NO139546B - FACILITIES FOR THE MANUFACTURE AND APPLICATION OF EDGE FITTINGS OR LOOKS ON CONTAINERS OR SIMILAR OR ON PARTS THEREOF - Google Patents

Description

The invention relates to a device for the manufacture and placement of edge fittings or sheet metal on containers, boxes, packaging or the like or on parts of which such containers are composed, with at least one supply device for a strip from a supply, a punching device for punching out retaining teeth as well as a pair of scissors for cutting off pieces of fixed length.

It is known to cut up strips for edge fittings or sheets of fixed length after punching or pressing and possibly other work operations in a special facility for the purpose have been completed. The cans are then collected, stored and later in another facility placed on the containers or container parts.

However, this method is associated with disadvantages, in particular

in that the tin cans must be transported from one plant to another before they are placed on the containers. This causes increased costs for transport and handling and conditions a very large need for space.

There are also e.g. from German patent document 849 303 known devices where the material for the fastening elements is pulled off from a supply roll and deformed, after which the formed fastening elements (wire staples) are driven into workpieces.

With the known devices, the formation and placement of the fastening elements are admittedly combined in a single machine, but several tools are used for the various work operations.

The invention is based on the task of

better facilities of the type indicated at the outset.

In order to solve the problem, the invention is based on that there

in connection with the scissors, a pressing device is arranged to press the edge fittings against the containers, resp. the container parts, immediately

after cutting off the tin strip, and that the punching device, the scissors and the pressing device are arranged on a common tool which is movable back and forth in relation to a stationary frame.

Thanks to this combination of punching device, scissors and pressing device, control devices are no longer needed to coordinate the activation of the punching device, scissors and pressing device during the production and placement of edge fittings or

-glance.

Another advantage of the invention lies in the fact that the cans can be pressed onto the containers or container parts immediately after processing. There is thus no need for special machines for pressing the cans. Furthermore, the transport and handling of the individual edge plates between the different work operations is no longer required. Furthermore, an advantage of the device according to the invention consists in the fact that it can be set in a simple and time-saving way for edge plates of different lengths.

Further features and details of the invention will be apparent from the following description, where reference is made to the drawing, which shows examples of the device (machine) according to the invention.

Fig. 1 is an elevation of a first embodiment of the machine,

fig. 2 is a corresponding elevation of part of the machine

1 larger scale and partly averaged,

fig. 3 shows a cross-section along the line III-III in fig. 2, fig. 4 shows a cross-section along the line IV-IV in fig. 2,

fig. 5 shows another embodiment in elevation and

partly in section, and

fig. 6 is an end view of the machine in fig. 5.

In fig. 1 generally denotes the part of the machine that processes a strip - hereinafter called a strip - which is to form a fitting to press firmly on the container parts in question, and 2 a supply with a strip 3 which is fed via a feed station 4 to the processing part 1 for the strip. The tape supply 2 can advantageously consist of a spool for a tape roll, preferably several hundred meters long. The band 3 most conveniently consists of metal, e.g. carbon steel, with such a suitable width and thickness that processing of the strip can be carried out smoothly. Thus, bands of metal can in practice have a width of 3-5 cm and a thickness of 0.5-1.5 mm. However, the invention is not limited to bands of metal, as other materials are also conceivable.

In the case shown, the feeding station 4 consists of two

rollers 6 and 7 which are stored on top of a column, and of which one 6 has operation from a motor 8, while the other 7 has a spring-loaded device against the belt 3 which runs between the rollers. From the feeding station 4 to the processing part 1 of the machine, the belt 3 runs in a guide 9, for example consisting of two elongated sheets with spacers in between.

The processing part 1 includes partly a fixed or stationary stand, generally denoted by 10, and partly a tool, generally denoted by 11, which can be moved in relation to the stand 10. In the embodiment shown, the movable tool consists of an elongated, beam-like body which can is moved vertically towards and from the stand 10 by means of a drive mechanism which is not shown in detail in the drawing, e.g. of a similar nature to those used for hammers. The drive mechanism is indicated in the drawing by the connection part 12.

