JP7285493B1 - drilling rod - Google Patents

Abstract

[Problem] When a plurality of hydraulic cylinders for expansion are provided on the head of a rod for excavation work such as an earth auger, and when electric equipment for geological survey is provided, the hydraulic cylinder remains in the rod when the rod is cut off. To provide a rod for excavation work capable of preventing cement milk or the like from affecting a hydraulic coupler and electric wiring. A liquid such as cement milk or water is supplied by swivel tubes 9 and 10 connected by a free joint 11 to a rod inner tube 7 of an excavating rod 1 having a male joint 2 and a female joint 3 formed at the ends thereof. A coupler holder 14 is provided as an outward flange at the ends of the swivel pipes 9 and 10, a female coupler 23 and a male coupler 22 are set on the coupler holder 14, and the hydraulic hose 21 is connected to the liquid supply. These coupler holders 14 are fixed inside the rod 1 for excavation work along the working pipe 8 . [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to rods for excavation work, such as stirring rods and screw rods.

As shown in FIGS. 19 and 20, as shown in FIGS. 19 and 20, a male joint 102 having a regular hexagonal prism shape at one end and a socket having a regular hexagonal hole at the other end is a female screw rod. A joint 103 is formed, and a rod inner pipe 107 is used as a liquid supply pipe for supplying liquids such as cement milk and water.

A hydraulic pipe (hydraulic hose) 111 is arranged along the rod inner pipe 107, and a female coupler 118 is connected to the extension thereof, and a male coupler 117 is connected to the female joint 103 provided at the other end of the hydraulic pipe. When the male joint 102 and the female joint 103 are engaged, the female coupler 118 and the male coupler 117 are engaged.

In the joint device of the male joint 102 and the female joint 103, the male coupler 117 and the female coupler 118 are eccentrically positioned. There is a drawback that the coupler 117 and the female coupler 118 are displaced in the rotational direction and cannot be engaged.

Incidentally, the excavation work rod 1 may be a rod without a screw as shown in FIG.

The inventors have previously proposed that the gap between the male and female joints should be adjusted to absorb the clearance, and the hydraulic supply path of the screw auger rod should be reliably and easily provided against the looseness in the rotational direction of the joint engaging portion. As a rod for excavation work that can
Japanese Patent No. 5247835

As shown in FIG. 18, the screw rod of the screw auger as the excavation work rod 1 has screw blades 101 that revolve around the outer circumference, and has a plurality of screw blades 101 that should be connected to each other. A joint 102 is connected, and a female joint 103 having a regular hexagonal socket is formed at the other end.

Pin holes 104 and 105 are formed in the male joint 102 and the female joint 103, and connection pins (not shown) are driven into these pin holes 104 and 105 to fix the joint connection.

As shown in FIG. 17, in Patent Document 1, the hydraulic pipe 111 is composed of a hydraulic hose, and the male coupler 117 and the female coupler 118 connecting the hydraulic pipe 111 are connected to the male joint 102 and the female joint 103 of the excavation work rod 1 . placed inside the

In the figure, reference numeral 107 denotes a rod inner tube which is installed in the hollow of the excavation work rod 1. Inside the rod inner tube 107, a hydraulic supply path 108 having a diameter smaller than that of the rod inner tube 107 extends concentrically. A liquid supply path 109 for cement milk, water, or the like is formed between the rod inner tube 107 and the hydraulic supply path 108 by means of this.

A coupler holder 132 in the figure covers the outer periphery of the male coupler 117 and is fixed to the male coupler 117 with a set screw 141 . The coupler holder 132 has a connecting flange 132a at its front end for bolting the coupler holder 132 to the male joint 102. As shown in FIG.

The rod inner tube 107 is supported by a flange plate 110 provided inside the rod pipe 106 .

As described above, the hydraulic supply path 108 is formed by arranging the hydraulic pipe 111. The outer periphery of the hydraulic pipe 111 is covered with the cover pipe 112, and the male coupler 117 and the female coupler 118 are attached to both ends of the cover pipe 112, respectively. .

Although not shown, the male coupler 117 is formed with a guiding convex guide, and the female coupler 118 is formed with a guiding convex guide groove.

The stopper 134 of the female coupler 118 prevents the female coupler 118 from coming off, and the female coupler 118 is rotatably provided with a bearing 135 . and the bearing 135 are fixed with a stopper set bolt 136 , and a positioning pin 139 having a positioning hole of the cover pipe 112 as a loose hole is screwed onto the outer circumference of the female coupler 118 .

