Door stopper mechanism

Abstract

To provide a door stopper mechanism capable of easily obtaining a fixed state of a door at an arbitrary opening without requiring troublesome manual work SOLUTION: A door stopper mechanism 1 for fixing a door 102 in an open state includes a first guide plate 2 fixed to a lower part of a back surface of the door in a horizontal width direction, a second guide plate 4 stacked under the first guide plate, and a substantially U-shaped member having one end 9 attached to a lower frame 112 of an opening so as to be axially rotatable and the other end 10 movably inserted into a slit hole 3 of the first guide plate and a long hole of the second guide plate. A stopper pin 8 having a fitting part larger than the outer diameter of the other end part is provided at the lower end of the other end part, and a rotating plate part 6 rotated interlockingly with the vertical movement of a lower rod 24 of a rod latch type lock mechanism 20 under a second guide plate is provided, and a plurality of fitting holes fitted to the fitting part along the longitudinal direction of the long hole are formed, and the fitting part is pushed up and fitted to the fitting hole by rotating displacement in which at least a part of the rotating plate part approaches the lower surface of the second guide plate.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a door stopper mechanism for releasably fixing a single-wing door that opens and closes the opening of a housing such as a cubicle-type high-voltage power receiving facility in an open state, and relates to a door stopper mechanism that can easily fix the door at any door opening angle without requiring any tedious manual work. [Background technology]

[0002] The 6600V high voltage electricity sent from power plants is transformed into 100V or 200V low voltage electricity before being supplied to various facilities and homes. Normally, electricity is supplied to ordinary homes and small facilities via the power company's transformer equipment, but large commercial facilities, office buildings, factories, etc. have high voltage receiving and transforming equipment installed on the demand side to perform the transformation. The mainstream of such high voltage receiving and transforming equipment is the cubicle type, in which a set of equipment that receives electricity at high voltage, transforms it to low voltage, and distributes it to facilities is housed in a metal casing.

[0003] The enclosure of a cubicle-type high-voltage power receiving and transforming equipment generally has a cubic shape with four sides erected on a base and the top covered with a roof, and an opening that allows access to each device is formed on one side, which serves as the front, and a single-wing door that can open and close and close the opening is provided. In a large cubicle-type high-voltage power receiving and transforming equipment 100 such as the one shown in Figure 6, multiple enclosures 101 are installed in succession, and a door 102 is provided at the opening of each enclosure 101.

[0004] Safety inspections and maintenance of high-voltage substation equipment are performed with the door 102 open. Therefore, since it is desirable to keep the door 102 in an open position during work, a door stopper is used between the door 102 and the opening frame on the housing 101 side.

[0005] Such door stoppers typically have a simple structure and are easy to operate, so that the time required for fixing and releasing the door in an open position is not wasted. For example, Patent Document 1 discloses a door stopper that uses a stay with both ends bent 90 degrees in the same direction. This door stopper holds the front door in an open position by inserting the shaft portion of one end of the stay into a shaft hole drilled in the cabinet body and rotating it, and inserting the insertion portion of the other end into a retaining hole drilled in the front door. In this case, the door can be easily fixed in an open position by simply inserting both ends of the stay into the shaft hole and the retaining hole, and the door can be returned to an openable and closable state by simply pulling out the stay.

[0006] However, when the other end of a U-shaped stopper member such as the stay is inserted into a retaining hole on the door to fix the door in an open state, the door can only be opened at a specific angle. In contrast, Patent Document 2 discloses a guide fitting fixed to the door as a means for restricting the movement of the other end of the U-shaped stopper member to keep the door open in a cabinet door stop structure, and describes that the guide fitting can be provided with multiple holes into which the other end of the stopper member can be inserted, allowing the door to be fixed at an optimal opening angle depending on the installation environment. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Publication No. 2019-90234 [Patent Document 2] Patent No. 6068055 Summary of the Invention [Problem to be solved by the invention]

[0008] In conventional door stopper mechanisms, one end of a U-shaped stopper member is journaled on the housing side, and the other end of the stopper member is inserted into a hole on the door side to fix the door in an open position. When fixing the door in the open position and when releasing the fixation, at least the other end of the stopper member must be inserted into the corresponding hole and pulled out.

[0009] This had to be done manually by a worker crouching down, which was a very cumbersome and troublesome task for the worker. In particular, in large cubicle-type high-voltage power receiving equipment, where multiple cabinets and doors are lined up, each time work is performed on a cabinet, the worker must open the door, manually secure it, then release the lock and move on to the next cabinet, repeating this process over and over again, which places a heavy burden on the worker.

