JP6139993B2 - Door fixing device - Google Patents

Description

  The present invention relates to a door fixing device preferably used for fixing a switchgear door, for example, and more particularly to a door fixing device having an improved door locking mechanism with respect to a housing.

  The switchgear may require seismic performance depending on where it is applied. The switchgear housing, which requires such seismic performance, has a structure in which square steel pipes and angle members are joined together by welding, so it is extremely rigid and has a higher natural frequency than ordinary switchgear. There are features. Because of such a rigid structure, there are many cases in which the opening of the housing that engages with the door of the switchgear is a structural weak part. For this reason, measures are taken to connect the door and the opening of the housing to contribute to the rigidity of the switchgear main body. For example, a bolt-shaped fixing bracket with a female screw hole in the center is used, and the threaded portion is penetrated into a hole with a diameter larger than that of the screw portion provided on the frame side. In addition, there is one in which a bolt is screwed into the screw hole from the front side of the door to be provided on the fixing bracket itself (see, for example, Patent Document 1). Also, a box for storing the storage device, an openable / closable door provided at the opening of the box, a hinge provided on one side of the door, and a rotatable handle provided on the other side of the door A door closing device for a metal closed type switchgear having a handle, wherein a plurality of links are connected to a handle, and one end of each of the links is locked to an upper locking bracket fixed to a box. The upper fixing rods are connected to each other, and the other ends of the plurality of links are respectively connected to the lower fixing rods locked to the lower locking brackets fixed to the box (see, for example, Patent Document 2). ).

Japanese Patent Laid-Open No. 4-44582 (first page, FIG. 1) Japanese Patent Laying-Open No. 2011-223780 (first page, FIG. 1)

  In the conventional technique such as Patent Document 1, the bolt can be fastened only at one place for one operation. In a general structure in which the bolt is fastened at a plurality of points, the bolt fastening work is complicated. It was efficiency. Moreover, in the technique like the conventional patent document 2, the engagement of several places can be locked simultaneously by rotating the handle | steering-wheel attached to the door. However, since the link mechanism is stretched over the entire door, there is a problem in that it is difficult to attach the control device to the door due to space restrictions when attaching a control device such as a relay, switch, or lamp to the door. there were.

  The present invention has been made to solve the above-described problems. The door and the housing can be bolted at a plurality of points by one operation, and a relay, a switch, a lamp, or the like is used for the door. The purpose is to obtain a door fixing device to which a control device or the like can be attached.

  In the door fixing device according to the present invention, a plurality of fastening bodies composed of nuts or bolts that are non-rotatably installed at predetermined positions in the opening of the housing, and a threaded portion that can be screwed to the fastening body are formed. A plurality of fastening members that are rotatably provided at positions facing the fastening body in the door formed so as to close the opening, and fasten the fastening body to the fastening body; and A transmission device provided so that a plurality of fastening members are rotated in conjunction with each other, and a drive unit that applies a driving force to the transmission device.

  In the present invention, since a plurality of bolts can be fastened by one operation, the burden during the door fixing work can be reduced. Moreover, since the freedom degree of arrangement | positioning of an operation part and a transmission mechanism is high, a space can be provided in the desired location of a door and control equipment etc. can be attached.

It is a block diagram which shows notionally the principal part of the fixing device of the door by Embodiment 1 of this invention, and is the figure which looked at the state when attaching a door to the opening part of a housing | casing from the side surface side. The conceptual diagram which saw through the drive mechanism provided in the door shown by FIG. 1 from the front side. The front view which shows the fastening body shown by FIG. The figure which shows the modification of the drive mechanism shown by FIG. It is the block diagram which shows notionally the principal part of the fixing device of the door by Embodiment 2 of this invention, and is the figure which looked at the state when attaching a door to the opening part of a housing | casing from the side surface side. The conceptual diagram which saw through the drive mechanism provided in the door shown by FIG. 5 from the front side. The front view which shows the fastening body shown by FIG. It is a block diagram which shows notionally the principal part of the fixing device of the door by Embodiment 3 of this invention, and is the figure which looked at the state when attaching a door to the opening part of a housing | casing from the side surface side. The conceptual diagram which saw through the drive mechanism provided in the door shown by FIG. 8 from the front side.

