JP2000170321A - Lightweight sleeper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lightweight sleeper formed by combining steel plate bending members back to back with each other and excellent in load bearing strength by light-weight. SOLUTION: Since two sleeper members 5 formed in both up and down edges of back boards 2 by connecting folding sections 3 and 4 bent to the same face side are fixed back to back with each other at part of the back boards 2 to form a lightweight sleeper 1 by using steel plates, even if the longer-sized sleeper is formed of two parts together facing in opposite directions of the back boards 2 and both up and down bending sections 3 and 4, bent up resistive strength by light-weight is further increased, and a heavy load can be supported.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lightweight pulley used for supporting a formwork when constructing various buildings and structures.

[0002]

2. Description of the Related Art In the construction of various buildings and structures, slabs are formed by assembling a shoring on a slab on a lower floor, and placing joists on a slab supported at an upper end of the shoring.
After arranging the reinforcement on the formwork laid on the joists, concrete is cast and the slab on the upper floor is constructed.

[0003] Conventional pulleys used in the construction of slabs as described above must generally support the concrete weight of the slab, and therefore generally use thick wooden beams.

[0004]

However, a thick wooden timber is heavy in weight and not only takes time to handle, but also is expensive and it is difficult to secure the thick wooden timber. .

SUMMARY OF THE INVENTION An object of the present invention is to provide a light weight pull-out which uses a bent metal plate, is inexpensive, lightweight and easy to handle, and has excellent load-bearing strength.

[0006]

In order to solve the above-mentioned problems, a first aspect of the present invention is to use a metal plate and form a bent portion which is bent to the same surface side at upper and lower edges of a horizontally long strip-shaped back plate. A horizontal portion where the bent portion bends from the upper and lower edges of the backboard to the same plane side, a vertical portion which is bent inward at a right angle inward from the tip of the horizontal portion, and This adopts a configuration formed by an inward portion bent at a right angle toward the backboard.

According to a second aspect of the present invention, a metal plate is used and the upper and lower edges of the horizontally long strip-shaped back plate have bent portions bent to the same plane side, and the bent portions are flush with the upper and lower edges of the back plate. A horizontal portion bent to the side, a vertical portion bent at a right angle toward each other inward from the tip of the horizontal portion, and an inward portion bent at a right angle toward the backboard side from the tip of the vertical portion. In this configuration, the two large members are fixed back-to-back at the back plate.

According to a third aspect of the present invention, a metal plate is used and the upper and lower edges of the horizontally long strip-shaped back plate have bent portions bent to the same plane side, and the bent portions are flush with the upper and lower edges of the back plate. A horizontal portion bent to the side, a vertical portion bent at a right angle toward each other inward from the tip of the horizontal portion, and an inward portion bent at a right angle toward the backboard side from the tip of the vertical portion. In this case, the two large members are fixed back-to-back at the back plate with the spacing member interposed therebetween.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the two large pulling members are fixed in a back-to-back manner at a back plate portion so that a step in the longitudinal direction is generated at an end portion. It adopts the configuration described above.

[0010] A fifth aspect of the present invention is the invention according to the first to fourth aspects, in which a reinforcing rib is provided on a back plate of the large pulling member.

[0011]

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

In the first embodiment shown in FIG. 1, the light weight puller 1 is made of a metal plate such as a steel plate or an aluminum plate, and is formed to have high rigidity by, for example, a uniform forming process using a high-tensile steel plate. Specifically, two large members 5, 5 in which bent portions 3, 4 bent to the same side are coupled to upper and lower edges of a horizontally long strip-shaped back plate 2, are attached to the back plate 2. The light-weight pulley 1 has a structure in which the end fittings 6 are fixed to both ends thereof by welding, caulking, or the like.

The large pulling member 5 is made of, for example, a 1.2 mm-thick high-strength steel plate, and the back plate 2 of the large pulling member 5 is a strip having a height of about 240 mm. 3 and 4 are bent from the upper and lower edges of the back plate 2 to one side.
A horizontal portion 8 having a width of 0 mm and a vertical portion 9 having a height of 25 mm which is bent at right angles inward from the tip of the horizontal portion 8 toward each other.
And a 10 mm wide inward portion 10 that is bent at right angles from the tip of the vertical portion 9 toward the backboard 2 side,
The lightweight pulling 1 comprises the above-mentioned two pulling members 5 and 5
Are formed by fixing the overlapped portion by spot welding or caulking, and the lightweight puller 1 reinforces the upper and lower sides of the vertical back plate 2 which is a two-layered structure by bending portions 3 and 4 on both sides. It has a cross-sectional structure, is lightweight, has excellent bending moment and load bearing strength, and is strong against impact. Note that the length of the lightweight pulley 1 may be set according to the conditions of use.

