JPH0631957U - Toggle pin - Google Patents
Toggle pinInfo
- Publication number
- JPH0631957U JPH0631957U JP6725792U JP6725792U JPH0631957U JP H0631957 U JPH0631957 U JP H0631957U JP 6725792 U JP6725792 U JP 6725792U JP 6725792 U JP6725792 U JP 6725792U JP H0631957 U JPH0631957 U JP H0631957U
- Authority
- JP
- Japan
- Prior art keywords
- washer
- mounting
- shaft
- spring
- shaft portion
- 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.)
- Pending
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- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Abstract
(57)【要約】
【目的】重量物の長時間持ち支えながらの取付けや、電
灯具類、パイプ接続等、高所や無理な姿勢での取付作業
の困難さを解消し、作業員数及び取付作業時間の減少
と、安全、迅速な取付作業を可能にする。
【構成】一端につば3を設けた軸部4の先端に、割り溝
5を通じ重心を偏倚させた回動片6を枢支ピン7で枢着
し、軸部4にワッシャー8と、該ワッシャー8とつば3
との間にばね9を嵌装し、回動片6をばね9及びワッシ
ャー8により、軸部4と一直線或いは軸部4と直角のT
字形の姿勢を保持し得るようにしてなるトグルピン1
を、取付物12と架台10の取付孔13、11を合わせ
て挿入し押すことにより、軸部4に対し回動片6が回動
しT字形姿勢を保持して仮止めする。
(57) [Summary] [Purpose] Eliminates the difficulty of mounting heavy objects for long periods of time, and the difficulty of mounting at high places or in unreasonable postures such as lighting fixtures, pipe connections, etc. It reduces the work time and enables safe and quick installation work. [Structure] A pivoting piece 6 whose center of gravity is biased through a split groove 5 is pivotally attached to a tip of a shaft portion 4 having a collar 3 at one end by a pivot pin 7, and a washer 8 and the washer are attached to the shaft portion 4. 8 and brim 3
A spring 9 is fitted between the shaft 4 and the rotary piece 6 by a spring 9 and a washer 8 so that the shaft 4 is aligned with the shaft 4 or at a right angle to the shaft 4.
Toggle pin 1 that can hold a character-shaped posture
By inserting and pushing the attachment 12 and the attachment holes 13 and 11 of the gantry 10, the rotating piece 6 rotates with respect to the shaft portion 4, and the T-shaped posture is maintained and temporarily fixed.
Description
【0001】[0001]
本考案は、架台、支柱等の取付孔に、灯具や分電盤(作業電源ボックス)、器 機類等の取付物の取付孔を合わせて、取付ボルト、ワッシャー、ナットで取付け る際に使用する仮止めピン(ジグ)に関するものである。 This invention is used when mounting holes such as lamps, distribution boards (working power supply box), and equipment to the mounting holes of the pedestal and columns, and mounting with mounting bolts, washers, and nuts. It relates to a temporary fixing pin (jig).
【0002】[0002]
従来、各工場内の高い位置にある数ある電灯具や、3〜4人で持ち支える重量 物の分電盤、機器類の取付け、その他高い位置に吊り下げた状態でパイプフラン ジどうしを接続する等の取付け作業は、これら取付物を支えながらその取付孔を 架台、支柱等の取付孔に合わせ、ボルト・ナットで直接取り付けている。 Conventionally, there are many lighting fixtures at high positions in each factory, heavy distribution boards supported by 3 to 4 people, installation of equipment, etc. Other pipe flanges are connected while suspended at high positions. For mounting work such as mounting, the mounting holes are aligned with the mounting holes of the pedestal, columns, etc. while supporting these mounting objects, and are directly mounted with bolts and nuts.
【0003】[0003]
このような取付作業は、他の工作物などの輻湊した場所と、無理な姿勢で重量 物を持ち支えて扱うため、また、電灯具やパイプラインのパイプフランジの接続 等の場合は、高い所が多いので重量物の長時間の支持と無理な姿勢のために、作 業も面倒で疲れることと、腰が痛むといった常態になりやすい問題点がある。 This kind of mounting work involves handling heavy objects in an uncomfortable posture with a congested place such as another work piece, and in the case of connecting a light fixture or a pipe flange of a pipeline, it is a high place. Since there are many cases, heavy work for a long time and an unreasonable posture make the work troublesome and tired, and the back tends to be painful.
