JPS6219878B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is mainly aimed at long strip-shaped carpets that have not yet been cut to size. A sewing machine that sews (overlocks) the lateral side portions while transporting the material, specifically, a sewing machine that sews (overlocks) the lateral side portions while transporting the material, specifically, when a long strip-like material such as a carpet before being cut causes lateral positional displacement due to meandering during continuous transport. so that sewing can always be done in the correct position.
A pair of fixed rails are installed in a direction perpendicular or almost perpendicular to the direction of transport of a long strip that is continuously transported, and a wheel mounted on a sewing machine body having a sewing section is connected to the fixed rails. The main body of the sewing machine is moved based on the results of a sensor that detects the meandering of the long strip in a direction perpendicular or almost perpendicular to the conveying direction, and the sewing processing section moves the sewing machine to the long strip. The present invention relates to a sewing machine with a meandering control device configured to automatically follow the meandering movement of the sewing machine.

In the aforementioned sewing machine with a meandering control device, the relative position between the fixed rail and the sewing machine body, or more precisely, the relative position between the pair of fixed rails and the corresponding pair of wheels, must be set accurately. The sewing machine body tends to swing left and right along the direction of movement, and there is a risk that accurate sewing cannot be performed.
If the sewing machine body is configured to be moved by the telescopic drive of the hydraulic cylinder, there is a problem in that high precision is required when installing the hydraulic cylinder, and it takes time and effort to install the entire device.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a sewing machine with a meandering control device that can be easily installed.

The characteristic structure of the present invention for achieving the above object is as follows:
In the aforementioned sewing machine with a meandering control device, the sewing machine body is configured by fixing the sewing workpiece to a self-propelled frame, and a wheel is placed on one of the pair of fixed rails. The circumferential surface of the wheel body to be placed on the other fixed rail is formed into a smooth circumferential surface, and the circumferential surface of the wheel body placed on the other fixed rail is V
The grooved peripheral surface is formed in a shape of a letter or approximately a letter V, and this structure provides the following effects.

That is, since the sewing machine main body is configured to be self-propelled, the sewing machine main body can be smoothly moved along the fixed rail simply by placing the wheels on the fixed rail.

Moreover, the only wheel placed on one fixed rail is a wheel with a V-shaped grooved circumferential surface, and only this wheel rolls while being guided by the fixed rail, while the other wheel is guided by the fixed rail. Since the wheel body is a wheel body with a smooth circumferential surface that rolls without being guided by the fixed rails, even if there is some deviation in the installation accuracy of the pair of fixed rails, especially in the spacing,
The sewing machine body can be accurately moved along one fixed rail.

Therefore, it has become possible to easily install the entire device.

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 schematically shows the configuration of continuous sewing work on the lateral side of a carpet C as a long strip, and the tape is wound around a raw fabric roll 2 placed on a trolley 1. The removed carpet C is once lifted and transferred by the drive rolls 4, 4 at the upper end of the tower frame 3, and then the inclined guide 5 is slid and transferred downward again until it reaches the sewing machine main body A. First, the supply of the carpet C to the sewing machine body A is made to have a slack that can be allowed by roughly matching the width direction of the carpet C to the sewing machine body A, and in this way, the carpet C is supplied to the sewing machine body A.
The sewing machine body A is continuously fed through a guide roll 6 and a pair of upper and lower feed rolls 7, which are arranged to sandwich the sewing machine body A.
After the required sewing process is performed on both lateral sides of the carpet C, the process proceeds to a cutting process (not shown).

The feed rolls 7, 7 are mounted on a fixed frame 9 that stands up from the floor near the lower side of the sewing machine main body A, and the guide roll 6
is attached to a fixed frame 8 that stands up from the floor near the upper side of the sewing machine main body A, and the carpet C is transported along a horizontal or almost horizontal path by feed rolls 7, 7 and a guide roll 6. It is configured to be

As shown in FIG. 2, the sewing machine main body A has a carpet
There are two types of carpet C, one for which the left side is sewn and the other for which the right side is sewn.
It is arranged so that it can follow the meandering movement. Each sewing machine main body A is constructed by fixing a sewing part a to a self-propelled frame 15,
As shown in FIGS. 3 and 4, the frame 15
At a relatively high position, preferably near the upper end, wheels 10, 10 using V pulleys are mounted on the upper side at appropriate intervals on the left and right, and wheels using rubber rolls are mounted concentrically on the lower side. 11, 11 are mounted on shafts, and the upper wheels 10, 10 are rotatably mounted on a chevron-shaped fixed rail 12 horizontally suspended on the upper side fixed frame 8, while the lower wheels 11, 11 are It is mounted so as to be able to roll freely on a flat fixed rail 13 horizontally suspended on the lower side fixed frame 9, and is configured to be suspended with its lower end free from the floor surface. Both fixed rails 12 and 13 extend over the entire length of the fixed frames 8 and 9 in the width direction, respectively, and are connected to the two sewing machine bodies A,
It is configured so that it can be shared with A.

