WO2016017935A1

WO2016017935A1 - Crank rod and method for variably converting and selecting model of sewing machine

Info

Publication number: WO2016017935A1
Application number: PCT/KR2015/006602
Authority: WO
Inventors: 김광연
Original assignee: 김광연
Priority date: 2014-07-29
Filing date: 2015-06-26
Publication date: 2016-02-04
Also published as: CN106471171A; KR101495282B1

Abstract

Disclosed are a crank rod and a method for changing and selecting the model of a sewing machine by adjusting the vertical movement trajectory of a needlebar on the sewing machine. The present invention comprises the steps of: identifying the model of a sewing machine; removing a crank rod applied to the model of sewing machine that has been identified in the previous step, and selecting a crank rod that is longer or shorter in length compared to the removed crank rod; installing the crank rod selected in the previous step on an upper shaft of a sewing machine arm; and guiding adjustment of the vertical movement trajectory of the needlebar through the crank rod installed on the upper shaft in the previous step, thereby guiding a change of sewing machine model and providing a selection of models in a single sewing machine.

Description

Variable conversion and selection method of sewing machine and crank rod

The present invention relates to a variable type switching method and a model selection method of the sewing machine and a crank rod for variable sewing machine type in more detail by adjusting the length of the crank rod to be installed on the arm upper shaft of the sewing machine variable conversion of the sewing machine type and to one sewing machine The present invention relates to a model variable conversion and selection method of a sewing machine for giving a model selectivity, and a crank rod.

The rotating shaft of the sewing machine is divided into an upper shaft and a lower shaft. The upper shaft drives a needle bar mechanism and a thread take-up mechanism through a counterweight that rotates by the rotation of the shaft.

In order to increase the vertical motion of the needle bar, the connection position of the needle bar crank rod with respect to the counterweight should be set to a position where the amount of eccentricity from the center of rotation of the counterweight is large. If the eccentricity is large, since the movement trajectories of the needle bar crank rod and the thread take-up crank overlap and contact each other when the sewing machine is driven, a problem arises in that the vertical motion of the needle bar cannot be increased. In particular, in the thick sewing machine for sewing materials, it is desirable to increase the amount of time that the needle is pulled out of the fabric as long as possible in order to move the sewing material without difficulty. do.

In addition, in order to cope with the high speed of the sewing machine, a large diameter bearing can be used when connecting between rotating members, but a large diameter bearing can be used for connecting the sewing machine frame side of the take-up crank and the crank shaft of the needle bar crank rod. Since the diameter itself of each connecting portion is enlarged, both connecting portions are in contact with each other, making it impossible to use, and there is a problem in that the sewing machine can not be speeded up. Although the method of separating the position of the thread take-up support shaft in the radial direction from the upper shaft can also be considered, in this case, since the thread take-up support shaft is spaced apart, the rising speed of the thread take-up slows down and the thread tightening becomes worse.

The length of the crank rod in the thick sewing machine (also known as the '415' model) for sewing thick sewing materials such as leather ('413' model) for sewing sewing materials such as cloth with relatively thin thickness. It is set long compared with the length of the crank rod). That is, the length of the crank rods used in the sewing machine for thick / museum are each different. The thick sewing machine is close to an industrial sewing machine, and the thin sewing machine is close to a domestic sewing machine, but the driving principle and operation of the mechanism are almost identical and there is no difference.

Looking at such a conventional sewing machine drive mechanism, the length of the crank rod applied to the sewing machine for sewing materials, such as thick leather and the sewing machine for sewing a relatively thin thickness of heaven and the like, the length of each is different. .

In case of the sewing machine for thick goods, the length of the crank rod is made long enough to secure the lifting trajectory of the needle bar so that the lifting trajectory of the needle bar can be increased in order to secure the time that the needle has escaped from the sewing as long as possible. , In the case of a sewing machine for museums, the length of the crank rod is manufactured and mounted in a shorter length than the sewing machine for thick materials.

