JP4533910B2 - Crushing and drilling equipment - Google Patents

Description

  The present invention relates to a crushing and drilling device used for crushing and removing work for underground buried piles or drilling work for pile buried holes.

  Conventionally, a crushing apparatus (for example, refer to Patent Document 1) that performs crushing and removing work for underground buried piles made of concrete, or a drilling apparatus that performs a drilling operation for pile-embedded holes (refer to Patent Documents 2 and 3). Has been proposed.

  The crushing device attaches a screw shaft to an auger supported suspended by a crane or the like, and attaches an auger head provided with a bit to the lower end of the screw shaft, and the screw shaft and the auger head are integrated by the auger. The ground pile is sequentially crushed from the upper end side by the auger head, and the crushed debris generated by the crushing is sequentially discharged to the ground side by spiral blades provided on the screw shaft. The buried pile is crushed and removed.

  The drilling device attaches a screw shaft to an auger suspended and supported by a crane or the like, and attaches a down hammer having a hammer head with a bit to the lower end of the screw shaft so as to be integrated with the screw shaft. The hammer head of the down hammer is rotated, and the hammering force of the down hammer is applied to the hammer head. The ground is drilled by the crushing action by the bit and the hammering force of the hammer head as the hammer head rotates. It is supposed to be.

JP 2001-3363 A Japanese Utility Model Publication No. 6-63694 Japanese Patent Application Laid-Open No. 2007-2485.

  By the way, the length of the concrete pile is set to a certain length due to restrictions on its production and transportation, etc.Therefore, when installing this as an underground pile for the purpose of securing ground strength, A single pile is not long enough, and usually multiple piles are joined sequentially. For this reason, steel plate end materials are embedded and fixed at both ends of the pile, and when joining multiple piles sequentially, the end material provided at the upper end of the lower pile and the upper The end face material provided at the lower end of the pile is integrally joined by welding to form a pile having a predetermined length.

  Therefore, when the pile embedded in the ground is crushed and removed by the crushing device, the crushing of the concrete molding portion in the middle of the pile can be easily crushed by the auger head, but at the joint portion between the piles However, there is a problem that crushing by the auger head is difficult due to the presence of the end face material, and it takes time for crushing work, and in some cases, crushing cannot be performed further.

  On the other hand, the above-mentioned drilling device is originally made for the purpose of drilling in the ground with a lot of rocks or rolling stones, that is, hard ground, and while further rotating the screw shaft and the hammerhead, Drilling is performed while giving a striking force.

  However, this method is effective in transmitting the striking force effectively on hard ground, but in the drilling of soft ground such as clay and gravel, the striking force of the down hammer is absorbed on the ground side. Since the drilling effect due to the hammering action is impaired, and the bid provided on the hammer head is configured to exhibit a high drilling action under the condition that it is rotated while applying a hammer, In the situation where the striking action does not work, there is a problem that a high drilling action cannot be expected and the resultant drilling ability becomes poor.

  Furthermore, since both of these conventional crushing devices and drilling devices are configured as dedicated machines, the crushing device is provided in spite of having common parts such as a screw shaft and functionally similar parts such as an auger head and a hammer head. There was also a problem that it could not be shared for work and drilling work.

  Therefore, the present invention provides a high crushing capacity in both the soft and hard parts of the pile in the crushing work of the underground pile, and a high drilling capacity in both the hard ground and the soft ground in the drilling work of the ground. In addition, the present invention has been made for the purpose of providing a crushing and drilling device that can be used for both crushing and drilling operations by simply replacing parts.

  In the present invention, the following configuration is adopted as a specific means for solving such a problem.

In the crushing and drilling device according to the first invention of the present application, the screw shaft 4 and the down hammer 5 are sequentially arranged coaxially on the lower end side of the auger 1 that is suspended and generates a rotational force, and the down hammer described above. The auger head 8 is constructed by attaching a spiral blade 82 on the outer peripheral surface of the support shaft 81 to the lower end of the shaft 5 and attaching an auger bit 83 to the lower end edge of the spiral blade 82 at a predetermined interval in the edge length direction. The first working mode is performed by rotating the screw shaft 4 and the auger head 8, and the impact force applied to the auger head 8 by the down hammer 5 while rotating the screw shaft 4 and the auger head 8. a second operational configuration performed by applying a selectably configured arbitrarily by the supply control of operating air to the down hammer 5 In addition, the outer peripheral side of the auger head 8 is configured by a cylindrical body 91 having a bit 92 at the lower peripheral edge thereof, and the axial center of the cylindrical body 91 of the peripheral wall of the cylindrical body 91 is sandwiched in the radial direction. Are provided with discharge ports 93 formed of cut openings cut from the upper end face toward the lower end face side so as to gradually reduce the width dimension, and are integrated with the screw shaft 4. The guide casing 9 fixed to the screw shaft 4 or the down hammer 5 side is arranged so as to rotate in the direction of the screw .

