JP2018136029A - Shaft seal member, shaft seal device for rotational shaft, horizontal-type mixer, and mixer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shaft seal device for a rotational shaft having a simple configuration which excellently facilitates decomposition thereof and in which a seal member can be easily cleaned and exchanged.SOLUTION: A shaft seal device of a rotational shaft includes: a casing 11 having an object stored therein; a rotational shaft 12 provided so as to penetrate the casing 11 and driven to rotate; split-type seal rings 13a, 13b provided around the rotational shaft 12 which projects outwardly while penetrating the casing 11, an outer periphery of the seal rings being detachably fitted to the casing 11; a groove 14 for sealing formed on an inner periphery of the seal rings 13a, 13b so as to face the rotational shaft 12; and split-type pressing plates detachably supported to an outer end part of the seal rings. Further, provided are a horizontal-type mixer having the shaft seal device of the rotational shaft and the shaft seal member and a mixer.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a shaft sealing member for preventing the contents in the casing from leaking outside through the gap between the rotating shaft and the rotating shaft at a location where the rotating shaft to be rotated passes through the casing. The present invention relates to a shaft seal device and a horizontal mixer and a mixer having the shaft seal device.

Conventionally, a gland packing system has been the mainstream for shaft seal devices used in horizontal mixers suitable for foods.
However, this gland packing type shaft seal device has a number of parts and a complicated structure, and has disadvantages such that it is not easy to disassemble at the time of cleaning, and the cost of the device is increased.

  For example, in the shaft seal device for a food mixer disclosed in Japanese Patent Application Laid-Open No. 2010-41970, a through hole 8 is formed in the peripheral wall 4 of the tank 3 as shown in FIG. Further, the outer diameter portion of the gland packing 110 is fitted inside the annular housing 9, and the inner diameter portion of the gland packing 110 is provided around the small diameter portion 15 of the shaft 1. .

  When the shaft seal device having such a structure is cleaned, as shown in FIG. 5 of the same publication, when the nut 26 is rotated and loosened, the bolt 120 is swung around the pin 23 and the radial groove 121 is removed. It will be extracted. Therefore, the annular cap 19 can be moved to the outside of the tank 3 and removed from the through-hole 8. However, as described above, the attachment and detachment of the gland packing 110 are difficult to handle and the structure is complicated. Therefore, disassembly at the time of cleaning is not easy, and further, there are disadvantages such as an increase in the cost of the apparatus.

JP 2010-41970 A

  Conventionally, for example, a gland packing system has been the mainstream of shaft seal devices used in horizontal mixers. This gland packing type shaft seal device has drawbacks such as that disassembly during cleaning is not easy, the number of parts is large, and the structure is complicated. For this reason, there has been a demand for a shaft seal device for a rotary shaft that has a simple structure, is extremely easy to disassemble, and can be easily cleaned or replaced.

An object of the present invention has been made in view of such a problem. In a portion where the rotational shaft to be rotationally driven penetrates the casing, the structure is simple, the number of parts is small, and maintenance is easy. A shaft seal device and a horizontal mixer are provided.
Another object of the present invention is to provide a shaft sealing member and a mixer that can regulate the movement of the contents between a rotating shaft and a casing through which the rotating shaft passes.

  A first aspect of a shaft sealing device for a rotating shaft according to the present invention includes a casing having a container therein, a rotating shaft provided through the casing and driven to rotate, and penetrating outside the casing. A two-divided seal ring which is arranged around the protruding rotary shaft and whose outer peripheral portion is detachably fitted into the casing; and a sealing groove which is formed on the inner peripheral portion of the seal ring and faces the rotary shaft; A shaft seal device for a rotary shaft comprising a two-part presser plate supported detachably on the outer end of the seal ring, which has a small number of parts and a simple structure.

  The second aspect of the shaft seal device of the rotary shaft according to the present invention is implemented through a plurality of fixing pins in which the attaching / detaching means for the two-divided seal ring and the two-divided presser plate is fixed to the casing. The shaft seal device for a rotary shaft according to the first aspect has an advantage that the seal ring can be attached and detached very easily in the cleaning operation or replacement operation of the seal ring.

