JP3413586B2 - Balloon mold - Google Patents
Balloon moldInfo
- Publication number
- JP3413586B2 JP3413586B2 JP20123697A JP20123697A JP3413586B2 JP 3413586 B2 JP3413586 B2 JP 3413586B2 JP 20123697 A JP20123697 A JP 20123697A JP 20123697 A JP20123697 A JP 20123697A JP 3413586 B2 JP3413586 B2 JP 3413586B2
- Authority
- JP
- Japan
- Prior art keywords
- balloon
- winding
- molding
- mold
- groove
- 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 - Fee Related
Links
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
- Endoscopes (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、バルーンを成形す
るための成形用金型、特に均一に膨らむことが要求され
る分野、例えば超音波内視鏡に使用するバルーンを成形
するための成形用金型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for molding a balloon, particularly in a field where uniform expansion is required, for example, a molding die for molding a balloon used in an ultrasonic endoscope. Regarding molds.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】身体の
診断に超音波を利用する方法が知られている。通常超音
波による診断は、超音波ビームを身体の表面から身体内
に向けて発信し、体内の病変部位の診断を行う。また、
近年、先端に超音波探触子を取り付けた内視鏡、すなわ
ち超音波内視鏡を用いて診断する方法が行われている。
この方法はカテーテルを使用して超音波内視鏡を身体の
内部に挿入し、超音波探触子から病変部位に向けて超音
波ビームを発信して診断する方法である。この超音波内
視鏡は、内視鏡の先端に超音波探触子を取り付け固定
し、この超音波探触子をバルーン（ゴム風船）で封入し
た構造を有する。2. Description of the Related Art A method of utilizing ultrasonic waves for body diagnosis is known. Usually, in the diagnosis by ultrasonic waves, an ultrasonic beam is emitted from the surface of the body toward the inside of the body to diagnose a lesion site in the body. Also,
In recent years, a method of diagnosing using an endoscope having an ultrasonic probe attached to its tip, that is, an ultrasonic endoscope has been performed.
This method is a method in which an ultrasonic endoscope is inserted into the body using a catheter and an ultrasonic beam is emitted from an ultrasonic probe toward a lesion site for diagnosis. This ultrasonic endoscope has a structure in which an ultrasonic probe is attached and fixed to the tip of the endoscope, and the ultrasonic probe is enclosed by a balloon (rubber balloon).
【０００３】すなわち、内視鏡の先端に超音波探触子を
取り付け固定し、この超音波探触子に、図３に示すごと
き両端に開口部２４、２５を有する小さな楕円形のバル
ーン２０、或は図５に示すごとき一端に開口部２９を有
する小さな楕円形の袋状のバルーン２６を、バルーン装
着アタッチメントを用いて装着する。このときバルーン
２０の場合は、バルーン２０の一方の巻き上げ部２２を
内視鏡の先端に設けられた溝に嵌め込んで固定し、バル
ーンの他端の巻き上げ部２３を超音波探触子の先端にバ
ルーン内が密封状態になるよう固定する。また、バルー
ン２６の場合には、バルーンの巻き上げ部２８を内視鏡
の先端に設けられた溝に嵌め込んで固定し、バルーン内
が密封状態になるようにする。That is, an ultrasonic probe is attached and fixed to the tip of the endoscope, and a small elliptical balloon 20 having openings 24 and 25 at both ends as shown in FIG. 3 is attached to the ultrasonic probe. Alternatively, a small oval bag-shaped balloon 26 having an opening 29 at one end as shown in FIG. 5 is attached using a balloon attachment. At this time, in the case of the balloon 20, one winding portion 22 of the balloon 20 is fitted and fixed in a groove provided at the tip of the endoscope, and the winding portion 23 at the other end of the balloon is fixed to the tip of the ultrasonic probe. Secure the inside of the balloon in a sealed state. In the case of the balloon 26, the winding portion 28 of the balloon is fitted and fixed in a groove provided at the tip of the endoscope so that the inside of the balloon is hermetically sealed.
【０００４】上記の超音波内視鏡を用いる診断には、超
音波内視鏡の先端に密封装着したバルーンに脱気水を注
入し膨脹させ、体腔壁へバルーンを密着させた状態で超
音波探触子から超音波ビームを発信して診断する方法が
取られている。この診断方法では、バルーンに脱気水を
供給したとき、バルーン２０は横方向にドーナツ状に膨
らみ、またバルーン２６は球状に膨らむが、いずれの場
合も、バルーンが横方向に均一に膨らむことが要求され
る。本出願人は先にこの要求を満たすバルーンを成形す
るための金型として、ほぼ楕円体のバルーン部成形部と
その長軸方向両端に連なる円柱状の巻き上げ部成形部と
を有し、バルーン部成形部と巻き上げ部成形部との間
に、巻き上げ部成形部の径より小さい径の溝部分を設け
たことを特徴とする超音波内視鏡用バルーン成形金型を
提案した（特開平８−１１８３７７号公報）。この提案
した金型を用いると、図３における開口部２４の開口面
と開口部２５の開口面とが平行になり、均一に膨らむバ
ルーンが製造できる。For diagnosis using the above-mentioned ultrasonic endoscope, deaerated water is injected into a balloon which is hermetically attached to the distal end of the ultrasonic endoscope to inflate the balloon, and ultrasonic waves are applied while the balloon is in close contact with the body cavity wall. A method is used in which ultrasonic waves are emitted from the probe to make a diagnosis. In this diagnostic method, when deaerated water is supplied to the balloon, the balloon 20 swells in a donut shape in the lateral direction and the balloon 26 swells in a spherical shape, but in any case, the balloon may swell evenly in the lateral direction. Required. The applicant has previously provided, as a mold for molding a balloon satisfying this requirement, a balloon part molding part having a substantially ellipsoidal shape and a cylindrical winding part molding part continuous at both ends in the longitudinal direction thereof. A balloon molding die for an ultrasonic endoscope is proposed in which a groove portion having a diameter smaller than the diameter of the winding portion molding portion is provided between the molding portion and the winding portion molding portion (JP-A-8- 118377). By using the proposed mold, the opening surface of the opening 24 and the opening surface of the opening 25 shown in FIG. 3 are parallel to each other, and a balloon which is inflated uniformly can be manufactured.
