JP3467252B2 - Automatic penetration tester and method of holding penetration rod - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic penetration tester for judging various soil types at various depths and investigating the hardness and softness of the ground and a method for holding a penetration rod.

[0002]

2. Description of the Related Art Conventionally, in various civil engineering work sites, in order to carry out the work safely and efficiently, the ground of the site is investigated before the construction work is carried out. This ground survey is performed by a so-called penetration test, which determines various soil properties at each depth and knows the hardness and softness of the soil depending on the type of soil, and various penetration test machines are used to perform this penetration test. Is used.

A typical example thereof is shown in the figure and described below.
The penetration tester 100 shown in FIG. 15 has a loading table 102 that can be moved up and down along a frame 101, and a clamp 104 that holds a shaft-shaped penetration rod 103 on the loading table 102.
And the clamp 104 is connected to the clamp 104 by a chain (not shown) so as to be integrated with the clamp 104.
A motor 105 for rotating and driving the motor 3 is provided. The clamp 104 is composed of a hammer chuck that is widely used for holding various shaft-like members, and the tip of the penetrating rod 103 held by the clamp 104 has a substantially conical shape and has a spiral groove formed in the outer peripheral portion. The body 106 is connected. Further, a weight hanging 107 is provided in front of the loading platform 102, and a weight 108 for adjusting a load applied to the penetration rod 103 during a penetration test is suspended on the weight hanging 107. The penetration rod 103 in this penetration tester is used by replenishing it several times during the penetration test in order to obtain a length up to the target depth of the penetration test.

[0004] The penetration test is performed by the weight hanging 1 of the penetration tester 100.
The weight 108 is gradually suspended until a predetermined weight is reached at 07, and the penetration body 103 is submerged by the load, and after the subsidence of the penetration body 103 is stopped, the motor 105 is rotationally driven to penetrate the penetration rod. 103 is rotated, the penetrating body 103 is penetrated into the ground, various types of data are recorded, and the process proceeds, and the soil quality is determined based on the collected data. In this penetration test, the penetration speed may become abnormally high depending on the type of soil during the penetration of the penetration body 103 into the ground. This is generally called self-sinking, and the penetrating body 103 sinks into the ground regardless of the rotation, and the determination of the occurrence of this self-sinking depends on the visual determination of the operator.

[0005]

However, in the above-mentioned conventional penetration testing machine, the penetration rods must be successively replenished in order to penetrate the penetration rod to a predetermined depth. In the addition of this penetrating rod, after connecting a new penetrating rod to the end of the penetrating rod penetrating into the ground, the clamp is operated to hold the newly connected penetrating rod. In the clamp, there is a problem that it takes time to hold the penetrating rod.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a loading platform which is vertically movable, a chuck unit which is rotatably disposed on the loading platform, a drive source section for rotating the chuck unit, and the chuck. An automatic penetration tester comprising a penetration rod held by a unit, wherein the penetration rod has a locking portion, and the chuck unit is configured such that the penetration rod can be inserted therethrough and The engaging means of the penetrating rod to be inserted is engageable with the engaging portion, and the engaging means is engaged with the engaging portion by rotating the chuck unit while moving the loading platform up and down. It is characterized in that it is configured to engage with each other.

Further, according to the present invention, a loading platform provided so as to be able to move up and down, a chuck unit rotatably arranged on the loading platform, a drive source section for rotating the chuck unit, and a chuck unit held by the chuck unit. An automatic penetration tester including a penetration rod, wherein the penetration rod has a locking portion, and the chuck unit has a member through which the penetration rod can be inserted and a penetration member through which the member is inserted. Engaging means engageable with the locking portion of the rod, and in the state where the engaging means engages with the locking portion, the engaging means operably supports the engaging means and the engaging means locks the penetration rod. And a means for urging the engaging means so as to be movable toward the penetrating rod when in contact with a surface other than the engaging portion, and the engaging means is in contact with a surface other than the engaging portion of the penetrating rod. Move the loading platform up and down while There also characterized by the fact that said engaging means by rotating the unit was configured to engage by moving the locking part position.

