JPH045532Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to variable packing for slab tracks.

(Prior art) In the construction of slab tracks, it is necessary to correct irregularities in manufacturing tolerances and construction tolerances of each member and each part to finish the track to a predetermined accuracy, and at the same time to support the rails evenly. In the rail fastening section,
A variable packing is used that can be formed to a predetermined thickness on site.

FIGS. 5 and 6 show the conventional variable packing a, which is made of a bag-like body 4 having reinforcing fibers 1 inside and having an inlet 2 with a check valve and an outlet 3. As shown in FIG. 7, a liquid resin is inserted between a tie plate c on a concrete slab b and a track pad d, and a hardening agent is added into the bag-like body 4 through the injection port 2. , exhaust the air inside the bag-like body 4 from the exhaust port 3,
After completely exhausting the air inside the bag-like body 4 and closing the exhaust port 3 with a clip, filling the bag-like body 4 with resin and inflating the bag-like body 4, the resin is cured to form the above-mentioned type. The gap between the rate c and the track pad d is completely filled, and the reinforcing fibers 1 in the bag-shaped body 4 make the cured product a reinforced plastic, thereby forming a variable packing with high strength.

(Problems to be solved by the invention) In the conventional variable packing, the variable packing moves from its fixed position on the tie plate due to the expansion and contraction of the rail, the advance of the rail due to the progress of the train, etc., resulting in a reduction in the pressure receiving surface. This also led to problems such as damage to the variable packing. That is, in conventional variable packing, the peripheral parts of the upper and lower two films 4a and 4b are formed into a bag shape by the peripheral seal part 4c. Both ends are bulged, and this has the effect of preventing the variable packing from moving, but the bulge 5 has a circular cross section, and if the rail e moves with an impact, it will move over the bulge 5, preventing movement. The prevention effect was insufficient.

(Means for solving the problem) The present invention was proposed with the aim of eliminating such drawbacks. In the variable packing for slab track, which is equipped with an injection port with a check valve and an air exhaust port for injection of plastic resin,
The present invention relates to variable packing for a slab track, characterized in that the bag-like body is provided with a plate-like body having ribs for locking the tie plate protruding from both side edges.

(Function) As mentioned above, in the variable packing according to the present invention, a plate-like body with ribs for locking the tie plate protruding from both sides of the bag-like body is housed inside the bag-like body, so that the plate-like body can be engaged with the tie plate. By firmly holding the tie plate, the stopper rib prevents the variable packing from moving, thereby eliminating the problems associated with the conventional variable packing.

(Effects of the invention) According to the invention, the ribbed plate-like body built into the bag-like body exhibits the effect of preventing the variable packing from moving, and the plate-like body is placed inside the bag-like body. It also serves as a reinforcing material for the cured injected resin, improving the durability of variable packing.

(Embodiments) The present invention will be described below with reference to illustrated embodiments.
In FIGS. 1 and 2, 14 is a bag-like body that forms the main body of the variable packing, which is formed by forming the peripheral parts of the upper and lower two films 14a and 14b into a bag-like shape with a peripheral seal part 14c. A curable resin inlet 13 with a valve 12 and an air outlet 15 are provided.

A plate-like body 16 is housed inside the bag-like body 14 and has ribs 16a extending along both side edges of the bag-like body 14 in a direction perpendicular to the surface of the bag-like body 14. .

Thus, the variable packing constructed as described above is interposed between the tie plate c on the concrete slab b and the track pad d. (See Figure 3)
In this case, due to the presence of the ribs 16a, it is difficult to insert the bag-shaped body 14 into the gap set between the tie plate c and the track pad d.
Once, lift up the rail e, insert the variable packing, and install it in a predetermined position. Next, a curable resin is injected into the bag-like body 14 through the injection port 13,
It is filled and hardened to fill the gap between the tie plate c and the raceway pad d.

At this time, the plate-like body 16 housed inside the bag-like body 14
The ribs 16a on both side edges of the tie plate c hold the tie plate c and prevent the variable packing from moving. The illustrated variable packing is, as mentioned above,
Movement is completely prevented by ribs 16a on both side edges of the plate-like body 16 housed inside the bag-like body 14,
In addition, the plate-like body 16 also serves as a reinforcing material for the injected resin to the bag-like body 14, improving the durability of the variable packing. Note that the ribbed plate-like body 16 installed inside the bag-like body 14 has ribs 16 that are engaged with the tie plate b.
Although it is necessary for the strength of a to withstand shearing loads due to rail movement, etc., the thickness of the plate-like body 16 is preferably as thin as possible so that it can cope with the case where the gap between the tie plate b and the rail e is small. Furthermore, it is desirable that the adhesive property with the liquid resin injected into the bag-shaped body 14 is good, and that the resin is integrally molded after the resin is injected and cured.

FRP is a material that satisfies these conditions.
(glass fiber reinforced plastic) plates, iron plates, etc.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view showing an embodiment of the variable packing for slab track according to the present invention, Fig. 2 is a plan view thereof, Figs. FIG. 5 is a plan view of a conventional variable packing for slab track, FIG. 6 is a longitudinal sectional view, and FIGS. 7 and 8 are longitudinal sectional views showing the state in which it is used. 12... Check valve, 13... Inlet, 14... Bag-shaped body, 15... Air outlet, 16... Plate-shaped body, 1
6a...Rib.

Claims (1)

[Scope of utility model registration request] In variable packing for slab track, in which a bag-like body interposed between a track pad and a tie plate is provided with an inlet with a check valve for injecting a curable resin and an air outlet, the bag-like A variable packing for slab track characterized by having a plate-like body internally provided with ribs for locking the tie plate protruding from both side edges.