JP2734104B2 - Work cloth loading device for sewing machine - Google Patents

Description

The present invention relates to a work cloth loading device for a sewing machine.

[Prior Art] The present applicant previously arranged a work cloth placing table having a small width on a work cloth sending side of a work table on which a sewing machine main body was placed, and after finishing the sewing operation, on the work table sending side. One end of the hanging work cloth is sandwiched between one side of the work table by rotating the work cloth mounting table itself, and then, the other end of the work cloth is inverted and the work cloth mounting table is turned on. An improvement of a work cloth loading device of a type in which a work cloth is stacked in an inverted U-shape is provided as Japanese Patent Application No. 62-113096 (which has already been disclosed as Japanese Patent Application Laid-Open No. 63-277086). .

[Problems to be Solved by the Invention] However, in such a known work cloth loading device, a work cloth having a large cloth thickness, for example, as shown in FIG. In the case of the half-processed front work cloth K, since the work cloth is thick, the work cloth is bent in an inverted U-shape on the work cloth mounting table having a small width of the work cloth K, and is not loaded. The loading platform slipped down and could not be loaded reliably.

In addition, the work cloth K of the front body is formed by sewing a pocket piece on a part which has been assembled and sewn on the front and front wings.

In view of the above, an object of the present invention is to provide a work cloth loading device suitable for stacking work cloths having a large cloth thickness.

Means for Solving the Problems In order to achieve the above object, according to the present invention, a workbench on which a sewing machine main body is mounted, and a workbench supporting surface of the workbench are provided with one horizontal plane below a workbowl sending side. A holding plate that is swingably supported around an axis, and the holding plate is swung from a holding position for holding one end of the work cloth hanging from the work cloth support surface after sewing is completed and the holding position. A first cylinder that swings between the retracted positions, a pressing plate for pressing and holding one end of the work cloth against the holding plate, and the pressing plate being separated from the holding position. A second cylinder operated between a release position, a reversing means for reversing the other end of the work cloth held by the holding plate and the pressing plate, and a work cloth inverted by the reversing means Flat or With a wide work cloth mounting table for mounting in a state close to
After the other end of the work cloth is placed on the work cloth mounting table, the pressing plate is moved to a release position by operating the second air cylinder, and the first air cylinder is operated by operating the first air cylinder. The holding plate is swung to a retracted position away from one end of the work cloth.

[Operation] For this reason, one end of the work cloth hanging from the work cloth support surface after finishing the sewing enters between the holding plate and the pressing plate, and thereafter, the pressing plate is moved to the holding position by the second air cylinder. Is gripped by Next, the work cloth is securely placed on the work cloth mounting table one by one by inverting the other end on the side opposite to the gripped side by the reversing means, and thereafter, the second air cylinder The press plate is moved to the release position by the operation, and the holding plate is swung to the retreat position, which is a direction away from the end of the work cloth that has been gripped, by the operation of the first air cylinder, thereby reliably processing the gripped work cloth. Place it on the cloth mounting table.

[Embodiment] An embodiment in which the present invention is embodied in an automatic sewing machine for sewing pocket pieces on a body or the like called a pocket setter will be described below.

On a worktable 2 on which a work cloth support plate 1 constituting a work cloth support surface 1a is fixed upward, a sewing machine main body 3 is placed by a pulse motor (not shown) so as to be movable in the YY direction in FIG. Have been. On the left side of the work table 1, a pocket folding machine 4 for folding the green of the pocket piece and setting it on the front body is arranged. The work cloth K composed of the set front body and the pocket piece is: The workpiece is moved to a needle drop point position of the sewing machine main body 3 by a work cloth pressing plate 5 which is moved by a pulse motor (not shown) on the work cloth support surface 1a in an XX direction orthogonal to the YY direction by a pulse motor (not shown).

A U-shaped mounting frame 6 having an open upper side is fixed on the right front portion of the work cloth support plate 5, and one support shaft 7 is rotatably supported between the open ends. A pair of support arms 8, 9 are fixed to both ends. A roller shaft 11 to which a cloth feed roller 10 for feeding the work cloth K is fixed is rotatably supported between the free ends of the pair of support frames 8 and 9. A forward / reverse rotation air cylinder 12 is fixed on the support arm 9, and a piston rod 12 a thereof is operatively connected to the roller shaft 11 via a rack 13 and a pinion 14. The pair of support arms 8, 9 are connected to a lifting air cylinder (not shown) to move the cloth feed roller 10 between a processing position where the cloth feeding roller 10 can be engaged with the work cloth K and a lifting position separated therefrom. Move to

