JP2003340185A - Embroidering sewing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an embroidering sewing machine for smoothly embroidering without damaging an annular embroidering object member. <P>SOLUTION: This embroidering sewing machine M longitudinally and laterally moves a holding frame 3 for holding the embroidering object member H by a moving device to a free arm 1 having a shuttle hook part for housing a bobbin case 10. A cross-sectional round long size member 6 having an opening upper part is rockingly installed in a fixing part 9 of a sewing machine body. A rocking range is set up to a second position for taking in and out at least the bobbin case 10 by downwardly moving a free end part from a first position for covering at least a lower side surface of the free arm 1. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewing machine for embroidery.

[0002]

2. Description of the Related Art Generally, a sewing machine for embroidery has a free arm having a hook portion for accommodating a bobbin case at a tip thereof, a head for supporting a needle and inserting / removing the needle with respect to the hook portion. A holding frame arranged between the free arm and the head is provided, and the holding frame in which the embroidered member is stretched is moved in the front-rear direction and the left-right direction according to the embroidery information input to the computer in advance. The upper thread inserted through the needle hole and the lower thread on the bobbin on the embroidered cloth portion are used for embroidery.

Here, when embroidering on a ring-shaped embroidered member such as a supporter using the embroidery sewing machine, conventionally,
The embroidery cloth portion is firmly held in the holding frame so that the embroidered cloth portion is not displaced, and the embroidery cloth portion is hung over the free arm (the holding frame and the free arm stretch the embroidered member in a triangular shape).

However, the lower side surface of the free arm that comes into contact with the ring-shaped member to be embroidered has corners and also has catches such as irregularities and screw heads. Therefore, as the holding frame moves to the left and right and back and forth, There has been a problem that a portion of the ring-shaped embroidered member that comes into contact with a corner of the free arm or a catching portion is torn or scratched.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an embroidery sewing machine that can be smoothly embroidered without damaging an annular member to be embroidered.

[0006]

According to the present invention, a holding frame for holding an embroidered member H is moved forward and backward by a moving device with respect to a free arm having a hook part for accommodating a bobbin case. An embroidery sewing machine that can be moved, moved to the left and right, or rotated in the forward and reverse directions. A long member having an open top and a rounded cross section is swingably attached to a fixed portion of the sewing machine main body, and the swing range of the free arm is set. It is set from a first position that covers at least the lower surface to a second position where the free end moves downward and at least the bobbin case can be taken in and out. (Invention of Claim 2) In the present invention, the holding frame for holding the embroidered member H is moved forward and backward and leftward and rightward or forward or backward by the moving device with respect to the free arm having the hook portion that houses the bobbin case. A sewing machine for embroidery, wherein a long member having an open top and a rounded cross section is vertically movably attached to a fixed portion of the sewing machine main body, and the vertical movement range is from a first position that covers at least the lower side surface of the free arm. It is set to a second position where it can be moved downward and at least the bobbin case can be taken in and out. (Invention of Claim 3) In the present invention, the holding frame for holding the embroidered member H is moved forward and backward and leftward and rightward or forward or reverse by the moving device with respect to the free arm having the hook portion that houses the bobbin case. In a sewing machine for embroidery, an elongate member having an open upper section which covers at least a lower side surface of a free arm is detachably attached to a fixed portion of a sewing machine main body. (Invention of Claim 4) The present invention relates to the invention of Claim 1 or 2, wherein the elongated member is biased by a spring in a direction toward the first position. (Invention of Claim 5) The present invention relates to the invention of any one of Claims 1 to 4, wherein the holding frame is of a type in which the inner frame is fitted in the outer frame, and the front side of the outer frame An arcuate portion is formed on the side portion. (Invention of Claim 6) The present invention relates to the invention of any one of Claims 1 to 5, wherein the long member has a small friction coefficient on the outer peripheral surface. (Invention of Claim 7) The present invention relates to the invention of any one of claims 1 to 6, wherein the long member has a small friction coefficient on the outer peripheral surface.

