JP5008227B2 - sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sewing machine for performing sewing processing such as embroidery on a curved surface of a work cloth such as a peripheral surface of a hat. In the sewing machine, the left-right direction is conventionally referred to as the X direction (or V direction), and the front-rear direction is referred to as the Y direction (or H direction).
[0002]
[Prior art]
An embroidery sewing machine for embroidering a peripheral surface of a hat is illustrated as a conventional sewing machine. As shown in FIG. 7, the embroidery sewing machine 50 has a guide rail 51a projecting in parallel to the cylindrical bed 51 at the lower portion of the proximal end of the cylindrical bed 51, and is slidable along the guide rail 51a. A support frame 53 that rotatably supports a rotary drive body 52 that externally fits the hat frame that sandwiches the hat, and a transmission mechanism 54 that transmits a driving force to the rotary drive body 52. The rotary drive body 52 is driven back and forth through a support frame 53 and a drive frame 55 that rotates the rotary drive body 52 through a transmission mechanism 54 is provided.
[0003]
The transmission mechanism 54 includes a wire 58 that is wound once around the peripheral wall of the rotary drive body 52 and that has both ends attached to the drive base 55a of the drive frame 55 at intervals. A substantially intermediate portion of the wire 58 is fixed to a peripheral wall on the lower end side of the rotary drive body 52 via a clamping member (not shown). When the drive frame 55 moves in the left-right direction, the wire 58 is driven to rotate. A rotation is imparted to the body 52.
[0004]
[Problems to be solved by the invention]
However, when the embroidery process is to be performed in a wide range in the circumferential direction of the cap peripheral surface, the rotational drive body 52 needs to be greatly rotated in the circumferential direction, and the drive frame 55 needs to be able to be largely driven left and right. is there. In the conventional transmission mechanism 54, as shown in FIG. 8, the drive range A of the drive frame 55 is up to the attachment interval at both ends of the wire 58. Therefore, in order to increase the drive range A, the attachment interval is widened. Must. If it does so, especially in a multi-head type sewing machine, the space | interval of sewing machine heads and the cylindrical beds 51 must be ensured widely, and there exists a problem that a sewing machine enlarges.
[0005]
The objective of this invention is providing the sewing machine which can solve the said subject, and can make compatible the expansion of the rotational drive range of a work cloth, and the compactization of a sewing machine.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a sewing machine according to the present invention includes a support frame that is supported by a machine frame so as not to move left and right, and is rotatably supported by the support frame, and a curved surface of a work cloth extends along a circumferential surface. A rotation drive body that is stretched and held, a drive frame that is driven substantially horizontally in the left-right direction of the sewing machine, and a transmission mechanism that transmits the driving force of the drive frame so as to rotationally drive the rotation drive body, The transmission mechanism includes a left pulley and a right pulley that are pivotally supported by the support frame on both sides of the rotary drive body, and a wire intermediate portion wound around the circumferential surface of the rotary drive body at least once. In addition, both sides of the wire extending upward from the left and right sides of the rotary drive body intersect each other and then reversed by each pulley, and one side of the wire reversed by the right pulley is reversed by another pulley. Without Extends towards the end of the wire on the other hand side is provided in the drive frame, the corresponding supporting frame mounted on the left side of the drive base extending in the lateral direction, the wires other side which is inverted in the left pulley After the wire crosses the one side of the wire, it extends to the right without being reversed by another pulley, and the end of the other side of the wire is on the right side spaced from the left side of the drive base. With attached wires.
[0007]
Although it does not specifically limit as a space | interval of pulleys, The direction where it widened can enlarge the drive range to the right and left of a drive frame.
[0008]
The transmission mechanism includes a pair of second pulleys, said wire wound around the peripheral surface of the rotary drive member from being inverted by the wire Ya both sides each said second pulleys, respectively, each of said pulleys The aspect comprised so that it may be reversed by is illustrated.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show an embroidery sewing machine 1 according to a first embodiment embodying the present invention. The embroidery sewing machine 1 includes a sewing machine table 3 supported substantially horizontally on the machine frame 2, a plurality of cylindrical beds 4 arranged in the X direction of the machine frame 2, and a sewing machine corresponding to the cylindrical bed 4. A sewing head (not shown) arranged in the X direction above the table 3, a Y direction driving mechanism 5 and an X direction driving mechanism 6 supported on the machine frame 2 and provided on the lower surface of the sewing table 3, and a sewing table 3, a drive frame 7 that is horizontally moved by the Y-direction drive mechanism 5 and the X-direction drive mechanism 6, and a cap frame device 8 that is driven by the drive frame 7.
