JP2014204830A - Embroidery cloth presser device for sewing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lengthen time in which an embroidery cloth presser member is pressing an embroidery cloth during one cycle of a needle bar vertical motion, and also to raise the embroidery cloth presser member to desired height after releasing the embroidery cloth pressing.SOLUTION: An embroidery cloth presser device includes: a vertically movable needle bar 41; an embroidery cloth presser member 43 for pressing an embroidery cloth W; a holder member 46 for holding the embroidery cloth presser member in a vertically movable manner via an elastic member 45; a presser raising operation lever 48 for switching a holding position of the holder member for holding the embroidery cloth presser member manually so that the embroidery cloth presser member is set to be in one of a pressing position for pressing the embroidery cloth W and a pressing release position for releasing the pressing of the embroidery cloth W; and a drive mechanism for driving the embroidery cloth presser member in such a manner that the embroidery cloth presser member rises by a rising stroke surpassing the needle bar against a resilient force of the elastic member with respect to the holder member being interlocked with a rising motion of the needle bar, in a state where the embroidery cloth presser member is set in the pressing position by the switch of the holding position of the holder member by the presser raising operation lever.

Description

  The present invention relates to a sewing machine embroidery cloth presser device for pressing an embroidery cloth in a sewing machine.

  Conventionally, for example, the following Patent Documents 1 to 4 each disclose a technique related to a sewing machine including an embroidery cloth presser. In the sewing machine embroidery cloth presser described in the cited document 1, the embroidery cloth presser member holds the embroidery cloth while the sewing needle held by the needle bar passes through the embroidery cloth, while the sewing needle is embroidered. When it comes out of the cloth, it rises in conjunction with the needle bar to release the embroidery cloth presser. The sewing machine embroidery presser device described in the cited documents 2 and 3 includes a mechanism for raising the embroidery presser member with respect to the holder member when the presser bar is lifted in conjunction with the operation of the presser lifting operation lever. Yes. The sewing machine described in the cited document 4 has a structure for outputting a phase signal corresponding to the movable period of the embroidery frame.

Japanese Utility Model Publication No. 62-32549 Japanese Patent No. 4623423 JP 59-77890 A Japanese Patent Laid-Open No. 5-212175

(Problems to be solved by the invention)
By the way, when designing this type of embroidery cloth presser for a sewing machine, when considering the embroidery work for a thick embroidery cloth or the operation of manually moving the embroidery frame on which the embroidery cloth is stretched, There is a demand for promptly raising the embroidery cloth presser member to a position as high as possible after releasing the embroidery cloth presser. Further, in order to prevent the embroidery cloth from flapping after the sewing needle has come out of the embroidery cloth, the time for which the embroidery cloth presser member is holding the embroidery cloth is delayed by delaying the embroidery cloth presser as much as possible. There is a request to make it longer. In particular, in a sewing machine equipped with a horizontal hook mechanism in which the outer hook rotates on a horizontal plane that intersects the vertical direction in which the needle bar operates, the embroidery cloth is easily pulled in the horizontal direction via the upper thread when the outer hook rotates. Therefore, when designing a sewing machine equipped with a horizontal shuttle mechanism, it is possible to lengthen the time during which the embroidery cloth presser member holds the embroidery cloth during one cycle of the needle bar up-and-down movement, and thereafter the embroidery cloth presser. There is a high demand for a technique that can reliably raise a member to a desired height.

  Here, in the case of the sewing machine embroidery cloth presser described in the cited document 1, the lift amount of the needle bar and the lift amount of the embroidery cloth presser member when the sewing machine needle comes out of the embroidery cloth are the same. Therefore, when the embroidery cloth presser member is raised to the desired height, the time for which the embroidery cloth is pressed is shortened. On the other hand, when the embroidery cloth presser member is pressed for a longer time, the embroidery cloth presser member is now desired. Cannot be raised to the height of However, in the case of adopting a structure in which the embroidery presser member rises with respect to the holder member in conjunction with the operation of the presser lifting operation lever, such as the embroidery presser device for a sewing machine described in the cited document 2, the user Since it is necessary to frequently operate the presser foot lifting operation lever, the operation is troublesome, and since manual operation by the user is a prerequisite, there is a limit to disadvantageously raising the embroidery cloth presser member quickly.

