JP3882095B2 - Edge sewing device for long fabric - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an edge stitching device used to perform edge stitching for preventing fraying or forming side hems on an edge of a long fabric.
[0002]
[Prior art]
For example, in the case of manufacturing towels, in order to finish towels, which are daily necessities, at low cost, the raw fabric is made continuously as a long fabric, but this towel is manufactured. for long fabric order to you, hemmed called Saidohemu is preformed. This side hem is formed by folding the edge of the fabric three times and sewing the three folded portions. Further, for example, for even a single fabric products such as sheets, the but raw of which are formed as elongated dough, also the edges of the elongated fabric unless subjected to hemmed for fraying prevention Don't be.
[0003]
As described above, the edge of the long fabric must be sewn. The reason for this is that this type of long fabric must be dyed or textured before it is made into products such as towels or sheets. This is because it is advantageous to carry out various pre-treatments such as a long fabric while preventing the edges from fraying. If the fabric is for towels, the side hem before the towel cross-hem is individually formed. It is because it is advantageous to form these continuously.
[0004]
In some cases, it is sufficient to perform edge sewing on a long fabric only for one edge, but it is generally performed for both edges at the same time. However, as for the edge sewing of the long fabric, if only one is considered, the other may be applied in the same manner. Therefore, in the following description, only one edge sewing will be referred to.
[0005]
As an apparatus for performing edge stitching for preventing fraying or forming side hems for the above-described long fabric, for example, an "automatic sewing apparatus for long objects" as proposed in Japanese Patent Publication No. 57-17554 is available. Are known. The “automatic sewing apparatus for long objects” disclosed in this publication is “an apparatus for sewing a long object such as a cloth while sewing the edges thereof, at an appropriate interval substantially perpendicular to the traveling direction. A pair of sewing machines are placed, and a male and female edge detectors are arranged in front of each sewing machine, and a sewing machine and an edge detector are provided on the moving table, and signals generated from the detectors. The sewing machine follows the meandering of the long object while displacing the movable table at right angles to the traveling direction based on the above. It has become.
[0006]
In general, in this type of “automatic sewing machine for long objects”, meandering of a long cloth must be detected before the long cloth enters the sewing machine. If the scale fabric is meandering, it must be corrected to the correct position, so the detector that detects meandering must be placed on the front side of the sewing machine (upstream of the machine). Don't be. The detector and the sewing machine have a certain size, and other processing devices may be arranged between them, and the distance between the detector and the sewing machine or other processing device is It cannot be zero.
[0007]
For this reason, if both a detector and a sewing machine are provided on one moving table as in the apparatus of the above publication, the edge of the long fabric that is still in the correct position on the sewing machine side is still If the long fabric on the side starts to meander and this is detected by the detector, the sewing machine will start sewing the edge at an incorrect position. The above-described misalignment of the edge stitch becomes more noticeable as the distance between the detector and the sewing machine increases. For example, a hem forming device or a trimming device is interposed between the sewing machine and the detector. In such a case, it becomes an even more serious problem.
[0008]
In particular, the problem that the support base of the detector that detects meandering also serves as that of the sewing machine becomes serious when the side hem of the towel is formed in advance in a long fabric. In other words, the side hem is formed by folding the plain weave portion located outside the pile portion and sewing the edge of the three-turn portion formed by the folding at a position as close as possible to the boundary with the pile portion. However, the normal width of the side hem itself is very narrow, about 3 to 10 mm. Accordingly, if the above-described misalignment occurs at the machining position by the sewing machine or the latest machining apparatus, the side hem is not completely formed and must be unsightly. That such incomplete Saidohe Munoa Ru long cloth is a defective product is, as a matter of course.
[0009]
Therefore, the present inventors have completed the present invention as a result of various studies on how to perform edge stitching without causing the above-described malfunction.
[0010]
[Problems to be solved by the invention]
The present invention has been made on the basis of the above-described circumstances, and the problem to be solved is to make it possible to correct the processing position of a sewing machine or the like that performs edge sewing in accordance with the flow of a long fabric. It is possible to perform edge sewing at the correct position.
[0011]
That is, an object of the present invention is to perform edge sewing at the correct position by following the sewing machine or the longest fabric of the processing apparatus at the forefront with a slight shift from the meandering detection by the detection device. An object of the present invention is to provide an edge stitching device having a simple structure.
