TWI577848B - Sewing machine on the upper and lower drive mechanism - Google Patents

Description

Upper and lower drive mechanism of the feeding table above the sewing machine

The present invention relates to a sewing machine feed mechanism, and more particularly to an upper and lower drive mechanism for mounting a feed table above the upper feed.

In the present invention, the front and rear refers to the front and rear directions of the cloth feeding direction, and the left and right refers to the left and right direction when the sewing machine is viewed from the front. In addition, the upper and lower sides refer to the upper and lower directions of the sewing machine.

There is a sewing machine (see Patent Document 1) which is provided with an upper and lower drive mechanism for moving the upper feed table up and down. Fig. 8 is a perspective view showing the upper and lower drive mechanisms of the upper feed table of the conventional sewing machine. As shown in Fig. 8, according to the prior art, a clutch mechanism 92 is provided at one end of the upper and lower shafts 91, and a crank 93 is fixed to the other end of the upper and lower shafts 91, and the guide 95 is rotatably coupled to The crank 93. The guide 95 is provided with a guide groove 95a, and the upper feed table 94 is slidably fitted in the guide groove 95a. According to the above configuration, the vertical drive mechanism rotates the upper and lower shafts 91 and the crank 93 integrally with the rotation of the main shaft via the clutch mechanism 92, and the guide 95 moves up and down in conjunction with the rotation, thereby making the upper and lower driving mechanisms The feed table 94 and the upper feed teeth 96 attached to the front end of the upper feed table 94 move up and down.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 2846487 (Page 3, Figure 1, and Figure 3)

However, in the prior art, the upper and lower driving mechanism of the upper feeding table causes the upper feeding table 94, the guide member 95, the crank 93, the upper feeding upper and lower shaft 91, and the clutch mechanism 92 to interlock with each other when the operator lifts the upper feeding table 94. action. That is, if the operator lifts the upper feed table 94, the plurality of members move in synchronization, and therefore, the operator needs to use a large amount of effort to lift the upper feed table.

The present invention has been made in order to solve the above problems, and an object thereof is to provide an upper and lower driving mechanism for feeding a table on a sewing machine which can be lifted by an operator without using too much effort.

In the sewing machine upper and lower driving mechanism of the sewing machine of the present invention, as described in the first paragraph of the patent application, in order to facilitate the understanding of the invention, the symbols attached to the first to seventh embodiments will be described.

a feeding machine upper and lower driving mechanism 7 on a sewing machine, comprising: a feeding table 4 on which an upper feeding tooth 5 is mounted at a front end; and a guiding member 45 for guiding the upper feeding table 4 up and down; and is coupled to the guiding member 45, The upper and lower shafts 39 are rotated in conjunction with the main shaft 9, and the upper feeding table 4 is driven up and down. The upper and lower driving mechanisms 7 of the upper feeding mechanism of the sewing machine are characterized by: a swinging member 40 fixed to one end of the upper and lower shafts 39. And swinging in conjunction with the upper feed upper and lower shafts 39; the link 41 is centered on one end and the other end is movable up and down; and the action piece 40a is in contact with the lower portion of the other end of the link 41 And the swinging member 40 is formed in a separate manner; and the pressure spring 53 presses the guide 45 from above; and the guide 45 is rotatably coupled to the other end of the link 41.

According to this configuration, only the upper feed table 4, the guide member 45, and the link 41 when the upper feed table 4 is lifted up are moved, which is much less than that of the upper and lower feed mechanism of the upper stage. Therefore, the operator can lift the upper feed table 4 without using too much force.

The upper and lower driving mechanism for feeding the table on the sewing machine according to the first aspect of the invention is as described in the second aspect of the patent application, and the configuration in which one end of the link 41 is rotatably coupled to the swinging member 40 can be employed.

According to this configuration, it is possible to save space as compared with a configuration in which one end of the link 41 is coupled to the swing frame 40 or the like, for example, a machine frame or the like.

