JP3278728B2 - Three-fold heme forming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-fold hemming apparatus used for forming a three-fold hemm at an end of a cloth made of a cloth material such as towels and sheets.

[0002]

2. Description of the Related Art An apparatus of this kind is disclosed in Japanese Patent Laid-Open No. 4-283.
No. 94 is disclosed. In this device, a tri-folding device at the end of the cloth and a sewing machine for sewing the tri-folded portion are arranged side by side, and between the two, a tri-folded portion is transported from the tri-folding device toward the needle drop position of the sewing machine. A transfer means is provided. Moreover, the above-mentioned three-folding device has a receiving stand, a secondary folding piece, and a primary folding piece which are arranged side by side in a horizontal direction in order to put the end of the cloth on them, and The primary folds allow the cloth on them to be folded back to the side of the cradle so that they can move up and down toward the upper side of the cradle, respectively. A ruler is provided for exchanging the scheduled folding position with the scheduled secondary folding position of the cloth on the receiving table.

According to the above apparatus, the cloth can be folded three times, and the three folded portions can be sewn with a sewing machine. The width of the part can be changed. In addition, since the position of the three folds can be in a fixed positional relationship based on the needle drop position of the sewing machine, regardless of the width of the three folds, the formed three folds are always stitched along the same transfer path. It is convenient to send it to a location.

[0004]

However, in the above-mentioned conventional apparatus, in order to make the position of the tri-fold part a fixed positional relationship with respect to the needle drop position of the sewing machine as described above, the width of the tri-fold part is required. There is a problem that the range of change in width is narrow and limited. That is, in the conventional apparatus, the scheduled primary folding position is set on the cloth receiving surface of the secondary folded piece. Therefore, even if the planned primary folding position is changed back and forth, there is naturally a limit in its dimensions. In order to solve such a problem, it is conceivable to change the operation position of the secondary folding piece, but in such a case,
There is a large problem that the completed three-folded portion cannot be formed at a position based on the needle drop position of the sewing machine.
As described above, in the above-described conventional apparatus, the desired width is very wide or narrow, and the primary folding position or the secondary folding position is determined only by the operation range of the secondary fold and the primary fold. Even if the width is largely changed, there is a problem that it is not possible to cope with the desired wide or narrow width of the trifold including the primary fold cloth and the secondary fold cloth.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and even if the width of the three-fold portion is changed in a range larger than that of the conventional example, the present invention can be completed in any width. It is an object of the present invention to provide a three-fold heme forming apparatus capable of setting a three-fold part in a fixed positional relationship with respect to a needle drop position of a sewing machine.

[0006]

SUMMARY OF THE INVENTION A three-fold hemming apparatus according to the present invention comprises a three-fold device for three-folding an end of a cloth and a sewing machine for sewing the three-fold part in a cloth transfer direction. And a transfer means for transferring the expected needle drop position at the base of the three-folded portion in the three-fold device toward the needle drop position of the sewing machine. In addition, the three-folding device is provided with a pedestal having a cloth receiving surface on which the main part of the cloth is placed, a cloth receiving surface for placing the free end of the cloth end, A primary fold piece that can freely move forward and backward in the direction, and a secondary fold that has a cloth receiving surface on which the end of the cloth can be placed, and that can freely move up and down and in the direction of the receiving table. Pieces, and their pedestals, secondary fold pieces, and primary fold pieces are arranged side by side in the direction orthogonal to the transfer direction of the transfer means. In addition, the upper position is provided with a ruler for exchanging addresses with the scheduled primary folding position of the cloth on the secondary folding piece and the secondary folding expected position of the cloth on the receiving stand. The ruler is addressed to the position of the secondary folded piece on the cloth receiving surface where the primary folding is to be performed, and the portion of the primary folded cloth protruding to the non-main body side of the cloth therefrom is lifted by the primary folded piece, and the above ruler is removed. The ruler is folded back to the main body side of the cloth with reference to the position of the secondary folding, which is set slightly above the free end of the folded back part on the side opposite to the main body side of the cloth and set on the tray. , And lift the secondary fold cloth part that protrudes from the non-main part side of the cloth with the secondary fold piece,
The cloth is folded back toward the main body side with reference to the ruler to form a three-folded end portion, and the needle dropping position at the base of the three-fold portion formed there is the needle dropping position of the sewing machine. In the three-fold heme forming device that is formed at a fixed needle drop corresponding reference position determined based on the position, the secondary fold piece and the primary fold piece are determined based on the needle drop position of the sewing machine. The operation position can be freely changed in a direction orthogonal to the transfer direction with respect to a certain needle drop corresponding reference position, and the receiving table is further configured such that the secondary folding piece is in a direction orthogonal to the transfer direction. In the retracted state, the position of the cloth in the direction opposite to the main body side can be freely changed with respect to a fixed needle drop corresponding reference position determined based on the needle drop position of the sewing machine, and the cloth on the receiving table is formed. In the direction of the anti-main body side of the cloth Position to allow expansion, but you have to allow more third folded portion formed consisting of primary folding fabric and secondary folding cloth large dimensions.