【０００５】金型を用いて成形したバルーンは、通常、
超短波探触子に取り付けて膨らましたときに横方向に均
一にドーナツ状或は球状に膨らまなく、偏った膨らみ方
をし、大きく膨らむ部分と小さく膨らむ部分が生じる。
そして、ドーナツ状に膨らましたときの取り付け部の中
心から膨らみが最も大きい外縁までの距離（最大半径）
と取り付け部の中心から膨らみが最も小さい外縁までの
距離（最小半径）との比をみることによって膨らみ方の
均一性（片膨らみ性）を測ることができる。すなわち、
片膨らみ値＝（最大半径）／（最小半径）で表すことが
できる。溝部分を設けない金型で成形したバルーンの片
膨らみ値は測定の結果３．０以上であった。そして上記
の溝部分を設けた金型を用いると、片膨らみ値が１．０
〜２．０の範囲内に納まるバルーンを得ることができ
た。しかし、片膨らみ値が１．０に近い範囲に納まるバ
ルーンの成形が要望されている。本発明は、上記の事情
に鑑みなされたもので、均一に膨らますことができ、上
記の片膨らみ値が１．０に近い範囲、具体的には１．０
〜１．２のの範囲内に納まる超音波内視鏡用バルーンを
製造することができる金型を提供することを目的とす
る。A balloon formed by using a mold is usually
When it is attached to an ultra-high frequency probe and expanded, it does not expand uniformly in a donut shape or spherical shape in the lateral direction, but it expands unevenly, and a large expansion part and a small expansion part occur.
And the distance (maximum radius) from the center of the mounting part when it bulges like a donut to the outer edge with the largest bulge
The uniformity of bulging (unilateral bulge) can be measured by looking at the ratio of the distance from the center of the mounting portion to the outer edge with the smallest bulge (minimum radius). That is,
One-sided bulge value = (maximum radius) / (minimum radius). As a result of the measurement, the partial bulge value of the balloon molded with a mold having no groove portion was 3.0 or more. When a mold provided with the above groove is used, the half-bulge value is 1.0.
It was possible to obtain a balloon that fits within the range of -2.0. However, there is a demand for forming a balloon having a one-sided bulge value within a range close to 1.0. The present invention has been made in view of the above circumstances, and can be uniformly expanded, and the above-mentioned one-sided expansion value is in a range close to 1.0, specifically 1.0.
An object of the present invention is to provide a mold capable of manufacturing a balloon for an ultrasonic endoscope that falls within the range of 1.2.
【０００６】[0006]
【課題を解決するための手段】本発明者は、先に、バル
ーンに脱気水を供給したときに、バルーンを横方向に均
一にドーナツ状に膨らませるには、バルーンを構成する
ゴムの膜厚が均一であることは勿論であるが、その他に
図３における開口部２４の開口面と開口部２５の開口面
とが平行であることが必要であり、この開口部２４の開
口面と開口部２５の開口面とが平行なバルーンを作るた
め、金型のバルーン部成形部と巻き上げ部成形部との間
に溝を設けることを提案した。そして、この溝を設けた
金型で成形したバルーンについて種々検討した結果、バ
ルーンを均一に膨らませるためには、バルーン部とバル
ーン巻き上げ部との密着する部分（図３、図４、図５、
図６におけるＣの部分）が特定の位置に、しかも一定に
位置するか否か（以下、これを密着度が高いか低いかで
表すこともある）も影響すること、更にこの密着度が高
いか低いかは上記の溝の寸法、形状に影響されることを
知見し、本発明を完成した。Means for Solving the Problems The present inventor firstly found that in order to inflate a balloon evenly in a donut shape in the lateral direction when deaerated water is supplied to the balloon, a rubber film forming the balloon is used. It is needless to say that the thickness is uniform, but in addition, it is necessary that the opening surface of the opening 24 and the opening surface of the opening 25 in FIG. 3 are parallel to each other. In order to make a balloon whose opening surface of the part 25 is parallel, it was proposed to provide a groove between the molding part of the balloon part and the molding part of the winding part of the mold. Then, as a result of various studies on the balloon formed by the mold provided with the groove, in order to uniformly inflate the balloon, the portion where the balloon portion and the balloon winding portion are in close contact (FIG. 3, FIG. 4, FIG. 5,
(C portion in FIG. 6) also affects whether or not it is located at a specific position and at a constant position (hereinafter, this may be represented by high adhesion or low adhesion), and this adhesion is high. The present invention has been completed based on the finding that it is affected by the size and shape of the above groove.
【０００７】すなわち本発明は、ほぼ楕円体のバルーン
部成形部とその長軸方向の両端あるいは一端に連なる円
柱状の巻き上げ部成形部とを有し、バルーン部成形部と
巻き上げ部成形部との間に、巻き上げ部成形部の径より
少なくとも０．１ｍｍ小さく、且つ該巻き上げ部成形部
で成形したバルーンの巻き上げ部の内径より大きい径の
溝を設けたことを特徴とするバルーン用成形金型であ
る。上記の巻き上げ部の内径（Ｙ）が、Ｙ＝０．９３Ｘ
−０．８９（但し、式中Ｘは、金型の巻き上げ部成形部
の径である。）から算出することができる。また、上記
の溝の長さが、製品バルーンの巻き上げ部の太さの０．
２〜１倍であることが好ましい。更に、巻き上げ部成形
部と溝との間に、傾斜角が５〜４５°の傾斜部を設ける
ことが好ましい。That is, the present invention has a substantially elliptical balloon portion forming portion and a cylindrical winding portion forming portion which is connected to both ends or one end in the longitudinal direction of the balloon portion. A balloon molding die, characterized in that a groove having a diameter smaller than the diameter of the roll-up portion molding portion by at least 0.1 mm and larger than the inner diameter of the roll-up portion of the balloon molded by the roll-up portion molding portion is provided. is there. The inner diameter (Y) of the above winding portion is Y = 0.93X
It can be calculated from −0.89 (where X is the diameter of the winding part forming part of the die). In addition, the length of the above groove is less than the thickness of the rolled-up portion of the product balloon.
