Automatic feed drilling machine

Abstract

To improve an automatic feed drilling machine.SOLUTION: An automatic feed drilling machine has an outer cylindrical body 20, and an inner cylindrical body 30 which is so supported inside the outer cylindrical body 20 as to movable along an axial direction of the outer cylindrical body 20, and a processing tool 70 is attached to a tip of the inner cylindrical body 30 in an extension direction. A speed reduction member 52 decelerates rotation of a motor 50 and rotationally drives a deceleration output shaft 53. A first drive gear 54 and a second drive gear 57 are rotationally driven together with the deceleration output shaft 53. A first driven gear 56 rotates together with the outer cylindrical body 20 according to rotation of the first drive gear 54. A feed screw shaft member 40 is provided inside the outer cylindrical body 20 and the inner cylindrical body 30, and threads are formed on an outer peripheral surface thereof. A female screw member 32 engages with the feed screw shaft member 40 and is integrally molded on a rear side in the extension direction of the inner cylindrical part 30. A second driven gear 59 rotates together with the feed screw shaft member 40 according to rotation of the second drive gear 57.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an automatic feed punching machine. [Background technology]

[0002] A drilling machine is used to drill holes in pipes for branching or the like. As described in Patent Documents 1 and 2, a hole saw or the like, which is a processing tool for drilling holes, is attached to the drilling machine. In the drilling machine of Patent Document 1, the hole saw is rotated by a motor while the handle is turned by hand to feed the hole saw toward the pipe material, thereby drilling a hole in the pipe material corresponding to the hole saw. However, in this case, the operator must manually turn the handle to direct the hole saw toward the tubing when drilling a hole in the tubing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-002948 A [Patent Document 2] Patent No. 6501365 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, as in Patent Document 2, attempts have been made to enable automatic feeding by adding a motor or the like to the drilling machine for feeding the hole saw toward the pipe material. However, when a drilling machine is provided with a first motor for rotating the hole saw and a second motor for automatically feeding the hole saw as in Patent Document 2, the drilling machine becomes larger and heavier. The operability and transportability of a drilling machine provided with an automatic feeding function are inferior to those of a drilling machine without the automatic feeding function.

[0005] Thus, there is a need for improvements in automatic feed punching machines. [Means for solving the problem]

[0006] The automatic feed drilling machine according to the present invention has a main body which rotatably and accommodably supports an outer tube and an inner tube which is supported inside the outer tube so as to be movable along the axial direction of the outer tube, and a processing tool can be attached to the tip end of the inner tube in the extension direction extending from the outer tube, and the automatic feed drilling machine comprises a motor provided in the main body to rotate and drive the outer tube together with the inner tube and the processing tool by rotating and driving the outer tube, a reduction member which reduces the rotation of the motor to rotate and drive a reduction output shaft, and a front end which is attached to the reduction output shaft and The gearbox comprises a first drive gear and a second drive gear which are driven and rotated together with the reduction output shaft, a first driven gear attached to the outer cylinder body and rotatable together with the outer cylinder body in accordance with the rotation of the first drive gear, a feed screw shaft member which is provided inside the outer cylinder body and the inner cylinder body and has a screw thread formed on its outer peripheral surface, a female screw member which screws into the feed screw shaft member and is integrally molded on the rear side of the inner cylinder body in the extension direction, and a second driven gear which is attached to the feed screw shaft member and rotatable together with the feed screw shaft member in accordance with the rotation of the second drive gear.

[0007] Preferably, the outer cylinder body, the inner cylinder body, and the feed screw shaft member are rotated in the same direction by the rotational driving force of the motor, and the first driving gear, the first driven gear, and the second driving gear, the second driven gear are configured so that the feed screw shaft member is driven at a slower rotational speed than the outer cylinder body and the inner cylinder body.

[0008] Preferably, the main body has a cylindrical portion that accommodates the outer tube body and the inner tube body, a motor housing portion that accommodates the motor outside the cylindrical portion so that the output shaft of the motor is aligned along the axial direction of the outer tube body, and a gearbox portion that is provided rearward of the cylindrical portion and the motor housing portion in the extension direction and accommodates the first drive gear, the first driven gear, the second drive gear, and the second driven gear.

[0009] Preferably, in the gear box portion, the rotation axis of the first driven gear attached to the outer cylinder body and the rotation axis of the second driven gear attached to the feed screw shaft member are coaxial and approximately parallel to the reduction output shaft to which the first driving gear and the first driven gear are attached, a first intermediate gear provided between the first driving gear and the first driven gear is meshed with the first driving gear and the first driven gear, and a second intermediate gear provided between the second driving gear and the second driven gear is meshed with the second driving gear and the second driven gear.

[0010] Preferably, in the gear box section, the second driving gear, the second intermediate gear, and the second driven gear are arranged rearward in the extension direction relative to the first driving gear, the first intermediate gear, and the first driven gear, the gear box section is provided with a clutch shaft member that supports the second intermediate gear, and an operating member for rotating the feed screw shaft member, the clutch shaft member is arranged so that a portion of the clutch shaft member is exposed to the outside of the gear box section, and the operating member is arranged so that a portion of the operating member is exposed to the outside of the gear box section.

[0011] Preferably, the gear box portion has a speed increasing member which accelerates the rotation of the operating member and transmits the rotation to the feed screw shaft member.

[0012] Preferably, the inner tube and the female threaded member molded integrally with the inner tube are provided on the inside of the outer tube, a long hole is formed in the outer tube along the axial direction, and a key member movable in the long direction inside the long hole of the outer tube is attached to the female threaded member molded integrally with the rear side of the inner tube in the elongation direction, together with a ring-shaped member provided on the outside of the outer tube, and the inner tube is supported inside the outer tube so as to be movable along the axial direction of the outer tube by engaging the key member inside the long hole of the outer tube. Effect of the Invention

