阅读说明：本技术 乘客输送机的控制盘和乘客输送机的控制盘的维护检修方法 (Control panel for passenger conveyor and maintenance and repair method for control panel for passenger conveyor ) 是由 林优次 于 2018-08-22 设计创作，主要内容包括：乘客输送机的控制盘具备：框架；控制盘主体,其具有以能够拉出的方式收纳于框架的控制单元；以及电缆体,其安装于控制单元,电缆体具有将控制单元与连接对象设备电连接的连接电缆,电缆体相对于控制单元的安装状态能够在第1安装状态和第2安装状态之间进行选择,在该第1安装状态下,控制单元经由连接电缆与连接对象设备电连接,在该第2安装状态下,电缆体从连接对象设备分离,电缆体相对于控制单元的位置在第1安装状态和第2安装状态下互不相同。第2安装状态时的电缆体成为用于将控制单元从框架拉出的把持部。(A control panel for a passenger conveyor is provided with: a frame; a control panel main body having a control unit which is housed in the frame in a drawable manner; and a cable body attached to the control unit, the cable body having a connection cable for electrically connecting the control unit and the connection target device, wherein an attachment state of the cable body to the control unit is selectable between a 1 st attachment state in which the control unit is electrically connected to the connection target device via the connection cable and a 2 nd attachment state in which the cable body is separated from the connection target device, and positions of the cable body to the control unit are different from each other in the 1 st attachment state and the 2 nd attachment state. The cable body in the 2 nd attached state serves as a grip portion for pulling out the control unit from the frame.)

1. A control panel for a passenger conveyor, comprising:

a frame;

a control panel main body having a control unit which is housed in the frame in a drawable manner; and

a cable body mounted to the control unit,

the cable body has a connection cable for electrically connecting the control unit and a connection target device,

the state of attachment of the cable body to the control unit is selectable between a 1 st state of attachment in which the control unit is electrically connected to the connection target device via the connection cable and a 2 nd state of attachment in which the cable body is separated from the connection target device,

the positions of the cable bodies with respect to the control unit are different from each other in the 1 st installation state and the 2 nd installation state,

the cable body in the 2 nd attached state serves as a grip portion for pulling out the control unit from the frame.

2. Control panel of a passenger conveyor according to claim 1,

the control panel main body is provided with other control units which can be drawn out and accommodated in the frame,

the other control unit is the connection object apparatus.

3. Control panel of a passenger conveyor according to claim 1 or 2,

the cable body has a cover member that houses the connection cable.

4. Control panel of a passenger conveyor according to any of claims 1 to 3,

the cable body has a 1 st end and a 2 nd end,

a 1 st mounting part and a 2 nd mounting part are provided in the control unit, the 1 st end part is mounted to the 1 st mounting part in the 2 nd mounting state, the 2 nd end part is mounted to the 2 nd mounting part in the 2 nd mounting state,

the 1 st mounting part also serves as a connecting part for electrically connecting the connection cable and the control unit in the 1 st mounting state.

5. Control panel of a passenger conveyor according to claim 4,

the 2 nd mounting portion also serves as a connection portion for electrically connecting the control unit and another connection target device different from the connection target device in the 1 st mounting state.

6. A method of maintenance servicing a control panel of a passenger conveyor, comprising:

a separation step of separating a cable body from a connection target device, the cable body having a connection cable for electrically connecting a control unit included in a control panel main body to the connection target device and being attached to the control panel main body; and

and a drawing step of drawing out at least a part of the control panel main body from a frame in which the control panel main body is housed, with the cable body serving as a grip portion after the separation step.

7. The maintenance and repair method of a control panel of a passenger conveyor according to claim 6,

in the separation step, the cable body is separated from each of the control panel main body and the connection target device,

after the separation step and before the drawing step, there is an attachment step of attaching the cable body to the control panel main body by changing the position of the cable body.

Technical Field

The present invention relates to a control panel of a passenger conveyor and a maintenance and inspection method of the control panel of the passenger conveyor.

