JP6343185B2 - 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 yarn reeling 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). 5 to 7 show the appearance of the sewing machine body 11 in a conventional delivery arm type sewing machine as disclosed in Patent Document 1, FIG. 5 is a left side view of the sewing machine, and FIG. 6 is a plan view of the sewing machine. FIG. 7 is a front view of the sewing machine. FIG. 8 is an enlarged cross-sectional view of the yarn reeling mechanism in the conventional delivery arm type sewing machine disclosed in Patent Document 1.
As shown in FIG. 5, 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. As shown in FIG. 6, the distal end portion of the arm 14 is refracted toward the distal end side of the cylinder 13, and a head portion 15 is connected to the distal end of the arm 14. 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. 6, 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.

  Further, as shown in FIG. 8, this type of delivery arm type sewing machine is provided with a yarn reeling cam chamber 30 with its upper surface covered with a lid 31 in the middle of the extending direction of the arm 14. In the yarn reeling cam chamber 30, a lower yarn reeling mechanism having a lower yarn reeling cam 32 and an upper yarn reeling mechanism having an upper yarn reeling cam 33 are arranged. The lower thread reeling mechanism controls the feeding of the looper thread serving as the lower thread. The upper thread reeling mechanism controls the feeding of the upper decorative thread that becomes the upper thread. Both the yarn reeling cams 32 and 33 are fixed in the middle of the main shaft 10 in the yarn reeling cam chamber 30 in the arm 14. In accordance with the rotation of the main shaft 10, both the yarn reeling cams 32 and 33 are also rotated.

  In the conventional delivery arm type sewing machine configured as described above, the cloth stacked on the upper surface of the cylinder 13 is fed in the tip side of the cylinder 13, that is, in the cloth feeding direction F, and each of the needle, looper, upper spreader, etc. The members cooperate to perform sewing. 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.

JP 2011-62273 A (FIG. 1-2)

  By the way, the upper thread take-up cam 33 must be fixed to a fully rotating shaft. In the conventional delivery arm type sewing machine, only the main shaft 10 exists as a fully rotating shaft because of the structure of the frame. Since each drive mechanism is connected to the head 15 side and the arm 14 base side of the main shaft 10, the upper thread take-up cam 33 is fixed in the middle of the main shaft 10. Due to this configuration, when the upper thread passing through the outer peripheral surface of the upper thread reel cam 33 is accidentally cut and wound around the main shaft, the upper thread is removed, or when the upper thread reel cam 33 is damaged and a new upper thread reel cam is formed. There is a problem that the attaching / detaching operation of the upper thread take-up cam 33 is difficult in the case of changing to the other.

  Further, in the conventional delivery arm type sewing machine, there is a problem in the operability for the operator to operate the cloth loaded on the upper surface of the cylinder 13 and the visibility for visually checking the vicinity of the needle drop from the upper part of the base of the arm 14 standing on the bed 12. In order to prevent this, the upper thread take-up cam 33 is generally disposed inside the arm 14, and the adjustment of the thread supply amount and tension to the upper cover spreader of the upper cover thread is performed by opening the lid 31 and the arm. 14 from the top. However, this configuration has a problem that the adjustment work described above is difficult.

  The present invention has been made in order to solve the above-described problems, and the purpose thereof is to maintain the operability of the operator to operate the fabric while maintaining high needle drop visibility, It is an object of the present invention to provide a feeding arm type sewing machine frame structure and a thread reeling mechanism that can easily perform a removing operation and an adjusting operation.

In order to achieve the above object, the invention described in claim 1
A cylinder whose base end is connected to the bed and extends in the cloth feeding direction;
An arm that has a base connected to the bed and extends horizontally in a direction intersecting the cylinder;
In a delivery arm type sewing machine having a head arranged continuously to the arm tip and disposed above the cylinder tip,
The bed includes a first bed, a first connecting part, a second bed, and a second connecting part.
A first bed to which the cylinder is connected;
A first connecting part having a base connected to the upper right side of the first bed and extending upward;
A second bed having a base connected to an upper end of the first connecting portion and extending rightward;
A second connecting part connected to the rear surface of the second bed and connected to the base of the arm;
An upper shaft disposed in the arm along the extending direction of the arm and supported so as to be rotatable about an axis;
An intermediate shaft disposed in the second bed along the extending direction of the second bed and supported so as to be rotatable about an axis, and rotated in conjunction with the upper shaft;
A lower shaft that is arranged orthogonally to the cloth feeding direction from the upper part of the first bed to the first connecting portion and is supported so as to be rotatable around an axis, and is rotated in conjunction with the intermediate shaft;
An upper thread take-up shaft extending in a direction intersecting with the intermediate shaft and having one end protruding from the rear surface of the second bed;
A power transmission mechanism for transmitting the rotation of the intermediate shaft to the upper thread take-up shaft;
An upper thread take-up cam fixed to one projecting end of the upper thread take-up shaft is provided.

