JP3377945B2 - Suspension device for temporary construction - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspending device for temporary construction which can be conveniently used when temporarily constructing a suspending scaffold for repair work under a bridge.

[0002]

2. Description of the Related Art When suspending scaffolding for repair work is temporarily installed under a bridge, chain suspenders are attached to the edge of the bridge at appropriate intervals via U-shaped clamps, and suspended on each chain suspender. A method of suspending a steel pipe in a horizontal direction by a chain that has been lowered is used to suspend a plurality of steel pipes in parallel at the same height and to support the scaffolding plate with these parallel steel pipes. In this case, it is necessary to adjust the suspension length of each suspension chain so that the steel pipes suspended in parallel are at the same level. The only way to do this is to change the locking position of the hook to the chain link.

[0003]

As described above, in adjusting the hanging length of the chain by changing the locking position of the hook attached to the end of the chain with respect to the chain link, the chain length is finer than the pitch of the chain link. Since it is not possible to adjust the suspending length of the steel pipe, even if it is possible to suspend the steel pipes in a substantially horizontal manner with a plurality of chains, it is possible to load a load on the chains that suspend one steel pipe. As a result, such chains and unloaded chains are mixed, and it becomes impossible to temporarily install scaffolds with high safety in which loads are distributed to all chains.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a suspending device for temporary construction which can solve the above-mentioned conventional problems, and its means will be described later. The clamp 1 is composed of a clamp 1, a length adjusting suspender 2 and a chain suspender 3, and the clamp 1 is fitted to the U-shaped body 4 and the U-shaped body 4. The horizontal plate portion (edge portion 28a of the girder beam 28) is formed into the U-shaped main body 4
And a fastening screw 5 fastened on the lower side portion 9 of the clamp 1, and the length adjusting suspending tool 2 suspends the chain suspending tool 3 on the lower side portion 9 of the C-shaped body of the clamp 1, and the screw shaft portion 17 And a long nut 1 for adjusting the length that is screwed into this so as to be relatively rotatable.
8 is a suspending device for temporary construction, comprising:
The adjusting sling 2 is attached to the lower side 9 of the C-shaped body of the clamp 1.
The coupled rod 16 and the lower end spherical bulge of the rod 16.
The upper end is suspended from the head 13 so that it can swing and rotate.
Long nut 18 and a lower end that is screwed into the long nut 18
Part from the screw shaft 17 connected to the chain suspension 3
It is composed of

[0005]

In carrying out the apparatus of the present invention having the above structure,
The chain suspending tool 3 is configured such that both end plate portions 23a and 23b of a U-shaped band-shaped plate are bent inward and overlapped with each other, and the cross section of the U-shaped portion 24 is an arc having a convex curved surface on the inside. The both end plate portions 23a, 23
b can be connected to the lower end of the length adjusting hanger 2.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. In FIG. 1, 1 is a U-shaped clamp, 2 is a length adjusting suspending tool, and 3 is a chain suspending tool. . The U-shaped clamp 1 is composed of a U-shaped body 4 and a fastening screw 5, and the U-shaped body 4 has a convex rib 7 continuous in a U-shape formed by pressing, leaving an overhanging portion 6 on the entire periphery thereof. The upper side portion 8 and the lower side portion 9 are formed with through screw holes 10 and 11 substantially concentrically. The fastening screw 5 is screwed through the through-screw hole 10 of the upper side 8 of the U-shaped body, and a disc spring-shaped pressing plate 12 is rotatably attached to the inner end thereof.

The length adjusting sling 2 has a screw shaft portion 14 having a spherical bulging head 13 integrally formed at the lower end and a lock nut 15.
And a screw shaft 17 and a long nut 18. The long nut 18 has a cylindrical upper end portion 18a on which the spherical bulging head 13 of the shaft rod 16 is attached. It is squeezed so as to come into contact with the spherical bulging head 13, and is suspended so as to swing and rotate about its axis, and a screw hole portion 19 is concentrically formed at the lower end portion. The screw shaft 17 is screwed into the screw hole portion 19 of the long nut 18, and the hexagonal head portion 17a at the lower end is concentrically formed with a screw hole 20 opening to the end face of the head portion 17a. .

In the length adjusting suspension 2, the screw shaft portion 14 of the shaft rod 16 is screwed into the through screw hole 11 of the lower side portion 9 of the U-shaped main body of the U-shaped clamp 1 to lock the lock nut 15.
When the length adjusting sling 2 is attached, it is joined to the lower side 9 of the U-shaped clamp 1 by fastening.
The shaft rod 16 must be rotated with respect to the U-shaped body 4. When the rotation operation angular shaft portion cannot be formed in the shaft portion 16a between the spherical bulging head 13 of the shaft rod 16 and the screw shaft portion 14 due to the rotation operation of the shaft rod 16, as shown in the drawing. ,
Two protrusions 13a, 13 are provided on the lower end surface of the spherical bulging head 13.
It is possible to provide the long nut 18 with a through hole 21 through which the rod for rotational operation is inserted in the diametrical direction so as to fit between the protrusions 13a and 13b. In addition to the through hole 21, the long nut 18 may be provided with a through hole 22 for inserting the rotation operating rod in the diametrical direction when the long nut 18 is rotationally operated.

In the chain hanging device 3, both end plate portions 23a and 23b of a U-shaped strip plate are bent inward and overlapped with each other, and the cross section of the U-shaped portion 24 has a convex U-shaped inside. The screw shaft 17 has a curved arc shape, and a bolt 25, which penetrates the both end plate portions 23a and 23b from the inside to the outside, is screwed into the screw hole 20 of the screw shaft 17 so that the screw shaft 17 Is attached to the bottom edge of.

