JPH1128346A - Hermetically sealing structure of stirring mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent intrusion of stirred material into a mechanism of a stirring mixer and prevent mixing of foreign matter into stirred material while an inside of a container is pressurized or reduced in pressure by a method wherein an outer diameter of a revolution seal component is set as finely as possible while a rotation shaft is sealed, a sealing property is improved by lowering a periphery speed, and a life of a seal ring is prolonged. SOLUTION: A container 20 and a cover member 30 are fixed to a frame 10. A revolution hub 40 is freely revolvably fitted to a support hole 32 of a central part of the cover member. A rotation shaft 50 is freely rotatably passed through the revolution hub. A stirrer 60 is fixed to a container side of the rotation shaft. The revolution hub and the rotation shaft are revolved and rotated with a drive mechanism 7 provided to an opposed container side of the revolution hub, and the stirrer is revolved and rotated in the container. Then, the revolution hub is divided into a revolution seal member 41 fitted to the support hole and a rotation seal member 42 positioned in the container. Seal rings 81, 82 are provided in a gap C1 between the revolution seal member and the support hole, and a seal structure 92 is provided in a gap C2 between a rotation seal member and the rotation shaft.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of a stirrer / mixer in which a stirrer is put into a container, and the stirrer is mixed by stirring the stirrer. The present invention relates to a structure for improving the tightness of a container at the time.

[0002]

2. Description of the Related Art Conventionally, for example, as shown in FIG. 3, a flour or the like which is a raw material of bread dough is put in a container and stirred and mixed. The shaft (b) is vertically penetrated, the upper end is rotated by the belt transmission mechanism (c), and the revolving hub (2) is fixed to the lower end, and the revolving shaft (e) is rotated on the revolving hub (2). The gear (f) fixed to the upper end is meshed with the internal gear (g) fixed to the frame (a), and a stirrer (not shown) is attached to the lower end. It is known that a bottomed cylindrical container (h) is arranged on the lower side so as to receive the stirrer, and the upper peripheral edge thereof is fixed to the frame (b). In this stirring mixer, when the revolving shaft (b) is rotated by the belt transmission mechanism (c), the revolving hub (d) rotates and the revolving shaft (e) revolves around the revolving shaft (b), The rotating shaft (e) rotates by the orbital movement of the gear (f) with respect to the internal gear (g), whereby the stirrer revolves and rotates in the container (h), and the flour and the like put in the container (h) are removed. Stir and mix well.

[0003]

However, when it is necessary to stir while pressurizing the inside of the container instead of mixing the stirring substances under normal pressure as described above, for example, as shown by an arrow in FIG. The stirred substance in (h) enters between the revolving hub (d) and the frame (b) due to the pressure difference,
It adheres to the inside gear (f) and the internal gear (g), causing problems. In addition, when it is necessary to stir while depressurizing the inside of the container (h), foreign substances such as grease adhered to the gear (f) and the internal gear (g) enter the container (h) by a pressure difference by a reverse route. However, there is a problem that the quality is deteriorated by being mixed with the stirring substance.

The present invention has been made in view of such a point, and an object of the present invention is to provide a revolving hub comprising a revolving seal member rotatably fitted in a support hole near a container opening, and a revolving seal member. By dividing the shaft seal structure into a rotation seal member having a built-in shaft, the outer diameter of the orbital seal member, which is a seal portion where the peripheral speed is maximized, is made as large as possible while sufficiently sealing the rotation shaft. The peripheral speed is reduced by setting it to be thinner, the sealing performance is improved, the life of the seal ring is extended, and the stirring substance is stirred inside the mechanism of the stirring mixer that pressurizes or depressurizes the inside of the container. An object of the present invention is to surely prevent intrusion of foreign matter into a stirring substance and intrusion.

[0005]

In order to achieve the above object, a sealed structure of a stirring mixer according to the present invention is characterized in that a bottomed cylindrical container and a lid member for closing the container are fixed to a frame. A revolving hub is rotatably fitted in a support hole opened at the center of the lid member, a revolving shaft is rotatably passed through the revolving hub, and a stirrer is fixed to the container side of the revolving shaft. A revolving seal member for rotating the revolving shaft by a driving mechanism provided on the side opposite to the container of the revolving hub to revolve and revolve the stirrer in the container, and to fit the revolving hub into the support hole. And a rotation seal member positioned in the container, and a seal ring is mounted in a gap between the revolving seal member and the support hole facing the container, while the rotation seal member seals a gap between the rotation shaft and the rotation shaft. That the seal structure It is a symptom.

In this sealed structure of the stirring mixer, when the revolving hub and the rotation shaft are rotated by the drive mechanism, the stirrer revolves and rotates in the container. In this case, if the pressure in the container is increased or reduced, the stirring substance and foreign matter may flow through the gap between the revolving hub and the support hole and the gap between the revolving hub and the rotation shaft. Is divided into a revolution seal member and a rotation seal member, so that a sufficient seal structure can be provided between the rotation seal shaft and the rotation shaft without being limited in space inside the rotation seal member. In addition, the outer diameter of the revolving seal member can be set as small as possible while allowing the seal ring to be mounted. As a result, the sealability of the container is improved.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a stirring and mixing machine having a sealed structure according to the first embodiment.

In FIG. 1, reference numeral 10 denotes a plate-like frame in a stirrer-mixer installed in a work place. The frame 10 is installed substantially horizontally, and has a mounting hole 11 opened therein.

Reference numeral 20 denotes a bottomed cylindrical container disposed on the lower side of the frame 10. The container 20 has a flange 21 formed on the periphery of the opening at the periphery of the mounting hole 11 of the frame 10. For example, it is airtightly attached to the frame 10 by being attached by bolting. This container 20 has an upper part 22 and a lower part 23 in the middle.
The flange portions formed in the divided portions are joined together via a packing 24, and the flange portions are sandwiched by, for example, a clamp 25 divided in half in the circumferential direction to be detachably and air-tightly combined. ing. The stirring substance is taken in and out by removing the clamp 25 and removing the lower part 23 from the upper part 22.

Reference numeral 30 denotes a bearing case as a lid member for closing the container 20 above the frame 10.
The bearing case 30 is attached to the mounting hole 1 of the frame 10.
1 is airtightly fitted to the frame 10 by being fitted with an intaglio via an O-ring 31, and is fixed to the frame 10 by being fastened together with the container 20 with, for example, the above-mentioned bolts. A support hole 32 is formed in the center of the bearing case 30, and a bearing hole 33 having a larger inside diameter is formed above the support hole 32, and a ball bearing 34 is housed in the bearing hole 33. Have been.

A revolving hub 40 is fitted in the support hole 32 of the bearing case 30 and is closely fitted to an inner ring of a ball bearing 34 and is rotatably supported. A rotation shaft 50 is rotatably penetrated through the revolving hub 40, and the stirrer 6 is attached to the container side of the rotation shaft 50.
0 is fixed. FIG. 1 illustrates a stirrer 60 in which two oblique baffle bars are fixed in a frame, but the present invention is not limited to this shape. Further, in FIG. 1, two rotation shafts 50 are provided, but one or three or more rotation shafts may be set. The stirrer 60 may be detachable from the rotation shaft 50, and FIG. 1 shows that the stirrer 60 is attached to only one of the two rotation shafts 50 and the other stirrer 6
The state where 0 is not attached is illustrated. In this case, the stirring is performed by only one stirrer 60. If the stirrers 60 are attached to both the rotation shafts 50 so that they do not interfere with each other, the two stirrers 60 can stir. The drive mechanism 70 for the revolving hub 40 and the rotation shaft 50 is provided on the side of the revolving hub 40 opposite to the container (in the embodiment, the upper side). That is, the revolving hub 40
A driven pulley 71 is fixed on the upper side of
A revolving input shaft 73 driven by a motor or the like and having a driving pulley 72 is provided on the frame 10, and a belt 74 is wound around both pulleys 71, 72. The child 60 revolves in the container 20. A driven gear 76 is fixed to the rotation shaft 50 protruding above the revolving hub 40, and the frame 10 has a rotation input provided with a driving gear 77 driven by a motor or the like and meshing with the driven gear 76. A shaft 78 is provided, by which the rotation shaft 5
By rotating 0, the stirrer 60 rotates in the container 20.

The revolving hub 40 is divided into a revolving seal member 41 fitted in the support hole 32 and a revolving seal member 42 located in the container 20, and these are joined by, for example, bolting. I have. And container 2
A seal ring is provided in a gap C1 between the revolution seal member 41 and the support hole 32 facing the inside of the cylinder. In FIG.
This is a pressure reducing oil seal 8 provided on the side close to the container 20.
1 and a pressure oil seal 82 provided on the side far from the container 20. However, when only one of pressure reduction and pressure application is performed, only one of them may be mounted. Further, the rotation seal member 42 is provided with a seal structure for sealing a gap C2 with the rotation shaft 50.
That is, a ball bearing 91 that rotatably supports the rotation shaft 50 is housed in the rotation seal member 42,
An oil seal 92 is mounted on the side facing the inside of the container.

The upper part 2 of the container 20 which is a fixed side.
2, the air inlet / exhaust port 26 is open, and air is supplied from outside to the container through the air inlet / exhaust port 26 to pressurize the inside of the container, or from inside the container to the outside via the air inlet / outlet port 26. Air is sucked and discharged to reduce the pressure inside the container.

