JP2001252489A - Embroidery sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embroidery sewing machine having presser foot receding means capable of causing a presser foot to appropriately and freely recede to a receded position, while preventing the rotation of a lever member which is a manually operated means, even if an actuator serving as an automatic drive means is actuated, thus eliminating the need for an extra force to operate the lever member. SOLUTION: This embroidery sewing machine has the automatic drive means for pushing up a presser bar 2 to an upper receded position according to an input signal, and the manually operated means for moving the presser bar 2 to the receded position and holding it there, both of the above means serving as the presser foot receding means for appropriately and freely pushing up the presser foot 5 to the upper receded position, and the manually operated means being actuated independently of the automatic drive means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an embroidery sewing machine. More specifically, the present invention relates to an embroidery sewing machine having a retracting means for retracting a presser foot to an upper retracted position.

[0002]

2. Description of the Related Art An embroidery sewing machine is generally provided with a presser foot driving device so that a presser foot for pressing a work cloth moves up and down in synchronization with a vertical movement of an embroidery needle. When changing the place where the work cloth is embroidered, it is necessary to retreat the presser foot from the use position, that is, the lower presser position to the upper retreat position. Therefore, a presser foot switching device, a switching means, and the like, which can freely and freely switch the presser foot between a lower presser position and an upper retreat position, have conventionally been considered and used.

For example, Japanese Patent Laying-Open No. 6-304362 discloses a presser foot switching device of an embroidery sewing machine that can freely switch between a presser position and a retracted position when necessary. FIG. 9 is a front view of the head of the embroidery sewing machine showing the presser foot switching device disclosed herein. The presser foot switching device 100 is operatively connected to an actuator 101 via a transmission mechanism, and switches the presser foot 102 by turning the actuator 101 ON and OFF.
This is a device that can be switched between a retracted position in which the presser bar 103 with the lower end fixed at the lower end is retracted upward and a use position, that is, a lower presser position. When the presser bar 103 is switched between the retracted position and the presser position, the presser foot 102 fixed to the lower end of the presser bar 103 is similarly switched between the retracted position and the presser position.

In the presser foot switching device 100 of the embroidery sewing machine, a lever member 104 is specifically disclosed as a transmission mechanism. Presser bar 103 to which presser foot 102 is fixed
The pressing member 109 is urged downward by a pressing spring 109, and is configured so that the pressing bar 103 can be pushed upward by using the lever member 104.

[0005] A base end portion 104a of the lever member 104 is connected to and linked with a rotary link 106 fixed to an output shaft 105 of the actuator 101. Lever member 104
Of the pin 104 attached to the presser bar holder 107 contacts the lower end of the presser bar holder 10.
7 is fixed to the holding bar 103. Lever member 1
The middle part 104c of the sewing machine 04 is pivotally attached to the head of the embroidery sewing machine so as to be rotatable.

Therefore, the actuator 101 is turned ON and OFF.
By switching F, the lever member 104 is rotated, and the presser bar 103 can be switched between the retracted position and the presser position via the presser bar holder 107. Further, the lever member 104 has a manual operation unit 104d, and by operating the manual operation unit 104d, the pressing bar 103
Can be switched to the retracted position, and the presser foot 102 can be retracted to the retracted position.

[0007]

However, in the presser foot switching device 100 of the embroidery sewing machine, the lever member 104 serving as a transmission mechanism is also rotated by the operation of the actuator 101 that pushes the presser bar 103 to the upper retracted position. Therefore, the operation of the actuator 101 causes the lever member 104 to rotate. As a result, there arises a problem that the rotating lever member 104, particularly the manual operation portion 104d, touches the hand. When the user presses the manual operation unit 104d of the lever member 104 to switch the presser foot 102 to the retracted position, the output shaft 105 of the actuator 101 moves simultaneously via the rotation link 106. As a result, there is a problem in that extra force for operating the lever member 104 is required.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an embroidery sewing machine provided with a presser foot retracting means capable of resolving the above-mentioned problems and allowing the presser foot to be freely retracted to the retracted position.

