TW517121B - Moving device for sewing machine - Google Patents

Abstract

To provide a sewing machine capable of achieving unlubrication of a frictional contact portion and of reducing a manufacturing load and a weight. A friction surface for contact while causing friction in a sewing machine 10 carrying out a movement such as a sliding movement or a rotational movement at a high speed and a high load is constituted by using rice bran ceramics. For example, a bearing 100 has such a structure that a bush-shaped mold 102 formed of the rice bran ceramics is fitted and fixed into the inside of a housing member 101 acting as an outer frame of the bearing 100 and formed of a metal. According to the structure, an inner surface 102A to be a friction surface of a side surface of a shaft and the bearing 100 is formed of the rice bran ceramic having a small coefficient of friction and unlubrication can be achieved.

Description

517121 Printed Agriculture A by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs; B7 V. Description of the invention (1) Detailed description of the invention_Industrial_Industrial Application 簌 圊 The present invention relates to a sewing machine, the sliding and rotating parts of which are No lubrication required. I know the art, "The transmission part of the sewing machine with several parts used in the first industry, where the parts for sliding and rotating contact each other, and the main part that generates friction under high speed and high load is a shaft And a bearing. Generally, shafts and bearings are made of metal materials. In most cases, the addition of wetting π is caused by seizure or normal abrasion of the metallic material, such as abrasion. When lubricating oil is added to the contact portion of a sewing machine used industrially, the heat generated by friction in the contact portion is reduced. Therefore, it is necessary to provide an oil adding device to forcefully add the lubricating oil. The oil adding device includes, for example, an oil conveying path for adding lubricating oil to the contact portion, an oil pan for storing the lubricating oil, and a pump for drawing the lubricating oil. With this structure, the lubricating oil can be drawn from the oil pan via a pump, and circulated and added to each contact portion via a conveying path. The abrasion caused by sliding motion or rotating motion and the resistance generated by sliding motion, rotating motion, or the same motion are related to the speed of sliding or rotating motion and applied during sliding and rotating motion The PV value determined by the surface pressure (load) is extremely relevant. More specifically, when the speed or the surface pressure is higher, the friction coefficient is increased and thus the abrasion and the resistance generated are increased. This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) (Please read the precautions on the back before you page this page)-Pack 4 V. Description of the invention (2) Questions to be solved by the invention / In a sewing machine with this structure, the lubricant is added to the contact portion when the needle bar is vertical at high speed during the complex movement, the swing of the balance member or the rotation of the needle bar crank lever, for example, if a large amount of lubrication is added Oil, and the lubricant spreads around the sewing machine and thus leaks to the outside of the sewing machine, soiling the stitched items. Conversely, if the amount of lubricating oil to be added is reduced, the contact portion may cause abnormal wear or seizure. Furthermore, if the contact portion is provided with an oil adding device for adding the above-mentioned lubricating oil ', the number of fittings increases, so the manufacturing load increases and the cost increases, and the weight of the sewing machine is further increased. Therefore, it is a trend that the contact parts of the sewing machine do not need lubrication. In order to achieve the purpose of not requiring lubrication, attempts have been made to coat the surface of metallic materials as the friction surface of the contact portion, for example, a coating such as TiN or DLC and coated with lubricated MoS24 Teflon Or use a wear-resistant resin material or carbon fiber reinforced resin (CFRP). However, there is a possibility that the coating formed on the metal surface will be worn or peeled off after prolonged use, thereby rendering it ineffective. In addition, since conventional abrasion-resistant resin materials generally have large thermal expansion coefficients, they are greatly deformed by heat generated by sliding or rotating motions. In most cases, what's more, traditional abrasion-resistant resin materials generally need to be processed in order to obtain sufficient dimensional accuracy and are easy to wear. Therefore, the frictional sliding part of a sewing machine used in industry cannot be sufficiently achieved without requiring lubrication. 1 517121