[0007]

The end of the cloth is laid on the cradle, the secondary folded piece and the primary folded piece. When the ruler is applied to the cloth at the position where the primary folding is to be performed, the primary folding piece is operated and the cloth is folded. Next, when the ruler is addressed to the scheduled secondary folding position, the secondary folding piece is operated to fold the cloth, and the end of the cloth is folded three times. The three-fold portion is transferred to the needle drop position of the sewing machine by the transfer means and is sewn. When changing the width of the three-fold portion to be formed, the above-mentioned primary folding position and the secondary folding position are changed, and the receiving stand, the secondary folding piece and the primary folding piece are referred to the needle drop position of the sewing machine. Change to position. By performing the same three-folding operation in this state, the completed three-folded portion can always be in a fixed positional relationship with the needle drop position.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, which shows an apparatus for forming a three-fold hem at the end of a piece of towel cloth as an example of a cloth, the apparatus is configured by arranging known members indicated by reference numerals 2 to 10 on a table 1 as shown in the figure. is there. Reference numeral 2 denotes a cutting device for drawing in and cutting a long towel cloth 11 into a towel cloth piece 12. Reference numeral 3 denotes a hem folding device, which folds both ends of the toweling piece 12 three times. Reference numeral 4 denotes a sewing device for sewing the three-folded end portion into a completed towel 13. Each of the above-mentioned devices is arranged in order in the transport direction of the towel cloth piece 12 (downward in FIG. 1) orthogonal to the drawing direction of the long towel cloth 11 in the cutting device 2 (rightward in FIG. 1). Reference numeral 5 denotes a relay place defined between the hem folding device 3 and the sewing device 4, and reference numeral 6 denotes a discharge place of the completed towel 13. Reference numeral 7 denotes a first transfer means for transferring the towel piece from the cutting device 2 to the hemming device 3. Numeral 8 denotes a second transport means, and
Is transferred from the place of the hem folding device 3 to the discharge place 6 through the place of the sewing device 4, and is provided with a former-stage transfer means 9 which takes charge between the hem folding device 3 and the relay place 5, And a post-stage transfer means 10 serving between the discharge locations 6.

The cutting device 2 will be described. Reference numeral 15 denotes a pull-in device, which is configured to be able to hold the tip of the long towel cloth 11 and reciprocate in the direction of the arrow. The reciprocating distance is variable, and the position of the leading end of the long toweling 11 can be changed. Reference numeral 16 denotes a cutter, which can be repositioned in a direction along the drawing direction as indicated by an arrow.

The hem folding device 3 has two tri-folding devices 20, 20 for one end and the other end of the towel base piece 12. Three-fold device
Reference numeral 20 denotes a folding device 21 disposed below the place where the towel base piece 12 is located as shown in FIG. 2 (B) and a ruler device 22 disposed above.
And The folding device 21 has a receiving table 23 provided flush with the table 1, a primary folded piece 24, and a secondary folded piece 25. The primary folded piece 24 and the secondary folded piece 25 are provided. Numeral 25 can move up and down by a folded piece driving mechanism (not shown) and advance and retreat in the direction of the receiving table 23 (left and right direction in FIG. 1). The entire folding device 21 can be repositioned in a direction parallel to the retracting direction.
The ruler device 22 includes a ruler 26 and a ruler operating mechanism (not shown) for vertically moving the ruler 26 and moving the ruler 26 in a direction parallel to the retracting direction.

