JP2021175874A - Driving device, driving machine and driving method - Google Patents

Abstract

To provide a driving device, a driving machine and a driving method, which can drive a driven object by sufficient striking force, and can suppress breakage of a suspending machine due to resonance during operation.SOLUTION: A driving machine 1 comprises a driving device 2 and a truck crane 3 suspending the same. The driving device 2 comprises: a cylinder provided with a fitted inserted part; a hammer part 21 that is placed therein, reciprocates along a cylinder axial direction by compressed air, and includes a striking piston in which a stroke of the reciprocation is set to a length strikable only in a fitted inserted part direction; a movable joint part 23 that is fitted and inserted by the fitted inserted part, is struck with the striking piston, and moves forward and backward in the axial direction of the hammer part 21 with a predefined stroke; a spacer part 24 that is mounted to the movable joint part 23 and includes a cylindrical trunk 241 with a predefined length; and a chuck part 25 that is mounted to the spacer part 24 and can transmit the striking force from the striking piston through the movable joint part 23 and the spacer part 24 relative to a clamped driven object A.SELECTED DRAWING: Figure 1

Description

The present invention relates to a driving device, a driving machine and a driving method. More specifically, it is possible to place steel sheet piles, H steel, etc. (hereinafter referred to as "objects to be driven") with sufficient striking force, and to suspend the driving device due to resonance during work. The present invention relates to a driving device, a driving machine, and a driving method capable of suppressing damage to a construction machine such as a crane (hereinafter referred to as a "hanging machine").

Conventionally, vibration and noise generated during work involving the placement of an object to be placed have been a problem, especially in construction work in urban areas, and a device for solving this problem is described in Non-Patent Document 1 below. The proposed vibro hammer has been proposed (shown as vibro hammer 9 in FIG. 6 (a)).

The vibro hammer 9 has a motor 91 and a rotor 92 having a pair of eccentric weights rotated by the motor 91 on the left and right sides, and the rotors 92 are rotated in the opposite directions in the horizontal direction. It is a device configured to offset the centrifugal force generated in the above, generate only the force in the vertical direction in the same cycle as the rotation speed, and drive the object A to be driven while vibrating it up and down by the reciprocating motion in the vertical direction. be.

Civil Engineering Course Beyond Level 2 Civil Engineering Pass Part 1 Civil Engineering General Chapter 3 Foundation Construction Section 3 Ready-made Pile Foundation (1) Construction of Ready-made Pile Foundation (1) Driving Method v) Vibrohammer Method (Vibration Method) Internet <URL: http://www.mizunotec.co.jp/doboku/doboku_kouza/doboku_kouza_14.html ＞

By the way, as shown in FIG. 6B, the vibro hammer 9 is often used by being suspended by the crane vehicle 93, and each part of the crane vehicle 93 used in such an embodiment (for example, a boom, etc.) Damage accidents (dampers supporting the boom, electronic parts of instruments, etc.) are occurring frequently.

In this accident, the vertical vibration (particularly large at start-up or stop) caused by the structure of the vibro hammer 9 is transmitted to the crane car 93 via the hook and the wire, and is damaged due to the resonance generated in the crane car 93. It is believed that an accident occurred. For this reason, even if a construction company applies for rental of a crane car to a rental company, there are cases where the rental is refused when it becomes clear that the purpose of the crane car is to suspend a vibro hammer.

Many construction companies procure construction machinery such as crane trucks from rental companies, and Vibrohammer was a useful equipment for suppressing noise and vibration during pile driving work in construction work in urban areas. Therefore, it is a serious problem that the construction method combining the vibro hammer 9 and the crane wheel 93 cannot be implemented. On the other hand, since the vibro hammer 9 drives the attached object A while vibrating instead of striking it, it is not suitable for the work of driving the object A deep into the soil.

The present invention has been devised in view of the above points, and it is possible to drive an object to be driven with a sufficient striking force, and it is possible to suppress damage to the suspension machine due to resonance during work. It is an object of the present invention to provide a driving device, a driving machine and a driving method which can be performed.

In order to achieve the above object, the driving device of the present invention has a cylinder having a fitting insertion portion at the tip and a striking piston which is arranged in the cylinder and reciprocates in the axial direction of the cylinder by compressed air. The stroke of the striking piston that is in a reciprocating state is fitted into the hammer portion and the fitted insertion portion having a structure in which the striking piston is set to a length that allows striking only in the direction of the fitting insertion portion, and is striked by the striking piston. At the same time, a movable joint portion that can move forward and backward in the axial direction of the hammer portion with a predetermined stroke, and a movable joint portion that is attached to the movable joint portion and can pinch the object to be driven, and the movable joint portion with respect to the pinched object to be driven. It is provided with a chuck portion capable of transmitting a striking force through the cylinder.

