JP2587588Y2 - Eyelet cutting device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an eyelet cutting device for a sewing machine which cuts an eyelet as a button hole in a cloth to be sewn to form a hole.

[0002]

2. Description of the Related Art In the field of sewing, there have conventionally been various eyelet-hole-hole sewing machines that cut a hole-hole as a button hole in a cloth, and then perform a hole-up operation. Recently, there is a programmed eyelet buttonhole sewing machine, and an example of the programmed eyelet buttonhole sewing machine is shown in FIG. In FIG. 4, 100 is a sewing machine, 101 is a scalpel, 102 is a cloth presser, and 103 is an XY table.

That is, the cloth 104 is pressed by the cloth presser 102,
As shown in FIG. 5A, a scalpel 101 provided on the sewing machine 100 is
XY table 1
As the sewing machine 100 is operated, the sewing machine 100 boils the hole 107 while moving the sewing machine 03 in the front-rear and left-right directions to obtain the seam 107 after the hole sewing as shown in FIG.

As shown in FIG. 6, the scalpel 101 has a blade portion 111 in which a substantially circular portion 112 for drilling and a straight portion 113 for straight cutting are continuous.
5 and the straight cut 106 were formed at a time.

[0005]

However, as shown in FIG. 5 (b), the buttonhole stitch 107 to be sewn has a length corresponding to the linear cut 106 due to a difference in the size of the button. A changes. And seam 10
Regarding 7, the drive data of the XY table 103 can be changed by a program.
Since the length of 1 is fixed, the scalpel 101 has to be replaced each time the eyelet hole size is changed, and the operation is troublesome.

Accordingly, an object of the present invention is to provide an eyelet notch that can be cut into a required length in accordance with a change in the size of the eyelet hole as a button hole without requiring replacement of a scalpel, thereby improving workability. It is to provide a device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention is an apparatus for cutting an eyelet having continuous holes and straight cuts in a cloth on a movable table. A scalpel having a substantially circular blade to be machined, a scalpel driving means for operating the scalpel, a scalpel having a straight blade for machining the straight scalpel, and the scalpel And a cutting knife driving means that operates independently of the drilling knife.

[0008]

[Action] A drilling knife having a substantially circular blade is operated by a drilling knife driving means on a cloth on a movable table to form an eyelet-shaped hole, and independently of the drilling. A cutting knife having a straight blade portion is operated by a cutting knife driving means to process a straight cutting portion continuous with the hole.

Therefore, by moving the table in synchronization with the operation of the cutting knife, it is possible to obtain a cut of a required length according to a change in the size of the eyelet as a buttonhole. Therefore, there is no need to replace the scalpel as in the related art, and efficient work can be performed.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an eyelet cutting device according to the present invention; FIG.

First, FIG. 1 shows an example of a program-type eyelet buttonhole sewing machine as an example to which the present invention is applied, and a sewing machine 1 is mounted on an upper surface of a machine base 2 in front, rear, left and right directions indicated by arrows X and Y. It has a movable XY table 3,
Further, a cloth presser 4 is provided on the XY table 3. The XY table 3 is driven in directions indicated by arrows X and Y by an appropriate table driving means (not shown) built in the machine base 2. The XY table 3 is provided with a recess for a punching knife 6 and a cutting knife 7 to be described later.

The sewing machine 1 has a drilling knife 6 and a cutting knife 7 arranged side by side near the sewing needle 5. That is, the drilling knife 6 is located behind the sewing needle 5, and the cutting knife 7 is located adjacent to the rear of the drilling knife 6. As shown enlarged in FIG.
The drilling knife 6 has a substantially circular blade 6a at the lower end for machining an eyelet-shaped hole, and the cutting knife 7 has
It has a linear blade portion 7a for processing a linear cut portion continuous with an eyelet-shaped hole.

Further, the sewing machine 1 is equipped with a drilling cylinder 8 which is a drilling knife actuator for vertically moving the drilling knife 6 at the upper portion, and independently of this, the cutting knife 7 for vertically moving the cutting knife 7. A pulse motor 9 which is a knife actuator and a linear motion conversion mechanism 10 such as a rack and pinion for converting the rotation of the pulse motor 9 into a vertical movement of the cutting knife 7 are mounted. The drilling cylinder 8 is an air cylinder, which constitutes a drilling knife driving means.
A cutting knife driving means is constituted by the pulse motor 9 and the linear motion conversion mechanism 10.

Next, an example of an eye-hole holing by a programmed eye-hole holing machine having the eye-hole piercing device having the above-described configuration will be described. The following operation is performed by a series of control operations in accordance with a predetermined program including a boring operation. Further, in particular, a program for associating a cutting length by a cutting knife 7 described later with data of a sewing length of a buttonhole by the sewing machine needle 5 and automatically controlling an operation corresponding to a change in the data. deep.

