JP3206260U - Plastic barbed - Google Patents

Abstract

An object of the present invention is to provide a plastic barbed that does not loosen one end of a string and that can fix a string in a process common to a metal barbed. A fixing portion 22 that fixes one end of a cord 12 and an extension portion 24 that is continuously integrated with the fixing portion 22 and extends in the other end direction of the cord 12 is provided. The fixing portion 22 is provided with two ribs 20. These ribs 20 are fixed by sandwiching one end of the string 12 between an anti-slip surface 14 having a protrusion 16 and a pinching surface 18. The extension portion 24 is provided with a slit 28 for bending the other end of the string 12 pulled out from the fixing portion 22 at the boundary between the fixing portion 22 and the extension portion 24 and pulling it out to the back side of the fixing portion 22. Since the force pulling the string 12 from the back side of the fixing part 22 does not force the rib 20 to spread, the end of the string 12 can be firmly fixed. [Selection] Figure 1

Description

  The present invention relates to a plastic barbed used for fixing or hanging an object using rubber or a string.

  For example, accessories, fountain pens, and the like are positioned and fixed with rubber strings in the case. Metal fittings are attached to both ends of the rubber cord so that the tip of the cord is exactly T-shaped. The metal fitting is inserted into a portion that cannot be seen from the outside, and is fixed so that the rubber string does not come off.

  This is called barbed, and is used for fixing various products, advertising, hanging POPs, and the like. A specific structure will be described later with reference to FIG. This structure has a long history of use, and it has been used almost as it is. . Recently, a T-shaped part and a string part integrally molded with plastic are often used to hold, connect, and suspend products (Patent Document 1) (Patent Document 2).

JP2013-109121A JP 2000-62831 A

  Since the metal fittings fixed to both ends of the string are almost invisible from the outside and can be manufactured at low cost, there is almost no need for improvement. However, it is not suitable for fixing products that dislike rust. Moreover, although the package of goods is discarded after being purchased, there is a problem that non-combustible materials are mixed with the waste as it is. Also, when used for a paper bag handle or the like, a colorful plastic is preferred because the metal part is exposed to the outside. Therefore, what fixed the plastic board shape | molded by the T shape at the both ends of a strong string is marketed.

  However, in order to fix a plastic T-shaped terminal to both ends of the string, it is necessary to perform resin molding processing on both ends of the string using a mold. This requires large equipment. Can only be used for expensive products. Metal fittings that have been used for many barbeds can be pressed with simple hand tools and fixed to both ends of the string. Even if the string has various lengths and thicknesses, it can be attached by the same operation using the same hand tool, so it is suitable for mass production at low cost.

  The inventors of the present invention tried to form by using the same shape as a conventional metal fitting made of plastic as it is and pressing it with the same hand tool. Molding was possible. It was found that if it was bent sufficiently, there was little return due to repulsive force. If this can be put into practical use, it can also be used in parts where the use of metal fittings has not been preferred. Moreover, it can be provided at a low cost. However, unlike metal ones, it has been found that the force to hold the end of the string is weak and the string can be easily detached as will be described later. This is not practical. The present invention has been made to solve the above problems.

  The following configurations are means for solving the above-described problems.

<Configuration 1>
A fixing part that fixes one end of the string and an extension part that is continuously integrated with the fixing part and extends in the other end direction of the string;
The fixing portion is provided with a rib for fixing one end of the string between the anti-slip surface and the pressing surface,
A plastic barb provided with a slit for bending the other end of the string pulled out from the fixed part at the boundary between the fixed part and the extended part and pulling it out to the back side of the fixed part. De.

<Configuration 2>
2. The plastic barbed structure according to Configuration 1, wherein the rib can press the clamping surface against the string only by plastic deformation by pressurization without using heat and an adhesive.

<Configuration 3>
The slit is provided with a drawing hole having an inner diameter substantially equal to the outer diameter of the string at a portion closest to the fixing portion of the slit, and the slit is set to be narrower than the outer diameter of the string. The plastic barbed according to 1 or 2.

<Configuration 4>
The plastic barbed according to Configuration 1 or 2, wherein the slit is provided with a protrusion that makes a width of a part of the slit narrower than an outer diameter of the string.

<Effect of Configuration 1>
Since the other end of the string pulled out from the fixed part is bent at the boundary between the fixed part and the extended part and pulled out to the back side of the fixed part, the force applied to the string does not act to push the rib open, One end is not loosened.
<Effect of Configuration 2>
Since the ribs are plastically deformed by pressurization without using heat or an adhesive, the string can be fixed in the same process as the metal barbed.
<Effect of Configuration 3>
The string can be bent at a right angle at the portion closest to the fixed portion of the slit and pulled out to the back side of the fixed portion to maintain its shape.
<Effect of Configuration 4>
After the string is pulled out to the back side of the fixed part, the string can be prevented from passing back through the slit.