In the crushing and drilling device according to the second invention of the present application, in the crushing and drilling device according to the first invention , a protruding tip is formed on the distal end surface 83a of the auger bit 83 attached to the lower end of the auger head 8. 84 is provided.

In the crushing and drilling device according to the third invention of the present application, in the crushing and drilling device according to the first invention , the joint member 7 is provided with a drive sub 53 whose upper end side is provided on the lower end side of the down hammer 5. The auger head 8 is detachably attached to the lower end side of the auger head 8 while being detachably attached.

  In the present invention, the following effects can be obtained.

  (A) According to the crushing and drilling device according to the first invention of the present application, the screw shaft 4 and the down hammer 5 are successively arranged coaxially on the lower end side of the auger 1 that is suspended and generates a rotational force. In addition, a spiral blade 82 is attached to the lower end of the down hammer 5 on the outer peripheral surface of the support shaft 81, and an auger bit 83 is attached to the lower end edge of the spiral blade 82 at predetermined intervals in the edge length direction. The auger head 8 is attached and the screw shaft 4 and the auger head 8 are rotated to rotate the screw shaft 4 and the auger head 8 and the down hammer 5 is used to rotate the auger head 8. The second working mode performed by applying a striking force to the head 8 is arbitrarily selected by controlling the supply of operating air to the down hammer 5 In the drilling operation, when the drilling ground is soft ground, by selecting the first working mode, the drilling action associated with the rotation of the auger head 8 is used for cutting. The drilled soil generated by drilling is transported and discharged to the ground side by the screw shaft 4 so that an efficient drilling operation is realized. When the drilling ground is a hard ground with a lot of boulders, the down hammer is selected in addition to the drilling action associated with the rotation of the auger head 8 by selecting the second working mode. 5 is drilled by the cooperation of the striking force applied to the auger head 8, and the discharged soil generated by the drilling is conveyed and discharged to the ground side by the screw shaft 4. Realized.

Immediately Chi, the when cutting hole ground is soft soil the first operational configuration, in the case of hard soil is that the second working mode, respectively selected, also efficient cutting in any of the ground Drilling work is realized, for example, in drilling work on soft ground as in conventional drilling equipment, drilling efficiency is lower than drilling work on hard ground The work efficiency can be improved and the work cost can be reduced throughout the work.

  The selection of the first work mode and the second work mode is performed by selecting whether to operate the down hammer 5 or not. Specifically, the supply / supply stop of the working air to the down hammer 5 is performed. For example, even when the geology of the ground changes as the drilling operation progresses (that is, as the drilling depth increases), the change in the ground is possible. Accordingly, it is possible to quickly change the work mode in accordance with the drilling and drill the hole with the optimum work mode for the ground, thereby further enhancing the drilling work efficiency and reducing the work cost.

Further, on the outer peripheral side of the auger head 8, a cylindrical body 91 having a bit 92 at the lower end periphery is formed, and the axial center of the cylindrical body 91 of the peripheral wall of the cylindrical body 91 is sandwiched in the radial direction. At two opposing positions, there are provided discharge ports 93 formed by cut openings cut from the upper end face toward the lower end face side so that the width dimension gradually decreases, and are integrated with the screw shaft 4. Since the guide casing 9 fixed to the screw shaft 4 or the down hammer 5 side is disposed so as to rotate, it is suitable for use in crushing and removing work of underground buried piles. That is, some of the crushed debris generated in the guide casing 9 when the pile is crushed by the auger head 8 and the excavated soil generated in the excavation work of the guide casing 9 are directly from the inside of the guide casing 9. It moves to the screw shaft 4 side, and the other part is discharged from the inside of the guide casing 9 to the space portion outside the guide casing 9 through the discharge port 93, and from the space portion to the screw shaft 4 side. And both are discharged to the ground side by the screw shaft 4, so that crushed debris or excavated soil does not accumulate around the auger head 8 and the rotation operation of the auger head 8 is not hindered. This is because the piles are efficiently crushed.