As shown in FIGS. 2 and 3, the suspension device 26 configured as described above has an edge portion 28a of a girder 28 of a bridge, for example, when a suspension scaffold 27 for repair work is temporarily installed under the bridge. Attached to. That is, the U-shaped body 4 of the U-shaped clamp 1 is laterally externally fitted to the edge portion 28a of the beam girder 28, and the fastening screw 5 is tightened from above, so that the pressing plate 12 at the lower end and the lower side portion 9 of the U-shaped body are connected. The edge portion 28a of the girder beam 28 is sandwiched between them to fix the U-shaped clamp 1. Then, the suspending chain 29 is inserted into the U-shaped portion 24 of the chain suspending tool 3, and the steel pipe 30 is suspended by the chain 29 by a conventionally known method. In this way, the steel pipe 30
A plurality of positions in the length direction of the steel pipe 30 suspended by the suspension device 26 and the suspending chain 29 in a substantially horizontal manner, and the steel pipe 30 suspended in a substantially horizontal manner on the other girder beam 28 in the same manner. The scaffolding plate 31 is supported in a substantially horizontal shape, and the suspended scaffolding 27 for repair work is used.
Is temporarily installed.

During the temporary work of the suspension scaffold 27,
The suspension length of the suspending chains 29 suspended by the suspension devices 26 is adjusted as is conventionally known so that the steel pipes 30 can be suspended substantially horizontally at substantially the same height. Furthermore, the hanging length of the length adjusting hanger 2 in each hanging device 26 is adjusted so that the load acts on the plurality of hanging chains 29 for hanging one steel pipe 30 substantially evenly. That is, by rotating the long nut 18, the screw shaft 17 that suspends the chain suspending tool 3 is attached to the long nut 1.
By vertically moving with respect to 8, the suspension length between the U-shaped clamp 1 and the chain suspension 3 can be finely adjusted. Of course, when a horizontal force is applied to the suspension scaffold 27, the length adjustment suspension 2 and the chain suspension 3 are attached to the U-shaped clamp 1 (U-shaped body 4) of the suspension device 26.
Together with the hanging chain 29 together with the U-shaped clamp 1
Since it is possible to freely swing in the acting direction of the external force with respect to the spherical bulging head 13 of the shaft rod 16 located directly below the (U-shaped body 4), it is necessary to exert an unreasonable bending force on the suspension device 26. There is no.

The length adjusting suspension 2 has a fixed screw shaft connected to the U-shaped clamp 1 side, a screw shaft connected to the chain suspending device 3 side, and screw holes at both ends of both screw shafts. It may be of a turnbuckle type, which is composed of a long nut screwed at the same time.

[0014]

As described above, according to the suspending device of the present invention, the suspending length between the chain suspender suspended by the clamp and the clamp is the length interposed between the two. Fine adjustment can be performed by relatively rotating the long nut of the adjusting sling with respect to the screw shaft. In other words, when suspending a plurality of scaffold-supporting steel pipes in the length direction through the suspending device and the suspending chain, the suspending length of the suspending device for adjusting the length of each suspending device is set as described above. You can make fine adjustments like this so that each hanging device acts on the hanging chains in the same way, so that all hanging chains can work effectively and a highly safe lifting chain can be used. The scaffold can be easily installed temporarily.

Further, according to the structure of the present invention, in the spherical bulging head located at the upper end portion of the length adjusting hanging device, the length adjusting hanging device and the chain hanging device are integrated in any direction. Since the swinging motion can be performed, it is not necessary to apply an unreasonable bending force to the middle of the suspension device when an external force in the horizontal direction is applied to the suspended scaffolding, and the safety can be further enhanced.

According to the second aspect of the invention, the chain suspending tool can be constructed of an iron plate at a low cost, and the suspending chain is not overloaded and the safety is improved.

[Brief description of drawings]

FIG. 1 is a front view of the suspension device, and FIG. 1B is a vertical side view of the suspension device.

FIG. 2 is a side view showing a usage example of the suspension device.

FIG. 3 is a front view showing the same usage example.

[Explanation of symbols]

1 U-shaped clamp 2 Length adjustment suspenders 3 Chain suspension 4 U-shaped body 5 fastening screws 13 Spherical bulging head 14 Spiral shaft 15 Lock nut 16 Axle 17 screw shaft 18 long nuts 19 Screw hole 20 screw holes 24 U-shaped part 26 Suspension device 27 Suspension scaffolding for repair work 28 Bridge girders 28a Edge part of girder beam 29 Hanging chain 30 steel pipe 31 scaffolding board

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) E04G 3/10 F16B 7/06 F16G 11/12

Claims (2)

(57) [Claims] 1. A clamp comprises a clamp, a length adjusting suspender, and a chain suspender, wherein the clamp has a U-shaped body and a horizontal plate portion fitted to the U-shaped body at a lower side portion of the U-shaped body. The length adjusting suspending tool is configured to suspend the chain suspending tool on the lower side portion of the U-shaped body of the clamp, and is screwed so as to be rotatable relative to the screw shaft portion. Suspension device for temporary work with long nut for length adjustment
And the length adjusting hanger is the lower side of the U-shaped body of the clamp.
The shaft rod connected to the shaft rod and the lower end spherical bulging head of the shaft rod.
A long nut whose upper end is oscillated and can be rotated.
And the lower nut is threaded into the long nut
Suspension device for temporary work, consisting of a screw shaft connected to a barb . 2. The chain hanging tool is a band bent in a U shape.
If both end plates of the plate are bent inward and overlapped with each other
In both cases, the U-shaped section has an arc with a convex curved surface on the inside.
The end plate portions of the length adjusting sling
The suspension device for temporary construction according to claim 1, wherein the suspension device is connected to a lower end .