JP5180160B2 - Multi-screw extruder - Google Patents

Description

  The present invention is a casing body that rotatably accommodates a plurality of extrusion shafts for extruding a material supplied from a receiving port through a discharge port, and has an opening for inserting and removing the plurality of extrusion shafts; A plurality of bolt insertion holes formed in the shaft support wall body are provided with a casing including a shaft support wall body that closes the opening while rotatably supporting one ends of the support shafts of the plurality of extrusion shafts. The present invention relates to a multi-screw extruder provided with a plurality of fixing bolts that are screwed into the casing body in a direction along the rotational axis of the push-out shaft and fix the shaft support wall body to the casing body.

  Such a multi-screw extruder extrudes a material having a relatively high viscosity such as rubber or molten resin. For example, a material supplied from a material supply machine equipped with a taper screw is used to apply pressure to the multi-screw extruder. It is configured to extrude and extrude and remove foreign matter with a mesh or the like.

  In such a multi-screw extruder, conventionally, the shaft support wall is configured as a single plate, and the shaft portion of the fixing bolt can be inserted into the single plate-shaped shaft support wall. In addition, a plurality of bolt insertion holes having a smaller diameter than the head of the fixing bolt are formed (for example, see Patent Document 1). Accordingly, the shaft support wall body can be fixed to the casing body by the fixing bolt.

JP 2004-218383 A

By the way, in such a multi-screw extruder, at the end of the material extruding operation or when changing the material to be handled, etc., the plural extruding shafts are taken out from the casing body and remain in the plural extruding shafts or inside the casing. The disassembled cleaning that removes the cleaned material and cleans it is performed.
However, in the conventional multi-screw extruder, as described below, complicated work is required when performing disassembly and cleaning, and improvement has been desired.

That is, when removing a plurality of extruded shafts from the casing body, after removing all of the plurality of fixing bolts from the casing body, the shaft support wall body is detached from the casing body and separated from the plurality of extruded shafts. For example, it is necessary to individually move the extrusion shafts one by one in the axial center direction of the support shaft and take them out from the casing body, which is complicated.
Also, when putting a plurality of extruded shafts that have been cleaned into the casing body, first put the plurality of extruded shafts one by one into the casing body, and then place the shaft support wall at a predetermined position on the casing body. A plurality of fixing bolts, which are removed from the casing body, are inserted into the bolt insertion holes of the shaft support wall body one by one with the shaft support wall body supporting the support shafts of the plurality of extrusion shafts. It was necessary to screw into the casing body, and the work was complicated.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a multi-screw extruder capable of speeding up and simplifying the disassembly and cleaning work.

In order to achieve the above object, a multi-screw extruder according to the present invention rotatably accommodates a plurality of extrusion shafts for extruding a material supplied from a receiving port through a discharge port, and includes the plurality of extrusion shafts. There is provided a casing comprising a casing main body having an opening for taking in and out, and a shaft support wall that closes the opening in a state in which one end of a support shaft of the plurality of extrusion shafts is rotatably supported, A plurality of fixing members that are screwed into the casing body in a direction along the rotation axis of the push-out shaft through a plurality of bolt insertion holes formed in the shaft supporting wall body, and fix the shaft supporting wall body to the casing body. A multi-screw extruder provided with bolts, the characteristic configuration of which is
The shaft support wall body is overlapped on the outer side of the lid portion that rotatably supports the support shafts of the plurality of push-out shafts and is movable along the sliding direction along the surface direction of the lid portion. And comprising
The lid portion is provided with a plurality of inner bolt insertion holes through which the heads of the fixing bolts can pass as the plurality of bolt insertion holes,
As the plurality of bolt insertion holes, a shaft portion of the fixing bolt can be inserted into the pressing portion, and a small diameter portion smaller than the head of the fixing bolt and a head of the fixing bolt can pass through. A plurality of elongated outer bolt insertion holes provided in communication with the large-diameter portion are provided in a state in which the respective longitudinal directions are along the slide direction,
With the plurality of fixing bolts loosened, the holding portion is inserted into the position where the fixing bolt is inserted into the small diameter portion of the outer bolt insertion hole and the large diameter portion. It is in the point which is movable along the said slide direction over the position of the state performed.

According to the above characteristic configuration, in a state where the shaft support wall body is fixed to the casing body, the holding portion is in a state where the shaft portion of each fixing bolt is inserted into the small diameter portion of each outer bolt insertion hole (hereinafter referred to as “the shaft portion”). , The shaft portion of each fixing bolt is inserted into the small diameter portion of each outer bolt insertion hole of the pressing portion and each inner bolt insertion hole of the lid portion, Screwed into the main body and tightened.
When removing a plurality of push-out shafts from the casing body, loosen each fixing bolt to the extent that it cannot be removed from each screw hole of the casing body.
Next, the holding part is slid along the sliding direction which is the longitudinal direction of each outer bolt insertion hole, and the position where each fixing bolt is inserted into the large diameter part of each outer bolt insertion hole (hereinafter referred to as the removal position). May be described). And a press part can be removed from a casing main body in the state which the large diameter part of each outer side bolt insertion hole in a press part pulls out from each fixing bolt. Similarly, the lid portion can also be removed from the casing body in a state where each inner bolt insertion hole is removed from each fixing bolt. And if a press part and a cover part are removed from a casing in that way, a some extrusion shaft can be removed from a casing main body.

When inserting a plurality of extrusion shafts into the casing body, first, after inserting the plurality of extrusion shafts into the casing body, the heads of the plurality of fixing bolts that are still attached to the casing body in the inner bolt insertion holes of the lid And the lid is brought into contact with the casing body. Next, the head of each fixing bolt is inserted into the large diameter part of each outer bolt insertion hole of the holding part, and the holding part is inserted in the shaft part of the plurality of fixing bolts, and the holding part is moved in the sliding direction. , The holding part and the cover part can be attached to the casing body by tightening a plurality of fixing bolts at the small diameter part of each outer bolt insertion hole.
That is, it is possible to easily remove the attaching part, the cover part and the plurality of push-out shafts from the casing body or simply attach to the casing body by sliding the holding part with the plurality of fixing bolts attached to the casing body. it can.
Accordingly, it is possible to provide a multi-screw extruder capable of speeding up and simplifying the disassembly and cleaning work.

  A further characteristic configuration of the multi-screw extruder according to the present invention is provided with support shaft fixing means for preventing and fixing relative movement in the axial direction between the lid portion and the support shafts of the plurality of extrusion shafts. There is in point.

According to the above characteristic configuration, at least the lid portion and the plurality of push-out shafts are casing at a time when the support fixing means prevents the relative movement in the axial direction between the cover portion and the support shafts of the plurality of push-out shafts. It can be removed from the body or attached to the casing body.
Therefore, the disassembly and cleaning work can be further simplified.

  A further characteristic configuration of the multi-screw extruder according to the present invention is provided with a guide mechanism for guiding the movement of the lid portion in a direction along the axial direction of the support shaft while maintaining the posture of the lid portion. There is in point.

According to the above characteristic configuration, in the state in which relative movement in the axial direction between the lid portion and the support shafts of the plurality of push-out shafts is prevented by the support shaft fixing means, the cover portion is guided by the guide mechanism and the shaft center of the support shaft. Move in a direction away from the casing body in a direction along the direction. Then, the lid part moves in a state in which the posture is maintained, and the plurality of extrusion shafts move together with the lid part and are taken out from the casing body, and the lid part and the plurality of extrusion shafts are moved to the casing all at once. Can be removed from the body.
Similarly, from the state where the lid portion and the plurality of push-out shafts are located outside the casing body, the lid portion is moved in the direction approaching the casing body in the direction along the axial direction of the support shaft by the guide mechanism. . Then, the lid part moves in a state where the posture is maintained, and a plurality of extrusion shafts move together with the lid part and are put into the casing body, and the lid part and the plurality of extrusion shafts are moved to the casing at once. Can be attached to the body.
Therefore, even if the cover part and the plurality of extrusion shafts are heavy, they can be safely and easily detached from the casing body or attached to the casing body.

According to a further feature of the multi-screw extruder according to the present invention, the casing provided with the pressing portion is arranged in a posture in which the longitudinal direction of the elongated hole-like outer bolt insertion hole is directed in the vertical direction,
There is provided a slide mechanism capable of moving the pressing portion in the vertical direction that is the sliding direction, and holding the fixing bolt at a position where the fixing bolt is inserted into at least the large-diameter portion of the outer bolt insertion hole. In the point.

According to the above characteristic configuration, the holding mechanism can be moved in the vertical direction by the slide mechanism and held at least in the removal position. Therefore, even if the weight is heavy, the pressing part can be safely and easily moved in the vertical direction at least. Can be held in the removal position.
For example, when the casing provided with the pressing portion is arranged in a posture in which the large-diameter portion of the outer bolt insertion hole is positioned on the lower side, the pressing portion is lifted upward and held at the removal position by the slide mechanism. . In this case, when the holding portion is moved downward by the slide mechanism, the shaft portion of each fixing bolt is inserted into the small diameter portion of each outer bolt insertion hole, and the holding portion is moved by the plurality of fixing bolts. Since the slide mechanism is held at the fixed position, the slide mechanism does not necessarily have a function of holding the pressing portion at the fixed position.
Therefore, even if the weight of the pressing portion is heavy, it can be safely and easily moved up and down to be held at the removal position and the fixed position.