Further, according to the present invention, a penetrating rod for extension is connected to a penetrating rod held by a chuck unit provided on a loading table capable of moving up and down, and the penetrating rod already held by the chuck unit is provided. The engagement between the locking unit and the engaging unit of the chuck unit is released, and the loading unit is moved up and down to move the chuck unit along the penetrating rod and rotate the chuck unit by driving the drive source unit. To move the engaging means to the position of the engaging portion of the extension rod, and engage the engaging means of the chuck unit with the engaging portion of the extension rod to extend the chuck unit. It is also characterized by holding the penetrating rod.

[0009]

In the automatic penetration tester of the present invention, the engaging means engages with the engaging portion of the chuck unit by matching the engaging means of the chuck unit with the engaging portion of the penetrating rod. Can be held. When the penetrating rod is replenished, the loading platform is moved up and down to move the chuck unit to the locking portion provided on the replenishing penetrating rod by the engaging means, thereby holding the replenished penetrating rod in the chuck unit. can do.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 3 and 4, reference numeral 1 denotes an automatic penetration tester, which is roughly classified into a pair of frames 2 placed in parallel, and a loading table 3 which is guided by the frames 2 and is vertically movable.
The drive source unit 4 installed on the loading platform 3 and the loading platform 3 described above.
The chuck unit 5 placed on the top and rotated by the drive of the drive source unit 4, and the torque detection unit 6 arranged on the loading table 3 for detecting the load torque transmitted from the chuck unit 5.
And a speed adjusting unit 7 located on the loading platform 3 for adjusting the ascending and descending speeds of the loading platform 3, and a speed detection unit located on the loading platform 3 for detecting the ascending and descending speeds of the loading platform 3. It is composed of a section 8 and a control section 9 for controlling the operation of each of these sections. Hereinafter, the configuration of each of these parts will be described in detail.

The frame 2 includes two vertical frame members 2a and 2b joined in an inverted T-shape, which are arranged in a row, and the vertical frame members 2a and 2b are arranged in a row. The vertical frame member 2a is formed by joining with a back plate 2c located on the back side of the vertical frame member 2a, and the side surface of the vertical frame member 2a facing outwardly is opened with a constant width over the entire length. It is configured to form a guide path that guides 3 up and down.

A loading table 3 shown in FIGS. 5 to 9 is fitted to the frame 2 so as to be vertically movable. The loading table 3 has a box shape with a hollow inside, and two rollers 3a are rotatably arranged on both side surfaces of the loading table. The vertical frame member 2a of the frame 2 is fitted. Further, on the front surface of the loading platform 3, a weight hanging 3b on which a weight of a predetermined weight is constantly suspended is projected, and the weight hanging 3b is provided with equipment when all parts are arranged on the loading platform 3. The insufficient weight 3c is suspended so that the weight becomes 100 kgf.

The drive source section 4 is arranged at the rear of the loading table 3 described above. In the present embodiment, the drive source unit 4 is a motor, and the following description will be given with the drive source unit 4 as the motor 4. The motor 4 is installed so that the output shaft 4a projects from the upper surface of the loading platform 3, and the output shaft 4a has a first sprocket 4b.
Is rotatably supported integrally.

A torque detector 6 is arranged at the rear of the loading table 3 and adjacent to the motor 4. This torque detector 6
As shown in FIGS. 11 and 12, has a first input shaft 10 protruding from the upper surface of the loading platform 3, and a second sprocket 11 is connected to the upper end of the first input shaft 10 and
The electromagnetic clutch 12 is connected to the lower end. The electromagnetic clutch 12 connects and disconnects two discs (not shown) facing each other with an electromagnet. The first input shaft 10 is connected to one disc, and the other disc is located below the electromagnetic clutch 12. The second input shaft 13a of the planetary gear mechanism 13 located is connected.

This planetary gear mechanism 13 has a second input shaft 13a.
The sun gear 13b connected to the lower end and the sun gear 13b
Three planetary gears 13c that are positioned around b, mesh with them, and are rotatably supported by the output shaft 13d located on the lower surface side, and tooth portions formed on the inner peripheral surface of these planetary gears 13c. And an internal gear 13e that meshes with
On the upper surface side of the internal gear 13e, two springs 14 extending in the tangential direction of the outer periphery thereof and constantly urging the internal gear 13e in one rotation direction are arranged point-symmetrically with respect to the center of the internal gear 13e. Further, a sector-shaped slit plate 15 is also connected to the internal gear 13e. The slit plate 15 is formed with a concavo-convex slit 15a continuously on its arc portion.
Two photoelectric sensors 16 are arranged at predetermined positions at the slit 15a so as to cover the slit 15a. The third sprocket 1 is attached to the lower end of the output shaft 13d.
3f is connected.