The function of the sewing machine for embroidery of the above invention is as follows.
A description will be given in the section of the following embodiments of the invention.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embroidery sewing machine according to embodiments of the present invention will be described below with reference to the drawings. [Embodiment 1] FIG. 1 is a perspective view of an embroidery sewing machine M according to an embodiment of the present invention, a side view of the embroidery sewing machine M, and FIG. 4 shows an embroidered member H between a holding frame 3 and a long member 6. It is a front view showing a tensioned state. (Regarding the Configuration of the Embroidery Sewing Machine M ) As shown in FIGS. 1 and 2, the embroidery sewing machine M includes a free arm 1 having a hook portion in which a bobbin case 10 is housed at a tip portion (front portion), and a needle. A head 2 for inserting and removing the 20 with respect to the hook part,
A conventional sewing machine, which is provided between the free arm 1 and the head 2 and has a holding frame 3 which can be moved back and forth and left and right by a moving device 4, is newly added to an upper portion which covers the lower surface and both side surfaces of the free arm 1. An elongated member 6 having an open rounded cross section is added.

The free arm 1 is a linear rod having a flat upper surface for receiving the embroidered member H, and as shown in FIGS. 1 and 2, the bobbin case 10 is housed in the rotary hook provided at the tip. In addition, the bobbin case 10 can be easily put in and taken out from the hook by opening and closing an opening and closing lid (not shown). As described in the section of the prior art, the lower side surface of the tip of the free arm 1 has a corner and a screw head or the like is projected.

The head 2 has a needle thread adjusting device (not shown) and other well-known needle thread-related mechanisms, and the needle thread inserted into the needle 20 through the needle thread adjusting device or the like is not attached to the needle 20. It is designed to be guided into the rotary hook as well as inserted into and removed from the rotary hook. The mechanism for synchronizing the vertical movement of the needle 20 and the forward / reverse rotation of the bobbin case 10 and the mechanism for embroidering with the upper thread and the lower thread are known and will not be described.

As shown in FIGS. 1 and 4, the holding frame 3 is composed of an outer frame 30 and an inner frame 31 fitted into the outer frame 30, and an arcuate portion 32 is provided in the front part of the outer frame 30. It is provided.
Here, the inner peripheral shape of the outer frame 30 is set slightly larger than the outer peripheral shape of the inner side 31, and when the inner frame 31 is pushed into the outer frame 30 with the embroidered member H placed on the outer frame 30. The embroidered member H is held in a "tensioned" state.

Although not described in detail, in this embodiment,
A mechanism (composed of a link mechanism and an air cylinder; this mechanism is indicated by reference numeral 5) in which the upper inner frame 31 is moved up and down with respect to the lower outer frame 30 is adopted, and by operating the foot switch. The air cylinder is pneumatically driven to operate the link mechanism, and the inner frame 31 is fitted into and removed from the outer frame 30 (see FIGS. 1 and 3).

As shown in FIG. 1, the moving device 4 includes a moving bar 40 that moves in the front-rear direction with respect to the fixed portion 9 of the sewing machine body.
And a moving part 41 that moves left and right with respect to the moving bar 40.
The holding frame 3 is attached to the moving portion 41. The moving bar 40 and the moving part 41 are configured such that a timing belt and a core wire are stretched between a pair of pulleys and one of the pulleys is driven to rotate by a motor. A part of 41 is fixed to a timing belt or the like. Further, the actual back-and-forth movement of the movable crosspiece 40 and the right-and-left movement of the moving portion 41 are performed by causing the motor to rotate in the forward and reverse directions based on the embroidery information previously input to the computer.

