Disk structure

Abstract

To provide a board structure capable of reducing distances between a worker and various devices attached to a frame.SOLUTION: The board structure has a box-shaped cover and a frame on which various devices are provided. The cover opens and closes a first opening formed on a front side. The frame has a pair of pillars and a lower connecting portion. An area of the frame from the lower connecting portion to the front side is formed as an area where workers' feet are in contact with a floor surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] An embodiment of the present invention relates to a board structure. [Background technology]

[0002] For example, the panel structure for a free-standing distribution board or control board is manufactured and shipped as a box-shaped product consisting of a frame with four supports to which various devices can be attached, and a cover with a bottom panel, ceiling panel, side panels, and a door. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2005-150436 A [Patent Document 2] JP 2004-357348 A Summary of the Invention [Problem to be solved by the invention]

[0004] The problem that the present invention aims to solve is to provide a panel structure that can shorten the distance between a worker and various equipment attached to a frame. [Means for solving the problem]

[0005] According to an embodiment, the panel structure has a box-shaped cover and a frame that is stored inside the cover and in which various devices are arranged. The cover has a cover body that stands on a floor surface and a first door. The cover body has a ceiling board, a pair of side panels fixed to the ceiling board, and a first opening formed on the front side by the ceiling board and the pair of side panels. The first door is supported by the cover body and opens and closes the first opening. The frame has a pair of support columns and a lower connecting portion. The pair of support columns are spaced apart in the left-right direction when viewed from the front side of the cover and extend upward. The frame forms an area from the lower connecting portion toward the front side as an area where a worker's feet touch the floor surface. The frame extends in the depth direction from the front side to the rear side of the cover and has a pair of foot parts connected by a lower connecting part. The lower connecting part forms a substantially rectangular area in cooperation with the pair of foot parts at a position on the front side of the lower connecting part. [Brief description of the drawings]

[0006] [Figure 1] 1 is a schematic exploded perspective view of a panel structure for a switchgear / control panel according to a first embodiment; [Diagram 2] FIG. 1 is a perspective view of the panel structure for a switchgear and control panel according to the first embodiment, seen from the right side. [Diagram 3] FIG. 1 is a schematic perspective view of a panel structure for a switchboard / control panel according to a first modified example of the first embodiment. [Figure 4] FIG. 13 is a schematic perspective view showing a sliding structure between a base and a frame of a panel structure for a switchboard / control panel according to a second modified example of the first embodiment. [Diagram 5] FIG. 13 is a schematic right side view of a panel structure for a switchboard / control panel according to a third modified example of the first embodiment. [Figure 6] FIG. 13 is a schematic right side view of a panel structure for a switchboard / control panel, which is a further modified example of the third modified example of the first embodiment. [Figure 7] FIG. 13 is a schematic perspective view of a panel structure for a switchboard / control panel according to a fourth modified example of the first embodiment. [Figure 8] FIG. 13 is a schematic exploded perspective view of a panel structure for a switchboard / control panel according to a second embodiment. [Figure 9] FIG. 11 is a schematic right side view of a panel structure for a switchgear / control panel according to a second embodiment. [Figure 10] FIG. 13 is a schematic right side view of a panel structure for a switchboard / control panel according to a first modified example of the second embodiment. [Figure 11] FIG. 13 is a schematic right side view showing the lower right part of a panel structure for a switchgear / control panel according to a second modified example of the second embodiment. [Figure 12] FIG. 11 is a schematic exploded perspective view of a panel structure for a switchboard / control panel according to a third embodiment. [Figure 13] FIG. 13 is a schematic exploded perspective view of a panel structure for a switchboard / control panel according to a first modified example of the third embodiment. [Figure 14] FIG. 13 is a schematic partially exploded perspective view showing the lower part of a panel structure for a switchgear / control panel according to a second modified example of the third embodiment. [Figure 15]FIG. 13 is a schematic perspective view showing a lower part of a panel structure for a switchboard / control panel according to a third modified example of the third embodiment. [Figure 16] FIG. 13 is a schematic perspective view of a panel structure for a switchboard / control panel according to a fourth embodiment. [Figure 17] FIG. 13 is a schematic perspective view of a panel structure for a switchboard / control panel according to a first modified example of the fourth embodiment. [Figure 18] FIG. 13 is a schematic perspective view of a panel structure for a switchboard / control panel according to a fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] An embodiment of a panel structure 10 for a switchboard / control panel will be described with reference to the drawings. The panel structure 10 for a switchboard / control panel according to the embodiment preferably complies with, for example, the Japan Electrical Manufacturers' Association standard JEM 1459 "Structure and dimensions of switchboards / control panels."

[0008] [First embodiment] A panel structure 10 for a switchboard / control panel according to a first embodiment will be described with reference to Figs. 1 and 2.

[0009] Fig. 1 shows an exploded perspective view of the panel structure 10 as seen from above the front and right side. Fig. 2 shows a see-through view of the panel structure 10 as seen from the right side. Note that in Fig. 2, a door 34 of a cover 16, which will be described later, is omitted from the illustration.

[0010] As shown in Figures 1 and 2, an XYZ Cartesian coordinate system is taken for the panel structure 10. The positive direction of the X-axis is to the right when viewed from the front side of the panel structure 10. The positive direction of the Y-axis is from the front side to the back side of the panel structure 10. The positive direction of the Z-axis is from the lower side to the upper side of the panel structure 10. The direction along the X-axis may be referred to as the left-right direction, the direction along the Y-axis may be referred to as the depth direction, and the direction along the Z-axis may be referred to as the up-down direction.

[0011] 1, the panel structure 10 has a base 12, a mounting frame 14 on which various devices are arranged, and a box-shaped cover 16 that stands upright on a floor surface. The various devices include not only one or more devices attached to the mounting frame 14, but also wiring that connects the devices together, brackets that attach the devices to the mounting frame 14, and other members.

[0012] The exterior of the base 12 is formed in a substantially U-shape or a substantially C-shape. The base 12 has a pair of base plates 22a, 22b extending in the Y-axis direction, and a connector 24 extending in the X-axis direction and connecting the pair of base plates 22a, 22b. The base 12 is fastened to anchor bolts 26, for example, embedded in advance in the floor surface of the installation location of the panel structure 10.

