EP1048449B1 - Shaft door for a baling press of vertical type - Google Patents

Abstract

The press shaft door (2) has a guide consisting of two guide track units by which the feeder shaft door (4) is slid parallel with the plane of the press shaft door between closed and open positions. The feeder shaft door in an open position is completely ins the outer dimensions of the press shaft door. Each vertical end side of the feeder shaft door has at least one track following b guided by a guide track of the guide track unit.

Description

The present invention relates to a landing door for a baler, according to the preamble of claim 1 and a baler with such a landing door.

From DE 297 042 76 01 a baler is known, which has a Preßschachttür and located above the filler opening, which can be closed by means of a hopper door. The filling shaft door is guided displaceably above the press shaft door in guide rails fastened to the press housing, so that it can be moved upwards to open the filling shaft opening. The guide rails extend over the lid of the Press housing away to the top, so that this known baler always requires such a space in which there is enough space above the baler. However, designed as a sliding door inlet shaft door of this baler has the advantage that no forward swing away Einfüllschachttür is present, which can be annoying when filling the substances to be compressed in the hopper.

From DE 94 01 138 U a baler is known in which a filler opening closing the filling flap is mounted on pivoting parallel levers. To open the filler flap selbige is performed using the parallel lever on a circular arc.

Furthermore, from DE 195 45 766 A a baling press with a filling shaft opening closing the filling shaft door is known, which consists of two pivotable about horizontal axes flap parts. To open the hopper door, the two initially lying in a plane flap parts are pivoted down to a horizontal position. Subsequently, the free flap part can be folded down into a vertical position.

Whenever there is little space available to set up a baler, it is necessary to keep the overall height of the baler as low as possible.

It is therefore an object of the present invention to provide a landing door for a baler and a baler with such a landing door, which is as compact as possible while ensuring the benefits of designed as a sliding door entry shaft door.

According to the invention, a shaft door for a baler, consisting of a press shaft door with a hopper opening provided above this and a hopper door, by means of which the filling shaft opening can be closed, to design such that at least at the Preßschachttür a guide means is provided, by means of which the hopper door is displaceable substantially parallel to the door plane of the press shaft door between a closed position and an open position, wherein the hopper door comes to rest in the open position substantially within the lateral outer dimensions of the Preßschachttür. Trained as a sliding door chute door is thus pushed to close the hopper opening from bottom to top.

The shaft door according to the invention has the advantage that the pitch of the baler neither broader nor higher than the corresponding outer dimensions of the press housing, which must be substantially equal to the width or height of the press shaft door. In the fully open position, the hopper door is below the hopper opening on the outside of the hopper door. Since the hopper door is not pivoted forward, but moved down, the handling of the substances to be compacted immediately before the baler is not hindered by a too far projecting hopper door. Moreover, the material contained in the baler is not trapped when closing the hopper door and during closing in the interior of the Press pushed. Since the hopper door in the open position is indirectly in front of the Preßschachttür and the top of the hopper door can come to lie approximately at the same height as the lower edge of the hopper opening, advantageously a work table is formed whose depth is substantially the sum of the Thickness of the hopper door and the press shaft door corresponds. A work table formed in this way does not protrude so far from the front of the baler, as a hopper door swiveled 90 ° about a horizontal axis.

The guide device for the filling shaft door preferably consists of two guide track units, which are each arranged vertically extending in the laterally outer regions of the press shaft door. The filling shaft door has on each of its lateral end faces at least one tracking body, which is guided in a guide track of the respective guide track unit. The track followers are located in the upper portion of the hopper door and the track is such that the hopper door is displaced forward during opening by an amount slightly greater than the largest thickness of the hopper door.

The filler shaft door can rest in the closed position at least with parts of its lower edge on the upper edge of the feed slot opening and thereby held in the latter. Preferably, however, the hopper door is guided not only in its upper portion but also in its lower portion. For this purpose, two further guideways can be provided, in which two further tracking bodies are guided. These further tracking bodies are arranged in the lower region of the feed slot door and can be supported vertically within the two guide track units, so that support of the feed slot door on the upper edge of the feed shaft opening is not required.

Each guideway unit may consist of three separate guideway bodies, whose geometry predetermines the guideways for the arranged in the upper and lower part track body of the hopper door. However, the guideway units may also be integrally formed, so that the guideways not arise only by mounting the individual guideway body on the Preßschachttür.

