WO2019220183A1 - A draw out mechanism for electrical panels - Google Patents

A draw out mechanism for electrical panels Download PDF

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Publication number
WO2019220183A1
WO2019220183A1 PCT/IB2018/053504 IB2018053504W WO2019220183A1 WO 2019220183 A1 WO2019220183 A1 WO 2019220183A1 IB 2018053504 W IB2018053504 W IB 2018053504W WO 2019220183 A1 WO2019220183 A1 WO 2019220183A1
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WO
WIPO (PCT)
Prior art keywords
movable unit
arm
wheel
unit
roller
Prior art date
Application number
PCT/IB2018/053504
Other languages
French (fr)
Inventor
Lalith KAHATAPITIYA
Nadie KAHATAPITIYA
Original Assignee
Kahatapitiya Lalith
Kahatapitiya Nadie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kahatapitiya Lalith, Kahatapitiya Nadie filed Critical Kahatapitiya Lalith
Priority to PCT/IB2018/053504 priority Critical patent/WO2019220183A1/en
Publication of WO2019220183A1 publication Critical patent/WO2019220183A1/en

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/14—Mounting supporting structure in casing or on frame or rack
    • H05K7/1401—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means
    • H05K7/1411—Mounting supporting structure in casing or on frame or rack comprising clamping or extracting means for securing or extracting box-type drawers
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0217—Mechanical details of casings
    • H05K5/0221—Locks; Latches

