JP2002360610A - Dental gypsum grinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent scattering of dust to the outside of a work plate (the outside of an apparatus body). SOLUTION: This dental gypsum grinder is characterized in that a level difference part 11 having a working table 6 is formed in an upper end part of the apparatus body 1, a space part of at least this level difference part 11 is formed as the enclosing volume, a transparent hood 12 having a grinding window 15 is installed on a hood front wall 13, a disk-like grinding wheel for rotating by driving force of a driving motor 20 is positioned in this transparent hood in a vertical state, and a wind speed control plate 30 having a plurality of air flowing holes 31 is fixed to the working table 6 so as to cross an almost central part of the grinding wheel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental gypsum grinder, and more particularly to a "dry" dental gypsum grinder that does not use water.

[0002]

2. Description of the Related Art An example of a dry dental gypsum grinder is described in Japanese Patent Application Laid-Open No. 10-151147. The embodiment described in this publication discloses that a storage chamber for a disk-shaped grindstone rotated by a motor is formed so as to protrude from a front wall of a box body, and an article to be ground is placed in front of a front grinding window of the storage chamber. A drawer-type work table for projecting, and a dust suction gap is provided between the work table and the front wall of the storage chamber, and a space for dust collection is formed below the gap and below the storage chamber; A suction passage that passes through the lower part of the front wall of the box and communicates the dust collection space and a dust collection device installed in the horizontal box, and dust generated at the time of grinding work is the dust suction gap; Pass through the lower space for collecting dust and collect the dust in a dust bag attached to the partition wall. "

[0003] This dental gypsum grinder has the advantage that the suction force can be increased by utilizing the flow of wind generated by the rotation of the disk-shaped grindstone, but it has the following problems, for example. Was. Since the workbench having the work table is provided so as to project from the front wall of the box in which the dust collector is arranged in the horizontal direction, the gypsum grinder becomes horizontally long as a whole. Therefore, an installation space is required. Although a dust suction gap is provided between the work table and the front wall of the storage chamber, this gap is a relatively large horizontally long opening. In addition, dust is soared out of the work table and scattered because no measures are taken to sufficiently control the wind. Since the member for storing dust is merely a storage bag, the function of the filter cannot be expected so much. Since the grindstone that is in close contact with the back surface of the grindstone chamber is disposed in the grindstone chamber so that a part of its surface appears from the grinding window, the peripheral wall and back surface of the grindstone cannot be used.
That is, the wall surface of the grindstone cannot be effectively used.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described problems of the conventional embodiments, and a first object is to
Dust is not scattered outside the work board (outside the body). A second object is to make the gypsum grinding machine compact in a vertical type. A third purpose is that the combination is easy. A fourth object is to sufficiently improve the dust collecting ability of the filter. A fifth object is to effectively utilize the wall surface of the grindstone.

[0005]

A dental gypsum grinder according to the present invention has a stepped portion 11 having a work table 6 at the upper end of a vertical vessel 1, and at least a space portion of the stepped portion 11 is formed. A transparent hood 12 having an enclosed volume and having a grinding window 15 on a hood front wall 13 is mounted, and a disk-shaped grindstone that is rotated by a driving force of a drive motor 20 is vertically positioned in the transparent hood. The wind speed control plate 30 having the air flow holes 31 is fixed to the worktable 6 so as to intersect with a substantially central portion of the whetstone.

