JPH0144352B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a monofilament feeder that feeds monofilaments in fixed length increments, and particularly to a monofilament feeder suitable for quantitatively feeding monofilaments of thermoplastic adhesive. .

[Conventional technology and its problems]

2. Description of the Related Art As a device that sequentially feeds monofilaments of a certain length in a certain direction, for example, a filamentous solder supply device is known.

The above-mentioned apparatus uses a motor or the like as a driving source to send out the monofilament, and therefore the apparatus itself has to be large in size. especially,
For sewing machines, there was a strong desire to incorporate a device to feed monofilament of thermoplastic adhesive used for temporarily fixing cloth when folding it, but this was not possible because the device itself could not be made smaller. The problem was that it was difficult.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a monofilament feeder that can sequentially feed monofilaments of a fixed length and can be miniaturized.

[Means for solving problems]

The present invention achieves the above object by providing the following monofilament feeder.

That is, a monofilament inlet is provided at one end of the cylinder, a monofilament supply port is provided at the other end, a driving air hole is provided near the introduction port, and a ventilation hole is provided near the supply port. A monofilament feeder that introduces a monofilament from the introduction port and feeds it forward by a fixed length from the supply port, and is attached to the supply port side in the cylinder by air pressure from the air hole. The monofilament is inserted into the piston and the collector chuck, and the monofilament is inserted into the piston and the collector chuck. The filament is moved while being gripped by a collector chuck, and moved with the grip released during the return movement, and gripping and release by the collector chuck are performed by tightening and releasing the grip by the collector ring of the collector chuck, respectively. A monofilament feeder characterized by:

〔Example〕

An embodiment of the monofilament feeder of the present invention shown in the drawings will be described below.

FIG. 1 is a front half-sectional view showing the monofilament feeder. FIG. 2a is an enlarged left side view showing the collection chuck of the monofilament feeder, and FIG. 2b is a half sectional view in the front direction thereof.

The monofilament feeder shown in the embodiment has a cylinder 1, and the cylinder 1 is composed of a cylinder body 2, and a front end member 3 and a rear end member 4, which are screwed onto both sides of the cylinder body 2, respectively. A monofilament introduction port 5 is provided at the front end of the front end member 3 (one end of the cylinder 1), and a monofilament supply port 6 is provided at the rear end of the rear end member 4 (the other end of the cylinder 1). Each is provided. Furthermore, guide tubes 5a and 6a are fitted into the introduction port 5 and the supply port 6, respectively.

The monofilament feeder is configured to introduce the monofilament A into the cylinder 1 from the introduction port 5, and sequentially feed the monofilament A forward by a fixed length from the supply port 6. .

In the vicinity of the introduction port 5, there is a driving air hole 8 for supplying air into the cylinder 1 in order to drive the piston 7 forward, which will be described next.
In the vicinity of the supply port 6, vent holes 9 are provided for discharging and inhaling air according to the reciprocating movement of the piston 7, respectively. A threaded groove is cut into the driving air hole 8, so that an air supply nozzle (not shown) can be screwed into the drive air hole 8.

Inside the cylinder 1, the piston 7, which is biased by air pressure supplied from the air hole 8 and capable of reciprocating movement, is slidably inserted on the side of the introduction port 5. A collect chuck 10 that reciprocates in conjunction with the piston 7 is screwed onto the piston 7 on the side of the supply port 6, and a collect ring 11 is removably wound around the collect chuck 10.

The piston 7 and the collector chuck 10 are both hollow, and the monofilament A is inserted through them. As shown in FIG. 2a when viewed from the distal end, the collector chuck 10 is positioned at a central angle of about 120 degrees, with three points extending toward the periphery from the axial center.
A book slit 10a is formed and the collection chuck 10 is divided into three parts. This slit 10a is formed with a predetermined length in the longitudinal direction as shown in FIG.
1 to grip the enlarged diameter portion at the tip of the collect chuck 10, the monofilament A inserted through the center of the collect chuck 10 can be grasped, and the tightening by the collect ring 11 can be released.
In other words, the monofilament A can be released from gripping by moving the collector ring 11 to the small diameter portion in the right direction in the drawing from the enlarged diameter portion at the distal end.

Further, in the monofilament feeder, a spring 13 is disposed between the piston 7 and a wall portion 12 protruding from the inner wall of the cylinder body 2 toward the center thereof, and the spring 13 causes the piston to 7 is energized.

Next, the operation of the monofilament feeder of the embodiment will be explained based on FIGS. 1, 3, and 4.

FIG. 1 shows a state in which the piston 7 has completed its backward movement and is about to start its forward movement, and at this point the collect ring 11 is
0 is strongly tightened, monofilament A
is securely gripped by the collector chuck 10.

