JPS6214835Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dowel pin planting machine, and particularly to a dowel pin planting machine that plants a plurality of dowel pins in a tooth profile model formed based on a tooth profile formed on an impression.

In the processing of dentures, etc., dowel pin planting work involves planting multiple dowel pins on a tooth profile model that is formed based on a pre-formed impression of the tooth profile.
It is required that the dowel pins be planted approximately at the center of each tooth profile part of the tooth profile model and parallel to each other. Conventionally, various devices have been devised to meet this requirement.

For example, a dowel pin planting machine is known in which a dowel pin to be planted on a tooth profile model is attached to a holder, and the holder is held between flexible arms with clips. In this type of planting machine, the holder is moved by manually moving the arm to position the dowel pin, but it is difficult to precisely align the dowel pin with the center of the tooth profile formed on the impression using only the flexible arm. It was difficult to make small movements skillfully. In reality, in order to match the tooth alignment of various shapes and sizes, multiple planting machines are prepared, and each arm is
Each adjustment had to be made one by one, which was time-consuming. In addition, although it is easy to position the dowel pins on one holder, it is difficult to support each holder by positioning the dowel pins attached to each holder in parallel to each other. Since each arm was adjusted separately, it required a great deal of time and skill.

This invention was created in view of the above points, and the purpose of this invention is to accurately position multiple dowel pins parallel to each other and at predetermined positions on the impression with simple operation, and to directly attach these dowel pins to the tooth profile model. An object of the present invention is to provide a dowel pin planting machine capable of planting dowel pins.

Next, one embodiment of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the dowel pin planting machine 10 according to this invention includes a base 12,
It includes a support stand 14, an arm part 16, a holding plate 18 having a magnet, and a holder 20. The pedestal 12 is formed from a wire mesh so as to fix the impression 22 in which tooth shapes are formed. A handle 24 projects horizontally from the bottom of the pedestal 12. The support stand 14 includes a U-shaped main body 26.
A tightening handle 30 is threaded onto the upper wall 28 and extends toward the lower wall for clamping the handle 24 between its lower end and the lower wall. Furthermore, the support stand 14 includes a cylindrical member 32 whose lower end side is fixed to the upper wall 28 and which has a circular elongated hole in its upper end surface.
This circular elongated hole extends halfway through the columnar member 32,
Further, a slit 34 is formed along the circular elongated hole in the peripheral wall of the columnar member 32 so as to communicate with the circular elongated hole. The arm portion 16 is a cylindrical member 3
The rod-shaped member 36 is inserted into the circular elongated hole of No. 2, and a protrusion 38 that can be inserted into the slit 34 is formed on the circumferential surface of the rod-shaped member 36. Thus, the rod-shaped member 36 is prevented from rotating due to the engagement between the protrusion 38 and the slit 34. At the upper end of this rod-shaped member 36, a first
An arm 42 is supported. first arm 4
2 has a rack 43 formed on its back surface, which meshes with a gear (not shown) rotatably provided within the vertical adjustment section. This gear is connected by a shaft to a vertical movement dial 44 rotatably mounted on the side wall of the vertical adjustment section 40, and is rotated by rotation of this dial. Further, the vertical adjustment section 40 includes an adjustment mechanism 46 that adjusts as necessary so that the first arm 42 does not fall due to its own weight. This adjustment mechanism 46 is provided above and below the gear, respectively, and the first
It consists of two pairs of clamps that clamp the arm 42 from both sides, and an adjustment knob that adjusts the clamping force of the clamps from the outside. A cylindrical first member 48 is fixed to the upper end of the first arm 42 at one end thereof at a substantially right angle. A first sphere 50 is rotatably inserted into the other end of the first member 48 . A second arm 52 is fixed to the first sphere 50 via a first connecting rod 51. Therefore, the first member 48 and the second arm 52 are connected in a spherical pair. The first member is provided with a first adjustment screw 54 that fixes the second arm 52 in a predetermined position by tightening the first sphere 50. Second
One end of a second member 56 is fixed to the other end of the arm at a predetermined angle therewith. A second sphere 58 is rotatably inserted into the other end of the second member 56 . The holding plate 18 is fixed to the second sphere via a second connecting rod 60. Therefore, the second member 56 and the retaining plate 18 are connected in a spherical pair. A holding plate 5 is attached to one side of the second member 56 by tightening the second sphere 50.
8 is provided with a second adjustment screw 62 for adjusting it to a predetermined position. The holding plate 18 is made of transparent synthetic resin and has a horseshoe shape, and has a flat lower surface facing the impression 22 with a thin plate-like magnet 66 over the entire surface. The holder 20 is made of an elastic member such as synthetic resin or rubber. As shown in FIG. 3, the holder 20 has a large number of rhombus-shaped holes 68 formed in a line at equal intervals and closely spaced from each other on one end surface thereof. A suction plate 70 is attached to the other end surface of the holder 20.
The holder 20 is supported by an L-shaped support plate 72 made of hard synthetic resin, with the other end surface and one side surface being adhered. A suction plate 7 made of a ferromagnetic material such as iron is provided on the outer surface facing the other end surface of the holder 20.
0 is pasted. The diamond-shaped hole 68 is
The dowel pin 74 inserted therein and the dowel ring 75 held between the holding pins 73 have a dimension such that the dowel ring 75 is held by elastic force.

Next, the operation of the dowel pin planting machine according to this invention will be explained.

The pedestal 12 on which the tooth-shaped impression is fixed is
The handle 24 is inserted into the support base 14 and fixed to the support base 20 by turning the tightening handle 30. Next, a holding pin 73 (hereinafter described as a dowel pin 74) holding a dowel pin 74 or a dowel ring 75 is inserted into the diamond-shaped hole 68 of the holder 20. At this time, the dowel pins 74 are attached perpendicularly to the bottom surface of the holder on which the suction plate 70 is provided and parallel to each other. Next, the vertical adjustment handle 44 is operated to position the holding plate 18 with a predetermined distance from the impression 22. and the first
and the second adjusting screw is operated to fix the retaining plate 18 in a position that substantially matches and is generally parallel to the tooth alignment formed on the impression 22. And holding plate 1
The holder 2 is moved by the action of the magnet so that the dowel pin 74 faces the direction of the impression at the desired position of 8.
Attach 0. Next, the vertical adjustment handle 44 is operated to lower the holding plate 18 to such an extent that the tip of the dowel pin 74 does not touch the impression 22. Then, the operator positions the dowel pin by sliding the holder 20 onto the magnetic surface with a finger or the like and positioning the dowel pin near the center of the tooth profile formed on the impression. Next, the arm part 16 is removed from the support base 14 by pulling out the rod-like member 36 supporting the arm part 16 from the cylindrical member 32. Next, primary plaster is poured into the impression. After the primary gypsum has uniformly flowed into the impression, the rod-shaped member 36 is inserted into the cylindrical member, and the arm portion 16 is mounted on the support base. This allows dowel pin 74
can be set accurately to the previously determined position.

Next, after the primary gypsum has solidified, the rod member 36 is pulled out from the cylindrical member 32 and the support base 1
Remove the arm member 16 from 4. At this time, since the holder 20 has been removed from the holding plate 18 together with the dowel pin, the holder is removed from the dowel pin.

Next, as shown in FIG. 4, the surface 7 of the primary plaster
After applying a release agent to 6, a truncated conical columnar member 78 is attached to the tip of a dowel pin 74 protruding from the primary plaster.

As shown in FIGS. 5 and 6, this columnar member 78 is made of an elastic material (such as rubber) and can be attached to and removed from a circular hole 82 of a substrate 80 that is also made of an elastic material. Possibly installed. The columnar member 78 is provided at one end with a protrusion 84 that fits into a hole 82 in the substrate, and at the other end is provided with a narrowed detail 88. Detail 88 forms a step 86 in columnar member 78 . A pore 90 is formed near this step 86 to such an extent that it does not penetrate through the columnar member. Furthermore, a notch 92 is formed from this pore 88 in the longitudinal direction of the columnar member, dividing the detail 88 into two. Further, a metal annular ring 94 that is fitted into the detail 88 is removably provided so that the two-part detail 88 is not separated when the dowel pin is attached to the small hole 90.

