JP2919382B2 - Penetration testing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the investigation of the ground at the site when building buildings such as ordinary houses, apartments and condominiums, or when performing civil engineering works such as roads, bridges and embankments. More particularly, the present invention relates to a penetration test machine which can easily and easily investigate the position (depth) of a base (a hard layer such as a bedrock or a gravel layer).

[0002]

2. Description of the Related Art Generally, when constructing a building such as a house or an apartment, a ground survey (for example, a survey for measuring the depth of a rock bed) at the place is usually performed, and a foundation work corresponding to the ground is carried out. And then build the building.

[0003] Conventionally, ground survey methods include boring (rotary boring, impact boring, and washing boring, etc.) in which a deep hole having a diameter of about 60 to 300 mm is dug into the ground using an excavator. BACKGROUND ART Underground exploration (electrical resistance underground exploration and elastic wave underground exploration) for examining the change and structure of the stratum by utilizing the difference in the physical properties of the constituent rocks and soil is widely used. Each of these investigation methods has the advantage that the depth of the bedrock and the properties of the stratum can be accurately investigated.

[0004] However, each of the above-mentioned survey methods requires large-scale machines, equipment, survey equipment, and the like, and has a drawback in that the equipment cost and the survey cost are greatly increased.

On the other hand, in addition to each of the above-mentioned inspection methods, a penetration test method (sounding) for inspecting the ground using a relatively simple penetration tester has been developed and widely used.
This method is mainly used to check the depth of a base (hard layer such as bedrock and gravel layer) when building a building.

More specifically, as shown in FIG. 13, the penetration tester has a plurality of rods each having a fixed length (1 m) having ends thereof detachably screwed and a scale (not shown) formed on an outer peripheral surface. 60, a knocking block 61 positioned between the rods 60, which is detachably screwed, and a fixed weight (10 kg) having a handle 62, which is slidably fitted to the uppermost rod 60 and is provided with a handle 62. ), A conical drill 64 detachably screwed to the tip of the lowermost rod 60, and a stopper for the monken 63 connected to the upper end of the uppermost rod 60. And a positioning block 65.

[0007] In order to investigate the depth of a base (hard layer such as bedrock or gravel layer) using the penetration tester, first, a rod 60 having a drill 64 connected to the tip side is attached to a knocking block 61. At the same time, the rod 60 fitted with the Monken 63 is connected to the knocking block 61.

Next, the drill 64 is pushed up on the ground to hold the rod 60 in a vertical position with respect to the ground. In this state, the monken 63 is stopped along the rod 60 and the position of the retaining / positioning block 65 (knocking block) is set. The height is raised to a height of 50 cm from the upper end surface of the cartridge 61), and the monken 63 is freely dropped from that position (see FIG. 14). Then, the monken 63 collides with the knocking block 61,
The rod 60 fixed to the knocking block 61 is driven into the underground A by the impact at this time.

Then, the knocking block 61 is hit many times by the monken 63 in the same manner as described above, and the rod 6
0 is sequentially driven into the underground A (see FIG. 15).

When the lowermost rod 60 is substantially driven into the underground A, as shown in FIG.
And continue driving it into the underground A.
That is, the connection between the rod 60 driven into the ground A and the knocking block 61 is disconnected, and the lower end of the new rod 60 is moved to the upper end of the rod 60 driven into the ground A.
Also, the upper end of the new rod 60 is
1 and the knocking block 61 is hit by the monken 63 in the same manner as described above, and the newly connected rods 60 are sequentially driven into the underground A.

In this manner, the rods 60 are sequentially driven into the underground A while connecting the rods 60, and when the rods 60 do not enter the underground A, the drill 64 at the tip of the rod 60 reaches the base such as a bedrock. It will be done. At this time, the depth of the base can be known by reading the number of rods 60 driven into the ground A and the scale of the rods 60 projecting from the ground to the ground. Also, measuring the amount of penetration of the rod 60 driven by one impact,
Alternatively, if the number of hits required to drive the rod 60 into the ground A by a certain length (for example, 30 cm) is measured,
From these, the properties of the ground into which the rod 60 is driven can be roughly determined.

