KR20030087976A - Cylinder-bed type sewing machine - Google Patents

Abstract

In the sewing machine of the type in which the lower axis and the book shaft are orthogonal to the cylinder bed type sewing machine, it is an object to provide a new configuration for shortening the peripheral length of the cylinder bed portion.

The bed part 2 which consists of the main body bed part 6 and the cylinder bed part 8, the thread cutting drive part 102, the book shaft 26, and the drive shaft which orthogonally crosses a book shaft, and drives the said book shaft. (22), a gear device (24) for transmitting the driving force from the drive shaft to the book shaft, a book (28) attached to the tip of the book shaft (26), and a movable scalpel (120) for grasping and cutting the thread of the needle. And a link body 50 having both ends 50a and 50b connected to the thread cutting drive unit and the movable blade, and at least the drum shaft 26, the gear device 24, the drum 28, and the movable blade 120. In the sewing machine provided in the cylinder bed part 8, the intermediate part of the link body 50 was arrange | positioned so that the space S1 and S2 between the drum 28 and the gear device 24 may pass.

Description

CYLINDER-BED TYPE SEWING MACHINE}

The present invention relates to a sewing machine having a bed portion having an elongated cylinder bed portion extending from a main body bed portion, and a gear device for transmitting a driving force from a drive shaft for driving a book to a book shaft orthogonal to the drive shaft. .

Background Art [0002] Conventionally, as a sewing machine configured such that a drive shaft for driving a book and a book shaft are orthogonal to each other, for example, one configured as shown in Figs. 6 and 7 is known. The sewing machine includes a lower shaft 208 connected to a driving source (not shown), a book driving shaft 212 receiving the driving force from the lower shaft 208 through the gear device 210, a lower shaft 208, and a book driving shaft 212. In the bed portion 202, a book shaft 206 having a drum 204 attached to its distal end and a gear device 214 for transmitting the driving force from the drum drive shaft 212 to the drum shaft 206. Equipped. The gear device 214 is constituted by a bevel gear, and is disposed in the gear box 220 which is sealed to prevent the lubricating oil and the like supplied from being sprayed into the bed to prevent burning. Moreover, the gear device 210 which transmits the driving force from the lower shaft 208 to the book drive shaft 212 is comprised by the spur gear, and is arrange | positioned in the gear box 222. As shown in FIG.

Furthermore, in the sewing machine having a thread cutting device as the sewing machine of the above-described configuration, the link body 216 has a middle portion for connecting a thread cutting drive (not shown) and a movable scalpel (not shown) to hold and cut the thread of the needle. Passes below both gear boxes 220 and 222 and is disposed in bed portion 202. One end 216a of the link body 216 is connected to the thread cutting drive, and the other end 216b is connected to the movable knife via the branch arm 218.

By the way, in the cylinder bed type sewing machine which has the cylinder bed part extended from the front-end | tip of a main body bed part, and formed in elongate shape, sewing is performed by arrange | positioning a cylindrical sewing thing so that the circumference | surroundings of the said cylinder bed part may be covered. Therefore, when the cylinder bed portion is slimmer, a smaller cylindrical sewing material can be sewn.

Typically, the gear box cannot be removed so that lubricants, etc., leak from the bed to dirty the sewing material. Thus, when the book shaft 206 is orthogonal to the lower shaft 208 (and the book drive shaft 212) and the gear device 210 and the thread cutting device are arranged in the cylinder bed, as described above, the cylinder bed portion Since the gear box 220 is disposed in the same place, the link body 216 is disposed to pass through the lower side of the gear box 220, so that the cylinder bed is lengthened in the vertical direction to secure a space. As a result, the cylinder bed could not be formed slim, and a cylindrical sewing material having a short diameter could not be handled.

Therefore, the objective of this invention is providing the structure which makes a cylinder bed part slimmer in the cylinder bed type | mold machine which arrange | positions the structure of the book shaft and the thread cutting device which a lower shaft and a book shaft orthogonally cross.

In addition, the above configuration is achieved at a low manufacturing cost.

Furthermore, the said structure is achieved by using the connection part with a thread cutting device as a conventional structure.

