JPS5934602Y2 - portable cone penetrometer - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a portable cone penetrometer used to determine whether a vehicle can pass through a soft ground area, or to determine so-called trafficability.

A conventional portable cone penetrometer is designed as shown in Fig. 1. A rod d having a cone C at the tip is provided on the lower side of a load detection part consisting of a proving ring a and a dial gauge b, and a rod d on the upper side is provided with a cone C at the tip. It is constructed by combining the handle e.

When measuring the cone index, hold the handle e and press it downward, and then measure the pressing load and the penetration of the cone C by detecting the distortion of the proving ring a with the dial gauge b. It is measured by determining the depth.

However, in the conventional method described above, when making measurements, it is necessary to read the scale of dial gauge b and the penetration depth of cone C separately, and therefore even simple measurements as described above currently require two people to perform the measurement. The problem was that it had to be done by a person.

Furthermore, since the conventional example described above uses a static continuous press-fitting method using input, variations in the cone penetration speed are likely to occur.

The standard penetration speed of this type of cone penetrometer is 1 cm/see, but as mentioned above, since the penetration speed is manually applied, errors may occur in the measured values of the cone support force due to variations in the penetration speed. be.

The present invention was developed in consideration of the above-mentioned problems, and aims to provide a portable cone penetrometer that can perform measurements quickly with one worker and prevent variations in penetration speed. .

The configuration will be explained below based on the embodiment shown in FIG.

In the figure, reference numeral 1 denotes a guide frame placed on the ground, and a portable cone penetrometer 2 is supported on this guide frame 1 so as to be slidable in the vertical direction.

A scale 3 is provided on the support of the guide frame 1 so as to be movable in the vertical direction.

The above-mentioned portable cone penetrometer 2 is composed of a handle 4, a dial gauge 5, a proving ring 6, a rod 7, and a cone 8 like the conventional one. A reflector 9 is provided so that the operator can see the scale of the dial gauge 5, and a pointer 10 corresponding to the scale 3 is engraved on the handle 4.

Reference numeral 11 denotes a speed pacer provided on the guide frame 1, and this speed pacer 11 is connected to the scale 3 via a reduction gear 12.

The speed of the reduction gear 12 is set so that the scale 3 moves at a rate of 1 cm per second.

However, during measurement, when a load is applied to both ends of the handle 4, the cone 8 penetrates into the ground depending on the supporting force of the ground, but at this time the handle 4 is guided by the guide frame 1 to prevent it from swinging sideways. Ru.

The amount of penetration during this measurement is measured by moving the handle 4 downward for a predetermined time in accordance with the movement of the scale 3, and the load can be determined by reading the displacement of the dial gauge 5 reflected by the reflector 9. can be carried out by one worker.

Furthermore, the penetration speed at this time becomes the moving speed of the scale 3, and variations are prevented.

The present invention is as described above, and a portable cone penetrometer 2 consisting of a handle 4, a dial gauge 5, a proving ring and rod 7, a cone 8, etc. is supported in a slidable manner on a guide frame 1, and a lower part of a proving ring 6 is supported. A reflector 9 that allows a worker who operates the handle 4 to see the scale of the dial gauge 5.
Furthermore, a scale 3 movable in the operating direction of the handle 4 was provided on the guide frame 1, and this scale 3 was connected to a speed pacer 11 provided on the guide frame 1 to constitute a portable cone penetrometer. From this, the penetration depth of the cone 8 and the scale reading of the dial gauge 5 are 1.
In addition, the guide frame 1 prevents lateral vibration during measurement, and the cone index can be measured quickly and accurately by one operator.

In addition, in the above configuration, by moving the scale 3 provided on the guide frame 1 at a predetermined speed by the speed pacer 11, the penetration speed of the cone 8 can be made constant according to the speed pacer 11, thereby preventing variations in measured values. can.

[Brief explanation of the drawing]

FIG. 1 is a front view of a conventional portable cone penetrometer, and FIG. 2 is a front view of a portable cone penetrometer according to the present invention. 1 is a guide frame, 2 is a portable cone penetrometer, 3 is a scale, 4 is a handle, 5 is a dial gauge,
6 is a proving ring, 7 is a rod, 8 is a cone, 9
is a reflector, and 11 is a speed pacer.

Claims (1)

[Scope of utility model registration request] A portable cone penetrometer 2 consisting of a handle 4, a dial gauge 5, a proving ring, a rod 7, a cone 8, etc. is slidably supported on a guide frame 1, and a worker who operates the handle 4 is provided at the bottom of the proving ring 6. A reflector 9 is provided so that the scale of the dial gauge 5 can be seen, and a scale 3 that is movable in the direction of operation of the handle 4 is provided on the guide frame 1; A portable cone penetrometer characterized in that it is connected to a speed pacer 11.