JPH087576Y2 - plastic case - Google Patents

plastic case

Info

Publication number
JPH087576Y2
JPH087576Y2 JP1990105196U JP10519690U JPH087576Y2 JP H087576 Y2 JPH087576 Y2 JP H087576Y2 JP 1990105196 U JP1990105196 U JP 1990105196U JP 10519690 U JP10519690 U JP 10519690U JP H087576 Y2 JPH087576 Y2 JP H087576Y2
Authority
JP
Japan
Prior art keywords
case
welded
welding
rib
lower half
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1990105196U
Other languages
Japanese (ja)
Other versions
JPH0462564U (en
Inventor
明尚 喜多
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP1990105196U priority Critical patent/JPH087576Y2/en
Priority to US07/743,617 priority patent/US5199593A/en
Priority to DE4126903A priority patent/DE4126903A1/en
Publication of JPH0462564U publication Critical patent/JPH0462564U/ja
Priority to US08/008,180 priority patent/US5288350A/en
Application granted granted Critical
Publication of JPH087576Y2 publication Critical patent/JPH087576Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/749—Removing scrap
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1244—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue
    • B29C66/12443—Tongue and groove joints characterised by the male part, i.e. the part comprising the tongue having the tongue substantially in the middle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12469—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being asymmetric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1248—Interpenetrating groove joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/126—Tenon and mortise joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/322—Providing cavities in the joined article to collect the burr
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/324—Avoiding burr formation
    • B29C66/3242—Avoiding burr formation on the inside of a tubular or hollow article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2017/00—Carriers for sound or information
    • B29L2017/008—Tapes

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は上下のハーフケースを重ね合わせ溶着して構
成されるプラスチックケースに関し、特に、比較的小さ
くて溶着スペースが制限されるようなプラスチックケー
スに関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a plastic case formed by stacking and welding upper and lower half cases, and in particular, a plastic case that is relatively small and has a limited welding space. It is about.

（従来技術） 近年においては、プラスチック樹脂を用いた商品は多
岐わたっている。そして、その中に一つの形態として箱
状のケース内に所望の部品を収納したもの、例えば、磁
気ディスクカートリッジ、光磁気ディスクカートリッ
ジ、ビデオテープカセットやオーディオテープカセット
等の磁気テープカセットのように、ディスク或はテープ
等の記録媒体を収納して、比較的小さくてその成形精度
が要求されるもので、上下のハーフケースを重ね合わせ
て構成したプラスチックケースを匡体として用いたもの
がある。(Prior Art) In recent years, a wide variety of products use plastic resins. And, as one form in which a desired part is housed in a box-shaped case, for example, a magnetic disk cartridge, a magneto-optical disk cartridge, a magnetic tape cassette such as a video tape cassette or an audio tape cassette, A recording medium such as a disk or a tape is accommodated and is relatively small, and its molding accuracy is required. There is a case in which a plastic case constituted by stacking upper and lower half cases is used as an enclosure.

そして、磁気テープカセットにおいては、例えば、特
開昭47-37913号、同54-98604号、実開昭57-102085号、
同64-871号公報等に上下ハーフケースの締結形態の工夫
が開示されている。In the magnetic tape cassette, for example, JP-A-47-37913, JP-A-54-98604, and JP-A-57-102085,
Japanese Patent Laid-Open No. 64-871 discloses a device for fastening the upper and lower half cases.

前記特開昭47-37913号に開示されたものは、上下ハー
フケースのどちらか一方に接合端面の一部分に突起を設
け、超音波溶着機により、この突起部分を溶かして接着
する方法である。前記特開昭54-98604号、実開昭57-102
085号公報に開示されたものは、上下カセットハーフの
接合部分に、一方に凸部を他方に該凸部に嵌合する凹部
を形成して、この凹凸を嵌合させ上下ハーフケースを位
置決めしてから超音波溶着にて溶着するタイプのもので
ある。また、前記実開昭64-871号公報に開示されたもの
は、凹凸嵌合部分を溶着した上に該部分を螺子止めする
ような構造が開示されている。The method disclosed in Japanese Patent Laid-Open No. 47-37913 is a method in which a protrusion is provided on a part of the joint end face on either one of the upper and lower half cases, and the protrusion is melted and bonded by an ultrasonic welding machine. The above-mentioned JP-A-54-98604 and JP-A-57-102.
What is disclosed in Japanese Patent No. 085 is to form a convex portion on one side and a concave portion to be fitted to the convex portion on the other side at the joining portion of the upper and lower cassette halves, and fit the concave and convex portions to position the upper and lower half cases. After that, it is a type that is welded by ultrasonic welding. Further, the one disclosed in Japanese Utility Model Laid-Open No. 64-871 discloses a structure in which a concave-convex fitting portion is welded and then the portion is screwed.

