DE9401138U1 - Baler - Google Patents

Description

Applicant: Jumbo Pressen GmbH Böblingen, 22.01.94 Hauptstraße 3 File number J 0003

88374 Hoßkirch

Representative: Patent Attorney
Dieter Späth
Murkenbachweg 74
71032 Boeblingen

Baler

The invention relates to a baling press, in particular for compressing cardboard boxes and other packaging, with the features of the preamble of claim 1.

Such a press is sold by Schleicher & Co. International AG, for example, under the name DIXI 16 S. This well-known baling press is housed in a cabinet-shaped housing. It has a cuboid-shaped pressing chamber in which a vertically operating ram is arranged.

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In order to fill in the material to be compressed (the material to be pressed) and to remove the material that has been compressed into a bale, the known baling press has an opening that runs from the bottom of the pressing chamber to an upper starting position of the ram. The starting position is the position in which the ram is for filling in the material to be pressed; this is normally also the highest possible position of the ram.

The filling and removal opening can be closed by means of a door that can be pivoted about a vertical axis on its right-hand side. A filling flap is provided for filling the press, which occupies the upper area of the removal door and can be pivoted about a horizontal axis on its underside into a horizontal position; the removal door remains closed during filling.

The person who has to fill something into the well-known baler has to pull the filling flap down towards themselves and, unless they have bent forward to open the filling flap, take a step back, which is impractical. When filling, the flap protrudes from the press towards the person filling it, thus keeping the person filling it at a distance from the press; this makes filling it awkward on the one hand and also means that the person filling it has to bend forward over the filling flap and thus adopt a posture that puts strain on the back.

The object of the invention is to propose a user-friendly baler of the type mentioned at the beginning, which prevents incorrect operation.

This task is solved by the features of the characterizing part of claim 1. To open the filling flap, it is pushed upwards on the front of a press housing, so it does not move towards the person filling the material, who does not need to

The filling flap cannot be avoided when opening. Furthermore, the person filling the bale can stand upright and fill it with material to be pressed. The opened filling flap pushed upwards does not protrude from the bale press in a disturbing manner.

Preferably, the filling flap is guided by pivoting impact levers. This is a simple way of guiding the filling flap. The filling flap moves on a circular arc when opening and closing and maintains its vertical position. At the end of the closing movement, the filling flap moves on its circular arc in addition to the downward movement from the front towards the pressing chamber and in doing so pushes any material protruding from the pressing chamber into the pressing chamber.

When opening, the filling flap moves forwards away from the pressing chamber in addition to its upward movement, thereby freeing itself from any material to be pressed that may be resting on its inside. This prevents material to be pressed from becoming trapped between the filling flap and the upper edge of the filling and removal opening.

To assist in opening the filling flap, at least one spring is provided that pushes the filling flap upwards against its weight. The spring can be so strong that it pushes the filling flap upwards into the open position by itself, so that the filling flap only needs to be unlocked to open it, which is particularly advantageous when someone is holding material to be pressed in both hands to fill it into the baler. The spring also has the task of holding the filling flap in its open position.

The spring is in particular a gas pressure spring, i.e. a spring that contains a damper. The spring

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engages one of the parallel levers or the filling flap itself and rests against the press housing.

In order to ensure that a band, which is intended to bind the material to be pressed into a bale and which is pulled downwards at the back of the baling chamber and forwards at the bottom before the baler is filled, is not unwound from the ram or from the material to be pressed from a supply roll during the lifting movement of the ram, the baler according to the invention is provided with a band brake which is actuated by the filling flap: When the filling flap is closed, the band is braked so that it cannot be unwound any further from the supply roll; when the filling flap is open, the band brake is released so that after a compressed bale has been removed - the filling flap is open during removal, as is the removal door - the band can be unwound from the supply roll and pulled downwards at the back of the baling chamber and forwards at the bottom, where the band is secured to brackets. Because it is coupled to the filling flap, the band brake does not need to be operated separately, which in addition to simplifying the operation of the baler, has the advantage that the band brake is not accidentally released when the ram compresses the material to be pressed.

The supply roll is conveniently arranged in a space inside the press housing above the press chamber, in which the ram drive is also located. Normally, several such belts are provided at a distance from one another in a baler, each of which requires a belt brake.

The band brake can, for example, be designed as an eccentric brake with an eccentrically mounted brake body, which is pivoted by the filling flap when it is closed, so that it presses the band against a braking surface when the filling flap is closed and thus fixes the band;

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When the filler flap is opened, the brake body is pivoted away from the braking surface so that the band is released.