Further, in the dental gypsum grinder of the present invention, a stepped portion 11 having a worktable 6 is formed at the upper end of the vertical vessel 1, and at least a space portion of the stepped portion 11 is surrounded by a volume. The transparent hood 12 having the grinding window 15 is attached to the hood front wall 13, and the disk-shaped grindstone that is rotated by the driving force of the drive motor 20 is vertically positioned in the transparent hood. Wind speed control plate 30 having
Is fixed to the work table 6 so as to intersect the substantially central portion of the grinding stone, and further, a dust guiding partition plate 35 is disposed below the grinding stone 23 in an inclined manner, thereby forming an upper falling space 60.
And a filter member 40 is detachably provided between the dust collecting box 45 mounted on the bottom wall 2 of the container 1 and the partition wall 35.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS.
An embodiment will be described. X is a dry dental gypsum grinder. The body 1 of the gypsum grinder X is formed vertically as a whole. Referring to FIG. 1, the front of the upper end of the vertically elongated container 1 is formed in a stepped shape. The vertically long container 1 has a plurality of short supports 3 on the bottom wall 2 with reference to the front view (FIG. 2). These supports 3 may be casters. Here, each outer wall of the container 1 will be briefly described. Reference numerals 4, 4 denote left and right side walls, 5 denotes an upper wall, 6 denotes a horizontal working wall which is located slightly below the upper wall and forms a stepped portion, 7 denotes a crossing between the working wall 6 and the upper wall 5 and a stepped portion. Vertical wall forming part, 8 is a front wall, 9 is a door, and 10
Is the back wall.

Next, the transparent hood 12 provided on the step 11 of the body 1 will be described. The transparent hood 12 surrounds at least the space portion of the step portion 11 and has a volume. That is, the transparent hood 12 of the present embodiment is attached to the step portion 11 while ensuring a required volume ratio so that dust is not scattered and a peripheral wall of a grindstone described later can be used. The transparent hood 12 looks like a case in appearance, but its bottom surface and back surface are each open. Further, a grinding window 15 of a required size is formed in the hood front wall 13 from the central portion to the vicinity of the hood left side wall 14. The hood upper wall 16 is located on substantially the same plane as the upper wall 5 of the body 1.

Next, the internal structure of the housing 1 and each member disposed therein will be described in order from the top. Reference numeral 20 denotes a drive motor provided laterally on the upper surface of the first support plate 17 located at the top in the housing 1, and an output shaft 21 of the drive motor 20 protruding from the housing 1 as shown in FIG. Project from a hole 22 formed in the vertical wall 7.

Reference numeral 23 denotes a disk-shaped grinding wheel. Whetstone 23
The work wall 6 is set at a substantially central portion in the front-rear direction such that a substantially upper half projects from the wind speed control plate 30.
The grindstone 23 comprises a grindstone base plate 24 mainly composed of aluminum, and a grinding layer 25 of diamond powder fixed so as to cover the surface and the peripheral wall surface of the grindstone base plate 24. As shown in FIG. 6, the grinding wheel 23 is a guide cylinder 2 fixed to an output shaft 21 of a drive motor 20 in this embodiment.
6 and a fixing means such as a center bolt 27 having a male screw that is screwed with a female screw of the guide cylinder 26. When the disc-shaped grindstone 23 is attached to the output shaft 21, the upper half thereof has a central portion (including a portion closer to the central portion) in the transparent hood 12 as shown in FIG. 5.
Located in.

Reference numeral 30 denotes a wind speed control plate fixed to the upper surface of the work wall 6 so as to close the opening 28 formed in the work wall 6 of the container 1, and having a plurality of air flow holes 31. This wind speed control plate 30 is desirably located on the horizontal center line of the grindstone 23. Although the tip of the grinding stone 23 slightly protrudes from the hood front wall 13, substantially the entirety thereof is located in the transparent hood 12. Therefore, the wind speed control plate 30 according to the present embodiment has a function of controlling the passage position of the wind that is going to pass through the air flow holes 31 and a function as a work table when cutting an article to be ground (a plaster model for dental treatment). Has functions.

The air flow holes 31 are divided into three types in this embodiment. First is the wind speed control plate 3
There are a plurality of small slots 31a formed in an aligned state around the upper left 1/4 part on the zero. The second is the largest rectangular long hole 31b farthest from the peripheral wall of the grindstone 23 and located in the radial direction intersecting with the center bolt 27.
It is. The third is a plurality of circular small holes 31c located near the inner wall surface of the hood front wall 13.

In order to allow the left half 23a of the grindstone 23 to enter the wind speed control plate 30 with a margin, a required horizontal notch 32 extends in the longitudinal direction (radial direction of the grindstone) from the center of the right end face. Are formed. Also, in the opening 28 of the working wall described above, a horizontal notch 29 communicating with the opening 28 so that the grindstone 23 can be set.
Etc. are formed.

Reference numeral 35 denotes a partition plate disposed below the grindstone 23 for guiding dust. Although the partition plate 35 may be disposed in a horizontal state, in this embodiment, as shown in FIGS. 1 and 5, the partition plate 35 is disposed so as to be inclined with respect to the lower half portion of the grindstone 23. Although the means for attaching the partition plate 35 is not particularly shown, for example, a hinge or a male / female engagement piece fixed to the upper end portion of the partition plate 35 and the central portion of the vertical wall 7 of the body 1 respectively. Is fixed at a predetermined position via the. The partition plate 35 has a plurality of dust passage holes 36 for guiding the dust to a filter member 40 arranged below.
Are formed in an aligned state.

Reference numeral 37 denotes a partition wall provided so as to face the first support plate 17. The cross section of the tip of the partition 37 is
As shown in FIG. 5, a downward projecting wall 38 is formed. Reference numeral 40 denotes a filter member disposed below the partition plate 35.
In this embodiment, the filter member 40 includes a first vertical plate filter 41 facing the vertical partition wall 46 and the first vertical plate filter 41.
Attached to one side of the vertical plate filter 41, and
Upper and lower end faces are formed of a second vertical plate (plane) filter 42 formed in a wavy shape.

Reference numeral 43 denotes a case frame-shaped holding member for holding the filter member 40. This holding member 43 is
A plurality of end-shaped L-shaped supporting pieces fixed to the inner wall surface of the left and right side walls 43 may be used, but in the present embodiment, as shown in FIG.
a, 43a, and rectangular frame pieces 43 having dust openings 44, 44 connected to upper and lower ends of these side walls, respectively.
b, 43b.

The filter member 40 is detachably held by a holding member 43 located slightly above the dust box 45 mounted on the bottom wall 2 of the container 1. By the way, the filter member 40 should desirably increase the overall area of the filter so that the filter function can be sufficiently exhibited. Therefore, in the present embodiment, the second vertical plate filter 42 is formed in a folding screen shape, and has a total of 12 mesh-like surface portions.

Reference numeral 46 denotes a vertical partition wall provided behind the filter member 40. The vertical partition wall 46 is provided between the partition 37 and the dust collecting box 45 so as to be slightly offset backward from the vertical wall 7 of the container 1. Thus, the upper end of the vertical partition wall 46 is appropriately fixed to the partition wall 37, while the lower end thereof is provided with an upward projecting wall 47. A cylindrical suction port 48 is formed at the lower end of the vertical partition wall 46, and a suction pipe 49 is formed in the suction port 48.
Are connected.

Reference numeral 50 denotes a second support plate connected to the vertical partition wall 46 and the rear wall 10 so as to face the partition wall 37. On the upper surface of the second support plate 50, a dust collection and suction device 51 is provided. Although the specific configuration of the dust collection and suction device 51 is not shown here, the dust collection and suction device 51 is, for example, a dust guide box having an intake port 52 and an exhaust port 53 to which the rear end of the suction pipe 49 is connected. And a blower 55 connected to the dust guide box 54.

Since the space in which the dust collection and suction device 51 is placed is an air discharge room, in the present embodiment, a mesh-shaped air outlet 57 formed in the rear wall 10 is taken into consideration in consideration of the environment. Two filter members 58 are detachably mounted.

In the above-described configuration, an article to be ground (not shown) is pressed into the grinding layer 25 of the grinding wheel 23 rotating counterclockwise, for example, while being put into the transparent hood 12 through the grinding window 15. In this case, the grinding can be performed while placing the article to be ground on the upper surface of the wind speed control plate 30. Further, since the transparent hood 12 of the present embodiment is transparent, it is possible to perform grinding while visually observing the state of grinding from the peripheral wall direction or the back surface of the grindstone 12.

The dust generated by the grinding passes through the air flow holes 31 of the wind speed control plate 30 and reaches the upper falling space 60. At this time, the fine dust passes through the small elongated hole 31a right next to the grindstone 23. Dust not passing through the small hole 31a passes through the circular small hole 31c. Furthermore, large pieces of the article to be ground are dropped so that they can be manually removed from the rectangular elongated hole 31b.

The dust that has reached the upper falling space 60 passes through the dust passage hole 36 of the partition plate 35. On the other hand, fragments of the article to be ground enter the dust collection box 45 through the rectangular front falling space 61 of the filter member 40.

Next, the dust that has passed through the dust passage hole 36 of the partition plate 35 enters the filter member 40, and the fine dust adheres to the first and second vertical plate filters 41 and 42 and is removed by this. At this time, the coarse dust falls into the dust collection box 45.

Next, the air that has passed through the filter member 40 passes through the suction pipe 49 or the dust guide box 54 by the suction force of the dust suction unit 51 and exits to the air discharge chamber 62.
Then, the air that has flowed out to the air discharge chamber 62 passes through the second filter member 57, becomes purified air, and goes out of the housing 1.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The air flow holes 31 formed in the wind speed control plate 30 of the first embodiment are provided by combining a plurality of small elongated holes or circular small holes vertically and horizontally.
The cross-sectional area is set so as to be s or more. Further, a partition plate 35 having a plurality of dust passage holes 36 is provided below the grindstone 23 in an inclined manner. However, the partition plate 35 is not necessarily required to be inclined.
It is not necessary to provide. In short, any partition plate for guiding dust may be used. Next, a second embodiment will be described in this section. In the description of the second embodiment, parts that are the same as or similar to the first embodiment (having the same functions) are given the same or similar reference numerals, and duplicate explanations are omitted.

The main differences between the second embodiment shown in FIGS. 8 to 10 and the first embodiment are as follows.
A long plate-shaped blind plate 70 is provided at the boundary between the falling space 60 and the rectangular front falling space 61, and the blind plate 70 is opened and closed via operation means (operation handle) 71 located outside the body 1. That it can be operated freely. "

Therefore, the second embodiment includes the main part of the first embodiment as it is, and has other components (the blind plate 70,
Although the operating means is limited or taken into account, when the blind plate 70 is closed, the generated dust substantially passes through the partition plate 35, so that the function of the filter member 40 can be fully utilized. There is an advantage.

(B) Next, a second suction port 48 is formed on the left side wall 4 of the container 1 so that dust can be sucked from an appropriate portion of the front drop space 61, for example, an intermediate portion of the front drop space 61. The second suction port 48 is provided as shown in FIG.
The second suction pipe 72 is connected to the second dust collection suction device 73. "

This configuration requirement is a specific requirement of the invention focusing on the "object of the invention of using the gypsum grinder X as a dust collector". This component also includes the main part of the first embodiment as it is, and other components (the second suction pipe 72,
The second dust collecting / suctioning device 73) is limited or added. With such a configuration, the gypsum grinder X can be used as a dust collector for improving the environmental conditions of the room. In the second embodiment, it is necessary to form a dust guide hole in the partition plate 36 in relation to the blind plate 70.

[0031]

As apparent from the above description, the present invention has the following effects. (1) Dust does not scatter outside the working plate (outside the body). (2) The gypsum grinder can be downsized into a vertical type. (3) Combination is easy. (4) The dust collecting ability of the filter can be sufficiently improved. (5) The wall surface of the grindstone can be effectively used. In particular, in the embodiment described in claim 7, the form of the grindstone is variously changed, and not only the front surface and the peripheral wall surface but also the back surface of the grindstone can be used.

[Brief description of the drawings]

1 to 7 are explanatory views showing a first embodiment of the present invention. 8 to 10 are explanatory views showing a second embodiment of the present invention.

FIG. 1 is a perspective view of a first embodiment.

FIG. 2 is an explanatory view from the front.