  And, when used for crushing and removing work of underground buried piles in this way, for example, in the crushing work of the intermediate part of the pile, that is, the concrete molding part, by selecting the first work mode, Effective crushing is realized by the crushing action accompanying the rotation of the auger head 8. On the other hand, in the crushing work in the vicinity of the ends of the piles, the piles connected in the vertical direction are joined together by welding the end face members made of iron plate. However, in this case, the working mode is changed from the first working mode to the second working mode, the down hammer 5 is operated, and the striking force is changed to the above. By applying to the auger head 8, a striking force is applied to the crushing action by the rotation of the down hammer 5 through the down hammer 5, so that the end face material portion can be easily crushed and removed. In such a case, the operation mode is changed from the second operation mode to the first operation mode again.

  Thus, according to the crushing and drilling device of the present invention, the work mode is selected between the first work mode and the second work mode according to the site to be crushed, and the work is performed. It can efficiently crush and remove the whole pile (the whole pile that is connected to multiple piles to reduce the cost). For example, the pile can be crushed and removed like a conventional crushing device. Compared with the case where the crushing efficiency changes and in some cases crushing itself becomes difficult, the work efficiency throughout the crushing operation can be improved and the work cost can be reduced.

  The selection of the first work mode and the second work mode is performed by selecting whether to operate the down hammer 5 or not. Specifically, the supply / supply stop of the working air to the down hammer 5 is performed. For example, even if the hardness of the part to be crushed changes with the progress of the crushing work, the work form can be changed quickly according to the change, Crushing can be performed in a work mode that is optimal for the hardness of the part, and this further enhances the crushing work efficiency improvement and the work cost reduction effect.

Furthermore, since the crushing and drilling device can be diverted as a drilling work dedicated machine and a crushing work dedicated machine depending on whether or not the guide casing 9 is mounted on the outer peripheral side of the auger head 8, as in the prior art. In addition, it is not necessary to prepare a drilling device and a crushing device as dedicated machines, and the versatility of the crushing and drilling device is greatly improved, which is extremely economical.

(B) In the crushing and drilling device according to the second invention of the present application, in the crushing and drilling device according to the first invention , a protrusion is formed on the tip surface 83a of the auger bit 83 attached to the lower end of the auger head 8. Since the chip-shaped tip 84 is provided, the impact force applied to the auger head 8 can be concentrated on the rock or the end face material through the tip 84 to further promote the crushing action. The effect described in (a) is made even more remarkable.

(C) In the crushing and drilling device according to the third invention of the present application, in the crushing and drilling device according to the first invention , the upper end side of the joint material 7 is provided on the lower end side of the down hammer 5. Since the auger head 8 is detachably attached to the lower end side of the drive sub 53, the hammer head is mounted on the drive sub 53 provided on the lower end side of the down hammer 5. A conventional crushing device or hole drilling device is replaced with a hammer head by mounting the joint material 7 and an auger head 8 is attached to the joint material 7, which is used as a crushing hole drilling device according to the present invention. It can be used, and sharing of the device is promoted.

Hereinafter, the present invention will be specifically described based on preferred embodiments.
A: First Embodiment FIG. 1 shows a crushing and drilling device Z according to a first embodiment of the present invention. This crushing and drilling device Z is suitable for being mainly used for drilling work in the ground in a state suspended from the distal end side of the boom 20 of a crane truck X as a support device. As shown, the swivel joint 2, the rod 3, the screw shaft 4, the joint material 7, and the auger head 8 are sequentially coaxially arranged at the lower end of the auger 1 that is suspended from the tip of the boom 20 and generates a rotational driving force. It is configured by connecting.

  The auger 1 generates a rotational driving force, and the rotational driving force is transmitted to the screw shaft 4 and the auger head 8 through the rod 3.