In the first embodiment, when the inside of the container 20 is pressurized, the gap C1 between the revolving hub 40 and the support hole 32,
In addition, there is a possibility that the agitated substance flows in the direction indicated by the solid arrow in FIG. 1 via the gap C2 between the revolving hub 40 and the rotation shaft 50. Conversely, if the pressure in the container 20 is reduced, there is a possibility that foreign matter flows in the direction indicated by the broken arrow in FIG. 1 through the gap C1 and the gap C2. However, since the revolving hub 40 is divided into the revolving seal member 41 and the revolving seal member 42, the oil seal 92 is inserted into the gap C 2 between the revolving shaft 50 and the interior of the revolving seal member 42 without being restricted by space. Thus, a sufficient sealing structure can be provided. Moreover, the outer diameter of the revolving seal member 41 can be set as small as possible while allowing the oil seals 81 and 82 to be mounted without being affected by the sealing structure of the gap C2.
As a result, the peripheral speed of the seal portion where the peripheral speed becomes the largest is reduced, so that the sealing performance of the gap C1 by the depressurizing oil seal 81 and the pressurizing oil seal 82 can be improved, and the oil seals 81 and 82 can be improved. The life can be extended, and the sealing performance of the container 20 can be improved. Therefore, at the time of pressurizing the container, it is possible to reliably prevent the stirring material from entering the inside of the mechanism of the stirring mixer such as the drive mechanism 70 such as the gears 76 and 77 and the ball bearing 34, thereby maintaining the performance of the stirring mixer. In addition, at the time of depressurization of the container, it is possible to reliably prevent foreign substances such as grease adhering to the gears 76 and 77 from being mixed into the stirred substance in the container, and to eliminate poor quality of the stirred substance.

FIG. 2 shows a second embodiment. Members that perform the same functions as in the first embodiment are given the same reference numerals, and descriptions thereof are omitted. In this embodiment, the rotation input shaft 78 is not provided, and the rotation input shaft 72 drives the rotation shaft 50. That is, the internal gear 101 is provided on the frame 10 above the driven pulley 71, and the internal gear 1
The rotating shaft 50 is rotated by meshing the driven gear 76 of the rotating shaft 50 with 01. In addition, in FIG.
Although the number of 0 and the stirrer 60 is one, it may be two as in the second embodiment or more.

In the second embodiment, the same functions and effects as those of the first embodiment can be obtained, but there is an advantage that only one motor or the like is required.

In the above embodiment, the oil seals 81 and 82 are used as seal rings, but other types of seal rings may be mounted. Further, although the oil seal 92 is used as the seal structure of the rotation shaft, it is not always necessary to use such a seal ring. For example, a labyrinth seal or another known seal structure can be used instead.

[0018]

As described above, according to the sealing structure of the agitating mixer of the first aspect, a sufficient sealing structure between the rotation shaft and the rotation shaft is provided without any space limitation inside the rotation sealing member. In addition to being able to provide the seal ring, the outer diameter of the revolving seal member can be set as small as possible while allowing the seal ring to be mounted. Therefore, the peripheral speed is reduced to improve the sealability and extend the life of the seal ring. And the hermeticity of the container can be improved. Therefore, when the inside of the container is stirred while being pressurized or depressurized, intrusion of the stirring substance into the inside of the mechanism of the stirring mixer can be reliably prevented, and the performance of the stirring mixer can be maintained, and foreign matter is mixed into the stirring substance. And the quality of the stirred substance can be eliminated. Therefore, the sealed structure of the present invention is suitable for application to, for example, a stirring and mixing machine that treats foods, chemicals, chemicals, and the like as stirring substances.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment.

FIG. 2 is a longitudinal sectional view showing a second embodiment.

FIG. 3 is a longitudinal sectional view showing a conventional example.

[Explanation of symbols]

REFERENCE SIGNS LIST 10 frame 20 container 30 bearing case (lid member) 32 support hole 40 revolving hub 41 revolving seal member 42 rotating seal member 50 rotating shaft 60 stirrer 70 drive mechanism 81 depressurizing oil seal (seal ring) 82 pressurizing oil seal (seal) Ring) 92 Oil seal (seal structure) C1 Gap between the above-mentioned revolving seal member facing the inside of the container and the support hole C2 Gap between the revolving seal member and the revolving shaft

Claims (1)

[Claims] 1. A bottomed cylindrical container and a lid member for closing the container are fixed to a frame, and a revolving hub is rotatably fitted into a support hole opened at the center of the lid member. A rotation shaft is rotatably penetrated through the hub, a stirrer is fixed to the container side of the rotation shaft, and the revolving hub and the rotation shaft are rotated by a driving mechanism provided on the opposite container side of the rotation hub to rotate the stirrer. While being configured to revolve and rotate in the container,
The revolving hub is divided into a revolving seal member that fits in the support hole, and a revolving seal member located in the container,
Sealing of the stirring and mixing machine, wherein a seal ring is mounted in a gap between the revolving seal member facing the inside of the container and the support hole, and a seal structure for sealing the gap between the revolving seal member and the revolving shaft is provided. Construction.