JP2571184Y2 - Embroidery frame fixing device for embroidery sewing machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embroidery frame fixing device for an embroidery sewing machine.

[0002]

2. Description of the Related Art As shown in FIGS. 4, 5 and 6, a conventional embroidery frame fixing device for an embroidery sewing machine has a carriage of an embroidery frame drive mechanism provided with two XY drive components built in a sewing machine 1. FIG. When the embroidery frame 4 is mounted on the flat mounting portion 3 provided on a part of the embroidery frame 2 with the tightening screw 5, the embroidery frame drive mechanism is driven by computer control so that the embroidery movement is automatically performed. However, the tightening screw 5 can be firmly tightened by using a fingertip or a screwdriver, but has a troublesome odor that requires the use of a screwdriver each time. However, when the force of the fingertip is weak, the embroidery frame is not sufficiently fixed to the carriage, so that the embroidery frame is easily moved, so that the embroidery pattern is disturbed and the embroidery performance is poor.

[0003]

SUMMARY OF THE INVENTION The present invention relates to an embroidery having a structure in which an embroidery frame can be securely fixed to an attachment portion provided at one end of a carriage of an embroidery frame driving mechanism provided in a sewing machine by a simple operation. It is an object to provide a frame fixing device.

[0004]

According to the present invention, a mounting portion provided at one end of a carriage of an embroidery frame driving mechanism provided on a sewing machine is provided with a mounting hole having a cam portion formed on a back surface, and the mounting arm on the embroidery frame side is provided. An embroidery frame is provided at one end of the carriage by a simple operation of the operating unit by providing an operating unit at one end and an orthogonal pin shaft and a shaft unit that is slidable and rotatable under the bias of an axial spring. This can be securely fixed to the mounting portion.

[0005]

According to the present invention, the mounting portion provided at one end of the carriage of the embroidery frame drive mechanism provided on the sewing machine is provided with a grooved mounting hole and a cam portion on the back surface thereof, and the lever is protruded from the mounting frame on the embroidery frame side. A spring, which is provided integrally with the operating portion and which can be inserted into the fixing hole of the mounting portion, has a pin shaft projecting at right angles to the shaft portion, and biases the shaft portion in the axial direction. The shaft portion inserted into the fixing hole is rotated by operating the operation portion, and is slid against the spring pressure to press the pin shaft orthogonal to the shaft portion against the cam portion on the back surface of the mounting portion. In this case, the positioning is performed, and it is possible to securely fix by a simple operation.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of an embodiment of the present invention will be described with reference to the drawings. An embroidery frame drive mechanism provided on the back side of a bed frame 11 (FIG. 1) of a sewing machine and provided with drive components in two directions X and Y. A fixing plate 13 having a mounting surface with a flat upper surface and an appropriate thickness is provided in a part of the carriage 12 and a keyhole-shaped mounting hole 14 having a laterally extending groove formed substantially in the center of the fixing plate. And two positioning holes 1 on both sides of the mounting hole.
5, a cam surface 16 having the lowest groove portion is provided in the vicinity of the mounting hole 14 on the back surface of the fixing plate 13 in a range of approximately 90 ° with the mounting hole 14 as a center.
A semicircular positioning groove 17 is provided at a position of 0 °
(FIG. 3).

The embroidery frame 4 comprises an outer frame 18 and an inner frame 19, and the outer frame 18 is cut at an appropriate position, and an adjusting portion 20 is provided between both ends of the cut portion so as to enlarge or reduce the size of the frame. ing. The outer frame 18 is further provided with an extending mounting arm 21, and the mounting arm is provided with a slot 22 parallel to the X movement direction of the embroidery frame drive mechanism built in the sewing machine frame. .

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

Each of the guide pins 23 is fitted with a retaining ring 25 at a portion projecting downward from the mounting arm 21 to prevent the guide pin 23 from coming off from the elongated hole 22.

The two guide pins 23, 2 of the mounting plate 24
3, a shaft mounting hole 26 is formed, and a fixing shaft 27 capable of sliding in the axial direction and rotating in the rotational direction is fitted in the mounting hole. An operation portion 28 having a lever is fixed to the upper end of the portion.

