JPH0582991A - Control unit pulling-out structure - Google Patents

Abstract

PURPOSE:To obtain a safe control unit pulling-out structure which can maintain a control unit on guide rails while the unit is pulled out and on which adjusting work can be easily performed. CONSTITUTION:When a control unit 1 is pulled out along guide rails 3 after removing a fixing screw, a stopper screw 6 collides with a front wall D. When the hand is removed from the control unit 1, the unit 1 tilts by its own weight around the front end corner of a vertical wall 3B, but the unit 1 is maintained in a slightly titled state, because an engagement projection 2E collides with an upper horizontal wall 3a. Therefore, a variable resistor, etc., mounted in the control unit 1 can be safely and easily adjusted or inspected without any obstruction from adjacent electronic equipment, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control panel for accommodating a large number of electronic devices, and more particularly to a structure for removably mounting a control unit in which the electronic devices are mounted in the control panel.

[0002]

2. Description of the Related Art FIG. 14 is a conventional example of Japanese Unexamined Patent Publication No. 2-230.
FIG. 15 is a perspective view of the same as that shown in 800, and FIG. 15 is a cross-sectional view of essential parts showing engagement of the rails in FIG. 9. In the figure, on the left and right sides of the bottom of the control unit 32 housed in the control panel, there are three walls 33a, 33b and 3 which are perpendicular to each other.
A first rail 33 having a U-shaped cross section made of 3c is fixed by screws or the like along the depth direction.
The first rails 33 are mounted so that the open surfaces of the U-shaped cross section face each other. The front end of the vertical wall 33a extending in the longitudinal direction is bent at a right angle to form a front wall 33d. The front wall 33d is provided with a pair of upper and lower holes 36.

On the other hand, on the left and right sides of the shelf board 35, the first
At a position corresponding to the rail 33, a second rail 34 having a U-shaped cross section composed of three walls 34a, 34b, and 34c forming a right angle with each other is fixed by screws or the like along the depth direction. The second rail 34 is installed with its horizontal wall 34b in contact with the shelf plate 35. The vertical wall 3 located inside the second rail 34
The front and rear end portions of 4c are folded at right angles so as to close the front and rear ends of the U-shaped cross section to form front and rear walls 34d and 34e, and screw holes 37 are screwed into these.

When housing the control unit 32, the rear end of the first rail 33 of the control unit 32 is inserted into the gaps x and y of the second rail 34 shown in FIG. The front wall 33d of the rail 33 is pushed in until it contacts the front wall 34d of the second rail 34. Then, it is fastened and fixed by a screw 38 which passes through the hole 36 and is screwed into the screw hole 37. In this state, the rear end of the first rail 33 protrudes rearward from the rear wall 34e of the second rail 34, and the control unit 32 is restricted from moving back and forth, left and right, and up and down.

[0005]

The control unit 32 described above is to be solved.
When taking out for maintenance and inspection, first, the external wiring (not shown) connected to it can be removed, then the screw 38 can be loosened and removed, and it can be pulled out along the second rail. By the way, when adjusting a variable resistor or the like mounted inside the control unit 32, it is often desired to perform the above-mentioned adjustment work in a state where the external wiring is connected and partially pulled out. However, since the rear end of the first rail 33 of the control unit 32 is disengaged from the rear wall 34e of the second rail 34 during the withdrawal of the conventional device, the center of gravity of the control unit 32 is higher than the front end of the second rail 34. When it comes out, it falls forward and falls off. Moreover, if the force is applied carelessly during adjustment work even at a position deeper than that, there is a danger of falling off.
Further, when the printed circuit board is provided in the depth direction of the control unit, the mounting surface of the printed circuit board is difficult to visually check even in the pulled-out state, and inspection and adjustment work is more difficult.

The present invention has been made in order to solve the above problems, and a control unit having a printed circuit board in the depth direction can be held on a guide rail while being pulled out, so that it can be safely and easily inspected. The purpose is to obtain a pull-out structure of a control unit that enables adjustment work.

