JPH06299695A - Connecting pipe for scaffold frame - Google Patents

Abstract

PURPOSE:To facilitate connection and disconnection even to and from agalvanized scaffold frame with a vent hole. CONSTITUTION:By axially installing a fitting main body 22 having an engagement pin 14 projected from an upper part through hole 15 of a connecting pipe 11 and an L letter shaped arm 24 having an engagement hook 16 projected from a lower part through hole 17, a fitting 20 for engagement is constituted. The fitting 20 for engagement is built in the connecting pipe 11 and pressed by a spring body 26 from the back. The engagement pin 14 is made free to rise and set from and in the upper part through hole 15 by vertical motion of an operation lever 18 projected from a collar body 13 of the connecting pipe 11, and the engagement hook 16 is made free to rise and set from and in the lower part through hole 17 by operation of an upper end part of the L letter shaped arm 24 faced to an upper part opening of the connecting pipe 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold frame connecting pipe for vertically connecting scaffold frames used for temporary scaffolding for construction work.

[0002]

2. Description of the Related Art In the construction work of a building, temporary scaffolds are formed by stacking scaffolding frames near the building in multiple steps according to the height of the building. For stacking this scaffolding frame, insert a connecting pipe configured by fitting and fixing a collar body of the same diameter as the building pipe diameter of the scaffolding frame to the outer periphery of the central portion of the pipe body of an appropriate length in the upper and lower scaffolding frames. It is connected.

As shown in FIG. 10, the connecting pipe 1 for scaffolding frame is prepared by inserting the lower part of the connecting pipe 1 into the upper end of the building 3 of the scaffolding frame 2 in advance to prevent the connecting pipe 1 from coming off. The lower end of the building 3 of the scaffolding frame 2 which is to be assembled upward is simply inserted into the upper part of the structure to be assembled sequentially.

Recently, as shown in the connecting pipe 1'in FIG. 11 disclosed in Japanese Patent Laid-Open No. 5-1469, attachment to the upper end of the building 3 and attachment / detachment to the lower end of the building 3 can be done with one touch. It has been proposed that the connecting pipe 1 is provided with a mounting projection 4 and a mounting projection 5 for detachment by means of substantially U-shaped leaf springs 6 and 7 so that the connecting pipe 1 can be retracted.

[0005]

However, the mounting projection 4 of the connecting pipe 1'is urged by the substantially U-shaped leaf spring 6 so as to project outward, and the upper end portion of the building 3 is provided. It is designed to be attached with one touch, but as shown in FIG. 12, the galvanized scaffolding frame 2 is provided with a gas vent hole 8 at the time of plating at the junction of the horizontal land 9 of the building 3. Therefore, when inserting the connecting pipe 1 ′ into the upper end of the building 3, the mounting projection 4 may fit into the gas vent hole 8 before reaching the regular engagement hole 10. Once the mounting projection 4 fits into the gas vent hole 8, there is no way to retract the projection with this structure that is simply biased by a leaf spring, so there is a risk that the connecting pipe 1'cannot be inserted or removed. Occurs. Therefore, at the time of attaching the connecting pipe to the galvanized scaffolding frame, it is sometimes necessary to insert the connecting pipe 1 ′ while rotating so as to avoid the gas vent hole 8, which requires extra care and is troublesome for the operator. It was a thing.

In view of the above points, the present invention devises a mechanism of a projection for attaching and detaching a connecting pipe, and provides a connecting pipe for a scaffolding frame which can be easily attached to and detached from a scaffolding frame having a gas vent hole. The purpose is to

[0007]

In order to achieve the above-mentioned object, the present invention connects the upper and lower building frames of a temporary scaffold by fitting a collar body as a stepped portion near the center of the short pipe. In a scaffolding frame connecting pipe, a vertically elongated metal fitting main body having a locking pin protruding at an upper end and an L-shaped arm having a locking hook formed by bending a lower end into a substantially L-shape are arranged in a longitudinal direction. Overlap the locking pin and the locking hook in the same direction to make
The locking metal fitting is configured by axially attaching the vicinity of the center of the L-shaped arm, and the locking metal fitting is inserted into the short pipe of the connecting pipe to open the upper end of the L-shaped arm at the upper opening of the short pipe. On the other hand, the locking pin can be inserted into and removed from the upper through hole formed on the side of the short pipe above the collar body, and the locking hook can be inserted into and removed from the lower through hole formed on the side face of the short pipe below the collar body. The operation lever is inserted into the collar body opening that is opened in the collar body from the inside of the short pipe toward the outside while the rear end of the operation lever is brought into contact with the front surface of the metal fitting main body above the shaft attachment portion. The main body of the metal fitting can be swung back and forth, and a spring body for urging the locking hook to project outward from the lower through hole is provided on the rear surface of the L-shaped arm below the shaft attachment portion. It was done.

