TW568970B - Horizontally rotating shuttle of sewing machine - Google Patents

Abstract

To stop a shuttle body before the engaging projection of the shuttle body bumps against retaining members without overrunning when an opener acts on the shuttle body. A horizontally rotating shuttle of a sewing machine. An opener is used for the horizontally rotating shuttle having a rotating hook rotating in synchronization with the vertical movement of a machine needle, and a shuttle body which is rotatably supported by the rotating hook and has an engaging projection and a contact portion on the outer periphery of the shuttle body. The engaging protection is idly fitted in between two position-immovable fixed retaining members. The opener 5 is made movable by driving means between a position where the front end portion of the opener 5 pushes the contact portion 2b in a direction opposite to the direction in which the rotating hook rotates and a position where the front end portion thereof is separated from the contact portion 2b. When the opener 5 pushes the contact portion 2b in the direction opposite to the direction in which the rotating hook rotates, a vertical component of a force acts on the contact portion 2b.

Description

568970 V. Description of the invention (1) A7 B7 printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs [Technical Field] The present invention relates to a horizontal rotary shuttle that locks a sewing machine and has a-shuttle body by The shuttle is held in a non-rotatable manner between the retaining members in the moving position. This shuttle = into-a gap 'This gap can force shuttle Zhao to rotate in the opposite direction of the _ turning hook rotation' and the-needle thread slips The human shuttle body engages between the protrusion and the retaining member. [Related technical description] As shown in Fig. 1 (1), a horizontal rotary shuttle of a locking suture machine is mainly composed of a rotary hook 1 and a shuttle body 2. The engaging protrusions of the shuttle body 2 are fitted in an inert state between a pair of retaining members 3 and 4 on the bottom surface of a throat plate, so that the shuttle body 2 cannot freely move when the rotary hook 1 rotates. Generally, although the engaging protrusion 2a is kept in engagement with a retaining member (ie, the retaining member 3), the shuttle body 2 is rotated by the friction generated by the rotation of the rotary hook 1, so that a needle thread loop runs around the shuttle body without It is possible to slip into between the engaging projection 2 a and the holding member 3, and the operation of forming the seam is hindered because a large tensile strength is applied to the needle thread loop. As a result, the horizontal rotary lock of the locking suture machine has an opener 5 capable of pushing and removing the contact portion 2b. Such an opener 5 that moves circularly by a known driving mechanism is as shown in FIG. 1 (2). It is shown that the contact portion 2b is moved in the direction of the arrow (b) to push the contact portion 2b to form a gap between the engaging protrusion and the holding member 3. Therefore, the needle thread ring 6 can be smoothly slid into the gap. The relative planes of the opener 5 and the contact portion 2b are vertical planes as shown in Fig. 2 (2); or another combination of vertical and curved planes. And when the opener 5 is pushed in the opposite direction of the shuttle body turning as shown by the arrow (a) in FIG. 1 (1)

(Please read the notes on the back before filling this page)

^ 68970

Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7, Description of the Invention (2) When the contact portion 2b is contacted, the configuration of the engagement protrusion 2a can be stopped before it hits the holding member 4. [Problems Solved by the Invention] When the machine is operating at a high speed, a small amount of oil is supplied to the shuttle body, but 'because the oil is not supplied to the plastic bearing ring, the opener 5 pushes the contact portion 2b in the direction of the arrow (b). Due to the generated impact, the shuttle body 2 may exceed 'in the reverse direction of the arrow (a), so that the engaging protrusion 2 a collides with the holding member 4. When the shuttle body is exceeded, a rattling sound will be generated due to the impact between the engaging projection 2a and the holding member 4. Further, as shown in FIG. 1 (3), the needle thread 6 is held between the engaging projection 2a and the throat plate holding member 4, so that the slip-in of the needle thread 6 is blocked, and unnecessary resistance is applied to the needle thread 6. Due to the hindered slip-in effect of the needle thread 6 'will cause the needle thread 6 to perform unstable and cause the thread to be tightened poorly and the sewing to be poor (such as when cutting the thread). Further, the opener 5 will push the contact portion 21) side in the direction of the arrow (b) to cause the shuttle body 2 to rotate a specific angle to withdraw the bobbin thread 7. However, when the bobbin body 2 is exceeded, it is easy to cause an unsteady extraction amount of the bobbin thread, thereby causing uneven sewing. An object of the present invention is to stop the shuttle body before the engaging protrusion of the shuttle body collides with the retaining member, so as not to cause an overshoot when the opener acts on the shuttle body. [Solution to Problem] A horizontal rotary shuttle of a sewing machine according to the present invention, wherein an opener is used for the horizontal rotary shuttle. The horizontal rotary shuttle has a rotary hook and a shuttle body 2. The rotary hook is perpendicular to a needle. The movement rotates synchronously. The shuttle body 2 is rotatably supported by the rotating hook 1 and has an engaging protrusion. ------- line (please read the notes on the back before filling this page)