【0004】 例えば中、または小型分電盤の取付けは、図6(A)に示すように3名か4名 程度で支え持ち、他の一人が取付物と架台の合致した取付孔に、直接に取付ボル ト、ワッシャー、ナットで固定する方法をとっており、取付終了まで重量物を持 ち支えていなければならない。For example, as shown in FIG. 6 (A), when mounting a medium or small distribution board, it is supported by about three or four people, and the other person directly supports the mounting hole where the mounting object and the mount match. The mounting bolts, washers, and nuts are used to secure to, and heavy objects must be held and supported until the end of mounting.
【0005】 また、図6(B)に示すように、工場内の灯具の取付作業は2名で行う。これ は通常40Wの電灯具を1名で取付ける場合、足場上で肩に電灯具を乗せ片手で ボルトを孔に合わせ持ち、片手でワッシャー、ナットを締めるため、よくワッシ ャー、ナット類を落とすことがあり、作業が困難であることと、この作業にはあ る程度の熟練を要する上に、この方法で1人作業となると安全性にも問題がある ので、通常は2人作業を余儀なくされている。Further, as shown in FIG. 6 (B), two people perform the work of mounting the lamp in the factory. This is usually when one person installs a 40W light fixture, put the light fixture on the shoulder on the scaffold, hold the bolt with the hole with one hand, and tighten the washer and nut with one hand, so drop the washers and nuts well. However, the work is difficult and requires a certain amount of skill. In addition, there is a safety problem when one person works by this method, so two people are usually forced to work. ing.
【0006】 本考案は、このような問題点を解消するための改善ジグを開発し、取付け作業 が楽に、且つ安全、迅速に行うことができるようにすることを目的とするもので ある。An object of the present invention is to develop an improved jig for solving such a problem so that the mounting work can be performed easily, safely and promptly.
【0007】[0007]
上記目的を達成するために、本考案のトグルピンは、一端につばを設けた軸部 の先端に割り溝を設け、この割り溝に重心を偏倚して回動可能に回動片を枢支ピ ンで枢着し、該軸部にワッシャーと、該ワッシャーとつばとの間にばねを嵌装し 、回動片をワッシャー及びばねにより、軸部と一直線、或いは軸部と直角の姿勢 を保持するようにしてなるものである。 In order to achieve the above object, the toggle pin of the present invention is provided with a split groove at the tip of a shaft portion provided with a collar at one end, and the center of gravity is biased in the split groove to pivotally support the rotary piece. The spring is fitted between the shaft and the washer and between the washer and the collar, and the rotating piece is held in a straight line with the shaft or at a right angle to the shaft by the washer and the spring. It is something that is done.
【0008】[0008]
本考案品は、取付台の取付孔と被取付物の取付座に設けた取付孔とを合わせ、 これらの取付孔に本考案のトグルピンの軸部先端を挿入することにより、ワッシ ャーが押さればねが圧縮されるので、回動片はピン中心に重心の偏倚により回動 すると同時に、ばねの反発力により取付台背面で回動片の一端が押されて回動片 が軸部と直角のT字形の姿勢を保持して係止され、取付座を取付台に固定するこ とができると共に、取付物の重力がかかってもT字形で係止されるために、外れ る心配はない。又ばねの力により取付本体と取付部の厚みの変化にアジャストす る上、ワンタッチで本体が仮止めできる。 In the product of the present invention, the washer is pushed by aligning the mounting holes of the mounting base with the mounting holes provided in the mounting seat of the mounted object and inserting the tip of the shaft portion of the toggle pin of the present invention into these mounting holes. Since the spring is compressed, the rotating piece rotates due to the deviation of the center of gravity around the pin center, and at the same time, the repulsive force of the spring pushes one end of the rotating piece on the rear surface of the mounting base, so that the rotating piece is perpendicular to the shaft. The T-shaped posture is retained and locked, the mounting seat can be fixed to the mounting base, and even if the weight of the mounting object is applied, it is locked in the T-shape, so there is no risk of disengagement. In addition, the force of the spring adjusts to changes in the thickness of the mounting body and mounting portion, and the body can be temporarily fixed with one touch.
