Piercing device

Abstract

The perforating device according to one embodiment of the present application is characterized by including: a cutting tip; a driving device for rotationally driving the cutting tip; a supply flow path for supplying a coolant to the cutting tip; and a tube pump for pressure-feeding the coolant in the supply flow path to the cutting tip, the tube pump including: a supply tube configured as a part of the supply flow path; and a first pressing mechanism for pressing the supply tube, the first pressing mechanism being driven by the driving device.

Description

TECHNICAL FIELD

[0001] The present application relates to a piercing device. BACKGROUND

[0002] Conventionally, a piercing device such as that mentioned in Patent Document 1 is known.

[0003] The piercing device of Patent Document 1 is provided with a drill bit and an electric drill for rotating the drill bit. Also, the piercing device of Patent Document 1 is provided with a cooling liquid supply attachment for supplying cooling liquid to the cutting edge of the drill bit, which is provided between the drill bit and the electric drill, and a cooling liquid tank for storing the cooling liquid. The cooling liquid stored in the cooling liquid tank is pressurized by a pump provided in the cooling liquid tank and supplied to the cooling liquid supply attachment via a supply flow path.

[0004] Prior Art Documents:

[0005] Patent Documents:

[0006] Patent Document 1: Japanese Patent Application Publication No. 2007-313855 SUMMARY

[0007] Problems to be Solved by the Invention:

[0008] However, in the piercing device of Patent Document 1, since the pump for pressurizing the cooling liquid to the cutting edge is provided in the cooling liquid tank, there is a problem in that the device structure becomes complicated.

[0009] Therefore, an object of the present application is to provide a piercing device that can pressurize cooling liquid to a cutting edge with a simple device structure.

[0010] Means for Solving the Problems:

[0011] To solve the foregoing problems, a piercing device according to the present application is characterized by being provided with a cutting edge, a drive device for rotationally driving the cutting edge, a supply flow path for supplying cooling liquid to the cutting edge, and a tube pump for pressurizing the cooling liquid in the supply flow path to the cutting edge, the tube pump having a supply tube configured as a part of the supply flow path and a first pressing mechanism for pressing the supply tube, the first pressing mechanism being driven by the drive device.

[0012] According to the above-described structure, since the tube pump is driven by the drive device for rotationally driving the cutting edge, the cooling liquid can be pressurized to the cutting edge with a simple device structure.

[0013] Effects of the Invention:

[0014] According to the present application, a piercing device that can pressurize cooling liquid to a cutting edge with a simple device structure can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram showing the overall structure of a piercing device according to the first embodiment of the present application;

[0016] Figure 2 is an appearance perspective view when a pump unit provided in the piercing device according to the first embodiment of the present application is viewed from the drive device side;

[0017] Figure 3 is an appearance perspective view showing a sample in the assembly of a planetary gear mechanism closest to the drive device side, provided in the piercing device according to the first embodiment of the present application;

[0018] Figure 4 is an appearance perspective view showing a sample in which a carrier is mounted on the planetary gear mechanism closest to the drive device side, provided in the piercing device according to the first embodiment of the present application;

[0019] Figure 5 is an appearance perspective view showing a sample in which a pressing portion is mounted on each of a plurality of planetary gears provided in the planetary gear mechanism closest to the cutting edge side, provided in the piercing device according to the first embodiment of the present application;

[0020] Figure 6 is an appearance perspective view showing a sample in which a third circular plate and a supply pipe are mounted on the planetary gear mechanism closest to the cutting edge side, provided in the piercing device according to the first embodiment of the present application;

[0021] Figure 7 is an appearance perspective view when a pump unit provided in the piercing device according to the first embodiment of the present application is viewed from the cutting edge side;

[0022] Figure 8 is a schematic diagram showing the overall structure of a piercing device according to the second embodiment of the present application;

[0023] Figure 9 is a schematic diagram showing the overall structure of a piercing device according to the third embodiment of the present application;

[0024] Figure 10 is a schematic diagram showing the overall structure of a piercing device according to the fourth embodiment of the present application;

[0025] Figure 11 is a sectional view when a cooling liquid supply mechanism and its peripheral portion provided in the piercing device according to the fourth embodiment of the present application are cut in the length direction at the center in the width direction;

[0026] Figure 12This is a schematic diagram showing the shielding portion of the perforating device according to the fourth embodiment of the present invention, wherein (A) is a schematic diagram viewed from the base end side of the drill bit, and (B) is a cross-sectional view when the center of the width direction is cut along the length direction.

[0027] Figure 13 This is a schematic diagram showing the force-applying mechanism of the perforating device according to the fourth embodiment of the present invention;

[0028] Figure 14 This is a cross-sectional view of the coolant supply mechanism and its surrounding portion of the piercing device according to the fourth embodiment of the present invention, cut along the length direction from the center in the width direction, wherein (A) is a cross-sectional view before the piercing operation and when the supply flow path is closed, and (B) is a cross-sectional view during the piercing operation and when the supply flow path is open. Detailed Implementation

[0029] Hereinafter, a perforation device according to an embodiment of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited by this embodiment. Furthermore, in all the following drawings, the same or equivalent elements are labeled with the same reference numerals, and repeated descriptions thereof are omitted.

[0030] (First Implementation)

[0031] Figure 1 This is a schematic diagram showing the overall structure of the perforation device according to this embodiment. Figure 1 As shown, the drilling apparatus 10A according to this embodiment includes: an electric drill 11, a pump unit 20 mounted on the electric drill 11, and a drill bit 90 mounted on the electric drill 11 via the pump unit 20. Furthermore, the drilling apparatus 10A also includes a supply flow path 88 for supplying coolant L to the cutting edge 98 of the drill bit 90.

[0032] In this embodiment, the drill bit 90 is driven to rotate by the electric drill 11. The cutting edge 98 of the rotating drill bit 90 presses against the material to be pierced (not shown), such as concrete or stone, to perform a piercing operation. Furthermore, during this piercing operation, to suppress heat generation of the drill bit 90 and the material being pierced, the coolant L in the supply flow path 88 is pumped to the cutting edge 98 of the drill bit 90 by the pump unit 20.

[0033] The drill bit 90 is hollow. Coolant L flows inside the drill bit 90, supplying coolant L to the cutting edge 98 of the drill bit 90. The coolant L supplied to the cutting edge 98 of the drill bit 90 exits from the cutting edge 98, suppressing heat generation in the drill bit 90 and the workpiece being drilled. Then, the coolant L mixes with the cuttings from the workpiece to form a suspension, which is discharged to the outside.

