JP2009137620A - Tightly fastening band for fitted lid of can and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide means that enables remarkable cost reduction without degrading original performance of a tightly fastening band for a fitted lid of a can. <P>SOLUTION: The tightly fastening band includes: an open annular band body 1 with a mountain-shaped cross-section, which receives the peripheral edge 7a of an opening of a can body 7 and the peripheral edge 8a of a lid plate 8a so that they are superposed on each other, and a tightly fastening device that pulls both ends of the band body 1 toward each other. The band body 11 is formed from a piece obtained by roll-forming a strip 10a made by cutting a galvanized steel sheet. A rust prevention coating is formed on the edge faces 11a of both sides of the band body 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention is a so-called open can whose upper end side is fully open, a metal fitting lid tightening band used for fixing a lid plate fitted to the opening of the can body, It relates to the manufacturing method.

  1 and 2 show a bolt tightening type which is a typical one of this type of tightening band. The bolt tightening type tightening band 1 has a δ-shaped tightening tool mounting brackets 12, 12 fixed to both ends of a band body 11 having an angled cross section and an open ring shape, and a cylindrical portion of both mounting brackets 12, 12. Bolts 13 are inserted into 12a and 12a and screwed into nuts 14. In its use, for example, as shown in FIGS. 6 (A) and 6 (B), the opening peripheral edge 7a of the can body 7 of the open drum can D and the peripheral edge 8a of the lid plate 8 fitted in the opening are superposed. The portion was held in a headband shape by the band body 11, and the bolts 13 and nuts 14 passed through the fastener fittings 12 and 12 at both ends thereof were screwed and tightened to reduce the diameter by approaching both ends. The overlapped portion is fastened and fixed by the band body 11. In FIG. 6B, reference numeral 9 denotes a gasket made of rubber or the like interposed between the opening periphery 7 a of the can body 7 and the periphery 8 a of the lid plate 8.

  Therefore, as this type of tightening band, in addition to the bolt fastening type illustrated in FIGS. 1, 2, and 6, an inner lever type and an outer lever type are often used. The inner lever-type tightening band 2 shown in FIG. 3 has side-view-shaped fastener mounting brackets 22 and 23 fixed to both ends of the same band main body 21 as described above. A latch 24 is fixed at a position near the bracket 22, and an arc-shaped operation lever 25 is pivotally attached to the inwardly projecting piece 22a of one mounting bracket 22. The base side of the operation lever 25 and the other mounting bracket A link piece 26 is pivotally connected to the inwardly projecting piece 23a of 23, and the band main body 21 is reduced in diameter by attracting the operating lever 25 to the band main body 21 side and hooking it on the hook metal fitting 24. And tighten. 4 is a cross-sectional view in which bracket-type fastener mounting brackets 32 and 33 are fixed to the outer peripheral sides of both ends of a similar band main body 31 and pivotally attached to one mounting bracket 32. A link piece 35 is pivotally connected between the base side of the U-shaped operating lever 34 and the other mounting bracket 33, and the operating lever 34 is attracted to the band main body 31 side to lock the convex portion of the mounting bracket 32. By engaging with 32a, the band body 31 is reduced in diameter and tightened.

By the way, as this type of tightening band, it is necessary to have rust prevention performance corresponding to outdoor use and long-term repeated use, so stainless steel is used for each member including the band main bodies 11 to 31. Although it is also commercially available, on the other hand, it is also important to reduce the manufacturing cost as an inexpensive can body accessory. Therefore, generally, steel parts are used and electrogalvanized after assembly production. What was done is used a lot. However, various proposals (for example, Patent Documents 1 to 3) related to the improvement of the detailed structure have been made as such fastening band tightening bands, but most of the useful proposals from the viewpoint of cost reduction are found. I can't.
Japanese Utility Model Publication No. 56-10004 Japanese Utility Model Publication No. 57-177961 JP-A-6-298267

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide means for enabling a significant cost reduction without degrading the original performance as a tightening band for a fitting lid of a can body.

