JP3045276U - Sewing machine for sheet ON. OFF unit - Google Patents

Abstract

(57) [Summary] [Object] To transmit the operating force of a solenoid to a sewing machine blade via a coil spring, to simplify blade pressure adjustment, and to absorb an impact operation by the coil spring to prevent damage to the blade and the drum. A cutter unit is separated into a cutter base and a holder, and the operating force of a solenoid is transmitted to the holder by a coil spring, and the processing target paper is processed by a sewing machine blade of the holder and a drum. . The operating range of the holder 6 is adjusted so as to be determined by the L position of the screw 31.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a sewing machine unit that performs a sewing process for partially cutting sheets such as slips and tickets.

[0002]

[Prior art]

 In a sheet sewing machine, there is a case where a sewing blade is pressed against a part of a sheet sent along a rotating drum to perform partial processing. Conventionally, this type of machine mounts a cutter base on a guide shaft installed in parallel with the rotation axis of the drum, and a solenoid provided on the cutter base. Pressing or returning to the sewing machine.

[0003] In general, sheets to be machined have various paper qualities, from thin to relatively thick, and must be correctly processed without any difference depending on the paper qualities. For that purpose, a sewing machine blade is attached to a drum according to the sheet. It was required to adjust the amount of blade pressure to be pressed to match the paper quality.

In such a case, conventionally, it is necessary to finely adjust the connecting portion between the plunger of the solenoid and the cutter holder, but the fine adjustment is difficult because it is necessary to process and confirm the sheet. In addition, when a large number of sewing operations are required, the adjustment must be performed for each cutter, and a large amount of time has been spent on the adjustment.

[0005]

[Problems to be solved by the invention]

 The purpose of the present invention is not only to simplify blade pressure adjustment for paper quality, but also to prevent damage to the sewing machine blade and drum due to adjustment error and impact drive.

[0006]

[Means for Solving the Problems]

 According to the present invention, a holder having a rotatable sewing blade attached to a cutter base is attached by a fulcrum, and the holder is moved closer to and away from the drum by a solenoid plunger and a coil spring, so that adjustment is simplified and damaged. Prevention was realized.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a guide shaft along which the cutter base 2 is slidable. The guide shaft 1 is provided with a scale 3 from which the position of the cutter base 2 is set. The cutter base 2 is fixed to the guide shaft 1 by screws 4 at the set position.

A holder 6 for rotatably supporting the sewing machine blade 5 is attached to the cutter base 2 by a fulcrum shaft 7. Specifically, the holder 6 is inserted into the U-shaped groove 8 of the cutter base 2, and the fulcrum shaft 7 is inserted through the fulcrum shaft hole 9 of the cutter base, and is attached by the fixing screw 10. Thereby, the sewing machine blade 5 of the holder 6 approaches and separates from the drum.

The holder 11 is attached to the cutter base 2 with screws 12 (not shown). The solenoid 13 is attached to the holder 11 by screws 14.

The cutter base 2 has a solenoid plunger insertion hole 15. A coil spring 19 is attached to the plunger 16 by a pin 18 in a hole 17 passing through the plunger 16. The holder 6 has an insertion hole 20. A screw 23 inserted into the insertion hole 20 has a hole 23 at the tip end 22, and the other end of the coil spring 19 is attached to the holder 21. N is a double nut for fixing the adjustment length of the screw 21. By adjusting the double nut N, the blade pressure on the sheet when the solenoid is operated can be adjusted.

Two spacers 24 are provided so as to sandwich the plunger 16 from both sides of the cutter base 2, and can be slidably inserted into a slide groove 25 parallel to the plunger insertion hole 15 of the cutter base 2. The hole 26 in the spacer is mounted in the hole 17 in the plunger 16 together with the coil spring 19 by means of a pin 18. The hole 27 at the other end of the spacer 24 is freely attached to the holder 6 by a pin 28. The hole 27 is made larger in the direction in which the sewing machine blade 5 moves away from the drum, and serves as a relief for the sewing machine blade.

The spacer 24 is a spacer that prevents the positional relationship between the plunger 16 and the holder 6 from being disturbed by the coil spring 19 due to the amount of blade pressure adjustment by the screw 21. The distance between the plunger and the holder is constant, and only the blade pressure can be increased or decreased. The spacer 24 may be replaced with a screw shaft that extends from the tip of the suction portion (left side in the figure) of the plunger to the outside through the solenoid so that the distance between the plunger and the holder can be adjusted with a double nut. Needless to say, the effect is the same even if the hole 27 at the other end of the spacer 24 is not cut off.

The holder 6 has a U-shaped groove 29 at the upper end. The screw hole 30 of the cutter base 2 is provided with a screw 31 for limiting a range in which the sewing machine blade approaches and separates from the drum. More specifically, the forming portions of the H portion (upper limit of being separated from the drum of the sewing machine blade) and the L portion (lower limit of approaching to the drum of the sewing machine blade) of the screw 31 engage with the U-shaped groove 29 of the holder 6. N is a nut for fixing the screw 31.

A counterbore hole 33 of the holder 6 is provided at a position opposite to the counterbore hole 32 of the cutter base 2, and a pressing spring 34 is inserted between the counterbore holes 32 and 33. Is set to be separated from the drum. When the solenoid 13 is ON, the sewing machine blade of the holder 6 can approach or come into contact with the drum by the coil spring 19 which overcomes the pressing force set by the pressing spring 34. The compression spring 34 can be changed to an equivalent tension spring. In this case, it goes without saying that the tension spring is arranged closer to the sewing machine blade than the fulcrum 7.

A drum 35 is installed in parallel with the guide shaft 1, and a sheet P to be machined is sent along the drum 35. The drum 35 is rotated in synchronization with the feed speed of the sheet P at a peripheral speed.

As described above, the screw 31 for limiting the range in which the sewing machine blade approaches and separates from the drum is adjusted in a state where the solenoid is turned on (energized state), so that the sewing machine blade approaches or comes into contact with the drum. To Next, the nut N for fixing the adjustment length of the screw 21 is turned to adjust the blade pressure against the sheet P, and the nut N is fixed. In general, the pressure should be set low for thin sheets and high for thick sheets.

[0017]

[Effect of the invention]

 As described above, according to the present invention, the adjustment of the pressing force of the sewing machine blade can absorb a relatively coarse adjustment by the coil spring 19 as long as the screw 31 for restricting the position where the sewing machine blade approaches the drum is adjusted and fixed. The machine can be correctly machined on a wide range of paper qualities, greatly reducing the adjustment time. The solenoid is turned ON for partial sewing. The operation of the sewing machine holder, which is shocked by turning off the sewing machine, can be mitigated by the coil spring 19, and the screw 31 can be used to prevent damage caused by the collision between the drum and the sewing machine blade.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front view of FIG. 1;

[Explanation of symbols]

 2 Cutter base 5 Sewing blade 6 Holder 7 Support shaft 13 Solenoid 16 Plunger 19 Coil spring 21 Screw (for controlling blade pressure) 31 Screw (for restricting blade movement) 34 Press spring 35 Drum P Processing target paper

Claims (1)

[Utility model registration claims] 1. A cutter base is slidably provided on a guide shaft parallel to a drum to which a sheet to be machined is fed along. An OFF solenoid is provided, a holder of the sewing machine blade that freely rotates with respect to the drum is provided on the cutter base so as to be able to press freely, and the operating force of the solenoid is driven via a coil spring to the holder of the sewing machine blade,
The sewing machine for the sheet is turned ON. OFF unit.