It is preferably 2-1 times. Further, it is preferable to provide an inclined portion having an inclination angle of 5 to 45 ° between the winding portion forming portion and the groove.
【０００８】[0008]
【発明の実施の形態】本発明のバルーン用成形金型にお
いて、バルーン部成形部と巻き上げ部成形部との間に設
ける溝は、（ｉ）巻き上げ部成形部の径より少なくとも
０．１ｍｍ小さい径であること、（ii）巻き上げ部成形
部で成形したバルーンの巻き上げ部の内径より大きい径
であることが必須要件である。この二つの要件を満たす
ことによって、バルーン巻き上げ部とバルーン部との密
着度が高いバルーンが得られ、均一な膨らみ方をするバ
ルーンが得られる。上記（ｉ）の要件を満たさない場
合、すなわち、溝の径と巻き上げ部成形部の径との差が
０．１ｍｍ未満の場合には、成形時にゴムラテックスが
溝に溜ってしまうため、溝としての役目を作用しなくな
るという不都合が生じる。また、（ii）の要件を満たさ
ない場合はバルーンの巻き上げ部が溝の金型から浮いて
しまい、バルーン巻き上げ部とバルーン部との密着度を
高めることができない。なお、本発明において、バルー
ンの巻き上げ部の内径及び外径並びに太さは、図４（図
３のバルーンの縦断面図）に示した個所を称す。BEST MODE FOR CARRYING OUT THE INVENTION In the balloon molding die of the present invention, the groove provided between the balloon portion molding portion and the winding portion molding portion has a diameter (i) at least 0.1 mm smaller than the diameter of the winding portion molding portion. (Ii) It is an essential requirement that the diameter is larger than the inner diameter of the rolled-up portion of the balloon molded by the rolled-up portion molding portion. By satisfying these two requirements, a balloon having high adhesion between the balloon winding portion and the balloon portion can be obtained, and a balloon having a uniform inflation can be obtained. When the requirement of (i) above is not satisfied, that is, when the difference between the groove diameter and the winding portion molding portion diameter is less than 0.1 mm, rubber latex accumulates in the groove during molding, so There is an inconvenience that the role of is not working. Further, when the requirement (ii) is not satisfied, the balloon winding portion floats from the mold of the groove, and the degree of adhesion between the balloon winding portion and the balloon portion cannot be increased. In the present invention, the inner diameter, the outer diameter, and the thickness of the rolled-up portion of the balloon refer to the locations shown in FIG. 4 (the vertical cross-sectional view of the balloon in FIG. 3).
【０００９】ところで、金型の巻き上げ部成形部にゴム
薄膜を形成させ、次いでゴム薄膜を巻き上げて巻き上げ
部を作り、その後金型より剥離すると、この巻き上げ部
は収縮しその内径は金型の巻き上げ部成形部の径よりも
小さくなる現象を示す。そこで、この収縮の度合いをみ
るため、金型の巻き上げ部成形部の径を種々変えて成形
し、その巻き上げ部の内径を測定した。図７はその測定
結果を示したもので、横軸は金型の巻き上げ部成形部の
径（Ｘ）であり、縦軸はこの巻き上げ部の内径（Ｙ）で
ある。この結果、Ｙ＝０．９３Ｘ−０．８９の関係にあ
ることがわかった。本発明では、溝の径を、巻き上げ部
成形部で成形して巻き上げたバルーン巻き上げ部の内径
より大きくするが、この式を用いると、金型の巻き上げ
部成形部の径に応じた巻き上げ部の内径が計算でき、し
たがって必要とする溝の径を知ることができる。By the way, when a rubber thin film is formed on the winding part forming part of the mold and then the rubber thin film is wound up to form a winding part and then peeled off from the mold, the winding part contracts and its inner diameter winds up the mold. The phenomenon that the diameter becomes smaller than the diameter of the molded part is shown. Then, in order to examine the degree of this shrinkage, the diameter of the winding portion forming portion of the mold was changed and the molding was performed, and the inner diameter of the winding portion was measured. FIG. 7 shows the measurement results, in which the horizontal axis represents the diameter (X) of the molding portion of the winding portion of the mold, and the vertical axis represents the inner diameter (Y) of the winding portion. As a result, it was found that there was a relationship of Y = 0.93X-0.89. In the present invention, the diameter of the groove is made larger than the inner diameter of the balloon winding portion formed and wound by the winding portion forming portion, but when this formula is used, the winding portion of the winding portion according to the diameter of the winding portion forming portion of the mold is The inner diameter can be calculated and thus the required groove diameter can be known.
【００１０】例えば、本発明のバルーン用成形用金型に
おいて、その金型の巻き上げ部成形部の径を８．５ｍｍ
に設定すると、溝の径は、上記の（ｉ）の要件を満たす
には、８．５−０．１＝８．４ｍｍ以下であることが必
要であり、また（ii）の要件を満たすには、巻き上げ部
の内径は、上記の式から、〔（０．９３×８．５ｍｍ）
−０．８９〕＝７．０ｍｍとなるから、溝の径は７．０
ｍｍ以上にする必要がある。したがって、溝の径は、
８．４ｍｍ〜７．０ｍｍの間に設定する。溝の径をこの
値に設定することによって本発明の所期の目的を達成し
えるバルーン成形用金型を得ることができる。For example, in the balloon molding die of the present invention, the diameter of the winding portion forming portion of the die is 8.5 mm.
