JP7168978B2 - Suspension bolt fixture - Google Patents

Description

The present invention relates to a hanger bolt fixture for suspending a hanger bolt to a C-shaped steel.

Conventionally, a hanging bolt hanger as disclosed in Patent Literature 1, for example, is used to hang down and fix a hanging bolt to a C-shaped steel used for a ceiling foundation, for example. As shown in FIG. 3(b) of Patent Document 1, the hanger bolt hanger 5 includes an engaging portion 14 that engages with the lower end of the opening of the C-shaped steel 3 and a lower surface portion of the C-shaped steel 3. A screw hole 15 into which the suspension bolt 2 is screwed is provided in the horizontal plate piece 5b facing the . Then, the engaging portion 14 is engaged with the C-shaped steel 3, and then the hanging bolt 2 is tightened so that the upper end portion of the hanging bolt 2 approaches the lower surface portion of the C-shaped steel 3, whereby the C-shaped steel 3 is tightened. Suspension bolts 2 can be suspended from steel 3 .

JP-A-2006-97250

By the way, such a hanging bolt hanger slips laterally with respect to the C-shaped steel when it is subjected to a strong shaking due to an earthquake or the like when the hanging bolt is not sufficiently tightened, or the engaging part is displaced from the C-shaped steel. There is a risk that it may come off from the lower end of the opening and drop off from the C-shaped steel.

On the other hand, in order to prevent such a problem, a reinforcing member that surrounds the hanger for the hanging bolt is separately prepared, and after the hanging bolt is suspended and fixed to the C-shaped steel by the hanger for the hanging bolt, the hanger is attached to the hanger. A method of fitting the reinforcing member from the outside and fixing the reinforcing member to the C-shaped steel with fasteners such as screws is conceivable. However, the installation of such hanging bolt hangers usually requires work at a high place where direct visual observation is not possible, and it is assumed that it will take time to fit the reinforcing member into the hanger. Since it is carried out in a raised state, it imposes a considerable burden on the operator.

An object of the present invention is to solve such problems. To provide a hanging bolt fixture which can be easily installed and which can be easily installed.

The present invention is a suspension bolt fixture for suspending and fixing a suspension bolt to a C-shaped steel, comprising an upper engaging portion that engages the lower end of an opening of the C-shaped steel, and a lower surface portion of the C-shaped steel. a body portion having a suspension bolt holding portion facing each other and screwing the suspension bolt; and a first back plate portion connecting the upper engaging portion and the suspension bolt holding portion; a second back plate portion attachable to steel and positioned outside said first back plate portion; and a second back plate portion connected to said second back plate portion and retaining said hanger bolt when attached to said C-beam steel. and a reinforcing portion having a fixing portion surrounding the portion, wherein either one of the first back plate portion and the second back plate portion has a vertically extending elongated hole, and the first The other of the back plate portion and the second back plate portion is inserted through the elongated hole, and moves along the elongated hole when moving the reinforcing portion relative to the main body portion. On the other hand, it has a shaft portion for guiding the reinforcing portion in the vertical direction.

In such a suspension bolt fixture, it is preferable that the shaft portion has a flange portion that has an outer shape larger than the width of the long hole and prevents the shaft portion inserted through the long hole from coming off.

Further, the fixing portion includes a pair of top plate portions facing the lower surface portion of the C-shaped steel, holes through which the fasteners are inserted, and a pair of top plate portions each of which is attached to each of the top plate portions. It has a pair of side wall portions connected to the two back plate portions, and the pair of side wall portions position the hanging bolt holding portion between the side wall portions to move the reinforcing portion with respect to the main body portion. Preferably, it functions as a guide in the vertical direction.

The hanger bolt fixture according to the present invention is capable of hanging down the hanger bolt to the C-beam by the body portion, and by the reinforcing portion attached to the underside of the C-beam with the fastener, the body portion to the C-beam. side slippage and falling off. When attaching the reinforcing member to the C-shaped steel after suspending the suspension bolt to the C-shaped steel in the main body, it is provided on either the first back plate part of the main body part or the second back plate part of the reinforcing part. The elongated hole and the shaft portion provided in the other of the first back plate portion and the second back plate portion function to guide the reinforcing member in the vertical direction when the reinforcing member is moved with respect to the main body portion. Reinforcement members can be easily attached. In addition, since the reinforcing part can be moved in the vertical direction, it can be attached to C-shaped steels of different sizes and plate thicknesses, so it has excellent versatility.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows one Embodiment of the suspension bolt fixing device according to this invention, (a) is a perspective view, (b) is the perspective view which changed the viewpoint and showed. (a) is a plan view, (b) is a front view, (c) is a side view, and (d) is a rear view of the body portion constituting the hanging bolt fixture shown in FIG. be. (a) is a plan view, (b) is a front view, (c) is a bottom view, and (b) is a side view of the reinforcing portion constituting the hanging bolt fixture shown in FIG. There is, and (e) is a perspective view. It is a figure explaining the condition which suspends and fixes a hanging bolt to C-shaped steel by a main-body part, Comprising: (a) is sectional drawing by a side view, (b) is a perspective view. It is a figure explaining the condition which attaches a reinforcement part to C-shaped steel, (a) is sectional drawing by side view, (b) is a perspective view.

