JPH0585383U - Sewing machine cord support device - Google Patents

Abstract

(57) [Abstract] [Purpose] A Lifting coucher 13 and ejector device 1 arranged in the front side of the sewing machine table T with the guide rail 2 sandwiched therebetween and arranged near a holding mechanism 3 for holding a work cloth.
4 and various sensors and the cords connecting the control unit 55 and the like arranged below the base 1 of the sewing machine are prevented from coming into contact with the moving member and being damaged. [Structure] A midway part of the cords 50 and 51 arranged so as to straddle above the orthogonal movement mechanism 4 for moving the holding mechanism 3 in the orthogonal direction together with the guide rail 2 is provided upright on the arm 18 of the orthogonal movement mechanism 4. Since it is hung from the holder body 53, the midway part of the cords can be floated in the space so as not to directly contact the moving member such as the orthogonal movement mechanism. Therefore, even if the cords 50, 51 are lengthened, damage and wear of the cords 50, 51 can be prevented, and the cords 5
The inconvenience that 0,51 touches the work cloth spread on the holding mechanism and stains it can be avoided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure of a supporting device for cords in a so-called industrial sewing machine.

[0002]

[Prior Art]

 Conventionally, as this type of sewing machine, the present applicant has proposed a device described in Japanese Patent Laid-Open No. 4-24056. That is, this sewing machine has guide rails arranged in a direction orthogonal to the direction in which the sewing machine arm extends, holding means slidably supported by the guide rails, and holding means for spreading and holding the work cloth on the sewing machine table, and the holding means. Orthogonal movement means for moving the means along the guide rail in the direction orthogonal to the sewing machine arm, and parallel movement means for moving the holding means together with the guide rail in a direction parallel to the extending direction of the sewing machine arm. In the machine work cloth feeding device provided with the sewing machine, the guide rail is arranged in a space above the sewing machine table and below the sewing machine arm, while the orthogonal movement means extends in a direction parallel to the sewing machine arm and is provided on a pulley body. And a guide rail that is attached to the tip of the spline shaft and is supported so as to be rotatable and slidable in the axial direction. A rotatably supported pinion is configured with a rack fixed to the along a longitudinal direction and holding means engaged with said pinion, the drive means for rotationally driving the spline shaft.

Further, the holding means is provided with a work cloth pressing frame body, and the supporting member arranged on the front surface of the guide rail to which the rack is mounted and the pressing frame body are connected by an actuator such as an air cylinder. The presser frame is connected to and lifted up and down with respect to the sewing machine table. Further, the ejector device is configured so that the press frame can be pushed forward of the sewing machine table. Further, a sensor for detecting whether or not the work cloth or the cassette equipped with the work cloth is properly set on the holding frame body is also attached to the holding means.

[0004]

[Problems to be solved by the device]

 However, in the case of such a configuration, since the holding means moves in a wide range on the sewing machine table by the orthogonal movement means or the parallel movement means, the cords connected to the actuator or the sensor have a long margin. Need to be arranged. For this reason, since the cords have flexibility, the middle portion thereof hangs down, and is caught or rubbed between the guide rail and various moving members such as the supporting member of the base portion of the holding means and the fixed member. There are inconveniences such as disconnection of cords.

The present invention has been made to solve this inconvenience, and an object of the present invention is to provide a cord supporting device for a sewing machine capable of preventing the cords from being damaged or worn.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a guide rail arranged on the sewing machine table in a direction orthogonal to the extending direction of the sewing machine arm, and a work cloth supported slidably on the guide rail to the sewing machine table. A sewing machine comprising: holding means for unfolding and holding; orthogonal direction moving means for moving the holding means along a guide rail; and parallel moving means for moving the holding means in a direction parallel to the extending direction of the sewing machine arm. In this case, an actuator for operating the holding means and various sensors are provided in the vicinity of the holding means, and cords that connect these to a control unit under the sewing machine base are connected to the base behind the sewing machine table. A holder body that is pulled out upward from the above and suspends and supports a midway portion of the cords is rotatably provided at an appropriate position of the parallel moving means.

[0007]

[Operation and effect of the device]

 According to the configuration of the present invention as described above, the actuator and various sensors arranged in the vicinity of the holding means arranged on the front side of the sewing machine table with the guide rail interposed therebetween, the control unit arranged below the base of the sewing machine, and the like. The cords connecting the cords are arranged so as to straddle above the orthogonal direction moving means for moving the guide rail in the orthogonal direction. The midway part of the flexible cords is appropriately connected to the orthogonal direction moving means. Since it is suspended from a holder body that is erected at a certain position, it is possible to float the midway part of the cords in the space so as not to directly contact the moving member such as the orthogonal moving means. Therefore, according to the present invention, even if the cords are lengthened, it is possible to prevent the cords from being damaged or worn, and to avoid the inconvenience that the cords touch the work cloth spread on the holding means and stain it. Has the effect of saying.

