JPH0667916U - Two-stage washer and beam pipe mounting structure of fence using this - Google Patents

Abstract

(57) [Summary] [Purpose] Align the axis of the mounting bolt with the axis of the bracket using the two-step washer. [Structure] The bracket 13 has a bottomed cylindrical shape having a spherical bottom portion 13a. The bracket 13 is fixed to the column 11 with a mounting bolt 15 having a two-stage washer 16 interposed. The two-stage washer 16 includes a small-diameter perforated circular plate 16a that comes into contact with the spherical bottom portion 13a, a large-diameter perforated circular plate 16b located in the tubular portion 13d, and both-perforated circular plates 16a,
It is composed of a cylindrical member 16c that defines the interval of 16b. Due to the structure of the two-stage washer 16, the central axis line easily coincides with the axis line of the bracket 13. Therefore, the axis of the mounting bolt 15 using the two-stage washer 16 as a washer coincides with the axis of the bracket 13 and becomes a right angle with respect to the seat surface.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a two-stage washer and a fence beam pipe mounting structure using the washer, and particularly to a fence beam pipe mounting structure for mounting a beam pipe to a column through a bottomed cylindrical bracket having a spherical bottom. .

[0002]

[Prior art]

 Common washers used for tightening and fixing with bolts are flat washers, spring washers, etc., but when the seat surface of the bolt or nut is spherical (when it is a part of spherical surface), its mounting bolt. As a washer, a washer with a cross-section that matches the spherical surface has been used.

[0003]

[Problems to be solved by the device]

 With the conventional washer whose cross-sectional shape matches the spherical surface, the contact between the spherical surfaces does not always result in the washer position being fixed, and therefore the axis of the mounting bolt inserted into the washer is correct. It often happens that the surface is not at right angles. Therefore, the tightening of the mounting bolts tends to be insufficient. Also, when the spherical surface of the seat has various curvatures, it is necessary to prepare a washer with a cross section having a spherical surface that matches the curvature, which is complicated and costly.

By the way, in a fence having a structure in which a beam pipe is connected to a supporting column, as a beam pipe mounting structure, a mounting bolt in which a bottomed cylindrical bracket having a spherical bottom (that is, a bottomed cylindrical body) is passed through the bottom of the bracket. If the structure is that the end of the beam pipe is fitted and fixed to this bracket by using the bracket, the mounting bolt is not exposed, which is aesthetically pleasing. In this case, however, the bearing surface of the nut becomes the spherical bottom of the bracket, that is, the spherical surface, so it is necessary to use a washer having a spherical cross section as described above. However, this washer has the above-mentioned drawbacks.

The present invention has been made in view of the above circumstances, and is adopted when fixing a bottomed cylindrical body to a mounting object with a mounting bolt that passes through the bottom of the bottomed cylindrical body having a spherical bottom. The washer that can correctly set the axis of the mounting bolt at right angles to the seat surface and that can be tightened sufficiently with the mounting bolt, and that has high versatility and is low in cost. The purpose is to It is also an object of the present invention to provide a beam beam mounting structure for a fence in which the above features of the washer are effectively used.

[0006]

[Means for Solving the Problems]

 The present invention which solves the above-mentioned problem makes a hole in the center of the spherical bottom of a bottomed cylindrical body having a spherical bottom, and fixes the bottomed cylindrical body to a mounting object by a mounting bolt inserted through this hole. A two-stage washer used in this case, a small-diameter perforated circular plate that contacts the inner surface of the spherical bottom, a large-diameter perforated circular plate located in the cylindrical part of a bottomed cylinder, and a double-sided perforated plate. And a cylindrical member interposed between the circular plates to define the distance between the circular plates with holes.

According to a second aspect of the present invention, in a beam pipe mounting structure for fixing a beam pipe to a support via a bottomed tubular bracket having a spherical bottom portion, the two-stage washer according to the first aspect is provided with the spherical bottom portion of the bracket. It is characterized in that the bracket is directly or indirectly fixed to the column by means of mounting bolts inserted through the hole of the two-stage washer and the hole formed in the spherical bottom of the bracket.

[0008]

[Action]

 In the two-stage washer with the above configuration, the small-diameter perforated circular plate of the two-stage washer, the tubular member, and the large-diameter perforated circular plate of the two-stage washer are housed in that order. As a result, the small-diameter perforated circular plate comes into contact with the spherical bottom of the bottomed cylindrical body, the large-diameter perforated circular plate is located in the cylindrical portion, and the distance between the two perforated circular plates depends on the tubular member. Stipulated. As a result, the center of the circular plate with two holes is aligned with the axis of the cylinder with a bottom, and therefore the mounting bolt through the hole of the circular plate with a hole is easily aligned with the axis of the cylinder with the bottom. It becomes perpendicular to the surface, and the bolts are firmly tightened and fixed to the object to be mounted.