[0013] In this embodiment, the mounting frame 14 is movable with respect to the base 12 and the cover 16 .

[0014] The cover 16 is formed, for example, in a substantially rectangular parallelepiped shape. The cover 16 has a cover body 32 and a door (first door) 34. The cover body 32 of the cover 16 houses the mounting frame 14 inside. The cover body 32 has a ceiling plate 42 parallel to the XY plane, a pair of side plates 44a, 44b fixed to the ceiling plate 42 and parallel to the YZ plane, and a back plate 46 parallel to the ZX plane. The cover body 32 does not have a front plate on the front side facing the back plate 46, and a first opening 52 is formed on the front side by the ceiling plate 42 and the pair of side plates 44a, 44b. The door 34 is supported by a hinge 36 at the edge of the first opening 52 of the cover body 32, and opens and closes the first opening 52 at the hinge 36 with the Z axis as a support shaft. The angle at which the door 34 opens can be set as appropriate, but in consideration of the ease of operation, it is preferable that the door 34 opens at least 90 degrees, and more preferably opens at 180 degrees or more. The cover 16 does not have a bottom plate that faces the ceiling plate 42. In other words, the cover 16 according to this embodiment is formed in a shape that covers the inside with the surfaces excluding the bottom plate and the first opening (door surface) 52.

[0015] The pair of side plates 44a, 44b are provided with a pair of protrusions (vibration prevention members) 64a, 64b that face each other and extend in the Y-axis direction. The pair of protrusions 64a, 64b are preferably provided at positions close to the upper end of the mounting frame 14 to be accommodated. One protrusion 64a protrudes in the +X direction from one side plate 44a toward the other side plate 44b, and the other protrusion 64b protrudes in the -X direction from the other side plate 44b toward one side plate 44a.

[0016] The base 12 and the mounting frame 14 have a slide structure 70 that slides the mounting frame 14 in the Y-axis direction relative to the base 12. As an example of the slide structure 70, the slide structure 70 has a pair of slide rails 72a, 72b.

[0017] The slide rails 72a, 72b have a base 82 that extends in the Y-axis direction and is fixed to the upper surfaces of the base plates 22a, 22b of the base 12, and a movable body 84 that moves expandably and contractibly in the Y-axis direction within a predetermined range relative to the base 82 and is fixed to the mounting frame 14. In other words, the slide rails 72a, 72b are fixed to the base 12 and also to the mounting frame 14.

[0018] The mounting frame 14 is stored inside the cover 16. The mounting frame 14 moves along the Y axis from the front side to the rear side and from the rear side to the front side relative to the cover 16. The mounting frame 14 has a support part 102, a pair of pillars 104a, 104b extending upward from the support part 102, and an upper connecting part 106 connecting the pair of pillars 104a, 104b.

[0019] The support portion 102 has a pair of foot portions 112a, 112b and a lower connecting portion 114 connecting the pair of foot portions 112a, 112b. The pair of foot portions 112a, 112b extend in the Y-axis direction (the depth direction from the front side to the rear side of the cover 16). The lower connecting portion 114 connects the lower ends or the vicinity of the lower ends of the pair of support columns 104a, 104b in the left-right direction. The lower connecting portion 114 is disposed on the rear side (+Y direction) of the pair of foot portions 112a, 112b from the position closest to the front side (-Y direction). The vicinity of the lower ends refers to a position closer to the lower ends of the pair of support columns 104a, 104b than the middle position of the pair of support columns 104a, 104b in the up-down direction.

[0020] A reinforcing bracket 116a is fixed between the lower connecting portion 114 and the support column 104a, and a reinforcing bracket 116b is fixed between the lower connecting portion 114 and the support column 104b.

[0021] The various devices are disposed at appropriate positions on the support part 102 in consideration of the weight balance of the mounting frame 14. For example, the various devices are preferably disposed in an area above and between half the length of the pair of foot parts 112a, 112b in the Y-axis direction.

[0022] In this embodiment, the lower connecting portion 114 is preferably disposed on the rear side, at the rearmost position, or near the rearmost position, rather than at the center between the most front side (-Y direction) and the most rear side (+Y direction) positions of the pair of foot portions 112a, 112b. That is, the support portion 102 is preferably formed in a substantially U-shape. The floor surface is opened in the area from the rear side to the front side (-Y direction) of the lower connecting portion 114 so that the worker can enter and exit. That is, the area from the rear side to the front side (-Y direction) of the lower connecting portion 114 is formed ribless, without ribs, as an area where the worker can step in so that the soles of the feet touch the floor surface, with nothing in the space from the floor surface to the various devices or the space from the floor surface to the ceiling board 42. The lower connecting portion 114 and the pair of foot portions 112a, 112b cooperate to form a roughly rectangular area into which a worker can step at a position further forward than the lower connecting portion 114, which is positioned rearward of the most frontward position of the foot portions 112a, 112b.

[0023] Wheels 122 are attached to the front side (-Y direction) of the foot portions 112a, 112b of the mounting frame 14. The wheels 122 are in constant contact with the floor surface. Note that recesses (storage spaces) 23a, 23b for accommodating the wheels 122 are provided at the frontmost (-Y direction) positions of the base plates 22a, 22b of the base 12.

[0024] The lower end of the cover 16 is fixed to the outer region of the upper surfaces of the pair of base plates 22a, 22b of the base 12, and the bases 82 of the slide rails 72a, 72b are fixed to the inner region of the upper surfaces of the base plates 22a, 22b.

[0025] In addition, with holes along the Z axis of the slide rails 72a, 72b aligned with appropriate holes in the foot portions 112a, 112b of the mounting frame 14 aligned with each other, a lock pin (stopper) 130 is attached to the communicating hole.

[0026] The operation of the panel structure 10 according to this embodiment will be described.