  If the means for achieving the above object is shown with reference numerals in the drawings, the fastening lid tightening band 1 for a can body according to claim 1 of the present invention has an opening peripheral edge 7a of the can body 7 and the rim 7a. A band main body 1 having an angled cross-sectional shape that holds the peripheral edge 8a of the cover plate 8 fitted in the opening in a superposed state, and is interposed between both ends of the band main body 1 to attract and tighten the both ends. The band main body 11 is made of a roll molded product of a band plate material 10a obtained by cutting a plated steel plate, and at least the edge surfaces 11a and 11a on both side edges of the band main body 11 are protected. A rust film is formed.

  The invention according to claim 2 is the fitting lid tightening band 1 according to claim 1, wherein the fastener mounting brackets 12, 12 that are punched from the plated steel plate and bent are fixed to both ends of the band body 11. A rust preventive film is formed on both end faces 11b, 11b in the longitudinal direction of the main body 11 and end faces 12b, 12b of the fastener mounting brackets 12, 12.

  According to a third aspect of the invention, in the fitting lid tightening band 1 of the first or second aspect, the plated steel plate is a hot dip galvanized steel plate.

  According to a fourth aspect of the present invention, in the fitting lid tightening band 1 according to any one of the first to third aspects, the rust preventive film is made of a wax-based aqueous emulsion type rust preventive coating agent.

  According to a fifth aspect of the present invention, in the fitting lid tightening band 1 of the fourth aspect, the rust preventive coating agent contains a wax emulsion and an acrylic resin emulsion.

  The method for manufacturing the tightening lid tightening band 1 according to the invention of claim 6 comprises applying and drying a rust-preventive coating agent on both side surfaces of the wound coil 10 of the long strip plate material 10a slit-cut from the plated steel plate. After forming the rust-preventing coating, the strip 10a is continuously fed out from the wound coil, the strip 10a is formed into a cross-sectional shape by roll molding, and then curled into an annular shape. The band plate material 10b is cut for each predetermined length to produce an open annular band body 11, and the fastener mounting brackets 12 and 12 are fixed to both ends of the band body 11 by resistance welding. .

  Next, the function and effect of the present invention will be described with reference numerals in the drawings. First, the fastening lid tightening band 1 according to the first aspect of the present invention uses a band plate material 10a obtained by cutting a plated steel plate in the band body 1, and thus does not require plating after assembly and manufacture. The cost can be greatly reduced, and the edge surfaces 11a and 11a on both side edges of the strip 10a become non-plated surfaces by cutting the plated steel sheet. However, since the anti-rust coating is formed on these non-plated surfaces, sufficient rust prevention is provided. Performance is ensured.

  According to the invention of claim 2, in addition to the both side portions of the band main body, the longitudinal end surfaces 11 b and 11 b of the band main body 11 and the fastener mounting brackets 12 and 12 fixed to the both end portions of the band main body 11 are provided. Since the rust preventive coating is also formed on the peripheral end faces 12b, 12b, a high rust preventive performance can be obtained even at a site where the operator touches with a gloves when attaching / detaching the tightening band to / from the can body D.

  According to invention of Claim 3, since the plated steel plate used for the band main body 1 is a hot dip galvanized steel plate, it can obtain easily and can reduce material cost more, and sufficient rust prevention performance as a plated steel plate is obtained.

  According to invention of Claim 4, since said rust preventive film is comprised with the coating film of a wax-type water-emulsion type rust preventive coating agent, the more outstanding rust preventive performance is exhibited.

  According to invention of Claim 5, since said rust preventive coating agent contains a wax emulsion and an acrylic resin emulsion, the especially outstanding rust prevention performance is exhibited.

