JP2958947B2 - Cap frame device for embroidery sewing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hat frame device for an embroidery sewing machine, and more particularly to an improved hat frame moving mechanism in a Y-axis direction (a direction parallel to an arm portion of the embroidery sewing machine).

[0002]

2. Description of the Related Art Conventionally, in order to sew a colorful embroidery pattern embroidered with embroidery threads of a plurality of colors, a needle bar case having a plurality of needle bars is horizontally arranged at the front end of a sewing machine arm in the row direction of the needle bars. A multi-needle embroidery sewing machine movably supported on a sewing machine has been put to practical use. Generally, in a multi-needle embroidery sewing machine, a work cloth to be embroidered is set on an embroidery frame, and the embroidery frame is driven independently in an X direction and a Y direction (a direction parallel to an arm portion of the embroidery sewing machine). Embroidery sewing is performed in a state of being attached to the movable frame.

In order to perform embroidery sewing on the front surface of a hat, a hat frame device connected to an X-axis driving mechanism and a Y-axis driving mechanism of the movable frame is used. The hat frame device includes a base frame supported so as to be movable only in the Y-axis direction, a rotating frame rotatably mounted on the base frame around an axis parallel to the Y-axis direction, And a structure in which a base frame is omitted, and a structure in which a rotating frame and a hat frame are pivotally supported on a bed body by a guide shaft have been put to practical use. . The base frame is operatively connected to a Y-axis driving mechanism and is driven to move in the Y-axis direction. The rotating frame and the cap frame are operatively connected to an X-axis driving mechanism, and are connected to the X-axis direction. The rotation is driven via a conversion mechanism that converts the drive amount into a rotation amount about an axis parallel to the Y axis.

[0004] Among the conventional hat frame devices, in the case of the latter hat frame device having a structure mainly composed of a guide shaft, a rotating frame and a hat frame, a guide groove is formed in the outer peripheral portion of the rotating frame. Then, a rod of a predetermined length in the X-axis direction fixedly attached to the movable frame of the embroidery sewing machine is slidably engaged with the top of the guide groove, and the amount of movement drive of the movable frame in the Y-axis direction is reduced. , A transmission mechanism for transmitting the rotation frame through a rod and a guide groove to the rotating frame. The rotating frame is driven to rotate via an X-axis driving force conversion mechanism that converts the X-axis driving force of the movable frame into the rotating driving force of the rotating frame.

[0005]

Incidentally, the rod has a relatively small diameter, a length of 40 to 50 cm, and is fixed to the movable frame at both ends. Then, to prevent rattling of the front and rear movement of the rotating frame,
The rod is in sliding contact with the front and rear wall surfaces of the guide groove of the rotating frame at the center of the span without any gap.

Therefore, when the rotating frame is driven to rotate, the frictional resistance acting between the rod and the front and rear wall surfaces of the guide groove of the rotating frame and the rod are large, and the center of the span of the rod is weakly restrained. Because it is easy to vibrate, the rotating frame and the hat frame vibrate when rotating the rotating frame,
There is a problem that the quality of the embroidery sewing is reduced by the vibration. In addition, since both ends of the rod are fixed to the movable frame with screws, bolts, or the like, the work of attaching and detaching the hat frame device to and from the embroidery sewing machine is not easy. An object of the present invention is to reliably prevent vibration of the rotating frame,
An object of the present invention is to provide a hat frame device for an embroidery sewing machine that can be easily attached to and detached from the embroidery sewing machine.

