JP2951528B2 - Temporary pipe groove lid mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for attaching a groove cover for a storage groove for a wiring or the like provided on an outer peripheral portion of a temporary pipe buried underground by a propulsion method.

[0002]

2. Description of the Related Art When laying an underground pipe such as an electric cable laying pipe, gas, or a water pipe by the propulsion method, first, a shield machine is dug from a starting shaft, and temporary pipes are sequentially added to the shield machine. The burial is buried up to the arrival shaft, and then the temporary pipe and the buried pipe are replaced. Then, when the temporary pipe is propelled, as shown in FIG. 8, after driving hydraulic hoses and wirings C for various devices are stored in storage grooves A which are recessed along the entire length of the outer circumference of the temporary pipe P. ,
It is closed by the groove cover D.

Conventionally, as a means for attaching the groove cover D, nuts N are fixed to the groove bottom of the storage groove A at regular intervals, and the groove cover D is covered over the opening end of the storage groove A. A countersunk bolt B is screwed into the nut N through a bolt insertion hole drilled in the groove cover D, and is fixed.

[0004]

However, when the wiring C is to be stored in the storage groove A, the storage groove A
The earth and sand may fall into the screw hole of the nut N and accidentally enter the screw hole. Even when the cover bolt D is put on and the countersunk bolt B is screwed into the nut N, there is a problem in that the screw cannot be completely screwed due to the earth and sand in the screw hole, which hinders the promotion of the temporary pipe. Also, if screwing it forcibly, nut N or countersunk bolt B
There is a possibility that the screw thread may be damaged and cannot be used.

For this reason, if the flathead bolt B cannot be completely screwed into the nut N when the groove cover D is mounted, the groove cover D is once removed to remove sand or the like that has entered the screw hole of the nut N. At present, it has been eliminated, and there has been a problem in that the elimination operation requires a considerable amount of time and lowers the efficiency of the temporary pipe promotion operation. SUMMARY OF THE INVENTION An object of the present invention is to provide a device for attaching a groove cover for a temporary pipe which can solve such a problem.

[0006]

In order to achieve the above-mentioned object, the invention described in claim 1 is provided in the longitudinal direction at the bottom of a storage groove for wiring or the like provided on the outer peripheral surface of the temporary pipe over the entire length. In a temporary pipe groove cover mounting device configured to fix groove cover mounting nuts at regular intervals and mount a groove cover for closing an opening end of the storage groove with a bolt screwed to the nut,
At the lower end of the screw hole of the nut, a concave groove is provided which penetrates from the screw hole to the outer peripheral surface of the nut.

According to the second aspect of the present invention, groove cover mounting nuts are provided at regular intervals in the length direction at the bottom of a storage groove for wiring or the like provided on the outer peripheral surface of the temporary pipe over the entire length. Then, in a groove cover mounting device for a temporary pipe configured to mount a groove lid for closing an opening end of the storage groove with a bolt screwed to the nut, a leg piece having an appropriate height is erected on the bottom surface of the storage groove. ,
The nut is integrally fixed to the upper end surface of the leg piece, and a concave groove is provided at the lower end of the nut or the upper end of the leg piece so that the lower end of the screw hole of the nut communicates with the storage groove. ing.

[0008]

When the wirings are stored in the storage groove provided in the outer peripheral portion of the temporary pipe, or after the wiring is stored and before the storage groove is closed by the lid, the wiring is directed toward the groove cover mounting nut provided in the groove. When air or water is blown, sand, dust, and the like, which have fallen into the screw hole of the nut, are discharged to the outside from the lower end of the screw hole through the concave groove by an air current or a water current, and the screw hole is cleaned to the lower end. For this reason, the bolt is smoothly screwed to the nut, and the mounting operation of the groove cover can be performed reliably and efficiently.

According to the invention described in claim 2,
Spraying air or water in the same manner as described above by a groove provided on at least one of the upper end of the leg set up on the bottom surface of the storage groove for wiring and the lower end of the nut fixed to the upper end surface of the leg. Not only can the sand inside the screw hole be removed, but also when the wiring is stored in the storage groove, the leg piece prevents the nut from being buried between the wiring, and the nut is opened from the wiring. When the bolt is screwed into the nut while being held in a state protruding to the vicinity of the portion, wiring can be easily and reliably screwed without hindering wiring.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 shows a nut 3 and a countersunk bolt 4 in a wiring storage groove 2 which is recessed over the entire outer peripheral surface of a temporary pipe 1 over its entire length. 2 shows a sectional view in which the groove lid 5 is mounted, and a lower end portion of the nut 3 has a central screw hole of the nut 3 as shown in FIG.
3a, a concave groove 6 having an appropriate depth and an outer end communicating with the outer peripheral surface of the nut 3 is provided. A plurality of the nuts 3 are arranged at regular intervals in the longitudinal direction of the storage groove 2. The lower end surface is fixed to the groove bottom surface of the storage groove 2 by welding or the like. Therefore, the screw hole 3 a of the nut 3 communicates with the inside of the storage groove 2 through the concave groove 6. The concave groove 6 can be formed by grooving the lower end surface of the nut 3 in a diametric direction passing through the center of the screw hole 3a with an appropriate cutting tool.

