JPH0419059Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a track bridge sleeper fastening fitting for fastening track bridge sleepers to a bridge girder.

(Prior Art) A conventional track bridge sleeper fastening fitting 1 includes a hook bolt 3 having a hook portion 3A to the bridge girder 2 at the lower part, as shown in FIGS. 5 and 6A and B, and the hook bolt 3 is attached to the bridge girder 2. Bridge sleeper 4 for the track above 2
The hook portion 5A of the washer 5 is inserted into the bridge sleeper 4 from below to prevent the hook portion 3A from coming off the bridge girder 2, and the screw portion 3C of the hook bolt 3 is inserted into the bridge sleeper 4 from below.
A key groove 3B is provided in the key groove 3B, a convex portion 5C on the inner surface of the bolt through hole 5B of the washer 5 is fitted into the key groove 3B, and a nut 6 is screwed into the threaded portion 3C and tightened to connect the bridge sleeper 4 to the bridge girder 2. It was fixed at In addition, 7
is a track supported by bridge sleepers 4.

(Problems to be solved by the invention) However, such a structure has the following problems.

(a) If the bridge sleepers 4 are corroded, the hook bolts 3
The anti-rotation action of the claw portion 5A of the washer 5 that fits into the washer 5 is eliminated, the hook bolt 3 rotates even with a weak vibration, and the hook portion 3A is removed from the bridge girder 2.

(b) If the bridge sleeper 4 is corroded when retightening the nut 6 due to loosening due to vibration, the hook portion 5A of the washer 5 will not bite, making the hook bolt 4 easy to rotate.

An object of the present invention is to provide a track bridge sleeper fastening fitting that can prevent the hook portion of a hook bolt from coming off the bridge even if corrosion occurs in the track bridge sleeper.

(Means for solving the problem) The structure of the present invention to achieve the above purpose is as follows:
1 A to G to 4 A to I corresponding to the embodiments
To explain with reference to , the present invention provides a track bridge sleeper fastening fitting 1 for fastening a track bridge sleeper 4 to a bridge girder 2, which includes a hook bolt 3 having a hook portion 3A to the bridge girder 2 at the lower part, and the hook bolt 3
There is a non-rotating parallel surface 3D- under the threaded part 3C.
A neck portion 3D having a shape P is provided on the neck portion 3D of the hook bolt 3, and is engaged with the anti-rotation parallel surface 3D-P of the neck portion 3D while being supported by riding on the bridge sleeper 4. Parallel surface 8A to prevent rotation
- A locking fitting 8 having a bolt through hole 8A with a P is fitted into the locking fitting 8. Cervical 3D
The parallel detent surfaces 3D-P and 8A-P are mutually parallel to each other.
Bolt introduction opening 8 for engaging and fitting
B is provided, and the locking fitting 8 has both locking portions 9 to prevent the locking fitting 8 from escaping from the hook bolt 3 through the bolt introduction opening 8B.
A, 9B are locked to the locking portion 8C of the locking metal fitting 8 and the side surface 4A of the bridge sleeper 4, and are prevented from coming off by the locking metal fitting 9 fitted to the hook bolt 3. Screw part 3C
includes the retaining metal fitting 9 and the rotation preventing metal fitting 8.
A nut 11 that tightens the bridge sleeper 4 through
It is characterized by being screwed together.

(Function) In this way, the hook bolt 3 is prevented from rotating by the parallel anti-rotation surface 3D-P of the neck 3D of the hook bolt 3, and the bolt through hole with the parallel anti-rotation surface 8A-P that is engaged with this. This is done by a detent fitting 8 having a diameter of 8A. Both locking portions 9 of the locking fitting 9 are provided to prevent the locking fitting 8 from slipping out from the hook bolt 3 through the bolt introduction opening 8B.
A, 9B are locked to the locking portion 8C of the detent fitting 8 and the side surface 4A of the bridge sleeper 4 to prevent them from coming off. Therefore, even if the bridge sleepers 4 corrode, the hook portions 3A of the hook bolts 3 will not come off the bridge girder 2. In this case, the locking part 9B of the metal fitting 9 is locked to the side surface 4A of the bridge sleeper 4, so that the locking effect can be maintained as long as the bridge sleeper 4 is not completely corroded. I can do it.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. Figures 1A to 3 are the first diagrams of the present invention.
This shows an example. As shown in the figure, the track bridge sleeper fastening fitting 1 of this embodiment has a bridge girder 2 at the bottom.
a hook bolt having a hook portion 3A to the
The hook bolt 3 is provided with a neck portion 3D having a rotation preventing parallel surface 3D-P below the threaded portion 3C. This neck part is supported by a non-rotating parallel surface 3D of the neck part 3D while being supported by riding on the bridge sleeper 4.
-P is fitted with a detent fitting 8 having a bolt through hole 8A with a detent parallel surface 8A-P. This anti-rotation fitting 8 has a bolt through hole 8A that engages the parallel anti-rotation surfaces 3D-P and 8A-P with the neck 3D of the hook bolt 3 from the side parallel to the parallel anti-rotation surfaces 8A-P. A bolt introduction opening 8B for fitting in a continuous manner with the bolt through hole 8A is provided. The bolt introduction opening 8B of this embodiment is formed as a through hole larger than the diameter of the hook bolt 3. The detent fitting 8 is configured to prevent the detent fitting 8 from escaping from the hook bolt 3 through the bolt introduction opening 8B.
The locking parts 9A and 9B are engaged with the locking part 8C of the locking metal fitting 8 and the side surface 4A of the bridge sleeper 4, and the locking metal fitting 9 fitted into the hook bolt 3 using the hole 9C prevents it from coming off. has been done. A nut 11 is screwed into the threaded portion 3C of the hook bolt 3 via a washer 10, and the bridge sleeper 4 is tightened via a retaining metal fitting 9 and a rotation preventing metal fitting 8.

