JP2582024B2 - Hemming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an edge sewing device used to prevent fraying of a long cloth by sewing both edges thereof with a sewing machine.

[0002]

2. Description of the Related Art In recent years, when one piece of cloth product such as a towel or a blanket is manufactured, for example, a very long long cloth as a raw material is continuously processed. Prior to this processing, edge stitching of a woven long cloth is performed. This edge stitching (also called overlocking) is performed with only thread,
Or it may be performed by sewing another edge cloth, but in any case, it is to prevent the warp etc. from fraying on both edges of the long cloth, and this continuous cloth This is absolutely necessary as a pre-process for processing by various machines.

In order to continuously perform the edge sewing of the long cloth, the edge of the long cloth must be inserted at a correct position with respect to the sewing machine for performing the sewing operation. However,
Since the long cloth is very flexible, it is easy to meander with respect to the sewing machine, and it is not so easy to return the meandering material to the correct position with respect to the sewing machine. For this reason, for example, Japanese Patent Publication No. 57-17554
Gazette, Japanese Patent Publication No. 59-4155 or Japanese Patent Publication Sho 6
As proposed in Japanese Patent Application Laid-Open No. 2-19878 and the like, a sewing machine that performs edge stitching can be freely moved in a direction substantially orthogonal to the transport direction of a long cloth, and a detection that detects the meandering of the long cloth. It has been practiced to move the sewing machine in response to a signal from the device.

However, in order to move the sewing machine in accordance with the meandering state of the long cloth, a moving mechanism for the sewing machine is required as a matter of course. It is complicated. In addition, moving the sewing machine according to the amount of meandering of the long cloth means that the position of the meandering long cloth is actively corrected.
In other words, since the long cloth cannot be positively returned to the correct position, the movable range of the sewing machine must be increased, and the structure is further complicated.

Therefore, the inventor of the present invention has made it possible to easily prevent meandering of a long cloth, and to actively correct the meandering on the flexible long cloth side. As a result of various studies on what to do,
The present invention has been completed.

[0006]

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above circumstances, and the problem to be solved is to prevent meandering during the transport of a long cloth.

An object of the present invention is to make it possible to easily detect the meandering state of a long cloth by effectively utilizing the gravity exerted on a tension roller which is normally arranged horizontally. An object of the present invention is to provide an edge sewing device that can correct the position of a flexible long cloth itself in response to detection and prevent meandering with a simple configuration.

[0008]

Means for Solving the Problems To solve the above problems, the means adopted by the present invention will be described with reference numerals used in the embodiments. Meanwhile, in the edging device 100 in which both edges are sewn by the pair of sewing machines 20, at least one drive roller 30 and at least one detection device 40 are arranged on the upstream or downstream side of the sewing machine 20. At the same time, the driving roller 30 is rotated by one rotating shaft 3
1, a roller wheel 33 rotatably disposed on the rotating shaft 31 and divided into a pair of right and left members, and a pair of clutches 34 and 34 for selectively connecting the roller wheels 33 and the rotating shaft 31 respectively. 34, and the detection device 40
Both ends are guided by the left and right guide frames 15 provided in the edging device 100 so as to be free-fallable, and one of the ones stored in a substantially horizontal state in the bag Wa of the long cloth W in the middle of conveyance. A tension roller 41, first and second limit switches 42a and 42b disposed on both sides of the tension roller 41 to detect movement of both ends thereof, and signals from the first or second limit switches 42a and 42b. The control device 44 controls the operation of the clutch 34 on the side of the sewing machine 20 and the drive roller 30 in accordance with the above. , The sewing machine 20 and the driving roller 30 stop or slow one feed of the long cloth W.

That is, the edging device 100 according to the present invention.
Stores the tension roller 41 that can freely fall in the bag Wa of the long cloth W in the middle of conveyance, and when the bottom of the bag Wa is inclined by the meandering of the long cloth W, this inclination Of the first limit switch 42a or the second limit switch 42 disposed on both sides of the tension roller 41.
b, and each sewing machine 20
By stopping or delaying the driving of one of the two divided roller wheels 33, the meandering state of the long cloth W itself is corrected.

[0010]

Next, the operation of the edging device 100 according to the present invention configured as described above will be described according to the movement of the long cloth W which is continuously conveyed. The detecting device 40 detects the meandering of the long cloth W, and the sewing machine 20 and the driving roller 30 that are driven and controlled by signals from the detecting device 40.
Can be provided in various places of the edging device 100 as described later. In the following description, the detection device 40 is located immediately downstream of the sewing machine 20.
The description will be made in accordance with the embodiment shown in FIG. 1 in which the drive roller 30 is disposed immediately before the upstream side of the sewing machine 20.

