JP2008215620A - Rotary damper and its manufacturing method - Google Patents

Rotary damper and its manufacturing method Download PDF

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JP2008215620A
JP2008215620A JP2008024862A JP2008024862A JP2008215620A JP 2008215620 A JP2008215620 A JP 2008215620A JP 2008024862 A JP2008024862 A JP 2008024862A JP 2008024862 A JP2008024862 A JP 2008024862A JP 2008215620 A JP2008215620 A JP 2008215620A
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body case
lid
main body
rotary damper
partition wall
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JP5090949B2 (en
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Hidenori Sugano
秀則 菅野
Yoshihiko Nagashima
良彦 長島
Masanori Itagaki
正典 板垣
Ryota Shimura
良太 志村
Takao Fukukawa
孝雄 福川
Satoshi Nagasaka
智 長坂
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Somic Ishikawa KK
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Somic Ishikawa KK
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    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91212—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods involving measurement means being part of the welding jaws, e.g. integrated in the welding jaws
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • 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
    • B29C66/112—Single lapped 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
    • B29C66/11—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
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • 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
    • B29C66/61—Joining from or joining on the inside
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91211—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods
    • B29C66/91216—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature 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
    • B29C66/70—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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/721—Vibration dampening equipment, e.g. shock absorbers

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary damper capable of improving braking characteristics, by restraining deformation of a cover without reducing the volume of a chamber filled with a viscous liquid. <P>SOLUTION: The rotary damper has a partition wall 3 arranged between a body case 1 and a rotor 2, the viscous liquid filled in the chamber 4 partitioned by the partition wall 3, a vane 5 pressing the viscous liquid by rotating together with the rotor 2, and the cover 6 blocking up an opening part of the body case 1, and is characterized by welding the cover 6 not only to the body case 1 but also to the partition wall 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、ロータリーダンパ及びその製造方法に関するものである。   The present invention relates to a rotary damper and a method for manufacturing the same.

従来、本体ケースとロータとの間に設けられる隔壁と、該隔壁により仕切られた室内に充填される粘性液体と、前記ロータと共に回転して前記粘性液体を押圧するベーンと、前記本体ケースの開口部を閉塞する蓋とを有するロータリーダンパが知られている。かかるロータリーダンパは、ベーンが粘性液体を押圧することによって生じる粘性液体の抵抗により、ロータの回転速度を減速させるものである。   Conventionally, a partition wall provided between the main body case and the rotor, a viscous liquid filled in a chamber partitioned by the partition wall, a vane that rotates together with the rotor and presses the viscous liquid, and an opening of the main body case There is known a rotary damper having a lid for closing the part. Such a rotary damper reduces the rotational speed of the rotor by the resistance of the viscous liquid generated when the vane presses the viscous liquid.

しかしながら、従来のロータリーダンパでは、蓋の周縁部が本体ケースに固定される構造であるため、大きな制動力を発生させようとすると、粘性液体の圧力によってその周縁部以外の部分がその周縁部より隆起するように蓋が変形し、それにより、蓋と隔壁との間隙が拡大して、制動力が低下するという問題があった。   However, since the conventional rotary damper has a structure in which the peripheral edge of the lid is fixed to the main body case, when a large braking force is generated, a portion other than the peripheral edge is caused by the pressure of the viscous liquid from the peripheral edge. There was a problem that the lid was deformed so as to be raised, whereby the gap between the lid and the partition wall was enlarged, and the braking force was reduced.

下記特許文献１の図３には、ロータ（２２０）にフランジ（２６０）を設けて、該フランジを蓋（２１２）と隔壁（２１１ｅ）との間に介在させる構成が記載されている。かかる構成によれば、蓋の変形を抑制することができる。しかし、かかる構成では、粘性液体が充填される室（２３０，２３１）の容積が減少することになり、制動特性の低下を招くことになる。また、粘性液体の圧力によりフランジが蓋に圧接され、摩擦抵抗が生じるため、制動特性が安定しないという問題があった。   FIG. 3 of Patent Document 1 below describes a configuration in which a flange (260) is provided on a rotor (220) and the flange is interposed between a lid (212) and a partition wall (211e). According to such a configuration, deformation of the lid can be suppressed. However, in such a configuration, the volume of the chambers (230, 231) filled with the viscous liquid is reduced, and the braking characteristics are deteriorated. Further, since the flange is pressed against the lid by the pressure of the viscous liquid and frictional resistance is generated, there is a problem that the braking characteristic is not stable.

下記特許文献１の図９には、蓋（４２０）の厚さを厚くする構成が記載されている。かかる構成によっても、蓋の変形を抑制することができる。しかし、かかる構成も、粘性液体が充填される室（４６０）の容積が減少することになるため、制動特性の低下を招くことになる。   FIG. 9 of Patent Document 1 below describes a configuration in which the thickness of the lid (420) is increased. Also with this configuration, deformation of the lid can be suppressed. However, such a configuration also reduces the volume of the chamber (460) filled with the viscous liquid, resulting in a reduction in braking characteristics.

