JP2009274829A - Physical distribution reel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin physical distribution reel for enhancing rigidity against deflective deformation of a flange, while extremely restraining an increase in a resin quantity in a range housed in the same standard dimension as a conventional physical distribution reel. <P>SOLUTION: This injectably molded physical distribution reel 1 has a core 2 and a pair of diskoid flanges 3 arranged on its both ends, and is provided so that a spoke part 32 is arranged in the flanges 3 for extending toward the outer peripheral side from the core 2 side between a window opening 31 of a plurality of places, and the peripheral edge of the spoke part 32 is surrounded by ribs 33 and 34 having the substantially equal thickness. A part except for the ribs 33 and 34 in the spoke part 32 is constituted of a thick part 41 having the thickness of not exceeding the ribs, a thickness changed part 42 for slantingly reducing the thickness toward the outer peripheral side from the thick part 41, and a thin part 43 continuing with the outer edge of the thickness changed part 42. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to tapes such as TAB (Tape Automated Bonding) tape, carrier tape, spacer tape, etc. used for mounting, transporting, and storing electronic components and semiconductors, or other various belts, lines, or chains. In relation to logistics reels that are used for the transportation and management of such flexible long objects, and for delivery work, etc., particularly in logistics reels formed by injection molding of synthetic resin materials, The present invention relates to an injection-molded physical distribution reel configured to increase the rigidity of a flange while maintaining predetermined standard dimensions.

  Note that the physical distribution reel in the present invention is an expression for clarifying that it is a reel mainly used for industrial purposes, as distinguished from a fishing reel or a spool reel.

  A general distribution reel used for winding a long object includes a substantially cylindrical core as a winding core and a pair of disk-shaped flanges provided at both ends of the core.

  When winding or unwinding long objects, the center of the core is attached to the spindle of various devices to position the reel, and the length of the long object being wound or unwound is the length of both flanges. Be regulated between. Therefore, the standard dimensions of the product include the maximum axial length of the core that defines the positional relationship between the reel body and the support shaft, the opposing distance between the flanges that regulate the length in the width direction of the long object, The effective diameter of the flange that regulates the amount of winding (a value obtained by subtracting the core diameter from the overall diameter of the flange) is important.

Of these types of physical distribution reels, especially for resin reels formed by injection molding of synthetic resin material, it is practical to save as much weight and cost as possible by saving as much as possible the synthetic resin material required for molding. It is required to ensure a sufficient strength. Therefore, as disclosed in Patent Documents 1 and 2, for example, conventional resin reels make the flange as thin as possible and form a plurality of window openings in the flange, with a core between the window openings. It is common to provide a spoke part that extends from the outer side to the outer peripheral side, while forming a thick rib on the outer peripheral edge of the flange and the side edge of the spoke part to increase the rigidity against bending deformation of the flange It was the target.
JP-A-7-165369 JP-A-7-291538

  Synthetic resin reels of the above shape are also widely used for reels that wind up TAB tape, carrier tape, spacer tape, etc. used for mounting, transporting, and storing electronic components. Due to demands in the process and the like, higher dimensional accuracy has been required for the reel itself. In particular, with flanges, when the opposing spacing near the outer peripheral edge expands or contracts due to the bending deformation, the tape feeding position fluctuates in the width direction, reducing the mounting accuracy of electronic components, and increasing the friction between the tape and the flange. Further, since the tape is violated due to the resistance, and fine wear debris caused by friction causes contamination, a higher level of rigidity is required than before.

  However, simply increasing the wall thickness or reducing the size of the window opening to increase the rigidity of the flange will increase the amount of resin required for molding, leading to an increase in product cost and weight. Become. In recent years, the cost of raw materials for synthetic resins has also risen, so there is a situation where it is desired to suppress the increase in the amount of resin as much as possible.

  In addition, in existing component mounting lines, a considerable amount of physical distribution reels that conform to predetermined standard dimensions are continuously used, and the shape and dimensions of the reels used in the mounting lines can be easily changed. Can not. Therefore, there is also a situation in which it is basically desired to improve only the strength of a necessary portion while maintaining the same standard dimensions (maximum axial length of the core, opposed spacing of the flange, effective flange diameter, etc.) as before.

  The present invention has been made in view of the above circumstances, and within a range that fits within the same standard dimensions as a conventionally used distribution reel, while suppressing the increase in the amount of resin as much as possible, An object of the present invention is to provide a physical distribution reel made of synthetic resin with increased rigidity against bending deformation.

In order to achieve the above-described object, the physical distribution reel of the present invention includes a core around which a long object is wound, and a pair of disk-shaped flanges provided at both ends of the core, and at least one of the flanges includes: A plurality of window openings and a plurality of spoke portions extending between the window openings from the core side toward the outer peripheral side are provided, and ribs of substantially equal thickness are formed on the peripheral edge portion of the spoke portions. In the distribution reel made of injection molding, the portion other than the rib in the spoke portion is a thick portion formed in the vicinity of the core with a thickness not exceeding the rib, and is inclined from the thick portion toward the outer peripheral side. Further, the present invention is characterized in that it is constituted by a changed thickness portion having a reduced thickness and a thin portion formed on the outer peripheral side continuously from the outer edge of the changed thickness portion.

  In the present invention, the “rib” is mainly for the purpose of increasing the rigidity of the flange, and in some cases including the purpose of increasing the fluidity of the resin during molding, the surface of the flange is radially, concentric, or any other suitable shape. It is a concept that includes large and small thickened parts that are formed. The rib is generally formed with a thickness larger than its width, but the width may be larger than the thickness depending on the design shape of the window opening and the spoke part. Detailed aspects are not limited.

  The present invention relates to the spoke part whose peripheral part is surrounded by such a rib, and the part other than the rib is thick on the core side, thin on the outer peripheral side, and inclined in the middle part from the core side to the outer peripheral side. It is configured to reduce the wall thickness. The thick part on the core side has the same thickness as the rib, but does not exceed the thickness of the rib. The thick part on the core side and the thin part on the outer peripheral side may each have a substantially uniform thickness, and gradually or stepwise from the core side toward the outer peripheral side within each region. You may be comprised so that it may become.

The dimensional ratio of each of the thick, deformed, and thin portions with respect to the overall effective diameter of the flange should be appropriately designed in consideration of the size and shape of the window opening, the width and arrangement of the ribs, etc. There is a rough guideline,
Thick part: Changed part: Thin part = 1 (± 0.25): 3 (± 0.25): 1 (± 0.25)
It is preferable that In this case, the dimension of the thick part and the dimension of the thin part may not be equal.

  According to this configuration, the thickness of the portion where the stress due to the bending deformation of the flange increases is increased, so that the rigidity of the flange can be improved efficiently even with a small amount of resin. Therefore, for example, compared to a configuration in which the entire flange is uniformly thickened or the size of the window opening is reduced, the rigidity can be improved more than equivalent while suppressing an increase in the amount of resin required for molding. .

  In the physical distribution reel of the present invention, the portion excluding the ribs in the spoke portion of the flange is thick on the core side, thin on the outer peripheral side, and thicker in the middle from the core side to the outer peripheral side. It is configured to reduce. In other words, an efficient cross-section design is made so that the thickness of the portion where the stress due to the bending deformation of the flange increases becomes larger.

  Therefore, for example, compared to a form in which the entire flange is uniformly thickened or a form in which the window opening is reduced, it is possible to improve the rigidity more than equivalent while suppressing an increase in the amount of resin required for molding. The ability to suppress the increase in the amount of resin naturally contributes greatly to weight reduction, improvement in production efficiency, cost reduction, and the like.

  Further, in the physical distribution reel of the present invention, since the portion other than the rib is partially thickened within the range not exceeding the height of the rib, it is determined by the height of the rib. Without changing the maximum thickness of the flange, the rigidity of the flange can be increased while maintaining a predetermined standard dimension. Therefore, the present invention can be suitably implemented even on an existing mounting line without particularly changing the setting of specifications related to reel mounting.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a front view of a physical distribution reel according to an embodiment of the present invention as viewed from the flange side, FIG. 2 is a side view of the same, and FIG. 3 is one side of the physical distribution reel shown in FIGS. It is the elements on larger scale which cut | disconnected this flange by the AA line in FIG. However, the partial enlarged cross-sectional view of FIG. 3 is drawn by enlarging the scale in the thickness direction three times the scale in the radial direction in order to make the thickness of the flange easy to understand.

  The illustrated physical distribution reel 1 is used by winding a TAB tape (not shown) for mounting electronic components, and has a substantially cylindrical core 2 having a winding width corresponding to the width of the tape. And a pair of flanges 3 projecting in a disk shape from both ends of the core 2. In this case, the core 2 and the flange 3 are integrally formed by injection molding of a synthetic resin material. However, in the present invention, both the flanges 3 and the core 2 may be integrally formed, or for example, a half and two-piece molded body in which the core 2 is divided into two may be used.

  A shaft hole portion 21 for attaching a support shaft of a mounting machine or the like is provided in the center portion of the core 2 so as to penetrate in the axial direction of the core 2. In the shaft hole portion 21, engaging portions 22 for meshing with a support shaft of a mounting machine or the like are projected at four positions with a central angle of 90 degrees.

  Four connecting ribs 23 having a substantially U-shape in front view are formed outside the shaft hole portion 21, and a cylindrical drum portion 24 is concentric with the shaft hole portion 21 outside the connecting rib 23. Is formed. The shaft hole portion 21, the connecting rib 23, and the drum portion 24 are all uniform in thickness (the maximum outer dimension in the axial direction).

  The flange 3 is formed integrally with the core 2 so as to protrude from both ends of the drum portion 24. Both flanges 3 according to the illustrated embodiment have the same shape, and the inner side surfaces facing each other are smooth surfaces without irregularities. The flange 3 is provided with three substantially fan-shaped (or rice ball-shaped) window openings 31 in a front view. Between these window openings 31, a radial or substantially fan shape is formed from the core 2 side to the outer peripheral side. Three spoke portions 32 extending are formed.

  The flange 3 is formed with outer peripheral ribs 33 that are substantially equal in width along the outer peripheral edge and radial ribs 34 that extend radially from the peripheral edge of the core 2. Further, an arc-shaped rib 35 that partially forms a triple concentric arc inside the outer peripheral rib 33, a plurality of short ribs protruding from the periphery of the core 2, protruding ribs 36, and curved ribs constituting both shoulder portions of the window opening 31 37 etc. are also formed. As shown in FIG. 3, all of these ribs are unified to have a wall thickness whose top surface matches the outer end surface in the axial direction of the core 2. In addition, the shape of the illustrated flange 3 is an example, and in the present invention, both the flanges 3 do not necessarily have the same shape, and the shape of each rib can be appropriately modified.

  The main part of the present invention is that the spoke part 32 surrounded by the ribs as described above is composed of three regions of a thick part 41, a deformed part 42, and a thin part 43 in order from the core 2 side. is there.

  The thick portion 41 has substantially the same thickness as that of the outer peripheral rib 33 and the radiating rib 34, but does not exceed the thickness of the ribs. It is provided in a concentric arc-shaped region occupying about 1/5 to 1/3.

  The deformed portion 42 is a portion in which the thickness is gradually decreased from the outer edge of the thick portion 41 toward the outer peripheral side, and about 1/3 to 2/3 of the intermediate portion of the effective diameter of the flange 3. It is provided in a concentric arcuate region. The reduction rate of the thickness from the inner edge (thick portion 41 side) to the outer edge (thin portion 43 side) is set to about 1/2 to 1/3.

  The thin portion 43 is formed to have a substantially uniform thickness continuously to the outer edge of the deformed portion 42, and has an arc shape that occupies about 1/5 to 1/3 of the outer peripheral side of the effective diameter of the flange 3. It is provided in the area.

  As a reference value, if the specific dimensions of the physical distribution reel 1 according to the exemplary embodiment are shown, the diameter of the flange 3 is 530 mm, the diameter of the core 2 is 105 mm, and the effective diameter of the flange 3 is 425 mm. 35 mm to 48 mm. And the thickness of each rib in the flange 3 is 5 mm, the thickness of the thick part 41 is 4 mm, and the thickness of the thin part 43 is 2.5 mm. Of course, this dimension is an example, and the diameter and thickness of each portion can be changed within a range not impairing the practical strength balance.

  Thus, the physical distribution reel 1 of the present invention is intended to increase the rigidity of the flange 3 by increasing the thickness of the flange 3 other than the rib, but the increased thickness exceeds the thickness of the rib. Therefore, the main standard dimensions of the conventional physical distribution reel 1 including the maximum axial length of the core 2 and the distance between the opposing flanges 3 can be maintained as they are.

  And, since the thickened portion is thick in the small diameter region on the core 2 side, thin in the large diameter region on the outer peripheral portion 33 side, and the middle portion thereof is configured so that the thickness changes in an inclined manner. The rigidity can be efficiently increased while minimizing the increment of the resin amount required for molding. And since such a cross-sectional design is adopted, for example, in a conventional logistics reel forming mold that has already been used, by engraving parts other than the ribs, It is also possible to manufacture a physical distribution reel with improved rigidity while using the same molding line as before.

FIG. 1 is a front view of a physical distribution reel according to an embodiment of the present invention as viewed from the flange side. FIG. 2 is a side view of the physical distribution reel shown in FIG. FIG. 3 is a partially enlarged cross-sectional view showing the thickness by cutting a flange on one side of the physical distribution reel of FIGS. 1 and 2 along the line AA in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Logistic reel 2 Core 3 Flange 31 Window opening 32 Spoke part 33 Outer part 41 Thick part 42 Change part 43 Thin part

Claims (1)

A core around which a long object is wound, and a pair of disc-shaped flanges provided at both ends of the core, and at least one of the flanges includes a plurality of window openings and a space between the window openings from the core side. In a distribution reel made of injection molding, in which a plurality of spoke portions extending toward the outer peripheral side are provided, and a rib of substantially equal thickness is formed on the peripheral portion of the spoke portion,
The portions other than the ribs in the spoke portion are a thick portion formed in the vicinity of the core with a thickness not exceeding the rib, and a changed thickness portion in which the thickness is gradually decreased from the thick portion toward the outer peripheral side. An injection-molded physical distribution reel comprising: a thin-walled portion formed continuously from the outer edge of the deformed portion on the outer peripheral side.

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