An embodiment of a hanging bolt fixture according to the present invention will be described below with reference to the drawings. In addition, the positional relationship of “upper” and “lower” in this specification and the like refers to the direction in a state where the suspension bolt is suspended and fixed to the C-shaped steel by the suspension bolt fixture.

As shown in FIG. 1 , the hanging bolt fixture 1 of this embodiment is composed of a body portion 2 , a reinforcing portion 3 and a rivet 4 .

The body portion 2 is composed of a first back plate portion 21, an upper engaging portion 22, and a hanging bolt holding portion 23 as shown in FIG. As shown in FIG. 2, the first back plate portion 21 is provided so as to form a plate shape and extend in the vertical direction. An upper hole 21a located above and penetrating the first back plate portion 21 (also penetrating the upper engaging portion 22) is provided in the center portion in the width direction of the first back plate portion 21, and an upper hole 21a is located below the first back plate portion. A pilot hole 21b is provided through the portion 21 . The upper engaging portion 22 is connected to the upper end portion of the first back plate portion 21, and is folded back with respect to the first back plate portion 21 to extend downward. , and an upper piece portion 22b extending substantially horizontally from the lower end portion of the front plate portion 22a. The suspension bolt holding portion 23 is connected to the lower end portion of the first back plate portion 21, and is provided around the bottom wall portion 23a positioned below the upper piece portion 22b and the hole penetrating the bottom wall portion 23a. A burring is provided, and a nut portion 23b having a female thread formed on the inner surface of this hole and the burring is provided. The suspension bolt 100 shown in FIG. 4 is screwed into the nut portion 23b.

The reinforcing portion 3 is composed of a second back plate portion 31 and a fixing portion 32 as shown in FIG. As shown in FIG. 3, the second back plate portion 31 is provided so as to form a plate shape and extend in the vertical direction. A longitudinally extending long hole 31a is provided in the widthwise central portion of the second back plate portion 31 . A lower piece portion 31b extending substantially horizontally is provided at the lower end portion of the second back plate portion 31 . The fixing portion 32 is connected to a pair of side wall portions 32a connected to the second back plate portion 31 on the left and right sides of the second back plate portion 31, and connected to upper end portions of the respective side wall portions 32a and separated from each other. A pair of horizontally extending top plate portions 32b and a circular hole portion 32c passing through the top plate portions 32b are provided. The fixed portion 32 also includes a pair of side piece portions 32d extending substantially horizontally from the lower ends of the side wall portions 32a. A gap 32e is provided between the side pieces 32d. The functions of the lower piece portion 31b and the side piece portion 32d will be described later.

The rivet 4, as shown in FIG. I have. The rivets 4 are arranged so that the body portion 2 is positioned with respect to the reinforcing portion 3, the second back plate portion 31 is positioned outside the first back plate portion 21, and the suspension bolt holding portion 23 is accommodated between the pair of side wall portions 32a. After inserting the other end of the shaft portion 41 into the elongated hole 31a and the prepared hole 21b (see FIG. 2), it is fixed to the main body portion 2 by caulking.

Here, the outer diameter of the shaft portion 41 is smaller than the width of the long hole 31a. The width of the suspension bolt holding portion 23 is smaller than the interval between the pair of side wall portions 32a. Therefore, the body portion 2 can move vertically with respect to the reinforcing portion 3 . At this time, the elongated hole 31a functions to guide the shaft portion 41 in the vertical direction, and the pair of side wall portions 32a functions to guide the suspension bolt holding portion 23 in the vertical direction. Since the outer diameter of the flange portion 42 is larger than the width of the elongated hole 31a, the reinforcing portion 3 does not come off from the main body portion 2. As shown in FIG.

As shown in FIG. 4, the suspension bolt 100 is screwed into the nut portion 23b through the gap 32e in the suspension bolt fixture 1 having such a configuration. The hanging bolt 100 is not completely tightened, and a sufficient gap is left between the upper end portion of the hanging bolt 100 and the upper piece portion 22b. Then, the hanging bolt fixture 1 in this state is attached to the C-shaped steel 200 . The C-shaped steel 200 is also called lip channel steel, and is a thin plate having a C-shaped cross section as shown in the figure. Moreover, the C-shaped steel 200 of this embodiment shall be used for a ceiling base|substrate in the state which directed the opening part 201 to the side. A portion located below the opening 201 and directed upward is referred to as an opening lower end portion 202 , and a portion extending substantially horizontally from the opening lower end portion 202 is referred to as a lower surface portion 203 .

