Continuous extruder

Abstract

To remove a junction box from a reducer without disassembling or moving a barrel.SOLUTION: There is provided a continuous extruder, comprising: a reducer 15; a barrel 19 that houses a screw shaft 13; a coupling 26 that connects an output shaft 15a of the reducer 15 to a rotating shaft 13a of the screw shaft 13; and a junction box 18 that is arranged between the reducer 15 and the barrel 19. A reducer side wall 18a of the junction box 18 has a through hole that allows the output shaft 15a of the reducer 15 to pass through. A dividing surface that forms a boundary between a plurality of body parts 30 that make up the junction box 18 includes a first dividing surface 32a that crosses the through hole and separates the reducer side wall 18a, and a second dividing surface 32b that separates the plate 30a from another body part.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a continuous extruder. [Background technology]

[0002] A conventional continuous extruder is known, as disclosed in Patent Document 1 below, which continuously extrudes a material by driving a screw shaft with a motor. Patent Document 1 discloses a continuous extruder shown in FIG. 28. This extruder includes a motor 82 and a reducer 83 mounted on a base 81, a barrel 84 configured with multiple barrel pieces 84a arranged axially and housing a screw shaft, a junction box 85 disposed between the reducer 83 and the barrel 84, and a die head 86. A shaft 91 of the screw shaft and a shaft 92 of the reducer 83 are connected to each other within the junction box 85. A material inlet 94 is provided in the barrel piece 84a adjacent to the junction box 85, and the introduced material is fed axially through the barrel 84 by the screw shaft and extruded through the die head 86.

[0003] As shown in FIG. 29, Patent Document 2 below discloses a coupling 95 that is arranged inside a junction box 85 and connects a shaft 92 of a reducer 83 and a rotating shaft 91 of a screw shaft. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-179786 [Patent Document 2] Japanese Patent Application Publication No. 6-179212 Summary of the Invention [Problem to be solved by the invention]

[0005] In the continuous extruder disclosed in Patent Document 1, maintenance of reducer 83 is required. Reducer 83 needs to be disassembled during maintenance, and in that case, as a preliminary step to the step of dividing or disassembling the housing of reducer 83, junction box 85 needs to be removed from reducer 83 and moved to a location where it will not get in the way. Note that, as a preliminary step to dividing or disassembling the housing of reducer 83, it would be ideal if motor 82 and reducer 83 could be moved separately, but reducer 83 and motor 82 are very large in size and very heavy, and therefore moving reducer 83 and motor 82 is not practical.

[0006] To remove the junction box 85 from the reducer 83, the barrel 84 needs to be moved axially. However, this requires a great deal of effort because the barrel 84, which is made up of many barrel pieces 84a, needs to be disassembled and moved.

[0007] Therefore, the present invention has been made in consideration of the above-mentioned conventional technology, and its object is to provide a continuous extruder in which the junction box can be removed from the reducer without disassembling or moving the barrel. [Means for solving the problem]

[0008] To achieve the above object, the present invention provides a continuous extruder comprising: a drive motor; a reducer having an output shaft and configured to reduce the rotational speed of the output shaft relative to the rotational speed of the drive motor; a screw shaft having a rotating shaft; a barrel housing the screw shaft; a coupling for connecting the output shaft of the reducer to the rotating shaft of the screw shaft; and a junction box having at least a reducer side wall, a barrel side wall, a top wall, and a bottom wall, the junction box housing the coupling and disposed between the reducer and the barrel. The coupling is configured to be capable of being in a connected state in which the output shaft and the rotating shaft are connected to each other, and a disconnected state in which the output shaft and the rotating shaft are disconnected. The reducer side wall has a through hole through which the output shaft of the reducer passes. The junction box has a plurality of divided body parts, and dividing surfaces that form boundaries between the plurality of body parts include a first dividing surface that crosses the through hole and divides the reducer side wall, and a second dividing surface that divides a portion of the barrel side wall, the ceiling wall, and the bottom wall from the other portions.

[0009] In the continuous extruder according to the present invention, the reducer side wall of the junction box is divided by a first dividing surface that crosses the through hole through which the output shaft of the reducer passes, and a portion of the barrel side wall, top wall, and bottom wall is divided from the remaining portions of the barrel side wall, top wall, and bottom wall by a second dividing surface. This allows at least some of the body parts constituting the reducer side wall to be detached from the other body parts. By removing at least some of the body parts constituting the reducer side wall, the output shaft of the reducer is no longer enclosed by the reducer side wall, and the coupling housed in the junction box can be exposed. In this state, the coupling can be operated to a disengaged state in which the output shaft of the reducer and the rotating shaft of the screw shaft are disconnected. Therefore, the output shaft can be moved to the side exposed by the removed body part, eliminating the need to retract the barrel axially during reducer maintenance, thereby reducing the labor required for reducer maintenance. When the barrel is composed of multiple barrel pieces, disassembly of the barrel is not required.

[0010] Some of the body parts may be formed in a shape that, when separated from the other body parts at the first dividing surface and the second dividing surface, opens a space through which the output shaft can pass.

[0011] In this embodiment, some body parts are separated from the other body parts at the first dividing surface and the second dividing surface, creating an open space through which the output shaft of the reducer can be removed. Therefore, the output shaft can be removed simply by removing the body part. It is also possible to remove all body parts in consideration of maintenance work on the reducer.

[0012] The screw shaft may be movable in the axial direction, and a length from the barrel side wall of the junction box to the tip of the output shaft in the axial direction of the output shaft or the rotation shaft may be longer than the axial length of the coupling. In this aspect, the coupling can be removed from the output shaft within the junction box by moving the screw shaft in the axial direction so as to come out of the junction box and then moving the coupling toward the barrel without removing the junction box.

[0013] When the left-right direction when the junction box is viewed in the axial direction of the screw shaft is defined as a side, the junction box may have a structure in which the side wall is open or an opening is formed in a part of the side wall. In this case, the opening may be formed so that its vertical length is longer than the vertical length of the coupling, its axial length is longer than the axial length of the coupling, and it may be located at a position that allows the coupling to be removed from the side.

[0014] In this embodiment, the coupling can be removed from the junction box through the opening in the junction box. Note that it is also possible to remove the coupling after exposing it by removing some of the body parts that make up the junction box.

[0015] The junction box may further include a cover that covers the opening. In this aspect, even if the junction box has an opening, the coupling is not directly exposed.