【0009】 また、装着されたトグルピンは、軸部のつば側を押すとワッシャーがばねに抗 して後退させ、回動片を軸部と一直線に回動させることにより、簡単に抜けるの で、順次に本締めの取付ボルトを通し、平ワッシャー、スプリングワッシャーを 嵌め、ナットを締めて固定する。Further, the attached toggle pin can be easily removed by pushing the flange side of the shaft portion, causing the washer to retract against the spring, and rotating the rotating piece in line with the shaft portion. Sequentially pass through the fully tightened mounting bolts, fit the flat washer and spring washer, and tighten the nut to secure.
【0010】 その使用の一例を説明すると、工場内において分電盤を取付ける時は、図4に 示すように、分電盤(ボックス)を3人程度の作業者で支え持ち、分電盤と架台 との相互の取付孔を合わせると共に、その内の作業者が片手で本トグルピンをそ の取付孔に挿入して押すことにより、ワッシャーがばねに抗して移動するため、 回動片が枢支ピンを中心に軸部と直角に回動され、ばねの力で回動片が架台背面 に軸部とT字形の姿勢を保持して係止され、つばと回動片とで本体と取付部を挟 持して瞬時に仮止めできる。その後、前記の要領で順次に本トグルピンを抜き、 取付ボルト及びワッシャー、ナットで締付け固定するもので、この際、重量物を 支え持ち支えることを必要としない。To explain an example of its use, when installing a distribution board in a factory, as shown in FIG. 4, the distribution board (box) is supported by about three workers, and The washer moves against the spring by aligning the mounting holes with the gantry and inserting the toggle pin with one hand into the mounting hole with one hand, and the washer moves against the spring. It is rotated at right angles to the shaft part around the support pin, and the rotating piece is locked by the force of the spring on the back surface of the pedestal while maintaining a T-shaped posture with the shaft part, and attached to the main body with the collar and rotating piece. The part can be clamped and temporarily fixed. After that, pull out the toggle pins in sequence as described above and tighten them with the mounting bolts, washers, and nuts. At this time, it is not necessary to support and support heavy objects.
【0011】[0011]
実施例について図面を参照して説明すると、図1及び図2は本考案のトグルピ ン1の斜視図及び平面図で、一端に偏平な摘み部2付きのつば3を有した軸部4 の先端に、割り溝5を設け、この割り溝5に軸部4とほぼ同径の頭部6′を有し 先を重くした偏平な回動片6の中間部を重心を偏倚させて枢支ピン7で枢着し、 該軸部にワッシャー8と、該ワッシャー8とつば3との間にばね9を嵌装し、ば ね9の両端をつば3及びワッシャー8に固定させ、回動片6をワッシャー8及び ばね9により、軸部と一直線、或いは軸部4と直角のT字形の姿勢を保持するよ うにしてなるものである。 1 and 2 are a perspective view and a plan view of a toggle pin 1 according to the present invention, in which an end of a shaft portion 4 having a flange 3 with a flat knob portion 2 at one end is shown. A split groove 5 is provided in the center of the flat pivot piece 6 having a head portion 6'having substantially the same diameter as the shaft portion 4 and a heavy weight at the tip. The spring 9 is pivotally attached at 7, and a spring 9 is fitted between the washer 8 and the washer 8 and the collar 3, and both ends of the spring 9 are fixed to the collar 3 and the washer 8. Is maintained by a washer 8 and a spring 9 in a T-shaped posture in a straight line with the shaft portion or at a right angle to the shaft portion 4.
