JPH08246324A - Embroidery frame-holding scheme for embroidery machine - Google Patents

Abstract

PURPOSE: To provide an embroidery frame-holding scheme ensuring embroidery frame-mounting position to be changed easily. CONSTITUTION: An embroidery frame made up of an inner frame 12 and an outer frame 13 is held by a pair of left and right holding plates 14L, 14R. These plates are each made by mutually sticking back to back an upper plate 15 and a lower plate 16 each bent so as to present U-shaped section, and the inside of the front of the upper plate 16 is fitted with a member 17 to mount the embroidery frame on. The right holding plate 14R is fixed on the upper surface of a frame driving body 1 in such a state that the contact part at the rear end of the plate 14R lies in contact with the front edge of the frame driving body 1. The left holding plate 14L is held on screws 25, 26 fixing the two engaging holes provided in the rear of the plate 14L on the frame driving body 1 and also detachably fixed on the body 1 through a clamping mechanism set up in front of the engaging holes.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for holding an embroidery frame of an embroidery sewing machine, and more particularly, to a mounting position of the embroidery frame which can be easily changed when the embroidery frame is mounted on the frame driving member in the embroidery sewing machine. The present invention relates to an embroidery frame holding structure.

[0002]

2. Description of the Related Art An embroidery frame in an embroidery sewing machine is detachably attached to a frame driving body which is freely driven in the X direction and the Y direction through a required holding member.
The holding members are for supporting both sides of the embroidery frame, and the holding members are generally fixed by screws to the frame driving body. However, since there are various sizes of the embroidery frame, it is necessary to change the mounting position of the holding member to the frame driving body depending on the size of the embroidery frame. In this case, the screw fixing the holding member has to be removed each time, which is inconvenient for setting up the embroidery frame.

[0003]

Therefore, a structure disclosed in, for example, Japanese Patent Laid-Open No. 6-316856 is proposed as a structure in which the mounting position of the holding member with respect to the frame driving member can be easily changed. In the technique disclosed in the publication, a positioning pin is provided on the frame driving body, and a notch capable of engaging with the positioning pin is provided on the holding member, and the positioning pin is engaged with the notch to perform lateral positioning. Is configured. Further, a wedge member is provided on both the holding member and the frame driving body and a clamp mechanism is provided, and the clamp mechanism pushes the holding member rearward to engage both wedge members, whereby the front-back direction of the holding member is increased. Also, the vertical positioning and locking are performed.

Therefore, the position of the holding member can be easily changed by locking and unlocking the holding member.
On the other hand, it is necessary to perform special processing for positioning in the front-rear direction and the vertical direction on both the holding member and the frame driving body, which disadvantageously increases the number of steps and increases the cost. Further, in order to fix the holding member to the frame driving body such that the holding member cannot rotate in the left-right direction, two positioning pins are provided on the frame driving body at required intervals in the left-right direction, and the holding member is engaged with the two positioning pins. It is necessary to provide a mating engaging portion for each. For this reason, the mounting width of the holding member with respect to the frame driving section must be increased, and it becomes difficult to set the pitch of the positioning pins provided on the frame driving body small. Therefore, it is necessary to finely adjust the mounting position of the holding member. It is pointed out that it is impossible to do this.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks inherent in the above-mentioned prior art, and is proposed in order to solve the above-mentioned disadvantages. When the embroidery frame in an embroidery sewing machine is attached to a frame driving member, An object of the present invention is to provide an embroidery frame holding structure whose attachment position can be easily changed.

[0006]

SUMMARY OF THE INVENTION In order to overcome the above-mentioned problems and achieve an intended object, the present invention is to attach and detach an embroidery frame to a frame driving body which is freely driven in the X and Y directions in a plane. In an embroidery frame holding structure of an embroidery sewing machine which is movably attached, a plurality of pairs of frame holders arranged on the upper surface of the frame driving body and holding the embroidery frame are arranged in a direction intersecting the frame driving body. A positioning pin for positioning so as to extend,
A pair of engaging portions that are respectively provided on the frame holding bodies, that are capable of engaging with the pair of positioning pins, and abutting portions that can abut the frame driving body or the positioning pins; A clamp mechanism capable of elastically holding the abutting portion against the frame driving body or the positioning pin at the time of locking, and a pair of the positioning pin and the engaging portion when clamped by the clamp mechanism. The left and right movements and the front-rear movements of the frame holding body with respect to the frame driving body are restricted by the engagement of.

