JP3187355U - Sleeve for buried pipe outer surface anticorrosion - Google Patents

Abstract

Provided is a buried pipe outer surface anticorrosion sleeve in which folding portions are easily positioned and excellent in workability.
A buried pipe outer surface anticorrosion sleeve is formed of a film molded body that is formed into a tube shape that is loosely covered with a buried pipe, is folded flat, and has creases on both side edges. The display unit 2 is provided along the length direction on the surface of the film molded body. At the time of construction, a part of the circumferential direction is folded in three layers along the outer surface of the buried pipe and fixed to the buried pipe, and the folded part 5 is the central part of the outermost layer 5C whose display part is the folded part. And is formed so as to be located at the top of the buried pipe. The display portion is provided at a predetermined position in the circumferential direction on the surface of the film molded body so that the fold line at one side edge of the film molded body can coincide with the fold line between the intermediate layer 5B and the outermost layer of the folded portion. .
[Selection] Figure 4

Description

The present invention relates to a buried pipe outer surface anticorrosion sleeve used to prevent corrosion by covering the outer surface of a metal pipe buried in the ground.
The “tube” may include a connection portion between tubes.

For example, in order to prevent corrosion of an outer surface of a buried pipe such as a ductile cast iron pipe for water supply, a sleeve formed by forming a film of polyethylene resin or the like into a tube shape is generally used.
As shown in FIG. 6, this sleeve is formed from a film molded body (101) which is formed into a tube shape that is loosely covered with an embedded pipe (P) and is folded flat to have folds (103) on both side edges. Become. A display unit (102) for displaying predetermined information is printed on the surface of the film molded body (101) with a predetermined width along the length direction.

When constructing the sleeve (101), after it is fitted around the buried pipe (P) from one end side, as shown in FIG. 7, the circumferential direction is set along the outer surface of the buried pipe (P). After folding the part into three layers, it is fixed to the buried pipe (P) with an adhesive tape (T), rubber band or the like.
Here, the folded portion (105) of the sleeve (101) prevents the sleeve (101) from being damaged by the impact of earth and sand when the buried pipe (P) is backfilled, and the display portion (102) is provided by the operator. The display part (105) is formed so as to be located at the center of the width of the outermost layer of the folded part (105) and at the top part (P1) of the buried pipe (P) so as to be easily caught by the eyes ( Patent Document 1).

  However, in the case of the conventional sleeve (101), the display position of the display portion (102) formed on the surface thereof is not particularly defined and varies depending on the manufacturer, size, etc. Therefore, it is not easy to position the folded portion (105) as described above, and skill is required for the operation.

Japanese Utility Model Publication No. 58-86994

  An object of the present invention is to provide a buried pipe outer surface anticorrosion sleeve that is easy to position a folded portion and has excellent workability.

  The sleeve for anticorrosion on the outer surface of the buried pipe according to the present invention is formed of a film molded body that is formed into a tube shape that is loosely covered with the buried pipe and is folded flatly to be creased on both side edges, and is formed on the surface of the film molded body. Is provided with a predetermined width along the length direction to display predetermined information. At the time of construction, a part of the circumferential direction is folded in three layers along the outer surface of the buried pipe. The fixing portion is fixed to the buried tube, and the folded portion is formed on the outer surface of the buried tube so that the display portion is located at the center of the width of the outermost layer of the folded portion and at the top of the buried tube. The display portion is located at a predetermined position in the circumferential direction on the surface of the film molded body so that the crease at one side edge of the film molded body can coincide with the fold between the intermediate layer and the outermost layer of the folded portion at the time of construction. Provided Those who are (claim 1).

In the case of the above-mentioned sleeve, at the time of construction, the display part should come to the top of the buried pipe after being fitted from one end around the buried pipe so that the crease on one side edge of the film molded body is on the upper side. While aligning, a part of the circumferential direction may be folded into three layers with one side edge of the film formed body having the fold as a base point of the folded portion.
Therefore, according to the buried pipe outer surface anticorrosion sleeve of this device, positioning of the folded portion at the time of construction can be easily performed by anyone without requiring skill, and the workability is improved.

  In the sleeve for anticorrosion on the outer surface of the buried pipe according to the present invention, the film molded body is located at the position corresponding to the fold between the innermost layer and the intermediate layer of the folded portion at the time of construction and immediately above the folded portion and at the uppermost portion of the folded portion. It is preferable that the sheet is further folded in two in the width direction so that a crease is formed at a portion corresponding to one side edge of the outer layer (Claim 2).

  If the film molded body is further folded in two in the width direction so that the crease is attached, it is possible to easily grasp the portion to be the folded portion at the time of construction, so that the positioning of the folded portion is further facilitated. Therefore, workability is further improved.

