JP4732565B2 - Embroidery sewing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an embroidery sewing machine.
[0002]
[Prior art]
In an embroidery sewing machine, a cloth or the like as an embroidery object is fixed to an embroidery frame, and the embroidery frame is moved in the XY directions to perform embroidery sewing.
The movement range of the embroidery frame is determined by the movable range of the movement mechanism on the sewing machine body side. However, in the case of an embroidery sewing machine, the movement mechanism is usually housed in the base part of the sewing machine and limited to the size of the sewing machine body. In addition, since the body part, which is the rising part of the sewing machine, limits the movement range of the embroidery frame, the movement range is not so large.
However, in recent years, the applicant of the present application has proposed a multi-stage moving mechanism in which a moving body is further provided on the moving body. According to this mechanism, the moving range is greater than the range defined by the size of the sewing machine body. There is an effect to obtain.
[0003]
[Problems to be solved by the invention]
However, if the movement range of the embroidery frame becomes large, the embroidery frame will remain protruding if the power switch is turned off without storing the embroidery frame, or if the power is turned off due to a power failure or disconnection of the cord during work. In this case, the large area is occupied and the vehicle stops. Therefore, the danger of colliding with the embroidery frame increases. In particular, in the case of a multi-stage structure, it is difficult to manually move the embroidery frame, and it is mechanically weak against a load such as a collision, which is a serious problem.
The object of the present invention is to solve the problems of the prior art.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, an embroidery sewing machine according to the present invention includes a sewing execution means for performing sewing by moving a needle up and down, an embroidery object, a means for holding the embroidery object, and the holding means. An embroidery sewing machine comprising: means for moving the means in the XY direction with respect to the sewing execution means; means for detecting power-off of the sewing machine, and maintaining power supply when the power-off is detected And means for storing the means for moving by the maintained power supply, wherein the means for moving includes at least a base carriage that moves in the X direction and a direction above the base carriage in the Y direction. an intermediate carriage moving, moves on the intermediate carriage in the Y direction, and a tip carriage mounting means for the holding, the means for the storage, the intermediate key It is accommodated at least more than half of the total length of the ridge and the tip carriage, characterized in that.
Even if the power is cut off by the above configuration, the power supply is maintained, and it is possible to store the means for moving between them, and the sewing machine does not stop while the holding means such as the embroidery frame is overhanging. In addition, since it is configured to store at least half of the total length of the intermediate carriage and the leading carriage, it is possible to suppress damage to each moving body in the event of a collision, and to reduce the time required for storage and the original position. It is possible to shorten the time for returning.
There can be various configurations of the means for maintaining the power supply, but it is maintained by providing a means for delaying the energization interruption for a predetermined time without immediately interrupting the energization by the switch-off signal. Is possible. Further, a power storage device may be provided so that the power source is automatically switched when the power source is turned off. In this case, it is possible to cope with power outages and disconnection of the power cord.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
The sewing machine of the present invention includes an arm machine frame 1 and a base 2 as shown in FIG. 1, and an XY movement mechanism is provided inside the base 2 as shown in FIG.
The leading carriage 7 that moves in connection with the XY moving mechanism extends to the outside of the base 2, and an embroidery frame 21 is attached to the embroidery frame attaching portion 20 at the tip. The arm machine frame 1 is provided with a needle bar 70 and a needle 71 which are stitch formation mechanisms 62.
[0006]
The embroidery frame 21 is attached with a cloth as an embroidery object, moved in the XY direction by the movement of the tip carriage 7 in the XY direction, and embroidery stitched by the vertical movement of the needle bar 70 and the needle 71. Has been. This embroidery sewing can be selected by a sewing mode selection button 54. When embroidery sewing is not performed, the normal sewing mode is set, and the needle bar 70 and the needle 71 are moved up and down and a feeding device (not shown). Normal sewing is executed by the cloth feed.
Reference numeral 57 denotes a start / stop button for starting and stopping the sewing machine.
