JPH0736869B2 - sewing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sewing machine for sewing a sewing piece such as a label or a name on a work cloth with both ends bent.

[Prior Art] Conventionally, as an apparatus of this kind, for example, the actual exploitation Sho 62-27579
There are those disclosed in the publication. That is, a presser foot that can move on the work cloth support surface in a horizontal plane that traverses the vertical movement path of the needle and that can move up and down on the work cloth support surface, and is always placed at a standby position distant from the presser foot. And a template provided with a restricting portion or an overhanging portion for positioning a sewing piece such as a label or a name on one side, and the template with the standby position and the feeding position below the presser foot. A first air cylinder for reciprocating between the presser foot and a supply position below the presser foot by the template, which is located on both sides of the presser foot in a direction orthogonal to the reciprocating direction of the first air cylinder. A pair of bent pieces for bending both ends of the sewing piece supplied around the mold plate around the template, and both ends of the sewing piece by moving the pair of bent pieces toward and away from the template. Secondary air for bending part It is and Linda are provided.

[Problems to be Solved by the Invention] According to the above-mentioned conventional technique, when the both ends of the sewing piece are bent before the sewing piece is sewn, the sewing piece is restrained on the template with the restriction portion or The position is controlled by the overhang. However, since the restricting portion and the overhanging portion are formed by fixed portions whose mutual positional relationship does not change, an inclined projecting piece-shaped guide portion must be specially formed at the inserting portion of the sewing piece, If the sewn piece is thick or the insertion end thereof is warped, the end of the sewn piece may come into contact with the inlet end face of the guide even if the guide is provided. The attached piece cannot be smoothly inserted and placed on the template. Further, when the sewing piece is thin, a gap is created between the upper surface of the sewing piece arranged on the template and the lower surface of the overhanging portion, and the sewing piece shifts on the template. There is a risk that it may be misplaced.

Therefore, according to the present invention, the sewn piece is fed on the feed plate, the feed plate is moved to the feeding position, and the sewn piece is fed until the both ends of the sewn piece are bent. As a result, it is an object of the present invention to provide a sewing machine which can always sew the sewing piece to a predetermined position of the work cloth so that the sewing position can be surely held at the predetermined position on the plate.

[Means for Solving the Problem] In order to achieve the above object, the present invention has a pressing piece for pressing and holding a sewing piece on the feed plate from above,
And a pressing portion body that is movable between an operating position where the pressing piece presses the sewing piece and an inactive position where the pressing piece does not press, and the feed plate is moved from the standby position to the supply position by at least the first operating means, And a third actuating means for drivingly arranging the pressing portion body at the working position until both ends of the sewing piece are bent by the second actuating means.

[Operation] According to the present invention having the above-described configuration, the sewing pieces such as labels and names are positioned and arranged on the feed plate, and the pressing portion body is operated by the third operation means, so that the pressing pieces can be used. The sewing piece is pressed from above and the sewing piece is pressed and held on the feed plate. In this state, the feed plate is moved to the feeding position below the cloth pressing plate by the first actuating means, and in this state, the pair of bent pieces are actuated by the second actuating means to move the sewing piece. Bend both ends at the ends of the feed plate. Thereafter, the pressing of the sewing piece by the pressing piece of the pressing portion is released, the feed plate is retracted to the original position, and the sewing piece is sewn to the work cloth.

[Embodiment] An embodiment in which the present invention is embodied in an electronically controlled cycle sewing machine will be described below.

A needle 2 is supported on a frame 1 of the cycle sewing machine so as to be vertically movable, and a bed 1a of the frame 1 has a needle hole 3 for the needle 2 and constitutes a work cloth supporting surface. A plate 4 is attached.