For example, the upper and lower driving mechanism of the feeding machine on the sewing machine described in the first or second aspect of the patent application is as described in the third item of the patent application scope, and the lifting platform 70 for lifting the upper feeding table 4 can be used. The composition.

According to this configuration, the operator can lift the upper feed table 4 by the upper feed table lifting mechanism 70.

For example, the upper and lower driving mechanism of the feeding machine on the sewing machine described in the third paragraph of the patent application is as described in the fourth paragraph of the patent application, and the operating lever 88 may be provided, and the upper feeding table 4 may be moved in conjunction with the operating lever 88. The composition of the lift lever 72.

According to this configuration, the operator can lift the upper feed table 4 by the lift lever 72 by operating the lever 88.

According to the upper and lower driving mechanism of the feeding table of the sewing machine according to the present invention, since the number of members which move synchronously when the operator lifts the upper feeding table is small, the operator can lift the upper feeding table without using too much force.

1‧‧‧Lock sewing machine

2‧‧‧ machine head

3‧‧‧Send to the room

4‧‧‧Up to the station

5‧‧‧Upper teeth

6‧‧‧ Front and rear drive mechanism

7‧‧‧Up and down drive mechanism

8‧‧‧Machine frame

9‧‧‧ Spindle

11‧‧‧ pole

12‧‧‧ crank

13‧‧‧Swing axis

14‧‧‧ Adjusting the crank

14a‧‧‧ wrist

14b‧‧‧Adjustment slot

16‧‧‧Link connecting rod

17‧‧ ‧ sales

18‧‧‧ crank

19‧‧‧Upper front and rear axles

20‧‧‧ crank

21‧‧‧ collar

22‧‧‧ Washer

23‧‧‧ screws

31‧‧‧Upper cutter shaft

31a‧‧‧Upper knife

32‧‧‧ pole

33‧‧‧ crank

34‧‧‧ Adjusting the crank

34a‧‧‧ wrist

34b‧‧‧Adjustment slot

36‧‧‧Link connecting rod

37‧‧ ‧ sales

38‧‧‧ crank

39‧‧‧Upper up and down axis

40‧‧‧Wobble member

40a‧‧‧Action film

41‧‧‧ Connecting rod

41a‧‧‧Contacts

42‧‧‧ collar

43‧‧‧Washers

44‧‧‧ screws

45‧‧‧ Guides

46‧‧‧Washers

47‧‧‧ screws

51‧‧‧Adjustment screw

52‧‧‧Adjustment nut

53‧‧‧pressure spring

54‧‧‧Press

64‧‧‧ screws

61‧‧‧Upper delivery guide (right)

62‧‧‧Upper delivery guide (left)

65‧‧‧ oil seal

66‧‧‧ Oil seal guides

67, 68‧‧‧ screws

70‧‧‧Up to the platform lifting mechanism

71‧‧‧Cylinder shaft

72‧‧‧ Lifting leverage

72a‧‧‧ Arms

72b‧‧‧Leverage

73‧‧‧ oil seal

74‧‧‧ Spring

75‧‧‧stops

76‧‧‧ actuation axis

77‧‧‧ claws

77a‧‧‧ claws

78‧‧‧ crank

79‧‧‧ Connecting rod

80‧‧‧ claws

80a‧‧‧ claws

81‧‧‧Cylinder

82‧‧‧Slit

83‧‧‧Helical spring

84‧‧‧ Pressing foot stick

84a‧‧‧With the Ministry

85‧‧‧Foot table

86‧‧‧Adjustment nut

87‧‧‧Adjustment screw

88‧‧‧Operation lever

88a‧‧ sales

Figure 1 is a left side view of the lock stitch sewing machine of the present invention.

Fig. 2 is a perspective view showing the front and rear drive mechanism and the upper and lower drive mechanisms of the upper feed table of the present invention.

Fig. 3 is a cross-sectional view of the main part of the front and rear drive mechanism and the upper and lower drive mechanism of the upper feed table of the present invention from the right side.