下記特許文献１に記載されたように、従来のロータリーダンパでは、本体ケースと蓋との間隙を通じて粘性液体が外部へ漏出することを防止するため、Oリングが用いられている。したがって、必然的に本体ケースの開口部が円形となり、異形の開口部を有する本体ケースを採用できなかった。   As described in Patent Document 1 below, in a conventional rotary damper, an O-ring is used to prevent the viscous liquid from leaking outside through a gap between the main body case and the lid. Therefore, the opening of the main body case is inevitably circular, and a main body case having an irregular opening cannot be employed.

下記特許文献２及び特許文献３には、超音波溶着により、蓋の周縁部を本体ケースに溶着することが記載されている。しかしながら、超音波溶着には、溶着箇所に粘性液体が付着すると、溶着不良を引き起こし易いという欠点がある。従来の溶着方法では、部分的に溶着不良が生じていても、それが外観上現出しないため、製造ライン上で溶着不良を検出することが困難であった。   Patent Document 2 and Patent Document 3 below describe that the peripheral edge of the lid is welded to the main body case by ultrasonic welding. However, ultrasonic welding has a drawback that if a viscous liquid adheres to the welding location, it tends to cause poor welding. In the conventional welding method, even if there is a partial welding failure, it does not appear in appearance, so it is difficult to detect the welding failure on the production line.

特開２００２−３７２０８５号公報Japanese Patent Laid-Open No. 2002-372085 特開平５−２４０２８４号公報JP-A-5-240284 特開２００６−１１２５３８号公報JP 2006-112538 A

本発明が解決しようとする課題は、粘性液体が充填される室の容積を減少させることなく蓋の変形を抑制し、それにより、制動特性の向上を図ることができるロータリーダンパ及びその製造方法を提供することである。   The problem to be solved by the present invention is to provide a rotary damper capable of suppressing deformation of the lid without reducing the volume of the chamber filled with the viscous liquid and thereby improving the braking characteristics, and a method for manufacturing the same. Is to provide.

本発明は、上記課題を解決するため、以下のロータリーダンパ及びその製造方法を提供する。
１．本体ケースとロータとの間に設けられる隔壁と、該隔壁により仕切られた室内に充填される粘性液体と、前記ロータと共に回転して前記粘性液体を押圧するベーンと、前記本体ケースの開口部を閉塞する蓋とを有するロータリーダンパであって、前記蓋が、前記本体ケースのみならず、前記隔壁にも溶着されていることを特徴とするロータリーダンパ。
２．前記蓋が、レーザ溶着により、前記本体ケース及び前記隔壁に溶着されていることを特徴とする前記１に記載のロータリーダンパ。
３．前記蓋が、前記本体ケースに螺合された後、レーザ溶着により、前記本体ケース及び前記隔壁に溶着されていることを特徴とする前記１に記載のロータリーダンパ。
４．前記蓋が、レーザ光を透過する性質を有する熱可塑性樹脂から成り、前記本体ケース及び前記隔壁が、レーザ光を吸収する性質を有する熱可塑性樹脂から成り、前記蓋、本体ケース及び隔壁の各融点が略同一であることを特徴とする前記２又は３に記載のロータリーダンパ。
５．レーザ溶着により形成される連続した溶着部によって、前記本体ケースと前記蓋との間隙を通じた粘性液体の漏出が防止されることを特徴とする前記２から４のいずれか１に記載のロータリーダンパ。
６．本体ケースとロータとの間に設けられる隔壁と、該隔壁により仕切られた室内に充填される粘性液体と、前記ロータと共に回転して前記粘性液体を押圧するベーンと、前記本体ケースの開口部を閉塞する蓋とを有するロータリーダンパの製造方法であって、前記蓋を、前記本体ケースのみならず、前記隔壁にも溶着する工程を含むことを特徴とするロータリーダンパの製造方法。
７．前記蓋を、レーザ溶着により、前記本体ケース及び前記隔壁に溶着することを特徴とする前記６に記載のロータリーダンパの製造方法。
８．前記蓋を、前記本体ケースに螺合した後、レーザ溶着により、前記本体ケース及び前記隔壁に溶着することを特徴とする前記６に記載のロータリーダンパの製造方法。
９．レーザ溶着時に、レーザ光により加熱された部位から発せられる赤外線に基づいて当該部位の温度を計測する工程を含むことを特徴とする前記７又は８に記載のロータリーダンパの製造方法。 In order to solve the above-described problems, the present invention provides the following rotary damper and method for manufacturing the same.
1. A partition provided between the body case and the rotor, a viscous liquid filled in a chamber partitioned by the partition, a vane that rotates together with the rotor and presses the viscous liquid, and an opening of the body case A rotary damper having a closing lid, wherein the lid is welded not only to the main body case but also to the partition wall.
2. 2. The rotary damper according to 1 above, wherein the lid is welded to the main body case and the partition wall by laser welding.
3. 2. The rotary damper according to 1 above, wherein the lid is welded to the main body case and the partition wall by laser welding after being screwed into the main body case.
4). The lid is made of a thermoplastic resin having a property of transmitting laser light, the main body case and the partition wall are made of a thermoplastic resin having a property of absorbing laser light, and each melting point of the lid, the body case and the partition wall The rotary damper as described in 2 or 3 above, wherein:
5. 5. The rotary damper according to any one of 2 to 4 above, wherein leakage of viscous liquid through a gap between the main body case and the lid is prevented by a continuous welding portion formed by laser welding.
6). A partition provided between the body case and the rotor, a viscous liquid filled in a chamber partitioned by the partition, a vane that rotates together with the rotor and presses the viscous liquid, and an opening of the body case A method of manufacturing a rotary damper having a lid for closing, the method comprising the step of welding the lid to not only the main body case but also the partition.
7). 7. The method of manufacturing a rotary damper according to claim 6, wherein the lid is welded to the main body case and the partition wall by laser welding.
8). 7. The method of manufacturing a rotary damper according to claim 6, wherein the lid is screwed to the main body case and then welded to the main body case and the partition wall by laser welding.
9. 9. The method of manufacturing a rotary damper as described in 7 or 8 above, comprising a step of measuring the temperature of the part based on infrared rays emitted from the part heated by the laser beam at the time of laser welding.

