JPH07315695A - Wire rod wound synthetic resin bobbin - Google Patents

Abstract

PURPOSE:To enable a bobbin to be molded by a compact molding machine and easily economically produced by providing a plurality of reinforcing sheets positioned circumferentially at equal interval and fixed on both longitudinal ends to the outer peripheral part of a circular side plate. CONSTITUTION:At least a circular side plate 5 is constitutionally divided into a plurality of divisional side plate parts 50, so that a compact molding machine will suffice for molding the circular side plate while molding metal molds can be miniaturized to reduce the metal mold manufacturing cost. Also, reinforcing sheets are attached to the circular side plate 5 circumferentially at equal interval and fixed on both longitudinal ends to the outer peripheral part of the circular side plate 5, so that the reinforcing sheet will function as a tension support member. Thus, the reinforcing sheet itself can be composed of a thin plate material. Also, since the circular side plate is supported by the reinforcing sheet, the circular side plate 5 is thinned.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cable shipped from an electric wire manufacturer, or a bohine for winding wire rods such as cranes, winches, wire ropes used for elevators and welding rods.

[0002]

2. Description of the Related Art For example, a cable supplied from an electric wire maker to an electric power company is shipped wound on a bobbin. This shipping bobbin is basically composed of a cylindrical portion around which the cable is wound, and a pair of circular side plates attached to both ends of the cylindrical portion. The current situation is that it is made of wood.

[0003]

In accordance with the recent increase in the nature protection of wood and the like, it is considered that it will be necessary to use alternative materials in the future. As an alternative material,
If moldability is taken into consideration, it is preferable to adopt a synthetic resin.

However, when the bobbin is made of synthetic resin, a large-sized molding machine corresponding to the size of the bobbin is required and the price of the die becomes expensive. Therefore, an object of the present invention is to provide a synthetic resin bobbin for winding a wire rod, which bobbin can be made by a small molding machine. A further object of the present invention is to provide a synthetic resin bobbin for winding a wire rod that is as lightweight as possible.

[0005]

In order to achieve such a technical object, in a wire rod winding synthetic resin bobbin of the present invention, a synthetic resin cylindrical portion around which a cable is wound, and the cylindrical portion A pair of circular side plates made of synthetic resin attached to both ends of the portion, and at least the circular side plates of the cylindrical portion and the circular side plates are divided at equal angular intervals in the circumferential direction. The pair of circular side plates is additionally provided with a reinforcing thin plate having a length dimension substantially the same as the diameter of the circular side plates and extending in the diametrical direction, and the reinforcing thin plates are equally spaced in the circumferential direction. A plurality of these reinforcing thin plates are fixed to the outer peripheral portion of the circular side plate at both ends in the longitudinal direction thereof.

If the cylindrical portion has a desired diameter, a commercially available synthetic resin pipe may be used, cut into a predetermined length and used as it is, or a circular side plate and Similarly, it may be composed of divisional components divided at equal angular intervals in the circumferential direction.

The pair of circular side plates and the cylindrical portion may be connected to each other by fitting the ends of the cylindrical portion into a groove formed in the inner surface of the circular side plate and extending continuously in the circumferential direction. According to this, the cylindrical portion and the circular side plate are detachably coupled.

Although the position of the reinforcing thin plate is arbitrary, if the reinforcing thin plate is arranged along the boundary between the adjacent divided component parts of the circular side plate, the reinforcing thin plate connects the divided component parts. It will have a reinforcing role.

In a preferred embodiment of the present invention, the reinforcing thin plate, the cylindrical portion, and the circular side plate are respectively detachable, and the divided constituent parts are separable from each other.

[0010]

According to the present invention, since at least the circular side plate is divided into a plurality of divided components, a compact molding machine can be used for molding this, and a compact molding die can be used. Therefore, the die manufacturing cost can be reduced.

Further, since reinforcing thin plates are attached to the circular side plate at equal intervals in the circumferential direction, and these reinforcing thin plates are fixed to the outer peripheral portion of the circular side plate at both longitudinal ends thereof.
The reinforcing thin plate will function as a tensile support member. Therefore, the reinforcing thin plate can be composed of a thin plate material itself. Further, since the circular side plate is supported by the reinforcing thin plate, the circular side plate can be thinned.