[0009]

SUMMARY OF THE INVENTION The inventor of the present invention has a problem that a lever member which rotates during operation of an actuator touches a hand, and when a manual operation part of a lever member is operated to switch a presser foot to a retracted position. As a result of analyzing the problem that the rotating link that is linked to the output shaft of the actuator is also moved at the same time, an extra force is required to operate the manual operation unit, all of these problems can be solved by raising the presser bar upward. When transmitting the driving force for pushing up to the presser bar, it is considered that the cause is that the member that receives the driving force of the actuator and the member that receives the driving force of the manual operation unit do not operate independently.
That is, when the manual operation portion of the lever member is operated, the rotating ring fixed to the output shaft of the actuator also moves, and conversely, when the actuator is operated, the lever member also rotates via the rotating link. I thought that the cause was that they were not independent.

Accordingly, the present inventor has further studied and found that when the presser bar is appropriately pushed up to the upper evacuation position,
Automatic driving means for pushing the presser bar to the upper evacuation position by an input signal using an actuator or the like and manual operation means for manually pushing the presser bar to the evacuation position using a lever member or the like operate independently of each other. If so, the above problem would be solved.

Accordingly, the present inventor has conducted intensive studies and found that the machine frame, a presser bar having a presser foot at a lower end portion and supported by the machine frame so as to be able to move up and down, and biasing the presser bar to a lower press position. Urging means, a presser foot driving device that synchronizes the presser bar with the embroidery needle and moves up and down by the urging force of the urging means, and independently moves the presser bar to the upper evacuation position. Presser foot retracting means for retracting the presser foot, wherein the presser foot retracting means moves the presser rod to the retracted position independently of the automatic driving means for pushing the presser rod to the retracted position by an input signal. An embroidery sewing machine having a manual operating means for holding the embroidery machine.

That is, in the embroidery sewing machine of the present invention, as a presser foot retracting means for appropriately and freely pushing the presser foot to the upper retreat position, an automatic driving means for pushing the presser bar to the upper retreat position by an input signal and this presser bar are used. The above-mentioned problem is solved by having a manual operation means for moving to the retreat position and holding it, and this means operation means is configured to operate independently of the automatic driving means.

As described above, since the manual operating means is configured to operate independently of the automatic driving means, in the embroidery sewing machine of the present invention, when the automatic driving means is driven, the manual operating means is not operated. It is stopped without operating.
Therefore, it is possible to solve the problem that the manual operation means operates and touches the hand. Further, when the presser foot is moved to the retracted position by using the manual operating means, the manual operating means is independent of the automatic driving means, so that the force for operating the manual operating means can be reduced.

Here, the presser foot retracting means includes a plate member slidably arranged vertically, and the plate member transmits the driving force of the first transmitting portion for receiving the driving force of the automatic driving means and the driving force of the manual operating means. The automatic transmission device may be configured to include an actuator and the manual operation device may be a lever member (claim 3).

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of an embroidery sewing machine according to the present invention will be described below with reference to the drawings.

First, the configuration of the embroidery sewing machine according to the present embodiment will be described with reference to FIGS. 1, 2, 7 and 8. FIG.
2 is a diagram showing the head of the embroidery sewing machine in which the presser foot 5 is at the use position, that is, the presser position.

In this embodiment, a presser bar 2 disposed vertically is supported by a lower portion of an arm 1 corresponding to a machine frame of an embroidery sewing machine via a sleeve 3 so as to be able to move up and down in a vertical direction. A presser foot 5 is fixed to a lower end of the presser bar 2 with a screw 4.

At the upper end of the presser bar 2, a presser spring 10 is disposed vertically as urging means. Therefore, presser bar 2
Is always urged downward by the urging force of the presser spring 10. The presser spring 10 is guided by a spring guide 9, and its lower end urges the presser bar 2, and its upper end is received by a spring stopper 6 inserted above the arm 1. And this spring stopper 6 is a plate 7
And the screw 8 are fixed above the arm 1. Note that a coil spring is used as the holding spring 10.

Next, the presser foot driving device according to the present embodiment will be described. A presser bar holder 11 is fixed to the presser bar 2 above the sleeve 3 with screws 11b. And the slide part 11a of this presser bar holder 11 is
The presser bar 2 is inserted into the arm guide groove 1b so as not to rotate. Further, an O-ring 13 is externally fitted to the presser bar 2 immediately below the presser bar holder 11.

Below the O-ring 13, a presser rod 12 is further fitted on the presser rod 2 so as to be vertically slidable. Therefore, the presser rod 12 is
Is always received from the holding bar holder 11 via the O-ring 13. Although not shown, the holding rod 12 is configured to move up and down by a holding cam that moves in conjunction with an upper shaft via a transmission mechanism.