568970

Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs and on the outer periphery of the shuttle-contact part 2b, # 合 突 部 2aa is inertly fitted between the two fixed holding members 3 and 4 in the immovable position by the driving device The opener 5 is appropriately moved between a position where the front end portion of the opener 5 pushes one of the contact portions 2b in a direction opposite to the rotation of the rotary hook and a position where the front end portion separates from the contact portion ，, and is characterized in that when the opener 5 When the contact portion is pushed in the direction in which the rotary hook is turned in the opposite direction, a vertical component of a force acts on the contact portion 2b. Although the relative plane (2b, or 5,) of the contact portion 2b or the opener 5 is an inclined plane, the relative plane (5, or 沘,) of the opener 5 or the other contact portions 2b is a curved plane. The opposing planes (2b, and 5,) of the opener 5 and the contact portion 2b are inclined planes. The sliding part (shuttle body bearing ring) 2C of the shuttle body is made of synthetic resin and does not have any lubrication unit that supplies lubricating oil to the sliding part 2C. [Executive Mode of the Invention] A horizontal rotary shuttle for implementing a sewing machine according to the present invention will now be described with reference to Figs. 1 (1), 3, and 4. The opener of the horizontal rotary shuttle used to lock the suture machine according to the present invention has a structure very similar to the conventional example shown in Fig. 1 (1) without affecting the essence of the present invention. The basic structure of the opener is briefly described with reference to FIG. 1 (1). The horizontal rotary shuttle uses an opener. The horizontal rotary shuttle has a rotary hook 1 and a shuttle body 2. The rotary hook is rotated synchronously with the vertical movement of a needle. The shuttle body 2 is rotatably supported by the rotary hook 1. And it has a paper size that applies the Chinese National Standard (CNS) A4 specification (210 X 297 mm) F Pack -------- II — ^ ------- (Please read the note on the back first (Fill in this page again) 568970

Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (4) The projecting part 2a and a contact part 2b located on the outer periphery. The engaging projection 2a is fitted in an inert state between the holding members 3 and 4 in the two immovable positions. The opener 5 can push a position of the contact portion 2b of the shuttle body with the front end portion of the shuttle body in a direction opposite to the direction of the rotary hook (indicated by the arrow) by the drive mechanism of the opener $. The body contact portion 2b is appropriately moved between one of the separated positions. Although the retaining members 3 and 4 are usually disposed under a throat plate, in some cases, they can be disposed on a member other than the throat plate. The drive device (not shown) for circular movement of the tip of the opener 5 may use a conventional drive mechanism. In addition, for example, another type of driving mechanism that performs linear movement instead of circular movement can be applied. The basic structure is defined above, but the horizontal rotary shuttle according to the present invention is characterized in that when the front end portion of the opener 5 pushes the contact portion 2b in the direction in which the rotary hook turns in the opposite direction (shown by arrow h_), the contact portion The respective planar structures of 2b and the opener 5 are different from those described below, whereby a vertical component of a force is applied to the contact portion 2b. Figs. 4 (1) to (8) show examples of respective configurations of the relatively flat surfaces of the opener 5 and the contact portion 2b. The example shown in Fig. 4 (1a) represents a configuration in which the respective opposing planes 5, and 21 of the opener 5 and the contact portion 2 are inclined at an angle of 5 to 4 ^ and horizontally toward each other. In the example shown in FIG. 4 (la), when the opener 5 pushes the contact portion hole, the inclined planes are brought into contact with each other as shown in FIG. 4 (lb). Therefore, the contact portion 沘 can receive a vector force F which is skewed downward from the opener 5. Vector force F of the paper size of paper @ @ 家 标准 (CNS) A4 specifications (210 X 297 public) (Please read the precautions on the back before filling this page) 568970 A7 B7 V. Description of the invention (5) ( Please read the precautions on the back before filling in this page.) The action of the flat component Fa will open the gap between the engaging protrusion 2a and the retaining member 3. The action of the vertical component Fb will push the shuttle body 2 downwards and the vertical component. This effect of Fa prevents the shuttle body 2 from being shaken vertically due to the impact caused by the opener 5 pushing the contact portion 21) inward, and allows the shuttle body bearing ring 2c to stick to a rotating hook bearing ring surface la; therefore, it may be suppressed The shuttle body 2 is overdriven in the pushing direction (the direction opposite to the turning hook turning) due to the friction therebetween. In the examples shown in Figs. 4 (2) and (3), the opposite plane 5 of the opener 5 or the opposite plane 2b 'of the contact portion 2b is changed from an inclined plane to a curved plane. In detail, the opposite plane 2b of the contact portion 2b is a curved plane in the example shown in Fig. 4 (2), and the opposite plane 5 of the opener 5 is in the example shown in Fig. 4 (3). Bend the plane. In these examples, the vertical component of the vector force received by the contact portion 21) from the opener 5 is downward as shown in the example shown in Fig. 4 (1a). In the example shown in Figure 4 (4) printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the relative plane 5 of the opener 5 and the relative plane 2b of the shuttle contact portion are inclined in the same direction as in Section 4 (1a) The picture is different. The vertical component of the vector force received by the contact portion 2b from the opener 5 is directed upward and has a function of pushing the shuttle body 22 upward. However, this effect of the vertical component can also prevent the shuttle body 2 from shaking vertically because the opener 5 pushes the contact portion 2 b inward, and stick the shuttle body bearing ring 2c on a rotating hook bearing ring surface ia; therefore, it is possible The shuttle body 2 is prevented from being overrun in the pushing direction (the direction opposite to the rotation of the rotating hook). In the example shown in Figs. 4 (5) and (6), as shown in Figs. 4 (2) and (3), the relative plane 5 of the opener 5 or the opposite plane 2b of the shuttle contact portion is inclined from The plane becomes a curved plane. In detail, relative to the plane 2b of the contact portion 2b, the paper size is applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 cm) 568970

The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the f-curved plane in the example shown in Fig. 4 (5), and the opposite plane 5 'of the opener 5 is curved in the example shown in Fig. 4 (6) flat. In these examples, the vertical component of the vector force received by the contact portion 2b from the opener 5 faces downward as in the example shown in FIG. 4 (4). In any of the above examples, the opener 5 acts on the contact portion 2b in the horizontal direction (the pivoting or linear sliding direction of the opener 5). However, the opener 5 can be designed so that it can be skewed upwards or downwards as shown in FIG. 4 (7). In these cases, the relative plane 2b of the contact portion of the shuttle body can be inclined to the side. The forward direction of the opener 5 is received. However, it is also possible to use a vector force applied from the opener 5 to the contact portion 2b to generate a vertical component facing downward or downward with a similar effect. As described above, the configuration of the relative plane 5 'of the opener 5 and the relative plane 2b' of the contact portion 2b is such that the shuttle body bearing ring 2C can be adhered to the rotary hook bearing ring surface la to prevent the shuttle body from exceeding. However, the following is based on additional knowledge and can be incorporated into the above. The above knowledge can be expected to solve the overshooting problem of the shuttle body 2 by smoothly sliding the shuttle body 2 on the rotary hook 1, and has been confirmed by experiments. In detail, a plastic shuttle body bearing ring (a sliding part of the shuttle body) 2c is used instead of a lubrication unit (such as a plunger pump) to supply lubricating oil to the rotary hook 1 and the rotary hook bobbin case clamp. The sliding part makes the shuttle body 2 slide smoothly on the rotating hook 丨. [Effects of the invention] In the first and second items of the scope of patent application according to the present invention, when the opener pushes the contact portion of the shuttle body in the opposite direction of the rotating hook, the paper size of the paper applies the Chinese National Standard (CNS) A4 size (210 X 297 mm) 9 (Please read the notes on the back before filling out this page) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

