KR101471985B1 - Hook alignment device for sewing machine - Google Patents

Abstract

The present invention improves the workability of the gauze fitting.

An upper shaft 12 connected to the sewing machine motor 11 and adapted to move up and down the needle bar 14 rotating by the driving of the sewing machine motor to hold the needle 15, A lower shaft 31 provided at the tip of the lower shaft and rotating on the shaft together with the rotation of the lower shaft, and a rotary shaft 36 connected to the upper shaft and the lower shaft to drive the upper shaft A sewing machine (1) provided with a power transmitting portion (17) for transmitting to a sub-shaft is provided with an operating member which is connected to a lower shaft and rotates the lower shaft on the shaft to adjust the rotational position of the shaft, , And the operator is provided at a position that can be manipulated while visually checking the vertical position of the needle and the rotational position of the kiln.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hook-

The present invention relates to a jigger for a sewing machine for adjusting the rotational operation of the jig such that the jig is rotated at a predetermined timing with respect to the vertical movement of the needle.

4, the sewing machine 100 includes an upper shaft 111 connected to the motor M for rotation and a lower shaft 121 connected to the upper shaft 111 via a timing belt T A needle device 110 for vertically moving the needle bar 113 in conjunction with the upper shaft 111 and a rotary mechanism 120 for rotating the needle bar 113 in a full rotation or half rotation in cooperation with the lower shaft 121 .

A needle bar upper and lower mechanism 112 composed of a cam or a link is provided at the tip of the upper shaft 111 and a needle 114 is provided at the lower end of the needle bar 113, 112 so as to be vertically movable.

The rotary shaft 120 is provided with a gear box 122 for converting the rotation of the lower shaft 121 into a swing motion, a rotary shaft 123 connected to the gear box 122, A shaft 126 is supported at the tip of the shaft 123.

In the sewing machine having such a configuration, as the motor is rotated, the needle 114 is moved upward and downward, and at the same time, when the kiln 126 rotates and the needle 114 starts to rise from the bottom dead center (lowest point) A needle thread loop is caught by the sharp end of the kiln 126 to interlock a needle thread (not shown) of the needle 114 and a bottom thread (not shown) of the drum 126 to form needle stitches.

Accordingly, the sewing worker needs to regularly perform a job called a " gum alignment work ". The gauze fitting operation is to adjust the phase so that the point near the tip of the vertically moving needle and the pointed end of the gauges intersect at a predetermined relative position (timing).

Specifically, this can be accomplished by providing a dial as described in Patent Document 1, for example. 4, the operation dial 132 connected to the upper shaft 111 through the bevel gears 130 and 131 is provided, and the rotary shaft 126 is rotatably mounted on the lower shaft 121 The tip of the needle 114 and the pointed end of the jar 126 are moved to a predetermined timing (position) by rotating the operation dial 132 in a state in which the needle 114 is moved up and down, , And then the kiln 126 is fixed to the lower shaft 121. In this case,

[Patent Document 1] Japanese Patent Publication No. 3614550

As described above, in the conventional jig matching operation, since the operation dial 132 is provided on the sewing machine arm above the sewing machine table, and the kiln 126 is installed on the sewing machine bed below the sewing machine table, It is necessary to operate the operation dial 132 by lifting up the hand while checking the kiln with eyes and it is necessary to work in an unreasonable posture so that the work is not smoothly performed and the work efficiency is lowered or the fatigue of the worker is increased .

Further, when the sewing machine table is large, the table is disturbed and it is difficult to operate the operation dial 132 located above the table. In particular, it is difficult to operate the operation dial 132 in the XY direction in synchronization with the vertical movement of the needle The sewing machine table is made large in order to arrange the cloth feeding device. Therefore, the operator can not grasp the operation dial 132 by hand and can not look down the kiln under the sewing machine table, 114, and the position of the kiln 126, alignment by dial operation, confirmation of its position, and so on. Therefore, it is difficult to improve workability of the gimbal fit.

Therefore, it is an object of the present invention to improve the workability of the gauze fitting and to make the gauze fitting work sure and simple even if the size of the sewing machine table becomes large.

