JP3390634B2 - Half-folded annular fabric sensing device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensing device capable of easily sensing a bent portion or an opening of a half-folded annular cloth. 2. Description of the Related Art Conventionally, for example, when sewing a half-folded annular fabric with high elasticity to a waist portion of pants or the like, the annular fabric is manually supplied to a position below a presser foot of a sewing machine, and the annular fabric is provided. The outer edge of the tubular body at the waist was superimposed on the outer surface of the fabric and sewn. [0003] However, if the operation of confirming whether the double-folded portion of the half-folded annular fabric is supplied to the sewing machine in a normal state is neglected, that is, if the annular fabric is not properly folded. In the supply direction to the sewing machine side, when the double-folded portion of the annular fabric is supplied under the presser foot of the sewing machine, the outer surface (peripheral surface) of the folded portion of the fabric is provided with a waist tube. The edge of the body is superimposed and sewn, while the other end of the annular fabric is open because it is not sewn. Since it is not worthwhile, it is necessary to release the seam and re-sewing, resulting in a disadvantage that the working efficiency of sewing is reduced. In order to solve the above-mentioned problems, the present invention provides rollers 10, 11, 12, and 13 rotatable in a vertical plane at the front and rear positions of the sewing machine 1, respectively. A sliding piece 20 is provided so as to be able to reciprocate at the front or rear position of the sewing machine 1 and a pair of support shafts 28 and 28 and a photoelectric tube 30 including a projector 31 and a light receiver 32 are provided on the sliding piece 20 respectively. The rollers 10, 11, 1
After wrapping the half-folded annular fabric 50 on 2 and 13, respectively,
The sliding piece 20 is moved toward the fabric 50 side, and the support shafts 28, 28
An annular fabric 50 of the Han'orijo on locking, the supporting state, the to the site of the bent portion 51 or the opening 52 of the half-folded annular cloth 50 is sensed through the phototube 30 Bent portion of the half-folded annular fabric 50
51 is detected by the phototube 30, that is,
The amount of light received by the optical device 32 decreases and is less than a predetermined amount of light.
Is detected, the supply of the half-folded annular fabric 50 is
Assuming that the sliding operation was performed normally,
After returning from Y to the original position X, the half-folded annular
A tubular body cloth such as a waist portion on the surface of the opening 52 of the ground 50
The edge 61 of 60 is manually or automatically polymerized
Then, a means for starting the overlap sewing 65, and further, the half-folding
The opening 52 of the annular fabric 50 is positioned below the presser foot 3.
Is located at the opposite side of the phototube 30
If it is supplied in an abnormal state, that is, the half-folded annular
The opening 52 of the fabric 50 is sensed by the phototube 30,
The amount of light received by the light receiver 32 increases and is equal to or greater than a predetermined amount of light.
Is detected as abnormal,
Means for issuing an appropriate alarm and stopping the sewing operation.
As a result, in the feeding direction of the annular fabric 50, it is immediately detected whether or not the opening 52 on the edge side of the fabric 50 is positioned below the presser foot 3, thereby detecting the fabric edge. It is possible to superimpose and sew the opening 52 on the side of the body and the edge 61 of the tubular body such as the waist in a normal state, and to improve sewing efficiency and quality by eliminating sewing errors. It is done. An embodiment of the present invention will be described below with reference to the drawings. 1 is a sewing machine, 2 is a sewing needle, 3 is a presser foot, and 5 is a reflection type photoelectric tube provided on the sewing machine 1. Thus, the presence or absence of the annular fabric 50 is sensed. Reference numerals 10, 11, 12, and 13 denote rotatable rollers for mounting the annular fabric 50, respectively, and fixed rollers 14, 15 provided at front and rear positions of the sewing machine 1, respectively.
1, 12, and 13 are provided rotatably. In the illustrated example, four rollers 10, 11, 12, 1 and 4 are used as rotatable rollers for mounting the annular fabric 50.
Although three rollers are used, three rollers may of course be used. As shown in FIG. 3, the shape of each of the rollers 10, 11, 12, and 13 is such that the diameter at the center 16 of the roller is larger than the diameter at the side edges 17 and 18 of the roller. In addition, a flange 19 is provided on the side edge portion 17 side of the roller to prevent the fabric from coming off during sewing of the annular fabric 50. Reference numeral 20 denotes a sliding piece provided at a rear position of the sewing machine.
Reference numeral 22 is appropriately fixed by an air cylinder, and reference numeral 25 is appropriately provided so as to be slidable by a guide shaft. The sliding piece 2
At 0, the piston 23 of the air cylinder 22 and the guide shaft 25 are respectively fixed, and the sliding piece 20 reciprocates through the operation of the piston 23. Reference numerals 28, 28 denote a pair of support shafts,
0 and integrated and fixed, as described later.
