JP2002271921A - Cubicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cubicle which enables safe drawing-out and handling of a unit and is small in size and low in cost. SOLUTION: This cubicle has a housing having a horizontal element (84), a unit 2 which comprises a square chassis and electric circuits housed in the chassis and placed on the horizontal element (84) so as to be able to draw out horizontally, and a locking mechanism (87) which prevents the unit 2 from being drawn out horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cubicle such as a power converter, and more particularly to a cubicle in which an electric circuit divided into arbitrary units as required is housed in a rectangular chassis so that a unit unit can be pulled out. About.

[0002]

2. Description of the Related Art The purpose of the present invention is to provide an inexpensive cubicle to the market by reducing the manufacturing cost by the ease of assembly and the parallelization of processes, and to satisfy the market needs for downsizing of the cubicle and easy maintenance. In general, a method of dividing an electric circuit into arbitrary units as necessary to form a unit unit, and housing a plurality of unit units in a housing to form a cubicle is generally used. The unit of division varies depending on the purpose and circuit configuration described above,
Generally, when the mass of the unit exceeds 20 kg, a mechanism for drawing out is provided in consideration of easy maintenance and safety, and further, a structure is adopted in which the unit is removed using a lifter.

FIG. 7 shows an example of a divided circuit constituting the unit unit 2 described above. The unit unit 2 includes an input terminal 10, an input fuse 11, a rectifier 20, a smoothing circuit 30, an inverter circuit 40, and an output terminal 14. FIG. 8 shows a physical configuration of the unit unit 2. That is, the rectifier 2 is provided inside the rectangular chassis 50.
0, a smoothing circuit 30, and an inverter circuit 40, and an input terminal 10, an input fuse 11, and an output terminal 14 are provided on the front surface of the rectangular chassis 50. The rectifier 20 and the inverter circuit 40 are mounted on the cooling fin 51. The mass of the unit unit 2 shown in this example is about 40 kg.

FIG. 9 is a view showing an example of a state in which the unit of FIG. 8 is stored in a cubicle. Unit 2
Are screwed to a slide rail 61 attached to a structural member 60 provided inside the cubicle 1. Also,
A stopper 83 for physically fixing the unit 2 is screwed to the unit 2 and the structural member 60.

[0005] In the cubicle 1 having the structure shown in Fig. 9, a procedure for removing the unit unit 2 for maintenance is as follows. That is, the lifter 80 is arranged in front of the unit 2 to be removed, and
After aligning the arm 81 with the bottom surface of the unit unit 2, the stopper 83 is removed, and the unit unit 2 is pulled out forward and mounted on the arm 81. In this state, a fixing screw 82 for fixing the unit 2 to the slide rail 61 is used.
To separate the unit 2 from the cubicle 1. Thereafter, the slide rail 61 is pushed back into the cubicle 1 so that the unit 2 is completely lifted by the lifter 80.
After being supported by the arm 81
And lower the unit 2 on the floor.

FIG. 10 is a view showing another example of a state in which the unit unit 2 of FIG. In this example, a tray 84 for mounting the unit 2 on the structural material 60 provided inside the cubicle 1 is provided, and wheels 85 are provided on the bottom of the unit 2. The unit unit 2 is placed on a tray 84 via wheels 85, and is physically fixed to the structural material 60 of the cubicle 1 by a stopper 83.

The procedure for removing the unit unit 2 for maintenance in the cubicle 1 having the structure shown in FIG. 10 is as follows. That is, the lifter 80 is arranged in front of the unit 2 to be removed, and
After aligning the arm 81 with the bottom surface of the unit unit 2, the stopper 83 is removed, and the unit unit 2 is pulled out forward and mounted on the arm 81 of the lifter 80. After the unit unit 2 is completely supported by the arm 81,
The arm 81 is lowered, and the unit 2 is lowered to the floor.

[0008]

SUMMARY OF THE INVENTION As shown in FIG.
The configuration in which the unit unit 2 is housed in the cubicle 1 via the slide rail 61 is generally used because of its good maintainability and ease of use in that required functions are grouped as one structure. Widely used. As shown in FIG. 11, if the unit 2 is fixed to the slide rail 61 via the L-shaped support 62, the unit 2 is lifted by the lifter 80 even when the unit 2 is pulled out from the cubicle 1. If not, the unit 2 cannot be removed, and there is an advantage that the danger of unintentional accidental drop of the unit 2 can be considerably reduced.

On the other hand, since the slide rail 61 is vulnerable to stresses other than in the vertical direction, in order to minimize the moment with respect to the slide rail 61 when the unit unit 2 is pulled out, as shown in FIG. Place near the horizontal line passing through the center of gravity. Unit 2
In order to secure a space required for screwing for fixing the L-shaped support 62 and the unit unit 2,
The slide rail 61 and the L-shaped support 62 protrude from both side surfaces of the unit unit 2, and the upper and lower sides of the slide rail 61 become dead spaces, which hinders miniaturization of the cubicle.

