Winding – tensioning – or guiding – Coil holder or support – Spool or core
Patent
1989-03-09
1990-04-03
Watkins, Donald
Winding, tensioning, or guiding
Coil holder or support
Spool or core
242 684, 242 786, 242 781, B65H 6700, B65H 1912, B21C 4716
Patent
active
049133675
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a coil width detecting apparatus usable for a coil material feeding unit adapted to continuously feed the strip uncoiled from a coil material loaded on uncoilers wherein a width of the coil material is checked by measurement.
BACKGROUND ART
A coil material feeding unit adapted to feed to a press line the strip uncoiled from a coil material is provided with uncoilers for continuously uncoil the coil material which has been transferred to the uncoilers. The strip uncoiled from the coil material by the uncoilers is caused through a leveller to straighten the curved contour of the strip as seen immediately after the uncoiling therefrom and thereafter it is fed to the press line where it receives forming operation.
A coil material to be loaded on the uncoilers has a width different from production lot to production lot and this fact requires an operator to input into a control section of the coil material feeding unit the width of a coil material to be loaded on the uncoilers before the coil material is loaded on the uncoilers. The control section is adapted to perform control operations in correspondence to a width of the coil material on the basis of data which have been inputted thereinto.
In fact, a conventional coil material feeding unit does not measure the width of a coil material conveyed to uncoilers and moreover it does not check whether or not it coincides with the coil width data which have been inputted into the control section. This leads to such a malfunction that the inputted coil width data do not often coincide with the actual width of a coil material which has been transferred to the uncoilers, resulting in correct control operations failing to be performed.
The present invention has been made with the foregoing background in mind and its object resides in providing a coil width detecting apparatus usable for a coil material feeding unit which assures that the width of a coil material can be measured exactly and an occurrence of incorrect setting of a coil material can be prevented reliably.
DISCLOSURE OF THE INVENTION
To accomplish the above object, the present invention provides a coil width detecting apparatus usable for a coil material feeding unit wherein the apparatus comprises a coil material having a hole formed at the central part thereof, an uncoiler mechanism including a pair of cylinder mechanisms adapted to move in the axial direction of the coil material so as to allow the coil material to be clamped from both sides by inserting into the hole of the coil material a pair of support shafts secured to the foremost ends of piston rods in the cylinder mechanisms, a pair of racks secured to the support shafts to move in the same direction as that of movement of the support shafts in compliance with the movement of the latter, a pinion interposed between the pair of racks to mesh with the latter, rotational displacement detecting means for detecting the rotational displacement of the pinion during a period of movement of the support shafts from a predetermined position where they are displaced to the rearmost ends to a predetermined position where the coil material is held in a clamped state, setting means for previously setting a distance between both the support shafts when the latter are located at the position where they are displaced to the rearmost ends, and subtracting means for subtracting the value detected by the rotational displacement detecting means from the value set by the setting means to output a result derived from the subtraction as an actual coil width.
With such construction, a value detected by the rotational displacement detecting means represents a value corresponding to a sum of distances of actual displacement of the respective support shafts when the latter have been displaced from the rearmost ends to the clamp positions. Thus, an actual coil width can be obtained by subtracting the value detected by the rotational displacement detecting means from the distance between both the support shafts which can
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Kabushiki Kaisha Komatsu Seisakusho
Watkins Donald
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