前記超音波溶着機は周知のように、接合面を適宜加圧
しながら20キロヘルツ〜40キロヘルツ程度の超音波振動
与えて、このとき発生する強力な摩擦熱により合成樹脂
を溶融し、溶着する。As is well known, the ultrasonic welding machine applies ultrasonic vibration of about 20 kHz to 40 kHz while appropriately pressing the joint surfaces, and the strong frictional heat generated at this time melts and welds the synthetic resin.

（考案が解決しようとする課題） このように前記磁気テープカセットの如きこの種のプ
ラスチックケースにおいては、その生産性の点から超音
波溶着にて上下ハーフケースを固定することが上記各公
報の如く種々提案され、採用されているが、超音波溶着
の場合に於いては、第11図及び第12図に示すような構造
が採用されていた。第11図の場合は、上下ハーフケース
２、３の側壁の端面に突起2aを形成して、下ハーフケー
ス３と重ね合わせ、前記突起2aを溶かす構成であり、第
12図に示すものは、上ハーフケース２に凹部27を設ける
一方、該凹部27の開口径よりも小さい径の凸部28を下ハ
ーフケース３に形成し、両凹凸部分の嵌合させて、前記
凸部28の先端面29と前記凹部27の底面との接触部分を溶
着する構造が採用されていた。(Problems to be solved by the invention) As described above, in this type of plastic case such as the magnetic tape cassette, the upper and lower half cases may be fixed by ultrasonic welding in terms of productivity. Although various proposals have been made and adopted, in the case of ultrasonic welding, the structures shown in FIGS. 11 and 12 have been adopted. In the case of FIG. 11, the protrusions 2a are formed on the end faces of the side walls of the upper and lower half cases 2 and 3, and the protrusions 2a are melted by overlapping the lower half case 3 with each other.
In the structure shown in FIG. 12, the concave portion 27 is provided in the upper half case 2, and the convex portion 28 having a diameter smaller than the opening diameter of the concave portion 27 is formed in the lower half case 3 to fit both concave and convex portions. A structure has been adopted in which the contact portion between the tip surface 29 of the convex portion 28 and the bottom surface of the concave portion 27 is welded.

この何れの構造においても接合部分の溶着とほぼ同時
にプラスチックの微粉末70が発生する。これは、接合部
分が振動して擦れ合う時に発生する削れ粉末であり、溶
着が完了するまでの僅か時間における前段の時間におい
て発生するものである。前記微粉末70のような塵埃がケ
ース内に止まっていると、例えばこのケースに内蔵され
るものが磁気ディスクや磁気テープである場合には、前
記微粉末70がこの記録媒体に付着し、ドロップアウトが
発生するなど記録再生特性の低下を引き起こす原因とな
っていた。In any of these structures, the fine plastic powder 70 is generated almost at the same time as the welding of the joint portion. This is shaving powder generated when the bonded portions vibrate and rub against each other, and is generated in the time of the preceding stage in a short time until the welding is completed. When dust such as the fine powder 70 remains in the case, for example, when the built-in case is a magnetic disk or a magnetic tape, the fine powder 70 adheres to the recording medium and drops. This is a cause of deterioration of recording / reproducing characteristics such as occurrence of out.

本考案の課題は、上下ハーフケースの締結において、
超音波溶着を用いて締結されても、溶着時の微粉末をケ
ース内に進入するのを回避できるように構成したプラス
チックケースを提供することにある。The problem of the present invention is to fasten the upper and lower half cases,
It is an object of the present invention to provide a plastic case configured so as to prevent fine powder during welding from entering the case even if it is fastened by ultrasonic welding.