In a preferred embodiment of the invention, the band brake has a tube in which a round rod is rotatably mounted. A hole is provided in the tube and the round rod for each band, which, when the band brake is released, runs in a line through the tube and the round rod and through which the band can be pulled freely. To activate the band brake, the round rod is pivoted relative to the tube by closing the filling flap, whereby the hole in the tube no longer matches that in the round rod; the band enters the interior of the tube through the hole at one point on the wall of the tube, is then guided around the round rod in the space between the tube and the round rod according to the pivot angle of the round rod, continues through the hole in the round rod, through it to the other side and further in the space between the tube and the round rod to the hole on the side of the tube opposite the entry point, where the band exits the tube. When the band brake is activated, the band is clamped in place by the multiple deflections in the band brake, by the wrapping around the round rod and by friction in the space between the pipe and the round rod.

The diameter of the round rod is smaller than the inner diameter of the pipe, at least in the area where the band is wrapped around it when the band brake is applied, so that the band is not sheared off when the band brake is applied. The diameter of the round rod can be smaller than the inner diameter of the pipe overall; instead, it can be provided with shallow grooves at the points where the band is wrapped around the round rod when the band brake is applied, the cross-section of which is adapted to the cross-section of the band to be used. The gap between the pipe and the round rod should be smaller

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than the thickness of the belt so that the belt is braked in this gap when the band brake is applied.

To operate the band brake, a lever rod is provided which is hinged to one of the parallel levers for guiding the filler flap and which pivots the brake body or the round rod when the filler flap is opened and closed.

In order to avoid having to pull the band forwards from the back of the bale chamber to tie off a compacted bale, which requires a pulling hook or other aid, the band is guided from front to back on the stamp in one embodiment of the invention, for which it is deflected around rollers or round pins on the front and rear edges of the stamp, for example. The band runs from the supply roll through the band brake to the front edge of the stamp and further along the stamp to its rear edge. From there the band is guided downwards along the back of the bale chamber and forwards again along the floor. During the stroke movement of the stamp, the band moves relative to the stamp from front to back during the working stroke and vice versa during the idle stroke along the pressure surface of the stamp, which is why the stamp has band channels that are open downwards towards the pressure surface of the stamp. The band brake is arranged above the filling opening in this embodiment of the invention.

A holding element is provided on the rear edge of the stamp to deflect the band. After the bale has been tied, this element opens and releases the band when the stamp is moved upwards from its lower end position, in which the bale is tied, to its starting position. The holding element is a holding pin that can be pivoted about its transverse axis and has a preferably round cross-section.

The invention is explained in more detail below using an embodiment shown in the drawing. It shows:

Fig. 1 is a front view of a baler according to the invention;

Fig. 2 is a side view of the baler according to Fig. 1 without side wall in a schematic representation;

Fig. 3 shows a guide according to the invention for a filling flap with an actuating mechanism for a band brake;

Fig. 4 shows the belt path in the baler according to Fig. 1 and 2, schematically seen from the side;

Fig. 5 is a longitudinal section through a band brake according to the invention in the released position;

Fig. 6 is a cross-section through the band brake according to Fig. 5 in the released position;

Fig. 7 is a cross-section through the band brake according to Fig. 5 with the band brake actuated;

Fig. 8 a detachable holding finger in view; and

Fig. 9 is a section along line IX - IX in Fig. 8.

The cabinet-shaped baler shown in Fig. 1 and 2 has a pressing chamber 1 in which a ram 2 performs a working stroke from a position indicated by dash-dotted lines in Fig. 2.

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initial position into a final position shown in solid lines. On the front side, the press chamber 1 has an opening that runs from the floor to the height of the ram 2 in the initial position, the lower removal section of which, extending from the floor to the height of the ram 2 in its final position, can be closed by a removal door 5 hinged on the right and the upper filling section of which, which takes up the rest of the opening, can be closed by a filling flap 6, which can be opened by parallel levers 7, which protrude from a press housing 3 through slots 8 in a front wall, and can be moved upwards on a circular arc shown in dashed lines into the position shown in dashed lines. The filling flap 6 is provided with two handles 9 and has a locking mechanism (not shown) that can be operated with an actuating element 10. The removal door 5 is also equipped with a locking mechanism (not shown) which is operated with a pivoting lever 11 and secured by a locking bolt 12.

