JPH08280963A - Edge control sewing machine - Google Patents

Abstract

PURPOSE: To provide an edge control sewing machine with better workability and visibility even in its use as an ordinary machine without detecting and controlling the position of an end part of an object to be sewn in the edge control sewing machine using a contact type or non-contact type sensor for detecting the end part of the object to be sewn. CONSTITUTION: In the title edge control sewing machine which has an end part detector 100a to detect the position of the end part of an object to be sewn, a work conveying device 100b which performs a positional control and a carrying of the object to be sewn based on the detection of the end part of the end part detector, at least one of the end part detector 100a and the work conveying device 100b is allowed to retreat to such a position as not to interfere with the object to be sewn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with an end detecting device for detecting the end position of an article to be sewn and a work conveying device for controlling the position and conveying the article to be sewn. The present invention relates to an edge control sewing machine that sewes parallel to each other.

[0002]

2. Description of the Related Art As a sewing machine for performing accurate sewing in parallel along the edge of a workpiece, the edge position detecting device detects the edge position of the workpiece, and the work conveying device follows this edge detection. There is known an edge control sewing machine which advances the sewing of the end portion of the sewn item while controlling the position and conveying the sewn item.

An example of this edge control sewing machine is shown in Japanese Examined Patent Publication No. 1-191717, which is shown in FIG.
As shown in FIG. 5, the end detection device 50a is provided with a detection arm 51 and a potentiometer 52, the work transfer device is provided with a ratchet wheel 53 and casters 54, and the workpiece is carried by the ratchet wheels 53 and casters 54. , The end position of the sewn object is detected by the contact of the tip of the detection arm 51 with the sewn object, and the needle 55 is detected based on the detected end position.
There is one that controls the position of the sewing target by rotating the sewing target around the needle 13 by the ratchet wheel 53 and the caster 54 during the puncture.

Further, in flat bed sewing machines in which the vicinity of the stitch forming position is a flat surface, there are also manufactured flat bed sewing machines which use a non-contact type optical sensor for end detection.

[0005]

However, in the conventional edge control sewing machine for detecting the contact type end portion as described above, since the end portion detecting device such as the detecting arm is always provided near the stitch forming position, When performing a sewing operation (use as a general sewing machine) that does not detect the end portion of the workpiece and controls the position of the workpiece, the workability is poor because the detection arm or the like is caught by the workpiece, and the end detector is There was a problem that it was difficult to see because it blocked the view. Further, since the work transfer device is also near the stitch forming position, there is a problem that the workability is poor because the work to be sewn or the hand of the worker is hit. Further, since the end detection device such as the detection arm is always located near the stitch forming position, there is a problem that workability is poor when replacing the bobbin thread.

Further, in the edge control sewing machine which detects the end portion by the conventional optical sensor, it is possible to dispose the end portion detecting device in the vicinity of the stitch forming position, but the work transfer device always operates at the stitch forming position. Since it is located near the sewing machine, there is a problem that the workability is poor when the sewing machine is used or the operator's hand is hit. Also, using an optical sensor for edge position detection is
There is a problem that the sensor is expensive because it is limited to a sewing machine such as a flat bed sewing machine in which the vicinity of the stitch forming position is a flat surface.

The present invention has been made in view of the above problems, and is an edge control sewing machine using a contact type or non-contact type sensor for detecting an end portion of a sewing object.
An object of the present invention is to provide an edge control sewing machine having good workability and visibility even when it is used as a general sewing machine without performing end position detection and position control of a sewing object.

It is another object of the present invention to provide an edge control sewing machine in which the end detecting device does not interfere and the bobbin thread can be replaced with good workability.

[0009]

In order to solve the above-mentioned problems, in an edge control sewing machine according to claim 1, an edge detecting device (1) for detecting an edge position of a workpiece.
00a) and a work transfer device (100b) for performing position control and transfer of a workpiece based on the end position detection of the end detection device, the end detection device (100a) ) And at least one of the work transfer device (100b) can be retracted to a position where it does not interfere with the material to be sewn.

In the edge control sewing machine according to claim 2, a post type sewing machine having a post-shaped member (post 15) for accommodating a shuttle mechanism or the like is provided on the sewing machine bed (19).