[0034] Further, a coolant tank (not shown) for storing the coolant L can be provided at the base end of the supply flow path 88. Also, the coolant L is usually water, but can be another liquid having a lower viscosity, for example. In addition, when the perforated object is a steel plate, for example, a lower-viscosity oil can be used as the coolant L.

[0035] (Electric drill 11)

[0036] The electric drill 11 has a housing 12, a drive device 13 housed in the housing 12 and configured to rotationally drive a drill bit 90, and a first holding mechanism 18 provided outside the housing 12 and configured to hold a shank 22 protruding from a base end surface of a pump unit 20.

[0037] The drive device 13 has an electric motor 14, and a motor reduction mechanism 16 provided on a drive shaft 15 of the electric motor 14 and configured to transmit a driving force of the electric motor 14 to the shank 22 after reducing a rotational speed of the driving force.

[0038] (Pump unit 20)

[0039] Figure 2 is an appearance perspective view of the pump unit provided in the perforating device of the present embodiment, as viewed from the drive device side. As shown in Figure 2 The pump unit 20 has a tube pump 60 configured to press-feed the coolant L in the supply flow path 88 toward a tip 98 of the drill bit 90, and a reduction mechanism 30 provided between the drive device 13 and the tube pump 60 (in other words, a first pressing mechanism 64 described later) and configured to transmit a driving force of the drive device 13 to the tube pump 60 (as above) after reducing a rotational speed of the driving force.

[0040] The pump unit 20 further has an input shaft 21 configured to input the driving force of the drive device 13 to the reduction mechanism 16. The input shaft 21 penetrates the pump unit 20 and extends from the drive device 13 toward the tip 98 side. The pump unit 20 is provided at a tip end of the input shaft 21 and further has a second holding mechanism 80 configured to hold a base end portion of the drill bit 90. The input shaft 21 is connected to the drill bit 90 via the second holding mechanism 80 and rotates integrally with the drill bit 90. Further, the base end portion of the input shaft 21 is the shank 22.

[0041] (Reduction mechanism 30)

[0042] The reduction mechanism 30 has two planetary gear mechanisms 31a, 31b arranged in parallel in the axial direction of the input shaft 21. The planetary gear mechanism 31a (the planetary gear mechanism closest to the drive device side, or one of the planetary gear mechanisms adjacent to each other on the drive device side) is provided on the drive device 13 side. Also, the planetary gear mechanism 31b (the planetary gear mechanism closest to the tip side, or the other of the planetary gear mechanisms adjacent to each other on the tip side) is provided on the drill bit 90 side.

[0043] Figure 3 is an appearance perspective view showing the planetary gear mechanism assembly of the perforating device according to the present embodiment. As shown in the drawing, the planetary gear mechanism 31a has a sun gear 34a arranged at the center of a first circular plate 32. The sun gear 34a is formed integrally with the outer surface of the input shaft 21. In other words, the sun gear 34a is fixed to the outer surface of the input shaft 21. As described above, the sun gear 34a rotates integrally with the input shaft 21 coaxially. Figure 3 The speed reduction mechanism 30 further has a first circular plate 32 in a circular plate shape. A through-hole 33 (see FIG. 6) for the input shaft 21 to pass through is provided at the center of the first circular plate 32. Figure 2 The end surface of the first circular plate 32 and the main surface of the first circular plate 32 on the side of the drive device 13 constitute a part of the outer shape of the pump unit 20.

[0044] The planetary gear mechanism 31a further has the sun gear 34a arranged at the center of the first circular plate 32, three planetary gears 36a circumscribed around the sun gear 34a so as to mesh with and rotate the sun gear 34a, and an internal gear 38a inscribed around the three planetary gears 36a so as to mesh with and rotate the three planetary gears 36a, respectively. The diameter of the internal gear 38a is the same as that of the first circular plate 32. Moreover, the end surface of the internal gear 38a constitutes a part of the outer shape of the pump unit 20.

[0045] The sun gear 34a protrudes from the outer surface of the input shaft 21 and is formed integrally with the outer surface of the input shaft 21. In other words, the sun gear 34a is fixed to the outer surface of the input shaft 21. As described above, the sun gear 34a rotates integrally with the input shaft 21 coaxially.

[0046] Figure 4 is an appearance perspective view showing the planetary gear mechanism assembly of the perforating device according to the present embodiment. As shown in the drawing, the planetary gear mechanism 31a has a sun gear 34a arranged at the center of a first circular plate 32. The sun gear 34a is formed integrally with the outer surface of the input shaft 21. In other words, the sun gear 34a is fixed to the outer surface of the input shaft 21. As described above, the sun gear 34a rotates integrally with the input shaft 21 coaxially. Figure 4 The speed reduction mechanism 30 further has a first circular plate 32 in a circular plate shape. A through-hole 33 (see FIG. 6) for the input shaft 21 to pass through is provided at the center of the first circular plate 32.

[0047] The planetary gear mechanism 31a further has the sun gear 34a arranged at the center of the first circular plate 32, three planetary gears 36a circumscribed around the sun gear 34a so as to mesh with and rotate the sun gear 34a, and an internal gear 38a inscribed around the three planetary gears 36a so as to mesh with and rotate the three planetary gears 36a, respectively. The diameter of the internal gear 38a is the same as that of the first circular plate 32. Moreover, the end surface of the internal gear 38a constitutes a part of the outer shape of the pump unit 20.

[0048] The sun gear 34b of the planetary gear mechanism 31b is formed integrally with the main surface of the planetary carrier 50 on the side of the tool tip 98. Thus, the planetary carrier 50 rotates integrally with the sun gear 34b.

[0049] Figure 5is an appearance perspective view showing a state in which the plurality of planetary gears of the planetary gear mechanism closest to the blade tip side of the perforating device of the present embodiment are provided with the plurality of pressing portions respectively. As shown in Figure 5 The speed reduction mechanism 30 further has a second circular plate 56 disposed on the blade tip 98 side of the carrier 50. The second circular plate 56 has a through-hole 58 for the input shaft 21 to pass through and for the sun gear 34b to pass through. The diameter of the second circular plate 56 is the same as the diameters of the first circular plate 32 and the inner gear 38a. Moreover, the end surface of the second circular plate 56 constitutes a part of the outer shape of the pump unit 20.

