JP3042470U - Mixing head - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a mixing head which can easily disassemble around a mixing chamber and can easily and safely perform a cleaning operation after use. SOLUTION: A locking pin 60 having a head whose outer diameter is larger than that of a shaft is fixed to a mixing head main body 56. At the position corresponding to the locking pin 60 of the holding portion 32,
Locking pin insertion hole 58 for inserting the locking pin 60
Is formed. Further, a locking pin engaging hole 62 for engaging the head portion 60a of the locking pin 60 is formed in communication with the locking pin insertion hole 58.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a mixing head, and more particularly to a mixing head used for mixing an isocyanate compound and a polyol to obtain a urethane molded product and injecting the mixture into, for example, an open mold.

[0002]

[Prior art]

 As a conventional mixing head which is the background of this invention, there is, for example, the one disclosed in JP-A-5-84435. In such a conventional mixing head, it is necessary to wash the inside of the mixing chamber in order to prevent the mixed material remaining after use from being cured in the mixing chamber. In this case, conventionally, by switching the flow passages and flowing the cleaning solvent and the pressurized air into the flow passages and the mixing chamber for the mixing material, the mixed liquid remaining in the mixing chamber is discharged from the discharge port of the mixing head. It was drained and the inside of the mixing chamber was washed.

[0003]

[Problems to be solved by the device]

 However, such a conventional cleaning method has a problem that the solvent and the mixed solution are scattered in the air and pollute the working environment. It is dangerous to work in an atmosphere contaminated with solvents. Therefore, in order to avoid this inconvenience, the periphery of the mixing chamber of the mixing head must be disassembled and cleaned separately by using a sealed cleaning device. However, in the conventional mixing head, it is relatively difficult to remove the member that holds the rotor, and it is difficult to clean that portion.

Therefore, a main object of the present invention is to provide a mixing head which can easily disassemble around a mixing chamber and can easily and safely perform a cleaning operation after use.

[0005]

[Means for Solving the Problems]

 The mixing head of the present invention has a mixing chamber for mixing a plurality of materials, a rotor for rotating in the mixing chamber to agitate the plurality of materials, a detachable holding of the rotor, and a detachable mixing chamber. The mixing head includes a holding portion which is held by the above to form the inner ceiling surface of the mixing chamber, and a locking means for locking the holding portion to the mixing head main body in an easily attachable / detachable manner. In the mixing head of this invention, since the holding portion is easily held by the locking means with respect to the main body of the mixing head, the holding portion can be easily removed.

The locking means is fixed to the mixing head body, and the head has at least a locking pin at a position corresponding to the locking pin having an outer diameter larger than that of the shaft and the locking pin of the holding portion. It has a larger inner diameter than the head of the pin, and has a locking pin insertion hole for inserting the locking pin, and the holding pin after inserting the locking pin into the locking pin insertion hole. Since the head of the locking pin is engaged by rotating it in one direction, it communicates with the locking pin insertion hole, and its minimum inner diameter is larger than the outer diameter of the shaft of the locking pin. It is preferable to include a locking pin engaging hole formed smaller than the outer diameter of the portion.

In this case, the locking pin is inserted into the locking pin insertion hole, and then the holding portion is rotated in one direction so that the head of the locking pin becomes the locking pin engaging hole. By attaching the holder, the holder can be easily attached to the mixing head body. When removing the holding part from the mixing head body, rotate the holding part in the opposite direction to release the engagement between the head of the locking pin and the locking pin engaging hole, and remove the locking pin. The holder can be easily removed from the mixing head body by pulling it out from the locking pin insertion hole.

Further, the mixing head main body includes an upper rotary shaft that is rotated by the driving means, and the holding unit is rotatably provided on the same axis as the upper rotary shaft, and the rotor is provided at the lower end thereof. Includes a lower rotary shaft that is detachably screwed, and the upper rotary shaft upper end is easily connected to the lower end of the upper rotary shaft in the axial direction, so that the upper rotary shaft and the lower rotary shaft are in the same direction. It is preferred that a connecting means is provided for rotation. In this case, the upper rotating shaft and the lower rotating shaft are connected by the connecting means to rotate in the same direction. When removing the holding part from the mixing head body, the lower rotary shaft is removed from the connecting means, and the upper rotary shaft and the lower rotary shaft are separated. With such a structure, it becomes easy to remove the holding portion from the mixing head body.

Further, it is preferable that the connecting means and the lower rotary shaft are formed so as to integrally rotate in the circumferential direction of the shaft when they are easily connected to each other in the axial direction. In this case, when the lower rotary shaft is fitted in the connecting means, both rotate integrally. At this time, since the connecting means and the upper rotary shaft are also fixed as described above, the upper rotary shaft and the lower rotary shaft eventually rotate together. Further, since the connection between the lower rotating shaft and the connecting means is easy, the holding portion can be easily removed from the mixing head main body.

