JPH0629209Y2 - Automatic penetration tester - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an automatic penetration tester, and more particularly, to an automatic penetration tester for easily investigating the ground bearing capacity of the foundation ground during construction of a house or the like. .

[Prior art]

An example of this type of penetration tester is disclosed in Japanese Patent Laid-Open No. 59-9.
There is one described in Japanese Patent No. 8920. That is, this is as shown in FIGS. 10 and 11. The hammer 42 is designed to fall freely by being guided by the guide rod 41 which is erected in the up and down direction, and is hit by the hammer 42 to penetrate the penetration rod 43 and the cone 4.
4 penetrates into the ground. The penetration degree of the penetration rod 43 is recorded by the recording device 46 housed in the case 45. The hammer 42 that has fallen freely and hit the penetrating rod 43 is connected to the wire 47, and the wire 47 is lifted to move up. The wire 47 is driven by being interlocked with a drive motor 48, and is unwound at regular intervals by a unwinding mechanism 49 housed in the case 45, allowing the hammer 42 to fall freely. It is designed to let you. The winding release mechanism 49 includes a cam 50 driven by the drive motor 48 and a cam 5 formed on the winding shaft 51 of the wire 47.
2 are engaged and disengaged at regular intervals.

[Problems to be solved by the invention]

As described above, conventionally, the wire 47 has the hammer 42 at regular intervals.
And a free-fall mechanism by which the drive motor 48 is required to wind the wire 47 and a rewind mechanism 49 is required to rewind the wire 47. . For this reason, there is a problem that not only the mechanism becomes complicated, but also a failure is likely to occur, and in addition, maintenance costs for consumable parts are required.

The present invention has been made in view of the above circumstances and was devised in order to eliminate the problem, and it is possible to simplify the mechanism, reduce breakdowns, and reduce maintenance costs by eliminating the need for a winding releasing mechanism. It is intended to provide an automatic penetration tester.

[Means for solving problems]

In order to achieve the above object, the present invention provides a penetrating portion that penetrates into the ground, a driving device that freely falls to strike the penetrating portion, an engaging portion that is provided on the driving device, and that is detachable. A recording device for recording the degree of penetration of a part, an endless belt suspended in a vertically rotatable manner, a drive device for driving the endless belt, and the driving device provided at the endless belt with an appropriate interval. The lifting device includes a lifting device that locks to the provided engaging part to lift the driving device, and a releasing device that releases the locking of the engaging part to the lifting device at the lifting position.

[Action]

According to the structure of the present invention, the penetration portion is hit by the free fall of the driving device and driven into the ground, and the penetration degree is recorded by the recording device, but when the driving is finished, the driving device is driven by the driving device. The lifting device provided on the endless belt that is driven and rotated by means of the locking device lifts the lifting device by locking it at an appropriate interval, and when it lifts to the appropriate position, the lifting device releases the locking of the driving device to the driving device. Then, the driving device is allowed to fall again, and thereafter the hammer is repeatedly moved up and down to measure the ground bearing capacity of the ground.

〔Example〕

The configuration of the present invention will be described based on an embodiment shown in the drawings.

FIG. 1 is an overall front view, FIG. 2 is an overall plan view, FIG. 3 is a plan view of essential parts, FIG. 4 is a sectional view taken along line IV-IV of FIG. 1, and FIG. 5 is a perspective view of essential parts. FIG. 6 is a perspective view of the connector with the knocking head attached, and FIG. 7 is a side view of the state where the lifting tool engages with the engaging portion.

The penetrating rod 1 penetrating into the ground is erected vertically,
It can be added to an appropriate length by screwing at both end positions, and can be added sequentially depending on the degree of penetration. The tip of the penetrating rod 1 is screwed into the penetrating cone 2
Is attached, and the penetrating cone 2 penetrates into the ground. On the other hand, at the base end portion of the penetrating rod 1, as shown in FIGS. 5 and 6, a knocking head 3 that is hit by a hammer 6 described later is inserted through a connector 1a screwed to the base end portion. It is provided. The side portion of the knocking head 3 protruding laterally is inserted into a guide pole 4 facing the penetrating rod 1 so that the knocking head 3 can move up and down freely, and is prevented from swinging. 3a is a knocking head 3
It is a safety rubber attached to the top of the.

The penetrating rod 1 is struck from above by a driving device 5 and penetrates into the ground. The driving device 5 includes a hammer 6, a guide rod 7 for vertically inserting the hammer 6 and a lifting tool 24 described later. It is composed of an engaging portion 8 which is engaged and raised. As shown in FIGS. 3 and 5, the engaging portion 8 has a pair of arm portions 8a and 8b whose base ends are pivotally supported by the hammer 6 with the guide rod 7 interposed therebetween, and protrusions of the arm portions 8a and 8b. It is composed of a spring 8c that urges the ends of the arms 8a and 8b toward the inside. The arms 8a and 8b are engaged with a later-described lifting tool 24 at the positions of the projecting ends of the arms 8a and 8b and lifted together with the hammer 6. Further, on the projecting end sides of the arms 8a and 8b, a taper portion 9 that spreads downward is formed, and the engagement portion 8 engages with the taper portion 9. When the engaging portion 8 rises, it comes into contact with the engaging release portion 10 attached to the upper portion of the guide rod 7. The lower surface side of the disengagement portion 10 is formed in a downwardly tapered taper portion 11, and the taper portion 11 bites between both arms 8a and 8b of the engagement portion 8 and the spring 8c. The arms 8a and 8b are opened outward against the urging force of the arm. Further, a support rod 12 is screwed onto the upper portion of the guide rod 7 to join it.

Further, a wheel 13 is in contact with the tip end side of the penetrating rod 1, the wheel 13 rotates as the penetrating rod 1 penetrates, and the penetration degree of the penetrating rod 1 via the universal joint 14 connected to the foil 13 is increased. Are recorded by the automatic recording device 15.

On the other hand, an endless chain 16 is vertically rotatably suspended facing the penetrating rod 1 and the guide rod 7. That is, a column 18 is erected on the base 17 so as to face the penetrating rod 1 and the guide rod 7, and the upper portion of the column 18 is supported by the support rod 12.
The chain 16 is suspended between the sprockets 19 and 20 rotatably provided at the upper and lower ends of the column 18. The chain 16 is driven by a drive motor 21 connected to a rotating shaft of a sprocket 20 on the lower end side. The drive motor 21 is started and stopped by an appropriate means such as a remote device (not shown). The column 18 is formed so as to be capable of being center-folded via a hinge 22, and is easily bent by being bent for transportation.
Reference numeral 23 is a guide pole for a limit switch which is linked with the automatic recording device.

The chain 16 includes three lifting tools 24 at equal intervals.
Are provided so as to project to both sides. As shown in FIGS. 3 and 7, the lifting tool 24 engages with the engaging portion 8 of the hammer 6 to lift the hammer 6.
When the hammer 6 is raised to the disengagement portion 10, the arm portion 8
The taper portion 9 of a and 8b is the taper portion 11 of the disengagement portion 10.
When the arm portions 8a and 8b are opened against the biasing force of the spring 8c by abutting against, the engagement is released.

The weight of the hammer 6 is about 6 kg, and the distance between the knocking head 3 and the engagement releasing portion 10, that is, the hammer 6
Drop height is about 50 cm, hammer 6 hits 30 times /
Each minute is set.

Next, the operation of the present invention having the above configuration will be described.

Now, when building a building, the penetration of the penetration rod 1 is measured in order to investigate the ground bearing capacity of the foundation ground.
It is assumed that hammering is started from the state where the hammer 6 is in contact with the knocking head 3. First, when the drive motor 21 is driven by a remote device or the like, the chain 16 is rotated in the vertical direction, and the lifting tool 24 is also rotated integrally with the rotation of the chain 16. Then, when the lifting tool 24 reaches the position of the hammer 6, it engages with the taper portion 9 of the engaging portion 8 and moves the hammer 6 along the guide rod 7 to the position of the disengagement portion 10 50 cm above the knocking head 3. Up to
At the position of this disengagement portion 10, the taper portion 11 of the disengagement portion 10 bites between the arms 8a and 8b. By this biting, the projecting ends of the arms 8a and 8b spread horizontally in opposition to the biasing force of the spring 8c, and are guided by the taper portion 9 to raise the lifting tool 24.
Is disengaged, the hammer 6 falls freely along the guide rod 7, hits the knocking head 3, and causes the penetrating rod 1 to penetrate into the ground together with the penetrating cone 2. Then, the penetration of the penetration rod 1 causes the wheel 13 to rotate, and the penetration degree is transmitted to the automatic recording device 15 via the universal joint 14 attached to the wheel 13 for recording. On the other hand, the lifting tool 24 with the engaging portion 8 disengaged rotates as it is with the rotation of the chain 16, and the next lifting tool 24 drops and reaches the position of the hammer 6 in contact with the knocking head 3. Then, it engages with the engaging portion 8 again to raise the hammer 6, and this is repeated, and the bearing capacity of the foundation ground is measured. In addition, since the ground surface height of the penetrating rod 1 becomes shorter as it penetrates, the penetrating rod 1 penetrates at a constant height above the ground surface.

