KR101598972B1 - An working radiation shielding fake wall - Google Patents

An working radiation shielding fake wall Download PDF

Info

Publication number
KR101598972B1
KR101598972B1 KR1020140108240A KR20140108240A KR101598972B1 KR 101598972 B1 KR101598972 B1 KR 101598972B1 KR 1020140108240 A KR1020140108240 A KR 1020140108240A KR 20140108240 A KR20140108240 A KR 20140108240A KR 101598972 B1 KR101598972 B1 KR 101598972B1
Authority
KR
South Korea
Prior art keywords
lead
radiation shielding
lead glass
wall
shield
Prior art date
Application number
KR1020140108240A
Other languages
Korean (ko)
Inventor
장동규
Original Assignee
주식회사 액트알엠티
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 주식회사 액트알엠티 filed Critical 주식회사 액트알엠티
Priority to KR1020140108240A priority Critical patent/KR101598972B1/en
Application granted granted Critical
Publication of KR101598972B1 publication Critical patent/KR101598972B1/en

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/02—Selection of uniform shielding materials
    • G21F1/06—Ceramics; Glasses; Refractories
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
    • G21F1/00—Shielding characterised by the composition of the materials
    • G21F1/12—Laminated shielding materials

Abstract

The present invention relates to a radiation shielding fake wall for work. The present invention allows a worker to observe and recognize a situation around a workshop easily with only simple operations when needed, definitely protects lead glass from a physical impact during storage, transport, and work, and secures sufficient radiation shielding performance even if a sufficiently thin piece of lead glass is used. The wall of the present invention comprises: two guide rail pairs having a flat cross-section in the shape of ′ᄃ′ which are vertically fixated and mounted to be parallel on the front surface and the rear surface of a lead shielding body on the outside of both side end units of the lead glass; ′∩′ and, a shielding plate having a side cross-section bent in the shape of ′∩′, which is inserted between the two guide rail pairs to be able to vertically operate following the guide rail pairs.

Description

작업용 방사선차폐가벽{An working radiation shielding fake wall}An operating radiation shielding fake wall < RTI ID = 0.0 >

본 발명은 작업용 방사선차폐가벽에 관한 것으로, 더욱 상세하게는 두께가 얇은 비교적 저렴한 납유리를 사용하면서도 충분한 방사선차폐 성능을 갖으면서도 보관/운반 중이거나 사용 중에 납유리를 물리적인 충격으로 부터 보호할 수 있는 구조를 갖도록 한 작업용 방사선차폐가벽에 관한 것이다.[0001] The present invention relates to a radiation shielding for work, and more particularly to a radiation shielding apparatus for protecting a lead glass from physical impact during storage or transportation while using a relatively low-cost lead glass with a thin thickness and sufficient radiation shielding performance The radiation shielding for work is a wall.

일반적으로 원자력 발전소 등에서 방사선량 측정 등의 작업시 작업자의 피폭 을 저감을 위한 방법은 방사선량 측정자가 납 장갑 및 납치마를 착용하고, 텔레텍터(Teletector) 등을 이용하여 고준위 방사선원으로부터 제한적인 거리를 이격하거나 납 담요로 고준위 필터나 폐기물 드럼의 상부만을 차폐하기 때문에 드럼하부에서 방출하는 방사선에 의한 피폭은 피할 수 없다는 문제점이 있었고, 또한, 종래의 방법은 방사선 안전 사고 발생시 방사선 피폭에 항상 노출되고, 상기와 같은 문제점외에 중량이 무거운 납 장갑 및 납치마를 착용하고 작업을 함에 따라 작업자가 불편한 점을 고려하여 방사선 피폭으로 부터 작업 중인 작업자를 보호하면서도 작업자가 주변의 상황을 용이하게 관찰할 수 있는 구조를 갖도록 한 작업용 방사선 차페가벽을 사용하고 있다.Generally, in order to reduce the exposure of the workers in the radiation dose measurement work such as nuclear power plants, the radiation dose measurer wears the lead gloves and the kidnapping machine and uses a teletector or the like to separate the limited distance from the high level radiation source Since the high level filter or the upper portion of the waste drum is shielded by the lead blanket, the exposure by the radiation emitted from the lower portion of the drum can not be avoided. Further, the conventional method is always exposed to radiation exposure in case of a radiation safety accident, In addition to the above problems, it is necessary to have a structure that allows the operator to easily observe the surrounding situation while protecting the worker from radiation exposure considering the inconvenience of the worker by wearing heavy lead gloves and kidnapping. One working radiation chafe uses a wall. The.