FIG. 3 is an explanatory view from a plane (partially cut away).

FIG. 4 is an explanatory view from the side.

FIG. 5 is a schematic vertical sectional view.

FIG. 6 is a schematic explanatory view (partial end surface) of a main part viewed from a plane.

FIG. 7 is an explanatory view showing an example of a holding member and a filter member.

FIG. 8 is a perspective view of a second embodiment.

FIG. 9 is a front view.

FIG. 10 is an explanatory view from the side (an essential part is shown in an enlarged cross section).

[Explanation of symbols]

X: gypsum grinder, 1 ... body, 2 ... bottom wall, 3 ... abutment, 4 ...
Side walls, 5 ... Top wall, 6 ... Work wall, 8 ... Front wall, 9 ... Opening / closing door,
10: rear wall, 11: step, 12: transparent hood, 13 ...
Hood front wall, 14: Hood left side wall, 15: Grinding window, 1
6 hood upper wall, 17 first support plate, 20 drive motor, 21 output shaft, 23 whetstone, 24 whetstone base plate,
25: grinding layer, 26: guide cylinder, 27: center bolt,
28 ... opening, 30 ... wind speed control plate, 31 ... air circulation hole,
29, 32 ... horizontal notch, 35 ... partition plate, 36 ... dust passage hole, 37 ... partition wall, 38 ... downward protruding wall, 40 ... filter member, 41 ... first vertical plate filter, 42 ... second vertical plate ( Surface filter) 43 holding member, 45 dust collecting box, 46 vertical partition wall, 47 upward projecting wall, 49 suction pipe, 51 dust collecting and suction device, 55 blower, 60 upper falling space , 61: forward drop space, 62: air discharge chamber,
70: blind plate, 71: operating means, 72: second dust collection and suction device.

Claims (7)

[Claims] 1. A step portion 11 having a work table 6 is formed at an upper end portion of a vessel 1, and at least a space portion of the step portion 11 has an enclosed volume, and a grinding window 15 is formed in a hood front wall 13.
A transparent hood 12 having a plurality of air circulating holes 31 is disposed in the transparent hood, and a disk-shaped grindstone rotating by the driving force of the drive motor 20 is vertically positioned in the transparent hood. A dental gypsum grinding machine fixed to the work table 6 so as to intersect a substantially central portion. 2. A dust guiding partition plate 35 is disposed below the grindstone 23, and a filter member 4 for removing fine dust is disposed below the partition plate 35.
A dental gypsum grinder, wherein 0 is provided. 3. The filter member 40 according to claim 2,
Is a dental gypsum grinder provided in front of a vertical partition wall 46 having a suction port 48 and having a corrugated plate-like filter at both end faces. 4. A stepped portion 11 having a working table 6 is formed at the upper end of the vertical vessel 1, and at least a space portion of the stepped portion 11 has an enclosed volume, and a grinding window is formed on a front wall 13 of the hood. A transparent hood 12 having a plurality of air flow holes 31 is mounted in the transparent hood, and a disk-shaped grindstone that is rotated by a driving force of a driving motor 20 is positioned vertically in the transparent hood. Is fixed to the worktable 6 so as to intersect with the substantially central portion of the work piece, and further, a dust guide partition plate 35 is arranged below the grindstone 23 in an inclined manner to form an upper drop space 60, and A dental gypsum grinding machine characterized in that a filter member 40 is detachably provided between a dust collecting box 45 mounted on a bottom wall 2 of a container 1 and the partition wall 35. 5. The filter member 40 according to claim 4, wherein
Forward drop space 61 communicating with upper fall space 60 in front of
Gypsum grinding machine for dental use, characterized in that: 6. The dental gypsum grinder according to claim 4, wherein a blind plate 70 that is opened and closed by an operation means is provided in a falling space where the dust falls. 7. The grinding wheel 35 according to claim 4, wherein the grinding wheel 35 is set at a substantially central portion of the working wall 6 in the front-rear direction such that a substantially upper half projects from the wind speed control plate 30. Dental gypsum grinding machine.