The invention of claim 2 is the delivery arm type sewing machine of claim 1,
The power transmission mechanism is
A worm fixed to the intermediate shaft;
A worm wheel fixed to the upper thread take-up shaft and engaged with the worm is provided.

The invention of claim 3 is the delivery arm type sewing machine of claims 1 to 2,
A first belt stretched on the right side of the lower shaft and the left side of the intermediate shaft;
A second belt is provided on the right side of each of the upper shaft and the intermediate shaft.

The invention of claim 4 is the delivery arm type sewing machine of claim 3,
The first connecting part is inclined backward as it goes upward.

According to the present invention, since the arm is not standing on the bed, the operator's visibility with respect to the needle drop is improved, and the pocket on the right side of the first bed is sufficiently secured. Is not hindered from being inserted into the upper surface of the cylinder, and the workability of the operator to operate the dough is not impaired.
As described above, the shape of the main body of the sewing machine improves the visibility while maintaining the operability of the operator, and the upper thread reel cam is fixed to one end of the upper thread reel shaft protruding from the rear surface of the second bed. Therefore, the work of attaching / detaching the upper thread take-up cam and the adjustment work can be easily performed.

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 top 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. The expanded sectional view which shows the yarn reeling mechanism 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 2d of the first bed 2, and the tip of the cylinder 3 extends horizontally in the cloth feeding 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 part of the front surface 2b is inclined toward the cloth 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, that is, downwardly downward as it goes in the cloth feeding direction F.

  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 to the left, that is, toward the cylinder 3 from the base, 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. On the front surface of the arm 4, a balance for controlling the feeding of the needle thread and a thread guide member for guiding the flow of the thread are provided.

  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 4, 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 driving mechanisms such as a needle bar, a knife, and an upper spreader 36 (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 37 (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. The upper spreader 36 swings around the needle drop 9 a in conjunction with the upper shaft 18, and the looper 37 swings below the needle plate 9 in the cylinder 3 in conjunction with the lower shaft 20.

  Next, the lower thread reeling mechanism will be described. The left end of the lower shaft 20 protrudes from the left side surface 2 c of the first bed 2. The lower thread take-up cam 41 is fixed to the left end of the lower shaft 20 outside the first bed 2 and rotates together with the lower shaft 20. The looper yarn to be the lower yarn is supplied to the looper 37 through a lower yarn feed cam 41 from a yarn supply source (not shown) while being controlled by the lower yarn feed cam 41.

  Next, the upper thread reel mechanism will be described. In the second bed 7, an upper thread reel 42 is disposed below the intermediate shaft 19 and extends in a direction intersecting with the intermediate shaft 19. The upper thread take-up shaft 42 is supported by the second bed 7 so as to be rotatable about the axis, and the rear end protrudes from the rear surface 7 a of the second bed 7. The upper thread take-up cam 45 is fixed to the rear end of the upper thread take-up shaft 42 outside the second bed 7. A worm 43 is fixed in the middle of the intermediate shaft 19. A worm wheel 44 that engages with the worm 43 is fixed to the front end side of the upper thread take-up shaft 42. With the above configuration, the upper thread take-up cam 45 rotates together with the upper thread take-up shaft 42 in conjunction with the intermediate shaft 19. The upper decorative yarn that is the upper yarn is supplied to the upper decorative spreader 36 from a yarn supply source (not shown) through the upper yarn feeding cam 45 while being controlled by the upper yarn feeding cam 45. In this embodiment, the worm 43 and the worm wheel 44 are used as the power transmission mechanism, but the present invention is not limited to this.

  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. 4, the arm is not standing on the upper side of the first bed 2 unlike the conventional delivery arm type sewing machine, so that the operator 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. 4, 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. In other words, the right pocket on the right side of the first bed 2 is sufficiently wide, and the sewing machine body 1 is not limited to the tip of the elbow of the right arm when the operator inserts his right hand into the upper surface of the cylinder 3 and feeds the fabric toward the needle drop 9a. In other words, the second arm has a structure that is difficult to hit the sewing machine main body 1 and does not impair the workability of the operator.

