JPH02131Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a portable sewing machine, and is particularly useful in applications such as sewing and closing bag openings at grain bagging sites. This invention relates to a portable sewing machine that can be operated by holding the handle in the hand.

[Prior art and problems to be solved by the invention] Conventionally, as a portable sewing machine of this type,
A portable electric bag closing machine disclosed in Japanese Patent No. 30449 is known. In this conventional portable sewing machine, the motor for driving the sewing machine, the spool pin for supporting the spool, the thread guide for guiding the thread supplied from the spool, etc. are removed from the sewing machine main body. It was protruding greatly towards the direction. Therefore, the entire device becomes large in size, and when an operator holds it in his hand and operates it, each of the protrusions gets in the way, making it difficult to handle and causing problems in terms of operability.

In addition, the thread guide of this conventional portable sewing machine is
Since the thread guide is provided at the two open ends of the T-shaped support, there is a problem that when the thread supplied from the bobbin winder becomes loose, the thread tends to become entangled between the open end of the support and the thread guide. Ta.

[Purpose of the invention] This invention was devised to solve the problems of the conventional technology, and its purpose is to provide a portable sewing machine that is compact, easy to handle, and does not allow threads to get tangled. be.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes an arm portion that supports a sewing needle in a vertically movable manner, and a bed portion that extends substantially parallel to the arm portion. , a frame including a handle portion extending in a direction transverse to the longitudinal direction of the arm portion at the rear of the proximal end of both portions, and an output shaft for vertically moving the sewing needle within the frame; It has a motor whose axis is arranged substantially parallel to the longitudinal direction of the arm section and the bed section, and a plurality of spool pins that support a plurality of thread winding bodies, and whose axes are parallel to the longitudinal direction of the arm section. The supporting device is supported by the arm so that the tip of the spool pin faces toward the handle, and the plurality of spool pins are arranged in a direction substantially perpendicular to the longitudinal direction of the handle. The supports are erected at intervals from each other, the supports are supported at an intermediate portion of the arm, and the supports are located closer to the handle than the support. It includes a thread guide rod that is bent into a substantially triangular shape and has a thread insertion hole, and a single mounting plate for attaching both ends of the thread guide rod to the frame.

[Function] Due to the above structure, this device is compact and easy to handle, and there is no possibility of threads getting tangled.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In Figure 2, frame 1 of the portable sewing machine
On one side of the base 11, an arm portion 12 protrudes from one end of the base 11, and a bed portion 13 protrudes from the other end in parallel with each other. Further, on the other side of the base 11, a housing part 14 for accommodating the motor 2 is protruded from the same end as the bed part 13, and a handle part 15 is connected to the same end as the arm part 12 via a leg part 15a. However, the housing part 14 is connected as the other leg near the same end as the bed part 13. That is, the handle portion 15 is connected to the arm portion 12.
It extends long in the direction in which the bed portion 13 and the bed portion 13 are lined up, and is located approximately at right angles to both portions. Preferably, as shown in FIG. 2, the end portion on the arm portion 12 side is slightly inclined so as to approach the arm portion 12 side.

The arm portion 12 is provided with a needle 3 and a presser foot 4 at its tip, and the bed portion 13 is provided with a needle plate 5 and a feed dog 6. The motor 2 is arranged within the housing part 14 so that its output shaft is substantially parallel to the longitudinal direction of the arm part 12 and the bed part 13. The output shaft of the motor 2 drives the needle 3, feed dog 6, etc. via a power transmission device (not shown) housed in the base 11 to perform sewing work, as in a normal sewing machine.

The face plate 16 is attached to the end surface of the arm portion 12 so as to cover the drive mechanism for the needle 3 and presser foot 4. As shown in FIGS. 1 and 3, the support 7 supports the bobbin body 8, and extends approximately from the corner of the feed-out side of the workpiece (left side in FIG. 1) at the outer intermediate portion of the arm portion 12. It extends diagonally outward. When the portable sewing machine is a double chainstitch sewing machine, as shown in the drawing, two thread winders 8, 8 are used for the upper thread and the lower thread, so the support tool 7 is attached to the tip of the support tool 7. 7 and a T-shaped auxiliary plate 7a is attached with screws 7b. On both sides of the auxiliary plate 7a, spool pins 7c, 7c are erected approximately parallel to the arm portion 12 and toward the handle portion 15, with an interval in a direction approximately perpendicular to the longitudinal direction of the handle portion 15. has been done. Note that the support 7 is attached to the face plate 1
6 and can be attached to and detached from the arm portion 12 together with the face plate 16.

The spool body 8 is fixed by being tightened with a wing nut 7d that is inserted through the spool pin 7c and screwed into the tip of the spool pin 7c.