Accordingly, when using the sewing machine, depending on the type of sewing material, either one of the thickening material or the revolving mold for the museum may be selected and used. In other words, when sewing a leather or thick thickness of the sewing material is used for sewing materials, when sewing a thin stream of cloth, the inconvenience of having to use a sewing machine for the museum.

At home, people usually buy and use a sewing machine for the museum, but it is almost impossible to sew thick or tough sewing materials such as leather, and conversely, when using a sewing machine for a sewing machine such as leather, the speed and speed of the sewing machine I could not expect the benefits.

Thus, the present inventors can expect the advantages that can be obtained in the sewing machine for sewing on the sewing machine for the thick to eliminate the inconvenience of using the model of the sewing machine according to the type of sewing material to induce the variable conversion and one sewing machine for the thick We propose a new method to provide model selectivity through

The present invention was devised to solve the problems of the prior art, an object of the present invention, by adjusting the needle bar elevating trajectory of the sewing machine according to the kind of sewing material and sewing machine for the selective use It is to solve the inconvenience.

Another object of the present invention is to adjust the needle bar elevating trajectory of the sewing machine of the determined model to increase or decrease closer to the other sewing machine model to be able to use the sewing machine of the already determined model as a sewing machine of another model.

Model variable switching method of the sewing machine according to an embodiment of the present invention, confirming the type of the sewing machine; Removing the crank rod applied to the sewing machine model identified through the step and selecting a crank rod longer or shorter than the length of the corresponding crank rod; And mounting the selected crank rod to the sewing machine arm upper shaft through the above steps.

Model variable conversion method of the sewing machine according to an embodiment of the present invention, characterized in that the sewing machine model to be checked in the model confirmation step of the sewing machine is one of the sewing machine for sewing materials or for the museum.

Another feature of the invention, the step of selecting a crank rod relatively short in length compared to the length of the crank rod installed on the arm upper shaft of the sewing machine for thick goods; Mounting the selected crank rod through the arm on the arm upper shaft of the sewing machine; And checking the elevating trajectory of the needle bar by the crank rod mounted to the arm upper shaft through the above steps to correct or adjust the movement stroke of the peripheral parts.

Another feature of the invention, the step of selecting a crank rod relatively short in length compared to the length of the crank rod installed on the arm upper shaft of the sewing machine for thick goods; Mounting the selected crank rod through the arm on the arm upper shaft of the sewing machine; Selecting a thread take-up that is relatively short in length compared to the protruding length of the thread take-up installed in the frame of the sewing machine for mounting, and mounting the thread take-up crank; And checking the lifting trajectory of the needle bar by the crank rod mounted on the upper shaft through the step to adjust the stroke movement trajectory of the thread take-up.

In the variable variable method of the sewing machine according to an embodiment of the present invention, the total length of the crank rod to replace the crank rod of the sewing machine for thick goods ranges from 1/2 to 2/3 of the total length of the crank rod of the sewing machine for thick goods. Characterized by the variable switching method of the sewing machine by adjusting the lifting trajectory of the needle bar according to the standard.

Model variable switching method of the sewing machine according to an embodiment of the present invention, the crank rod selected in the crank rod selection step is characterized in that the machine variable variable switching method by adjusting the lifting trajectory of the needle bar using the crank rod used in the sewing machine for museums It is done.

Model variable switching method of the sewing machine according to an embodiment of the present invention, in the step of adjusting and adjusting the stroke of the peripheral parts of the sewing machine variable conversion of the sewing machine to correct the stroke or adjust the stroke by adjusting the length of the thread take-up Method.

In the variable variable method of the sewing machine according to an embodiment of the present invention, the total length of the thread take-up used in the stroke correction and adjustment step of the peripheral parts is 1/2 to 2/3 of the total length of the thread take-up of the sewing machine for water. It features a variable switching method of the type of sewing machine tailored based on the length range.

