JPH0331270Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention can be used to sew a unique pattern of zigzag stitches, including a backward sewing advance section, and to automatically feed thread to a bobbin thread take-up reel. This article concerns an automatic zigzag sewing machine toy that has been devised so that it can be wrapped around it.

[Prior art] and [Problem to be solved by the invention] Japanese Patent Publication No. 54-5333, Publication No. 18359 of Utility Model No. 18359, Publication No. 20906 of Utility Model No. 53-20906, Publication No. 8209 of Utility Model No. 45-8209, and Publication of Japanese Utility Model Publication No. 1983 An expensive commercial sewing machine with high precision, many parts, and a complicated structure, such as the one shown in Publication No. 16143, is not suitable as a toy as it is. However, simply reducing the number of parts, simplifying the structure, and making it cheaper with acceptable accuracy is not enough, and there are many technical difficulties. In other words, changing the shape of the rice and its orientation requires a certain amount of improvement, requires ingenuity, and is often difficult.
It's not easy.

Despite this, it is also possible to create a zigzag stitch with a unique pattern that includes a backward sewing advance section.
There is a need for an inexpensive automatic zigzag sewing machine that can automatically wind thread around a bobbin thread take-up reel.

Therefore, the inventor of this application has made improvements and devises for the purpose of providing an automatic zigzag sewing machine toy.
We have now been able to meet the above demand.

[Means to solve the problem]

In order to achieve the above object, the automatic zigzag sewing machine toy of the present invention has a horizontal shaft 4 rotatably supported in a horizontal part 3 of a body 2 which stands upright on a bed 1. An externally operated manual rotation knob 6 is fixed to the rear end, a first bevel gear 7 and a worm gear 8 are fixed to the middle, and a first crank 9 is fixed to the tip in a non-rotatable manner. A second bevel gear 1 rotatably supports the vertical shaft 11 and meshes with the first bevel gear 7 at the upper end of the vertical shaft 11.
3 in the middle, and the spur gear 14 in the lower end.
The cranks 15 are each fixed in a non-rotatable manner, and a motor 16 for rotating the spur gear 14 is housed in the vertical part 10, and an oscillator 24 that slides in the left-right direction about a fulcrum 23 in the tip of the horizontal part 3 The needle bar 25 is supported through the first crank 9 in a state in which the needle bar 25 is repeatedly reciprocated up and down, and a fabric pressing member 27 is supported under the tip of the horizontal portion 3 via a vertical movement rod 26. At the same time as installing the vertical movement rod 26,
A first spring 2 that applies a pressing force to the upper surface of the throat plate 28 embedded in the top surface of the bed 1 against the presser member 27
9, and a second crank 15 in the bed 1.
The swinging rod 32 swings around the fulcrum 31 by
A fan-shaped gear 33 is integrally provided at the tip of the swinging rod 32, and a pinion 34 engages with the fan-shaped gear 33 on the underside of the location where the needle plate 28 is buried in the bed 1 to repeat forward and reverse rotation. A lower thread device 35 is provided for supplying the lower thread by means of a pair of elongated holes perpendicular to the horizontal axis 4 at locations corresponding to the top surface of the bed 1 and the lower surface of both sides of the presser member 27 on the throat plate 28. 36,
36' is opened, and a two-pronged jagged feeding member 37 for feeding the fabric enters from below into the elongated holes 36, 36', and a worm wheel 38 is placed above the horizontal shaft 4 in the horizontal portion 3. is engaged with the worm gear 8, and the center shaft 4 is mounted on the upper surface of the turntable 39.
0 and positioning pins 41, and separately from these, a cam portion 4 for controlling horizontal lateral vibration of a sewing machine needle 42 having a specific shape that issues a command for zigzag stitching.
3 and the rectangular movement control cam part 44 of the feed member 37 are stacked together to form a large number of cam bodies 45, and one of these cam bodies 45 is arbitrarily selected to control the turntable 39. A round shaft 48 and a square shaft 48' are placed on the top of the turntable 39 in a non-rotating state using a central shaft 40 and alignment pins 41, and a round shaft 48 and a square shaft 48' are placed next to the turntable 39 in the horizontal section 3.
A horizontal vibration follower 46, which swings while being guided by the cam surface of the lateral vibration control cam part 43, is rotatably supported on the round shaft 48, and the square shaft 48 The rectangular movement follower 47 that swings while being guided by the cam surface of the rectangular movement control cam section 44 is fixed non-rotatably at ', and the eccentricity between the swinging end of the lateral vibration follower 46 and the oscillating body 24 is fixed. A second spring 50 that presses the lateral vibration follower 46 against the lateral lateral vibration control cam part 43 is hung on the connecting rod 49, and a square shaft 48' is extended downward so that its lower end is connected to the rod 49. A third crank 52 is fixed to the entering end of the bed 1, and a swinging member 54 that swings in the horizontal direction about a fulcrum 53 is installed inside the bed 1, and one end of the swinging member 54 An oval pin hole 55 is formed in the pin hole 55, and the crank pin 56 of the third crank 52 is fitted into the pin hole 55, and an insertion piece 57 is connected to the other end of the oscillating member 54 to insert the crank pin 56 into the pin hole 55. Insert the piece 57 into the first ring 59 integrally provided on the lower surface of the forward/backward motion guide plate section 58 of the feed member 37, and insert the feed member 37 into the oscillating member 54. A third spring 60 that is moved rearward is hung through the plate portion 58, and a sliding rod 62 that is slid by an arm 61 fixed to a swinging rod 62 is housed in the bed 1. A guide wall 56 formed of a high part 63, an inclined part 64, and a low part 65 is formed on the upper surface near the tip, and these high part 63, inclined part 64, and low part 65 act as the first ring when the sliding rod 62 reciprocates. A rotating plate 72 of a small diameter is provided on the side wall 71 of the horizontal portion 3.
is freely rotatably supported via a horizontal short shaft 73,
A crown gear 74 is fixed to the inner end of the short shaft 73 so that a clutch gear 20 rotated by a rotation motor 16 can be freely engaged and disengaged from the crown gear 74, and a gear for winding the bobbin thread is attached to the outer surface of the rotary plate 72. A recess 77 into which the one side plate 76 of the reel 75 is fitted is provided, and a convex undercut 78 is provided on the opening edge of the recess 77 to prevent the one side plate 76 from falling off.

