DE1203109B - Machine for erecting and fixing flange parts on cardboard containers - Google Patents

Description

Machine for erecting and fixing flange parts on cardboard containers Machines for folding parts of cardboard containers or for erecting cardboard containers are known.

In making and using reusable containers for heavy loads, made of cardboard and fitted with flanged lids it has generally been the practice to use the flanges on the lids in the manufacturing plant to form the container. This is especially the case with containers that are made from very large made of strong, sturdy fiberboard and intended for frequent reuse are. The stiffness of the paperboard makes it difficult for the user to secure the lid flanges to be folded and fixed by hand. For this reason, the cover flanges are in Vessel manufacturing plant established where heavy equipment is available is. However, this has the disadvantage that the container in the shipping and the storage are bulky, and even if the actual container body is collapsible is executed, the folded blanks are with the erected cover flanges inconvenient to handle, transport and store.

The purpose of the invention is therefore for the container user to create an automatic machine by means of which one or more cover flanges a container made of cardboard can be erected and set.

The invention is based on a machine, at least for erecting a lid flange on a container made of resilient cardboard, wherein the flange consists of a main section on the end face, and the one that has already been folded onto one another and formed in the middle part by adhesive interconnected lid flaps is, and consists of end flanges, the corner tabs between the adhesive-free Outside parts of the flaps are stapled. This machine is characterized according to the invention through a folding and stapling station and a conveyor with along its path arranged guides for the cover and at least one stop for correct position Arranging the containers in the station, their folding device from a reciprocating motion Rail and a swiveling abutment that interacts with it for erecting of the flange and its corner tabs and another two-dimensional pivotable Has folding tool for the end flanges and with a pin for spreading the External parts of the main flange is provided, and their stapling device over the erected Flange is pivotable, as well as characterized by a time adjusting device for the hydraulic control of the tools of the folding and stapling station as a function of the attack.

The invention provides a machine that is used by the user of heavy-duty containers Made of sturdy fiberboard can be used to conveniently fit the lid flanges in quicker and efficiently erect and erect the containers quickly on ordinary production lines or to arrange conveyor lines while feeding collapsed containers in proportion flat compact shape, which kept storage problems to a minimum will.

The machine according to the invention is intended in particular to Assemble flange parts on a rectangular cardboard cover, which runs along a Side has a flange from a position in which it is in the plane of the main portion of the lid is in a raised position relative to the Inside of the main portion of the lid can be folded. The lid has End flanges which carry short corner tabs that are folded into position can, in which they are essentially in the plane of the first-mentioned flange so that they can be attached to such a flange. In their preferred Embodiment, the machine is provided to the corner tabs between two adjacent Define sections of a main flange of double thickness of the cover. In this Case, the sections of the flange are double thickness on a sizeable basis Part of their length in their middle parts together attached, while their end portions are left unattached to receive the corner tabs. the Machine has means for moving the unsecured flange parts apart, to be able to insert the corner tabs. These funds show in their preferred Embodiment a movable spreading finger, which is arranged in such a way that it enters an opening formed on one of the flange portions to Apply pressure against the other flange section to make this section sufficient to move that the adjacent corner tab is inserted between the flange sections can be.

The machine described has a conveyor to partially completed To move the container to a processing station. In those arranged on the conveyor erected container can, if desired, a template or a mold be arranged around its walls in a rectangular state and thus those on the opposite one Lid hinged to the side walls in a fixed precise relationship with the processing device to keep. When the container is advanced towards the processing station is, the covers are in a suitable manner in an extended or unfolded Position transferred. When the desired point is reached, the container is through stopped a sliding stop. At the same time, the conveyor stops one switch open and another switch closed to run a motor to set which one camshaft to control the subsequent work processes drives. The essential work processes consist of folding heads or folding elements on the main sections of the lid to move down while the main flanges double thickness are held against stationary elements to cause the flanges are folded up when the main sections of the lid are after be pressed down. While the main sections of the lid continue in a fixed position are held, the double thickness flanges are held by auxiliary folding devices folded a little further inwards. Through the flange sections provided with openings spreading fingers move through which the end parts of the flange sections move each end of each lid apart to insert the corner tabs. Folding elements pivot the corner tabs located on each outer corner of the cover up and while holding the corner tabs in this position, pivot additional folding elements up the end flanges, causing the Corner tabs are inserted between the spread flange sections. The splay fingers are then withdrawn and staplers are in position on one Side of the flanges of double thickness pivoted, with anvil parts od. Like. Against put the other side of the flange. Then staples or the like are driven in, the staplers pivoted back, the organs for folding the end flanges and the auxiliary members for folding the double-thickness flanges into their inoperative position returned, raised the elements for folding the main sections of the lids and the stops for the container are released to prevent the container from moving forward to enable, after which the conveyor removes the finished container from the processing station moved away. Then another container is moved into the processing position, to continue the cycle of operations.

An embodiment of the invention is shown below with reference to the drawings for example explained.

F i g. 1 is an end view of the machine as seen from its pick-up end; wherein a container with hinged opened lid is shown, which in position for initial machining by the machine; F i g. Figure 2 is a cross-sectional view taken along line 2-2 of Figure 2. 1, being a container is reproduced in the direction against the station for processing the lid is advanced; F i g. 3 is a partial sectional view on an enlarged scale according to line 3-3 of FIG. 1, with details of certain working parts reproduced are; F i g. 4 is one on the same scale as FIG. 3 vertical sectional view held after line 4-4 of FIG. 3, with the parts folding the flange in the open position and a container lid located between these folding parts are shown; F i g. 5 is a partial side view with parts broken away; the device for processing the cover flange, seen from the side which of the in F i g. 3 is opposite or according to FIG. 1 of the seen left side; F i g. 6 is a horizontal sectional view taken along line 6-6 the F i g. 3; F i g. 7 is a fragmentary perspective view showing one of Lid is reproduced after a first folding operation has taken place; F i g. Fig. 8 is a fragmentary perspective view showing how the lid flange is shown in an inwardly inclined position relative to the main portion of the lid and the corner flap is folded up on the end flange and between the flange sections can be introduced; F i g. 9 is a partial view in which the inner portion of the cover flange is shown shifted inwards to the flange sections to move apart to accommodate the corner tabs; F i g. 10 is a fig. 7 and 8 are fragmentary perspective views similar to those showing the folding of the end flange Disk is reproduced in the raised position after being pivoted upward has been to cause the corner flap in the space between the apart Flange portions is inserted; F i g. 11 is a partial vertical sectional view; in which it is shown how the corner flap attaches to the sections of the flange double thickness when held between these sections.