The sewing device 4 includes a main portion 12 of a towel piece.
There are two sewing machines 31, 31 for the three folds at both ends of the machine. FIG.
In the above, 32 indicates the needle of the sewing machine. L is a reference position corresponding to the needle drop in the cutting device 2 and the hem folding device 3, that is, the sewing machine.
This is a virtual line for indicating a position corresponding to the 31 needle drop position 32a.

Each of the transfer means 7, 9, and 10 shown in the figure is only a transfer piece that directly contacts the towel base piece 12. Each transfer piece can be vertically moved toward the upper surface of the table 1 and horizontally moved along the upper surface of the table 1 by an operating mechanism (not shown).

The outline of the operation of the towel forming apparatus is as follows. The pull-in device 15 in the cutting device 2 draws in the long toweling 11, the transfer piece 7 holds down the long toweling 11, and the cutter 16 cuts. The transfer piece 7 carries the cut towel piece 12 to the hem folding device 3. The hem folding device 3 folds both ends of the main portion 12 of the towel piece. Next, the towel piece 12
Is carried by the transfer piece 9 to the relay station 5, where the transfer piece
Changed to 10. The transfer piece 10 passes the trifold portion to the needle drop position of the needle 32, and the trifold portion is sewn. The transfer piece 10 releases the completed towel 13 at the discharge location 6. The operations of the cutting device 2, the hem folding device 3, and the sewing device 4 are performed in parallel and each of them is repeatedly performed.

FIG. 2 shows the state of each device in the above case. The formation of a three-fold hem having a narrow width of, for example, 14 mm is shown by solid lines in (A), (B), and (D). The leading end position of the toweling 11 in the cutting device 2 is indicated by reference numeral 35. In the upper position of the tri-folding device 20, an intended address of the secondary fold on the cloth receiving surface of the secondary fold piece and an expected secondary fold position 37 of the cloth on the cradle 23 are exchanged. And a ruler 26 for the movement. In the three-fold device 20, the main part 12 of the towel cloth
Is placed on the cloth receiving surface on the cradle 23, and the primary folded cloth 12c at the end 12a is spread on the cloth receiving surface of the primary folded piece 24. In this state, the ruler 26 is addressed to the scheduled primary folding position 36 in (B), and the primary folded piece 24 rises toward the upper side of the receiving stand 23 as indicated by an arrow 24a, advances and moves to the end of the main part 12 of the towel piece. The primary folded cloth 12c in 12a is folded toward the main part 12 of the cloth with reference to the ruler 26 as shown in the figure. Next, the ruler 26 is positioned at a position where the secondary folding is to be performed 37, which is located slightly closer to the opposite side of the cloth than the free end 12b (see FIG. B) in the folded portion, and is set on the receiving base 23. And the primary fold 24 returns as indicated by arrow 24b. Next, the portion of the secondary fold cloth 12d which is on the side opposite to the main body portion of the cloth from the scheduled secondary fold position 37 is
5 and is folded back toward the main body side of the cloth with reference to the ruler 26 to form a three-folded end 12a there. That is, the end of the main portion 12 of the towel piece is bent as shown by the imaginary line to form a three-fold portion 38. In this case, the expected needle drop position 38b in the base portion 38a of the three-fold portion 38 is located at the needle drop corresponding reference position L. So that the retraction tip position 35 and three folding device
The position of the folding device 21 in 20 and the primary and secondary scheduled folding positions 36 and 37 are set. Next, after the ruler 26 is retracted, the base 38a of the three-fold part 38 is pressed by the transfer piece 9 of FIG. 1 for transfer, and the secondary fold 25 returns. The tri-folded portion 38, which is tri-folded in the tri-folding device 20, is transferred so that the expected needle drop position 38b in the original portion 38a corresponds to the needle drop position 32a of the sewing machine. Thereafter, the needle 32 of the sewing machine sewes the base portion 38a of the three-fold portion 38 as shown in (D) to complete the three-fold hem.

