JP4028823B2 - Column fixing device in automatic penetration testing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is an automatic penetration testing machine that measures the basic data of the ground in order to know the ground strength of the ground. Assembling and disassembling of each unit of the testing machine is facilitated so that the loading and unloading of the testing machine at the site of use becomes easy. It is related with the support | pillar fixing device which made easy.
[0002]
[Prior art]
Conventionally, when building various types of structures, it is extremely important to investigate the geology of the ground of the land and to know the ground strength of the land, and such ground geology is generally investigated by conducting a boring test. However, in the case of building a small building such as the former stage or a house, a penetration test is conducted for a depth of up to about 15 m as a simple geological survey. In this penetration test, various types of penetration testing machines that use the weight of the weight and the rotational force to the rod to penetrate into the ground are used. As shown in FIG. And a lifting unit 3 capable of loading a weight of a predetermined weight. The lifting unit 3 is provided with a chuck portion 7 for holding the rod 35 and a rotational drive source such as a motor 33 for rotationally driving the chuck portion 7. At the time of the penetration test, a weight of a predetermined weight is loaded on the lifting unit 3 and a load is applied to the rod 35, and the rod 35 held by the chuck portion 7 is rotated into the ground by driving the rotary drive source. The number of rotations of the rod 35 required to penetrate the predetermined depth and the load applied at that time are measured every predetermined depth unit.
[0003]
When such a tester is brought into the site, the operator usually carries it in, but the weight of the tester is heavy, especially when the tester is transported through a narrow passage where a car cannot enter. It is the present situation that it is disassembled and carried every time. In this carrying-in operation, the base of the penetration tester and the column are separated from each other because of excessive weight and length (for example, refer to Patent Document 1). As a means, a column is fitted to a column fixing member fixed to the base, and this is assembled by fixing it with a bolt and a nut.
[0004]
[Patent Document 1]
Japanese Patent No. 3066287 [0005]
[Problems to be solved by the invention]
However, when fixing the column to the column fixing member on the base with bolts in this way, the bolt or nut protrudes to the outside, so if you try to fit the lifting table etc. to this column and move it, The protruding bolts or nuts obstructed the movement range of the lifting platform. Further, if these bolts and nuts are loosened even slightly due to vibration, impact, etc., the support column may be shaken by the up-and-down movement of the lifting platform, and the penetration action of the penetration rod into the ground may not be obtained. Furthermore, when fixing the support to the support fixing member, it is necessary to search for a hole through which the bolt penetrates.For this purpose, it is necessary to move the support up and down with respect to the support fixing member, or to support it at a matching position. There are problems such as fatigue of workers.
[0006]
An object of the present invention is to solve the above-mentioned problems, and to easily assemble and dismantle and to make effective use of a column.
[0007]
[Means for Solving the Problems]
An object of the present invention is to provide an elevating unit (3) that can be moved up and down along a column (20) fixed to a base (2), and to freely rotate a rod (35) that penetrates the elevating unit into the ground. In the automatic penetration testing apparatus configured to be held, a support block (10) fixed to the base is provided with a pressing block (11) that can be moved in and out with respect to the outer peripheral surface thereof, and the pressing block is attached to the tip. the propulsion bolt strut fixing member so as to move in directions perpendicular to the center line of the strut fixing member together by screwing (15), whereas, extrapolating the strut of the hollow shape to the strut fixing member, the A strut fixing device in which the propulsion bolt is advanced to press the inner peripheral surface (21) of the strut and the strut and the strut fixing member are integrally fixed. The pressing block is opposed to this. Support It has a pin (18) at a position that coincides with the locking hole (22) formed on the surface, and this pin is inserted into the locking hole when the pressing block presses the inner peripheral surface of the column. This is accomplished by providing a strut fixing device configured to be provided.
[0008]
[Means for Solving the Problems]
Further, Oite to this configuration, the pressing block because they are engaged with the front end of the propulsion bolts, press block along the inner peripheral surface of the strut can abut.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 4, reference numeral 1 denotes an automatic penetration tester, which includes a base 2 composed of two bases arranged in parallel and a plate (not shown) connecting them at an intermediate position thereof, and The column 20 is provided with a vertical column 20, a lifting unit 3 that can be moved up and down along the column 20, and a control unit (not shown) that controls each drive part. There are various types of penetration tests, such as standard penetration tests and Dutch cone penetration tests. The automatic penetration testing machine described in this embodiment is called a Swedish sounding test defined in JIS (Japanese Industrial Standards) A1221. Is. In this testing machine, as shown in FIG. 1, the support column 20 is detachably erected on the plate of the base 2, and the support column 20 is attached to a support column fixing member 10 fixed upright on the plate. It is inserted.
[0010]
As shown in FIGS. 2 and 3, the support fixing member 10 has a hollow pipe shape in which the transverse inner peripheral surface is similar to the transverse outer peripheral surface of the support fixing member 10 with respect to its axis. A square pipe-shaped support column 20 having a peripheral surface shape is extrapolated and fixed. A window-like opening 12 is formed on one surface of the support fixing member 10 so that the pressing block 11 can be moved in and out so as to move in a direction orthogonal to the center line of the support fixing member 10. Both side walls on both sides are extended by the width and are slightly removed. The opening 12 guides the movement of the pressing block 11 when it moves in and out from the center side of the column fixing member 10. The pressing block 11 is fixed to both ends of the opening 12. It is engaged with a propulsion bolt 15 screwed into a support member 13 having a screw hole 14 formed in the center thereof. When the pressing block 11 is retreated, its end surface is retracted so as to be inside the outer peripheral surface of the column fixing member 10, and when it is advanced, its end surface presses the inner peripheral surface 21 of the column 20. It has become.
[0011]
On the other hand, the rear end of the propulsion bolt 15 is positioned within the column fixing member 10, and the rear end is formed with a hexagonal drive hole 16 for transmitting rotation for moving the bolt 15 back and forth. ing. The drive hole 16 may be a polygonal hole other than a hexagonal shape or a − + shaped groove. The propulsion bolt 15 is disposed orthogonal to the center line of the support fixing member 10, and the pressing block 11 is fitted into a locking portion 17 formed at the tip of the propulsion bolt 15 to move back and forth. It is like that. Pins 18 are planted on both sides of the pressing block 11 with the locking portions 17 therebetween, and the pins 18 are locking holes 22 formed in the surface of the support column 20 facing the pressing block 11. When the pressing block 11 moves forward and presses and fixes the inner peripheral surface 21 of the support column 20, it is inserted, and when the pressing block 11 moves backward and retracts into the support column fixing member 10, it comes off. Even if the pressing force of the pressing block 11 that fixes the column 20 inside decreases and a slight looseness occurs, the column 20 is supported. Further, a through hole 23 is formed in the column fixing member 10 and the column 20 positioned on the rear side of the extension line of the propulsion bolt 15, and a tool (not shown) that engages with the bolt 15 can be inserted. Yes.
[0012]
Further, as shown in FIG. 4, the guide column 4 is formed on both side surfaces of the support column 20 fixed to the base 2 in this manner, and a guide as a meshing member is provided on the back surface of the support column 20. The chain 5 is arranged and fixed along the longitudinal direction of the column 20. The elevating unit 3 is disposed on the support column 20, and the elevating unit 3 includes an elevating table 6 that can be moved up and down along the support column 20, and a chuck portion 7 attached to the elevating table 6. A position detection sensor (not shown) for detecting an upper limit position and a lower limit position that accompany the raising and lowering of the lifting platform 6 is attached to the rear portion of the lifting platform 6.
[0013]
The elevating unit 3 has a first motor 30 at the rear of the elevating platform 6, and an elevating transmission system 31 including a speed reduction mechanism (not shown) on the output shaft (not shown) of the first motor 30. The rotation of the first motor 30 is transmitted via this. The first motor 30 is provided with a lock mechanism (not shown) that can be driven in forward and reverse rotations and that fixes the output shaft to be non-rotatable when stopped. Further, the lifting transmission system 31 is provided with a brake means capable of adjusting the brake resistance by changing the current, whereby the lifting resistance is applied to the lifting transmission system 31.
[0014]
A one-way clutch (not shown) is interposed in the lift transmission system 31, and the one-way clutch is connected only when the lift unit 3 is lifted by driving the first motor 30, and the lift transmission sprocket 32. The one-way clutch is disengaged when the elevating unit 3 is lowered. A second motor 33 serving as a chuck rotation drive source having a speed reduction mechanism (not shown) is disposed on the lifting platform 6 to which the chuck unit 7 is attached. Two motors 33 are rotatably connected and installed. The second motor 33 is configured to transmit rotation to the chuck portion 7 when the screw point 34, which will be described later, is driven to rotate in a direction to be screwed into the ground, and to block the rotation when penetrating by its own weight. A clutch part (not shown) is interposed between the second motor 33 and the chuck part 7 as power on / off means.
[0015]
A rod 35 is detachably inserted and held in the chuck portion 7 during the penetration test, and the rod 35 can be added. In the rod 35, the tip first penetrating into the ground is right-twisted with a pyramid-shaped material, thereby forming a groove shape in a cross-section perpendicular to the ridge line of the twist, and a groove shape over the entire length. The so-called spiral groove is formed and screw points 34 that define the screwing direction are screwed together.
[0016]
When a penetration test is performed by the automatic penetration testing machine 1, a unit obtained by unitizing each element of the testing machine is carried to the measurement site. At this time, the propulsion bolt 15 having the pressing block 11 locked at the tip is screwed to the support member 13 of the column fixing member 10 fixed to the base 2 in advance, and the propulsion bolt 15 is retracted in this state. The pressing block 11 enters the outer peripheral surface of the column fixing member 10 and is fixed to the support member 13. Then, in the field, the support column 20 is fitted along the outer peripheral surface of the support column fixing member 10 and extrapolated, the positions of the locking holes 22 of the support column 20 and the pins 18 are matched, and the support column fixing member 10 and the support column 20 are opened. The propulsion bolt 15 is moved forward by engaging a rotary tool such as a hexagon wrench or a hexagon driver bit with the drive hole 16 of the propulsion bolt 15 from the through hole 23.
[0017]
Thereby, as shown in FIG. 2, the pressing block 11 starts to protrude from the opening 12 and abuts against the inner peripheral surface 21 of the support column 20. At this time, since the locking hole 22 of the support column 20 and the pin 18 coincide with each other, the pin 18 enters the locking hole 22 when the pressing block 11 moves forward, and subsequently, on the inner peripheral surface 21 of the support column 20. The pressing force of the pressing block 11 is applied, and the column 20 and the column fixing member 10 are stretched by the pressing block 11 and are integrally fixed.
[0018]
In this way, a unit such as the lifting unit 3 and the chuck unit 7 constituting the automatic penetration testing machine is assembled to the support column 20 fixed upright on the base 2 to assemble the testing machine and electrically connect the control unit. The penetration test can be performed by attaching the penetration rod 35 having the screw point 34 fixed to the tip to the chuck portion 7. In this way, even if the pressing block 11 fixing the support column 20 is loosened for some reason while the penetration test is being repeated, the support column 20 is supported by the pin 18 in the locking hole 22 of the support column 20. Therefore, the base 2 and the column 20 can be integrated by simply tightening the propulsion bolt 15 again in this state.