[0050] The planetary gear mechanism 31a further has: the sun gear 34b formed integrally with the carrier 50 as described above; three planetary gears 36b circumscribed around the sun gear 34b so as to mesh with and rotate with the sun gear 34b; and three inner gears 38b inscribed around the three planetary gears 36b so as to mesh with and rotate with the three planetary gears 36b respectively. The sun gear 34b has a shaft hole 35 (first shaft hole) for the input shaft 21 to pass through. This shaft hole 35 communicates with the shaft hole 54 of the carrier 50. The diameters of the inner gears 38b are the same as the diameters of the first circular plate 32, the second circular plate 56, and the inner gear 38a. Moreover, the end surface of the inner gears 38b constitutes a part of the outer shape of the pump unit 20.

[0051] (Tube pump 60)

[0052] Figure 6 is an appearance perspective view showing a state in which the third circular plate and the supply tube are mounted on the planetary gear mechanism closest to the blade tip side of the perforating device of the present embodiment. Also, Figure 7 is an appearance perspective view of the pump unit provided in the perforating device, as viewed from the blade tip side.

[0053] As shown in Figures 5 to 7 The tube pump 60 has: a supply tube 62 configured as a part of the supply flow path 88; and a first pressing mechanism 64 for pressing the supply tube 62.

[0054] As shown in Figure 5 , 6 The first pressing mechanism 64 has three rollers 66 (pressing portions) respectively provided on the three planetary gears 36b and rotating integrally with the three planetary gears 36b respectively. The three rollers 66 are coaxial with the three planetary gears 36b respectively, and are mounted to the respective rotation shafts 37b of the three planetary gears 36b.

[0055] As shown in Figure 6As shown, the first pressing mechanism 64 also has a third circular plate 67 disposed closer to the blade tip 98 than the three rollers 66. The third circular plate 67 has three fitting holes 68 that engage with the rotation shafts 37b of each of the three planetary gears 36b. Thus, the third circular plate 67 is connected to the three planetary gears 36b via the three rollers 66. The three fitting holes 68 are respectively located at equal intervals along the circumference of the third circular plate 67. Furthermore, the third circular plate 67 also has a through hole 69 for the input shaft 21 to pass through. The through hole 69 is located at the center of the third circular plate 67.

[0056] like Figure 7 As shown, the first pressing mechanism 64 also has a cover 70, which includes three rollers 66 connected to the supply pipe 62, thereby cooperating with the three rollers 66 to press the inner wall 72 of the supply pipe 62. The cover 70 is a hollow cylinder, coaxial with the input shaft 21. A through hole 73 for the input shaft 21 to pass through is provided at the center of the bottom surface on the blade tip 98 side of the cover 70. The bottom surface on the drive device 13 side of the cover 70 is open. The inner wall 72 is the inner wall of the side surface of the cover 70. The side surface of the cover 70 is provided with: an insertion hole 75 for the supply pipe 62 to be inserted into the cover 70 from the coolant tank side; and a removal hole 76 for removing the supply pipe 62 from the cover 70 towards the blade tip 98 side.

[0057] Furthermore, the diameter of the cover 70 is the same as the diameter of the first circular plate 32, the second circular plate 56, and the internal gears 38a and 38b. Moreover, the bottom surface of the cover 70 on the blade tip 98 side and the side surface of the cover 70 form part of the outer shape of the pump unit 20.

[0058] (Effect)

[0059] According to the above structure, in the piercing device 10A of this embodiment, the tubular pump 60 is used to drive the drive device 13 that drives the rotary drive tip 98, so coolant can be pumped to the tip 98 with a simple device structure.

[0060] Furthermore, the piercing apparatus 10A of this embodiment includes a deceleration mechanism 30, which allows the rotational speed of the first pressing mechanism 64 to be slower than that of the drill bit 90. As a result, for example, the drill bit 90 can be rotated at a sufficient rotational speed, while the coolant L in the supply flow path 88 is appropriately pressed to the cutting tip 98 of the drill bit 90, thus enabling efficient piercing operations.

[0061] Furthermore, in this embodiment, the sun gears 34a and 34b are coaxially arranged with the input shaft 21, which makes the perforation device 10A a simpler device structure.

[0062] Furthermore, in this embodiment, the tubular pump 60 is located outside the housing 12, making it easy to load and unload the tubular pump 60 from the drive unit 13 (in other words, the electric drill 11).

[0063] (Second Embodiment)

[0064] Based on Figure 8 A perforating device of the second embodiment of the present application will be described. Figure 8 is a schematic diagram showing the overall structure of the perforating device of the present embodiment. Also, the perforating device 10B of the present embodiment has the same structure as the perforating device 10A of the first embodiment described above, except for the arrangement position of the tube pump 60. Therefore, the same parts are designated by the same reference numerals, and the same description will not be repeated.

[0065] As Figure 8 shown in the figure, in the present embodiment, the tube pump 60 is arranged inside the housing 12. Specifically, the tube pump 60 is arranged between the driving device 13 arranged inside the housing 12 and the first gripping mechanism 18 arranged outside the housing 12.

[0066] In the present embodiment, the base end portion of the input shaft 21 of the tube pump 60 (i.e., the rod 22) is connected to the motor reduction mechanism 16 inside the housing 12. Thus, the motor reduction mechanism 16 reduces the rotational speed of the power of the electric motor 14 and transmits the power to the input shaft 21 of the pump unit 20.

[0067] Also, in the present embodiment, the rod 82 protrudes from the base end side of the second gripping mechanism 80. Also, the rod 82 is gripped by the first gripping mechanism 18 and connected to the tip end portion of the input shaft 21 inside the first gripping mechanism 18.

[0068] In the present embodiment, according to the above structure, the power of the electric motor 14 is transmitted to the drill bit 90. In the present embodiment, the tube pump 60 is accommodated inside the housing 12 and does not protrude outside, so that the failure of the tube pump 60 can be suppressed.

[0069] (Third Embodiment)

[0070] Based on Figure 9 A perforating device of the third embodiment of the present application will be described. Figure 9 is a schematic diagram showing the overall structure of the perforating device of the present embodiment. Also, the perforating device 10C of the present embodiment has the same structure as the perforating device 10B of the second embodiment described above, except for not having the motor reduction mechanism 16. Therefore, the same parts are designated by the same reference numerals, and the same description will not be repeated.

[0071] As Figure 9As shown, the perforation device 10C of this embodiment does not include a motor reduction mechanism 16, and the drive shaft 15 of the electric motor 14 is itself configured as the input shaft of the pump unit 20. This allows for weight reduction, for example. Furthermore, in this embodiment, the drive shaft 15 of the electric motor 14 and the input shaft of the pump unit 20 are independently provided, and the base end of the input shaft is directly mounted at the tip end of the drive shaft 15.

