JP2000246537A - Flying shear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the adjustment of backlash, improve working efficiency, and secure the sharpness of a cutter by forming gear for rotating a cutter into an overlap gear, pivotally moving a partial gear in the radial direction with a pin set to a fulcrum by a spring, and attaching an adjustment screw adjusting the position of the cutter in the radial direction. SOLUTION: An upper and a lower cutter 22, 23 of a cutting device are installed in respective grooves 20A, 21A of respective gears 20, 21 and fixed to a presser plate by respective bolts 31, 48. A partial overlap gear 37 which is arranged in a side of the lower gear 21 is pivotally moved in the radial direction with a pin 38 set to a fulcrum by a spring. This constitution can engage the upper gear 20 with the partial gear 37 at all times in a zero backlash state so that the upper and the lower cutters 22, 23 can hold an optimal clearance relation for a long time. The height of the upper cutter 23 is difficult to be adjust in the radial direction and the looseness of the bolt 31 easily causes distortion in the height dimension, however, the attachment of the adjustment screws 51, 53 to the upper and the lower cutters 22, 23 can solve these problems.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlash removing device for a driving gear of a flying shear (hereinafter referred to as a "shear") for cutting a material to be cut during running, and a method of adjusting a blade.

[0002]

2. Description of the Related Art Clearance between upper and lower blades of a shear is strictly controlled because it is related to sharpness, cutting force, dimensional accuracy, noise and the like. The shear clearance is generally dependent on the backlash of the drive gear. For this reason, various types of backlash removing devices have conventionally been employed. Among them, generally, two gears are superimposed and relatively rotated in the circumferential direction so that both gears are bolted at an optimum backlash position. There is a method of fixing with. However, this method has a drawback that the tooth surface is worn and the backlash becomes large when used for a long period of time. Further, although the blade is fixed by bolts from the lateral direction, it is difficult to finely adjust the blade in the radial direction, and there is a disadvantage that the dimensions are loosened during operation and the related dimensions are deviated.

[0003]

The present invention eliminates such inconveniences and eliminates the need for skill and time-consuming backlash adjustment work, thereby improving work efficiency and maintaining the sharpness of the blade for a long period of time, and maintaining product accuracy. The object of the present invention is to prevent noise caused by backlash, to facilitate adjustment of the blade, and to prevent displacement.

[0004]

In order to achieve this object, the present invention provides a rotating gear for a blade as a superimposed gear, one of which is a partial gear, which is radially supported by a spring with a pin as a fulcrum. And automatically backlash to zero. Also, in order to facilitate the radial adjustment of the blade,
The blade is provided with a screw hole, and the blade can be moved in the radial direction with an adjustment screw so that fine adjustment can be performed.

[0005]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory overall side view showing a schematic configuration of an embodiment of the present invention, and FIG. 2 is a plan view of FIG. As shown in FIG. 1, the flying shear 25 of the present invention includes an entry roller 3, a leveler 4, a supply device 6, a cutting device 19,
It is composed of a drive device 24 and a gantry 52.

The steel wire 2 sent from the right side is straightened while passing between the rolls 5 of the leveler 4 via the entry rollers 3. The description of the leveler 4 is omitted because it is a known technique. The steel wire 2 that has exited the leveler 4 is urged by the rolls 7 and 8 of the supply device 6 to be sent to the next cutting device 19.

The upper and lower blades 22, 23 attached to the driving gears 20, 21 of the cutting device 19 rotate in the same manner as the driving gears 20, 21, and the steel wire 2 is wound at the position where the upper and lower blades 22, 23 are closest. Disconnect.

[0008] The rotational force of the supply device 6 and the cutting device 19 is provided by a drive device 24. The rotational force of the chain wheel 9 fitted to the output shaft of the motor 10 of the drive device 24 is transmitted to the chain wheel 12 by the chain 11. Another chain wheel 13, 16 is fitted to the drive shaft 26 to which the chain wheel 12 is fitted, and the chain wheel 15, which is fitted to the input shaft 27 of the supply device 6 via the chains 14, 17, respectively, is cut. Input shaft 28 of device 19
The rotational force is transmitted to the chain wheel 18 fitted on the wheel. Since the supply device 6 and the speed reducers 45 and 46 for the cutting device 19 are known, their description will be omitted.