When attaching the hanging bolt fixture 1 to the C-shaped steel 200, first, the upper engaging portion 22 is hooked on the opening lower end portion 202, and then the hanging bolt 100 is moved so that the upper end portion of the hanging bolt 100 approaches the lower surface portion 203. rotate. As a result, the lower surface portion 203 is tightened by the hanging bolt 100 and sandwiched between the upper piece portion 22b and the upper end portion of the hanging bolt 100, so that the hanging bolt 100 is suspended and fixed to the C-shaped steel 200.

After that, as shown in FIG. 5 , the reinforcing portion 3 is moved upward with respect to the main body portion 2 and the top plate portion 32 b is brought into contact with the lower surface portion 203 . As described above, the reinforcing portion 3 is not detached from the main body portion 2 by the rivets 4, and when it is moved upward, it is secured by the long hole 31a and the shaft portion 41, and the pair of side wall portions 32a and the suspension bolt holding portion 23. Since the operator is guided, direct visual observation is not possible, and work at high places, which is performed with arms raised, can be easily performed.

After that, the reinforcing portion 3 can be attached to the C-shaped steel 200 by inserting a fastener 300 such as a screw through the hole portion 32c and tightening it to the lower surface portion 203 . At this time, since the main body portion 2 is surrounded by the reinforcing portion 3 fixed to the C-shaped steel 200, it prevents the main body portion 2 from laterally slipping or falling off from the C-shaped steel 200. can do. When an excessive downward force acts on the suspension bolt 100, the force acting on the suspension bolt 100 deforms the suspension bolt holding portion 23 so as to bend downward, and the main body portion 2 may drop off. However, excessive deformation of the suspension bolt holding portion 23 can be suppressed by the lower piece portion 31b and the side piece portion 32d located below the suspension bolt holding portion 23, so that the main body portion 2 can be more reliably prevented from falling off. . Further, since the reinforcing portion 3 can be moved with respect to the main body portion 2, the same suspension bolt fixture 1 can be used for C-shaped steels 200 having slightly different sizes and plate thicknesses.

As described above, the present invention has been described by showing specific embodiments, but the hanging bolt fixture according to the present invention is not limited to the above-described embodiments, and may be modified in various ways within the scope of the claims. is also included. For example, in the above-described embodiment, the elongated hole 31a is provided in the second back plate portion 31 of the reinforcing portion 3, and the shaft portion 41 of the rivet 4 is fixed to the main body portion 2 having the first back plate portion 21. However, a long hole may be provided in the first back plate portion 21 of the main body portion 2 and the rivet 4 having the shaft portion 41 may be fixed to the reinforcing portion 3 . Moreover, the flange portion 42 may have an outer shape larger than that of the elongated hole 31a, and the shape may not be circular. The upper hole 21a provided in the body portion 2 is intended to fix the body portion 2 to the C-shaped steel 200 by inserting a fastener such as a screw and tightening it to the opening lower end portion 202 shown in FIG. However, it is not always necessary to provide it.

1: Hanging bolt fixture 2: Body portion 3: Reinforcing portion 4: Rivet 21: First back plate portion 21a: Upper hole 21b: Lower hole 22: Upper engaging portion 22a: Top plate portion 22b: Upper piece portion 23: Hanging bolt holding part 23a: Bottom wall part 23b: Nut part 31: Second back plate part 31a: Long hole 31b: Lower piece part 32: Fixing part 32a: Side wall part 32b: Top plate part 32c: Hole part 32d: Side piece Part 32e: Gap 41: Shaft 42: Flange 100: Suspension bolt 200: C-shaped steel 201: Opening 202: Opening lower end 203: Lower surface 300: Fastener

Claims (3)

A suspension bolt fixture for suspending and fixing a suspension bolt to a C-shaped steel,
an upper engaging portion that engages the lower end of the opening of the C-shaped steel; a suspension bolt holding portion that faces the lower surface of the C-shaped steel and engages with the suspension bolt; a body portion having a first back plate portion that connects with the bolt holding portion;
a second back plate portion attachable to the C-beam by fasteners and positioned outwardly of the first back plate portion; and a reinforcing portion having a fixing portion surrounding the suspension bolt holding portion,
Either one of the first back plate portion and the second back plate portion has an elongated hole extending in the vertical direction, and the other of the first back plate portion and the second back plate portion is: A suspender having a shaft portion that is inserted through the elongated hole and moves along the elongated hole to guide the reinforced portion vertically with respect to the main body when the reinforcing portion is moved relative to the main body. bolt fixings. 2. The hanging bolt fixture according to claim 1, wherein the shaft has a flange portion that has an outer shape larger than the width of the elongated hole and prevents the shaft inserted through the elongated hole from slipping out. The fixing portion includes a pair of top plate portions facing the lower surface portion of the C-shaped steel, a hole penetrating the top plate portions and through which the fastener is inserted, and a pair of top plate portions that are connected to the second Having a pair of side wall portions connected to the back plate portion,
2. The pair of side wall portions function as guides in the vertical direction when the suspension bolt holding portion is positioned between the side wall portions and the reinforcing portion is moved with respect to the main body portion. 2. The suspension bolt fixture according to 2.

Images