JPS63270084A - Transfer apparatus of sheet material for sewing machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a sewing machine for sewing sheet materials such as cloth or vinyl sheets, and more particularly to a conveying device for the sheet materials.

(Prior art) As a conventional technology, a sewing machine is equipped with a base equipped with a feeding mechanism that transports sheet material in the front and rear directions to a needle that moves up and down, and the sheet material placed on the base is moved in the front and back direction by the feeding mechanism. There has been a sewing machine that sews the sheet material by reciprocating the needle in the vertical direction while conveying the sheet material.

(Problems to be Solved by the Invention) In the conventional device described above, the sheet material feeding mechanism was a small one located near the needle, so it was not possible to hold the sheet material in a predetermined direction during sewing. There wasn't.

Therefore, when sewing, it is necessary for a worker to hold the sheet material in a predetermined direction, which is time-consuming and requires one worker for each sewing machine, which saves labor. There were drawbacks that hindered development.

SUMMARY OF THE INVENTION An object of the present invention is to provide a novel transporting device for horizontal sewing sheet materials that eliminates the above-mentioned drawbacks.

(Means for Solving the Problems) In order to solve the above-mentioned drawbacks, the present invention is constructed as follows.

That is, a sewing machine driven by a first motor is provided on the base, and a pair of vertically opposed belt conveyors are placed in contact with each other and extend in the front and back direction along the base, and the bobber of one belt conveyor and the other A pulley of a belt conveyor is connected to a second motor and a swinging arm of a crank mechanism via a one-way clutch, respectively, and a rotating body of the crank mechanism is connected to the first motor to transmit torque from each one-way clutch. is set so that the contact part of each belt conveyor rotates from the front to the rear with respect to the sewing machine, and when the sheet material placed on the base reaches the needle part of the sewing machine, the first motor is driven and This configuration includes a control device that stops the second motor.

(Function) Since the present invention has the above configuration, the sheet material supplied between each belt conveyor is as follows.

It will be held between the abutting portions of the two.

When the second motor is driven, one belt conveyor connected to the second motor is driven via a one-way clutch, and at the same time, the other belt conveyor is driven idly by the frictional force of the contact portion. .

As a result, the sheet material is transferred from the front to the rear of the sewing machine on the base while being held between both belt conveyors.

Then, when the sheet material reaches the needle of the sewing machine,
The control device drives the first motor and the second motor.
The motor is stopped, the other belt conveyor is intermittently driven via the crank mechanism and the one-way clutch, and at the same time, one belt conveyor is intermittently idly driven by the frictional force of the contact portion.

As a result, the sheet material is intermittently transferred from the front to the rear of the sewing machine while being held between both belt conveyors, and is sewn by the needle of the sewing machine.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

In the drawings, FIG. 1 is a schematic side view showing an embodiment of the present invention, and FIG. 2 is a rear view thereof.

1 and 2, reference numeral 1 denotes a base, to which a sewing machine 2 driven by a motor 2a is fixed in an upright position.

The sewing machine 2 is a commercially available product, and has a needle 3 at the bottom of its head that reciprocates in the vertical direction, and a feed mechanism 4 that transports the sheet material (A) to the needle 3 in a horizontal direction, that is, from the front to the rear. has.

This feeding mechanism 4 presses the upper surface of the sewn portion of the sheet material (A) toward the base with an L-shaped presser foot 5 attached to the head of the sewing machine 2, and the lower surface of the sewn portion is attached within the base 1. It is pressed from below by the feeder 6 and is transferred from the right to the left (from the front to the rear) in FIG.

Reference numeral 10 denotes a transfer device which constitutes the gist of the present invention, and is constructed as follows.

That is, as shown in FIG. 1, at the center of the upper surface of the base 1, the lower belt conveyor 11 is arranged at the lower part, and the upper belt conveyor 20 is arranged at the upper part.

The lower belt conveyor 11 is constructed by winding the lower belt 12 around pulleys 13 and 14 supported on the right (front) and left (rear) parts of the base 1 on the outside of the head of the sewing machine 2. A pulley 14 is connected to a motor 16 via a one-way clutch 15, and the upper surface of the lower belt 12 is connected to the base 1.
It is arranged so that it is approximately on the same plane as the Note that 17 is a drive belt.

Further, the upper belt conveyor 20 has upper belts 21 on its right and left parts above the lower belt conveyor 11.
Place the pulleys 22 and 23 around which the left pulley 2 is wound.
3 is supported via a one-way clutch 24 on a support shaft 26 to which the lower end of a swing arm 25a of a crank mechanism 25 is connected;
The right pulley 22 is rotatably supported by a bracket 31 which is vertically movably supported by an elevating cylinder 30, and the lower surface of the upper belt 21 is in contact with the upper surface of the lower belt 12.

The crank mechanism 25 includes a disc crank 2 that is a rotating body.
5b is connected to a pulley 29 coaxial with the flywheel of the sewing machine 2 via a drive belt 28, and the outer circumferential portion of the disc crank 25b and the upper portion of the swing arm 25a described above are connected by a pin with a pin 25c.

Furthermore, the direction of torque transmission of each of the one-way clutches 15 and 24 is such that the contact portions of the upper and lower belts 12 and 21 move from the right (front) to the left (rear) in FIG. 1 with respect to the sewing machine 2. Set it in the direction of rotation.

In addition, in FIGS. 1 and 2, 32 is a push ball that is moved up and down by a suppression cylinder 33, and each belt 1
This is for pressing the sides of the sheet material (A) exposed outward from 2 and 21.