In the edge sewing device 100 shown in FIGS. 1 and 2, a long cloth W which is a material to be edge-sewn is arranged on the left side of the first column 11 shown on the left side of the figure. The long cloth W is continuously conveyed to the right side in the figure by the driving roller 30 or the like, and the long cloth W after the completion of the edge stitching is stored on the right side of the second support 12 shown on the right side in the figure. It was done. It should be noted that the long cloth W first carried in may be in a folded state or a roll-wound state. Therefore, in FIG. 1, both of them are indicated by phantom lines.

The loaded long cloth W must be set in the edging device 100, which is performed as follows. First, the leading edge of the long cloth W is applied to the second driving roller 50 on the first support 11, and this is applied to the first support 11.
Is once dropped on the first support 11, and then passed under the worktable 14 arranged at the center of the edging device 100. Then, after setting the leading edge of the long cloth W to the drive roller 30 provided on the second support 12, the pair of sewing machines 20 located at the next stage are set so that the edge sewing can be performed. Thereafter, the tip edge of the long cloth W is moved up and down along the second support column 12 to form a bag Wa, and the tension roller 41 constituting the detection device 40 is stored in the bottom of the bag Wa. Finally, the leading edge of the long cloth W is passed through the swing arm 13 and then moved to the right side of the second support 12 in the drawing.

The long cloth W set as described above is sequentially and continuously conveyed from the left side to the right side in FIG. 1 by each driving unit of the edging device 100. In the embodiment, the conveyance force is the first support 11
A second driving roller 50 disposed above, a driving roller 30 disposed on the second support 12, each sewing machine 20 located immediately after the driving roller 30, and a belt conveyor disposed between the sewing machine 20 and the detection device 40. 70 and swing arm 1
3 is provided by a delivery roll 13a provided at the upper end of the roller 3. The upper surface of the belt conveyor 70 is
The inclined cloth faces the worker standing on the work table 14 so that the state of the long cloth W conveyed on the belt conveyor 70 can be easily seen by the worker.

Now, the drive roller 30 provided on the second support column 12 has a chain 32a as shown in FIGS.
The rotational force of one rotating shaft 31 driven to rotate by
The transmission is transmitted to the left and right divided roller wheels 33 via each clutch 34, and each clutch 34 is configured to interlock with each sewing machine 20. That is, each clutch 34 is in the connected state when the long cloth W is not meandering, and rotates each roller wheel 33 together with the rotating shaft 31. As shown in FIG. As described above, the long cloth W hung on the outer peripheral surface of each roller wheel 33 is conveyed by the width thereof.

On the other hand, when the long cloth W starts to meander for some reason, this is detected by a detection device 40 described later, so that the rotation of one of the pair of left and right roller wheels 33 is prevented. It is stopped or slowed down. In other words, when the long cloth W starts to meander, one of the two edges of the long cloth W advances faster than the other. However, the operation of the sewing machine 20 on the side which has started to advance faster is stopped or reduced in speed. At the same time, the connection is disconnected at the clutch 34 and the corresponding roller wheel 33
Is in a free state. As a result, the other side of the delayed long cloth W is sent forward by the roller wheel 33 rotating together with the operating sewing machine 20 and the rotating shaft 31, and the meandering state of the long cloth W is correct. It will be corrected. When the transport of the long cloth W returns to the correct state, the sewing machines 20 and the clutch 34 are controlled by the detection device 40, and both the sewing machines 20 are in the normal operation state, and both the roller wheels 33 are normally moved together with the rotating shaft 31 again. It returns to the rotating state.

The detecting device 40 for controlling the above operation of the driving roller 30 performs the following operation, which will be described with reference to FIG. First, when the long cloth W is conveyed in a normal state without meandering, the bottom of the bag Wa formed in the portion where the detection device 40 is arranged is substantially as shown in FIG. It is horizontal. Therefore, the tension roller 41 housed in the bag Wa is in a horizontal state due to its own weight, and the first limit switch 42a and the second limit switch 42b disposed at both ends thereof generate any signal. It does not emit.

