GB2145968A

GB2145968A - Baling press

Info

Publication number: GB2145968A
Application number: GB08421953A
Authority: GB
Inventors: Hermann Lange; Boto Kritzner; Gottfried Hohlfeld; Klaus Oliva; Frank Sodan
Original assignee: VEB Kombinat Fortschritt Landmaschinen Neustadt (Bestand)
Current assignee: VEB Kombinat Fortschritt Landmaschinen Neustadt (Bestand)
Priority date: 1983-09-05
Filing date: 1984-08-30
Publication date: 1985-04-11
Also published as: GB8421953D0; FR2551312A1; FR2551312B1; IT1224664B; DD217130A1; IT8448797A0; DE3430576A1

Abstract

A press comprises a piston (2) which is guided by rollers (8, 9) in a channel (1). To ensure stable guidance of the piston guide rails (7) are arranged in the channel (1), a first one of which is mounted on a blade side of the piston at the base of the channel and which guides two rollers (9) with vertical axes and one roller (8) with a horizontal axis. A second rail (7), which guides a roller (8) with a horizontal axis, is fastened to the channel side wall at the blade side at the height of the upper edge of the piston (2). A third rail (7) is arranged at the other side wall of the channel and guides two rollers (8) with horizontal axes, one of which runs in the third rail and the other of which runs on the rail. <IMAGE>

Description

SPECIFICATION Baling Press The present invention relates to a press, especially a press for pressing hay, straw and the like.

Presses with pistons guided by rollers are known in different constructions, wherein the rollers are rotatable about horizontal and vertical axes and run on webs or profiles or in longitudinal grooves of a press channel. All these known constructions have the disadvantage that the setting of the rollers and/or associated guide rails is expensive and problems arise in production and in delivery of spares.

In DE-AS 1151144 there is disclosed a piston press in which is arranged a series of rollers providing correct support for the piston during movement thereof to and fro, the support being independent of the position of the piston in the chennel in which it operates. For setting of the piston, means and provided to compensate for tolerances in the parts of the channel and to enable a blade disposed at the piston to be brought into an exact working relationship to a shearing strip arranged at the channel.

The disadvantages of a construction of that kind are the considerable effort required for setting of the rollers and guide rails, the large number of rollers and the necessary accuracy of the production of the channel at the side of the piston blade and the shear strip.

In a further construction described in FR-PS 1 168 991, a bale press has bevelled or wedgeshaped rails which are arranged in the press channel and along which run rollers fastened to the piston and matched to the rail shape. This construction entails considerable work for the production of the rails and adaptation of the rollers thereto. Moreover, setting of the piston in the press channel without working play over its entire length is very difficult.

It would thus be desirable to provide a press in which a press piston is guided by a minimum number of rollers without setting of the same in the channel and without susceptibility of the piston to canting in spite of production tolerances, manufacturing costs preferably being kept low.

According to the present invention there is provided a baling press comprising means defining a guide channel, a press piston reciprocatingly displaceable along the channel and provided with a cutter in the region of one of the side walls of the channel and at an end of the piston leading in the direction of a working stroke thereof, a plurality of channel-section guide rails arranged in the guide channel and comprising a first rail extending along the base of the channel in the region of said one side wall, a second rail extending along said one side wall in the region of an upper side of the piston and a third rail extending along the other one of the side walls of the channel, and a plurality of guide rollers mounted on the piston and comprising a first roller rotatable about a horizontal axis and arranged in the region of said end of the piston to run in the first rail, a second and a third roller each rotatable about a vertical axis and arranged to run in the first rail, a fourth roller rotatable about a horizontal axis and arranged in the region of the other end of the piston to run in the second rail, and a fifth and a sixth roller rotatable about respective horizontal axes and arranged to run respectively in and on the third rail, the sixth roller being closer than the fifth roller to said other end of the piston.

