JP2860522B2 - Metal fixing bracket for steel base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal fixing bracket made of a steel base material for mounting various surface materials used as finishing materials for roofs, walls, ceilings, floors and the like and fastener materials for mounting the surface materials. Things.

[0002]

2. Description of the Related Art Conventionally, as a base material for mounting various surface materials such as a roof and a wall of a building, there are many field edges 1, 2, 3 and 4 having the shapes shown in FIGS. 20 (a) to 20 (d). in use. The ridge 1 shown in FIG. 20 (a) is a commonly used structure, and has a front end surface 1a and an inner surface 1 which are bent in a U-shape inside both ends thereof.
d has not been subjected to any processing and has a smooth surface.

A field edge 2 shown in FIG. 20 (b) is a patent application filed by the applicant of the present invention as Japanese Patent Application No. Hei 5-114,086 (not disclosed), and has an inner surface bent into a U-shape inside both ends. 2
A knurled surface 5 is applied to a. As will be described later, the knurled surface 5 has a parallel tension strength when a fixing bracket (a gate-shaped T-bolt) corresponding to the knurled surface 5 is fastened.

The edge 3 shown in FIG. 20 (c) has a knurled surface 5 in the form of a saw blade continuously formed on the front end surfaces 3a of both ends bent in a U-shape. Also at the edge 3, the knurled surface 5 has a parallel tensile strength when a fixing bracket (T-bolt) arranged corresponding thereto is fastened. The edge 4 shown in FIG. 20 (d) is hot-formed, and the inner surface of a bent portion 4a bent in a U-shape is formed as an inclined surface 6 on the inside of both ends.

FIGS. 21 (a) to 21 (d) show that the edges 1, 2, 3, 4 are fixed with face materials.
Fixing brackets 10, 1 used in combination with 2, 3, 4
1, 12 and 13 are shown, and the longitudinal dimensions of the seats 11a and 12a shown in FIGS. (B) and (c) are slightly shorter than the inner width dimensions of the ridges 2 and 3 in FIG. The corners located on the diagonal line in the nut tightening direction are arced surfaces 11c and 12c.
c. FIGS. 22A to 22D show a combination structure of each edge 1, 2, 3, 4 and each of the fixing brackets 10, 11, 12, 13. FIG.

In FIG. 22 (a), the flat surface of the seat 10a of the fixing fitting 10 is in contact with the distal end surface 1a of the U-shaped bent portion of the field edge 1, and is attached to the contact surface 1b of the field edge 1. A material (hereinafter referred to as a face material) 15 is applied, and a bolt 10c of the fixing fitting 10 is inserted into a bolt hole 15a formed in the face material 15, and a nut 17 is attached to the bolt 10c via a washer 16.
To fix the face material 15 to the edge 1.

In FIG. 22 (b), the knurled surface 18 formed on the upper end surface of the gate-shaped seat 11a of the fixture 11 is engaged with the knurled surface 5 of the ridge 2 and the washer 1
The face material 15 is fixed to the ridge 2 by screwing the nut 17 to the bolt 11 b via 6.

In FIG. 22 (c), the knurled surface 18 of the seat 12a of the fixture 12 is placed on the knurled surface 5 of the ridge 3.
And the nut 17 is screwed into the bolt 12 b via the washer 16, thereby fixing the face material 15 to the field edge 3. In FIG. 22 (d), the inclined surface 20 of the gate-shaped seat 13 a of the fixing bracket 13 is applied to the inclined surface 6 of the bent portion 4 a of the edge 4, and the nut 17 is screwed into the bolt 13 b via the washer 16. By doing so, the face material 15 is fixed to the edge 4.