The edge control sewing machine according to claim 3 is the edge control sewing machine according to claim 2, wherein the post-shaped member (post 15) is provided with the end detecting device (100a) and the shuttle cover (1). Cage,
The end detection device (100a) has a structure that can be retracted to a position where it does not interfere with the material to be sewn, and when retracted, the edge detection device (100a) can also be retracted integrally with the hook cover (1). .

[0012]

In the edge control sewing machine according to the first aspect of the present invention, when the sewing machine is used as a general sewing machine which does not require the end detection and position control of the sewn product, the end detection device and the work transfer device can be operated as necessary. At least one of them can be retracted to a position where it does not interfere with the material to be sewn. Therefore, it is possible to provide an edge control sewing machine which is excellent in workability and visibility even when used as a general sewing machine and which has increased versatility.

If the edge detecting device can be retracted, even if an inexpensive contact type sensor is used for the edge detecting device,
When used as a general sewing machine, it is possible to provide an edge control sewing machine with improved workability and visibility and increased versatility.

In an edge control sewing machine according to a second aspect of the present invention, in a post type sewing machine having a post-shaped member for accommodating a shuttle mechanism or the like on a sewing machine bed, at least one of an end detecting device and a work transfer device is used as a sewing object. It is possible to evacuate to a position that does not interfere,
Since the vicinity of the stitch forming position is not flat and it is difficult to use a non-contact type sensor such as an optical sensor for the edge detection device, even in a post type sewing machine that uses a contact type sensor, when using it as a general sewing machine It is possible to provide an edge control sewing machine with good workability and visibility and increased versatility.

In the edge control sewing machine according to a third aspect, in the edge control sewing machine according to the second aspect, it is possible to retract the end detecting device to a position where it does not interfere with the material to be sewn. Since it can also be retracted together with the cover, it is possible to shift from the state in which the end detection device is set to the state in which the hook cover is removed in one operation, and the end detection device and the hook cover can be moved in one operation. Can be returned to the set state. Therefore,
In addition to the action of the edge control sewing machine according to the second aspect, it is possible to provide an edge control sewing machine with greatly improved workability such as bobbin thread replacement.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an edge control sewing machine according to the present invention will be described below with reference to the drawings.

Although there are various types of edge control sewing machines, in the present embodiment, a description will be given of the case of a post type thick edge control sewing machine for sewing leather products and particularly used for lining leather shoes. Will be done.

1 to 8 are views showing an edge control sewing machine of this embodiment, FIG. 1 is a front view showing the construction of a work transfer device and a post portion, and FIG. 2 is a view of the work transfer device and a post portion. FIG. 3 is an external perspective view showing the front view of FIG.
4 is an enlarged view showing a method for retracting only the edge detecting device, FIG. 5 is a front view showing a state in which only the edge detecting device is retracted, and FIG. 6 is an edge detecting device for the edge control sewing machine of this embodiment. FIG. 7 is a front view showing a case where the work transfer device is retracted and used as a general sewing machine, FIG. 7 is an external perspective view showing the shape of the end detection plate in the edge control sewing machine of this embodiment, and FIG. 8 is the end detection plate. FIG. 3 is an external perspective view showing the positional relationship between the sewing machine and the sewing target. 1 and 3 show the outer shapes of the stand, arm and head of the sewing machine.

Edge control sewing machine 10 of this embodiment
0 is a post-type sewing machine including a post 15 (post-shaped member) for accommodating a shuttle mechanism or the like on the sewing machine bed 19.
An end detection device 100a provided on the post 15 for detecting the end position of the sewn object and a work transfer device 100b for position control and transfer of the sewn object are provided.

First, the structure around the edge detecting device 100a will be described.

The edge detecting device 100a includes a detecting plate 5,
The potentiometer 4, the arm 4 a, the potentiometer mount 2, and the plunger 10 are provided, and the potentiometer 4 and the plunger 10 are mounted on the potentiometer mount 2. To detect the position of the end of the sewing object, the position of the detection plate 5 in contact with the sewing object is detected by the arm 4
The detection is performed by the potentiometer 4 via a.