【0012】 図3は、本トグルピン1による連結状態を示すもので、支柱又は架台10の取 付孔11に取付物12の取付孔13を合わせて、本トグルピン1を挿入してつば 3側を押すと、ばね9に抗してワッシャー8が後退して、回動片6から外れるた めに、回動片6は頭部6′による偏倚した重力で枢支ピン7を支点に回動して軸 部4と直角なT字形の姿勢をとると同時に、ばねの力で支柱又は架台10と取付 物12はつば3と回動片6で挟持され固定される。FIG. 3 shows a state of connection by the toggle pin 1, in which the attachment hole 13 of the support 12 is aligned with the attachment hole 11 of the support or the pedestal 10 and the toggle pin 1 is inserted to fix the collar 3 side. When pushed, the washer 8 retracts against the spring 9 and is disengaged from the rotating piece 6, so that the rotating piece 6 rotates about the pivot pin 7 as a fulcrum due to the biased gravity of the head 6 '. At the same time as taking a T-shaped posture perpendicular to the shaft portion 4, the column or pedestal 10 and the attachment 12 are clamped and fixed by the collar 3 and the rotating piece 6 by the force of the spring.
【0013】 図4は、工場内において分電盤14を所定の支柱架台15に取付ける際の作業 状態を示すもので、3人程度で作業電源の分電盤14を持ち支え、その取付座1 6の取付孔17を支柱架台15の取付孔18と合わせ、作業者が片手で本トグル ピン1を挿入して押し込むことにより、回動片6が自然に回動して軸部4のつば 3と回動片6とにより両者が仮止め固定されるものである。FIG. 4 shows a work state when the distribution board 14 is attached to a predetermined support stand 15 in a factory. About three people hold the distribution board 14 of the work power supply and support it. The mounting hole 17 of 6 is aligned with the mounting hole 18 of the column base 15, and the operator inserts and pushes in the toggle pin 1 with one hand. Both are temporarily fixed by the rotating piece 6.
【0014】 また、図6(B)に示すような高い位置にある各工場内に数ある電灯具の取付 けの場合も、脚立に上がった作業者が片手で電灯具を支持して取付孔を合わせ、 他方の手でトグルピン1を下からその一致させた取付孔に押し入れるこことによ り、前記と同様に回動片6が軸部4と直角に回動してT字形に係止して両者が簡 単に仮止できる。In addition, in the case of mounting a number of electric lamps in each factory at a high position as shown in FIG. 6B, an operator who has stepped up on a stepladder supports the electric lamps with one hand and attaches them. And push the toggle pin 1 into the matching mounting hole from below with the other hand. As described above, the rotating piece 6 rotates at a right angle to the shaft portion 4 to engage the T-shape. Both can be temporarily stopped simply by stopping.
【0015】 仮止め後は、軸部4のつば側を押すとワッシャー8が移動されるので、回動片 6を軸部4と一直線に戻すと、ばね9の勢いで前進してトグルピン1は前面に飛 び出し簡単に抜けるので、取付ボルトを通じ、ワッシャー、ナットで取付け固定 するものである。なお、仮止めとボルトによる固定の場合を説明したが、取付物 によっては本トグルピン1の装着だけで充分に取付けできるものもあり、以上の ものに限らず非常に広範囲の使用が可能である。After the temporary fixing, the washer 8 is moved by pushing the flange side of the shaft portion 4. Therefore, when the rotating piece 6 is returned to the shaft portion 4 in a straight line, the toggle pin 1 is moved forward by the force of the spring 9. Since it pops out to the front and can be easily removed, it is fixed by using washers and nuts through the mounting bolts. Although the case of temporary fixing and fixing with bolts has been described, some attachments can be sufficiently attached only by attaching the toggle pin 1, and the present invention is not limited to the above, and can be used in a very wide range.
【0016】 図5は、高い位置にあるパイプ19の接続の場合を示すもので、パイプフラン ジ20,20の孔を合わせ、本トグルピンを用いて仮止めすることも可能であり 、この場合、トグルピンの差込みによる位置合わせ、及びこれの差替えによるボ ルト止めも簡単にできる等、取付けは両手でできるので、ワッシャー、ナットの 落下の危険もなく、上を向いて作業する場合も楽に作業ができる。FIG. 5 shows a case of connecting the pipe 19 at a high position. It is also possible to align the holes of the pipe flanges 20 and 20 and temporarily fix using the toggle pin. In this case, Positioning by inserting the toggle pin, and bolt fixing by replacing it can be done easily, etc.Because the installation can be done with both hands, there is no danger of the washer or nut falling, and work can be done easily even when facing up .