[0010] In view of the above problems, the object of the present invention is to provide a door stopper mechanism that, when fixing a door of a cubicle-type high-voltage power receiving facility or the like in an open state in a releasable manner, enables the door fixing and unlocking work to be easily completed with almost no tedious manual work, thereby reducing the burden on the worker compared to conventional methods and improving overall work efficiency. [Means for solving the problem]

[0011] In order to achieve the above object, the door stopper mechanism according to the invention described in claim 1 is, for example, as shown in Figs. 1 to 5, a door stopper mechanism for releasably fixing a single swing door that closes an opening of a housing in an open state, The door is provided with a rod latch type locking mechanism, The rod latch type locking mechanism includes an upper rod and a lower rod that are respectively moved up and down in the distal direction on the back side of the door in conjunction with the rotation of a swing handle on the front side of the door when the door is in a closed state, so that their respective tip ends are engaged with the inside edges of the upper and lower frames of the opening, thereby restricting movement of the door in the opening direction; The door stopper mechanism includes: a first guide plate fixed to the lower back surface of the door across the horizontal width direction of the door, and having a slit hole extending along the horizontal width direction in an area near the door hanger; a second guide plate that is fixed to the underside of the first guide plate and has a long hole drilled therein over an area that overlaps with the slit hole; a stopper pin having a generally U-shape, one end of which is attached to the lower frame so as to be rotatable around an axis, and the other end of which is inserted movably into the slit hole and the elongated hole; a rotating plate portion further installed below the second guide plate, the stopper pin has a fitting portion integrally formed at a lower end of the other end portion that is inserted through the slit hole and the elongated hole, the fitting portion having an outer diameter larger than the outer diameter of the other end portion, the rotating plate portion is connected to a lower portion of the lower rod, and is rotated in conjunction with the up and down movement of the lower rod, so that at least a portion of the rotating plate portion is displaced in a direction toward and away from the lower surface of the second guide plate, and the displacement in the direction toward the lower surface pushes up the fitting portion, The second guide plate is characterized in that it has a plurality of fitting holes formed as enlarged diameter portions of the long hole along the longitudinal direction of the long hole, which fit into the fitting portion pushed up by the rotating plate portion and restrict the movement of the other end of the stopper pin within the slit hole and the long hole.

[0012] According to the door stopper mechanism of the present invention, a rod latch type locking mechanism that restricts the opening of a closed door is used, and a rotating plate portion that is linked to the movement of the lower rod is rotated and displaced in a direction approaching the second guide plate. The rotated and displaced rotating plate portion pushes up a fitting portion provided at the lower end of a U-shaped stopper pin, one end of which is attached to the housing side so as to be rotatable along its axis, and the fitting portion fits into a fitting hole provided in the second guide plate, restricting the movement of the other end portion and fixing the door in an open state.

[0013] Therefore, when the door is in an open state, the worker simply stands and rotates the swing handle on the front side of the door, and the lower rod of the rod latch locking mechanism, which moves in conjunction with the rotation, and the rotating plate portion, which is rotated and displaced thereby, immediately causes the fitting portion at the lower end of the other end of the stopper pin to fit into the fitting hole in the second guide plate, restricting the movement of the other end of the stopper pin, and the door can be fixed in an open state in a short time.

[0014] Furthermore, simply by rotating the swing handle in the opposite direction, the lower rod moves in the opposite direction and the rotating plate portion is rotated and displaced in the direction away from the second guide plate, so that the fitting portion is released from the fitting hole and the other end of the stopper pin becomes movable within the slit hole and the elongated hole, and the door becomes freely rotatable again. Therefore, the door can be closed, but it can also be changed to a different opening angle and fixed.

[0015] As described above, the worker can easily and quickly fix the door in an open state by simply turning the swing handle, without having to crouch down and insert at least the other end of the stopper pin into the fixing hole before working on the equipment inside the housing. This allows the worker to quickly proceed to the work process on the equipment inside the housing, improving actual work efficiency. Furthermore, after work is completed, the worker can close the door in a short time without having to crouch down and manually remove at least the other end of the stopper pin from the corresponding hole.

[0016] In particular, when working on an object with multiple doors, such as a relatively large cubicle-type high-voltage substation, each door must be fixed in the open position, and then the doors must be released and closed, the burden of fixing and releasing each of the doors in the open position is significantly reduced, contributing to the efficiency of the entire work process.

[0017] Furthermore, the degree to which the door opens when fixed by the stopper pin is determined by the engagement position of the engagement portion, which restricts the movement of the other end of the stopper pin, relative to the second guide plate; this engagement position is the position of the engagement hole provided in the second guide plate.