The cloth support plate 6 on which the work cloth 5 is placed traverses the vertical movement path of the needle 2 and is moved back and forth and left and right on the needle plate 4 in a horizontal plane. The movement is performed by an X-axis pulse motor and a Y-axis pulse motor driven according to the upper part of the electronic memory. Reference numeral 7 is a needle passage opening for forming the cloth support plate 6. The cloth pressing plate 8 includes the work cloth 5 placed on the cloth supporting plate 6 and the sewing pieces 9 such as labels and names which are sewn in a state where both ends of the work cloth 5 are bent.
It is for pushing up, can move integrally with the cloth support plate 6, and can move up and down with respect to the cloth support plate 6. The cloth pressing plate 8 is always given a cloth pressing force toward the cloth supporting plate 6 by the cloth pressing spring, and is lifted up against the action of the cloth pressing spring by a driving means such as a cloth pressing lifting solenoid. It Further, the cloth pressing plate 8 is supported by the reversible crankshaft 10, so that not only the both ends of the sewn piece 9 are sewn, but also the cloth pressing plate 8 is sewn.
A closed seam can be formed along the circumference of the.

The support frame 11 is fixed to the frame 1,
A pair of guide bars 12, 12 are fixed, and a support 13 is slidably supported on the guide bars 12, 12. 14 is a stopper composed of a screw shaft. Support piece integrated with the support 13
A lever 17 is rotatably mounted on a step 15 by a step screw 16, and a long hole 20 for fitting a roller 19 rotatably supported by a pin 18 on the support 13 is formed at the other end. Has been done. Further, a cylinder 21a of an air cylinder 21 is fixed to the support 13 and a rod 21b thereof is connected to an intermediate portion of the lever 17. The air cylinder 21 constitutes the first operating means.

Lower ends of a pair of guide rods 23, 23 are fixed to the support body 22, and upper ends thereof are slidably fitted into the support body 13, respectively. The connecting plate 24 is inserted and fixed to the pair of guide bars 23, 23. The cylinder 25a of the air cylinder 25 is fixed to the support 13 and the rod 25b thereof is fixed to the connecting plate 24.

An overhanging portion 22a is formed on the support body 22, and a feed plate 26 for placing the sewing piece 9 thereon is provided with a pair of flat head screws.
It is fixed at 27,27. The stepped portion between the main body of the support 22 and the overhanging portion 22a is formed as a positioning surface 22b for positioning the sewing piece 9 placed on the feed plate 26. Of course, this positioning portion may be provided directly on the feed plate 26.

The support shaft 28 is rotatably supported on the support body 22, and a pressing portion body 30 is fixed to the support shaft 28 with a screw 29. The pressing portion body 30 is attached to one side thereof. Three pressing pieces 30a for pressing and holding the sewing piece 9 on the feed plate 26,
30a, 30a are formed. The pressing body 30 constitutes a third actuating means.

A pinion 31 is fixed on the support shaft 28, and a rack 32 meshes with the pinion 31. Cylinder 33a of air cylinder 33
Is fixed to the support 22, and its rod 33b is integrated with the rack 32.

With reference to FIG. 3, a guide rod 34 is fixed to the frame 1, and a support 35 is slidably fitted on the upper end of the guide rod 34. A lower portion of the guide rod 34 is inserted and fixed to a mounting member 36 fixed to the frame 1, and a coil spring 37 is wound around the guide rod 34 between the mounting member 36 and the support body 35. Therefore, the support 35 is always urged upward. At both ends of the mounting member 36, a pair of rollers 3
8,38 are rotatably supported.

The upper ends of the pair of levers 39, 39 are rotatably supported by the step screws 40, 40, and the pair of bent pieces 42, 42 are fixed to the lower ends thereof by the screws 41, 41, 41, 41. The pair of levers 3
A coil spring 43 is stretched between 9 and 39 and always acts in a direction in which the pair of bent pieces 42, 42 are brought close to each other.
Further, inside the levers 39, 39, the cam portion 4 is
4,44 and the following cam portions 45,45 are formed.
The air cylinder 46 is capable of performing two-step operation,
It comprises a cylinder 46a fixed to the frame 1 and a rod 46b, and the tip of the rod 46b faces the upper end of the support 35. The rollers 38, 38, the coil spring 43, the cam portions 44, 45, etc. constitute a second actuating means.

Next, the operation will be described. First, in the initial state when the power is turned on, the state is as follows.

The cloth pressing plate 8 is in the raised position, the support 35 is raised by the coil spring 37, the cam portions 44, 44 of the levers 39, 39 engage the rollers 38, 38, and the pair of bent pieces 42, 42 is in a state of being opened in the left-right direction in FIG.

