JP6587835B2 - Multi-point tightening lock system and explosion-proof door using the same - Google Patents

Description

  The present invention relates to a multi-point tightening lock system used for a door that is required to be securely held by a housing such as an explosion-proof door that is in contact with a large pressure due to an increase in pressure inside the housing, and an explosion-proof using the same. Regarding doors.

Generally, when a high voltage distribution box or the like cuts off (short-circuits) a high voltage inside the housing, its electrical energy gathers instantaneously, an arc is released, and the released arc becomes a state of explosion, The inside of the housing may become high pressure and the door may be blown away. The door of this type of housing has an explosion-proof structure in preparation for an increase in internal pressure when such a short-circuit arc occurs. Explosion-proof doors have been devised so that the doors are not damaged by internal explosions, such as by strengthening hinges and locks, and the surrounding equipment and people are not affected.
This type of explosion-proof door is described in Patent Document 1, for example. The explosion-proof door of this document 1 is connected to one side portion of a housing via a hinge member, and a locking device such as a locking metal fitting is disposed on the other side portion. Is tightly attached to the casing, and a blast when the short-circuit arc is generated prevents the damage inside the casing from being scattered outside the casing.

Utility Model Registration No. 3034496

  However, in a conventional door-tightening structure such as an explosion-proof door, the door is joined to the housing by a hinge member on one side and a locking bracket on the other side, and a small part of the entire circumference of the door Since the pressure inside the housing rises due to the occurrence of a short-circuit arc, etc. inside the housing, and a pressure of several tons is applied to the door, this is not possible with locking devices such as locking brackets. There is a problem that the door cannot be held because it cannot withstand the internal pressure.

  The present invention solves such a conventional problem, and the side portion on the rotating side of the door is fixed by engagement of the lock member and the receiving portion at a plurality of locking points, and particularly at each locking point. The engagement between the lock member and the receiving part of the housing is sufficiently resistant to the force in the direction of pushing the door from the inside of the housing to the outside. Even when the pressure rises and several tons of pressure is applied to the door, the multi-point tightening lock system can maintain the door securely by maintaining the engagement of each member at each locking point. And providing an explosion-proof door using the same.

In order to achieve the above object, the present invention provides:
At the rear of the door along the side of the rotation-side locking member is arranged in a plurality of mounting 箇 plant, the in conjunction with the operation of the handle attached to the front of the door the lock bar coupled to the locking member It is a multi-point tightening lock system of a type that engages and disengages each lock member with respect to a receiving part on the housing side by driving forward and backward along the side part on the back side of the door,
Each locking member is
A mounting base made of a material having high rigidity, and a fixing base that is fixed to the mounting portion on the back surface of the door, and a support portion that has a shaft insertion portion that extends from the fixing portion and penetrates between both side surfaces;
A rotation fulcrum portion made of a material having high rigidity and formed on the base end side and having a shaft insertion portion communicating with the shaft insertion portion of the mounting base, and a cross-sectional view in a side view from the rotation fulcrum portion toward the distal end side A hook portion that is formed in an L-shape and has a substantially straight flat surface with a surface facing the rotation fulcrum portion side of the substantially L-shape as a lock engagement surface, and the rotation fulcrum portion and the hook Adjacent to the pivot fulcrum part and facing the lock engaging surface of the hook part through a groove having a substantially V-shaped or substantially U-shaped cross section in a side view, A hook plate having an operating fulcrum portion having a shaft insertion portion parallel to the shaft insertion portion of the rotation fulcrum portion;
With
In each of the mounting bases, the fixing portion is fixed to each of the mounting locations on the back surface of the door, and the support portion protrudes toward the rear of the door at a substantially right angle to the back surface of the door,
Each hook plate is rotatably attached to each attachment base through a connecting shaft between a shaft insertion part of the rotation fulcrum part and a shaft insertion part of each attachment base, and each of the operation fulcrum parts The shaft insertion portion is operatively connected to the lock bar through a shaft protruding from the lock bar,
The receiving portion is made of a material having high rigidity, and is fixed to a housing, and extends from the fixed portion to a substantially L-shaped or substantially U-shaped cross section in plan view. A hook engaging portion having a substantially straight flat surface as a lock engaged surface, which is parallel to the housing and directed toward the housing in the letter shape,
Each receiving portion is fixed at a position corresponding to each locking member on the back surface of the door on the front surface of the housing, and the hook engaging portion is disposed in parallel with the front surface of the housing.
The lock bar is driven by the operation of the handle, and the operating fulcrum portion of each hook plate is rotated around the rotation fulcrum portion of each hook plate, whereby the hook plate The hook portion is inserted into the hook engaging portion of the receiving portion, and the lock engaging surface of each hook portion and the lock engaged surface of the hook engaging portion are connected to the operating fulcrum of the hook plate. Make contact engagement at approximately the same height position,
This is the gist.
This multi-point tightening lock system is further embodied as follows.
(1) locking member, an upper-side lock member disposed on the lower side locking member and the upper side attachment portion disposed on the lower side of the attachment points of the plurality of mounting 箇 office door, the lower side The lock member is attached to the lower mounting portion with the tip of the hook portion of the hook plate facing downward, the operating fulcrum of the hook plate of the lower lock member is pivotally supported by the lower lock bar, and the upper lock member The front end of the hook portion of the hook plate is mounted upward at the mounting position on the upper side, the operating fulcrum portion of the hook plate of the upper side locking member is pivotally supported by the upper locking bar, A handle common to the lower side lock member and the upper side lock member is attached to a position between the lower side lock member and the upper side lock member. Wherein each locking bar of the lower side and upper side is operatively linked.
(2) The handle is mounted on a mounting opening formed at a position between the lower side locking member and the upper side locking member in front of the door, and the opening communicates with the mounting opening on the upper side. A handle base having an operating lever mounting portion projecting from both sides of the door to the back side of the door through the mounting opening, and pivotally mounted on the upper side of the handle base via a first fixed pivot parallel to the front of the door. A handle lever that is mounted on the handle base so as to be able to turn up and down, and has an operating arm that can protrude to the back side of the door through the mounting opening on the upper side, and an upper end at the protruding end of the operating arm of the handle lever A first connecting link pivotally attached via a first movable pivot parallel to the first fixed pivot and having a substantially inverted L shape from the upper end to the lower end; and an upper end at the lower end of the first connection link An operation fulcrum portion that is pivotally attached via a second movable pivot that is parallel to the first fixed pivot and extends downward from the upper end, and one end at the lower end of the operation fulcrum is connected to the operation lever mounting portion of the handle base. A lower actuating lever having an actuating portion pivotally attached via a second fixed pivot parallel to the first fixed pivot and having the other end extending obliquely downward toward the rear of the door; and the first connecting link A second connection link having a lower end pivotally attached to an intermediate portion of the intermediate portion via a third movable pivot that is parallel to the first fixed pivot, and having a substantially linear shape from the lower end to the upper end; and the second connection A lower end is pivotally attached to the upper end of the link via a fourth movable pivot that is parallel to the first fixed pivot, and an upper end of the actuation fulcrum that extends upward from the lower end is connected to the upper end of the handle base. The first fixed pivot on the operating lever mounting portion; An upper operating lever pivotally mounted via a third fixed pivot and having the other end extending obliquely upward toward the rear of the door, the first fixed pivot and the second fixed A reversing spring that is interposed between the pivot and holds the handle lever in an upright state from the handle base, and holds the handle lever in a fallen state on the handle base, the lower-side operating lever, The upper side operation levers are operatively connected to the lower side lock bar and the upper side lock bar, respectively, and the lower lever side is operated by rotating the handle lever to cause the handle lever to fall on the handle base. The upper operating levers are opened in a generally C shape, the lower operating lever is driven downward, the upper operating lever is driven upward, and the lower locking lever is driven. The hook member rotates the hook plate downward to engage the hook portion with the hook engaging portion of the receiving portion from above, and the upper locking member rotates the hook plate upward. Then, the hook portion is engaged with the hook engaging portion of the receiving portion from below, and each operation on the lower side and the upper side is performed by rotating the handle to raise the handle lever on the handle base. The lever is closed in a substantially inverted C shape, and the lower operating lever is driven upward, and the upper operating lever is driven downward. The lower locking member moves the hook plate upward. The hook part is turned away from the hook engaging part of the receiving part, and the lock member on the upper side turns the hook plate downward to move the hook part to the receiving part. Hook engaging part To disengage.
(3) The handle is attached to the lower part of the front face of the handle base so as to be pivotable in the vertical direction via an axis parallel to the front face of the door, and is normally urged to turn by a spring to the front face of the handle base. A hook having a claw on the front end side that is supported at a substantially right angle and protrudes forward, and is protruded toward the rear of the handle lever on the lower rear side of the handle lever and protrudes rearward A hook receiving portion having a receiving portion engageable with the claw portion of the hook is provided at an end portion, and the handle and the hook receiving portion are elastically engaged by causing the handle lever to fall on the handle base. A lever catch for restricting the rotation of the handle lever to hold the handle lever on the handle base, and the lever base on the handle base. A cylinder lock that is attached adjacent to the key with the keyhole facing forward, and is disposed on the rear end side opposite to the keyhole of the rotor of the cylinder lock so as to be slidable in the vertical direction of the handle base. Operatively connected to the rotor of the lock via a slide guide, and by the key operation of the cylinder lock, the rotor is rotated to the locked position and is slid to a position where it does not engage with the hook of the lever catch, By holding the engagement between the hook and the hook receiving portion and turning the rotor to the unlocked position, the lever catch is slid and driven to engage with the hook, and the spring is biased by the spring. And a slide plate for releasing the engagement between the hook and the hook receiving portion. Comprising in combination a lock unit for releasing the rotation restriction of the handle lever on the handle base by Ji.