568970 A7 B7 V. Description of the invention (7) The vertical component of the quantity acts on the contact part of the shuttle body, so the impact between the opener and the contact part of the shuttle body when the sewing machine is operated at high speed, and the engagement of the shuttle body The homesickness sound produced by the collision between the protrusion and the clasp is reduced. In addition, since the disturbance of the needle thread caused by the bobbin body being exceeded can be reduced, the needle thread can be smoothly contacted to the shuttle body, and the poor tightening and sewing of the thread can be reduced (for example, the cutting of the thread or the like). The regular movement is maintained, so that the bobbin thread has a stable extraction amount and has the effect of improving uneven sewing. According to the third item of the patent application scope of the present invention, the relative planes of the contact portion of the shuttle body and the opener are equal. It is made into an inclined plane, so that the opener and the shuttle body contact part make face-to-face contact, so the above effect is further increased. According to item 4 of the patent application scope of the present invention, even if the plastic sliding part of the shuttle body is applied to the horizontal rotation of a sewing machine The shuttle does not have a lubricating unit that supplies lubricating oil to the sliding portion of the shuttle body, and can still achieve the effect of the scope of patent application No. 1. Therefore, it is not necessary to supply oil to the shuttle body, so the sewing machine can have a kind of sewing without oil breakage The product's horizontal rotary shuttle. And because it is no longer necessary to supply oil to any unit of the shuttle body, it can also provide cheap sewing machines. [Description] [Fig. 1] A diagram showing the function of an opener in a horizontal rotary shuttle includes: (1) a plan view; (2) showing between the engaging protrusion of a shuttle body and a retaining member in normal operation Schematic diagram of the relationship; and (3) The paper size of the shuttle body when the shuttle body is exceeded is applicable to the Chinese country ¥ (cns) A4 size x 297 public love)

568970 V.

Printed by the Employees' Cooperative of the Intellectual Property Bureau of the Ministry of Economics Description of the Invention (8) A diagram of the relationship between the joint protrusion and another retaining member. [Fig. 2] ⑴_ (2) The structure of the contact part of the shuttle body and the relative plane of the conventional opener are shown in the figure. [Figure 3] A vertical cross-sectional view showing the condition of a rotating hook and a sliding portion of the shuttle body. [Fig. 4] (la)-(ib)-(8) The example of the structure of the contact part of the shuttle body and the relative plane of the opener is shown in the figure. Component label comparison -------------- install ------- I order ----II --- line (Please read the precautions on the back before filling this page) 1 ··· Rotary hook la ··· Sliding part (bearing torus) of the rotary hook bobbin case jig 2 ··· shuttle body 2a ·· joining protrusion 2 b ·· · contact portion 2b '··· of the shuttle body Relative plane of the contact part 3 ..holding member 4 ... holding member 5 .. opener 5 '..... relative plane of opener 11 This paper size applies to China National Standard (CNS) A4 (210 x 297) Mm)

Claims (1)

568970 6. The scope of patent application: L-type horizontal rotary shuttle with sewing machine, in which the horizontal rotary shuttle is used: opener, the horizontal rotary shuttle has an indigo hook with two vertical rotations of a needle, and has a A shuttle body, which is rotatably supported by the rotary fishing, and has an engaging protrusion and a contact portion on the outer periphery of the bit body. The engaging protrusion is arranged in an inert state: fixed buckles in two immovable positions. Between the holding members, the opener can be used to make the opener push the shuttle body to contact one of the positions of the front end of the opener in the direction in which the rotary hook turns in the opposite direction to the front 鳊 Deng's contact with the shuttle body. A part of the part is moved appropriately between the positions, which is characterized in that when the opener pushes the contact part in the opposite direction of the rotating hook turning, a vertical component of a force acts on the contact part. 2. The horizontal rotary shuttle of the sewing machine as claimed in item 1 of the patent application, wherein when the relative plane of the contact portion of the opener or the shuttle body is an inclined plane, the relative plane of the opener or the other contact portions is a kind of curvature Plane. 3. If the horizontal rotary shuttle of the sewing machine according to item 丨 of the patent application, wherein the relative planes of the contact portion of the opener and the shuttle body are inclined planes. 4. The horizontal rotary shuttle of a sewing machine as claimed in any one of the claims 1 to 3, wherein the sliding portion of the shuttle body is made of synthetic resin, and there is no slide to supply lubricant to the shuttle body Any of the lubricants HS-Soap 7G. This paper size applies to China National Standard (CNS) A4 (210 x 297 mm) line Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 12