FIGS. 22 (a) to 22 (d) show field margins 1, 2, and 2 respectively.
Although FIG. 23 (a) to FIG. 23 (c) show the field edges and the fixing metal fittings in a state where the fixing metal fittings 3, 4 and the fixing metal fittings 10, 11, 12, 13 are ideally fastened. May occur, as shown in FIG. That is, in the case of the combination structure of FIG. 23A, the upper surface of the seat 10a
Since the tip surfaces 1a are smooth surfaces, the nut 17
Is fastened to the bolt 10c, the seat 10a rotates and the side surface 10d of the seat 10a becomes non-perpendicular to the longitudinal direction of the field edge 1, and the posture is broken and the tip surface 1a of the field edge 1a
Pressure contact. In this case, the tensile strength of the fixture 10 in the direction parallel to the vertical direction (the bolt axis direction) (that is, the longitudinal direction of the ridge 1) decreases.

The combination structure shown in FIGS. 23B and 23C has the same problem. In other words, the knurled surfaces 5, 18 are formed on the sides of the seats 11a, 12a of the fixtures 11, 12 and the ridges 2, 3, but are separated from each other before the knurled surfaces 5 and 18 are engaged with each other. Since the nut 17 is normally fastened to the bolts 11b and 12b in the state in which the nuts 17 are seated, the seats 11a and 12a rotate around the nut 17 and each knurled surface 5 as shown in FIGS. And 18 may not mesh properly. In this case, similarly, the tensile strength of the fixture 11 in the parallel direction decreases, and the tensile strength of the fixture 12 in the direction parallel to the vertical direction decreases.

In the case of FIG. 22 (d), when the nut 17 is fastened to the bolt 13b before the inclined surface 6 of the notch 4 and the inclined surface 20 of the seat 13a of the fixing bracket 13 come into contact with each other, the bolt 13b The workability of fastening is reduced due to wobbling.

[0012]

When a material to be mounted (face material) such as a wall material or a fastener material is attached to a field edge which is a steel base material as described above, it is called a T-bolt or a portal bolt. However, there is no temporary placing function for temporarily fixing the fixing bracket to a normal position. Therefore, in the case where the edge is used in the vertical direction, a method of inserting and fixing the bolts of the fixing fittings into the bolt holes of the face material is used every time of the mounting work, so that the workability is poor. Further, there is no guarantee that the bolt head of the fixing bracket is fixed at a normal position with respect to the field edge, and the situation becomes almost cantilevered, and in some cases, a fastening failure occurs and causes an accident.

On the other hand, a saw blade-shaped cut, that is, a knurled surface is formed on the contact surface between the field edge and the seat of the fixing bracket, and the greatest advantage of the interlocking method is that the longitudinal direction of the field edge and the fixing bracket The fact that the side surface of the seat is fitted at a right angle (normal posture) increases the tensile strength in the parallel direction.
If not sufficiently adjusted at the time of fastening, fastening may be performed diagonally, and the desired strength may not be obtained.

SUMMARY OF THE INVENTION An object of the present invention is to provide a metal fixing bracket made of a steel base material, which solves such a problem of insufficient fastening, secures a predetermined strength, and improves workability. It is.

[0015]

Means for Solving the Problems In order to achieve the above object, the present invention relates to a metal fixing bracket used for a steel base material having a ridged shape, comprising a seat and a spring.
Has a bolt protruding upward, and the spring has a spring plate
At both ends, go through the first bent part toward the outside
And a bolt is formed on the upper surface of the spring plate.
It has an insertion hole.
And insert the spring into the top of the seat.
The seat and the spring are integrated, and the spring
Temporary placement where the curved part of the steel is pressed against the side of the opening of the steel base material
Means is provided .

Further , the present invention provides a method for connecting a seat to a steel base material.
A knurled surface is formed on the contact surface .

Further, according to the present invention, a bolt is provided on the seat.
Recess is formed in which the bolt head fits.
It is good to be .