[0018] In the present invention, first, if the fitting portion is not fitted into the fitting hole, the other end of the stopper pin can move back and forth in the longitudinal direction of a slit hole drilled along the horizontal width direction in an area of ​​a first guide plate fixed to the lower back surface of the door across the horizontal width direction of the door, near the door's hanging point, and a long hole drilled across an area overlapping with the slit hole in a second guide plate fixed below the first guide plate, as the door rotates.

[0019] Since a plurality of fitting holes that fit into the fitting portion so as to restrict movement of the other end of the stopper pin are provided along the longitudinal direction of the elongated hole in the second guide plate, the degree to which the door opens varies depending on the position of the fitting portion in each fitting hole. That is, restriction of movement of the other end of the stopper pin by fitting the fitting portion in the fitting hole that is located closest to the hanging point along the elongated hole in the second guide plate results in the largest degree of door opening, and the closer the fitting hole into which the fitting portion fits is located along the elongated hole, the smaller the degree of door opening becomes.

[0020] Therefore, when the swing handle is rotated at a door position that allows the door to open to an appropriate degree depending on the work situation, the rotating plate portion rotates and displaces as the lower rod of the rod latch locking mechanism moves, and the fitting portion of the stopper pin is pushed up and fits into the fitting hole at that position, thereby restricting the movement of the other end of the stopper pin and fixing the door at the appropriate opening.

[0021] Here, the more multiple fitting holes are formed and the smaller the spacing between them, the smaller the steps of change in the door opening. If these fitting holes are formed in a continuous, connected manner, the door opening change will also be almost continuous. Therefore, when forming fitting holes along the elongated holes in the second guide plate, the number and spacing of the fitting holes should be set to correspond to the appropriate number of door openings depending on the target equipment.

[0022] The mechanism for linking the up and down movement of the lower rod with the rotational displacement of the rotating plate, which pushes up the fitting portion of the stopper pin and fits it into the fitting hole, is set appropriately depending on the rotation direction of the rotating plate. The rotational displacement of the rotating plate to secure the door can be linked to either the upward or downward movement of the lower rod, and the same rotation mechanism can be adapted to either, depending on the design of the connecting mechanism between the rotating plate and the lower rod. However, a mechanism with a simpler configuration and which transmits the movement of the lower rod to the rotating plate more efficiently is desirable.

[0023] The door stopper mechanism of the invention described in claim 2 is characterized in that, for example, as shown in Figures 1 to 5, the pivoting plate portion is connected to the lower portion of the lower rod on the door end side so that it pivots and displaces to a state in which it pushes up the fitting portion when the lower rod moves downward.

[0024] The rod latch lock mechanism, which includes an upper rod and a lower rod, is constructed around a latch plate attached to the back of the door relative to the swing handle on the front side of the door so that it directly interacts with the swing handle. Typically, the upper rod extends upward from the attachment position of the latch plate, and the lower rod extends downward from the attachment position of the latch plate.

[0025] Therefore, the upper and lower rods move up and down at positions close to the edge of the door. Therefore, it is efficient for the pivot plate, which is linked to the movement of the lower rod, to be connected to the lower part of the lower rod near the end of the horizontal door width direction.

[0026] According to the door stopper mechanism of claim 2 of the present invention, the downward movement of the lower rod causes the rotating plate member to rotate and displace to a state in which it pushes up the fitting portion, making the locking and unlocking operations more efficient when the door is open.

[0027] This is because when opening the door, the swing handle is rotated to release the rod latch locking mechanism and then pulled open, and generally, as part of this release action, the lower rod is moved upward, releasing it from its hooked state with the bottom frame at its tip.

[0028] In other words, the door stopper mechanism of the present invention is configured so that the drive to move the lower rod, which is moved upward when the door is opened, downward is linked to the rotational displacement of the fixed plate member for fixing the door in an open state, so that the door can be fixed in an open state in the action that follows after opening the door, resulting in the most efficient operation.

[0029] Therefore, in the door stopper mechanism of the present invention, the door can be fixed in the open state by simply rotating the swing handle, which has been rotated to the unlocked position, in the opposite direction to the locked position. As a result, when the door needs to be released from the open state after work on the equipment inside the enclosure is completed, the door can be closed without any problems by simply rotating the swing handle back to the unlocked position.

[0030] The door stopper mechanism of the invention described in claim 3 is characterized in that, as shown in Figures 1 and 2, the rotating plate portion is journaled below the second guide plate so that it can rotate in a seesaw manner around the center of its longitudinal direction, and as the lower rod moves downward, the end portion on the door tip side is forced downward, causing the area near the hanging point to approach the underside of the second guide plate and push up the fitting portion to fit into one of the multiple fitting holes.