[0008]

【Example】

 Next, an embodiment embodying the present invention will be described. FIG. 1 is a perspective view showing an embodiment of a work cloth feeding device of a sewing machine. The work cloth feeding device is arranged on the sewing machine table T mounted on the base 1. The work cloth feeding device is arranged in front of the guide rail 2 and the work cloth (not shown). A holding means movable on the sewing machine table T in the X direction (direction orthogonal to the longitudinal direction of the sewing machine arm M in the plan view of the sewing machine table T) and the Y direction (also parallel to the extending direction of the sewing machine arm M). And a holding mechanism 3 which is a vertical direction moving means and a parallel moving means. The orthogonal movement mechanism 4 as the orthogonal movement means and the parallel movement mechanism 5 as the parallel movement means are arranged over the space between the sewing machine arm M and the sewing machine table T and the lower portion of the sewing machine table T. ing.

The upper shaft 6 inside the sewing machine arm M and the lower shaft 7 below the sewing machine table T are connected via a timing belt 9 arranged in the base column 8 so as to rotate in the same direction. And is driven by the drive motor 10. The holding mechanism 3 includes upper and lower presser frame bodies 11a and 11b having a rectangular shape in plan view for holding the work cloth, a presser foot lifting mechanism 12 that presses the upper and lower presser frame bodies 11a and 11b and lifts them upward, and an air cylinder and the like. It is composed of an elevating actuator 13 and an ejector device 14 for pushing the lower presser frame 11b forward of the machine table T (opposite to the base column 8). Further, when the elevating actuator 13 is operated, the arm member 15 of the above-mentioned presser foot lifting mechanism 12 is rotated upward to move the upper presser frame body 11a up and down. Then, the work cloth is arranged between the upper and lower presser frame bodies 11a and 11b, and the work cloth is sandwiched and securely held. When using the cassette, the upper and lower presser frame bodies 11a and 11b are removed.

The holding mechanism 3 is connected to a supporting member 16 that is movable left and right in the X direction along the front surface of the guide rail 2 and moves integrally. The guide rail 2 is located in a space above the sewing machine table T and below the sewing machine arm M as shown in FIGS. 1 to 3, and is orthogonal to the direction in which the sewing machine arm M extends (X in FIG. 1). Direction). The lower part of the front surface of the guide rail 2 is provided with a rail portion 17 for a lower cover along the longitudinal direction of the guide rail 2. As shown in FIG. 2, the pair of arms 18 extending in the rearward direction (parallel direction) from the rear surface of the guide rail 2 are provided with guide portions 19 on their lower surfaces, and each guide portion 19 extends in the orthogonal direction. The rail 20 is slidably supported. The inner rail 20 is fixed on the base 1 at the rear of the sewing machine table T. With the above-described structure, the guide rail 2 is supported on the upper surface of the sewing machine table T so as to be freely movable in a direction parallel to the extending direction of the sewing machine arm M (Y direction) while being floated by a clearance.

Next, a parallel movement mechanism 5 for moving the guide rail 2 in the parallel direction (Y direction) will be described with reference to FIGS. 1 and 2. As shown in FIG. 1, the parallel movement mechanism 5 includes a pair of left and right guide rails 20, a pair of left and right timing belts 21 arranged in parallel with the extending direction of the guide rails 20, and a timing belt 21 thereof. The main elements are a drive shaft 22 for driving the motor and an actuator 23 such as an AC servomotor capable of rotating in the forward and reverse directions. Each timing belt 21 is wound around a pair of front and rear pulleys 24a, 24b arranged in the upper part of the base 1, and each timing belt 21 and the arm 18) fixed to the guide rail 2 are detachable by a mounting bracket 25. Connect to. It is rotationally driven by a parallel movement motor 23 provided in the base 1 via a drive timing belt 26 in the middle of the drive shaft 22 to which the pulleys 24b and 24b are attached. With this configuration, when the parallel movement motor 23 is rotated in the forward direction, the guide rail 2 is advanced toward the tip end of the sewing machine arm M via the timing belt 21, and when the parallel movement motor 23 is rotated in the reverse direction, the guide rail 2 is rotated. Moves backward in the direction of approaching the base column 8.

Next, the orthogonal movement mechanism 4 will be described with reference to FIGS. 1 to 4. The orthogonal movement mechanism 4 moves the holding mechanism 3 with respect to the guide rail 2 in the longitudinal direction on both the left and right sides (X direction), and includes a rack 30, a pinion 31, a spline shaft 32, and a timing belt. 33 and an actuator 34 such as an AC servo motor capable of rotating in the forward and reverse directions.

The rack 30 is fixed via a set screw to the upper back surface of a support member 16 having an inverted L-shaped cross section at the base of the holding mechanism 3, and the tooth surface of the rack 30 is formed downward. .. The pinion 31 that meshes with the tooth surface of the rack 30 on the upper surface side is located in the front recess at the center of the left and right of the guide rail 2, and the pinion 31 is detachably attached to the tip of the spline shaft 32. A tip portion of 32 is rotatably supported by the guide rail 2 via a bearing.

At the mounting portion on the front surface of the guide rail 2, left and right long guide rails fixed by bolts are clamped by a pair of upper and lower clamp rollers protruding rearward from the rear surface of the support member 16 at a plurality of positions. ing. Then, this nip roller is attached with a set screw. In order to prevent the support member 16 from separating from the guide rail 2, a restraint means such as a pressing member (not shown) is provided between the upper portion of the support member 16 or the rack 30 and the upper portion of the guide rail 2. Has been.