A mounting plate 15 is fixed to one side of the worktable 2 on the side of a sewing machine worker (a cloth feeding side by the cloth feeding roller 10), and four mounting legs 16, 17, 18, and 19 are fixed. 3 in
A single support shaft 20 is rotatably supported by the mounting legs 16, 17, 18, and a pair of U-shaped support arms 21, 21 are attached to the support shaft 20.
Is fixed at one end, and a holding plate 22 is attached between the other ends. A pressing plate 23 is disposed at a position facing the holding plate 22, and the pressing plate 23 is formed of a pair of pressing plate air cylinders 24, 24 (second air cylinders) mounted on the mounting plate 15. It is attached to the piston rods 24a, 24a. The holding plate 22, the pressing plate 23, and the like are arranged below the work cloth sending surface of the work cloth support surface 1a of the work table 2, and finish sewing and hang down from one side of the work cloth support surface. One end Ka of the work cloth K is sandwiched and held. Reference numeral 25 denotes an inclined guide plate having an upper end fixed to the mounting plate 15 and located between the holding plate 22 and the pressing plate 23 when the lower end is at the release position.

A support shaft 26 is rotatably supported at the free end of the mounting leg 19, and a support arm 27 is fixed at the tip of the support shaft 26.The other end Kb of the work cloth K is provided at an intermediate portion of the support arm 27. A reversing section 28 for reversing is fixed, and a piston rod 29a of a reversing air cylinder 29 mounted on the mounting plate 15 is connected to the tip of the reversing section 28.

Reference numeral 30 denotes a wide work cloth mounting table for mounting the work cloth K inverted by the reversing means in a flat state or a state close to the work cloth K. The work cloth K is formed by bending a plate material into a U-shape. Mounting base body 31 including a horizontal plate portion 31a for mounting, and a pair of upright plate portions 31b, 31b standing upright from both sides thereof;
It comprises a leg 32 of the book and a cloth retaining plate 33 fixed to the horizontal plate 31a of the mounting table main body 31. The cloth retaining plate 33 is composed of a lower plate 33a fixed to the horizontal plate portion 31a, and an upper plate attached to the lower plate 33a so that the vertical position can be adjusted by a plurality of screws and long holes as is apparent from the figure. 33b.

Further, the base end of the swing arm 34 is fixed to the support shaft 20,
Its free end is the piston rod of the retraction air cylinder 35 (first air cylinder) mounted on the mounting plate 15.
Connected to 35a. This evacuation air cylinder 35
The holding plate 22 is always kept at the position shown in FIGS. 1 and 7 to 10, and the other end Kb of the work cloth K is placed on the work cloth mounting table 30, as shown in FIG. After being placed, the holding plate 2
2. With the holding operation by the pressing plate 23 released, the holding plate 22 is swung in a direction away from the one end Ka side of the work cloth K.

A guide plate 36 having a shape shown in the figure is attached to the lower surface of the support arm 8 so as to be located near one side of the work cloth support surface 1a on the work cloth sending side. The guide plate 36 is mounted by mounting the right end of the guide plate 36 on the lower surface of the support arm 8 and by attaching a fitting piece fitted to the air ejection pipe 37 fitted and fixed to the boss 8 a of the support arm 8. Installed with 38. As shown in FIG. 5, the leading end of the guide plate 36 hangs down at the lowered position where the cloth feed roller 10 engages with the work cloth K to move one end Ka of the work cloth K on the cloth feed side. It is formed in a curved shape so as to guide between the holding plate 22 and the pressing plate 23 at the release position. At the same time, at the left end of the guide plate 36, even when the work cloth K is guided to the sewing position from the folding machine 4 side even in a flat state, the one end Ka is connected to the guide plate 36 by the work. An inclined guide portion 36a and an inclined guide surface 36b are formed so as to be guided between the cloth support surface 1a and the one end Ka in a bent state.

On the lower surface of the air ejection pipe 27, there are seven air ejection holes.
37a are formed, and an opening 36c is formed at the position of the guide plate 36 corresponding to them. This helps the work cloth K bend.

Next, when the pocket is folded by the pocket folding machine 4, the cloth feed roller 10 and the guide plate 36 are actuated by the action of the lifting air cylinder.
1, the holding plate 22 is also at the advanced position shown in FIG. 1, the pressing plate 23 is retracted, and the reversing rod 28 is also at the retracted position below the work cloth support plate 1.

When the folding is completed from this state, the work cloth pressing plate 5 moves to the left in FIG. 2 and goes to pick up the folded work cloth K. When the work cloth K is carried to the sewing position, sewing is performed. Be started. At this time, even if the work cloth K is thick and flat, the one end Ka of the work cloth K is forcibly bent by the inclined guide surface 36b of the guide plate 36. It is surely guided below the guide plate 36.