In accordance with the principle of the invention, there is arranged on the movable tool 11 a press member 13 which cooperates with a counter-hold 14 on the stand 10. Furthermore, there is arranged on the movable tool 11 a cutting member (scissors) 15 and a punching device 16 which corresponds to a quilt 17 on stand 10.

Reference is now made to fig. 2 and 4, which illustrate the design of the press member and counterweight in more detail. It is seen here that the pressing member 13 includes a guide member in the form of a slide 18 which is placed at or near one end - the discharge end - of the tool 11 and consists of an elongated plate, preferably of hard metal, attached to the underside of the tool with fastening means, e.g. screws 19. The sliding plate 18 has on its underside a V-shaped recess with two pressure surfaces 20 and 21. The angle between the surfaces 20 and 21 is approximately 160° in the case shown.

The support 14 consists of an arm 23 which projects from the stand under the slide plate 18. As best shown in fig. 4 has the arm 23 on

its upper side two support surfaces 24 and 25 which lie at an angle to each other, and which two container walls 26 and 27 can be supported on during a pressing operation. The angle between the support rafts 24 and 25 is in this case approx. 200°, so the angle between the pressure fins 20 and 21 on the slide 18 plus the angle between the support surface 24 and 25 to-

together make 4R or 360°. Also on the underside, the arm 23 has a V-shaped profile with flanks which can form the same angle with each other as the support rafts 24 and 25 on the upper side.

On the underside of the slide 18 is a holder 28 to hold the fitting or band 3 in place and control it in relation to the slide in the time until the fitting is pressed into the container walls 26 and 27. In a particular embodiment of the invention, the holder consists of two in relation holder bodies 29 inclined to each other which can move in slots 30 in the slide plate 18. The holder bodies 29 are most conveniently made up of elongated strips which are held back in the slots 30 by impact, which are not shown in more detail. In fig. 2 and 4, the holder bodies 29 are shown in a first position, where they protrude from the slide with a mutual distance at the lower edge somewhat less than the width of the fitting 3. The fitting 3 is thereby held in place between the projecting lower edge portions of the holder bodies. When the slide 18 is displaced towards the counter-holding arm 23 during a pressing operation and the holder bodies 29 come into contact with the container walls 26 and 27, the holder bodies will be pushed inwards into the slots 30 to another position, where the distance between their lower edges is greater than the width of the fitting 3, . so this is released and can be pressed firmly into the container walls. In an embodiment as shown in fig. 4, the holder bodies can be movable from the second to the first position under the action of gravity alone, i.e. fall by their own weight to the first position shown, where the fitting is held back in relation to the slide. It is also possible to place springs in the slots 30, e.g. helical compression springs, which constantly seek to lead the holder bodies to the first position shown. , It appears from fig. 4 that the holder bodies 29 are positioned close to each edge of the V-shaped recess 22 in the slide.

The above-mentioned cutting device 15 is constituted in this case by a first egg or edge 31, which is formed on the sliding plate 18 and can be moved in relation to another egg or edge 32, which sits on the stand 10, more specifically appropriately on its cushion 17, and lies in the same vertical plane as the first egg 31. As is clear from fig. 2, the second egg 32 sits at a certain height above the counter-holding arm 23. Thus, the band 3 will be cut into a single fitting just before the fitting is pressed firmly into the container parts.

Reference is now made again to fig. 2 and further to fig. 3,

which shows the punching device in the machine in more detail. It can be seen that this device includes a plurality of individual or group detachable or removable punching means 33 which can be moved down into holes 34 in the cover 17. The individual punching means 33 have the form of cylindrical studs whose lower ends are bevelled and pointed to penetrate through the tape and punch out a number of fastening tabs in this, in the case shown four. The punching means are placed in two parallel rows to form two rows of attachment tabs in the tape. In and of itself, it is also possible to place the individual punching elements differently, e.g. in zigzag configurations or in more than two rows. The punching means are fixed in groups on a number of punching holders 35. In the embodiment shown, each punching holder 35 is connected to three pairs of punching means, although it is of course possible to arrange a larger or smaller number of punching means on each holder. The punch holders with associated punching elements are releasably connected to the movable tool 11

