JP2524132B2 - Drive unit of curved cloth tension frame for embroidery sewing machine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a curved cloth tension frame for an embroidery sewing machine, which is used when an embroidery stitch is sewn into a sleeve, such as a sleeve of a hat or a shirt, and more specifically, The present invention relates to a driving unit for advancing and retracting a frame in the direction of the cylinder center and for reciprocating rotation around the cylinder center.

(Prior Art) In a conventional drive unit of a curved cloth tension frame for an embroidery sewing machine, as shown in, for example, Japanese Patent Laid-Open No. 60-252759, an operating frame is provided with a horizontally long fitting groove, This is fitted with a mating brim provided on the curved cloth tension frame so that the longitudinal movement of the actuating frame causes the curved cloth tension frame to move back and forth in the direction of its tube center. A cord is stretched between them, and the cord is attached to the curved cloth tension frame in a plowing shape and elastically, and the curved cloth tension frame is centered on the tube center by the left and right movement of the operating frame. I was supposed to rotate back and forth.

(Problems to be Solved by the Invention) In the above conventional products, there are problems that the structure for driving the bending cloth tension frame is complicated and the cost is high, and that maintenance and inspection are difficult.

That is, the operation frame is connected to the bending cloth tension frame within a narrow range between the front edge of the operation frame and the rear end of the bending cloth tension frame. Therefore, in a narrow place, the structure of the fitting including the fitting groove for the forward and backward movements and the brim for the fitting, and the driving structure including the pair of strings for the rotation are superposed.
When the two configurations are arranged, at the time of maintenance and inspection, there is a work of bringing the fitting groove “close” to the fitting brim and fitting it with the click dust, and a small gap between the two fitting together. It is necessary to carry out the work of tensioning the string body using elastic force (winding spring) with the "pin" without loosening, in parallel. The first problem is that this work is difficult, requires skill, and is time-consuming to adjust.

Secondly, when the fitting brim is fitted in the fitting groove, the inner cord cannot be directly viewed from the outside, and there is a problem that the looseness of the cord cannot be frequently checked.

Thirdly, there is a problem in that the labor required to form the horizontally long groove for fitting in the actuating frame is great and the cost is increased.

The present invention, except for the above-mentioned three problems of the related art, facilitates the assembling work at the time of maintenance and inspection, and also makes it easy to inspect the tension of the string, and further, it is possible to provide a simple configuration and inexpensive. The present invention intends to provide a drive unit for the curved cloth tension frame for the embroidery sewing machine.

(Means for Solving the Problems) The drive portion of the curved cloth tension frame for embroidery sewing machine of the present invention is arranged such that the operating frame can be freely moved in the front-back and left-right directions with respect to the machine frame. On the other hand, a curved cloth tension frame having a cloth tension portion on a part of its peripheral surface is moved back and forth in the direction of the cylinder center to make it parallel to the moving surface of the working frame, and the cloth centered on the cylinder center. In the drive section of the music cloth tension frame for an embroidery sewing machine, which is capable of freely reciprocating rotation of the tension section and is capable of rotating and back and forth movement of the music cloth tension frame by left and right and forward and backward movements of the operating frame. The drive is
The cords are extended from both sides of the actuating frame toward the peripheral surface of the curved cloth tension frame, respectively, and the ends of the cords extend over the peripheral surface of the curved cloth tension frame, which are beyond the cylinder center position of the curved cloth tension frame. When moving the operating frame to the left and right in a plane parallel to the cylinder core, the bending cloth tension frame follows the left and right rotation directions via the cord body, and By fixing a part of the cord attached to the peripheral surface of the frame to a part of the curved cloth tension frame and moving the operating frame back and forth in a plane parallel to the cylinder center, The tension frame is made to follow the forward and backward movement directions through the cord body.

(Operation) When the operating frame moves left and right in the plane parallel to the cylinder center, the bending cloth frame rotates left and right through the cord, and the operating frame moves back and forth in the plane parallel to the center. When doing, it moves back and forth in the front-back direction via the cord body that is partially fixed to the curved cloth tension frame.

