JPS6214271Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a clamping device for temporary construction work that can be conveniently used when suspending temporary work scaffolding, safety nets, and other members from steel structures at construction sites. .

This type of clamp device is a conventionally known so-called U-shaped clamp device in which a screw-type clamp is attached to one leg of a U-shaped main body and the other leg to clamp a member to be attached, such as the U-shaped clamp device. A hanging fixture or a threaded shaft for attaching other components (hereinafter abbreviated as "screw shaft, etc.") may be attached to an appropriate part of the clamp device described in Publication No. 55-76337, for example, on the outside of the other leg. However, if this screw shaft, etc. is simply fixed by welding, etc., if the direction of load during use is oblique to the axial direction of the screw shaft, etc., bending force will be applied to the screw shaft, etc. There is a risk that the welded part may be deformed or broken due to concentration of bending stress on the welded part, so the screw shaft etc. must be mounted so that it can swing within a certain range in any direction 360 degrees.

A conventionally known so-called U-shaped clamp device in which the screw shaft and the like are swingably attached is known, for example, from Japanese Utility Model Publication No. 56-34700. In this device, a so-called universal joint with two fulcrum shafts orthogonal to each other is used as a means to enable the hanging iron, which corresponds to the screw shaft, etc., to swing in any direction 360 degrees, so the number of parts is reduced. There are many parts, which makes the structure complicated and increases the cost. Of course, in this known example, a ball joint is used in addition to the means for making the hanging iron swingable in any direction 360 degrees, and this ball joint is used as a means for attaching the screw, etc. Although it is possible to do so, in either case, the number of parts would be large and the structure would be extremely complicated. Moreover, in the structure of this known example, the member to be attached is held between the inner end of the ball joint, which swings in the tensile direction and becomes oblique, and the screw type clamp, so it is stable against the member to be attached. Moreover, it is unsuitable as a clamping device for temporary construction work that needs to be firmly attached.

The present invention proposes a clamping device for temporary construction work that can solve the above-mentioned conventional problems.

An embodiment of the present invention will be described below based on the illustrative drawings. In FIGS. 1 and 2, 1 is a U-shaped main body, and the strip plate is bent into a U-shape, and the both sides of the main body are bent. It is manufactured by press working, with side wall portions 2 continuous in a U-shape being integrally arranged on the inside, and a concave portion 3 continuous in a U-shape being formed inside.

In this embodiment, both ends of the recess 3 are also closed by the side walls 2a and 2b continuous with the side wall 2, but these ends may remain open. Further, from the side wall portion 2, there is a projecting portion 4 that further extends laterally outward.
They are arranged in a row in a U-shape.

5 is a screw type clamp, which has a U-shaped main body 1;
A screw shaft 10 is threaded through a short cylindrical part 9 with a female thread groove integrally formed inwardly on the bottom plate part 8 of one leg part 6 of a pair of legs 6 and 7 facing each other; It is composed of a pressing plate 11 made of a disc spring mounted on the inner end of the shaft 10 so as to be relatively rotatable, and a rotation operation part 12 connected to the outer end of the screw shaft 10.

Reference numeral 13 denotes a screw shaft for mounting, and an upwardly flared rocking washer 14 for preventing the shaft from coming off is connected to the inner end thereof by integral molding, welding, or screw connection. This washer 14 has a shape obtained by cutting a sphere approximately in half, but is not limited thereto. A concave curved seat 16 into which the washer 14 fits is formed on the bottom plate 15 of the other leg 7 of the U-shaped main body 1 so as to protrude outward. The mounting screw shaft 13 is passed through the provided hole 17 having a larger diameter than the mounting screw shaft 13 from the inside.

The diameters of the hole 17, the washer 14, and the mounting screw shaft 13 are such that when the screw shaft 13 for mounting comes into contact with the inner periphery of the hole 17 due to rocking, the diameter of the outer periphery of the upper end of the washer 14 is A portion of the recess 3
It is designed to protrude from the inside. In other words,
When the washer 14 swings within a predetermined range in which it does not protrude from the inside of the recess 3, the mounting screw shaft 13 is configured not to come into contact with the inner peripheral edge of the blank hole 17.

Reference numeral 18 denotes a hanging fixture screwed onto the mounting screw shaft 13. This attachment 1
8 may be constructed so as to be compatible with the article to be hung or the material used for hanging (chain, wire rope, etc.), and is not limited to a ring-shaped member as shown in FIG. In addition, when attaching the mounting tool 18 in this way, it may be fixed to the mounting screw shaft 13 by caulking or the like, or the screw shaft 13 may not be used and the mounting tool 18 may be attached to the washer 14 protruding from the screw shaft 13. The fitting 18 may be welded to the shaft. Of course,
It is also possible to project a screw shaft from the fixture 18 and screw it into a female threaded hole provided in the washer 14. Furthermore, as shown in FIG. 3, the mounting screw shaft 13 is provided with a square shaft portion 19 that can be engaged with a spanner or the like in order to prevent co-rotation when screwing in other articles. You can leave it there.