Fig. 4 is an exploded perspective view showing the main part of the front rear drive mechanism and the vertical drive mechanism shown in Fig. 2.

Fig. 5 is a cross-sectional view of an essential part of the lock stitch sewing machine shown in Fig. 1 and omitted from the left side.

Fig. 6 is an enlarged view of the essential part of Fig. 5.

Fig. 7 is a cross-sectional view showing the essential part of the upper feed table lifting mechanism of the lock stitch sewing machine shown in Fig. 1.

Fig. 8 is a perspective view showing the front and rear drive mechanism and the upper and lower drive mechanism of the conventional upper feed table.

[Formation of the Invention]

Hereinafter, a preferred embodiment of the lock stitch sewing machine of the present invention will be described with reference to the drawings.

As shown in Fig. 1, an upper feed table chamber 3 is provided below the head portion 2 of the lock stitch sewing machine 1. Arranged in the upper and lower stage chambers 3 The feeding table 4, one end of the upper feeding table 4 protrudes from the front surface of the upper feeding table chamber 3, and the upper feeding teeth 5 are attached to the front end thereof. As shown in Fig. 2, the upper feed table 4 is coupled to the rear drive mechanism 6 and the upper feed table 4 to drive the upper and lower drive mechanisms 7 before and after the upper feed table 4 is driven forward and backward.

First, the front and rear drive mechanism 6 will be described. As shown in Fig. 3, a main shaft 9 that rotates about an axis is disposed inside the casing 8 of the lock stitch sewing machine 1, and is provided at one end of the eccentric portion fitting rod 11 of the main shaft 9. The other end of the rod 11 is coupled to the joint portion of the crank 12, and the base of the crank 12 is fixed to the swing shaft 13. The swing shaft 13 is rotatably supported by the frame 8. The rod 11, the crank 12, and the swing shaft 13 are swung by the rotation of the main shaft 9. The adjustment crank 14 has a base fixed to the swing shaft 13 and has an arc-shaped arm portion 14a extending rearward from the base. The wrist portion 14a has a right side opening The adjustment groove 14b of the glyph.

A slider (not shown) is fitted into the adjustment groove 14b, and one end of the slider and the connecting link 16 is coupled via a pin 17. The slider is slidable within the adjustment groove 14b. The other end of the connecting link 16 is coupled to the connecting portion of the crank 18, and the base of the crank 18 is fixed to one end of the upper and lower shafts 19. When the adjustment crank 14 swings about the swing shaft 13 in accordance with the swing of the swing shaft 13, the swing of the adjustment crank 14 is transmitted to the upper feed front and rear shafts 19 via the slider, the link link 16, and the crank 18, so that the front and rear shafts 19 are lifted. Swing around the axis. Further, one end of the front and rear feed cranks 20 is fixed to the other end of the front and rear feed shafts 19, and the other end of the front and rear feed cranks 20 is coupled to the base end of the upper feed table 4. Further, the front feed front and rear shafts 19 and the front and rear feed cranks 20 may be integrally formed. The base end of the upper feed table 4 is rotatably coupled to the other end of the front and rear delivery crank 20 by a collar 21, a washer 22, and a screw 23. When the front and rear axles 19 are swung around the axis, they are sent back and forth. The other end of the crank 20 is swung back and forth so that the upper feed table 4 and the upper feed tooth attached to the front end of the upper feed table 4 are swung back and forth.

Next, the vertical drive mechanism 7 will be described. As shown in the second and third figures, the cutter shaft 31 is rotatably supported around the frame 8, and is coupled to the main shaft 9 via the rod 32 and the crank 33, and is unidirectionally rotated by the spindle 9. Swing around the axis. An upper cutter table 31a to which an upper cutter (not shown) is attached is fixed to one end of the upper cutter shaft 31. As shown in Fig. 3, the adjustment crank 34 has its base fixed to the upper cutter shaft 31, and has an arc-shaped arm portion 34a extending upward from the base portion. The wrist portion 34a has a right side opening The adjustment groove 34b of the glyph.