[0027] As shown in FIG. 2, in a state where the door 34 is opened with respect to the cover body 32, the worker removes the lock pin 130 and pulls out the mounting frame 14 from the opening 52 of the cover 16. The movable bodies 84 of the slide rails 72a and 72b fixed to the mounting frame 14 move in the −Y direction with respect to the base bodies 82 of the slide rails 72a and 72b fixed to the base 12. Therefore, the mounting frame 14 moves from inside the cover body 32 to the front side (door 34 side) through the first opening 52 with respect to the base 12 by the action of the slide rails 72a and 72b. Therefore, a part or the whole of the mounting frame 14 is pulled out to the outside of the cover body 32. Note that whether a part or the whole of the mounting frame 14 is pulled out to the outside through the first opening 52 of the cover body 32 depends on the movable distance of the movable bodies 84 of the slide rails 72a and 72b.

[0028] When the door 34 is opened and the mounting frame 14 is pulled out through the first opening 52 of the cover 16, the wheels 122 support the load of the mounting frame 14 to which various devices are attached. This reduces the load on the movable body 84 of the slide rails 72a, 72b that supports the weight of the mounting frame 14 to which various devices are attached, and suppresses bending deformation of the movable body 84. At this time, the convex parts 64a, 64b provided on the side plates 44a, 44b of the cover 16 support the upper parts of the support columns 104a, 104b of the mounting frame 14. For this reason, the convex parts 64a, 64b are used as vibration stoppers, and the vibration of the mounting frame 14 in the left-right direction is suppressed by the convex parts 64a, 64b.

[0029] In this way, the mounting frame 14 is partially or entirely drawn out to the front side through the first opening 52 of the cover 16 while suppressing vibration to various devices. It is preferable that the mounting frame 14 is exposed to the outside of the cover body 32, for example, with at least a portion of the supports 104a, 104b passing through the first opening 52 of the cover body 32.

[0030] Among the foot parts 112a, 112b of the mounting frame 14, there is no member such as a reinforcing rib extending in the Y-axis direction at or near the frontmost position. Therefore, when the mounting frame 14 is in a state where it is pulled out from the cover 16, the worker can step on the floor surface at the frontmost position of the area between the foot parts 112a, 112b of the mounting frame 14. Therefore, the distance between the mounting frame 14 and the worker can be shortened, and the worker can work on the mounting frame 14 at a place where the interference between the cover 16 and the base 12 is reduced. In addition, the cover 16 may have a configuration without a bottom surface. In that case, even when the mounting frame 14 is not pulled out from the cover 16, the worker can step on the floor surface at the frontmost position of the area between the foot parts 112a, 112b of the mounting frame 14. Furthermore, the connector 24 of the base 12 may be located at the rearmost position as shown in this embodiment. In this case, even when the mounting frame 14 is not pulled out from the cover 16, the worker can step onto the floor surface at the frontmost position in the area between the foot parts 112a, 112b of the mounting frame 14 without any obstacles. However, the cover 16 is not limited to a configuration without a bottom surface. In addition, the base 12 is not limited to a configuration in which the connector 24 is located at the rearmost position.

[0031] Then, before an operator performs work on various devices, a lock pin 130 is attached to suppress movement of the mounting frame 14 relative to the base 12 and the cover 16. The lock pin 130 is inserted into two holes while the axis of the hole in the mounting frame 14 and the axis of the hole in the base 12 are aligned in the Z-axis direction, thereby fixing the mounting frame 14 and the base 12. This prevents the mounting frame 14 from unexpectedly moving relative to the base 12 and the cover 16 due to vibration or the like. The method is not limited to the method using the lock pin 130, and the mounting frame 14 may be suppressed from moving relative to the base 12 and the cover 16 by a snap-fit ​​structure. Furthermore, the structure for suppressing movement between the cover 16 and the mounting frame 14 is not limited to the snap-fit ​​structure, and a known structure for suppressing movement between the protrusion 64a or 64b of the cover 16 and the mounting frame 14 may be used.

[0032] When work on the various devices is completed, the worker temporarily removes the lock pin 130 and stores the mounting frame 14 in the cover 16. Then, the worker attaches the lock pin 130 again to restrict movement of the mounting frame 14 relative to the base 12 and the cover 16. The lock pin 130 is inserted into two holes with the axis of the hole in the mounting frame 14 and the axis of the hole in the base 12 aligned in the Z-axis direction, thereby fixing the mounting frame 14 and the base 12 together. This prevents the mounting frame 14 from being accidentally pulled out through the first opening 52 due to vibration or the like.

[0033] When the mounting frame 14 is not pulled out through the first opening 52 of the cover 16, that is, when the mounting frame 14 is housed within the cover 16, the protrusions 64a, 64b suppress vibration of the mounting frame 14 relative to the cover 16. Providing a lock 34a on the door 34 prevents the door 34 from opening unintentionally.

[0034] The mounting frame 14 exerts an appropriate strength due to a reinforcing bracket 116a between the lower connecting portion 114 of the support portion 102 and the support column 104a, and a reinforcing bracket 116b between the lower connecting portion 114 and the support column 104b. The cover 16 exerts an appropriate strength due to the protruding portions 64a, 64b extending in the Y-axis direction. Therefore, the panel structure 10 ensures an appropriate strength.

[0035] In addition, the lower connecting portion 114 connecting the pair of foot portions 112a, 112b may be, for example, two or more in parallel to the X-axis. For example, it is assumed that various devices are arranged in an upper region between half the length of the pair of foot portions 112a, 112b in the Y-axis direction. In this case, it is preferable that the lower connecting portion 114 is provided between, for example, 1 / 3 of the length of the depth direction of the pair of foot portions 112a, 112b from the front side to the rear side to the position on the rearmost side. If the lower connecting portion 114 is formed in such a position, a worker can perform appropriate work on the mounting frame 14 while stepping on the floor surface between the pair of foot portions 112a, 112b without stepping on the lower connecting portion 114.

[0036] As described above, the following can be said according to the panel structure 10 for a switchgear / control panel according to this embodiment.

[0037] The distance between the worker and the various devices of the mounting frame 14 can be reduced, allowing the worker to take a working posture closer to being upright. Therefore, by using the panel structure 10 according to this embodiment, when the worker performs various tasks on the work surfaces of the various devices of the mounting frame 14, the burden on the worker's body is reduced, the worker is less likely to become fatigued, and the accuracy of the work can be expected to improve. Also, when the worker uses, for example, a step stool, the step stool can be placed near the work surface and on a flat floor surface (ground). Therefore, the worker can use the step stool more safely.

