JPS5911525Y2 - Assembly fittings for heavy temporary gantry - Google Patents

Description

[Detailed explanation of the invention] This invention utilizes steel frames such as H-shaped steel piles and channel-shaped horizontal members to construct heavy temporary structures such as truck entry platforms or trolley piers for the entry of transport vehicles and heavy equipment. This relates to assembly fittings for heavy temporary trestles used when assembling trestles, and is particularly provided for joining channel steel and angles parallel to the flange sides of steel piles.

Traditionally, the metal fittings used in this type of application were
No. 94013 is available, but since a channel-shaped horizontal member is installed on one side flange of a steel frame pile, concentrated stress acts on that one side flange, which tends to cause deformation of the flange.

Furthermore, in this type of application, the horizontal load is normally designed to be 20% of the vertical load of the gantry, so it is necessary to connect the steel piles and channel-shaped horizontal members with considerable tightening force. However, when the above-mentioned method is adopted, if the groove-shaped horizontal member is strongly tightened in the web direction, the seven flange of the groove-shaped horizontal member will bend inward, and the web will deform outward.

For this reason, sufficient tightening force cannot be obtained, and at the same time, since the tightening direction for this groove-shaped horizontal member is parallel to the axis of the steel pile, the bonding force between the two is weak, and force transmission is poor.

Additionally, upper and lower connections are required to stop the metal fittings from rotating in the direction of the reaction force.

Therefore, it is necessary to attach it to the steel frame pile after connecting the upper and lower parts, which is inefficient in terms of construction and increases the size of the mold.

Furthermore, with this type of fitting, the groove-shaped horizontal member can only be joined to the steel pile in the orthogonal direction, and the groove-shaped horizontal member cannot be used as a diagonal member, that is, a place member, and also during construction. It takes a lot of time and effort, and is not sufficient in terms of safety and workability.

In addition, the connecting fitting according to Utility Model Publication No. 39-17032 does not have any reaction wall against the tightening force on the axis of the tightening bolt that tightens the cross beam, so if it is tightened with the strong tightening force as mentioned above, the support The metal fitting itself rotates around the hook-shaped tightening bolt that tightens it, and it is extremely difficult to adapt this type of metal fitting to the heavy temporary gantry as in this invention.

The assembly fitting of this invention was made to solve the above-mentioned drawbacks and problems of the conventional art. Next, the assembly fitting of this invention will be explained based on the drawings of the embodiments.

In Figures 1 and 2, 1 is a channel steel C on the inner upper surface.
3 is a supporting part having a vertical supporting groove 4 at its base end 1a, facing inwardly from the front and rear outside on a common axis a-a. Female threaded portions 5, 5 are provided.

Reference numerals 6 and 6 designate tightening bolts with protrusions at the tips that are screwed into the internally threaded parts 5 and 5 and tightened against the flange of the steel pile A housed in the clamping part 3. It can be tightened strongly with a strong biting force.

Reference numeral 7 denotes a female threaded portion provided at the tip 1b of the main body 1 with a space 8 for supporting the back of the web near the flange side of the channel steel C, and its axis b-b is It is located appropriately above the upper surface of the metal main body support part 2 and parallel to the axis a-a of the tightening bolt of the clamping part 3 in a plane.

Numeral 9 is a tightening bolt with a protrusion at the tip that is screwed into this female threaded portion 7 and tightens the channel steel C placed on the metal main body support portion 2. Like the aforementioned tightening bolts 6, 6, it is a tightening bolt with a high tension bolt. It can be strongly tightened with effective biting force against steel materials.

In addition, as shown by the chain line in FIG.
It is also easily possible to attach a place mounting piece 1C below.

Reference numeral 10 denotes a reaction wall surface provided on the winding portion 3 of the steel frame pile on the proximal end side of the metal fitting main body 1 that faces the tightening bolt 9 on the axis bb.

When using the assembly fitting of this invention with the above structure, as shown in Figs. 1a, the clamping groove 4 of the clamping part 3 is fitted, and the tightening bolts 6, 6 are tightened from the front and back with a predetermined tightening torque to fix the metal fitting main body 1, and in this state, the metal fitting main body 1 is fixed on the supporting part 2. A channel steel C is placed between the tightening bolt 9 and the reaction wall surface 10 in such a manner that the channel steel C is parallel to the flange side of the steel pile with its flange tip side facing the steel pile A, Further, a tightening bolt 9 is tightened to a predetermined torque from the tip 1b of the main body of the metal fitting to join them.

Furthermore, to the other flange of the steel frame pile A, attach the metal fitting main body 1 from above to the other side of the channel steel C, which has been previously joined with one metal fitting, in the same manner as above, and then tighten it from the tip 1b of the metal fitting main body 1. It is mounted diagonally by tightening bolts 9.

The angle of this channel steel C with respect to the steel frame pile A can be set horizontally as shown in FIG. 5, or in an inclined direction within a certain range.

Furthermore, it is also possible to easily attach the metal fitting main body 1 to one flange A1 of the steel frame pile A in advance, then place the channel steel C and tighten it with the tightening bolt 9 at the tip of the metal fitting main body. .

