JP4281961B2 - Removably connecting a square pipe to a front T or L type - Google Patents

Removably connecting a square pipe to a front T or L type Download PDF

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JP4281961B2
JP4281961B2 JP2004289569A JP2004289569A JP4281961B2 JP 4281961 B2 JP4281961 B2 JP 4281961B2 JP 2004289569 A JP2004289569 A JP 2004289569A JP 2004289569 A JP2004289569 A JP 2004289569A JP 4281961 B2 JP4281961 B2 JP 4281961B2
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square pipe
bolt
joint
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JP2006105184A (en
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隆 内山
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株式会社内山商会
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Description

本発明は角パイプを平面L型またはT型に同形の継手を用いて接続する方法に関する。   The present invention relates to a method of connecting a square pipe to a plane L-type or a T-type using a joint of the same shape.

従来においても角パイプ等を例えばL型に接続するための継手ないしは接続部材として種々のものが知られているが、角パイプを簡単かつ自在に着脱可能に接続するものは知られていなかった。   Conventionally, various types of joints or connecting members for connecting a square pipe or the like to, for example, an L-shape are known, but those that connect a square pipe in a detachable manner easily and freely have not been known.

特開平7−208416公報Japanese Patent Laid-Open No. 7-208416 特開2002−57477公報JP 2002-57477 A 特開2003−247516公報JP 2003-247516 A

本発明の目的は角パイプを用いて棚枠等を組立て構築する際にボルト止めによって着脱自在に接続できる角パイプ相互を平面L型またはT型に同形の接続用継手を用いて接続する方法を提供することにある。   An object of the present invention is to provide a method of connecting square pipes that can be detachably connected by bolting when assembling and constructing a shelf frame or the like using square pipes to each other using a joint for connecting the same shape to a plane L type or T type. It is to provide.

正面T型またはL型の継手を用いて角パイプを正面T型またはL型にボルト・ナット手段で着脱可能に接続する方法において、上記の継手のT型またはL型に支出する接続手にねじ孔が正面より表裏に抜けているナットを夫々形成すると共に上記接続手に夫々被せ嵌合する角パイプの1側面に上記ねじ孔位置に合致する通し孔を設け、上記継手の各接続手に夫々角パイプを被せ嵌合した後、上記の全角パイプの通し孔を共通的に覆いかつ全通し孔の位置に夫々合致するボルト孔を有する共通接続板を正面に当てがい、上記のボルト孔および通し孔を経て夫々ボルトを各接続手のナットねじ孔にねじ込み、当該ボルト頭部とねじ孔に当該ボルトがねじ込まれたナットとの間で共通接続板を介して角パイプの当該1側面を締め付け固定することを特徴とする角パイプを正面T型またはL型に着脱可能に接続する方法に係わる。   In the method of detachably connecting a square pipe to a front T type or L type by means of bolts and nuts using a front T type or L type joint, a screw is attached to the connecting hand that spends on the T type or L type of the above joint. Nuts with holes extending from the front to the front and back are formed, and through holes that match the screw hole positions are provided on one side surface of the square pipe that fits over the connecting hands, and each connecting hand of the joint is provided with each of the connecting pipes. After covering and fitting the square pipe, a common connection plate that covers the through holes of the full-width pipes in common and has bolt holes that respectively match the positions of the full through-holes is applied to the front surface. Each bolt is screwed into the nut screw hole of each connecting hand through the hole, and the one side of the square pipe is fastened and fixed via a common connection plate between the bolt head and the nut in which the bolt is screwed into the screw hole. To do The square pipes to symptoms related to a method for detachably connecting the front T-type or L-type.