Embodiment 1 FIG.
Hereinafter, the door fixing device according to Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram conceptually showing a main part of a door fixing device according to Embodiment 1 of the present invention, and is a view of a state when a door is mounted on an opening of a housing as viewed from the side. . 2 is a conceptual view of the drive mechanism provided on the door shown in FIG. 1 seen through from the front side, FIG. 3 is a front view showing the fastening body shown in FIG. 1, and FIG. 4 is shown in FIG. It is a figure which shows the modification of a drive mechanism. In the figure, the switch gear has an opening 1a on the front side (the right side in FIG. 1), and houses a circuit breaker such as a vacuum circuit breaker or an electric device such as a bus bar, which is not shown inside. 1 and the door 2 provided so that the opening part 1a may be opened and closed.

  Fastening bodies 3A using positive nuts 32A are installed at the four corners of the peripheral edge of the opening 1a. In this document, for the sake of convenience, a nut having a “normal screw” in which a screw to be fastened when rotated clockwise (rightward) when viewed from the head side is referred to as a “normal nut” and vice versa. For the sake of convenience, a nut having a “reverse screw” in which the screw is screwed is referred to as a “reverse nut”. As shown in FIGS. 1 and 3, the fastening body 3A has a through-hole (not shown) that allows a positive threaded portion 4a of a fastening member 4A screwed to a positive nut 32A to be freely inserted. The holding bracket 31 is made of a rectangular plate member, and the positive nut 32A is welded and fixed coaxially with the through hole of the holding bracket 31.

  A through hole 31a is provided inside each corner of the holding metal fitting 31, and a pin 33 having a top portion 33a erected in parallel to the peripheral edge of the opening 1a passes through each hole 31a. The pin 33 can be moved by a predetermined dimension in the axial direction of the fastening body 3A, and is restrained and held in the rotational direction of the fastening body 3A. The diameter of the hole 31a through which the pin 33 passes is larger than the diameter of the pin 33 and smaller than the diameter of the top portion 33a of the pin 33. The top portion 33a of the pin 33 has a function as a stopper in the axial direction of the fastening body 3A, and the fastening body 3A is substantially non-rotatably installed with a slight allowance in the rotational direction. In addition, although the fastening body 3A is shown in a mode in which the positive nut 32A is welded to the holding metal 31, the screw 31 may be screwed into the holding metal 31 itself to have the function of a nut, and the normal nut 32A may be omitted. .

  On the other hand, a plurality of fastening members 4A provided with a positive thread portion 4a similar to a shaft portion of a bolt screwed into a positive nut 32A of the fastening body 3A is rotatable at a position facing the fastening body 3A in the door 2. Is provided. As for each fastening member 4A, the base side (right side in FIG. 1) is rotatably held by the door 2 via a bearing member (not shown). A pulley 51A constituting a transmission device 5 for rotating the plurality of fastening members 4A in synchronization with each other is fixed coaxially. Further, as shown in FIGS. 1 and 2, a drive pulley 62 provided with a handle 61 constituting the drive unit 6 is provided at the center lower portion of the door 2, and symmetrically disposed on the left and right upper portions of the drive pulley 62. A pair of tension pulleys 52 are provided, and loop belts 53 are wound around the four pulleys 51A, the drive pulley 62, and the tension pulleys 52 as shown in FIG.

  The transmission device 5 includes a pulley 51 </ b> A, a tension wheel 52, and a belt 53. The drive unit 6 is configured using a handle 61 and a drive pulley 62. In this example, the fastening body 3A is provided with a movable margin in the circumferential direction in addition to the axial direction of the pin 33 with respect to the four pins 33 erected on the housing 1, and therefore the fastening member 4A The axial center of the positive nut 32 </ b> A is configured to easily fit. In addition, the starting positions of the four fastening members 4A in the circumferential direction of the thread are aligned in advance so as to be in the same direction in order to make the threading uniform. Similarly, the angles of the positive nuts 32A are aligned in advance so as to be in the same direction. Examples of the transmission device 5 include a chain in addition to the belt, but are not limited thereto. When a belt is used, the engaging surfaces of both the pulley 51A and the driving pulley 62 are formed with unevenness that meshes with each other, similar to the timing belt in the internal combustion engine of an automobile, so that the belt rotates reliably and synchronously. Also good.

