JP2521964Y2 - Side feed mechanism of sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention relates to a sewing machine capable of vertical and horizontal feed of a sewing machine, and more particularly to a novel horizontal feed drive transmission mechanism that is not affected by a vertical feed drive transmission mechanism.

(Problems to be Solved by the Related Art and the Invention) A conventional sewing machine in which the feed dog is driven in both the vertical and horizontal directions by driving the feed dog in the horizontal direction in the longitudinal feed due to the forward and backward movement of the feed dog of the sewing machine. Another known application is Japanese Utility Model Application No. 60-88838, which was previously filed by the present applicant.

In these methods, a part of the transmission mechanism that drives the feed table that holds the feed dogs in the vertical direction is laterally fed, and this places a heavy burden on the horizontal feed mechanism.

Further, in the case where the feed base is fed horizontally, the feed base that moves in the vertical feed direction is fed horizontally, so that the feed in the horizontal feed direction is affected. When the vertical feed and the horizontal feed are performed simultaneously, the transmitting portions are affected by each other, and the horizontal feed is performed while being affected by the vertical feed.

In order to prevent the occurrence of the twisting, it is necessary to operate the vertical feed and the horizontal feed at different timings in the sewing machine having the above configuration. In the case of adjusting the vertical movement of the needle, it is necessary to separate the needle from the vertical driving means during the lateral feed.

For this reason, in the present invention, in the sewing machine which feeds the cloth by adjusting the vertical feed and the horizontal feed in the diagonal direction at the same time as the vertical movement of the needle, the horizontal feed to prevent the twisting caused by the effect of the vertical feed movement. The purpose is to propose a motion transmission mechanism.

(Means for Solving the Problems) For this reason, in the present invention, a stitch forming means including a needle which reciprocates up and down and oscillates in a lateral direction, a needle thread supplementing means cooperating with the needle, and a fabric feedable. Vertical feed means for driving a feed table for fixing a suitable feed dog in vertical reciprocating movement of the needle and driving the feed table in a vertical feed direction orthogonal to the swinging direction of the needle; A transverse feed means for driving the table in a transverse feed direction orthogonal to the longitudinal feed direction,
The transverse feed means slides in the axial direction of a feed shaft to move a rod for transversely moving the feed base with respect to the feed axis to a center of oscillation of a feed shaft of the vertical feed means for transmitting the longitudinal feed by a swinging motion. With this arrangement, the rocking motion transmitting portion of the feed shaft for vertical feeding and the sliding motion transmitting portion of the rod for lateral feeding drive the feed table without interfering with each other.

Embodiment Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is an external view of the sewing machine of the present invention, which will be described with reference to the mechanism explanatory views of FIGS. 1 and 3. FIG. The vertical reciprocating movement of the needle and the longitudinal feed of the feed in this embodiment, that is, the conventional longitudinal movement, the movement of the shuttle of the needle thread supplementing means, etc. Therefore, the detailed description is omitted.

In FIG. 2, reference numeral 4 denotes a pattern selecting means, on which a pattern selection display and a pattern number are displayed, and which selects a desired pattern by operating the numeric keys 5 of 0-9.
The selected number is displayed on the pattern display means 6. The pattern display may be one that displays the pattern itself using an LCD or the like.

A drive shaft 2 that is connected to a drive source (not shown) and transmits rotation is rotatably supported on the sewing machine frame 1, and a needle bar 3 connected to the drive shaft is attached to the sewing machine frame 1. It is supported so that it can move up and down. A needle 17 is fixed to the tip of the needle bar 3.

A needle bar crank 8 is fixed to one end of a crank 7 provided at the shaft end of the drive shaft 2, and one end of a crank rod 9 is rotatably fitted to a shaft portion of the needle bar crank.

The other end of the crank rod is rotatably fitted to a shaft of a needle bar holder 10 through which the needle bar 3 is inserted. The needle bar 3 is provided above and below the needle bar holder 10 with a needle bar support. 11 is inserted vertically movably.

The needle bar support is fitted on a shaft 12 fixed to the sewing machine frame 1, and is supported so as to be movable only in the rotation direction while being restricted from moving up and down.

One end of a connecting rod 13 is connected to a side of the needle bar support 11 opposite to the needle bar 3, and the other end of the connecting rod is connected to the needle bar amplitude stepping motor fixed to the sewing machine frame 1.
The output shaft 14a is connected to a fixed arm 15 and a link 16 via a link 16.

The needle bar 3 is provided on the sewing machine frame 1 below the needle bar 3.
A needle plate 18 having a needle hole 18a through which a fixed needle 17 is inserted is fixed to the distal end of the needle plate 18.

Reference numeral 19 denotes a feed dog, which is a feed dog groove 18 provided in the needle plate 18.
The cloth which appears and disappears from b and cooperates with the cloth presser 20 to move the cloth in synchronization with the vertical movement of the needle 17 is moved.