前記１に記載の本発明によれば、蓋が、本体ケースのみならず、隔壁にも溶着されるため、蓋の周縁部が本体ケースに溶着されることに加えて、蓋の径方向にも蓋と隔壁の溶着部（溶着された部分）が形成されることになる。したがって、蓋の周縁部のみが本体ケースに溶着される構造と比較して、粘性液体の圧力により蓋が変形する度合いを小さくすることが可能になる。その結果、厚さの薄い蓋を採用することが可能になるため、粘性液体が充填される室の容積を十分に確保できる。その上、蓋が変形し難いので、大きな制動力を発生させることが可能になる。
前記２に記載の本発明によれば、溶着箇所に粘性液体が付着していても、強固に溶着することが可能になる。
前記３に記載の本発明によれば、本体ケースに螺合される蓋の緩みを防止でき、また、蓋と隔壁との間の隙間の大きさを調節することが可能になる。
前記４に記載の本発明によれば、本体ケース及び隔壁に対して、蓋を容易かつ確実に溶着することが可能になる。また、高温下での使用において、蓋、本体ケース及び隔壁が軟化した場合でも、蓋の変形を抑制して制動力の低下を防止し得る。
前記５に記載の本発明によれば、レーザ溶着により形成される連続した溶着部により、蓋と本体ケース及び隔壁との接合強度を高めることができる。また、当該溶着部によって、本体ケースと蓋との間隙を通じた粘性液体の漏出が防止されるため、Ｏリング等のシール部材を不要にできる。さらに、Ｏリングが不要になるため、本体ケースの開口部が円形である必要性がなく、異形の開口部を有する本体ケースを採用することが可能になる。
前記６に記載の本発明によれば、粘性液体が充填される室の容積を減少させることなく蓋の変形を抑制し、それにより、制動特性の向上を図ることができるロータリーダンパを提供することが可能になる。
前記７に記載の本発明によれば、溶着箇所に粘性液体が付着することによって引き起こされる溶着不良をなくすことができ、しかも、蓋を強固に溶着することが可能になる。
前記８に記載の本発明によれば、本体ケースに螺合される蓋の緩みを防止でき、また、蓋と隔壁との間の隙間の大きさを調節することが可能になる。
前記９に記載の本発明によれば、部分的に溶着不良が生じた場合に、それを製造ライン上で検出することが可能になる。 According to the first aspect of the present invention, since the lid is welded not only to the main body case but also to the partition wall, in addition to the peripheral edge portion of the lid being welded to the main body case, also in the radial direction of the lid. A welded portion (welded portion) between the lid and the partition wall is formed. Therefore, it is possible to reduce the degree of deformation of the lid due to the pressure of the viscous liquid as compared with the structure in which only the peripheral edge of the lid is welded to the main body case. As a result, it is possible to employ a thin lid, so that a sufficient volume of the chamber filled with the viscous liquid can be secured. In addition, since the lid is difficult to deform, a large braking force can be generated.
According to the second aspect of the present invention, even if a viscous liquid adheres to the welding location, it is possible to weld firmly.
According to the third aspect of the present invention, it is possible to prevent loosening of the lid screwed into the main body case, and it is possible to adjust the size of the gap between the lid and the partition wall.
According to the present invention described in 4 above, the lid can be easily and reliably welded to the main body case and the partition wall. Further, even when the lid, the main body case, and the partition wall are softened during use at a high temperature, the deformation of the lid can be suppressed to prevent a reduction in braking force.
According to the fifth aspect of the present invention, the bonding strength between the lid, the main body case, and the partition wall can be increased by the continuous welding portion formed by laser welding. Further, the welded portion prevents the viscous liquid from leaking through the gap between the main body case and the lid, so that a seal member such as an O-ring can be dispensed with. Further, since the O-ring is not required, the opening of the main body case does not need to be circular, and a main body case having a deformed opening can be employed.
According to the sixth aspect of the present invention, there is provided a rotary damper capable of suppressing the deformation of the lid without reducing the volume of the chamber filled with the viscous liquid and thereby improving the braking characteristics. Is possible.
According to the present invention described in 7 above, it is possible to eliminate welding defects caused by the viscous liquid adhering to the welding location, and to firmly weld the lid.
According to the present invention described in 8 above, it is possible to prevent loosening of the lid screwed into the main body case, and it is possible to adjust the size of the gap between the lid and the partition wall.
According to the present invention described in 9 above, when a welding failure occurs partially, it can be detected on the production line.

