JPH05115644A - Hemming - Google Patents

Abstract

PURPOSE:To improve workability in manufacture of cloth products such as towels by a method wherein, when an end of material cloth is hemmed, at a time point near the finish of hemming of a piece of cloth, work for positioning of a ruler for hemming of the next piece of cloth is started. CONSTITUTION:A towel roll 25 is drawn out by a drawer 11, and towel material 26 is cut by a cutter 13 of a cutting device 2 and held by a transfer member 7. The cut towel material 26 is transferred by the transfer member 7 to a hemming device 3 for hemming. That is, a ruler 17 positioned above a cloth receiving surface is made to come down, a cloth folding reference edge 17a is applied to a predetermined folding position 27 at an end of the towel material 26, and in this state, a folding member 15 is operated to form a first folded part. Next, the reference edge 17a is applied to a second predetermined folding position 30, and in this state, a second folding member 16 is operated to form a second folded part. After this hem folding, the hemmed end is sewn by a sewing device 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hem-folding method for hem-folding the edges of a cloth made of a material such as towels and sheets in the manufacture thereof.

[0002]

2. Description of the Related Art Heme folding has been conventionally performed as follows. Position the edge of the cloth on the cloth receiving surface. Next, a hem folding ruler is positioned above the cloth receiving surface. Then, the ruler is lowered straight so that the reference edge of the ruler is applied to the predetermined folding position at the end of the cloth. Next, a portion to be folded back at the end of the cloth is folded back by a folding member (also called a bending member) with the reference edge as a reference, and the folded portion is pressed by the folding member. Hold. Next, in the state in which the overlapping portion is held by the folding member, the ruler is pulled out from the overlapping portion and removed from the cloth receiving surface. Next, the superposed portion is pressed by the conveying member, and in this state, the end portion of the cloth on the cloth receiving surface is carried out by the conveying member. These operations are repeated one after another for each of the plurality of cloths (for example, see JP-A-1-192667).

[0003]

In this conventional hem folding method, the hem folding for one cloth is completed and then the hem folding for the next cloth is performed. Therefore, for a plurality of cloths, the cycle time for one cloth is increased. There is a problem that it takes a long time to double the number of cloths. Therefore, there is a demand to shorten the time and improve the efficiency.

The present invention is intended to solve the above-mentioned problems (technical problems) of the prior art and meet the above-mentioned demands. In order to carry out a cloth near the end of hem folding for one cloth, the cloth is carried out. When the transport member of is still left on the cloth receiving surface for hem folding, the work of positioning the ruler for hem folding for the next cloth is started to efficiently perform hem folding for multiple cloths. The purpose is to provide a hem folding method that is well performed.

[0005]

In order to achieve the above object, a hem folding method according to the present invention comprises a step of positioning an end portion of a cloth on a cloth receiving surface and a hem folding method above the cloth receiving surface. The step of positioning the ruler, the step of lowering the ruler straight down, and applying the reference edge for cloth folding in the ruler to the planned folding position at the edge of the cloth, and the planned folding portion at the edge of the cloth. While folding back with the folding member on the basis of the above-mentioned reference edge, and pressing and holding the overlapped portion by the folding member with the folding member, in the holding state of the overlapping portion by the folding member, the ruler is overlapped. A step of pulling it out from the cloth receiving surface and removing it from the cloth receiving surface; a step of pressing the superposed portion with a conveying member; In the hem folding method for hem folding each of a plurality of cloths by repeating the step of carrying out the end of the cloth on the cloth receiving surface from the conveying member, the ruler is located above the cloth receiving surface. The step of performing is performed by superimposing a ruler on the upper side of the carrying member while the carrying member is still positioned on the cloth receiving surface.

