JP2000118877A - Electric wire winding drum - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components and to sufficiently protect a wire at the time of winding the wire around a body part by allowing attachment of the various-sized body parts to only one kind of flange parts. SOLUTION: This electric wire winding drum 1 comprises a pair of sheet-like flange parts 4 respectively formed with engaging parts 6 and a nearly tube-like body part 3 disposed between the flange parts 4. Both ends of the body part 3 are locked to the engaging parts 6 of the flange parts 4 so that the body part 3 and the flange parts 4 are integrally connected. The engaging part 6 of each the flange part 4 is formed at a recessed position inside an inner side face 4a of the flange part 4, while each the flange part 4 is formed with a support part 8 at a distance S from the engaging part 6 toward the inside B in a radial direction. A reinforcing rib 9 is projectingly provided on a rear face of the body part 3 in its axial direction over a nearly full length. An end part 9a of the reinforcing rib 9 is placed and provided on the support part 8 of each the flange part 4 with an end part 3a of the body part 3 engaged with the engaging part 6 of the flange part 4.

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 technique for engaging a body portion with a collar portion.

[0002]

2. Description of the Related Art Conventionally, engaging portions are provided on a pair of thin plate-shaped flanges, respectively, and both ends of a substantially cylindrical body disposed between the flanges are engaged with the engaging portions of the flanges. 2. Description of the Related Art There is known an electric wire winding drum in which a body and a flange are integrally connected. One example is shown in FIGS. In the figure, an engaging portion 30 of the collar portion 4 is provided so as to protrude outward from an inner surface 4 a of the collar portion 4, and an engaging claw 31 is protruded from an outer peripheral surface of the engaging portion 30. While the end 3a of the body 3
Is formed with a hole 13 with which an engaging claw 31 is engaged.
With the end 3a of the body 3 fitted to the outer peripheral surface of the engaging portion 30, the engaging claw 31 is inserted and locked in the hole 13 to thereby form the body 3
And the collar part 4 are temporarily fixed.
And the body 3 are integrally connected.

[0003]

However, unlike the prior art, the engaging portion 3 protruded outward from the inner side surface 4a of the flange portion 4.
In the structure in which the end 3a of the body 3 is engaged with the body 3 by fitting it into the outer diameter 0, the dimension L in the radial direction of the body 3 is determined by the outer diameter L 'of the engagement portion 30. In order to obtain an electric wire winding drum 1 'provided with a plurality of types 3, it is necessary to produce a plurality of types of body portions 3 having different diameters and a plurality of types of flange portions 4 corresponding thereto, respectively. There was a problem that the number of points increased and the cost increased. Moreover,
As shown in FIG. 11, since the tip of the engaging claw 31 provided on the engaging portion 30 of the collar portion 4 protrudes outward from the hole 13 of the body portion 3, the electric wire is wound around the electric wire winding drum 1 ′. When winding the wire, there is also a problem that the electric wire hits the distal end of the engaging claw 31 to cause damage or breakage.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to reduce the number of parts by allowing a large or small body to be attached to one type of flange. An object of the present invention is to provide an electric wire winding drum capable of sufficiently protecting an electric wire when the electric wire is wound around a body.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pair of thin plate-shaped flanges 4 each provided with an engagement portion 6, and a substantially cylindrical body disposed between the flanges 4. The both ends of the portion 3 are engaged with the engaging portions 6 of the collar portion 4 so that the body portion 3 and the
And an engaging portion 6 of the collar portion 4 is provided at a position recessed from the inner side surface 4a of the collar portion 4 and is further radially inner than the engaging portion 6. A support portion 8 is provided at a distance S on the side B, and a reinforcing rib 9 is provided on the back surface of the body portion 3 over substantially the entire length in the axial direction, and an end 3a of the body portion 3 is provided. The end portion 9a of the reinforcing rib 9 is mounted on the support portion 8 of the collar portion 4 in a state of being engaged with the engagement portion 6 of the collar portion 4. The engagement portion 6 is formed on the inner surface 4 of the collar portion 4.
a, the end 3 of the body 3
a with the engaging portion 6 of the collar portion 4
Since the protruding portion does not protrude to the outside of the collar portion 4, it is possible to prevent the engaging portion 6 from hitting the electric wire while the electric wire is wound around the electric wire winding drum 1. Further, since the engaging portion 6 that engages with the end 3a of the body 3 and the support 8 that supports the end 3a of the body 3 are provided at a distance S in the radial direction A, the distance S The dimension L in the radial direction A excluding the end 3a of the body 3 can be made different by an amount corresponding thereto, and therefore, the common flange 4 can be used also for a plurality of types of body 3 having different diameters.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described. The electric wire winding drum 1 is made of, for example, PP (polypropylene). The drum body 2 is constituted by engaging both ends of a large-diameter body portion 3 arranged at the engaging portion 6 of the collar portion 4. FIGS. 1 and 2 illustrate a large diameter body 3A of, for example, 500φ. The body 3A and the pair of flanges 4 are formed by injection molding or the like. (Not shown). A rod shaft (not shown) of the electric wire winder is inserted into a center hole 5 (FIG. 5) provided in the flange portion 4 of the drum body 2, and the electric wire is wound by rotating the drum body 2 with the rod shaft. It is designed to be wound up.