The cutter 16 and the three-folding device on the corresponding side
In the sewing machine 20 and the sewing machine 31, a similar operation is performed in a symmetrical positional relationship with FIG.

The formation of a towel with a three-fold hem with a long dimension, for example, 25 mm, is performed as shown by the imaginary lines (A) and (D) and (C). The leading end position is changed to the position indicated by reference numeral 35 '. As is clear from the comparison between (B) and (C) in the tri-folding device 20, the cradle 23 is located at the needle drop position of the sewing machine.
The secondary folded piece 25 is freely repositioned in a direction perpendicular to the transport direction (left-right direction in FIG. 1) with respect to a fixed needle drop corresponding reference position L determined based on 32a,
At a forward position (a position advanced leftward in FIG. 2B) and a retracted position (a position retracted rightward in FIG. 2C), a scheduled secondary folding position of the cloth on the receiving table 23 37, 37 'can be displaced and expanded in the direction opposite to the main body side of the cloth, so that a three-fold part 38 composed of the primary fold cloth 12c and the secondary fold cloth 12d of larger dimensions can be formed. In addition, as is clear from the comparison between the figures (B) and (C), the secondary fold 25 and the primary fold
The change of the operating position in a direction perpendicular to the transfer direction with respect to a fixed needle drop corresponding reference position L determined based on the needle drop position 32a of the sewing machine (rightward as shown in FIG. The position of the bending device 21 with respect to the needle drop corresponding reference position L is changed, and the operation trajectories of the primary and secondary scheduled bending positions 36 ', 37' are changed. Be changed. In this state, the operation is performed based on the same idea as described above. As a result of the above changes,
The expected needle drop position of the base portion 38a is located at the needle drop corresponding reference position L.

FIGS. 3 and 4 show another embodiment of the present invention, in which the secondary folding piece 25e advances to a certain position regardless of the position change of the folding device 21e. It is. In the figure, reference numeral 40 denotes a fixed frame, and 41 denotes a movable frame that can freely move with respect to the fixed frame 40 in a direction parallel to the drawing direction of the long toweling. Reference numeral 42 denotes a position changing mechanism, which comprises a screw rod 43 rotatably mounted on the fixed frame 40, a handle 44, and a screw 45 mounted on the movable frame 41 and screwed with the screw rod 43. Reference numerals 46 and 47 denote drive mechanisms for primary and secondary folded pieces, respectively, and reference numerals 46a and 47a denote respective movable parts. Reference numerals 48, 49 and 50, 51 denote stoppers for determining the forward and backward positions of the folded pieces, respectively, which are attached to the movable frame 41 or the fixed frame 40 as shown in the figure. With this configuration, even if the position of the bending device 21e is changed by operating the handle 44, the forward position of the secondary folding piece 25e is fixed by the stopper 50.

In the above-described configuration, both when forming the narrow three-fold portion 38e as shown in FIG. 3A and when forming the wide three-fold portion 38e as shown in FIG. As described above, the secondary fold 25e can be covered so as to leave only the original part 38ae of the three fold part, and the secondary fold can be reliably performed. In addition,
Functionally, portions that are considered to be the same as or equivalent to those in the preceding figure are denoted by the same reference numerals as in the preceding figure, with the letter e added, and redundant description is omitted. (Also in the subsequent figures, the same concept is used to add the letter f, and redundant description will be omitted.)

[0019]

As described above, according to the present invention, not only can a three-fold hem be formed at the end of the cloth, but in that case,
By changing the scheduled primary folding position 36 and the scheduled secondary folding position 37, there is an effect that a three-fold hem having a desired width can be formed.

