JPH06365U - Bobbin core - Google Patents

Abstract

(57) [Summary] [Purpose] The bobbin winding work of the sewing machine can be replaced easily and efficiently to prevent various troubles at the beginning of bobbin winding and when the consumption is completed. [Structure] A circular pedestal is fitted into and attached to the lower thread receiver of an existing lower thread winding core rod of a sewing machine, and a rubber slip preventive plate containing short fibers is placed on the circular pedestal, and the lower thread is wound on the lower thread winding hub. A bobbin winding core rod in which a bobbin thread can be wound by forming a through hole, passing a final end of the bobbin thread through the hole, and sandwiching the bobbin thread between a slip preventive plate and a bobbin winding hub to hold the bobbin thread under pressure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lower thread winding core rod for attaching a lower thread winding of a sewing machine.

[0002]

[Prior art]

 Conventionally, in a sewing machine, when the upper thread is replaced, it is necessary to replace it with a bobbin thread winding in which a lower thread of the same color as the upper thread is wound. Further, even when the upper thread is not replaced, it is necessary to prepare the next lower thread before the lower thread runs out. In high-speed work using an industrial lockstitch sewing machine and the like, the bobbin thread is consumed due to continuous operation for only about 5 minutes. Therefore, in such an industrial sewing machine, the remaining amount of the bobbin thread wound around the bobbin thread is detected without stopping the operation of the sewing machine, and the bobbin thread winding is automatically performed when the bobbin thread is consumed. Some sewing machines have a built-in bobbin winding device that enables replacement. However, such a sewing machine is expensive in price, and apart from a major sewing factory, it is difficult to equip it with a small or medium-sized factory, a factory with a few people, or an inside job. In general household sewing machines, it can be said that there is no sewing machine equipped with such equipment. For ordinary industrial sewing machines and general household sewing machines, the bobbin thread is wound around the bobbin winding that is interlocked with the sewing machine by some method during the operation of the sewing machine, and the next bobbin thread can be prepared. ing. The bobbin thread, which is interlocked with the operation of the sewing machine, has a smooth outer surface from left to right and from right to left on a regular basis. Is done by.

[0003]

[Problems to be solved by the device]

 As described in the prior art, the first step of winding the bobbin thread around the bobbin thread is performed manually, but if the bobbin thread is not wound properly at this time, the winding is completed. It often happened that the bobbin thread that was supposed to be wound was not wound, and the bobbin thread was not prepared for the required cage. In order to prevent such a state, first, the final end of the lower thread is wound 3 to 4 times in a direction opposite to the direction of rotation of the bobbin winding, so as not to loosen further and 3 to 4 times in the opposite direction. They were wound, tied at that part, or stuck with a rubber band or cellophane tape. However, these attempts had to be carried out each time, which required a lot of time and effort to set them, and required more time than required, resulting in a great decrease in work efficiency. Further, in this case, the lower end lower thread cannot be unraveled and the upper thread and the lower thread are not evenly tightened, or the needle stitches fly. In rare cases, there were also problems such as broken needles and damaged pattern gauges. The present invention has been made to solve these drawbacks.

[0004]

[Means for solving the problem]

 According to the present invention, a circular pedestal (3) is fitted into and attached to a lower thread winding receiver (2) provided on an existing lower thread winding core rod (1) of a sewing machine, and a short fiber is placed on the circular pedestal (3). A lower thread winding core rod (5) fitted with a circular rubber anti-slip plate (4) mixed with.

[0005]

[Action]

 Pass the lower thread (14) through the hole (11) of the lower thread winding (10), insert the lower thread winding (10) into the lower thread winding core rod (5), press-contact it with the antislip plate (4), and attach the lower thread (14). By pinching and holding the final end (12) between the hub (13) of the bobbin winder (10) and the anti-slip plate (4), the winding start of the bobbin thread (14) is ensured and at the same time the bobbin thread (14) When the consumption of 14) is completed, the bobbin thread (14) comes off smoothly from the bobbin winding (10).

