JPH07274319A - Unit draw-out structure for electric control board - Google Patents

Abstract

PURPOSE:To provide a unit draw-out structure in which a roller is not removed from a guide rail even for undue operating force at the time of moving the unit. CONSTITUTION:A unit positioning mechanism 70 is set on a unit base 13 mounting an electric machine. The interlock lever 7F of the positioning mechanism 70 is engaged with a floor stopper 80 at more than one point in the breadthwise direction of the unit and the outer diameter of a roller 6E is set two times or more of the diameter of roller groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unit structure of an electric control panel, and in particular, a unit stand on which electric equipment such as a circuit breaker is mounted is housed in a stackable state by a roller and a guide rail so as to be freely inserted into and removed from the electric control panel. It was done.

[0002]

2. Description of the Related Art FIG. 9 is an overall perspective view showing a switchboard for accommodating a plurality of units including a circuit breaker and the like. In the figure, a plurality of units 2 each having a circuit breaker or the like mounted therein are housed in a switchboard 1 in a vertically stacked state.
When the door 3 is opened, the grip handle 4 attached to the front surface of the unit 2 appears, and an operator grips the grip handle 4 to pull out or insert the unit 2.
On the other hand, the floor frame 5 shields each unit 2 from above and below, and both ends of the floor frame 5 are bent in a U-shape to form guide rails 5A at their tips. The roller 6 attached to 2 moves rotatably. Reference numeral 7 is a unit positioning mechanism (lever) described later.

FIG. 10 is a plan view of the unit 2 as seen from above, and FIG. 11 is a side sectional view of FIG. In the figure, 2A is a circuit breaker main body, 5B is an extension rail used when the circuit breaker 2A is taken out of the switchboard, 8 is a floor stopper for engaging the positioning mechanism 7 and positioning the unit 2, 1
1 is a power grip for supplying power to the circuit breaker 2A,
It has a biting structure depending on the unit moving type.
12 is a roller stopper that regulates the position when the unit 2 is inserted, 20 is a power fuse that interrupts a fault current that has occurred on the circuit, and 30 is a secondary current corresponding to the energizing current to the instruments while energizing the circuit current. A current transformer 40 is a porcelain insulator which holds a blade 50 into which the current grip 11 is bitten.

FIG. 12 is a front view of the unit 2. A roller mounting plate 14 is installed at both ends of the unit base 13, and a roller 6 is rotatably mounted on the roller mounting plate 14. In addition, the unit positioning mechanism 7
Is attached to the unit base 13 and is combined with a floor stopper 8 provided on the floor frame 5 to enable the positioning of the unit 2 as described later. 5C is a floating prevention frame for preventing the lifting of the unit base 13.

FIG. 13 is an enlarged front view of the roller mounting portion. The roller 6 includes roller mounting bolts 6A, washers 6B,
It is attached to the roller mounting plate 14 by the nut 6C, and the roller mounting plate 14 is fixed to the end of the unit base 13. Then, the roller 6 rolls on the guide rail 5A in which the floor frame 5 is bent in a U shape, and the unit base 13 can be moved by the sliding of the roller 6. In addition,
FIG. 14 is an assembled perspective view showing a roller mounting portion.

FIG. 15 is an assembly perspective view showing a member structure of the unit positioning mechanism 7 and the floor stopper 8. A lever mounting frame 7B is screwed to the unit base 13, and a pin 70 is centrally attached to the lever mounting frame 7B. The pin 70 is welded and the pinhole spring 7C is inserted.
One end of the pinion spring 7C is attached to the unit base 13 and the other end is inserted into the unit interlock lever 7A, so that the unit interlock lever 7A is always elastically urged downward. Also, the unit interlock lever 7
A pin 70 of the lever mounting frame 7B is inserted into one end of A so that the split pin 7G prevents the pin 70 from coming off. Further, a positioning lever 7D is attached to the tip of the unit interlock lever 7A.
The front end portion 71 of D projects to the front of the unit and is operated by the operator. On the other hand, the lower projection 72 of the unit interlock lever 7A has positioning holes 8A (unit insertion position), 8B provided in the floor stopper 8.
It is configured to be inserted into the (unit pull-out position) to position the unit 2.