According to Patent Document 1, the male coupler is formed with a guiding convex guide, and the female coupler is formed with a guiding groove that engages with this guiding convex guide. By aligning them, the male coupler and the female coupler can be reliably fitted.

In addition, since the female coupler 118 is rotatable with respect to the cover pipe 112 and the bearing 135, the female coupler 118 can be rotated with respect to the larger gap than the original 1 mm gap between the male and female joints in the rotational direction. By adjusting , the escape allowance can be absorbed and adjusted.

Even if such rotation of the female coupler 118 occurs during excavation, the positioning pin 139 regulates it, and the gap between the positioning pin 139 and the positioning hole (loose hole) absorbs the backlash due to wear of the joint. will be.

In recent years, drilling technology in construction (building construction, etc.) and civil engineering (bridge construction, etc.) has expanded by installing multiple hydraulic cylinders, etc. at the drilling tip (head, etc.) of the earth auger, and furthermore, electric equipment for geological surveys. A provided configuration is required.

In Patent Document 1, since the hydraulic supply path 108 and the hydraulic piping 111 are set in the rod inner tube 107 through which the injection material such as cement milk flows, when the rod and the rod (or the screw and the screw) are separated, the rod inner tube Cement milk remaining in 107 adheres to male coupler 117 and female coupler 118, clogging the inside of the coupler and causing malfunction.

It is an object of the present invention to eliminate the above-mentioned problems of the prior art, and to provide a plurality of hydraulic cylinders for expansion on the head of a rod for excavation work such as an earth auger, and to provide electrical equipment for geological surveys. In addition, since the hydraulic coupler of the hydraulic hose is set outside the liquid supply operation pipe where the injectate, water, cement milk, etc. flow during and after excavation, the cement milk, etc. remaining in the rod when the rod is disconnected And to provide a rod for excavation work that does not affect electrical wiring.

In order to achieve the above object, the present invention as set forth in claim 1 provides cement milk, water, etc., by connecting swivel pipes connected by a free joint to the inner pipe of a rod for excavation work having male and female joints formed at the ends thereof. A coupler holder is provided as an outward flange at the end of the swivel pipe, a plurality of female couplers and male couplers are set on the coupler holder, and the hydraulic hose is arranged along the liquid supply operation pipe, The gist of the invention is that the coupler holder is fixed in a rod for excavation work.

According to the first aspect of the present invention, since the coupler holder is provided as an outward flange, it is possible to provide a plurality of couplers and electrical terminals here.

In addition, since the injectate, water, cement milk, etc. during drilling and drilling flow through the liquid supply operation pipe of the rod inner tube, the coupler holder prevents the oil container coupler and electrical wiring outside the liquid supply operation pipe. have no effect.

Swivel pipes connected by free joints are installed in the rod inner pipe of the excavation work rod as liquid supply operation pipes such as cement milk and water, and the direction of expansion and contraction is fixed by the free joint. , The direction of rotation is free, so you can manufacture the rod without worrying about the direction of the male and female joints.

Especially when attaching and welding screw blades to the rod, when the blade pitch is not divisible against the total length (for example, blades with a total length of 5000 and 700 pitches), the direction of the male and female joints does not match, but the recoupler can be recoupled by the free joint. Alignment becomes possible.

The gist of the present invention as set forth in claim 2 is that the coupler holder is provided with a key groove or key with which a key or key groove formed in the excavating work rod is engaged.

According to the second aspect of the present invention, the coupler holder is locked in the auger rod by the engagement of the key and the key groove. Therefore, even if the hexagonal part of the joint wears and looseness occurs, the male and female coupler of the connected liquid supply working pipe is not affected by the rotational force during excavation.

The third aspect of the present invention is characterized in that the coupler holder is also a terminal holder for electrical wiring.

According to the third aspect of the present invention, the electrical wiring can also be routed outside the liquid supply working pipe by means of a coupler holder. A combination of working pipes is also possible, and the injectate, water/cement milk, etc. during and after drilling flows through the liquid supply working pipe and does not affect the electrical wiring outside.

According to the fourth aspect of the present invention, a guide shaft is protruded from the coupler holder at the end of one of the swivel tubes constituting the liquid supply working tube, and the guide shaft is provided at the coupler holder at the end of the other swivel tube. The gist is that a bearing hole is formed.

According to the fourth aspect of the present invention, when the excavating rod is connected, the φ portion of the male/female joint first comes into contact with the hexagonal portion of the male/female joint in a state where the hexagonal portions of the female joint and the male joint are combined, and then the guide shaft. A guide shaft and a guide bearing hole are formed, and the male/female coupler is set, so the coupler can be joined smoothly.

As described above, the rod for excavation work of the present invention is provided with a plurality of hydraulic cylinders for expansion in the head of a rod for excavation work such as an earth auger, and an electric power supply for geological investigation. When installing equipment, etc., the hydraulic coupler of the hydraulic hose is set outside the liquid supply operation pipe through which the injectate, water, cement milk, etc. flow during and after excavation, so there is no cement remaining in the rod when the rod is disconnected. It is possible to prevent milk or the like from affecting the hydraulic coupler and electrical wiring.

1 is a longitudinal front view showing an embodiment of an excavating rod of the present invention; FIG. 1 is a plan view showing one embodiment of an excavating rod of the present invention. FIG. 1 is a bottom view showing one embodiment of a rod for excavation work of the present invention. FIG. 1 is a vertical cross-sectional front view of a rod pipe showing one embodiment of an excavating rod of the present invention. FIG. 1 is a plan view of a rod pipe showing one embodiment of an excavating rod of the present invention; FIG. 1 is a bottom view of a rod pipe showing one embodiment of a rod for excavation work of the present invention. FIG. 1 is an explanatory diagram of a liquid supply working pipe showing one embodiment of a rod for excavation work of the present invention. FIG. 1 is a plan view of a liquid supply working pipe showing one embodiment of a rod for excavation work of the present invention. FIG. FIG. 4 is a bottom view of a liquid supply working pipe showing one embodiment of the excavating work rod of the present invention. It is a longitudinal side view of a liquid supply actuation pipe. FIG. 4 is a front view of a hydraulic coupler set in a coupler holder of a liquid supply working pipe; FIG. 4 is a rear view of a hydraulic coupler set in the coupler holder of the liquid supply working pipe; FIG. 10 is a vertical cross-sectional view of the liquid supply working pipe from another angle; FIG. 4 is a front view of the electric terminal set in the coupler holder of the liquid supply working pipe; FIG. 4 is a rear view of the electric terminal set in the coupler holder of the liquid supply working pipe. It is a longitudinal side view of hydraulic piping which is a principal part showing a conventional example. It is a longitudinal side view showing a conventional example. It is an external appearance side view which shows a conventional example. FIG. 11 is a longitudinal front view showing another conventional example; FIG. 11 is a side view showing another conventional example; It is a front view which shows rods for excavation work other than a screw rod.

Embodiments of the invention will be described in detail below with reference to the drawings. FIG. 1 is a longitudinal front view showing one embodiment of the rod for excavation work of the present invention, and FIG. 4 is a longitudinal front view of the same rod pipe. is. The excavating rod 1 is formed as a rod pipe 6 .

As shown in FIG. 18, the excavating rod 1, which is a rod pipe 6, has a regular hexagonal columnar male joint 2 at one end and a regular hexagonal column at the other end so that a plurality of rods should be connected to each other. It forms a female joint 3 with a hole socket. In the figure, α indicates the hexagonal portion and β indicates the central portion.

Further, pin holes 4 and 5 are formed in the male joint 2 and the female joint 3, and connection pins (not shown) are driven into these pin holes 4 and 5 for joint connection.

A rod inner tube 7 is formed in the rod pipe 6 , and a liquid supply operation tube 8 such as cement milk or water is detachably arranged in the rod inner tube 7 .

The liquid supply working pipe 8 is fixed in the expansion/contraction direction, but is free in the rotation direction.

The free joint 11 includes an inner tube 11a having a groove 11c formed on its outer periphery with which the projecting tip of the setting bolt 11d engages, and the free joint 11 is fitted into the inner tube 11a and screwed into the insertion hole so that the tip protrudes inward. By fitting the outer tube 11b to the inner tube 11a and engaging the tip of the setting bolt 11d with the groove 11c, the direction of expansion and contraction is fixed. The direction of rotation is free.

An O-ring 12 is interposed between the inner tube 11a and the outer tube 11b to make it watertight.

When connecting the swivel tubes 9 and 10 with this free joint 11, either the inner tube 11a or the outer tube 11b may be provided on one of the swivel tubes 9 and 10. FIG.

At the ends of the swivel pipes 9 and 10, a coupler holder 14 having engaging through-holes 13 circumferentially arranged on a disc is provided as an outward flange.

A coupler holder 14 provided on the swivel tube 9 is provided with a key 15 which engages a key groove 17 formed in the male joint 2 of the rod 1 . The width of the keyway 17 is assumed to be larger than that of the key 15 by several millimeters.