（課題を解決するための手段） 本考案の上記課題は、上下ハーフケースを重ね合わせ
該上下ハーフケースの溶着する突き合わせ部分に、超音
波振動を加えることにより固定溶着して構成されるプラ
スチックケースにおいて、前記突き合わせ部分は凹部と
凸部とが対向して溶着部を形成すべく、凹部内径よりも
凸部外径を若干大きく構成されており、前記突き合わせ
部分の溶着部を囲む位置で前記凹部側かあるいは前記凸
部側の一方に防塵リブが、他方に該防塵リブに略接触可
能な対向壁部が設けられ、前記上下ハーフケースの溶着
のときに、前記溶着部の先端同士が接触する前に、前記
防塵リブと前記対向壁部とにより、少なくともケース内
部空間と前記溶着部を略隔離状態にできることを特徴と
するプラスチックケースにより解決することができる。(Means for Solving the Problem) The above-mentioned problem of the present invention relates to a plastic case which is constructed by superposing upper and lower half cases and fixing and welding them by applying ultrasonic vibration to the welded butting portions of the upper and lower half cases. The abutting portion is configured such that the concave portion and the convex portion face each other to form a welded portion so that the outer diameter of the convex portion is slightly larger than the inner diameter of the concave portion. Alternatively, a dust-proof rib is provided on one side of the convex portion, and an opposite wall portion that can substantially contact the dust-proof rib is provided on the other side, and when the upper and lower half cases are welded, before the tips of the welded portions come into contact with each other. In addition, the present invention provides a plastic case characterized in that at least the internal space of the case and the welded portion can be substantially separated by the dustproof rib and the facing wall portion. You can

（実施態様） 以下、本考案の好ましい実施態様について添付図面を
参照して詳細に説明する。(Embodiment) Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

第１図は本考案に基づくVHS方式VTR用磁気テープカセ
ットの概略分解斜視図であり、第２図乃至第５図は第１
図に示した磁気テープカセットにおける溶着部分の概略
断面図である。又、第６図乃至第10図は本考案の他の実
施態様の溶着部分を示した要部断面図である。FIG. 1 is a schematic exploded perspective view of a magnetic tape cassette for a VHS system VTR according to the present invention, and FIGS.
It is a schematic sectional drawing of the welding part in the magnetic tape cassette shown in the figure. 6 to 10 are cross-sectional views of the essential parts showing the welded portion of another embodiment of the present invention.

第１図に示すVTR用テープカセットは周知のように、
概略構造は磁気テープ26を巻回したテープリール25が、
上ハーフケース２と下ハーフケース３とから成るカセッ
トケース内に収容され、該カセットケースの前方のテー
プ引き出し開口はガードパネル22によって覆われる（他
の構成部品は便宜上省略する）。As is well known, the tape cassette for VTR shown in FIG.
The schematic structure is that the tape reel 25 around which the magnetic tape 26 is wound,
It is housed in a cassette case composed of an upper half case 2 and a lower half case 3, and a tape drawer opening in front of the cassette case is covered by a guard panel 22 (other components are omitted for convenience).

前記上ハーフケース２は、窓用開口15を有する矩形状
の上壁面18の周縁に立設された前後側壁12,13と左右側
壁14,14から成る箱体であり、射出成形等により一体成
形されると共に前記窓用開口15に透明な窓部材が溶着さ
れており、その上壁面内側中央部には前記テープリール
25をカセット下方に付勢する板バネが固定されている。The upper half case 2 is a box body composed of front and rear side walls 12 and 13 and left and right side walls 14 and 14 which are erected on the periphery of a rectangular upper wall surface 18 having a window opening 15, and is integrally formed by injection molding or the like. At the same time, a transparent window member is welded to the window opening 15, and the tape reel is provided at the center of the upper wall surface inside.
A leaf spring that urges 25 toward the bottom of the cassette is fixed.

