JPH0612496U - Embroidery frame fixing device for embroidery machines - Google Patents

Abstract

(57) [Summary] (Modified) "Purpose" The present invention has a structure that allows easy and quick attachment of the hoop to the carriage of the hoop driving mechanism built into the hoop sewing machine. To do. [Structure] Positioning holes and grooved mounting holes are provided in the fixing plate of the carriage of the hoop driving mechanism, a cam surface is formed around the mounting hole on the back surface of the fixing plate, and mounting arms are attached to the outer frame of the hoop. A mounting plate having a guide pin and a fixing shaft portion is mounted on the mounting arm, an operating portion is provided above the fixing shaft portion, and a pin shaft is provided below, and the bottom surface of the hole portion of the operating portion and the mounting portion are provided. Attach a spring to the top of your body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an embroidery frame fixing device for an embroidery sewing machine.

[0002]

[Prior art]

 As shown in FIG. 4, FIG. 5 and FIG. 6, the conventional hoop fixing device for an hoop sewing machine is a part of the carriage 2 of the hoop driving mechanism equipped with the XY bidirectional driving components built in the sewing machine 1. If the hoop 4 is attached to the flat mounting portion 3 provided on the above with the tightening screw 5, the hoop driving mechanism is automatically driven by computer control so that the hoop movement is automatically performed. The tightening screw 5 is tightly tightened if a fingertip or a screwdriver is used, but there is a troublesome odor that a screwdriver must be used one by one. Therefore, it is easy to pinch the screw with a fingertip and tighten it. However, if the strength of the fingertip is weak, the embroidery frame is not firmly fixed to the carriage, so that the embroidery frame is easy to move and the embroidery pattern is disturbed, resulting in poor embroidery performance.

[0003]

[Problems to be solved by the device]

 The present invention provides an embroidery frame fixing device having a structure in which an embroidery frame can be easily and reliably fixed to a mounting portion provided at one end of a carriage of an embroidery frame driving mechanism provided in a sewing machine. The purpose is.

[0004]

[Means for Solving the Problems]

 The present invention has a mounting hole provided with a cam portion on the back surface in the mounting portion provided at one end of the carriage of the hoop driving mechanism provided in the sewing machine, and the operating arm is provided at one end in the mounting arm on the embroidery frame side and is orthogonal. The embroidery frame can be securely fixed to the attachment part at one end of the carriage by a simple operation of the operation part by providing the pin shaft and the shaft part that can be slid and rotated by receiving the spring bias in the axial direction. It was done like this.

[0005]

[Action]

 The present invention has a grooved mounting hole in the mounting part provided at one end of the carriage of the hoop driving mechanism provided in the sewing machine and a cam part on the back surface thereof, and an operating part in which the lever is projected to the mounting frame on the embroidery frame side. And a shaft portion that can be inserted into the fixing hole of the mounting portion. The shaft portion is provided with a pin shaft projecting at a right angle and a spring for urging the shaft portion in the axial direction is wound. Then, the shaft portion inserted into the fixing hole is rotated by the operation of the operation portion, and is slid against the spring pressure to press the pin shaft orthogonal to the shaft portion to the cam portion on the rear surface of the mounting portion, It is characterized in that it is positioned so that it can be securely fixed with a simple operation.

[0006]

【Example】

 Referring to the drawings, the structure of the embodiment of the present invention will be described. The carriage 12 of the hoop driving mechanism provided on the back side of the bed machine frame 11 (FIG. 1) of the sewing machine and having the driving components in the two directions of XY. A fixing plate 13 having a mounting surface having a flat upper surface is provided in a part thereof and having a suitable plate thickness, and a keyhole-shaped mounting hole 14 for forming a groove extending in the lateral direction is provided at a substantially central portion of the fixing plate. Two positioning holes 15 are provided on both sides of the mounting hole, and a cam surface 16 having the lowest groove side is provided in the vicinity of the mounting hole 14 on the back surface of the fixing plate 13 in a range of about 90 ° centering on the mounting hole 14. A semicircular positioning groove 17 is provided at a position 90 ° from the groove portion (FIG. 3).

The embroidery frame 4 is composed of an outer frame 18 and an inner frame 19. The outer frame 18 is cut at appropriate positions, and an adjusting portion 20 capable of enlarging or reducing the size of the frame is provided between both ends of the cutting portion. It has been done. The outer frame 18 is further provided with a mounting arm 21 extending further, and the mounting arm is provided with a long hole 22 parallel to the X movement direction of the embroidery frame driving mechanism built in the machine frame. There is.

The mounting arm 21 is provided with a mounting plate 24 provided with two guide pins 23, 23 slidingly contacting the upper surface of the mounting arm and projecting downwardly so as to be slidable in the elongated hole 22. Has been.

Each of the guide pins 23, 23 has a retaining ring 25 fitted in a portion projecting downward from the mounting arm 21 to prevent the guide pin 23, 23 from being detached from the elongated hole 22.

A shaft mounting hole 26 is formed at a substantially intermediate position between the two guide pins 23, 23 of the mounting plate 24, and the mounting hole allows axial sliding and rotational rotation. A possible fixing shaft portion 27 is fitted and an operating portion 28 having a lever is fixed to the upper end of the shaft portion.

