JP2001163527A - Electric wire winding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a coating of an electric wire from being damaged and to prevent a character and a number printed in an outer face of a coating layer of the electric wire from being erased by abraision, when a winding start end for the electric wire is taken out of an electric wire extraction hole to the outside. SOLUTION: A pair of flanges 2 are provided on both ends of a barrel part 1 to constitute a drum body 3. The electric wire extraction hole 5 is formed to take the winding start end for the electric wire 4 wound onto the barrel part 1 out to the outside of the drum 3. A chambered part 7 chambered roundly is provided in an opening edge part of the extraction hole 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire winding drum, and more particularly to a structure of an electric wire take-out hole for taking out a winding start end of an electric wire wound around a body to the outside of a drum body.

[0002]

2. Description of the Related Art Heretofore, a drum has been constructed by providing a pair of flanges at both ends of a body, and the start of winding of an electric wire wound around the body is attached to the flange of the drum. There is a known one provided with an electric wire takeout hole for taking out to the outside. Conventionally, as shown in FIG. 7, an outer opening 5 a that opens to the outside of the flange 2 of the wire outlet hole 5.
The opening edge of the inner opening 5b opening to the inside and the opening edge of the inner opening 5b form an edge 6a, and the flange 2 is made of a hard synthetic resin such as hard polypropylene. Here, the edge portion 6a is formed in order to easily form a male type and a female type.

On the other hand, the electric wire 4 wound around the body has a core wire covered with a coating layer such as an insulating layer made of cross-linked polyethylene. Then, the winding start end of the electric wire 4 is taken out from the electric wire taking-out hole 5 to the outside. As described above, the outer opening 5a and the inner opening 5b of the electric wire taking-out hole 5 have hard edges 6a. As a result, as shown in FIG.
In addition, although letters and numbers such as a product number and a voltage are printed and displayed on the outer surface of the coating layer of the electric wire 4, the coating layer is rubbed by the edge portion 6a to form the coating layer. Printed letters and numbers disappear and become invisible, or partially disappear and appear as different letters and numbers (for example, part of the number 9 disappears and looks like the number 7, or the number 8 Part disappears and looks like 3 or 5). In addition, the edge portion 6a cuts into the coating layer of the electric wire to form a concave portion in the electric wire, so that there is a problem that the portion of the concave portion must be cut off when connecting with another electric wire.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and when the starting end of winding of an electric wire is taken out of the electric wire taking-out hole, the covering of the electric wire may be damaged or the electric wire may be damaged. An object of the present invention is to provide an electric wire winding drum in which letters and numbers printed on the outer surface of a coating layer are not rubbed and disappear.

[0005]

In order to solve the above-mentioned problems, an electric wire winding drum according to the present invention comprises a drum body 3 having a pair of flanges 2 provided at both ends of a body 1 to form a drum body 3. A wire take-out hole 5 for taking out the start of winding of the wire 4 wound around the drum 3 to the outside of the drum body 3 is formed, and a round chamfered portion 7 is provided at an opening edge of the wire take-out hole 5. It is characterized by the following. With such a configuration, even if the coating layer of the electric wire 4 taken out from the electric wire taking-out hole 5 rubs against the opening edge of the electric wire taking-out hole 5, the coating layer of the electric wire 4 is damaged, or the electric wire 4 is damaged. Letters and numbers displayed on the outer surface of the coating layer 4 do not disappear.

It is preferable that the outer edge of the outer opening 5a, which is open to the outside of the flange of the wire outlet hole 5, be rounded to form a chamfered portion 7. With such a configuration, the electric wire 4 is inserted from the inside of the drum body 3 into the electric wire extraction hole 5.
When the wire 4 is taken out of the drum body 3 and rubbed against the outer edge of the outer opening 5 a of the wire outlet hole 5, the coating layer of the wire 4 is damaged or the coating layer of the wire 4 is damaged. The letters and numbers displayed on the outer surface of the are not erased.

