JPH02177996A - Cloth clamping device - Google Patents

Abstract

PURPOSE:To prevent the dislocation of a clamping cloth, to smooth an opening and closing operation, and to freely set an opening and closing sequence by rotating a cam member having plural cam parts by an actuator, executing the opening and closing operation for the clamping members of respective cloth clamping parts, and further changing the phases of the cam parts. CONSTITUTION:A drive mechanism F is composed of a cam member 54 in which disk shaped cam parts 55a to 55e are fixed to a rotary shaft 54a rotatably supported to a frame body 14a and a clamping cylinder 16 as the actuator connected through a link 18 to one edge of the axial direction of the rotary shaft 54a. When the rotary shaft 54a is rotated in one direction by the clamping cylinder 16, the cam parts 55a to 55e are rotated and successively separated from the side of the base edge of cloth pressing clamping pieces 51. The cloth pressing clamping pieces 51 are successively rotated by the spring force of springs 53, and clamping is executed. Since the respective cloth pressing clamping pieces 51 are directly opened and closed by the cam parts 55a-55e, horizontal directional force never works, and an object to be sewed C is never dislocated. Further, the opening and closing sequence of the cloth pressing clamps 51 can be freely set according to the phases of the cam parts 55a-55e.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fabric gripping device that is installed in, for example, a shirring mechanism that applies shirring to and clamps a sewing material.

(Prior Art) It is generally well known that when sewing multiple overlapping objects, for example, two pieces of fabric, a so-called shirring process is performed to give the upper fabric a wavy margin relative to the lower fabric. .

The shirring mechanism that provides such shirring is equipped with a fabric gripping device that grips the edge of the fabric during shirring. This fabric gripping device includes, for example, a presser holder on which the edge of the fabric is placed, and a plurality of presser holders arranged parallel to each other on the pedestal to grip the edge of the fabric. It consists of a presser piece and a cam that moves linearly (directly) in a tangential direction to the presser piece (the presser receiver is in the longitudinal direction of the table) to move the free end of the presser piece toward and away from the table. something is proposed.

Here, the presser piece is provided with a spring that presses its free end toward the white side and a cam roller that slides into contact with the cam, and when the cam roller rides on the peak of the cam, the force of the spring is applied. The free end moves away from the pedestal against the pressure, and when the cam roller descends to the trough of the cam, the free end comes into contact with the pedestal due to the force of the spring.

Before gripping the fabric, the cam roller is placed on the peak of the cam, and the free end of the presser piece is lifted from the base to keep it open. Then, place the edge of the lower cloth on a stand, place the shirring bin on top of the lower cloth, and place the edge of the upper cloth on top of the shirring bin. After doing this, when the cam is linearly moved by working with an actuator such as a cylinder, the cam roller descends into the trough of the cam, and the free end of the presser piece descends one after another onto the upper fabric, forming an edge of the fabric. Grasp the edges. After this, if you remove the shirring bottle, you can apply shirring to the upper fabric.

(Problem U to be Solved by the Invention> However, according to the fabric gripping device described above, since the presser piece is opened and closed by a cam that moves directly in the lateral direction with respect to the presser piece, for example, the free end of the presser piece is lifted. edge,
A lateral force is applied from the cam to the presser piece, causing the presser piece to move slightly in the same direction, which may cause the fabric to shift.Also, when the free end of the presser piece descends, the base of the presser piece may There were drawbacks such as a ``warp'' on the end side, which prevented smooth operation.

In addition, the opening and closing order of the presser pieces is such that when the cam moves forward, the presser pieces located at one end open in order, and when the cam moves back, they close in order from the presser piece located at the other end. The opening and closing order of the pieces is limited, for example in the center position! ] There was a drawback that the opening and closing order of the presser pieces could not be freely set such that the presser pieces located on both sides were closed after the presser pieces were closed.

This invention solves the above-mentioned problems of the prior art, and its purpose is to eliminate the fear that the gripped fabric will shift, and to allow the opening/closing operation to be carried out by hand, and to allow the opening/closing order to be freely changed. We present a fabric gripping device that can be set [
4%.