도 1은 종래의 작업용 방사선 차폐가벽을 도시한 설치상태 사시도이다.BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an installation state of a conventional radiation shield for work. FIG.

도 1을 참조하면, 종래의 작업용 방사선 차폐가벽은 여러 개로 구획된 전면 구조체(11)와, 상기 전면 구조체(11)의 양측에 접철 가능하도록 경첩(12)으로 연결된 좌측 및 우측 구조체(13, 14)와, 상기 전면, 좌측 및 우측 구조체(11, 13, 14)의 구획된 부분에 각각 삽입된 납 차폐체(15)와, 상기 전면 구조체(11)의 상부에 삽입된 납 차폐체(15)의 중앙부에 작업자가 작업을 하는 데 시야를 확보하도록 삽입된 납 유리(16)와, 상기 전면 구조체(11)의 중앙부에 삽입된 납 차폐체(15)의 일측으로 치우친 위치에 방사선량 측정장비를 삽입하여 원활하게 움직일 수 있도록 형성된 원형의 홀(17)과, 상기 전면 구조체(11)의 하부 양측에 설치된 구름 바퀴(18)와, 상기 좌측 및 우측 구조체(13, 14)의 하부 후측에 형성된 차폐막 지지대(19)를 포함하고 있다.Referring to FIG. 1, a conventional working radiation shielding structure includes a front structure 11 partitioned into a plurality of walls, left and right structures 13 and 13 connected by hinges 12 so as to be foldable on both sides of the front structure 11, A lead shield 15 embedded in the divided portions of the front, left and right structures 11, 13 and 14 and a lead shield 15 embedded in the top of the front structure 11, A lead glass 16 inserted in the central portion to secure a field of view for an operator to work and a radiation dose measuring device inserted at a position offset to one side of the lead shield 15 inserted in the central portion of the front structure 11 A rolling wheel 18 installed on both sides of the lower part of the front structure 11 and a shielding film support 18 formed on the lower rear side of the left and right structures 13 and 14, 19).

그러나, 상기와 같은 구성을 갖는 종래의 작업용 방사선 차폐가벽은 납유리를 통해 작업중인 작업자가 수시로 작업장 주변상황을 관찰하고 인지하면서 자업할 수 있는 장점이 있지만, 충분한 방사선차폐성능을 구비하고 위해서는 충분한 두께를 갖는 납유리를 사용해야 함으로 제작비용이 매우 높고, 보관/운반 중이나 EH는 작업 중에 외부의 물리적인 충격에 의해 고가의 납유리가 파손될 수 있다는 문제점이 있었다.However, in the conventional working radiation shielding having the above-described structure, the wall is advantageous in that the worker who is working through the lead glass observes the situation around the worksite from time to time and can work on his own, The manufacturing cost is very high and there is a problem that the expensive lead glass may be damaged due to the external physical impact during the storage / transportation and during the operation.

본 발명은 상기와 같은 종래의 문제점을 고려하여 안출한 것으로서, 그 목적은 작업 중인 작업자가 필요시에 간단한 조작만으로 용이하게 작업장 주변상황을 관찰 및 인지할 수 있으면서도 보관/운반 및 작업 중에 물리적인 충격으로 부터 납유리를 확실하게 보호할 수 있을 뿐만 아니라 비교적 얇은 두께의 납유리를 사용하면서도 충분한 방사선차폐성능을 확보할 수 있는 작업용 방사선 차폐가벽을 제공하는 것이다.The present invention has been made in view of the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method and apparatus which can easily observe and recognize the circumference of a worksite by a simple operation when necessary, The present invention provides a workable radiation shielding wall that can securely protect a lead glass from a light source and can secure sufficient radiation shielding performance while using a relatively thin thickness of lead glass.