Further, in the above-described mixing head, the mixing chamber has a cylindrical fastening seat portion that is formed to project outward from the outer peripheral wall of the mixing chamber and abuts on the holding portion, at a portion facing the holding portion. The holding part includes a tightening seat receiving part that is formed so as to cover the tightening seat part and has a male screw formed on the outer peripheral part thereof, and further includes a tightening seat receiving part for screwing the male screw on the inner peripheral part. The fastener includes a fastener having an internal thread and having an engaging portion for engaging a portion of the fastening seat portion projecting from the outer wall of the mixing chamber. It is preferable to hold the mixing chamber in the holding portion by screwing the female screw and the male screw while engaging the engaging portion with the protruding portion of the seat portion. In this case, the tightening seat part is brought into contact with the holding part, and the tightening seat receiving part is covered with the tightening seat part. Then, the female screw of the tightening tool and the male screw of the tightening seat receiving part are screwed while engaging the tightening tool arranged on the outer periphery of the mixing chamber with the protruding portion of the tightening seat. By doing so, the mixing chamber is easily held by the holding portion. On the contrary, the mixing chamber can be easily removed from the holding portion by eliminating the screwing between the fastening tool and the fastening seat receiving portion.

In addition, the upper rotary shaft, the lower rotary shaft, and the rotor are formed with through holes that linearly communicate with each other in the axial direction, and a heat medium for adjusting the temperature in the mixing chamber is rotatably provided inside the through hole. A passage is preferably formed for feeding into the inside. In this case, for example, a heat carrier for cooling can be fed into the rotating rotor through a passage that linearly connects the upper rotary shaft, the lower rotary shaft, and the rotor in the axial direction. Therefore, even if the rotor is rotating, the temperature inside the mixing chamber can be adjusted by cooling the inside of the mixing chamber, for example. In this case, a pipe member having an outer diameter smaller than the inner diameter is inserted into the through hole, the inner side of the pipe member is used as a passage for supplying or discharging the heat medium, and The outside is preferably used as a passage for discharging or supplying the heat medium. With this structure, the passage for supplying and discharging the heat medium can be installed in a smaller space.

[0012]

[Effect of the invention]

 According to the mixing head of the present invention, the mixing chamber and the rotor can be disassembled more easily than the conventional one, and the holding part including the lower rotary shaft can be easily removed, so that the cleaning head after use can be cleaned. Work can be performed easily and safely.

The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the embodiments of the invention with reference to the drawings.

[0014]

[Embodiment of the invention]

 FIG. 1 is an illustrative view showing the internal structure of an example of the mixing head of the present invention. FIG. 2 is a side view of the mixing head shown in FIG. FIG. 3 is a rear view showing an essential part of the mixing head shown in FIG.

The mixing head 10 includes a case 12 having a substantially cylindrical shape. Inside the case 12, a mixing chamber 14 for mixing the main component of urethane rubber and the curing agent is formed. This urethane rubber is used to form the cleaning blade of a copying machine. Further, the urethane rubber in this embodiment generates heat when the main agent and the curing agent are mixed, and the reaction rate thereof is relatively fast. Therefore, the heat exchange in the following explanation is performed by cooling. belongs to.

As shown in FIG. 7, the mixing chamber 14 is formed so as to extend in the vertical direction inside the case 12. FIG. 4 is an enlarged view of an essential part showing the periphery of the mixing chamber 14, and FIG. 5 is a sectional view taken along the line V-V. A discharge port 16 for the mixed liquid is formed at the lower end of the case 12 so as to communicate with the mixing chamber 14. In addition, as shown in FIG. 5, a substantially sealed hollow heat exchange chamber 18 as a third temperature adjusting means is formed around the outside of the case 12. A heat medium supply port 18 a for supplying a heat medium such as cooling water into the heat exchange chamber 18 is formed at the lower end of the heat exchange chamber 18. In addition, a heat medium discharge port 18b for discharging the cooling water in the heat exchange chamber 18 is formed at a position opposite to the heat medium supply port 18a at the lower end of the heat exchange chamber 18. The heat medium discharge port 18b extends into the vicinity of the upper end portion inside the heat exchange chamber 18 via a cylindrical tube member 18c. This is because the heat medium supplied from the heat medium supply port 18a fills the inside of the heat exchange chamber 18 and then discharges the amount that is about to overflow from the upper part. The heat medium flows around the mixing chamber 14. It should be noted that the description of this embodiment will be made based on the vertical direction in which the ejection port 16 of the mixing head 10 is the lower end and the rotary joint 80 described later is the upper end.

