JP2021162125A - Clamp device - Google Patents

Abstract

To provide a clamp device capable of flexibly corresponding to changes in the mode of construction work, and contributing to the improvement of work efficiency.SOLUTION: A clamp device is composed of a clamp body 11 fixed to an attached member by a nut 15 and a fixing bolt 16, and a suspension member 17 attached to the clamp body 11. The clamp body 11 has a columnar portion 12 extending in a vertical direction, and one side flange 13 and the other side flange 14 extending forward in a generally right angle direction from both ends of the columnar portion 12. The suspension member 17 is attached to an intermediate part in a height direction of the columnar portion 12. The suspension member 17 is molded in a semi-elliptical annular shape, and is rotatably attached to the columnar portion 12 of the clamp body 11 at a semi-elliptical-shaped opening end portion. When the suspension member 17 is rotated, the semi-elliptical-shaped end portion of the suspension member 17 covers the end portions of the one side flange 13 and the other side flange 14.SELECTED DRAWING: Figure 1

Description

The present invention relates to a clamp device that is attached to a part of a building and is used to support other building parts, etc. It relates to a clamp device capable of exerting a function of supporting other building parts by changing the posture).

When constructing a new building such as a newly built overpass or performing maintenance work to extend the life of an existing overpass, it is common to start by creating a work floor (scaffolding). For that purpose, preparations for providing a work floor are required. At this preparatory stage, a clamp device (for example, a "suspended chain clamp") is bolted to the bridge / steel flange to fix it. Taking an overpass as a building, the preparation for installing the above work floor is necessary when the work floor is to be installed where only the piers of the bridge and steel frame are left and standing. It is necessary to attach a suspension chain clamp to the bridge / steel flange at this preparatory stage. The above-mentioned method of attaching the suspension chain clamp is exclusively to sandwich the bridge / steel flange in the holding portion of the suspension chain clamp, and then use a ladder or the like to rotate the bolt from the upper side of the bridge / steel flange to tighten it. There is. Therefore, the work of attaching the suspension chain clamp had to climb and descend the ladder at a high position of the pier, which was a very dangerous work. As a conventional example of such a clamp device used for providing a work floor, for example, there is one shown in FIG. 4, and this example is a clamp device called a suspension chain clamp. In FIG. 4, reference numeral 1 is a clamp body in a conventional clamping device, and the clamp body 1 has a columnar portion 2 extending in the vertical direction, an upper flange 3 extending substantially perpendicular to the upper end of the columnar portion 2, and a columnar portion. It has a lower flange 4 extending substantially parallel to the upper flange 3 in a direction substantially perpendicular to the lower end of the portion 2. A screw hole (female screw) extending through the upper flange 3 is formed at the tip of the upper flange 3, and a bolt 6 is screwed into the screw hole 5. On the other hand, a hanging member 7 formed in an annular shape is attached to the tip of the lower flange 4.

FIG. 5 is a perspective view showing a state in which the conventional clamp device is attached to a bridge / steel frame flange. In FIG. 5, reference numeral 8 is a bridge / steel frame flange. The above-mentioned clamping device is installed with the bridge / steel frame flange 8 sandwiched between the upper flange 3 and the lower flange 4, and by screwing the bolt 6 from above, the bridge / steel frame is connected to the lower flange 4. It is sandwiched and fixed to the flange 8. In this state, the chain hanger 10 is hooked and engaged with the hanger member 7 of the clamp body 1, and the work tool is suspended and supported by the clamp device and the chain hanger 10.

However, in the conventional clamp device as described above, the bolt 6 is attached to the upper flange 3 of the clamp body 1, while the annular suspension member 7 is attached to the lower flange 4, and the bolt is attached from above. Since the work tool is suspended and supported by the chain hanging tool 10 hooked and engaged with the hanging member 7 at the lower part of the tightening of No. 6, there is a problem that it cannot cope with the change in the mounting method of the clamp device. For example, when the clamp device must be attached to the bridge / steel frame flange 8 in an upside-down position (upside-down posture) due to a change in the mode of construction work, in the above-mentioned conventional clamp device, the bolt 6 is screwed from below. However, it is extremely difficult for the suspension member 7 that has come to the upper position to wrap around to the lower side of the bridge / steel frame flange 8, and the tightening operation portion of the bolt 6 and the suspension of the chain hanger 10 are suspended. There arises a problem that the workability deteriorates due to the overlap with the operation part.

The present invention has been made in view of the above-mentioned conventional defects, and an object of the present invention is to provide a clamp device capable of flexibly responding to changes in the mode of construction work and contributing to improvement of work efficiency. That is.

