JP3534821B2 - Dental alginate impression material mixing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention completely and automatically kneads a powder material of a dental alginate impression material used for obtaining a negative shape such as a tooth shape in dental treatment with a liquid such as water. The present invention relates to a mechanical dental alginate impression material kneading device.

[0002]

2. Description of the Related Art Alginate impression materials, rubber impression materials, agar impression materials and the like are known as dental impression materials used for obtaining negative shapes such as tooth shapes in dental treatment. Among these, dental alginate impression materials are inferior to rubber impression materials and agar impression materials in terms of dimensional accuracy, but they are inexpensive, do not require a special storage container, and are stored separately as two components. It is evaluated in terms of things that you do not have to do,
It is still used in many dental clinics to date.

This dental alginate impression material utilizes the fact that when water-soluble alginate and gypsum are reacted, insoluble calcium alginate is produced and hardened. Various kinds of dental alginate impression materials are provided by companies in Japan and overseas to the dental clinic, and the main operation method is a powder of a mixture of alginate and gypsum and a liquid such as water in a predetermined amount. (Different for each company) Weigh the two, put them in a rubber kneading cup, and knead them using a special spatula called a spatula, but the kneading work is not limited as long as the curing does not proceed so much. Since it has to be performed within a certain period of time and with no air bubbles inside the impression material, the work requires relatively skill.

In view of the above points, in order to reduce the work involved in the kneading, for example, in Japanese Patent Laid-Open No. 63-310629 and Japanese Utility Model Publication No. 5-32110, the kneading cup is kneaded while rotating and revolving the kneading cup. An automatic kneading device for performing the above has been proposed, and various devices applying these are provided as products by various companies in actual clinical situations.

The operating procedure in such a commercially available apparatus is as follows. First, the powder of the dental alginate impression material which has been weighed in advance is put in a kneading cup, and thereafter, a liquid such as water which has been weighed in advance is put in the kneading cup. Manually shake the kneading cup containing the powder and liquid such as water several times so that the liquid such as powder or water does not overflow, or gently stir with a spatula and then use the specified kneading device. This is done according to the procedure of setting the kneading cup at the position and turning on the operation start switch of the device. The action of shaking or kneading the kneading cup a few times so that liquid such as powder or water does not overflow does not easily fit into liquid such as water due to its nature. The work is complicated because it is an essential work that must be performed visually while making preparations so that the powder and the liquid such as water can be mixed so that the device can surely mix with the liquid. There was one drawback.

The kneading principle of a kneading device capable of kneading these currently commercially available dental alginate impression materials is as follows.
When the kneading cup rotates and revolves, the powder and the liquid such as water gradually mix to form a sol-like substance, and the viscosity of this sol-like substance is used to knead it by the friction resistance with the inner wall of the kneading cup. Is to go further. However, although such a conventional kneading device shows relatively good performance in terms of removing air bubbles, a portion where the penetration of liquid such as water is delayed in the powder of the dental alginate impression material is delayed. A "crushed" unmixed part (called "damage") remains on the surface, making it difficult for liquids such as water to penetrate into the interior due to surface tension. Other than physical means (crushing with a spatula, etc.) There was a drawback that it could not be removed. This is because the dental alginate impression materials provided by each company are given various properties by special blending, and those that are easy to adjust from those that are easy to adjust to liquids such as water, or those that easily disperse powder are difficult to scatter. It is also due to the existence of various things.

[0007]

DISCLOSURE OF THE INVENTION The present invention is a drawback of the apparatus for kneading the above-mentioned conventional alginate impression materials, that is, the kneading work has not been completely automated and requires no manual labor. The dental alginate impression material kneading device eliminates the disadvantage that the kneaded product causes lumps because it is not applicable to all of the dental alginate impression material currently on the market. The challenge is to provide.