以下、本発明の実施の形態を図面に示した実施例に従って説明する。   Hereinafter, embodiments of the present invention will be described with reference to examples shown in the drawings.

図１は本実施例に係るロータリーダンパを示す平面図、図２は本実施例に係るロータリーダンパを示す正面図、図３は図２におけるＣ−Ｃ部断面図、図４は図１におけるＡ−Ａ部断面図、図５は図１におけるＢ−Ｂ部断面図、図６は図５におけるＤ部拡大図である。これらの図に示したように、本実施例に係るロータリーダンパは、本体ケース１とロータ２との間に設けられる隔壁３と、隔壁３により仕切られた室４内に充填される粘性液体と、ロータ２と共に回転して粘性液体を押圧するベーン５と、本体ケース１の開口部を閉塞する蓋６とを有して構成される。   1 is a plan view showing a rotary damper according to this embodiment, FIG. 2 is a front view showing the rotary damper according to this embodiment, FIG. 3 is a cross-sectional view taken along the line CC in FIG. 2, and FIG. FIG. 5 is a cross-sectional view taken along the line A-B, FIG. 5 is a cross-sectional view taken along the line B-B in FIG. 1, and FIG. As shown in these drawings, the rotary damper according to the present embodiment includes a partition wall 3 provided between the main body case 1 and the rotor 2, and a viscous liquid filled in a chamber 4 partitioned by the partition wall 3. The vane 5 rotates together with the rotor 2 to press the viscous liquid, and the lid 6 closes the opening of the main body case 1.

本体ケース１は、一端が開口し、他端が底壁１ａにより閉塞されている。ロータ２は、一端に第１の溝２ａを有し、他端に第２の溝２ｂを有する。ロータ２は、図４に示したように、第１の溝２ａに、本体ケース１の底壁１ａから突出する突起１ｂが嵌り込み、第２の溝２ｂに、蓋６の下面から突出する突起６ａが嵌り込むことにより、本体ケース１内で回転可能に支持される。第１の溝２ａ付近及び第２の溝２ｂ付近には、本体ケース１とロータ２との間隙及び蓋６とロータ２との間隙を通じて粘性液体が外部へ漏出することを防止するため、Ｏリング７が配設されている。隔壁３は、本体ケース１と一体に成形されている。ベーン５は、ロータ２と一体に成形されている。   The main body case 1 has one end opened and the other end closed by a bottom wall 1a. The rotor 2 has a first groove 2a at one end and a second groove 2b at the other end. As shown in FIG. 4, the rotor 2 has a protrusion 1b protruding from the bottom wall 1a of the main body case 1 in the first groove 2a, and a protrusion protruding from the lower surface of the lid 6 in the second groove 2b. When 6a is fitted, it is rotatably supported in the main body case 1. In the vicinity of the first groove 2 a and the second groove 2 b, an O-ring is provided in order to prevent the viscous liquid from leaking outside through the gap between the main body case 1 and the rotor 2 and the gap between the lid 6 and the rotor 2. 7 is disposed. The partition wall 3 is formed integrally with the main body case 1. The vane 5 is formed integrally with the rotor 2.

蓋６は、本体ケース１のみならず、隔壁３にも溶着される。溶着手段としては、レーザ溶着を採用することが好ましい。本実施例では、蓋６を、レーザ溶着により、本体ケース１及び隔壁３に溶着するために、蓋６には、レーザ光を透過する性質を有するものを用い、本体ケース１及び隔壁３には、レーザ光を吸収する性質を有するものを用いている。蓋６、本体ケース１及び隔壁３は、相互に融点が同一の熱可塑性樹脂からなるものを用いることが好ましい。   The lid 6 is welded not only to the main body case 1 but also to the partition wall 3. As the welding means, it is preferable to employ laser welding. In this embodiment, in order to weld the lid 6 to the main body case 1 and the partition wall 3 by laser welding, the lid 6 has a property of transmitting laser light, and the main body case 1 and the partition wall 3 are used. In addition, a laser beam absorbing property is used. The lid 6, the main body case 1 and the partition wall 3 are preferably made of thermoplastic resins having the same melting point.