Reference numeral 1 is a hook cover, and 3 is a fixed plate. The hook cover 1, the fixing plate 3, and the potentiometer mount 2 are mounted on a post 15 so as to be rotatable about a shaft 6. Further, the post 15 is provided with a pin 9 protruding therefrom, and the fixed plate 3 is provided with a groove 3a at an end thereof.
The groove 3a is fitted and locked with the pin 9 to the extent that the fixed plate 3 rotates counterclockwise around the shaft 6 in the figure.

Holes 7 and 8 are provided on the fixed plate 3 on the same circumference centering on the shaft 6, and the potentiometer mount 2 is provided with holes 16 on the same circumference. , Fix this hole 16 according to the position of hole 7
The potentiometer mount 2 can take two relative positions with respect to the fixed plate 3 depending on whether the fixed plate 3 is fixed according to the position.

Reference numeral 10 denotes a plunger, which is composed of a main body having a threaded portion and a sliding body slidably supported by the main body and biased downward by a spring. The sliding body has an operation knob at one end and a positioning pin 10a at the other end.

Further, an elongated hole 17 into which the positioning pin 10a at the tip of the plunger 10 is fitted is provided in the upper portion of the shuttle cover 1, and by moving the plunger 10 up and down, the positioning pin 10a and the positioning pin 10a are extended. The holes 17 are engaged and disengaged. Then, when the positioning pin 10a and the elongated hole 17 are fitted together, the hook cover 1 and the potentiometer mount 2 are integrated and rotated around the shaft 6.

Next, the structure of the work transfer device 100b will be described.

The work transfer device 100b has a mounting screw 14
It is fixed to the mounting base 13 by means of, and is detachable from the mounting base 13 by means of mounting screws 14. The electrical connection between the work transfer device 100b and the mounting base 13 is, for example, a cartridge type, and the connection is made with one touch when attaching and detaching. The work transfer device 100b includes a feed roller 1
1 and a presser roller 12, and a feed roller 1
The object to be sewn is sandwiched between 1 and the pressing roller 12, and the position of the object to be sewn is controlled and conveyed by the controller (not shown) based on the detection of the end position of the end detecting device 100a. The position control and conveyance of the sewn object are performed by conveying the sewn object by the feed dog 18 above the post 15 and the feed roller 11 and the pressing roller 12 shown in FIG.
It is carried out by the differential transfer with the transfer by. In addition, as shown in the shape of the mounting base 13, two mounting positions of the work transfer device 100b can be selected.

The edge control sewing machine shown in this embodiment is an edge control sewing machine for thick materials, which is used to sew leather shoes together. The detection plate 5 is shown in FIGS. 7 and 8 for the purpose of detecting the end portion of the lower sewn object without interfering with the upper sewn object when sewn with leather for the side of leather shoes, which is a sewn item. As described above, at the tip of the horizontal portion 5c, a separating portion 5b for separating upper and lower sewn objects is provided.
And a detecting portion 5a which is bent from the horizontal portion 5c into an L shape and comes into contact with the end portion of the lower sewing material. As a result, the upper and lower sewn objects are separated by the separating portion 5b, and the end position of the lower sewn object is detected without interfering with the upper sewn object.

Hereinafter, when the edge control sewing machine of this embodiment is used as an edge control sewing machine while using the edge detection device 100a (A), and the edge detection device 100a and the work transfer device 100b are evacuated, The case (B) used as a sewing machine will be described.

(A). When using the edge detecting device 100a as an edge control sewing machine, as shown in FIGS. 1 and 2, in a state where the groove 3a of the fixing plate 3 is fitted and locked in the pin 9 of the post 15, and the potentiometer is attached. With the hole 16 of the base 2 aligned with the hole 7 of the fixing plate 3 and fixed by a pin (not shown), the plunger 10 attached to the potentiometer mount 2
With the work transfer device 100b attached to the mounting base 13 and fixed with the mounting screw 14, the workpiece is sandwiched between the feed roller 11 and the press roller 12, The detection plate 5 is brought into contact with the end of the article to be sewn, and the article to be sewn is transported while being sewn.

When the hook cover 1 is removed by replacing the bobbin thread, the hook cover 1, the potentiometer mount 2 and the fixing plate 3 are integrated from the center of the shaft 6 as described above. Hold and move in the direction of the arrow in the figure. Then, the groove 3a of the fixed plate 3 is released from the lock with the pin 9, and as shown in FIG. 3, the hook cover 1, the potentiometer mount 2 and the fixed plate 3 are rotated around the shaft 6 as they are and retracted downward. To do.