in a way that will be discussed in more detail with reference to fig. 3. The flanks of the punch holders lie at an angle and in abutment against correspondingly inclined side surfaces of two strips or guide rails 37, 38. Of these, the strip 37 is attached to the beam-shaped part 11 with screws 39 or other suitable fastening means which are accessible from the underside. The second strip 38 is mounted on the beam 11 with screws 40

which are easily accessible from the top of the beam. A fitting piece 41 is inserted between the upper side of the punch holder and the beam 11,

which, like the punch holders and the strips, can advantageously consist of cemented carbide. When the screws 39 and 40 are tightened and rest against the beam body 11, the punch holders 35 are clamped and firmly fixed in relation to the beam 11. When one or more punch holders are to be removed, the screws 40 are loosened so that the clamping effect of the strip 38 on the punch holders ceases , after which the fitting 41 is removed and the relevant holder can be dismantled or be exchanged. It thus becomes possible to adapt the number of punching elements according to different lengths of the fittings to be produced in the machines. If it is a question of fittings of maximum length, the full number of punches is used,

and if fittings of shorter length are to be made, a suitable number of punch holders with associated punching devices is removed.

Between the punching members 16 and the quilt 17 it is placed

a wiper element 42 to remove the fastening tabs in the band from the punching means after punching has been carried out. The scraper element consists of a plate which has cut-out holes 43 for the punching means and is connected to the beam 11 by springs 44, suitably screw-compression springs. In order to control the scraper plate 42 so that it constantly moves vertically, studs 45 are connected to the plate and have guides with a sliding fit in sockets or consoles 46 fixed on both sides of the beam 11. In fig. 3, for the sake of simplicity, a single guide post with associated socket is shown, although there are such guide devices on both sides of the beam. The screw compression spring 44 seeks to keep the scraper plate 42 at a distance from the beam 11, so that the punching members 33 take the position in fig. 2 and 3, where their lower ends are not in contact with the band 3.

On the underside of the squeegee plate or more precisely

in an insert piece 47 in this, a recess 48 is formed which corresponds to a raised part 49 of the quilt 17. This elevation 49 has a somewhat smaller width than the band 3. The recess 4 8 in the insert 47 has two more or less sloping flanks 50. this allowed it to appear that the two edge portions of the tape, when the elevation 49 during a punching operation penetrates into the recess 48, will be shaped so that they get a kink or slope in relation to the tape

by the way. These obliquely bent edge parts of the band will later penetrate the wall material of the container parts during the pressing against the relevant container parts, whereby it is avoided that the edge parts of the fitting escape this.

On the quilt 17 sits a number of springy bodies 51, which have the task of keeping the tape 3.ri -a distance from the top side of the quilt conditioned by the length of the fastening tabs and thus preventing the tabs from coming into contact with the quilt after punching. In practice, the spring bodies 51 can take the form of elongated metal pieces that can move in the cut-out 52 in the cover and via screws 53 or other bodies are affected by screw compression springs 54 that seek to hold the pieces 51 in a position where they protrude to a certain, constant distance from the quilt. On the spring body 51 which sits closest to the cutting member 15, there is a control element 55 in the form of a leaf spring which has the task of guiding the punched band 3 into the holder 28 on the slide 18.

As shown in fig. 1, the counter-holding arm 23 for the press member 13 is arranged freely projecting. A container array, e.g. consisting of four walls, will thus be able to be guided around the arm 23 by pressing on at least the last of the four corner fittings that hold the walls in question together. However, if the arm 23 is extremely long to allow the pressing of long fittings, the end protruding from the stand 10, as shown in fig. 1, a support member 56 is placed which can be swung from a rest position where it is out of contact with the arm to allow the placement of the container sari around it, to a working position where it supports the end of the arm as shown. The maneuvering of the pivotable support member 56 is coordinated with the maneuvering of the machine otherwise, so that the member will only support the arm during the pressing phase, while it otherwise assumes a rest position.

