JPH07127003A - Bolt locking metal fitting - Google Patents

Abstract

PURPOSE:To simplify the mounting work of a bolt locking metal fitting and make the reuse after removal possible so as to reduce the cost of maintenance- of-way work. CONSTITUTION:Carbon tool steel of high carbon content and 0.5-0.7mm in thickness is used as the material of a bolt locking metal fitting 10. This bolt locking metal fitting 10 is provided with a flat part 13 with a hole 12 to be fitted to the outer periphery of the head of a bolt, a pair of mutually opposed elastic mounting parts 14 integrally provided at both end parts of the flat part 13, and a pair of lug parts 15 integrally provided at both elastic mounting parts 14 so as to elastically deform both elastic mounting parts 14 to enlarge the space. Twelve V-shape cutout parts 11 engaged with the bolt head angular parts so as to impede the rotation of the bolt are formed at 30 deg. intervals at the inner periphery of the hole 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bolt locking metal fitting used in a rail fastening device for fixing a rail to a sleeper.

[0002]

2. Description of the Related Art FIG. 8 is a plan view of a conventional bolt fastening device of a rail fastening device, FIG. 9 is a perspective view of a bolt fastening device of a rail fastening device of FIG. 8, and FIG. 10 is a bolt fastening device of FIG. It is a perspective view of a rail fastening device before mounting.

As shown in FIG. 10, sleepers (PC sleepers) 1
01, a tie pad 102 for cushioning is laid, and a rail 103 for railroad is placed on the tie pad 102.
A spring clip 1 is fixed to the leg of the rail 103 as a fixing member.
04 is engaged, and by fixing the spring clip 104 to the sleeper 101 with a bolt (hexagonal bolt) 105,
Rails 103 are fastened to the sleepers 101.

The spring clip 104 is fitted with a bolt loosening stopper fitting 110 for preventing the bolt 105 from loosening.

As shown in FIGS. 8 and 9, the bolt loosening prevention fitting 110 has a flat portion 113 in which a hole 112 to be fitted around the head portion 105a of the bolt 105 is formed, and both end portions 113a of the flat portion 113. Is provided integrally with the flat portion 1
13 includes a pair of mounting portions 114 that hang down from both end portions 113a of the member 13 so as to face each other. At the inner periphery of the hole 112, the corner portion 10 of the outer periphery of the head 105a of the bolt 105 is formed.
Twelve V-shaped notches 111 that engage with 5b and prevent rotation of the bolt 105 are formed at intervals of 30 degrees.

To mount the bolt loosening prevention fitting 110, as shown in FIG. 10, the head 105a of the bolt 105 is attached.
Corners 105b and holes 11 of bolt loosening stopper 110
Bolt 105 so that the V-shaped notch of 2 is aligned.
Loosen or tighten. When they match, the bolt loosening prevention fitting 110 is attached to the spring clip 104.
The hole 112 is fitted into the head portion 105a of the bolt 105 by being pressed against. As a result, the mounting portion 114 of the bolt loosening prevention fitting 110 clamps both side surfaces 104a of the spring clip 104, and the bolt loosening prevention fitting 110 cannot be easily separated from the spring clip 104.

[0007]

However, the material of the above-mentioned bolt loosening stopper 110 is generally 1,6 mm.
Since low carbon steel with a certain thickness is used, it has the advantage that it is difficult to deform, but as described above, it is necessary to loosen or tighten the bolt 105 at the time of mounting, so the mounting work Is complicated, and when the rail 103 is replaced due to wear, the bolt loosening stopper 110 must be temporarily removed using a jig, but when removed, the mounting portion 114 becomes wider. There is a problem in that the bolt loosening prevention fitting 110 cannot be reused because it is plastically deformed.

The present invention has been made in view of the above circumstances, and its object is to simplify the mounting work and
It is an object of the present invention to provide a bolt locking metal fitting that can be reused after being removed, and can reduce the cost for track maintenance work.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned problems, a bolt locking metal fitting according to a first aspect of the present invention uses a fixing member engaged with a rail and a bolt for a sleeper on which the rail is laid. By being fixed by being used in a rail fastening device that fastens the rail to the sleeper, a flat portion having a hole formed to fit on the outer periphery of the head of the bolt,
A pair of elastic mounting portions that are integrally provided at both ends of the flat portion and that hang down from the both end portions so as to face each other, and fit the hole of the flat portion with the head portion of the bolt. In the bolt loosening prevention metal fitting, which is mounted so as to sandwich the pair of elastic mounting portions between the fixing members, and which prevents loosening of the bolts, a knob portion is further provided at a lower end portion of each of the pair of elastic mounting portions. The space between the elastic mounting parts can be increased.

