JPH1181648A - H-shaped frame scaffold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely install a handrail by providing lock fittings of a designated form in two, upper and lower places each inside the upper pedestal of an H-shaped scaffold and outside the right and left vertical sides of a side frame. SOLUTION: A building frame 1 is formed by connecting the middle parts of a pair of pedestals by a horizontal cross beam to be H-shaped, and a U-shaped fitting 15 and a pin joint 14 are provided inward in two, upper and lower places of each pedestal 11 above the cross beam. A horizontal intermediate bridge is provided on the middle parts of the upper and lower sides of a rectangular frame, and the intermediate bridge and the lower side are connected to each other in two lateral middle parts in the vertical direction by two connecting materials to form a side frame 3. Further a horizontal pin-like projection 37 and a wing part 36 having an elongated hole are provided outward in two upper and lower places of the right and left vertical sides 34 of the side frame 3. In assembling a scaffold, when the frame 1 is lifted up from the lower work floor with the connecting materials of the side frame 3 held and the projection 37 is dropped in the fitting 15, the side frame 3 is hung down, taking the projection as a fulcrum, and the pin 14 is inserted in the elongated hole of the wing 36 to be substantially automatically engaged with each other. Thus, the scaffold can be constructed safely and easily by one worker.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scaffold for supporting a formwork or the like at a construction site such as civil engineering or a building, and a framework scaffold which is installed along an outer wall of a building and used as a work scaffold at a high place. About.

[0002]

2. Description of the Related Art In Japan, a log scaffold made of cedar wood, which has been produced abundantly nationwide since ancient times, has been used as a work scaffold at high places installed along the outer walls of buildings at construction sites such as civil engineering and construction. It has been. Bamboo is still used in Southeast Asian countries. Although these logs and scaffolding boards are not disposable each time, their use and storage are accompanied by significant wear and tear such as breakage, and the use of these resources is becoming less and more desirable today, when resource conservation and global environmental conservation are called for. I have.

[0003] On the other hand, steel pipe frame scaffolds made of steel pipes have been developed from early on in Europe where forest resources are scarce and suitable for use as scaffolds. They have been introduced to Japan in the 1950s through the United States, and can be used repeatedly. It is generally used in most construction sites in Japan. This steel pipe frame scaffold is also used as a support for supporting a formwork or the like.

[0004] A steel pipe frame scaffold is constructed by standing a pair of steel pipes called "building frames" facing each other at a predetermined interval, crossing a cloth frame with a plate between the cross beams of the opposing building frames, and connecting the opposing building frames. A frame scaffold is constructed by connecting predetermined units in the vertical and horizontal directions to a structural unit formed by attaching a side frame between the pillars of the frame, and the frame structural scaffold initially introduced in Japan is a basic component. As the building frame, a steel pipe frame assembled into a "gate" shape by two steel pipe pillars, a horizontal beam connecting the upper ends thereof horizontally, and a stiffener connecting the two pillars is used. "Framework scaffolding".

In such a torii frame scaffold, when a lower scaffold is formed, an upper frame scaffold is assembled, and when disassembling, the scaffold is similarly sequentially disassembled from the upper stage. Since the work is performed while standing on the cloth frame with the plate at the top of the uppermost step, there are no pillars or handrails for safety around, and there is a problem that the danger of falling down is large.

Therefore, as a framework scaffold for solving such a danger, for example, one disclosed in Japanese Utility Model Publication No. 1-18753 has been proposed. This will be described with reference to FIG. The building frame 1 used for this scaffolding scaffold is a steel pipe frame assembled into an H-shape by two pillars 11, a cross beam 12 connecting the middle portion in the horizontal direction and a stiffener 13, and Therefore, a framework scaffold using this building frame is referred to as an “H-frame scaffold”.

The procedure for assembling this H-shaped scaffolding scaffold is basically the same as that of the conventional torii-shaped scaffolding scaffolding. A cross brace 4 is attached to a portion of the pillars 11 below the horizontal beams 12 below the horizontal beams 12 to stabilize the horizontal direction, and a plate serving as a scaffold between the opposing building frames 1 and 1 is provided. A cloth frame 2 with a plate is attached to form a structural unit. This one
It is indicated by the symbol I as a step.

A jack base 6 is inserted below the pillar 11 of the lowermost building frame 1 so that the height of each pillar 11 can be adjusted. Furthermore, when connecting the building frame 1 vertically,
The connection joint 5 is inserted between the upper and lower pillars 11 and 11 and connected. The upper and lower portions of the joint 5 have a small diameter that fits into the steel pipe of the pillar 11, the middle portion is thicker, and have a diameter substantially equal to the outer diameter of the steel pipe of the pillar 11. A small hole for inserting a pin clip or the like is provided.