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, it is necessary to manufacture the slip prevention plate (4) used for the bobbin core rod (5) of the present invention. The anti-slip plate (4) itself uses the rubber sheet containing short fibers produced for the footwear sole described in Japanese Patent Application No. 4-20891. The rubber sheet containing short fibers is made by mixing 50 parts by weight of short fibers having a diameter of 9 mm and a length of 1.5 mm with 100 parts by weight of rubber, and rolling an unvulcanized rubber sheet and a general rubber sheet. Press vulcanize to give a herringbone or striped pattern. In this way, the rubber sheet A (6) and the rubber portion B (7) are alternately arranged in a herringbone or striped pattern to obtain a herringbone anti-slip sheet (8) and a striped anti-slip sheet (9). (See FIG. 4) The anti-slip sheet is sliced to a predetermined thickness. In this embodiment, the thickness is 3 mm. This sheet was cut into a circular shape having a diameter of 20 mm, and a fitting hole for fitting into the existing bobbin winding core rod (1) (see FIG. 2) was further provided to manufacture a slip prevention plate (4). On the other hand, a circular pedestal (3) on which the slip prevention plate (4) is placed is manufactured. The circular pedestal (3) has a diameter slightly larger than that of the anti-slip plate (4) and is made of a synthetic resin plate with a thickness of 2 mm. The circular pedestal (3) and the anti-slip plate (4) thus manufactured are fitted into the existing bobbin core rod (1) to complete the bobbin core rod (5) of the present invention. (See FIG. 1) In another step, a hole (11) for passing the final end (12) of the lower thread (14) is opened in the lower thread winding (10). When winding the bobbin thread (14), as shown in FIG. 3, the final end (12) of the bobbin thread (14) is passed through the hole (11) of the bobbin thread winding (10), and the bobbin thread core rod of the present invention is provided. Insert the bobbin winder (10) into the (5) and insert the final end (12) of the bobbin thread (14) between the hub (13) of the bobbin winder (10) and the antiskid plate (4). The lower end (12) of the lower thread (14) is held by pressing. Then, the bobbin thread (14) is wound continuously with the operation of the sewing machine.

[0007]

【effect】

 The effect of such a device is that the bobbin winding operation by hand is extremely easy and can be performed in a short time, the work efficiency is remarkably improved, and the operation rate of the sewing machine can be remarkably increased. . Further, it is possible to prevent a mistake such that the bobbin thread is not wound due to a defective winding of the first bobbin thread. Since the final end of the bobbin thread is sandwiched between the hub of the bobbin thread and the anti-slip plate and held in pressure contact, it is first wound 3 to 4 times in the direction opposite to the direction of rotation of the bobbin thread, and then loosened. It is not necessary to wind it 3 to 4 times or tie a bobbin thread to prevent the occurrence of the problem, and to fix the wound part with a rubber band or cellophane tape. Further, by winding the lower thread according to the present invention, the final end of the lower thread cannot be unraveled, and the tightening of the upper thread and the lower thread does not become uneven, and there is no problem that the stitches fly. In rare cases, the needle was broken or the gauge of the pattern seamer was damaged.However, because the pressure contact method causes the final end of the bobbin thread to come off smoothly from the bobbin thread winding at the completion of bobbin thread consumption, these are also prevented. It can be stopped.

[Brief description of drawings]

FIG. 1 is a perspective view of a lower thread winding core rod of the present invention.

FIG. 2 is a perspective view of a conventional bobbin winding core rod.

FIG. 3 is a perspective view of the bobbin thread passed through a bobbin winding hole, inserted into a bobbin winding core rod, and pressed.

FIG. 4 (a) is a plan view of a herringbone anti-slip sheet. (B) A plan view of the striped anti-slip sheet.

[Explanation of symbols]

 1 Existing bobbin winding core rod 2 Bobbin winding receiver 3 Circular pedestal 4 Anti-slip plate 5 Bobbin winding core rod 6 Rubber part A 7 Rubber part B 8 Sugiya-like anti-slip sheet 9 Striped anti-slip sheet 10 bobbin winding 11 hole 12 bobbin final End 13 Hub 14 Lower thread

Claims (1)

[Scope of utility model registration request] 1. A circular pedestal (3) is fitted into and attached to a lower thread winding receiver (2) provided on an existing lower thread winding core rod (1) of a sewing machine, and a short piece is placed on the circular pedestal (3). A bobbin winding core rod (5) fitted with a circular rubber anti-slip plate (4) mixed with fibers.