Here, the hammer portion of the present invention has a structure in which the striking piston reciprocates in the cylinder in the axial direction, so that the striking force can be transmitted to the fitted movable joint portion. Then, in the driving device of the present invention, the movable joint portion and the chuck portion are attached, and the casting target sandwiched between the chuck portions can be driven. That is, the driving device of the present invention can drive an object to be driven with a striking force from the hammer portion.

Further, the driving device of the present invention has a structure in which the driving target is driven by the striking force from the hammer portion. Therefore, for example, the vibro hammer of the type in which the driving target is driven by the vibration applied to the driving target. It is possible to cast with a stronger force. That is, the hammer portion of the present invention can generate a sufficient striking force for performing the driving work.

By the way, as described above, since the vibro hammer has a structure in which vibration is generated in the vertical direction, the vibration caused by the operation of the vibro hammer is transmitted to the suspension machine used during work, and the resonance caused by this vibration is transmitted. The suspension machine may be damaged.

On the other hand, according to the hammer portion of the present invention, since the striking piston reciprocates only in the fitting insertion portion direction with a stroke set to a striking length, the direction opposite to the fitting insertion portion (the base side of the hammer portion). ) Does not exert a striking force, but exerts a striking force only in the direction of the fitting insertion portion (the tip side of the hammer portion). By having this structure, the vibration caused by the operation of the driving device is hardly transmitted to the hanging machine used during the work using the driving device, so that the resonance in the hanging device is unlikely to occur. That is, the hammer portion of the present invention can suppress damage to the hanging machine due to resonance during work.

Furthermore, since the hammer portion is of the so-called air hammer type in which the power is compressed air, the striking speed can be easily adjusted by raising or lowering the pressure. Furthermore, since the power of the hammer portion is compressed air, it is possible to suppress the environmental load at the time of generation and discharge of the working fluid.

Then, the movable joint portion of the present invention is hit by the striking piston and can move forward and backward with a predetermined stroke in the axial direction, so that the striking force from the hammer portion is transmitted to the attached chuck portion. Can be done.

Further, since the chuck portion is attached to the movable joint portion, the striking force can be transmitted from the hammer portion via the movable joint portion. In addition, the chuck portion can pinch the object to be driven and can transmit the striking force to the pinched object to be driven, so that the object to be driven is sent to the place to be driven (mainly on the ground) with the transmitted striking force. Can be cast.

Further, when the hammer portion has a removable weight portion, the total weight of the hammer portion can be changed. As a result, for example, when it is necessary to drive the object to be driven deep into the ground, the weight portion is attached to the hammer portion to increase the overall weight, and a load is also applied to drive the object during work. The striking force of the installation device can be improved.

On the other hand, when it is not necessary to drive the object to be driven deep into the ground, the weight portion may be removed from the hammer portion, and even in that case, the casting operation can be performed only by the weight of the hammer portion. Further, when the weight portion does not need to be attached, the weight portion can be removed from the hammer portion to reduce the overall weight of the hammer portion, which improves convenience during transportation and storage.

It should be noted that the weight portion does not exclude attachment / detachment to / from not only the hammer portion but also the movable joint portion or the chuck portion (hereinafter, referred to as “movable joint portion or the like” in this paragraph). However, since the movable joint portion or the like is a portion that moves at high speed by itself, the stress applied to the movable joint portion or the like is further increased by attaching the weight portion. As a result, fatigue fracture of constituent materials such as movable joints may occur, and vibration may increase due to work, which is not preferable.

In order to achieve the above object, the driving machine of the present invention includes a cylinder having an inset at the tip and a striking piston which is arranged in the cylinder and reciprocates in the axial direction of the cylinder by compressed air. , The stroke of the striking piston in the reciprocating state is fitted into the hammer part and the fitting part having a structure in which only the direction of the fitting insertion part is set to be able to hit, and is hit by the striking piston and the hammer. A movable joint part that can move forward and backward with a predetermined stroke in the axial direction of the part, and a movable joint part that is attached to the movable joint part and can pinch the object to be driven, and hits the pinched object to be driven through the movable joint part. A driving device having a chuck portion capable of transmitting force and a driving device are suspended so that the chuck portion faces the ground and the axial direction of the cylinder is perpendicular to or substantially vertical to the ground. Equipped with a hanging machine that can be lowered.