In the variable variable method of the sewing machine according to the embodiment of the present invention, the total length of the thread take-up used in the step of selecting the thread take-up and mounting on the thread take-up crank is 1/2 to 2 with respect to the total length of the sewing machine thread take-up for after-water. It features a variable switching method of the type of sewing machine to match the length range of / 3.

Model variable switching method of the sewing machine according to an embodiment of the present invention, the thread take-up used in the step of adjusting the stroke movement trajectory of the thread take-up is characterized in that the variable variable method of the sewing machine using the thread take-up used in the sewing machine for museum .

In still another aspect of the present invention, in the method of selecting a machine for selecting any one of a sewing machine for sewing materials and a sewing machine for sewing materials, the length is relatively short compared to the length of the crank rod installed on the upper arm of the sewing machine for sewing materials. Mounting the crank rod on the arm upper shaft of the sewing machine for the water, characterized in that the model selection method of the sewing machine to selectively use the sewing machine for the water to change the model to the sewing machine for the museum.

Another feature of the invention, the crank rod having a relatively short length compared to the total length of the crank rod is installed on the upper axis of the sewing machine angle arm for thick goods; Variable length of the crank rod, which is shorter than the crank rod of the thick sewing machine, adjusts the needle bar elevating trajectory of the sewing machine for the thick sewing machine based on the lifting trajectory of the sewing machine for the museum to vary the sewing machine for the sewing machine for the museum. Crank rod; characterized by.

In the sewing machine type variable crank rod according to an embodiment of the present invention, the overall length of the crank rod replacing the sewing machine crank rod for thick goods is based on the length range of 1/2 to 2/3 with respect to the total length of the crank rod of the sewing machine for thick goods. Tailoring sewing machine model variable crank rod; characterized by.

Sewing machine type variable crank rod according to an embodiment of the present invention, the crank rod to replace the crank rod for sewing materials is a crank rod used in the sewing machine for museums; characterized by the type variable crank rod of the sewing machine.

Model variable switching method, model selection method and model variable crank rod of the sewing machine according to an embodiment of the present invention, by adjusting the length of the crank rod of the sewing machine to change the lifting trajectory of the needle bar. Through this, the model of the sewing machine is variable or provides model selectivity. Then, by adjusting the movement stroke trajectory of the thread take-up that follows the needle bar lifting trajectory of the sewing machine, the sewing machine for water can be used as a sewing machine for museums, and the sewing machine for sewing machines can also be used for museums. In addition, there is convenience of use for the sewing machine user.

1 is a side view of the needle bar and the take-up mechanism inside the sewing machine arm.

Figure 2 is a cross-sectional view showing a front portion of the sewing machine needle bar and thread take-up mechanism.

Figure 3 is a perspective view of the upper shaft and the needle bar and the take-up mechanism portion of the sewing machine.

Figure 4 is a side view of the needle bar and thread take-up mechanism inside the sewing machine arm adjusting the lifting trajectory of the needle bar according to an embodiment of the present invention.

Figure 5 is a cross-sectional view showing a part of the front of the needle bar and thread take-up mechanism inside the sewing machine arm adjusting the lifting trajectory of the needle bar according to an embodiment of the present invention.

Figure 6 is a comparative reference of the crank rod according to an embodiment of the present invention, (a) is a crank rod of a conventional sewing machine for thick goods, (b) is a crank rod according to the present invention.

Figure 7 is a comparative reference of the thread take-up according to an embodiment of the present invention, (a) is a thread take-up and crank of the conventional sewing machine for thick, (b) the take-up and crank according to the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiment of the present invention is a needle bar as an invention related to the variable switching method of the sewing machine by adjusting the lifting trajectory of the needle bar of the sewing machine, the method of selecting the sewing machine by adjusting the lifting trajectory of the needle bar, and a crank rod for changing the sewing machine type By adjusting the length of the crank rod to determine the lifting trajectory to induce a variable for the model or specification of a given sewing machine, thereby providing a model selectivity that can obtain the characteristics appearing in another machine in one sewing machine. This will be described in detail through the sewing machine driving mechanism general of FIGS. 1 to 3. For reference, the general drive mechanism of the sewing machine is a type of sewing machine, that is, a sewing machine for thick / museum, the driving principle is the same or similar to each other. Therefore, the meaning of the sewing machine in the description of the present invention does not distinguish separately for sewing materials for the thick / museum. The necessary part describes a model limitedly.

