GB2299540A

GB2299540A - Support for the bearing block of a working aid to wood moulding machines

Info

Publication number: GB2299540A
Application number: GB9607282A
Authority: GB
Inventors: Georg Aigner
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-04-07
Filing date: 1996-04-09
Publication date: 1996-10-09
Anticipated expiration: 2016-04-09
Also published as: GB2299540A8; DE19512693C1; GB9607282D0; FR2732640B1; FR2732640A1; GB2299540B; CH690495A5

Description

1 2299540 Supporting member for securing the bearing block of a working

aid to wood moulding machines DescriDtion The invention relates to a supporting member for securing the bearing block of a working aid, in particular a safety and pressure device, to wood moulding machines.

Moulding machines for working wood and also other machine tools may be equipped with various working aids which serve to facilitate or to simplify the working processes, to improve the safety of the operating personnel or to guide the workpiece precisely. An example of this is DE-C 43 05 356, which relates to a safety and pressure device, with the help of which the workpiece is pressed in the horizontal direction against a stop and from above against the machine table. In this case, the bearing block of this safety and pressure device is secured by way of a spacer block on the upper side of a protective hood through which the wood shavings resulting from working the wood are sucked away.

This manner of securing the bearing block is unproblematic when the housing of the protective hood provides the necessary supporting surface and is also rigid enough to be able to take up the forces exerted by the working aid. Often however, such a housing is not available because it is made for example of sheet metal or plastics material and thus does not have the necessary rigidity, or because it does not provide enough space for mounting the bearing block.

The AIGNER catalogue of the Applicant (1990, pages 36 to 41) discloses a supporting bridge corresponding to the Doeumeni = 29869 precharacterizing clause of Claim 1, with the aid of

2 discloses a supporting bridge corresponding to the precharacterizing clause of claim 1, with the aid of which pressure shoes are secured in front of a protective hood of a moulding machine. For this purpose, the two vertical legs are secured to the guide plates of a stop, whilst the cross-rail is a separate component in the form of a strip which is either pivotally mounted on the upper end of one leg and may be pivoted into a cutout in the other leg, or which may be inserted in two cutouts in both legs and clamped therein. With this construction it is possible to mount working aids above the protective hood of a moulding machine, the bridging length being adjustable. However, the forces which can be taken up by the cross-rail, which is a separate component adjacent to the two legs, are limited.

The object of the invention is to provide a supporting member for securing the bearing block of working aids, this supporting member, when it is variably adapted to the respective spatial conditions, being sufficiently rigid to be able to take up the forces which arise, and which is made up of a minimum of components.

According to the invention, this object is achieved in that the crossrail for receiving the bearing block is made up of two limbs lying one on top of the other, which each project horizontally from the upper end of one leg whereof the lower end is constructed as a horizontal foot which is bent outwards towards the opposite side.

Thus, a supporting member comprising only two halves bent off in a Z shape is available, this being substantially more rigid than the known supporting bridge. The two Z-shaped halves may be manufactured and assembled very simply, for this purpose the outwardly bent feet being screwed directly onto the machine table whilst the limbs which are lying one on top of the other and which project from the upper ends of the two legs lend the supporting bridge a very high degree of rigidity in the screwed- 3 together state. Depending on the spatial conditions, the supporting bridge is intended to be securely mounted above or behind a protective hood of commercial moulding machines in order to receive the bearing block.

The supporting bridge can be made for example of grey cast iron or aluminium diecasting in order to offer sufficient rigidity to resist all forces which occur. Since the bridging length of the cross-rail can be altered, all the existing fittings can be bridged, for example suction devices, protective hoods or suction tubes. The working aid secured to the cross-rail generally comprises a safety and pressure device, but can also be a measuring device, a feed member or a workpiece guide.

Incorporated in each limb of the cross-rail are bores for pushing through connecting screws, by means of which the bearing block is secured on the upper limb such that it is mounted centrally in relation to the inside width of the supporting bridge.

The bores in each limb should form a congruent pattern of holes which, when the limbs are mutually displaced to adjust the bridging length, leaves free the necessary holes corresponding to the pattern of holes in the bearing block. If a pattern of holes in the limbs corresponding to the pattern of holes in the bearing block is present a plurality of times, for example three times, then a short, a medium and a large bridging length of the cross-rail may be set.

Further features and advantages of the invention emerge from the claims and the following description of an example embodiment which is shown in the drawing, in which:

Figure 1 shows a view of a wood moulding machine with built-on suction unit and a supporting member according to the invention for securing the bearing block of a safety and pressure device, Figure 2 shows the saf ety and pressure device indicated in Figure 4 1, whereof the bearing block is secured in conventional manner to the housing of the suction unit, Figure 3 shows an illustration corresponding to Figure 2 with the bearing block secured by means of a spacer block to the upper side of the housing of the suction unit, Figure 4 shows a view from below of the bearing block of Figures 1 to 3 to illustrate the possible pattern of holes, Figure 5 shows a view from above of the free limbs of the supporting bridge according to the invention to illustrate the pattern of holes used, Figure 6 shows the view of the supporting bridge in a f irst securing position with a small spacing between the legs, and Figure 7 shows an illustration of the supporting bridge corresponding to Figure 6, with a large spacing between the legs.