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In view of the environment, one of the objectives of the present invention is to propose a sewing machine that can reach the contact part without lubrication, and can reduce the manufacturing load and weight. What is needed_ The first aspect of the present invention is directed to a sewing machine 10 that includes contact portions of parts that are in contact with each other, and at the same time causes friction of the parts due to movements such as sliding or turning as shown in FIG. 10, For example, the contact portion of at least one of the fittings is made of a hard porous carbon material. Depending on the configuration, a hard porous carbon material has a small coefficient of friction. Therefore, the amount of friction caused by the contact movement of the accessory can be reduced, and at the same time the heat generated can be reduced. Therefore, it is possible to enhance the abrasion resistance and heat resistance of the contact portion. Thus, the characteristics of the sewing machine that do not require lubrication can be achieved. In addition, it is not necessary to add lubricant to the contact portion. Therefore, it is not necessary to include an oil adding device such as a delivery 4 diameter, an oil pan or a pump to add lubricant to the sewing machine. Therefore, the weight of the sewing machine can be reduced. Contact again. The parts are made of hard porous carbon material, which has a lower density than metallic materials. Therefore, the weight of the sewing machine can be further reduced. In addition, there is no device for adding lubricant. Therefore, the number of sewing machine parts can be reduced and the manufacturing load of the sewing machine can be reduced. It also reduces manufacturing costs. At the same time, it is possible to perform an operation for performing an in-line sliding motion with respect to an axial reciprocating motion, an operation for rotating along the center of the axis, and an operation for rotating with a moving motion. In addition, a cylindrical shaft is used to complete the sliding movement in the axial direction I · 11 (Please read the precautions on the back before this page) Magic: -Line-This paper size applies to China National Standard (CNS) A4 (210 x 297 g) 6 517 121

Printed by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (4) The movement of the 疋 or the combination of its movement can be stored by a bearing. The bearing has a cylindrical part inside it. The shaft is inserted into it, or the stern shaft can have an optional cross-sectional shape to complete the linear / moon movement in the longitudinal direction, which can be achieved by the bearing with an internal cylindrical portion. The shaft is housed therein, and the shaft portion has a shape corresponding to the cross section of the shaft. For example, a bearing (a metal part 19A on the needle bar and a metal part 19B below the needle bar) arranged in a swinging platform on the right side, a sliding bearing of a balance member, and a bearing disposed on the base are according to the first aspect of the present invention. -The construction of the point of view is applied so that it can properly achieve the goal without lubrication. In addition, for example, in the case where the structure according to the first aspect of the present invention is applied to a bearing, a member made of a hard porous carbon material in the shape of a bush can be fixed to the inner surface of the member as an outer bracket. in. Like the contact portion, for example, a square member disposed in a transmission portion of a sewing machine is moved in a frictional contact manner along a groove that is configured to guide the movement of the square member. In this example, if the friction surfaces and grooves of the square member are made of a hard porous carbon material, no lubrication is properly achieved. Furthermore, the amount of oil to be added can be reduced by using two types of structures, in which a hard porous carbon material is used as the friction surface of the contact portion of the sewing machine, and a structure in which lubricating oil is added to the contact portion. For example, if the part is made of a hard porous carbon material, in addition, only the friction surface of one of the parts may be made of a hard porous carbon material, or all the surfaces as the friction surface may be made of a hard porous carbon material. ------------- Install -------- Order · -------- Line (Please read the precautions on the back before filling this page)

