JP4679221B2 - Pipe punching device - Google Patents

Description

  The present invention relates to a pipe drilling device for drilling a main pipe in order to attach, for example, a live pipe branching joint.

Conventionally, when a branch joint is attached to a buried main pipe in a state where gas is flowed and the branch pipe is connected, for example, as shown in Patent Document 1, a split-type branch joint having a branch port is used as the main pipe. The hole saw is projected from the cover attached to the top of the branch joint through the opening, and the main pipe is drilled. Then, the hole saw is taken out into the cover, the opening is closed, and the branch is branched. Connect the tubes.
JP2001-132877A

  However, when taking out the branch pipe from the buried main pipe, the branch saw is usually taken out from the main pipe to the side, so that the hole saw drills the side face of the main pipe toward a position eccentric from the pipe axis. Therefore, compared with drilling toward the tube axis, non-uniform and intense cutting reaction force is likely to occur. In particular, the cutting reaction force acts on a part of the hole saw blade at the start or end of drilling. However, for example, in the main pipe of about 300A, the drilling device is operated manually. There was a big impact on the worker.

  An object of the present invention is to solve the above-described problems and to provide a drilling device for a pipe that can effectively absorb a cutting reaction force during drilling and can smoothly drill.

Here, reference numerals corresponding to the embodiments are attached to the constituent members.
Invention of claim 1, the advancing and retracting drive shaft mounted for advancing and retracting the saddle member (3) to be attached to the perforated tube (1) (14), groups of the extending and retracting the drive shaft (14) end the linked boring rotary drive motor (17), in the tube for perforating apparatus and a tip perforating knife mounted (13) of the extending and retracting the drive shaft (14),
Between the saddle member (3) and the drilling rotary drive (17), the support member (71, 73) guides and rotates the drilling rotary drive (17) toward and away from the saddle member (3). )
The support member includes a slide bar (71) fixed to the saddle member (3) in parallel with the retracting drive shaft (14) via the connection support member (72), and a drilling rotary drive (17). A slide member (73) attached via an arm portion (17c) and slidably guiding the slide bar (71);
The at least one of the slide bar (71) and the connection support member (72) and at least one of the slide member (73) and the horizontal arm portion (17c ) is centered on the retracting drive shaft (14). A buffer member (74a, 74b) for buffering the impact force in the turning direction is interposed.
According to a second aspect of the invention, the advancing and retracting drive shaft mounted for advancing and retracting the saddle member (3) to be attached to the perforated tube (1) (14), groups of the extending and retracting the drive shaft (14) end the linked boring rotary drive motor (17), in the tube for perforating apparatus and a tip perforating knife mounted (13) of the extending and retracting the drive shaft (14),
Between the saddle member (3) and a drilling rotary drive motor (17), respectively projecting and retracting the drive shaft at both ends are fitted in (14) is saddle (3) and a drilling rotary drive motor (17) A guide cylinder (81) comprising an upper cylinder body (81a) and a lower cylinder body (81b) which are fixedly fitted and telescopically fitted to each other and prevented from rotating is provided.
A retractable drive shaft (14) is provided between at least one of the lower cylindrical body (81b) and the saddle member (3) and between the upper cylindrical body (81a) and the drilling rotary drive machine (17). A buffer member (82a, 82b) for buffering the impact force in the turning direction around the center is interposed.