[0007]

According to a first aspect of the present invention, there is provided a hat frame device for an embroidery sewing machine, which is a guide shaft oriented in a Y-axis direction parallel to an arm of the embroidery sewing machine, the guide shaft being detachably mounted on a bed body. A rotation frame for a hat frame set movably attached to the guide shaft in the Y-axis direction and rotatably around the guide axis; a hat frame detachably mounted to the rotation frame; An embroidery sewing machine having an X-axis driving force conversion mechanism for applying a rotational driving force to a rotating frame via a pair of wires from a movable frame that is independently driven to move in the Y-axis direction and the X-axis direction of the embroidery sewing machine. In the hat frame device, the movable frame is disposed along an X-axis frame portion extending in the X-axis direction of the movable frame, and is relatively movable in the X-axis direction with respect to the X-axis frame portion and relatively movable in the Y-axis direction. A Y-axis feed member that cannot be used is provided, and the Y-axis feed member is It is provided with a Y-axis feed transmission mechanism for interlocking connection to.

According to a second aspect of the present invention, in the hat frame device for an embroidery sewing machine according to the first aspect, the Y-axis feed transmission mechanism includes a connecting member for connecting the Y-axis feed member to a rotating frame; The vehicle includes a predetermined mounting portion formed on the member, and a clamp mechanism capable of fixing the base end of the connecting member to the predetermined mounting portion so as to be capable of releasing the fixing.

[0009]

In the hat frame device for an embroidery sewing machine according to the first aspect, when the movable frame is driven in the Y-axis direction, the Y-axis feed member is driven in the Y-axis direction, and the Y-axis feed member moves in the Y-axis direction. As a result, the rotating frame is driven to move in the axial direction via the Y-axis feed transmission mechanism. When the movable frame is driven in the X-axis direction,
The driving force in the X-axis direction is converted by the X-axis driving force converting mechanism into the turning driving force of the turning frame, and the turning frame is turned. As described above, since the Y-axis feed member and the Y-axis feed transmission mechanism are provided, the vibration factor of the rotating frame can be eliminated, and the quality of embroidery sewing can be improved.

In the hat frame device for an embroidery sewing machine according to a second aspect, the Y-axis feed transmission mechanism includes a connecting member, a mounting portion formed on the Y-axis feeding member, and a base end of the connecting member connected to the mounting portion. Since the clamp mechanism is provided so that it can be released from below, the connection / disconnection of the Y-axis feed transmission mechanism to / from the embroidery machine can be easily performed by fixing / releasing the clamp mechanism. .

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, the present invention is applied to a cap frame device for a multi-needle embroidery sewing machine provided in a multi-head embroidery machine. The multi-head embroidery machine SM will be described. As shown in FIG. 1, a substantially rectangular sewing machine support plate 2 extending in the left-right direction is provided on the rear side of the upper surface of the embroidery machine base frame 1 extending in the left-right direction (X direction). Are arranged on the sewing machine supporting plate 2 and three multi-needle embroidery sewing machines M1 to M1 having the same structure.
M3 are juxtaposed on the left and right at an interval.

In each of these embroidery machines M1 to M3, twelve needle bars (not shown) arranged in a line in the left-right direction are supported at the front end of the arm portion 3 so as to be vertically movable. Needle bar cases 7 that support the twelve balances 9 in a swingable manner are each supported so as to be horizontally movable in the left-right direction. On the other hand, a pillar 4 is connected to the arm 3, and the pillar 4
The bed body 5 connected to the lower end of the bed is fixed on the sewing machine support plate 2, and a cylinder bed 6 extends forward from the front end of the bed body 5. A vessel (not shown) is provided.

As shown in FIG. 1, a sewing needle 8 is attached to the lower end of each needle bar, and twelve sewing needles 8 are provided with embroidery threads of 12 colors from 12 thread stands 11 of a thread stand 10. The needle bar case 7 is supplied in the left and right directions, and the desired one sewing needle 8 is positioned at the sewing position facing the needle hole at the tip of the cylinder bed 6 so that one of the needle bars is selected. Then, only the needle bar and the balance 9 corresponding to the needle bar are driven up and down, and embroidery stitches are formed on the work cloth with the embroidery thread of the color selected by the cooperation of the sewing needle 8 of the needle bar and the thread catcher. It is formed.
Here, an upper shaft for vertically moving the needle bar and the balance 9 and a lower shaft (not shown) for rotating the thread catcher are driven by a V-belt 17 connected to a sewing machine motor (not shown). Driven by 18.

