JP2009255187A - Drill attachment tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a drill attachment tool which can be used in a no-water suspended construction method, has a simple structure, is inexpensive and hardly causes a problem in the disposal of a discharged fluid and swarf. <P>SOLUTION: The drill attachment tool 1 comprises a spindle 2 having a cutting edge structure 3 capable of being attached to its tip and having a drill capable of being attached to its rear end, and a mount 6 fitted with the spindle 2 in a water-tight manner and also rotatable and slidable on the spindle 2. The cutting edge structure 3 comprises a cutting edge forming part where a cutting edge is formed circumferentially at the tip, a leading edge forming part where a leading edge is formed to protrude from the cutting edge and a mounting shaft put on the spindle 2. A magnet 5 is attached to the spindle 2. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a drill mounting jig that is used by mounting a drill when an opening is formed in a fluid pipe in order to connect a branch pipe to an existing fluid pipe such as a water pipe or a gas pipe.

When renovating a building or piping equipment arranged in a building, a branch pipe is often connected to a fluid pipe such as an existing water pipe or gas pipe.
In such a case, first, the function of the piping facility is stopped, the fluid supply into the fluid pipe is stopped, and the fluid is discharged from the fluid pipe. Next, the fluid pipe is cut at an appropriate place, a T-type branch joint is inserted and welded to the cut place, and the branch pipe is connected via the T-type branch joint.

However, the work of cutting the fluid pipe at an appropriate location and welding the T-shaped branch joint requires a lot of labor and time.
Therefore, in recent years, an opening is formed in the side surface of the fluid pipe, a branch joint composed of a joint main body and a fixed band body is installed at the opening, and the branch pipe has been connected via this branch joint ( For example, see Patent Document 1).

JP 09-280461 A

However, even when the above-described branch joint is used, it takes time to discharge the fluid from the fluid pipe, and after connecting the branch pipe, it takes a long time to supply the fluid again into the fluid pipe and to operate the piping equipment. take time.
Therefore, recently, a so-called unrestricted water construction method, in which a branch joint is installed on the side surface of the fluid pipe, the piping equipment is put into operation, and an opening is drilled at the place where the branch joint is installed while fluid supply into the fluid pipe is continued. Has come to be adopted.

According to such a continuous water construction method, it is not necessary to stop the function of the piping facility, stop the fluid supply into the fluid pipe, discharge the fluid from the fluid pipe, supply the fluid again into the fluid pipe, and operate the piping facility. There is no need to do this, so the working time is greatly reduced.
In the continuous water construction method, an opening is drilled while fluid supply is continued, so that a dedicated branch joint with a valve and a dedicated drilling device are used so that a large amount of fluid does not flow out of the fluid pipe during operation ( For example, see Patent Documents 2, 3, 4, and 5).

JP 2000-81187 A JP 2004-34158 A JP 2004-125090 A JP 2005-106082 A

  However, in the continuous water construction method, conventionally, the structure is complicated, and therefore it is necessary to use an expensive branch joint with a valve and a dedicated drilling device. It was only used when connecting a branch pipe to a fluid main pipe such as a water pipe or a gas pipe.

In addition, the cutting waste generated when the opening is made in the fluid main pipe is discharged from the branch joint by the discharge fluid flowing out at the opening, but this is not a problem in outdoor piping equipment, but in indoor piping equipment The treatment of the discharged fluid and the cutting waste has been a big problem and not practical.

  The present invention has been made in view of such problems, and has a simple structure that can be used in the continuous water construction method. Therefore, the present invention is inexpensive, and even in indoor piping equipment, the discharge fluid and cutting An object of the present invention is to provide a drill mounting jig in which waste disposal is hardly a problem.

  In order to achieve the above object, the drill mounting jig of the present invention has a support shaft in which a cutting blade component can be mounted at the front end portion and a drill can be mounted at the rear end portion, and a watertight fit on the support shaft. And an attachment body that is rotatable and slidable with respect to the support shaft.

  The drill mounting jig of the present invention has a simple structure and is therefore inexpensive, and can be used simply by mounting on a commercially available drill, and there is no need to use a dedicated branch joint with a valve. .

  The cutting blade structure includes a cutting blade forming portion in which a cutting blade is formed in a circumferential direction at a distal end portion, a leading blade forming portion that protrudes from the cutting blade to form a leading blade, and a mounting shaft that is attached to the support shaft. It is preferable that it is comprised from the part.

  And it is preferable to attach a magnet body to the said support shaft.

  According to such a configuration, the cutting waste generated at the time of opening the opening can be efficiently attracted to the magnet body, and the cutting waste can be collected, and a large amount of fluid is not discharged unnecessarily.

  Further, it is preferable that a fixed body having a stirring groove formed on the outer peripheral surface is attached to the support shaft.

  According to such a configuration, it is possible to appropriately generate a water flow in the fluid discharged from the drilled opening and more efficiently adsorb the cutting waste to the magnet body.

  The stirring groove preferably has a spiral shape. Further, instead of the stirring groove, a stirring blade may be provided.

  The mounting body is composed of a front mounting body and a rear mounting body, and at least a seal is press-fitted into either the front mounting body or the rear mounting body, and the front mounting body and the rear mounting body are provided. It can be connected by screwing.

  An interposition member formed from a nonmagnetic material is disposed between the cutting blade structure and the magnet body in order to prevent the cutting blade structure from being magnetized and hindering the collection of cutting waste. You may make it do.

Hereinafter, a preferred embodiment of the drill mounting jig of the present invention will be specifically described with reference to the drawings.
Here, FIG. 1 is a side view of the drill mounting jig of the present invention, FIG. 2 is a side view of the drill mounting jig shown in FIG. 1 with the handle moved forward, and FIG. 4 is a side view of the drill mounting jig shown in FIG. 1, and FIG. 4 to FIG. 6 are partially cut side views of components of the drill mounting jig shown in FIG.

  As shown in FIG. 1, the drill mounting jig 1 of the present invention includes a support shaft 2, a cutting blade structure 3, a cutting blade fixing body 4, a magnet body 5, an attachment body 6, and a handle 7.

As shown in FIG. 4, the support shaft 2 is made of stainless steel or the like having high rigidity and water resistance in a round bar shape having a predetermined outer diameter.
A cutting blade mounting hole 2a is drilled at the front end portion, a small diameter drill mounting portion 2b is formed at the rear end portion, and a predetermined gap S is provided in the vicinity of the drill mounting portion 2b to form a disc-shaped clamping member 8, 8 is fixed.

As shown in FIG. 4, the cutting blade structure 3 is formed by molding high-speed steel or the like having high hardness into a predetermined shape, and includes a leading blade forming portion 9, a cutting blade forming portion 10, and a mounting shaft portion 11. Is done.
The leading blade forming portion 9 has a round bar shape, and the leading blade 9a is formed at a position protruding from the cutting blade 12a.
The cutting blade forming portion 10 includes a thin cylindrical portion 12 and a thin disc portion 13, and a cutting blade 12 a is formed in the circumferential direction at the distal end portion of the thin cylindrical portion 12.

  As shown in FIG. 4, the cutting blade fixed body 4 is made of stainless steel or the like having high rigidity and water resistance formed into a cylindrical shape with a predetermined outer diameter, and a support shaft fitting insertion hole 4a is formed at the center. It is drilled.

  As shown in FIG. 4, the magnet body 5 is formed of a magnetic material such as ferrite, alnico, or rare earth in an annular shape with a predetermined outer diameter, and a support shaft fitting insertion hole 5a is formed in the center portion. is there.

The mounting shaft portion 11 of the cutting blade structure 3 is fitted into the cutting blade mounting hole 2a of the support shaft 2, and the mounting shaft portion 11 is pressed and fixed by a set screw, whereby the cutting blade configuration is formed at the distal end portion of the support shaft 2. The body 3 can be worn.
Further, the tip end portion of the support shaft 2 is fitted into the support shaft fitting insertion hole 4a of the cutting blade fixing body 4, and the tip end portion of the support shaft 2 is pressed and fixed by a set screw, so that the tip end portion of the support shaft 2 is fixed. The cutting blade fixing body 4 can be attached.
Furthermore, if the tip of the support shaft 2 is inserted into the support shaft insertion hole 5 a of the magnet body 5, the magnet body 5 is attracted to the support shaft 2 by its magnetic force. The body 5 can be worn.

  As shown in FIG. 5, the attachment body 6 includes a front attachment body 14, an intermediate attachment body 15, and a rear attachment body 16 in which water-resistant stainless steel or the like is formed into a predetermined shape.