[0038] The work surface here refers to the position where the worker attaches various devices to the mounting frame 14, the position where the worker performs work during maintenance, and other positions that the worker touches during maintenance.

[0039] Except for large panels such as tunnel-type panels, typical box-shaped panel structures for switchboards and control panels are not designed to be stepped into. Therefore, during manufacturing and maintenance work for switchboard and control panel structures, there is always a distance between the worker and the work surface that is proportional to the depth of the box. This can lead to problems such as reduced work accuracy and increased physical strain on the worker, making work more difficult.

[0040] In order to approach the work surface in a typical box-shaped switchboard / control panel structure, the only way is to enter the switchboard / control panel structure, but this poses the following challenges: (1) At the bottom of the panel structure for switchboards and control panels, there is a step caused by the bottom plate that is in tight contact with the door surface, making it difficult to place feet and creating a risk of workers tripping. (2) The bottom plate of the panel structure for switchboards and control panels is part of the product, and workers are reluctant to place their feet on it.

[0041] In the panel structure 10 according to this embodiment, when a worker performs maintenance or the like on various devices of the mounting frame 14, the soles of the worker's feet come into contact with the floor surface, not a part of the panel structure 10. Therefore, there is no need to consider the step between the floor surface and the panel structure 10 at the position where the worker performs his / her work. Also, it is possible to prevent the worker from stepping on the panel structure 10. Therefore, the panel structure 10 according to this embodiment does not have the problems (1) and (2).

[0042] As described above, in this embodiment, the panel structure 10 opens the floor surface to allow workers to enter and exit the area extending from the rear side toward the front side of the lower connecting portion 114 of the frame 14. The area of ​​the frame 14 extending from the lower connecting portion 114 toward the front side is formed as an area where the feet of the worker touch the floor surface. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14.

[0043] In this embodiment, an example in which the door 34 opens on one side has been described, but the door 34 may open on both sides.

[0044] (First Modification) Next, a first modified example of the panel structure 10 for a switchboard / control panel will be described with reference to FIG.

[0045] The panel structure 10 of this modified example does not use the lock pin 130.

[0046] A link mechanism 140 is provided between the upper connecting portion 106 of the mounting frame 14 and the upper end portion of the door 34. When the door 34 is opened, the mounting frame 14 moves to the front side through the opening 52 of the cover 16 along the pair of slide rails 72a, 72b via the link mechanism 140 in accordance with the rotation of the door 34 about the hinge 36. As a result, a part of the front side of the mounting frame 14 is exposed to the outside of the cover 16 through the opening 52 of the cover 16.

[0047] When the door 34 is opened and the link mechanism 140 is fully extended, the door 34 is locked against rotation relative to the cover body 32 and the movement of the mounting frame 14 relative to the cover 16 is restricted.

[0048] When the door 34 is closed, the mounting frame 14 is moved along the pair of slide rails 72a, 72b via the link mechanism 140 and is accommodated in the cover 16 through the opening 52 of the cover 16.

[0049] In this manner, by connecting the mounting frame 14 and the door 34 with the link mechanism 140, the door 34 can be opened and closed and the mounting frame 14 can be moved simultaneously.

[0050] (Second Modification) Next, a second modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 4. In Fig. 4, the cover 16 is omitted from illustration.

[0051] In the panel structure 10 of this modified example, the slide structure 70 does not use a pair of slide rails 72a, 72b.

[0052] The slide structure 70 has guide wheels 162 provided on a pair of foot parts 112a, 112b of the mounting frame 14, and guide grooves 164 provided on the base plates 22a, 22b of the base 12. The foot parts 112a, 112b of the mounting frame 14 are provided with the guide wheels 162 that roll on the base 12. The upper surfaces of the base plates 22a, 22b of the base 12 are provided with guide grooves 164 along which the guide wheels 162 move. The end face of the guide groove 164 on the front side in the Y-axis direction is located closer to the rear side than the end faces of the front sides of the base plates 22a, 22b. The end face of the guide groove 164 on the rear side in the Y-axis direction is located closer to the front side than the end faces of the rear sides of the base plates 22a, 22b. Therefore, the end faces of the guide groove 164 define the movable range of the guide wheels 162.

[0053] According to this modification, when performing maintenance on the sliding of the mounting frame 14 relative to the base 12, the maintenance needs only to clean or replace the guide wheels 162 and clean the guide grooves 164. Therefore, maintenance of the sliding of the mounting frame 14 relative to the base 12 is easy.

[0054] (Third Modification) Next, a third modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 5. In Fig. 5, the first door 34 is omitted from the illustration.

[0055] The slide structure 70 of the panel structure 10 of this modified example does not use the slide rails 72a, 72b. In addition, the foot parts 112a, 112b and the wheels 122 of the support part 102 of the mounting frame 14 are not necessary.

[0056] The slide structure 70 has frame-side guides 172 provided on the support posts 104a, 104b of the mounting frame 14, and cover-side guides 174 provided on the protrusions 64a, 64b.

[0057] The posts 104a and 104b of the mounting frame 14 are suspended by protrusions 64a and 64b provided on the side plates 44a and 44b. The posts 104a and 104b of the mounting frame 14 are movable relative to the protrusions 64a and 64b of the cover 16 along the Y-axis direction.

[0058] This can reduce obstacles at the bottom of the mounting frame 14. Although a lower connecting portion 114 that connects the lower portions of the supports 104a, 104b is provided, the foot portions 112a, 112b are not necessary, which can further improve the workability from the left or right direction of the mounting frame 14.

[0059] 6, the lower end of the cover 16 may be fastened directly to an anchor bolt 26 embedded in the floor surface. In this case, the base 12 of the panel structure 10 becomes unnecessary.

[0060] That is, the panel structure 10 for a switchboard / control panel according to this modification has a box-shaped cover 16 and a frame 14 in which various devices are arranged. The cover 16 is erected on a floor surface and has a ceiling plate 42, a pair of side plates 44a, 44b fixed to the ceiling plate 42, a cover body 32 having a first opening 52 on the front side, and a first door 34 supported by the cover body 32 for opening and closing the first opening 52. The frame 14 has a pair of support columns 104a, 104b spaced apart in the left-right direction when viewed from the front side of the cover 16 and extending upward, and a lower connecting portion 114 connecting the lower ends or the vicinity of the lower ends of the pair of support columns 104a, 104b in the left-right direction. The frame 14 opens the floor surface so that an operator can enter and exit an area extending from the rear side to the front side through the lower connecting portion 114.