  The swivel joint 2 is interposed between the auger 1 and the rod 3 to transmit the rotational driving force of the auger 1 to the rod 3 side, and on the outer peripheral side thereof to a non-rotating portion of the auger 1. The upper piece 2a is connected to the rod 3 and the lower piece 2b is non-rotatably connected to the rod 3 side. The upper fluid passage formed in the upper piece 2a and the lower fluid passage 15b formed in the lower piece 2b Regardless of the rotation of the rod 3 side, it is always in communication. The upper fluid passage 15a is connected to the high pressure unit 12 via the fluid supply hose 14, while a fluid outlet hose 16 is connected to the lower fluid passage 15b, and the crushing hole drilling device Z is in operation. The mixed fluid of water and pressurized air supplied from the high pressure unit 12 can be supplied to the vicinity of the auger head 8 through the fluid outlet hose 16. As shown in FIGS. 1 and 2, the fluid outlet hose 16 passes through the spiral blade 42 of the screw shaft 4 and the spiral blade 62 of the hammer cover 6 provided in the down hammer 5 as described below and is drawn downward. And opened near the auger head 8.

  Depending on the conditions such as the soil quality at the drilling site, a plant mixer may be installed in place of the high pressure unit 12, and cement milk from the plant mixer may be supplied to the auger head 8 via the fluid outlet hose 16. It can be fed to the vicinity to improve the soil quality of the drilled hole.

  The screw shaft 4 is configured by providing a spiral blade 42 over the entire length of the outer peripheral surface of the shaft body 41, rotates by receiving the rotational driving force of the auger 1, and conveys discharged soil or the like by the spiral blade 42. Drain.

  As shown in FIGS. 2 and 4, the down hammer 5 generates a required striking force by an air piston mechanism. The compressed air for driving the down hammer 5 is supplied from the compressor 11 to the auger 1 side via the air hose 13, and then the axial center portions of the swivel joint 2, the rod 3 and the screw shaft 4 from the auger 1. The downhammer 5 is driven / stopped by the supply / supply stop operation. Further, the drive sub 53 is provided with a spline hole 55 into which the spline tooth 75 in the joint material 7 described below is fitted, and a latching portion 56 is provided. Further, on the outer peripheral side of the down hammer 5, a hammer cover 6 configured by providing spiral blades 62 on the outer peripheral surface of the cylindrical body 61 is mounted (see FIG. 2). The auger 1 is integrally rotated by receiving the rotational driving force.

  The joint material 7 is configured by integrally forming a cylindrical portion 71 having a hexagonal hole-like fitting hole 73 and a shaft portion 72 having spline teeth 75 on the same axis. The fitting hole 73 is for fitting a fitting shaft 85 of the auger head 8 described below, and a pin receiving hole 74 is formed therethrough. Further, on the outer end side of the spline teeth 75, a latching portion 76 is formed which is latched on the latching portion 56 of the drive sub 53 to prevent the falling off.

  Therefore, the joint material 7 has the spline teeth 75 meshed with the spline hole 55 on the drive sub 53 side, and the latch portion 76 is latched on the latch portion 57 on the drive sub 53 side, and a nut. By tightening 58, it is attached in a state in which the rotational force can be transmitted and the downward drop is prevented, and is reciprocated in the vertical direction integrally with the drive sub 53.

  The auger head 8 is configured by mounting two spiral blades 82 on the outer peripheral surface of a short columnar support shaft 81 with a rotation phase of 180 °. A fitting shaft 85 on a hexagonal shaft is integrally formed at the upper end of the support shaft body 81, and a pin receiving groove 86 is provided on a side surface of the fitting shaft 85. A plurality of auger bits 83 are detachably attached to the lower edge of each spiral blade 82 at a predetermined interval in the edge length direction. Further, as shown in FIG. 5, a plurality of protruding tips 84 are formed at a predetermined interval on the distal end surface 83a of the auger bit 83. As shown in FIG. The number of chips 84 formed and the pitch are appropriately set according to the work target.

  The auger head 8 configured as described above can transmit a rotational force by fitting the fitting shaft 85 into the fitting hole 73 of the joint material 7 and is inserted into the pin receiving hole 74. Dropping is prevented by a pin (not shown).

  Here, a drilling operation performed using the crushing drilling apparatus Z will be described.

  The crushing hole drilling device Z is performed by rotating the auger head 8 and operating the down hammer 5 while rotating the auger head 8 and operating the down hammer 5. The second working mode can be selected, and this selection is easily performed by the operation of supplying / stopping supply of pressurized air to the down hammer 5. Accordingly, in any work mode, the screw shaft 4 and the auger head 8 are rotationally driven by the auger 1. In the first work mode, drilling is performed by the drilling action by the rotation of the auger head 8. In the second work mode, the drilling action by the rotation of the auger head 8 and the down hammer 5 are performed. Drilling is performed in cooperation with the drilling action by the striking force.