Inside the mixing chamber 14, a hollow substantially cylindrical stirring rotor 20 for mixing and stirring the materials is arranged. A spiral groove 20 a is formed on the outer wall surface of the stirring rotor 20 to facilitate stirring of the material. The shape of the outer wall surface is not limited to the spiral groove, and may be an uneven shape, and may be any shape as long as the material is easily stirred. Inside the stirring rotor 20, a substantially sealed cavity 22 is formed. The cavity 22 is for cooling the mixing chamber 14 from the inside of the stirring rotor 20 by filling the inside thereof with a heat medium such as cooling water and constantly flowing the heat medium.

A rotor shaft 24 is integrally formed with the stirring rotor 20 at the center of the upper end of the stirring rotor 20. As shown in FIG. 7, a vertical through hole 26 a is formed in the central portion of the rotor shaft 24 so as to communicate with the hollow portion 22 inside the stirring rotor 20. The pipe member 100 described later is inserted into the through hole 26a. The inside of the pipe member 100 serves as a first passage 102 for supplying the heat medium, and the outside of the pipe member 100 serves as a second passage 103 for discharging the heat medium. Further, on the outer peripheral portion of the upper end portion of the rotor shaft 24, a male screw 24a for screwing into a female screw 36a formed on the lower end inner portion of a lower rotating shaft 36 described later is formed. Further, an O-ring 25 is provided on the outer peripheral portion of the body of the rotor shaft 24 so as to seal the inner wall surface near the lower end of the lower rotary shaft 36, which will be described later, and prevent liquid leakage from the through hole 26a. To be

FIG. 6 is a cross-sectional view of the nozzle plate taken along the line VI-VI in FIG. FIG. 7 is an illustrative view showing a disassembled state of a main part of the mixing head shown in FIG. 1. On the case 12, for example, a block-shaped nozzle plate 28 having an octagonal plane is arranged. The lower surface of the nozzle plate 28 serves as the inner ceiling surface of the mixing chamber 14. Further, as shown in FIG. 7, a lower rotary shaft holding unit 30 having a convex shape on the front surface is arranged on the nozzle plate 28. The lower rotary shaft holding unit 30 is for rotatably holding a lower rotary shaft 36, which will be described later, and also constitutes the lower end of the mixing head body. The nozzle plate 28 and the lower rotary shaft holding unit 30 are integrally fixed to each other, and the holding portion 32 of this embodiment is constituted by both.

The central portion of the holding portion 32 is formed hollow, and the mechanical seal 34 is housed inside the lower end thereof. The mechanical seal 34 seals the mixing chamber 14 while rotating with the lower rotary shaft 36 and the rotor shaft 24 around the rotating lower rotary shaft 36 and the rotor shaft 24, and from the lower mixing chamber 14 to the rotor shaft 24 and the rotor shaft 24. This is for preventing the liquid mixture from leaking upward through the periphery of the lower rotary shaft 36. A liquid such as DOP (dioctyl phthalate) is constantly flowed around the mechanical seal 34. This is to serve as a heat medium for cooling the frictional heat generated in the mechanical seal 34 and to lubricate the mechanical seal 34.

FIG. 7 is an illustrative view showing a disassembled state of a main part of the mixing head shown in FIG. The lower end of the lower rotary shaft 36 is inserted through the center of the mechanical seal 34. The lower rotary shaft 36 is formed to extend in the vertical direction, and is rotatably held by the lower rotary shaft holding unit 30 via a bearing 38. An oil seal 40 is provided around the lower rotary shaft 36 between the mechanical seal 34 and the bearing 38. The oil seal 40 is for preventing a heat medium such as DOP flowing around the mechanical seal 34 from leaking to the bearing 38.

Further, a through hole 26b is formed inside the lower rotary shaft 36 so as to extend in a straight line from the upper end to the lower end along the central axis. The through hole 26b linearly communicates with the through hole 26a in the rotor shaft 24. A pipe member 100 described later is inserted into the inside of the pipe member 100, and the inside of the pipe member 100 serves as a first passage 102 for supplying the heat medium and the outside of the pipe member 100 serves as a second passage for discharging the heat medium. It becomes 103.

Nozzles 42 a and 42 b are fixed to both sides of the nozzle plate 28 with the mechanical seal 34 in the center portion therebetween. The nozzle 42a is for feeding the main agent (hereinafter referred to as liquid A) into the mixing chamber 14, and the nozzle 42b is for feeding the curing agent (hereinafter referred to as liquid B) into the mixing chamber 14. Further, as shown in FIG. 7, the mixed material passages 44a and 44b respectively communicating with the nozzles 42a and 42b face each other with the central portion of the nozzle plate 28 interposed therebetween, and the nozzle plate 28 and the lower rotary shaft holding unit. It is formed by obliquely penetrating 30. The ends of the mixed material passages 44a, 44b opposite to the nozzles 42a, 42b are communicated with the passages formed in the upper mixing head body 56, and the passages for mixing the mixed material are respectively provided in the passages. Liquid valves 45a and 45b are provided. These mixed liquid valves 45a and 45b are simultaneously opened and closed by a single cylinder 47 provided in front of the mixing head 10 as shown in FIG. Further, cleaning liquid valves 48a and 48b for cleaning liquid are provided near the mixed liquid valves 45a and 45b. The cleaning liquid valves 48a and 48b are opened and closed by cylinders 49a and 49b, respectively. The cylinders 49a and 49b are provided on both sides of the mixing head 10, as shown in FIG.

As shown in FIG. 6 (A), the nozzle plate 28 is surrounded by the central mechanical seal 34 and the mixed material passages 44 a, 44 b so as to serve as a second temperature adjusting means. A tubular heat medium passage 46 is formed. In this embodiment, cooling water is caused to flow through the heat medium passage 46 as a heat medium. Therefore, the outside of the mixed material passages 44a and 44b is cooled by this cooling water, and the inside is cooled by the DOP flowing for cooling the mechanical seal 34. As a result, it is possible to prevent the heat generation of the mechanical seal 34 from adversely affecting the mixed material.

Both ends of the heat medium passage 46 are extended upward from the nozzle plate 28 and open to the rear surface of the lower rotary shaft holding unit 30 as shown in FIG. 3, one of which is a cooling water supply port 46 a. And the other is used as the discharge port 46b. A DOP supply port 35a and a DOP supply port 35b for cooling the mechanical seal 34 are formed in the vicinity of the cooling water supply port 46a and the discharge port 46b.

Next, the connection state between the case 12 that is the outer shell of the mixing chamber 14 and the holding portion 32 will be described. The case 12 includes a cylindrical fastening seat portion 50 that is formed so as to project outward from the outer peripheral wall of the case 12 and abuts the nozzle plate 32 at the lower end of the holding portion 32 at a portion facing the nozzle plate 32. . The outer peripheral wall of the case 12 is also the outer peripheral wall of the mixing chamber 14, in other words. On the other hand, on the surface of the nozzle plate 32 facing the case 12, an annular fastening seat receiving portion 52 is formed so as to cover the side wall of the fastening seat portion 50. A male screw 52a is formed on the side wall portion of the tightening seat receiving portion 52 that does not face the tightening seat portion 50, that is, on the outer peripheral portion. Further, around the case 12 which is the outer shell of the mixing chamber 14, a substantially annular fastening tool 54 is arranged. A female screw 54a for screwing the male screw 52a is formed on the inner peripheral portion of the fastener 54. Further, the fastener 54 has an engaging portion 54b for contacting the lower surface of the portion of the fastening seat portion 50 protruding from the outer wall of the mixing chamber 14. The engaging portion 54 is formed so as to protrude inward from the inner peripheral wall of the fastener 54. By rotating the fastener 54 while bringing the engaging portion 54b into contact with the tightening seat portion 50 and screwing the female media 54a and the male screw 52a into each other, the engaging portion 54b becomes the tightening seat portion 50. By engaging, the tightening seat portion 50 can be easily fixed to the tightening seat receiving portion 52 as shown in FIGS. 1 and 4. On the other hand, when disassembling, the fastener 54 is rotated in the opposite direction to release the screw engagement between the female media 54a and the male screw 52a, and as shown in FIG. 12 and the holding part 32 can be easily separated.

Next, the connection state of the holding portion 32 and the mixing head body 56 will be described. For example, four locking pins 60 are fixed to the lower surface of the mixing head body 56. The locking pin 60 has a substantially T-shape as shown in FIG. 7, and its head portion 60a has a larger outer diameter than the shaft portion 60b. On the other hand, in the lower rotary shaft holding unit 30 of the holding portion 32, as shown in FIG. 6, four corner portions are respectively penetrated in the thickness direction, and locking pin insertion holes 58 are formed. These locking pin insertion holes 58 are formed so as to correspond to the positions of the locking pins 60. The locking pin insertion hole 58 is for inserting the locking pin 60, and the inner diameter thereof is formed larger than the maximum outer diameter of the head 60 a of the locking pin 60. Further, an elongated pin engaging hole 62 for engaging with the head 60a of the engaging pin 60 is formed in communication with the engaging pin insertion hole 58. The minimum inner diameter of the locking pin engaging hole 62 is formed to be larger than the outer diameter of the shaft portion of the locking pin 60 and smaller than the outer diameter of the head portion 60a. Moreover, these locking pin engaging holes 62 are formed so as to extend in the counterclockwise direction in FIG. 6 from the engaging pin insertion holes 58. Accordingly, the holding portion 32 is brought close to the lower surface of the mixing head body 56, the locking pin 60 is inserted into the locking pin insertion hole 58, and then the holding portion 32 is rotated counterclockwise. Thus, as shown in FIG. 6A, the holding portion 32 is attached to the mixing head body 56. At the time of removal, the holding portion 32 can be removed from the mixing head body 56 by rotating the holding portion 32 in the clockwise direction as shown in FIG. 6 (B). Therefore, in this embodiment, the locking pin 60, the locking pin insertion hole 58, and the locking pin engaging hole 62 lock the holding portion 32 to the mixing head main body 56 so that it can be easily attached and detached. Functioning as a locking means of the.

Inside the mixing head body 56, as shown in FIG. 1, an upper rotary shaft 64 is arranged. The upper rotary shaft 64 is rotatably held near the upper end and the lower end thereof via bearings 66. A substantially cylindrical coupling tool 68 is fixed to the lower end of the upper rotary shaft 64 as a coupling means. An O-ring 70 is fixed to the lower end of the upper rotary shaft 64 at the peripheral portion of the body to prevent liquid from leaking from the connector 68. Further, inside the upper rotary shaft 64, a through hole 26c penetrating in a straight line from the upper end to the lower end along the central axis is formed. The through hole 26c is in linear communication with the through hole 26a in the rotor shaft 24 and the through hole 26b in the lower rotary shaft 36 described above. Then, a pipe member 100 described later is linearly inserted therein, the inside of the pipe member 100 serves as a first passage 102 for supplying the heat medium, and the outside of the pipe member 100 forms a first passage for discharging the heat medium. It becomes the passage 103 of 2.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. The upper end of the lower rotary shaft 36 is inserted into the lower half of the connector 68 so as to be freely inserted and removed in the longitudinal direction. By pulling out the holding part 32 together with the lower rotary shaft 36, the holding part 32 and the mixing head main body 56 can be easily separated as shown in FIG. Further, an O-ring 72 as a sealing means is fixed near the upper end of the lower rotary shaft 36 through the upper end of the lower rotary shaft 36 as a sealing means for preventing liquid leakage from the connector 68. Further, a protrusion 36b as shown in FIG. 8 is formed on the upper periphery of the lower rotary shaft 36, and the protrusion 36b fits into a recess 68a formed on the inner periphery of the connector 68. Is formed in. Therefore, when the lower rotating shaft 36 is inserted into the connecting member 68, the lower rotating shaft 36 rotates integrally with the connecting member 68 in the same axial circumferential direction.

As shown in FIG. 1, a fitting portion 64 a for inserting the stopper 74 is formed between the two bearings 66 of the upper rotary shaft 64. The stopper 74 is for fixing the stirring rotor 20 so that the shaft does not rotate when the stirring rotor 20 is removed from the lower rotation shaft 36. The stopper 74 is inserted through the side wall of the mixing head main body 56 and is formed so as to be displaceable in the direction of the upper rotary shaft 64. A sensor 76 for detecting the number of rotations of the shaft is attached to the side wall of the mixing head main body 56 at a position facing the stopper 74. The sensor 76 detects the number of rotations of the shaft by detecting the fitting portion 64a of the upper rotation shaft 64.

The upper end of the upper rotary shaft 64 is provided so as to project above the mixing head body 56. The pulley 78 is fixed near the upper end of the pulley 78. A transmission belt (not shown) for transmitting the rotational force of the drive motor is wound around the pulley 78. By rotating the pulley 78, the upper rotary shaft 64 rotates.

FIG. 9 is an exploded view of the pipe connecting means of the mixing head shown in FIG. In this embodiment, the rotary joint 80 is used as the first and second pipe connecting means. The rotary joint 80 is fixed to the upper end of the upper rotary shaft 64. An O-ring 64b for preventing liquid leakage from the rotary joint 80 is fixed to the body peripheral portion near the upper end of the upper rotary shaft 64. The rotary joint 80 includes a lower flange member 82 having a substantially cylindrical shape. The lower flange member 82 is attached so as to cover the upper end portion of the upper rotary shaft 64. The lower flange member 82 and the upper rotary shaft 64 are fixed to each other, for example, by tightening the fixing screws 84 from the side. Inside the lower flange member 82, a through hole 26d is formed in communication with the through hole 26c in the upper rotary shaft 64 described above. Further, the lower flange member 82 has a lower flange 82a that is formed in a disk-like shape.

On the other hand, the upper flange member 88 is arranged above the lower flange member 82. The lower flange member 82 and the upper flange member 88 are the second pipe joint means of this embodiment. The upper flange member 88 has an upper flange 88a that is formed in a disk shape. The upper flange 88a and the lower flange 82a are provided with a plurality of communicating bolt holes 90. By overlapping the upper flange 88a and the lower flange 82a, inserting a bolt into the bolt hole 90 and screwing a nut, the upper flange member 88 and the lower flange member 82 are integrally connected. In this case, the upper flange member 88 is formed with a convex portion 88b protruding toward the lower flange member 82, and the lower flange member 82 is formed with a concave portion 82b for fitting the convex portion 88b. When both are integrally connected, the convex portion 88b and the concave portion 82b are fitted together. Further, at this time, an O-ring 88c is also fixed to the circumferential portion of the convex portion 88b in order to prevent liquid leakage between the both.

The upper flange member 88 has a through hole 26e formed therein so as to communicate with the above-described through hole 26d. Further, the upper flange member 88 is rotatably held inside the joint main body 92 as the first pipe joint means of this embodiment via the bearing 94. That is, the upper flange member 88 and the lower flange member 82 serve as the second pipe joint means in this embodiment. The joint body 92 has a supply port 96 for supplying cooling water as a heat medium from the outside and a discharge port 98 for discharging the cooling water to the outside. The supply port 96 and the discharge port 98 are formed in the joint main body 92 so as to be sealed and isolated from each other in order to prevent the heat medium from mixing with each other.

The pipe member 100 communicates with the supply port 96. The outer diameter of the pipe member 100 is such that when the pipe member 100 is inserted into the through holes 26a, 26b, 26c, 26d, and 26e, a passage for cooling water is provided between the inner wall of the through holes 26a to 26e and the outer wall of the pipe member 100. Therefore, the inner diameters of the through holes 26a to 26e are smaller than necessary. Then, the inside of the pipe member 100 functions as the first passage 102 of this embodiment. The first passage 102 of this embodiment is a passage for supplying cooling water. The vicinity of the upper end of the pipe member 100 is rotatably held by the joint body 92 via the bearing 104. The circumference of the pipe member 100 near the bearing 104 is rotatably sealed by a seal member 116 such as a mechanical seal. Further, as shown in FIGS. 9 and 10, the pipe member 100 is integrally fixed to the upper flange member 88 via the connector 106. Therefore, the pipe member 100 rotates integrally with the upper flange member 88. The upper flange member 88 is integrally connected to the lower flange member 82, rotates integrally with the upper rotary shaft 64, and the lower rotary shaft 36 also rotates integrally with the upper rotary shaft 64 via the connector 68. That is, the pipe member 100 of this embodiment rotates in the same direction at the same time as the rotation shafts 64 and 36. Further, as shown in FIGS. 9 and 10, the pipe member 100 has a narrow pipe diameter in the vicinity of the connector 106 being fixed. This is a thin tube because it cannot be inserted into the lower rotary shafts 64 and 36 if the tube diameter is still thick.

Further, the lower end portion of the pipe member 100 extends downward in the through holes 26a to 26e and extends into the stirring rotor 20 as shown in FIGS. Therefore, the inside of the pipe member 100 serves as the first passage 102 for supplying cooling water, and the outside of the pipe member 100 serves as the second passage 103 for discharging cooling water, as shown in FIG. The second passage 103 outside the pipe member 100 continuously extends from the inside of the stirring rotor 20 to the discharge port 98. The first passage 102 and the second passage 103 are arranged concentrically so as to extend coaxially with the central axes of the rotary shafts 64 and 36.

An annular seat ring 108 for sealing the rotating portion is in contact with the upper end of the pipe member 100, and a cylindrical seal ring 110 is in contact with the seat ring 108. . The seal ring 110, together with the seat ring 108, is pressed against the upper end of the pipe member 100 by the spring 112. Further, the periphery of the upper end of the pipe member 100 is rotatably held by the joint body 92 while being sealed so as to prevent water leakage.

In the mixing head 10, the supply port 96, the first passage 102, the second passage 103, the cavity 22 and the discharge port 98 constitute a temperature adjusting means. The cooling water is supplied to the supply port 96 from an external water supply device (not shown). The supplied cooling water flows from the upper part to the lower part in the first passage 102 and is sent to the cavity 22 in the stirring rotor 20 to cool the mixing chamber 14 from the rotating stirring rotor 20. It Then, the heat-exchanged cooling water flows from the cavity 22 into the second passage 103 from the lower side to the upper side, and is discharged from the discharge port 98. Since the stirring rotor 20 is arranged in the mixing chamber 14 and is rotating, the inside of the mixing chamber 14 can be efficiently cooled. Since the first passage 102 and the second passage 103 communicate with the hollow portion 22 inside the stirring rotor 14 through the inside of the rotating shafts 36 and 64, respectively, the rotating shafts 36 and 64 or the stirring rotor 20 are connected. The cooling water can be fed or discharged into the rotating stirring rotor 20 without hindering the rotation of the rotating rotor.

Further, in the mixing head 10 of this embodiment, the central axes of the rotary shafts 36 and 64, the first passage 102 and the second passage 103 are all the same, and the rotary shafts 36 and 64 rotate. Also, since the positions of the central axes of the first passage 102 and the second passage 103 do not change, it is easy to feed or discharge the cooling water.

Further, in this mixing head 10, the joint main body 92 having the supply port 96 and the discharge port 98 is fixed, and the first passage 102 and the second passage 103 extending downward from the inside thereof are It is rotatably provided together with the rotary shafts 36 and 64. Therefore, it is easy to send or discharge the cooling water from the fixed external device into the rotating stirring rotor 20.

Further, the heat generation of the mechanical seal 34 can be cooled by the heat medium passage 46 provided as the second temperature adjusting means provided in the nozzle plate 28 constituting the inner ceiling surface of the mixing chamber 14. Therefore, heat transfer from the mechanical seal 34 to the mixing chamber 14 via the nozzle plate 28 is prevented, and the temperature of the mixing chamber 14 can be adjusted from the inner ceiling surface, so that the temperature inside the mixing chamber 14 is maintained at a predetermined temperature. Will be easier. In addition, since the heat medium passage 46 is disposed outside the mixed material passages 44a and 44b, the temperature of the materials to be mixed that are delivered into the mixing chamber 14 can be adjusted in advance.

Furthermore, since the temperature of the mixing chamber 14 is adjusted from the outer periphery thereof by the heat exchange chamber 18 as the third temperature adjusting means, the mixing chamber 14 can be sufficiently cooled from the inside and the outside. .

If a heating medium having a high temperature is used, it is possible to heat the inside of the mixing chamber 14 from the stirring rotor 20 as required.

As described above, according to the mixing head 10, the inside of the mixing chamber 14 can be sufficiently cooled. Therefore, even when using a material that has a relatively high reaction rate and generates heat during the reaction, it is possible to cool the heat generation, suppress inconvenience such as gelation, and enable continuous discharge work for a long time. Become.

In addition, in the mixing head 10, the retaining pin 32 as the retaining means, the retaining pin inserting hole 58, and the retaining pin engaging hole 62 cooperate with each other, so that the holding portion 32 is formed. It is held on the mixing head main body 56 with ease. That is, the retaining pin 32 is rotated in one direction after the retaining pin 60 is inserted into the retaining pin insertion hole 58, and the head portion 60 a of the retaining pin 60 is inserted into the retaining pin engaging hole 62. The holding part 32 can be easily attached to the mixing head body 56 by engaging. On the other hand, when removing the holding part 32 from the mixing head body 56, the holding part 32 is rotated in the opposite direction so that the head 60a of the locking pin 60 and the locking pin engaging hole 62 are engaged with each other. By releasing and pulling out the locking pin 60 from the locking pin insertion hole 58, the holder 32 can be easily removed from the mixing head body 56. Therefore, in the mixing head 10, the holding portion 32 can be easily attached and detached. In order to facilitate the attachment / detachment of the holding portion 32 to / from the mixing head main body 56, a handle for allowing the operator to grasp and work is provided so as to project laterally from the side surface of the holding portion 32. Good.

Further, in the mixing head 10 of this embodiment, when the lower rotary shaft 36 is fitted in the connecting member 68, both rotate integrally. At this time, since the connecting member 68 and the upper rotary shaft 64 are also fixed to each other, the upper rotary shaft 64 and the lower rotary shaft 36 eventually rotate together. Further, since the connection between the lower rotary shaft 36 and the connector 68 is easy as described above, the holding portion 32 including the lower rotary shaft 36 can be easily removed from the mixing head main body 56.

Further, in the mixing head 10, the fastening seat portion 50 is brought into contact with the lower surface of the holding portion 32, and the fastening seat receiving portion 52 is covered on the side surface of the fastening seat portion 50. Then, while engaging the engaging portion 54b of the fastening tool 54 arranged on the outer periphery of the mixing chamber 14 with the protruding portion of the fastening seat section 50, the female screw 54a of the fastening tool 54 and the fastening seat 54 are engaged. By screwing the male screw 52a of the receiving portion 52, the mixing chamber 14 is easily held by the holding portion 32. On the contrary, by removing the screwing between the fastening tool 54 and the fastening seat receiving portion 52, the mixing chamber 14 can be easily removed from the holding portion 32.

As described above, according to the mixing head 10, the mixing chamber 14 and the stirring rotor 20 can be disassembled more easily than the conventional one, and the holding portion 32 including the lower rotation shaft 36 is also included. As it can be easily removed, cleaning work after use can be performed easily and safely.

[Brief description of the drawings]

FIG. 1 is an illustrative view showing an internal structure of an example of a mixing head of the present invention.

FIG. 2 is a side view of the mixing head shown in FIG.

FIG. 3 is a rear view showing a main part of the miking head shown in FIG.

FIG. 4 is an enlarged view of a main part showing an enlarged periphery of a mixing chamber.

5 is a cross-sectional view taken along line VV shown in FIG.

6 is a cross-sectional view of the nozzle plate taken along line VI-VI in FIG.

FIG. 7 is an illustrative view showing a disassembled state of a main part of the mixing head shown in FIG. 1.

8 is a sectional view taken along line XIII-XIII in FIG.

9 is an illustrative view showing a pipe connecting means of the mixing head shown in FIG. 1 in an exploded manner.

10 is a schematic sectional view taken along line XX of FIG.

[Explanation of symbols]

 10 Mixing Head 12 Case 14 Mixing Chamber 16 Discharge Port 18 Heat Exchange Chamber 20 Stirring Port 22 Cavity 24 Rotor Shaft 26 Second Passage 28 Nozzle Plate 30 Lower Rotating Shaft Holding Unit 32 Holding Part 34 Mechanical Seal 36 Lower Rotating Shaft 38 Bearing 40 oil seal 42a, 42b nozzle 46 heat medium passage 50 tightening seat part 54 tightening tool 56 mixing head body 58 locking pin insertion hole 60 locking pin 62 locking pin engaging hole 64 upper rotary shaft 66 Bearing 68 Connector 78 Pulley 80 Rotary joint 96 Supply port 98 Discharge port 100 Pipe member 102 First passage 103 Second passage

[Procedure amendment]

[Submission date] May 29, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 6

[Correction method] Change

[Correction contents]

Claims (7)

[Utility model registration claims] 1. A mixing chamber for mixing a plurality of materials, a rotor for rotating in the mixing chamber to agitate the plurality of materials, the rotor being detachably held, and the mixing chamber A holding portion that is detachably held and that includes a surface that forms an inner ceiling surface of the mixing chamber when the mixing chamber is held, and for easily holding the holding portion with respect to the mixing head body. A mixing head including locking means. 2. The locking means is fixed to the mixing head main body, and a locking pin having a head portion having an outer diameter larger than that of a shaft portion, and a position corresponding to the locking pin of the holding portion, A locking pin insertion hole formed to have at least an inner diameter larger than that of the head portion of the locking pin, the locking pin insertion hole for inserting the locking pin, and the locking pin insertion hole for the locking Since the head portion of the locking pin is engaged by rotating the holding portion in one direction after inserting the pin, it is communicated with the locking pin insertion hole and its minimum inner diameter is The mixing head according to claim 1, further comprising: a locking pin engaging hole formed to have a diameter larger than an outer diameter of the shaft portion of the stop pin and smaller than an outer diameter of the head portion. 3. The mixing head body includes an upper rotary shaft that is rotated by driving means, and the holding unit is rotatably provided on the same axis as the upper rotary shaft, and the rotor is provided at a lower end thereof. Includes a lower rotary shaft that is detachably screwed, and an upper end of the lower rotary shaft is easily connected to the lower end of the upper rotary shaft vertically in the axial direction, and the upper rotary shaft and the lower rotary shaft are connected to each other. The mixing head according to claim 1 or 2, further comprising a connecting means for rotating the shaft in the same direction. 4. The mixing head according to claim 3, wherein the connecting means and the lower rotary shaft are formed so as to integrally rotate in a circumferential direction of the shaft when connected. 5. The mixing chamber includes a cylindrical tightening seat portion, which is formed to project outward from an outer peripheral wall of the mixing chamber and abuts on the holding portion, at a portion facing the holding portion, The mixing head according to any one of claims 1 to 4, wherein the holding portion includes a fastening seat receiving portion that is formed so as to cover the fastening seat portion and has a male screw formed on an outer peripheral portion thereof. Further, a female screw for screwing the male screw is formed on an inner peripheral portion, and an engaging portion for engaging with a portion of the tightening seat portion protruding from the outer wall of the mixing chamber is provided. A fastener, wherein the fastener is arranged on the outer periphery of the mixing chamber, and the female screw and the male screw are screwed while engaging the engaging portion with the protruding portion of the fastening seat portion. By doing so, the mixing chamber can be easily held in and removed from the holding portion. The mixing head according to any one of claims 1 to 4, which is a characteristic of the mixing head. 6. The upper rotary shaft, the lower rotary shaft, and the rotor are formed with through holes that linearly communicate with each other in an axial direction, and a passage for feeding a heat medium into the rotor is formed through the through holes. The mixing head according to any one of claims 1 to 5, which is formed inside. 7. A pipe member having an outer diameter smaller than the inner diameter is inserted into the through hole, the inside of the pipe member is used as a passage for supplying or discharging a heat medium, and the pipe member. 7. The mixing head according to claim 6, wherein the outside of the is used as a passage for discharging or supplying a heat medium.