JPS6350306Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is an electric drag drag machine that pierces the yarn from the back side of the base fabric and leaves the loop of the yarn protruded on the surface of the base fabric in a cut or loop shape. It is related to.

Conventional technology and its problems Conventionally, this type of electric hook drag machine has a needle that can reciprocate with a constant stroke, and a needle that can reciprocate with a constant stroke independently of the needle and has a needle inside the needle that can reciprocate with a constant stroke. and a pusher housed in the needle, and is configured to transmit rotational force from an electric motor to the needle and the pusher via cam means, and the yarn is secured to the tip of the pusher by applying back tension. Advance the needle and pierce the base fabric from the back side to open a path for the yarn, advance the pusher to plant the yarn in a loop on the surface of the base fabric, and cut this loop at the top with a cutter attached to the pusher. There are various types of devices available.

In this device, a crank disk as shown in, for example, Japanese Utility Model Publication No. 55-28795 was used as a cam means for reciprocating the needle and pusher using the rotational force from the electric motor.

However, in this device, the relationship between the crank disc, the needle, and the pusher, that is, the stroke of the needle and pusher, is kept constant, and the stroke cannot be adjusted. Therefore, in order to change the thread length by changing the stroke of the pusher, the crank disc itself must be replaced.
Since this is extremely inconvenient, in practice it has been necessary to prepare a dedicated hook drag machine for each length of thread.

Means for Solving the Problems Therefore, in order to solve the above problems, the present invention has two camshafts mounted on a cam wheel that can be driven to rotate by transmitting the rotational force from an electric motor. It is characterized in that the eccentric position is adjustable and fixed, and each camshaft, needle, and pusher are connected via a connecting rod.

Embodiment Hereinafter, an embodiment of the electric hook drag machine according to the present invention will be described with reference to the accompanying drawings.

The main body 1 is composed of a housing assembly 2, a grip 3, and an upper mount 4, and a pusher 20 equipped with a needle 10 and a cutter 25 is disposed in a slide holder 5, and a cam means 50, which will be described below, is installed in the slide holder 5.
It is installed so that it can move back and forth with a constant stroke.

A well-known electric motor (not shown) is built in the abdomen 2a of the housing assembly 2 that is continuous with the grip 3, and its output pinion 49 meshes with the gear 32 of the rotational force transmission means 30 by electromagnetic induction. .

As shown in FIG. 2, this rotational force transmitting means 30 fixes the gear 31 and a drive member 33 to one end of a drive shaft 31, and has an excitation coil 34 built into the drive member 33. Driven shaft 4 provided coaxially with shaft 31
The driven member 41 is fixed at the position 0, and the cup portion 41a of the driven member 41 is loosely fitted into the annular groove portion 33a of the drive member 33. That is, when the electric motor is started and the excitation coil 34 is energized while rotating the drive member 33, an eddy current is conducted to the cup portion 41a of the driven member 41.
The resulting magnetic field brings both members 33 and 41 into a connected state, and driven member 41 and driven shaft 40 rotate together.

On the other hand, a brake coil 43 is built into a brake member 42 that rotatably supports the driven shaft 40, and a lining 44 made of a magnetic material fixed to the outer periphery of the driven member 41 faces the end face thereof. Therefore, by energizing the brake coil 43, the lining 44 is pressed against the end face of the brake member 41 by the magnetic flux, causing the drive member 33 to rotate idly, and at the same time, the rotation of the driven member 41 is stopped.

As shown in FIG. 3, the cam means 50 includes a cam wheel 52 fixed coaxially on a cam drive base 51, and cam shafts 54, 60 and a connecting rod 58 provided at eccentric positions on the cam wheel 52. ，
62, the needle 10 and pusher 20 are moved back and forth with a constant stroke.