【0017】[0017]
本考案は、各工場内の高い位置にある電灯具の取付や、小型、中型の分電盤 (作業電源ボックス)の取付など、他の工作物等の輻湊した場所と無理な姿勢を 余儀なくされる重量物の取付において、本考案のトグルピンは、重量物を支え持 っ作業者が、取付物本体と取付部の両取付孔に片手で押入するだけで、回動片が 偏倚した重力により回動して、軸部と直角なT字形姿勢を保持すると同時に、ば ね圧によりワッシャーと回動片とで本体と取付部の二者を挟持して、ワンタッチ で仮止めが完了するため、作業員数を減少できると共に、重量物を取扱う時間も 短時間で済み、作業者の負担及び作業時間を大幅に軽減できる。 The present invention requires an unreasonable posture with places where other work is congested, such as the installation of high-level lighting fixtures in each factory and the installation of small and medium-sized distribution boards (working power supply boxes). When mounting a heavy object, the toggle pin of the present invention can be rotated by the biased gravity due to the biased gravity by the operator holding the heavy object and pushing it into both the mounting holes of the mounting body and the mounting part with one hand. It moves to maintain a T-shaped posture at right angles to the shaft, and at the same time, the washer and the rotating piece clamp the two parts, the body and the mounting part, by means of spring pressure, and temporary fixing is completed with one touch. The number of workers can be reduced, and the time for handling heavy objects can be shortened, which significantly reduces the burden on workers and the working time.
【0018】 又、装着されたトグルピンは、軸部のつば側を押して回動片を軸部と一直線に 回動させると簡単に抜けるので、その取付孔へボルトを通じて平ワッシャー、ス プリングワッシャー、ナットによる取付作業が簡単にできて、この時、従来のよ うに重量物を持ち支えたり、または肩で支えている必要がなく、不自然な、困難 な姿勢から解放されるので、重量物の取付けや、高位置での取付作業において、 部品を落す心配もなく、楽に安全且つ迅速に取付作業ができ、その作業を簡易化 できる。さらに、ばねにより取付物本体の厚みの変化にもアジャストして取付が でき、また仮止めばかりでなく通常の広範囲の取付にも使用できる等の効果があ る。Further, the attached toggle pin can be easily removed by pushing the flange side of the shaft portion and rotating the rotating piece in a straight line with the shaft portion.Thus, a flat washer, a spring washer, and a nut are inserted through the mounting holes through the bolts. It is easy to install and does not need to support heavy objects or shoulders as in the past, and you can be released from an unnatural and difficult posture. Also, in the mounting work at a high position, there is no need to worry about dropping parts, and the mounting work can be performed easily, safely and quickly, and the work can be simplified. In addition, the spring can be used to adjust the thickness of the attachment body to adjust the attachment, and it can be used not only for temporary fixing but also for ordinary wide-range attachment.
【図1】本考案品の斜視図。FIG. 1 is a perspective view of the present invention.
【図2】同平面図FIG. 2 is a plan view of the same.
【図3】使用時の断面図。FIG. 3 is a cross-sectional view during use.
【図4】本考案品を用いた分電盤の取付けの使用状態を
示す説明図。FIG. 4 is an explanatory view showing a usage state of mounting a distribution board using the product of the present invention.
【図5】同パイプラインのパイプフランジの接続状態を
示す説明図。FIG. 5 is an explanatory view showing a connection state of pipe flanges of the pipeline.
【図6】(A)及び(B)は従来の取付作業状態を示す
説明図である。6A and 6B are explanatory views showing a conventional mounting operation state.
