JP3884416B2 - Power window device mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mounting structure for a power window device.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a power window device mounting structure, a drive unit having a motor, a speed reduction mechanism, and the like constituting a power window device is disposed on one side surface (vehicle inner surface) side of an inner panel constituting an automobile door. The cable connected to the window panel (window glass) is wound on the other side surface (the vehicle outer surface) side of the inner panel, and the rotating drum wound so as to be fed out and the driven unit containing the rotating drum are fixed. (For example, refer to Patent Document 1).
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-199236
[Problems to be solved by the invention]
However, in the conventional power window device mounting structure as described above, the drum case in the driven unit is usually fixed to the inner panel by three bolts around the area where the rotating drum is accommodated. The vicinity of the provided cable insertion portion is not fixed to the inner panel. Therefore, particularly when a large load is applied to the cable insertion portion, such as when a cable is wound around a rotating drum, the cable insertion portion may be deformed.
[0005]
The present invention provides a mounting structure for a power window device capable of preventing deformation of a cable insertion portion of a drum case fixed to a panel in view of the above-described problems of the prior art. It is an object.
[0006]
[Means for Solving the Problems]
According to the present invention, the above problem is solved as follows.
(1) a driven unit with a rotating drum and the drum casing made of synthetic resin for rotatably accommodating the rotary drum cable connected to the window panel is wound up and delivery can be wound, a part of the door In the mounting structure of the power window device in which the driven unit is disposed on a panel constituting the drum, the drum case includes a bottomed cylindrical drum housing portion that rotatably accommodates the rotating drum, and a drum housing portion. A cylindrical cable insertion portion that extends from the outer peripheral surface in the cable movement direction by a predetermined length and through which the cable is movably inserted, and the periphery of the drum housing portion is fixed to the panel by a plurality of bolts And the vicinity of the both sides of the longitudinal direction of the said cable insertion part is fixed to the said panel by an engagement means.
[0007]
(2) In the above (1) term, the engaging means for securing one side of the cable insertion section, to fasten the fixed portion provided on the periphery of the drum housing portion in the drum casing on the panel wherein the bolt for and also the engaging means for securing the other side, the engaging portion provided on engagable the panel engaged portion provided in the drum casing.
[0008]
(3) In the above (1) or (2) term, in a region between the fixed portion and the cable insertion portion in the drum casing, providing the reinforcing portion for reinforcing a side portion of the cable insertion section.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1 is a perspective view of a door (D) to which the present invention is applied, FIG. 2 is an exploded perspective view of the door (D), and FIG. 3 is a side view of the module base (6) as viewed from the inside of the vehicle. 4 is a side view of the module base (6) when viewed from the outside of the vehicle, FIG. 5 is an enlarged side view of the main part when the module base (6) is viewed from the outside of the vehicle, and FIG. It is a disassembled perspective view of the principal part at the time of seeing a module base (6) from the vehicle outer side.
In the following description, the right side in FIGS. 1 to 3 is “front”, the left is “rear”, the front side of the page is “inside the vehicle”, and the back side of the page is “outside”.
[0010]
The door (D) of the present embodiment according to the present invention is a front door of an automobile that has a pair of upper and lower door hinges (not shown) and whose front end is pivotally attached to the vehicle body so as to be openable and closable. The outer panel (1) made of steel and the inner panel (2) made of a steel plate that forms the inside of the car and has an opening (2a) (shown in FIG. 2) in the center, excluding the upper edge of each other A box-shaped door body (3) is formed by hemming and spot welding of the glass, and a window panel (window glass) (4) is formed on the inner side of the inner panel (2) via a cable (11) described later. It is constructed by assembling a module base (6) forming a synthetic resin panel constituting a part of an inner panel (2) in which a power window device (5) for raising and lowering the door is assembled in advance.
[0011]
As shown in FIG. 4, as shown in FIG. 4, ascending / descending locus of the window panel (4) is provided on the front and rear portions of the module base (6) facing the vehicle outer side (side facing the outer panel (1)). A pair of front and rear guide rails (10) and (10) facing the up and down direction are fixed. The lower part of the window panel (4) is a carrier plate (10a) fitted to the guide rail (10) (10) so as to be slidable in the vertical direction after the module base (6) is assembled to the inner panel (2). Connected to (10a).
[0012]
As shown mainly in FIG. 4, the cable (11) includes upper and lower end portions of the front and rear guide rails (10) and (10) and a cable insertion portion (92a of a drum case (92) in a driven unit (9) described later). ) (92a) is slidably inserted into a bendable outer cylinder (11a) that connects to the carrier plate (10a) (10a) ( Linked to 10a). End portions of the outer cylinders (11a) and (11a) connected to the cable insertion portions (92a) and (92a) are mainly composed of compression springs (12) and (12) as shown in FIGS. A known cable slack absorbing means is fitted to the cable insertion portions (92a) and (92a) so as to be slidable by a predetermined distance along the feeding direction of the cables (11) and (11).
[0013]
The module base (6) has a bolt (7) inserted into each of a plurality of mounting holes (6a) provided in the vicinity of the outer periphery, and the bolt (7) is placed around the opening (2a) in the inner panel (2). By screwing and fastening to the provided female thread portion (2b), the opening (2a) is closed and fixed to the inner panel (2).
[0014]
The power window device (5) is disposed on the side surface (61) side facing the vehicle interior side of the module base (6) and on the other side surface (62) side of the module base (6). And a driven unit (9).
[0015]
The central portion of the module base (6), that is, the mounting portion on which the drive unit (8) and the driven unit (9) of the power window device (5) are disposed, as shown mainly in FIGS. A circular communication hole (63) is provided for enabling the connection between the unit (8) and the driven unit (9).
[0016]
Around the connection hole (63) on the one side surface (61) side of the module base (6), the rigidity around the connection hole (63) in the module base (6) is mainly shown in FIGS. In order to improve this, an inner annular protrusion (64) protruding toward the vehicle inner side and an outer annular protrusion (65) having a diameter larger than that of the annular protrusion (64) are provided. That is, around the connection hole (63) in the module base (6), multiple annular protrusions are provided inside and outside.
[0017]
A plurality of notched relief portions (64a) and (65a) are provided at the projecting ends of the inner and outer annular projections (64) and (65). The escape portions (64a) and (65a) are provided at positions corresponding to a plurality of protrusions (82c) provided on the facing surface (82a) side of the gear case (82) described later.
It is desirable that the relief portions (64a) and (65a) have the same inclination angle as the protrusions (82c) and are formed at regular intervals.
[0018]
Around the outer annular protrusion (65), there are three mounting holes (through which bolts (13) for fixing a gear case (82) and a drum case (92), which will be described later, to the module base (6) are inserted. 66). Of the three mounting holes (66), on the other side (62) side of the module base (6) behind the mounting holes (66) and (66) provided above and below the outer annular projection (65), As shown in FIG. 6, the engaging portion protrudes outward from the vehicle and is engageable with the upper and lower through holes (92e) and (92e) forming the engaged portion (or engaging means) of the drum case (92) described later. Upper and lower protrusions (69) and (69) forming (or engaging means) are provided.
[0019]
The annular protrusion provided on the one side surface (61) side of the module base (6) may be provided on either the inner or outer annular protrusions (64) or (65), or may be triple or more. good. The annular protrusions (64) and (65) may be formed into an annular shape by combining a plurality of arc-shaped protrusions. Furthermore, the module base (6) may be made of metal other than the synthetic resin, for example, or may be integrated with the inner panel (2).
[0020]
The drive unit (8) includes a motor (81) capable of rotating in the forward and reverse directions, and a motor (81), and a speed reduction mechanism (not shown) capable of decelerating and outputting the rotation of the motor (81). A metal gear case (82) fixed to one side (61) side of the module base (6) by a bolt (13).
[0021]
From the center of the opposing surface (82a) facing the one side surface (61) of the module base (6) in the gear case (82), a prismatic output shaft (83) that forms a part of the speed reduction mechanism protrudes. . The output shaft (83) passes through the connection hole (63) of the module base (6), protrudes toward the other side surface (62) of the module base (6), and is connected to a rotating drum (91) described later.
[0022]
On the opposite surface (82a) side of the gear case (82), as shown mainly in FIG. 6, in order to increase the rigidity of the gear case (82), an annular protrusion (82b) centering on the output shaft (83) A plurality of protrusions (82c) extending in the centrifugal direction from the outer periphery of the protrusion (82b) and an internal thread portion (82d) forming internal thread means corresponding to the mounting hole (66) of the module base (6) are formed 3 A number of fixing portions (82e) are provided.
[0023]
The outer diameter of the annular protrusion (82b) in the gear case (82) is smaller than the inner diameter of the annular protrusion (64) inside the module base (6), and the protrusion amount is also the same as the module base (6). It is set slightly larger than the protruding amount of the inner and outer annular protrusions (64) and (65). Therefore, in the state where the gear case (82) is fixed to the one side surface (61) side of the module base (6), as shown mainly in FIGS. 7 and 9, the protruding end of the annular protrusion (82b) Abutting around the connecting hole (63) on one side (61) side of the base (6), the projecting end of the inner and outer annular projections (64) (65) and the opposing surface (82a) of the gear case (82) A substantially uniform gap is formed between the clearances 64a and 65a and the protrusions 82c. The plurality of protrusions (82c) are adapted to face the plurality of relief portions (64a) (65a).
[0024]
The region including the annular protrusions (64), (65) around the communication hole (63) on one side surface (61) side of the module base (6), and the protrusions (82c) on the opposing surface (82a) of the gear case (82) The rainwater that has entered from the upper end of the door body (3) is located between the side surface (61) side of the module base (6) and the other side surface (62) side. An annular seal member (15) formed of an elastic material such as elastically deformable soft rubber or foam material is provided so as not to enter the indoor side.
[0025]
As shown mainly in FIGS. 7 and 9, the seal member (15) includes a projecting end of inner and outer annular projections (64) and (65) on one side (61) side of the module base (6) and a gear case (82). ) Between the opposing surface (82a) and between the escape portion (64a) (65a) and the protrusion (82c), and the outer periphery of the annular protrusion (82b) and the inner annular protrusion ( 64) and between the inner annular protrusion (64) and the outer annular protrusion (65).
The seal member (15) can obtain a significant shielding effect only by being superposed on at least one of the inner and outer annular protrusions (64) and (65).
[0026]
Thereby, even if the opposing surface (82a) of the gear case (82) has an uneven shape provided with a plurality of protrusions (82c), the seal member (15) is attached to the module base (6 ) Can be brought into close contact with the periphery of the communication hole (63) on one side (61) side and the opposing surface of the gear case (82), so that a reliable shielding effect can be obtained, and the drive unit (8) It is possible to reliably prevent rainwater or the like from adhering to the motor (81).
[0027]
In the present embodiment described above, a plurality of protrusions (82c) for increasing rigidity are provided on the facing surface (82a) side of the gear case (82), and the annular protrusions (64) inside and outside the module base (6) are provided. ) (65) The relief part corresponding to the protrusion (82c) is provided with (64a) (65a), but instead, the protrusion on the facing surface (82a) side of the gear case (82) (82c) may not be provided, that is, the opposing surface (82a) may have a flat shape. In this case, it is not necessary to provide relief portions (64a) (65a) in the inner and outer annular projections (64) (65). In this configuration, the sealing member (15) is brought into intimate contact between the inner and outer annular protrusions (64) and (65) and the facing surface (82a) of the gear case (82), and a reliable shielding effect is obtained.
[0028]
The driven unit (9) is rotatably accommodated in the drum case (92) made of synthetic resin and fixed to the other side (62) side of the module base (6) by the bolt (13). And a rotating drum 91 (shown in FIG. 7) wound around the cable 11 connected to the window panel 4 through the carrier plates 10a and 10a. Have. The rotating drum (91) is connected to the output shaft (83) on the side of the drive unit (8) protruding from the communication hole (63) of the module base (6), so that the rotating drum (91) rotates together with the output shaft (83). It can move.
[0029]
When the rotating drum (91) is rotated in a predetermined direction by the rotation of the motor (81) of the drive unit (8), the cable (11) is wound around the rotating drum (91), thereby the window panel (4). Is opened and closed along the guide rails (10) and (10).
[0030]
Drum casing (92), a bottomed circular cylindrical drum accommodating portion for rotatably accommodating the rotary drum (91) and (92b), provided continuously to the outer circumferential surface of the rear side of the drum housing portion (92b), the cable (11) has a pair of cylindrical upper and lower cable insertion portions (92a) and (92a) that are movably inserted in the vertical direction. The cable insertion portions (92a) and (92a) have a predetermined length in the vertical direction , that is, the longitudinal direction, which is the moving direction of the cable (11).
[0031]
Further, around the drum housing portion (92b) of the drum case (92), there are mounting holes (92d) corresponding to the mounting holes (66) of the module base (6) and the female screw portions (82d) of the gear case (82). There are provided three fixing portions (92c) in which are formed. Furthermore, on the rear (side) in the vicinity of the cable insertion portions (92a) and (92a), the upper and lower protrusions (69) and (69) forming the engaging portion (or engaging means) of the module base (6). Upper and lower through-holes (92e) and (92e) that constitute engaged portions (or engaging means) that can be engaged with each other are provided. Of the three mounting holes (92d), the mounting hole (92d) provided above the drum housing (92b) is located in front of the upper cable insertion portion (92a) (one side), Similarly, the mounting hole (92d) provided below the drum housing portion (92b) is positioned in front of (on one side of) the vicinity of the lower cable insertion portion (92a).
[0032]
The lower through hole (92e) of the upper and lower through holes (92e) and (92e) has a lower protrusion (69) than the upper and lower protrusions (69) and (69) of the module base (6). The module base (6) is tightly fitted along the other side surface (62) of the module base (6), and the upper through hole (92e) is also formed on the upper protrusion (69) in the vertical direction (downward). The drum case (92) around the fitting portion between the projection (69) on the side and the through hole (92e) is loosely fitted to the center (in a direction to prevent rotation).
[0033]
Thereby, even if an error occurs in the dimensional accuracy between the upper and lower through holes (92e) (92e) or the dimensional accuracy between the upper and lower protrusions (69) (69), the through hole (92e) ( 92e) can be easily fitted to the protrusions (69) and (69).
[0034]
In addition, since a plurality (two in this embodiment) of the through holes (92e) and the protrusions (69) are fitted with each other, the heat shrinkage of the module base (6) or the drum case (92) made of synthetic resin. Even if the fastening force of the bolt (13) for fixing the drum case (92) to the other side surface (62) of the module base (6) decreases due to the influence of the above, etc., the module base ( 6) The drum case (92) can be stably fixed to the module base (6) by preventing displacement in the direction along the other side surface (62).
[0035]
When assembling the drum case (92) to the module base (6), the through holes (92e) and (92e) of the drum case (92) are fitted into the protrusions (69) and (69) of the module base (6). Thus, the drum case (92) can be easily and reliably positioned with respect to the module base (6).
[0036]
In the present embodiment, the through holes (92e) (92e) are provided in the drum case (92), so that when the drum case (92) is positioned with respect to the module base (6), the through holes (92e ) (92e), the position of the protrusions (69) (69) can be visually confirmed, so that the through holes (92e) (92e) can be easily and reliably fitted to the protrusions (69) (69). Efficiency can be improved.
[0037]
Further, after the drum case (92) is fixed to the module base (6), the through hole (92e) is fitted to the protrusion (69) in the vicinity of the cable insertion portion (92a). Since the load acting on the insertion portion (92a) can be received at the fitting portion between the through hole (92e) and the protrusion (69), deformation of the cable insertion portion (92a) can be prevented.
[0038]
Note that the protrusion (69) forming the engaging portion (or engaging means) and the through hole (92e) forming the engaged portion (engaging means) are not limited to the above-described configuration. For example, instead of the above-described configuration, a protruding portion that forms an engaging portion (or engaging means) is provided on the drum case (92) side, and an engaged portion (or engaging means) that can be fitted to the protruding portion is provided. A through hole or a recess formed may be provided on the module base (6) side. Further, one protrusion and one through hole are provided on the module base (6), and the through hole and the protrusion that can be fitted to the protrusion and the through hole of the module base (6) on the drum case (92) side, respectively. May be provided one by one. Furthermore, the engaging portion (or engaging means) may be a through hole, and the engaged portion (or engaging means) may be a protrusion, or the engaging portion (or engaging means) and the engaged portion may be engaged. The part (or engagement means) may be provided at another position, or the number may be three or more.
[0039]
The mounting hole (92d) provided in each fixing portion (92c) of the drum case (92) has a predetermined length in the axial direction and has sufficient strength against the compressive force in the length direction. A metal cylindrical member (14) is fitted or press-fitted. As shown in FIG. 8, the length of the cylindrical member (14) is longer than the thickness dimension (a) of the fixed portion (92c) in the drum case (92), and the thickness dimension (a) and the module base ( 6) is set slightly shorter than the sum of the thickness (b). The outer diameter of the cylindrical member (14) is set to be equal to or slightly smaller than the inner diameter of the mounting hole (66) of the module base (6). As a result, the cylindrical member (14) protrudes from the mounting hole (92d) toward the module base (6) while being pressed into the mounting hole (92d) of the drum case (92), and the protruding portion. The protrusions are fitted into the mounting holes (66) of the module base (6).
[0040]
As described above, the drum case (92) has the upper and lower through holes (92e) and (92e) provided in the vicinity of the upper and lower cable insertion portions (92a) and (92a) in the vicinity (the other side) of the module base. Each cylindrical member (6) is fitted into the upper and lower protrusions (69) and (69) and press-fitted into the mounting hole (92d) of the drum case (92) as shown in FIGS. The projecting ends of 14) are fitted into the mounting holes (66) of the module base (6). As a result, the drum case (92) is fitted into the projecting end of the cylindrical member (14) and the mounting hole (66) of the module base (6) in addition to the fitting of the through hole (92e) and the protrusion (69). Is securely positioned with respect to the module base (6).
[0041]
With the protruding portion of the cylindrical member (14) fitted in each mounting hole (66) of the module base (6), the bolt (13) is attached to the cylindrical member (14) at one end (module base (6) It is inserted from the other side surface (62 side), and is screwed into an internal thread portion (82d) provided on the gear case (82) fixed to the one side surface (61) side of the module base (6). Thus, the periphery of the mounting hole (92d) in the fixing portion (92c) of the drum case (92) made of synthetic resin and the periphery of the mounting hole (66) in the module base (6) are the length of the cylindrical member (14). After compression in the thickness direction by an amount set shorter than the sum of the thickness dimensions (a) and (b), one end of the cylindrical member (14) is placed on the head of the bolt (13) and the other. The end abuts against the end surface of the fixing portion (82e) forming the female screw means having the female screw portion (82d) in the metal gear case (82). Accordingly, the drum case (92) can be securely fixed to the module base (6) without unnecessarily deforming the fastening portion of the synthetic resin drum case (92) and the module base (6). The fastening force of the bolt (13) is not reduced by the influence of heat shrinkage or the like after fastening.
[0042]
The female screw means may be formed separately from the gear case (82) without being provided in the gear case (82), or may be a general nut.
[0043]
When the drum case (92) is fixed to the other side (62) of the module base (6), the drum case (92) is positioned in front of the upper and lower cable insertion portions (92a) (92a) (on one side). ) by engagement of the bolt (13) (13) forming the engaging means, also as with the rear (the other side) through holes constituting the engaging means (92e) and projections (69), in other words Then The upper and lower cable insertion portions (92a) and (92a) in the vicinity of both sides in the vertical direction (longitudinal direction) are connected to the module base ( 6 ) by bolts (13) and (13) and protrusions (69) forming engagement means. because it is secured to, even if a large load on the cable insertion portion (92a) is applied, it is possible to reliably prevent the deformation of the cable insertion portion (92a), it is possible to improve the strength.
[0044]
Also, among the three fixing portions (92c) of the drum case (92), the fixing portion (92c) provided in the front (one side) near the upper and lower cable insertion portions (92a) (92a) and the cable insertion As shown in FIG. 8, mainly in the area between the parts (92a) and (92a), other areas are used to reinforce the front parts (side parts) of the upper and lower cable insertion parts (92a) and (92a). A thicker reinforcing portion (92f) is provided.
[0045]
In addition, a plurality of reinforcing pieces (92g) for reinforcing the rear portions of the cable insertion portions (92a) and (92a) are connected to the rear portions (side portions) of the upper and lower cable insertion portions (92a) and (92a). Yes. This reinforcing piece (92g) is provided above and below each through hole (92e) (92e). Thereby, the front part and the rear part (both sides) of the cable insertion part (92a) (92a) are reinforced, and the deformation of the cable insertion part (92a) (92a) is more reliably prevented with the minimum necessary material. Can do.
[0046]
【The invention's effect】
According to the present invention, the following effects can be achieved.
(A) According to the invention described in claim 1, since both sides in the vicinity of the cable insertion portion are fixed to the panel, even if a large load acts on the cable insertion portion of the drum case, the cable insertion portion is deformed. Can be prevented.
[0047]
(B) According to the invention described in claim 2, in addition to the effect of the invention according to claim 1, the both sides of the cable insertion portion can be connected to the both sides of the cable insertion portion without increasing the number of bolts for fastening the drum case to the panel more than necessary. Can be fixed to the panel.
[0048]
(C) According to the invention of claim 3, in addition to the effect of the invention according to claim 1 or 2, since the side part of the cable insertion part is reinforced, the deformation of the cable insertion part can be more reliably prevented. Can do.
[Brief description of the drawings]
FIG. 1 is a perspective view of a door to which the present invention is applied.
FIG. 2 is an exploded perspective view of the door.
FIG. 3 is a side view of the module base when viewed from the inside of the vehicle.
FIG. 4 is a side view of the module base as seen from the outside of the vehicle.
FIG. 5 is an enlarged side view of the main part when the module base is viewed from the outside of the vehicle.
FIG. 6 is an exploded perspective view of essential parts when viewed from the outside of the vehicle.
7 is a transverse sectional view taken along line VII-VII in FIG.
8 is an enlarged cross-sectional view taken along line VIII-VIII in FIG.
FIG. 9 is an enlarged view of the IX portion in FIG. 7;
FIG. 10 is an enlarged perspective view of a main part when the module base is viewed from the inside of the vehicle.
[Explanation of symbols]
(D) Door
(1) Outer panel
(2) Inner panel
(2a) Opening
(2b) Female thread
(3) Door body
(4) Window panel (window glass)
(5) Power window device
(6) Module base (panel)
(6a) Mounting hole
(61) One side of module base
(62) The other side of the module base
(63) Communication hole
(64) Inner annular projection
(64a) relief
(65) Outer annular projection
(65a) Escape part
(66) Mounting hole
(69) Projection (engagement part, engagement means)
(7) Bolt
(8) Drive unit
(81) Motor
(82) Gear case
(82a) Opposite surface
(82b) Annular protrusion
(82c) Projection
(82d) Female thread (Female thread means)
(82e) Fixed part (female thread means)
(83) Output shaft
(9) Drive unit
(91) Rotating drum
(92) Drum case
(92a) Cable insertion part
(92b) Drum housing
(92c) Fixed part
(92d) Mounting hole
(92e) Through hole (engaged part, engaging means)
(92f) Reinforcement part
(92g) Reinforcement piece
(10) Guide rail
(10a) Carrier plate
(11) Cable
(11a) Outer cylinder
(12) Compression spring
(13) Bolt (engagement means)
(14) Cylindrical member
(15) Seal member

Claims (3)

A driven unit with a synthetic resin drum case for rotatably accommodating the rotary drum and the rotary drum cable connected to the window panel is wound up and delivery can be wound, and constitute a part of the door In the mounting structure of the power window device in which the driven unit is disposed on the panel,
The drum case has a bottomed cylindrical drum housing portion that rotatably accommodates the rotating drum, and a predetermined length extending from an outer peripheral surface of the drum housing portion in the moving direction of the cable, so that the cable moves. A cylindrical cable insertion portion that can be inserted, and the periphery of the drum housing portion is fixed to the panel with a plurality of bolts, and the vicinity of both sides in the longitudinal direction of the cable insertion portion is A mounting structure of a power window device characterized by being fixed to a panel. Said engaging means for fixing one side of the cable insertion portion, a fixing portion provided on the periphery of the drum housing portion in the drum casing and the bolt for fastening to the panel, also likewise other The power window device mounting structure according to claim 1, wherein the engaging means for fixing the side is an engaging portion provided on the panel that can be engaged with an engaged portion provided on the drum case. Region, the power window device of the reinforcing portion and the provided claims 1 or 2, wherein for reinforcing a side portion of the cable insertion portion between the fixed portion and the cable insertion portion in the drum casing.

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