According to a third aspect of the invention, the advancing and retracting drive shaft mounted for advancing and retracting the saddle member (3) to be attached to the perforated tube (1) (14), groups of the extending and retracting the drive shaft (14) end the linked boring rotary drive motor (17), in the tube for perforating apparatus and a tip perforating blades attached (3) of the extending and retracting the drive shaft (14),
A speed reducer (33) is interposed between the output shaft (17a) and the retracting drive shaft (14) of the rotary driving machine for drilling (17) ,
Between the gear box (16) and the saddle member (3) of the speed reducer (33), the speed reducer (33) is moved toward and away from the saddle member (3) in parallel with the retracting drive shaft (14). Provide guide rod (15) to guide and prevent rotation,
The passive arm (44) provided in the gear box (16) and the horizontal arm part (17c) provided in the rotary driving machine for drilling (17) are connected and supported in parallel with the retracting drive shaft (14). A bar (46)
At least one of the support bar (46) and the passive arm (44) , and at least one of the support bar (46) and the horizontal arm portion (17c) , in the swivel direction around the retractable drive shaft (14). A buffer member (47) for buffering the impact force is interposed.
According to a fourth aspect of the present invention, in the configuration of the third aspect,
The output shaft (17a) of the rotary drive unit for drilling (17) is passed through the base plate (42) fixed on the gear box (16) and the passive arm (44) arranged on the base plate (42). Forming a through hole (42a, 44a) and a transmission hole (43, 45) overlapping vertically on both sides of the through hole (42a, 44a),
A shock-absorbing rubber (47) cushioning member is interposed in the transmission hole (43, 45), and the vibration-proof rubber (47) is fixed to cover the upper and lower opening surfaces of the transmission hole (43, 45), respectively. A plate (49, 49) and a fixing bolt (50) penetrating the fixing plate (49, 49) and the anti-vibration rubber (47) are mounted in the transmission hole (43, 45). .
Invention of claim 5, the advancing and retracting drive shaft mounted for advancing and retracting the saddle member (3) to be attached to the perforated tube (1) (14), groups of the extending and retracting the drive shaft (14) end the linked boring rotary drive motor (17), in the tube for perforating apparatus and a tip perforating blades attached (3) of the extending and retracting the drive shaft (14),
A speed reducer (33) is interposed between the output shaft (17a) and the retracting drive shaft (14) of the rotary driving machine for drilling (17) ,
During the gear box (16) and the saddle member (3) of the reduction gear (33), toward and away from the reduction gear is fitted (33) to the saddle (3) in the projecting and retracting the drive shaft (14) An extendable guide tube (61) that guides in the direction to stop and prevents rotation,
Said parallel horizontal arm portion provided to the passive arm provided on the gear box (16) (44) and the puncture hole for a rotary drive motor (17) and (17c) in connection vital projecting and retracting the drive shaft (14) Provide support bar (46),
An impact in a turning direction about the retracting drive shaft (14) between at least one of the guide tube (61) and the gear box (16) and between the guide tube (61) and the saddle member (3). A buffer member (47, 62a, 62b) for buffering the force is interposed .

According to the invention of claim 1, a cutting reaction force is generated when the drilling tool hits one side by the buffer member interposed between the slide bar and the connection support member or between the slide member and the horizontal arm portion , Supports and cushions the impact force in the turning direction around the exit / retreat drive shaft transmitted from the exit / retreat drive shaft to the drilling rotary drive, and guides the movement of the drilling rotary drive during drilling Therefore, the drilled pipe can be cut and drilled smoothly.
According to the second aspect of the present invention , the perforating blade is hit by the buffer member interposed between the lower cylindrical body and the saddle member or between the upper cylindrical body (81a) and the rotary driving machine for perforating. The cutting reaction force is generated, and the impact force in the turning direction around the retracting drive shaft transmitted from the retractable drive shaft to the drilling rotary drive can be supported and buffered, and the drilling rotary drive Since the movement at the time of drilling is guided, the drilled pipe can be smoothly cut and drilled.

According to the third aspect of the present invention, even when the speed reducer is interposed on the retractable drive shaft, the buffer member interposed between the support bar and the passive arm or between the support bar and the horizontal arm portion. , and supports the drilling reaction force during drilling effectively, can buffer the turning direction of the impact around the extending and retracting the drive shaft, and can guide the movement during drilling of the drilling rotary drive machine smoothly.
According to the fifth aspect of the present invention, even when the speed reducer is interposed on the retractable drive shaft, the buffer member interposed between the guide cylinder and the gear box and between the guide cylinder and the saddle member, Effectively supporting the excavation reaction force at the time of drilling, it is possible to buffer the impact in the turning direction about the exit / retreat drive shaft and to smoothly guide the movement of the rotary drive for drilling at the time of drilling.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Embodiment 1]
This perforating apparatus is a pipe perforating apparatus, for example, for a branch joint for an active pipe that perforates without shutting off gas in a city gas supply pipe (hereinafter referred to as a main pipe) and connects the branch pipe to the main pipe. This is not a limitation.

The basic structure of this pipe punching apparatus will be described with reference to FIG.
A branch joint (saddle member) 3 for an active pipe attached to the main pipe 1 that is a perforated pipe, a retractable drive shaft 14 provided in the branch joint 3 so as to be freely retractable, and a retractable drive shaft 14 A drilling motor (drilling rotary drive machine) 17 connected to the base end part and a hole saw (drilling cutter) 13 attached to the distal end part of the retracting drive shaft 14 are provided. Further, a support member (15, 12b, 46) for guiding the drilling motor 17 in the approaching and separating direction to the branching joint 3 and preventing the drilling motor 17 from rotating between the branch pipe joint 3 and the drilling motor 17 is provided. Is provided.

  A gear box (reduction gear) 16 incorporating a reduction gear device (reduction gear) 33 is interposed in the retracting drive shaft 14, and the support member (15, 12 b, 46) is connected to the branch pipe joint 3. Between the gear box 16 and the drilling motor 17, and a movable support member (15, 12 b) that is slidably supported by the branch pipe joint 3 between the gear box 16 and the gear box 16. And a support bar 46, which is a fixed support member that is connected to and prevents rotation. Further, an anti-vibration rubber 47 (buffer member) is interposed between the passive arm 44 on which the support bar 46 is fixed upright and the gear box 16. The movable support member (15, 12b) is a canopy having a guide rod 15 fixed to the gear box 16 and a guide hole (guide portion) 12b attached to the perforated cover 11 to guide the guide rod 15 slidably. Part 12.

  With the above configuration, the cutting reaction force generated when the hole saw 13 hits the main tube 1 at the start or end of cutting is transmitted from the retracting drive shaft 14 to the drilling motor 17 via the reduction gear device 33. Is done. At this time, the impact force applied to the drilling motor 17 is supported by the gear box 16 including the reduction gear device 33 through the support bar 46 and the vibration isolating rubber 47, and the gear box 16 has two guide rods. 15 is supported by the perforated cover 11 having the canopy 12 and the branch joint 3. Therefore, for example, when drilling at an eccentric position deviating from the main tube axis, it is effective even if the cutting force, vibration, and impact force are large due to changes in the contact of the blade portion of the hole saw 13, the cutting surface, and the contact surface. Therefore, the drilling operation can be performed smoothly and safely. Of course, even when drilling from directly above the main tube 1, the impact force can be greatly buffered.

Details of the first embodiment will be described below with reference to FIGS.
As shown in FIG. 2 to FIG. 5, a branch joint (saddle member) 3 for a live pipe for connecting a branch pipe 2 made of a resin pipe or the like is attached to a main pipe 1 made of, for example, an iron pipe or a cast iron pipe. The branch joint 3 includes a joint body 3 </ b> A having a perforation chamber 4, a branch connection port 5, and a perforation opening (opening) 8, and a connection joint 3 </ b> B that is externally fitted to the main pipe 1. A plurality of fastening bolts 6 planted at the connection end of the joint body 3A are fitted into the mounting holes of the flanges of the coupling joint 3B and tightened with nuts, and the coupling body 3A and the coupling joint 3B are connected to the main pipe 1. The outer fitting is fixed.

  In the joint main body 3A, a connection opening 3b is formed in a circular arc concave surface 3a applied to the main pipe 1, and a sealing material 7 is provided on a contact surface around the connection opening 3b. A piercing chamber 4 communicating with the connection opening 3b is formed in the joint body 3A, and a branch connection port 5 is provided on the side of the piercing chamber 4 so as to face the connection opening 3b. A perforation opening 8 is formed on the surface.

  A shutter 9 and a perforation cover (saddle member) 11 that can freely open and close the perforation opening 8 are attached to the perforation opening 8 via an attachment jig 10 that can be opened and closed. The perforated cover 11 is inserted into a through hole 12a formed in the canopy 12 and a drive shaft (drive shaft main body 14c described later) 14 is rotatable about an axis through a guide shoe and is axially movable. A hole saw (piercing blade) 13 fitted to the front and rear drive shafts 14 is detachably fitted, and is configured to be able to move into and out of the perforation chamber 4 from the perforation cover 11 through the perforation opening 8. ing.

  Further, a pair of guide holes 12b, 12b are formed on both sides of the through hole 12a in the canopy portion 12, and a pair of guides that are synchronously moved in parallel with the retractable drive shaft 14 in these guide holes (guide portions) 12b, 12b. A rod 15 is disposed so as to be retractable in the axial direction via a guide shoe. The left and right guide rods 15 are connected to each other by a connecting member 31 rotatably connected to the retracting drive shaft 14 in the perforated cover 11 at the tip, and the guide rod 15 allows the retracting drive shaft 14 to be retracted and retracted. Guided. A bearing is interposed between the connecting member 31 and the retractable drive shaft 14.

  A speed reduction gear box 16 incorporating a speed reduction gear device 33 is interposed on the upper base end side of the extension / retraction drive shaft 14, and as shown in FIG. The speed reduction input shaft 14a and the speed reduction output shaft 14b of the speed reduction gear device 33 to which the output shaft 17a of 17 is connected, and a drive shaft main body 14c with a hole saw 13 attached to the front end portion thereof and retracted into and out of the perforated cover 11. It consists of and. The guide rod 15 has a base end connected to the gear box 16 and supports the cutting reaction force applied to the gear box 16 about the retracting drive shaft 14 by the guide rod 15.