F i g. Figure 12 is a perspective view of a container of the type for which the machine according to the invention is intended; F i g. Figure 13 is a fragmentary view showing the corner portion of the container lid prior to folding the blank; F i g. 14 is one of the Figs. Fig. 13 is a view similar to Figure 13 in which the portions forming the flange have been folded up and secured to one another, e.g. F i g. Figure 15 is a partial end view of one of the completed covers showing the corner tab tacked between the sections of the double thickness flange; F i g. Figure 16 is a partial view of the container advancement stop located on the take-up side of the machine; F i g. 17 is a circuit diagram.

As shown in the drawings, the machine is supported on appropriate horizontal and vertical base parts 10, 11 and 12. Extending longitudinally of the base is a conveyor 13 which, if desired, can be a portion of a relatively long conveyor to accommodate a substantial number of erected containers C which can be fed to the lid processing station. On the sides of the conveyor 13 processing units 14 and 14 a are provided, which process two opposite container lids at the same time. Each processing unit 14, 14a is provided to process both ends of each cover at the same time.

The machine shown and described can be adjusted to work with containers of different heights, lengths and widths. To adjust for containers of different heights, the frame of the conveyor 13 can be raised or lowered. To adjust for containers of different length two parts of the processing units 14 and 14 are a separately performed on an equal basis, so that the two parts of each unit 14, 14 a to each other as desired can be moved away from each other or not. To adjust for different widths, the base frames of the units 14 and 14a can be moved laterally and evenly towards or away from the center line of the machine.

A container for which the machine is particularly intended, is shown in Figs. 12 to 15 shown, and it can advantageously consist of a single Be cut from solid fiberboard and have side walls and end walls, which are fastened to one another in such a way that a hose-like design is obtained will. In addition, the outer flange portion is preferably on the inner flange portion attached, as shown in FIG. 14 is indicated. The containers can thus be level collapsed form produced and given to the user in this form.

In Fig. Figure 12 shows a finished container after machining in the machine according to the invention. As stated above, the end walls 17 are attached to one another in such a way that a hose-like design is obtained. To the upper edge of each side wall 16 is hinged a lid which has a main portion 18 and a double thickness flange formed by narrow portions 19 and 20 which are attached to one another over a considerable part of the length of their central parts, for example by means of adhesive, such as it in Fig. 13 is indicated by the dotted area. The outer parts or end parts of the double-thickness flange are left unsecured, and in the area left unsecured , an opening 21 is formed at the ends of one of the flange sections 19, 20, in the example described in section 19, in order to allow the flange sections 19, 20 to facilitate the insertion of the corner flap. At the ends of each cover end flanges 22 are provided, each of which carries a corner tab 23 which is inserted between the unsecured ends of the flange sections 19 and 20 and held by staples 24 or the like, which are held by the flange sections 19, 20 and the corner tab 23 (Fig. 15). The container blank is suitably folded in the usual manner to facilitate the folding of the various sections, flaps and flaps. When the container is formed from a one-piece blank, four bottom flaps are provided, one on each side wall 16 and one on each end wall 17, and these flaps are attached to one another in an overlapping relationship to close the bottom of the container.

As shown in Figs. 1, 2 and 4 indicated in broken lines, a container C is fed to the processing station of the machine, while all sections and tabs of each cover lie in a common plane, with the exception of the flange section 20, which, as shown in FIG. 14 is shown, folded over and attached to the flange portion 19. Before the container C is advanced through the machine, a template or mold 25 can be inserted into it. In practice, the bottom flaps of the container C are brought into their closed position before the mold 25 is inserted. The Conveyor The conveyor 13, as best shown in FIGS. 1 and 2, an endless belt 27 of conventional shape, which runs over end rollers 29 which are arranged in longitudinally extending channel-shaped supports 30 , which in turn are fastened to upright frame parts 31 carried by transverse parts 32. At the ends of the cross members 32 internally threaded blocks 33 are provided, in which vertically arranged threaded rods 34, 34a are received, each of which is rotatably received in upper and lower bearing arms 35, 35a and 36, 36a, which are attached to the vertical base frame parts 12 are attached. By turning the threaded rods 34, 34 a, the conveyor 13 can be adjusted in the vertical direction.

In order to rotate the threaded rods 34, 34a together, sprockets 37 are keyed onto the threaded rods 34, 34a at opposite ends of the machine. An articulated chain 38 runs over each pair of chain wheels 37. 1 are arranged on the left, each have a shaft extension which is connected to a horizontal, longitudinally extending shaft 39 by means of bevel gears housed in a gear box 40 (FIG. 2). The shaft 39 can be rotated by a short shaft 41 which is connected to the shaft 39 via bevel gears 4 housed in a gear box 42 (FIG. 1). The shaft 41 can be rotated by a crank 43 arranged on a short shaft 44 , and the shaft 44 is mounted in a bearing arm 45 and is connected to the shaft 41 via toothed wheels and a chain 46 .

On the sides of the conveyor belt 27, upright guide rods 49 are provided which are fastened to supports 50 extending in the vertical direction. The supports 50 can be moved symmetrically towards or away from the center line of the conveyor 13, and for this purpose they are provided with projections 51 which are internally threaded and extend through openings formed in the channel-shaped supports 30. The threads in the projections 51 are opposed and receive the opposite ends of rods 52, 52a which are opposedly threaded. The rod 52 is provided with a hand crank 53 at one end and a sprocket 54 at its other end. A sprocket 54a is attached to the threaded rod 52a, and it is driven by a link chain 55 running over the sprockets 54 and 54a. By turning the crank 53, the operator can bring the guide rods 49 into the desired position in order to guide a container C precisely into the processing station.

