JPH0953386A - Collar for propelling pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To firmly and easily reinforce a propelling pipe so that its top edge is prevented from being peeled outward by the contact with a foreign matter in propelling by protruding a rib member on the top edge inner circumferential surface of a cylindrical steel pipe collar to be installed to the connecting part of the propelling pipe. SOLUTION: A ring-shaped rib member 2 having a vertical width and lateral width of about 10×10mm is welded to the inner circumferential surface inlet on the top edge of a cylindrical steel collar 1 to be installed to the connecting part of a propelling pipe 3 such as fume pipe along the top edge. On the deep side of the top edge, two rib members 2, 2 may be juxtaposed while keeping a prescribed space. Thus, even the steel collar 1 using a steel plate so thick that the tip is hardly curved by press to form a curled edge can be more firmly and easily reinforced. When the root end part of the steel collar 1 the top edge of which is reinforced is fitted to the peripheral part of the propelling pipe 3 and propelled, the top edge of the steel collar 1 can be prevented from being peeled in the circumferential direction even when it strongly makes contact with a foreign matter such as gravel.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical steel collar used in a connecting portion of a propulsion pipe such as a fume pipe, and in particular, by reinforcing the tip edge, the collar is protected from foreign matter such as gravel during propulsion. The present invention relates to a propulsion pipe collar that does not turn over even if it comes into contact.

[0002]

2. Description of the Related Art In a conventional propulsion pipe collar of this type, for example, as shown in FIG. 4 (A), the tip edge of a steel collar 11 fitted in the socket portion of the propulsion pipe 10 is curved inward. A curl edge 12 is formed, and the curl edge 12 reinforces the tip edge of the steel collar 11 so that the tip edge of the steel collar 11 does not turn over even when contacted with gravel during propulsion. . Further, by forming the curl edge 12 in this way, even when the tip of the collar 11 is strongly abutted against the water blocking rubber attached to the propulsion pipe 10 on the opposite side when the propulsion pipe 10 is joined, It was designed so as not to damage or flip the water rubber.

In the case of a steel collar 11 formed of a relatively thin steel plate having a wall thickness of about 6 mm or less, the curl edge 12 is formed by bending the leading edge toward the inner peripheral side as described above. However, it was possible to reinforce the leading edge with the curl edge. However, for example, as shown in FIG. 4 (B), the steel collar 13 formed of a steel plate having a wall thickness of about 9 mm or more is extremely difficult to bend the steel plate by pressing or the like. It was used as it was without bending the tip edge.

[0004]

However, as shown in FIG. 4B, when the tip edge of the steel collar 13 is not bent, the steel collar 13 is made of steel when propelled. When a foreign matter 14 such as gravel comes into contact with the tip edge of the collar 13, there is a problem that the tip edge of the steel collar 13 is turned outward due to the action of the foreign matter 14.

The propulsion pipe collar according to the present invention is a completely new technology developed in view of the above-mentioned conventional problems,
In particular, a rib material is provided on the inner peripheral surface of the tip edge of the steel collar to reinforce the tip edge with the rib material, so that even if the tip edge of the steel collar contacts foreign matter such as gravel during propulsion. , Provides a completely new propulsion tube collar technology that prevents the tip edge from turning.

[0006]

The propulsion pipe collar according to the present invention is a technique which has fundamentally improved the above-mentioned conventional problems, and the gist of the invention is the connecting portion of the propulsion pipe such as a Hume pipe. A cylindrical steel collar mounted and used in a propulsion pipe collar, characterized in that a rib material is provided so as to project from the inner peripheral surface of the tip edge of the steel collar.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the propulsion pipe collar according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional explanatory view of the propulsion pipe collar according to the present invention, and FIG. 2 is for the propulsion pipe of FIG. FIG. 3 is a partially cutaway sectional perspective view of a collar, and FIG. 3 is a sectional explanatory view of a propulsion pipe collar of another embodiment according to the present invention.