  In the present invention, one side is rotatably connected to one side of the housing via a hinge member, and the other side is tightened to the housing via a locking device. The gist of the present invention is an explosion-proof door that resists a large pressure generated inside the housing, and uses the multi-point tightening lock system as the lock device.

(1) According to the multi-point tightening locking system of the present invention, by the above configuration, the locking member having a high rigidity plurality 箇 plants rotation side portion of the door is provided, in correspondence with this housing A receiving part having high rigidity is provided on the body side, the lock bar is driven by operating the handle, and the operating fulcrum part of the hook plate of each lock member is rotated about the rotating fulcrum part of the hook plate as the rotation center. Thus, the hook portion of the hook plate is inserted into the hook engaging portion of each receiving portion on the housing side, and the lock engaging surface of the hook portion and the lock engaged surface of the hook engaging portion are substantially the same as the operating fulcrum of the hook plate. since so as to engage abutment engagement at the same height position, the sides of the rotation-side of the door is fixed by the engagement between the locking member and the receiving portion in a plurality of multiple 箇 plants, in particular the locking member at each location And the high rigidity of the receiving part and its engagement type, Realizes a pressure resistant structure that sufficiently resists the force in the direction of pushing the housing from the inside to the outside.For example, the pressure inside the housing rises due to the occurrence of a short-circuit arc inside the housing, and several tons of Even when pressure is applied, it is possible to maintain the engagement of the respective members at the respective locking points and to reliably hold the door.
(2) According to the proof爆扉of the present invention, engagement of the multi-point by using the tightening locking system, the locking member and the receiving portion sides of the rotating side of the door at a plurality of multiple 箇 plants With the high rigidity of the locking member and the receiving part at each location and the type of engagement, a pressure resistant structure that sufficiently resists the force in the direction of pushing the door from the inside of the housing to the outside is realized, for example, Even when the pressure inside the housing rises due to the occurrence of a short-circuit arc inside the housing and a pressure of several tons is applied to the door, the engagement of each member at each locking point is maintained, and the door is There is an exceptional effect unique to the present invention that it can be reliably held.