[0006]

The end of the cloth is positioned on the cloth receiving surface. Next, the ruler for hem folding, which is positioned above the cloth receiving surface in advance, is lowered straight so that the reference edge is applied to the planned folding position at the end of the cloth. Next, the portion to be folded back at the end of the cloth is folded back by the folding member with the reference edge as a reference, and the overlapped portion is pressed and held by the folding member. In the holding state of the polymerized portion, the ruler is pulled out from the polymerized portion and removed from the cloth receiving surface. Next, the superposed portion is pressed by the conveying member, and in this state, the end of the cloth on the cloth receiving surface is carried out by the conveying member. The ruler is superposed on the upper side of the carrying member while the carrying member is still located on the cloth receiving surface.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 simply shows the planar arrangement of various devices in the hem sewing machine 1. That is, reference numeral 2 is a cutting device for cutting a long towel material into a towel piece shown as an example of cloth, and 3 is a hem folding device for hem-folding the end of the towel piece. 4 is a sewing device for sewing a hem-folded end. These devices are arranged side by side in the horizontal direction using the table 5 in common. Further, two hem folding devices 3 and two sewing devices 4 are provided facing each other as shown in the drawing in order to hem fold and sew both ends of the towel. Reference numeral 6 denotes a groove for allowing the intermediate portion of the towel to hang down on the table 5. Reference numeral 7 is a first conveying member for conveying the cut towel pieces from the cutting device 2 to the hem folding device 3, and like a generally known hem sewing device, an arrow 7a is formed by a drive mechanism (not shown). The reciprocating movement within the range indicated by (5), holding the towel piece by descending on the table 5, and releasing the towel piece by ascending from there are configured. Reference numeral 8 is a second conveying member for conveying the towel pieces from the hem folding device 3 toward the replacement place 9, and reciprocating in the range shown by the arrow 8a, like the first conveying member. It is configured so that the towel piece can be held and released by the vertical movement with respect to the table 5. The reciprocating operation of the first and second conveying members 7 and 8 in the lateral direction is integrally performed. 10 is a carrying member for sewing, which is for carrying the towel pieces from the replacement place 9 through the place of the sewing device 4 to the carrying-out place 10b, and in the same manner as the above-mentioned carrying members, the range indicated by the arrow 10a. It is configured to be capable of reciprocating movement and vertical movement with respect to the table 5.

Next, the cutting device 2 will be described. The device is similar to the cutting device in the known hem folding device. That is, reference numeral 11 is a drawer, which is structured so as to be able to grasp the end portion of the original towel cloth 25 and can be moved back and forth as indicated by an arrow 11a. And the drawer 11
Positioning piece 12 for positioning the towel roll in the drawing path of the towel roll 25 and a cutter 13 for cutting it
And so on.

Next, as the hem folding device 3, in this example, a device for folding the end portion of the towel into three parts is shown. This device also has the same structure as a known device. That is, in FIG. 3, reference numeral 15 is a first folding member, 16 is a second folding member, and 17 is a ruler, which are respectively driven by a driving mechanism (not shown) such as vertical movement and horizontal movement required for hem folding as described later. It is configured to operate.

An ordinary sewing machine is used as the sewing device 4. In FIG. 1, 20 is a needle plate and 21 is a needle hole.

The second conveying member 8 is shown in FIGS. 3 (F) to 3 (H).
As shown in FIG. 3, it is formed in an L shape, and has a space 24 for receiving a ruler on the upper side of the pressing portion 8b for pressing the cloth. Further, the holding members 22 and 23 are attached to the lower side of the holding portion 8b so that the towel pieces can be held without slipping. The members 22 and 23 are made of, for example, a rubber material.

Next, the operation of the hem sewing machine 1 having the above construction will be described with reference to FIG.
2A to 2D and 3A to 3H showing the states of the hem sewing machine at various points in time. Note that (A) to (D) of FIG. 2 are 2A of FIG.
2D shows the state at the time indicated by 2D, and FIG.
(A) to (H) show the states at the time points indicated by 3A to 3H in FIG.