(Example) Hereinafter, drawings showing an example of the present application will be described. First
In FIG. 7 to FIG. 7, 1 is a machine frame, 2 is a head whose base is attached to the upper surface of the base frame 1, and 3 is an embroidery needle provided at the tip of the head 2, which is vertically movable as is well known. It is provided. Reference numeral 4 denotes a bed disposed below the head 2, the base of which is fixed to the machine frame 1, and the tip of which is provided with a needle plate 5 having a hole 5a facing the embroidery needle 3. Further, as is well known, a shuttle is provided inside. A movable frame 6 is mounted on the upper surface of the machine frame 1, and is moved by a moving mechanism (not shown) in the front-back direction (arrow X
Direction) and the left-right direction (arrow Y direction) based on a predetermined program or the like. Next, 7 is a bearing shaft fixedly attached to the machine frame 1, and its axial direction is aligned with the X direction. Reference numeral 9 denotes a curved cloth tension frame which is attached to the support shaft 7 so as to be rotatable and movable back and forth in the axial direction. When the curved cloth tension frame 9 is not provided, a known cloth tension frame is attached to the movable frame 6 so that embroidery can be performed by a known method. In the curved cloth tension frame 9, 10 is a frame body formed in a hollow cylindrical shape, and is a first body on the base side.
11 and a second main body 12 on the tip end side. A plurality of fitting recesses 13 are formed in the first main body 11. Reference numeral 14 denotes a fitting convex portion formed on the second main body 12, which is formed so as to be fitted into the fitting concave portion 13 so as to integrate the first main body 11 and the second main body 12 in the rotational direction. . Reference numeral 15 is an engaging hole formed in the first main body 11, 17 is a connecting body having a spring property attached to the outer periphery of the second main body by a mounting screw 18, and the engaging portion for engaging the engaging hole 15 at the tip thereof. A joint portion 19 is formed.
A plurality of the connecting bodies 17 are used. Reference numeral 20 is a support piece provided inside the first main body 11, and has a metal 21 at the cylinder center position of the curved cloth tension frame 9, and the metal 21 rotates with respect to the support shaft 7 and the axial direction (tube). It is fitted so that it can be moved freely (in the direction of the heart). 23 is a cloth tension portion formed on the upper side of the second main body 12,
This is a surface for applying the outer peripheral portion of the hat 24, which is exemplified as a sewing object. Reference numeral 25 denotes a through hole formed in the upholstered portion 23 of the second body and has a window-like wide area (the opening angle with respect to the axis of the body 12 is 120 °, for example). Hereinafter also referred to as an embroidery window. A plurality of cloth pressers 26 are attached to the second main body 12.

Next, 30 is an operating frame which is detachably fixed to the movable frame 6 by a mounting screw 30a, and 33 and 34 are strings for driving the operating frame 3
It is stretched in an X shape between 0 and the curved cloth tension frame 9. Above string 3
3,34 is made of an elastic plate with a small expansion and contraction rate, for example, a spring plate of stainless steel or steel.
2 to 0.5 mm, A in Fig. 7 is 20 mm, B is 15 mm, both cords 33, 34
Is 612 mm (when the curved cloth tension frame 9 has a diameter of 153 mm). The bases of the cords 33 and 34 are set screws 3 respectively.
It is fixed to both sides of the actuating frame 30 by 5,36, and they extend toward the outer peripheral surface of the body 12 located between them, and the bearing shaft 7
After being fitted to the outer peripheral surface beyond, it is fixedly fixed to the main body 11 by a fixing screw 37 at a common fixing portion. In this state, both cords 33, 34 are tightly tensioned between the actuating frame 30 and the curved cloth tension frame 9. Below the cords 33, 34, if the locations shown in (B) and (B) of FIG. Part along the outer circumference of 11 (c)
Is unnecessary and can be omitted. Two strings 34 are provided in parallel with each other, but one of them, that is, the part (f) between points (d) and (e) in FIG. 7 may be omitted. Furthermore, although band-shaped cords are used as the cords 33, 34 in this example, they may be referred to as ordinary cords having a round or square cross section. Reference numeral 38 denotes a collar attached to the main body 11, which is provided auxiliary to prevent the cord bodies 33, 34 from moving in the case of movement in the direction of the tube center of the curved cloth frame 9. .