  In the manufacturing method of the fastening lid tightening band 1 according to the invention of claim 6, the band body 11 is manufactured from the long strip plate material 10a slit-cut from the plated steel plate, and both sides which become non-plated surfaces by the slit cutting are produced. Since the antirust coating is formed on the edge surfaces 11a and 11a of the edge, the manufacturing cost can be greatly reduced as compared with the case where the band main body 11 is subjected to the plating treatment after the assembly production. Since the formation is performed at the stage of the winding roll 10 of the long strip plate material 10a before roll forming, the band main body 11 can be provided with extremely excellent rust prevention performance.

  The tightening band for the fitting lid to which the present invention is applied is a so-called open can as shown in FIG. The band main body is used to fix the cover plate, and is held in a superposed state by holding the peripheral edge of the opening and the peripheral edge of the can body in a superposed state, and between both ends of the band main body. There is no limitation on the tightening method, and it is only necessary to have a tightening tool that interposes the both ends and tightens the both ends, and a bolt tightening mold as shown in FIGS. The inner lever type as shown in FIG. 4 and the outer lever type as shown in FIG. 4 may be used, and other tightening methods are also included. In addition, the cross-sectional mountain shape of the band body is a general term for a cross-sectional shape that opens to one side, and includes a V shape, a U shape, a C shape, a dogleg shape, a semicircular shape, a trapezoid with a bottom side open, and the like.

  Accordingly, the tightening band for the fitting lid of the present invention is a roll molded product of a band plate material in which the band main body cuts the plated steel plate, and at least the rust preventive coating on the edge surface which is the non-plated surface on both side edges of the band main body. Since it does not require electrogalvanization after assembly and production, the production cost can be greatly reduced, and the anticorrosive coating is provided on both sides of the band body that will be the non-plated surface. As a whole, it exhibits sufficient rust prevention performance.

  The plated steel sheet used for the band body is not particularly limited, but a hot dip galvanized steel sheet is recommended from the viewpoint of economy and rust prevention performance. In addition, the component members of the fastener, the fastener fittings for attaching the fasteners to the band body, and the latches are also members that can be manufactured by punching or bending metal plates in form. It is desirable to use a hot-dip galvanized steel sheet as a raw material and provide a similar rust preventive coating on a non-plated surface produced by punching or cutting.

  The anticorrosive coating agent used for forming the anticorrosive film is not particularly limited, but a wax-based aqueous emulsion type is preferred from the viewpoint of the affinity to the non-plated surface of the plated steel sheet and the anticorrosive performance. An aqueous emulsion type containing a resin emulsion is preferred. Further, the rust preventive coating may contain calcium carbonate, magnesium carbonate, barium sulfate, alumina, silica, mica, talc, diatomaceous earth, kaolin and the like as fillers. Therefore, the thickness of the anticorrosive film is preferably in the range of about 1 to 50 μm in terms of dry film thickness. Since zinc rich paint contains zinc powder at a high concentration, it has high rust prevention capability, but it is expensive and the zinc powder tends to settle in the paint, so it is a narrow area such as the side end face of the band body. However, it is difficult to form a uniform film.

  In the aqueous emulsion type rust preventive coating agent containing a wax emulsion and an acrylic resin emulsion, the solid content is 5 to 30% by weight of the wax emulsion, 30 to 70% by weight of the acrylic resin emulsion, and 10 to 50% of the filler. What has a composition containing in the range of weight% is preferable. The wax emulsion preferably has a melting point of the wax component of about 40 to 80 ° C. The acrylic resin emulsion is a homopolymer or copolymer of (meth) acrylic acid ester, or a copolymer of (meth) acrylic acid ester and another ethylenic monomer, and has a glass transition point. It is recommended that the emulsion particles have an average particle size of about 10 to 100 nm or less at 0 ° C. or less. Thus, as a suitable commercially available product of such a wax-based aqueous emulsion type rust preventive coating agent, there is a trade name NOX-RUST W-134 manufactured by Parker Kosan Co., Ltd.

  In order to manufacture such a tightening band for a fitting lid, first, as shown in FIG. 5, a pinch roll 40 is formed from a wound coil (uncoiler) 10 of a long strip plate material 10a slit-cut from a plated steel plate. The strip 10a is continuously fed out and passed between the roll pairs 4a of the roll forming section 4 to form the strip 10a into a cross-sectional chevron, and then required by the forming roll 5a of the curl forming section 5. While curling into a substantially circular shape with a diameter, the band body is produced by cutting with a cutter 6 for each length immediately before the curled product 10b is closed, but the winding coil 10 stage, the winding coil 10 in the molding stage from the band plate material 10a to the curled molded product 10b, or the curled molded product 10b after the cutting, on the non-plated surface that becomes the both side edges of the band main body. By applying a grayed agent to form a rust preventing film.

  Fastener mounting brackets are fixed to both ends of the manufactured band main body, and each member of the fastener or latching bracket is attached to the outer lever type or inner lever type tightening band. If there is a non-plated surface made of steel plate by punching or cutting, the non-plated surface at both ends by cutting after the curl molding of the band body is also applied, and a rust-preventive coating agent is applied to these non-plated surfaces Form. That is, both ends of the band main body, the fastener mounting bracket, each member of the fastener, the latch bracket, and the like are parts that the operator touches with the gloves when attaching and detaching to the can body D. Having a plated surface with excellent rust prevention performance leads to high commercial value.

  The anti-corrosion coating agent can be applied to the non-plated surface that forms the side edges of the band body at any of the stages described above. It is recommended to perform molding after the coating film is dried or to apply after forming the band body. This is because when a rust preventive coating agent is applied at the molding stage, a large amount of oil is applied to the uncured rust preventive film or a strong air jet pressure is applied to the rust preventive film. Because it is easy to be done.

  Note that it is recommended that attachment of the fastener mounting bracket, each member of the fastener, the latch bracket, etc. to the band main body is performed by resistance welding such as projection welding. This is because in resistance welding, heat generation is concentrated only in the contact portion between the members in a very short time, so that the weld can be efficiently welded with almost no discoloration. Thus, although resistance welding cannot be applied to a surface provided with a thick coating film such as an antirust coating, resistance welding can be performed without any problem if the band body is a plated steel plate as in the present invention.

  Examples of the present invention and comparative examples will be described below with reference to the bolt tightening type tightening band 1 shown in FIGS.

Example 1
Wax-based water-based emulsion-type anti-corrosion coating on both sides of a wound roll of 44 mm long strip-shaped material slit-cut from a 2 mm thick hot-dip galvanized steel sheet (standard SGHC, basis weight Z08 = 80 g / m ² Min) An agent (above, NOX-RUST W-134) was applied with a brush and dried at room temperature for 12 hours to form a rust-preventing film having a dry film thickness of about 5 μm. And this winding roll is set as an uncoiler, and as shown in FIG. 5, it roll-forms in cross-section substantially V-shape in the roll forming part 4 while drawing | feeding out this strip | belt-shaped material 10a from this winding roll 10 continuously. Next, the curl forming part 5 is curled into a circular shape with a diameter of about 600 mm, cut with a cutter 6, and the obtained band body 11 is punched and bent from the same hot-dip galvanized steel plate at both ends. After the metal fitting 12 (expanded length 115 mm, width 24 mm, inner diameter 16 mm of the cylindrical portion 12 a) is fixed by projection welding, it is attached to the longitudinal end surfaces 11 b of the band body 11 and the peripheral end surface 12 b of the mounting metal 12. Similarly, a rust preventive coating agent was applied to form a rust preventive coating film, and a bolt tightening type tightening band was manufactured.

Example 2
A band main body obtained by setting a winding roll 10 of a long strip-like material slit-cut from a hot-dip galvanized steel sheet as in Example 1 as an uncoiler and performing roll forming, curl forming and cutting in the same manner as in Example 1. 11 is fixed to the fastener mounting bracket 12 by projection welding at both ends thereof, and then the edge surfaces 11a and 11a on both side edges of the band main body 11 and both longitudinal end surfaces 11b and 11b and the fastener mounting bracket 12 are fixed. A rust preventive coating agent similar to that of Example 1 was applied to the peripheral end face 12b to form a rust preventive coating film having a dry film thickness of about 5 μm, thereby producing a bolt tightening type tightening band.

Example 3
Except for using a trade name NOX · RUST X-194 (commercially available as a rust preventive oil for pipe ends of agricultural greenhouses) as a rust preventive coating agent and forming a rust preventive film with a dry film thickness of about 1 µm. In the same manner as in Example 1, a bolt tightening type tightening band was produced.

Example 4
Zinc rich paint (trade name Keigin Co., Ltd. made by Toupe Co., Ltd., marketed as an external repair paint for galvanized can fuselage welds) was used as a rust-proof coating agent, except that a rust-proof film having a dry film thickness of about 20 μm was formed. A bolt tightening type tightening band was produced in the same manner as in Example 1.

Comparative Example A bolt tightening type tightening band was produced in the same manner as in Example 1 except that the antirust coating agent was not applied.

Reference Example A bolt tightening type tightening band was manufactured in the same manner as in the comparative example, except that the fastener mounting bracket 12 was punched and bent from a steel plate and then electrogalvanized.

[Rust prevention performance test 1]
Next, with respect to the bolt tightening type tightening bands of Examples 1 to 4 and Comparative Examples and Reference Examples, the middle part in the longitudinal direction of the band main body 11 is cut out to a length of 100 mm to obtain a test piece, which is wet as a rusting acceleration test. Test (48 ° C, 95% RH) and salt spray test (35 ° C, 5% saline) are conducted, and the rusting situation is examined every predetermined time, and the rust prevention performance is determined by the rusting area ratio on the side end face 11a. It was evaluated in five stages. The results are shown in Table 1 below together with the following four-stage evaluation of cost performance in the rust prevention treatment. In addition, rust prevention performance evaluation is based on the average value of many test pieces.

[Rust prevention performance evaluation]
×× Rust area 50% or more × Rust area 20% to less than 50% Δ Rust area 5% to less than 20% ○ Rust area less than 5% ... No rusting

〔Cost performance〕
× ・ ・ ・ Highly expensive △ ・ ・ ・ Slightly expensive ○ ・ ・ ・ Relatively low cost ◎ ・ ・ ・ Very low cost

  As is apparent from Table 1, in the tightening band using the band-shaped material slit-cut from the hot-dip galvanized steel sheet as the base material of the band main body, rust prevention is provided on the side end surfaces on both sides of the band main body as in Examples 1-4. By providing the coating, the rust prevention performance is improved with respect to Comparative Example 1 in which the rust prevention coating is not provided. Thus, when forming an anticorrosive film, when an aqueous emulsion type anticorrosive coating agent containing a wax emulsion and an acrylic resin emulsion is used (Examples 1 and 2), the zinc rich is slightly expensive. Equivalent to the case of using paint (Example 4) and the processing cost is high, and it is very comparable to the tightening band (reference example) using a fastener mounting bracket without a non-plated surface by post-plating. It can be seen that excellent rust prevention performance can be obtained.

[Rust prevention performance test 2]
Next, with respect to the bolt tightening type tightening bands of the first embodiment, the comparative example, and the reference example, the operator who put a work gloves attached and detached the open drum can D (see FIG. 6) five times, and then the band main body. One end side to which the fastener mounting bracket 12 of 11 is fixed is cut out to make a test piece. As a rusting acceleration test, the same wetness test (48 ° C., 95% RH) and salt spray test (35) (5 ° C., 5% saline), and outdoor (factory zone) and indoor (laboratory) exposure tests, and the outer edge side along the longitudinal direction of the circumferential end surface 12b of the fastener mounting bracket 12 every predetermined number of days ( The state of rusting on the end face side of the band main body 11) was examined, and the rust prevention performance was evaluated based on the rusting area ratio on the outer edge side in the five stages described above. The results are shown in Table 2 and Table 3 below, and Table 3 shows the evaluation of the four stages of cost performance in the rust prevention treatment of the fastener mounting bracket 12 together. In addition, rust prevention performance evaluation is based on the average value of many test pieces.