Background

A control panel and a motor are provided in a machine room of a passenger conveyor. When the maintenance worker performs maintenance work on the control panel, the control panel needs to be taken out from the machine room. A grip is fixed to an upper portion of a control panel of the conventional passenger conveyor described in patent document 1. The control panel can be taken out from the machine room by the operator lifting up the grip portion.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2001-335269

Disclosure of Invention

Problems to be solved by the invention

However, a connection cable for electrically connecting to a motor is attached to a control panel of the conventional passenger conveyor described in patent document 1. Therefore, when the control panel is taken out from the machine room and maintenance and inspection work is performed, it is necessary to collect the connection cables connected to the control panel at a place where the work is not obstructed. Therefore, in the conventional passenger conveyor, the maintenance and inspection work of the control panel takes a lot of time.

The present invention has been made to solve the above-described problems, and an object thereof is to provide a control panel for a passenger conveyor and a maintenance and inspection method for a control panel for a passenger conveyor, which can reduce the burden of maintenance and inspection work on the control panel.

Means for solving the problems

In order to solve the above problem, a control panel for a passenger conveyor according to the present invention includes: a frame; a control panel main body having a control unit which is housed in the frame in a drawable manner; and a cable body attached to the control unit, the cable body having a connection cable for electrically connecting the control unit to the device to be connected, wherein an attachment state of the cable body to the control unit is selectable between a 1 st attachment state in which the control unit is electrically connected to the device to be connected via the connection cable and a 2 nd attachment state in which the cable body is separated from the device to be connected, positions of the cable body to the control unit are different between the 1 st attachment state and the 2 nd attachment state, and the cable body in the 2 nd attachment state serves as a grip portion for pulling out the control unit from the frame.

Effects of the invention

According to the control panel of the passenger conveyor and the maintenance and inspection method of the control panel of the passenger conveyor, the burden of maintenance and inspection operation of the control panel can be reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of a passenger conveyor provided with a control panel according to embodiment 1 of the present invention.

Fig. 2 is a plan view of a machine room provided with a control panel of the passenger conveyor shown in fig. 1.

Fig. 3 is a front view of the control panel provided inside the machine room shown in fig. 2, as viewed from the landing side.

Fig. 4 is a left side view of the control panel shown in fig. 3.

Fig. 5 is a left side view of the frame of the control panel shown in fig. 3.

Fig. 6 is a front view of a frame of the control panel shown in fig. 3.

Fig. 7 is a left side view of a control unit of the control panel shown in fig. 3.

Fig. 8 is a front view of a control unit of the control panel shown in fig. 3.

Fig. 9 is a front view of the control panel grip shown in fig. 3.

Fig. 10 is a right side view of the grip portion of the control panel shown in fig. 3.

Fig. 11 is a diagram showing a state in which the control unit is detached from the control panel shown in fig. 3.

Detailed Description

Embodiment 1.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 1 is a schematic view of the overall structure of a passenger conveyor provided with a control panel according to embodiment 1 of the present invention. Fig. 2 is a plan view of a machine room provided with a control panel of the passenger conveyor shown in fig. 1. As shown in fig. 1, the passenger conveyor 1 includes a truss 1a and a plurality of steps 1b supported by the truss 1 a. The longitudinal ends of the truss 1a are supported by the upper-layer structure. The lower end in the longitudinal direction of the truss 1a is supported by the structure on the lower layer. An upper-layer entrance of the passenger conveyor 1 is provided above the longitudinal upper end of the truss 1 a. A lower landing entrance of the passenger conveyor 1 is provided above the lower end in the longitudinal direction of the truss 1 a.

The plurality of steps 1b are connected in a ring shape. The plurality of steps 1b can be cyclically moved between the upper landing entrance and the lower landing entrance.

A machine room 2 is provided at the longitudinal end of the truss 1 a. As shown in fig. 2, a drive motor 3 and a control panel 4 for controlling the drive motor 3 are provided inside the machine room 2. In the following description, the side on which the steps 1B are provided is referred to as a step side S and the side on which the upper-layer structure is provided is referred to as a landing side B, as viewed from the machine room 2. In this example, the drive motor 3 is provided on the step side S of the control panel 4.

The drive motor 3 is a drive device that generates a drive force for circulating the plurality of steps 1 b. The control panel 4 controls the driving motor 3 to control the moving speed and moving direction of the plurality of steps 1 b.

