JPS6021788Y2 - Spare blade holding device in a microtome spare blade holder - Google Patents

Description

[Detailed description of the invention] This invention is based on the application filed by Maegashira in 1983-172.
Regarding the improvement of No. 596 (Utility Model Publication No. 57-39786),
The purpose is to provide a holder that has a simpler structure and improved operability, and that can more reliably hold a replaceable blade.

(Prior art) Utility patent application No. 172596 (1972) filed by the applicant of the present application (
In Utility Model Publication No. 57-39786), the holding plate that presses the spare blade is attached to the retaining plate with two screws, so the two screws are not placed in the correct positions and the positions are incorrect. If it is misaligned, the presser plate will not be tilted evenly over its entire length, which may result in uneven pressure on the replaceable blade.

(Structure of the invention) The invention is such that the presser plate is pressed against the retainer plate by one support shaft and a guide rod passing through the support shaft.
Examples will be described below.

In FIGS. 1 to 5, a retaining plate 1 having a rectangular plane and a triangular cross section with an acute angle has a straight groove 3 along the longitudinal direction of the retaining plate 1 approximately in the center of its upper surface 2, and a straight groove 3 at the tip thereof. A straight groove 4, which is slightly shallower than the groove 3, is formed in each of the grooves 3 and 3.
A shaft hole 5 is bored between the groove 4 and the groove 4.

Circular spring seats 6 are formed on the upper surface 2 at positions slightly closer to the groove 4 on both sides of the shaft hole 5.

A circular counterbore hole 7 is provided on the lower surface side of the holding plate 1 and is concentric with the shaft hole 5.
is formed.

From the acute-angled tip 6 of the holding plate 1 to the groove 4, a smooth replaceable blade mounting surface 10 that is slightly lower than the upper surface 2 is formed by cutting or polishing by a height a corresponding to the thickness of the replaceable blade 9. When the replaceable blade 9 is placed on the replaceable blade mounting surface 10, the rear end surface of the replaceable blade 9 can uniformly abut against the side wall 11 of the groove 4.

A guide hole 12 penetrating through the groove 3 is bored in the rear end surface of the retaining plate 1 at the center in the longitudinal direction of the retaining plate 1, and an insertion hole 13 penetrating through the guide hole 12 is bored in the side surface of the retaining plate 1. , a female threaded portion 14 is formed in this insertion hole 13 .

A screw hole 15 passing through the insertion hole 13 is provided on the rear end surface of the end portion of the holding plate 1.
is provided.

The holding plate 16 has a plate shape with a rectangular plane.
A protrusion 17 that fits into the groove 3 of the holding plate 1 is provided on the lower surface of the rear end, and the rear edge of the protrusion 17 is obliquely removed to form an inclined surface 18.

The pressing portion 19 in front of the holding plate 16 has an upper surface formed into a wedge shape with an acute angle up to the tip 20 so that the replaceable blade 9 can be fixed to the lower surface of the pressing portion 19 to guide and cut the specimen.

The lower surface of the pressing portion 19 is formed into a flat surface so as to uniformly press the replaceable blade 9 placed on the replaceable blade mounting surface 10.

A recess 21 is formed between the lower surface of the pressing portion 19 and the protrusion 17.

The width of the holding plate 16 is set so that when the protrusion 17 is inserted into the groove 3 formed in the center of the holding plate 1, the tip 8 of the holding plate 1 and the tip 20 of the holding plate 16 are parallel to each other. , corresponds to the distance between the groove 3 in the center of the holding plate 1 and the tip 8.

An insertion hole 2 is provided in the center of the holding plate 16, penetrating from the upper surface to the lower surface.
2 is bored at a position corresponding to the shaft hole 5 of the holding plate 1.

A groove 23 is further formed in the upper surface of the holding plate 16 along the longitudinal direction.

This groove 23 is perpendicular to the insertion hole 22. The pin 24, which is slidably inserted into the guide hole 12 of the holding plate 1, has an inclined surface 2 at its tip that corresponds to the inclined surface 18 on the lower surface of the protrusion 17 of the holding plate 16.
5 is formed, and the opposite end face is cut at right angles to the axis.

A ball 26 made of steel or synthetic resin is inserted into the guide hole 12 and abuts against the pin 24 .

A conical part 27 abuts the ball 26 at the tip, a male threaded part 28 screwed into the female threaded part 14 of the holding plate 1 at the center, and an operating rod 30 having a narrow diameter part 29 formed at a position corresponding to the screw hole 15 is inserted. 1
3, and the female threaded portion 14 and the male threaded portion 28 are screwed together.

A set screw 32 with a male threaded portion 31 that is screwed into the threaded hole 15 is screwed into the threaded hole 15, and the small diameter portion 33 at the tip fits into the small diameter portion 29 of the operating rod 30, thereby locking the operating rod. We are taking measures to prevent the omission of 30.

In the figure, 34 is a spring, which is inserted into the spring seat 6 and is attached to the presser plate 16.
is biased to push up.