Guide rods 58 are provided on the sides of the conveyor 13 to guide the container lids into position. The attachment of these rods 58 will be described later. Folding and fixing the flanges The elements for folding and fixing the flanges are arranged in pairs of sub-units, each designated as a whole with 59a, 59b or 59 aa and 59 bb, each sub-unit being part of the processing station. The pairs of sub-units located on opposite sides of the conveyor can be moved in and out laterally to accommodate containers of different widths. The sub-units 59 a and 59 aa are arranged in such a way that they can be quickly adjusted in the longitudinal direction of the conveyor 13 in order to adapt to containers of different lengths. The subunits 59 b and 59 bb are fixedly arranged.

Each side part, which consists of two sub-units, is arranged on the longitudinally extending gesture parts which are fastened to the vertical base frame parts 12. The base part 60 of the subunit 59b, which is shown on the right-hand side of FIG. 2 and the base part 60 of the sub-unit 59 bb are arranged in a generally fixed position on the base frame parts. The base parts 61 of the adjacent sub-units 59a, 59 aa are relatively adjustable in the longitudinal direction of the conveyor 13. Each set of the two base parts 60 and 61 is movable laterally as a unit towards and away from the conveyor 13. For this purpose, bearing arms 62a and 62 which protrude downward are attached to the lower parts of the base parts 60 and 61. These arms 62a and 62 carry projections 63a and 63 which have threaded openings in order to be able to receive threaded rods 64a and 64, respectively, which are arranged in bearings and by means of one on the right-hand side of FIG. 1 reproduced hand crank 65 are rotatable (FIG. 1). In order to be able to rotate all threaded rods at the same time, chain gears 66 and 67 are attached to the shaft parts of the threaded rods 64 a and 64. These sprockets 66, 67 can be driven simultaneously via link chains and an appropriate gear (not shown). The particular mechanism by which a synchronous adjustment of the various parts is obtained is of a common form and does not form part of the invention.

The sub-units 59 a and 59 aa are preferably arranged in such a way that they can be adjusted in the longitudinal direction relative to the relevant sub-units 59 b and 59 bb. For this purpose, a horizontal plate 20a of each of the sub-units 59 a and 59 aa is arranged on the base part 61 in such a way that it can be moved parallel to the conveyor 13. On these horizontal plates 70a, upstanding flanges 71 and 72 are provided, which support additional parts to be described below. At the bottom of the plate 70a and the plate 70 of the subunit 59 b b are box-shaped guide parts 73 a, 74 a and 73 b, 74 fixedly b attached, having apertures are in which recorded longitudinally extending guide rods 75 and 76 ( Fig. 1, 4, 5 and 6). The rods 75, 76 serve as support parts for guiding the sub-units 59 a, 59 aa when they are brought into different positions. As shown in Figs. 5 and 6 reproduced, the box-like guide parts 73 a, 74a, 73 b, 74 b are provided with openings between the guide rods 75, 76 to receive a threaded rod 77, the thread of which extends over more than half its length. A fixed in the guide part 74 a, provided with an internal thread sleeve 78 receives the rod 77 so that the sub-unit can be adjusted by turning the threaded rod. The rod 77 can be rotated by hand by a crank 79 (FIG. 1).

The machining devices on each sub-unit are essentially the same with the exception of the devices of sub-units 59 a and 59 aa which are intended to machine end flanges 22 and corner tabs 23 and which are present with respect to the corresponding ones in sub-units 59 b and 59 bb Devices are arranged reversed. In order to simplify the description, only the sub-unit 59a is described in detail, which is shown in FIG. 4, on the left of FIG. 1, 2, 3 and 6 and on the right hand side of FIG. 5 is shown.

The mechanism of the sub-unit 59 a has a guide rod carrier 85, a part 86 for folding and clamping the cover, an element 87 for folding the main flange of the cover and the corner tab 23, a finger 88 spreading the flange, an element 89 for folding the end flange 22 and a stapler 89. In addition, a retractable stop 91 can be arranged in front of the sub-unit 59 a in order to hold the front container C, which is next to be advanced to the processing station, and two retractable stops 92 and 92 a can be assigned to the sub-units 59 b and 59 bb to keep the container C being processed in proper relation to the processing devices. Execution of the guide rod The container C to be processed can be fed in certain finishing lines or conveyor lines from a section of the conveyor on which the flaps for closing the bottom have been attached and the not yet finished covers are folded down and held against the side wall on which they are attached. When the containers are advanced by this conveyor section and the unfinished lids pivot outward due to their resilience, they come to a level at which they come into engagement with the upper side of the outwardly inclined sections 58a of the guide rods 58 (F i g. 2). When the container C is moved further in the direction of the processing station, the lids are raised to an upwardly inclined position, which is shown in FIGS. 1 and 4 is reproduced. In order to be able to adjust the guide rods 58 to different heights or widths of the containers, a short rod section 58 b is attached to the guide rod 58, which is held displaceably in guide openings which are formed in projections 58 c, which are located on the upper end of a frame 58 d , which has a Y-shape and is attached to the base part 61 . The end of the guide rod 58 extends to a point at which the rear part of the cover is still supported by the guide rod 58, while the front edge of the cover is supported by the folding elements to be described below. Folding and clamping of the lid in FIG. 4 the cover is shown at a point at which it can slide off the end of the guide rod 58 so that the cover can pivot downwards for the preliminary folding of the double-thickness flange. After the container has been moved past the point at which the lid leaves the guide rod 58, the front end of the container meets the stops 92 and 92 a, which prevent further forward movement of the container. At the same time, the fingers of a switch 93 arranged on one of the stops 92, 92a as part of the device for controlling the flow of current in an electrical circuit are actuated. The drive for the conveyor belt 27 is preferably interrupted at this point and a controlled sequence of operations is started, by means of which the flange parts on the covers are folded and fixed, after which the stops are withdrawn and the conveyor is put back into operation move away the finished container to be processed. The details of the construction and operation of the stoppers and electrical controls will be described later.