Next, the operation of the above device will be described. An operator pulls out or inserts the unit 2 by gripping the grip handle 4 of the unit 2. That is, the roller 6 is rotatably attached to the unit base 13 via the roller attaching plate 14, and the roller 6 smoothly rolls on the guide rail 5A by the operator's input from the grip handle 4 to move the unit 2 to the unit 2. To move. On the other hand, a floor stopper 8 for positioning the unit 2 is installed on the floor frame 5,
The floor stopper 8 is provided with positioning holes 8A and 8B. 16 is a side view showing an engaged state of the unit positioning mechanism 7 and the floor stopper 8 when the unit is inserted, and FIG. 17 shows a cross section XX of FIG. In the figure,
The unit interlock rod 2B is a member of the circuit breaker 2A, and when the circuit breaker 2A is kept in a vertical state in an operating state, even if the operator lifts the position lever 7D to move the unit 2, the unit interlock rod 2B.
And the upper end of the unit interlock lever 7A contact each other, and the positioning lever 7D does not move. FIG. 18 is a side view showing the relationship between the unit positioning mechanism 7 and the floor stopper 8 when pulling out the unit. When the circuit breaker 2A is in the stopped state, the unit interlock rod 2B can rotate in the clockwise direction. The upper end of the unit interlock lever 7A and the unit interlock rod 2B are disengaged, the positioning lever 7D can be lifted, and the unit 2 can be moved. That is, the circuit breaker 2A
16 in the operating state, the unit 2 cannot move, and in FIG. 18 in which the circuit breaker 2A is stopped, the unit 2 can move.

[0008]

The unit structure of the conventional electric control panel is constructed as described above, and the arrangement of the unit positioning mechanism 7 and the floor stopper 8 is deviated from the center due to the arrangement of the equipment constituting the unit 2. There are many (shifted to the left in the figure). Further, the movement of the unit 2 is due to the human power of the operator, and the unit positioning mechanism 7
And the floor stopper 8 come into contact with each other, and a shock is applied to the unit 2. Further, when the unit is inserted, the roller 6 and the roller stopper 12 come into contact with each other. By the above, when the unit 2 is pulled out or inserted, an impact force is applied to the entire unit, and the unit 2 vibrates vertically. Further, since the unit positioning mechanism 7 and the floor stopper 8 are displaced from the center, there is a risk that the entire unit will move laterally and the roller 6 and the guide rail 5A will be disengaged.

The present invention has been made to solve the above problems, and an object thereof is to provide a unit structure of an electric control panel in which a roller does not come off from a guide rail when the unit is moved.

[0010]

In the unit drawing structure of the electric control panel of the present invention, a positioning mechanism 70 for positioning the unit 2 is installed on the unit base 13, and a positioning mechanism 80 of the positioning mechanism 80 is provided on the floor frame 5 of the electric control panel. A floor stopper 80 with which the interlock lever 7F is engaged is provided, and the interlock lever 7F and the floor stopper 80 are engaged and contacted at at least two locations in the unit width direction.

Further, the outer diameter dimension (D1) of the pair of rollers, the inner diameter dimension (D2) of the pair of rollers, or the outer diameter dimension (D1) and the inner diameter dimension (D2) are twice or more than the groove diameter (d) of the rollers. It is a big one.

Further, a preventive frame 15 for preventing roller dislodgement is provided outside the roller 6.

Further, an elastic member 6D corresponding to the prevention frame 15 is attached.

[0014]

According to the unit withdrawal structure of the electric control panel of the present invention, the interlock lever 7F and the floor stopper 80 contact each other at two or more positions in the width direction of the unit panel. It is possible to prevent lateral shake of the. Also, interlock lever 7F
Since the impact force of the contact between the floor stopper 80 and the floor stopper 80 is distributed to two points, the vertical swing of the unit base 13 can be minimized. Therefore, the roller 6 is prevented from coming off from the guide rail 5A bent in a U shape.

Further, the outer diameter dimensions (D1) of the rollers, the inner diameter dimensions (D2) of the rollers, or the outer diameter dimensions (D1) and the inner diameter dimensions of the rollers.
Since (D2) is twice or more larger than the groove diameter (d) of the roller, even if the unit base 13 shakes laterally or vertically, it does not come off from the guide rail 5A.

Further, by providing the prevention frame 15, it is possible to prevent the roller 6 from coming off.

Further, by providing the rubber stopper 6D, it is possible to prevent the roller 6 from coming off and to alleviate the impact force when the roller 6 comes into contact with the prevention frame 15.

[0018]

【Example】

Example 1. Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a unit drawing device according to the present embodiment, in which roller mounting plates 14 are provided at both ends of a unit base 13.
The deformation roller 6E of this embodiment is rotatably attached to the roller attachment plate 14. The unit positioning mechanism 70 is attached to the unit base 13,
As will be described later, the unit 2 can be positioned by being combined with a floor stopper 80 provided on the floor frame 5. 5
C is a floating prevention frame for preventing the lifting of the unit base 13.