  In the sleeve for anticorrosion of the outer surface of the buried pipe according to the present invention, the surface of the film molded body is the portion corresponding to the fold between the innermost layer and the intermediate layer of the fold portion at the time of construction, and the fold is directly above the fold. In some cases, a folding guide display portion is provided at least one of the portions corresponding to one side edge of the outermost layer of the portion (claim 3).

  In the case of the above configuration, the portion corresponding to at least one of the outermost layer and the intermediate layer of the folded portion is demarcated by the fold line and the folding guide display portion, so that the folded portion can be easily positioned. As a result, workability is further improved.

  In addition, in the sleeve for anticorrosion on the outer surface of the buried pipe according to the present invention, an indication for alignment on the top of the buried pipe at a position corresponding to the central portion of the innermost layer of the folded portion during construction on the surface of the film molded body May be provided (claim 4).

  In the case of the construction described above, when the construction is performed, the sleeve can be easily positioned with respect to the buried pipe simply by aligning the alignment display portion on the surface of the film molded body with the top of the buried pipe, and the workability is further improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention and is a partially omitted perspective view of a buried pipe outer surface anticorrosion sleeve. FIG. 2 is a partially omitted perspective view showing a state where the sleeve of FIG. 1 is further folded. It is a perspective sectional view showing the state where the sleeve was put on the buried pipe. It is a perspective sectional view showing the construction state of the sleeve. FIG. 6 is a perspective view of a part of the buried pipe outer surface anticorrosion sleeve, showing another embodiment of the present invention. It is a partial abbreviated perspective view which shows the conventional buried pipe outer surface anticorrosion sleeve. It is sectional drawing which shows the construction state of the sleeve.

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

  1 to 5 show a first embodiment of the present invention. Referring to FIG. 1, an anticorrosion sleeve (1) for an outer surface of a buried pipe according to the present invention is formed into a tube shape that is loosely covered with the buried pipe (P) and is folded flatly to fold (31) (32 ) Is attached to the film molded body (1). On the surface of the film molded body (1), a display section (2) for displaying information related to the buried pipe (P) or the like is provided with a predetermined width along the length direction.

The use and material of the buried pipe (P) to be used for the sleeve (1) are not limited, but can be suitably used particularly for a ductile cast iron pipe for water supply.
The size of the sleeve (1) is not particularly limited. For example, a sleeve (1) having an inner diameter of 248 mm and a folding diameter of about 390 mm is used for a buried pipe (P) having a nominal diameter of 75 mm.
The film molded body (1) constituting the sleeve is usually formed into a seamless tube shape by an inflation method using low density polyethylene as a material. In this case, the film molded body (1) is folded flat in the process of being formed by the inflation method, and creases (31) and (32) are attached to both side edges.

The display section (2) is usually formed by printing predetermined items on the surface of the film molded body (1). However, the display section (2) can be formed by a method other than printing, for example, by sticking a seal on the surface of the film molded body (1).
When the buried pipe (P) is, for example, a ductile cast iron pipe for water supply, the display unit (2) has a plurality of blue belt-like displays formed at predetermined intervals along the length direction of the film molded body (2). In the frame, symbols indicating water supplies, the nominal diameter of the pipe, the abbreviation of the manufacturer name, etc. are displayed in white.

Further, as shown in FIG. 1, on the surface of the film molded body (2), a folding guide display section (41) is provided at a position that enters a predetermined distance in the width direction from the fold line (31) on one side edge. ) Is provided. This display part (41) is formed, for example, by printing a predetermined display on the surface of the film molded body (1), and is constituted by a broken line extending in the length direction of the film molded body (2) in FIG. .
The distance in the width direction from the fold line (31) on one side edge to the folding guide display part (41) is substantially equal to the width of the folded part (5) formed during construction (see FIG. 4). .
The display section (2) described above is formed so as to be positioned substantially in the middle between the fold line (31) and the folding guide display section (41).

FIG. 2 shows a state in which the film molded body (1) folded flat as shown in FIG. 1 is further folded into two in the width direction at the folding guide display part (41). is there.
As described above, when the film molded body (1) is folded, a chevron-shaped crease (34) is provided at a position where the folding guide display portion (41) is provided in the upper surface side portion of the film molded body (1). And a valley-shaped crease (33) is attached to a portion of the lower surface side portion of the film molded body (1) that overlaps the crease (34).
The valley-shaped fold line (33) is formed at a position corresponding to the fold line between the innermost layer (5A) and the intermediate layer (5B) of the folded portion (5) at the time of construction. Further, the ridge (34) on the mountain side is formed at a location corresponding to one side edge of the outermost layer (5C) of the folded portion (5).