When the stops are held in the stop position and the pre-woven cover comes free from the end of the guide rod 58, the processing by the folding and clamping element can begin. As shown in Figs. 4 and 7, the frame part 71 carried on the plate 70a has a protruding bearing arm 86a which is provided with a flat upper surface which is arranged approximately at the level at which the main flange of the cover is flat on this bearing arm 86a hangs up. A horizontal, vertically movable arm 86 b carries at its end a folding and clamping element 86 e, which has a flat lower surface which lies on the main section of the cover and holds it against the upper surface of the bearing arm 85 a. The arm 86 b has two apertured projections 86d on, 86e which receive vertical guide rods, and between the projections 86d, a piston-rod is attached 86f, the piston moves in an upstanding cylinder 86g, the bottom at its end on the Plate 70a is attached (Fig. 5). The control of the pressure medium supply to the piston will be described later. The operation is such that the clamping element is brought into its lower position and held firmly against the main portion of the lid while the flanges are being secured.

Centering guides 59 c and 59 d are provided on the clamping elements in order to move the cover somewhat if it is not in exactly the right position when the clamping elements are lowered. The guide 59 c is attached to the clamping element for the sub-unit 59 a, and the guide 59 d is attached to the clamping element for the sub-unit 59 b (FIG. 3).

As best seen in Fig. 7, causes the lowering of the clamping element, that the double thickness flange rests against the upright surface of the element 87 sets which holds the flange in place. This element 87 is general wedge-shaped and has an upper rounded surface that turns into an upright Surface transitions. Another surface section of the element 87, denoted by 87a serves as a guide for the corner bracket 23 and will be described later.

As soon as the clamping element 86 reaches its lowest position, the member 87 is preferably pivoted against the double thickness flange about it to fold beyond a plane leading to the main portion of the lid in the right Angle and runs obliquely against the lid hinge, as shown in FIG. 8 reproduced is. It should be noted that the corner flap 23, as shown in FIG. 7 shown, partially upwards and continues to be folded against the lid hinge to approximate in the lie on the same plane as the double-thickness flange.

For the purpose of pivoting the element 87, it is arranged on a pivot pin 87b which is supported in bearing arms 87c. Two rods 87d rigidly attached to the element 87 extend downward and are connected to one another by a transverse rod 87c. A piston rod 87 f, which carries a piston moving in a cylinder 87 (FIGS. 4 and 6), is articulated to the cross rod 87 e. The control of the pressure medium supply to the cylinder 87g will be described later. The operation is such that the member 87 is held in its pivoted position while the corner tab 23 is inserted and secured between the sections of the double thickness flange. As shown in Figures 7 and 8, and the element 87 keeps both the double-thickness flange and the corner flap 23 in the same plane, the spreading finger 88 is passed through the opening 21 in the flange portion 19, as shown in FIG 9 is shown, and the finger 88 rests against the non-attached part of the section 20 and pushes it away from the section 19. The spreading finger 88 can be formed in various ways, but it is preferably an extension of a piston rod 88 a, the piston of which is movable in a cylinder 88 b, which is provided on one of the frame parts 71 and 72 Plate is arranged in a fixed position. The element 87 arranging the flange has a central portion which is cut out in an appropriate manner in order to allow free access of the spreading finger 88 to the flange portion (FIG. 9). The control of the pressure medium supply to the cylinder 88b will be described later. The mode of operation is such that the spreading finger 88 is held in its advanced position until the corner tab 23 is inserted between the flange sections 19 and 20 which have moved apart. It should be noted that the spreading finger 88 is effective at a sufficient distance from the end of the double thickness flange so that it does not interfere with the insertion of the corner tab 23. Insertion of the corner flap While the parts of the mechanism in the FIG. 8 are held positions shown, with the spreading finger 88 is in its advanced position, which is shown in FIG. 9 is shown, the element 89 for folding the end flange 22 is pivoted upwards. At the same time, the corner tab 23, guided by the guide surface 87a, which is formed on the element 87, moves along the edge into the space between the flange sections 19 and 20. To pivot the switching element 89, it is hinged at its lower edge to a hinge pin , which is held in bearings 89 a, which is provided at the end of the bearing arm 86 a supporting the cover. A slotted arm 89 b is rigidly attached to the folding element 89 at an angle of slightly more than 90 ° (FIG. 10). The slotted arm 89b is pivoted by means of a piston rod 89c, the piston of which is movable in a cylinder 89d. 89c at the end of the piston rod a U-shaped connecting member is attached 89 e, which receives the arm 89 b between its legs, and at the upper ends of the legs of a b in the slot 89 of the arm recorded pin is fixed. When the folding element 89 is in its lower position, which is shown in FIGS. 7 and 8, the pin held in the U-shaped connecting element 89 e is located near the upper end of the slot in the arm 89 b. When the piston rod 89 c is extended or advanced, the pin moves in the connecting element 89 e along the slot so that it pivots the arm 89 b. The control of the supply of pressure medium to the cylinder 89d will be described later. The operation of the piston rod 89 c is such that it is held in the extended or advanced position until the corner bracket 23 is fastened between the flange sections 19 and 20.

After the corner tab 23 has moved into the space between the Sections 19 and 20 is inserted, the spreading finger 88 needs the end of the section 20 no longer to be kept away from the flange section 19. The splay finger will therefore be withdrawn at this point in time.

Securing the Corner Flap As soon as the spreading finger 88 is withdrawn, the stapling device 90 is pivoted into its working position with respect to the flange of double thickness (FIGS. 3, 4, 5 and 11). The stapling device 90 has a mechanism accommodated in a housing 90 a for attaching or driving in a staple or the like and a standing anvil 90 b which is movably attached to an arm 90 c bolted to the housing 90 a. From a comparison of FIGS. 4 and 11 it can be seen that the stapling device 90 can be swiveled back and forth in an angular range of approximately 50 °, so that it remains in its inoperative position outside the area through which the cover section is moved. In their operative position, the staple driving head and anvil 90b closely engage the double flange prior to application of the staple. Except for its location, the stapler 90 is of conventional design. A spool of flat wire is appropriately supported in a protective housing, and the wire is fed from the spool into a mechanism which bends the wire, cuts it and pushes it through the cardboard. The staple driving mechanism has a suitable single-revolution coupling which is intended to be brought into engagement immediately after pivoting the device 90 into the desired position in which the double flange is encompassed. The mechanism that drives the staple is driven by a suitable gearbox, which is actuated by a shaft 90d, which is mounted in a fixed bearing block 90e, which in turn is attached to parts carried by the frame parts 71 and 72 (Fig. 5 ). The shaft 90d carries at its outer end a belt drive wheel 96 over which a belt 97 runs, which also runs over a drive wheel 98 arranged on a shaft 99, the shaft 99 being driven by a motor arranged on the base frame. The power transmission from the motor to the shaft 99 will be described later.