The assembly fittings of this invention are not only used for assembling the intersection of H-section steel and channel steel as explained above, but also for the assembly of the intersection of H-section steel and L-section steel as explained next. It can also be applied.

The space 8 mainly consisting of the metal fittings is narrowed as shown in Fig. 6 to create an angle L.
It is also possible to support the flange horizontally or in an inclined direction; in this case, as shown in Figure 7, the steel frame pile A
After installing the angle L horizontally near the top of the gantry and placing the large lumber D of the gantry (H-beam steel, etc.) on the top surface, support the angle L and the lumber D with the clamp fitting E and assemble. You can also do it.

FIG. 8 shows an embodiment of this invention using an assembly metal fitting, in which a reaction wall surface 1 facing the tightening bolt 9 of the main body tip portion 1a of the metal fitting is shown.
0 is supported by the clamping part 3 on the flange A of the steel frame pile A.
This is a case where it is constructed on the same plane as one side.

In this case, as shown in FIG. 9, the flange of the channel steel C (or angle) can be brought into direct contact with the end face of the steel frame pile A, so the channel steel C or angle When accepting L, the operation is easy.

Note that the drawings showing each embodiment of this invention are examples in which the supporting portion 3 is provided with tightening bolts 6, 6 facing each other on the same axis a-a.

When one of the tightening bolts is removed and a supporting member 3' having a receiving surface 11 with a tip projection is installed at that location (first
0) can also provide the same effect.

FIG. 11 shows another embodiment of the reaction wall surface in the assembly fitting of this invention, in which the reaction wall surface 1 is protruded from the flange side of the steel pile supported by the supporting part 3 with the required wall thickness and area.
0 is provided with a receiving surface 12 with a tip projection at the center or on both left and right sides.

FIG. 12 also shows another embodiment of the reaction wall surface in the assembly fitting of this invention, in which the reaction wall surface 10, which is formed on the same plane as the flange side of the steel pile to be supported, in the supporting part 3,
A receiving surface 12 with a protrusion at the tip is provided, and in any case, the degree of connection between the steel pile and the channel steel (or angle) can be further improved compared to the above-described embodiments.

Because the assembly fittings of this invention are constructed and used as described above, they are less dangerous than those made by welding or bolting, and quality control can be performed accurately by tightening with a constant tightening torque. , labor saving and rationalization are realized.

Furthermore, during dismantling, there is no loss of material at the end of the steel material, and there is no fear of cross-sectional damage to the steel material, making it economical.

In particular, the following effects can be expected with the assembly fitting of this invention.

(a) Since the channel steel can be joined to the flange on one side of the H steel pile using a pair of metal fittings, the stress applied along the axis of the channel steel is dispersed, compared to when it is attached to a flange on one side.
Reasonable construction is possible with fewer metal fittings.

(b) Since the tightening direction of the channel steel to the H steel pile is perpendicular to the pile, a higher tightening force can be obtained compared to the conventional method of tightening in parallel along the pile. The degree of bonding with steel piles is also further improved.

(c) Orthogonal and oblique joining of steel materials can be easily and reliably performed, and can be used for a wide range of applications.

(2) The reaction force caused by tightening with a strong tightening force is reliably supported by the reaction wall surface, and there is no fear that the main body of the metal fittings will rotate as in the conventional case, and a higher joining force can be obtained.

(e) It is practically useful because it can be made smaller than conventional ones, and it is easy to construct and handle.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the assembly fittings of this invention. FIG. 2 is a side view of the same as above. FIG. 3 is a side view showing the state of use of the same as above. FIG. 4 is a partially cutaway plan view of the device in use. FIG. 5 is a perspective view of the device in use. FIG. 6 is a side view of the device in use when tightening an angle using the assembly fitting of this invention. FIG. 7 is a perspective view showing another usage state of the same as above. FIG. 8 is a perspective view of an embodiment of this invention using assembly fittings. FIG. 9 is a partially cutaway plan view of the same as the above in a state of use. FIG. 10 is a sectional view of a main part in the case where one of the clamping bolts of the clamping part in the assembly fitting of this invention is made into a receiving surface with a tip projection. FIGS. 11 and 12 are sectional views of main parts showing other embodiments of the reaction wall surface in the assembly fitting of this invention. 1...Bracket main body, 3...Holding part, 5,
5 and 7...Female thread part, 6, 6 and 9...
... Tightening bolt, 10 ... Reaction wall surface, 11.1
2...Socket surface with tip projection, A...Steel pile, C...Channel steel, L...Angle,
D...Oihiki material.

Claims (1)

[Scope of utility model registration request] A supporting part having a vertical supporting groove is provided at the base end of the main body of the metal fitting, which has a supporting part made of channel steel on the inner upper surface, and tightening bolts facing each other on a common axis are screwed into this supporting part. ,
Near the upper surface of the support at the tip of the main body of the metal fitting, there is a space for supporting the back of the web near the flange side of the channel steel or the flange of the angle, and the space is parallel to the axis of the tightening bolt in plane. An assembly fitting for a heavy temporary gantry, comprising a tightening bolt screwed on the axis of the tightening bolt, and a reaction wall surface formed on the proximal end side of the fitting main body facing on the axis of the tightening bolt.