[0012]

By the way, when the above penetration tester is used, it is necessary to manually lift the heavy monken 63 tens or hundreds of times.
There was a problem that it took a lot of labor and time to investigate the ground. In particular, when surveying many places or when the ground is hard, the number of hits becomes extremely large, and the above problem is further promoted. Of course, when the first rod 60 starts to be driven into the underground A (when the drill 64 is pushed to the ground) or when a new rod 60 is added, the position of the monken 63 becomes considerably high. , I have to lift Monken 63 from this position to a higher position,
There was also a problem that the lifting work of the Monken 63 was extremely difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to make it possible to easily and easily perform a ground survey without requiring much labor and time. To provide a testing machine.

[0014]

In order to achieve the above object, a penetration tester according to a first aspect of the present invention comprises a rod which is vertically driven into the ground and whose lower end has a freely connectable end. together and it can be detachably connected in portrait orientation, the bunch
A box-shaped case body to which hands are attached , and a striking position which is provided to be vertically movable within the case body and is indirectly struck by a vertically oriented rod connected to the lower end of the case body, and a fixed upward from this position. A hammer that can take a drop start position separated by a distance and a hammer lifting mechanism that is provided on the case body and lifts the hammer at the hitting position to the drop start position and allows the hammer to fall freely at this position.
The hammer lifting mechanism is provided in the case body.
With openable fingers to grab the hammer
Finger mechanism provided in the case body
A cam mechanism for opening the fingers of the frame and a case body
The screw shaft provided at
To move the finger mechanism up and down along the screw axis.
And a finger mechanism by the drive mechanism.
And move the hammer at the impact position to the finger machine.
Grab it with your finger and lift it to the drop start position.
The finger of the finger mechanism is moved by the cam mechanism at the position
The hammer is configured to drop freely by opening operation .

A penetrating tester according to a second aspect of the present invention is provided with a stand provided on the ground and having a column in a vertical position, and supported on the column of the stand so as to be able to move up and down. together and can be detachably connected by vertical orientation to the lower end ends is a universal rod linkage driven into, bunch
A box-shaped case body to which hands are attached , and a striking position which is provided to be vertically movable within the case body and is indirectly struck by a vertically oriented rod connected to the lower end of the case body, and a fixed upward from this position. A hammer that can take a drop start position separated by a distance and a hammer lifting mechanism that is provided on the case body and lifts the hammer at the hitting position to the drop start position and allows the hammer to fall freely at this position.
Then, the stand supports the case body by manual operation.
A lifting operation mechanism for lifting along the
The hammer lifting mechanism is provided inside the case
Finger mechanism with openable fingers for gripping
And the fin of the finger mechanism provided in the case body
The cam mechanism that opens the gar and the screw provided on the case body
By rotating the axis forward and reverse with a servo motor
A drive mechanism that moves the finger mechanism up and down along the screw axis
The finger mechanism is moved up and down by the drive mechanism.
The hammer at the strike position with the fin of the finger mechanism.
Hold it with a gar and lift it to the drop start position.
Release the finger of the swinger mechanism using the cam mechanism.
The hammer is configured to fall freely .

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing an example of a penetration tester of the present invention. The penetration tester includes a stand 1, a case main body 2, a hammer 3, a hammer lifting mechanism 4, and the like, and connects a rod 5 thereto. It is designed to be driven into the underground A.

Each rod 5 driven into the underground A is
It is formed by a steel round bar (diameter 19 mm, length 1 m) having a scale (not shown) engraved on the outer peripheral surface. Are detachably connected. Further, each rod 5 has a male screw 5a formed at one end thereof and a female screw 5b having the same diameter as the male screw 5a formed at the other end thereof.
The ends of the rods 5 can be detachably connected to each other.

As shown in FIGS. 1 and 2, the stand 1 has a rectangular base 7 (a side of 500 mm in length) formed with a cutout 7a through which the rod 5 can pass. A pair of support columns 8 that are opened and opposed to each other.
(Height: 1800 mm, outer diameter: 20 mm), supported by both columns 8 so as to be able to move up and down, and a plurality of steel plates 9 a and block members 9.
The support 9 includes a support 9 composed of a b and a bush 9c, and a lifting operation mechanism 10 that raises the support 9 along the column 8 by manual operation.

