JPH09184307A - Horizontal tie material for form timbering - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent lateral movement of a cloth frame through a simple work when a horizontal tie material having size longer than the width of the cloth frame is used. SOLUTION: A horizontal tie material for a form timbering comprises a body part 30 made of a steel pipe, and joint parts 31A connected to the two ends of the body part. The joint part 31A has a first protrusion part 33, a recessed part 34, a second protrusion part 35, and a tip parallel part 36, formed, in the order, from the inner side connected to the body part. The heights of the recessed part 34 and the tip parallel part 36 are equal to that of the body part 30, and the width of the recessed part 34 is approximately equal to width enough to allow containing of the two clamps of a cloth frame. Spanning is effected in such a manner that the clamp of the cloth frame is placed on some of the body part 30, the recessed part 34, and the tip parallel part 36.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a horizontal tie member used for formwork support for holding a formwork when placing concrete on horizontal parts such as floor slabs and ceilings in the fields of civil engineering and construction. Regarding

[0002]

2. Description of the Related Art A pipe support is used as a form support for holding a form when placing concrete on horizontal parts such as civil engineering, bridge floor slabs, building floor slabs, and ceilings in the field of construction. Formwork support and frame formwork support are common. The pipe support type frame support is to lay out steel pipes as pillars at appropriate intervals to support the horizontal formwork at the upper end, and the frame type formwork support is used for building scaffolding etc. It is assembled to a predetermined height, and the upper end supports the horizontal formwork.

"New edition frame, edited by the Temporary Industrial Association of Japan"
An example of the construction of frame-type formwork support work will be explained with reference to the chapter “4. Frame assembly formwork supportwork” from “Practical Manual for Support Work” (Ohmsha, 1993). . FIG. 5 is a perspective view showing the form support of this construction example, 3 is a horizontal tie member, 4 is a cross bracing, 5 is a building frame, 6 is a fabric frame, and 7 is a large bracing.

First, the building frame 5 is assembled in the horizontal and vertical directions, and frame surfaces parallel to each other are assembled at regular intervals. In each layer and each span, cross braces 4 are attached between the building frames 5 between the frame surfaces, and horizontal stacking materials 3 are provided in both the frame surface direction and the cross bracing direction each time 5 layers are stacked, and a horizontal connecting material In order to prevent displacement of 3, diagonal diagonal braces 7 are provided in the frame surface, for example, every 5 layers.
A cloth frame 6 is attached to each span within the top layer and every 5 layers or less. The cloth frame 6 serves as a scaffold for assembling and disassembling this support work.

FIG. 6 is a front view showing the uppermost step portion of this form supporting work, in which 8 is a jack, 91 is a large pull, 92 is a joist, 93 is a dam, and C is concrete. On the upper part of the pedestal of the building frame 5, insert the jack 8 for receiving the pulling 91 and enabling the level adjustment, and pull the upper end of the jack 8
Fix at 91. It is necessary that the Daihiki 91 spans three or more building frames. A weir board 93 is installed above the haul 91 with a joist 92, and concrete C is placed.

FIG. 7 shows an example of a building frame 5 which is a basic component of a frame-type form supporting work. The building frame 5 includes two steel pipe pedestals 51 placed in parallel, a horizontal beam 52 that horizontally connects the upper ends thereof, and a stiffener 53 that connects these to increase rigidity.
It is a frame made of steel pipe that is integrally assembled in the shape of a "gate," and is also called a "torii" because of its shape. In the frame-type form support, the building frame 5, which is a component, is a general-purpose product as a temporary material, and the pedestal 51 usually has an outer diameter of 42.7.
Since a steel pipe of mm is used, the size of the steel pipe cannot be arbitrarily selected according to the design load, and when the point of action of the load is immediately above the pedestal 51 of the building frame 5, that is, the maximum load is applied. Even if it is possible, the permissible load per frame is about 5 tons (2.5 tons per pedestal). When it is necessary to support a large load exceeding this, multiple frames are crossed to support. Special construction such as increasing the number of points was required, and there was a limit in terms of workability.

In order to solve such a problem, the present applicant has previously used a steel pipe pedestal instead of a general-purpose torii-shaped building frame, and has a horizontal connecting material and a cross support in the horizontal direction. We applied for a heavy-duty formwork support and its members constructed by using (Japanese Patent Application No. 7-50734). This embodiment will be described with reference to FIG. FIG. 8 is a perspective view showing this heavy-duty formwork support, which is composed of pedestals 1, member attachment hardware 2, horizontal tie members 3, cross braces 4, etc. As a hot dip galvanized finish. A cloth frame 6 is spanned between parallel horizontal tie members 3, and a jack 8 as a base jack is inserted at the bottom of the pedestal 1.

