JP2003328556A - Pipe connecting tool for scaffold - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe connecting tool for a scaffold for eliminating the possibility that a connecting part slips out of a scaffold pipe even if engagement of a slipping-out preventive part with an outside surface of the scaffold pipe is released. <P>SOLUTION: This connecting tool 11 has the connecting part 15 extending in a straight line shape to one end side. The slipping-out preventive part 17 extending in a circular arc shape is formed on the base end of the connecting part 15 via an extension part 16. A locking piece 18 is rotatably supported in a tip part of the connecting part 15. The scaffold pipes 12 are mutually connected when engaging the slipping-out preventive part 17 with an outer peripheral surface of the scaffold pipes 12 by inserting the connecting part 15 into a connecting part 14 of the scaffold pipes 12. Since both end parts of the locking piece 18 are locked on the outer peripheral surface of the scaffold pipes 12 even if engagement of the slipping-out preventive part 17 with the outer peripheral surface of the scaffold pipes 12 is released, slipping-out of the connecting tool 11 from the connecting part 14 is regulated, so that the connection of the scaffold pipes 12 is maintained. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffolding pipe connector used for connecting an upper scaffolding pipe and a lower scaffolding pipe when assembling a frame scaffolding or one-sided scaffolding. is there.

[0002]

2. Description of the Related Art As a conventional scaffolding pipe connector,
The pipe connector disclosed in Utility Model Registration No. 2529490 is known. This pipe connector is made of a metal round bar and has a connecting part that is inserted into the holes of the inner pipe and the outer pipe as a scaffolding pipe, a retaining part that is joined to the outer surface of the outer pipe, and the retaining part and the retaining part. And an intermediate section provided between the section and the section.

When the inner pipe and the outer pipe are connected using the pipe connecting device constructed as described above, first, the inner pipe is inserted into the outer pipe and the holes of the inner pipe are aligned with the holes of the outer pipe. . Next, the connecting portion is inserted into each hole with the retaining portion positioned on the side of the connecting portion. Next, when the pipe connecting tool is rotated downward around the connecting portion and the retaining portion is rotated downward, the retaining portion is joined to the outer surface of the outer pipe. As a result, the pipes are connected to each other by the connecting portion, and the connecting portion is prevented from coming off due to the engagement between the distal end portion of the retaining portion and the outer pipe.

[0004]

However, when the inner pipe and the outer pipe connected by using the above-mentioned conventional pipe connecting tool are slanted up by a crane or the like, the retaining portion is connected to the retaining portion due to its own weight. The pipe connector is rotated relative to each pipe so that it is located below. Then, the engagement of the retaining portion with the outer surface of the outer pipe is released, and in this disengaged state, there is a problem that the connecting portion may slip out of the hole of the pipe.

The present invention has been made by paying attention to the problems existing in the above prior art. It is an object of the invention to provide a scaffolding pipe connector capable of eliminating the risk of the coupling part coming out of the scaffolding pipe even if the engagement of the retaining portion with the outer surface of the scaffolding pipe is released.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 penetrates through holes formed in opposing peripheral walls of a connecting portion where scaffolding pipes overlap each other. With a connecting portion to be inserted, extending from the extended portion bent at the base end of the connecting portion to the distal end side of the connecting portion so as to form an arc along the outer peripheral surface of the scaffolding pipe,
The scaffolding pipe is provided with a retaining portion that restricts the connecting portion from coming out of the connecting portion in an attached state in which the connecting portion is engaged, and the tip of the connecting portion extends in a direction intersecting the extending direction of the connecting portion. The gist of the present invention is that a locking portion that can be locked is formed on the outer surface of the connecting portion, and that the locking portion is locked to the outer surface of the connecting portion to prevent the connecting portion from coming out of the connecting portion.

According to a second aspect of the present invention, in the scaffolding pipe connector according to the first aspect, the engaging portion is formed of an engaging piece supported by a support shaft at a tip end portion of the connecting portion. In the inserted state in which the retaining portion is positioned on the lateral side of the connecting portion to insert the connecting portion into the hole, the support shaft supports the locking piece in the vertically extending state and supports the connecting portion in the attached state. Then, the gist is that the support shaft supports the locking piece in the connecting portion in a state of extending in the lateral direction.