It is also possible to provide only the mounting screw shaft 13 in a protruding manner without providing the mounting tools 18 in series. In this case, the user screws and fixes an appropriate member onto the mounting screw shaft 13.
In the structure shown in the figures and FIG. 2, the mounting screw shaft 13 falls out inside the U-shaped main body 1. Therefore, a means for preventing the washer 14 from falling off the catch seat 16 can also be used. For example, as shown in FIG. 5, a stopper 20 can be attached to the mounting screw shaft 13. Also, when attaching other members to the mounting screw shaft 13,
It is also possible to prevent the attached other members from rotating relative to the screw shaft 13 by providing the mounting screw shaft 13 with a square shaft portion into which other members fit.

The clamping device for temporary construction of the present invention, which is constructed as described above, is constructed by fitting the U-shaped main body 1 into a suitable position of a steel structure at a construction site, preferably into an H-shaped steel flange that extends horizontally, and then screwing By screwing in the type clamp 5 and sandwiching the H-shaped steel flange part between the pressing plate 11 and the leg part 7,
The U-shaped main body 1 can be fixed to an H-shaped steel, and temporary work scaffolds, safety nets, and other components can be suspended from the fixture 18 using a chain or the like, or a nut can be attached to the screw shaft 13 for mounting. Can be used together and hung directly. Moreover, washer 1
4, the attachment 18 or the screw shaft 13 for installation can swing, so even if the direction of force acting on the attachment 18 or the screw shaft 13 for installation is oblique during use, the attachment 18 or the mounting screw shaft 13 to safely support other objects without applying bending force, and even if the suspended object swings, the swinging motion force can be absorbed by the receiving seat 16. It is absorbed by the rocking of the washer 14 against the U-shaped main body 1.
Since the swing motion force can be prevented from directly acting on the U-shaped main body 1, there is less risk of the U-shaped main body 1 accidentally coming off from the member to which it is attached, or that the fixed position will shift unexpectedly, and it is possible to safely attach other objects. It can be supported.

Moreover, according to the configuration of the present invention, FIGS.
As shown by the imaginary line in the figure, when the hanging object swings, a part of the upper end periphery of the washer 14 that swings as a result of this swings, and the mounting screw shaft 13 or the fitting 18 and the washer 14 Before the shaft connecting the two contacts the inner peripheral edge of the hole 17, the U-shaped main body 1
The bottom surface 2 of the attached member 25 that is fitted and fixed therein.
5a and prevents the mounting screw shaft 13 or the attachment tool 18 from further swinging, compared to the case where the swinging is restricted by the inner peripheral edge of the hole 17, it is possible to press a relatively thin plate. Even if the U-shaped main body is formed by processing, there is no risk that the inner peripheral edge of the hole 17 will be deformed and the hole diameter will become larger, and it can be used safely. Furthermore, the U-shaped main body 1
Since the washer 14 can be installed inside the U-shaped main body 1 by using the recess 3 formed in the main body 1, the whole can be made compact and durable.

In the above embodiment, the upper peripheral edge of the washer 14 was configured to directly contact the bottom surface 25a of the member to be attached, but as shown in FIG. A flange-like overhanging member 22 formed or attached to the upper end of the washer 14 as shown in FIG.
A plate-shaped projection 23 formed or attached to the center of the upper end of 4.
However, when swinging over a certain angle, the bottom surface 25 of the attached member
It may be arranged so that it comes into contact with a. The projecting member 22 and the plate-shaped protrusion 23 may have a polygonal planar shape or the like and may also be used as a tool engaging portion for preventing the washer 14 from rotating.

Further, when the above-mentioned overhanging member 22 is provided, the overhanging member 22 is configured to come into contact with the bottom plate portion 15 around the catch seat 16 to restrict the swinging when the overhanging member 22 swings by a certain angle or more. However, the same effect as described above can be obtained.

Figure 6 shows that when the washer 14 is oscillated over a certain angle,
An example is shown in which the washer swing regulating member 24, whose upper end abuts, is attached within the recess 3 by, for example, being installed between the side walls 2. Even with this configuration,
The same effect as described above can be obtained. Figure 7 shows
An example is shown in which a weight-reducing recess 14a is provided at the center of the upper end of the washer 14. This recess 14a can also be made into a square hole and used as a tool fitting hole for preventing rotation of the washer.

Note that the device of the present invention can also be used with the mounting screw shaft 13 or the mounting tool 18 facing upward.

