JPH082223Y2 - Perforator coupling - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casing single pipe punching device having a Kronen bit, a lost bit, etc. at its tip, and a double pipe punching device having a ring bit, an inner bit etc. at its tip, In particular, it relates to a coupling for detachably connecting a casing.

[0002]

2. Description of the Related Art First, a schematic structure of a conventional double pipe punching device will be described with reference to FIG. The traveling carriage 1 is composed of a tracked vehicle or the like, and an engine unit 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 part of the engine unit 2, and a drifter 5, a swivel 6, a coupling 7, a hollow cylindrical casing 8, a ring bit 9 which is a drilling blade, and the like are provided on the pedestal 4. When drilling a bank or the ground at a civil engineering site, etc., an operation unit (not shown) provided in the engine unit 2
Then, the hydraulic mechanism 3 is driven to tilt the pedestal 4 to a desired angle to position the ring bit 9 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 a ring bit 9 is driven in the hollow portion. It is designed to be used as a water supply path or for the inner rod to be inserted. In the conventional coupling 7, a screw groove 7a for screwing the casing 8 is formed on one end of the cylindrical body, and a screw groove 7b for screwing the swivel 6 on the other end. It is a thing. Here, an example of the dimensions of the coupling 7 will be described. The outer diameter of the position where the thread groove 7a is formed is 116 mm, and the outer diameter of one casing is 133.
mm, the weight is as much as 42 kg. Therefore, when the casing 8 is screwed into the coupling 7, it cannot be performed by one worker, and two workers hold it and fit it while adjusting the timing, and then perform screwing work.

[0004]

Since the screw groove 7a of the coupling 7 is formed up to the tip, the casing 8
When connecting, in other words, connecting, the tip of the casing 8 must be brought into contact with the tip of the screw groove 7a, and then the screw groove must be rotated so that the screw grooves fit into each other. In this case, if the center lines of the coupling 7 and the casing 8 are not completely aligned, the screws will not fit and the screwing cannot be performed. Moreover, since the connection work is performed by two workers while holding the casing 8, the connection cannot be smoothly made unless the force and breathing of the two, that is, the timings match.
Connection work was time-consuming.

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 slowly turns while applying force in preparation for the drop, and must hold it so as not to fall off the screw groove 7a and at the same time. . Therefore, it takes a lot of time to remove the casing 8.

Further, if the worker does not know that the casing 8 will fall at the same time as being disengaged from 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 is difficult to fit in the screw groove 7a of the coupling 7, and this hinders the next use. Furthermore, during drilling, it passes through the casing to the drilled part.
Water is supplied and slime in the perforated part is discharged together with water.
I am sorry. Like a double-pipe drilling device,
A member such as an inner rod is inserted through the pull ring.
Is water and slime, casing and coupling
Through the gap between the inner rod and other members,
Make sure that water and slime flow so as not to adversely affect the industry
Therefore, it is necessary to secure the flow path. The purpose of the present invention is to safely and easily carry out the attaching and detaching work with the casing.
Water and slime flow smoothly during drilling work.
The present invention provides a coupling for a punching device configured as described above.

[0007]

SUMMARY OF THE INVENTION The above object of the present invention is to removably screw the other end of a hollow cylindrical casing having a punching tool attached to one end thereof to a driving body for rotating the punching tool. In the hollow coupling of the drilling device,
A tapered fitting portion is formed at least one end of the coupling following the screwing portion, and the fitting portion has a circumferential surface penetrating the circumferential surface.
This is achieved by the coupling of a punching device, which is characterized in that a through-hole is formed therethrough.

In accordance with the present invention, when screwing the casing coupling, it is possible to guide the engagement portion by pushing over a casing tapered <br/> fitting portion of the tapered The connection work between the casing and the coupling becomes easy. In addition, when removing the casing from the coupling, one end of the casing should fit after unscrewing.
Since it hangs on the taper surface of the joint, it can be safely and easily removed without dropping suddenly. In addition, if only a tapered fitting part is formed,
The flow of fluid along the tapered surface is
The flow concentrates in a closed space between the walls and the flow becomes poor. Shi
However, since the water holes are formed on the peripheral surface of the fitting part,
A flow path is secured between the inside and outside of the pulling, and the tapered surface is
It does not resist the flow of water and slime, and water and slime do not pass through.
It will flow smoothly through the water holes and may adversely affect the drilling work.
Not.

[0009]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Needless to say, the present invention is not limited to this embodiment. FIG.
2 is a side view of a coupling to which the present invention is applied, FIG. 2 is a side view seen from the center direction of the coupling, and FIG. 3 is a perspective view showing a configuration of a main part of a rotary punching device according to an embodiment of the present invention. is there. Since the configuration of the entire apparatus and the configuration of each member except the coupling are as described with reference to FIG. 3, the same members are designated by the same reference numerals and description thereof will be omitted.