[0012]
[Means to solve the problem]
In order to solve the above problems, means taken by the present invention will be described with reference numerals used in the description of the embodiments described later.
“In order to perform edge stitching for preventing fraying or forming side hems on at least one edge of the long fabric W, a detection device 20 that detects the edge and a sewing machine 30 that performs edge stitching on the edge are provided. An edge stitching device comprising:
The sensing device 20, together with the assembled so as to move relative to the fabric guide shaft 11 for feeding the elongated dough, the dough guide shaft 11 while following the edge of the detection portion 21 is elongated dough W of the detection device 20 To move up ,
The sewing machine base 31 of the sewing machine 30 is configured separately from the support base 22 of the detection device 20, and moved according to the signal from the detection device 20,
When the serpentine elongated dough W that began to be detected by the detector 21 of the detecting device 20 has come to the needle position of the sewing machine 30, the sewing machine table 31, the hemmed by only moving the moving amount of the detecting device 20 Edge sewing device for long fabric W characterized by being made "
It is.
[0013]
That is, the important point of the edge sewing device 100 according to the present invention is that the support base 22 on the detection device 20 side and the sewing machine base 31 on the sewing machine 30 side are separately configured, and the detection device for meandering the long fabric W The sewing machine base 31 is made to follow the meandering of the long fabric W with a slight delay from the follow-up of 20. The delay to be given to the sewing machine base 31 is between the detection unit 21 in the detection device 20 and the processing device (the trimming device 50 in the following embodiment) located at the foremost position of the sewing machine 30 or on the sewing machine base 31. Is set in advance by the relationship between the distance and the conveyance speed of the long fabric W by the main feed roller 61, and is measured by means such as an encoder. As shown in FIG. 2, the main feed roller 61 is rotationally driven by a main feed motor 62 provided on the base frame 110 side.
[0014]
Therefore, according to the edge sewing device 100 according to the present invention, if meandering occurs in the long fabric W conveyed in the device, it is of course detected on the fabric guide shaft 11 by the detection device 20. Since the sewing machine base 31 follows the detected position when the detected position comes to the needle position of the sewing machine 30 or the latest processing apparatus, the edge sewing on the long fabric W or the pre-processing necessary for this edge sewing is performed. Is always performed in the correct position, and a beautiful edge stitch is formed.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
The present invention configured as described above will be described with reference to the edge sewing apparatus 100 according to the embodiment shown in the drawings. The description of the edge sewing apparatus 100 will be described in accordance with the movement of the long fabric W. It will be performed while tangling the movement of the member.
[0016]
Further, in the preceding stage of the following description, it is assumed that the three-winding device 40 and the trimming device 50 are not present between the detection unit 21 and the sewing machine 30, for example, when performing edge stitching of a sheet Is assumed. In the subsequent stage, the embodiment itself having the three-winding device 40 and the trimming device 50 will be described, and the case of forming a side hem that is edge stitching will be described for the long fabric W for forming a towel. Let's go.
[0017]
First, as shown in FIG. 1, a long fabric W that is not subjected to edge stitching is carried into the edge sewing device 100 by a carry-in device 10 on the right side of the drawing. While the meandering is detected by the detection device 20, it is sent to the next stage (the trimming device 50, the three winding device 40 and the sewing machine 30) and folded by the folding device 60. The conveyance of the long fabric W in the edge sewing device 100 is mainly performed by the main feed roller 61.
[0018]
The detection device 20 includes the support base 22 assembled to the detection guide shaft 23 and the detection-side drive shaft 24 arranged in parallel to the support guide 22 immediately after the material guide shaft 11. is there. That is, as shown in FIGS. 5 and 6, the detection device 20 connects the support base 22 to a detection-side drive shaft 24 that is rotationally driven by a drive motor 25 via a ball screw mechanism or the like. The detection-side drive shaft 24 is moved forward and backward with respect to the center in the axial direction of the material guide shaft 11 by forward or reverse rotation, and the guidance at this time is performed by the detection guide shaft 23.
[0019]
Of course, the detection device 20 is controlled to move the support base 22 following the long fabric W while detecting meandering of the long fabric W. In other words, the detection unit 21 always detects the edge line of the long fabric W or the boundary line with the pile part that is inside the predetermined dimension from now on, and when detecting that these lines have moved, The drive motor 25 is controlled to rotate the detection side drive shaft 24 by a predetermined amount.