517121 A7 Printed by the Employees' Cooperative of the Zhichu ST Production Bureau of the Ministry of Economic Affairs. 5. Description of the invention (5) In addition, some of the accessories of the contact part can be made of hard porous carbon material. Further, a member made of a hard porous carbon material may be fixed to a friction surface of a metal fitting as a basic member. In addition, a member made of a hard porous carbon material may be fixed to a member serving as an outer bracket, which is fixed by using an adhesive or a mechanical locking method such as a screw. In addition, a processing method for processing a hard porous carbon material includes the steps of using a molded article made of a mixed material including at least a cellulose-based material and a resin, and burning and carbonizing the molded article. For example, 'the rice bran produced in the process of refining unmilled rice to obtain polished rice, accurately, by removing the oil content in the rice bran, a non-fat loquat system can be obtained as a suitable fiber. Vegetarian based materials. The non-greasy skin is impregnated with resin and then compressed to make a molded article. After that, the molded article is dried to become a dried molded article. The dried molding is exposed to an inert gas, such as nitrogen, and is heat treated and carbonized and burned. It can be made into rice bran ceramic products. In this example, the waste after use will not harm the natural environment. Therefore, excellent environmental adaptability can be obtained. In addition, this material (oil-free skin) can stably maintain a large supply. Consumption of wood can be reduced by using non-greasy shells. As a result, the amount of rosewood in forests in the world can be suppressed. In addition, in the production process of rice bran Taoman products, different resin materials that can be carbonized by heat treatment can be used as the resin required in the process. & Zhang Shuiji's Family Standard (CNS) A4 Regulations ^^ χViewing Public Meal) ----(Please read the precautions on the back before HI this page) Binding: --Line-Fifth, the description of the invention (6 ) More specifically, a thermosetting resin is preferred, such as a phenol resin. For example, hard porous carbon materials made by using the above-mentioned manufacturing methods can be obtained by metal molding, or can be easily obtained through different general-purpose processing procedures, such as extrusion or cutting. Molded products. Therefore, a molded article having a complicated shape can be easily provided, and the manufacturing cost can be reduced. In addition, the hard porous carbon material has a characteristic in that its hardness is adjusted depending on the burning temperature in the step of burning and carbonizing the molded article. Therefore, a desired hardness of the molded article can be obtained. In addition, the hard porous carbon material has a characteristic in that its density can be adjusted because the characteristic of the porous material varies depending on the temperature of the burning. Because: It can obtain the use condition of density matched with PV value. The third aspect of the present invention is directed to the movable device of the sewing machine according to the first aspect of the present invention. At least one of the two parts—the part has a metal ring portion and the other part has a ring shape. In the shaft-shaped portion of the portion, at least one contact surface is made of a hard porous carbon material. According to this configuration, 'the contact surface as the friction surface is made of a hard porous carbon material' and can be obtained in the same manner as the first aspect of the present invention without requiring lubrication.

Shown in the figure. Therefore, the contact portion of the shaft and the glaze bearing μ and ^ glazes can achieve the characteristics of not requiring lubrication. This paper size applies to China National Standard (CNS) A4 (2

X 297 mm) 5 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A: ------------ Description of Invention (7) In this example, 'as a component of the outer and inner cylindrical parts is not It needs to be constituted by one component but may be composed of several components. In addition, 'a member made of a hard porous carbon material is used as the inner cylindrical part', and if it can be fixed to a surface which is a friction surface, it may have any shape 'such as a cylindrical shape or a flat plate shape. A third aspect of the present invention is directed to a movable device of a slitting machine according to the first or second spot of the present invention, in which the contact surface formed of the hard porous carbon material has a large amount of the hard porous carbon material. Stomatal-based recessed parts. According to this configuration, the concave portions on the friction surfaces of the at least two members which cause friction at the same time when they are in contact with each other, cause the abrasion powder generated in the initial abrasion stage to be hidden therein. The abrasion powder hidden in the concave portion reduces the friction coefficient during the contact that generates friction (a characteristic of self-lubrication). As a result, no lubrication is required. In addition, according to the "structure", a large number of recessed portions composed of pores are arranged on a friction surface composed of a hard porous carbon material. Therefore, for example, a recessed portion can be impregnated with a lubricant such as grease. Furthermore, it can enhance the characteristics of wear resistance and resistance to fusion. As shown above, the density (porosity) of the hard porous carbon material varies depending on the manufacturing conditions. Therefore, with the construction of a hard porous carbon material having high porosity, a lubricant such as grease can be impregnated, for example, the material can be impregnated with more lubricant. Therefore, it can further enhance its wear resistance and solvent resistance. In addition, the hard porous carbon material is a so-called porous material. Because this paper size applies the Chinese National Standard (CNS) A4 specification (210 X 297 public love) 10. ^ --- (Please read the precautions on the back before this page) *. --Line-517121 Λ7 Ministry of Economic Affairs Printed by the Consumer Cooperative of the Property Bureau V. Invention Description (8) Therefore, some stomata are present in the material at the same time. Therefore, at the same time, the surface of the hard porous carbon material in this example was scratched and scratched, and new internal pores were exposed to form a large number of concave portions on the surface. Method for accomplishing the invention A sewing machine Xia 0 according to an example of the embodiment of the present invention with Zhao will be described with reference to Figs. 1 and 2 below. -The sewing machine has a conventional oil adding device which is mainly used as a contact portion for adding oil to a sliding material or a rotor for a driving part. Therefore, the description is mainly directed to the contact portion of the transmission part of the sewing machine according to an example. The same structure as in the conventional seam can be applied to the structure of parts other than the traditional part. According to the first example, the friction transmission part of the sewing machine 10 has a shaft capable of performing a sliding action or a rotating action, and a bearing for accommodating the shaft. In addition, the transmission part has an "upper shaft" for completing the rotation along a central axis. The upper metal part ηΑ is used as a bearing for the upper H, and a needle rod crank rod 13 is used for the upper shaft. The turning action is converted into a sliding action in a vertical direction. A balancing member 6 is used to supply a needle thread to the needle 1B. The sliding bearing 15 of the balancing member is used as a shaft 16A disposed in the balancing member 16. Bearings—Needle Correction—The needle bar support frame 18B is arranged in the needle bar 17, and a swing axis is used to complete a swinging movement. A swing platform 19 includes a metal part 19A and a The metal part 19B under the needle bar, the square member 14 is guided along the groove 19C of the swinging flat 19 to complete the sliding action in a vertical direction, and the metal part 1 of the swinging axis (: as the swinging axis m Axis II · I ---- II ^ · 11111111 (Please read the precautions on the back before filling this page)