[0018]

According to the present invention, when the metal fixing member is mounted on the steel base member, the spring attached to the metal fixing member presses against the side surface of the opening of the steel base member, and the metal fixing member is pressed. Can be reliably temporarily placed on the steel base material, and the metal fixing bracket is maintained in the correct posture even when fastening with the nut, so that fastening failure does not occur.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 (a), (b) and (c) show a spring 21 having a basic shape of the present invention, and FIGS. 2 (a), (b) and (c) show a modified example thereof. The spring 21a is shown.

As the springs 21 and 21a, flat spring plates 22a, 22b , 22c and 22d having the shapes shown in FIGS. 4 (a), (b), (c) and (d) are used. The spring plate 22a in FIG.
The both ends of the spring plate 22b of FIG.
The spring plate 22c in FIG. 9C has an oval shape, and the spring plate 22d in FIG. 9D has a shape in which arcs are formed at four corners, and any of these spring plates may be used. .

More specifically, as shown in FIGS. 3 (a) and 3 (b), it is more preferable to provide a third bent portion 28a at the tip of the second bent portion 28. In the spring 21 shown in FIG. 1 in which any one of these spring plates 22a, 22b, 22c, and 22d is used, a bolt insertion hole 25 having a diameter about 0.1 mm larger than an effective diameter of a bolt (described later) is formed in an upper surface portion 23. Is formed. Slits 26 are formed on both sides of the upper surface portion 23 at a predetermined length, and a first bent portion 27 of about 60 degrees is formed in the vicinity of the slit 26 and at a right angle to the slit 26, and about 60 degrees at a predetermined position. The second bent portion 28 is formed to form a curved portion 29 having a substantially “U” shape as a whole. The bending radius of the first and second bent portions 27 and 28 is optimally 1 to 5 times the plate thickness.

The spring 21a shown in FIG. 2 is different from the spring 21 in that the spring 21 shown in FIG. 1 has no slit 26, but the other shape is the same as that of the spring 21 shown in FIG.

5 (a), 5 (b) and 5 (c), the spring 21 is provided with metal fixing brackets 30, 31, 32 (hereinafter, referred to as “metal”).
(Referred to simply as a fixture). In the fixture 30 of FIG. 2A, a bolt 30b is integrally formed on the upper surface of the seat 30a, or the fixing part 3 is welded.
5a, and a bolt 30b is inserted into a bolt insertion hole 25 (see FIG. 1) of the spring 21. Then, the tip of the curved portion 29 is seat 3 so as to be parallel to the short side.
A C-shaped retaining ring or clip retaining ring or ring 33 is fitted in the bolt 30b in contact with the upper surface of the spring 0a or with a slight space therebetween, in contact with the upper surface portion 23 of the spring 21. A ring or a clip retaining ring or a ring 33 is bonded to the spring 21 and fixed to the bolt 30b by a fixing portion 35b such as welding or bonding.

5 (b), a bolt 31b having a bolt head 31c is inserted into a bolt insertion hole 36 of a seat 31a, and the bolt head 31c is fixed to a lower surface of the seat 31a by welding or the like. (A)
Is different from the fixing bracket 30 of FIG. The fixing structure of the spring 21 to the fixing fitting 31 is the same as that in the case of FIG.

5 (c), the lower surface of the seat 32a is formed in an arc shape, and
Are formed with a bolt insertion hole 36 and a concave portion 37. Then, the bolt 32b is inserted into the bolt insertion hole 36, and the concave portion 3
7, the bolt head 32c is fitted.
Are fixed to the seat 32a via a fixing portion 35a such as welding or bonding, which is different from the fixing brackets 30 and 31 shown in FIGS. The fixing structure of the spring 21 to the fixing bracket 32 is the same as that of FIG.