[0008]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that a mixture of a measured powder of dental alginate impression material and a pre-measured liquid such as water is added. In the initial stage of kneading, the Japanese cup is rotated and revolved relatively gently so that the powder of the alginate impression material for dental use and the liquid such as water become familiar, and by a kneading auxiliary member provided so as to protrude into the kneading cup. Or, the lumps disappear from the kneaded product due to the unevenness generated on the inner surface of the kneading cup by the action of the mounting aid that deforms the kneading cup, and then it mixes inside the kneaded product if it is rotated and revolved at high speed The present inventors have completed the present invention by investigating that the generated bubbles can be removed.

That is, the present invention is provided with a mechanism for revolving the kneading cup containing the weighed powder of dental alginate impression material and the previously weighed liquid such as water while revolving, and the rotational force thereof is driven. In a dental alginate impression material kneading device obtained by a motor for driving, the driving motor is set to perform at least two stages of constant speed rotation, an initial low speed rotation range and a subsequent high speed rotation range. The kneading cup is provided with a kneading cup upper lid having a kneading auxiliary member protruding into the kneading cup attached to the lower surface of the upper lid for closing the upper opening thereof, and / or A dental appliance characterized by comprising a mounting auxiliary member for deforming a kneading cup mounted on a kneading cup receiver for holding the kneading cup to form irregularities on the inner surface thereof. It relates to Rujineto impression material kneading apparatus.

[0010]

EXAMPLES Examples of the dental alginate impression material kneading apparatus according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional explanatory view of a dental alginate impression material kneading device according to the present invention, FIG. 2 is an explanatory view showing another embodiment of an upper lid to which a kneading auxiliary member is attached, and FIG. 3 is a kneading auxiliary member. Is an explanatory view showing still another embodiment of the upper lid to which is attached, FIG. 4 is a longitudinal section of another aspect of the upper lid having a structure to which a kneading auxiliary member is attached, FIG. 5 is a bottom view of FIG. 4, and FIG. FIG. 7 is an explanatory view showing a change in the number of revolutions with the passage of time, FIG. 7 is an explanatory view of a state inside the kneading cup for explaining a state in which the lumps are eliminated from the kneaded product, and FIG. 8 is mixed in the kneaded product. FIG. 9 is a perspective view showing a kneading cup receiver and a kneading cup provided with a mounting assisting member, and FIG. 10 is shown in FIG. 9. It is isometric view explanatory drawing which shows the state which attached the kneading cup to the kneading cup receiver.

In the drawings, reference numeral 1 denotes a kneading cup upper lid (hereinafter sometimes simply referred to as an upper lid) for closing the upper opening of the kneading cup 3, which is made of rubber or soft plastic. Various materials such as hard plastic and metal can be used. Further, the kneading cup 3 may be a cylindrical one as shown in the figure, or a so-called bowl-shaped rubber cup made of rubber used for kneading impression materials in a dental clinic may be used. May be provided with kneading cup locking projections 1b having various diameters on the lower surface so as to correspond to the opening diameters of various kneading cups 3 used as shown in FIGS. The size of the upper lid 1 is sufficient for use if the diameter is about 60 to 100 mm.

Reference numeral 2 denotes a kneading auxiliary member attached to the lower surface of the upper lid 1 so as to project into the kneading cup 3, and may be integrally formed with the upper lid 1 from the beginning as shown in FIG. It is also possible to fix the one molded separately from 1 to the lower surface of the upper lid 1 so as to be integrated. The kneading auxiliary member 2 may have various shapes such as a round bar shape, a plate shape, and a kamaboko shape, and may have a through hole 2c as shown in FIG. 2 or a split groove as shown in FIG. 2e may be provided to further enhance the stirring effect. The length of the kneading auxiliary member 2 depends on the depth of the kneading cup 3 used, but the depth of the kneading cup 3 is about 100 mm at the maximum, and therefore, it is preferably about 40 to 80 mm. For example, kneading cup 3
If the depth is around 70mm, a 50mm length will fully fulfill its function. Further, the width of the kneading auxiliary member 2 depends on the diameter of the kneading cup 3, but if the diameter is 80 mm, for example, 20
Since there is a width of mm to fulfill its function, it is preferably about 10 to 30 mm. The kneading auxiliary member 2 may have a thickness of 1 to 2 mm when the material is a hard material such as a stainless plate, but the upper lid 1 and the kneading auxiliary member 2 are made of a plastic material. In the case of integral molding, the upper part should be 5 mm and the lower part should be 1 to 2 mm.