Schematic configuration diagram of an extrusion system equipped with a multi-screw extruder according to an embodiment Exploded perspective view of a multi-screw extruder according to an embodiment Vertical side view of a multi-screw extruder according to an embodiment Front view of a multi-screw extruder according to an embodiment The figure of the principal part of the multi-screw extruder explaining the state which fixed the gear support wall body of the gear insertion / removal side to the casing body The figure of the principal part of the multi-screw extruder explaining the state which removed the gear support wall body of the gear insertion / removal side from the casing main body Schematic diagram of a multi-screw extruder explaining the procedure for putting in and out a plurality of gears with respect to the casing body Schematic of a multi-screw extruder according to another embodiment

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an extrusion system including a multi-screw extruder S2 according to the present invention.
This extrusion system, for example, extrudes a material having a relatively high viscosity such as rubber or molten resin. As shown in FIG. 1, a material supply device S1 for extruding and supplying the material from the discharge port 31, and its material supply And a multi-screw extruder S2 that pushes the material supplied from the machine S1 to the receiving port 1 through the discharge port 2 while increasing the pressure.

As shown in FIG. 1, the material supply machine S <b> 1 is configured by arranging a biaxial taper screw 33 in parallel in a case 32 having a discharge port 31, and a material supplied into the case 32 through a supply hopper 34. The biaxial taper screw 33 is configured to be pushed out from the discharge port 31.
Further, the multi-screw extruder S2 is supported on the rail 35 via a support wheel 36, and is provided so as to be able to move far and away so as to be separated from the material supply machine S1 at the time of cleaning or maintenance.

The multi-screw extruder S2 will be described based on FIGS. 4 is a front view of the multi-screw extruder S2, (a) is a front view of a state where a guide plate 22 (an example of the support shaft fixing means F) described later is removed, and (b) It is a front view in the state where guide plate 22 was attached.
The multi-screw extruder S2 is configured as a gear-type pump. Specifically, a plurality of gears 3 (an example of an extrusion shaft) for extruding a material supplied from the receiving port 1 to the inside from the discharge port 2 are provided. A casing body 5 having an opening 4 for accommodating the plurality of gears 3 in and out of the plurality of gears 3 and closing one end of the support shafts 3a of the plurality of gears 3 are closed in a state of being rotatably supported. A casing C provided with a gear support wall 6 (an example of a shaft support wall) is provided.
The gear support wall body 6 is fixed to the casing body 5 by being screwed into the casing body 5 in a direction along the rotational axis A of the gear 3 through a plurality of bolt insertion holes 7 formed in the gear support wall body 6. A plurality of fixing bolts 8 are provided.

The casing main body 5 has a substantially hexagonal outer shape, and includes a gear housing hole 9 (an example of the opening 4) in which a pair of gears 3 meshing with each other is loosely fitted. That is, in this embodiment, the multi-screw extruder S2 is configured to be biaxial. Incidentally, the gear housing hole 9 is formed in a figure 8 shape when viewed in the direction of the rotational axis of the gear 3.
The pair of gears 3 are housed in the casing body 5 with the support shafts 3a being parallel to each other. As each gear 3, for example, a spur gear, a helical gear, a helical gear, or the like can be used.
One of the pair of gears 3 is a drive gear 3D that is transmission-coupled to drive means such as an electric motor via a transmission mechanism (not shown), and the other is a driven gear 3S.

The receiving port 1 and the discharge port 2 are formed in the casing body 5 so as to face a region where the pair of gears 3 in the gear housing hole 9 mesh with each other in a state of facing each other.
Each of the surfaces of the casing main body 5 where the gear housing holes 9 are opened has a plurality (this embodiment) for screwing the fixing bolts 8 in a state of being distributed substantially evenly on the outer peripheral portion of the opening edge of the gear housing holes 9. Twelve screw holes 5n are formed. Incidentally, as the fixing bolt 8, for example, a hexagonal bolt is used, but it is not limited to such a shape.

A pair of the gear support wall bodies 6 are provided so as to close the openings 4 on both sides of the gear housing hole 9, and the end portions of the support shafts 3 a of the pair of gears 3 are respectively attached to the pair of gear support wall bodies 6. A pair of bearing portions 10 that are rotatably supported are provided, and both ends of the support shafts 3 a of the pair of gears 3 are rotatably supported by the pair of gear support wall bodies 6.
In each gear support wall 6, the plurality of (12 in this embodiment) bolt insertion holes 7 correspond to the plurality (12 in this embodiment) screw holes 5 n of the casing body 5. The support wall 6 is formed so as to be distributed substantially evenly on the peripheral edge.

One of the openings 4 on both sides of the gear housing hole 9 is configured to be used for taking in and out the pair of gears 3.
In the present invention, among the pair of gear support wall bodies 6, there are a plurality of (this may be referred to as a gear support wall body 6A on the gear insertion / removal side) that closes the gear insertion / removal opening 4 (this is sometimes referred to as a gear support wall body 6A). The cover 11 that rotatably supports the support shaft 3a of the gear 3 in the embodiment) and the outer side of the cover 11 are overlapped, and are movable along the sliding direction along the surface direction of the cover 11. The holding part 12 is provided.

The lid portion 11 is provided with a plurality of inner bolt insertion holes 13 through which the heads 8h of the fixing bolts 8 can pass as the plurality of bolt insertion holes 7.
Further, as the plurality of bolt insertion holes 7, the shaft portion 8 a of the fixing bolt 8 can be inserted into the holding portion 12, and the small diameter portion 14 s and the fixing bolt 8 are smaller in diameter than the head 8 h of the fixing bolt 8. A plurality of long hole-like outer bolt insertion holes 14 provided in communication with a large-diameter portion 14b through which the head 8h can pass are provided in a state in which the respective longitudinal directions are along the sliding direction.
Then, in a state where the plurality of fixing bolts 8 are loosened, the holding portion 12 is positioned between the position (fixed position) in which the fixing bolt 8 is inserted into the small diameter portion 14s of the outer bolt insertion hole 14 and the large diameter portion 14b. It is movable along the sliding direction over a position (removal position) where the fixing bolt 8 is inserted.
Specifically, in the plurality of long hole-like outer bolt insertion holes 14, the small diameter portion 14s is located on the same side, and the arrangement direction (corresponding to the longitudinal direction) of the small diameter portion 14s and the large diameter portion 14b is parallel to each other. It is provided in the form which becomes.
Incidentally, each inner bolt insertion hole 13 has a circular hole shape, and each long hole-shaped outer bolt insertion hole 14 has a dart hole shape.

Further, support shaft fixing means F is provided for preventing and fixing relative movement in the axial direction between the lid portion 11 and the support shafts 3a of the plurality of gears 3.
Further, a guide mechanism G is provided for guiding the movement of the lid portion 11 in the direction along the axial direction of the support shaft 3a of the gear 3 while maintaining the posture of the lid portion 11.

Next, description will be added about each part of the multi-screw extruder S2.
As shown in FIGS. 2-4, the cover part 11 is comprised by the rectangular-plate shape substantially the same shape as the external shape of the surface in which the opening part 4 in the casing main body 5 was formed.
The pair of bearing portions 10 are attached to the center of the inner surface of the lid portion 11 (the surface to be applied to the casing body 5), and the pair of gears 3 supported by the pair of bearing portions 10 are supported. A pair of support shaft through-holes 11h are formed through the shaft 3a.
The portion inserted into the lid portion 11 of the gear support wall 6A on the gear insertion / removal side of each of the support shafts 3a of the pair of gears 3 has a length that is substantially flush with the outer surface of the pressing portion 12, A screw hole 3n for screwing a gear assembly bolt 15 (an example of the support shaft fixing means F), which will be described later, is formed.

The pressing portion 12 is configured in a frame shape having an opening that allows the pair of support shaft through holes 11 h of the lid portion 11 to face the outside.
As shown also in FIGS. 5 and 6, the pressing portion 12 has the fixing position (FIG. 5) for attaching the gear support wall body 6 </ b> A on the gear loading / unloading side composed of the pressing portion 12 and the lid portion 11 to the casing body 5. Reference) and the removal position (see FIG. 6) for removing the gear support wall 6A from the casing body 5 along the longitudinal direction of the outer bolt insertion hole 14 along the surface direction of the lid 11 (in the sliding direction). It is configured to be movable.
The plurality of outer bolt insertion holes 14 communicate with the plurality of inner bolt insertion holes 13 of the lid portion 11 when the pressing portion 12 is positioned at the fixed position (see FIG. 5). In addition, when the holding portion 12 is positioned at the removal position, the plurality of large diameter portions 14b are formed so as to communicate with the plurality of inner bolt insertion holes 13 of the lid portion 11 (see FIG. 6). Yes.

As shown in FIGS. 2 and 3, the gear support wall body 6B different from the gear insertion / removal side is configured as a rectangular plate having the same shape as the lid portion 11 of the gear support wall body 6A on the gear insertion / removal side. The pair of bearing portions 10 are attached to the central portion of the.
A plurality of bolt insertion holes in the form of circular holes having a diameter smaller than that of the head 8h of the fixing bolt 8 can be inserted into the gear support wall 6B different from the gear insertion / removal side. 7 is formed so as to be distributed substantially evenly on the peripheral edge of the gear support wall 6B so as to correspond to the plurality of screw holes 5n of the casing body 5, and further, a pair of gears supported by the pair of bearings 10 A pair of support shaft through-holes 6h that allow the three support shafts 3a to pass therethrough are formed.

As shown in FIGS. 3 and 4, in the casing C configured as described above, the small-diameter portion 14s of the long hole-like outer bolt insertion hole 14 is located on the upper side, and the longitudinal direction of the outer bolt insertion hole 14 is In a posture facing in the up-down direction, a gear support wall body 6B different from the gear loading / unloading side is disposed on the mount 17 in a cantilever manner by the support member 16.
Then, the holding part 12 can be moved in the vertical direction, which is the sliding direction, and can be held at least at a position where the fixing bolt 8 is inserted through the large-diameter part 14b of the outer bolt insertion hole 14 (that is, the removal position). A sliding mechanism M is provided.
The slide mechanism M will be further described.
As shown in FIGS. 2 to 6, in the state in which the casing C is arranged in this way, a protruding portion 18 is provided on the upper end portion of the pressing portion 12 so as to protrude toward the lid portion 11, and the protruding portion 18. The slide bolt 19 is screwed into the screw hole 18n provided in the front end so that the tip of the slide bolt 19 is in contact with the side surface (upper end surface) of the lid portion 11 (see FIG. 3).
Then, with the plurality of fixing bolts 8 loosened, the holding bolt 12 can be moved in the vertical sliding direction by rotating the sliding bolt 19 forward and backward to be held at the fixing position and the removing position. it can. That is, the slide mechanism M is configured by the overhang portion 18 and the slide bolt 19. Incidentally, as the slide bolt 19, for example, a hexagon bolt is used.

As shown in FIGS. 3 and 4, a pair of guide shafts 20 (an example of a guide mechanism G) are disposed on the gantry 17 below the casing C, and the longitudinal directions of the shafts are the axes of the support shafts 3 a of the gears 3. It is provided so as to protrude from the casing C on the side of the gear support wall 6A on the gear insertion / removal side in a state along the center direction.
A cylindrical guide member 21 is provided on each of the pair of guide shafts 20 so as to be movable in the longitudinal direction of the guide shaft 20, and a guide plate 22 is supported by the pair of guide members 21 in a standing posture. ing.
That is, the guide plate 22 is provided so as to be movable in the axial direction of the support shaft 3 a of the gear 3 by the guide of the pair of guide shafts 20.

The guide plate 22 is concentric with the screw holes 3n formed on the end surfaces of the support shafts 3a of the pair of gears 3 in a state where the guide plate 22 is in contact with the pressing portion 12 of the gear support wall 6A on the gear insertion / removal side. In addition, a pair of bolt insertion holes 22h is formed.
Then, with the guide plate 22 applied to the holding part 12, the gear assembly bolts 15 are screwed into the screw holes 3n of the support shafts 3a of the gears 3 through the respective bolt insertion holes 22h and tightened. The gear 3, the lid part 11, and the pressing part 12 can be assembled together.
That is, the support shaft fixing means F is configured by the guide plate 22 and the two gear assembly bolts 15, and the guide mechanism G is configured by the pair of guide shafts 20.

  Next, a procedure for taking out the plurality of gears 3 from the casing body 5 and putting it into the casing body 5 will be described with reference to FIGS. In addition, (a) of FIG. 5 is a front view of the principal part of multi-screw extruder S2, (b) is a Vb-Vb arrow view of (a), (a) of FIG. It is a front view of the principal part of multi-screw extruder S2, (b) is a VIb-VIb arrow line view of (a).

  As shown in FIGS. 5 and 7A, in the state where the gear support wall 6A on the gear insertion / removal side is fixed to the casing body 5, the pressing portion 12 is positioned at the fixed position, and a plurality of the pressing portions 12 are provided. Each of the small diameter portions 14 s of the outer bolt insertion holes 14 communicates with each of the plurality of inner bolt insertion holes 13 of the lid portion 11, and the shaft portion 8 a of each fixing bolt 8 is the small diameter portion 14 s of each outer bolt insertion hole 14. And inserted into each inner bolt insertion hole 13 and screwed into each screw hole 5n of the casing body 5 to be tightened.

When taking out the plurality of gears 3 from the casing body 5, first, as shown in FIG. 6A, first, the fixing bolts 8 are loosened so as not to come out from the screw holes 5 n of the casing body 5.
Next, as shown in FIGS. 7A and 7B, the slide bolt 19 is turned in a direction to be screwed into the screw hole 18n of the overhanging portion 18, and the pressing portion 12 is moved upward to be positioned at the removal position. Let Thus, in the state where the pressing portion 12 is located at the removal position, the large diameter portions 14b of the plurality of outer bolt insertion holes 14 of the pressing portion 12 communicate with the plurality of inner bolt insertion holes 13 of the lid portion 11, respectively. It has become.

Next, as shown in FIG. 7B, the guide plate 22 is supported on the pair of guide shafts 20 and moved to the casing C side by the guide of the pair of guide shafts 20 to support the gear on the gear loading / unloading side. It applies to the pressing part 12 of the wall 6A.
Then, the gear assembly bolts 15 are inserted into the bolt insertion holes 22 h of the guide plate 22, screwed into the screw holes 3 n of the support shafts 3 a of the gears 3, and tightened.
Then, the plurality of gears 3, the lid portion 11, and the pressing portion 12 are integrally assembled by the support shaft fixing means F including the guide plate 22 and the gear assembly bolt 15.

Next, as shown in FIGS. 6B and 7C, when the guide plate 22 is moved to the side away from the casing body 5 by the guide of the pair of guide shafts 20, the outer bolts of the pressing portion 12 are inserted. While the large-diameter portion 14b of the hole 14 and the inner bolt insertion holes 13 of the lid portion 11 are removed from the respective fixing bolts 8, the plurality of gears 3, the lid portion 11 and the pressing portion 12 are integrally separated from the casing body 5. The plurality of gears 3 are removed from the casing body 5. The movement of the plurality of gears 3, the lid portion 11, and the pressing portion 12 as described above may be performed by directly pulling the guide plate 22, but may be performed using a push bolt or the like.
In this manner, with the plurality of gears 3 taken out from the casing body 5, the plurality of gears 3, the inside of the gear housing hole 9 of the casing body 5, and the like are cleaned.

  When the plurality of gears 3 are put into the casing body 5, as shown in FIG. 7C, the casing body 5 is assembled by integrally assembling the plurality of gears 3, the lid portion 11, and the pressing portion 12 by the support shaft fixing means F. The guide plate 22 is moved to the side closer to the casing body 5 by the guide of the pair of guide shafts 20 from the state of being located outside. Then, while the plurality of gears 3 are put into the casing body 5 through the opening 4, the large-diameter portion 14 b of each outer bolt insertion hole 14 of the holding portion 12 and the inner bolt insertion hole 13 of the lid portion 11 are connected to the casing body 5. The fixing bolts 8 screwed together are inserted, and the lid portion 11 is applied to the casing body 5.

Next, as shown in FIG. 5, the slide bolt 19 is rotated in the direction to be pulled out from the screw hole 18 n of the overhanging portion 18, and the pressing portion 12 is moved downward to be positioned at the fixed position. Thus, in the state where the pressing portion 12 is located at the fixed position, the small diameter portions 14 s of the plurality of outer bolt insertion holes 14 of the pressing portion 12 communicate with the plurality of inner bolt insertion holes 13 of the lid portion 11. ing.
When the fixing bolts 8 are screwed into the screw holes 5n of the casing body 5 and tightened, the gear support wall 6A on the gear insertion / removal side is fixed to the casing body 5.

  Next, each gear assembly bolt 15 is removed from each bolt insertion hole 22 h of the guide plate 22, and the guide plate 22 is moved away from the casing C by the guide of the pair of guide shafts 20. Remove from.

[Another embodiment]
Next, another embodiment will be described.
(A) In the above embodiment, the multi-screw extruder S2 is configured as a gear-type pump in which the two gears 3 are arranged side by side with a plurality of extrusion shafts. You may comprise as another type pumps, such as a screw type, arranged in parallel as a plurality of extrusion axes.
Here, the plurality of extrusion shafts for extruding the material supplied from the receiving port to the inside from the discharge port are formed so as to form a concave part capable of accommodating the material on the outer peripheral part, and the concave part is formed by rotating them. Shows a shaft configured to receive material from the receiving port, move the received material to the discharge port, and discharge the moved material to the discharge port.
In the above-described embodiment, the number of extrusion shafts housed in the casing has been described as being two, but is not limited to this configuration, and may be configured with three or more shafts.

(B) The shape of the long hole-like outer bolt insertion hole 14 is not limited to the shape of the daruma hole as in the above embodiment, but the shaft portion 8a of the fixing bolt 8 can be inserted and the fixing bolt 8 can be inserted. Various shapes are possible under the condition that the small-diameter portion 14s having a smaller diameter than the head portion 8h and the large-diameter portion 14b through which the head portion 8h of the fixing bolt 8 can pass are communicated.

(C) The sliding direction of the pressing portion 12 is not limited to a linear shape as in the above embodiment, and may be a curved shape such as an arc shape.
The longitudinal direction of the long hole-like outer bolt insertion hole 14 is made to match the sliding direction of the pressing portion 12.

(D) As the fixing bolt 8, the gear assembly bolt 15, and the slide bolt 19, various bolts can be used in addition to the hexagon bolts exemplified in the above embodiment. For example, a hexagon socket head cap screw (cap bolt) having a columnar head and a hexagonal hole can be used.

(E) In the above embodiment, the guide plate 22 constituting the support shaft fixing means F is provided so as to be moved and guided by the pair of guide shafts 20 in a direction along the axial center direction of the support shaft 3 a of the gear 3. However, the guide plate 22 may be provided in a state of being separated from the pair of guide shafts 20.
In this case, by attaching a pair of guide members 21 to the lid portion 11 and fitting the pair of guide members 21 to a pair of guide shafts 20 as the guide mechanism G, the lid portion 11 is directly attached to the pair of guide shafts. 20 is configured to move and guide in a direction along the axial direction of the support shaft 3a of the gear 3. The guide plate 22 can be applied to the pressing portion 12 and can be removed from the pressing portion 12.
Further, in the above embodiment, the support shaft fixing means F is configured so that the plurality of gears 3, the lid portion 11 and the pressing portion 12 are assembled together, and the plurality of gears 3, the lid portion 11 and the pressing portion 12 are assembled. It was configured to be integrally removed from the casing body 5 or attached to the casing body 5.
Instead of this, the support shaft fixing means F is configured so that only the plurality of gears 3 and the lid 11 are assembled together, and only the plurality of gears 3 and the lid 11 are integrally removed from the casing body 5 or the casing. You may make it attach to the main body 5. FIG. If it does in this way, the press part 12 will be removed from the casing main body 5 separately from these some gears 3 and the cover part 11, or will be attached to the casing main body 5.
That is, when taking out the plurality of gears 3 from the casing body 5, first, the pressing portion 12 is removed from the casing body 5, and then the guide plate 22 is moved to the side closer to the casing body 5 by the guide of the pair of guide shafts 20. And a plurality of gears by inserting the gear assembly bolts 15 into the bolt insertion holes 22h of the guide plate 22 and screwing them into the screw holes 3n of the support shafts 3a of the gears 3, respectively. 3 and the lid 11 are assembled together. Further, when the plurality of gears 3 are put into the casing body 5, the plurality of gears 3 and the lid portion 11 positioned outside the casing body 5 in the state of being integrally assembled as described above are guided by the pair of guide shafts 20. Then, after moving to the side closer to the casing body 5 and putting the plurality of gears 3 into the casing body 5, the pressing portion 12 is attached to the casing body 5.

(F) In the above embodiment, the case where the pair of guide shafts 20 is provided on the gantry 17 that supports the casing C and the guide mechanism G is assembled integrally with the gantry 17 is illustrated. And may be provided separately.
In this case, as shown in FIG. 8, a pair of guide shafts 20 similar to those in the above-described embodiment are provided on the guide mechanism support base 23 that is separate from the base 17 that supports the casing C. In this case, if the guide mechanism support base 23 is configured to be movable, the guide mechanism G can be moved away from the casing C when the multi-screw extruder S2 is normally operated. Can be prevented from interfering with the normal material extrusion operation.

(G) In order to move the guide plate 22 by the guide of the pair of guide shafts 20, an actuator such as an electric cylinder or a hydraulic cylinder may be provided. Further, an actuator such as an electric cylinder or a hydraulic cylinder may be provided in order to move the pressing portion 12 between the fixing position and the removal position.

(H) In the above embodiment, the case where the pair of guide shafts 20 is provided below the casing C and the guide plate 22 is guided in a standing posture is illustrated. However, the guide plate 22 is guided in this manner. It is not limited to the form of guiding in a standing posture.
For example, a pair of guide shafts 20 may be provided above the casing C, and the guide plate 22 may be guided in a suspended posture.

(I) When the slide mechanism M is configured by the overhanging portion 18 and the slide bolt 19 as in the above embodiment, the overhanging portion 18 may be provided at the lower end of the pressing portion 12.
Further, the slide mechanism M is not limited to the configuration of the above-described embodiment, and may be configured to include a clamping part, a cam mechanism, a cylinder, and the like.

(J) The arrangement form of the casing C may be an arrangement form in which the longitudinal direction of the outer bolt insertion hole 14 faces the horizontal direction.
In this case, for example, a protruding portion 18 is provided at one end in the left-right direction of the pressing portion 12, and the tip of the slide bolt 19 is in contact with the side surface of the lid portion 11 in the screw hole 18 n provided in the protruding portion 18. By screwing, the pressing portion 12 is moved in the lateral sliding direction to be positioned at the fixing position and the detaching position.

(K) The guide mechanism G as in the above embodiment is omitted, and the plurality of gears 3, the lid portion 11, and the pressing portion 12 that are integrally assembled by the support shaft fixing means F are moved by a carriage or the like, and the casing body 5 may be taken in and out.

  As described above, a multi-screw extruder capable of speeding up and simplifying the disassembly and cleaning work can be provided.

1 Receiving port 2 Discharging port 3 Gear (extrusion shaft)
3a Support shaft 4 Opening 5 Casing body 6 Gear support wall (shaft support wall)
7 Bolt insertion hole 8 Fixing bolt 8a Shaft part 8h Head part 11 Lid part 12 Holding part 13 Inner bolt insertion hole 14 Outer bolt insertion hole 14b Large diameter part 14s Small diameter part 18 Overhang part 18n Screw hole 19 Slide bolt A Rotating shaft Center C Casing F Spindle fixing means G Guide mechanism M Slide mechanism

Claims (4)

A casing main body that rotatably accommodates a plurality of extrusion shafts for extruding material supplied to the inside from the receiving port from the discharge port, and has an opening for taking in and out the plurality of extrusion shafts, and the plurality of extrusions A casing provided with a shaft support wall that closes the opening in a state in which one end of a support shaft of the shaft is rotatably supported;
A plurality of fixings that are screwed into the casing body in a direction along the rotation axis of the push-out shaft through a plurality of bolt insertion holes formed in the shaft supporting wall body, and fix the shaft supporting wall body to the casing body. A multi-screw extruder provided with a bolt for use,
The shaft support wall body is overlapped on the outer side of the lid portion that rotatably supports the support shafts of the plurality of push-out shafts and is movable along the sliding direction along the surface direction of the lid portion. And comprising
The lid portion is provided with a plurality of inner bolt insertion holes through which the heads of the fixing bolts can pass as the plurality of bolt insertion holes,
As the plurality of bolt insertion holes, a shaft portion of the fixing bolt can be inserted into the pressing portion, and a small diameter portion smaller than the head of the fixing bolt and a head of the fixing bolt can pass through. A plurality of elongated outer bolt insertion holes provided in communication with the large-diameter portion are provided in a state in which the respective longitudinal directions are along the slide direction,
With the plurality of fixing bolts loosened, the holding portion is inserted into the position where the fixing bolt is inserted into the small diameter portion of the outer bolt insertion hole and the large diameter portion. A multi-screw extruder that is movable along the sliding direction over a position in a state of being operated.   2. The multi-screw extruder according to claim 1, further comprising support shaft fixing means for preventing and fixing relative movement in an axial direction between the lid portion and the support shafts of the plurality of extrusion shafts.   The multi-screw extruder according to claim 2, wherein a guide mechanism is provided for guiding the movement of the lid in a direction along the axial direction of the support shaft in a state in which the attitude of the lid is maintained. The casing provided with the pressing portion is arranged in a posture in which the longitudinal direction of the elongated hole-like outer bolt insertion hole is directed in the vertical direction,
There is provided a slide mechanism capable of moving the pressing portion in the vertical direction that is the sliding direction, and holding the fixing bolt at a position where the fixing bolt is inserted into at least the large-diameter portion of the outer bolt insertion hole. The multi-screw extruder according to any one of claims 1 to 3.

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