As shown in FIGS. 1 and 2, the lifting operation mechanism 10 rotatably supports a rack 8a formed on one of the columns 8 and a support 9 via a rotating shaft 11 and a bearing (not shown). And a gear 12 meshing with the rack 8a and a handle 13 fixed to the rotating shaft 11.
By rotating the support 3 in a predetermined direction (counterclockwise direction in FIG. 1), the support 9 can be raised. Further, when the support 9 is raised to the upper end position of the column 8, it can be prevented from being lowered by the stopper pin 14 which is detachably inserted into the upper end of the column 8. The height position of the support 9 at this time is selected so that the rod 5 to which the drill 6 is connected can be inserted between the lower end of the case main body 2 to be described later connected and fixed thereto and the ground. Further, a rotary encoder 15 for detecting the rotation angle and the number of rotations of the rotating shaft 11 is attached to the support 9, and the rotary encoder 15 is connected to a control panel (not shown) for driving and controlling the penetration tester. ing.

In FIGS. 1 and 2, reference numeral 16 denotes an anchor for fixing the base 7 to the ground at the four corners of the base 7, and reference numeral 7 denotes a tip of the support 9 (left side in FIG. 1). It is a lock pin that is detachably inserted and that connects and fixes a case main body 2 described later to the support 9.

The case main body 2 is formed in a long and narrow rectangular box shape having an appropriate size (total length: 1000 mm, width: 300 mm, depth: 160 mm). It is configured so that it can be freely connected.

That is, as shown in FIGS. 1 to 3, the case body 2 has a rectangular upper base 18 having a bearing mounting hole 18a formed in the center, and faces the upper base 18.
A rectangular lower base 19 having a bearing mounting hole 19a facing the bearing mounting hole 18a, four side plates 20 mounted between the bases 18, 19, and a lower end fixed to the outer surface of the lower end of the side plate 20, 1 support 9
A mounting bracket 21 detachably connected to and fixed to the
The connecting mechanism 22 is provided on the lower base 19 and is capable of detachably connecting the rod 5 and supports a screw shaft 48 of the hammer lifting mechanism 4 described later.
Further, the case body 2 has one side plate 20 attached to the other side plate 20 by a hinge 23 so as to be openable and closable, so that the inside of the case body 2 can be easily inspected.
Further, the case body 2 has a plurality of handles 24 on its side plate 20.
Are attached, so that the case body 2 can be carried and lifted smoothly and easily.

As shown in FIGS. 3 and 5, the connecting mechanism 22 is rotatably supported in a bearing mounting hole 19a of the lower base 19 via a radial bearing 25, a thrust bearing 26 and a nut 27 so as not to move in the axial direction. A knocking block 28 made of a steel material having a flange 28a at a lower end portion and having an insertion hole 28b into which a screw shaft 48 is inserted at a shaft center position, and being connected and fixed to a lower end surface of the knocking block 28 by a bolt 29; The rod 5 located on the axis of the knocking block 28
The male screw 5a of the rod 5 is connected to the female screw 30a of the rod 5 by screwing the male screw 5a of the rod 5 to the female screw 30a of the connecting block 30. And the rod 5 can be connected to the lower end of the case body 2 in a vertical orientation.

As shown in FIG. 3, the hammer 3 is formed in a substantially cylindrical shape with a steel material having a weight of 20 kg, and is slightly larger than the screw shaft 48 inserted into the screw shaft 48 at the axial center position. A shaft insertion hole 3a having a diameter is formed. The outer peripheral surfaces of both ends of the hammer 3 are formed in a tapered shape, and an annular locking groove 3b is formed in the outer peripheral surface on the upper end side.
A part of the inner surface on the upper side of the locking groove 3b has a tapered surface 3c.
Is formed. Further, a plurality of bushes 31 are fitted to both ends of the inner peripheral surface of the shaft insertion hole 3a of the hammer 3 so that the hammer 3 can smoothly slide on the outer peripheral surface of the screw shaft 48.

