JP6940145B2 - Long tube for marking - Google Patents

Description

The present invention is further related to an improvement of a long marking tube that is attached to an electric wire or the like by marking (printing) various characters, symbols, etc. in order to identify an object to be identified such as an electric wire or the like. More specifically, it relates to an improvement of a long marking tube used to separate a tube portion marked at predetermined intervals from a subsequent tube portion and attach it to an electric wire or the like to identify the electric wire or the like. Is.

A long tube for marking used for wire identification, etc. has a marking on the outer peripheral surface, and then the marked portion is separated from the subsequent tube portion, and the short tube is marked and separated in this way. Tube (identification marker) is fitted to the end of an electric wire or the like to distinguish the electric wire or the like from other electric wires or the like (see FIGS. 19 and 20 of Patent Document 1).

More specifically, as shown in Patent Document 1, this type of marking long tube is composed of an elastic plastic tube body, and the long tube is provided with characters and symbols for identification at predetermined intervals. After the identification mark such as, etc. is given, the part with the identification mark is separated from the subsequent tube part to form a short tube-shaped identification marker, and this tube-shaped identification marker is used for the electric wire before attaching the electric wire terminal. (See paragraphs (0058) to (0060) of Patent Document 1).

To ensure that the identification marker does not loosen at the end of the wire and is gripped securely, the long tube shall consist of or preliminarily flattened a tube of elastic material with folds on the inner surface. It consists of a flat tube that is molded and spread over a circular object to be identified such as an electric wire so that it can be adhered to it, or it can be made of a heat-contracting tube that is formed to be adhered by heating and shrinking after covering the tube. Is made up

However, if the inner surface of the tube is uneven, the thickness of the tube will be uneven, so when marking a long tube, when marking with a contact-type mechanical printing machine, the type will be evenly printed. In addition, it becomes difficult to flatten the tube, and when printing is performed in this state, the printing pressure becomes non-uniform, so that there is a drawback that printing unevenness occurs in the marking. In addition, since the flat tube has a large protrusion from the outer circumference of the object to be identified after being fitted to the object to be identified, the identification marker may shift on the object to be identified or come off from the object to be identified by being caught by another object. Further, the heat-shrinkable tube requires a heating step after attachment, and has a drawback of low workability.

In order to eliminate the above-mentioned drawbacks, the applicant makes the wall thickness of the long tube body substantially equal over the entire length, and engages and holds the object to be identified non-linearly in the longitudinal direction. As described above, the wire body and the like can be identified without providing unevenness on the inner surface by including the engagement holding portion formed by twisting the tube body having a rectangular cross section, an elliptical shape, or a similar cross section in a spiral shape. We are proposing a long tube for marking that can accurately grip an object (see Japanese Patent Application No. 2016-241906).

Since the long tube according to this proposal has the same wall thickness over the entire length, the tube can be crushed flat at the time of marking, so that marking unevenness does not occur and, for example, it has a rectangular cross section. Since the tube body is formed by twisting in a spiral shape, it can be reliably held by an electric wire or the like.

However, since the long tube according to this proposal is formed by twisting the tube body having a rectangular or elliptical cross section in a spiral shape, it requires a complicated die such as a deformed extrusion at the time of manufacturing, and has a drawback that it is difficult to mold. there were.

Japanese Unexamined Patent Publication No. 2001-39404 Japanese Patent Application No. 2016-241906

The problem to be solved by the present invention is that it is possible to reliably grip an object to be identified such as an electric wire without providing unevenness on the inner surface, and it is possible to expand the applicable range of dimensions of the object to be identified such as an electric wire. It is an object of the present invention to provide a long tube for marking which can be marked without causing uneven marking and which is easy to mold.

The problem-solving means of the present invention is a long tube for marking, which is made of a long tube body made of an elastic material such as rubber or plastic used for marking at predetermined intervals. The main body has an equal wall thickness over the entire length, and surrounds an arc-shaped inner ridge that extends in the longitudinal direction and an arcuate outer ridge that extends in the longitudinal direction and is an isolated outer ridge. possess alternately in a direction, the the arcuate inner ridge and the outer ridge, to provide a marking elongated tube and having the same or substantially the same radius of curvature.

In another problem-solving means of the present invention, the long tube body can each have three or more isolated inner and outer ridges.

In still another problem-solving means of the present invention, the long tube body can have up to five isolated inner and outer ridges each.

Since the long tube for marking of the present invention has an equal wall thickness over the entire length, when the long tube is crushed during marking, it becomes a flat state without unevenness, and even marking can be performed. Further, this long tube main body has an arc-shaped inner ridge extending in the longitudinal direction and an arc-shaped inner ridge extending in the longitudinal direction, and an isolated outer ridge extending in the longitudinal direction alternately in the circumferential direction. Therefore, the marked long tube can be fitted to an adherend such as an electric wire having various outer diameters and can be reliably held by the adherend.

Further, the long tube for marking according to the present invention has a form in which perfect circles are alternately projected in and out in the circumferential direction, and these ridges have the same or almost the same radius of curvature, so that the structure is simple. It can be easily molded with the die of the above, and a long tube can be manufactured at low cost.

It is sectional drawing of the long tube for marking by one Embodiment of this invention. FIG. 2 (A) is a @ perspective view showing a state in which the long tube of FIG. 1 is marked and cut, and FIG. 2 (B) is an electric wire for one cut portion (tube-shaped identification marker) of FIG. 2 (A). It is a perspective view of the state of being fitted in. FIG. 2 is an end view of a state in which the tubular identification marker of FIG. 2B is attached to electric wires having different outer diameters. It is explanatory drawing which shows the range of the outer diameter which can be attached with the tubular identification marker of FIG. 2 (B). It is a cross-sectional view of a long tube according to a plurality of forms of the present invention in which the number of ridges is different.

When the embodiment of the present invention is described in detail with reference to the drawings, FIG. 1 shows a marking long tube 10 according to one embodiment of the present invention, and the marking long tube 10 is made of rubber. It is made of a long tube body 12 made of an elastic material such as plastic.

The long tube main body 12 has an equal wall thickness T over the entire length, extends in the longitudinal direction of the long tube main body 12, and is provided alternately in the circumferential direction so as to protrude from the inside and outside adjacent to each other. It is equipped with lonely ridges 14 and 16.

These inner and outer arcuate ridges 14 and 16 have the same or substantially the same radius of curvature. Immediately, as shown in FIG. 1, the inward arcuate ridge 14 has a radius of 14R in length at the center of the arc at the position indicated by 14RC, and the outward arcuate ridge 14 has an outward arcuate ridge. Reference numeral 16 denotes a radius having a length of 16R at a position where the center of the arc is indicated by 16RC.

When the inward ridge 14 is pushed outward, the long tube main body 12 having such a cross-sectional shape becomes a perfect circle with a radius R together with the outward ridge 16. This is because the inner and outer ridges 14 and 16 having the same or almost the same curvature half diameter are provided alternately at equal intervals in the circumferential direction.

Next, the usage state of the marking long tube 10 of the present invention will be described by taking as an example a long tube 10 having three inner and outer arcuate ridges 14 and 16 of FIGS. 1 to 4.

The long tube 10 for marking is marked (printed) at predetermined intervals by using, for example, a marking tube processing device provided with a marking means and a tube cutting means as shown in FIG. 1 of Patent Document 1. After that, the marked portion is separated from the subsequent tube portion to form a short tubular identification marker M as shown in FIG. 2 (A), and as shown in FIG. 2 (B), this identification marker M is formed. Is attached to the end of the electric wire 18C, which is an example of the object to be identified 18, before the electric wire terminal (not shown) is attached.

As can be seen from FIG. 3, in this form of the marking long tube 10, the short tubular identification marker M formed from the long tube 10 has three arc-shaped ridges 14 that are inwardly protruding. Is elastically tightened to the electric wire 18C, which is an example of the object to be identified 16, and is held by the electric wire 18C. When the tubular identification marker M is attached to the electric wire 18C, the electric wire 18C is forcibly inserted into the identification marker M against the elasticity of the identification marker M, so that the electric wire 18C is inserted into the inward arcuate ridge 14 The identification marker M is put on the electric wire 18C so as to grip the electric wire 18C.

As can be seen from FIGS. 3 and 4, the long tube 10 of the present invention is larger than the circle 14C tangent to the three arcuate ridges 14 and larger than the inner diameter of the perfect circle 12C of the main body 12 of the long tube 10. It can be applied to electric wires 18C having various small outer diameters. FIG. 3A shows a case where the identification marker M is attached to an electric wire 18C having an outer diameter larger than that of the circle 14C, and FIG. 3B shows a case where the outer diameter is slightly smaller than the inner diameter of the perfect circle 12C. The case where the identification marker M is attached to the electric wire 18C is shown. As can be seen from FIGS. 3 (A) and 3 (B), the identification marker M obtained from the long tube 10 of the present invention has an electric wire 18C having a small outer diameter to an electric wire 18C having a large outer diameter. It can be fitted to electric wire 18C with a wide range of dimensions.

FIG. 5 shows different forms of the elongated tube 10 of the present invention, and FIG. 5 (A) shows a form having three inner and outer arcuate ridges 14 and 16 similar to those of FIGS. 1 to 4. 5 (B) shows a form having four inner and outer arcuate ridges 14 and 16, and FIG. 5C shows a form having five inner and outer arcuate ridges 14 and 16. If the number of ridges is small, the dimensional conformance range of the electric wire 18C (identified object) becomes wide, but the holding force becomes small, and if the number of ridges is large, the dimensional conformance of the electric wire 18C (identified object) becomes wide. Although the range is narrowed, the holding force is increased, so that the number of internal and external ridges is preferably 3 to 5.

In addition to being applicable to objects 18 having various outer diameters in any form, the arcuate ridges 14 and 16 are linear along the longitudinal direction of the tube body 12. Long tubes can be easily formed with a simple extrusion die.

According to the present invention, it is possible to adhere to an object to be identified with a high holding force, marking can be applied evenly, and a long tube of one dimension can be applied to an object to be identified in a wide range of dimensions. It has high industrial applicability because it can be manufactured and is easy to manufacture.

10 Long tube for marking 12 Long tube body 12C Perfect circle 14 Inward arc-shaped ridge 16 Outward arc-shaped ridge 14R, 16R Center of ridge arc 14RC, 16RC Radius of curvature of ridge arc 18 Identified object 18C Electric wire T Wall thickness M Identification marker

Claims (3)

In a marking long tube made of a long tube body made of an elastic material such as rubber or plastic used for marking at predetermined intervals, the long tube body is equal over the entire length. has a wall thickness, and exchange to each other have a a arc-shaped outer ridge is collision outwardly extending also in the longitudinal direction and arcuate inner ridge is collision inward circumferentially extending in the longitudinal direction, the A long tube for marking , wherein the isolated inner ridge and the arc-shaped outer ridge have the same or substantially the same radius of curvature. The long tube for marking according to claim 1 , wherein the long tube body is a long tube for marking having three or more isolated inner and outer ridges. The long tube for marking according to claim 1 or 2 , wherein the long tube main body is a long tube for marking having five or less isolated inner and outer ridges.

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