As shown in FIGS. 3 and 4, a reinforcing rib 9 is provided on the inner peripheral surface of the body 3A so as to protrude over the entire length of the body 3A in the axial direction G. The reinforcing ribs 9 are attached to the trunk 3
A large number of protrusions are provided at intervals in the circumferential direction H of A, and function to reinforce the body 3A made of synthetic resin.

[0008] Both ends of the body 3A are respectively locked by engagement portions 6 provided on the collar portion 4. As shown in FIG. 1, the flange 4 has an opening 10 concentric with the end 3a of the body 3A at a portion facing the end 3a of the body 3A. The outer peripheral surface of the opening 10 is constituted by an outer peripheral rib 11 abutting on the outer peripheral surface of the end 3a of the body 3A, and the inner peripheral surface of the opening 10 is a reinforcing rib protruding from the back of the body 3A. End 9 of 9
The supporting portion 8 is provided with the supporting portion 8a. An engaging portion 6 is provided between the outer peripheral rib 11 of the opening 10 and the support portion 8 to engage with the end 3a of the body 3A. In addition,
Reference numeral 12 in the drawing denotes a die-cutting hole.

Here, the support portion 8 is provided on the radially inner side B side of the engagement portion 6 at a distance S from the engagement portion 6. That is, the engaging portion 6 that engages with the end 3a of the body 3A
And a support portion 8 for supporting the end portion 3a of the trunk portion 3A are formed at a distance S in the radial direction A. Here, the inner end portion 8a of the support portion 8 projects outward (to the right in FIG. 1) from the inner side surface 4a of the flange portion 4, and the support area of the reinforcing rib 9 by the support portion 8 is increased. I have.

The engaging portion 6 is constituted by an elastic projection 7 which is elastically deformable in the radial direction A, and a base end of the elastic projection 7 is supported on the outer peripheral surface side of the collar portion 4. The distal end of the elastic projection 7 is a free end, and the distal end thereof has a trunk 3A.
An engagement claw 14 that is inserted and locked into a hole 13 provided in the end 3a of the second projection 3a protrudes. The engaging claw 14 is provided on the flange 4
The engaging claw 14 is disposed at a position recessed by a predetermined distance D inside the inner surface 4 a of the collar 4.
It does not protrude outward (right side in FIG. 2) from a. Incidentally, reference numeral 15 in the drawing denotes a reinforcing rib of the elastic projection 7.

An outer peripheral rib 11 is provided in the opening 10.
A connecting rib 16 is provided for connecting the supporting member 8 to the supporting member 8. The connecting rib 16 is provided on the side of the elastic projection 7 independently of the elastic projection 7, and an L-shaped insertion recess into which the end 3a of the body 3A is inserted is provided above the connecting rib 16. A place 17 is formed. The insertion recess 17 functions to prevent further insertion of the body 3A in a state where the engaging claw 14 of the elastic projection 7 is inserted and locked in the hole 13 of the end 3a of the body 3A.

[0012] As shown in FIGS. 5 and 6, a locking hole 18 for starting winding of the electric wire is formed in the collar portion 4 at an outer peripheral position relative to the trunk portion 3A. In this example, the locking hole 17
Is formed with an inclined surface 19 for guiding the end of the electric wire along the outer peripheral surface of the body 3A, so that the winding start of the electric wire can be easily locked. Also, in consideration of the case of attaching large and small body parts having different diameters,
Two inclined surfaces 19 (one not shown) in one locking hole 18
It is preferable that one inclined surface 19 is formed along the outer peripheral surface of the trunk portion having a large diameter, and the other inclined surface is formed along the outer peripheral surface of the trunk portion having a small diameter. Then, the end of the electric wire from the body portion having a small diameter is guided by the inclined surface 19 while being supported by the inclined rib 50, and is inserted into the locking hole 18 to start winding. 5 is a bolt insertion hole when the large-diameter trunk 3A (FIG. 1) is attached, and 36 is a bolt insertion hole when the small-diameter trunk 3B (FIG. 7) is attached.

The end 3 of the body 3 is located between the outer peripheral rib 11 and the elastic projection 7 at the opening 10 of the collar 4.
When a is fitted, the elastic projection 7 engages with the hole 13 provided at the end 3a of the body 3, and the collar 4 and the body 3 are temporarily fixed. The drum body 2 can be assembled by integrally connecting the portion 4 and the body portion 3. At this time, since the engaging portion 6 is constituted by the elastic projection 7, when the elastic projection 7 is engaged with the hole 13 of the body 3, the locking claw 14 provided at the tip of the elastic projection 7 is You will be sure to get into it.

Since the elastic projection 7 is provided at a position recessed from the inner side surface 4a of the collar 4, the end 3a of the body 3 is engaged with the elastic projection 7 of the collar 4. Thus, the elastic projections 7 do not protrude outside the collar portion 4. That is, since the portion excluding the end portion 3a of the body portion 3 protrudes outside the collar portion 4, even if the locking claw 14 protrudes from the hole portion 13 provided in the end portion 3a, this locking The nail 14 is the brim 4
Does not protrude to the outside, so that the locking claw 14 does not hit the electric wire when the electric wire is wound around the electric wire winding drum 1, so that there is no possibility that the electric wire is damaged or disconnected. .

An elastic projection 7 engaging the end 3a of the body 3 and a support 8 supporting the end 3a of the body 3 are separately provided. Since the distance S is provided in the radial direction A therebetween, when the body 3 is formed, if the dimension L in the radial direction A of the main body 3b excluding the end 3a of the body 3 is arbitrarily different by the distance S described above. It is possible to make it.
One example is shown in FIGS.

FIGS. 7 and 8 show an example in which a body 3B having a small diameter of, for example, 450.phi. The structure of the flange portion 4 is the same as that of the embodiment shown in FIGS. 1 and 2, and the corresponding portions are denoted by the same reference numerals. In this embodiment, the body 3B includes, for example, a body
The end 3a of the flange 3 is integrally connected to the end 3a via the vertical portion 22.
The end 3a of B is inserted and locked. The reinforcing ribs 9 projecting from the back surface of the body 3B
Is divided into an end rib 9A protruding from the back surface of the end portion 3a and a main body rib 9B protruding from the back surface of the main body portion 3b. The main body rib 9B is connected to the end portion 3c of the main body portion 3b. The end 3c of the main body 3b and the end rib 9A are mounted on the support portion 8 as shown in FIG. Further, the elastic projections 7 of the collar portion 4 are recessed inward from the inner surface 4a of the collar portion 4 by a distance D (ΔM) by the thickness M of the vertical portion 22 of the trunk portion 3B. In a state where the end 3a of the portion 3B is engaged with the elastic projection 7, the vertical portion 22 of the body 3B and the inner side surface 4a of the flange portion 4 are flush with each other (the state of FIG. 8), and the electric wire is caught. Can be reliably prevented. Further, FIG. 9 shows that the dimension of the end 3a of the body 3 in the radial direction A is 500φ.
And a case approximately between 450φ and 450φ. The other structure is basically the same as that of FIG. 8. In this example, the main body 3b of the body 3B 'is not directly mounted on the support portion 8, but is provided on the back surface of the body 3B' for reinforcement. The end 9 a of the rib 9 is cut out in a substantially L-shape when viewed from the side, and this cut-out portion is mounted on the support portion 8. In addition, the trunk 3B '
Of course in the radial direction A is not limited to a substantially intermediate value between 450 and 500 φ.

As described above, the large-diameter trunk 3A shown in FIGS. 1 and 2 or the small-diameter trunk 3B shown in FIGS.
Can be engaged with the flange portion 4 of one type. As a result, the common flange portion 4 can also be used for a plurality of types of body portions 3 as a result, the number of parts can be reduced, the cost can be reduced, and the members can be rationalized.

[0018]

As described above, according to the first aspect of the present invention, an engaging portion is provided on each of a pair of thin plate-shaped flange portions, and a substantially cylindrical body portion disposed between the flange portions is provided. An electric wire winding drum in which both ends are engaged with an engagement portion of a collar portion, and the body portion and the collar portion are integrally connected, wherein the engagement portion of the collar portion is recessed from an inner surface of the collar portion. And a support portion is provided at a distance radially inward from the engagement portion,
Reinforcing ribs protrude from the rear surface of the body over substantially the entire length in the axial direction, and the ends of the reinforcing ribs are engaged with the ends of the body engaged with the engaging portions of the flanges. Since the engaging portion is provided on the support portion of the collar portion, the engaging portion is provided at a position recessed from the inner surface of the collar portion, so that the end portion of the body portion is engaged with the engaging portion of the collar portion. When the wire is wound on the wire winding drum, the engaging portion does not hit the wire, so that the wire is damaged or disconnected. And the electric wires can be sufficiently protected. Further, since the engaging portion that engages with the end portion of the body portion and the support portion that supports the end portion of the body portion are provided at a distance in the radial direction, the end portion of the body portion is provided by the distance. It is possible to arbitrarily change the radial dimensions except for the above, so that a common flange can be used for a plurality of types of trunks having different diameters. As a result, the number of parts can be reduced, and The cost of the winding drum can be reduced and the members can be rationalized.

[Brief description of the drawings]

FIG. 1 is an exploded sectional view showing an example of an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a state where the end of the trunk is engaged with a collar.

FIG. 3 is a side cross-sectional view of the body part of the above.

FIG. 4 is a front view of the body part of the above.

FIG. 5 is a front view illustrating an electric wire locking hole of the above.

FIG. 6 is a sectional view taken along line FF of FIG. 5;

FIG. 7 is an exploded sectional view of another example using a small-diameter trunk portion.

FIG. 8 is a cross-sectional view of a state in which the end of the small-diameter trunk portion is engaged with the collar portion.

FIG. 9 is a cross-sectional view of another example in which the end of the trunk is engaged with the collar.

FIG. 10 is an exploded perspective view of a conventional electric wire winding drum.

FIG. 11 is a partially cutaway side view for explaining a conventional engagement state between a collar portion and a body portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire winding drum 3 Trunk part 4 Collar part 4a Inner side surface 6 Engagement part 8 Support part 9 Reinforcement rib 9a End part A Radial direction B Radial inward S distance

Claims (1)

[Claims] An engaging portion is provided on each of a pair of thin plate-shaped flanges, and both ends of a substantially cylindrical body disposed between the flanges are engaged with the engaging portions of the flange to form a body. An electric wire winding drum integrally formed with a collar portion, wherein an engagement portion of the collar portion is provided at a position recessed from an inner surface of the collar portion, and is radially inward of the engagement portion. A support portion is provided at a distance, and a reinforcing rib is projected from substantially the entire length in the axial direction on the back surface of the trunk portion, and the end of the trunk portion is engaged with the engaging portion of the collar portion. An electric wire winding drum, wherein an end of the reinforcing rib is mounted on a support portion of a collar portion in a state.