[0007]

According to a first aspect of the present invention, there is provided a control unit drawer structure in which a pair of left and right guide rails having a U-shaped or Z-shaped cross section are provided in a depth direction on a lateral member in a control panel. The front ends of the upper horizontal walls of each of the guide rails are partially cut out, and the front ends of the vertical walls or the lower horizontal walls are bent at right angles to form front walls in which screw holes are screwed. The bottom plate of the case of the control unit that is slid over the pair of left and right guide rails has left and right side walls, a front wall, and a rear wall that are bent downward,
Engagement protrusions that extend inside the upper water surface wall of the guide rail are formed on the left and right of the rear wall of the bottom plate, and mounting holes are formed on the front wall at positions corresponding to the screw holes of the front wall of the guide rail. In the unit case, the engaging projections on the rear wall of the bottom plate are inserted into the inside of the upper horizontal wall of the guide rail through the notches at the tips of the upper horizontal walls, and the inner surfaces of the left and right side walls of the bottom plate are guided by the vertical walls of the guide rail. The bottom plate front wall is pushed into contact with the guide rail front wall and is fixed by a screw member.

In another structure of the control unit according to the second aspect of the present invention, a pair of upper and lower guide rails having a U-shaped cross section are arranged in the depth direction inside the upper and lower lateral members in the control panel. The front end of the horizontal wall of the guide rail is bent at a right angle to form a front wall with screw holes, while the control unit case that slides along the guide rail is located on the outer periphery of the guide rail. Unit rails having a U-shaped cross section are provided at the top and bottom, mounting holes are formed in the front wall of the case at positions corresponding to the screw holes in the front wall of the rail, and notches for receiving the guide rails are provided on the rear surface of the case. A portion is formed and is inserted between the upper and lower guide rails through the notch, and the inner surfaces of both side wall surfaces of the unit rail are guided and pushed into the both side wall surfaces of the guide rail. Front wall is in contact with the guide rail front wall is obtained so as to screwed member.

The control unit withdrawing structure according to a third aspect of the present invention is, in the first and second aspects of the present invention, a lower surface of the case bottom plate horizontal wall located below the guide rail front wall or a lower surface of the lower unit rail horizontal wall. It is provided with a stopper projection.

According to a fourth aspect of the present invention, there is provided a control unit drawer structure, in which a substantially rectangular frame body is provided on an upper surface of a bottom plate which is arranged so as to be able to be drawn out in a control panel, and a side surface in a depth direction of the substantially rectangular frame body. A printed circuit board or the like is attached, and horizontal legs are formed at the front and rear ends of the substantially rectangular frame body, respectively, and the front horizontal leg is detachably screwed to the bottom plate, and the rear horizontal leg is the bottom plate. It is fixed to the bottom plate with a pair of left and right spacer parts fitted in the left and right holes of the left and right holes, and at least one of the left and right holes is formed as an arcuate slot, and the substantially rectangular frame is pulled out together with the bottom plate. In this configuration, one fixed portion of the horizontal leg at the rear end is used as a fulcrum, and the fixed portion on the opposite side is guided along the arcuate slot so that it can rotate on the upper surface of the bottom plate.

According to a fifth aspect of the present invention, there is provided a control unit drawer structure, in which a substantially rectangular frame body is provided on an upper surface of a bottom plate which is arranged so as to be able to be drawn out in a control panel, and a side surface in a depth direction of the substantially rectangular frame body. A printed circuit board or the like is attached to the above, and horizontal legs are formed at the front and rear ends of the substantially rectangular frame body, respectively, and the horizontal leg at the front end is detachably fixed to the bottom plate by screws, and the center of the horizontal leg at the rear end is formed. The parts are fixed by sandwiching the spacer part fitted in the hole of the bottom plate, and the insertion protrusions formed on the left and right of the horizontal leg at the rear end are fitted in the positioning holes formed in the vertical part on the upper surface of the bottom surface. The hole of the bottom plate is formed in a linear slot that extends forward, the substantially rectangular frame body is pulled out together with the bottom plate, and the fixed portion of the horizontal leg at the rear end is the linear slot. By being guided along the You can slide it forward slide, in which further to be able to rotate the bottom plate upper surface fixing portion of the horizontal leg of the rear end as a fulcrum.