[0072] (Fourth Implementation)

[0073] based on Figures 10 to 14 The perforation device according to the fourth embodiment of the present invention will be described. Figure 10 This is a schematic diagram showing the overall structure of the perforation device according to this embodiment. Furthermore, the perforation device 10D of this embodiment has many of the same structures as the perforation device 10B of the second embodiment described above. Therefore, the same parts are labeled with the same reference numerals, and the same descriptions will not be repeated.

[0074] like Figure 10 As shown, the perforating device 10D of this embodiment also includes a discharge flow path 138 for discharging the suspension S from the blade tip 98. Furthermore, in this embodiment, the tubular pump 60' also includes a discharge pipe 112 that is configured as part of the discharge flow path 138 and a second pressing mechanism 114 for pressing the discharge pipe 112.

[0075] An insertion hole 75' is provided on the side of the cover 70, parallel to the insertion hole 75 of the supply tube 62, for inserting the discharge tube 112 from the blade tip 98 side into the cover 70. Also, a removal hole 76 is provided on the side of the cover 70, parallel to the insertion hole 75 of the supply tube 62. Figure 10 Not illustrated. See reference. Figure 7 A removal hole (not shown) is provided side by side for removing the discharge pipe 112 from inside the cover 70 toward the tank 150 side (described later). Additionally, the insertion hole 75' and the removal hole for the discharge pipe 112 are respectively located closer to the blade tip 98 than the insertion hole 75 and the removal hole 76 for the supply pipe 62, and are at the same height as the insertion hole 75 and the removal hole 76.

[0076] In this embodiment, a first pressing mechanism 64 for pressing the supply pipe 62 and a second pressing mechanism 114 for pressing the discharge pipe 112 constitute a single pressing mechanism 64 (114). Specifically, the pressing mechanism 64 (114) of this embodiment has a design based on... Figures 5 to 7 The first pressing mechanism 64 described herein has the same structure. Furthermore, the three rollers 66 (see reference) Figure 5 , 6 ) and the inner wall 72 of the cover 70 (refer to Figure 7) is pressed together with the supply pipe 62. Thereby, the pressing mechanism 64 (114) press-feeds the suspension liquid S in the discharge flow path 138 to the downstream side of the discharge flow path 138 in addition to press-feeding the coolant L in the supply flow path 88 to the cutting edge 98.

[0077] As shown in Figure 10 , the upstream end of the supply flow path 88 and the downstream end of the discharge flow path 139 are connected to a separation device 140 for separating the cutting chips C of the perforated object from the suspension liquid S to obtain the coolant L.

[0078] (Separation device 140)

[0079] The separation device 140 has a liquid container 141 and an inner container 142 inside the liquid container 141. Also, the separation device 140 has a float 146 floating in the suspension liquid S stored in the inner container 142 and a strainer 147 capable of moving integrally with the float 146 in the suspension liquid S for separating the cutting chips C from the suspension liquid S.

[0080] When the suspension liquid S is discharged from the downstream end of the discharge flow path 138 into the inner container 142, the cutting chips C and the like settle due to gravity. Also, the suspension liquid S further removes the cutting chips C (cutting chips C that cannot pass between the sliding member 167 and the rotating portion 161 to be described later and also cannot pass between the inclined surface 167a and the sealing member 165 to be described later) near the liquid surface. Thereby, the coolant L from which the cutting chips C are separated from the suspension liquid S can be supplied to the upstream end of the supply flow path 88 connected to the strainer 147.

[0081] As shown in Figure 10 , the perforating device 10D of the present embodiment further has a coolant supply mechanism 160 disposed closer to the cutting edge 98 side than the housing 12 and the first gripping mechanism 18 and a shield portion 200 covering the perforated portion Wa of the perforated object W perforated by the cutting edge 98 of the drill bit 90. The shield portion 200 is urged in the forward direction by a force applying mechanism 170 to be described later.

[0082] Figure 11 is a cross-sectional view when the coolant supply mechanism and the surrounding portion thereof of the perforating device of the present embodiment are cut in the length direction at the center in the width direction. As shown in Figure 11As shown, the cooling liquid supply mechanism 160 has a rotation portion 161 having a shaft 82 held by the first holding mechanism 18 of the electric drill 11, and a cooling liquid supply portion 163 provided around the rotation portion 161. The cooling liquid supply portion 163 can be held in a non-rotating state by a bearing 164 provided between the rotation portion 161. The cooling liquid supply portion 163 is connected to the supply flow path 88. A supply flow path 163a provided inside the cooling liquid supply portion 163 communicates with a supply flow path 161a provided in the rotation portion 161.

[0083] A drill bit mounting portion 166 that holds the base portion of the drill bit 90 is provided in the front portion of the rotation portion 161. The drill bit mounting portion 166 inserts and holds the base portion of the drill bit 90. The mechanism that holds the base portion of the drill bit 90 is omitted from the drawing. The mechanism that holds the base portion of the drill bit 90 can use a known technique.

[0084] The inside of the rotation portion 161 is provided with a sliding member 167 that can slide a predetermined amount in the front-rear direction (in other words, the length direction of the drill bit 90) in a state of abutting against the base portion of the drill bit 90. The sliding member 167 is urged in the front direction by a biasing member 168 (spring) provided in the inside of the rotation portion 161. The rear portion of the sliding member 167 is provided with a tapered surface 167a that expands in diameter, and the tapered surface 167a abuts against a seal member 165 provided at a predetermined position of the rotation portion 161 by the urging force of the biasing member 168. The front portion of the sliding member 167 is sealed by a seal member 169 provided between the drill bit mounting portion 166. The seal members 165, 169 can be O-rings. The sliding member 167 can slide in the rear direction against the urging force of the biasing member 168 within a predetermined amount of clearance A between the sliding member 167 and the rotation portion 161.

[0085] The space 161b between the sliding member 167 and the rotation portion 161 communicates with the cooling liquid supply hole 92 provided in the drill bit 90 via a supply flow path 167b provided in the sliding member 167. The cooling liquid supply hole 92 is provided from the base portion of the drill bit 90 to the tip 98.

[0086] As shown, in a state where the sliding member 167 is urged in the front direction by the biasing member 168, the tapered surface 167a abuts against the seal member 165, and the supply flow path 161a and the space 161b become a closed state. In this state, the cooling liquid L supplied from the supply flow path 88 to the cooling liquid supply portion 163 does not flow from the supply flow path 161a to the space 161b.