[0013] In the present invention, the inner cylinder, to which the processing tool is attached, is supported by the main body so as to be rotatable together with the outer cylinder. The inner cylinder is supported inside the outer cylinder so as to be movable along the axial direction of the outer cylinder, and is rotationally driven together with the outer cylinder by rotational driving through a reduction member of a motor provided in the main body. This allows the processing tool attached to the tip of the inner cylinder in the extension direction to be rotationally driven. In the present invention, a second driving gear is attached to the reduction output shaft of the reduction member together with the first driving gear. Here, the first driving gear is for rotating the first driven gear attached to the outer cylindrical body together with the outer cylindrical body. In contrast, the second driving gear is for rotating the second driven gear attached to the feed screw shaft member provided inside the outer cylindrical body and the inner cylindrical body together with the feed screw shaft member. In the present invention, a screw thread is formed on the outer peripheral surface of the feed screw shaft member, and a female screw member formed integrally with the feed screw shaft member is screwed into the feed screw shaft member on the rear side of the inner cylindrical body in the extension direction. As a result, the motor for rotating the processing tool can also rotate the reduction member, the second drive gear, the second driven gear, and the feed screw shaft member. When the feed screw shaft member rotates, the female screw member that screws into the feed screw shaft member and the inner cylinder body with which the female screw member is integrally formed move in the axial direction of the feed screw shaft member. As a result, the inner cylinder body, which is supported inside the outer cylinder body so as to be movable along the axial direction of the outer cylinder body and to which the processing tool is attached, moves in the axial direction of the outer cylinder body while being rotated together with the outer cylinder body. By rotating and driving the inner cylinder body while extending relative to the outer cylinder body, the processing tool advances toward the tube material that is the processing target of the automatic feed drilling machine while rotating, and can process the tube material. Moreover, in the present invention, the driving force for rotation and the driving force for feeding are obtained from the driving force of a single motor. Compared to a configuration in which the driving force for rotation and the driving force for feeding are obtained from separate motors, the number of motors can be reduced, and the size and weight of the drilling machine with automatic feeding function can be reduced. The drilling machine of the present invention has excellent workability and transportability while having an automatic feeding function. In addition, in the present invention, the inner cylinder to which the processing tool is attached can be housed together with the outer cylinder in the main body, so that the operator will not inadvertently come into contact with the inner cylinder or the outer cylinder rotating inside the main body. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is an external view of an automatic feed punching machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a layout diagram of the internal structure of the main body of the automatic feed punching machine of FIG. [Diagram 3] FIG. 3 is a diagram illustrating a state in which the inner cylinder body of FIG. 2 is automatically fed forward in the extension direction in accordance with the rotation of the feed screw shaft member while rotating together with the outer cylinder body. [Figure 4] FIG. 4 is an exploded perspective view illustrating the detailed structures of the inner cylinder body, the outer cylinder body, and the feed screw shaft member of FIG. [Diagram 5] FIG. 5 is an explanatory diagram of the internal structure of the gear box portion of the main body of FIG. [Figure 6] FIG. 6 is an explanatory diagram of the internal structure of the gearbox, showing the clutch shaft member in FIG. 5 in a rear position in the extension direction and the second intermediate gear disengaged from between the second driving gear and the second driven gear. [Figure 7] FIG. 7 is a flow chart of a drilling procedure for forming a processed hole in a pipe material using the automatic feed drilling machine of FIG. [Figure 8] FIG. 8 is an explanatory diagram showing the automatic feed drilling machine, the tube, and the branch saddle member attached to the tube in a pre-operation state. [Figure 9] FIG. 9 is an explanatory diagram showing the automatic feed drilling machine attached to a branch saddle member that is attached to a pipe material. [Figure 10] FIG. 10 is an explanatory diagram of a state in which a pipe material is being drilled through a branch saddle member by an automatic feed drilling machine. [Figure 11] FIG. 11 is an explanatory diagram showing a state in which a processed hole has been formed in a pipe material by the automatic feed drilling machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] FIG. 1 is an external view of an automatic feed punching machine 1 according to an embodiment of the present invention. The automatic feed drilling machine 1 in FIG. 1 is used for drilling a processing hole 69 in a pipe material 80 to which a branch saddle member 81 is attached, as shown in FIG. 11 described later. 1 has a main body 2. The main body 2 of the automatic feed punching machine 1 has a cylindrical portion 3, a motor housing portion 4, a gear box portion 5, a mounting portion 6, a switch box 7, and a handle 10 for carrying.

[0017] The cylindrical portion 3 is a portion that houses a tool rotation drive body to which a machining tool such as a hole saw 70 is attached, as will be described later.

[0018] The mounting part 6 is provided at the tip of the cylindrical part 3. The mounting part 6 is a part for mounting the automatic feed punching machine 1 to the branch saddle member 81. Hereinafter, the direction from the cylindrical part 3 to the mounting part 6 will be referred to as the extension direction. The mounting part 6 is provided on the front side of the cylindrical part 3 in the extension direction. Further, a discharge pipe 8 is connected to the mounting portion 6. The discharge pipe 8 is provided with a manual on-off valve 9 that is normally closed.

[0019] As will be described later, the motor housing portion 4 is a portion that accommodates a motor 50 for rotating a tool rotation drive body and a machining tool such as a hole saw 70 attached to the tool rotation drive body.

[0020] As described later, the gear box portion 5 is a portion that accommodates drive transmission members such as gears for transmitting the rotational driving force generated in the motor housing portion 4 to a tool rotation driving body provided in the cylindrical portion 3. Also, a carrying handle 10 is attached to the gear box portion 5 .

[0021] The switch box 7 is a portion that houses a switch (not shown) for starting and stopping the motor 50 and the like.

[0022] In this embodiment, the cylindrical portion 3 and the motor housing portion 4 are arranged side by side. As a result, the direction of the output shaft 51 of the motor 50 and the axial direction of the tool rotation drive body are substantially parallel to each other. The direction of the output shaft 51 of the motor 50 is aligned with the axial direction of the tool rotation drive body. Moreover, the gear box portion 5 is provided on the rear side in the extension direction of the cylindrical portion 3 and the motor housing portion 4. The switch box 7 is attached to the outer surface of the motor housing portion 4.

[0023] However, a typical drilling machine does not have a function for automatically feeding the tool rotation drive body and the processing tool attached to the tool rotation drive body, such as the hole saw 70, in the axial direction of the tool rotation drive body. In this case, the operator must manually perform an operation for feeding the tool rotation drive body and the processing tool attached to the tool rotation drive body in the axial direction of the tool rotation drive body during drilling work. When forming the processing hole 69 in the tubular material 80, the operator must feed the hole saw 70 toward the tubular material 80, for example, by manually turning a handle provided on the drilling machine. The accuracy of the processed hole 69 formed in the pipe material 80 using the drilling machine can vary depending on the method of this feed operation. For this reason, the worker needs to become accustomed to the drilling work. In addition, when working on the pipe material 80 buried in the ground, the worker needs to insert his / her hand into the hole opened in the ground to operate the handle of the drilling machine, so the hole in the ground needs to be made large to ensure space for the hand. If the hole in the ground becomes large, it takes more time to form the hole and the amount of excavated soil increases. There is room for improvement in the workability and reduction of the work time of the drilling work using the drilling machine. For this reason, it is conceivable to provide the drilling machine with an automatic feed function. For example, it is conceivable to provide the drilling machine with a motor other than the above-mentioned motor 50 for rotating the machining tool, and to automatically feed the tool rotation drive body using this motor. However, adding a new motor 50 to the drilling machine means that the drilling machine is provided with a plurality of motors 50. As a result, the drilling machine becomes larger and heavier. The workability and transportability of the drilling machine provided with the automatic feed function are inferior to those of a drilling machine without the automatic feed function. Thus, there is a need to improve the automatic feed punching machine 1.

[0024] FIG. 2 is a layout diagram of the internal structure of the main body 2 of the automatic feed punching machine 1 of FIG. FIG. 3 is a diagram illustrating a state in which the inner cylinder body 30 in FIG. 2 is automatically fed forward in the extension direction in accordance with the rotation of the feed screw shaft member 40 while rotating together with the outer cylinder body 20. In FIG. 2 and 3, various bearing members for rotatably supporting each movable member, such as the inner cylinder 30, the outer cylinder 20, and the feed screw shaft member 40, on the main body 2, etc. are omitted.