  Next, the operation of the first embodiment configured as described above will be described. First, when the door 2 is fixed to the opening 1a of the housing 1, the door 2 is brought close to the opening 1a as shown by the arrow in FIG. 1, and the front end of the fastening member 4A is set to the axial center of the opposing positive nut 32A. By pushing so as to be coaxial, and rotating the handle 61 clockwise, the drive pulley 62 coupled to the handle 61 rotates clockwise. At the same time, the loop belt 53 constituting the transmission device 5 wound around the drive pulley 62 is moved, so that the drive pulley 62, the four pulleys 51A, and the tension pulley 52 are indicated by the bold lines shown in FIG. The positive nut 32A is screwed into the fastening member 4A made of a positive screw that is rotated in the direction of the arrow and is fixed to the pulley 51A, and the four fastening bodies 3A simultaneously move in the direction of the top of the pin 33, Fastening is complete when the top is reached.

When removing the door 2 fixed to the opening 1a by the above operation, the drive pulley 62 coupled to the handle 61 is rotated counterclockwise by rotating the handle 61 counterclockwise. When the belt 53 constituting the transmission device 5 is moved in the opposite direction, the four pulleys 51A rotate counterclockwise and the four fastening members 4A made of bolts are simultaneously loosened. Thus, the fixing of the door 2 and the switchgear housing 1 is released.
The driving pulley 62 and the tensioning wheel 52 are arranged close to one side of the vertical side of the door 2 as shown in the modification of FIG. Space may be secured.

  As described above, according to the first embodiment, since the fastening member 4A composed of a plurality of bolts can be fastened simultaneously by one operation by rotating the handle 61, the burden of attaching and detaching the door 2 is reduced. Workability can be improved. In addition, the installation position of the tensioning wheel 52 that constitutes the driving unit 6 and the transmission device 5 that are the operation units has a high degree of freedom, and for example, as shown in FIG. For this reason, since a space can be provided at a desired position of the door 2, there is almost no restriction on the attachment of the control device to the door 2, and the trouble of the attachment can be avoided.

  In the first embodiment, the example of four fastening portions using bolts is shown, but the number of fastening portions can be arbitrarily changed by further combining the pulley 51A and the tensioning vehicle 52. Further, when the engaging surfaces of the belt 53, the pulley 51A, and the driving pulley 62 are provided with the concave and convex portions that engage with each other, the driving system can be prevented from slipping, so that the door 2 can be fastened and fixed more reliably.

Embodiment 2. FIG.
FIG. 5 is a configuration diagram conceptually showing a main part of the door fixing device according to the second embodiment of the present invention, and is a view of the state when the door is mounted on the opening of the housing as viewed from the side. . 6 is a conceptual view of the drive mechanism provided on the door shown in FIG. 5 as seen through from the front side, and FIG. 7 is a front view showing the fastening body shown in FIG. In the drawing, the fastening body 3B is configured by using a reverse nut 32B here. On the other hand, a reverse screw portion 4b is provided on a fastening member 4B in the shape of a shaft portion of a bolt that is fixed coaxially to the pulley 51B of the door 2 and screwed into the reverse nut 32B of the fastening body 3B. Then, on the driving pulley 62 driven by the handle 61, a loop belt 53 constituting the transmission mechanism 5 is formed on the pulley 51B at the four corners without using a tensioning pulley as shown in FIG. Sequentially engaged and wound. In addition, the arrow of the thick line of FIG. 6 has shown the rotation direction at the time of fastening the fastening member 4B to the fastening body 3B. Since other configurations including aligning the starting positions in the circumferential direction of the screw threads with each other are the same as those in the first embodiment, description thereof will be omitted.

  In the second embodiment configured as described above, when the door 2 is fastened and fixed to the opening 1a of the housing 1 with a bolt, the door 2 is moved to the opening 1a in the direction of the arrow in FIG. The driving pulley 62 coupled to the handle 61 is rotated clockwise by approaching and pressing the end of the fastening member 4B having the reverse screw portion 4b against the opposite reverse nut 32B and rotating the handle 61 clockwise. To do. The rotation is transmitted to the belt 53 constituting the transmission device 5, and the pulleys 51 </ b> B at the four corners engaged with the belt 53 are interlocked and rotated simultaneously counterclockwise as shown in FIG. 6. Since the rotation of the pulley 51B is transmitted to the fastening member 4B, the reverse screw portion 4b rotates in a counterclockwise direction, so that the reverse nut 32B and the fastening member 4B of the fastening body 3B are fastened at the same time. Is done.

  When the door 2 fixed to the opening 1a by the above operation is removed by loosening the fastening member 4B, the transmission device 5 coupled to the handle 61 is rotated by rotating the handle 61 counterclockwise. The four belts 51B are moved in the opposite direction, and the four pulleys 51B are simultaneously rotated clockwise to loosen the four fastening members 4B made of bolts composed of reverse screws at the same time. The fixing of the door 2 and the switchgear housing 1 is released.

