JPH0547045U - Mounting structure for short tube with ribs on manhole - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] A structure for mounting a short tube with ribs that can be installed on the side wall of the manhole with excellent waterproofness and pullout strength. provide. [Structure] A tip portion of a ribbed short pipe A to which a saddle 2 is attached is inserted into a hole 51 of a side wall of a manhole, and the saddle 2 is fixed to an outer surface of the side wall of the manhole. It is characterized in that each rib is cut, and the bonding material 7 is filled in the hole on the side wall of the manhole.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for attaching a ribbed short pipe to a manhole used when constructing a sewer pipe using a ribbed synthetic resin pipe.

[0002]

[Prior Art]

 When constructing a sewer pipe, it is essential to connect the sewer pipe and the manhole, and usually, a short pipe made by cutting the standard length pipe to a specified adjustment length is attached to the manhole, The end of a series of laid pipes laid by the above connection and the manhole-attached short pipe are connected by a receiving and inserting method.

Conventionally, in order to attach the short tube to a manhole, the short tube tip is sanded, the short tube tip is inserted into a manhole side wall hole, and then the manhole is attached. A method of filling the side wall hole with mortar, a method of fixing a saddle to a short pipe, and fixing the saddle to the side surface of the manhole with an adhesive or a winding wire are used.

[0004]

[Problems to be solved by the device]

 By the way, a synthetic resin pipe with ribs having annular ribs at regular intervals on the outer surface is advantageous as an underground pipe such as a sewer pipe because of its excellent earth pressure resistance.

However, when the short tube of the ribbed tube is attached to the manhole side wall hole by the above-described mortar filling method, the annular rib serves as a barrier against the injection of the mortar, so that the filling of the mortar is difficult. There is an unavoidable problem of water stoppage due to residual voids. On the other hand, even in the saddle system, water leakage easily occurs between the saddle and the short pipe due to the rib on the outer surface of the short pipe with ribs, and it is difficult to achieve satisfactory water stoppage.

An object of the present invention is to provide a mounting structure for a ribbed short pipe to a manhole, which enables the ribbed short pipe to be mounted on a sidewall of a manhole with excellent water resistance and excellent pull-out strength. is there.

[0007]

[Means for Solving the Problems]

 According to the structure for mounting a ribbed short pipe to a manhole of the present invention, the tip of the ribbed short pipe with a saddle is inserted into a hole in the side wall of the manhole, and the saddle is fixed to the outer surface of the side wall of the manhole. A notch is formed in each rib of the ribbed short tube tip portion, and a hole is formed in the side wall of the manhole, and a bonding material is filled therein.

[0008]

[Action]

 Since each annular rib at the tip of the short pipe with ribs inside the hole of the manhole side wall is notched, filling of the bonding material between the inner surface of the hole and the outer surface of the short pipe tip does not leave a gap. It can be carried out completely and can guarantee excellent waterproofness.

Further, since the short tube with ribs is supported by fixing the saddle portion to the side surface of the manhole, the cut ribs are held vertically in the manhole side wall hole without being bent and the above-mentioned joining material is held. Due to the anchoring effect of the cut ribs on the solidified filling joint material, the ribbed short tube can be attached to the manhole sidewall with sufficient pull-out resistance.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 (a) is a plan view showing a ribbed short tube with a saddle used in the present invention, FIG. 1 (b) is a cross-sectional view taken along the line of FIG. 1 (a), and FIG. 1 (c). FIG. 2 is a cross-sectional view of the ribbed short pipe with the saddle taken along the line of FIG. 1B.

In (a) to (c) of FIG. 1, 1 is a short tube with ribs, which is a fixed-length (approximately 4 m) ribbed synthetic resin tube having annular ribs 11 ,. The one shown in the figure has an insertion port 12 for connection with an insertion / insertion type (as shown in FIG. I may have). Reference numerals 110, ... Denote ribs of the ribbed short tube tip portion 13, and cuts 111 are made at a plurality of locations (four locations) at equal intervals in the circumferential direction. It is preferable that the height of these ribs 110 be lower than the original height of the annular rib 11 of the short tube 1 with ribs (usually half the height) in the mortar filling work described later. This can be performed simultaneously with the processing of the cut 111.

Reference numeral 2 denotes a saddle, which has a hole 21 having an inner diameter slightly larger than the outer diameter between the ribs of the ribbed short tube 1 as shown in FIG. 1D. A groove 221 that allows the rib remaining portion 112 of the 110 to pass through is provided, and a right-angled bent portion 20 is provided on the inner peripheral edge of the ear portion 222 between the grooves 221 and 221 as shown in FIG. The length of the right-angled bent portion 20 is substantially equal to or slightly narrower than the distance between the ribs.