FIG. 6 (a) shows the ridge 1 and FIG. 6 (b)
FIG. 5 (a) shows an example in which a fixing bracket 30 provided with a spring 21 is attached to the edge 1. FIG. As shown in FIG. 6 (b), when the fixing bracket 30 is temporarily placed inside the ridge 1, the second bent portion 28 of the spring 21 moves the side surface of the opening 9 of the ridge 1, specifically, Specifically, the U-shaped bent part 1
c. That is, the curved portion 29 of the spring 21
By the spring force that tries to spread on both sides of the
The second bent portion 28 and the U-shaped bent portion 1c are pressed against each other,
In addition, since the second bent portion 28 and the side of the seat 30a are parallel to each other, the seat 30a of the fixing bracket 30 is securely temporarily placed inside the field edge 1 in a normal posture.

FIGS. 7A, 7B and 7C show the seat 4
5 (a), 5 (b) and 5 (c), except that the knurled surface 18 is formed on the upper surfaces of the fixing brackets 40, 41a and 42a.
41 and 42 are shown. The spring 21 is also shown in FIG.
(A), (b), and (c) are the same. FIG. 7 (a),
The configuration shown in FIGS. 5B and 5C is equivalent to the configuration shown in FIGS.
(C) is particularly different from the knurled surface 18 and the bolts 40b, 41b, 42b between the seats 40a, 41a, 4b.
The difference is that a groove 18b parallel to the short side of 2a is provided, and the fixing structure of the spring 21 to the bolts 40b, 41b, 42b is slightly different. As shown in FIG.
(B), (c), the bolt insertion hole 2 of the spring 21
5 volts 40b (see FIG. 1), 41b, and 42b fitted
Then , the tip of the second bent portion 28 of the spring 21 is
a, 41a, and 42a are fitted into the grooves 18b on the upper surface, and a C-shaped retaining ring 38 is applied to the upper surface portion 23 of the spring 21, and the C-shaped retaining ring 38 is pressed by the bolts 40b,
The spring 21 is fixed to the seats 40a, 41a, 42a by engaging with the thread grooves of 41b, 42b. In this case, a clip retaining ring may be used. Therefore,
In the illustrated examples of FIGS. 7A, 7B, and 7C, the spring 21 is fixed to the bolts 40b, 41b, and 42b with a retaining ring, so that a fixing portion of the spring 21 by welding or bonding is unnecessary.

FIG. 8 (a) shows a field margin 3, and FIG.
FIG. 7 (a) shows an example in which a fixing fitting 40 provided with the spring 21 is attached to the edge 3. As shown in FIG. A knurled surface 5 is formed on the edge 3 at the distal end surface 3a of the U-shaped bent portion 3b. As shown in FIG. 3B, when the fixing bracket 40 is temporarily placed on the ridge 3, the knurled surface 5 of the ridge 3 is engaged with the knurled surface 18 of the seat 40 a of the fixing bracket 40. Spring 2
The second bent portion 28 is a U-shaped bent portion 3 of the edge 3.
b, that is, it is in pressure contact with the side surface of the opening 9. The curved portion 29 of the spring 21 is pressed against the second bent portion 28 and the U-shaped bent portion 3b by the action of the spring force to expand on both sides. The seat 40a is securely and temporarily placed in a normal posture inside the field edge 3, and the knurled surfaces 5 and 18 can be properly engaged with each other. Even when the ridge 3 is installed in the vertical direction, the tensile strength in the parallel direction is ensured as designed.

FIGS. 9A, 9B and 9C show seats 50a and 51, respectively.
7A and 7B are gate-shaped, and have knurled surfaces 18 on both end surfaces of the seats 50a, 51a and 52a.
Fixing fittings 50, 51, 52 which are the same as the fixing fittings 40, 41, 42 shown in (a), (b), (c) are shown. The spring 21 uses the C-shaped retaining ring 38 to secure the bolts 50b, 51
7 (a), 7 (b) and 7 (c).