[0025] As shown in FIGS. 2 and 3, the automatic feed punching machine 1 of this embodiment has a motor 50, an output shaft 51 of the motor 50, a reduction member 52, and a reduction output shaft 53 as components housed mainly in the motor housing portion 4. Furthermore, the automatic feed drilling machine 1 has an outer cylinder body 20, an inner cylinder body 30, a feed screw shaft member 40, and a female screw member 32 as members that are mainly housed in the cylindrical portion 3. The outer cylinder body 20 and the inner cylinder body 30 constitute the tool rotation drive body described above. In addition, the automatic feed punching machine 1 has, as components mainly housed in the gear box section 5, a first driving gear 54, a first relay gear 55, a first driven gear 56, a second driving gear 57, a second relay gear 58, a second driven gear 59, a clutch shaft member 11, and an operating member 12.

[0026] The motor 50 rotates the output shaft 51 by a switch (not shown) provided in the switch box 7. The motor 50 may be any of various motors, such as a DC motor with a brush, an AC brush motor, or a brushless motor. The motor 50 may be one that rotates the output shaft 51 in only one direction. The motor 50 is accommodated in the motor housing portion 4 so that the output shaft 51 is located on the rear side in the extension direction. A reduction gear member 52 is attached to the output shaft 51 of the motor 50. For example, a planetary gear may be used as the reduction gear member 52. The planetary gears in the reduction gear member 52 may be stacked in two or more stages. By configuring the planetary gears in a multi-stage configuration of two or more stages, it is possible to obtain a high reduction ratio in the reduction output shaft 53 of the reduction gear member 52 such that a desired cutting torque can be obtained while reducing the size of each planetary gear. The reduction gear member 52 can satisfactorily reduce the rotation of the output shaft 51 of the motor 50, and rotate the reduction output shaft 53 so that a desired cutting torque can be obtained. The reduction gear member 52 is housed in the motor housing portion 4 and the gear box portion 5 so that the reduction output shaft 53 is located on the rear side in the extension direction.

[0027] FIG. 4 is an exploded perspective view illustrating the detailed structures of the inner cylinder body 30, the outer cylinder body 20, and the feed screw shaft member 40 of FIG. As shown in FIGS. 2 and 3, the automatic feed drilling machine 1 mainly has an outer cylinder body 20, an inner cylinder body 30, a feed screw shaft member 40, and a female screw member 32, which are housed in the cylindrical portion 3.

[0028] The outer cylinder 20 has a cylindrical shape. A pair of elongated holes 21 are formed in the cylindrical circumferential surface of the outer cylinder 20. Each of the elongated holes 21 is formed in the cylindrical circumferential surface of the outer tubular body 20 so as to extend along the axial direction of the outer tubular body 20 .

[0029] The inner cylinder 30 has a cylindrical shape with a smaller radius than the outer cylinder 20 . A tool attachment hole 31 for attaching a tool such as a hole saw 70 is formed at the tip of the cylindrical inner cylinder 30 in the extension direction. A columnar female screw member 32 is integrally formed at the rear end in the extension direction of the cylindrical inner cylinder 30. A female screw hole 33 is formed through the center of the columnar female screw member 32. A pair of recesses are formed on the outer circumferential surface of the cylindrical female screw member 32. A key member 34 is disposed in each recess so as to protrude from the cylindrical outer circumferential surface of the female screw member 32. The pair of key members 34, together with an annular member 35, are screwed to the female screw member 32 by flat head screws 37. The annular member 35 is formed in an annular shape with an inner diameter larger than the outer tubular body 20. An indicator mark 36 is formed around the entire outer circumferential surface of the annular member 35 provided on the outside of the outer tubular body 20.

[0030] The feed screw shaft member 40 has a cylindrical shape, and a screw thread is formed on the entire outer circumferential surface of the cylinder.

[0031] Then, the inner cylinder body 30 is inserted into the outer cylinder body 20 together with the female screw member 32. At this time, the key members 34 protruding from the female screw member 32 are inserted from the elongated hole 21 of the outer cylinder body 20 after the inner cylinder body 30 and the female screw member 32 are inserted into the outer cylinder body 20. In addition, the pair of key members 34 are screwed into the female screw member 32 together with the annular member 35 by the flat head screws 37. In this manner, by adopting a structure in which the inner cylinder body 30 inside the outer cylinder body 20 and the annular member 35 outside the outer cylinder body 20 are connected by a pair of key members 34, the inner cylinder body 30 can rotate together with the outer cylinder body 20. Even if a high rotational load is applied during drilling, the inner cylinder body 30 can rotate well together with the outer cylinder body 20. Moreover, even if such a high rotational load is applied, the roundness of the inner cylinder body 30 is unlikely to decrease. Furthermore, the inner cylinder body 30 can be supported inside the outer cylinder body 20 so as to be movable along the axial direction of the outer cylinder body 20 with the pair of key members 34 received in the pair of elongated holes 21 of the outer cylinder body 20. The inner cylinder body 30 and the female screw member 32 can move in the longitudinal direction of the outer cylinder body 20 within the range of the elongated holes 21 of the outer cylinder body 20.

[0032] A feed screw shaft member 40 is inserted into the inner cylinder body 30 inserted into the outer cylinder body 20. The feed screw shaft member 40, which has a screw thread formed on its outer peripheral surface, screws into a female screw hole 33 formed in a female screw member 32 of the inner cylinder body 30 inside the outer cylinder body 20. 4, the inner cylinder body 30 housed in the outer cylinder body 20 moves in the extension direction together with the female screw member 32. The inner cylinder body 30 is fed in the extension direction as the feed screw shaft member 40 rotates.

[0033] Here, the position of the inner cylinder body 30 shown in FIG. 2 is the initial position which is the rearmost position in the extension direction. 3, the inner cylinder 30 has moved in the extension direction to a position where its tip in the extension direction protrudes from the mounting part 6 of the main body 2 of the automatic feed punching machine 1. In this state, the indicator mark 36 formed on the outer circumferential surface of the annular member 35 is in a position where it overlaps with the semi-transparent sight window member 13 formed on the cylindrical part 3 of the main body 2 of the automatic feed punching machine 1. The position of the indicator mark 36 can be seen from outside the automatic feed punching machine 1 through the sight window member 13 of the automatic feed punching machine 1.

[0034] FIG. 5 is an explanatory diagram of the internal structure of the gear box portion 5 of the main body 2 in FIG. FIG. 6 is an explanatory diagram of the internal structure of the gear box unit 5, showing the clutch shaft member 11 in FIG. 5 in a rear position in the extension direction and the second relay gear 58 disengaged from between the second driving gear 57 and the second driven gear 59. The automatic feed punching machine 1 has, as main components housed in the gear box section 5, a first driving gear 54, a first relay gear 55, a first driven gear 56, a second driving gear 57, a second relay gear 58, a second driven gear 59, a clutch shaft member 11, and an operating member 12.

[0035] The first drive gear 54 is attached to the reduced output shaft 53 . In addition, the second driving gear 57 is attached to the reduction output shaft 53 on the rear side of the first driving gear 54 in the extension direction. As a result, as indicated by dashed lines in FIGS. 5 and 6, the first driving gear 54 and the second driving gear 57 are rotated integrally together with the reduction output shaft 53.

[0036] The first driven gear 56 is attached to the rear side of the external cylinder body 20 in the extension direction. 5 and 6, the outer cylinder body 20 can rotate together with the first driving gear 54 in accordance with the rotation of the first driving gear 54. The rotation of the first driven gear 56 rotates the outer cylinder body 20 as shown by rotation A in FIG. 4, and rotates the inner cylinder body 30 as shown by rotation B in FIG.

[0037] The first intermediate gear 55 is provided between the first driving gear 54 and the first driven gear 56. The first intermediate gear 55 is rotatably supported, for example, on the main body 2. The first intermediate gear 55 is meshed with the first driving gear 54 and the first driven gear 56. As a result, when the first drive gear 54 rotates, the first intermediate gear 55 rotates by itself, thereby causing the first driven gear 56 to rotate.

[0038] The second driven gear 59 is attached to the rear side of the feed screw shaft member 40 in the extension direction. 5 and 6, the feed screw shaft member 40 can rotate together with the second driven gear 59 in accordance with the rotation of the second driven gear 59. The rotation of the second driven gear 59 becomes rotation C in FIG.

[0039] The second relay gear 58 is provided between the second driving gear 57 and the second driven gear 59. The second relay gear 58 is rotatably supported by a clutch shaft member 11 that is movably provided with respect to the main body 2, as described later. 5, the second intermediate gear 58 is meshed with the second driving gear 57 and the second driven gear 59. As a result, when the second driving gear 57 rotates, the second intermediate gear 58 rotates by itself, thereby causing the second driven gear 59 to rotate. 6, the second intermediate gear 58 is disengaged from between the second driving gear 57 and the second driven gear 59. In this case, even if the second driving gear 57 rotates, the second intermediate gear 58 does not rotate. The second intermediate gear 58 does not transmit the rotation of the second driving gear 57 to the second driven gear 59.

[0040] In this way, the rotation axis of the first driven gear 56 attached to the outer cylinder body 20 and the rotation axis of the second driven gear 59 attached to the feed screw shaft member 40 are coaxial and approximately parallel to the reduction output shaft 53 to which the first driving gear 54 and the first driven gear 56 are attached. In the gear box portion 5, the second driving gear 57, the second intermediate gear 58, and the second driven gear 59 are provided rearward in the extension direction relative to the first driving gear 54, the first intermediate gear 55, and the first driven gear 56.

[0041] The clutch shaft member 11 is formed in a substantially cylindrical shape. The clutch shaft member 11 is inserted into a through hole formed in a substantially cylindrical clutch guide portion 62 which is erected on the rear side surface of the gear box portion 5 of the main body 2 of the automatic feed drilling machine 1 in the extension direction. A second intermediate gear 58 is rotatably attached to a front portion in the extension direction of the clutch shaft member 11. As a result, the second intermediate gear 58 is rotatably supported by the clutch shaft member 11. A rear portion of the clutch shaft member 11 in the extension direction protrudes outside the main body 2 of the automatic feed punching machine 1. A pair of locking pins 65 are provided on the protruding portion of the substantially cylindrical clutch shaft member 11 so as to protrude from the cylindrical side surface. A pair of connecting slits 63 and a pair of detachment slits 64 are formed in a rear portion in the extension direction of the substantially cylindrical clutch guide portion 62. The connecting slits 63 are formed to be longer in the extension direction than the detachment slits 64. A spring material 66 in a compressed state is interposed between the inner surface of the gear box portion 5 of the main body 2 and the second relay gear 58 . With this structure, an operator can pull the substantially cylindrical clutch shaft member 11 rearward in the extension direction. 5, when the clutch shaft member 11 is released with the pair of locking pins 65 in the pair of connecting slits 63, the clutch shaft member 11 moves to the connecting position on the front side in the extension direction. In this case, the second intermediate gear 58 is located between the second driving gear 57 and the second driven gear 59. The second intermediate gear 58 is engaged with the second driving gear 57 and the second driven gear 59. 6, when the clutch shaft member 11 is released with the pair of locking pins 65 in the pair of release slits 64, the clutch shaft member 11 is in a release position on the rear side in the extension direction. In this case, the second intermediate gear 58 is positioned rearward in the extension direction from the position between the second driving gear 57 and the second driven gear 59. The second intermediate gear 58 is released from between the second driving gear 57 and the second driven gear 59. The second intermediate gear 58 is not engaged with either the second driving gear 57 or the second driven gear 59.

[0042] The operating member 12 is formed in a substantially cylindrical shape. The operating member 12 is inserted into a through hole formed in a rear portion of the gear box unit 5 of the main body 2 of the automatic feed punching machine 1 in the extension direction. A rear portion of the generally cylindrical operating member 12 in the extension direction is exposed to the outside of the main body 2 of the automatic feed drilling machine 1. A tool attachment hole 61 for fitting a tool such as a wrench is formed in the exposed portion of the operating member 12.

[0043] The operating member 12 is attached to the feed screw shaft member 40 together with the speed increasing member 60 . The speed-increasing member 60 is for accelerating the rotation of the operating member 12 and transmitting the rotation to the feed screw shaft member 40. For example, a planetary gear may be used as the speed-increasing member 60. By using the planetary gear in the opposite manner to the case of decelerating, the planetary gear can accelerate the rotation.

[0044] In this manner, the operating member 12 can be used to rotate the feed screw shaft member 40 . An operator can disengage the second relay gear 58 from the second driven gear 59 by operating the clutch shaft member 11 from the connected position of FIG. 5 to the disengaged position of FIG. In this state, an operator can rotate the operation member 12 to rotate the feed screw shaft member 40 by manual operation with a light rotation load using a wrench or the like.

[0045] As shown in FIG. 5, the first driving gear 54 and the second driving gear 57 rotate in the same direction together with the reduction output shaft 53 by the rotational driving force of the motor 50. The first intermediate gear 55 rotates in the opposite direction to the first drive gear 54. The first driven gear 56 rotates in the opposite direction to the first intermediate gear 55. The outer cylinder body 20 and the inner cylinder body 30 rotate in the same direction as the first driven gear 56. A machining tool such as a hole saw 70 attached to the inner cylinder body 30 rotates in the same direction as the first driven gear 56. The second intermediate gear 58 rotates in the opposite direction to the second drive gear 57. The second driven gear 59 rotates in the opposite direction to the second intermediate gear 58. The feed screw shaft member 40 rotates in the same direction as the second driven gear 59. In this manner, the outer cylinder body 20, the inner cylinder body 30, and the feed screw shaft member 40 can be rotated in the same direction by the rotational driving force of the single motor 50. 4. There is a speed difference between the rotation speed of the inner cylinder body 30 by the first driven gear 56 at rotation A in FIG. 4 and the rotation speed of the feed screw shaft member 40 by the second driven gear 59 at rotation C in FIG. Therefore, the inner cylinder 30 is fed in the extension direction at a speed according to the difference in rotational speed between the rotations A and C. A machining tool such as a hole saw 70 attached to the inner cylindrical body 30 moves in the extension direction at a feed speed according to the speed difference between the rotational speed of the inner cylindrical body 30 and the rotational speed of the feed screw shaft member 40.

[0046] A good combination of rotation speed and feed speed of a processing tool such as hole saw 70 varies depending on the processing tool that can be used, the pipe material 80 to be drilled, etc. The pipe material 80 may be made of a steel material that is relatively hard and difficult to drill holes in, or a resin material such as polyethylene that is relatively soft and easy to drill holes in. Basically, it is possible to drill a hole 69 in a tube material 80 by using a processing tool that corresponds to the tube material 80 to be drilled. However, the accuracy of the machined hole 69 formed by drilling, such as the circularity of the machined hole 69 and the surface roughness of the inner surface of the machined hole 69, is considered to be important when considering the pressure of the gas or water passed through the pipe material 80 and its service life due to changes over time. For this reason, in the automatic feed drilling machine 1 of this embodiment, it is advisable to narrow down the combinations of the pipe material 80 and the processing tools used therewith, thereby achieving a desirable balance between the rotation speed and feed speed of the processing tools. The above-mentioned various gears, reduction member 52, etc. may be designed taking these factors into consideration.

[0047] For example, by making the circumferential length of the first drive gear 54 slightly larger than the circumferential length of the second drive gear 57, the rotational speed C of the feed screw shaft member 40 can be made slightly slower than the rotational speed A of the inner cylinder body 30. By making the combination of the outer periphery and the number of teeth of each gear used in the second drive transmission system consisting of the second drive gear 57, the second intermediate gear 58, and the second driven gear 59 different from the combination of the outer periphery and the number of teeth of each gear used in the first drive transmission system consisting of the first drive gear 54, the first intermediate gear 55, and the first driven gear 56, the rotation speed of the feed screw shaft member 40 can be made appropriately slower than the rotation speed of the inner cylinder body 30. A predetermined feed speed for a machining tool rotating at a desired speed can be obtained from one motor 50.

[0048] Next, an example of a punching operation using the above-mentioned automatic feed punching machine 1 will be described. FIG. 7 is a flow chart of a drilling procedure for forming the machining hole 69 in the pipe material 80 using the automatic feed drilling machine 1 of FIG. FIG. 8 is an explanatory diagram showing the automatic feed drilling machine 1, a pipe material 80, and a branch saddle member 81 attached to the pipe material 80 in a pre-operation state. FIG. 9 is an explanatory diagram showing the automatic feed drilling machine 1 attached to a branch saddle member 81 attached to a pipe material 80. FIG. 10 is an explanatory diagram showing a state in which a pipe material 80 is being drilled through a branch saddle member 81 by the automatic feed drilling machine 1. As shown in FIG. FIG. 11 is an explanatory diagram showing a state in which a processed hole 69 has been formed in a pipe material 80 by the automatic feed drilling machine 1. As shown in FIG.

[0049] 8 to 11, the branch saddle member 81 has a gripping portion 82 that grips the pipe material 80 from above and below, a main cylindrical portion 83 that stands on the gripping portion 82, and a branch cylindrical portion 84 that protrudes from the side surface of the main cylindrical portion 83. A ball valve 87 is provided inside the main cylindrical portion 83 at a connection portion with the branch cylindrical portion 84. The ball valve 87 rotates in accordance with the rotation of the valve operating member 88 by rotating the valve operating member 88. By rotating the ball valve 87, the branch saddle member 81 switches between a state in which a lower portion 89 of the internal space of the main cylindrical portion 83 communicates with an upper portion 85 of the internal space, and a state in which a lower portion 89 of the internal space of the main cylindrical portion 83 communicates with an interior 86 of the branch cylindrical portion 84. Furthermore, the cylindrical pipe material 80 to which the branch saddle member 81 is attached may be made of steel. In this case, a machining hole 69 is drilled in a portion of the cylindrical tubular material 80 that corresponds to the main tubular portion 83 of the branch saddle member 81 .

[0050] In the gear connecting operation of step ST1 in Fig. 7, the operator operates the clutch shaft member 11 of the automatic feed drilling machine 1 to place the second relay gear 58 journaled on the clutch shaft member 11 between the second drive gear 57 and the second driven gear 59, as shown in Fig. 5. In this case, a pair of locking pins 65 provided on the clutch shaft member 11 enter a pair of connecting slits 63 provided in the substantially cylindrical clutch guide portion 62 of the main body 2.

[0051] In attaching the machining tool in step ST2, the operator attaches a machining tool such as a hole saw 70 to the automatic feed drilling machine 1. The operator simply attaches the machining tool to the tip end, in the extension direction, of the cylindrical inner cylinder body 30. At this time, the machining tool may be attached to the machining tool attachment hole 31 of the inner cylinder body 30. Since the gear connection operation was performed in step ST1, the inner cylinder body 30 does not move when attaching the machining tool. The operator can easily attach the machining tool to the inner cylinder body 30.

[0052] In mounting to the saddle in step ST3, the worker mounts the automatic feed drilling machine 1 to the branch saddle member 81 mounted to the pipe material 80. At this time, the worker simply mounts the mounting part 6 located at the tip in the extension direction of the main body 2 of the automatic feed drilling machine 1 to the branch saddle member 81 mounted to the pipe material 80. The automatic feed drilling machine 1 is mounted to the branch saddle member 81 as shown in Fig. 9 by moving the automatic feed drilling machine 1 close to the branch saddle member 81 from a position above the branch saddle member 81 (rear side in the extension direction) as shown in Fig. 8, for example.

[0053] In the gear release operation in step ST4, the operator operates the clutch shaft member 11 of the automatic feed drilling machine 1 to disengage the second relay gear 58 journaled on the clutch shaft member 11 from between the second drive gear 57 and the second driven gear 59, as shown in Fig. 6. In this case, a pair of locking pins 65 provided on the clutch shaft member 11 enter a pair of disengagement slits 64 provided in the substantially cylindrical clutch guide portion 62 of the main body 2.

[0054] In the saddle opening operation of step ST5, the operator rotates the valve operating member 88 of the branch saddle member 81 to which the automatic feed drilling machine 1 is attached, and opens the ball valve 87 of the branch saddle member 81. As a result, the internal space of the branch saddle member 81 communicates from the lower portion 89 to the upper portion 85 of the main cylinder portion 83.

[0055] In the manual operation of step ST6, the operator rotates the operating member 12 of the automatic feed drilling machine 1. The rotation of the operating member 12 is accelerated by the speed-up member 60 and transmitted to the feed screw shaft member 40. The rotation of the feed screw shaft member 40 allows a processing tool such as a hole saw 70 to move forward in the extension direction at high speed. At this time, the operator may fit a wrench into the power tool attachment hole 61 of the operating member 12 and manually operate the wrench. In addition, the manual distance by which a machining tool such as a hole saw 70 is fast-forwarded by hand is basically the distance from the initial position of the upper machining tool, as shown by multiple hole saws 70 in Figure 9, to the position of the lower machining tool that comes into contact with the outer peripheral surface of the tube material 80.

[0056] In the operation of confirming a normal contact in step ST7, the operator confirms the position of the indicator mark 36 through the observation window member 13, thereby confirming the position of the inner cylindrical body 30 that is fed together with the machining tool such as the hole saw 70. As shown in the lower position of Fig. 9, when the processing tool is in contact with or near the outer circumferential surface of the pipe material 80 to be drilled, the position of the indicator mark 36 confirmed through the sight window member 13 is in a predetermined position where drilling can begin. By checking that the position of the indicator mark 36 is in the predetermined position corresponding to the position of the processing tool in the lower part of Fig. 9, the operator can confirm that the processing tool is in a normal contact state. In contrast, for example, if the saddle opening operation in step ST5 is forgotten, or if the ball valve 87 is not opened to the desired state, the processing tool hits the ball valve 87 of the branch saddle member 81. In this case, the position of the indicator mark 36 is behind the predetermined position described above in the extension direction. Then, when the operator confirms from the position of the indicator mark 36 that the contact is normal, the operator advances the process to step ST10. If the position of the indicator mark 36 does not allow confirmation that the contact is normal, i.e., for example, if the contact occurs within a range where the indicator mark 36 is not visible, the ball valve 87 may be closed, so the operator proceeds to step ST8.

[0057] In checking whether the saddle is open in step ST8, the operator checks whether the ball valve 87 of the branch saddle member 81 to which the automatic feed drilling machine 1 is attached, such as in the valve operating member 88 of the branch saddle member 81, is open to the desired state. After confirming that the ball valve 87 is open to the desired state, the operator manually rotates the operating member 12 of the automatic feed drilling machine 1 in step ST9. The operator may repeat the processes of steps ST7 to ST9 until the position of the indicator mark 36 reaches the predetermined position described above. Then, when the position of the indicator mark 36 reaches the predetermined position described above, the operator advances the process to step ST10.

[0058] In the gear connecting operation in step ST10, the operator operates the clutch shaft member 11 of the automatic feed drilling machine 1 to place the second relay gear 58 journaled on the clutch shaft member 11 between the second drive gear 57 and the second driven gear 59, as shown in Fig. 5. In this case, a pair of locking pins 65 provided on the clutch shaft member 11 enter a pair of connecting slits 63 provided in the substantially cylindrical clutch guide portion 62 of the main body 2.

[0059] In the chip discharge operation by opening and closing the valve in step ST11, the operator opens the manual on-off valve 9 of the automatic feed drilling machine 1. A high-pressure fluid such as gas or water flows through a pipe material 80 in which a processing hole 69 is drilled. By opening the discharge pipe 8 connected to the mounting part 6, chips generated by the drilling operation can be discharged to the outside of the automatic feed drilling machine 1 through the discharge pipe 8 together with the high-pressure fluid.

[0060] At the start of drilling in step ST12, the operator turns on a switch (not shown) of the automatic feed drilling machine 1. This causes the motor 50 to start rotating. The rotation of the motor 50 is transmitted to the outer cylinder body 20 and the feed screw shaft member 40 through the above-mentioned reduction member 52 and various gears. The inner cylinder body 30, to which a processing tool such as a hole saw 70 is attached, rotates together with the outer cylinder body 20. Furthermore, as the feed screw shaft member 40 rotates, the inner cylinder body 30, which rotates together with the processing tool, is automatically fed forward in the extension direction. The machining tool, which rotates while being automatically fed, starts machining the tube material 80 from the outer circumferential surface of the tube material 80. Thereafter, the machining tool penetrates the outer circumferential surface of the tube material 80, as shown in FIG.

[0061] At the end of drilling in step ST13, the operator turns off a switch (not shown) of the automatic feed drilling machine 1. This stops the rotation of the motor 50. The rotation and automatic feed of the inner cylinder body 30 that rotates together with a processing tool such as the hole saw 70 also stops. Here, the operator may determine the end of drilling based on, for example, a predetermined time from the start of drilling. The operator may also determine the end of drilling based on the position of the indicator mark 36 that can be confirmed through the observation window member 13.

[0062] In the valve closing operation in step ST14, the operator closes the manual on-off valve 9 of the automatic feed drilling machine 1. This ends the discharge of high-pressure fluid from the automatic feed drilling machine 1. Furthermore, chips generated during the drilling operation from step ST12 to step ST13 can be discharged together with the high-pressure fluid to the outside of the automatic feed drilling machine 1 through the discharge pipe 8 before the valve closing operation in step ST14.

[0063] In the gear release operation in step ST15, the operator operates the clutch shaft member 11 of the automatic feed drilling machine 1 to disengage the second relay gear 58 journaled on the clutch shaft member 11 from between the second drive gear 57 and the second driven gear 59, as shown in Fig. 6. In this case, a pair of locking pins 65 provided on the clutch shaft member 11 enter a pair of disengagement slits 64 provided in the substantially cylindrical clutch guide portion 62 of the main body 2.

[0064] In the manual return operation of step ST16, the operator rotates the operating member 12 of the automatic feed drilling machine 1 in the opposite direction to that of step ST6. The rotation of the operating member 12 is accelerated by the speed-up member 60 and transmitted to the feed screw shaft member 40. The rotation of the feed screw shaft member 40 allows a machining tool such as a hole saw 70 to move at high speed toward the rear in the extension direction. At this time, the operator may fit a wrench into the power tool attachment hole 61 of the operating member 12 and manually operate the wrench. The operator operates the operating member 12 until the state shown in FIG. 5 is reached, for example. As a result, as shown in FIG. 11, a machined hole 69 is formed on the outer circumferential surface of the tube 80 by drilling.

[0065] In the saddle closing operation in step ST17, the operator rotates the valve operating member 88 of the branch saddle member 81 to which the automatic feed drilling machine 1 is attached, to close the ball valve 87 of the branch saddle member 81. This switches the internal space of the branch saddle member 81 to a state in which the lower part of the main cylindrical portion 83 communicates with the branch cylindrical portion 84.

[0066] In removing the attachment portion 6 of the automatic feed punching machine 1 from the branch saddle member 81 in step ST18, the operator removes the attachment portion 6 of the automatic feed punching machine 1 from the branch saddle member 81.

[0067] As described above, in this embodiment, the inner cylinder 30 to which a processing tool such as a hole saw 70 is attached is supported by the main body 2 so as to be rotatable together with the outer cylinder 20. The inner cylinder 30 is supported inside the outer cylinder 20 so as to be movable along the axial direction of the outer cylinder 20, and is rotationally driven together with the outer cylinder 20 by the rotational drive via the reduction member 52 of the motor 50 provided in the main body 2. This allows the processing tool attached to the tip of the inner cylinder 30 in the extension direction to be rotationally driven. In this embodiment, a second driving gear 57 is attached to the reduction output shaft 53 of the reduction member 52 together with the first driving gear 54. Here, the first driving gear 54 is for rotating the first driven gear 56 attached to the outer cylindrical body 20 together with the outer cylindrical body 20. In contrast, the second driving gear 57 is for rotating the second driven gear 59 attached to the feed screw shaft member 40 provided inside the outer cylindrical body 20 and the inner cylindrical body 30 together with the feed screw shaft member 40. In this embodiment, a screw thread is formed on the outer peripheral surface of the feed screw shaft member 40, and a female screw member 32 integrally formed on the rear side of the inner cylindrical body 30 in the extension direction is screwed into the feed screw shaft member 40. As a result, the motor 50 for rotating and driving a processing tool such as a hole saw 70 can also rotate and drive the reduction member 52, the second drive gear 57, the second driven gear 59, and the feed screw shaft member 40. When the feed screw shaft member 40 rotates, the female screw member 32 that screws into the feed screw shaft member 40 and the inner cylinder body 30 with which the female screw member 32 is integrally formed move in the axial direction of the feed screw shaft member 40. As a result, the inner cylinder body 30, which is supported inside the outer cylinder body 20 so as to be movable along the axial direction of the outer cylinder body 20 and to which a processing tool is attached, moves in the axial direction of the outer cylinder body 20 while being rotated together with the outer cylinder body 20. By rotating and driving the inner cylinder body 30 while extending relative to the outer cylinder body 20, the processing tool advances toward the pipe material 80, which is the processing target of the automatic feed drilling machine 1, while rotating, and can process the pipe material 80. Moreover, in this embodiment, the driving force for rotation and the driving force for feeding are obtained by the driving force of one motor 50. The number of motors can be reduced compared to a configuration in which the driving force for rotation and the driving force for feeding are obtained from separate motors. The size and weight of the drilling machine with the automatic feeding function can be reduced. The drilling machine of this embodiment has an automatic feeding function, but has the same workability and transportability as a drilling machine without the automatic feeding function. In this embodiment, the output of the motor 50 is not distributed to a rotational driving force and a feed driving force at the output shaft 51 of the motor 50, but is distributed to a rotational driving force and a feed driving force at the reduction output shaft 53 after the output of the motor 50 is reduced by the reduction member 52. Therefore, in this embodiment, the driving force is distributed at the reduction output shaft 53 where a high cutting torque is obtained, and it is possible to make it difficult for fluctuations in the driving force that may occur due to the distribution to occur. For example, when the processing tool starts to hit the tube material 80, a force that stops the rotation of the processing tool is likely to occur. This force that suppresses the rotation can act on the reduction output shaft 53 through the inner cylindrical body 30, the outer cylindrical body 20, the first driven gear 56, and the first driving gear 54. This reversely transmitted rotation suppression force can affect the rotation of the reduction output shaft 53 and the rotation of the second driving gear 57, the second driven gear 59, and the feed screw shaft member 40 that rotate in accordance with the rotation of the reduction output shaft 53. However, in this embodiment, the cutting torque of the reduction output shaft 53 is increased by deceleration. Therefore, it is possible to suppress the rotation fluctuation of the reduction output shaft 53. As a result, the rotation suppression force transmitted in reverse does not substantially affect the rotation of the feed screw shaft member 40, etc. The automatic feed is less likely to fluctuate even when the machining tool starts to hit the tubular material 80.

[0068] In this embodiment, the outer cylinder body 20, the inner cylinder body 30, and the feed screw shaft member 40 are rotated in the same direction by the rotational driving force of the motor 50. In addition, the first driving gear 54 and the first driven gear 56, and the second driving gear 57 and the second driven gear 59 are configured so that the feed screw shaft member 40 is driven at a slower rotation speed than the outer cylinder body 20 and the inner cylinder body 30. Thereby, the inner cylinder body 30 can be fed in the axial direction at a speed according to the difference in rotation speed with respect to the feed screw shaft member 40. The feed speed in the axial direction for the inner cylinder body 30 can be determined according to the difference in rotation speeds according to the difference between the gear ratio between the first driving gear 54 and the first driven gear 56 and the gear ratio between the second driving gear 57 and the second driven gear 59.

[0069] In this embodiment, the main body 2 has a cylindrical portion 3, a motor housing portion 4, and a gear box portion 5. Here, the cylindrical portion 3 accommodates an outer cylinder body 20 and an inner cylinder body 30. A feed screw shaft member 40, into which a female screw member 32 is screwed, is provided inside the outer cylinder body 20 and the inner cylinder body 30. The motor housing portion 4 accommodates a motor 50 and a reduction member 52 outside the cylindrical portion 3. The motor 50 is accommodated in the motor housing portion 4 so that its output shaft 51 is aligned along the axial direction of the outer cylinder body 20. The gear box portion 5 is provided on the rear side of the cylindrical portion 3 and the motor housing portion 4 in the extension direction. The gear box portion 5 accommodates a first driving gear 54, a first driven gear 56, a second driving gear 57, and a second driven gear 59. The main body 2 of the drilling machine having an automatic feed function that houses each part in such a layout can be made compact and lightweight.

[0070] In this embodiment, the first driven gear 56 and the second driven gear 59 provided in the gear box unit 5 have the same rotation axis. In addition, the rotation axis is approximately parallel to the reduction output shaft 53 to which the first driving gear 54 and the first driven gear 56 are attached. In addition, a first intermediate gear 55 is provided between the first driving gear 54 and the first driven gear 56 so as to mesh with the first driving gear 54 and the first driven gear 56. A second intermediate gear 58 is provided between the second driving gear 57 and the second driven gear 59 so as to mesh with the second driving gear 57 and the second driven gear 59. In this way, the gear box unit 5 can transmit the rotation of the reduction output shaft 53, which is driven to rotate by the motor 50, to the first driven gear 56 attached to the outer cylinder body 20 and the second driven gear 59 attached to the feed screw shaft member 40 in the gear box unit 5. Moreover, these various gears can be densely arranged in the gear box portion 5. The gear box portion 5 can be made small to the minimum necessary size.

[0071] In this embodiment, the second driving gear 57, the second intermediate gear 58, and the second driven gear 59 are provided in the gear box unit 5 on the rear side in the extension direction of the first driving gear 54, the first intermediate gear 55, and the first driven gear 56. The clutch shaft member 11 is inserted into a hole penetrating a part of the gear box unit 5 on the rear side in the extension direction. The clutch shaft member 11 journals the second intermediate gear 58 inside the gear box unit 5. A part of the clutch shaft member 11 is exposed to the outside of the gear box unit 5. This allows the operator to operate the clutch shaft member 11 so as to pull it outward. When the clutch shaft member 11 is operated so as to pull it outward, the second intermediate gear 58 is disengaged from between the second driving gear 57 and the second driven gear 59 so that the meshing between the second driving gear 57 and the second driven gear 59 is released. In this state, the operator can further rotate the operation member 12 to rotate the feed screw shaft member 40. Since the operation member 12 can be rotated in a state in which the meshing between the second intermediate gear 58 and the second driven gear 59 is released, the operator can rotate the feed screw shaft member 40 under a light load. By rotating the feed screw shaft member 40, the inner cylinder body 30 can be moved in the extension direction under manual operation. In particular, as in this embodiment, by providing an acceleration member 60 that accelerates the rotation of the operating member 12 and transmits it to the feed screw shaft member 40, it is possible to increase the amount of rotation of the feed screw shaft member 40 per unit rotation of the operating member 12. By increasing the amount of rotation of the feed screw shaft member 40, an operator can rotate the feed screw shaft member 40 under a light load, thereby manually moving the inner cylinder body 30 quickly in the extension direction.