正面T型またはL型のアルミ製継手を用いてアルミ製角パイプを正面T型またはL型に鉄鋼製ボルト・ナット手段で着脱可能に接続する方法において、上記のアルミ継手のT型またはL型に支出する接続手にねじ孔が正面より表裏に抜けている鉄鋼製ナットを夫々嵌め込み固定すると共に上記接続手に夫々被せ嵌合する角パイプの1側面に上記ねじ孔位置に合致する通し孔を設け、上記継手の各接続手に夫々角パイプを被せ嵌合した後、上記の全角パイプの通し孔を共通的に覆いかつ全通し孔の位置に夫々合致するボルト孔を有するアルミ製共通接続板を正面に当てがい、上記のボルト孔および通し孔を経て夫々鉄鋼製ボルトを各接続手の鉄鋼ナットねじ孔にねじ込み、当該鉄鋼製ボルト頭部とねじ孔に当該ボルトがねじ込まれた鉄鋼製ナットとの間で共通接続板を介して角パイプの当該1側面を締め付け固定することを特徴とする角パイプを正面T型またはL型に着脱可能に接続する方法に係わる。   In the method of detachably connecting an aluminum square pipe to a front T type or L type by means of steel bolts and nuts using a front T type or L type aluminum joint, the above-mentioned aluminum joint T type or L type Insert and fix steel nuts with screw holes coming out from the front and back to the connecting hands that are spending on each side, and through holes that match the positions of the screw holes on one side of the square pipe that fits over the connecting hands. An aluminum common connection plate having bolt holes that cover and connect the through-holes of the full-width pipes in common and are respectively fitted to the joints of the joints after covering and fitting the square pipes to the joints of the joints. Is attached to the front, and the steel bolts are screwed into the steel nut screw holes of the connecting hands through the bolt holes and through holes, and the steel nuts with the bolts screwed into the steel bolt heads and screw holes. Relates to a method for detachably connecting square pipes, characterized in that the common connection plate via a clamping the first side of the square pipe is fixed to the front T-type or L-type with the.

また本発明は上記接続方法に使用される継手、角パイプおよび共通接続板に係わる。   The present invention also relates to a joint, a square pipe and a common connection plate used in the connection method.

本発明は、接続すべき角パイプの端面開口にブロック金具の接続角筒部(接続手)を嵌入し、該接続角筒部に嵌着したナットに、頭部を全接続角筒部のボルト・ナット結合部を共通的に覆う接続板を介して係合させたボルトをねじ込み、当該角パイプ壁面を継手面とボルト頭部との間に上記接続板を介装して締付け挟持して継手金具と角パイプを着脱自在に接続する方式であるので、接続操作が容易かつ迅速に行うことができ、かつ全接続角筒部の角パイプとのボルト・ナット結合が共通の接続板の適用によって相互位置が固定化されるので、ボルト・ナット結合の経時的緩み発生の防止を保証する。   According to the present invention, a connecting square tube portion (connecting hand) of a block metal fitting is inserted into an end face opening of a square pipe to be connected, and the head is bolted to a nut that is fitted to the connecting square tube portion. -Screw the bolts engaged through the connection plate that covers the nut joint in common, and tighten and clamp the square pipe wall surface with the connection plate between the joint surface and the bolt head. Since the bracket and the square pipe are detachably connected, the connection operation can be performed easily and quickly, and the connection of the bolts and nuts to the square pipes of all the connected square cylinders can be achieved by applying a common connection plate. Since the mutual position is fixed, it is ensured that the bolt-nut connection is prevented from loosening with time.

また、継手のブロック金具のナット嵌着部を除く全面に亘って複数の独立したくり抜き部を形成した複数画壁構造とすれば軽量でしかも継手としての強度にも優れ、これをアルミニウムないしはアルミニウム合金で製作した場合、その効果が顕著である。   In addition, if the multi-wall structure is formed with a plurality of independent hollow parts over the entire surface excluding the nut fitting part of the joint block metal fitting, it is lightweight and excellent in strength as a joint, and this is made of aluminum or aluminum alloy. The effect is remarkable when manufactured by.

またブロック金具をアルミ製とする場合、その正面形状を断面とする長尺アルミ型材を押出し成型し、これを所定の厚みに切断することで本発明の継手を安価かつ大量に生産することができ、ボルト・ナット手段を鉄鋼製とすることで、アルミブロック金具とアルミパイプの結合が強化される In addition, when the block metal fitting is made of aluminum, a long aluminum mold having a cross-section of the front shape is extruded and cut into a predetermined thickness, whereby the joint of the present invention can be produced at low cost and in large quantities. By making the bolt and nut means steel, the connection between the aluminum block fitting and the aluminum pipe is strengthened

以下に本発明の継手のブロック金具をアルミ製として、アルミ製の角パイプを相互に接続する方法について図面を用いて説明するが、本発明はこれのみに制約されるものではない。   Hereinafter, a method for connecting aluminum square pipes to each other using a block metal fitting of the joint of the present invention made of aluminum will be described with reference to the drawings. However, the present invention is not limited to this.

