JPS6238619Y2 - - Google Patents

Description

[Detailed description of the invention] Technical field This invention relates to a foldable sewing machine.

Purpose The purpose of this invention is to provide a foldable sewing machine that can reduce the overall volume of the sewing machine and facilitate transportation and storage.

First Example Hereinafter, the first example that embodies this idea will be described as the first example.
6 to 6 will be explained.

The frame body 1 of the sewing machine includes an upper arm 2, a lower arm 3, and a pillar 4 that connects both arms 2 and 3.
In this embodiment, the upper arm 2
and the pedestal 4 are integrally formed, the lower arm 3 is rotatably connected to the pedestal 4, and the lower arm 3 is fixed on the base 5. A handle 6 is attached to the top of the upper arm 2, and a head 8 is formed at the end thereof.
A needle bar 27 is supported on the head 8, and the needle 7 is attached to the lower end of the needle bar 27. Said lower arm 3 forms a cylindrical bed 9 on the free arm, in which bed 9 a needle plate 10 is fitted in a position below said needle 7.
is provided. In addition, in FIG. 1, 11 is a feed dog.

As shown in FIGS. 1 and 4, the base 5
A front plate 13 is rotatably connected to the front end by a connecting part 12, and a connecting tool 14 is attached to the tip of the front plate 13.
A first working plate 15 is rotatably connected to the first working plate 15 via a screw (shown in FIG. 3). As shown in Figure 3,
A pin 16 is provided on the lower surface of the rear end of the first work plate 15.
The pin 16 is provided in a recess 17a of the stopper 17, which is formed in a protruding manner on the front surface of the lower arm 3.
is removably fitted to the A second work plate 18 is rotatably connected to the left end of the first work plate 15 via a connector 19, and as shown in FIG. 4, a pin 28 protrudes from the rear end. lower arm 3
It is locked in a recess 20a provided in a stopper 20. Then, each pin 16, 28 has a recess 17a, 2
0a, the first and second
The upper surfaces of the working plates 15, 18 and the upper surface of the lower arm 3 form the same plane, thereby forming a working surface 21 during sewing work.

Next, the connection structure between the lower arm 3 and the pillar 4 will be described in detail.

As shown in FIGS. 3 and 4, a first bearing portion 22 is formed at the lower left end of the pillar 4, and a second bearing portion 23 is formed at the right end of the lower arm 3. . A hollow shaft 24 is rotatably inserted into the first and second bearing parts 22 and 23, and a first
A flange portion 25 that engages with the end surface of the second bearing portion 22 is integrally formed, and a retaining ring 26 that engages with the left end surface of the second bearing portion 23 is provided at the left end of the flange portion 25 .
is fitted and fixed. And this hollow shaft 24
The lower arm 3 and the pedestal 4 are rotatably connected, and the upper arm 2 and the pedestal 4, which are integrated with each other, are erected on the base 5 when the sewing machine is in use, and when the sewing machine is not in use. It is designed to lie down on the base 5.

As shown in FIGS. 3 and 5, a lever 30 as a manual operating body is rotatably supported by a support pin 29 provided at the lower end of one side of the pillar 4, and a finger rest 31 at the tip thereof is rotatably supported by a support pin 29 provided at the lower end of one side of the pillar 4. Recess 33 formed in cover 32
It is exposed to the outside of the pillar 4 while being housed inside. At the lower end of this lever 30, a side-shaped rectangular insertion hole 34 is provided so as to extend vertically in FIGS. 3 and 5. Furthermore, a pair of elongated holes 35 extending in the vertical direction are formed.

On the other hand, a sleeve 37 is formed on the pillar 4 at a position adjacent to the first bearing portion 22, and a sleeve 37 is formed on the right end surface of the lower arm 3 so as to face the sleeve 37, as shown in FIG. First and second positioning holes 38 are provided forward and downward on the same circumference centered on the axis of the hollow shaft 24,
39 are formed respectively. When the upper arm 2 and the pillar 4 are erected on the base 5, the sleeve 37 is inserted into the first positioning hole 38.
The sleeve 37 communicates with the second positioning hole 39 when the upper arm 2 and the pillar 4 are lying on the base 5.

As shown in FIG. 5, a connecting pin 40 is inserted into the insertion hole 34 of the lever 30, and a connecting pin 40 is inserted into the flat part 40 at the base end thereof.
a, is rotatably supported by a mounting shaft 41 inserted through the elongated hole 35, and
The distal end side of the connecting pin 40 is inserted into the sleeve 37. Therefore, when the lever 30 is accommodated in the recess 33 of the pillar section, the connecting pin 40 is fitted into the first or second positioning hole 38, 39 from the sleeve 37, and the lever 30 is inserted into the recess 33.
3, the connecting pin 40 is pulled out from the first or second positioning hole 38, 39 and retracted into the sleeve 37. Thus, the sleeve 37, the first and second positioning holes 38, 39, and the connecting pin 40 are used to selectively hold the integrated upper arm 2 and pedestal 4 in the upright position or the recumbent position. The position holding means 42 in the embodiment is configured.