1 is an external perspective view of a sewing machine according to the present embodiment.

2 is a perspective view showing the basic mechanism of the sewing machine according to the present embodiment.

3 is a bottom view of a main part of the sewing machine according to the present embodiment.

4 is a side view of a main part of the sewing machine according to the present embodiment.

5 is a perspective view of a main part of the sewing machine according to the present embodiment.

6 is a bottom view of a main part of the sewing machine according to the prior art.

7 is a side view of a main part of the sewing machine according to the prior art.

Description of the main parts of the drawing

S1, S2: space between drum and gear device 2: bed part

6: main body bed part 8: cylinder bed part

22: drive shaft 24: gear device

26: drum shaft 28: drum

42: gearbox 50: link body

50a, 50b: Both ends 102: Thread cutting drive part

120: movable scalpel

According to the invention as set forth in claim 1 for achieving the above object, an elongated cylinder bed part 8 extending from the main body bed part 6 and a drum 28 disposed in the cylinder bed part and attached to the tip are attached. A book shaft 26 disposed therein, a drive shaft 22 disposed in the main body bed and connected to a drive source, and orthogonal to the book shaft, and disposed between the drive shaft and the book shaft in a cylinder bed to drive a force to the book shaft. The gear device 24 to transmit, the gear box 42 arrange | positioned so that the circumference | surroundings of the gear device may be covered, the thread cutting drive part 102 arrange | positioned in a main body bed part, and the said thread cutting drive part and a cylinder bed part are arrange | positioned. A link body 50 having both ends connected to the movable movable blade, wherein the gear box is arranged to form the spaces S1 and S2 between the drum and the drum provided at the tip of the drum shaft. That is arranged to pass through the inside of the space.

The above configuration is intended to be slim by changing the arrangement by paying attention to the fact that the arrangement of the link body in the past has been a limitation in slimming the bed portion.

A feature of the invention according to claim 2 is that, in the sewing machine according to claim 1, the gear box is cut out to form a space S1 or S2 between the book 28 and the gear device 24 and the link. The middle part of the body 50 passes through the cutout.

The feature of the invention described in claim 3 is that, in the cylinder bed sewing machine according to claim 1, the link body is formed so as to be curved only in the gear box so as to pass through the space.

EMBODIMENT OF THE INVENTION Hereinafter, the sewing machine of this invention is demonstrated based on embodiment shown in drawing.

First, a schematic configuration of the sewing machine of the present invention will be described based on FIGS. 1 and 2. The sewing machine 1 is a zigzag sewing machine capable of moving the needle bar 3 in a direction orthogonal to the conveying direction of the object to be sewing by means of a needle swing mechanism (not shown), which includes a bed part 2 and a bed part 2. The arm part 4 installed upright is provided. The bed part 2 is comprised from the main body bed part 6 and the cylinder bed part 8 of an elongate shape compared with the main body bed part 6. An oil pan 10 for storing lubricating oil is disposed below the main body bed part 6, and a book cover 12 is disposed below the cylinder bed part 8. The book cover 12 is opened and closed with respect to the bed part 2.

Rotation of the upper shaft 14 which is rotationally driven by a drive source (not shown) is transmitted to the lower shaft 18 through the timing belt 16. The rotation of the lower shaft 18 is transmitted to the book drive shaft (corresponding to the drive shaft of the present invention) 22 after the rotation speed is changed via the gear device 20. Rotation of the book drive shaft 22 is transmitted to the book shaft 26 via the gear device 24. Although the lower shaft 18 and the drum drive shaft 22 are arranged in parallel, the drum drive shaft 22 and the drum shaft 26 are arrange | positioned in the direction orthogonal to each other. Accordingly, the gear device 20 is composed of a spur gear, and the gear device 24 is composed of a bevel gear. The drum 28 is attached to the tip of the drum shaft 26.

Among the mechanism parts, the gear device 24, the book shaft 26, the book 28 are arranged in the cylinder bed 8, and the lower shaft 18, the gear device 20, the book drive shaft 22, and the like are provided. It is arrange | positioned in the main body bed part 6. The movable scalpel 120 (FIG. 5) is also arranged in the cylinder bed part 8. The cylinder bed part 8 cuts a part other than the space for accommodating mechanical parts, such as the gear device 24, the book shaft 26, the book 28, and the movable scalpel, and sew a cylindrical object to be sealed. I can do it.

