JPH0642984U - Clip for sandwiching processed cloth - Google Patents

Abstract

(57) [Abstract] [Purpose] In the clip for sandwiching the work cloth, when the work cloth is pulled inward of the embroidery frame during embroidery, the pressing force can be increased, and the number of parts can be reduced, and the assembly can be performed. Can be done easily. [Structure] When a long work cloth W is sandwiched by a raw fabric frame 20, the work cloth W is placed in a support groove from above the embroidery frame 22, and a first pressing piece 32 and a second pressing piece 33 of a clip are placed. To
In the state where the work cloth W is switched to the standard posture, the work cloth W is engaged with the support concave groove from the upper side. Then, the switching lever 38 is attached to the support shaft 31.
Is rotated about the center to elastically deform both the pressing pieces 32 and 33, and the supporting shaft 31 is switched to the open / expanded posture in which the supporting shaft 31 is positioned below the point of action on the side wall of the tip pressing portion of the pressing pieces 32 and 33. . Then, the elastic fastening piece 39 rotates around the support shaft 31 as the second pressing piece 33 expands outward, and the work cloth W is formed between the elastic pressing piece 39 and the side wall of the support groove by the pressing pieces 32 and 33.
Is pinched.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work cloth holding clip for holding a long work cloth between embroidery frames.

[0002]

[Prior art]

 Conventionally, various embroidery machines have been put into practical use, such as a single-head embroidery machine having only one sewing machine arm section and a multi-head embroidery machine having a plurality of sewing machine arm sections. For example, a multi-head embroidery machine is a rectangle for attaching a plurality of flat frames holding work cloths so that the same embroidery pattern can be simultaneously formed on the number of work cloths corresponding to the number of sewing machine arms. It has been proposed that a movable frame in the shape of a ring be configured to be driven in the X-axis direction and the Y-axis direction.

By the way, in this type of multi-head embroidery machine, it is also possible to sew the same embroidery pattern on a long work cloth such as a piece of cloth at a plurality of locations. In this case, a rectangular raw fabric frame is attached to the inner periphery of the movable frame, a long work cloth is placed on one side of the raw fabric frame, and the work cloth is clamped by the work cloth holding clip. It was configured to hold. As a conventional clip for sandwiching the work cloth, there is one disclosed in Japanese Patent Publication No. 1-54462, and this clip is, as shown in FIG. 6, between the rail 101 of the embroidery frame 100 and The work cloth W is sandwiched between a first pressing piece 103 and a second pressing piece 104, and a central grip web 105 connecting the inner end portions thereof is integrally formed, and an elliptical opening is formed inside the grip web 105. The expanding rod 106 is arranged, and the manual lever 107 is fixed to the expanding rod 106.

Then, by rotating the manual lever 107 to make the major axis of the elliptical cross section of the expanding rod 106 horizontal, the first pressing piece 103 and the second pressing piece 104 are expanded and both pressings are performed. The work cloth W is sandwiched between the pieces 103 and 104 and the rail 101. Further, when the work cloth W is taken out from the embroidery frame 100, the first lever 103 and the second pressure lever 103 are rotated by rotating the manual lever 107 to make the major axis of the elliptical cross section of the expanding rod 106 vertical. The piece 104 is switched to the reference posture, and the work cloth holding clip 112 is removed from the rail 101.

[0005]

[Problems to be solved by the device]

 However, in the above-mentioned conventional clip for clamping the work cloth, it is necessary to use the expanding rod 106 having an elliptical cross-sectional shape, and the manual lever 107 connected to the expanding rod 106 is screwed by the screw 108. , Must be fixed to the expanding rod 106. Moreover, the pressing member 110 for pressing the work cloth W against the base plate 109 must be attached to the first pressing piece 103 with the screw 111, and the number of parts is increased and the assembling work is complicated accordingly. There was a problem that became.

