JPH09133785A - Finger block for key insertion - Google Patents

Finger block for key insertion

Info

Publication number
JPH09133785A
JPH09133785A JP7316061A JP31606195A JPH09133785A JP H09133785 A JPH09133785 A JP H09133785A JP 7316061 A JP7316061 A JP 7316061A JP 31606195 A JP31606195 A JP 31606195A JP H09133785 A JPH09133785 A JP H09133785A
Authority
JP
Japan
Prior art keywords
key
finger
fingers
finger block
protrusions
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.)
Withdrawn
Application number
JP7316061A
Other languages
Japanese (ja)
Inventor
Shinsuke Yoshida
伸介 吉田
Kazuto Yoneda
一人 米田
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.)
Nuclear Fuel Industries Ltd
Original Assignee
Nuclear Fuel Industries 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 Nuclear Fuel Industries Ltd filed Critical Nuclear Fuel Industries Ltd
Priority to JP7316061A priority Critical patent/JPH09133785A/en
Publication of JPH09133785A publication Critical patent/JPH09133785A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin
    • Y02E30/30Nuclear fission reactors

Landscapes

  • Adornments (AREA)

Abstract

PROBLEM TO BE SOLVED: To accurately position a key end and horizontally fix a key at the time of inserting the key for pressing the elastic projection of a support grill. SOLUTION: This finger block has many fingers 1 and 2 inserted in each cell of a support grill S, and is formed to press the elastic projection of the support grill S with a part of the fingers 1 and 2 kept in contact therewith. In this case, a pair of upper and lower projections 5 and 6 are formed on the side of the pressing parts of the fingers 1 and 2 for keeping a key K inserted and held in between along a direction orthogonal with the pressing direction thereof. Also, a gap between the projections 5 and 6 of the finger 1 to bear the end of the key K is kept roughly equal to the breadth of the shaft of the key K.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、PWR燃料集合体
の組立時に支持格子に挿入される弾性突起押圧用キーに
係り、詳しくはこのキー挿入時に使用されるフィンガー
ブロックの改良に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key for pressing elastic protrusions which is inserted into a support grid when assembling a PWR fuel assembly, and more particularly to an improvement of a finger block used when the key is inserted.

【0002】[0002]

【従来の技術】原子燃料集合体には、多数の燃料棒同士
を所定の間隔を隔て、上部ノズルと、下部ノズル間で確
実に保持し、原子炉運転中何等支障なく充分に性能を発
揮できるように、支持格子が燃料棒長手方向に複数個設
けられている。
2. Description of the Related Art In a nuclear fuel assembly, a large number of fuel rods are securely held between an upper nozzle and a lower nozzle at predetermined intervals so that they can sufficiently perform their performance during operation of a nuclear reactor. Thus, a plurality of support grids are provided in the longitudinal direction of the fuel rod.

【0003】この支持格子は通常、格子によって仕切ら
れた多数のセル内に、夫々多数の燃料棒および一部所要
位置に制御棒案内シンブル管などを平行に整列させ、発
熱する燃料棒表面から除熱するため燃料棒間に必要なギ
ャップを保持して冷却材の流れを保障する働きをするも
のであり、一般に鉄−クロム−ニッケル系超合金のイン
コネルの薄板をプレス加工で所定形状に成型すると共
に、図8(A),(B)に示すように燃料棒(図示せ
ず)をセル8内で弾性的に保持する弾性突起3や固定突
起9を設け、スリットを付した格子板を縦横格子状に組
み立ててその交わる部分の上下を各種溶接やロー付等の
冶金的接合手段で結合一体化することによって製作され
ている。
This support grid is usually arranged in parallel with a large number of fuel rods and control rod guide thimble tubes in a large number of cells partitioned by the lattice so as to be removed from the surface of the fuel rods which generate heat. Since it heats, it maintains the necessary gap between the fuel rods to ensure the flow of the coolant. Generally, a thin plate of iron-chromium-nickel superalloy Inconel is pressed into a predetermined shape. In addition, as shown in FIGS. 8 (A) and 8 (B), elastic projections 3 and fixing projections 9 that elastically hold fuel rods (not shown) in the cells 8 are provided, and a lattice plate with slits is provided in the vertical and horizontal directions. It is manufactured by assembling it in a lattice shape and combining and joining the intersecting portions by various metallurgical joining means such as welding or brazing.