It is preferable that the edge of the inner opening 5b, which is opened inside the flange 2 of the wire outlet hole 5, be rounded to form a chamfered portion 7. With such a configuration, even if the electric wire 4 hits and rubs against the opening edge of the inner opening 5 b of the electric wire outlet hole 5, the coating layer of the electric wire 4 is damaged or the outer surface of the coating layer of the electric wire 4 is damaged. The displayed letters and numbers do not disappear.

Further, the wire outlet hole 5 is formed by an outlet groove 8 opened on the inner surface and the outer surface of the flange 2, and the groove bottom 8a of the outlet groove 8 has one end located on the inner surface side of the flange 2 and another end. The groove is inclined so that the end is located on the outer surface side of the flange portion 2, and the groove depth of the extraction groove portion 8 is increased as going outward, and the flange portion 2 of the electric wire extraction hole 5 formed by the extraction groove portion 8 is formed.
It is preferable to form a chamfered portion 7 in which at least a portion corresponding to the end of the groove bottom of the takeout groove portion 8 among the opening edges of the outer opening 5a opened to the outside is rounded. With such a configuration, the wire 4 can be smoothly taken out from the inside of the drum body 3 to the outside through the wire taking-out hole 5 which is a portion opened to the outside of the taking-out groove 8 through the taking-out groove 8 in which the groove bottom 8a is inclined. In this case, the electric wire 4 taken out along the inclined groove bottom 8a is
Even if the portion corresponding to the end of the groove bottom 8a of the takeout groove portion 8 of the outer opening 5a of the electric wire takeout hole 5 is rubbed, this portion becomes the round chamfered portion 7,
The coating layer of the electric wire 4 is not damaged, and the characters and numerals displayed on the outer surface of the coating layer of the electric wire 4 do not disappear.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments shown in the accompanying drawings.

The drum body 3 is made of, for example, PP (polypropylene). As shown in FIG. 1, a substantially cylindrical body 1 is provided with a pair of flanges 2 at both ends. These trunks 1
The pair of flanges 2 are formed by injection molding or the like, and each molded product is assembled and fixed with bolts 9.

A large number of reinforcing ribs 10 protrude from the outer surface of the flange 2 provided on both sides of the drum body 3.
Is absorbed by the reinforcing ribs 10 to prevent the flange 2 from cracking. Also,
A plurality of anti-slip ribs 12 are provided on the outer peripheral surface of the flange 2 at intervals in the circumferential direction so as not to slip when the drum body 3 is placed. As described above, a plurality of bolt holes 11 through which bolts 9 for fixing the body portion 1 and the two flange portions 2 penetrate are formed in the flange portion 2 at intervals in the circumferential direction. A fitting groove 20 for fitting an end of the body 1 is formed inside the flange 2, and the end of the body 1 is fitted into the fitting groove 20, and the two flanges 2 are bolted 9. And the body 1 are connected and fixed.

The flange 2 is provided with an electric wire take-out hole 5 for taking out the starting end of the electric wire 4 wound around the body 1 to the outside of the drum body 3.

Here, in the embodiment shown in the accompanying drawings, FIG.
As shown in FIG. 5 to FIG. 5, the flange 2 is formed with an extraction groove 8 which is opened on the inner surface and the outer surface.
An electric wire takeout hole 5 is constituted by a takeout groove 8 opened inside and outside of the wire. As shown in FIG.
The groove bottom 8a is inclined such that one end is located on the inner surface side of the flange portion 2 and the other end is located on the outer surface side of the flange portion 2 so that the groove depth of the takeout groove portion 8 goes outward. The portion of the end of the take-out groove 8 which is deeper and which is open to the outside of the flange 2 at the deeper end is the outer opening 5 a of the electric wire take-out hole 5.
The end with the shallower groove depth is an inner opening 5 b opened inside the flange 2. 4 to 6, B indicates the outside of the flange 2 and C indicates the inside.

In the present invention, a round chamfered portion 7 is provided at the opening edge of the wire outlet hole 5.

In the embodiment shown in the accompanying drawings, the opening edge of the outer opening 5a of the wire outlet hole 5 and the inner opening 5b
Are rounded to form a chamfered portion 7. The radius of curvature of the chamfer 7 is, for example, 2 mm to 4 m.
Set to about m.

When the electric wire 4 is wound around the drum body 3, the winding start end of the electric wire 4 is taken out from the inside of the drum body 3 and taken out of the flange 2 through an electric wire take-out hole 5 formed by a groove 8. Then, the end of the electric wire 4 is attached to the outside of the flange 2 using an electric wire end holder (not shown) on the outer surface side of the flange 2. Thereafter, the electric wire 4 is wound around the body 1 inside the drum body 3. When the winding start end of the electric wire 4 is taken out from the inside of the drum body 3 to the outside of the flange portion 2, the electric wire 4 is inclined so that the groove depth becomes deeper as the groove bottom 8 a goes outside from the inside of the drum body 3. Since the wire is taken out to the outside through the wire take-out hole 5 formed by the take-out groove portion 8, the wire can be smoothly taken out from the wire take-out hole 5 using the take-out groove portion 8 having the inclined groove bottom 8a as a guide.

As described above, when the electric wire 4 is taken out from the electric wire taking-out hole 5, even if the coating layer of the electric wire 4 rubs against the opening rim of the electric wire taking-out hole 5, the chamfer is rounded at the opening rim of the electric wire taking-out hole 5. The provision of the chamfered portion 7 prevents the coating layer of the electric wire 4 from being damaged or the characters and numerals displayed on the outer surface of the coating layer from the electric wire 4 from disappearing.

In the above embodiment, both the outer edge of the outer opening 5a and the inner edge of the inner opening 5b of the electric wire taking-out hole 5 have the chamfered portion 7 which is rounded. A portion A corresponding to the end of the groove bottom 8a of the take-out groove 8 at the opening edge of the outer opening 5a is a chamfered portion 7 which is rounded. In other words, when the winding start end of the electric wire 4 is taken out from the inside of the drum body 3 through the electric wire take-out hole 5, an external force in the direction of the arrow in FIG. 6 may act on the electric wire 4. Is a groove bottom 8a of a takeout groove 8 at the opening edge of the wire takeout hole 5.
May be strongly rubbed against the portion A corresponding to the end of the wire outlet hole 5a. Accordingly, as described above, at least the groove bottom 8a of the outlet groove 8 at the opening edge of the outer opening 5a of the wire outlet hole 5 as described above. Can be dealt with by forming a rounded chamfered portion 7 at a portion A corresponding to the end portion of. A male / female mold boundary line is formed at the rounded chamfered portion of the outer opening of the wire outlet hole 5.

Of course, the inner opening 5 of the wire outlet hole 5
By rounding the opening edge of b to form a chamfered portion 7, the coating layer of the electric wire 4 is also damaged at the entrance of the electric wire take-out hole 5, or a character displayed on the outer surface of the coating layer of the electric wire 4. And numbers can be kept from disappearing.

In the above-described embodiment, an example is shown in which the wire outlet hole 5 is formed by the outlet groove portions 8 whose both ends are opened inside and outside the flange portion 2. However, the wire outlet hole 5 has both ends inside and outside the flange portion 2. Needless to say, the shape may be other than the shape of the groove that is opened at the bottom.

[0021]

As described above, according to the first aspect of the present invention, a pair of flanges are provided at both ends of the body to form a drum body, and the electric wire wound around the body. An electric wire take-out hole for taking out the winding start start end of the drum body to the outside of the drum body is formed, and a round chamfered portion is provided at an opening edge of the electric wire take-out hole. Even if the cover layer of the wire rubs against the opening edge of the wire outlet hole, the wire cover layer may be damaged,
Alternatively, the letters and numbers displayed on the outer surface of the wire covering layer do not disappear, thereby eliminating problems caused by damage to the wire covering layer, inability to read letters and numbers, and misreading. Is what you can do.

According to a second aspect of the present invention, in addition to the effects of the first aspect of the present invention, in addition to the effects of the first aspect, the opening edge of the outer opening which is open to the outside of the flange portion of the wire outlet hole is rounded. When the wire is pulled out of the drum from the inside of the drum body to the outside of the drum body, even if the wire rubs against the opening edge of the outer opening of the wire outlet hole, the wire is The coating layer will not be damaged, or the letters or numbers displayed on the outer surface of the wire coating layer will not disappear.As a result, troubles caused by damage to the wire coating layer, characters or numbers cannot be read or misread It is possible to eliminate the trouble caused by the occurrence of the problem.

According to a third aspect of the present invention, in addition to the effects of the first or second aspect of the present invention, an opening edge of an inner opening opening inside the flange portion of the wire outlet hole. Since the part is rounded and chamfered, when the wire is pulled out of the drum from the inside of the drum body to the outside of the drum body, the wire rubs against the opening edge of the inner opening of the wire take-out hole Even if the wire coating layer is not damaged or the letters and numbers displayed on the outer surface of the wire coating layer do not disappear, troubles caused by damage to the wire coating layer and letters and numbers can be read. Or not
It is possible to eliminate trouble caused by misreading.

According to the fourth aspect of the present invention, in addition to the effects of the first to third aspects of the present invention, the electric wire outlet holes are opened on the inner surface and the outer surface of the flange. The groove bottom of the take-out groove is inclined such that one end is located on the inner surface side of the flange and the other end is located on the outer surface side of the flange so that the groove depth of the take-out groove is outside. , And at least a portion corresponding to the end of the groove bottom of the take-out groove portion among the opening edges of the outer opening opened to the outside of the flange portion of the wire take-out hole formed of the take-out groove portion is formed as a rounded chamfered portion. Therefore, the electric wire can be smoothly taken out from the inside of the drum body through the electric wire take-out hole, which is a portion opened to the outside of the take-out groove portion, through the take-out groove portion whose groove bottom is inclined from the inside of the drum body. The wire can be easily taken out to the outside through the take-out hole, and in this case, the wire taken out along the inclined groove bottom is taken out of the take-out groove at the opening edge of the outer opening of the wire take-out hole. Even if it hits the part corresponding to the end of the wire, this part is a round chamfered part, so the wire coating layer will be damaged or the letters and numbers displayed on the outer surface of the wire coating layer will disappear As a result, troubles caused by damage to the coating layer of the wire, inability to read letters and numbers,
It is possible to eliminate trouble caused by misreading.

[Brief description of the drawings]

FIG. 1 is an overall perspective view showing an electric wire winding drum of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a sectional view on the figure.

4A is a sectional view taken along line XX of FIG. 2, and FIG.
FIG. 4 is a cross-sectional view in which main parts are further enlarged.

FIG. 5 is a sectional view taken along line YY of FIG. 4;

FIG. 6 is an explanatory diagram showing a state in which electric wires are passed through the electric wire takeout hole from inside the drum body.

FIG. 7 is an explanatory view showing a state in which an electric wire is passed from the inside of a drum body to a conventional electric wire takeout hole.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body part 2 Flange part 3 Drum body 4 Electric wire 5 Electric wire take-out hole 6 Opening edge 7 Chamfered part 8 Take-out groove part 8a Groove bottom 8b Groove side wall

Claims (4)

[Claims] 1. A drum body comprising a pair of flanges provided at both ends of a body to form a drum body, and a wire take-out hole for taking out a winding start start end of an electric wire wound around the body from the inside of the drum body to the outside. A wire winding drum characterized in that a round chamfer is provided at the opening edge of the wire take-out hole. 2. The electric wire winding drum according to claim 1, wherein the outer edge of the outer opening that opens to the outside of the flange portion of the electric wire outlet hole is rounded to form a chamfer. 3. The electric wire winding drum according to claim 1, wherein the opening edge of the inner opening that opens inside the flange portion of the electric wire take-out hole is rounded to form a chamfer. 4. An electric wire taking-out hole is formed by a taking-out groove portion opened on the inner surface and the outer surface of the flange portion, and the groove bottom of the taking-out groove portion has one end located on the inner surface side of the flange portion and the other end portion having the flange portion. It is inclined so as to be located on the outer surface side, and the groove depth of the takeout groove portion is made deeper as going outward, and at least the takeout groove portion of the opening edge of the outer opening opened outside the flange portion of the wire takeout hole formed by the takeout groove portion 3. The electric wire winding drum according to claim 2, wherein a portion corresponding to an end of the groove bottom is rounded.