According to a third aspect of the present invention, in the scaffolding pipe connector according to the second aspect, a narrow groove-like slit is formed at the tip of the connecting portion,
The locking piece is supported by a support shaft in a state where the base end portion of the locking piece is inserted into the slit, the slit extends laterally in the inserted state, and the slit vertically in the attached state. The gist is that it is formed so as to extend.

According to a fourth aspect of the present invention, in the scaffolding pipe connector according to the second or third aspect, the locking piece has a long plate shape and is formed along the length direction thereof. The gist is that the support shaft is inserted into the formed long hole.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a scaffolding pipe connector embodying the present invention will be described below with reference to FIGS.

As shown in FIG. 1, a scaffolding pipe connector 11 (hereinafter simply referred to as a connector 11) is used for connecting a scaffolding pipe 12 with a lower end of another scaffolding pipe 12 to an upper end thereof. Is what is used. The scaffolding pipe 12
Each of them is formed of a metal material into a substantially cylindrical shape. As shown by a broken line in FIG. 1, a fitting pipe portion 12a that can be internally fitted to the lower end side of another scaffolding pipe 12 is provided at the upper end portion of the scaffolding pipe 12. Has been formed.

Further, as shown in FIGS. 2 and 3 (a),
A through hole 12b is provided at a position opposite to each other on the peripheral wall of the fitting / inserting cylinder portion 12a.
Is formed so as to penetrate the peripheral wall of the fitting and inserting cylinder portion 12a. Through holes 13 are formed through the peripheral wall at opposite positions of the peripheral wall on the lower end side of the scaffolding pipe 12. When the fitting insertion tube portion 12a of the scaffolding pipe 12 is fitted and inserted into the lower end side of another scaffolding pipe 12, the connecting portion 14 is formed at a position where the scaffolding pipes 12 overlap each other. In the connecting portion 14, the through hole 12b and the through hole 13 are aligned with each other, and the through hole 12b and the through hole 13 are formed on the peripheral walls of the connecting portion 14 facing each other.

Next, the connector 11 will be described in detail. As shown in FIG. 1, the connector 11 is formed by bending a metal round bar material. The connecting tool 11 includes a connecting portion 15 that linearly extends on one end side, and the connecting portion 15
An extending portion 16 extending orthogonally to the connecting portion 15 is formed at the base end portion of the. In addition, the extension portion 16 is formed with the connecting portion 15 and a retaining portion 17 that extends in an arc shape from the extension portion 16 toward the distal end side of the connecting portion 15 as much as possible. The connecting portion 15 includes the through hole 12b and the through hole 1.
3, the connecting portion 15 penetrates the connecting portion 14, and the extending portion 16 is in contact with the outer surface of the scaffolding pipe 12, the distal end portion of the connecting portion 15 protruding from the through hole 12b. It is set to the length.

As shown in FIGS. 2 and 3A, the tip of the connecting portion 15 extends linearly along the diameter of the connecting portion 15 and along the extending direction of the extending portion 16. A slit 15a having a narrow groove shape is formed. A base end portion of a locking piece 18 serving as a locking portion having an elongated rectangular plate shape is provided in the slit 15a.
Is supported by the support shaft 19 at the tip of the connecting portion 15.

The engaging piece 18 is formed so that its length in the short side direction is slightly smaller than the diameter of the connecting portion 15. As shown by the broken line in FIG.
An elongated hole 18a extending from the central portion of the to the proximal end side of the locking piece 18 is formed, and the support shaft 19 is inserted into the elongated hole 18a. Further, as shown in FIG. 4, a notch 18b that is inclined obliquely is formed at one corner of the locking piece 18 on the base end side. The cutout portion 18b is formed so as to incline upward when the locking piece 18 is disposed at a position where the long side direction extends along the axial direction of the connecting portion 15. . That is, the distance from the inclined edge of the cutout portion 18b to the support shaft 19 is formed shorter than the distance from the inner bottom surface of the slit 15a to the support shaft 19.

On the other hand, at the base end portion of the locking piece 18, a contact portion 18c is formed at another position of the cutout portion 18b, and the contact portion 18c connects the locking piece 18 in the long side direction. It is formed so as to extend in the vertical direction when it is arranged at a position extending along the axial direction of the portion 15. The distance from the contact portion 18c to the support shaft 19 is slightly shorter than the distance from the inner bottom surface of the slit 15a to the support shaft 19.