As shown in FIG. 3, a pair of support brackets 42 and 42 are provided in the internal space of the base column 8, and a rotation member is provided between the pair of support brackets 42 and 42. A pulley body 43 is arranged. The pulley body 43 is fitted onto the boss shaft via a key or the like so as to rotate integrally, and the boss shaft is rotatably supported by bearing brackets 42, 42 as a pair of supporting means via bearings. There is. A front-rear halfway portion of the spline shaft 32 extending in the front-rear direction (Y direction) above the sewing machine table T penetrates the base column 8 and is connected to the spline hole of the boss shaft which is the shaft center of the pulley body 43. It is rotatably supported only in the Y direction. As another embodiment, the pulley body 43 and the boss shaft may be integrally formed.

An actuator 34 such as an AC servomotor is mounted on a mounting base 44 provided in the base 1 so as to be vertically rotatable and adjustable in vertical position, and is driven from the actuator 34 via a gear train. A timing belt 33 is wound around the pulley 46 and the pulley body 43. When the actuator 34 is normally rotated, the pinion 31 is normally rotated through the spline shaft 32, and the support member 16 is moved to the right. When the actuator 34 is rotated in the reverse direction, the pinion 31 is rotated in the reverse direction via the spline shaft 32, and the support member 16 is moved leftward.

As shown in FIG. 1, an air hose 50 for an elevating actuator 13 such as an air cylinder for elevating and lowering the upper presser frame 11a and a lower presser frame 11b are provided in front of the machine table T (base column 8). To the air ejector device 14 for pushing out to the opposite side) and a non-contact type (not shown) for detecting the mounting state of a cassette (not shown) provided in place of the holding frame body 11. Wiring (not shown) (hereinafter, these air hoses and wirings are collectively referred to as cords) to the sensor of the sensor is located at the midpoint of the arms 18 and 18 of the orthogonal movement mechanism 4 located on the base 1. The cords are bundled in a loop portion 53a of a rod-shaped holder body 53 rotatably erected at a place or the like with a cord or the like, and the tip of the holder body 53 is shaped. It is placed or suspended on the formed placing portion 53b. The cords are connected to a control unit 55 and an air supply source (not shown) through a hole 54 formed on the upper surface of the base 1 at a position rearward of the sewing machine table T so as to extend over the guide rail 2. There is.

With the above configuration, the holding mechanism 3 can be moved in the parallel direction along the longitudinal direction of the guide rail 2 on the sewing machine table T, and the holding mechanism 3 can be moved in the orthogonal direction together with the guide rail 2. Can be made At this time, the middle portions of the cords for the actuators and sensors related to the holding mechanism 3 are placed on or suspended from the holder body 53 that is rotatably erected on the orthogonal movement mechanism 4, and the guide rails are supported. Since it is connected to the control unit or the like from the hole 54 of the base 1 straddling the upper part of the holder 2, the holder body 53 allows the cords to float in the air even when the holding mechanism 3 moves in the horizontal direction and the orthogonal direction. Since it rotates according to the movement, the holding mechanism 3 can be smoothly moved in the horizontal direction and the orthogonal direction without the cords being in the way. Even if the cords are long, the cords can be prevented from being damaged without being pinched or rubbed between the moving member such as the orthogonal movement mechanism 4 and the fixed member. In addition, the cords do not touch the work cloth spread on the holding mechanism 3, and it is possible to prevent dirt from adhering to the work cloth.

[Brief description of drawings]

FIG. 1 is a perspective view of a work cloth feeding device.

FIG. 2 is a plan view of a main part.

3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a side view showing a press-up mechanism for a presser frame body in a holding mechanism.

[Explanation of symbols]

 M sewing machine arm T sewing machine table 1 base 2 guide rail 3 holding mechanism 4 orthogonal movement mechanism 5 parallel movement mechanism 8 base column 50,51 air hose 53 holder body 54 hole 55 controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor, Motohiro Komoda, 15-1, Naeshiro-cho, Mizuho-ku, Nagoya, Brother Industry Co., Ltd. (72) Inventor Yoichi Kurahashi, 15-1 Naeshiro-cho, Mizuho-ku, Nagoya City Brother Industries, Ltd.

Claims (1)

[Scope of utility model registration request] 1. A guide rail arranged on a sewing machine table in a direction orthogonal to a direction in which a sewing machine arm extends, and a holding means slidably supported by the guide rail and spreading and holding a work cloth on the sewing machine table. A sewing machine comprising: orthogonal movement means for moving the holding means along a guide rail; and parallel movement means for moving the holding means in a direction parallel to the extending direction of the sewing machine arm.
In the vicinity of the holding means, an actuator for operating the holding means and various sensors are provided, and cords connecting these to a control unit or the like below the sewing machine base are provided above the base behind the sewing machine table. A cord supporting device for a sewing machine, characterized in that a holder body for pulling out and suspending and supporting a middle portion of the cords is erected rotatably at an appropriate position of the parallel moving means.