In order to achieve the above object, the clamping device according to the present invention has a columnar portion extending in the vertical direction, a one-sided flange extending substantially perpendicularly forward from one end of the columnar portion, and extending substantially perpendicularly forward from the lower end of the columnar portion. The height of the clamp body having the other side flange, the threaded member provided at the front tip of the one side flange, the male threaded member screw-engaged with the female threaded member, and the columnar portion of the clamp body. A suspension member attached to an intermediate portion in the direction is provided, and the suspension member is formed into a semi-oval ring shape, and is rotatably attached to a columnar portion of the clamp body at an open end portion of the semi-oval shape. The suspension member is pin-attached to the middle portion in the height direction of the columnar portion, and when the suspension member is rotationally moved, the continuous end portion (U-shaped portion) of the suspension member is the end portion of the one-side flange. The clamp body is installed by sandwiching the attached member between the one side flange and the other side flange, and the male thread member is fitted with the female thread member. It is a gist that it is fixedly attached to the attached member by feeding the screw to the attached member.

Further, the clamp body is fixedly attached to the attached member so as to feed the male thread member downward with respect to the female thread member, and the male thread member faces upward with respect to the female thread member. It can be attached to any position when it is fixedly attached to the attached member so as to be screwed to, and the hanging member can be suspended according to any position of the clamp body. It is characterized by being.

A washer member is attached to the tip of the fixing bolt as the male screw member, and the washer member is entirely made of a slab-shaped washer having a truncated cone structure, and the outer peripheral portion of the slab is formed into a square shape. At the same time, the corner portion is bent inside the smooth recess to form the claw portion.

Since the clamp device of the present invention can exert the function of suspending an article without any inconvenience even if the mounting mode (or posture) changes, before and after the change in posture, it can be used in a construction or manufacturing work site. It is possible to meet various demands and improve work efficiency.

It is a perspective view which shows the structure of the clamp device which concerns on one Embodiment of this invention. It is a perspective view which shows the work floor hanging device which combined the clamp device and the chain hanging tool which concerns on the said Embodiment. It is a perspective view which shows the work floor suspension device which combined the clamp device and the chain suspending tool which concerns on the said Embodiment by the aspect different from the case of FIG. It is a perspective view which shows the structure of the conventional clamp device. It is a perspective view which shows the work floor hanging device which combined the said conventional clamp device and a chain hanging tool.

An embodiment of the present invention will be described. FIG. 1 is a perspective view showing a configuration of a clamp device according to an embodiment of the present invention. The use of the clamp device according to this embodiment is the same as the clamp device according to the above-mentioned conventional example, which is called a suspension chain clamp, and is attached to a bridge, a steel frame flange (which serves as a member to be attached) or the like at a construction work site. Used to suspend and support tools.

In FIG. 1, reference numeral A indicates a clamp device of the present invention. Reference numeral 11 denotes a clamp main body in the clamping device A. The clamp main body 11 is formed by bending or press-molding a metal plate material such as a steel plate, and has a columnar portion 12 extending in the vertical direction and a direction substantially perpendicular to the upper end of the columnar portion 12. It has an upper flange 13 extending forward and a lower flange 14 extending forward in a substantially perpendicular direction from the lower end of the columnar portion 12. In the present invention, as will be described later, since the clamp device A may be installed upside down depending on the usage state, the upper flange 13 and the lower flange 14 are names given for convenience. In other words, the side flange 13 and the other side flange 14. The clamp body 11 is formed by bending to form a substantially U-shaped planar shape having a certain width on the back of the columnar portion 12, and the upper flange 13 and the lower flange 14 are made of a pair of plate materials. Become. The space between the upper flange 13 and the lower flange 14 is a space from which the plate material has been cut off. The upper flange 13 and the lower flange 14 are formed so as to extend substantially parallel to each other.

A nut 15 corresponding to a female screw member is welded and attached to the front tip portion of the upper flange 13 between a pair of plate members, and a fixing bolt 16 corresponding to a male screw member is screwed into the nut 15. A washer member 20 is attached to the tip of the fixing bolt 16. The washer member 20 is entirely made of a slab-shaped washer having a truncated cone structure, and the outer peripheral portion of the slab is formed into a square shape (for example, an octagon), and the corner portion is folded inside the slab-shaped recess. The claw portion 21 is formed by being bent. Then, the washer member 20 is attached to the tip of the fixing bolt 16 at the outer apex of the truncated cone, and the further-shaped recess is directed forward. Further, a suspension member 17 formed in a semi-elliptical ring shape is rotatably attached to the columnar portion 12 of the clamp body 11 at an intermediate portion in the height direction thereof. Since the suspension member 17 has a semi-oval shape, one end is a U-shaped continuous end 17a, while the other end is a parallel bar-shaped open end 17b. The suspension member 17 is rotatably attached to the columnar portion 12 of the clamp body 11 at its open end 17b by a stopper such as a pin 18. Since the suspension member 17 is attached to the intermediate portion in the height direction of the columnar portion 12, when the suspension member 17 is rotated about 180 degrees around the pin 18 portion, an oval annular body of the suspension member 17 is formed. The tip (U-shaped continuous end 17a) can easily reach (ie, cover) the upper and lower ends of the upper flange 13 and the lower flange 14.