In the case of the above-mentioned structure, for example, when it is desired to embroider the outer periphery of the cap 24, the cap 24 is attached to the cloth-covered portion 23 of the cap with the second main body 12 removed from the first main body 11 as shown in FIG. After mounting, the second body 12 is connected to the first body 11.
(The hat 24 may be attached while the second main body 12 is still attached to the first main body 11.) When the embroidery sewing machine is subsequently operated, the embroidery needle 3 moves up and down through the window 25 toward the bed 4 and is well known. Sew the embroidery thread to the embroidery part of the hat 24 as described above. Further, the movable frame 6 is moved back and forth, left and right in accordance with a preset embroidery pattern, and the movement of the movable frame 6 advances and retracts to and from the bending cloth tension frame 9 through the operation frame 30 and the cords 33 and 34 as described below. It is transmitted as motion and left / right rotation. As a result, a predetermined embroidery is applied to the hat.

Next, the transmission of the operation from the operation frame 30 to the curved cloth tension frame 9 will be described. When the movable frame 6 is moved in the front-rear direction (X direction), the cords 33 and 34 are tightly (without loosening) stretched between the actuating frame 30 and the bending cloth tension frame 9, so that the movable frame 6 is moved. 6 is transmitted to the bending cloth tension frame 9 through the cords 33 and 34 partially fixed to the actuating frame 30 and the fastening portion 37 of the main body 11, and the bending cloth tension frame 9 shown in FIG. ), As shown in (B), it moves back and forth in the direction of the cylinder center. In this case, since the cord bodies 33, 34 having the flat plate cross section have a very large rigidity in the tube center direction of the curved cloth tension frame 9, the movement of the actuation frame 30 by the movable frame 6 even if the movement frame 30 is slightly moved back and forth. It is immediately (without delay) transmitted to the curved cloth tension frame 9 via the cords 33, 34. Therefore, the forward / backward movement of the curved cloth tension frame 9 exactly coincides with the forward / backward movement of the movable frame 6 (without mechanical dimensional error and time delay). As a result, an accurate embroidery pattern is drawn on the hat 24.

Further, when the movable frame 6 is moved in the left-right direction, the movement of the movable frame 6 is changed as shown in FIGS. 5 (A) and 5 (B).
Is transmitted to the bending cloth tension frame 9 via the, and the frame 9 rotates left and right around the support shaft 7. That is, in FIG. 5 (A), the operating frame
When 30 moves to the left, the string 34 is pulled by it and moves to the left. As a result, the cord 34 pulls the curved cloth tension frame 9 in the direction of the arrow and rotates it in the same direction, and the state shown in FIG. 5 (B) is obtained. Next, when the moving direction of the actuating frame 30 is changed to the opposite direction, that is, to the right, the cord 33 acts equally with the cord 34, and the bending cloth tension frame 9 immediately moves in the opposite direction. Rotate. In this case, since there is no slack in both cords 33, 34, the bending cloth tension frame 9 accurately reciprocally rotates in response to the left and right reciprocating movement of the operating frame 30. Therefore, an accurate embroidery pattern is drawn.

Next, FIGS. 8 to 10 show another example of the structure of the fastening portion of the cord pair with respect to the actuation frame. An example in which the cord body can be easily stretched without loosening It is shown. In the figure, 41 is a guide groove formed in the left-right direction of the actuating frame 30c. 42 is a guide frame, which is a stop plate on the front and back sides
It is fixed to the actuating frame 30e by 43, 43 and set screws 44, 45, and has a guide groove 46 similar to the above. A mover 47 has guide pieces 48 and 49 which fit into the grooves 41 and 46. 50
Is a support piece attached to the actuating frame 30e, 51 is a connecting piece attached to the mover 47, 52 is a tightening screw rod that is rotatably inserted in the supporting piece 50, and its screw portion is a screw hole of the connecting piece 51. It is screwed to. 53 is a fixing nut.