As shown in FIGS. 3 (a) and 3 (b), the extending portion 16 extends laterally from the connecting portion 15 and the connecting tool 11 is placed so that the retaining portion 17 is located on the lateral side of the connecting portion 15. The slits 15a are formed so as to extend in the lateral direction when arranged (hereinafter, referred to as the insertion state of the connector 11). Further, as shown by broken lines in FIGS. 3A and 3B, when the connecting tool 11 is inserted, the support shaft 19 supports the locking piece 18 on the connecting portion 15 while extending in the vertical direction. .

On the other hand, as shown in FIG. 4, an extending portion 16 extends vertically from the connecting portion 15, and a retaining portion 17 is located below the connecting portion 15 and engages with the outer surface of the scaffolding pipe 12. The state in which the connecting tool 11 is arranged in this manner is the attached state of the connecting tool 11. The slit 15a is formed to extend in the vertical direction when the connecting tool 11 is attached. Further, the support shaft 19 extends laterally and the locking piece 1
8 is supported by the connecting portion 15.

As shown in FIGS. 3 (a) and 3 (b), when the connecting tool 11 is arranged in the inserted state, the locking piece 18 is inserted so that the long side direction extends along the axial direction of the connecting portion 15. When the locking piece 18 is disposed in the position, the insertion position is maintained without rotating the locking piece 18 downward. On the other hand, as shown in FIG. 6A, when the connecting piece 11 is arranged in the attached state, when the locking piece 18 is moved downward, the long side direction of the locking piece 18 is the axis line of the connecting portion 15. It is arranged at a locking position extending in a direction intersecting the direction.

As shown in FIG. 3B, the extension portion 16
The length along the axis of the scaffold is slightly longer than the radius of the scaffolding pipe 12. As shown in FIG. 2, the retaining portion 17 is formed in an arc shape so as to extend along substantially the half of the outer circumference of the scaffolding pipe 12.

In order to connect the scaffolding pipes 12 to each other by using the connecting tool 11, first, the scaffolding pipe 12 is connected.
Connect each other. Next, as shown in FIGS. 3A and 3B, after rotating the locking piece 18 and arranging it at the insertion position, the connector 11 is arranged in the insertion state, and the locking piece 18 and the connection piece are connected. The portion 15 is inserted into the through hole 12b and the through hole 13. At this time, since the extending portion 16 has a length that is at least half the thickness of the scaffolding pipe 12, the connecting portion 15 does not interfere with the retaining portion 17 and the scaffolding pipe 12, and the connecting portion 15 has the through hole 12 b and the through hole 1.
3 is inserted.

The slit 15a extends laterally, that is, in the horizontal direction, and the support shaft 19 extends vertically. In addition, the contact portion 18c of the locking piece 18 contacts the inner bottom surface of the slit 15a, and the rotation of the locking piece 18 is restricted. Therefore, the locking piece 18 does not rotate downward and the locking piece 1
8 and the connecting portion 15 pass through the through hole 12b and the through hole 13 in a substantially straight line state.

Next, the retaining portion 17 at the position shown by the chain double-dashed line in FIG.
The connector 11 is rotated so that the side faces downward, and the connector 11 is displaced from the inserted state to the attached state. Then, as shown in FIG. 2, the inner peripheral surface of the retaining portion 17 has the scaffolding pipe 1
As shown in FIG. 4, the slits 15a are arranged so as to extend in the up-down direction at the same time as they are engaged along the outer peripheral surface of 2.

At this time, the locking piece 18 tries to rotate downward due to its own weight, but since the contact portion 18c of the locking piece 18 contacts the inner bottom surface of the slit 15a, the locking piece 18 cannot rotate. It is regulated. Then, as indicated by the chain double-dashed line in FIG. 5, when the tip end side of the locking piece 18 is pushed up by hand, a part of the contact portion 18c of the locking piece 18 rotates while slidingly contacting the inner bottom surface of the slit 15a. To be done. Further, when the locking piece 18 is rotated upward, the rotation is allowed without the locking piece 18 coming into contact with the inner bottom surface of the slit 15a by the cutout portion 18b.

Then, as shown by the solid line in FIG.
When the locking piece 18 is rotated so that 8a extends in the vertical direction and then the hand is released, the locking piece 18 moves downward by its own weight by the length of the elongated hole 18a. As a result, FIG.
As shown in (a), the locking piece 18 is arranged at the locking position. At this time, since the engaging piece 18 is supported by the support shaft 19 substantially in the center thereof, the engaging pieces 18 protruding in the vertical direction from the outer surface of the distal end of the connecting portion 15 have substantially the same length. Therefore, both ends of the locking piece 18 are formed in the through holes 12b.
It is arranged at a position where it can be locked to the outer surface of the scaffolding pipe 12 on the outer peripheral side.