In addition, since the circular plate with a small diameter has a slightly different contact position even if the curvature of the spherical bottom of the bottomed cylinder changes, it still contacts the spherical bottom, so that the spherical bottom It can be used with various curvatures and is highly versatile.

The mounting bolt for fixing the bracket, which is a bottomed cylindrical body, to the column is passed through a hole at the bottom of the bracket, and the mounting bolt for fixing the bracket having a bottom to the beam pipe is mounted on the beam pipe. The threaded portion of is passed through the two-step washer in the bracket, and the nut is screwed into the threaded portion. The center line of the two-step washer coincides with the bracket axis, so that the mounting bolt easily coincides with the bracket axis and becomes perpendicular to the seat surface, and the bracket is firmly tightened and fixed by the mounting bolt.

[0011]

【Example】

 An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 11 is a pillar made of a round pipe of a fence for sloping ground to be installed on a slope such as a slope, reference numeral 12 is a beam pipe made of the same round pipe as a horizontal crosspiece, and reference numeral 13 is a beam pipe 12 fixed to the pillar 11. It is a bracket for. The bracket 13 has a cylindrical shape with a bottom having a spherical bottom 13a, and a circular hole 13b is formed in the center of the spherical bottom 13a. The bracket 13 is fixed to a circular support hole 11a formed in the support 11 by a receiving metal fitting 14, a mounting bolt 15, a two-stage washer 16 of the present invention, a wing nut 17, and an annular member 18.

As shown in FIGS. 2 and 3, the receiving bracket 14 has an elongated shape and has an intermediate bolt receiving surface portion 14 a whose longitudinal section is a cylindrical surface and an upper and lower portion which contacts the inner surface of the column 11. It has a column inner surface contact portion 14c, a long hole 14b is opened from the central portion to the vicinity of the lower end, and four small protrusions 14d for preventing displacement are provided. The mounting bolt 15 is inserted into the elongated hole 14b so that the head portion 15a remains in the column 11, and the screw portion 15b is inserted into the bracket 13 from the hole 13b of the bracket 13.

The two-step washer 16 is located in the cylindrical portion 13d of the bracket 13 having a small diameter and is in contact with the inner surface of the spherical bottom portion 13a of the bracket 13, and is substantially in the inner diameter of the cylindrical portion 13d. A large diameter perforated circular plate 16b having a close outer diameter, and a cylindrical member (cylindrical member) interposed between the perforated circular plates 16a and 16b to determine the distance between the perforated circular plates 16a and 16b. 16c and.

The bladed nut 17 has a structure in which four blades 17b are integrally fixed to the outer surface portion of the hexagonal portion (a portion of a normal hexagonal nut) 17a in two directions at right angles. The annular member 18 has an annular shape so as to surround the support hole 11a, and contacts the outer surface of the bracket 13 mainly on the spherical bottom 13a with the conical surface 18a.

The end portion of the beam pipe 12 is fitted into the bracket 13, and the countersunk screw 13 is inserted through the countersunk hole 13c formed in the bracket 13 and the long hole 12a formed in the beam pipe 12 in the longitudinal direction of the beam pipe, and the washer. 21 and the nut 22 are tightened and fixed. Although detailed description is omitted, the nut 22 may be held in the elongated hole 12a portion of the beam pipe 12 by a nut holding member 23 that holds the nut 22 so that the nut 22 can move.

A nut-shaped nut driver 24 for rotating the vane nut 17 is fixed to the end of the beam pipe 12. This nut driver 24 is a combination of two ribs 25 and 26 in a cross shape (a cross shape when viewed from the left side of FIG. 1), although details thereof are omitted.

Next, a procedure for mounting work in the above beam pipe mounting structure will be described. First, outside the support column 11, the receiving metal fitting 14, the annular member 18, and the bracket 13 are aligned in the same order as in FIG. 1, and the mounting bolt 15 is attached from the side of the receiving metal fitting 14 to the elongated hole 14b of the receiving metal fitting 14 and the hole 13b of the bracket 13. Then, the two-step washer 16 is passed through the threaded portion 15b in the bracket 13 and the blade nut 17 is screwed onto the threaded portion 15b. At this time, the bracket 14 is separated from the spherical bottom 13a of the bracket 13 with a margin. In this state, the upper end of the receiving metal fitting 14 is inserted into the pillar 11 through the pillar hole 11a, the upper and lower pillar inner surface contact portions 14c are brought into contact with the inner surface of the pillar 11, and the small protrusion 14d of the receiving metal fitting 14 is attached. Positioning is performed by applying to the inner peripheral edge of the column hole 11a.

