Cutting – With means to guide moving work – With movable or yieldable guide element
Patent
1993-09-10
1996-07-30
Rada, Rinaldi I.
Cutting
With means to guide moving work
With movable or yieldable guide element
83450, 83823, 83828, 83829, 30374, B27G 1910
Patent
active
055401295
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to an anti-splintering device for sawing machines having a saw blade.
More particularly, it relates to an anti-splintering device which can be arranged laterally from the saw blade and is in pressure contact with the latter in the region of the teeth of the saw blade emerging from the workpiece.
In an apparatus for dividing metal-laminated webs into individual boards, as is described for example in EP 259,716, the anti-splintering device adopts an unchanged position relative to the saw blade. Thereby, especially in the event of a change in the cutting depth, no functional interaction between the anti-splintering device and the saw blade is guaranteed. As a result of this, the cut edge of the material is not clean and so has to be refinished.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide an anti-splintering device for sawing machines, which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in an anti-splintering device in which at least one positioning device connectable to a sawing machine supports the anti-splintering device for the correct operational arrangement in the event of a change in the cutting depth and/or in the angle of inclination of the saw blade.
When the anti-splintering device is designed in accordance with the present invention, it eliminates the disadvantages of the prior art.
It will be recognised that the invention is embodied whenever the anti-splintering device is a member which, in the operating state of the hand-operated circular saw, is actively connected simultaneously both to the workpiece and to the emerging teeth of the saw blade, so that the anti-splintering device exerts a force not only on the Workpiece but also on the saw blade and interacts with a positioning device which ensures that the anti-splintering device adopts the correct operating position. The exertion of force by the anti-splintering device prevents the formation of a gap between the teeth of the saw blade and the anti-splintering device. Since the anti-splintering device rests in close contact on the workpiece in the region of the cut, no gap, which could be regarded as the cause of a ragged cut edge, is formed in this region either. The cutting line also becomes considerably more precise as a result of the suppression or even elimination of vibrations of the saw blade.
If the proposed anti-splintering device is used in sawing machines with a sawing table, it is expedient if the part of the anti-splintering device resting on the workpiece lies in the contact plane defined by the workpiece and the sawing table or projects from the sawing table towards the workpiece. The alternative proposal is particularly suitable when the sawing machine is used to cut uneven workpieces.
Another expedient embodiment envisages that the anti-splintering device is adjustable relative to the saw blade, and can thus be set. This measure, according to the invention, can be used to particular advantage if the hand-operated circular saw is designed as an immersion saw, whose depth of immersion is altered as required. The radial adjustment of the anti-splintering device ensures that the anti-splintering device is always in pressure contact at least with the teeth of the saw blade.
A further expedient embodiment of the invention envisages that the anti-splintering device can be connected to the sawing machine in an articulated manner and pivoted about the spindle of the saw blade or about a spindle extending parallel to that spindle. This measure ensures that the anti-splintering device can be operatively connected to the teeth of the saw blade even when the depth of the immersion of the saw blade changes during the cutting operation. It is further envisaged that the anti-splintering device interacts with at least one spring element, by means of which the pressure of the anti-splintering devi
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Kalber Gerhard
Kalber Ralf
Rada Rinaldi I.
Robert & Bosch GmbH
Striker Michael J.
Woods Raymond D.
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