JPH03255332A - Preparing apparatus for specimen - Google Patents

Abstract

PURPOSE:To compact the upper layer and the lower layer of a material uniform ly by moving a base and a formwork together up and down with buffer body when the material is compacted by compression and shaking with a weight and shaker. CONSTITUTION:A base 6 is mounted on the horizontal plate of an L-shaped frame 4 through a buffer body 5 comprising rubber and coil springs. A formwork 1 is mounted on the base 6. A shaker 3 is mounted on a material 2 in the formwork 3. One end of a lever 7 is rotatably pivoted on the vertical plate of the frame 4. The shaker 3 is suspended from the lever 7. A weight 8 for generating the intended static load is suspended at the free end of the lever 7. In this constitution, the material 2 is compacted by compression and shaking with the weight 8 and the shaker 3. Then, the base 6 and the formwork 1 are moved up and down together with the buffer body 5. The material 2 in the formwork can be uniformly compacted not only at the upper layer but also at the lower layer by the moving action.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to an apparatus for preparing specimens, particularly for preparing specimens such as ultra-hard mixed concrete and asphalt pavement.

[Conventional technology]

Conventional specimen preparation equipment for making and testing specimens for asphalt pavement, super-stiff concrete dams, etc. has been used to place specimens in a box-shaped formwork 1 with an opening on the top, as shown in Figure 2. A material 2 such as asphalt or concrete to be formed is placed, a vibrator 3 is placed on top of the material 2, and a worker presses the vibrator 3 with his/her hand from above while operating the vibrator 3 to generate a material weighing approximately 50 kg. The material 2 is compacted by this vibration and pressure, and after the material 2 is compressed to a desired height within the formwork 1, it is cured to obtain a specimen. .

[Problem to be solved by the invention]

However, in the above-mentioned conventional specimen preparation apparatus, the operator applies pressure directly, which not only makes the work extremely troublesome, but also the applied pressure is not constant, and furthermore, the material 2 in the formwork 1
Although only the upper layer was compacted, the lower layer was insufficiently compacted and uneven, making it impossible to obtain correct specimens.

The present invention seeks to eliminate the above-mentioned drawbacks.

[Means to solve the problem]

The specimen preparation device of the present invention includes a formwork into which specimen material is placed;
A buffer body that supports the lower surface of the formwork, a vibrator that applies an excitation force to the material inserted into the formwork from above, a cantilever lever for suspending the vibrator, and It is characterized by consisting of a weight connected to the free end of the lever.

[For production]

In the specimen preparation apparatus of the present invention, a predetermined static load is constantly and stably applied to the material, and the formwork itself also moves up and down due to vibration.

〔Example〕

The present invention will be explained in detail below with reference to the drawings.

In the present invention, as shown in FIG. 1, a base 6 is placed on a horizontal plate of an L-shaped machine frame 4 via a buffer 5 such as rubber or a coil spring, and a formwork 1 is placed on this base 6. At the same time, the vibrator 3 is placed on the material 2 in the form l, and a lever 7 is rotatably supported at one end on the vertical plate of the machine frame 4.
A weight 8 for generating a desired static load is suspended from the free end of the lever 7.

[Effects of the Invention] Since the specimen preparation device of the present invention has the above-described configuration, when the material 2 is compacted by pressure and vibration using the weight 8 and the vibrator 3, the buffer body 5 causes the base 6 to be compacted. At the same time, the formwork 1 also moves up and down, and this action allows the material 2 in the formwork 1 to be compacted uniformly not only in the upper layer but also in the lower layer.

In addition, by replacing the weight 8, it is possible to apply any static load extremely easily and uniformly, and furthermore, the insertion of the material 2 into the formwork 1 and the removal of the formwork 1 are performed by moving the free end of the lever 7 upward. There are great benefits to industrial engineering, such as the fact that it can be carried out extremely easily by rotating it.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a specimen producing apparatus of the present invention, and FIG. 2 is an explanatory diagram of a conventional specimen producing apparatus. 1... Formwork, 2... Material, 3... Vibrator, 4...
・Machine frame, 5...buffer, 6...base, 7...lever, 8...weight.

Claims (1)

[Claims] (1) A formwork into which the specimen material is placed, a buffer that supports the bottom surface of the formwork, a vibrator that applies an excitation force to the material inserted into the formwork from above, and this vibrator. A specimen preparation device comprising: a cantilever lever for suspending the specimen; and a weight connected to the free end of the lever.