(Means for Solving the Problem) In order to achieve the above object, the invention of claim (1) includes a plurality of fabric gripping parts arranged in a line along the edge of the fabric to grip and release the edge of the fabric. And a drive 8 that independently operates the plurality of fabric gripping parts! and the fabric gripping portion is constituted by a pair of gripping members that can be opened and closed to grip an edge of the fabric when closed and release the edge of the fabric when opened, and the drive v4 side and each The cam member has a plurality of cam parts disposed opposite to the fabric gripping part, and the cam part engages the gripping member during rotation to open and close the cam member, and an actuator rotates the cam member. It is characterized by

Further, in the invention according to claim (2), the cam member is configured to move the plurality of cloth gripping parts arranged along the edge of the cloth from the cloth gripping part located on one end side to the cloth gripping part located on the other end side. It is characterized in that a plurality of cam portions are arranged with phases shifted from each other so as to sequentially open and close.

(Function) In the invention of claim (1), when the edge of the fabric is held between the pair of gripping members of each fabric gripping part and the actuator is operated, the cam member rotates and the edge of the fabric is held between the pair of gripping members of each fabric gripping part. The respective force parts disposed opposite to each other engage with the gripping members to open and close the respective gripping members.

At this time, if each cam part is set to engage the gripping member at the same time, the fabric gripping part can be opened and closed at the same time. Also, the cam portion facing the fabric gripping portion at the center position first engages with the gripping member of the fabric gripping portion, and then the cam portion facing the fabric gripping portions at both end positions engages the gripping member of the fabric gripping portion. If you set it to engage with the member,
After opening and closing the cloth gripping portion at the center position, the cloth gripping portions at both end positions can be opened and closed.

Further, in the invention of claim (2), when the edge of the fabric is set between the pair of gripping pieces of each fabric gripping part and the actuator is operated, the cam member rotates and is first located on one end side. A cam portion disposed opposite the fabric grip engages a gripping member of the fabric grip, and an adjacent cam portion then engages a gripping member of the opposing fabric grip.

In this way, each cam portion sequentially engages with the gripping member and opens and closes sequentially starting from the fabric gripping portion located at one end.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

1 to 9 show an embodiment of the present invention.

FIG. 1 shows the entire automatic sewing machine A, and the fabric gripping device of the present invention is used next to the shirring i installed in this automatic sewing machine.

First, to explain the outline of the automatic sewing machine main body with reference to the first drawing, on the right side of the automatic sewing machine main body A, there is a sewing machine file A.
1, an operation panel 2 for operating this sewing mechanism 1, a rightward intermediate presser forming bag [3, and a leftward intermediate presser forming device 4 are arranged.

Further, in the center of the automatic sewing machine main body A, a table B is arranged, which is made up of a cloth setting table front end part 7, a cloth setting table central part 8, a cloth setting table left part 1, and a cloth setting table left part 10. An article to be sewn, for example, two overlapping pieces of fabric C, is set on the front end portion 7 of the cloth setting table, the center portion 8 of the cloth setting table, the right portion 9 of the cloth setting table, and the left portion 10 of the cloth setting table.

Here, the sewing machine t111 has a built-in sewing means for sewing the fabric, such as a needle, and follows the scheduled needle drop path corresponding to the sewing pattern of the fabric C set on the table B. Move in the left-right direction and front-back direction on the top.

A middle presser unit 43 equipped with a shirring machine $11D is installed at a position near the rear of the central portion of the table B.
Further, the right side and the left side are respectively equipped with a right side end presser unit 5 and a left side end presser unit 6, which also have a shirring 1fi ellipse.

The right end cloth presser unit 5 is mounted on a presser foot 13 that moves toward and away from the left portion 9 of the cloth setting table by a unit movement motor 11. This right (11 end cloth presser unit 5) is connected to a horizontal cloth presser unit 14 equipped with a shirring mechanism that applies shirring to the collar tank part of the workpiece C and clamps it, and a horizontal cloth presser unit 14 that applies shirring to the collar tank part of the workpiece C and clamps it. The sewing machine is composed of a knitting presser unit 27, which is also equipped with a shirring mechanism, and a knitting presser unit 31, which clamps the hem of the workpiece 0.

Next, the shirring 1 installed in the horizontal fabric pressing unit 14
The fabric gripping device of MtllD will be described in detail with reference to FIGS. 2 to 9.

This fabric gripping device is composed of a plurality of fabric gripping parts E arranged in a line along the edge of the object to be sewn C, and a drive mechanism F that independently operates the plurality of fabric gripping parts E. has been done.

The fabric gripping part E includes a clamp base 50 extending from the bottom surface of the frame 14a of the horizontal fabric presser unit 14, and a plurality of clamp bases (five in the drawing) arranged in parallel on the clamp base 50.
It is composed of a work clamp piece 51.