1 and 2, reference numeral 1 denotes a cylindrical steel collar according to the present invention, which is formed of a steel plate having a wall thickness of about 9 mm. A ring-shaped rib material 2 is welded to the inlet of the inner peripheral surface of the front end edge of the steel collar 1 in a direction orthogonal to the axis of the steel collar 1. This rib material 2
The upper and lower widths and the left and right widths are approximately 10 x 10 mm. Further, the base end portion of the steel collar 1 is fitted to the outer peripheral portion of the propulsion pipe 3 made of fume pipe.

Since the propulsion pipe collar according to the present invention is integrally attached by welding the ring-shaped rib material to the inner peripheral surface of the tip end edge of the steel collar 1 as described above. The tip edge can be strongly reinforced with this rib material 2.

Therefore, when the tip end of the steel collar 1 comes into strong contact with foreign matter such as gravel when the tip end edge of the steel collar 1 is attached to the propelling tube 3 and propelled together with the propelling tube 3, the tip edge may be flipped up in the outer peripheral direction. Absent.

In the above embodiment, the steel collar 1 made of a steel plate having a wall thickness of about 9 mm, which is difficult to bend by pressing, was explained, but about 6 mm or less, which is easy to bend by pressing. Even in the case of the steel collar, the rib material 2 may be welded to the tip edge as in the present invention without providing a curl edge on the tip edge as in the above-mentioned conventional example.

As in the present invention, when the rib material 2 is attached to the tip edge of the steel collar 1, the working operation is easier than the case where the tip edge is curved to form a curl edge as in the conventional case. In addition, the tip edge can be reinforced more firmly.

In the above embodiment, one rib member 2 is attached to the tip edge of the steel collar 1. However, as shown in FIG. Furthermore, it is also possible to weld two rib members 2a and 2b in parallel with the rib member 2 while keeping a predetermined gap therebetween.

In this way, the plurality of rib members 2, 2a, 2b
When these are attached in parallel to the front edge of the steel collar 1, the entire front edge can be reinforced in a stable state. Further, by utilizing these rib members 2, 2a, 2b, both side surfaces of the rubber rings 4a, 4b for stopping water are sandwiched by these rib members 2, 2a, 2b for stopping water. The rubber rings 4a and 4b can be attached and fixed in the front end edge of the steel collar 1 in a simple and stable manner.

[0015]

Since the propulsion pipe collar according to the present invention has the above-described structure and operation, it has the following great effects.

(1) Since the rib material is provided on the inner peripheral surface of the tip edge of the steel collar, the tip edge can be reinforced by the rib material. (2) Therefore, even when the tip edge comes into contact with a foreign substance such as gravel during propulsion, it is possible to prevent the tip edge from turning outward.

(3) It is possible to make the working operation easier and to reinforce the tip edge more firmly than in the conventional case where the tip edge is curved. (4) When a plurality of rib members are juxtaposed on the inner peripheral surface of the leading edge with a predetermined interval, the entire leading edge can be reinforced. (5) Furthermore, a rubber ring for stopping water can be easily attached between these rib members in a stable state.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a propulsion pipe collar according to the present invention.

2 is a partial cutaway perspective view of the propulsion pipe collar of FIG. 1. FIG.

FIG. 3 is a cross-sectional explanatory view of a propulsion pipe collar according to another embodiment of the present invention.

4 (A) and 4 (B) are cross-sectional explanatory views showing a conventional propulsion pipe collar, respectively.

[Explanation of symbols]

1 steel collar 2,2a, 2b rib material 3 propulsion pipe 4a, 4b rubber ring 10 propulsion pipe 11 steel collar 12 curl edge 13 steel collar 14 foreign material

Claims (2)

[Claims] 1. A cylindrical steel collar used by being attached to a connecting portion of a propulsion pipe such as a fume pipe, in which a rib material is provided so as to project from the inner peripheral surface of the front end edge of the steel collar. A color for propulsion pipes that has been characterized. 2. A collar for a propulsion pipe according to claim 1, wherein a plurality of rib members are provided in parallel on the inner peripheral surface of the tip edge so as to be spaced apart from each other at a predetermined interval.