(A) is a perspective view of the barbed terminal 10 of the present invention, (b) is a plan view, (c) is a left side view, (d) is a right side view, and (e) is a front view. (A) is a partial longitudinal sectional view showing a state after molding with the string fixed to the barbed terminal 10, (b) is a left side view after shaping, and (d) is fixing the barbed terminal 10 to both ends of the string 12. Shows the state. (A) is a perspective view of the metal barbed terminal 32, (b) is a left side view before the molding, (c) is a left side view after the molding, (d) is a perspective view of the preparation state for use, (e) ) Is a side view of the state of use of the present invention, (f) is a side view of an unfinished state of the barbed terminal 10 of the present invention, and (g) is a side view of a state of normal use of the barbed terminal 10 of the present invention. It is.

  Hereinafter, embodiments of the present invention will be described in detail for each example.

  1A is a perspective view of a barbed terminal 10 used in the plastic barbed of the present invention, FIG. 1B is a plan view, FIG. 1C is a left side view, FIG. 1D is a right side view, and FIG. It is a front view. 2A is a partial longitudinal sectional view showing a state after the string is fixed to the barbed terminal 10, FIG. 2B is a left side view after shaping, and FIG. 2D is a perspective view of the entire plastic barbed. In the figure, a state where the barbed terminals 10 are fixed to both ends of the string 12 is shown. Examples will be described with reference to these drawings.

  As shown in FIG. 1A, the barbed terminal 10 used in the plastic barbed of the present invention is fixedly integrated with a fixing portion 22 sandwiching one end of the string 12, and the fixing part 22 is continuously integrated. And an extension 24 extending in the other end direction. This can be produced, for example, by molding an ABS resin. Other materials can be used as long as they are plastic and have some strength but are also plastic.

  Various materials such as those obtained by combining rubber and synthetic fibers are used for the string. A string having a diameter of about 1 mm to 3 mm is often used. The total length of the barbed terminal 10 is 1 cm to several cm. Larger sizes can be manufactured depending on the application.

  As shown in FIGS. 1B and 1C, the anti-slip surface 14 of the fixing portion 22 of the barbed terminal 10 is provided with a protrusion 16 that pierces the string 12 and prevents the string 12 from slipping. The shape and number of the protrusions are arbitrary, but are selected according to the strength of the string so as to withstand the force with which the string 12 is pulled in the direction of the extension 24.

  As shown in FIG. 1B and FIG. 2A, the extension portion 24 has the other end of the string 12 pulled out from the fixing portion 22 in the direction of the extension portion 24, and the fixing portion 22 and the extension portion 24. A slit 28 is provided to be bent at the boundary and pulled out to the back side of the fixing portion 22. In addition, the back side of the fixing | fixed part 22 and the extension part 24 is made into the flat surface 30 as a whole.

  As shown in FIGS. 2 (a) and 2 (b), one end of the string 12 is fixed by being sandwiched between the anti-slip surface 14 and the pressing surface 18 of the rib 20 (FIG. 1 (a)). The rib 20 is molded by plastic deformation. The rib 20 is bent by a hand press (not shown) used for molding a conventional metal barbed terminal which will be described later with reference to FIG. 3, and is simply processed into the state shown in FIG. Since it does not heat or use an adhesive, it can be easily processed at low cost. Moreover, since it can work with the same hand tool, it is possible to mix metal and plastic ones on the production line.

  The plastic barbed of this invention is implement | achieved by fixing the barbed terminal 10 to the both ends of the strings 12, such as rubber | gum, for example, as shown in FIG.2 (c). For example, when used for hanging a product or pop, the flat surface 30 is brought into close contact with the back surface of the hole through the barbed terminal 10 as will be described later with reference to FIG. Since the other end of the string 12 pulled out from the fixing part 22 is bent at the boundary between the fixing part 22 and the extension part 24 and pulled out to the back side of the fixing part 22, the force applied to the string 12 pushes the rib 20 open. The end of the string 12 is not loosened.

  When shipped as shown in FIG. 1C, the string 12 may pass through the slit 28. For this purpose, as shown in FIG. 1 (b), a lead-out hole 26 having an inner diameter substantially equal to the outer diameter of the string 12 is provided in the portion closest to the fixing portion 22 of the slit 28. The inner diameter of the extraction hole 26 is selected to be substantially equal to the outer diameter of the string 12. On the other hand, the width of the slit 28 is selected to be narrower than the outer diameter of the string 12. Thereby, when the string 12 is fitted into the drawer hole 26 through the slit 28, the state of FIG.