  Accordingly, the present invention has been made in view of the above points, and one of the purposes thereof is an embroidery cloth for a sewing machine in which an embroidery cloth presser member for pressing the embroidery cloth rises in conjunction with the raising operation of the needle bar. In the presser device, the time during which the embroidery cloth presser member presses the embroidery cloth during one cycle of the needle bar up-and-down movement can be lengthened, and the embroidery cloth presser member is moved to the desired height after releasing the embroidery cloth presser. It is to provide a technology that can be raised.

(Means for solving the problem)
To achieve the above object, an embroidery presser device for a sewing machine according to the present invention is attached to the sewing machine and includes a needle bar, an embroidery presser member, a presser lifting operation lever, and a drive mechanism. The needle bar is provided on the sewing machine frame so as to be movable up and down, and holds the sewing needle. The embroidery cloth presser member functions to hold the embroidery cloth. The holder member functions to hold the embroidery cloth presser member so as to be movable up and down via the elastic member. The presser foot lifting operation lever is a holder member for holding the embroidery cloth presser member so that the embroidery cloth presser member is set to either a presser position where the embroidery cloth presser member presses the embroidery cloth or a presser release position where the embroidery cloth presser is released. It fulfills the function of manually switching the holding position. When the embroidery cloth presser member is set to the presser position by switching the holding position of the holder member by the presser foot lifting operation lever, the embroidery cloth presser member moves relative to the holder member in conjunction with the lifting operation of the needle bar. The embroidery presser member is driven so as to rise with a rising stroke exceeding the needle bar against the elastic force of the elastic member.

  According to the sewing machine embroidery presser device described above, the embroidery presser member is moved during one cycle of the needle bar up-and-down movement by increasing the lift stroke of the embroidery presser member that rises in conjunction with the upward movement of the needle bar. Even if the time for holding the embroidery cloth is lengthened, the embroidery cloth holding member can be raised to a desired height thereafter. In this case, it is effective to prevent the embroidery cloth from flapping after the sewing needle comes out of the embroidery cloth and to stabilize the sewing quality. Further, since the embroidery cloth presser member automatically rises to a desired height, the user does not need to operate the presser foot lifting operation lever at all to raise the embroidery cloth presser member set at the presser position. Can be eliminated.

  In the sewing machine embroidery presser device according to the present invention, the drive mechanism preferably includes an action member, a stopper, and an engaging portion. The action member extends above the embroidery cloth presser member so as to cross the movement direction of the needle bar, and has one end connected to the embroidery cloth presser member via a support shaft. The stopper is provided on the sewing machine frame so as to face the other end of the action member above the action member. The engaging portion engages with an intermediate region between both end portions of the acting member from below during the raising operation of the needle bar, and the operating member is centered on the other end portion with the stopper being in contact with the other end portion of the acting member. It functions to urge the intermediate region upward so as to rotate. That is, the action member rotates with the other end and the stopper as a fulcrum (rotation center) according to the so-called “lever principle” by engaging with the stopper. The presser foot can be rapidly raised in a short time. As a result, the drive mechanism can be realized by a simple and inexpensive structure with a reduced number of parts.

  In the above-described sewing machine embroidery cloth presser according to the present invention, it is preferable that the action member is formed of an elastic body. Thereby, even when a simple structure in which one end portion of the action member is fixed to the support shaft is adopted, the action member can be appropriately rotated by elastic deformation of the action member. Moreover, the action member comprised with the elastic body is effective in suppressing the sound and vibration which arise at the time of the rotation operation.

  In the sewing machine embroidery cloth presser according to the present invention, the action member is preferably connected to the support shaft via a hinge mechanism that allows rotation about one end of the action member. Thereby, even when the action member is constituted by a rigid body or a low elastic body such as a metal material or a hard resin material, the action member can be appropriately rotated via the hinge mechanism arranged on the action member.