The details of the pedestal 1 are shown in FIG. Use it vertically with the left side facing down in this figure. The body part 10 is, for example, a galvanized steel pipe having an outer diameter of 60.5 mm and a wall thickness of 3.2 mm, and a joint pipe 11 for connection has an outer diameter of 54.6 mm and a wall thickness of 3.8 mm at the upper end.
A mm short tube is inserted and fixed by welding. The protruding length of the joint pipe 11 is 100 mm. The length of the main body portion 10 of the pedestal 1 excluding the joint pipe 11, that is, the dimension L in FIG. 9, is one unit in the height direction of the support work. L
About, it is convenient to prepare various sizes. Moreover, various outer diameters and wall thicknesses of the pedestal 1 can be prepared according to load conditions, and can be selected and used.

A predetermined distance from both ends of the pedestal 1, for example 50 mm
A pin hole 12 is provided at the position of, and a pin hole 13 is further provided inside thereof, and a bolt or a pin for vertically connecting the pedestal is inserted into the pin hole 12. On the other hand, a bolt is passed through the pin hole 13 to mount the member mounting hardware 2.
The member mounting hardware 2 is configured, for example, by mounting lock pins protruding on the surface of a short tubular sleeve in four directions in the radial direction of the short tube and at right angles to each other.

A front view of the horizontal tie member 3 is shown in FIG. 10, and a plan view thereof is shown in FIG. It is configured by attaching joint portions 31 to both ends of a main body portion 30 made of a steel pipe. In this example, the joint part
Reference numeral 31 is a rectangular plate shape having a pin hole 32 at one end, and the other end is fixed by being inserted into the main body portion 30. The pin hole 32 is inserted into the lock pin of the member mounting hardware 2 mounted on the pedestal 1 and mounted horizontally.

FIG. 12 is a front view showing one unit of this framework,
FIG. 13 is a side view of the same. Four pedestals 1 in which two member mounting hardware 2 are fitted near both ends in the up-down direction are erected at the positions of the vertices of the square as viewed on a horizontal plane, and these pedestals 1 are used to raise the sides of the square. Cross braces 4 are attached to each of the four vertical surfaces formed in, and horizontal connecting members 3 are provided near the top of the pillar, for example, in the gable surface direction or girder surface direction.
When attached, a framework is formed with four pillars as a minimum unit.

As shown in FIG. 8, the cloth frame 6 serving as a work floor is bridged between the horizontal connecting members 3 which are parallel to each other.
In the conventional frame-type formwork support work, this was integrated with the pedestal part as a horizontal beam which is a part of the building frame. However, in this heavy-load formwork support work, the horizontal tie member 3 is a member mounting hardware. Since it is attached to the pedestal 1 via 2, it is possible to prepare, select and use various sized ones.

An example of the cloth frame 6 is shown in FIG. The cloth frame 6 is constructed by connecting two longitudinal ends of two floor members 61 having anti-slip projections on the surface with end members 62, and attaching clamps 63 to the four corners. As described above, since the structure is more complicated than the frame part and safety assurance is required, it is desirable to use the standard product for the cloth frame. The cloth frame 6 shown in FIG. 14 has spans spanning over, that is, the center interval of the clamps 63 is 1829 mm, and the width thereof is 500 mm. Besides this, floor materials 61
There is also an auxiliary cloth frame with a width of 240 mm that uses only one sheet.

Therefore, even if the length of the horizontal tie member 3 is arbitrarily selected, the width of the cloth frame 6 spanning the horizontal tie member 3 cannot be arbitrarily determined. Therefore, depending on the length of the horizontal tie member 3, an integer number of cloth frames can be used. However, there will be an excess or deficiency in the width direction. Since it is not preferable to stack the fabric frames 6 on top of each other,
If the length of the horizontal tie member 3 does not match the width of the cloth frame 6, the number of cloth frames 6 is reduced or replaced with a narrow auxiliary cloth frame 6a. Saga cloth frame 6
Since it is too long with respect to the width, the cloth frame 6 is laterally moved, which is dangerous. To prevent this, it is necessary to fix the cloth frame 6 with a wire or a rubber band. Such a fixing method is not only uncertain, but the work is complicated, and improvement has been desired.

