JPS628890Y2 - - Google Patents

Description

[Detailed description of the invention] (Purpose) The invention uses a phototube to detect slack in the metal strip on the slitter line, and automatically adjusts the speed of the take-up reel according to the detected slack. Regarding equipment.

(Prior art and problems) Conventionally, when cutting a metal strip such as a copper alloy in the longitudinal direction with a cutter and winding the resulting plurality of strip-shaped metal strips onto a single winding reel, these slits Since the thickness of the multiple slit metal strips varies in the width direction, the outer diameter of each slit metal strip may gradually change, elongate during winding, or the winding may be difficult. Due to changes in the tension of the handle, it is not always possible to wind it up evenly, and in some cases it may sag and form a loop.

Therefore, in order to accommodate this slack, a pit of appropriate depth is provided between the slitter and the take-up reel.

An operator nearby observes the slack (or tension) of the metal strip in this pit and adjusts the speed of the take-up reel.
In this method, observation and adjustment are required at all times during the operation of the slit, which is cumbersome. In addition, in an attempt to automate this process, a light beam device corresponding to each cut metal strip was installed to detect the loop state of each cut metal strip, or an upper and lower detection roll equipped with a current collecting mechanism was installed upward. and a voltage is applied between the material and the detection roll, and the detection output when the material and the detection roll come into contact determines the speed of the metal strip when the loop state of the cut metal strip becomes dangerous. I came up with the idea of trying to adjust it.

However, the former requires a large number of detectors and is complicated to adjust and maintain, making it impractical, while the latter mainly relies on mechanical operations, resulting in a complex mechanism and low accuracy. Since contact is absolutely essential, the mechanism has the disadvantage that the metal strip is inevitably damaged to varying degrees.

(Structure of the invention) The present invention has been made in view of this point, and includes a pit-type accumulator device for temporarily accumulating metal strips installed on a slitter line of the metal strips. Two phototube devices for detecting slack in the metal strips cut in the longitudinal direction are installed in the lower part so that the light beam crosses the cut metal strips horizontally or diagonally from the side. The present invention relates to a pit type accumulator device in which the speed of a take-up reel provided downstream of a line is adjusted in accordance with detection of slack in the cut metal strip.

When the phototube device is arranged so that the light beam crosses horizontally, it may be arranged at right angles to the length direction of the metal strip, or it may be arranged at an appropriate angle. Further, the phototube device may be provided so that the light beam passes from the vicinity of the lower even corner portion to the upper portion in the opposite direction, that is, in the diagonal direction.

In any case, in order to detect slack in the metal strip, it is important to install it in a direction that crosses the strip.
This makes it possible to achieve the intended purpose.

(Specific explanation of the idea) Next, this invention will be explained with reference to the drawings.

A metal strip 10 is sent out from the unwinding machine 1, and is slit into a plurality of metal strips in the longitudinal direction by a cutter of a slitter roll 2. A pinch roll 3 is provided on the exit side of the slitter, and a pit 4 of an appropriate depth is further provided downstream of the pinch roll 3. A pad 8 for guiding the metal strip 10 is installed on the exit side of the pit 4, and a winder 9 for simultaneously winding a plurality of strips is installed in front of the pad 8.

Since the metal strip 10 exiting the slitter 2 has variations in thickness in the width direction, the outer diameter of each slit metal strip when wound up may gradually change.
Because elongation occurs during winding or the degree of winding tension changes, winding is not necessarily uniform, and the winding speed becomes uneven for each metal strip 10. , the metal strip 10 becomes slack in the pit 4.

Although such slack in the pit 4 varies in each metal strip as shown in FIG. 1, during long winding, the length of the entire winding is approximately average.

In other words, if the speed of the take-up reel is adjusted so that the metal strip with the least slack among the multiple slit metal strips becomes almost horizontal, the winding of this metal strip will become tighter (tighter). Inevitably, the winding diameter becomes smaller, and as a result, the circumferential speed of winding decreases, leading to a slight slackening.
If the metal strip with the least amount of slack is then adjusted again to make it horizontal, the amount of winding will inevitably become uniform over the whole, and the slack will be adjusted within a certain range.

Therefore, the depth of the pit 4 may be temporarily set to a size sufficient to accommodate this non-uniformity in length.

As shown in FIG. 1, a phototube device 6 is installed near the pit 4 to detect the upper and lower limits of the slack (or tension) of the metal strip 10, and adjust the winding speed accordingly. automatically adjusts.

This automatic can also be switched manually.

The light emitter 6 and the receiver 7 of the phototube are selected at arbitrary positions in the pit 4 so that the light beam crosses the cut metal strips horizontally or diagonally from the side so that slack in the metal strips can be effectively detected. can.

(Effects) According to the present invention, the operator can constantly observe,
There is no need to make adjustments, and multiple strips can be automatically and properly wound onto the take-up reel. Further, since the photocell device requires only two phototube devices for detecting the upper and lower limits of the slack of the metal strip, the mechanism is extremely simple, and adjustment and maintenance are also extremely easy. Furthermore, since there is no mechanical contact for detection, it has an excellent effect of not causing scratches on the metal strip.

[Brief explanation of the drawing]

FIG. 1 is an explanatory side view of the pit-type accumulator device of the present invention. 1: Rewinding machine, 2: Slitter roll, 3: Pinch roll, 4: Pit, 5: Light beam, 6: Emitter, 7: Light receiver, 8: Pat, 9: Winder, 1
0: Metal strip.

Claims (1)

[Scope of utility model registration request] In a pit-type accumulator device for temporarily accumulating metal strips installed on a metal strip slitter line, in the upper and lower parts of the pit,
Two phototube devices for detecting slack in the metal strips cut in the longitudinal direction are installed so that the light beam crosses the cut metal strips horizontally or diagonally from the side, and the phototube devices detect slack in the cut metal strips. A pit-type accumulator device that adjusts the speed of a take-up reel provided downstream of a line in response to detection of slack in the metal strip.