図1および図2は本発明に従って角パイプ相互を正面T型の継手および平面略二等辺三角形の接続板を用いてボルト・ナット結合して接続した状態を示す正面図および裏面図である。
正面T型のアルミニウム製継手(1)の三方の接続手(1−1)(1−2)(1−3)には夫々正面より表裏にねじ孔(2)が貫通するように鉄鋼製ナット(3)を夫々嵌め込み固定してある。(4)は継手(1)の軽量化のために設けた正面から表裏に抜ける空洞部である。また、継手(1)の各接続手(1−1)(1−2)(1−3)に夫々被せ嵌合する角パイプ(5−1)(5−2)(5−3)の1側面、図面では正面側面に上記ねじ孔(2)に合致する位置に夫々通し孔を設けてある。そこで上記継手の角接続手(1−1)(1−2)(1−3)に夫々角パイプ(5−1)(5−2)(5−3)をパイプ端面が継手(1)に衝合する位置まで被せ嵌合した後、上記の角パイプ(5−1)(5−2)(5−3)の通し孔を共通的に覆いかつ全通し孔の位置に夫々合致するボルト孔を有する平面略二等辺三角形のアルミ製共通接続板(6)を正面より当てがい、上記の接続板(6)のボルト孔および角パイプ(5−1)(5−2)(5−3)の各通し孔を経て夫々鉄鋼製のボルト(7)を各接続手(1−1)(1−2)(1−3)の鉄鋼製ナット(3)のねじ孔(2)にねじ込み、当該鉄鋼製ボルト(7)のボルト頭部(8)とねじ孔(2)にボルト(7)がねじ込まれた鉄鋼製ナット(3)との間で共通接続板(6)を介して各角パイプ(5−1)(5−2)(5−3)の当該1側面を締付け固定する。これにより角パイプ(5−1)(5−2)(5−3)は共通接続板(6)および継手(1)を介して着脱可能でしかも一体的かつ強固に接続連結される。
FIG. 1 and FIG. 2 are a front view and a back view showing a state in which square pipes are connected to each other by a bolt-nut connection using a front T-shaped joint and a plane isosceles triangular connecting plate according to the present invention.
Steel nuts so that the screw holes (2) pass through the front and back of the three-way connecting joints (1-1), (1-2), and (1-3) of the front T-shaped aluminum joint (1). (3) is fitted and fixed respectively. (4) is a hollow portion that is provided to reduce the weight of the joint (1) from the front to the front and back. Moreover, 1 of the square pipes (5-1), (5-2), and (5-3) that are fitted and fitted to the connecting hands (1-1), (1-2), and (1-3) of the joint (1), respectively. Through holes are provided in the side surface, in the drawing, at positions corresponding to the screw holes (2) on the front side surface. Therefore, the corner pipes (5-1), (5-2), and (5-3) are connected to the joints (1-1), (1-2), and (1-3) of the joint, and the pipe end faces are connected to the joint (1). Bolt holes which cover the through holes of the above-mentioned square pipes (5-1), (5-2) and (5-3) in common and match the positions of all the through holes after covering and fitting to the abutting positions. An aluminum common connection plate (6) having a substantially isosceles triangle shape is applied from the front, and bolt holes and square pipes (5-1), (5-2), and (5-3) of the connection plate (6) are applied. The steel bolts (7) are screwed into the screw holes (2) of the steel nuts (3) of the respective connecting hands (1-1) (1-2) (1-3) through the through holes of Between the bolt head (8) of the steel bolt (7) and the steel nut (3) in which the bolt (7) is screwed into the screw hole (2) via the common connection plate (6) Pipe (5-1) (5-2) (5-3) said first side to clamping of. Accordingly, the square pipes (5-1), (5-2), and (5-3) are detachable through the common connection plate (6) and the joint (1), and are connected and connected integrally and firmly.