As can be seen from FIG. 2, the entrance roller 3, the levelers 4, 29, the supply device 6, and the cutting device 19 installed on the gantry 52 are arranged so that the two steel wires 2, 30 can be processed simultaneously. Have been. As shown in FIGS. 3 and 4, the upper and lower blades 22 and 23 of the cutting device 19 are fitted into grooves 20 </ b> A and 21 </ b> A of the gears 20 and 21, and a washer 33 and a washer 4.
The fixing plate 32 and a pressing plate 50 (not shown) are fixed to the pressing plate 32 and bolts 31 and 48 through the fixing member 9. The gear 21 and the holding plate 32 in FIG. 4 are fixed to the output shaft 40 of the cutting device 19 with a key 41, and a washer 43, a washer 44 and a thrust direction.
And is fixed to the output shaft 40 by bolts 42.
Although not shown, the gear 20 and the holding plate 50 are fixed in the same manner.

The upper and lower blades 22, 23 have cemented carbide tips 22A, 23A having high hardness and abrasion resistance attached to the blades in order to maintain sharpness for a long period of time. Upper and lower blades 22,2
The sharpness of No. 3 greatly depends on the gap, that is, the related dimension in the circumferential direction. If the gap is too large, the cutting force increases, and the cut edge becomes dirty. Since the gap between the shear blades 22 and 23 is determined by the backlash of the drive gears 20 and 21, it is important to control the backlash to a small value. In the present invention, an automatic backlash removing device as shown in FIG. 5 has been developed in order to automatically control the backlash for a long period of time. In general, as a gear backlash removing device, as shown in FIG. 6, two gears 34, 35 having the same tooth shape are superimposed, and these are shifted in the circumferential direction to each other, so that bolts 36, 47 are located at the optimum backlash position. The method of fixing with is taken. However, this method has a drawback that if the gear is used for a long period of time, the tooth surface is worn and the backlash increases.

In the present invention, FIG.
As shown in FIG.
The partial gear 37 is pivoted in the radial direction by a spring 39 with a pin 38 as a fulcrum. As a result, the upper gear 20 and the partial gear 37 always mesh with zero backlash, so that the upper and lower blades 22, 23 can maintain the optimum gap relationship for a long time.

As shown in FIG. 4, the blade 23 is fixed to the holding plate 32 by bolts 31. However, it is difficult to adjust the height in the radial direction, and a slight loosening of the bolt 31 causes a deviation in the height. There were problems, but in the present invention, these problems were solved by attaching the adjusting screws 51, 53 to the blades 22, 23.

[0013]

According to the present invention, an appropriate backlash can be maintained automatically and for a long time as compared with the conventional backlash removing device, so that the sharpness of the blade can be maintained for a long time without adjustment. Also, noise due to backlash can be prevented. Further, the height adjustment of the blade in the radial direction can be easily adjusted by the adjusting screw attached to the blade, and it can be said that this is a very useful invention that can prevent the height dimension from being deviated due to slight loosening of the blade tightening bolt.

[Brief description of the drawings]

FIG. 1 is an overall side view showing a schematic configuration of an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a detailed view of a blade related to an apparatus according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a gear and a blade relating to an embodiment of the present invention.

FIG. 5 is a front view showing a schematic configuration of a backlash removing device of an embodiment of the present invention.

FIG. 6 is a front view showing a schematic configuration of a conventional gear backlash removing device.

[Explanation of symbols]

 2 Steel Wire 3 Entering Roller 4 Leveler 5 Roll 6 Supplying Device 7 Upper Roll 8 Lower Roll 9 Chain Wheel 10 Motor 11 Chain 12 Chain Wheel 13 Chain Wheel 14 Chain 15 Chain Wheel 16 Chain Wheel 17 Chain 18 Chain Wheel 19 Cutting Device 20 Gear 20A Groove 21 Gear 21A Groove 22 Upper cutter 22A Carbide tip 23 Lower cutter 23A Carbide tip 24 Drive device 25 Flying shear 26 Drive shaft 27 Input shaft 28 Input shaft 29 Leveler 30 Steel wire 31 Bolt 32 Presser plate 33 Washer 34 Gear 35 Gear 36 Bolt 37 Partial gear 38 Pin 39 Spring 40 Output shaft 41 Key 42 Bolt 43 Washer 44 Washer 45 Reducer for feeder 46 Reducer for cutting device 47 Bolt 48 Bolt 49 Washer 50 Holding plate 51 Adjusting screw 52 Mounting stand 53 Adjustment screw

Claims (1)

[Claims] In a flying shear for cutting a material to be cut during running, a blade rotating gear is a superimposed gear, one of which is a partial gear, and the partial gear is spring-loaded radially around a pin as a fulcrum. A flying shear, characterized in that the blade is provided with an adjusting screw capable of adjusting a position in a radial direction by pivoting the blade.