Fig. 3 is a front view of the control panel 4 provided inside the machine room 2 shown in fig. 2, as viewed from the landing side B. Fig. 4 is a left side view of the control panel 4 shown in fig. 3. Fig. 5 is a left side view of the frame of the control panel shown in fig. 3. Fig. 6 is a front view of the frame of the control panel 4 shown in fig. 3. Fig. 7 is a left side view of the control unit of the control panel 4 shown in fig. 3. Fig. 8 is a front view of the control unit 9a of the control panel 4 shown in fig. 3. The control panel 4 includes a frame 8 and a control panel main body 9 provided on the frame 8. The control panel main body 9 has three control units 9a, 9b, and 9c which are housed in the frame 8 so as to be able to be pulled out.

As shown in fig. 5, the frame 8 is formed with three recesses 8a, 8b, and 8c corresponding to the three control units 9a, 9b, and 9c, respectively. The control unit 9a is housed in the recess 8 a. The control unit 9b is housed in the recess 8 b. The control unit 9c is housed in the recess 8 c. The control units 9a, 9b, and 9c are each rectangular parallelepiped in shape.

As shown in fig. 4, an upper side connector 12a as a 1 st mounting portion is provided on an upper side of a side surface of the control unit 9 a. A lower side connector 13a as a 2 nd mounting portion is provided on a lower side of a side surface of the control unit 9 a. Further, the control units 9b and 9c are also the same shape as the control unit 9 a. That is, an upper side connector 12b as a 1 st mounting portion is provided on an upper side of a side surface of the control unit 9 b. A lower side connector 13b as a 2 nd mounting portion is provided on a lower side of a side surface of the control unit 9 b. An upper side connector 12c as a 1 st mounting portion is provided on an upper side of a side surface of the control unit 9 c. A lower side connector 13c as a 2 nd mounting portion is provided on a lower side of a side surface of the control unit 9 c. Different components are stored in the control units 9a, 9b and 9c, respectively.

As shown in fig. 3, an existing power supply cable 6 is attached to the upper end of the frame 8. Further, a motor cable 7 electrically connected to the drive motor 3 is attached to a lower end of the frame 8. The frame 8 is provided with an upper frame connector 16 connected to an end of the existing cable 6 and a lower frame connector 17 connected to an end of the motor cable 7.

The upper frame connector 16, the upper connector 12a, the lower connector 13a, the upper connector 12b, the lower connector 13b, the upper connector 12c, the lower connector 13c, and the lower frame connector 17 are arranged at equal intervals in this order from above. The upper frame connector 16, the lower frame connector 17, the upper side connectors 12a, 12b, and 12c, and the lower side connectors 13a, 13b, and 13c are push-pull connectors.

The control panel 4 further includes cable bodies 5a to 5 d. The cable body 5a is disposed between the upper portion of the frame 8 and the uppermost control unit 9 a. Further, the cable body 5a has a 1 st end 51a and a 2 nd end 52 a. The 1 st end 51a is attached to the upper frame connector 16 of the frame 8. The 2 nd end 52a is attached to the upper side connector 12a of the control unit 9 a.

A cable body 5b is provided between two control units 9a, 9b adjacent to each other. The cable body 5b has a 1 st end 51b and a 2 nd end 52 b. The 1 st end 51b is attached to the lower side connector 13a of the control unit 9 a. The 2 nd end portion 52b is attached to the upper side connector 12b of the control unit 9 b.

A cable body 5c is provided between two control units 9b, 9c adjacent to each other. The cable body 5c has a 1 st end 51c and a 2 nd end 52 c. The 1 st end 51c is attached to the lower side connector 13b of the control unit 9 b. The 2 nd end portion 52c is attached to the upper side connector 12c of the control unit 9 c.

A cable body 5d is provided between the lowermost control unit 9c and the lower portion of the frame 8. The cable body 5d has a 1 st end 51d and a 2 nd end 52 d. The 1 st end 51d is attached to the lower side connector 13c of the control unit 9 c. The 2 nd end 52d is attached to the lower frame connector 17 of the frame 8.

The cable bodies 5a, 5b, 5c, and 5d all have the same shape. As will be described later, the cable bodies 5a, 5b, 5c, and 5d function as gripping portions when the control units 9a, 9b, and 9c are detached.

Fig. 9 is a front view of the cable body 5a of the control panel 4 shown in fig. 3. Fig. 10 is a right side view of the cable body 5a of the control panel 4 shown in fig. 3. The cable body 5a includes a metal pipe 10 as a cover member bent in a U shape and a connection cable 11 housed inside the metal pipe 10.