That is, the cam drive base 51 is rotatably mounted within the housing assembly 2, and the shaft portion 51
A bevel gear 48 fixed to the driven shaft 4
0 (see Fig. 1). The cam wheel 52 is coaxially fixed onto the cam drive base 51 with screws 53. The pusher cam shaft 54 is a cam wheel 52
It is fixed at a position eccentric from the center of rotation by screwing a screw 57 through a washer 56 into a nut 55 fitted in a groove 52a formed in the radial direction. Note that this eccentric fixing position is located in the groove 5.
It can be adjusted within the range of 2a. The connecting rod 58 loosely fits into the pusher camshaft 54 through a hole 58a at the base end, and the pusher 2 into the hole 58b at the tip end.
A pin 21 provided at the rear end of the 0 is loosely fitted.

The threaded portion 60a of the needle cam shaft 60 is inserted into the long hole 59a of the eccentric adjustment cam 59, and then the nut 61 is tightened.
The eccentric adjusting cam 59 is fitted into the cut groove 54a of the pusher cam shaft 54, and the elongated hole 59b is fixed to the eccentric adjusting cam 59 by screwing.
It is fixed by the tightening force of the screw 57 that passes through it. Note that the eccentric fixing position of the needle camshaft 60 can be adjusted within the range of the elongated holes 59a and 59b. Another connecting rod 62 has a hole 62a at its base end that loosely fits into the needle cam shaft 60.
A pin 19 fixed to the rear end of the needle 10 via a holder 18 is loosely fitted into a hole 62b at the tip, and a washer 63 is attached to the needle cam shaft 60 at the base end.
It is prevented from coming off by a screw 64 screwed in through the screw 64.

Further, a reflective photo sensor 65 (see FIG. 1) is installed around the cam wheel 52 to detect one revolution of the cam wheel 52, and as described below, energizes the brake coil 43 at the time of detection. Rotation of the driven member 41 is prevented and rotation of the cam wheel 52 is stopped.

The cam means 50 constructed as described above operates on the cam shaft 5 based on the rotation of the cam wheel 52 in the direction of the arrow a.
4 and 60 rotate at fixed different radii, and accordingly, the needle 10 and pusher 20 move forward in the direction of arrow b and retreat in the opposite direction via the connecting rods 58 and 62. In this case, needle 1
0, the stroke of the pusher 20 is the camshaft 54, 6
Depending on the eccentricity of 0, the difference in rotational phase is 100°.

On the other hand, the needle 10 has a needle-like tip so that it can pierce the base fabric. Also Pushya 2
0 is for hooking a yarn (not shown) at the tip and replacing the needle 10 that pierces the base fabric and pierces the base fabric to form a loop of yarn on the surface of the base fabric, and on the bottom surface of the needle 10. is equipped with a cutter 25. The cutter 25 has a pincer configuration and includes well-known cam means for cutting off the tip of the looped yarn when the pusher 20 is advanced to its most extreme position.

Additionally, a grip 6 is attached to the tip of the slide holder 5.
is attached via a stay 7 and a grip holder 8, and a needle point stay 9 is also attached.

Furthermore, the yarn not shown is Atsupamount 4
is inserted into the yarn guide 70 provided in the opening 5a of the slide holder 5 and the opening 10a of the needle 10.
The needle 10 is introduced into the needle 10, its tip is hooked to the tip of the pusher 20, and a back tension is applied by a leaf spring 11 provided inside the opening 10a of the needle 10.

Next, the operation of the electric hook drag machine constructed as described above will be explained with reference to FIG.

First, when a power switch of a control box (not shown) is turned on, the electric motor inside the machine starts, and the excitation coil 34 is also energized, so that the drive member 34 and the driven member 41 are electromagnetically coupled. However, since the brake coil 43 is also energized at the same time and the lining 44 is pressed against the brake member 42, no rotational force is transmitted to the cam means 50. At this time, the camshafts 54 and 60 are located at a rotation angle of 0° in FIG. 4, the needle 10 protrudes by 20 mm, and the pusher 20 protrudes by 7 mm. At this time, the tip of the needle 10 is pierced into a predetermined position of the base fabric from the back side. The protrusion is regulated by the needle point stay 9 coming into contact with the back side of the base fabric, and the amount of protrusion is determined by the needle point stay 9 with respect to the base fabric.
is 15mm, and Pushsha 20 is 2mm.