In such a track bridge sleeper fastening fitting 1, the rotation of the hook bolt 3 is prevented by connecting the anti-rotation parallel surface 3D-P of the neck portion 3D to the anti-rotation parallel surface 3A-P of the bolt through hole 8A of the anti-rotation fitting 8. This is done by engaging. By using the bolt introduction opening 8B for fitting the bolt through hole 8A with the anti-rotation parallel surface 8A-P into the anti-rotation parallel surface 3D-P neck portion 3D of the hook bolt 3, the anti-rotation fitting 8 is reversely inserted. In order to prevent it from slipping out from the hook bolt 3, the locking fitting 8 is prevented from coming off by a locking fitting 9. This type of retaining is achieved by locking the locking portion 9A of the locking fitting 9 with the locking portion 8C of the detent fitting 8, and locking the locking portion 9B with the side surface 4A of the bridge sleeper 4. It is being said. The locking portion 9B is formed longer than the locking portion 9A in order to be locked to the side surface 4A of the wooden bridge sleeper 4.

4A to 4I show a second embodiment of the present invention. In this embodiment, the detent fitting 8 is U-shaped, and the bolt introduction opening 8B communicating with the bolt through hole 8A is formed as an outward opening. Accordingly, the hole 9C of the stopper fitting 9 has a D-shape so that the stopper fitting 8 can be fitted therein. In this embodiment, a portion of the circumferential surface of the hole 9C also serves as the locking portion 9A that prevents the rotation stopper 8 from coming off. In order to prevent the rotation stopper 8 from protruding from the hole 9C of the stopper metal 9,
A presser plate 12 is placed on both of them. The holding plate 12 is fitted onto the hook bolt 3 using the hole 12A. Other configurations are similar to those of the first embodiment.

(Effects of the invention) As explained above, in this invention, a parallel surface for preventing rotation is provided at the neck under the threaded part of the hook bolt.
A locking metal fitting having a bolt through hole with a parallel locking surface is attached to this neck with a parallel locking surface by engaging the parallel locking surfaces of each other, so that the lock bolt can be reliably prevented from rotating. can. Since the detent fitting is provided with a bolt introduction opening communicating with the bolt through hole, the detent fitting can be easily attached to the hook bolt. Furthermore, since the detent metal fitting is prevented from coming off by the detent metal fitting, it is possible to prevent the detent metal fitting from coming off from the hook bolt through the bolt introduction opening. Moreover, since the detent fitting itself is fixed to the side of the bridge sleeper,
It can be stopped from rotating. In addition, by locking the bridge sleeper to the side surface of the bridge sleeper in this manner, even if the surface of the bridge sleeper corrodes, the locked state can be maintained as long as the entire surface of the bridge sleeper does not corrode.

[Brief explanation of the drawing]

FIG. 1A is a vertical cross-sectional view of a first embodiment of the metal fitting according to the present invention, FIG. 1B is a cross-sectional view taken along line A-A in FIG. 1A,
Figure 1C is a side view of the neck of the hook bolt used in this example, Figures 1D and E are side and plan views of the locking fitting used in this example, Figures 1F,
G is a side view and a plan view of the retaining metal fitting used in this example. FIGS. 2 and 3 are a side view and a cross-sectional view of this embodiment in use. FIG. 4A is a vertical sectional view of a second embodiment of the metal fitting according to the present invention;
Figure 4B is a sectional view taken along line B-B of Figure 4A, Figure 4C
4 is a side view of the neck of the hook bolt used in this example, FIGS. 4D and E are a side view and a plan view of the detent fitting used in this example, and FIGS. 4F and G are this example. Figures 4H and 4I are a side view and a plan view of the retaining metal fitting used in this embodiment. FIG. 5 is a longitudinal sectional view of a conventional metal fitting in use, and FIGS. 6A and 6B are a plan view and a side view of a conventional washer. 1...Track bridge sleeper fastening fittings, 2...Bridge girder,
3...Hook bolt, 3A...Hook part, 3C...
...Threaded part, 3D... Neck, 3D-P... Parallel part for preventing rotation, 4... Bridge sleeper, 4B... Hole, 6... Nut, 7... Track, 8... Preventing metal fitting, 8A...
...Bolt through hole, 8A-P...Parallel part to prevent rotation,
8B... Bolt introduction opening, 8C... Locking part, 9
...Keeping metal fitting, 9A, 9B...Locking part, 9C
...hole.

Claims (1)

[Scope of utility model registration request] A track bridge sleeper fastening fitting for fastening a track bridge sleeper to a bridge girder includes a hook bolt having a hook portion to the bridge girder at a lower part, and the hook bolt has a neck portion having a rotation-preventing parallel surface under the threaded portion. The neck of the hook bolt is provided with a bolt through hole with a parallel non-rotating surface that is engaged with the parallel non-rotating surface of the neck while being supported on the bridge sleeper. A locking fitting is fitted into the locking fitting, and the bolt through hole is fitted to the neck of the hook bolt from a side parallel to the locking parallel surface by engaging the rotation locking parallel surfaces thereof. A bolt introduction opening is provided for the locking fitting, and the locking fitting connects both locking portions to the locking portion of the locking fitting and the bridge so that the locking fitting does not escape from the hook bolt through the bolt introduction opening. A nut is fixed to the side surface of the sleeper and is prevented from coming off by a stopper fitting fitted to the hook bolt, and a nut is attached to the threaded portion of the hook bolt to tighten the bridge sleeper via the stopper fitting and the rotation stopper. A track bridge sleeper fastening fitting, characterized in that these are screwed together.