FIG. 2 is an assembly perspective view showing a member structure of the unit positioning mechanism 70 and the floor stopper 80, FIG. 3 is a side view thereof, and FIG. 4 is a sectional view taken along line YY of FIG. In the figure, the lever mounting frame 7B is screwed to the unit base 13, and the pin 7 is attached to the center of the lever mounting frame 7B.
0 is welded, and the pinhole spring 7C is inserted into the pin 70. One end of this pinhole spring 7C has a unit base 13
, And the other end is inserted into the unit interlock lever 7E to constantly elastically bias the unit interlock lever 7E downward. Further, the pin 7 of the lever mounting frame 7B is attached to one end of the unit interlock lever 7E.
0 is inserted and the split pin 7G prevents it from coming off. Further, a positioning lever 7D is attached to the tip of the unit interlock lever 7E, and the tip of the positioning lever 7D projects toward the front of the unit and is operated by an operator. On the other hand, a shake prevention interlock lever 7F that is long in the unit board width direction is attached to the lower end of the unit interlock lever 7E. Positioning holes 80A (for unit insertion positioning) opened in the stopper base 80,
It has a configuration that can be inserted into B (for positioning the unit withdrawal). A part of the shake prevention interlock lever 7F is held by a holding bracket 13A of the unit base (see FIG. 1).

FIG. 5 is a front view showing the mounting state of the deforming roller 6E of this embodiment, and the outer diameter dimension D of the deforming roller 6E.
No. 1 is at least twice the roller groove diameter d (1.7 times or less in the prior art). The deforming roller 6E is provided with the roller mounting bolt 6
A, washer 6B, nut 6C, roller mounting plate 14
Is rotatably assembled, is installed at the end of the unit base 13, and is arranged on a guide rail 5A obtained by bending the floor frame 5 into a U-shape.

Next, the operation of this embodiment will be described.
The operator lifts the positioning lever 7D to disengage the unit positioning mechanism 70 from the floor stopper 80, and grips the grip handle 4 of the unit 2 to roll the roller 6 of the unit 2 along the guide rail 5A. Then, the unit 2 is pulled out or inserted. However,
When the circuit breaker 2A is in operation, the unit interlock rod 2B, which is a member of the circuit breaker 2A, is held in the vertical state and abuts on the unit interlock lever 7E.
Even if an operator tries to move the unit 2 by lifting the positioning lever 7D, it cannot be moved.

According to this embodiment, the shake preventing interlock lever 7F for positioning the unit and the floor stopper 80 are formed wide in the width direction of the unit board, respectively, and the lower end portion 70 of the shake preventing interlock lever 7F is moved during the movement of the unit.
Since 0 contacts the floor stopper 80 at two points in the wide direction, the impact can be balanced and the lateral shake of the unit base 13 can be prevented. Further, even if the lower end portion 700 of the shake prevention interlock lever 7F comes into contact with the positioning holes 80A and 80B of the floor stopper 80, the impact force is dispersed to two points, so the vertical shake of the unit base 13 is minimized. Can be suppressed. That is, since the horizontal shake or the vertical shake of the unit base 13 is reduced, the roller 6 does not come off from the guide rail 5A bent in a U shape. When the contact position between the shake prevention interlock lever 7F and the floor stopper 80 is as far away as possible in the unit board width direction, it is easy to disperse the shock of lateral shake or vertical shake, and the contact position is The effect is improved by arranging them symmetrically with respect to the center of the unit width. Furthermore, the number of contact points may be two or more.

Further, since the outer diameter dimension D1 of the deforming roller 6E is formed to be more than twice the roller groove diameter d, the unit base 13
Even if the horizontal shake or vertical shake occurs, it does not come off from the guide rail 5A. In this case, it is necessary to dispose a pair of deformation rollers 6E at both ends of the unit base 13 as shown in FIG. 6 (a).

In FIG. 6 (b), a pair of deforming rollers 6F having an inner diameter D2 which is more than twice the roller groove diameter d are arranged at both ends of the unit base. The inner diameter of the roller 6F is the guide rail 5
It regulates the movement of A and makes it hard to come off. Further, as shown in FIG. 6 (c), if a roller 6G having both the inner diameter dimension D2 and the outer diameter dimension D1 is twice or more the roller groove diameter d is installed, the effect is further enhanced.

Example 2. In FIG. 7, the disengagement prevention frame 15 is provided at the portion where the floor frame 5 is bent in a U-shape. According to this embodiment, even if the unit 2 swings laterally, the roller mounting bolt 6A comes into contact with the detachment prevention frame 15 and the detachment of the roller 6 can be prevented.

Example 3. In FIG. 8, a detachment prevention frame 15 is provided at a location where the floor frame 5 is bent in a U-shape, and a rubber stopper 6D is further provided on the head of the bolt for attaching the roller 6. According to this embodiment, when the lateral shake of the unit 2 occurs, the rubber stopper 6D prevents the detachment prevention frame 15 from coming off.
Since the roller 6 is elastically contacted with the roller 6, the roller 6 can be prevented from coming off, and the impact force when the roller 6 comes into contact with the removal preventing frame 15 can be mitigated.