In an advantageous embodiment of the invention, the lowermost guideway body in its lower region on a stop that holds the hopper door in the open position. If the hopper door does not rest on the lower edge of the hopper opening in the closed position, then the lowermost guide track body may additionally be provided with a stop in its upper area, which holds the hopper door in the closed position.

The guide track each leading the upper track body extends directly to the outside of the Preßschachttür zoom, so that the local area of the Preßschachttür forms a stop for the respective upper tracking body on which it rests in the closed position of the hopper door and which substantially the fulcrum represents the occurring at the beginning of the opening of the hopper door pivoting movement. This pivotal movement is required to first move the lower portion of the hopper door sufficiently far out of the hopper opening to the front, so that the hopper door can then be pushed down or lowered.

With the help of a preferably arranged in its lower region locking device, the hopper door can be locked to the press shaft door. The locking device may for example consist of two hinged at the hopper door closure levers, which can be brought by pivoting in a locked position in which they engage with locking elements which are attached to the press shaft door. In this case, the actuation of the locking lever can be carried out independently of each other, however, a connecting rod connecting the two locking levers is preferably provided which allows simultaneous unlocking of the locking lever. Immediately after unlocking the connecting rod, the hopper door can be brought into its open position using exactly this rod. For this purpose, the connecting rod is pulled a little forward and then pressed down or lowered.

In order to close the hopper door again, it is expedient to arrange in its lower region a horizontally extending actuating rod, with the aid of which the hopper door can be raised from bottom to top in the closed position. Although the connecting rod between the shutter levers would basically also for Close the chute door suitable, but it would be an additional operating effort and greater care necessary so that the locking mechanism of the locking device engages reliably.

According to the invention, the two shutter levers can be mounted on the actuating rod, so that the longitudinal axis of the actuating rod forms the fulcrum for the pivotal movement of the shutter lever.

Since the hopper door has a significant weight, it is connected to a weight-balancing mechanism, advantageously with at least one counterweight, the hopper door hanging on one end of a flexible connecting member, which is guided over a deflecting body, and the counterweight at the other end of the Connecting member is attached. The counterweight or counterweights are chosen so that they correspond approximately to the weight of the hopper door. Such a weight-neutral suspension of the hopper door makes it possible that the vertical position of the hopper door can be adjusted continuously to the level of the compression chute. Incidentally, of course, the opening and closing of the hopper door is greatly facilitated. Preferably used two counterweights, which are embedded vertically displaceable in the two vertically extending hollow door frame profiles, preferably 4-Kantrohre, the press shaft door. As a result, the counterweights are on the one hand not visible and on the other hand do not take up any space outside the press shaft door.
Instead of the counterweight, tension springs, gas springs, pneumatic or similar means may be used according to necessity.

With very narrow space ratio for the installation and operation of a vertical baler allows the present new basic principle for the design of a landing door also that the hopper door can be sunk after appropriate design of the press shaft door in selbiger.

Figur 1

eine Aufsicht auf eine erfindungsgemäße Schachttür;

Figur 2

eine Ansicht der Einzelheit E gemäß Fig.1;

Figur 3

eine Schnittansicht gemäß Schnitt A-A in Fig.2, wobei sich die Einfüllschachttür in ihrer vollständig geschlossenen Stellung befindet;

Figur 4

eine Schnittansicht gemäß Schnitt A-A in Fig.2, wobei sich die Einfüllschachttür in ihrer nach vorne geschwenkten Stellung befindet;

Figur 5

eine Schnittansicht gemäß Schnitt A-A in Fig.2, wobei sich die Einfüllschachttür in einer noch teilweise geschlossenen, parallel zur Preßschachttür nach vorne versetzten Stellung befindet;

Figur 6

eine Schnittansicht gemäß Schnitt A-A in Fig.2, wobei sich die Einfüllschachttür in ihrer vollständig geöffneten Stellung befindet;

Figur 7

eine Schnittansicht gemäß Schnitt B-B in Fig.6, die um 90° gedreht wurde;

Figur 8A

eine Ansicht eines Teils der Einfüllschachttür;

Figur 8B

eine Seitenansicht der Einfüllschachttür gemäß Fig.8A;

Figur 9A

eine Ansicht eines Teils der Preßschachttür mit einer erfindungsgemäßen Führungsbahneinheit;