The container parts to which the fittings are to be pressed, preferably consist of some wooden material, e.g. cross veneer. However, it is also possible to use the machine in connection with container parts of other materials, e.g. paper, plastic or combinations of paper, wood and plastic.

The described machine works as follows: From the supply reel 2, the tape 3 is fed step by step into the machine's working part 1

by means of the feed rollers 6 and 7. In each step, the tape is advanced a length corresponding to the length of the desired fitting, and this length is in turn determined by the dimensions of the container or the container parts to which the fittings are to be pressed. While the tape is advanced, the movable tool 11 is in a rest position at a highest level, where the punching means are not in contact with the tape. When a feeding step is finished, the movable tool 11 is moved downwards by means of the mechanism not shown, with the following result:

In a first phase, a first series of attachment tabs is punched out

in the band 3, the punching means 33, when the tool 11 has moved down so far that the scraper plate 42 for abutment against the quilt 17, moves through the band and goes a little way down into the quilt's hole 34, below which the band is cut through by the punching members and shaped against the walls of the holes 34. In this phase, the tool 11 works against the action of the pressure springs 44. Just before the scraper plate 42 comes into contact with the quilt 17, the bending or embossing of the edge parts of the strip 3 takes place, as the elevation 4 9 on the quilt presses the strip

into the recess 48 in the scraper plate and the edge portions of the tape thus assume the shape of the inclined side walls 50 of the recess.

In another phase, which with respect to time is independent of the punching, the band 3 is cut so that a single fitting is separated which already has fastening tabs from a previous punching operation. The cutting of the band takes place with the help of the cutting device 15, as the edge 31 on the slide 18 during the downward movements of the tool will pass the other edge 32 and thereby exert the cutting effect.

In a third phase, which follows the cutting phase, the cut fitting is pressed firmly against the relevant container parts. This happens with the help of the slide 18, whose holder 28 holds and guides the fitting until the slide reaches its lower end position, where the fitting with its fastening tabs is pressed firmly into the container parts.

When the tool 11 moves upwards again after a downward working stroke, the scraper plate 42 will remove the tape 3 from contact with the punching means 33, the springs 44 removing the plate and thus also the tape from the punching means. At the same time, during the punching phase, the pressing down spring bodies 51 will be moved up a bit by their springs 54 to hold the band 3 at a certain height above the quilt 17. In this way, the punched fastening tabs will not come into contact with the quilt, so longitudinal feeding of the band can take place without obstructed by the punched attachment tabs.

When the tool 11 has reached its upper end position, a new length of tape is advanced, under which the piece of tape with the series of fastening tabs that were punched out in the previous work step is moved over to the press member 13. The process is then repeated insofar as a new series of fastening tabs is punched out, the band is cut off bg the fitting which is located in the holder 28 on the pressing member 13, is pressed firmly into the container part in question.

The maneuvering of the tool 11 takes place advantageously by means of hand-operated maneuvering means and as the person who places the container parts 2 6 and 27 on the counter 14 regulates the movements of the tool.

Reference is now made to fig. 5 and 6, which show another embodiment of the machine. This is intended for shorter fittings than the machine shown in fig. 1-4, and is specially adapted to attach fittings to drawers or containers whose walls can form angles of 90° with each other. Like the first mentioned machine, the machine in fig. 5 and 6 a stand 10 and a movable tool 11, which are connected by connections 12 with a suitable drive mechanism not shown. On the stand 10 is a projecting arm 2 3 with two support surfaces 24 and 25 for the container walls 26 and 27. The movable tool 11 has a slide 18, a cutting device 15 and a punching device 16. On the stand 10 is a cushion 17 for the punching device. Furthermore, a wiper element 42, a spring body 51 and a control element 55 can be found in the machine. On the cover 17 there is an elevation 49 corresponding to a recess in the wiper element 42.