[0015]

DISCLOSURE OF THE INVENTION The present invention has improved this point, and in the case of using a horizontal tie member which is longer than the width of the cloth frame, it is possible to securely fix the cloth frame with a simple operation. The object is to provide a horizontal tie material that can be used.

[0016]

The present invention according to claim 1 is a horizontal connecting member for horizontally connecting two stanchions made of steel pipe in a frame support work at a predetermined position. Of the main body and a joint portion that is connected to both ends of the main body portion and has a mounting pin hole. , A second convex portion and a tip parallel portion are sequentially formed, the height of the concave portion and the tip parallel portion is approximately equal to the height of the main body portion, the first and second convex portions are higher than this,
Further, the width of the recess is substantially equal to the width of two clamps of the cloth frame used in the frame supporting work, which is a horizontal tie member for the frame supporting work.

The invention according to claim 2 is the horizontal tie member for formwork support according to claim 1, wherein the joint portion is flat. The present invention according to claim 3 is that the joint portion is manufactured by flatly crushing a portion continuous with the main body portion made of steel pipe and punching the periphery thereof into a predetermined shape. Horizontal tie material for formwork support.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the horizontal tie member of the present invention will be described with reference to the drawings. 1 is a front view showing the horizontal tie member 3A, and FIG. 2 is a plan view of the same. Reference numeral 30 is a main body portion, 31A is a joint portion, and 32 is a pin hole provided in the joint portion 31A.
Although the shape and size of the joint portion 31A is constant, the center distance P of the pin holes 32 at both ends can be changed by changing the length of the main body portion 30.
Is easy to change.

As will be apparent from comparison with the conventional horizontal tether 3 shown in FIGS. 10 and 11, this horizontal tether is clear.
The characteristic of 3A lies in the joint portion 31A. That is, the first convex portion 33, the concave portion 34, the second convex portion 35, and the distal end parallel portion 36 are sequentially formed from the inner position connected to the main body portion toward the outer distal end direction. The height of the bottom of the recess 34 and the edge of the parallel tip 36 in FIG. 1 is substantially equal to the height of the main body 30, and the heights of the first and second projections 33 and 35 are higher than this. In addition, the length of the bottom side of the concave portion 34 is determined by the clamp 63 of the cloth frame 6.
It is almost equal to the width of two sheets, for example, 25 mm. The reason is that the cloth frames are attached to both sides of a part of the building frame, and therefore two clamps are stretched over the recess 34. However, if the length of the base is longer than this, lateral movement of the cloth frame occurs, which is not preferable.

When handing over the cloth frame 6 in the form supporting work using this horizontal tie member 3A, the clamp 63 of the cloth frame 6 is used.
If any of them is hung on the main body portion 30, the concave portion 34, or the tip parallel portion 36 of the horizontal tie member 3A, since the heights of both are almost equal, they can be laid horizontally. An example of forming formwork supports of various sizes using the horizontal tie material of the present invention will be described with reference to FIG.

(A) shows the distance (center distance) between the pedestals on both sides.
When three fabric frames 6 with a width of 1800 mm and a width of 500 mm are arranged side by side, a horizontal tie material with P = 1670 mm is used. When the outer clamps of the cloth frames 6 at both ends are hooked in the recesses of the joint portion 31A, the three cloth frames do not move laterally. In (b), the distance between the pillars on both sides (center distance) is 1500 mm, two cloth frames 6 with a width of 500 mm, and an auxiliary cloth frame 6a of 240 mm
When laying out the sheets side by side, use a horizontal tie material of P = 1370mm. When the outer clamps of the cloth frames 6 at both ends are hooked on one side to the tip parallel part of the joint portion 31A and the other side to the recess, the three cloth frames do not move laterally.

(C) shows the distance (center distance) between the pedestals on both sides.
When two fabric frames 6 with a width of 1200 mm and a width of 500 mm are arranged side by side, a horizontal tie material of P = 1070 mm is used. If the outer clamps of the two cloth frames 6 are hooked on the parallel portions of the ends of the joint portion 31A, the two cloth frames do not move laterally. In (d), the distance (center distance) between the pedestals on both sides is 1000 mm, and a 500 mm wide cloth frame 6 and a 240 mm auxiliary cloth frame 6a are arranged side by side, and a horizontal tie material of P = 870 mm is used. To do. The outer clamps of the cloth frame 6 and the auxiliary cloth frame 6a are connected to each other, and the cloth frame 6 is a parallel portion of the joint portion 31A, the auxiliary cloth frame.
If 6a is hung on the recess, the two cloth frames will not move laterally.