Reference numeral 4 denotes a kneading cup receiver for mounting the kneading cup 3 therein or storing the kneading cup 3 therein. When the kneading cup 3 is accommodated in the kneading cup receiver 4, the outer dimensions of the kneading cup 3 and the kneading cup receiver 4 are stored. It suffices if they are fitted together with the inner diameter dimension of No. 4. Further, a pressing tool 5 is provided above the kneading cup receiver 4 to prevent the kneading cup 3 from popping out and the upper lid 1 from coming off during operation. In this pressing tool 5, the lower part of the kneading cup 3 is the kneading cup receiver 4
If the upper lid 1 is fixed to the upper lid 1 and can be fitted into the opening of the kneading cup 3 with an elastic material such as rubber, the upper lid 1 need not be provided.

Reference numeral 6 denotes a rotary shaft which is rotatably supported by a bearing 7a housed in a bearing housing box 7 fixed to the revolution board 11 and has a kneading cup receiver 4 fixed to its upper end. is there. With this configuration,
The rotary shaft 6 can rotate about the revolution plate 11.

Reference numeral 8 denotes a pulley fixed to the upper part of a revolution shaft 12 fixedly installed on a base 16. Reference numeral 10 denotes a lower portion of the kneading cup receiver 4 which is bent with an outer ring groove of the pulley 8 and a pulley-shaped belt guide 9 rotatably mounted on a supporting portion 9a standing upright from the revolving plate 11 as a bending point. The belt is mounted so as to fit into the belt groove 4a provided in the.

A belt pulley 13 is attached to the revolution shaft 12 via a bearing 13a, and its upper surface is fixed to the lower surface of the revolution plate 11. An outer ring groove of the belt pulley 13 and a motor pulley 14 fixed to a rotation shaft of a drive motor 14 mounted in the base 16.
A belt 15 is attached so as to fit in the outer ring groove of a. With such a configuration, the drive motor 14
When the rotational force is transmitted to the belt pulley 13 via the belt 15, the revolution plate 11 revolves around the revolution shaft 12.

Next, a description will be given of an embodiment in which the kneading cup receiver 4 shown in FIGS. 9 and 10 is provided with the mounting auxiliary member 20. In the kneading cup receiver 4, the mounting auxiliary member 20 is erected inside. A lid 18 is provided via a supporting member 19 so as to be located above the upper end surface of the kneading cup receiver 4 by a predetermined distance. In the case of such a kneading cup receiver 4, the kneading cup 3 is made of an elastic material, and when the kneading cup 3 is mounted in the kneading cup receiver 4, the kneading cup 3 is shown in FIG. As mounting aid 20
It is deformed according to the deployment position of and has a certain unevenness inside.

[0018]

The operation of the dental alginate impression material kneading apparatus according to the present invention will be described below. In the case of the upper lid 1 shown in FIG. 2, the kneading assisting member 2 is a rotating shaft 2a held by a rotating shaft support 2b provided on the lower surface of the upper lid 1.
Since it is rotatable about the axis in the radial direction from the center of the upper lid 1, it hangs down in the direction of the gravity line due to gravity at the time of stop and in the low speed rotation range, but in the high speed rotation range, the inner wall of the kneading cup 3 is caused by centrifugal force. It will be drawn to your side.

In the case of the upper lid 1 shown in FIG. 3, the kneading auxiliary member 2 has a thumbscrew at the upper portion penetrating through a slotted sliding groove 1a provided in the upper lid 1 in the radial direction from the center of the upper lid 1. The kneading cup 3 is configured to be fixed by 2d and is used.
The mounting position can be changed appropriately according to the diameter of the dental alginate impression material and the amount of dental alginate impression material to be kneaded. It is preferable that a sealing plate 2f is provided on the inner side facing the sliding groove 1a so that the liquid does not overflow. As shown in FIGS. 4 and 5, it is preferable that the kneading cup locking protrusion 1b is provided on the inner side of the upper lid 1 because the hermeticity and the position holding performance are further improved.

In order to knead a dental alginate impression material using the upper lid 1 to which such a kneading auxiliary member 2 is attached, first, powder of the dental alginate impression material is placed in a kneading cup 3. A predetermined amount of liquid such as water is poured into each, and the upper opening of the kneading cup 3 is closed by the upper lid 1, and then the kneading cup 3 with the upper lid 1 is attached to or inside the kneading cup receiver 4. In the case where a holding tool 5 is provided on the kneading cup receiver 4 for storing and preventing the kneading cup 3 from popping out or the upper lid 1 from coming off during operation, this holding tool 5 is used. Press the upper lid 1 down.

Next, when a switch (not shown) is turned on, the drive motor 14 mounted in the base 16 is driven by a command from a control circuit (not shown), and the initial state shown in FIG. As shown, at low speed range A, the speed is low,
Next, in the high speed rotation range B, the rotation shaft is rotated at at least two stages of constant speed rotation at high speed. The ratio of the rotation speed in the high speed rotation range B to the rotation speed in the low speed rotation range A is preferably about 3 to 6 times. The reason is that if it is less than 3 times, the air bubbles in the kneaded product may not be completely removed, and if it exceeds 6 times, the kneading of the kneaded product of the alginate impression material is too fast, which is not preferable.

Thus, when the drive motor 14 is driven,
Motor pulley fixed to the rotating shaft of the drive motor 14
Belt 15 fitted to fit in the outer ring groove of 14a
The belt pulley 13 attached to the revolution shaft 12 via the bearing 13a is rotated by the rotary shaft 12, and the revolution plate 11 to which the upper surface of the belt pulley 13 is fixed revolves around the revolution shaft 12. Further, when the revolution plate 11 revolves around the revolution shaft 12, the bearing storage box 7 fixed to the revolution plate 11 also revolves around the revolution shaft 12, so that it is accommodated in the bearing storage box 7. The kneading cup receiver 4 fixed to the upper end of the rotary shaft 6 rotatably supported by the bearing 7a also revolves around the revolution shaft 12. The belt groove 4a provided in the lower part of the revolving kneading cup receiver 4 and the outer ring groove of the pulley 8 fixed to the upper part of the revolution shaft 12 fixedly erected on the base 16 are: Since the belt 10 which is bent with the pulley-shaped belt guide 9 which is rotatably mounted on the supporting portion 9a which is erected from the revolving plate 11 as a bending point is fitted so that the belt 10 is The kneading cup receiver 4 rotates at the end of the revolution board 11.

The ratio between the rotation speed and the revolution speed is determined by each pulley 14
It can be adjusted by considering the sizes of a, 13, and 8, but for example, in the low speed rotation range A, the rotation speed is set to 100 to 150 rpm and the revolution speed is set to 400 to 500 rpm.
At 3 to 6 seconds and at high speed range B from 12 to
When the time is set to 20 seconds, a favorable kneading result can be obtained.

In this way, the kneading cup receiver 4 has the revolution shaft 12
When revolving around and rotating on the upper part of the rotating shaft 6,
The kneading cup 3 with the upper lid 1 attached to or stored in the kneading cup receiver 4 also revolves and rotates together with the kneading cup receiver 4, and powder and water of the dental alginate impression material in the kneading cup 3 The liquid is periodically contacted by a kneading auxiliary member 2 which is attached to the lower surface of the upper lid 1 so as to project into the kneading cup 3, but in the low rotation speed range A at the beginning of the kneading, the dental alginate impression material is used. As shown in FIG. 7, the kneaded product 17 composed of the powder and the liquid such as water is agitated by the kneading auxiliary member 2 while moving so as to be in a state of being accumulated downward due to gravity exceeding centrifugal force. Dama in Japanese 17 is extinguished.

