JPH0596192U - Perforator coupling - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide a coupling for a punching device configured so that the casing can be attached and removed safely and easily. [Structure] A cylindrical and tapered fitting portion 12 is provided following a threaded portion 11a of a cylindrical coupling 11, and a water passage hole used for drilling is provided on a side surface of the fitting portion 12. 13 was formed. [Effect] When connecting the casing to the coupling by screwing, you can hang one end on the fitting part and then push it to align with the screwing part. Since it hangs, it does not fall suddenly, and it is possible to improve workability and safety of attachment and detachment work.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a casing single pipe perforation device having a Kronen bit, a lost bit, etc. at its tip, and a double pipe perforation device having a ring bit, an inner bit, etc. at its tip, and in particular, the casing is detachably connected. It is related to the coupling.

[0002]

[Prior Art]

 First, a schematic configuration of a conventional double pipe punching device will be described with reference to FIG. The traveling vehicle 1 is composed of a tracked vehicle or the like, and an engine section 2, a hydraulic mechanism 3 schematically shown, and the like are provided on the upper portion thereof. A movable pedestal 4 is provided on the upper portion of the engine unit 2, and a drifter 5, a swivel 6, a coupling 7, a hollow cylindrical casing 8, a ring bit 9 as a drilling blade, etc. are provided on the pedestal 4. .. When drilling on the bank or the ground at a civil engineering site, etc., the hydraulic mechanism 3 is driven by the operating section (not shown) provided in the engine section 2 and the pedestal 4 is tilted at a desired angle. The ring bit 9 is positioned at the drilling position, and drilling work is performed while supplying water from a water supply pipe (not shown).

The casing 8 and the coupling 7 for connecting the casing 8 to the swivel 6 are formed in a hollow cylindrical shape as shown in FIG. 5, and a small-diameter inner bit provided inside the ring bit 9 is driven in the hollow portion. It is designed to be used as a water supply route or for the inner rod to be inserted. In the conventional coupling 7, a thread groove 7a for screwing the casing 8 is formed at one end of the cylindrical body, and a thread groove 7b for screwing the swivel 6 at the other end. It is a thing. Here, an example of dimensions of the coupling 7 will be described. The outer diameter of the position where the thread groove 7a is formed is 116 mm, the outer diameter of one casing is 133 mm, and the weight is 42 kg. Therefore, when the casing 8 is screwed into the coupling 7, it cannot be carried out by one worker, and two workers hold it and fit it at the same timing, and then perform the screwing work.

[0004]

[Problems to be solved by the device]

 Since the screw groove 7a of the coupling 7 is formed up to the tip, when connecting the casing 8, in other words, when connecting, the tip of the casing 8 is attached to the tip of the screw groove 7a, and then the screw grooves are fitted together. You have to rotate it so that it fits in. In this case, unless the center lines of the coupling 7 and the casing 8 are completely aligned, the screws will not fit and the screwing will not be possible. Moreover, since the connection work is performed by two workers while holding the casing 8, the connection work cannot be performed smoothly unless the power and breathing of the two, that is, the timings match, and the connection work is troublesome. It was

Further, when the casing 8 once connected is detached by two workers, in this case, the casing 8 tends to drop as soon as the casing 8 is detached from the screw groove 7a. Since the worker is aware of this drop, when it comes near the end of the screw groove 7a, he / she must rotate slowly while applying force in preparation for the drop, and must hold it so that it does not fall out at the same time as it comes off the screw groove 7a. .. Therefore, removing the casing 8 was also troublesome.

Further, if the worker does not know that the casing 8 falls at the same time as coming off the screw groove 7a, a fall accident is likely to occur, in which case the worker may be injured or the casing 8 may be damaged. there were. Even if the casing 8 falls and even a very small portion of the tip portion is crushed, it will be difficult to fit the screw groove 7a of the coupling 7, and this will hinder the next use. SUMMARY OF THE INVENTION An object of the present invention is to provide a coupling for a punching device configured so that the work of attaching and detaching the casing can be performed safely and easily.

[0007]

[Means for Solving the Problems]

 The above object of the present invention is to provide a coupling for a drilling device, wherein the other end of a hollow cylindrical casing having a drilling tool attached to one end is detachably screwed to a driving body for rotating the drilling tool. This is achieved by the coupling of the punching device, which is characterized in that at least one end of the coupling is formed with a tapered fitting portion following the threaded portion.

[0008]

[Action]

 According to the present invention, when the casing is screwed to the coupling, the casing can be guided to the screwed portion by hanging the casing on the tapered surface of the tapered fitting portion and pushing it in. Connection work becomes easy. Further, when removing the casing from the coupling, one end of the casing is hooked on the tapered surface after the screwing is removed, so that the casing does not fall suddenly and the removal work can be performed safely and easily.

[0009]

Embodiment

 Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Needless to say, the present invention is not limited to this embodiment. FIG. 1 is a side view of a coupling to which the present invention is applied, FIG. 2 is a side view seen from the center of the coupling, and FIG. It is a perspective view. Since the configuration of the entire apparatus and the configuration of each member except the coupling are as described with reference to FIG.

In the coupling 11 of this embodiment, a fitting portion 12 is formed which is tapered from the terminal end P of the screw groove 11a corresponding to the threaded portion in the present invention toward the tip, in other words, a tapered fitting portion 12. Has been done. Further, water holes 13 that serve as water channels for supplying water to the soil during perforation are provided around the outer periphery of the fitting portion 12 at appropriate intervals. Further, a thread groove 11b for screwing with the swivel 6 is formed on the other end side of the coupling 11. It should be noted that the fitting portion 12 may be formed continuously with the thread groove 11b, but in the present embodiment, a configuration formed for connecting the casing 8 will be described.

Next, the operation of connecting the casing 8 will be described. An operator lifts the casing 8 and fits its tip into the fitting portion 11a. At this stage, the screw groove 11a and the screw groove formed inside the casing 8 do not match, but when the tip of the casing 8 reaches the position P by pushing in the fitting portion 12 and pushing in the longitudinal direction, the screw groove is formed. Will come into contact with you. In this state, if the center lines of the coupling 11 and the casing 8 are not displaced and the casing 8 is rotated along the thread groove 11a, both can be screwed together. As can be understood from the screwing operation described above, it is not necessary to align the casing 8 with the thread groove 11a of the coupling 11 prior to the screwing, and the casing 8 is fitted into the fitting portion 12 for rough alignment. From the screw. Therefore, the positioning is simplified, and the screwing work can be performed efficiently.

Next, the removal of the casing 8 will be described. In this case, the casing 8 is held, and the casing 8 is rotated in the direction opposite to that when screwed. Then, when the tip of the casing 8 reaches the position P, it is disengaged from the screw groove 11a. Conventionally, there is a risk that the casing 8 suddenly drops when reaching this position P, but in the configuration of the present embodiment, the tip of the casing 8 once rests on the fitting portion 12, in other words, inside the casing 8. The side surface comes to hang on the fitting portion 12. The operator can visually confirm that the casing 8 is unscrewed as described above. Therefore, from this stage, the casing 8 is pulled out along the tapered surface of the fitting portion 12 and completely separated from the coupling 11.

The movement of the casing 8 during the separating operation is illustrated. As shown by an arrow A in FIG. 1, the casing 8 descends from the position P along the tapered surface of the fitting portion 12 and falls from the end portion of the fitting portion 12. Will come to do so. Therefore, the worker should concentrate on the rotation of the casing 8 without worrying about the fall until reaching the position P, and pull out so as not to drop after reaching the position P. In this way, when removing the casing 8, it is not necessary to consider dropping when the screw is unscrewed from the screw groove 11a, so that it is possible to concentrate on screw unscrewing. Further, the casing 8 may be separated by pulling it out from the coupling 11 while lowering it along the fitting portion 12, and in this case, consideration should be given to preventing the casing 8 from falling. Therefore, the removal work of the casing 8 can be performed safely and efficiently.

Next, each member constituting the double pipe punching device will be described with reference to FIG. The outline of the state in which the members described below are assembled is as described with reference to FIG. The shank rod 21 is connected to a main body hammer mechanism portion (not shown) and transmits the rotational force and the striking force from the hammer mechanism portion to the ring bit 9 attached to the tip of the casing 8. The cleaning adapter 22 transmits the rotational force and the striking force transmitted from the shank rod 21 to the casing 8 and an inner rod 33 which will be described later, and also branches the water channels for water supply and drainage during perforation. Although the cleaning adapter 22 is inserted in the cleaning swivel 6, the edge of the cleaning swivel 6 is closed by the packing retainer 23 to prevent water leakage.

The swivel 6 is configured such that water supplied from a water supply pump (not shown) is poured into the cleaning adapter 22 through the water supply port 6a, and a gap between the swivel 6 and the inner rod 33 that is provided by being inserted into the casing 8 from the tip end of the hole. The slime discharged from the outlet is discharged from the discharge port 6b to the outside. In the assembled state of the apparatus, one end of the coupling 11 seems to be screwed to the swivel 6, but actually, the coupling 11 is screwed to one end of the cleaning adapter 22 in the swivel 6. Therefore, when the cleaning adapter 22 rotates, the coupling 11 also rotates, and the casing 8 screwed into the thread groove 11a of the coupling 11 also rotates. A ring bit 9, which is a piercing blade, is fixed to the tip of the casing 8 by screwing, and rotates together with the casing 8 for piercing.

On the other hand, the extension rod 31 to the inner bit 34 are inserted into the hollow portion of the casing 8 or the like, which is why this structure is called a double pipe. Each member from the extension rod 31 to the inner bit 34 is also formed in a hollow shape so that water can be supplied at the time of drilling. The extension rod 31 is connected to one end of the cleaning adapter 22 by screwing, and is used for aligning the inner bit 34 attached to the tip of the inner rod 33 and the ring bit 9. If the casing 8 and the like are used as the outer and the inner rod 33 is used as the inner, it can be said in other words for the purpose of aligning the outer with the inner.

The inner coupling 32 rotatably connects the extension rod 31 and the inner rod 33 according to the drilling length. The inner rod 33 constitutes the inner pipe body of the double pipe perforation system, and since the inside is hollow, it also has a water supply function. The inner bit 34 is a piercing blade, and pierces the formation by directly applying the rotational force and the striking force transmitted through the extension rod 31, the inner coupling 32, and the inner rod 33 to the formation.

The application of the present invention is not limited to the double pipe perforation device, but may be applied to a single pipe perforation device. The single pipe perforation device is one in which a Kronen bit, which is a perforation blade, is attached to the tip of the casing 8 without using the inner, and the casing 8 and the coupling 11 can be attached and detached in the same manner as described above.

[0019]

[Effect of the device]

 According to the coupling of the punching device of the present invention, the tapered fitting portion is provided following the threaded portion of the cylindrical coupling. Therefore, when the cylindrical casing is screwed into the coupling, the casing is pushed to the screwing part while the tip of the casing is attached to the fitting part, and then the screwing work is performed. The casing and the coupling can be easily connected to each other without the need for alignment with.

Further, when the casing is removed from the coupling, one end of the casing is caught by the fitting portion when the screwing is released, so that the casing does not fall suddenly and the removal work can be safely performed. Furthermore, by forming a water channel in the fitting portion, water used for perforation can be smoothly circulated.

[Brief description of drawings]

FIG. 1 is a side view of a coupling used in a double pipe punching device according to an embodiment of the present invention.

FIG. 2 is a side view seen from the axial direction of the coupling.

FIG. 3 is an exploded perspective view of each member used in the punching device.

FIG. 4 is an explanatory view showing a schematic configuration of a conventional double pipe punching device.

FIG. 5 is a side view showing a configuration of a conventional coupling.

[Explanation of symbols]

 6 Swivel 7, 11 Coupling 8 Casing 11a, 11b Screw groove 12 Fitting part 13 Water passage hole

Claims (1)

[Scope of utility model registration request] 1. A coupling of a punching device, wherein the other end of a hollow cylindrical casing having one end to which a punching blade is mounted is detachably screwed to a driving body for rotating the punching blade, in at least the coupling. A coupling for a punching device, characterized in that a tapered fitting portion is formed at one end following a screwing portion.