JPS6016545B2 - extruded aluminum beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to extruded aluminum beams, and more particularly to aluminum beams used as longitudinal members in support structures for concrete forming.

Support structure for concrete forming (comretebmi)
ngstmctmes) are used to support formwork or construction components when forming concrete structures, both horizontally, such as apartment floors, and vertically, such as walls and tunnel liners. be.

Generally, horizontal support is provided by a second support member such as a joist or beam that directly supports the concrete form, and this joist or beam is supported by a first support member such as a truss or strong beam supported by vertical supports. It is supported by supporting material.
Vertical support is also provided by strong longitudinal beams (sVo
woles that support a plurality of joists or vertical boards supported by a first support member such as
The concrete formwork is supported by a second support member such as. In either direction of support, the second support that directly supports the concrete formwork is often fixed to the first support, and in particular the entire concrete forming support structure can be moved from the first working position to the second support. It is particularly preferable to do this when using a crane or the like to move the workpiece to the working position. In cases where it is preferable to use heavier concrete than usual, such as in parking lots or large-scale factories, multiple scaffolding frames are assembled under the concrete forming support structure to achieve sufficient load distribution.

By the way, when it is necessary to support a very large weight like this, the formwork has traditionally been supported using very heavy horizontal and vertical members made of wood or steel, but these members inevitably Because they are large and extremely heavy, it is difficult to physically handle them and transport them while moving the hawk, and it is therefore necessary to spend a great deal of time and effort to transport these parts. there were. The present invention is an extruded aluminum beam having a uniform cross-section over its length, comprising a top, a web portion, and a base, the top having a bottom wall, side walls, and transversely from the top of each side wall. It has a generally U-shaped foundation with an outwardly extending top flange, and the web portion is located approximately centrally below the top and above the base, and has a web portion located approximately centrally below the top and above the base. It is of approximately uniform thickness except at the joint, and the base is provided with a centrally located groove suitable for receiving the head of a bolt, which groove extends in width and height to that of the upper part. Much smaller than the groove above,
A protruding edge extends inward in the fin direction from the lower end of each side wall of the base groove, and a base flange extends laterally outward from the lower end of each side wall, and the entire length of the base flange extends from the lower end of the upper groove. a molded aluminum base, the lower surface of said base flange being slightly concave from end to end along its entire length; In the beam, a downwardly extending protrusion is formed at the outer end of the upper flange extending outwardly in the machine direction of the upper part, and an outer end of each base flange extending outwardly in the transverse direction of the base part is formed. An upwardly extending flange is formed at the end, and the heights of all the upwardly and downwardly extending ridges are approximately equal to each other, and each upper flange extending laterally outwardly of the upper part is formed. The minimum thickness of each proximal flange extending laterally inwardly of the base is greater than the minimum thickness of each proximal flange extending laterally inwardly of the base, and the thickness of each proximal flange extending laterally inwardly of the base is greater than the minimum thickness of each proximal flange extending laterally inwardly of the base. An extruded aluminum beam is provided having a thickness greater than a minimum base flange thickness.

Therefore, an object of the present invention is to provide a beam that has substantially the same weight as a conventional beam, but has dramatically increased strength and moment resistance. Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings, from which further features and advantages of the invention will become apparent.

The beam 10 of the present invention, shown in FIGS. 1 and 2, is an aluminum molding formed under conventional extrusion and manufacturing conditions and has a uniform cross-section throughout its length.

This beam 10 has an upper part 12, a web part 14 and a base part 1.
It is equipped with 6. The top 12 has a generally U-shaped groove 18 with a bottom wall 20 and side walls 22, each side wall 22
It also includes a pair of upper flanges 24, each extending laterally and outwardly from the upper end. The web portion 14 is located approximately centrally below the top portion 12 and above the base portion 16 and has a generally uniform thickness over its entire length except at its connection to the top portion 12 and the base portion 16, 28, 30. It is equipped with

The base 16 is provided in its center with a groove 32 suitable for receiving a bolt head, the groove 32 being considerably smaller in width and height than the groove 18.