The bearing block 90 e has an outer bearing surface 100 on which the housing 90 a of the stapling device 90 is pivotably arranged. A frame part 90 f fastened to the housing 90 a has an inner bearing surface 101 , and ball bearings 102 are located between these two bearing surfaces.

In order to be able to pivot the stapling device 90 , a bearing arm 103 is bolted to the rear part of a bearing block 95 (FIG. 4). A vertical link 104 connects the arm 103 to an arm 105 which is fastened to a piston rod 106, the piston of which can be moved in a cylinder 107. Upward movement of the piston rod 106 (FIG. 5) causes the stapling device 90 to pivot into its position in FIG. 11 reproduced working position. The control of the pressure medium supply to the cylinder 107 will be described later. The mode of operation is such that the stapling device 90 is pivoted into the working position after the spreading finger 88 has been withdrawn. After reaching the position of the stapling device 90 in which the double flange is encompassed, a staple is driven through the flange portions and the corner flap 23 enclosed by these, and the stapling device 90 is immediately thereafter pivoted back into its inoperative position. Upon movement of the stapler 90 to the inoperative position, the flange locating member 87 and the end flange 22 folding member 89 are returned to their original position and the clamp member 86 is moved to the fully raised position. The completed lid is now free of the processing device and the retractable stops 92, 92a are withdrawn from the path of travel of the container and the conveyor 13 is operated to move the container out of the processing station.

In order to enable the sub-units 59 a and 5 9 aa with respect to the sub units 59 b and 59 bb can be easily adjusted without a time-consuming re-setting the belt drive wheels is required, the shaft is grooved 99, so that the drive wheel along 98 the shaft 99 can slide and still remains permanently in the working position. Bearing arms 110 a are attached to the base parts 73 in the sub-unit 59 a , and bearing arms 110 b are attached to equivalent parts in the sub-unit 59 b. A drive wheel 112 is fastened between the bearing arms 110b and is driven via a belt 113 by a drive wheel 114 fastened on a drive shaft 115 (FIG. 2). This drive shaft 155 is appropriately supported in the base frame and is driven by a motor 111 which is also arranged on the base frame. The motor runs constantly while the machine is working and drives the input part of a clutch 111 a, which executes a single revolution and is actuated by an electromagnet. The output part of this coupling 111 a can be attached to the end of the shaft 115 . The control of the clutch 111a will be described later. The Retractable Stops The retractable stops 92 and 92a are similar as shown. They are guided in the horizontal direction and operated by a piston-cylinder mechanism. According to FIG. 6, the stopper 92 is preferably a flat plate with an upwardly directed front flange 92 b and a bolted with a block 92d side flange 92 c on. D on the rear face of the block 92, a guide rod 92 are fastened e and a piston rod 92f. The guide rod 92 e is displaceable in a part 92 g which is fastened to the base part 61 , and the piston rod 92f carries a piston which is movable in a cylinder 92h which is also carried by the base part 61 . The control of the pressure medium supply to the cylinders of both stops 92 and 92a will be described later. As mentioned above, the mode of operation is such that, as soon as the container is free from the clamping elements 86, the stops 92, 92 a are withdrawn and the conveyor 13 is then put into operation in order to advance the finished container.

The front flange of each stop 92 and 92a is preferably such as in Fig. 6 shown, cut out to the working finger of one on the adjust flat plate part of the switch attached to the stop. At this point a single switch is sufficient and it can be switched on either of the two as desired Attacks are arranged. In the example described, only the Stop 92 uses a switch.

The stop 91 (Fig. 2, 16), which can be referred to as a stop for limiting the forward movement, is arranged on the input side of the processing station at a distance from the processing parts which is greater than the length of the longest container for which the mechanism is provided. This stop 91 can be identical in design to the stop 92. The working parts have a guide rod 91b, which is received in a guide 91c attached to the base frame, and a piston rod 91d, the piston of which is movable in a cylinder 91e. A switch 91 f having a switch actuating finger 91 g is arranged on the stop plate in a position such that an advancing container coming into contact with the stop also engages the switch finger to operate the switch. The control of the supply of pressure medium to the cylinder 91c will be described later. The operation is such that the stop 91 is withdrawn to release the path of movement of the container so that it can be advanced towards the processing station when the finished container leaves this station.

The machine described can with a conveyor and a Feeding device for a number of unfinished containers arranged end to end are used, and these devices have controls for disconnecting the front container from the row of containers and dispensing this container into one position in which it lies against the stop 91. The remaining row is contiguous Container advances the length of a container in practice. The normal one Operation includes intermittent work of the conveyor 13 to the completed To move the container away from the processing station, moving the container from the stop 91 is temporarily held, moving both the stop 91 and the Stops in the processing station in the path of movement of the container and stopping of the conveyor 13 after the containers come into contact with the respective stops came. The separation or segregation of the front container from a funded one Series of contiguous containers can be in various ways mechanically or by Hand run. This feature does not form part of the invention.

After the clamping elements 86 have been moved upwards to release the cover, the three stops 91, 92 and 92 a are withdrawn and the conveyor 13 is put into operation. As a result, the finished container is moved beyond the processing station and the container previously held by the stop 91 is moved towards the processing station. After these two containers have moved beyond the stops, the stops are again brought into the path of movement of the incoming containers. Control of work In FIG. 17, reference numeral 120 denotes a time setting device which has a shaft suitably mounted on the machine. This shaft is rotated by a small motor 121 via appropriate gears 122, 123.

On the shaft of the timing device 120, a number is smaller Arranged cams that can be adjusted in angle in a known manner. Everyone Cam can operate a dedicated switch in switch boxes are received, protruding from which rods, provided at the ends of trailing rollers that are in contact with the cam surfaces. These rods are spring loaded, so that they rest firmly on the cams, and the various from the rods Controlled switches can usually be open or usually closed switches whichever is most appropriate for the particular control required is.