[0008]

According to the scaffolding frame connecting pipe of the present invention, when the connecting pipe is attached to the scaffolding frame, a fingertip is used to pinch the peripheral edge of the upper opening of the connecting pipe and the upper end of the L-shaped arm facing the upper opening. When the upper end of the L-shaped arm is moved in the protruding direction of the locking hook in such a way that the L-shaped arm pivots around the shaft mounting portion mainly of the metal fitting, the L-shaped arm projects to the side of the single pipe of the connecting pipe. It becomes to sink from the side of the single pipe. When the lower part of the connecting pipe is inserted into the ground end of the scaffolding frame by pinching the upper end of the connecting pipe in this way, the locking hooks will remain even if the vent holes are in the middle like the zinc-plated scaffolding frame. Since the hole does not fit into the hole, the connecting pipe can be easily attached.

Even if the locking hook fits into the gas vent hole, the upper end of the connecting pipe is pinched as described above and the upper end of the L-shaped arm is moved in the protruding direction of the locking hook to easily lock. The hook can be removed from the degassing hole, and the connecting pipe can be attached at a proper position.

Further, when assembling another scaffolding frame on the upper side of the scaffolding frame to which the connecting pipe is attached, when the lower end of the building of the upper scaffolding frame is inserted into the upper part of the connecting pipe, the locking is fixed mainly to the metal fittings. When the pin is retracted and the lower end of the building is further inserted into the connecting pipe, the locking pin comes into contact with the engaging hole provided at the lower end of the building, and the locking pin fits into the engaging hole. Penetrate to complete engagement of upper scaffolding frame.

When removing the upper scaffolding frame, the operation lever protruding from the opening of the collar body is stepped on with a foot or the like to push down the operation lever, and the rear end of the operation lever located inside the connecting pipe is a metal fitting. As the main body is pressed, the main body of the metal fitting is pushed back in the direction opposite to the protruding direction of the locking pin centering on the lower end contacting the inner circumference of the single pipe of the connecting pipe, so The stop pin is sunk from the side surface of the single pipe of the connecting pipe and disengaged from the engaging hole of the building, so that the upper scaffolding frame can be easily removed.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a connecting pipe of the present invention. In the connecting pipe 11, a collar body 13 as a stepped portion is fitted and fixed in the vicinity of the center of a short pipe 12 having a predetermined length. Short tube 1
The upper through hole 15 is formed on the upper side surface of the collar body 13 of No. 2 and the locking pin 14 for locking the building 3 of the scaffolding frame 2 to be assembled to the upper side is formed.
On the lower side surface, a lower through hole 17 is formed in which a locking hook 16 for attaching the connecting pipe 11 to the upper part of the building 3 of the scaffolding frame 2 in advance appears.

A locking pin 14 is provided on the side surface of the collar body 13.
The operation lever 18 for carrying out the retracting operation is opened through the collar body opening 19 that projects from the inside of the short tube 12.

The locking pin 14 and the locking hook 16 can be retracted and retracted by a locking metal fitting 20 installed inside the short pipe 12, and the locking metal fitting 20 is engaged with the upper end portion as shown in FIG. A vertically elongated metal fitting main body 22 having a substantially U-shaped cross section and having a notch portion 21 on a part of the front surface while fixing the stop pin 14;
The lower end portion is bent into a substantially L shape to form a locking hook 16 and a rod-shaped L-shaped arm 24 having a recess 23 formed on the side opposite to the locking hook 16.

An L-shaped arm 24 is provided in a concave portion having a substantially U-shaped cross section which is a rear surface of the metal fitting main body 22 along the longitudinal direction of the metal fitting main body 22 with the locking pin 14 on the upper side and the locking hook 16 on the lower side. As described above, with the locking pin 14 and the locking hook 16 oriented in the same direction, the pin 25 is passed through near the center between the metal fitting main body 22 and the L-shaped arm 24, and The main body 22 of the metal fitting and the L-shaped arm 24 are rotatable. The locking metal fitting 20 is inserted into the short tube 12, the locking hook 16 of the L-shaped arm 24 is inserted into the lower through hole 17, and the locking pin 14 of the metal fitting main body 22 is inserted into the upper through hole 15. The length of the L-shaped arm 24 is set such that the upper end of the L-shaped arm 24 faces the upper opening 12a of the short pipe 12 when the L-shaped arm 24 is incorporated in the short pipe 12.

