DE2815300A1 - Double action operating element for limit switches - has hinge pin of scrap press filling door with two cams on which pin of limit switch rests - Google Patents

Abstract

The device is used for locking doors of filling and pressing shafts of standing scrap presses. Filling and pressng shaft sections (b, c) are covered by a common door (2) on vertical hinges (1). An additional filling door (5) with horizontal hinges (4) is provided on the main door (2), covering the section (b). The axis of the hinges (4) passes through the door (2) frame (2a), and the pin stub has two staggered switching cams with a common start. When the press operates, the pin of a limit switch rests on it.

Description

Double-acting actuator for limit switches

on removable covers of powered machine parts. The invention refers to a double acting actuator for limit switches on removable Covers for powered machine parts, in particular for locking doors of upright waste presses from filling and PreE shafts.

In particular with the aforementioned press groups that are used in today's Time for disposal by packaging office waste, cardboard boxes, etc. used up Packaging materials are being used to an ever greater extent the trade association etc. Associations, extremely strict regulations regarding the operational safety with regard to the operating personnel. So is for example Mandatory for the press manufacturer, the mostly separate doors the filling, as well as the entire press shaft via limit switch or the like. like that ensure that the entire drive system is immediately de-energized if one of these Doors is unlocked or opened.

All of the most varied of systems known to date on the market Bauart fulfill this requirement in a logical way through limit switch-like individual protection each of these doors, as well as corresponding electrical connection in terms of circuitry these separate securing points with the machine control.

The disadvantages resulting from this are particularly technical diverse and therefore expensive elements and installation work for these double safeguards.

The present invention has therefore set itself the task of door assembly and door protection in such a way that one common, thus double-acting actuation element, together with only a single end switch the required system protection can be achieved.

This problem is essentially solved by the fact that the one on top of the other lying areas of the filling and pressing shaft on the one hand, through a common, to vertical bearing hinged door are covered and on the other hand within this Door surface and in the area of the filling chute a swiveling out about a horizontal axis, additional filling flap is arranged, with its axis at one end through the frame the shaft door runs through it and the stub axle is two offset from one another Has switching curves with a common curve intersection or switching curve start and the latter rests on the switching pin of a limit switch in the operating position of the press.

Since also provided in a special embodiment of this invention is that the two switching curves in mutually perpendicular planes sit on a common switch head on the stub axle, as well as switch head and associated Limit switches on the hinge side of the door are surprisingly easier Way with only a single limit switch for both door elements, in each case the Requirement for immediate machine shutdown met if a.

these doors are unlocked or opened Further Details as well as the special mode of action of the Musführung example according to the invention are shown in the drawing and described in more detail below.

The figures show: FIG. 1 a schematic perspective illustration of a standing one Waste press, Fig. 2 the detail at "A", that is, limit switch and actuator in view, FIG. 3 shows a plan view of FIG. 2 and FIG. 4 shows a partial side view to FIG. 2 According to the perspective system illustration in FIG. 1, the one shown has Press the areas of the drive elements lying one above the other in a manner known per se a, the filling chute b and the actual press room c.

Filling and pressing shaft b and c are through a vertical bearing 1 joint, horizontally pivotable door element 2 with locking mechanism 3 covered, in addition in the door frame 2a for the area of the filling shaft b a horizontally pivotable flap 5 separately about the axis 4 with its own locking mechanism 6 is arranged.

On the side of the Uertikallager 1, the axis 4 is through the frame 2a passed through the shaft door 2, with a on the free stub axle 4a Switching head 9 provided between switching cams 7 and 8 is seated. Both switching curves lie offset by 9fl0 to each other and intersect or begin in a common Point 10 in which also in the operating position of the press, i.e. with the doors closed 2 and 5, the switch pin 11 of a limit switch element 12 not pressed, that is, in position "On" is present.

The effect of this double, i.e. together on or for the two door elements 2, 2a and 5, effective safety device or limit switch is now the following: a. Is by releasing the lock 6, the flap 5 with essentially swiveled down with the vertical movement component, i.e. opened, the Cam track 7 according to the course of the arrow 8 in Fig. 4 by rotating the axis 4 and the the switching head 9 fixed on it by approx.

90 °, so approximately to 8 'further, whereby the switching pin 11 of the limit switch element 12 is pressed in by the dimension x, i.e. the machine drive is de-energized.

b. If, however, the door 2 after unlocking at 3 over the camp 1 opened and swiveled out, caused by the door frame 2a with the stub axle 4a protruding switch head Sliding past the switching curve 8 - according to Arrow direction G in Fig. 3 - to about the plane, or the imaginary point C 'in the point 10 is and thereby the switching pin 11 of the limit switch 12 also by the dimension x pressed in and made the machine control de-energized.

This arrangement according to the invention thus provides absolute security given for the operating personnel.

Claims (3)

Claims 1. Double-acting actuator for limit switches on removable covers of powered machine parts, in particular for the locking doors from the filling and pressing shaft standing waste presses, characterized in that the superimposed areas (b and c) of the filling and pressing shaft on the one hand are covered by a common door (2) which can be pivoted around Ilertikallager (1) and on the other hand within this door surface and in the area of the filling shaft ( b) an additional filling flap which can be swiveled out about a horizontal axis (4) (5) is arranged, with its axis (4) at one end through the frame (2a) of the Shaft door (2) runs through and the stub axle (4a) two offset to one another horizontal switching curves (7 and 8) with common curve intersection t 10) or Has the start of the switching curve and the latter in the operating position of the press on the switching pin (11) of a limit switch (12) is applied. 2. Actuator according to claim 1, characterized in that the two switching curves (7 and 8) in two mutually perpendicular planes or offset by 90 ° to each other on a common switch head (9) on the stub axle (4a) sit. 3. Actuator according to Claims 1 and 2, characterized in that that switching head (9) and assigned limit switch (12) on the hinge side (1) of the door (2, 2a).