Here, in the driving device of the present invention, the hammer portion has a structure in which the striking piston reciprocates in the cylinder in the axial direction, so that the striking force can be transmitted to the fitted movable joint portion. Then, in the driving device of the present invention, the movable joint portion and the chuck portion are attached, and the casting target sandwiched between the chuck portions can be driven. That is, the driving device of the present invention can drive an object to be driven with a striking force from the hammer portion.

Further, the driving device of the present invention has a structure in which the driving target is driven by the striking force from the hammer portion. Therefore, for example, the vibro hammer of the type in which the driving target is driven by the vibration applied to the driving target. It is possible to cast with a stronger force. That is, the hammer portion of the present invention can generate a sufficient striking force for performing the driving work.

By the way, as described above, since the vibro hammer has a structure in which vibration is generated in the vertical direction, the vibration caused by the operation of the vibro hammer is transmitted to the suspension machine used during work, and the resonance caused by this vibration is transmitted. The suspension machine may be damaged.

On the other hand, according to the hammer portion of the present invention, since the striking piston reciprocates only in the fitting insertion portion direction with a stroke set to a striking length, the direction opposite to the fitting insertion portion (the base side of the hammer portion). ) Does not exert a striking force, but exerts a striking force only in the direction of the fitting insertion portion (the tip side of the hammer portion). By having this structure, the vibration caused by the operation of the driving device is hardly transmitted to the hanging machine used during the work using the driving device, so that the resonance in the hanging device is unlikely to occur. That is, the hammer portion of the present invention can suppress damage to the hanging machine due to resonance during work.

Furthermore, since the hammer portion is of the so-called air hammer type in which the power is compressed air, the striking speed can be easily adjusted by raising or lowering the pressure. Furthermore, since the power of the hammer portion is compressed air, it is possible to suppress the environmental load at the time of generation and discharge of the working fluid.

Further, in the driving device of the present invention, the movable joint portion is hit by the striking piston and can move forward and backward with a predetermined stroke in the axial direction, so that the striking force can be transmitted to the attached chuck portion. ..

Furthermore, in the driving device of the present invention, since the chuck portion is attached to the movable joint portion, the striking force can be transmitted from the hammer portion via the movable joint portion. In addition, the chuck portion can pinch the object to be driven, and by being able to hit the pinched object to be driven, the hitting force transmitted can be used to place the object to be driven (mainly on the ground). Can be placed in.

Then, the suspending machine of the present invention can suspend the chuck portion so that the chuck portion is directed toward the ground and the axial direction of the cylinder is perpendicular to or substantially vertical to the ground. It is possible to prevent work troubles caused by burying the object to be installed diagonally in the ground. In addition, the work obstacle means, for example, that the object to be driven cannot be driven to a desired position or depth, or the intermediate portion is bent in the middle of the driving work due to the fixing force by the soil and the striking force from the driving machine. Can be mentioned.

In order to achieve the above object, the driving method of the present invention includes a cylinder having an inset at the tip and a striking piston which is arranged in the cylinder and reciprocates in the axial direction of the cylinder by compressed air. , The stroke of the striking piston in the reciprocating state is fitted into the hammer part and the fitting part having a structure in which only the direction of the fitting insertion part is set to be able to hit, and is hit by the striking piston and the hammer. It has a movable joint part that can move forward and backward with a predetermined stroke in the axial direction of the part, and a chuck part that is attached to the movable joint part and can transmit a striking force through the movable joint part to the sandwiched object to be driven. Using a driving device, set the chuck part and the pinched object to be driven toward the ground and set the axial direction of the cylinder to be approximately vertical with respect to the ground, or the axial direction of the cylinder is set. The first step of setting the piston so that it is perpendicular to the ground and the compressed air supplied into the cylinder cause the striking piston to reciprocate in the axial direction, and the striking force generated by the reciprocating motion is used to reciprocate the object to be driven. It includes a second step of placing it on the ground.

Here, according to the first step of the driving method of the present invention, the hammer portion of the driving device has a structure in which the striking piston reciprocates in the axial direction in the cylinder, so that the movable joint is fitted. The striking force can be transmitted to the part. Then, in the driving device of the present invention, the movable joint portion and the chuck portion are attached, and the casting target sandwiched between the chuck portions can be driven. That is, the driving device of the present invention can generate a sufficient striking force for performing the driving work, and the driving object can be driven by this striking force.