Then, the scaffolding pipes 12 are connected to each other by the connecting portion 15 with the connecting tool 11 attached. In addition, when a force that moves the connecting tool 11 in the direction opposite to the insertion direction of the connecting portion 15 into the through hole 12b and the through hole 13 acts on the connecting tool 11, the retaining portion 17 causes the retaining portion 17 to move.
2 engages with the outer peripheral surface, and the upper and lower ends of the locking piece 18 are through holes 12
It is locked to the outer peripheral surface of the scaffolding pipe 12 on the outer peripheral side from b. Therefore, the connecting tool 11 is prevented from coming out of the connecting portion 14, and the connection between the scaffolding pipes 12 is maintained.

As shown by the chain double-dashed line in FIG. 6 (b), the connected scaffolding pipes 12 are slanted and slanted, and the scaffolding pipe 12 is connected with the connecting portion 15 as a rotation center. It rotates relative to 11, and the retaining portion 17
It is assumed that the engagement with the outer peripheral surface of the scaffolding pipe 12 is released.

At this time, since the retaining portion 17 is positioned below the connecting portion 15 due to its own weight, the slit 15a is maintained in a state in which it extends substantially vertically. Therefore, the locking piece 1
8 does not rotate and is maintained in the state in which it is arranged at the locking position, and the locking of the locking piece 18 with respect to the outer peripheral surface of the scaffolding pipe 12 is not released. Therefore, the connecting portion 15 is prevented from coming out of the through hole 12b and the through hole 13, and the coming out of the connecting portion 14 of the connecting tool 11 is restricted.

According to the connector 11 of the above embodiment, the following features can be obtained. (1) Even if the scaffolding pipe 12 is inclined and the engagement of the retaining portion 17 with the outer peripheral surface of the scaffolding pipe 12 is released, the locking piece 18 is arranged at a position where it can be locked with the outer peripheral surface of the scaffolding pipe 12. Can be made. Therefore, it is possible to prevent the connecting portion 15 from coming off from the connecting portion 14, and it is possible to maintain the connection between the scaffolding pipes 12.

(2) Even when the scaffolding pipe 12 is erected so as to extend in the vertical direction, the locking pieces 18 are locked to the outer peripheral surfaces of both ends, and the retaining portions 17 are formed on the outer peripheral surface of the scaffolding pipe 12. With the engagement with, it is possible to effectively prevent the connecting tool 11 from coming out of the connecting portion 14.

(3) When the locking piece 18 is disposed at the insertion position, the contact of the contact portion 18c with the inner bottom surface of the slit 15a can restrict the rotation of the locking piece 18, and the connection can be achieved. Fitting insertion tube portion 12a of the portion 15 and the locking piece 18 and the through hole 13
It is possible to easily perform the insertion work into.

(4) The locking piece 18 is formed by the cutout portion 18b.
It is possible to eliminate the inconvenience that it becomes difficult to rotate upward from the insertion position of. (5) When the connector 11 is arranged in the inserted state, the slit 15a extends in the lateral direction and the support shaft 19 supports the locking piece 18 in a state of extending in the vertical direction. Therefore, the downward rotation of the slit 15a can be regulated, and the connecting portion 15 and the locking piece 18 can be easily inserted. On the other hand, when the connector 11 is arranged in the attached state, the slit 15a extends in the vertical direction and the support shaft 19 supports the locking piece 18 in a state of extending in the horizontal direction. Therefore, the locking piece 18 can be easily moved downward, and the connecting work of the scaffolding pipes 12 with the connecting tool 11 can be simplified.

(6) Since the slit 15a is formed in the shape of a narrow groove and the locking piece 18 is formed in a flat plate shape, when the connecting piece 11 is inserted and the locking piece 18 is at the insertion position, the locking piece 18 is locked. The contact area between the outer surface of the locking piece 18 and the inner surface of the slit 15a can be increased as compared with the case where the piece 18 is formed of a bar or the like. Therefore, it is possible to effectively regulate the rotation of the locking piece 18 in the slit 15a and easily insert the connecting portion 15 and the locking piece 18 into the through hole 12b and the through hole 13.