1 is a side view of a needle bar and a thread take-up mechanism inside a sewing machine arm. Figure 2 is a cross-sectional view showing a part of the front of the sewing machine needle bar and thread take-up mechanism.

1 and 2, the left A direction is a face plate direction that is the tip of the sewing machine arm, and the right B direction is a pulley direction in which a pulley (not shown) is disposed. Inside the arm 111 of the sewing machine 100, the upper shaft 112 extending along the longitudinal direction of the arm 111 is rotatably supported by the sewing machine frame 113 of the sewing machine arm 111. The upper shaft 112 is rotated by the motor and the counterweight 114 is fixed to the end of the face plate A direction, and the counterweight 114 rotates together with the upper shaft 112. The counterweight 114 is formed with an eccentric hole which is eccentric with respect to the rotation center. The crank shaft 115 has a crank shape in which two shaft portions parallel to the upper shaft 112 protrude in the pulley direction and the face plate direction, respectively. The distal end portion of the shaft portion 116 protruding in the B direction with the pulley is fitted into the eccentric hole 117 and fixed. The shaft portion 118 on the face plate A direction side pivotally supports the upper end portion of the crank rod 120 of the needle bar 119. The amount of eccentricity from the center of rotation of the counterweight 114 is arranged such that the shaft portion 118 is larger than the shaft portion 116. The lower end of the needle bar crank rod 120 pivotally supports the shaft portion 121 protruding in parallel to the S-phase 112 in the pulley direction from near the center of the needle bar 119. The needle bar 119 is fixed to the arm 111 and is supported so as to be slidable in the vertical direction with respect to the needle bar upper and lower metals, and at the lower end, a sewing needle 122 for coordinating with a drum (not shown) to form stitching sweat is provided. It is fixed.

On the shaft portion 116 of the crank shaft 115, a thread take-up 124, through which the thread guide 123 through which the upper thread is inserted, is rotatably supported by the shaft portion 125. The end of the thread take-up crank 126 is supported to be rotatable with respect to the sewing machine frame by the thread take-up support shaft 127 parallel to the upper shaft 112. The distal end portion of the thread take-up crank 126 is rotatably connected to the middle portion of the thread take-up 124 by the shaft portion 125 projecting in the pulley direction.

The sewing machine drive mechanism works as follows. In FIG. 1, when the upper shaft 112 rotates clockwise, the counterweight 114 fixed thereto is also rotated. At this time, since the middle portion of the thread take-up 124 is connected to the thread take-up crank 126, the thread take-up crank 126 moves so as to move in the rotation range around the take-up support shaft 127. The movement is regulated to interlock with the counterweight (114). That is, when the end of the thread take-up 124 rotates on the rotational trajectory of the shaft portion 116 eccentric with respect to the rotation center of the counterweight 114, the thread guide 123 of the tip of the thread take-up 124 moves up and down. .

In addition, the movement speed of the take-up take-up 124 is the fastest when the shaft portion 116 passes near the take-up support shaft 127. When the upper shaft 112 rotates in the clockwise direction, the fastest time is when the thread take-up 124 rises. In general, when the thread take-up 124 is raised to tighten the thread of the needle, the faster the rising speed of the thread take-up 124 is suitable for sewing thick fabrics and the like.

On the other hand, since the upper part of the needle bar crank rod 120 rotates on the rotational trajectory of the shaft portion 116 eccentric with respect to the rotation center of the counterweight 114, the needle bar 119 connected to the lower part of the needle bar crank rod 120 is Move up and down.