  Specifically, as shown in FIG. 1, the crushing hole drilling device Z is arranged in a vertically suspended state at a predetermined hole drilling position, the auger 1 is operated, and the screw shaft 4 and the auger head 8 are moved. Rotate. Here, if the upper ground at the beginning of digging is soft ground, the first working mode is selected, and drilling is performed by the drilling action by the rotation of the auger head 8.

  On the other hand, for example, when the ground changes from a soft ground to a hard ground as the drilling proceeds, the work mode is changed from the first work mode to the second work mode. Along with the change of the working mode, the striking force of the down hammer 5 is added to the rotation of the auger head 8, and the drilling of the rock or the boulder ground is performed by the cooperation of the drilling action by the rotation and the drilling action by the blow. Is performed efficiently. In this case, the crushing action of the tip 84 provided on the auger bit 83 of the auger head 8 also contributes to the promotion of drilling.

  The discharged soil generated by drilling is sequentially discharged to the ground side by the spiral blade 62 of the hammer cover 6 and the spiral blade 42 of the screw shaft 4.

  As described above, by appropriately changing the work mode between the first work mode and the second work mode in response to the change in the state of the drilled ground, it is possible to perform complete cutting regardless of the change in the ground state. A good working efficiency is realized through the drilling operation, and as a result, the drilling cost is reduced and the drilling time is shortened.

  During the drilling operation, the fluid (mixed fluid of high pressure air and water) from the high pressure unit 12 is ejected from the fluid outlet hose 16 to the vicinity of the auger head 8 so as to be discharged at the drilling portion. The clogging of the soil is suppressed and the drilling action is maintained well, and the drilling action is further promoted by the crushing action of the jet especially in drilling in soft ground.

Further, in another embodiment, when the drilled hole portion is a soil that is easily collapsed such as gravel, a plant mixer is disposed instead of the high pressure unit 12, and cement milk is supplied from the plant mixer. Further, by injecting through the fluid outlet hose 16 to the vicinity of the auger head 8, it is possible to perform the drilling operation while improving the soil quality in the drilled portion.
B: Second Embodiment FIG. 6 shows a crushing and drilling device Z according to a second embodiment of the present invention. This crushing and drilling device Z is suitable for being mainly used for crushing work of underground buried piles in a state where it is suspended from the tip side of the boom 20 of a crane truck X as a support device. As shown in FIG. 7, the swivel joint 2, the rod 3, the screw shaft 4, the joint material 7 and the auger head 8 are coaxially arranged at the lower end of the auger 1 suspended from the tip of the boom 20 and generating a rotational driving force. The basic configuration is the same as that of the crushing hole drilling device Z of the first embodiment, and the difference is that the guide described below is provided on the outer peripheral side of the auger head 8. The casing 9 is provided.

  That is, as shown in FIG. 7, the outer diameter of the spiral blade 62 of the hammer cover 6 is set larger than the outer diameter of the auger head 8 by a predetermined dimension. The guide casing 9 includes a cylindrical body 91 having an inner diameter that can be fitted to the outer periphery of the spiral blade 62 of the hammer cover 6. At two positions opposite to each other with the axial center of the cylindrical body 91 sandwiched in the radial direction, the cylindrical body 91 is formed with a cut opening cut from the upper end surface toward the lower end surface side so that the width dimension gradually decreases. A discharge port 93 is provided. A plurality of bits 92 are attached to the outer peripheral edge portion of the lower end of the cylindrical body 91 at predetermined intervals in the circumferential direction.

  The guide casing 9 having such a configuration is attached to the hammer cover 6 side by welding and fixing the inner peripheral surface of the upper end portion to the outer peripheral edge of the spiral blade 62 of the hammer cover 6. In a state where the guide casing 9 is attached to the hammer cover 6 side, the auger head 8 attached to the lower end side of the down hammer 5 via the joint material 7 is in the middle stage in the axial direction of the guide casing 9. It faces the middle part of the discharge port 93.

  Accordingly, the guide casing 9 is driven to rotate integrally with the screw shaft 4 and the hammer cover 6 and the auger head 8, while the joint material 7 and the auger head 8 are not fixed. Even under the operating state of the down hammer 5, the striking force of the down hammer 5 is not transmitted.