Please read the precautions on the back of this page before going to this page)-Threads · 517121 V. Description of the invention (9) A series of accessories used as bearings to store a shaft, which is a component that completes the sliding and rotating actions, for example, It is attached to a bearing 100 (annular fitting) shown in Figure 5 (b). More specifically, the bearing 100 having such a structure is equipped with a bush-shaped molded product 102 (inner cylinder) made of a rice bran ceramic product (described above), and is fixedly inserted into an A cylindrical outer cover member (outer cylinder) made of metal is used as an outer bracket of the bearing 100. In addition, the bearing 100 is used for accommodating a shaft (a shaft-shaped accessory is not shown in the figure), and is used to complete the sliding and rotating movement by the inner surface 102 A of the molded product 102 in the shape of a bush. In addition, as shown in Fig. 5A, a large number of air-recessed concave portions 102B are arranged in the rice bran ceramic product, and the concave portions are formed on the inner surface 102A as friction with a side surface of a shaft (not shown) The surface, and the abrasion powder 102c produced at the beginning of the rubbing phase are hidden; in the concave portion 102B. When the shaft (not shown) produces friction% with the inner surface 1028, the abrasion powder 102C acts as a solid lubricant, so it can achieve characteristics that do not require lubrication. The upper shaft front metal portion 11A includes an inner cylindrical portion 11Aa, as shown in Figs. I and 2, and is equipped with a bush made of rice bran ceramic products and fixed into an inner surface of the inner cylindrical portion 11Aa. The front metal part 11A of the upper shaft is a bearing for slidingly and rotatably supporting the upper shaft 丨 丨 to complete the turning action. A needle bar crank weight 11B is fixed to one end of the upper shaft 丨 丨. The needle bar crank weight portion 11B includes a receiving hole 1Ba. Receiving hole 丨 It is able to fix an inclination shaft 12 to fix the needle bar crank weight 11 b and the needle bar. The paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm). Printed by the Consumers 'Cooperative of the Ministry of Intellectual Property Bureau 12 517121 A7 B7 Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (10) The crank lever 13 is engaged. The engaging shaft 12 is provided with a notch 12A and is fixed to the receiving hole 11Ba of the needle bar crank weight portion 11B by a bolt 1 1Bc, and the bolt 11Bc is fixed to the receiving hole 1 1Bb, and the receiving hole 1 1Bb has a thread system Arranged in the needle bar crank weight 11B. Therefore, the needle bar crank weight 11B and the engaging shaft 12 can be rotated integrally. The needle bar crank lever 13 includes a cylindrical portion 13A for slidingly and rotatably supporting a shaft 12 disposed in the engaging shaft 12, and a receiving hole 13B is used to assemble a shaft 15B disposed in a sliding bearing 15 of a balance member. And an inner cylindrical portion 13C for slidingly and rotationally assembling a shaft 18A arranged in the needle bar support frame 18. Assemble a bush made of a rice bran ceramic product and fix it into the inner cylinder parts 13A and 13C. They are used as bearings for the shaft 12B and the shaft 18A to complete the sliding and rotating actions respectively. The sliding bearing 15 of the balance member includes an inner cylindrical portion 15A and a shaft 15B '. The shaft system is fitted into a receiving hole 13B disposed in the needle rod crank lever 丨 3. A shaft bush made of rice bran ceramic products is assembled and fixed into the inner cylinder portion 15A as a bearing for supporting a shaft 16A arranged in the balance member 16 for sliding and rotating support. The needle bar support frame 18 is fixed to the needle bar 17 by tightening a bolt 18C, and the bolts are fixed to the receiving holes 18B disposed in the needle bar support frame 丨 8 and have threads. In addition, the needle bar support frame 18 includes a shaft 18A. The shaft 18A is fitted in an inner cylindrical portion 13c disposed in the needle bar crank lever 13. The structure of the square member 14 is such that one end of the assembled shaft 18A is inserted into the inner cylindrical portion 13C of the needle bar crank rod 13 and fixed into the positive ^ -------- ^ ---- --I-- (Please read the notes on the back before filling this page)