The figure which shows the multipoint fastening type lock system in one embodiment of this invention, and the explosion-proof door using the same ((a) is a front view, (b) is side sectional drawing) The figure which shows the housing | casing which applies the same multipoint tightening type lock system and an explosion-proof door using the same ((a) is a front view, (b) is a side view) The figure which shows the door body of the explosion-proof door ((a) is a rear view (b) is a side sectional view) The figure which shows the hinge member which couple | bonds the door main body and housing | casing of the explosion-proof door ((a) is a front view (b) is a top view) The figure which shows the state by which the door main body and housing | casing of the explosion-proof door were combined via the hinge member ((a) is a plane sectional view which shows the closed state of a door main body, (b) is a plane cross section which shows the open state of a door main body. (Figure) Diagram showing the multi-point tightening lock system (partially omitted side view) The figure which shows the locking member and receiving part which are used for the multi-point tightening type locking system ((a) is a front view (b) is a side view (c) is a plan view) The figure which shows especially the attachment base of the locking member used for the same multipoint tightening type locking system ((a) is a plan view (b) is a front view (c) is a side view) Figure showing the hook plate of the lock member used in the multi-point tightening lock system (side view) The figure which shows the attachment state of the attachment base and the hook plate especially of the lock member which is used for the same multi-point tightening lock system (the perspective view) The figure which shows the receiving part used for the multi-point tightening type lock system ((a) is a plan view (b) is a side view (c) is a front view) The figure which shows the handle | steering-wheel used for the same multipoint fastening type lock system ((a) is a top view (b) is side sectional drawing) Diagram showing the handle used in the multi-point tightening lock system (rear view) The figure which shows the operation example of the multi-point tightening type lock system ((a) is a plan view showing the state where the hook plate and the receiving part of the locking member are engaged) (b) is the hook plate and the receiving part of the locking member The side view (c) showing the engaged state is a side view showing the state where the engagement between the hook plate of the lock member and the receiving part is released)

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 shows a multi-point tightening lock system and an explosion-proof door using the same.
As shown in FIG. 1, the explosion-proof door D is configured such that the door body d is made of a material having rigidity such as a steel plate, and one side portion of the housing B is interposed via a plurality of (in this case, four) hinge members 1. The side part of the other side is pivotally connected to the case B by a multi-point tightening lock system S used as a locking device. The structure resists the large pressure generated.
In this case, as shown in FIG. 2, the casing B is formed in a box shape that is vertically long as a whole, and the front face is made up of an upper frame f1, left and right side frames f2, f3, and a lower frame f4 having a predetermined width. The extension frames (upper extension frame f5, left and right extension frames f6, f7, and lower extension frame f8) having a predetermined length are attached to the front from the inner edge of each of the frames f1, f2, f3, and f4. An opening surrounded by the extension frames f5, f6, f7, and f8 is formed on the front surface.

  As shown in FIG. 3, the door body d covers the front surface of the housing B with a rigid material such as a steel plate, and can include the extension frames f5, f6, f7, and f8 on the front surface. , Formed in a thin box shape with the back surface open, and has a front plate p1, an upper plate p2, a left side plate p3, a right side plate p4, and a lower plate p5.

As shown in FIG. 4, each hinge member 1 is made of a rigid material such as steel, and includes a pair of attachment bases 11, a hinge body 12, a hinge pin 13, and a pair of snap pins 14.
In this case, each of the pair of mounting bases 11 is formed in a substantially L-shaped longitudinal section as a whole, has a substantially rectangular mounting portion 111 having a mounting bolt insertion portion, and extends at right angles from one end of the mounting portion 111, and the hinge pin insertion portion And a substantially semi-elliptical receiving portion 113. The hinge body 12 is formed in a substantially U-shaped cross section and has a vertically long rectangular mounting portion 121 having a mounting bolt insertion portion in order from one end side, a vertically long rectangular intermediate portion 122, and a vertically long rectangular support. The end portion of the support portion 123 is wound in a substantially cylindrical shape to form a hinge pin insertion portion 124. The hinge pin 13 is a pin that is slightly smaller in diameter than the hinge pin insertion portion 124 of the hinge body 12 and slightly longer than the length of the hinge pin insertion portion 124, and has snap pin insertion portions at upper and lower ends. Each of the pair of snap pins 14 is an arc portion retaining type.
Thus, each hinge body 12 is attached by attaching the mounting portion 121 to one side portion of the front surface of the housing B, in this case, to each mounting portion of the right side frame f3 of the front surface by the mounting bolt b1. The hinge pin insertion portion 124 is disposed on the top. Each of the pair of mounting bases 11 is fixedly attached to one side surface of the door body d with the receiving portion 113 on the lower side, in this case, the upper portion of each mounting portion of the right side plate p4 by mounting bolts b2. The receiving portion 113 is disposed on the front side of the mounting portion 111, and the other is the mounting bolt on one side of the door body d with the receiving portion 113 on the upper side, in this case, on the lower side of each mounting portion of the right side plate p4. It is fixedly attached by b <b> 2 and the receiving portion 113 is arranged on the front side of the attaching portion 111. Then, the hinge pin insertion portions of the mounting bases 11 on the door body d side are aligned with the upper and lower sides of the hinge pin insertion portions 124 of the hinge bodies 12 on the housing B side, and the hinge pins 13 are inserted into these hinge pin insertion portions, The snap pins 14 are passed through the snap pin insertion portions above and below the hinge pins 13 to assemble the hinge members 1. Via the hinge member 1, the door body d is rotatably connected to the front surface of the housing B (see FIG. 5).

Multipoint tightening locking system S, as shown in FIG. 6, the locking member 2 to a plurality of mounting 箇 stations along the other side of the rotation-side at the back of the door body d is disposed door body d The lock bar 3 connected to each lock member 2 is driven forward and backward along the side of the back surface of the door body d in conjunction with the operation of the handle 4 attached to the front surface of the door. It is in the form of engaging and disengaging with respect to each receiving part 5 on the B side.

As shown in FIG. 7, each lock member 2 includes a mounting base 21 and a hook plate 22. As shown in FIG. 8, the mounting base 21 is formed as a rigid body using a material having high rigidity such as a steel material, and is fixed to the mounting portion on the other side of the back surface of the door body d, and the fixing portion 211. And a support portion 213 having a shaft insertion portion 212 extending between the left and right side surfaces. In this case, the mounting base 21 is formed in a substantially L-shaped cross section, and includes a substantially rectangular fixing part 211 having a mounting bolt insertion part and a substantially triangular support part 213 having a shaft insertion part 212. As shown in FIG. 9, the hook plate 22 is formed as a rigid body made of a material having high rigidity such as a steel material, is formed on the base end side, penetrates between the left and right side surfaces, and communicates with the shaft insertion portion 212 of the mounting base 21. A rotation fulcrum part 221 having a shaft insertion part 220 to be formed is formed in a substantially L-shaped cross-section in a side view from the rotation fulcrum part 221 toward the distal end side. The hook portion 222 having a substantially straight flat surface as the lock engagement surface R1 and the rotation fulcrum portion 221 and the hook portion 222 adjacent to the rotation fulcrum portion 221 and the hook portion 222 are formed to face via a side view generally V-shaped section or groove 223 of the generally U-shaped with respect to the locking engagement surface R1, operating with a shaft insertion portion 224 parallel with the shaft insertion portion 220 of the rotating support part 221 Has fulcrum 225 That. In this case, as shown in FIG. 9, when the hook plate 222 is placed on a horizontal plane so that the hook portion 222 is substantially L-shaped, the lock engagement surface R1 of the hook portion 222 extends in the vertical direction, and the operating fulcrum portion The shaft insertion portion 224 is positioned obliquely above the shaft insertion portion 220 of the rotation fulcrum portion 221 and is disposed to face the lock engagement surface R1 of the hook portion 222 at substantially the same height.
Thus, as shown in FIGS. 7 and 10, each mounting base 21 has a fixing portion 211 fixed to each mounting portion on the other side portion of the back surface of the door body d, in this case, the other side portion of the back surface of the front plate p1. Then, the support portion 213 protrudes toward the rear side of the door body d at a substantially right angle with respect to the back surface of the door body d, and each hook plate 22 has a rotation fulcrum portion 221 as shown in FIGS. The shaft insertion portion 220 of each mounting base 21 and the shaft insertion portion 212 of each mounting base 21 are rotatably attached to each mounting base 21 through the connecting shaft 23, and the lock bar 3 is attached to the shaft insertion portion 224 of each operating fulcrum 225. It is operatively connected to the lock bar 3 through a shaft 31 protruding from the shaft.

As shown in FIG. 11, the receiving portion 5 is formed as a rigid body from a material having high rigidity such as a steel material, and is fixed to the housing B, and a substantially L-shaped cross section in plan view from one end of the fixing portion 51. Of the substantially L-shaped, parallel to the fixed portion 51 (at the time of mounting) and directed to the housing B (front side) side as a lock engaged surface R2, the hook engagement is a substantially straight flat surface. A joint portion 52 is provided. In this case, the receiving portion 5 is formed of an elongated rectangular steel plate in a substantially Z shape, a mounting bolt insertion portion is formed in a flat portion at one end to form a fixing portion 51, and a flat portion at the other end is a hook engaging portion 52. Make.
As shown in FIG. 7, in each receiving portion 5, the fixing portion 51 corresponds to the other side portion of the front surface of the housing B, in this case, the left side frame f <b> 2 on the front surface and each locking member 2 on the back surface of the door body d. The hook engaging portion 52 is arranged in parallel with the front surface of the housing B, and is fixed to the position by the mounting bolt b3.

  In this way, the multi-point tightening lock system S (see FIG. 6) drives the lock bar 3 by operating the handle 4 to rotate the operating fulcrum 225 of each hook plate 22. By rotating around the fulcrum part 221 as the center of rotation, the hook part 222 of each hook plate 22 is inserted into the hook engaging part 52 of each receiving part 5, and the lock engaging surface R1 of the hook part 222 and the hook The lock engaged surface R2 of the engaging portion 52 is brought into contact engagement with the operating fulcrum portion 225 of the hook plate 22 at substantially the same height position.

Further, in the multi-point fastening locking system S, as shown in FIG. 6, a plurality of lock members 2, among the plurality of mounting 箇 office door body d, the lower side is disposed on the mounting portion of the lower side A lock member D2 and an upper side lock member U2 disposed at an attachment position on the upper side, and the lock bar 3 includes a lower side lock bar D3 and an upper side lock bar U3. The lock member D2 has a hook portion 222 of the hook plate 22 with the tip of the hook plate 22 attached downward to the lower mounting portion, and the operating fulcrum portion 225 of the hook plate 22 of the lower lock member D2 is pivotally supported by the lower lock bar D3. The upper side lock member U2 has the hook portion 222 of the hook plate 22 attached to the upper mounting portion so that the tip of the hook portion 222 faces upward, and the operating fulcrum portion of the hook plate 22 of the upper side lock member U2 25 is pivotally supported by the upper lock bar U3, and a handle that is common to the lower lock member D2 and the upper lock member U2 at a position between the lower lock member D2 and the upper lock member U2 in front of the door body d. 4 is attached, and the handle 4 is operatively connected to the lower and upper lock bars D3 and U3. By operating the handle 4, the lower and upper lock bars D3 and U3 are driven to By rotating the operating fulcrum part 225 of each hook plate 22 of each of the lock members D2 and U2 on the side and upper side around the rotation fulcrum part 221 of each hook plate 22, the hook of each hook plate 22 is turned. The portion 222 is inserted into the hook engaging portion 52 of the receiving portion 5, and the lock engaging surface R1 of the hook portion 222 and the lock engaged surface R2 of the hook engaging portion 52 are connected to the hook plate 2. It is substantially as engaged abutment engagement at the same height as the working fulcrum 225.