  According to a third aspect of the shaft seal device of the rotary shaft according to the present invention, the joint of the divided portions of the two-divided seal ring and the two-divided presser plate is arranged on the same line. The shaft sealing device for a rotating shaft according to the above aspect or the second aspect has an advantage that the leakage of the contents from the casing can be more reliably sealed.

  A first aspect of a horizontal mixer according to the present invention includes a casing having an inside, a rotating shaft provided through the casing and driven to rotate, and a rotation protruding through the casing. A two-part seal ring disposed around the shaft and having an outer peripheral portion detachably fitted in the casing; a seal groove formed on an inner peripheral portion of the seal ring facing the rotary shaft; and the seal ring A rotary shaft shaft seal device comprising a two-part presser plate that is detachably supported at the outer end of the rotary shaft; a bearing unit that rotatably supports the rotary shaft in the casing; and the rotary shaft. A horizontal mixer having a stirring means, wherein the seal ring can be attached and detached very easily in the cleaning operation or replacement operation of the seal ring, and the seal ring structure is 2 Cleaning is also reliable because it is split, and those having the advantage of easily.

  According to a second aspect of the horizontal mixer of the present invention, the means for attaching and detaching the two-divided seal ring and the two-divided retainer plate is implemented through a plurality of fixing pins fixed to the casing. A horizontal mixer having a shaft seal device, wherein the seal ring can be attached and detached very easily in the cleaning operation or replacement operation of the seal ring, and the seal ring structure is divided into two parts to ensure cleaning, And it has the advantage which can be performed easily.

  According to a third aspect of the horizontal mixer of the present invention, there is provided a shaft seal device for a rotating shaft in which the joints of the divided portions of the two-divided seal ring and the two-divided presser plate are arranged on the same line. The horizontal mixer has an advantage that the leakage of the contents from the casing can be more reliably sealed.

A first aspect according to the shaft seal member of the present invention is a shaft seal member that regulates the movement of the contents between the rotation shaft and the casing through which the rotation shaft passes.
A seal ring member disposed on one of the rotating shaft and the casing;
A spiral groove is provided on one of the inner surface and the outer surface of the seal ring member facing one of the rotating shaft and the other inner surface and the outer surface of the casing.

  The 2nd aspect which concerns on the shaft sealing member of this invention is a shaft sealing member of the said 1st aspect, Comprising: The spiral direction of the said groove | channel corresponds with the direction in which the said rotating shaft rotates.

The 3rd aspect which concerns on the shaft seal member of this invention is a shaft seal member of the said 1st or 2nd aspect, Comprising: The said seal ring member is provided, These seal ring members are the said rotating shafts. Removably mounted along the central axis.
It has advantages.

A first aspect according to the mixer of the present invention includes a casing capable of accommodating an article,
A rotating shaft that is rotatable in the casing and penetrates the casing;
An agitation member connected to the rotating shaft for agitating the contents;
The shaft sealing member according to one of the first to third aspects.

  In this specification, the “shaft seal member” is a member for restricting the movement of the contents in the casing to the outside of the casing from the region between the rotating shaft and the casing through which the rotating shaft passes. Means. Further, in this specification, a “shaft seal device for a rotating shaft” includes a casing, a rotating shaft that passes through the casing, a two-part seal ring that is detachably fitted into the casing, and an inner portion of the seal ring. It means an apparatus comprising a sealing groove formed in the peripheral portion and a two-part presser plate that is detachably attached to the two-part seal ring. Further, in this specification, the “half member” not only means each member when one part is composed of two members, but also when one part is composed of three or more members. This means each member.

  According to one aspect of the shaft sealing device of the rotating shaft according to the present invention, since the seal ring and the presser plate have a divided portion structure, the seal ring and the presser plate can be attached to and detached from the rotary shaft even if the space in the rotating shaft direction is small. There is an advantage that it is easy and the sealing ring can be easily cleaned or replaced. Moreover, according to the aspect of the shaft seal device of the rotating shaft according to the present invention, there is an advantage that the number of parts can be reduced, the cost of the device can be reduced, and the maintenance work can be facilitated.