In addition, the rod 21b of the air cylinder 21 projects and the lever 17
The support body 13 is located at the left position in FIG. 1 via the support member 22, so that the feed plate 26 is located apart from the cloth pressing plate 8 via the support body 22 as shown in FIG. At the same time,
The rod of the air cylinder 25 is sucked upward, and the connecting plate 24,
Through the guide rods 23, 23 and the support 22, the feed plate is in the highest position. Further, the rod 33b of the air cylinder 33 is at the retracted position, and the pressing portion body 30 is provided via the rack 32 and the pinion 31.
Is rotated in the counterclockwise direction in FIG. 3, and its pressing piece 30a is in a position raised from the feed plate 26.

In order to sew the sewing piece 9 to the work cloth 5 in such a state, first, the work cloth 5 is placed on the cloth support plate 6 below the raised cloth pressing plate 8.

Next, the sewing pieces 9 such as labels and names are set on the feed plate 26. In this setting, the front end (left side in FIGS. 1 and 3) of the sewing piece 9 is engaged with the positioning surface 22b, and at the same time, both ends of the feed plate 26 of the sewing piece 9 (left and right in FIG. 4) are engaged. Direction) so that the amount of protrusion is even on the left and right.

After that, when the start switch of the sewing machine is depressed, first, the rod 33b of the air cylinder 33 is actuated to project, and the rack 3
2. The pressing portion body 30 is rotated in the clockwise direction in FIGS. 1 and 3 via the pinion 31, and the pressing piece 30b presses and holds the sewing piece 9 on the feed plate 26.

After this, the rod 25b of the air cylinder 25 is actuated to project, and the feed plate 2 passes through the connecting plate 24, the guide rods 23, 23, and the support plate 22.
6 is lowered to a substantially intermediate position between the cloth pressing plate 8 and the needle plate 4 at the highest position. In this state, the air cylinder
The rod 21b of 21 is retracted, and the lever 17 and the support 1
3, the guide rods 23, 23, and the support 22 are advanced to the right from the standby position in FIG. 1, and the feed plate 26 is located below the cloth pressing plate 8. In this state, the operation of the presser foot lifting drive is released,
The work clamp plate 8 is lowered onto the feed plate 26 by the action of the press spring, and the sewing piece 9 is pressed onto the feed plate 26.

Thereafter, the rod 46b of the air cylinder 46 is operated to project downward to a substantially intermediate position, and the tip end thereof engages with the upper end of the support body 35 to push down the support body 35 against the action of the coil spring 37. As a result, the levers 39, 39 also have a pair of bending pieces 42, 42.
With the cam portions 44,44 which are lowered together with the rollers 38,38 and are engaged therewith.
Slides, and the cam portions 45, 45 come to face the rollers 38, 38. As a result, the pair of bending pieces 42, 42 push the both ends of the sewing piece 9 downward, and then the coil spring 43 approaches the both ends so as to bend as shown in FIG. Is activated.

Thereafter, the air cylinder 33 is operated and the rod 33b thereof is retracted to release the pressing and holding of the sewing piece 19 by the pressing piece 30a, and then the air cylinder 21 and the air cylinder
25 are sequentially operated, and the feed plate 26 is moved up to the standby position and then raised.

A gap is created between the bent pieces 42, 42 and the cloth pressing plate 8 due to the retreat of the feed plate 26. However, since the cloth pressing plate 8 is acted by the cloth pressing spring, the distribution pressing plate 8 is provided. Falls.
Then, the rod 46b of the air cylinder 46 is operated for the full stroke, and the pair of bent pieces 42, 42 are lowered until they engage with the work cloth 5. Accordingly, the cloth pressing plate 8 is lowered by the cloth pressing spring. After that, the rod 46b of the air cylinder 46 is actuated upward, and the coil spring 37 causes the support body 35 and the levers 39 and 3 to move.
9 rises. The operation of the cam portions 44, 44 and the rollers 38, 38 returns the pair of bent pieces 42, 42 to the initial state.

After the sewing piece 9 is set in this manner, the sewing machine is started to operate, and the bent portions at both ends of the sewing piece 9 are sewn on the work cloth.