前記下ハーフケース３は、矩形状の底壁面６の周縁に
立設された前後側壁12,13と左右側壁14.14から成る箱体
であり、前記底壁面６には記録再生装置の駆動シャフト
を前記テープリール25のリールハブに挿入するためのシ
ャフト挿入口７が形成されている。そして、前記テープ
リール25は、これを囲むように略円形に前記上壁面18及
び底壁面６に立設された隔壁５によってカセット水平方
向に位置規制される。The lower half case 3 is a box body including front and rear side walls 12 and 13 and left and right side walls 14.14 which are provided upright on the periphery of a rectangular bottom wall surface 6, and the bottom wall surface 6 is provided with a drive shaft of a recording / reproducing apparatus. A shaft insertion port 7 for inserting the reel hub of the tape reel 25 is formed. The position of the tape reel 25 is regulated in the horizontal direction of the cassette by a partition wall 5 which is erected on the upper wall surface 18 and the bottom wall surface 6 so as to surround the tape reel 25.

前記上下ハーフケース２、３はABS等の合成樹脂で一
体成形されたものであり、従来に螺子止めしていた部分
が第２図に示すように、前記上ハーフケース２には凸部
20形成されており、一方、前記下ハーフケース３には前
記凸部20に対向した位置にケース厚み方向に突出したリ
ブ30が形成され、該リブ30には凹部31が形成されてい
る。前記リブ30には前記凹部31とケース外部を連通する
空気孔32が設けられている。さらに、前記凸部20には、
先端21よりも突出した（Ｈ＜H0の寸法関係にある）防塵
リブ33が先端部21の周りを囲むように環状に形成されて
いる。The upper and lower half cases 2 and 3 are integrally molded of a synthetic resin such as ABS. As shown in FIG.
On the other hand, the lower half case 3 is provided with a rib 30 protruding in the thickness direction of the case at a position facing the convex portion 20, and a concave portion 31 is formed in the rib 30. The rib 30 is provided with an air hole 32 that communicates the recess 31 with the outside of the case. Furthermore, in the convex portion 20,
A dustproof rib 33 protruding from the tip 21 (having a dimensional relationship of H <H 0 ) is formed in an annular shape so as to surround the tip 21.

又、前記凸部20の先端21はその外径Ｌが前記凹部31の
内径ｌよりも若干大きく構成されている。前記防塵リブ
33の内径L0は前記リブ30の外径l0よりも若干大きく構成
されており、溶着工程の際にさほど強く接触しないよう
に構成されている。The outer diameter L of the tip 21 of the convex portion 20 is slightly larger than the inner diameter l of the concave portion 31. The dustproof rib
The inner diameter L 0 of 33 is configured to be slightly larger than the outer diameter l 0 of the rib 30 so that the rib 33 does not come into strong contact during the welding process.

前記凹部31と前記凸部20とは、カセット組立の最終段
階において、上下ハーフケース２、３を重ねて突き合わ
せるようにして溶着される。この溶着は、前記上ハーフ
ケース２の上部の溶着ホーン80と前記下ハーフケース３
の下部の図示しない支持台とによりカセットケースを挟
み込み、前記溶着ホーン80により、上述の突き合わせ部
分に超音波振動を加える。したがって、前述の突き合わ
せ部分に摩擦熱が発生して接触部分が溶け始めて、第３
図に示すように、前記先端21の外周部分と前記凹部31の
内周部分とが溶けて溶着部35が形成されながら、前記凹
部31内に前記先端21が挿入溶着されて溶着が完了する。The concave portion 31 and the convex portion 20 are welded together so that the upper and lower half cases 2 and 3 are overlapped and abutted at the final stage of the cassette assembly. This welding is performed by welding the welding horn 80 on the upper half case 2 and the lower half case 3 together.
The cassette case is sandwiched by a support base (not shown) at the lower part of the above, and ultrasonic vibration is applied to the above-mentioned abutting portion by the welding horn 80. Therefore, frictional heat is generated in the abutting portion, the contact portion begins to melt, and the third
As shown in the figure, while the outer peripheral portion of the tip 21 and the inner peripheral portion of the recess 31 are melted to form a welded portion 35, the tip 21 is inserted and welded into the recess 31 to complete welding.