The bolt loosening metal fitting according to the second aspect of the invention extends from the lower end of each of the elastic mounting portions to above the flat portion so as to face each other on the outside of each of the pair of elastic mounting portions. It is set up.

Further, in the bolt loosening stopper according to the present invention, the bolt is a hexagonal bolt, and the hole formed in the flat portion is fitted to the outer circumference of the head of the hexagonal bolt. It has 18 V-shaped notches.

[0012]

As described above, since the pair of elastic mounting portions are respectively provided with the knob portions so that the distance between the pair of elastic mounting portions can be widened, the side surfaces of the elastic mounting portion and the fixing member can be improved when mounting. There is a gap between and, loosening the bolt,
The outer periphery of the bolt head and the hole of the flat portion can be fitted to each other without tightening.

Further, when the rails are replaced due to wear, the bolt loosening prevention metal fittings can be easily and directly removed from the leaf spring member by hand without using a jig, and even if they are removed, plastic deformation is not caused.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a bolt loosening prevention metal fitting of a rail fastening device according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a mounted state of the bolt loosening prevention metal fitting of FIG.

As shown in FIG. 2, a tie pad 2 for cushioning is laid on a sleeper (PC sleeper) 1, and a rail 3 for a railway is mounted on the tie pad 2. A spring clip 4 is engaged with a leg portion of the rail 3 as a fixing member, and the rail 3 is fastened to the sleeper 1 by fixing the spring clip 4 to the sleeper 1 with a bolt (hexagonal bolt) 5. The spring clip 4 is equipped with a bolt loosening stopper 10 for preventing the bolt 5 from loosening.

As the material of the bolt loosening prevention fitting 10, carbon tool steel (S65-A or SK5) having a high carbon content is used and has a thickness of 0.5 to 0.7 mm. As shown in FIG. 1, the bolt loosening stopper 10 includes a head 5 of the bolt 5.
A rectangular flat portion 1 having a hole 12 that fits around the outer periphery of a
3 and a pair of elastic mounting portions 14 that are integrally provided on both end portions 13a of the flat portion 13 and that hang down so as to face each other,
The lower end portions 14a of the respective elastic mounting portions 14 are disposed so as to face each other on the outside of the pair of elastic mounting portions 14.
And a pair of knob portions 15 extending in the direction. The knob portion 15 extends from the lower end portion 14a of the elastic mounting portion 14 to a position above the flat portion 13, and by sandwiching both the knob portions 15 with fingers, the elastic mounting portions 14 are elastically deformed and the distance therebetween is increased. It can be easily unfolded.
Twelve V-shaped notches 11 that engage with the corners 5b of the head 5a of the bolt 5 and prevent the bolt 5 from rotating are formed on the inner periphery of the hole 12 at intervals of 30 degrees.

In order to mount the bolt loosening prevention metal fitting 10, the both knob portions 15 are sandwiched by fingers to elastically deform both elastic mounting portions 14 to widen the gap, and in this state, the hole 12 of the bolt loosening prevention metal fitting 10 is opened. The bolt 5 is fitted to the head portion 5a, and the fingers are separated from the knob portions 15. When the fingers are released, both elastic mounting portions 14 sandwich both side surfaces 4a of the spring clip 4 by their elasticity, and the bolt loosening stopper 10 is mounted.

At this time, the bolt loosening prevention fitting 10 is
As shown in FIG. 3, the spring clip 4 is mounted in a tilted state, but since both elastic mounting portions 14 sandwich both side surfaces 4a of the spring clip 4 by their own elasticity, a bolt loosening stopper The spring 10 does not come off from the spring clip 4.

After the bolt loosening prevention fitting 10 is attached, the bolt 5 rotates in the loosening direction (arrow direction in FIG. 3) as time passes, and the bolt loosening prevention fitting 10 also moves from the inclined position shown in FIG. It rotates and the interval between both elastic mounting portions 14 becomes the shortest, that is, the entire inner surface of both elastic mounting portions 14 abuts on both side surfaces 4a of the spring clip 4 (the state shown in FIG. 2), and the bolt loosens. The stopper 10 prevents the bolt 5 from rotating in the most stable state, and the bolt 5 does not loosen any more.

The bolt loosening stopper 10 can be removed simply by sandwiching both knob portions 15 with fingers and elastically deforming both elastic mounting portions 14 and widening the gap between the two side faces 4a of the spring clip 4. It can be removed.

According to the bolt loosening prevention fitting 10 of this embodiment, it is not necessary to loosen or tighten the bolt 5 at the time of mounting, so that the mounting work is simplified.