The feed dog 19 is fixed to a feed base 21 connected to a horizontal feed swing member 32 driven by the drive shaft 2, and the adjustment of the momentum of the feed base 21 adjusts the swing amount of the feed shaft 32. It is done by doing.

Reference numeral 22 denotes a feed adjuster, which is fixed to a shaft end of a feed adjustment shaft 23 rotatably supported on the sewing machine frame 1,
By rotating the feed adjusting shaft, the feed adjuster 22 is rotated.
The feed rate is adjusted by changing the angle of.

That is, the transmission amount of the forward and backward movement generated by the horizontal feed cam 45 which is an eccentric cam fixed to the lower shaft 29 which is connected to the drive shaft 2 and rotatably supported on the sewing machine frame 1 is adjusted. Things.

An arm 24 is fixed to the other end of the feed adjusting shaft 23,
The arm and the fixed arm 26 are connected via a link 27 to the output shaft of the fixed feed adjusting stepping motor 25 of the sewing machine frame 1.

Reference numeral 28 denotes a shuttle as a needle thread supplementing means, which is rotatably supported by the sewing machine frame 1 below the needle plate 18 and connected to the drive shaft 2 to synchronize with the vertical movement of the needle 17. A gear 30 fixed to the rotating lower shaft 29 and a gear 31 of the shuttle integrally fixed to the lower part of the shuttle 28 are engaged to transmit rotation.

Numeral 79 denotes a drive shaft phase detecting means, which comprises a rotary plate 80 fixed to the drive shaft 2 and a photo interrupter 81 fixed to the sewing machine frame 1. The phase detection by the drive shaft phase detection means 79 is the same as that described in Japanese Patent Application Laid-Open No. 55-73288 filed earlier by the present applicant, and the description thereof is omitted.

The vertical and horizontal feed mechanisms of the feed dog 19 will be described with reference to FIGS. 1 and 4 to 7. FIG.

The horizontal feed swing member 32 is rotatably supported by a pair of tapered screws 33 and 34 screwed to the sewing machine frame 1 at its shaft portion, and the horizontal feed swing member is moved from its shaft portion. Arms 32a and 32b which stand upright at both ends are formed.
Pins 39 and 40 are fixed to the tip of the arm in parallel with the horizontal feed rocking member 32 by screws 37 and 38.

In particular, as shown in FIG. 5, a predetermined distance L1 between the arms 32a, 32b of the horizontal feed rocking member 32 and both ends of the horizontal feed base 21 is rotatable about the pins 39, 40. , L2 only pin 3
Fits movably in 9,40 axial directions. The slide 21
The lower portion 21a is disposed on an upper and lower feed cam 41 which is an eccentric cam fixed to the lower shaft 29, and is always brought into contact with the upper and lower feed cam by a spring means (not shown) to be moved up and down. .

A pin 43 is fixed to an intermediate portion between the swing center of the horizontal feed swing shaft 32 and the tip of the arm, and one end of a feed fork 44 is rotatably fitted to the pin.

The bifurcated portion of the feed bifurcation is fitted on the outer periphery of a feed cam 45 which is an eccentric cam fixed to the lower shaft 29, and a pin 46 is fixed to one of the bifurcated portions. Square sesame on the pin
47 is fitted, and the square rubber is fitted in the adjusting groove 22a of the feed adjuster 22.

The horizontal feed swinging member 32 swings the shaft portion about the pair of tapered screws 33 and 34 in accordance with the inclination of the feed adjuster 22 to move the feed base 21 forward and backward. Let it.

 Next, the lateral feed mechanism will be described.

The horizontal feed rocking member 32 has through-holes 32c and 33a formed at the center of the pivot of the shaft portion and the center of the tapered screw 33, respectively, and the rod 35 is inserted through the through-hole so as to be movable in the axial direction. ing. A connecting member 42 is fixed to one end of the rod, and an engaging groove 42a is formed above the connecting member.

A pin 21a is integrally formed below the feed base 21, and the pin is fitted in the engaging groove 42a of the connecting body 42.

A rod piece 49 forming a fitting hole 49a is fixed to the other end of the rod 35.

Reference numeral 50 denotes a transverse feed rod, which is rotatably fitted to a shaft 51 fixed to the sewing machine frame 1;
One end of a connecting rod 53 is rotatably fitted to a pin 52 integrally fixed to a central portion of the rod.

A pin 54 is fixed to the other end of the connecting rod, and the pin is rotatably fitted in a fitting hole 49a of the rod piece 49.

55 is a lower shaft gear, which is fitted and fixed to the lower shaft 29, and is rotatably supported by the sewing machine frame 1.
It meshes with a transverse feed gear 57 fixed to 56.

