JPH0532060Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is capable of sewing both zigzag stitches by lockstitching using the feed dog of a sewing machine and stitching by using a stitching hoop without using the feed dog of the sewing machine. This invention relates to a sewing machine that can be used for both stitching and sewing.

(Problems to be solved by conventional technology and inventions) The diversification of sewing in ordinary households has led to the need for household sewing machines to combine lockstitching and overlocking functions in one machine, and for example to add embroidery functions. This necessitated the generalization of specialized functions that were traditionally reserved for professional and industrial use.

Focusing on the embroidery function, in order for a embroidery machine to function as a general household user, it should also have a cloth feeding device using a feed dog, which is the function of conventional sewing machines, and many proposals have been made regarding this matter. ing. However, both proposals are based on ideas centered on the embroidery machine, and although the sewing work surface for normal sewing must be a smooth flat surface for handling the cloth, the embroidery frame drive function is not included. The sewing work surface is provided with a mechanism for obtaining the movement and grooves and holes for obtaining the movement locus.
There was a problem that the sewing work surface was not a smooth flat surface.

(Means for solving the problems and effects of the invention) In the present invention, the embroidery frame drive device is housed in the vertical body of the sewing machine when normal stitching is selected, and the embroidery frame drive device is housed in the vertical body of the sewing machine when the embroidery sewing mode is selected. is pushed out from the vertical body of the sewing machine in a cantilevered manner, and part of its weight is supported by rollers moving on the sewing work surface to obtain a motion trajectory in the X direction. Since there are no mechanisms or grooves or holes for obtaining the movement trajectory, and the sewing work surface is a smooth plane, it is possible to perform good embroidery using the embroidery frame, and also to perform normal embroidery using a sewing machine. During zigzag sewing, the workpiece moves smoothly on the sewing work surface, resulting in good sewing performance.

(Example) The present invention will be explained below with reference to an example. When selecting normal stitching by the sewing machine, the stitching frame drive device 2
is stored in the vertical body part 1a of the sewing machine 1, as shown in FIG. It protrudes from the center according to the controlled amount in the X direction.

A stitching frame 3 is detachably attached to the stitching frame drive device 2, and can be used in the normal sewing mode and the second stitching mode shown in FIG.
Selection of the embroidery sewing mode shown in the figure is performed by operating the selection dial 4. That is, the selection dial 4 has a display for the embroidery sewing mode (EMB.) as an extension of the pattern display for the normal sewing mode, and when the embroidery sewing mode is selected by the selection dial 4, the feed dog (not shown) is displayed. is lowered from the throat plate surface 1c, and the stitching frame drive device 2 is housed in the vertical body portion 1a of the sewing machine 1 when various normal stitches are selected.

Although not shown here, it is also possible to cover the entrance of the embroidery frame drive device 2 when it is stored in the vertical body section 1a of the sewing machine 1 in order to prevent the fabric from getting caught during fabric handling during normal sewing. It is effective for

Details of the embroidery frame drive device will be explained with reference to FIG. 5.

Main frame In front of the intermediate frame 10, there is a front frame 11.
is fixed with screws 12, and a rear frame 13 is fixed with screws 14 to the rear of the intermediate frame 10, and these constitute a main frame.

Main frame guide The front frame 11 has two pairs of upper and lower roller members 1.
5 and 16 are attached with stepped screws 17, and these roller members 15 and 16 sandwich a rail portion 19a of a guide rail 19 fixed to the sewing machine frame with screws 18 from above and below, and the front frame 11 is rotated in the X direction. being guided.

A gear receiver 20 is attached to a screw 21 on the rear frame 13.
The hole portion 20a is guided to the square shaft 23 via the bearing portion 22a of the square shaft gear 22 so as to be movable in the X direction. The square shaft 23 is a support member 2 fixed to the sewing machine frame with screws 25 via a pair of bearings 24.
6 is rotatably supported.

Therefore, even if the corner shaft 23 is rotated, the rear frame 13 is guided so as to be movable only in the X direction along the corner shaft 23 without transmitting the rotation.

A roller 28 is connected to the intermediate frame 10 via a shaft 27.
is attached so that the rollers 28 can roll on the sewing work surface 1b of the sewing machine 1.

Control in the X direction A wire 30 is fixed to the front frame 11 and the rear frame 13 by wire pressers 31 and 32, and the wire 30 has a loop shape, and as shown in FIG. idlers 34, 35, 36, 37,
It is connected to the other end of the wire wound around the drive pulley 33 via 38 and 39. For example, when the drive pulley 33 rotates clockwise in the figure, the wire pressers 31 and 32 move in the direction of the arrow in the figure, respectively. It is designed so that it can be moved by an equal amount in any direction.

Control in the Y direction The movement of the stabbing frame 3 in the Y direction is taken from a square shaft 23 which is rotated by a Y drive motor (not shown). That is, the gear 4 is driven by the Y drive motor.
When the square shaft gear 23 is rotated through a gear train including 0, the square shaft gear 22 rotates through a Y drive gear 42 and an intermediate gear 41 pivotally supported on the intermediate frame 10.
The drive shaft 43 is rotated. The Y drive shaft 43 is rotatably supported by the intermediate frame 10 via a pair of bearings 44, and has a Y drive pulley 45 fixed to one end.

The Y drive pulley 45 transmits its rotational motion to a drive belt 47 stretched between it and the pulley 46.

The pulley 46 is rotatably supported by a shaft 49 fixed to the intermediate frame 10 with a screw 48 via a spacer 50 .

The carriage 51 connects the drive belt 47 with a screw 52.
A clamping pressure is applied together with a clamping plate 53 attached to the clamping plate 53.