0 is locked and supported to apply an appropriate tension. Further, after the annular fabric 50 is wrapped around the rollers 10, 11, 12, and 13 and is attached thereto, when the annular fabric 50 is locked and supported via the support shafts 28, 28, the fabric 50 is sewn on the sewing machine 1. In order to be located slightly above the surface 9, the support shafts 28, 28 are provided so as to be located above the sewing surface 9. Reference numeral 35 denotes a support plate fixed between the support shafts 28, 28, reference numeral 36 denotes a fixed piece fixed to the slide piece 20, and reference numeral 30 denotes a photoelectric tube provided in the vertical direction of the support plate 35, from the light emitter 31 and the light receiver 32. The light projector 31 is fixed to the support plate 35 and the light receiver 32 is fixed to the fixing piece 36. The support plate 35 may be directly fixed to the sliding piece 20 side, the position of the photoelectric tube 30 may be either the front position or the rear position of the sewing machine 1, and the projector 31 may be a table of the sewing machine 1. It may be embedded in the surface 9. Reference numeral 50 denotes a half-folded annular fabric (ring-like fabric) formed by a knitted fabric having a high elasticity. For example, a knitted tubular knitted fabric is formed by knitting a cotton yarn and a polyurethane elastic fiber, and then knitting the knitted fabric. The ground is cut at required lengths in the knitting direction, and the annular fabric cut to the required length is further folded halfway in the knitting direction along the circumferential direction, thereby being double-folded and half-folded. Thus, an annular dough 50 is obtained. In the half-folded annular fabric 50,
Reference numeral 51 denotes a half-folded bent portion, 52 denotes an opening on both edges of the fabric, and the fabric width W of the half-folded annular fabric 50 is 38 mm in the embodiment. , The cloth width W is set to about 20 to 100 mm. In the case where the annular fabric 50 is sewn to the waist of the pants or the like, for example, as shown in FIG. 6, the edge portion 6 of the tubular body fabric 60 such as the waist is formed on the outer surface of the opening 52 of the annular fabric 50.
1 is superimposed and sewing 65 is performed. Further, as shown in FIG. 5, in the half-folded annular fabric 50, the maximum thickness K of the fabric at the portion of the half-folded bent portion 51 is different from that of the other double fabric portions 53, 53, respectively. The fabric thicknesses J and J are thicker than the total thickness of 2J. Therefore, as shown in FIG. 8, when a bent portion 51 of a half-folded annular fabric 50 is sensed through the photoelectric tube 30, for example, the folded portion 51 of the fabric 50 is replaced with another double-folded portion. Since it is thicker than the fabric parts 53, 53,
The amount of received light decreases (decreases), and the sensing becomes dull. On the other hand, the fabric thickness (2J) at the double fabric portions 53, 53 is smaller than the fabric thickness (K) of the bent portion 51, and therefore, the light receiver 52 at the double fabric portions 53, 53 is used. Is naturally increased (increased). In FIG. 1, FIG. 2 and FIG. 7, the half-folded annular cloth 50 is rolled by a roller 10 via a clip (not shown) or the like which is manually or automatically operated in a normal state.
When attached to the side of the sewing machine 1, 12, and 13 and supplied to the position below the presser foot 3 of the sewing machine 1, the opening 52 of the annular fabric 50 is positioned below the sewing machine needle 2, that is, the presser foot 3.
Is located at the lower position. That is, in FIGS. 7 and 8, when the fabric end of the annular fabric 50 is sensed through the photoelectric tube 5 provided on the sewing machine 1, the air cylinder 22 operates through the sensing and the piston 23 operates. Slide piece 20 moves to position X
To the position Y, while the annular fabric 50 is
0, the sliding piece 2 is actuated through the operation of the piston 23.
0 returns from the position Y to the original position X again. The sliding piece 20 is moved from position X to position Y.
8, that is, when the pair of spindles 28 move forward, the half-folded annular fabric 50 is scooped up on the surfaces of the spindles 28, 28 as shown in FIG. 3
The portion 0 reaches the position of the bent portion 51 of the half-folded annular fabric 50, and senses the bent portion 51. As described above, when the bent portion 51 of the half-folded annular fabric 50 is sensed by the photoelectric tube 30, that is, the amount of light received by the light receiver 32 decreases and is detected to be less than a predetermined amount. In this case, it is considered that the supply of the half-folded annular fabric 50 has been performed normally. Further, the sliding piece 20
However, as described above, after returning from the position Y to the original position X, the edge portion 61 of the tubular body fabric 60 such as the waist portion is manually or automatically superimposed on the surface of the opening 52 of the annular fabric 50. After that, the overlap sewing 65 is started. As shown in FIG. 9, the half-folded annular cloth 50 is supplied in an abnormal state in which the opening 52 is not located below the presser foot 3 but at the opposite side of the photoelectric tube 30. In other words, if the opening 52 of the annular fabric 50 is sensed by the photoelectric tube 30 and the amount of light received by the light receiver 32 is detected to increase to a predetermined amount or more, it is regarded as an abnormal state. Then, an appropriate alarm is issued and the sewing operation is stopped. When an abnormal state is detected by the photoelectric tube 30, the annular cloth 50 is rolled by the rollers 10, 11,
12 and 13, and then re-attach the cloth 50 in a normal state, and in a state where the portion of the opening 52 of the cloth 50 is just located below the presser foot 3, The superimposition and sewing 65 with the body cloth 60 are performed. According to the present invention, in order to solve the above-mentioned problems, rollers 10, 11, 12, and 13, which are rotatable in a vertical plane at the front and rear positions of the sewing machine 1, are provided as appropriate. A sliding piece 20 is provided reciprocally at a front or rear position of the sewing machine 1, and a pair of support shafts 28, 28
A photoelectric tube 30 including a light emitter 31 and a light receiver 32 is appropriately provided, and a half-folded annular fabric 50 is wrapped around the rollers 10, 11, 12, and 13, respectively. Move forward and half-fold on the spindles 28, 28
The Jo annular cloth 50 engaging in the support state, the semi-folded shape
The bent portion 51 or the opening 52 of the annular fabric 50 is configured to be sensed through the photoelectric tube 30, and the bent portion 51 of the half-folded annular fabric 50 is
When the light is sensed by the phototube 30,
The light amount has decreased, and it has been detected that the light amount is equal to or less than the predetermined light amount.
