JP4479987B2 - Stroke force generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an optimum striking force generator applied to a drilling device, a pile driving machine, a hydraulic breaker, a geological surveying machine, an intrusion testing machine, and the like.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a device has been provided in which a spring for urging the weight hammer is provided on the weight hammer and a hit object is hit with a hitting force caused by the weight hammer falling. According to this device, a weighted striking force of the weight of the weight hammer and the biasing force of the spring is generated, so that a large striking force can be obtained even with a short drop distance.
The present applicant has already provided a drilling device employing such a striking force generator. This drilling device is provided on a weight hammer slidably provided on a guide rod fixed in a vertical direction, a lift for lifting and dropping the weight hammer, and a weight hammer provided on a drop line of the weight hammer. It is composed of a hammer sub (a hit object) that is struck by the fall of the sword and a spring that urges the weight hammer, and the weight hammer is lifted to a predetermined height by a lift and dropped, When the weight hammer is lifted by the lift, the spring is compressed, and when the weight hammer falls, the weight hammer is urged. As a result, the hammer sub is struck with a striking force obtained by weighting the striking force of the free fall of the weight hammer and the urging force of the spring (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
Utility Model Registration No. 3085813 Publication [0004]
[Problems to be solved by the invention]
The striking force generator employed in the drilling device is preferable because a large striking force is generated in the drilling device. However, in order to apply not only to the drilling device but also to pile driving machines, hydraulic breakers, geological surveying machines, and penetration testing machines, the lift of the striking force generator employed in the drilling device is suspended between the sprockets. The weight hammer locking member is fixed to the rotated chain, and the weight hammer is locked by the locking member by the movement of the chain driven by the motor connected to the sprocket and lifted upward from below and dropped. Therefore, there are the following issues to be improved.
(1) It is difficult to match the timing of lifting and dropping the weight hammer.
(2) The number of hits within a predetermined time cannot be increased too much.
(3) When the moving distance (falling distance) of the weight hammer is short, the adoption becomes difficult. Therefore, it also hinders downsizing.
(4) Since the chain is suspended around at least two sprockets, the space is required, and the size is increased and the structure is complicated.
In view of the above, the present invention solves the above-described problems, and provides a striking force generator that is highly versatile, can generate a large striking force, and is easy to adjust the striking force and the number of striking times. It is to be provided.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the impact force generating device of the present invention is synchronized with a weight hammer provided slidably with respect to a guide rod , a spring for applying a biasing force to the weight hammer, and both sides of the weight hammer. A circle provided with a locking portion that is rotatably provided and locks the weight hammer from its original position by rotating to move it in a direction in which the biasing force of the spring increases and releases the locking at a predetermined position. ; and a shape or a propeller-shaped rotary member, and locks the weight hammer with rotation of the rotary body is moved in a direction in which the urging force of the spring is increased, the weight hammers by releasing the locking in position move the length of the diameter of the rotating body to the original position direction by the biasing force of the gravity and the spring as a drop height, struck by weight force of the biasing force of gravity and the spring of weight hammers The characterized in that it hit.
As a result, the hit object can be hit with a weight force of the gravity of the weight hammer and the biasing force of the spring. Further, the weight hammer can be lifted and rotated by rotation of a circular or propeller-like rotating body. Furthermore, since the weight hammer is lifted by the rotation of the rotating body and the fall is performed within the height of the diameter of the rotating body without using a chain or sprocket, it is effective for hitting piles or the like with a small drop distance, and A small striking force generator can be provided.
[0006]
Further, the impact force generating device of the present invention is provided with a weight hammer provided slidably with respect to the guide rod , a spring for applying a biasing force to the weight hammer, and synchronously rotatable on both sides of the weight hammer. locking portion for releasing the engagement at a predetermined position with the biasing force of the spring engages the weight hammer from the original position moves in a direction to increase by rotating are provided circular or propeller-shaped Comprising a rotating body and a hammer sub hit by a weight hammer;
The hammer sub is provided with a spindle gear so as to be relatively movable through a spline connection or directly via a spindle, and a motor gear meshes with the spindle gear so as to be rotatable. The weight hammer is locked and moved in the direction in which the biasing force of the spring increases, and when the latch is released at a predetermined position, the weight hammer moves in the direction of the original position by the gravity and the biasing force of the spring. The hammer sub is hit by a weighting force of the gravity of the spring and the biasing force of the spring.
Thereby, in addition to the above-described effects, a striking force and a rotational force can be applied to the member connected to the hammer sub. Specifically, the striking force, rotational force and feed force can be selectively applied, and the impact force can be increased / decreased, the number of times of striking, the number of revolutions, etc. can be adjusted. It can be used for machines, hydraulic breakers, geological survey machines and penetration testing machines, etc., and is extremely versatile. For example, it can be used not only for drilling (digging) but also for geological surveys by using a sampler, core tube or the like at the tip of the drilling rod.
[0007]
In the striking force generator according to the present invention, the weight hammer is provided slidably along the guide rod or in the guide tube.
As a result, the weight hammer moves while being guided by the guide rod or the guide cylinder, so that the hit object or the hammer sub can be hit accurately.
[0008]
Furthermore, the striking force generator of the present invention is characterized in that the spring is a compression spring.
As a result, the spring is provided so as to be compressed by the movement of the weight hammer, so that an urging force can be easily applied.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments shown in the drawings of the present invention will be described in detail below. FIGS. 1A and 1B are cross-sectional views for explaining the basic principle of the present invention. FIG. 1A shows a state before operation, and FIG.
As shown in the figure, the striking force generator of the present invention includes a weight hammer 13 slidably provided on a guide rod 12 fixed to a machine frame, for example, a part of a case 10, and a weight hammer 13. A compression spring 14 that applies an urging force, and the weight hammer 13 is locked from its original position by rotating to move in the direction in which the urging force of the compression spring 14 increases (in this example, it moves upward) and at a predetermined position. And a rotating body 17 provided with a locking portion 18 for releasing the locking.
[0010]
The weight hammer 13 is provided with a projection 13a that the locking portion 18 locks when the rotating body 17 rotates. A motor 19 is connected to the rotating body 17 and is driven to rotate. Therefore, when the rotating body 17 is rotated, the locking portion 18 of the rotating body 17 locks the protrusion 13a of the weight hammer 13 and lifts it upward as shown in FIG. At this time, the compression spring 14 is compressed by the weight hammer 13 and the urging force is increased. When the locking portion 18 of the rotating body 17 rotates and passes through the top dead center, the locking portion 18 and the protrusion 13a of the weight hammer 13 are unlocked, so that the weight hammer 13 is attached to its own weight and the spring 14. It falls by power and hits the hit object (for example, hammer sub) 15. This striking force is a weighting force of the weight of the weight hammer 13 and the biasing force of the spring 14.
[0011]
In the striking force generator shown in FIGS. 1 (a) and 1 (b), one protrusion 18 is provided at a position on the circular orbit where the rotating body 17 rotates. The number of hits. Therefore, the number of hits within a predetermined time is determined by the rotational speed. However, if a plurality of protrusions 18 are provided on the same circular orbit where the rotator 17 rotates, the number of hits increases even at the same rotational speed. For example, when the protrusion 18 is provided at a 180 ° symmetrical position of the rotating body 17, the number of hits is one in one half rotation of the rotating body 17. Therefore, when the rotating body 17 is formed in a propeller shape and the protrusion 18 is provided at the tip thereof, one hit is performed by half rotation of the rotating body 17.
In this striking force generator, the urging force of the spring 14 acts on the weight hammer 13, so that not only the vertical direction but also the striking force in the oblique direction can be applied.
[0012]
2 to 6 show an embodiment in which the striking force generating device is applied to a drilling device, FIG. 2 is a side view thereof, FIG. 3 is a schematic perspective view thereof, and FIG. 4 is an enlarged front view of an essential part thereof. FIG. 5 is an enlarged side view of the main part, and FIG. 6 is an enlarged front view of the main part. The same components as those shown in FIG.
[0013]
In the figure, reference numeral 1 denotes a leader, which is erected on the base machine 2 so as to be able to rise and fall. In this example, the crawler type is shown as the base machine 2, and the base body 4 including the power unit 5 and the control box 6 on the lower traveling body 3 is raised and lowered via the cylinders such as the boom cylinder 7 and the slide cylinder 8. It is set up freely. The base body 4 is provided with an outrigger 9 so that the base machine 2 can be stably supported during work.
In addition, as the base machine 2, not a crawler type but a placement type may be sufficient.
[0014]
The reader 1 is provided with a slide case 10 slidably. The slide case 10 is provided with a driving means, and is advanced and retracted along the reader 1. This driving means may be a conventionally known means. In this example, the cylinder 11 is employed, and the tip of the cylinder rod 11a of the cylinder 11 is fixedly connected to the slide case 10.
[0015]
In the slide case 10, a weight hammer 13 slidably provided on a guide rod 12 fixed in a vertical direction when the leader 1 is erected in a working state, and the weight hammer 13 is attached to the guide rod 12 Rotating body 17 that is lifted and dropped along with, a hammer sub 15 that is provided on a drop line of the weight hammer 13 and is struck by the fall of the weight hammer 13, and a compression that urges the weight hammer 13 in the hammering direction of the hammer sub 15. The spring 14 and the transmission mechanism of the motor 16 that rotates the hammer sub 15 are generally incorporated.
[0016]
The slide case 10 has a rectangular parallelepiped box shape, and the cylinder rod 11a of the cylinder 11 serving as the driving means has its tip fixed to the slide case 10.
Further, the guide rod 12 also has a tip as shown in FIGS. 4 and 5 are suspended is fixed to the top plate 10a of the slide case 10.
[0017]
The weight hammer 13 is slidably provided on the guide rod 12 and can move up and down along the guide rod 12. The weight hammer 13 is provided with a compression spring 14 for biasing the weight hammer 13 in the hammering direction of the hammer sub 15. The spring 14 is provided by being wound around the guide rod 12 between the weight hammer 13 and the top plate 10a. The weight hammer 13 applies striking force to the drilling rod R connected to the hammer sub 15 by striking the hammer sub 15. Therefore, when the compression spring 14 is provided, the urging force of the spring 14 is applied to the impact force of the free fall of the weight hammer 13. It is preferable that the weight hammer 13 is mounted on the guide rod 12 so as not to rotate and to be slidable in the axial direction because the weight hammer 13 does not rotate when the weight hammer 13 is lifted and dropped. In the present example, a disabled rotated using two guide rods 12 as shown in FIG.
[0018]
The weight hammer 13 is lifted to a predetermined height by the rotation of the rotating body 17 and dropped. That is, the rotating body 17 of this example is a propeller shape as shown in FIGS . 4 and 5 , and is connected to the motor 19 and driven to rotate. A locking portion 18 is provided at the tip of the rotating body 17, and a protrusion 13a is provided on the weight hammer 13 so as to be positioned on a circular orbit drawn when the locking portion 18 of the rotating body 17 rotates. Is provided. Accordingly, when the rotating body 17 rotates, the locking portion 18 hits the protrusion 13a at the lowermost position to lock the weight hammer 13 upward, and when the locking portion 18 rotates and moves to the uppermost position, the point in time is reached. Thus, the locking portion 18 is released from the protrusion 13a and the weight hammer 13 falls. Further, when the weight hammer 13 is lifted by the rotation of the rotating body 17, the compression spring 14 is compressed and the urging force is increased, so that the weight hammer 13 is urged when the weight hammer 13 is dropped. The rotating body 17 of this example is provided on the left and right sides of the weight hammer 13 and rotates synchronously to lift and drop the weight hammer 13 with both. Further, since the propeller-like rotator 17 of the present example is provided with the locking portions 18 at both ends, one hitting operation occurs in half rotation. That is, the weight hammer 13 is lifted and dropped once by half rotation of the rotating body 17.
[0019]
At this time, when the weight hammer 13 falls along the guide rod 12, the hammer sub 15 is provided on the drop line, so that the weight hammer 13 strikes the hammer sub 15. The striking force at this time is a striking force obtained by adding the urging force of the compression spring 14 to the striking force of the free fall of the weight hammer 13. In this example, as described above, a single hitting operation is performed by half rotation of the rotating body 17.
Here, the height at which the weight hammer 13 is dropped is determined by the length of the diameter of the rotating body 17 (more precisely, the length from the rotation center to the locking portion 18).
[0020]
The hammer sub 15 is provided concentrically on the drop line of the weight hammer 13. A spindle 20 is provided on the outer periphery of the hammer sub 15 so as not to rotate and is slidable in the axial direction. A spindle gear 21 is provided on the outer periphery of the spindle 20 so as to be relatively movable by spline coupling. A gear (including a pinion) 22 of the motor 16 is meshed. Accordingly, the rotational force generated by driving the motor 16 is transmitted to the hammer sub 15 via the gear 22, the spindle gear 21, and the spindle 20, and is rotated.
Here, the spindle 20 may be eliminated, and the spindle gear 21 may be provided by spline coupling on the outer periphery of the hammer sub 15.
[0021]
Thus, when the drilling rod R is connected to the hammer sub 15, an impact force obtained by applying the biasing force of the compression spring 14 to the impact force of the free fall of the weight hammer 13 and the rotational force of the motor 16 are applied to the drilling rod R. Then, the feeding force by the cylinder 11 is transmitted. Therefore, according to this drilling device, it is possible to drill by applying a striking force, a rotational force and a feeding force to the drilling rod R. Further, since the weight hammer 13 is provided with the compression spring 14, the striking force is applied not only in the vertical direction but also in the oblique direction so that oblique drilling (excavation) is possible.
[0022]
The above embodiment does not limit the present invention, and various modifications are allowed without departing from the spirit of the present invention. For example, the guide of the weight hammer 13 may not be a guide rod but may be guided in a guide cylinder. Further, the position and number of the springs 14 are not limited to the above embodiment.
[0023]
【The invention's effect】
As described above in detail, according to the striking force generator of the present invention, the following effects can be obtained.
(1) Gravity due to the free fall of the weight hammer and the biasing force of the spring are applied as the striking force. Therefore, a large striking force can be applied, and the striking force can be controlled not only by the weight of the weight hammer and the height of lifting (the height of dropping) but also by a spring. Since the falling speed is faster than the free fall of the weight hammer, the number of hits can be reduced, and the drilling efficiency can be improved.
(2) Since the weight hammer is lifted and dropped by the rotation of the rotating body, the fall distance can be reduced and the structure can be simplified, so that the size can be reduced.
[0024]
(3) Since the weight hammer is lifted and dropped by the rotation of the rotating body, adjustment of increase / decrease of the number of hits within a predetermined time is facilitated, and the number of hits by the weight hammer is made plural by one rotation of the rotating body. In addition, since the number of hits can be adjusted by the rotation speed of the rotating body, the number of hits can be increased in combination with the fall speed of the weight hammer.
[0025]
(4) The weight hammer is lifted and dropped by the rotation of the rotating body, and the weight hammer is urged and dropped by the urging force of the spring, so that the timing of hitting can be easily adjusted.
(5) Since the urging force of the spring acts on the weight hammer, the striking force can be applied not only in the vertical direction but also in the oblique direction.
[0026]
(6) A striking force, a rotational force and a feeding force can be selectively applied, and the adjustment of the magnitude of the striking force, the number of times of striking, the number of revolutions, etc. can be adjusted, so It can be used for hydraulic breakers, geological survey machines, penetration testing machines, etc., and is extremely versatile. For example, in addition to drilling, drilling rods can be used for geological surveys by using a sampler, core tube, etc. at the tip of the drilling rod, and the height at which the weight hammer is dropped, the weight of the weight hammer Since the biasing force of the spring can be set freely, it can be used for penetration tests.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view for explaining the basic principle of the present invention, where (a) is before operation and (b) is in operation.
FIG. 2 is a side view showing an embodiment of the present invention.
FIG. 3 is a schematic perspective view showing an embodiment of the present invention.
FIG. 4 is an enlarged front view of a main part showing an embodiment of the present invention.
FIG. 5 is an enlarged side view of a main part showing an embodiment of the present invention.
FIG. 6 is an enlarged front view of an essential part showing an embodiment of the present invention.
[Explanation of symbols]
12 Guide rod 13 Weight hammer 13a Protrusion 14 Compression spring 15 Impacting object (hammer sub)
17 Rotating body 18 Locking part

Claims (4)

A weight hammer that is slidable with respect to the guide rod, a spring that applies an urging force to the weight hammer, and is provided on both sides of the weight hammer so as to be synchronously rotatable. the engagement locks comprises a circular shape or a propeller-shaped rotary member locking portion for releasing the engagement is provided at a predetermined position is moved in a direction to increase the biasing force of the spring, of the rotary body By rotating the weight hammer and moving it in the direction in which the biasing force of the spring increases, by releasing the lock at a predetermined position, the weight hammer moves in the original position direction by the gravity and the biasing force of the spring, A striking force generating device characterized in that a striking object is hit by a weighting force of the weight of a weight hammer and a biasing force of a spring. A weight hammer that is slidable with respect to the guide rod, a spring that applies an urging force to the weight hammer, and is provided on both sides of the weight hammer so as to be synchronously rotatable. A circular or propeller-shaped rotating body provided with a locking portion for releasing the locking at a predetermined position, and a hammer sub to be struck by a weight hammer And
A spindle gear is provided on the hammer sub so as to be relatively movable via a spindle or directly by spline coupling, and a motor gear meshes with the spindle gear so as to be rotatable. The weight hammer is locked and moved in the direction in which the biasing force of the spring increases, and when the latch is released at a predetermined position, the weight hammer moves in the direction of the original position by the gravity and the biasing force of the spring. A striking force generating device characterized by striking a hammer sub by a weighting force of the gravity of the spring and the biasing force of the spring.   The striking force generator according to claim 1 or 2, wherein the weight hammer is slidably provided in the guide tube instead of the guide rod.   The striking force generator according to claim 1, wherein the spring is a compression spring.

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