JP2017226520A - Bobbin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bobbin that never has a collar easily peeling off from a trunk body even in high-temperature environment and is easily molded.SOLUTION: The present invention relates to a bobbin 1 comprising a trunk body 2 wound with a linear body and a collar 4 fixed to one end of the trunk body. A hook part 10 inserted into a hole 4a bored in the collar to engage the collar is provided at one end of the trunk body. A direction along an axis of rotation of the trunk body is an inserting direction (X direction) of the hook part, a direction which is orthogonal to the inserting direction of the hook part and in which the hook part flexes when the hook part is inserted into the hole is a thickness direction (Y direction) of the hook part, and a direction which is orthogonal to both the inserting direction of the hook part and the thickness direction of the hook part is a width direction (Z direction) of the hook part.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bobbin, and more particularly to a bobbin used for winding a linear body such as an optical fiber cable.

A linear body such as an optical fiber cable is usually wound around a bobbin and stored or transported. The bobbin is sometimes called by a name such as a reel, a drum, a spool, or a winding frame, and is formed of, for example, a foamed polystyrene (see Patent Document 1).
FIG. 9 is a cross-sectional view showing an example of a conventional bobbin. The bobbin 100 shown in the figure includes a cylindrical body 101 around which a linear body is wound, and a pair of flanges 102 and 103 positioned at both ends of the body 101.
When winding the linear body around the bobbin 100, the linear body is removed from the bobbin 100 from another device while rotating the bobbin 100 with respect to the rotational axis X through a rotation shaft through a shaft hole (not shown) of the bobbin 100. It is guided around the body 101, aligned and wound.

The bobbin 100 includes a main body 104 and a flange member 105. The main body 104 is formed by integrating the body 101 and one of the pair of flanges 102, 103, and the flange member 105 is the other. It is 鍔 102 of.
The eaves member 105 has a bottomed hole 105a into which the end 104a of the main body 104 is inserted, and the main body 104 and the eaves member 105 are joined by an adhesive in the bottomed hole 105a.

Japanese Utility Model Publication No. 62-77178

  In general, the bobbin 100 around which a linear body such as an optical fiber is wound is housed in a packing box such as a cardboard box and shipped, and may be transported by a truck or a ship. When transported in this way, if it is loaded above the truck bed or on the deck of a ship, even if the temperature is around 20 ° C, the temperature inside the packaging box exceeds 50 ° C by being exposed to radiant heat. Sometimes. In addition, the bobbin 100 may be shipped to foreign countries. For example, in the Middle East region, the bobbin 100 is used in a higher temperature environment than in Japan.

In such a high temperature environment, since the adhesive strength of the adhesive generally decreases, the adhesive strength between the main body 104 and the eaves member 105 is reduced, and the eaves member 105 is not attached to the main body 104 (the body 101) even if a large force is not applied. May come off.
In addition, it is possible to increase the adhesive strength by forming the end of the main body with a female screw structure and the collar member with a male screw structure and screwing the main body (body) and the collar member, but the rotation of the bobbin Depending on the direction, there is a possibility that the screwing between the main body and the eaves member is loosened, and it is difficult to determine that the main body and the eaves member are fully tightened. In addition, the screw structure is difficult to manufacture with a mold and cannot be mass-produced.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a bobbin that is easy to mold without the heel being easily peeled off from the trunk even in a high temperature environment.

  The bobbin which concerns on 1 aspect of this invention is a bobbin provided with the fuselage | wound by which a linear body is wound, and the collar fixed to one end of this trunk | drum, Comprising: The hole provided in the said collar at the end of the said trunk | drum A hook portion that is inserted into the hook and is engaged with the flange, and a direction along the rotation axis of the body is defined as an insertion direction of the hook portion, and is a direction orthogonal to the insertion direction of the hook portion, and the hook portion The direction in which the hook portion bends when the wire is inserted into the hole is the thickness direction of the hook portion, and the direction orthogonal to both the insertion direction of the hook portion and the thickness direction of the hook portion is the width direction of the hook portion. And

  According to the above, it is difficult for the heel to be easily peeled off from the trunk even in a high-temperature environment as compared with a case where the heel is joined only with an adhesive. Moreover, it does not loosen depending on the rotation direction of the bobbin. Further, the fixed state between the body and the heel can be understood by looking at the engagement between the hook portion and the heel from the outer surface of the heel. In addition, the body can be manufactured by molding, and mass production of bobbins is facilitated.

