JPH0546991U - Needle plate of sewing machine for embroidery - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a needle plate of a sewing machine for embroidery with low noise. [Structure] A cloth 5 is arranged on an upper surface of a needle plate 4 having a needle hole 3, and a needle 2 through which an embroidery thread is passed is moved up and down in the needle hole 3 and a presser foot 6 is interlocked with an ascending movement of the needle 2. In the embroidery sewing machine in which the cloth 5 is pressed against the needle plate 4, the groove 9 extending inside and outside the needle plate 4 around the needle hole 3 in correspondence with the peripheral portions 7a and 7b of the presser foot 6 is provided. Was formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a needle plate for an embroidery sewing machine, and more particularly to a needle plate for an embroidery sewing machine that reduces noise when a descending presser foot comes into contact with the needle plate.

[0002]

[Prior Art]

 In an embroidery sewing machine, a plurality of appropriately selected needles and a presser foot for pressing the material in conjunction with these needles are attached on the same circumference of the rotatable head, and each needle has a different color. The embroidery thread of is inserted. On the other hand, a needle plate having a needle hole is arranged below the head, and the presser foot for pressing the needle and the cloth moves up and down with respect to the needle plate. When embroidering, a cloth is put on a top plate configured to be movable in the front, rear, left and right, and the cloth is arranged on the needle plate. The head is rotated to move a needle of an appropriate embroidery thread onto the needle hole of the needle plate, move the needle up and down in the needle hole, and move the cloth (top plate) according to the pattern. In addition, the presser foot is lowered in conjunction with the time when the needle rises to press the cloth under pressure to prevent the cloth from hanging or skipping.

[0003]

[Problems to be solved by the device]

 Since the vertical movement of the needle described above reaches 700 to 800 times per minute, the presser foot also moves up and down 700 to 800 times. Therefore, at the end of the descent, the presser foot comes into contact with the needle plate through the material at a high speed, and there is a problem that noise at that time is large. In particular, when the presser foot and the needle plate are relatively inclined (in most cases, there is some inclination), the peripheral edge of the presser foot protrudes below the needle stroke (see Fig. 4). Due to the dimensions A) shown, the noise is even louder. The present invention has been made in view of the above circumstances, and an object thereof is to provide a needle plate of a sewing machine for noise reduction with low noise.

[0004]

[Means for Solving the Problems]

 The needle plate 4 of the sewing machine for embroidery of the present invention will be described with reference to the reference numerals used in the embodiments. The cloth 5 is arranged on the upper surface of the needle plate 4 having the needle holes 3, and the needle 2 through which the embroidery thread is passed is used. In the embroidery sewing machine in which the material 5 is pressed against the needle plate 4 by the presser foot 6 in conjunction with the upward movement of the needle 2 while moving up and down in the needle hole 3, the upper surface of the needle plate 4 and the needle hole 3 It is characterized in that a groove portion 9 is formed around the periphery of the presser foot 6 so as to correspond to the peripheral edge portions 7a and 7b of the presser foot 6, and to extend inside and outside thereof.

[0005]

[Action]

 In the needle plate 4 of the sewing machine for embroidery of the present invention, when the presser foot 6 descends, the central portion of the presser foot 6 presses the material 5 around the needle hole 3, and the peripheral edge portions 7a and 7b of the presser foot 6 have groove portions. Since it enters the inside 9 and does not contact the throat plate 4, noise is reduced.

That is, in the embroidery sewing machine, as shown in FIG. 1, the needle 2 in which the embroidery thread is sewn on the cloth 5 moves upward from the state shown by the dotted line in FIG. 1 to the state shown by the solid line. At this time, as shown in FIGS. 2 and 3, the pressing plate 7 integral with the presser foot 6 presses the material 5 onto the needle plate 4. At this time, the peripheral portions 7a and 7b of the pressing plate 7 are pushed into the groove 9 formed on the needle plate 4 side while pushing the cloth 5 as shown in FIG. The pressing plate 7 or the peripheral portions 7a and 7b thereof which have been formed do not directly contact the needle plate 4. Therefore, the generation of abnormal noise is drastically reduced.

In particular, in the conventional embroidery sewing machine, although not through the cloth 5, any of the peripheral edges 7 a and 7 b of the pressing plate 7 comes into contact with the needle plate 4 to generate abnormal noise. However, in the present invention, any one of the peripheral edges 7a, 7b of the pressing plate 7 which has descended earlier enters the groove 9 of the needle plate 4 through the cloth 5, so that the generation of abnormal noise is suppressed as much as possible. You can get it. Although the thickness of the cloth 5 varies depending on the product, this thickness change is absorbed and adjusted by part of the cloth 5 entering the groove 9 during embroidery. It is not necessary to adjust the pressing force of the presser foot 6 according to the change in the thickness of the. That is, since a part of the cloth 5 enters the groove 9 together with the peripheral edge portion 7a or 7b of the pressing plate 7, in the embroidery machine using the needle plate 4 of the present invention, the thickness of the cloth 5 is reduced. Not only is the skipping of eyes caused by the change in height prevented, but the occurrence of abnormal noise is also prevented.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. The head 1 of the sewing machine for embroidery is configured to be rotatable, and a plurality of needles 2 (only one is shown) are attached on the same circumference, and each needle 2 has an embroidery thread of a different color (not shown). Has been inserted. On the other hand, a needle plate 4 having a needle hole 3 is arranged below the head 1, and the needle 2 moves vertically in the needle hole 3 700 to 800 times per minute. The head 1 is rotated by a control device (not shown) to move a designated needle 2 above the needle hole 3 in accordance with the color to be embroidered.

