JP2000287329A - Corrugated tube for protecting electric-wire coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To conduct proper decision by visually recognizing whether or not the quantity or rate of an overlap is proper or excessive or too small in an overlap type corrugated tube for protecting an electric-wire coating in which a slit section is overlapped and a mouth is closed. SOLUTION: An electric wire is inserted into a cylindrical body from a slit section 11 formed extending over the overall length of a cylinder and brought to a mouth open state, an edge end section 12 on one end side forming the slit section 11 is overlapped to an edge end section 13 on the other end side, and a mouth is closed in the overlap type corrugated tube 10. A plurality of lap lines for visually recognizing proper or a too-small or excessive overlapping rate to the quantity of an overlap or the overall length of the cylinder by stages are indicated to the edge end section 13 at the other end of a superposed section in parallel with the extending direction of the slit section 11 at that time, for example, the lap line (A) displaying a working limit by the too-small overlap and the lap line (B) displaying the proper overlap are indicated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible corrugated tube for covering and protecting an electric wire and a wiring harness for an automobile wiring over its entire length.

[0002]

2. Description of the Related Art FIGS. 2 (a) and 2 (b) are perspective views showing a general state of a corrugated tube of this type in a state in which a wire opening slit is closed and a state in which the slit is closed before closing a wire insertion slit. The main body of the corrugated tube 1 molded from plastic or the like has a slit portion formed by cutting out a part of the cylinder circumference over the entire length of the cylinder.

[0003] An electric wire is inserted into the inside of a cylinder through a slit portion in an open state, and is housed to protect the sheath. After receiving the wire, the slit is closed to prevent the wire from protruding. that time,
The edge end 2 on one end forming the slit portion is overlapped with the edge end 3 on the other end by overlapping and closed.

Further, such a corrugated tube 1 is
The periphery of the peak and the periphery of the valley are alternately connected to enable contraction and compression using appropriate elasticity. In the case of the corrugated tube 1 in the illustrated example, the pitch of the ridge portion and the valley portion at one end side and the other end side of the slit portion of the overlapping portion are formed differently. That is, the pitch between the concave portion 2a of the valley peripheral portion and the convex portion 2b of the mountain peripheral portion on one end side of the edge end portion 2 is equal to the concave portion 3 of the valley peripheral portion on the other end side of the edge end portion 3.
a is different from the pitch of the convex portion 3b of the mountain periphery. By overlapping such different pitches, when the edge ends 2 on one end are overlapped on the edge ends 3 on the other end, they can be tightly engaged with each other.

[0005]

However, FIG.
The conventional corrugated tubes shown in FIGS. 1A and 1B have the following problems to be solved.

That is, when the edge portion 2 on one end is overlapped with the edge end 3 on the other end from above, and the slit portion is closed, whether the amount or rate of overlap due to the overlap is set properly, or It is very difficult to judge clearly whether it is too large or too small by relying only on visual recognition. As a result, there is a problem that the quality is deteriorated due to variations in the lapping work.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an overlap type corrugated tube in which a slit portion is overlapped and a mouth is closed, and it is visually determined whether the amount or rate of the overlap is appropriate or too large or small. An object of the present invention is to provide an electric wire coating protecting corrugated tube.

[0008]

According to the first aspect of the present invention, there is provided a corrugated tube for protecting an electric wire covering, wherein a slit portion formed by cutting off a part of a tube periphery of a flexible tube main body is provided over the entire length of the tube. After inserting the electric wire into the inside of the cylindrical body from the slit portion in the open state, the edge portion of one end forming the slit portion is overlapped with the edge end portion of the other end, and the slit portion is closed, so that the electric wire is closed. An overlap type corrugated tube that covers and protects, and the edge amount of the other end side of the overlapped portion is adjusted in parallel with the direction in which the slit portion extends in such a manner that the overlap amount or the overlap ratio with respect to the entire length of the cylinder circumference is appropriate. Alternatively, a plurality of lap lines for visually recognizing the overs and unders are displayed.

With the above-described configuration, it is possible to reliably determine whether the amount of overlap for closing the mouth of the slit portion is a target appropriate amount or whether the amount of overlap is too large or too small by visually checking the lap line.

According to a second aspect of the present invention, there is provided a corrugated tube for protecting electric wires, wherein the plurality of wrap lines are displayed at least at the closest distance from the edge of the other end. A lap line (A) indicating an under-limit of the amount or the overlap rate, and an appropriate overlap amount or displayed at a position further away from the lap line (A) from the edge of the edge on the other end side. And a wrap line (B) that indicates an appropriate overlap rate and, when exceeded, indicates an excess.

