JP2009138462A - Door closing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely close a door without causing the fall of a lock device of the door even if pressure of several tons is applied to the door due to the rise of pressure in a case. <P>SOLUTION: The door D is turnably connected to the case B through a hinge member H, and respective other parts not connected by the hinge member H are fixed at a plurality of locking points by the engagement between a plurality of bell-shaped holes 19 formed in a plurality of sliding members 18 sliding interlocked by the operation of a handle 28 on the door D side, and a plurality of locking pins 11 protrusively provided on the case B side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a door tightening structure used for a door that comes into contact with a large pressure due to an increase in pressure inside a housing, such as an explosion-proof door.

  In general, a housing such as a high-voltage distribution box has an explosion-proof structure on the door in preparation for an increase in internal pressure when a short-circuit arc occurs. A conventional explosion-proof door is connected to one side of a housing via a hinge member, and a locking device such as a locking bracket is disposed on the other side, and the door is formed by the hinge member and the locking device. It is tightened in close contact with, and a blast when a short-circuit arc occurs prevents damage inside the casing from scattering outside the casing. This kind of door tightening structure is described in Patent Document 1 and the like.

Utility Model Registration No. 3034496

  However, in a conventional door-tightening structure such as an explosion-proof door, the door is coupled 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 Because it is only fixed, when a pressure of several tons is applied to the door due to an increase in pressure inside the housing, locking devices such as locking brackets will not withstand this pressure and will fall off the door There's a problem.

  The present invention solves such a conventional problem. In this type of door tightening structure, the door is pivotally connected to the housing via the hinge member and is not connected by the hinge member. Even if several tons of pressure are applied to the door due to an increase in the pressure inside the housing, the door locking device will not drop off. The purpose is to securely tighten the door.

In order to achieve the above object, the door tightening structure of the present invention is a door that comes into contact with a large pressure due to an increase in pressure inside the housing, and one side of the door is connected to one side of the housing via a hinge member. In a door tightening structure in which the door is tightened to the housing by a locking device that is rotatably connected to the side of the door and provided between the door and the housing.
The locking device is
(1) Along the other parts in the vertical and horizontal directions that are not connected by the hinge member of the case, the vertical and horizontal parts are arranged at appropriate intervals and project toward the door. A plurality of locking pins having locking grooves on the peripheral surface;
(2) Installed on the inner surface of the door so as to be slidable in the vertical direction and the horizontal direction along the vertical and horizontal parts facing the other parts of the housing. A plurality of slide members in which a plurality of dart holes formed continuously through a large hole that can be inserted and a small hole through which the locking groove can be inserted are formed at intervals corresponding to the locking pins, and the vertical direction and It is rotatably installed between mutually adjacent ends of each horizontal part, and one is connected to the vertical slide member and the other is connected to the horizontal slide member, the vertical direction and A plurality of crank members that connect the slide members in the horizontal direction in an interlockable manner;
(3) Provided on the outer surface of the door and operatively connected to the vertical slide member or the horizontal slide member to move the vertical slide member or the horizontal slide member vertically or horizontally. A handle that drives linearly;
With
(4) A position where each of the vertical and horizontal slide members can be engaged with and disengaged from each of the locking pins by aligning the large holes of the respective dart holes with the locking pins by operating the handle. And the small holes engage with the locking grooves of the locking pins from the state where the locking pins are inserted into the large holes of the respective dart holes. The locking pin is configured to slide in conjunction with a position where the locking pin can be locked, and to lock and unlock the door by engaging and disengaging each of the holes and the locking pins.
This is the gist.

  In this case, a plurality of guide holes formed in one of the slide members or doors in a length substantially the same as the slide distance of the slide members in the sliding direction of the slide members, and the guide holes in the other A plurality of guide pins provided so as to be engageable with each other, guiding the slide member in the sliding direction, and locking each dart hole of the slide member to a position where the lock pin can be engaged and disengaged. It is preferable to provide a slide guide that guides to various positions.

  According to the door tightening structure of the present invention, with the above-described configuration, the door is pivotally connected to the housing via the hinge member, and other parts not connected by the hinge member are connected to a plurality of parts by a single lock device. Because it is fixed at the locking point (locking point with multiple locking pins and daruma holes), even if a pressure of several tons is applied to the door due to an increase in pressure inside the housing, this pressure is locked against the hinge member. The doors can be received in a distributed manner by a plurality of locking points by the device, whereby the door can be securely tightened without dropping the door locking device.

  Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a door tightening structure. As shown in FIG. 1, the door tightening structure 1 is applied to a door that comes into contact with a large pressure due to an increase in pressure inside the housing B, and one side of the door D is connected to the housing via a hinge member H. It is rotatably connected to one side of the body B, and a lock device 10 is provided between the door D and the housing B, and the door D is fastened to the housing B by the lock device 10. ing.