When the reinforcing thin plate, the cylindrical portion and the circular side plate are made detachable and the divided constituent parts can be separated for each constituent part, the used bobbin can be recovered in a disassembled state. It can be transported and the recovery cost can be reduced.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment (FIGS. 1 to 12) FIG. 1 is a side view of a bobbin of an embodiment, which is used by a wire manufacturer for shipping cables. The bobbin 1 is composed of a synthetic resin cylindrical portion 3 around which a cable (not shown) is wound, and circular synthetic resin side plates 5 and 5 attached to both ends of the cylindrical portion 3. One side plate 5 and the other side plate 5 are integrated by using a long threaded rod extending in the axial direction and nuts screwed to both ends thereof. Further, the cylindrical portion 3 and the side plate 5 both have a divided structure divided in the circumferential direction.

Various kinds of bobbins 1 for shipping cables are prepared, which have different sizes. An example thereof is as follows. Diameter of the circular side plate 5: 800 mm Outer diameter of the cylindrical part 3 D2: 350 mm Shaft hole diameter of the cylindrical part 3 D3: 50 mm Inner width W between both side plates 5, 5: 300 mm Plate thickness T of the side plate 3: 40 mm

2 to 5 show a divided side plate component 50 constituting the side plate 5. The side plate component 50 holds the side plate 5 at 90 °.
It has a fan-shaped overall shape divided into four at intervals, and as shown in FIG. 2, a flange 501 that forms the contour of the component 50 and a plurality of ribs 502 are formed on the outer surface thereof. It extends radially or circumferentially.

On the outer side surface of the side plate component 50, in the middle portion in the radial direction, an arcuate thick portion 505 extending from one end to the other end in the circumferential direction, and a central portion in the longitudinal direction of the arcuate thick portion 505. From the vertical thick portion 50 extending slightly inward from the radial direction
6 are formed, and the vertical thick portion 507 ends with a boss 508. The boss 508 is formed with a through hole 508a into which the screw rod 7 is inserted.

The side plate component 50 has an ear 50 protruding outward at one end in the circumferential direction (on the left side in the plane of FIG. 2).
9 is formed, and on the other hand, a slot 510 for receiving the ear 509 is formed at the other end of the side plate component 50 (on the right side in the plane of FIG. 2). The ears 509 and the slots 510 have an elongated shape that extends in the radial direction, and are provided with two bolt insertion holes 511 that are spaced apart in the radial direction. Further, two through holes 512 are formed in the outer peripheral portion of the side plate component 50 in the circumferentially intermediate portion thereof at intervals. The through hole 512 is used for fixing a reinforcing iron thin plate 13 described later.

FIG. 3 is a rear view of the side plate component 50. A first arcuate groove 520 extending in the circumferential direction is formed on the outer peripheral portion of the inner surface of the side plate component 50.
At both ends in the circumferential direction, inlets 520a that open to the outer peripheral edge of the side plate component 50 are formed. This entrance 5
20a and the first arcuate groove 520 are for a cover (not shown), and the cover is inserted into the groove 520 from an arbitrary inlet 520a after winding the cable around the bobbin 1.

On the inner side surface of the side plate component 50, at a position corresponding to the above-mentioned arcuate thick portion 505 (see FIG. 2),
A second arcuate groove 522 extending in the circumferential direction is formed, and a vertical groove extending slightly inward in the radial direction from the second arcuate groove 522 at a position corresponding to the vertical thick portion 506 (see FIG. 2). 523 is formed.

6 and 7 show a divided cylindrical part 30 which constitutes the cylindrical portion 3. FIG. 6 is an end view of the split cylindrical component 30, and FIG. 7 is a view of the split cylindrical component 30 seen from the direction of arrow VII shown in FIG. The divided cylindrical part 30 has a curved shape of a quarter circle in which the cylindrical part 3 is divided at 90 ° intervals, corresponding to the side plate part 50.
End ribs 301 that extend in the circumferential direction are formed at both ends in the axial direction on the inner side surface of the, and projections 303 that project outward in the axial direction are formed in the middle portions of the respective end ribs 301. There is. Further, on the inner side surface of the divided cylindrical component 30, two reinforcing ribs 305 extending in parallel to each other in the axial direction are formed at the central portion in the circumferential direction.

FIG. 8 shows a modified example of the divided cylindrical part 30. In the split cylindrical part 30 shown in FIG.
The inner surface has a rib 307 provided at the center in the circumferential direction, and the rib 307 extends to the full extent in the axial direction.
Both ends of this rib 307 have the same function as the above-mentioned projection 303. The ends of the ribs 307 and the protrusions 30
The function of 3 will be described later.