In this case, as shown in FIG. 12, the handle 4 is mounted on a mounting opening formed at a position between the lower side locking member D2 and the upper side locking member U2 on the front surface of the door body d. A handle base 41 having an opening 410 communicating with the mounting opening, an operating lever mounting portion 411 protruding from the left and right sides of the opening 410 to the back side of the door body d through the mounting opening, and a door on the upper side of the handle base 41. It is pivotally mounted via a first fixed pivot 431 parallel to the front surface of the main body d, and is mounted on the handle base 41 so as to be able to swing up and down, and is operable to protrude to the back side of the door main body d through the mounting opening on the upper side. A handle lever 42 having an arm 421 and a first movable pivot 441 parallel to the first fixed pivot 431 at the upper end at the protruding end of the operating arm 421 of the handle lever 42 The first connecting link 451 is attached to the lower end of the first connecting link 451 from the upper end to the lower end, and the upper end is connected to the lower end of the first connecting link 451 via the second movable pivot 442 parallel to the first fixed pivot 431. An operation fulcrum 461 that is pivotally attached and extends downward from the upper end, and a second fixed pivot 432 that is parallel to the first fixed pivot 431 at the lower end of the operation fulcrum 461 and one end of the operation fulcrum 461 of the handle base 41. The lower end is fixed to the intermediate portion of the first connection link 451 and the lower operation lever 46 having the operation portion 462 that is pivotally attached to the other end and extends obliquely downward toward the rear of the door body d. A second connecting link 452 that is pivotally attached via a third movable pivot 443 parallel to the pivot 431 and has a substantially linear shape from the lower end to the upper end, and a lower end at the upper end of the second connecting link 452. Fixed pivot The operation fulcrum part 471 is pivotally attached via a fourth movable pivot 444 parallel to 431 and extends upward from the lower end, and one end at the upper end of the operation fulcrum part 471 is connected to the operation lever attachment part 411 of the handle base 41. An upper operating lever 47 having an operating portion 472 pivotally attached via a third fixed pivot 433 parallel to the fixed pivot 431 and having the other end extending obliquely upward toward the rear of the door body d; A reversing spring 48 is interposed between the fixed pivot 431 and the second fixed pivot 432, holds the handle lever 42 in a standing state from the handle base 41, and holds the handle lever 42 in a fallen state on the handle base 41. The lower operating lever 46 and the upper operating lever 47 are operatively connected to the lower lock bar D3 and the upper lock bar U3, respectively.
Further, the handle 4 is laid down on the handle base 41, restricts the rotation of the handle lever 42 in the stored state on the handle base 41, and a lever catch 6 that holds the handle lever 42 on the handle base 41, The lock 6 is also provided with a lock unit 7 that releases the rotation restriction of the handle lever 42 in the housed state on the handle base 41 by the catch 6 and makes the handle lever 42 free (turnable) by the handle base 41.
The lever catch 6 is attached to the lower front side of the handle base 41 via a shaft 611 parallel to the front of the door body d so as to be rotatable in the vertical direction, and is normally urged to rotate in one direction by a spring 612. A hook 61 having a claw portion 613 on the front end side which is supported at a substantially right angle with respect to the front surface of the handle base 41 and protrudes forward, and a rear lower side of the handle lever 42 toward the rear of the handle lever 42. A hook receiving portion 62 having a receiving portion 621 that can be engaged with the claw portion 613 of the hook 61 is provided at a rear end portion that protrudes rearward. In this case, the claw portion 613 of the hook 61 is formed to protrude downward on the front end side of the hook 61, the rear surface directed rearward is the engagement surface with the hook receiving portion 62, and the lower surface of the hook 61 is the front end of the hook 61. It is formed obliquely downward from the portion and serves as an engagement guide surface with the hook receiving portion 62. The spring 612 is interposed between the lock unit 7 (in this case, the side surface of the cylinder lock 71) and the hook 61 (in this case, the portion on the front side of the rotation center of the hook 61). It is urged to turn and is directed at a right angle to the front surface of the handle base 41. The hook receiving portion 62 extends rearward from the rear surface of the handle lever 42 in a substantially L shape in plan view, and a receiving portion 621 is formed at the rear end portion thereof, and the front surface directed forward is the engaging surface with the hook 61. It has become. Thus, the hook lever 62 is brought into contact with the guide surface of the hook 61 by the operation of causing the handle lever 42 to fall on the handle base 41, and the hook 61 is pressed against the urging force of the spring 612. By moving and elastically engaging the hook 61 and the hook receiving portion 62, the rotation of the handle lever 42 is restricted and the handle lever 42 is held on the handle base 41.
The lock unit 7 includes a cylinder lock 71 attached to the handle base 41 adjacent to the lever catch 6 with a key hole facing forward, and a handle base 41 on the rear end side of the cylinder lock 71 opposite to the key hole of the rotor 710. Is slidably arranged in the vertical direction of the cylinder lock 71 and is operatively connected to the rotor 710 of the cylinder lock 71 via the slide guide 73. By operating the key of the cylinder lock 71, the rotor 710 is turned to the locked position, thereby It is slid and driven to a retracted position where it does not engage with the hook 61, the engagement between the hook 61 and the hook receiving portion 62 is maintained, and the rotor 710 is turned to the unlocked position to engage the hook 61 of the lever catch 6. The hook 61 is slid and driven to the forward movement position, and the hook 61 is pressed and rotated against the urging force of the spring 612, so that the hook 61 Comprising a slide plate 72 to release the engagement between the hook receiving portion 62. In this case, as shown in FIG. 13, the slide guide 73 is disposed on the rear end surface of the rotor 710 of the cylinder lock 71 at a position eccentric with respect to the rotation center of the rotor 710 and is rotatable with the rotor 710. The cylinder lock 71 includes a protrusion 731 and a guide hole 732 that is formed through the plate surface of the slide plate 72 in a shape of a long hole having a predetermined length in a direction orthogonal to the slide direction of the slide plate 72. The guide protrusion 731 and the guide hole 732 of the slide plate 72 are engaged with each other. When the rotor 710 is turned to the locked position by the key operation of the cylinder lock 71 in this way and the guide protrusion 731 is rotated around the axis of the rotor 710, the slide plate 72 is interlocked with the guide protrusion 731 and the lever catches. 6, which is not engaged with the hook 61, in this case, is slid toward the cylinder lock 71, and the engagement between the hook 61 of the lever catch 6 and the hook receiving portion 62 remains held. When the guide projection 731 is rotated around the axis of the rotor 710, the slide plate 72 is slid to the position where the slide plate 72 is engaged with the hook 61 of the lever catch 6. And the slide plate 72 rotates the hook 61 against the urging force of the spring 612 (in this case, upward), To release the engagement between the click 61 and the hook receiving portion 62, so as to release the rotation restriction of the handle lever 42 on the handle base 41 by lever catch 6.