In each frame 15, both wheels 10, 1 on the upper side
0 is interlockingly connected at its shaft portion via a chain 14, and the shaft portion of one of the wheel bodies 10 and a reducer 16 disposed at the lower end of the frame body 15 are interlockingly connected via a chain 17, and further The speed reducer 16 and a forward/reverse switching type electric motor 18 installed in parallel with the speed reducer 16 are interlocked and connected via a belt 19, so that the speed reducer 16 is self-propelled. In other words, the two upper wheels 10, 10 are forcibly driven. On the other hand, both wheels 11, 11 on the lower side are of the free rotation type. However, both have the effect of moving the sewing machine body A along the rails 12 and 13.

A sewing section a is installed on the upper surface of each frame 15, and includes a sewing needle that moves up and down at high speed to overlock the lateral sides of the carpet C, its drive mechanism, thread feeding mechanism, etc. An electric motor 20 disposed at an upper and lower intermediate portion of the body 15 is interlocked and connected via a belt 21.

Then, it is elastically brought into contact with the lateral side edge of the carpet C from the lateral outer side on the frame 15 in the vicinity of the upper side of the sewing part a, and the lateral axis is adjusted according to the lateral positional deviation of the carpet C. A sensor S is provided which swings around the center and detects the amount of positional deviation of the carpet C based on the swing amount.Based on the detection result by this sensor S, the electric motor 18 for driving and moving the sewing machine main body is rotated in the forward rotation direction. Alternatively, a control groove B is provided in the frame 15 to automatically control how much to rotate in the reverse direction.

That is, by using the sensor S, the control mechanism B, and the electric motor 18, each sewing machine main body A is moved laterally by an amount corresponding to the positional deviation of the carpet C to follow the positional deviation of the carpet C. The structure is such that it can be automatically controlled to always perform overlock on the C lateral side at a predetermined position. The lateral movement of each sewing machine main body A is performed by moving the wheels 10, 11, . . . near the upper end of the frame 15.
. . . are provided, and the sewing machine is operated under a hanging type that rolls along the rails 12 and 13, so that the swinging movement caused by the lateral movement of the sewing machine body A,
In particular, the swinging movement of the sewing part a is much smaller than in the conventional sewing machine, and therefore extremely accurate overlocking is possible.

Furthermore, it goes without saying that if only one side of the carpet C is to be overlocked, only one sewing machine body A is required.

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.

[Brief explanation of the drawing]

The drawings show an embodiment of a sewing machine with a meandering control device according to the present invention, and FIG. 1 is an overall schematic side view, and FIG.
3 is an enlarged side view of the main body of the sewing machine, and FIG. 4 is a front view thereof. A... Sewing machine body, a... Sewing processing section, 15...
...Frame, C...Long strip, S...Sensor, 1
0,11...Ring body, 12,13...Rail.

Claims (1)

[Claims] 1 A pair of fixed rails 12 and 13 are installed in a direction perpendicular or almost perpendicular to the direction of transport of the long strip C that is continuously transported, and a shaft frame is attached to the sewing machine main body A equipped with the sewing processing section a. The wheels 10 and 11 are placed on the fixed rails 12 and 13, and a sensor S is connected to detect meandering of the long strip C in a direction perpendicular or almost perpendicular to the direction in which the sewing machine main body A is conveyed. In a sewing machine with a meandering control device configured to automatically move the sewing processing section a to follow the meandering of the long strip C by moving it based on the result, the sewing machine is attached to the self-propelled frame 15. The sewing machine main body A is configured by fixing the processing part a, and the pair of fixed rails 1
The peripheral surface of the wheel 11 placed on one of the fixed rails 13 of 2 and 13 is formed into a smooth peripheral surface, and the peripheral surface of the wheel 10 placed on the other fixed rail 12 is formed into a V-shape or A sewing machine with a meandering control device characterized by having a substantially V-shaped grooved peripheral surface.