KR950025132A - Rotary drum and sewing method - Google Patents

Abstract

In rotary hook assemblies (101) and oscillating shuttle hook assemblies (321), a bearing rib (108,325) on a bobbin case basket (106, 311) or at least its surface layer (217, 324) is composed of a synthetic resin such as a liquid crystal polymer, which has such properties that the amount of the rotating frictional force of the slide contact portion, between the surface layer (217, 324) of the bearing rib (108, 325) and the inside circumference layer (326) of the groove shaped bearing raceway (128, 322) where the bearing rib (108, 325) is fitted, is lower in cases without industrial sewing machine oil than in other cases with the industrial sewing machine oil. By this construction, the hook assembly (101, 321) which has the good durability of the rotating portion without any hook lubrication is realized. Accordingly, the oil stains of threads and sewing materials by hook lubricant is disappeared and the sewing quality enhances. <IMAGE>

Description

Rotary drum and sewing method

Since this is an open matter, no full text was included.

1 is a perspective view of a vertical turning book 101 of one embodiment of the present invention,

2 is a cross-sectional view showing the overall configuration of the vertical turning drum 101;

3 is an exploded perspective view of a fraudulent vertical all-rotating book 101.

4 is a plan view seen from above in FIG. 2 of the inner drum 106,

FIG. 5 is a rear view of the inner drum 106 as viewed from the right side in FIG.

Claims (24)