FIG. 14 shows a tightening operation of the door body d by the multi-point tightening lock system S.
As shown in FIGS. 14A and 14B, when the handle lever 42 is laid down on the handle base 41 (by turning the handle lever 42), the lower and upper operation levers 46 and 47 are moved. By opening the lower side operation lever 46 downward and driving the upper side operation lever 47 upward, the lower locking member D2 moves the hook plate 22 downward. The hook portion 222 is rotated and engaged with the hook engaging portion 52 of the receiving portion 5 from above (see FIG. 6). At the same time, the upper lock member U2 rotates the hook plate 22 upward. The hook portion 222 is engaged with the hook engaging portion 52 of the receiving portion 5 from below, and the side portion on the rotating side of the door body d is attached to the housing B at a plurality of locations by one rotation operation of the handle 4. Locked with. In this state, the handle lever 42 accommodated on the handle base 41 is restricted and held by the lever catch 6 (see FIG. 12). When rotating the handle lever 42 from this state, it is necessary to make the handle lever 42 free on the handle base 41 by the key operation of the lock unit 7 as described above.
On the other hand, as shown in FIG. 14B, when the handle lever 42 is raised (by turning the handle lever 42), the lower and upper operation levers 46 and 47 are substantially reversed in a C shape. By closing, the lower side operation lever 46 is driven upward, the upper side operation lever 47 is driven downward, and the lower side lock member D2 rotates the hook plate 22 upward. The hook portion 222 is detached from the hook engaging portion 52 of the receiving portion 5 (see FIG. 6). At the same time, the upper locking member U2 rotates the hook plate 22 downward to receive the hook portion 222. 5 disengaged from the hook engaging portion 52, by one rotating operation of the handle 4, the locking of the plurality 箇 office door body d and the housing B is released.

Then, in the multi-point fastening locking system S, as shown in FIG. 6, it is fixed by the engagement of the locking member 2 and the receiving portion 5 the side of the rotating side of the door body d a plurality 箇 plants, In particular, the lock member 2 and the receiving portion 5 at each location are made of a rigid body, and as shown in FIG. 14B, the lock engaging surface R1 of the hook portion 222 and the lock engaged surface R2 of the hook engaging portion 52 Are engaged with each other at substantially the same height as the operating fulcrum 225 of the hook plate 22, and this is sufficient for the force in the direction of pushing the door body d from the inside of the housing B to the outside. Even when a pressure of several tons is applied to the door body d due to an increase in pressure inside the housing B due to the occurrence of a short circuit arc inside the housing B, etc. The engagement state between the lock member 2 and the receiving portion 5 at the point is firmly maintained, and the door body It is securely held.

As described above, according to the multi-point fastening locking system S, the lock member 2 made of rigid multiple 箇 plants rotation side portion of the door body d is provided, to which corresponds housing A receiving portion 5 made of a rigid body is provided on the B side, and the lock bar 3 is driven by operating the handle 4 so that the operation fulcrum portion 225 of the hook plate 22 of each lock member 2 is rotated around the rotation fulcrum portion 221 of the hook plate 22. By rotating around the center of movement, the hook portion 222 of the hook plate 22 is inserted into the hook engaging portion 52 of each receiving portion 5 on the case B side, and the lock engaging surface R1 of the hook portion 222 and the hook engaging portion are engaged. Since the lock engaged surface R2 of the joint portion 52 is brought into contact engagement at substantially the same height as the operation fulcrum portion 225 of the hook plate 22, the side portion on the rotating side of the door body d is provided with a plurality of side portions. between the locking member 2 and the receiving portion 5 by a plurality 箇 plants Pressure resistance sufficiently resisting the force in the direction of pushing the door body d from the inside of the housing B to the outside due to the high rigidity of the locking member 2 and the receiving portion 5 at each location and the type of engagement. Even when a pressure of several tons is applied to the door body d due to an increase in the pressure inside the casing B due to, for example, the occurrence of a short-circuit arc inside the casing B, each structure at each locking point is realized. The engagement of the members 2 and 5 can be maintained, and the door body d can be reliably held.
Therefore, according to this explosion爆扉D, by using a multi-point tightening locking system S, the sides of the rotation-side of the door body d with a plurality of multiple 箇 plants and locking member 2 and the receiving portion 5 It is fixed by engagement, and sufficiently resists the force in the direction of pushing out the door body d from the inside of the housing B to the outside due to the high rigidity of the lock member 2 and the receiving portion 5 at each location and the type of engagement. Even when a pressure of several tons is applied to the door body d due to the occurrence of a short-circuit arc in the housing B and a pressure of several tons is applied to the door body d, for example, The engagement of the members 2 and 5 can be maintained, and the door body d can be reliably held.

  Further, in the multi-point tightening lock system S and the explosion-proof door D using the same, the lower lock member D2, the upper lock member U2, the lower lock bar D3, the upper lock bar U3, and the lower lock A common handle 4 is used for the lock members D2 and U2 on the upper side, and an operation lever 46 on the lower side of the handle 4 and an operation lever 47 on the upper side are respectively a lock bar D3 on the lower side and a lock bar U3 on the upper side. The operation levers 46 and 47 on the lower side and the upper side are opened in a substantially C shape by rotating the handle lever 42 so that the handle lever 42 falls on the handle base 41. The actuator lever 46 is driven downward, the actuator lever 47 on the upper side is driven upward, and the hook plate 22 of the lock member D2 on the lower side is rotated downward to move the hook portion. 22 is engaged with the hook engaging portion 52 of the receiving portion 5 from above, and the hook plate 22 of the locking member U2 on the upper side is rotated upward to move the hook portion 222 to the hook engaging portion 52 of the receiving portion 5. On the other hand, the lower and upper operation levers 46 and 47 are closed in a substantially reverse C shape by rotating the handle lever 42 that engages from below and raises the handle lever 42 on the handle base 41. Then, the lower operation lever 46 is driven upward, the upper operation lever 47 is driven downward, and the hook plate 22 of the lower lock member D2 is rotated upward to move the hook portion 222. The hook portion 22 of the receiving portion 5 is detached from the hook engaging portion 52, and the hook plate 22 of the upper lock member U2 is rotated downward to be detached from the hook engaging portion 52 of the receiving portion 5. So vertical A multi-point tightening lock system S is incorporated in the entire long side of the long explosion-proof door D, and the handle 4 is provided at the middle position in the vertical direction of the door body d, which is easy to operate the handle. The main body d can be securely held and the handle can be easily operated.