In this case, the supply of the half-folded annular fabric 50 is normally performed.
And the sliding piece 20 is moved from the position Y to the original position.
After returning to the position X, the opening of the half-folded annular fabric 50 is opened.
Edge of cylindrical body cloth 60 such as waist on the surface of part 52
After manually or automatically polymerizing 61, the polymerized
5 is started, and furthermore, the half-folded annular cloth 5
0 is not positioned below the presser foot 3 and
In an abnormal state of being located at the position of the opposing phototube 30
When supplied, that is, the opening of the half-folded annular fabric 50
The part 52 is sensed by the phototube 30 and the light receiver 32
The received light amount increases, and it is detected that the
Is considered abnormal, an appropriate alarm is issued.
And a means for stopping the sewing operation, so that the opening 52 on the side of the edge of the fabric 50 is It is immediately detected through the photoelectric tube 30 whether or not it is located at the lower position, whereby the opening 52 on the fabric edge side and the tubular body edge 61 such as the waist are overlapped and sewn in a normal state. Since sewing can be performed and sewing errors can be eliminated, sewing efficiency and quality can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an entire sewing device according to the present invention. FIG. 2 is a schematic front view of FIG. FIG. 3 is a schematic side view of a rotatable roller according to the present invention. FIG. 4 is a schematic perspective view of a half-folded annular cloth according to the present invention. FIG. 5 is a partially enlarged cross-sectional view of the half-folded annular cloth according to the present invention. FIG. 6 is a cross-sectional view for explaining polymerization and sewing of a half-folded annular fabric and a tubular body fabric according to the present invention. FIG. 7 is a side view for explaining cloth sensing by a partial cross-section showing a state in which a pair of reciprocally movable spindles and a photoelectric tube are slid toward a half-folded annular cloth in the present invention. FIG. 8 is a side view for explaining cloth sensing by a partial cross section showing a state in which an opening of a half-folded annular cloth locked on a pair of support shafts is positioned below a presser foot in the present invention. FIG. 9 is a side view for explaining cloth sensing by a partial cross section showing a state in which a bent portion of a half-folded annular cloth locked on a pair of support shafts is positioned below a presser foot in the present invention. [Description of Signs] 30 Photoelectric tube 50 Annular fabric 51 Bend 52 Opening

Claims (1)

(57) [Claim 1] Rollers 10, 11, 12, and 13 rotatably provided in the vertical plane at the front and rear positions of the sewing machine 1 are provided as appropriate, and at the front or rear position of the sewing machine 1. The sliding piece 20 is provided so as to be reciprocally movable, and the sliding piece 20 is further provided with a pair of support shafts 28 and 28 and a photoelectric tube 30 including a light emitter 31 and a light receiver 32 as appropriate.
After wrapping the half-folded annular fabric 50 on 2 and 13, respectively,
The sliding piece 20 is moved toward the fabric 50 side, and the support shafts 28, 28
An annular fabric 50 of the Han'orijo on locking, the supporting state, the to the site of the bent portion 51 or the opening 52 of the half-folded annular cloth 50 is sensed through the phototube 30 Bent portion of the half-folded annular fabric 50
51 is detected by the phototube 30, that is,
The amount of light received by the optical device 32 decreases and is less than a predetermined amount of light.
Is detected, the supply of the half-folded annular fabric 50 is
Assuming that the sliding operation was performed normally,
After returning from Y to the original position X, the half-folded annular
A tubular body cloth such as a waist portion on the surface of the opening 52 of the ground 50
The edge 61 of 60 is manually or automatically polymerized
Then, a means for starting the overlap sewing 65, and further, the half-folding
The opening 52 of the annular fabric 50 is positioned below the presser foot 3.
Is located at the opposite side of the phototube 30
If it is supplied in an abnormal state, that is, the half-folded annular
The opening 52 of the fabric 50 is sensed by the phototube 30,
The amount of light received by the light receiver 32 increases and is equal to or greater than a predetermined amount of light.
Is detected as abnormal,
Means for issuing an appropriate alarm and stopping the sewing operation.
A device for sensing half-folded annular fabric, characterized in that: