JPH0323301Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a proposal for specifying the rotation ratio of both shafts in a pan-type mortar mixer that has an autorotation shaft equipped with a rotating stirring blade and a revolving shaft equipped with a revolving stirring blade. When mixing mortar using a conventional pan-type mixer, it is extremely difficult to obtain uniform and high-quality mortar under the same conditions of rotation of the rotation axis and revolution axis as for concrete mixing. Even if the number of cements is further increased or the mixing time is further extended, there are differences such as the fact that the cement capacity per unit volume is larger than that of concrete mixing and there is no coarse aggregate, so it will not cause lumps. This resulted in poor mixing, such as the formation of cement lumps. Therefore, in this invention, we increased the rotational speed of the rotational axis compared to that of conventional mixers, and focused on the rotational revolution ratio, which is the ratio of the rotational speed of the rotational axis and the revolutional axis, and conducted intensive research and tests to improve this. By setting the rotation speed to a rotation/revolution ratio in the range of 4.5 to 7 times the revolution speed, it is possible to mix uniform and high quality mortar in a short time. Here, the revolution speed is the revolution speed of the revolution axis,
Furthermore, the rotation speed is the rotation speed of the rotation axis. The rotation ratio between the two is expressed by the following equation depending on whether the rotation direction of each axis is the same or opposite. When the direction of rotation of the rotation axis and the revolution axis is the same: Rotation speed = (i + 1) n When the rotation direction of the rotation axis and the revolution axis is opposite: rotation speed = (i - 1) n Here, i...speed change Absolute rotation ratio determined by the mechanism n...Revolutionary rotation speed The embodiment of the present invention described above will be explained in detail with reference to the attached drawings. The container 1 with a bottom is an annular bread-shaped container formed by an outer wall 2 and an inner wall 3, and a revolution shaft 4 connected to a drive source is rotatably provided at the center of the inner wall 3. It is being Revolution axis 4
A hollow horizontal box-shaped support member 5 is provided at the upper end of the support member 5 and is integrally formed with the support member 5. A gear 6, a lower intermediate gear 7 that meshes with the gear 6, an upper intermediate gear 8 that is fixed to the lower intermediate gear 7 and rotates in the same direction, and a planetary gear 9 that meshes with the upper intermediate gear 8 are housed. Intermediate shaft 10 and rotational shaft 11 of 7, 8 and 9
is supported perpendicularly to the horizontal surface of the support member 5. As shown in the figure, the rotation axis 11 of the planetary gear 9 is arranged at an intermediate position between the outer wall 2 and the inner wall 3, and two flat plate-shaped rotation blades 12 are fixed to the lower end thereof at symmetrical positions. has been done. On the other hand, the plurality of flat plate-shaped revolving blades 13 are attached to appropriate positions on the support member 5 via arms. In order to change the rotation/revolution ratio here, the number of teeth of the lower intermediate gear 7 and the upper intermediate gear 8 may be changed. However, the horizontal box-shaped support member 5 is provided with a plurality of holes 14 and 15 in order to enable support of the intermediate shaft even if the distance between the intermediate shafts 10 changes. In the figure, arrow 16 indicates the rotation direction of the rotation axis, and arrow 17 indicates the rotation direction of the revolution axis. Other examples of the rotating blade shape include a rotating blade 18 as shown in the second figure which has the effect of pressing down the material downward, and a rotating blade 12 as shown in the third figure.
There is a rotating blade 19 whose width is half that of the width of the blade. The rotation ratio between the rotation axis and the revolution axis of the mixer in this embodiment is expressed by the following equation. Rotation ratio = [Rotation axis rotation speed / Revolution axis rotation speed] = (i-1
)=[Number of teeth of fixed gear 6/Number of teeth of lower intermediate gear 7×Number of teeth of upper intermediate gear 8/Number of teeth of planetary gear 9]-1 Next, using the mixer having the structure of this embodiment, In order to find out the optimal rotation ratio between the rotation axis and the revolution axis, Table 3 shows the results of tests conducted by keeping the rotation speed of the revolution axis constant (50 rpm) and changing the rotation speed of the rotation axis, that is, the rotation-revolution ratio. . Table 1 shows the types of materials used in this test, and Table 2 shows the formulations of the materials used in this test. In addition, the bread-type mixer used has an inner diameter of the outer wall 2.
948mm, the outer diameter of the inner wall 3 is 216mm, the distance between the revolution axis and the rotation axis is 300mm, the rotation speed of the revolution axis is 50r.pm, which is the same as the conventional mixer, and the capacity of the mortar to be mixed is Batch ^0.05m3 . be. The ratio of breathing rate in Table 3 is the ratio of the breathing rate tested according to JIS A 1123 and
When the rotation ratio is 6.1, it is expressed as 100. The smaller this value is, the better the quality of the mortar. The ratio of compressive strength in Table 3 refers to the compressive strength when tested according to JIS A 1132 and JIS A 1108, when the specimen has a compressive strength at 28 days old, and when the rotating blade 12 is used and the rotation ratio is 6.1.
Expressed as 100. The larger this value is, the better the quality of the mortar. In Table 3, when the rotation ratio was 4 or less, the stirring effect of the rotating blade was small, the breathing rate and compressive strength were both poor, and furthermore, the occurrence of lumps was observed. Furthermore, when the rotation ratio was 7.5 or more, the kneaded material was scattered more violently by the rotating blades, and there was a tendency for the kneaded material to separate. In the latter case of 7.5 or more, we tried using a rotating blade 19 with a small width for the purpose of another test, that is, to prevent the mixed material from scattering, and although the scattering could be prevented, the stirring effect of the rotating blade was not as expected. I couldn't help it. Furthermore, although it is not listed in Table 3, when we tried using the same rotating blades 12 by lowering only the rotational speed of the revolving shaft, we were able to prevent the desired scattering, but the stirring effect of the revolving blades decreased and a good mortar could not be obtained. I couldn't help it. Neither test yielded the expected results. As is clear from the above tests, a pan-type mortar mixer that has both an autorotation shaft with rotating blades that rotates on its own axis and a revolution shaft with revolving blades that revolves around its axis is used when the rotation-revolution ratio of both axes is in the range of 4 to 7.5. We investigated the fact that the stirring effect of the rotating blades and revolving blades can be effectively utilized, and in order to obtain a uniform and high-quality dough, it is preferable to use the stirring effect in the range of 5 to 7 to maximize the stirring effect. did. Therefore, even though the mixer of the present invention has the same rotational speed of the revolving shaft as the conventional pan-type mixer, the rotational speed of the rotating shaft is increased, so the compressive strength and breathing are improved.