The present invention has been made to solve the above-mentioned problems, and an object thereof is to provide a work cloth holding clip which can reduce the number of parts and can be easily assembled. Another object of the present invention is to provide a work cloth holding clip which can further increase the pressing force when the work cloth is pulled inward of the embroidery frame during embroidery.

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the work cloth holding clip according to claim 1 is engaged with a support concave groove provided on the inner peripheral portion of the embroidery frame over substantially the entire length thereof and opened upward to support A first pressing piece and a second pressing piece which are elastic and sandwich elastically the work cloth in cooperation with each other and are rotatably connected to each other about a support shaft. 1. Each tip pressing portion of the pressing piece and the second pressing piece is located below the support shaft, and has a substantially V-shaped reference posture that can be inserted into the supporting groove from above, and the first pressing piece and the second pressing piece. Each tip pressing part of the piece is located above the spindle, and a switching lever that switches each tip pressing part to the outer side and can switch to the substantially inverted V-shaped open / close position that can press the inner wall of the support groove. Equipped with.

According to a second aspect of the present invention, there is provided a work cloth holding clip in which the switching lever is formed integrally with the first pressing piece and is formed integrally with the second pressing piece on the outer side of the support groove on the side of the first pressing piece. The wall is provided with an elastic clamping piece that can be pressed.

[0009]

[Action]

 In the clip for sandwiching the work cloth according to claim 1 having the above structure, when the long work cloth is sandwiched by the raw fabric frame, the work fabric is placed on the support groove from above the embroidery frame, The first pressing piece and the second pressing piece are engaged with the support groove from the upper side of the work cloth in a state where the first pressing piece and the second pressing piece are switched to the reference posture. Then, the switching lever is rotated about the support shaft to elastically deform both pressing pieces, and the support shaft is switched to the open position in which it is located below the point of action on the side wall of the tip pressing portion of both pressing pieces. , The work cloth is sandwiched between the pressing piece and the side wall of the support groove. On the other hand, the elastic tightening piece integrally formed with the second pressing piece according to claim 2 rotates around the support shaft as the second pressing piece expands outward, and the second pressing piece opens and expands. In the posture, it comes to press and engage with the outer side wall of the supporting groove.

Note that the work cloth shrinks inward as the embroidery is performed, and accordingly, the first pressing piece and the second pressing piece try to return from the open / expanded posture to the reference posture. Since both pressing pieces are switched from the standard posture to the open / expanded posture beyond the line where the working point of the support shaft and the tip pressing portion where the pressing force is the largest is on a straight line, both pressing pieces are It does not disengage from the support groove, and it only deforms in the direction that exerts the most pressing force, so the pressing force of the clip increases.

Further, in the work cloth holding clip according to the second aspect, the switching lever is integrally formed with the first pressing piece and the elastic tightening piece is integrally formed with the second pressing piece. Since the work cloth holding clip can be configured only from the shaft, the number of parts is reduced, and the work cloth holding clip can be easily assembled.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is a case where the present invention is applied to a holding clip for holding a long work cloth in an embroidery frame provided in a multi-head embroidery machine, and FIG. 1 is a schematic perspective view of the multi-head embroidery machine. It is a figure. As shown in FIG. 1, a multi-head embroidery machine M of the present embodiment supports a sewing machine having a substantially rectangular shape in plan view having a predetermined length in the left-right direction on the rear side of the upper surface of a base frame 1 extending in the left-right direction. A board 2 is disposed, and three embroidery sewing machines MH are arranged on the sewing machine support board 2 in a row in the left-right direction at predetermined intervals. At the front end of the arm portion 3 of the embroidery sewing machine MH, needle bar cases 7 having 12 needle bars (not shown) arranged in a row in the left-right direction are mounted, and needle bars not shown in the figure are attached. The needle bar case 7 can be moved in the left-right direction by the bar switching mechanism, and the needle bar for forming embroidery stitches with the embroidery thread of a desired color can be selectively selected.