As described above, the hook cover 1 can be removed by one operation from the state in which the end detecting device 100a is installed.

When the bobbin thread is replaced and returned to the original state, the plunger 10 is held and rotated in the direction opposite to the arrow to return it to the original position. Then, the groove 3a of the fixed plate 3 is held.
Is locked to the pin 9 and returns to the original state in one operation.

When only the end detecting device 100a is retracted without removing the hook cover 1, as shown in FIG. 4, the handle of the plunger 10 is pulled upward and then rotated in the direction of the arrow. As shown in FIG. 5, only the edge detection device 100a can be retracted. In this case, since the positioning pin 10a at the tip of the plunger 10 is retracted to cancel the unification of the hook cover 1 and the potentiometer mount 2, only the potentiometer mount 2 and the fixing plate 3 are left as they are. Retract downwards about the shaft 6.

(B). When the end detection device 100a and the work transfer device 100b are used as a general sewing machine without using the end detection device 100a, the end detection device 100a is shown in FIGS. In the state where the groove 3a of the fixing plate 3 is fitted and locked in the pin 9 of the post 15, the handle of the plunger 10 is pulled and then rotated in the direction of the arrow so that the hole 16 of the potentiometer mount 2 is fixed to the fixing plate 3. The work transfer device 100b is removed from the mounting base 13 by loosening the mounting screw 14 in accordance with the hole 8 of FIG. In this way, as shown in FIG. 6, the sewing machine can be used as a general sewing machine with the end detection device 100a and the work transfer device 100b removed from the vicinity of the stitch forming position.

As described above, in the edge control sewing machine of this embodiment, when the edge control sewing machine is used as a general sewing machine which does not require the end portion detection and position control of the workpiece,
It is possible to use the edge control sewing machine with increased versatility by retracting the edge detection device and the work transfer device to a position where they do not interfere with the material to be sewn, and maintaining good workability and visibility. .

Further, in the present embodiment, in the post type sewing machine in which it is difficult to use a non-contact type sensor such as an optical sensor for the end detecting device because the vicinity of the stitch forming position is not a flat surface, the above effect is obtained. Can be obtained, and the cost of the sensor can be kept low.

Further, it is possible to shift from the state in which the end portion detecting device is set to the state in which the hook cover is removed in one operation.
The edge detection device and the hook cover can be returned to the set state by operation, and the edge control sewing machine has greatly improved workability such as bobbin thread replacement.

Further, in the detection plate 5, the separating portion 5b prevents the lower sewn object from rising and separates the upper and lower sewn objects from each other, so that the end position of the lower sewn object becomes the upper sewn object in the detecting section 5a. Since it is detected accurately without interference,
Accurate position control and sewing are performed. In this embodiment, the detection plate 5 attached to the edge detection device can also be retracted by removing it, but also in the case of an edge control sewing machine in which the edge detection device and the detection plate 5 are fixed at predetermined positions. If the structure of the detection plate is the same as that of the detection plate 5, as described in the embodiment, the end position of the lower sewn object is accurately detected without interfering with the upper sewn object, Accurate position control and sewing are performed.

Further, the detecting plate 5 of this embodiment is constituted by including the detecting portion 5a and the separating portion 5b, but instead of this, 2
It is easily conceivable to stack the plates on top of each other and fix the upper part to the separating plate and the lower part to the detecting part with a detecting plate shorter than the separating plate.

Further, in the present embodiment, the end detecting device can be moved to the retracted position. However, when sewing using the end detecting device, the end detecting device has the plunger 10 and the pin near the stitch forming position. Since it is held by pins 9 and holes 7 which match the holes 7, the cloth end of the sewing object can be accurately detected without being affected by vibration during sewing.

In this embodiment, an example of an edge control sewing machine using a potentiometer for the edge detecting device is shown, but the present invention is also applied to an edge control sewing machine using another sensor for the edge detecting device. Needless to say, for example, even if a non-contact type sensor such as an optical sensor is used, the present invention is included as long as it achieves the above object.