As shown in FIG. 5, the front attachment body 14 includes a front small diameter portion 17, an intermediate large diameter portion 18, and a rear small diameter portion 19, and a support shaft fitting insertion hole 14 a is formed in the center portion.
A male screw portion 17a is threaded on the outer peripheral surface of the front small-diameter portion 17, and a bearing fitting hole 17b is formed. A bearing 20 is press-fitted into the bearing fitting hole 17b.
A male screw portion 19a is threaded on the outer peripheral surface of the rear small diameter portion 19, and a seal fitting hole 19b is formed. A seal 21 is press-fitted into the seal fitting hole 19b.

As shown in FIG. 5, the intermediate mounting body 15 includes a front small diameter portion 22 and a rear large diameter portion 23, and a support shaft fitting insertion hole 15 a is formed in the center portion.
A connecting hole 22a is formed in the front small-diameter portion 22, and a female screw portion 22b is threaded on the inner peripheral surface of the connecting hole 22a.
A bearing fitting hole 23a is formed in the rear large diameter portion 23, and a bearing 24 is press-fitted into the bearing fitting hole 23a.

As shown in FIG. 5, the rear attachment body 16 is composed of a large-diameter disk portion 25 and a small-diameter cylindrical portion 26, and a support shaft fitting insertion hole 16 a is formed in the center portion.
A male thread portion 26 a is threaded on the outer peripheral surface of the small diameter cylindrical portion 26.

As shown in FIG. 5, the front attachment body 14 and the intermediate attachment body 15 can be coupled by screwing the male screw portion 19 a of the front attachment body 14 and the female screw portion 22 b of the intermediate attachment body 15. It is like that.
When the front mounting body 14 and the intermediate mounting body 15 are connected, a seal pressing body 27 is disposed in the connecting hole 22a of the intermediate mounting body 15 so that the seal 21 does not move in the axial direction in the seal fitting hole 19b. The side surface of the seal 21 is pressed.
As shown in FIG. 5, the intermediate mounting body 15 and the rear mounting body 16 abut the side end surface of the large-diameter disk portion 25 on the side end surface of the rear large-diameter portion 23, and bolts 28, 28,. Can be fastened and connected.

The support shaft 2 is inserted into the support shaft fitting insertion hole 14a of the front attachment body 14, the support shaft fitting insertion hole 15a of the intermediate attachment body 15, and the support shaft fitting insertion hole 16a of the rear attachment body 16, and the front attachment body 14 and The intermediate attachment body 15 can be connected, and the intermediate attachment body 15 and the rear attachment body 16 can be connected to be attached to the support shaft 2.
Here, the front mounting body 14, the intermediate mounting body 15 and the rear mounting body 16 are integrated to form the mounting body 6. However, the front mounting body 14, the intermediate mounting body 15 and the rear mounting body 16 are Since it is not fixed to the support shaft 2, the support shaft 2 is rotatable and slidable with respect to the attachment body 6.

  As shown in FIG. 6, the handle 7 includes a connecting body 29, a holding body 30, and gripping members 31, 31 formed of stainless steel having water resistance into a predetermined shape.

  As shown in FIG. 6, the connecting body 29 includes a small diameter cylindrical portion 32 and a large diameter disk portion 33, and a screw hole 29 a is formed at the center.

As shown in FIG. 6, the holding body 30 is made of stainless steel or the like formed into a thick disk shape having a predetermined outer diameter, and has a support shaft fitting insertion hole 30a formed in the center.
On the peripheral side surface, the holding members 31, 31 are fixed at opposite positions, and a locking member fitting insertion hole 30b is formed from the peripheral side surface to the central portion.
The locking member 34 includes a locking plate portion 34a and a gripping portion 34b. The locking member 34 is inserted into the locking member insertion hole 30b and is movable in the radial direction. Then, the locking member 34 is set to an appropriate position by pressing the locking plate 34a by the fixing member 35 including the screw portion 35a and the gripping portion 35b.

  As shown in FIG. 6, the connecting body 29 and the holding body 30 are connected by abutting the side end face of the connecting body 29 on the side end face of the holding body 30 and fastening them with bolts 36, 36,. Can be done.

By screwing the male screw portion 26a of the rear attachment body 16 and the screw hole 29a of the connection body 29, the rear attachment body 16 and the connection body 29 can be connected, and the support shaft 2 is connected to the screw hole 29a. And it can mount | wear to the support shaft 2 by inserting in the support shaft fitting insertion hole 30a.
Here, the connecting body 29, the holding body 30, and the gripping members 31, 31 integrally constitute the handle 7, but since the connecting body 29 and the holding body 30 are not fixed to the support shaft 2, On the other hand, the support shaft 2 is rotatable and slidable.

As shown in FIG. 1, the support shaft fitting insertion hole 30 a has an inner diameter into which the holding members 8, 8 can be inserted, and the thickness T of the locking plate portion 34 a is a gap between the holding members 8, 8. S is slightly smaller than S.
Therefore, in the support shaft fitting insertion hole 30a, when the position of the gap S between the holding members 8 and 8 substantially coincides with the position of the locking member fitting insertion hole 30b, the locking plate portion 34a is pushed into the axial direction. With respect to the above, the support shaft 2 and the handle 7 are moved together.

  The drill mounting jig 1 according to the present invention has the above-described configuration. By using the drill mounting jig 1 as described below, a piping joint is set in an operating state, and a branch joint is installed while fluid supply into the fluid pipe is continued. It is possible to implement a continuous water construction method in which an opening is drilled at the location.

  First, as shown in FIG. 7, the inner surface of the joint body 52 of the branch joint 51 is brought into contact with the side surface of the fluid pipe 41, and the inner surface of the fixed band 53 of the branch joint 51 is brought into contact with the opposite side surface of the fluid pipe 41. Then, the joint body 52 and the fixed band body 53 are coupled by the bolt 54 and the nut 55, and the branch joint 51 is attached to the side surface of the fluid pipe 41.

Next, one end of the connecting member 61 is screwed into the opening of the joint body 52, the other end of the connecting member 61 is screwed into the one end opening of the take-out valve 71, and the take-out valve 71 is connected to the branch joint 51. Let
Next, the other end opening of the take-out valve 71 is screwed into one end opening of the main pipe 82 of the discharge pipe 81, and the discharge pipe 81 is connected to the take-out valve 71.

  Next, as shown in FIG. 8, the male screw portion 15 a of the front mounting body 13 of the drill mounting jig 1 is screwed into the other end opening of the main pipe 82 of the discharge pipe 81 and attached to the discharge pipe 81. The drill mounting jig 1 is mounted by connecting the bodies 6.

Next, as shown in FIG. 9, the drill mounting jig 1 is connected to the drill mounting portion 2 b of the support shaft 2 of the drill mounting jig 1 by appropriately connecting a drilling shaft mounting portion 92 of the drill 91 via a connecting member. A drill 91 is attached to the.
Here, the handle 72 of the take-out valve 71 is rotated to open the valve body 73, and the cock 84 installed in the discharge pipe 83 of the discharge pipe 81 is rotated to open the valve body 85. is there.

Next, the gripping member 31 of the handle 7 is gripped, the handle 7 is rotated and moved forward, whereby the support shaft 2 of the drill mounting jig 1 is moved forward, and the cutting blade structure 3 is moved to the fluid tube. 41 abuts on the side of 41.
Then, as shown in FIG. 10, the power of the drill 91 is turned on and the support shaft 2 is driven to rotate the cutting blade constituting body 3, thereby opening an opening on the side surface of the fluid pipe 41.

When the opening is drilled, the fluid flowing in the fluid pipe 41 flows out from the drilled opening, flows through the take-out valve 71, the main pipe 82 of the discharge pipe 81, and the discharge pipe 83. It discharges from one end opening.
At this time, cutting scraps of the fluid pipe 41 are also generated, but the cutting scraps are conveyed backward together with the spiral flow of the fluid and are attracted to the surface of the magnet body 5.

Next, as shown in FIG. 11, the power of the drill 91 is turned off, the drive of the support shaft 2 is stopped, and the cutting blade structure 3 is stopped.
Then, after turning the cock 84 of the discharge pipe 81 to close the valve body 85, the handle 7 is rotated to move the support shaft 2 backward.

Next, when the cutting blade structure 3 passes through the take-out valve 71, the handle 72 of the take-out valve 71 is rotated to bring the valve body 73 into a closed state.
Next, reversely to the above procedure, as shown in FIG. 12, the drill 91 is removed from the drill attachment jig 1, the drill attachment jig 1 is removed from the discharge pipe 81, and the discharge pipe 81 is connected from the take-out valve 71. Remove and finish the opening drilling operation.

