1. Field of the Invention
The present invention relates generally to an attachment member and more particularly, to an attachment member used for hanging a tag on a commodity or fastening or binding something. The present invention also relates to methods for manufacturing such attachment members.
2. Description of the Related Art
Attachment members for hanging a tag on a commodity or fastening or binding something are known. Typically, such an attachment member is formed using a reinforced fiber material obtained by performing a drawing process on a plastic. However, formed in such a manner, the attachment member cannot be easily cut when attached to the commodity.
The attachment members usually include a receiving section and an insertion section that is fitted into the receiving section. Both the receiving and insertion sections are integrally formed as part of the attachment member at respective ends thereof. The receiving and insertion sections are molded primarily from polypropylene, and they are connected together to cause the attachment member to assume the form of a loop.
A disadvantage of prior art attachment members is that since the fiber used to form such a prior art attachment member is not expandable, a number of attachment members must be produced, each with a different size, to enable use of the attachment members for various size commodities. As a result, these prior art attachment members are unsuitable for most purposes other than hanging a tag and fastening or binding something, and are unsuitable for wrapping an object around another object, for example.
Instead of a non-expandable fiber, it has been considered to use an expandable rubber material composition. However, most rubber materials are vulnerable to deterioration upon aging and exposure to exterior atmospheric conditions and are thus unable to be used for long periods of time. Another drawback of the use of rubber material to connect the receiving and insertion sections of an attachment member is that when the receiving and inserting sections are made of polypropylene, the polypropylene receiving and inserting sections and the rubber material do not allow a strong coupling force to be established that is sufficiently resistant to shock or application of a force. Therefore, the receiving and inserting sections may separate from the rubber connecting member.
Exemplifying attachment members used for hanging a tag on a commodity or fastening or binding something are disclosed in JP-A-7-279018.
A general embodiment of an attachment member in accordance with the invention includes an elongate member molded from an elastomer and having a rigid or hard fixing element at one or both ends thereof. The elongate member may be a linear or substantially linear member having a substantially circular cross-section. The fixing element may be a two-part fixing element including a receiving section having an engaging portion at one end of the elongate member, and an insertion section at another end of the elongate member. The insertion section includes an engagement portion which is configured to be fitted at least partially into and/or through the receiving section and more particularly, to engage with the engaging portion of the receiving section. The fixing element at both ends of the elongate member may be provided in the form of an assembly by further combining it with a respective runner member that is connected to each of the receiving section and the insertion section.
An additional and optional feature of an attachment member in accordance with the invention is a hook portion integral with part of the receiving section. Further, the elongate member may be in the form of a strip, and the fixing element may be in the form of a clip portion. Alternatively, the elongate member may be in the form of a strip, and the fixing element may be provided as an element configured for binding purpose, i.e., including a receiving section which has an engaging portion at one end of the elongate member and engagement portions on one surface of the elongate member at another end thereof, the engagement portions of the elongate member being formed at substantially constant intervals to be engaged with the engaging portion of the receiving section.
A first embodiment of a method for manufacturing an attachment member in accordance with the invention includes extrusion-molding an elongate member from elastomeric material, e.g., an elastomer, and inserting the elongate member into a rigid or hard fixing element. The attachment member may also be obtained by preparing an elongate member from an elastomer using, for example, injection molding and attaching a rigid or hard fixing element to an end of the elongate member after cutting the member into appropriate or desired dimensions, e.g., a desired length.
The manufacturing method therefore provides an attachment member as described above, i.e., one including an elongate member molded from an elastomer and that has a rigid or hard fixing element at one or both ends thereof. The method may include molding the fixing element in advance and thereafter firmly coupling the elastomeric elongate member, which is molded in an appropriate manner, with the fixing element.
In some embodiments of the manufacturing method, the fixing element has a portion arranged on each end of the elongate member. One of the fixing element portions may be a receiving section having an engaging portion, and the other may be an insertion section having an engagement portion which is inserted at least partially into and/or through the receiving section to be engaged and locked with the engaging portion of the receiving section. Each of the fixing elements may have a coupling shaft configured to be accommodated in an end portion of the elongate member. Each coupling shaft may be formed with a groove into which the elastomer enters to achieve rigid integration of the attachment member and the respective fixing element.
The method for manufacturing an attachment member in accordance with the invention may be to form attachment members usable as rubber bands for hair.
The invention, together with further objects and advantages thereof, may best be understood by reference to the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements, and wherein:
Referring to the accompanying drawings wherein like reference numerals refer to the same or similar elements, an attachment member in accordance with the invention includes an elongate member 1. The elongate member 1 is preferably linear or substantially linear, molded from an elastomer and has a substantially circular cross-sectional shape. In one particularly suitable embodiment, the elongate member 1 has a diameter of about 1.2 mm and a length of about 5 cm to about 6 cm.
Referring specifically to the attachment member shown in
Referring now to
Referring now to
Insertion section 43 includes a hollow interior into which the end of the elongate member 1 is inserted (see
A stopper 44 is optionally formed as a part of the elongate member 1, continuously or integrally with the receiving section 42 by, for example, extrusion molding as described later. Stopper 44 is operative to prevent the receiving section 42 from separating from the elongate member 1.
Referring now to
Referring now to
Attachment member 60 also includes a reinforcing section 68 located inside the periphery of the opening of the bag to which the attachment is mounted. Two ribs 61b are formed on two respective surfaces of the elongate member 61a to extend in a longitudinal direction thereof such that the attachment member 60 can be provided with a comfortable feel of grip and improved strength (see
The elongate member 61a may be substantially linear, molded from an elastomer and have a cross-sectional shape as shown in
Referring now to
The attachment member 70 may preferably be used as a tying band for tying and fastening wire materials or the like.
Methods for manufacturing attachment members described above will now be described with reference to
In order to prevent the elongate member 1 from coming out the receiving section 2, a stopper 4, as in any of the embodiments described above, is arranged on a part of the elongate member 1, and the elongate member 1 is cut when the stopper 4 abuts an apex surface of a head portion 3a of the insertion section 3. Subsequently, the inserting operation is resumed with the stopper 4 serving as the leading edge. Thus, the stopper 4 is pressed forward into the receiving section 2 to prevent the elongate member 1 from coming off. A guide gate 11 may be provided to aid in the insertion of the elongate member 1 into the receiving section 2 (see
Another method for manufacturing any of the attachment members described above is a double molding method in which the receiving section and the insertion section are molded using, for example, a first die and are moved apart from each other, and the elongate member made of an elastomer is set between the receiving section and the insertion section. Then, parts of those elements in contact each other are attached together, e.g., fused together. The fusing is carried out by applying heat. When contact surfaces between the receiving section and elongate member and between the insertion section and the elongate element are constructed to be rough surfaces, fusing takes place over large surface areas, which allows rigid coupling between those elements.
Referring now to
A receiving section 22 serves as a fixing element molded from a hard material, which is preferably polypropylene, is firmly coupled to an end face of one of the large diameter parts, i.e., the large diameter part 21a. An insertion section 23, which is also molded from polypropylene, is firmly coupled to an end face of the other large diameter part, i.e., the large diameter part 21b.
The receiving section 22 and the insertion section 23 may be molded in advance using, for example, a die, and the receiving section 22 may be formed with a receiving hole at an end face thereof. The receiving hole has a cylindrical shape, and an engaging portion 22a is formed on the bottom end of the hole. The engaging portion 22a can be observed through a window hole 24 to check the state of engagement with the insertion section 23.
An insertion guide 23a having a spherical surface is formed at the tip of the insertion section 23 to guide insertion of the insertion section 23 into the receiving hole of the receiving section 22. A base end of the insertion guide 23a has a step portion which serves as a portion to be engaged with the engaging portion 22a of the receiving section 22. Further, a stopper 23c having a larger diameter than a diameter of the opening of the receiving hole is formed at the insertion section 23 to regulate the insertion length of the insertion section 23.
Coupling shafts 25 and 26 are integrally arranged at base ends of the receiving section 22 and the insertion section 23, respectively, or on the sides of the sections to be coupled with the elongate member 21. The coupling shafts 25 and 26 may be formed with grooves 25a and grooves 26a, respectively, and the grooves 25a, 26a extend substantially in the axial directions of the respective shafts 25, 26.