  Furthermore, if the upper surface 2a of the first bed 2 is inclined backward and downward as in this embodiment, the field of view on the front side of the needle drop 9a is widened when viewed from the operator, and the visibility near the needle drop 9a is further increased. Will be improved. 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, 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.

  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 bed and on the surface. It has become. In the sewing machine body 1 having such a shape, the arrangement of the intermediate shaft 19, the upper thread reel shaft 42, the worm 43, the worm wheel 44, and the upper thread reel cam 45 causes the upper thread reel cam 45 to be connected to the rear surface 7 a of the second bed 7. Since the upper thread take-up shaft 42 is fixed to the rear end of the upper thread take-up shaft 42, the upper thread take-up cam 45 can be easily attached / detached and adjusted. Further, as described above, the arm 4 and the second bed 7 are arranged in parallel and connected to the U-shape by the second connecting portion 8 on the right side of the both, so that the rear surface 7a of the second bed 7 A sufficient space for arranging the yarn reeling cam 45 is ensured.

  Further, in the conventional example, that is, in which the thread take-up cam is fixed to the upper shaft, the lower thread take-up cam has a problem in that it is difficult to install / remove and adjust as in the case of the upper thread take-up cam. On the other hand, in the present embodiment, as described above, since the lower thread reeling cam 41 is fixed to the left end of the lower shaft 20 protruding from the left side surface 2c of the first bed 2, the operator Installation / removal work and adjustment work can be performed easily. Further, since the lower shaft 20 is disposed at a position lower than the upper shaft 18 disposed on the arm 4, the lower thread take-up cam 41 has a distance to the looper as compared with the conventional example, that is, the one fixed to the upper shaft. Is close. That is, the looper yarn has a short yarn path from the lower yarn feed cam 41 to the looper 37, and therefore is not easily influenced by the expansion and contraction characteristics of the yarn, and the lower yarn feed cam 41 can accurately control the feeding of the looper yarn.

  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.

1 sewing machine body 2 first bed 2a upper surface 2b front surface 2c left side surface 2d rear surface 3 cylinder 4 arm 5 head 6 first connection portion 7 second bed 8 second connection portion 9 needle plate 9a needle drop 18 upper shaft 19 intermediate shaft 20 Lower shaft 21 First belt 22 Second belt 36 Upper spreader 37 Looper 41 Lower thread reel cam 42 Upper thread reel shaft 43 Worm 44 Warm wheel 45 Upper thread reel cam F Cloth feed direction

Claims (4)

A cylinder whose base end is connected to the bed and extends in the cloth feeding direction;
An arm that has a base connected to the bed and extends horizontally in a direction intersecting the cylinder;
In a delivery arm type sewing machine having a head arranged continuously to the arm tip and disposed above the cylinder tip,
The bed includes a first bed, a first connecting part, a second bed, and a second connecting part.
A first bed to which the cylinder is connected;
A first connecting part having a base connected to the upper right side of the first bed and extending upward;
A second bed having a base connected to an upper end of the first connecting portion and extending rightward;
A second connecting part connected to the rear surface of the second bed and connected to the base of the arm;
An upper shaft disposed in the arm along the extending direction of the arm and supported so as to be rotatable about an axis;
An intermediate shaft disposed in the second bed along the extending direction of the second bed and supported so as to be rotatable about an axis, and rotated in conjunction with the upper shaft;
A lower shaft that is arranged orthogonally to the cloth feeding direction from the upper part of the first bed to the first connecting portion and is supported so as to be rotatable around an axis, and is rotated in conjunction with the intermediate shaft;
An upper thread take-up shaft extending in a direction intersecting with the intermediate shaft and having one end protruding from the rear surface of the second bed;
A power transmission mechanism for transmitting the rotation of the intermediate shaft to the upper thread take-up shaft;
A delivery arm type sewing machine comprising an upper thread take-up cam fixed to one projecting end of the upper thread take-up shaft. The power transmission mechanism is
A worm fixed to the intermediate shaft;
The delivery arm type sewing machine according to claim 1, further comprising a worm wheel fixed to the upper thread take-up shaft and engaged with the worm. A first belt stretched on the right side of the lower shaft and the left side of the intermediate shaft;
3. The delivery arm type sewing machine according to claim 1, further comprising a second belt stretched on the right side of each of the upper shaft and the intermediate shaft. 4.   4. The delivery arm type sewing machine according to claim 3, wherein the first connecting portion is inclined backward as it goes upward.

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