図3は図1および図2において継手の正面形状を変えた例を示し、また継手および接続手と角パイプとの関係を判り易くするため締付けボルトを取付ける前の状態で示してある。
鉄鋼製ナット(3)はアルミ製の継手(1)の接続手(1−1)(1−2)(1−3)に夫々開けた孔(9)に嵌め込み固定されている。
また角パイプ(5−1)(5−2)(5−3)の嵌合端面は継手(1)の本体と各接続手(1−1)(1−2)(1−3)の境界の段部(10)に衝合され、この衝合状態で角パイプ(5−1)(5−2)(5−3)の1側面に開けた通し孔が継手(1)の各ナット(3)のねじ孔(2)の位置に合致するようになっている。
左右の接続手(1−2)(1−3)は角パイプ(5−2)(5−3)との接続強度をより保証するためより長く設定され、その余長部には継手(1)の軽量化のため空洞部(4′)を設けてある。
図4は上記におけるボルト(7)とナット(3)による角パイプ(5−1)(5−2)(5−3)と接続板(6)の締付け状態を説明するためのもので、ボルト(7)が接続板(6)のボルト孔(11)次いで角パイプ(5)の1側面の通し孔(12)を通りナット(3)のねじ孔(2)にねじ込まれる態様を示している。(13)および(14)はボルト頭部(8)と接続板(6)との間に締め付け介持されるスプリングワッシヤおよびワッシヤを示している。
FIG. 3 shows an example in which the front shape of the joint is changed in FIG. 1 and FIG. 2, and is shown in a state before the tightening bolt is attached in order to make the relation between the joint and the connecting hand and the square pipe easy to understand.
The steel nut (3) is fitted and fixed in the holes (9) opened in the connecting hands (1-1), (1-2) and (1-3) of the aluminum joint (1).
Further, the fitting end face of the square pipe (5-1) (5-2) (5-3) is the boundary between the main body of the joint (1) and each connecting hand (1-1) (1-2) (1-3). The through hole opened on one side of the square pipe (5-1) (5-2) (5-3) in this abutted state is in contact with each nut (10) of the joint (1). It matches the position of the screw hole (2) in 3).
The left and right connecting hands (1-2) and (1-3) are set longer in order to further ensure the connection strength with the square pipes (5-2) and (5-3). ) Is provided with a hollow portion (4 ').
FIG. 4 is a view for explaining a tightening state of the square pipes (5-1), (5-2), (5-3) and the connection plate (6) by the bolt (7) and the nut (3). (7) shows a mode of being screwed into the screw hole (2) of the nut (3) through the bolt hole (11) of the connecting plate (6) and then the through hole (12) on one side of the square pipe (5). . (13) and (14) show a spring washer and washer that are clamped between the bolt head (8) and the connecting plate (6).

図5は角パイプ相互を正面T型の継手および平面略直角三角形状の共通接続板を用いた例を示す。アルミ製継手(1)のL型に支出する接続手(1−1)(1−3)に開けた孔(9)に夫々ねじ孔(2)が正面より表裏に抜けている鉄鋼製ナット(3)を嵌め込み固定する。接続手(1−1)(1−3)に夫々被せ嵌合する角パイプ(5−1)(5−3)の1側面には上記ねじ孔(2)の位置に合致する通し孔を設けてある。
上記の継手(1)の全接続手(1−1)(1−3)に夫々角パイプ(5−1)(5−3)を被せ嵌合した後、全角パイプ(5−1)(5−3)の通し孔を共通的に覆いかつ全通し孔の位置に夫々合致するボルト孔を有する平面略直角三角形のアルミ製共通接続板(6)を当てがい、上記の接続板(6)のボルト孔および角パイプの通し孔を経て夫々鉄鋼製ボルトを各接続手(1−1)(1−3)の鉄鋼製ナット(3)のねじ孔(2)にねじ込み、該鉄鋼製ボルトの頭部とねじ孔(2)に当該ボルトがねじ込まれているナット(3)との間で共通接続板(6)を介して角パイプ(5−1)(5−3)の当該側面を締め付け固定し、角パイプ(5−1)(5−3)を着脱可能にL型に接続する。
FIG. 5 shows an example in which square pipes use a front T-shaped joint and a common connection plate having a substantially right-angled triangular shape. Steel nuts with screw holes (2) coming out from the front and back in the holes (9) opened in the connecting hands (1-1) and (1-3) spending on the L-shape of the aluminum joint (1) ( 3) Fit and fix. A through hole that matches the position of the screw hole (2) is provided on one side of each of the square pipes (5-1) and (5-3) that fit over the connecting hands (1-1) and (1-3). It is.
After fitting and fitting the square pipes (5-1) and (5-3) to the all joints (1-1) and (1-3) of the joint (1), the full-width pipes (5-1) and (5) -3) is applied in common to the aluminum common connection plate (6) having a substantially right-angled triangular plane that covers the through holes in common and has bolt holes that respectively match the positions of all the through holes. A steel bolt is screwed into the screw hole (2) of the steel nut (3) of each connecting hand (1-1) (1-3) through the bolt hole and the through hole of the square pipe, and the head of the steel bolt The side surfaces of the square pipes (5-1) and (5-3) are fastened and fixed via the common connection plate (6) between the bolt and the nut (3) in which the bolt is screwed into the screw hole (2). The square pipes (5-1) and (5-3) are detachably connected to the L shape.