On the other hand, as shown in FIG. 1, the bed body 5 at the lower end of the pedestal 4 connected to the arm 3 is mounted on the sewing machine support plate 2, and the bed body 5 extends from the front end to the cylinder bed. 6 extends forward, and a thread catcher (not shown) is provided at the front end of the cylinder bed 6, and the embroidery thread of a desired color can be formed by cooperation with the sewing needle 8 attached to the selected needle bar. Embroidery stitches are formed on the work cloth W. Here, an upper shaft (not shown) for moving the needle bar and the balance 9 up and down and a lower shaft (not shown) for rotating the thread catcher are provided by a V belt 10 connected to a sewing machine motor (not shown). It is driven by a drive shaft 11 that is rotationally driven.

Further, as shown in FIG. 1, a work table 13 is arranged on the front side of the sewing machine support plate 2 so as to be substantially level with the upper surface of the cylinder bed 6, and this work table 13 is provided. A movable frame 16 having a rectangular shape in a plan view extending in the left-right direction is placed on a pair of auxiliary tables 14 and 15 including the work table 13 provided on both left and right sides of the work table 13. The drive frame portion 16a at the right end of the movable frame 16 is driven to move in the X-axis direction (left-right direction) by an X-axis drive mechanism (not shown), and the drive frame portion 16b at the left end thereof and the drive frame portion 16b. The portion 16a and the portion 16a are simultaneously moved and driven in the Y-axis direction (front-back direction) by a Y-axis drive mechanism (not shown). Therefore, the movable frame 16 can be moved on the XY plane by the X-axis drive mechanism and the Y-axis drive mechanism.

Next, the original frame 20 that holds the long work cloth W between the movable frames 16 will be described with reference to FIGS. 2 to 5. Here, FIG. 2 is a perspective view showing a part of the work cloth holding clip and the original frame, and FIG. 3 is a view showing a reference posture in which the work cloth holding clip is fitted into the support groove, and is a line A--A in FIG. Similarly, FIG. 4 is a vertical side view showing a state in which the work cloth holding clip is switched to the open / expanded position to hold the work cloth. Further, FIG. 5 is a side view in vertical section showing a state of the work cloth holding clip when the work cloth is pulled inward in the open and expanded position.

As shown in FIG. 3, on the inner peripheral portion of the movable frame 16, an attachment portion 16a that is one step lower than the movable frame 16 is integrally formed with the movable frame 16 over the entire length of the inner peripheral portion. The original frame 20 is attached to the rectangular mounting portion 16a by a plurality of screws 21 at the outer peripheral portion thereof, and the original frame 20 and the movable frame 16 constitute an embroidery frame 22. The original frame 20 is provided with a support groove 23 having a concave shape that opens upward as shown in FIGS. 2 to 5 over substantially the entire length of the original frame 20. As shown in FIG. 3, the support groove 23 has a flat bottom wall 24 on which the outer peripheral portion of the work cloth W can be placed, and semi-arcuate side walls 25 and 26 formed at both ends thereof. is doing. A flange 27 is formed on the outer side wall 26, and the flange 27 is fixed to the mounting portion 16a of the movable frame 16 with a screw 21.

Next, the work cloth holding clip 30 that engages with the support groove 23 and elastically holds the work cloth W in cooperation with the support groove 23 will be described. As shown in FIG. 2, the work cloth holding clip 30 has a first pressing piece 32 and a second pressing piece 33 that are elastic and connected to each other so as to be rotatable about a support shaft 31. A switching lever 38 for switching the 1st pressing piece 32 and the 2nd pressing piece 33 between the standard posture 35 (see FIG. 3) and the open / closed posture 36 (see FIG. 4), and the first pressing piece side (original) of the support groove 23. It is composed of an elastic fastening piece 39 that can be pressed against the outer surface 25b of the side wall 25 on the inner peripheral side of the opposite frame 20). Then, as shown in FIG. 2, the switching lever 38 and the first pressing piece 32 are integrally formed to form a first holding member 40, and the elastic tightening piece 39 and the second pressing piece 33 are formed. The second sandwiching member 41 is formed integrally, and the first sandwiching member 40 and the second sandwiching member 41 are connected in the X shape by the support shaft 31.