First, the overall operation of the hem sewing machine 1 will be described with reference to FIGS. In the cutting device 2, the drawing device 11
The towel roll 25 is pulled out by the cutter, and subsequently the towel piece 26 is cut by the cutter 13 and held by the conveying member 7.
It is performed like. The cut towel pieces 26 are carried to the hem folding device 3 by the first carrying member 7 as shown in FIGS. 2B and 2C. The hem folding device 3 hem folds the end of the towel element 26. Towel element 26 with hem-folded edges
Is carried to the holding place 9 by the second carrying member 8, where it is carried to the carrying device 10 for sewing as shown in FIG. 2C and sent to the sewing device 4 as shown in FIG. 2D. The sewing device 4 sewes the hem-folded end portion. The respective operations of the cutting device 2, the hem folding device 3, and the sewing device 4 are performed in parallel and repeatedly as is clear from FIGS.

Next, the hem folding operation of the towel piece 26 by the hem folding device 3 in the above operation process will be described in detail with reference to FIG. First, the first folding step is performed as follows. As shown in (A), the ruler 17 is previously provided above the cloth receiving surface (in this case, the upper surface of the table 5, the upper surface of the second folding member 16 and the upper surface of the first folding member 15 function as the cloth receiving surface). The towel element 26 is conveyed by the first conveying member 7 in this state, and the end 26a thereof is positioned on the cloth receiving surface. Next, as shown in FIG. 7B, the ruler 17 is lowered straight and the reference edge 17a for folding back the cloth is applied to the first scheduled folding position 27 at the end of the towel element 26. Next, as shown in (C), the first folding member 15 operates as indicated by the arrow, and the portion of the towel element 26 to be folded is planned.
28 That is, the end of the planned folding position 27 is the reference edge
The portion 29 folded back on the basis of 17a and formed into a superposed state by the folding back is the cloth receiving surface by the first folding member 15 (in the state where the folding is performed in this way, the upper surface of the table 5 and the second folding back). The upper surface of the member 16 functions as a cloth receiving surface) and is held.

Next, the second folding step is performed as follows. In the holding state, ruler 17 as shown in (D)
Is withdrawn from the polymerized portion 29 as indicated by the arrow,
Then, the reference edge 17a is applied to the second planned folding position 30, and the superposed portion 29 is held and held in that state. Then, in this state, the first folding member 15 operates as shown by the arrow and returns to the original position. Next, the second part to be folded back on the end side of the planned folding position 30
When the second folding member 16 operates as indicated by the arrow as shown in (E), 31 is folded back on the basis of the reference edge 17a, and the outer side of the portion 33 which is overlapped by the folding. The part is the cloth receiving surface by the second folding member 16 (in the state where folding is performed in this way, the table 5
The upper surface of (functions as a cloth receiving surface) is pressed and held. This completes the second folding step.

When the second folding step is completed, the ruler 17 is pulled out from the overlapped portion 33 in the holding state as shown by the arrow in (F) to the retracted position avoiding above the cloth receiving surface. To be done. Next, as shown in (G), the second conveying member 8 descends and presses the inner portion of the overlapping portion 33, and then the second folding member 16 (H).
It is returned to its original position as shown in. In this state, the ruler 17 is moved toward the preparation position for the next cloth, but in the process, it is moved to the position shown in (H) in order to avoid the positioning device of the ruler 17 which will be described later. Then, in this state, the second conveying member 8 is moved in the direction perpendicular to the paper surface, the hem-folded towel element piece 26 is carried out from the cloth receiving surface, and the next towel element piece 26 (A) is moved. Thus, it is brought onto the cloth receiving surface by the first conveying member 7. In the process, the ruler 17 is brought to the preparation position as shown in (A). The positioning at the preparatory position is performed by previously positioning the positioning device 35 at a position as shown in (A) and contacting the lateral moving body supporting the ruler 17 there. The work of positioning the ruler 17 at the preparation position may be performed at any time after the second conveying member 8 presses the cloth and before the next cloth is brought to the cloth receiving surface.

One cycle of the hem folding performed as described above is shown by reference numeral 37 in FIG. 4, and its time is, for example, 6.
5 seconds (the operation time of the hem folding device 3 is 5 seconds, and the operation time of the second transport 8 is 1.5 seconds). Further, the start of the one cycle, that is, the start of the positioning work of the ruler 17 is, for example, 0.5 seconds earlier than the end of the one cycle (see reference numeral 38 in FIG. 4).
Done. Therefore, when hem-folding a plurality of towel pieces is repeated one after another, the hem-folding can be performed in substantially 6 seconds per towel piece.