  In the sewing machine embroidery presser device according to the present invention, it is preferable that the engaging portion is constituted by a needle clamp for attaching the sewing needle to the needle bar. In this case, since the needle clamp also serves as the engaging portion, the number of parts can be further reduced.

  The sewing machine embroidery presser device according to the present invention is preferably mounted on a sewing machine having a horizontal shuttle mechanism. This horizontal hook mechanism pulls the loop of the upper thread inserted through the needle hole of the sewing needle in the horizontal direction while the outer hook that rotates on the horizontal plane that intersects the direction of movement of the needle bar makes one rotation. It is comprised so that the said capture | acquisition may be cancelled | released in the area | region beyond a defined shuttle hook after catching. The drive mechanism preferably drives the embroidery presser member when the rotational position of the outer hook reaches the hook crossing region. In the case of the horizontal hook mechanism, the embroidery cloth is easily pulled in the horizontal direction via the upper thread when the outer hook rotates, but according to this embroidery cloth presser for sewing machine, the time for the embroidery cloth presser member to hold the embroidery cloth is reduced. By making the length longer, it is possible to reliably prevent the embroidery cloth from flapping or being pulled by the upper thread, and to stabilize the sewing quality.

  As described above, according to the present invention, in the embroidery cloth presser for sewing machine in which the embroidery cloth presser member for pressing the embroidery cloth is lifted in conjunction with the upward movement of the needle bar, the needle bar up-and-down movement is performed for one cycle. In addition, the time during which the embroidery cloth presser member is pressing the embroidery cloth can be lengthened, and the embroidery cloth presser member can be raised to a desired height after releasing the embroidery cloth presser.

It is the external view which looked at sewing machine 10 concerning this embodiment from the front side where a user is located. FIG. 2 is a perspective view of the horizontal hook mechanism 30 in FIG. 1 viewed obliquely from above with the bobbin 19 mounted. FIG. 2 is a side view of the embroidery cloth presser device 40 in FIG. 1 as viewed from the right side, and shows a state in which a sewing needle N penetrates the embroidery cloth W. It is a figure which shows the raising process of the needle bar 41 in the embroidery cloth presser apparatus 40 in FIG. It is a top view of the horizontal shuttle mechanism 30 in case the needle bar 41 exists in the raise position of FIG. In the embroidery cloth presser device 40 in FIG. 3, it is a figure which shows the state when the raising stroke of the embroidery cloth presser member 43 is the maximum. It is a figure which shows the example of a change of the action member 49 in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows the appearance of a sewing machine 10 according to the present invention. 1 and other drawings, when the sewing machine 10 is viewed from the front side where the user is located, the left direction of the sewing machine 10 is the first direction indicated by the arrow X, and the forward direction of the sewing machine 10 is indicated by the arrow Y. The second direction is set, and the upward direction of the sewing machine 10 is a third direction indicated by an arrow Z.

  As shown in FIG. 1, the sewing machine 10 can perform both an embroidery process for embroidering an embroidery cloth (work cloth) stretched on an embroidery frame and a normal sewing process without using an embroidery frame. The sewing machine 10 is roughly divided into a sewing bed 11, a sewing machine arm 12 and a pedestal 13. The sewing machine bed 11 is a part that extends in the first direction X from the one end 13 a of the pedestal column 13. The sewing machine arm 12 is a part that extends in the first direction X in parallel with the sewing machine bed 11 from the other end 13 b of the columnar part 13 above the sewing machine bed 11. The pedestal portion 13 extends from the one end portion 11 a of the sewing machine bed 11 in the third direction Z and is connected to the one end portion 12 a of the sewing machine arm 12.

  A sewing machine motor 14 as a drive source of the sewing machine 10 is accommodated in one end 11 a of the sewing machine bed 11. The sewing machine arm 12 accommodates a main shaft 15 that is rotationally driven to move a sewing needle (not shown) up and down along the third direction Z by the power of the sewing machine motor 14. A power transmission mechanism (not shown) for transmitting the power of the sewing machine motor 14 to the main shaft 15 is accommodated in the pedestal 13.