Definitions

  • This invention relates to Electro-Mechanical Engineering, more particularly draw out mechanisms for electrical panels.
  • Draw out mechanisms assist machine operators to immediately remove the defective device/s using the draw out mechanism and replace it with a new device/s.
  • the current invention is an operational system for draw out mechanisms for electrical panels (hereinafter referred to as‘movable unit’) into and from the fixed unit for the purposes of inserting or withdrawing the movable unit whilst facilitating the engagement and disengagement of electrical power and control circuits characterized by;
  • Electric switch gear or control gear assemblies consist of movable and fixed units [(a) and (b) of Figure 1].
  • Fixed unit is the unit that is fixed permanently to the panel structure of the electrical switch gear or control gear assemblies whereas the movable unit is the unit that is moved into, and moved out from, the fixed unit to plug-in and pug-out the power supply from the electrical connections.
  • Movable units are removed from fixed units for various purposes such as maintenance, repairs and replacement.
  • a number of mechanisms are available in the state of the art which enable the insertion and the withdrawal of a movable unit into and from a fixed unit. One of them, for example, is where maneuvering of the movable unit from the fixed unit is made possible through the use of handles attached to the face of the movable unit coupled with guiding rollers attached to the bottom of the movable unit.
  • This mechanism enables the sliding of the movable unit from the fixed unit when force is being applied by a user.
  • Another available mechanism is where the insertion and the withdrawal of the movable unit into and out of the fixed unit is accomplished through the use of levers and/or springs attached to the movable unit.
  • the movable unit is normally moved forward and backward with the assistance of rollers or using a gliding mechanism.
  • each draw out mechanism an electro mechanical interlocking system is compulsory to prevent unwarranted removal of the draw out mechanisms by third parties.
  • each draw out mechanism should have their tailor made electro mechanical interlocking system that is compatible with their internal mechanisms. This increases the manufacturing cost relating to the draw out mechanisms.
  • the claimed invention provides a mechanism with minimum constituent components that makes the movable unit user friendly and its insertion and withdrawal efficient and swift.
  • any standard electro mechanical interlocking system can be used as the internal mechanisms of the claimed invention are compatible with any interlocking system that is currently available in the market.
  • Figure 1 shows complete views of a movable unit and a fixed unit
  • Figure 4 shows the assembled view of the components
  • Figure 5 shows the movable unit and fixed unit incorporating components contributing to the invention
  • Figure 6 shows the different stages of the movable unit inside the fixed unit with hinged door opened/closed and related wheel/roller positions among wheel/roller guide 1 and 2. Detailed description of the invention
  • the invented operational mechanism for insertion and withdrawal of the movable unit is characterized by the following duly connected components (shown in Figure 02):
  • An arm (2 of Figure 02) (referred to herein as‘Arm F) connected to the hinged door from one end and to a second arm (1 of Figure 02) (referred to herein as‘Arm IF) from the other end,
  • the fixed unit is characterized by the following duly connected components
  • Safety latch (23 of Figure 02, 03, 04 and 05) permanently attached to the inside of the two sides of the side cover of the fixed unit;
  • Hinged door is a door of necessary size and length made with appropriate material. It carries one or more locks, handles, locking latches and hinges. (Shown under 4 of Figures 2, 3, 4 and 5). It is connected to the movable unit with the use of hinges (5 of Figures 2).
  • the hinged door is also connected to the movable unit by the use of a door connecting bracket (3 of Figures 2 and 3) and Arm I (2 of Figure 02).
  • Door connecting bracket is connected to the hinged door from one end and to the Arm I from the other end.
  • the movable unit can be moved backward and forward with the assistance of the wheel/clapboard rolls 1 and 2 (16 and 17 of Figure 5) placed on the base of the fixed unit.
  • Arm I moves backward and when the hinged door is being closed it moves forward.
  • the other parts of the movable unit namely, Arm II, wheel/roller, curved or anchor slot and wheel/roller guide 1 and 2, which are directly and indirectly connected to Arm I, guide this movement.
  • Wheel/Roller (Shown under 6 of Figures 2, 3, 4, 5 and 6) which is made with appropriate material in necessary size rotates around a pin (lal of Figure 3). It enables the movement of the movable unit when the hinged door is being opened or closed. It is connected to the Arm II (2 of Figure 4).
  • the curved or anchor slot (8 of Figure 2) facilitates a guided movement of the wheel/roller.
  • Wheel/roller guide 1 and 2 (9 and 10 of Figure 2) guide the wheel/roller and provide a track in which the wheel/roller has to move when the hinged door is opened or closed.
  • the curved or anchor slot (shown under 8 of Figures 2, 3, 4, 5 and 6) is an opening made in the side casing plate (shown under 7 of Figures 2, 4 and 5) of the movable unit. It provides the wheel/roller a path way to move facilitating a guided movement of the wheel/roller.
  • This component (Shown under 23 of Figures 2, 3, 4, 5 and 6) is made with appropriate material and of necessary size and length in the shape and form as given in 23 of Figure 2. It is permanently fixed to each of the two inside casing plates in order to prevent accidental or unintentional total withdrawal of the movable unit.
  • This component (Shown under 25 of Figures 2, 3, 4 and 5) is made with appropriate material and of necessary size and length in the shape and form as given in 25 of Figure 2. It is fixed as shown on the casing plate in order to indicate the Connected (by Red color), Test (by Yellow color) and Disconnected (by Green color) status of the movable unit. 06.4 Construction of the movable unit
  • the movable unit is constructed by incorporating the hinged door to the movable unit and then connecting Arm I, to the sides of the hinged door, followed by connecting Arm I to Arm II and then connecting each Arm II to the wheel/roller of both sides.
  • the curved or anchor slot is made on left and right sides of the inside casing plates of the movable unit to facilitate the movement of each wheel/ roller.
  • Each of the wheel/roller guide 1 and 2 are permanently fixed to the side covers of the inside of the fixed unit as shown by 9 and 10 of Figures 2,3,4 5 and 6.
  • the rear side of the movable unit carries as usual the plugs for power and control circuits. 5 Method of operation
  • the movable unit with its hinged door (4 of Figure 02) at a closed position is placed at the opening of the fixed unit. Then it is manually pushed towards the back of the fixed unit. The movable unit is guided by the wheel/clapboard rollers 1 and 2 (16 and 17 of Figure 05) and the solid strip (20 of Figure 05). Movable unit is pushed till the rollers (6 of Figure 05) touch the safety latches (23 of Figure 05) on both sides of the fixed unit. At this point the movable unit is at the“Disconnect” position (25 (e) of Figure 05).
  • the hinged door of the movable unit is opened and is again manually pushed to the back of the fixed unit.
  • the wheel/rollers (6 of Figure 05) are placed on the middle of the roller guide 2 ((c) of Figure 06).
  • the plugs for control circuits are engaged with the movable unit and connected to their respective bases but the plugs for power connections are not yet engaged.
  • the movable unit is at the“Test” position (25 (d) of Figure 05). At this point, the hinged door of the movable unit is closed and locked. If required, it is possible to test the operation of the control circuits.
  • the door has to be opened and the movable unit is slightly pushed forward until it stops at the roller guide 1 ((d) of Figure 06) and thereafter the door is closed.
  • the rollers (6 of Figure 05) are pushed against the roller guide 1 ((b) of Figure 06) resulting in a forward movement of the movable unit thus engaging the plugs for power circuits with their respective bases simultaneously.
  • the movable unit is at the“Connected” position ((c) of Figure 05).
  • the hinged door (4 of Figure 02) of the movable unit is opened.
  • the wheel/roller (06 of Figure 02) push themselves against the wheel/roller guide 1 (09 of Figure 02) of both sides. This action results in the backward movement of the movable unit and disengaging the power plugs from their respective bases simultaneously.
  • the movable unit When the hinged door of the movable unit is completely opened, the movable unit can be slightly moved out of the fixed unit manually up to the“Test” position (25 (d) of Figure 05). However, the plugs for control circuit still remain with the respective bases. In this position, wheel/roller (09 of Figure 02) are placed at the middle of the roller guide 2 ((c) of Figure 06).
  • the hinged door needs to be completely opened and the movable unit needs to be completely pulled out of the fixed unit until the rollers are in touch with the safety latch.
  • the safety latch acts as a barrier and prevents any further withdrawal or accidental removals of the movable unit completely from the fixed unit.
  • the movable unit is at the“Disconnected” position (25 (e) of Figure 05).
  • the hinged door of the movable unit needs to be closed again. With the door being closed the wheels/rollers move backward passing the safety latch and thereafter the movable unit can be fully withdrawn and taken out of the fixed unit.
  • the movable unit can be fully withdrawn from the “Connect” position bypassing the“Test” position.

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power-Operated Mechanisms For Wings (AREA)

Abstract

This invention is an operational mechanism for draw out mechanisms for electrical panels ("movable unit") into and from the fixed unit for the purposes of inserting and withdrawal of the movable unit whilst facilitating the engagement and disengagement of electrical power and control circuits characterized by; (i) a hinged door, two arms referred to as Arm I and Arm II, wheel/roller and an opening made in the side casing plate of the movable unit named 'curved or anchor slot'; and (ii) a safety latch, two components named 'wheel / roller guide 1 and 2' permanently attached to the side cover of the fixed unit.

Description

A DRAW OUT MECHANISM FOR ELECTRICAL PANELS
01. Title of invention
A draw out mechanism for electrical panels
02. Field of Invention
This invention relates to Electro-Mechanical Engineering, more particularly draw out mechanisms for electrical panels.
03. Brief description of the invention
In electrical installations/plants, critical electrical machines are in operation. Therefore, in the event a defective part is being identified and needs to be replaced, immediate steps should be taken. In addition, maintenance of the machines needs to be done efficiently, as it is necessary to minimize plant shut down time. To assist immediate replacement of defective parts, draw out mechanisms are being used. Draw out mechanisms assist machine operators to immediately remove the defective device/s using the draw out mechanism and replace it with a new device/s.
The current invention is an operational system for draw out mechanisms for electrical panels (hereinafter referred to as‘movable unit’) into and from the fixed unit for the purposes of inserting or withdrawing the movable unit whilst facilitating the engagement and disengagement of electrical power and control circuits characterized by;
(i) a hinged door, two arms referred to as Arm I and Arm II, wheel/roller and an opening made in the side casing plate of the movable unit named‘curved or anchor slot’; and
(ii) a safety latch, two components named‘wheel / roller guide 1 and 2’ permanently attached to the side cover of the fixed unit.
04. Background and Prior Art
Electric switch gear or control gear assemblies consist of movable and fixed units [(a) and (b) of Figure 1]. Fixed unit is the unit that is fixed permanently to the panel structure of the electrical switch gear or control gear assemblies whereas the movable unit is the unit that is moved into, and moved out from, the fixed unit to plug-in and pug-out the power supply from the electrical connections.
Movable units are removed from fixed units for various purposes such as maintenance, repairs and replacement. As the electric switch gear or control gear assemblies are used in critical industries, it is crucially important to have a mechanism that efficiently enables the insertion and the withdrawal of movable units into and from fixed units. Similarly, the assembling and dismantling of the constituent parts of the movable unit within a short period of time is also imperative. A number of mechanisms are available in the state of the art which enable the insertion and the withdrawal of a movable unit into and from a fixed unit. One of them, for example, is where maneuvering of the movable unit from the fixed unit is made possible through the use of handles attached to the face of the movable unit coupled with guiding rollers attached to the bottom of the movable unit. This mechanism enables the sliding of the movable unit from the fixed unit when force is being applied by a user. Another available mechanism is where the insertion and the withdrawal of the movable unit into and out of the fixed unit is accomplished through the use of levers and/or springs attached to the movable unit. The movable unit is normally moved forward and backward with the assistance of rollers or using a gliding mechanism.
One of the drawbacks in the existing mechanisms is the multiplicity of components that constitute the movable unit and make the insertion and the withdrawal of movable unit cumbersome and time consuming. They contain number of intricate lever and spring systems. Therefore, most often they are prone to system failures and malfunctions. In addition, in an emergency it is challenging to remove the movable unit from the fixed unit due to the availability of intricate mechanisms.
Furthermore, for each draw out mechanism an electro mechanical interlocking system is compulsory to prevent unwarranted removal of the draw out mechanisms by third parties. But each draw out mechanism should have their tailor made electro mechanical interlocking system that is compatible with their internal mechanisms. This increases the manufacturing cost relating to the draw out mechanisms.
In addition, in all draw out panels, it is compulsory that the electrical power circuits are switched off or disconnected before inserting or removing the movable unit from the fixed unit for safety reasons. To facilitate this endevour in most of the existing systems a complicated and tailor made electrical isolations are mounted on the movable unit. This further increases the manufacturing cost of the draw out mechanism.
Against this backdrop, it has become necessary to create a simple mechanism that makes the insertion and the withdrawal of the movable unit efficient and swift and that facilitates user-friendly assembling and dismantling of the constituent elements of the movable unit. The claimed invention provides a mechanism with minimum constituent components that makes the movable unit user friendly and its insertion and withdrawal efficient and swift.
In addition, for the proposed invention any standard electro mechanical interlocking system can be used as the internal mechanisms of the claimed invention are compatible with any interlocking system that is currently available in the market.
Furthermore, the proposed invention does not require a specific electrical isolation device. Brief Description of the drawings
(i) Figure 1 shows complete views of a movable unit and a fixed unit
(ii) Figure 2 shows the components comprising the invented mechanism
(iii) Figure 3 shows fixing accessories relating to the invented mechanism
(iv) Figure 4 shows the assembled view of the components (v) Figure 5 shows the movable unit and fixed unit incorporating components contributing to the invention
(vi) Figure 6 shows the different stages of the movable unit inside the fixed unit with hinged door opened/closed and related wheel/roller positions among wheel/roller guide 1 and 2. Detailed description of the invention
1 Components of the movable unit
The invented operational mechanism for insertion and withdrawal of the movable unit is characterized by the following duly connected components (shown in Figure 02):
(i) A door (4 of Figure 02) with hinges attached to the bottom of the door (5 of Figure
02);
(ii) An arm (2 of Figure 02) (referred to herein as‘Arm F) connected to the hinged door from one end and to a second arm (1 of Figure 02) (referred to herein as‘Arm IF) from the other end,
(iii) Arm II which is connected to Arm I from one end and to a wheel/roller (6 of Figure 02) from the other end,
(iv) A wheel/roller connected to Arm II and placed within an opening (8 of Figure 02) (referred to herein as‘curved or anchor slot’) made on the side casing plate (7 of Figure 02) of the movable unit.
(v) In addition;
(a) An opening made in each side casing plate of the movable unit, named‘curved or anchor slot’ (8 of Figure 02);
(b) Side support (24 of Figure 02) permanently attached to the two side covers of the movable unit;
(c) Status identification sticker (25 of Figure 02) pasted on the side as indicated on movable unit; 2. Components of the fixed unit
The fixed unit is characterized by the following duly connected components;
(i) Side cover of the fixed unit (11 of Figure 2, 3, 4 and 5) consisting of;
(a) Safety latch (23 of Figure 02, 03, 04 and 05) permanently attached to the inside of the two sides of the side cover of the fixed unit;
(b) Guiding rail (22 of Figure 02, 03, 04 and 05) permanently attached to the inside of the two sides of the side cover of the fixed unit;
(c) two components named‘wheel/roller guide 1 and 2’ (9 and 10 of Figure 02) permanently attached to each of the two side covers of the fixed unit from the inside ( 11 of Figure 02) of the electrical switch gear or control gear assemblies [the complete movable unit is given under (a) of Figure 1 while (b) of Figure 1 shows the outer appearance of the common fixed unit] . (ii) Solid strips (20 of Figure 5) placed on the base of the left and rights hand side of the fixed unit consisting of two wheel/clapboard rolls 1 and 2 (16 and 17 of Figure 5);
06.3. Details of individual components
06.3.1. The individual components of the movable unit that contribute to the operation of the claimed invention including the constitution, assembling and function of each of them are explained below.
06.3.2. Hinged Door
Hinged door is a door of necessary size and length made with appropriate material. It carries one or more locks, handles, locking latches and hinges. (Shown under 4 of Figures 2, 3, 4 and 5). It is connected to the movable unit with the use of hinges (5 of Figures 2).
The hinged door is also connected to the movable unit by the use of a door connecting bracket (3 of Figures 2 and 3) and Arm I (2 of Figure 02). Door connecting bracket is connected to the hinged door from one end and to the Arm I from the other end.
The movable unit can be moved backward and forward with the assistance of the wheel/clapboard rolls 1 and 2 (16 and 17 of Figure 5) placed on the base of the fixed unit.
06.3.3. Arm I
This is an arm of necessary size and length made with appropriate material (Shown under 2 of Figures 2, 3, 4 and 5). It is connected to the hinged door by the door connecting bracket (3 of Figures 3 and 4) from one end and to the Arm II (1 of Figures 2, 3, 4 and 5) from the other end.
When the hinged door is being opened, Arm I moves backward and when the hinged door is being closed it moves forward. The other parts of the movable unit, namely, Arm II, wheel/roller, curved or anchor slot and wheel/roller guide 1 and 2, which are directly and indirectly connected to Arm I, guide this movement.
06.03.4 Arm II
This is a slightly bended arm of necessary size and length made with appropriate material (Shown under 1 of Figures 2, 3, 4 and 5). It is connected to Arm I from one end and to wheel/roller (Shown under 6 of Figures 2, 3, 4 and 5) from the other end.
Whilst the hinged door is being closed, Arm I moves forward pushing along with it Arm II and then moving the wheel/roller forward and whilst the hinged door is being opened Arm I moves backward carrying along with it Arm II and then moving the wheel/roller backward. 06.03.5 Wheel/Roller
Wheel/Roller (Shown under 6 of Figures 2, 3, 4, 5 and 6) which is made with appropriate material in necessary size rotates around a pin (lal of Figure 3). It enables the movement of the movable unit when the hinged door is being opened or closed. It is connected to the Arm II (2 of Figure 4).
The curved or anchor slot (8 of Figure 2) facilitates a guided movement of the wheel/roller. Wheel/roller guide 1 and 2 (9 and 10 of Figure 2) guide the wheel/roller and provide a track in which the wheel/roller has to move when the hinged door is opened or closed.
06.3.6. Curved or Anchor Slot
The curved or anchor slot (shown under 8 of Figures 2, 3, 4, 5 and 6) is an opening made in the side casing plate (shown under 7 of Figures 2, 4 and 5) of the movable unit. It provides the wheel/roller a path way to move facilitating a guided movement of the wheel/roller.
06.3.7. Wheel/Roller Guide 1 and 2
These two components (Shown under 9 and 10 of Figures 2,3,4 5 and 6) are made with appropriate material and of necessary size and length in the shape and form as given in 9 and 10 of Figure 2 and of Figure 06 in particular. They are permanently fixed to the side cover of the inside of the fixed unit (11 of Figures 2, 3, 4, 5 and 6). They guide the wheel/ roller to move up and down on their tracks and to enable engagement and disengagement of the movable unit.
06.3.8. Safety Latch
This component (Shown under 23 of Figures 2, 3, 4, 5 and 6) is made with appropriate material and of necessary size and length in the shape and form as given in 23 of Figure 2. It is permanently fixed to each of the two inside casing plates in order to prevent accidental or unintentional total withdrawal of the movable unit.
06.3.9. Guiding Rail and Side Support
These two components (Shown under 22 and 24 of Figures 2, 3, 4, 5 and 6) are made with appropriate material and of necessary size and length in the shape and form as given in 22 and 24 of Figure 2. Guiding Rail is permanently fixed to each of the two inside side cover of the fixed unit. Side Support is permanently fixed to the outside of the casing plates of the movable unit. These guiding rails and supports are used to move the moveable unit inside the fixed unit easily and to maintain the alignment of two units while moving in and out.
06.3.10. Status Identification Sticker
This component (Shown under 25 of Figures 2, 3, 4 and 5) is made with appropriate material and of necessary size and length in the shape and form as given in 25 of Figure 2. It is fixed as shown on the casing plate in order to indicate the Connected (by Red color), Test (by Yellow color) and Disconnected (by Green color) status of the movable unit. 06.4 Construction of the movable unit
The movable unit is constructed by incorporating the hinged door to the movable unit and then connecting Arm I, to the sides of the hinged door, followed by connecting Arm I to Arm II and then connecting each Arm II to the wheel/roller of both sides. The curved or anchor slot is made on left and right sides of the inside casing plates of the movable unit to facilitate the movement of each wheel/ roller. Each of the wheel/roller guide 1 and 2 are permanently fixed to the side covers of the inside of the fixed unit as shown by 9 and 10 of Figures 2,3,4 5 and 6. The rear side of the movable unit carries as usual the plugs for power and control circuits. 5 Method of operation
Forward movement of the movable unit
Disconnect Position of the movable unit
The movable unit with its hinged door (4 of Figure 02) at a closed position is placed at the opening of the fixed unit. Then it is manually pushed towards the back of the fixed unit. The movable unit is guided by the wheel/clapboard rollers 1 and 2 (16 and 17 of Figure 05) and the solid strip (20 of Figure 05). Movable unit is pushed till the rollers (6 of Figure 05) touch the safety latches (23 of Figure 05) on both sides of the fixed unit. At this point the movable unit is at the“Disconnect” position (25 (e) of Figure 05).
Test Position of the movable unit
At the“Disconnect” position the hinged door of the movable unit is opened and is again manually pushed to the back of the fixed unit. At this position the wheel/rollers (6 of Figure 05) are placed on the middle of the roller guide 2 ((c) of Figure 06). The plugs for control circuits are engaged with the movable unit and connected to their respective bases but the plugs for power connections are not yet engaged. The movable unit is at the“Test” position (25 (d) of Figure 05). At this point, the hinged door of the movable unit is closed and locked. If required, it is possible to test the operation of the control circuits.
Connected position of the movable unit
To engage the power connections, the door has to be opened and the movable unit is slightly pushed forward until it stops at the roller guide 1 ((d) of Figure 06) and thereafter the door is closed. When the door is being closed the rollers (6 of Figure 05) are pushed against the roller guide 1 ((b) of Figure 06) resulting in a forward movement of the movable unit thus engaging the plugs for power circuits with their respective bases simultaneously. The movable unit is at the“Connected” position ((c) of Figure 05).
Thereafter the hinged door is closed for safety purposes using the door interlocking system (14 of Figure 02).
Alternatively, it is possible to directly insert the movable unit into the fixed unit bypassing the“Test” position. Backward movement of the movable unit
To proceed with the withdrawal of the movable unit from the fixed unit, the hinged door (4 of Figure 02) of the movable unit is opened. When the hinged door is being opened, the wheel/roller (06 of Figure 02) push themselves against the wheel/roller guide 1 (09 of Figure 02) of both sides. This action results in the backward movement of the movable unit and disengaging the power plugs from their respective bases simultaneously.
When the hinged door of the movable unit is completely opened, the movable unit can be slightly moved out of the fixed unit manually up to the“Test” position (25 (d) of Figure 05). However, the plugs for control circuit still remain with the respective bases. In this position, wheel/roller (09 of Figure 02) are placed at the middle of the roller guide 2 ((c) of Figure 06).
To completely withdraw the movable unit from the Test Position, the hinged door needs to be completely opened and the movable unit needs to be completely pulled out of the fixed unit until the rollers are in touch with the safety latch. The safety latch acts as a barrier and prevents any further withdrawal or accidental removals of the movable unit completely from the fixed unit. At this position the movable unit is at the“Disconnected” position (25 (e) of Figure 05).
To move beyond the position of the safety latch, the hinged door of the movable unit needs to be closed again. With the door being closed the wheels/rollers move backward passing the safety latch and thereafter the movable unit can be fully withdrawn and taken out of the fixed unit.
It should also be noted that alternatively the movable unit can be fully withdrawn from the “Connect” position bypassing the“Test” position.

Claims

Claims
1. A draw out mechanism for electrical panels, comprising of;
a. A movable unit containing a hinged door, two arms referred to as Arm I and Arm II, wheel/roller and an opening made in the side casing plate of the movable unit named ‘curved or anchor slot’; and
b. A safety latch, two components named‘wheel / roller guide 1 and 2’ permanently attached to the side cover of the fixed unit.
2. A draw out mechanism for electrical panels, claimed in (1) above wherein the movable unit consisting of a hinged door which is connected from both sides by Arm I and Arm II, a wheel/roller connected to Arm II whereby the wheel/roller moves along the curved or anchor slot’ when the hinged door is being closed or opened;
3. A draw out mechanism for electrical panels, claimed in (1) above wherein the fixed unit contains a safety latch, guiding rail and wheel/roller guide 1 and 2 and solid strip which enables the insertion or withdrawal of the movable unit from the fixed unit;
4. A draw out mechanism for electrical panels, claimed in ( 1 ) above wherein the safety latch and the wheel/roller guide 1 and 2 permanently attached to the fixed unit, the combination of which enables the insertion and withdrawal of the movable unit form the fixed unit is done securely.
5. A draw out mechanism for electrical panels, claimed in (1) above wherein the movable unit, consists of a hinged door which is connected by Arm I and Arm II which enables the opening and the closing of the hinged door, whilst withdrawing or inserting the movable unit.
PCT/IB2018/053504 2018-05-18 2018-05-18 A draw out mechanism for electrical panels WO2019220183A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/053504 WO2019220183A1 (en) 2018-05-18 2018-05-18 A draw out mechanism for electrical panels

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2018/053504 WO2019220183A1 (en) 2018-05-18 2018-05-18 A draw out mechanism for electrical panels

Publications (1)

Publication Number Publication Date
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Family Applications (1)

Application Number Title Priority Date Filing Date
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH099425A (en) * 1995-06-22 1997-01-10 Mitsubishi Electric Corp Small-sized low-voltage switchboard
US20030002261A1 (en) * 2001-06-29 2003-01-02 Intel Corporation Rack-mounted server and associated methods
JP2007336763A (en) * 2006-06-19 2007-12-27 Fuji Electric Fa Components & Systems Co Ltd Switch gear
US20080078659A1 (en) * 2006-09-29 2008-04-03 Paul Kimball Parker Compact integral rotational drawout stop device with linear permissive
US20170264084A1 (en) * 2016-03-11 2017-09-14 9088-5625 Quebec Inc. Circuit breaker positioning system and method for connection and disconnection thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH099425A (en) * 1995-06-22 1997-01-10 Mitsubishi Electric Corp Small-sized low-voltage switchboard
US20030002261A1 (en) * 2001-06-29 2003-01-02 Intel Corporation Rack-mounted server and associated methods
JP2007336763A (en) * 2006-06-19 2007-12-27 Fuji Electric Fa Components & Systems Co Ltd Switch gear
US20080078659A1 (en) * 2006-09-29 2008-04-03 Paul Kimball Parker Compact integral rotational drawout stop device with linear permissive
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