JP2008295484A - Spool holder of sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spool holder of a sewing machine which is capable of preventing the unwinding and loosening of threads from thread spools by inclining spool pins in use and reducing the width of an installation space by vertically changing the spool pins in nonuse. <P>SOLUTION: This spool holder includes a support 5, a spool holder base plate 7 attached to the support 5 and having a plurality of vertically raised spool pins 6, and an attitude changeover mechanism 8 capable of changing over the spool holder base plate 7 between a horizontal attitude and an inclined attitude. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a thread stand device for a sewing machine, and more particularly to a thread stand device for a sewing machine in which a thread stand base plate in which a plurality of thread stand bars are erected vertically can be switched between a horizontal posture and an inclined posture.

Conventionally, a thread stand device for a sewing machine is generally installed on a table 41 of a sewing machine 40 as shown in FIG. 8, and a thread stand is placed on a thread stand base plate 43 that is horizontally fixed to a column 42 standing on the table 41. Although the rod 44 is erected vertically (see, for example, Patent Document 1), when the yarn (not shown) is pulled out from the yarn spool 45 attached to the vertical spool pin 44, the yarn is pulled from the yarn spool 45. It is easy to loosen and loosen easily and slip off from the yarn spool 45, causing problems such as thread breakage and skipping. This phenomenon is particularly remarkable when the thread is a thick thread, a thread that is weakly tightened, a nylon thread, a rubber thread, or the like.
On the other hand, as shown in FIGS. 9 and 10, the thread stand 47 of the sewing machine 46 supports the thread stand 49 on which the thread stand 48 is erected vertically and supports the table 50 on the table 50 in the inclined posture by the support 51. When the standing bar 48 is tilted (see, for example, Patent Documents 2 and 3), the thread spool 52 attached to the tilted thread spool 48 is inclined, so that the thread is loosened and loosened from the thread spool 52. It is possible to prevent dripping or sliding down.

Japanese Patent Laid-Open No. 10-121353 Japanese Utility Model Publication 3-33336 Japanese Utility Model Publication No. 7-9272

However, as shown in FIGS. 9 and 10, in the thread stand 47 that tilts the thread stand 48 by installing the thread stand 49 in which the thread stand 48 vertically stands in an inclined posture, The yarn path mounting arm 54 that supports the 49 thread path plates 53 protrudes from the end of the table 50, and the amount S1 (see FIG. 10) of the thread path attachment arm 54 in the case where the thread stand base plate 43 is installed horizontally as shown in FIG. Since the protruding amount S2 of the thread stand base plate 43 from the end of the table 41 is very large, there is a problem that the installation space is widened and there is a danger that it disturbs the passage of the operator.
Further, as shown in FIG. 8, an upright type thread stand device in which a thread stand base plate 43 in which a thread stand bar 44 is erected vertically is installed horizontally, and the thread stand 49 is inclined as shown in FIGS. If two types of the tilting type thread stand 47 installed in the factory are manufactured, the manufacturing cost increases.

  The present invention has been made to solve such a problem, and when the thread is loosened, slackened or slipped from the thread spool, and falls, the specification of inclining the spool pin can be taken. When you want to narrow the installation space of the device, you can switch to the specification that makes the spool pin vertical, and one thread stand device prevents the thread from loosening and slipping from the spool, and reduces the installation space. It is an object of the present invention to provide a thread stand device for a sewing machine that can immediately respond to safety.

The present invention will be described with reference to the reference numerals shown in FIGS. 1 to 7 in order to facilitate understanding of the contents of the present invention. In a thread stand device for a sewing machine having a thread stand base plate (7) vertically installed with a plurality of thread stand bars (6), the thread stand base plate (7) is placed in a horizontal posture and an inclined posture. And a posture switching mechanism (8) that can be switched between.
According to the thread stand device of the sewing machine configured as described above, when the thread comes loose from the thread spool attached to the thread stand (6) and is slackened or slipped, the thread stand by the posture switching mechanism (8). It is possible to incline the spool pin (6) by switching the base plate (7) to the inclined posture, thereby preventing the thread from loosening and slipping off from the thread spool. If there is no risk of loosening from the thread spool attached to the thread spool (6), or if it is desired to reduce the installation space, the thread stand base (7) can be leveled by the posture switching mechanism (8). By switching to the posture, the spool pin (6) can be made vertical, which can solve problems such as a large installation space.

  In the thread stand device for the sewing machine according to claim 1, the posture switching mechanism (8) rotates the thread stand base plate (7) about the support shaft (12) with respect to the column as described in claim 2. It is possible to adopt a configuration provided with a pivot support means (13) that is supported and a fixing / release means (14) that can lock and unlock the thread stand base plate (7) at a predetermined pivot angle. it can. According to this configuration, the unlocking operation of the thread stand base plate (7) by the fixing / releasing means (14) and the rotation around the support shaft (12) of the thread stand base plate (7) by the rotation support means (13). The thread stand base plate (7) can be easily switched to a horizontal posture or an inclined posture by a moving operation.