【0004】一方、上記多数の燃料棒は、上述の如く支
持格子の各セル内で前記弾性突起と固定突起とにより弾
性的に保持されているが、この燃料棒の挿入または抜き
取りに際しては、上記両突起によって燃料棒が傷つけら
れることがないように、弾性突起の方を引っ込ませてお
くことが望ましい。
On the other hand, the large number of fuel rods are elastically held by the elastic protrusions and the fixed protrusions in each cell of the support grid as described above. It is desirable to retract the elastic protrusion so that the fuel rod is not damaged by both protrusions.

【0005】そこで、従来は、特公昭54−44360
号公報に記載のように、この燃料棒の支持格子への挿入
あるいは抜き取りに際し、図9(A),(B)に示す如
く、セル8コーナー部のスリット孔S1 …S1 の間隔に
合わせ複数の突出部10…10を設けたキーKを、上記
スリット孔S1 …S1 に突出部を縦にして挿入した後
に、キーを90度回転させ、突出部10…10を図示の
如く溝縁部11…11に圧接することによってキーKの
背で前記弾性突起3…3の上部または下部を押圧し、燃
料棒が非接触状態で入る空間部をセル8内に形成せしめ
ていた。
Therefore, conventionally, the Japanese Patent Publication No. 54-44360
As described in Japanese Unexamined Patent Publication (Kokai), when inserting or extracting this fuel rod into or from the support grid, as shown in FIGS. 9 (A) and 9 (B), it is adjusted to the intervals of the slit holes S 1 ... S 1 at the corners of the cell 8. After inserting the key K provided with a plurality of protrusions 10 ... 10 into the slit holes S 1 ... S 1 with the protrusions vertically, the keys are rotated by 90 degrees so that the protrusions 10 ... The upper portion or the lower portion of the elastic protrusions 3 ... 3 is pressed by the spine of the key K by being pressed against the edge portions 11 ... 11 to form a space portion in the cell 8 into which the fuel rod enters without contact.

【0006】[0006]

【発明が解決しようとする課題】ところで、上記キーを
支持格子に挿入する際しては、図4に示す如きフィンガ
ーブロックFと呼ばれるバネ押し拡げ装置を用い、この
フィンガーブロックFの各フィンガー1、2に支持格子
の前記弾性突起3を係合せしめ、上記フィンガー1、2
により上記弾性突起を押し拡げた後、図9に示すように
支持格子Sの各スリット孔S1 に弾性突起押圧用キーK
を夫々挿入し、回転させていた。
By the way, when inserting the above-mentioned key into the support grid, a spring expansion device called a finger block F as shown in FIG. 4 is used, and each finger 1 of this finger block F is The elastic projections 3 of the support grid are engaged with the fingers 2, and the fingers 1, 2
By After pushed open the elastic projections, key elastic projections pressed into the slits S 1 of the support grid S as shown in FIG. 9 K
Were inserted and rotated.

【0007】このキー挿入作業は全て手作業により行わ
れており、多数のキーを前記弾性突起の上・下部という
定められた位置へ挿入すると共に、その長さを決定し、
かつその位置を保持しながら回転させるためには大変な
時間と労力を費やしているのが現状である。特に、支持
格子の対向側面から夫々挿入される短尺キーでは、キー
が支持格子の幅の半分程度の長さしかなく、キーの基端
部のみしか把持することができないため、キーの先端部
が上下にずれ易く、キーが斜めに固定されて取り外し時
に具合が悪くなるとの問題があった。
This key insertion work is all done manually, and a large number of keys are inserted into the predetermined positions of the upper and lower parts of the elastic projection and the length thereof is determined.
In addition, it takes a lot of time and effort to rotate while holding the position. In particular, with short keys that are inserted from opposite sides of the support grid, the key is only half the width of the support grid, and only the base end of the key can be gripped, so the tip of the key is There is a problem that the keys are easily displaced up and down, and the key is fixed obliquely and becomes uncomfortable when removed.

【0008】本発明は叙上の如き実状に対処し、前記フ
ィンガーブロックに新規な構成を見出すことにより、位
置ずれをなくして上記キーの挿入作業を正確に行わしめ
ることを目的とするものである。
It is an object of the present invention to deal with the above situation and to find a new structure for the finger block so as to eliminate the positional displacement and to accurately perform the key insertion operation. .