レーザ溶着には、被溶着物に対してレーザ光を照射でき、かつレーザ溶着時に、レーザ光により加熱された部位から発せられる赤外線に基づいて当該部位の温度を計測し得る装置を用いることが好ましい。本実施例では、図７に示したように、レーザ光出力部８と赤外線入力部９とが一体的に構成された装置が用いられる。レーザ光出力部８から出力されたレーザ光１０は、途中で屈折するように照射角度が調整され、蓋６の上面に照射され、蓋６を透過して本体ケース１又は隔壁３に到達し、本体ケース１又は隔壁３を加熱する。レーザ光１０により本体ケース１又は隔壁３が加熱されることにより発生する赤外線１１は、図８に示したように、赤外線入力部９に入力される。溶着部（溶着された部分）１２の温度は、赤外線入力部９に入力された赤外線１１に基づいて計測される。この装置によれば、同軸上でレーザ光１０の照射と赤外線１１の入力が可能であるため、溶着部１２の温度測定が溶着と同時にできる。   For laser welding, it is preferable to use an apparatus that can irradiate an object to be welded with laser light and can measure the temperature of the part based on infrared rays emitted from the part heated by the laser light during laser welding. . In the present embodiment, as shown in FIG. 7, an apparatus in which a laser beam output unit 8 and an infrared input unit 9 are integrally formed is used. The irradiation angle of the laser beam 10 output from the laser beam output unit 8 is adjusted so as to be refracted in the middle, and is irradiated on the upper surface of the lid 6, passes through the lid 6 and reaches the main body case 1 or the partition wall 3. The main body case 1 or the partition wall 3 is heated. Infrared rays 11 generated when the main body case 1 or the partition walls 3 are heated by the laser beam 10 are input to the infrared input unit 9 as shown in FIG. The temperature of the welded portion (welded portion) 12 is measured based on the infrared rays 11 input to the infrared input portion 9. According to this apparatus, it is possible to irradiate the laser beam 10 and input the infrared ray 11 on the same axis, so that the temperature of the welded portion 12 can be measured simultaneously with the welding.

本体ケース１上に蓋６を載置し、蓋６の周縁部にレーザ光１０を照射すると、図６に示したように、蓋６の下面と本体ケース１の端面とが接する部分に溶着部１２が形成される。かかる溶着部１２は、図３において太線で示したように、本体ケース１の外周端面上及び隔壁３の端面上に連続して形成されることが好ましい。これにより、本体ケース１と蓋６との間隙を通じた粘性液体の漏出が防止される。   When the lid 6 is placed on the main body case 1 and the peripheral edge of the lid 6 is irradiated with the laser beam 10, as shown in FIG. 6, the welded portion is formed at the portion where the lower surface of the lid 6 and the end surface of the main body case 1 are in contact. 12 is formed. Such a welded portion 12 is preferably formed continuously on the outer peripheral end surface of the main body case 1 and on the end surface of the partition wall 3 as indicated by a thick line in FIG. 3. Thereby, leakage of the viscous liquid through the gap between the main body case 1 and the lid 6 is prevented.

上記のように構成されるロータリーダンパは、ロータ２と共にベーン５が回転し、粘性液体を押圧すると、粘性液体は、ベーン５と本体ケース１との間の僅かな隙間を通じて移動することになる。この際、粘性液体の抵抗が発生し、その抵抗により、ロータ２の回転速度が減速されることになる。   In the rotary damper configured as described above, when the vane 5 rotates together with the rotor 2 and presses the viscous liquid, the viscous liquid moves through a slight gap between the vane 5 and the main body case 1. At this time, resistance of the viscous liquid is generated, and the rotational speed of the rotor 2 is reduced by the resistance.

かかるロータリーダンパに大きな制動力を発揮させようとする場合、蓋６の下面に粘性液体の大きな圧力が付与されることになる。この際、本実施例によれば、蓋６が、本体ケース１のみならず、隔壁３にも溶着され、蓋６の周縁部に本体ケース１との溶着部１２が形成されるとともに、蓋６の径方向にも蓋６と隔壁３の溶着部１２が形成されるため、蓋６の周縁部のみが本体ケース１に溶着される構造と比較して、蓋６が変形する度合いが非常に小さい。したがって、厚さの薄い蓋６を採用して、粘性液体が充填される室４の容積を十分に確保できるとともに、大きな制動力を発生させることが可能になる。   When attempting to exert a large braking force on the rotary damper, a large pressure of the viscous liquid is applied to the lower surface of the lid 6. At this time, according to the present embodiment, the lid 6 is welded not only to the main body case 1 but also to the partition wall 3, the welded portion 12 with the main body case 1 is formed at the peripheral edge of the lid 6, and the lid 6 Since the welded portion 12 of the lid 6 and the partition wall 3 is also formed in the radial direction, the degree of deformation of the lid 6 is very small as compared with the structure in which only the peripheral edge of the lid 6 is welded to the main body case 1. . Therefore, by adopting the thin lid 6, it is possible to secure a sufficient volume of the chamber 4 filled with the viscous liquid and to generate a large braking force.