A traverse cam 58 is fixed to the gear shaft 56, and a fork 59a of the traverse fork 59 is fitted to a cam portion of the traverse cam.

A fork pin 60 is fixed to one end of the lateral feed fork 59, and the fork pin is rotatably fitted in a fitting hole formed at the tip of the lateral feed rod 50.

A pin 61 is fixed to one end of a bifurcated portion 59a of the lateral feed bifurcated 59.

A transverse feed adjusting shaft 62 is rotatably supported by the sewing machine frame 1, and a transverse feed adjuster 63 is fixed to an end of the transverse feed adjusting shaft. An adjustment groove 63a is formed in the traverse adjuster, and a traverse angle sesame 64 is slidably fitted in the adjustment groove.

A fitting hole is formed in the lateral feed angle rubber, and a pin 61 fixed to the fork part 59a of the lateral feed fork 59 is rotatably fitted in the fitting hole.

An adjusting arm 65 is fixed to the lateral feed adjusting shaft 62, and a pin 66 is fixed to a tip of the adjusting arm. One end of an adjustment rod 67 is rotatably fitted to the pin, and the other end of the adjustment rod is fixed to an output shaft 68a of a transverse feed adjustment stepping motor 68 fixed to the sewing machine frame 1. And is rotatably fitted to a pin 70 formed integrally therewith.

 Next, the operation of the feeder of the present invention will be described.

 The rotation of the drive shaft 2 causes the lower shaft 29 to rotate.

As for the vertical feed, the horizontal feed rocking member 32 rocks around the tapered screws 33 and 34 according to the adjustment position of the feed adjuster 22 by the rotation of the feed cam 45 fixed to the lower shaft, and the arm The feed table 21 is moved back and forth through pins 39 and 40 fixed to the ends of the portions 32a and 32b, and the feed dog 19 is fed vertically.

The amount of vertical feed of the feed dog is achieved by driving the stepping motor 25 for feed adjustment and rotating the feed adjuster 22 to set the inclination of the adjustment groove.

For lateral feed, the lower shaft gear fixed to the lower shaft 29
55 and the traverse gear 57 mesh with each other to rotate the gear shaft 56. By the rotation of the traverse cam 58 fixed to the gear shaft, the traverse angle rubber 64 into which the fixing pin 61 is fitted to the fork portion 59a of the traverse fork 59 moves the adjusting groove 63a of the traverse adjuster 63. Slide.

The inclination of the adjustment groove 63a of the traverse adjuster 63 is controlled by the traverse adjustment stepping motor 68, and the feed fork 53 operates by being guided by the traverse cam 58 and the adjustment groove 57. The feed rod 50 into which the bifurcated pin is fitted swings about the shaft 51.

The rod 35 is axially moved via the rod piece 49 to which the other end of the connecting rod 53 fitted to the pin 52 fixed to the center of the feed rod is connected, and the fixed connecting body 42 is attached to the tip of the rod. Move in the axial direction.

Since the hanging pin 21a of the feed base 21 is fitted in the engagement groove 42a of the connecting body, the feed base slides in the axial direction of the pins 39 and 40, and in particular, as shown in FIG. Interval L1 + L2
Only the horizontal feed swing member 32 moves in the horizontal direction orthogonal to the vertical feed by swinging, and the feed dog 19 is fed horizontally.

The traverse amount is determined by the traverse adjustment stepping motor.
Drive 68 to rotate the traverse adjuster 63 to adjust the adjustment groove 63a.
This is done by setting the inclination of.

Accordingly, the rotation of the drive shaft 2 causes the needle bar 3 to move up and down, and the horizontal feed shaft 32 swings by the rotation of the lower shaft 29 in synchronization with the vertical movement of the needle bar, thereby causing the feed dog 19 to move. Vertical feed,
The rod 35 moves in the axial direction to feed the feed dog 19 sideways.

Since the rod 35 is disposed at the axial center of the swinging horizontal feed swing member 32, the rod 35 transmits the transverse feed without being affected by the transverse feed.

Next, a second embodiment of the present invention will be described with reference to FIG.

This embodiment is different from the above-described first embodiment only in the lateral feed generating mechanism, and the other components are the same. Therefore, the description of the other components will be omitted.

Vertical feed mechanism rod 135, rod top 149, horizontal feed rod
150, connecting rod 153, lateral feed adjuster 163, adjusting rod 167, arm
169, for the stepping motor 168 for lateral feed adjustment,
This is the same as the first embodiment.

158 is a lateral feed cam, which is fitted and fixed to the lower shaft 129, the outer periphery is formed as an eccentric cam eccentric to the lower shaft 129, and a ball 171 is provided at one end on the outer periphery. One end of a transverse feed rod 172 which is integrally held rotatably is fitted.