To assemble the cable bobbin 1, first, the side plate 5 is assembled, then the cylindrical part 30 is assembled to the side plate 5, the screw rod 7 is inserted between the side plates 5 and 5, and the nuts are tightened from both sides. Reinforcing iron thin plate 13 to side plate 5
It is carried out by attaching to. The details will be described below.

Assembling of the side plate 5 is performed by adjoining the side plate component 50.
This is done by sequentially connecting each other. The adjacent side plate component 50 has the ears 509 of the one side plate component 50 inserted into the slots 510 of the other side plate component 50 to form the slot 51.
The ears 510 inside 0 are fixed by a fastener 530 (see FIG. 4) made up of bolts and nuts inserted in the bolt insertion holes 511, so that the ears 510 are connected. In the connection of the adjacent side plate components 50, in order to reinforce them, a plate material (for example, an iron plate) extending between the two side plate components 50 is additionally provided, and this plate material is attached to both side plate components 50, respectively. You may make it fix using a bolt and a nut.

The assembling of the cylindrical component 30 to the side plate 5 assembled in this way is carried out by fitting the cylindrical member 30 into the groove 522 which extends continuously in the circumferential direction on the inner surface of the side plate 5. The cylindrical member 30 is positioned by aligning the projection 303 formed on the cylindrical member 30 with the vertical groove 523 and fitting the same into the vertical groove 523.

The reinforcing iron thin plate 13 has the same length dimension as the diameter of the side plate 5, and as shown in FIGS. 9 and 10, has bent portions 130 bent at 90 ° at both ends in the longitudinal direction. ing. With respect to the bent portion 130, the side plate component 50 has a recess 525 in the center of the flange 501 at the outer peripheral edge thereof.
When the thin plate 13 is mounted, the recess 5 is formed.
The mounting work is performed by inserting the bent portion 130 into the 25. The reinforcing iron thin plate 13 also has a hole 131 corresponding to the through hole 512 of the side plate component 50, and the fixing to the side plate 5 is performed using this hole 131. That is, after the side plate 5 is assembled, the thin plate 13 is formed into two thin plates 1.
3, the thin plates 13 are arranged in a cross shape, and the thin plates 13 are stretched in the diametrical direction as shown in FIG.
2 is fixed to the side plate parts 50, 50 facing each other by a fastener composed of a bolt and a nut.

The winding start and end of the cable for the assembled bobbin 1 may be stopped as follows. 11 and 12 show a stop means at the beginning and end of winding of the cable. FIG. 11 is a front view schematically showing the side plate component 50. Circumferentially extending elongated holes 532 are formed in the inner peripheral portion and the outer peripheral portion of the side plate component 50, respectively, and the ribs 502 extending radially are provided with two notches 533 in the outer peripheral portion and the inner peripheral portion, respectively. Are formed. In FIG. 11, these notches 533 have common ribs 502.
The two notches 5 on the outer peripheral portion are shown in the figure.
33 and the two notches 533 on the inner peripheral portion may be provided on the ribs 502 adjacent to the corresponding elongated holes 532, respectively. Also,
The rib 502 provided with the notch 533 is not limited to a rib extending radially, but may be a rib extending in the circumferential direction.

When such a cable end locking means is provided on the side plate component 50, as shown in FIG. 11, the winding start end C-1 of the cable C is pulled out from the elongated hole 532 in the inner peripheral portion to the outside. , As shown in FIG. 12, set the winding start end C-1 to 2
It suffices to engage the two notches 533. Similarly, the winding end C-2 of the cable C may be pulled out to the outside from the elongated hole 532 of the outer peripheral portion, and the end C-2 may be locked to the two notches 533 adjacent to each other. Slot 532 and notch 5
The size of 33 may be determined in consideration of the size of the bobbin 1 and the thickness (diameter) of the cable C.

In the above structure, the cylindrical portion 3 around which the cable is wound and the side plates 5 attached to both ends thereof have a divided structure, and the divided parts 30 and 50 are miniaturized. A large number of small molding machines available on the market can be used without using a large molding machine, and a small mold can be used, so that the mold manufacturing cost can be reduced. In addition, the bobbin 1 around which the cable C is wound
Against the deformation of the bobbin 1 itself, that is, the cylindrical part 30 and the side plate part 50, the reinforcing thin plates 13 arranged in a cross shape with respect to the side plate 5 function as a pulling support member.
Even if the wall thickness is reduced or the reinforcing thin plate 13 is reduced, the function as the bobbin 1, that is, the cable bobbin without deformation can be used. In other words, when the reinforcing thin plate 13 is used as the compression member, the thickness of the thin plate 13 needs to be a thickness that can withstand this, and as a result, the weight of the bobbin 1 increases.

Further, since the bobbin 1 is assembled with the fastener composed of the bolt and the nut, the bobbin 1 can be easily disassembled when the bobbin 1 is collected.
Therefore, there is a great practical advantage that a large number of bobbins 1 can be loaded on the vehicle for collection. In addition, even if some of the recovered parts are lost, each divided part has a structure in which it is divided at equal angular intervals, so it is possible to easily deal with it by simply preparing spare parts. . Further, when the cable end locking means shown in FIGS. 11 and 12 is provided, the work of stopping the winding start end and the terminal end of the cable can be simplified.

The drawings after FIG. 13 show other embodiments of the present invention, and in the description of these embodiments, the same reference numerals are given to the elements common to the first embodiment and each embodiment. The description thereof will be omitted as appropriate, and the characteristic part of each embodiment will be described below.

Second Embodiment (FIGS . 13 to 15) The embodiment shown in FIG. 13 shows another connecting means for adjoining side plate parts 50 with respect to the first embodiment. In this embodiment, a plurality of circular protrusions 540 protruding outward are formed at one end in the circumferential direction of the side plate component 50, and a recess 541 having a position and shape corresponding to the protrusions 540 is formed at the other end. Then, the adjacent side plate components 50 are coupled to each other by fitting the protrusions 540 of the one side plate component 50 into the recesses 541 of the other side plate component 50. The shapes of the protrusion 540 and the recess 541 are arbitrary as long as they can be fitted in a concavo-convex shape.
The shape may be as shown in FIG.

Third Embodiment (FIGS. 16 to 18) This embodiment shows another connecting means for adjoining side plate parts 50 with respect to the first and second embodiments. In this embodiment, a plurality of first ears 543 are formed at one end of the side plate component 50 in the circumferential direction, and a second ear 544 having the same shape as this is formed.
Is formed at the other end of the side plate component 50, and the first ear 543 and the second ear 544 are offset in the thickness direction of the side plate component 50. Bolt insertion holes 545 are formed in the first ears 543 and the second ears 544 at positions corresponding to each other, and the adjacent side plate components 50 are coupled to each other by connecting the first ears 543 of the one side plate component 50 to the other. It is performed by overlapping the second ears 544 of the side plate component 50 of the above and fixing the first and second ears 543 and 544 to each other by the fastener 530 formed of the bolt and the nut inserted into the bolt insertion hole 545. . Although the shape of the first and second ears 543 and 544 is circular in FIG. 16 showing this embodiment,
The shape is not necessarily limited to this, and may be rectangular, for example.

Fourth Embodiment (FIGS. 19 to 21) This embodiment shows another connecting means for adjoining side plate parts 50 with respect to the first to third embodiments. In this embodiment, at one end of the side plate component 50 in the circumferential direction,
A pair of ears 550, 551 spaced from each other in the thickness direction is formed, and one ear 552 of the same shape as this is formed at the other end of the side plate component 50. The adjacent side plate components 50 are coupled to each other by inserting the ears 552 of the other side plate component 50 into the slots 553 formed by the pair of ears 550 and 551 of the one side plate component 50 and inserting the side plate components 50 into the bolt insertion holes 545. This is done by fixing these ears 550, 551, 552 with a fastener 530 composed of the bolts and nuts.

Fifth Embodiment (FIGS. 22 and 23) This embodiment shows a modification of the shape and arrangement of the reinforcing thin plate 13. The reinforcing thin plate 13 in the present embodiment is formed of a rectangular flat plate, and is arranged along the connecting portion between the adjacent one side plate component 50 and the other side plate component 50, as shown in FIG. . According to this embodiment, there is an advantage that the adjacent side plate components 50 can be joined together by the reinforcing thin plate 13. Note that FIG. 23 is a cross-sectional view taken along line X23-X23 in FIG. 22, and reference numeral 555 shown in the figure denotes a fastener composed of a bolt and a nut. It goes without saying that the shape and arrangement of the reinforcing thin plate 13 of this embodiment can be applied to the first to fourth embodiments.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments and includes the following modifications. (1) The side plate component 50 may be the side plate 5 divided at equal angular intervals in the circumferential direction, for example, may be divided into six at 60 ° intervals, and eight at 45 ° intervals. It may be divided into. (2) For the cylindrical portion 3, depending on the size of the bobbin 1, for example, a commercially available synthetic resin pipe may be cut to a predetermined length and used as it is without dividing it in the circumferential direction. Alternatively, the cylindrical portion 3 may be divided at the same angular intervals as the side plate 5.

[0036]

As is apparent from the above description, according to the present invention, even if a synthetic resin bobbin is manufactured as a substitute for the conventional wooden bobbin, a small molding machine can be used. Since the molding die can be downsized, the manufacturing is easy and the cost can be reduced. Further, since the reinforcing thin plate attached to the side plate of the bobbin functions as a pulling support member, the reinforcing thin plate itself can be thinned, and the entire bobbin can be thinned, so that the material cost can be reduced. And the overall weight of the bobbin can be reduced.

[Brief description of drawings]

FIG. 1 is a side view of an entire cable bobbin according to an embodiment of the present invention.

FIG. 2 is a front view of a divided side plate component of the first embodiment configured by dividing the side plate of the bobbin.

FIG. 3 is a rear view of the split side plate component of FIG.

FIG. 4 is a side view of the divided side plate component seen from the arrow IV side in FIG.

5 is a side view of the divided side plate component seen from the arrow V side in FIG.

FIG. 6 is an end view of a divided cylindrical part configured by dividing the cylindrical portion of the bobbin.

7 is a view of the split cylindrical part shown in FIG. 6 viewed from the arrow VII side in FIG.

FIG. 8 is an end view showing a modified example of the divided cylindrical part, corresponding to FIG. 6;

FIG. 9 is a partial front view of a reinforcing thin plate.

FIG. 10 is a cross-sectional view of the reinforcing thin plate taken along line X10-X10 in FIG.

FIG. 11 is a schematic front view of a divided side plate component showing a means for locking a winding start end and a winding end of a cable.

FIG. 12 is an enlarged explanatory view showing a concrete locked state of a winding start end and a cable winding end.

FIG. 13 is an exploded front view of the split side plate component according to the second embodiment.

FIG. 14 is a partially enlarged view showing a modified example of the coupling means in the split side plate component of the second embodiment.

FIG. 15 is a partially enlarged view showing another modification of the coupling means in the split side plate component of the second embodiment.

FIG. 16 is an exploded front view of the split side plate component according to the third embodiment.

FIG. 17 is a side view of the divided side plate component seen from the direction shown by arrow X17 in FIG.

FIG. 18 is a side view of the divided side plate component seen from the direction shown by arrow X18 in FIG.

FIG. 19 is an exploded front view of the split side plate component according to the fourth embodiment.

20 is a side view of the divided side plate component seen from the direction shown by arrow X20 in FIG.

FIG. 21 is a side view of the divided side plate component seen from the direction shown by arrow X21 in FIG.

FIG. 22 is a front view of a side plate showing a modified example such as an arrangement of reinforcing iron thin plates.

23 is a cross-sectional view of a side plate cut along the line X23-X23 in FIG. 22 and a reinforcing iron thin plate attached to the side plate.

[Explanation of Codes] 1 bobbin for cable 3 cylindrical part 5 side plate 13 thin iron plate for reinforcement 30 split cylindrical part 50 split side plate part 512 fastening bolt insertion hole 522 groove

Claims (5)

[Claims] 1. A synthetic resin cylindrical part around which a cable is wound, and a pair of circular side plates made of synthetic resin attached to both ends of the cylindrical part, respectively. Among them, at least the circular side plate is composed of divided components that are divided at equal angular intervals in the circumferential direction, the pair of circular side plates are provided with a length dimension substantially the same as the diameter of the circular side plate in the diametrical direction. An extending reinforcing thin plate is additionally provided, and a plurality of the reinforcing thin plates are provided at equal intervals in the circumferential direction,
A bobbin made of synthetic resin for winding a wire rod, characterized in that the reinforcing thin plates are fixed to the outer peripheral portion of the circular side plate at both longitudinal ends thereof. 2. The cylindrical portion and the circular side plate are both divided at equal angular intervals in the circumferential direction.
A synthetic resin bobbin for winding a wire rod according to. 3. The circular side plate is formed with a groove continuously extending in a circumferential direction on an inner surface thereof, and an end portion of the cylindrical portion is fitted in the groove. Item 3. A synthetic resin bobbin for winding a wire rod according to item 2. 4. The wire rod winding according to claim 1, wherein the reinforcing thin plate is arranged along a boundary between the adjacent divided component parts of the circular side plate. Recycled synthetic resin bobbin. 5. The reinforcing thin plate, the cylindrical portion, and the circular side plate are detachable from each other, and the divided component parts are separable from each other. 4. The bobbin made of synthetic resin for winding a wire rod according to any one of 4 above.