On the front side of the sewing machine support plate 2, there is provided a work table 13 having the same height as the upper surface of the cylinder bed 6, and this work table 13 and the left and right sides of the work table 13 are provided. A pair of auxiliary tables 14,
A movable frame 16 extending in the left-right direction is placed on the movable frame 16. A drive frame 16a at the right end of the movable frame 16 is driven to move in the X direction by an X-axis drive mechanism (not shown),
The drive frame 16b and the drive frame 16a at the left end are simultaneously moved and driven in the Y direction by a Y-axis drive mechanism (not shown). That is, the movable frame 16 is independently moved and driven on the tables 13 to 15 in the X direction and the Y direction by the X-axis driving mechanism and the Y-axis driving mechanism.

Next, a description will be given of a cap frame device attached to each embroidery sewing machine. As shown in FIGS. 2 to 4, the hat frame device 20 includes a guide shaft 21 extending in the Y-axis direction, a rotation frame 40 rotatably mounted on the guide shaft 21, and a hat attached to the rotation frame 40. And a hat frame 50 which is detachably mounted to mount the frame, and an X which converts a driving force in the X-axis direction of the movable frame 16 into a rotating driving force of the rotating frame 40 and the hat frame 50.
A shaft driving force conversion mechanism 60 and a Y-axis driving mechanism, which are disposed below the X-direction frame 16c on the rear end side of the movable frame 16 and
Y-axis feed transmission mechanism 7 that operatively connects base frame 30 to Y-axis feed member 28 that is moved and driven only in the axial direction.
0, etc.

The guide shaft 21 will be described. The guide shaft 21 is located at the base end 5 of the cylinder bed 6 at the base end.
Is removably mounted from the front in a horizontal mounting hole 22 oriented in the Y-axis direction, and is fixed to the bed main body 5 in a releasable manner by a fixing tool 23. Next, the rotating frame 4
0 will be described.
An arc member 41 having an arc cross section of 0 degrees is provided, and a wire 6 of the X-axis driving force conversion mechanism 60 is provided on an outer peripheral portion of the arc member 41.
3 is formed on the outer periphery of the arc member 41, and the cap frame 50 is engaged with the engaging hole of the cap frame 50 mounted on the arc member 41 so as to be externally fitted thereto. 40
There are provided four engaging rollers 45 which are detachably held by the elastic member by a spring member. A frame body member 44 is provided for connecting the left and right lower ends of the arc member 41 to each other. The left and right ends of the arc member 41 are fixed to the corresponding ends of the frame body member 44 with four screws 46. Have been.

A cylindrical portion 47 is integrally formed at the center of the span of the frame main body member 44, and a shaft hole 48 is formed in the cylindrical portion 47 so as to be concentric with the center of the arc member 41. The rotating member 40 is inserted through the shaft hole 48 and the guide shaft 2
1. Next, the cap frame 50 will be described. The cap frame 50 has an arc-shaped mounting portion 5 which is fitted to the arc member 41 of the rotating frame 40.
1 and a frame-like portion 52 extending to the front side thereof are formed. The mounting portion 51 is formed with four engagement holes with which four engagement rollers 45 respectively engage. An opening 53 corresponding to the embroidery area is formed, and the cap can be held by a pressing member 54 made of a spring member.