  A needle plate 20 is provided on the upper surface 11 c of the other end portion 11 b of the sewing bed 11. A horizontal shuttle mechanism 30 for receiving the bobbin 19 for supplying the lower thread is provided below a needle plate lid 21 provided on the needle plate 20 so as to be openable and closable. As shown in FIG. 2, the horizontal hook mechanism 30 accommodates the outer hook 31 that rotates in a horizontal plane in conjunction with the rotation of the main shaft 15 and the bobbin 19 that is held by the outer hook 31 and is detachable. And an inner hook 34 as a bobbin housing member. The cylindrical inner hook accommodating portion 32 of the outer hook 31 accommodates the inner hook 34 and rotates counterclockwise on the horizontal plane in synchronization with the main shaft 15 by the rotation of the shaft portion 31a. Further, a sharpened sword tip 33 extending in the circumferential direction is provided on the cylindrical wall of the inner hook housing portion 32. The sword tip 33 pulls a loop of an upper thread (sewing thread) inserted through a needle hole of a sewing needle (sewing needle N in FIG. 3) in a horizontal direction while the outer hook 31 rotates once on a horizontal plane. After the catching, the catching is canceled in the specified hook over-range (the hook over-range 35 in FIG. 5). In this case, the sword tip 33 fulfills the function of forming a seam of the upper thread and the lower thread by crossing the lower thread fed from the bobbin 19 housed in the inner hook 34 into the upper thread loop and entangled with the lower thread. .

  An embroidery cloth presser device 40 is provided on the sewing machine head 12c protruding downward from the other end 12b of the sewing machine arm 12 so as to be opposed to the needle plate 20 of the sewing machine bed 11. Although the detailed structure will be described later, the embroidery cloth presser device 40 includes an embroidery cloth presser member for pressing the embroidery cloth in a state where the presser lifting operation lever 48 connected to the presser bar 47 is set at the lower position. It functions to raise 43 in conjunction with the raising operation of a needle bar (not shown).

  As shown in FIG. 3, an embroidery cloth presser 40 as an embodiment of the “embroidery presser for sewing machine” of the present invention includes a needle bar 41, an embroidery presser member 43, a holder member 46, a presser bar 47, a presser. A raising operation lever interlocking member 48a, an action member 49, a stopper 50, and the like are provided.

  The needle bar 41 holds the sewing needle N by a needle clamp 42 and is provided so as to be movable up and down on a sewing machine frame 12 d fixed to the sewing machine arm 12. The needle bar 41 is moved up and down by a needle bar drive mechanism (not shown) that operates in accordance with the rotation of the main shaft 15. The embroidery cloth presser member 43 performs a function of pressing the embroidery cloth W stretched on the embroidery frame 1. The holder member 46 is connected to a presser lifting operation lever interlocking member 48a via a presser bar 47, and holds the embroidery cloth presser member 43 connected to the support shaft 44 so as to be movable up and down via an elastic member 45. The presser lifting operation lever interlocking member 48 a operates in conjunction with the presser lifting operation lever 48. The needle bar 41, the embroidery cloth presser member 43, and the holder member 46 here correspond to the “needle bar”, “embroidery cloth presser member”, and “holder member” of the present invention, respectively.

  The presser foot lifting operation lever 48 moves the embroidery cloth presser member 43 so that the embroidery cloth presser member 43 is set to either the presser position where the embroidery cloth presser member 43 presses the embroidery cloth W or the presser release position where the presser foot of the embroidery cloth W is released. It fulfills the function of manually switching the holding position of the holder member 46 to be held. That is, when the presser lifting operation lever 48 is manually operated downward from the upper position, the holder member 46 holds the embroidery cloth presser member 43 at the lower position via the presser bar 47. In this case, the embroidery cloth pressing member 43 is lowered and can press the embroidery cloth W by the downward elastic biasing force of the elastic member 45. When an upward load exceeding the elastic urging force of the elastic member 45 is applied to the embroidery cloth presser member 43, the embroidery cloth presser member 43 is lifted by this load and can release the presser of the embroidery cloth W. it can. On the other hand, when the presser lifting operation lever 48 is manually operated upward from the lower position, the holder member 46 holds the embroidery cloth presser member 43 at the upper position via the presser bar 47. In this case, the embroidery cloth presser member 43 is raised and separated from the embroidery cloth W. This presser foot lifting operation lever 48 corresponds to the “presser foot lifting operation lever” of the present invention.

