JP2001323607A - Roof bolt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof bolt capable of maintaining satisfactory tightening force without scratching overlapped platelike bodies when the platelike bodies are tightened and fixed. SOLUTION: This roof bolt consists of a bolt 1 having a large diameter part (a) at a tip and a washer 2, an enlarged sleeve 3, a collar 4, and a nut 5 which are attached to the bolt 1 in this order. By fixing the nut 5 and rotating the bolt 1, an inner peripheral face of the enlarged sleeve 3 is slidably engaged with an outer peripheral face of the collar 4, thereby tightening and fixing a plurality of platelike bodies A, B arranged between the enlarged sleeve 3 and the nut 5 so as to nip and hold them. A washer 2 is provided between the large diameter part (a) at the tip of the bolt 1 and the enlarged sleeve 3 sot that a bottom face of the enlarged sleeve 3 does not scratch a surface of the plate body B because the rotation of the bolt 1 is not transmitted to the enlarged sleeve 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof bolt used for laminating and fastening a plurality of plate-like members.

[0002]

2. Description of the Related Art Using a conventional roof bolt, for example,
As shown in FIG. 4, in order to fix two roof shingles in an overlapping manner, a common hole 17 provided in the overlapping roof shingles A and B is used.
From the top of the roof plate material A, the tip large diameter portion a of the bolt 11
, The expansion sleeve 13 and the collar 14 are inserted and protruded below the roof plate B (FIG. 4A), and the nut 1 on the seal packing washer 16 remaining above the roof plate A is left.
5 is fixed and the bolt 11 is rotated so that the inner peripheral surface of the expanding sleeve 13 is below the
4 is slidably engaged with the outer peripheral surface of the sleeve 4, thereby expanding the expanding sleeve 13 [FIG. 4 (b)], and between the expanding sleeve 13 and the washer 16 with the packing for sealing. And the roof slabs A and B were clamped and fixed.

[0003]

However, in the above-mentioned conventional method of fastening a roof sheet material using a roof bolt, the nut 15 is fixed on the roof sheet material A and the bolt is rotated, whereby the expansion sleeve 13 is expanded. When a large load is applied when the opening is opened, the expanding sleeve 13 is often rotated together with the bolt 11, and as a result, there is a problem that the expanding sleeve 13 rubs and damages the roof plate material B. Damage to the roof shingle not only makes the appearance worse, but also causes cracks and defects, and the strength of that part is reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a roof bolt which does not damage a plate when a plurality of plates are overlapped and fastened and fixed.

[0005]

In order to solve the above-mentioned problems, a roof bolt according to the present invention has a washer interposed between a tip end portion of the bolt and an expansion sleeve, and the tip end portion of the bolt and the expansion sleeve are provided. To reduce the frictional force between them and prevent the rotation of the bolt from being transmitted to the expansion sleeve.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic side view of a roof bolt of the present invention, and FIG. 2 is a schematic partial exploded sectional view of a mounting portion when the roof bolt of the present invention is used for a roof plate. FIG. 3 is a schematic partial exploded sectional view showing an attachment portion when a wall plate member is fastened using the roof bolt of the present invention.

As shown in FIG. 1, a roof bolt according to the present invention includes a bolt 1 having a large-diameter portion a at its tip,
And a spreading sleeve 3, for example, a collar 4 made of synthetic resin and a nut 5 are attached in this order, and the rear end of the bolt 1 is gripped while fixing the nut 5 using a dedicated electric tool. The inner peripheral surface of the expanding sleeve 3 is slidably engaged with the outer peripheral surface of the collar 4, whereby the expanding sleeve 3 and the nut 5 are expanded.
And a plurality of plate-like bodies arranged between the two are fastened and fixed in a sandwiched manner.

[0008] The number of plate members to be fastened is a composite plate member by combining a continuous overlapping portion of unit plate members or plate members having different performances and properties as shown in Figs. There may be a case where a composite plate-like body composed of a large number of sheets is used instead of an example of two sheets, and a case where a large number of sheets are used, such as a case where a composite plate-like body is connected and overlapped.

A case where a roof plate is fastened using the roof bolt of the present invention will be described with reference to FIG. For fastening the roof slat, a washer 6 with a sealing packing is used to maintain waterproofness. First, a common hole 7 is formed by piercing a predetermined location of the two roof shingles A and B which are superimposed.
The large-diameter portion a of the tip of the bolt 1, the washer 2, the expanding sleeve 3, and the collar 4 are projected downward from the roof plate B into the common hole 7 from above the roof plate A.