On the other hand, as shown in FIG. 10, in the structure in which the wheels 85 provided in the unit unit 2 are mounted on the tray 84 provided in the cubicle 1, the dead space is reduced compared to the structure of FIG. However, when the stopper 83 is removed, the unit unit 2 can be freely taken in and out, and when the lifter 80 is not properly arranged or when the unit unit 2 is pulled out carelessly, the unit unit 2 may drop. There is a risk of causing an accident such as breakage of the unit unit 2 or injury to an operator. Therefore, an object of the present invention is to provide a small and inexpensive cubicle that can safely pull out and handle a unit unit.

[0011]

In order to achieve the above object, the invention according to claim 1 comprises a housing having a horizontal member, and an electric circuit housed in a rectangular chassis. The unit includes a unit that can be pulled out and a lock mechanism that prevents the unit from being pulled out in the horizontal direction.

According to the present invention, the dead space is reduced to contribute to the miniaturization of the cubicle, and the unit is prevented from being carelessly pulled out when the lock mechanism releasing jig is not properly arranged. It is possible to prevent accidents such as breakage of the unit due to dropping of the unit and injury to the operator.

According to a second aspect of the present invention, in the cubicle of the first aspect, the lock mechanism is configured to automatically function by the weight of the unit unit. According to the present invention, it is possible to prevent the lock mechanism from being inoperative due to a human error in operation, to prevent the unit from being pulled out carelessly, and to prevent damage to the unit due to dropping of the unit and injury to the operator. Accidents can be prevented.

According to a third aspect of the present invention, in the cubicle of the first or second aspect, the lock mechanism is constituted by a part of the unit unit and a part of the horizontal member provided in the housing. ADVANTAGE OF THE INVENTION According to this invention, the mechanism required in order to prevent pulling out a unit unit carelessly is reduced, and it contributes to size reduction and cost reduction of a cubicle.

According to a fourth aspect of the present invention, in the cubicle according to the third aspect, the horizontal member is arranged on the upper surface of the support shelf provided in the housing in parallel with the direction in which the unit is pulled out horizontally, and has a predetermined thickness. The unit unit is mounted on the spacer rail via one or a plurality of rotators or rubbing members provided before and after each of the unit units on the chassis bottom with respect to the pullout direction with respect to the center of gravity line, and a lock mechanism, When the unit unit is pulled out by a predetermined distance, the rotating unit or the rubbing member on the near side with respect to the drawing direction of the plurality of rotating bodies or the rubbing members is separated from the spacer rail by the unit unit. Is formed by contacting a part of the support shelf.

According to the present invention, the dead space is reduced by reducing the volume occupied by the mechanism relating to the lock mechanism.
In addition to contributing to the miniaturization of the cubicle, it also prevents the unit from being pulled out carelessly when the lock mechanism release jig is not properly placed, preventing damage to the unit due to dropping of the unit and injury to workers. Accidents can be prevented.

According to a fifth aspect of the present invention, in the cubicle according to the fourth aspect, the distal end of the spacer rail is disposed at a predetermined distance from the distal end of the support shelf toward a back side opposite to the unit unit withdrawal direction, By pulling out the unit unit by a predetermined distance, when the rotating body or the rubbing member on the near side with respect to the drawing direction of the rotating body or the rubbing member comes off the spacer rail, the rotating body on the near side is Alternatively, a lock mechanism is formed by contacting a part of the unit unit located before the rubbing member with the support shelf.

According to the present invention, the degree of inclination of the unit unit when the rotating body or the sliding member on the front side comes off the spacer rail is reduced, and the danger of the unit unit falling forward is eliminated. Can be.

According to a sixth aspect of the present invention, in the cubicle of the fourth or fifth aspect, an arm of a lifter for removing a unit unit is arranged on an extension of the spacer rail, and a plurality of rotating members or sliding members are provided. Of these, the lock mechanism is released by preventing the two rotating members or the rubbing members on the near side with respect to the pull-out direction from coming off the spacer rails and dropping by a predetermined thickness of the spacer rails. Configuration.

According to the present invention, when the lifter is properly arranged, the unit can be pulled out without requiring any special operation, and the maintainability of the unit can be improved.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A cubicle according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG.
In the cubicle of the present embodiment, the support shelf 63 on which the unit unit is placed has a tray 84 made of a flat plate having a front and rear bend for strengthening. And two spacer rails 64 made of a flat plate having a predetermined thickness. The left and right ends of the tray 84 have a bend having a screw hole for physically coupling with the structural material of the cubicle or the like.

As shown in FIG. 2, the unit unit 2 includes a rectangular chassis 50, an input terminal 10, an input fuse 11, and an output terminal 14 disposed on the front of the rectangular chassis 50.
And houses therein the electric circuit shown in FIG.

On the bottom of the rectangular chassis 50, a ball-shaped rotating body and a ball caster 86, which is a base for supporting and fixing the rotating body, are provided one each in front, rear, left and right as viewed from the front, for a total of four. There are attached. Further, the bottom plate of the chassis 50 is bent so as to form a projection 87 that is convex in the front-rear direction at the center. The projection 87 has a predetermined gap 89 with respect to the ground position of the ball caster 86.
It is constituted so that it may have.

FIG. 3 shows a state where the unit unit 2 is placed on the support shelf 63. That is, the ball casters 86 of the unit 2 are mounted on the spacer rails 64.
FIG. 3B shows the state where the unit unit 2 is housed in the cubicle from the left side. From this state, the unit unit 2 is moved forward (to the right in the figure) to the center line of the front ball caster 86a. When the ball caster 86a is pulled out by a distance 88 from the tip of the spacer rail 64, the front ball caster 86a comes off the spacer rail 64.

FIG. 4 is a right side view showing a state in which the front ball caster 86a has come off the spacer rail 64. As shown in FIG. 4, the front ball caster 86a
The predetermined gap 89 is determined so that the protrusion 87 at the bottom of the unit unit 2 directly contacts the tray 84 at a position where the ball caster 86a does not directly rest on the tray 84 when the ball comes off the spacer rail 64. . Protrusion 87
Is in direct contact with the tray 84, so that the operation of pulling out the unit unit 2 is stopped (locked) due to friction between the two.

FIG. 5 is a right side view showing a state in which the elevating lifter 80 is arranged at a predetermined position when the unit unit 2 is pulled out. The lifter 80 includes an elevating arm 81, and a claw 90 having the same thickness as the spacer rail 64 on the tray 84 is attached to a tip of the arm 81. In the state shown in FIG. 3, as shown in FIG. 5, the lifter 80 and the arm 81 are arranged at a position where the claw 90 of the arm rests on the tray 84 and the tip of the claw 90 of the arm contacts the tip of the spacer rail 64. When the unit unit 2 is pulled forward in this state, the ball caster 86a in front of the unit unit 2 moves from the spacer rail 64 to the claw 90 of the arm at the same height, and the unit unit 2
The projection 87 at the lower portion of the frame remains at the predetermined gap 89, and the locking function does not work.

In the present embodiment, the projection 87 is formed by bending the floorboard, but the projection 87 may have any structure as long as it can secure a predetermined gap 89 and secure the strength. , Does not restrict its configuration at all. Further, in the present embodiment, the projection 87 is provided to be in contact with the tray 84, but this is determined by the height of the ball caster 86. A predetermined gap 89 which is inevitably determined by the gap between the floor of the unit unit 2 and the tray 84, the angle between the unit unit 2 and the tray 84 at the time of locking which is determined by the longitudinal distance between the ball casters 86 and the thickness of the spacer rail 64. When the distance between the front ball caster 86a and the front surface of the unit unit 2 is sufficient, the projection 87 is not provided.
A configuration in which the floor surface of the unit unit 2 directly contacts the tray 84 may be adopted.

In the cubicle of the present embodiment,
The dead space in the cubicle can be reduced to reduce the size of the cubicle.Also, if the lifter is not properly positioned, it can be prevented from accidentally pulling out the unit, and the unit may be damaged or damaged due to dropping of the unit Accidents such as injury to the elderly can be prevented. In addition, it is possible to prevent the lock mechanism from being inoperative due to a manual operation error, and to prevent the unit unit from being carelessly pulled out. In addition, the number of mechanisms required to prevent the unit from being pulled out carelessly is small, which contributes to miniaturization and cost reduction of the cubicle. Furthermore, by reducing the capacity of the mechanism related to the lock mechanism to reduce the dead space and downsizing of the cubicle, it is also possible to prevent the unit from being pulled out carelessly when the lifter is not properly arranged. Serious accidents such as damage to the unit and injury to the operator due to the unit falling can be prevented. When the lifter is properly positioned, the unit can be pulled out without any special operation, and the maintainability of the unit can be improved.

FIG. 6 is a right side view showing another embodiment of the present invention, in which a unit stopper 91 is provided on the front side of a tray 84. As shown in FIG. 6, not only the protrusion 87 directly contacts the tray 84 but also the pullout operation of the unit unit 2 is more positively stopped (locked) by the protrusion 87 hitting the unit stopper 91 provided on the tray 84. ) Is done. Also in the cubicle of this embodiment, reduction in size and cost and improvement in safety when handling the unit can be obtained.