  The action member 49 is a plate-like member or a rod-like member extending above the embroidery cloth presser member 43 so as to intersect with the operation direction of the needle bar 41, and one end portion 49 a is embroidered via the support shaft 44. The presser member 43 is connected. As shown in FIG. 4, when the needle bar 41 is raised to the first ascent position P1 (position shown in FIG. 4), the action member 49 has the needle clasp 42 in the intermediate region 49b between both ends thereof. Since it abuts (engages) from below, it is engaged and held thereafter by the needle clasp 42, and is integrated with the needle bar 41 against the elastic biasing force of the elastic member 45, rather than the first raised position P1. Ascend upward. In this case, when the action member 49 is raised, the embroidery cloth presser member 43 connected to the action member 49 via the support shaft 44 is also raised. Therefore, the embroidery cloth presser member 43 is used to release the presser of the embroidery cloth W. Set to the release position. In this presser release position, the user can form a desired embroidery pattern on the embroidery cloth W by freely moving the embroidery frame 1 by hand.

  When the needle bar 41 is at the first raised position P1 in FIG. 4, as shown in FIG. 5, the outer hook 31 of the horizontal hook mechanism 30 causes the loop of the upper thread t at the tip 33 thereof. The sword tip 33 rotates in the direction of the arrow R to a position close to the hook crossing region 35 in a state of being captured while being pulled in the horizontal direction. At this time, the embroidery cloth presser member 43 is still maintained in the presser position where the embroidery cloth W is pressed, and the embroidery cloth W flutters or the upper thread after the sewing needle N comes out of the embroidery cloth W. The sewing quality is stabilized without being pulled by t. Therefore, according to the present embodiment, the time during which the embroidery cloth presser member 43 presses the embroidery cloth W can be made as long as possible until the sword tip 33 reaches the hook crossing region 35 where the capture of the upper thread t is released. . On the other hand, when the embroidery work on the thick embroidery cloth W or the operation of moving the embroidery frame 1 on which the embroidery cloth W is stretched by hand is taken into consideration, the embroidery cloth presser member 43 releases the presser of the embroidery cloth W. There is a demand for promptly raising the embroidery cloth presser member 43 to a position as high as possible.

  Therefore, in the present embodiment, the action member 49 is formed of an elastic body, and the stopper 50 that engages with the action member 49 is provided on the sewing machine frame 12d. The stopper 50 is disposed above the action member 49 so as to face the other end 49 c of the action member 49. In this case, when the action member 49 engaged and held by the needle clamp 42 rises integrally with the needle bar 41, the other end 49 c of the action member 49 comes into contact with the tip of the stopper 50.

  As shown in FIG. 6, when the needle bar 41 is moved up to the second raised position P2 (in the vicinity of the top dead center above the first raised position P1) integrally with the action member 49, the action is applied. The member 49 is biased upward by the needle clamp 42 from below in the state in which the tip of the stopper 50 is in contact with the other end 49c. At this time, the action member 49 rotates counterclockwise around the other end 49c according to the so-called “lever principle”. In this case, the other end 49c (and the tip of the stopper 50) of the action member 49 becomes a “fulcrum”, the intermediate region 49b of the action member 49 becomes a “force point”, and the one end 49a of the action member 49 It becomes "point". Therefore, in this action member 49, the small ascending motion applied to the intermediate region 49b (power point) by the needle clamp 42 can be amplified to the large ascending motion at the one end portion 49a (acting point). That is, after the action member 49 comes into contact with the stopper 50, the linear upward movement of the needle bar 41 is converted into the linear amplified upward movement of the embroidery cloth presser member 43, and the embroidery cloth presser member 43 is moved in a short time. It can be raised rapidly.