1 トグルピン 2 摘み部 3 つば 4 軸部 5 割り溝 6 回動片 6′回動片の頭部 7 枢支ピン 8 ワッシャー 9 ばね 10 架台又は支柱 11 架台又は支柱の取付孔 12 取付物 13 取付物の取付孔 14 分電盤 15 支柱架台 16 取付座 17,18 取付孔 19…パイプ 20…パイプフランジ 1 Toggle pin 2 Grip section 3 Collar 4 Shaft section 5 Split groove 6 Rotating piece 6'Rotating piece head 7 Pivoting pin 8 Washer 9 Spring 10 Frame or column 11 Mounting hole of column or column 12 Attachment 13 Attachment Mounting hole 14 Distribution board 15 Support frame 16 Mounting seat 17, 18 Mounting hole 19 ... Pipe 20 ... Pipe flange
Claims (1)
溝を通じて重心の偏倚により回動可能に回動片を枢着
し、該軸部にワッシャーと、該ワッシャーとつばとの間
にばねを嵌装し、回動片をばね及びワッシャーにより軸
部と一直線、或いは軸部と直角の姿勢を保持してなるト
グルピン。1. A pivoting piece is pivotally attached to the tip of a shaft portion having a collar at one end thereof through a split groove so as to be pivotable due to the deviation of the center of gravity, and between the washer, the washer and the collar. A toggle pin in which a spring is fitted and the rotating piece is held in a straight line with the shaft portion or at a right angle to the shaft portion by the spring and washer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6725792U JPH0631957U (en) | 1992-09-28 | 1992-09-28 | Toggle pin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6725792U JPH0631957U (en) | 1992-09-28 | 1992-09-28 | Toggle pin |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0631957U true JPH0631957U (en) | 1994-04-26 |
Family
ID=13339719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6725792U Pending JPH0631957U (en) | 1992-09-28 | 1992-09-28 | Toggle pin |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0631957U (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0842541A (en) * | 1994-07-29 | 1996-02-13 | Abc Trading Co Ltd | Architectural coupling member and coupling method |
JP2006300132A (en) * | 2005-04-18 | 2006-11-02 | Matsuba Seiko:Kk | Toggle pin |
JP2012122490A (en) * | 2010-12-06 | 2012-06-28 | Takigen Mfg Co Ltd | Self-support type metal fitting for panel material |
KR200467495Y1 (en) * | 2011-08-24 | 2013-06-14 | 하연향 | Road―Sign―Board |
JP2015209948A (en) * | 2014-04-30 | 2015-11-24 | 元旦ビューティ工業株式会社 | Fitting member, and fitting structure using the same |
KR102333509B1 (en) * | 2021-05-11 | 2021-12-01 | 장혜지 | Installation method using T-PARA BOLT when installing a solar structure on an existing steel structure |
CN114270057A (en) * | 2019-06-27 | 2022-04-01 | 时尚箱包股份有限公司 | Releasable fastening device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5977112A (en) * | 1982-10-23 | 1984-05-02 | 三井造船株式会社 | Method of fitting instrument |
-
1992
- 1992-09-28 JP JP6725792U patent/JPH0631957U/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5977112A (en) * | 1982-10-23 | 1984-05-02 | 三井造船株式会社 | Method of fitting instrument |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0842541A (en) * | 1994-07-29 | 1996-02-13 | Abc Trading Co Ltd | Architectural coupling member and coupling method |
JP2006300132A (en) * | 2005-04-18 | 2006-11-02 | Matsuba Seiko:Kk | Toggle pin |
JP4496124B2 (en) * | 2005-04-18 | 2010-07-07 | 有限会社マツバ精工 | Toggle pin mounting structure for fixing multiple pipes |
JP2012122490A (en) * | 2010-12-06 | 2012-06-28 | Takigen Mfg Co Ltd | Self-support type metal fitting for panel material |
KR200467495Y1 (en) * | 2011-08-24 | 2013-06-14 | 하연향 | Road―Sign―Board |
JP2015209948A (en) * | 2014-04-30 | 2015-11-24 | 元旦ビューティ工業株式会社 | Fitting member, and fitting structure using the same |
CN114270057A (en) * | 2019-06-27 | 2022-04-01 | 时尚箱包股份有限公司 | Releasable fastening device |
KR102333509B1 (en) * | 2021-05-11 | 2021-12-01 | 장혜지 | Installation method using T-PARA BOLT when installing a solar structure on an existing steel structure |
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