  Furthermore, one aspect of the mixer having one aspect of the shaft sealing device for the rotating shaft described above can easily attach and detach the seal ring even if the space between the shaft sealing device and the structure supporting the rotating shaft is narrow. Similarly, there is an advantage that the sealing ring can be easily cleaned or replaced.

  According to the aspect of the shaft seal member or the mixer of the present invention, it is possible to restrict the movement of the stored item between the rotating shaft and the casing through which the rotating shaft passes.

It is a schematic longitudinal view which cuts and shows the principal part structure of the horizontal mixer using the shaft sealing apparatus of the rotating shaft which concerns on 1st Example of this invention. It is a longitudinal cross-sectional view which expands and shows the shaft-seal apparatus of the rotating shaft which shows a part of FIG. It is a front view which expands and shows the fixing pin 30 shown by FIG. FIG. 3 is a plan view showing a two-part seal ring according to the shaft seal device of the rotary shaft in FIG. FIG. 3 is a plan view showing a two-part presser plate according to the shaft seal device of the rotary shaft in FIG. FIG. 3 is a plan view showing an attached state of a two-divided seal ring and a two-divided presser plate according to the shaft seal device of the rotary shaft in FIG. 2. FIG. 3 is a plan view showing a state in which the two-part clamp plate is removed in order to release the assembled state of the two-part clamp plate and remove the two-part seal ring according to the shaft seal device of the rotary shaft in FIG. 2. (A) is a top view of the 2 split type seal ring arrange | positioned on the right side of the rotating shaft 12 based on the 2nd Example of this invention, (b) is the half member of a 2 split type seal ring. (C) is an enlarged schematic view schematically showing a part indicated by an arrow VIIIc in FIG. 8 (b). (A) is a top view of the 2 split type seal ring arrange | positioned on the left side of a rotating shaft based on 2nd Example of this invention, (b) is the half member of a 2 split type seal ring. It is a front view, (c) is an enlarged schematic diagram schematically showing a part indicated by an arrow IXc in FIG. 9 (b). (A) is a schematic plan view of the horizontal mixer 1, (b) is a schematic partial cutaway front view of the horizontal mixer 1 shown in FIG. 10 (a), and (c) is FIG. 10 (a). 2 is a schematic side view of the horizontal mixer 1 shown in FIG. These are the longitudinal cross-sectional views which show the principal part of the food mixer using the shaft seal apparatus of the rotating shaft of a prior art example.

In the following description, the same components are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First embodiment]
A shaft seal device for a rotating shaft according to a first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a schematic longitudinal cross-sectional view showing the main configuration of a horizontal mixer 1 provided with a shaft seal device for a rotating shaft according to the present embodiment.
That is, the storage 10 is stored inside a tank (hereinafter referred to as a casing) 11 that constitutes the horizontal mixer 1. A rotating shaft 12 that is rotationally driven is supported on the casing 11 by a driven shaft side bearing unit 20 and a driven shaft side bearing unit (not shown). A frame 21 that supports the casing 11 and the bearing unit 20 is disposed at the tip of the driven shaft side bearing unit 20. The frame 21 is also disposed on the driven shaft side bearing unit side (not shown). In the casing 11, a plurality of agitators (hereinafter referred to as stirring rods) 17, 18 which are stirring members for stirring food are attached.

  A rotating shaft 12 that penetrates and protrudes outside the casing 11 is disposed at a predetermined distance from the outer peripheral surface 12a of the rotating shaft 12, and the outer peripheral portion 2 is detachably fitted into the casing 11. Split seal rings 13a and 13b (that is, shaft seal members) are attached to a plurality of fixing pins 30 fixed to the casing 11 so as to be freely fitted. For example, a plurality of annular grooves 14 are formed as sealing grooves at portions of the seal rings 13a and 13b facing the outer peripheral surface 12a of the rotary shaft 12. The annular groove 14 serves as a so-called labyrinth groove and provides a sealing action for the contents 10 in the casing.

Two split-type pressing plates 15a and 15b, which are detachably supported by the fixing pins 30, are attached to the outer ends of the seal rings 13a and 13b.
As shown in FIG. 4, the two-divided seal rings 13a and 13b are configured to form a circle with resin-divided semi-circular seal rings 13a and 13b. When the seal rings 13a and 13b are attached to the fixing pin 30, the joints are arranged at positions shifted by minus 60 ° from the center line as shown in the figure. Each of the seal rings 13a and 13b is provided with three through holes 13c at symmetrical positions, and a total of six through holes 13c. The fixing pin 30 is fitted into these through holes 13c. The shape of the fixing pin 30 is shown in FIG. That is, FIG. 5 formed in the screw part 30a screwed into the casing 11, the shaft part 30b inserted into the through hole 13c of the seal rings 13a and 13b shown in FIG. 4, and the two-part presser plates 15a and 15b. The shaft portion 30c is inserted into the through hole 15c shown, and the head portion 30d.

Further, the two-part holding plates 15a and 15b shown in FIG. 5 are fitted into the fixing pins 30 on the seal rings 13a and 13b. The pressing plates 15a and 15b are shown apart from each other in FIGS. 5 and 7, but when they are attached to the fixing pin 30, the semicircular straight portions are aligned with each other as shown in FIG. It is assembled to form a circle.
At this time, as shown in FIG. 4, the joint of the seal rings 13a and 13b is a position deviated by 30 ° + 30 ° = 60 ° minus from the center line YY axis. Placed in. Depending on the characteristics of the contents, the joint of the seal rings 13a and 13b can be arranged on the center line YY axis as a top and bottom in FIG. When it is necessary to improve the outflow prevention performance in order to cope with the characteristics of the contents, it is preferable to shift the joint between the seal rings 13a and 13b and the center line Y-Y axis. In addition, when the seam of the seal rings 13a and 13b is disposed at a position of plus or minus 90 degrees (horizontal direction) with respect to the center line YY axis, the performance of preventing the outflow of the stored items can be maximized.

  On the other hand, as shown in FIG. 5, the holding plates 15a and 15b are each provided with three through-holes 15c for fixing pin insertion. The through hole 15c forms a long hole having a large diameter hole. Further, as shown in FIG. 7, the holding plate 15 a is provided with a small hole 15 e for attaching the engaging part component 22 a of the catch clip 22. Further, the holding plate 15b is provided with a small hole 15f for attaching the clip part 22b of the catch clip 22.

  FIG. 1 shows a state in which the two-divided seal rings 13a and 13b and the two-divided presser plates 15a and 15b are attached in the operating state of the horizontal mixer. FIG. 5 shows this state extracted. That is, the two-divided seal rings 13a and 13b have a cylindrical shape with a flange by assembling the semicircular seal rings 13a and 13b in the arrangement relationship of FIG. At this time, the inner peripheral surface forms a plurality of annular grooves as sealing grooves and faces the rotating shaft 12 to have a sealing effect. Further, the two-part presser plates 15a and 15b shown in FIG. 7 are pressed against the outer end surfaces of the two-part seal rings 13a and 13b. A catch clip 22 is attached to the presser plates 15a and 15b so as to form a circular shape by integrating both of them by elastic force.

  Therefore, the joints at the center of the two-part seal ring 13a, 13b combined as described above are not on the same line as the joints at the center of the combined two-part presser plates 15a, 15b. Since the eyes are shifted, it has the effect of increasing the sealing effect of the mixer contents.

Next, a procedure for removing the seal rings 13a and 13b from the shaft seal device of the rotary shaft when the horizontal mixer is stationary in order to clean or replace the seal rings 13a and 13b will be described.
FIG. 2 shows a state in which the seal ring 13a, 13b is taken out by disassembling the shaft seal device of the rotating shaft of the horizontal mixer 1.

  First, as shown in FIG. 7, both parts 22a and 22b are separated in order to release the tightening state between the engaging part 22a and the clip part 22b. Thereafter, the holding plates 15 a and 15 b are pulled out to the side, and then pulled forward. Next, the two-divided seal rings 13a and 13b are removed from the rotary shaft 12. In this way, each seal ring 13a, 13b can be cleaned individually or a new seal ring 13a, 13b can be easily replaced.