In the mounting mode shown in FIG. 2, the clamp device A as described above is installed with the bridge / steel frame flange 8 sandwiched between the upper flange 13 and the lower flange 14, and the fixing bolt 16 is screwed in from above. By feeding the screw, it is sandwiched and fixed to the bridge / steel frame flange 8 with the lower flange 14. At this time, the washer member 20 attached to the tip of the fixing bolt 16 is sandwiched by the claw portion 21 biting into the bridge / steel frame flange 8, so that the clamp device A is more reliably fixed. In this state, the chain hanger 10 can be hooked and engaged with the hanger member 17 of the clamp body 11, and the work tool can be suspended and supported by the clamp device A and the chain hanger 10.

Further, in the mounting mode shown in FIG. 3, the clamp device A is turned upside down with respect to the mounting mode shown in FIG. 2, and the upper flange 13 is on the lower side with respect to the bridge / steel frame flange 8. On the other hand, the lower flange 14 is in a position to come to the upper side with respect to the bridge / steel frame flange 8, and the fixing bolt 16 also has its head downward and is screwed upward. In this posture, the clamping device A is installed with the bridge / steel frame flange 8 sandwiched between the upper flange 13 and the lower flange 14, and the fixing bolt 16 is screwed into the nut 15 from below and screwed to feed the lower flange. It is sandwiched and fixed to the bridge / steel frame flange 8 between the 14 and the bridge. Even in this posture, the hanging member 17 of the clamp body 11 can hang downward from the U-shaped portion by rotating around the pin 18 portion. Therefore, in this state, the chain hanger 10 can be hooked and engaged with the hanger member 17 of the clamp body 11, and the work tool can be suspended and supported by the clamp device A and the chain hanger 10.

From the above, according to the clamp device A of the present invention, what happens when the bolt of the clamp device A must be screwed in from the lower side due to the convenience of the work content or the relationship with the bridge / steel frame flange 8. It is possible to carry out the hanging work even in a suitable posture, and it is possible to realize a highly versatile clamp device.

In the present embodiment, the clamp main body 11 of the clamp device A is described by showing an example in which a metal plate processed by sheet metal is bent and molded. However, unlike this, the clamp main body 11 is made of a metal rod or the like. It may be manufactured from a material by forging.

The clamp device of the present invention is securely attached to the bridge / steel flange of a construction site by screwing from above or from below to perform a work floor suspension function. And useful.

1,11 Clamp body 2,12 Columnar part 3,13 Upper flange 4,14 Lower flange 8 Bridge / steel frame flange (attached member)
10 Chain hanger 15 Nut 16 Fixing bolt 17 Hanger member 17a Continuous end (U-shaped part)
17b Open end 18 pins

Claims (3)

A clamp body having a columnar portion extending in the vertical direction, a flange on one side extending substantially perpendicular to the front from one end of the columnar portion, and a flange on the other side extending substantially perpendicular to the front from the lower end of the columnar portion.
Since it is provided at the front tip of the one-side flange, the screw member and
The male thread member screw-engaged with this female thread member and
A hanging member attached to the middle portion of the columnar portion of the clamp body in the height direction, and
With
The suspension member is formed into a semi-oval ring shape, and is rotatably attached to a columnar portion of the clamp body at an open end portion of the semi-oval circle.
The suspending member is pin-attached to the intermediate portion in the height direction of the columnar portion, and when the suspending member is rotated, the continuous end portion (U-shaped portion) of the suspending member becomes the end portion of the one-side flange and the other-side flange. It is designed to cover each end of the
The clamp body is fixedly attached to the attached member by installing the attached member sandwiched between the one side flange and the other side flange and screwing the male thread member to the female thread member. ,
A clamp device characterized by that. The clamp body is fixedly attached to the attached member so as to screw the male thread member downward with respect to the female thread member, and the male thread member is screwed upward with respect to the female thread member. It can be attached to any position when it is fixedly attached to the attached member so as to be fed.
The suspending member can be suspended according to any posture of the clamp body.
The clamp device according to claim 1. A washer member is attached to the tip of the fixing bolt as the male screw member, and the washer member is entirely made of a slab-shaped washer having a truncated cone structure, and the outer peripheral portion of the slab is formed into a square shape. The clamp device according to claim 1 or 2, wherein a claw portion is formed by bending a corner portion inside a flat-shaped recess.

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