JP2003106957A - Knife folder for microtome - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knife folder capable of fixing a knife without causing distortion and easily placing a prepared cut piece on a slide glass without breaking it. SOLUTION: The knife folder for the microtome has a pressing plate 40 pressing the knife against a horizontal center part of a body plate 10. It is characterized by that cam faces 42 and 43 contacting tips of pressing rods are formed on right and left faces of the pressing plate so as to press the pressing plate against the body plate by thrusting the pressing rods 20 and 30 held by a body toward a center, and a step equal to a thickness of the slide glass is provided between a holding face of a cut piece holding part and a lower end of an inclined guide face of the cut piece formed in front of the pressing plate so that a top face of the slide glass placed on the holding face and the lower end of the inclined guide face are at substantially the same level.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a knife holder for attaching a knife to a microtome for cutting a sample with a thickness of several μm.

[0002]

2. Description of the Related Art In a conventional knife holder, a through hole is provided in the knife, and the knife is attached to the main body plate with a screw penetrating the through hole. When the knife is attached in this way, there is a difference in stress between the part pressed by the screw and the part separated from it, and the knife deforms when cutting a hard sample, and It was difficult to cut. Moreover, the cut pieces were extremely thin and were fragile and easily broken. For this reason, the cut pieces manufactured with great care often break when they are carried to an observation instrument such as a slide glass, which often makes accurate observation impossible.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a knife holder which can be fixed without causing distortion in the knife. A second problem is to provide a knife folder that can easily be placed on a slide glass without breaking the manufactured cutting pieces.

[0004]

[Means for Solving the Problems] The first object is to provide a knife holder for a microtome having a pressing plate for pressing a knife in the left and right central portions of the main body plate, and the pressing rod held in the main body is directed toward the center. By pushing in,
The present invention has been solved by adopting a configuration characterized in that left and right surfaces of the pressing plate are formed with cam surfaces that come into contact with the tip end portion of the pressing rod so that the pressing plate is pressed against the main body plate.

With this structure, since the knife is fixed to the main body by the cam surface and the press receiving of the pressing plate by the pressing rod, the stress is not partially increased by penetrating the knife. Therefore, even when a hard sample is cut, the linearity can be maintained over the entire length, and the sample can be cut with an extremely accurate thickness.

The second problem is that in the knife holder for a microtome, which comprises a pressing plate for pressing a knife on the left and right central portions of the main body plate, and a cutting piece holding part mounted on the front surface of the pressing plate, the pressing plate is used. A step equal to the thickness of the slide glass is provided between the lower end of the guide inclined surface of the cutting piece formed on the front surface of the cutting piece and the holding surface of the cutting piece holding portion,
This has been solved by adopting a configuration characterized in that the upper surface of the slide glass placed on the holding surface and the lower end of the guide inclined surface are at substantially the same level.

With this construction, the cutting piece can be moved onto the slide glass while being transferred to the pressing plate surface by using a brush or the like, and the cutting piece is sandwiched and lifted by something like tweezers. It was possible to place the manufactured cutting piece on an observation tool without such a situation. This has made it possible to carry fragile cutting pieces to the observation instrument without breaking them.

[0008]

DETAILED DESCRIPTION OF THE INVENTION

[Embodiment 1] FIGS. 1 to 9 and 15 show an embodiment of a knife holder for solving the first problem, which will be described in detail below. (10) is a body plate, and an inclined receiving surface (11) for attaching a knife (K) is provided in the center portion on the right and left sides
Is formed. The upper end of the body plate (10) on which the inclined receiving surface (11) is formed is sharply formed so that the body plate does not hit the sample. A knife holding bar (12) is fixed to the upper and lower central portions of the inclined receiving surface (11). The knife holding bar (12) supports the lower end of the knife (K) to be held. The through holes (13) formed on the left and right of the body plate (10) are mounting holes for mounting auxiliary tools such as a blade card (not shown).

Presser bars (20) and (30) are held on the wall surfaces on the left and right of the inclined receiving surface (11). One presser bar (20) is penetrated and held in the main body plate (10). A screw portion (23) provided at the center of the pressing rod (20) can be moved left and right when the knob (21) is rotated. The other pressing rod (30) is embedded and fixed in the body plate (10). The tip portions (22) and (31) of each of the pressing rods (20) and (30) are formed in a cone shape.

A pressing plate (40) presses the knife (K) against the inclined receiving surface (11). An inclined guide surface (41) for guiding the cutting piece is formed in the upper central portion. The upper end of the pressing plate (40) provided with the inclined guide surface (41) is formed to be sharp so that the cutting piece can reach the guide surface (41) without being caught. Cam surfaces (42) and (43) are formed on the left and right side surfaces. The cam surfaces (42) and (43) project the tip portions (22) and (31) of the pressing rods (20) and (30), and the pressing rods (20) are moved inward, whereby the pressing plate ( It is formed so as to be pressed against the main body plate (10) while moving 40) to the left side in FIG. Further, the groove (44) into which the knife holding bar (12) is inserted maintains the relative vertical position between the pressing plate (40) and the main body plate (10) in this pressing operation.

Reference numeral (50) is a cutting piece holding portion, which is attached to the front surface of the pressing plate (40) and is provided with a recess (51) whose side is open to the pressing plate (40). It is possible to store cutting pieces that are cut by the knife (K) and fall along the inclined guide surface (41) in the recess (51). For example, if water is stored in this recess (51), a cutting piece with a low specific gravity can be floated and stored, and accidents such as damage to the cutting piece due to its own weight or the weight of other overlapping cutting pieces can be prevented. can do.

As described above, the pressing rods (20) (3
By sandwiching the pressing plate (40) from the left and right with (0), the knife (K) can be sandwiched and held between the main body plate (10) and the pressing plate (40).

[0013]

[Embodiment 2] FIGS. 10 and 11 show an embodiment of a knife folder which solves the second problem, and the details thereof will be described below. In the present embodiment, the bottom surface (62) of the recess (61) of the section holder (60) having the same shape as the cutting piece holder of the first embodiment is deepened by the height (L). This height (L) is substantially equal to the thickness of the slide glass (P) to be used, and the lower end (4) of the inclined guide surface (41).
The tip of the slide glass (P) is fitted between 3) and the bottom surface (62).

By doing so, there is no step when moving the cutting piece (M) from the inclined guide surface (41) to the slide glass (P), so it is necessary to lift the cutting piece (M) with tweezers or the like. Is gone. Other configurations are
The detailed description is omitted because it is the same as the first embodiment.

[0015]

[Third Embodiment] FIGS. 12 to 14 show another embodiment of a knife holder for solving the second problem, which will be described in detail below. In this embodiment, the cutting piece holder is a slide glass mount (70). A step (L1) is provided between the slide glass receiving surface (71) of the mounting table (70) and the lower end (43) of the inclined guide surface (41). This step (L1) is a slide glass (P)
The thickness of the inclined guide surface (41)
Since there is no step when the cutting piece (M) is moved from the slide glass (P) to the slide glass (P), it is not necessary to lift the cutting piece (M) with tweezers or the like. The other structure is the same as that of the first embodiment, and detailed description thereof will be omitted.

[0016]

Since the present invention is constructed as described above,
Since the knife (K) to be used can be pressed uniformly over the entire length easily and reliably, even when cutting a hard sample, the knife (K) is not deformed and extremely high precision cutting can be realized. did it. Further, since it becomes possible to move the cut thin and brittle cutting piece (M) onto the slide glass (P) without lifting, the manufactured cutting piece can be moved to the observation position without breaking. It became so.

[0017]

[Brief description of drawings]

FIG. 1 is a plan view showing a first embodiment.

FIG. 2 is a front view showing the first embodiment.

FIG. 3 is a rear view showing the first embodiment.

FIG. 4 is a bottom view showing the first embodiment.

FIG. 5 is a left side view showing the first embodiment.

FIG. 6 is a right side view showing the first embodiment.

7 is a sectional view taken along line AA of FIG.

8 is a sectional view taken along line BB of FIG.

9 is a sectional view taken along line CC of FIG.

FIG. 10 is a vertical cross-sectional right side view showing the second embodiment.

11 is an enlarged view of a portion surrounded by a D circle in FIG.

FIG. 12 is a vertical cross-sectional right side view showing the third embodiment.

FIG. 13 is an enlarged view of a portion surrounded by an E circle in FIG.

FIG. 14 is a plan view showing a third embodiment.

FIG. 15 is a vertical cross-sectional right side view showing a usage state of the first embodiment.

[Explanation of symbols]

10 Body plate 11 Inclined receiving surface 12 knife holding bar 13 through holes 20 pressure rod 21 knob 22 Tip 23 Screw part 30 pressure rod 31 Tip 40 holding plate 41 Inclined guide surface 42 Cam surface 43 Cam surface 44 groove 45 Lower end of inclined receiving surface 50 Cutting piece holder 51 recess 60 Cutting piece holder 61 recess 62 Bottom 70 Slide glass stand 71 Slide glass receiving surface L step L1 step P slide glass M cutting piece K knife

Claims (2)

[Claims] 1. In a knife folder for a microtome, which has a pressing plate for pressing a knife at the center of the main body plate on the left and right sides, the pressing plate held on the main body is pushed toward the center so that the pressing plate is attached to the main body plate. A knife folder for a microtome, characterized in that left and right surfaces of the pressing plate are formed with cam surfaces that come into contact with the tip end portion of the pressing rod so as to be pressed. 2. A microtome knife folder comprising a pressing plate for pressing a knife on the left and right central portions of a main plate, and a cutting piece holding part mounted on the front surface of the pressing plate, which is formed in front of the pressing plate. A step equal to the thickness of the slide glass is provided between the lower end of the guide inclined surface of the cutting piece and the holding surface of the cutting piece holding portion, the upper surface of the slide glass placed on the holding surface and the lower end of the guide inclined surface. Knife folder for microtome characterized by being set to almost the same level