The coupling 11 in this embodiment is
A fitting portion 12 having a taper shape, in other words, a taper shape, is formed from the terminal end P of the screw groove 11a corresponding to the screwing portion in the present invention toward the tip end portion. Then, around the outer periphery of the fitting portion 12, water passage holes 13 that serve as water channels for water to be supplied into the soil at the time of punching are provided at appropriate intervals. The other end of the coupling 11 has a thread groove 1 for screwing into the swivel 6.
1b is formed. Note 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 the tip thereof into the fitting portion 12 . At this stage, the screw groove 11a and the screw groove formed inside the casing 8 do not match,
When the tip of the casing 8 reaches the position P by pushing in the longitudinal direction while being fitted in the fitting portion 12, the screw groove comes into contact with the position. In this state, if the center line between the coupling 11 and the casing 8 is not displaced and the casing 8 is rotated along the screw groove 11a, both can be screwed together. As can be understood from the above-described screwing work, it is not necessary to align the casing 8 with the thread groove 11a of the coupling 11 prior to screwing, and the casing 8 can be attached.
Fit it in 2 and roughly adjust the position before screwing. 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 rotated in the direction opposite to that when screwing. Then, when the tip of the casing 8 reaches the position P, it is removed from the screw groove 11a. Conventionally, when the position P is reached, the casing 8 may suddenly fall, but in the configuration of the present embodiment, the tip of the casing 8 once rests on the fitting portion 12, in other words, the inner surface of the casing 8 is It comes to hang on the fitting part 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.
Then, it descends along the taper surface and falls from the end of the fitting portion 12. Therefore, the worker concentrates on the rotation of the casing 8 without worrying about the fall until reaching the position P,
After reaching the position P, it may be pulled out so as not to be dropped. In this way, when removing the casing 8, it is not necessary to consider dropping when the screw is released from the screw groove 11a, so that the user can concentrate on the screw release. Further, the casing 8 may be separated from the coupling 11 by lowering it along the fitting portion 12, and in this case, consideration may be given to prevent the casing 8 from falling. Therefore, the removal work of the casing 8 can be performed safely and efficiently.

Next, the respective members 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 branches the water channels for water supply and drainage at the time of drilling. Although the cleaning adapter 22 is inserted into the cleaning swivel 6, the packing presser 23 closes the edge of the cleaning swivel 6 to prevent water leakage.

In the swivel 6, 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 is formed between the tip of the perforated hole and the inner rod 33 which is inserted into the casing 8. The slime discharged from the outlet is discharged from the discharge port 6b to the outside. Here, on the peripheral surface of the fitting part,
Since the water passage hole 13 is formed,
A waterway extending inside and outside of the coupling 11 is secured, and the coupling section
The flow of drilling water and slime in minutes becomes smooth,
Work can be done efficiently. Simply taping the tapered fitting 12
If only formed, the gap between the tapered surface and the inner wall of the casing
It becomes a closed space with one side closed, and water and slime
The liquidity of the product will deteriorate. But fitted as above
By forming the through holes 13 in the joint portion 12,
The liquidity of slime and slime does not decrease. In the assembled state of the apparatus, one end of the coupling 11 seems to be screwed to the swivel 6, but in reality, 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 the piercing is performed by rotating integrally with the casing 8.

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. Further, 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 as a position alignment between 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 may be said that the outer and inner are aligned.

The inner coupling 32 has an extension rod 31 and an inner rod 33 according to the drilling length.
And are rotatably connected. Inner rod 3
Reference numeral 3 constitutes the inner pipe body of the double pipe perforation system, and since the inside is hollow, it also has a water supply function. Inner bit 3
Reference numeral 4 denotes a piercing blade, which 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]

According to the coupling of the punching device of the present invention, the tapered fitting portion is provided subsequent to the threaded portion of the cylindrical coupling. Therefore, when a cylindrical casing is screwed into the coupling, the tip of the casing is once hung on the fitting portion, pushed to the screwing portion, and then the screwing operation is performed. The casing and the coupling can be easily connected to each other without the need to align the screw portion.

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 removing work can be safely performed. In addition, water is passed to the fitting part.
By forming the holes, the water used for drilling is
It can be smoothly distributed inside and outside
Work can be done smoothly.

[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 Thread groove 12 Fitting part 13 Water passage hole

Claims (1)

[Scope of utility model registration request] 1. A hollow coupling of a punching device, wherein the other end of a hollow cylindrical casing having one end to which a punching tool is mounted is detachably screwed to a driving body for rotating the punching tool. A tapered fitting part is formed at least at one end following the threaded part, and is formed on the peripheral surface of the fitting part.
A coupling for a punching device, wherein a water passage hole is formed so as to penetrate the peripheral surface .