EP2518200A2 - Sewing machine embroidery presser and sewing machine - Google Patents
Sewing machine embroidery presser and sewing machine Download PDFInfo
- Publication number
- EP2518200A2 EP2518200A2 EP20120165469 EP12165469A EP2518200A2 EP 2518200 A2 EP2518200 A2 EP 2518200A2 EP 20120165469 EP20120165469 EP 20120165469 EP 12165469 A EP12165469 A EP 12165469A EP 2518200 A2 EP2518200 A2 EP 2518200A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- presser
- embroidery
- needle
- holder
- sewing machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/12—Presser-foot attachment
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/06—Presser feet
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C7/00—Special-purpose or automatic embroidering machines
- D05C7/02—Special-purpose or automatic embroidering machines with accessories for peculiar kinds of embroidery
Definitions
- This disclosure relates to an embroidery presser attached to a vertically-movable presser bar in a sewing machine and a sewing machine.
- JP2005-58360A discloses a cloth pressing mechanism of an embroidery sewing machine.
- This cloth presser includes a presser bar, a support member fixed to the presser bar, a presser foot member having a guide target shaft vertically movably supported by the support member and a presser foot, a vertical driving lever swingably supported by the support member through a pivot pin, and a compression coil spring fitted to an outer edge side of the guide target shaft to bias the vertical driving lever downward.
- the vertical movement of the needle holder during embroidery is controlled by the vertical driving lever.
- JP2006-263170A (hereinafter referred to as Reference 2) discloses an embroidery presser of an embroidery sewing machine.
- the presser bar is lifted by manually operating the presser lifting lever to vertically move the presser bar.
- a presser lifting mechanism that lifts a presser foot member having a cloth pressing portion relatively with respect to a holder member by causing an abutting portion of the pivot lever for vertically moving the presser to abut on a frame of the sewing machine. In this technique, it is possible to enlarge an upward stroke of the cloth pressing portion when the presser bar is lifted by operating the presser lifting lever.
- JP2006-263272A (hereinafter referred to as Reference 3) discloses a safety cover provided to envelope a needle of a sewing machine.
- the safety cover is attached to a bed portion of the sewing machine so as to prevent the user's finger from contacting the needle.
- a sewing machine embroidery presser attached to a presser bar, in a sewing machine including a needle bar that has a needle holder for holding a needle and is vertically movable in a height direction, a presser bar vertically movable in the height direction, and a presser lifting lever for vertically moving the presser bar
- the sewing machine embroidery presser including: a presser holder attached to a lower portion of the presser bar using a fixture; an operational arm that is attached to the presser holder and moved vertically by the needle bar or the needle holder to vertically move in the height direction; a presser foot that is vertically movably held by the presser holder to move in synchronization with the operational arm, faces a needle plate of the sewing machine, and presses a target workpiece; a presser spring that is provided in the presser holder and has a biasing force for biasing the presser foot toward the needle plate; and a subsidiary lever pivotably provided in the presser holder, the subsidiary
- the presser foot is moved toward the presser holder side, and a height dimension of the entire embroidery presser is reduced. That is, the presser foot is temporarily set while it is moved toward the presser holder side so as not to be significantly projected toward the needle plate side. As a result, it is possible to improve the efficiency of attachment when the embroidery presser is attached to the presser bar.
- the pivoting position of the subsidiary lever is held in the presser holder to prevent free pivoting, and free pivoting of the subsidiary lever is prevented when the embroidery presser is attached to the presser bar. Therefore, it is possible to further facilitate an attachment work for attaching the embroidery presser in the presser bar.
- the embroidery presser having a reduced height dimension is attached to the presser bar, a wide gap is automatically formed between the embroidery presser and the needle plate. Therefore, the user is not required to cumbersomely manually lift the embroidery presser, and an embroidery frame can be easily set by passing the embroidery frame through the gap.
- the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set. Therefore, the presser foot is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. That is, the presser foot is moved to the presser holder side so as not to be significantly projected toward the needle plate side. For this reason, it is possible to improve efficiency when the presser bar is removed from the embroidery presser. Furthermore, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder without free pivoting so that it is possible to further improve efficiency when the embroidery presser is removed from the presser bar.
- the operational arm of the embroidery presser may be mounted on the needle holder and be vertically movable in the height direction in synchronization with a vertical movement of the needle bar along with the needle holder when the needle bar is moved vertically along with the needle holder, and the presser foot may be vertically movable in the height direction in synchronization with the operational arm.
- the needle bar is vertically moved
- the needle holder is vertically moved
- the embroidery presser is vertically moved. It is possible to obtain movability of the target workpiece such as a cloth on the needle plate by virtue of the vertical movement of the embroidery presser.
- the operational arm may be located a predetermined distance ⁇ H below the top dead point of the needle holder that moves vertically, and the lifting distance of the operational arm may be set smaller than the lifting distance from the bottom dead point to the top dead point of the needle holder. Even when the needle holder is moved vertically in the height direction (arrow direction H) along with the needle bar during embroidery, the lifting distance of the embroidery presser lifted by the needle holder is set smaller than the vertical movement distance of the needle holder. For this reason, it is possible to prevent the vertical movement of the embroidery presser from hindering the user's view during sewing such as embroidery.
- the sewing machine embroidery presser described above may further include a first spring for biasing the subsidiary lever to an embroiderable position by pivoting the presser foot downward toward the needle plate of a sewing machine bed. If the temporary setting between the operational arm and the fixing trench is released, the subsidiary lever is automatically set in the embroiderable position by the first spring. Therefore, it is possible to provide excellent operation.
- the presser foot of the embroidery presser may be vertically movable by pivoting operation of the subsidiary lever to an embroidery height position where embroidery is performed, a first height position higher than the embroidery height position, where the presser foot is raised from the needle plate, and a second height position higher than the first height position, where the presser foot is raised from the needle plate, and a cam profile of the cam surface of the subsidiary lever may be formed to sequentially lift the presser foot to the embroidery height position, the first height position, and the second height position in response to rotation operation of the subsidiary lever by the user, and lower the operational arm toward the needle plate as the rotation operation of the subsidiary lever by the user is released.
- the cam profile of the cam surface of the subsidiary lever can sequentially lift the presser foot to the embroidery height position, the first height position, and the second height position.
- the operational arm is lowered toward the needle plate.
- the presser foot may have a transparent cover wall erected to face the user who operates the sewing machine. Since the embroidery presser has a transparent cover wall, it is possible to prevent the user's finger from erroneously contacting the needle when needlework such as embroidery is performed. It is possible to improve user protection. In addition, even when the needle breaks during embroidery, it is possible to improve a barrier effect for the broken and scattered needle fragments and prevent the broken needle from being scattered toward the user by means of the cover wall. In this sense, it is possible to improve user protection.
- the cover wall may be attached to the sewing machine bed side. However, in this case, both work for attaching the embroidery presser and work for attaching the cover wall are necessary.
- the transparent cover wall is integrated with the embroidery presser as a single body. Therefore, if the embroidery presser is attached to the presser bar, the transparent cover wall for protecting the user can be automatically attached. Therefore, it is possible to obtain excellent efficiency.
- a sewing machine including a needle bar that has a needle holder for holding a needle and is vertically movable in the height direction, a presser bar vertically movable in the height direction, and a presser lifting lever for vertically moving the presser bar, and a sewing machine embroidery presser attached to a presser bar
- the sewing machine embroidery presser including: a presser holder attached to a lower portion of the presser bar using a fixture; an operational arm that is attached to the presser holder and moved vertically by the needle bar or the needle holder to vertically move in the height direction; a presser foot that is vertically movably held by the presser holder to move in synchronization with the operational arm, faces a needle plate of the sewing machine, and presses a target workpiece; a presser spring that is provided in the presser holder and has a biasing force for biasing the presser foot toward the needle plate; and a subsidiary lever pivotably provided in the presser holder, the subsidiary lever
- the presser foot is moved toward the presser holder side, and a height dimension of the entire embroidery presser is reduced. That is, the presser foot is temporarily set while it is moved toward the presser holder side so as not to be significantly projected toward the needle plate side. As a result, it is possible to improve the efficiency of attachment when the embroidery presser is attached to the presser bar.
- the pivoting position of the subsidiary lever is held in the presser holder to prevent free pivoting, and free pivoting of the subsidiary lever is prevented when the embroidery presser is attached to the presser bar. Therefore, it is possible to further facilitate an attachment work for attaching the embroidery presser in the presser bar.
- the embroidery presser having a reduced height dimension is attached to the presser bar, a wide gap is automatically formed between the embroidery presser and the needle plate. Therefore, the user is not required to cumbersomely manually lift the embroidery presser, and an embroidery frame can be easily set by passing the embroidery frame through the gap.
- the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set. Therefore, the presser foot is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. That is, the presser foot is moved to the presser holder side so as not to be significantly projected toward the needle plate side. For this reason, it is possible to improve efficiency when the presser bar is removed from the embroidery presser. Furthermore, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder without free pivoting so that it is possible to further improve efficiency when the embroidery presser is removed from the presser bar.
- the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set when the embroidery presser is attached to or removed from the presser bar, the presser foot of the embroidery presser is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. As a result, it is possible to facilitate an attachment or removal work of the embroidery presser.
- Fig. 1 is a perspective view illustrating a state that the embroidery presser is attached to the presser bar as seen from the front side of the sewing machine;
- Fig. 2 is a perspective view illustrating a state that the embroidery presser is attached to the presser bar as seen from the rear side of the sewing machine;
- Fig. 3 is a perspective view illustrating a state that the embroidery presser is exploded
- Fig. 4 is a perspective view illustrating a state that the embroidery presser is assembled
- Fig. 5A is a front view illustrating a state of the embroidery needlework
- Fig. 5B is a side view illustrating a state of the embroidery needlework
- Fig. 6A is a front view illustrating a state when the embroidery presser is attached or removed;
- Fig. 6B is a side view illustrating a state when the embroidery presser is attached or removed;
- Fig. 7A is a front view illustrating a state when the embroidery frame passes
- Fig. 7B is a side view illustrating a state when the embroidery frame passes
- Fig. 8A is a side view illustrating a state that the presser lifting lever having a state of Figs. 6A and 6B is lowered from the second level to the first level due to the user's error;
- Fig. 8B is a side view illustrating a state that the presser lifting lever having a state of Figs. 6A and 6B is lowered from the second level to the zeroth level due to the user's error.
- a presser holder is attached to a lower portion of the presser bar using a fixture.
- the operational arm is attached to the presser holder and is lifted by a part of the needle bar or the needle holder to vertically move in the height direction.
- the presser foot is vertically movably held in the presser holder in synchronization with the operational arm, faces the needle plate of the sewing machine, and presses the target workpiece.
- the presser spring is attached to the presser holder and has a biasing force for biasing the presser foot toward the needle plate.
- the subsidiary lever is pivotably attached to the presser holder.
- the subsidiary lever includes a cam surface having a cam profile for vertically moving the operational arm in response to pivoting, a fixing trench engaged with the operational arm to move the presser foot to the presser holder side and temporarily set the presser foot in the first height position raised from the needle plate, and an operating portion operated by the user's finger.
- Fig. 1 is a front view illustrating a state that the embroidery presser 3 is attached to a lower end portion 13d of the presser bar 13 of a sewing machine.
- Fig. 2 is a rear view illustrating the same state.
- the sewing machine is provided with a microcomputer. As shown in Figs.
- the sewing machine includes : a needle bar 1 that holds a needle holder 11 for holding the needle 10 using a stopper 12 and can vertically move along the height direction (arrow direction H); a presser bar 13 that can vertically move in the height direction; a presser lifting lever 14 rotatably operated by the user's fingertip in order to move the presser bar 13 vertically in the arrow direction H; a sewing machine body 2 that holds the needle bar 1, the presser bar 13, and the presser lifting bar 14; and an embroidery presser 3 detachably attached to a lower end portion 13d of the presser bar 13 using a fixture (screw) 30.
- the embroidery presser 3 is to appropriately press a cloth as target workpiece for performing embroidery and embroidery formed in the cloth during the embroidery.
- the main spring 15 is seated on a seat portion 21a of the sewing machine frame 21 of the sewing machine body 2 and exerts a biasing force for biasing the presser bar 13 downward at all times (in the arrow direction D).
- the operational arm 39 as an element of the embroidery presser 3 is located above the needle holder 11 and is lifted when the needle holder 11 vertically moving along with the needle bar 1 is moved vertically in the arrow direction U.
- the operational arm 39 is mounted on the needle holder 11 and is configured to vertically move in the height direction (arrow direction H) in synchronization with the needle bar 1 along with the needle holder 11. Therefore, the embroidery presser 3 having the presser foot 33 moves vertically in the height direction in synchronization with vertical movement of the operational arm 39.
- the vertical movement of the needle bar 1 is detected by the detector 20, and the detection signal is input to the microcomputer.
- the presser bar 13 As the user operates the presser lifting lever 14, the presser bar 13 is moved vertically in synchronization with this operation in the arrow direction H. As the user operates the presser lifting lever 14, the presser bar 13 can be fixedly and temporarily set in a zeroth level which is a typical needlework position, a first level higher than the zeroth level, and a second level higher than the first level in the arrow direction H, by means of the presser lifting lever 14.
- An upper thread tension adjuster (not shown) is mounted in the sewing machine body 2. At the zeroth level, in order to perform a typical needlework, the upper thread is activated (tensioned). At the first level, the upper thread is inactivated (distensioned). At the second level, the upper thread is activated (tensioned).
- the presser bar 13 is located lower than the first level so that a typical needlework can be performed.
- the presser lifting lever 14 and the presser bar 13 are at the first level, the upper thread is inactivated and distensioned so that the user is allowed to arbitrarily move a cloth as a target workpiece on the needle plate 23.
- the presser lifting lever 14 and the presser bar 13 are at the second level, the presser bar 13 is lifted above the first level.
- the lower end portion of the presser bar 13 is lifted so that the user does not have to care about contact between the embroidery frame and the lower end portion of the presser bar 13, and the user can perform free-hand embroidery (a mode in which the user does embroidery by moving the embroidery frame with a hand) by arbitrarily moving the embroidery frame on the needle plate 23.
- the embroidery presser 3 according to the present embodiment is detachably provided in the lower end portion of the presser bar 13.
- the presser lifting lever 14 is set in the second level S2, and the presser bar 13 is lifted to the second level in the arrow direction H (see Figs. 5A and 5B ).
- the main reason of that is to set the presser lifting lever 14 to the second level S2 during embroidery and facilitate the attachment work by increasing a space between the lower end portion of the presser bar 13 and the needle plate 23.
- Fig. 3 illustrates a state that the embroidery presser 3 is exploded.
- Fig. 4 illustrates a state that the embroidery presser 3 is assembled.
- the embroidery presser 3 includes: a presser holder 31 attached to the lower end portion 3d of the presser bar 13 using a fixture 30; an operational arm 39 attached to the presser holder 31 to vertically move in the height direction (arrow direction H) along with the needle bar 1 and the needle holder 11; a presser foot 33 vertically movably held in the presser holder 31 to press a target workpiece; a coil-shaped presser spring 34 attached to the presser holder 31; and a subsidiary lever 4 pivotably attached to the presser holder 31 and pivotably operated by the user's finger.
- the presser holder 31 includes: a long hole 31a extending in the height direction (arrow direction H); an upper guard portion 31c having an upper through-hole 31b; a lower guard portion 31f having a lower through-hole 31e, a pivot axis 32h, a stopper 32s, and a fixing portion 32t where the fixture 30 is screwably attached.
- the subsidiary lever 4 includes: a cylindrical portion 40c which forms a pivot hole 40 serving as a rotation center of the subsidiary lever 4; a cam surface 42 having a cam profile for vertically moving the operational arm 39 in response to pivoting; a fixing trench 44 formed on the cam surface 42, and an operating portion 45 operated by the user's finger.
- the cam surface 42 includes cam surfaces 42a and 42b in both sides of the fixing trench 44.
- the pivot hole 40 and the pivot axis 32h are rotatably fitted together such that the first spring 46 is interposed between the holder 31 and the subsidiary lever 4 to attach the subsidiary lever 4 in the holder 31.
- the first spring 46 is a torsion coil spring and includes an arm 46a latched to the holder 31 and an arm 46c latched to the subsidiary lever 4.
- the first spring 46 exerts a biasing force for biasing the operating portion 45 of the subsidiary lever 4 downward (in the arrow direction F of Fig. 4 ).
- the first spring 46 exerts a biasing force for biasing the presser foot 33 to the needle plate 23 downward (in the arrow direction D) at all times (see Figs. 5 to 8 ).
- the subsidiary lever 4 biased by the first spring 46 is pivoted downward (arrow direction F) until a stopper target 4s thereof abuts on the stopper 32s.
- the presser foot 33 is made of a transparent material (such as transparent resin, preferably, having high transparency). As shown in Fig. 3 , the presser foot 33 includes: a shaft portion 33b having a shaft hole 33a where the lower end portion 35p of the presser shaft 35 is fitted; a bottom portion 33e having a needle hole 33c where a needle is inserted; and a transparent cover wall 33h erected above the bottom portion 33e to face the user. Since the cover wall 33h is transparent, it is possible to obtain visibility of a needle tip. Furthermore, the cover wall 33h prevents the user's finger from touching the needle and the like. Moreover, when the needle breaks, it prevents the needle from being scattered to the user. The cover wall 33h faces the user positioned in front of the sewing machine but is not formed in the lateral direction (arrow direction X in Fig. 4 ). Therefore, the cover wall 33h does not hinder work for threading the needle 10.
- a transparent material such as transparent resin, preferably, having high transparency
- the presser shaft 35 is provided to extend in the height direction and includes an upper hole 35a, a latch groove 35c where a snap ring 35b is fitted, and a lower hole 35d in order from the upper end to the lower end of the presser shaft 35.
- the spring pin 37 is inserted into the attachment hole 33x of the presser foot 33 and the lower hole 35d of the presser shaft 35, and as a result, the presser foot 33 is attached to the lower end portion 35p of the presser shaft 35.
- the presser foot 33 and the presser shaft 35 may be integrated into a single body.
- the presser spring 34 is formed from a coil spring and is elastically contractably compressed between the snap ring 35b and the upper guard portion 31c to exert a biasing force for biasing the presser bar 13 and the presser foot 33 downward (in the arrow direction D), that is, toward the needle plate.
- the operational arm 39 is bent in a crank shape by the bent portion 39a and includes a leading end portion 39c and a base end portion 39d.
- the operational arm 39 may not be bent necessarily.
- the leading end portion 39c of the operational arm 39 is inserted into the upper hole 35a of the presser shaft 35 and penetrates the long hole 31a toward the subsidiary lever 4 side. Since the leading end portion 39c is fitted to the long hole 31a, it can be moved vertically in the height direction (arrow direction H) along the long hole 31a. However, displacement in a horizontal direction is prevented, and the presser shaft 35 is not pivoted in the central axis direction.
- the leading end portion 39c of the operational arm 39 is exposed upward from the upper guard portion 31c, along with the upper end portion 35u of the presser shaft 35.
- the leading end portion 39c of the operational arm 39 faces the cam surface 42 while it is located above the cam surface 42 of the subsidiary lever 4.
- the snap ring 35b of the presser shaft 35 contacts the upper surface of the lower guard portion 31f
- the leading end portion 39c of the operating portion 45 contacts the surface of the upper guard portion 31c.
- the leading end portion 39c faces the cam surface 42 of the subsidiary lever 4 (see Fig. 4 ).
- the cam surface 42 can vertically move the leading end portion 39c of the operating portion 45 in the height direction (arrow direction H) along the long hole 31a.
- the presser shaft 35 and the presser foot 33 are vertically moved in synchronization in the same direction.
- the leading end portion 39c of the operational arm 39 is engaged with the fixing trench 44 while it moves along the cam surface 42 so that it can be temporarily set in the fixing trench 44.
- the fixing trench 44 is engaged with the leading end portion 39c of the operational arm 39 so as to temporarily set the presser foot 33 in the first height position M1 thereof.
- the bottom portion 33e of the presser foot 33 is maintained in a raised state from the needle plate 23 by a gap dimension B5 (see Fig. 6A and Fig. 6B ).
- Figs. 5 to 7 the presser lifting lever 14 is set in the second level S2, and the presser bar 13 is held in the second level position and is raised from the needle plate 23.
- Figs. 5A and 5B illustrate a state that the subsidiary lever 4 is lowered by the first spring 46 and is set in the embroiderable position P1.
- the bottom portion 33e of the presser foot 33 is biased downward (in the arrow direction D)by the biasing force of the presser spring 34 so as to press the needle plate 23. Therefore, a cloth (target workpiece) is interposed and fixed between the needle plate 23 and the bottom portion 33e of the presser foot 33.
- a gap dimension A3 see Fig.
- the presser foot 33 if the vertical movement distance of the presser foot 33 is large in the needlework such as embroidery when the subsidiary lever 4 is set in the embroiderable position P1, the presser foot 33 significantly and moves vertically in the arrow direction H, and this may hinder the user's view.
- the needle holder 11 is vertically moved in the arrow direction H between the bottom dead point and the top dead point thereof, but the operational arm 39 is located a small distance ⁇ H (for example, 0.2 to 2.0 millimeters) lower than the top dead point of the needle holder 11.
- the vertical movement distance of the operational arm 39 lifted by the needle holder 11 is a small distance ⁇ H relative to the vertical movement distance of the needle holder 11.
- the lifting distance of the presser foot 33 of the embroidery presser 3 is also insignificant, and particularly, it does not hinder the user's view.
- the operational arm 39 is also lowered when the needle holder 11 is lowered to the bottom dead point, the presser foot 33 reaches the needle plate 23, so that it is not further lowered beyond ⁇ H.
- the needle bar 1 is vertically moved between the top dead point and the bottom dead point thereof in the arrow direction H.
- the needle holder 11 held in the needle bar 1 to fix the needle 10 is also vertically moved between the top dead point and the bottom dead point thereof. Even when the needle holder 11 is lowered to the bottom dead point thereof, the needle holder 11 does not collide with the presser foot 33 of the embroidery presser 3 on the needle plate 23.
- the needle holder 11 includes a needle holding body 11a and a needle holding screw 11c (see Fig. 1 ).
- the subsidiary lever 4 is set in the temporarily setting position P2.
- the operational arm 39 is moved along the cam surface 42a of the subsidiary lever 4 and is lifted upward (in the arrow direction U), and the leading end portion 39c of the operational arm 39 is lifted along the long hole 31a.
- the presser foot 33 vertically moving in synchronization with the operational arm 39 is also lifted in the arrow direction U, and the leading end portion 39c of the operational arm 39 is engaged with the fixing trench 44 and is temporarily set (see Fig. 6B ). That is, the subsidiary lever 4 is set in the temporary setting position P2.
- the bottom portion 33e of the presser foot 33 is temporarily set in the first height position M1 thereof (see Fig. 6B ).
- an engagement dimension B4 corresponds to the engagement amount between the leading end portion 39c of the operational arm 39 and the trench bottom surface of the fixing trench 44.
- the subsidiary lever 4 is not pivoted downward (arrow direction F), in spite of the biasing force of the presser spring 34 and the first spring 46, even when the user removes a finger from the operating portion 45 of the subsidiary lever 4. Therefore, the subsidiary lever 4 is temporarily set in the temporary setting position P2 pivoted upward by an angle B1 from the embroiderable position P1.
- the user can cause the embroidery frame which tightens the embroidery cloth to pass through a space under the bottom portion 33e of the presser foot 33 on the needle plate 23 without lifting the subsidiary lever 4 or the presser foot 33 with a finger. Therefore, it is possible to set the embroidery frame on a sewing machine bed in a simple manner.
- an embroidery frame having a height dimension equal to or greater than the gap dimension B5 may be used.
- the user further upward (in the arrow direction B) pivots the operating portion 45 of the subsidiary lever 4 with a finger in the state of Figs. 6A and 6B , that is, if the subsidiary lever 4 is further lifted from the embroiderable position P1 thereof by an angle C1, the operational arm 39 is further lifted along the cam surface 42b of the subsidiary lever 4.
- the presser foot 33 and the presser shaft 35 integrated with the operational arm 39 are also lifted in synchronization in the arrow direction U.
- the presser foot 33 is further raised from the needle plate 23 and is set in the second height position M2.
- a wider gap dimension C2 (C2>B5) is formed between the bottom portion 33e of the presser foot 33 and the needle plate 23.
- a wide gap dimension C2 is formed, even a thick embroidery frame can pass through a space under the bottom portion 33e of the presser foot 33 on the needle plate 23. Therefore, it is possible to also facilitate setting of a thick embroidery frame.
- the presser foot 33 is set in the second height position M2 as shown in Figs. 7A and 7B , the operational arm 39 and the fixing trench 44 are not engaged.
- the subsidiary lever 4 is automatically pivoted downward (arrow direction F) by virtue of the biasing force of the first spring 46, and the subsidiary lever 4 is set in a temporary setting position P2 (see Fig. 6B ) so that the presser foot 33 is projected downward by virtue of the biasing force of the presser spring 34.
- the reason the subsidiary lever 4 is returned downward to the temporary setting position P2 is as follows. That is, this is to prevent contact between the embroidery presser 3 and the needle holder 11 held in the needle bar 1 and prevent damage even when the needle bar 1 is lowered and reaches the bottom dead point. Therefore, the gap dimension B5 is previously set to a size capable of preventing contact between the needle holder 11 and the embroidery presser 3 even when the needle bar 1 is lowered and reaches the bottom dead point. In this manner, since the operational arm 39 and the fixing trench 44 are not engaged in the state of Figs. 7A and 7B , the subsidiary lever 4 is pivoted downward (arrow direction F) by virtue of the biasing force of the first spring 46 and is returned to the state of Figs.
- the embroidery presser 3 is attached to the lower end portion 13d of the presser bar 13 using a fixture 30 (see Fig. 1 ) while the presser bar 13 is set in the second level by holding the presser lifting lever 14 in the second level S2 as described above.
- the state of Figs. 6A, 6B , 7A, or 7B is obtained.
- the embroidery frame can pass through a space between the presser foot 33 and the needle plate 23 and can be set.
- the subsidiary lever 4 As the subsidiary lever 4 is lowered from the temporary setting position P2 in the arrow direction F by an angle B1 after the passage, the subsidiary lever 4 is set in the embroiderable position P1 (see Figs. 5A and 5B ), and embroidery can be performed.
- Fig. 8A illustrates a state that the user pivotes the presser lifting lever 14 from the second level S2 by an angle D1 and erroneously lowers the presser lifting lever 14 to the first level S1.
- the presser bar 13 is also slightly lowered as the presser lifting lever 14 is operated, the presser foot 33 of the embroidery presser 3 is also lowered accordingly.
- Fig. 8A illustrates a state that the user pivotes the presser lifting lever 14 from the second level S2 by an angle D1 and erroneously lowers the presser lifting lever 14 to the first level S1.
- the presser bar 13 is also slightly lowered as the presser lifting lever 14 is operated, the presser foot 33 of the embroidery presser 3 is also lowered accordingly.
- Fig. 8A illustrates a state that the user pivotes the presser lifting lever 14 from the second level S2 by an angle D1 and erroneously lowers the presser lifting lever 14 to the first level S1.
- the presser bar 13 is also slightly lowered as
- the bottom portion 33e of the presser foot 33 does not abut on the needle plate 23, and a gap dimension D5(D5 ⁇ B5) is formed between the presser foot 33 and the needle plate 23. For this reason, a force that separates the leading end portion 39c of the operational arm 39 from the fixing trench 44 is not generated. Therefore, the operational arm 39 is still engaged with the fixing trench 44 (see Fig. 8A ).
- FIG. 8B illustrates a state that the user erroneously lowers the presser lifting lever 14 to the zeroth level S0 by pivoting the presser lifting lever 14 from the second level S2 by an angle E1.
- the presser bar 13 is considerably lowered in synchronization with the downward operation of the presser lifting lever 14, the bottom portion 33e of the presser foot 33 contacts the needle plate 23 accordingly. Therefore, presser bar 13 is lifted relatively in the arrow direction U against the biasing force of the presser spring 34. Furthermore, the presser foot 33, the presser shaft 35, and the operational arm 39 are lifted relatively in the arrow direction U with respect to the presser holder 31.
- the leading end portion 39c of the operational arm 39 is separated from the fixing trench 44 and approaches the upper end 31au of the long hole 31a (see Fig. 8B ). Since the lifting distance in this case is greater than the engagement dimension B4 of the operational arm 39 shown in Fig. 6A and Fig. 6B , the leading end portion 39c of the operational arm 39 is separated from the fixing trench 44 of the cam surface 42 as described above. In this manner, as the operational arm 39 is separated from the fixing trench 44, the subsidiary lever 4 is automatically pivoted downward (arrow direction F) by virtue of the biasing force of the first spring 46 and the presser spring 34 so that the subsidiary lever 4 is automatically switched to the embroiderable position P1 (see Fig. 8B ), and the presser foot 33 is projected downward.
- the presser lifting lever 14 is pivotably operated and temporarily set in order to prevent the presser bar 13 from falling. This is because, in this sewing machine, the embroidery mode is set when the presser bar 13 is temporarily set in the second level as described above. In this manner, the user can manually attach the embroidery presser 3 in the lower end portion 13d of the presser bar 13 while the presser bar 13 is temporarily set in a high position.
- the operational arm 39 of the embroidery presser 3 is engaged with the fixing trench 44 of the cam surface 42 of the subsidiary lever 4 and is temporarily set.
- the presser foot 33 is moved to the presser holder 31 side against the biasing force of the presser spring 34 and the presser spring 34.
- a height dimension HA see Figs. 6A and 6B ) of the embroidery presser 3 is reduced.
- the bottom portion 33e of the presser foot 33 is prevented from moving so as to be significantly projected from the presser holder 31 by the biasing force of the presser spring 34.
- a gap dimension B5 between the presser foot 33 and the needle plate 23 is also held.
- a wider gap dimension C2 is formed by pivoting the subsidiary lever 4 upward, as described above.
- the embroidery presser 3 since the embroidery presser 3 has a transparent cover wall 33h facing the user who operates the sewing machine, it is possible to prevent the user's finger from erroneously touching the needle 10 during needlework such as embroidery and improve user protection. Furthermore, even when the needle breaks during embroidery, it is possible to improve a barrier effect for the broken and scattered needle fragments and prevent the broken needle from being scattered toward the user by means of the cover wall 33h.
- the cover wall 33h may be attached to the sewing machine bed side. However, in this case, both work for attaching the embroidery presser 3 and work for attaching the cover wall 33h are necessary.
- the transparent cover wall 33h is integrated with the embroidery presser 3 as a single body as described above. Therefore, if the embroidery presser 3 is attached to the lower end portion 13d of the presser bar 13, the transparent cover wall 33h for protecting the user can be automatically attached. Therefore, it is possible to obtain excellent efficiency.
- the lifting distance of the embroidery presser 3 lifted by the needle holder 11 is a small distance ⁇ H, compared to the vertical movement distance of the needle holder 11.
- the vertical movement distance of the cover wall 33h is also insignificant, and it does not hinder the user's view. As a result, it is possible to increase a size of the cover wall 33h and improve user protection in this sense.
- the presser bar 13 is lifted to the second level when the embroidery presser 3 is attached to the lower end portion of the presser bar 13 using a fixture according to the aforementioned embodiment, this disclosure is not limited thereto. Instead, the presser bar 13 may be lifted to the first level.
- the presser spring 34 is a coil spring, other springs such as a torsion coil spring and a plate spring may be used.
- the presser foot 33 has a transparent cover wall 33h, the cover wall 33h may not be provided.
- the presser bar 13 can be fixedly and temporarily set in the zeroth level which is a typical needlework position (upper thread is tensioned), the first level (upper thread is distensioned) higher than the zeroth level, and the second level (upper thread is tensioned) higher than the first level using the presser lifting lever 14.
- a sewing machine is by no means limiting, and this disclosure may be applied to other types of sewing machines, for example, if it can temporarily set the presser bar 13 in a predetermined height position in order to attach the embroidery presser 3.
- the operational arm 39 is moved vertically using the needle holder 11 of the needle bar 1, the operational arm 39 may be directly moved vertically using the needle bar 1 without the needle holder 11.
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Abstract
Description
- This disclosure relates to an embroidery presser attached to a vertically-movable presser bar in a sewing machine and a sewing machine.
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JP2005-58360A -
JP2006-263170A -
JP2006-263272A - In the techniques disclosed in the aforementioned literatures of the related art, since the presser foot is significantly projected toward the needle plate side, and a height of the embroidery presser is large, work is not easy when an embroidery presser is attached to or removed from the presser bar of the sewing machine.
- In
Reference 1, to allow the user to pass through the embroidery frame, operations such as operation of the presser lifting lever and operation of the embroidery presser lever are necessary. This degrades efficiency. InReference 2, when the presser bar is positioned in a first level, a lever for lifting the presser foot of the embroidery presser touches the frame of the sewing machine. Therefore, attachment is to be made while the user presses the lever with a hand. This degrades efficiency. In addition, when the presser bar is positioned in a zeroth level, the presser foot of the embroidery presser contacts the needle plate. Therefore, the user is required to press the presser foot of the embroidery presser with a hand in order to prevent the presser foot from contacting the needle plate. This degrades efficiency. - Thus, a need exists for a sewing machine embroidery presser and a sewing machine capable of facilitating work for attaching or removing the embroidery presser to or from the presser bar.
- According to an aspect of this disclosure, there is provided a sewing machine embroidery presser attached to a presser bar, in a sewing machine including a needle bar that has a needle holder for holding a needle and is vertically movable in a height direction, a presser bar vertically movable in the height direction, and a presser lifting lever for vertically moving the presser bar, the sewing machine embroidery presser including: a presser holder attached to a lower portion of the presser bar using a fixture; an operational arm that is attached to the presser holder and moved vertically by the needle bar or the needle holder to vertically move in the height direction; a presser foot that is vertically movably held by the presser holder to move in synchronization with the operational arm, faces a needle plate of the sewing machine, and presses a target workpiece; a presser spring that is provided in the presser holder and has a biasing force for biasing the presser foot toward the needle plate; and a subsidiary lever pivotably provided in the presser holder, the subsidiary lever including a cam surface having a cam profile for vertically moving the operational arm in response to pivoting, a fixing trench that engages with the operational arm to move the presser foot to the presser holder side and temporarily set the presser foot in a first height position raised from the needle plate, and an operating portion operated by the user's finger.
- If the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set when the embroidery presser is attached to the presser bar, the presser foot is moved toward the presser holder side, and a height dimension of the entire embroidery presser is reduced. That is, the presser foot is temporarily set while it is moved toward the presser holder side so as not to be significantly projected toward the needle plate side. As a result, it is possible to improve the efficiency of attachment when the embroidery presser is attached to the presser bar. In addition, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder to prevent free pivoting, and free pivoting of the subsidiary lever is prevented when the embroidery presser is attached to the presser bar. Therefore, it is possible to further facilitate an attachment work for attaching the embroidery presser in the presser bar.
- In addition, if the embroidery presser having a reduced height dimension is attached to the presser bar, a wide gap is automatically formed between the embroidery presser and the needle plate. Therefore, the user is not required to cumbersomely manually lift the embroidery presser, and an embroidery frame can be easily set by passing the embroidery frame through the gap.
- When the embroidery presser attached to the presser bar is removed, the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set. Therefore, the presser foot is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. That is, the presser foot is moved to the presser holder side so as not to be significantly projected toward the needle plate side. For this reason, it is possible to improve efficiency when the presser bar is removed from the embroidery presser. Furthermore, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder without free pivoting so that it is possible to further improve efficiency when the embroidery presser is removed from the presser bar.
- In the sewing machine embroidery presser described above, the operational arm of the embroidery presser may be mounted on the needle holder and be vertically movable in the height direction in synchronization with a vertical movement of the needle bar along with the needle holder when the needle bar is moved vertically along with the needle holder, and the presser foot may be vertically movable in the height direction in synchronization with the operational arm. In this case, as the needle bar is vertically moved, the needle holder is vertically moved, and furthermore, the embroidery presser is vertically moved. It is possible to obtain movability of the target workpiece such as a cloth on the needle plate by virtue of the vertical movement of the embroidery presser.
- In the sewing machine embroidery presser described above, the operational arm may be located a predetermined distance ΔH below the top dead point of the needle holder that moves vertically, and the lifting distance of the operational arm may be set smaller than the lifting distance from the bottom dead point to the top dead point of the needle holder. Even when the needle holder is moved vertically in the height direction (arrow direction H) along with the needle bar during embroidery, the lifting distance of the embroidery presser lifted by the needle holder is set smaller than the vertical movement distance of the needle holder. For this reason, it is possible to prevent the vertical movement of the embroidery presser from hindering the user's view during sewing such as embroidery.
- The sewing machine embroidery presser described above may further include a first spring for biasing the subsidiary lever to an embroiderable position by pivoting the presser foot downward toward the needle plate of a sewing machine bed. If the temporary setting between the operational arm and the fixing trench is released, the subsidiary lever is automatically set in the embroiderable position by the first spring. Therefore, it is possible to provide excellent operation.
- In the sewing machine embroidery presser described above, the presser foot of the embroidery presser may be vertically movable by pivoting operation of the subsidiary lever to an embroidery height position where embroidery is performed, a first height position higher than the embroidery height position, where the presser foot is raised from the needle plate, and a second height position higher than the first height position, where the presser foot is raised from the needle plate, and a cam profile of the cam surface of the subsidiary lever may be formed to sequentially lift the presser foot to the embroidery height position, the first height position, and the second height position in response to rotation operation of the subsidiary lever by the user, and lower the operational arm toward the needle plate as the rotation operation of the subsidiary lever by the user is released. In this example, as the subsidiary lever is pivotably operated, the cam profile of the cam surface of the subsidiary lever can sequentially lift the presser foot to the embroidery height position, the first height position, and the second height position. In addition, as the rotation operation of the subsidiary lever by the user is released, the operational arm is lowered toward the needle plate.
- In the sewing machine embroidery presser described above, the presser foot may have a transparent cover wall erected to face the user who operates the sewing machine. Since the embroidery presser has a transparent cover wall, it is possible to prevent the user's finger from erroneously contacting the needle when needlework such as embroidery is performed. It is possible to improve user protection. In addition, even when the needle breaks during embroidery, it is possible to improve a barrier effect for the broken and scattered needle fragments and prevent the broken needle from being scattered toward the user by means of the cover wall. In this sense, it is possible to improve user protection. As in
Reference 3, the cover wall may be attached to the sewing machine bed side. However, in this case, both work for attaching the embroidery presser and work for attaching the cover wall are necessary. However, in this example, the transparent cover wall is integrated with the embroidery presser as a single body. Therefore, if the embroidery presser is attached to the presser bar, the transparent cover wall for protecting the user can be automatically attached. Therefore, it is possible to obtain excellent efficiency. - According to another aspect of this disclosure, there is provided a sewing machine including a needle bar that has a needle holder for holding a needle and is vertically movable in the height direction, a presser bar vertically movable in the height direction, and a presser lifting lever for vertically moving the presser bar, and a sewing machine embroidery presser attached to a presser bar, the sewing machine embroidery presser including: a presser holder attached to a lower portion of the presser bar using a fixture; an operational arm that is attached to the presser holder and moved vertically by the needle bar or the needle holder to vertically move in the height direction; a presser foot that is vertically movably held by the presser holder to move in synchronization with the operational arm, faces a needle plate of the sewing machine, and presses a target workpiece; a presser spring that is provided in the presser holder and has a biasing force for biasing the presser foot toward the needle plate; and a subsidiary lever pivotably provided in the presser holder, the subsidiary lever including a fixing trench that temporarily sets the presser foot in a first height position raised from the needle plate by engaging the operational arm with a cam surface having a cam profile for vertically moving the operational arm in response to pivoting and moving the presser foot to the presser holder side and an operating portion operated by the user's finger.
- If the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set when the embroidery presser is attached to the presser bar, the presser foot is moved toward the presser holder side, and a height dimension of the entire embroidery presser is reduced. That is, the presser foot is temporarily set while it is moved toward the presser holder side so as not to be significantly projected toward the needle plate side. As a result, it is possible to improve the efficiency of attachment when the embroidery presser is attached to the presser bar. In addition, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder to prevent free pivoting, and free pivoting of the subsidiary lever is prevented when the embroidery presser is attached to the presser bar. Therefore, it is possible to further facilitate an attachment work for attaching the embroidery presser in the presser bar.
- In addition, if the embroidery presser having a reduced height dimension is attached to the presser bar, a wide gap is automatically formed between the embroidery presser and the needle plate. Therefore, the user is not required to cumbersomely manually lift the embroidery presser, and an embroidery frame can be easily set by passing the embroidery frame through the gap.
- When the embroidery presser attached to the presser bar is removed, the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set. Therefore, the presser foot is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. That is, the presser foot is moved to the presser holder side so as not to be significantly projected toward the needle plate side. For this reason, it is possible to improve efficiency when the presser bar is removed from the embroidery presser. Furthermore, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set, the pivoting position of the subsidiary lever is held in the presser holder without free pivoting so that it is possible to further improve efficiency when the embroidery presser is removed from the presser bar.
- According to this disclosure, if the operational arm of the embroidery presser is engaged with the fixing trench of the subsidiary lever and is temporarily set when the embroidery presser is attached to or removed from the presser bar, the presser foot of the embroidery presser is moved to the presser holder side, and the height dimension of the entire embroidery presser is reduced. As a result, it is possible to facilitate an attachment or removal work of the embroidery presser.
- The foregoing and additional features and characteristics of this disclosure will become more apparent from the following detailed description considered with the reference to the accompanying drawings, wherein:
-
Fig. 1 is a perspective view illustrating a state that the embroidery presser is attached to the presser bar as seen from the front side of the sewing machine; -
Fig. 2 is a perspective view illustrating a state that the embroidery presser is attached to the presser bar as seen from the rear side of the sewing machine; -
Fig. 3 is a perspective view illustrating a state that the embroidery presser is exploded; -
Fig. 4 is a perspective view illustrating a state that the embroidery presser is assembled; -
Fig. 5A is a front view illustrating a state of the embroidery needlework; -
Fig. 5B is a side view illustrating a state of the embroidery needlework; -
Fig. 6A is a front view illustrating a state when the embroidery presser is attached or removed; -
Fig. 6B is a side view illustrating a state when the embroidery presser is attached or removed; -
Fig. 7A is a front view illustrating a state when the embroidery frame passes; -
Fig. 7B is a side view illustrating a state when the embroidery frame passes; -
Fig. 8A is a side view illustrating a state that the presser lifting lever having a state ofFigs. 6A and 6B is lowered from the second level to the first level due to the user's error; and -
Fig. 8B is a side view illustrating a state that the presser lifting lever having a state ofFigs. 6A and 6B is lowered from the second level to the zeroth level due to the user's error. - A presser holder is attached to a lower portion of the presser bar using a fixture. The operational arm is attached to the presser holder and is lifted by a part of the needle bar or the needle holder to vertically move in the height direction. The presser foot is vertically movably held in the presser holder in synchronization with the operational arm, faces the needle plate of the sewing machine, and presses the target workpiece. The presser spring is attached to the presser holder and has a biasing force for biasing the presser foot toward the needle plate. The subsidiary lever is pivotably attached to the presser holder. The subsidiary lever includes a cam surface having a cam profile for vertically moving the operational arm in response to pivoting, a fixing trench engaged with the operational arm to move the presser foot to the presser holder side and temporarily set the presser foot in the first height position raised from the needle plate, and an operating portion operated by the user's finger.
- Hereinafter, embodiments of this disclosure will be described with reference to the accompanying drawings.
Fig. 1 is a front view illustrating a state that theembroidery presser 3 is attached to alower end portion 13d of thepresser bar 13 of a sewing machine.Fig. 2 is a rear view illustrating the same state. The sewing machine is provided with a microcomputer. As shown inFigs. 1 and2 , the sewing machine includes : aneedle bar 1 that holds aneedle holder 11 for holding theneedle 10 using a stopper 12 and can vertically move along the height direction (arrow direction H); apresser bar 13 that can vertically move in the height direction; apresser lifting lever 14 rotatably operated by the user's fingertip in order to move thepresser bar 13 vertically in the arrow direction H; asewing machine body 2 that holds theneedle bar 1, thepresser bar 13, and thepresser lifting bar 14; and anembroidery presser 3 detachably attached to alower end portion 13d of thepresser bar 13 using a fixture (screw) 30. Theembroidery presser 3 is to appropriately press a cloth as target workpiece for performing embroidery and embroidery formed in the cloth during the embroidery. - As shown in
Fig. 1 , themain spring 15 is seated on aseat portion 21a of thesewing machine frame 21 of thesewing machine body 2 and exerts a biasing force for biasing thepresser bar 13 downward at all times (in the arrow direction D). Meanwhile, as shown inFig. 1 , theoperational arm 39 as an element of theembroidery presser 3 is located above theneedle holder 11 and is lifted when theneedle holder 11 vertically moving along with theneedle bar 1 is moved vertically in the arrow direction U. When theneedle bar 1 moves vertically, theoperational arm 39 is mounted on theneedle holder 11 and is configured to vertically move in the height direction (arrow direction H) in synchronization with theneedle bar 1 along with theneedle holder 11. Therefore, theembroidery presser 3 having thepresser foot 33 moves vertically in the height direction in synchronization with vertical movement of theoperational arm 39. The vertical movement of theneedle bar 1 is detected by thedetector 20, and the detection signal is input to the microcomputer. - As the user operates the
presser lifting lever 14, thepresser bar 13 is moved vertically in synchronization with this operation in the arrow direction H. As the user operates thepresser lifting lever 14, thepresser bar 13 can be fixedly and temporarily set in a zeroth level which is a typical needlework position, a first level higher than the zeroth level, and a second level higher than the first level in the arrow direction H, by means of thepresser lifting lever 14. An upper thread tension adjuster (not shown) is mounted in thesewing machine body 2. At the zeroth level, in order to perform a typical needlework, the upper thread is activated (tensioned). At the first level, the upper thread is inactivated (distensioned). At the second level, the upper thread is activated (tensioned). In this manner, when thepresser lifting lever 14 and thepresser bar 13 are at the zeroth level, thepresser bar 13 is located lower than the first level so that a typical needlework can be performed. When thepresser lifting lever 14 and thepresser bar 13 are at the first level, the upper thread is inactivated and distensioned so that the user is allowed to arbitrarily move a cloth as a target workpiece on theneedle plate 23. When thepresser lifting lever 14 and thepresser bar 13 are at the second level, thepresser bar 13 is lifted above the first level. Therefore, the lower end portion of thepresser bar 13 is lifted so that the user does not have to care about contact between the embroidery frame and the lower end portion of thepresser bar 13, and the user can perform free-hand embroidery (a mode in which the user does embroidery by moving the embroidery frame with a hand) by arbitrarily moving the embroidery frame on theneedle plate 23. In the sewing machine having such a function, when the embroidery is performed, theembroidery presser 3 according to the present embodiment is detachably provided in the lower end portion of thepresser bar 13. According to the present embodiment, in general, when theembroidery presser 3 according to the present embodiment is attached to thelower end portion 13d of thepresser bar 13 using afixture 30, thepresser lifting lever 14 is set in the second level S2, and thepresser bar 13 is lifted to the second level in the arrow direction H (seeFigs. 5A and 5B ). The main reason of that is to set thepresser lifting lever 14 to the second level S2 during embroidery and facilitate the attachment work by increasing a space between the lower end portion of thepresser bar 13 and theneedle plate 23. -
Fig. 3 illustrates a state that theembroidery presser 3 is exploded.Fig. 4 illustrates a state that theembroidery presser 3 is assembled. Theembroidery presser 3 includes: apresser holder 31 attached to the lower end portion 3d of thepresser bar 13 using afixture 30; anoperational arm 39 attached to thepresser holder 31 to vertically move in the height direction (arrow direction H) along with theneedle bar 1 and theneedle holder 11; apresser foot 33 vertically movably held in thepresser holder 31 to press a target workpiece; a coil-shapedpresser spring 34 attached to thepresser holder 31; and asubsidiary lever 4 pivotably attached to thepresser holder 31 and pivotably operated by the user's finger. - As shown in
Fig. 3 , thepresser holder 31 includes: along hole 31a extending in the height direction (arrow direction H); an upper guard portion 31c having an upper through-hole 31b; a lower guard portion 31f having a lower through-hole 31e, apivot axis 32h, astopper 32s, and a fixingportion 32t where thefixture 30 is screwably attached. As a shown inFig. 3 , thesubsidiary lever 4 includes: acylindrical portion 40c which forms apivot hole 40 serving as a rotation center of thesubsidiary lever 4; acam surface 42 having a cam profile for vertically moving theoperational arm 39 in response to pivoting; a fixingtrench 44 formed on thecam surface 42, and an operatingportion 45 operated by the user's finger. Thecam surface 42 includes cam surfaces 42a and 42b in both sides of the fixingtrench 44. - The
pivot hole 40 and thepivot axis 32h are rotatably fitted together such that thefirst spring 46 is interposed between theholder 31 and thesubsidiary lever 4 to attach thesubsidiary lever 4 in theholder 31. Thefirst spring 46 is a torsion coil spring and includes anarm 46a latched to theholder 31 and anarm 46c latched to thesubsidiary lever 4. Thefirst spring 46 exerts a biasing force for biasing the operatingportion 45 of thesubsidiary lever 4 downward (in the arrow direction F ofFig. 4 ). As a result, thefirst spring 46 exerts a biasing force for biasing thepresser foot 33 to theneedle plate 23 downward (in the arrow direction D) at all times (seeFigs. 5 to 8 ). Meanwhile, thesubsidiary lever 4 biased by thefirst spring 46 is pivoted downward (arrow direction F) until astopper target 4s thereof abuts on thestopper 32s. - The
presser foot 33 is made of a transparent material (such as transparent resin, preferably, having high transparency). As shown inFig. 3 , thepresser foot 33 includes: ashaft portion 33b having ashaft hole 33a where thelower end portion 35p of thepresser shaft 35 is fitted; abottom portion 33e having aneedle hole 33c where a needle is inserted; and atransparent cover wall 33h erected above thebottom portion 33e to face the user. Since thecover wall 33h is transparent, it is possible to obtain visibility of a needle tip. Furthermore, thecover wall 33h prevents the user's finger from touching the needle and the like. Moreover, when the needle breaks, it prevents the needle from being scattered to the user. Thecover wall 33h faces the user positioned in front of the sewing machine but is not formed in the lateral direction (arrow direction X inFig. 4 ). Therefore, thecover wall 33h does not hinder work for threading theneedle 10. - As shown in
Fig. 3 , thepresser shaft 35 is provided to extend in the height direction and includes anupper hole 35a, alatch groove 35c where asnap ring 35b is fitted, and alower hole 35d in order from the upper end to the lower end of thepresser shaft 35. Thespring pin 37 is inserted into theattachment hole 33x of thepresser foot 33 and thelower hole 35d of thepresser shaft 35, and as a result, thepresser foot 33 is attached to thelower end portion 35p of thepresser shaft 35. In addition, thepresser foot 33 and thepresser shaft 35 may be integrated into a single body. An upper portion of thepresser shaft 35 is fitted to the lower through-hole 32e and the upper through-hole 31b while the coil-shapedpresser spring 34 is interposed between the upper guard portion 31c and the lower guard portion 31f. Thepresser spring 34 is formed from a coil spring and is elastically contractably compressed between thesnap ring 35b and the upper guard portion 31c to exert a biasing force for biasing thepresser bar 13 and thepresser foot 33 downward (in the arrow direction D), that is, toward the needle plate. - As shown in
Fig. 3 , theoperational arm 39 is bent in a crank shape by thebent portion 39a and includes aleading end portion 39c and abase end portion 39d. Theoperational arm 39 may not be bent necessarily. Theleading end portion 39c of theoperational arm 39 is inserted into theupper hole 35a of thepresser shaft 35 and penetrates thelong hole 31a toward thesubsidiary lever 4 side. Since theleading end portion 39c is fitted to thelong hole 31a, it can be moved vertically in the height direction (arrow direction H) along thelong hole 31a. However, displacement in a horizontal direction is prevented, and thepresser shaft 35 is not pivoted in the central axis direction. - As shown in
Fig. 4 , while theembroidery presser 3 is assembled and attached, theleading end portion 39c of theoperational arm 39 is exposed upward from the upper guard portion 31c, along with theupper end portion 35u of thepresser shaft 35. In addition, theleading end portion 39c of theoperational arm 39 faces thecam surface 42 while it is located above thecam surface 42 of thesubsidiary lever 4. In this case, as recognized fromFig. 4 , since a biasing force of the coil-shapedpresser spring 34 is applied downward (in the arrow direction D), thesnap ring 35b of thepresser shaft 35 contacts the upper surface of the lower guard portion 31f, and theleading end portion 39c of the operatingportion 45 contacts the surface of the upper guard portion 31c. In this state, theleading end portion 39c faces thecam surface 42 of the subsidiary lever 4 (seeFig. 4 ). - For this reason, when the
subsidiary lever 4 is pivoted in the arrow direction B and the arrow direction F with respect to thepivot hole 40, thecam surface 42 can vertically move theleading end portion 39c of the operatingportion 45 in the height direction (arrow direction H) along thelong hole 31a. As theleading end portion 39c of the operatingportion 45 is vertically moved along thelong hole 31a, thepresser shaft 35 and thepresser foot 33 are vertically moved in synchronization in the same direction. Theleading end portion 39c of theoperational arm 39 is engaged with the fixingtrench 44 while it moves along thecam surface 42 so that it can be temporarily set in the fixingtrench 44. As described below, the fixingtrench 44 is engaged with theleading end portion 39c of theoperational arm 39 so as to temporarily set thepresser foot 33 in the first height position M1 thereof. In the first height position M1, thebottom portion 33e of thepresser foot 33 is maintained in a raised state from theneedle plate 23 by a gap dimension B5 (seeFig. 6A and Fig. 6B ). - Next, how to attach and use the
embroidery presser 3 will be described with reference toFigs. 5 to 7 . In any ofFigs. 5 to 7 , thepresser lifting lever 14 is set in the second level S2, and thepresser bar 13 is held in the second level position and is raised from theneedle plate 23. -
Figs. 5A and 5B illustrate a state that thesubsidiary lever 4 is lowered by thefirst spring 46 and is set in the embroiderable position P1. When thesubsidiary lever 4 is set in the embroiderable position P1, thebottom portion 33e of thepresser foot 33 is biased downward (in the arrow direction D)by the biasing force of thepresser spring 34 so as to press theneedle plate 23. Therefore, a cloth (target workpiece) is interposed and fixed between theneedle plate 23 and thebottom portion 33e of thepresser foot 33. As shown inFigs. 5A and 5B , when thesubsidiary lever 4 is set in the embroiderable position P1, a gap dimension A3 (seeFig. 5B ) is generated between thecam surface 42 of thesubsidiary lever 4 and theleading end portion 39c of theoperational arm 39. Therefore, theleading end portion 39c is located above thecam surface 42 and does not contact thecam surface 42. In this manner, when thesubsidiary lever 4 is set in the embroiderable position P1 (seeFig. 5B ), a distance W1 (seeFig. 5B ) is formed between theleading end portion 39c of theoperational arm 39 and the upper end 31au of thelong hole 31a. For this reason, since theoperational arm 39 can be further lifted along thelong hole 31a of theholder 31, thepresser foot 33 can be further lifted relatively. As shown inFigs. 5A and 5B , if the sewing machine is activated when thesubsidiary lever 4 is set in the embroiderable position P1, similar to the related art, thepresser foot 33 is lifted once in one cycle of the vertical movement of theneedle bar 1, and the pressing force of a cloth on theneedle plate 23 is lost. Therefore, the user can freely move a cloth on theneedle plate 23 while the user does embroidery on the cloth so as to perform needlework such as embroidery. - As shown in
Figs. 5A and 5B , if the vertical movement distance of thepresser foot 33 is large in the needlework such as embroidery when thesubsidiary lever 4 is set in the embroiderable position P1, thepresser foot 33 significantly and moves vertically in the arrow direction H, and this may hinder the user's view. In this regard, according to the present embodiment, as shown inFig. 1 , theneedle holder 11 is vertically moved in the arrow direction H between the bottom dead point and the top dead point thereof, but theoperational arm 39 is located a small distance ΔH (for example, 0.2 to 2.0 millimeters) lower than the top dead point of theneedle holder 11. For this reason, even when theneedle holder 11 is lifted in the height direction (arrow direction H) along with theneedle bar 1 during embroidery, the vertical movement distance of theoperational arm 39 lifted by theneedle holder 11 is a small distance ΔH relative to the vertical movement distance of theneedle holder 11. Furthermore, the lifting distance of thepresser foot 33 of theembroidery presser 3 is also insignificant, and particularly, it does not hinder the user's view. In addition, although theoperational arm 39 is also lowered when theneedle holder 11 is lowered to the bottom dead point, thepresser foot 33 reaches theneedle plate 23, so that it is not further lowered beyond ΔH. - In addition, during needlework such as embroidery, as recognized from
Fig. 1 , theneedle bar 1 is vertically moved between the top dead point and the bottom dead point thereof in the arrow direction H. Similarly, theneedle holder 11 held in theneedle bar 1 to fix theneedle 10 is also vertically moved between the top dead point and the bottom dead point thereof. Even when theneedle holder 11 is lowered to the bottom dead point thereof, theneedle holder 11 does not collide with thepresser foot 33 of theembroidery presser 3 on theneedle plate 23. In addition, theneedle holder 11 includes aneedle holding body 11a and aneedle holding screw 11c (seeFig. 1 ). - If the user moves the
subsidiary lever 4 further upward (in the arrow direction B) with a finger from the embroiderable position P1 by an angle B1 (seeFig. 6B ) in the state ofFigs. 5A and 5B , thesubsidiary lever 4 is set in the temporarily setting position P2. In this process, theoperational arm 39 is moved along thecam surface 42a of thesubsidiary lever 4 and is lifted upward (in the arrow direction U), and theleading end portion 39c of theoperational arm 39 is lifted along thelong hole 31a. As a result, thepresser foot 33 vertically moving in synchronization with theoperational arm 39 is also lifted in the arrow direction U, and theleading end portion 39c of theoperational arm 39 is engaged with the fixingtrench 44 and is temporarily set (seeFig. 6B ). That is, thesubsidiary lever 4 is set in the temporary setting position P2. In this case, thebottom portion 33e of thepresser foot 33 is temporarily set in the first height position M1 thereof (seeFig. 6B ). - In this manner, while the
subsidiary lever 4 is set in the temporary setting position P2, an engagement dimension B4 (seeFig. 6B ) corresponds to the engagement amount between theleading end portion 39c of theoperational arm 39 and the trench bottom surface of the fixingtrench 44. In this manner, while thesubsidiary lever 4 is set in the temporary setting position P2, thesubsidiary lever 4 is not pivoted downward (arrow direction F), in spite of the biasing force of thepresser spring 34 and thefirst spring 46, even when the user removes a finger from the operatingportion 45 of thesubsidiary lever 4. Therefore, thesubsidiary lever 4 is temporarily set in the temporary setting position P2 pivoted upward by an angle B1 from the embroiderable position P1. - In this manner, in the process of lifting the
operational arm 39, thepresser shaft 35 and thepresser foot 33 integrated with theoperational arm 39 are lifted in the arrow direction U and are raised from theneedle plate 23, against the biasing force directed to the arrow direction D of thepresser spring 34. As a result, thebottom portion 33e of thepresser foot 33 is set in the first height position M1 (seeFigs. 6A and 6B ), and a gap dimension B5 is formed between thebottom portion 33e of thepresser foot 33 and the needle plate 23 (seeFig. 6A and Fig. 6B ). In this manner, when thesubsidiary lever 4 is set in the temporary setting position P2, the gap dimension B5 is formed. For this reason, the user can cause the embroidery frame which tightens the embroidery cloth to pass through a space under thebottom portion 33e of thepresser foot 33 on theneedle plate 23 without lifting thesubsidiary lever 4 or thepresser foot 33 with a finger. Therefore, it is possible to set the embroidery frame on a sewing machine bed in a simple manner. - In other words, as shown in
Figs. 6A and 6B , while thesubsidiary lever 4 is set in the temporary setting position P2, theleading end portion 39c of theoperational arm 39 is engaged with the fixingtrench 44 and is temporarily set, and thesubsidiary lever 4 is not pivoted downward (arrow direction F) even when the user removes a finger from the operatingportion 45 of thesubsidiary lever 4 of theembroidery presser 3. In addition, a gap dimension B5 is formed between thebottom portion 33e of thepresser foot 33 and theneedle plate 23. As a result, it is possible to facilitate work for attaching or removing theembroidery presser 3 to or from thelower end portion 13d of thepresser bar 13. It is preferable to perform the attachment/removal work of theembroidery presser 3 while thesubsidiary lever 4 is temporarily set as shown inFigs. 6A and 6B because it provides best efficiency. - In addition, sometimes, an embroidery frame having a height dimension equal to or greater than the gap dimension B5 may be used. In this case, if the user further upward (in the arrow direction B) pivots the operating
portion 45 of thesubsidiary lever 4 with a finger in the state ofFigs. 6A and 6B , that is, if thesubsidiary lever 4 is further lifted from the embroiderable position P1 thereof by an angle C1, theoperational arm 39 is further lifted along thecam surface 42b of thesubsidiary lever 4. In this case, thepresser foot 33 and thepresser shaft 35 integrated with theoperational arm 39 are also lifted in synchronization in the arrow direction U. As a result, as shown inFigs. 7A and 7B , thepresser foot 33 is further raised from theneedle plate 23 and is set in the second height position M2. In this case, a wider gap dimension C2 (C2>B5) is formed between thebottom portion 33e of thepresser foot 33 and theneedle plate 23. In this manner, since a wide gap dimension C2 is formed, even a thick embroidery frame can pass through a space under thebottom portion 33e of thepresser foot 33 on theneedle plate 23. Therefore, it is possible to also facilitate setting of a thick embroidery frame. - However, while the
presser foot 33 is set in the second height position M2 as shown inFigs. 7A and 7B , theoperational arm 39 and the fixingtrench 44 are not engaged. As a result, as the user removes a finger from the operatingportion 45 of thesubsidiary lever 4 of theembroidery presser 3, thesubsidiary lever 4 is automatically pivoted downward (arrow direction F) by virtue of the biasing force of thefirst spring 46, and thesubsidiary lever 4 is set in a temporary setting position P2 (seeFig. 6B ) so that thepresser foot 33 is projected downward by virtue of the biasing force of thepresser spring 34. - In this manner, the reason the
subsidiary lever 4 is returned downward to the temporary setting position P2 is as follows. That is, this is to prevent contact between theembroidery presser 3 and theneedle holder 11 held in theneedle bar 1 and prevent damage even when theneedle bar 1 is lowered and reaches the bottom dead point. Therefore, the gap dimension B5 is previously set to a size capable of preventing contact between theneedle holder 11 and theembroidery presser 3 even when theneedle bar 1 is lowered and reaches the bottom dead point. In this manner, since theoperational arm 39 and the fixingtrench 44 are not engaged in the state ofFigs. 7A and 7B , thesubsidiary lever 4 is pivoted downward (arrow direction F) by virtue of the biasing force of thefirst spring 46 and is returned to the state ofFigs. 6A and 6B as the user removes a finger from thepresser foot 33 or the operatingportion 45 of thesubsidiary lever 4 of theembroidery presser 3. For this reason, even when the user erroneously lowers theneedle bar 1 by activating the sewing machine, theneedle holder 11 attached to theneedle bar 1 and thebottom portion 33e of thepresser foot 33 do not contact each other, and it is possible to prevent damage of theneedle holder 11 or thepresser foot 33 caused by contact. - According to the present embodiment, when the user prepares embroidery such as free-hand embroidery, the
embroidery presser 3 is attached to thelower end portion 13d of thepresser bar 13 using a fixture 30 (seeFig. 1 ) while thepresser bar 13 is set in the second level by holding thepresser lifting lever 14 in the second level S2 as described above. As a result, the state ofFigs. 6A, 6B ,7A, or 7B is obtained. In the state ofFigs. 6A and 6B , since the gap dimension B5 is formed between theneedle plate 23 and thebottom portion 33e of thepresser foot 33, the embroidery frame can pass through a space between thepresser foot 33 and theneedle plate 23 and can be set. As thesubsidiary lever 4 is lowered from the temporary setting position P2 in the arrow direction F by an angle B1 after the passage, thesubsidiary lever 4 is set in the embroiderable position P1 (seeFigs. 5A and 5B ), and embroidery can be performed. - In addition, in the state of
Figs. 7A and 7B , since a wider gap dimension C2 (C2>B5) is formed between thebottom portion 33e of thepresser foot 33 and theneedle plate 23, a thick embroidery frame can pass through a space between thepresser foot 33 and theneedle plate 23 and can be set. Therefore, as the user lowers thesubsidiary lever 4 in the arrow direction F after the passage, thesubsidiary lever 4 can be set in the embroiderable position P1 (seeFigs. 5A and 5B ), and embroidery can be performed. - Meanwhile, in the user's actual operation, it is preferable to prepare a counter measure in advance by anticipating the user's error. In actual operation, it is anticipated that the user does not lower the
subsidiary lever 4 for lowering theembroidery presser 3, but may carelessly operate the liftinglever 14 to be lowered. This case is shown inFigs. 8A and 8B. Fig. 8A illustrates a state that the user pivotes thepresser lifting lever 14 from the second level S2 by an angle D1 and erroneously lowers thepresser lifting lever 14 to the first level S1. In this state, although thepresser bar 13 is also slightly lowered as thepresser lifting lever 14 is operated, thepresser foot 33 of theembroidery presser 3 is also lowered accordingly. However, as shown inFig. 8A , thebottom portion 33e of thepresser foot 33 does not abut on theneedle plate 23, and a gap dimension D5(D5<B5) is formed between thepresser foot 33 and theneedle plate 23. For this reason, a force that separates theleading end portion 39c of theoperational arm 39 from the fixingtrench 44 is not generated. Therefore, theoperational arm 39 is still engaged with the fixing trench 44 (seeFig. 8A ). - In comparison,
Fig. 8B illustrates a state that the user erroneously lowers thepresser lifting lever 14 to the zeroth level S0 by pivoting thepresser lifting lever 14 from the second level S2 by an angle E1. In this state, although thepresser bar 13 is considerably lowered in synchronization with the downward operation of thepresser lifting lever 14, thebottom portion 33e of thepresser foot 33 contacts theneedle plate 23 accordingly. Therefore,presser bar 13 is lifted relatively in the arrow direction U against the biasing force of thepresser spring 34. Furthermore, thepresser foot 33, thepresser shaft 35, and theoperational arm 39 are lifted relatively in the arrow direction U with respect to thepresser holder 31. Consequently, theleading end portion 39c of theoperational arm 39 is separated from the fixingtrench 44 and approaches the upper end 31au of thelong hole 31a (seeFig. 8B ). Since the lifting distance in this case is greater than the engagement dimension B4 of theoperational arm 39 shown inFig. 6A and Fig. 6B , theleading end portion 39c of theoperational arm 39 is separated from the fixingtrench 44 of thecam surface 42 as described above. In this manner, as theoperational arm 39 is separated from the fixingtrench 44, thesubsidiary lever 4 is automatically pivoted downward (arrow direction F) by virtue of the biasing force of thefirst spring 46 and thepresser spring 34 so that thesubsidiary lever 4 is automatically switched to the embroiderable position P1 (seeFig. 8B ), and thepresser foot 33 is projected downward. As a result, as the user returns thepresser lifting lever 14 to the second level S2 (in the embroidery mode, a tension of the upper thread is activated) again, thepresser bar 13 is lifted to the second level in the arrow direction U and automatically becomes the state ofFigs. 5A and 5B (embroiderable state). Therefore, the user can immediately perform embroidery. - As described above, according to the present embodiment, when embroidery such as free-hand embroidery is performed, as a preparation thereof, the
presser lifting lever 14 is pivotably operated and temporarily set in order to prevent thepresser bar 13 from falling. This is because, in this sewing machine, the embroidery mode is set when thepresser bar 13 is temporarily set in the second level as described above. In this manner, the user can manually attach theembroidery presser 3 in thelower end portion 13d of thepresser bar 13 while thepresser bar 13 is temporarily set in a high position. - In this case, the
operational arm 39 of theembroidery presser 3 is engaged with the fixingtrench 44 of thecam surface 42 of thesubsidiary lever 4 and is temporarily set. In this state, thepresser foot 33 is moved to thepresser holder 31 side against the biasing force of thepresser spring 34 and thepresser spring 34. As a result, a height dimension HA (seeFigs. 6A and 6B ) of theembroidery presser 3 is reduced. In this case, thebottom portion 33e of thepresser foot 33 is prevented from moving so as to be significantly projected from thepresser holder 31 by the biasing force of thepresser spring 34. As a result, it is possible to abolish work for reducing a height dimension HA of theembroidery presser 3 by manually moving thepresser foot 33 of theembroidery presser 3 toward thepresser holder 31 side in order to attach and remove theembroidery presser 3. Therefore, it is possible to obtain freedom in user's hand operation and improve efficiency. - In addition, as long as the
operational arm 39 of theembroidery presser 3 is fitted to the fixingtrench 44 of thesubsidiary lever 4 and is temporarily set, free pivoting of thesubsidiary lever 4 is prevented. Therefore, it is possible to further improve efficiency. Furthermore, if theoperational arm 39 is engaged with the fixingtrench 44 of thecam surface 42 of thesubsidiary lever 4 and is temporarily set, thesubsidiary lever 4 is moved upward to be separated from theneedle plate 23 to increase a space HE between theneedle plate 23 and the operatingportion 45 of thesubsidiary lever 4 as recognized fromFig. 6B . Therefore, it is possible to easily attach theembroidery presser 3 in thepresser bar 13 with excellent efficiency. - While the user attaches the
embroidery presser 3 in thepresser bar 13, as shown inFigs. 6A and 6B , thepresser foot 33 is maintained in the second height position M2, and a gap dimension B5 between thepresser foot 33 and theneedle plate 23 is also held. As a result, it is not necessary for the user to perform a cumbersome work for lifting thepresser foot 33 attached to thepresser bar 13 from theneedle plate 23, and this facilitates setting of the embroidery frame by immediately passing the embroidery frame through the gap dimension B5. In this sense, it is possible to further improve efficiency. In the case of a thick embroidery frame, a wider gap dimension C2 (seeFigs. 7A and 7B ) is formed by pivoting thesubsidiary lever 4 upward, as described above. - In addition, according to the present embodiment, since the
embroidery presser 3 has atransparent cover wall 33h facing the user who operates the sewing machine, it is possible to prevent the user's finger from erroneously touching theneedle 10 during needlework such as embroidery and improve user protection. Furthermore, even when the needle breaks during embroidery, it is possible to improve a barrier effect for the broken and scattered needle fragments and prevent the broken needle from being scattered toward the user by means of thecover wall 33h. As inReference 3, thecover wall 33h may be attached to the sewing machine bed side. However, in this case, both work for attaching theembroidery presser 3 and work for attaching thecover wall 33h are necessary. However, according to the present embodiment, thetransparent cover wall 33h is integrated with theembroidery presser 3 as a single body as described above. Therefore, if theembroidery presser 3 is attached to thelower end portion 13d of thepresser bar 13, thetransparent cover wall 33h for protecting the user can be automatically attached. Therefore, it is possible to obtain excellent efficiency. - As described above, according to the present embodiment, even when the
needle holder 11 is moved vertically in the height direction (arrow direction H) along with theneedle bar 1 during embroidery, the lifting distance of theembroidery presser 3 lifted by theneedle holder 11 is a small distance ΔH, compared to the vertical movement distance of theneedle holder 11. In addition, the vertical movement distance of thecover wall 33h is also insignificant, and it does not hinder the user's view. As a result, it is possible to increase a size of thecover wall 33h and improve user protection in this sense. - Although the
presser bar 13 is lifted to the second level when theembroidery presser 3 is attached to the lower end portion of thepresser bar 13 using a fixture according to the aforementioned embodiment, this disclosure is not limited thereto. Instead, thepresser bar 13 may be lifted to the first level. Although thepresser spring 34 is a coil spring, other springs such as a torsion coil spring and a plate spring may be used. Although thepresser foot 33 has atransparent cover wall 33h, thecover wall 33h may not be provided. According to the aforementioned embodiment, thepresser bar 13 can be fixedly and temporarily set in the zeroth level which is a typical needlework position (upper thread is tensioned), the first level (upper thread is distensioned) higher than the zeroth level, and the second level (upper thread is tensioned) higher than the first level using thepresser lifting lever 14. However, such a sewing machine is by no means limiting, and this disclosure may be applied to other types of sewing machines, for example, if it can temporarily set thepresser bar 13 in a predetermined height position in order to attach theembroidery presser 3. Although theoperational arm 39 is moved vertically using theneedle holder 11 of theneedle bar 1, theoperational arm 39 may be directly moved vertically using theneedle bar 1 without theneedle holder 11. This disclosure is not limited to the embodiments and the drawings described above, but may be changed or modified appropriately without departing from the spirit and scope of this disclosure.
Claims (7)
- A sewing machine embroidery presser attached to a presser bar, in a sewing machine including a needle bar that has a needle holder for holding a needle and is vertically movable in the height direction, a presser bar vertically movable in the height direction, and a presser lifting lever for vertically moving the presser bar, the sewing machine embroidery presser comprising:a presser holder attached to a lower portion of the presser bar using a fixture;an operational arm that is attached to the presser holder and moved vertically by the needle bar or the needle holder to vertically move in the height direction;a presser foot that is vertically movably held by the presser holder to move in synchronization with the operational arm, faces a needle plate of the sewing machine, and presses a target workpiece;a presser spring that is provided in the presser holder and has a biasing force for biasing the presser foot toward the needle plate; anda subsidiary lever pivotably provided in the presser holder, the subsidiary lever including a cam surface having a cam profile for vertically moving the operational arm in response to pivoting, a fixing trench that engages with the operational arm to move the presser foot to the presser holder side and temporarily set the presser foot in a first height position raised from the needle plate, and an operating portion operated by the user's finger.
- The sewing machine embroidery presser according to claim 1, wherein the operational arm is mounted on the needle holder and is vertically movable in the height direction in synchronization with a vertical movement of the needle bar along with the needle holder, when the needle bar is moved vertically along with the needle holder, and the presser foot is vertically movable in the height direction in synchronization with the operational arm.
- The sewing machine embroidery presser according to claim 1 or claim 2, wherein the operational arm is located a predetermined distance ΔH below the top dead point of the needle holder that moves vertically, and the lifting distance of the operational arm is set smaller than the lifting distance from the bottom dead point to the top dead point of the needle holder.
- The sewing machine embroidery presser according to any one of claims 1 to 3, further comprising a first spring for biasing the subsidiary lever to an embroiderable position by pivoting the presser foot downward toward the needle plate of a sewing machine bed.
- The sewing machine embroidery presser according to any one of claims 1 to 4, wherein:the presser foot is vertically movable by pivoting operation of the subsidiary lever to an embroidery height position where embroidery is performed, a first height position higher than the embroidery height position, where the presser foot is raised from the needle plate, and a second height position higher than the first height position, where the presser foot is raised from the needle plate; anda cam profile of the cam surface of the subsidiary lever is formed to sequentially lift the presser foot to the embroidery height position, the first height position, and the second height position in response to rotation operation of the subsidiary lever by the user, and lower the operational arm toward the needle plate as the rotation operation of the subsidiary lever by the user is released.
- The sewing machine embroidery presser according to any one of claims 1 to 5, wherein the presser foot has a transparent cover wall erected to face the user who operates the sewing machine.
- A sewing machine comprising the sewing machine embroidery presser according to any one of claims 1 to 6.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011099544A JP5810606B2 (en) | 2011-04-27 | 2011-04-27 | Sewing machine embroidery presser and sewing machine |
Publications (3)
Publication Number | Publication Date |
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EP2518200A2 true EP2518200A2 (en) | 2012-10-31 |
EP2518200A3 EP2518200A3 (en) | 2015-06-10 |
EP2518200B1 EP2518200B1 (en) | 2016-08-10 |
Family
ID=46044463
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12165469.3A Not-in-force EP2518200B1 (en) | 2011-04-27 | 2012-04-25 | Sewing machine embroidery presser and sewing machine |
Country Status (3)
Country | Link |
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EP (1) | EP2518200B1 (en) |
JP (1) | JP5810606B2 (en) |
CN (1) | CN202913202U (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770099A1 (en) * | 2013-02-22 | 2014-08-27 | Aisin Seiki Kabushiki Kaisha | Embroidery presser of sewing machine |
CN110485078A (en) * | 2019-07-10 | 2019-11-22 | 浙江信胜科技股份有限公司 | A kind of device and embroidery machine with auxiliary presser foot and presser feet safeguard function |
CN113502615A (en) * | 2021-05-28 | 2021-10-15 | 浙江信胜科技股份有限公司 | Looper head separation piece shifts manipulator lock rope device and embroidery machine |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP6331434B2 (en) * | 2014-02-05 | 2018-05-30 | アイシン精機株式会社 | Embroidery sewing machine presser device |
JP6478700B2 (en) * | 2015-02-25 | 2019-03-06 | 蛇の目ミシン工業株式会社 | Feed dog attaching / detaching device and sewing machine equipped with the feed dog attaching / detaching device |
JP3202819U (en) * | 2015-12-11 | 2016-02-25 | 蛇の目ミシン工業株式会社 | Sewing machine lifting device |
CN111118766B (en) * | 2020-03-21 | 2021-04-02 | 浙江镨美科智能刺绣设备有限公司 | Three-dimensional ring embroidery method and embroidery control device for rope-thread-shaped ornaments of embroidery machine |
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JP2005058360A (en) | 2003-08-08 | 2005-03-10 | Brother Ind Ltd | Cloth presser foot mechanism of embroidery sewing machine |
JP2006263272A (en) | 2005-03-25 | 2006-10-05 | Brother Ind Ltd | Safety cover for sewing machine |
JP2006263170A (en) | 2005-03-24 | 2006-10-05 | Brother Ind Ltd | Embroidery presser for embroidery sewing machine |
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JP2006014835A (en) * | 2004-06-30 | 2006-01-19 | Brother Ind Ltd | Sewing machine |
JP2009112325A (en) * | 2007-11-01 | 2009-05-28 | Brother Ind Ltd | Presser foot device for sewing machine and sewing machine |
JP5574163B2 (en) * | 2010-05-28 | 2014-08-20 | アイシン精機株式会社 | sewing machine |
-
2011
- 2011-04-27 JP JP2011099544A patent/JP5810606B2/en not_active Expired - Fee Related
-
2012
- 2012-04-25 EP EP12165469.3A patent/EP2518200B1/en not_active Not-in-force
- 2012-04-27 CN CN 201220188518 patent/CN202913202U/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2005058360A (en) | 2003-08-08 | 2005-03-10 | Brother Ind Ltd | Cloth presser foot mechanism of embroidery sewing machine |
JP2006263170A (en) | 2005-03-24 | 2006-10-05 | Brother Ind Ltd | Embroidery presser for embroidery sewing machine |
JP2006263272A (en) | 2005-03-25 | 2006-10-05 | Brother Ind Ltd | Safety cover for sewing machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2770099A1 (en) * | 2013-02-22 | 2014-08-27 | Aisin Seiki Kabushiki Kaisha | Embroidery presser of sewing machine |
CN110485078A (en) * | 2019-07-10 | 2019-11-22 | 浙江信胜科技股份有限公司 | A kind of device and embroidery machine with auxiliary presser foot and presser feet safeguard function |
CN110485078B (en) * | 2019-07-10 | 2024-03-12 | 浙江信胜科技股份有限公司 | Device with auxiliary presser foot and presser foot protection function and embroidery machine |
CN113502615A (en) * | 2021-05-28 | 2021-10-15 | 浙江信胜科技股份有限公司 | Looper head separation piece shifts manipulator lock rope device and embroidery machine |
CN113502615B (en) * | 2021-05-28 | 2022-07-22 | 浙江信胜科技股份有限公司 | Looper head separation piece shifts manipulator lock rope device and embroidery machine |
Also Published As
Publication number | Publication date |
---|---|
JP2012228431A (en) | 2012-11-22 |
EP2518200B1 (en) | 2016-08-10 |
CN202913202U (en) | 2013-05-01 |
JP5810606B2 (en) | 2015-11-11 |
EP2518200A3 (en) | 2015-06-10 |
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