JPH0139793B2 - - Google Patents

Description

[Detailed Description of the Invention] Conventionally, when sewing fixed nets, purse nets, pole nets, fish tank nets, etc., sewing together nets is an important element that occupies most of the sewing work, but it all depends on manual labor. This requires a lot of manpower and time. The work involves winding the sewing thread around the mesh needle, and as shown in Figure 1, aligning the edges of the two mesh fabrics A and B stitch by stitch, insert the mesh needle into the eyes, and sew the sewing thread at regular intervals. The method involves inserting knots to prevent fraying, which is all done manually and requires a lot of patience.

This is a problem that needs to be solved urgently, as the fishing industry is getting older and nets are becoming more diversified and larger.
The major reasons why this work could not be mechanized include the wide variety of mesh sizes and numbers (thickness of the threads), as well as the fact that the mesh can freely expand and contract in the vertical and horizontal directions, making it difficult to The main reason was that we could not find a way to match them reliably.

The invention successfully solves the above-mentioned problems, and can be sewn into the desired hanging bag (size) several times faster than by hand, and can be provided to fishermen quickly and at low cost. be.

Hereinafter, an example of implementing the present invention will be described based on the accompanying drawings.

The present invention partially improves a commercially available sewing machine so that sewing can be performed mechanically by utilizing the relationship between the upper thread and lower thread of the sewing machine. Needle 3 with one turn of the pulley
makes one reciprocation in the vertical direction on the table 4.

5 is an iron piece attached to one location on the outer circumference of pulley 2;
Reference numeral 6 denotes a proximity switch provided at an outer position corresponding to the pulley 2, and the rotation speed of the pulley 2 is detected by the proximity switch 6.

Normally, the needle 3 makes one reciprocation with one rotation of the pulley 2, so this is also the number of stitches. At this time, 8a is a counter for setting the number of stitches, 8b is a sagging pitch counter for setting conditions such as how many stitches to sew, and 8c is a counter for setting the number of stitches to sew. The number of stitches is set higher than the normal number.

3 and 4 schematically show the entire apparatus, the former being a side view and the latter being a plan view. In addition, FIG. 5 is a partial detailed enlarged view of the chain dotted circle in FIG. 3.

In each figure, 10 is a pair of meshes A and B to be sewn at the front position of the sewing machine main body 1, so that the ears are aligned by a certain size corresponding to the mesh pitch and sent to opposite parallel states on a plane. A conveyance device that
A pair of freely rotating rollers 11a and 11b are arranged opposite to each other with a fixed distance between them, and a belt 12 is stretched between both rollers, and a large number of iron pieces 13 are buried at fixed intervals on the upper surface of the belt 12. It becomes.
Here, the distance l between adjacent iron pieces 13 is made equal to the seam pitch p of the mesh. In addition, 1
Reference numeral 4 denotes a locking pin implanted on the belt 12, which is provided at a symmetrical position sandwiching the longitudinal center demarcation line O-O' of the belt 12, and is connected to joint portions K and K of the sewn mesh. ' and move to nets A and B all at once.

15 is a belt 1 in which the iron piece 13 is embedded;
This is a proximity switch provided at a lower position on the second side, and when the iron piece comes into contact with the proximity switch 15 due to the rotation of the belt, the rotation of the drive motor described below is stopped.

16 is a feed roller, 17 is its rotating shaft, and a known one-way clutch 18 is provided at the end of the shaft, and this is operated by a lever 19 that swings in conjunction with the rotation of the sewing machine pulley. The roller 16 is rotated intermittently so that the net is slightly fed. It also serves to disconnect the lever 19 when the feed roller 16 is rapidly fed by the motor, which will be described below.

Reference numeral 20 denotes a motor for rapidly feeding the feed roller 16 according to the mesh pitch p, and the rotation of the motor 20 rotates the rotation shaft 17 via gears 21 and 22. At this time, reference numeral 23 is a one-way clutch provided at the gear 21 to prevent intermittent rotation by the lever 19 from being transmitted to the motor 20 while the motor 20 is stopped. The motor 20 is turned on when the iron piece 5 comes into contact with the proximity switch 6 due to the rotation of the pulley 2, and thereby the feed roller 16 is turned on.
rotates to send out the net, and at this time, the conveyor belt 12 rotates with the net locked by the pin 14, and when one of the iron pieces 13 buried on the belt comes into contact with the proximity switch 15, it is turned off. Specifically, this is the period during which the needle 3 is pulled upward from a position a little far away on the mesh in the third illustrated example, and then descended until it comes to the same position, and during this period, the motor 2
0 drive, the feed roller 16 is rapidly fed and passes through the joints K and K' between the meshes, and is fed by the distance F between the meshes. This prevents the needle from piercing the joints K, K', etc. during the feeding of the net. After this, the needle enters between the meshes and stitches adjacent meshes, but if the number of stitches to be driven is other than 1, that is, 2, 3, etc., the motor 20 is turned off. is pulley 2
This is done every two or three rotations, and this is done by setting the number of stitches setting counter 8a.

The present invention is constructed as described above, and its usage will now be described. First, a belt 12 in which iron pieces are embedded at equal intervals according to the mesh size (pitch P) is stretched between rollers 11a and 11b.