According to a first aspect of the present invention, there is provided a sewing machine comprising: a top shaft rotatably provided on a sewing machine arm;

A lower shaft rotatably installed on the sewing machine bed,

A needle moving up and down in association with rotation of the upper shaft;

A rotary shaft integrally rotatable with the lower shaft or rotatable with respect to the lower shaft,

And a power transmission unit for connecting the upper shaft and the lower shaft to rotate the upper shaft and the lower shaft in synchronism with each other. The upper shaft is rotated while rotating the upper shaft to move the needle vertically, A jamming apparatus for a sewing machine capable of adjusting a jam to cross at a predetermined timing,

And an operating member which is connected to the lower shaft so as to rotate the lower shaft by a rotating operation and is manually operable is provided on the sewing machine bed portion.

According to a second aspect of the present invention, in the sewing machine according to the first aspect, the operating member is connected to the lower shaft by a support shaft orthogonal to the lower shaft, And is fixed.

According to a third aspect of the present invention, in the sewing machine according to the second aspect of the invention, the support shaft is connectable to an end of a lower shaft which is close to the kiln.

According to the invention as set forth in claim 4, in the sewing machine according to claim 1, the operating member is connected to the lower shaft by a support shaft parallel to the lower shaft, As shown in Fig.

According to the invention as set forth in claim 5, in the sewing machine according to claim 4, the operating member is arranged in parallel with the kiln in the same direction.

According to the invention as set forth in claim 1, in the case where the operation member connected to the lower shaft is provided in the sewing machine bed portion, when the operation of the operation member provided on the sewing machine bed portion is performed, the upper shaft is rotated through the power transmitting member Since the operator can move the needle up and down, the operator can adjust the position of the kiln while keeping the lower posture and checking the kiln and the needle with the eyes, so that the operator can easily perform the gauze fitting in an unimpeded posture.

In addition, even if the sewing machine table or the like becomes large, the operator can perform the work while confirming with the eyes in the same posture. Therefore, it is not necessary to alternately repeat the positioning of the needle tip and the tip of the cutting edge and the confirmation thereof, The customized work can be made sure and simple.

According to the invention described in Claims 2 and 3, since the worker does not take an unreasonable posture, the gauze alignment operation can be performed more simply and accurately.

According to the invention described in claims 4 and 5, since the operator can perform the operation while visually confirming the kiln and the operation member at the same time, the gauze alignment operation can be performed more simply and accurately.

Best Mode for Carrying Out the Invention Hereinafter, the best mode of a sewing machine according to the present invention will be described in detail with reference to the drawings.

<Configuration of sewing machine>

1 and 2, the sewing machine 1 includes a sewing machine motor 11 serving as a driving source of each part, and an output shaft 11a connected to the output shaft 11a of the sewing machine motor 11. The sewing machine motor 11, A needle bar upper and lower mechanism 13 provided at the tip of the upper shaft 12 and composed of a cam or a link and a needle bar upper and lower mechanism 13 that is movable up and down And a needle 15 provided at the tip of the needle bar 14. The needle bar 14 is provided with a needle bar 14,

A pulley 16 is fixed to the output shaft 11a of the sewing machine motor 11 and rotates on the shaft together with the rotation of the output shaft 11a. The pulley 16 is provided with a timing belt 17 as a power transmitting portion for transmitting the rotation of the output shaft 11a from the upper shaft 12 to the lower shaft 31. [ The timing belt 17 is appropriately tensioned by the guide member 17a in the middle thereof. The power transmitting portion is not limited to a timing belt, and a normal belt or the like may be used.

A bevel gear 18 is provided at an axially intermediate portion of the upper shaft 12 and rotates together with the upper shaft 12 about the same axis. A supporting shaft 20 for axially supporting the bevel gear 21 engaged with the bevel gear 18 is supported so as to be rotatable in the axial direction so as to be rotatable on the machine arm frame of the sewing machine, And the adjustment dial 22 fixed to the sewing machine arm is located outside the sewing machine arm portion. The needle bar upper and lower mechanism 13 converts the rotation operation of the upper shaft 12 about the axis into the vertical movement of the needle bar 14. [

The lower shaft 31 provided in the inside of the sewing machine bed portion is disposed such that its axis line is parallel to the axis of the upper shaft 12. [ At one end of the lower shaft 31, a pulley 33 on which the timing belt 17 is stretched is fixed coaxially.