[0016] The cover may have a mesh structure in a region facing at least a portion of the coupling, so that at least a portion of the coupling can be observed from outside the junction box through the mesh structure.

[0017] The body parts constituting the junction box may include a plate that is a separate member from one or more body parts constituting the top wall and the bottom wall and that forms the barrel side wall alone. In this case, the plate may be made of a material harder than one or more body parts constituting the top wall and the bottom wall and may be connected to the barrel.

[0018] In this embodiment, the plate is made of a material harder than the other body parts, ensuring the fastening force of the plate to the barrel. In other words, by making the plate harder than the other body parts that are not fastened to the barrel, each body part can be made of a material with a hardness appropriate for its function.

[0019] The continuous extruder according to the present invention includes a drive motor, a reducer, a reducer having an output shaft and configured to reduce the rotational speed of the output shaft relative to the rotational speed of the drive motor, a screw shaft having a rotating shaft, a barrel housing the screw shaft, a coupling for connecting the output shaft of the reducer to the rotating shaft of the screw shaft, and a junction box disposed between the reducer and the barrel while housing the coupling. The coupling is configured to be capable of two states: a connected state in which the output shaft and the rotating shaft are connected to each other, and a disconnected state in which the output shaft and the rotating shaft are disconnected and detached from the output shaft. The junction box is configured by combining a plurality of separate body parts, including a reducer-side part that has a reducer side wall with a through hole formed therein through which the output shaft of the reducer passes and is detachable from the reducer. Other body parts other than the reducer-side part are disposed between the reducer-side part and the barrel and are detachable from the reducer-side part and the barrel. The axial length of the coupling is shorter than the gap between the barrel and the output shaft of the reducer, and the axial length of the reducer side part is shorter than the gap between the barrel and the output shaft.

[0020] In the continuous extruder according to the present invention, the junction box is configured by combining multiple divided body parts, and the other body parts other than the reducer-side part are detachable from the reducer-side part and the barrel. Therefore, by removing the other parts, the space between the barrel and the reducer-side part is opened. Furthermore, since the axial length of the coupling is shorter than the distance between the barrel and the output shaft of the reducer, the coupling can be removed through the opened space. Furthermore, since the axial length of the reducer-side part is shorter than the distance between the barrel and the output shaft of the reducer, the reducer-side part that has been released from its connection with the reducer can also be removed through the opened space. Therefore, there is no need to retract the barrel in the axial direction during reducer maintenance, which reduces the labor required for reducer maintenance. Furthermore, if the barrel is configured with multiple barrels, there is no need to disassemble the barrel.

[0021] When the left-right direction when viewing the junction box from the axial direction of the screw shaft is defined as the side, the junction box may have a structure in which the side wall is open or an opening is formed in a part of the side wall. Also, the other part may have a wall whose axial length is shorter than the length between the barrel and the coupling. In this case, a dividing surface that is a boundary between the reducer-side part and the other part may cross the opening.

[0022] In this embodiment, the other part has a wall portion whose axial length is shorter than the distance between the barrel and the coupling, so the other part can be removed by passing this wall portion between the barrel and the coupling. Then, by removing the other part from the reducer-side part and the barrel, the opening of the junction box is opened. Therefore, the coupling can be removed by removing the hanging tool hung on the coupling so as to suspend it from the opened opening.

[0023] When the left-right direction when viewing the junction box from the axial direction of the screw shaft is defined as a side, the junction box may have a structure in which the side wall is open or an opening is formed in a part of the side wall. In this case, the vertical length of the opening may be longer than the vertical length of the coupling, and the axial length of the opening may be longer than the axial length of the coupling. In this case, the opening may be provided at a position that allows the coupling to be removed from the side.

[0024] In this embodiment, the coupling can be removed through the opening of the junction box. That is, when removing other parts, the coupling can be removed through the space opened between the barrel and the reducer-side part by removing the other parts. Furthermore, the coupling can also be removed through the opening of the junction box without removing the other parts. Therefore, the method of removing the coupling can be selected depending on the purpose of the work. [Effects of the Invention]

[0025] As described above, according to the present invention, the junction box can be removed from the reducer without disassembling or moving the barrel. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a diagram showing a continuous extruder according to a first embodiment. [Figure 2] FIG. 2 is a cross-sectional view showing a junction box portion in a continuous extruder. [Figure 3] FIG. 2 is a cross-sectional view showing the inside of the junction box as viewed from above. [Figure 4] FIG. 2 is a schematic diagram for explaining a junction box portion. [Figure 5] FIG. 4 is a diagram schematically illustrating a reducer side wall of the junction box when viewed in the axial direction. [Figure 6]FIG. 10 is a diagram illustrating the configuration of a junction box provided in the continuous extruder according to the second embodiment. [Figure 7] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the second embodiment. [Figure 8] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the second embodiment. [Figure 9] FIG. 10 is a diagram showing a state in which upper and lower parts of the junction box have been removed. [Figure 10] FIG. 10 is a diagram showing a state in which a hoisting tool is hung around the coupling and the coupling is suspended from above. [Figure 11] FIG. 10 is a view showing a state in which the rotation axis of the screw shaft is housed in the barrel. [Figure 12] FIG. 10 is a view showing a state in which the coupling is removed. [Figure 13] FIG. 10 is a diagram showing a state in which the upper part of the junction box is removed. [Figure 14] FIG. 10 is a diagram showing a state in which a hoisting tool is hung around the coupling and the coupling is suspended from above. [Figure 15] FIG. 10 is a view showing a state in which the rotation axis of the screw shaft is housed in the barrel. [Figure 16] FIG. 10 is a view showing a state in which the coupling is removed. [Figure 17] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a third embodiment. [Figure 18] FIG. 4 is a diagram schematically illustrating a reducer side wall of the junction box when viewed in the axial direction. [Figure 19] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a fourth embodiment. [Figure 20] 10 is a diagram showing a state in which the coupling is suspended from above by a hoisting tool with other parts removed and the rotation axis of the screw shaft housed in the barrel. FIG. [Figure 21] FIG. 10 is a view showing a state in which the coupling is removed. [Figure 22] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the fourth embodiment. [Figure 23] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the fourth embodiment. [Figure 24] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a fifth embodiment. [Figure 25] FIG. 13 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the fifth embodiment. [Figure 26] FIG. 13 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a modified example of the fifth embodiment. [Figure 27] FIG. 10 is a diagram illustrating the configuration of a junction box provided in a continuous extruder according to a sixth embodiment. [Figure 28] FIG. 1 is a diagram showing a conventional continuous extruder. [Figure 29] FIG. 1 is a diagram showing a conventional continuous extruder. DETAILED DESCRIPTION OF THE INVENTION

[0027] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0028] (First embodiment) As shown in Figure 1, the continuous extruder 10 according to this embodiment is an extruder for kneading and extruding materials such as plastics, and includes a screw shaft 13, a drive motor 14 that generates driving force for driving the screw shaft 13, and a reducer 15 that reduces the rotation speed of the drive motor 14 and transmits the reduced rotation speed to the screw shaft 13. The drive motor 14 and reducer 15 are installed on a base 16, and the reducer 15 is disposed to the side of the drive motor 14 (on the left side of Figure 1).

[0029] A junction box 18 is adjacent to the reducer 15, and this junction box 18 connects the reducer 15 and the barrel 19. An axially extending space is formed within the barrel 19, and the rotor portion 13b of the screw shaft 13 is stored in this space. The barrel 19 is configured to have multiple barrel pieces 19a lined up in the axial direction, and the barrel piece 19a located most upstream (i.e., on the reducer 15 side) is provided with a feeding section 21 for feeding material. When the screw shaft 13 rotates, the material fed through the feeding section 21 is sent through the space within the barrel 19 toward the tip side.

[0030] A diverter body 22 is provided at the tip of the barrel 19 to discharge resin during startup and check whether the resin is molten. The diverter body 22 is a component equipped with a valve that can switch between discharging the molten resin to the outside and flowing it downstream. When the diverter body 22 is removed from the barrel 19, the screw shaft 13 can be moved toward the diverter body 22.

[0031] The barrel 19 is supported by one or more support bases 23, but is also supported by the junction box 18. That is, the junction box 18 supports one end of the barrel 19 while being disposed between the barrel 19 and the reducer 15. For this reason, the junction box 18 is made of a sturdy housing.

[0032] The reducer 15 includes a gear mechanism (not shown) that is driven by the drive motor 14 and reduces the input rotational speed, an output shaft 15a that is driven at the rotational speed reduced by the gear mechanism, and a housing 15b that accommodates the gear mechanism. The housing 15b is configured by stacking multiple components 15c (see FIG. 2) vertically, and the components 15c can be removed in order starting from the top. The interior of the housing 15b can be exposed by removing at least the topmost component 15c.

[0033] Because adjacent components 15c are fastened to one another by fasteners 41, when performing maintenance on the gear mechanism, the fasteners 41 can be removed to remove some of the components 15c and divide the housing 15b. Note that FIG. 2 shows an example in which the housing 15b is composed of four components 15c. In this housing 15b, removing the top two components 15c allows the output shaft 15a to be moved upward. However, the housing 15b is not limited to being composed of four components 15c, and the number of components 15c is arbitrary.

[0034] The output shaft 15a of the reducer 15 extends so as to protrude from the housing 15b. The output shaft 15a is connected to the rotating shaft 13a of the screw shaft 13 via a coupling 26 (see FIGS. 2 and 3) arranged in the junction box 18. That is, the output shaft 15a of the reducer 15 extends laterally (to the left in FIG. 1) from the housing 15b and is inserted into the junction box 18. On the other hand, the rotating shaft 13a of the screw shaft 13 extends laterally (to the right in FIG. 1) from the rotor portion 13b of the screw shaft 13 and is inserted into the junction box 18. Then, in the junction box 18, the coupling 26 connects the output shaft 15a of the reducer 15 to the rotating shaft 13a of the screw shaft 13.

[0035] The coupling 26 is cylindrical and fixed to the output shaft 15a and the rotating shaft 13a. However, the coupling 26 can be moved in the axial direction of the output shaft 15a and the rotating shaft 13a by performing an operation to release the coupling. In other words, the coupling 26 can be in a connected state in which it straddles the output shaft 15a and the rotating shaft 13a and connects the output shaft 15a and the rotating shaft 13a to each other, or a released state in which it moves axially from the connected state and releases the connection between the output shaft 15a and the rotating shaft 13a. In the released state, the coupling 26 is, for example, detached from the rotating shaft 13a and positioned on the output shaft 15a.

[0036] When the coupling 26 is in the released state, it is possible to move the screw shaft 13 in the axial direction. Therefore, it is possible to move the screw shaft 13 so that the rotation axis 13a of the screw shaft 13 retracts from inside the junction box 18 into the barrel 19.

[0037] The junction box 18 is fastened to the housing 15b of the reducer 15 by fasteners 42. Therefore, by removing the fasteners 42, the junction box 18 is released from the housing 15b. The junction box 18 is also connected to the barrel 19 by fastening metal fittings 43 (see FIG. 3). Therefore, by removing the fastening metal fittings 43, the junction box 18 is released from the barrel 19.

[0038] As shown in FIGS. 2 and 3 , the junction box 18 has a reducer side wall 18a, a barrel side wall 18b, a ceiling wall 18c, and a bottom wall 18d, and is hollow. A coupling 26 is disposed in the space between the reducer side wall 18a, the barrel side wall 18b, the ceiling wall 18c, and the bottom wall 18d. The output shaft 15a of the reducer 15 and the rotating shaft 13a of the screw shaft 13 fit into this space. In this embodiment, the junction box 18 has walls (a left side wall 18e and a right side wall 18f (see FIG. 3 )) located on the sides, with the left and right directions when viewing the junction box 18 in the axial direction of the screw shaft 13 being defined as sides. However, the side walls (the left side wall 18e and the right side wall 18f) may be omitted.

[0039] The reducer sidewall 18a is a sidewall arranged along the side surface of the housing 15b of the reducer 15, and has a through-hole 18g (see FIG. 3) through which the output shaft 15a of the reducer 15 passes. The barrel sidewall 18b is a sidewall arranged along the base end surface of the barrel 19, and has a through-hole 18h (see FIG. 3) through which the rotation shaft 13a of the screw shaft 13 passes. The top wall 18c is arranged above the coupling 26 so as to connect the reducer sidewall 18a and the barrel sidewall 18b. The bottom wall 18d is arranged below the coupling 26 so as to connect the reducer sidewall 18a and the barrel sidewall 18b.

[0040] As shown in Figure 4, the left side wall 18e and the right side wall 18f each have an opening 18i through which the space inside the junction box 18 can be accessed. However, a cover 28 (see Figure 1) is removably attached to the left side wall 18e and the right side wall 18f so as to cover the opening 18i. The cover 28 has a mesh structure 28a in an area facing at least a portion of the coupling 26, and at least a portion of the coupling 26 can be observed from outside the junction box 18 through the mesh structure 28a.

[0041] The openings 18i in the left side wall 18e and the right side wall 18f have a vertical length longer than the vertical length of the coupling 26 and an axial length longer than the axial length of the coupling 26. The openings 18i are provided at positions that allow the coupling 26 to be removed. However, the size and position are not limited to these as long as the coupling 26 is not removed through the openings 18i.

[0042] The junction box 18 is made up of a plurality of body parts 30. That is, the junction box 18 is formed by combining the plurality of body parts 30. In this embodiment, the plurality of body parts 30 include a plate 30a that forms the barrel side wall 18b, an upper part 30b that forms the top wall 18c and the upper part of the reducer side wall 18a, and a lower part 30c that forms the bottom wall 18d and the lower part of the reducer side wall 18a. The upper part 30b also forms the upper part of the left side wall 18e and the upper part of the right side wall 18f, and the lower part 30c also forms the lower part of the left side wall 18e and the lower part of the right side wall 18f.

[0043] The plate 30a is a body part 30 that constitutes the barrel side wall 18b alone, and is joined to the barrel 19 by a fastening metal fitting 43. The plate 30a is made of a material that is harder than the other parts (the upper part 30b and the lower part 30c). For example, the plate 30a is hardened to impart high hardness. Therefore, when the plate 30a is joined to the barrel 19 by the fastening metal fitting 43, the fastening force of the plate 30a to the barrel 19 can be ensured.

[0044] Of the dividing surfaces 32 that form the boundaries between the body parts 30, dividing surface 32d that forms the boundary between the upper part 30b and the lower part 30c includes a first dividing surface 32a that crosses the through-hole 18g in the reducer side wall 18a and divides the reducer side wall 18a into upper and lower parts, as shown in Figures 4 and 5. Furthermore, dividing surface 32d that forms the boundary between the upper part 30b and the lower part 30c also includes a left dividing surface 32d1 in the left side wall 18e and a right dividing surface (not shown) in the right side wall 18f. If the left side wall 18e and the right side wall 18f are omitted, these left dividing surface and right dividing surface are also omitted.

[0045] Among the dividing surfaces 32 that form boundaries between the body parts 30, dividing surface 32e that forms the boundary between the plate 30a and the upper part 30b includes dividing surface 32e1 that divides the barrel side wall 18b from the top wall 18c, dividing surface 32e2 that divides the barrel side wall 18b from the upper part of the left side wall 18e, and dividing surface 32e2 (not shown) that divides the barrel side wall 18b from the upper part of the right side wall 18f. Dividing surface 32e1 that divides the barrel side wall 18b from the top wall 18c is an example of a second dividing surface 32b that divides one part of the barrel side wall 18b, the top wall 18c, and the bottom wall 18d from the other parts.

[0046] Among the dividing surfaces 32 that form boundaries between the body parts 30, dividing surface 32f that forms the boundary between the plate 30a and the lower part 30c includes dividing surface 32f1 that divides the barrel side wall 18b from the bottom wall 18d, dividing surface 32f2 that divides the barrel side wall 18b from the lower part of the left side wall 18e, and a dividing surface (not shown) that divides the barrel side wall 18b from the lower part of the right side wall 18f. Dividing surface 32f1 that divides the barrel side wall 18b from the bottom wall 18d is an example of a second dividing surface 32b that divides one part of the barrel side wall 18b, the top wall 18c, and the bottom wall 18d from the other parts.

[0047] The upper part 30b and the lower part 30c are detachable from the plate 30a by fasteners (e.g., bolts) not shown. The upper part 30b and the lower part 30c are detachable from the housing 15b of the reducer 15 by fasteners (e.g., bolts) 42. The upper part 30b and the lower part 30c are detachable from each other by fasteners (e.g., bolts) 44.

[0048] When the upper part 30b is removed from the plate 30a and the housing 15b of the reducer 15, the space within the junction box 18 is opened upward. This space has an axial length corresponding to the distance between the plate 30a and the reducer 15. Therefore, removing the upper part 30b opens up a space that allows the output shaft 15a of the reducer 15 to pass through. Furthermore, when the upper part 30b is removed, the upper portion of the reducer side wall 18a is removed, opening up the through-hole 18g upward. This makes it possible to move the output shaft 15a of the reducer 15 upward. Therefore, by removing, for example, the top two components 15c of the components 15c of the housing 15b of the reducer 15, the output shaft 15a of the reducer 15 can be removed upward.

[0049] The length of the junction box 18 in the axial direction is longer than the axial length of the coupling 26, and the distance between the plate 30a and the reducer 15 in the axial direction is also longer than the axial length of the coupling 26. Therefore, it is possible to remove the coupling 26 through the space that is opened by removing the upper part 30b.

[0050] To remove the coupling 26, the coupling 26 may be released (disengaged from the rotary shaft 13a of the screw shaft 13 and positioned on the output shaft 15a) and then removed together with the output shaft 15a. Alternatively, the coupling 26 may be released, and the screw shaft 13 may be moved so that the rotary shaft 13a retracts from inside the junction box 18 into the barrel 19, and then the coupling 26 may be removed from the output shaft 15a. In this case, the condition is that the distance between the plate 30a and the output shaft 15a of the reducer 15 must be longer than the axial length of the coupling 26.

[0051] As described above, in the continuous extruder 10 of this embodiment, the reducer side wall 18a of the junction box 18 is divided by the first dividing surface 32a that crosses the through hole 18g through which the output shaft 15a of the reducer 15 passes, and the top wall 18c and the bottom wall 18d are divided from the plate 30a by the second dividing surface 32b. Therefore, at least the upper part 30b constituting the reducer side wall 18a can be detached from the other body parts 30 (the plate 30a and the lower part 30c). By removing the upper part 30b, the output shaft 15a of the reducer 15 is no longer enclosed by the reducer side wall 18a, and the coupling 26 housed in the junction box 18 can be exposed. In this state, the coupling 26 can be operated to a released state in which the connection between the output shaft 15a of the reducer 15 and the rotation shaft 13a of the screw shaft 13 is released. Therefore, it is possible to move the output shaft 15a to the side opened by the upper part 30b (i.e., the upper side), which eliminates the need to retract the barrel 19 in the axial direction during maintenance of the reducer 15, thereby reducing the labor required for maintenance of the reducer 15. Furthermore, although the barrel 19 is made up of multiple barrel pieces 19a, it is not necessary to disassemble the barrel 19.

[0052] In addition, in this embodiment, the openings 18i in the left side wall 18e and the right side wall 18f of the junction box 18 are formed to a size that allows the coupling 26 to pass through, so that the coupling 26 can be removed from the junction box 18 through these openings 18i.

[0053] Furthermore, since the opening 18i is covered by the cover 28, even if the opening 18i is provided in the junction box 18, the coupling 26 is not directly exposed.

[0054] Furthermore, since the cover 28 is provided with a mesh structure 28a, at least a portion of the coupling 26 can be observed from outside the junction box 18 through the mesh structure 28a.

[0055] Furthermore, in this embodiment, the plate 30a is made of a material that is harder than the other body parts 30, thereby ensuring the fastening force of the plate 30a to the barrel 19. In other words, by making the hardness of the plate 30a higher than that of the other body parts 30 that are not fastened to the barrel 19, each body part 30 can be made of a material with a hardness appropriate for the function of that body part 30.

[0056] In this embodiment, the openings 18i are formed in parts of the left side wall 18e and the right side wall 18f, but this is not limiting. For example, the left side wall 18e and the right side wall 18f may be omitted, so that the side wall portions of the junction box 18 are open.

[0057] Furthermore, the size of the opening 18i in the left side wall 18e and the right side wall 18f is not limited to a size that allows the coupling 26 to pass through, but may be smaller than this, and the opening 18i may not be formed in the left side wall 18e and the right side wall 18f.

[0058] In addition, in this embodiment, the plate 30a is fastened to the barrel 19, so the plate 30a is hardened, but the present invention is not limited to this. Depending on the method for fastening the plate 30a to the barrel 19, the plate 30a may be made of a material having the same hardness as the other body parts 30.

[0059] (Second embodiment) In the first embodiment, the body parts 30 that make up the junction box 18 include a plate 30a that forms the barrel side wall 18b by itself, whereas in the second embodiment, such a plate 30a is not included. Note that the same components as in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0060] As shown in Fig. 6, in the second embodiment, the body parts 30 constituting the junction box 18 include an upper part 30b and a lower part 30c. The dividing surfaces 32 that define the boundaries between the body parts 30 include a first dividing surface 32a that crosses the through-hole 18g in the reducer side wall 18a and divides the reducer side wall 18a into upper and lower parts. The dividing surfaces 32 that define the boundaries between the body parts 30 also include a dividing surface 32d that divides the upper part of the barrel side wall 18b from the lower part of the barrel side wall 18b. This dividing surface 32d is an example of a second dividing surface 32b that divides one part of the barrel side wall 18b, the top wall 18c, and the bottom wall 18d from the other parts.

[0061] That is, the upper part 30b forms the upper part of the barrel side wall 18b, the ceiling wall 18c, and the upper part of the reducer side wall 18a. Meanwhile, the lower part 30c forms the lower part of the barrel side wall 18b, the bottom wall 18d, and the lower part of the reducer side wall 18a. Note that the upper part 30b may also form the upper part of the left side wall 18e and the upper part of the right side wall 18f, or may not form the upper part of the left side wall 18e and the upper part of the right side wall 18f. Furthermore, the lower part 30c may also form the lower part of the left side wall 18e and the lower part of the right side wall 18f, or may not form the lower part of the left side wall 18e and the lower part of the right side wall 18f.

[0062] The upper part 30b and the lower part 30c are detachable from the housing 15b of the reducer 15 by unillustrated fasteners (for example, bolts), and are detachable from the barrel 19 by unillustrated fasteners (for example, bolts). Furthermore, the upper part 30b and the lower part 30c are detachable from each other by unillustrated fasteners (for example, bolts).

[0063] In the second embodiment, when the upper part 30b is removed from the housing 15b, the lower part 30c, and the barrel 19 of the reducer 15, the space inside the junction box 18 is opened upward. This space is large enough to allow the output shaft 15a of the reducer 15 to pass through. Furthermore, when the upper part 30b is removed, the upper part of the reducer side wall 18a is removed, and the through-hole 18g is opened upward. Therefore, the output shaft 15a of the reducer 15 can be moved upward.

[0064] The second dividing surface 32b does not have to be configured to divide the upper part of the barrel side wall 18b from the lower part of the barrel side wall 18b. For example, as shown in FIG. 7, the second dividing surface 32b may be provided on the top wall 18c. In this case, the second dividing surface 32b divides a part of the top wall 18c (a part of the top wall 18c located on the reducer 15 side) from another part of the top wall 18c (a part of the top wall 18c located on the barrel 19 side). That is, the body parts 30 constituting the junction box 18 include a body part 30 integrally including a part of the top wall 18c (a part of the top wall 18c located on the reducer 15 side) and an upper part of the reducer side wall 18a. The space opened by removing the part of the top wall 18c (a part of the top wall 18c located on the reducer 15 side) needs to be large enough to allow the output shaft 15a of the reducer 15 to pass through. The body parts 30 constituting the junction box 18 also include body parts 30 that integrally include other parts of the ceiling wall 18c (the parts of the ceiling wall 18c that are located on the barrel 19 side), the barrel side walls 18b, the bottom wall 18d, and the lower part of the reducer side walls 18a.

[0065] As shown in FIG. 8, the second dividing surface 32b may be provided on the bottom wall 18d. In this case, the second dividing surface 32b divides a portion of the bottom wall 18d (a portion of the bottom wall 18d located on the reducer 15 side) into another portion of the bottom wall 18d (a portion of the bottom wall 18d located on the barrel 19 side). Therefore, the body parts 30 constituting the junction box 18 include a body part 30 integrally including the other portion of the bottom wall 18d (a portion of the bottom wall 18d located on the barrel 19 side), the barrel side wall 18b, the ceiling wall 18c, and an upper portion of the reducer side wall 18a. When this body part 30 is removed, a space large enough to allow the output shaft 15a of the reducer 15 to pass through is opened. The body parts 30 constituting the junction box 18 also include a body part 30 integrally including a portion of the bottom wall 18d (a portion of the bottom wall 18d located on the reducer 15 side) and a lower portion of the reducer side wall 18a.