[0012]

According to the present invention, in the case of the control unit, the engaging projection of the rear wall of the bottom plate is inserted into the inside of the upper horizontal wall of the guide rail from the notch at the tip of the upper horizontal wall.
The inner surfaces of the left and right side walls of the bottom plate are guided and pushed into the vertical wall of the guide rail, the front wall of the bottom plate is brought into contact with the front wall of the guide rail and fixed with a screw member, and the engaging projections of the rear wall of the bottom plate are engaged during the withdrawal. The control unit is prevented from coming off by contacting the upper horizontal wall of the control unit. In addition, the control unit, in which the unit rails are arranged above and below the case, receives the upper and lower guide rails and is inserted into the notch in the rear surface wall, and the inner surfaces of both side wall surfaces of the unit rail are guided and pushed into both side wall surfaces of the guide rail. Then, the front wall of the case is brought into contact with the front wall of the guide rail and fixed by a screw member, and the rear end of the upper unit rail comes into contact with the upper guide rail during withdrawal to prevent the control unit from falling off.
Further, the stopper projection comes into contact with the front wall of the guide rail, so that the pulling-out of the control unit is stopped.

Further, according to the present invention, the substantially rectangular frame body provided on the upper surface of the bottom plate of the drawer type control unit and provided with the printed circuit board on the side surface in the depth direction has the front end screwed and fixed, and the rear end left and right. Can be rotated about any of the fixed portions as a fulcrum, and the rotation angle is restricted by the arcuate slot of the bottom plate through which the fixed portion on the opposite side is guided. Further, a substantially rectangular frame body having a rear end fixing portion that fits linearly in the front-rear direction in the groove hole is pulled out forward by using the groove hole as a guide by removing the screw fixing at the front end. It is rotated at an arbitrary angle with the end as a fulcrum.

[0014]

EXAMPLES Example 1. 1 is a plan view of a first embodiment of a control unit drawer structure according to the present invention, and FIG. 2 is a front view of the same. In the figure, 1 is a control unit, and 2 is a bottom plate which constitutes a part of the case of the control unit 1. Reference numeral 3 is a symmetrical guide rail, which is fixed to the upper surface of the fence plate 4 arranged in the control panel along the depth direction by screwing or welding. The guide rail 3 is the upper horizontal wall 3
A vertical wall 3B, and a lower horizontal wall 3C wider than the upper horizontal wall 3A have a substantially U-shaped cross section.
The front end of C is bent at a right angle to form a front wall 3D. Further, a part of the front of the upper horizontal wall 3A is cut off to form a cutout portion 3E. The left and right guide rails 3 are attached so that the respective upper horizontal walls 3A, 3A face inward. Further, the guide rails 3 are formed by bending the respective lower horizontal walls 3C to the opposite side to the direction shown in FIG.
It may be configured to have a V-shaped cross section. In this case, the front wall 3D is formed by bending the front end of the vertical wall 3B.

The bottom plate 2 has a horizontal wall 2A which serves as the bottom surface of the control unit 1. The entire left and right ends of the horizontal wall 2A are bent downward, and side walls 2B and 2B are formed so as to straddle the guide rails 3 and 3. The entire front end of the horizontal wall 2A is also bent downward to form a front wall 2C. Moreover, the rear end of the horizontal wall 2A is also bent downward,
D is formed. The rear wall 2D is located between the upper horizontal walls 3A of the left and right guide rails, and has engagement protrusions 2E extending inward from the upper horizontal wall 3A and the vertical wall 3B of each guide rail 3 at both ends thereof. At the final device position of the control unit 1, the front wall 2C is screwed and fixed to the front wall 3D of the guide rail via the fixing screw 5. Further, only a slidable gap is provided between the engagement protrusion 2E and the upper horizontal wall 3A and the vertical wall 3B, so that the rear part of the control unit 1 is restricted from moving vertically and horizontally. Reference numeral 6 denotes stopper screws screwed rearward on both sides of the bottom plate horizontal wall 2A, and each stopper screw 6 is located above the lower horizontal wall 3C of each guide rail 3.

Next, the operation of the first embodiment will be described with reference to FIGS. 3 is a cross-sectional view corresponding to the line AA of FIG. 1 during the drawing, and FIG. 4 is a cross-sectional view corresponding to FIG.

When the fixing screw 5 is removed and the control unit 1 is pulled out along the guide rail 3, as shown in FIG.
The stopper screw 6 hits the front wall 3D. Then, when the hand is released, the control unit 1 tilts forward by its own weight with the corner of the tip of the vertical wall 3B as a fulcrum, but the engaging projection 2E contacts the upper horizontal wall 3A and is held in a slightly tilted state. Since the stopper screw 6 is provided on the rear side, most of the control unit 1 is stably held at a position projecting forward from the guide rail 3. Therefore, adjustment and inspection of the variable resistor and the like mounted inside the control unit 1 can be easily performed without being disturbed by other adjacent electric devices. Further, by arranging the external wiring (not shown) for a long time, it is possible to perform the adjustment and inspection work while the external wiring is still connected. In this way, the electric components inside the control unit 1 can be adjusted and inspected safely without taking out the control unit 1 from the guide rail 3 and without risk of falling off even if the center of gravity of the control unit 1 deviates from the guide rail 3. Therefore, the efficiency of the shipping test can be greatly improved.

To remove the control unit 1 from the guide rail 3, the front of the control unit 1 is lifted at the position where the stopper screw 6 hits the front wall 3 as shown in FIG. When the locked state is released and further pulled out, the engagement protrusion 2E contacts the front wall 3D. At this position, the engaging protrusion 2 that has been located inside the upper horizontal wall 3A until now.
Since E is located in the cutout portion 3E, if the rear of the control unit 1 is lifted, the control unit 1 will move to the guide rail 3
Can be removed from. When the control unit 1 is mounted on the guide rail 3, the procedure described above may be reversed. In the attaching / detaching operation of the control unit, the pulling operation and the lifting operation of the control unit at the midway position of the pulling out operation of FIG. 3 (putting a hand on the lower surface of the control unit to support its weight)
Since the and can be replaced with each other, it is possible to safely attach and detach the control unit having a particularly heavy weight.

Example 2. Although the first embodiment is applied to a control unit having a relatively large width and a low height, an embodiment suitable for a control unit having a small width and a high height is shown in FIGS. Will be described. FIG. 5 is a side view of a second embodiment of the control unit drawer structure according to the present invention, FIG. 6 is a front view of the same, and FIG.
FIG. 8 is a side view when the same is attached and detached. In the figure, 11 is a control unit, 12 is a case of the control unit 11,
It has a front wall 12A, a side wall 12B, and a rear wall 12C. Usually, although not shown, a connector for external wiring is attached to the front wall 12A, and a printed circuit board or the like is attached inside the side wall 12B. .. Reference numeral 13 denotes unit rails arranged above and below the case 12. The unit rail 13 has a U-shaped cross section having a horizontal wall 13A and left and right side walls 13B. The unit rails 13 are arranged so that the horizontal walls 13A face inward, and the front and rear sides are a case front wall 12A and a rear wall 12, respectively.
It is welded to B. Notches 12D are provided above and below the rear wall 12C so as to correspond to the cross section of the unit rail 13. Reference numerals 14 and 15 denote upper and lower guide rails, which are fixed to the front and rear lateral frames 16 and 17 by screwing or the like. The upper guide rail 14 is configured to have a U-shaped cross section that can be fitted inside the unit rail 13, and has a horizontal wall 14A and left and right side walls 14B. The front end of the horizontal wall 14A is bent to form a front wall 14C lower than the height of the side wall 14B, and the notch 14 is formed in front of the side wall 14B so as to match the height of the front wall 14C.
D is provided. Similarly, the lower guide rail 15 is also formed into a U-shaped cross section having a horizontal wall 15A and left and right side walls 15B. The tip of the horizontal wall 15A is bent to form a front wall 15C having the same height as the side wall 15B. Has been formed. At the final device position of the control unit 11 shown in FIG.
The front wall 12A of the case is screwed and fixed to the front walls 14C and 15C of the upper and lower guide rails with a fixing screw 18,
The unit rail 13 and the guide rail 1 are behind the case 11.
The up and down and left and right movements are regulated by fitting with Nos. 4 and 15.

The horizontal wall 13A of the lower unit rail 13
Since a stopper screw 19 is screwed to the rear of the control screw 11, the stopper screw 19 is stopped by hitting the front wall 15C of the lower guide rail by removing the fixing screw 18 and pulling out the control unit 11. Then, the control unit 11 leans forward due to its own weight, and the upper unit rail 13 and the upper guide rail 14 hit and are held in the pulling-out intermediate position shown in FIG. The electric components attached to the side wall 12B of the case can be adjusted and inspected at this midway position.

The control unit 11 is connected to the guide rails 14 and 1
To remove from 5, the large gap of the cutout 14D portion can be used, and the front of the control unit 11 can be lifted to release the stopper screw 19 and the front wall 15C from the locked state and to be further pulled out. When the control unit 11 is mounted on the guide rails 14 and 15, the above operation may be performed in reverse.

Although the screw member 19 is used as the stopper projection for stopping the control unit in the middle of pulling out in both the first and second embodiments, metal fittings having a predetermined projection height may be welded. Further, the bottom plate 2 or the unit rail 13 may be subjected to burring to form a protrusion having a predetermined height. Further, when it is not necessary to make adjustments and inspections inside the control unit on the guide rails, the stopper projections may not be provided. Further, in the first embodiment, the engaging projection 2E extending inside the guide rail 3 is the case bottom plate 2
However, it may be formed integrally with a back plate disposed on the bottom plate 2.

Example 3. 9 is a plan view of a third embodiment of a control unit drawing structure according to the present invention, and FIG. 2 is a sectional view taken along line BB of FIG. In the figure, 1 to 6 are the same as or equivalent to those in FIGS. 1 and 2, so that only a necessary portion will be supplementarily described. Reference numeral 41 denotes a front plate disposed in front of the bottom plate 2, which includes a horizontal leg 41A fixed to the bottom plate horizontal wall 2A via a screw member 5, a handle 41C whose front and rear ends are bent, and a vertical leg 41B. Reference numeral 42 denotes a rear plate disposed behind the bottom plate 2 and includes a horizontal wall 42A and a vertical wall 42A.
It consists of B. Stepped nuts 43, 43 are fixed to the left and right rear surfaces of the horizontal leg 42A via screw members 7. The stepped nut 43 has a spacer portion 43A slightly higher than the plate thickness of the bottom plate 2, and is fitted in arcuate slot holes 2F, 2F formed in the bottom plate 2. by this,
The rear plate 42 is held so as to be rotatable and slidable with respect to the bottom plate 2. Reference numeral 44 denotes a pair of left and right side plates arranged in the depth direction, which are flanges 44A, 44 formed at the front and rear ends, respectively.
It is fixed to both sides of the vertical legs 41B, 42B of the front and rear face plates by using A. Further, flanges 44B and 44B for reinforcement are formed at the upper and lower ends of the side plate 44. As described above, the front and rear face plates 41, 42 and the left and right side face plates 44,
Reference numeral 44 constitutes a substantially rectangular frame body 40, and is arranged on the horizontal wall 2A surface of the bottom plate 2. 45 and 46 are side plates 4 respectively
4 is a printed circuit board attached to the electrodes 44 and 44 via an insulating spacer 48. Reference numeral 47 is an additional printed circuit board attached to the front side flanges 44A, 44A of the left and right side plates. Further, 49 is a plurality of DC power supplies, which are arranged inside the substantially rectangular frame 40 and attached to the opposite side of the printed circuit board 45. Similarly, necessary electric components can be attached to the printed boards 45, 46, 47 inside the substantially rectangular frame body 40, and the control unit 1 that is integrated in an electric circuit can be configured.