Here, when the long cloth W starts to meander, one of the bag portions Wa of the long cloth W is lifted and inclined relatively to the other. This is because one of the long cloths W advances quickly. As a result, one of the tension rollers 41 housed in the bag portion Wa so as to be free-fallable is also lifted, and one of the first limit switch 42a is operated, for example, and the first limit switch 42a is operated. Is transmitted from the control device 44 to the corresponding sewing machine 20 and the corresponding clutch 34, the sewing machine 20 is stopped or reduced in speed, and the connection state of the clutch 34 is cut off. Thus, when the meandering of the long cloth W is corrected, the bag Wa of the long cloth W returns to the horizontal state, and the tension roller 41 is set to the first limit switch 42.
It returns to the original horizontal state while activating a. By the operation of the first limit switch 42a by the tension roller 41 at this time, the corresponding sewing machine 20 is operated and the clutch 34 is again connected, so that the stable transport of the long cloth W is resumed.

In the control device 44 constituting the detection device 40 of the present embodiment, the first limit switch 4
When the signals from the 2a and the second limit switches 42b are input simultaneously or at extremely short time intervals, the operation state of each clutch 34 is programmed not to change. Both limit switches 42a
The fact that the signal from 42b is input simultaneously or at a very short time interval means that the tension roller 41 is kept horizontal, that is, the tension is not applied while the long cloth W is not meandering. This is because the up and down operation of the roller 41 is performed.
In this embodiment, as shown in FIG. 1, upper and lower limit switches 43 are disposed at the upper and lower ends of the range in which the tension roller 41 can move up and down. The speed of the delivery roll 13a provided on the downstream side of the detection device 40 is adjusted in accordance with the signal. When the tension roller 41 rises or falls extremely, it means that the feeding of the long cloth W is too early or too late for the conveyance. Therefore, when the tension roller 41 rises, that is, when the long cloth W If the feeding is too early, the feeding roll 13a is stopped or reduced in speed, and conversely, when the tension roller 41 is lowered, the operation of the feeding roll 13a is reversed.

In the edge sewing device 100 shown in FIGS. 1 and 6, the second driving roller 50 and the second detection device 60 are provided on the first support 11 side which does not support the sewing machine 20. The second drive roller 50 performs the same operation as the drive roller 30 described above, and the second detection device 60 performs the same operation as the detection device 40. The second drive roller 50 and the second detection device 60 The meandering of the long cloth W on the one support 11 side is corrected. These second drive roller 50 and second detection device 6
0 does not have a positive meaning that the long cloth W is loaded into the sewing machine 20 in a correct state, but plays a role in stabilizing the flow of the long cloth W in the edging device 100. Is what it is.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view of a hemming device according to a first embodiment of the present invention; FIG. In this edging device 100, a first support 11 and a second support 12 are respectively erected on both left and right sides of a base 10, and the first support 11 is folded or wound on the left side in the drawing. The long cloth W before the sewing is arranged, and the long cloth W after the edge stitching is laid out on the right side of the second support 12. That is, in the edging apparatus 100, the long cloth W is sequentially conveyed from the left side to the right side in the drawing, and is configured to pass under the work table 14 provided substantially at the center of the base 10. And the long cloth W on which the worker is
The flow and the state of the system can be checked.

A second drive roller 50 having substantially the same configuration as a drive roller 30 described later is provided on the first support 11, and a detection device 4 described later is provided on a side surface of the first support 11.
A second detecting device 60 similar to that shown in FIG. 0 is provided.
The upper sewing machine 20 can be stably transported.
On the first support 11 side, in order to allow a worker standing on the work table 14 to check the state of the long cloth W before hemming being conveyed in a wide area, a long sheet in the middle of conveyance is used. The cloth W flows on the right side of the first support 11 in the drawing.

As shown in FIGS. 1 and 2, a pair of sewing machines 20 which are located on the left and right sides of the long cloth W to be conveyed are installed on the second support 12, In the present embodiment, a drive roller 30 is disposed near the upstream side of the sewing machine 20. In the vicinity of the AC side of each sewing machine 20, the state of the long cloth W after the edge stitching is displayed on the work table 1.
A belt conveyer 70 is provided for the operator on the upper side 4 to be easily seen, and a detection device 40 is disposed below the belt conveyer 70 and on the right side of the second support 12 in the drawing. Further, the long cloth W passing through the detecting device 40
Is a delivery roll 13a provided at the upper end of the second support 12
From the swing arm 13 that swings below the delivery roll 13a, and can be stored while being folded below the swing arm 13.