[0007]
As shown in FIG. 2, the XY moving mechanism in the base 2 includes a base carriage 5 that moves in the X direction, an intermediate carriage 6 that moves on the base carriage 5 in the Y direction, and further, an intermediate carriage 6 that moves in the Y direction. It has a multistage extending structure composed of a moving tip carriage 7. In this example, the intermediate carriage 6 and the leading carriage 7 are two stages, but theoretically, it is possible to have two or more stages. An embroidery frame 21 is attached to the tip of the tip carriage 7 via an embroidery frame mounting portion 20 so that the embroidery frame 21 moves in the XY directions. The movement range of the embroidery frame 21 in the Y direction is extended by the amount of movement of the leading carriage 7.
The intermediate carriage 6 is configured to be extended and retracted by a first loop belt 9 driven by a Y-direction motor 15. The second loop belt 11 fixed to the base carriage 5 is configured to rotate with the movement of the intermediate carriage 6, and the tip carriage 7 is fixed to the second loop belt 11, and the second loop belt 11 is fixed to the second loop belt 11. The loop-shaped belt 11 is configured to extend and retract in the Y direction by the movement of the loop belt 11.
The X-direction drive motor 19 rotates the X-direction drive belt 17 and moves the base carriage 5 on the X-direction guide rail 16 to move in the X direction.
[0008]
FIG. 3 is a block diagram showing a hardware configuration, and this embodiment will be described in detail in conjunction with FIG.
The CPU 50 controls the sewing machine in accordance with a program stored in the program storage device 51. During normal sewing, the CPU 50 controls the sewing machine motor drive circuit 60 at a speed instructed by a rotational speed command device 53 that is a speed controller such as a stepping type. The sewing machine 61 is controlled to rotate, and the stitch formation mechanism 62 is driven at a sewing speed corresponding to the indicated speed. At the time of embroidery sewing, embroidery sewing is performed at the speed set by the program of the speed setting program storage device 33.
[0009]
As shown in FIG. 1, the stitch formation mechanism 62 includes a needle bar 70, a needle 71, and a cloth feed mechanism (not shown), and executes predetermined sewing. The number of rotations of the sewing machine motor 61 is detected by a motor rotation detection sensor 63 and fed back to the CPU 50 for use in speed control.
[0010]
The embroidery sewing machine includes an XY motor driving circuit 65, an XY motor 66, and the XY moving mechanism 67 described above in addition to the sewing machine motor driving circuit 60, and executes pattern sewing based on the pattern data from the stitch data storage device 30. It is like that. As described above, the XY moving mechanism 67 includes the tip carriage 7 and the embroidery frame attaching portion 20 shown in FIG. 1, and a cloth is attached to the embroidery frame 21 attached to the embroidery frame attaching portion 20, and this cloth is attached in the XY direction. The embroidery stitching is executed by moving to. 1 and 2, the width direction of the sewing machine body is X and the depth direction is Y.
[0011]
The timing signal generator 64 detects the rotational phase of the upper shaft of the sewing machine main body, detects the vertical movement of the needle 71, and generates a signal. This signal is used for timing of driving in the XY directions by the XY motor driving circuit 65. The CPU 50 inputs the timing signal and controls the XY motor driving circuit 65.
[0012]
The above-described embroidery sewing and normal sewing are performed by operating the sewing mode selection button 54. The sewing mode selection button 54 is provided on the front portion of the arm machine frame 1 as shown in FIG.
A display device 56 is further provided in the front portion, and various displays are performed by the display control device 55 in accordance with commands from the CPU 50 as shown in FIG.
Reference numeral 31 denotes a temporary storage device.
[0013]
The embroidery frame position detection device 32 detects the position of the embroidery frame 21. In this embodiment, the position of the embroidery frame 21 is sequentially confirmed from the initial position of the embroidery frame 21 and the stitch data stored in the stitch data storage device 30. Is configured to do. The position detection may be performed by providing a position sensor or the like in the XY motor 66, the XY moving mechanism 67, the front end carriage 7, or the embroidery frame 21 itself.
[0014]
The CPU 50 is further connected to a cloth / frame type selection button 36, a cloth / frame type detection device 37, and a cloth / frame type information storage device 38.
The cloth / frame type selection button 36 is used by the operator to input the cloth type or the frame type. The type of cloth is classified according to the weight, thickness, or material of the cloth. The material is determined mainly based on the frictional resistance. The types of frames are classified according to the size and weight of the frames. These categories can be set as required.