また、本実施例によれば、蓋６がレーザ溶着により本体ケース１及び隔壁３に溶着されるため、溶着箇所に粘性液体が付着していても、それが原因で溶着不良となることがなく、蓋６を強固に溶着することができる。   Further, according to the present embodiment, since the lid 6 is welded to the main body case 1 and the partition wall 3 by laser welding, even if viscous liquid adheres to the welding location, it does not cause poor welding due to it. The lid 6 can be firmly welded.

また、蓋６、本体ケース１及び隔壁３が熱可塑性樹脂から構成される場合に、高温（例えば、８０℃）の下で使用されると、蓋６等が軟化して変形し易くなるが、蓋６が本体ケース１のみならず、隔壁３にも溶着されることにより、蓋６の変形が抑制されるので、制動力の低下を防止することができる。   In addition, when the lid 6, the main body case 1 and the partition wall 3 are made of a thermoplastic resin, the lid 6 and the like are softened and easily deformed when used under a high temperature (for example, 80 ° C.) Since the lid 6 is welded not only to the main body case 1 but also to the partition wall 3, deformation of the lid 6 is suppressed, so that a reduction in braking force can be prevented.

また、本実施例によれば、レーザ溶着により形成される連続した溶着部１２により、蓋６と本体ケース１及び隔壁３との接合強度を高めることができる。また、当該溶着部１２によって、本体ケース１と蓋６との間隙を通じた粘性液体の漏出が防止されるため、蓋６と本体ケース１との間に設けられるＯリングを不要にできる。さらに、Ｏリングが不要になるため、本体ケース１の開口部が円形である必要性がなく、図３に示したように、異形の開口部を有する本体ケース１を採用することができる。   Moreover, according to the present Example, the joining strength of the lid | cover 6, the main body case 1, and the partition 3 can be raised with the continuous welding part 12 formed by laser welding. Moreover, since the welded portion 12 prevents the viscous liquid from leaking through the gap between the main body case 1 and the lid 6, an O-ring provided between the lid 6 and the main body case 1 can be eliminated. Further, since the O-ring is not required, the opening of the main body case 1 does not need to be circular, and the main body case 1 having an irregularly shaped opening can be employed as shown in FIG.

さらに、本実施例によれば、ロータリーダンパの製造工程において、レーザ溶着時に、レーザ光１０により加熱された部位から発せられる赤外線１１に基づいて当該部位の温度を計測する工程を含むため、部分的に溶着不良が生じた場合に、それを製造ライン上で検出することができる。すなわち、蓋６と本体ケース１又は蓋６と隔壁３が十分かつ確実に溶着されている場合には、溶着される面同士が密着して熱を逃がすため、融点付近の温度が計測されることになるが、溶着が不十分な場合には、溶着される面同士の間に隙間が生じているので、熱を逃がすことができず、融点より高い温度が計測されることになる。したがって、相対的に融点より高い温度が計測された場合には、溶着不良が生じているものと判断して、製造ライン上で排除することができる。   Further, according to the present embodiment, the rotary damper manufacturing process includes a step of measuring the temperature of the part based on the infrared rays 11 emitted from the part heated by the laser beam 10 during laser welding. If a welding failure occurs, it can be detected on the production line. That is, when the lid 6 and the main body case 1 or the lid 6 and the partition wall 3 are sufficiently and reliably welded, the surfaces to be welded adhere to each other to release heat, so that the temperature near the melting point is measured. However, when the welding is insufficient, there is a gap between the surfaces to be welded, so heat cannot be released and a temperature higher than the melting point is measured. Therefore, if a temperature relatively higher than the melting point is measured, it can be determined that a welding failure has occurred and can be eliminated on the production line.

図９は本実施例に係るロータリーダンパを示す平面図、図１０は本実施例に係るロータリーダンパの内部構造を示す図、図１１は本実施例に係るロータリーダンパの部分拡大断面図である。これらの図に示したように、本実施例に係るロータリーダンパも、実施例１に係るロータリーダンパと同様に、本体ケース１とロータ２との間に設けられる隔壁３と、隔壁３により仕切られた室４内に充填される粘性液体と、ロータ２と共に回転して粘性液体を押圧するベーン５と、本体ケース１の開口部を閉塞する蓋６とを有して構成される。   FIG. 9 is a plan view showing the rotary damper according to the present embodiment, FIG. 10 is a view showing the internal structure of the rotary damper according to the present embodiment, and FIG. 11 is a partially enlarged sectional view of the rotary damper according to the present embodiment. As shown in these drawings, the rotary damper according to the present embodiment is also partitioned by the partition wall 3 and the partition wall 3 provided between the main body case 1 and the rotor 2 in the same manner as the rotary damper according to the first embodiment. The chamber 4 includes a viscous liquid, a vane 5 that rotates together with the rotor 2 to press the viscous liquid, and a lid 6 that closes the opening of the main body case 1.

本実施例に係るロータリーダンパは、蓋６が本体ケース１に螺合された後、該蓋６が本体ケース１及び隔壁３に溶着される点で、実施例１に係るロータリーダンパと相違する。   The rotary damper according to the present embodiment is different from the rotary damper according to the first embodiment in that the lid 6 is welded to the main body case 1 and the partition wall 3 after the lid 6 is screwed to the main body case 1.