[Effect]

Since the present invention is as described above, when the rotation motor 16 is in a rotating state, the vertical shaft 11 and the horizontal shaft 4 rotate, and the rotational force of the vertical shaft 11 is transmitted to the second crank 15,
The bobbin thread device 35 is actuated via the swing rod 32, the sector gear 33, and the pinion 34, and the rotational force of the horizontal shaft 4 actuates the needle bar 25 via the first crank 9 and the like. Further, the rotational force of the horizontal shaft 4 rotates the turntable 39 and the cam body 45 via the worm gear 8, the worm wheel 38, and the central shaft 40. The lateral oscillation control cam portion 43 in the cam body 45 causes the needle bar 25 to oscillate via the lateral oscillation follower 46, the connecting rod 49, and the oscillating body 24. In addition, the rectangular movement control cam portion 44 in the cam body 45 includes the square shaft 48', the third crank 52, the oscillating member 54, the first
The feed member 37 is moved back and forth via the ring 59 and the back and forth movement guide plate portion 58. During this back and forth movement, the sliding rod 62 reciprocates due to the swinging of the arm 61 fixed to the swinging rod 32, and the guide wall 66
The high portion 63, the inclined portion 64, and the low portion 65 move the feeding member 39 up and down via the first ring 59.

That is, the automatic zigzag sewing machine according to the present invention is configured to automatically control the horizontal oscillation of the needle bar to which the sewing machine needle is attached and the feed control of the feed member by the action of the cam device. It is also possible to perform zigzag stitching with a unique pattern including a so-called backward position (for example, the area indicated by a white arrow) with respect to the direction of movement of the fabric shown by the bold line arrow in FIG.