この溶着工程のとき、前記先端21と前記リブ30の上面
とが接触する前に、前記防塵リブ33は前記リブ30の外周
壁を覆うような状態に位置している。この結果、前記先
端21と前記リブ30の上面とが突き合わせられて、超音波
がかけられた際の擦れによる微粉末70の発生があって
も、前記防塵リブ33により、前記微粉末70のケース内部
90への進入を阻止することができる。この溶着の時に、
前記防塵リブ33と前記リブ30の外周壁とは極めて接近は
した状態にはあるが、前述の突き当て部分のように実質
的に当接した状態にないので、前記防塵リブ33の接触部
分には摩擦熱は発生しない。During this welding step, the dust-proof rib 33 is positioned so as to cover the outer peripheral wall of the rib 30 before the tip 21 and the upper surface of the rib 30 come into contact with each other. As a result, even if the tip 21 and the upper surface of the rib 30 are butted against each other and the fine powder 70 is generated due to rubbing when ultrasonic waves are applied, the dustproof rib 33 causes the fine powder 70 internal
It is possible to prevent entry to 90. At the time of this welding,
Although the dustproof rib 33 and the outer peripheral wall of the rib 30 are extremely close to each other, the dustproof rib 33 and the outer peripheral wall of the rib 30 are not substantially in contact with each other like the above-mentioned abutting portion. Does not generate frictional heat.

そして、溶着が完了した後には、前記先端21の進入量
よりも深く構成された前記凹部31によって、内部空間36
が形成される。前記内部空間36には前述の溶着により溶
け出した溶着樹脂の余剰部分38が流れ込むことができ
る。Then, after the welding is completed, the internal space 36 is formed by the recess 31 that is formed deeper than the entering amount of the tip 21.
Is formed. An excess portion 38 of the welding resin melted by the above-mentioned welding can flow into the internal space 36.

また、前記内部空間36とケース外部とを連通るように
空気孔32が設けられている。したがって溶着時の発熱に
よる前記内部空間36の気圧の増大を避けることができ、
前記余剰部分38の内部空間への効果的な流れ出しを可能
にする。Further, an air hole 32 is provided so as to connect the internal space 36 and the outside of the case. Therefore, it is possible to avoid an increase in the atmospheric pressure of the internal space 36 due to heat generation during welding,
This enables the surplus portion 38 to effectively flow into the internal space.

なお、前記内部空間36を比較的大きくすると、前記空
気孔32を設けなくとも、前記余剰部分38を前記内部空間
36にて充分受けることができる。In addition, when the internal space 36 is made relatively large, the surplus portion 38 is formed in the internal space without providing the air holes 32.
You can get enough at 36.

このように、前記防塵リブ33により、超音波溶着によ
り発塵した前記微粉末70はケース内部90に進入すること
が効果的に阻止される。また、前記内部空間36により溶
け出した前記余剰部分38が接合部分の外部に流れ出さな
いので、溶着により接合部分の外径寸法が変わったり、
溶着部分がケース外部に隣接する場合には外観を損なう
ような溶着を防止することができる。As described above, the dustproof ribs 33 effectively prevent the fine powder 70 generated by ultrasonic welding from entering the inside 90 of the case. Further, since the excess portion 38 melted out by the internal space 36 does not flow out of the joint portion, the outer diameter of the joint portion may be changed by welding,
When the welded portion is adjacent to the outside of the case, it is possible to prevent welding that impairs the appearance.

更に本実施態様においては、第１図に示すように、前
記下ハーフケース３にはカセット前方側の位置にリブ40
が設けられている。第５図に示すように、前記上ハーフ
ケース２にはリブ40に嵌合する凸部50が形成されてい
る。前記リブ40には、前記凸部50の外周壁を囲むように
対応する防塵リブ33が形成されている。また、前記リブ
40はカセットケースが記録再生装置に装填されたとき
に、位置決めピン等のカセット位置決め手段が挿入され
る位置決め孔59を囲むように構成されている。Further, in this embodiment, as shown in FIG. 1, the lower half case 3 is provided with a rib 40 at a position on the front side of the cassette.
Is provided. As shown in FIG. 5, the upper half case 2 is formed with a convex portion 50 that fits into the rib 40. Corresponding dustproof ribs 33 are formed on the ribs 40 so as to surround the outer peripheral wall of the convex portion 50. Also, the rib
Reference numeral 40 is configured to surround a positioning hole 59 into which a cassette positioning means such as a positioning pin is inserted when the cassette case is loaded in the recording / reproducing apparatus.