Further, according to the first step described above, the cylinder is set so that the axial direction of the cylinder is substantially vertical to the ground, or the axial direction of the cylinder is set to be perpendicular to the ground. By doing so, the axial direction of the cylinder can be made vertical or substantially vertical to the ground, and the object to be cast can also be made vertical or substantially vertical to the ground. As a result, it is possible to reduce the occurrence of work obstacles due to the oblique embedding of the object to be placed in the ground.

Then, according to the second step of the driving method of the present invention, the striking piston reciprocates in the axial direction with the compressed air supplied into the cylinder to generate a striking force, and the generated striking force is sandwiched between the chuck portions. It can be transmitted to the object to be cast. Then, with this striking force, the object to be driven can be driven on the ground.

Further, according to the driving method of the present invention, the structure is such that the object to be driven sandwiched between the chuck portions is driven by the striking force from the hammer portion, so that, for example, the object to be driven is driven by vibration. It is possible to drive with a stronger force than the vibro hammer, which is a method of driving an object. That is, the driving method of the present invention can generate a sufficient striking force for performing the driving work.

Furthermore, according to this driving method, the striking piston exerts a striking force only in the direction of the fitting insertion portion, so that the suspension machine used during the work using the driving device can be used with the driving device. Since the vibration caused by the operation is hardly transmitted, resonance in the suspension machine is unlikely to occur. That is, unlike the vibro hammer, the casting method of the present invention can suppress damage to the suspension machine due to resonance during work.

In addition, since this driving method is a so-called air hammer type in which the power of the hammer portion is compressed air, the striking speed can be easily adjusted by raising or lowering the pressure. Furthermore, since the power of the hammer portion is compressed air, it is possible to suppress the environmental load at the time of generation and discharge of the working fluid.

According to the driving device, the driving machine and the driving method of the present invention, the driving object can be driven with a sufficient striking force, and the suspension machine is damaged due to resonance during work. It can be suppressed.

It is an overall block diagram of the driving machine of this invention. It is explanatory drawing which shows the driving apparatus of the driving machine shown in FIG. It is an exploded explanatory view which shows the structure of the driving apparatus shown in FIG. It is a vertical cross-sectional view explanatory view which shows the structure of the intermediate part to the tip part of the driving apparatus shown in FIG. It is an exploded perspective explanatory view which shows the structure of the intermediate part to the tip part of the driving apparatus shown in FIG. (A) is an explanatory diagram showing a prior art (vibro hammer) described in Non-Patent Document 1, and (b) is an explanatory diagram of a usage state of the vibro hammer shown in (a).

Embodiments of the present invention will be described in more detail with reference to FIGS. 1 to 5. In addition, the reference numerals in each drawing are attached within a range that reduces complexity and facilitates understanding, and a plurality of equivalents having the same reference numerals may be assigned only a part thereof. ..

The driving machine 1 shown in FIG. 1 includes a driving device 2 and a crane wheel 3 (corresponding to the above-mentioned “hanging machine”) for suspending the excavating device 2. Each part will be described in detail below.

(Driving device 2)
See FIGS. 1 to 5. The driving device 2 includes a hammer portion 21, a weight portion 22 attached to the base end of the hammer portion 21, a movable joint portion 23 attached to the tip of the hammer portion 21, and a spacer portion 24 attached to the movable joint portion 23. And has a chuck portion 25 attached to the spacer portion 24.

The hammer unit 21 is a so-called air hammer that is driven by compressed air supplied from a compressor (not shown) outside the machine. When the pressure of the compressed air is increased, the reciprocating speed of the striking piston 211 becomes faster (that is, the striking speed is faster), while when the pressure of the compressed air is decreased, the reciprocating speed of the striking piston 211 increases. The structure is slow (that is, the striking speed is slow), and the striking speed can be easily adjusted. In the present embodiment, the configuration of the driving device is as described above, but the driving device in which the compressor is integrated with the hammer portion or another structural portion is not excluded.

The hammer portion 21 has a striking piston 211 (see FIGS. 3 and 4) that reciprocates in the cylinder 210 in the axial direction inside the cylindrical cylinder 210. , Check valve, air distributor, valve spring, make-up ring, O-ring, piston reciprocating ring, bit reciprocating ring, etc., and a known down-the-hole hammer drive mechanism (for example, Japanese Patent Application Laid-Open No. 61-92288). It has almost the same structure as (described).

The operation of the hammer portion 21 will be briefly described. The compressed air that has flowed into the cylinder 210 first passes through the side surface of the striking piston 211 and turns to the tip side (lower side of FIGS. 3 and 4) of the cylinder 210, whereby the striking piston 211 moves to the base end side of the cylinder 210. It moves to (upper side of FIGS. 3 and 4) (in this embodiment, it can be paraphrased as "the striking piston 211 rises (or jumps up)").

Next, as the striking piston 211 moves, the end of the connecting shaft 231 of the movable joint portion 23 (the upper end of the connecting shaft 231 in FIGS. 3 and 4) and the tip of the striking piston 211 (the striking in FIGS. 3 and 4) will be described later. A gap is created between the piston 211 and the lower end of the piston 211, and the compressed air pushing up the striking piston 211 flows into the striking piston 211 from this gap. Then, the compressed air that has flowed into the striking piston 211 flows in from the opening 235 at the base end of the connecting shaft 231 and enters the inside of the connecting shaft 231 at that pressure, passes through this, and moves from the hammer portion 21 side to the movable joint portion. It moves to the 23 side and is discharged.

As a result, the striking piston 211 moves (descends or falls) toward the tip end side (lower side of FIG. 4) of the cylinder 210. By repeating this operation, the striking piston 211 reciprocates, and the impact when the striking piston 211 moves (falls) to the tip side applies a striking force to the movable joint portion 23, and the movable joint portion 23 operates by this striking force. ..

Further, the hammer portion 21 is provided with a connecting joint 212 on the base end side (upper side of the hammer portion 21 in FIGS. 2 and 3) and a movable joint on the tip end side (lower side of the hammer portion 21 in FIGS. 2 and 3). The portion 23 is fitted.

The connecting joint 212 has a hexagonal columnar shape, the base portion is fixed to the hammer portion 21, and the opening portion 213 is formed at the tip portion. The connecting joint 212 has a ventilated air passage 214 along its axial direction. One end of the air passage 214 is an opening 213, and the other end opens into the cylinder 210 and communicates with the inside of the cylinder 210. In the present embodiment, the connecting joint 212 is connected to the weight portion 22, but the present invention is not limited to this. For example, the weight portion 22 is removed and directly connected to the hanging shaft body 33. You can also do it.

The weight portion 22 is continuously provided at the base end of the hammer portion 21 (in other words, a position of the hammer portion 21 opposite to the movable joint portion 23. The upper stage of the hammer portion 21 in FIGS. 1 and 2). The weight portion 22 is fitted with a weight body 221 which is a columnar iron ingot having a predetermined length in which a ventilation path 222 capable of ventilating along the axial direction is formed, and the connection joint 212 described above on the tip end side of the weight body 221. It has an insertable receiving hole 223 and a hexagonal columnar connecting joint 224 provided on the base end side of the weight body 221. The ventilation passage 222 is provided so as to be able to ventilate from the base end of the connecting joint 224 to the receiving hole 223.

In the present embodiment, the weight portion 22 has the above-mentioned structure, but is not limited to this. For example, a ventilation pipe having an outer diameter smaller than the inner diameter of the weight body is passed through the tubular weight body. The weight may be adjustable by appropriately filling sand, liquid, or the like between the inner wall of the weight body and the outer wall of the ventilation pipe. Further, in the present embodiment, the number of weight portions 22 is one, but the weight portion 22 is not limited to this, and for example, a plurality of weight portions having the same structure may be connected to each other, or the weight portions 22 may be provided in a short length. A plurality of weight portions may be connected so that the weight can be adjusted to a desired value.

The movable joint portion 23 has a structure in which the movable joint portion 23 is attached to the tip of the hammer portion 21 so as to be able to advance and retreat in a predetermined stroke in the axial direction, and is hit by the hitting piston 211.

More specifically, the movable joint portion 23 is fitted and attached from the tip end side of the hammer portion 21, and has a connecting shaft 231 that receives the striking force from the striking piston 211 at the base end and a flange provided at the tip end of the connecting shaft 231. It has a connecting plate 232 which is a disk in the shape of a disk. The connecting shaft 231 is attached by the above-mentioned hammer bit retina ring and O-ring so as not to come off from the hammer portion 21 side.