Furthermore, when the reel 75 on which the bobbin thread is wound is required during the sewing work, one side plate 76 of the empty bobbin thread winding reel is pushed into the recess 77 and the reel is attached to the rotary plate 72. After attachment, the end of the thread of the upper thread bobbin previously loaded on the spool pin is wound around the reel 5 to 6 times, and in this state, the reel is rotated by the motor 16 via the clutch gear 20. It can be obtained by transferring the thread of the bobbin top to the reel 75 and winding it, and when the appropriate amount of winding is completed, cutting off the thread from the bobbin top, and then pulling out the reel 75 from the rotary plate 72.

[Effect of idea]

Since the present invention has the above-described configuration, it is possible to provide an inexpensive automatic zigzag sewing machine toy with fewer parts, a simplified structure, and fair accuracy. Moreover, when the reel 75 on which the bobbin thread is wound is required during sewing work, it is not only convenient to be able to easily obtain it as described above, but also the rotary plate 7 of the reel 75
There is an advantage that attaching and detaching the reel to and from the reel can be done extremely simply and easily by pushing or pulling out one side plate of the reel into the recess with your fingers.
In addition, since the top surface of the peripheral wall of the recess forms a brim around one side plate of the reel, it is difficult for the thread to come off or get tangled during winding.Furthermore, since the reel does not require a shaft hole, etc. The structure can be easily produced by synthetic resin molding, and costs can be reduced.

