WO2006011413A1

WO2006011413A1 - Embroidery device installable on sewing machine bed

Info

Publication number: WO2006011413A1
Application number: PCT/JP2005/013387
Authority: WO
Inventors: Hiroaki Fukao
Original assignee: Brother Kogyo Kabushiki Kaisha
Priority date: 2004-07-27
Filing date: 2005-07-21
Publication date: 2006-02-02
Also published as: JP2006034561A; JP4305958B2

Abstract

An embroidery device (30) removably installed on a sewing machine bed section (1) of a sewing machine (M) and having an embroidery frame feed mechanism for moving an embroidery frame (33) holding working cloth. The sewing machine (M) is capable of executing a normal mode where sewing operation is performed by vertically moving feed teeth (13) provided at the sewing machine bed section (1) and an embroidery mode where embroidery operation is performed with the feeder teeth (13) held sunken below a needle plate (1b). The embroidery device (30) can be installed on the sewing machine bed section and is provided with mode change means (35) and selection change means (50). The mode change means (35) changes the feed teeth (13) between the normal mode and the embroidery mode while being installed on the sewing machine bed section (1). The selection change means (50) changes, when the embroidery device (30) is removed from the sewing machine bed section (1), the state of the mode change means to the embroidery mode side in conjunction with the removal operation.

Description

Specification

Embroidery device that can be attached to the machine bed

Technical field

The present invention relates to an embroidery apparatus that is equipped with an embroidery frame feed mechanism that moves an embroidery frame that holds a work cloth and that can be attached to a sewing machine bed that is detachably attached to a sewing machine bed.

Background art

Conventionally, an embroidery device having a built-in embroidery frame moving mechanism is detachably attached to a machine bed portion (free arm), and the embroidery frame holding a work cloth is orthogonally crossed in two directions by the embroidery device ( A sewing machine that can perform embroidery sewing operations while moving in the X and Y directions) is provided. In this type of sewing machine, when the embroidery device is not installed (removed and V), the feed dog is moved up and down (and moved back and forth) to feed the fabric. Various types of practical sewing such as sewing and zigzag sewing can be performed (normal mode).

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[0003] When the embroidery device is attached to the free arm, the embroidery device-side connector is connected to the sewing machine-side connector so that electrical connection is made. In addition, embroidery stitching is executed in a state in which the feed dog is switched to an embroidery mode in which the feed dog is lowered below the throat plate and held in a subsidence state. In this embroidery mode, it is possible to prevent the feed dog from interfering with the embroidery stitching by preventing the feed dog from protruding to the upper surface side of the needle plate.

[0004] For example, Japanese Patent No. 3292467 discloses a sewing machine having a mechanism for automatically switching the feed dog from the normal mode to the embroidery mode when the embroidery device is mounted on the sewing machine. . In this sewing machine, the feed dog is moved up and down in synchronism with the vertical movement of the needle bar by bringing the vertical movement lever into contact with the eccentric cam provided on the lower shaft without mounting the embroidery device. It is summer. The eccentric cam is integrally provided with a concentric cam portion that does not raise the feed dog, and the eccentric cam is configured to be movable in the axial direction. When the embroidery device is mounted on the sewing machine, the extrusion cam provided in the embroidery device is provided. The horizontal rotation lever is rotated by one piece. In this case, the feed dog is held in the depressed state by sliding the eccentric cam and bringing the vertical movement lever into contact with the concentric cam portion.

[0005] By the way, recently, as the embroidery frame is enlarged so that a large embroidery pattern can be sewn, the embroidery apparatus is also enlarged. Therefore, there has been proposed a sewing machine in which the embroidery device can be used as an auxiliary bed with the embroidery device mounted on the free arm (the embroidery frame is removed), and the cloth feed by the feed dog can be performed. Yes. In this case, even when the embroidery device is mounted, the user-power feed dog mode can be switched between the normal mode and the embroidery mode so that both the practical sewing and the embroidery sewing can be executed. There is a need.

[0006] For example, Japanese Patent Application Publication No. 1999254254 discloses a sewing machine in which an operation member for switching operation / inactivation of a feed dog is provided on an embroidery device so as to be slidable. ing. This sewing machine is configured to switch the operation / non-operation of the feed dog by switching the engagement of the cam follower with the vertical drive cam and the rest cam provided on the lower shaft. Then, when the operation member is operated, the pivot member is rotated via the transmission member, and the engagement of the cam follower with respect to the two cams is switched. Disclosure of the Invention

Problems to be solved by the invention

[0007] By the way, in a sewing machine that can perform both practical sewing and embroidery sewing even when the embroidery device as described above is mounted, when the embroidery device is detached from the sewing machine bed portion, There are both cases where the state of the operation member and the transmission member is a state corresponding to the embroidery mode and a state corresponding to the normal mode. Therefore, when the user tries to perform embroidery sewing next time the embroidery device is mounted on the sewing machine bed, the operation member and the transmission member of the embroidery device are in a state corresponding to the normal mode. That happens. In this case, even if the embroidery device is installed, the feed dog mode is in the normal mode.

[0008] Therefore, when the user mounts the embroidery device on the sewing machine bed portion, the user is required to determine which force the feed dog is currently in before the sewing is started (the operation member is set to a position corresponding to the embroidery mode). It is necessary to check a certain force). If embroidery sewing is started without confirming the check, the feed dog will move up and down in the normal mode even though the embroidery frame is moved in the embroidery device, and the thread on the lower surface of the work cloth will move. There is a possibility that embroidery sewing cannot be performed properly due to the hooking force on the feed dog. In addition, when it is confirmed that the feed dog is in the normal mode, the user needs to perform an operation to switch to the embroidery mode, and the user feels troublesome or the start of the embroidery sewing is delayed correspondingly. There was also inconvenience.

[0009] An object of the present invention is to make it possible to switch the feed dog mode on the sewing machine bed side, and is troublesome for the user when the user is mounted on the sewing machine bed for embroidery sewing. It is an object of the present invention to provide an embroidery device that can be mounted on a sewing machine bed that can start embroidery sewing quickly without forcing a strict check operation or operation.

Means for solving the problem

[0010] The present invention performs a normal mode in which a sewing operation is performed while moving the feed dog provided on the sewing machine bed up and down, and a sewing operation is performed while the feed dog is held in a lowered state below the needle plate. In the sewing machine bed portion that is detachably mounted on the sewing machine bed portion that can execute the embroidery mode, and that includes an embroidery frame feed mechanism that moves the embroidery frame that holds the work cloth. A mode switching means for selectively switching the feed dog between a normal mode and an embroidery mode in a state where the embroidery device is mounted on the sewing machine bed, and the sewing machine bed. And a selection switching means for bringing the mode switching means to the embroidery mode side in conjunction with the removal operation.

The invention's effect

[0011] The embroidery device that can be mounted on the sewing machine bed portion of the present invention is capable of switching the feed dog mode on the sewing machine bed portion side by the mode switching means, and is taken from the sewing bed portion. At the time of removal, the state of the mode switching means is automatically switched to the embroidery mode side in conjunction with the removal operation by the selection switching means. In this case, embroidery sewing can be started immediately without forcing the user to perform troublesome confirmation work and operation.

Brief Description of Drawings FIG. 1 shows an embodiment of the present invention, and is a perspective view of a sewing machine with an embroidery device mounted thereon.

FIG. 2A is a plan view showing a configuration of a feed dog vertical movement mechanism and a settlement mechanism in a normal mode.

FIG. 2B is a front view showing the configuration of the feed dog vertical movement mechanism and the settlement mechanism in the normal mode.

[FIG. 2C] FIG. 2C is a side view showing the configuration of the feed dog vertical movement mechanism and the subsidence mechanism when the feed dog is raised in the normal mode.

[FIG. 2D] FIG. 2D is a side view showing the configuration of the feed dog vertical movement mechanism and the subsidence mechanism when the feed dog is lowered in the normal mode.

FIG. 3A is a plan view showing a configuration of a feed dog vertical movement mechanism and a settlement mechanism in an embroidery mode.

FIG. 3B is a front view showing a configuration of a feed dog vertical movement mechanism and a settlement mechanism in an embroidery mode.

[FIG. 3C] FIG. 3C is a side view showing the configuration of the feed dog vertical movement mechanism and the sink mechanism in the sunk state of the feed dog in the embroidery mode.

[FIG. 3D] FIG. 3D is a side view showing the structure of the feed dog vertical movement mechanism and the subsidence mechanism when the lower shaft is in a different phase in the embroidery mode.

FIG. 4 is a plan view of the embroidery device.

FIG. 5 is a front view of the embroidery device.

FIG. 6A is a plan view showing the configuration of the mode switching mechanism and the selection switching mechanism in a state corresponding to the embroidery mode.

[FIG. 6B] FIG. 6B is a longitudinal front view taken along line 6B-6B of FIG. 6A.

FIG. 7A is a plan view showing the configuration of the mode switching mechanism and the selection switching mechanism in a state corresponding to the normal mode.

[FIG. 7B] FIG. 7B is a longitudinal front view taken along the line 7B-7B of FIG. 7A.

FIG. 8 is an enlarged plan view of the main part of the mode switching mechanism.

[FIG. 9] FIG. 9 is a longitudinal sectional side view taken along line 9 9 in FIG. [FIG. 10] FIG. 10 is a longitudinal side view taken along line 10-10 of FIG. 6A.

FIG. 11 is a control block diagram of the main part.

[FIG. 12A] FIG. 12A is a front view showing a state of a feed dog vertical movement mechanism and a subsidence mechanism during attachment of the embroidery device to the free arm.

[FIG. 12B] FIG. 12B is a front view showing the states of the feed dog vertical movement mechanism and the subsidence mechanism during the attachment of the embroidery device to the free arm.

FIG. 13A is a front view showing a state of a feed dog vertical movement mechanism and a settlement mechanism when the embroidery device is mounted.

FIG. 13B is a front view showing the states of the feed dog vertical movement mechanism and the settlement mechanism when the embroidery device is mounted.

[FIG. 14A] FIG. 14A is a front view showing a state of the feed dog vertical movement mechanism and the lowering mechanism when the mode switching mechanism is switched from the embroidery mode to the normal mode.

FIG. 14B is a front view showing a state of the feed dog vertical movement mechanism and the settlement mechanism in a state where the embroidery mode force is also switched to the normal mode by the mode switching mechanism.

FIG. 15A is a cross-sectional plan view of the embroidery device showing the configuration of the operating mechanism and the locking mechanism.

FIG. 15B is a longitudinal front view taken along line 15B-15B in FIG. 15A.

Explanation of symbols

[0013] M is a sewing machine, 1 is a sewing machine bed, la is a free arm, lb is a needle plate, 10 is a feed dog vertical movement mechanism, 11 is a lower shaft, 12 is a vertical feed cam, 12a is an eccentric cam, and 12b is Concentric cam section, 13 feed dog, 18 vertical feed contact, 20 feed dog sinking mechanism, 21 contact moving member, 22 manual switching lever, 30 embroidery device, 31 body case, 31e switch Inclined cam (switching member), 33 is an embroidery frame, 35 is a mode switching mechanism (mode switching means), 36 is a manual operation lever, 37 is an operating mechanism, 38 is a detection switch (detecting means), 47 is an operating plate, 50 Is a selection switching mechanism (selection switching means), 51 is a lock mechanism, 52 is a lock release lever, and 65 is a control unit (control unit).

BEST MODE FOR CARRYING OUT THE INVENTION

[0014] In order to describe the present invention in more detail, it will be described with reference to the accompanying drawings. The drawings show one embodiment of the present invention. FIG. 1 shows a state where the embroidery device 30 force S sewing machine M according to the present embodiment is mounted. The sewing machine M is similar to a general household electronic control sewing machine. First, the configuration of the sewing machine M will be described. In the figure, the arrow F indicates the front.

[0015] The sewing machine M includes a sewing machine bed portion 1, a leg column portion 2 that rises upward from the right end portion of the sewing bed portion 1, and an arm portion 3 that extends leftward from the upper end of the leg column portion 2 in the drawing. Are integrally formed. The tip of the sewing machine bed 1 is a free arm la that can be sewn on a cylindrical work cloth. Further, a lower shaft 1 1 (see FIG. 2A and the like) is provided in the sewing machine bed 1 (free arm la).

A needle bar 5 having sewing needles 4 is provided at the lower end of the arm portion 3 at the tip. A needle plate lb corresponding to the needle bar 5 is provided on the upper surface of the free arm la. Although not shown in detail, within the free arm la, the feed dog vertical movement mechanism 10 that moves up and down the feed dog 13 (see FIG. Teeth back-and-forth movement mechanism, feed dog settling mechanism 20, horizontal rotary hook 9 (see Fig. 2C) that accommodates the bobbin bobbin and forms the seam in cooperation with the sewing needle 4, and the thread trimming mechanism are provided as a unit It has been. The feed dog vertical movement mechanism 10 and the horizontal rotary hook 9 are driven in conjunction with the lower shaft 11. Details of the feed dog vertical movement mechanism 10 and the feed dog lowering mechanism 20 will be described later.

[0017] Although not shown in the figure, the arm portion 3 is provided with a sewing machine spindle in the left-right direction that is driven to rotate by a sewing machine motor. Further, in the arm portion 3, a needle bar drive mechanism for moving the needle bar 5 up and down, a needle bar swinging mechanism for swinging the needle bar 5 in a direction perpendicular to the cloth feeding direction (left and right direction), and a balance with a needle A scale drive mechanism that moves up and down in synchronization with the up and down movement of the rod 5 is provided. Each of these mechanisms is driven in conjunction with the sewing machine spindle. In addition, the lower shaft 11 is also driven to rotate in synchronization (synchronization) with the sewing machine spindle by the sewing machine motor! / Speak.

On the front surface of the pedestal 2, there is provided a liquid crystal display 6 that is large and has a vertically long shape and capable of full color display. The display 6 displays various stitch patterns such as practical sewing and embroidery patterns, function names for executing various functions necessary for the sewing work, and various messages. The surface of this display 6 A known touch panel is provided as much as possible. Further, a hand pulley 7 for manually rotating the sewing machine main shaft is provided on the right side surface portion of the arm portion 3. Various switches such as a start / stop switch 8 for instructing start and stop of the sewing work are provided on the front side of the arm portion 3.

[0019] As a result, each mechanism is driven in conjunction with the sewing machine spindle that is rotationally driven by the sewing machine motor, whereby a sewing operation is performed. At this time, in a state where the embroidery device 30 is not attached, in the normal mode, while the work cloth on the sewing machine bed 1 is fed by the vertical movement and the forward / backward movement of the feed dog 13, the main sewing, zigzag sewing, Etc. Practical sewing! Even when the embroidery device 30 is not attached, it is possible to perform a sewing operation (with quilting buttons, etc.) without performing the cloth feed by the feed dog 13 by operating the manual switching operation lever 22 described later. It has been.

[0020] An embroidery device 30 according to this embodiment is detachably attached to the left end portion of the sewing machine bed 1 (free arm la). The embroidery device 30 has an embroidery frame 33 (see FIGS. 4 and 5) holding a work cloth (not shown) on the upper surface of the sewing machine bed 1 in the X direction (left-right direction) and Y direction (front-back direction). It is for executing embroidery sewing by moving it freely.

As shown in FIGS. 4 and 5, the embroidery device 30 includes a main body case 31 and a movable case 32 provided on the upper surface of the main body case 31 so as to be movable in the X direction. . As shown in FIG. 9, the main body case 31 is configured by a lower case 31A and an upper case 31B that face each other, and has a thin rectangular box shape as a whole. In addition, a bed accommodating portion 31d (see FIG. 6A and the like) into which the free arm la is relatively fitted when mounted is formed on the right half of the main body case 31. Further, a connector portion 30 a for electrical connection with the sewing machine M is provided at the right end portion of the main body case 31. When the embroidery device 30 is mounted, the upper surface of the main body case 31 is at the same height as the upper surface (bed surface) of the sewing machine bed 1 and the connector 30a is connected to the control unit 65 of the sewing machine M (see Fig. 11). You will be!

[0022] The movable case 32 has a rectangular box shape elongated in the front-rear (Y) direction, and an embroidery frame 33 is detachably mounted on the right side surface thereof, and the carriage moves the embroidery frame 33 in the Y direction. 32a is provided. Although not shown, an X feed motor and an X direction drive mechanism for driving the movable case 32 in the X direction are provided in the main body case 31. In the movable case 32, a Y feed motor and a longitudinal direction drive mechanism for driving the carriage 32a in the Y direction are provided. Thus, an embroidery frame feed mechanism for moving the embroidery frame 33 freely in the X direction and the Y direction is configured.

[0023] By setting the embroidery mode in a state where the embroidery device 30 is mounted on the sewing machine bed portion 1, the feed dog 13 is held in a lowered state below the needle plate lb. In this state, the embroidery frame 33 is controlled to move in the X direction and the Y direction based on the embroidery data and the like, so that the embroidery sewing operation for the work cloth held in the embroidery frame 33 is executed. It is. At this time, as will be described later, the embroidery device 30 is provided with a lock mechanism 51 for locking the embroidery device 30 in a state of being attached to the sewing machine bed 1. In addition, when the user (sewing manufacturer) removes the embroidery device 30 from the sewing machine bed 1, a lock release lever 52 is also provided for releasing the lock!

Even when the embroidery device 30 is mounted, the user can switch from the embroidery mode to the normal mode by operating a manual operation lever 36 described later. At this time, for example, practical sewing can be performed using the main body case 31 as an auxiliary bed with the embroidery frame 33 removed.

Here, the configurations of the feed dog vertical movement mechanism 10 and the feed dog settling mechanism 20 provided in the sewing machine bed 1 will be described with reference to FIGS. 2A to 2D and FIGS. 3A to 3D. First, the feed dog vertical movement mechanism 10 will be described.

[0026] In the free arm la, a lower shaft 11 is provided extending in the left-right direction. A vertical feed cam 12 is fixed to the lower shaft 11, and a longitudinally moving cam 19 including an eccentric cam is fixed to the right side thereof. The vertical feed cam 12 has an eccentric cam portion 12a for moving the feed dog 13 up and down, and a concentric cam portion 12b for positioning the feed dog 13 in the subsidence position on the right side. It is configured. The radius of the cam surface of the concentric cam portion 12b is the same as the minimum radius of the cam surface of the eccentric cam portion 12a, and the concentric cam portion 12b is longer and dimensioned in the axial direction !, The

[0027] On the other hand, the feed dog 13 is fixed to the upper surface of the feed base 14, and a plurality of needles lb formed on the needle plate lb. Can move up and down between a cloth feed position (see Fig. 2C, etc.) protruding above the needle plate lb from a square hole (not shown) and a sinking position below the needle plate 1b (see Fig. 2D, etc.) Is provided. On the front end side of the feed base 14, as shown in FIGS. 12A, 13A and the like, a pair of arm portions 14a extending forward from the left and right are provided on the body. These arm portions 14a are opened so as to turn left and right so as to avoid the horizontal rotary hook 9, and the front end portions thereof are rotatably connected to the upper end portions of the pair of left and right front and rear swing levers 24, respectively.

The front / rear swing lever 24 is swung back and forth by a feed dog forward / backward movement mechanism (not shown) via the front / rear movement cam 19. As a result, the feed base 14 and thus the feed dog 13 are moved back and forth. As shown in FIGS. 2B, 2C, etc., a height adjusting bolt 15 is provided at the rear end portion of the feed base 14, and the lower end portion of the height adjusting bolt 15 is an up / down moving pin. It is in contact with the upper end of 16. The rear end of the feed base 14 is always urged downward by a tension spring (not shown).

[0029] As shown in FIGS. 2C, 2D, etc., a cam shaft 17 is disposed on the rear side of the lower shaft 11 in parallel with the lower shaft 11. A child 18 is provided to be slidable in the left-right direction. A cam contact 18a is formed at the front end of the vertical feed contact 18, and a contact portion 18b is formed at the rear end. At this time, the vertical feed contact 18 is always biased leftward (on the side in contact with the eccentric cam portion 12a) by a compression coil spring (not shown).

[0030] The cam contact 18a is selectively in contact with the eccentric cam portion 12a or the concentric cam portion 12c. The abutting portion 18b abuts on the lower end of the vertical movement pin 16 from below. Thus, the contact state between the lower end of the height adjusting bolt 15 and the upper end of the vertical movement pin 16, the contact state between the lower end of the vertical movement pin 16 and the contact part 18b, and the cam contact 18a. And the contact state of the eccentric cam portion 12a (or the concentric cam portion 12c).

[0031] At this time, in a state where the cam contact 18a is in contact with the eccentric cam portion 12a, as shown in FIG. 2D, the cam contact 18a is in contact with the side of the eccentric cam portion 12a having a small radius. Sometimes, the vertical movement pin 16 is in the lowered position and the feed dog 13 is on the lower side. As shown in FIG. 2C, when the cam contactor 18a comes into contact with the large radius side of the eccentric cam portion 12a, In this case, the vertical feed contact 18 rotates, the vertical movement pin 16 rises, and the feed dog 13 also rises.

[0032] When the lower shaft 11 is rotationally driven in a predetermined rotational direction (arrow A direction), the cam contact 18a swings up and down by the rotation of the eccentric cam portion 12a. As a result, the vertical movement pin 16 moves up and down via the vertical feed contact 18 and the rear end of the feed base 14 moves up and down in conjunction with each other, so that the feed dog 13 has the cloth feed position shown in FIG. Move up and down to the subsidence position shown in Figure 2D. In synchronism with this, the feed dog 13 moves back and forth by the rotational drive of the longitudinal cam 19 to feed the cloth. Therefore, the normal mode is set when the cam contact 18a is in contact with the eccentric cam portion 12a.

[0033] Next, the feed dog lowering mechanism 20 for switching to the embroidery mode in which the feed dog 13 is held in the lowering position below the needle plate lb is provided in addition to the feed dog vertical movement mechanism 10 described above. A contact moving member 21 for moving the feed contact 18 in the left-right direction is provided. As shown in FIGS. 2B, 3B, etc., this contact moving member 21 has a plate member force that is long to the left and right, and has a pressing portion disposed on the left side of the vertical feed contact 18 at the left end thereof. is doing.

[0034] The contact moving member 21 is positioned behind the vertical feed contact 18 and is movable in the left-right direction while being held in a vertical posture by a support member (not shown). At this time, the contact moving member 21 is formed with two horizontally long cutouts 21a and 21b, and the pin 25 is inserted into each of the cutouts 21a and 21b. It can be moved in the left-right direction within the range in which the pin 25 is relatively movable in the notches 21a and 21b.

Thus, the contact moving member 21 can move to the left and right between the left non-contact position (see FIG. 12B, etc.) and the right contact position (see FIG. 13B, etc.). Further, an engaging projection 21c that protrudes downward from the bottom surface of the free arm la is provided below the contact moving member 21. The contactor moving member 21 is positioned at the left non-contact position in a normal state, that is, in a state where no force is applied from the outside. As will be described in detail later, the vertical switching contact 18 is moved to the right by the mode switching mechanism 35 provided in the embroidery device 30 being moved to the right contact position via the engagement protrusion 21c. To move to embroidery mode. [0036] Further, in this embodiment, a manual switching operation lever 22 is provided on the rear surface side of the free arm la to switch the mode by directly moving the upper / lower feed contact 18 by manual operation. Provided. That is, as shown in FIG. 2A, FIG. 2B, FIG. 3A, FIG. 3B, etc., the manual switching operation lever 22 is configured in a substantially crank shape in plan view, It is pivotally supported. At the left end of the manual switching operation lever 22, there is provided an operation portion 22b that can be operated from the rear side of the free arm la, and at the right end is a cylindrical contact that abuts on the vertical feed contact 18 with a leftward force. A contact 22a is provided.

[0037] When the manual switching operation lever 22 is in the inoperative position (non-actuated state) shown in Fig. 2B, the vertical feed contact 18 is attached to the left by the spring force of the compression coil spring. And the normal mode in which the eccentric cam portion 12a is contacted is set. In this state, the contact moving member 21 can move the vertical feed contact 18 to the right (switch to the embroidery mode).

[0038] On the other hand, when the user turns the manual switching operation lever 22 to move it to the lock position (locked state) shown in FIG. 3B, the contact portion 22a compresses the vertical feed contact 18. It is piled on the spring force of the coil spring and moved rightward so that the cam contact 18a can be switched to a state (embroidery mode) in contact with the concentric cam portion 12c. At this time, the vertical feed contact 18 is locked at that position, and the vertical feed contact 18 cannot be moved via the contact moving member 21. Therefore, in order for this state force to return the feed dog 13 to the normal mode, the manual switching operation lever 22 needs to be rotated to the inoperative position.

[0039] The embroidery device 30 according to the present embodiment has a mode switching mechanism as mode switching means for selectively switching between the normal mode and the embroidery mode in a state of being mounted on the free arm la. 35 is provided. Hereinafter, the mode switching structure 35 will be described with reference to FIGS. 6A, 6B, 7A, 7B, 8, 9, and the like.

[0040] This mode switching mechanism 35 transmits a manual operation lever 36 operated by the user for switching between the normal mode and the embroidery mode, and the operation of the manual operation lever 36 to the contact moving member 21. And an operating mechanism 37. In this embodiment, manual operation is performed. A detection switch 38 is provided as a detection means for detecting the switching position of the operation lever 36.

[0041] First, the operating mechanism 37 will be described. As shown in FIG. 6A, FIG. 7A, etc., the bed housing portion 3 is formed on the rear side of the right half of the lower case 31A of the main body case 31 by partition walls 31a to 31c that are U-shaped as a whole. Id is formed. A switching inclination cam 31e as a switching member for switching the manual switching operation lever 22 to the inoperative position is formed at the center in the left-right direction of the rear partition wall 31a forming the bed accommodating portion 31d.

[0042] As shown in FIGS. 8 and 9, a base plate 40 is provided on the bottom wall portion of the right end portion of the front side of the bed accommodating portion 31d in the lower case 31A, as shown in FIG. 9 (shown only in FIG. 9). Is fixed horizontally. The manual operation lever 36 has a substantially "<" shape in plan view, and is attached to the base plate 40 by a pivot pin 42 via a spacer 41 at the center in the length direction. ing. Further, a swinging member 43 having a substantially bifurcated shape in a plan view is pivotally supported on the base plate 40 so as to be rotatable by a pivot pin 44 around the curved portion.

[0043] The front end side of the manual operation lever 36 extends upward, and an operation knob 36a is fixed to the front end thereof. As shown in FIGS. 1 and 5 and the like, the operation knob 36a is arranged so that the opening force of the main body case 31 protrudes forward, and can be slid (rotated) left and right by the user. The rear end portion of the manual operation lever 36 is rotatably connected by a connecting pin 45 in the middle portion of the swing member 43 (front side of the pivot portion by the pivot pins 44).

At this time, two notches 36b (only one is shown in FIGS. 8 and 9) are formed on the rear side of the manual operation lever 36. A positioning plate 46 made of leaf spring material is attached to the front end of the base plate 40 on the right end side. A left end side 46a of the positioning plate 46 is positioned on the upper surface of the manual operation lever 36, and a downward projection 46b that can be engaged with the notch 36b is formed on the lower surface thereof. As a result, the protrusion 46b engages with the left and right cutouts 36b, whereby a detent mechanism is formed, and the manual operation lever 36 is positioned. In this case, as shown in FIG. 7, the state in which the operation knob 36a is rotated to the right is the normal operation position corresponding to the normal mode. As shown in FIG. 6, the state in which the operation knob 36a is rotated to the left is the embroidery operation position corresponding to the embroidery mode.

[0045] On the other hand, as shown in FIGS. 12 to 15 and the like, the inner bottom portion of the lower case 31A is elongated in the front-rear direction so as to cross the center of the bed storage portion 3 Id slightly to the right and back! A thin plate-like operation plate 47 is provided so as to be slidable in the front-rear direction. The most part of the operating plate 47 except the rear end portion is a non-operating plate portion 47a having a small left-right width dimension, and the rear end portion has a left-right width dimension via an operating inclined cam portion 47b. A large working plate portion 47c is formed. As shown in FIG. 8 and the like, the front end portion of the operating plate 47 is connected to the tip end portion of the first arm portion 43a of the swing member 43 via a connecting pin 48.

[0046] From this point, as shown in FIGS. 6A and 8, in the embroidery operation position where the operation knob 36a is operated to the left, the manual operation lever 36 rotates clockwise in plan view around the pivot pin 42. Therefore, the swing member 43 rotates counterclockwise around the pivot pin 44 via the connecting pin 45 in plan view. Since the tip end portion of the first arm portion 43a of the swing member 43 moves forward, the operation plate 47 moves forward. At this time, the operation plate portion 47c of the operation plate 47 is located at the rear end portion in the bed accommodating portion 31d. In this state, the actuating plate portion 47c of the actuating plate 47 abuts the left side surface of the engaging projection portion 21c projecting downward from the contact moving member 21, and the contact moving member 21 is moved to the right contact position. To move to. Accordingly, the state of the feed dog 13 is switched to the embroidery mode.

[0047] On the other hand, as shown in FIG. 7A, in the normal operation position where the operation knob 36a is operated to the right, the manual operation lever 36 rotates counterclockwise around the pivot pin 42 in plan view. Therefore, the swinging member 43 rotates clockwise around the pivot pin 44 via the connecting pin 45 in a plan view, and the distal end portion of the first arm portion 43a moves rearward so that the operating plate 47 Move backward. At this time, the working plate portion 47c of the working plate 47 is retracted to the rear of the bed housing portion 31d, and the non-working plate portion 47a is positioned over the entire bed housing portion 3Id. In this state, the actuating plate 47 does not move the engaging protrusion 21c, so the contactor moving member 21 is held at the left non-contact position, and the state of the feed dog 13 is switched to the normal mode.

[0048] When the embroidery device 30 is mounted on the sewing machine bed portion 1, the embroidery device 30 is slid rightward so that the free arm la is relatively fitted into the bed accommodating portion 31d. At this time, Even when the manual switching lever 22 on the M side is in the locked position, as shown in FIGS. 12A and 12B, the operating portion 22b of the manual switching lever 22 is connected to the inclined cam surface 3 If of the switching inclined cam 3 le. 13A and 13B, the operation portion 22b is forcibly moved upward, and the manual switching operation lever 22 is switched to the non-operating position. In addition, when the embroidery device 30 is mounted on the sewing machine bed 1, the user cannot operate the manual switching operation lever 22.

As shown in FIG. 8 and the like, the detection switch 38 has a microswitch force, for example, and is provided at the rear end portion of the base plate 40. At this time, an operating portion 43c protruding rightward is provided at the rear end portion of the second arm portion 43b of the swing member 43. The operating portion 43c is separated from the detection switch 38 when the manual operation lever 36 is in the embroidery operation position also shown in FIG. 6A. Then, when the manual operation lever 36 is moved to the normal operation position shown in FIG. 7A, the operation portion 43c is configured to press the operation portion 38a of the detection switch 38 by the rotation of the swing member 43! RU

At this time, as shown in FIG. 11, from this detection switch 38, for example, a control device that is a control device for the normal mode signal force sewing machine M that is switched from the “H” level signal to the “L” level signal. Output to unit 65. On the other hand, when the manual operation lever 36 is switched to the embroidery operation position, the detection switch 38 outputs an “H” level signal. The control unit 65 is composed of a microcomputer including a CPU 66, a ROM 67, a RAM 68, and the like, and functions as a control unit that controls the sewing machine M and the embroidery device 30 as a whole. The control unit 65 controls the operation of the sewing machine M based on the position detection signal of the manual operation lever 36 from the detection switch 38! /.

[0051] Furthermore, the embroidery device 30 is provided with a lock mechanism 51 for locking the embroidery device 30 in a state where it is mounted on the free arm la, a lock release lever 52 for releasing the lock of the lock mechanism 51, and the like. ing. First, the lock mechanism 51 will be described. As shown in FIGS. 6A, 6B, 7A, 7B, 10 and the like, a hook that is substantially L-shaped when viewed from the front is provided on the left side of the partition wall 31b that partitions the bed accommodating portion 31d. A member 55 is provided. As shown in FIG. 10, the hook member 55 is pivotally supported by a pair of front and rear pivot wall portions 31g on the upper side of the vertical portion. An engaging hook 55 is attached to the horizontal end of the hook member 55 (the right end). a is formed, and a housing recess 31h recessed downward is formed in the bottom wall portion of the lower case 31A corresponding to the lower side of the engagement hook 55a.

[0052] As shown in FIGS. 6B, 7B, etc., an inclined tension coil spring 56 is stretched over the upper end portion of the hook member 55 and the bottom wall portion of the lower case 31A. Therefore, the hook member 55 is always urged counterclockwise by the spring force of the tension coil spring 56, and the engagement hook 55a faces the lower part of the bed accommodating portion 31d.

[0053] When the embroidery device 30 is mounted on the free arm la, the engaging hook 55a is moved downward so as to sink into the housing recess 31h by the inclined surface of the hooked portion lc formed on the free arm la. As shown in FIG. 6B, the engagement hook 55a returns upward and engages the hooked portion lc from the lower right side. As a result, the embroidery device 30 is locked in a state where it is mounted on the free arm la.

[0054] On the other hand, as shown in FIGS. 6B, 7B, etc., the lower case 31A is located at the left end on the left side of the bed accommodating portion 31d and is largely recessed upward (lower side). Force Opening left) The handle receiving recess 3li is formed. The lock release lever 52 is provided so as to extend in the left-right direction to the vicinity of the handle accommodating recess 31i partial force bed accommodating portion 31d. The mouth release lever 52 is formed with a release operation portion 52a that is bent downward and rightward at the left end portion thereof, and a connection portion 52b is formed at the right end portion thereof. . The connecting portion 52 b is connected by a connecting pin 57 at the lower end portion of the vertical portion of the hook member 55. The release operation part 52a is arranged in the handle housing recess 3li, and the user can insert the hand and pull it to the left.

[0055] When the user pulls the release operation unit 52a leftward, as shown in FIG. 15B, the hook member 55 rotates clockwise in front view. As a result, the engagement hook 55a is retracted into the lower receiving recess 3lh, the engagement between the engagement hook 55a and the hooked portion lc is released, and the lock of the lock mechanism 51 is released. Therefore, the user can remove the embroidery device 30 from the free arm la as it is. When the user releases the tensile force of the release operation portion 52a, the hook member 55 returns to the original position by the spring force, and the lock release lever 52 also returns to the original position accordingly.

[0056] In the present embodiment, the embroidery device 30 is provided with the embroidery device 30 when it is removed from the sewing machine bed portion 1. A selection mechanism 50 is provided as selection switching means for switching the mode switching mechanism 35 to the embroidery mode side in conjunction with the removal operation, that is, forcibly switching the manual operation lever 36 to the embroidery operation position. In this embodiment, the selection mechanism 50 is configured to switch the manual operation lever 36 to the embroidery operation position in conjunction with the operation of the lock release lever 52.

That is, as shown in FIG. 6A, FIG. 7A, FIG. 10, and FIG. 15A, a crank-like turning lever 58 is provided on the support wall 31j immediately in front of the hook member 55 with a screw 59 (FIG. (See 10) and is pivotally supported. As shown in FIG. 10, the first connecting portion 58 a of the rotating lever 58 is engaged with the upper end portion of the hook member 55. On the other hand, as shown in FIG. 8 and the like, a switching lever 60 is provided between the pivoting lever 58 and the swinging member 43, and the right end of the switching lever 60 is the swinging member 43. The second arm portion 43b is connected to the tip of the second arm portion 43b by a connecting pin 61. Then, as shown in FIG. 6A and the like, a connecting pin 62 is fixed to the second connecting portion 58b of the rotating lever 58, and the connecting pin 62 is formed at the left end portion of the switching lever 60. It is connected to the notch hole 60a.

[0058] Thereby, when the lock mechanism 51 is released by the lock release lever 52, the rotation lever 58 interlocked with the hook member 55 rotates clockwise in plan view and is switched via the connecting pin 62. Move lever 60 to the left. As a result, since the second arm portion 43b of the swing member 43 is pulled to the left, the swing member 43 rotates counterclockwise, and the manual operation lever 36 is forcedly moved as shown in FIG. It can be switched to the left embroidery position. However, when the manual operation lever 36 is switched, even if the switching lever 60 moves to the left or right in conjunction with the pivoting of the swinging member 43, the locking mechanism 51 force unlocking side is provided by the oval notch 60a. There is no such thing as working.

Next, the operation of the above configuration will be described.

When the embroidery device 30 is detached from the sewing machine bed 1, the sewing machine M alone can execute sewing operations for practical sewing such as main sewing and zigzag sewing. At this time, as shown in FIGS. 2A to 2D and the like, the manual switching operation lever 22 is in the inoperative position and the feed dog 13 is set to the normal mode, so that the feed dog 13 is moved up and down (and moved back and forth). The sewing operation is executed while the cloth is fed. Even when the embroidery device 30 is not attached, As shown in FIGS. 3A to 3D, the user can switch the feed dog 13 to the embroidery mode by operating the manual switching operation lever 22 to the locked position. In this embroidery mode, the feed dog 13 does not protrude onto the needle plate lb and the cloth feed is not performed, so that operations such as button attachment and quilting can be performed.

[0060] On the other hand, when the user executes embroidery sewing !, etc., the embroidery device 30 is mounted on the sewing machine bed section 1. As described above, when the embroidery device 30 is attached, when the manual switching operation lever 22 is in the locked position, it is forcibly returned to the inoperative position by the switching tilt cam 31e. The embroidery device 30 is locked to the free arm la by the lock mechanism 51.

[0061] When the embroidery device 30 is mounted, the manual operation lever 36 is positioned at the embroidery operation position (the operation knob 36a is on the left side) as shown in FIGS. The plate portion 47c moves the contact moving member 21 to the right contact position, and the feed dog 13 is set in the embroidery mode. In this state, embroidery stitching can be performed while moving the embroidery frame 33 holding the work cloth that does not obstruct the feed dog 13.

[0062] Even when the embroidery device 30 is mounted, as shown in FIG. 7A and the like, the user operates the operation knob 36a to the right to switch the manual operation lever 36 to the normal operation position. Moves backward and does not press the contact moving member 21, so that the feed dog 13 is switched to the normal mode. In this state, for example, by removing the embroidery frame 33 from the embroidery device 30, as shown in FIG. 1, the main body case 31 is used as an auxiliary bed (with the sewing machine bed portion 1 being expanded), and the cloth feed by the feed dog 13 is performed. It is possible to carry out practical sewing involving. The user can switch the feed dog 13 to the embroidery mode again by switching the manual operation lever 36 from the normal operation position to the embroidery operation position.

Note that a signal from the detection switch 38 that detects the position of the manual operation lever 36 is output to the control unit 65 of the sewing machine M. In the control unit 65, the pattern selection control and the sewing control can be appropriately switched according to the mode of the feed dog 13 based on the signal from the detection switch 38, so that the optimum control is executed. Become.

[0064] Here, in the embroidery device 30 at the time of mounting (before mounting), if the manual operation lever 36 is in the normal operation position, the user tries to execute embroidery sewing and the embroidery device 30 Even if is attached to the sewing machine bed 1, the mode of the feed dog 13 is set to the normal mode. Therefore, the user needs to check the force in which mode the feed dog 13 is currently in (the force that the manual operation lever 36 is in), and switch to the embroidery operation position in the normal mode. There is. Otherwise, if the embroidery sewing is started without confirmation, the feed dog 13 will move up and down in the normal mode, and the thread on the lower surface of the work cloth will be hooked on the feed dog 13, etc. May not be able to be performed successfully.

However, in this embodiment, when the embroidery device 30 is detached from the sewing machine bed 1, the mode switching mechanism 35 is moved to the embroidery mode side in conjunction with the removal operation, that is, manually. Since the selection mechanism 50 for forcibly switching the operation lever 36 to the embroidery operation position is provided, it is possible to prevent the occurrence of the above problems.

That is, when removing the embroidery device 30 from the free arm la, the user pulls the lock release lever 52 to the left by placing his / her finger on the veg release operation portion 52a for releasing the lock state by the lock mechanism 51. To do. Then, as shown in FIG. 15A, the locked state of the engaging hook 55a and the hooked portion lc is released, and the rotating lever 58, the switching lever 60, and the swinging member 43 linked to the hook member 55 are used. Thus, the manual operation lever 36 is forcibly switched to the embroidery operation position.

Accordingly, in a state where the embroidery device 30 is detached from the free arm la, the manual operation lever 36 is always located at the embroidery operation position. As a result, even if the mode of the feed dog 13 on the sewing machine M is in any state, the mode switching mechanism 35 of the embroidery device 30 will automatically perform the next time the embroidery device 30 is mounted on the sewing machine bed 1. Thus, the state of the feed dog 13 can be switched to the embroidery mode. Therefore, the user does not need to check the position of the manual operation lever 36 (the feed dog 13 mode), and does not need to switch the manual operation lever 36 to the embroidery operation position. Once installed, embroidery can be started as is.

As described above, according to the present embodiment, the embroidery apparatus 30 is provided with the mode switching mechanism 35 that also has the manual operation lever 36 for switching the mode of the feed dog 13 on the sewing machine M side. Thus, when the embroidery device 30 is removed from the sewing machine bed 1, the manual operation lever 36 is forcibly moved to the embroidery operation position on the embroidery mode side in conjunction with the removal operation. A replacement mechanism 50 was provided. As a result, when the user attaches the embroidery device 30 to the sewing machine bed 1 to perform embroidery stitching, the mode is automatically switched to the embroidery mode for the feed dog 13, which is troublesome for the user. An excellent effect can be obtained in that embroidery sewing can be started promptly without forcing operation.

[0069] Further, in the present embodiment, in particular, the manual operation lever 36 is switched to the embroidery operation position in conjunction with the operation of the lock release lever 52 for releasing the lock state of the lock mechanism 51. The selection mechanism 50 can be realized simply by adding a plurality of levers such as the interlocking rotation lever 58 and switching lever 60. As a result, the configuration of the selective switching mechanism 50 can be completed relatively easily, but the advantages of the selective cut-off mechanism 50 can be obtained when the operation of the selective cut-out mechanism 50 is reliably performed.

It should be noted that the present invention is not limited to the above-described one embodiment, and those skilled in the art can implement the present invention with various modifications without departing from the spirit of the present invention. The present invention includes such modifications.

Industrial applicability

As described above, the embroidery device that can be attached to the sewing machine bed according to the present invention is useful when the embroidery device is detachably attached to the sewing machine bed to perform embroidery sewing.

Claims

The scope of the claims

[1] Normal mode in which sewing operation is performed while moving the feed dog (13) provided on the sewing machine bed (1) up and down, and the feed dog (13) sinks below the needle plate (lb). An embroidery frame (33) that is detachably mounted on the machine bed (1) of the sewing machine (M) that can be executed in the embroidery mode in which the sewing operation is performed while holding the work cloth, and that holds the work cloth. In the embroidery device (30) that can be mounted on a sewing machine bed portion that is configured to include an embroidery frame feed mechanism that moves the feed dog (13) in the normal mode while mounted on the sewing machine bed portion (1). Mode switching means (35) for selectively switching between the embroidery mode and the embroidery mode;

Sewing machine comprising: selection switching means (50) for bringing the mode switching means to the embroidery mode side in conjunction with the removal operation when the sewing bed is removed from the sewing machine bed (1). Embroidery device that can be attached to the bed.

[2] The embroidery device that can be mounted on the sewing machine bed of claim 1,

The sewing bed part (1) is provided with a feed dog subsidence mechanism (20) that moves the feed dog (13) to a subsidence position below the needle plate (lb).

The mode switching means (35) operates the feed dog subsidence mechanism (20).

[3] The embroidery device that can be attached to the sewing machine bed of claim 2,

The feed dog subsidence mechanism (20) includes an eccentric cam part (12a) for moving the feed dog (13) up and down and a concentric cam part (12b) for maintaining the feed dog (13) in the subsidence position. A vertical feed cam (12) fixed to the lower shaft (11), a vertical feed contact (18) that contacts either the eccentric cam portion (12a) or the concentric cam portion (12b), A contact moving member (21) for moving the vertical feed contact (18), and the mode switching means (35) is configured to move the contact moving member (21). It is characterized by that.

[4] The embroidery device that can be mounted on the sewing machine bed of claim 3,

The mode switching means (35) includes a manual operation lever (36) operated for switching between the embroidery mode and the normal mode, and the operation of the manual operation lever (36) to the contact moving member (21). And an actuating mechanism (37) for transmitting.

[5] The embroidery device that can be mounted on the sewing machine bed according to claim 4, A lock mechanism (51) for locking the sewing machine bed (1) in a mounted state; and a lock release lever (52) for releasing the lock by the lock mechanism (51),

The selection switching means (50) is configured to switch the manual operation lever (36) to a position corresponding to the embroidery mode in conjunction with the operation of the lock release lever (52). To do.

[6] The embroidery device that can be mounted on the sewing machine bed according to claim 4,

Detection means (38) for detecting the position of the manual operation lever (36) is provided, and information on the position of the manual operation lever (36) detected by the detection means (38) is obtained from the control unit of the sewing machine (M). (65) is configured to be output.

[7] The embroidery device that can be mounted on the sewing machine bed of claim 3,

The sewing bed portion (1) has a locked state in which the vertical feed contact (18) is brought into contact with the concentric cam portion (12b) and locked to the state in which the eccentric cam portion 12a cannot move, and the vertical feed A manual switching operation lever (22) is provided for switching between a non-operating state that makes the contactor (18) movable,

A switching member (31e) is provided for switching the manual switching operation lever (22) to an inoperative state in conjunction with the mounting operation when the sewing machine bed (1) is mounted.