517121 A7 ---------- B7_____ 5. Description of the invention (11) In the receiving hole 14A of the square member 14. In addition, the 'square member 14 is guided along a groove 19C disposed in the swinging platform 19, and can perform a sliding motion along the groove 19c in a vertical direction. Therefore, the needle bar 17 can be moved in the vertical direction in relation to the swinging platform 19. The entire square member 14 is made of rice bran ceramic products, while the two sides and back of the square member 14 are in contact with the groove 19C, and at the same time, friction is caused and slides along the groove 19C. The entire square member 14 is not always composed of rice bran ceramic products, but a member composed of rice bran ceramic products can be fixed to the two sides of the square member 14 and the back surface is in contact with the groove 19c, which is grooved. Friction surface of the groove 19C. The swing platform 19 includes a metal part 19A on the needle bar disposed at the upper end, a metal part i9B on the needle bar disposed on the lower end, and a groove 19c for guiding the V-shaped member 14. In addition, one end portion of the swing shaft 10 is fixed to the swing platform 19 and completes a swing operation with the swing shaft m as a whole. The upper metal part 19A of the needle bar includes an inner cylindrical part 19Aa, the lower metal part 19B of the needle bar includes an inner cylindrical part i9Ba, and a bushing composed of a rice bran ceramic research port is assembled in the inner cylindrical part, i9Ba in. The metal part 19A on the needle bar and the metal part 19B on the needle bar are used as bearings to support the needle bar 17 vertically and slidingly. The needle bar in this configuration is connected to the metal part 19A on the needle bar and the metal part 19B on the needle bar. connection. A member made of rice bran ceramics can be fixed to the contact portion of the groove 19C by the square member 14. ^ — (Please read the phonetic on the back? Matters on this page) Orders • Lines • Printed by the Employees ’Cooperatives of the Ministry of Economic Affairs and the Smart Industry Bureau