In a preferred embodiment, the first rail is arranged on the blade side at the bottom of the guide channel and guides two rollers with vertical axes and one roller with a horizontal axis at the front end of the lower edge of the piston, the second rail is arranged at the side wall of the channel at the blade side and guides a roller which has a horizontal axis and which is arranged at the upper edge of the piston in direction of drive means therefor, and the third rail is fastened to the chan nel wall opposite to the blade side and guides two rollers with horizontal axes, one of which is arranged in direction of the drive means and moves on the third rail and the other one of which is arranged in direction of the front end face of the piston and moves in the third rail.Through the position of the rollers relative to the guide rails, formed as U-profiles, in the press channel there is provided a secure guidance of the piston so that it is easily movable during its reciprocating movement and cannot turn in any axis necessary for its guidance, the bearing contact being statically defined in each notional axis. With this arrangement of the guide rails in the channel and the use of a minimum number of rollers on the piston, it is possible, in the case of an adjustable angle blade at the front end of the piston, to achieve a minimum blade gap without additional setting of the rollers and guide rails.

An embodiment of the present invention will now be more particularly described by way of example with reference to the accompanying drawings, in which: Figure 1 is a front elevation of a press embodying the invention; and Figure 2 is a perspective view of the press.

Referring now to the drawings, there is shown a press comprising a channel 1 in which a press piston 2 is movable to and fro by means of a crank drive 3, whereby harvest stock, which is picked up and conveyed through a feed opening 4 into the channel 1, is compacted through the movement of the piston and pressed into bales. In order to avoid blockage or wedging of the piston 2 due to buildup of harvest stock at the opening 4 or jamming of stock between the piston 2 and the walls of the channel 1, a vertical blade 5 is fastened to the front end face of the piston 2 at the side facing the feed opening 4. The blade 5 co-operates with a counterblade 6 arranged at the opening 4 and severs the strands of harvest stock pushed forward in front of the piston 2 during each compacting stroke. Guide rails 7 of U-section are mounted in the channel 1 for secure guidance of the piston 2.In order in that case to support the piston 2 so as to be statically defined in its bearing contact in each notional axis, a first one of the guide rails 7 is arranged on the side of the blade 5 at the bottom of the channel 1.

Arranged to run in the first rail are two rolelrs 9 with axes extending vertically to that rail 7 and one roller 8 which is mounted at the lower corner of the blade 5 of the piston 2 and has a horizontal axis to the rail. A second one of the rails 7, in which runs a further roller 8 with a horizontal axis relative to the second rail 7, is fastened to the side wall of the channel 1 at the blade side and at the height of the upper edge of the piston 2. A third one of the rails 7 is fastened to the channel 1 at the side of the piston 2 opposite to the blade 5 and guides two further rollers 8 with horizontal axes.

One of these two further rollers 8 is mounted in the region of the upper edge of the piston 2 and runs on the third rail 7 while the other one of these two rollers is guided in the third rail.

The length of the guide rails 7 is such that all of the rollers 8 and 9, which are arranged with the greatest practicable spacings from each other on the piston 2 while the piston itself is constructed to be as short as possible, in each stroke end setting of the piston still securely slide in and on the rails.

Claims

1. A baling press comprising means defining a guide channel, a press piston reciprocatingly displaceable along the channel and provided with a cutter in the region of one of the side walls of the channel and at an end of the piston leading in the direction of a working stroke thereof, a plurality of channel-section guide rails arranged in the guide channel and comprising a first rail extending along the base of the channel in the region of said one side wall, a second rail extending along said one side wall in the region of an upper side of the piston and a third rail extending along the other one of the side walls of the channel, and a plurality of guide rollers mounted on the piston and comprising a first roller rotatable about a horizontal axis and arranged in the region of said end of the piston to run in the first rail, a second and a third roller each rotatable about a vertical axis and arranged to run in the first rail, a fourth roller rotatable about a horizontal axis and arranged in the region of the other end of the piston to run in the second rail, and a fifth and a sixth roller rotatable about respective horizontal axes and arranged to run respectively in and on the third rail, the sixth roller being closer than the fifth roller to said other end of the piston.

2. A press substantially as hereinbefore described with reference to the accompanying drawings.