【0009】[0009]

【課題を解決するための手段】すなわち、上記目的に適
合する本発明のキー挿入用フィンガーブロックの特徴
は、支持格子の各セルに挿入される多数のフィンガーを
有し、このフィンガーの一部を支持格子の弾性突起に接
当して押圧するフィンガーブロックにおいて、上記フィ
ンガーの押圧側の側部に、この押圧方向と直交して挿入
されるキーをその間に嵌挿させる上下1対の突起部を形
成すると共に、上記キーの先端部(その近傍を含む)を
受けるフィンガーの上記突起部の間隔を、このキーの軸
部の幅程度に形成したところにある。
That is, the feature of the finger block for key insertion of the present invention which meets the above-mentioned object is that it has a large number of fingers to be inserted in each cell of the support grid, and a part of this finger is In a finger block that abuts against and presses elastic protrusions of a support grid, a pair of upper and lower protrusions for inserting a key inserted perpendicularly to the pressing direction is provided on the side of the finger on the pressing side. Along with the formation, the interval between the protrusions of the fingers that receive the tip portion (including the vicinity thereof) of the key is formed to be about the width of the shaft portion of the key.

【0010】[0010]

【作用】上記本発明のフィンガーブロックでは、キー先
端部を受けるフィンガーの突起間隔をこのキーの軸幅程
度となしたことから、キー先端部の位置決めが正確に行
われるようになり、キーの水平な挿入とその位置での回
転とを容易に行うことが可能となる。
In the finger block of the present invention described above, since the projection interval of the fingers that receive the key tip portion is set to be about the axial width of the key, the key tip portion can be accurately positioned, and the horizontal position of the key can be achieved. It is possible to easily perform proper insertion and rotation at that position.

【0011】[0011]

【実施例】以下、さらに添付図面を参照して、本発明の
実施例を説明する。
Embodiments of the present invention will be described below with reference to the accompanying drawings.

【0012】図1は本発明実施例のフィンガーブロック
の使用状態を示す断面図、図2は同フィンガーブロック
のキー先端部を受けるフィンガーを示す側面図、図3は
同実施例のその他のフィンガーを示す側面図、図4は同
実施例のフィンガーブロックの全体図、図5、図6は同
フィンガーブロックの使用方法を示す斜視図である。
FIG. 1 is a cross-sectional view showing a usage state of a finger block according to an embodiment of the present invention, FIG. 2 is a side view showing a finger for receiving a key tip portion of the finger block, and FIG. 3 is a view showing other fingers of the embodiment. FIG. 4 is a side view showing the same, FIG. 4 is an overall view of the finger block of the embodiment, and FIGS. 5 and 6 are perspective views showing a method of using the finger block.

【0013】上記実施例のフィンガーブロックFは、図
4、図5に示すように、支持格子Sの各セルに挿入され
る多数のフィンガー1、2を有し、このフィンガー1、
2の先端の側面を、図2、図3に示すように支持格子S
の弾性突起3の中央突起4に接当して押圧するようにな
っている。そして、本発明実施例では、上記各フィンガ
ー1、2の押圧側の側部に、この押圧方向と直交して挿
入されるキーKを間に嵌挿させる上下1対の突起部5、
6を形成し、特に上記キーKの先端部を受ける中央付近
の列のフィンガー1の突起部5、6の間隔を、図1、図
2に示す如く上記キーKの軸部の幅程度に形成してい
る。
As shown in FIGS. 4 and 5, the finger block F of the above embodiment has a large number of fingers 1 and 2 which are inserted into each cell of the supporting grid S.
As shown in FIG. 2 and FIG.
The elastic projection 3 is pressed against the central projection 4 of the elastic projection 3. Then, in the embodiment of the present invention, a pair of upper and lower projections 5 into which the keys K inserted perpendicularly to the pressing direction are inserted between the pressing side portions of the fingers 1 and 2,
6 is formed, and in particular, the interval between the protrusions 5 and 6 of the fingers 1 in the central row that receives the tip of the key K is formed to be about the width of the shaft of the key K as shown in FIGS. doing.

【0014】上記実施例では、キーKは、図6に示すよ
うに支持格子Sの対向側面から夫々挿入される2分割型
の短尺キーであり、この短尺キーKの先端部を受けるフ
ィンガーとしては、図4に示すフィンガーの群の内、中
央付近の列のフィンガー1となる。
In the above-mentioned embodiment, the key K is a two-division type short key inserted respectively from the opposite side surfaces of the support grid S as shown in FIG. 6, and as a finger for receiving the tip of this short key K. Of the group of fingers shown in FIG. 4, this is finger 1 in the row near the center.