As shown in FIG. 5, the operating lever 18 is mainly made of metal fittings 2.
The operation lever main body portion 18a that abuts on both side edges of the two cutout portions 21, the protruding piece 18b that protrudes to the lower portion of the operation lever main body portion 18a and is fitted into the notch portion 21, and the operation lever main body portion 18a is inclined from the upper portion. It is composed of a lever portion 18c which extends upward and has a part of its tip bent.

The operating lever 18 is inserted into the short pipe 12 in advance before inserting the locking metal fitting 20 into the short pipe 12, and the lever portion 18c is projected from the inside of the short pipe 12 to the outside through the collar body opening 19. Then, the metal fitting main body 22 abutting on the operation lever main body portion 18a is swung back and forth by the vertical movement of the lever portion 18c.

Reference numeral 26 is a spring body formed by shaping a leaf spring into a substantially V shape. The central portion of the spring body is circularly projected to form a pressing portion 27, and both end portions are slightly bent toward the pressing portion 27 side. . This spring body 26 is formed by inserting the locking metal fitting 20 into the short pipe 12, and then, from below, the L-shaped arm 24 of the locking metal fitting 20.
Of the L-shaped arm 24 so that the pressing portion 27 is fitted into the recess 23 of the L-shaped arm 24.

Next, the case where the connecting pipe 11 is attached to the scaffolding frame 2 and the case where the scaffolding frame 2 is inserted into the connecting pipe 11 from above and locked are described with reference to FIGS. 6 to 9.

FIG. 6 shows a state in which the connecting pipe 11 is inserted into the upper end of the building 3 of the scaffolding frame 2, and when there is a gas vent hole 8 in the building 3 as in the galvanized scaffolding frame 2. Is
L-shaped arm 24 facing the upper opening 12a of the short pipe 12.
When the upper end of the short tube 12 is moved to the inner surface side of the short tube 12 by pinching it with a fingertip, the L-shaped arm 24 rotates around the pin 25 and the locking hook 16 at the lower end is moved to the lower through hole 1 of the short tube 12.
It will be more than 7

In this state, the connecting pipe 11 is connected to the building 3 of the scaffolding frame 2.
When the fingertip holding the upper end portion is loosened when it is inserted into the inside and passed through the gas vent hole 8, the lower portion of the L-shaped arm 24 is pushed back by the spring body 26, and the locking hook 16 becomes a regular engagement. Locking hook 1 when facing the dowel hole 10
6 is fitted into the regular engagement hole 10 to connect the connecting pipe 11 to the building 3
Lock on top.

Further, as described above, even if the connecting pipe 11 is inserted into the building 3 without pinching the upper end portion of the L-shaped arm 24 with the fingertip and the locking hook 16 is fitted into the gas vent hole 8, that point is also reached. When the upper end of the L-shaped arm 24 is pinched with a fingertip, the locking hook 16 can be detached from the gas vent hole 8 and the work can be continued.

When assembling the scaffolding frame, the connecting pipe 11
Another scaffolding frame 2 ′ is lifted above the scaffolding frame 2 to which is attached, and the lower end of the building 3 ′ of the scaffolding frame 2 ′ lifted above is inserted into the upper part of the connecting pipe 11, as shown in FIG. 7.

The lower end of the building 3'is the upper through hole 15 of the short pipe 12.
When coming into contact with the more protruding locking pin 14, the lower end of the building 3 ′ descends along the inclined portion of the locking pin, so that the locking pin 14 is immersed in the short pipe 12. At this time, the metal fitting main body 22 pivots inward around the lower end portion which is in contact with the inner surface of the short pipe 12, and retracts by pushing down the spring body 26 together with the L-shaped arm 24.

When the building site 3'is further inserted, as shown in FIG.
As shown in FIG. 3, the locking pin 14 that is sunk in the short pipe 12 comes to face the engaging hole 10 ′ at the bottom of the building 3 ′, and the locking pin 1
4 is fitted into the engaging hole 10 ', and the insertion of the upper scaffolding frame 2'is completed. In this way, the scaffolding frame will be built up to the top.

When the upper scaffolding frame is to be removed, as shown in FIG. 9, the lever portion 18c of the operating lever 18 is stepped on with a foot or the like and pushed down. When the lever portion 18c is pushed down, the rear end portion of the operation lever body portion 18a rotates upward, and the metal fitting main body 22 that abuts is retracted. At this time, the metal fitting main body 22 rotates inwardly around the lower end portion in contact with the inner surface of the short pipe 12 as described above, and the L-shaped arm 2
4, and the spring body 26 is pushed down to retreat.