  As described above, according to the second embodiment, since a plurality of bolts can be fastened simultaneously by one operation, the burden of attaching / detaching the door 2 is reduced, and workability can be improved. . Moreover, since the installation position of the drive unit 6 and the tension wheel 52 has a high degree of freedom and a space can be secured at a desired position of the door 2, there are almost no restrictions when the control device is attached to the door 2. Further, as compared with the first embodiment, since the tension wheel 52 is not used, there is a feature that the number of parts can be reduced.

Embodiment 3 FIG.
FIG. 8 is a block diagram conceptually showing the main part of the door fixing device according to Embodiment 3 of the present invention, and is a view of the state when the door is mounted on the opening of the housing as viewed from the side. . FIG. 9 is a conceptual view of the drive mechanism provided on the door shown in FIG. 8 as seen through from the front side. In the third embodiment, the door 2 is fastened to the four corners of the housing 1 simultaneously with a positive screw and a positive nut, and the left and right intermediate portions in the longitudinal direction (vertical direction) of the door 2 are added. A part to be fastened and fixed with a reverse screw and a reverse nut is added, and a total of six screw fastenings are simultaneously performed by one operation. In the figure, in the opening 1a of the casing 1 constituting the switchgear main body, in addition to the fastening body 3A using the regular nuts 32A at the four corners, reverse nuts 32B are used at the left and right intermediate portions of the opening 1a. A configured fastening body 3B is provided.

  The fastening body 3B can be moved by a predetermined dimension in the axial direction by a pin 33 having a top 33a, and is slightly in the rotational direction of the fastening body 3B, as in the fixing method of the fastening body 3A using the positive nut 32A. It is restrained and held with a movable allowance. On the other hand, at a position corresponding to the fastening body 3B of the door 2, a fastening member 4B provided with a reverse screw portion 4b similar to a shaft portion of a bolt screwed into the nut 32B of the fastening body 3B is rotatably provided. Further, a pulley 51B constituting the transmission device 5 is coaxially fixed to the outer peripheral portion on the base side of the fastening member 4B. A fastening member 4A and a pulley 51A are rotatably provided at positions corresponding to the fastening body 3A.

  A drive pulley 62 having a handle 61 constituting the drive unit 6 and a pair of tension wheels 52 disposed symmetrically at the upper left and right sides of the drive pulley 62 are provided at the lower center of the door 2. A loop-shaped belt 53 is provided on the pulley 51B at the four corners for rotating the fastening body 3A made of screws and the pulley 51B at the left and right two places for rotating the fastening body 3B made of reverse screws, the driving pulley 62 and the tension pulley 52. Is wound as shown in FIG. When the handle 61 is rotated in the clockwise direction, the fastening member 4A made of a normal screw is configured to rotate in the clockwise direction, and the fastening member 4B made of a reverse screw is rotated in the counterclockwise direction. In addition, the starting positions of the screw threads of the normal screw portion and the reverse screw portion are aligned in the same direction in order to make the threading uniform. Since other configurations are the same as those of the first embodiment, description thereof is omitted.

  In the third embodiment configured as described above, when the door 2 is fastened and fixed to the opening 1a of the switchgear with a bolt, the door 2 is moved closer to the opening 1a in the direction of the arrow in FIG. When the opposing fastening body 3A and the fastening member 4A, and the fastening body 3B and the fastening member 4B are pressed against each other, the handle 61 is rotated clockwise and the drive pulley 62 is rotated clockwise, the rotation is transmitted to the transmission device 5. The pulleys 51A at the four corners engaged with the belt 53 are rotated together in a clockwise direction as shown in FIG. 9, and the pulley 51B in the middle portion in the longitudinal direction (vertical direction) is counteracted. Simultaneously rotate clockwise. The clockwise rotation of the driving pulley 62 is transmitted to the fastening member 4A and the fastening member 4B as the rotation in the fastening direction, respectively, so that the drive pulley 62 is screwed to the fastening body 3A and the fastening body 3B corresponding to each other. By further rotating from there, the fastening body 3A and the fastening body 3B are moved to the tops of the respective pins 33 and fastened. Eventually, the fastening body 3A and the fastening member 4A, and the fastening body 3B and the fastening member 4B are simultaneously fastened together.

  When removing the door 2 fixed to the opening 1a, the belt 53 constituting the transmission device 5 coupled to the handle 61 is reverse to the above by rotating the handle 61 counterclockwise. The four pulleys 51A at the four corners of the six pulleys simultaneously rotate counterclockwise and the four fastening members 4A made of bolts composed of positive screws are simultaneously loosened. The intermediate pulley 51B in the vertical direction coupled with the fastening member 4B using the reverse screw is rotated clockwise to rotate the reverse screw portion 4B clockwise. Therefore, the pulley 51B with the reverse nut 32B is connected to the fastening body 3B. The fastening is released simultaneously with the fastening member 4A having a regular screw.

  As described above, according to the third embodiment, even when both a normal screw and a reverse screw are used, a plurality of bolt fastenings can be performed in conjunction with one operation, thereby reducing the work load. Workability is improved. In addition, it is possible to arbitrarily change the arrangement of the operation mechanism and the transmission mechanism, and it is possible to provide a space at an arbitrary position of the door of the switch gear, so that it is possible to eliminate the restriction on the installation of the control device. . Moreover, even if the number of fastening points using bolts is increased, it is not necessary to increase the number of tension vehicles, and an effect such as a simple configuration can be obtained.

  It should be noted that within the scope of the present invention, a part or all of each embodiment can be freely combined, or each embodiment can be appropriately modified or omitted. For example, the fastening body 3A and the fastening body 3B are constituted by nuts, and the fastening member 4A and the fastening member 4B are constituted by bolt shafts. However, the relationship between the nut and the bolt may be reversed. In addition, the drive pulley 62 is provided as the drive unit 6 separately from the pulley 51A and the pulley 51B. It may be configured so that the handle 61 can be mounted, and the pulley 51A or the pulley 51B can also serve as the driving pulley. In that case, the drive pulley 62 can be omitted.

  Furthermore, since the door 2 is increased in mass by mounting the transmission device 5 such as the pulley 51A, the drive unit 6, and the like, for example, either the left or right frame constituting the opening 1a of the housing 1 is improved in order to improve workability. You may comprise so that a hinge may be provided in a part and the door 2 may be hold | maintained so that rotation is possible. In this case, the hinge is preferably structured so as to allow linear movement in the axial direction of the door 2 when the fastening member 4A is fastened to the fastening body 3A. Further, a fastening member 3A and a fastening member that are opposed to each other when the door 2 is temporarily placed on the support member are provided in the lower front portion of the opening of the housing in a detachable manner. Appropriate devices can be added, such as a configuration in which the heights of the 4A axes coincide with each other. Further, the switch gear may be changed to other devices.

  DESCRIPTION OF SYMBOLS 1 Housing | casing, 1a opening part, 2 door, 3A fastening body, 3B fastening body, 31 holding | maintenance metal fitting, 31a hole, 32A positive nut, 32B reverse nut, 33 pin, 33a head top part, 4A fastening member, 4a positive thread part, 4B fastening member, 4b reverse screw part, 5 transmission device, 51A pulley, 51B pulley, 52 tensioning wheel, 53 belt, 6 drive part, 61 handle, 62 drive pulley.

Claims (6)

  A plurality of fastening bodies made of nuts or bolts that are non-rotatably installed at predetermined positions in the opening of the housing and a threaded portion that can be screwed into the fastening body are formed, and are formed so as to close the opening. A plurality of fastening members that are rotatably provided at positions facing the fastening body in the door and fasten the fastening body to the fastening body, and the plurality of fastening members are rotated in conjunction with each other. A door fixing device, comprising: a transmission device provided in such a manner; and a drive unit that applies a driving force to the transmission device.   2. The door fixing device according to claim 1, wherein the fastening body includes a nut locked to the opening so as to be movable in a predetermined dimension in an axial direction of the fastening member.   3. The transmission device according to claim 1, wherein the transmission device includes a pulley fixed coaxially to the plurality of fastening members, and a loop belt wound around the pulley so as to sequentially connect the pulley. The door fixing device described in 1.   4. The door fixing device according to claim 3, wherein the engaging surface between the pulley and the belt is formed with unevenness that meshes with each other.   The drive unit rotates any one of the plurality of pulleys or a drive pulley provided separately from the plurality of pulleys and wound with the belt from the front side of the door. The door fixing device according to claim 3 or 4, wherein a drive handle provided is used.   The door fixing device according to any one of claims 1 to 5, wherein a normal screw is used for a part of the plurality of fastening bodies, and a reverse screw is used for the remaining part of the plurality of fastening bodies.

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