The connecting shaft 231 has a cylindrical shape formed with an outer diameter that can be fitted into the cylinder 210, is a free end having an opening 235 formed at the base end, and has a tip fixed to the connecting plate 232. In addition, the connecting shaft 231 has a plurality of spline shafts (reference numerals omitted) formed along the axial direction of the connecting shaft 231 in a region on the connecting plate 232 side from the middle of the outer peripheral surface in the axial direction. This spline shaft can prevent rotation in the circumferential direction and guide movement in the advancing / retreating direction when the spline shaft is inserted into the cylinder 210.

Further, in the movable joint portion 23, a ventilable air passage 234 (shown in FIG. 4) is formed from the base end of the connection shaft 231 to the back surface of the connection plate 232, and the air passage 234 has a spacer portion 24 direction. A check valve (not shown) that can prevent the backflow of compressed air flowing through the air is provided. The connection plate 232 is formed with a plurality of bolt insertion holes 233 penetrating from the front surface to the back surface in the region between the center and the outer peripheral edge.

The spacer portion 24 is attached between the movable joint portion 23 and the chuck portion 25, and has a structure that connects the movable joint portion 23 and the chuck portion 25 at predetermined intervals. According to the spacer portion 24, the impact can be alleviated so that the chuck portion 25 is not damaged by the impact force transmitted from the movable joint portion 23. Further, by using a second connecting plate 243 whose outer shape and the arrangement of the bolt insertion holes 246 are changed, which will be described later, it is possible to attach a chuck portion having a different shape.

More specifically, the spacer portion 24 is a first flange-shaped disk provided on the tubular body portion 241 and the base end side of the body portion 241 (upper side of the spacer portion 24 in FIGS. 1 to 4). From the connecting plate 242, the second connecting plate 243 which is a flange-shaped rectangular plate provided on the tip side of the body portion 241 (lower side of the spacer portion 24 in FIGS. 1 to 4), and the outer peripheral surface of the body portion 241. It is a plurality of plate-shaped members that project radially, and has a plurality of reinforcing ribs 244 arranged between the first connecting plate 242 and the second connecting plate 243.

The body portion 241 is formed with a ventilation hole 245 on the side wall, whereby the compressed air that has flowed into the body portion 241 from the hammer portion 21 via the movable joint portion 23 can be discharged to the outside.

The outer shape of the first connection plate 242 is substantially the same as that of the connection plate 232 of the movable joint portion 23, and a ventilation hole 248 penetrating the body portion is formed at substantially the center. Further, the first connection plate 242 is a bolt insertion hole penetrating from the front surface to the back surface in the region between the ventilation hole 245 and the outer peripheral edge and at a position corresponding to the bolt insertion hole 233 provided in the movable joint portion 23. 246 is formed.

Then, the movable joint portion 23 and the spacer portion 24 are connected by aligning the positions of the bolt insertion hole 233 and the bolt insertion hole 246 and communicating with each other, inserting the bolt B into each hole, and tightening with the nut N. Can be done.

The second connection plate 243 is formed to have substantially the same outer shape as the connection plate 252 of the chuck portion 25, which will be described later. Further, the second connection plate 243 is formed with a bolt insertion hole 247 penetrating from the front surface to the back surface in the region between the center and the outer peripheral edge.

As shown in FIGS. 2 to 4, the reinforcing rib 244 has an upper end fixed to the lower surface of the first connecting plate 242 and a lower end fixed to the upper surface of the second connecting plate 242. By being provided at this position, the reinforcing rib 244 reinforces the first connecting plate 242 or the second connecting plate 243 so as not to be bent by the load from the hammer portion 21 or the reaction force from the chuck portion 25. , The striking force received from the hammer portion 21 can be transmitted without loss.

In the present embodiment, the movable joint portion 23 and the spacer portion 24 are separate members, but these may be provided integrally. However, while the connecting shaft is worn out and replaced relatively frequently, the other parts are replaced less frequently, and it is rational to replace the entire part including all parts at the replacement timing of the connecting shaft. Therefore, it is preferable to have a structure in which the movable joint portion 23 and the spacer portion 24 can be separated.

The chuck portion 25 is attached to the spacer portion 24, has a structure capable of sandwiching the driving object A, and has a structure in which the sandwiched object A is hit.

More specifically, the chuck portion 25 includes a main body portion 251 and a connection plate 252 which is a flange-shaped rectangular plate provided on the base end side of the main body portion 251 (upper side of the chuck portion 25 in FIGS. 2 to 4). It has a gripping claw portion 253 provided on the tip end side of the main body portion 251 (lower side of the chuck portion 25 in FIGS. 2 to 4).

The outer shape of the connection plate 252 is formed to be substantially the same as that of the second connection plate 243 of the movable joint portion 23. Further, in the connection plate 252, a bolt insertion hole 254 penetrating from the front surface to the back surface is formed in the region between the center and the outer peripheral edge and at a position corresponding to the bolt insertion hole 247 provided in the movable joint portion 23. Has been done. Then, the spacer portion 24 and the chuck portion 25 can be connected by aligning the positions of the bolt insertion hole 247 and the bolt insertion hole 254 and communicating with each other, inserting the bolt B into each hole, and tightening with the nut N. can.

The gripping claw portion 253 is a hydraulic type, has opposing claws, and has a structure (one sandwiching portion) in which the other claw (movable) advances and retreats with respect to one claw (immovable). However, the present invention is not limited to this aspect, and may be, for example, a mechanical type or a pneumatic type, and the sandwiched portion is provided so that the end face of the steel pipe can be grasped by sandwiching the thick portions facing each other in the radial direction. There may be two or the like.

(Crane car 3)
See FIG. The crane vehicle 3 has a boom 31, a hanging shaft body 32 provided at the tip of the boom 31, and a self-propelled vehicle body 33. The crane vehicle 3 has a driving device 2 and a chuck portion 25 facing downward. It can be suspended (that is, facing the ground) and so that the axial direction of the cylinder 210 of the crane portion 21 is perpendicular to or substantially vertical to the ground.

The height at which the hanging shaft body 32 is suspended is adjusted by a wire (reference numeral omitted) drawn from the boom 31. Further, a supply pipe 34 is connected to the suspension shaft body 32, and compressed air is supplied from an external compressor (compressed air supply source) to the hammer portion 21 via the supply pipe 34.

In the present embodiment, the mobile crane vehicle 3 is used as the crane, but the present invention is not limited to this, and for example, a fixed crane may be used.

(Placement method)
A driving method using the driving machine 1 will be described.
(1) Move the driving machine 1 to the work place.
(2) The crane wheel 3 and the driving device 2 are connected via the suspension shaft body 32.
(3) The object A to be driven is sandwiched by the chuck portion 25.

(4) By lifting the driving device 2 with the crane wheel 3, the driving object A and the chuck portion 25 are directed to the ground G, which is the planned driving location, and the cylinder 210 and the driving target are placed with respect to the ground G. Set so that the axial direction of the object A is substantially vertical, or set so that the axial direction of the cylinder 210 and the object A to be driven is perpendicular to the ground.

(5) Compressed air is supplied from the compressor (outside the machine). As a result, the striking piston 211 reciprocates (moves up and down) in the axial direction of the cylinder 210, and the striking force from above is transmitted to the sandwiched object A to be driven. At this time, a pressing force toward the ground due to the weight of the driving device 2 is also applied. That is, the driving object A is more stably driven with respect to the ground G by adding the weight of the driving device 2 to its own weight and further applying the striking force of the driving device 2.

As described above, according to the driving machine 1 and the driving method in the present embodiment, the driving object A can be driven with a sufficient striking force.

In addition, according to the driving machine 1 and the driving method, the structure is such that resonance is less likely to occur during work as compared with the case where a vibro hammer type device is used. It is possible to suppress damage and generate a sufficient striking force that is greater than that of a vibro-crane type device.

Further, according to the driving machine 1 (driving device 2) and the driving method, the generation of vibration and noise during work can be reduced as compared with the driving device of the diesel hammer type or the hydraulic hammer type. Can be done.

Further, since the hammer portion 21 is an air hammer type, the striking speed can be easily adjusted by raising or lowering the pressure of the compressed air. Further, since the power of the hammer portion 21 is compressed air, it is possible to suppress the environmental load at the time of generation and discharge of the working fluid.

Furthermore, since the weight portion 22 is provided, the striking force of the driving device 2 during work can be improved, while when the weight portion 22 does not need to be attached, it can be removed from the hammer portion 21. , The overall weight of the hammer portion 21 can be reduced, and the convenience during transportation and storage is improved.

The terms and expressions used in the present specification and the claims are for explanatory purposes only and are not limited in any way. The features described in the present specification and the claims and the features thereof. There is no intention to exclude terms or expressions that are equivalent to some. Further, it goes without saying that various modifications are possible within the scope of the technical idea of the present invention. In addition, words such as first and second do not mean grade or importance, but are used to distinguish one element from another.

