JPH0410235Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a stitch and row number mark ring used as a mark for the number of stitches and rows of a knitted fabric during knitting work.

[Conventional technology]

When increasing or decreasing the number of stitches or rows of knitted fabric during knitting work, or when changing the knitting method for each predetermined number of rows or stitches during pattern knitting, to make it easy to count the number of stitches and rows and to prevent mistakes in counting. For this purpose, a method is often used to mark the starting position of the knitted fabric using a stitch and row number marking ring. Conventionally used stitch and row number marking rings are generally constructed by opening a part of the ring body in the form of a slit to provide a knitting yarn insertion part that communicates the inner and outer circumferences. It is true. The stitch number and row number mark ring is fixed at a predetermined position of the knitted fabric by introducing the knitting yarn of the knitted fabric into the ring from the knitting yarn insertion portion, and serves as a mark for knitting work.

[Problem that the idea aims to solve]

However, in the case of the above-mentioned conventional stitch number and row number marking ring, the knitting yarn can be locked in a predetermined position on the knitted fabric by simply inserting the knitting yarn into the ring from the knitting yarn insertion part, and its attachment and removal are easy. On the other hand, since the knitting thread insertion part is always open, if you interrupt knitting and fold the knitting process with the stitch number and row number marking ring attached to the knitted fabric, the stitch number and row number marking ring will be removed from the knitted fabric. The drawback is that it comes off easily. If the stitch and row number marking rings come off from the knitted fabric, the number of stitches and rows must be counted again from the beginning when knitting work is restarted, resulting in a problem that work efficiency decreases. . In order to solve the above problem, it is conceivable to make the insertion distance of the knitting yarn insertion part as small as possible, but it is necessary to provide an opening of a certain size or more for convenience in manufacturing the mold. In addition, a stitch number/row marking ring has been proposed in which an opening closing piece for closing the opening of the knitting yarn insertion part is lockable to the ring body, but although it is possible to prevent it from falling off from the knitted fabric, The opening closing piece must be manipulated when attaching and detaching, making handling extremely troublesome and reducing work efficiency. The present invention solves the above-mentioned conventional problems, and is easy to attach and detach from knitted fabrics.Once attached to knitted fabrics, the invention has an easy-to-use stitch count that is configured so that it will not come off inadvertently. The objective is to provide a stage number marking ring.

[Means to solve the problem]

In order to solve the above problems, the invention of the present application takes the following technical measures. In other words, the present invention is a ring for marking the number of stitches and stages, in which a knitting yarn insertion part communicating from the inner circumference to the outer circumference of the ring is formed in an appropriate part of a resin-molded ring body. A part having a cross-sectional shape in which the centroid is shifted from the center between the inner and outer peripheries of the ring body toward the inner periphery is formed in part or all of the ring body, and the part is contracted after resin molding. It is characterized in that the diameter of the ring body is reduced so that the insertion distance of the knitting yarn insertion part is reduced.

[Functions and effects of the idea]

