JP3209709B2 - Nut and washer fixing cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for receiving a nut and a washer for rotating a bolt head to tighten the work between the bolt head and a polygonal nut. Nut to keep it from rotating
It relates to a washer fixing cap.

[0002]

2. Description of the Related Art Since high-strength bolts are friction-bonded, various works such as steel bars and steel plates must be fastened with a set of high-strength bolts, nuts and washers. In this case, it is common that one work piece is rotated by a rotation angle method to tighten the work. However, depending on the shape of the work, a work space using a tightening tool (for example, a nut runner) for rotating the nut may not be obtained. In this case, the set is tightened by applying a tightening tool to the head of the bolt, but this involves a problem that the nut side rotates together with the bolt.

On the other hand, Japanese Patent Application Laid-Open No. 7-19224 describes a nut cover having a peripheral wall surrounding a peripheral surface of a hexagonal nut around a surface retaining portion for retaining the end surface of the nut. This is to weld the front end of the peripheral wall of the nut cover to the work, thereby holding the nut accommodated therein in such a manner that the nut cannot rotate with respect to the work, and prevent the nut from rotating together when the bolt is tightened.

Further, as shown in FIG. 5, a through hole b for a bolt is formed on the top of a nut cover a having a hat-shaped cross section, and a plurality of cuts and protrusions c are provided around the through hole b. In some cases, the nut is prevented from displacing and rotating together by contacting the peripheral surface of the nut to the side wall d of the nut cover a. The flange a of the cover a is welded to the work.

[0005]

However, in the case of a nut cover having the surface pressing portion and the peripheral wall, even if a washer is provided on the nut side, the washer interferes with the peripheral wall, and the peripheral wall is welded to the work. Can not do it. This point is the same in the case of the nut cover provided with the cut-and-raised portion, and the washer cannot be provided because the washer interferes with the side wall d. Therefore, these nut covers cannot be used to prevent the nuts from rotating together when the washers are provided on the nut side.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a nut / washer fixing cap having a nut receiving portion and a washer receiving portion, and solves the above problems.

That is, according to the invention of the present application, the nut and the washer are housed to rotate the head of the bolt and tighten the work between the bolt head and the polygonal nut, and the nut is attached to the work. A nut / washer fixing cap for holding the nut and washer in a non-rotatable manner, wherein a plurality of through holes for passing the nut and the washer are formed, and a plate fixed to a nut mounting surface of a work, and a through hole of each of the plates. A plurality of caps fixed to one surface of the plate with openings facing each other, wherein the cap is formed in a shape substantially similar to the outer shape of the nut and accommodates the nut inserted through a through hole of the plate; Nut accommodating portion and accommodating the washer formed at the opening side side following the nut accommodating portion and inserted through the through hole of the plate. And Fischer housing portion, the opening portion peripheral
A flange extending outwardly from the edge , wherein the nut receiving portion is formed so that its two-sided width is wider than the two-sided width of the nut and smaller than its diagonal distance, and the washer receiving portion is formed. has a diameter formed to be diagonal distance or the size of the nut accommodating portion, the furan
Diagonally opposite position of the nut receiving part
Is provided with a pair of positioning protrusions or a pair of positioning holes.
Is, the periphery of each through hole of the plate of the cap
A pair of positioning holes into which a pair of positioning protrusions fit or the above
A pair of positioning protrusions that fit into a pair of positioning holes of the cap
A pair of positioning holes around each through hole
Or, the pair of positioning projections
The above-mentioned plate and each cap
Are welded by fitting each other's positioning holes and positioning protrusions
It is characterized by having been done.

[0008] Since the nut / washer fixing cap has a housing for accommodating the nut and a housing for accommodating the washer, even when the washer is provided on the nut side, the washer is accommodated together with the nut. The co-rotation of the nut can be reliably prevented. Further, since the width of the nut is wider than the width of the nut and smaller than the diagonal distance of the nut, even if there is a slight error in the outer dimensions of the nut, the nut is housed in the housing. To prevent co-rotation.