1 Driving machine 2 Driving device 21 Hammer part 210 Cylinder 211 Strike piston 212 Connecting joint 213 Opening 214 Ventilation path 22 Weight part 221 Weight body 222 Ventilation path 223 Receiving hole 224 Connecting joint 23 Movable joint part 231 Connection shaft 232 Connection plate 233 Bolt insertion hole 234 Ventilation path 235 Opening 24 Spacer part 241 Body part 242 First connection plate 243 Second connection plate 244 Reinforcing rib 245 Ventilation hole 246 Bolt insertion hole 247 Bolt insertion hole 248 Ventilation hole 25 Chuck part 251 Main body part 252 Connection plate 253 Grip claw 254 Bolt insertion hole 3 Crane car 31 Boom 32 Suspended shaft body 33 Body 34 Supply pipe A Placement target G Ground B Bolt N Nut 9 Vibro hammer 91 Motor 92 Rotator 93 Crane car

Claims (4)

It has a cylinder with a fitting insertion part at the tip and a striking piston that is arranged in the cylinder and reciprocates in the axial direction of the cylinder by compressed air, and the stroke of the striking piston in the reciprocating state is , The hammer part of the structure set to the length that can hit only the fitting insertion part direction,
A movable joint portion that is fitted into the fitting insertion portion, is hit by the striking piston, and can move forward and backward with a predetermined stroke in the axial direction of the hammer portion.
A spacer portion having a structure attached to the movable joint portion and having a tubular body portion having a predetermined length extending in the direction opposite to the hammer portion.
A chuck attached to the spacer portion, capable of sandwiching the object to be driven, and capable of transmitting the striking force from the striking piston transmitted through the movable joint portion and the spacer portion to the sandwiched object to be driven. A driving device equipped with a part. The movable joint portion has a structure in which a ventilable ventilation path from the base portion to the tip portion is formed, and the tip portion side of the ventilation path and the inside of the body portion of the spacer portion communicate with each other.
The driving device according to claim 1, wherein the spacer portion has a structure in which a ventilation hole capable of exhausting compressed air flowing from the movable joint portion is formed in the body portion. The stroke of the striking piston in the reciprocating state includes a cylinder provided with a fitting insertion portion at the tip and a striking piston arranged in the cylinder and reciprocating in the axial direction of the cylinder by compressed air. A hammer portion having a structure in which only the direction of the fitted insertion portion is set to a length capable of striking, the hammer portion is fitted into the fitted insertion portion and is striked by the striking piston, and a predetermined stroke in the axial direction of the hammer portion. A movable joint portion that can be moved forward and backward, a spacer portion that is attached to the movable joint portion and has a tubular body portion having a predetermined length extending in the direction opposite to the hammer portion, and a spacer portion that is attached to the spacer portion. A driving device having a chuck portion capable of sandwiching an object to be driven and capable of transmitting a striking force from the striking piston transmitted through the movable joint portion and the spacer portion to the pinched object to be driven. ,
The driving machine is provided with a lifting machine capable of suspending the chuck portion so that the chuck portion faces the ground and the axial direction of the cylinder is perpendicular to or substantially vertical to the ground. .. The stroke of the striking piston in the reciprocating state includes a cylinder provided with a fitting insertion portion at the tip and a striking piston arranged in the cylinder and reciprocating in the axial direction of the cylinder by compressed air. A hammer portion having a structure in which only the direction of the fitted insertion portion is set to a length capable of striking, the hammer portion is fitted into the fitted insertion portion and is striked by the striking piston, and a predetermined stroke in the axial direction of the hammer portion. A movable joint portion that can be moved forward and backward, a spacer portion having a structure that is attached to the movable joint portion and has a cylindrical body portion having a predetermined length extending in the direction opposite to the hammer portion, and a spacer portion that is attached to the spacer portion. A driving device having a chuck portion capable of sandwiching an object to be driven and capable of transmitting a striking force from the striking piston transmitted through the movable joint portion and the spacer portion to the pinched object to be driven. It is used, and the chuck portion and the sandwiched object to be driven are set toward the ground and the axial direction of the cylinder is substantially vertical with respect to the ground, or the axial direction of the cylinder is set. The first step of setting so that it is perpendicular to the ground,
The striking piston is reciprocated in the axial direction by the compressed air supplied into the cylinder, and the striking object is driven into the ground by the striking force generated by the reciprocating motion. Installation method.

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