[0061] With this configuration, a panel structure 10 can be provided that can shorten the distance between the worker and the various equipment attached to the frame 14.

[0062] (Fourth Modification) Next, a fourth modified example of the panel structure 10 for a switchboard / control panel will be described with reference to FIG.

[0063] The cover 16 has a first door 34 and a second door 38. The first door 34 is supported on the front side of the cover body 32 via a hinge 36. The second door 38 is supported on the rear side of the cover body 32 via a hinge 40.

[0064] The base 12 is generally H-shaped with the front side (first door 34 side) and the back side (second door 38 side) open. The support portion 102 of the mounting frame 14, i.e., the pair of foot portions 112a, 112b and the lower connecting portion 114, are generally H-shaped with the front side (first door 34 side) and the back side (second door 38 side) open.

[0065] 1 and 2 are an example in which a movable body 84 moves in only one direction relative to a base body 82. In this modification, in addition to being able to move the movable body 84 to the front side relative to the base body 82 through a first opening 52, the slide rails 72a and 72b are also able to move the movable body 84 to the rear side through a second opening 54 on the opposite side to the front side.

[0066] In this way, by using slide rails 72a, 72b that move in two directions, front travel and rear travel, the mounting frame 14 can be pulled out to the front side of the panel structure 10 and also to the rear side relative to the base 12 and cover 16.

[0067] The base 12 defines an area on the front side where an operator steps by using the pair of base plates 22a, 22b and the connector 24. The mounting frame 14 defines an area on the front side where an operator steps by using the pair of foot portions 112a, 112b and the lower connector 114.

[0068] The base 12 defines an area on the rear side where an operator steps by using the pair of base plates 22a, 22b and the connector 24. The mounting frame 14 defines an area on the rear side where an operator steps by using the pair of foot portions 112a, 112b and the lower connector 114.

[0069] The lower connecting portion 114 is preferably provided between 1 / 3 and 2 / 3 of the depth of the pair of foot portions 112a, 112b from the front side to the rear side. If the lower connecting portion 114 is formed at such a position, a worker can step onto the floor surface between the pair of foot portions 112a, 112b from the front side or step onto the floor surface between the pair of foot portions 112a, 112b from the rear side, and perform appropriate work on the mounting frame 14 without stepping on the lower connecting portion 114.

[0070] [Second embodiment] A panel structure 10 for a switchboard / control panel according to the second embodiment will be described with reference to Figs. 8 and 9. Figs.

[0071] 8, the cover body 32 of the present embodiment does not use the back plate 46 (see FIG. 1). The cover body 32 has a first opening 52 and a second opening .

[0072] In this embodiment, the cover 16 is movable with respect to the base 12 and the mounting frame 14. That is, the cover 16 is movable so as to retreat relative to the base 12 and the mounting frame 14, and the movement of the cover 16 relative to the mounting frame 14 makes it easier for an operator to approach the working surface of the mounting frame 14. The mounting frame 14 and slide rails 72a and 72b are fastened to the base 12. The cover 16 is attached to the slide rails 72a and 72b.

[0073] Specifically, the foot portion 112a of the mounting frame 14 is fixed to a position on the inside (+X side) of the upper surface of the base plate 22a of the base 12, facing the base plate 22b. The slide rail 72a is fixed to a position on the outside (-X side) of the upper surface of the base plate 22a of the base 12, facing the opposite side to the base plate 22b. The lower end of the cover 16 is fixed to the movable body 84 of the slide rail 72a.

[0074] Similarly, a foot portion 112b of the mounting frame 14 is fixed to a position on the inside (-X side) of the upper surface of the base plate 22b of the base 12, facing the base plate 22a. A slide rail 72b is fixed to a position on the outside (+X side) of the upper surface of the base plate 22b of the base 12, facing the opposite side to the base plate 22a. A lower end of the cover 16 is fixed to a movable body 84 of the slide rail 72b.

[0075] In this embodiment, as shown in Fig. 9, the cover 16 can be moved to the rear side (+Y side) opposite the work surface with respect to the base 12 by the action of the slide rails 72a, 72b. This allows the worker to work on various devices of the mounting frame 14 from the front side of the panel structure 10 after removing the interference of the cover 16. The worker can also approach the mounting frame 14 from the side.

[0076] When the cover 16 is placed on the base 12 and the mounting frame 14 is stored inside the cover 16, a lock pin 130 is used to fix the cover 16 and the mounting frame 14 and / or the cover 16 and the base 12. This prevents the mounting frame 14 from being exposed relative to the cover 16 due to vibration or other factors, thereby preventing damage and ensuring the strength of the panel structure 10.

[0077] The cover 16 can also move to the front side (-Y side) with respect to the base 12 by the action of the slide rails 72a and 72b. This allows the worker to work on various devices of the mounting frame 14 from the rear side of the panel structure 10 after removing the interference of the cover 16. The worker can also approach the mounting frame 14 from the side.

[0078] The panel structure 10 for a switchboard / control panel according to this embodiment includes a base 12 fixed to a floor surface, a frame 14 on which various devices are arranged and supported by the base 12, and a cover 16. The cover 16 includes a box-shaped cover body 32 capable of accommodating the frame 14, a first door 34, and a sliding structure 70. The cover body 32 stands upright on the base 12 and includes a ceiling plate 42, a pair of side plates 44a and 44b fixed to the ceiling plate 42, and a first opening 52 formed on the front side by the ceiling plate 42 and the pair of side plates 44a and 44b. The first door 34 is supported by the cover body 32 and opens and closes the first opening 52. The sliding structure 70 slides the cover body 32 relative to the base 12 in the depth direction from the front side to the rear side. The cover 16 exposes at least a part of the frame 14 through the first opening 52 by the sliding structure 70.

[0079] In the panel structure 10 according to this embodiment, the work surface of the frame 14 can be exposed by moving the cover 16 relative to the base 12 and the frame 14. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14. Furthermore, the panel structure 10 opens the floor surface to allow workers to enter and exit an area extending from the rear side toward the front side of the lower connecting portion 114 of the frame 14, and an area extending from the front side toward the rear side of the lower connecting portion 114. The area of ​​the frame 14 extending from the lower connecting portion 114 toward the front side is formed as an area where the feet of the worker are placed on the floor surface. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14.

[0080] (First Modification) Next, a first modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 10. In Fig. 10, the first door 34 is omitted from the illustration.

[0081] 10, a door support wheel 39 is attached to the lower end of the second door 38 on the side away from the hinge 40. When the cover 16 is moved and the second door 38 is fully opened, the door support wheel 39 is used as a load support point on the second door 38 at a position away from the hinge 40. Therefore, the panel structure 10 can reduce bending deformation of the slide rails 72a, 72b, for example.

[0082] In addition, when the second door 38 is closed relative to the cover 16, the door support wheels 39 are stored in the recesses 23a, 23b (see Figures 1 and 4) of the base plates 22a, 22b to prevent interference with the base 12.

[0083] (Second Modification) Next, a second modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 11. In Fig. 11, the first door 34 is omitted from illustration.

[0084] The slide structure 70 of the panel structure 10 in Fig. 11 does not include the slide rails 72a and 72b. The slide structure 70 has an actuator 152 and a moving guide 154 for connecting the base 12 and the cover 16. As the actuator 152, an appropriate one such as an air cylinder or a hydraulic cylinder can be used.

[0085] A lower end 152a of the actuator 152 is supported by the base 12 or the mounting frame 14. An upper end 152b of the actuator 152 is supported by the side plates 44a, 44b of the cover 16 by a pivot pin 158.

[0086] The movable guide 154 is fixed to the base 12. An engagement pin 156 is fixed to the pair of side plates 44a, 44b of the cover 16. The movable guide 154 has an arc-shaped guide groove 154a with which the engagement pin 156 engages. When the engagement pin 156 is in a locked position where it is disengaged from the arc-shaped portion of the guide groove 154a, the mounting frame 14 is accommodated within the cover 16.

[0087] With the mounting frame 14 housed within the cover 16, the first door 34 or the second door 38 is opened. For example, with respect to the base 12 and the mounting frame 14, the worker slightly lifts the cover 16 while keeping the engagement pin 156 engaged with the guide groove 154a of the moving guide 154. At this time, the actuator 152 receives a force from the pivot pin 158 and acts to assist the force to lift the cover 16. Therefore, with the assistance of the actuator 152, the worker can easily lift the cover 16 with a light force with respect to the base 12 and the mounting frame 14.

[0088] In this state, the engaging pin 156 is moved from the locking position where it is displaced from the arc-shaped portion of the guide groove 154a to the arc-shaped portion. Then, by moving the engaging pin 156 in an arc shape along the guide groove 154a, the worker can appropriately move the cover 16 to the front side or rear side with respect to the base 12 and the mounting frame 14. Note that the two-dot chain line in FIG. 11 indicates a state where the cover 16 has been moved to the rear side with respect to the base 12 and the mounting frame 14. Note that, when returning the engaging pin 156 to the locking position where it is displaced from the arc-shaped portion of the guide groove 154a, the worker can easily lift the cover 16 with a light force with the assistance of the actuator 152 with respect to the base 12 and the mounting frame 14 and return it to its original position.

[0089] [Third embodiment] Next, a third embodiment of a panel structure 10 for a distribution board / control board will be described with reference to Fig. 12. A mounting frame 14 is fixed to a base 12 of the panel structure 10 according to this embodiment. Also, a cover 16 is fixed to the base 12 of the panel structure 10 according to this embodiment. That is, the mounting frame 14 and the cover 16 are fixed to the base 12.

[0090] 12, the first door 34 is attached to the front side of the cover 16, and there is no second door 38. That is, the cover 16 has a back panel 46.

[0091] The base 12 is generally U-shaped with an open front side (first door 34 side). The pair of foot portions 112a, 112b and the lower connecting portion 114 of the mounting frame 14 are generally U-shaped with an open front side (first door 34 side). For this reason, in the panel structure 10, an operator can easily approach the work surface of the mounting frame 14.

[0092] The reinforcing frame 182 can be attached and detached by, for example, screwing or snap-fitting near the front end of the base plates 22a, 22b of the base 12, or near the lower end of the frontmost side of the cover body 32. The reinforcing frame 182 can be easily removed during work. By removing the reinforcing frame 182 during work, the step at the bottom of the panel structure 10 is eliminated, allowing the worker to step on the floor surface inside the panel structure 10. Therefore, in the panel structure 10, the worker can approach the work surface of the mounting frame 14 through the first opening 52 of the cover 16.

[0093] When an operator is not working on the mounting frame 14, the reinforcing frame 182 is attached near the front end of the base 12 or near the lower end of the frontmost side of the cover body 32. Therefore, the panel structure 10 can maintain the same strength as a conventional box structure in normal times.

[0094] In this embodiment, the panel structure 10 opens the floor surface to allow workers to enter and exit the area extending from the rear side to the front side of the lower connecting portion 114 of the frame 14. The area of ​​the frame 14 extending from the lower connecting portion 114 to the front side is formed as an area where the feet of the worker touch the floor surface. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14.

[0095] (First Modification) Next, a first modified example of the panel structure 10 for a switchboard / control panel will be described with reference to FIG.

[0096] The cover 16 has a first door 34 and a second door 38. The base 12 is substantially H-shaped with the front side (first door 34 side) and the back side (second door 38 side) open. The support portion 102 of the mounting frame 14, i.e., the pair of foot portions 112a, 112b and the lower connecting portion 114, are substantially H-shaped with the front side (first door 34 side) and the back side (second door 38 side) open. For this reason, the panel structure 10 allows an operator to easily approach the work surface of the mounting frame 14 from the front side by opening the first door 34, or from the back side by opening the second door 38.

[0097] Furthermore, it is preferable that the reinforcing frame 182 be detachable from the base plates 22a, 22b or the cover body 32, for example, so as to connect the frontmost ends of the base plates 22a, 22b and the rearmost ends of the base plates 22a, 22b.

[0098] (Second Modification) Next, a second modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 14. In Fig. 14, the mounting frame 14 and the first door 34 are omitted from illustration.

[0099] The reinforcing frame 182 is detachably attached near the front end of the base 12 or near the lower end of the frontmost side of the cover body 32. A substantially rectangular packing 184 is detachably attached to the entire periphery of the first opening 52 of the cover 16. The packing 184 abuts, for example, against the frontmost end faces of the base plates 22a, 22b of the base 12. When the first door 34 (not shown) is closed, the packing 184 seals the gap between the first door 34 and the first opening 52. This allows the panel structure 10 of this modified example to ensure dustproof performance equivalent to that of a conventional box-shaped structure.

[0100] In addition, instead of abutting against the front-most end faces of the base plates 22a, 22b of the base 12, or in addition to abutting against the front-most end faces of the base plates 22a, 22b of the base 12, it is also preferable for the gasket 184 to abut against the front-most end face of the reinforcing frame 182.

[0101] (Third Modification) Next, a third modified example of the panel structure 10 for a switchboard / control panel will be described with reference to Fig. 15. In Fig. 15, the mounting frame 14 and the first door 34 are omitted from illustration.

[0102] The reinforcing frame 182 is rotatably attached to one of the base plates 22a, 22b of the base 12 or the cover body 32 by means of hinges 183. When an operator approaches the mounting frame 14, the operator rotates the reinforcing frame 182 as shown by the two-dot chain line in Fig. 15. After completing maintenance of the various devices and before closing the first door 34, the operator places the reinforcing frame 182 as shown by the solid line in Fig. 15 and fixes it to the side panel 44b.

[0103] In this way, by integrating the reinforcing frame 21 with the panel structure 10, it is possible to prevent the reinforcing frame 21 from being lost. During work, the reinforcing frame 21 is flipped up along the Z-axis, and during non-work, the reinforcing frame 21 is arranged along the X-axis. This eliminates the need to attach and detach the reinforcing frame 182, reducing the burden on the worker.

[0104] [Fourth embodiment] Next, a fourth embodiment of the panel structure 10 for a distribution board / control board will be described with reference to Fig. 16. The fourth embodiment is a modified example of the cover 16 of the panel structure 10. The cover 16 of the panel structure 10 of this embodiment can be used for the cover 16 of the first to third embodiments.

[0105] The cover 16 has a cover body 32, a first door 34, and a first auxiliary door 192. A hinge 193 of the first auxiliary door 192 is supported by a side plate 44b that faces the side plate 44a to which the hinge 36 of the first door 34 is attached, and is located in the +Y direction.

[0106] This allows the cover 16 to approach the mounting frame 14 from the side with the first auxiliary door 192 open. This makes it easier for workers to work on the mounting frame 14.

[0107] When closing the first auxiliary door 192, the first auxiliary door 192 is closed first, and then the first door is closed and locked to the cover 16 using the lock a of the first door .

[0108] In this embodiment, the panel structure 10 opens the floor surface to allow workers to enter and exit the area extending from the rear side to the front side of the lower connecting portion 114 of the frame 14. The area of ​​the frame 14 extending from the lower connecting portion 114 to the front side is formed as an area where the feet of the worker touch the floor surface. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14.

[0109] (First Modification) Next, a first modified example of the panel structure 10 for a switchboard / control panel will be described with reference to FIG.

[0110] The cover body 32 has a second auxiliary door 194 in place of the side panel 44a. A hinge (not shown) of the second auxiliary door 194 is attached to the rear panel 46 of the cover body 32 at a position in the -X direction, relative to the hinge 193 of the first auxiliary door 192 in the +Y direction.

[0111] This allows the cover 16 to approach the mounting frame 14 from the side with the second auxiliary door 194 open. This makes it easier for workers to work on the mounting frame 14.

[0112] The second auxiliary door 194 can be locked to the cover body 32 .

[0113] [Fifth embodiment] Next, a fifth embodiment of a panel structure 10 for a distribution panel / control panel will be described with reference to Fig. 18. The structure of the support part 102 of the mounting frame 14 of the panel structure 10 of this embodiment can be the same as the structure of the support part 102 of the mounting frame 14 of the first to fourth embodiments.

[0114] The mounting frame 14 has a support part 102, a lower rotation bearing part 204 provided on the lower connecting part 114 of the support part 102, an upper rotation bearing part 206 provided on the ceiling plate 42 of the cover 16, and a support pillar 208 supported by the lower rotation bearing part 204 and the upper rotation bearing part 206. The lower end of the support pillar 208 is supported by the lower rotation bearing part 204, and the upper end is supported by the upper rotation bearing part 206. An attachment part 210 to which various devices are attached is fixed to the support pillar 208. An example of the attachment part 210 is a plate-like part parallel to the Z-axis.

[0115] The support posts 208 and the mounting parts 210 of the mounting frame 14 can be rotated at any angle. This allows the distance between the worker and the device attached, for example, near the end of the plate-like mounting part 210 (the side away from the support posts 208 in the radial direction perpendicular to the Z axis) to be reduced, improving the worker's workability.

[0116] In this embodiment, the panel structure 10 opens the floor surface to allow workers to enter and exit the area extending from the rear side to the front side of the lower connecting portion 114 of the frame 14. The area of ​​the frame 14 extending from the lower connecting portion 114 to the front side is formed as an area where the feet of the worker touch the floor surface. Therefore, according to this embodiment, it is possible to provide a panel structure 10 that can shorten the distance between the worker and various devices attached to the frame 14.

[0117] According to at least one of the embodiments described above, a panel structure 10 can be provided that can shorten the distance between the worker and various devices attached to the frame.