FIGS. 2 (A) and 2 (B) show the second structure of the lightweight pulley 1. FIG.
The rib 11 along the longitudinal direction of the large pulling member 5 is formed at a plurality of upper and lower portions of the back plate 2 in the both large pulling members 5 so as to protrude on opposite surfaces of the both back plates 2, The bending resistance of the light pulley 1 is improved. The rib 11 may have a rectangular shape or a V-shape other than a semicircular cross section.

FIG. 3 to FIG. 5 show a third embodiment of the lightweight pulley 1, which is a different example of means for reinforcing the back plate 2 and connecting means in both pullout members 5 used in combination with spot welding and rivet connection. Is shown.

3 (A) and 3 (B), an elongated hole 12 in the vertical direction is provided on both back plates 2 and an arc-shaped rib 13 is formed around the elongated hole 12 while one of the elongated holes 12 is formed. The inner circumference is bent along the inner circumference of the other long hole by burring or pressing,
The two large pulling members 5 are joined together at the bent portions and the reinforcement by the ribs 13.

FIGS. 4A and 4B show an example in which a long hole 14 in the vertical direction is provided in both back plates 2, and a folded peripheral wall 15 is provided around the long hole 14 in both back plates 2. 15 and light weight 1
Has improved bending resistance.

FIGS. 5A and 5B show an example in which bulging portions 16 are provided on opposite surfaces of the two back plates 2 so as to protrude, and the bulging portions 16 improve the bending resistance of the lightweight pull-out 1. And
The bulging portion 16 may be not only a circular shape as shown but also other shapes such as a rhombus and a rectangle, and the bulging portion 16 may be provided with a punched hole.

The lightweight pulley 1 according to the fourth embodiment shown in FIGS. 6 to 8 has a long length when the two pulley members 5, 5 are overlapped and joined back to back at the back plate 2. The position is shifted in the vertical direction so that a step in the longitudinal direction is generated at the end. The ends of the large members 5, 5 are subjected to a process in which the end fittings 7 are applied and fixed by means such as welding or caulking.

As described above, when a step is formed at the ends of the large pulling members 5, 5, when the light weight pulling rods 1 are arranged in a straight line, as shown in FIGS. The portion is accommodated in the concave portion of the other party, and the joist does not fall off between the ends of the lightweight pulleys 1 arranged linearly when supporting the joist described later.

FIGS. 9A and 9B show a light weight pulley 1 according to a fifth embodiment.
When overlapping and joining back-to-back at the portion of the back plate 2, a spacing member 37 made of a square pipe is sandwiched between the back plates 2 at a predetermined interval in the length direction, and two sheets are sandwiched between the spacing members 37. The pull members 5, 5 are fastened with rivets 38.
In the fifth embodiment, similarly to the fourth embodiment, the two large pulling members 5, 5 may be fastened at different positions in the length direction.

FIG. 10 shows a use state in which a slab is constructed using the above-mentioned lightweight puller 1 of the present invention. A shoring 22 as a pipe structure is assembled on a slab 21 on the lower floor.
At the upper end of each vertical column 23 of the support 22, a large undertaking 24 is attached, and the large undercarriage 1 is placed on the large undertaking 24 arranged in series.
Is fixed with the stopper 25.

FIG. 11 shows the structure of the large undertaking fitting 24, and FIG.

The large support fitting 24 is formed by screwing a nut 27 with a handle mounted on the upper end of the vertical column 23 to a screw shaft 26 inserted into the vertical column 23 of the support 22. 1 is formed by fixing an upward U-shaped receiving member 28 for supporting the light weight pulley 1, and the supporting height of the light weight pulley 1 can be adjusted by rotating the nut 27.

The stopper 25 is formed by screwing a bolt 31 upward from a lower portion to a horizontal nut 30 provided at the lower end of the U-shaped frame 29, and supporting the upper end of the U-shaped frame 29 with a support member 32.
Is formed so as to be swingable by a pin 33, and the light pulley 1 is placed on a receiving member 28 of a large receiving metal fitting 24.
A U-shaped frame 29 is externally fitted over the lower bent portion 4 of the lightweight puller 1 and the receiving member 28, and the bent portion 4 and the receiving member 2 are screwed in with the bolt 31 and the supporting member 32.
8 are fastened to each other, and by making the support member 32 swingable, the bent portion 4
Of the U-shaped frame 29 can be performed without any trouble.