The hammer 3 is externally fitted on the screw shaft 48 so as to be movable in the axial direction.
A hitting position for indirectly hitting the vertically oriented rod 5 connected to the connecting block 30 by contacting the upper end surface of the rod 5 (FIG. 1)
) And a certain distance upward from this position (50c
m) and a drop start position (position shown in FIG. 7) separated by m).

As shown in FIG. 3, the hammer lifting mechanism 4 is provided in the case body 2, lifts the hammer 3 at the striking position to a drop start position, and allows the hammer 3 to freely fall at this position. A finger mechanism 32 for gripping the hammer 3, a cam mechanism 33 for opening the finger mechanism 32, and a drive mechanism 34 for moving the finger mechanism 32 up and down along the rod 5.

Specifically, the finger mechanism 32
As shown in FIGS. 2 to 4, an aluminum alloy block-shaped finger base 35 is externally movably fitted to the screw shaft 48 in the axial direction, and a support pin 36 is attached to the finger base 35.
And a pair of fingers 3 made of steel material, which are swingably supported by each other, and which are disposed to face each other in a vertical position with the screw shaft 48 interposed therebetween.
7 and a coil spring 38 interposed between the fingers 37 and biasing the fingers 37 in the closing direction. Further, the pair of fingers 37 includes a locking claw 37a at the tip end (lower end) which is removably locked to the inner surface 3c of the locking groove 3b of the hammer 3, and the interval between the locking claws 37a is related. Closed position (the position shown by the solid line in FIG. 3 and the position shown in FIG. 5) in which the outer diameter of the inner surface 3c of the stop groove 3b becomes narrower.
And an open position (a position shown by a dashed line in FIG. 3 and a position shown in FIG. 7) in which the interval between the locking claws 37a is wider than the outer diameter of the inner surface 3c. The urging force of the spring 38 and the stopper pin 39 fixed to the finger base 35 are urged and held at the closed position. Further, a synthetic resin block-shaped sliding member 40 that slides on the inner surface of the side plate 20 of the case body 2 is attached to the finger base 35, and the screw shaft 48 is held in a state where the finger base 35 is prevented from rotating.
It moves up and down along.

As shown in FIG. 3, the cam mechanism 33 is fixed to the lower surface of the upper base 18 of the case main body 2 so as to be opposed to each other with a screw shaft 48 interposed therebetween, and has a cam surface 41a inclined in a C-shape. The finger base 35 includes a pair of alloy cam plates 41 and a cam roller 43 rotatably supported on the upper end of the finger 37 via a support shaft 42 and capable of rolling on the cam surface 41 a of the cam plate 41. When the cam roller 43 moves upward and rolls on the cam surface 41a of the cam plate 41 upward, the finger 37 is swung from the closed position to the open position against the urging force of the coil spring 38.

As shown in FIG. 3, the drive mechanism 34 has a bearing at the upper end thereof through a bearing 44 and a nut 45 in a bearing mounting hole 18a of the upper base 18, and a lower end thereof in an insertion hole 28b of the knocking block 28. 46
A screw shaft 48 which is rotatably supported via a retaining plate 47 and the like so as not to move in the axial direction, and has a spiral groove on the outer peripheral surface on which a steel ball rolls, and is fitted to the center position of the finger base 35. A nut 49 that accommodates a steel ball that is fitted and fitted on the screw shaft 48 and rolls in the groove of the screw shaft 48;
A servomotor 52 fixed to the upper surface of the upper base 18 through a mounting base 50 made of synthetic resin and bolts 51 for rotating the screw shaft 48 forward and reverse;
When the screw shaft 48 is rotated forward and reverse by the servo motor 52, the finger mechanism 32 moves up and down in a state where it is prevented from rotating.

The drive mechanism 34 includes a power switch, a start switch, a stop switch, a display unit for counting and displaying the number of hits by the hammer 3, and a displacement amount of the support 9 based on a detection signal from the rotary encoder 15. Is driven and controlled by a control panel (not shown) provided with a printer or the like that prints out each screw.
To the position shown in FIG. 5 (the position where the locking claw 37a of the finger 37 is locked in the locking groove 3b of the hammer 3) and the position shown in FIG. 7 (the position where the finger 37 is opened by the cam mechanism 33). It reciprocates over it.

The position of the cam plate 41, the inclination angle of the cam surface 41a, the positional relationship between the cam plate 41 and the cam roller 43, the length of the finger 37, the position of the swinging fulcrum of the finger 37, etc. The cam mechanism 33 selects the finger 37 of the finger mechanism 32 to be in the open position when the 3 is lifted from the upper end surface of the knocking block 28 to a height of 50 cm. As a result, the hammer 3 falls freely from a height of 50 cm (fall start position). Although not shown, a safety sensor (for example, a magnetic sensor, a limit switch, or the like) for stopping the drive mechanism 34 when the finger mechanism 32 moves up or down more than necessary is arranged in the case main body 2. ing.

In the hammer lifting mechanism 4, before the operation, the finger mechanism 32 is at the lower position (the position indicated by the solid line in FIG. 3) and the locking claw 37a of the finger 37 is moved to the upper end side of the hammer 3. Is in contact with the tapered surface. In this state, the drive mechanism 34 is operated by a control panel (not shown).
Is operated, the screw shaft 48 is rotated by the servo motor 52 in a direction to raise the finger mechanism 32. Thereby, the finger mechanism 32 moves up along the screw shaft 48.

The finger mechanism 32 rises and the hammer 3
Approaching the falling start position, the finger 37 swings from the closed position to the open position by the cam mechanism 33. That is, the cam roller 43 comes into contact with the cam surface 41a of the cam plate 41, and rolls upward on the cam surface 41a in this state. Along with this, the finger 37 swings from the closed position to the open position with the support pin 36 as a fulcrum (see the dashed line in FIG. 3).

When the finger 37 is swung to the open position by the cam mechanism 33, the screw shaft 48 is driven by the servo motor 52.
Rotates in a direction to lower the finger mechanism 32. As a result, the finger mechanism 32 moves down along the screw shaft 48, the contact between the cam roller 43 and the cam plate 41 is released, and the finger 37 swings from the open position to the closed position, and is in the hitting position in this state. It descends to the position of the hammer 3.

When the finger mechanism 32 is lowered to the position of the hammer 3, the finger 37 in the closed position has its locking claw 37a abutting against the tapered surface on the outer peripheral surface at the upper end of the hammer 3, and the coil spring 38 is formed by the tapered surface. Descends while swinging from the closed position to the open position against the urging force of
When the locking claw 37a faces the locking groove 3b of the hammer 3, the locking claw 37a swings from the open position to the closed position by the urging force of the coil spring 38. As a result, the locking claw 37a of the finger 37 enters the locking groove 3b of the hammer 3, and the hammer 3
Is in a state of being gripped by the finger 37 as shown in FIG.

When the locking claw 37a of the finger 37 enters the locking groove 3b of the hammer 3, the screw shaft 48 is rotated by the servo motor 52 in a direction to raise the finger mechanism 32. Thus, the finger mechanism 32 moves up along the screw shaft 48, and lifts the hammer 3 to the drop start position.

When the hammer 3 approaches the drop start position as shown in FIGS. 6 and 7 due to the rise of the finger mechanism 32, the finger 37 of the finger mechanism 32 swings from the closed position to the open position by the cam mechanism 33. The locking claw 37a of the finger 37 comes off the locking groove 3b of the hammer 3. As a result, the hammer 3 freely falls along the screw shaft 48 from the drop start position, and the knocking block 2
8 will collide with the upper end face. At this time, when the rod 5 is connected to the connection block 30, the rod 5 is driven into the underground A by an impact due to the collision between the hammer 3 and the knocking block 28.

Thereafter, the finger mechanism 32 is lowered again by the drive mechanism 34, and the above-described operation is repeated. As a result, the hammer 3 repeatedly rises and falls,
The knocking block 28 is repeatedly hit.

In the penetrating tester, the upper base 18, the lower base 19 and the side plate 20 of the case main body 2, the base 7 and the columns 8 of the stand 1 are used to reduce the weight of the penetrating tester itself. It is formed of an aluminum alloy material.

Next, in order to investigate the depth of the base A '(a hard layer such as a bedrock or a gravel layer) using the penetration tester of the present invention, first, the stand 1 is fixed to the ground at the investigation point by the anchor 16.
And the case body 2 is connected and fixed to the support 9 of the stand 1 via the lock pin 17 (see FIG. 8). At this time, the support 9 is located on the lower end side of the column 8.

After the case main body 2 is connected and fixed to the support 9, the handle 13 of the raising operation mechanism 10 is turned in a predetermined direction (counterclockwise direction in FIG. 8), and the support 9 and the case main body 2 are moved along the column 8. The support member 9 is lifted to a predetermined height position (a position where the stopper 9 can prevent the support 9 from dropping), and the stopper 8 is
Further, free fall of the case body 2 is prevented (see FIG. 1).
In addition, since the case body 2 is lifted via the lifting operation mechanism 10 including the rack 8a, the gear 12, and the handle 13, even the case body 2 containing the heavy hammer 3 and the like inside. It can be easily and easily lifted to a predetermined height position.

When the case body 2 is held at a predetermined height position by the stopper pin 14, the rod 5 with the drill 6 connected to the connecting block 30 of the connecting mechanism 22 is connected and fixed, and the stopper pin 14 is pulled out. Then,
The support 9 and the case main body 2 are lowered by a small amount along the column 8, and the tip of the drill 6 is pushed up to the ground.
(See Fig. 9)

Thereafter, the control panel (not shown) is kept in the above state.
To operate the hammer lifting mechanism 4. Then, the hammer 3 is lifted from the hitting position to the drop starting position by the hammer lifting mechanism 4, falls freely from this position, and collides with the knocking block 28 of the connecting mechanism 22. By the impact at this time, the rod 5 connected to the connecting block 30 in the upright posture is driven into the underground A,
The case body 2 and the support 9 descend along the support 8 by the amount of penetration of the rod 5.

Similarly, the hammer lifting mechanism 4 causes the hammer 3 to freely fall from the drop start position to the hitting position many times, and hits the knocking block 28. Thus, the rods 5 are sequentially driven into the underground A (see FIG. 10). At this time, the rod 5, the connecting block 30 and the knocking block 28 are driven into the underground A while rotating by the drill 6 connected to the tip of the rod 5, but the lower base 19 and the support block 2
Since the bearings 25 and 26 are provided between the case body 2 and the case 8, the case body 2 descends without rotating. Also, the rotary encoder 15 provided on the support 9
Is detected one by one, and based on this detection signal, a printer provided on the control panel prints out the descending amount of the support 9 one by one. As a result, the amount of penetration of the rod 5 at each time can be automatically measured and recorded.

When the first rod 5 to which the drill 6 is connected is substantially driven into the underground A as shown in FIG. 10, the new rod 5 is substantially driven into the ground, and the connecting block 30 and the rod 5 are driven. And each rod 5 is continuously driven into the underground A (see FIG. 11). That is, the hammer lifting mechanism 4 is stopped by the control panel, the connection between the connecting block 30 and the rod 5 is released, and the lifting operation mechanism 10 is operated to move the support 9 and the case body 2 to the support 8.
Up to a predetermined height position, and then connect the upper end of the new rod 5 to the connection block 30 and the lower end of the new rod 5 to the upper end of the rod 5 which is substantially driven into the ground A. Then, the hammer lifting mechanism 4 is operated by the control panel. Then, the hammer 3 is freely dropped many times by the hammer lifting mechanism 4 and hits the knocking block 28. Thus, the newly connected rods 5 are also sequentially driven into the underground A.

In this way, the rods 5 are sequentially driven into the underground A while being connected, and when the rods 5 do not enter the underground A, the drill 6 at the tip of the rod 5 is connected to the base A 'such as a bedrock. (See FIG. 12).
At this time, the depth of the base A 'can be known by reading the number of rods 5 driven into the ground A and the scale of the rods 5 projecting from the ground to the ground. Further, since the amount of penetration of the rod 5 driven by one impact is measured and recorded one by one, the properties of the ground can be roughly determined. Furthermore, if the number of hits required to drive the rod 5 into the underground A by a certain length (for example, 30 cm) is measured, the properties of the ground into which the rod 5 has been driven can be determined more accurately. .