Next, the operation of the third embodiment will be described with reference to FIG. FIG. 11 is a partial plan view corresponding to FIG. 9 in a pulled-out state. In the figure, the bottom plate 2 is pulled out as described in the first embodiment and is held at the tip of the guide rail 3. In this state, the printed circuit boards 45 and 46 can be approached without being disturbed by other adjacent electric devices, but the printed circuit boards 45 and 46 having a large depth dimension and the electronic components to be adjusted and inspected are located in the back. The above work is not easy when it is located in the direction.
In such a case, remove the fixing screw 5 of the front plate 41,
Using the handle 41C, the substantially rectangular frame body 40 to which the printed circuit board and the like are attached is horizontally rotated. Since the arcuate slots 2F, 2F are bored symmetrically around the position of the step nut 43 in the completely assembled state of the control unit 1, the substantially rectangular frame body 40 has step nuts on opposite sides. It can be rotated either left or right with 43 as a fulcrum.
The maximum turning angle is the slot 2 as shown by θ in FIG.
It is regulated by the arc length of F, and the arc length can be designed with flexibility. The printed circuit board 4 is rotated by the above-described rotation operation.
Improved visibility and accessibility to the mounting surface of 5, 46,
Adjustment, inspection and connection work of external wiring (not shown) will be facilitated.

The operation of removing the control unit 1 shown in FIGS. 9 and 10 from the guide rail 3 or mounting it on the guide rail 3 is carried out with the substantially rectangular frame body 40 to which the printed circuit board and the like are attached fixed. It can be performed in exactly the same way as described in.

Example 4. 12 is a plan view of a fourth embodiment of a control unit drawer structure according to the present invention, and FIG. 13 is a partial plan view of the drawer structure. In the figure, 2G is a linear slot, which is formed in the depth direction behind the bottom plate horizontal wall 2A. Reference numeral 8 denotes a support plate fixed to the bottom plate rear wall 2D, which projects vertically above the bottom plate horizontal wall 2A, and positioning holes 8A, 8A are formed on the left and right of that portion. Reference numeral 52 denotes a rear surface plate disposed behind the bottom plate 2 and has a horizontal wall 52A and a vertical wall 52B. The rear plate 52 is a substantially rectangular body 4 together with the front plate 41 and the left and right side plates 44, 44.
Configures 0. A stepped nut 43 is fixed to the central portion of the horizontal leg 52A via a screw member 7. The stepped nut 43 has a spacer portion 43A slightly higher than the plate thickness of the bottom plate 2, and is fitted in the linear slot 2G. As a result, the rear plate 52 is held so as to be rotatable and slidable with respect to the bottom plate 2. In addition, insertion projections 52C, 52C are provided on the left and right ends of the horizontal leg 52A of the rear plate.
Is bent, and is fitted into the positioning hole 8A of the support plate 8 in a completely assembled state. As a result, a resistance force is applied to the lateral shake of the substantially rectangular body 40 due to vibration during transportation. Other than the above, it is the same as that of the third embodiment, and therefore its explanation is omitted.

In FIG. 12, the control unit 1 of the fourth embodiment removes the fixing screw 5 of the bottom plate front wall 2C, is pulled out as described in the first embodiment, and is held at the tip of the guide rail 3. In this state, it is not disturbed by other electric equipment adjacent thereto, but when the control unit 1 is housed in the inner part of the control panel housing, the side wall (not shown) of the housing is disturbed. Therefore, it is not easy to access the printed circuit boards 45 and 46. Further, when the printed circuit boards 45 and 46 have a large depth dimension or the electronic parts to be adjusted and inspected are arranged at the back side, the above work becomes more difficult. In such a case, the fixing screw 5 of the front plate 41 is removed, and the handle 41C is used to form the substantially rectangular frame 40.
If you pull out only the front, the stepped nut 43 will be
It stops at the front end of the. Further, the front end of the slot 2G is pivoted in the required direction, either left or right. By the above-mentioned pulling-out and rotating operations, the visibility and accessibility to the mounting surfaces of the printed circuit boards 45 and 46 are greatly improved, and adjustment, inspection and connection work of external wiring (not shown) can be facilitated. The maximum drawing dimension of only the substantially rectangular frame 40 is shown by L in FIG. 13, and its length can be designed with flexibility, and the same effect as a general extension rail can be obtained. In addition, the guide rail 3 of the control unit 1 of the fourth embodiment
The attachment / detachment work to / from the same may be performed as in the third embodiment.