(7) When the locking piece 18 is in the locking position due to the elongated hole 18a, both ends of the locking piece 18 are at the scaffolding pipe 1.
2 can be locked to the outer surface. Therefore, as compared with the case where only one end of the locking piece 18 is locked to the outer peripheral surface of the scaffolding pipe 12, the connecting portion 15 can be effectively prevented from coming out of the through hole 12b and the through hole 13. it can.

The above embodiment may be modified as follows. In the embodiment, the length of the slit 15a is set so that the contact portion 18c of the locking piece 18 and the inner bottom surface of the slit 15a come into contact with each other when the coupling tool 11 is inserted. The contact portion 1 extends to the back of 15
You may form so that 8c may not contact.

In the embodiment, the notch 18b is formed on the inclined surface, but it may be formed in a gentle arc shape. In the embodiment, the locking piece 18 is formed in a flat plate shape,
It may be changed to a round bar shape, an elongated plate shape, a square pole shape, or the like.

In the embodiment, the slit 15a is formed to extend in the vertical direction when the connecting tool 11 is in the attached state, but the slit 15a may be formed to extend in the oblique direction in the attached state. At this time, the connecting portion 1
After inserting 5 through the through hole 12b and the through hole 13, the locking piece 18 is manually rotated.

In the embodiment, the support shaft 1 is provided in the long hole 18a.
9 was inserted to support the locking piece 18, but the elongated hole 18a was omitted, and for example, a circular hole was formed in the central portion or one side of the locking piece 18, and the support shaft 19 was inserted into the circular hole. Alternatively, the locking piece 18 may be supported.

In the embodiment, the locking piece 18 is inserted through the slit 15a and attached. However, the slit 15a is omitted and the locking piece 18 is rotatably supported on the outer surface of the distal end portion of the connecting portion 15. Good.

In the embodiment, the locking piece 18 is inserted into the slit 15a, but it may be changed as follows.
A locking rod in the shape of a rod that is movable along the axis of the connecting portion 15 is attached and supported at the tip of the connecting portion 15. A long hole 18a is formed along the axis of the locking rod, and a support shaft 19 is inserted through the long hole 18a.
This prevents the connecting portion 15 from slipping out.

The locking rod is formed by joining a part of the edges of a pair of round rods, and the joined portion functions as a hinge portion. Then, the locking rod is formed in a linear shape, and the connecting portion 15
After inserting the connecting portion 15 and the locking rod into the through hole 12b and the through hole 13 in a state of extending along the axis of (the insertion position), the connecting tool 11 is rotated and the locking rod is bent from the hinge portion. (Locking position). As a result, the locking rod is locked to the outer peripheral surface of the scaffolding pipe 12.

In the embodiment, the retaining portion 17 is formed to have a length that surrounds at least half of the outer circumference of the scaffolding pipe 12, but may have a length that surrounds at least one fourth of the outer circumference of the scaffolding pipe 12. .

In the embodiment, the length of the extension 16 along the axis is slightly longer than the radius of the scaffolding pipe 12, but it may be longer than that of the embodiment. In the embodiment, the locking piece 18 is used as the locking portion and the connecting portion 1 is used.
Although the locking piece 18 is omitted, the locking piece 18 is omitted, and a bendable locking portion extending along the axis of the coupling portion 15 is integrally formed at the tip of the coupling portion 15. For example, a locking rod-shaped engaging portion is formed at the tip of the connecting portion 15. Then, after inserting the connecting portion 15 and the locking portion into the through hole 12b and the through hole 13 of the connecting portion 14, the locking portion may be bent and locked to the outer surface of the scaffolding pipe 12.

Next, the technical ideas that can be understood from the above-described embodiments and other examples will be added below along with their effects. (1) The scaffolding pipe according to claim 3 or 4, wherein, in the inserted state, a contact portion that contacts the inner bottom surface of the slit is formed at the base end portion of the locking piece. Connector. With this structure, the rotation of the locking piece can be regulated by the contact between the contact portion of the locking piece and the inner bottom surface of the slit, and the connecting portion and the locking piece can be inserted into the hole. Can be done easily.

(2) When the locking piece is displaced from the inserted state to the attached state and the locking piece is moved to lock the locking piece on the outer surface of the connecting portion, the base edge of the locking piece and the slit The cutout portion for avoiding contact with the inner bottom surface is formed at the base end portion of the locking piece, any one of claims 3 and 4 and the technical idea (1). The scaffolding pipe connector according to claim 1. With this structure, the locking piece can be smoothly rotated.