On the first stage, a similar structural unit is denoted by the symbol II.
The second step is installed as shown by, and this is repeated a required number of times to form a framed scaffold having a predetermined height. Connect the required number of structural units in the horizontal direction. As is apparent from this figure, in the H-shaped scaffold scaffold, the cloth frame 2 with a plate is installed at almost the middle height of each step, and immediately after the cloth frame 2 with the plate is stretched over, the side surface against the pillar is strong. Since the frame 3 can be attached, work can be performed safely even at the stage of assembling the upper framed scaffold. As described above, since the handrail is installed on the H-shaped framework scaffold prior to the assembling of the upper framework scaffold, it is also referred to as a "handrail precedent type", and is being welcomed by workers and the demand is increasing.

[0010] The present applicant has also invented such an H-shaped scaffold, which has been disclosed in Japanese Patent Publication No. 7-30616. This is basically a handrail leading type frame scaffold similar to the above-described H-shaped frame scaffold, and each component and reference numeral are substantially the same as those in FIG. It has a feature in the mounting structure to the building frame 1 and makes the mounting work extremely easy.

FIG. 5 shows a side frame 3 described in Japanese Patent Publication No. 7-30616. The side frame 3 is a rectangular frame made of steel pipe, having a horizontal middle rail 33 provided between the upper and lower sides 31 and 32,
At two locations above and below 34, locking metal fittings for attachment to the building frame are provided facing outward. FIG. 6 (a) shows the upper one, and 36 is a wing provided with a horizontal elongated hole. Also, (b) shows the lower one, and 37 is a pin-like projection projecting in the horizontal direction.

On the other hand, locking metal fittings 14 and 15 for attaching the side frame 3 are provided at two places above and below the upper leg 11 of the building frame 1 shown in FIG. ) Is the upper one, 14 is a pin joint inserted into a long hole provided in the wing part 36 provided above the end of the side frame 3;
(B) is a U-shaped metal fitting which receives a horizontal pin-like projection 37 provided below the end of the side frame 3 at the lower side.

The worker mounts the side frame 3 on the cloth frame 2 with a plate, inserts the pin-like projection 37 on the lower side of the side frame 3 into the U-shaped bracket 15 on the lower side of the pillar 11, and With this as a fulcrum, the side frame 3 is pulled up, and the wing on the upper side of the side frame 3
The attachment is completed by inserting the long hole of 36 into the pin joint 14 above the pillar 11. Here, the pin-shaped projection 37 is usually called a "dove", and has a slightly larger tip portion to prevent the U-shaped bracket 15 from dropping out of the groove, and the long hole of the wing portion 36 has a degree of freedom in the horizontal direction. This makes it easy to fit.
The pin joint 14 has a gravity type locking claw called a gravity lock, and is generally used in a frame scaffold.

[0014]

[Problems to be Solved by the Invention] By the way, Tokiko 7-3
In the framework scaffold described in Japanese Patent No. 0616, although the attachment and detachment of the side frames 3 has become extremely easy, in order to do this, the upper plated cloth without the side frames 3 equivalent to handrails is still required. Since it is necessary to ride on the frame 2, lift the side frame 3 to the mounting position, and mount the side frame 3, safety measures such as locking a fall prevention safety rope to the pillar 11 are necessary. Improvement was desired.

An object of the present invention is to further improve the safety by allowing the work of attaching the side frame 3 to be performed from a safe work floor one step below.

[0016]

A frame scaffold according to the present invention comprises a pair of building frames which are erected at a predetermined distance from each other, and a cloth frame with a plate is bridged between cross beams of the opposing building frames. An H-shaped frame scaffold comprising a frame scaffold constituted by connecting a structural unit formed by attaching a side frame between pillars of a frame in a vertical direction and a horizontal direction to form a frame scaffold, wherein the building frame includes a pair of steel pipe pillars. The middle part of is connected horizontally by a horizontal beam to form an H shape,
At the upper and lower portions of the upper pedestal above the cross beam, locking metal fittings for attaching the side frame are provided facing inward, and the upper one is provided with a horizontal pin provided at the upper end of the side frame. A U-shaped bracket for receiving the projections, the lower one being a pin joint inserted into a long hole of a wing provided on the lower side of the end of the side frame, and the side frame being the upper and lower sides of a rectangular frame body The middle crosspiece is provided in the middle of the center, and the middle crosspiece and the lower side are vertically connected by a connecting material at two middle places in the left-right direction. An attachment metal fitting is provided facing outward, the upper one is a horizontal pin-like projection, and the lower one is a wing provided with a long hole.

[0017]

According to the present invention, the upper side frame can be mounted from the lower work floor one step below, and when the side frame corresponding to the handrail is not mounted, the upper frame is raised to the upper work floor. Since there is no need to perform the above-described side frame mounting operation, safety in operations such as assembly and disassembly on the frame scaffold is improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described in detail with reference to FIGS. The overall configuration of the H-frame scaffold of the present invention is substantially the same as that of FIG. 4 described above, and is not shown again. FIG. 1 is a front view showing a building frame of this embodiment, FIG. 2 is a front view showing the same side frame, and FIG. 3 is a partial perspective view showing a locking portion between the building frame and the side frame in this embodiment. The reference numerals are the same as those described above.