  In this case, the needle clamp 42, the action member 49, and the stopper 50 cooperate with each other, whereby the embroidery cloth presser member 43 is interlocked with the upward movement of the needle bar 41 and the elastic force of the elastic member 45 against the holder member 46. The embroidery cloth presser member 43 is driven so as to rise against the needle bar 41 with a rising stroke exceeding the needle bar 41. Therefore, the needle clamp 42, the action member 49, and the stopper 50 correspond to the “holding portion”, “action member”, and “stopper” of the present invention, respectively. The “drive mechanism” is configured.

  According to this drive mechanism, the rising degree of the embroidery cloth presser member 43 with respect to the needle bar 41 can be increased as compared with the case where the stopper 50 is not used. As a result, the embroidery cloth presser member 43 is embroidered during one cycle of the vertical movement of the needle bar 41 by increasing the lift stroke (lift amount) of the embroidery cloth presser member 43 that rises in conjunction with the upward movement of the needle bar 41. Even if the time during which the cloth W is pressed is lengthened, the embroidery cloth presser member 43 can be raised to a desired height thereafter. In this case, it is effective to stabilize the sewing quality by preventing the embroidery cloth W from flapping or being pulled by the upper thread t after the sewing needle N comes out of the embroidery cloth W. Further, since the embroidery cloth presser member 43 is automatically raised to a desired height, the user does not need to operate the presser foot lifting operation lever 48 at all in order to raise the embroidery cloth presser member 43 set at the presser position. Thereby, the complexity of the user can be eliminated. Further, the drive mechanism can be realized by a simple and inexpensive structure with a reduced number of parts.

  Further, according to the above drive mechanism, since the action member 49 is formed of an elastic body, even when a simple structure in which the one end portion 49a of the action member 49 is fixed to the support shaft 44 is employed, the action member 49 is elastically deformed. The action member 49 can be appropriately rotated. Further, the action member 49 made of an elastic body is effective in suppressing sound and vibration generated during the rotation operation.

  Further, according to the above drive mechanism, the needle clamp 42 for attaching the sewing needle N to the needle bar 41 also serves as an engaging portion that engages with the intermediate region 49b of the action member 49, so that the number of parts can be further increased. Reduction can be achieved.

  In this embodiment, the action member 49 is formed of an elastic body. However, the action member 49 may be formed of a rigid body or a low-elastic body such as a metal material or a hard resin material. In this case, the action member 49 is connected to the support shaft 44 via a hinge mechanism 60 that allows rotation about the one end 49a (the rotation shaft 61) of the action member. In particular, the hinge mechanism 60 is configured so as to rotate only in the lower region around the one end 49a from the state where the action member 49 is set to the initial position extending in the horizontal direction. Thereby, even when the action member 49 is configured by a rigid body or a low-elasticity body such as a metal material or a hard resin material, the action member 49 can be appropriately rotated through the hinge mechanism 60 disposed on the action member 49. Of course, this hinge mechanism 60 can also be adopted when the action member 49 is formed of an elastic body.

  The present invention is not limited to the above exemplary embodiment, and various applications and modifications are possible. For example, each of the following embodiments to which the above embodiment is applied can be implemented.

  In the above embodiment, the case has been described in which the needle clasp 42 for mounting the sewing needle N to the needle bar 41 also serves as an engaging portion that engages with the intermediate region 49b of the action member 49. A portion other than the clasp 42 can be employed as an engaging portion that engages with the intermediate region 49 b of the action member 49. In this case, as an engagement form between the engagement portion and the intermediate region 49b of the action member 49, various forms such as fitting, clamping, suction and the like can be adopted in addition to the contact.

  In the above-described embodiment, the case where the linear upward movement of the needle bar 41 is converted into the linear amplified upward movement of the embroidery cloth presser member 43 using the “lever principle” of the action member 49 has been described. In the present invention, if the linear ascending motion of the needle bar 41 can be converted into the linearly amplified ascending motion of the embroidery cloth presser member 43, the power conversion mechanism during that time uses the “lever principle” described above. The present invention is not limited to the embodiment. For example, as the power conversion mechanism, at least one of components such as a gear (gear), a friction wheel, a belt member, a cam member, a link member, and a crank member can be adopted.