すなわち、蓋６には雄ねじが形成され、本体ケース１には雌ねじが形成されており、蓋６の雄ねじと本体ケース１の雌ねじを嵌め合わせることにより、蓋６が一次的に本体ケース１に固定される。このように、蓋６と本体ケース１をねじにより結合させることは、従来周知の技術である。しかしながら、かかる結合方法を採用しただけでは、本体ケース１に螺合された蓋６に緩みが生じる。そこで、従来、蓋と本体ケースを結合させた後、熱によってねじ部を溶かしたり、接着剤を用いて、蓋の雄ねじと本体ケースの雌ねじとを接着したりして、蓋の緩みを防止していた。しかしながら、従来の方法では、蓋の緩みしか防止できず、蓋の変形を抑制することはできなかった。   That is, the lid 6 is formed with a male screw and the main body case 1 is formed with a female screw, and the lid 6 is temporarily fixed to the main body case 1 by fitting the male screw of the lid 6 with the female screw of the main body case 1 Is done. Thus, it is a conventionally well-known technique to couple | bond the cover 6 and the main body case 1 with a screw | thread. However, if only such a coupling method is employed, the lid 6 screwed into the main body case 1 is loosened. Therefore, conventionally, after the lid and the main body case are joined, the screw part is melted by heat, or the male screw of the lid and the female screw of the main body case are bonded using an adhesive to prevent the lid from loosening. It was. However, the conventional method can only prevent the lid from loosening and cannot suppress the deformation of the lid.

本実施例では、蓋６を本体ケース１に螺合させた後、レーザ溶着により、該蓋６を本体ケース１及び隔壁３に溶着する。図９において破線で示した部分及び図１０において太線で示した部分がレーザによる溶着部１２である。   In this embodiment, after the lid 6 is screwed to the main body case 1, the lid 6 is welded to the main body case 1 and the partition wall 3 by laser welding. A portion indicated by a broken line in FIG. 9 and a portion indicated by a thick line in FIG.

本実施例によれば、蓋６が上記のように本体ケース１及び隔壁３に溶着されるため、ねじ部１３（蓋の雄ねじと本体ケースの雌ねじとが嵌合した部分）を溶かしたり、接着剤で接着しなくても、蓋６の緩みを防止でき、制動力の低下を防ぐことができる。また、蓋６が隔壁３にも溶着されるため、制動力を発揮するときの内圧により蓋６が変形することを抑制することができる。さらに、実施例１と比較したときの利点は、蓋６を本体ケース１に螺合させるときに、蓋６と隔壁３との間の隙間の大きさを調節できる点である。本実施例では、蓋６と隔壁３との間の距離を、レーザ溶着が可能な範囲（例えば、０から０．０５ｍｍの範囲）で調節することができるので、それによって制動力の調節が可能になる。   According to this embodiment, since the lid 6 is welded to the main body case 1 and the partition wall 3 as described above, the screw portion 13 (the portion where the male screw of the lid and the female screw of the main body case are fitted) is melted or bonded. Even if it is not bonded with an agent, the lid 6 can be prevented from loosening, and a reduction in braking force can be prevented. Moreover, since the lid | cover 6 is welded also to the partition 3, it can suppress that the lid | cover 6 deform | transforms with the internal pressure when exhibiting braking force. Furthermore, the advantage compared with Example 1 is that the size of the gap between the lid 6 and the partition wall 3 can be adjusted when the lid 6 is screwed into the main body case 1. In this embodiment, the distance between the lid 6 and the partition wall 3 can be adjusted within a range in which laser welding can be performed (for example, a range of 0 to 0.05 mm), so that the braking force can be adjusted. become.

実施例１に係るロータリーダンパを示す平面図である。1 is a plan view illustrating a rotary damper according to Embodiment 1. FIG. 実施例１に係るロータリーダンパを示す正面図である。1 is a front view showing a rotary damper according to Embodiment 1. FIG. 図２におけるＣ−Ｃ部断面図である。It is CC sectional view taken on the line in FIG. 図１におけるＡ−Ａ部断面図である。It is an AA section sectional view in FIG. 図１におけるＢ−Ｂ部断面図である。It is a BB section sectional view in FIG. 図５におけるＤ部拡大図である。It is the D section enlarged view in FIG. 実施例１に係るロータリーダンパの製造方法を説明するための概略図である。FIG. 5 is a schematic diagram for explaining a method for manufacturing the rotary damper according to the first embodiment. 実施例１に係るロータリーダンパの製造方法を説明するための概略図である。FIG. 5 is a schematic diagram for explaining a method for manufacturing the rotary damper according to the first embodiment. 実施例２に係るロータリーダンパを示す平面図である。6 is a plan view showing a rotary damper according to Embodiment 2. FIG. 実施例２に係るロータリーダンパの内部構造を示す図である。FIG. 6 is a diagram illustrating an internal structure of a rotary damper according to a second embodiment. 実施例２に係るロータリーダンパの部分拡大断面図である。6 is a partially enlarged cross-sectional view of a rotary damper according to Embodiment 2. FIG.