Here, the clamp stand 50 is one gripping member that constitutes the fabric gripping part E, and the clamp stand 50 of each fabric gripping part E
(one gripping member) are connected to each other (formed integrally). Further, the cloth presser clamp piece 51 is the other gripping member constituting the fabric gripping part E, and the frame 14m is configured to grip the edge of the workpiece C set on the clamp table 50 with the clamp table 50. The clamps are rotatably attached to the clamps 51a through the bins 51a, so that they can each move independently with respect to the clamp table 50. A spring 53 is interposed between the clamp base 50 and each workpiece clamp piece 51 to bias the press face 51b of the workpiece clamp piece 51 against the press face 50a (11) of the clamp base 50. Note that the holding surface 50a of the clamp base 50 and the holding surface 51b of the cloth presser clamp piece 51 are each provided with anti-slip irregularities.

The drive mechanism F also includes a cam member 54 in which disc-shaped cam portions 55a to 55e are fixed to a rotating shaft 54a that is rotatably supported by the frame 14a, and a link 18 ( The clamp cylinder 16 is connected to the clamp cylinder 16 as an actuator via a cylinder (see FIGS. 2 and 4).

Here, the cam parts 55a to 55e are engaged with the base end side of the work clamp piece 51 to rotate (open and close) the work clamp piece 51, and are arranged in a state (phase) shifted by a predetermined rotation angle from each other. It is fixed to the rotating shaft 54a with a shifted position.
- (see Figures 2 and 5). Note that a motor other than the clamp cylinder 16 may be used as the actuator.

In the fabric gripping device described above, when the rotation shaft 54a f is rotated in one direction by the clamping cylinder 6, the cam portion 55a
55e to 55e rotate in the same direction and are sequentially ejected from the base end side of the work clamp piece 51. As a result, due to the spring force of the pi 53, the holding surface 511) of the clamping table 50 is
Clamping is performed by sequentially moving the work clamp pieces 51 so as to approach the side a (see FIG. 9).

Further, when the rotating shaft 54a is rotated in the other direction by the clamping cylinder 16, the cam portions 55a to 55e rotate in the same direction and are sequentially engaged with the base end side of the work clamp piece 51. As a result, the pressing surface 51 resists the spring force of the spring 53.
The presser clamp pieces 51 are sequentially rotated so that the part b is removed from the clamp base 50, and the clamp is released (see FIG. 8).

In this way, each presser foot clamp piece 5
1 is directly rotated (opened and closed), no lateral force is applied unlike conventional fabric gripping devices, and there is no fear that the workpiece 0 will shift. In addition, there is no possibility that "series" will occur in the portion of the bin 51 that rotatably supports the presser foot clamp pieces 51, and each presser foot clamp piece 51
1 opens and closes smoothly.

Further, by shifting the phase of the cam parts 55a to 55e, for example, the middle cam part 55c is first to engage or disengage from the other end of the presser clamp 51, and then the cam parts 551 on both sides thereof ], 55d is the work clamp 5
1, and finally press the cam portions 558, 55e or f of the presser clamp 51 at both ends.
When the end portion 11 is engaged or disengaged, the sliding cloth presser clamp 51 facing the cam portion 55c opens and closes first, and then the cloth presser clamp 51 facing the cam portions 55b and 55d opens and closes. Finally, the presser cylinder 51 facing the force 14 parts 55a and 55e can be opened and closed. Moreover, if the phases of the force-retaining parts 55a to 55e are made the same without being shifted, the work clamp 51 can be opened and closed at the same time. That is, the opening and closing order of the presser foot clamp 51 can be freely set by the phases of the openings 55a to 55e.

The shirring mechanism is constructed by arranging a plurality of shirring pins 52 which are removably inserted between the presser flang pieces 51 of the fabric gripping device. The shirring pin 52 is connected to the cylinder rod i5a of the shirring cylinder I5 via a link 17, and the shirring cylinder 17 moves the shirring pin 52 forward or backward. Furthermore, when the clamp is released, the shirring pin 52 is lifted by the claw portion 51c provided on the work clamp piece 51 (see FIGS. 6 and 7), but the shirring cylinder 17 causes the link 17 to When it rotates in the direction of arrow G shown in 611J, it comes off from the claw part 51c and the target I,
'1 product C-L (6th open-dotted chain line 9).