[0007]

The frame holder can be securely attached to the frame driver by a simple operation in which the pair of engaging portions of the frame holder are engaged with the positioning pins of the frame driver and locked by the clamp mechanism. Easy to do. Further, the frame holding body can be quickly removed from the frame driving body simply by releasing the lock by the clamp mechanism.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embroidery frame holding structure for an embroidery sewing machine according to the present invention will be described below with reference to the accompanying drawings, with reference to a preferred embodiment. FIG. 1 shows a table 2 of the embroidery sewing machine in a planar state, and a frame driving body 1 to which an embroidery frame 11 to be described later is attached is driven in the Y direction by a Y direction driving unit 3 provided on the lower surface of the table 2. Has become. Further, the frame driving body 1 is driven in the X direction by an X direction driving plate 6 which is also connected to an X direction driving portion 5 provided on the lower surface of the table 2. Then, by driving the drive motors (not shown) provided individually in the drive units 3 and 5 based on the embroidery data stored in the control block, the frame drive body 1 is given a combined movement in the X and Y directions. To be done. The frame driving body 1 is supported on a cylindrical sewing machine bed 7 (four in total) provided so as to project from the front portion of the table 2, and an embroidery frame 11 described later is provided on the upper surface of each corresponding sewing machine bed 7. It is moved in the X and Y directions.

A needle plate 10 having a needle hole 8 is attached to the upper surface of the front end of each sewing machine bed 7, and a well-known hook is provided below the needle plate 10.
(Not shown) is installed. Then, by the cooperation of the sewing needle at the lower end of the needle bar supported by the sewing machine head (not shown) located above the needle plate 10 and the hook, the lock stitch type sewing is performed. In front of the frame driving body 1, as shown in FIG. 8, an embroidery frame 11 composed of an inner frame 12 and an outer frame 13 is provided with a pair of left and right holding plates 14L and 14L.
It is held by R. These holding plates 14
L and 14R are formed by fixing back and back together a lower plate 16 formed by bending a steel plate into a U-shaped cross section on the lower surface of an upper plate 15 formed by bending a steel plate into a U-shaped cross section. The lower plate 16 is set to be shorter than the upper plate 15, and its rear end serves as an abutting portion 16a described later. Upper plate 15
The inner ribs of both the lower plate 16 and the lower plate 16 are notched in the front part, and a mounting member 17 for mounting the embroidery frame 11 is mounted on the upper surface of the upper plate 16. The right side holding plate 14R causes the rear end contact portion 16a of the lower plate 16 to contact the front end edge 1a of the frame driving body 1, and the rear end portion of the upper plate 15 by the screws 18 and 18. It is fixed to the upper surface of 1.

On the other hand, the holding plate 14L located on the left side
As shown in FIG. 3, the rear part of the
Zeros are bored at predetermined intervals in the front and rear, and a clamp mechanism 21 is attached in front of the engagement hole 20 on the rear side. The clamp mechanism 21 is referred to as a so-called "sling lock", and in particular, as shown in FIG. 5, a screw 35 is provided on the upper surface of the holding plate 14L.
And a lever 37 rotatably supported on the base body 36 via a pin 38, and the lever 37.
Basically, it is composed of a spring steel wire hook 40 pivotally attached to the base of the above. 3, the engaging hole 20 is composed of a circular hole 22 and a circular hole 23 which is connected to the front portion of the circular hole 22 so as to have a smaller diameter than the circular hole 22. Parallel edges 24 are formed.

As shown in FIGS. 2 and 5, on the upper surface of the mounting position of the holding plate 14L (left side) in the frame driving body 1, a pair is formed at the same spacing as the spacing between the engaging holes 20 of the holding plate 14L. Two positioning pins 25,26
However, a plurality of pairs (in this embodiment, 2 pairs in the longitudinal direction of the frame driving body 1
Vs) installed. Each positioning pin 25 (26)
A screw portion 27 threaded to the lower end side of the pin main body, a hexagonal spanner hooking portion 28 formed substantially in the middle of the main body, an engaging shaft portion 30 provided on the upper end side of the main body, and the engaging shaft portion. And a flange 31 integrally formed on the top of 30. The circular hole 22 on the large diameter side of the engagement hole 20 of the holding plate 14L (14R) is set to a dimension that allows the flange 31 to be inserted therethrough, and the width of the parallel side edges 24 of the engagement hole 20 facing each other. Is set to be the same as the shaft diameter of the engaging shaft portion 30. Further, the upper surfaces of the spanner hooking portion 28 and the frame driving body 1 are set to have the same surface height so that they function as the receiving surfaces 28a when the holding plates 14L (14R) are attached. Has become. Further, the lower surface of the flange 31 is a contact surface 31a, and the frame driving body 1
The distance between the upper surface of the and the receiving surface 28a and the contact surface 31a is
The plate thickness of the upper plate 15 of each holding plate 14L (14R) is the same.