  A thread stand device for a sewing machine according to a second aspect includes a support shaft (12) in which a rotation support means (13) is attached to a thread stand base plate (7) and a strut (5). ) And a bracket (18) that rotatably supports the support shaft (12). The bracket (18) includes a first screw hole (19) for holding a horizontal posture and a first screw hole for holding a tilted posture. Two screw holes (20) are provided, and the fixing / releasing means (14) is fixed to the support shaft (12). The first set hole (24) for holding the horizontal posture and the second set hole (for holding the tilted posture) 25) and the first screw hole (19) and the first set hole (24) that match each other, or the second screw hole (20) and the second set hole (25). A configuration including a set bolt (27) to be tightened can be employed. According to this configuration, the first screw hole (19) and the first set hole (24) of the bracket (18) or the second screw hole (20) and the second set hole (25) of the bracket (18) are set. The thread stand base plate (7) can be easily and reliably switched between the horizontal posture and the tilted posture by the detachment operation of the bolt (27) and the turning operation of the thread stand base plate (7) around the support shaft (12). .

  The thread stand device for a sewing machine according to any one of claims 1 to 3 can adopt a configuration in which the thread stand base plate (7) is formed of a transparent material as described in claim 4. . According to this structure, it becomes easy to visually recognize the remaining yarn amount of the thread spool mounted on the spool pin (6) from the bottom side of the spool stand base plate (7).

  According to the present invention, there is an effect that the spool pin can be easily switched to the vertical or inclined posture in response to a situation where the yarn is loosened and loosened from the yarn spool or the installation space becomes large.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a thread stand device for a sewing machine according to the present invention will be described below with reference to the drawings. 1 is a perspective view showing a thread stand of a sewing machine according to an embodiment of the present invention in a state where a thread stand base plate is in a horizontal position, FIG. 2 is a side view of the thread stand of FIG. 1, and FIG. FIG. 4 is a perspective view showing a thread stand device of a sewing machine according to an embodiment of the present invention in a state in which a thread stand base plate is inclined, and FIG. 5 is a thread stand of FIG. 6 is a perspective view of the posture switching mechanism of the yarn stand device of FIG. 4, and FIG. 7 is an exploded perspective view of the posture switching mechanism of the yarn stand device of FIG.

  1 and 4, 1 is a sewing machine, 2 is a thread stand according to the present invention, and 3 is a thread tension mechanism in which a plurality of thread tension dials 3a are arranged. The thread stand device 2 includes left and right struts 5 erected on a table 4 of the sewing machine 1, a thread stand base plate 7 that is attached to the left and right struts 5 and that has a plurality of thread spool bars 6 erected vertically, Posture switching that can be switched between a horizontal posture perpendicular to the column 5 (see FIGS. 1 to 3) and an inclined posture (see FIGS. 4 to 6) inclined at a certain inclination angle with respect to the column 5 And a mechanism 8. A thread spool 9 is inserted and attached to the thread spool 6. A yarn path plate 10 having a guide hole 10 a is disposed above the thread spool bar 6, and the yarn path plate 10 is supported by a thread path mounting bracket 11 erected on both sides of the thread stand base plate 7.

  As shown in FIG. 7, the posture switching mechanism 8 includes a rotation support means 13 that supports the thread stand base plate 7 so as to be rotatable about the support shaft 12 with respect to the left and right support columns 5, and the thread stand base plate 7. And a fixing / releasing means 14 that can be locked and unlocked at the rotation angle.

  As shown in FIG. 7, the rotation support means 13 includes a support shaft 12 made of a pipe material attached to the bottom side of the thread stand base plate 7 with left and right support bearings 15, and each support 5 with each base end on the left and right And left and right brackets 18 which are fixed by bolts 16 (see FIG. 3) and rotatably support shafts 12 through shaft holes 17 at the respective ends. A first screw hole 19 for holding a horizontal posture and a second screw hole 20 for holding a tilted posture are provided below the shaft hole 17 on the distal end side of the bracket 18. On the other hand, the fixing / releasing means 14 includes left and right rotation stoppers 26 and left and right set bolts 27. The rotation stopper 26 is inserted into an end portion of the support shaft 12 projecting from the shaft hole 17 through the shaft hole 21 having an expandable / contractible diameter, and is fixed by a bolt 22 and a nut 23, and the other end is used for maintaining a horizontal posture. It has a set hole 24 and a second set hole 25 for maintaining an inclined posture. The set bolt 27 is inserted through the first screw hole 19 and the first set hole 24 that match each other, or through the second screw hole 20 and the second set hole 25. The set bolt 27 is provided with a knob 27a for facilitating picking. A cap 12a is fitted to the end of the support shaft 12 protruding from the shaft hole 17.

  When appropriate, as shown in FIGS. 1 to 3, when the thread stand 6 is used vertically, the thread stand base plate 7 is rotated around the support shaft 12 to be in a horizontal position for holding the horizontal position. By aligning the first screw hole 19 and the first set hole 24 for maintaining the horizontal posture, and inserting and tightening the set bolt 27 into these holes 19 and 24, the thread stand base plate 7 is held in the horizontal posture state, The spool pin 6 can be in a vertical posture. In this way, the thread stand base plate 7 is rotated about the support shaft 12 to be in a horizontal posture, and then the set bolt 27 is inserted into the first screw hole 19 and the first set hole 24 of the bracket 18 and tightened. By operation, the thread stand base plate 7 can be easily and reliably switched to the horizontal posture.