As shown in FIG.3 and FIG.4, the oil supply path 32 is formed in the drum 28, and the oil supply tube which is not shown in this oil supply path 32 is connected. Lubricating oil is sent to the oil supply tube through the pump (not shown) from the oil pan 10. The oil supplied from the oil supply tube to the oil supply path 32 lubricates the sliding surface of the book shaft metal 30 and the book shaft 26 and the sliding portion of the book 28. In the book 28, the bobbin case 38 which accommodated the bobbin 36 is accommodated. The gear devices 20 and 24 are housed in the gear boxes 40 and 42, respectively, and under covers 44 and 46 are screwed to the lower part of the bed part 2 under the gear boxes 40 and 42, respectively. have. The gear box 42 of the present embodiment is cut off at an intermediate portion in the axial end direction of the book shaft metal 30 so as to form a space S1 between the drum 28 and the gear device 24, and is wider than in the prior art. This is narrowed.

The movable scalpel 120 (FIG. 5) is arrange | positioned in the vicinity of the drum 28, and a thread of a needle is caught and cut | disconnected by the said movable scalpel. The movable scalpel 120 is connected to a scalpel branch arm 48. The thread cutting drive part 102 (FIG. 5) is arrange | positioned at the main body bed part 6, The one end 50a of the link body 50 for driving the movable scalpel 120 is connected to the thread cutting drive part 102. FIG. The other end 50b is connected to the female branch arm 48.

The intermediate part between the both ends 50a and 50b of the link body 50 passes below the gear device 20 which transmits rotation of the lower shaft 18 to the north drive shaft 22. It passes inside the space S1 between the book 28 and the gear device 24. For this reason, as shown in FIG. 3, the link body 50 is arranged in the horizontal direction in the horizontal direction in the vicinity of the boundary portion 50A from the portion located in the main body bed portion 6 to the portion located in the cylinder bed portion 8. A horizontal curved portion 50A1 that curves toward 28 is formed. Furthermore, the link body 50 is curved away from the drum 28 such that the tip 50b is connected to the female branch arm 48. This is for making the connection point of the front-end | tip 50b of the link body 50 and the female branch arm 48 into the same position as before, since the arrangement | positioning position with respect to the drum is fixed. That is, the link body 50 is bent at a portion that avoids the gear box 42.

Thus, since it was comprised so that the space S1 between the book 28 and the gear device 24 may pass, the link body 50 in the cylinder bed part 8 can be arrange | positioned above conventionally. It became. Thereby, the thickness of the cylinder bed part 8 can be made thin, and the peripheral length of the cylinder bed part can be shortened.

In addition, the cutout portion is configured to pass through an intermediate portion of the link body 50. Thereby, the link body 50 in the cylinder bed part 8 can be reliably arrange | positioned upwards. In order to clearly show that the link body 50 of the present embodiment can be disposed above, FIG. 4 shows the position of the conventional link body 216 in an image line. Through this drawing, according to the conventional arrangement of the link body 216, the bottom part 12a of the book cover 12 cannot but be disposed below the position shown in the drawings, and thus obstructs the slimming of the cylinder bed part 8. It can be seen that.

Next, with reference to FIG. 5, the structure of the thread cutting drive part 102 is demonstrated and the shape of the link body 50 is demonstrated in more detail. The thread cutting drive part 102 of this embodiment includes the cam body 104 fixed to the lower axis | shaft, the scalpel drive arm 106 supported so that it may rotate about the point 106a to the sewing machine frame which is not shown in figure; A roller arm support 108 fixed to the female drive arm 106 and a roller arm 112 attached to the roller arm support 108 so as to be rotatable in a vertical direction through a pin 110. Equipped.