A slider (not shown) is fitted into the adjustment groove 34b, and one end of the slider and the connecting link 36 is coupled via a pin 37. The slider is slidable within the adjustment groove 34b. The other end of the connecting link 36 is coupled to the connecting portion of the crank 38, and the base of the crank 38 is fixed to one end of the upper and lower shafts 39. When the adjustment crank 34 is swung around the upper cutter shaft 31 by the swing of the upper cutter shaft 31, the swing of the adjustment crank 34 is transmitted to the upper feed upper and lower shafts 39 via the slider, the link link 36, and the crank 38, thereby The upper and lower shafts 39 are pivoted about the axis.

Fig. 5 is a cross-sectional view of the essential part, and the guide member 63, the screw 64, and the arm portion 72a of the lift lever 72, which will be described later, are omitted. The base of the swinging member 40 is fixed to the other end of the upper and lower shafts 39. Further, the upper feed vertical shaft 39 and the swing member 40 may be integrally formed. The swinging member 40 extends downward from the base thereof, and a horizontally extending action piece 40a is formed at a lower end portion of the swinging member 40. One end of the link 41 is coupled to the base of the swinging member 40 by a collar 42, a washer 43, and a screw 44. The upper and lower shafts 39 are on the same line as the axis of the collar 42 so that the link 41 can be rotated about the collar 42. The guide 45 is rotatably coupled to the other end of the link 41 by a washer 46 and a screw 47. That is, the link 41 can be connected to one end of the swing member 40 as a center, and the other end connected to the guide 45 can be moved up and down. Further, one end of the link 41 may be coupled to, for example, the frame 8 in addition to the swing member 40. However, as in the present embodiment, if the swing member 40 is coupled, the structure of the frame 8 can be reduced and compact. The upper and lower drive mechanisms 7 are housed. A contact portion 41a extending upward and downward is formed at a lower portion of the other end of the link 41. The action piece 40a of the swinging member 40 and the contact portion 41a are arranged to be partially contactable and separated. A gap is formed between the upper surface of the action piece 40a and the link 41. The guide 45 has an opening on the left side The guiding groove 45a of the glyph. The upper feeding table 4 is inserted into the guiding groove 45a so as to be slidable back and forth. The guiding member 45 is used to guide the upper feeding table 4 to move up and down and to move back and forth.

When the upper feed vertical shaft 39 swings around the shaft, the action piece 40a of the swinging member 40 swings. The rise of the guide member 45 is as shown in Fig. 6, and the action piece 40a is swung in a direction (hereinafter referred to as a contact direction) X in contact with the contact portion 41a, and in a state where the action piece 40a is in contact with the contact portion 41a, The swinging member 40 is achieved by lifting the other end of the link 41. Further, as shown in Fig. 5, an adjusting screw 51 is fitted into the adjusting nut 52, and the lower end of the adjusting screw 51 presses the pressing spring 53. The compression spring 53 presses the pressing rod 54 by its elastic force, and the lower end of the pressing rod 54 presses the upper surface of the guide 45. As a result, as shown in Fig. 6, even when the action piece 40a is swung in a direction away from the contact portion 41a (hereinafter referred to as a separation direction) Y, the action piece 40a does not leave the contact portion 41a. That is, the contact portion 41a follows the action piece 40a, so that the contact state of the action piece 40a and the contact portion 41a can be maintained. The force of the pressing rod 54 pressing the guide 45 can be performed by loosening the adjusting nut 52 and rotating the adjusting screw 51. Adjustment. Thereby, the action piece 40a is swung in the contact direction X by the swing of the up-and-down vertical shaft 39, and the other end of the link 41 is lifted up, so that the guide 45 rises. Further, the action piece 40a is swung in the separation direction Y by the swing of the upper and lower shafts 39, and the pressing rod 54 presses the guide 45 so that the guide 45 and the other end of the link 41 are lowered. As described above, the upper feed table 4 moves up and down via the guide 45 as the swinging member 40 swings and the up and down movement of the other end of the link 41 by the swing. The upper feeding table 4 and the upper feeding table 4 are sent on the upper and lower movements of the upper feeding table 4 and the upper and lower movements of the upper feeding table 4 by the upper and lower driving mechanisms 7 according to the front and rear driving mechanisms 6 described above. The teeth 5 are elliptical in a vertical plane along the feed direction F of the fabric.