  As shown in FIGS. 2 and 5, the shutter portion 9 has a mounting jig 10 fitted and fixed to the outer surface of the cylindrical portion of the opening 8 for piercing of the branch joint 3 by mounting bolts 10 a, and the outer periphery of the mounting jig 10. The lower casing 21 is attached to the three fixing bolts 10b erected at a predetermined angle with the nuts fixed with nuts. The shutter portion 9 includes a lower casing 21 and an upper casing 23, and a valve plate 25 disposed so as to be retractable between a storage chamber 26 and a communication chamber 27 formed between the upper and lower casings 21 and 23. And an operation rod 28 for moving the valve plate 25 back and forth, and a guide device 29 (a guide cover 29a, rack and pinions 29b and 29c, an open / close positioning tool, etc.). Accordingly, the valve plate 25 can be slid between the storage chamber 26 and the communication portion 27 by pushing and pulling the tip of the operation rod 28, and the opening portion 8 for drilling can be opened and closed via the communication portion 27.

  The hole saw 13 has a cylindrical shape with the upper end closed, a cutting blade (blade portion) 13b is formed around the lower end portion of the cylindrical main body 13a, and a retractable drive shaft 14 is connected to the center portion of the top plate 13c. . Although not shown, a chip collection tool (such as a magnet) is provided in the cylindrical main body 13a.

  A pair of left and right handles (operating members) 32 and 32 are attached to the reduction gear box 16, and as shown in FIG. 9, the guide rod 15 is inserted into the through holes 16a and 16a with a slit in the gear box 16. , 15 are respectively fitted, and the guide rod 15 is fixed at a position protruding slightly upward from the gear box 16 by fixing bolts 16b, 16b.

  As shown in FIGS. 6 and 7, the reduction gear device 33 is set so that a plurality of reduction gears are engaged with the gear box 16 to reduce the rotation speed to a predetermined rotation ratio. The output shaft 17a of the drilling motor 17 is detachably connected to the input shaft 14a of the reduction gear device 33 through a socket.

  An impact buffer 18 that cushions an impact between the gear box 16 and the drilling motor 17 will be described with reference to FIGS. 7, 8, and 10. The shock absorbing portion 18 includes a base plate 42 fixed to the base end portions of the guide rods 15 and 15, a plate-like passive arm 44 projecting sideways (forward in the drawing) from the base end portion of the base plate 42, A support bar 46 connected upward from the tip of the passive arm 44 and a vibration isolating rubber (buffer member) 47 interposed between the base plate 42 of the guide rod 15 and the passive arm 44 are provided. The upper end of the support bar 46 is connected and fixed to one horizontal arm 17c projecting from the motor body 17b of the drilling motor 17, and is arranged parallel to the output shaft 17a.

  That is, the base plate 42 is provided with a first insertion hole 42a through which the output shaft 17a is rotatably passed through the guide shoe 48, and fixing screws 42d and 42d on the sleeves 42c and 42c on the left and right sides of the first insertion hole 42a. Mounting holes 42b and 42b to which the guide rods 15 and 15 are fixed are formed, and the first transmission hole 43 and the mounting holes 42b and 42b are orthogonally crossed on both the front and rear sides of the first insertion hole 42a. 43 is formed. In addition, a second insertion hole 44a through which the output shaft 17a is rotatably passed through the guide shoe 48 and a first transmission hole 43 are provided at the base end portion of the passive arm 44 that is disposed so as to overlap the upper surface of the base plate 42. , 43 are formed so as to overlap the second transmission holes 45, 45. A cylindrical anti-vibration rubber 47 is interposed in the first and second transmission holes 43 and 45 that overlap in the vertical direction, and the anti-vibration rubber 47 includes the lower opening surface of the first transmission hole 43 and the second transmission hole. A pair of upper and lower fixing plates 49 covering the upper opening surface of 45, and a fixing bolt 50 for penetrating and fixing the vibration isolating rubber 47 and the fixing plate 49 are attached. The anti-vibration rubber 47 is configured to buffer the impact force transmitted from the base plate 42 to the passive arm 44 on a plane perpendicular to the axis of the retractable drive shaft 14. In addition, you may interpose vibration-proof rubber (buffer member) between the said support bar 46 and the connection tool 53 of the horizontal arm part 17c, or between the horizontal arm part 17c and the connection tool 53. FIG. Further, an anti-vibration rubber (buffer member) can be interposed between the upper end portion of the guide rod 15 or the mounting portion of the 12b.

  A holder cylinder 51 is attached to the free end of the passive arm 44, and the lower end of the support bar 46 is fixed by a screw 52. At the upper end of the support bar 46, a detachable connector 53 is attached to the horizontal arm portion 17c. The connector 53 connects clamp blocks 53a and 53b that can be opened and closed via a link 53c to a clamp screw with a handle. It is fastened and fixed with 53d.

Next, the attaching operation of the branch joint 3 will be described.
The branch joint 3 is externally fixed at a predetermined position of the main pipe 1. Next, the shutter portion 9 is attached to the opening portion 8 for drilling, and the retractable drive shaft 14 with the hole saw 13 and the guide rod 15, the gear box 16, and the shock absorbing portion 18 that are integrally assembled with the punching cover 11 are attached. Further, the output shaft 17 a of the drilling motor 17 is connected and fixed to the speed reducing input shaft 14 a of the speed reduction gear device 33, and the support bar 46 of the shock absorbing portion 18 is connected and fixed to the horizontal arm portion 17 c via the connecting tool 53. To do.

  Next, after the valve plate 25 of the shutter portion 9 is retracted by the operating rod 28 to open the communication chamber 26, the drilling motor 17 is activated and the hole saw 13 is moved via the speed reduction gear device 33 and the retracting drive shaft 14. The operator holds the horizontal arm portion 17c of the motor main body 17a and the handle 32 of the gear box 16 by hand, and further opens the shaft clamper 12c. When the drilling motor 17 and the gear box 16 are slowly lowered using their own weight, the hole saw 13 is lowered from the inside of the drilling cover 11 and reaches the drilling chamber 4 from the communication chamber 27. Then, the cutting blade 13b of the hole saw 13 contacts the main tube 1 to start cutting.

  At this time, since a part of the cutting blade 13b comes into contact with the main tube 1 from an oblique direction to start cutting, a large cutting reaction force in the rotational direction is instantaneously generated in the hole saw 13, resulting in an excessive impact force. Then, it is transmitted from the exit / retreat drive shaft 14 to the drilling motor 17 through the gear box 16. Conventionally, the worker feels a considerable impact force on the hand, but in this embodiment, the turning moment generated around the retracting drive shaft 14 generated in the drilling motor 17 is impact shock absorbing. The support bar 46 of the portion 18 is supported by the gear box 16 via vibration isolating rubbers 47, 47, and the gear box 16 is supported by the perforated cover 11 and the branch joint 3 via two guide rods 15. Since the impact force is greatly reduced and buffered, the worker feels a slight shock. As a result, the impact force applied to the piercing motor 17 can be effectively reduced, so that the operator is not forced to be excessively strained or burdened when drilling, and the drilling operation can be performed safely.

  When the drilling of the side of the main pipe 1 is completed, the drilling motor 17 and the gear box 16 are pulled up with the handle 32 and the drilling motor 17, and the hole saw 13 is returned from the drilling chamber 4 into the drilling cover 11. At this time, the chips are collected in the perforated cover 11 by a chip collecting tool (not shown). Then, the operation rod 28 of the shutter unit 9 is operated to close the communication chamber 27 with the valve plate 25. Further, the drilling motor 17 is removed, and the gear box 16 and the drilling cover 11 are removed. Then, using a special tool, a plug is attached to the opening 3b for drilling and closed.

  According to the above embodiment, as described above, particularly when drilling in a direction deviating from the axis of the main tube 1, the blade portion of the hole saw 13 hits the main tube 1 at the start or end of cutting. Excessive impact force is generated, but the impact buffering portion 18 having the support bar 46 connected between the gear box 16 and the drilling motor 17 and the guide rod 15 are effectively buffered and safely drilled. It can be performed.

  Also, a large support moment can be obtained by arranging the support bar 46 in parallel with the retractable drive shaft 14 (output shaft 17a) via the passive arm 44 and at a predetermined distance away from the support bar 46. Thus, the impact force can be effectively buffered and attenuated.

  Further, the base plate 42 and the passive arm 44 are provided with a plurality of anti-vibration rubbers 47 fitted into the first and second transmission holes 43 and 45 that overlap each other in the direction parallel to the axis of the retractable drive shaft 14. In addition, the impact force at the time of cutting can be buffered.

  Further, the output shaft 17a of the drilling motor 17 and the deceleration input shaft 14a of the gear box 16 are made detachable, and the support bar 46 and the horizontal arm portion 17c are made detachable by the connector 53, so The motor 17 and the gear box 16 can be easily assembled and separated, and transportation and handling are easy.

[Embodiment 2]
The second embodiment is a tube punching device provided with a guide tube 61 that can be expanded and contracted in place of the guide rod 15 of the first embodiment, and will be described with reference to FIGS. The same members as those in the first embodiment will be described with the same reference numerals.

  This pipe punching device includes a branch joint (saddle member) 3 attached to the main pipe 1, a retractable drive shaft 14 provided in the branch joint 3 so as to be freely retractable, and a base end of the retractable drive shaft 14. A drilling motor (drilling rotary drive machine) 17 connected to the unit, and a hole saw (drilling cutter) 13 attached to the tip of the retractable drive shaft 14. Between the branch pipe joint 3 and the drilling motor 17, support members (16, 61) for guiding the drilling motor 17 in the approaching and separating direction to the branch joint 3 and preventing the drilling motor 17 from rotating are provided. ing.

  A gear box 16 containing a reduction gear device (reduction device) 33 is interposed in the retracting drive shaft 14, and the support members (46, 61) are connected to the branch pipe joint 3 and the gear box 16. A guide cylinder (movable support member) 61 that is connected only freely to expand and contract, and a support bar (fixed support member) 46 that is connected between the gear box 16 and the drilling motor 17 to prevent rotation. It is configured.

  The guide cylinder 61 is fitted between the gear box 16 and the branch pipe joint 3 on the same axis as the extension / retraction drive shaft 14 and is extendable and retractable by two cylindrical cylinders 61a and 61b. The anti-rotation structure 63 is configured to guide the gear box 16 and the drilling motor 17 toward and away from the branch joint 3 and prevent them from rotating.

  That is, in the rotation preventing structure 63, the cylinders 61a and 61b are formed in a cylindrical shape, a plurality of protrusions 63a for rotation prevention are formed on the outer cylinder 61b, and a protrusion is formed on the inner cylinder 61a. A plurality of axial groove portions 63b that are slidably engaged with 63a are formed in the axial direction to constitute the spline type detent structure. As another anti-rotation structure, the cylinders 61a and 61b can be configured by selecting a polygonal cylinder such as a square cylinder or a hexagonal cylinder that does not require the anti-rotation portion.

Further, vibration isolating rubbers 62a and 62b, which are buffer members, are interposed in at least one of the connecting portion between the inner cylinder 61a and the gear box 16 and the connecting portion between the outer cylinder 61b and the branch joint 3. That is, four (a plurality of) transmission holes 65a and 65b are formed on the upper flange 61c of the inner cylinder 61a and the mounting flange 64 of the gear box 16 so as to be opposed to each other vertically, for example, by 90 °. A cylindrical anti-vibration rubber 62a is interposed in each of the transmission holes 65a and 65b, and the anti-vibration rubber 62a includes a pair of upper and lower fixing plates 66a and 66b covering the upper and lower opening surfaces of the transmission holes 65a and 65b, and The anti-vibration rubber 62a and the fixing plates 66a and 66b are attached by fixing screws 66c that pass through and fix. The shock-absorbing rubber 62 a is configured to buffer the impact force (rotational moment) transmitted from the reduction gear device 33 to the guide tube 61 on a plane perpendicular to the axis of the retractable drive shaft 14.

  Further, four (a plurality of) transmission holes 68a and 68b are formed on the lower flange 61d of the outer cylinder 61b and the mounting flange 67 of the perforated cover 11 so as to be opposed to each other vertically, for example, by 90 °. A cylindrical anti-vibration rubber 62b is interposed in each of the transmission holes 68a and 68b. The anti-vibration rubber 62b includes a pair of upper and lower fixing plates 69a and 69b covering the upper and lower opening surfaces of the transmission holes 68a and 68b, and The anti-vibration rubber 62b and the fixing plates 69a and 69b are attached by fixing bolts 69c that pass through and are fixed. The anti-vibration rubber 62b is configured to buffer the impact force (rotational moment) transmitted from the guide tube 61 to the branch joint 3 on a plane perpendicular to the axis of the retractable drive shaft 14.

According to the above configuration, by providing the guide tube 61 that can be expanded and contracted in place of the guide rod 15, the same effects as those of the first embodiment can be achieved.
[Embodiment 3]
The third embodiment is a tube punching device in which the reduction gear device 33 and the gear box 16 interposed in the retractable drive shaft 14 in the first embodiment are omitted, and will be described with reference to FIG. The same members as those in the first embodiment will be described with the same reference numerals.

  This pipe punching device includes a branch joint (saddle member) 3 for an active pipe attached to a main pipe 1 which is a pipe to be drilled, an exit / retreat drive shaft 14 provided in the branch joint 3 so as to be freely withdrawn and retracted, A drilling motor (a drilling rotary drive machine) 17 connected to the base end of the retracting drive shaft 14 and a hole saw (a punching tool) 13 attached to the tip of the retracting drive shaft 14 are provided. ing. A slide bar (support member) 71 is provided between the branch pipe joint 3 and the drilling motor 17 to guide the drilling motor 17 toward and away from the branch joint 3 and prevent the drilling motor 17 from rotating. ing. The slide bar 71 is erected on the branch pipe joint 3 via a connection support member 72, and is slidably connected by a slide guide 73 attached to the horizontal arm portion 17 c of the drilling motor 17. Anti-vibration rubbers (buffer members) 74 a and 74 b are interposed between at least one of the horizontal arm portion 17 c and the slide guide 73 and between the slide bar 71 and the connection support member 72.

Note that a reduction gear device 33 may be provided in the drilling motor 17.
In the above configuration, the drilling motor 17 is pushed down, the hole saw 13 is lowered via the retracting drive shaft 14, and the main tube 1 is drilled. The cutting reaction force generated when the hole saw 13 comes into contact with the main tube 1 at the start or end of the cutting is transmitted from the retractable drive shaft 14 to the drilling motor 17. The piercing motor 17 is supported by a slide bar 71 on a turning moment about the retracting drive shaft 14 with respect to the piercing motor 17, effectively buffering an impact force applied to the piercing motor 17, and piercing. It is possible to prevent an impact from being applied to the hand of the operator who operates the motor 17. Further, the impact force can be more effectively buffered by the vibration isolating rubbers 74a and 74b. Furthermore, the drilling motor 17 is guided by the slide bar 71, so that the lifting and lowering can be performed smoothly.

  Therefore, for example, when drilling at an eccentric position deviating from the main tube axis, it is effective even if the cutting force, vibration, and impact force are large due to changes in the contact of the blade portion of the hole saw 13, the cutting surface, and the contact surface. Therefore, the drilling operation can be performed smoothly and safely.

In Embodiment 3, the lower end portion of the slide bar 71 is fixed to the branch joint 3 via the connection support member 72, and the upper end side is slidably connected to the drilling motor 17 via the slide guide 73. The upper end portion of the slide bar 71 may be fixed to the drilling motor 17 and the lower end side may be slidably supported by the branch joint 3 via a slide guide.
[Embodiment 4]
The fourth embodiment is a tube punching device provided with a guide tube 81 that can only be expanded and contracted instead of the slide bar 71 of the third embodiment, and will be described with reference to FIGS. 15 and 16. The same members as those in the first and second embodiments will be described with the same reference numerals.

  That is, a branch joint (saddle member) 3 attached to the main pipe 1 which is a perforated pipe, a retractable drive shaft 14 provided in the branch joint 3 so as to be freely retractable, and a base of the retractable drive shaft 14 A drilling motor (drilling rotary drive machine) 17 connected to the end and a hole saw (drilling cutter) 13 attached to the tip of the retracting drive shaft 14 are provided. Further, between the branch pipe joint 3 and the drilling motor 17, a guide cylinder (supporting member) that can freely extend and contract, guides the drilling motor 17 in the approaching and separating direction to the branch joint 3 and prevents the drilling motor 17 from rotating. 81 is provided.

  The guide cylinder 81 includes upper and lower two-stage cylindrical cylinders 81a and 81b that are slidably fitted to each other, and includes the same detent structure 63 as in the second embodiment. Anti-vibration rubbers 82a and 82b, which are buffer members, are also interposed in the connecting portion between the upper cylinder 81a and the punching motor 17 and the connecting portion between the lower cylinder 81b and the punching cover 11. The interposition structure of these anti-vibration rubbers 82a and 82b is the same as that of the second embodiment, and therefore, the same reference numerals are given and description thereof is omitted.

  According to the above configuration, the same effect as that of the third embodiment can be achieved by providing the guide tube 81 that can be expanded and contracted in place of the slide bar 71 of the third embodiment.

It is a schematic block diagram which shows Embodiment 1 of the drilling apparatus for pipes which concerns on this invention. It is front sectional drawing of the punching apparatus for pipes. It is side surface sectional drawing of the punching apparatus for pipes. It is AA sectional drawing shown in FIG. It is BB sectional drawing shown in FIG. FIG. 3 is an enlarged cross-sectional view of a part E cut out shown in FIG. 2. It is side surface sectional drawing of FIG. It is CC sectional drawing shown in FIG. It is DD sectional drawing shown in FIG. It is a principal part enlarged view shown in FIG. It is a schematic block diagram which shows Embodiment 2 of the pipe drilling apparatus which concerns on this invention. It is an expanded longitudinal cross-sectional view which shows the guide cylinder of the drilling apparatus for the said pipes. It is EE sectional drawing shown in FIG. It is a schematic block diagram which shows Embodiment 3 of the drilling apparatus for pipes which concerns on this invention. It is a schematic block diagram which shows Embodiment 4 of the punching apparatus for pipes which concerns on this invention. It is an expanded longitudinal cross-sectional view which shows the guide cylinder of the drilling apparatus for the said pipes.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main pipe 2 Branch pipe 3 Branch joint 3a Connection opening 3b Drilling opening 4 Drilling chamber 5 Branch pipe connection port 8 Drilling opening 9 Shutter part 11 Perforation cover 12 Canopy part 12a Through hole 12b, b Guide hole 13 Hole saw 14 Retracting drive shaft 14a Deceleration input shaft 14b Deceleration output shaft 14c Drive shaft body 15 Guide rod 16 Gear box 17 Drilling motor 17a Output shaft 17b Motor body 17c Horizontal arm portion 18 Shock absorbing portion 33 Reduction gear device 42 Base plate 42a First insertion hole 43 First transmission hole 44 Passive arm 44a Second insertion hole 45 Second transmission hole 46 Support bar 47 Anti-vibration rubber 53 Connector 61 Guide cylinder 62a, 62b Anti-vibration rubber 71 Slide bar 72 Connection support member 73 Slide guide 74a, 74b Anti-vibration rubber 81 Guide tube 2a, 82b anti-vibration rubber

