JP2001212390A - Fitting/removing device of embroidery fabric holding frame in embroidery sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fit or remove an embroidery fabric holding frame quickly at the replacement of a bobbin thread in an embroidery sewing machine and to firmly hold the position precision before a release even after the embroidery fabric holding frame is fitted again. SOLUTION: A plurality of coupling pins E and lugs F are arranged in parallel on the outside face of a holder D moved in the vertical direction in a carriage C, a groove 18 is carved at the middle of each coupling pin E, its tip section is formed into a drill shape, and each lug F is made lower than the coupling pin E. A connecting plate H is attached on one side face of the outer frame 2g of the embroidery fabric holding frame G, and connecting holes to be inserted with the coupling pins formed on the holder are bored on the connecting plate. A meshing plate is vertically slidably disposed between the connecting plate and an outer frame, and a spring wire is arranged below the meshing plate to invariably push the meshing plate upward. An action piece 25 is provided nearly at the center upper section of the meshing plate and protruded from the outer frame, a guide groove is formed at its lower section, and blade sections coupled with the grooves of the coupling pins and press sections facing the lugs are provided at both wings of the meshing plate in this fitting/removing device of the embroidery fabric holding frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer-controlled sewing machine which moves an embroidery cloth frame in XY directions based on information input in advance. When the bobbin thread is replaced, the embroidery cloth holding frame is quickly attached and detached, and even after the embroidery cloth holding frame is remounted, the positional accuracy before detachment can be firmly maintained. The present invention relates to a device for attaching and detaching an embroidery cloth holding frame.

[0002]

2. Description of the Related Art An earlier embroidery sewing machine has a cloth X.
There is no need to particularly hold the cloth in the frame because it does not have a structure to be moved in the Y direction by the control information. In recent years, as embroidery sewing machines have become more unmanned and robotized, cloths have been stuck to frames, and the cloths have been moved along with the frames based on information. With such a configuration, the embroidery operation can be performed continuously by increasing the input information in a continuous manner. However, on the other hand, since the length of the bobbin thread is limited, it is necessary to stop the machine at the time of shortage of the bobbin thread and perform the work of replacing the bobbin thread. However, since the embroidery cloth is in contact with the table covering the upper part of the lower thread bobbin, unless the embroidery cloth holding frame is removed, the cloth must be restored to the original position when restarting. Is difficult. If the cloth is not removed, the lower thread cannot be replaced at this time.

[0003]

When attaching and detaching the embroidery cloth holding frame, the attaching and detaching of the holding frame can be easily and quickly performed by women and girls. Also, the position of the embroidery cloth holding frame after mounting is exactly the same as the position before the holding frame was released,
There is no play in the connection fitting part, it is securely attached,
It is desirable that a state without play is maintained. As a result, the embroidery work efficiency is enhanced and the quality is maintained.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an inner end of a holder is locked to a vertical feed element component formed in a carriage, and a plurality of engaging members are provided on an outer surface of the holder facing the sewing machine body. The mating pin and the projection are projected in parallel. The tip of the engaging pin is sharpened in a conical shape, and a groove is formed in the middle body. The projection is adapted to project below the engagement pin.

[0005] The embroidery cloth holding frame is composed of an inner frame and an outer frame, and is adjustable so that when the inner frame is fitted to the outer frame, the periphery thereof is pressed. When attaching the cloth to the embroidery cloth holding frame, by arranging the embroidery point at the center of the upper surface of the outer frame, abutting the cloth, and pushing the inner frame into the outer frame from above,
The cloth is stuck to the lower surface of the embroidery cloth holding frame in close contact.

A connecting plate is fixed to the outer frame of the embroidery cloth holding frame which faces the outer surface of the holder. A locking plate and a striation line are interposed between the connecting plate and the outer frame, and the locking plate is urged upward by the striation line. The connecting plate has a connecting hole for fitting with an engaging pin protruding from the holder, and a window hole for avoiding the projection. An operation piece is provided substantially at the upper center of the engaging plate, and this operation piece projects above the outer frame. A guide groove is provided below the operation piece, and the guide groove is loosely fitted to a protruding portion provided on the outer frame, and is capable of sliding the locking plate up and down. Each of the two wings of the biting plate has a blade at the upper edge of the wing at a position facing the connecting hole of the connecting plate. A pressing piece is provided on the wing portion at a position facing the window hole of the connecting plate. The pressing piece is a tongue piece that is bent upward in a U-shape toward the window hole of the connecting plate,
It has a smaller shape than the window hole.

When the connecting hole of the connecting plate of the embroidery cloth holding frame having such a structure is directed toward the engaging pin projecting from the holder and the embroidery cloth holding frame is pressed toward the holder, the tapered portion at the tip of the engaging pin causes Then, the locking plate descends against the striation line, and the connecting plate is fitted to the base of the engaging pin. Since the groove provided in the middle of the engaging pin is exposed from the inner surface of the connecting plate to the outside, the blade portion of the engaging plate is urged by this groove to the striation line. Mesh with each other. Therefore, the embroidery cloth holding frame is attached to the outer surface of the holder in close contact with the holder, so that the embroidery cloth holding frame cannot be easily detached from the holder even when the embroidery cloth holding frame is pulled toward the sewing machine body.

In order to release the embroidery cloth holding frame attached in this manner from the holder, simply press the operating piece of the locking plate, which protrudes above the embroidery cloth holding frame, with a finger. When the blade of the locking plate is disengaged from the groove of the engaging pin, and the locking plate is further lowered, the bent tongue of the pressing piece of this plate is pressed against the projection provided on the holder. , The embroidery cloth holding frame is pushed out to the sewing machine main body side and detaches from the engaging pin. That is, the detachment operation of the embroidery cloth holding frame can be easily performed with one finger of one hand.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a drive mechanism for an embroidery cloth holding frame, in which a cover of a carriage is removed and an embroidery cloth holding frame is removed. 2 is a plan view in which the embroidery cloth holding frame is opposed to the embroidery cloth holding frame, FIG. 2 is a perspective view of the embroidery cloth holding frame, and FIG. FIG. 4
FIG. 5 is a front view for removing a part of the connecting plate fixed to the outer frame of the embroidery cloth holding frame to clearly show the inside, and FIG. 5 is LL of FIG.
7 is an enlarged side sectional view taken along a line, FIG. 6 is a front view of the entire sewing machine, FIG.
FIG. 7 is a plan view of FIG. In FIG. 6, A is a main body of the sewing machine, and 1 is a head projecting from the upper side of the main body. The head has a needle bar driving device for reciprocating up and down inside the front end, and locks the needle 3 at the lower end of the needle bar. A driving shaft 4 protrudes in a carriage C which is connected to a lower sewing machine 2 projecting to the lower side of the sewing machine main body A and is adapted to move laterally on a connection housing B. 5 is fixed. Drive gear 5
A drive pulley 8 is disposed on a shaft 7 of a driven gear 6 meshing with the driven gear 6, and the drive pulley 8 is configured to rotate integrally with the driven gear 6. A driven pulley 9 is provided in the vertical direction facing the driving pulley 8, and a toothed belt 10 is stretched between the driving pulley 8 and the driven pulley 9. The front and rear ends of the carriage C are bent upward, and the bent portions 11, 1
1 and a toothed belt 10 is interposed therebetween, and guide rods 12 and 13 are bent in parallel to the belt 10 to the left and right.
It is installed between 1 and 11. The holder D that moves in the carriage C in the vertical direction has its left outer end 14 held by the left guide bar 13, and the middle portion 15 of the holder D is fitted to the right guide bar 12, and Bent piece 16 provided between the portion 15
To the toothed belt 10. Engagement pins E, E are implanted at both end portions of the bent outer end face 17 of the holder D facing the sewing machine main body A, and projections F, F are projected between the engagement pins E, E. 19 has a conical shape, and the engagement pin E
A groove 18 is formed in the middle of the body.

On the other hand, the embroidery cloth holding frame G comprises an inner frame 1g and an outer frame 2g.
g on the outer frame 2g, a protruding portion 22 near the center of one side surface, and fastening holes 21, 21 for screwing the connecting plate H to the left and right with the protruding portion 22 interposed therebetween. Is provided. In the connecting plate H, a connecting hole 23 to be fitted with the engaging pins E, E,
Windows 23 and projections F, F, F are opened. Between the connecting plate H and the outer frame 2g, a locking plate K and a striation line S are interposed. The locking plate K is a plate having an operation piece 25 whose center is protruded upward, and a guide groove 26 which fits in the protrusion 22 of the outer frame 2g so as to be slidable up and down is provided below the operation piece 25. Cut out. Both wing ends of the biting plate K correspond to the portions corresponding to the connection holes 23 provided in the connection plate H. Blade portions 27 are provided at the wing ends, and window holes 24, 24 are provided inside the blade portions 27, 27. The pressing pieces 28, 28 are provided at portions corresponding to the above. The upper end of the pressing piece 28 is bent so as to approach the window hole 24, and the bent portion is set in a state of looking out from the window holes 24, 24 and abuts on the lower edge of the wing. The locking plate K is constantly pushed upward by the curved line of striation S arranged in this manner, and the operation piece 25 projects above the outer frame 2g.

An area to be embroidered on the cloth is disposed substantially at the upper center of the outer frame 2g, placed on the outer frame 2g, and after fitting the inner frame 1g into the outer frame 2g from above, the enlarging / reducing portion of the outer frame is set. 20 is tightened, and the cloth is stretched on the bottom surface of the embroidery cloth holding frame G. The embroidery cloth holding frame G is placed on the lower sewing machine housing 2 below the needle 3, and the connection holes 23 of the connection plate H screwed to the outer frame 2 g of the cloth holding frame G are engaged with the engagement protruding from the holder D. When the embroidery cloth holding frame G is pressed against the holder D side so as to face the pins E, E, the engaging pins E,
The conical portions of the tips 19, 19 of the E are fitted into the connection holes 23, 23, and are further deeply fitted while pushing down the locking plate K. When the connecting plate H comes into contact with the outer end face 17 of the holder D, the grooves 18, 18 of the engaging pins E, E face the wing end portions of the locking plate K. The biting plate K is pushed up by the repulsive force of the striation line S, and the blade portions 27 of the biting plate K are engaged with the grooves 1 of the engaging pins E, E.
8 and 18, the embroidery cloth holding frame G and the holder D are connected in close contact with each other. Therefore, even if the embroidery cloth holding frame G is pulled toward the sewing machine main body A, it does not easily come off.

When the embroidery cloth holding frame G attached in this manner is detached from the holder D, the operation piece 25 that is close to the holder D and protrudes upward from the embroidery cloth holding frame G is touched by a finger. When pressed down, the locking plate K descends against the elastic force of the striation line S, and the blade portions 27, 27 of the locking plate K are disengaged from the grooves 18, 18 of the engaging pins E, E. When the locking plate K is lowered, the bent tongues of the pressing pieces 28, 28 of the locking plate K press the projections F, F protruding from the holder D, so that the embroidery cloth holding frame G is attached to the sewing machine main body. It is pushed out to the A side and detaches from the engaging pins E, E. That is, the detachment operation of the embroidery cloth holding frame G can be performed extremely easily with one finger of one hand.

[0013]

As is apparent from the above description, the embroidery cloth holding frame attaching / detaching apparatus of the present invention has the following features.
On the outer end surface of the holder that moves longitudinally in the carriage on the side of the sewing machine body, a locking pin having a groove in the body and a projection are projected in parallel. On the other hand, on one side of the outer frame of the embroidery cloth holding frame,
A connecting plate that has a connecting hole to be fitted with the locking pin and a window hole through which the projection is opened is screwed in. A locking plate is slidable up and down between the connecting plate and the outer frame. A curved firing line is arranged to receive the lower edge of the plate, and the pressing plate is normally pushed upward. An operation piece is provided at the center of the biting plate and protrudes above the outer frame, and both wings of the biting plate are provided with a blade that engages with the groove of the locking pin and a pressing piece that presses the projection. ing. Because of such a configuration,
By simply pressing the embroidery cloth holding frame against the holder, the embroidery cloth holding frame is connected to the holder and is automatically locked. In addition, the operation of pushing out the embroidery cloth holding frame at the same time as the lock is released just by pushing the operation piece with the finger can be performed with one touch. As a result, the conventional problems can be solved well by the present invention.

[Brief description of the drawings]

FIG. 1 is a plan view showing a drive mechanism of an embroidery cloth holding frame according to the present invention, in which a cover of a carriage is removed, the embroidery cloth holding frame is detached, and the embroidery cloth holding frame faces each other.

FIG. 2 is a perspective view of the embroidery cloth holding frame of the present invention.

FIG. 3 is an exploded perspective view of a main part of the embroidery cloth holding frame according to the present invention, which is provided on an outer frame.

FIG. 4 is a front view for removing a part of a connecting plate fixed to the outer frame of the embroidery cloth holding frame of the present invention to clearly show the inside;

FIG. 5 is an enlarged side sectional view taken along line LL of FIG. 4 of the present invention.

FIG. 6 is a front view of the entire sewing machine of the present invention.

FIG. 7 is a plan view of FIG. 6 of the present invention.

[Explanation of symbols]

A: Sewing machine body, B: Connection housing, C: Carriage, D ...
Holder, E: engagement pin, F: protrusion, G: embroidery cloth holding frame,
1g: inner frame, 2g: outer frame, H: connecting plate, K: bite plate, S
... Striking wire, 1 ... Sewing machine head, 2 ... Sewing machine lower housing,
Reference numeral 3: sewing machine needle, 4: driving shaft, 5: driving gear, 6: driven gear, 7: driven gear shaft, 8: driven pulley, 9: driven pulley, 10: toothed belt, 11: bent portion of the carriage, 1
2 right guide rod, 13 left guide rod, 14 left outer end of holder, 15 middle part of holder, 16 bent piece fastened to toothed belt, 17 bent outer end face of holder, 18 Groove of engaging pin, 19: tip of engaging pin, 20: expanding / contracting portion of outer frame, 21: fastening hole, 22: projecting portion of outer frame, 23: connecting hole of connecting plate, 24: window of connecting plate Hole, 25 ... operation piece, 26 ...
Guide groove of the locking plate, 27: blade portion of the locking plate, 28: pressing piece of the locking plate,

Claims (1)

[Claims] 1. A plurality of engaging pins and projections are juxtaposed on an outer surface of a holder for reciprocating in a longitudinal direction in a carriage.
A groove is engraved in the middle of the engagement pin, and the tip is formed in a conical shape, and the projection is provided lower than the engagement pin. On the other hand, the embroidery cloth holding frame is composed of an inner frame and an outer frame, and a connecting plate is fixed to one side surface of the outer frame, and a connecting hole into which an engaging pin provided in the holder is fitted. Then, a window hole is opened at a position facing the projection. Between the connecting plate and the outer frame, a biting plate is slidably arranged up and down, and a striation line is disposed on the lower surface of the biting plate. Press An operating piece is provided substantially at the upper center of the pawl plate to protrude from the outer frame, and a guide groove is provided at the lower part. Each of the wings of the pawl plate engages with the groove of the engaging pin. An embroidery cloth holding frame in an embroidery sewing machine, comprising: