JPH0717896U - Rod coupling for sewer cleaning equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a rod coupling for a sewer cleaning instrument that facilitates insertion of a rod from a manhole or the like into a sewer pipe. [Structure] In a rod-type sewer cleaning tool in which a plurality of rods are connected with a coupling and a cleaning head is attached to the end of the rod at the foremost end, a handle operation hole 2 is provided in the center, and hook-and-hook engagement portions 4 are provided at both ends. And a rod tightening nut 8 which is screwed into each of the rod inserting holes 3 at the ends thereof, and the end of each rod tightening nut 8 is formed. Since the shape is the acute-angled taper portion 7, the passage of the pipe opening becomes smooth when inserting into and extracting from the sewer pipe from the manhole or the like.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention also relates to a rod coupling for a sewer pipe cleaning instrument that connects a rod (steel rod) for removing deposits and obstacles in the pipe such as a sewer pipe.

[0002]

[Prior art]

 Generally, as a simple cleaning tool for drainage pipes such as outdoor drainage pipes, a plurality of rods of a predetermined length are sequentially added with a rod coupling, and an appropriately shaped head such as a screw head is attached to the tip of the rod. With this configuration, the rod is inserted into the pipe while rotating it by manual operation, and the deposits and obstacles stuck in the pipe are hooked by the head, or holes are made to establish communication. In this case, in the conventional rod coupling a, as shown in FIG. 5, the rod b is inserted from both ends of the coupling body a ', and the rod b is simply screwed to the end portion in advance. The structure is tightened with.

[0003]

[Problems to be solved by the device]

 However, as described above, the tightening nut c mounted at the end position of the coupling body a'has an ordinary nut shape, and the screw (nut) head d is in an angular state. Therefore, when the rod b is inserted or pulled out from the vertical groove (hole) e such as a sewer or a manhole into the sewer line f of the lateral pipe, the rod b is bent and guided (see FIG. 6). ), The angled screw head d inevitably comes into contact with the pipe opening (entrance exit corner) g of the sewer pipe f, which obstructs the taking in and out of the sewer, and if forcedly done, the pipe g may be scraped off and damaged. There are many. In particular, in the manhole mode where the vertical groove is deep, damage to the tube mouth is large.

In view of the above situation, the present invention has an object to provide a rod coupling for a sewer cleaning instrument that solves the above problems by forming the head of the rod tightening nut into an acute-angled taper shape. Is.

[0005]

[Means for Solving the Problems]

 The present invention is a rod-type sewer cleaning device in which a plurality of rods are connected with a coupling and a cleaning head is attached to the end of the rod at the front, and a handle operation hole is provided at the center and hook-and-hook engaging portions are provided at both ends. It consists of a coupling body with rod insertion holes and rod tightening nuts with opposite screw threads at the ends of both rod insertion holes.The end shape of each rod tightening nut is an acute taper. It is a part.

[0006]

[Action]

 As described above, the shape of the rod tightening nuts located on both ends of the rod coupling that serves as the rod connecting fitting is a taper shape with an acute angle toward the end, so that it changes from a vertical manhole to a horizontal hole. When inserting (or pulling out) into the sewer pipe, both ends of the rod coupling (tightening nuts) are tapered even when the rod is bent and faces the pipe opening that is the protruding corner while bending the rod. The rod coupling passes without getting caught in the pipe mouth.

[0007]

【Example】

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

Reference numeral 1 denotes an operation handle hole 2 orthogonally penetrating in the center, laterally inserting rod insertion holes 3 from both ends toward the vicinity of the center, and bending the tip of each rod insertion hole 3 toward the outer periphery. A metal coupling body having a locking portion 4 formed therein. At both ends of the coupling body 1, an acute-angled taper portion 7 is formed at the end (nut head) through which the rod 6 is inserted into the rod hole 5 in advance. The above rod insertion tightening nuts 8 are screwed into each other to form a rod coupling 9 for a sewer cleaning tool with the overall configuration. In this case, when the rod 6 is attached, the engaging portion 10 bent at the tip is made to face the hook engaging portion 4, and the screwing portions 11a, 11b of the tightening nuts 8, 8 screwed to the left and right are It has a reverse screw structure so that the left and right sides do not loosen even when the rod is twisted (turned).

To explain this action, first, when assembling the rod-type sewer pipe cleaning tool 13 for cleaning the clogging (not shown) in the sewer pipe 12, the rod 6 made of a steel rod having an appropriate length is assembled. As is well known, a plurality of bent end locking parts 10 are hooked so as to face the hook locking part 4 at the tip (back end) of the rod insertion hole 3 and are inserted into the rod 6 side in advance in this state. The tightening nut 8 passing through is screwed into the rod insertion hole 3 of the coupling body 1, and the end of the rod 6 is tightened and fixed by the screw insertion degree of the rod insertion hole 3.

Here, the sewer pipe cleaning tool 13 to which the rod 6 is connected to a predetermined length and the predetermined head 14 is attached to the tip is inserted into the sewer pipe 12 from the head 14 attached to the tip, and The operation handle 15 with the rod 6 attached to the base end is rotated while being appropriately rotated to remove deposits and the like (not shown) clogging the sewer pipe 12 by the head 14.

In this case, when inserting the manhole 16 which is a vertical groove into the sewer pipe 12 which is a horizontal hole, the rod 6 made of a steel rod is not bent at a right angle but is bent while being bent. Therefore, rod 6 and rod coupling 9 having a large diameter for connecting rod 6 come into contact with pipe opening 12a of sewage pipe 12, but both ends of rod coupling 9 have tightening nut 8a. Since the end has a taper portion 7 with an acute angle (for example, an inclination of 15 °), even if it reaches the pipe opening 12a, the inclination of the taper portion 7 causes less catching and allows smooth passage. This is particularly during the pulling-out operation of the rod 6, so that the tube mouth 12a is not caught and scarcely scratched.

The operation handle hole 2 provided in the center of each rod coupling 9 is inserted through a separate handle 15 ′ as necessary when inserting or pulling out a predetermined length, and is operated at a hand position. It facilitates and effectively transmits the force of rotation or insertion and withdrawal. Further, of the pair of tightening nuts 8 screwed to both ends of the coupling body 1, one screw thread (screw portion 11b) is finely engraved as shown in the drawing, and is substantially fixed side. I will keep it.

[0013]

[Effect of device]

 As described above, the rod coupling for a sewer pipe cleaning instrument of the present invention has a sharp nut taper at the ends of the tightening nuts located at both ends of the coupling body, so that it can be removed from a sewer pipe, manhole, etc. When inserting (or pulling out) an appropriate number of rods into the sewer pipe, a rod coupling having a diameter larger than that of the rod is not caught by the pipe mouth and the pipe mouth is not damaged. In particular, this is a deep manhole, and even if a large pulling force is applied when pulling back by hooking deposits, obstacles, etc., it is tapered and slippery at the mouth position, so By now, the scraping damage caused by the collision of the nut head with the corners of the rod coupling that often occurs is eliminated. Moreover, since the present invention has a simple structure, it has a practical effect that it can be manufactured easily and can be improved even by installing the special tightening nut portion even in the conventional type.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a rod coupling showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view of the same tightening nut.

FIG. 3 is an explanatory view of using a rod-type sewer cleaning tool.

FIG. 4 is an explanatory diagram in which a rod-type sewer cleaning tool is inserted from a manhole into a sewer pipe.

FIG. 5 is a sectional view of an essential part of a conventional rod coupling.

FIG. 6 is an explanatory diagram in which a tightening nut of a rod coupling is supported at a sewer pipe port by using a conventional rod-type sewer cleaning tool.

[Explanation of symbols]

 1 Coupling Main Body 2 Operation Handle Hole 3 Rod Insertion Hole 4 Hook Locking Part 6 Rod 7 Tapered Part 8 Rod Insertion Tightening Nut

Claims (1)

[Scope of utility model registration request] 1. A rod-type sewer cleaning tool in which a plurality of rods are connected with a coupling and a cleaning head is attached to the end of the rod is provided with a handle operation hole at the center and hooked locking portions at both ends. A coupling body having rod insertion holes and a rod tightening nut that is screwed in reverse at the ends of both rod insertion holes.
A rod coupling for a sewer cleaning instrument, in which the terminal shape of each rod tightening nut is an acute-angled taper portion.