517121 A7

Please read the 1th item on the back before filling in this page. Binding printed by the employee's consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. A7 __B7 Five V. Invention description (丨 3) 'You can use a lubricant such as grease to impregnate the inside of the pores. . In this example, 'can enhance the abrasion resistance and anti-glare ability. In addition, the structure of the rice bran ceramic products used here has a large porosity, that is, the low density is impregnated with a lubricant, which can enhance the abrasion resistance and resistance to fusion. Furthermore, the friction coefficient of the bran ceramic products can be set to be from 0.06 to 0.18 depending on the burning temperature in the manufacturing process. In addition, the rice bran ceramic product may have a compressive strength of 50 to 100 MPa depending on the burning temperature in the manufacturing process. Then, the manufacturing method of the sewing machine accessories according to an example is the same as that of the first garment U method, except that the friction surface of the contact part in each element of the transmission part of the sewing machine 10 is made of rice bran ceramic products. Made up. More specifically, for example, a bush made of rice bran ceramic products manufactured by this manufacturing method is assembled and fixed into the inner cylinder parts nAa, 13A, 13C, 15A, 19Aa, 19Ba and the heart. The part of the friction surface, which is used as a bearing for the upper metal part iia by using an adhesive or a mechanical locking method (such as 'thread tightening'), a needle bar crank rod 13, a balance member sliding bearing 15, a swing The platform 19 and the metal part 1C of the swing shaft are used. In addition, for example, the entire square member 14 is made of rice bran ceramics. In this example, a component made of rice bran pottery products can be fixed to the portion used as a friction surface by using an adhesive or a mechanical locking method such as screwing. Then, by using the same method used in traditional techniques, the Chinese paper standard (CNS) A4 specification (2) 0 X 297 public love is applied to the size of the paper.

------- install --- (please read the precautions on the back before this page); line- 16 517121 A7 B7 printed by the 8th Industrial Cooperative Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs V. Description of invention (Μ) Wipe There are elements on the surface with rice bran ceramics to make the sewing machine. According to the above-mentioned example of the specific embodiment of the present invention, the sewing machine 10 is configured as a bearing part in the front metal part ii A and the needle rod crank lever U, and as a friction surface that comes into contact and generates friction at the same time. For example, the square member 14 is made of a rice bran ceramic product having a small coefficient of friction. In addition, a large number of concave portions serving as air holes are arranged on the friction surface. Therefore, the abrasion powder serving as a solid lubricant can be accommodated in the concave portion. Therefore, the amount of wear can be reduced and the amount of heat generated can be reduced. Thus, a sewing machine without lubrication can be obtained. In addition, no lubricant supply is required. Therefore, it is not necessary to add lubricating oil to the oil adding device of the sewing machine, so that the weight of the sewing machine can be reduced. Furthermore, a rice bran ceramic product having a small density is used. Therefore, the weight of the sewing machine can be further reduced. In this specific embodiment, in particular, the entire swing platform 19 is made of rice bran ceramic products. Therefore, the swing shaft metal portion 1 () having the branch swing shaft 1D on which the swing platform 19 is fixed: the applied pv value can be reduced and the degree of wear resistance of the swing shaft metal portion 1 C can be enhanced. In addition, The inertial force applied to the swinging motion of the swinging platform 19 can be reduced. In addition, the needle bar can be precisely swung. Therefore, a good stitching can be formed. Furthermore, no oil adding device is required. Therefore, the number of sewing machine parts can be reduced The manufacturing load of a sewing machine can be reduced and the manufacturing cost can be reduced. Like the specific embodiment of the same change, the present invention can also be applied to a transmission part of a sewing machine 20 having a structure as shown in FIG. 3. The traditional part shown in the figure includes a needle bar crank weight ------------- installation ---- I --- order ------ I-* 5 ^ (Please read the notes on the back before filling this page)

517121 A: V. Description of the invention (15 2) A balance member crank 22, and an engaging shaft 23 for engaging the needle rod crank weight 21, a balance member crank 22, and a crank lever to engage the crank lever 24 to rotate The movement is converted into a vertical movement, a square member 25 is fixed to the crank lever, a needle bar 26 is used to support a needle 29 at the lower end, a needle bar support frame 27 is engaged with the needle bar 26 by the crank rod 24, and A needle fixing device 28 is attached to the lower end of the needle bar 26. When the transmission portion of the sewing machine 20 is actuated, it is disposed in the balance member crank 22-the inner cylindrical portion 22A-the inner surface of the balance member and is disposed in an engagement A side surface of a shaft 23A in the shaft 23 is disposed in an inner cylindrical portion 24B of the crank rod 24 and a side surface of a shaft 23B in the spray shaft ^ is disposed in the crank rod 24 A part of the inner cylindrical part 2 and a side surface of a shaft 2 7 A arranged in a needle bar support frame 7 serve as a contact part of a shaft or a bearing, and the part is brought into contact and friction is generated. Therefore, it is composed of rice bran ceramic products. A bush-shaped member is fixed into the inner surface of the inner cylindrical portions 22A, 24A, and 24B. Therefore, when the driving portion of the sewing machine 20 is actuated, lubrication-free characteristics can be achieved. In addition, the square member 25 and other components The components that are in contact with each other and produce friction, α, rice bran, and ceramic products can be fixed to a part of the friction surface of the square member 25. Furthermore, as shown in FIG. 4, the present invention can Applied to a bearing part 40 of the upper ring device support frame. The upper bearing part of the upper bearing support frame 4 〇 Including a upper ring device transmission χ 297 mm) Order ▲ This paper size applies to China National Standard (CNS) A4 specifications ( 2] ^ 18

5. Description of the invention (16) The shaft 42 is used to drive a winding ring device, and a winding ring guide metal portion 41 is used to slide and rotate to support the winding ring device transmission shaft 42. One side surface of the driving shaft 42 of the upper-line mounting device is used to complete a sliding action and a rotating action, and it is in contact with the inner surface 41a of the guiding metal portion 41 of the upper-line ring device while generating friction. Therefore, a bush-shaped member 41A made of rice bran ceramics is assembled and fixed into the inner surface of the upper-line guide device 41. Therefore, a characteristic that does not require lubrication can be achieved. Further, for example, the upper loop device guide metal portion 41 is rotatably supported on an upper loop device guide support member (not shown). The upper ring device guide side surface 41a of one of the guide metal parts and the upper ring device guide support member (not shown) serve as mutually contacting portions while generating friction. Therefore, the shape of the member made of the rice bran ceramic product is fixed in cooperation with the outer peripheral surface of the guide metal portion 41 of the upper ring device. Since the inner surface 41Aa and the side surface 41a serve as friction surfaces, the entire upper ring device guide metal portion 4 is made of rice bran ceramic products. For example, as shown in FIG. 5 (b), a fitting (bearing) of a contact portion has a search structure 'where a member as an outer bracket can be made of a material different from a hard porous carbon material, And a member made of a hard porous carbon material (molded article 102) can be fixed to a part of the friction surface of the member as an outer support. In this example, if the material used is different from the hard porous carbon material is a metal material, for example, parts that are in contact with each other and produce friction can be given its mechanical strength and this paper size applies the Chinese National Standard (CNS ) A4 size (210 x 297 mm) ------------- install -------- order --------- line (please read the note on the back first) (Please fill in this page again for the matters)) Employees' Cooperative Cooperative of the Ministry of Economic Affairs, Smart Industry and Production Bureau, π 19 Μ7121

5. Description of the invention (I7) Durability. Equipment --- (Please read the precautions on the back first and then on this page)-It is obvious that ‘hard porous carbon material can also be applied to the accessories of sewing machines other than the specific embodiment described above. Clear results According to the first aspect of the present invention, a part of the friction surface is composed of a hard porous carbon material having a small coefficient of friction. Therefore, the contact portion of the sewing machine can achieve a characteristic that does not require lubrication. In addition, it is not necessary to provide a means for adding a lubricating oil, etc., to the contact portion. As a result, weight loss can be reduced. Furthermore, for example, the density of a hard porous carbon material is smaller than that of a metal material. Therefore, the weight can be further reduced. In addition, there is no need for an oil adding device. Therefore, the sewing machine can reduce some accessories, so the manufacturing cost of the sewing machine can be reduced and the manufacturing cost can be reduced. .Line-Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. According to the second aspect of the present invention, the shaft-shaped portion completes the turning movement in the circumferential direction along the inner surface of the annular portion, or along the inner surface at— The sliding action in the axial direction 'and the friction surface is made of a hard porous carbon material. Therefore, in the same manner as in the first aspect of the present invention, the shaft and bearing of the transmission portion constituted by the household weight can achieve characteristics that do not require lubrication. According to the third aspect of the present invention, 'the abrasion powder produced in the initial abrasion stage' is contained in a concave portion disposed in the friction surface. The abrasion pad has the characteristic of self-lake slipping, which reduces the friction coefficient when it comes into contact with friction at the same time. Therefore, characteristics that do not require lubrication can be achieved. General description of the Phoenix style This paper standard is applicable to the Chinese National Standard (CNS) A4 specification (210 ---- 517121) V. Description of the invention (18 Offices "is a perspective view of a knife solution, showing a tool according to the invention Receiving = Example-Example '-The transmission part of the sewing machine, Figure 2 is a side view, which shows the transmission part of the sewing machine 10 according to this example, and Figure 3 is an exploded perspective view , Which shows the transmission part of the seam cutting machine 20 according to a modified example. The fourth picture is a _ job map, which shows the upper ring support device bearing part as the contact part of the machine, and the fifth picture is This is a sectional view showing a bearing to which a bushing made of rice bran talman products is fixed to the inner surface, and the view typically shows a section of rice bran ceramic products. 517121 Bureau of Intellectual Property, Ministry of Economic Affairs Printing of clothing by employee consumer cooperatives V. Invention description (I9) A7 B7

