JP2016032673A - Embroidery frame device for sewing machine - Google Patents

Abstract

PURPOSE: To provide an embroidery frame device for a sewing machine in which an embroidery frame can be surely mounted on an embroidery frame drive device of a sewing machine with an embroidery function without causing backlash, and which can simplify the structure.CONSTITUTION: An embroidery frame device includes: an embroidery frame drive part in which a carriage 5 is provided; an embroidery frame A having a mounting part A1 mounted on the carriage 5 of the embroidery frame drive part; a frame fixing pin 42 which is locked to a hole 51 to be locked formed at the carriage 5 and which connects and fixes the mounting part A1 and the carriage 5; and a stabilization part 43 comprising a stabilizer 43a having a through-hole in a middle place so that the fixing pin 42 can move in an axial direction, a stabilizing shaft 43b fixed to a lower surface side of the stabilizer 43a, and an elastic member 43c mounted on the stabilizing shaft 43b so as to elastically energize downward. The frame fixing pin 42 normally protrudes from the mounting part A1 by an elastic energization force, and it becomes possible to be stored inside the mounting part A1 against the elastic energization force.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an embroidery frame device for a sewing machine that can securely attach an embroidery frame to an embroidery frame driving device of a sewing machine with an embroidery function so as not to cause backlash and can simplify the configuration.

  In general, an embroidery frame to be attached to a sewing machine with an embroidery sewing function includes an outer frame for tensioning a cloth and a frame portion having an inner frame, and an attachment portion formed integrally with the outer frame and attached to a carriage of the embroidery sewing machine. It consists of. Japanese Patent Application Laid-Open Publication No. 2003-228561 has already proposed a technique for attaching the embroidery frame to the carriage of the embroidery frame driving means by a simple operation.

  The contents of Patent Document 1 will be briefly described. The mounting portion of the embroidery frame has a pair of guide pins for engaging with a hole portion provided in the carriage and a groove portion of the carriage. Frame fixing means for fixing the embroidery outer frame to the carriage by the pressing force is provided. The guide pin is attached to the attachment portion so as to be movable up and down. The attachment portion is provided with a slot, and guides the spring that is loosely fitted to the guide pin.

  The guide pin is biased downward by a spring and protrudes from the lower surface of the mounting portion. And if it presses against the elastic force of a spring, it can retract in an attachment part. A guide pin protrudes from the lower surface of the attachment portion to the attachment portion of the embroidery frame by the bias of the spring. In this state, the pair of guide pins are engaged and positioned in holes provided in the carriage, and the frame fixing pins are guided into the groove portions of the carriage. Then, the embroidery frame is connected and fixed to the carriage by the frame fixing means.

  In addition, to attach the cloth to the embroidery frame, place the embroidery frame on a work table separate from the sewing machine in a state where it is removed from the embroidery frame driving means of the sewing machine, but only press the embroidery frame on the work table. The guide pin compresses the spring and moves upward, retracts into the lower surface of the mounting portion, and there is nothing protruding on the lower surface side, so that the embroidery frame can be installed in a stable state. Can be stretched over the embroidery frame.

JP 2002-52278 A

  Patent Document 1 has the advantages as described above, however, there is a point that cannot be solved as described below. First, the guide pin is freely retractable so that it always protrudes outward from the mounting portion by elastic biasing. Therefore, the guide pin may actually have some backlash from the beginning. Therefore, even if the guide pin is inserted into the corresponding hole of the carriage and fixed by the frame fixing means, rattling may remain on the embroidery frame, and rattling increases due to mechanical vibration of the sewing machine during work. There is also enough fear.

  The size of the guide pin and the hole into which the guide pin is inserted is such that the hole is larger in diameter than the guide pin so that the guide pin can be inserted. Here, if the guide pin is configured to be more easily inserted, the diameter of the hole portion must inevitably have a margin, and the guide pin becomes large, but on the other hand, a large backlash occurs. It will be.