When set to, the diameter of the groove must be 8.5-0.1 = 8.4 mm or less in order to satisfy the requirement of (i) above, and to satisfy the requirement of (ii). Is the inner diameter of the winding part from the above formula [(0.93 × 8.5 mm)
-0.89] = 7.0 mm, so the groove diameter is 7.0.
It is necessary to make it mm or more. Therefore, the diameter of the groove is
Set between 8.4 mm and 7.0 mm. By setting the groove diameter to this value, it is possible to obtain a balloon molding die that can achieve the intended purpose of the present invention.
【００１１】また、本発明のバルーン成形用金型に設け
る溝の長さは、バルーンの巻き上げ部の太さの０．２〜
１倍が好ましく、特に好ましくは０．５〜１倍の長さで
ある。溝の長さが、バルーンの巻き上げ部の太さの０．
２倍以下であると、原料のゴムラテックスが溝に溜っ
て、溝の役目がなくなる。また、バルーンの巻き上げ部
の太さより長いと、巻き上げ部とバルーン部との密着度
を高めるのが難しくなる。Further, the length of the groove provided in the balloon molding die of the present invention is 0.2 to the thickness of the rolled-up portion of the balloon.
The length is preferably 1 time, and particularly preferably 0.5 to 1 time. The length of the groove is less than the thickness of the rolled-up portion of the balloon.
If it is less than twice, the rubber latex as a raw material will be accumulated in the groove, and the role of the groove will be lost. Also, if the thickness of the rolled-up portion of the balloon is longer, it becomes difficult to increase the degree of adhesion between the rolled-up portion and the balloon portion.
【００１２】また、本発明のバルーン成形用金型におい
て、巻き上げ部成形部と溝との間に傾斜角が５〜４５°
の傾斜部を設けるのが好ましい。この傾斜角は特に好ま
しくは１０〜３０°である。巻き上げ部成形部と溝との
間に傾斜部がない場合には、金型表面にゴム薄膜を形成
させ、巻き上げ成形部のゴム薄膜を巻き上げるとき、巻
き上げ成形部と溝との境に生じるエッジ部でゴム薄膜が
切断されやすい。傾斜部を設けると円滑に巻き上げるこ
とができる。そして、傾斜角が５°未満では巻き上げ部
とバルーン部との密着度を高めるのが難しくなる。また
傾斜角が４５°を越えると成形時のゴムラテックスに浸
漬するときにこの部分に泡を抱えやすくなり、好ましく
ない。Further, in the balloon molding die of the present invention, the inclination angle is 5 to 45 ° between the winding portion molding portion and the groove.
It is preferable to provide the inclined portion. This inclination angle is particularly preferably 10 to 30 °. Roll-up part If there is no slope between the molding part and the groove, a rubber thin film is formed on the mold surface, and when winding up the rubber thin film of the roll-up molding part, the edge part that occurs at the boundary between the roll-up molding part and the groove It is easy to cut the rubber thin film. If the inclined portion is provided, it can be smoothly rolled up. When the inclination angle is less than 5 °, it becomes difficult to increase the degree of adhesion between the winding portion and the balloon portion. On the other hand, if the inclination angle exceeds 45 °, bubbles tend to be held in this portion when immersed in rubber latex during molding, which is not preferable.
【００１３】図１は、本発明の超音波内視鏡用バルーン
成形用の金型の一例の正面図である。この金型は、図３
の如く開口部が２個あるバルーンの成形に用いる金型の
例である。１はバルーン部成形部、２、３は巻き上げ部
成形部である。４はバルーン部成形部１と巻き上げ部成
形部２との間に設けられた溝である。５はバルーン部成
形部１と巻き上げ部成形部３との間に設けられた溝であ
る。６は巻き上げ部２と溝４との間の傾斜部である。７
は巻き上げ部３と溝５との間の傾斜部である。α及びβ
はそれぞれ傾斜部６及び７の傾斜角である。８は成形型
を支持する円柱状の支持棒である。９は支持棒８の先端
に設けられたネジ部で、支持板に螺合して固定するため
に設けられている。FIG. 1 is a front view of an example of a mold for forming a balloon for an ultrasonic endoscope of the present invention. This mold is shown in Figure 3.
As described above, this is an example of a mold used for molding a balloon having two openings. Reference numeral 1 is a balloon portion forming portion, and 2 and 3 are winding-up portion forming portions. Reference numeral 4 is a groove provided between the balloon part molding part 1 and the winding part molding part 2. Reference numeral 5 is a groove provided between the balloon portion molding portion 1 and the winding portion molding portion 3. Reference numeral 6 is an inclined portion between the winding portion 2 and the groove 4. 7
Is an inclined portion between the winding portion 3 and the groove 5. α and β
Are the inclination angles of the inclined portions 6 and 7, respectively. Reference numeral 8 is a cylindrical support rod that supports the forming die. Reference numeral 9 denotes a screw portion provided at the tip of the support rod 8 for screwing and fixing the support plate.