It is sectional drawing for demonstrating the bobbin by Example 1 of this invention. It is a disassembled perspective view of the bobbin of FIG. It is a top view for demonstrating the relationship between the trunk | drum of FIG. 1, and a metal mold | die. It is a partial expanded sectional view for demonstrating joining of the trunk | drum of FIG. 1, and a gutter member. It is sectional drawing for demonstrating the bobbin by Example 2 of this invention. It is sectional drawing for demonstrating the bobbin by Example 3 of this invention. It is sectional drawing for demonstrating the bobbin by Example 4 of this invention. It is sectional drawing for demonstrating the bobbin by Example 5 of this invention. It is sectional drawing for demonstrating the conventional bobbin.

[Description of Embodiment of the Present Invention]
First, the contents of the embodiment of the present invention will be listed and described.
The bobbin which concerns on 1 aspect of this invention is a bobbin provided with (1) the fuselage by which a linear body is wound, and the collar fixed to the end of this trunk | drum, Comprising: The end of the said trunk | drum is provided in the said collar. A hook portion that is inserted into the formed hole and engages with the flange is provided, a direction along the rotation axis of the body is defined as an insertion direction of the hook portion, and a direction orthogonal to the insertion direction of the hook portion, A direction in which the hook portion bends when the hook portion is inserted into the hole is a thickness direction of the hook portion, and a direction orthogonal to both the insertion direction of the hook portion and the thickness direction of the hook portion is the hook portion. The width direction of
One end of the body is provided with a hook portion that engages with the heel, and the heel does not easily peel off from the body even in a high-temperature environment as compared with a case where the heel is joined only with an adhesive. Further, it does not loosen depending on the rotation direction of the bobbin as compared with the case where the body and the heel are screwed together. Further, the fixed state between the body and the heel can be understood by looking at the engagement between the hook portion and the heel from the outer surface of the heel. Further, since the width direction of the hook portion is a direction orthogonal to both the insertion direction of the hook portion and the thickness direction of the hook portion, the body has a half structure with respect to the plane including the rotation axis. Therefore, it becomes possible to manufacture the body by molding, and mass production of the body is facilitated.

(2) Of the pair of heels positioned at both ends of the body, one heel and the body are integrally formed. If one of the collars and the body are integrally formed in advance, the strength of the bobbin can be improved and the bobbin assembling process can be simplified.
(3) A plurality of the hook portions are provided at one end of the body. The bonding strength between the body and the heel can be further increased.
(4) The body and the heel are formed of foamed polystyrene. By forming with a polystyrene foam, weight reduction can be achieved, and when a linear body wound around the trunk is fed out, it is possible to prevent a large pulling force from being applied to the linear body. Further, the total weight including the linear body can be suppressed.

[Details of the embodiment of the present invention]
Hereinafter, preferred embodiments of a bobbin according to the present invention will be described with reference to the drawings. In addition, this invention is not limited to these illustrations, is shown by the claim, and intends that all the changes are included within the meaning and range equivalent to the claim. Moreover, in the following description, the structure which attached | subjected the same code | symbol also in different drawing is the same, and the description may be abbreviate | omitted.

1 is a cross-sectional view for explaining a bobbin according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of the bobbin of FIG.
As shown in FIG. 1, the bobbin 1 includes a cylindrical body 2 around which a linear body such as an optical fiber is wound, and a pair of disk-shaped flanges 3 and 4 positioned at both ends of the body 2. The shapes of the ridges 3 and 4 are substantially the same.

The bobbin 1 is composed of, for example, two members, a main body 5 and a flange member 6, and the main body 5 is formed integrally with the body 2 and one of the pair of flanges 3, 4. The body 2 is arranged concentrically on the heel 3. The collar member 6 is the other collar 4. In addition, it is also possible to comprise one hook 3 and the trunk | drum 2 by another body.
As shown in the figure, the strength of the bobbin 1 is improved by integrally forming the flange 3 and the body 2 in advance. Moreover, since the bobbin 1 will be completed if the other collar 4 is fixed to the integral structure of the collar 3 and the trunk | drum 2, the assembly process of the bobbin 1 can be simplified.

When the linear body is wound around the body 2 or when the linear body is unwound from the body 2, the bobbin 1 can rotate about the rotational axis X of the body 2, that is, the bobbin 1.
Note that the body 2 may be formed hollow. If the body 2 is formed to be hollow, the body 2 becomes lighter and it is possible to prevent a large pulling force from being applied to the linear body when the linear body wound around the body 2 is fed out. Moreover, the total weight including the wound linear body can be suppressed.

  In order to further reduce the weight, it is desirable that the body 2 (main body 5) and the other flange 4 be made of a lightweight material such as polystyrene foam as a molding material.

  As shown in FIG. 2, for example, two holes 4 a are formed in the other flange 4. The hole 4a passes through the flange 4 in a direction (X direction) parallel to the rotation axis X of the bobbin 1, and extends along the Z direction orthogonal to the X direction. Further, the hole 4a has a different width in a part of the X direction (also referred to as a step), for example, as seen in the Y direction orthogonal to the X direction and the Z direction, and as shown in FIG. The width of the hole 4a is shorter at the side closer to the circular end surface 2a of the body 2 than at the side far from the circular end surface 2a. The other flange 4 and the body 2 are fixed in the hole 4a.

For example, two hook portions 10 are provided on the circular end surface 2 a of the body 2, and are configured to be inserted into the holes 4 a of the other flange 4. Thereby, compared with the case where one hook part is formed, the joint strength of the collar 4 and the trunk | drum 2 can be raised more.
Each hook portion 10 extends from the circular end surface 2a along the rotation axis X of the bobbin 1, and extends along the rotation axis X of the bobbin 1 in connection with the base 11, for example, the hole 4a constituting the step. And a hook-like portion 12 that engages with the inner surface.

  The base 11 and the bowl-shaped part 12 are both formed in a straight shape, for example, but the bowl-shaped part 12 is formed thicker than the base 11. That is, the direction along the rotation axis X of the bobbin 1 (X direction) is the insertion direction of the hook portion 10, which is a direction orthogonal to the X direction and when the hook portion 10 is inserted into the hole 4 a of the other flange 4. The direction in which the hook portion 10 bends (the Y direction) is the thickness direction of the hook portion 10, and the hook-like portion 12 is thicker in the Y direction than the base portion 11 in order to engage the inner surface of the hole 4 a, for example. Is formed. And the hook part 10 is formed along the direction (Z direction, the width direction of the hook part 10) orthogonal to both X direction and Y direction.

FIG. 3 is a plan view for explaining the relationship between the body of FIG. 1 and a mold.
The width direction (Z direction) of the hook portion 10 is a direction orthogonal to both the X direction and the Y direction shown in FIG. 1 and the like, and is along a direction orthogonal to the plane P including the rotation axis X of the body 2. Is formed. For this reason, the trunk | drum 2 (main body 5) can be made into the half structure on the basis of the surface P containing the rotating shaft X. FIG. Therefore, it becomes possible to manufacture the body 2 by mold forming including the molds K1 and K2 divided into two by the surface P, and mass production of the body 2 is facilitated.

FIG. 4 is a partially enlarged cross-sectional view for explaining the joining of the body and the eaves member of FIG. 1, and the way of joining will be described below.
As shown in FIG. 4A, first, in order to fix the other flange 4 and the body 2 in the hole 4a, the flange 4 is lowered toward the circular end surface 2a of the body 2.
Since the hook-shaped portion 12 of the hook portion 10 has a portion protruding from the inner peripheral surface of the hole 4a in a state where the center of the flange 4 and the center of the body 2 are matched, the hook-shaped portion 12 is formed in the hole 4a. When inserted into the hook portion 10, the hook portion 10 bends in the Y direction, and as shown in FIG. 4B, the hook portion 10 is inserted into the hole 4a in a bent posture.

  Next, when the hook-shaped portion 12 reaches the level difference of the hole 4a, as shown in FIG. 4C, the bending of the hook portion 10 is eliminated, and the hook-shaped portion 12 engages with the inner surface of the hole 4a. In the case of this example, the tip of the hook-shaped portion 12 does not protrude from the hole 4 a, and the hook portion 10 and the other hook 4 are flush with the outer surface of the hook 4. Note that an adhesive may be used when fixing with the hook structure.

  As described above, the circular end surface 2a of the body 2 is provided with the hook portion 10 that engages with the other flange 4, and the flange 4 is separated from the body 2 even in a high-temperature environment as compared with the case where only the adhesive is joined. Does not easily peel off. Further, it does not become loose depending on the rotation direction of the bobbin 1 as compared with the case where the body 2 and the collar 4 are screwed. Further, the fixed state of the body 2 and the flange 4 can be determined by looking at the engagement between the hook portion 10 and the flange 4 from the outer surface of the flange 4.

FIG. 5 is a cross-sectional view for explaining a bobbin according to a second embodiment of the present invention.
In the said Example 1, the hook part 10 demonstrated and demonstrated the example engaged with the inner surface of the hole 4a. However, the hook portion 10 may engage with the outer surface of the other collar 4. Specifically, as shown in FIG. 5, the hole 4a formed in the other ridge 4 penetrates the ridge 4 in the X direction and extends along the Z direction, but the hole 4a seen in the Y direction. The holes have the same width and no step.

  The hook portion 10 provided on the circular end surface 2a of the body 2 includes a base portion 11 and a hook-like portion 12. For example, the length of the base portion 11 is substantially equal to the penetration length of the hole 4a. Yes. For this reason, when the tip of the hook-shaped portion 12 is inserted into the hole 4a, the hook portion 10 bends in the Y direction. However, when the hook-shaped portion 12 passes through the hole 4a, as shown in FIG. 10 is eliminated, and the convex part of the hook-like part 12 protruding from the hole 4 a is engaged with the outer surface of the hook 4.

FIG. 6 is a cross-sectional view for explaining a bobbin according to a third embodiment of the present invention.
In the said Example 1, 2, although the hook-shaped part 12 of the hook part 10 was formed in the straight shape, the hook-shaped part 12 may have a taper which becomes tapered. Specifically, as shown in FIG. 6, the hole 4 a of the other ridge 4 is a hole having no step as in the example described with reference to FIG. 5, whereas the hook portion 10 has a ridge-like shape with the base 11. For example, the length of the base 11 is formed substantially equal to the length of the hole 4a.

As shown in FIG. 6, the bowl-shaped portion 12 has a first slope 13 that is inclined with respect to a plane including the rotation axis X of the bobbin, and the first slope 13 is the bowl-shaped portion 12. Are gradually narrowed from the circular end surface 2 a of the body 2 toward the tip of the hook portion 10.
Since the tip surface of the hook-shaped portion 12 is inclined, the hook-shaped portion 12 can be easily inserted into the hole 4a. When the convex portion of the hook-shaped portion 12 is inserted into the hole 4a, the hook portion 10 is When the hook-shaped portion 12 passes through the hole 4a, the hook portion 10 is released from bending, and the convex portion of the hook-shaped portion 12 protruding from the hole 4a engages with the outer surface of the flange 4.

  Note that the tapered tapered first slope 13 described in the third embodiment can be provided at the tip of the bowl-shaped portion 12 described in the first embodiment.

FIG. 7 is a cross-sectional view for explaining a bobbin according to a fourth embodiment of the present invention.
In the first to third embodiments, the example of the hook portion 10 having the base portion 11 and the hook-shaped portion 12 has been described. However, the hook portion 10 may be configured by only the hook-shaped portion 12. Specifically, as shown in FIG. 7A, the hole 4a of the other flange 4 penetrates the flange 4 in the X direction and extends along the Z direction, but includes the rotation axis X of the bobbin. The second slope 7 is inclined with respect to the surface. And the 2nd slope 7 of this example is provided by the reverse taper near the outer peripheral surface of the collar 4, for example.