Next, the beam pipe 12 is pushed into the back of the bracket 13, and the nuts with blades 17 at the end of the beam pipe 12 are turned and tightened, and the bracket 13 is fixed to the column 11 side by the mounting bolts 15. To be done. Then, the position of the beam pipe 12 is adjusted, and the beam pipe 12 is fixed to the bracket 13 with a flat head screw 20.

In the tightening operation of the mounting bolt 15 in which the two-stage washer 16 is interposed, the center axis of the two-stage washer 16 into which the mounting bolt 15 is inserted easily coincides with the bracket axis, so that The mounting bolt 15 is easily aligned with the bracket axis and is perpendicular to the seat surface, and the bracket 13 is firmly tightened and fixed. In addition, when it is desired to position the vaned nut 17 further on the opening side (right side in FIG. 1) of the bracket 13, this can be easily dealt with by using a long cylindrical member 16c.

The two-stage washer of the present invention is not limited to the case where it is applied to the beam pipe mounting structure of the fence, and the mounting bolt passed through the center hole of the bottomed cylindrical body having the spherical bottom portion or the conical bottom portion. Therefore, it can be applied to various cases where the bottomed cylindrical body is fixed to an object to be mounted. For example, like the two-stage washer 16 'shown in FIG. 5, it can be applied to the case of mounting the bottomed cylindrical body 13' having the conical bottom portion 13'a with the mounting bolt 15 ', and the head of the mounting bolt 15'. It can also be applied to the case where it is used as a washer, and also when the screw part of the mounting bolt 15 'is directly screwed into the screw hole 30a formed in the mounting object 30.

Further, in the embodiment, the perforated circular plates 16a and 16b of the two-stage washer and the tubular member 16c are separable from each other, but they may be integrally joined by an adhesive or welding. The tubular member does not necessarily have to be cylindrical.

[0022]

[Effect of device]

 According to the two-stage washer of the present invention, the axis of the mounting bolt can be easily aligned with the center line of the cylindrical bracket with a bottom so that the mounting bolt can be perpendicular to the seat surface of the nut or bolt head. The tightening with bolts can be made sufficiently strong.

Further, since it can cope with various curvatures of the spherical bottom portion or the conical bottom portion, it is highly versatile. In addition, when it is desired to separate the position of the nut or bolt head from the spherical bottom, the length of the tubular member can be changed, which is also highly versatile.

This two-stage washer has the above-mentioned structure when it is applied to a beam pipe mounting structure in a fence in which a bottomed cylindrical bracket having a spherical bottom portion or a conical bottom portion is attached to a column with a mounting bolt. Features are effectively used.

[Brief description of drawings]

FIG. 1 is a sectional view of a beam pipe mounting structure showing an embodiment of the present invention.

FIG. 2 is a front view of the receiving fitting in FIG.

3 is a cross-sectional view taken along the line AA of the main part in FIG.

FIG. 4 is a perspective view of the two-step washer in FIG.

FIG. 5 shows another embodiment of the present invention and is a cross-sectional view of a mounting structure in which a bottomed cylindrical body having a conical bottom portion is fixed to an object to be mounted with a mounting bolt using the two-stage washer of the present invention. .

[Explanation of symbols]

 11 column (attachment target object) 12 beam pipe 13 bracket (bottomed cylindrical body) 13 'bottomed cylindrical body 13a spherical bottom 13'a conical bottom 13d cylindrical section 15,15' mounting bolt 16,16 'two-stage washer 16a, 16'a Small-diameter perforated circular plate 16b, 16'b Large-diameter perforated circular plate 16c, 16'c Cylindrical member (cylindrical member) 17 Blade nut 30 Attachment target

Claims (3)

[Scope of utility model registration request] 1. A bottomed cylindrical body having a spherical bottom portion is provided with a hole at the center of the spherical bottom portion, and is used when fixing the bottomed cylindrical body to an object to be mounted with a mounting bolt passing through the hole. A step washer, which is a small-diameter perforated circular plate that comes into contact with the inner surface of the spherical bottom part, a large-diameter perforated circular plate that is located in the cylindrical part of a bottomed cylindrical body, and is interposed between both perforated circular plates. And a tubular member that defines the distance between the circular plates with holes. 2. A beam pipe mounting structure in a fence in which a beam pipe is fixed to a support via a bottomed tubular bracket having a spherical bottom portion, wherein the two-stage washer is attached to the spherical bottom portion of the bracket. A beam-pipe mounting structure for a fence, characterized in that the bracket is directly or indirectly fixed to the column by mounting bolts inserted through the holes of the two-stage washer and the spherical bottom of the bracket . 3. The two-stage washer according to claim 1, wherein the bottom of the bottomed cylindrical body is a conical bottom instead of a spherical bottom.