  As described above, the shaft seal device of the rotary shaft and the horizontal mixer having the shaft seal device according to the first embodiment of the present invention can very easily attach and detach the seal ring, and the shaft seal device and the shaft seal device. The seal ring can be easily attached / detached even if the space with the structure supporting the bearing, for example, the bearing unit is small.

[Second Embodiment]
A shaft seal device for a rotating shaft according to a second embodiment of the present invention will be described below with reference to FIGS. The shaft seal members of the rotary shafts according to the first and second embodiments are the same except that the configurations of the two-part seal rings 114 and 113 that are shaft seal members are different. Therefore, the configuration of the two-divided seal ring 113 will be mainly described below. Further, the components and effects of the shaft sealing device of the rotating shaft according to the second embodiment that are not particularly specified are the same as those of the shaft sealing device of the rotating shaft according to the first embodiment.

  FIG. 8A is a plan view of the two-divided seal ring 114 disposed on the right side of the rotating shaft 12 according to the second embodiment of the present invention, and FIG. 8B is a two-divided type. FIG. 8C is a front view of the half member 114b of the seal ring 114, FIG. 8C is an enlarged schematic view schematically showing a part indicated by an arrow VIIIc in FIG. 8B, and FIG. FIG. 9B is a plan view of the two-divided seal ring 113 arranged on the left side of the rotating shaft 12 according to the second embodiment of the invention, and FIG. FIG. 9C is a front view, and FIG. 9C is an enlarged schematic view schematically showing a part indicated by an arrow IXc in FIG. 9B. 10A is a schematic plan view of the horizontal mixer 1, FIG. 10B is a schematic partially broken front view of the horizontal mixer 1 shown in FIG. 10A, and FIG. FIG. 11 is a schematic side view of the horizontal mixer 1 shown in FIG. Note that the configuration of the horizontal mixer 1 shown in FIGS. 10A to 10C is the same as that of the horizontal mixer 1 shown in FIG.

  The two-part seal ring 114 shown in FIGS. 8A and 8B is mounted on the right side of the rotating shaft 12 of the horizontal mixer 1 shown in FIG. 10 and is shown in FIGS. 9A and 9B. The two-divided seal ring 113 is mounted on the right side of the rotating shaft 12 of the horizontal mixer 1 shown in FIG. Therefore, the configuration of the two-part seal ring 114 shown in FIGS. 8A and 8B will be described. In addition, the through-hole 114c shown in FIG.8 (b) and the through-hole 114c shown by Fig.8 (a) are shown in the aspect from which a position differs regarding the center axis line X direction. FIG. 8B is intended to clearly show the distance from the outer circumferential arc surface 116a to the through hole 114c.

  The two-divided seal ring 114 is a cylindrical member, and is a left half that is symmetrical with respect to an imaginary plane passing through the center axis X passing through the center thereof (except for a sealing groove 116c described later). The member 114a and the right half member 114b are configured. The half member 114 b includes a base portion 116 having a sealing groove 116 c that is a sealing groove, and a flange portion 117 that extends to an end portion of the base portion 116. The base 116 has an outer peripheral arc surface 116a having a predetermined dimension, and the right end in FIG. 8B has an end surface 116b having a smaller radius of curvature than the outer peripheral arc surface 116a. Further, a flange portion 117 is provided on the left side of the outer circumferential arc surface 116a in FIG. The flange portion 117 is provided with a plurality of through-holes 114c extending in parallel with the direction of the rotation axis O and penetrating therethrough. In the present embodiment, three circular holes 114c are provided, but the shape and dimensions can be changed as appropriate.

  Further, a spiral sealing groove 116 c is formed on the inner peripheral circular arc surface of the base 116. As shown in FIG. 8C, the sealing groove 116c includes a recess 116d having a predetermined radius of curvature, and a recess 116d extending in parallel with the direction of the rotation axis O and having a predetermined radius of curvature, and adjacent to the recess 116d. And a top portion 116e connecting the two.