In the above embodiment, the air cylinder is used as the actuator, but the type of solenoid, motor, etc. is not limited.

[Advantages of the Invention] As described in detail above, the present invention has the above-described construction and function of the cloth pressing plate 8, the feed plate 26, and the first operating means.
21, a pair of bent pieces 42, 42, and second actuating means 38, 44, 45,
And a pressing piece 30a for pressing and holding the sewing piece 9 against the feed plate 26 from above, and the pressing piece 30a presses the sewing piece 9 Pushing part body 30 movable between the position and the non-pressing non-acting position
And at least the first actuating means 21 moves the feed plate 26 from the standby position to the supply position, and the second actuating means 38, 44, 45, 43 bend both ends of the sewing piece 9. Until then, the third actuating means 33 for drivingly arranging the pressing body 30 at the working position is provided.

Therefore, after the sewing piece 9 is arranged on the feed plate 26, the feed plate 26 is moved to the supply position below the cloth pressing plate 8,
Further, until the both ends of the sewing piece 9 are bent by the pair of bending pieces 42, 42, the sewing piece 9 is pushed to the pressing portion body 30.
Since the pressing piece 30a continues to press and hold it on the feed plate 26, the sewing piece 9 can be moved together with the feed plate 26 and the bent pieces 42, 42 can be moved.
The sewn piece 9 can be securely held in a predetermined position with respect to the feed plate 26 from the beginning without being displaced when the sewn piece is bent. 9 can be surely held regardless of the warp and thickness. As a result, the sewing piece 9 can always be sewn at a predetermined position on the work cloth accurately.

[Brief description of drawings]

1 is a perspective view of the whole, FIG. 2 is a front view showing a mechanism portion for bending a sewing piece, FIG. 3 is a sectional view taken along the line AA of FIG. 1, and FIG. It is an action explanatory view shown in the section in the BB line position of the figure. In the figure, 2 is a needle, 8 is a cloth pressing plate, 9 is a sewing piece, 21 is an air cylinder, 22b is a positioning part, 26 is a feed plate, 30 is a pressing part body, 30a is a pressing piece, 33 is an air cylinder, 38 is roller, 42
Is a bent piece, 43 is a coil spring, and 44 and 45 are cam portions.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideko Goto 3-19 Motomachi, Ono-shi, Fukui Prefecture Matsuya Sewing Equipment Sales Co., Ltd. Examiner Toshimasa Hirashiro (56) References: 62-27579 (JP, U) ) Japanese Patent Publication Sho 48-18040 (JP, B1)

Claims (1)

[Claims] 1. A presser foot plate (8) which can move on a work cloth support surface in a horizontal plane that traverses the vertical movement path of a needle (2) and can be raised and lowered on the work cloth support surface, and always A feed plate (26) arranged at a standby position farther from the work clamp plate (8) and provided with a positioning portion (22b) for positioning the sewing pieces (9) such as labels and names on one side. And the feed plate (26) to the standby position and the cloth pressing plate (8).
A first actuating means (21) for reciprocating between a lower supply position and both sides of the cloth pressing plate (8) in a direction orthogonal to the reciprocating direction by the first actuating means (21). For bending both ends of the sewn piece (9) supplied to the feed position below the cloth pressing plate (8) by the feed plate (26) around the feed plate (26). A pair of bent pieces (42,4
2) and a second bending piece (42, 42) for moving the pair of bending pieces (42, 42) toward and away from the feed plate (26) to bend both ends of the sewing piece (9). Actuating means (38,44,45,43)
A sewing machine provided with a pressing piece (30a) for pressing and holding the sewing piece (9) to the feed plate (26) from above, and the pressing piece (30
a) a pressing part body (30) movable between a working position where the sewing piece (9) is pressed and a non-working position where the sewing piece (9) is not pressed; and the feed plate (26) by at least the first operating means (21). ) Is moved from the standby position to the supply position and both ends of the sewing piece (9) are bent by the second actuating means (38, 44, 45, 43, etc.) until the pressing portion body is A third actuating means (3) for drivingly disposing (30) in the working position.
3) A sewing machine characterized by having and.