At the other end of the lower shaft 31, a gear box 32 for converting the rotation of the lower shaft 31 into a swinging motion is provided. A gear shaft 34 is connected to the gear box 32 so that the shaft 34 is rotated as the lower shaft 31 rotates. The kiln shaft 34 is provided with a driver 35 which can be fixed in any rotation direction with respect to the kiln shaft 34, a kiln 36 which swings and rotates integrally with the driver 35, And a well-known kiln body constituted by a large kiln 37 accommodating therein is installed.

The gear box 32 also decelerates the rotational speed at which the kiln 36 is transmitted to the shaft 34 so that the kiln 36 makes one revolution while the top shaft 12 makes two revolutions.

A bevel gear 38 is provided on the same axis line at the end of the lower shaft 31 close to the gear box 32 and the kiln 36. A supporting shaft 42 supporting an upper end of the bevel gear 41 engaged with the bevel gear 38 is rotatable about an axis perpendicular to the lower shaft 31 and in the vertical direction, And is supported on the machine frame of the sewing machine bed portion so as to be able to move back and forth. And an adjusting dial (operating member) 40 is provided at the lower end of the supporting shaft 42. [ The support shaft 42 is normally received by a coil spring which does not show an elastic force with respect to a direction in which the bevel gear 41 is separated from the bevel gear 38, The bevel gear 41 is engaged with the bevel gear 38 by being pushed in the axial direction. The rotating operation of the adjusting dial 40 is converted into rotation of the lower shaft 31 by the bevel gear 41 and the bevel gear 38. [

As shown in Fig. 2, the adjustment dial 40 is exposed below the sewing machine bed portion B. As shown in Fig. Therefore, the worker can visually confirm the rotation of the kiln 36 from the lower side of the sewing machine bed portion B, and at the same time, the adjustment dial 40 can be operated with one hand.

Accordingly, the operator can perform the gauze fitting by operating the adjusting dial 40 while looking at the needle 15 and the kiln 36 from the bottom side of the sewing machine bed B.

According to such a sewing machine 1, when the sewing machine motor 11 is driven, the upper shaft 12 connected to the sewing machine motor 11 is rotated to move the needle bar 14 and the needle 15 up and down. The driving of the sewing machine motor 11 is transmitted to the lower shaft 31 by the timing belt 17 so that the kiln 36 rotates through the gear box 32. [

Next, the operation at the time of gauze alignment will be described.

Since the gimbal alignment is performed before starting the sewing machine 1, the driving of the sewing machine motor 11 is stopped, and the upper shaft 12 and the lower shaft 31 are also stopped.

In this state, the operator pushes the adjusting dial 40 from the lower side of the sewing machine bed portion B toward the lower shaft 31 to engage the bevel gear 41 with the bevel gear 38 of the lower shaft 31 do.

When the adjustment dial 40 is rotated by the operator so that the lower shaft 31 is rotated and the upper shaft 12 is rotated through the timing belt 17 so that the needle bar 14 and the needle 15 And is moved up and down. The operator performs adjustment of the gutter alignment by rotating the adjustment dial 40 so as to align the position of the tip of the needle 15 with the pointed end of the gutter 36. [

Here, when the gauze alignment is performed, all of them can be performed on the lower surface of the sewing machine bed portion B.

<Effect>

In this embodiment, since the gauze fitting can be performed by the operation of the adjustment dial 40 provided on the sewing machine bed portion, the operator can visually confirm the vertical position of the needle tip and the rotation position of the sharp end of the gauze 36 It can be easily performed in an unreasonable posture while confirming, and the worker can easily and efficiently work without burden.