Next, by supplying air from the drive air hole 8 to the rear space within the cylinder 1 in the direction of the arrow, the piston 7 moves (forward) in the direction of the supply port 6 due to the air pressure. At this time, air is discharged from the ventilation hole 9 in the direction of the arrow. As the piston 7 moves forward, the monofilament A also moves in the same direction while being held by the collection chuck 10.
As a result, the monofilament A is sent out from the supply port 6.

When the piston 7 moves to the position shown in FIG.
When it comes into contact with the rear end surface 3a and moves further in the same direction, the collect ring 11 is removed from the collect chuck 10 as shown in FIG. Therefore, the tightening of the collect chuck 10 by the collect ring 11 is released, and as a result, the grasping of the monofilament A by the collect chuck 10 is also released, and the forward movement of the monofilament A is stopped.

When the grip on the monofilament A is released as described above, the supply of air from the drive air hole 8 is stopped, and conversely, the air in the cylinder 1 can be discharged from the air hole 8 in the direction of the dashed arrow. Make it. As a result, the piston 7 is biased toward the introduction port 5 by the action of the spring 13 and starts to move backward.

As the piston 7 approaches the position shown in FIG.
moves toward the enlarged diameter tip of the collect chuck 10 and tightens the collect chuck 10. When the piston 7 completes its return movement, the collector chuck 10 returns to the state shown in FIG. 1 in which it is firmly tightened by the collector ring 11.

During the above-mentioned return movement, the monofilament A moves with the grip of the collection chuck 10 released, and since the monofilament A is supported by the brake 6b, the monofilament A is sent out without being pulled back. The monofilament A remains in the same position, so that the monofilament A is always moved forward by a constant length.

Therefore, by repeating the above-mentioned reciprocating motion of the piston 7, monofilaments A of a fixed length are sequentially fed out from the supply port 6.

Further, in the monofilament feeder, the length of the monofilament A fed out in one reciprocation of the piston 7 is determined by the distance between the left side surface of the wall portion 12 and the rear end surface 3a of the front end member 3. By adjusting the depth at which the monofilament A is screwed into the cylinder body 2, the length of the monofilament A to be fed out can be adjusted, and the screwed depth can also be fixed with the set screw 14. be.

In the monofilament feeder described above, the piston 7 can be driven using air pressure, and the mechanism is simple, so that the device itself can be miniaturized. Therefore, it is possible to easily incorporate the monofilament feeder into other devices. For example, by incorporating it into a sewing machine (not shown) as a feeding device for supplying thermoplastic adhesive, it is possible to easily supply the adhesive when folding cloth or temporarily fixing cloth. This also has the practical effect of improving the efficiency of sewing work.

The monofilament feeder of the embodiment can be gripped by the collection chuck 10.
It is possible to send out various monofilaments regardless of their material, and in particular, it is possible to easily send out flexible monofilaments with no buckling strength.

Further, in the embodiment, an example is shown in which the backward movement of the piston is biased by a spring, but the present invention is not limited to this, and for example, the piston may be biased by pneumatic pressure in the same way as the forward movement.

〔Effect of the invention〕

The monofilament feeder of the present invention can sequentially feed monofilaments of a fixed length and can be downsized. Therefore, the monofilament feeder of the present invention can be easily incorporated into other devices. For example, by incorporating it into a sewing machine as a feeding device for thermoplastic adhesive, it can be used for folding fabrics, temporarily fixing fabrics, etc. This makes it possible to easily supply the above-mentioned adhesive to.

[Brief explanation of drawings]

FIG. 1 is a front half-sectional view showing the monofilament feeder, FIG. 2 a is an enlarged left side view showing the collection chuck of the monofilament feeder, and FIG. 2 b is a front half-sectional view of the monofilament feeder. , 3 and 4 are half sectional views of the monofilament feeder for explaining the operation. A...Monofilament, 1...Cylinder, 5
...Introduction port, 6... Supply port, 7... Piston, 8
...Air hole, 9...Vent hole, 10...Collection chuck, 11...Collection ring, 13...Spring.

Claims (1)

[Claims] 1. A monofilament inlet is provided at one end of the cylinder, and a monofilament supply port is provided at the other end, and a driving air hole is provided near the introduction port, and a driving air hole is provided near the supply port. A monofilament feeder is provided with ventilation holes in each of the cylinders, and the monofilament is introduced from the introduction port and fed forward by a fixed length from the supply port, and the cylinder has the air hole on the supply port side. The monofilament is inserted into the piston and the collector chuck, and the monofilament is inserted into the piston and the collector chuck. During the forward movement, the monofilament is moved while being gripped by the collector chuck, and during the backward movement, the monofilament is moved with the grip released, and gripping and release by the collector chuck are performed by tightening and releasing the grip by the collector ring of the collector chuck, respectively. A monofilament feeder, characterized in that the monofilament feeder is configured to be 2. The monofilament feeder according to claim 1, wherein the piston is urged in its backward movement direction by a spring.