Figure 2 indicates a housing 12 secured to a machine table 10 of a wood moulding machine, the rear, tapering end 14 of the housing 12 being connected by way of a tube 16 to a suction device. on the front side of the housing 12 there is mounted a stop 18 for guiding a workpiece to be moulded. Secured to the upper side 20 of the housing 12 by means of a spacer block 22 is the bearing block 24 of a working aid 26 which comprises a safety and pressure device and which is described in detail in DE-C 43 05 356. This has an arm 30 which is mounted pivotally about a horizontal axis 28 in the bearing block 24, the front end of the arm 30 supporting a pressure shoe 32, which presses the workpiece vertically against the machine table 10, and a guide member 34 which presses the workpiece in the horizontal direction against the stop 18.

Figure 3 indicates how the bearing block 24 is secured to the upper side 20 of the housing 12. In order to achieve the desired height, the spacer block 22 is inserted between the upper side 20 of the housing 12 and the bearing block 24, after which connecting screws 36 are pushed from the inside of the housing 12, these connecting screws 36 running through corresponding holes in the spacer block 22 and being screwed into tapped bores 38 in the bearing block 24.

Figure 4 illustrates the view from below of the bearing block 24, which has four tapped bores 38 in total, of which two tapped bores 38 lie on the longitudinal centre line 40 of the bearing block 24, while the other two tapped bores 381 are arranged to be centrosymmetric to the centre (point of intersection of the longitudinal centre line 40 with the transverse centre line 40f). Since the two tapped bores 381 lie outside the longitudinal centre line 40, the connecting screws 36 screwed therein can take up the tilting moments exerted by the working aid 26.

Figure 1 illustrates that the rear end 14 of the housing 12 does not serve to receive the bearing block 24 of the working aid 26 but that a supporting bridge 42 is provided for this purpose according to the invention. Substantially, this comprises two halves bent off in a Z shape, which are made of a load-bearing material, for example grey cast iron or aluminium diecasting. Each half has a vertical leg 44 whereof the lower end 46 is constructed as an outwardly bent foot which is supported by way of its f lat underside on the machine table 10 and which is secured thereto by way of two screws 48. A horizontal limb 50 projects from the upper end of each leg 44. Figures 6 and 7 show that the two legs 44 have different lengths, which are selected such that, in the assembled condition of the supporting bridge 42, the limb 50 of the leg 44 on the right in the figures is supported in planar manner on the limb 50 of the other leg 44.

The bearing block 24 is supported on the top limb 50 without the interposition of the spacer block 22, the connecting screws 36 being pushed through corresponding bores 52 in the limbs 50 and the latter being screwed tightly together with the bearing block 6 24. The bores 52 in the two limbs 50 are mounted such that the two legs 44 may be fixed to have a different spacing from each other in order to be able to set different bridging lengths of the cross-rail comprising the two limbs 50 (Figures 6 and 7). In this manner, it is possible to adapt the bridging length of the supporting bridge 42 to the conditions of the respective moulding machine. Figures 6 and 7 furthermore show that, with each adjustment position of the supporting bridge 42, the bearing block 24 is fixed centrally on the supporting bridge 42 in relation to the inside width.

Figure 5 shows that the bores 52 in both limbs 50 form congruent, i.e. coincident, patterns. In the case of the example embodiment, three pairs of bores 52 in total lie on the longitudinal centre line 40 of each limb 50, the spacing a being the same within each pair. This spacing a corresponds to the spacing a of the tapped bores 38 in the bearing block 24 in accordance with Figure 4. Three further bores 521 are made on both sides of the longitudinal centre line 40 in each case, whereof the arrangement corresponds to the tapped bores 381 in the bearing block 24. In this manner, the two limbs 50 may be laid one above the other in three different positions, so that the pattern of holes of the tapped bores 38, 381 in the bearing block 24 may be adjusted a total of three ways on the cross-rail of the supporting bridge 42 in order that the inside width of the supporting bridge 42 may thus be adjusted to be small, medium and large.

Claims

Claims

7 1. A supporting member for securing the bearing block of a working aid, in particular a safety and pressure device, to wood moulding machines, comprising a supporting bridge having two substantially vertical legs whereof the lower ends are supportable on the machine table and whereof the upper ends are connectable to one another by way of a cross-rail, the bridging length of the cross-rail being adjustable to set the inside width between the legs, characterized in that the cross-rail is for receiving the bearing block and is made up of two limbs lying one on top of the other, each projecting horizontally from the upper end of a respective leg, whereof the lower end is constructed as a horizontal foot which is bent outwards towards the opposite side.
2. A supporting member according to Claim 1, characterized in that incorporated in each limb are bores through which connecting screws may be pushed, by means of which the bearing block may be fixed to the upper limb centrally in relation to the inside width of the supporting bridge.
3. A supporting member according to Claim 2, characterized in that the bores in each limb f orm a congruent pattern of holes.
4. A supporting member according to Claims 2 and 3, characterized in that, for securing a bearing block having at least two tapped bores for the connecting screws, each limb has at least four bores arranged in pairs, the spacing within each pair being the same.
5. A supporting member according to Claim 4, characterized in that, for securing a bearing block having four tapped bores, two bores lie on the longitudinal centre line of the limbs and the other two lie on either side of the longitudinal 8 centre line, and in that this pattern of holes is present at least twice in each limb.
6. A supporting member for securing the bearing block of a working aid to wood moulding machines, substantially as herein described with reference to Figures 1 and 4 to
7.