【００１４】バルーン部成形部１はほぼ楕円体をしてい
るが、使用する超音波探触子の形状に応じて変形させ得
る。またバルーン部成形部１の長軸方向両端１０、１１
の径は溝４、５の径に等しいが、これらの径も、使用す
る内視鏡の先端の径の大きさ、及び超音波探触子の径の
大きさに合わせて適宜に変更する。巻き上げ部成形部２
と傾斜部６との境界のエッジＡおよび巻き上げ部成形部
３と傾斜部７との境界のエッジＢは、面取りしても、Ｒ
を付けてもかまわない。また、用途によっては、一端に
溝を設けてバルーンの巻き上げ部を形成させ、他端には
巻き上げ部成形部のみで溝を設けず、バルーンの巻き上
げ部を形成させないこともある。The balloon portion molding portion 1 has a substantially ellipsoidal shape, but can be deformed depending on the shape of the ultrasonic probe used. In addition, both ends 10 and 11 in the long axis direction of the balloon molding unit 1
Is the same as the diameters of the grooves 4 and 5, but these diameters are also appropriately changed according to the diameter of the tip of the endoscope used and the diameter of the ultrasonic probe. Winding part forming part 2
Even if chamfering, the edge A at the boundary between the curved portion 6 and the inclined portion 6 and the edge B at the boundary between the winding portion forming portion 3 and the inclined portion 7 are R
You can put it on. Further, depending on the application, there is a case in which a groove is formed at one end to form a rolled-up portion of the balloon, and the other end is not provided with the groove only by the rolled-up portion forming portion and the rolled-up portion of the balloon is not formed.
【００１５】図２は、本発明の超音波内視鏡用バルーン
成形用の金型の他の例の正面図である。この金型は、図
５の如く開口部が１個の袋状のバルーンの成形に用いる
金型の例である。１はバルーン部成形部、２は巻き上げ
部成形部である。４はバルーン部成形部１と巻き上げ部
成形部２との間に設けられた溝である。６は巻き上げ部
２と溝４との間の傾斜部である。αは傾斜部６の傾斜角
である。また、８は成形型を支持する円柱状の支持棒で
ある。９は支持棒８の先端に設けられたネジ部で、支持
板に螺合して固定するために設けられている。バルーン
部成形部１はほぼ楕円体をしているが、使用する超音波
探触子の形状に応じて変形させ得る。またバルーン部成
形部１の長軸方向両端１０の径は溝４の径に等しいが、
これらの径も、使用する内視鏡の先端の径の大きさ、及
び超音波探触子の径の大きさに合わせて適宜に変更す
る。巻き上げ部成形部２と傾斜部６との境界のエッジＡ
は面取りしても、Ｒを付けてもかまわない。FIG. 2 is a front view of another example of a mold for forming a balloon for an ultrasonic endoscope of the present invention. This mold is an example of a mold used for molding a bag-shaped balloon having one opening as shown in FIG. Reference numeral 1 is a balloon portion forming portion, and 2 is a winding portion forming portion. Reference numeral 4 is a groove provided between the balloon part molding part 1 and the winding part molding part 2. Reference numeral 6 is an inclined portion between the winding portion 2 and the groove 4. α is the inclination angle of the inclined portion 6. Further, 8 is a columnar support rod that supports the molding die. Reference numeral 9 denotes a screw portion provided at the tip of the support rod 8 for screwing and fixing the support plate. The balloon part molding part 1 has a substantially ellipsoidal shape, but can be deformed depending on the shape of the ultrasonic probe used. The diameter of both ends 10 in the major axis direction of the balloon molding portion 1 is equal to the diameter of the groove 4,
These diameters are also appropriately changed according to the diameter of the tip of the endoscope used and the diameter of the ultrasonic probe. Edge A at the boundary between the winding portion forming portion 2 and the inclined portion 6
C may be chamfered or R may be attached.
【００１６】本発明の超音波内視鏡用バルーン成形用の
金型は、ステンレスなどの金属、ポリフェニレンサルフ
ァイトなどの合成樹脂などを素材にして作る。金属製或
いは合成樹脂製の棒に旋盤掛けを行なって容易に製造で
きる。本発明の超音波内視鏡用バルーン成形用の金型を
用いて、バルーンを製造するには常法で行う。すなわ
ち、図１または図２に示す金型を螺着した支持板を、金
型が下方を向くように位置させて、ゴムラテックスに金
型を浸漬する。この際、バルーンの巻き上げ部２２又は
２８が所定の太さになるように図１及び図２における巻
き上げ部２の上部１２の適切な位置まで浸漬する。金型
表面にゴムが付着し、皮膜を形成する。次いで金型をゴ
ムラテックスから引上げ、乾燥する。その後、図１の金
型の場合は、巻き上げ部成形部２、３に形成されたゴム
膜を溝４、５に向かって巻き上げ、更にバルーン部成形
部の両端１０、１１まで巻き上げ、次いでゴム膜を金型
から離型し、水洗し、常法で加硫して仕上げる。図２の
金型の場合は、巻き上げ部成形部２に形成されたゴム膜
を溝４に向かって巻き上げ、更にバルーン部成形部の両
端１０まで巻き上げ、次いでゴム膜を金型から離型し、
水洗し、常法で加硫して仕上げる。The metal mold for forming a balloon for an ultrasonic endoscope of the present invention is made of a metal such as stainless steel or a synthetic resin such as polyphenylene sulfite as a material. It can be easily manufactured by lathing a rod made of metal or synthetic resin. A balloon is manufactured by a conventional method using the mold for forming a balloon for an ultrasonic endoscope of the present invention. That is, the support plate screwed with the mold shown in FIG. 1 or 2 is positioned so that the mold faces downward, and the mold is immersed in the rubber latex. At this time, the balloon is soaked up to an appropriate position on the upper portion 12 of the winding portion 2 in FIGS. 1 and 2 so that the winding portion 22 or 28 has a predetermined thickness. Rubber adheres to the mold surface and forms a film. The mold is then pulled out of the rubber latex and dried. After that, in the case of the mold shown in FIG. 1, the rubber film formed on the roll-up portion molding portions 2 and 3 is rolled up toward the grooves 4 and 5, and further rolled up to both ends 10 and 11 of the balloon portion molding portion, and then the rubber film. Is released from the mold, washed with water, and vulcanized by a conventional method to finish. In the case of the mold shown in FIG. 2, the rubber film formed on the winding part molding part 2 is wound up toward the groove 4, and further wound up to both ends 10 of the balloon part molding part, and then the rubber film is released from the mold,
Wash with water and vulcanize in the usual way to finish.