In addition, the handle 4 includes a lever catch 6 including a hook 61 and a hook receiving portion 62 for restricting the rotation of the handle lever 42 accommodated on the handle base 41 and holding the handle lever 42 on the handle base 41. The handle lever 42 is mounted on the handle base 41 by elastically engaging the hook 61 of the lever catch 6 and the hook receiving portion 62 with a simple operation of lying down the handle lever 42 on the handle base 41. It is possible to hold the door body d securely and securely hold the engagement state of the lock members 2 with respect to the receiving portions 5 so that the tightened state of the door body d can be held more reliably.
In addition, since the rotation restriction of the handle lever 42 by the lever catch 6 is released by the lock unit 7 using the cylinder lock 71, the handle lever 42 is locked once stored on the handle base 41. This unlocking can be performed only by the manager of the key of the cylinder lock 71, restricting the opening and closing by an unspecified number of people in terms of safety management such as an explosion-proof door, and is extremely effective for a door that normally needs to be locked.

In this embodiment, the receiving part extends in a substantially L-shaped cross section in plan view from one end of the fixing part fixed to the housing and the fixing part, and is parallel to the fixing part in the substantially L-shaped shape ( It is assumed that the hook engaging portion of the receiving portion is provided with a substantially straight flat surface with the surface directed to the housing (the front side) at the time of mounting) as a lock engaged surface. A plane that is substantially U-shaped in cross-section in plan view extends from one end of the fixed portion, and a surface of the substantially U-shaped shape that is parallel to the fixed portion (at the time of mounting) and directed to the housing (front side) is substantially defined as a lock engaged surface. It may be a straight flat surface. Even if it does in this way, the effect similar to the said embodiment can be acquired about a receiving part.
Further, a plurality of locking member includes a lower-side locking member is arranged on the lower side of the attachment points of the plurality of mounting 箇 office door body, an upper-side lock member disposed on the mounting portion of the upper side, The lower lock member has a hook plate with the tip of the hook plate attached downwardly at the lower mounting position, and the operating point of the hook plate of the lower lock member is pivotally supported by the lower lock bar. The top end of the hook part of the hook plate is mounted upward at the mounting position on the upper side, the operating fulcrum of the hook plate of the upper side lock member is pivotally supported by the upper lock bar, and the lower side lock is placed in front of the door. A handle common to the lower side lock member and the upper side lock member is attached at a position between the member and the upper side lock member, and the handle and the lower and upper side lock bars are made. Although the plurality of locking members are not connected to the lower side locking member and the upper side locking member in particular, the tip of the hook portion of the hook plate is attached downward or upward at each attachment location, The operating fulcrum portion of the hook plate of each lock member is pivotally supported by a common lock bar, and an existing multi-point tightening handle generally attached to the position that hits one end of the lock bar in front of the door is attached. The handle and the lock bar may be operatively connected. Even if it does in this way, about the holding | maintenance of a door main body, there can exist an effect similar to the said embodiment.

B Case f1 Upper frame f2 Left side frame f3 Right side frame f4 Lower frame f5 Upper extension frame f6 Left extension frame f7 Right extension frame f8 Lower extension frame D Explosion-proof door d Door body p1 Front panel p2 Top panel p3 Left side panel p4 Right side Face plate p5 Bottom plate 1 Hinge member 11 Mounting base 111 Mounting portion 113 Receiving portion 12 Hinge body 121 Mounting portion 122 Intermediate portion 123 Support portion 124 Hinge pin insertion portion 13 Hinge pin 14 Snap pin S Multi-point tightening lock system 2 Lock member D2 Lower portion Side lock member U2 Upper side lock member 21 Mounting base 211 Fixing portion 212 Shaft insertion portion 213 Support portion 22 Hook plate 220 Shaft insertion portion 221 Rotating fulcrum portion R1 Lock engagement surface 222 Hook portion 223 Groove 224 Shaft insertion portion 225 Moving fulcrum 23 Connecting shaft 3 Lock bar D3 Lower lock bar U3 Upper lock bar 31 Axis 4 Handle 41 Handle base 410 Opening 411 Actuating lever mounting part 42 Handle lever 420 Opening 421 Acting arm 431 First fixed pivot 432 2nd fixed pivot 433 3rd fixed pivot 441 1st movable pivot 442 2nd movable pivot 443 3rd movable pivot 444 4th movable pivot 451 1st connection link 452 2nd connection link 46 Lower part Side actuating lever 461 actuating fulcrum 462 actuating part 47 upper actuating lever 471 actuating fulcrum part 472 actuating part 48 reversing spring 5 receiving part 51 fixing part R2 lock engaged surface 52 hook engaging part 6 lever catch 61 hook 611 Shaft 612 Spring 613 Claw 62 Hook receiving portion 621 Receiving 7 lock unit 70 attached portion 71 a cylinder lock 710 rotor 72 slide plate 73 slide guide 731 guides the projecting force 732 guide hole b1 mounting bolts b2 mounting bolts b3 mounting bolt

Claims (5)