〔Example〕

In the embodiment shown in the figure, a hollow body 2 having a shape is erected on a bed 1, and a horizontal shaft 4 is rotatably mounted in a horizontal portion 3 of the body 2 via bearing members 5, 5'. An externally operated manual rotation knob 6 is fixed to the rear end of the horizontal shaft 4, a first bevel gear 7 and a worm gear 8 are fixed to the middle thereof, and a first crank 9 is fixed to the tip of the horizontal shaft 4 in a non-rotatable manner. A vertical shaft 11 is rotatably supported in a vertical portion 10 via bearing members 12 and 12', and a second bevel gear 13 that meshes with the first bevel gear 7 is mounted on the upper end of the vertical shaft 11, also in the middle. Spur gear 1
Similarly, a second crank 15 is fixed to the lower end of the body 2 so as not to rotate, and a motor 16 that is rotated by a dry battery (not shown) built in the bed 1 is installed in the vertical part 10 of the body 2. 16 is transmitted to the above-mentioned spur gear 14 through transmission gears 17, 18, 19 and a clutch gear 20 (switching device for engaging or disengaging state is omitted). A box-shaped support member 22 is fixed in the tip part, and an oscillating body 24 that slides in the left-right direction about a fulcrum 23 is housed within the box-shaped support member 22, and the sewing machine needle 42 is attached to and detached from the oscillator 24. The needle bar 25 is supported so as to be movable up and down, and the needle bar 25 is repeatedly moved up and down by the first crank 9, and is equipped with a vertically movable rod 26 at the tip of the horizontal section 3. A presser member 27 made of fabric (not shown) having a bifurcated shape is attached to the lower end of the vertically moving rod 26 so as to be able to swing vertically with a shaft pin 27', and the presser member 27 Throat plate 2 embedded in the top of bed 1
The bed 1 is equipped with a first spring 29 that applies a pressing force to the upper surface of the bed 1, a lifting lever 30 that maintains the presser member 27 and the vertical movement rod 26 in the raised and lowered states, and is provided with a fulcrum within the bed 1 by the second crank 15. 3
A swinging rod 32 that swings around 1 is provided, and a fan-shaped gear 33 is integrally provided at the tip of this swinging rod 32.
In addition, a lower thread device 35 is provided on the lower surface of the part where the needle plate 28 is embedded in the bed 1, and supplies the lower thread by the operation of a pinion 34 that meshes with a fan-shaped gear 33 and repeats forward and reverse rotation. A pair of elongated holes 36, 3 perpendicular to the horizontal axis 4 are located on the top surface and throat plate 28 at locations corresponding to the lower surfaces of both side legs of the presser member 27.
6' is opened, and a bifurcated jagged feeding member 37 for feeding the fabric enters from below into the elongated holes 36, 36'.
36' and above the holes 36, 36', a guide wall 66, which will be described later, allows the swinging members 54 to be moved upwardly and downwardly.
A turntable 39 having a worm wheel 38 as a support shaft is installed above the horizontal shaft 4 in the horizontal portion 3, and the worm wheel 38 is meshed with the worm gear 8. A center shaft 40 and a positioning pin 41 are protruded from the upper surface of the turntable 39, and a cam portion 43 for controlling horizontal lateral vibration of a sewing machine needle 42 has a specific shape that issues a command for zigzag stitching separately from these. A cam body 4 having an integrated shape in which a rectangular movement control cam portion 44 of a feeding member 37 is stacked.
5 are constructed of many types (only one type is shown in the figure), and one of these cam bodies 45 is mounted on the turntable 39 using the center shaft 40 and alignment pin 41 to prevent it from rotating as appropriate. At the same time, a support shaft composed of a round shaft 48 and a square shaft 48' is vertically installed near the side of the turntable 39 in the horizontal part 3,
The round shaft 48 rotatably supports a lateral vibration follower 46 that swings while being guided by the cam surface of the cam part 43 for controlling left and right lateral vibration, and the cam of the cam part 44 for rectangular movement control is supported on the square shaft 48'. A rectangular movement follower 47 that swings while being guided by a surface is fixed non-rotatably, and a transverse vibration follower 4
6 and the eccentric portion of the oscillating body 24 are connected by a connecting rod 49, and the lateral vibration follower 46 is brought into pressure contact with the horizontal lateral vibration control cam part 43 by the connecting rod 49. The spring 50 is hung, and the square shaft 48' is extended downward so that its lower end enters into the bed 1. A third crank 52 is fixed to this entry end, and a fulcrum 53 is attached inside the bed 1. A swinging member 54 is provided which swings in the horizontal direction with the swinging member 54 as the center, and an oval pin hole 55 is formed at one end of the swinging member 54, and a crank pin 56 of the third crank 52 is fitted into the pin hole 55. A first ring is provided with an insertion piece 57 connected to the other end of the oscillating member 54, and the insertion piece 57 is integrally provided on the lower surface of the longitudinal movement guide plate portion 58 of the feeding member 37. 5
9, a third spring 60 for moving the feed member 37 backward through the insertion piece 57, the first ring 59, and the guide plate portion 58 is hung on the swinging member 54, and further inserted into the bed 1. A sliding rod 62 that is slid by an arm 61 fixed to the swinging rod 32 is provided, and a guide formed by a high portion 63, an inclined portion 64, and a low portion 65 on the top surface of the sliding rod 62 near the tip. A wall 56 is provided, and these high portions 63 and sloped portions 6
4. The lower part 65 is the first when the sliding rod 62 moves back and forth.
The lower edge surface of the ring 59 is in sliding contact to control the vertical movement of the feed member 37, and a small-diameter rotary plate 72 is rotatably supported on the side wall 71 of the horizontal portion 3 via a horizontal short shaft 73. A crown gear 74 is fixed to the inner end of the short shaft 73 so that the clutch gear 20 can be freely engaged and disengaged from the crown gear 74, and a bobbin thread take-up reel 75 is attached to the outer surface of the rotary plate 72. A recess 77 into which the one side plate 76 is fitted is provided, and a convex undercut 78 is provided on the opening edge of the recess 77 to prevent the one side plate 76 from falling off.

In addition, 81 in the figure is an arm for taking up the slack of the upper thread;
2 is a switch for forward/reverse rotation of the motor 16, that is, engagement/disengagement of the clutch gear 20; 83 is a third switch;
84 is an outer housing, 85 is a replacement port for the cam body 45, 86 is a removable transparent lid of the replacement port 85, 87 is an upper thread guide, and 88 is a bobbin thread hook.

