JPH0448275Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Field of industrial application) This invention relates to a clamp hanger used for temporary installation of hanging scaffolds or safety nets used in construction works such as bridge construction and elevated roads. be.

(Prior Art) For example, in elevated expressways and large-scale bridge construction works, clamp hangers equipped with hanging chains are often used to temporarily install suspended scaffolds for work. This clamp hanger has a U-shaped upper edge 1 of a clamp body 1 as shown in FIG.
A is provided with a fastening bolt 2 having a seat plate 2a, a hanging ring 3 is attached to the lower edge 1b, and a chain 4 is connected to the hanging ring 3.

If this is to be clamped, as shown in Figure 4, the main girder of the temporary bridge, or H
A tightening bolt 2 is tightened and clamped to a flange 5 of a type steel or I-type steel, and the scaffold is suspended using a hanging chain 4 to form a so-called suspended scaffold.

(Problems to be solved by the invention) By the way, according to this conventional clamp hanger, the lower end seat plate 2a of the tightening bolt 2 attached to the upper edge 1a of the clamp fitting main body 1 constituting the clamp hanger and the lower edge 1b, it is very easy to attach and detach by simply engaging the flange 5, tightening the tightening bolt 2, and tightening it back. However, it has the following problems. .

In other words, the tightening of the tightening bolt 2 when clamping varies depending on the operator. Generally, the tightening torque is
Although 350 to 400 kg/cm ² is considered appropriate, for safety reasons, it tends to be over-tightened, which may deform the seat plate 2a attached to the lower end of the tightening bolt 2.
The upper edge 1a and the lower edge 1b of the clamp body 1 tend to deform downward, especially the lower edge 1b.

As a result, the fastening force, ie, the clamping force, on the flange 5 tends to be weakened.

If vibrations or impulses associated with construction work are applied thereto, there is a risk that the clamp fitting body will separate from the mounting portion of the flange 5. Further, when subjected to vibrations or shocks, the tightening bolts themselves loosen, compounding the above-mentioned tendency, creating a safety problem.

Furthermore, since the hanging load applied to the clamp hanger is directly applied to the lower edge 1b of the U-shaped clamp fitting main body 1, the lower edge 1b is subjected to the effect of bending downward.

In other words, the point of application of the clamping force by the tightening bolt 2 and the load point of the hanging load are on the same axis, and the hanging load acts downward in the opposite direction to the clamping force, so that the seat plate 2a of the tightening bolt of the clamp fitting body 1
The clamping force on the flange 5, which is engaged between the lower edge and the lower edge, is weakened.

As mentioned above, if the vibrations and shocks associated with the construction work are applied thereto, the clamp hanger itself is at risk of coming off from the attachment part of the flange 5, which is very unsettling. In any case, conventional clamp hangers have a structure in which the point of application of the clamping force by the tightening bolt and the load point of the hanging load are on the same axis, so the tightening torque of the tightening bolt is adjusted to the appropriate torque. Even if the clamp is firmly tightened, there is a structural problem in that the clamp fitting itself may separate from the mounting part if the hanging load is large or if vibration or shock is applied.

Therefore, the present invention was devised for the purpose of solving the problems of conventional clamp hangers and providing a safer clamp hanger for supporting the load of suspended scaffolding and the like.

(Means for solving the problem) The feature of this means is that the clamping bodies are placed opposite to the upper and lower edges of the U-shaped clamp body, and one of the clamping bodies is The attachment body is attached so that it can be screwed freely, and a lever is also incorporated into the clamp body, the upper end of this lever is linked to the fastening body attached to the upper edge of the clamp body, and the lower end is equipped with a lever for hanging load. Connect the chains of
The structure is such that when a hanging load is applied, the load acts downward on the fastening body at the upper edge.

In other words, the hanging load is applied downward via the lever to the clamping body attached to the upper edge of the U-shaped clamp body so as not to have a negative effect on the clamping force of the clamp body. It is characterized by having the following configuration.

In particular, a circular cam is formed at the tip of the upper end of the lever as a means for linking the upper end of the lever to the fastening body on the upper edge of the clamp body, and the clamping body has this circular cam attached to the upper edge. The lever is linked by being brought into contact with the upper end of the lever, or the tip of the upper end of the lever is linked by being integrally connected to a fastening body attached to the upper edge of the clamp fitting main body. It is. Furthermore, the clamping body is attached to the clamp body through a cushioning material, so that the clamping body itself has a cushioning property.

(Function) As mentioned above, in the present invention, the clamping body attached to the upper edge of the U-shaped clamp body is configured so that the hanging load acts downward, so the clamping force is reduced. That is, the clamping force applied by the fastening bodies attached to the upper edge and the lower edge does not act in a direction that reduces the clamping force.

Therefore, even if vibrations or shocks caused by construction work are applied to the clamp portion, the raku-kump hanger itself is not affected by the vibrations or shocks, and is extremely safe. In addition, since the clamping body is attached to the U-shaped clamp fitting body via a cushioning material, even if vibrations or shocks are applied to the clamp part as described above, the vibrations or shocks will be absorbed by the cushioning material. It is safe and there is no need to worry about the clamp coming off.

(Example) Next, the present invention will be described in more detail based on an example.

First, in the embodiment of the present invention, the U-shaped clamp body is composed of two U-shaped plates 11a, 11b, as shown in FIG. 12a and lower edge 12
Blocks 14a and 14b for mounting the clamping bodies 13a and 13b are interposed at the tip of the clamp body 13b, and the clamp body 11 is integrally connected to the clamp body 11 in a U-shape.