  The hook portion 10 is composed of only the hook-shaped portion 12, and the length thereof is substantially equal to the length of the hole 4a. As shown in FIG. 7A, the bowl-shaped portion 12 has a third inclined surface 14 that is inclined with respect to the surface including the rotation axis X of the bobbin, and the third inclined surface 14 is, for example, the body 2. Near the outer peripheral surface, the hook-shaped portion 12 is provided with a reverse taper so as to gradually become thicker from the circular end surface 2 a of the body 2 toward the tip of the hook portion 10.

For this reason, when the tip of the hook-shaped portion 12 is inserted into the hole 4a, the hook portion 10 bends in the Y direction. However, as the hook-shaped portion 12 moves forward, the bending of the hook portion 10 is gradually eliminated. The hook-shaped portion 12 engages with the inner surface of the hole 4a. In this example, the hook portion 10 and the other flange 4 are flush with each other on the outer surface of the flange 4.
Thereby, the joint strength of the other collar 4 and the trunk | drum 2 (main body 5) can be raised more.

  As shown in FIG. 7B, the second inclined surface 7 may be provided with a reverse taper that is tapered, for example, near the rotation axis of the flange 4. And the 3rd slope 14 of the hook-shaped part 12 engaged with it may be provided in the outer peripheral surface of the fuselage | body 2 by the reverse taper.

FIG. 8 is a cross-sectional view for explaining a bobbin according to a fifth embodiment of the present invention.
In the first to fourth embodiments, an example in which two hook portions 10 are provided on the body 2 has been described. However, it can also be configured by a single hook portion 10. Specifically, as shown in FIG. 8, the hole 4a of the other ridge 4 penetrates the ridge 4 in the X direction and extends along the Z direction, but the width of the hole 4a viewed in the Y direction is the same. There is a hole without a step, and for example, one hole is provided on the rotation axis of the flange 4.

Further, the other flange 4 may have a bottomed hole 8 for receiving the circular end surface 2 a of the body 2. If the bottomed hole 8 is concentric with the axis of rotation of the rod 4, even if only one hook portion 10 is provided at one end of the body 2, the axis of rotation of the rod 4 and the axis of rotation of the bobbin can be easily provided. Can match. The bottomed hole may be rectangular. In this case, the end surface 2a of the body 2 is also rectangular.
The hook part 10 of the body 2 has a base part 11 and a hook-like part 12, for example, the length of the base part 11 is formed substantially equal to the length of the hole 4a, and is provided, for example, on the rotation axis X of the bobbin. It has been.

  Thereby, when the tip of the hook-like part 12 is inserted into the hole 4a, the hook part 10 bends in the Y direction, and when the circular end surface 2a of the fuselage 2 fits in the bottomed hole 8, the fuselage 2 and the flange 4 are Become concentric. Next, when the hook-shaped portion 12 passes through the hole 4a, as shown in FIG. 8, the bending of the hook portion 10 is eliminated, and the rear end of the hook-shaped portion 12 protruding from the hole 4a is engaged with the outer surface of the hook 4. .

DESCRIPTION OF SYMBOLS 1 ... Bobbin, 2 ... Body, 2a ... Circular end surface, 3, 4 ... Gutter, 4a ... Hole, 5 ... Main body, 6 ... Gutter member, 7 ... Second slope, 8 ... Bottomed hole, 10 ... Hook part, 11 ... base, 12 ... bowl-shaped part, 13 ... first slope, 14 ... third slope.

Claims (4)

A bobbin comprising a body around which a linear body is wound, and a hook fixed to one end of the body,
One end of the body is provided with a hook portion that is inserted into a hole provided in the flange and engages with the flange.
The direction along the rotation axis of the body is the insertion direction of the hook portion, and the direction perpendicular to the insertion direction of the hook portion is a direction in which the hook portion bends when the hook portion is inserted into the hole. A bobbin having a thickness direction of the hook portion and a direction perpendicular to both the insertion direction of the hook portion and the thickness direction of the hook portion being a width direction of the hook portion.   The bobbin according to claim 1, wherein one of the pair of heels positioned at both ends of the body is integrally formed with the body.   The bobbin according to claim 1, wherein a plurality of the hook portions are provided at one end of the body. The bobbin according to any one of claims 1 to 3, wherein the body and the heel are formed of foamed polystyrene.

Images