First, an appropriate cloth 11 on the XY table 3
Is held down by the cloth presser 4 and is carried to a predetermined position by driving the XY table 3 in the directions of the arrows X and Y by the driving means. Thereafter, the drilling knife 6 is moved downward by the operation of the drilling cylinder 8, and a substantially circular blade portion 6a at the lower end thereof is formed.
Thereby, as shown in FIG. 3A, only the eyelet-shaped holes 12 are formed in the cloth 11. After drilling this hole 12, again
The drilling knife 6 is raised by the reverse operation of the drilling cylinder 8, and the drilling knife 6 is moved to the raised position as shown in FIG.
Is waiting.

Then, the cutting knife 7 is moved down by the driving of the pulse motor 9 via the linear motion conversion mechanism 10, and the cutting blade 7a at the lower end of the cutting knife 7 is moved downward as shown in FIG.
As shown in (b), a straight cut 13 continuous with the eyelet-shaped hole 12 formed in advance of the cloth 11 is cut. Thereafter, X for controlling the operation of the table driving means
The XY table 3 is fed in the front-rear direction indicated by the arrow Y in accordance with a predetermined program by a −Y control device (not shown). As shown in (c), a straight cut portion 14 having a predetermined length A is cut.

After the necessary straight cuts 14 have been made in this way, the cutting knife 7 rises again by the reverse rotation of the pulse motor 9, and the cutting knife 7 stands by at the raised position as shown in FIG. You. Thereafter, the sewing machine 1 is driven while driving the XY table 3 in the directions of the arrows X and Y.
By the operation described above, the hole sewing according to a predetermined program is performed by the sewing machine needle 5 along the periphery of the hole 12 and the linear cutout 14. As a result, an eyelet forming a buttonhole is formed.

As described above, by operating the cutting knife 7 independently of the drilling knife 6, a predetermined length is formed by the cutting knife 7 continuously with the eyelet-shaped hole portion 12 previously drilled by the drilling knife 6. Since the straight cut portion 14 having the size A can be formed, the eyelet hole can be cut efficiently without the need to replace the scalpel as in the related art, which can contribute to improvement in workability.

In the above embodiment, the actuator for the drilling knife is an air cylinder and the actuator for the cutting knife is a pulse motor. However, the present invention is not limited to this. As for the configuration of each driving means including the one described above, an appropriate one can be adopted. In addition, it goes without saying that specific detailed structures and the like can be appropriately changed.

[0020]

As described above, according to the eyelet hole cutting device according to the present invention, independently of the hole scalpel having a substantially circular blade for machining the eyelet-shaped hole, the hole is continuously connected to the hole. In order to operate a cutting knife with a straight blade that processes a straight cut, the required length according to the change in the size of the eyelet hole as a buttonhole is eliminated, eliminating the conventional work of replacing the knife. The notch can be cut, so that workability can be improved.

[Brief description of the drawings]

FIG. 1 is an external perspective view showing an example of a programmed eyelet buttonhole sewing machine as an example to which the present invention is applied.

FIG. 2 is an enlarged perspective view showing a scalpel and a scalpel of the eyelet scalpel according to the present invention;

3A and 3B show an example of the processing of an eyelet hole according to the present invention, wherein FIG. 3A is a plan view showing a state in which only a hole portion is opened by a drilling knife, and FIG. FIG. 4C is a plan view showing a state where a necessary cut length is processed by moving a table.

FIG. 4 is an external perspective view showing an example of a conventional programmed eyelet buttonhole sewing machine.

FIG. 5 is a plan view showing an example of processing of an eyelet hole, in which (a) shows a hole portion and a linear cut portion by simultaneous punching,
(B) is a top view which shows the stitch | hole of the hole.

FIG. 6 is an enlarged perspective view showing the shape of a blade portion of a conventional eyelet scalpel.

[Explanation of symbols]

 Reference Signs List 1 sewing machine 2 machine stand 3 table 4 cloth holder 5 sewing machine needle 6 drilling knife 6a substantially circular blade 7 cutting knife 7a linear blade 8 actuator for drilling knife 9 actuator for cutting knife 10 linear motion conversion mechanism 11 sewing Cloth 12 Holes 13, 14 Straight cuts

Claims (1)

(57) [Scope of request for utility model registration] 1. An apparatus for cutting an eyelet in which a hole and a linear cutout are continuous on a cloth on a movable table, comprising: a drilling knife having a substantially circular blade for processing the hole; Drilling knife driving means for operating a drilling knife, a cutting knife having a linear blade for machining the linear cutting section, and a cutting knife driving means for operating the cutting knife independently of the drilling knife. An eyelet cutting device, comprising: