JPS6331045B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a core bit mounting device for a core sampling machine that has an extremely simple structure and is extremely easy to operate, yet is capable of quickly and smoothly loading and unloading core bits into the core sampling machine. It is related to.

In recent years, research and development of nuclear power has progressed dramatically.
The implementation of nuclear power is progressing in many areas of society in order to make peaceful use of its superior performance. One of the peaceful uses of nuclear power is to use the neutron diffraction phenomenon to irradiate various samples such as rocks, ceramics, and concrete with neutrons, and observe the texture and structure of these samples. There is.

However, in order to obtain a test piece more suitable for observation from a sample, it is first necessary to collect a core from the sample. The core extraction machine must be controlled remotely by an artificial hand called a manipulator inside the concrete cell.

However, with the conventional core bit installation device, when installing the core bit on the main shaft of the core sampling machine,
The male screw part formed above the core bit is screwed into the female screw part formed in the spindle, and the core extractor uses a large force to unscrew the core bit, which is firmly screwed in, due to the drilling resistance of the core ring. Therefore, it is difficult to attach the core bit to the core sampling machine with the screw type core bit mounting device as described above, and with a manipulator whose operating range is structurally limited and the core bit cannot be screwed into the main shaft. It was difficult, and furthermore, it was impossible to remove the core bit from the main shaft, which had become firmly screwed in due to the drilling resistance during coring, so a core extractor was used inside the concrete cell. Therefore, in reality, it is impossible to collect cores from samples that have been irradiated with neutrons. Therefore, it is difficult for researchers to easily load and unload core bits into core collection machines using manipulators. There has been a strong desire for the emergence of a core bit mounting device in a core sampling machine that can do this.

The present invention has been devised based on a completely new idea in order to eliminate these drawbacks in view of the above-mentioned actual situation, and its purpose is to In addition to embedding a magnet and disposing a locking protrusion that protrudes downward, a fitting part that fits into the communication hole of the main shaft is formed in the upper part of the core bit that is attached to the main shaft, and the fitting part A long groove into which the locking protrusion is fitted is formed in the base end of the shaft, and the rotational force of the main shaft is transmitted to the core bit through cooperation between the attractive force of the magnet and the locking force of the long fit-in groove. As a result, it is now possible to easily and quickly load core bits into a core sampling machine even if the manipulator is completely unable to load and remove core bits into a core sampling machine due to its structure with conventional screw type core bit loading devices. Concrete
It is an object of the present invention to provide a core bit mounting device in a core sampling machine that enables the core sampling machine to be used in a cell by remote control using a manipulator, and that can collect cores from a sample that has been irradiated with neutrons. That is.

To explain the configuration of the present invention with reference to an embodiment shown in the drawings, 1 is a table of a core sampling machine, on which a vise 2 for fixedly placing a sample A is equipped; A column 3 is erected at one end of the table 1, and a spindle head 4 is provided horizontally protruding from one side of the upper end of the column 3. A main shaft 5 is vertically disposed at the tip of the main shaft head 4 so as to be vertically movable and rotatable, and a communication hole 6 is vertically bored in the axis of the main shaft 5. The portion below the approximately middle portion is formed into a tapered shape with the upper end contracted and the lower end expanded. Also, magnets 7, 7, etc. are placed on the lower end surface of the main shaft 5, with the axis of the main shaft 3 as the center.
A suitable number of locking protrusions 9, 9 are embedded in a radial pattern, and locking protrusions 9, 9 projecting downward by bolts 8, 8 are provided at opposing positions across the axis of the main shaft 5.

Reference numeral 10 denotes a core bit, the lower end of which forms a cutter portion 10a, the upper portion of which is formed with a fitting portion 10b whose upper end is reduced and whose lower end is enlarged so that it can be smoothly fitted into the communication hole 6, A circular disk portion 10c having a diameter larger than the outer diameter of the cutter portion 10a and an appropriate thickness is formed at the base end of the joint portion 10b. A fitting portion 1 is provided on the disc portion 10c.
Long grooves 10d, 10d are formed facing each other across the fitting portion 10b so that the locking protrusions 9, 9 can be inserted into the connecting hole 6 when the holder 0b is inserted into the communication hole 6.

Note that when the core bit 10 is mounted on the main shaft 5, the structure is such that a gap a is created between the lower end surface of the main shaft 5 and the upper end surface of the disc portion 10c.
This gap a prevents the core bit 10 from falling off from the spindle 5 even if the spindle 5 is rotated at high speed when the core bit 10 is attached to the spindle 5 and performs core collection work, and also allows the core bit 10 to be placed on the spindle by the manipulator B. The attraction force of the magnets 7, 7...... and the core bit 10 can be easily removed from
It is determined by taking the weight of the

Next, the operation of the present invention constructed as described above will be explained.