Next, as shown in FIG. 6, FIG. 7, FIG. 8, and FIG. The secondary plaster 96 is injected up to the point (indicated by the two-dot chain line in Fig. 7). After the secondary plaster 96 has solidified, when the columnar member 78 is pulled out from the secondary plaster 96, the dowel pin 74 passes through the notch provided in the columnar member 78 and leaves the annular ring 94 inside the secondary plaster. A lateral hole 98 is formed in 96. Next, cuts 100 are made with a cutter or the like on both sides of the desired tooth profile formed in the primary plaster 77 to separate it from the adjacent tooth profile. When it is desired to take out this toothed portion 102, the dowel pin 7 protruding into the side hole 98 is removed.
The dowel pin 74 is easily removed by pushing the end of the dowel pin 74 in the direction in which it is planted, thereby obtaining the desired toothed portion 102 as shown in FIG. On the other hand, for the tooth profile portions that need to be fixed, dowel rings 75 are planted on the tooth profile model in the same manner as the dowel pins 74, and fixed so that the primary and secondary plasters do not move.

According to the embodiment described above, the arm portion can be easily operated and the dowel pin can be reliably fixed in a predetermined position. Accurate alignment of the dowel pins can be easily achieved by sliding the holders onto the flat surface of the magnet, and the holders can be planted parallel to each other. Further, since the holes in the holder for attaching the dowel pins are rhombic in shape, the distance between adjacent holes can be narrowed. Further, since the columnar member has a notch, it can be easily pulled out from the secondary plaster, and furthermore, the columnar member can be used again.

This invention is not limited to the one embodiment described above, and can be modified in various ways without departing from the spirit of this invention.

For example, in the embodiment described above, the holding plate was equipped with a magnet, and the holder was equipped with an adsorption plate made of an iron plate.
The present invention is not limited to this, and the same effect can be obtained even if the suction plate is made of ferromagnetic material, such as nickel or cobalt. Moreover, the same effect can be obtained even if the holder is equipped with a magnet and the holding plate is equipped with these adsorption plates.

Further, in the above embodiment, the shape of the holding plate is a horseshoe shape, but the shape is not limited to this, and the same effect can be obtained even if the holding plate is polygonal or circular. In this case, by attaching a magnet to the entire holding plate, the holder can be moved over a wide range, so that impressions of various shapes can be accommodated.

In addition, the magnets provided on the retaining plate are not limited to being provided over the entire retaining plate, but for example, if they are arranged in a line or grid pattern with predetermined intervals, the position of the dowel pin can be detected through the transparent retaining plate. Positioning can be done while checking.

Then, the holder has three parts as in the above-mentioned embodiment.
For example, if the number of dowel pins to be attached is reduced and a small holder is provided and a large number of these holders are combined, a holder of the same shape can be used for complex tooth alignment.

As described in detail above, according to this invention, a plurality of dowel pins can be set in parallel with each other and in a predetermined position with a simple operation, and the dowel pins can be planted in a tooth profile model. machine can be provided.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a dowel pin planting machine according to this invention, FIG. 2 is a side view of a dowel pin planting machine according to this invention, and FIG. 3 is a perspective view of a holder.
Figure 4 is a perspective view of the pedestal with the columnar member attached to the dowel pin, Figure 5 is a perspective view of the columnar member, Figure 6 is a plan view of the pedestal with the columnar member attached, and Figure 7 is the figure 6. 8 is a perspective view of the dental plaster model, FIG. 9 is a sectional view of FIG. 8 taken along the line -, and FIG.
The figure is a perspective view showing a tooth-shaped portion. 10... Planting machine for dowel pins, etc., 18... Holding plate, 20... Holder, 66... Magnet, 7
0... Iron plate (adsorption plate).

Claims (1)

[Scope of utility model registration request] This is a planting machine that plants dowel pins in a tooth profile model formed based on an impression, and the holding plate is set at a predetermined position and has a flat bottom surface, and a plurality of dowel pins to be planted in the tooth profile model can be freely attached and detached. 1. A dowel pin planting machine comprising: a holder for holding the dowel pin; and a magnetic means for slidably attaching the holder along the surface of the holding plate using magnetic force.