In the above example, the case body 2 containing the hammer 3 and the hammer lifting mechanism 4 is supported on the stand 1 so as to be able to move up and down, and the rod 5 is driven into the ground in this state. In another example, the stand 1
Is omitted, and the case body 2 in which the rod 5 is connected to the lower end side
May be held in a standing position by hand so that the drill 6 pierces the ground, and in this state, the hammer lifting mechanism 4 is operated by the control panel to drive the rod 5 into the ground. In this case, when connecting a new rod 5, it is necessary to lift the case body 2 by hand.

In the above example, the rod 5 is formed of a solid rod, but in another example, the rod 5 is formed of a pipe, and the pipe-shaped rod 5 is driven into the underground A. You may do it. In this case, the geological material enters the inside of the rod 5, and the change of the stratum, the structure, and the like can be accurately known by pulling out the rod 5 later.

In the above example, the case main body 2 is supported on the column 8 of the stand 1 in a cantilever manner so as to be able to move up and down. In other examples, the column 8 of the stand 1 is formed as a gate. And the case main body 2 may be arranged between the columns 8 so as to be supported on the columns 8 in a vertically movable manner.

In the above example, the support 9 and the case body 2 can be detachably connected by the lock pin 17, but in other examples, the support 9 and the case body 2 can be connected.
May be detachably connected by a hook structure.

In the above example, the support 9 and the case body 2 can be detachably connected by the lock pin 17, but in other examples, the support 9 and the case body 2 can be connected.
May be fixed inseparably.

In the above example, the support 9 is moved up and down along the column 8 by the raising operation mechanism 10 composed of a rack mechanism. In other examples, the lifting operation mechanism 10 is screwed. You may make it comprise by a jack mechanism.

[0053]

[0054]

In the above example, the connecting mechanism 22 is provided on the lower base 19 of the case body 2 and the rod 5 is removably connected to the connecting block 30 of the connecting mechanism 22. In this case, the connecting mechanism 22 may be omitted, and the rod 5 may be directly and detachably connected to the lower base 19 of the case body 2. In this case, it is necessary to rotatably support the lower end of the screw shaft 48 by another means.

In each of the above examples, the penetration tester
g is used, but the weight of the hammer 3 is not limited to the above example.
As long as it can be driven into the ground. For example, a 10 kg hammer 3 may be used.

[0057]

[0058]

As described above, in the penetration tester according to the first aspect of the present invention, the rod is connected to the lower end of the case body in a vertical position, and the hammer provided in the case body so as to be able to move up and down is also used in the case. A hammer lifting mechanism provided on the main body lifts the hammer to a certain height position, at which point the hammer falls freely, and the rod is indirectly hit and driven into the ground. As a result, if the penetration tester of the present invention is used,
Investigation of the ground can be performed simply and easily without the need to manually lift a heavy monken tens or hundreds of times as in a conventional penetration tester. In addition, since the penetration tester has a relatively simple structure and is configured to be of a size that can be carried around, the cost of equipment and investigation for exploring the ground does not increase significantly, and economic efficiency is not increased. It is also excellent in handling and handling.

The penetrating tester according to the second aspect of the present invention has the following effects in addition to the above effects.
That is, since the case main body is supported on the column installed on the ground so as to be able to move up and down, it is not necessary to hold the case main body manually even when the rod is driven into the ground. Further, even a case body containing a heavy hammer or the like inside can be easily and easily lifted to a predetermined height position. As a result, the survey of the ground can be performed more easily and easily.

[Brief description of the drawings]

FIG. 1 is an overall side view showing an example of a penetration tester of the present invention.

FIG. 2 is an enlarged cross-sectional view taken along line II of FIG.

FIG. 3 is a longitudinal sectional view of a main part of the penetration testing machine.

FIG. 4 is an enlarged sectional view taken along line II-II of FIG. 3;

FIG. 5 is a partially cutaway front view showing a part of the penetration tester, with a finger mechanism gripping a hammer.

FIG. 6 is a cross-sectional view showing a part of the penetrating tester in a state where a finger mechanism lifts a hammer.

FIG. 7 is a cross-sectional view showing a part of the penetrating tester in a state in which the finger mechanism has separated the hammer.

FIG. 8 is a schematic side view of a penetration tester in a state where a stand is installed and fixed on the ground and a case body is connected and fixed to a support.