  Further, if the guide pin is not rattled, it is necessary to make the diameter of the hole substantially the same as that of the guide pin. However, in this case, the working accuracy is increased and the manufacturing cost is increased. . There is also a problem that it is difficult to insert the guide pin into the hole. An object (technical problem to be solved) of the present invention is to allow the embroidery frame driving device to be securely mounted so that the embroidery frame is not loose, and to simplify the configuration.

  In view of the above, the inventor has intensively and researched to solve the above problems, and as a result, the invention of claim 1 includes an embroidery frame driving portion provided with a carriage and an attachment portion for attaching the embroidery frame driving portion to the carriage. An embroidery frame having a frame, a frame fixing pin that is locked to a locking hole formed in the carriage, and connects and fixes the mounting portion and the carriage, and the fixing pin is movable in the axial direction. A stabilizing portion comprising a stabilizing plate having a through hole at an intermediate location, a stabilizing shaft fixed to the lower surface side of the stabilizing plate, and an elastic member attached to the stabilizing shaft so as to be elastically biased downward, The frame fixing pin is a sewing machine embroidery frame device that normally protrudes from the mounting portion due to the elastic biasing force and can be stored inside the mounting portion against the elastic biasing force. Above section It was resolved.

  According to the first aspect of the present invention, there is no backlash by the frame fixing means for connecting and fixing the mounting portion of the embroidery frame and the carriage of the embroidery frame driving means.

(A) is a plan view of the embroidery frame and the embroidery frame driving means in the present invention, (B) is a perspective view showing the mounting portion of the embroidery frame and the carriage of the embroidery frame driving means, (C) is (A) of (B) (D) is a perspective view of the main part in a state where the attachment part of the embroidery frame is attached to the carriage of the embroidery frame driving means. (A) is a sectional view along the longitudinal direction of the mounting portion, (B) is an enlarged view of (A) portion of (A), (C) is a sectional view taken along arrow Y1-Y1 of (A), (D) is ( (C) Enlarged view of (c), (E) is a view taken along arrow X1-X1 of (A). (A) is a side view with a partial cross section along the longitudinal direction of the carriage, (B) is an enlarged view of (A) part of (A), (C) is a cross-sectional view taken along arrow Y2-Y2 of (A), (D) is an enlarged view of part (e) of (C), and (E) is an X2-X2 arrow view of (A). (A) is a cross-sectional view orthogonal to the longitudinal direction in a state where the mounting portion of the embroidery frame is attached to the carriage of the embroidery frame driving means, and (B) is a convex portion to be inserted into the concave portion in the X direction of the embroidery frame driving means. (C) is an enlarged cross-sectional view of a state in which a convex portion is inserted into a concave portion, and (D) is a longitudinal direction of a state in which the attachment portion of the embroidery frame is attached to the carriage of the embroidery frame driving means FIG. (A) is a perspective view of a first embodiment of a concave portion and a convex portion, (B) is a perspective view of a third embodiment of a concave portion and a convex portion, and (C) is a concave portion and a convex portion. It is a perspective view of 4th Embodiment. (A) is sectional drawing of the state which the fixing pin of the frame fixing means completed drawing in the state which mounted the embroidery frame on the flat work table.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the present invention mainly comprises an embroidery frame A and an embroidery frame driving means B provided in the sewing machine body. The embroidery frame A in the present invention mainly includes a frame portion 1 and an attachment portion A1. Frame 1
Is composed of an outer frame 11 and an inner frame 12. The outer frame 11 is integrally formed with the mounting portion A1 via the arm-shaped portion 11a [see FIGS. 1A, 1B, and 1D]. The attachment portion A1 includes an attachment base portion 2, guide means 3, and frame fixing means 4. The mounting base part 2 is a part surrounded by a substantially elliptical rising part 21 when viewed from the plane, and the upper part is opened, and members constituting the frame fixing means 4 described later are arranged inside.