[0031] According to the door stopper mechanism of claim 3 of the present invention, the rotating plate portion rotates in a seesaw manner around the center of its longitudinal direction, and the end portion of the rotating plate portion on the door edge side is connected to the lower rod so that the area of ​​the rotating plate portion near the hanging point moves upward, pushing up the fitting portion from below the second guide plate.

[0032] Therefore, the door edge side of the rotating plate is pushed down in conjunction with the downward movement of the lower rod, and the hanging base side of the rotating plate is rotated upward. With this configuration, after the door is opened, the door can be fixed in the open state with just one action of rotating the swing handle to the lock position.

[0033] Furthermore, by setting the rotation center of this seesaw-like rotating plate part closer to the door edge than the longitudinal center, the area from the rotation center to the hanging base side becomes longer than the area toward the door edge, and therefore becomes heavier. In this case, when the downward bias of the lower rod is released, the area of ​​the rotating plate member close to the hanging base side, which was close to the second guide plate, rotates downward due to its own weight, so the fitting part is more easily released from the pushed-up fitting state into the fitting hole, and the load required to release the door fixation is small.

[0034] The door stopper mechanism of the invention described in claim 4 is characterized in that, as shown in Figure 5, one longitudinal side of the pivot plate portion is journaled at both ends so as to be rotatable in the horizontal direction of the door, and the one side is forced downward as the lower rod moves downward, thereby bringing the one side into close proximity with the second guide plate, pushing up the fitting portion and fitting it into one of the multiple fitting holes.

[0035] According to the door stopper mechanism of claim 4 of the present invention, the rotating plate portion is configured to rotate around one longitudinal side thereof as the center of rotation so that the other side thereof opens and closes relative to the underside of the second guide plate.

[0036] In other words, the lower rod and the rotating plate are connected so that when the lower rod moves downward, a downward rotational motion is generated on the one side of the rotating plate, and this downward rotation of the one side causes the rotating plate to rotate and displace so as to close as a whole relative to the second guide plate, thereby pushing up the fitting portion. With this configuration, after the door is opened, the door can be fixed in the open state with just one action of rotating the swing handle to the lock position.

[0037] In the present invention, the first guide plate and the second guide plate are fixed to the rear surface of the door by a method that can provide a stable and appropriate attachment depending on the material of the object. For example, in the case of a typical cubicle-type high-voltage power receiving facility, the housing and the door are made of metal such as galvanized steel plate or stainless steel plate, so it is preferable that the first guide plate and the second guide plate are also made of the same metal and fixed to the door by welding. [Effects of the Invention]

[0038] As explained above, the door stopper mechanism of the present invention utilizes the rod latch type locking mechanism provided on the door to fix and release the door in an open state in conjunction with the vertical movement of the lower rod. This means that the worker does not have to crouch down and perform the tedious manual work of inserting and removing the stopper pin from the corresponding hole, as in the past, and the door can be fixed at any opening angle in a simple and short time, which has the effect of reducing the burden on the worker and improving the efficiency of the entire work. [Brief explanation of the drawings]

[0039] [Figure 1] 1A and 1B are explanatory diagrams showing the configuration of a door stopper mechanism according to a first embodiment of the present invention in an open door state, in which FIG. 1A is a schematic perspective view showing the state before the door is fixed, and FIG. 1B is a schematic perspective view showing the state after the door is fixed. [Figure 2] 2A and 2B are explanatory diagrams showing the relationship between the stopper pin and the first and second guide plates in the door stopper mechanism of FIG. 1, where (a) is a side view showing the state before the door is fixed, and (b) is a side view showing the state after the door is fixed. [Figure 3] 2A and 2B are explanatory diagrams showing the shapes of the first guide plate and the second guide plate in the door stopper mechanism of FIG. 1, where (a) is a schematic side view of the first guide plate and the second guide plate, (b) is a schematic plan view of the first guide plate, and (c) is a schematic bottom view of the second guide plate. [Figure 4] 3 is a schematic bottom view of a second guide plate having fitting holes arranged differently from those in FIG. 2. FIG. [Figure 5]1A and 1B are explanatory diagrams showing the configuration of a door stopper mechanism according to a first embodiment of the present invention, in which (a) is a schematic perspective view showing the state of the door stopper mechanism before the door is fixed, (b) is a side view of (a), (c) is a schematic perspective view showing the state of the door stopper mechanism after the door is fixed, and (d) is a side view of (c). [Figure 6] 1 is a schematic perspective view showing the housing configuration of a cubicle-type high-voltage power receiving facility in which the door stopper mechanism of the present invention is installed. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0040] A first embodiment of the present invention will be described below with reference to the drawings.