In order to increase the vertical movement amount of the needle bar 119, the connection position of the needle bar crank rod 120 with respect to the counterweight 114 must be set to a position where the amount of eccentricity from the center of rotation of the counterweight 114 is large.

If the eccentric amount is large, since the movement trajectories of the needle bar crank rod 120 and the thread take-up crank 126 overlap and come into contact with each other when the sewing machine is driven, a problem arises in that the vertical movement amount of the needle bar 119 cannot be increased.

Particularly, in thick thick sewing machines, it is preferable to increase the needle bar as much as possible, because it is necessary to ensure as long as possible the waiting time for the needle to escape from the cloth in order to move the sewing material without difficulty. do.

In addition, although a large diameter bearing may be used to connect the rotating members in order to increase the speed of the sewing machine, a large diameter bearing may be used at the sewing machine frame side connection portion of the thread take-up crank 126 and the crank shaft connection portion of the needle bar crank rod. When used, since the diameter itself of each connecting portion is enlarged, it is impossible to use both connecting portions in contact with each other, and there is a problem in that the sewing machine can not be speeded up, and the position of the thread take-up support shaft 127 from the upper shaft 112 is increased. Although the method of separating in the direction can also be considered, in this case, since the shaft part 116 and the thread take-up support shaft 127 are spaced apart, the rising speed of the thread take-up 124 will become slow, and the thread tightening will worsen.

The length of the crank rod 120 applied to a sewing machine model for sewing a thick thick sewing material such as leather is a length of the crank rod 120 applied to a sewing machine model for sewing a sewing material such as thin cloth. It is set longer than that. That is, the crank rods used in the sewing machine for thick / museum are divided into different lengths, but the sewing machine for the thick is close to an industrial sewing machine, and the sewing machine for a museum is close to a domestic sewing machine, but the driving principle and operation of the mechanism are hardly different.

The difference between the long and short of the crank rod 120 is represented by the difference in waiting time of the needle coming out of the sewing material. In the sewing machine for sewing materials, such as leather, the length is longer than that of the crank rod 120 applied to the sewing machine for sewing because there is a need to secure a long moving time of the sewing material and increase the amount of the needle bar. The length of the crank rod 120 applied to the sewing machine for thick is longer than the length of the crank rod 120 applied to the sewing machine for museum. If the length of the crank rod is increased in the same sewing machine driving conditions, it has the advantage of sewing back sewing materials such as leather, while countering the high-speed driving suitable for thin cloth sewing materials. If the length of the crank rod is shortened, the needle bar cannot be lifted with a large force, and the waiting time of the needle bar is shortened, so sewing of sewing materials such as leather is difficult, but the speed is advantageous for sewing thin fabrics.

Looking at such a sewing machine driving mechanism, the length of the crank rod 'L1' is applied to the sewing machine for sewing materials such as thick leather and the sewing machine for sewing a relatively thin thickness of the heavens, etc. different. In case of the sewing machine for thick materials, the length of the crank rod length 'L1' is made for the sewing machine for the sewing machine. Compared to the sewing machine for thick material, it is applied to shorter length and is equipped to realize the speed and speed suitable for thin cloth bar.

Accordingly, when using a sewing machine, depending on the type of sewing material, the sewing machine for thick or thin material may be selected and used. In other words, when sewn leather or thick-thick sewing materials, a sewing machine for a thick material is used, and when sewing a thin cloth of a kind, the sewing machine for a thin material is selected and used. It is difficult to expect constant speed and speed.

On the other hand, the present invention, through the adjustment of the length of the crank rod of the sewing machine for thick material realizes the constant speed and high speed of the needle bar. Since the crank rod is a part that the tip is linked to the upper axis and the end is combined with the needle bar to move freely in the arm, the long and long lengths within the allowable range of the free movement do not affect other peripheral drive parts. Only induce changes. Therefore, the application of the adjusted crank rod alone may change the sewing machine model for the museum to the sewing machine model for sewing materials or the sewing machine model for the sewing machine model for sewing materials without directly affecting the operation of the peripheral drive mechanism. have.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 4 to 7.