  On the other hand, after the fluid outlet hose 16 passes through the spiral blade 42 on the screw shaft 4 side and is pulled out to the lower surface side, the fluid outlet hose 16 passes through the peripheral wall of the guide casing 9 and is taken out to the outer peripheral surface side. The guide casing 9 extends to the lower end along the outer peripheral surface, and is opened downward.

  In addition, since the structure of each member other than this is the same as the thing in the said 1st Embodiment, the applicable description of this 1st Embodiment is used and description here is abbreviate | omitted.

  Here, the crushing and removing operation of the underground buried pile performed using the crushing and drilling device Z will be described.

  The crushing hole drilling device Z is performed by rotating the auger head 8 and operating the down hammer 5 while rotating the auger head 8 and operating the down hammer 5. The second working mode can be selected, and this selection is easily performed by the operation of supplying / stopping supply of pressurized air to the down hammer 5. Accordingly, in any work mode, the screw shaft 4, the auger head 8 and the guide casing 9 are rotationally driven by the auger 1. In the first work mode, the pile is crushed and removed by the crushing action by the rotation of the auger head 8. In the second work mode, the crushing action by the rotation of the auger head 8 and the down hammer 5 are removed. The pile is crushed and removed by the cooperation of the crushing action by the striking force.

  The guide casing 9 is rotated so that the bit 92 provided at the entire circumference of the lower end of the guide casing 9 excavates the soil around the pile and exposes the pile from the soil to crush the guide casing 9. Make it easy.

  Specifically, as shown in FIG. 6, the crushing hole drilling device Z is arranged in a vertically suspended state at a position where the buried pile exists, and the auger 1 is operated to operate the screw shaft 4 and the auger head 8. And the guide casing 9 is rotated. Here, when the part to be crushed of the pile is a part mainly made of concrete in the middle part of the pile, the first work mode is selected, and the surrounding of the pile by the rotation of the bit 92 of the guide casing 9 is selected. The pile is crushed and removed by the cooperation of the soil excavation action and the pile crushing action by the rotation of the auger head 8.

  On the other hand, with the progress of the pile crushing operation, when the crushing target part reaches the vicinity of the connection portion between the piles connected in the vertical direction, the work form is changed from the first work form to the second work form. Change to work mode. Along with the change of the working mode, the impact force of the down hammer 5 is added to the rotation of the auger head 8, and the concrete portion of the pile is of course due to the cooperation of the crushing action by rotation and the crushing action by impact. The steel plate end face material provided at the connecting portion of the pile is also efficiently removed again. In this case, of course, the crushing action of the tip 84 provided on the auger bit 83 of the auger head 8 also contributes to the promotion of drilling.

  In addition, some of the crushed debris generated by crushing the pile and the excavated soil generated by the excavation work of the guide casing 9 move directly from the inside of the guide casing 9 to the screw shaft 4 side. The portion is discharged from the inside of the guide casing 9 to the space portion outside the guide casing 9 through the discharge port 93, moves from the space portion to the screw shaft 4 side, and both are moved to the ground side by the screw shaft 4. Therefore, the piles can be efficiently crushed without crushing debris or excavated soil accumulating around the auger head 8 and hindering the rotation of the auger head 8.

  Thus, according to the crushing hole drilling device Z of the present invention, by selecting the work mode between the first work mode and the second work mode according to the crushing target portion of the pile, The whole pile (the whole pile that is connected to a plurality of piles to reduce the cost) can be efficiently crushed and removed, for example, depending on the part to be crushed like a conventional crushing device. Compared with the case where the crushing efficiency changes and in some cases crushing itself becomes difficult, the work efficiency throughout the crushing operation can be improved and the work cost can be reduced.

  The selection of the first work mode and the second work mode is performed by selecting whether to operate the down hammer 5 or not. Specifically, the supply / supply stop of the working air to the down hammer 5 is performed. For example, even if the hardness of the part to be crushed changes with the progress of the crushing work, the work form can be changed quickly according to the change, Crushing can be performed in a work mode that is optimal for the hardness of the part, and this further enhances the crushing work efficiency improvement and the work cost reduction effect.

  During the crushing and removing operation, the fluid (mixed fluid of high pressure air and water) from the high pressure unit 12 is jetted from the water outlet hose 16 to the vicinity of the respective bits 92 of the guide casing 9, thereby The clogging of the discharged soil at the excavated portion by the bit 92 is suppressed, and the pile crushing and removing action by the auger head 8 is favorably maintained.