In the case of the above configuration, the upper end of the cord 34e is attached to the mover 4
After being fixed to 7, the screw rod 52 is rotated to move the mover 47 in the direction of the arrow in FIG. 9, whereby the cord 34e can be tensioned. In this state, the nut 53 may be tightened to prevent the above state from loosening.

In addition, the parts that are considered to be the same or equivalent in structure to those in the previous figure in terms of function are denoted by the same reference numerals as those in the previous figure and have the letter e.
And redundant description is omitted.

(Effects of the Invention) As described above, according to the present invention, when the actuating frame 30 moves to the left, right, front and back in the plane parallel to the tube center of the bending cloth tension frame 9, Even if the connecting member between them is only a cord body, there is a feature that the bending cloth tension frame 9 can be rotated back and forth and left and right, and it is fitted to the actuation frame 30 for driving in the forward and backward direction like the conventional product. There is an epoch-making effect that a simple structure can be obtained at low cost without requiring an extra structure such as providing a groove.

For that reason, the mounting work of covering the fitting flange of the curved cloth tension frame with the fitting groove on the operation frame side as in the past,
Further, there is no need for pulling the cord at the same time as this work, and there is an effect that even an unskilled person can simply perform work such as maintenance and inspection by adjusting pulling of the cord.

Moreover, if the fitting groove and the fitting brim are not fitted together, the string can be directly viewed from the outside, which has the effect of facilitating inspection.

[Brief description of drawings]

The drawings show an embodiment of the present application. FIG. 1 is a perspective view showing the entire embroidery sewing machine, FIG. 2 is a partially cutaway perspective view showing a bending cloth tension frame and its driving portion, and FIG. III line sectional view, FIG. 4 is an IV-IV line sectional view, FIG. 5 (A), (B) is a VV line sectional view for explaining the operating state, FIG. 6 (A),
(B) is a plan view for explaining an operating state, FIG. 7 is a perspective view of a cord body, FIG. 8 is a perspective view showing another example of the structure of the fastening portion of the cord body with respect to the operating frame, and FIG. The figure is a cross-sectional view taken along line IX-IX, No. 10.
The figure is a sectional view taken along line XX. 1 ... machine frame, 9 ... bent cloth tension frame, 30 ... operating frame, 33, 34 ...
… String.

Claims (1)

(57) [Claims] 1. A curved cloth tension having a tubular shape and a cloth tension portion on a part of its peripheral surface while arranging the operation frame freely in the front-back and left-right directions with respect to the machine frame. The frame is freely movable in the direction of the cylinder center parallel to the moving surface of the working frame, and the reciprocating rotation of the cloth tension portion centering on the cylinder center is provided. In the drive section of the music cloth tension frame for an embroidery sewing machine, which allows the music cloth tension frame to be rotated and moved back and forth, the drive parts are directed toward the peripheral surface of the music cloth tension frame from both sides of the operation frame. And the ends of the cords are attached to the peripheral surfaces of the curved cloth tension frame that are beyond the cylinder center position of the curved cloth tension frame, and the working frame is parallel to the cylinder center. When moving to the left and right inside, the above-mentioned curved cloth tension frame follows the left and right rotation directions via the cord body, and is attached to the peripheral surface of the above mentioned curved cloth tension frame. By fixing a part of the cord body to a part of the curved cloth tension frame and moving the operating frame back and forth in a plane parallel to the cylinder center, the curved cloth tension frame is passed through the cord body. A drive unit for a curved cloth tension frame for an embroidery sewing machine, which is configured to follow the forward and backward movement directions.