To describe a different embodiment, the hem folding device 3 may be a device that folds the end of the towel element in two. In that case, there is no second folding step described above. That is, after the state shown in FIG. 3C is reached, the ruler 17 is retracted from above the cloth receiving surface as shown in FIG. Then, in this state, the second conveying member 8 arrives on the overlapping portion 29 as shown in (G) and holds it.
Then, in the holding state, the ruler may be positioned at the preparation position as shown in (A), and the towel piece folded by the hem by the second conveying member 8 may be carried out to the next step.

[0019]

As described above, according to the present invention, the cloth 26
First, when the ruler 17 is applied to the cloth 26 when the hem is folded, the ruler 17 is pre-positioned above the cloth receiving surface and straightly lowered from the cloth receiving surface, so that the cloth 26 is laterally displaced. The effect is that you can reach the correct position without

Secondly, when the cloth 26 is folded, since it is folded based on the ruler 17 which is directed to such an accurate position, the fold line is neat and the length dimension of the portion which is overlapped by folding back is measured. Has the effect of being accurate.

Thirdly, even if the ruler is used as described above, when the ruler 17 is removed after folding, since the overlapped portion is removed while being held by the folding member 16, the accurate size of the overlapped portion is obtained. There is an effect that can be maintained as it is.

Fourth, when carrying out the hem-folded cloth as described above, the overlapped portion is held by the conveying member 8 and carried out in that state, so that the overlapped portion having the correct size is maintained as it is. There is an effect that can be carried out.

Moreover, even in the case where the folded portion is pressed by the conveying member 8 as described above, when hem-folding one cloth as described above and then hem-folding the next cloth,
Since the ruler 17 is superposed on the upper side of the carrying member 8 in a state where the carrying member 8 is still located on the cloth receiving surface, the next cloth is replaced with the carry-out of the cloth after the hem folding. The feature is that if you bring it to the cloth receiving surface, you can immediately apply the ruler 17 to the cloth and start the hem folding work. This means that when hem-folding multiple fabrics one after another, the hem-folding cycle for each fabric must be repeated before the previous fabric cycle is completed, i.e., the fabric remains on the fabric receiving surface. During that time, the next cloth cycle can be started, that is, the ruler for the next cloth can be prepared, and there is an advantage that the start of each cycle can be sequentially advanced to the front to improve the efficiency.

[Brief description of drawings]

FIG. 1 is a plan view showing an arrangement state of each mechanism in a hem sewing device.

2A to 2D are explanatory views of the operation of the hemming device of FIG.

3A to 3H are sectional views for explaining the operation of the hem folding device.

FIG. 4 is a time chart for explaining the operation of the hem sewing device.

[Explanation of symbols]

 8 Transport member 16 Folding member 17 Ruler 26 Towel element

Claims (1)

[Claims] 1. A step of locating an end of a cloth on a cloth receiving surface, a step of locating a ruler for hem folding above the cloth receiving surface, and a step of straightly descending the ruler to fold back the cloth on the ruler. A step of applying a reference edge for use to a predetermined folding position at the edge of the cloth, and a portion to be folded back at the edge of the cloth is folded back by the folding member with the reference edge as a reference, and the folding is performed to form a superposed state. In the step of pressing and holding the part that has become the folding member, and in the holding state of the overlapping portion by the folding member,
A step of removing the ruler from the overlapped portion and removing it from the cloth receiving surface; a step of pressing the overlapped portion by a conveying member; and a step of pressing the overlapped portion by the conveying member and the conveying member by the conveying member. In the hem folding method of repeating the step of carrying out the end of the upper cloth from the cloth to hem-fold each of the plurality of cloths, the step of locating the ruler above the cloth receiving surface is the cloth receiving surface. A hem folding method, wherein a ruler is superposedly provided on the upper side of the conveying member while the conveying member is still positioned on the upper side.