JP2764641B2 - Composite sewing machine capable of normal and embroidery stitching - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a storage device for an embroidery frame mounting portion in a composite sewing machine capable of normal sewing and embroidery sewing.

(Prior Art) A conventional sewing machine capable of embroidering (see FIG. 6) is provided in the sewing machine frame through an opening 51 formed toward the bed upper surface 3 at the base of the arm machine frame 1 rising from the bed machine frame 2. A carriage 52 driven and controlled by an embroidery frame drive mechanism (not shown) provided on the outside faces the outside. The carriage 54 is provided with a bracket 54 provided integrally with the outer frame of the embroidery frame 53. Is removably fixed by a tightening screw 55.

The embroidery frame 6 is driven XY within an allowable range (a range shown by a two-dot chain line in FIG. 6) by a driving mechanism. Hoop hoop drive range at least 80mm
When the carriage 52 is protruded from the base of the arm machine frame 1 in the X direction on the bed surface, the distance L of the width of the back to the arm machine frame jaw is significantly larger than the span distance of the normal sewing machine. Since the size of the embroidery frame increases, the arm frame must be repaired each time the drive range of the embroidery frame is changed, which places a heavy burden on the manufacturer.

(Problem to be Solved by the Invention) The present invention is a composite sewing machine capable of normal sewing and embroidery sewing, enabling normal sewing without changing the outer basic dimensions of an existing normal sewing machine, and also using conventional embroidery. The sewing machine can be sewn, for example, the embroidery frame
By driving about 100 mm to 100 mm, it is possible to sew a sufficiently large embroidery pattern.

(Means for Solving the Problems) The present invention is a composite sewing machine capable of normal sewing and embroidery stitching. The conventional basic sewing machine can be used to perform normal sewing, thereby reducing the basic outer dimensions of the normal sewing machine. By providing a carriage on the back side of the sewing machine frame that allows the embroidery frame to be mounted without changing it, the embroidery frame mounted on the mounting portion can be sufficiently large by using the mounting portion protruding when used. Can be driven within a range in which sewing is possible.

(Function) The present invention provides a needle bar support for swingably supporting a needle bar vertically moved by a drive shaft supported above the sewing machine frame, and a needle bar support below the sewing machine frame. A thread catching device for forming a seam in cooperation with the needle bar; and an embroidery X below the bed machine frame supporting the thread catching device.
In a sewing machine provided with an embroidery driving machine frame having a built-in -Y driving mechanism, a normal sewing using the needle bar support swingably and an embroidering sewing using the XY embroidery driving mechanism for driving are used. An operating unit for selecting any one of the following; a carriage for moving the embroidery XY drive mechanism to an initial position in the normal sewing state; and an embroidery frame mounting unit rear surface of the carriage moved to the initial position in the sewing machine. It is characterized by being toothed inward from the projection surface of the machine frame, so that the carriage does not protrude from the projection surface of the sewing machine frame during normal sewing, so it is compact and the sewing machine can be used when the sewing machine is not used. The cover is made aesthetic, and it is possible to avoid collision of other objects with the carriage during transportation or the like.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a sewing machine frame, which comprises an upper arm machine 2 and a lower bed machine frame 3, and the upper arm machine. A drive shaft 4 is rotatably supported by the frame 2, and an excavator wheel 5 exposed to the outside of the machine frame is attached to one end of the drive shaft, and a needle bar which is moved up and down via a balance crank 6 and the like at the other end. A presser bar 8 is mounted on the arm machine frame 2 with a cloth presser 8 'mounted at the lower end in parallel with the needle bar. The lower bed machine frame 3 has a corner portion 3 'formed at an appropriate position on the back side surface. The bed machine frame 3 has a yarn catching device 9 and a feed drive mechanism 11 for facing a feed dog 10 on the surface. An embroidery drive frame 12 is provided below the bed machine frame 3 at an interval allowing the cloth to pass therethrough, and the embroidery frame is driven planarly in the embroidery drive frame. X-Y drive mechanism 13 for the operation is provided.

The embroidery frame mounting portion of the embroidery frame carriage 15 of the XY drive mechanism 13 faces outward from a horizontally long opening 14 formed in the step side surface 12 ′ of the embroidery driving machine frame 12. . The mounting portion rear surface 15 'of the embroidery frame carriage has a position where the position of the carriage 15 at the time of normal sewing is any position in the projection plane of the sewing machine frame 1 as shown in FIG. Is located on the same plane as or inside the back side surface 12 "which is the outline of the vehicle, and does not protrude outward from the back side surface 12" which is the outline.

An operation panel 16 is provided on a front wall of the arm machine frame 2, and a normal sewing key 17, an embroidery key 18, a pattern character key 19, and the like are provided on the operation panel.

The needle bar 7 is swingably supported by a needle bar support 20, and the amplitude is controlled by the rotation of a control drive motor (not shown) via an amplitude rod 21 connected to the needle bar support. When the normal sewing key 17 is being operated for selection, the amplitude of the needle bar is controlled.

An embroidery frame 22 is detachably fixed to the embroidery frame carriage 15.

Hereinafter, the XY drive mechanism 13 will be described in detail (fifth embodiment).
See figure).

The embroidery drive frame 12 has an X-direction feed screw shaft 23 and
24 is rotatably supported, and the outer periphery of the feed screw shaft has screw-shaped grooves 25 and 26 having leadless portions 27 and 28 at the ends.
The pulleys 29 and 30 are fixed to one end, and a timing belt 31 is mounted between the pulleys. A carriage guide 32 is provided between both feed screw shafts 23 and 24.
The carriage guide is mounted on both ends of the feed screw shaft.
Carry guide pins 33 are provided for engaging the threaded grooves 25 and 26 of 23 and 24, and the hoop carriage
15 are provided.