상기 본 발명의 목적은 여러 개로 구획된 전면 구조체와, 상기 전면 구조체의 양측에 절첩 가능하도록 경첩으로 연결된 좌측 및 우측 구조체와, 상기 전면, 좌측 및 우측 구조체의 구획된 부분에 각각 삽입된 납 차폐체와, 상기 전면 구조체의 상부에 삽입된 납 차폐체의 중앙부에 작업자가 작업을 하는 데 시야를 확보하도록 삽입된 납 유리와, 상기 전면 구조체의 중앙부에 삽입된 납 차폐체의 일측으로 치우친 위치에 방사선량 측정장비를 삽입하여 원활하게 움직일 수 있도록 형성된 원형의 홀과, 상기 전면 구조체의 하부 양측에 설치된 구름 바퀴와, 상기 좌측 및 우측 구조체의 하부 후측에 형성된 차폐막 지지대를 포함하는 작업용 방사선 차폐가벽에 있어서, 상기 방사선 차폐가벽은 'ㄷ'자 형상을 갖는 평단면을 갖고, 상기 납유리의 양측단부 외측 납차폐체의 전후면에 각각 수직으로 상호 평행하게 고정장착되는 2개의 가이드레일쌍과; '∩' 형상으로 절곡형성된 측단면을 갖고, 상기 2개의 가이드레일쌍 사이에 가이드레일쌍을 따라 상하작동가능하게 끼움조립되는 차단판을 포함하는 것을 특징으로 하는 작업용 방사선 차폐가벽에 의해 달성될 수 있는 것이다.The above and other objects can be accomplished by the provision of a lead shield which is inserted into a divided part of the front, left and right structures, respectively, A lead glass inserted in the central part of the lead shield inserted in the upper part of the front structure so as to secure a field of view for an operator to perform a work and a radiation dose measuring device at a position offset to one side of the lead shield inserted in the central part of the front structure And a shielding film supporter formed on a rear side of the lower side of the left and right structures, wherein the wall has a circular hole formed so as to be able to move smoothly by inserting the protrusion, The radiation shielding wall has a flat cross-section having a " C " shape, and the outer side of both ends of the lead glass Two guide rail pairs fixedly mounted on the front and rear surfaces of the lead shield in parallel to each other and perpendicular to each other; And a shielding plate having a side end section bent in a shape of '?' And being assembled to be vertically movably fitted along a pair of guide rails between the two pairs of guide rails is achieved by a wall You can.

본 발명에 따른 작업용 방사선 차폐가벽은 비교적 얇은 두께의 납유리를 사용하고, 납유리의 전후면에 상하작동가능하게 장착되어 납유리를 물리적으로 보호하는 차단판을 구비하도록 함으로서, 제작단가를 현저히 낮추면서도 충분한 방사선차폐성능을 확보하고 작업자가 필요시 마다 차단판을 간단한 조작으로 납유리를 덮고있는 차단판을 제거하여(열어) 작업장 주변상황을 관찰할 수 있어 보다 안전하고 효율적인 작업을 실시할 수 있는 효과를 갖는다.The working radiation shielding wall according to the present invention uses a relatively thin thickness of lead glass and is provided on the front and rear surfaces of the lead glass so as to be vertically movable so as to physically protect the lead glass. The radiation shielding performance can be ensured and the operator can observe the circumference of the workplace by removing (opening) the shielding plate covering the lead glass with a simple operation whenever necessary, so that the work can be performed more safely and efficiently .