FIG. 10A shows a U-shaped bent portion 2 b
Edge 2 having knurled surface 5 formed on inner surface 2a
But in FIG. (B) shows an example in which attached to the fixing bracket 50 of the spring 21 to the ceiling joist 2 is mounted is shown.
As shown in FIG. 3B, when the fixing bracket 50 is temporarily placed on the ridge 2, the knurled surface 5 of the ridge 2 and the knurled surface 18 of the seat 50a of the fixing bracket 50 are engaged. The curved portion 29 of the spring 21 and the gate-shaped seat 5
U-shaped bent portion 2b of the ridge 2 between the upright portions 50c
The second bent portion 28 of the spring 21 is in pressure contact with the U-shaped bent portion 2 b, that is, the side surface of the opening 9.

For this reason, the seat 50a of the fixing bracket 50 is securely temporarily placed in a normal posture inside the field edge 2, and the opposed knurled surfaces 5 and 18 can be properly engaged with each other. Is installed in the vertical direction, the tensile strength of the fixing bracket 50 in the parallel direction is secured as designed.

Table 1 shows the gate-shaped seat 5 shown in FIG.
10a is provided with a spring 21 attached to a fixing bracket 50 having a temporary mounting function and temporarily fixed at the center of the ridge 2 at a right angle in FIG. 10 (b), and has a gate-shaped seat 50a. Shows the results of the measurement of the parallel tensile strength performed by the inventors of the present invention for a fastener that does not have a spring 21 and is not set at a right angle to the longitudinal direction of the field edge 2 with a fixing bracket having no temporary placing function. It is. As can be understood from Table 1, the fastening with the fixture 50 having the spring 21 and having the temporary placing function is effective.

[0033]

[Table 1]

Further, as shown in FIG. 24, the inventor of the present invention arranges a hanging member 56 on a bolt 50b of a fixing bracket 50 and conducts an evaluation test of a temporary placing function using a weight 58 on a tray 57 attached to the lower end. did. As a result, it was confirmed that up to 1880 g of the knurled processing surface of the fixing edge 50 meshed with the knurled processing surface of the field edge 2, there was no displacement, and that the knurled processing surface was firmly engaged. The test results are shown in Table 2.

[0035]

[Table 2]

FIGS. 11 (a), 11 (b) and 11 (c) show bolts 60b and 61 on hot-formed gate-shaped seats 60a, 61a and 62a.
Fixtures 60, 61 and 62 to which b and 62b are connected are shown. FIGS. 9 (a), 9 (a) and 9 (b) show a structure for connecting the springs 21 to the bolts 60b, 61b, 62b using the C-shaped retaining ring 38 and a structure for coupling with the bolts 60b, 61b, 62b.
It is the same as that shown in (b) and (c). FIGS. 11 (a), (b),
In (c), the upright portions 60c of the seats 60a, 61a, 62a,
FIGS. 9 (a), 9 (b), and 9 (c) show that the inclined surface 20 is formed inside 61c and 62c and that there is no knurled surface.
This is different from the fixing brackets 50, 51, 52 of (c).

FIG. 12 (a) shows a hot-formed edge 4
11B shows an example in which a fixing bracket 60 provided with the spring 21 shown in FIG. As shown in FIG. 2B, when the fixing bracket 60 is temporarily placed inside the ridge 4, the inclined surface 6 of the U-shaped bent portion 4a of the ridge 4 and the inclined surface 20 of the seat 60a are not fixed. Are slidably pressed, and the second bent portion 28 of the spring 21 is pressed against the U-shaped bent portion 4 a of the field edge 4, that is, the side surface of the opening 9. For this reason, the seat 60a of the fixing bracket 60 is securely temporarily placed in a normal posture inside the ridge 4, and the joining surface of the fixing bracket 60 with the ridge 4 even when the ridge 4 is installed in the vertical direction. Is secured as designed in the direction parallel to.

Next, an example of use will be described. The example shown in FIG. 13 is a perspective view in which the face material 15 is attached using the ridge 2 and the fixing bracket 50. FIG. 14 is a cross-sectional view taken along the line of FIG. 13, and FIG. FIG.