[0020]
As described above, if the long fabric W meanders, the support base 22 is moved on the detection-side drive shaft 24 accordingly, and the detection unit 21 of the detection device 20 detects the edge of the long fabric W. Etc. are always detected. In addition, as a detection part 21, although conventionally well-known various things can be applied, for example, if an optical sensor is used, it will be effective.
[0021]
The sewing machine base 31 on the sewing machine 30 side is a separate body as shown in FIGS. 2 and 5 with respect to the support base 22 on the detection apparatus 20 side. The base frame 110 is assembled so as to be movable in a direction orthogonal to the direction in which the long fabric W is carried. That is, as shown in FIGS. 2 and 3, the sewing machine base 31 is mounted on the base frame 110 via the rollers 32, and, for example, a ball screw nut 33 a integrally provided on the lower surface thereof is mounted on the base frame 110. The sewing machine base drive shaft 33 provided on the frame 110 side is connected and assembled. The sewing machine base drive shaft 33 is rotated forward or reversely by the rotational drive of the moving motor 34 provided at the end thereof, so that the sewing machine base 31 is parallel to the detection side drive shaft 24 on the detection device 20 side. As shown, it is moved with respect to the base frame 110.
[0022]
What is important in the moving motor 34 on the sewing machine 30 side is that the drive control is performed in response to a signal from the detection unit 21 of the detection device 20, but a little later. That is, even if the meandering is detected by the detection unit 21 of the detection device 20 and the support base 22 starts to move, the sewing machine base 31 does not move immediately but starts to be detected by the detection unit 21 of the detection device 20. When the meandering portion of the long fabric W comes to the needle position of the sewing machine 30, the movement motor 34 is finally driven and the movement of the sewing machine base 31 starts.
[0023]
As described above, the movement of the sewing machine base 31 is delayed with respect to the movement of the support base 22 on the detection device 20 side. The edge sewing operation by the sewing machine 30 is detected by the detection unit 21 of the detection device 20. This is because it is not performed directly on the portion, but the portion to be sewed reaches the needle position of the sewing machine 30 with a slight delay after detection by the detection unit 21. Therefore, in the edge sewing device 100, the support base 22 of the detection device 20 and the sewing machine base 31 of the sewing machine 30 are separated and moved with a time difference.
[0024]
This time difference is the distance between the detection unit 21 in the detection device 20 and the needle position of the sewing machine 30 or the processing device (the trimming device 50 in the following embodiment) positioned in front of the sewing machine base 31 and the main feed roller. 61 is set in advance in relation to the conveyance speed of the long fabric W by 61, and is measured by means such as an encoder. The time difference can be easily set because the distance between the detection unit 21 and the needle position of the sewing machine 30 or the processing device positioned at the forefront on the sewing machine base 31 is fixed. Such a setting may be made in the circuit for driving the moving motor 34 in response to the above signal.
[0025]
As shown in FIG. 2, the sewing machine 30 of the present embodiment is driven by a drive motor 35 provided directly on the lower surface of the sewing machine base 31, and the drive motor 35 is a sewing machine base 31. The leading roller 12 provided on the upstream side of the sewing machine 30 is also driven to rotate.
[0026]
The above is a description assuming the case where the three-winding device 40 and the trimming device 50 are not provided between the detection device 20 and the sewing machine 30. However, when the side hem of the towel is formed by forming edge stitches. For this, a three-winding device 40 and a trimming device 50 described below must be provided in front of the sewing machine 30. The side hem must be formed by winding the edge of the long fabric W three times and performing edge stitching on the edge, and for example, as shown in FIG. This is because the left edge of the long fabric W must be trimmed.
[0027]
That is, the edge sewing apparatus 100 of the embodiment shown in the drawings is intended for a long fabric W for manufacturing a towel, and therefore, three for forming side hems on the edge of the long fabric W. A trimming device 50 that has a winding device 40 immediately before the sewing machine 30 and trims the edges of the long fabric W in order to completely perform the three-winding by the three-winding device 40. Is provided immediately before (upstream) the triple winding device 40. Therefore, in the edge sewing device 100, the length of the three-winding device 40 and the trimming device 50 is between the detection unit 21 of the detection device 20 and the needle position of the sewing machine 30 as shown in FIG. The distance of the minute is added, and the detection device 20 and the sewing machine 30 are considerably separated. In this case, the trimming device 50 is the foremost processing device described in claim 1. Yes.