The elongated member 6 is, as shown in FIGS.
The cross-section is shaped like a rain gutter with an R-shaped cross section, and the tip side of the gutter is closed with no raised corners, and the outer surface has a small friction coefficient. Here, in this embodiment, the long member 6 is swingably attached to the fixed portion 9 of the sewing machine main body by a hinge 60 such as a butterfly plate, as shown in FIG. From the first position, which covers the lower surface and both side surfaces of No. 1, to the second position where the free end portion moves downward and at least the bobbin case 10 can be taken in and out. As shown in FIG. 1 and FIG. 2, the free end of the elongated member 6 is biased by a spring 61 (a kick spring, a leaf spring or the like can be used) in a direction toward the first position. Therefore, although it is normally located at the first position, it can be easily moved to the second position by exerting a pushing-down force on the free end. (Regarding Usage Modes of the Embroidery Sewing Machine M) An example of usage modes of the embroidery sewing machine M when embroidering on the ring-shaped embroidered member H will be described below. ． As shown in FIG. 3, the foot switch is operated to move the inner frame 31 upward, and the annular embroidered member H is stretched between the outer frame 30 and the elongated member 6. Since the arcuate portion is provided on the front side of the outer frame 30, the embroidered member H can be stretched smoothly without damaging it. ． By operating the foot switch, as shown in FIG. 3, the inner frame 31 is moved downward, the inner frame 31 is fitted into the outer frame 30, and the embroidered member H is clamped. In this state,
As shown in FIG. 4, the embroidered member H is held by the outer frame 30 and the inner frame 31 in a "tensioned" state. Therefore, the embroidered member H is held against the holding frame 3 during the embroidery work. There is no displacement. ． When the work start switch is turned on, the moving bar 40 moves back and forth and the moving section 41 moves left and right based on the embroidery information previously input to the computer, and the positional relationship between the needle 20 and the holding frame 3 in plan view changes, Holding frame 3 for the embroidered member H
A predetermined embroidery is made in the frame.

During the above embroidery work, as shown in FIGS. 4 to 6, the holding frame 3 moves swiftly in the front-rear and left-right directions as the movable rail 40 and the movable portion 41 move, and the member H to be embroidered.
The contact position with the long member 6 at changes drastically. However, as shown in FIGS. 1 and 4, the elongated member 6 has a shape like a rain gutter with a cross section of R and has a closed lid at the tip end side thereof without sharp edges. Since the outer surface has a small friction coefficient, the annular embroidered member H is not broken or scratched when the holding frame 3 is moved back and forth and left and right.

When the bobbin thread is cut or runs out, the free end of the elongated member 6 is pushed down and moved from the first position to the second position, as in the conventional case.
You can remove 0 and repair or replace the bobbin. [Other Embodiments]. Instead of the holding frame 3 of the first embodiment, the holding frame 3 shown in FIGS. 7 and 8 can be used. This holding frame 3
As shown in FIGS. 7 and 8, the front and rear plate members 30a, 30b, 31a, 31b forming the outer frame 30 and the inner frame 31 are formed.
Is an R shape, and the front and rear plate members 30a, 30
b, 31a and 31b are formed according to an arc locus about the rotation shaft 39. The holding frame 3 is configured to rotate in the forward and reverse directions about the rotating shaft 39 and to be moved back and forth. Therefore, when the embroidered member H is an annular one (three-dimensional shape) such as a supporter. The embroidery finishes neatly without the thread pulling. ． Instead of the first embodiment, the elongated member 6 having a rounded cross section may be detachably (easily) attached to the fixed portion 9 of the sewing machine main body. For example, a hole having the same sectional shape as the elongated member 6 is formed in the fixed portion 9, and the elongated member 6 is formed in this hole.
It is possible to adopt a mode of inserting and removing. ． In place of the first embodiment described above, a long member 6 having an open top and a rounded cross section is attached to a fixed portion 9 of the sewing machine body so as to be vertically movable, and the vertical movement range covers at least the lower side surface of the free arm 1. The position may be set to a second position where the bobbin case 10 can be moved in and out from the position and at least the bobbin case 10 can be taken in and out. For example, as shown in FIG. 10, the elongated member 6 is provided in the groove portion 90 of the fixed portion 9.
When the elongated member 6 is in the first position, the spherical portion 91 biased by the spring on the fixed portion 9 side is the protruding portion of the elongated member 6 when the elongated portion 6 is in the first position. It is possible to adopt a mode in which the long member 6 does not inadvertently lower by being fitted into the recess 63 of 62 (maintaining the first position). It should be noted that if a pressing force is applied to the elongated member 6, the engagement between the constituent wall of the recess 63 and the spherical body 91 is released, and the elongated member 6 can be lowered to the second position. ． Instead of the first embodiment, the elongated member 6 can cover only the lower surface of the free arm 1. ． In place of the first embodiment, the elongated member 6 may basically have a U-shaped or V-shaped cross-section as long as it has an R-shaped corner. In short, any surface may be used as long as the embroidered member H is not caught.