Although the present invention can be implemented and used as described above, the feature is that one of the pair of opposing legs of the U-shaped main body has a A screw-type clamp is attached to the screw-type clamp that screws through the screw-type clamp so as to be movable in a distance direction, and the bottom plate of a recess is formed in the other leg so that the side with the screw-type clamp is open. A hanging fixture or a threaded shaft for attaching other components (hereinafter abbreviated as a screw shaft, etc.) that has a recessed receiving seat that projects outward, and the shaft portion passes through the central hole of the recessed receiving seat. A retaining washer is provided at the inner end of the screw shaft, etc., so as to fit rotatably in any direction to the recess receiving seat without protruding from the inside of the recess toward the side where the screw type clamp is located. is configured to be able to swing 360 degrees in any direction using the washer as a fulcrum, and furthermore, by swinging the screw shaft, etc., the shaft portion of the screw shaft, etc. and the inner peripheral edge of the central hole of the recessed receiving seat Before the parts come into contact with each other, the part protruding from inside the recess toward the inside of the leg (the embodiments in FIGS. 1 to 3), the part that comes into contact with the bottom plate part (the example in FIG. 4), or the part inside the recess The point is that the part that comes into contact with the washer swing regulating member provided on the washer (the embodiment in FIG. 6) is provided on the side of the screw shaft, etc.

According to such a clamping device of the present invention, as explained in the embodiment, the screw shaft, etc. is rotated in 360 degrees depending on the direction of tensile action of the member connected to the screw shaft, etc.
Since it can swing in any direction, there is no risk of deformation or damage to the screw shaft, etc., and it can be used safely. Moreover, since the locking washer at the inner end of the screw shaft does not protrude from the recess of the U-shaped main body, the member to be mounted is firmly secured between the screw clamp on one leg and the other leg. It can be stably clamped and fixed and can be used safely.

Furthermore, according to the configuration of the present invention, there is no need to attach any special parts to the U-shaped main body by simply forming a recessed receiving seat in the bottom plate thereof. Since the universal joint is constructed with the recessed receiving seat, the number of parts is extremely small, the structure is extremely simple, and it can be implemented at low cost.
However, in such a structure, the swing range of the screw shaft, etc. is limited by the inner periphery of the center hole, which has weak strength in the recessed receiving seat provided in the bottom plate. The peripheral edge is easily deformed or damaged, and in some cases, there is a risk that the retaining washer may unexpectedly fall off.

However, according to the configuration of the present invention, the rocking of the screw shaft, etc., is prevented by the rocking of the retaining washer in the recess until the shaft portion of the screw shaft, etc. comes into contact with the inner peripheral edge of the central hole. Although it can be freely carried out by
(This kind of effect cannot be expected with the ball joint structure described in the publication), the swinging of the screw shaft, etc. beyond a certain range is caused by the contact between the attached member and the retaining washer rather than the inner periphery of the central hole. This is prevented by contact between the bottom plate of the recess and the washer, or by contact between the washer and the washer swing regulating member provided in the recess, thereby preventing deformation or damage of the inner periphery of the central hole, which is weak in strength. This has made it possible to prevent this from occurring, and it has now become possible to use it safely over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a vertical side view, FIG. 2 is a vertical front view, and FIGS. 3 to 7 are vertical side views of main parts showing modified examples. 1... U-shaped main body, 2, 2a, 2b... Side wall portion, 3... Recessed portion, 5... Screw type clamp, 6, 7
... Leg part, 8, 15 ... Bottom plate part, 13 ... Screw shaft for installation, 14 ... Washer, 16 ... Seat, 18
...Attachment.

Claims (1)

[Scope of utility model registration request] Of the pair of opposing legs of the U-shaped main body, a screw clamp is attached to one of the legs, which threads through the other leg so as to be movable in the near and far directions, and the other leg has a A recessed receiving seat is formed in the bottom plate of the recessed portion formed in the other leg so that the side with the screw type clamp is open, and a recessed receiving seat is formed to protrude outward, and a recessed receiving seat is formed in the central hole of the recessed receiving seat. The inner end of the hanging fixture or screw shaft for attaching other parts that penetrates the shaft part should not protrude from the inside of the recess toward the side where the screw type clamp is located, but should be inserted in any direction with respect to the recess receiving seat. A retaining washer that is rotatably fitted is provided so that the mounting tool or the mounting screw shaft can swing in any direction through 360 degrees using the washer as a fulcrum, and the mounting tool or the mounting screw A portion that protrudes from inside the recess to the inside of the leg before the shaft of the attachment or the mounting screw shaft comes into contact with the inner peripheral edge of the central hole of the recess receiving seat due to the swing of the shaft, or A clamp device for temporary construction work comprising a portion that abuts the bottom plate portion or a portion that abuts the washer swing regulating member provided in the recess on the side of the screw shaft or the like.