Next, the guide means 3 includes a concave portion 31 and a convex portion 32. The concave portion 31 is a concave portion having a tapered inner side surface 31a that gradually narrows toward the bottom portion 31f (see FIG. 1C and FIG. 2). The convex portion 32 is a protruding portion having a tapered outer surface 32a that gradually narrows toward the top portion 32t [see FIG. 1 (C), FIG. 3]. The concave portion 31 is formed on the lower surface side of the mounting base portion 2 of the mounting portion A1, and the convex portion 32 is formed on the upper surface side of the carriage 5 (see FIG. 1B). And the said recessed part 31 and the convex-shaped part 32 may be formed reversely. That is, the convex portion 32 may be formed on the lower surface side of the mounting base portion 2 of the mounting portion A1, and the concave portion 31 may be formed on the upper surface side of the carriage 5.

In the concave portion 31, the tapered inner side surface 31 a is configured such that at least two opposing inner side surfaces have a taper angle θ. In the convex portion 32, the tapered outer surface 32a is configured such that at least two opposed outer surfaces have a taper angle θ. Here, the taper angles of the taper inner surface 31a and the taper outer surface 32a are the same. The concave portion 31 and the convex portion 32 make a pair, and the pair of concave portion 31 and convex portion 32 are provided on both sides of the frame fixing means 4 at a predetermined interval.

Then, by inserting the convex portion 32 into each pair of concave portions 31, the mounting portion A1 of the embroidery frame A is accurately aligned with the carriage 5 of the embroidery frame driving means B, and As the convex portion 32 bites into the concave portion 31, the embroidery frame A can be prevented from rattling.

The guide means 3 has a plurality of embodiments. In the first embodiment, the concave portion 31 and the convex portion 32 have a circular planar shape (see FIG. 5A). . Here, the planar shape is a state viewed from the lower surface side in the attachment portion A1, and is a state viewed from the upper surface side in the carriage 5. The concave portion 31 in the first embodiment is formed as a reverse truncated cone-shaped gap, and the convex portion 32 is formed as a truncated cone-shaped protrusion.

And in the recessed part 31, the taper inner surface 31a forms the inner peripheral side surface of the recessed part 31 over a perimeter. Moreover, in the convex part 32, the taper outer surface 32a forms the outer peripheral side surface of the convex part 32 over the whole periphery. In addition, the first embodiment includes one in which the concave portion 31 is formed as a substantially hemispherical depression and the convex portion 32 is formed as a substantially hemispherical protrusion having the same diameter as the concave portion 31. In this case, the tapered inner surface 31a and the tapered outer surface 32a are substantially similar to a tapered shape.

  Next, in the second embodiment of the guide means 3, the concave portion 31 and the convex portion 32 are formed so that the planar shape is an elliptical shape [FIGS. 1 (B), (C), FIG. See FIG. 3 etc.]. The elliptical shape includes a substantially elliptical shape, and in addition to a normal elliptical shape, a rectangular shape (rectangular or square) in which both sides facing each other have a substantially capsule shape in which left and right symmetrical semicircles are included. Particularly, in the illustrated embodiment, the concave portion 31 and the convex portion 32 are configured such that two opposed flat surfaces and two opposed semicircular circumferential side surfaces are both at a taper angle θ. ing.

  In the second embodiment, the concave portion 31 and the convex portion 32 are both formed such that the longitudinal direction of the ellipse coincides with the Y direction of the embroidery frame driving means. And the taper inner side surface 31a of the concave part 31 and the taper outer side surface 32a of the convex part 32 are contact | abutted in contact | adherence at least by the X direction. Further, the concave portion 31 and the convex portion 32 may be formed slightly shorter than the convex portion 32 in the longitudinal direction, that is, the Y direction. In other words, the concave portion 31 and the convex portion 32 only need to be in close contact with each other in at least one of the X direction and the Y direction in the embroidery frame driving means.