[Brief explanation of the drawing]

The figures show an embodiment of the automatic zigzag sewing machine according to the present invention, in which Fig. 1 is a partially cutaway front view showing the whole, Fig. 2 is a partially cutaway front view, and Fig. 3 is the same. Partially cut left side view, Fig. 4 is a right side view, Fig. 5 is a partially cutaway top view, Fig. 6 is a partially cutaway bottom view, and Fig. 7 is an enlarged explanatory view of the sewing pattern. It is. 1...Bed, 2...Body, 3...Horizontal part,
4... Horizontal shaft, 5, 5'... Bearing member, 6... Manual rotation knob, 7... First bevel gear, 8... Worm gear, 9... First crank, 10... Vertical part, 11... Vertical shaft, 12, 12'... shaft bearing member,
13...Second bevel gear, 14...Spur gear, 15
...Second crank, 16...Motor, 17,1
8, 19...transmission gear, 20...clutch gear,
22... Supporting member, 23... Fulcrum, 24... Rocking body, 42... Sewing machine needle, 25... Needle bar, 26...
Vertical rod, 27...pressing member, 27'...shaft pin,
28... Throat plate, 29... First spring, 30... Lifting lever, 31... Fulcrum, 32... Rocking rod, 33...
... Sector gear, 34 ... Pinion, 35 ... Lower thread device, 36, 36' ... Long hole, 37 ... Feeding member,
38... Worm wheel, 39... Turntable, 40... Center shaft, 41... Positioning pin,
43... Cam part for left and right lateral vibration control, 44... Cam part for rectangular movement control, 45... Cam body, 46... Follower for lateral vibration, 47... Follower for rectangular movement, 48...
Stop shaft, 49...Running rod, 50...Second spring, 48'
... Square shaft, 52 ... Third crank, 53 ... Fulcrum, 54 ... Oscillating member, 55 ... Pin hole, 56 ...
... Crank pin, 57 ... Insertion piece, 58 ... Longitudinal movement guide plate section, 59 ... First ring, 60 ... Third
Spring, 61...Arm, 62...Sliding rod, 63...
...High part, 64...Slope part, 65...Low part, 6
6... Guide wall, 67... Second ring, 71... Side wall, 72... Rotating plate, 73... Short shaft, 74... Crown gear, 75... Reel, 76... One side plate, 7
7... recess, 78... undercut, 81...
Slack removing arm, 82...switch switch,
83...Third ring, 84...Outer casing, 85...Exchange port, 86...Transparent lid, 87...Needle thread guide, 8
8...Bobbin thread hook.

Claims (1)