[0072] In this embodiment, the inner cylinder 30 and the female screw member 32 integrally formed with the inner cylinder 30 are provided inside the outer cylinder 20. The outer cylinder 20 is formed with a long hole 21 along the axial direction. A key member 34 movable in the longitudinal direction inside the long hole 21 of the outer cylinder 20 is screwed to the female screw member 32 integrally formed on the rear side of the elongation direction of the inner cylinder 30 together with an annular member 35 provided on the outside of the outer cylinder 20. An indicator mark 36 is formed on the outer peripheral surface of the annular member 35. The inner cylinder 30 is supported inside the outer cylinder 20 so as to be movable along the axial direction of the outer cylinder 20 and can rotate together with the outer cylinder 20 by engaging the key member 34 inside the long hole 21 of the outer cylinder 20. Furthermore, a long observation window is formed in the cylindrical portion 3 of the main body 2 at a portion overlapping with the long hole 21 of the outer cylinder 20 . This allows the operator to check, through the viewing window, the longitudinal position of the indicator mark 36 of the annular member 35, which moves together with the key member 34 that is movable in the longitudinal direction inside the long hole 21 of the outer cylinder body 20. The operator can perform manual operation while checking the longitudinal position of the indicator mark 36 of the annular member 35. When manually operating a processing tool such as a hole saw 70 to move toward the tubular material 80, the operator can check the longitudinal position of the indicator mark 36 of the annular member 35 when the processing tool hits something else. Furthermore, the operator can easily determine whether the processing tool is hitting the tubular material 80 correctly based on the checked position. For example, when attaching branch saddle member 81 to pipe material 80 and attempting to drill machining hole 69 into pipe material 80 through branch saddle member 81, the opening / closing member of branch saddle member 81 may be closed. In this case, a machining tool such as hole saw 70 will hit the opening / closing member of branch saddle member 81 before hitting pipe material 80. The longitudinal position of indicator mark 36 of annular member 35 where this hit is obtained is different from the position where the machining tool hits pipe material 80. An operator can easily determine whether or not the machining tool is hitting pipe material 80 correctly based on the position where the hit is obtained.

[0073] The above-described embodiment is an example of one preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications and changes are possible without departing from the gist of the invention. [Explanation of symbols]

[0074] 1...automatic feed drilling machine, 2...main body, 3...cylindrical portion, 4...motor housing portion, 5...gear box portion, 6...mounting portion, 7...switch box, 8...discharge pipe, 9...manual opening and closing valve, 10...transport handle, 11...clutch shaft member, 12...operation member, 13...sight window member, 20...outer cylinder body, 21...long hole, 30...inner cylinder body, 31...machining tool mounting hole, 32...feed screw member, 33...feed screw hole, 34...key member, 35...annular member, 36...indicator mark, 40...feed screw shaft member, 50...motor, 51...output shaft, 52...reduction member, 53...reduction output shaft, 54...first drive Driving gear, 55...first intermediate gear, 56...first driven gear, 57...second driving gear, 58...second intermediate gear, 59...second driven gear, 60...speed increasing member, 61...work tool mounting hole, 62...clutch guide portion, 63...connection slit, 64...detachment slit, 65...locking pin, 66...spring material, 69...machining hole, 70...hole saw (machining tool), 80...tube material, 81...branch saddle member, 82...gripping portion, 83...main cylinder portion, 84...branch cylinder portion, 85...upper portion of internal space of main cylinder portion, 86...inside of branch cylinder portion, 87...ball valve, 88...valve operating member, 89...lower portion of internal space of main cylinder portion

Claims

1. An automatic feed drilling machine having a main body that rotatably and accommodably supports an outer cylinder and an inner cylinder that is supported inside the outer cylinder so as to be movable along the axial direction of the outer cylinder, and a processing tool can be attached to a tip end of the inner cylinder extending from the outer cylinder, a motor provided in the main body for rotationally driving the outer cylinder body, thereby rotationally driving the inner cylinder body and the processing tool together with the outer cylinder body; a reduction member that reduces the rotation speed of the motor to rotate a reduction output shaft; a first drive gear and a second drive gear attached to the reduction output shaft and rotatably driven together with the reduction output shaft; a first driven gear attached to the outer cylinder body and rotatable together with the outer cylinder body in accordance with the rotation of the first drive gear; a feed screw shaft member provided inside the outer cylinder body and the inner cylinder body and having a screw thread formed on an outer peripheral surface; a female screw member that is screwed into the feed screw shaft member and is integrally formed on a rear side of the inner cylinder body in an extension direction; a second driven gear attached to the feed screw shaft member and rotatable together with the feed screw shaft member in accordance with rotation of the second drive gear; An automatic feed punching machine having

2. the outer cylinder body, the inner cylinder body, and the feed screw shaft member are rotated in the same direction by a rotational driving force of the motor, The first driving gear and the first driven gear, and the second driving gear and the second driven gear, The feed screw shaft member is configured to be driven at a slower rotational speed than the outer cylinder body and the inner cylinder body.

2. The automatic feed punching machine according to claim 1.

3. The body includes: a cylindrical portion that accommodates the outer cylinder body and the inner cylinder body; a motor housing portion that houses the motor outside the cylindrical portion such that an output shaft of the motor is aligned along an axial direction of the outer cylinder body; a gear box portion provided on a rear side of the cylindrical portion and the motor housing portion in the extension direction, the gear box portion accommodating the first driving gear, the first driven gear, the second driving gear, and the second driven gear; 3. The automatic feed punching machine according to claim 2.

4. In the gear box section, a rotation axis of the first driven gear attached to the outer cylinder body and a rotation axis of the second driven gear attached to the feed screw shaft member are coaxial and substantially parallel to a reduction output shaft to which the first drive gear and the first driven gear are attached; A first intermediate gear is provided between the first driving gear and the first driven gear and meshes with the first driving gear and the first driven gear. A second intermediate gear is provided between the second driving gear and the second driven gear and meshes with the second driving gear and the second driven gear.

4. The automatic feed punching machine according to claim 3.

5. In the gear box portion, the second driving gear, the second intermediate gear, and the second driven gear are provided rearward in the extension direction with respect to the first driving gear, the first intermediate gear, and the first driven gear, The gear box portion is provided with a clutch shaft member that journals the second relay gear, and an operating member that rotates the feed screw shaft member, The clutch shaft member is provided such that a portion of the clutch shaft member is exposed to the outside of the gear box portion, The operating member is provided so that a part of the operating member is exposed to the outside of the gear box portion.

5. The automatic feed punching machine according to claim 4.

6. The gear box section includes: a speed increasing member that accelerates the rotation of the operating member and transmits the rotation to the feed screw shaft member; having 6. The automatic feed punching machine according to claim 5.

7. the inner cylindrical body and the female screw member integrally formed with the inner cylindrical body are provided on the inside of the outer cylindrical body, The outer cylinder has an elongated hole formed along the axial direction, A key member movable in the longitudinal direction inside the elongated hole of the outer cylindrical body is attached to the female screw member integrally formed on the rear side of the inner cylindrical body in the elongated direction together with an annular member provided on the outside of the outer cylindrical body, the key member is engaged with the elongated hole of the outer cylindrical body, so that the inner cylindrical body is supported inside the outer cylindrical body so as to be movable along the axial direction of the outer cylindrical body.

7. The automatic feed punching machine according to claim 6.

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