First, the bezel 2 is fixed to the building main body H, and the opening 43 formed by the left and right bent pieces 2c, 2c.
The seat 50a of the fixing bracket 50 is vertically inserted into the inside of the field edge 2 through the base, and the seat 50a is rotated by 90 °, and the fixing bracket 50 is attached to the fixing bracket 50 by the expansion spring force of the curved portion 29 of the spring 21. It is temporarily placed on a predetermined inner surface of the edge 2.

Subsequently, the temporarily placed fixing bracket 50
The bent part 15c of the one face member 15 to be joined to the bolt 50b of the other is joined to the bent part 15b of the other face member 15, and the bent parts 15b and 15c of these bent parts 15b and 15c are joined together. The bolt 50b is inserted into a bolt insertion hole (not shown). After that, the bolt 50b is tightened and fixed by using the nut 17 via the washer 54. Hereinafter, the opposite ends are similarly attached, and the work of attaching the face materials 15, 15 is sequentially performed.

By such an attaching means, the knurled portions 5 and 18 are formed between the bezel 2 and the bent portions 15 b and 15 c of the face materials 15 and 15 between the fixing bracket 50 and the nut 17. They are joined by meshing with each other. For this reason, a favorable frictional force acts, and a strong mounting state can be maintained.

Further, a spring 21 is attached to the fixing bracket 50, which serves as an urging force for pressing the inner side surface of the ridge 2 so that the fixing bracket 50 can be temporarily placed on the ridge 2. And the number of steps, especially at high places, can be reduced, and safety is also improved.

The example of FIG. 16 shows an example of use of a tiled roof without a heartwood, but a metal roof having another structure can be similarly used. In this example, the field 56
. Are laid as roof surface materials 55a, 55b,... At the bottoms of the adjacent surface materials 55a, 55b via the fixing metal fittings 50 provided on the ridge 2. The face members 55a, 55b ... are joined. For this reason, similarly to the above-mentioned use example, the face materials 55a and 55b are firmly attached.

FIG. 17 shows an example of using a shelf. In this example, the ridge 2 is vertically arranged as a pillar , the bolt 50 b is inserted into a bolt insertion hole formed in the shelf frame 57, and the nut 17 is connected to the bolt 50 b via the washer 55.
To the shelf frame 57 via the fixing bracket 50.
Is firmly fixed between the ridges 2, and the shelf 5
8 are firmly supported.

FIG. 18 shows an example of an assembling structure such as a storeroom . In this example, the pillar 63 is disposed vertically, and a field edge 2d, which is a beam, and a field edge 2e, which is a base, are attached to the column 63 via the fixing bracket 50 and the mounting bracket 65, respectively. Strongly bound. In other words, Noen 2, 2
By inserting a bolt insertion hole formed in the mounting bracket 65 into the bolt 50b of the fixing bracket 50 attached to the spring 21 attached to the spring 21 and screwing the nut 17 to the bolt 50b,
The pillar 63 and the field edge 2 via the fixing bracket 50 and the mounting bracket 65
are strongly connected to each other to assemble a storeroom or the like.

The embodiment of the present invention includes a signboard, a handrail,
It can also be used for fences and the like, and FIG. 19 shows an example of a signboard. Field edge 2f which is a pillar and field edge 2g which is a shaved tree
Are assembled via a fixing bracket 50 provided with the spring 21 and a mounting bracket 67, respectively.
g, a plate 66 as a signboard is supported.

The metal fitting according to the present invention is not limited to a steel base material for attaching various surface materials used as finishing materials for roofs, walls, ceilings, floors and the like and a fastener material for mounting the surface materials, and a steel base material. It can also be used as a shelf metal member, a signboard attaching member, a fence member, a handrail member, a metal supporting bracket used for a cable supporting member, a device attaching member, and other various structural members.