【００１７】図３は、図１の金型で成形して得られた超
音波内視鏡用バルーンの斜視図である。２０は超音波内
視鏡用バルーンである。２１はバルーン部、２２は巻き
上げ部成形部２に形成させたゴム膜を巻き上げて作った
巻き上げ部である。２３は巻き上げ部成形部３に形成さ
せたゴム膜を巻き上げて作った巻き上げ部である。また
２４、２５はバルーン２０の両端の開口部である。そし
て、このバルーン２０は、内視鏡の先端に取り付けた超
音波探触子に、バルーン装着アタッチメントを用いて装
着する。バルーン２０の巻き上げ部２２を内視鏡の先端
に設けられた溝に嵌め込み固定する。一方バルーン２０
の巻き上げ部２３を超音波探触子の先端に、バルーン２
０内が密封状態になるように固定する。図４はこのバル
ーンの縦断面図である。FIG. 3 is a perspective view of an ultrasonic endoscope balloon obtained by molding with the mold of FIG. Reference numeral 20 is a balloon for an ultrasonic endoscope. Reference numeral 21 is a balloon portion, and 22 is a winding portion formed by winding a rubber film formed on the winding portion forming portion 2. Reference numeral 23 is a winding portion formed by winding the rubber film formed on the winding portion forming portion 3. Further, 24 and 25 are openings at both ends of the balloon 20. Then, the balloon 20 is attached to the ultrasonic probe attached to the tip of the endoscope using a balloon attachment. The winding portion 22 of the balloon 20 is fitted and fixed in a groove provided at the tip of the endoscope. Meanwhile balloon 20
At the tip of the ultrasonic probe, the winding part 23 of the balloon 2
Fix it so that the inside of 0 is sealed. FIG. 4 is a vertical sectional view of this balloon.
【００１８】図５は、図２の金型で成形して得られた超
音波内視鏡用バルーンの斜視図である。２６は超音波内
視鏡用バルーンである。２７はバルーン部、２８は巻き
上げ部成形部２に形成させたゴム膜を巻き上げて作った
巻き上げ部である。また２９はバルーン２６の開口部で
ある。そして、このバルーン２６は、内視鏡の先端に取
り付けた超音波探触子に、バルーン装着アタッチメント
を用いて装着する。バルーン２６の巻き上げ部２８を内
視鏡の先端に設けられた溝に嵌め込み固定し、バルーン
２６内が密封状態になるように固定する。FIG. 5 is a perspective view of the ultrasonic endoscope balloon obtained by molding with the mold of FIG. Reference numeral 26 is a balloon for an ultrasonic endoscope. Reference numeral 27 is a balloon portion, and 28 is a winding portion formed by winding a rubber film formed on the winding portion forming portion 2. Reference numeral 29 is an opening of the balloon 26. Then, the balloon 26 is attached to the ultrasonic probe attached to the tip of the endoscope using a balloon attachment. The winding portion 28 of the balloon 26 is fitted and fixed in a groove provided at the tip of the endoscope, and fixed so that the inside of the balloon 26 is in a sealed state.
【００１９】本発明の金型においては、金型の巻き上げ
部成形部２、３より小さい径の溝４、５を形成したの
で、金型の巻き上げ部成形部２、３に形成されたゴム皮
膜の巻き上げが均等に行なえ、そのため巻き上げを完了
した時に形成される開口部２４の開口面と開口部２５の
開口面とが平行になる。したがって、本発明の金型を用
いて成型すると、ドーナツ状にほぼ均一に膨らますこと
ができるバルーンを製造することができる。In the mold of the present invention, since the grooves 4 and 5 having a diameter smaller than that of the roll-up part molding parts 2 and 3 of the mold are formed, the rubber film formed on the roll-up part molding parts 2 and 3 of the mold is formed. Can be wound evenly, so that the opening surface of the opening 24 and the opening surface of the opening 25 formed when the winding is completed are parallel to each other. Therefore, by molding using the mold of the present invention, it is possible to manufacture a balloon that can be inflated almost uniformly in a donut shape.
【００２０】更に、本発明の金型においては、上記の溝
の寸法、形状を限定することにより、バルーン部とバル
ーン巻き上げ部との密着する部分（図３、図４、図５、
図６におけるＣの部分）を特定の位置に、しかも一定に
位置させることができる。すなわち、前記の如くして巻
き上げ部成形部に形成させたゴムの薄膜を巻き上げる
と、ゴム薄膜同士がすぐに密着して巻き上げ部を構成す
る。そして、この巻き上げ部分からバルーン部を構成す
るゴム薄膜が延び出る状態になる。図６はこの状態を示
した部分拡大断面図である。図６で２２はゴム薄膜を巻
き上げた巻き上げ部、２１はバルーン部であって、ゴム
薄膜で構成されている。成形用金型の溝の寸法、形状が
本発明の規定外の場合には、成形して得られたバルーン
は、図６のａ図、ｂ図に示すようにバルーン部とバルー
ン巻き上げ部との密着する位置が、ｏの位置になる部分
があったり、ｐの位置になる部分があったりして一定し
ない（すなわち、密着度が低い）。このように密着する
位置が一定しないため、バルーンは均一に膨らまなくな
る。一方、成形用金型の溝の寸法、形状を本発明の規定
内にすると、図６のｂ図に示すように、バルーン部と巻
き上げ部との密着する部分が全てｐの位置（巻き上げ部
の水平方向内側端部）に位置するようになる（すなわ
ち、密着度が高くなる）。そのため、バルーンは均一に
膨らむようになる。上記の説明では、本発明の金型を超
音波内視鏡用バルーンの成形に用いることを主にして説
明したが、本発明の金型は超音波内視鏡用以外のバルー
ンの成形にも使用できる。Further, in the mold of the present invention, by limiting the size and shape of the groove, the portion where the balloon portion and the balloon winding portion are in close contact (FIGS. 3, 4, 5).