Next, in 3rd Embodiment of the guide means 3, the recessed part 31 and the convex part 32 make the planar shape square shape [refer FIG.5 (B)]. The concave portion 31 has four tapered inner side surfaces 31a.
Is a void-like portion of a truncated quadrangular pyramid formed by Further, the convex portion 32 is a projecting portion having a truncated quadrangular pyramid shape formed by four tapered outer surfaces 32a. In the third embodiment, only two opposing surfaces are formed as tapered outer surfaces 32a and 32a, and the other two opposing surfaces may be vertical surfaces.

In the third embodiment, in the concave portion 31, only a pair of opposing two surfaces are formed as tapered inner surfaces 31a, 31a, and in the convex portion 32, only a pair of opposing two surfaces are tapered outer surfaces 32a. , 32a, and the other two opposing surfaces of the concave portion 31 and the convex portion 32 may be vertical surfaces. In other words, the two surfaces facing each other only in either the X direction or the Y direction are the tapered inner surfaces 31a, 31a, and the two surfaces corresponding to the both tapered inner surfaces 31a, 31a are the tapered outer surfaces 32a, 32a. I just need it.

Next, in 4th Embodiment of the guide means 3, the recessed part 31 and the convex part 32 make the planar shape rectangular shape [refer FIG.5 (C)]. The concave portion 31 has four tapered inner side surfaces 31a.
It is a rectangular-shaped truncated quadrangular pyramid-shaped space-like region formed by In addition, the convex portion 32 is a projecting portion of a rectangular truncated quadrangular pyramid formed by four tapered outer surfaces 32a.

Also in the fourth embodiment, as in the above-described third embodiment, in the concave portion 31, only one pair of opposing two surfaces are formed as tapered inner side surfaces 31a and 31a, and in the convex portion 32, the opposing 1 Only the two surfaces of the pair may be formed as tapered outer surfaces 32a and 32a, and the other two opposing surfaces of the concave portion 31 and the convex portion 32 may be vertical surfaces.

As described above, in the guide means 3 in the first to fourth embodiments, the concave portion 31 is formed on the mounting portion A1 side of the embroidery frame A, and the convex portion 32 is formed on the carriage 5, and the convex portion 32 is formed on the mounting portion A1 side. There is an embodiment in which a concave portion 31 is formed on the carriage 5. In the embodiment in which the concave portion 31 is formed in the attachment portion A1, there is no projecting portion on the lower surface side of the attachment portion A1. Therefore, when the embroidery frame A is placed on a flat work table in order to attach the cloth to the embroidery frame A removed from the sewing machine body, the embroidery frame A is not inclined and is in a horizontal state. It is possible to easily perform the work of tensioning the cloth.

In the embodiment in which the convex portion 32 is formed on the attachment portion A1, the embroidery frame A is generally formed of a synthetic resin, and therefore the convex portion 32 is formed on the lower surface side of the attachment portion A1. It can be easily formed integrally. Further, the concave portion 31 is not formed on the attachment portion A1 side, and the number of depressions is reduced on the lower surface side of the attachment portion A1, so that it is possible to make it difficult to collect dust.

  The frame fixing means 4 mainly includes a knob 41, a frame fixing pin 42, and a stabilizing portion 43. A frame fixing pin 42 is fixed to the knob 41, and a locking shaft piece 42a is mounted at a position near the lower end of the frame fixing pin 42. The locking shaft piece 42a has a diameter smaller than that of the frame fixing pin 42, and is penetrated and fixed so as to be orthogonal to the frame fixing pin 42. A stabilizing portion 43 is attached to the frame fixing pin 42.

The stabilizing portion 43 includes a stabilizing plate 43a, a stabilizing shaft 43b, and an elastic member 43c. A through hole is formed in the longitudinal middle portion of the stabilizing plate 43a, and the frame fixing pin 42 is configured to be movable in the axial direction. The frame fixing pin 42 is provided with a retaining ring 42b for restricting movement in the axial direction with respect to the stabilizing plate 43a (see FIG. 2A).