Figure 4 is a side view of the needle bar and thread take-up mechanism inside the sewing machine arm adjusting the lifting trajectory of the needle bar according to an embodiment of the present invention. Figure 5 is a cross-sectional view showing a part of the front of the needle bar and the thread take-up mechanism inside the sewing machine arm adjusting the lifting trajectory of the needle bar according to an embodiment of the present invention.

4 and 5 will be described by dividing the type variable switching method of the sewing machine according to the present invention in the first to third embodiments.

According to the first embodiment, first, check the model of the sewing machine 200. Here, the sewing machine to check is a sewing machine for thick or a sewing machine for museum. Or may be a sewing machine 200 is divided into industrial, household sewing machines and the like.

Thereafter, the crank rod applied to the identified sewing machine 200 model is removed and a crank rod 210 longer or shorter than the length of the corresponding crank rod is selected. Then, the selected crank rod 210 is mounted on the upper shaft 112 of the sewing machine arm 111. The crank rod 210 mounted on the upper shaft 112 of the sewing machine arm 111 thus makes the lifting trajectory of the needle bar 119 larger or smaller than the first.

Therefore, by removing the crank rod of the sewing machine for heavy materials and removing the short crank rod 210 in the position, the lifting trajectory of the needle bar 119 becomes smaller, the waiting time for lifting is shortened, and the speed of the needle bar 119 is increased. Implemented to switch to a function similar to a sewing machine for museum. Similarly, take out the crank rod mounted on the sewing machine for the same condition and change to a crank rod 210 having a relatively long length so that the upper shaft 112 is inserted and the lifting trajectory of the needle bar 119 becomes larger and the waiting time becomes longer, and the needle bar 119. Is converted to slowing down and shows a function similar to that of a sewing machine for thick goods. Accordingly, the current sewing machine model can be used to switch to a completely different model, especially when using a sewing machine for thick water as a sewing machine for museums.

According to the second embodiment, first, the crank rod 210 having a relatively short length compared to the length of the crank rod installed on the upper shaft 112 of the arm 111 of the sewing machine for thick goods is selected, and the selected crank rod 210 is selected. To the upper shaft 112 of the sewing machine arm 111 for thick. Thereafter, the lifting trajectory of the needle bar 119 by the crank rod 210 mounted on the upper shaft of the arm is checked to correct or adjust the movement stroke of the peripheral parts. By doing so, the lifting trajectory of the needle bar 119 is adjusted, through which the sewing machine for thick has the function of the sewing machine for museum.

According to the third embodiment, the crank rod 210 having a relatively short length is selected relative to the length of the crank rod installed on the upper shaft 112 of the sewing machine arm 111 for thick goods, and the selected crank rod 210 is used for thick goods. It is attached to the upper shaft 112 of the sewing machine arm 111. Thereafter, the thread take-up 220 is shorter than the protrusion length of the thread take-up installed in the frame of the sewing machine for thick goods to adjust the lifting trajectory of the needle bar 119 and the moving stroke of the thread take-up. By doing so, the lifting trajectory of the needle bar and the moving stroke of the thread take-up can be adjusted, and through this, the initial sewing machine for the thick has the function of the sewing machine for the museum.

In the variable variable method of the sewing machine according to the first to third embodiments of the present invention, the total length of the crank rod 210 to replace the crank rod of the sewing machine for thick goods is 1/2 of the length of the crank rod of the sewing machine for thick goods. It is desirable to fit on a length range basis of 2/3. Compared to the length of the crank rod pre-installed in the sewing machine for thick materials, the crank rod 210 shortened to a reference range of 1/2 to 2/3 has a high speed of raising and lowering the needle bar 119, and has a constant speed and high speed. Show characteristics.