The coupling shafts 25 and 26 of the receiving section 22 and the insertion section 23 are set on the die used for molding the elongate member 21 from an elastomer, and the elastomer material is injected into the die after the shafts 25, 26 are set. At this step, the injected elastomer material is solidified into a structure in which the coupling shafts 25 and 26 are embedded, whereby the elastomer is integrally coupled with the receiving section 22 and the insertion section 23. At this time, the elastomer material enters and tightly fits with grooves 25a and 26a to make the integral coupling more rigid. The coupling shafts 25 and 26 thus serve as cores of parts which are held by fingers or the like when the attachment member 20 is used as a complete product. The coupling shafts 25, 26 also prevent the complete product from bending to keep the coupling between the receiving section 22 and the insertion section 23 in a preferable state.
For example, the attachment member 20 thus manufactured may be used as a hair rubber band that is a type of accessory. In this case, the elongate member 21 itself may be colored, and metal powder or foil may be mixed into it. Alternatively, gold threads, silver threads or threads having other colors may be wound around the elongate member 21.
According to any of the above-described manufacturing methods, the attachment member can be finished with high precision without a complicated step of fusing end faces thereof in spite of the fact that double molding is used.
Although the elongate member 21 of some of the exemplifying embodiments described above has different diameters at the center and ends thereof, the invention is not limited to such a configuration, and the elongate member may alternatively have a straight shape or constant diameter along its entire length. In addition, although the grooves 25a and 26a have been described as extending in the axial direction of the elongate member, the invention is not limited to such a configuration, and one or both of the grooves may extend in directions across the axis, i.e., non-axial directions. Further, with respect to attachment member 20, the same advantage as described above can be achieved by forming protrusions having various shapes on the surface of the coupling shafts 25 and 26 instead of the grooves 25a and 26a.
The invention provides distinct advantages in that while a prior art attachment member does not have any flexibility, and multiple versions of such attachment member must be manufactured in practice, these drawbacks are not present in the invention. Furthermore, prior art attachment members are unsuitable for purposes such as wrapping whereas attachment members in accordance with the invention are suitable for wrapping. Finally, when a rubber material is used as the fiber material of prior art attachment members, the attachment member cannot be rigidly coupled with fixing members produced from polypropylene, and the attachment member becomes very much vulnerable to deterioration. This problem does not arise in attachment members in accordance with the invention.
With an attachment member according to the invention as described above, since an elastomer is used as the elongate member, the attachment member in its entirety or as a whole has expandability. Therefore, there is no need to manufacture multiple versions of attachment members having different lengths, i.e., only a single length attachment member is needed and the attachment member can be used for binding or wrapping something by expanding the elongate member. When the attachment member is used for suspending an item to be displayed, since the loop formed by the elongate member expands, various arrangements may be made in displaying the item. The attachment member can also be used to combine a plurality of items by taking advantage of the expandability of the elastomer. In addition, the hardness of the elastomer can be freely set depending on the use of the attachment member, and the elastomer may be colored and/or may be mixed with a metal. Thus, the attachment member can be provided as a product having elegant taste.
The invention provides two types of methods of manufacturing an attachment member as described above. It is difficult to bond a rubber material and polypropylene according to the related art because of the nature of those materials. According to methods disclosed above however, an elongate member constituted by an elastomer is inserted in a fixing element when the member is extrusion-molded. When double molding is employed, fixing elements at ends of an elastomer are fused and integrated with each other.
The methods of manufacturing an attachment member according to the invention are carried out as described above. Thus, the elongate member has advantages resulting from the use of an elastomer, e.g., expandability of the elongate member as a whole. As a result, there is no need for manufacturing multiple or plural variants of an attachment member having different lengths. An attachment member can be used for binding and wrapping purposes by expanding the elongate member thereof to tightly bind or wrap something. When the elongate member is used for suspending an item to be displayed, since the loop formed by the elongate member expands, various arrangements can be made in displaying the item. Further, the attachment member can be used to combine a plurality of items by taking advantage of the expandability thereof.
The hardness of the elastomer can be freely selected or adjusted in accordance with the purpose of use of the same. Further, the elastomer can be colored or mixed with metal powder or foil. Thus, the attachment member can be provided as a product having elegant taste, and the member can be also used as a decorative item.
According to one embodiment of a manufacturing method described above, a hard or rigid fixing element is first molded and is thereafter firmly coupled with an elastomer having an appropriate or desired length to serve as the elongate member. No additional requirements are placed on these manufacturing steps, and relevant operations can therefore be easily carried out. Thus, an attachment member can be provided at a low cost and can be finished with improved precision.
While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and, therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.
Number | Date | Country | Kind |
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2008-271653 | Oct 2008 | JP | national |