Next, when the bolt 1 is rotated using a dedicated electric tool (not shown) while fixing the nut 5 attached to the bolt 1 on the roof plate A, the washer 6 with the sealing gasket is formed. The roof plate material A is pressed from above, and the large diameter portion a of the bolt 1 raises the washer 2, the expanding sleeve 3 and the collar 4, and further expands the expanding sleeve 3.
Of the collar 4 is slidably engaged with the outer peripheral surface of the collar 4, whereby the expanded sleeve 3 presses the roof plate B from below, thereby holding the roof plate A, B in a pinched state. To secure.

In the roof bolt according to the present invention, unlike the conventional roof bolt, the washer 2 is interposed between the large-diameter portion a of the bolt 1 and the expanding sleeve 3, so that a dedicated power tool is used. , While fixing nut 5, bolt 1
Is rotated between the large diameter portion a of the bolt 1 and the washer 2 and between the washer 2 and the expanding sleeve 3, the rotation of the bolt 1 is not transmitted to the expanding sleeve 3. The roof sheet material B is not damaged.

The type of washer 2 used in the present invention is not particularly limited, but both surfaces are smooth to further reduce the frictional force between the large-diameter portion a of the bolt 1 and the expanding sleeve 3. Are preferred.

FIG. 3 shows an example in which the roof bolt of the present invention is applied to a wall surface and two wall plate members C and D are overlapped and fastened and fixed. In this example, the large-diameter portion a of the bolt 1, the washer 2, the expanding sleeve 3, and the collar 4 are sequentially inserted through the common hole 7 ′ provided in the wall plate materials C and D from the wall plate material C side. Put out of D. Next, when the bolt 1 is rotated while fixing the nut 5 on the wall plate material C using a dedicated electric tool, the nut 5 presses the wall plate material C via the washer 8 and the expanding sleeve 3 The wall material D is expanded and pressed, and the wall plate materials C and D are fastened and fixed in a sandwich shape.

Also in this case, as described above, the washer 2 greatly reduces the frictional force between the large-diameter distal end portion a of the bolt and the expanding sleeve 3, so that even if the bolt 1 rotates, this rotation will expand. Since it is not transmitted to the open sleeve 3, the expanding sleeve 3 does not damage the surface of the wall plate material D. As described above, the roof bolt of the present invention can be applied not only to roof materials but also to various fields in which a plurality of plate-like bodies are overlapped and fixed. Note that the plate-like body to which the roof bolt of the present invention can be applied includes a so-called corrugated plate having a corrugated cross section.

[0015]

According to the roof bolt of the present invention, when fastening and fixing the superposed plate-like members, even if the bolt is rotated while the nut is fixed with a dedicated electric tool, the expansion sleeve rotates. There is no damage to the plate.

[Brief description of the drawings]

FIG. 1 is a side view of a roof bolt according to the present invention.

FIG. 2 is a schematic partial exploded sectional view of a mounting portion when the roof bolt using the roof bolt of the present invention is used.

FIG. 3 is a schematic partial exploded sectional view showing an attachment portion when a wall plate material is fastened using the roof bolt of the present invention.

FIG. 4 (a) is a schematic partial exploded sectional view showing a state before fastening a roof sheet material using a conventional roof bolt, and FIG. 4 (b) is a schematic part showing a state after fastening. It is an exploded sectional view.

[Explanation of symbols]

 1, 11 bolt 2 washer 3, 13 expansion sleeve 4, 14 collar 5, 15 nut 6, 16 washer with packing for seal 7, 7 ', 17 common hole 8 washer a bolt tip A, B, A', B 'Roof board C, D Wall board

Claims (1)

[Claims] 1. A plurality of plate-like bodies, each of which is attached to a common hole provided in the plurality of plate-like bodies so as to cover a shaft of the bolt by being engaged with a tip of a bolt from one surface of the plurality of plate-like bodies. The expanded sleeve and the expanded sleeve are inserted through the expanded collar to protrude from the other surface, and a nut attached to a rear portion of the bolt is fixed and the bolt is rotated to open the expanded sleeve. In a roof bolt for fastening and fixing the plurality of plate-like bodies between the expansion sleeve and the nut, a washer is interposed between a tip end of the bolt and the expansion sleeve. Roof bolt.