Referring to Figure 6, (a) is the length (L1) of the crank rod 120 pre-installed in the sewing machine for thick, (b) is the length (L2) of the crank rod 210 is adjusted in length in accordance with the present invention Is shown comparatively. Here, the length L1 of the crank rod 120 provided previously: The length L2 of the crank rod 210 whose length was adjusted is L1> L2.

In addition, according to the variable switching method of the sewing machine according to the first to the third embodiment of the present invention, the crank rod 210 to be selected in the crank rod selection step may be used by selecting the crank rod used in the sewing machine for museum. .

In addition, the method variable switching method of the sewing machine according to the first to third embodiments of the present invention may be subjected to the stroke correction and adjustment step of the peripheral parts, or to adjust the moving stroke of the thread take-up by adjusting the length of the thread take-up I can adjust it. For example, if the length of the thread take-up is shortened, the stroke radius is shortened, which is linked with the lifting trajectory of the needle bar to adjust the sewing speed of the needle and the timing of supply and relaxation of the needle to an appropriate timing. In fact, the length of the thread take-up applied to the sewing machine model for museums is shorter than the length of the thread take-up applied to the sewing machine model for thick materials.

In addition, in the variable variable method of the sewing machine according to an embodiment of the present invention, the length of the thread take-up used in the stroke correction and adjustment step of the peripheral parts is 1/2 to 2/3 of the thread take-up length of the sewing machine for water It is desirable to fit on a length range basis. When the stroke trajectory of the thread take-up is shortly adjusted, the thread take-up machine can be separately processed or manufactured and used, and the thread take-up machine used in the museum sewing machine can be used as it is. Referring to Figure 7, (a) is the length (L3) of the thread take-up 124 is installed on the sewing machine for water, (b) is the length (L4) of the length take-up 220 is adjusted according to the present invention. Here, the length L3 of the thread take-up threader 124 provided in advance: The length L4 of the thread take-up 220 whose length was adjusted is L3> L4.

According to the model selection method of the sewing machine according to an embodiment of the present invention, it is possible to easily select and use the model of the sewing machine. That is, in the selection of the sewing machine for selecting any one of the sewing machine for the thick and sewing machine for sewing, the crank rod having a relatively short length compared to the length of the crank rod installed on the upper arm of the sewing machine for the thick sewing machine It is installed on the upper arm of the arm so that the sewing machine for thick things can be easily changed to the sewing machine for museums.

Model variable crank rod of the sewing machine according to an embodiment of the present invention is a crank rod having a relatively short length compared to the overall length of the crank rod installed on the upper shaft of the sewing machine arm for thick goods. The stroke distance of the crank rod, which is shorter than the crank rod of the thick sewing machine, adjusts the needle bar elevating trajectory of the sewing machine for the thick sewing machine on the basis of the elevating trajectory of the sewing machine for museum. Here, the overall length of the crank rod to replace the sewing machine crank rod for thick is preferably adjusted to the length range of 1/2 to 2/3 with respect to the length of the crank rod of the sewing machine for thick, and to replace the sewing machine crank rod for thick The crank rod can be used as it is, the crank rod used in the sewing machine for museums, it can be processed or manufactured separately.

According to each embodiment of the present invention as described above by adjusting the length of the crank rod of the sewing machine to change the lifting trajectory of the needle bar, thereby changing the type of the sewing machine or provides the model selectivity. In this connection, by adjusting the movement stroke trajectory of the thread take-up that follows the needle bar lifting trajectory of the thick sewing machine, for example, the sewing machine for the thick material can be used as a sewing machine for the museum, or a part of the parts can be easily changed and adjusted. Through the sewing machine for water can also be used for museum.

Although the present invention has been described with reference to one embodiment shown in the drawings, the present invention is not limited to the embodiment, and may be modified and modified within the scope not departing from the gist of the present invention. Included.