At the time of sewing, movement of the sewing machine body 3 in the Y-Y direction;
When the pressing plate 5 is simultaneously moved in the X-X direction and the sewing is completed, the lifting air cylinder is operated to rotate the pair of support arms 8 and 9 counterclockwise in FIG. Roller 1
0 is dropped onto the sewn work cloth K and guide plate 3
6 is also lowered to the position shown in FIG. 5, and even if the work cloth K is thick, one end Ka of the work cloth K is forcibly bent. At the same time, the piston rod 12a of the air cylinder 12 for forward / reverse rotation protrudes, and the cloth feed roller 10 is rotated in the direction of feeding the work cloth K via the rack 13 and the pinion 14. At this time, air is also jetted from the air jet pipe 37, and the one end Ka of the work cloth K tends to hang down from the work cloth support surface 1a.

In such a state, the work cloth K is sent out, and when one end Ka thereof reaches between the holding plate 22 and the pressing plate 23 as shown in FIG. 8, the air cylinder 24 for the pressing plate is operated. Then, the piston rod 24a is projected, and the pressing plate 23 presses and holds the one end Ka as shown in FIG. Thereafter, the piston rod 29a of the reversing air cylinder 29 is operated to protrude, and the reversing rod 28 is largely rotated from the position shown in FIGS. 1 and 9 to the position shown in FIG. As a result, the other end Kb of the work cloth K is inverted, and the horizontal plate portion 31a of the mounting table main body 31 of the work cloth mounting table 30 in a state of straddling the cloth retaining plate 33 as shown in FIG. Placed on top.

Thereafter, as shown in FIG. 11, at the same time when the reversing rod 28 is returned, first, the air cylinder 24 for the pressing plate is operated to retract the piston rod 24a, and the pressing plate 23 is detached from the holding plate 22. Then, the holding operation of the one end Ka of the work cloth K is released. Subsequently, the evacuation air cylinder 35 is operated, and the holding plate 22 is rotated together with the support arms 21 and 21 together with the support shaft 21, and is withdrawn from one end Ka of the work cloth K. It is mounted on the mounting table main body 31. When the holding plate 22 is retracted, the cloth hooking plate 33 is in contact with the one end Ka of the work cloth K due to friction.
11 acts as a resistance to the work cloth K when it is pulled to the right in FIG. 11, and prevents the work cloth K from slipping off the work cloth mounting table 30. However, the cloth retaining plate 33 basically operates even if it is not installed, and is sufficiently effective.

In the above embodiment, one end Ka of the work cloth K is
The guide plate 36 is used to guide the work cloth loading means including the holding plate 22, the pressing plate 23, etc., but when the work cloth K is fed out, the work cloth is actuated by a member operated by an actuator. Various forms can be considered, such as pressing K, all of which are effective.

[Effects of the Invention] As is clear from the above description, the present invention terminates sewing and ends one end of the work cloth hanging from the work cloth support surface between the holding plate and the pressing plate. By moving the pressing plate to the holding position by the air cylinder, the other end of the other side opposite to the gripped side is inverted by the inverting means, so that the work cloth can be reliably loaded on each work cloth. After being placed on the mounting table, the pressing plate is moved to the release position by the operation of the second air cylinder, and the holding plate is moved away from the end of the work cloth that has been gripped by the operation of the first air cylinder. Since the work cloth is released by swinging to the position, the work cloth can be reliably placed on the work cloth mounting table even if the cloth thickness is large.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a main part of the present invention, FIG. 2 is a perspective view of an automatic sewing machine to which a work cloth loading device of the present invention is added, and FIG.
FIG. 4 is a front view showing a guide plate portion, FIG.
The figure is a left side view of the same, FIG. 6 is a view showing an example of the work cloth K, and FIGS. 7 to 11 are operation explanatory views. In the figure, 1a is a work cloth support surface, 2 is a work table, 3 is a sewing machine main body, 10 is a cloth feed roller, 22 is a holding plate, 23 is a pressing plate, 28 is a reversing bar, 30 is a work cloth loading table, and 31 is The mounting table main body, 33 is a cloth retaining plate, 36 is a guide plate, and 37 is an air ejection pipe.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-91993 (JP, A) JP-A-61-164589 (JP, A) Fully open 1984-22673 (JP, U) Really open Showa 55- 161462 (JP, U)

Claims (1)

(57) [Claims] A work table on which a sewing machine main body is mounted, a holding plate supported swingably around one horizontal axis below a work cloth sending side of a work cloth support surface of the work table, and a holding plate thereof A first air cylinder that swings the plate between a holding position for holding one end of the work cloth that is sewn and hangs down from the work cloth support surface and a retracted position that is swung from the holding position; A pressing plate for pressing and holding one end of the work cloth against the holding plate; a second cylinder for operating the pressing plate between the holding position and a release position apart therefrom; Reversing means for reversing the other end of the work cloth held by a plate and the pressing plate; and wide processing for placing the work cloth inverted by the reversing means in a flat or close state. With the cloth mounting table After the other end of the work cloth is placed on the work cloth mounting table, the second air cylinder is actuated to move the pressing plate to the release position and to move the first air cylinder. A work cloth loading device for a sewing machine, wherein the holding plate is swung to the retracted position away from one end of the work cloth by an operation.