The fastening bodies 13a and 13b are respectively assembled into the blocks 14a and 14b, and in FIG.
is mounted with some play h in the vertical direction, as shown in FIG. The lower fastening body 1
3b is a cushioning material 1 in the part corresponding to the bolt head.
5 and a receiving block 16 is fitted thereon.

In the embodiment shown in FIG. 3, contrary to the case shown in FIG. It has a structure in which a block 16 is attached to the lower end.

Next, the lever 1 to be attached to the clamp fitting body 11
7 has the same shape as shown in FIG. Support, this support shaft 19
The lower end portion 17b is mounted so as to be tiltable in the vertical direction using the lower end portion 17b as a fulcrum.

When the lever 17 is pushed down using the support shaft 19 as a fulcrum as shown in FIG. The structure is such that it can come into contact with the upper end of the fastening body 13a and press and lock the fastening body 13a itself downward.

That is, using the lever 17 as a lever, the fastening body 13a
It is configured to press downward. Next, a chain 20 for lifting a load is connected to the lower end of the lever 17,
This chain 20 is used to suspend scaffolding and the like. In FIG. 2, 22 is a lock pin for locking the lever 17 to the U-shaped clamp body 11, and 23 is a hole into which the pin 22 is inserted.

In addition, in the embodiment shown in FIG.
7 connects its upper end 17a to the clamp fitting main body 11
The upper end portion 17a is inserted between the U-shaped plates 11a and 11b constituting the U-shaped plate members 11a and 11b, and the tip of the inserted upper end portion 17a is integrally connected to the upper fastening pair 13a.

That is, when a hanging load is applied to the chain 20 connected to the lower end of the lever 17, the hanging load acts downwardly on the upper fastening body 13a through the lever 17.

Note that the pins 21 and 21, 21 shown in FIG.
are implanted on both sides of the upper end 17a of the lever 17, and are attached to the vertical portion 12c of the clamp fitting main body 11.
It has the role of a guide pin to restrict the lever 17 from sliding only in the vertical direction along both side edges of the lever 17.

Next, to explain how to install this clamp hanger, firstly, the fastening body 13 which can be screwed in freely.
a to 13b, then apply the flanges to be installed between the upper and lower fasteners 13a and 13b in the conventional manner, and then tighten the screwable fasteners 13a or 13b to the flanges. Clamp it.

Next, in the case of FIG. 1, the lever 17 is pushed down. In this case, the cam 1 is attached to the tip of the lever 17.
8, the cam 18 is locked in a state in which it abuts the upper end of the upper fastening body 13a and applies a downward pressing force.

A hanging scaffold is temporarily installed using a chain 20 for hanging loads connected to the lower end 17b of each lever 17.

(Effects of the invention) As explained above, the present invention has a structure in which the hanging load does not directly affect the clamping force of the fastening bodies 13a and 13b, so it is different from the conventional clamp hanger. In comparison, its safety is extremely high and it can be used with confidence as temporary equipment such as suspended scaffolding.

In other words, the hanging load of scaffolding, etc. is applied to the clamp body through the lever, but the lever abuts or connects to the clamping body attached to the upper edge of the U-shaped metal body that constitutes the clamp hanger. Therefore, it acts as a downward pressing force or a load, and does not weaken the clamping force due to the hanging load as in the conventional case. Moreover, since the screw-in type fastening body is filled with cushioning material, it is not affected by vibrations, shocks, or repeated loads associated with construction work, and the fastening body will not loosen.

Therefore, unlike conventional clamp hangers, there is no need to worry about screws coming loose or falling off due to over-tightening during clamping, and the clamp hanger can function as an extremely safe clamp hanger.

[Brief explanation of the drawing]

The figures show an embodiment of the clamp hanger according to the present invention. Figure 1 is a perspective view showing the clamp hanger clamped to the flange of an H-shaped steel, Figure 2 is a vertical side view of the clamp hanger, and Figure 3 is a vertical side view of the clamp hanger. 4 is a perspective view showing a clamp hanger according to another embodiment clamped to a flange of an H-shaped steel, and FIG. 4 is a perspective view showing a conventional clamp hanger clamped to a flange of an H-shaped steel. 11... Clamp fitting body, 11a, 11b...
... U-shaped plate material, 12a ... upper edge, 12b ... lower edge, 12c ... vertical part, 13a, 13b ... fastening body, 14a, 14b ... block, 15 ... cushioning material, 16 ... ...Receiving block, 17...Lever,
17a... Upper end of lever, 17b... Lower end of lever, 18... Cam, 19... Support shaft, 20... Chain, 21... Pin, 22... Lock pin, 23...
...pin hole.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. Clamping bodies are placed opposite to the upper and lower edges of the U-shaped clamp body, and one of the clamping bodies is attached so that it can be screwed freely. Furthermore, a lever is built into the clamp body, and the upper end of this lever is linked to the clamping body attached to the upper edge of the clamp body, and the lower end is connected to a chain for lifting loads, so that the lifting load is 1. A temporary clamp hanger for a hanging scaffold, etc., characterized in that when a load is applied, the load acts downwardly on a fastening body attached to the upper edge through a lever. 2. The scope of the utility model registration claim, characterized in that a circular cam is formed at the tip of the upper end of the lever, and this circular cam is brought into contact with and linked to the upper end of the fastening body attached to the upper edge of the clamp body. A temporary clamp hanger for hanging scaffolding, etc., as described in item 1. 3. The suspended scaffolding as set forth in claim 1 of the utility model registration claim, characterized in that the tip of the upper end of the lever is integrally connected and linked to a fastening body attached to the upper edge of the clamp body. Temporary clamp hanger. 4. A clamp hanger for temporary construction such as a hanging scaffold as set forth in claim 1 of the registered utility model claim, characterized in that the clamping body is attached to the clamp fitting main body via a cushioning material.