A speed adjusting unit 7 is arranged in front of the torque detecting unit 6 described above. As shown in FIG. 10, the speed adjusting unit 7 includes the first input shaft 1 of the torque detecting unit 6.
It has a rotatable first shaft 17 located in front of the first input shaft 10 with an axis line parallel to 0, a fourth sprocket 18 at the upper end of the first shaft 17, and a bevel gear 19 at the lower end thereof. Each is integrally rotatably supported. Below the first shaft 17, a transmission shaft 20 having an axis intersecting with the first shaft 17.
Are rotatably supported by a support base 3d arranged on the loading base 3, and the first end of the transmission shaft 20 is
Bevel gear 1 of the same shape that meshes with bevel gear 19 of shaft 17
9 is fixed rotatably integrally, and a one-way clutch 21 that transmits rotation in only one direction is connected to the other end.

A second shaft 22 coaxial with the transmission shaft 20 is connected to the one-way clutch 21, and a powder brake 23 and a first gear 24 are fitted and fixed to the second shaft 22, respectively. ing. The powder brake 23 is a support base 3
An outer ring 23a fixed to d, an inner ring (not shown) located inside the outer ring 23a, and a powder chamber (not shown) whose volume is changed by a magnetic force by being enclosed in a powder chamber provided between the outer ring 23a and the inner ring And the powder of. The inner ring of the powder brake 23 is rotatably fixed to the second shaft 22 integrally with the second shaft 22.
Inner ring and outer ring 23a due to volume change of powder in
The rotational speed of the second shaft 22 can be controlled by the frictional resistance generated between and.

The second shaft 2 is located diagonally below and in front of the second shaft 22.
A second gear 25 having an axis parallel to the second axis and meshing with the first gear 24, and a third gear 26 having a diameter smaller than the diameter of the second gear 25 are integrally rotatably fixed. The third shaft 27 is disposed, and the third shaft 27 has an axis parallel to the axis of the third shaft 27 diagonally above and in front of the third shaft 27. The third shaft 27 meshes with the third gear 26 of the third shaft 27. There is provided a fourth shaft 30 in which a four gear 28 and a sprocket 29 that meshes with the guide chain 2d in the frame 2 are integrally rotatably fixed. The sprocket 29 is the frame
The chain 2 is engaged with a guide chain 2d that extends vertically to the back plate 2c.

The speed detecting unit 8 is arranged on an extension of the axis of the fourth shaft 30 in the speed adjusting unit 7. As shown in FIGS. 1 and 2, the speed detector 8 is provided with the frame 2
A rack 2e, which is an example of a guide member extending vertically to the back plate 2c, a detection shaft 31 which is coaxial with the fourth shaft 30 and whose both ends are rotatably supported, and this detection shaft. A disk-shaped slit disk 32, which is an example of a pulse generation unit that is rotatably inserted into and integrally fixed to 31, and a rack 2e, which is also rotatably inserted and fixed to the detection shaft 31 integrally like the slit disk 32. The pinion gear 33, which is an example of a rotating portion that meshes with the, and the two photoelectric sensors 34, which are an example of a pulse detecting portion arranged at a predetermined interval on the circumferential portion of the slit disk 32. A concave-convex slit 32a is formed on the entire circumference of the slit disk 32 of the speed detector 8.

A chuck unit 5 is arranged in front of the mounting table 3. As shown in FIG. 13, the chuck unit 5 has a shape that protrudes above and below the loading table.
It has a pedestal 35 attached to its upper surface, and a cylindrical bearing case 36 that hangs down the loading table 3 is connected to the lower surface of this pedestal 35. A cylindrical rotation transmitting sleeve 37 is rotatably disposed inside the bearing case 36 via a bearing, and a fifth sprocket 38 is integrally formed at the lower end of the rotation transmitting sleeve 37. It is rotatably fixed, and a cylindrical relay sleeve 39 is screwed into the upper end so as to rotate integrally. Further, a cylindrical guide sleeve 40 is fixed to the upper surface of the relay sleeve 39, and a spring 5a is fitted around the outer periphery of the guide sleeve 40, and the spring 5a constantly moves upward. A urging cylindrical slide sleeve 41 is inserted.

In the vicinity of the tip of the guide sleeve 40,
Through holes 40a penetrating from the outer circumference to the inner circumference are provided at three places so as to divide the circumference into three parts.
A steel ball 42 is operably housed in each. Further, the guide sleeve 40 has a guide sleeve centered at the tip thereof.
Disk-shaped stopper 4 with a hole of the same diameter as the inner diameter of the sleeve 40
0b is provided so as to project in the outer peripheral direction. Further, the inner peripheral surface of the slide sleeve 41 has an inner hole having a diameter slightly larger than the outer peripheral surface of the guide sleeve 40 formed from the lower surface and a larger diameter continuously formed above the inner hole. A steel which is formed on a stepped inner peripheral surface consisting of an inner hole and which is located in the through hole 40a of the guide sleeve 40 by sliding the slide sleeve 41 downward along the outer periphery of the guide sleeve 40. The ball 42 is constructed so that it can be operated so as not to fall out of the through hole 40a, and a groove 41a is vertically cut inward on the lower surface side.
The head of a stopper screw 40c screwed into the outer periphery of the guide sleeve 40 engages with the groove 41a, and the slide sleeve 41 is rotated to rotate the guide sleeve 40.
Is also configured to rotate together.

A penetrating rod 43 is integrally rotatably held by the chuck unit 5. This penetration rod 4
Reference numeral 3 is a shaft-shaped member having a total length of 1000 mm, and a penetrating body 44 called a screw point is attached to the tip thereof. In this embodiment, this penetrating member 44 is JI.
It is manufactured based on the S type A1221 Swedish sounding test method, and the spiral-shaped spiral groove 44a is formed over the entire length on the outer peripheral surface of the substantially cone-shaped penetrating body 44 having a total length of 200 mm. . An adapter 45 having a total length of 250 mm and made of a shaft material having the same diameter as that of the penetration rod 43 is screwed and coupled to the upper part of the penetration rod 43, and the outer periphery of the adapter 45 is divided into three equal parts to form a locking groove 45a. The guide sleeve 40 is provided with a steel ball 42 into which the steel ball 42 can be fitted, and a male screw 45b is formed on the upper end of the adapter 45 so that another penetration rod 43 can be formed.
Are configured to be connectable.

On the other hand, a cable (not shown) for extracting each speed information is connected to the speed detecting unit 8 and the speed adjusting unit 7, and this cable is connected to the control unit 9. There is. The control unit 9 is configured to process the ascending / descending speed information of the loading platform 3 sent from the speed detecting unit 8 and send an operation command signal to the speed adjusting unit 7. The rotation information of the slit plate 15 sent from the sensor 16 is also converted into a torque value. The control unit 9 is also provided with a printer 9a so that it can output necessary data at the time of a penetration test.

Each of the sprockets in the motor 4, the torque detecting portion 6 and the speed adjusting portion 7, that is, the first sprocket 4b, the second sprocket 11 and the fourth sprocket 18 has a driving chain as shown in FIG. 46 is wound so that the rotational drive of the drive source section 4 is reliably transmitted to each section, and the torque detection section 6 and the third sprocket 13f in the chuck unit 5 are
As shown in FIG. 4, a transmission chain 48 is wound between the fifth sprockets 38 via four relay sprockets 47, and the rotation output from the planetary gear mechanism 13 of the torque detector 6 is provided. Is transmitted to the chuck unit 5.

In the automatic penetration tester 1 of the present invention having the above-mentioned structure, the loading table 3 is lowered, and the penetration source 44 is driven by the drive source portion 4 to rotate while penetrating into the ground.
While detecting the load torque value that the penetrating body receives in the ground, the penetrating speed of the penetrating body 44, that is, the descending speed of the loading platform 3 is strictly controlled to always perform stable penetrating of the penetrating body 44, and it is extremely accurate. This is to carry out a penetration test. In order to make this clearer, the operation of the automatic penetration tester 1 will be described in detail below.