[0087] On the other hand, when the sliding member 167 is pressed from the direction of the drill bit 90 (the pressing operation of the drill bit 90 will be described later), the tapered surface 167a of the sliding member 167 is separated from the seal member 165, and the supply flow path 161a and the space 161b become an open state. Figure 14In this state, the sliding member 167 moves rearward within a prescribed amount of clearance A against the application of force by the force applying member 168. In this state, the inclined surface 167a is separated from the sealing member 165, and the supply flow path 161a and the space 161b are in communication, and the coolant L supplied from the supply flow path 88 flows from the supply flow path 161a to the space 161b.

[0088] Therefore, in the state where the drill bit 90 is installed in the drill bit installation portion 166, the coolant L supplied to the coolant supply mechanism 160 is stopped, and by pressing the drill bit 90 rearward, the coolant L supplied to the coolant supply mechanism 160 is supplied from the coolant supply hole 92 of the drill bit 90 to the perforated portion Wa from the cutting edge 98.

[0089] In other words, the perforating device 10D of the present embodiment further includes a sliding member 167 installed at the base end of the drill bit 90 and capable of sliding together with the drill bit 90 in the length direction of the drill bit 90, and a force applying member 168 for applying force to the drill bit 90 and the sliding member 167 from the base end side of the drill bit 90 toward the cutting edge 98 side. Furthermore, the sliding member 167 is configured to close the supply flow path 88 when located at the cutting edge 98 side by the application of force by the force applying member 168, and open the supply flow path 88 when sliding toward the base end side against the application of force by the force applying member 168.

[0090] In the present embodiment, the prescribed amount of clearance A in which the sliding member 167 moves in the front-rear direction is smaller than the arrangement clearance B from the front surface of the shielding portion 200 to the cutting edge 98 of the drill bit 90 in the state where force is applied to the front side by the force applying mechanism 170 described later (refer to Figure 11 、 Figure 14 (B)). Thus, after the front surface of the shielding portion 200 comes into abutment with the perforated object W, and the arrangement clearance B is pressed to the extent of the prescribed amount of clearance A, the inclined surface 167a of the sliding member 167 is separated from the sealing member 165. Therefore, in the state where the sealing member 208 of the shielding portion 200 is pressed against the perforated object W, the coolant L is supplied from the cutting edge 98 (refer to Figure 14 (B)), and leakage of the coolant L from between the shielding portion 200 and the perforated object W is suppressed. The relationship between the prescribed amount of clearance A and the arrangement clearance B is one example, and is not limited to the present embodiment.

[0091] (shielding portion 200)

[0092] Figure 12 is a schematic diagram showing the shielding portion provided in the perforating device of the present embodiment, (A) is a schematic diagram as viewed from the base end side of the drill bit, and (B) is a cross-sectional view as viewed along the length direction at the center in the width direction. In the shielding portion 200 of the present embodiment, the main body portion 201 is formed to be longer in the lateral direction, and the both end portions are provided with the link portions 202. The link portions 202 are configured to beFigure 13 The main body 201 is connected to the sliding portion 175 of the force applying mechanism 170. The central portion of the main body 201 is provided with a guide member 203 that guides the front portion of the drill 90 in the front-rear direction. In the guide member 203, the central portion is provided with a guide portion 204 for the drill 90, and the front portion is provided with a space portion 205. A seal member 206 is provided between the guide member 203 and the main body 201 to prevent leakage of the suspension liquid S therebetween. The seal member 206 can be an O-ring.

[0093] Further, the front surface of the main body 201 is provided with a seal member 208 that contacts the perforated object W. The seal member 208 is provided so as to seal the periphery of the space portion 205 and the periphery of the perforated portion Wa. The seal member 208 can be a sponge material, a rubber material, or the like.

[0094] Further, the lower portion of the main body 201 is provided with a discharge hole 207 that leads from the space portion 205 to the outside. The discharge hole 207 is connected to the discharge flow path 138. The suspension liquid S in the space portion 205 is discharged from the discharge hole 207 to the discharge flow path 138.

[0095] (FORCE APPLYING MECHANISM 170)

[0096] Figure 13 is a schematic view showing a force applying mechanism provided in a perforating device according to a fourth embodiment of the present application. Figure 13 is a half sectional view. The force applying mechanism 170 according to the present embodiment has a main body 171 that is mounted on the cooling liquid supply mechanism 160 of the perforating device 10D. The main body 171 is fixed to the outer surface of the cooling liquid supply mechanism 160.

[0097] On the main body 171, two guide portions 173 that extend in the front-rear direction are provided at left and right positions of the cooling liquid supply mechanism 160, and a sliding portion 175 that slides in the front-rear direction along the guide portions 173 is provided. The guide portions 173 are inserted into hole portions of the main body 171, and the two portions at the left and right positions are fixed to the main body 171 by fixing bolts 172. The sliding portion 175 is urged in the front direction by a force applying spring 174 provided inside the guide portions 173. The sliding portion 175 is stopped from sliding in the front direction and is held at a predetermined position shown in the drawing by a holding portion 176 provided at the end portions of the guide portions 173. The sliding portion 175 can slide in the rear direction against the urging force of the force applying spring 174 from the state shown in the drawing.

[0098] The tip end of the sliding portion 175 is fixed to a shield portion 200. Thus, the shield portion 200 can move in the rear direction integrally with the sliding portion 175 against the urging force of the force applying spring 174.

[0099] (Example of perforating operation)

[0100] Figure 14is a sectional view when the cooling liquid supply mechanism and the vicinity thereof of the perforating device of the present embodiment are cut in the central part in the width direction along the length direction, (A) is a sectional view before the perforating operation and when the supply flow path is closed, and (B) is a sectional view when the perforating operation is performed and when the supply flow path is opened. Based on Figure 10 and Figure 14 , an example of performing the perforating operation on the object to be perforated W using the perforating device 10D and the separating device 140 is described.

[0101] First, as shown in Figure 10 , the perforating device 10D is connected to the separating device 140 via the supply flow path 88 and the discharge flow path 138. Then, the pump unit 20' and the drill bit 90 are operated by the driving device 13, and the tip 98 of the perforating device 10D is disposed at the perforated part Wa of the object to be perforated W. In this state, the tube pump 60' presses the supply tube 62, and the cooling liquid L is supplied from the liquid container 141 to the tip 98 of the drill bit 90. However, as shown in Figure 14 (A), the sliding member 167 of the cooling liquid supply mechanism 160 abuts against the sealing member 165 to close the front end of the supply flow path 161a, and thus the cooling liquid L is not supplied from the liquid container 141. The tube pump 60' presses the discharge tube 112 to be in a state of sucking air from the space part 205 (see Figure 12 (B)) of the shielding part 200 to the discharge flow path 138. In this state, the sealing member 208 of the shielding part 200 provided in the perforating device 10D abuts against the perforated part Wa of the object to be perforated W.

[0102] Then, as shown in Figure 14 (B), the drill bit 90 is rotated by operating the operation part 12a provided in the housing 12, and the tip 98 of the drill bit 90 is pressed against the object to be perforated W. Thus, the shielding part 200 is in a state of being pressed against the object to be perforated W by the biasing mechanism 170 with a proper force. Also, the tip 98 of the drill bit 90 is pressed against the object to be perforated W, and thus the base part of the drill bit 90 moves backward within the range of the prescribed gap A against the pressing force of the sliding member 167 against the biasing member 168.

[0103] Thus, the inclined surface 167a of the sliding member 167 is separated from the sealing member 165, and the supply flow path 163a of the cooling liquid supply part 163 communicates with the cooling liquid supply hole 92 of the drill bit 90 via the supply flow path 161a, the space 161b of the rotating part 161, and the supply flow path 167b of the sliding member 167. Therefore, when the tip 98 of the drill bit 90 perforates the object to be perforated W, the cooling liquid L supplied from the liquid container 141 to the cooling liquid supply mechanism 160 is supplied from the tip 98 of the drill bit 90 to the perforated part Wa. Then, the suspension liquid S in the space part 205 (see Figure 12 (B)) of the shielding part 200 is pressed by the pressing mechanism 64 (114) (seeFigure 10 ) is pressed to forcibly discharge the liquid container 141.

[0104] Thus, the drill bit 90 is rotated to press the cutting edge 98 against the front of the perforated object W, and the perforated portion Wa of the perforated object W is perforated by the cutting edge 98. At this time, the supply pipe 62 is pressed by the pressing mechanism 64 (114), and the coolant L of the liquid container 141 is forcibly supplied from the cutting edge 98 of the perforating device 10D to the perforated portion Wa, and the discharge pipe 112 is pressed by the pressing mechanism 64 (114), and the suspension liquid S is forcibly discharged from the shield portion 200 to the liquid container 141.

[0105] Further, in the suspension liquid S discharged to the liquid container 141, the chips C and the like are settled by gravity, and the chips C are removed by the filter 147 floating in the vicinity of the liquid surface, and thus become the coolant L, which is again supplied to the cutting edge 98. That is, the coolant L supplied from the cutting edge 98 of the perforating device 10D to the drill bit 90 mounted on the perforating device 10D is obtained from the liquid surface and the vicinity thereof in which the chips C are small in the suspension liquid S stored in the liquid container 141 through the filter 147, and thus the coolant L in which the chips C are mixed is circulated to the cutting edge 98 of the perforating device 10D. Further, the coolant L is circulated by the tube pump 60', and thus the coolant L in which the chips C are mixed is appropriately circulated.

[0106] Therefore, according to the above-described perforating device 10D, the perforated object W can be appropriately perforated by the perforating device 10D while the circulation in which the backflow is appropriately suppressed by the appropriate supply of the coolant L to the cutting edge 98 and the forced discharge of the suspension liquid S is performed.

[0107] Further, according to the above-described perforating device 10D, the suspension liquid S is recovered from the shield portion 200 covering the perforated portion Wa and is forcibly discharged, and thus the coolant L can be appropriately circulated even in the downward perforation work. Therefore, the perforation work in various directions can be appropriately performed.

[0108] Further, in the present embodiment, a bogie for transporting the separation device 140 can be provided. Thus, the movement of the entire system can be easily performed. Even if a backpack or a shoulder bag is provided instead of the bogie, the movement of the entire system can be easily performed. Further, as shown in Figure 10 if the electric drill 11 is provided with the battery 19, the position of the perforation work can be easily changed while the perforation work can be appropriately performed even in a relatively narrow work site in a state in which the separation device 140 is loaded on the bogie. The electric drill 11 of the perforating device 10D is not limited to the structure in which the battery 19 is built in. The electric drill 11 can be the perforating devices 10A to 10C described above, and the like. Figure 1 、 8, 9) structure of power supply.

[0109] (Modified example)

[0110] Numerous modifications and other embodiments of the present application are set forth in accordance with the preceding description. Thus, the foregoing description is presented for purposes of illustration and discovery so as to enable others skilled in the art to employ the present application. The best mode for practicing the present application is thereby disclosed in this specification.

[0111] In the first to fourth embodiments described above, the reduction mechanism 30 is described as having two planetary gear mechanisms 31a, 31b arranged side by side in the axial direction of the input shaft 21. However, the reduction mechanism is not limited to this case, and may, for example, have three or more planetary gear mechanisms arranged side by side in the axial direction of the input shaft 21.

[0112] In this case, the three or more planetary gear mechanisms each have a sun gear, three planetary gears, and an internal gear, similarly to the planetary gear mechanisms 31a, 31b. Also, in this case, a carrier is provided between each of the planetary gear mechanisms adjacent to each other. Furthermore, the carrier is connected to the plurality of planetary gears provided in one of the planetary gear mechanisms adjacent to each other on the drive device side, and integrally rotates with the sun gear provided in the other of the planetary gear mechanisms adjacent to each other on the tip side.

[0113] In the first to fourth embodiments described above, the sun gears 34a are described as being formed integrally with the outer surface of the input shaft 21. However, the sun gear of the planetary gear mechanism closest to the drive device side among the plurality of planetary gear mechanisms may not be formed integrally with the outer surface of the input shaft. In this case, for example, the sun gear can have a shaft hole whose inner wall is fixed to the outer surface of the input shaft, so that the sun gear is fixed to the outer surface of the input shaft.

[0114] In the first to fourth embodiments described above, the planetary gear mechanism 31a is described as having three planetary gears 36a, and the planetary gear mechanism 31b is described as having three planetary gears 36b. However, the plurality of planetary gear mechanisms are not limited to this case, and may, for example, each have two planetary gears, or four or more planetary gears. Also, the plurality of planetary gear mechanisms can each have a different number of planetary gears from each other.

[0115] In the first to fourth embodiments described above, the sun gears 34a, 34b are described as being coaxial with the input shaft 21. However, the sun gears are not limited to this case, and may, for example, be appropriately increased in number.

[0116] In the first to fourth embodiments described above, the case where the carrier 50 has three fitting holes 52 (fitted portions) fitted to the respective rotation shafts 37a of the three planetary gears 36a is described. However, the carrier may, for example, have recesses as the fitted portions fitted to the respective rotation shafts of a plurality of planetary gears, without being limited to this case.

