JP3394381B2 - Service cart power connection structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a service cart.
Related to power supply connection structure. That is, for example, in aircraft
Power connection structure of service cart with used electrical components
It is about. [0002] 2. Description of the Related Art For example, an in-flight service provided on an aircraft
Service carts with electrical components such as heaters,
When stored in the galley onboard the galley compartment
The service cart is connected to the power supply side connector attached to the
Is connected to the cart side connector attached to the
Electrical components such as motors are energized. FIG.
The schematic of the power connection structure of such a service cart
It is. [0003] As shown in FIG.
In the compartment, the front power side connector P or
One of the rear power side connector Q is attached,
The front connector P on the front side is
Connector on the rear power supply side
Are attached to the rear, back and rear of the compartment.
ing. In this way, in the galley compartment
Is equipped with one of two types of power supply side connectors
In other words, the front power supply side connector P or
A) If any of the power supply side connectors Q
As a matter of fact, recent service carts can handle any of them
The front cart connector R and rear cart
Two-connector type with both side connectors S attached
Many. That is, the power supply side connector is
In consideration of the two types of
As a service provider, the front and front sides of the service cart
Front cart connector R and rear / rear rear car
In many cases, both connectors are attached to the
No. The front power supply side connector P and the flow
The manual connection between connectors R
It consists of a new connection method. In contrast, the rear power supply side
Service car between connector Q and rear cart side connector S
Is stored in the galley compartment
Automatic connection method, where contact and mating connections are made at corresponding positions.
It becomes. 1, 2 and 3 are connectors on the front cart side.
Connector R for the three-layer AC power supply of the
Connector terminal for neutral, 5 is the connector end for ground
Connectors 6 and 7 are DC connector ends used for related control
I am a child. 8, 9, 10 are the rear cart side connector S
11 is a connector terminal for a three-layer AC power supply.
12 and 13 are ground connectors.
Terminals 14 and 15 are DC connectors used for related control.
Terminal. 16 is a noise filter, U1, V
1, W1, N1 are input terminals thereof, U2, V2, W2, N
2 is a corresponding output terminal, and 17 is an electric device such as a heater.
The product side is shown, and 18 is a door switch. [0005] By the way, such a problem is solved.
The following problems have been pointed out in the conventional example. First
1. Connect the front power connector P and the front cart connector
If the connection between the connectors R is not
The connector S is also energized, and conversely,
When connector Q and rear cart side connector S are connected
If not used, turn on the unused front cart connector R
It was pointed out that it would be done. That is, the connector R of the front cart side
Connector terminals 1, 2, 3, 6, 7, etc.
Connector terminals 8, 9, 10, 14, 15, etc. of connector S
Are noises corresponding to the electrical components 17 in a corresponding relationship.
Indirectly via input terminals U1, V1, W1 of filter 16
, Or in a directly connected relationship.
Therefore, in particular, the rear cart side connector S is connected to the rear power supply side connector.
When power is input by being connected to the
The connector R on the cart side is also energized,
And the wrong connector R on the front cart side
Touching the hand may cause an electric shock accident.
Was a problem. Secondly, there is a need for measures against such electric shock accidents.
In the past, the connection to the power connector
Front cart side connector that is exposed when not in use
About the R, (For the rear cart side connector S,
Electric shock due to the rear, back and rear sides of the stored galley
There is little danger), and the cap T
I was However, using the cap T in this manner
Method, it is necessary to attach and remove the cap T one by one.
Management and handling are cumbersome and cumbersome,
Problem was pointed out. Remove the cap T
It is often seen that they forget to put on,
From this point of view, the risk of electric shock
It was pointed out. The present invention has been made in view of such circumstances, and
It was made to solve a conventional problem, and a cart
One of the power connectors and the corresponding power connector
If they are connected, the connection between one of them and the
Automatic disconnection between one or the electrical component side and the other
A first control means for switching is provided, and both cart side connectors are provided.
To the door switch between the DC connector terminals of the
And a corresponding connection through a diode as a second control means.
First, connect to the power supply side connector
Not the other cart side connector, especially the front cart
In addition to preventing electric shock accidents at the side connector,
And this is automatically and easily realized by the service
The purpose is to propose a power supply connection structure for a cart. [0009] [Means for Solving the Problems] To solve such problems.
The technical means of the present invention is as follows. This service
The power connection structure of Biskirt is the galley's compartment.
Of a service cart with electrical components that can be stored in
Related to the source connection structure. And the galley compartment
Connector on the front or rear power supply attached to the
At the same time, the corresponding front desk or
Can be connected alternatively with the rear cart side connector
And a first control means for automatic switching is provided.
I have. The first control means is connected to the front power supply side connector.
Is connected between the connector and the front cart side connector
Is connected between the front cart side connector and the electrical component side.
And the front cart side connector and the electrical component side
Between the rear cart side connector and the rear cart.
The power connector and the rear cart connector are connected
If this is the case, connect the connector between the rear cart and the electrical component.
With the rear cart side connector and the electrical component side
Control to disconnect between the front cart side connector
Is carried out. In addition, the front cart side connector and the rear
DC connector attached to each cart side connector
Between the service terminals and the service cart.
Connected to a door switch that is intermittent with the opening and closing of the door
ing. Then, the diode as the second control means is connected to the diode.
Connection circuit on connector terminal side of front cart connector
The connector terminal side is reversed and the connector terminal side is
It is interposed so as not to energize
And As described above, the power supply connection of the service cart is performed.
In the connection structure, the connector on the front or rear cart side
Either of the
When connected to the connector, first, the first control means automatically
Switching is performed. In other words, the files connected in this way
Between the front or rear cart connector and the electrical component
Connected, or the front or rear cart connected in this way
And one of the electrical components and the other unconnected
Between the front or rear cart connector.
You. As a result, the other
If the front or rear cart side connector is
Or, by inputting power to the rear cart connector,
It will not be lost. At the same time, a diode as the second control means
Is also performed. Therefore, the rear cart side connector
If the power is connected to the rear power connector,
DC connector terminal for related control of the port side connector
However, there is no energization. In addition, front car
If the power connector is connected to the front power connector,
The DC connector for the related control of the rear cart side connector.
The terminal is energized, but the rear side of the stored galley
・ Because it is located on the back side and the back side,
Absent. [0013] BRIEF DESCRIPTION OF THE DRAWINGS FIG.
This will be described in detail based on an embodiment. Fig. 1
FIG. 3 is a circuit diagram for explaining the embodiment of FIG.
It is a perspective view of a service cart. Referring first to FIG. 3, this type of service
The cart 19 will be generally described. Service cart
19 comprises a box-shaped door 20 and casters 21,
For example, while storing food inside to keep warm,
Service. That is, the service cart 19 is an example
For example, in the cabin of an aircraft or in the cabin of a vehicle such as a bullet train
The occupants provide services such as meals and drinks to the passengers in the seats.
It is used when implementing. And a rectangular top plate 2
2, floor plate 23, left and right side plates 24, etc.
It has a box shape with a door 20
A caster 21 is attached and moved by pushing. Top plate 2
2, the floor panel 23, the left and right side panels 24, the door 20 and the like are insulated.
Panels made of wood are used.
Aluminum and other light metal cores
It is assembled to the knuckle member. The left and right inside of such a service cart 19
(That is, the inner surfaces of the left and right side plates 24)
A guide rail 25 is provided between the guide rails 25.
Rays (not shown) are placed freely in and out and placed on a tray
Food and drinks are placed on the tray.
Electric equipment 17 for cooking (see Fig. 1)
Has been established. This heater has its terminals and corresponding
A pantgra provided opposite the upper part of the guide rail 25
Through the terminals of the cable structure and the wiring, etc.
From the connector to the power connector.
ing. The service cart 19 is, for example, an aircraft
Of the galley 26 at the corner inside
Compartment 27 and can be stored in compartment 2
7 is an entrance for storing the service cart 19 at the front.
It has a box shape that is open to the outside, and multiple partitions are formed by a partition plate
Have been. Service carts 19 are generally
Swelling. Now, as shown in FIG. 3 and FIG.
In the power connection structure of the service cart 19, first, the galleries
-26 front compartment attached to compartment 27
Is the service cart for the rear power side connector P or Q.
Corresponding front and rear cart connectors attached to 19
R and S can be connected alternatively.
You. These are described in detail below.
The compartment 27 has the front side, entrance side, and front side
A power supply side connector P is attached to the
Rear power connector Q is attached to the rear, rear, and rear sides.
Have been. So this service cart 19
It is a two-connector type that can handle
The front power supply side connector P is attached to the
The power supply side connector P manually.
Front cart side connector R that can be connected
The rear power supply is attached to the galley 26
When the side connector Q is attached, this rear power supply side
A contact and mating connection that can be
Akat side connector S is attached to the rear side and the rear side.
You. In FIG. 1, 1, 2, 3, 4, 5, 6, 7 are:
This is a connector terminal of the front cart side connector R. So
The connector terminals 1, 2, and 3 are 115V and 400H_Two
Connector terminal 4 for the three-layer AC power supply
For lance holding neutral, connector terminal
5 is for grounding, connector terminals 6 and 7 are for related control
It is for 28 V DC used. And this
Each connector terminal of the front cart side connector R like
1, 2, 3, 4, 5, 6, and 7 correspond to the corresponding files, respectively.
Connected to each connector terminal of front power supply side connector P
It has become. Similarly, 8, 9, 10, 11, 1
2, 13, 14, and 15 are connectors of the rear cart side connector S.
Nectar terminal. And connector terminals 8, 9, 10
Is 400V at 115V_TwoFor three-layer AC power supply, connector
Terminal 11 is a neutral
And connector terminals 12 and 13
Connector terminals 14 and 15 are used for related control.
It is for 8V DC. And such a rearka
Connector terminals 8, 9, 10, 1 of the port side connector S
1, 12, 13, 14, and 15 correspond to the corresponding resources, respectively.
A Connect to each connector terminal of the power supply side connector Q
It has become. Next, the noise filter 16 is connected to the input terminal U
1, V1, W1, N1 and corresponding output terminals U
2, V2, W2, and N2. And input terminal
U1, V1, and W1 are connected to the front cart side respectively.
Connector terminals 1, 2 and 3 of the
Connector terminals 8, 9, and 10 of the
As described above, switching connection is possible by each relay contact.
The input terminal N1 is connected to the front cart side connector R
Toral connector terminal 4 and rear cart side connector S
Is connected to the neutral connector terminal 11
You. The output terminal of such a noise filter 16
U2, V2, W2, and N2 are the electrical components 17 such as those described above.
Connected to the tray heater. The door switch 18 is a front cart.
DC circuit between the connector terminals 6 and 7 of the
Direct connection between connector terminals 14 and 15 of connector S
It is connected to the flow circuit as described below. And this
The door switch 18 of the service cart 19
(See FIG. 3) is closed (closed) when closed.
If the door 20 is opened,
(Open). Now, the power supply connection of this service cart 19
In the structure, the first control means 28 for automatic switching is further provided.
Is provided. First, the first control means 28
Front power connector P and front cart connector R
Is connected to the front cart,
And the electrical component 17 side.
To cart side connector R and electrical component 17 side and rear cart side connector
Control is performed to disconnect from the connector S. The opposite
Between the rear power side connector Q and the rear cart side connector S
Is connected to the rear cart side connector S.
The connector between the equipment 17 side and the rear cart side connector
S or between the electrical component 17 side and the front cart side connector R
Is controlled so as to cut off. As such a first control means 28,
In the example, a method using a relay is adopted. Sand
For example, the connector terminal 10 of the rear cart side connector S
Between the relay contact C1 and the connector terminals 4 and 11 and the input terminal.
Position X in a circuit provided to connect the
A relay coil 29 is interposed between 1 and X2.
The relay contact A1 is connected to the rear cart side connector.
At the end of the circuit from the connector terminal 8 of S, a relay contact A2
Is the end of the circuit from the input terminal U1 of the noise filter 16.
And the relay contact A3 is connected to the front cart side connector R.
At the end of the circuit from connector terminal 1
You. Similarly, when the relay contact B1 is
At the end of the road, the relay contact B2 is connected to the circuit from the input terminal V1.
At the end, the relay contact B3 is the end of the circuit from the connector terminal 2.
In each, it is arranged. Further, the relay contact C1 is
The relay contact C2 is inserted into the end of the circuit from the connector terminal 10.
A relay contact C3 is connected to the end of the circuit from the force terminal W1.
Are provided at the ends of the circuit from the data terminal 3 respectively. The relay coil 29 is energized.
While the rear cart side connector S is
Power from the connector S on the rear cart side
Is input) as follows. That is, the figure
Irrespective of the state shown, between the relay contacts A1, A2, B
Switch between 1 and B2, and between C1 and C2 respectively (closed)
The relay contacts A2 and A3, B2 and B3, C2
C3 is set so that it switches to disconnection (closed).
ing. In other words, in this case,
The continued connection between the rear cart connector S and the electrical component 17 side
Continue (close) through the noise filter 16 and
Una rear cart side connector S and electrical component 17 side,
The gap between the cart side connector R is disconnected (closed). On the other hand, the relay coil 29 is energized.
If not (that is, if the front cart side connector R
Connected to the power supply connector P on the front
When power is input from the connector R,
), The state shown in FIG. That is, the relay contact A
2, A3, B2, B3, C2, C3
(Closed), between relay contacts A1 and A2, B1 and B2
And between C1 and C2 are switched to open (open) respectively.
Is set. In other words, in this case,
Connector R connected to the front cart side
The equipment 17 side is connected via the noise filter 16.
(Closed) And such front cart side connector
R or between the electrical component 17 side and the rear cart side connector S
However, it is disconnected (opened). First control means 2 using a relay
The control by 8 is implemented in this way. Next, the second control means 30 and the like will be described.
You. First, the front cart side connector R and the rear cart side
DC connector ends attached to connector S
Between the children 6 and 14 and between 7 and 15 are correspondingly connected,
For opening and closing the door 20 (see FIG. 3) of the service cart 19
Accordingly, it is connected to a door switch 18 which is intermittent. So
And the diode 31 as the second control means 30 is
In the connection circuit on the connector terminal 6 side of the cart side connector R,
Make the connector terminal 6 side the opposite direction, and
It is interposed so as not to energize. With respect to the second control means 30 and the like,
Further details will be described. First, the diode 3 as the second control means 30
1 is for DC related control of the front cart side connector R
The connection circuit near the connector terminal 6 for the
The opposite side is the direction that is not energized, and the opposite
Side is interposed as the forward direction
You. Therefore, the front cart connector R is
When connected to the source side connector P, the connector
DC for related control from terminal 6 to connector terminal 7
Is supplied to the diode 31 as the second control means 30 and the like.
Is possible via the rear cart
When S is connected to the rear power connector Q
Is related from connector terminal 14 to connector terminal 15.
Even if the control DC can be supplied,
The diodes 6 serving as the second control means 30
The current is cut off. And to these
In addition, when the door switch 18 is closed,
By switching from the state to continuous (closed), the rear cart side
Connector terminals 14, 15 of connector S and rear power supply side
Via the connector Q, etc. or the connector on the front cart side
R connector terminals 6, 7 and front power supply side connector
The corresponding association on the galley 26 side described above via
A control device (not shown) is energized and driven.
ing. The present invention is configured as described above.
I have. Then, it becomes as follows. Provided for in-flight services, etc.
Service cart 19 with electrical components 17
-When stored in the 26, the galley 26 compartment
To the power supply side connector attached to
The cart side connector attached to 19 is connected,
The electrical component 17 is energized. And gi
The compartment 27 of the tray 26
Side connector P or rear power supply side connector Q
Is installed in the service cart 19,
Front cart side connector
The connector R and the rear cart side connector S are both attached.
ing. Then, the power supply connection of the service cart 19 is performed.
In the connection structure, the front and rear cart side connectors
Either R or S is the corresponding front or rear power supply
When connected to either of the side connectors P and Q,
1 The following automatic switching is performed by the control means 28.
You. That is, the connected front and rear cart side connectors
If one of the electrical components 17 is connected to one of the
One of the front and rear cart side connectors R and S
And rear components that were not connected to the
The connection between the other port-side connectors R and S is disconnected. This
And the front and rear power supply side connectors P and Q
Is not connected and no power is input.
The other of the front and rear cart side connectors R and S is CFC
And power input to one of the rear cart side connectors R and S
As a result, there is no possibility that power is supplied.
Moreover, this is the first control for switching using, for example, a relay.
Just by providing the means 28, it is automatically and easily realized.
You. At the same time, the control by the second control means 30
Are also implemented at the same time. First, the rear cart side connector S
Is connected to the rear power connector Q and the door switch
Switch 18 is connected (closed) and the DC connector terminal 1
4 and 15 are energized, and the related control is performed by the galley 26.
If implemented on the side, then: this
In the case, DC connector of front cart side connector R
Between the terminals 6 and 7, the diode 31 of the second control means 30
Since the connector terminal 6 is interposed in the opposite direction,
It is not energized and does not cause any problems when touched. Next, the front cart side connector R is
Connected to the connector power supply side connector P, and the door switch
Switch 18 is connected (closed), and the DC connector terminals 6, 7 are connected.
During the period, current is supplied to the diode 31 of the second control means 30 in the forward direction.
When the related control is performed on the galley 26 side,
In that case, it is as follows. In this case, the rear cart
Between the DC connector terminals 14 and 15 of the side connector S.
The rear cart side connector S and the connector
Terminals 14 and 15 are connected to the rear of the galley 26 housed therein.
Touching the hand because it is located on the side, the back side and the back side
Is usually impossible and does not cause a problem. [0030] The power connection of the service cart according to the present invention
As described above, the structure of the cart connector
If one of them is connected to the corresponding power connector,
One of them is connected to the electrical component side,
First control for automatic switching to disconnect between the equipment side and the other
In addition to providing means for
Connect between the connector terminals while connecting to the door switch.
And a second control means, a diode,
The following effects are exhibited. First, there is no connection with the power supply side connector.
Cart side connector, especially front cart side connector
Electric shock accident is prevented. In other words, this service
For the power connection structure of the
If either of them is connected to the corresponding power connector,
In this case, the first control means controls one of the cart side connectors.
And the electrical components side, and the cart side
Between the connector and electrical components and the other cart side connector.
Becomes In this way, the power connector is connected.
The other cart that is not in use and has no power
Side connector is energized with power input to one side.
Nothing goes wrong. In particular, the rear cart side connector
When the power is connected to the rear power connector,
The front cart side connectors located on the side and front
Power is supplied when power is input to the power connector
This is no longer the case, as in the previous
May touch your hand,
There is no steep. Further, the rear cart side connector is connected to the rear power supply side.
When connected to the connector, it is located on the front / front side
Front cart side connector for related control
That the DC connector terminal is energized
Is also avoided by the second control means, and from this aspect
There is no danger of occurrence. The front cart side connector
If the power connector is connected to the front power connector,
For DC side connector used for related control
The connector terminals of the rear cart
The side connectors are the rear side, back side, and back of the stored galley.
Because it is located on the side, there is no touch
There is no danger of an accident. Second, and it is automatically simple and easy
Is realized. That is, the power connection of this service cart
In the connection structure, the first point described above is, for example, a relay
The first control means for switching using a
Just by providing the second control means, a manual switch etc.
Automatically and easily realized without using. You
That is, as in the above-described conventional example in which the cap is covered,
Easy to use without troublesome and troublesome handling
Electric shock due to good hands and forgetting to attach the cap
There is no danger of accidents. Thus, this type of conventional
Effects of the present invention, such as solving all the problems
Is remarkably large.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram for explaining an embodiment of a power supply connection structure of a service cart according to the present invention. FIG. 2 is a circuit diagram of a power supply connection structure of a service cart according to a conventional example of this kind. FIG. 3 is a perspective view of a service cart. [Description of Signs] 17 Electrical equipment 19 Service cart 26 Galley 27 Compartment 28 First control means 30 Second control means 31 Diode P Front power supply side connector Q Rear power supply side connector R Front cart side connector S Rear cart side connector

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) A47B 31/00 A47B 31/02

Claims (1)

(57) [Claim 1] A power supply connection structure of a service cart provided with an electric component, which can be stored in a galley compartment, and a front or rear power supply side attached to the galley compartment. The connector can be connected to a corresponding front or rear cart-side connector attached to the service cart, and a first control means for automatic switching is provided, and the first control means is provided. When the front power supply side connector and the front cart side connector are connected, while the front cart side connector and the electrical component side are connected,
The front cart side connector or the electrical component side and the rear cart side connector are disconnected, and when the rear power side connector and the rear cart side connector are connected, the rear cart side connector is disconnected. Control is performed so as to continue the connection between the electrical components and disconnect the rear cart connector and the electrical components from the front cart connector. Between the DC connector terminals attached to the rear cart side connector,
Connected to the door switch that is intermittently opened and closed when the door of the service cart is opened and closed.
A diode serving as control means is interposed in the connection circuit on the connector terminal side of the front cart side connector so that the connector terminal side is turned in the opposite direction so as not to conduct electricity toward the connector terminal side. Service cart power connection structure.