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【table】 [Brief explanation of drawings]

Fig. 1 is a perspective view showing a part of the cut surface, Fig. 2
3 are perspective views showing other examples of rotating blades. 1... Container, 2... Outer wall, 3... Inner wall, 4
...Revolution axis, 5... Support member, {7... Lower intermediate gear, 8... Upper intermediate gear} Intermediate gear, 10...
Intermediate axis, 11... Rotation axis, 12, 18, 19...
Rotating blade, 13...revolving blade.

Claims (1)

[Claims for Utility Model Registration] (1) An inner wall, a bottomed cylindrical container with the inner wall in the center, a revolving axis passing through the center of the inner wall, and an upper end of the revolving axis a support member provided at the support member; a rotation axis provided at the outer end of the support member;
A pan-type mortar mixer characterized in that a mixer comprising a rotating blade provided at the lower end of the rotating shaft and a revolving blade attached to the supporting member is formed in the following structure. The shaft 11 is provided parallel to the inner surface of the outer wall 2 and the outer surface of the inner wall 3 of the container 1; (a) the rotational speeds of the revolution shaft 4 and the rotation shaft 11 are
The rotation-revolution ratio is within the rotational speed range of 4.5 to 7 times that of the revolution axis 4. (2) The rotation/revolution ratio is the fixed gear 6 fixed to the upper part of the inner wall 3, the planetary gear 9 fixed to the rotation shaft 11, and the gear shaft provided at an intermediate location between the fixed gear 6 and the planetary gear 9. A pan-type mortar mixer according to claim 1, characterized in that it is obtained by a planetary gear mechanism formed by an intermediate gear fixed to a base plate. (3) The pan-type mortar mixer according to claim 2, wherein the intermediate gear is formed of a lower intermediate gear 7 and an upper intermediate gear 8. (4) Utility model registration claim 1, characterized in that the rotation axis 11 is disposed at an intermediate location between the inner surface of the outer wall 2 and the outer surface of the inner wall 3 of the container 1.
Pan type mortar mixer as described in Section 1. (5) Two rotation axes 11 are provided, and each axis has two rotation axes.
A pan-type mortar mixer according to claim 1, wherein the rotating blades 12 are provided at axially symmetrical positions.