[0010]
The hat frame device 8 is for supporting the sewing processing range of the hat W in an appropriate form directly above the cylindrical bed 4, and protrudes in parallel with the cylindrical bed 4 at the lower part of the proximal end side of the cylindrical bed 4. A guide rail 11 provided, a support frame 12 supported so as to be slidable along the guide rail 11, and a hat frame 13 are rotatably fitted to the support frame 12 so as to be replaceable. And a transmission mechanism 15 that transmits the driving force of the drive frame 7 so as to rotationally drive the rotary drive body 14. The hat frame 13 is configured such that the peripheral surface of the hat W is stretched and held along the peripheral surface thereof.
[0011]
The drive frame 7 extends in the X direction, and a drive base 7a extending in the X direction corresponding to each cap frame device 8 is provided on the upper surface thereof so as to protrude forward. A support frame 12 of a cap frame device 8 is coupled to the drive frame 7 so as to be slidable along the length direction. A transmission mechanism 15 is coupled to the drive base 7a. Then, the drive frame 7 drives the rotation drive body 14 in the Y direction via the support frame 12, and the rotation drive body 14 is driven to rotate via the transmission mechanism 15.
[0012]
A needle plate 16 provided with a needle hole 16a is disposed on the top surface on the distal end side of the cylindrical bed 4, and a hook (not shown) around which a lower thread is wound is built in the lower side. A needle 17 is provided above the cylindrical bed 4 so as to be movable up and down on a sewing machine head (not shown). The cap W held on the cap frame device 8 is sewn by the cooperation of the needle 17 driven based on the sewing data and the shuttle.
[0013]
The transmission mechanism 15 is wound at least once around a pair of pulleys 21 that are pivotally supported by the support frame 12 on both sides of the rotary drive body 14 and the circumferential surface of the rotary drive body 14. The wire 22 is reversed by the pulley 21 and crossed with each other, and then attached to the drive base 7a at a distance from each other. That is, the wire 22 is reversed by the pulley 21 on the right side from one end side attached to the left side of the drive base 7a, wound around the rotary drive body 14 once, and further reversed by the pulley 21 on the left side, and then the drive base 7a. To the other end side attached to the right side. A substantially intermediate portion of the wire 22 is fixed to a peripheral wall on the lower end side of the rotary drive body 14 via a clamping member 23. When the drive frame 7 moves in the X direction, the wire 22 rotates to the rotary drive body 14 via the wire 22. Is to be granted.
[0014]
The operation of the transmission mechanism 15 of the sewing machine 1 configured as described above will be described. Since both ends of the wire 22 are reversed by the pulleys 21 and crossed with each other, they are attached to the drive base 7a at intervals. As shown in FIG. 5, the drive frame 7 can be driven until each end side of the wire 22 is almost directly above the pulley 21 that is reversed. That is, the drive range A of the drive frame 7 is expanded by the distance between the pulleys 21 compared to a conventional sewing machine (see FIG. 8) in which the pulleys 21 are not provided.
[0015]
In the sewing machine 1 of the present invention, since both ends of the wire 22 are inverted by the pulleys 21, the rotational direction of the rotary drive body 14 with respect to the movement direction of the drive frame 7 in the X direction is opposite to that of the conventional sewing machine. It has become. For this reason, when using the same embroidery data as before, it is necessary to reverse the drive direction of the X-direction drive mechanism 6. This inversion method is not particularly limited, but a method of inverting the driving direction of the driving amount in the X direction included in the embroidery data and controlling the X direction driving mechanism 6 based on the inverted data, or driving in the X direction A method for providing a switch for reversing the rotation direction of the motor that drives the mechanism 6 and turning on the switch will be exemplified.
[0016]
As described above, according to the sewing machine 1 of the present invention, the transmission mechanism 15 includes the pair of pulleys 21 that are pivotally supported by the support frame 12 on both sides of the rotary drive body 14 and the circumference of the rotary drive body 14. Since both ends are reversed by each pulley 21 and are wound around the surface, and are provided with wires 22 attached to the drive frame 7 at intervals from each other after being crossed, The drive range of the drive frame 7 can be extended. For this reason, for example, the attachment interval of the wires 22 can be configured to be narrower than that of the conventional sewing machine, and the rotation range of the rotary drive body 14 can be maintained in the same manner as the conventional sewing machine. In this way, since the interval between the sewing heads can be reduced, the lateral width of the sewing machine 1 can be reduced, and the sewing machine 1 can be configured compactly. Further, for example, if the mounting interval of the wires 22 is configured in the same manner as a conventional sewing machine, the rotation range of the rotary drive body 14 can be expanded as compared with the conventional sewing machine. In this way, the rotational range of the rotary drive body 14 can be expanded while maintaining the horizontal width of the sewing machine 1 as usual. That is, according to the present embroidery sewing machine 1, it is possible to achieve both expansion of the rotational drive range of the cap W as a work cloth and compactness.