実施例1の継手金具の使用態様を示す平面図The top view which shows the usage condition of the coupling metal fitting of Example 1. 同上の裏面図Back side view 実施例2の継手金具の使用態様を示す平面図The top view which shows the usage condition of the coupling metal fitting of Example 2. 同上の接続状態を示す断面的説明図Cross-sectional explanatory drawing showing the connection state 実施例3の継手金具の使用態様を示す平面図The top view which shows the usage condition of the coupling metal fitting of Example 3.

符号の説明Explanation of symbols

1……継手
1−1,1−2,1−3……接続手
2……ねじ孔
3……ナット
4……空洞部
4′……空洞部
5……角パイプ
5−1,5−2,5−3……角パイプ
6……共通接続板
7……ボルト
8……ボルト頭部
9……接続手にあけた孔
10……段部
11……接続板(6)のボルト孔
12……角パイプ(5)の通し孔
13……スプリングワッシヤ
14……ワッシヤ
DESCRIPTION OF SYMBOLS 1 ... Joint 1-1, 1-2, 1-3 ... Connection hand 2 ... Screw hole 3 ... Nut 4 ... Hollow part 4 '... Hollow part 5 ... Square pipe 5-1, 5- 2,5-3 ... Square pipe 6 ... Common connection plate 7 ... Bolt 8 ... Bolt head 9 ... Hole drilled in connecting hand 10 ... Step 11 ... Bolt hole in connection plate (6) 12 …… Through hole of square pipe (5) 13 …… Spring washer 14 …… Washer

Claims (6)