Figur 9B

eine Seitenansicht der Preßschachttür gemäß Fig.9A

Hereinafter, an embodiment of the present invention will be described by way of example with reference to the accompanying drawings. Show it:

FIG. 1

a plan view of a shaft door according to the invention;

FIG. 2

a view of the detail E of Figure 1;

FIG. 3

a sectional view taken along section AA in Figure 2, wherein the hopper door is in its fully closed position;

FIG. 4

a sectional view taken along section AA in Figure 2, wherein the hopper door is in its forward pivoted position;

FIG. 5

a sectional view taken along section AA in Figure 2, wherein the hopper door is in a still partially closed, parallel to the press shaft door forward position offset;

FIG. 6

a sectional view taken along section AA in Figure 2, wherein the hopper door is in its fully open position;

FIG. 7

a sectional view along section BB in Figure 6, which has been rotated by 90 °;

Figure 8A

a view of part of the hopper door;

FIG. 8B

a side view of the hopper door according to Fig.8A;

Figure 9A

a view of a portion of the press shaft door with a guideway unit according to the invention;

FIG. 9B

a side view of the press shaft door according to Fig.9A

Figure 1 shows the front view of a shaft door 1 according to the invention, which is articulated on its right side to the housing 24 of the baler that it can be pivoted about a vertical axis of rotation. In particular, the shaft door 1 consists of a press shaft door 2 with a door frame consisting of two vertical door frame profiles 23 and two horizontal door frame profiles 25. In the upper half of the press shaft door 2, a filler shaft opening is provided, which is closed by a feed shaft door shown in its closed position in FIG is. After opening the hopper door 4, the hopper opening is released and the material to be destroyed can be filled into the hopper of the baler.

The Preßschachttür 2 here has the width B and the height H. The filling shaft door 4 is in each of its positions, in particular in the fully open position, substantially within this lying in the door plane of the landing door 1 dimension B and also preferably still within the dimension H.

Figure 2 shows the detail _" E" of Figure 1. It is the door frame profiles 23 and 25, preferably 4-Kantrohre, the Preßschachttür 2 to recognize. In addition, located in the closed position the hopper door 4 is shown. The shaft door 1 is otherwise mirror-symmetrical to its vertical central axis, so that the detail "E" is present in mirror-symmetrical shape in the right upper half of the shaft door 1, but in detail without the shown in Figure 7 and later described approach switch 37.

FIG. 3 shows the section AA according to FIG. 2. It can be seen the press shaft door 2 with the upper horizontal door frame tube 25. The filling shaft door 4 closes the filling shaft opening 3. Behind the drawing plane of FIG. 3 are three guide track bodies 5, 6 and 7, which are fastened to the vertically extending door frame tube 23, as in FIG. 2 can be seen. The guideway bodies 5, 6 and 7 may be individual parts in the form of sufficiently thick metal sheets, but they may also be formed as a single integral component in which the guideways 9 and 10 are incorporated.

In the embodiment shown, the guideway 9 is essentially formed by the guideway body 6. At least in its upper region, which extends obliquely downwards from the door frame tube 25, the guideway 9 is bounded on both sides, namely upwardly from the guideway body 5 and downwardly from the guideway body 6. Preferably, the guideway 9 is also in its vertically extending section bounded on both sides, namely on the one hand by the guideway body 6 and a guideway cover 26, which may be a sheet, which is attached to the guideway bodies 5,6 and 7. As well as the guideway 9, the guideway 10 is bounded on both sides both in its upper substantially horizontally extending portion and in its vertically extending portion, namely on the one hand by the lower portion of the guideway body 6 and the upper portion of the guideway body 7 and on the other hand by the guideway cover 26 and the guideway body 7.

As can be seen in Figures 2 and 3, the feed slot door 4 consists of a substantially U-shaped jacket plate, at its two end faces in each case a support plate 27 is attached. As shown in Figure 3, the support plate 27 is formed approximately S-shaped, with its upper S-turn of the U-shape of the jacket plate of the feed slot door 4 is adjusted. The support plate 27 thus stiffens the lateral outer regions of the jacket plate.

The two carrier plates 27 each carry 2 tracking bodies in the form of two spur wheels 8 and 11. The spur wheels 8 and 11 are rotatably mounted on the wheel axles 28 and 28 'which are carried by the carrier plate 27. The movement of the upper track wheel 8 is guided by the guide track 9, while the movement of the lower track wheel 11 is guided by the guide track 10.