Next, the number of stitches to be driven is set using the stitch number setting counter 8a. On the other hand, the minute intermittent feed amount of the feed roller 16, that is, the driving pitch of the needle 3, is adjusted as appropriate by the existing adjustment device installed in the sewing machine body, depending on the mesh size, number of stitches, etc.
The distance E in FIG. 5 is determined by this setting of the number of stitches and the latter adjustment of the driving pitch.

On the other hand, depending on the fixing pitch, that is, how many stitches the fixing is to be performed, for example, if this is set to 4, the fixing will be done every fourth stitch. On the other hand, 8c is a counter for setting the number of stitches to prevent unraveling, and is set to a number greater than the normal number of stitches.

When the above-mentioned operations are completed, as shown in FIG. 4, the nets A and B to be sewn are passed through the center line position O-O' of the belt 12, and the nets A,
Sewing machine body 1 while locking the ears of B with pins 14.
The nets A and B are made to be guided to the lower surface of the presser plate 25 and the feed roller 16 on the side, and an appropriate tension is applied to the nets A and B.

Then, the sewing machine needle is started from above point (A) in FIG. 5, and the nets A and B are moved by the interval E in FIG. During that time, only the set number of stitches are inserted, and at the end of the E interval (the end of the set number of stitches),
In other words, when reaching the point (b), the number of stitches setting counter 8a
The motor 20 is turned on by the command of
By the time the needle comes out of the net and comes down again after doing step B, the rotating shaft 17 is rotated via the gears 21 and 22 to rapidly advance it to the end point (c) of the interval F.
At this time, the rapid feed speed is such that the rotating shaft 17 is continuously rotated at a speed exceeding the minute feed speed by the lever 19, and the connection with the lever 19 is severed by the one-way clutch 18, while the belt 12 is connected to the pin 14. It is pulled by the joints K and K' and moves together with the net, and when one of the iron pieces 13 on the belt reaches the proximity switch 15, the motor 20 is turned off and the rapid feed is canceled. It is.

This release is at point (C) where the nets A and B have moved a distance F, and then the rotation of the feed roller 16 is switched to minute intermittent rotation by the operation of the lever 19, and during this time the rotation is changed by the setting counter 8a. The stitches are sewn using the specified number of stitches. Thereafter, the process is repeated in the same manner, and when the set number of stitches is reached, the unraveling is stopped at that location by the number of stitches set by the anti-unraveling pitch setting counter.

In the present invention, the pins 14 are implanted at pitches that are an integral multiple of the mesh size, and while the net is moving, they automatically enter fixed positions between the meshes one after another, and the belt 12 is always attached to the mesh. It will move in the same way.

FIG. 6 is a partially detailed view showing the nets A and B sewn together in this way, and in the figure, m is the upper thread and n is the lower thread. This example is an example in which the number of stitches to be driven is 2, the number of stitches to prevent raveling is 4, and the number of stitches to prevent raveling is 4. In this example, lockstitch zigzag is used as the sewing machine sewing method, but the present invention is not limited to this, and various known methods can be employed.

As described above, the present invention allows the sewing work to be carried out completely mechanically, and there is no possibility that the sewing needle will pierce the net yarn or its knotted portions. Therefore, it goes without saying that the net will not be damaged, and it is possible to freely insert any number of stitches and prevent them from unraveling, contributing to a dramatic improvement in work performance.

It should be noted that the present invention can be used by making slight modifications to existing sewing machines, does not require any skill, is inexpensive and can be implemented quickly, and can meet the needs of a wide range of fishermen. It is.

[Brief explanation of drawings]

Fig. 1 is a partial detailed view showing a conventional sewing net, Fig. 2 is a schematic diagram of the main body of the sewing machine used in the present invention, Fig. 3 is a schematic side view of the entire device, and Fig. 4 is the same plane. 5 is a partially detailed enlarged view of the dot-dash line circle in FIG. 3, and FIG. 6 is a partially detailed view showing the sewn net according to the present invention. 1... Sewing machine body, 2... Sewing machine pulley, 3
... Needle, 5 ... Iron piece, 6 ... Proximity switch, 8a
... Stitch number setting counter, 8b... Anti-raveling pitch setting counter, 8c... Unraveling prevention stitch number setting counter, 10... Conveyance device, 11a, 11b...
...roller, 12...belt, 13...iron piece, 1
4... Locking pin, 15... Proximity switch, 16...
...Feed roller, 17... Rotating shaft, 18... One-way clutch, 20... Motor, 21, 22...
Gear, 23...one-way clutch.

Claims (1)

[Claims] 1. A conveying device that allows a pair of meshes to be sewn to be fed in a parallel state facing each other on a plane with the edges aligned by a certain size corresponding to the mesh pitch. Iron pieces are embedded at intervals corresponding to locking pins and mesh pitches for hooking an appropriate number of knots, while sewing machines are equipped with a detection means to detect the rotation of the main spindle pulley for needle movement. On the other hand, it consists of a lever that swings in conjunction with the movement of the needle of the sewing machine, and a feed roller that is rotated reciprocatingly by the lever to minutely feed the net, and the feed roller is driven by a separate motor and connected to the main shaft pulley for needle movement. When the detection means for detecting the rotation of the conveyor is turned on, fast forwarding is performed between the joint parts, and when a proximity switch is turned off at the joint joint position using an iron piece embedded in the belt of the conveying device, the fast forwarding is canceled. A device for sewing net fabrics.