The cloth 5 is attached to an upper surface of a top plate (not shown) in a tensioned state, is arranged on the upper surface of the needle plate 4, and is moved back and forth and left and right in accordance with a pattern to be embroidered. The presser foot 6 has an L shape and is configured to be movable up and down. A circular pressing plate 7 at the lower end is formed with an insertion hole 8 through which the needle 2 is inserted. The groove 9 is formed on the upper surface of the needle plate 3 and around the needle hole 2 inside and outside the peripheral portions 7a and 7b of the pressing plate 7, and when the presser foot 6 abuts on the needle plate 3, the presser foot 6 is Peripheral portions 7a and 7b of the pressing plate 7 correspond to the central portion of the groove portion 9.

Next, the process of embroidering will be described. (1) First, the cloth 5 is attached to a top plate (not shown) in a tensioned state, and the cloth 5 is placed on the needle plate 4. Next, the head 1 is rotated to move the needle 2 having the embroidery thread of a desired color onto the needle hole 3 of the needle plate 4. In this case, the pressing plate 7 of the presser foot 6 is separated from the cloth 5 (see FIG. 2). Move the top plate and position the dough 5. (2) Then, the head 1 is operated to lower the needle 2 into the needle hole 3. When the needle 2 reaches the bottom dead center, the presser foot 6 is lowered by a control device (not shown), and the pressing plate 7 presses the raw material 5 against the needle plate 3 (see FIG. 3). Then, the needle 2 rises and returns to the initial state. (3) After that, the steps (1) and (2) are repeated.

According to the present invention, the following effects can be obtained. That is, a, since the center portion of the pressing plate 7 of the presser foot 6 contacts the needle plate 4, noise can be reduced. For example, even if the pressing plate 7 of the presser foot 6 is inclined as shown in FIG. 4, when the central portion of the pressing plate 7 abuts the needle plate 4, the peripheral edge portion 7a or 7b thereof is located inside the groove portion 9. It does not come in contact with the throat plate 4 and the protrusion amount A due to the inclination does not cause noise. b. When the needle 2 rises, the cloth 5 is pressed around the needle hole 3, so that the cloth is firmly fixed, and the stitch skip of the embroidery thread can be reliably prevented. c. Since the fabrics 5 located on both sides of the needle hole 3 are accommodated in the groove portion 9, the levelness of the fabric 5 is surely maintained, thick or thin fabrics can be embroidered, and the finish is beautiful.

[0012]

[Effect of the device]

 In the needle plate of the sewing machine for embroidery of the present invention, the cloth is arranged on the upper surface of the needle plate having the needle hole, and the needle passing the embroidery thread is moved up and down in the needle hole and is interlocked with the upward movement of the needle. In the sewing machine for embroidery in which the material is pressed against the needle plate by a presser foot, the inner surface and the outer surface of the needle plate are covered around the needle hole and around the needle hole. Since the groove is formed, when the presser foot descends, the center of the presser presses the material around the needle hole and the peripheral edge of the presser does not enter the groove and contact the needle plate. As a result, noise can be reduced and the occurrence of skips in the embroidery thread can be prevented.

[Brief description of drawings]

FIG. 1 is a front view of a main part of an embroidery sewing machine.

FIG. 2 is a cross-sectional view showing the relationship between the presser foot, the cloth and the needle plate during embroidery.

FIG. 3 is a sectional view corresponding to FIG. 2 when the needle is raised.

FIG. 4 is an enlarged cross-sectional view for explaining a state in which the presser foot is inclined.

[Explanation of symbols]

 2 needles 3 needle holes 4 needle plate 5 cloth 6 presser foot 7 pressing plates 7a, 7b peripheral portion 9 groove portion

Claims (1)

[Scope of utility model registration request] 1. A fabric is arranged on an upper surface of a needle plate having a needle hole, a needle through which an embroidery thread is passed is moved up and down in the needle hole, and the fabric is pressed by a presser foot in conjunction with a rising motion of the needle. In the embroidery sewing machine that is brought into pressure contact with the needle plate, a groove portion is formed on the upper surface of the needle plate and around the needle hole, the groove portion extending inside and outside corresponding to the peripheral portion of the presser foot. Needle plate of sewing machine for embroidery.