In the closed position of the filling shaft door 4 shown in FIG. 3, its own weight is borne by the stop 13, which is formed at the upper end of the guideway body 7 and delimits a part of the horizontally extending section of the guideway 10. In this case, the lower track wheel 11 is supported on the stop 13.

In particular, in Figure 3 and in Figures 8A and 8B, the locking device is shown, by means of which the hopper door 4 can be locked in its closed position on the Preßschachttür 2. The locking device has a toggle lever-like locking lever 15 which is pivotally mounted on an actuating rod 19. The actuating rod 19 is held at its two ends by one of the support plates 27. An equally supported by the support plate 27 stop screw 29 protrudes into a provided in the lock lever 15 slot 30 whose center line is the arc of a circle with a center which coincides with the longitudinal axis of the actuating rod 19. The stop screw 29 thus determines the maximum possible pivot angle by which the shutter lever 15 can be pivoted about the longitudinal axis of the actuating rod 19.

On the closure lever 15, a closure recess 16 is provided which engages in the locked position from above via a locking pin 31 which is fixed to the Preßschachttür 2 and can be clearly seen in Figures 3-6 and 9A. In the locked position of the shutter lever 15 shown in Figure 3 is thus prevented that the hopper door 4 forward, that is in Fig. 3 after left, moved out of the feed slot opening 3. It when the two shutter levers 15 are connected to each other via a connecting rod 18 so that they can be simultaneously pivoted by moving the connecting rod 18 forward or backward is particularly advantageous.

The opening of the filling shaft door 4 will be described below with reference to FIGS. 3 to 6.

The filling shaft door 4 is first unlocked by the connecting rod 18 is pulled to the front or in Figure 3 to the left. As a result, the shutter lever 15 pivots counterclockwise about the longitudinal axis of the operating rod 19 and the shutter recess 16 releases the locking pin 31. After the pivotal movement of the shutter lever 15 is stopped by the stopper screw 29, the connecting rod 18 is further pulled forward, so that the lower track wheel 11 in the horizontal portion of the guide track 10 to the front or in Figure 3 rolls to the left, as shown in Figure 4 , During this rolling movement, the upper track wheel 8 does not move substantially, but its wheel axle 28 serves as a fulcrum for the pivotal movement of the hopper door 4 in a clockwise direction. The filling shaft door 4 thus performs a pure rotational movement until it is in the position shown in FIG. The swing angle of this movement is in the range between approximately 3 ° and 10 °.

The next movement section when opening the hopper door 4 is shown in FIG. Starting from the position shown in Figure 4, the connecting rod 18 is further pulled forward or left, so that the lower track wheel 11, the curve between the horizontal portion and the vertical portion of the guideway 10 according to the arrow P ₁ 'passes. At the same time, the upper track wheel 8 moves along the inclined portion of the guide track 9 according to arrow P ₁ down. If the upper track wheel 8 finally passes beyond the end of the inclined section of the guide track 9 in the vertical section of the guide track 9, then the feed slot door 4 is in a position partially closing the feed slot opening 3 according to FIG. 5. During the transition from the one shown in FIG 4 position shown in Figure 5, the hopper door 4 performs a translational movement, which is superimposed by a rotational movement. In Figure 5 can be clearly seen that the feed slot door 4 is offset when opening from the door level of the Preßschachttür 2 forward or to the left.

To bring the hopper door 4 from the position shown in Figure 5 in the fully open position shown in Figure 6, it is only moved vertically down, with the spur wheels 8 and 11 along the vertically extending portions of the guideways 9 and 10, respectively the lower track wheel 11 abuts against the stop 12 at the lower end of the vertical portion of the guide track 10. In addition, a stopper 32 may be provided at the lower end of the vertical portion of the guide track 9 stopping the upper track wheel 8 in the position shown in FIG. During the transition from the position shown in Figure 5 to the position shown in Figure 6, the hopper door 4 performs a pure translational movement.

In Figure 6 it can also be seen that the upper edge 33 of the hopper door 4 and the lower edge 34 of the hopper opening 3 are aligned in the fully open position and the surfaces of the upper edge 33 and the lower edge 34 form a work table with sufficient depth.

The surface of this work table can be seen well in the view of FIG. To cover the between the Einfüllschachttür 4 and the Preßschachttür 2 resulting gap, a cover plate 35 may be provided in the front region of the lower edge 34, which is shown in Figure 7. This prevents parts of the material to be filled from jamming in the gap.