A retaining ring 29 is fitted in a position of the shaft portion 27 that protrudes from below the mounting arm 21 to allow appropriate sliding of the shaft portion 27 in the axial direction. A pin shaft 30 projecting in a direction perpendicular to the axial direction is provided at a further lower position.

When the hoop 4 is mounted on the carriage 12, the pin shaft is slidably brought into contact with the cam surface 16 of the fixing plate 13 of the carriage by inserting the shaft portion 27 into the mounting hole 14 and rotating.

A compression coil spring 31 is disposed on the shaft portion 27 mounted on the mounting plate 24 of the hoop 4 between the upper surface of the mounting plate 24 and the bottom surface of the hole provided on the lower surface of the operating portion 28. ing.

A cutout portion 32 is formed on the lower end surface of the operation portion 28 over a range of approximately 90 °, and the cutout portion is provided on a small pin-shaped stopper 33 projecting at an appropriate position on the mounting plate 24. The side surfaces of the grip portion 32 are brought into contact with each other to limit the rotation of the operation portion 28.

Since the present invention has the above-described structure, in order to attach the hoop 4 to the fixing plate 13 which is a part of the carriage 12 extended by the hoop driving mechanism, two positioning holes of the fixing plate are provided. The guide pins 23, 23 are inserted into the respective 15, 15 to determine the position of the embroidery frame, and the protruding pin shaft 30 is attached to the shaft portion 27 fixing the operation portion 28. The shaft portion 27 is inserted into the mounting hole 14 according to the direction of the groove formed in FIG. 3, and the height relationship of the pin shaft 30 with respect to the cam surface 16 in this state is as shown in A of FIG.

Next, when a finger is put on the lever and the operating portion 28 is rotated in the direction of the arrow R, the pin shaft 30 projecting at a right angle from the shaft portion 27 in the fixed plate 13 is formed on the back surface of the fixed plate 13 on the cam surface 16 Since the shaft portion 27 is slidably contacted with the shaft portion 27, the shaft portion 27 is rotated while being pulled downward against the spring pressure, and finally the pin shaft 30 is housed in the cylindrical positioning groove 17 located at about 90 ° from the groove portion. The rotation of the part 27 can be stopped. (The positions of the cam surface 16 and the pin shaft 30 shown in FIG. 3B. Therefore, the pin shaft slides by C and the spring pressure increases.)

Further rotation of the operating portion 28 and the shaft portion 27 is prevented by the side wall of the cut-out portion of the operating portion 28 contacting the stopper 33 protruding on the mounting plate 24.

To remove the hoop, the pin shaft 30 of the shaft portion 27 is disengaged from the groove 17 and follows the cam surface 16 when the lever of the operating portion 28 is turned in the opposite direction of the arrow R, so that the spring acting on the shaft portion 27 is removed. The force of 31 gradually weakens, and in a state where the axial direction of the pin shaft 30 and the direction of the groove formed in the mounting hole 14 coincide with each other, the retaining ring 29 fitted on the shaft portion 27 abuts the back surface of the mounting arm 21. Thus, the action of the spring 31 is blocked.

[0019]

【effect】

 Since the present invention has the structure and operation as described above, the hoop can be attached and detached very easily and quickly and securely without any wobbling. The effect is great.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention, FIGS. 4 to 6 show conventional examples, FIG. 1 is an exploded perspective view of the present invention, and FIG.
Is a cross-sectional view of the main part of the present invention, FIG. 3 is a cross-sectional view showing the relationship between the pin shaft and the cam surface of the present invention, FIG. 4 is an external view showing the embroidery frame mounting state of a conventional sewing machine, and FIG. 5 is a conventional example. 6 is an exploded perspective view of the hoop of FIG. 6, and FIG. 6 is a partial cross-sectional view of a conventional example. 4 ... Embroidery frame 12 ... Carriage 13 ... Fixing plate 14 ... Mounting hole 15 ... Positioning hole 16 ... Cam surface 24 ... Mounting plate 27 ... Fixing shaft 28 ... Operation part 30 ... Pin shaft 31 ... Spring

Claims (1)

[Scope of utility model registration request] An embroidery sewing machine having an embroidery frame driving mechanism built-in and having an embroidery frame detachably attached to a part of a carriage extending from the embroidery frame driving mechanism. Attached hole 14
A cam surface 16 is formed around the mounting hole 14 on the back surface of the fixed plate 13, and the embroidery frame 4 is attached to the outer frame 18
And an inner frame 19, the outer frame 18 is provided with a mounting arm 21, and the mounting arm has a guide pin 23 and a fixing shaft portion 27.
The mounting plate 24 provided with is attached to the fixing shaft portion 27, the lever-equipped operation portion is fixed to the upper end of the fixing shaft portion 27, and the pin shaft 30 is provided at the lower end of the fixing shaft portion 27. An embroidery frame fixing device for an embroidery sewing machine, characterized in that a spring 31 is attached to the upper surface of the sewing machine.