JPH09239172A - Spool device for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily mount a spool pin on a spool holder base and keep compatibility even with a bobbin having small cone diameter via the reduction of the diameter of the spool pin. SOLUTION: This spool device for a sewing machine is formed to have a cylindrical holding member (bush) 24 mountable in a hole 16 formed on a spool holder base 14, and a spool pin 20 capable of being inserted in the holding member 24. In addition, the spool pin 20 is inserted in the holding member 24 mounted in the hole 16 of the spool holder base 14, thereby firmly jointing and holding the pin 20 on the base 14 via the holding member 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine thread stand device for holding a thread spool in a predetermined posture on a receiving surface of a thread stand tray.

[0002]

2. Description of the Related Art In this type of thread stand, a thread stand is generally fixed to a thread stand with a nut. However, fixing the thread-placing rod with nuts is troublesome, and particularly when a large number of thread-placing rods are needed as in a multi-head multi-needle type embroidery sewing machine, a lot of work time is required. As a countermeasure technique, for example, Japanese Patent Laid-Open No. 5-27
A thread stand device disclosed in Japanese Patent No. 2047 is known. According to this technique, the thread stand bar is coupled to the thread stand tray by inserting the engaging element integrally formed at the end of the resin thread stand rod into the hole of the thread stand tray.

[0003]

However, while this technique simplifies the work of attaching the thread stand bar to the thread stand dish, the thread stand bar for restricting the thread spool in a predetermined posture is made of resin. However, in order to secure the rigidity, it is necessary to increase the shaft diameter. However, if the shaft diameter of the thread stand is large, the thread spool cannot be set when the cone diameter of the thread spool is small.

The object of the present invention is to make it easy to attach the thread stand to the thread stand and to use a material having high rigidity such as metal for the thread stand, and to reduce the shaft diameter to reduce the cone diameter. It is also possible to support small thread spools.

[0005]

DISCLOSURE OF THE INVENTION In a thread stand device of a sewing machine, the present invention provides a tubular holding member which can be attached to a hole formed in a thread stand tray, and a thread which can be inserted into the holding member. A thread stand, and by inserting the thread stand into a holding member attached to the hole of the thread stand, the thread stand is firmly coupled and held to the thread stand through the holding member. And As described above, since the thread stand is firmly held in the thread stand by the holding member without being restricted in its material, the work of attaching the thread stand to the thread stand is simple and the thread stand is simple. The shaft diameter can be reduced depending on the material of the rod. As a result, it is possible to sufficiently cope with a thread spool having a small cone diameter.

[0006]

Embodiments of the present invention will be described below. FIG. 1 is a perspective view showing a multi-head multi-needle type embroidery sewing machine. As shown in this drawing, a plurality of (four) sewing heads 12 are provided on the front surface of the frame 10. A thread stand 14 is fixed to the upper surface of the frame 10 behind each of these sewing machine heads 12.

FIG. 2 is an enlarged perspective view showing a part of the thread stand plate 14. As is clear from this drawing, a plurality of thread stand bars 20 are provided on the receiving surface (upper surface) of the thread stand tray 14.
Is set up. Thread spools 30 (phantom lines in FIG. 2) for supplying threads to a plurality of needle bars (sewing needles) of the sewing head 12 corresponding to the thread stand bars 20 are set on the thread stand bars 20. 3 is an exploded perspective view showing the mounting structure of one thread stand 20, and FIG. 4 is the same thread stand 20.
It is sectional drawing of the state which attached to the thread stand tray 14. Thus, the thread stand bar 20 is attached to the thread stand tray 14 by the bush 24 used as a holding member.

The bush 24 is made of resin and has a cylindrical body portion 28 inserted into the hole 16 formed in the thread stand 14 and a flange portion formed on the upper edge portion of the body portion 28. 26 and. The bush 24 is formed with a continuous slit 29 extending from the flange portion 26 to the body portion 28, whereby the bush 24 has a split shape (FIG. 3).

