JP6334989B2 - Delivery arm type sewing machine - Google Patents

Description

The present invention relates to a delivery arm type sewing machine, and more particularly to a frame structure and a drive mechanism of a delivery arm type sewing machine that feeds a cloth in the extending direction of a cylinder.
In the present invention, front and rear refer to the front and rear direction in the cloth feeding direction, and left and right refer to the left and right direction when the sewing machine is viewed from the front. The up and down direction means the up and down direction of the sewing machine.

As this type of delivery arm type sewing machine, one that extends from a bed in a direction in which a cylinder and an arm intersect each other has been conventionally known (for example, see Patent Document 1). 4 to 6 show the appearance of the sewing machine body 11 in a conventional delivery arm type sewing machine as disclosed in Patent Document 1, FIG. 4 is a left side view of the sewing machine, and FIG. 5 is a plan view of the sewing machine. FIG. 6 and FIG. 6 are front views of the sewing machine.
As shown in FIG. 4, the cylinder 13 extends from the bed 12 in the cloth feeding direction F. The arm 14 stands horizontally on the bed 12 and extends horizontally in a direction crossing the cylinder 13. End of the arm 14 is refracted toward the distal end side of the cylinder over 13 as shown in FIG. 5, the tip of the arm 14 the head 15 is continuously provided. The head 15 is disposed above a needle plate 16 provided on the top surface of the tip of the cylinder 13.
A needle bar and a presser bar (not shown) protrude from the lower surface of the head 15, and a plurality of needles are fixed to the needle bar, and a presser bar 17 is fixed to the presser bar. The presser foot 17 is provided with an upper and lower knife, upper decoration spreader, etc. (not shown). Further, a feed dog and a looper (not shown) are provided in the cylinder 13.

As shown in FIG. 5, the main shaft 10 (upper shaft) is disposed in the arm 14 along the extending direction of the arm 14. One end of the main shaft 10 near the head 15 protrudes outside the arm 14, and a hand pulley 29 (hand wheel) is attached to one end of the main shaft 10. The hand pulley 29 is stretched by a motor belt (not shown) to transmit the power of a driving source of a sewing machine (not shown) to the main shaft 10 and is rotated by the operator's hand when the sewing machine is stopped.
A needle bar drive mechanism, a knife drive mechanism, an upper decoration drive mechanism and the like (not shown) are connected to the head 15 side of the main spindle 10, and the needle, the knife, the upper spreader, etc. are driven by the rotation of the spindle 10. A plurality of eccentric rods (not shown) are coupled to the base of the main shaft 10 on the side of the arm 14, and the eccentric rods are connected to a feed dog driving mechanism and a looper driving mechanism (not shown) arranged on the bed 12. Then, the feed dog and the looper are driven by the rotation of the main shaft 10.

In the conventional delivery arm type sewing machine configured as described above, the fabric loaded on the upper surface of the cylinder 13 is fed in the tip side of the cylinder 13, that is, in the fabric feeding direction F, and the members such as the needle and the looper cooperate with each other. Then sewing is performed. The delivery arm type sewing machine disclosed in Patent Document 1 mainly overlaps a pair of left and right fabric ends of two fabrics or a cylindrical fabric, and a double ring is formed on the overlap portion. Used to form seams or flat seams.

Japanese Patent Publication No. 30-5835 (Fig. 1-2)

  When sewing is performed using the above-described conventional delivery arm type sewing machine, the operator who performs the sewing is positioned in front of the sewing machine, that is, in front of the bed 12 in the cloth feeding direction F, and the pair of left and right fabric ends are moved to the left and right. Holding each of the hands, the ends of the dough are inserted into the upper surface of the cylinder 13 from the left and right sides of the bed 12, respectively, and the dough is fed toward a needle drop (not shown) of the needle plate 16. During sewing, the operator always needs to closely watch the vicinity of the needle drop in order to perform normal sewing. In the case of this type of conventional sewing machine, the vicinity of the needle drop is visually recognized from above the base of the arm 14 that stands on the bed 12. Become.

However, in the conventional delivery arm type sewing machine, the needle drop is on the needle plate 16 at the tip of the cylinder 13 and at a position away from the worker, and the worker must visually recognize the needle drop through the upper surface of the base of the arm 14. . Accordingly, the operator tends to bring his face closer to the needle drop over the upper surface of the base of the arm 14 in order to watch the needle drop, so that the worker's body, particularly the chest, hits the front of the base of the arm 14. . Then, heat and vibration generated by driving the sewing machine are transmitted to the worker's body, which may adversely affect the worker's body.
Further, the plurality of eccentric rods described above are arranged from the base portion of the arm 14 to the bed 12 and are very long and heavy. Therefore, a large load is applied to the plurality of eccentric rods when the sewing machine is driven, which is one factor that hinders the speeding up of the sewing machine drive.