In the sewing machine of this embodiment, a lower shaft drive motor for driving the upper thread catching device and the feeding device and an upper shaft drive motor for moving the needle 7 up and down are provided separately. The shaft drive motor is arranged in the lower arm 3, and the upper shaft drive motor is arranged in the upper arm 2.

Next, the operation of the foldable sewing machine in this embodiment configured as described above will be explained.

Now, FIG. 1 shows the sewing machine in use, with the upper arm 2 and the pillar 4 standing up on the race 5. In this state, the lever 30 is placed in the position shown by the solid line in FIG. Retained. In addition, the first and second work plates 1
The pins 16 and 28 of 5 and 18 are respectively fitted into the recesses 17a and 20a of the stoppers 17 and 20,
The working surface 21 and the upper surface of the cylindrical bed 9 form a wide working surface.

In this state, when storing the sewing machine after completing the specified sewing work, first lift the first and second work plates 15 and 18 and remove the pins 16 from each other.
is removed from the stoppers 17 and 20. Next, while the front plate 13 is slightly rotated toward you, the second work plate 18 is folded downward, and then the first work plate 15 is folded down.
is again locked to the stopper 17 with the pin 16.

Then, as shown by the chain line in FIG. 5, the lever 30
Rotate clockwise in the figure to remove the connecting pin 40.
The distal end portion of is removed from the first positioning hole 38. Next, in this state, while supporting the upper arm 2, rotate the upper arm 2 and the pillar 4 toward the front.
is made to lie down on base 5. In this case, since the second work plate 18 is folded in advance as shown in FIG. 2, the head 8 of the upper arm 2 is accommodated in this open space.

After the upper arm 2 and the pedestal 4 are placed in a horizontal position, the lever 30 is returned to the solid line position shown in FIG. and the lower arm 3 are held in an unrotatable state. By doing this, the sewing machine of this embodiment has a flat form in which the frame body 1 and the base 5 are overlapped as shown in FIG. There is no risk that it will interfere with walking. or,
Since the volume of the sewing machine as a whole in the stored state is reduced, it is very easy to store the sewing machine when not in use or to handle it during packaging and transportation.

On the other hand, when using the sewing machine, rotate the lever 30 in the stored state shown in FIG. 2 to remove the tip of the connecting pin 40 from the second positioning hole 39, lift the upper arm 2, and then 5, the upper arm 2 and pillar 4 are erected. Then, the lever 30 is operated to return, and the tip of the connecting pin 40 is fitted into the first positioning hole 38 to hold the pillar 4 and the lower arm 3 in a non-rotatable state with respect to the base 5. . Thereafter, the second work plate 18 is lifted and locked to the stopper 20 with the pin 28. In this way, the sewing machine can be changed from the stored state to the usable state with a very simple operation.

Second Embodiment Next, a second embodiment of this invention will be described based on FIGS. 7 to 10.

This embodiment differs from the first embodiment in the structure of the frame body 43 and position holding means 47. That is, the frame body 43 of this foldable sewing machine is integrally constructed from the upper arm 2, the lower arm 3, and the pedestal 4, and the frame body 43 is rotatably provided with respect to the base 5.

Therefore, to explain the connection structure between the frame body 43 and the base 5, as shown in FIG.
A pair of first bearing portions 45 are erected at the rear portion of one side, and are configured to sandwich the lower end semi-cylindrical portion 44 of the frame body 43. Also, the semi-cylindrical part 4
As shown in FIG. 10, second bearing portions 46 are formed on both left and right side surfaces of 4. As shown in FIG. The hollow shaft 24 is inserted between the first bearing portion 45 and the second bearing portion 46, thereby rotatably connecting the frame body 43 and the base 5.

On the other hand, as shown in FIGS. 9 and 10, a recess 48 is formed at the upper end of the first bearing part 45, and a connecting pin 52 is inserted into an insertion hole 49 provided in the center thereof. An operating knob 50 serving as a manual operating body is fitted onto the outer end of the connecting pin 52, and a flange 51 for preventing slipping off is formed at the intermediate portion thereof.