前記リブ40には段付凹部41が形成されており、この段
付凹部41の前記空気孔32は前記位置決め孔59に連通し
た、所謂位置決め孔を兼用した構成になされている。前
記凸部50の先端部分は、前記段付凹部41に対応すべく先
細りの段付先端51として構成されており、その最大径の
部分が前記防塵リブ33内に嵌入するように構成されてい
る。そして、溶着時は前記防塵リブ33によりケース内部
90と溶着部分とが隔離された状態で、前記段付先端51が
前記凹部41の中段の段部42のところまで挿入されて溶着
部35が形成される。A stepped recess 41 is formed in the rib 40, and the air hole 32 of the stepped recess 41 communicates with the positioning hole 59 and also serves as a so-called positioning hole. The tip portion of the convex portion 50 is configured as a tapered stepped tip 51 corresponding to the stepped recessed portion 41, and the maximum diameter portion thereof is configured to fit into the dustproof rib 33. . During welding, the dustproof ribs 33 keep the inside of the case
In the state where 90 and the welded portion are separated from each other, the stepped tip 51 is inserted up to the middle stepped portion 42 of the recess 41 to form the welded portion 35.

なお、前記空気孔32と前記凹部41との間に段部43が形
成されていることにより、前記位置決め孔59に溶着時に
溶け出した樹脂が流入することがない。Since the step portion 43 is formed between the air hole 32 and the recess 41, the resin melted at the time of welding does not flow into the positioning hole 59.

前記実施態様においては、環状の前記防塵リブ33が一
つ形成された構造であったが、本考案はこのような形態
に限るものではなく、例えば第６図及び第７図に示すよ
うに、防塵リブ33の外側にもう一つの防塵リブ34が設け
られた構成である。このように防塵リブを複数重ねた構
成であれば、防塵効果を更に高めることができる。In the above-described embodiment, the annular dustproof rib 33 is formed in one structure, but the present invention is not limited to such a form, and for example, as shown in FIGS. 6 and 7, Another dustproof rib 34 is provided outside the dustproof rib 33. If the dustproof ribs are stacked in this manner, the dustproof effect can be further enhanced.

また、本考案は溶着部が第８図及び第９図に示すよう
な構成であってもよい。この構成は、第５図に示した構
成の基本形であり、凸部20の先端21とその先端基部がリ
ブ30に形成された二段状の凹部31内に嵌入される構造で
ある。すなわち、前記先端21の高さｈよりも前記凹部31
の上部の深さh0が大きく構成されていると共に、前記先
端21の外径l1よりも前記凹部31の内径l2が僅かに大きく
構成されている。Further, the present invention may have a structure in which the welded portion is as shown in FIGS. 8 and 9. This structure is a basic form of the structure shown in FIG. 5, and has a structure in which the tip 21 of the convex portion 20 and the base of the tip are fitted into the two-step concave portion 31 formed in the rib 30. That is, the recess 31 is more than the height h of the tip 21.
The depth h 0 of the upper part of the recess 31 is set to be large, and the inner diameter l 2 of the recess 31 is set to be slightly larger than the outer diameter l 1 of the tip 21.

本考案においては、前記凹部31と前記凸部20の形成位
置関係は、前記実施態様とは上下逆にしてもよいのは勿
論である。In the present invention, it goes without saying that the formation positional relationship between the concave portion 31 and the convex portion 20 may be reversed from the above embodiment.

前記各実施態様においては、溶着部分をカセットケー
スの内方の部分に位置させたが、本考案はこれに限るも
のではなく、第10図に示すように凹部31を形成する位置
としてはカセットケースの側壁（ケース角部分も含む）
であってもよい。この場合、ケース内部90の側にのみ防
塵リブ33を適宜構成して、ケース内部90への微粉末70の
進入を阻止できる。In each of the above-described embodiments, the welding portion is located inside the cassette case. However, the present invention is not limited to this, and the position where the recess 31 is formed as shown in FIG. 10 is the cassette case. Side wall (including the corners of the case)
It may be. In this case, the dustproof rib 33 can be appropriately configured only on the case inside 90 side to prevent the fine powder 70 from entering the case inside 90.