[0017]
Next, FIG. 6 shows an embroidery sewing machine 41 according to a second embodiment of the present invention. In the embroidery sewing machine 41, the transmission mechanism 42 includes a pair of second pulleys 43, and both ends of the wire 22 wound around the circumferential surface of the rotary drive body 14 are reversed by the second pulleys 43. The second embodiment is different from the first embodiment only in that it is configured to be reversed at 21.
[0018]
Both the second pulleys 43 are pivotally supported in the longitudinal direction of one shaft 44 erected on the support frame 12 and are configured to rotate independently of each other.
[0019]
In addition to the effects of the first embodiment, according to the present invention, since the wire 22 is reversed by the pair of second pulleys 43, the rotation direction of the rotary drive body 14 with respect to the drive direction of the drive frame 7 is the conventional one. It is the same as the sewing machine. For this reason, unlike the first embodiment, it is not necessary to reverse the drive direction of the X-direction drive mechanism 6, and the conventional drive frame control method can be used as it is.
[0020]
In addition, this invention is not limited to the said embodiment, For example, it can also be suitably changed and embodied as follows, for example in the range which does not deviate from the meaning of invention.
(1) Change the distance between the pulleys 21 as appropriate.
(2) The number of times of winding the wire 22 around the rotary drive body 14 is set to two times or more.
(3) In the second embodiment, the pair of second pulleys 43 are pivotally supported on the support frame 12 by separate shafts.
[0021]
【Effect of the invention】
As described above in detail, according to the sewing machine according to the first aspect of the present invention, there is an excellent effect that it is possible to achieve both expansion of the rotational driving range of the work cloth and downsizing of the sewing machine.
[0022]
In addition to the above effects, according to the sewing machine according to the second aspect of the present invention, the conventional drive frame control method can be used as it is.
[Brief description of the drawings]
FIG. 1 is a plan sectional view of an embroidery sewing machine according to a first embodiment of the present invention.
FIG. 2 is a side sectional view showing a structure around a hat frame device of the sewing machine.
FIG. 3 is a front view of the structure around the hat frame device of the sewing machine.
FIG. 4 is a perspective view showing a transmission mechanism of the hat frame device of the sewing machine.
FIG. 5 is a front view showing the operation of the transmission mechanism.
FIG. 6 is a perspective view showing a transmission mechanism of a cap frame device in an embroidery sewing machine according to a second embodiment of the present invention.
FIG. 7 is a front view showing a peripheral structure of a conventional sewing machine hat frame device.
FIG. 8 is a front view showing the operation of the transmission mechanism of the hat frame device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Embroidery sewing machine 2 Machine frame 7 Drive frame 12 Support frame 14 Rotation drive body 15 Transmission mechanism 21 Pulley 22 Wire 41 Embroidery sewing machine 42 Transmission mechanism 43 Second pulley

Claims (2)

A support frame (12) supported by the machine frame (2) so as not to be movable left and right, and supported by the support frame (12) so as to be rotatable, and a curved surface of the work cloth (W) is stretched along the peripheral surface. The rotational drive body (14) that is held, the drive frame (7) that is driven substantially horizontally in the left-right direction of the sewing machine (1, 41), and the drive frame that rotationally drives the rotational drive body (14). A transmission mechanism (15, 42) for transmitting the driving force of (7),
The transmission mechanism (15, 42) includes a left pulley (21) and a right pulley (21) that are pivotally supported by the support frame (12) at both sides of the rotary drive body (14). ,
The wire intermediate portion is wound around the circumferential surface of the rotary drive body (14) at least once, and both the pulleys ( 21) and one side of the wire reversed by the right pulley (21) extends to the left without being reversed by another pulley, and the end of the one side of the wire is connected to the drive frame (7). The other side portion of the wire that is attached to the left side portion of the drive base (7a) corresponding to the support frame (12) and is reversed by the left pulley (21) is the one side portion of the wire. The wire extends to the right without being reversed by another pulley after being crossed with the other end of the wire, and is attached to the right side of the drive base (7a) spaced from the left side. (22) Sewing machine equipped with. The transmission mechanism (42) includes a pair of second pulleys (43),
The wire (22) wound around the peripheral surface of the rotary drive body (14) is reversed by each pulley (21) after both side portions of the wire are reversed by the respective second pulleys (43). The sewing machine according to claim 1, wherein the sewing machine is configured as described above.

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