Next, the X-axis driving force conversion mechanism 60 will be described. The conversion mechanism 60 is fixed on the upper surface of the X-direction frame portion 16c on the rear end side of the movable frame 16 with screws 65 at predetermined left and right intervals. A pair of left and right mounting plates 61, a rod 62 connecting the two mounting plates 61, and a pair of wires 63 are mainly configured. The left end of the first wire 63 is connected at one end to a bracket 64 fixed to the left mounting plate 61, and the wire 63 passes through the wire guide groove 43 of the rotating frame 40 and the right end of the wire guide groove 43. Side, is fixed to the right end of the rotating frame 40 with a screw 66,
The right end of the second wire 63 is connected to the right mounting plate 61.
The wire 63 is connected at one end to a metal fitting 64 fixed to the rotating frame 40, is guided to the left end side of the wire guiding groove 43 through the wire guiding groove 43 of the rotating frame 40, and is screwed to the left end of the rotating frame 40. It is fixed at 66.

Therefore, when the movable frame 16, that is, the X-direction frame 16c is driven to move leftward, the rotating frame 40
Is rotated counterclockwise in FIG. 4 around the axis of the arc member 41 (that is, around the guide shaft 21), and when the X-direction frame 16a is driven to move rightward, The moving frame 40 is rotated clockwise around the axis of the arc member 41. The rotation angle of the rotation frame 40 is
It is proportional to the amount of movement of the X-direction frame 16c in the left-right direction.

Next, the Y-axis feed transmission mechanism 70 will be described. The transmission mechanism 70 is provided with a connecting member 71 for connecting the Y-axis feed member 28 to the rotating frame 40, and is attached to the connecting member 71. A clamp mechanism 72 for releasably fixing the base end of the member 71 to the Y-axis feed member 28
And the wire guide groove 4 fixed to the front end of the connecting member 71.
3 mainly includes an engaging member 73 slidably engaged with the engaging member 3.

The Y-axis feed member 28 is connected to the X-direction frame 16.
The Y-axis feed member 28 is formed with a predetermined mounting portion 76 for detachably connecting the connecting member 71 to the Y-axis feed member 28.
As shown in FIG. 2, a circular hole 77, a small-diameter elongated hole 78 extending in the X direction connected to the left end thereof, and a pair of X directions formed on both sides of the circular hole 77 and the elongated hole 78, as shown in FIG. An orientation slit 79 is formed.

The connecting member 71 is disposed below the Y-axis feed member 28 on the cylinder bed 6, and the base end of the connecting member 71 has a flat plate portion 7 corresponding to the mounting portion 73.
4 is formed, and the connecting member 71 includes the flat plate portion 7.
A V-shaped connecting arm 75 extending forward from 4 and having a shallow cross section is formed on the lower surface of the left half of the front end of the connecting arm 75.
The engaging member 73 is fixed in an inclined manner equal to the inclination of the corresponding portion of the wire guide groove 43. This engagement member 73
Is made of a low-friction synthetic resin material (for example, nylon or the like) so that the contact resistance with the wire guide groove 43 is reduced. Incidentally, the engaging member 73 may be constituted by rolling guide means such as rollers and rollers. A pair of left and right positioning pins 80 respectively engaging with a pair of slits 79 are provided upright on the upper surface of the flat plate portion 74 of the connecting member 71.

Next, the clamp mechanism 72 provided in the Y-axis feed transmission mechanism 70 will be described. The clamp mechanism 72 includes a top plate 82 and a top plate 8 which enter the circular hole 77.
Shaft member 8 having an upright shaft portion 83 connected to the lower surface of the shaft member 2
1, a shaft member 81 having a screw portion formed in a lower half thereof, and a thumb screw 85 screwed to the screw portion via a washer 84. When the flat plate portion 74 of the connecting member 71 is fixed to the mounting portion 76 of the Y-axis feed member 28 by the clamp mechanism 72, the thumb screw 85 is loosened, and the top plate portion 82 is held while the shaft member 81 is held at the fixed release position. Is inserted through the circular hole 77 and a pair of positioning pins 80 are inserted.
Are fitted into the pair of slits 79, and the shaft member 8
After the first shaft portion 83 is engaged with the long hole 78, the thumb screw 85
When the shaft member 81 is switched to the fixed position, the flat plate portion 74, which is the base end portion of the connecting member 71,
8 is fixed to the mounting portion 73.