[0017]

From the contents described in the section of the embodiment of the present invention, it is possible to provide an embroidery sewing machine capable of smoothly embroidering without damaging an annular embroidered member.

[Brief description of drawings]

FIG. 1 is a perspective view of an embroidery sewing machine according to an embodiment of the present invention.

FIG. 2 is a side view of the embroidery sewing machine.

FIG. 3 is a perspective view showing a state in which the inner frame of the holding frame is separated from the outer frame from the state of FIG.

FIG. 4 is a partial cross-sectional view showing a relationship among the holding frame, the free arm, the long member, and the embroidered member.

5 is a partial cross-sectional view showing a state where the holding frame has moved to the right from the state of FIG.

FIG. 6 is a partial cross-sectional view showing a state where the holding frame has moved to the left from the state of FIG.

FIG. 7 is a perspective view of a holding frame according to another embodiment.

8 is a perspective view showing a state where the inner frame of the holding frame shown in FIG. 7 has moved upward from the outer frame.

9 is a front view showing the movement of the holding frame shown in FIG. 7. FIG.

FIG. 10 is a cross-sectional view showing a configuration for maintaining the elongated member in the first position.

[Explanation of symbols]

H Embroidered member 1 free arm 2 heads 3 holding frame 4 moving devices 5 mechanism 3 holding frame 4 moving devices 5 mechanism 6 Long member 9 Fixed part 10 bobbin case 20 needles 30 outer frame 31 Inner frame 32 arc-shaped part 61 spring

Claims (7)

[Claims] 1. A sewing machine for embroidery, in which a holding frame for holding a member H to be embroidered is moved forward and backward, left and right, or forward and reverse by a moving device with respect to a free arm having a hook that accommodates a bobbin case. A long member having an open top and a rounded cross section is swingably attached to the fixed portion of the sewing machine main body, and the swing range of the long end moves downward from the first position that covers at least the lower side surface of the free arm. The sewing machine for embroidery is characterized in that it is set to at least a second position where the bobbin case can be taken in and out. 2. A sewing machine for embroidery in which a holding frame for holding a member H to be embroidered is moved back and forth, left and right, or forward and reverse by a moving device with respect to a free arm having a hook that houses a bobbin case. And a long member having an open upper portion with a rounded cross section is vertically movably attached to a fixed portion of the sewing machine main body, and the vertical movement range is moved downward from a first position that covers at least the lower side surface of the free arm to move at least the bobbin. An embroidery sewing machine characterized by being set up to a second position where the case can be taken in and out. 3. A sewing machine for embroidery in which a holding frame for holding a member H to be embroidered is moved back and forth, left and right, or forward and reverse by a moving device, with respect to a free arm having a hook that houses a bobbin case. A sewing machine for embroidery, characterized in that a long member having an open upper portion that covers at least the lower side surface of the free arm is detachably attached to a fixed portion of the sewing machine main body. 4. The sewing machine for embroidery according to claim 1, wherein the elongate member is biased by a spring in a direction toward the first position. 5. The holding frame is of a type in which an inner frame is fitted to an outer frame, and an arcuate portion is formed on a front side portion of the outer frame. The sewing machine for embroidery according to any one. 6. The embroidery sewing machine according to claim 1, wherein the elongate member has a small friction coefficient on the outer peripheral surface. 7. The elongated member includes a lower surface of the free arm and
The embroidery sewing machine according to any one of claims 1 to 6, wherein at least the lower regions of both side surfaces are covered.