[0030]

According to the present invention, there is provided a cubicle having a housing having a horizontal member, a unit unit in which an electric circuit is housed in a rectangular chassis and provided on the horizontal member so as to be drawn out in a horizontal direction. With a lock mechanism that prevents the unit from being pulled out in the horizontal direction,
The dead space can be reduced to reduce the size of the cubicle, and the unit can be prevented from being accidentally pulled out when the lock mechanism release jig is not properly arranged, and the unit can be dropped by dropping the unit. It is possible to prevent accidents such as breakage of the vehicle and injuries to workers.

[Brief description of the drawings]

FIG. 1 shows a tray in a cubicle according to an embodiment of the present invention, wherein (a) is a plan view, (b) is a front view, and (c).
Is a side view.

2A and 2B show a unit unit in the cubicle according to the embodiment of the present invention, wherein FIG. 2A is a front view and FIG. 2B is a side view.

FIGS. 3A and 3B show a state in which unit units are placed on a tray in the cubicle according to the embodiment of the present invention, wherein FIG. 3A is a front view and FIG.

FIG. 4 shows a state in which drawing out of a unit is stopped in the cubicle according to the embodiment of the present invention;
2 is an overall view, and FIG. 2B is an enlarged view of a portion b of FIG.

FIG. 5 shows a state of pulling out a unit unit by a lifter in the cubicle according to the embodiment of the present invention;
(A) is an overall view, and (b) is an enlarged view of a part b of (a).

FIG. 6 shows a state in which withdrawal of a unit is stopped in a cubicle according to another embodiment of the present invention;
(A) is an overall view, (b) is an enlarged view of a part (b) of (a).

FIG. 7 is a diagram showing an example of an electric circuit constituting a unit in a conventional cubicle.

8A and 8B show a unit unit in a conventional cubicle, wherein FIG. 8A is a front view and FIG. 8B is a side view.

FIG. 9 is a view showing a state in which a unit is pulled out by a lifter in a conventional cubicle.

FIG. 10 is a diagram showing another example of a state where a unit is pulled out by a lifter in a conventional cubicle.

11A and 11B show a locking mechanism of a unit unit in a conventional cubicle, wherein FIG. 11A shows a locked state, and FIG. 11B shows a released state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... cubicle, 2 ... unit unit, 10 ... input terminal, 11 ... input fuse, 14 ... output terminal, 20 ... rectifier, 30 ... smoothing circuit, 40 ... inverter circuit, 50 ... square chassis, 51 ... cooling fin, 60 ... Structural materials, 61
... Slide rail, 62 ... L-shaped support, 63 ... Support shelf, 64 ... Spacer rail, 80 ... Lifter, 81 ... Arm, 82 ... Fixing screw, 83 ... Stopper, 84 ... Tray, 85 ... Wheel, 86 ... Ball caster 86a: forward ball caster, 87: projection, 88: distance between the center line of the forward ball caster and the tip of the spacer rail, 89: predetermined gap, 90: arm claw, 91: unit stopper.

Claims (6)

[Claims] 1. A housing having a horizontal member, a unit unit which houses an electric circuit in a rectangular chassis and is provided on the horizontal member so as to be able to be drawn out in the horizontal direction, A cubicle comprising a lock mechanism for preventing a drawer. 2. The cubicle according to claim 1, wherein the lock mechanism automatically functions by the weight of the unit unit. 3. The cubicle according to claim 1, wherein the lock mechanism includes a part of the unit unit and a part of a horizontal member provided in the housing. 4. The horizontal member includes a spacer rail having a predetermined thickness disposed in parallel with a direction in which the unit unit is horizontally pulled out on an upper surface of a support shelf provided in the housing, and the unit unit is provided on a bottom of the chassis in a drawing direction. On the other hand, it is placed on the spacer rail via a rotating body or a rubbing member provided one or more each before and after the center of gravity line, and the lock mechanism pulls out the unit unit by a predetermined distance, Of the plurality of rotators or rubbing members, a part of the unit unit comes into contact with the support shelf by the rotator or the rubbing members on the near side with respect to the pull-out direction coming off the spacer rail. The cubicle according to claim 3, wherein the cubicle is formed. 5. A rotating body, wherein a distal end of a spacer rail is disposed at a predetermined distance from a distal end of a supporting shelf toward a back side opposite to a pulling-out direction of a unit, and the unit is pulled out by a predetermined distance. Alternatively, of the rubbing members, when the rotating body or the rubbing member on the front side with respect to the pull-out direction is disengaged from the spacer rail, the unit unit is located on the front side with respect to the rotating body or the rubbing member on the near side. The lock mechanism is formed by a part contacting the support shelf.
The cubicle described. 6. An arm of a lifter for removing a unit unit is disposed on an extension of the spacer rail, and two of the plurality of rotating members or rubbing members are located on the near side with respect to the pull-out direction. 6. The cubicle according to claim 4, wherein the locking mechanism is released by preventing the body or the sliding member from coming off the spacer rail and dropping by a predetermined thickness of the spacer rail.