Information on the cloth type and the frame type is stored in the cloth / frame type information storage device 38, and is selected by operating the cloth / frame type selection button 36, and the information is extracted.
[0015]
Either one of the cloth / frame type detection device 37 and the cloth / frame type selection button 36 can be provided selectively, or both can be provided.
The cloth / frame type detection device 37 detects the type of the embroidery frame 21 attached to the embroidery frame attachment unit 20 and the kind of cloth that is an embroidery object attached to the embroidery frame 21. For example, the type of the embroidery frame 21 can be easily identified by providing a sensor in the embroidery frame mounting portion 20 and providing an identification signal corresponding to the type of frame on the embroidery frame 21 side. The type of cloth can be configured to detect the reflection of light by an optical sensor or the like, or the weight of the cloth by a weight sensor or the like.
Information is read from the cloth / frame type information storage device 38 in accordance with the cloth type or the frame type detected by the cloth / frame type detecting device 37.
[0016]
The embroidery frame attachment detection device 41 detects whether the embroidery frame 21 is attached to the embroidery frame attachment portion 20, and an appropriate sensor can be used. It can also be shared with a sensor that outputs an identification signal corresponding to the type of the frame.
[0017]
A timer 42 is further connected to the CPU 50. When the CPU 50 recognizes the stop of the stitch formation mechanism 62 and the stop of the XY movement mechanism 67, the CPU 42 issues a time measurement command to the timer 42. The position of the embroidery frame 21 obtained from the frame position detection device 32 is stored in the temporary storage device 31, and then the leading end carriage 7 is retracted to a predetermined position. The predetermined time can be arbitrarily set by the user using the save start time setting button 46. Further, the retracted position is usually the retracted position of the leading carriage 7, but the user can set an arbitrary position by the retracted position setting button 44. By using the retreat position setting button 44, it is possible to perform the minimum necessary movement for retreat and to shorten the time for returning to the original position stored in the temporary storage device 31.
Further, the retract position can be determined according to the type of the embroidery frame 21 selected by the cloth / frame type selection button 36 by the retract position determining device 43.
When the start / stop button 57 is operated after retraction, the CPU 50 reads the position of the embroidery frame 21 before retraction stored in the temporary storage device 31 and controls the XY movement mechanism 67 to control the original position. After the embroidery frame 21 is restored, the embroidery sewing is resumed.
[0018]
In the above configuration, the power switch 52 is an on / off switch for the entire sewing machine. Even if the power switch 52 is turned off, the power is not immediately shut off, but the power shut-off is delayed. That is, the CPU 50 is configured to send a signal to the power cut-off device 80 after a predetermined time and cut off the power supply when an off signal from the power switch 52 is inputted.
[0019]
The predetermined time is a time required for the XY moving mechanism 67 to return to the initial position (storage position). In this embodiment, until it is confirmed that the base carriage 5, the intermediate carriage 6, and the tip carriage 7 have returned to the storage position. The delay of power-off is continued.
That is, when the power is turned off, the CPU 50 controls the XY moving mechanism 67 to return the base carriage 5, intermediate carriage 6, and front end carriage 7 to the storage position (origin position). The power supply is configured to be cut off.
With this configuration, it can be avoided that the power supply is turned off and the intermediate carriage 6 and the leading carriage 7 are stopped in an extended state.
[0020]
The main body of the sewing machine is provided with a support power source such as a storage battery (not shown). The power source is turned off when the power switch 52 is operated, and at the same time, the storage battery switching device 81 is driven by the off signal to turn the power source to the storage battery. It is also possible to perform the storing operation by switching.
[0021]
Further, a power-off detection device 58 is provided, which detects power-off due to a power failure or disconnection of the cord, etc., and also by this detection, the power can be switched to a storage battery to perform the storing operation.
[0022]
The storage position is normally in a state where each carriage is completely accommodated, but can be arbitrarily set according to the purpose. However, it is desirable to store the intermediate carriage 6 and the leading carriage 7 shown in FIG. Thereby, damage to the intermediate carriage 6 and the leading carriage 7 due to an accident such as a collision can be reduced.
[0023]
The operation will be described with reference to FIGS.