The groove 32 is defined by a pair of green sections 34 each extending laterally inward from the lower end of the side wall 36 thereof. From the lower end of each sidewall 36 of groove 32, a pair of base flanges 38 extend laterally outwardly. The overall lateral length of base flange 38 is greater than the overall lateral length of upper flange 24 so that base flange 38 extends more outwardly than upper flange 24 . The lower surface of the base flange 38 is slightly concave from outer end to outer end. Therefore, beam 10
When the bolt is at rest, ie, not under any pressure, the lower surface of the ridge forming the bolt head groove 32 is higher than the lower surface of the outer end of the bottom flange 38. As mentioned above, the beams of the invention must have great strength and sturdiness, and these properties must be considerably greater per unit weight than, for example, wooden or steel beams.

This required property is fully obtained by the beam of the invention, which further comprises: a laterally outwardly extending upper portion 12 of the beam 10; The outer end of each of the upper flanges 24 is provided with a downwardly extending ridge 40, and similarly,
A green portion 42 extending upward is formed at each outer end of the base flange 38 .

The heights of all the downwardly and upwardly extending ridges 40, 42 are substantially equal to each other. The upper surface of the laterally outwardly extending upper flange 24 is generally planar, and this upper surface normally acts as a load receiving surface.

The lower surface of the upper flange 24 has a curved surface 44 as shown in the drawings, but it can also be flat. In any event, the minimum thickness of top flange 24 is greater than any minimum thickness of base flange 38. Similarly, the thickness of the ridge 34 forming the bolt groove 32 is greater than the minimum thickness of the base flange 38.

It has been found that the base flange 38 has a thickness of at most 4 mm, but in the beam of this example, a step 46 is provided at the outer end of the upper surface of the base flange 38, and the outer edge of the base flange 38 is The portion 48 is bent with the same radius of curvature as the curved surface portion 44 of the upper flange 24.

In this way, the same type of clamp can be used for the downwardly extending ridge 40 and the upwardly extending ridge, as described below. When the beam 10 according to the present invention is used primarily as a beam, or when connecting other members to the beam using fastening members driven into wooden beam members, etc., a 1.5 inch x 1 .5 inch (
Push the wooden insert 54 (31 sides x 31 skins) into the groove 18.

To assist in securing the insert, particularly to limit upward movement, the side wall 22 of the upper groove 18 may be provided with teeth 50 on one or both inner surfaces. The wooden insert 54 may be driven with driveable means, such as screws, and these fastening means 52 can be driven through starting grooves or recesses 56 formed in one or both outer surfaces of the side wall 22. The beam of the present invention having the above characteristics has a standard overall height of 7.5 inches (19 yards) and an overall width at the base of 5 inches.
．． 0 inches (127 willow), total width of top flange 3.87
Physically represented by a beam with a 5 inch (98.4 side).

This beam, even with a 1.5" x 1.5" wood insert, is 5.21b/ft (7.7k9/m
), but the dry weight willow lb/ft (44.
It has a moment of resistance equal to a 12 inch by 12 inch spruce member of 65k9/m). 1974 King 1
The beam disclosed in U.S. Pat.
EAM), the coefficient of inertia in the horizontal axis (kx) is 10445 inches 4 (685 skin 4
), the beam of the present invention is 34.06 inches 4 (1
417 arc 4 ), and the inertia factor in the longitudinal axis (IW) is 4.72 inch 4 (1
96 skin 4).

This "ALMA BEAM" weighs 4.01 b/ft (
6.0k9/m), and the total height is 6.5 inches (1
65 wind), the overall width at the base is 5.0 inches (127 ribs), and the overall width at the top flange is 3.2 inches (80 ribs). Therefore, although the weight has only increased by about 30%, the x and lyy are much larger.The following comparative data on strength and robustness show that the beam of the present invention has
It can be seen that although the toughness is increased by about 100%, the weight is only increased by 30% as mentioned above. Table 1 Comparison of the ALMA Beam and the Beam of the Invention (Based on the Characteristics of the ALMA Beam) Referring now to FIG. Typical examples in use are shown.

The beam 10 is supported from below by other supporting devices such as high-strength scaffolding, struts, etc., typically by a U-shaped head 58 in combination with longitudinal supports 74. The beam 10 is installed in a "standard" U-shaped head commonly found on construction sites, either inverted if the U-shaped head is 4 inches long, or in the orientation as shown if the U-shaped head is 8 inches long. inserted. Also, instead of standing within the U-shaped head, the beam may be fixed to a flat surface using a fastener such as the clamp 62 shown below. A plurality of beams 60 are supported by beam 101, with similar beams spaced along the length of beam 60.