도 1은 종래의 작업용 방사선 차폐가벽를 도시한 설치상태 사시도이고,
도 2는 본 발명에 따른 작업용 방사선 차폐가벽를 도시한 부분확대 사시도이고,
도 3은 본 발명에 따른 작업용 방사선 차폐가벽의 납유리부분을 단면하여 도시한 종단면도이며,
도 4는 본 발명에 따른 작업용 방사선 차폐가벽 중 차단판의 차단판고정부재의 구조를 부분절취하여 도시한 부분절취 확대 단면도이다.FIG. 1 is a perspective view of a conventional radiation shield for work,
FIG. 2 is a partially enlarged perspective view showing a wall for working radiation shielding according to the present invention,
Fig. 3 is a longitudinal sectional view showing a part of a lead glass of a wall of a wall of a working radiation shield according to the present invention,
4 is a partially cut-away enlarged cross-sectional view showing a part of the structure of the shielding plate fixing member of the shielding plate for working radiation shielding according to the present invention.

이하, 첨부된 도면을 참조하여, 본 발명에 따른 작업용 방사선 차폐가벽의 바람직한 실시 예에 대하여 구체적으로 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to a preferred embodiment of a wall for working radiation shielding according to the present invention, with reference to the accompanying drawings.

도 2 내지 도 4를 참조하면, 본 발명에 따른 작업용 방사선 차폐가벽(20)는 상기 종래의 작업용 방사선 차폐가벽에 2개의 가이드쌍(30)(31)과, 차단판(40)을 더 포함한다.2 to 4, the working radiation shielding wall 20 according to the present invention is characterized in that the conventional working radiation shielding comprises two guide pairs 30, 31 on the wall and a shield plate 40 .

상기 2개의 가이드레일(30)(31)은 'ㄷ'자 형상을 갖는 평단면을 갖고, 상기 납유리(21)의 양측단부 외측 납차폐체(22)의 전후면에 각각 수직으로 상호 평행하게 고정장착된다.The two guide rails 30 and 31 have a flat surface having a U shape and are fixedly mounted on the front and rear surfaces of the outer side lead shield 22 on both sides of the lead glass 21, do.

상기 2개의 가이드레일(30)(31) 중 상기 납차폐체(22)의 후면상에 장착된 가이드레일쌍(30)은 대향되는 내측단부를 따라 상호 대향되는 형성되는 다수개의 걸림홈(30a)을 갖는다.The pair of guide rails 30 mounted on the rear surface of the lead shield 22 of the two guide rails 30 and 31 have a plurality of engaging grooves 30a formed to face each other along opposite inner ends .

상기 차단판(40)은 '∩' 형상으로 절곡형성된 측단면을 갖고, 상기 2개의 가이드레일쌍(30)(31) 사이에 가이드레일쌍(30)(31)을 따라 상하작동가능하게 끼움조립되어 상기 납유리(21)의 전후면을 보호하고, 차단판고정부재(41)를 구비한다.The shield plate 40 has a side end section bent in the shape of an inverted U-like shape and is vertically movably fitted between the pair of guide rails 30 and 31 along the pair of guide rails 30 and 31 And protects the front and rear surfaces of the lead glass 21 and includes a blocking plate fixing member 41.

상기 차단판고정부재(41)는 후면측 하단부 양측단에 수평으로 대향되게 작동되는 2개의 스토퍼(41a)(41a')와, 상기 스토퍼(41a)(41a') 사이에 장착되어 상기 2개의 스토퍼(41a)(41a')를 외향으로 탄성지지하는 스프링부재(41b)와, 상기 2개의 스토퍼(41a)(41a')의 후단부에 후방으로 돌출형성되어 상기 스토퍼(41a)(41a')를 대향되게 내향으로 작동시키는 걸림해제레버(41c)(41c')로 구성된다.The blocking plate fixing member 41 includes two stoppers 41a and 41a 'that are horizontally opposed to both ends of the lower side of the rear surface side, and two stoppers 41a and 41b' mounted between the stoppers 41a and 41a ' A spring member 41b for elastically supporting the first and second stoppers 41a and 41a 'outwardly and a stopper 41b protruding rearward from the rear end of the two stoppers 41a and 41a' And engaging release levers 41c and 41c 'that operate in opposite inward directions.