[0066] In the junction box 18 of Figures 6 to 8, the coupling 26 can be removed from inside the junction box 18 by separating some of the body parts 30 from the other body parts 30, moving the coupling 26 onto the output shaft 15a of the reducer 15, and then moving the output shaft 15a upward.

[0067] Also, as will be described below, the coupling 26 can be removed after being detached from the output shaft 15a.

[0068] For example, to remove the coupling 26 from the junction box 18 divided by the dividing surface 32 (first dividing surface 32a and second dividing surface 32b) shown in Fig. 6, first, the upper part 30b and the lower part 30c of the junction box 18 are removed as shown in Fig. 9. At this time, the coupling 26 is in a connected state in which the output shaft 15a of the reducer 15 and the rotating shaft 13a of the screw shaft 13 are connected to each other. In this state, as shown in Fig. 10, a hoisting tool 35 is hung around the coupling 26, and the coupling 26 is supported in a suspended state from above.

[0069] Next, an operation for releasing the coupling 26 is performed so that the rotating shaft 13a of the screw shaft 13 is disengaged from the coupling 26, and then, as shown in FIG. 11, the screw shaft 13 is moved toward the tip side (left side in FIG. 11) so that the rotating shaft 13a of the screw shaft 13 is housed within the barrel 19. At this time, the axial length of the coupling 26 is shorter than the distance between the barrel 19 and the output shaft 15a of the reducer 15. Therefore, the coupling 26 is moved in the axial direction to remove it from the output shaft 15a, and then, as shown in FIG. 12, the coupling 26 can be removed by moving the coupling 26 in a direction perpendicular to the axial direction.

[0070] Note that even if openings 18i are not formed in the left side wall 18e and the right side wall 18f of the junction box 18, the coupling 26 can be removed using the suspender 35. For example, as shown in Fig. 13, first, the upper part 30b is removed to expose the coupling 26. At this time, the coupling 26 is in a connected state, and in this state, as shown in Fig. 14, the suspender 35 is hung around the coupling 26 to support the coupling 26 in a suspended state from above.

[0071] Next, an operation for releasing the coupling 26 is performed so that the rotating shaft 13a of the screw shaft 13 is disengaged from the coupling 26, and then, as shown in FIG. 15, the screw shaft 13 is moved toward the tip side (left side in FIG. 15) so that the rotating shaft 13a of the screw shaft 13 is housed within the barrel 19. At this time, the axial length of the coupling 26 is shorter than the distance between the barrel 19 and the output shaft 15a of the reducer 15. Therefore, the coupling 26 is moved in the axial direction to disengage it from the output shaft 15a, and then, as shown in FIG. 16, the coupling 26 can be removed by moving the coupling 26 in a direction perpendicular to the axial direction.

[0072] Although the description of other configurations, actions, and effects will be omitted, the description of the first embodiment can be applied to the second embodiment.

[0073] (Third embodiment) In the first and second embodiments, examples are shown in which the junction box 18 is divided into upper and lower halves, whereas in the third embodiment, the junction box 18 is divided into left and right halves, as shown in Figures 17 and 18. Figure 17 shows the junction box 18 as seen from above, and Figure 18 is a view of the reducer side wall 18a as seen in the axial direction. Note that the same components as those in the first and second embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0074] The dividing surfaces 32 that define the boundaries between the body parts 30 of the junction box 18 include a first dividing surface 32a that crosses the through-hole 18g in the reducer side wall 18a and divides the reducer side wall 18a into left and right halves. The dividing surfaces 32 that define the boundaries between the body parts 30 also include a dividing surface 32g that divides the barrel side wall 18b, the top wall 18c, and the bottom wall 18d into left and right halves. This dividing surface 32g is an example of a second dividing surface 32b that divides one portion of the barrel side wall 18b, the top wall 18c, and the bottom wall 18d from the other portions. The second dividing surface 32b extends in the axial direction, and its end on the reducer 15 side intersects with the first dividing surface 32a.

[0075] Even when the junction box 18 is divided into left and right halves, each body part 30 can be removed without moving the barrel 19.

[0076] Although the description of other configurations, actions, and effects will be omitted, the descriptions of the first and second embodiments can be applied to the third embodiment.

[0077] (Fourth embodiment) In the first to third embodiments, the dividing surface 32 of the body part 30 includes a first dividing surface 32a that divides the reducer side wall 18a into upper and lower parts while crossing the through-hole 18g of the reducer side wall 18a, whereas in the fourth embodiment, the first dividing surface 32a is not included, as shown in Fig. 19. Note that the same components as those in the first to third embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0078] In the fourth embodiment, the multiple body parts 30 that make up the junction box 18 include a reducer-side part 30d and other parts 30e that are body parts 30 other than the reducer-side part 30d. The reducer-side part 30d is a part that has a reducer side wall 18a in which a through hole 18g is formed, through which the output shaft 15a of the reducer 15 passes. The reducer-side part 30d is fixed to the housing 15b of the reducer 15 by a fastener (not shown), and is therefore detachable from the reducer 15.

[0079] The axial length of the reducer-side part 30d is shorter than the axial length of the gap between the barrel 19 and the output shaft 15a of the reducer 15. Therefore, although the through-hole 18g of the reducer side wall 18a is not divided by a dividing surface, the reducer-side part 30d can be removed through the gap between the barrel 19 and the output shaft 15a of the reducer 15. Furthermore, since the axial length of the coupling 26 is shorter than the axial length of the gap between the barrel 19 and the output shaft 15a of the reducer 15, the coupling 26 can be removed from the output shaft 15a.

[0080] The other part 30e is configured to be detachable from the barrel 19 and the reducer-side part 30d. The other part 30e is made up of multiple parts 30e1, 30e2. For example, as shown in FIG. 19, the other part 30e may be divided into two parts, upper and lower, or left and right. It may also be divided into three or more parts. When the other part 30e is divided in this way, the other part 30e can be removed even if the rotation axis 13a of the screw shaft 13 is not pulled into the barrel 19. Removing the other part 30e opens up the space between the barrel 19 and the reducer-side part 30d.

[0081] If an opening 18i for accessing the coupling 26 is provided in the left side wall 18e and the right side wall 18f of the junction box 18, the coupling 26 can be accessed before removing the other part 30e. That is, the coupling 26 can be changed from the connected state to the released state in the state shown in FIG. 19. The opening 18i may be formed in only a portion of the left side wall 18e and the right side wall 18f, or may be formed to cover the entire left side wall 18e and the right side wall 18f. The opening 18i can also be used to hang a hanger 35 on the coupling 26. However, if the coupling 26 is released after removing the other part 30e, the opening 18i may be omitted.

[0082] Furthermore, if the dividing surface 32h, which is the boundary between the reducer-side part 30d and the other part 30e, crosses the opening 18i, removing the other part 30e opens the opening 18i, allowing the suspender 35 that suspends the coupling 26 to come out of the opening 18i.

[0083] To remove the junction box 18, first remove the other parts 30e (30e1, 30e2). At this time, the coupling 26 may be in a released state and the rotating shaft 13a of the screw shaft 13 may be retracted into the barrel 19, or the rotating shaft 13a of the screw shaft 13 may be retracted into the barrel 19 after the other part 30e is removed.

[0084] Next, as shown in Fig. 20, the coupling 26 is supported from above by being suspended by a suspender 35. Then, as shown in Fig. 21, the coupling 26 is removed through the gap between the barrel 19 and the output shaft 15a of the reducer 15. After the coupling 26 is removed, the reducer-side part 30d is moved in the axial direction, and the reducer-side part 30d is removed through the gap between the barrel 19 and the output shaft 15a of the reducer 15.

[0085] The other part 30e does not have to be divided into upper and lower or left and right parts. For example, as shown in FIG. 22, the other part 30e may include multiple parts 30e1 and 30e2 arranged in the axial direction. In this case, each of the parts 30e1 and 30e2 constituting the other part 30e must have a wall portion 30f whose axial length is shorter than the gap between the barrel 19 and the output shaft 15a of the reducer 15. This is because each of the parts 30e1 and 30e2 must be removed so that this wall portion 30f passes through the gap between the barrel 19 and the output shaft 15a of the reducer 15. If the wall portion 30f has an axial length shorter than the gap between the barrel 19 and the coupling 26, each of the parts 30e1 and 30e2 can be removed without moving the coupling 26.

[0086] If the opening 18i is formed in the junction box 18, the suspender 35 can be hung on the coupling 26 before the other part 30e is removed.

[0087] As shown in Fig. 22, dividing surface 32i between parts 30e1 and 30e2 constituting other part 30e does not have to extend in a direction perpendicular to the axial direction. For example, as shown in Fig. 23, dividing surface 32i between parts 30e1 and 30e2 constituting other part 30e may be inclined with respect to the direction perpendicular to the axial direction. However, even in this case, each of parts 30e1 and 30e2 needs to have a wall portion 30f whose axial length is shorter than the gap between barrel 19 and output shaft 15a of reducer 15.

[0088] Although the description of other configurations, actions, and effects will be omitted, the descriptions of the first to third embodiments can be applied to the fourth embodiment.

[0089] (Fifth embodiment) 24, the fifth embodiment does not include a first dividing surface 32a that divides the reducer side wall 18a into upper and lower parts while crossing the through-hole 18g of the reducer side wall 18a, and the opening 18i of the junction box 18 is formed to a size that allows the coupling 26 to be removed. Note that the same components as those in the first to fourth embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0090] The opening 18i of the junction box 18 has a vertical length that is longer than the vertical length of the coupling 26, and an axial length that is longer than the axial length of the coupling 26. The opening 18i is located at a position that allows the coupling 26 to be removed from the side without interfering with the output shaft 15a. This allows the coupling 26 to be operated inside the junction box 18. In this case, if the rotation shaft 13a of the screw shaft 13 is pulled toward the barrel 19 while the reducer-side part 30d and the other part 30e are fixed, the coupling 26 can be removed through the opening 18i before the reducer-side part 30d and the other part 30e are removed.

[0091] In addition, the distance between the barrel 19 and the output shaft 15a of the reducer 15 is longer than the length of the reducer-side part 30d in the axial direction. Therefore, after the other part 30e is removed, the reducer-side part 30d can be removed through the gap between the barrel 19 and the output shaft 15a of the reducer 15.

[0092] The dividing surface 32h, which is the boundary between the reducer-side part 30d and the other part 30e, is not limited to the position shown in Figure 24. As long as the other part 30e can be removed when the rotating shaft 13a of the screw shaft 13 is retracted into the barrel 19 and the coupling 26 is removed, the dividing surface 32h, which is the boundary between the reducer-side part 30d and the other part 30e, may be formed at the position shown in Figures 25 and 26, for example.

[0093] Although a description of other configurations, actions, and effects will be omitted, the description of the first embodiment can be applied to the second embodiment.

[0094] (Sixth embodiment) In the fourth and fifth embodiments, the dividing surface 32h that forms the boundary between the reducer-side part 30d and the other part 30e crosses the opening 18i of the junction box 18. In contrast, in the sixth embodiment, as shown in Fig. 27, the dividing surface 32h that forms the boundary between the reducer-side part 30d and the other part 30e does not cross the opening 18i of the junction box 18. Note that the same components as those in the first to fifth embodiments are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0095] In the sixth embodiment, the opening 18i of the junction box 18 is provided in the other part 30e, which is a part other than the reducer-side part 30d, and is not separated by a dividing surface 32h that is the boundary between the reducer-side part 30d and the other part 30e. Therefore, when removing the coupling 26, it is necessary to simultaneously move the part 30e1 of the other part 30e in which the opening 18i is formed. Therefore, the opening 18i of the junction box 18 is formed to a size that allows the suspender 35 that suspends the coupling 26 to pass through. In other words, the opening 18i does not need to be large enough to allow the coupling 26 to pass through.

[0096] The other part 30e includes a part 30e1 in which the opening 18i is formed, and a part (barrel-side part) 30e2 located between this part 30e1 and the barrel 19. The barrel-side part 30e2 has a wall portion 30g whose axial length is shorter than the length between the barrel 19 and the coupling 26. This allows the wall portion 30g to pass through the gap between the barrel 19 and the coupling 26, allowing the barrel-side part 30e2 to be removed.

[0097] The part 30e1 having the opening 18i has a wall portion 30f whose axial length is shorter than the distance between the barrel 19 and the output shaft 15a of the reducer 15. As a result, when removing this part 30e1, it can be removed together with the coupling 26 through the gap between the barrel 19 and the output shaft 15a of the reducer 15. The axial length of the coupling 26 is shorter than the distance between the barrel 19 and the output shaft 15a of the reducer 15. The axial length of the reducer-side part 30d is also shorter than the distance between the barrel 19 and the output shaft 15a of the reducer 15. As a result, the reducer-side part 30d can also be removed through the gap between the barrel 19 and the output shaft 15a of the reducer 15.

[0098] Although the description of other configurations, actions, and effects will be omitted, the description of the first embodiment can be applied to the second embodiment.

[0099] (Other embodiments) It should be noted that the embodiments disclosed herein are illustrative in all respects and should not be considered limiting. The present invention is not limited to the above-described embodiments, and various modifications and improvements are possible without departing from the spirit of the present invention. For example, in the first to sixth embodiments, the junction box 18 is composed of two or three body parts 30, but is not limited to this configuration. For example, these body parts 30 may be further divided, and the junction box 18 may be composed of four or more body parts 30.

[0100] The dividing line does not have to be straight, but may be curved, or may be a line that bends midway.Furthermore, the dividing line does not have to extend parallel to or perpendicular to the axial direction, but may extend in an oblique direction. [Explanation of symbols]

[0101] 10: Continuous extruder 13: Screw shaft 13a: Rotation axis 14: Drive motor 15: Reducer 15a: Output shaft 18: Junction box 18a: Reducer side wall 18b: Barrel side wall 18c: Ceiling wall 18d:Bottom wall 18g:Through hole 18i :Aperture 19: Barrel 26: Coupling 28: Cover 28a: Mesh structure 30: Body Parts 30a: Plate 30b: Upper parts 30c: Lower parts 30d: Reducer side parts 30e: Other parts 30f: wall 30g: wall 32: Split plane 32a: 1st dividing plane 32b: 2nd dividing plane

Claims

1. A drive motor; a reducer having an output shaft and reducing the rotation speed of the output shaft relative to the rotation speed of the drive motor; a screw shaft having a rotation axis; a barrel for storing the screw shaft; a coupling for connecting the output shaft of the reducer and the rotation shaft of the screw shaft to each other; a junction box having at least a reducer side wall, a barrel side wall, a ceiling wall, and a bottom wall, the junction box being disposed between the reducer and the barrel while housing the coupling; Equipped with the coupling is configured to be capable of assuming a connected state in which the output shaft and the rotating shaft are connected to each other, and a released state in which the connection between the output shaft and the rotating shaft is released, the reducer side wall has a through hole through which the output shaft of the reducer passes, the junction box has a plurality of divided body parts, a first dividing surface that divides the reducer side wall while crossing the through hole, and a second dividing surface that divides a portion of the barrel side wall, the top wall, and the bottom wall from the other portions.

2. 2. The continuous extruder according to claim 1, wherein some of the plurality of body parts are formed in a shape that, when separated from the other body parts at the first dividing surface and the second dividing surface, opens a space through which the output shaft can pass.

3. The screw shaft is axially movable, 2. The continuous extruder according to claim 1, wherein a length from the barrel side wall of the junction box to a tip of the output shaft in an axial direction of the output shaft or the rotation shaft is longer than a length of the coupling in the axial direction.

4. When the left-right direction when the junction box is viewed in the axial direction of the screw shaft is defined as a side, the junction box has a structure in which the side wall portion is open or an opening is formed in a part of the side wall portion, 4. The continuous extruder according to claim 3, wherein the opening has a vertical length longer than the vertical length of the coupling, an axial length longer than the axial length of the coupling, and is provided at a position that allows the coupling to be removed from the side.

5. The continuous extruder according to claim 4 , wherein the junction box further comprises a cover that covers the opening.

6. 6. The continuous extruder according to claim 5, wherein the cover has a mesh structure in an area facing at least a portion of the coupling.

7. the plurality of body parts constituting the junction box include a plate that is formed as a separate member from one or more body parts constituting the ceiling wall and the bottom wall and that forms the barrel side wall as a single unit; 2. The continuous extruder according to claim 1, wherein the plate is made of a material harder than one or more body parts constituting the top wall and the bottom wall, and is connected to the barrel.

8. A drive motor; A reducer, a reducer having an output shaft and reducing the rotation speed of the output shaft relative to the rotation speed of the drive motor; a screw shaft having a rotation axis; a barrel for storing the screw shaft; a coupling for connecting the output shaft of the reducer and the rotation shaft of the screw shaft to each other; a junction box that houses the coupling and is disposed between the reducer and the barrel; Equipped with the coupling is configured to be capable of assuming a connected state in which the output shaft and the rotating shaft are connected to each other, and a released state in which the output shaft and the rotating shaft are released from the connection and detached from the output shaft, The junction box is configured by combining a plurality of divided body parts, the plurality of body parts include a reducer side part that has a reducer side wall formed with a through hole through which the output shaft of the reducer passes and is detachable from the reducer, the other part, which is a body part other than the reducer side part, is disposed between the reducer side part and the barrel and is detachable from the reducer side part and the barrel; A continuous extruder, wherein the axial length of the coupling is shorter than the gap between the barrel and the output shaft of the reducer, and the axial length of the reducer side part is shorter than the gap between the barrel and the output shaft.

9. When the left-right direction when the junction box is viewed from the axial direction of the screw shaft is defined as a side, the junction box has a structure in which the side wall portion is open or an opening is formed in a part of the side wall portion, the other part has a wall portion whose axial length is shorter than the length between the barrel and the coupling, The continuous extruder according to claim 8 , wherein a dividing surface that is a boundary between the reducer-side part and the other part crosses the opening.

10. When the left-right direction when the junction box is viewed from the axial direction of the screw shaft is defined as a side, the junction box has a structure in which the side wall portion is open or an opening is formed in a part of the side wall portion, The vertical length of the opening is longer than the vertical length of the coupling, and the axial length of the opening is longer than the axial length of the coupling, 9. The continuous extruder according to claim 8, wherein the opening is provided at a position that allows the coupling to be removed from the side.

Images