Sample A that has now been irradiated with neutrons inside the nuclear reactor
To collect a core from a concrete cell, first, sample A is fixed by operating a manipulator B in a vise 2 fixed on a table 1 of a core sampling machine installed in a concrete cell. Next, the core bit 1 to be used is further operated by the manipulator B.
0, position it directly below the main shaft 5 of the core extraction machine, and move it upwards by the manipulator B, the fitting part 10b of the core bit 10 will fit into the communication hole 6 drilled in the main shaft 5. Insert, but
Since the lower part from the approximate middle part of the communicating hole 6 is tapered like the fitting part 10b of the core bit, the fitting part 10b is smoothly guided into the communicating hole 6, and the locking protrusion 9, 9 is also fitted into the long fitting grooves 10d, 10d, and the attractive force of the magnets 7, 7... embedded in the lower end surface of the main shaft 5 acts on the upper end surface of the disc 10c, allowing the main shaft to be easily, quickly and reliably inserted. A core bit 10 is attached to 5. Therefore, even if the main shaft 5 is rotated at high speed, the core bit 10 will not fall off from the main shaft 5, and even if the rotating core bit 10 is brought into contact with the sample A fixedly mounted by the vise 2, the core bit 10 will not fall off. The locking protrusions 9, 9 of the main shaft 5 are core bits 10.
Since it is inserted into the insertion long grooves 10d and 10d,
There is no fear that the core bit 10 will not rotate due to the resistance generated during drilling, and the drilling operation can be carried out extremely well. After collecting the core, when removing the core bit 10 from the spindle 5, remove the core bit 10 with the manipulator B.
The core bit 10 can be easily and quickly removed from the main shaft 5 by simply holding the core bit 0 and pulling it down.

In addition, in the above example, the operation of loading and unloading the core bit 10 into the core collecting machine by remote control of the manipulator B in the concrete cell was shown, but it is assumed that the sample A from which the core is collected has not been subjected to neutral irradiation. In this case, the core bit 10 may be inserted and removed manually as in the past, and in this case, it is of course much easier and faster than the conventional screw type core bit mounting device. .

In short, in a core extraction machine having a spindle head which is formed by vertically movable and rotatably a spindle having a communication hole in the vertical direction of the spindle, a magnet is embedded in the lower end surface of the spindle, and a magnet is embedded in the lower end surface of the spindle. In addition to disposing a protruding locking protrusion, a fitting part that fits into the communication hole is formed in the upper part of the core bit that is attached to the main shaft, and the locking part is provided at the base end of the fitting part. Since the projecting body is configured to have a long groove for insertion and to transmit the rotational force of the main shaft to the core bit through the cooperation of the attraction force of the magnet and the locking force of the long groove for insertion, the core bit is installed in the core extraction machine. If so, simply insert the core bit into the communication hole drilled in the main shaft.
After that, it can be completely connected and fixed to the main shaft using the attraction force of the magnet and the locking force of the long groove, and when removing the core bit from the main shaft, it is an extremely simple operation of simply pulling the core bit downward. The core extractor can be used in work environments where a manipulator must be used, and it is also possible to remove cores from samples that have been irradiated with neutrons, which was previously impossible. It has an extremely useful novel effect of being able to obtain a specimen suitable for observing the tissue and structure of the material.

[Brief explanation of the drawing]

The drawings show an embodiment of a core bit mounting device in a core sampling machine according to the present invention, in which FIG. 1 is an overall perspective view of the core sampling machine equipped with a core bit, FIG. 2 is a front view of the main parts, FIG. 3 is a longitudinal sectional view of the main part, and FIG. 4 is a perspective view of the entire core bit. In the figure, 1...Table, 2...Vise, 3...Column, 4...Spindle head, 5...Spindle, 6...Communication hole, 7...Magnet, 9...Locking protrusion, 10 . . . core bit, 10b . . . fitting portion, 10d . . . fitting long groove.

Claims (1)

[Claims] 1. In a core extractor having a spindle head, which has a spindle head that is vertically movable and rotatably provided with a spindle having a communication hole in the vertical direction of the spindle, a magnet is embedded in the lower end surface of the spindle and protrudes downward. In addition to disposing a locking protrusion, a fitting part that fits into the communication hole is formed in the upper part of the core bit that is attached to the main shaft, and the locking protrusion is provided at the base end of the fitting part. A core bit installation in a core extraction machine, characterized in that a long insertion groove is bored, and the rotational force of the main shaft is transmitted to the core bit by cooperation of the attractive force of the magnet and the locking force of the insertion long groove. Device.