Next, in the high-speed rotation range B, the kneading mixture is pressed in the kneading cup 3 in the radial direction from the axis of the revolution shaft 12 because the centrifugal force exceeds gravity as shown in FIG. The bubbles in the object 17 are removed and the kneading is completed.

The above description is for the case where the dental alginate impression material is kneaded by using the upper lid 1 to which the kneading auxiliary member 2 is attached. The embodiment shown in FIGS. 9 and 10 is carried out. In the case where the mounting auxiliary member 20 is erected inside the kneading cup receiver 4 as in the example, when the kneading cup 3 made of an elastic material is mounted in the kneading cup receiver 4, As shown in FIG. 10, 3 is deformed according to the position where the mounting assisting member 20 is provided, and a specific unevenness is formed inside thereof. In this state, the powder of the dental alginate impression material and the liquid such as water are metered in predetermined amounts into the kneading cup 3 so that they are located above the kneading cup receiver 4 by a predetermined distance. After closing the upper opening of the kneading cup 3 with the lid 18 provided on the support member 19 and then turning on the switch, the drive motor mounted in the base 16 according to a command from the control circuit. As shown in FIG. 6, 14 is driven to rotate its rotary shaft at a low speed in the low speed rotation range A and then at a high speed in the high speed rotation range B by at least two stages of constant speed rotation.

In this embodiment, the kneading cup 3 is deformed in accordance with the position where the mounting assisting member 20 is placed, and the unevenness generated inside the kneading cup 3 serves as the kneading assisting member 2 of the above-described embodiment. Become. Thus, when the kneading cup 3 is taken out after completion of the kneading, the kneading product 17 can be taken out easily because the kneading cup 3 made of an elastic material returns to its original shape by the restoring force.

Although not particularly shown in the present invention, a structure having both the kneading auxiliary member 2 and the mounting auxiliary member 20 described above in order to more effectively eliminate the lumps in the kneaded material 17. Is more preferable.

[0029]

The dental alginate impression material kneading apparatus according to the present invention, which has been described in detail above, rotates a kneading cup containing a kneaded product composed of dental alginate impression material powder and a liquid such as water. In a device equipped with a mechanism for revolving while rotating, the constant-speed rotation range of the drive motor is set to low-speed rotation at least in the initial stage, and the kneaded product moves so as to be in a state of being accumulated downward due to gravity exceeding centrifugal force. While the kneading auxiliary member and / or the mounting auxiliary member is deformed according to the deployment position, the unevenness generated inside the kneading cup is agitated so that the lumps in the kneaded product are eliminated. In the kneading device, the kneading cup containing the kneaded product, which has been required to be manually cumbersome before being attached to the device, becomes unnecessary.

Then, the low speed rotation is followed by the high speed rotation and the centrifugal force applied to the kneaded product overcomes the force of gravity to press the kneaded product into the kneading cup in the radial direction from the axis of the revolution shaft. Therefore, the bubbles in the kneaded product will be removed. Therefore, even if various alginate impression materials of each company are used, it is possible to thoroughly mix the generation of lumps and the removal of air bubbles without requiring human labor, and the dentist according to the present invention having such an effect. Alginate impression material kneading equipment for use has a great contribution to the dentistry field.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory diagram of a dental alginate impression material kneading device according to the present invention.

FIG. 2 is an explanatory view showing another embodiment of the upper lid to which a kneading auxiliary member is attached.

FIG. 3 is an explanatory view showing still another embodiment of the upper lid to which a kneading auxiliary member is attached.

FIG. 4 is a vertical cross-sectional view of another aspect of the upper lid having a structure to which a kneading auxiliary member is attached.

FIG. 5 is a bottom view of FIG.