As shown in FIGS. 3 and 4, the temporary pipe 1 is provided with a survey hole 13 at the center of the front and rear end plates 11 and 12, and is arranged in the temporary pipe 1 on both sides. The front and rear open ends of the feeding and discharging pipes 14 and 15 are exposed to the outside, and the upper and lower portions of the pipes 1 such as a lubrication supply pipe and an air release pipe disposed in the temporary pipe 1 are provided.
The opening ends of 6, 17 are also opened to the outside.Furthermore, bolt fastening holes are provided at several places on the outer peripheral parts of the front and rear end plates 11, 12.
18 and a structure in which the storage groove 2 having a constant width and depth is provided in the upper peripheral portion over the entire length. The storage groove 2 cuts a fixed width portion of the upper peripheral portion of the temporary tube 1 over its entire length, and fits a groove member 2a curved in a U-shaped cross section into the cut portion, and fixes the upper ends of both side walls of the groove member 2a. It can be formed by welding to the opposite end face of the cut portion of the temporary tube 1.

The upper end surfaces of both side walls of the groove member 2a forming the opening end of the storage groove 2 have receiving surfaces 2b of both side edges of a groove cover 5 formed to have substantially the same width and length as the storage groove 2. 2b, through holes 7 for countersunk bolts 4 are formed in the center of the groove cover 5 at the same intervals as the nuts 3 in the longitudinal direction, and the periphery of the through holes 7 is bolted. It is formed on the receiving surface 7a of the head.

The temporary pipe 1 is, as shown in FIG.
The shield machine 21 is excavated from 20, and the shield machine 21 is buried up to the reaching shaft (not shown) by successively adding and following the shield machine 21. At that time, the temporary pipe 1 following the preceding temporary pipe 1 in the starting shaft 20 is connected via the bolt fastening holes 18 and 18 so that the pipe lines such as the sending and discharging mud pipes 14 and 15 are connected in series. Wirings 8 such as hydraulic hoses and cables connected to the propulsion jack of the shield machine 21 and the cutter drive motor are stored in the storage groove 2 of the temporary pipe 1 to be embedded, and the storage groove 2 is closed with the groove cover 5. , Buried underground, buried.

The device for attaching the groove cover 5 to the storage groove 2 includes the nut 3 and the flathead bolt 4 having the above-described structure. Blows air toward the nut 3 or employs an appropriate air blowing means or water spraying means to blow air or water, so that sand, dust, etc., falling into the screw hole 3a of the nut 3 Groove 6 by blowing air stream or water stream
The screw holes 3a are discharged into the storage grooves 2 and the screw holes 3a are cleanly cleaned. Thereafter, the wirings 8 are stored in the storage grooves 2, the groove lids 5 are covered, and the flathead bolts 4 are screwed into the screw holes 3 a of the nuts 3 to fix the groove lids 5.

FIG. 6 shows another embodiment of the groove cover attaching apparatus according to the present invention, in which wirings 8 provided on the upper peripheral portion of the temporary pipe 1 are shown.
On the bottom surface of the storage groove 2, leg pieces 9 shorter than the depth of the storage groove 2 are erected and fixed at regular intervals in the longitudinal direction of the storage groove 2, and a nut 3 is attached to the upper end surface of the leg piece 9. ′ Is integrally fixed by welding or the like, and a concave groove 6 ′ is provided at the connection between the leg piece 9 and the nut 3 ′ to allow the screw hole 3 a of the nut 3 ′ to communicate with the storage groove 2. Have. The other structure is the same as that of the above-mentioned groove lid attaching device, and thus the description is omitted.

[0016] As shown in FIG.
It is provided at the center of the upper end of the leg piece 9 so as to penetrate between both side surfaces of the leg piece 9 or at the lower end of the nut 3 'so as to communicate with the screw hole 3a and the outside as described above. It may be provided at least at one of the upper end of the leg piece 9 and the lower end of the nut 3 '. The shape of the leg piece 9 may be a rod-like body, a plate-like body, or an M-shaped bent shape, but it is desirable that the thickness of the storage groove 2 in the groove width direction be thin. This leg piece 9
Is set to such a size that when the nut 3 ′ is fixed to the upper end surface, the upper end surface of the nut 3 ′ reaches the vicinity of the opening end of the storage groove 2.

