GB2117437A - Door closure for waste presses - Google Patents

Abstract

A clamping closure, to be operated by a hand lever (3), provided for locking the door (1) of the press shaft or filling shaft of a baking press (1) for paper waste or the like, comprises a bar (5), eccentrically connected to two attached pivoting pins (4), so adapted that in the locked state it bears on lugs (10) of the shaft door (1). The bar (5) may be attached to the pins (4) via webs to increase the eccentricity of the bar. <IMAGE>

Description

SPECIFICATION Door closure for waste presses The invention relates to door locking means accord ing to the preamble of ciaim 1.

Locking bars of the kind described have been adequately known for a long time, not only in practice but also from the prospectus leaflets of the firm of HSM-Pressen GmbH, Salem, and they are constructed so that the two pivoting pins at the ends are produced eccentrically with respect to the longitudinal side of the bars by mechanical machining through turning. Apart from the labour-intensive mechanical machining there is also the disadvantage of the machining waste and the fact that the maximum eccentricity between pivoting pin and bar section is limited by the initial diameter thereof.

Since locking closures of this kind must also satisfy the requirement that the press shaft door must bear on the locking barforthe longest possible phase of the opening operation to avoid the door being flung forward against the operator owing to the press bale springing open briefly when said door is opened, lugs or the like have been attached in known manner to the appropriate door and are released from the eccentric bar section only towards the end of the pivoting phase of the hand lever. In known constructions this involves additional mechanical machining of the eccentric part of the bar, namely the provision of milled portions through which the lugs can enter at the end of the pivoting motion.

The present innovation commences with this prior art with the object of creating for press shaft doors a locking device which can be produced in a simple manner without any mechanical machining operation and with any desired eccentricity from commercial sectional steel.

This problem is solved by the steps disclosed in the patent claims. The drawing shows exemplified embodiments of the invention which are also explained in detail by reference to the said drawing.

In the drawing: Figure 1 is a plan view of a locking device according to the invention, Figure 2 is a side view relating to Figure land Figure 3 is a plan view, being an alternative to Figure 1.

In the locking system illustrated in Figures 1 and 2, the door 1, associated with the waste baling press 2, indicated merely by contour lines, is provided with lugs 10, latched in known manner on the door end face situated opposite to the bearing 11, a locking bar 5, extending eccentrically by dimension e in relation to the pivoting pins 4, bearing on said lugs 10 in the locked state. Both pivoting pins 4 are also retained in known manner in bearings 6 which in turn are situated at the end of lugs 7 or the like and are attached together therewith on the outside of the press 2.The hand lever 3, attached to the eccentric bar portion is provided for operation, for example for unlocking and therefore opening the door 1, said hand lever having to be pivoted along the curved trajectory 81 into its limiting position after the pawl or lock 12 is released so that the eccentric bar member 5, which simultaneously moves upon the curved trajectory 82, is abie to move into its limiting position 5' and immediately prior thereto is able to release the lugs 10, so that the door 1 pivots by means of the lugs 10 about its bearing 11 along the curved trajectory B3 past the eccentric 5 which is then situated at the position 5'.It is essential to the invention that the two pivoting pins 4 are mounted in a structurally simple manner on the free ends of the contiguous bar member 5 which is situated eccent rially with respect to the pivoting axis x. This not only dispenses with the conventional and very labour-intensive mechanical working of pivoting pins and recesses from solid material to allow the door lugs 10 to pass through at the end of the opening procedure but the magnitude of the eccentricity e can be selected as desired by appropriate choice of material. It therefore follows as a further advantage that no close manufacturing tolerances need be maintained for this door closure, a feature which was hitherto very difficult and therefore also expensive for the welded structures conventionally used for such presses.In the embodiment according to the invention, the free space F, hitherto obtained only by milling from the solid material and required for the entry of the lugs 10 at the end 5' of the pivoting trajectory B2 of approximately 270 is obtained automatically by virtue of pivoting pins 4 being welded to the actual locking bar 5 outside the region of lugs 10.

Figure 3 finally merely indicates that the magnitude of the eccentricity can be altered by connecting the pivoting pins 4 to the eccentrically disposed bar member by interposing webs 8. Finally, it is also within the nature of the present invention that the pivoting pin 4 and the eccentric bar member 5 are constructed integrally and are formed by offsetting the region disposed between pins 4.

1. A locking device for the press shaft door of waste baiing presses of upright or horizontal construction in which a locking bar of eccentric construction and adapted to be pivotally supported at both ends on the press shaft can be brought into and out of engagement with the press shaft door, characterised in that both pivoting pins (4) are mounted laterally on the free ends of the contiguous bar member (5) which is situated eccentrically with respect to the pivoting axis (x).

2. Locking device according to claim 1, characterised in that the pivoting pins (4) are connected to the eccentrically disposed bar member by the interposition of webs (8).