Component reference table 1A ... Needle fixing device 1AA ... Shaft 1AB ... Storage 孑 L 1AC ... Screw hole 1B ... Needle 1C ... Metal part 1CA of swing shaft ... Inner cylinder part 1D ... Swing shaft 10 ... Sewing machine 11 ... Upper shaft 11A ... Upper shaft front metal part 1 lAa ... inner cylinder part 11B ... needle bar crank weight part 1 IBa ... storage hole 11B c ... screw inspection 11Bb ... storage hole 12 ... coupling shaft 12 A ... slot 12B ... Shaft 13 ... Needle crank lever 13A ... Cylinder part 13B ... Receiving hole UC ... Inner circular cymbal part 14 ... Square member 14A ... Receiving dagger 15 ... Balance member sliding bearing 15A ... Inner cylindrical part 15B ..... Shaft 16 ... Balance member 16A ..... Shaft 17 ... Needle bar 17A ... Receiving dagger 1 8 ... Needle bar support stand 18A ... Shaft 18B ... Needle bar support 1 8C ... Screw inspection 19 ... Swing platform 19A ... metal part on the needle bar 19Aa ... inner cylinder part 19B ... metal part under the needle bar 19Ba ... inner cylinder part 19C ... groove 20 ... sewing machine 21 ... needle bar crank counterweight part This paper size applies to China National Standard (CNS) A4 specification (210 x 297 mm) 22 (Please read the note on the back first ϋ ϋ i I · n 1 Notes on this page) • Line. 517121 A7 _B7 • V. Description of Invention (20)

Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs 22 ... Balance member crank 40 ... Upper ring device support frame shaft 22A ... Inner cylinder portion bearing portion 23 ... Ming shaft 41 ... Upper ring device guide metal 23 A ... Shaft portion 23B ... Shaft 41A ... Bush-shaped member 24 ... Crank lever 41 Aa ... Inner surface 24A ... Inner cylinder portion 41 a ... Inner surface 24B ... Inner cylinder portion 42 ... Upper ring drive shaft 25 ... Square member 100 ... Bearing 2 ... Needle rod 101 ... Cover portion (outer cylinder portion) 27 ... Needle rod support frame 102 ... Molded product (inner cylinder portion) 27 A ... Shaft 102A ... Inner surface of molded product 28 ... Needle fixing device 102B ... Recessed part 29 ... Needle 102C ... Abrasion powder (please read the precautions on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 (210 X 297 mm) 23

Claims (1)

517121, patent application scope 1 ·-A kind of movable setting for sewing machines, in which two parts that are in contact with each other complete a sliding action or a rotating action, wherein at least one contact part of the accessory is a Made of hard porous carbon material. 2. The movable device for a sewing machine according to the scope of the patent application, wherein at least one of the two parts has a metal ring portion, and the other part has a shaft shape portion that can be assembled in the ring portion. At least one contact portion is made of a hard porous carbon material. 3. The movable device for a sewing machine according to item 1 or 2 of the scope of patent application, wherein the contact portion formed by the hard porous carbon material has a large number of concave portions based on the pores of the hard porous carbon material. 0 ---., 0 > (Please read the notes on the back first and then on this page) T · 40 • Line-Printed on moderate paper sheets (CN Standard {心 国 国) Centimeter 97 2 X 10 2 / IV 24