The first holding member 40 is made of an elastic material having a predetermined length, and is bent by a support shaft to be formed in a substantially V shape in a side view as shown in FIG. As shown in FIG. 2, the tip end portion of the first pressing piece 32 is formed in a semi-arcuate shape in conformity with the shape of the side wall 25 of the support groove 23 to form the tip end pressing portion 32a. The switching lever 38 is continuously formed at the center of the end of the spindle 2 on the spindle side. Further, as shown in FIG. 2, a hinge portion 42 for bearing the support shaft 31 is bent and formed at an end portion of the first pressing piece 32 on the support shaft side. As shown in FIG. 3, the switching lever 38 is formed in a long shape, and is configured so that the postures of the first pressing piece 32 and the second pressing piece 33 can be easily switched with a small force. .

The second holding member 41 is made of an elastic material having a predetermined length, and is bent by a support shaft portion to have a substantially M-shape in side view as shown in FIG. The tip end of the piece 33 is formed in a semi-circular shape in conformity with the shape of the inner peripheral surface of the side wall 26 outside the support groove 23 to form a tip pressing portion 33a, and the tip of the elastic fastening piece 39 is further formed. The portion is formed in a semi-circular shape in conformity with the outer peripheral surface shape of the side wall 25 inside the supporting concave groove 23 to form a tip fastening portion 39a. As shown in FIG. 2, a long hole 43 into which the switching lever 38 is fitted is formed in the central portion of the second holding member 41, and the support shaft 31 is provided on both left and right sides thereof. A hinge portion 44 for bearing is bent and formed. The height of the tip of the elastic fastening piece 39 is set so as to reach the tension level (embroidery level) of the work cloth W.

The reference posture 35 of the first pressing piece 32 and the second pressing piece 33 that is switched by the switching lever 38 is such that the tip pressing portions 32 a and 33 a of the first pressing piece 32 and the second pressing piece 33 are As shown in FIG. 3, it is positioned below the support shaft 31 and has a substantially V-shaped posture that can be inserted into the support groove 23 from above. Further, in the open / spread posture 36, as shown in FIG. 4, the action point P on the side walls 25 and 26 of the front end pressing portions 32a and 33a of the first pressing piece 32 and the second pressing piece 33, as shown in FIG. Is positioned above the upper side, and the tip pressing portions 32a, 33a can be oriented to the outside (directions in which the tip pressing portions 32a, 33a expand) and can be pressed against the inner surfaces 25a, 26a of the side walls 25, 26 of the support groove 23. It has an inverted V-shape.

An assembling operation of the work cloth holding clip 30 configured as described above will be described. First, each of the first holding member 40 and the second holding member 41 is cut into a desired shape from an elastic material having a predetermined length, and a hinge portion 42 is formed at the center of the first holding member 40 by bending. The tip end pressing portion 32a is formed at the tip end portion, and the central portion is bent to form a substantially V shape, and the switching lever 38 is further formed. On the other hand, in the second holding member 41, the long hole 43 and the hinge portion 44 are formed, and the tip pressing portion 33a and the tip tightening portion 39a are formed at both ends. Then, the first holding member 40 and the second holding member 41 are fitted to each other, and the support shaft 31 is passed through the hinge portions 42 and 44 thereof to complete the work cloth holding clip 30. As described above, since the work cloth holding clip 30 is composed of only the first holding member 40, the second holding member 41 and the support shaft 31, the number of parts is small and the assembling work can be easily performed.