3. Locking device according to claim 1, characterised in that the pivoting pin t4) and the eccentric bar member (5) are integrally constructed and are formed by offsetting the region situated between the pins (4).

**WARNING** end of DESC field may overlap start of CLMS **.

Claims (3)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Door closure for waste presses The invention relates to door locking means accord ing to the preamble of ciaim 1. Locking bars of the kind described have been adequately known for a long time, not only in practice but also from the prospectus leaflets of the firm of HSM-Pressen GmbH, Salem, and they are constructed so that the two pivoting pins at the ends are produced eccentrically with respect to the longitudinal side of the bars by mechanical machining through turning. Apart from the labour-intensive mechanical machining there is also the disadvantage of the machining waste and the fact that the maximum eccentricity between pivoting pin and bar section is limited by the initial diameter thereof. Since locking closures of this kind must also satisfy the requirement that the press shaft door must bear on the locking barforthe longest possible phase of the opening operation to avoid the door being flung forward against the operator owing to the press bale springing open briefly when said door is opened, lugs or the like have been attached in known manner to the appropriate door and are released from the eccentric bar section only towards the end of the pivoting phase of the hand lever. In known constructions this involves additional mechanical machining of the eccentric part of the bar, namely the provision of milled portions through which the lugs can enter at the end of the pivoting motion. The present innovation commences with this prior art with the object of creating for press shaft doors a locking device which can be produced in a simple manner without any mechanical machining operation and with any desired eccentricity from commercial sectional steel. This problem is solved by the steps disclosed in the patent claims. The drawing shows exemplified embodiments of the invention which are also explained in detail by reference to the said drawing. In the drawing: Figure 1 is a plan view of a locking device according to the invention, Figure 2 is a side view relating to Figure land Figure 3 is a plan view, being an alternative to Figure 1. In the locking system illustrated in Figures 1 and 2, the door 1, associated with the waste baling press 2, indicated merely by contour lines, is provided with lugs 10, latched in known manner on the door end face situated opposite to the bearing 11, a locking bar 5, extending eccentrically by dimension e in relation to the pivoting pins 4, bearing on said lugs 10 in the locked state. Both pivoting pins 4 are also retained in known manner in bearings 6 which in turn are situated at the end of lugs 7 or the like and are attached together therewith on the outside of the press 2.The hand lever 3, attached to the eccentric bar portion is provided for operation, for example for unlocking and therefore opening the door 1, said hand lever having to be pivoted along the curved trajectory 81 into its limiting position after the pawl or lock 12 is released so that the eccentric bar member 5, which simultaneously moves upon the curved trajectory 82, is abie to move into its limiting position 5' and immediately prior thereto is able to release the lugs 10, so that the door 1 pivots by means of the lugs 10 about its bearing 11 along the curved trajectory B3 past the eccentric 5 which is then situated at the position 5'.It is essential to the invention that the two pivoting pins 4 are mounted in a structurally simple manner on the free ends of the contiguous bar member 5 which is situated eccent rially with respect to the pivoting axis x. This not only dispenses with the conventional and very labour-intensive mechanical working of pivoting pins and recesses from solid material to allow the door lugs 10 to pass through at the end of the opening procedure but the magnitude of the eccentricity e can be selected as desired by appropriate choice of material. It therefore follows as a further advantage that no close manufacturing tolerances need be maintained for this door closure, a feature which was hitherto very difficult and therefore also expensive for the welded structures conventionally used for such presses.In the embodiment according to the invention, the free space F, hitherto obtained only by milling from the solid material and required for the entry of the lugs 10 at the end 5' of the pivoting trajectory B2 of approximately 270 is obtained automatically by virtue of pivoting pins 4 being welded to the actual locking bar 5 outside the region of lugs 10. Figure 3 finally merely indicates that the magnitude of the eccentricity can be altered by connecting the pivoting pins 4 to the eccentrically disposed bar member by interposing webs 8. Finally, it is also within the nature of the present invention that the pivoting pin 4 and the eccentric bar member 5 are constructed integrally and are formed by offsetting the region disposed between pins 4. CLAIMS

1. A locking device for the press shaft door of waste baiing presses of upright or horizontal construction in which a locking bar of eccentric construction and adapted to be pivotally supported at both ends on the press shaft can be brought into and out of engagement with the press shaft door, characterised in that both pivoting pins (4) are mounted laterally on the free ends of the contiguous bar member (5) which is situated eccentrically with respect to the pivoting axis (x).

2. Locking device according to claim 1, characterised in that the pivoting pins (4) are connected to the eccentrically disposed bar member by the interposition of webs (8).

3. Locking device according to claim 1, characterised in that the pivoting pin t4) and the eccentric bar member (5) are integrally constructed and are formed by offsetting the region situated between the pins (4).