Reference numeral 173 denotes a lateral feed operating rod, which has a pin 160 fixed to one end thereof, and the pin is rotatably inserted into a fitting hole at the tip of the lateral feed rod 150.

A pin 161 is fixed to the other end of the traverse operation rod 173, and the pin 161 is slidably fitted in an adjustment groove 163a formed in the traverse adjuster 163.
Is rotatably inserted into the fitting hole. A rising portion 173a is formed in the middle of the lateral feed operation rod 173, and a shaft 174 is fixed to the rising portion as shown in FIG.

The small diameter portion of the shaft is inserted into the fitting hole of the ball 171 and the shaft 1
A nut 175 screwed into a screw provided at the shaft end of 74 and the shaft 174
The ball 171 is integrally fixed to the step portion of the small diameter portion, and a ball joint is formed between the lateral feed transmission rod 172 and the shaft 174.

Next, the operation will be described. By the rotation of the lower shaft 129, the traverse transmission rod 172 drives the traverse operation rod 173 by the ball joint, and by the operation of the traverse operation rod, the square sesame 164 is moved by the traverse adjuster 163. Slide the adjustment groove.

The traverse rod 150, to which the other end of the operating rod 173 is connected, swings about a shaft 151 in accordance with the inclination of the adjustment groove of the traverse adjuster, and slides the rod 135 in the axial direction. The feed bar 21 is operated in the lateral direction to feed the feed dog 19 in the lateral direction.

(Effects of the Invention) As described above, according to the present invention, since only the feed base on which the feed dog is mounted is traversed, a large load is prevented from being applied to the traverse drive mechanism, and the driving force can be reduced. In addition, by arranging the transverse feed driving means at the swing center of the vertical drive means without causing interference with the drive means, the horizontal feed drive can be performed without being affected by the conventional vertical drive means. Because of the traversing drive means to be performed, it is possible to provide a compact vertical and horizontal traversing mechanism that prevents the occurrence of prying due to movement in both directions.

[Brief description of the drawings]

1 is an explanatory view of a feed mechanism, FIG. 2 is an external view of a sewing machine, FIG. 3 is an explanatory view of a mechanism of the sewing machine, FIG. 4 is a plan view of a feed mechanism, FIG. 5 is a front view of the feed mechanism, FIG. 6 is a sectional view taken along the line AA in FIG. 4, FIG. 7 is a sectional view taken along the line BB in FIG. 5, and FIG. 9 is an explanatory view of a feed mechanism in another embodiment, FIG. 10 is an explanatory view of a ball joint portion, 17 is a needle, 28 is a hook which is a needle thread supplementary means, 19 is a feed dog, Reference numeral 21 denotes a feed table, 32 denotes a horizontal feed swing member, and 35 denotes a rod.

Claims (2)

(57) [Scope of request for utility model registration] A needle capable of reciprocating up and down in conjunction with rotation of a drive shaft of the sewing machine and capable of oscillating in a lateral direction; a needle thread catching device cooperating with the needle to form a stitch; A feed base for supporting teeth, and a horizontal support supported by the sewing machine frame at the upper end so as to be rotatable vertically and movably in the horizontal direction at the upper end, and to be swingable in the front-rear direction at the lower end. A feed rocking member, a means for vertically rocking the feed table on the horizontal feed rocking member in synchronization with the rotation of the sewing machine drive shaft, and Means for pivoting the horizontal feed rocking member in a vertical direction perpendicular to the horizontal rocking motion path of the needle; and connecting to the rocking member and displacing it angularly to move the vertical feed rocking member vertically. A vertical feed adjuster for adjusting the amount of swing in the direction, and a vertical feed adjustment mode for setting the angular position of the vertical feed adjuster. When a cam that rotates in conjunction with the sewing machine drive shaft, and a bifurcated member which swings in engagement with the said cam,
At one end, the swinging fulcrum of the bifurcated member is carried, and at the other end, the bifurcated member is rotatably fitted to the sewing machine frame and swings in association with the swinging motion of the bifurcated member. A traversing rod that converts the swinging motion of the member into a linear motion, and a traversing motion of the traversing rod connected to the traversing rod at one end and to the traversing bar at the other end. A motion transmitting rod for transmitting and moving the feed table on the horizontal feed rocking member in a lateral direction perpendicular to the vertical rocking motion path thereof; and a motion transmitting rod connected to the bifurcated member and angularly displaced. A traverse adjuster for adjusting the amount of movement of the movement transmission rod by changing the oscillating angle position of the bifurcated member and thereby changing the amount of oscillating of the traverse rod; and the oscillating angle of the traverse adjuster. And a traverse adjustment motor for setting a position. Structure. 2. The lateral feed of a sewing machine according to claim 1, wherein said transmission rod is disposed concentrically with a swing shaft portion of said horizontal feed swing member. mechanism.