At the rear of the door along the side of the rotation-side locking member is arranged in a plurality of mounting 箇 plant, the in conjunction with the operation of the handle attached to the front of the door the lock bar coupled to the locking member It is a multi-point tightening lock system of a type that engages and disengages each lock member with respect to a receiving part on the housing side by driving forward and backward along the side part on the back side of the door,
Each locking member is
A mounting base made of a material having high rigidity, and a fixing base that is fixed to the mounting portion on the back surface of the door, and a support portion that has a shaft insertion portion that extends from the fixing portion and penetrates between both side surfaces;
A rotation fulcrum portion made of a material having high rigidity and formed on the base end side and having a shaft insertion portion communicating with the shaft insertion portion of the mounting base, and a cross-sectional view in a side view from the rotation fulcrum portion toward the distal end side A hook portion that is formed in an L-shape and has a substantially straight flat surface with a surface facing the rotation fulcrum portion side of the substantially L-shape as a lock engagement surface, and the rotation fulcrum portion and the hook Adjacent to the pivot fulcrum part and facing the lock engaging surface of the hook part through a groove having a substantially V-shaped or substantially U-shaped cross section in a side view, A hook plate having an operating fulcrum portion having a shaft insertion portion parallel to the shaft insertion portion of the rotation fulcrum portion;
With
In each of the mounting bases, the fixing portion is fixed to each of the mounting locations on the back surface of the door, and the support portion protrudes toward the rear of the door at a substantially right angle to the back surface of the door,
Each hook plate is rotatably attached to each attachment base through a connecting shaft between a shaft insertion part of the rotation fulcrum part and a shaft insertion part of each attachment base, and each of the operation fulcrum parts The shaft insertion portion is operatively connected to the lock bar through a shaft protruding from the lock bar,
The receiving portion is made of a material having high rigidity, and is fixed to a housing, and extends from the fixed portion to a substantially L-shaped or substantially U-shaped cross section in plan view. A hook engaging portion having a substantially straight flat surface as a lock engaged surface, which is parallel to the housing and directed toward the housing in the letter shape,
Each receiving portion is fixed at a position corresponding to each locking member on the back surface of the door on the front surface of the housing, and the hook engaging portion is disposed in parallel with the front surface of the housing.
The lock bar is driven by the operation of the handle, and the operating fulcrum portion of each hook plate is rotated around the rotation fulcrum portion of each hook plate, whereby the hook plate The hook portion is inserted into the hook engaging portion of the receiving portion, and the lock engaging surface of each hook portion and the lock engaged surface of the hook engaging portion are connected to the operating fulcrum of the hook plate. Make contact engagement at approximately the same height position,
A multi-point tightening lock system. The locking member is provided with an upper-side lock member disposed on the lower side locking member and the upper side attachment portion disposed on the lower side of the attachment points of the plurality of mounting 箇 office doors, the lower-side locking member The tip of the hook portion of the hook plate is attached downward to the lower mounting portion, the operating fulcrum of the hook plate of the lower lock member is pivotally supported by the lower lock bar, and the upper lock member is The tip of the hook portion of the hook plate is mounted upward at the mounting location of the hook plate, the operating fulcrum portion of the hook plate of the upper lock member is pivotally supported by the lock bar on the upper side, and the lower portion at the front of the door A handle common to the lower side lock member and the upper side lock member is attached at a position between the side lock member and the upper side lock member. Parts side and the upper side multipoint tightening locking system according to claim 1 in which each locking bar is operatively connected to. The handle is mounted on a mounting opening formed at a position between the lower side locking member and the upper side locking member on the front side of the door, and an opening communicating with the mounting opening on the upper side and both sides of the opening. A handle base having an operating lever mounting portion protruding to the rear side of the door through the mounting opening, and the handle base pivoted to the upper side of the handle base via a first fixed pivot parallel to the front of the door A handle lever having an operating arm mounted on the upper side so as to be pivotable and capable of projecting to the back side of the door through the mounting opening on the upper side, and an upper end at the projecting end of the operating arm of the handle lever. A first connecting link pivotally attached via a first movable pivot parallel to the fixed pivot and having a substantially inverted L shape from the upper end to the lower end; and the upper end at the lower end of the first connection link An operating fulcrum portion that is pivotally attached through a second movable pivot that is parallel to one fixed pivot and extends downward from the upper end, and one end at the lower end of the operation fulcrum is connected to the operating lever mounting portion of the handle base. A lower operating lever having an operating portion pivotally attached via a second fixed pivot parallel to the fixed pivot and having the other end extending obliquely downward toward the rear of the door, and the middle of the first connecting link A second connecting link having a lower end pivotally attached to the part via a third movable pivot that is parallel to the first fixed pivot and having a substantially linear shape from the lower end to the upper end; and The lower end is pivotally attached to the upper end via a fourth movable pivot that is parallel to the first fixed pivot, and the operation fulcrum extends upward from the lower end. A mounting portion parallel to the first fixed pivot An upper operating lever having an operating portion pivotally attached through three fixed pivots and having the other end extending obliquely upward toward the rear of the door, and the first fixed pivot and the second fixed pivot And a reversing spring for holding the handle lever in a lying state on the handle base, and holding the handle lever in a lying state on the handle base. The actuating levers are operatively connected to the lower side lock bar and the upper side lock bar, respectively, and the lower and upper side levers are operated by rotating the handle lever to cause the handle lever to fall on the handle base. Each of the actuating levers is opened in a substantially C shape, the lower actuating lever is driven downward, the upper actuating lever is driven upward, and the lower locking member Rotates the hook plate downward to engage the hook portion with the hook engaging portion of the receiving portion from above, and the upper locking member rotates the hook plate upward. By engaging the hook portion with the hook engaging portion of the receiving portion from below and rotating the handle to raise the handle lever on the handle base, the lower and upper operation levers are moved. The actuator is closed in a substantially reverse C shape, and the lower operating lever is driven upward and the upper operating lever is driven downward. The lower locking member causes the hook plate to move upward. The hook portion is rotated to disengage from the hook engaging portion of the receiving portion, and the lock member on the upper side rotates the hook plate downward to move the hook portion to the hook engaging portion of the receiving portion. Leave the joint Multipoint tightening locking system according to claim 2 in which. The handle is attached to the lower part of the front face of the handle base so as to be pivotable in the vertical direction via an axis parallel to the front face of the door, and is normally biased by a spring to be substantially perpendicular to the front face of the handle base. And a hook having a claw on the front end side that protrudes toward the front, and a rear end that protrudes toward the rear of the handle lever on the lower back side of the handle lever and protrudes toward the rear. A hook receiving portion having a receiving portion engageable with the claw portion of the hook; and by causing the handle lever to fall on the handle base, the hook and the hook receiving portion are elastically engaged with each other. A lever catch that restricts the rotation of the handle lever and holds the handle lever on the handle base, and a lever catch on the handle base. A cylinder lock that is attached in contact with the keyhole facing forward, and is disposed on the rear end side opposite to the keyhole of the rotor of the cylinder lock so as to be slidable in the vertical direction of the handle base, and the rotor of the cylinder lock Slidably driven to a position not engaged with the hook of the lever catch by turning the rotor to a locked position by operating the key of the cylinder lock. By holding the engagement with the hook receiving portion and rotating the rotor to the unlocked position, the lever catch is slid to the position where it engages with the hook, and the hook is resisted against the biasing force of the spring. And a slide plate for releasing the engagement between the hook and the hook receiving portion. The multi-point tightening locking system according to claim 3, further comprising in combination a lock unit for releasing the rotation restriction of the handle lever on the handle base that. One side was pivotally connected to one side of the housing via a hinge member and the other side was tightened to the housing via a locking device, generated inside the housing Explosion-proof door that resists large pressure,
The locking device;
Using the multi-point tightening lock system according to any one of claims 1 to 4 ,
Explosion-proof door characterized by that.

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