In each of the sewing machines 20 in this embodiment, as shown in FIG. 2, inclined rollers 21 which come into contact with the upper surface of the transported long cloth W are respectively attached. Is slightly inclined from the direction perpendicular to the traveling direction of the long cloth W.
Although each of these inclined rollers 21 does not actively send out the long cloth W, the long roller W is in contact with the surface of the long cloth W being conveyed in a state where its axis is inclined. The function is such that the edge of the shaku cloth W is always pushed toward the corresponding sewing machine 20 side.

The drive roller 30 is, as shown in FIG.
A roller shaft 33 divided into two is rotatably mounted on a single rotating shaft 31 via a bearing 33a, and the rotating shaft 31 has a sprocket 32 fixed at the center thereof.
Is rotated at a constant speed by a chain 32a mounted on the vehicle. The two ends of the rotating shaft 31 are intermittently connected to each of the roller wheels 33 or the roller wheels 3 with respect to the rotating shaft 31.
The clutches 34 (which are electromagnetic clutches or brakes in the present embodiment) for reducing the speed of the motor 3 are provided, and these clutches 34 are interlocked with the corresponding sewing machines 20. Each of these clutches 3
4 is fixed to the base 10 side of the edge sewing device 100, and the driven plate 34c side of each clutch 34 is fixed to each roller wheel 33 side. These clutches 34
As shown in FIG. 3, a clutch plate 34b is disposed between the main body 34a and the driven plate 34c. When the clutch plate 34b is connected to the driven plate 34c, it is connected to a spline on the rotating shaft 31. When the clutch plate 34b is connected to the main body 34a by the operation of the main body 34a, the coupling with the driven plate 34c is released and the roller wheel 33 is free to rotate on the rotary shaft 31. (In other words, only the rotation shaft 31 is rotated).

Therefore, when the long cloth W is wound around the upper surface of each roller wheel 33 of the drive roller 30 as shown in FIG. 4, the long cloth W rotates with the rotating shaft 31. The roller wheel 33 is sent out by the operation of the roller wheel 33 and the sewing machine 20. When one of the clutches 34 operates to disconnect the rotation shaft 31 and the roller wheel 33, the rotation of the roller wheel 33 is free by the clutch 34. That is, the long cloth W is conveyed by the roller wheel 33 on the side that is not stopped or decelerated while applying a so-called partial force. As a result, if the long cloth W has a meandering state, the correction is performed. If the meandering correction of the long cloth W is performed, the two sewing machines 20 and the roller wheel 33 are again returned to normal by the next detection device 40. It enters the drive rotation state.

As shown in FIGS. 1 and 5, the detecting device 40 includes a tension roller 41 housed in the bag Wa of the long cloth W in a substantially horizontal state, and is disposed at both ends of the tension roller 41. And a pair of left and right first limit switches 42a and 42b for detecting up and down movement within the specified range.
And a control device 44 that controls the operation of each clutch 34 according to a signal from the second limit switch 42b and the like. Of course, both ends of the tension roller 41 are guided by the respective guide frames 15 constituting the base 10 of the edging device 100 as shown in FIG. Moves up and down according to the difference between its own weight and the force applied from the bag portion Wa of the long cloth W.

That is, in the edge sewing device 100, the bag portion Wa is positively formed by hanging a part of the long cloth W on the right side of the second support 12 shown in FIG. In addition, the detection device 40 is configured by adopting a simple structure in which the tension roller 41 whose left and right ends are vertically movable is accommodated in the bag Wa. Therefore, if the long cloth W meanders, one of the bag portions Wa of the long cloth W will be displaced from the predetermined position, and this will be converted into the movement of the tension roller 41, and the converted tension will be described. The movement of the roller 41 operates the first limit switch 42a or the second limit switch 42b. The edge sewing device 100 includes upper and lower limit switches 43 for respectively controlling the rising end and the lowering end of the tension roller 41.
3 when a signal is input from any of
The speed of the delivery roll 13a provided on the downstream side is adjusted.

The second driving roller 50 and the second detecting device 60 having substantially the same configuration as the driving roller 30 and the detecting device 40 described above are used for the first support 11 of the edge sewing device 100.
It is also provided on the side. In the edging apparatus 100 according to the present embodiment, a wide portion of the long cloth W can be seen from the worker standing on the work table 14, and the transport path of the long cloth W is It is quite long. Therefore, it may not be sufficient to simply prevent and correct the long cloth W from meandering the sewing machine 20. Therefore, the second driving roller 50 and the second detection device 60 are also provided on the first support 11 side. The second driving roller 50 has substantially the same configuration as the driving roller 30, and the second detection device 60 has substantially the same configuration as the detection device 40, but a detailed description thereof will be omitted.