  The present invention has been made to solve the above-mentioned problems, and its purpose is to improve the visibility of the needle drop while maintaining the operability for the operator to operate the fabric, so that the sewing machine body can be operated. It is an object of the present invention to provide a frame structure and a driving mechanism of a feeding arm type sewing machine that is difficult to hit a person's body.

  In order to achieve the above object, the invention according to claim 1 is characterized in that a base end is connected to the bed and extends in the cloth feeding direction, and a base is connected to the bed and extends horizontally in a direction intersecting the cylinder. In a delivery arm type sewing machine comprising an arm and a head that is connected to the tip of the arm and disposed above the tip of the cylinder, the bed comprises a first bed, a first connecting portion, a second bed, and a second connecting portion. A first bed to which the cylinder is connected; a base connected to an upper right side of the first bed and a first connecting part extending upward; and a base connected to an upper end of the first connecting part. And a second bed extending rightward, connected to the rear surface of the second bed and connected to the base of the arm, and disposed in the arm along the extending direction of the arm Is And an upper shaft that is rotatably supported about the axis, an intermediate shaft that is disposed in the second bed along the extending direction of the second bed and is rotatably supported about the axis, A lower shaft disposed perpendicularly to the cloth feeding direction from the upper portion of the first bed to the first connecting portion and supported to be rotatable around an axis, and is stretched on the right side of the lower shaft and the left side of the intermediate shaft. And a second belt stretched on the right side of each of the upper shaft and the intermediate shaft.

According to a second aspect of the present invention, in the delivery arm type sewing machine of the first aspect, the first connecting portion is inclined backward as it goes upward.
The invention of claim 3 is the delivery arm type sewing machine according to claim 1 or 2, wherein a drive source of the sewing machine is connected to the right end of the upper shaft, and a handwheel is attached to the right end of the intermediate shaft. To do.

According to the first aspect of the present invention, since the arm is not standing on the bed, the visibility of the operator with respect to the needle drop is improved, so that the operator's body is difficult to hit the arm or the bed. In addition, since the pocket on the right side of the first bed is sufficiently secured, there is no hindrance to inserting the operator's right hand into the cylinder upper surface, and the workability of the operator to operate the dough is not impaired. Furthermore, a wide space is secured in the interior and surface of the second bed and arm, so that each mechanism necessary for sewing can be arranged.
Further, as described above, the shape of the sewing machine main body is improved in visibility while maintaining the operability of the operator, and each drive mechanism such as a feed dog and a looper arranged on the first bed is also the first. It is connected to a lower shaft arranged on the bed and driven. A connecting member such as an eccentric rod that connects each of the drive mechanisms and the lower shaft is shorter and lighter than the conventional example, and the load on the connecting member can be reduced.

According to the second aspect of the present invention, the pressure of the first connecting portion against the operator is reduced, and the operator can easily approach the face toward the needle drop.
According to the invention of claim 3, the handwheel is disposed at a position that is safe and easy for the operator to operate.

The schematic perspective view which shows the sewing machine main body of the delivery arm type sewing machine of this invention. The schematic left view which shows the sewing machine main body of a sewing machine same as the above. The schematic which looked at the sewing machine main body of the sewing machine same as the above from the front a little. The left view which shows the sewing machine main body of the conventional delivery arm type sewing machine. The partially broken top view which shows the sewing machine main body of a sewing machine same as the above. The front view which shows the sewing machine main body of a sewing machine same as the above.

  Hereinafter, a sewing machine body 1 according to an embodiment of the present invention will be described with reference to the drawings. The part forming the outer shell of the sewing machine body 1 is indicated by a two-dot chain line. The base end of the cylinder 3 is connected to the lower part of the rear surface of the first bed 2, and the tip of the cylinder 3 extends horizontally in the feed direction F. A needle plate 9 is provided on the top surface of the tip of the cylinder 3, and the needle plate 9 is provided with a needle drop 9a. As shown in FIG. 2, the first bed 2 has a pentagonal shape when viewed from the left side, and the upper side of the front surface 2b is inclined toward the feeding direction F, that is, toward the rear as it goes upward. Further, the upper surface 2a of the first bed 2 is inclined downward toward the feeding direction F, that is, rearwardly downward.

  As shown in FIGS. 1 and 3, the base portion of the first connecting portion 6 is connected to the upper right side surface of the first bed 2, and the first connecting portion 6 extends upward while tilting backward from the base portion. doing. The lower surface of the base portion of the first connecting portion 6 is positioned higher than the upper surface of the cylinder 3. The base of the second bed 7 is connected to the top end of the first connecting portion 6, and the second bed 7 extends horizontally to the right from the base. The extending direction of the second bed 7 is orthogonal to the cloth feeding direction F.