Next, the operation of the cap frame device described above will be described. The rotating frame 40, the X-axis driving force conversion mechanism 60, and the Y-axis feed transmission mechanism 70 are unitized as a hat frame unit, and a mounting method when the hat frame unit is mounted on the embroidery sewing machines M1 to M3. Will be described. First, the guide shaft 21 is removed, and the clamp mechanism 7
In a state where the fixing member 2 is released and the engaging member 73 is engaged with the wire guide groove 43, the cap frame unit is moved from the front, and the shaft member 81 of the clamp mechanism 72 is positioned directly below the circular hole 77. Then, when the cap frame unit is moved upward, the top plate portion 82 of the shaft member 81 is inserted into the circular hole 77, and the pair of positioning pins 80 are inserted into the pair of slits 79.
It will be in the state inserted. Next, the cap frame unit is moved rightward to engage the shaft portion 83 of the shaft member 81 with the elongated hole 78, and then the clamp mechanism 72 is set in a fixed state.

Next, after or before the fixing by the clamp mechanism 72, the guide shaft 21 is moved from the front to the frame main body member 44.
Shaft hole 48 of cylindrical portion 47 and mounting hole 22 of bed body 5
After that, the guide shaft 21 is fixed by the fixture 23. In this state, the connecting member 71 and the rotating frame 40 can transmit the driving force in the Y-axis direction through the engagement between the engaging member 73 and the wire guide groove 43. Next, X
The pair of plate members 61 of the shaft driving force conversion mechanism 60 are positioned on the upper surface of the X-direction frame 16c with the positioning pins 64, and then fixed to the upper surface of the X-direction frame 16c with screws 65. When removing the cap frame unit, the cap frame unit can be easily removed in a procedure substantially opposite to that of the above-described mounting.

As described above, except that a pair of screws 65 for fixing the pair of plate members 61 to the X-direction frame portion 16c are mounted.
The hat frame unit can be attached to and detached from the embroidery sewing machines M1 to M3 without attaching or detaching any screws or bolts. However, the turning operation of the fixture 23 is necessary. In addition, the clamp mechanism 72 is provided in the Y-axis feed transmission mechanism 70 so that the connection member 71 and the Y-axis feed member 28 can be easily fixed and released, so that they are fixed without using screws or bolts. And unlocking became possible.

Next, after the cap frame unit is mounted as described above, a cap frame 50 on which a cap is separately set outside the machine is set.
When the movable frame 16 is driven in the X-axis direction when the embroidery sewing is performed by attaching to the rotation frame 40, the rotation frame 40 and the hat frame 50 are rotationally driven by the X-axis driving force conversion mechanism 60, When the movable frame 16 is driven in the Y-axis direction,
The shaft feed member 28 is driven in the Y-axis direction, and the rotation frame 40 and the hat frame 50
Driven in the axial direction.

When the rotating frame 40 rotates, the engaging member 73 is made of a short and low friction material, so that the frictional force acting between the engaging member 73 and the wire guide groove 43 becomes small. Thereby, the rotation frame 40 rotates smoothly. In addition, the rigidity of the connecting arm 75 of the connecting member 71 of the Y-axis feed transmission mechanism 70 is high, and the engaging member 73 is configured to be hard to vibrate. No extra force is applied from the engaging member 73, and the problem that the rotating frame 40 vibrates up and down and the quality of embroidery sewing is deteriorated does not occur.

Here, a part of the above embodiment may be modified as follows. 1) Instead of the two wires 63 of the above embodiment, one continuous wire is connected to the left plate member 61 and the right screw 6.
6, a screw 66 on the left side, and a plate member 61 on the right side may be wound around in this order. 2) The Y-axis feed transmission mechanism 70 may be provided not only in one set but also in one pair on the left and right.