Next, the work of holding the long work cloth W between the raw fabric frames 20 using the work cloth holding clip 30 assembled as described above will be described. First, the work cloth W is placed on the inner peripheral portion of the movable frame 16, that is, in the support groove 23 of the original frame 20 from the upper side of the original frame 20. Then, with the first pressing piece 32 and the second pressing piece 33 of the work cloth holding clip 30 switched to the reference posture 35, the work cloth W is engaged with the support groove 23 from the upper side as shown in FIG. To combine. Then, when the switching lever 38 is rotated downward about the support shaft 31, the first pressing piece 32 integrally formed with the switching lever 38 also tries to rotate around the support shaft 31. The tip pressing portion 32a of the first pressing piece 32 is restricted by the side wall 25 inside the support groove 23, and the tip pressing portion 32a expands in the direction of the side wall 25. Along with this, the tip pressing portion 33a of the second pressing piece 33 also expands in the direction of the outer side wall 26.

When the switching lever 38 is further rotated downward from this state, the tip end pressing portions 32a, 33a of the first pressing piece 32 and the second pressing piece 33 are pressed against the side walls 25, 26. 4 and elastically deforms, and as shown in FIG. 4, the support shaft 31 is switched to the open / expanded posture 36 located below the point P of action on the side walls 25 and 26 of the tip pressing portions 32a and 33a. The work piece W is held between the side walls 25 and 26 of the support groove 23 by the pressing piece 32 and the second pressing piece 33.

On the other hand, the elastic fastening piece 39 formed integrally with the second pressing piece 33 rotates around the support shaft 31 as the second pressing piece 33 expands outward, and the second pressing piece 33. In the open / expanded posture 36 of FIG. 4, as shown in FIG. 4, the outer side surface 25b of the side wall 25 inside the support groove 23 is pressed and engaged. At this time, since the lower end of the elastic fastening piece 39 is set to the tension level (embroidery level) of the work cloth W, the work cloth W is set to the tension level by the elastic fastening piece 39 as shown in FIG. The embroidery position can be set accurately in the vertical direction. The clip operation for sandwiching the work cloth sandwiching clip 30 is performed for each of the plurality of clips 30, and the work cloth W is sandwiched over substantially the entire circumference of the original frame 20. Then, the work cloth W is supported by the original frame 20 in a tensioned state.

Next, the operation of the work cloth holding clip 30 during embroidery of the work cloth W will be described. As the work cloth W is embroidered, the work cloth W contracts inward as shown by an arrow B in FIG. At this time, due to the contraction of the work cloth W, the elastic fastening piece 39 tries to expand from the position shown by the chain line in FIG. 5 to the position shown by the solid line, and the first pressing piece 32 and The second pressing piece 33 also tries to return from the open / expanded posture 36 shown by the chain line in FIG. 5 to the reference posture 35, but the both pressing pieces 32 and 33 are the same as the spindle 31 having the largest pressing force from the reference posture 35. Since the action points P of the tip pressing portions 32a and 33a cross the straight line and are switched to the open / spreading posture 36, the first pressing piece 32 and the second pressing piece 33 are shown by solid lines in FIG. As described above, it slightly deforms in the direction in which the pressing force is most exerted (the direction of arrow D). Therefore, as shown in FIG. 5, when the work cloth W is pulled inward, the pressing force of the work cloth pinching clip 30 (the pressing force in the direction of arrow C) increases, and the support groove of the work cloth W is increased. It will prevent you from pulling out from 23.

Next, the removal operation of the work cloth holding clip 30 will be described. When the embroidery of the work cloth W is completed, the switching lever 38 of the work cloth holding clip 30 is pulled upward. Then, the pulling force causes the support shaft 31 to move upward, and the first pressing piece 32 and the second pressing piece 33 are switched from the open / expanded posture 36 shown in FIG. 4 to the reference posture 35 shown in FIG. The work cloth holding clip 30 can be easily pulled out from the support groove 23.