Beam 60 is secured to the lower surface of the beam by a clamp 62 which is secured to the underside of the beam by inserting the bolt head into bolt slot 66 and turning nut 64. The fastening part 68 of the clamp 62 is
A burr or downwardly extending ridge 401 covers the beam 60 and the beam 10 to securely fix the beam 60 and the beam 10 when they are moved together. A pair of clamps 62 may be used on both sides of the beam 10, or only one clamp 62 may be used on one side of the beam. In the embodiment shown in FIG. 3, the sheathing 70 has driveable fastening means driven through the sheathing to a wooden insert 72 that is placed and secured within the top of each beam 60. is fixed by.

If the beam 10 of the present invention is used in the manner shown in FIG. 3, there is no need to insert a web block between the crab extending above the U-shaped head 58 and the weave of the beam. .

As described above, in the extruded aluminum beam according to the present invention, the protrusions 40 and 42 are formed at the outer ends of the upper flange 24 and the base flange 38, respectively, and extend downward and upward and have substantially equal heights. The minimum thickness of the upper flange 24 is larger than the minimum thickness of the base flange 38, and the thickness of the inner protruding edge 34 of the closing part of the bolt groove 32 of the base 16 is formed larger than the minimum thickness of the base flange 38. Compared to conventional aluminum beams, it is about twice as strong with the same or a slight increase in weight, and compared to wooden beams, it is about 1/6th the weight. Approximately equal resistance moments can be obtained.

In addition, since the upper surface of the base flange 38 is bent at the outer end 48 with a radius of curvature that is approximately equal to the outer end 44 of the lower surface of the upper flange 24, the same type of clamp is used for both the upper and lower projections 40 and 42. can be used, etc.
The present invention has an advantageous effect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the beam of the invention, illustrating the features of the invention. Figure 2 shows a bead of the invention with a wooden insert in the upper part.
FIG. FIG. 3 is a perspective view showing an embodiment of the use of the beam in conjunction with other components. 10... Beam, 12... Upper part,
14... Web part, 16... Base, 18...
... Groove, 24 ... Upper flange, 26.
...Web, 28,30...Connection part, 32.
... Bolt foundation, 34 ... Projection, 38 ...
・Base flange, 50... Tooth-like process, 58...
...U-shaped head, 60...Beam, 62...
... Clamp, 54, 72 ... Wooden insert. F to I FIG

Claims (1)

[Scope of Claims] 1. An extruded aluminum beam having a uniform cross-section over its entire length and having a top portion, a web portion, and a base portion, the top portion having a bottom wall, side walls, and each side wall. a generally U-shaped groove with a top flange extending laterally outwardly from the top of the sidewall; the web portion being generally centrally located below the top and above the base; , of approximately uniform thickness except at the top and at its connection to the base; the base is provided with a centrally located groove suitable for receiving the head of a bolt, which groove has a width and substantially smaller in height than the upper groove, with a tongue extending laterally inwardly from the lower end of each sidewall of the base groove and a base flange extending laterally outwardly from the lower end of each sidewall. , the total length of the base flange is longer than the total length of the upper flange extending laterally outwardly from the upper end of each sidewall of the upper groove, and the lower surface of the base flange of the base extends along its entire length from the end. In a shaped aluminum beam that is slightly concave to the end, a downwardly extending ridge is formed at the outer end of the upper laterally outwardly extending upper flange, and An upwardly extending ridge is formed at the outer end of each of said laterally outwardly extending base flanges; the heights of all said upwardly and downwardly extending ridges are approximately relative to each other. equal; the minimum thickness of each laterally outwardly extending top flange of the top is greater than the minimum thickness of each laterally outwardly extending base flange of the base; each laterally inwardly extending top flange of the base; An extruded aluminum beam characterized in that the thickness of the flange is greater than the minimum thickness of each base flange extending outwardly from the base. 2. The extrusion according to claim 1, wherein a plurality of tooth-like protrusions extending inwardly and downwardly are formed on a portion of at least one side of the groove in the upper part of the beam. Molded aluminum beam. 3. The extrusion molding according to claim 1, wherein the lower surface of each of the laterally outwardly extending upper flanges of the upper portion is curved, and the upper surface thereof is substantially planar. aluminum beam. 4. The upper surface of the base flange extending laterally outward of the base is bent at its outer end with a radius of curvature approximately equal to the outer end of the lower surface of the upper flange extending laterally outward of the upper part. The third claim characterized in that
Extruded aluminum beams as described in Section.