First, the chuck unit 5 is inserted into the penetrating rod 4
Insert 3 from below and hold. The penetrating rod 43 used at this stage has a penetrating body 44 connected to the tip thereof. When holding the penetrating rod 43, first, the slide sleeve 41 of the chuck unit 5 is guided by the guide sleeve.
The steel ball 42 is moved downward in the through hole 40a with the stepped shape of the inner surface of the slide sleeve 41, and then the penetrating rod 43 is inserted into the guide sleeve 40. Guide sleeve near the top of the adapter 45
When the penetrating rod 43 is rotated while the slide sleeve 41 is positioned inside the sleeve 40 and the slide sleeve 41 is opened, the steel ball 42 and the locking groove 45a of the adapter 45 are engaged with each other, and the slide sleeve 41 is accordingly moved. It moves upward by the force of the spring 5a, covers the through hole 40a of the guide sleeve 40 with its inner peripheral surface, and makes the steel ball 42 inoperable to hold the penetration rod 43.

After the holding of the penetrating rod 43 is completed, when a start switch (not shown) in the control unit 9 is pressed, a drive command for the motor 4 is output from the control unit 9 to output the motor.
Data 4 is driven. The drive of the motor 4 is transmitted from the first sprocket 4b of the output shaft 4a to the drive chain 46, and from the drive chain 46 to the second sprocket 11
Is transmitted to the electromagnetic clutch 12 from the first input shaft 10. At this time, the electromagnetic clutch 12 is in a state in which two discs (not shown) are separated, and the rotation is not transmitted to subsequent components, that is, components subsequent to the planetary gear mechanism 13.

On the other hand, the drive of the motor 4 is transmitted to the second sprocket 11 and at the same time to the fourth sprocket 18. The first shaft 17 starts to rotate by the driving of the motor 4 transmitted to the fourth sprocket 18, and the rotation of the first shaft 17 is transmitted to the transmission shaft 20 by the bevel gear 19. At this time, the transmission shaft 20 is rotated. Since the rotation direction transmitted to 20 is a direction in which rotation cannot be transmitted by the one-way clutch 21, rotation is transmitted to parts such as the powder brake 23 connected to the transmission shaft 20 via the one-way clutch 21. Never.

As described above, in a state where the drive of the motor 4 cannot be transmitted midway, the tip of the penetrating body 44 is grounded on the surface of the earth and stands by. At this time, the powder brake 23
Is applied with a voltage that produces the maximum braking force, and this braking force is applied to the sprocket 29 by the second shaft 22, the third shaft 27, and the fourth shaft 30, and the sprocket 29 meshes with the guide chain 2d. The loading platform 3 cannot be lowered because it is stopped in this state. In this state, the control unit 9 outputs a voltage load command to the powder break 23 of the speed adjusting unit 7, the voltage applied to the powder break 23 changes, and the braking force of the powder break 23 weakens. To be As a result, the second shaft 22, the third shaft 27, the fourth shaft
The shaft 30 becomes rotatable, and the loading platform 3 descends along the frame 2 due to its weight.

Since the braking force of the powder brake is weakened, the weight of the loading table acts as a load on the penetrating body 44, which causes the penetrating body 44 to sink to the ground. However,
At this time, the sprocket 29 is attached to the second shaft 22 and the third shaft 2.
7. Since the braking force of the powder brake 23 transmitted by each gear of the fourth shaft 30 is received, the penetrating body 44 does not have the load of 100 kgf which is the weight of the loading platform 3 but 50
A load equivalent to kgf acts, and the penetrating body 44 is
It will stop when it reaches a depth where it can sink with a load of 0 kgf.

When the sinking of the penetrating body 44 is stopped, the voltage applied to the powder brake 23 changes again. At this time, the voltage applied to the powder brake 23 is
Is a voltage generated by the powder brake 23, which produces a braking force corresponding to a load of 75 kgf. The change in this voltage causes the penetrator 44 to sink further into the ground,
It stops when it reaches a depth where it can sink with the load of f.

When the sinking of the penetrating body 44 is stopped by the load of 75 kgf, the supply of the voltage to the powder brake 23 is subsequently stopped. As a result, the braking force of the powder brake 23 disappears, a load of 100 kgf, which is the original equipment weight of the loading platform 3, acts on the penetrating body 44, and the penetrating body 44 starts sinking again into the ground to reach 100 kgf. It stops when it reaches the depth where it can sink with the load of.

As described above, while the braking force of the powder brake 23 is changed in three steps and the penetrating body 44 is sunk into the ground, the pinion gear 33 of the speed detecting section 8 is moved by the downward movement of the loading table 3 while the sinker 44 descends. Since it rotates along the rack 2e of the frame 2, the detection shaft 31 and the slit disk 32 also rotate accordingly, and the rotation of the slit disk 32 causes the photoelectric sensor 34 to detect a pulse. This detection pulse is converted into the penetration amount of the penetrating body in the control unit 9, and based on this, the penetration speed for each predetermined penetration amount is divided from the time per unit number of pulses measured by a timer (not shown) in the control unit 9. Will be issued.

When the sinking of the penetrating body 44 is stopped by the load of 100 kgf, the electromagnetic clutch 12 in the torque detecting portion 6 is stopped.
Operates to transmit the rotation of the motor 4 to the planetary gear mechanism 13. The rotation input to the planetary gear mechanism 13 is 1 / here
After the speed is reduced to 4, the output shaft 13d outputs the third sprocket 13f. The rotation output to the third sprocket 13f is further transmitted to the fifth sprocket 38 in the chuck unit 5 by the transmission chain 48, whereby the rotation transmission sleeve 37 and the relay sleeve 3 are provided.
9, the guide sleeve 40 and the slide sleeve 41 start rotating. Along with this, the chuck unit 5
The penetrating rod 43 held at the position also starts to rotate, and the penetrating body 44 stopped in the ground starts to penetrate into the ground again by rotating.

When the penetrating body 44 starts to penetrate into the ground while rotating, the rotating load torque from the soil acts on the penetrating body 44, and this rotating load torque is transmitted from the penetrating rod 43 to the chuck unit 5 and further. It reaches the planetary gear mechanism 13 via a transmission chain 48. At this time, since the internal gear 13e in the planetary gear mechanism 13 is in a semi-fixed state supported by the spring 14, when the rotational load torque is transmitted from the sun gear 13b to the internal gear 13e via the planetary gear 13c. The internal gear 13e rotates while compressing the spring according to the rotational load torque value. This internal gear 1
The slit plate 15 also rotates with the rotation of 3e, and a considerable amount of pulses are detected from the photoelectric sensor 16 according to the movement of the slit 15a due to the rotation of the slit plate 15. This detection pulse is sent to the control unit 9 and converted into a torque value.

Further, after the penetrating body 44 starts to penetrate into the ground while rotating, it is measured by a timer (not shown) based on the penetration amount obtained by the pulse from the slit disk 32 in the control section 9. The penetration speed for each predetermined penetration amount is continuously calculated from the time per unit pulse number, and the number of rotations of the penetrating body 44 during the predetermined penetration amount is also calculated from the time per unit pulse number. . The above-mentioned torque value measurement is performed for each predetermined penetration amount.

When the penetrating body 44 penetrates into the ground by the rotational force, if the penetrating speed exceeds a predetermined value, the electromagnetic clutch 12 is disengaged and the rotation transmission from the motor 4 to the planetary gear mechanism 13 is cut off. Then, the rotation of the penetrating rod 44 is stopped.
At the same time, a voltage is applied to the powder brake 23,
With this voltage load, the powder brake 23 generates a braking force such that the load exerted on the penetrating body 44 by the loading table 3 becomes 75 kgf. If the sinking of the penetrating body 44 is not stopped by this, the load voltage of the powder break 23 is further increased, and the powder break 23 generates a braking force such that the load exerted by the loading platform 3 on the penetrating body is 50 kgf. To do. Penetration body 4
When the sinking of No. 4 is stopped, the penetration of the penetration body 44 is performed again from the above-described penetration operation that does not rotate the penetration body 44. When the penetration speed of the penetrating body 44 becomes slower than a predetermined value,
The penetration of the penetration body 44 is stopped at that position, and a buzzer (not shown) is activated.