符号の説明Explanation of symbols

１ 本体ケース
１ａ 底壁
１ｂ 突起
２ ロータ
２ａ 第１の溝
２ｂ 第２の溝
３ 隔壁
４ 室
５ ベーン
６ 蓋
６ａ 突起
７ Ｏリング
８ レーザ光出力部
９ 赤外線入力部
１０ レーザ光
１１ 赤外線
１２ 溶着部
１３ ねじ部 DESCRIPTION OF SYMBOLS 1 Main body case 1a Bottom wall 1b Protrusion 2 Rotor 2a 1st groove 2b 2nd groove 3 Partition 4 Chamber 5 Vane 6 Lid 6a Protrusion 7 O-ring 8 Laser light output part 9 Infrared input part 10 Laser light 11 Infrared ray 12 Weld part 13 Screw part

Claims (9)

本体ケースとロータとの間に設けられる隔壁と、該隔壁により仕切られた室内に充填される粘性液体と、前記ロータと共に回転して前記粘性液体を押圧するベーンと、前記本体ケースの開口部を閉塞する蓋とを有するロータリーダンパであって、前記蓋が、前記本体ケースのみならず、前記隔壁にも溶着されていることを特徴とするロータリーダンパ。   A partition provided between the body case and the rotor, a viscous liquid filled in a chamber partitioned by the partition, a vane that rotates together with the rotor and presses the viscous liquid, and an opening of the body case A rotary damper having a closing lid, wherein the lid is welded not only to the main body case but also to the partition wall. 前記蓋が、レーザ溶着により、前記本体ケース及び前記隔壁に溶着されていることを特徴とする請求項１に記載のロータリーダンパ。   The rotary damper according to claim 1, wherein the lid is welded to the main body case and the partition wall by laser welding. 前記蓋が、前記本体ケースに螺合された後、レーザ溶着により、前記本体ケース及び前記隔壁に溶着されていることを特徴とする請求項１に記載のロータリーダンパ。   The rotary damper according to claim 1, wherein the lid is welded to the main body case and the partition wall by laser welding after being screwed into the main body case. 前記蓋が、レーザ光を透過する性質を有する熱可塑性樹脂から成り、前記本体ケース及び前記隔壁が、レーザ光を吸収する性質を有する熱可塑性樹脂から成り、前記蓋、本体ケース及び隔壁の各融点が同一であることを特徴とする請求項２又は３に記載のロータリーダンパ。   The lid is made of a thermoplastic resin having a property of transmitting laser light, the main body case and the partition wall are made of a thermoplastic resin having a property of absorbing laser light, and each melting point of the lid, the body case and the partition wall The rotary damper according to claim 2 or 3, wherein レーザ溶着により形成される連続した溶着部によって、前記本体ケースと前記蓋との間隙を通じた粘性液体の漏出が防止されることを特徴とする請求項２から４のいずれか１に記載のロータリーダンパ。   The rotary damper according to any one of claims 2 to 4, wherein leakage of viscous liquid through a gap between the main body case and the lid is prevented by a continuous welding portion formed by laser welding. . 本体ケースとロータとの間に設けられる隔壁と、該隔壁により仕切られた室内に充填される粘性液体と、前記ロータと共に回転して前記粘性液体を押圧するベーンと、前記本体ケースの開口部を閉塞する蓋とを有するロータリーダンパの製造方法であって、前記蓋を、前記本体ケースのみならず、前記隔壁にも溶着する工程を含むことを特徴とするロータリーダンパの製造方法。   A partition provided between the body case and the rotor, a viscous liquid filled in a chamber partitioned by the partition, a vane that rotates together with the rotor and presses the viscous liquid, and an opening of the body case A method of manufacturing a rotary damper having a lid for closing, the method comprising the step of welding the lid to not only the main body case but also the partition. 前記蓋を、レーザ溶着により、前記本体ケース及び前記隔壁に溶着することを特徴とする請求項６に記載のロータリーダンパの製造方法。   The method for manufacturing a rotary damper according to claim 6, wherein the lid is welded to the main body case and the partition wall by laser welding. 前記蓋を、前記本体ケースに螺合した後、レーザ溶着により、前記本体ケース及び前記隔壁に溶着することを特徴とする請求項６に記載のロータリーダンパの製造方法。   The method of manufacturing a rotary damper according to claim 6, wherein the lid is welded to the main body case and the partition wall by laser welding after being screwed into the main body case. レーザ溶着時に、レーザ光により加熱された部位から発せられる赤外線に基づいて当該部位の温度を計測する工程を含むことを特徴とする請求項７又は８に記載のロータリーダンパの製造方法。   9. The method of manufacturing a rotary damper according to claim 7, further comprising a step of measuring the temperature of the part based on infrared rays emitted from the part heated by the laser beam at the time of laser welding.
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JP2003506256A (en) * 1999-08-05 2003-02-18 株式会社ニフコ Oil-type cylindrical rotary damper
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