[0041] First Embodiment 1 to 4 show a first embodiment of a door stopper mechanism according to the present invention. The door stopper mechanism 1 in this embodiment is installed on each door 102 of a cubicle-type high-voltage power receiving facility 100 as shown in FIG.

[0042] Each door 102 is provided with a rod latch type locking mechanism 20 that restricts the opening of a closed door 102. This mechanism is equipped with a latch plate 21 that rotates on the back side of the door 102 in conjunction with a swing handle 103 on the front side of the door via a rotation shaft that penetrates the door 102, an upper rod 23 that extends upward from one end of the latch plate 21, and a lower rod 24 that extends downward from the other end of the latch plate 21.

[0043] In this locking mechanism 20, when the swing handle 103 is rotated to the locked position, the latch plate 21 rotates, and one end of the latch plate 21 and the other end of the latch plate 21 are aligned at positions furthest apart in the vertical direction. At this time, the upper rod 23 moves upward, and the lower rod 24 moves downward.

[0044] When the door 102 is closed, the up and down movement of the upper and lower rods (23, 24) causes the upper end of the upper rod 23 to hook onto the inside edge of the upper frame 111 of the housing 101, and at the same time, the lower end of the lower rod 24 to hook onto the inside edge of the lower frame 112 of the housing 101, resulting in a locked state in which movement of the door 102 in the opening direction is restricted. In this embodiment, a three-point lock type is shown, which further includes a latch 22 that hooks onto the inside edge of the vertical frame 113 of the housing 101 in the locked state.

[0045] When the door 102 is opened, the swing handle 103 is rotated to the unlocked position, and one end and the other end of the latch plate 21 are aligned horizontally, the upper rod 23 moves downward, the lower rod 24 moves upward, and the latch 22 also rotates away from the vertical frame 113.

[0046] As a result, the upper end of the upper rod 23 is released from its engagement with the edge of the upper frame 111 on the housing 101 side, and at the same time the lower end of the lower rod 24 is released from its engagement with the edge of the lower frame 112 on the housing 101 side, and further the latch latch 22 is also released from its engagement with the edge of the vertical frame 113 on the housing 101 side, so that the door 102 is released from its locked state. Therefore, if the worker pulls the swing handle 103 toward himself while holding it, the door 102 can be opened as shown in FIG. 1(a).

[0047] The door stopper mechanism 1 according to this embodiment is driven in conjunction with the up and down movement of the lower rod 24 of the rod latch type lock mechanism 20 having the above-described configuration. In this door stopper mechanism 1, one end 9 of a substantially U-shaped stopper pin 8 is rotatably supported on the hanging base side of the lower frame 112 of the housing 101, and the other end 10 of the stopper pin 8 is fixed at a predetermined position on the door 102 side, so that the door 102 is fixed at an opening angle determined by the distance and angle corresponding to the length of the main body from one end 9 to the other end 10 of the stopper pin 8.

[0048] The structure for fixing the other end 10 of the stopper pin 8 in position comprises a first guide plate 2 fixed to the lower back surface of the door 102 across the horizontal width of the door by welding or the like, a second guide plate 4 fixed and superimposed on the underside of the first guide plate 2, a rotating plate portion 6 supported below the second guide plate 4 so as to be rotatable in a seesaw manner around a position closer to the door edge than the longitudinal center, and a rotating mechanism for this rotating plate portion 6.

[0049] As shown in Figure 3(b), in the area on the hanging side of the first guide plate 2, a slit hole 3 is drilled along the horizontal width direction of the door, into which the other end 10 of the stopper pin 8 is inserted so that it can move, and in the second guide plate 4, a long hole 5 is drilled over the area overlapping with the slit hole 3, into which the other end 10 of the stopper pin 8 is inserted so that it can move.

[0050] Furthermore, a fitting portion 11 having an outer diameter larger than the outer diameter of the other end 10 is integrally formed at the lower end of the other end 10 of the stopper pin 8. Then, as shown in FIG. 3(c), a fitting hole F that fits into the fitting portion 11 is formed continuously in the longitudinal direction of the elongated hole 5 in the elongated hole 5 of the second guide plate 4. The width of the slit hole 3 and the elongated hole 5 itself is a dimension that allows the other end 10 of the stopper pin 8 to move, and is only required to be slightly larger than the outer diameter of the other end 10 and smaller than the outer diameter of the fitting portion 11. Furthermore, the outer shapes of the fitting portion 11 and the fitting hole F are only required to allow the fitting hole F to fit into the fitting portion 11 from below.