상기와 같은 구성을 갖는 본 발명에 따른 작업용 방사선 차폐가벽(20)은 상하작동가능하게 장착되는 차단판(40)이 납유리(21)를 보호하고 있어 비교적 얇고, 저렴한 납유리를 사용하여도 차단판(40)의 차폐성능을 보완하여 주게됨으로 방사선차페성능이 저하되지 않을 뿐만 아니라 보관/운반 및 사용 중에 외부 충격으로 부터 납유리(21)를 보호할 수 있음은 물론 작업 중인 작업자가 필요시 마다 차단판(40)을 올려 작업장 주변상황을 관찰할 수 있어 보다 안전하고 효율적인 작업을 실시할 수 있는 것이다.The radiation shielding wall 20 according to the present invention having the above-described construction protects the lead glass 21 by means of the shielding plate 40, which is vertically and operably mounted, so that even when a relatively thin and inexpensive lead glass is used, It is possible to protect the lead glass 21 from an external impact during storage / transportation and use, as well as to prevent the radiation shielding performance from being deteriorated because the shielding performance of the shield plate 40 is compensated. It is possible to observe the situation around the worksite by raising the door 40 so that the work can be performed more safely and efficiently.

20: 작업용 방사선 차폐가벽 21: 납유리
22: 납차폐체 30, 31: 가이드레일쌍
40: 차단판 41: 차단판고정부재20: Working radiation shielding wall 21: Lead glass
22: lead shield 30, 31: guide rail pair
40: blocking plate 41: blocking plate fixing member

Claims (2)

여러 개로 구획된 전면 구조체와, 상기 전면 구조체의 양측에 절첩 가능하도록 경첩으로 연결된 좌측 및 우측 구조체와, 상기 전면, 좌측 및 우측 구조체의 구획된 부분에 각각 삽입된 납 차폐체와, 상기 전면 구조체의 상부에 삽입된 납 차폐체의 중앙부에 작업자가 작업을 하는데 시야를 확보하도록 삽입된 납 유리와, 상기 전면 구조체의 중앙부에 삽입된 납차폐체의 일측으로 치우친 위치에 방사선량 측정장비를 삽입하여 원활하게 움직일 수 있도록 형성된 원형의 홀과, 상기 전면 구조체의 하부 양측에 설치된 구름 바퀴와, 상기 좌측 및 우측 구조체의 하부 후측에 형성된 차폐막 지지대를 포함하는 작업용 방사선 차폐가벽에 있어서,
상기 방사선 차폐가벽(20)은,
'ㄷ'자 형상을 갖는 평단면을 갖고, 상기 납유리(21)의 양측단부 외측 납차폐체(22)의 전후면에 각각 수직으로 상호 평행하게 고정장착되는 2개의 가이드레일쌍(30)(31)과;
'∩' 형상으로 절곡형성된 측단면을 갖고, 상기 2개의 가이드레일쌍(30)(31) 사이에 가이드레일쌍(30)(31)을 따라 상하작동가능하게 끼움조립되는 차단판(40)을 포함하는 것을 특징으로 하는 작업용 방사선 차폐가벽.A left and right side structure connected to the front structure by hinges so as to be foldable on both sides of the front structure, a lead shield inserted into the divided portions of the front, left and right structures respectively, A lead glass inserted in the central portion of the lead shield inserted in the central portion of the front structure to secure a field of view for an operator to perform work and a radiation dose measuring device inserted in a position offset to one side of the lead shield, A rolling wheel installed on both sides of the lower portion of the front structure and a shielding film support formed on a lower rear side of the left and right structures,
The radiation shielding wall (20)
Two pairs of guide rails 30 (31) having a flat cross section having a "C" shape and fixedly mounted on the front and rear surfaces of the outer side lead shield 22 on both sides of the lead glass 21, and;
A shield plate 40 having a side end section bent in a shape of '?' And being assembled to be vertically operable along the pair of guide rails 30 and 31 between the two guide rail pairs 30 and 31 Characterized in that the working radiation shielding wall. 삭제delete
KR1020140108240A 2014-08-20 2014-08-20 An working radiation shielding fake wall KR101598972B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020140108240A KR101598972B1 (en) 2014-08-20 2014-08-20 An working radiation shielding fake wall