FIG. 7 also shows a dot-dashed edge profile 36 of the press housing, on which a proximity switch 37 is arranged. The proximity switch 37 may be an inductive proximity switch, a reed contact switch or similar switches which, upon removal of a switch flag 38 from the proximity switch 37, provide a signal to the machine controller according to which the press drive is shut down for safety reasons. As a switching lug 38, for example, serve a coded magnet. An essential feature of the proximity switch 37 is that it has a tolerance zone in which the switching flag 38 can move without the press drive is shut down. As can best be seen in FIG. 2, the switching lug 38 is located on a carrier bar 39, which is designed as an extension of the wheel axle 28 of the lower lug wheel 11. The switching lug 38 protrudes to the left beyond the door frame tube 23 and is located in the closed position of the hopper door 4 in the tolerance zone of the proximity switch 37, if the press shaft door 2 is closed.

Particularly advantageous is the position of the hopper door 4 set when it is suspended with neutral weight. As can be seen in FIGS. 8A and 8B as well as in FIG. 2, a cable attachment disk 40, which is attached to the cable 21, is attached to the upper track wheel 8 for this purpose. Instead of the cable 21, other flexible connecting members could be used, such as chains or the like. The cable 21 is guided over a deflecting body in the form of a pulley 22, which is attached to the upper end of the guideway body 5. From the rope pulley 22, the rope 21 extends into the hollow door frame tube 23 and holds therein a counterweight 20 displaceable within the door frame tube 23, as can be seen in FIG. A counterweight 20 is preferably located in both vertically extending door frame tubes 23. The size of the counterweights 20 corresponds approximately to the weight of the feed slot door 4. This allows the stepless adjustability of the position of the feed slot door 4. Due to the friction between the guideways 9 and 10 and the spur wheels 8 and 11 and between the rope 21 and the rope pulley 22 is the system consisting of filling shaft door 4, rope 21, pulley 22 and counterweights 20 self-locking. Another advantage of the cable suspension is that the feed slot door 4 is always pulled in the positions shown in Figures 5 and 6 of the rope 21 in the direction of the Preßschachttür 2, so that the guideway cover 26 has to take over substantially no supporting function.

If the filling shaft door 4 is to be closed again starting from the position shown in FIG. 6, this can be pulled upwards on the actuating rod 19 for this purpose. The geometry and / or mass distribution of the shutter lever 15 is advantageously chosen such that its center of gravity is always behind or in Figures 3 to 6 always right of its pivot axis, in the case of the embodiment shown, ie behind or right of the longitudinal axis of the actuating rod 19 , This ensures that the closure recess 16 engages over the locking pin 31 when closing the filling shaft door 4. Alternatively or additionally, the closure lever 15 can of course also be biased with spring elements in the locked position. The provided on the shutter lever 15 buffing surface 41 ensures, moreover, that the Closing lever 15 when closing the hopper door 4 of the locking pin 31 is rotated counterclockwise until the locking recess 16 can engage from above the locking pin 31.

In FIGS. 9A and 9B, a part of the press shaft door 2 is shown together with the guide track bodies 5, 6 and 7. In particular, the stops 12, 13, 14 and 32 can be seen in FIG. 9B.

In particular, in Figures 3 and 7 are arranged on the inside of the hopper door 4 spacer strips 42 can be seen, which ensure that during the pressing process no material pushes through the gap between the hopper door 4 and the ram.

References directory

• 1 landing door
• 2 press-shaft door
• 3 filling shaft opening
• 4 filling shaft door
• 5 guide device
• 6 guide device
• 7 guide device
• 8 tracking body
• 9 guideway
• 10 more guideway
• 11 further tracking body
• 12 stop (open)
• 13 stop (closed)
• 14 stop
• 15 locking lever
• 16 locking recess
• 18 connecting rod
• 19 operating rod
• 20 counterweight
• 21 flexible connecting element
• 22 deflecting body
• 23 door frame tube (vertical)
• 24 housing of the baler
• 25 door frame tube (horizontal)
• 26 guideway cover
• 27 carrier plate
• 28, 28 'wheel axles
• 29 stop screw
• 30 slot
• 31 stop bolts
• 32 stop
• 33 upper edge (filling shaft door)
• 34 lower edge (filling shaft opening)
• 35 cover plate
• 36 edge profile
• 37 proximity switch
• 38 switching flag
• 39 carrier bar
• 40 rope fixing disc
• 41 Baking surface
• 42 spacer strips
• A-A section along the line 'A-A'
• B-B section along the line 'B-B'
• B width (from pos. 2 and / or pos. 24)
• H height (from pos 2 and / or pos 24)
• P ₁ , P ₁ 'arrow direction (direction of movement)