Here, when the trigger 3a is operated, the energization to the brake coil 43 is canceled, and the rotational force from the already started electric motor is applied to the drive member 34, driven member 41, driven shaft 40, and bevel gear 4.
7 and 48 to the cam drive base 51, and the cam wheel 52 rotates in the direction of arrow a.
With this, the needle 10 begins to retreat, and the pusher 2
0 starts moving forward with Katsuta 21. When the cam shafts 54 and 60 rotate 100 degrees in the direction of arrow a along with the cam wheel 52, the pusher 20 reaches its maximum protrusion position of 30 mm (25 mm based on the base fabric).
Immediately before this, the cutter 21 operates to cut off the tip of the yarn hooked onto the tip of the pusher 20 and planted in a loop. The cam wheel 52 continues to rotate in the direction of the arrow a, and the needle 10 continues to rotate.
It starts moving forward from a rotational position of 180 degrees, and reaches the maximum protrusion position of 20 mm after one rotation.At this time, the brake coil 43 is energized by the signal from the sensor 65 that detects one rotation of the cam wheel 52, and the driven member 41 is turned on. Rotation is prevented and the cam wheel 5
2 stops rotating. When the needle 10 is removed from the base fabric, there is a yarn with a length of 25 mm on the surface of the base fabric.
The yarn will be planted in The operator sticks the needle 10 into the next predetermined location, operates the trigger 3a, and then follows the same procedure to plant the threads on the base fabric.

In the above operation, in this machine, rotation transmission from the electric motor is performed by the electromagnetic induction type transmission means 30, so even if the brake means controls on/off of rotational force transmission, the mechanical There are less vibrations, shocks, and noises than the clutch means, and the cam wheel 52 rises well when the rotational force transmission is turned on, and there are no problems such as uneven lengths of the planted yarns or slanted cuts.

Furthermore, the strokes of the needle 10 and pusher 20 depend on the eccentricity of the camshafts 54 and 60. Therefore, by adjusting the amount of eccentricity of the camshafts 54 and 60, the stroke can be finely adjusted, and especially for the pusher 20, the stroke can be adjusted to 35, 40 mm, for example, by simply replacing the eccentric adjustment cam 59.
It can be changed to

If the cutter 21 is removed, the machine can also be used to plant yarn in loops on a base fabric.

Effects of the invention As is clear from the above explanation, according to the invention, the eccentric position from the center of rotation of the two camshafts is adjusted on the cam wheel which can be rotated by transmitting the rotational force from the electric motor. Since the camshafts, needles, and pushers are connected to each other via connecting rods, the strokes of the needles and pushers can be easily changed by adjusting the eccentric position of the camshafts. It is possible to plant threads of various lengths with one hook drag machine.

[Brief explanation of the drawing]

The drawings show an embodiment of the electric hook drag machine according to the present invention, FIG. 1 is a sectional view showing the overall structure, FIG. 2 is a sectional view of the electromagnetic torque transmission means, and FIG. 3 is an exploded view of the cam means. The perspective view and FIG. 4 are illustrations of the strokes of the needle and pusher. 1... Main body, 10... Needle, 19... Pin, 20... Pusher, 21... Pin, 25...
Katsu, 30... Rotational force transmission means, 50... Cam means, 52... Cam wheel, 54, 60... Camshaft, 58, 62... Connecting rod, 5
9...Eccentric adjustment cam.

Claims (1)

[Claims for Utility Model Registration] An electric motor comprising a needle that can reciprocate with a constant stroke and a pusher that can reciprocate with a constant stroke independently of the needle and is housed within the needle. An electric hook drag machine configured to transmit rotational force from the electric motor to the needle and pusher via a cam means, comprising: a cam wheel that can be rotationally driven by the rotational force from the electric motor; and a rotational force on the cam wheel. two camshafts fixed at positions eccentric from the center so as to be adjustable; a connecting rod connecting one camshaft and the rear end of the needle; and a connecting rod connecting the other camshaft and the rear end of the pusher. An electric hook drag machine characterized by being equipped with a connecting rod and the following.