The flange 31 of the rear positioning pin 26
5, the thickness is set to be large, and the ring groove 32 is formed on the side peripheral surface thereof. Further, the respective positioning pins 25 (26) are used for the frame driving body 1.
Is fixed by screwing a screw portion 27 into a screw hole (see FIG. 5) formed in the front surface of the front surface 1b and the rear surface of the rear surface 1c. Is the same as the height of the upper surface of the frame driving body 1.

Next, the operation of the embroidery frame holding structure according to the embodiment, that is, the procedure for attaching the holding plate 14L to the frame driving body 1 will be described. First, the large-diameter circular hole 22 of each engaging hole 20 in the holding plate 14L is made to correspond directly above each positioning pin 25 (26) of the frame driving body 1, and the holding plate 14L is framed while maintaining a horizontal posture in that state. It is placed on the upper surface of the driving body 1 and then pushed backward. Then, the parallel edge 24 of each engagement hole 20 sneaks into the lower surface of the flange 31 of each positioning pin 25 (26). Then the clamp mechanism 21
The free end of the hook 40 at
And the lever 37 of the clamp mechanism 21 is pushed down. As a result, the holding plate 14L is pulled rearward by the elastic force of the hook 40, and the contact portion 16a thereof comes into contact with the front end edge 1a of the frame driving body 1. In this way, the clamp mechanism 21 locks the front and rear positions of the holding plate 14L. Further, the parallel side edge 24 of each engaging hole 20 sneaks into the lower surface of the flange 31 of the corresponding positioning pin 25 (26), so that the upper surface of the frame driving body 1 and the receiving surface 28a and the contact surface 31a are provided. Vertical movement is restricted. In addition, the parallel edge 24
However, the movement of the holding plate 14L in the left-right direction is regulated by tightly fitting the positioning shafts 25 (26) to the engagement shaft portions 30. That is, by locking with the clamp mechanism 21, the holding plate 14L can move forward and backward, left and right,
And the frame drive unit 1 in a state in which the vertical movement is restricted.
Can be securely attached to.

[0014]

[About the mounting members] And the holding plates 1 that make up each pair
To attach the embroidery frame 11 between the 4L and 14R, the left and right connecting plates 50 of the embroidery frame 11 are attached to the holding plates 14L and 1L.
They are mounted on the tip portions of 4R and then mounted by the mounting member 17. Therefore, regarding the mounting member 17, FIG.
Will be described with reference to. Each holding plate 14L (14
A pressing plate 51 made of a spring steel plate is attached to the tip of R) by a screw 53 via a spacer 52.
The lower surface of the pressing portion 51a formed at the free end of 1 is the upper plate 15
Is elastically in contact with the upper surface of the. The connecting plate 50 of the embroidery frame 11 is provided on the front edge of the spacer 52.
Is formed with a recess 52a into which the front edge of can be tightly fitted. A stopper 54 is fixed to the upper surface of the tip of the upper plate 15.

The tip edges of the left and right connecting plates 50 of the embroidery frame 11 are pushed under the inclined portion 51b at the tip of the pressing plate 51 and pushed backward, and the tip edges are recessed in the spacer 52.
Insert into 2a. Then, the pressing portion 51a of the pressing plate 51 is
Fits into the engaging holes 50a formed in the connecting plate 50, and the rear end edge of the connecting plate 50 engages with the rear end edge of the stopper 54, whereby both connecting plates 50 are held.
It is attached in a state of being positioned with respect to 4L and 14R. When the embroidery frame 11 is removed, it can be easily removed by lifting the front part of the embroidery frame 11 a little and detaching the front end edges of the two connecting plates 50 from the rear end edges of the stoppers 54 and pulling them toward you.

Depending on the size of the embroidery frame 11 used,
It is necessary to change the distance between the left and right holding plates 14L and 14R. In this case, the mounting position of the left holding plate 14L with respect to the frame driving body 1 is changed. That is, in order to make this change, the lever 37 of the clamp mechanism 21 in the holding plate 14L is raised to release the lock (shown by the chain double-dashed line in FIG. 5), and the holding plate 14L is pulled toward the front and back. The large-diameter circular holes 22 (22) are aligned with the positioning pins 25 (26) and lifted to remove them from the frame driving body 1. Another pair of front and rear positioning pins 25, 26
For the above, also follow the same procedure as above.