FIG. 5A and FIG. 5B show holes 16 in the thread stand plate 14.
It is sectional drawing which expanded and represented the relationship with the bush 24. As is apparent from this drawing, a fitting portion 28a having an outer diameter substantially the same as the inner diameter of the hole 16 is formed on the outer periphery of the body portion 28 of the bush 24. This fitting portion 28a
Is formed downward from the lower surface of the flange portion 26, and the vertical width thereof is set to be substantially the same as the plate thickness of the thread stand tray 14. Further, the outer periphery of the body portion 28 below the fitting portion 28a has a diameter slightly larger than that of the fitting portion 28a.
b.

The inside of the body portion 28 is an insertion hole 28c for the thread stand 20, the upper end portion of which is open, and the lower end portion is formed with a bottom portion having an air vent hole 28d. Moreover, the insertion hole 28c has a shape in which the open portion at the upper end has an inner diameter slightly larger than the outer diameter of the thread stand 20 and the inner diameter gradually decreases downward.

In the thread stand configured as described above, the thread stand bar 20 is attached to the thread stand tray 14 by using FIG.
As shown in (A), the body portion 28 of the bush 24 is pushed into the hole 16 of the thread stand tray 14 until the flange portion 26 comes into contact with the receiving surface 15 of the thread stand tray 14. As a result, the fitting portion 2 of the body 28 is attached to the edge of the hole 16.
8a is positioned, and the bush 24 is held by the thread stand tray 14 with the thread stand tray 14 sandwiched between the flange portion 26 and the upper portion of the locking portion 28b.

Next, as shown in FIG.
8, the thread stand 20 is inserted into the insertion hole 28c of
Insert until it hits the bottom of 8c. As a result, the inner diameter of the insertion hole 28c, the inner diameter of which decreases downward, is spread by the thread stand 20 and, as a result, the engaging portion 2
The outer diameter of 8b is expanded as shown in FIG. Therefore, the bush 24 is firmly connected and held to the thread stand tray 14, and the thread stand bar 20 is firmly held mainly by the inner peripheral portion of the fitting portion 28a of the body portion 28.

As described above, the work of attaching the thread stand bar 20 to the thread stand dish 14 becomes very simple as compared with the conventional technique using a nut or the like, and in particular, as in the present embodiment, a large number of thread stand bars are installed. It is effective when the rod 20 is required. Since the thread-placing rod 20 is not limited in its material, a metal having high rigidity is usually used, and the shaft diameter can be reduced as necessary. This means that the thread stand bar 20 that can handle thread spools 30 with a small cone diameter
Can be provided.

The bush 24 can be attached to the hole 16 of the thread stand 14 and the thread stand bar 20 can be inserted into the bush 24 by using a plastic hammer or the like in order to quickly perform the respective operations. . Further, in the present embodiment, the case where the thread stand device is applied to the multi-head, multi-needle type embroidery sewing machine has been described, but the thread stand device is applicable to all sewing machines using the thread stand tray 14 and the thread stand bar 20. Applicable.

[0015]

As described above, the present invention simplifies the work of attaching the thread stand bar to the thread stand plate, and if the thread stand bar is made of a material such as metal to reduce the shaft diameter, a thread spool having a small cone diameter can be obtained. Can also handle.

[Brief description of drawings]

FIG. 1 is a perspective view showing a multi-head, multi-needle type embroidery sewing machine.

FIG. 2 is an enlarged perspective view showing a part of the thread stand plate 14.

FIG. 3 is an exploded perspective view showing a mounting structure for one thread stand bar.

FIG. 4 is a sectional view of the same thread stand bar attached to a thread stand tray.

FIG. 5 is an enlarged sectional view showing the relationship between the hole of the thread stand and the bush.

[Explanation of symbols]

 14 thread stand dish 20 thread stand bar 24 bush (holding member) 30 thread spool

Claims (1)

[Claims] 1. A thread stand device of a sewing machine for holding a thread spool on a receiving surface of a thread stand tray in a state of being regulated in a predetermined posture by a thread stand tray and a thread stand bar provided on a receiving surface side thereof. In a holding member attached to a hole of the thread stand, the holding member having a tubular shape attachable to the hole formed in the thread stand and a thread stand bar capable of being inserted into the holding member. A thread stand of a sewing machine, characterized in that the thread stand is firmly connected to and held by a holding member by a holding member by inserting the thread stand into the thread stand.