The thread guide rod 9 is made by bending a metal bar into a substantially triangular shape.
The legs 15a of the handle portion 15 are attached to both ends of the bar extending from one vertex of the triangle by a single mounting plate 20.
It is mounted between the The thread guide rod 9
, thread insertion holes 9a and 9b are provided near the other two vertices of the triangle so as to be located approximately on the extension line of the two spool pins 7c and 7c, and one side of the feeding side of the workpiece is provided. A thread insertion hole 9d is also provided in the thread insertion hole 9d.

The thread led out from the one located on the feeding side of the material to be sewn (the right side in FIG. 1) of the two thread windings 8, 8 passes through the thread insertion hole 9a opposite to it, and
The thread is supplied to the needle 3 through thread guides 21 and 22 provided on one side of the frame 1 on the feeding side of the workpiece. The thread led out from the other thread winding body 8 passes from the thread insertion hole 9b to the thread insertion hole 9d on the other side, passes through the thread guide 21 on the same side of the frame 1, and is supplied to the bottom of the throat plate 5.

In order to manufacture the thread guide rod 9 in a small size, the support 7 has its tip inclined at an obtuse angle so that the tip of the spool pin 7c approaches the arm portion 12 side.

The portable sewing machine is used by holding the handle portion 15 in the hand with the arm portion 12 and bed portion 13 facing substantially downward, as shown in FIG. When sewing a heavy item such as closing the opening of the bag 23, the sewing is performed while moving the portable sewing machine according to the feeding operation by the feeding dog 6.

In this work, the operator stands on the side of the portable sewing machine on the feeding side of the workpiece. As shown in FIG. 1, the thread winding body 8 and thread guide rod 9 are
Since it is located so as not to overlap the side surface of the portable sewing machine, the operator can work while checking the sewing state. Since the smaller diameter side of the conical shape of the spool body 8 faces upward, the thread does not unravel and loosen from the spool body 8 even when the sewing machine is shaken. 9. It is also easy to check the condition of the yarn fed through the yarn guides 21 and 22.

[Effects of the invention] As explained above, according to the invention, (A) the motor is arranged in the frame so that its output shaft is approximately parallel to the longitudinal direction of the arm section and the bed section; The longitudinal direction and the longitudinal directions of the arm portion and the bed portion are substantially parallel, and the motor is compactly housed within the frame without protruding outward significantly.

(B) Since the support having the spool pin was supported at the middle part of the arm part so that the tip of the spool pin faces toward the handle part, the spool pin is in the space from the middle part of the arm part to the handle part. Therefore, the spool pin does not protrude outward beyond the handle portion.

(C) Since a plurality of spool pins are erected on the support at intervals in a direction substantially perpendicular to the longitudinal direction of the handle, any one of the plurality of spools may protrude outward significantly. There is no.

(D) The thread guide rod that guides the thread from the spool to the needle is bent into a triangular shape, so when the thread guide rod is attached to the frame, there is no open end to the thread guide rod. Even if the thread becomes loose, the thread will not get tangled around the thread guide rod.

(E) Since both ends of the triangularly bent thread guide rod are attached to the frame using a single mounting plate, the mounting structure can be simplified.

It has this excellent effect.

[Brief explanation of the drawing]

Fig. 1 is a left side view of a portable sewing machine embodying this invention, Fig. 2 is a front view, Fig. 3 is a plan view, and Fig. 4 is a perspective view showing the state of use. In the figure, 1 is a frame, 2 is a motor, 3 is a needle, 7
1 is a support, 7c and 7c are spool pins, 8 and 8 are bobbins, 9 is a thread guide rod, 9a to 9d are thread insertion holes, 1
2 is an arm portion, 13 is a bed portion, 15 is a handle portion, and 20 is a mounting plate.

Claims (1)

[Claims for Utility Model Registration] Arm portion 1 that supports sewing needle 3 in a vertically movable manner
2, a bed part 13 that faces and extends substantially parallel to the arm part 12, and a handle part 15 that extends in a direction transverse to the longitudinal direction of the arm part 12 at the rear of the proximal ends of both parts 12 and 13. and a motor 2 whose output shaft axis is arranged approximately parallel to the longitudinal direction of the arm portion 12 and the bed portion 13 in order to move the sewing needle 3 up and down within the frame 1. , a plurality of spool pins 7 supporting a plurality of bobbin bodies 8, 8
c, 7c, and the arm is arranged so that the axes of the spool pins 7c, 7c are approximately parallel to the longitudinal direction of the arm portion 12, and the tips of the spool pins 7c, 7c face toward the handle portion 15 side. The support 7 supported by the handle portion 12 and the plurality of spool pins 7c, 7c are erected on the support 7 at intervals in a direction substantially perpendicular to the longitudinal direction of the handle portion 15. The support tool 7 is supported by the intermediate portion of the arm section 12, The support tool 7 is arranged closer to the handle section 15 than the support tool 7, and is bent into a substantially triangular shape, and the thread can be inserted through the support tool 7. A portable sewing machine characterized by comprising a thread guide rod 9 having holes 9a to 9d, and a mounting plate 20 for attaching both ends of the thread guide rod 9 to a frame 1.