Next, an example of the construction procedure of the sleeve (1) will be described with reference to FIGS.
First, as shown in FIG. 3, the sleeve (1) expanded in a cylindrical shape is fitted around the buried pipe (P) from one end side. At this time, the fold line (31) closer to the display section (2) is placed on the upper side.
Then, while aligning the position so that the display part (2) comes to the top part (P1) of the buried pipe (P), a part of the circumferential direction of the sleeve (1), specifically, the folds (31) (33) ( The part defined by 34) is folded along these fold lines (31), (33) and (34) so that there are a total of three layers. As a result, the sleeve (1) is reduced in diameter by a predetermined dimension so as to be along the outer surface of the buried pipe (P).
Thereafter, the sleeve (1) is fixed to the buried pipe (P) by fixing means such as an adhesive tape (T) or a rubber band (not shown).

  As described above, according to the buried pipe outer surface anticorrosion sleeve (1) of this embodiment, the folded portion (5) can be positioned very easily during construction, and can be quickly and appropriately performed even by a non-expert. It is possible to construct.

FIG. 5 shows a second embodiment of the buried pipe outer surface anticorrosion sleeve according to the present invention.
In the sleeve (10) of this embodiment, the film molded body (10) folded in the state shown in FIG. 2 is folded at a position where a valley-shaped crease (33) is attached in the surface of the lower surface portion. A guide display part (42) is provided, and at the position corresponding to the center of the width of the innermost layer (5a) of the folded part (5) at the time of construction, the top part (P1) of the buried pipe (P) is provided. An alignment display section (43) is provided.
The folding guide display section (42) is the same as the folding guidance display section (41) formed on the upper surface side portion of the film molded body (10), and is usually formed by printing.
The alignment display section (43) is also formed, for example, by printing a predetermined display on the surface of the film molded body (10). In FIG. 5, two points extending in the length direction of the film molded body (10) are formed. It is constituted by a broken line.

In the sleeve (10) of this embodiment, at the time of construction, just by aligning the position so that the positioning indicator (43) comes to the top (P1) of the buried pipe (P), the buried pipe (P ) And the folding portion (5) can be positioned more easily and reliably by using the folding guide display portion (42) as a mark.
When the folding guide display portion (42) is formed on the lower surface portion of the film molded body (10) as in this embodiment, the folding guide display portion of the upper surface portion of the film molded body (10) is formed. (41) may be omitted.

(1) (10): Sleeve for buried pipe outer surface anticorrosion (film molded body)
(2): Display section
(31) (32) (33) (34): Crease
(41) (42): Folding guidance display
(43): Positioning display
(5): Folded part
(5A): Innermost layer
(5B): Middle layer
(5C): Outermost layer
(P): buried pipe
(P1): Top of the buried pipe
(T): Adhesive tape (fixing means)

Claims (4)

It is formed of a film molded body that is molded into a tube shape that is loosely covered with an embedded pipe and is folded flatly to have creases on both side edges, and a display portion for displaying predetermined information is provided on the surface of the film molded body. It is provided with a predetermined width along the length direction. At the time of construction, a part in the circumferential direction is folded in three layers along the outer surface of the buried pipe and then fixed to the buried pipe by a fixing means. The overlapping portion is a buried pipe outer surface anticorrosion sleeve formed so that the display portion is located at the center of the width of the outermost layer of the folded portion and at the top of the buried tube.
The display portion is provided at a predetermined position in the circumferential direction on the surface of the film molded body so that the crease at one side edge of the film molded body can coincide with the fold between the intermediate layer and the outermost layer of the folded portion at the time of construction. A buried pipe outer surface anticorrosion sleeve.   The film molded body has a location corresponding to the fold between the innermost layer and the intermediate layer of the folded portion at the time of construction and a location just above the same fold and corresponding to one side edge of the outermost layer of the folded portion, respectively. The buried pipe outer surface anticorrosion sleeve according to claim 1, wherein the sleeve is further folded in two in the width direction so that a crease is formed.   Of the surface of the film molded body, the portion corresponding to the fold between the innermost layer and the intermediate layer of the folded portion at the time of construction and the one side edge of the outermost layer of the folded portion immediately above the folded portion The buried pipe outer surface anticorrosion sleeve according to claim 1, wherein a folding guide display portion is provided in at least one of the locations.   Of the surface of the film molded body, a position corresponding to the central portion of the innermost layer of the folded portion at the time of construction is provided with a display portion for alignment to the top of the buried pipe, Item 4. The buried pipe outer surface anticorrosion sleeve according to any one of Items 1 to 3.

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