3) Instead of the clamp mechanism 72,
The following clamp mechanism may be applied. As shown in FIG. 5, the clamp mechanism 72A includes a shaft member 90 having a top plate portion 91 that enters the circular hole 77 and a vertical shaft portion 92 that is continuous with the lower surface of the top plate portion 91. The shaft member 90 is pin-connected with the
And an operation lever 94 that switches between a fixed position in which the control member is brought closer to the connecting member 71 and a fixed release position in which the fixed member is raised above the fixed position. The upper end of the operation lever 94 is formed in a curved shape, and a fulcrum member 95 for supporting the curved portion is attached to the connecting member 71. When the operation lever 94 is set to the position shown by the solid line in FIG. When the operation lever 94 is in the release position and the operation lever 94 is in the posture of the chain line in FIG. 5, the shaft member 90 is in the fixed position. 4) Within the scope of the technical idea of the present invention, various changes may be made to the mechanism of each part of the embodiment based on existing technology or technology obvious to those skilled in the art.

[0031]

As described above, according to the hat frame device for an embroidery sewing machine of the first aspect, since the Y-axis feed member and the Y-axis feed transmission mechanism are provided, the relatively high rigidity of the Y-axis feed transmission is provided. The mechanism connects the Y-axis feed member and the rotating frame,
The quality of embroidery sewing can be improved by eliminating the vibration factor of the rotating frame. According to the hat frame device of claim 2,
The Y-axis feed transmission mechanism includes a connecting member, a mounting portion formed on the Y-axis feeding member, and a clamp mechanism that can fix the base end of the connecting member to the mounting portion so that the base end of the connecting member can be released from below. By fixing / releasing the clamp mechanism, the connection / disconnection of the Y-axis feed transmission mechanism to / from the embroidery sewing machine can be easily performed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a multi-head embroidery machine according to an embodiment.

FIG. 2 is a plan view of a main part of the hat frame device mounted on the embroidery sewing machine of FIG. 1;

FIG. 3 is a side view of the hat frame device of FIG. 2;

FIG. 4 is a front view of the hat frame device of FIG. 2;

FIG. 5 is a front view of a clamp mechanism as a modification of the Y-axis feed transmission mechanism of the hat frame device.

[Explanation of symbols]

 M1 to M3 Embroidery sewing machine 3 Arm unit 20 Hat frame device 21 Guide shaft 28 Y-axis feed member 40 Rotating frame 50 Hat frame 60 X-axis driving force conversion mechanism 63 Wire 70 Y-axis feed transmission mechanism 71 Connecting member 72, 72A Clamp mechanism 76 Mounting part 74 Flat part (base end of connecting member)

Claims (2)

(57) [Claims] 1. A guide shaft which is parallel to an arm of an embroidery sewing machine and is oriented in a Y-axis direction, the guide shaft being detachably mounted on a bed body, and the guide shaft being movable in the Y-axis direction on the guide shaft. A rotation frame for a hat frame set rotatably mounted around, a hat frame removably mounted on the rotation frame, and independently driven to move in the Y-axis direction and the X-axis direction of the embroidery sewing machine. An embroidery sewing machine cap frame device provided with an X-axis driving force conversion mechanism for applying a rotation driving force to a rotation frame from a movable frame via a pair of wires. An Y-axis feed member is provided along the extending X-axis frame portion and is relatively movable in the X-axis direction with respect to the X-axis frame portion, and is relatively immovable in the Y-axis direction. Y linked to the rotating frame
A hat frame device for an embroidery sewing machine, comprising a shaft feed transmission mechanism. 2. The Y-axis feed transmission mechanism includes: a connecting member that connects the Y-axis feed member to a rotating frame; a predetermined mounting portion formed on the Y-axis feed member; The cap frame device for an embroidery sewing machine according to claim 1, further comprising: a clamp mechanism that can fix a base end portion of the connecting member so that the base member can be released.