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020140108240A KR101598972B1 (en) 2014-08-20 2014-08-20 An working radiation shielding fake wall

Publications (1)

Publication Number Publication Date
KR101598972B1 true KR101598972B1 (en) 2016-03-02

Family

ID=55582680

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020140108240A KR101598972B1 (en) 2014-08-20 2014-08-20 An working radiation shielding fake wall

Country Status (1)

Country Link
KR (1) KR101598972B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016223490A1 (en) * 2016-11-25 2018-01-11 Siemens Healthcare Gmbh System with a gantry and a radiation protection cabin and method for operating a medical imaging device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200321437Y1 (en) * 2003-04-30 2003-07-28 고려공업검사 주식회사 Movable radial shielding device for high radial field
KR20050121636A (en) * 2002-04-17 2005-12-27 르메르 쁘로떽시옹 앙띠-엑스 빠르 아브레비아숑 소시에떼 르베르 빡스 Screen for protection against ionising radiation emissions
CN201085630Y (en) * 2007-08-03 2008-07-16 麻立克 Mobile percutaneous intervention room for interposition treatment
JP2010257716A (en) * 2009-04-23 2010-11-11 Nakagawa Kasei Kk Fluorescent lamp cover, protection structure of fluorescent lamp and its installation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050121636A (en) * 2002-04-17 2005-12-27 르메르 쁘로떽시옹 앙띠-엑스 빠르 아브레비아숑 소시에떼 르베르 빡스 Screen for protection against ionising radiation emissions
KR200321437Y1 (en) * 2003-04-30 2003-07-28 고려공업검사 주식회사 Movable radial shielding device for high radial field
CN201085630Y (en) * 2007-08-03 2008-07-16 麻立克 Mobile percutaneous intervention room for interposition treatment
JP2010257716A (en) * 2009-04-23 2010-11-11 Nakagawa Kasei Kk Fluorescent lamp cover, protection structure of fluorescent lamp and its installation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016223490A1 (en) * 2016-11-25 2018-01-11 Siemens Healthcare Gmbh System with a gantry and a radiation protection cabin and method for operating a medical imaging device
US10653370B2 (en) 2016-11-25 2020-05-19 Siemens Healthcare Gmbh System with a gantry and a radiation protection booth and method for operating a medical imaging apparatus
US11141118B2 (en) 2016-11-25 2021-10-12 Siemens Healthcare Gmbh System with a gantry and a radiation protection booth and method for operating a medical imaging apparatus

Similar Documents

Publication Publication Date Title
CN108882771B (en) Face protection device
ES2741286T3 (en) Protection set for speed sensing device of an elevator braking set and method
ATE121201T1 (en) GLASSES, ESPECIALLY SAFETY GLASSES.
KR101598972B1 (en) An working radiation shielding fake wall
BR112014031114A2 (en) retractable pet guide with protective housing
EP3201928B1 (en) Protection devices for gamma radiography
US20180243594A1 (en) Shuttle device
KR200321437Y1 (en) Movable radial shielding device for high radial field
JP2015208189A (en) electrical junction box
KR101478521B1 (en) Optical filter holding system for welding mask
WO2006086318A3 (en) Safety shield for use with different diameter racking rods and an adaptor for use therewith
KR200477512Y1 (en) Safety helmet attached with radiation detector
JP6116726B1 (en) Stepladder protective material
IT201700010919A1 (en) Improved machine tool.
KR102249286B1 (en) Safety access apparatus for grating
JP2016155642A (en) Door closing force checking device
JP3206780U (en) Welding surface
KR200429015Y1 (en) Attachable anti-noise earplugs
DE602005018440D1 (en) Blocking detection in a telecommunication network
KR100924916B1 (en) A measuring instrument for radiation dose rate
JP5996739B1 (en) Protective cover for earthquake detector
KR20140005923U (en) Safety cap for file
KR200491748Y1 (en) Protection cover
KR101471593B1 (en) A protecting device for the opening of building
JP2002350587A (en) Radiation shield body and shield wall

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190219

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20200212

Year of fee payment: 5