In addition, first and second positioning holes 53 are provided at the lower right side of the semi-cylindrical portion 44 of the frame body 43.
54 is formed, and the first positioning hole 53 faces the connecting pin 52 when the frame body 43 is upright, and the second positioning hole 54 faces the connecting pin 52 when the frame body 43 is lying down. They are now facing each other. Then, the first and second positioning holes 53 and 54 and the connecting pin 5
2 constitutes a position holding means 47 in this embodiment, and as the operating knob 50 is operated, the tip of the connecting pin 52 fits into either one of the positioning holes 53 and 54, and the frame body 43
and the base 5 is held in an upright or lying position. Incidentally, in each figure, the members denoted by the same numbers as those in the first embodiment have the same configuration, and therefore the explanation thereof will be omitted.

By the way, the foldable sewing machine constructed as described above can be easily stored and assembled by operating in the same manner as in the above embodiment. Moreover, unlike the previous embodiment, the sewing machine of this embodiment has an upper arm 2, a lower arm 3, and a pillar 4.
Since the upper and lower shafts (not shown) of the sewing machine are integrally formed, the upper and lower shafts (not shown) of the sewing machine can be connected with a simple connecting means such as a timing belt and rotated by a single drive motor. can be made even easier. Furthermore, since the transmission relationship between the needle bar 27 and the feed dog 11 is fixed, the sewing tension can be maintained satisfactorily.

Effects As detailed above, this device forms at least the upper arm and the pedestal integrally, allows the integrated upper arm and pedestal to stand up on the base when the sewing machine is in use, and stands on the base when the sewing machine is not in use. The device is rotatable relative to the base so that the user can lie down,
In order to selectively hold the integrated upper arm and pedestal in an upright position and a lying position, the upper arm and pedestal can be brought into and out of contact with the base in conjunction with a manual operating body. By providing a connecting position holding means, it is lightweight because it does not have a case, and the volume of the sewing machine in the folded state is reduced, making it easy to transport and store. It is a practical idea as a foldable sewing machine because it has the effect of being able to fit the sewing fabric and perform hem stitching.

[Brief explanation of the drawing]

Figures 1 to 6 show a first embodiment of this invention, with Figure 1 being a perspective view of the entire sewing machine in use, and Figure 2 being a perspective view of the sewing machine in storage. , FIG. 3 is a partially cutaway side view showing the main part, FIG. 4 is a partially cutaway front view showing the connection structure of the lower arm and the pillar, and FIG. 5 is a partially cutaway front view showing the position holding means. Figure 6 is A- of Figure 5.
It is a sectional view taken along the A line. Figures 7 to 10 show a second embodiment of this invention, with Figure 7 being a perspective view showing the entire sewing machine in use, Figure 8 being a perspective view showing the sewing machine in its stored state, and Figure 9 being a perspective view showing the sewing machine in its stored state. FIG. 10 is a side view of the main part, and a front view with the main part cut away to show the connection structure and position holding means between the frame body and the base. Frame bodies 1 and 43, upper arm 2, lower arm 3, pedestal 4, base 5, handle 6, head 8, cylindrical bed 9, lever 3 as a manual operation body
0, same operation knob 50, position holding means 42,
47.

Claims (1)

[Claims for Utility Model Registration] 1. An upper arm 2 having a handle 6 attached to the top and a head 8 formed at the end, and a lower arm 3 forming a cylindrical bed 9 for supporting the work cloth. are connected by a pedestal 4, and the frame bodies 1 and 4 are made up of both arms 2 and 3 and the pedestal 4.
3 is supported by a base 5, at least the upper arm 2 and the pedestal 4 are integrally formed, and the upper arm 2 and the pedestal 4 are integrally formed.
is provided rotatably relative to the base 5 so that it can stand up on the base 5 when the sewing machine is in use and lie down on the base 5 when the sewing machine is not in use, and the integrated upper arm 2 and the pedestal 4 are A position holding means that connects the upper arm 2 and the pillar 4 to the base 5 in a manner that allows the upper arm 2 and the pedestal 4 to be connected to and separated from each other in conjunction with the manual operation bodies 30 and 50 in order to selectively hold the base 5 in the upright position and the lying position. A foldable sewing machine characterized in that 42 and 47 are provided. 2. Utility model registration claim 1, in which the upper arm 2 and the pedestal 4 are integrally formed, and the lower arm 3 is divided from the integrated upper arm 2 and the pedestal 4 and fixed to the base 5. Foldable sewing machine as described in section. 3. Request for registration of a utility model in which the upper arm 2, pillar 4, and lower arm 3 are integrally formed to constitute the frame body 43, and the integral frame body 43 is rotatably provided on the base 5. A foldable sewing machine according to item 1 of the scope.