[0051] Therefore, in this embodiment, before the door is fixed in the open position, the other end 10 of the stopper pin 8 can move back and forth along the longitudinal direction within the slit hole 3 of the first guide plate 2 and the elongated hole 5 of the second guide plate 4. Then, by pushing the fitting portion 11 upward and fitting into one of the fitting holes F, the movement of the other end 10 of the stopper pin 8 within the elongated hole 5 is restricted and the position is fixed, so that the door 102 is fixed at the opening angle at that position.

[0052] In this embodiment, the rotating plate portion 6 is configured to push up the fitting portion 11 to an upper position where it fits into the fitting hole F. Specifically, the rotating plate portion 6 rotates and displaces in a seesaw manner around a rotation axis 6c set closer to the door tip than the center in the longitudinal direction, and an area 6a of the rotating plate portion 6 on the hanging side of the rotation axis 6c is rotated and displaced to a position close to the underside of the second guide plate 4, thereby pushing up the fitting portion 11 to the fitting position with the fitting hole F.

[0053] Here, the rotating plate portion 6 is shaped so that a step is provided between an area 6a on the hanging side of the rotation shaft 6c and an area 6b on the door tip side of the rotation shaft 6c, and the upper surfaces of both are parallel to each other, so that the fitting portion 11 can be pushed up in the same way for any fitting hole F along the longitudinal direction of the elongated hole 5. Therefore, the rotation shaft 6 is provided on an inclined portion 6s that forms this step.

[0054] In this embodiment, as shown in Figure 1(b), when the area 6b on the door tip side is pushed downward, the entire area 6a on the hanging side moves upward so that it almost abuts the lower surface of the second plate member 4, pushing the fitting portion 11 up into the fitting hole F. Therefore, the downward movement of the lower rod 24 is used to push the area 6b on the door tip side downward.

[0055] 1 and 2, the lower portion of the lower rod 24 is connected to the connecting portion 7 that protrudes horizontally from the end of the area 6b on the door tip side of the rotating plate portion 6. Here, the lower portion of the lower rod 24 is loosely inserted into the through hole H of the connecting portion 7, and when the lower rod 24 moves downward, an upper pushing member 25 attached to the outer periphery of the lower portion of the lower rod 24 above the through hole H comes into contact with the periphery of the through hole H of the connecting portion 7 and presses it downward.

[0056] Furthermore, in this embodiment, the region 6a on the hanging base side of the rotating plate portion 6 is longer and heavier than the region 6b on the door tip side, so when the lower rod 24 moves upward and the downward bias via the connecting portion 7 at the end of the rotating plate portion 6 on the door tip side is released, the region 6a on the hanging base side is pivoted downward by its own weight, and the fitting portion 11 is released from the pushed-up state to the fitting position with the fitting hole F. This allows the other end 10 of the stopper pin 8 to move again within the elongated hole 5 and the slit hole 3, making it possible to close the door 102.

[0057] According to the door stopper mechanism 1 of this embodiment having the above-described configuration, first, the swing handle 103 is rotated to unlock and open the door 102 of the housing 101 in which work is to be performed on the internal equipment, and then, with the door 102 at the desired opening angle, the door 102 can be secured by simply rotating the swing handle 102 to the lock position.

[0058] That is, the swing handle 102 rotates, and in response, the lower rod 24 of the locking mechanism 20 moves downward, pushing the door-front end of the rotating plate portion 6 downward, causing the area 6a on the hanging side to rotate upward, and the fitting portion 11 of the stopper pin 8 is pushed up and fitted into the fitting hole F of the second guide plate 4, thereby fixing the position of the stopper pin 8 and securing the door 102, as a series of operations.

[0059] After the work is completed, simply by rotating the swing handle 103 to the unlocked position, the lower rod 24 moves upward, releasing the downward force on the door-front end of the rotating plate portion 6, causing the hanging area 6a of the rotating plate portion 6 to rotate downward and disengage from the fitting hole F of the fitting portion 11, and also releasing the restriction on the movement of the other end 10 of the stopper pin 8, allowing the door 102 to rotate and close.

[0060] As described above, the worker can easily complete the fixing of the door 102 in the open state before work and the releasing of the fixing after work in a short time by simply rotating the swing handle 103 while standing, and can move on to work on the next housing 101 efficiently and without any burden.

[0061] In the above embodiment, as shown in Fig. 3(c), the multiple fitting holes F of the second guide plate 4 are formed continuously along the elongated hole 5. This allows the opening degree of the door 102 to be changed almost continuously.

[0062] On the other hand, the open state in which the actual door 102 is fixed does not necessarily require a tight change in opening degree, and it may be sufficient if multiple stages of opening degree can be selected. In this case, as shown in Figure 4, the second guide plate 4' may have a predetermined number of fitting holes F arranged at appropriate intervals along the longitudinal direction of the elongated hole 5' corresponding to the desired multiple stages of opening degree.