また、上記実施態様においてはVHS方式VTR用磁気テー
プカセットについて述べたが、本考案はこれに限定する
ものではなく、β方式VTR用磁気テープカセット、更に
は8mmビデオ用の磁気テープカセット、オーディオテー
プカセット等の磁気テープカセットに限らず、磁気ディ
スクカートリッジ、光磁気ディスクカートリッジのよう
に特に小型軽量のケースを用いたもの最適であり、その
他あらゆるプラスチックケースについても応用できるこ
とは勿論である。Further, in the above embodiment, the magnetic tape cassette for VHS type VTR has been described, but the present invention is not limited to this, a magnetic tape cassette for β type VTR, a magnetic tape cassette for 8 mm video, an audio tape. Not limited to magnetic tape cassettes such as cassettes, it is most suitable to use small and lightweight cases such as magnetic disk cartridges and magneto-optical disk cartridges, and it goes without saying that it can be applied to all other plastic cases.

（考案の効果） 以上述べたように、本考案は超音波溶着する突き合わ
せ部分に、溶着部とケース内部90とを溶着時の発塵タイ
ミングよりも前に両部分を隔離する防塵リブが設けられ
たので、突き合わせ部分の溶着初期に発生する樹脂の微
粉末が、ケース内部90に進入することが回避され、ケー
ス内部90をクリーンに保つことができる。(Effect of the Invention) As described above, the present invention is provided with the dustproof rib for separating the welding portion and the inside 90 of the case from each other before the dust generation timing at the time of welding at the abutting portion where the ultrasonic welding is performed. Therefore, it is possible to prevent fine resin powder generated in the initial stage of welding of the butted portions from entering the inside 90 of the case, and keep the inside 90 of the case clean.

また、前記突き合わせ部分に内部空間のごとき間隙を
形成すると、溶着部にて溶けた樹脂の余剰部分を前記内
部空間に効果的に導くことができ、溶着により接合部分
の外径寸法が変わったりせず、又、溶着部分がケース外
部に隣接する場合には外から溶着樹脂はみ出しが見えな
いプラスチックケースを提供することができる。Further, if a gap such as an internal space is formed in the abutting portion, the surplus portion of the resin melted at the welded portion can be effectively guided to the internal space, and the outer diameter of the joint portion may be changed by the welding. Moreover, when the welded portion is adjacent to the outside of the case, it is possible to provide a plastic case in which the welded resin does not protrude from the outside.

【図面の簡単な説明】[Brief description of drawings]

第１図は本考案に基づくVHS方式VTR用磁気テープカセッ
トの概略分解斜視図であり、第２図乃至第５図は第１図
に示す磁気テープカセットの溶着部分の概略断面図、第
６図乃至第10図は本考案の他の実施態様の要部断面図、
第11図及び第12図は従来のケースの溶着構造を示すため
の概略断面図である。 （図中符号） ２……上ハーフケース、2a……突起、３……下カセット
ハーフ、５……隔壁、６……底壁面、７……シャフト挿
入口、12……前側壁、13……後側壁、14……左右側壁、
15……窓用開口、18……上壁面、20、50……凸部、21…
…先端、22……ガードパネル、25……テープリール、26
……磁気テープ、30、40……リブ、31……凹部、32……
空気孔、33,34……防塵リブ、35……溶着部、36……内
部空間、38……余剰部分、41……段付凹部、42、43……
段部、51……段付先端、59……位置決め孔、70……微粉
末、80……溶着ホーン、90……ケース内部。FIG. 1 is a schematic exploded perspective view of a magnetic tape cassette for a VHS type VTR according to the present invention, and FIGS. 2 to 5 are schematic sectional views of a welded portion of the magnetic tape cassette shown in FIG. 1 and FIG. To FIG. 10 are cross-sectional views of essential parts of another embodiment of the present invention,
11 and 12 are schematic cross-sectional views showing a conventional case welding structure. (Reference numeral in the figure) 2 ... upper half case, 2a ... protrusion, 3 ... lower cassette half, 5 ... bulkhead, 6 ... bottom wall surface, 7 ... shaft insertion port, 12 ... front side wall, 13 ... … Rear wall, 14 …… left and right sidewalls,
15 …… Window opening, 18 …… Top wall, 20, 50 …… Convex part, 21…
… Tip, 22 …… Guard panel, 25 …… Tape reel, 26
...... Magnetic tape, 30, 40 ...... Rib, 31 ...... Concave, 32 ......
Air holes, 33, 34 …… Dustproof ribs, 35 …… Welded portion, 36 …… Internal space, 38 …… Surplus portion, 41 …… Stepped recesses, 42, 43 ……
Steps, 51 ... Stepped tip, 59 ... Positioning holes, 70 ... Fine powder, 80 ... Welding horn, 90 ... Inside of case.