[0028]
The above three winding device 40 and trimming device 50 are integrated on one auxiliary base 31a as shown in FIG. The auxiliary base 31a has a rear end integrated with the front end of the above-described sewing machine base 31, and the front end is separated from the support base 22 on the detection device 20 side as shown in FIGS. . Therefore, the auxiliary table 31a moves together with the sewing machine table 31, and is independent of the support table 22 on the detection device 20 side. The auxiliary base 31a has a detection guide that guides the detection device 20 at its front end via a bracket (not shown) in order to stabilize the support of the three-winding device 40 and the trimming device 50. It is assembled on the shaft 23.
[0029]
Therefore, in the edge sewing device 100 of the present embodiment, when the meandering of the long fabric W is detected by the detection unit 21 of the detection device 20, the entire detection device 20 moves following this and the sewing machine base 31. The moving motor 34 on the sewing machine base 31 side is driven so that the trimming apparatus 50, which is the uppermost apparatus on the upper side, starts processing the portion of the long fabric W that has started meandering.
[0030]
【The invention's effect】
As detailed above, in the present invention, as illustrated in the above embodiment,
“In order to perform edge stitching for preventing fraying or forming side hems on at least one edge of the long fabric W, a detection device 20 that detects the edge and a sewing machine 30 that performs edge stitching on the edge are provided. An edge stitching device comprising:
The sensing device 20, together with the assembled so as to move relative to the fabric guide shaft 11 for feeding the elongated dough, the dough guide shaft 11 while following the edge of the detection portion 21 is elongated dough W of the detection device 20 To move up ,
The sewing machine base 31 of the sewing machine 30 is configured separately from the support base 22 of the detection device 20, and moved according to the signal from the detection device 20,
When the serpentine elongated dough W that began to be detected by the detector 21 of the detecting device 20 has come to the needle position of the sewing machine 30, the sewing machine table 31, the hemmed by only moving the moving amount of the detecting device 20 What I did "
There is a feature in the structure, and this makes it possible to follow the long cloth of the sewing machine or the foremost processing device with a slight deviation from the meandering detection by the detection device, and to perform edge sewing etc. at the correct position The edge sewing device 100 can be provided with a simple configuration.
[Brief description of the drawings]
FIG. 1 is a side view of an edge sewing apparatus according to the present invention.
FIG. 2 is an enlarged side view of a main part of the edge sewing apparatus shown in FIG.
3 is a cross-sectional view taken along line 1-1 in FIG. 2 showing the relationship between the sewing machine and the sewing machine base in the same edge sewing device.
4 is a cross-sectional view taken along line 2-2 in FIG. 2 showing the relationship between the sewing machine base and the sewing machine base drive shaft.
5 is a partially enlarged view of a portion partitioned by line 3-3 in FIG. 2. FIG.
6 is a partial plan view taken along line 3-3 in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 100 Edge sewing device 110 Base frame 10 Carry-in device 11 Material guide shaft 12 Advance roller 20 Detection device 21 Detection part 22 Support base 23 Detection guide shaft 24 Detection side drive shaft 25 Drive motor 30 Sewing machine 31 Sewing base 31a Auxiliary base 32 Roller 33 Sewing machine drive shaft 33a Ball screw nut 34 Moving motor 35 Drive motor 40 Three-winding device 50 Trimming device 60 Folding device 61 Main feed roller 62 Main feed motor W Long fabric

Claims (1)

In order to perform edge sewing for preventing fraying or forming side hems on at least one edge of the long fabric, a detection device for detecting the edge and a sewing machine for performing edge sewing to the edge are provided. An edge sewing device,
The sensing device, with assembled so as to move relative to the fabric guide shaft for feeding elongated cloth, so as to move the cloth guide axial while following the edge of the detection portion is elongated dough of the sensing device And
The sewing machine base of the sewing machine is configured separately from the support base of the detection device, and moved according to a signal from the detection device,
When the serpentine elongated dough starts to be detected by the detection unit of the sensing device has come to the needle position of the sewing machine, the sewing machine table, to perform hemmed by movement amount is only moved in the sensing device Edge stitching device for long fabric W characterized by

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