Cable connectors 14 connected to the connection cable 11 are provided at the 1 st end 51a and the 2 nd end 52a of the cable body 5a, respectively. The cable bodies 5b, 5c, and 5d have the same structure as the cable body 5 a. That is, the 1 st end 51b and the 2 nd end 52b of the cable body 5b are provided with the cable connectors 14 connected to the connection cables 11 of the cable body 5b, respectively. Cable connectors 14 connected to the connection cables 11 of the cable body 5c are provided at the 1 st end 51c and the 2 nd end 52c of the cable body 5c, respectively. Cable connectors 14 connected to the connection cables 11 of the cable body 5d are provided at the 1 st end 51d and the 2 nd end 52d of the cable body 5d, respectively.

Each cable connector 14 is configured to be attachable to and detachable from the upper frame connector 16, the lower frame connector 17, the three upper side connectors 12a, 12b, and 12c, and the three lower side connectors 13a, 13b, and 13c of the frame 8 by one operation.

Thus, the upper frame connector 16 serves as both an attachment portion for mechanically attaching the respective cable bodies 5a, 5b, 5c, and 5d to the frame 8 and a connection portion for electrically connecting the connection cable 11 to the existing cable 6. The lower frame connector 17 serves as a mounting portion for mechanically mounting the cable bodies 5a, 5b, 5c, and 5d to the frame 8 and a connecting portion for electrically connecting the connection cable 11 to the motor cable 7. Further, the upper-side connectors 12a, 12b, and 12c and the lower-side connectors 13a, 13b, and 13c serve as attachment portions for mechanically attaching the cable bodies 5a, 5b, 5c, and 5d to the control units 9a, 9b, and 9c and connection portions for electrically connecting the connection cables 11 to the control units 9a, 9b, and 9 c.

Next, a maintenance and inspection method of the control panel 4 will be described with reference to fig. 3 and 11. When performing maintenance work on the control panel 4, a control unit requiring maintenance among the control units 9a, 9b, and 9c is detached from the frame 8.

Fig. 11 is a diagram showing a state where the control units 9a, 9b, and 9c are detached from the control panel 4 shown in fig. 3. In the following description, the mounting state of each of the cable bodies 5a, 5b, 5c, and 5d shown in fig. 3 is referred to as the 1 st mounting state. The respective mounting states of the cable bodies 5a, 5b, and 5c shown in fig. 11 are set as the 2 nd mounting state. That is, the mounting state of the cable bodies 5a, 5b, and 5c with respect to the control units 9a, 9b, and 9c can be selected between the 1 st mounting state shown in fig. 3 and the 2 nd mounting state shown in fig. 11.

First, a state before the control units 9a, 9b, and 9c are detached from the control panel 4 will be described with reference to fig. 3.

In the 1 st mounted state shown in fig. 3, the control units 9a, 9b, and 9c are electrically connected to the connection target devices via the connection cables 11 of the cable bodies 5a, 5b, 5c, and 5d, respectively. The connection target devices corresponding to the control units 9a, 9b, and 9c are the existing cables 6, the motor cables 7, or other adjacent control units. That is, the connection target devices corresponding to the control unit 9a are the existing cable 6 and the adjacent other control unit 9 b. The connection target device corresponding to the control unit 9b is the other two adjacent control units 9a and 9 c. Further, the connection target devices corresponding to the control unit 9c are the other control unit 9b and the motor cable 7 adjacent thereto.

Next, in the separation step, the cable bodies 5a, 5b, 5c, and 5d are separated from the existing cable 6, the motor cable 7, and the three control units 9a, 9b, and 9 c. That is, the 1 st end 51a and the 2 nd end 52a of the cable body 5a are separated from the upper frame connector 16 of the frame 8 and the upper side connector 12a of the control unit 9 a. Further, the 1 st end 51b and the 2 nd end 52b of the cable body 5b are separated from the lower side connector 13a of the control unit 9a and the upper side connector 12b of the control unit 9 b. Further, the 1 st end 51c and the 2 nd end 52c of the cable body 5c are separated from the lower side connector 13b of the control unit 9b and the upper side connector 12c of the control unit 9 c. Further, the 1 st end 51d and the 2 nd end 52d of the cable body 5d are separated from the lower side connector 13c of the control unit 9c and the lower side frame connector 17 of the frame 8.

Next, in the mounting step, as shown in the 2 nd mounting state of fig. 11, the respective cable bodies 5a, 5b, and 5c are mounted on the control units 9a, 9b, and 9c while being shifted in position from the 1 st mounting state. That is, the 1 st end 51a of the cable body 5a is attached to the upper side connector 12a of the control unit 9a, and the 2 nd end 52a is attached to the lower side connector 13 a. The 1 st end 51b of the cable body 5b is attached to the upper connector 12b of the control unit 9b, and the 2 nd end 52b is attached to the lower connector 13 b. The 1 st end 51c of the cable body 5c is attached to the upper side connector 12c of the control unit 9c, and the 2 nd end 52c is attached to the lower side connector 13 c. Thus, the cable bodies 5a, 5b, and 5c can be used as gripping portions for individually pulling out the control units 9a, 9b, and 9c from the frame 8. At this time, the respective cable bodies 5a, 5b, and 5c are separated from the connection target devices.

In addition, during the maintenance and inspection work of the control units 9a, 9b, and 9c, the cable body 5d is temporarily placed in an appropriate storage place in a state of being separated from the control panel main body 9 and the frame 8.

As shown in fig. 11, in the drawing step of the control units 9a, 9b, and 9c, the cable bodies 5a, 5b, and 5c attached to the control units 9a, 9b, and 9c, respectively, function as gripping portions. The operator pulls out the control units 9a, 9b, and 9c, which are part of the control panel main body 9, from the recesses 8a, 8b, and 8c of the frame 8 in which the control panel main body 9 is housed, by using the respective cable bodies 5a, 5b, and 5c, which are the gripping portions. After that, maintenance work is performed on the pulled out control units 9a, 9b, and 9 c. All of the control units 9a, 9b, and 9c may be pulled out from the frame 8, or one or both of the control units may be pulled out from the frame 8. In addition, in the 2 nd mounting state shown in fig. 11, the cable bodies 5a, 5b, 5c, and 5d that are temporarily separated from the frame 8 and the control units 9a, 9b, and 9c can be mounted to any of the control units 9a, 9b, and 9 c.

After that, when the maintenance work for the control unit requiring maintenance is completed, the control units 9a, 9b, and 9c are stored in the frame 8 in the reverse order to the above. Thereafter, the installation state of each of the cable bodies 5a, 5b, 5c, and 5d to the control panel main body 9 is set to the 1 st installation state, and the maintenance work of the control panel 4 is completed.

As described above, each of the cable bodies 5a, 5b, 5c, and 5d as the gripping portion provided in the control panel 4 of the present embodiment includes the connection cable 11 for electrically connecting the control units 9a, 9b, and 9c to the devices to be connected, respectively. In addition, the mounting state of the cable bodies 5a, 5b, and 5c to the control units 9a, 9b, and 9c can be selected between a 1 st mounting state in which the control units 9a, 9b, and 9c are electrically connected to the connection target device via the connection cable 11 and a 2 nd mounting state in which the cable bodies 5a, 5b, and 5c are separated from the connection target device. Therefore, the cable bodies 5a, 5b, and 5c integrated with the connection cable 11 can be used as the gripping portions simply by changing the positions of the cable bodies 5a, 5b, and 5c with respect to the control units 9a, 9b, and 9 c. As a result, the control units 9a, 9b, and 9c can be detached from the frame 8 during maintenance work by grasping the respective cable bodies 5a, 5b, and 5 c. That is, when the control units 9a, 9b, and 9c are detached from the control panel 4, the connection cable provided separately from the grip portion does not become an obstacle. Further, the operator does not have to pull around the connection cable and concentrate the connection cable to a place where the operator does not interfere with the work. Therefore, the burden of maintenance work on the control panel 4 can be reduced.

Further, in the case where the control units 9a, 9b, and 9c pulled out from the frame 8 are connected to the connection cables provided separately from the grip portions, the moving range is limited by the length of the connection cables. Therefore, places where the control units 9a, 9b, and 9c can be placed are limited. In contrast, in the control panel 4 and the maintenance and inspection method for the control panel 4 according to the present embodiment, since the cable bodies 5a, 5b, and 5c having the connection cable 11 can be used as the gripping portions, the maintenance and inspection work can be performed on the control units 9a, 9b, and 9c at any place.

The control panel main body 9 has a plurality of control units 9a, 9b, and 9 c. That is, another control unit different from the specific control unit is set as the connection target device, and the specific control unit is electrically connected to the other control unit via the connection cable 11 in the 1 st mounting state. Therefore, only the control units that require maintenance work can be taken out of the control units 9a, 9b, and 9c that are part of the control panel main body 9. Further, since each control unit 9a, 9b, or 9c can be detached from the control panel 4, the burden on the operator is reduced as compared with a case where the control panel main body 9 as a single component is taken out.

Each of the cable bodies 5a, 5b, 5c, and 5d has a metal pipe 10 as a cover member for housing a connection cable 11. Thus, when the cable bodies 5a, 5b, 5c, and 5d are used as the holding portions, the connection cable 11 is protected by the metal pipe 10, and disconnection is prevented. Further, the operator can grip the cable bodies 5a, 5b, 5c, and 5d more easily, and the workability is further improved.

In the 2 nd mounting state shown in fig. 11, the 1 st end portions 51a, 51b, and 51c of the cable bodies 5a, 5b, and 5c are mounted on the 1 st mounting portions of the control units 9a, 9b, and 9c, i.e., the upper side connectors 12a, 12b, and 12 c. In the 1 st mounted state shown in fig. 3, the upper connectors 12a, 12b, and 12c also serve as connection portions for electrically connecting the connection cables 11 of the cable bodies 5a, 5b, and 5c to the control units 9a, 9b, and 9 c. This enables the upper connectors 12a, 12b, and 12c to be used as attachment portions for the grip portions and connection portions for connecting the cables 11, and the structures of the control units 9a, 9b, and 9c to be simplified.

Further, in the 2 nd mounting state shown in fig. 11, the 2 nd end portions 52a, 52b, and 52c of the cable bodies 5a, 5b, and 5c are mounted on the 2 nd mounting portions of the control units 9a, 9b, and 9c, i.e., the lower-side connectors 13a, 13b, and 13 c. In the 1 st mounted state shown in fig. 3, the lower connectors 13a, 13b, and 13c also serve as connection portions for electrically connecting the control units 9a, 9b, and 9c to the devices to be connected, respectively. Accordingly, the lower connectors 13a, 13b, and 13c can be used as the mounting portions and the connecting portions, as in the upper connectors 12a, 12b, and 12c, and the configurations of the control units 9a, 9b, and 9c can be simplified.

In the maintenance and inspection method of the control panel 4 according to the present embodiment, the cable bodies 5a, 5b, 5c, and 5d are separated from the control units 9a, 9b, and 9c of the control panel main body 9 and the connection target devices in the separation step, respectively, but the method is not limited thereto. For example, after the 1 st end 51a of the cable body 5a is separated from the connection target device, the cable body 5a may be rotated around the 2 nd end 52a attached to the upper connector 12 a. Thus, the 1 st end 51a of the cable body 5a is attached to the lower side connector 13a of the control unit 9a, and the cable body 5a can be used as a grip. The cable bodies 5b and 5c can be used as the gripping portions by rotating and moving in the same manner. At this time, the 1 st end 51d of the cable body 5d not used as the grip is also separated from the lower side connector 13c of the control unit 9 c.

In the present embodiment, the number of control units constituting the control panel main body 9 is not limited to three.

The cover member is not limited to a metal pipe, and may be a plastic pipe.

Further, not limited to this embodiment, the 1 st mounting portions of the control units 9a, 9b, and 9c may be the lower side connectors 13a, 13b, and 13c, and the 2 nd mounting portions may be the upper side connectors 12a, 12b, and 12 c.

Description of the reference symbols

1: a passenger conveyor; 4: a control panel; 5: a cable body (grip portion); 8: a frame; 9: a control panel main body; 9a, 9b, 9 c: a control unit; 10: a metal tube (cover member); 11: connecting a cable; 12a, 12b, 12 c: an upper connector (1 st mounting part); 13a, 13b, 13 c: a lower side connector (No. 2 mounting part); 51a, 51b, 51 c: 1 st end part; 52a, 52b, 52 c: 2 nd end portion.