A plurality of the through holes are provided in the plate,
To correspond to the respective through holes are provided a plurality of the cap, the flange out outward Zhang opening portion of the cap is provided, the flange so as to weld to the plate, the diagonal of the nut accommodating portion of the flange a pair of positioning projections or the pair of positioning holes at opposite positions in the direction, the positioning holes of the pair of positioning projections fits a pair of the cap around each through-hole of the plate or the cap
To provide a pair of positioning projections that fit into the pair of positioning holes , and a pair of positioning holes around each through hole or
All of the pair of positioning projections are arranged in a positional relationship facing each other in the same direction, so that all the caps are oriented in the same direction with respect to the plate, that is, all the diagonal directions of the caps are in the same direction. And can be fixed.

[0010] The positioning hole may be a through hole or a depression.

[0011]

Therefore, according to the present invention, a plate fixed to a work is provided with a through hole, and a nut receiving portion and a washer receiving portion formed on one surface of the plate with a shape substantially similar to the outer shape of the nut. The width of the nut receiving section is wider than the width of the nut and narrower than the diagonal distance of the nut, and the diameter of the washer receiving section is larger than the diagonal distance of the nut receiving section. Therefore, even when the washer is provided on the nut side, the nut and the washer can be housed in the cap to reliably prevent the nut from rotating together with the bolt, and there is no dimensional error in the outer shape of the nut. However, this can be dealt with.

Further, a plurality of the through holes in the plate, so as to correspond to the respective through holes so as to provide a plurality of the cap, the outer flange is provided, in a diagonal direction of the nut accommodating portion in said flange to each cap opposed while having a pair of positioning projections or the pair of positioning holes to position, the plate of the pair of positioning holes or the pair around the respective through holes
The positioning protrusion arranged so as they become opposed positional relationship on both the same direction, it is so arranged to weld the respective cap by fitting the positioning holes and the positioning projection on the plate, the plate On the other hand, all caps can be fixed in the same direction, and the positional relationship between the through hole of the plate and the cap can be prevented from shifting during welding.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a nut and washer fixing cap 1 shown in FIG. 1, reference numeral 2 denotes a rectangular flat metal plate (steel plate), and three hat-shaped metal caps 3 are formed on one side of the plate 2 in a longitudinal direction. It is arranged and fixed at regular intervals so as to line up in the direction. As shown in FIG. 2, a through hole 4 through which a nut and a washer are formed is formed at each cap disposing portion of the plate 2, and each cap 3 is provided with its opening facing the through hole 4. I have.

The cap 3 is formed by deep drawing, and is formed in a nut receiving portion 5 for receiving a nut inserted from the through hole 4 and in a portion on the opening side following the nut receiving portion 5. A washer accommodating portion 6 for accommodating a washer inserted from the through hole 4 and a flange 7 projecting outward at a periphery of the opening are provided.

The nut housing 5 is formed in a shape substantially similar to the outer shape of the nut to be used, and a shaft hole 8 through which a shaft of a bolt to be used is formed is formed at the top of the nut housing 5. ing. The nut accommodating portion 5 is formed such that its two-face width is wider than the two-face width of the nut to be used and smaller than its diagonal distance. The washer housing 6
Is formed in a circular shape such that the diameter thereof is equal to or larger than the diagonal distance of the nut accommodating portion 5 (the same size or larger).

The flange 7 is formed in a circular shape.
As shown in FIG. 2, a pair of positioning projections 9, 9 are formed on the flange 7 at positions opposite to the nut accommodating portion 5 in a diagonal direction by punching. Reference numeral 9a shown in FIG. 1 is a punch mark for forming the positioning projection 9. On the other hand, a pair of positioning holes 10, 10 into which a pair of positioning projections 9, 9 of the cap 3 fit are provided around each through hole 4 of the plate 2. The pair of positioning holes 10 around the through holes 4 are disposed so as to have a positional relationship facing each other in the same direction. The positioning hole 10 and the positioning projection 9 of the plate 2 and each cap 3 are fitted to each other, and the fitting portion is welded. Therefore, the three caps 3
As shown in FIG. 1, both are provided so that their diagonals face each other in the same direction by the positioning.