【0015】これを詳しく説明すると、上記中央付近の
列のフィンガー1の中で、シンブル管用セルの部分はフ
ィンガーが欠けている部分があり、この部分では上記列
のフィンガー1の内、中央から1つ隣のフィンガー1b
がキーKの先端部を受ける。そして、その他の場合は中
央のフィンガー1aがキーKの先端部を受けることにな
る。
This will be explained in detail. Among the fingers 1 in the row near the center, there is a portion where the thimble tube cell lacks a finger. In this portion, one of the fingers 1 in the row is from the center. Next finger 1b
Receives the tip of key K. In other cases, the central finger 1a receives the tip of the key K.

【0016】なお、フィンガーブロックFの両側の最前
列のフィンガー1,2はキーを挿入しないため、前記上
下1対の突起部5、6はなく、従って前記突起部5、6
の間の規定から外れることになる。
Since the keys are not inserted in the front rows of fingers 1 and 2 on both sides of the finger block F, there is no pair of upper and lower protrusions 5 and 6, and therefore the protrusions 5 and 6 are provided.
It will be out of the regulation between.

【0017】これに対し、上記中央の列のフィンガー1
を除いた残りのフィンガー2は、キーKの挿入し易さを
確保するために、上下突起部の間隔は図3に示す如く広
めに設けられている。
On the other hand, the fingers 1 in the central row are
The remaining fingers 2 except for are provided with a wide interval between the upper and lower protrusions in order to ensure the ease of inserting the key K.

【0018】しかして、上記本発明実施例のフィンガー
ブロックFにおいては、図6に示す如く、フィンガーブ
ロックFに支持格子Sをセットし、このフィンガーブロ
ックFを左右に開動することによって支持格子Sの弾性
突起3を押圧した後、キーKの挿入深さを決める位置決
めブロック7を介してキーKを挿入する。この際、上記
実施例のフィンガーブロックFでは、図1、図2に示す
如く、キーKの先端部を受けるフィンガー1の前記突起
部5、6の間隔を、このキーKの軸幅程度となしたこと
から、図7に示す如くキーKの先端が上下に位置ずれす
ることなく、位置決めが正確に行われるようになり、キ
ーKの水平な挿入とその位置での回転とを容易に行うこ
とが可能である。
In the finger block F of the embodiment of the present invention, however, as shown in FIG. 6, the supporting grid S is set on the finger block F, and the finger block F is moved to the left and right to open the supporting grid S. After pressing the elastic protrusion 3, the key K is inserted through the positioning block 7 that determines the insertion depth of the key K. At this time, in the finger block F of the above-described embodiment, as shown in FIGS. 1 and 2, the interval between the protrusions 5 and 6 of the finger 1 that receives the tip of the key K is set to be about the axial width of the key K. Therefore, as shown in FIG. 7, the tip of the key K can be accurately positioned without being vertically displaced, and the key K can be easily inserted horizontally and rotated at that position. Is possible.

【0019】以上、本発明の実施例を説明したが、フィ
ンガー1における突起部5、6に、キーKを挿入しやす
くするためのすりばち状の案内面を形成することも可能
である。また、両側から挿入される1対のキーKに対
し、例えば図1に示す如く、その2つの先端部を1本の
フィンガーがまとめて受ける場合は、このフィンガー1
においてのみ、上下突起部5、6の間をキーの軸幅程と
することも可能である。
Although the embodiment of the present invention has been described above, it is also possible to form a gusset-shaped guide surface on the projections 5 and 6 of the finger 1 to facilitate insertion of the key K. In addition, when a pair of keys K inserted from both sides receives their two tip portions collectively as shown in FIG.
It is also possible to make the space between the upper and lower protrusions 5 and 6 approximately the same as the axial width of the key.