The embroidery drive frame 12 supports a Y-direction drive shaft 34 parallel to the X-direction feed screw shaft 23, and pulleys 35 and 35 are fixed to both ends of the Y-direction drive shaft. Pulleys 36 and 36 are rotatably supported at the machine frame facing position, and timing belts 37 and 37 are mounted between the pulleys and the pulleys 35 and 35 of the Y-direction drive shaft 34, respectively. A Y guide plate 38 long in a direction orthogonal to the carriage guide 32 is provided between the belt presser 39 and
Secured by 39. A small gear 40 is fixed to the end of the Y-direction drive shaft 34, and is meshed with a gear 42 fixed to the drive shaft of the Y-direction control motor 41.

On the other hand, a bevel gear 43 is fixed to an end of the X-direction feed screw shaft 23, and the bevel gear is attached to a lower end of a drive shaft 44 of the control drive motor (not shown) for swinging the needle bar support 20. It is meshed with the fixed bevel gear 45.

The embodiment of the present invention is configured as described above, and the operation is as follows.

When the sewing machine embodying the present invention is connected to a power source and switched on, the normal sewing is automatically selected with priority. The embroidery frame carriage 15 is positioned at an initial position in the projection plane of the sewing machine frame 1 (the corner 3 ′ formed on the back side surface of the bed machine frame 3).
Position) automatically returned to.

Next, the embroidery key 18 is selected and the embroidery frame 22 is mounted on the carriage 15 and the cloth is stretched on the frame. After selecting a desired figure, the sewing machine is operated.
The embroidery frame 22 is automatically driven based on the control data.

The rotation of the embroidery frame is performed by controlling and driving the X direction movement with the X direction feed screw shafts 23 and 23 and the Y direction movement with the Y direction drive shaft 34.

The driving range of the hoop is linked to the movement of the carriage 15 within the range shown by the two-dot chain line in FIG. If the switch is turned off or the connection to the power supply is cut off while embroidery is selected, the embroidery carriage remains stopped at a position other than the initial position, and is then returned to the initial position upon connection to the power supply. Until that state continues.

Next, when the embroidery frame 22 is removed from the carriage 15 and the normal sewing key 17 is selected and operated, the embroidery frame carriage 15 is automatically returned to the initial position in the projection plane of the sewing machine frame 1.

In FIG. 5, the initial position of the XY drive mechanism 13 is such that the carriage 15 is moved to one side in the X direction by rotation of the feed screw shafts 23, 24 in the X direction, and the carriage guide pins 33, 33 lead. The carriage 15 was moved to one side in the Y-direction by the rotation of the Y-direction drive shaft 34 and was moved to the corner 3 ′ formed on the back surface of the bed frame 3. State.

If various patterns are selected in this state, pattern sewing is performed by normal sewing.

(Effects) Since the embodiment of the present invention has the above-described structure and operation, the embroidery frame carriage 15 is returned to the initial position after the end of the embroidery sewing as well as at the end of the normal sewing. Is returned to the corner 3 ′ formed on the back side surface of the bed machine frame 3 provided in the projection plane of, so that the carriage mounting portion back surface 15 ′ coincides with the back side surface 12 ′ of the embroidery drive machine frame 12. The sewing machine is more compact because it is located on the inner side, and the cover that covers the sewing machine can be gracefully designed.In addition, there are no protruding parts in the horizontal direction, so there are also problems such as bumping into other objects during transportation. This can be avoided and has a great effect on design and practical use.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is an external perspective view of a sewing machine embodying the present invention, FIG. 2 is an external perspective view of a partial cross section of the sewing machine of the present invention, and FIG. FIG. 4 is a perspective view showing a state in which the hoop of the present invention is removed, FIG. 4 is an external perspective view showing the back of the sewing machine of the present invention, FIG. 5 is a perspective view of a main part showing a driving mechanism of the present invention, and FIG. 3 is a bed frame, 3 'is a corner, 4 is a drive shaft, 9 is a thread catcher, 12 is an embroidery drive frame, 15 is a carriage, 17 is a normal sewing key, and FIG. Reference numeral 18 denotes an embroidery key, and reference numeral 20 denotes a needle bar support.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) D05B 1/00-83/00

Claims (1)

(57) [Claims] 1. A drive shaft rotatably supported in an arm machine frame of a sewing machine, and a needle bar supported and pivotably supported by a needle bar which is vertically moved in conjunction with rotation of the drive shaft. A sewing machine comprising a rod support, a thread wheel catching device supported in a bed machine frame of the sewing machine, and an embroidery drive machine frame having a built-in embroidery XY drive mechanism and provided below the bed machine frame; An operating section for selecting one of a normal sewing used by swinging the needle bar support and an embroidery used by driving the embroidery XY drive mechanism; and A carriage which is moved to an initial position of the embroidery XY drive mechanism, and which is moved from the initial position to an embroidery position by selecting an embroidery, and a carriage on the back side surface of the bed machine frame. Match the initial position A corner for accommodating the carriage to be accommodated is provided, and the back of the mounting portion of the embroidery frame of the carriage that is moved to and stored in the corner for the selection of the normal sewing is disposed inside the embroidery drive frame or the back side of the bed frame. A composite sewing machine capable of normal sewing and embroidery sewing, wherein