For the sake of simplicity in FIG. 17 17 a number of individual actuators controlled by the timing device 120 are shown, it will be understood that in practice the switches are connected to the sets of identical units in order to control them synchronously. For example, the pivoting of all four stapling devices is controlled by a single cam switch.

In Fi g. 17 the actuators are in their inoperative positions and the stops 91 and 92 are shown in their advanced position. A Container is in position at the processing station, and a second one The container lies against the stop 91. The conveyor 13 has just stopped been. To simplify the illustration, the stop 92a has been omitted in this figure.

When the containers are in the position in which they abut the stops 91 and 92, the normally closed switches 91f and 93 are held in the open position. These switches 911 and 93 are arranged in parallel with one another and control the flow of current to the motor 28 of the conveyor 13. This stops the conveyor 13 when both switches 91f and 93 are open.

Simultaneously with the stopping of the conveyor motor 28, a circuit for actuating the motor 121 of the timing device 120 is closed. For this purpose, the movable elements of switches 91, f and 93 are connected to the movable elements of switches 125 and 126, whereby these switches are closed when. the switches 911 and 93 are moved to the open position. The switches 125 and 126 are connected in series or in series by a line 127, and they are furthermore connected to a terminal of the motor 121 via a line 128. A line 129 connected to a power source 130 is connected to the other terminal of the motor 121. The circuit is completed by a grounded connection 131 of the power source 130 and by a grounded connection 132 of the switch 125.

The l @ lotor 1.21 is controlled in this way. that the shaft of the Zeaeinstellvorrichtana 120 makes a single revolution and then comes to a standstill. For this purpose a cam switching unit is arranged in an auxiliary circuit for the motor 121. This circuit extends from a grounded connection via line 135 to a connection of the switch box. From the other connection eight a line 136 from which is connected to the line 128 which is connected to a connection of the motor 121 is connected. This auxiliary circuit is created by the line described above 129 completed.

The cam of the unit m has an operating section which is intended to close its switch after the switches 125 and 126 are closed to start the motor 121, and this operating section keeps the switch closed during the remaining angular movement of approximately 350 °. This allows the switch to open after the shaft has rotated 360 degrees under the combined control of switches 125 and 126 and the cam switch.

When a container arrives at the processing station, the first operation is to lower the members 86 holding the lid. These elements 86 are controlled by a cam switch b which is connected via a line 137 to one terminal of the coil of a solenoid valve 138. The circuit is completed by a grounded connection 139 of the electromagnet, a line 140 connected to a power source 141 and a grounded connection 142.

The solenoid valve 138 is of conventional design and its particular design can be modified as desired. In the embodiment described, the valve 138 is shown as a valve which has a single solenoid and a return spring, and in which the valve member is held by the solenoid coil as long as current flows through the coil. When the power supply is interrupted, the valve member is returned to its original position by the action of the spring. When pressure medium is applied to the front of the piston in the cylinder 86g, the clamps 86 move downward against the main portions of the lids.

Since the cover clamping elements 86 in the holding position during rotation the camshaft must be held from about 230 to 240 degrees is the cam the switch unit b with a working section extending at a corresponding angle educated.

The members 87 folding or holding the main flange are actuated after the lid clamping members 86 are placed in position. These elements 87 are controlled by a cam switch unit c which is connected to a solenoid valve 145 via a line 146 and earthed connections 147 and 140. This valve 145 can also be a valve which has a single solenoid and a return spring. When pressure medium is supplied to the front of the piston located in the cylinder 87g, the elements 87 are pivoted towards the cover hinges in order to bring the main flanges into positions in which they stand slightly obliquely above the main sections of the covers. If the movement of the cover clamps 86 is considered to start at 0 °, then the flange folding members 37 are moved inward after about 20 to 25 ° of rotation of the camshaft and returned to their original position after about 200 to 210 °. The cam is designed according to these requirements. The spreading fingers 88 are actuated after the folding elements 87 have pivoted the flanges inward. The advancement and retraction of the fingers 88 is controlled by a cam switch unit f which is connected to a solenoid valve 148 via a line 149 and grounded connections 150 and 140 . Valve 148 is similar to valves 138 and 145. When pressure medium is supplied to the rear of the pistons disposed in the cylinders 88b, the finger 88 of each unit is advanced through the openings in the flange portions to push the inner flange portions away from the outer flange portions attached to them, as described above, to facilitate the insertion of the corner tabs 23. The spreading fingers 88 are advanced after the flanges are in a position corresponding to a rotation of the camshaft of approximately 40 °, and they are retracted after a rotation of the camshaft of approximately 90 ° after the corner tabs 23 between the flange sections 19 which are fastened to one another , 20 have been introduced. The cam of the unit f is designed according to these requirements.

The folding elements 89, for pivoting the short end flanges 22 up and insertion of the corner flaps 23 are controlled by a cam switch unit D, which via a line 153 and grounded connections 154 and 140 connected to a solenoid valve 152nd This valve 152 can be similar to the valves described above. After supply of pressure medium to the front of the piston arranged in the cylinders 89 d, the folding elements 89 are pivoted upwards, whereby the corner tabs 23 are brought into their end position, in which they are held until the staples are attached. The folding elements 89 are pivoted upwards after a rotation of the camshaft of approximately 60 ° and returned after a rotation of approximately 180 ° after the corner tabs 23 are fastened in place. The cam is designed according to these requirements.

The stapling devices 90 are brought into position as soon as the corner tabs 23 are in their end position. As described above, this requires pivoting the staplers 90 to bring the jaws into close relationship with the edge portions of the flanges. The pivoting of the stitching devices 90 is controlled by a cam switch unit e, which via a line 156 and grounded connections 157 and 140 connected to a solenoid valve 155th This valve 155 can be similar to the valves described above. The supply of pressure medium to the rear of the piston arranged in the cylinders 107 causes the stapling devices 90 to pivot into the position in which the staples are attached to the. Flanges are attached and in which they are held until the staples are attached. Pivoting of the staplers 90 begins when the camshaft has rotated approximately 90 ° and they are returned to their original inoperative position after the camshaft has rotated approximately 180 °. The cam of the switch unit e is designed according to these requirements. The staples are attached while the staplers 90 are held in their pivoted operative position. The attachment or driving of the staples is controlled by a cam switch unit i which, when closed , energizes the solenoid of the clutch 111 a executing a single revolution in order to transmit the driving force of the constantly operating motor 111 by means of belts 115 a, 113 and 97 (Figs. 1 and 2). The cam switch is connected to the solenoid of the clutch 111a via a line 158 and grounded connections 159 and 140. The staples are attached approximately in the middle of the period required for the complete movement of the stapling devices 90 , and the shape and position of the cam of this switch unit i are adapted to these requirements.