  As described above, the drill mounting jig 1 of the present invention has a simple structure in which the support shaft 2 includes the cutting blade structure 3, the cutting blade fixing body 4, the magnet body 5, the attachment body 6, and the handle 7. It is inexpensive and can be used by simply mounting it on a commercially available drill 91. Moreover, since it is not necessary to use a dedicated valve-equipped branch joint, it can also be used for indoor piping equipment. it can.

  Moreover, since the drill mounting jig 1 of the present invention has a structure in which the magnet body 5 is disposed behind the cutting blade fixed body 4, the cutting waste generated at the time of drilling the opening is efficiently transferred to the magnet body 5. It can be adsorbed, cutting scraps can be collected, and a large amount of fluid is not discharged unnecessarily.

In addition, you may form the stirring groove | channel which exhibits spiral shape, and the stirring groove | channel which exhibits diagonal form in the outer peripheral surface of the cutting blade fixed body 4. FIG.
With such a configuration, the spiral flow can be more efficiently formed by the stirring groove, the cutting waste generated at the time of drilling the opening can be efficiently adsorbed to the magnet body 5, and the cutting waste can be collected. In addition, it does not unnecessarily discharge a large amount of fluid.
Further, instead of the stirring groove, stirring blades may be attached to the outer peripheral surface of the cutting blade fixing body 4 by welding or the like.

In the above embodiment, since the cutting blade fixing body 4 is adjacent to the magnet body 5, when the drill mounting jig 1 is used for a long period of time, the cutting blade fixing body 4 is easily magnetized, and the cutting waste is recovered. There is also a risk that it may cause trouble.
Therefore, an interposed member formed from rubber, plastic, ceramic, or the like may be disposed between the cutting blade fixing body 4 and the magnet body 5.

It is a side view of the drill mounting jig of this invention. In the drill mounting jig shown in FIG. 1, it is a side view of the state which moved the handle ahead. In the drill mounting jig shown in FIG. 1, it is a side view of the state which moved the support shaft back. It is a partially cutaway side view of the structural member of the drill mounting jig shown in FIG. It is a partially cutaway side view of the structural member of the drill mounting jig shown in FIG. (A) of the structural member of the drill mounting jig shown in FIG. 1 is a partially cut side view, and (B) is a front view. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention. It is explanatory drawing which shows each process of the continuous water construction method implemented using the drill mounting jig of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drill mounting jig 2 Support shaft 2a Cutting blade attachment hole 2b Drill mounting part 3 Cutting blade structure 4 Cutting blade fixed body 4a Support shaft fitting insertion hole 5 Magnet body 5a Support shaft fitting insertion hole 6 Attachment body 9 Leading blade formation part 9a Leading blade 10 Cutting blade forming portion 11 Mounting shaft portion 12a Cutting blade 14 Front mounting body 14a Support shaft fitting insertion hole 15 Intermediate mounting body 15a Support shaft fitting insertion hole 16 Rear side mounting body 16a Support shaft fitting insertion hole 17b Bearing fitting Hole 19b Seal fitting hole 20 Bearing 21 Seal 23a Bearing fitting hole 24 Bearing 27 Seal pressing body

Claims (8)

A support shaft in which the cutting blade structure can be mounted on the front end and a drill can be mounted on the rear end;
A fitting that is fitted in a watertight manner on the support shaft and is rotatable and slidable with respect to the support shaft
A drill mounting jig characterized by comprising:   The cutting blade structure includes a cutting blade forming portion in which a cutting blade is formed in a circumferential direction at a distal end portion, a leading blade forming portion that protrudes from the cutting blade to form a leading blade, and a mounting shaft that is attached to the support shaft. The drill mounting jig according to claim 1, comprising: a portion.   The drill mounting jig according to claim 1 or 2, wherein a magnet body is mounted on the support shaft.   The drill mounting jig according to any one of claims 1 to 3, wherein a fixed body having a stirring groove formed on an outer peripheral surface is mounted on the support shaft.   The drill mounting jig according to claim 4, wherein the stirring groove has a spiral shape.   The drill mounting jig according to claim 4 or 5, wherein a stirring blade is provided instead of the stirring groove.   The mounting body is composed of a front mounting body and a rear mounting body, and at least a seal is press-fitted into either the front mounting body or the rear mounting body, and the front mounting body and the rear mounting body are provided. The drill mounting jig according to claim 1, wherein the drill mounting jig is connected by screwing.   The drill mounting jig according to any one of claims 3 to 7, wherein an interposition member formed of a nonmagnetic material is disposed between the cutting blade constituent body and the magnet body.

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