Further, the stable shafts 43b and 43b are fixed to the lower surface side of the stabilizing plate 43a and at positions on both sides of the frame fixing pin 42 with an appropriate interval. A main through hole 22a through which the frame fixing pin 42 passes is formed at an intermediate position in the longitudinal direction of the bottom surface portion 22 of the mounting base portion 2, and both the stable shafts 43b and 43b pass through on both sides of the main through hole 22a. Sub-through holes 22b, 22b are formed (see FIG. 2A).

Further, a main recess 2c is formed on the lower surface 2a of the mounting base 2 at a position corresponding to the main through hole 22a, and sub recesses 2d and 2d are formed at positions corresponding to the sub through holes 22b and 22b. Is formed. The frame fixing pin 42 of the frame fixing means 4 passes through the main through hole 22a of the mounting base portion 2 and protrudes downward from the main hollow portion 2c. Both stable shafts 43b and 43b pass through the sub through holes 22b and 22b. And it protrudes below from both sub hollow parts 2d and 2d.

Coil springs 43c are mounted on the two stable shafts 43b, 43b in the sub-indented portions 2d, 2d, and the elastic force of the coil springs 43c always elastically urges the stable portions 43 downward and the frame fixing pins 42 also move downward. Is elastically biased. Further, the frame fixing pin 42 can be pushed upward against the elastic biasing force of the coil spring 43c, and the lower end portion of the frame fixing pin 42 can be accommodated in the main recess 2c. In this state, the frame fixing pin 42 does not protrude from the lower surface portion 2a at all. Further, a locked hole 51 for locking the frame fixing pin 42 of the frame fixing means 4 is formed on the carriage 5 side [see FIG. 3 (E)].

  The embroidery frame driving means B is provided in the bed 7 of the sewing machine body. A carriage 5 and an XY drive mechanism 6 for reciprocating the carriage 5 in the XY direction are mounted. The bed 7 has a built-in needle thread catching means that operates in synchronization with the vertical movement of the needle bar, and has a work surface for normal sewing and embroidery sewing. A board is installed. The carriage 5 is moved in the X direction and the Y direction by the XY drive mechanism 6 (see FIG. 1A).

The attachment portion A1 of the embroidery frame A is attached to the carriage 5 of the embroidery frame driving means B by the guide means 3 and the frame fixing means 4. Here, the mounting portion A1 will be described based on an embodiment in which the concave portion 31 of the guide means 3 is formed and the carriage 5 is formed with the convex portion 32. In order to install the attachment portion A1 on the carriage 5, first, the concave portion 31 of the attachment portion A1 and the convex portion 32 of the carriage 5 are aligned, and the convex portion 32 is inserted into the concave portion 31. Deploy.

When the convex portion 32 is inserted into the concave portion 31, the tapered inner side surface 31a and the tapered outer side surface 3
The center line La of the concave portion 31 and the center line Lb of the convex portion 32 can substantially coincide with each other in the process in which the two a come into contact with each other and the convex portion 32 is inserted deeply into the concave portion 31. [Fig. 4 (B),
(See (C)). When the convex portion 32 bites into the concave portion 31, the taper outer surface 32a bites into a wedge state with respect to the taper inner side surface 31a, and the attachment portion A1 is fixed to the carriage 5 by the frame fixing means 4. The portion A1 can be free of rattling with respect to the carriage 5.

In addition, in order to tension the cloth on the embroidery frame A, the embroidery frame A is arranged on a work table different from the sewing machine in a state where it is removed from the embroidery frame driving means B of the sewing machine. The frame fixing pin 42 compresses the spring and moves upward by simply pressing it onto the work table 8, retracts into the lower surface 2 a of the mounting portion A 1, and has no protrusion on the lower surface 2 a side. The embroidery frame A can be installed in a stable state, and the cloth can be stretched on the embroidery frame (see FIG. 6).