As soon as the staples are attached, the stapling units 90 are pivoted back into their inoperative position, the folding elements 89 pivoted away from the covers and the cover clamping elements 86 are then raised to their original position, as has been described above. The container C located at the processing station is now completely finished and can be dispensed from this position as soon as the stops 92 and 92a are withdrawn. At this point in time, the camshaft has carried out an angular movement of approximately 240 °.

The stops 92 and 92a on the processing station and the stop 91 are now withdrawn. In the embodiment described, the movement of the stops is controlled by separate cam switch units. A unit g controls the stop 91, and a unit h controls the two stops 92 and 92a.

The switch unit g for the stop 91 is connected via a line 160 and grounded connections 161 and 140 to a valve 159 having a single electromagnet and a return spring. The supply of pressure medium to the front of the piston arranged in the cylinder 91 e causes the stop 91 to be retracted so that the container C can be advanced.

The switch unit h for the stop 92 is connected via a line 164 and earthed connections 165 and 140 to a solenoid valve 163 which is identical to the valve 159. The supply of pressure medium to the front of the piston arranged in the cylinder 92h causes the stop 92 to be withdrawn, as a result of which the container C held by this stop 92 is released. It is to be understood that the stop 92 a disposed opposite the stop 92 is controlled by an identical piston-cylinder mechanism, its solenoid valve being connected in the same way to the cam switch unit h.

When all of the stops 91, 92, 92a are withdrawn, the two containers C previously held by these stops are moved past the stops after the conveyor 13 has been started. Retraction of the stops 91, 92, 92a allows the fingers of the switches 91f and 93 to move freely outwardly, allowing these normally closed switches to close so that the circuit leading to the motor 28 is closed to keep the conveyor 13 in operation to put. Current for motor 28 flows from power source 141, which has a grounded connection 142 , via lines 140 and 167. On the other side of motor 28, the current flows through lines 168 and 169 via switch 93 and a grounded connection 170 . the lying parallel to the switch 93 switches 91f creates an additional diversion of the motor circuit via line 168 and a grounded connection 171. It is to be noted that this arrangement of the switch 91f and 93, made as previously described for the purpose of the circuit of the conveyor motor 28 closed until a container C has touched the switching finger of each stop 91 and 92.

At the same time that switches 91f and 93 move to their closed position, switches 125 and 126 are opened and remain open until switches 91f and 93 are closed again. The switches 125 and 126 are used, as previously described, to close the circuit for the motor 121 of the timing device 120. At this point in time, however, opening switches 125 and 126 does not switch off the current from motor 121, since the cam for switch m continues to rest on the switch rod, causing motor 121 to operate via auxiliary circuit 135, 136, 129, 130 and 131 is kept operating.

When the stops 91, 92, 92a are retracted, the conveyor 13 will continue to be driven by the motor 28 and the shaft of the timer 120 will continue to be driven by the circuit described above. The containers thus move beyond the stops 91, 92, 92 a by which they were previously held back. The container moving past the stop 91 moves towards the processing station and a new container moves on the conveyor 13 against the stop 91. As soon as the conveyor 13 has moved a sufficient distance, around the rear ends of the containers To be released from the stops, these stops 91, 92, 92a are in turn brought into the path of movement of the incoming container. The working sections of the cams of the switching units g and h have an appropriate length and are arranged in the correct angular position in order to bring about the movements of the stops 91, 92, 92a at the correct time. More precisely, the protrusion of the stops 91, 92, 92 a is caused by opening the switches g and h, whereby the springs of the electromagnets can reverse the positions of the valves and pressure medium is supplied to the rear of the pistons arranged in the cylinders for the stops .

The movement of the cams on the shaft of the timing device 120, by which the advancement of the stops 91, 92, 92a is effected, completes the cycle of operations of the timing device 120. The shaft of the timing device 120 is then opened by opening the circuit for the motor 121 stopped. Since the switches 125 and 126 remain open until there is no more container against the switching finger of the switches 91f and 93, the switching unit m represents the only control for the motor circuit. Since the motor 121 is stopped immediately after the stops 91, 92, 92a have been advanced can be, the cam for the switching unit m is set so that its working portion comes out of engagement with the cam follower shortly after the opening of the switches g and h controlling the stops 91, 92, 92a. This stops the rotation of the shaft of the timing device 120 from rotating.

The motor 28 driving the conveyor 13 continues to run after a container has come against the stop 92 and has moved the finger of the switch 93 until another container comes against the stop 91 and has moved the finger of the switch 91f . Since the switches 91 f and 93 are arranged parallel to one another, it is necessary to open both switches in order to stop the motor 28 .

After both switches 91f and 93 are opened, the two associated switches 125 and 126 are closed. By closing these two switches 125 and 126, as described above, a circuit for the motor 121 is completed and the shaft of the timer 120 begins a new cycle.

It can be seen that the execution of the various control circuits and the controls can be changed to a large extent without leaving the scope of the Invention to leave. In practice, numerous control and safety devices can be used for the convenience and safety of the operator, whereby however, the basic mode of operation is not affected.

The invention creates a machine by means of which cover flanges on otherwise finished containers are folded and fixed. The containers are discharged onto the conveyor 13 with their lids extending outward. When the machine is started, the operator places a container in front of the stops 92 and 92a and a second container just before the stop 91. Power is then supplied to the required circuits. The conveyor 13 then begins to move causing the containers to advance against the stops 91, 92, 92a. When a container comes against the stop 91 and against the stops 92 and 92a provided at the processing station, the switches 91f and 93 are opened, whereby the power supply to the conveyor motor 28 is interrupted. At the same time, the switches 125 and 126 are closed to set the motor 121 to drive the shaft of the timing device 120 in operation. After the shaft of the timer 120 has started to rotate, another circuit is closed by the switching unit m in order to keep the motor circuit closed independently of the switches 125 and 126 , which are opened near the end of the working cycle when the conveyor 13 is in operation is set to move the completed container and bring new containers against the two sets of stops 91 and 92 and 92a, respectively.