  Further, for example, as shown in FIG. 2 (d), the slit 28 is provided with a stopper 42 that makes the width of a part of the slit 28 narrower than the outer diameter of the string 12. This shape and width are arbitrary. After the string 12 is pulled out to the back side of the fixing portion 22 through the slit 28, the string 12 may have a shape that does not return to the original position through the slit 28.

  3A and 3B are drawings for comparing the conventional metal barbed terminal 32 and the barbed terminal 10 of the present invention. FIG. 3A is a perspective view of the metal barbed terminal 32, and FIG. 3B is a left side view before molding. (c) is a left side view after the molding, (d) is a perspective view of the use ready state, and (e) is a side view of the use state. FIG. 3 (f) is a side view for explaining a problem in an unfinished state of the barbed terminal 10 of the present invention, and FIG. 3 (g) is a side view of a normal use state of the barbed terminal 10 of the present invention.

  The conventional metal barbed terminal 32 has a shape as shown in FIG. As shown in FIG. 3B, the string 12 is prevented from slipping by the projection 36, and the side plate 34 is pressed by a hand press, and the state shown in FIG. 3C is obtained. As shown in FIG. 3D, the string 12 and the metal barbed terminal 32 are formed in a T shape from the support hole 40 of the support object 38 through the metal barbed terminal 32 so as not to come out of the support hole 40. . When in use, the state shown in FIG. Thus, the support object 38 can be suspended using the string 12. Moreover, a fountain pen and accessories can be fixed using the rubber string 12 for the support target object 38, for example.

  Here, a problem will be described in the case where the material is made of plastic with the same shape as the metal barbed terminal 32 and the pressing is performed in exactly the same manner. When the rib 12 of the barbed terminal 10 is pressed and the string 12 is fixed and used, tension in the direction of the arrow is applied to the string 12 as shown in FIG. This tension exerts a force that pushes and opens the rib 20. It has been found that the plastic material that has been subjected to plastic deformation cannot withstand such a force, and as shown in FIG.

  On the other hand, in the barbed terminal 10 of the present invention, as already described, the string 12 is pulled out to the back side of the barbed terminal 10 through the slit 28. Therefore, as shown in FIG. 3G, the back side flat surface 30 of the barbed terminal 10 is in close contact with the surface around the support hole 40 of the support object 38. Even if tension in the direction of the arrow is applied to the string 12, a force that pushes the rib 20 is not applied, so that the string 12 does not come off. Moreover, the flat surface 30 of the barbed terminal 10 stabilizes the posture of the barbed terminal 10. The difference is clear when compared with the case of FIG.

  According to the experiment, when a barbed terminal 10 having a length of 20 mm was fixed to both ends of a string 12 having a diameter of 1 mm and a weight having a weight of 3.5 kg was suspended, there was no change even after 60 days had passed. Plastic is plastically deformed with a smaller force than metal and easily returns. However, the strength of the barbed terminal 10 is drastically improved when the posture is stabilized and no force other than the direction of the arrow is applied as in the present invention. Therefore, it has become possible to utilize in various fields such as fixing of products in the package and hanging of advertisements and POPs.

  In the embodiment described above, one end of the barbed terminal 10 is sharpened so that a hole can be formed at the pointed end even if the object has no hole. This has been used in the past. However, if the object has a hole, a sharp portion is unnecessary. Further, the present invention can be applied to a large object and a small object. That is, as a whole, the shape of the barbed terminal 10 may be wide or long. It can be colored or patterned because it is made of plastic. Since plastic can be assembled simply by plastic deformation with a press, expensive equipment is unnecessary and mass production is possible at low cost.

DESCRIPTION OF SYMBOLS 10 Barbed terminal 12 String 14 Anti-slip surface 16 Protrusion 18 Clamping surface 20 Rib 22 Fixing part 24 Extension part 26 Pull-out hole 28 Slit 30 Flat surface 32 Metal barbed terminal 34 Side plate 36 Protrusion 38 Support object 40 Support hole 42 Stopper

Claims (4)

A fixing part that fixes one end of the string and an extension part that is continuously integrated with the fixing part and extends in the other end direction of the string;
The fixing portion is provided with a rib for fixing one end of the string between the anti-slip surface and the pressing surface,
A plastic barb provided with a slit for bending the other end of the string pulled out from the fixed part at the boundary between the fixed part and the extended part and pulling it out to the back side of the fixed part. De.   2. The plastic barbed according to claim 1, wherein the rib can press the clamping surface against the string only by plastic deformation by pressurization without using heat and an adhesive. 3.   The portion of the slit closest to the fixed portion is provided with a lead-out hole having an inner diameter substantially equal to the outer diameter of the string, and the slit is set to have a width narrower than the outer diameter of the string. Item 3. A plastic barb according to item 1 or 2.   The plastic barbed according to claim 1 or 2, wherein the slit is provided with a protrusion that makes a width of a part of the slit narrower than an outer diameter of the string.

Images