  In the above-described embodiment, the embroidery cloth presser 40 provided in the sewing machine 10 equipped with the horizontal hook mechanism that rotates the outer hook on the horizontal plane is described. However, the vertical hook mechanism that rotates the outer hook on the vertical surface is mounted. The present invention can also be applied to a sewing machine embroidery presser device.

  Moreover, when based on description of said embodiment and various modifications, in this invention, the following each aspects (aspect) can be taken.

In the present invention, “a needle bar which is provided on the sewing machine frame so as to be movable up and down and detachably holds a sewing needle, an embroidery cloth presser member for pressing the embroidery cloth, and the embroidery cloth presser member via an elastic member. A holder member that can be moved up and down, and the embroidery presser member so that the embroidery presser member is set to one of a presser position where the embroidery presser presses the embroidery cloth and a presser release position that releases the presser of the embroidery cloth. A presser foot lifting operation lever for manually switching the holding position of the holder member that holds the holder, and the embroidery cloth presser member being set to the presser position by switching the holding position of the holder member by the presser foot lifting operation lever Thus, the embroidery cloth presser member rises with a rising stroke exceeding the needle bar against the elastic force of the elastic member with respect to the holder member in conjunction with the raising operation of the needle bar. , Including a driving mechanism for driving the embroidery cloth pressing member, the sewing machine. May take aspect (aspect 1) of ".
According to the sewing machine of this aspect 1, the embroidery cloth presser member moves the embroidery cloth during one cycle of the needle bar up-and-down movement by increasing the rising stroke of the embroidery cloth presser member that rises in conjunction with the upward movement of the needle bar. Even if the pressing time is lengthened, the embroidery presser member can be raised to a desired height thereafter.

Further, according to the present invention, the sewing machine according to aspect 1, wherein the driving mechanism extends in a long shape intersecting the operation direction of the needle bar above the embroidery cloth presser member, and one end thereof is An action member connected to the embroidery cloth presser member via a support shaft; a stopper provided on the sewing machine frame so as to face the other end of the action member above the action member; and the needle bar The operating member is rotated about the other end while the stopper is in contact with the other end of the operating member while engaging with an intermediate region between both ends of the operating member from below. The sewing machine is provided with an engaging portion that urges the intermediate region upward as described above.
According to the sewing machine of this aspect 2, a mechanism for increasing the rising stroke of the embroidery cloth presser member with respect to the needle bar in conjunction with the upward movement of the needle bar can be realized with a simple and inexpensive structure with a reduced number of parts.

Further, in the present invention, an embodiment (embodiment 3), which is “the sewing machine according to embodiment 2, wherein the action member is formed of an elastic body” can be adopted.
According to the sewing machine of this aspect 3, the action member can be appropriately rotated by elastic deformation of the action member, and it is effective for suppressing sound and vibration generated during the rotation of the action member.

Further, according to the present invention, “the sewing machine according to aspect 2 or 3, wherein the action member is coupled to the support shaft via a hinge mechanism that allows only rotation about the one end of the action member. The embodiment (embodiment 4) can be taken.
According to the sewing machine of this aspect 4, even when the action member is constituted by a rigid body or a low elastic body such as a metal material or a hard resin material, the action member can be appropriately rotated through the hinge mechanism. .

Further, in the present invention, the sewing machine according to any one of aspects 1 to 4, wherein the engagement portion is configured by a needle clamp for mounting the sewing needle on the needle bar. ”(Embodiment 5).
According to the sewing machine of aspect 5, since the needle clamp also serves as the engaging portion, the number of parts can be further reduced.

Further, in the present invention, the sewing machine according to any one of the aspects 1 to 5, wherein the outer hook that rotates on a horizontal plane that extends across the operation direction of the needle bar rotates once. A horizontal hook mechanism configured to release the catch in a region beyond the specified hook after catching the loop of the upper thread inserted through the needle hole of the sewing needle in the horizontal direction; and A mode (mode 6) in which the embroidery presser member is driven when the rotational position of the outer hook reaches the hook crossing region can be adopted.
According to the sewing machine of aspect 6, even when the horizontal shuttle mechanism is provided, the embroidery cloth may be fluttered or pulled by the upper thread by increasing the time during which the embroidery cloth presser member is pressing the embroidery cloth. Can be surely prevented.

