JPH026346Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Field of industrial application The invention relates to a device for preparing specimens or sample sections for microscopic observation of tissues of plants, such as leaves and stems, especially in experimental training in science education at schools. It is something.

(b) Prior art A simple microtome is a sample section preparation device of this type, but when making a section of a plant leaf, for example, it is difficult to
This is fixed and held in the main body of a production device with a fixed stand, and the leaf is cut into thin sections along with the core material using a knife held in the hand (a safety razor blade). .

However, this kind of cutting work is very delicate manual work, and if you are not clumsy, you may cut your fingertips because you are holding the knife in your hand. There are also defects that make it difficult to fabricate.

(c) Purpose The present invention eliminates the above-mentioned conventional defects and provides a section preparation device that is safe and easy to prepare.

(d) Configuration The feature of the sectioning device of the present invention is that the cutting tool is held in the main body and the sample is moved relative to the cutting tool using a core material to perform cutting.

That is, a sliding surface is provided above the main body for moving the core material that holds the sample while keeping its ends in contact with each other, and on the other hand, near the end of this sliding surface, there is a height of the cutting edge relative to the sliding surface. The blade is movably held relative to the main body so that its position can be changed. Then, the section cut by the knife can be dropped into a space formed below the edge of the knife, that is, the sliding surface, and taken out.

By changing the height position of the cutting edge relative to the sliding surface, the thickness of the section can be adjusted and a section with a desired thickness can be produced.

Furthermore, a cover that covers the sliding surface is removably provided above the main body, and this cover is perforated so that a movement guide groove for the core material that holds the sample extends in a direction diagonal to the edge of the knife. It is set up.

(e) Examples The illustrated embodiment will be described below.

In the figure, 1 is a main body forming a frame with a space formed inside, and 2 is a cover. 1F,1
F' is a top plate constituting the main body, which is shown integrally with the frame in FIG. 2, but a sliding surface 1S for the sample is formed on the top surface of the top plate 1F, as described later. The protruding piece 1K attached to the top surface of the top plate 1F is
This is a member for fitting the cover 2 onto the frame 1.

As is clear from FIG. 1, the upper plates 1F and 1F' are placed on the frame 1 with a certain interval in the middle, and a cutter is held between them. A recess 1M for guiding the direction of movement of the sample is formed in the top plate 1F', and this recess 1M matches a sample movement guide groove 2M formed in the cover 2. Further, as shown in the side view of FIG. 2C, an opening 1H is provided on the right side of the frame 1, and a container 9 for receiving a sample section is inserted into and taken out from the inside of the frame 1. With the container 9 inserted, the section is allowed to fall into the container 9 from above and be accommodated therein.

The cutter 7 is located between the top plates 1F and 1F' in FIG. 1, that is, as shown in the vertical cross-sectional view B in FIG.
The knife is held in a knife holder 3 disposed in an opening formed above the frame 1 . The cutter 7 is a plate-shaped cutter such as a safety razor, for example, and is held in a groove 3M formed in a head portion 3H at the top of the cutter holder 3.

The knife holder 3 has a rectangular outer shape so as to occupy the entire area of the opening above the frame 1, and has a head portion 3H formed on both sides at the top and a guide portion 3G for a tilting mechanism at the bottom. , a hole 3C for being pivotally supported by the main body 1 is bored in the middle stage (fourth hole).
figure). 4 penetrates the frame 1 of the main body with its support shaft and is screwed into this hole 3C, so that the knife holder 3 is supported from both sides by the support shaft 4 and can be swung around this support shaft 4. It is becoming possible to move.

As shown in FIG. 6, the cutter 7 is inserted into the groove 3M from the side and is clamped and fixed by a fixing screw 8. Cutter knife blade (10cm x 1cm) for knife 7
When using a knife, the blade may spill, but in that case, loosen the fixing screw 8 and replace the knife.

An engagement groove 3S having a circular cross section is formed in the vertical direction in the guide portion 3G that is integrally formed with the blade holder 3, and a sphere 5B attached to the tip of the adjustment rod 5 is engaged with this groove. (Figure 7).

FIG. 7 is a schematic diagram showing the relationship between the frame 1 of the main body, the blade holder 3, and a mechanism for displacing (tilting) the blade holder 3. The adjustment rod 5 has a threaded portion 5N that is screwed into a hole 1N drilled in the frame 1, passes through the frame 1, and is provided with a knob 5T on the outside. 6 is a rock nut.

When the lock nut 6 is loosened and the knob 5T is turned, the adjustment rod 5 is displaced relative to the frame 1, and the blade holder 3 is tilted around the spindle 4. When the lock nut 6 is tightened at that position, the blade holder 3 is moved to its position. It is held fixed at the same angle of inclination (Fig. 2B).

When the inclination angle of the knife holder 3 is changed, the height of the cutting edge relative to the sliding surface 1S changes because the cutting edge of the knife 7 is located near the end of the sliding surface 1S as shown in FIG. Become. The thickness of the section of the sample S can be adjusted by changing the height of the cutting edge.

Figure 8A shows a leaf sample S buried in core material (elderberry) K, and Figure 8B shows a stem sample S buried in core material K. From the state shown in Fig. 8A and B, sample S is replaced with core material K.
The core material K is cut flush with the upper end surface of the cover 2 so that the sample is embedded in the core material, and the core material K is inserted into the movement guide groove 2M of the cover 2 with the buried end of the sample S facing downward. Then, with its lower end in contact with the sliding surface 1S, the core material is moved on the sliding surface 1S along the movement guide groove 2M while slightly pushing downward. As mentioned above, since the movement guide groove 2M is formed in a direction oblique to the cutting edge side of the lower cutter, the core material K on the sliding surface 1S is not perpendicular to the cutting edge side of the cutter but obliquely. Since the core material moves in the direction, the core material moves along the edge of the cutting edge.In other words, the edge of the cutting edge moves relative to the core material (sample) so that the core material K and the sample S Cut into thin pieces. The cut pieces fall through the space below the blade 7 and are stored in the container 9. The prepared section is taken out from the container by pulling out the container 9.

As described above, the present invention is characterized in that the cutter is held in the main body, and the height of the cutting edge of the cutter relative to the sliding surface of the core material can be changed.
In the illustrated example, the height of the cutting edge is adjusted by tilting the cutting tool holder, but instead of tilting, the height of the cutting edge can be adjusted by linearly displacing it in a direction perpendicular to the sliding surface or at a certain angle. It is also possible to do this. The configuration of the main body having a space inside is not limited to the illustrated example, and the method for taking out sections is not limited to the method of taking out and taking out the container. It may be possible to accommodate the

(f) Effects The sample sectioning device of the present invention can perform cutting operations safely, and can improve the safety of science experiments at schools. In addition, core material (sample)
moves in a diagonal direction with respect to the edge of the knife, so the sample is scraped by the knife, making it possible to cut the sample into thin sections, and the tilting mechanism of the knife holder allows the thickness of the section to be adjusted. The thickness can be easily adjusted, and many sections of the same thickness can be easily produced, and by changing the cutting edge, very thin sections of, for example, around 50 microns can be obtained, giving excellent practical effects. ing.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 A is a plan view, B is a longitudinal front view, C is a right side view, Fig. 3 is a view showing the cover, and Fig. 4 is a cutter holder. In the diagram showing the configuration of the stand, A is a vertical side view, B is a plan view, and the fifth
FIG. 6 is a diagram showing the relationship between the knife and the sliding surface, FIG. 6 is a diagram showing the relationship between the knife and the knife holder, and FIG. 7 is a schematic perspective view showing the tilting mechanism of the knife holder relative to the main body.
FIGS. 8A and 8B are diagrams showing the state in which two types of samples are held on the core material. K... Core material, S... Sample, 1... Main body frame,
1F, 1F'...Top plate, 1H...Opening, 2...
Cover, 2M...Movement guide groove, 3...Knife holder, 3M...Groove, 3H...Head section, 3G...Guide section, 3S...Spherical groove, 4...Spindle, 5...Adjustment rod , 5T...Knob, 6...Lock nut, 7...Knife, 8...Fixing screw.

Claims (1)

[Claims for Utility Model Registration] A sliding surface is provided above which the end surface of the core material in which the sample is embedded and held slides against it, and a space is formed below the edge of this sliding surface. a main body; a knife holder for holding a plate-shaped knife with a cutting edge positioned near an edge of the sliding surface; and a knife holder that tilts the knife holder with respect to the main body to prevent the sliding of the blade surface of the plate-shaped knife. A knife holder tilting mechanism that changes the height of the cutting edge side of the knife with respect to the sliding surface by changing the inclination angle with respect to the surface, and a removable cover that covers the sliding surface of the main body, the cover having: A sample sectioning device characterized in that a movement guide groove through which a sample holding end of a core material in which a sample is embedded and held is inserted is bored so as to extend in a direction diagonal to the cutting edge side of the cutter.