It is possible to position (part C in FIG. 6) at a specific position and at a constant position. That is, when the rubber thin film formed in the winding portion molding portion as described above is wound up, the rubber thin films immediately come into close contact with each other to form the winding portion. Then, the rubber thin film forming the balloon portion extends from the rolled-up portion. FIG. 6 is a partially enlarged sectional view showing this state. In FIG. 6, reference numeral 22 is a winding portion formed by winding a rubber thin film, and 21 is a balloon portion, which is made of a rubber thin film. When the size and shape of the groove of the molding die are out of the scope of the present invention, the balloon obtained by molding has a balloon portion and a balloon winding portion as shown in FIGS. The position of close contact is not constant because there is a part at the position of o or a part at the position of p (that is, the close contact degree is low). Since the contact positions are not constant, the balloon does not inflate uniformly. On the other hand, when the size and shape of the groove of the molding die are within the scope of the present invention, as shown in FIG. 6B, all the portions where the balloon portion and the winding portion are in close contact are at the p position (the winding portion (Inner end in the horizontal direction) (that is, the degree of adhesion is increased). Therefore, the balloon is inflated uniformly. In the above description, the mold of the present invention has been mainly described for use in forming a balloon for an ultrasonic endoscope, but the mold of the present invention is also used for forming a balloon other than for an ultrasonic endoscope. Can be used.
【００２１】[0021]
【実施例】以下、実施例をもって、更に具体的に本発明
を説明する。
実施例１．図１に示す金型を用いて超音波内視鏡用バル
ーンを成形した。この金型において、バルーン部成形部
１は、長さ１６ｍｍ、径１６ｍｍのほぼ楕円体である。
巻き上げ部成形部２は、長さ２０ｍｍ、径１０．５ｍｍ
の円柱形にした。巻き上げ部成形部３は、長さ１１ｍ
ｍ、径７．５ｍｍの円柱形にした。溝４は長さ１ｍｍ、
径１０ｍｍにし、溝５は長さ１ｍｍ、径７ｍｍにした。
傾斜角α、βは共に１５°とした。EXAMPLES The present invention will be described in more detail with reference to the following examples. Example 1. A balloon for an ultrasonic endoscope was molded using the mold shown in FIG. In this mold, the balloon part molding part 1 is a substantially ellipsoidal body having a length of 16 mm and a diameter of 16 mm.
The winding part forming part 2 has a length of 20 mm and a diameter of 10.5 mm.
Made into a cylindrical shape. The winding part forming part 3 has a length of 11 m.
m, and the diameter was 7.5 mm. The groove 4 has a length of 1 mm,
The diameter was 10 mm, and the groove 5 had a length of 1 mm and a diameter of 7 mm.
The inclination angles α and β were both 15 °.
【００２２】下記に示す配合割合のゴムラテックスを調
製した。ゴムラテックスに配合剤を添加、撹拌して均一
な配合ラテックスとした。
成 分 使用材料 重量部
ゴムラテックス シス−1,4−ポリイソプレン １００(ゴム分)
加硫剤 硫 黄 １．２
加硫助剤 酸化亜鉛 ０．７
加硫促進剤 ジ−ｎ−ブチルジチオカルバミン酸ナトリウム ０．５
老化防止剤 ２，２’−メチレン−ビス〔６−α−メ
チル−ベンジル）−ｐ−クレゾ−ル〕 ０．５A rubber latex having a compounding ratio shown below was prepared. A compounding agent was added to the rubber latex and the mixture was stirred to make a uniform compounded latex. Composition Materials used Weight part Rubber latex cis-1,4-polyisoprene 100 (rubber content) Vulcanizing agent Sulfur yellow 1.2 Vulcanization aid Zinc oxide 0.7 Vulcanization accelerator Sodium di-n-butyldithiocarbamate 0.5 Anti-aging agent 2,2′-methylene-bis [6-α-methyl-benzyl) -p-cresol] 0.5
【００２３】前記金型を上記組成のゴムラテックスに巻
き上げ部成形部２中途部分まで浸漬し、金型表面にゴム
ラテックスを付着させ、ゴム皮膜を形成させた。次いで
引上げ、乾燥し、金型の巻き上げ部成形部に形成された
皮膜を巻き上げた。その後、ゴム成形品を金型から離型
した。水洗し、９０℃で１時間加硫処理した。一端の巻
き上げ部の内径が８．８ｍｍ、他端の巻き上げ部の内径
が６．１ｍｍ、巻き上げ部の太さが共に１．４ｍｍの超
音波内視鏡用バルーンが得られた。このバルーンの片膨
らみ値は１．１であった。The mold was immersed in a rubber latex of the above composition up to a midway part of the roll-up molding part 2, and the rubber latex was attached to the surface of the mold to form a rubber film. Next, the film was pulled up and dried, and the film formed on the winding part forming part of the mold was wound up. Then, the rubber molded product was released from the mold. It was washed with water and vulcanized at 90 ° C. for 1 hour. A balloon for an ultrasonic endoscope having an inner diameter of the winding portion at one end of 8.8 mm, an inner diameter of the winding portion at the other end of 6.1 mm, and a thickness of the winding portion of both 1.4 mm was obtained. The partial bulge value of this balloon was 1.1.