One end of the second connecting portion 8 is connected to the right rear surface of the second bed 7, and the other end of the second connecting portion 8 is connected to the base front surface of the arm 4. The arm 4 extends from the base to the left, that is, toward the cylinder, and a head 5 is connected to the left end. The head 5 is positioned above a needle plate 9 provided on the upper surface of the cylinder 3. Each mechanism for forming a seam is provided inside the head 5 and the cylinder 3, and a plurality of needles and pressers (not shown) are arranged below the head 5. Since it is a known one, its description is omitted. The front surface of the arm 4 and the rear surface of the second bed 7 are provided with a balance for controlling the feeding of the needle yarn and the decorative yarn, a yarn feeding member such as a cam, and a yarn guiding member for guiding the flow of these yarns. Yes.

  As shown in FIGS. 1 and 3, the extending direction of the arm 4 is also orthogonal to the cloth feeding direction F. That is, the arm 4 and the second bed 7 are arranged in parallel. The arm 4, the second connecting portion 8, and the second bed 7 are connected in a "U" shape when viewed from above.

An upper shaft 18 is disposed in the arm 4 along the extending direction of the arm 4. The upper shaft 18 is supported by the arm 4 so as to be rotatable around the axis, and the right end protrudes rightward from the right side surface of the arm 4 and the left end protrudes into the head 5. A motor 23 as a drive source for the sewing machine body 1 is attached to the right side surface of the arm 4, and the right end of the upper shaft 18 is connected to a motor shaft (not shown) of the motor 23.
An intermediate shaft 19 is disposed in the second bed 7 along the extending direction of the second bed 7. The intermediate shaft 19 is supported by the second bed 7 so as to be rotatable about the axis, and the right end protrudes rightward from the right side surface of the second bed 7, and the handwheel 24 is attached to the protruding right end.
The lower shaft 20 is disposed along the left-right direction from the upper portion of the first bed 2 to the lower portion of the first connecting portion 6. The lower shaft 20 is rotatable about the axis, and the right end is supported by the first connecting portion 6 and the left end is supported by the first bed 2. As shown in FIGS. 1 to 3, the upper shaft 18, the intermediate shaft 19, and the lower shaft 20 are arranged in parallel to each other and perpendicular to the cloth feeding direction F. Further, the upper shaft 18 and the intermediate shaft 19 are positioned at the same height, and the lower shaft 20 is disposed at a position lower than the upper shaft 18 and the intermediate shaft 19.

A pulley 25 is fixed to the right end side in the arm 4 of the upper shaft 18, and a pulley 26 is fixed to the right end side in the second bed 7 of the intermediate shaft 19. The second belt 22 is stretched on the upper shaft 18 and the intermediate shaft 19 through the second connecting portion 8 and via the pulleys 25 and 26.
A pulley 27 is fixed to the left end side of the intermediate shaft 19, and a pulley 28 is fixed to the right end side in the first connecting portion 6 of the lower shaft 20. The first belt 21 is arranged along the extending direction of the first connecting portion 6 and is stretched by the intermediate shaft 19 and the lower shaft 20 via the pulley 27 and the pulley 28.
The upper shaft 18 is connected to each drive mechanism such as a needle bar, a knife, and an upper spreader (not shown) in the arm 4 or the head 5. Further, the lower shaft 20 is connected to each drive mechanism such as a feed dog and a looper (not shown) via a plurality of eccentric rods (not shown) in the first bed 2. When the upper shaft 18 is rotated by driving the motor 23, the rotation of the upper shaft 18 is transmitted to the lower shaft 20 via the second belt 22, the intermediate shaft 19, and the first belt 21, and the lower shaft 20 is transmitted to the upper shaft 18. Rotate in sync with.

  In the delivery arm type sewing machine having the sewing machine main body 1 configured as described above, when an operator performs a sewing operation, the operator faces the front surface 2b of the first bed 2 and the operator's eyes are on the upper surface of the arm 4 and They are located at almost the same height or above the upper surface of the arm 4. At this time, as shown in FIG. 3, since the arm is not standing on the upper side of the first bed 2 unlike the conventional delivery arm type sewing machine, the worker is positioned lower than the upper surface of the arm 4. 2 near the needle drop 9a of the needle plate 9 can be easily seen through the upper surface 2a. Accordingly, since the operator does not need to bring his body close to the sewing machine main body 1 in order to watch the needle drop 9a, the operator's body comes into contact with the first bed 2 of the sewing machine main body 1 and the like, and is generated from the sewing machine main body 1. There is no risk of heat and vibration being transmitted to the worker's body and adversely affecting the worker.