Claims (16)

1. Shaft door for a bale press, consisting of

   - a press shaft door (2) with a filling shaft opening (3) and

   - a filling shaft door (4) by means of which the filling shaft opening (3) is closable,

   characterised in that a guide device (5, 6, 7) with the help of which the filling shaft door (4) is displaceable substantially parallel to the door plane of the press shaft door (2) between closed setting and opened setting is provided at least at the press shaft door (2), wherein the filling shaft door (4) and the opened setting comes to lie substantially within the lateral external dimensions of the press shaft door (2).
2. Shaft door according to claim 1, characterised in that the filling shaft door (4) disposed in the lower position and the press shaft door (2) together form by their respective upper edges a work table, the depth of which substantially corresponds with the sum of the thicknesses of the two doors (2 and 4).
3. Shaft door according to claim 1, characterised in that the guide device consists of two guide track units (5, 6, 7), which are arranged to each be vertically extending at the outer regions of the press shaft door (2), and the filling shaft door (4) has at each of its vertically extending end faces at least one respective track following body (8) which is guided by a guide track (9) of the respective guide track unit (5, 6, 7).
4. Shaft door according to claim 3, characterised in that each guide unit consists of three guide track bodies (5, 6, 7), which are arranged substantially one below the other and which define the guide track (9) and a further guide track (10), and a further track following body (11) guided by the further guide track (10) is provided at each end face of the filling shaft (4).
5. Shaft door according to claim 4, characterised in that the lowermost guide body (7) has in its lower region an abutment (12) which keeps the filling shaft door (4) in the opened setting.
6. Shaft door according to claim 4 or 5, characterised in that the lowermost guide body (7) has in its upper region an abutment (13) which keeps the filling shaft door (4) in the closed setting.
7. Shaft door according to one of claims 3 to 6, characterised in that the guide track (9) runs up to a region of the press shaft door (2), which forms an abutment (14), against which the track following body (8) bears in the closed setting and which substantially represents the fulcrum of the pivot movement occurring at the start of the opening of the filling shaft door (4).
8. Shaft door according to one of the preceding claims, characterised in that the filling shaft door (4) has a locking device by means of which it is lockable to the press shaft door (2).
9. Shaft door according to claim 8, characterised in that the locking device consists of two closing levers (15), which are pivotably connected with the filing shaft door (5), each with a respective closing recess (16), wherein the respective closing lever (15) can be brought by pivotation into a locked setting in which the respective closing recess (16) at least partly engages in front of a respective detent pin (31) fastened to the press shaft door (2).
10. Shaft door according to claim 9, characterised in that the two closing levers (15) are connected together by means of a connecting rod (18) so that they can be actuated simultaneously.
11. Shaft door according to one of the preceding claims, characterised in that an actuating rod (19) for raising the filling shaft door (4) from the opened setting to the closed setting is arranged in the lower region of the filling shaft door (4).
12. Shaft door according to claim 11 in conjunction with claim 9, characterised in that the closing lever (15) is mounted on the actuating rod (19) so that the longitudinal axis thereof forms the fulcrum of the closing lever (15).
13. Shaft door according to one of the preceding claims, characterised in that at least one weight-compensating mechanism is provided at the press shaft door (2), the mechanism being connected with the filling shaft door (4) and being operatively connected with the latter (4).
14. Shaft door according to claim 13, characterised in that the weight-compensating mechanism is at least one counterweight (20) which is connected with the filling shaft door (4) by means of a flexible connecting element (21) guided over a deflecting body (22).
15. Shaft door according to claim 14, characterised in that the counterweight (20) hangs at the connecting element (21) in a vertically extending, hollow door frame profile member (23) of the press shaft door (2) to be vertically displaceable.
16. Bale press for producing compacted waste material bales, consisting of a press housing, which bounds the press shaft, with shaft opening and a shaft door (1) closing the shaft opening, characterised in that the shaft door (1) is constructed according to one of the preceding claims.

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