In this way, by rotating the chain 16 in only one direction, the lifting tool 24 provided on the chain 16 can lift the hammer 6 at a constant interval and stop the lifting to free fall. There is no need to wind or rewind the. Therefore, it is not necessary to provide a winding release mechanism as in the conventional case, which simplifies the device and reduces failures.
In addition, maintenance costs for consumable parts and the like can be reduced.

Further, the hammer 6 is provided with the engaging portion 8 while the chain 16 is provided with only the lifting tool 24, and the hammer 6 becomes heavy and the impact force on the penetrating rod 1 is strengthened, so that a smooth penetration test can be performed. Can be done with chain 1
6, the load on the drive motor 21 and the like is reduced, and the chain 16
It is possible to prevent accidents such as disconnection of the disk and seizure of the drive motor 21.

Further, the disengagement of the engaging portion 8 with respect to the lifting tool 24 is performed by the arms 8a and 8b expanding in the horizontal direction at the position of the disengaging portion 10, and the load on the chain 16, the drive motor 21, etc. Is reduced and the chain 16 is cut and the drive motor 2
It is possible to prevent accidents such as seizure of 1.

8 and 9 show another embodiment of the penetrating cone applicable to the present invention. This is the outer cylinder 31
The inner cylinder 32 is provided in the hollow part 31a of the above so as to be relatively rotatable. Then, the outer tubular body 31 and the inner tubular body 32
Openings 33 and 34 are formed on the peripheral surfaces of the outer cylindrical body 31 and guide protrusions 35 are formed on one side in the vertical direction of the edge of the opening 33 of the outer cylindrical body 31. Then, after the cone is penetrated to an appropriate position in the ground by the automatic penetration tester of the present invention, the outer cylindrical body 31 is rotated in the direction of the arrow in the figure, so that the guide projection 34 scrapes the soil to form the opening. 33, 3
Since the openings 33 and 34 are introduced by being introduced into the inner cylindrical body 32 from 4, the underground soil at a desired position can be collected. The rotation of the outer cylindrical body 31 is performed by appropriately attaching to the peripheral surface a rotating tool that transmits the turning force only in one direction and idles in the other direction and does not transmit the turning force.

Although the chain 16 is shown as the endless belt in the above embodiment, the present invention is not limited to this, and a rope, wire, belt or the like may be used.

[Effect of device]

As is clear from the above description, according to the present invention, it is possible to realize an automatic penetration testing machine with simplified equipment and less maintenance of malfunctions and consumable parts. It can be performed. At the same time, only the lifting device is provided in the endless belt where the engaging device is provided in the endless belt, and since the driving device becomes heavy, the impact force on the penetration part is strengthened and a smooth penetration test is performed. Although it can be performed, the load on the endless belt and the drive unit is reduced, so accidents such as cutting the endless band and seizure of the drive unit can be prevented.

[Brief description of drawings]

The drawings show an embodiment of an automatic penetration tester according to the present invention. Fig. 1 is an overall front view, Fig. 2 is an overall plan view, Fig. 3 is a plan view of essential parts, and Fig. 4 is Fig. 1 IV. -IV line sectional view, fifth
FIG. 6 is a perspective view of a main part, FIG. 6 is a perspective view with a connector for assembling a knocking head, FIG. 7 is a side view of a state where a lifting tool engages with an engaging portion, and FIG. 8 is applied to the present invention. FIG. 9 is a front view of another embodiment of the penetrating cone shown in FIG.
Line sectional views, FIG. 10 and FIG. 11 show a conventional example.
FIG. 0 is an overall perspective view, and FIG. 11 is a perspective view of essential parts. (Explanation of reference numerals in drawings showing main parts) 1 ... Rod, 2 ... Penetration cone 3 ... Knocking head 5 ... Driving device, 6 ... Hammer 8 ... Engaging portion, 10 ... Disengagement Part 15: Automatic recording device, 16: Chain 24: Lifting device

Claims (1)

[Scope of utility model registration request] 1. A penetration part that penetrates into the ground, a driving device that strikes the penetration part by free fall, an engagement part that is provided on the driving device and is detachable, and a penetration degree of the penetration part is recorded. Recording device,
An endless belt that is rotatably suspended in the vertical direction, a drive device that drives the endless belt, and an engaging portion that is provided at an appropriate interval on the endless belt and that is engaged with an engaging portion provided on the driving device. An automatic penetration tester comprising: a lifting device for lifting a driving device; and a release device for releasing a lock of an engaging portion with respect to the lifting device at a lifted position.