The present invention utilizes the shrinkage phenomenon of the resin after resin molding to make the insertion distance of the knitting yarn insertion portion provided in the ring body much smaller than that of the conventional one. Conventionally, when molding a stitch number and stage number mark ring, it was necessary to secure an opening of a predetermined size or more in the knitting yarn insertion portion in order to ensure mold strength and the number of shots. For this reason, the insertion of the knitting yarn insertion part
A problem arose in that the gap became larger than necessary and the ring body easily came off from the knitted fabric. In the present invention, the cross-sectional shape of the ring body is such that its centroid is shifted from the center between the inner and outer peripheries of the ring body toward the inner periphery. In this method, the inner circumferential side of the ring body undergoes a larger contraction than the outer circumferential side, and the diameter of the ring body is reduced to reduce the insertion distance of the knitting yarn insertion portion. Usually, in injection molding, the resin shrinks during the cooling process after molding due to the high injection temperature of the resin into the mold. Conventionally, the shrinkage phenomenon causes dimensional and shape errors in products, so the shape of products has been determined to avoid shrinkage. In general, thicker parts have a larger amount of shrinkage than thinner parts because the amount of resin is large and it takes time for the inside to cool down. In addition, thermoplastic resins are often used in injection molded products such as the one invented in this application, but when crystalline resins such as polyacetal resin are used, the temperature of thick parts decreases after injection molding. The time is longer than that for thin-walled portions, and therefore crystallization of the resin is promoted and the amount of shrinkage is greater than that for thin-walled portions. The present invention focuses on the above-mentioned phenomenon, and in the cross section of the ring body, a portion having a cross-sectional shape whose centroid is shifted from the center between the inner circumference and the outer circumference of the ring body toward the inner circumference side. Formed on part or all of the ring body. As a result, the cross-sectional area on the inner circumference side of the ring body becomes larger than that on the outer circumference side, so
The amount of resin on the inner circumference side increases, and as a result, the cooling rate of the inner circumference after resin molding decreases.
As a result, the amount of contraction of the inner circumferential portion becomes larger than that of the outer circumferential portion, and the ring body contracts to reduce its diameter. By reducing the diameter of the ring body, the insertion distance of the knitting yarn insertion portion is reduced, making it possible to form a knitting yarn insertion portion that is much smaller than the insertion distance that can be set with normal resin molding. . Further, by further increasing the amount of diameter reduction of the ring body, it is possible to eliminate the gap and bring the open ends of the ring bodies forming the knitting yarn insertion portion into contact with each other. Since the insertion distance of the knitting yarn insertion part becomes small, after the knitting yarn is inserted through the knitting yarn insertion part and the stitch number and row number mark ring is locked at a predetermined position of the knitted fabric, the knitting yarn of the ring body is In order for the knitting yarn to pass through the insertion portion toward the outside of the ring body, a force must be applied to open the insertion gap against the elasticity of the ring body. Therefore, even if the knitting operation is interrupted and the knitted fabric is folded, the stitch number and row number marking rings will not easily come off from the knitted fabric. In addition, in order to attach or remove the stitch number and row number marking ring according to the present invention from a knitted fabric, the knitting yarn must pass through the knitting yarn insertion part against the elasticity of the ring body. Because of this, the elastic force of the ring body is very large, and it is also possible to set the desired elasticity depending on the cross-sectional shape of the ring body, so it can be handled in exactly the same way as a conventional ring for marking the number of stitches and stages. . Further, since the stitch number/stage number mark ring according to the present invention can be formed by the same manufacturing process as the conventional stitch/stage number mark ring, the manufacturing cost will not increase.

[Explanation of Examples]