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】上下ハーフケースを重ね合わせ該上下ハー
フケースの溶着する突き合わせ部分に、超音波振動を加
えることにより固定溶着して構成されるプラスチックケ
ースにおいて、前記突き合わせ部分は凹部と凸部とが対
向して溶着部を形成すべく、凹部内径よりも凸部外径を
若干大きく構成されており、前記突き合わせ部分の溶着
部を囲む位置で前記凹部側かあるいは前記凸部側の一方
に防塵リブが、他方に該防塵リブに略接触可能な対向壁
部が設けられ、前記上下ハーフケースの溶着のときに、
前記溶着部の先端同士が接触する前に、前記防塵リブと
前記対向壁部とにより、少なくともケース内部空間と前
記溶着部を略隔離状態にできることを特徴とするプラス
チックケース。1. A plastic case constructed by stacking upper and lower half cases and fixing and welding the welded butted portions of the upper and lower half cases by applying ultrasonic vibration to the welded portions. In order to form the welded portion facing each other, the outer diameter of the convex portion is configured to be slightly larger than the inner diameter of the concave portion, and a dustproof rib is provided at one of the concave portion side and the convex portion side at a position surrounding the welded portion of the butted portion. However, on the other side, an opposing wall portion that can substantially contact the dustproof rib is provided, and when the upper and lower half cases are welded,
A plastic case, characterized in that, before the tips of the welded parts come into contact with each other, at least the internal space of the case and the welded part can be substantially separated by the dustproof ribs and the facing wall part. 【請求項２】請求項１に記載のプラスチックケースを磁
気テープカセットのカセットケースとして使用し、前記
突き合わせ部分には前記凹部の一部からなる内部空間を
形成し、かつ少なくとも前記内部空間とケース外部とを
連通する空気孔が形成された磁気テープカセット。2. The plastic case according to claim 1 is used as a cassette case of a magnetic tape cassette, and an internal space formed by a part of the recess is formed at the butting portion, and at least the internal space and the case exterior. Magnetic tape cassette with air holes that communicate with the.
JP1990105196U 1990-08-14 1990-10-08 plastic case Expired - Lifetime JPH087576Y2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP1990105196U JPH087576Y2 (en) 1990-10-08 1990-10-08 plastic case
US07/743,617 US5199593A (en) 1990-08-14 1991-08-12 Plastic case having improved ultrasonic welds between halves thereof and method for producing same
DE4126903A DE4126903A1 (en) 1990-08-14 1991-08-14 PLASTIC HOUSING WITH IMPROVED ULTRASONIC WELDED SEAMS BETWEEN THE HOUSING AND RELATED PRODUCTION PROCESS
US08/008,180 US5288350A (en) 1990-08-14 1993-01-25 Plastic case having improved ultrasonic welds between halves thereof and method for producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990105196U JPH087576Y2 (en) 1990-10-08 1990-10-08 plastic case

Publications (2)

Publication Number Publication Date
JPH0462564U JPH0462564U (en) 1992-05-28
JPH087576Y2 true JPH087576Y2 (en) 1996-03-04

Family

ID=31850804

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990105196U Expired - Lifetime JPH087576Y2 (en) 1990-08-14 1990-10-08 plastic case

Country Status (1)

Country Link
JP (1) JPH087576Y2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2593535Y2 (en) * 1992-05-22 1999-04-12 ティーディーケイ株式会社 Tape cassette
JP4651493B2 (en) * 2005-09-30 2011-03-16 ゼネラルテクノロジー株式会社 Ink cartridge housing structure

Also Published As

Publication number Publication date
JPH0462564U (en) 1992-05-28

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