  In general, the peripheral end surface of the fastener mounting bracket in this type of tightening band is subjected to some rust-proofing treatment because a hand fitted with a workman's work gloves touches during the attachment / detachment operation to the can body such as the open drum D. However, it is a site where the rust-proof surface is more likely to be damaged than originally. However, as shown in Tables 2 and 3, the tightening band (Example 1) of the present invention in which the rust preventive coating is applied to the non-plated surface (the peripheral end surface 12b) of the fastener mounting bracket 12 has a processing cost. Compared to a tightening band (reference example) using a fastener mounting bracket that has no unplated surface due to high post-plating, the anti-corrosion performance of the fastener mounting bracket is different in the wet test, salt spray test, and indoor exposure test. In the outdoor exposure test, it can be seen that the difference in the anticorrosion performance is slight and at a level causing no practical problem.

The perspective view which shows an example of the bolt fastening type | mold fastening band to which this invention is applied. The perspective view which expands and shows the principal part of the bolt fastening type | mold tightening band. The perspective view which shows an example of the inner lever type | formula tightening band to which this invention is applied. The perspective view which shows the principal part of an example of the outer lever type | formula tightening band to which this invention is applied. The schematic diagram which shows the manufacturing process of the band main body of the fastening band of this invention. The use state of the bolt tightening type tightening band is shown, (A) is a perspective view showing the tightening state of the fitting lid in the open drum, and (B) is a cross-sectional view taken along line BB in (A).

Explanation of symbols

1-3 Tightening band (tightening band for mating lid)
4 Roll forming portion 5 Curl forming portion 6 Cutter 7 Can body 7a Opening edge periphery 8 Cover plate 8a Cover plate periphery 10 Winding roll 10a Band material 11 Band body 11a Edge end surface 11b End surface 12 Fastening tool mounting bracket 12b Surrounding end surface 13 Bolt (Clamp)
14 Nut (clamp)
21 Band body 22 Fastener mounting bracket 25 Operation lever (clamp)
26 Link piece (clamp)
31 Band body 32 Fastener mounting bracket 34 Lever (clamp)
35 Link piece (clamp)
D Open drum (can body)

Claims (6)

A band main body having an angled cross section that holds the peripheral edge of the opening of the can main body and the peripheral edge of the lid plate fitted in the opening in a superposed state, and the both end portions interposed between both ends of the band main body. A fastener that attracts and tightens;
A tightening band for a fitting lid of a can body, wherein the band main body is made of a roll-formed product of a band plate material obtained by cutting a plated steel plate, and at least an antirust coating is formed on both side edges of the band main body.   Fastener mounting brackets punched and bent from a plated steel plate are fixed to both ends of the band main body, and a rust preventive film is formed on both end surfaces of the band main body in the longitudinal direction and end surfaces of the fastener mounting bracket. The tightening band for a fitting lid according to claim 1.   The tightening band for a fitting lid according to claim 1 or 2, wherein the plated steel sheet is a hot-dip galvanized steel sheet.   The tightening band for a fitting lid according to any one of claims 1 to 3, wherein the rust preventive film is a coating film of a wax-based aqueous emulsion type rust preventive coating agent.   The tightening band for a fitting lid according to claim 4, wherein the antirust coating agent contains a wax emulsion and an acrylic resin emulsion.   Applying and drying a rust-preventive coating agent to both sides of the wound coil of a long strip that has been slit cut from a plated steel sheet, forming a rust-preventive coating, and then continuously feeding the strip from the wound coil The band-shaped material is formed into a mountain shape in cross section by roll molding, and then curled into an annular shape, and the band plate material is cut for each fixed length of the curl to produce an open annular band body. A method for producing a tightening band for a fitting lid of a can body, wherein a fastener mounting bracket is fixed to both ends of a main body by resistance welding.

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