【0020】[0020]

【発明の効果】以上説明したように、本発明のキー挿入
用フィンガーブロックは、支持格子の各セルに挿入され
る多数のフィンガーを有し、このフィンガーの一部を支
持格子の弾性突起に接当して押圧するフィンガーブロッ
クにおいて、上記フィンガーの押圧側の側部に、この押
圧方向と直交して挿入されるキーをその間に嵌挿させる
上下1対の突起部を形成すると共に、上記キーの先端部
を受けるフィンガーの上記突起部の間隔を、このキーの
軸部の幅程度に形成したものであり、キー先端部を受け
るフィンガーの突起間隔をこのキーの軸幅程度となした
ことから、前記短尺キーにおいてもキー先端部の位置決
めが正確に行われるようになり、キーの水平な挿入とそ
の位置での回転とを容易かつ確実に行わしめるとの顕著
な効果を奏するものである。
As described above, the key insertion finger block of the present invention has a large number of fingers which are inserted into each cell of the supporting grid, and a part of these fingers is brought into contact with the elastic projections of the supporting grid. In the finger block to be pressed against, a pair of upper and lower projections into which a key inserted perpendicular to the pressing direction is inserted are formed on the side of the pressing side of the finger, and The interval between the protrusions of the fingers that receive the tip is formed to be about the width of the shaft of this key, and the interval between the protrusions of the fingers that receive the tip of the key is set to be the axial width of this key. Even in the short key, the tip of the key can be accurately positioned, and there is a remarkable effect that horizontal insertion of the key and rotation at that position can be performed easily and reliably. It is.

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

【図1】本発明実施例のフィンガーブロックの使用状態
を示す断面図である。
FIG. 1 is a cross-sectional view showing a usage state of a finger block according to an embodiment of the present invention.

【図2】同フィンガーブロックのキー先端部を受けるフ
ィンガーを示す側面図である。
FIG. 2 is a side view showing a finger that receives a key tip portion of the finger block.

【図3】同実施例のその他のフィンガーを示す側面図で
ある。
FIG. 3 is a side view showing another finger of the embodiment.

【図4】同実施例のフィンガーブロックの全体図であ
る。
FIG. 4 is an overall view of a finger block according to the same embodiment.

【図5】同フィンガーブロックの使用方法を示す斜視図
である。
FIG. 5 is a perspective view showing a method of using the finger block.

【図6】同、斜視図である。FIG. 6 is a perspective view of the same.

【図7】キー先端の位置ずれを示す断面図である。FIG. 7 is a cross-sectional view showing a positional deviation of a key tip.

【図8】(A)支持格子セルの平面図である。 (B)同、正面図である。FIG. 8 (A) is a plan view of a supporting grid cell. (B) The same is a front view.

【図9】(A)キーの使用状態を示す平面図である。 (B)同、正面図である。FIG. 9 is a plan view showing a usage state of the (A) key. (B) The same is a front view.

【符号の説明】[Explanation of symbols]

1 フィンガー 2 フィンガー 3 弾性突起 4 中央突起 5 上部突起部 6 下部突起部 7 位置決めブロック F フィンガーブロック K キー S 支持格子 1 Finger 2 Finger 3 Elastic Protrusion 4 Center Protrusion 5 Upper Protrusion 6 Lower Protrusion 7 Positioning Block F Finger Block K Key S Support Grid

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 支持格子の各セルに挿入される多数のフ
ィンガーを有し、このフィンガーの一部を支持格子の弾
性突起に接当して押圧するキー挿入用フィンガーブロッ
クにおいて、上記フィンガーの押圧側の側部に、この押
圧方向と直交して挿入されるキーをその間に嵌挿させる
上下1対の突起部を形成すると共に、上記キーの先端部
を受けるフィンガーの上記突起部の間隔を、このキーの
軸部の幅程度に形成したことを特徴とするキー挿入用フ
ィンガーブロック。
1. A key block for finger insertion, comprising a large number of fingers to be inserted into each cell of a support grid, and pressing a part of the fingers against an elastic projection of the support grid to press the fingers. On the side portion on the side, a pair of upper and lower projections into which a key to be inserted orthogonal to the pressing direction is inserted are formed, and the interval between the projections of the fingers that receive the tip of the key is A finger block for key insertion, characterized in that the finger block is formed to have a width approximately equal to the width of the shaft portion of the key.
JP7316061A 1995-11-08 1995-11-08 Finger block for key insertion Withdrawn JPH09133785A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7316061A JPH09133785A (en) 1995-11-08 1995-11-08 Finger block for key insertion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7316061A JPH09133785A (en) 1995-11-08 1995-11-08 Finger block for key insertion

Publications (1)

Publication Number Publication Date
JPH09133785A true JPH09133785A (en) 1997-05-20

Family

ID=18072832

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7316061A Withdrawn JPH09133785A (en) 1995-11-08 1995-11-08 Finger block for key insertion

Country Status (1)

Country Link
JP (1) JPH09133785A (en)

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A300 Withdrawal of application because of no request for examination

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Effective date: 20030204