In another embodiment, when the soil around the buried pile is a soil that is easily collapsed such as gravel, a plant mixer is disposed instead of the high pressure unit 12, and the plant mixer By crushing cement milk through the fluid lead-out hose 16 to the vicinity of each bit 92 of the guide casing 9, the crushing and removing operation can be performed while improving the soil quality in the crushing operation portion.
C: Others In the first embodiment, the crushing and drilling device Z is used as a dedicated drilling machine, and in the second embodiment, the crushing and drilling device Z is used as a dedicated crushing machine. However, the structural difference between these two dedicated machines is whether or not the guide casing 9 is mounted on the outer peripheral side of the auger head 8 or not. Accordingly, two types of the hammer cover 6 are prepared, one in which the guide casing 9 is not attached to the hammer cover 6 and the other in which the guide casing 9 is attached to the hammer cover 6. By selecting and using according to the above, the crushing and drilling device Z can be diverted as a dedicated machine for drilling work and a dedicated machine for crushing work. There is no need to prepare, and the versatility of the crushing and drilling device Z is greatly improved, which is extremely economical.

1 is an overall side view of a crushing and drilling device according to a first embodiment of the present invention. It is an enlarged view of the II section of FIG. It is an enlarged view of the III section of FIG. It is an exploded view of a hammer head and an auger head part. FIG. 3 is an enlarged perspective view of the augerbit shown in FIG. 2. It is a whole side view of the drilling apparatus which concerns on 2nd Embodiment of this invention. It is an enlarged view of the VII part of FIG.

1 ·· Auger 2 ·· Swivel joint 3 · · Rod 4 · · Screw shaft 5 · · Down hammer 6 · · Hammer cover 7 · · Joint material 8 · · Auger head 9 · · Guide casing 11 · · Compressor 12 · · High pressure unit (plant mixer)
13 ·· Air hose 14 · · Fluid supply hose 15 · · Fluid passage 16 · · Fluid outlet hose 17 · · Air passage 20 · · Boom 41 · · Shaft body 42 · · Spiral blade 51 · · Cylinder 53 · · Drive sub 55 ..Spline hole 61 ..Cylinder body 62 ..Spiral blade 71 ..Cylinder part 72 ..Shaft part 73 ..Fitting hole 74 ..Pin receiving hole 75 ..Spline tooth 81 ..Support shaft body 82 .. Spiral blade 83 ·· Orbit 84 ·· Tip 85 ·· Fit shaft 86 ·· Pin receiving groove 91 ·· Cylinder 92 ·· Bit 93 ·· Opening X ·· Crane wheel Z ·· Fracture drilling device

Claims (3)

A screw shaft (4) and a down hammer (5) are successively arranged coaxially on the lower end side of the auger (1) that is supported by suspension and generates rotational force, and at the lower end of the down hammer (5). An auger configured by attaching a spiral blade (82) on the outer peripheral surface of the shaft body (81) and attaching an auger bit (83) to the lower end edge of the spiral blade (82) at predetermined intervals in the edge length direction. Install the head (8)
A first mode of operation performed by rotating the screw shaft (4) and the auger head (8), and rotating the screw shaft (4) and the auger head (8) and by the down hammer (5). a second operational configuration performed by applying a striking force to the auger head (8), Rutotomoni be selectable configured arbitrarily by the supply control of operating air to the down hammer (5),
On the outer peripheral side of the auger head (8), a cylindrical body (91) provided with a bit (92) at the lower peripheral edge of the auger head (8) and the axis of the cylindrical body (91) on the peripheral wall of the cylindrical body (91) Discharge ports (93) each having a cut-out opening cut from the upper end surface toward the lower end surface side so as to gradually reduce the width dimension are provided at two positions opposite to each other across the radial direction of the core. And a guide casing (9) fixed to the screw shaft (4) or the down hammer (5) side so as to rotate integrally with the screw shaft (4). Drilling device. In claim 1,
A crushing hole drilling device characterized in that a protruding tip (84) is provided on a tip surface (83a) of the auger bit (83) attached to the lower end of the auger head (8). In claim 1,
The joint material (7) is detachably attached to a drive sub (53) provided on the lower end side of the down hammer (5), while the auger head (8) is attached to the lower end side of the joint material (7). A crushing and drilling device characterized by being configured to be freely attached.

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