Further, as shown in FIG. 3, there is no portion connected to the arm 4 except for the upper portion on the right side of the first bed 2, and the portion connected to the lower right side of the first connecting portion 6. Does not exist. That bosom of the first right of the bed 2 is sufficiently wide, when the sewing machine main body 1 to begin feeding toward the fabric pledged to cylinder 3 the upper surface of the right hand operator to the needle drop 9a, ahead of course from the right arm of the elbow In other words, the second arm has a structure that is difficult to hit the sewing machine main body 1 so that the workability of the operator is not impaired.

  Further, when the upper surface 2a of the first bed 2 is inclined backward and downward as in the present embodiment, the field of view on the front side of the needle drop 9a as viewed from the operator is widened, and the visibility near the needle drop is further improved. Will be. Moreover, if it is made into the structure which inclines back as the upper part of the 1st bed front surface 2b and the 1st connection part 6 go up, while a feeling of oppression with respect to an operator will be reduced, an operator will face the needle drop 9a toward the needle drop 9a. Even if they are close to each other, the operator's body is difficult to hit by the sewing machine body 1.

  Further, as described above, the arm 4 and the second bed 7 are arranged in parallel, and are connected to the U shape by the second connecting portion 8 on the right side of the both, so that the arm 4 and the second bed 7 are inside. The space for storing each mechanism for forming the seam is sufficiently secured, and a member connected to each mechanism such as a needle thread reel member (not shown) is arranged on the front surface of the arm 4 and the rear surface of the second bed 7. Sufficient space will be secured.

As described above, the sewing machine main body 1 of the present embodiment has improved the operator's operability with respect to sewing while improving the operator's visibility against needle dropping and ensuring a large space inside the arm and on the surface. It has become. The sewing machine body 1 having such a shape is arranged on the first bed 2 by the arrangement and connection of the upper shaft 18, the intermediate shaft 19, the lower shaft 20, the first belt 21, and the second belt 22 as described above. Each drive mechanism connected to the lower shaft 20 is driven in synchronization with the rotation of the lower shaft 20. The lower shaft 20 is disposed at a position lower than the upper shaft 18 disposed on the arm 4, and a plurality of eccentric rods connecting the respective mechanisms disposed on the first bed 2 and the lower shaft 20 are, Naturally, it is shorter and lighter than that connected to the upper shaft, so that the load applied to the eccentric rod during driving of the sewing machine is reduced, and the speed of the sewing machine can be increased.

  Further, in the above-described conventional example, the hand wheel (hand pulley 29) is disposed at the tip of the main shaft 10 on the head 15 side of the arm 14, that is, on the opposite side of the operator from the arm 14, and is operated by the operator. It was not in an easy position. On the other hand, in the present embodiment, since the handwheel 24 is attached to the right end of the intermediate shaft 19, the handwheel 24 is disposed on the right side surface of the second bed 7 and at a position that is easy to operate and safe for the operator. Has been.

  The present invention is not limited to the embodiment described above. For example, a delivery arm type sewing machine in which each part of the sewing machine body 1 is arranged symmetrically does not depart from the spirit of the present invention. The same effect as the embodiment is achieved.

DESCRIPTION OF SYMBOLS 1 Sewing machine main body 2 1st bed 2a Upper surface 2b Front surface 3 Cylinder 4 Arm 5 Head 6 1st connection part 7 2nd bed 8 2nd connection part 9 Needle plate 9a Needle drop 18 Upper shaft 19 Intermediate shaft 20 Lower shaft 21 First Belt 22 Second belt 23 Motor 24 Handwheel F Cloth feed direction

Claims (3)

  A cylinder with a base connected to the bed and extending in the cloth feeding direction, an arm with a base connected to the bed and extending horizontally in a direction intersecting the cylinder, and a cylinder connected to the tip of the arm and disposed above the tip of the cylinder In the delivery arm type sewing machine having a head, the bed is composed of a first bed, a first connecting portion, a second bed, and a second connecting portion, and the first bed to which the cylinder is connected, and the first bed A first connecting part having a base connected to the upper right side and extending upward; a second bed having a base connected to the upper end of the first connecting part and extending right; and a second bed A second connecting portion connected to the rear surface and connected to the base portion of the arm, an upper shaft disposed in the arm along the extending direction of the arm and supported rotatably about the axis; Above An intermediate shaft disposed in the two beds along the extending direction of the second bed and supported so as to be rotatable about an axis, and orthogonal to the cloth feeding direction from the upper portion of the first bed to the first connecting portion. A lower shaft that is rotatably supported around the shaft, a first belt that is suspended on the right side of the lower shaft and the left side of the intermediate shaft, and on the right side of the upper shaft and the intermediate shaft, respectively. A delivery arm type sewing machine comprising a second belt to be stretched.   2. The delivery arm type sewing machine according to claim 1, wherein the first connecting portion is inclined backward as it goes upward.   The delivery arm type sewing machine according to claim 1, wherein a sewing machine driving source is connected to a right end of the upper shaft, and a hand wheel is attached to a right end of the intermediate shaft.

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