Next, the presser foot retracting means in this embodiment will be described.

First, as an automatic drive means, a solenoid actuator 15 driven by turning on an input signal, that is, a switch, is provided above the head of the embroidery sewing machine of the present invention.
(Hereinafter, the “solenoid actuator” is abbreviated as “solenoid” as appropriate.) Is integrated with the solenoid bracket 16, and is attached to the arm 1 with three screws 17.

A solenoid arm 18 is integrally mounted on the drive side of the solenoid 15, that is, on the front side of the arm shown in FIG. The solenoid arm 18 turns on the switch of the solenoid 15 and turns the solenoid 15 on.
Is operated, the solenoid arm 18 is configured to rotate clockwise in the drawing of FIG.

As a manual operation means, a manual lever 21 is provided.
Are attached to the arm 1 so as to be rotatable by the rotating pins 22. The manual lever 21 has a substantially V-shape having two limbs, one limb constituting an operating portion 21b, and the other limb constituting a handle portion 21a. The rotating pin 22 pivotally supports the manual lever 21 at a portion where the manual lever 21 is bent into two limbs.

As described above, the manual lever 21 is attached to the arm 1, and the solenoid arm 18 is attached to the drive side of the solenoid 15, so that both are not in contact with each other.

Further, as a plate member, a slide plate 14
Is disposed between the arm front processing surface portion 1a and the guide plate 20 so as to be vertically slidable. At the center of the slide plate 14, two pins 14a and 14b are vertically fixed as a first transmission section and a second transmission section, respectively, as shown in FIG.

The upper pin A14a is connected to the solenoid 1
5 protrudes long, and comes into contact with the distal end portion 18 a of the solenoid arm 18. Pin B below
14b is a stepped pin. This pin B14b
Protrudes slightly toward the solenoid 15 and also protrudes toward the arm 1 and enters the arm guide groove 1b. The diameter of the portion protruding toward the arm 1 so as to enter the arm guide groove 1b is substantially the same as the groove width of the arm guide groove 1b.

Further, both ends of the lower end of the slide plate 14 are cut to the same width as the groove width of the arm guide groove 1b.
The tip is bent upward in a hook shape to form a hook portion 14c. The hook portion 14c enters the arm guide groove 1b. In this way, the slide plate 14 is guided by the pin B 14b and the hook portion 14c inserted into the arm guide groove portion 1b, and can slide up and down.

As shown in FIGS. 1, 3, 5 and 8, the guide plate 20 is provided with a pin A14a on which the operating portion 21b of the manual lever 21 can move up and down and which is attached to the slide plate 14.
Notches are provided so as not to hit the guide plate. And this notch limits the range in which the operating portion 21b moves up and down. That is, the surface that the operating portion 21b contacts below is the notch stopper portion A21a, and the surface that contacts the upper portion is the notch stopper B21b. That is, the manual lever 21 is, by its own weight, the lever operating portion 21 of the manual lever 21.
The lower surface of b comes into contact with the notch stopper portion A20a of the guide plate 20.

Next, the operation of the embroidery sewing machine according to the present invention will be described with reference to FIGS. 3, 4, 5 and 6.

In the embroidery sewing machine configured as described above, the input switch of the solenoid 15 is turned off while the embroidery sewing is being performed. The presser bar 2 reciprocates with a stroke of about 10 to 12 mm in synchronization with the vertical movement of the needle bar 23 at the presser position lowered by the urging force of the presser spring 10. More specifically, when the sewing machine motor rotates, although not shown, the presser rod 12 moves up and down with a vertical stroke of 10 to 12 mm by a presser cam that moves in conjunction with the upper shaft via a transmission mechanism. This presser rod 12
, The presser bar 2 and the presser foot 5 also move up and down. That is, when the presser bar rod 12 moves up, the presser bar rod 12 pushes up the presser bar holder 11, and as a result, the presser bar 2 to which the presser bar holder 11 is fixed also moves upward while being pushed up. When the presser rod 12 descends, the presser rod 2 descends due to the urging force of the presser spring 10. When it reaches the bottom dead center, it moves up and down while repeating the same operation upward.

At the bottom dead center, the lower end of the slide portion 11a of the presser bar holder 11 and the hook 1
The position is adjusted so as to secure a gap with 4c so as not to abut.

When the embroidery sewing is stopped and the work cloth or the frame (not shown) is replaced, the solenoid 15
, The solenoid arm 18 rotates clockwise in FIG.

As shown in FIGS. 3 and 4, when the switch of the push-up solenoid 15 is turned ON, the solenoid arm 18 rotates. As a result, the distal end 18a of the solenoid arm 18 contacts the pin A14a from below, and the pin A1
Push up 4a. As a result, the slide plate 14 is pushed up and starts to rise. As soon as the slide plate 14 starts to rise in this way, the hook portion 14c of the slide plate 14 comes into contact with the presser bar holder 11 and continues to rise further. When the slide plate 14 rises in this way, the presser bar 2 rises via the presser bar holder 11, and at the same time, the presser foot 5 also rises. Then, the slide plate 14 is rotated at a predetermined rotation angle of the holding solenoid 15.
Rises to the top dead center, and the rise of the presser bar 2 and the presser foot 5 also reaches the top dead center.

When the switch of the solenoid 15 is turned off, the presser bar 2 is pushed down by the urging force of the presser spring 10, and the presser foot 5 is lowered. The solenoid arm 18 also rotates counterclockwise while abutting against a solenoid stopper (not shown), and the solenoid arm 18 stops. As a result, the presser bar 2 and the presser foot 5 also stop at their original positions with the gap between the presser bar hug 11 and the hook portion 14c secured.

Next, the operation of the manual lever 21 will be described. The lower surface of the lever operating portion 21b of the manual lever 21 is initially in contact with the notch stopper portion A20a of the guide plate 20 by its own weight. When the handle portion 21a of the manual lever 21 is turned clockwise in FIG. 1, the operating portion 21b of the manual lever 21
14b comes into contact with the protrusion from below.

When the handle portion 21a is further pushed clockwise, the slide plate 14 to which the pin B14b is attached is mounted.
Rises, and the hook portion 14 c of the slide plate 14 comes into contact with the holding bar holder 11. When the handle portion 21a is further pushed up in the clockwise direction, the slide plate 14 is further raised, and the hook portion 14c of the slide plate 14 pushes up the presser bar holder 11, so that the presser bar 2 and the presser foot 5 are raised. At this time, the operating portion 21b of the manual lever 21 is configured so as not to overlap with the solenoid arm 18 as described above, so that the operating portion 21b does not interfere with the solenoid arm 18 while the manual lever 21 is operating.

When the manual lever 21 is further turned clockwise, the operating portion 21b of the manual lever 21 and the notch stopper B20b of the guide plate 20 come into contact with each other near the top dead center of the presser foot 5. The manual lever 21 does not rotate any more, and this position is the upper limit.

Next, when the hand force is weakened at the upper limit position of the manual lever 21, the presser bar 2 is pushed down by the urging force of the presser spring 10. As a result, the holding bar holding member 11 also descends, and the slide plate 14
Depressed through. Then, the manual lever 21 is also turned counterclockwise via the pin B14b attached to the slide plate 14. The manual lever 21 rotates until it descends to the bottom dead center of the presser foot 5, and further attempts to rotate by its own weight. However, the manual lever 21 comes into contact with the notch stopper portion A20a of the guide plate 20, and returns to the initial state.

As described above, in this embodiment, when an input signal is given to the solenoid 15, the presser bar 2 and the presser foot 5 rise together with the rise of the slide plate 14, and are pushed up to the retracted position retracted upward. In this case, the manual lever 21 is kept stopped. ON of input of solenoid 15,
Irrespective of the OFF state, even if the hand is placed near the manual lever 21 without moving the manual lever 21, there is no problem that the manual lever 21 touches the hand.

On the other hand, when the solenoid 15 is out of order, or when it is desired to temporarily raise the presser foot 5 to the retracted position without using the solenoid 15, the manual lever 21 is rotated clockwise as necessary. Then, the presser foot 5 can be retracted to the upper evacuation position.

As described above, in the embroidery sewing machine of this embodiment,
The pressing spring 10 is used as the urging means. The presser foot driving device includes a presser cam, a transmission mechanism, and a presser rod 1.
2 etc. are used. Further, the presser foot retracting means uses the solenoid 15 as the automatic driving means and the manual lever 21 as the manual operating means. Furthermore, as a plate member,
The slide plate 14 is used, and a pin A14a and a pin B14b are used as a first transmission unit and a second transmission unit, respectively.

However, the embroidery sewing machine of the present invention is not limited to the above embodiment. For example, it is not always necessary to use the holding spring 10 as the urging means, and it is also possible to use another means. Also, as the holding spring 10,
A leaf spring or the like may be used instead of the coil spring.

In this embodiment, the solenoid type actuator 15 is used as the automatic driving means. However, the present invention is not limited to the solenoid type actuator 15. Other actuators may be used. For example, a pulse motor, an air cylinder, or the like may be used. Further, the same applies to the manual operation means.
It does not have to be.

Further, in this embodiment, the driving force from the solenoid 15 and the manual lever 21 is transmitted to the presser bar 2 via the slide plate 14 as a plate member, but the plate member is not necessarily used. No need,
Other configurations are possible.

[0046]

In the embroidery sewing machine according to the present invention, when the automatic driving means is being driven, the manual operation means is stopped without operating. Therefore, it is possible to solve the problem that the manual operation means operates and touches the hand. Further, when the presser foot is moved to the retracted position by using the manual operating means, the manual operating means is independent of the automatic driving means, so that the force for operating the manual operating means can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of a head of an embroidery sewing machine, showing a presser foot retracting unit in a state where a presser foot is used.

FIG. 2 is a front view of the head of the embroidery sewing machine, showing the presser foot retracting means in a state where the presser foot is used.

FIG. 3 is a side view of the head of the embroidery sewing machine, showing a state where a presser foot is pushed up to a retracted position by an automatic driving unit.

FIG. 4 is a front view of the head of the embroidery sewing machine, showing a state in which a presser foot is pushed up to a retracted position by an automatic driving unit.

FIG. 5 is a side view of the head of the embroidery sewing machine, showing a state in which a presser foot is pushed up to a retreat position by manual operation means.

FIG. 6 is a front view of the embroidery sewing machine and the like, showing a state in which a presser foot is pushed up to a retreat position by manual operation means.

FIG. 7 is a diagram showing an outline of a slide plate.

FIG. 8 is a diagram showing an outline of a guide plate.

FIG. 9 is a front view of the head of the embroidery sewing machine, showing a conventional presser foot switching device.

[Explanation of symbols]

 1: Arm 1a: Arm front processed surface 1b: Arm guide groove 2: Presser bar 3: Sleeve 4: Screw 5: Presser foot 6: Spring stopper 7: Plate 8: Screw 9: Spring guide 10: Presser spring 11: Holder bar 11a: Slide portion 11b: Screw 12: Holding rod 13: O (O) ring 14: Slide plate 14a: Pin A 14b: Pin B 14c: Hook portion 15: Solenoid 16: Solenoid bracket 17: Screw 18: Solenoid arm 18a : Notch 20: Guide plate 20a: Notch stopper A 20b: Notch stopper B 21: Manual lever 21a: Handle 21b: Actuator 22: Rotating pin 23: Needle bar 100: Presser foot switching device 101: Actuator 102: Presser foot 103: Presser bar 104: Lever member 104a: Base end portion 104 b: Tip portion 104c: Midway portion 104d: Manual operation portion 105: Output shaft 106: Rotating link 107: Holding bar holding 108: Pin member 109: Holding spring

Claims (3)

[Claims] 1. A machine frame, a presser bar having a presser foot at a lower end and supported by the machine frame so as to be able to move up and down, an urging means for urging the presser bar to a lower press position, and the presser bar. A presser foot driving device that moves the presser bar to an upper evacuation position independently of the presser foot driving device, in synchronization with the embroidery needle and vertically moves by the urging force of the urging means. The presser foot retreating means includes an automatic drive unit that pushes the presser bar to the retracted position in response to an input signal, and a manual operating unit that moves and holds the presser bar to the retracted position independently of the automatic drive unit. An embroidery sewing machine characterized by including. 2. The presser foot retreating means includes a plate member slidably arranged vertically, the plate member comprising a first transmission unit for receiving a driving force of the automatic driving unit, and a plate member of the manual operation unit. The embroidery sewing machine according to claim 1, further comprising a second transmission unit that receives a driving force. 3. The embroidery sewing machine according to claim 1, wherein said automatic driving means is an actuator, and said manual operating means is a lever member.