To apply shirring to the material to be sewn C, the edge of the lower fabric of the material to be sewn C is sewn onto the pressing surface 50a of the clamp table 50. Next, the shirring cylinder 15 is operated to place the shirring bin 52 on the bottom of the lower fabric. After that, set the upper cloth on the shirring bin 52 and press the clamp cylinder 16.
is operated to lower the presser clamp pieces 51 one after another, and clamp the lower and upper fabrics with the clamp base 50 and the presser clamp pieces 51 while holding the shirring bottle 52 between them. After doing this, when the shirring bin 52 is moved backward by the shirring cylinder 15, a moderate amount of shirring is applied to the upper fabric.
1 will be given. In this state, sewing is performed by the sewing mechanism 1.

Note that the shirring machine ID (fabric gripping device) installed in the knitting presser unit 27 and the shirring mechanism D (fabric gripping device) installed in the inner cloth presser unit 43 also have a presser foot clamp piece 51 and a shirring bin. The basic configuration is the same except for the number of wires 52, so the explanation will be omitted.

Also, the motor 60 for the left end presser unit 6
The cloth setting table is adapted to move toward and away from the left portion 10, and is equipped with a shirring mechanism on the presser foot 61 that applies shirring to the lateral portion of the collar of the workpiece C to clamp it. A presser foot unit 62 and a shirring fitll that applies shirring to the vertical part of the collar and clamps it.
The knitting presser unit 63 equipped with D and the sewing material G! Thing C
A knitting presser unit 64 equipped with a clamp mechanism for clamping the hem portion of the knitting cloth is disposed, and these side presser unit 62, knitting presser unit 63, and knitting presser unit 64 are also the right side presser unit. Since it has the same structure as No. 5, Thirst, its explanation will be omitted.

(Effects of the Invention) As explained above, according to the invention of claim (1), a cam member having a plurality of cam parts disposed at a position facing each fabric gripping part is rotated by an actuator, Since the gripping member of each fabric gripping section is configured to open and close,
There is no fear that the gripped fabric will shift, the opening/closing operation is smooth, and the opening/closing order of the fabric gripping part can be freely set by changing the phase of the cam part.

Further, according to the invention of Claim 81 (2), there is no fear that the gripped fabric will shift as in the invention of Claim (1), the opening and closing operations are smooth, and the phase of the force l1 portion is controlled. Since they are arranged in a staggered manner,
Multiple fabric grips arranged along the edges of the fabric can be sequentially opened and closed from the fabric grip located at one end to the fabric grip located at the other end, allowing for smooth shirring. can be done.

[Brief explanation of the drawing]

1 to 9 show one embodiment of the present invention, FIG. 1 is a plan view showing the entire automatic sewing machine, FIG. 2 is a partially omitted perspective view showing the fabric gripping device portion of the shirring mechanism, FIG. 3 is an explanatory partial side view showing the phase-shifted rock of the cam part, No. 4I2
1 is a side view of the shirring mechanism, FIG. 5 is an explanatory diagram illustrating the relationship between the rotation angle of the cam of the fabric gripping device part of the shirring mechanism and the presser clamp piece, and FIG. 6 is a side view of the shirring mechanism. 7121 is a side view illustrating the relationship between the presser foot flantz piece and the shirring pin; FIG. FIG. 9 is an explanatory diagram illustrating a clamped state of the fabric gripping device portion of the shirring mechanism. C... ・Workpiece E... ・Fabric gripping part F ・・Drive Ml structure 50... - Clamp base (gripping member) 51 - ・・
- Work clamp piece (gripping member) 53 - Spring 54 - Cam members 55a to 55e Cam part 16 Actuator (clamp cylinder 16) Cicada, 6 Concave horse a figure tail q figure

Claims (2)

[Claims] (1) Equipped with a plurality of fabric gripping parts that are arranged in a line along the edge of the fabric to grip and release the edge of the fabric, and a drive mechanism that independently operates the plurality of fabric gripping parts. and the fabric gripping part is constituted by a pair of gripping members that can be opened and closed to grip an edge of the fabric when closed and release the edge of the fabric when opened, and the drive mechanism is arranged opposite to each fabric gripping part. The cam member has a plurality of cam parts disposed at positions where the cam member engages with a gripping member when rotated to open and close the cam member, and an actuator that rotates the cam member. Fabric gripping device. (2) The cam member is configured to sequentially open and close a plurality of fabric gripping parts arranged along the edge of the fabric from a fabric gripping part located at one end to a fabric gripping part located at the other end. The fabric gripping device according to claim 1, wherein the cam portions are arranged with phases shifted from each other.