Claims (5)

And projecting and retracting the drive shaft mounted for advancing and retracting the saddle member to be attached to the drilling pipe, a rotary driving device for drilling, which is connected to the proximal end portion of the extending and retracting the drive shaft, the tip of the extending and retracting the drive shaft In a pipe drilling device comprising a drilling tool attached to a part,
Between the saddle member and the perforation rotating driving machine, provided with a support member for guiding and and detent in toward and away from the direction of a said drilling rotary drive motor to the saddle member,
The support member is attached to the saddle member via a connecting support member in parallel with the retracting drive shaft, and is attached to the rotary driving machine for drilling via a horizontal arm portion so that the slide bar can slide freely. A slide member for guiding,
For a pipe in which a buffer member for buffering an impact force in a turning direction about the retracting drive shaft is interposed between at least one of the slide bar and the connection support member and between the slide member and the horizontal arm portion . Drilling device. And projecting and retracting the drive shaft mounted for advancing and retracting the saddle member to be attached to the drilling pipe, a rotary driving device for drilling, which is connected to the proximal end portion of the extending and retracting the drive shaft, the tip of the extending and retracting the drive shaft In a pipe drilling device comprising a drilling tool attached to a part,
Between the saddle member and the rotary driving machine for drilling, it is fitted on the exit / retraction drive shaft, and both ends are fixed to the saddle member and the rotary driving machine for drilling, and are fitted to each other so as to be stretchable and non-rotating. Provided with a guide cylinder composed of an upper cylinder body and a lower cylinder body,
A buffer member is provided between the lower cylinder and the saddle member, and between at least one of the upper cylinder and the rotary driving device for drilling, to buffer the impact force in the turning direction about the retracting drive shaft. Perforated pipe device. And projecting and retracting the drive shaft mounted for advancing and retracting the saddle member to be attached to the drilling pipe, a rotary driving device for drilling, which is connected to the proximal end portion of the extending and retracting the drive shaft, the tip of the extending and retracting the drive shaft In a pipe drilling device comprising a drilling tool attached to a part,
A speed reducer is interposed between the output shaft of the rotary drive for drilling and the drive shaft
A guide rod is provided between the gear box and the saddle member of the speed reducer, parallel to the drive shaft, for guiding the speed reducer toward and away from the saddle member and preventing rotation.
Connecting a passive arm provided in the gear box and a horizontal arm provided in the rotary driving machine for drilling and providing a support bar parallel to the retracting drive shaft;
Tube perforation with a buffer member interposed between at least one of the support bar and the passive arm and between the support bar and the horizontal arm portion for buffering the impact force in the turning direction about the retracting drive shaft. apparatus. The base plate fixed on the gear box and the passive arm arranged on the base plate have an insertion hole through which the output shaft of the rotary driving machine for drilling penetrates, and a transmission hole overlapping vertically on both sides of the insertion hole. Forming,
A shock absorbing member made of vibration-proof rubber is interposed in the transmission hole,
4. The pipe punching device according to claim 3, wherein the vibration-proof rubber is attached to the transmission hole by a fixing plate that covers the upper and lower opening surfaces of the transmission hole, and a fixing bolt that penetrates the fixing plate and the vibration-proof rubber. . And projecting and retracting the drive shaft mounted for advancing and retracting the saddle member to be attached to the drilling pipe, a rotary driving device for drilling, which is connected to the proximal end portion of the extending and retracting the drive shaft, the tip of the extending and retracting the drive shaft In a pipe drilling device comprising a drilling tool attached to a part,
A speed reducer is interposed between the output shaft of the rotary drive for drilling and the drive shaft
Between the gear box and the saddle member of the reduction gear, provided with a telescopic guide tube that guides and and detent in the direction away from and closer to the reduction gear to the saddle member is externally fitted to projecting and retracting the drive shaft,
Provided parallel support bars connecting vital projecting and retracting the drive shaft and a horizontal arm portion provided on the passive arm and puncture holes for rotary drive motor provided on the gear box,
A pipe punching device in which a buffer member that cushions an impact force in a turning direction about a retracting drive shaft is interposed between at least one of the guide cylinder and the gear box and between the guide cylinder and a saddle member .

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