FIG. 9 is a schematic side view of a penetration tester in a state where a rod is connected and fixed to a case body and the rod is protruded from the ground.

FIG. 10 is a schematic side view of a penetration tester in a state where a rod is driven into the ground.

FIG. 11 is a schematic side view of a penetration tester with a rod added.

FIG. 12 is a schematic side view of the penetration tester in a state where the rod has reached the base.

FIG. 13 is a partially cutaway front view of a conventional penetration tester.

FIG. 14 is a schematic front view of a conventional penetration tester and a rod standing on the ground.

FIG. 15 is a schematic front view of a state where a rod is driven into the ground.

FIG. 16 is a schematic front view showing a state where a rod is added.

[Explanation of symbols]

1 is a stand, 2 is a case body, 3 is a hammer, 4 is a hammer lifting mechanism, 5 is a rod, 8 is a support, and A is underground.

Claims (2)

(57) [Claims] With 1. A possible and removably connected in portrait orientation ground (A) is freely connected the end portions, which are discharged vertically to rod (5) in the lower portion takes the handle (24)
A box-shaped case body (2) attached thereto and a rod (5) in a vertical position, which is provided to be vertically movable within the case body (2) and connected to a lower end of the case body (2), are indirectly hit. Hammer (3), which can take a hitting position at which it strikes and a drop starting position separated by a certain distance upward from this position, and a hammer (3) provided on the case body (2) and lifts the hammer (3) at the hitting position to the drop starting position. A hammer lifting mechanism (4) for freely dropping the hammer (3) at the lever position;
A penetration test machine, wherein the hammer lifting mechanism (4)
Is provided in the case body (2) and has a hammer (3).
Finger with openable fingers (37) for gripping
A mechanism (32) and a filter provided in the case body (2).
Release the finger (37) of the finger mechanism (32).
Cam mechanism (33) and screws provided on the case body (2)
The shaft (48) is rotated forward and backward by the servo motor (52).
By doing so, the finger mechanism (32) is connected to the screw shaft (4).
8) a drive mechanism (34) that moves up and down along
The finger mechanism (32) is driven by the drive mechanism (34).
Raise and lower the hammer (3) at the impact position with the finger.
-Grab with the finger (37) of the mechanism (32) and start dropping
To the position, and in this position the finger mechanism (32)
Operation of the finger (37) by the cam mechanism (33).
To make the hammer (3) fall freely
Penetration tester, characterized by that. 2. A stand (1) provided on the ground and having a column (8) in a vertical position, supported by a column (8) of the stand (1) so as to be able to move up and down, and vertically into the ground (A). together and can be detachably connected by vertical orientation to the lower end of the ends is connected freely rod (5), which are discharged in the direction, bunch
A box-shaped case body (2) to which a hand (24) is attached; and a vertically oriented rod (5) provided in the case body (2) so as to be vertically movable and connected to a lower end portion of the case body (2).
Hammer (3), which can take a striking position for indirectly striking and a drop start position spaced upward from this position by a certain distance, and a hammer (3) provided in the case body (2) and located at the striking position. a hammer in this position by lifting up the drop starting position (3) a free-fall is to hammer lifting mechanism (4) and penetration tester provided with the said Stan
Do (1) supports the case body (2) by manual operation
A lifting operation mechanism (10) for lifting along (8) is provided.
Further, the hammer lifting mechanism (4) includes a case body.
(2) Provided inside and can be opened and closed to grasp the hammer (3)
Finger mechanism (32) with finger (37)
And a finger mechanism provided in the case body (2).
A cam mechanism for opening the finger (37) of (32)
(33) and a screw shaft (48) provided on the case body (2).
Is rotated forward and reverse by a servo motor (52).
The finger mechanism (32) along the screw axis (48)
A driving mechanism (34) for raising and lowering the finger;
The mechanism (32) is moved up and down by the drive mechanism (34),
The hammer (3) in the firing position is moved to the finger mechanism (32).
Grab with the finger (37) and lift to the drop start position
At this position, the finger of the finger mechanism (32)
(37) is opened by the cam mechanism (33) to operate the hammer.
-A penetration tester characterized by being configured to drop (3) freely .