When the operating lever main body 18a becomes substantially perpendicular to the metal fitting main body 22, the metal fitting main body 22 and the inner surface of the short pipe 12 compete with each other to fix the operation lever main body 18a, and the locking pin 14 inside the short pipe 12. It is possible to remove the building site 3'of the upper scaffolding frame 2'being kept in the state of being submerged. If the lever 18c is pushed up and returned to its original position after the building 3'is pulled out, the metal fitting main body 22 is pushed back by the spring body 26 and the locking pin 14 can be projected from the upper through hole 15 to its original position. it can.

[0029]

As described above, in the scaffolding frame connecting pipe according to the present invention, the metal fitting main body 22 having the locking pin 14 for fixing the upper scaffolding frame 2'fixed to the upper part, and the connecting pipe. 11
To the upper part of the scaffolding frame 2 and the L-shaped arm 24 provided at the lower end with a locking hook 16 pivotally attached by a pin 25 to form a locking metal fitting 20. Two
0 inside the connecting pipe 11 together with the spring body 26 and the locking pin 1
4 is in the upper through hole 15 of the short pipe 12, the locking hook 16 is freely retractable in the lower through hole 17, and the upper end of the L-shaped arm 24 is exposed to the upper opening 12a of the short pipe 12. 11
When attaching to the upper part of the scaffolding frame 2, when the fingertip is inserted into the upper opening 12a of the short pipe 12 and the upper end of the L-shaped arm 24 is moved to the inner surface side of the short pipe 12, the short pipe 12 upper part is pinched, Easy to do without worrying about the gas vent hole 8 even for a scaffolding frame having the gas vent hole 8 for the zinc plating by the locking hook 16 at the lower end of the L-shaped arm 24 being immersed in the short pipe 12. The connecting pipe 11 can be attached to the scaffolding frame.

Further, an operating lever 18 is projected from the collar body opening 19 in the collar body 13 of the connecting pipe 11, and the metal fitting main body 22 is swung by the vertical movement of the operating lever 18 so that the locking pin 14 can be retracted. Therefore, the upper scaffolding frame 2 ′ can be easily attached to and detached from the connecting pipe 11.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view of a scaffolding frame connecting pipe according to the present invention.

FIG. 2 is a perspective view showing a locking fitting.

FIG. 3 is a front view of the scaffolding frame connecting pipe according to the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a perspective view showing an operation lever.

FIG. 6 is an explanatory view showing a state in which the connecting pipe is inserted in the upper part of the scaffolding frame.

FIG. 7 is an explanatory view showing a state in which another scaffolding frame is inserted from the upper side into the connecting pipe attached to the scaffolding frame.

FIG. 8 is an explanatory diagram showing a state in which upper and lower scaffold frames are connected by a connecting pipe.

FIG. 9 is an explanatory diagram showing a state in which the upper scaffolding frame of the coupled scaffolding frames is about to be separated.

FIG. 10 is an explanatory diagram showing an example in which a connecting pipe is attached to an upper portion of a scaffolding frame.

FIG. 11 is a vertical cross-sectional view showing a conventional connecting pipe.

FIG. 12 is an explanatory view showing a state in which a conventional connecting pipe is inserted in the upper part of the scaffolding frame.

[Explanation of sign]

11 ... Connection pipe 12 ... Short pipe 13 ... Collar body 14 ... Locking pin 15 ... Upper through hole 16 ... Locking hook 17 ... Lower through hole 18 ... Operation lever 19 ... Collar body opening 20 ... Locking metal fitting 22 ... Metal fittings 24 ... L-shaped arm 25 ... Pin 26 ... Spring body

Claims (1)

[Claims] 1. A scaffolding frame connecting pipe for connecting upper and lower construction frames of a temporary scaffolding by fitting a collar body as a stepped portion near the center of the short pipe, wherein a locking pin is projected at an upper end portion. The vertically long metal fittings and the L-shaped arm having the lower end bent into a substantially L shape to form a locking hook are superposed with the locking pin and the locking hook in the same direction in the longitudinal direction. The metal fitting main body and the L-shaped arm are pivotally attached in the vicinity of the central portion to form a locking metal fitting, and the locking metal fitting is inserted into the short pipe of the connecting pipe to shorten the upper end of the L-shaped arm. While facing the upper opening of the pipe, a locking pin is attached to an upper through hole formed on the side of the short pipe above the collar body, and a locking hook is attached to a lower through hole formed on the side of the short pipe below the collar body. And the operation lever is inserted into the collar body opening that is opened in the collar body from the inside of the short pipe to the outside. And the rear end of the operating lever is brought into contact with the front surface of the metal fitting main body above the shaft attachment portion to allow the metal fitting main body to swing back and forth, and further on the back surface of the L-shaped arm below the shaft attachment portion. A connecting pipe for a scaffolding frame, comprising a spring body for urging the locking hook to project outward from the lower through hole.