The support shaft 35 inserted into the shaft hole 5 of the holding plate 1 has a large diameter part 35a at the lower part corresponding to the counterbore hole 7, and an insertion hole 36 at the upper end at a position corresponding to the groove 23 of the holding plate 16. is provided, and the L-shaped guide rod 37 inserted into the groove 23 is inserted into the insertion hole 3.
6 to prevent the presser plate 16 from detaching.

(Operation of the invention) In order to hold the replaceable blade 9 in the holder of the invention, when the operating rod 30 is rotated counterclockwise, the operating rod 30 moves in the direction of escape, and the conical portion 27 at the tip of the operating rod 30 moves. is no longer in contact with the ball 26, and the protrusion 17 of the presser plate 16 is not pushed up by the pin 24.

Therefore, the press plate 16 is moved by the elastic force of the spring 34 to the press part 19.
is pushed up, and the pressing part 19 does not press the replaceable blade 9.

In this state, the replaceable blade 9 whose sharpness has deteriorated is removed from between the holding plate 1 and the presser plate 16, and a new replaceable blade 9 is inserted.

Since the presser plate 16 is pushed up by the spring 34, a gap is formed between the presser plate 16 and the replaceable blade mounting surface 10, so that the replaceable blade 9 can be easily inserted.

The newly inserted replaceable blade 9 brings its rear end surface into uniform contact with the side wall 11.

Next, the operating rod 30 is rotated clockwise to advance within the insertion hole 13, causing the conical portion 27 to come into contact with the ball 26, and when the operating rod 30 is further advanced, the ball 26 is pressed forward.

Since the ball 26 and the pin 24 move forward together, the protrusion 17 that comes into contact with the inclined surface 25 of the pin 24 is pushed up as the pin 24 moves forward.

When the protrusion 17 is pushed up, the presser plate 16 moves to the guide rod 37
It tilts slightly forward using the point of contact with the blade as a fulcrum, and the pressing part 19 strongly presses down the replaceable blade 9.

Incidentally, in the above embodiment, the presser plate 16 is tilted by the pin 24, but it can easily be done by other mechanisms, and the present invention is not limited to the embodiment.

(Effects of the invention) According to the invention, the holding plate can be tilted simply by operating the operating rod, and the pressing and releasing of the replacement blade can be carried out extremely easily, making replacement of the replacement blade easier.

When the pressure from the presser plate is released, the presser plate is pushed up slightly by the elastic force of the spring to form a gap between the replaceable blade mounting surface and the pressing part, making it easier to remove and insert the replaceable blade. Improved operability is possible.

Further, since it is easy to disassemble or assemble the holding plate and presser plate by simply pulling out the guide rod in the axial direction, cleaning after cutting the specimen can be easily carried out.

Furthermore, in this application, the presser plate is attached to the retainer plate by a single spindle, so even if the spindle is slightly misaligned, there will be no inconvenience in the tilting of the presser plate, and the replacement blade will be pressed evenly. , it becomes possible to cut specimens with accurate thickness.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the present invention-embodiment, Fig. 2 is a partially cutaway plan view, Fig. 3 is a sectional view taken along the line X-X of Fig. 2, and Fig. 4
The figure is a Y-Y line arrow view in Figure 2, and Figure 5 is a Z-Z view in Figure 2.
It is a line arrow view. Explanation of symbols of main parts, 1... Holding plate, 3, 4
...Groove, 5...Shaft hole, 9...
Spare blade, 10... Spare blade mounting surface, 16...
Holding plate, 17... Protrusion, 19... Pressing part, 22... Hole, 23... Groove, 34
...Spring, 35...Spindle, 37...
...Guide rod.

Claims (1)

[Claims for Utility Model Registration] ■ A holding plate 1' having a groove 3 formed in the center of the upper surface and a groove 4 formed in the tip, and a replaceable blade mounting surface 10 formed in the tip.
and a holding plate 16 having a protrusion 17 that fits into the groove 3 in the center of the holding plate 1 protruding from the lower surface of the rear edge, and a pressing part 19 of the replaceable blade 9 formed at the front end, A shaft hole 5 is bored between the groove 3 at the center of the holding plate 1 and the groove 4 at the tip, and the support shaft 35 is inserted therethrough, and an insertion hole 22 corresponding to the shaft hole 5 is formed in the upper surface of the holding plate 16. A groove 23 is formed to cross this insertion hole 22, and a guide rod 37 is inserted perpendicularly to the end of the support shaft 35 inserted from the shaft hole 5 into the insertion hole 22. A holding device for a spare blade in a microtome spare blade holder, characterized in that the holding plate 16 is installed in a groove 23 on the upper surface of the holding plate 16, and the holding plate 16 is tiltably attached to the holding plate 1. 2. A presser is placed between the lower surface of the presser plate 16 and the upper surface of the retainer plate 1 at a position forward of the groove 23 formed on the upper surface of the presser plate 16 and rearward of the groove 4 formed on the top end of the upper surface of the retainer plate 1. A replaceable blade holding device in a microtome replaceable blade holder according to claim 1, which is equipped with a spring 34 for pushing up the plate 16.