[0048]

As described above, the metal fixing bracket according to the present invention has a temporary placing function on the steel base material, so that even when the steel base material is disposed vertically, the metal fixing metal can be used. It is possible to easily and surely hold the metal fixture in a correct posture, eliminate fastening errors, secure a predetermined strength for the metal fixture, and improve workability.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are a plan view, a side view, and a front view of a spring having a basic shape according to the present invention.

FIGS. 2A, 2B, and 2C are a plan view, a side view, and a front view of a spring according to a modification of FIG.

FIG. 3 is an enlarged view of a part A of FIGS. 1 and 2;

4 (a), (b), (c), (d) are plan views of a spring plate used in the present invention.

FIGS. 5A, 5B, and 5C are front views of metal fittings provided with springs.

FIG. 6A is a perspective view of a field edge, and FIG. 6B is a front view of a combination state of the field edge and a metal fixing bracket.

FIGS. 7A, 7B, and 7C are front views of other metal fittings provided with springs.

8A is a perspective view of a field edge, and FIG. 8B is a front view of the field edge and a metal fixing bracket.

FIGS. 9A, 9B, and 9C are front views of other metal fittings provided with springs.

10A is a perspective view of a field edge, and FIG. 10B is a front view of a combination state of the field edge and a metal fixing bracket.

11 (a), (b) and (c) are front views of other metal fixing fittings provided with springs.

12A is a perspective view of a field edge, and FIG. 12B is a front view of a combination state of the field edge and a metal fixing bracket.

FIG. 13 is a perspective view of a first use example of the present invention.

FIG. 14 is a sectional view taken along the line 2-2 of FIG.

FIG. 15 is a sectional view taken along the line C-C of FIG. 13;

FIG. 16 is a side view of a second use example of the present invention.

17A is a front view of a third example of use of the present invention, and FIG.
(a) is an enlarged cross-sectional view taken along the line II.

FIG. 18 (a) is a front view of a fourth usage example of the present invention, and FIG.
(a) is an enlarged cross-sectional view of the ho-ho line, and (c) is an enlarged cross-sectional view of the ho-he line of (a).

19A is a front view of a fifth use example of the present invention, and FIG.
(a) is an enlarged view of a cross-section of a toe line.

FIG. 20 (a), (b), (c), (d) are conventional
The perspective view of the edge of an example .

21 (a), (b), (c), and (d) show FIG.
FIG. 9 is a perspective view of a conventional metal fixing bracket used for each field edge of No. 0.

22 (a), (b), (c), and (d) show FIG.
FIG. 22 is a front view of a state in which each field edge of No. 0 and each metal fixing bracket of FIG. 21 are combined.

FIGS. 23 (a), (b), and (c) are explanatory views showing examples of improper fastening between the rims and metal fixing brackets of FIGS. 22 (a), (b), and (c).

FIG. 24 is an explanatory view showing an evaluation test of a temporary placement function.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Field edge 9 Opening 21 Spring 29 Curved part 30 Metal fixing bracket 30a Seat 30b Bolt 33 Retaining ring

Claims (3)

(57) [Claims] 1. A metal fixing bracket used for a steel base material having a field edge shape, comprising: a seat and a spring;
Has a bolt protruding upward, and the spring has a spring plate
At both ends, go through the first bent part toward the outside
And a bolt is formed on the upper surface of the spring plate.
It has an insertion hole.
And insert the spring into the top of the seat.
The seat and the spring are integrated, and the spring
Temporary placement where the curved part of the steel is pressed against the side of the opening of the steel base material
A metal fixing bracket made of steel base material, characterized by comprising means . 2. A knurled surface on a contact surface of the seat with a steel base material.
2. The processing surface is formed.
Metal fixing bracket of steel base material . 3. A recess for preventing a bolt from rotating is formed in a seat.
The bolt head is fitted into this recess
Metal fixing of the steel base material according to claim 1 or 2.
Metal fittings .