In the embodiment in fig. 5 and 6, the angle between the two pressing surfaces 20 and 21 in the V-shaped recess 22 in the slide is less than 90°, e.g. between 85 and 89°. As the two container walls 26 and 27 are placed at right angles to each other, this means that during the pressing, the two edge parts of the fitting will seek to penetrate into or press against the walls 26 and 27 more strongly than the middle part of the fitting.

In this case, the holder 28 for retaining and guiding the band or the fitting in relation to the slide 18 has two opposing grooves 57, 58 in the pressure rafts 20 and 21 respectively in the recess 22. The distance between these two grooves is smaller than the width of the band 3 before this is bent, but greater than the distance between the edges of the fitting after the bending has been carried out. This means that the band or fitting is released from the grooves 57, 58 in connection with the pressing of the fitting onto the container walls 26, 27.

The cutting device 15 consists of a knife or ax 59 which is connected to the movable tool 11 and arranged to cut the band 3 against the edge or edge 32 of the quilt 17. As can be seen from fig. 6, the knife 59 is connected at both ends to the piston rods 60 and two pneumatic cylinders 61, which act as springs for the knife 59. The knife has vertical guidance on two pins 62 which engage in oblong guide grooves 32 in the knife. On one side of the knife (fig. 5) a first ledge 64 is formed which limits the stroke length of the knife when the tool 11 moves downwards. On its opposite side, the knife is designed with another ledge 65, where the knife is caught by a cam 66 on the slide 18 during the upward movement of the tool.

As with the first described machine, the individual punching members 33 are fixed in groups in a number of punching holders 35. These holders, which have inclined side surfaces, are pushed in between two guide strips 67, of which only one is visible in fig. 5. An L-shaped wedge 68 provided with a screw 69 which can be screwed into the tool or the beam 11 is used to clamp the punch holders between the guide strips 67. When the screw is tightened, the wedge 68 will move to the right in fig. 5 and clamp the individual punch holders 35 with their bevelled side surfaces in contact with corresponding surfaces on the guide strips 67. When removing one or more of the punch holders, the screw 69 is loosened with a simple hand grip, so the wedge comes loose and the punch holder can be removed from the space between the guide strips 67.

The machine in fig. 5 and 6 work in a similar way as

the one in fig. 1-4, seen from the cutting member 15 and the holder 28.

Regulation and maneuvering of the various units included in the machine according to the invention can be carried out electrically, pneumatically or hydraulically as desired. As can be seen in fig. 1, the feeding of the tape can be carried out by means of rollers, but it is also possible to arrange feed mechanisms consisting of joint arms or other mechanical elements, which pinch the tape firmly and feed it forward in its longitudinal direction.

The advantages of the invention are obvious today, as the fittings are pressed onto the respective containers or container parts immediately after processing. This eliminates the need for special machines to press the fittings firmly. Furthermore, all unnecessary transport and handling of individual fixtures between different stations is eliminated. Other advantages of the machine according to the invention consist in the fact that it can be adapted to fittings of different lengths in a simple and time-consuming manner.

Claims (22)