A carriage support shaft 54 supported by the front frame 11 and the rear frame 13 is inserted into the carriage 51, and a roller 55, which is inserted into the groove 10a of the intermediate frame 10, is attached via a stepped screw 56. Rotation about the carriage support shaft 54 is stopped.

The carriage 51 has a stabilizing frame holding member 5.
7 and 58 are fixed with screws 60, and the stabbing frame 3 can be attached to these parts.

The carriage 51 is configured to be moved in the Y direction along a carriage support shaft 54 by rotation of the Y drive pulley 45.

Here, since the square shaft gear 22 is slidable in the X direction with respect to the square shaft 23, even if the stabbing frame drive device 2 moves in the X direction, the movement in the Y direction is reliably transmitted to the carriage 51. , Stitching frame holding member 5
The stitching frame 3 is moved in the Y direction via the needles 7 and 58.

The stabbing frame drive device 2 uses an X-axis drive motor to move the
It receives directional power and moves in the needle drop direction, which is the X direction, as if protruding outwardly from the vertical body part 1a of the sewing machine 1 with a cantilever, and part of its weight is removed by the roller 28 rolling on the sewing work surface 1b The department is supported.
With this configuration, the sewing work surface 1b
The mechanism and operation of the embroidery frame drive device 2 are shown on the top.
There are no grooves, holes, etc. for obtaining a trajectory, and the sewing work surface 1
b The top is a smooth plane.

In FIG. 5, reference numeral 61 indicates a position sensor 62 in the X direction, which is a shielding plate.

When normal stitching is selected by operating the selection dial 4, the embroidery frame drive device 2 has a shielding plate 62 that enters the groove of the position sensor 61 to block light passing through the upper and lower sides, and this position is when the embroidery frame is selected. This is the storage position of the sewing machine vertical body section 1a of the drive device 2.

The stitching frame drive device 2 is also equipped with a Y-direction position sensor (not shown), and this sensor moves and positions the carriage 51 to the center of the Y-direction control range when it is housed in the sewing machine vertical body 1a. It's becoming like that. In this case, it is effective to feed the cloth using a feed dog (not shown) of the sewing machine.

When the stitching mode display (EMB.) is aligned with the indicator by operating the selection dial 4, the feed dog sinks from the throat plate surface of the sewing machine, and the stitching frame drive device 2 moves from the vertical body section 1a of the sewing machine. Sewing work surface 1b
A part of the weight is supported by the rollers 28 rolling on the upper part, and the needle drop is initially set so as to protrude in the X direction, and the needle drop faces the center of the stabilizing frame 3 in the X and Y directions.

(Effects) As described above, according to the present invention, the embroidery frame drive device is housed in the vertical body of the sewing machine when normal sewing is selected, and the embroidery frame drive device is stored in the vertical body of the sewing machine when the embroidery sewing mode is selected. It is pushed out from the torso in a cantilevered manner, and part of its weight is supported by rollers rolling on the sewing work surface to obtain a motion trajectory in the X direction. Since there are no grooves, holes, etc. for obtaining the movement trajectory, and the sewing work surface is a smooth plane, it is possible to perform good stitching using the stitching frame, and it is also easy to use when sewing regular zigzag stitches with a sewing machine. The object to be sewn moves smoothly on the sewing work surface, resulting in the effect that good sewing can be performed.

[Brief explanation of the drawing]

The drawings relate to an embodiment of the present invention; Fig. 1 is an external view of the sewing machine when normal stitching is selected, Fig. 2 is an external view of the sewing machine when embroidery mode is selected, and Fig. 3 is an external view of the sewing machine when stitching is selected as seen from the front. A diagram showing the main parts of the Yu-frame drive device,
Fig. 4 is a diagram showing the main parts of the embroidery frame drive device when viewed from the rear, Fig. 5 is an exploded perspective view of the embroidery frame drive unit, and Fig. 6 is a schematic diagram of the X-axis drive mechanism. . 1 is a sewing machine, 1a is a vertical body part, 1b is a sewing work surface, 1c is a throat plate surface, 2 is a stitching frame drive device, 2
8 is a roller, 51 is a carriage, and 54 is a carriage support shaft.

Claims (1)

[Scope of claims for utility model registration] (1) A stitch forming mechanism consisting of a needle bar, a thread take-up, a hook, etc.
It has a fabric feed drive mechanism that feeds the fabric using a feed dog in synchronization with the needle bar movement, and a stitching frame drive mechanism that drives and controls the stitching frame in the XY directions in synchronization with the needle bar movement. In a sewing machine in which the driving mechanism can be selectively selected by switching the sewing mode of the sewing machine, when the normal sewing mode is selected, cloth feeding is enabled by the feed dog, and the embroidery frame driving mechanism is housed in the vertical body of the sewing machine. When the stitching mode is selected, the feed dog sinks from the throat plate surface, and the stitching drive mechanism moves the stitching frame along the carriage support shaft fixed to the main frame in the Y direction. The main frame is moved along with the main frame by the X motor in the X direction connecting the vertical body of the sewing machine and the needle drop, and a part of the stitching frame drive mechanism is cantilevered from the vertical body of the sewing machine. A sewing machine that can be used for both sewing and stitching. (2) When the stitching frame drive device is controlled to move in the X direction and cantileverly protrudes from the vertical body of the sewing machine, it rolls on the sewing work surface and some of the weight of the stitching frame drive device is lost. The sewing machine for both stitching and stitching as claimed in claim 1 of the utility model registration claim, characterized in that the sewing machine is equipped with a roller that supports the sewing machine.