Reference numeral 63 shown in Fig. 4 is a guide member 63 which is fixed to the frame 8 with a screw 64. The guiding member 63 guides the upper and lower movements of the guide 45. Symbols 61 and 62 are the upper feed guide (right) 61 and the upper feed guide (left) 62, which guide the front and rear movements of the upper feed table 4 and the vertical movement. A groove is formed in front of the upper feeding guide (right) 61 and the upper feeding guide (left) 62, and an oil sealing ring 65 is embedded in the groove, and an upper feeding table is inserted in the oil sealing ring 65 4. Further, the oil seal ring guide 66 is fixed to the upper feed table guide (right) 61 by screws 67 and 68.

Next, the upper feed table lifting mechanism 70 will be described. Fig. 7 is a cross-sectional view showing the essential part of the upper feed table lifting mechanism 70. As shown in Fig. 7, the base of the lift lever 72 is fixed to the axial end of the cylindrical shaft 71. Further, the cylinder shaft 71 and the lift lever 72 may be integrally formed. The lift lever 72 is formed with an arm portion 72a extending forward from the base portion thereof, and the arm portion 72a is disposed in the upper feed table chamber 3 so as to penetrate the upper feed table chamber 3 from the rear. Embedding oil tightness in the arm portion 72a The ring 73 is sealed to seal the upper stage chamber 3. The front end of the arm portion 72a is detachably disposed on the guide groove 45a of the guide member 45. Further, the base portion of the lift lift lever 72 is extended upward to form a lever portion 72b. As shown in Fig. 7, by the spring 74 acting on the lever portion 72b, the lift lever 72 is biased clockwise together with the cylinder shaft 71. The force is blocked by the stopper 75. The front end of the lever portion 72b is external to the frame 8, and is disposed to be engageable with the claw portion 77a of the claw rod 77 fixed to one end of the operating shaft 76. The actuating shaft 76 is configured to be rotatable by passing the other end thereof through the frame 8 and extending inside the nose portion 2. Inside the nose portion 2, the base of the crank 78 is fixed to the other end of the operating shaft 76. The connecting portion of the crank 78 is coupled to one end of the link 79, and the other end of the link 79 connects the connecting portion of the claw rod 80. A claw portion 80a is formed in the claw rod 80, and the claw portion 80a is disposed in the vicinity of the slit 82 formed in the cylindrical body 81. The cylindrical body 81 is supported by the frame 8, and a coil spring 83 and a presser bar 84 are disposed in the cylindrical body 81. The front end of the presser bar 84 protrudes outside the frame 8, and as shown in Fig. 1, the presser foot 85 is pressed by the elastic force of the spring 83. A presser foot (not shown) is attached to the front end of the presser foot 85. An engaging portion 84a is formed on the presser bar 84 in the middle of the inside of the nose portion 2. The engaging portion 84a is disposed above the claw portion 80a of the claw lever 80 by the presser bar 84 extending rearward through the slit 82. The force of the presser bar 84 pressing the presser foot 85 can be adjusted by loosening the adjusting nut 86 and turning the adjusting screw 87.