In the edging apparatus 100 obtained in the first embodiment shown in FIGS. 1 to 5, the detecting device 40 is disposed immediately to the right of the second support column 12 shown in the right side of FIG. Although the case is shown, the location of the detection device 40 may be as shown in FIG. 6 or FIG. That is, in the detection device 40 shown in FIG. 6, the confluence Wa of the long cloth W is formed on the back side of the swing arm 13 opposite to the outlet of the long cloth W, and Tension roller 4 with swing arm 13
1 is movably assembled, and the tension roller 41
The first limit switch 42a and the second limit switch 42b for detecting the movement of the swing arm 13 are provided on the swing arm 13 side. As a result, the entire detection device 40 can be compactly assembled and its maintenance can be easily performed.

On the other hand, in the embodiment shown in FIG. 7, between the second support 12 and the stand of the sewing machine 20 shown in the first embodiment of FIG. 1, that is, in FIG. The detection device 40 is arranged in the space between them. In this case, the detection device 40 is set closer to the sewing machine 20 and the operation range of the tension roller 41 is set to be short. Thereby, the meandering of the long cloth W with respect to the sewing machine 20 is detected at an early stage, and the detection is performed. The correction can be made within a short time.

It should be noted that any of the detecting devices 40 shown in FIG. 6 or FIG.
The right side surface of the sewn stitching device 100 itself is easily opened for maintenance, and the overall configuration is made compact.

As described in detail above, in the present invention,
The feature is that it is configured as exemplified in each of the above-described embodiments. This makes it possible to easily detect the meandering state of the long cloth by effectively utilizing the gravity applied to the tension roller that is normally arranged horizontally. In addition, it is possible to provide a sewn device that can correct the position of the flexible long cloth itself in accordance with the detection and prevent the meandering with a simple configuration.

That is, in the edging device 100 according to the present invention, the detection device 40 is mainly used as the tension roller 4.
1 and a first limit switch 42a for detecting the movement of the first limit switch 42a, and the driving roller 30 is constituted by a roller wheel 33 connected to one rotating shaft 31 via a clutch 34. 4
Since the clutch 34 is controlled by using a signal such as 2a, the meandering state of the long cloth W with respect to the rotating shaft 31 is detected in real time even if the overall configuration is very simple. The correction can be performed in a short time, and the edge sewing of the long cloth W can always be reliably performed. In particular, when the long cloth W is a literally long one of several tens of meters, and the conveying speed of the long cloth W is set to 20 m / min or more in order to increase the production efficiency, the edge sewing device 100 is very Can work effectively,
It is very useful in industry.

[Brief description of the drawings]

FIG. 1 is a side view of a hemming device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is a partially enlarged sectional view of a driving roller or a second driving roller.

FIG. 4 is a side view of a driving roller or a second driving roller.

FIG. 5 is a partial front view of the edging device showing the configuration of the detection device.

FIG. 6 is a side view of a hemming device according to another embodiment.

FIG. 7 is a partial side view of a hemming device according to still another embodiment.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 edging device 10 base 11 first support 12 second support 13 swing arm 14 work bench 15 guide frame 20 sewing machine 21 inclined roller 30 drive roller 31 rotating shaft 33 roller wheel 34 clutch 40 detector 41 tension roller 42a first limit Switch 42b Second limit switch 44 Controller 50 Second drive roller 60 Second detector 70 Belt conveyor

Claims (1)

(57) [Claims] 1. An edge stitching device in which both edges are stitched by a pair of sewing machines while continuously transporting a long cloth, wherein a drive roller and a detection device are provided upstream or downstream of the sewing machine. And at least one of each of the above, the drive roller, a single rotating shaft that is steadily rotated, a roller wheel that is rotatably disposed on the rotating shaft and divided into a pair of right and left, Each of the roller wheels and the rotating shaft is constituted by a pair of clutches which are selectively connected to each other, and the detection device is guided by the left and right guide frames provided on the edging device so that both ends can be freely dropped. A tension roller that is stored in a substantially horizontal state in the bag portion of the long cloth being transported, and a first tension roller that is disposed on both sides of the tension roller and detects movement of both ends thereof. And a second limit switch, and a control device that controls the operation of the clutch on the side of the sewing machine and the drive roller according to signals from the first or second limit switch, and both end edges of the long cloth. The edge stitching device according to claim 1, wherein when one of the long advance is advanced, the detection is detected by the detection device, and the feeding of one of the long cloths by the sewing machine and the driving roller is stopped or delayed.