When the yarn comes loose from the thread spool 9 and loosens or slides down, the spool pin 6 is tilted as shown in FIGS. 4 to 6, but at this time, the set bolt 27 is used as the first screw. The thread stand base plate 7 is extracted from the hole 19 and the first set hole 24, and is rotated to a tilted posture by rotating it by a predetermined angle (for example, 70 °) in the direction of arrow A around the support shaft 12 from the horizontal posture of FIG. By aligning the second screw hole 20 for maintaining the posture with the second set hole 25 for maintaining the inclined posture and inserting and tightening the set bolts 27 into these holes 20 and 25, the thread stand base plate 7 is in the inclined posture state. The spool pin 6 can be in an inclined posture. In this way, the thread stand base plate 7 is rotated around the support shaft 12 to be inclined, and then the set bolt 27 is inserted into the second screw hole 20 and the second set hole 25 of the bracket 18 and tightened. By operation, the thread stand base plate 7 can be easily and reliably switched to the inclined posture.
After use, the installation space can be narrowed by switching the position of the thread stand base plate 7 in the horizontal position and the position of the thread stand bar 6 in the vertical direction as described above.

In the illustrated example, the thread stand base plate 7 of the thread stand device 2 is composed of a base plate body 7a divided into front and rear parts, and a joining plate 7b in which the front and rear base plate bodies 7a and 7a are joined together on the back side thereof. The plate body 7 a and the joining plate 7 b are formed of a transparent material such as acrylic or polycarbonate so that the yarn remaining amount of the yarn spool 9 can be easily seen from the bottom side of the thread stand base plate 7. The thread stand base plate 7 may be formed of a transparent single plate instead of the base plate body 7a and the joining plate 7b.
As shown in FIGS. 1 and 4, the thread stand device 2 may be installed behind the sewing machine 1 in addition to being installed on the left and right sides of the table 4 of the sewing machine 1. Even when the thread stand 2 is installed behind the sewing machine 1, if the thread stand base plate 7 is made of a transparent material, the operator on the front side of the sewing machine 1 can easily keep the remaining amount of yarn in the thread spool 9. Can be visually recognized.

  As shown in FIGS. 1 and 4, when the thread stand base plate 7 is installed in the upper and lower stages as the thread stand device 2, the upper stage stand is used instead of enabling the posture change of the thread stand base plate 7 in both the upper and lower stages. It is also possible to change the posture of only the base plate 7 or only the lower thread stand base plate 7.

1 is a perspective view showing a thread stand device for a sewing machine according to an embodiment of the present invention in a state where a thread stand base plate is in a horizontal position. It is a side view of the thread stand device of FIG. It is a perspective view of the attitude | position switching mechanism of the thread stand device of FIG. 1 is a perspective view showing a thread stand device for a sewing machine according to an embodiment of the present invention in a state where a thread stand base plate is in an inclined posture. It is a side view of the thread stand device of FIG. It is a perspective view of the attitude | position switching mechanism of the thread stand device of FIG. It is a disassembled perspective view of the attitude | position switching mechanism of the thread stand device of FIG. It is a side view of the thread stand device of the conventional sewing machine. It is a top view of the thread stand device of the other conventional sewing machine. FIG. 10 is a side view of the yarn stand device of FIG. 9.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sewing machine 2 Thread stand device 5 Strut 6 Thread stand bar 7 Thread stand base plate 8 Posture change mechanism 12 Support shaft 13 Rotation support means 14 Fixing / release means 18 Bracket 19 1st screw hole 20 2nd screw hole 24 1st set Hole 25 Second set hole 26 Rotation stopper 27 Set bolt

Claims (4)

  In a thread stand device of a sewing machine having a support and a thread stand that is attached to the support and has a plurality of spool pins vertically installed, the thread stand can be switched between a horizontal posture and an inclined posture. A sewing machine thread stand comprising a simple posture switching mechanism.   The posture switching mechanism is capable of locking and unlocking the thread stand base plate at a predetermined rotation angle, and a rotation support means that supports the thread stand base plate so as to be rotatable about a support shaft with respect to the support column. The sewing machine thread stand according to claim 1, further comprising a fixing / releasing means.   The rotation support means includes the support shaft attached to the thread stand base plate, and a bracket fixed to the support column and rotatably supporting the support shaft. 1 screw hole and a second screw hole for holding the inclined posture are provided, and the fixing / releasing means is fixed to the support shaft and has a first set hole for holding the horizontal posture and a second set hole for holding the inclined posture. The rotation stopper which has, The said 1st screw hole and 1st set hole which match each other, The set bolt inserted through the said 2nd screw hole and the 2nd set hole, and tightening is provided. Sewing machine thread stand.   The thread stand of a sewing machine according to any one of claims 1 to 3, wherein the thread stand base plate is formed of a transparent material.

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