[Scope of utility model registration request] A horizontal shaft 4 is rotatably supported in a horizontal portion 3 of a body 2 that stands upright above the bed 1, and an externally operated manual rotation knob 6 is provided at the rear end of the horizontal shaft 4, and a manual rotation knob 6 is provided at the rear end of the horizontal shaft 4. A first bevel gear 7 and a worm gear 8 are each fixed with a first crank 9 non-rotatably at their tips, and a vertical shaft 11 is rotatably supported in a vertical portion 10 of the body 2. Second bevel gear 1 meshing with first bevel gear 7
3 in the middle, and the spur gear 14 in the lower end.
The cranks 15 are each fixed in a non-rotatable manner, and a motor 16 for rotating the spur gear 14 is housed in the vertical part 10, and an oscillator 24 that slides in the left-right direction about a fulcrum 23 in the tip of the horizontal part 3 The needle bar 25 is supported through the first crank 9 in a state in which the needle bar 25 is repeatedly reciprocated up and down, and a fabric pressing member 27 is supported under the tip of the horizontal portion 3 via a vertical movement rod 26. At the same time as installing the vertical movement rod 26,
A first spring 2 that applies a pressing force to the upper surface of the throat plate 28 embedded in the top surface of the bed 1 against the presser member 27
9, and a second crank 15 in the bed 1.
The swinging rod 32 swings around the fulcrum 31 by
A fan-shaped gear 33 is integrally provided at the tip of the swinging rod 32, and a pinion 34 engages with the fan-shaped gear 33 on the underside of the location where the needle plate 28 is buried in the bed 1 to repeat forward and reverse rotation. A lower thread device 35 is provided for supplying the lower thread by means of a pair of elongated holes perpendicular to the horizontal axis 4 at locations corresponding to the top surface of the bed 1 and the lower surface of both sides of the presser member 27 on the throat plate 28. 36,
36' is opened, and a two-pronged jagged feeding member 37 for feeding the fabric enters from below into the elongated holes 36, 36', and a worm wheel 38 is placed above the horizontal shaft 4 in the horizontal portion 3. is engaged with the worm gear 8, and the center shaft 4 is mounted on the upper surface of the turntable 39.
0 and positioning pins 41, and separately from these, a cam portion 4 for controlling horizontal lateral vibration of a sewing machine needle 42 having a specific shape that issues a command for zigzag stitching.
3 and the rectangular movement control cam part 44 of the feed member 37 are stacked together to form a large number of cam bodies 45, and one of these cam bodies 45 is arbitrarily selected to control the turntable 39. A round shaft 48 and a square shaft 48' are placed on the top of the turntable 39 in a non-rotating state using a central shaft 40 and alignment pins 41, and a round shaft 48 and a square shaft 48' are placed next to the turntable 39 in the horizontal section 3.
A horizontal vibration follower 46, which swings while being guided by the cam surface of the lateral vibration control cam part 43, is rotatably supported on the round shaft 48, and the square shaft 48 The rectangular movement follower 47 that swings while being guided by the cam surface of the rectangular movement control cam section 44 is fixed non-rotatably at ', and the eccentricity between the swinging end of the lateral vibration follower 46 and the oscillating body 24 is fixed. A second spring 50 that presses the lateral vibration follower 46 against the lateral lateral vibration control cam part 43 is hung on the connecting rod 49, and a square shaft 48' is extended downward so that its lower end is connected to the rod 49. A third crank 52 is fixed to the entering end of the bed 1, and a swinging member 54 that swings in the horizontal direction about a fulcrum 53 is installed inside the bed 1, and one end of the swinging member 54 An oval pin hole 55 is formed in the pin hole 55, and the crank pin 56 of the third crank 52 is fitted into the pin hole 55, and an insertion piece 57 is connected to the other end of the oscillating member 54 to insert the crank pin 56 into the pin hole 55. Insert the piece 57 into the first ring 59 integrally provided on the lower surface of the forward/backward motion guide plate section 58 of the feed member 37, and insert the feed member 37 into the oscillating member 54. A third spring 60 that is moved rearward is hung through the plate portion 58, and a sliding rod 62 that is slid by an arm 61 fixed to a swinging rod 62 is housed in the bed 1. A guide wall 56 formed of a high part 63, an inclined part 64, and a low part 65 is formed on the upper surface of the part near the tip, and these high part 63, inclined part 64, and low part 65 act as the first ring when the sliding rod 62 reciprocates. A rotating plate 72 of a small diameter is provided on the side wall 71 of the horizontal portion 3 so that the lower edge surface of the feeding member 59 is in sliding contact to control the vertical movement of the feeding member 37.
is rotatably supported via a horizontal short shaft 73,
A crown gear 74 is fixed to the inner end of the short shaft 73 so that a clutch gear 20 rotated by a rotation motor 16 can be freely engaged and disengaged from the crown gear 74, and a gear for winding the bobbin thread is attached to the outer surface of the rotary plate 72. The automatic zigzag is characterized in that a recess 77 into which the one side plate 76 of the reel 75 is fitted is provided, and a convex undercut 78 is provided on the opening edge of the recess 77 to prevent the one side plate 76 from falling off. Sewing machine toys.