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG. 1 is a plan view of an embodiment of the stitch number/stage number mark ring according to the present invention, and FIG. 2 is a sectional view taken along the line - in FIG. 1. As shown in FIG. 1, the stitch number and stage number marking ring 1 of this embodiment is formed by injection molding a thermoplastic crystalline resin such as polyacetal, and is made by bending a string-like member into an approximately arc shape. It is formed from a substantially annular ring body 2 with its both ends abutted. The ring body 2 has one end 3 formed in an arc shape, and the other end 4 extending linearly from the outer circumference of the ring body in a tangential direction thereof. The arcuate end portion 3 is in contact with the inner side of the arcuate end portion 4 . The contact portion is formed to be able to expand elastically easily, and forms a yarn insertion portion 7 through which the inner periphery 5 and outer periphery 6 of the ring body 2 communicate with each other to allow the knitting yarn to pass through. There is. The cross-section of the ring body 2 taken along a plane including the central axis of the circular arc portion is approximately oval-shaped as shown in FIG. It has a shape in which one outer circumference arc is arranged on the inner circumference 5 side of the ring body 2. FIG. 3 shows an enlarged view showing the above cross-sectional shape in detail. As shown in this figure, in this embodiment, the centroid G of the above-mentioned cross section is set to the symmetrical axis 8 of the above-mentioned cross section.
It is formed to have a cross-sectional shape that is deviated inward by a predetermined amount E from the midpoint between the innermost circumference 5a and the outermost circumference 6a of the ring body 2, that is, the center C between the innermost circumference 5a and the outermost circumference 6a of the ring body 2. By the way, as shown by the solid line in FIG. 1, it is impossible to create an injection mold that directly corresponds to the form of the stitch number and stage number marking ring that the knitting yarn insertion part 7 is in contact with. As represented by the imaginary line in FIG. 1, a mold corresponding to the open shape of the knitting yarn insertion portion 7 is adopted. For this reason, with conventional stitch and row number marking rings, it was only possible to manufacture stitch and row number marking rings that corresponded directly to the above-mentioned mold, that is, those in which the knitting yarn insertion section 7 was opened more than necessary. . The planar shape of the mold for molding the stitch number and stage number mark ring according to this embodiment also corresponds to the shape represented by the above-mentioned imaginary line. However, in this embodiment, as shown in FIG. By forming the inner circumference 5 of the ring body 2 into a shape deviated from
The amount of shrinkage on the side is made to be larger than the amount of shrinkage on the outer periphery 6 side, and in the cooling process after resin molding,
The ring body 2 can be contracted and deformed to reduce its diameter. As a result, the insertion gap 7a of the knitting yarn insertion part 7 corresponds directly to the mold.
decreases from b. Moreover, in this example, since polyacetal resin, which is a crystalline resin, is used as the material, in the cooling process after the injection molding,
Crystallization on the inner periphery 5 side, which is thicker and has a slower cooling rate, is promoted, and the amount of shrinkage thereof increases significantly. Therefore, the ring body 2 is contracted and deformed so as to reduce its diameter, and after cooling, it assumes a shape in which both sides of the knitting yarn insertion part 7 are in contact with each other, as shown by the solid line in FIG. Note that the abutting portions are formed so that they are only in contact and can easily expand elastically. When the gap 7a of the knitting yarn insertion part 7 is reduced to less than the thickness of the knitting yarn or disappears, the knitting yarn is passed through the knitting yarn insertion part 7 to connect the stitch number and row number mark ring 1. Even if the knitted fabric is folded after being stopped, in order for the knitting yarn to pass through the knitting yarn insertion part 7 of the ring body 2, a force must act in the direction in which the knitting yarn insertion part 7 expands. The stitch number and row number mark ring 1 does not easily come off from the knitted fabric. Further, in order to attach or remove the stitch number and row number marking ring 1 according to the present invention from the knitted fabric, the knitting yarn insertion portion 7 must be expanded against the elasticity of the ring body 2 to allow the knitting yarn to pass through. However, since the ring body 2 is molded from resin, the elastic force of the ring body 2 is not so large, and the desired elasticity can be set depending on the cross-sectional shape of the ring body 2. It is possible to manufacture a multi-stage mark ring that can be handled in exactly the same way as a mark ring. Furthermore, since it can be formed using the same manufacturing process as conventional stitch and row number marking rings, there is no increase in manufacturing costs, and it is easy to attach and remove from knitted fabrics. It is possible to provide an easy-to-use stitch number and stage number mark ring 1 that is configured so that it will not come off inadvertently once it is attached. FIGS. 4 and 5 show other embodiments of the present invention. In this embodiment, by forming a pair of arc-shaped recesses 10 along the outer periphery of the ring body 2 on the outer periphery 6 side of both side parts 9a and 9b of the ring body 2, in the cross section of the ring body 2, The center of gravity is shifted toward the inner circumference 5 from the center between the inner circumference 5 and the outer circumference 6 of the ring body. Further, the recessed portion 10
is formed in a part of the ring body 2, and in the part where the concave portion 10 is formed, the ring body 2 is contracted and deformed in a direction that reduces its radius of curvature, and the insertion gap 7a of the knitting yarn insertion portion 7 is It is formed so that it decreases in the cooling process after resin molding. The embodiments of the present invention are not limited to the above-described embodiments. In the embodiment, the insertion gap 7a of the knitting yarn insertion part 7 is reduced or eliminated, but it is further formed so that both sides forming the insertion gap 7a are elastically in contact with each other. You can also. Further, the cross-sectional shape of the ring body 2 is not limited to the shape of the embodiment, and other shapes can also be adopted. Further, other resin materials may be used as long as they shrink during the cooling process after molding.

[Brief explanation of the drawing]

Figure 1 is a plan view of an embodiment of the present invention;
The figure is a sectional view taken along the - line in Figure 1,
The drawings are an enlarged view of the main part of FIG. 2, FIG. 4 is a plan view of another embodiment, and FIG. 5 is a sectional view taken along the line - in FIG. 4. 1... Number of stitches and steps number mark ring, 2... Ring body,
5...Inner circumference, 6...Outer circumference, 7...Knitting yarn insertion part,
7a...Insertion = space, C...center, G...centroid.

Claims (1)

[Claims for Utility Model Registration] A ring for marking the number of stitches and rows, in which a knitting yarn insertion portion communicating from the inner circumference to the outer circumference of the ring is formed in an appropriate part of a resin-molded ring body, which in a cross section of the ring body , a part having a cross-sectional shape whose centroid is shifted from the center between the inner and outer peripheries of the ring body toward the inner periphery is formed in part or all of the ring body, and the shrinkage after resin molding A ring for marking the number of stitches and stages, characterized in that the diameter of the ring body is reduced so that the insertion distance of the knitting yarn insertion portion is reduced.