In addition, in Figures 1 and 2, 34 is a sheet member (A).
It is a U-shaped curl tube that bends the side end of the needle 3, and is arranged to extend in front of the needle 3, and the depth of the groove is
The area becomes shallower as it approaches the area.

In addition, as shown in FIG. 1, first to third sensors 35 to
Arrange 37.

Each of these sensors 35 to 37 is a photo sensor that detects the arrival of the sheet material (a), and the first sensor 3
5 is placed just to the right (front) of the upper belt 21, the second sensor 36 is placed just to the right of the needle 3, and the third sensor 37 is placed just to the right of the needle 3.
is placed directly to the left of the remittance money 6.

40 is a control device, which includes a sensor circuit 42 that inputs detection signals from each of the sensors 35 to 37, and motors 2a and 16.
, the sewing machine 2, a drive circuit 43 for driving and controlling the cylinders 30 and 33, and a control section 41 for issuing an output signal to the drive circuit 42 in response to an input signal from a sensor circuit 41, and has the following circuit configuration.

That is, the operation of the first sensor 35 starts the motor 16 and causes the suppression cylinder 33 to extend, and the operation of the second sensor 36 causes the motor 16 to stop and the sewing machine 2 (motor 2a) to rotate in the normal direction.
The circuit is configured such that the elevating cylinder 30 is shortened by the operation of the sensor 37, the sewing machine 2 is driven in reverse, and after a predetermined time, the elevating cylinder 30 is extended, and the sewing machine 2 is again driven in the forward direction.

Next, the operation mode of the above embodiment will be explained.

First, when the sheet material (A) is placed on the lower belt 12, the first sensor 35 turns on and starts the motor 16.
The lower belt 12 is actuated via the one-way clutch 15 in a direction in which its upper surface moves to the left in FIG. 1, and at the same time the pressing cylinder 33 is operated to extend downward.

As a result, the sheet material placed on the lower belt 12 (
The sheet material (A) is held between the upper and lower belts 21 and 12 and continuously transferred (quickly fed) to the left, and during this transfer, the end of the sheet material (A) is bent inward by the curl tube 34. In addition, the outer part of the sheet material (A) exposed to the outside from each belt 12 and 21 by the push ball 32 is attached to the base 1.
Pressure in this direction prevents this part from lifting up.

Then, due to the arrival of the sheet material (a), the second sensor 3
6 turns on, the motor 16 is stopped and the sewing machine 2 is driven in normal rotation.

As a result, the crank mechanism 25 is activated, and the upper belt 21 is intermittently driven via the one-way clutch 24 in a direction in which its lower surface moves leftward in FIG. is driven and the sheet material (
Sew the green part in a), that is, the above folded part.

Next, with the arrival of the sheet material (a), the third sensor 3
When 7 is turned on, the lifting cylinder 30 is shortened upward and the sewing machine 2 is driven in reverse.

As a result, the upper belt 21 is moved upward and the belt 12.
The sheet material (A) is released from being held by the sewing machine 21, and the sheet material (A) is transferred to the feed mechanism 4 by reversing the sewing machine 2.
While being transferred to the right (front) by the needle 3, the sewing material is sewn by the needle 3.

Next, this elevating cylinder 30 is activated by the operation of a sensor (not shown) that detects the shortening operation of the elevating cylinder 30.
As well as operating the extension.

The sewing machine 2 is again driven in normal rotation, and the upper belt 21 is intermittently transferred to the left via the crank mechanism 25, while the folded portion of the sheet material (A) is sewn to the end.

Note that the reverse drive of the sewing machine 2 is performed to firmly sew the starting end of the sheet material (A), and the upward movement of the upper belt 21 by the lifting cylinder 30 during the reverse drive is performed by the sewing machine 2. This is to prevent the sheet material (A) from twisting during reverse sewing.

(Effects of the Invention) As is clear from the above description, the present invention is capable of transporting a sheet material from the front to the rear of a sewing machine while holding the sheet material between a pair of upper and lower belts, and transporting the sheet material to the sewing machine section. When the machine arrives, the crank mechanism and one-way clutch are used to intermittently transport the material in accordance with the sewing speed of the sewing machine, making it possible to maintain the orientation of the sheet material in a predetermined direction and sew it automatically. This has the effect of saving labor.

[Brief explanation of drawings]

FIG. 1 is a schematic side view showing an embodiment of the invention, and FIG. 2 is a rear view thereof. 1: Base, 2: Sewing machine, 3: Needle, 4: Feeding mechanism, 10
: Transfer device, 11/20: Lower/upper belt conveyor,
12/21: Lower/upper belt, 15/24 one-way clutch, 16: Motor, 25: Clutch mechanism, 25a:
Swing arm, 25b = disc clutch, 25c: rod. 26: Support shaft, 30: Elevating cylinder, 34: Curl pipe,
35 to 37: first to third sensors, 40: control device, (
A): Sheet materials. Application agent Hisashi Matsumoto

Claims (1)

[Claims] 1. A sewing machine driven by a first motor is provided on the base, and a pair of vertically opposing belt conveyors are placed in contact with each other and extended in the front and back direction along the base, and the pulley of one belt conveyor is connected to the pulley of the other belt conveyor. The pulleys of the belt conveyor are connected to the second motor and the swinging arm of the crank mechanism via one-way clutches, and the rotating body of the crank mechanism is connected to the first motor, and the torque transmission of each one-way clutch is The abutment part of each belt conveyor is set in a direction that rotates from the front to the rear with respect to the sewing machine, and when the sheet material placed on the base reaches the needle part of the sewing machine, the first motor is driven and the second 1. A sheet material transfer device for a sewing machine, comprising a control device for stopping two motors.