Claims

Checking the model of the sewing machine; Removing the crank rod applied to the sewing machine model identified through the step and selecting a crank rod longer or shorter than the length of the corresponding crank rod; Mounting the selected crank rod on the sewing machine arm upper shaft through the step; And inducing the adjustment of the lifting trajectory of the needle bar through the crank rod mounted on the upper shaft in the step.
The method of claim 1,

The sewing machine model to be checked in the model checking step of the sewing machine is a variable type of sewing machine of the sewing machine is a sewing machine for water or a sewing machine.
Selecting a crank rod having a relatively short length compared to the length of the crank rod installed on the upper arm of the sewing machine for thick goods; Mounting the selected crank rod through the step on the upper shaft of the sewing machine arm for the after-treatment; Inducing the adjustment of the lifting trajectory of the needle bar through the crank rod mounted on the upper shaft in the step; And checking the lifting trajectory of the needle bar by the crank rod mounted on the upper shaft through the step to correct or adjust the movement stroke of the peripheral parts.
Selecting a crank rod having a relatively short length compared to the length of the crank rod installed on the upper shaft of the sewing machine arm for the thick material; Mounting the selected crank rod through the arm on the upper axis of the sewing machine for the thick material; Inducing the adjustment of the lifting trajectory of the needle bar through the crank rod mounted on the upper shaft in the step; And selecting and mounting a thread taker having a short length compared to the protruding length of the thread take-up installed in the frame of the sewing machine for thick goods.
The method according to claim 3 or 4,

The overall length of the crank rod to replace the crank rod of the sewing machine for heavy goods is a variable variable method of the sewing machine tailored to the length range of 1/2 to 2/3 relative to the length of the crank rod of the sewing machine for water.
The method according to claim 3 or 4,

The crank rod selected in the crank rod selection step is a model variable conversion method of the sewing machine using the crank rod used in the sewing machine for museums.
The method of claim 3, wherein

In the stroke correction and adjustment step of the peripheral parts, the variable trajectory method of the sewing machine for performing a stroke correction or adjustment by adjusting the length of the take-up movement trajectory of the thread take-up.
The method of claim 3, wherein

The total length of the thread take-up used in the stroke correction and adjustment step of the peripheral parts is a variable variable method of the sewing machine tailored on the basis of the length range of 1/2 to 2/3 with respect to the length of the thread take-up of the sewing machine for water.
The method of claim 4, wherein

Selecting the thread take-up and the total length of the thread take-up used in the step of mounting the thread take-up crank is variable type of sewing machine tailored on the basis of the length range of 1/2 to 2/3 with respect to the length of the sewing machine thread take-up for thick water .
The method of claim 4, wherein

Thread take-up used in the step of adjusting the stroke movement trajectory of the thread take-up machine type variable switching method of the sewing machine using the thread take-up used in the sewing machine for museum.
In the model selection method of the sewing machine for selecting any one of the sewing machine for heavy and sewing materials, the crank rod shorter in length than the length of the crank rod installed on the upper arm of the sewing machine for the thick sewing machine arm upper shaft How to select the type of sewing machine to be used by selecting the sewing machine for the thick as a sewing machine for museum.
A crank rod having a relatively short length compared to the entire length of the crank rod installed on the upper shaft of the sewing machine arm for the thick material; Variable length of the crank rod, which is shorter than the crank rod of the thick sewing machine, adjusts the needle bar elevating trajectory of the sewing machine for the thick sewing machine based on the lifting trajectory of the sewing machine for the museum to vary the sewing machine for the sewing machine for the museum. Crank Rod.
The method of claim 12,

The length of the crank rod to replace the thick sewing machine crank rod is tailored to the sewing machine model variable crank rod on the basis of the length range of 1/2 to 2/3 relative to the length of the crank rod of the sewing machine for water.
The method of claim 12,

The crank rod to replace the thick sewing machine crank rod is a variable crank rod model of the sewing machine is a crank rod used in the sewing machine for museums.