A coupler holder 14 provided on the swivel tube 10 is provided with a guide shaft 18 and a key groove 16 with which a key 19 formed in the female joint 3 of the rod 1 is engaged.

The coupler holder 14 provided on the swivel tube 9 is formed with a guide bearing hole 20 in which a guide shaft 18 is engaged.

The coupler holder 14 is capable of setting electrical terminals 24 of electrical wiring using the engaging through holes 13 (see FIG. 13).

The swivel pipes 9 and 10 forming the liquid supply working pipe 8 are ends of a coupling structure in which the swivel pipe 9 is connected to the swivel pipe 10 when the rod pipe 6 is spliced.

A female coupler 23 and a male coupler 22 at the end of the hydraulic hose 21 are set in the coupler holder 14 using the engagement hole 13, and the hydraulic hose 21 is aligned along the liquid supply operation pipe 8 as shown in FIG. Although not shown, by setting the electrical terminal 24 in the coupler holder 14, the electrical wiring is also routed along the liquid supply working pipe 8. As shown in FIG. The electrical terminals 24 may also have a coupling connection structure.

The liquid supply working tube 8 is detachably set in the rod inner tube 7 by key joint via a coupler holder 14 .

A set groove 25 is formed in the opening of the male joint 2, and after the liquid supply working pipe 8 with the coupler holder 14 is accommodated, a stop ring 26 is fitted to prevent the coupler holder 14 from coming off.

In this way, the hydraulic hose 21 and the liquid supply working pipe 8 along which the electric wiring is arranged are arranged in the rod inner pipe 7 by the coupler holder 14, and the connection of the rod 1 is first performed by the male joint 2 and the female joint 3. Then, the guide shaft 18 hits and is inserted into the guide bearing hole 20, and the male coupler 22 and the female coupler 23 are engaged.

Although the excavation work rod is a screw rod such as an auger, the set of the liquid supply working pipe 8 is possible for an excavation work rod other than the screw rod as shown in FIG.

In addition to the case where various rods are configured by adding only screw rods, for example, when the excavation work rod 1 provided with the lower stirring blade 30 or the screw rod is provided in the excavation work rod 1 on the upper side of FIG. and so on.

DESCRIPTION OF SYMBOLS 1... Screw rod 2... Male joint 3... Female joint 4, 5... Pin hole 6... Rod pipe 7... Rod inner tube
8 Liquid supply operation pipe 9, 10 Swivel pipe 11 Free joint 11a Inner pipe 11b Outer pipe 11c Groove 11d Setting bolt 12 O-ring 13 Engagement through hole 14 Coupler holder 15 Key 16 Key groove 17 Key groove 18 Guide shaft 19 Key 20 Guide bearing hole 21 Hydraulic hose 22 Male coupler 23 Female coupler 24 Electric terminal 25 Set groove 26 Stop ring 30 Stirring blade 101 Screw Blade 102 Male joint 103 Female joint 104, 105 Pin hole 106 Rod pipe 107 Rod inner tube 108 Hydraulic supply path 109 Liquid supply path 110 Flange plate 111 Hydraulic pipe 111a Non-flexible tube 112 Piping cover pipe 113, 114 Piping holder 117 Male coupler 118 Female coupler 119 Hydraulic male coupler 121 Valve 122 Spring 132 Coupler holder 132a Connection flange 134 Stopper 135 Bearing 136 Stopper set Bolt 137 Set Screw 139...Positioning pin 141...Set screw 142...Bolt

Claims (4)

Swivel pipes connected by free joints are arranged as working pipes for supplying liquids such as cement milk and water in the rod inner pipe of an excavation rod having a male joint and a female joint formed at the end, and this swivel pipe end is A coupler holder is provided as an outward flange in the coupler holder, a plurality of female couplers and male couplers are set in the coupler holder, the hydraulic hose is arranged along the liquid supply working pipe, and the coupler holder is fixed in the excavation work rod. A rod for excavation work characterized by: 2. The excavating rod according to claim 1, wherein the coupler holder is provided with a key groove or a key for engagement with a key or key groove formed in the excavating rod. 3. The excavating rod according to claim 1, wherein the coupler holder is also a terminal holder for electrical wiring. A coupler holder at one end of the swivel pipe constituting the liquid supply working pipe has a guide shaft projecting therefrom, and a guide bearing hole for the guide shaft is formed in the coupler holder at the end of the other swivel pipe. The rod for excavation work according to claim 2.

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