JPS59222319A - Manufacture of synthetic resin case - Google Patents

Abstract

PURPOSE:To eliminate the necessity for a shaping metal mold consisting of an inner mold and an outer mold by such an arrangement wherein a sheet of raw material corresponding to the developed form of a case is stamped out, and at the same time, folding lines are formed at its both sides by heating, and the sheet is doubled and reinforcing sheets are joined to its both sides. CONSTITUTION:A sheet of raw material A wherein a front board portion 1, bottom board portion 2 and back board portion 3 are continuously provided in order is integrally formed, and side board portions 4, 5, 6 are also continuously provided to both edges of each of those board portions 1-3. Simultaneously with stamping out, a folding line 7 is processed being heated by high frequency wave, etc. at all boundaries between board portions 1-3 and side board portions 4-6 respectively, and the sheet is doubled with the bottom board portion 2 placed at the center. As the overlapped side board portions 4, 6 are cut off, being melted, at the center of their width, the sheet naturally becomes the condition of a flat square case. Reinforcing sheets 11 which are the same in shape and material as that of side board portions 4, 6 are placed on the side board portions, and they are integrally joined being fused to obtain a final product.

Description

【発明の詳細な説明】 この発明は、例えはめがねケースの如き扁ヅ角筒形で一
端が開口する軟質合成樹脂ケースの製造方法の改良に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a method for manufacturing a soft synthetic resin case, such as an eyeglass case, which is shaped like a rectangular cylinder and is open at one end.

この棟ケースの従来の製造方法は、ケースを展開した状
態にシートから打抜き折目筋も施すが、゛側イか部を対
向する側板部と重ね合わせて溶着一体化するものである
ため、対向する両（Ｍｌ：　＋ｂ部を重ね合わすには打
抜かれた展開状態の素材を箱形に保持するための中型と
外型を必要とし、そのため溶接装置が複雑となる。The conventional manufacturing method for this ridge case involves punching out creases from the sheet when the case is unfolded, but since the two sides are overlapped and welded together, the opposite sides are In order to overlap the two (Ml: +b parts), a middle mold and an outer mold are required to hold the punched and expanded material in a box shape, which makes the welding equipment complicated.

この発明は扁トＩＺな軟質合成樹脂ケース製造」二の上
記間順点を解決したもので、その目的とするところは、
ケースを展開した状態に打抜いた素材からケースにする
工程に、内型と外型からなる保形金型を必要としない合
成＃Ｍ脂ケースの製法を提供するにある。This invention solves the above-mentioned problems of ``manufacturing flat IZ soft synthetic resin cases'', and its purpose is to:
To provide a method for manufacturing a synthetic #M resin case that does not require a shape-retaining mold consisting of an inner mold and an outer mold in the process of making a case from a material punched in an unfolded state.

Ｚこの発明の他の目的とするところは、高周波加熱によ
る折目筋形成時に折目筋付近に加熱による軟化乃至溶融
による不体裁な光沢が生じることなき合成樹脂ケースと
するにある。Another object of the present invention is to provide a synthetic resin case that does not cause unsightly gloss due to softening or melting caused by heating in the vicinity of the crease lines when the crease lines are formed by high-frequency heating.

この発明の詳細を添付図面に示す実施例に基ついてり、
下に説明する。The details of the invention are based on the embodiments shown in the accompanying drawings.
Explained below.

第１図においてＡは合成樹り旨からなる扁平なケースと
なすための、軟質合成樹脂シートから打抜かれ展開状態
のケース素材であり、この素材Ａは正面板部１と底＋ル
部２、および背面板部３をその順に一体に連成し、各板
部１．２．３の両側縁には側板部４，５．６が速成しで
ある。In Fig. 1, A is a case material punched out of a soft synthetic resin sheet and unfolded to form a flat case made of synthetic wood. and back plate part 3 are integrally connected in that order, and side plate parts 4, 5.6 are quickly formed on both side edges of each plate part 1.2.3.

底板部２におけるｆｌ］１１板部５は三角片とした方が
あとの溶着工程での納まりがよい。又（ｌｕｌｌ　’４
］５部５を三角片とした場合には正面板部１や背面板部
３の方の側板部４，６も三角片に対応して側端縁を傾斜
させる。[fl]11 in the bottom plate part 2 It is better to form the plate part 5 into a triangular piece so that it fits better in the subsequent welding process. Again (lull '4
] 5 When the portion 5 is a triangular piece, the side plate parts 4 and 6 of the front plate part 1 and the back plate part 3 also have side edges inclined in accordance with the triangular pieces.

又打抜きと同時に各板部１，２．３とその１１１１枦部
４，５．６の境界部に高周波等による加熱下で折目筋７
が施こされる（以上第１工程）。In addition, at the same time as punching, crease lines 7 are formed at the boundaries between each plate part 1, 2.3 and its 1111 ridge part 4, 5.6 under heating by high frequency etc.
is performed (the above is the first step).

得られた上記素材Ａは第２図のように底板部２を中央に
して２つ折りする（第２工程）。The obtained material A is folded in half with the bottom plate portion 2 in the center as shown in FIG. 2 (second step).

次いで２つ折りした素材Ａにおける重なり合う側板部４
，６を［１］方向中央部で溶断する（第３工程）。溶断
は左右の側板部を同時に行うが、第２図では一方の側板
部のみ溶断して示した。同図において８は溶断した部分
、９は溶断による捨てられる部分を示す。Next, the overlapping side plate portions 4 of the material A folded in half
, 6 at the center in the [1] direction (third step). The left and right side plates are fused at the same time, but in FIG. 2, only one side plate is fused and cut. In the figure, 8 indicates a portion that has been fused and 9 indicates a portion that is discarded due to the fusion.

第２図において上下に重なり合う左右の側板部を溶断す
ると、正面板部１及び背面板部３と底板部２間には折目
が存在しないので、底板部付近では第１図の展開状態に
復元しようとし、且つ正面板部や背面相部とそのイｌ］
ｌ＋板部間には折目筋７があるので、前記溶断上同時に
自然に第３図のように扁平角形のケースの状態となる。When the left and right side plates that overlap vertically in Fig. 2 are cut by melting, there is no crease between the front plate 1, the back plate 3, and the bottom plate 2, so the area near the bottom plate is restored to the unfolded state shown in Fig. 1. and the front plate part, back phase part and its parts]
Since there is a crease line 7 between the l+ plate parts, at the same time as the above-mentioned fusing occurs, the case naturally becomes a flat rectangular case as shown in FIG.

１０は溶断接続部分での対向する仙１彷部４，６のつき
合わされた部分を示す。Reference numeral 10 denotes a portion where the facing portions 4 and 6 are brought into contact with each other at the fusing connection portion.

上記溶断した接続のみでは接続部分が外力により離断す
るおそれがあるので、第４図のように、連結する（ｔｉ
ｌｌ　板部４．６の表面にこれと同形同材質の補強シー
　ｌ−１１を重ねて溶着一体化して成品上する、（＠４
工程）。１２は溶着を強固にするための凹凸条を示す。If only the above-mentioned fused connection is made, there is a risk that the connected part will be separated by external force, so as shown in Figure 4, the connection (ti
ll Overlap reinforcing sheet 1-11 of the same shape and material on the surface of plate part 4.6 and weld it together to complete the finished product (@4
process). Reference numeral 12 indicates a concavo-convex strip for strengthening the welding.

又補強シート１１の溶着時、溶着の前に底板部２の１１
１１１４板部５を、溶断接続された（ｌｌｊ板部４１，
６の端の空所１３に指先を使用して挿入し補強シー　ト
１１で押えることにより底部両イＩ４Ｈに生じるおそれ
がある切込みのような隙間を皆無にすることができる。Also, when welding the reinforcing sheet 11, weld the reinforcing sheet 11 on the bottom plate 2 before welding.
1114 plate part 5 was fused and connected (llj plate part 41,
By inserting it into the space 13 at the end of the bottom part 6 using a fingertip and pressing it with the reinforcing sheet 11, it is possible to completely eliminate any gap such as a notch that may occur on both bottom parts I4H.

この発明は上記したような構成であり、この合成樹脂ケ
ースの製造方法は、竪型扁平角筒形のケースの展開状素
材を軟質合成樹脂シートから打抜くと共に各側板部の根
元部に加熱下で折目筋を施こす第１工程と、打抜いた素
材を底板部を中央にして２つ折りする第２工程、２つ折
りに重なり合う１１＋１１　根部を［↑Ｊ方向中央で溶
断する第３工程と、最後に溶断により連続状態となる側
板部外面に補強シー　トを重ねて溶着一体化する第４工
程とからなるもので、この方法によれば打抜かれたケー
ス素材を２つ折りした状態で重なり合う側板部を中方向
中央部で溶断すると同時に竪型扁平の有底角筒形吉なり
、従来のこの種ケース製造におけるような箱形にするた
めの内型や外型を全く必要とせず、且つ製造装置もきわ
めて簡単となり、単位時間の生産臘も犬となり、勢い合
成樹脂ケースを低コストで提供し得るという効宋がある
。The present invention has the above-described structure, and the method for manufacturing this synthetic resin case includes punching out the expanded material of the vertical flat rectangular cylindrical case from a soft synthetic resin sheet, and applying heat to the base of each side plate. The first step is to create crease lines, the second step is to fold the punched material in half with the bottom plate in the center, and the third step is to cut the overlapping 11+11 roots in half at the center in the ↑J direction. Finally, the fourth step consists of stacking a reinforcing sheet on the outer surface of the side plate, which has been made continuous by fusing, and welding it together. According to this method, the punched case material is folded in half and the overlapping side plate is folded in half. At the same time, the case is melt-cut at the center in the middle direction, and at the same time it becomes a vertical, flat, square cylinder with a bottom.There is no need for an inner mold or an outer mold to make the case into a box shape, which is required in conventional case manufacturing of this type of case. The process becomes extremely simple, the production time per unit time is reduced, and the advantage is that synthetic resin cases can be provided at low cost.

又この種合成樹脂ケースにおいて折目筋７を加熱下で形
成すると折目筋付近が軟化乃至溶融して光沢を生し商品
価値を著しく低下するものであるが、第６図に示すよう
に折目筋を施す部分でケース素材の裏面にヘークライト
等の電気絶縁材からなる祈片１３を介在し、叶つ前記板
片１３の両１１１１に真ちゅうのような熱良導材からな
る板片１４を配して副周波加熱により折目筋７を形成す
ることにより、高周波の」二部電極１５と下部電極１６
間に発生する熱は電気絶縁されることによって半は抑制
され叶つ発生した熱は熱良導枡片１４に吸収されるので
折目筋付近の熱は速やかに消失し、以て合成樹脂シート
における加熱を望まぬ部分の、過熱に起因する軟化乃至
溶融を良好に防止できてこの部分（こ不体裁な光沢が生
じることがないという効果がある。In addition, when the crease line 7 is formed under heating in this type of synthetic resin case, the vicinity of the crease line softens or melts, producing a gloss and significantly reducing the commercial value. A prayer piece 13 made of an electrically insulating material such as Heckleite is interposed on the back side of the case material at the part where the markings are applied, and a plate piece 14 made of a thermally conductive material such as brass is placed on both sides 1111 of the plate piece 13. By forming the crease line 7 by sub-frequency heating, the two-part electrode 15 and the lower electrode 16
The heat generated between the folds is partially suppressed by electrical insulation, and the generated heat is absorbed by the heat conductive piece 14, so the heat near the creases is quickly dissipated, and the synthetic resin sheet This has the effect that softening or melting caused by overheating in areas where heating is not desired can be effectively prevented, and unsightly gloss will not occur in these areas.

【図面の簡単な説明】[Brief explanation of the drawing]

図面は不発１９ｊの合成樹脂ケースの製造方法の実施例
をボすもので、第１図は軟質合成樹脂ソートから打抜か
れた合成樹脂ケース素材の一例の展開斜視図、第２図は
重なり合う（Ｕｌ＋　１部を溶断する工程の斜視図、第
３図は前記溶断と同時にケース形となった斜視ツ１、第
４図は完成ケースの斜視図、第５図は同」−要部の拡大
断面図、第６図は高周波による折目筋形成の工程の断面
図である。 Ａ・・素材、１・・正面機部、２・・底彷部、３・・・
背面根部、４，５．６・・・イ（］］１物部、７・折目
筋、８・・・溶断部　１１・・・補強シート、１３・・
・絶縁材からなる板片、１４・・熱良導材からなる材片
。 特許出願人　　坂　口　利　夫 同　同　　　　オクィ株式会社 同　代理人　　鎌　１）文　二The drawings show an example of the method for manufacturing the synthetic resin case of the unexploded 19j. Fig. 1 is a developed perspective view of an example of the synthetic resin case material punched from soft synthetic resin sorting, and Fig. 2 is an overlapping (Ul + Fig. 3 is a perspective view of the process of fusing one part, Fig. 3 is a perspective view of the case 1 formed at the same time as the fusing, Fig. 4 is a perspective view of the completed case, and Fig. 5 is an enlarged sectional view of the main parts. , Fig. 6 is a cross-sectional view of the process of forming crease lines using high frequency waves.
Back root part, 4, 5.6... I(]] 1. Part, 7. Fold line, 8... Fused part 11... Reinforcement sheet, 13...
- Piece of plate made of insulating material, 14... Piece of material made of heat conductive material. Patent applicant: Toshio Sakaguchi, Oki Co., Ltd. Agent: Kama 1) Bun 2

Claims (2)

【特許請求の範囲】[Claims] （１）　　ケースの正面（ル部、底板部、背面面板部を
その順に連成し、前記各板部の両倶１縁には、・ｌ（ｌ
］ｌｉ鈑部をそれぞれ連成した素材を軟質合成樹脂シー
トから打抜くと共に前記各（ル部とＩｌｌ　１部の境界
に加熱下そ折目筋を施こす第１工程と、前記打抜いた素
材をその底板部を中央にして２つ折りし重ね合わせる第
２　Ｉ程々、前記２つ折りし重ね合わせた素材における
重なり合う側板部を巾方向中央部で溶断する第３王程と
、前記溶断し連結状態の何１板部外面に補強シートを重
ね且つ底板部両ｆｌｌｌの（ｔｌ１＋　板部を前記溶断
連結する（ｔｌ、ｌｉ板部の方に挿入してこれらの（ｌ
ｔｌ：板部と補強シートを溶着一体する第４工程とから
なることを特徴とする合成樹脂ケースの製造方法。(1) The front side of the case (the main part, the bottom plate part, and the back face plate part are connected in that order, and on both edges of each plate part, ・l(l
] A first step of punching out a material in which the li plate parts are connected respectively from a soft synthetic resin sheet and applying heating bottom creases at the boundary between the li plate parts and the 1 part, and the punched material. The second step is to fold the materials in half with the bottom plate part in the center and overlap them, and the third step is to fuse and cut the overlapping side plate parts of the folded and stacked materials at the center in the width direction, and the melt cut and connected state. First, a reinforcing sheet is superimposed on the outer surface of the plate part, and the (tl1+ plate parts of both bottom plate parts are welded and connected (tl, li plate parts) and these (l
tl: A method for manufacturing a synthetic resin case, comprising a fourth step of welding the plate portion and the reinforcing sheet together. （２）　　ケースの正面板部、底板部、背面板部をその
順に連成し、前記各機部の両側縁には（１１１１板部を
それぞれ連成した素材を軟質合成樹脂シートから打抜く
第１工程き、前記各板部と側板部の境界の折目筋を施こ
す部分で素材裏面に電気絶縁材からなる板片とその両０
１１ｉに熱良導材からなる板片を配して前記境界に高周
波加熱により折目筋を施こす第２工程と、前記打抜いた
素材をその底板部を中央にして２つ折りし重ね合わせる
第３工程と、前記２つ折りし重ね合わせた素材における
重なり合う佃１根部を中方向中央部で溶断する第４工程
と、前記溶断し連結状態の側板部外面に補強シートを重
ね巨っ底板部両何１の伺・板部を前記溶断連結する（ｔ
ｌｌｉ　＆部の方に挿入してこれらのｆｌＩｂ板部と補
強シー］・を溶着一体する第５工程とからなることを特
徴とする合成樹脂ケースの製造方法。(2) The front plate, the bottom plate, and the back plate of the case are connected in that order, and on both sides of each of the above-mentioned parts, there are holes punched out of a soft synthetic resin sheet from which the 1111 plate parts are connected, respectively. After the first step, a plate piece made of electrical insulating material and its both sides are placed on the back side of the material at the part where the crease line is made at the boundary between each plate part and the side plate part.
A second step of arranging a plate made of a thermally conductive material on 11i and creating crease lines at the boundary by high-frequency heating, and a second step of folding the punched material in half with the bottom plate in the center and overlapping them. 3 steps, and a 4th step of fusing and cutting the overlapping Tsukuda 1 roots of the two-folded and overlapping materials at the central part in the middle direction, and stacking a reinforcing sheet on the outer surface of the side plates in the melted and connected state, and cutting both sides of the large bottom plate. 1. Connect the cover and plate portions by fusing as described above (t
A method for manufacturing a synthetic resin case, comprising a fifth step of inserting the flIb plate portion and the reinforcing sheet into the flIb plate portion and welding them together.