Fig. 3 shows the parallel guide of the filling flap 6 and an actuating device of a band brake 13. The filling flap 6 is shown in Fig. 3 - in contrast to Fig. 1 and 2 - in the open position; the closed position is indicated by dash-dot lines. The filling flap 6 is held on both sides by two levers 7 arranged one above the other, of equal length and parallel to one another, which are pivotably attached to the housing 3 of the press. A gas pressure spring 51 engages each of the two lower parallel levers 7, which press the filling flap 6 upwards into the open position against its weight. In the lower, closed position, the filling flap 6 is held by its locking mechanism (not shown).

To actuate the band brake 13, a lever rod with a pivot lever 49 is provided, which is pivoted (in Fig. 3 anti-clockwise) via a coupling rod 50 engaging thereon, which is hinged to a lower parallel lever 7, to actuate the band brake 13.

Fig. 4 shows schematically the guidance of a band 42 for tying a compacted bale in a side view of the baler. The band 42 is wound on a supply roll 43, which is arranged so that it can rotate in a space above the pressing chamber 1 inside the housing 3. From the supply roll 43, the band 42 is guided through the band brake 13, which is attached to the front inside the housing 3 above the filling and removal opening, and from there down to the front edge of the stamp 2. At the front edge of the stamp 2, the band 42 is guided around a deflection pin 45 with a circular cross-section and runs in a band channel that is open downwards, i.e. towards the pressure surface of the stamp 2, to the rear edge of the stamp 2. There, the band 42 is deflected downwards around a transverse finger 39 and guided at the rear of the press chamber 1 to the floor of the press chamber 1. At the edge that the floor and a rear wall of the press chamber 1 form together, the band 42 is inserted from the side under a short plastic strip that is only attached on one side and serves as a band holder 46. From there, the band 42 runs on the floor of the press chamber 1 to the front of the baler, where the end of the band 42 is secured to a holder 47, for example a hook or a clamp. When the stamp 2 moves up and down, the part of the belt 42 located in the belt channel of the stamp 2 moves back and forth in relation to the stamp 2. In the baler described, three belts 42 are arranged next to one another.

Fig. 5 to 7 show a band brake 13 according to the invention for fixing the band coming from the supply roll 43 (Fig. 4).

Band 42 with the filling flap 6 closed. The band brake 13 has a tube 52 in which a round rod 53 is rotatably mounted. The round rod 53 has a slightly smaller diameter than the inner diameter of the tube 52, so that there is a gap 54 between the round rod 53 and the tube 52, the gap width of which is slightly smaller than the thickness of the band 42. Through-holes 55 pass through the tube 52 and the round rod 53, through which the band 42 is guided. In the embodiment shown, three bands 42 are arranged next to one another and accordingly three through-holes 55 are provided in the tube 52 and the round rod 53. The pivot lever 49 is fixed in a rotationally fixed manner to an end of the round rod 53 that protrudes laterally from the tube 52.

In the released position of the band brake 13, the through hole 55 goes straight through the tube 52 and the round rod 53, so that the band 42 can move through the band brake 13 (Fig. 5 and 6). If the pivot lever 49 is pivoted via the coupling rod 50 by means of the parallel lever 7 when closing the filling flap 6 (Fig. 3), it pivots the round rod 53 relative to the tube 52 (Fig. 7). The section of the through hole 55 in the round rod 53 now runs at an angle to the sections of the hole 55 in the wall of the pipe 52. The band 42 runs through a section of the hole 55 through the wall of the pipe 52 into its interior and from there in an arc in the gap 54 between the pipe 52 and the round rod 53 around the latter to the section of the through hole 55 in the round rod 53 through which the band 42 runs to the other side of the round rod 53. From there the band 42 again runs in an arc through the gap 54 between the pipe 52 and the round rod 53 around the latter and exits through the second section of the through hole 55 in the wall of the pipe 52 on the opposite side from where it entered the pipe 52. Due to the multiple

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Due to the deflection, the wrapping around the round rod 53 and the friction in the gap 54 between the round rod 53 and the tube 52, the band 42 is fixed when the band brake 13 is actuated and therefore cannot be unwound from the supply roll 43 through the band brake 13.