The penetration test using the automatic penetration tester 1 is carried out up to about 15 m in the ground. Therefore, during the penetration test, the penetration rod 43 must be extended several times to extend the penetration rod 43. When the loading platform 3 reaches the preset bottom dead center during the penetration work, the operation of the automatic penetration tester 1 is stopped at that position first.

After that, a new penetrating rod 43 is screwed into the upper end of the penetrating rod 43 held by the chuck unit 5, the slide sleeve 41 of the chuck unit 5 is lowered along the guide sleeve 40, and 30 °
The slide sleeve 40 is rotated. By rotating the slide sleeve 41, the stopper screw 40c of the guide sleeve 40 is moved to the groove 41a of the slide sleeve 41.
Since the guide sleeve 40 also rotates because it is engaged with, the steel ball 42 fitted in the locking groove 45a of the adapter 45 disengages from the locking groove 45a, and the adapter 45
The non-molded outer peripheral surface of the locking groove 45a is abutted.
In this state, the steel balls 42 project from the outer peripheral surface of the guide sleeve 40 as shown in FIG.
The stepped inner peripheral surface of the bump 41 is locked to the protruding portion of the steel ball 42. Therefore, even if the force pulling the slide sleeve 41 downward is released, the slide sleeve 41 stops at that position.

Subsequently, when the motor 4 is driven in the direction opposite to that in the original penetration test, this rotation causes the first sprocket 4b,
It is transmitted to the first shaft 17 via the drive chain 46 and the fourth sprocket 18, and is transmitted from the first shaft 17 to the transmission shaft 20 via the bevel gear 19. At this time, since the motor 4 is driven in reverse, the one-way clutch 21 transmits the rotation, and the rotation of the transmission shaft 20 is transmitted to the second shaft 22, the third shaft 27, and the fourth shaft 30, and the sprocket. 29 for guidance
Rotate along 2d. This makes the loading platform 3
Starts climbing along frame 2.

At this time, since the electromagnetic clutch 12 is disengaged, the chuck unit 5 does not rotate, and no voltage is applied to the powder break 23.
When the loading platform reaches a predetermined position, it is stopped by the braking force of the powder brake 23. This stop position is near the position where the guide sleeve 40 of the chuck unit 5 is located near the locking groove 45a of the adapter 45 of the new penetration rod 43.
At the same time when the lifting of the loading platform 3 is stopped, the drive of the motor 4 is switched to the normal drive, and at the same time the electromagnetic clutch 12 is activated to transmit the drive of the motor 4 to the chuck unit 5.

As a result, the chuck unit 5 rotates, the steel ball 42 fits into the locking groove 45a of the adapter 45 as the chuck unit 5 rotates, and the slide sleeve 41 moves upward due to the spring force. Then, the through hole 40a of the guide sleeve 40 is covered with the inner peripheral surface, the operation of the steel ball 42 is sealed, and the connection of the new penetrating rod 43 is completed.
The subsequent penetration test is continued from the state before the addition of the penetration rod 43, and the penetration rod 43 is repeatedly added, and when the penetration body 44 reaches the target penetration amount, the penetration test is terminated at that time.

While the work of adding the penetration rod 43 is being performed, the printer 9a of the control unit 9 outputs the test data up to that point. This test data indicates the torque value at a predetermined penetration amount, the number of rotations of the penetration member 44 between the predetermined penetration amounts, and the number of rotations of the penetration member 44 per 1 m calculated from the number of rotations of the penetration member 44 between the predetermined penetration amounts. The data is output in a summarized table format, and after completion of the penetration test, the operator determines the soil quality at the specified penetration amount from these data.

[0044]

According to the present invention, the penetrating rod can be automatically held by the chuck unit, and the penetrating rod can be held quickly and easily. In addition, when the extension rod is extended and the extension rod is held by the chuck unit, there is an advantage that this can be easily performed.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of an essential part of a speed detection unit in an automatic penetration tester according to the present invention.

FIG. 2 is a sectional view taken along line BB of FIG.