Example 5. 4 in the above Examples 3 and 4.
Although the individual members are combined to form the substantially rectangular frame body 40,
It can be configured with only the left and right side plates, and when only one printed circuit board is arranged in the depth direction, one side plate is formed in a substantially U shape to form a substantially rectangular frame body. You can make changes. Further, the stepped nut 43 in Embodiments 3 and 4 can be changed to a stepped bolt screwed to the horizontal leg 42A, and the spacer portion 43A can be changed to an independent washer. Further, in the third embodiment, the arcuate slot 2F of the horizontal wall 2A of the bottom plate is provided symmetrically, but when the required turning direction is only one side, it may be provided only on either side.

[0029]

As described above, according to the present invention, the control unit case that is inserted and removed along the guide rail is provided with the means for stopping and holding it while pulling it out by engaging with the guide rail. The inside of the unit can be easily adjusted and inspected during withdrawal, and the efficiency of shipping test and installation adjustment can be improved. Further, according to the present invention, since the stopper projection is provided, the stop holding during the pulling out of the control unit becomes more reliable.

Further, according to the present invention, only the portion of the control unit that is inserted and removed along the guide rail, to which the printed circuit board is attached, can be rotated to the left and right, and further, only the above-mentioned portion can be pulled out and rotated. Therefore, adjustment, inspection, and external wiring connection work can be easily performed.

[Brief description of drawings]

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

FIG. 2 is a front view of the first embodiment of the control unit drawer structure according to the present invention.

FIG. 3 is a cross-sectional view corresponding to the line AA in FIG. 1 during drawing.

FIG. 4 is a sectional view corresponding to FIG. 3 at the time of attachment / detachment.

FIG. 5 is a side view of a second embodiment of a control unit drawer structure according to the present invention.

FIG. 6 is a front view of Embodiment 2 of the control unit drawer structure according to the present invention.

FIG. 7 is a side view corresponding to FIG. 5, which is being pulled out.

FIG. 8 is a side view corresponding to FIG. 5 at the time of attachment / detachment.

FIG. 9 is a plan view of a third embodiment of a control unit drawer structure according to the present invention.

10 is a cross-sectional view taken along the line BB of FIG.

11 is a partial plan view corresponding to FIG. 9 in a pulled-out state.

FIG. 12 is a plan view of a fourth embodiment of a control unit drawer structure according to the present invention.

FIG. 13 is a partial plan view corresponding to FIG. 12 in a pulled-out state.

FIG. 14 is a perspective view of a conventional control unit drawer structure.

FIG. 15 is a sectional view of a portion showing engagement of the rail of FIG.

[Explanation of symbols]

 1 Control Unit 2 Bottom Plate 2C Front Wall 2D Rear Wall 2E Engagement Protrusion 3 Guide Rail 3A Upper Horizontal Wall 3D Front Wall 3E Notch 5 Fixing Screw 6 Stopper Screw 11 Control Unit 12 Case 13 Unit Rail 14 Guide Rail 14D Notch 15 guide rail 15C front wall 2F arcuate groove 2G straight groove 8 support plate 8A positioning hole 40 substantially rectangular body 41 front plate 42 rear plate 43 stepped nut 44 side plate 45 printed circuit board 46 printed circuit board 52 rear surface plate

Claims (5)

[Claims] 1. A pair of left and right guide rails having a U-shaped or Z-shaped cross section are arranged in a depth direction on a lateral member in a control panel, and a tip of an upper horizontal wall of each of the guide rails is partially formed. The notch, the front end of the vertical wall or the lower horizontal wall is bent at a right angle to form a front wall in which screw holes are screwed, while
The bottom plate of the case of the control unit, which is slid across the pair of left and right guide rails, has left and right side walls, a front wall, and a rear wall, which are respectively bent downward. An engaging protrusion extending inward of the upper water surface wall is formed, a mounting hole is formed in the front wall at a position corresponding to a screw hole of the front wall of the guide rail, and the case of the control unit is an engaging protrusion of the rear wall of the bottom plate. Is inserted into the inside of the upper horizontal wall from the notch at the tip of the upper horizontal wall of the guide rail, and the inner surfaces of the left and right side walls of the bottom plate are guided and pushed by the vertical walls of the guide rail, and the front wall of the bottom plate is the front wall of the guide rail. A pull-out structure for a control unit, wherein the pull-out structure is abutted on the base plate and fixed by a screw member. 2. A pair of upper and lower guide rails having a U-shaped cross section are arranged in the depth direction inside the upper and lower horizontal members in the control panel, and the front end of the horizontal wall of each of the guide rails is bent at a right angle. The control unit case, which is formed with a front wall having screw holes, is slidable along the guide rail. The control unit case is provided with unit rails having a U-shaped cross section located on the outer circumference of the guide rail. The front wall of the case is provided with mounting holes at positions corresponding to the screw holes of the front wall of the rail, and the rear surface of the case is formed with a cutout portion for receiving the guide rail, and the guides above and below the cutout portion are formed. While being inserted between the rails, the inner surfaces of both side wall surfaces of the unit rail are guided and pushed into the both side wall surfaces of the guide rail, the front wall of the case contacts the front wall of the guide rail, and is fixed by the screw member. The control unit drawer structure is characterized in that it is designed to be fixed. 3. The control unit drawer structure according to claim 1, wherein a stopper projection is formed on a rear lower surface of the bottom plate horizontal wall of the control unit case or the horizontal wall of the lower unit rail, and the control unit has a stopper projection. The stopper projection comes into contact with the front wall of the guide rail during withdrawal to stop the withdrawal of the control unit and the control unit is held in the guide rail, and the control unit is lifted to lift the stopper projection and the guide rail. A pull-out structure for a control unit, characterized in that it can be pulled out by releasing the locked state with the front wall. 4. A substantially rectangular frame body provided on an upper surface of a bottom plate which is arranged so as to be able to be pulled out in a control panel, and a printed circuit board or the like is attached to a side surface in the depth direction of the substantially rectangular frame body, and the substantially rectangular frame body. Horizontal legs are respectively formed at the front and rear ends of the frame body, the horizontal legs at the front end are detachably fixed to the bottom plate by screws, and the horizontal legs at the rear end are left and right fitted in the left and right holes of the bottom plate. It is fixed to the bottom plate by sandwiching a pair of spacer parts,
At least one of the left and right holes is formed in an arcuate slot, and the substantially rectangular frame body is pulled out together with the bottom plate,
By using one fixed part of the horizontal leg at the rear end as a fulcrum, and the fixed part on the opposite side is guided along the arcuate slot,
The control unit drawer structure is characterized in that the upper surface of the bottom plate can be rotated. 5. A substantially rectangular frame body provided on an upper surface of a bottom plate that is arranged so as to be able to be pulled out in a control panel, and a printed circuit board or the like is attached to a side surface of the substantially rectangular frame body in a depth direction, and the substantially rectangular frame body is provided. Horizontal legs are respectively formed at the front and rear ends of the frame body, the horizontal legs at the front end are detachably fixed to the bottom plate by screws, and the central portion of the horizontal legs at the rear end is a spacer fitted in the hole of the bottom plate. Insertion projections fixed on both sides of the part and formed on the left and right of the horizontal leg at the rear end are fitted and positioned in the positioning holes formed in the vertical portion of the top surface of the bottom plate, and the holes of the bottom plate are forward. It is formed in a linear slot extending to the bottom, the substantially rectangular frame body is pulled out together with the bottom plate, and the fixed portion of the horizontal leg at the rear end is guided along the linear slot, so that You can slide it on the upper surface of the bottom plate and pull it forward. A structure for pulling out a control unit, characterized in that it can be rotated on the upper surface of the bottom plate with a fixed portion of a horizontal leg as a fulcrum.