【００２４】実施例２．図２に示す金型を用いて超音波
内視鏡用バルーンを成形した。この金型において、バル
ーン部成形部１は、長さ１４ｍｍ、径１１ｍｍのほぼ楕
円体である。巻き上げ部成形部２は、長さ２０ｍｍ、径
７．５ｍｍの円柱形にした。溝４は長さ０．５ｍｍ、径
７ｍｍにした。傾斜角αは２０°とした。天然ゴムラテ
ックスを用いて実施例１と同様にしてバルーンを成形し
た。巻き上げ部の内径が６．２ｍｍ、巻き上げ部の太さ
が１．２ｍｍの超音波内視鏡用バルーンが得られた。こ
のバルーンの片膨らみ値は１．１であった。Example 2. A balloon for an ultrasonic endoscope was molded using the mold shown in FIG. In this mold, the balloon part molding part 1 is a substantially ellipsoidal body having a length of 14 mm and a diameter of 11 mm. The rolled-up part molding part 2 was formed into a cylindrical shape having a length of 20 mm and a diameter of 7.5 mm. The groove 4 had a length of 0.5 mm and a diameter of 7 mm. The inclination angle α was 20 °. A balloon was molded using natural rubber latex in the same manner as in Example 1. A balloon for an ultrasonic endoscope having an inner diameter of the winding portion of 6.2 mm and a thickness of the winding portion of 1.2 mm was obtained. The partial bulge value of this balloon was 1.1.
【００２５】[0025]
【発明の効果】以上述べたように、本発明によると、均
一に膨らますことができるバルーンを製造することがで
きる。As described above, according to the present invention, a balloon that can be inflated uniformly can be manufactured.
【図１】本発明の超音波内視鏡バル−ン成形用金型の一
例の正面図FIG. 1 is a front view of an example of a mold for molding an ultrasonic endoscope balloon according to the present invention.
【図２】本発明の超音波内視鏡バル−ン成形用金型の他
の正面図FIG. 2 is another front view of the ultrasonic endoscope balloon molding die of the present invention.
【図３】図１の金型を用いて成形したバルーンの斜視図3 is a perspective view of a balloon molded using the mold of FIG.
【図４】図３のバル−ンの断面図FIG. 4 is a sectional view of the balloon shown in FIG.
【図５】図２の金型を用いて成形したバル−ンの斜視図5 is a perspective view of a balloon molded by using the mold of FIG.
【図６】バル−ンの巻き上げ部の部分拡大断面図FIG. 6 is a partially enlarged cross-sectional view of the winding portion of the balloon.
【図７】金型の巻き上げ部成形部の径（Ｘ）と巻き上げ
部の内径（Ｙ）との関係を示すグラフ。FIG. 7 is a graph showing the relationship between the diameter (X) of the molding portion of the winding portion of the mold and the inner diameter (Y) of the winding portion.
１ バルーン部成形部 ２，３ 巻き上げ部成形部 ４，５ 溝 ６，７ 傾斜部 ８ 支持棒 ９ ネジ部 ２０，２６ 超音波内視鏡用バルーン ２１，２７ バルーン部 ２２，２３，２８ 巻き上げ部 ２４，２５，２９ バルーン開口部 1 Balloon part forming part 2, 3 Roll-up part Molding part 4,5 grooves 6,7 Inclined part 8 support rods 9 screw part 20,26 Balloons for ultrasonic endoscopy 21,27 Balloon part 22, 23, 28 Winding part 24,25,29 balloon opening
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ａ６１Ｍ 25/00 Ａ６１Ｍ 25/00 ４１０Ｂ (58)調査した分野(Int.Cl.7，ＤＢ名) B29C 41/40 A61B 1/00 300 A61B 8/12 B29C 33/42 B29C 41/14 A61M 25/00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 7 Identification code FI // A61M 25/00 A61M 25/00 410B (58) Fields surveyed (Int.Cl. 7 , DB name) B29C 41/40 A61B 1/00 300 A61B 8/12 B29C 33/42 B29C 41/14 A61M 25/00
Claims (4)
方向の両端あるいは一端に連なる円柱状の巻き上げ部成
形部とを有し、バルーン部成形部と巻き上げ部成形部と
の間に、巻き上げ部成形部の径より少なくとも０．１ｍ
ｍ小さく、且つ該巻き上げ部成形部で成形したバルーン
の巻き上げ部の内径より大きい径の溝を設けたことを特
徴とするバルーン用成形金型。1. A substantially elliptical balloon part forming part and a columnar winding part forming part continuous to both ends or one end in the longitudinal direction of the balloon part forming part, and between the balloon part forming part and the winding part forming part, At least 0.1m from the diameter of the winding part forming part
A balloon molding die characterized in that a groove having a diameter smaller than m and larger than the inner diameter of the winding portion of the balloon formed by the winding portion forming portion is provided.
Ｘ−０．８９（但し、式中Ｘは、金型の巻き上げ部成形
部の径である。）から算出される値である請求項１記載
のバルーン用成形金型。2. The inner diameter (Y) of the winding portion is Y = 0.93.
The molding die for a balloon according to claim 1, which is a value calculated from X-0.89 (where X is the diameter of the roll-up portion molding portion of the die).
の０．２〜１倍であることを特徴とする請求項１又は２
記載のバルーン用成形金型。3. The length of the groove is 0.2 to 1 times the thickness of the rolled-up portion of the balloon.
A molding die for a balloon as described.
５〜４５°の傾斜部を設けたことを特徴とする請求項１
〜３のいずれかに記載のバルーン用成形金型。Between 4. A hoisting portion forming portion and the groove, claim 1, the inclination angle is characterized by providing an inclined portion of 5 to 45 °
The molding die for a balloon according to any one of 3 to 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20123697A JP3413586B2 (en) | 1997-07-28 | 1997-07-28 | Balloon mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20123697A JP3413586B2 (en) | 1997-07-28 | 1997-07-28 | Balloon mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH1142658A JPH1142658A (en) | 1999-02-16 |
| JP3413586B2 true JP3413586B2 (en) | 2003-06-03 |
Family
ID=16437604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20123697A Expired - Fee Related JP3413586B2 (en) | 1997-07-28 | 1997-07-28 | Balloon mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3413586B2 (en) |
-
1997
- 1997-07-28 JP JP20123697A patent/JP3413586B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH1142658A (en) | 1999-02-16 |
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