1. Device for the production and placement of edge fittings or sheet metal on containers, boxes, packaging or the like or on parts of which such containers are composed, with at least one supply device for a strip from a supply, a punching device for punching out holding teeth as well as a pair of scissors for cutting off pieces of fixed length, characterized in that a press member (13) is arranged in connection with the scissors (15) to press the edge fittings against the containers, resp. the container parts (26, 27) immediately after cutting off the tin strip (3), and that the punching device (16), the scissors (15) and the pressing member (13) are arranged on a common tool (11) which is movable back and forth in relation to a stationary frame (10). 2. Device as stated in claim 1, characterized in that the tool (11) is designed as an elongated, beam-like body which can be moved across its longitudinal direction, preferably vertically. 3. Device as stated in claim 1 or 2, characterized in that the pressing member (13) has a guide body (18) which is arranged at one end of the tool (11) and is movable in relation to an associated counter-hold (23). 4. Device as stated in claim 1, 2 or 3, characterized in that the guide body (18) has a recess (22) with two pressure surfaces (20, 21) which are at an angle to each other, and the counter-stop (23) has two support surfaces ( 24,25) which are at an angle to each other and are directed towards the guide body (18). 5. Device as stated in claim 4, characterized in that the angle between the pressure rafts (20,21) and the angle between the support rafts (24, 25) together make up 360°. 6. Device as stated in claim 4, characterized in that the angle between the support rafts amounts to 270° and the angle between the pressure surfaces is less than 90° and preferably amounts to 85-89°. 7. Device as stated in one of claims 3-6, characterized in that a holder (28) which can grip the edges of the tin strip (3) is assigned to the guide member (18). 8. Device as stated in claim 7, characterized in that the holder (28) comprises at least two holder bodies (29) which are inclined in relation to each other and are movable in slots (30) in the guide body (18) between a first position where they protrude from the guide body (18), and where the distance between the protruding edges of the holder body (29) is less than the width of the tin strip (3), and another position where they are inserted into the guide body (18), and where the distance between the edges of the holder body (29 ) is greater than the width of the tin strip (3). 9. Device as stated in claim 8, characterized in that the holder bodies (29) are movable from second to first position under the action of gravity. 10. Device as stated in claim 8, characterized by springs that press the holder bodies (29) from the second to the first position. 11. Device as stated in claim 7, characterized in that the holder has two grooves (57, 58) which are arranged opposite each other in the pressing surfaces (20, 21) of the recess (22), and whose mutual distance is greater than the distance between the edges of the tin strip (3) after these are bent at an angle. 12. Device as set forth in one of claims 3-11, characterized in that the support (23) is designed as an arm that projects from the frame (10). 13. Device as specified in claim 12, characterized in that the end of the arm facing away from the frame (10) is supported, and the support* is optionally movable to a resting position out of contact with the arm and to a working position where the end of the arm is supported. 14. Device as specified in one of claims 1-13, characterized in that the scissors (15) consist of a first edge (31) which is arranged on the guide body (18) and together with the tool (11) is movable in relation to another edge (32) which is arranged in the frame (10), and that this other edge (32) is arranged at a distance from the counter-hold (23) of the press member (13), so the cutting process is completed before the edge sheets are pressed against the container parts (26, 27 ). 15. Device as set forth in one of claims 1-13, characterized in that the scissors (15) have a knife (59) which is arranged on the tool (11) and which can be moved to a limited extent in relation to this, and which, for carrying out the cutting operation, cooperates with an edge (32) which sits on the frame (10) at a distance from the counter-hold (23) of the pressing member (13), so that the cutting operation is completed before the edge sheets are pressed against the container parts (26, 27). 16. Device as stated in one of claims 1-15, characterized in that the punching device (16) has several punching stamps (33) which can be detached individually or in groups and are arranged opposite bores (34) in a matrix (17) attached to the frame (10). 17. Device as stated in claim 16, characterized in that there are several punch holders (35) which each carry a group of punching means (33) and are connected to the tool (11) by means of retaining strips (37, 38) screwed onto the tool. 18. Device as specified in one of claims 1-17, characterized in that between the punching device (16) and the matrix (17) a scraper device is placed for scraping off the tin strip (3) from the punching means (33). 19. Device as stated in claim 18, characterized in that the scraper device includes a scraper plate (42) which is provided with bores (43) for the passage of the punching means (33), and which is connected to the tool (11) and displaceable in relation to to the punching means, at the same time that springs are arranged between the tool (11) and the plate (22) which press the scraper plate (42) away from the tool itself. 20. Device as stated in claim 18 or 19, characterized in that the wiper plate (42) has a flat groove (48) and the matrix (17) a corresponding elongated projection (49), so that the edges of the tin strip (3) are bent at an angle by the shaping of the retaining teeth. 21. Device as set forth in one of claims 1-20, characterized in that at least one spring body (51) is arranged in the matrix (17) which presses the tin strip (3) away from the upper side of the matrix. 22. Device as stated in claim 21, characterized in that the spring body (51) which borders directly on the scissors (15), has an e.g. guide (55) designed as a leaf spring for introducing the tin strip (3) into the press member (13).