[0063] In the first embodiment described above, the door stopper mechanism 1 is shown to be linked to the lock mechanism 20 by a connecting mechanism adapted for when the rotating plate portion 6 rotates in a seesaw manner. However, in the present invention, the rotation direction of the rotating plate portion is not limited to this seesaw type, and it is also possible to apply a mechanism with a different rotation direction.

[0064] A second embodiment of the present invention will be described below, which differs from the first embodiment in the rotating mechanism of the rotating plate portion.

[0065] <Second embodiment> Fig. 5 shows a second embodiment of the door stopper mechanism according to the present invention. Similar to the first embodiment, the door stopper mechanism 31 in this embodiment is installed on each door 102 of a cubicle-type high-voltage power receiving facility 100 as shown in Fig. 6, and has the same basic configuration as the first embodiment except for the rotation mechanism of the rotation plate portion 36.

[0066] Therefore, it corresponds to the door 102 equipped with the rod latch type locking mechanism 20 having the same configuration as in the first embodiment. In addition, the first guide plate 32 fixed to the lower back surface of the door 102 across the horizontal width of the door by welding or the like, and the second guide plate 34 fixed below the first guide plate 32, are also formed with the slit holes 33 and elongated holes 35 similar to those in the first embodiment, and the elongated hole 35 has a plurality of fitting holes F formed continuously or at predetermined intervals along the longitudinal direction.

[0067] Also in this embodiment, one end 39 of the approximately U-shaped stopper pin 38 is rotatably supported on the hanging side of the lower frame 112 of the housing 101, and the other end 40 is fixed at a predetermined position on the door 102 side, thereby fixing the open state of the door 102 at a predetermined opening angle.

[0068] Therefore, before the door is fixed in the open position, the other end 40 of the stopper pin 38 is freely movable within the slit hole 33 of the first guide plate 32 and the elongated hole 35 of the second guide plate 34. The lower end of the other end 40 of the stopper pin 38 is provided with a fitting portion 41 that has a diameter larger than the outer shape of the other end 40 and fits into the fitting hole F.

[0069] In this embodiment, one longitudinal side 36a of the rotating plate 36 is rotatably supported at both ends across the horizontal width of the door, and the rotating plate 36 rotates around this side 36a as a rotation center. The side 36a is connected to the lower part of the lower rod 24 via a connecting portion 37 that protrudes in a direction perpendicular to the support direction of the rotating plate 36 so that the side 36a is urged downward as the lower rod 24 moves downward.

[0070] Specifically, the lower portion of the lower rod 24 is loosely inserted into a through hole H' drilled in the connecting portion 37, and when the lower rod 24 moves downward, an upper push member 25 attached to the outer periphery of the lower rod 24 above the through hole H' abuts against the upper surface of the connecting portion 37 around the through hole H' and presses it downward.

[0071] As a result, when one side 36a is biased to rotate downward, the other side of the rotating plate portion 36 is rotated upward, and the rotating plate portion 36 comes into almost full contact with the underside of the second guide plate 34. The rotating plate portion 36, which has been rotated and displaced to a position where it is almost in contact with the second guide plate 34, pushes up the fitting portion 41, causing it to fit into one of the fitting holes F of the second guide plate 34.

[0072] Furthermore, when the lower rod 24 moves upward, the lower push member 26 attached to the outer periphery of the lower rod 24 below the through hole H' contacts the underside of the connecting portion 37 around the through hole H' and pushes it upward. As a result, when one side 36a is forced to rotate upward, the other side of the rotating plate portion 36 rotates downward and moves away from the second guide plate 34.

[0073] In the door stopper mechanism 31 according to this embodiment having the above configuration, before performing work on the equipment inside the housing 101, the swing handle 103 is rotated to open the door 102 in an unlocked state, and then the swing handle 102 is simply rotated to the locked position at the desired opening angle, whereby the lower rod 24 moves downward in conjunction with the locking mechanism 20, and the rotating plate portion 36 is rotated and displaced around the one side 36 as a rotation center so that the entire surface of the rotating plate 36 substantially abuts against the underside of the second guide plate 34. This rotational displacement pushes up the fitting portion 41 of the stopper pin 38 and fits into the fitting hole F of the second guide plate 34, fixing the door 102 in the open state at that opening angle.

[0074] After the work is completed, simply by rotating the swing handle 103 to the unlocked position, the lower rod 24 moves upward, and the rotating plate portion 36 is rotated around one side 36a as the rotation center in a direction away from the lower surface of the second guide plate 34. This releases the pushing-up state of the fitting portion 41 by the rotating plate member 36 and disengages it from the fitting hole F, thereby also releasing the restriction on the movement of the other end 40 of the stopper pin 38, and the door 102 can be closed.