An engaging recess 34 for the bent portion 4 of the lightweight pulley 1 is provided in the upper inner corner portion of the U-shaped frame 29 so that the stopper 25 does not move in the width direction of the lightweight pulley 1. And the fastener 25 at the time of fastening.
Improves stability.

The light pulley 1 according to the present invention has the above-mentioned structure, and as shown in FIG.
Are arranged at predetermined intervals, a joist 35 is arranged on the lightweight pulley 1 in an arrangement orthogonal to the lightweight pulley 1, a slab form 36 is laid on the joist 35, and then placed on the form 36. If concrete is laid in a straight line, an upper floor slab can be constructed.

The light weight puller 1 is made of a metal plate.
The upper and lower edges of the two large pulling members 5, which are formed by coupling bent portions 3 and 4 bent to the same surface side, are fixed back-to-back at the portion of the back plate 2, so that even if the length is increased, the weight is reduced. It has excellent bending strength and can reliably support the weight of cast concrete.

In the embodiment shown in the figure, the light weight puller 1 has two puller members 5, 5 fixed back to back.
When using in a part with a small load, one large pulling member 5
Can be used alone as it is, and in this case, the end of the light-weight pulley may be processed by the end fitting 7 shown in FIG.

[0030]

As described above, according to the present invention, the bent portions bent to the same surface side are formed on the upper and lower edges of the back plate to form a light-weight pull-out, so that the bending strength is improved by the upper and lower bent portions. By using a thin metal plate, the weight can be reduced, the strength is excellent, the handling is easy, the workability is excellent, and the cost is low.

Since the two large metal members are fixed back-to-back at the back plate to form a lightweight bar, the back plate and the upper and lower bent portions make it longer. However, it is lightweight, further improves bending resistance and impact resistance, and can support a large load.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment of a lightweight pulling machine.

FIG. 2 (A) is a front view of a main part showing a second embodiment of a lightweight pulley, and FIG. 2 (B) is a longitudinal sectional view of the same.

FIG. 3 (A) is a front view of a main part showing a third embodiment of a lightweight pulley, and FIG. 3 (B) is a longitudinal sectional view of the same.

FIG. 4 (A) is a front view of a main part showing another example of the third embodiment of the light and heavy pulling machine, and FIG. 4 (B) is a longitudinal sectional view thereof.

FIG. 5 (A) is a front view of a main part showing still another example of the third embodiment of the lightweight pulley, and FIG. 5 (B) is a longitudinal sectional view of the same.

FIG. 6 is a perspective view of a main part showing a fourth embodiment of a light and heavy pulling machine.

FIG. 7 is a plan view showing a state when the above is used.

FIG. 8 is a front view of the same.

FIG. 9A is a front view of a main part cutaway showing a fifth embodiment of a lightweight pulley, and FIG. 9B is a longitudinal sectional view of the same.

FIG. 10 is a vertical cross-sectional view showing a state of slab construction using light weight pulling.

FIG. 11 is an enlarged front view showing a use state of the large undertaking bracket.

FIG. 12 is an enlarged front view showing a use state of the metal fastener.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light weight pulling 2 Backboard 3, 4 Bending part 5 Pulling member 8 Horizontal part 9 Vertical part 10 Inward part 11 Rib

Claims (5)

[Claims] 1. A horizontal plate which is bent from the upper and lower edges of the back plate to the same surface side at upper and lower edges of a horizontally long strip-shaped back plate using a metal plate. And a vertical portion bent at a right angle inward from the tip of the horizontal portion toward the inside, and an inward portion bent at a right angle from the tip of the vertical portion toward the backboard side. Pull. 2. A horizontal plate which is bent from the upper and lower edges of the back plate to the same surface side at the upper and lower edges of a horizontally long back plate using a metal plate. Portion, a vertical portion bent at right angles inward from each other from the tip of the horizontal portion, and two inward portions bent at right angles toward each other from the tip of the vertical portion toward the backboard side. Lightweight pulling with the pulling member fixed back-to-back at the back plate. 3. A horizontal plate which is bent from the upper and lower edges of the back plate to the same surface side at the upper and lower edges of a horizontally long strip-shaped back plate using a metal plate. Portion, a vertical portion bent at right angles inward from each other from the tip of the horizontal portion, and two inward portions bent at right angles toward each other from the tip of the vertical portion toward the backboard side. Lightweight heavyweight with large members fixed back-to-back at the back plate with a spacing member in between. 4. The lightweight pulling pulley according to claim 2, wherein the two pulling members are fixed back-to-back at the back plate portion so that a step in the length direction occurs at the end. 5. The light-weight pulling device according to claim 1, wherein a reinforcing rib is provided on a back plate of the pulling member.