Further, when the rail 3 is replaced due to wear, the bolt loosening stopper 10 can be easily removed by hand without using a jig, and the spring clip 4 can be easily removed.
Since the bolt loosening prevention metal fitting 10 is not plastically deformed even if it is removed, the bolt loosening prevention metal fitting 10 can be reused, and the cost required for wire maintenance can be reduced.

FIG. 4 is a perspective view of a bolt loosening prevention fitting of a rail fastening device according to another embodiment of the present invention, and FIG.
4 is a perspective view of the bolt loosening prevention metal fitting, FIG. 6 is a perspective view showing a usage state of the bolt loosening prevention metal fitting of FIG. 4, and FIG. 7 is an enlarged plan view showing a usage state of the bolt loosening prevention metal fitting of FIG.

The bolt loosening prevention fitting 20 of this embodiment
As shown in FIGS. 4 and 5, there are 18 V-shaped notches 21 on the inner periphery of the hole 22 for engaging the corners 5b of the head 5a of the bolt 5 to prevent the bolt 5 from rotating. 1 in that they are formed at intervals of 20 degrees, and that round-bottom holes 25a for preventing slippage are provided at the upper ends of both knob portions 25, respectively.
Is different from the embodiment described above.

According to the bolt loosening prevention metal fitting 20 of this embodiment, the rotation of the bolt 5 is prevented at the inner circumference of the hole 22.
Since the individual V-shaped notches 21 are formed at intervals of 20 degrees, it is possible to fit the corners 5b of the head 5a of the bolt 5 at the time of mounting without widening the intervals between the elastic mounting portions 24. Can be combined, and the installation work becomes easier,
The inclination angle of the bolt loosening prevention fitting 20 attached to the spring clip 4 in a tilted state becomes smaller than that of the bolt loosening prevention fitting 10 of the embodiment of FIG. 1, whereby the normal attachment state shown in FIG. 7 is obtained. That is, it is easy to realize the most stable state of the bolt loosening prevention fitting 20.

Further, in the above-described embodiment, since the round holes 25a for preventing slippage are provided at the upper end portions of both the knob portions 25, respectively, it is possible to prevent the fingers from slipping when the both knob portions 25 are sandwiched by the fingers. The work can be done easily even with gloved hands.

[0028]

As described above, according to the bolt locking metal fitting of the present invention, the bolt can be loosened at the time of mounting,
Since there is no need to tighten it, the installation work is easy.

Further, when removing the bolt loosening prevention metal fittings when replacing the rail, etc., the bolt loosening prevention metal fittings can be easily and directly removed from the fixing member by hand without using a jig, and even if they are removed, there is plasticity. Since it is not deformed, it can be reused and the cost required for track maintenance can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view of a bolt loosening prevention fitting according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a usage state of the bolt loosening prevention fitting of FIG.

FIG. 3 is an enlarged plan view showing a usage state of the bolt loosening prevention fitting of FIG. 1.

FIG. 4 is a plan view of a bolt locking member according to another embodiment of the present invention.

FIG. 5 is a perspective view of the bolt loosening prevention fitting of FIG. 4.

6 is a perspective view showing a usage state of the bolt loosening prevention metal fitting of FIG. 4;

FIG. 7 is an enlarged plan view showing a usage state of the bolt loosening prevention metal fitting of FIG. 4;

FIG. 8 is a plan view of a conventional bolt loosening prevention fitting.

9 is a perspective view of the bolt loosening prevention metal fitting of FIG. 8;

FIG. 10 is a perspective view of the rail fastening device before the bolt loosening prevention fitting of FIG. 8 is attached.

[Explanation of symbols]

 1 Sleepers 3 Rails 4 Spring Clips 5 Bolts 5a Head 5b Corners 11 Notches 12 Holes 13 Flats 14 Elastic Mounts 15 Knobs

Claims (3)

[Claims] 1. The head of the bolt used for a rail fastening device that fastens the rail to the sleeper by fastening the fixing member engaged with the rail to the sleeper on which the rail is laid, using a bolt. And a pair of elastic mounting portions that are integrally provided at both end portions of the flat portion and that hang down from the both end portions so as to face each other. In a bolt loosening prevention metal fitting that fits the hole of the flat portion and the head of the bolt and sandwiches the pair of elastic mounting portions between the fixing members, and prevents loosening of the bolt, A bolt loosening prevention fitting characterized in that a tab portion is further provided at a lower end portion of the elastic mounting portion so that a space between the pair of elastic mounting portions can be widened. 2. The knob portion is extended from the lower end portion of each of the elastic mounting portions to above the flat portion so as to face each other on the outside of each of the pair of elastic mounting portions. The bolt locking metal according to claim 1. 3. The bolt is a hexagon bolt, and the hole formed in the flat portion has 18 V-shaped notches that fit into the outer circumference of the head of the hexagon bolt. The bolt locking metal according to claim 1.