A retaining ring 29 is fitted at a portion of the shaft portion 27 protruding from below the mounting arm 21 so as to allow the shaft portion 27 to slide appropriately in the axial direction.
Further, a pin shaft 30 projecting in a direction perpendicular to the axial direction is provided at a position further below.

The pin shaft connects the embroidery frame 4 to the carriage 1.
At the time of mounting on the carriage 2, the shaft 27 is inserted into the mounting hole 14 and rotated to be brought into sliding contact with the cam surface 16 of the fixing plate 13 of the carriage.

A compression coil spring 31 is disposed on a shaft 27 mounted on the mounting plate 24 of the embroidery frame 4 between an upper surface of the mounting plate 24 and a bottom surface of a hole provided on a lower surface of the operation unit 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 a small pin-shaped stopper 33 protruding from an appropriate position on the mounting plate 24 is provided with the cutout portion. The rotation of the operation unit 28 is restricted by abutting the side surfaces of the unit 32.

Since the present invention has the above structure, the hoop 4 can be attached to the fixing plate 13 which is a part of the carriage 12 extending from the hoop driving mechanism by using two positioning holes 15 of the fixing plate. Guide pins 23, 2
3 is inserted, the position of the embroidery frame is determined, and the pin shaft 30 protruding from the shaft portion 27 fixing the operation portion 28 is aligned with the direction of the groove formed in the mounting hole 14 of the fixing plate 13. Part 27
Is inserted into the mounting hole 14, and the cam surface 1 in this state is
The relationship between the height of the pin shaft 30 and the height of the pin 6 is shown in FIG.

Next, a finger is put on the lever, and the operation unit 28 is moved with an arrow R
When it is turned in the direction, the pin shaft 30 projecting perpendicularly from the shaft portion 27 in the fixed plate 13 comes into sliding contact with the cam surface 16 formed on the back surface of the fixed plate 13, so that the shaft portion 27 is pulled downward against the spring pressure. Finally, the pin shaft 30 is housed in the cylindrical positioning groove 17 located at about 90 ° from the groove, and the rotation of the shaft 27 can be stopped. (The position 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 hollow portion of the operating portion 28 abutting against the stopper 33 projecting above the mounting plate 24.

The embroidery frame can be removed from the operation unit 28.
When the lever is turned in the opposite direction of the arrow R, the pin shaft 30 of the shaft 27 is disengaged from the groove 17 and follows the cam surface 16, so that the shaft 27
The force of the spring 31 acting gradually decreases, and when 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 is attached to the back surface of the mounting arm 21. To prevent the action of the spring 31.

[0019]

[Effect] The present invention has the above-mentioned structure and operation, so that the mounting and dismounting of the embroidery frame can be performed very easily and quickly, and can be securely fixed without any wobble. There is a great practical effect.

[Brief description of the 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.
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 a state in which the embroidery frame of the conventional sewing machine is attached, and FIG. 5 is a conventional example. 6 is a partial cross-sectional view of the conventional embroidery frame, and FIG. 6 is a partial sectional view of the conventional embroidery frame. 4 embroidery frame 12 carriage 13 fixing plate 14 mounting hole 15 positioning hole 16 cam surface 24 mounting plate 27 Fixing shaft part 28 ... Operation part 30 ... Pin shaft 31 ... Spring

Claims (1)

(57) [Scope of request for utility model registration] A carriage connected to an embroidery frame drive mechanism.
The embroidery frame can be detached and attached to the embroidery frame.
For embroidery sewing machines to form embroidery patterns on woven fabric
A frame fixing device, comprising: a fixing device provided on the carriage.
The plate is provided with grooved mounting holes along with positioning holes.
The embroidery frame is composed of an outer frame and an inner frame.
A mounting arm is provided, and the mounting arm has the positioning hole.
And a slot corresponding to the mounting hole is provided.
Fits into the long hole and the positioning hole of the fixing plate from above the clasp
Guide pin that fits and fixing shaft that fits into the mounting hole
The mounting shaft provided with
An operation unit with a lever is fixed to the upper end of the mounting plate.
A spring is fitted to the shaft between the
The lower end has a pin that can pass through the groove of the mounting hole.
A shaft is provided below the mounting hole of the fixing plate.
Is the thickness from the groove position in the direction of rotation about the hole
The cam surface and the rotation position are tilted so that
Stab characterized by forming a positioning groove to be formed
Embroidery frame fixing device for sewing machines.