[0075] As described above, according to the door stopper mechanism 31 of this embodiment, the worker can fix the door 102 in the open state before starting work and release the fixation after work is completed simply by rotating the swing handle 103 while standing, so that the worker can move on to work on the next housing 101 efficiently and without any burden.

[0076] Therefore, even when a large number of cabinets 101 to be worked on are installed side by side, the work of fixing and releasing the open state of each door 102 is simple and can be completed in a short time, thereby improving the efficiency of the entire work process. [Industrial Applicability]

[0077] The door stopper mechanism of the present invention can be applied not only to the doors of cubicle-type high-voltage power receiving equipment, but also to the doors of various other equipment that require the door to be fixed in the open position, as long as it is equipped with a rod latch-type locking mechanism. [Explanation of symbols]

[0078] 1,31: Door stopper mechanism 2,32: First guide plate 3,33:Slit hole 4, 4', 34: Second guide plate 5,5',35: Long hole F: Mating hole 6,36: Rotating plate 6a: Area on the hanging side (of the rotating plate) 6c: Rotation axis (of the rotating plate) 6s: Inclined part (of the rotating plate) 6b: (Pivot plate part) Door edge area 37,:Connection part H,H': Through hole 8,38:Stopper pin 9,39: One end of (the stopper pin) 10,40: (Stopper pin) other end 11, 41: Fitting part 20: Locking mechanism 21: Latch plate 22: Latch 23: Upper rod 24: Lower rod 25: Upper push member 26: Lower push member 100: Cubicle-type high-voltage power receiving equipment 101: Cabinet 102: Door 103: Swing handle 111: Upper frame 112: Bottom frame 113: Vertical frame

Claims

1. A door stopper mechanism for releasably fixing a single swing door that closes an opening of a housing in an open state, The door is provided with a rod latch type locking mechanism, The rod latch type locking mechanism includes an upper rod and a lower rod that are respectively moved up and down in the distal direction on the back side of the door in conjunction with the rotation of a swing handle on the front side of the door when the door is in a closed state, so that their respective tip ends are engaged with the inside edges of the upper and lower frames of the opening, thereby restricting movement of the door in the opening direction; The door stopper mechanism includes: The door frame is secured to the rear lower portion of the door frame across the horizontal width direction, and has a slit hole formed in an area near the door frame's hanging point that extends along the horizontal width direction. a second guide plate that is fixed to the underside of the first guide plate and has a long hole drilled therein over an area that overlaps with the slit hole; a stopper pin having a generally U-shape, one end of which is attached to the lower frame so as to be rotatable around an axis, and the other end of which is inserted movably into the slit hole and the elongated hole; a rotating plate portion further installed below the second guide plate, the stopper pin has a fitting portion integrally formed at a lower end of the other end portion that is inserted through the slit hole and the elongated hole, the fitting portion having an outer diameter larger than the outer diameter of the other end portion, the rotating plate portion is connected to a lower portion of the lower rod, and is rotated in conjunction with the up and down movement of the lower rod, so that at least a portion of the rotating plate portion is displaced in a direction toward and away from the lower surface of the second guide plate, and the displacement in the direction toward the lower surface pushes up the fitting portion, The door stopper mechanism is characterized in that the second guide plate has a plurality of fitting holes formed as enlarged diameter portions of the elongated hole along the longitudinal direction of the elongated hole, which fit into the fitting portion pushed up by the rotating plate portion to restrict the other end of the stopper pin from moving within the slit hole and the elongated hole.

2. The door stopper mechanism according to claim 1, characterized in that the pivoting plate portion is connected to the lower portion of the lower rod on the door edge side so as to pivotally displace to a state in which the engaging portion is pushed up by the downward movement of the lower rod.

3. The door stopper mechanism described in claim 2, characterized in that the rotating plate portion is supported below the second guide plate so that it can rotate in a seesaw manner around a center near its longitudinal center, and as the lower rod moves downward, the end portion on the door tip side is forced downward, causing the area near the hanging point to approach the underside of the second guide plate and push up the fitting portion to fit into one of the multiple fitting holes.

4. The door stopper mechanism of claim 2, wherein one longitudinal side of the pivot plate portion is pivotally supported at both ends so that it can rotate horizontally in the door direction, and the one longitudinal side is forced downward as the lower rod moves downward, thereby bringing the pivot plate portion closer to the second guide plate entirely, pushing up the fitting portion and fitting it into one of the multiple fitting holes.

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