The rib remaining portion 112 of the ribbed short tube tip portion 13 is passed through the groove 221, in the hole 21 of the saddle 2, and the ribbed short tube tip portion 13 is inserted into the saddle 2 to form a front surface of the ear portion 222. The annular rib 11a is brought into contact with the front surface of the ear portion 222, and the inner surface of the right-angled bent portion 20 at the inner peripheral edge of the ear portion 222 and the outer surface of the short pipe between the ribs are bonded to each other by the adhesive 3. It is glued.

As will be described later, the fixing strength of the short tube 1 to the manhole wall can be sufficiently ensured by the anchor effect of the rib residual portion 112 in the rib 110 processed by the notch 111 to the filling mortar, and the saddle 2 can be secured. Is not required to have mechanical strength as much as a conventional saddle, and it is sufficient as long as it has an area where mortar can be stopped when filling mortar (which is performed from the inside of the manhole).

FIG. 4 is a side view showing a part of the embodiment of the present invention in section. In FIG. 4, reference numeral 5 denotes a manhole, which has a hole 51 in the side wall. Reference symbol A denotes the ribbed short tube with a saddle described above. The tip portion 13 of the ribbed short tube 1 is inserted into the manhole side wall hole 51, and the saddle 2 is wound around the manhole barrel 52 by winding the wire-6. It is fixed, and the bonding material 7 such as mortar or epoxy resin is filled by pouring into the hole 51 from the inside of the manhole. Since the rib 110 of the ribbed short pipe tip portion 13 existing in the manhole side wall hole 51 is provided with the notch 111, the joining material 7 can be smoothly injected, resulting in excellent waterproofness. Can be guaranteed.

Further, the short tube 1 with ribs is supported by fixing the saddle 2 to the manhole body 52, and despite the cuts 111 at the ribs 110 in the manhole side wall holes 51, the ribs 110 of the ribs 110 are not supported. Since the settling rib 110 can be embedded in the joining material 7 such as mortar in an upright state because the settling rib 110 can be well prevented, the anchor effect of the upstanding rib 110 allows the ribbed short pipe 1 to be attached to the side wall of the manhole. It can be attached to the hole 51 with sufficient pull-out resistance, and even if the winding wire 6 used to fix the saddle 2 to the manhole body 52 is loosened or broken, its pull-out resistance is sufficient. Therefore, the excellent water-stopping property described above can be well maintained.

According to the present invention, the ribbed short pipe 1 attached to the manhole 5 is connected to an existing pipe laid up to the vicinity of the manhole by a receiving / inserting method. If the pipe end on the side of the short pipe with ribs 1 in this connection is an insertion port, the saddle should be attached to the short pipe with ribs in the factory, and the ribbed pipe with saddle should be inserted in the field. The mouth end may be cut to form a ribbed short tube with a saddle of a predetermined length.

As the saddle, a saddle manufactured by heat-processing a resin plate, a saddle manufactured by injection molding, or the like can be used. In the present invention, the manhole 5 also includes a shaft such as a carburet, and the shape of the saddle is a curved plate or a flat plate depending on the shape of the mating surface with which the saddle is abutted.

[0019]

[Effect of the device]

 The mounting structure of the ribbed short pipe of the present invention to the manhole is as described above, and the rib is formed by completely filling the bonding material into the manhole side wall hole into which the tip of the ribbed short pipe is inserted. The attached short pipe can be attached to the manhole side wall hole with excellent waterproofing property, and due to the excellent anchoring effect of the rib in the manhole side wall hole to the solidified joint material, excellent pulling resistance to the mounting part is provided. Can be given.

[Brief description of drawings]

FIG. 1 (a) is a plan view showing an example of a ribbed short tube with a saddle used in the present invention, and FIG. 1 (b).
1 is a cross-sectional view taken along the line of (a) of FIG. 1, and (c) of FIG. 1 is a cross-sectional view of the ribbed short tube with the saddle taken along the line of (a) of FIG.

FIG. 2 is a vertical sectional view showing an example of a saddle used in the present invention.

FIG. 3 is a side view showing another example of a ribbed short tube with a saddle used in the present invention.

FIG. 4 is a side view showing a part of the embodiment of the present invention in section.

[Explanation of symbols]

 A Ribbed short pipe with saddle 1 Ribbed short pipe 13 Ribbed short pipe Tip 110 Rib of short pipe with rib 111 111 Notch 2 Saddle 5 Manhole 51 Hole 7 Joining material

Claims (1)

[Scope of utility model registration request] 1. A front end of a ribbed short pipe having a saddle attached thereto is inserted into a hole in a side wall of a manhole, and the saddle is fixed to an outer surface of the side wall of the manhole. A structure for attaching a ribbed short pipe to a manhole, wherein a notch is provided and a hole in the side wall of the manhole is filled with a bonding material.