[0027]

As described above, according to the present invention, since the interlock lever and the stopper of the unit positioning mechanism are in contact with each other at two or more positions in the width direction of the unit panel, the impact can be balanced and the unit lateral Runout can be prevented. Moreover, since the impact force of the contact between the interlock lever and the floor stopper is distributed to two points, vertical swing of the unit can be suppressed to the minimum. Therefore, there is an effect that the roller does not come off the guide rail.

Further, since the outer diameter dimensions, the inner diameter dimensions, or the outer diameter dimension and the inner diameter dimension of the pair of rollers are made twice or more larger than the groove diameters of the rollers, the unit base is shaken laterally or vertically. However, it does not come off from the guide rail.

Further, by providing a prevention frame,
It is possible to prevent the rollers from coming off.

Further, by providing the rubber stopper 6, it is possible to prevent the roller from coming off and to alleviate the impact force when the roller comes into contact with the prevention frame.

[Brief description of drawings]

FIG. 1 is a front view of a unit structure according to a first embodiment of the present invention.

FIG. 2 is an assembly perspective view showing a configuration of a unit positioning mechanism and a floor stopper according to the first embodiment.

FIG. 3 is a side view of the unit positioning mechanism and the floor stopper according to the first embodiment.

FIG. 4 is a sectional view taken along line YY of FIG.

FIG. 5 is a front view showing a mounting state of a deforming roller according to the first exemplary embodiment.

FIG. 6 is a front view showing how various rollers are attached.

FIG. 7 is a front view showing a mounted state of a roller of the second embodiment.

FIG. 8 is a front view showing a mounted state of a roller according to a third embodiment.

FIG. 9 is an overall perspective view showing an electric control panel that houses a plurality of units.

FIG. 10 is a plan view of a conventional unit seen from above.

11 is a side sectional view of FIG.

FIG. 12 is a front view of a conventional unit.

FIG. 13 is a front view of a conventional roller mounting portion.

FIG. 14 is an assembled perspective view showing a conventional roller mounting portion.

FIG. 15 is an assembled perspective view showing a conventional unit positioning mechanism and a floor stopper.

FIG. 16 is a side view of a conventional unit positioning mechanism and floor stopper.

17 is a sectional view taken along line XX of FIG.

FIG. 18 is a side view of a conventional unit positioning mechanism and floor stopper.

[Explanation of symbols]

 2 Unit 2A Circuit Breaker 2B Unit Interlock Rod 4 Grip Handle 5 Floor Frame 5A Guide Rail 5C Lifting Prevention Frame 6 Roller 6D Rubber Stopper Bolt 6E Deformation Roller 6F Deformation Roller 6G Roller 70 Unit Positioning Mechanism 7A Unit Interlock Lever 7B Lever Mounting frame 7C Hineri spring 7D Positioning lever 7E Unit interlock lever 7F Shake prevention interlock lever 7G Split pin 80 Floor stopper 80A, B Positioning hole 13 Unit stand 13A Lever holding bracket 14 Roller mounting plate 15 Removal prevention frame

Claims (4)

[Claims] 1. A unit withdrawal structure in which a roller is attached to a unit base on which an electric device is mounted and is rolled on a guide rail of an electric control panel so that the unit base is inserted into or withdrawn from the electric control panel. In, a positioning mechanism for positioning the unit is installed on the unit base, and a stopper for engaging or contacting the interlock lever of the positioning mechanism is provided on the floor frame of the electric control panel.
A unit drawing structure for an electric control panel, wherein engagement or contact between the interlock lever and the stopper is performed at least at two or more positions in the unit width direction. 2. A unit in which a pair of rollers are attached to a unit base on which electric equipment is mounted, and the unit base is inserted into or pulled out from the electric control panel by rolling on a guide rail of the electric control panel. In the drawer structure,
A unit drawing structure for an electric control panel, wherein the outer diameters of the pair of rollers, the inner diameters of the pair of rollers, or the outer diameter and the inner diameter of the pair of rollers are twice or more larger than the groove diameter of the rollers. 3. A unit in which a pair of rollers are attached to a unit base on which electric equipment is mounted, and the unit base is inserted into or pulled out from the electric control panel by rolling on a guide rail of the electric control panel. In the drawer structure,
A unit withdrawal structure for an electric control panel, characterized in that a prevention frame for preventing roller disengagement is provided outside the pair of rollers. 4. The unit drawing structure for an electric control panel according to claim 3, wherein an elastic member corresponding to the prevention frame is attached to the outside of the roller.