In this way, the work cloth W can be supported by the original frame 20 with a simple structure, and even if the work cloth W contracts during embroidery, the pressing force of the work cloth holding clip 30 increases. Therefore, the work cloth W can be prevented from coming out of the support concave groove 23. Furthermore, the support groove 23 and the work cloth holding clip 30 are connected via the work cloth W, and the work cloth W causes the work cloth holding clip 30 to slide in the support groove 23. Can be prevented. Since the first pressing piece 32, the second pressing piece 33, and the elastic clamping piece 39 have elasticity, the work cloth W can be sandwiched without being affected by the thickness of the work cloth W. . Further, since the switching lever 38 is formed to be long, the posture switching operation of both pressing pieces 32 and 33 can be performed with a small operating force.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that many modifications and changes can be made within the scope of the present invention. For example, the elastic fastening piece 39 of the above embodiment is not always necessary, and the switching lever, the elastic fastening piece, etc. may not be integrally formed with each pressing piece. Further, the embroidery frame is not limited to the one in which the movable frame and the original frame are separately formed as shown in the above embodiment, but may be integrally formed.

[0029]

[Effect of device]

 As described in detail above, according to the clip for sandwiching the work cloth according to the first aspect, the first pressing piece and the second pressing piece are connected to each other so as to be rotatable about the support shaft, and both pressing pieces are: In the open and expanded position, each tip pressing portion is located above the spindle, and the tip pressing portion can be directed outward and pressed against the inner wall of the support groove, so that the work cloth is embroidered during embroidery. When it is pulled inward of the frame, it is deformed in the direction in which the pressing force is most exerted, and the pressing force on the work cloth can be further increased. Further, according to the work cloth holding clip of the second aspect, the switching lever is integrally formed with the first pressing piece and the elastic clamping piece is integrally formed with the second pressing piece. It has the excellent effect that the clip can be constructed from the shaft, the number of parts can be reduced, and the assembly work can be done easily.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a multi-head embroidery machine.

FIG. 2 is a perspective view of a work cloth holding clip.

FIG. 3 is a vertical cross-sectional side view taken along the line AA of FIG. 1 showing a reference posture in which a work cloth holding clip is fitted in a support groove.

FIG. 4 is a vertical cross-sectional side view showing a state in which the work cloth holding clip is also switched to the open and expanded position and the work cloth is held.

FIG. 5 is a vertical cross-sectional side view showing a state of the work cloth holding clip when the work cloth is pulled inward in the open and expanded position.

FIG. 6 is a vertical cross-sectional side view of a conventional work cloth holding clip.

[Explanation of symbols]

 16 movable frame 20 original frame 22 embroidery frame 23 support concave groove 25 side wall 26 side wall 30 work cloth holding clip 31 support shaft 32 first pressing piece 33 second pressing piece 35 reference position 36 open / expanding position 38 switching lever 39 elastic tightening Attachment

Claims (2)

[Scope of utility model registration request] 1. An embroidery frame is provided with an inner peripheral portion over substantially the entire length of the embroidery frame and is engaged with a support groove that is open at the upper side to elastically clamp a work cloth in cooperation with the support groove. A work cloth holding clip, which is elastic and has a first pressing piece and a second pressing piece that are elastically connected to each other so as to be rotatable about a support shaft, and each of the first pressing piece and the second pressing piece. The tip pressing portion is positioned below the support shaft, and has a substantially V-shaped reference posture that can be inserted into the support groove from above, and the tip pressing portions of the first pressing piece and the second pressing piece are the support shafts. And a switching lever which is positioned on the upper side and is capable of directing each tip pressing portion to the outside and pressing the inner wall of the support groove to switch to a substantially inverted V-shaped open / closed posture. Clip for holding. 2. The work cloth holding clip according to claim 1, wherein the switching lever is integrally formed with the first pressing piece and the second pressing piece, and is formed integrally with the second pressing piece. The work cloth holding clip according to claim 1, wherein an elastic tightening piece capable of being pressed is provided on the outer wall of the first pressing piece side.