Furthermore, if the desired width is very wide or narrow, the expected primary folding position 36 or the expected secondary folding position 37 is limited only by the operating range of the secondary folding piece 25 and the primary folding piece 24. Even in the case where it is not possible to make a large change and it is not possible to cope with the desired wide or narrow fold of the primary fold 12c and the secondary fold 12d, the secondary fold according to the invention of the present application. The piece 25 and the primary folded piece 24 are located at the needle drop position 32 of the sewing machine.
With respect to a fixed needle drop corresponding reference position L determined based on a, the operation position can be freely changed in a direction orthogonal to the transfer direction, and the receiving table 23 further includes the secondary folding piece 25. Is retracted in a direction orthogonal to the transport direction, the cloth is repositioned in the direction opposite to the main body side with respect to a fixed needle drop corresponding reference position L determined based on the needle drop position 32a of the sewing machine. To allow the secondary folding expected position 37 of the cloth on the cradle 23 to be displaceable and expandable in the direction opposite to the main body side of the cloth, and from the primary folding cloth 12c and the secondary folding cloth 12d of larger dimensions. Even if the desired width of the primary fold cloth 12c and the secondary fold cloth 12d is very wide or narrow, the receiving stand 23 , Primary fold
By changing the operating location of 24 and secondary fold 25,
The position of the completed three-fold part 38 is set at the needle drop position 32a of the sewing machine 31.
There is a feature that it can be formed at the needle drop corresponding reference position L based on This means that when the completed three-fold part 38 is sent to the needle drop position of the sewing machine, even if the desired width is very wide or narrow, it is formed regardless of the width of the three-fold hem. It is only necessary to send the folded portion 38 to the needle drop position along the same transport path, which is advantageous.

[Brief description of the drawings]

FIG. 1 is a plan view of a three-fold heme forming apparatus.

FIGS. 2A, 2B, 2C, and 2D are diagrams for explaining a step of forming a three-fold heme; FIGS.

FIGS. 3A and 3B are views showing a state of a secondary folding step in different embodiments.

FIG. 4 is a diagram schematically showing a bending device for performing the process of FIG. 3;

[Explanation of symbols]

 20 Tri-fold device 23 Cradle 24 Primary fold 25 Secondary fold 26 Ruler 31 Sewing machine

Claims (1)

(57) [Claims] 1. A three-folding device for three-folding an end of a cloth and a sewing machine for sewing the three-folded part are arranged in the direction of transporting the cloth, and the three-folding device is interposed therebetween. A transfer means for transferring the expected needle drop position at the base of the three-folded portion of the device toward the needle drop position of the sewing machine is interposed, and the three-fold device includes a main portion of the cloth. A primary fold with a pedestal provided with a cloth receiving surface for mounting the side and a cloth receiving surface for mounting the free end of the cloth end, and capable of moving up and down and moving in the direction of the pedestal freely. And a secondary folding piece having a cloth receiving surface on which the end of the cloth is placed, and which is capable of moving up and down and moving forward and backward in the direction of the receiving table. The pieces and the primary folds are arranged side by side in the direction orthogonal to the transfer direction of the transfer means, and the upper position is And a ruler for alternately addressing the scheduled secondary folding position of the cloth on the receiving table, and the primary folding scheduled position of the secondary folded piece on the cloth receiving surface. To the main folded side of the cloth, which is lifted by the primary folded piece, and folded back to the main body side of the cloth based on the above ruler. At a position slightly closer to the non-main body side of the cloth than the free end of the cloth, and the ruler is addressed to the scheduled secondary folding position set on the receiving stand, and the ruler is protruded from there to the non-main body side of the cloth. Lift the part of the secondary folded cloth by the secondary folded piece, fold it back to the main part side of the cloth based on the ruler,
A three-folded end portion is formed therein, and a predetermined needle drop position at the base of the three-fold portion formed there is formed at a fixed needle drop corresponding reference position determined based on the needle drop position of the sewing machine. In the three-fold heme forming apparatus, the secondary fold piece and the primary fold piece are different from the transfer direction with respect to a certain needle drop corresponding reference position determined based on the needle drop position of the sewing machine. The operation place can be freely changed in the orthogonal direction, and further, the receiving table is based on the needle drop position of the sewing machine in a state where the secondary folded piece is retracted in a direction orthogonal to the transport direction. It is possible to freely change the position of the cloth in the direction opposite to the main body side with respect to the fixed reference position corresponding to the predetermined needle drop, and set the expected secondary folding position of the cloth on the receiving table in the direction opposite to the main body side of the cloth. To expand the displacement, and with the primary fold cloth of larger dimensions Three folding heme forming apparatus characterized that you have to allow the formation of a three-folded portion consisting of the following folding cloth.