[0117] In the first to fourth embodiments described above, the case where the speed reduction mechanism 30 has two planetary gear mechanisms 31a, 31b arranged side by side in the axial direction of the input shaft 21 is described. However, the speed reduction mechanism may, for example, be configured as a harmonic drive (registered trademark) without being limited to this case.

[0118] In the case described above, the first pressing mechanism may, for example, have a rotation plate (or a rotation body) rotatably mounted in a plane orthogonal to the input shaft of the harmonic drive (registered trademark) and at least one pressing portion provided on the periphery of the rotation plate (same as above) on the input shaft of the harmonic drive (registered trademark). Further, the first pressing mechanism has a cover body including inner walls of the supply pipe (and the discharge pipe) pressed by the at least one pressing portion in cooperation with each other. According to such a structure, the tube pump can pressurize the coolant in the supply flow path toward the tool tip (and pressurize the suspension S in the discharge flow path toward the downstream side of the discharge flow path).

[0119] In the fourth embodiment described above, the case where the first pressing mechanism 64 for pressing the supply pipe 62 and the second pressing mechanism 114 for pressing the discharge pipe 112 are configured as one pressing mechanism 64 (114) and the supply pipe 62 and the discharge pipe 112 are pressed by the common three rollers 66 (see Figure 5 、 6 ) is described. However, the case where the first pressing mechanism and the second pressing mechanism are independently configured so that the discharge pipe is pressed by another pressing portion independently provided from the pressing portion for pressing the supply pipe may, for example, be the case.

[0120] (SUMMARY)

[0121] To solve the above-described problems, a perforating device according to an embodiment of the present application is characterized by including: a tool tip; a drive device for rotationally driving the tool tip; a supply flow path for supplying a coolant to the tool tip; and a tube pump for pressurizing the coolant in the supply flow path toward the tool tip, the tube pump having: a supply pipe configured as a part of the supply flow path; and a first pressing mechanism for pressing the supply pipe, the first pressing mechanism being driven by the drive device.

[0122] According to the above-described structure, the tube pump is driven by the drive device for rotationally driving the tool tip, so that the coolant can be pressurized toward the tool tip by a simple device structure.

[0123] Also, a reduction mechanism for transmitting the power of the driving device to the first pressing mechanism after the rotational speed of the power of the driving device is reduced can be provided between the driving device and the first pressing mechanism.

[0124] According to the above structure, the rotational speed of the tip can be made slower than that of the first pressing mechanism, and thus the perforating operation can be performed favorably.

[0125] For example, an input shaft for inputting the power of the driving device to the reduction mechanism can be provided; the input shaft extends from the driving device to the tip side while passing through at least the reduction mechanism; the reduction mechanism has a plurality of planetary gear mechanisms arranged side by side in the axial direction of the input shaft, and a carrier for connecting the planetary gear mechanisms adjacent to each other among the plurality of planetary gear mechanisms to each other; the plurality of planetary gear mechanisms each has a sun gear, a plurality of planetary gears circumscribed around the sun gear so as to rotate in mesh with the sun gear, and a ring gear inscribed around each of the plurality of planetary gears so as to rotate in mesh with the plurality of planetary gears, respectively; among the plurality of planetary gear mechanisms, the sun gear of the planetary gear mechanism closest to the driving device side rotates integrally with the input shaft, the carrier rotates integrally with the sun gear of the other of the planetary gear mechanisms adjacent to each other among the plurality of planetary gear mechanisms on the driving device side, and the first pressing mechanism has a plurality of pressing portions provided on the plurality of planetary gears of the planetary gear mechanism closest to the tip side among the plurality of planetary gear mechanisms so as to rotate integrally with the plurality of planetary gears, respectively, and a cover including inner walls of the supply tube pressed by the plurality of pressing portions in cooperation with the plurality of pressing portions, respectively.

[0126] Also, the sun gears of the plurality of planetary gear mechanisms can be arranged coaxially with the input shaft, the sun gear of the planetary gear mechanism closest to the driving device side among the plurality of planetary gear mechanisms can be fixed to the input shaft, and the sun gears of the planetary gear mechanisms other than the planetary gear mechanism closest to the driving device side among the plurality of planetary gear mechanisms can have first shaft holes for the input shaft to pass through.

[0127] According to the above structure, the perforating device can have a simpler device structure.

[0128] Also, the carrier can have a plurality of fitted portions fitted to the rotational shafts of the plurality of planetary gears of the one of the planetary gear mechanisms adjacent to each other among the plurality of planetary gear mechanisms on the driving device side, respectively, and a second shaft hole for the input shaft to pass through.

[0129] Also, for example, a housing for housing at least the driving device can be provided.

[0130] Also, the tube pump can be provided outside the housing.

[0131] According to the above structure, the tube pump becomes easy to attach and detach from the driving device.

[0132] Also, the tube pump can be housed in the housing.

[0133] According to the above structure, since the tube pump is not exposed to the outside, failure of the tube pump can be suppressed.

[0134] Also, the tip can be configured as a tip end of a drill bit, and the drill bit, a sliding member that is attached to a base end of the drill bit and is slidable in a length direction of the drill bit together with the drill bit, and an urging member for urging the drill bit and the sliding member from the base end side of the drill bit toward the tip side can be provided, and the sliding member can be configured to close the supply flow path when an urging force of the urging member is located on the tip side and to open the supply flow path when sliding toward the base end side against the urging force of the urging member.

[0135] According to the above structure, when a piercing operation is performed, the tip pushes the pierced object and the sliding member slides toward the base end side of the drill bit against the urging force of the urging member, and the supply flow path is opened. Therefore, the piercing operation can be performed more efficiently.

[0136] Also, a discharge flow path for discharging the suspension liquid from the tip can be provided, and the tube pump can have a discharge tube configured as a part of the discharge flow path, and a second pressing mechanism for pressing the discharge tube, and the second pressing mechanism can be driven by the driving device to pressurize the suspension liquid in the discharge flow path toward a downstream side of the discharge flow path.

[0137] According to the above structure, the suspension liquid can be forcibly discharged from the tip toward the downstream side of the discharge flow path, and therefore, for example, even when a pierced portion of the pierced object is located lower than a downstream end of the discharge flow path or when the piercing operation is performed with the tip facing downward, the suspension liquid can be reliably discharged toward the downstream side of the discharge flow path.

[0138] Also, the first and the second pressing mechanisms can be configured as one pressing mechanism that presses the supply tube and presses the discharge tube, and in addition to pressurizing the cooling liquid in the supply flow path toward the tip, the pressing mechanism can pressurize the suspension liquid in the discharge flow path toward the downstream side of the discharge flow path.

