JP2525370Y2 - Automatic penetration tester for ground strength investigation - 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 examining the hardness of a ground such as a residential land, that is, a ground bearing strength.

[0002]

2. Description of the Related Art A conventional automatic penetration tester for investigating the earth bearing strength has the following construction.

[0003] That is, an elevating slider is provided on a vertically elongated frame, which is vertically moved up and down by means of up and down elevating means. A rotating motor is provided, and a rotating chain is used as the up / down moving means.

[0004] The rotating chain is bridged between sprockets provided at the upper end and the lower end of the frame.
This rotating chain is rotated by a handle provided on the front side of the frame (the side facing the operator).

[0005]

However, as described above, if the means for rotating the rotating chain is a handle provided on the front side of the frame (the side facing the operator), during the operation, When the handle is inadvertently counter-rotated by the recoil of the penetrating rod, the handle may hit an operator's arm or the like, causing the operator to be injured or fractured, resulting in a problem in safety.

In addition, since the handle protrudes outside the frame, there is a problem that work is difficult.

An object of the present invention is to solve the above-mentioned conventional problems. In other words, it is an object of the present invention to provide an automatic penetration tester for earth proof test capable of performing a safe penetration test operation without danger and easily performing the operation.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a penetration rod loaded with a predetermined load is driven to rotate, and at this time, the penetration size of the penetration rod into the ground, the number of rotations, and the like are determined. In the automatic penetration tester for earth strength survey, which measures the soil strength of this ground, this automatic penetration tester is attached vertically erected on the ground and vertically movable on this frame. A lifting shaft having a rotating shaft to which the upper end of the penetrating rod is connected, a motor for rotating the rotating shaft, and a loading portion on which a weight can be placed; and a lifting slider connected to the lifting slider with a wire. The lifting slider is lifted up by a winch via a wire, and when the winch becomes free, it descends only by its own weight,
It is characterized in that the penetration rod penetrates into the ground.

[0009]

[Function] Since the lifting slider attached to the frame so as to be vertically movable is lifted using the winch, the wire wound by the winch is not loosened and no load is applied during the test in which the lifting slider is lowered by its own weight. Therefore, even if the penetrating rod attempts to rotate counterclockwise, there is no fear that the winch counterrotates. Therefore, the worker is not exposed to danger and the work can be performed safely.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of an automatic penetration tester according to the present invention.

FIG. 1 is a side view showing an embodiment of an automatic penetration tester for investigating a soil bearing strength according to the present invention, and FIG. 2 is a front view of FIG.

In the automatic penetration tester S for earth strength inspection according to the present invention, an elevating slider 3 is movably mounted on a vertically elongated frame 1 vertically suspended on the ground, and a weight 4 is attached to the elevating slider 3. , A rotary shaft 7 connected to the upper end of the penetrating rod 6, and a motor 8 for driving the rotary shaft 7 to rotate. A winch 2 is provided on one side of the frame 1 to lift the lifting slider 3.

The winch 2 may be a manual winch or an electric winch.
Is mounted at a substantially central position in the height direction on the front side (the side facing the operator).

A pulley 9 is provided at the upper end of the frame 1, a wire 10 is hung from the winch 2 to the pulley 9, and an end of the wire 10 is connected to the lifting slider 3.
It is connected to.

By driving the winch 2, the wire 10 is taken up and the lifting slider 3 connected to the wire 10 is pulled up.

In the figure, reference numeral 11 denotes a numerical counter,
The number counter 11 counts the number of rotations of the rotating shaft 11 by an arm plate 12 provided on the rotating shaft 7.

In the automatic penetration tester S for earth strength investigation of the present invention, with the penetration rod 6 penetrating into the ground, the winch 2 is free, the weight 4 is, for example, 100 kg, and the tip of the penetration rod 6 is For example, the hardness of the ground, that is, the ground bearing strength is measured according to the number of rotations when the body penetrates 25 cm.

The number of rotations is calculated by the numerical counter 11 described above.
Counted by. In the present invention, as described above, the lifting slider 3 is pulled up by using the winch 2. Therefore, when the winch 2 is free, a load is not applied to the wire 10, and the penetrating rod 6 is rotated by the recoil. This force is applied to the winch 2
Is not transmitted to Therefore, there is no danger that the winch 2 will rotate counterclockwise, and the operator will not be exposed to danger. Therefore,
Work can be done safely.

[0019]

As described above, according to the present invention, a predetermined load is applied to a vertically movable slider mounted on a vertically long frame so as to be vertically movable, and is driven to rotate, thereby penetrating the ground by its own weight. The penetrating rod as described above is attached, and this elevating slider is lifted by a wire using a winch, so that the following effects are obtained.

That is, the lifting slider applies a load to the wire only when it is lifted, makes the winch free, and during a test in which the wire is lowered by its own weight, the wire is slackened and no load is applied. No force is transmitted to the winch via this wire. Therefore, there is no danger that the winch will inadvertently rotate during the test, and the work of the penetration test can be performed safely without danger. In addition, the handle protrudes outside the frame as in the conventional case. Since there is no such operation, this operation is easy.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of an automatic penetration tester for ground strength investigation according to the present invention.

FIG. 2 is a front view of FIG.

[Explanation of symbols]

 S Automatic penetration tester for ground strength investigation 1 Frame 2 Winch 3 Elevating slider 4 Weight 5 Loading part 6 Penetrating rod 7 Rotating shaft 8 Motor

Claims (1)

(57) [Scope of request for utility model registration] A penetrating rod loaded with a predetermined load is driven to rotate, and the ground strength of the ground is measured based on the penetration size of the penetrating rod into the ground and the number of rotations at this time. In the automatic penetration test machine of the above, the automatic penetration test machine comprises a vertically long frame vertically suspended on the ground, a rotating shaft to which the upper end of the penetration rod is connected, a motor for rotating the rotating shaft, and a weight. A lifting part having a loading part capable of being placed thereon, the lifting slider being vertically movably attached to the frame, and a winch connected to the lifting slider via a wire; the lifting slider being a winch via the wire; In the test with the winch free, it descends only by its own weight, and the penetrating rod penetrates the ground. Automatic penetration testing machine for strength investigation.