アルミ製角パイプを正面T型またはL型のアルミ製ブロック金具を継手に用いてこの継手と同形に正面T型またはL型に鉄鋼製のボルト・ナット手段で着脱可能に接続する方法において、上記のアルミ製ブロック金具継手のT型またはL型に支出する接続手にねじ孔が正面より表裏に抜けている鉄鋼製ナットをそれぞれ嵌め込み固定すると共に上記接続手にそれぞれ被せ嵌合するアルミ製角パイプの一側面に上記ねじ孔位置に合致する通し孔を設け、上記継手の各接続手にそれぞれ角パイプを被せ嵌合した後、上記の全角パイプの通し孔を共通的に覆いかつ全通し孔の位置にそれぞれ合致するボルト孔を有する平面略二等辺三角形または直角三角形状のアルミ製共通接続板を正面に当てがい、上記のボルト孔および通し孔を経てそれぞれ鉄鋼製ボルトを各接続手のナットねじ孔にねじ込み、当該ボルト頭部とねじ孔に当該ボルトがねじ込まれたナットとの間で共通接続板を介して角パイプの一側面を締め付け固定することを特徴とする角パイプを正面T型またはL型に着脱自在に接続する方法。 In a method of connecting an aluminum square pipe to a front T-type or L-type in the same shape as the front T-type or L-type aluminum block fittings using a steel bolt / nut means in a detachable manner, using the above-mentioned joints. An aluminum square pipe that fits and fixes steel nuts with threaded holes from the front and back to the connecting hands that spend on the T-type or L-type aluminum block fitting joints, and covers the connecting hands. A through hole that matches the position of the screw hole is provided on one side surface of the joint, and each connecting hand of the joint is fitted with a square pipe, and then the through hole of the full angle pipe is covered in common and purchase against a flat, substantially isosceles or right triangle of aluminum common connection plate having at positions matching the bolt holes in the front, respectively through the bolt holes and through-hole steel A bolt is screwed into a nut screw hole of each connecting hand, and one side surface of a square pipe is fastened and fixed via a common connection plate between the bolt head and a nut in which the bolt is screwed into the screw hole. A method for detachably connecting a square pipe to the front T-type or L-type. 継手の軽量化のためにその正面T型またはL型のアルミ製ブロック金具の各接続手基部に台形または方形の正面から表裏に抜ける空洞部を設けた請求項1記載の正面T型またはL型に着脱自在に接続する方法。   2. The front T-type or L-type according to claim 1, wherein each of the connecting bases of the front T-type or L-type aluminum block metal fitting is provided with a hollow portion extending from a trapezoidal or rectangular front to the front and back to reduce the weight of the joint. Removably connected to the camera. アルミ製ブロック金具の接続手先端部にも軽量化用の空洞部を設けた請求項1または2記載の正面T型またはL型に着脱自在に接続する方法。   3. A method of detachably connecting to a front T-type or L-type according to claim 1 or 2, wherein a hollow portion for weight reduction is also provided at the tip of the connecting hand of the aluminum block metal fitting. 請求項1から3のいずれか1項の接続する方法に使用される正面T型またはL型のアルミ製の軽量化ブロック金具継手。   A front T-shaped or L-shaped aluminum light-weight block metal fitting used in the connecting method according to any one of claims 1 to 3. 請求項1から3のいずれか1項の接続する方法に使用される1側面に通し孔を有するアルミ製角パイプ。   The aluminum square pipe which has a through-hole in one side surface used for the method of connecting in any one of Claim 1 to 3. 請求項1から3のいずれか1項の接続する方法に使用されるアルミ製共通接続板。   The aluminum common connection board used for the connection method of any one of Claim 1 to 3.
JP2004289569A 2004-10-01 2004-10-01 Removably connecting a square pipe to a front T or L type Active JP4281961B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2004289569A JP4281961B2 (en) 2004-10-01 2004-10-01 Removably connecting a square pipe to a front T or L type
CN 200510105710 CN1755149B (en) 2004-10-01 2005-09-27 Square tube connection method, joint used thereby and connection parts therewith
KR1020050091427A KR100910933B1 (en) 2004-10-01 2005-09-29 Connected assembly of aluminium square pipes with aluminium joints

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JP2004289569A JP4281961B2 (en) 2004-10-01 2004-10-01 Removably connecting a square pipe to a front T or L type

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JP4281961B2 true JP4281961B2 (en) 2009-06-17

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CN102031920B (en) * 2010-11-19 2013-01-09 湖南省金为型材有限公司 Square-tube inserting fitting, protecting window provided with same and manufacturing method thereof
CN102506032A (en) * 2011-10-13 2012-06-20 濮阳龙宇化工有限责任公司 Multifunctional regulating valve positioner connection plate
CN106089876A (en) * 2016-08-03 2016-11-09 南京创源天地动力科技有限公司 The connection assembly of rod member in a kind of battery fixing mechanism
EP3988802A1 (en) * 2017-11-30 2022-04-27 Corning Research & Development Corporation Rear sealing bracket and cabinet including rear sealing bracket
JP7424650B2 (en) * 2021-09-09 2024-01-30 ヒロホー株式会社 Square pipe joint structure and transport container using it

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FR2185115A5 (en) * 1972-05-17 1973-12-28 Curti Lucien
US4368998A (en) * 1981-03-18 1983-01-18 Corners, Ltd. Tube assembling device
SE439521B (en) * 1983-09-30 1985-06-17 Eriksson Lars RAM, PREFERRED TO A TRANSPORT Wagon
US4770560A (en) * 1987-05-29 1988-09-13 Ott Donald E Self-tapping connector
DE10020196A1 (en) * 2000-04-25 2001-10-31 Josef Katz Einrichtungshaus Gm Connector for joining square section hollow profiles comprises cube whose faces are of same size as cross-sections of profiles and which has conical recess leading to threaded bore in each face
FR2814207B1 (en) * 2000-09-18 2005-10-28 Maurice Agostini MODULAR DEVICE FOR ASSEMBLING MECHANICAL ELEMENTS FIXED ON A FULL OR HOLLOW TUBULAR SUPPORT
CN2480604Y (en) * 2001-06-27 2002-03-06 张旭 Quick assembling pipe joint

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CN1755149A (en) 2006-04-05
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