(E) is the distance (center distance) between the pedestals on both sides.
With 900 mm and one cloth frame 6 with a width of 500 mm,
Use horizontal ties of P = 770mm. When all the clamps on the outside of the cloth frame 6 are hooked on the main body of the horizontal tie member, the cloth frame is sandwiched between the first protrusions and does not move laterally. In (f), the distance (center distance) between the pedestals on both sides is 600 mm, and one auxiliary fabric frame 6a with a width of 240 mm is spanned over, and a horizontal tie material of P = 470 mm is used. If the clamp on one side of the auxiliary cloth frame 6a is hooked on the concave portion of the joint portion 31A, the auxiliary cloth frame does not move laterally.

The method for manufacturing the horizontal tie material of the present invention will be described with reference to FIG. First, in the first step, as shown in (a), both end portions 31a of the steel pipe as a raw material are flatly crushed. Then, as a second step, as shown in (b), the periphery of the flattened portion is punched into a predetermined shape. At the same time, it is preferable to punch out the pin hole 32. In this way, the joint portion 31A can be accurately processed by the press processing of only two steps.

The horizontal tie material of the present invention has been described in the example of the heavy load formwork supporting work described in Japanese Patent Application No. 7-50734. For example, the pipe support type conventionally used. It goes without saying that it can also be used for other formwork supports such as formwork support.

[0026]

EFFECTS OF THE INVENTION According to the present invention, the excellent effect that the cloth frame can be attached without any special fixing means without fear of lateral movement and the workability and safety are remarkably improved. is there.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a horizontal tie member of the present invention.

FIG. 2 is a plan view showing an embodiment of a horizontal tie member of the present invention.

FIG. 3 is an explanatory diagram showing a usage pattern of the horizontal tie member of the present invention.

FIG. 4 is an explanatory view showing a method for manufacturing a horizontal tie member of the present invention.

FIG. 5 is a perspective view showing an example of construction of the formwork support work according to the present invention.

FIG. 6 is a front view showing the uppermost step portion of the formwork support work according to the present invention.

FIG. 7 is a front view of a building frame showing a conventional technique.

FIG. 8 is a perspective view showing a conventional heavy load formwork support.

9 is a front view showing a pedestal in the heavy load formwork support of FIG. 8. FIG.

10 is a front view showing a horizontal tie member in the heavy load formwork support of FIG. 9.

11 is a plan view showing a horizontal tie member in the heavy load formwork support of FIG. 9.

[FIG. 12] 1 of the frame in the heavy-duty formwork support of FIG.
It is a front view which shows a unit.

FIG. 13: 1 of the framework in the heavy load formwork support work of FIG.
It is a side view which shows a unit.

14 is a perspective view showing a cloth frame in the heavy load formwork support work of FIG. 9.

[Explanation of symbols]

 1 pedestal 2 member mounting hardware 3 horizontal tie material 4 cross braces 5 construction frame 6 cloth frame 6a auxiliary cloth frame 7 major braces 8 jack 10 (pedestal) body part 11 joint pipe 12, 13 pin hole 30 (horizontal tie material ) Body part 31 Joint part 32 Pin hole 33 First convex part 34 Recessed part 35 Second convex part 36 Tip parallel part 51 (Building frame) Pillar 52 Side beam 53 Stiffener 61 (Cloth frame) Floor material 62 End member 63 Clamp 91 Daihiki 92 Joist 93 Weirboard

Claims (3)

[Claims] 1. A horizontal tie member (3) for horizontally connecting two stanchions (1) made of steel pipe in a form supporting work at a predetermined position, the main body part (30) made of steel pipe, Joint part (31A) connected to both ends and having mounting pin holes
The joint portion (31A) is composed of a first convex portion (33), a concave portion (34), and a second convex portion ( 35) and the tip parallel part (36) are sequentially formed, and the heights of the concave part (34) and the tip parallel part (36) are substantially equal to the height of the main body part (30), and the first and second convex parts are formed. The parts (33, 35) are higher than this, and the width of the recess (34) is almost equal to the width of two clamps (63) of the cloth frame (6) used in the frame support work. Horizontal tie material for formwork support. 2. The horizontal tie member for formwork support according to claim 1, wherein the joint portion (31A) is flat. 3. The joint part (31A) is manufactured by flatly crushing a part continuous with a main body part made of steel pipe and punching the periphery thereof into a predetermined shape.
Horizontal tie material for formwork support as described in.