  On the other hand, the half member 114a of the two-divided seal ring 114 shown on the left side of FIG. 8A has a shape that is line-symmetric with respect to the half member 114b along the central axis X except for the sealing groove 116c. That is, when the half member 114a and the half member 114b are engaged as shown in FIG. 8A, the sealing groove 116c of the half member 114a and the sealing groove 116c of the half member 114b are continuous, and a series of spiral shapes. Configure. The sealing grooves 116c of the half members 114a and 114b continuously extend on the inner peripheral surface of the base portion 116 from the flange portion 117 side to the right in the direction of the rotation axis O in FIG. 8B. Furthermore, the concave portion 116d of the sealing groove 116c has a spiral shape that constitutes a right female screw that extends clockwise (clockwise).

  On the other hand, the half members 113a and 113b of the two-part seal ring 113 shown in FIGS. 9A to 9C are the half members 114a of the two-part seal ring 114 shown in FIGS. , 114 b have the same dimensions and the same shape except that a sealing groove 115 c different from the shape of the sealing groove 116 c of 114 b is provided. When the half members 113a and 113b are engaged as shown in FIG. 9A, the sealing groove 115c of the half member 113a and the sealing groove 115c of the half member 113b are continuous to form a series of spiral shapes. Further, the concave portion 115d of the sealing groove 115c has a spiral shape that constitutes a left female screw that extends counterclockwise (counterclockwise).

  The two-divided seal ring 113 includes a through hole 113c, a base 115, an end surface 115b, a sealing groove 115c, a recess 115d, a top 115e, and a flange 117.

  On the other hand, the half member 113a of the two-divided seal ring 113 shown on the left side of FIG. 9A has a symmetrical shape with respect to the half member 113b along the central axis X except for the sealing groove 115c. That is, in a state where the half member 113a and the half member 113b are engaged as shown in FIG. 9A, the sealing groove 115c of the half member 113a and the sealing groove 115c of the half member 113b are continuous, and a series of spiral shapes. Configure. The sealing groove 115c of the half members 113a and 113b continuously extends on the inner peripheral surface of the base portion 115 from the flange portion 117 side to the right in the direction of the rotation axis O in FIG. 9B. Further, the recess 115d of the blocking groove 115c has a spiral shape that extends counterclockwise (counterclockwise) and forms a left female screw.

  As described above, the sealing groove 115c of the two-divided seal ring 113 and the sealing groove 116c of the two-divided seal ring 114 disposed around the rotary shaft 12 (see FIG. 1) have spiral shapes having different directions. Is formed. In the present embodiment, the shape of the sealing grooves 115c and 116c of the two-part seal rings 114 and 113 is set in a state where the rotating shaft 12 shown in FIG. 10 rotates in the arrow T direction (clockwise). Therefore, when the rotating shaft 12 rotates in the direction opposite to the arrow T direction, the blocking groove 115c has a spiral shape of a right female screw, and the sealing groove 116c has a spiral shape of a left female screw. By making the sealing grooves 115c and 116c into a spiral shape in this way, the movement of the container such as bread dough that adheres to the outer peripheral surface of the rotating shaft 12 is moved by the two-part seal rings 114 and 113 having the sealing grooves 115c and 116c. Locked.

  As a result of diligent research, the inventors have sought to rotate the rotary shaft 12 of the horizontal mixer 1 in order to knead the dough. It has been found that there is a tendency to flow out of the horizontal mixer 1 through a minute gap between the horizontal mixer 12 and the casing 11 of the horizontal mixer 1. This embodiment uses the principle of an Archimedian screw to prevent the dough from flowing out.

  Specifically, the rotation direction of the rotary shaft 12 (see FIG. 1) (arrow T in FIG. 10C) and the direction in which the spiral of the spiral blocking groove 116c is wound (that is, the spiral direction) are the same. I'm doing it. Therefore, from the inside of the container 10, the outer peripheral surface 12a of the rotating shaft 12 (see FIG. 1), the inner peripheral surface 11a of the casing 11 (see FIG. 1), or the space between the outer peripheral surface 12a and the inner peripheral surface 11a. By applying a force in the opposite direction (inner direction of the casing 11) to the stored item 10 flowing out, a force for moving the stored item 10 into the casing 11 is applied. As a result, even if the container 10 moves to the outside of the casing 11 through a minute space between the rotating shaft 12 and the casing 11, the horizontal mixer 1 is caused by the force that the sealing grooves 116c and 115c apply to the container. Outflow to the outside of the house.

  Further, the sealing groove 115c of the two-part seal ring 113 arranged on the left side of the rotary shaft 12 (left side of FIG. 10B) is a rotation direction (see FIG. 10) of the rotary shaft 12 (see FIG. 1). The arrow T) in c) coincides with the spiral direction of the spiral blocking groove 115c. That is, the two-divided seal ring 113 has a sealing groove 115c extending in the spiral direction (left direction) opposite to the spiral direction of the sealing groove 116c of the two-divided seal ring 114 arranged on the right side.

  Similarly to the first embodiment, the two-divided seal rings 114 and 113 having the above-described configuration are detachably attached to the fixing pin 30 fixed to the casing 11 through the through hole 113c.

  Furthermore, on the two-divided seal rings 114 and 113, the diameter parts of the two-divided presser plates 15a and 15b shown in FIG. 5 are inserted into the fixing pin 30 while being engaged with each other. As described in connection with the first embodiment, the holding plates 15a and 15b are shown in FIGS. 5 and 7 in a state where the diameter portions are separated from each other. As shown in FIG. 6, the straight portions are engaged with each other and assembled to form a circle.

  As in the first embodiment, in the above assembling process, the joints of the two-part seal rings 114 and 113 are arranged in a positional relationship extending in a direction inclined with respect to the vertical direction (center axis X direction). . In addition, the inventors conducted a performance test, and compared with the two-split seal rings 13a and 13b of the first embodiment, leakage of the contents by the two-split seal rings 114 and 113 of the second embodiment. We have acquired knowledge that the prevention accuracy will increase. Of course, it is also possible to adopt a configuration in which the seam extends in the vertical direction, similarly to the two-part seal ring 13a, 13b of the first embodiment, depending on the characteristics of the contents.

  Further, the mounting state of the two-divided seal rings 114 and 113 and the two-divided retainer plates 15a and 15b is the same as that of the first embodiment in that the central axis X of the two-divided seal rings 114 and 113 that are engaged with each other. And the joints at the center of the two-part presser plates 15a and 15b fixed to each other extend at positions shifted from each other. Of course, as in the first embodiment, according to the characteristics of the contents, the joint of the two-part seal ring 114, 113 and the joint of the two-part presser plates 15a, 15b are matched. It is also possible to adopt.

  The procedure for removing the two-part seal rings 114 and 113 from the rotary shaft 12 when the horizontal mixer 1 is stopped in order to clean or replace the two-part seal rings 114 and 113 is the same as in the first embodiment. Omit.

  In the first embodiment, between the inner peripheral surface 13d of the two-divided seal rings 13a and 13b provided with the groove 14 and the outer peripheral surface 12a of the rotary shaft 12, and in the second embodiment, the sealing is performed. A gap is provided between the top portions 115e and 116e of the grooves 115c and 116c and the outer peripheral surface 12a of the rotary shaft 12, and the gap size is the same as that of the rotary shaft 12, the seal ring, and the agitated contents. It is adjusted appropriately according to the characteristics.

  In the first and second embodiments, a sealing groove constituted by a single thread is employed, but the present invention is not limited to the sealing groove of the configuration. The sealing groove can be composed of a single thread or a multi-thread female thread, or can be composed of female threads of various sizes. In the above embodiment, a two-part seal ring having a female threaded sealing groove is used. However, the casing 11 has a single thread or multiple female threaded sealing groove in the hole through which the rotary shaft 12 passes. It is also possible to form a structure. Further, by providing the outer peripheral surface of the rotating shaft 12 with a spiral convex portion having a single or multiple male thread shape complementary to the screw shape as described above, the outflow of the contents is prevented in the same manner as in the above embodiment. can do. Furthermore, in this embodiment, a seal ring or presser plate composed of two half members is employed, but the present invention is composed of a single seal ring or presser plate or three or more half members. It is also possible to employ a seal ring or a holding plate.

  In the above-described configuration in which the seal ring is attached to the rotating shaft and the above-described configuration in which the convex portion is provided on the outer peripheral surface of the rotating shaft 12, a gap is provided between the sealing and the inner peripheral surface of the casing. A gap is provided between the convex portion and the inner peripheral surface of the casing, and the size of the gap can be appropriately changed as described in the paragraph [0052].

  In the first and second embodiments, a horizontal mixer for kneading bread dough is used, but the present invention is not limited to a horizontal mixer used for dough, but a vertical mixer for kneading food or a mixture of food and liquid. Needless to say, the present invention can be applied to various mixers used for stirring substances such as spiral mixers and horizontal mixers.

  In addition, it goes without saying that the present invention is not limited to the above-described embodiments, as long as it is based on the technical idea of the present invention.

1 horizontal mixer 10 mixture (containment)
11 Mixing tank wall (casing) 12 Rotating shaft
13a, 13b 2 split seal ring 13c through hole 13f through hole 14 seal groove 15a, 15b 2 split presser plate 15c through hole 15d handle 17, 18 stirring rod 19 bearing 20 driven shaft side bearing unit 21 frame 22 catch Clip 22a engagement part component 22b clip component 30 fixing pin 113, 114 Two-part seal ring
113a, 113b, 114a, 114b Half member 113c, 114c Through hole 115, 116 Base 115c, 116c Sealing groove 115d, 116d Recess 115e, 116e Top 117 Flange

Claims (10)

  A casing having a contained item therein, a rotating shaft provided through the casing to be driven to rotate, and a rotating shaft that protrudes through the outside of the casing and is disposed around the outer periphery. A two-part seal ring that is freely inserted, a seal groove that is formed on the inner peripheral portion of the seal ring and faces the rotating shaft, and a two-part that is detachably supported on the outer end of the seal ring A shaft seal device for a rotating shaft, comprising a mold retainer plate.   The shaft sealing device for a rotary shaft according to claim 1, wherein the means for attaching and detaching the two-part seal ring and the two-part retainer plate is implemented through a plurality of fixing pins fixed to the casing.   The shaft seal device for a rotating shaft according to claim 1 or 2, wherein the joints of the respective divided portions of the seal ring and the presser plate are arranged on non-collinear lines.   A casing having a contained item therein, a rotating shaft provided through the casing to be driven to rotate, and a rotating shaft that protrudes through the outside of the casing and is disposed around the outer periphery. A two-part seal ring that is freely inserted, a seal groove that is formed on the inner peripheral portion of the seal ring and faces the rotating shaft, and a two-part that is detachably supported on the outer end of the seal ring A horizontal mixer comprising: a shaft sealing device for a rotating shaft including a mold holding plate; a bearing unit that rotatably supports the rotating shaft in the casing; and a stirring means provided on the rotating shaft.   5. The horizontal mixer according to claim 4, wherein the means for attaching and detaching the two-divided seal ring and the two-divided retainer plate is a shaft seal device for the rotating shaft that is implemented via a plurality of fixing pins fixed to the casing.   6. The horizontal mixer according to claim 4 or 5, wherein the joint of each divided portion of the two-divided seal ring and the two-divided presser plate is a shaft seal device for a rotating shaft arranged on a non-colinear line. A shaft sealing member for restricting movement of the stored article between the rotating shaft and the casing through which the rotating shaft passes;
A seal ring member disposed on one of the rotating shaft and the casing;
A shaft sealing member provided with a spiral groove on one of the inner surface and the outer surface of the seal ring member facing one of the inner surface and the outer surface of the casing and the other inner surface and outer surface of the casing.   The shaft sealing member according to claim 7, wherein a spiral direction of the groove coincides with a direction in which the rotation shaft rotates.   The shaft seal member according to claim 7, further comprising a plurality of the seal ring members, wherein the plurality of seal ring members are detachably mounted along a central axis of the rotation shaft. A casing capable of accommodating the contents;
A rotating shaft that is rotatable in the casing and penetrates the casing;
An agitation member connected to the rotating shaft for agitating the contents;
A shaft sealing member according to claim 7.

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