At least a part of the surface layer of the track of the inner drum of the front drum is not required to intervene the industrial sewing oil when the torque required for rotational drive of the outer shaft drum when the industrial sewing oil is interposed between the inner peripheral surface of the outer groove of the outer drum. The inner drum of the front rotary drum, characterized in that composed of a synthetic resin larger than the torque of. The inner drum of the front rotating drum according to claim 1, wherein the synthetic resin is a liquid crystal polymer. The inner drum of the rotating drum according to claim 1, wherein the synthetic resin is an aromatic polyimide resin. The inner drum of the all-rotating drum according to claim 1, wherein the track is formed in an endless annular shape and is fitted to and fixed to the outer circumference of the tubular portion of the inner drum body. 2. A track according to claim 1, wherein a track is formed by integrally molding a covering member made of synthetic resin from the thread separating portion of the track portion to the thread separating portion of the inner drum main body made of metal integrally. The inner drum of the all-rotating drum, wherein the metal track portion is exposed from the covering member in the rotational direction upstream layer of the outer drum. The inner drum of the front rotating drum according to claim 1, wherein the synthetic resin comprises a powder made of metal powder, ceramic powder or other hard and wear resistant material. At least a part of the surface layer of the outer groove of the outer drum of the all-turn drum is such that the torque required to drive the rotation of the outer drum when the industrial sewing machine is interposed between the inner peripheral surface of the track of the inner drum and the industrial sewing machine does not interpose the industrial sewing machine oil. The inner drum of the all-round drum, comprising a synthetic resin that is larger than the torque at that time. 8. The inner drum of the rotating drum according to claim 7, wherein the synthetic resin is a liquid crystal polymer. 8. The inner drum of a sewing machine according to claim 7, wherein said synthetic resin is an aromatic polyimide resin. An all-in-one drum in which the track of the inner drum is fitted into the outer groove of the outer drum and the outer drum is rotationally driven around its rotation axis in a state in which rotation of the inner drum is prevented, wherein the outer drum is an outer side in which a groove is formed on the inner circumferential surface thereof. And a sliding member fixed in the groove of the outer body and having the bin groove, wherein the sliding member is selected from the group of liquid crystal polymer and aromatic polyimide resin. In the sewing method using the full-turn drum, the inner north of the full-turn drum is the outer drum when at least a part of the surface layer of the track of the inner drum is interposed with the inner sewing surface of the outer groove of the outer drum. A sewing method characterized in that sewing is performed without interposing industrial sewing oil between the surface layer of the track of the inner side of the torque and the inner circumferential surface of the outer groove of the outer groove when the torque required for rotational driving does not interpose the industrial sewing oil. In the sewing method using the full-turn drum, the torque required for the rotational drive of the outer drum when at least a part of the surface layer of the outer groove of the outer drum of the full-turn drum interposes the industrial sewing oil between the inner circumferential surfaces of the inner drum track. A method of sewing, comprising: a synthetic resin that is larger than a torque when no industrial sewing oil is interposed therebetween, and the industrial sewing oil not interposed between the surface layer of the inner north track and the inner peripheral surface of the outer groove of the outer north. At least a part of the surface layer of the orbit in the north north of the semi-rotating north is when the torque required for rotational driving of the north north when interposing the industrial sewing oil between the inner circumferential surface of the large north latitude groove does not interpose the industrial sewing oil. The sewing method characterized by comprising a synthetic resin larger than the torque of. At least a part of the surface layer of the bin groove of the north drum of the anti-rotation drum is when the torque required for rotational driving of the outside drum when the industrial sewing machine is interposed between the inner peripheral surface of the bin groove of the drum is not interposed between the industrial sewing oil. A large drum of a semi-rotating drum, characterized by a synthetic resin that is larger than the torque. In the sewing method using the semi-rotating drum, the intermediate drum of the semi-rotating drum is a rotational drive of the outer drum when at least a part of the surface layer of the intermediate orbit interposes industrial sewing machine oil between the inner circumferential surface of the bin groove of the large drum. The torque required is made of synthetic resin which is larger than the torque when no industrial sewing oil is interposed, and sewing is performed without interposing the industrial sewing oil between the surface layer of the track of the middle drum and the inner circumferential surface of the groove of the large drum. Sewing method characterized in that. In the sewing method using the half-turn drum, the north drum of the half-turn drum is the rotation of the outer drum when at least a part of the surface layer of the bin groove of the north drum interposes industrial sewing machine oil between the inner peripheral surface of the track of the middle drum. The torque required for driving is made of synthetic resin which is larger than the torque when the industrial sewing oil is not interposed therebetween, and the industrial sewing oil is not interposed between the surface layer of the track of the middle drum and the inner circumferential surface of the bin groove of the large drum. How to sew. The bobbin case basket is housed with a closed bobbin, and the outer periphery has a trajectory extending in the circumferential direction, and the bobbin case basket is enclosed. In a sewing machine book comprising a loop taker in which a lost groove is formed to support a bobbin case basket, at least one of the surface layer of the track or at least one of the layers of the inner circumferential surface of the track groove is between the surface layer and the layer of the inner circumferential surface. A drum for a sewing machine, characterized in that the torque required for rotational driving of the outer drum when the industrial sewing oil is interposed therebetween is made of a synthetic resin that is larger than the torque when the industrial sewing oil is not interposed therebetween. 18. The sewing machine drum according to claim 17, wherein the drum of the sewing machine is a forward rotation drum, and Lufteiki is a rotary rooftaker. 18. The sewing machine drum according to claim 17, wherein the drum of the sewing machine is a half-turn drum, and the looptaker swings. 18. The sewing machine book according to claim 17, wherein the synthetic resin is a liquid crystal polymer. 18. The sewing machine drum according to claim 17, wherein the synthetic resin is an aromatic polyamide resin. The bobbin case basket according to claim 17, wherein the bobbin case basket includes a tubular portion for accommodating the bobbin, and the trajectory is formed in an endless annular shape, and is fixed to the outer periphery of the normal portion. In a sewing method using an unknown drum, the drum of the sewing machine includes a bobbin case biscuit and a bobbin case basket, each of which includes a bobbin wound around a bobbin and a circumferentially extending outer periphery, and a bobbin case basket. A rotatable groove which rotates or oscillates and extends in the circumferential direction in the circumferential direction to form a track and supports the bobbin case basket, wherein at least one of the surface layers of the track or the layer of the inner circumferential surface of the track groove And the torque required for the rotational drive of the roof tape when the industrial sewing oil is interposed between the surface layer and the inner peripheral surface layer is made of synthetic resin which is larger than the torque when the industrial sewing oil is not interposed. Sewing is performed between the surface layer and the layer of the inner circumferential surface of the bin groove without interposing the industrial sewing oil. Sewing how to use the sewing machine to the north of a gong. ※ Note: The disclosure is based on the initial application.