[0118] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. The following is a summary of the claims of this application as filed. [Appendix 1] A box-shaped cover that is provided upright on a floor surface and has a first door that opens and closes a first opening formed on a front side; A frame that is housed inside the cover and in which various devices are arranged, A pair of support columns extending upward and spaced apart in the left-right direction when viewed from the front side of the cover; and A lower connecting portion that connects the lower ends or the vicinity of the lower ends of the pair of columns in the left-right direction; a frame having a lower connecting portion and a front portion formed as an area where a worker's feet are placed on a floor surface; A panel structure equipped with: [Appendix 2] the frame includes a pair of foot portions extending in a depth direction from the front side to the rear side of the cover and connected to each other by the lower connecting portion; The panel structure described in Appendix 1, wherein the lower connecting portion cooperates with the pair of foot portions to form a substantially rectangular area at a front side position of the lower connecting portion. [Appendix 3] A base is provided which is fixed to the floor surface, the frame has a slide structure that is slidable relative to the base in a depth direction from a front side to a rear side of the cover, The cover is fixed to the base. Panel structure as described in Appendix 1 or Appendix 2. [Appendix 4] A base is provided which is fixed to the floor surface, the cover has a sliding structure that allows the cover to slide relative to the base in a depth direction from a front side to a rear side of the cover, The frame is fixed to the base. Panel structure as described in Appendix 1 or Appendix 2. [Appendix 5] the cover includes a second door for opening and closing a second opening formed on a rear side opposite to the front side, The frame is capable of exposing a part of the various devices to the outside of the cover through the second opening. Panel structure described in Appendix 4. [Appendix 6] A panel structure as described in any one of Appendix 1 to Appendix 5, wherein the cover has a reinforcing frame that can be attached and detached at the front-most position. [Appendix 7] A panel structure described in any one of Appendix 1 to Appendix 6, having a lock that is detachable from the frame or the cover and that secures the cover to the frame when attached. [Appendix 8] A base fixed to a floor surface; a frame on which various devices are arranged and supported by the base; a box-shaped cover body that is erected on the base, has a first opening formed on a front side, and is capable of accommodating the frame; a first door supported by the cover body and configured to open and close the first opening; and A sliding structure that slides the cover body in the depth direction from the front side to the rear side relative to the base. a cover having a sliding structure for exposing at least a portion of the frame through the first opening; This panel structure is for a switchboard and control panel. [Appendix 9] The cover body has a second opening on a rear side, The cover exposes at least a portion of the frame through the second opening by the sliding structure. Panel structure described in Appendix 8. [Explanation of symbols]

[0119] 10...board structure for power distribution board / control board, 12...base, 14...mounting frame, 16...cover, 22a, 22b...base plate, 23a, 23b...recess, 24...connecting body, 26...anchor bolt, 32...cover body, 34...door, 34a...lock, 36...hinge, 42...ceiling plate, 44a, 44b...side plate, 46...rear plate, 52...first opening, 64a, 64b...projection, 70...slide structure, 72a, 72b...slide rail, 82...base, 84...movable body, 102...support, 104a, 104b...pillar, 106...upper connecting portion, 112a, 112b...foot portion, 114...lower connecting portion, 116a, 116b...reinforcement bracket, 122...wheel, 130...lock pin

Claims

1. a box-shaped cover provided on a floor surface and having a first door for opening and closing a first opening formed on a front side; A frame that is housed inside the cover and in which various devices are arranged, A pair of support columns extending upward and spaced apart in the left-right direction when viewed from the front side of the cover; and A lower connecting portion that connects the lower ends or the vicinity of the lower ends of the pair of columns in the left-right direction; a frame having a lower connecting portion and a front portion formed as an area where a worker's feet are placed on a floor surface; Equipped with the frame includes a pair of foot portions extending in a depth direction from a front side to a rear side of the cover and connected to each other by the lower connecting portion, The lower connecting portion forms a substantially rectangular region at a position on a front side of the lower connecting portion in cooperation with the pair of foot portions. Board structure.

2. A base is provided which is fixed to the floor surface, the frame has a slide structure that is slidable relative to the base in a depth direction from a front side to a rear side of the cover, The cover is fixed to the base. The panel structure according to claim 1.

3. A box-shaped cover having a first door that is erected against a floor surface and opens and closes a first opening formed on the front side; A frame that is housed inside the cover and in which various devices are arranged, A pair of support columns extending upward and spaced apart in the left-right direction when viewed from the front side of the cover; and A lower connecting portion that connects the lower ends or the vicinity of the lower ends of the pair of columns in the left-right direction; a frame having a lower connecting portion and a front portion formed as an area where a worker's feet are placed on a floor surface; A base fixed to the floor surface; Equipped with the cover has a sliding structure that allows the cover to slide relative to the base in a depth direction from a front side to a rear side of the cover, The frame is fixed to the base. Board structure.

4. the cover includes a second door for opening and closing a second opening formed on a rear side opposite to the front side, The frame is capable of exposing a part of the various devices to the outside of the cover through the second opening. The panel structure according to claim 3.

5. A box-shaped cover having a first door that is erected against a floor surface and opens and closes a first opening formed on the front side; A frame that is housed inside the cover and in which various devices are arranged, A pair of support columns extending upward and spaced apart in the left-right direction when viewed from the front side of the cover; and A lower connecting portion that connects the lower ends or the vicinity of the lower ends of the pair of columns in the left-right direction; a frame having a lower connecting portion and a front portion formed as an area where a worker's feet are placed on a floor surface; Equipped with The cover has a reinforcing frame that is detachably attached to the frontmost position. Board structure.

6. A box-shaped cover having a first door that is erected against a floor surface and opens and closes a first opening formed on the front side; A frame that is housed inside the cover and in which various devices are arranged, A pair of support columns extending upward and spaced apart in the left-right direction when viewed from the front side of the cover; and A lower connecting portion that connects the lower ends or the vicinity of the lower ends of the pair of columns in the left-right direction; a frame having a lower connecting portion and a front portion formed as an area where a worker's feet are placed on a floor surface; a lock that is detachable from the frame or the cover and that fixes the cover to the frame when attached; A panel structure having:

7. A base fixed to a floor surface; a frame on which various devices are arranged and supported by the base; a box-shaped cover body that is erected on the base, has a first opening formed on a front side, and is capable of accommodating the frame; a first door supported by the cover body and configured to open and close the first opening; and A sliding structure that slides the cover body in the depth direction from the front side to the rear side relative to the base. a cover having a sliding structure for exposing at least a portion of the frame through the first opening; A panel structure for a switchboard or control panel.

8. The cover body has a second opening on a rear side, The cover exposes at least a portion of the frame through the second opening by the sliding structure. A panel structure according to claim 7.

Images