the direction from below and upwards during punching of the strip upwardly directed fastening tabs.