As shown in FIG. 1, the frame 8 of the upper feed table lifting mechanism 70 which is external to the nose portion 2 is provided with an operation lever 88. The free end of the operating lever 88 is formed to extend upward from the base end. A pin 88a is formed at the base end of the operating lever 88, and the pin 88a is disposed in the base head 2 through the frame 8. As shown in Fig. 7, the base of the claw rod 80 is fixed to the pin 88a. By operating the lever The free end of the 88 is pressed toward the rear, and the claw lever 80 is rotated counterclockwise in the seventh figure around the pin 88a, so that the claw portion 80a is engaged with the engaging portion 84a of the presser bar 84 to lift the presser bar 84. Then, the pressing of the presser foot 85 is released. Further, the claw lever 80 is rotated counterclockwise in the seventh figure about the pin 88a to swing the link 79, the crank 78, and the actuating shaft 76, and the claw lever 77 is centered on the actuating shaft 76 toward the seventh figure. Turn clockwise in the middle. Then, the claw portion 77a of the claw lever 77 is engaged with the front end of the lever portion 72b of the lift lever 72 so that the lift lever 72 is rotated counterclockwise in the sixth figure about the cylinder shaft 71, thereby lifting The front end of the arm portion 72a of the lever 72 is engaged with the guide groove 45a of the guide 45, and the guide 45 and the upper feed table 4 are lifted up. Therefore, by the turning operation of the operating lever 88, the pressing of the presser foot 85 is released and the upper feeding tooth 5 is raised. For example, when the operator lifts the upper feed table 4 by the upper feed table lifting mechanism 70, the member that is interlocked with the upper and lower drive mechanism 7 is only the guide 45 and the link 41, so that the operator does not need to use a large force. You can lift the upper feed station 4.

The present invention is not limited to the above-described embodiments, and various modifications may be added to the above-described embodiments without departing from the spirit and scope of the invention, and the present invention of course includes the modifications. .

1‧‧‧Lock sewing machine

2‧‧‧ machine head

3‧‧‧Send to the room

4‧‧‧Up to the station

5‧‧‧Upper teeth

8‧‧‧Machine frame

20‧‧‧ crank

22‧‧‧ Washer

23‧‧‧ screws

40a‧‧‧Action film

41‧‧‧ Connecting rod

41a‧‧‧Contacts

43‧‧‧Washers

44‧‧‧ screws

45‧‧‧ Guides

51‧‧‧Adjustment screw

52‧‧‧Adjustment nut

53‧‧‧pressure spring

54‧‧‧Press

61‧‧‧Upper delivery guide (right)

62‧‧‧Upper delivery guide (left)

66‧‧‧ Oil seal guides

71‧‧‧Cylinder shaft

72‧‧‧ Lifting leverage

72b‧‧‧Leverage

73‧‧‧ oil seal

74‧‧‧ Spring

75‧‧‧stops

Claims (4)

a feeding machine upper and lower driving mechanism on the sewing machine, wherein the upper and lower driving mechanism of the feeding table of the sewing machine has a feeding platform on which the upper feeding tooth is mounted at the front end; and a guiding member for guiding the upper feeding table up and down; and is connected to the guiding member The upper and lower driving mechanism is driven up and down by rotating the upper and lower shafts in conjunction with the main shaft, and the upper and lower driving mechanisms of the upper feeding mechanism of the sewing machine are characterized by: a swinging member fixed to one end of the upper and lower shafts, and Swinging in conjunction with the upper and lower shafts; the connecting rod is centered on one end of the connecting rod and the other end of the connecting rod is movable up and down; the acting piece is movable to the other end of the connecting rod a lower contact and a separate arrangement are formed in the swinging member; and a compression spring that presses the guide from above; and the guide is rotatably coupled to the other end of the link. The upper and lower driving mechanism of the feeding machine is provided on the sewing machine of the first aspect of the patent application, wherein one end of the connecting rod is rotatably coupled to the swinging member. For example, in the sewing machine of claim 1 or 2, the upper and lower driving mechanism of the feeding table is provided, and the lifting mechanism for lifting the upper feeding table is provided. For example, the upper and lower driving mechanism of the feeding machine is provided on the sewing machine of claim 3, wherein the lifting platform lifting mechanism has an operating lever and a lifting lever that moves the upper feeding table in conjunction with the operating lever.