In addition, even if the sewing machine table becomes large, the worker can perform the work while confirming with the same posture, and it is necessary to alternately repeat the positioning of the needle tip and the pointed end of the kiln and the confirmation of the position thereof alternately Therefore, it is possible to carry out the gauze alignment work surely and simply.

In addition, not only the adjustment by the adjustment dial 40 provided on the sewing machine bed but also the adjustment by the conventional adjustment dial 22 provided on the arm portion of the sewing machine is possible in the gauze fitting, .

<Modifications>

Further, in place of the above-described embodiment, the adjustment dial 40 may be disposed on the side of the sewing machine bed portion B in the present invention. That is, the support shaft 42 is arranged orthogonal to the lower shaft 31 in the horizontal direction, and the adjustment dial 40 is operably supported from the outer side of the sewing machine bed portion B at the tip thereof.

3, the adjustment dial 50 may be installed in parallel with the position of the needle 36 or the position at which it can be visually recognized at the same time as the needle 15 or the kiln 36. As shown in Fig.

Specifically, in the above embodiment, the gear box 32 provided at one end of the lower shaft 31 is moved to the other end side of the lower shaft, and one end of the lower shaft 31 is exposed from the gear box 32 to the outside.

At one end of the lower shaft 31, a groove 31a extending in the radial direction of the lower shaft 31 is formed. A projection 51a is formed at the other end of the shaft portion 51 to which the adjustment dial 50 is fixed at one end. The projection 51a is engaged with the groove 31a so as to engage / disengage.

When the adjustment dial 50 is rotated in a state in which the projection 51a is fitted in the groove 31a of the lower shaft 31, the lower shaft 31 is rotated in the same direction, So that the needle bar 14 and the needle 15 can be moved up and down.

With this configuration, the adjustment dial 50 is disposed in the direction of the operator side by side with the kiln 36.

Thereby, the operator can operate the adjustment dial 50 while checking the position of the tip of the needle 15 and the pointed end of the gutter 36, so that the guttering operation can be carried out more reliably and simply.

1 is a perspective view showing a driving mechanism and a control mechanism of a needle and a kiln of a sewing machine according to the present embodiment.

FIG. 2 is a perspective view showing a kiln and an adjustment dial viewed from the bottom side of the sewing machine bed according to the present embodiment.

Fig. 3 is a perspective view of a driving mechanism and adjusting mechanism of a needle and a kiln of a sewing machine showing another embodiment. Fig.

4 is a perspective view showing a driving mechanism and a control mechanism of a needle and a kiln of a sewing machine according to the related art.

Description of the Related Art [0002]

1, 2: sewing machine 11: sewing machine motor

12: Upper shaft 14: Needle bar

15: needle 17: timing belt (power transmitting portion)

31: lower shaft 36: kiln

42, 50: Control dial (operating member) B: Sewing machine bed part

Claims (5)

A top shaft rotatably provided on the arm portion of the sewing machine, A lower shaft rotatably installed on the sewing machine bed, A needle moving up and down in association with rotation of the upper shaft; A rotary shaft rotatable integrally with the lower shaft or rotatable relative to the lower shaft, And a power transmission portion that connects the upper shaft and the lower shaft to rotate the upper shaft and the lower shaft in synchronism with each other, The upper shaft is rotated to move the needle up and down so that the needle and the kiln can be adjusted to cross at a predetermined timing by rotating the upper shaft in a state in which the kiln is rotatable with respect to the lower shaft, An operating member capable of being manually operated is provided on the sewing machine bed portion, which is connected to the lower shaft, and rotates the lower shaft by a rotating operation, Wherein the operating member is connectable to a lower shaft by a support shaft, Wherein the support shaft is connectable to an end of a lower shaft adjacent to the kiln. The method according to claim 1, Wherein the support shaft is orthogonal to the lower shaft, Wherein the operating member is fixed to the support shaft so as to be positioned on the outer side of the sewing machine bed portion. delete The method according to claim 1, Wherein the support shaft is parallel to the lower shaft, Wherein the operating member is fixed to the support shaft so as to be positioned on the outer side of the sewing machine bed portion. 5. The method of claim 4, Wherein the operating member is arranged in parallel with the kiln in the same direction.

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