JPH0718602A - Tie plug - Google Patents

Abstract

PURPOSE:To eliminate the entrainment and residual of air in embedding a tie plug by forming an axial groove on the outer peripheral surface of a tubular body of bar-like body. CONSTITUTION:Grooves 2a, 2b are engraved axially in the outer peripheral surface of a tubular or bar-like tie plug bodies 1a, 1b having as a material a synthetic wood made of a long glass fiber reinforced hard urethane resin foam body over the whole length of these bodies. Since the grooves 2a, 2b provide air paths to emit the air through the air path in a hole, the air is prevented from being left or entrained in the hole or adhesives. Thus, a large force is not needed to drive the tie plug without floating up of the tie plug until the adhesives are hardened and reducing the bonding force.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an embedding plug which is embedded in a hole of a sleeper and used for attaching a screw nail or the like.

[0002]

2. Description of the Related Art In order to screw rail fixing screw nails and the like into a sleeper laid on a train track, a tubular embedding plug having an internal thread engraved on its inner surface is embedded. In addition, when rehabilitating the track, a rod-shaped embedding plug may be embedded in the sleeper so as to drive a new dog nail into the sleeper so that a new dog nail or the like that has been previously opened can be buried (Actual Kaihei 3-65703). Issue).

These embedding plugs are holes made in the sleepers,
Although it is fixed to the hole traces of dog nails, etc. with a reactive adhesive such as an epoxy adhesive, when the embedding plug is driven in, air is easily caught in the adhesive liquid or the air in the holes is likely to remain. In this way, if air is entrapped or remains, it requires a large amount of force to drive the embedding plug, or the embedding cap may float up due to the air until the adhesive cures after driving. There was a problem of being lost. Further, there is a problem that if air remains in the adhesive, the bonding strength is reduced.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to provide an embedding plug free from air entrapment or air remaining when embedding the embedding plug. To aim.

[0005]

The embedding plug of the present invention is characterized in that an axial groove is formed on the outer peripheral surface of a cylindrical body or a rod-shaped body.

The material of this plug is not particularly limited,
Usually polyethylene, polypropylene, nylon, FR
A plastic such as P is preferably used. In addition, in a rod-shaped embedding plug for filling holes such as dog nails, so-called synthetic wood such as thermosetting resin foam reinforced with long fibers such as glass roving is preferably used. To be

A plurality of axial grooves may be provided. The embedding plug of a tubular body is usually engraved with an internal thread for screwing a screw nail on the inner surface, but may be engraved with a ring-shaped or spiral groove on the outer surface. The groove on the outer peripheral surface is preferable because it improves the adhesion with the adhesive and contributes to the rotation prevention of the embedding plug.

[0008]

[0009]

In the embedment plug of the present invention, the groove in the axial direction serves as an air passage on the outer peripheral surface, and the air in the hole exits through this air passage. Therefore, air remains in the hole or in the adhesive, No more getting caught up. Therefore, a large force is not required to drive the embedding plug, and the embedding plug does not float up before the adhesive is cured. In addition, the bonding strength will not decrease.

[0010]

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

FIG. 1 is a perspective view of an embodiment of a rod-shaped embedding plug for burying a previously opened dog nail or the like, and FIG. (B) shows a round bar-shaped plug. In FIG. 1, 1a and 1b are embedded plug bodies, which are made of synthetic wood made of long glass fiber reinforced hard urethane resin foam. Embedded plug body 1a, 1
On the outer periphery of b, axial grooves 2a and 2b are formed over the entire length thereof. The grooves 2a and 2b may be engraved in two or more lines.

FIG. 2 is a perspective view of an embodiment of a tubular embedding plug having internal threads engraved therein for screwing a rail fixing screw nail or the like. In FIG. 2, reference numeral 1c is a cylindrical plug body, which is made of polyethylene, polypropylene, nylon, F
It is made of plastic such as RP. A female screw 3 for screwing a screw nail to the inner surface of the embedding plug body 1c.
Is engraved. Further, a spiral groove 4 is engraved on the outer circumference, and a groove 2c is also engraved in the axial direction over the entire length thereof. This groove 2c may be carved with two or more threads, as in the case of the rod-shaped embedding plug described above.

Next, a usage mode of the embedding plug shown in FIG. 2 will be described.

As shown in FIG. 3, an embedding plug body 1c is embedded in a hole 6 formed in a predetermined portion of the sleeper 5 through a reactive epoxy adhesive 7. At this time, the air in the reactive epoxy adhesive 7 escapes upward through the groove 2c, so that there is no air entrapment and no air remains, and the adhesive 7 is cured and the embedding plug body 1c is fixed to the sleeper 5. It is.

[0015]

As described above, in the embedding plug of the present invention, since the groove formed in the axial direction prevents air from remaining or being trapped, a large force is required for driving the embedding plug. The embedding plug does not rise before the adhesive hardens. Further, the joining force does not decrease, and it can be firmly fixed to the sleeper or the like.

[Brief description of drawings]

1 shows an embodiment of a rod-shaped embedding plug of the present invention, FIG. 1 (a) is a perspective view of a round rod-shaped embedding plug, FIG.
FIG. 3 is a perspective view of a square rod-shaped embedding plug.

FIG. 2 is a partially cutaway front view of a tubular embedding plug.

FIG. 3 is a cross-sectional view showing an embedded state of the embedding plug of FIG.

[Explanation of symbols]

 1a, 1b, 1c Embedded plug body, 2a, 2b, 2c Axial groove, 3 Female screw 5 Sleeper 7 Epoxy adhesive

Claims (1)

[Claims] 1. A plug according to claim 1, wherein an axial groove is formed on the outer peripheral surface of the cylindrical body or the rod-shaped body.