The roller 114 is provided in the front-end | tip of the roller arm 112. As shown in FIG. An elongated hole 106b is formed in the scalpel drive arm 106, and when the roller arm 112 rotates upward, the roller 114 passes through the elongated hole 106b and the cam groove of the cam body 104 ( It is configured to engage with 104a). The scalpel drive arm 106 is pressed to the initial position of the rotational motion by the scalpel return spring 116, and the roller arm 112 is pressed to the initial position of the rotational motion by the roller return spring 118.

One end 50a of the link body 50 is connected to the distal end of the scalpel driving arm 106. On the other hand, the movable scalpel 120 is connected to the scalpel branch 48 connected to the other end 50b of the link body 50. As described above, the boundary portion 50A of the portion located in the main body bed portion 6 of the link body 50 and the portion located in the cylinder bed portion 8 is curved in the horizontal direction at the horizontal curved portion 50A1. There is an upward bend at the upper bent portion 50A2. Thus, the thickness of the cylinder bed part 8 can be made slimmer by curved horizontally upward and passing the upper part in the space S1 between the drum 28 and the gear apparatus 24. As shown in FIG. Moreover, in the sewing machine shown, the link body 50 is bent upward by the upper curved part 51 also in the part located in the main body bed part 6.

When the thread cutting magnet (not shown) is turned ON, the roller arm 112 rotates against the pressing force of the roller return spring 118 by a link (not shown), and the tip thereof moves upward. As a result, the roller 114 is engaged with the cam groove 104a of the cam body 104. Then, the roller arm 112 and the female drive arm 106 are in a state capable of rotating around the point 106a in accordance with the shape of the cam groove 104a. When the cam body 104 rotates in accordance with the rotation of the lower shaft 18, the scalpel drive arm 106 rotates in the direction of the arrow and the link body 50 also moves in the direction of the arrow. Thereby, the scalpel branch 48 rotates, and the movable scalpel 120 moves in the direction of the arrow to grasp the thread of the needle and cooperate with the fixed scalpel 122 to cut the thread of the needle.

As mentioned above, although the sewing machine of this invention was demonstrated based on embodiment shown in drawing, this invention is not limited to this embodiment, A various change is possible. For example, as the space between the drum 28 and the gear device 24 through which the intermediate portion of the link body 50 passes, the lower space S1 is taken as an example, but it may be configured to pass through the inside of the upper space S2. It may be.

In addition, in the illustrated example, the link body 50 is disposed to pass upward from the lowermost portion of the drum 28, but the interior of the spaces S1 and S2 between the drum 28 and the gear device 24 is provided. When passing, the effect of the present invention can be obtained, and if it is inside the spaces S1 and S2, it may pass below the lowermost part of the drum 28.

According to the sewing machine of the present invention, since the middle portion of the link body is arranged to pass through the space between the drum and the gear device, the vertical width of the cylinder bed portion can be narrowed, so that the cylinder bed portion can be more replenished, and thus slimmer. One cylindrical sewing can be sewn.

Further, by cutting the gear box so as to form a space between the book and the gear device, and configuring the intermediate portion of the link body to pass through the cut-out portion, the link body can be placed upwards and the manufacturing cost can be reduced. .

Furthermore, by forming the link body to bend through the space portion, the cylinder bed portion can be made slim without moving the connection portion with the thread cutting device.

Claims (3)

An elongated cylinder bed portion extending from the main body bed portion, A book shaft disposed in the cylinder bed portion and having a book attached to the tip, A drive shaft disposed in the main body bed portion and connected to a drive source and orthogonal to the book shaft; A gear device disposed between the drive shaft and the book shaft in a cylinder bed and transmitting a driving force to the book shaft; A gear box arranged to cover the circumference of the gear device; A thread cutting drive unit disposed in the main body bed portion, A link body connected at both ends to a movable scalpel disposed in the seal cutting drive unit and the cylinder bed unit; The gear box is arranged to form a space between the book and the drum installed on the tip of the shaft, the cylinder bed type sewing machine, characterized in that the intermediate portion of the link body is arranged to pass through the inside of the space. The cylinder bed sewing machine according to claim 1, wherein the gear box is cut out to form a space between the book and the gear device, and an intermediate portion of the link body passes through the cutout part. The cylinder bed type sewing machine according to claim 1, wherein the link body is formed to be curved in the gear box to pass through the space.