In FIG. 4, when the power switch 52 is turned off (step S1), the CPU 50 delays the interruption of energization (step S2), and controls the XY moving mechanism 67 to move the base carriage 5, the intermediate carriage 6, and the leading end carriage 7. Move to the storage position (step S3). When the storing operation is completed (step S4), the energization interruption device 80 is deenergized (step S5).
[0024]
In FIG. 5, when a power-off signal is input from the power-off detection device 58 (step S10), the CPU 50 switches the power source to drive the battery (step S11). Then, the XY movement mechanism 67 is controlled to move the base carriage 5, the intermediate carriage 6, and the leading carriage 7 to the storage position (step S12). When the storage operation is completed (step S13), the storage battery is de-energized (step S13). S14).
It is also possible to switch the power source to the storage battery by turning off the power switch 52.
[0025]
In the embodiment having the above configuration, the base carriage 5, the intermediate carriage 6, and the tip carriage 7 are automatically stored in the storage position when the power is turned off or the cord is disconnected. The sewing machine does not stop in the extended state, and accidents such as catching or colliding with these carriages are suppressed.
In the present embodiment, a two-stage one is shown, but other embodiments can be applied if the embroidery position and the storage position are different.
[0026]
【The invention's effect】
As described above, according to the embroidery sewing apparatus of the present invention, the sewing machine does not stop in a state where the means for holding the embroidery object such as the embroidery frame is overhanged, and there is an effect that damage due to collision can be suppressed.
[Brief description of the drawings]
FIG. 1 is an external perspective view showing an embodiment of the present invention.
FIG. 2 is a partial plan sectional view of a base 2 showing an XY moving mechanism according to an embodiment of the present invention.
FIG. 3 is a functional block diagram of an embodiment of the present invention.
FIG. 4 is a flowchart showing the operation of one embodiment of the present invention.
FIG. 5 is a flowchart showing the operation of one embodiment of the present invention.
[Explanation of symbols]
1: arm machine frame, 2: base, 5: base carriage, 6: intermediate carriage, 7: tip carriage, 9: first loop belt, 11: second loop belt, 15: Y direction motor 16: X direction Guide rail, 17: X direction drive belt, 19: X direction drive motor, 20: Embroidery frame mounting portion, 21: Embroidery frame, 30: Stitch data storage device, 31: Temporary storage device, 32: Embroidery frame position detection device, 33: Speed setting program storage device, 34: Movement distance / speed correspondence table, 35: Speed control mode setting button, 36: Cloth / frame type selection button, 37: Cloth / frame type detection device, 38: Cloth / frame type information Storage device 41: Embroidery frame attachment detection device 42: Timer 43: Retraction position determination device 44: Retraction position setting button 46: Retraction start time setting button 50: CPU 51: Program storage device 52: Power switch, 53: Speed command device, 54: Sewing mode selection button, 55: Display control device, 56: Display device, 57: Start / stop button, 58: Power off detection device, 60: Sewing motor drive device 61: sewing machine motor, 62: stitch formation mechanism, 63: motor rotation detection sensor, 64: timing signal generator, 65: XY motor drive circuit, 66: XY motor, 67: XY movement mechanism, 69: embroidery frame, 70: Needle bar, 71: Needle, 80: Current interruption device, 81: Storage battery switching device.

Claims (3)

Sewing execution means for executing sewing by moving the needle up and down;
An embroidery object and means for holding the embroidery object;
An embroidery sewing machine comprising: means for moving the holding means in the XY directions with respect to the sewing execution means;
Means for detecting power-off of the sewing machine;
Means for maintaining power supply when power off is detected;
Means for storing the means for moving by the maintained power supply ,
The moving means includes at least a base carriage that moves in the X direction, an intermediate carriage that moves in the Y direction on the base carriage, and a tip carriage that mounts the holding means that moves in the Y direction on the intermediate carriage. And
The means for storing stores at least half of the total length of the intermediate carriage and the tip carriage;
An embroidery sewing machine characterized by that. The means for maintaining the power supply is a means for delaying energization interruption,
The embroidery sewing machine according to claim 1. The means for maintaining the power supply is a power storage device,
The embroidery sewing machine according to claim 1.

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