With this configuration, when air is blown onto the nut 3 'before or after the wirings 8 are stored in the storage groove 2 during the propulsion and embedding of the temporary pipe 1, the nut 3 Sand, dust, and the like, which have fallen into the screw holes 3a, are discharged into the storage grooves 2 through the concave grooves 6 '. After a while
The groove cover 5 is put on the open end of the storage groove 2, and the groove cover 5 is fixed by screwing the countersunk bolt 4 to the nut 3 ′ facing each through the bolt insertion holes 7 formed in the groove cover 5. .

When the groove cover is fixed, the nut 3 'is fixed to the upper end surface of the leg piece 9, so that the wiring piece 8 is stored in the storage groove 2 and the leg piece 9 is Even if the nut 3 'is buried, the nut 3' is disposed at a position protruding upward from the wires 8 so that the flat head bolt 4 can be easily attached to the nut 3 'without being obstructed by the wires 8. In addition, the screw can be securely screwed, and the groove cover attaching operation can be performed more efficiently.

[0019]

As described above, according to the apparatus for attaching a groove cover in a temporary pipe of the present invention, the bottom of a storage groove for wiring and the like provided on the outer peripheral surface of the temporary pipe over the entire length is provided at regular intervals in the length direction. A groove cover mounting nut is fixed to the nut, and a groove cover for closing an opening end of the storage groove is mounted by a bolt screwed to the nut. Since the lower end is provided with a concave groove penetrating from the screw hole to the outer peripheral surface of the nut, sand or the like which has fallen into the screw hole of the nut by blowing air or the like toward the nut from above before attaching the groove cover. And dust and the like can be easily and reliably removed from the storage groove through the concave groove.
When the bolt is screwed into the nut and the groove cover is fixed in the storage groove, the bolt is smoothly screwed into the nut without damage to the screw thread or incomplete screwing due to sand or the like as in the past. The mounting operation of the groove cover can be performed reliably and efficiently.

According to the invention described in claim 2,
A leg piece of an appropriate height is erected and fixed on the bottom surface of the storage groove, a nut is integrally fixed to the upper end face of the leg piece, and the lower end of the nut or the screw hole lower end of the nut is stored at the upper end of the leg piece. As described above, since the groove is provided with a concave groove communicating with the groove, sand or the like in the screw hole of the nut can be removed into the storage groove through the concave groove by blowing air or the like, and wiring and the like are provided in the storage groove. Can prevent the nut from being buried between the wires by the leg pieces, so that when the bolt is screwed into the nut, the wires do not become an obstacle, and The mounting operation can be performed more smoothly and reliably.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view of a groove cover attaching device,

FIG. 2 is a perspective view of a nut that is a component of the nut.

FIG. 3 is a simplified longitudinal front view of a temporary pipe,

FIG. 4 is a longitudinal sectional side view along the line XX,

FIG. 5 is a simplified side view showing a state in which a temporary pipe is propelled and buried,

FIG. 6 is a vertical sectional front view of another groove cover attaching device of the present invention;

FIG. 7 is a perspective view of a leg piece that is a constituent element thereof;

FIG. 8 is a vertical sectional front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temporary pipe 2 Wiring storage groove 3, 3 'Nut 3a Screw hole 4 Countersunk bolt 5 Slot cover 6, 6' Concave groove 7 Bolt insertion hole 9 Leg piece

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. ⁶ , DB name) E21D 9/06 301 E03F 3/04 F16L 1/00

Claims (2)

(57) [Claims] 1. A groove cover mounting nut is fixed at regular intervals in a length direction to a bottom of a storage groove for wiring or the like provided on the outer peripheral surface of the temporary pipe over the entire length, and an opening end of the storage groove is closed. In the temporary pipe groove cover mounting device configured to mount the groove cover to be screwed to the nut, a groove is formed at the lower end of the screw hole of the nut and penetrates from the screw hole to the outer peripheral surface of the nut. A grooved lid mounting device for a temporary pipe. 2. A groove cover mounting nut is disposed at regular intervals in a length direction on a bottom of a storage groove for wiring and the like provided on the outer peripheral surface of the temporary pipe over the entire length, and an opening end of the storage groove is closed. In a temporary pipe groove cover mounting device configured to mount a groove cover to be closed by a bolt screwed to the nut, a leg piece having an appropriate height is erected and fixed on the bottom surface of the storage groove, and the leg piece is fixed. A groove cover mounting device for a temporary pipe, wherein the nut is integrally fixed to an end face, and a concave groove is provided at a lower end of the nut or an upper end of a leg to allow a lower end of a screw hole of the nut to communicate with the storage groove. .