Further, in the present embodiment, the differential conveyance of the edge control sewing machine is carried out by the upper and lower rollers, but instead of this, the edge position of the sewn product described in Japanese Patent Application No. 6-268268 is used. It is easily possible to replace it with the upper and lower manipulators to be controlled.

Further, in the present embodiment, the case of a post type edge control sewing machine for thick material used for lining leather products, particularly leather shoes, has been described, but the present invention is applicable to any sewing machine type. Needless to say, it is applied.

Further, the edge detecting device 10 in the present embodiment.
It is needless to say that the details of the structure of 0a and the work transfer device 100b are merely examples. For example, in this embodiment, the potentiometer mount 2
Although the fixing plate 3 and the fixing plate 3 are separate components, various modifications can be considered such that the fixing plate 3 and the fixing plate 3 are combined into one component. Further, the electric connection between the work transfer device and the mounting base does not necessarily need to be attached / detached with a single touch of the cartridge.

Further, in this embodiment, an example has been shown in which both the end detecting device and the work transfer device are retractable, but either the end detecting device or the work transfer device can be retracted. May be.

[0047]

According to the edge control sewing machine of the first aspect, it is possible to provide an edge control sewing machine which has good workability and visibility even when used as a general sewing machine, and which has increased versatility.

If the edge detecting device can be retracted, even if an inexpensive contact sensor is used for the edge detecting device,
When used as a general sewing machine, it is possible to provide an edge control sewing machine with improved workability and visibility and increased versatility.

In the edge control sewing machine according to the second aspect, it is difficult to use a non-contact type sensor such as an optical sensor for the edge detecting device, and a post type sewing machine using a contact type sensor is also a general sewing machine. An edge control sewing machine with good workability and visibility and increased versatility during use can be obtained.

In the edge control sewing machine according to the third aspect of the invention, the state in which the end detecting device is set can be changed to the state in which the hook cover is removed in one operation, and
The end detection device and the shuttle cover can be returned to the set state by the operation. Therefore, in addition to the effect of the edge control sewing machine according to the second aspect, it is possible to provide an edge control sewing machine with greatly improved workability such as bobbin thread replacement.

[Brief description of drawings]

FIG. 1 is a front view showing a configuration of a work transfer device and a post portion of an edge control sewing machine of this embodiment.

FIG. 2 is an external perspective view showing a configuration of a work transfer device and a post portion of the edge control sewing machine of the present embodiment.

FIG. 3 is a front view of the edge control sewing machine according to the present embodiment, showing a state in which a shuttle cover is integrally removed with an end detection device.

FIG. 4 is an enlarged view showing a method of retracting only the edge detection device in the edge control sewing machine of this embodiment.

FIG. 5 is a front view showing a state in which only the edge detection device is retracted in the edge control sewing machine of the present embodiment.

FIG. 6 is a front view showing a case where the edge detection device and the work transfer device are retracted and used as a general sewing machine in the edge control sewing machine of the present embodiment.

FIG. 7 is an external perspective view showing the shape of an edge detection plate in the edge control sewing machine of this embodiment.

FIG. 8 is a diagram showing the positional relationship between the end detection plate and the workpiece in the edge control sewing machine of this embodiment.

FIG. 9 is an enlarged view showing an example of a configuration around a sewing position of a conventional edge control sewing machine.

[Explanation of symbols]

 100 edge control sewing machine 100a edge detection device 100b work transfer device 1 hook cover 15 post 19 sewing machine bed

Claims (3)

[Claims] 1. An end detection device for detecting an end position of a sewn object, and a work transfer device for position control and transfer of the sewn product based on the end position detection of the end detection device. An edge control sewing machine comprising: an edge control sewing machine, wherein at least one of the end portion detection device and the work transfer device is retractable to a position where it does not interfere with a sewing object. 2. The edge control sewing machine according to claim 1, wherein the edge control sewing machine is a post type sewing machine including a post-shaped member for accommodating a shuttle mechanism or the like on a sewing machine bed. 3. The post-shaped member comprises the end detecting device and a shuttle cover, and the post detecting member has a structure capable of retreating to a position where the end detecting device does not interfere with a material to be sewn. The edge control sewing machine according to claim 2, wherein the edge control sewing machine has a structure capable of being retracted integrally with the hook cover.