When the upper surface of the frame driving body 1 constitutes the receiving surface as in this embodiment, the positioning pins 25,
The receiving surface 28a by the spanner hooking portion 28 of 26 is not always necessary. In the present embodiment, only the left holding plate 14L can be changed in mounting position, but both holding plates 14L and 14R can be changed or only the right holding plate 14R can be changed. May be. Further, in this embodiment, the holding plate 1
The positioning of 4L in the front-rear direction is performed by contact between the contact portion 16a and the frame driving body 1. Therefore, when the load from the embroidery frame 11 acts on the front portion of the holding plate 14L, the holding plate 14L is pressed. Is advantageously prevented from bending near the front edge of the frame driving body 1. However, the invention is not limited to this, and the front edge of any one of the circular holes 23 of the engaging hole 20 and the engaging shaft portion 30 of the positioning pin 25 (26) may be brought into contact with each other so as to be restricted. Good.

[0018]

As described above with reference to the embodiments, according to the embroidery frame holding structure of the embroidery sewing machine of the present invention, the frame holder can be easily attached to and detached from the frame driving body.
The work of changing the mounting position of the frame holder, which is required according to the size of the embroidery frame, can be quickly performed, and the efficiency of the embroidery work by the embroidery sewing machine can be improved. Further, when the frame holding body is attached to the frame driving body, the horizontal and vertical positioning of the frame holding body is performed by the engagement of the pair of engaging portions and the positioning pin, which simplifies the positioning structure and reduces the manufacturing cost. Is reduced. Further, since the pair of positioning pins provided on the front and rear of the frame driving body and the pair of engaging portions of the frame holding body are engaged with each other, the width of the frame holding body can be set to be small in the lateral direction. Since a pair of positioning pins can be provided in the frame driving body in the lateral direction at a small pitch, there is also an advantage that the position change of the frame holding body can be finely adjusted.

[Brief description of drawings]

FIG. 1 is a plan view of an embroidery sewing machine in which an embroidery frame holding structure of the embroidery sewing machine is implemented.

FIG. 2 is an enlarged plan view showing a state in which a holding plate is attached to a frame driving body.

FIG. 3 is a plan view of a holding plate.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

FIG. 5 is an enlarged cross-sectional view showing how the holding plate is attached to the frame driving body.

FIG. 6 is an enlarged sectional view taken along line BB of FIG.

FIG. 7 is an enlarged cross-sectional view taken along line CC of FIG.

FIG. 8 is a perspective view showing how the embroidery frame is attached to the holding plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Frame drive body 11 Embroidery frame 14L Holding plate (frame holding body) 16 Lower plate (reinforcing member) 16a Contact part 20 Engagement hole 21 Clamping mechanism 22 Large diameter circular hole 23 Small diameter circular hole 25,26 Positioning pin 28a Receiving surface 31 Flange 31a Abutting surface

Claims (5)

[Claims] 1. An embroidery frame holding structure of an embroidery sewing machine, wherein an embroidery frame (11) is detachably attached to a frame driving body (1) which is freely driven in an X direction and a Y direction in a plane. Arranged in a plurality of pairs on the upper surface of the frame driving body (1),
The frame holder (14) for holding the embroidery frame (11) is the frame driver.
Positioning pins (25, 26) for positioning so as to extend in the cross direction with respect to (1), respectively provided on the frame holding body (14), engageable with the pair of positioning pins (25, 26) A pair of engaging parts (20, 20) and an abutting part (16a) that can abut the frame driving body (1) or the positioning pins (25, 26), and the engaging and disengaging with the positioning pins (25, 26). It is possible to connect the contact portion (16a) to the frame driving body (1) or the positioning pin when locked.
(25, 26) consisting of a clamp mechanism (21) which can be elastically held in a pressed state, and when clamped by the clamp mechanism (21), a pair of positioning pins (25, 26) and an engaging portion. An embroidery frame holding structure for an embroidery sewing machine, characterized in that the engagement with (20, 20) restricts lateral movement and longitudinal movement of the frame holding body (14) with respect to the frame driving body (1). . 2. A flange is provided on the positioning pin (25, 26).
The (31) is formed, and the lower surface thereof is a contact surface (31a) for restricting the upward movement of the frame holding body (14) by engaging with the engaging portions (20, 20). Embroidery frame holding structure for embroidery sewing machines. 3. The embroidery according to claim 2, wherein a receiving surface (28a) for supporting the engagement portion (20, 20) is formed below the flange (31) of the positioning pin (25, 26). Sewing machine embroidery frame holding structure. 4. The engagement portion (20, 20) is provided with the flange (3
4. A large-diameter circular hole (22) which allows the insertion of 1) and a small-diameter circular hole (23) which communicates with the large-diameter circular hole and can be fitted into the positioning pins (25, 26) in a substantially close fit. The embroidery frame holding structure of the embroidery sewing machine described. 5. The abutting portion (16a) is the frame holder (14).
5. The reinforcing member (16) is formed at the rear end of the reinforcing member (16).
An embroidery frame holding structure for an embroidery sewing machine according to any one of 1.