  In the present invention, if the guide means is configured to have a predetermined interval on both sides of the frame fixing means, the convex portion is formed on either the mounting portion or the carriage. At the same time, a concave portion is formed on the other side. Accordingly, when the convex portion 32 is inserted into the concave portion 31 when the carriage 5 and the attachment portion A1 are connected, in the process, the tapered outer surface 32a and the tapered inner side surface 31a come into contact with each other, and the convex portion 32 is It can bite into the concave portion 31 in a wedge state, and a connection without backlash can be made between the convex portion 32 and the concave portion 31. Further, since the top of the convex portion 32 is narrow and the opening of the concave portion 31 is widened, there is an advantage that the convex portion 32 can be easily inserted into the concave portion 31.

  Further, in the present invention, the concave portion 31 and the convex portion 32 are provided on both sides of the guide means 3 and the frame fixing means if the plane is configured to be circular. Can be connected and fixed to the carriage 5 in a more stable state. Furthermore, such a convex part 32 is formed as a truncated cone, and is formed as a recess having a gap part of the truncated cone of the concave part 31, so that the shape can be simplified.

  In the present invention, if the concave portion 31 and the convex portion 32 are configured to have an elliptical plane, the convex portion 32 and the concave portion 31 have an elliptical planar shape. Thus, the contact area in the inserted state between the pair of convex portions 32 and the concave portions 31 is increased, and the attachment portion A1 and the carriage 5 can be connected more stably and firmly. Further, in the present invention, if the concave portion 31 and the convex portion 32 are configured to have a square plane, the convex portion 32 and the concave portion 31 have a square planar shape, The surfaces where the convex portions 32 are inserted into the concave portion 31 and come into contact with each other are flat surfaces, which can make contact more closely.

  Moreover, in this invention, if the said recessed part 31 and the said convex-shaped part 32 are set as the structure which makes a plane rectangular, the convex-shaped part 32 and the concave-shaped part 31 are because the planar shape was made into the rectangular shape. The abutting surfaces are flat surfaces, and the contact area is further increased, so that the abutment can be made even stronger. In the present invention, if the concave portion 31 is formed on the mounting portion A1 and the convex portion 32 is formed on the carriage 5, the convex portion 32 is formed on the carriage 5, and the concave portion is formed. Since 31 is formed in the attachment portion A1, there is no projecting portion on the lower surface side of the attachment portion A1, and when the embroidery frame A is placed on a flat work table, the embroidery frame A may be inclined. In addition, the work of attaching the cloth can be easily performed.

  Further, in the present invention, if the concave portion 31 is formed on the carriage 5 and the convex portion 32 is formed on the attachment portion A1, the convex portion 32 is formed on the attachment portion A1. In general, the embroidery frame A is often formed of a synthetic resin. Therefore, the convex portion 32 can be easily formed integrally with the attachment portion A1. Further, the concave portion 31 is not formed on the attachment portion A1 side, and the number of depressions is reduced on the lower surface side of the attachment portion A1, so that it is possible to make it difficult to collect dust.

A ... Embroidery frame, 1 ... Lower frame part, 12 ... Inner frame, 11 ... Outer frame, A1 ... Mounting part,
DESCRIPTION OF SYMBOLS 3 ... Guide means, 31 ... Concave part, 31a ... Tapered inner surface, 31f ... Bottom part, 32t ... Top part, 32 ... Convex part, 32a ... Tapered outer surface, 4 ... Frame fixing means, B ... Embroidery frame drive means,
5 ... Carriage.

Claims (1)

An embroidery frame driving portion provided with a carriage, an embroidery frame having an attachment portion attached to the carriage of the embroidery frame driving portion, and an attachment portion and the carriage that are engaged with a to-be-engaged hole formed in the carriage. Are fixed to the lower surface side of the stabilizing plate 43a, a frame fixing pin 42 for connecting and fixing, a stabilizing plate 43a having a through hole at an intermediate position so that the fixing pin 42 is movable in the axial direction. A stable portion comprising a stable shaft 43b and an elastic member attached to the stable shaft 43b so as to be elastically biased downward; and the frame fixing pin always protrudes from the mounting portion by the elastic biasing force. In addition, the sewing machine embroidery frame device can be stored inside the mounting portion against the elastic biasing force.

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