[0046]

As described above in detail, according to the invention as set forth in claim 1, even if the engagement of the retaining portion with the outer surface of the scaffolding pipe is released, the connecting portion may be pulled out of the scaffolding pipe. It can be lost.

According to the invention described in claim 2, claim 1
In addition to the effects of the invention described in (1), when the locking piece and the connecting portion are inserted into the holes of the connecting portion, downward rotation of the locking piece can be restricted, and the connecting portion and the locking piece The insertion work can be easily performed. Further, when the retaining portion is engaged with the outer peripheral surface of the scaffolding pipe, the locking piece can be easily displaced in the vertical direction, and the work of connecting the scaffolding pipes can be simplified.

According to the invention of claim 3, claim 2
In addition to the effect of the invention described in (1), when the connecting portion is inserted into the hole, the outer surface of the locking piece comes into contact with the inner surface of the slit, and the downward rotation of the locking piece can be restricted. Further, when the retaining portion is engaged with the outer surface of the connection portion of the scaffolding pipe, the locking piece can be easily moved downward.

According to the invention of claim 4, claim 2
Alternatively, in addition to the effect of the invention described in claim 3, since the position where the locking piece is supported by the support shaft can be changed by the long hole, both ends of the locking piece can be locked to the outer surface of the connection portion. Can be

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which scaffolding pipes are connected by a connecting tool.

FIG. 2 is a view of the scaffolding pipe connected to FIG.
2 line sectional drawing.

FIG. 3 (a) is a partially cutaway side view showing a state in which a connecting portion and a locking piece are inserted through a through hole and a through hole, and FIG. 3 (b) is a connecting portion and a locking piece inserted through a through hole and a through hole. The partial front view which shows a state.

FIG. 4 is a partial cross-sectional side view showing a state in which the contact portion is in contact with the inner bottom surface of the slit.

FIG. 5 is a partial side view showing a state in which the locking piece is rotated upward from the insertion position.

FIG. 6A is a partial side view showing a state in which the retaining portion is engaged with the outer peripheral surface of the scaffolding pipe, and FIG. 6B is a state in which the retaining portion is engaged with the outer peripheral surface of the scaffolding pipe. Partial front view.

[Explanation of symbols]

11 ... Scaffolding pipe connector, 12 ... Scaffolding pipe, 1
2b ... Through hole as hole, 13 ... Through hole as hole, 14
... connecting part, 15 ... connecting part, 15a ... slit, 16 ... extension part, 17 ... retaining part, 18 ... locking piece as locking part, 1
8a ... elongated hole, 19 ... support shaft.

Claims (4)

[Claims] A scaffolding pipe is provided with a connecting portion inserted through holes formed in opposing peripheral walls of a connecting portion where the pipes are overlapped with each other, and an extending portion formed by bending at a base end portion of the connecting portion. Extending from the installation part to the tip side of the connecting part so as to form an arc along the outer peripheral surface of the scaffolding pipe, and preventing the connecting part from coming out of the connecting part in the attached state that engages with the outer peripheral surface of the scaffolding pipe And a locking portion that extends in a direction intersecting the extending direction of the coupling portion and that can be locked to the outer surface of the connection portion is formed at the tip of the coupling portion. A connector for a scaffolding pipe, characterized in that the connector is prevented from coming out of the connecting portion by being locked to the outer surface. 2. The locking portion is formed of a locking piece supported by a support shaft at a tip portion of the connecting portion, and the retaining portion is positioned on a side of the connecting portion to insert the connecting portion into the hole. In the inserted state, the support shaft supports the locking piece on the connecting portion while extending in the vertical direction, and in the attached state, the supporting shaft supports the locking piece on the connecting portion while extending in the lateral direction. The scaffolding pipe connector according to claim 1, wherein: 3. A slit having a narrow groove shape is formed at the tip of the connecting portion, and the locking piece is supported in a state where the base end of the locking piece is inserted into the slit. The scaffolding pipe connector according to claim 2, wherein the scaffold pipe is supported by a shaft, and the slit is formed to extend laterally in the inserted state and to extend vertically in the attached state. . 4. The locking piece has a long plate shape, and the support shaft is inserted into a long hole formed along a length direction of the locking piece. The scaffolding pipe connector described in.