FIG. 6 is an explanatory diagram showing a change in rotation speed over time.

FIG. 7 is a state explanatory view of the inside of a kneading cup for explaining a state in which lumps are eliminated from the kneaded product.

FIG. 8 is a state explanatory view of the inside of a kneading cup for explaining a state of removing bubbles mixed in the kneaded product.

FIG. 9 is a perspective explanatory view showing a kneading cup receiver and a kneading cup provided with a mounting auxiliary member.

10 is a perspective explanatory view showing a state where a kneading cup is attached to the kneading cup receiver shown in FIG. 9. FIG.

[Explanation of symbols]

1 Top cover 1a sliding groove 1b Kneading cup locking protrusion 2 Kneading auxiliary member 2a Rotation axis 2b Rotating shaft support 2c through hole 2d thumbscrew 2e split groove 2f sealing plate 3 kneading cup 4 kneading cup receiver 4a belt groove 5 Presser 6 rotation axes 7 Bearing storage box 7a bearing 8 pulleys 9 Belt guide 9a support 10 belt 11 Revolving board 12 Revolution axis 13 Belt pulley 13a bearing 14 Drive motor 14a Motor pulley 15 belt 16 bases 17 Kneaded product 18 lid 19 Support member 20 Mounting aid A low speed rotation range B high speed rotation range

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-63-310629 (JP, A) Japanese Patent Publication No. 5-32110 (JP, B2) US Patent 1751097 (US, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) A61C 9/00

Claims (8)

(57) [Claims] 1. A kneading cup containing a weighed powder of dental alginate impression material and a pre-weighed liquid such as water.
In the dental alginate impression material kneading device, which is provided with a mechanism for revolving (3) while revolving, the rotational force of the driving motor (14) is obtained by the driving motor (14). ) Is set so as to perform at least two stages of constant speed rotation of an initial low speed rotation range (A) and a subsequent high speed rotation range (B), and the kneading cup (3) has its upper opening. A kneading cup upper lid (1) having a kneading auxiliary member (2) protruding into the kneading cup (3) on the lower surface of the upper lid for closing is provided and / or the kneading cup ( It is characterized in that it is provided with a mounting auxiliary member (20) for deforming the kneading cup (3) mounted on the kneading cup receiver (4) for holding 3) and forming unevenness on the inner surface thereof. Dental alginate impression material kneading equipment. 2. The kneading auxiliary member (2) is an upper lid for a kneading cup.
The dental alginate impression material kneading device according to claim 1, which is integrally molded with (1). 3. A kneading auxiliary member (2) is an upper lid for a kneading cup.
A rotary shaft (2a) held by a rotary shaft support (2b) provided on the lower surface of (1) is rotatable in the radial direction from the center of the upper lid (1). The apparatus for kneading dental alginate impression material according to 1. 4. The kneading auxiliary member (2) is an upper lid for a kneading cup.
The dental alginate impression material according to claim 1, wherein the dental alginate impression material is fixed by sliding along a slotted sliding groove (1a) provided in the upper lid (1) in a radial direction from the center of (1). Kneading equipment. 5. The dental alginate impression material kneading device according to claim 4, wherein a sealing plate (2f) is provided on the inner side facing the sliding groove (1a). 6. The dental alginate impression material kneading according to any one of claims 1 to 5, wherein the kneading auxiliary member (2) is provided with a through hole (2c) or a split groove (2e). Japanese device. 7. The ratio of the number of rotations of the drive motor (14) in the high speed rotation range (B) to the number of rotations in the low speed rotation range (A) is 3 to 6 times. The dental alginate impression material kneading apparatus according to any one of claims. 8. In the low speed rotation range (A) of the drive motor (14)
The dental alginate impression according to claim 7, which is set to rotate at a rotation number of 100 to 150 rpm and a revolution number of 400 to 500 rpm for 3 to 6 seconds and to rotate for 12 to 20 seconds in a high speed rotation range (B). Material mixing device.