[0019]
【The invention's effect】
As will be apparent from the embodiment described above, the automatic penetration test in which the rod 35 penetrating into the ground is rotatably held in the lifting unit 3 that can be lifted and lowered along the column 20 of the base 2. In the machine, a support block 11 of the base 2 is provided with a pressing block 11 that can be projected and retracted with respect to the outer peripheral surface, and the pressing block 11 moves in a direction orthogonal to the center line of the support fixing member 10. The propulsion bolt 15 is screwed to the fixing member 10, while the prop 20 is extrapolated to the prop fixing member 10, and the pressing block 11 presses the inner peripheral surface 21 of the prop 20 by the advancement of the propulsion bolt 15. Since it is a column fixing device that integrally fixes the column fixing member 10, bolts or nuts do not protrude outward from the column outer peripheral surface as in the prior art, and ascend and descend along this column. It is eliminated to limit the range of movement of the lift unit that. Further, since the fixing of the support fixing member and the support is only performed by pressing the pressing block on the inner surface of the support, the working time required for the fixing work can be shortened and reliable fixing can be obtained.
[0020]
Further, since the inner circumferential surface of the support column 20 with respect to the axis thereof is similar to the outer peripheral surface of the support shaft fixing member 10 with respect to the axis line, the support column on the inner peripheral surface having a slight gap is extrapolated during fixing. This makes it easy to fit, and positioning with the column becomes easy. Further, the pressing block 11 has a pin 18 at a position corresponding to a locking hole 22 formed on the surface of the support column 20 facing the pressing block 11, and the pressing block 11 presses the inner peripheral surface 21 of the support column 20. At this time, since the pin 18 is inserted into the locking hole 22, even if the fixing device is slightly loosened due to some action such as vibration or impact, the column is not displaced. Even if the propulsion bolt is loosened for some reason and the pressing force of the pressing block is lowered, the support is supported by the pin, so that it is difficult for vertical displacement to occur. In addition, when moving the test machine to the next location, the operator supports a handle (not shown) that is fixed to the prop when the prop is suspended and moved, or a tire (not shown) is attached to the machine base. In this case, when the test machine is moved, the pins prevent the columns from being detached from the column fixing members, so that safety is improved. In addition, since the pressing block 11 is engaged with the tip of the propulsion bolt 15, the pressing block can be brought into contact with the inner surface of the support column accurately, and there is a specific effect such as reducing the fatigue generated when the worker is assembled. .
[Brief description of the drawings]
FIG. 1 is a schematic cross-sectional front view of an essential part showing an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view taken along line AA of FIG. 1 excluding a guide chain.
FIG. 3 is an enlarged cross-sectional view similar to FIG. 2 showing a state in which the support and the support fixing member are released.
FIG. 4 is an overall schematic front view of an automatic penetration testing machine.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Automatic penetration test machine 2 Base 3 Elevating unit 4 Guide path 5 Guide chain 6 Elevating base 7 Chuck part 10 Prop fixing member 11 Pressing block 12 Opening part 13 Support member 14 Screw hole 15 Driving bolt 16 Driving hole 17 Locking part 18 Pin 20 Post 21 Inner peripheral surface 22 Locking hole 23 Through hole 30 First motor 31 Lifting transmission system 32 Lifting transmission sprocket 33 Second motor 34 Screw point 35 Rod

Claims (2)

An automatic penetrating structure in which an elevating unit (3) that can be moved up and down along a column (20) fixed to the base (2) is provided, and a rod (35) that penetrates into the elevating unit is rotatably held. In the test equipment,
The retractable pressing block (11) provided with respect to the outer peripheral surface of this strut fixing member fixed to said base (10), with respect to the center line of the strut fixing member together when attaching the pressing block to the tip Promotion bolt strut fixing member so as to move in a direction perpendicular to screwing (15) Te, while extrapolating the strut of the hollow shape to the strut fixing member, a pressing block by advancing the propulsion bolts A strut fixing device that presses the inner peripheral surface (21) of the strut and integrally fixes the strut and the strut fixing member,
The pressing block has a pin (18) at a position coinciding with a locking hole (22) formed on the surface of the supporting column facing the pressing block, and the pressing block presses the inner peripheral surface of the supporting column. In addition, the post fixing device is characterized in that the pin is inserted into the locking hole.   The strut fixing device according to claim 1, wherein the pressing block is engaged with a tip of the propulsion bolt.

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