A detachable holding element 39 is described with reference to Figs. 8 and 9, one of which is attached to the rear edge of the stamp 2 for each band 42. The stamp 2 itself has several parallel square tubes 30, which are arranged at a certain distance from one another. The space between two square tubes 30 serves as a band channel for the band 42. A holding element 39 is attached to the stamp 2 for each band 42. A bearing housing 37 is inserted into one of the stamp tubes 30 and fastened with two screws 32. A bearing bolt 38 is rotatably mounted in it, the axial direction of which runs parallel to the longitudinal direction of the square tubes 30 (Fig. 9). At a protruding end, the bearing bolt 38 carries the end of a holding finger with a circular cross-section as a holding element. The holding finger 39 is in its locked normal position, shown in dash-dotted lines in Fig. 8, horizontal and extends on the front side of two square tubes 30 across the space between them. In this normal position, the bearing bolt 38 is locked by means of a pressure bolt 40, which is engaged by a spring (not shown) in a conical recess 41 in the circumference of the bearing bolt 38. The band 42 is guided into its normal position via the holding finger 39, which acts like a deflection roller. If the tensile force of the band 42 perpendicular to the holding finger 39 exceeds a certain value, the latter disengages and the band 42 is released (42' in Fig. 8).

The baler according to the invention works as follows: After a compacted bale has been removed from the press chamber 1 - the stamp 2 is in

its uppermost position, the initial position - the bands 42, the ends of which are guided through the band brake 13, are pulled down from the supply rolls 43, placed over the deflection pins 45 on the front edge of the stamp 2 and then over the holding fingers 39, which assume their disengaged position after a bale has been removed. The holding fingers 39 are locked into their normal position so that the bands 42 run over the holding fingers 39 on the rear edge of the stamp 2. From there, the bands 42 are pulled down at the rear of the baling chamber 1 and pushed from the side under the plastic strips serving as band holders 46. From there, the ends of the bands 42 are guided along the floor of the baling chamber 1 to the front of the baler and secured there in the holders 47. The removal door 5 is closed and the baler is ready for operation.

The material to be pressed is gradually filled in, so the baler also serves as a collecting container for the material to be pressed. When the press chamber 1 is full, the filling flap 6 is closed and the ram 2 is activated. The ram 2 can then be moved back up to its starting position in order to be able to fill in more material to be pressed; the pressing process can be repeated several times.

If the material to be pressed is to be removed, the stamp 2 is stopped in its lower end position at the end of its working stroke. After opening the removal door 5 and the filling flap 6, which releases the band brake 13 when opened, the bands 42 are unwound a little from the supply rolls 43 and cut off so that the ends of the bands 42 placed around the compressed bale can be connected to one another. After the bale has been tied, the stamp 2 is moved upwards to its starting position in an idle stroke, whereby the holding fingers 39 on the rear edge of the stamp 2 disengage and the bands 42 holding the bale together are released. The bale is

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Stamp 2 is pressed out of the baler via an ejector mechanism (not shown) coupled to stamp 2 and the baler can be prepared for refilling and pressing as described.

Claims (9)

S'dnüfzans'prüche " * 1. Baling press, in particular for compressing cardboard boxes and other packaging, with a cuboid-shaped pressing chamber, a stamp working vertically therein and with a filling and removal opening extending from a press base to an upper starting position of the stamp, the lower removal section of which, reaching upwards to a lower end position of the stamp, can be closed by a laterally hinged removal door, characterized in that the upper part of the filling and removal opening, which forms a filling section, can be closed by a filling flap (6) which can be moved upwards to open it. 2. Baler according to claim 1, characterized in that the filling flap (6) is guided on parallel levers (7). 3. Baler according to claim 1 or 2, characterized in that the filling flap (6) is pressed upwards into the open position by at least one spring (51). 4. Baler according to one of claims 1 to 3, characterized in that it has a band brake (13) actuated by the filling flap (6). 5. Baler according to claim 4, characterized in that the band brake (13) has a tube (52) with a round rod (53) that can be rotated therein and a through hole (55) that runs transversely through the tube (52) and the round rod (53) when the band brake (13) is released, the hole section in the round rod (53) being pivoted relative to the hole sections in the tube wall when the band brake (13) is actuated by pivoting the round rod (53). 6. Baler according to claim 4 or 5, characterized
characterized in that the band brake (13) is a
Lever linkage (49, 50) for actuation, which is attached to one of the parallel levers (7) of the flap guide
is articulated. 7. Baler according to one of claims 1 to 6, characterized in that the band brake (13) is arranged above the
Filling and removal opening is arranged and a
Band (42) for binding a compacted bale from a supply roll (43) by the band brake (13)
through, on the ram (2) from front to back, on the back of the press chamber (1) downwards and on its
floor is brought forward again. 8. Baling press according to claim 7, characterized in that the band (42) on the rear edge of the stamp (2) is extended by a locking element which can be locked in a normal position.
Holding element (39) which disengages when a certain tension is applied to the band and releases the band (42). 9. Baler according to claim 8, characterized in that the holding member is a holding finger (39) which can be pivoted at one end about a transverse axis and which preferably has a round cross-section.