FIG. 3 is a side view of the automatic penetration tester according to the present invention.

FIG. 4 is a rear view of the automatic penetration tester according to the present invention.

FIG. 5 is an enlarged plan view of a loading table in the automatic penetration tester according to the present invention.

FIG. 6 is an enlarged bottom view of the loading platform in the automatic penetration tester according to the present invention.

FIG. 7 is an enlarged plan view showing the internal structure of the loading platform in the automatic penetration tester according to the present invention.

FIG. 8 is an enlarged side view showing the internal structure of the loading platform in the automatic penetration tester according to the present invention.

FIG. 9 is an enlarged side view showing the internal structure of the loading platform in the automatic penetration tester according to the present invention.

FIG. 10 is an enlarged cross-sectional view of a main part of a speed adjusting unit in the automatic penetration tester according to the present invention.

FIG. 11 is an enlarged cross-sectional view of a main part of a torque detection unit in the automatic penetration tester according to the present invention.

12 is a cross-sectional view taken along the line AA of FIG.

FIG. 13 is an enlarged sectional view of a main part of a chuck unit in the automatic penetration tester according to the present invention.

FIG. 14 is an enlarged sectional view of an essential part of a chuck unit in the automatic penetration tester according to the present invention.

FIG. 15 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 Automatic penetration tester 2 frames 3 loading platform 3c weight 4 Drive source section (motor) 5 Chuck unit 6 Torque detector 7 Speed adjustment unit 8 Speed detector 9 control unit 12 Electromagnetic clutch 13 Planetary gear mechanism 14 springs 15 slit plate 17 1st axis 21 one-way clutch 22 Second axis 23 Powder Break 27 Third axis 29 sprockets 30 Fourth axis 31 detection axis 32 slit disc 33 Pinion Gear 34 Photoelectric sensor 40 guide sleeve 40a through hole 41 slide sleeve 42 steel ball 43 Penetration rod 44 Penetration body 45 adapter 45a locking groove 46 drive chain 48 transmission chain

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Claims (3)

(57) [Claims] 1. A loading platform that is vertically movable, a chuck unit that is rotatably disposed on the loading platform, a drive source section that rotates the chuck unit, and a penetrating rod that is held by the chuck unit. An automatic penetration tester equipped with: the penetration rod having a locking portion, and the chuck unit.
Is the insert configured so that it can be inserted through the penetration rod?
Can be engaged with the locking portion of the penetrating rod that is inserted therethrough
It comprises an engaging means, which engages the luggage carrier described above.
Rotate the chuck unit while moving up and down
Configured to engage and engage the locking portion
Automatic penetration tester, characterized by that. 2. A loading platform that is vertically movable, a chuck unit that is rotatably disposed on the loading platform, a drive source unit that rotates the chuck unit, and a penetrating rod that is held by the chuck unit. An automatic penetration tester equipped with: the penetration rod having a locking portion, and the chuck unit.
This unit has a member through which the penetration rod can be inserted and
Can be engaged with the locking portion of the penetrating rod that passes through the member
Engaging means and a state in which the engaging means engages with the locking portion
Supports the engaging means inoperable and allows the engaging means to penetrate.
Engage the engaging means when it is in contact with the surface of the lid other than the locking part.
A means for movably urging the rod side, wherein the engaging means is in contact with a surface other than the engaging portion of the penetrating rod.
In the state, the loading platform is moved up and down and the chuck unit is
Rotate the door to move the engaging means to the locking position
The automatic penetration tester is characterized in that it is configured to be engaged with each other . 3. A chuck provided on a loading table that can be moved up and down.
The extension rod to the extension rod held by the unit
Connecting the rods, setting the penetration rod that is already held by the chuck unit
Engagement of the latched locking portion with the engaging means of the chuck unit
The chuck unit and lift the loading platform to move it up and down.
Of the chuck rod along with the penetrating rod.
Engagement by rotating by the driving of the drive unit knitwear
Move the coupling means to the position of the locking part of the extension rod for extension
Is allowed, penetration rod for extending the engagement means of the chuck unit
To the chuck unit by engaging the locking part provided on the
A penetration lock characterized by holding a long penetration rod.
How to hold the code.