[0139] According to the above structure, the supply of the coolant to the tip and the discharge of the suspension from the tip can be performed efficiently with a simple mechanism.

[0140] The upstream end of the supply flow path and the downstream end of the discharge flow path can be connected to a separation device for obtaining the coolant by separating swarf of the perforated object from the suspension.

[0141] According to the above structure, the coolant can be circulated, so that the perforation work can be repeated even without preparing a new coolant.

[0142] Symbol explanation:

[0143] 10A to 10D perforation device

[0144] 11 electric drill

[0145] 12 housing

[0146] 13 drive device

[0147] 14 electric motor

[0148] 15 drive shaft

[0149] 16 motor reduction mechanism

[0150] 18 first gripping mechanism

[0151] 20 pump unit

[0152] 21 input shaft

[0153] 22, 82 rod

[0154] 30 reduction mechanism

[0155] 31a, 31b planetary gear mechanism

[0156] 32 first circular plate

[0157] 33, 58, 69, 73 through hole

[0158] 34a, 34b sun gear

[0159] 35, 54 shaft hole

[0160] 36a, 36b planetary gear

[0161] 37a, 37b rotation shaft

[0162] 38a, 38b internal gear

[0163] 50 carrier

[0164] 52, 68 fitting hole

[0165] 56 second circular plate

[0166] 60, 60' tube pump

[0167] 62 supply pipe

[0168] 64 first pressing mechanism

[0169] 66 roller (pressing portion)

[0170] 67 third circular plate

[0171] 70 lid

[0172] 72 inner wall

[0173] 75, 75' insertion hole

[0174] 76 extraction hole

[0175] 80 second gripping mechanism

[0176] 88 supply flow path

[0177] 90 drill bit

[0178] 92 coolant supply hole

[0179] 98 cutting edge

[0180] 112 discharge pipe

[0181] 114 second pressing mechanism

[0182] 138 discharge flow path

[0183] 140 separation device

[0184] 160 coolant supply mechanism

[0185] 167 sliding member

[0186] 168 force applying member

[0187] L coolant

[0188] S suspension

[0189] W perforated object

Claims

1. A perforating device, characterized in that, Possessing: a cutting tip; a driving device for rotationally driving the cutting tip; a supply flow path for supplying a coolant to the cutting tip; a tube pump for pressurizing the coolant in the supply flow path toward the cutting tip, the tube pump having a supply tube configured as a part of the supply flow path and a first pressing mechanism for pressing the supply tube, the first pressing mechanism being driven by the driving device; a reduction mechanism provided between the driving device and the first pressing mechanism for transmitting a driving force of the driving device to the first pressing mechanism after a rotational speed of the driving force is reduced; and an input shaft for inputting the driving force of the driving device to the reduction mechanism; the input shaft extending from the driving device toward the cutting tip at least through the reduction mechanism; the reduction mechanism having a plurality of planetary gear mechanisms juxtaposed in an axial direction of the input shaft and a carrier for connecting planetary gear mechanisms adjacent to each other among the plurality of planetary gear mechanisms to each other; the plurality of planetary gear mechanisms each having a sun gear, a plurality of planetary gears circumscribed to the sun gear so as to rotate in mesh with the sun gear, and a ring gear inscribed to the plurality of planetary gears so as to rotate in mesh with the plurality of planetary gears, respectively; among the plurality of planetary gear mechanisms, a planetary gear mechanism closest to the driving device side has the sun gear rotating integrally with the input shaft; the carrier rotates integrally with the sun gear of one of the planetary gear mechanisms adjacent to each other on the driving device side and the sun gear of the other of the planetary gear mechanisms adjacent to each other on the cutting tip side, in connection with the plurality of planetary gears of the one of the planetary gear mechanisms adjacent to each other on the driving device side; the first pressing mechanism has a plurality of pressing portions respectively provided on the plurality of planetary gears of a planetary gear mechanism closest to the cutting tip side among the plurality of planetary gear mechanisms so as to rotate integrally with the plurality of planetary gears, respectively; and a cover including inner walls of the plurality of pressing portions respectively inscribed to the supply tube so as to press the supply tube in cooperation with the plurality of pressing portions, respectively; wherein the sun gears of the plurality of planetary gear mechanisms are disposed coaxially with the input shaft, the sun gear of the planetary gear mechanism closest to the driving device side is fixed to the input shaft among the plurality of planetary gear mechanisms, and the sun gears of the planetary gear mechanisms other than the planetary gear mechanism closest to the driving device side among the plurality of planetary gear mechanisms have first shaft holes for the input shaft to pass through.

2. The perforating device according to claim 1, wherein the carrier has a plurality of fitted portions fitted to rotational shafts of the plurality of planetary gears of one of the planetary gear mechanisms adjacent to each other on the driving device side and a second shaft hole for the input shaft to pass through.

3. The perforating device according to claim 1, further comprising: a housing for accommodating at least the driving device.

4. The perforating device according to claim 3, wherein ​ The tube pump is provided outside the housing.

5. The perforating device according to claim 3, wherein The tube pump is housed in the housing.

6. The perforating device according to claim 1, wherein The tip is configured as a tip end of a drill bit, Further comprising: The drill bit; A sliding member installed to a base end of the drill bit and capable of sliding together with the drill bit in a length direction of the drill bit; And A force applying member for applying force to the drill bit and the sliding member from a base end side of the drill bit to the tip side; The sliding member is configured to close the supply flow path when the applied force of the force applying member is on the tip side and to open the supply flow path when sliding to the base end side against the applied force of the force applying member.

7. The perforating device according to any one of claims 1 to 6, wherein Further comprising a discharge flow path for discharging the suspension liquid from the tip; The tube pump further has a discharge tube configured as a part of the discharge flow path, and a second pressing mechanism for pressing the discharge tube; The second pressing mechanism is driven by the driving device to pressurize the suspension liquid in the discharge flow path to the downstream side of the discharge flow path.

8. The perforating device according to claim 7, wherein The first and the second pressing mechanisms are configured as one pressing mechanism, The pressing mechanism presses the supply tube and the discharge tube, and pressurizes the suspension liquid in the discharge flow path to the downstream side of the discharge flow path in addition to pressurizing the cooling liquid in the supply flow path to the tip.

9. The perforating device according to claim 8, wherein The upstream end of the supply flow path and the downstream end of the discharge flow path are connected to a separation device for separating a cutting chip of a perforated object from the suspension liquid to obtain the cooling liquid.

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