When the shaft of the timer 120 rotates, press the cams the switching units in the correct time sequence to the clamping elements 86 down against the main sections 18 of the covers and then the main flange by the elements 87 in position. The two flange sections 19, 20 each lid are then pushed apart at each end by the spreading fingers 88, and the corner flaps 23 are made by the folding elements 89 between the flange portions 19, 20 introduced. Thereafter, the stapling devices 90 are in their working position pivoted, and a staple is through the end parts each Flange and the corner tabs 23 driven through to the flanges in this position to hold rigidly.

After the processing elements have been moved back into their inoperative position, the stops 91, 92, 92 a are withdrawn, the conveyor 13 is put into operation, the finished container is released and the stops 91, 92, 92 a are advanced again to the next moving forward Stop container. Immediately after the stops have been advanced, as a result of the operation of the cam switch units g and h, the switch unit m, which is then the only control of the motor 121 of the timer 120 , moves to the open position and stops the timer 120 . As soon as two containers come into contact with the stops 91, 92, 92a again and the switches 91f and 93 are actuated and the conveyor 13 stops, the two switches 125 and 126 are moved into the closed position to restart the motor 121 of the timer 120 to start up. This repeats the cycle.

Claims (1)

Claims: 1. A machine for erecting at least one lid flange on a container made of flexible cardboard, the flange consisting of a front main section, which is formed from lid flaps that have already been folded onto one another and connected to one another in the middle part by adhesive, and of end flanges whose corner flaps are between the adhesive-free outer parts of the flaps are stapled, marked by a folding and stapling station as well as a conveyor device with guides (49) for the lid and at least one stop (92) for the correct positioning of the containers in the station, the folding device of which consists of a rail (86) that can be moved to and fro and a pivotable abutment (87) cooperating with it for erecting the flange (19, 20) and its corner brackets (23) and which has a further two-dimensionally pivotable folding tool (89) for the end flanges (22) has as well as with a pin (88) z is provided to spread the outer parts of the main flange, and the stapling device (90) is pivotable over the erected flange (19, 20) , and characterized by a timing device (120) for the hydraulic control of the tools of the folding and stapling station depending on the Stop (92). 2. Machine according to claim 1, wherein the conveyor device is arranged in longitudinally extending channel-shaped rods which are attached to upright frame parts carried by cross members, characterized in that the cross members (32) are provided with threaded parts (33), in which vertically arranged Gew @ .: rods (34, 34 a) are received, each of which is rotatably arranged for vertical adjustment of the conveyor in the upper and lower bearing arms. 3. Machine according to claim 1 or 2, characterized in that the guides (49) are attached to vertically extending supports (50) which have threaded projections (51) in which to adjust the guides in the direction against the center line of the conveyor and threaded rods (52, 52a) are received away from this. 4. Machine according to one of claims 1 to 3, characterized in that the conveyor device has at least one stop (91) for correctly positioning the container in front of the folding and stapling station, and that the stops (91, 92) each by means of a movement device ( 91 b to 91 e or 92 e to 92 h) can be moved into and out of the path of movement of the containers and carry a switch (91f or 93) coupled to the drive of the conveyor device, which engages with the containers Has trigger member. 5. Machine according to one of claims 1 to 4, characterized in that the folding device has a horizontal, movable in the vertical direction arm (86 b) with a folding and clamping element (86 c) which is provided with a lower flat surface which lies on the main portion (18) of the lid and holds it against the upper surface of a bearing arm (86a) , and that means ( 86f, 86g) are provided to move the arm ( 86b) into its lower position, while the lower cover flanges (19, 20) are fixed. 6. Machine according to claim 5, characterized by centering guides (59 c, 59 d) provided for centering the main flange (18) on the folding and clamping element (86c). 7. Machine according to one of claims 1 to 6, characterized in that the abutment (87) is arranged on a pivot pin (876) and has an upper rounded surface and a guide surface (87 a) for the corner bracket (23) and that one Means (87f, 87g) are provided for pivoting the abutment (87) and the flanges (19, 20) in order to hold the flanges in a position for the insertion of the corner flap (23) between them. B. Machine according to one of claims 1 to 7, characterized in that the pin (88) can be passed through an opening (21) in the one flange (19) and with the non-attached part of the adjacent, unopened flange (20) is engageable to allow access of the corner tab (23) between the flanges, and that means for advancing and retracting the pin (88) in timed relation to the operation of the abutment (87) and the folding tool for folding the End flange (22) and the corner bracket (23) is provided. 9. Machine according to one of claims 1 to 8, characterized in that the folding tool (89) is pivotably arranged on a pivot pin held in bearings (89 a) and carries a slotted arm (89b) rigidly connected to it, in its slot The pin accommodated in a two-armed connecting element (89 e) is arranged displaceably, the connecting element (89 e) being connected to an actuating device (89 c, 89 d) for moving the pin along the slot and for pivoting the folding tool. 10. Machine according to one of claims 1 to 9, characterized in that the stapling device (90) has a device (90 a) for attaching a staple, an anvil (90 b) and a support frame (90 f) arranged in a working relationship with this and is coupled to a drive and actuating device which makes a shaft (94) and a device (103 to 110) pivotable about an axis coinciding with the axis of the shaft and a drive device for the shaft (94) for the purpose of actuation the stapling device for driving a staple through the flanges (19, 20) and the corner flap (23). 11. Machine according to claim 10, characterized by a motor provided for the pivoting movement of the stapling device and a time control device which actuates the motor. 12. Machine according to one of claims 1 to 11, characterized in that the time setting device (120) has a shaft on which a plurality of cams are arranged, each of which has a switch (b to i, for synchronously controlling the working elements of the machine) m) is assigned. References considered: U.S. Patent Nos. 2,872,855, 2,818,005.