  DESCRIPTION OF SYMBOLS 1 ... Embroidery frame, 10 ... Sewing machine, 11 ... Sewing machine bed, 11a ... One end part, 11b ... Other end part, 11c ... Upper surface, 12 ... Sewing arm, 12a ... One end part, 12b ... Other end part, 12c ... Sewing machine head , 12d ... machine frame, 13 ... pedestal, 13a ... one end, 13b ... other end, 14 ... sewing machine motor, 15 ... main shaft, 16 ... power transmission mechanism, 19 ... bobbin, 20 ... needle plate, 21 ... Needle plate lid, 23 ... hand pulley, 30 ... horizontal hook mechanism, 31 ... outer hook, 31a ... shaft, 32 ... inner hook receiving part, 33 ... sword tip, 34 ... inner hook, 35 ... over hook position, 40 ... embroidery cloth Presser device, 41 ... Needle bar, 42 ... Needle clamp, 43 ... Embroidery cloth presser member, 44 ... Support shaft, 45 ... Elastic member, 46 ... Holder member, 47 ... Presser bar, 48 ... Presser lifting operation lever, 48a ... Presser Lifting lever interlocking member, 49 ... acting member, 49a ... one Department, 49b ... intermediate region, 49c ... the other end, 50 ... stopper, 60 ... hinge mechanism, 61 ... rotational shaft, N ... Sewing needles, W ... embroidered cloth

Claims (6)

An embroidery cloth presser device for a sewing machine provided in a sewing machine,
A needle bar provided in the sewing machine frame so as to be movable up and down, and holding the sewing machine needle detachably;
An embroidery cloth presser member for pressing the embroidery cloth;
A holder member that holds the embroidery cloth presser member so as to be movable up and down via an elastic member;
The holding position of the holder member that holds the embroidery cloth presser member so that the embroidery cloth presser member is set to either a presser position that presses the embroidery cloth or a presser release position that releases the presser of the embroidery cloth. A presser foot lifter lever for switching manually,
In a state where the embroidery cloth presser member is set to the presser position by switching the holding position of the holder member by the presser lifting operation lever, the embroidery cloth presser member is interlocked with the raising operation of the needle bar and the holder member A driving mechanism that drives the embroidery cloth presser member so as to rise with a rising stroke exceeding the needle bar against the elastic force of the elastic member,
An embroidery cloth presser device for a sewing machine. An embroidery presser device for a sewing machine according to claim 1,
The drive mechanism is
An action member extending above the embroidery cloth presser member in an elongated shape intersecting the operation direction of the needle bar and having one end connected to the embroidery cloth presser member via a support shaft;
A stopper provided on the sewing machine frame so as to face the other end of the action member above the action member;
When the needle bar is lifted, it engages with an intermediate region between both ends of the action member from below, and the actuating member moves the other end with the stopper in contact with the other end of the action member. An engaging portion that biases the intermediate region upward to rotate about the center;
An embroidery cloth presser device for a sewing machine comprising: An embroidery cloth presser device for a sewing machine according to claim 2,
An embroidery cloth presser device for a sewing machine, wherein the action member is formed of an elastic body. An embroidery cloth presser device for a sewing machine according to claim 2 or 3,
The sewing machine embroidery presser device, wherein the working member is connected to the support shaft via a hinge mechanism that allows rotation about the one end of the working member. An embroidery cloth presser device for a sewing machine according to any one of claims 1 to 4,
The embroidery presser device for a sewing machine, wherein the engaging portion is configured by a needle clamp for attaching the sewing needle to the needle bar. An embroidery cloth presser device for a sewing machine according to any one of claims 1 to 5,
The sewing machine pulls the upper thread loop inserted through the needle hole of the sewing needle in the horizontal direction while the outer shuttle that rotates on the horizontal plane extending across the operation direction of the needle bar makes one rotation. A horizontal hook mechanism configured to release the catch in the specified hook over region after being caught,
The drive mechanism is an embroidery presser device for a sewing machine that drives the embroidery presser member when the rotational position of the outer hook reaches the hook crossing region.

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