In this case, in a state where the lap line (A) showing the under-limit is visible, if the amount of superposition is smaller than the lap line (A), that is, specifically, the one end on the side to be superimposed from above If the edge of the side edge end is at a position before the lap line (A), it can be determined that the usage limit is not reached. Further, in a state where the edge of the edge end on one end side coincides with the lap line (B), it can be determined that the amount of superposition is appropriate, and the lap line (B) cannot be seen beyond that. If it is, it is a guide to judge it as excessive.

According to a third aspect of the present invention, there is provided a corrugated tube for protecting electric wire covering, wherein a wrap line indicating a medium wrap amount or a medium wrap ratio is provided between the wrap line (A) and the wrap line (B). It is further characterized by being displayed.

In this case, if an intermediate lap line is further displayed at an intermediate position between the lap lines (A) and (B), it becomes more convenient to judge the standard.

According to a fourth aspect of the present invention, there is provided a corrugated tube for protecting electric wires, wherein the plurality of wrap lines are displayed in different colors.

That is, if a plurality of lap lines are displayed in different colors, it is possible to confirm at a glance whether the amount is appropriate or too small or too large.

According to a fifth aspect of the present invention, there is provided a corrugated tube for protecting electric wire covering, wherein the plurality of wrap lines are displayed in different emission colors.

Similarly, by displaying a plurality of wrap lines in different colors, for example, with luminescent paints, it is possible to make accurate determinations even when the environment at the place of use or work is somewhat dark.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a corrugated tube for protecting electric wire coating will be described in detail with reference to the drawings.

FIGS. 1 (a) to 1 (c) show an overall perspective view of an overlap type corrugated tube 10 according to the present embodiment in a state where a slit is opened and two states in a state where a slit is closed. It is a front view.

The tube body made of plastic material has a slit 11 with a part of the circumference of the tube cut out.
Are formed over the entire length of the cylinder. As shown in FIGS. 2 (a) and 2 (b) of the conventional example, the tube main body can be deformed by contraction and compression utilizing appropriate elasticity by alternately connecting the ridges and valleys. It has become. Also,
As shown in FIGS. 1 (a) and 1 (b), the slits 11 are formed with different pitches at the ridge and valley portions at one end side and the other end side of the overlapping portion. That is, the pitch between the convex portion 12a of the peak peripheral portion forming the edge end portion 12 on one end side and the concave portion 12b of the peripheral portion of the valley is equal to the convex portion 13a of the peak peripheral portion forming the edge end portion 13 on the other end side. The pitch differs from the pitch of the recess 13b in the peripheral portion. By overlapping such different pitches, when the edge ends 12 on one end are overlapped on the edge ends 13 on the other end, they can be tightly engaged with each other.

Therefore, in the overlap type corrugated tube 10 of the present embodiment, a plurality of parallel corrugated tubes 10 are provided along the direction in which the slit portion 11 extends at the edge end portion 13 on the other end side which is overlapped below. Lap line (A), (B)
Is displayed.

One wrap line (A) is at edge end 1
3 is displayed near the edge, and the other wrap line (B) is displayed parallel to a position farther from the edge than the wrap line (A).

The wrap line (A) closer to the edge
Can be displayed in “red”, and the farther lap line (B) can be displayed in “green” or the like. The red wrap line (A) is unsuitable for use with the overlap amount or the overlap ratio with respect to the entire length of the cylinder circumference in a state where the slit portion 11 is overlapped and the mouth is closed. It is the limit line for judging the standard. On the other hand, the green wrap line (B) is a line used as a guideline that the overlap amount when the slit portion 11 is overlapped and the mouth is closed is a target appropriate amount. If the edges of the edge 12 on the one end side overlap until the green wrap line (B) disappears,
This is a line for determining that the amount of overlap is excessive.

With the above configuration, the overlap type corrugated tube 10 of the present embodiment can be used as follows.

An electric wire (or wire harness) is inserted into the inside of the cylinder from the slit portion 11 in the opened state, and is accommodated to protect the sheath. After receiving the wire, the slit end 11 is closed to prevent the wire from protruding out of the tube or to prevent the wire from biting into the slit edge and being damaged. The mouth is closed by overlapping and overlapping the end edge 3 on the end side from above.

At the time of closing the mouth of the slit portion 11,
As shown in FIG. 1B, when the edge end 12 on one end is overlapped with the edge end 13 on the other end along the green wrap line (B) from above, it is expressed by a wrap ratio. If it is 20%, it can be determined that the target lap rate is appropriate. If the edge ends 12 on one end overlap until the green wrap line (B) disappears, it can be determined that the overlap is excessive.

On the other hand, FIG. 1C shows the case where the edge end 12 on one end is overlapped with the edge end 13 on the other end along the red wrap line (A) from above, and the lap amount is shown. Is, for example, 5%, indicating the limit of use as the corrugated tube 10. Assuming that the red wrap line (A) can be seen in front of the edge 1 at one end.
In a state where the two edges overlap, it is determined that the overlap is too small and is below the usage limit. In the case of such an overlap that is less than the usage limit, the inner diameter of the corrugated tube 10 in the closed mouth state becomes unnecessarily large, so that it can be determined that the corrugated tube 10 is incompatible with the specified diameter of the wire or the wire harness to be housed inside.

In this way, the slit work can be closed simply and quickly with the set amount and rate of the overlap without confusing the judgment of the overlap work, and the wires and wires to be accommodated and protected are provided. It can be used as a guide for judging whether or not the harness is compatible or not.

In the above embodiment, two parallel display lines using a red wrap line (A) and a green wrap line (B) have been described, but the number is not limited to such a number from the gist of the present invention. . For example, one marking line may be displayed in another color between the red and green colors as a guide for determining an intermediate overlap amount (rate).

Further, as an application example of the above embodiment,
In the case of the present invention, the display is not limited to the above-described colored display of different colors, and each wrap line may be displayed with a luminescent paint having a different luminescent color. In this case, there is an advantage that the determination can be made even if the working environment or the use environment is somewhat dark or from a distant place.

[0031]

As described above, the corrugated tube for protecting the electric wire covering according to the present invention is preferably of a type in which the slit portion for inserting the electric wire is overlapped when the mouth is closed, and the amount of overlap ( The appropriateness of the (rate) can be visually recognized at a glance, and the quality without variation can be maintained.

[Brief description of the drawings]

1 (a) to 1 (c) are perspective views showing an open state of a slit portion and an appropriate wrap line (B) in an embodiment of a corrugated tube for protecting electric wire covering according to the present invention. FIG. 4 is a perspective view showing a closed state of the slit portion superimposed on the slit portion, and a perspective view showing a closed state of the slit portion superimposed on the lap line (A) of the use limit.

FIGS. 2 (a) and 2 (b) are a perspective view showing a state in which a slit is opened in a corrugated tube for protecting electric wire covering in a conventional example, and a perspective view showing a state in which the slit is closed. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Wrap (method) corrugated tube 11 Slit part 12 Edge edge part on one end side 12a Convex part on crest peripheral part 12b Concave part on trough perimeter 13 Edge end part on other end side 13a Convex part on crest peripheral part 13b Recess A Red wrap line B Green wrap line

Claims (5)

[Claims] 1. A slit portion formed by cutting off a part of a tube circumference of a flexible tube main body over the entire length of the tube, and a slit portion is formed after an electric wire is inserted into the inside of the tube from the slit portion in an open state. An overlap type corrugated tube for covering and protecting the electric wire by overlapping the edge end on one end side of the groove with the edge end on the other end side and closing the slit portion, wherein the overlapped one is A plurality of lap lines for visually recognizing the appropriate or excessively small or large overlap ratio with respect to the overlap amount or the entire length of the cylinder circumference in parallel with the direction in which the slit portion extends are displayed at the edge end on the other end side. A corrugated tube for protecting electric wire coating, which is characterized in that: 2. A lap line (A) which is displayed at least at a position closest to the edge of the edge on the other end side and indicates an under-limit of an overlap amount or an overlap ratio. ), And is displayed at a position further away from the lap line (A) than the edge of the edge end on the other end side to indicate a proper overlap amount or a proper overlap ratio. 2. A corrugated tube for protecting electric wire covering according to claim 1, comprising: a wrap line (B) indicating the above. 3. A lap line indicating a middle overlap amount or a middle overlap ratio is further displayed between the lap line (A) and the lap line (B). The corrugated tube for protecting electric wire coating according to claim 2. 4. The corrugated tube according to claim 1, 2, or 3, wherein the plurality of wrap lines are displayed in different display colors. 5. A method according to claim 1, wherein the plurality of wrap lines are displayed in different emission colors.
The corrugated tube for protecting electric wire coating according to 3 or 4.