As shown in FIG. 1, the construction frame 1 of the present invention has an H-shape by connecting a middle portion between a pair of steel pipe pillars 11 in a horizontal direction with a transverse beam 12, and connecting the pillar 11 and the transverse beam 12. After being appropriately connected by stiffeners 13, locking metal fittings for attaching a side frame are provided at two locations above and below the upper beam above the cross beam 12 with the inside facing toward the inside.
The upper one is a U-shaped bracket 15 provided on the upper end of the side frame 3 for receiving a horizontal projection, and is similar to the one shown in FIG. 7B earlier. The lower one is a pin joint 14 inserted into a long hole provided in the wing provided below the end of the side frame 3, which is the same as that shown in FIG. 7A earlier. . In other words, the building frame and the side wall frame mounting fastener in the frame scaffold described in Japanese Patent Publication No. Hei 7-30616 are mounted upside down.

On the other hand, as shown in FIG. 2, the side frame 3 of the present invention is provided with a horizontal center beam 33 between the upper and lower sides 31 and 32 of a rectangular frame, and at two intermediate positions in the left and right direction. The middle rail 33 and the lower side 32 are vertically connected by two connecting members 35. Since the connecting member 35 also reinforces the middle rail 33 or the entire side frame 3, the connecting member 35 may reach the upper side 31 through the middle rail 33.

Further, locking metal fittings for attachment to the building frame are provided at two locations above and below the left and right vertical sides 34 so as to face outward. The upper one is a horizontal pin-like projection 37, and the lower one is a wing part 36 provided with a long hole, as shown in FIG.
As in the case of the building frame 1, the side frames and the locking metal fittings for mounting the side frames in the frame scaffold described in JP-A-30616 are mounted upside down.

A reference value is temporarily set for the left-right space of the side frame 3, that is, the predetermined space for erecting the building frame 1, and is 1500 m.
m or 1800 mm. On the other hand, since the weight of the side frame 3 is about 6.7 kg and 7.6 kg, respectively, it is originally a weight that can be sufficiently lifted by one person. By gripping the vicinity of the lower part, the side frame 3 can be lifted up from the already completed lower working floor to above the upper plate-mounted cloth frame. By the way, the distance between the upper and lower working floors, that is, the height of the building frame on the unit scaffold is usually 1800 mm
It is.

The side frame 3 is lifted from the lower work floor, and the upper pin-shaped projection 37 is first dropped into the U-shaped bracket 15 of the pillar 11, and the side frame 3 is hung with this as a fulcrum.
Since the lower wing portion 36 overlaps the pin joint 14 and the pin is inserted into the long hole and the gravity lock is automatically activated, the engagement is almost automatically completed, and this operation can be performed safely and safely by one worker. It can be done easily.

[0024]

According to the present invention, there is no need to work on the upper scaffold without the handrail attached, and the safety in assembling and disassembling the framework scaffold is greatly improved. It works.

[Brief description of the drawings]

FIG. 1 is a front view showing a building frame according to an embodiment of the present invention.

FIG. 2 is a front view showing a side frame according to the embodiment of the present invention.

FIG. 3 is a perspective view showing a locking portion between the building frame and the side frame in the embodiment of the present invention.

FIG. 4 is a perspective view of an H-frame scaffold showing a conventional technique.

FIG. 5 is a front view showing a side frame according to the related art.

FIG. 6 is a front view showing a lock provided on a side frame according to the related art.

FIG. 7 is a front view showing a lock provided on a building frame according to a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building frame 2 Cloth frame with board 3 Side frame 4 Cross brace 5 Joint 6 Jack base 11 Pillar 12 Cross beam 13 Stiffener 14 Pin joint 15 U-shaped bracket 31 Upper side 32 Lower side 33 Middle rail 34 Vertical side 35 Connecting material 36 Wings Part 37 Pin-shaped protrusion

Continued on the front page (72) Inventor Satoru Koiwai 3-4-2, Midorioka, Ageo-shi, Saitama Pref.

Claims (1)

[Claims] 1. A pair of building frames (1) are erected at predetermined intervals to face each other, and a cloth frame with a plate (2) is bridged between cross beams (12) of the opposing building frames (1). An H-shaped frame scaffold comprising a frame scaffold formed by connecting predetermined units in a vertical direction and a horizontal direction with structural units each having a side frame (3) attached between pillars of the frame (1), 1) Horizontally cross beam (12) near the middle of a pair of steel pipe pillars (11)
To form an H-shape, and upper and lower pedestals above the cross beam (12) are provided with locking metal fittings for mounting the side frame at two locations above and below the upper pedestal. (3) A U-shaped bracket (15) for receiving a horizontal pin-like projection (37) provided on the upper side of the end, and the lower one is a wing section (3) provided on the lower side of the side frame (3). 36) The pin joint (14) inserted into the long hole, and the side frame (3)
A horizontal center rail (33) is provided in the middle of the upper and lower sides (31, 32) of the rectangular frame.
3) and the lower side (32) are connected vertically by a connecting material (35), and furthermore, at two places above and below the left and right vertical sides (34), locking metal fittings for attachment to the building frame face outward. The upper one is a horizontal pin-like projection (37),
An H-shaped scaffold, characterized in that the lower one is a wing (36) provided with a long hole.