FIGS. 3 and 4 show examples of the use of the nut / washer fixing cap 1. This is an example in which a box-shaped member 12 is connected to a flange of an H-shaped steel 11 by a set of a hexagonal head high-strength bolt 13, a hexagonal nut 14, and a flat washer 15.

That is, in this example, since the length of the high-strength bolt 13 is longer than the distance between the flanges of the H-section steel 11 and cannot be arranged on the side of the H-section steel 11, the high-strength bolt 13 has a box shape together with the washer 15. The nut 14 and the washer 15 are arranged on the H-shaped steel 11 side. In addition, since it is not possible to dispose a powered tightening tool capable of controlling torque between the flanges of the H-shaped steel 11,
The nut 14 and the washer 15 on the H-shaped steel 11 side are fixed to the H-shaped steel 11 by the nut / washer fixing cap 1, and a tightening tool is applied to the hexagonal head of the high-strength bolt 13. A tubular spacer 16 is provided inside the box-shaped member 12 to pass the shaft of the high-strength bolt 13.

First, a washer 15 is inserted into the shaft of the high-strength bolt 13 from the box-shaped member 12 side, and is put out below the flange of the H-shaped steel 11. The washer 15 and the nut 14 are fitted to this. Then, the nut / washer fixing cap 1 is put on the nut 14 and the washer 15 so as to cover the nut 14 and the washer 15, and the plate 2 is welded to the flange of the H-section steel 11. As a result, the nut 14 is connected to the H-section steel 11.
Is fixed so that it cannot rotate. And then
The high-strength bolt 13 is rotated by a tightening tool, and temporarily tightened, fully tightened and, if necessary, further tightened so as to obtain a predetermined tightening torque. Therefore, in this tightening, the nut 14 is prevented from rotating together with the high-strength bolt 13 by the nut / washer fixing cap 1.

[Brief description of the drawings]

FIG. 1 is a perspective view of a nut / washer fixing cap.

FIG. 2 is a sectional view of a nut / washer fixing cap.

FIG. 3 is a sectional view showing an example of use of a nut / washer fixing cap.

FIG. 4 is an enlarged sectional view schematically showing a part of a usage example of a nut / washer fixing cap.

FIG. 5 is a perspective view showing a conventional nut cover.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Nut / washer fixing cap 2 Plate 3 Cap 4 Through hole 5 Nut receiving part 6 Washer receiving part 7 Flange 8 Shaft hole 9 Positioning protrusion 10 Positioning hole 11 H-shaped steel (work) 12 Box-shaped member (work) 13 High-strength bolt 14 Nut 15 Washer 16 Spacer

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-19224 (JP, A) JP-A-8-35514 (JP, A) Fully open 49-140565 (JP, U) Really open 1959 152212 (JP, U) Jiko 48-28595 (JP, Y1) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16B 37/14

Claims (1)

(57) [Claims] 1. A nut for accommodating a nut and a washer for rotating a head of a high-strength bolt to tighten a work between the bolt head and a polygonal nut. A nut / washer fixing cap for holding, wherein a plurality of through holes for passing the nut and the washer are formed, and a plate fixed to a nut mounting surface of a work, and an opening facing each through hole of the plate. And a plurality of caps fixed to one surface of the plate, wherein the cap is formed in a shape substantially similar to the outer shape of the nut, and a nut housing portion for housing the nut inserted from a through hole of the plate. A washer housing part that is formed at the opening-side part following the nut housing part and houses the washer inserted from the through hole of the plate .
A flange extending outward from the periphery of the opening; and the nut receiving portion is formed so that its two-face width is wider than the two-face width of the nut and smaller than its diagonal distance. washer container has a diameter formed to be diagonal distance or the size of the nut accommodating portion, a phase in a diagonal direction of the nut accommodating portion of the flange
A pair of positioning protrusions or a pair of positioning holes
A pair of the caps is provided around each through hole of the plate.
A pair of positioning holes into which the positioning protrusions fit
A pair of positioning projections that fit into a pair of positioning holes on the
Are provided, a pair of positioning holes around each through hole or
Both of the pair of positioning projections are located in the same direction.
It is disposed in engagement, the said plate and each of the cap, mutual positioning hole and positions
A nut / washer fixing cap, which is welded by fitting with a positioning projection .