  In this door tightening structure 1, the front surface of the housing B is configured by a rectangular fixed frame F to form a rectangular opening, and the door D is formed in a rectangular shape that is substantially the same as or slightly smaller than the fixed frame F. A cylindrical shape portion DF having a rectangular cross section is formed on the entire inner surface corresponding to the fixed frame F, and one side portion of the door D, in this case, the right side portion is the right side of the fixed frame F of the housing B by the hinge member H. The cylindrical shape portion DF on the inner surface of the door D is in contact with the fixed frame F when the door D is closed (not shown). For convenience of explanation here, among the respective surfaces constituting the cylindrical shape portion DF, in particular, among the entire inner circumference corresponding to the fixed frame F described above, the left side is the door inner left side DF2, and the upper side is The door inner surface upper side portion DF3, the lower side portion is referred to as the door inner surface lower side portion DF4, and among the inner surfaces of the outer peripheral portion, the left inner surface is the outer left inner surface DF5, the upper inner surface is the outer upper inner surface DF6, the lower inner portion The side surface is referred to as the outer periphery lower inner surface DF7, and the surfaces facing the door inner surface left side DF2, the door inner surface upper portion DF3, and the door inner surface lower side portion DF4 between the inner periphery and the outer periphery are the frame contact surface left surface. DF8, frame contact surface upper side surface DF9, frame contact surface lower side surface DF10, and in particular, the inner surface of the cylindrical portion DF is the frame contact surface left inner surface DF81, frame contact surface upper inner surface DF91, frame pair Among the surfaces constituting the fixed frame F, the left side surface F2 is referred to as a tangential lower inner surface DF101. Upper surface of the upper portion F3, will be referred to lower side and the lower side surface F4. The door D has a vertical portion not connected by the hinge member H of the cylindrical shape portion DF, in this case, in the center in the width direction of the left side surface DF8 of the frame contact surface in the vertical direction except for the upper and lower ends. A plurality of circular holes DF0 (hereinafter referred to as pin insertion holes DF0) having a predetermined inner diameter are formed at predetermined intervals, and similarly, the frame contact surface upper side surface DF9 and the frame contact surface lower side surface DF10, respectively. A plurality of circular holes DF0 (pin insertion holes DF0) having a predetermined inner diameter are formed at predetermined intervals in the horizontal direction except for an end portion close to the frame contact surface left side DF8 side at the center in the width direction. It is. Further, in this structure 1, a small length having a predetermined length at the center in the width direction of the outer peripheral left inner surface DF5, outer peripheral upper inner surface DF6, and outer peripheral lower inner surface DF7 corresponding to the positions of these pin insertion holes DF0. The same number of protruding pins G1 (hereinafter referred to as guide pins G1) at the same pitch as the pin insertion holes DF0 are directed toward the opposing surfaces of the outer left inner surface DF5, outer upper inner surface DF6, and outer lower inner surface DF7. Projected. On the other hand, the fixed frame F has a vertical portion that is not connected by the hinge member H, in this case, at the same predetermined interval as each pin insertion hole DF0 on the door D side in the vertical direction to the left side surface F2. In addition, each other part in the horizontal direction, in this case, a predetermined inner diameter smaller than the pin insertion hole DF0 at the same predetermined interval as each pin insertion hole DF0 on the door D side in the horizontal direction on each of the upper side surface F3 and the lower side surface F4. A plurality of circular holes F0 (hereinafter referred to as pin mounting holes F0) are formed. In this way, the locking device 10 is assembled between the cylindrical portion DF of the door D and the fixed frame F.

  The locking device 10 includes a plurality of locking pins 11 installed on the fixed frame F of the housing B, a plurality of slide members 18 and a crank member 24 installed inside the cylindrical portion DF on the inner surface of the door D, The handle 27 is attached to the outer surface of the door D and is operatively connected to the slide member 18 on the inner surface of the door D.

  Each of the plurality of locking pins 11 has a locking groove 14 on the outer peripheral surface as shown in FIGS. In this case, the locking pin 11 comprises a cylindrical shaft having a short predetermined outer diameter having a predetermined length, and two circular flanges 12 having a predetermined outer diameter on one end (tip) side. , 13 (when the two flanges 12 and 13 are used separately in the following description, one flange 12 at the tip is called the tip flange 12 and the other flange 13 is called the intermediate flange 13) in parallel at a predetermined interval. Formed, a locking groove 14 having a predetermined outer diameter smaller than the outer diameter of each flange 12, 13 is formed between these flanges 12, 13, and a screw 15 is cut on the other end side, A washer 16 is passed through the screw 15 so that the nut 17 is fastened. These locking pins 11 have screws 15 inserted into the respective pin mounting holes F0 of the fixing frame F from the front side, a washer 16 is passed through the screw 15 on the back side, and a nut 17 is tightened. The nut 17 and the intermediate flange 13 of the locking pin 11 are fixed by sandwiching the entire periphery of the pin mounting hole F0 from both sides. In this way, the plurality of locking pins 11 are attached to the pin attachment holes F0 of the fixed frame F, and the upper side surface F3 and the lower side surface F4 are arranged at appropriate intervals in the vertical direction along the left side surface F2 of the fixed frame F. The one end side (tip side) having two flanges 12 and 13 and the locking groove 14 is protruded toward the door D when closed. Each pin mounting hole F0 of the fixed frame F described above has an inner diameter slightly larger than the outer diameter of the screw 15 so that the screw 15 of the locking pin 11 can be inserted, and the door D described above. Each pin insertion hole DF0 of the cylindrical shape portion DF on the inner surface of the inner diameter of the locking pin 11 is set to have an inner diameter slightly larger than the outer diameter of the flange 12 so that the distal end flange 12 of the locking pin 11 can be inserted.

  As shown in FIGS. 2 and 3, each of the plurality of slide members 18 is an elongated plate, and a large hole 20 through which the plurality of locking pins 11 can be inserted and a locking groove 14 of each locking pin 11 can be inserted. It has a plurality of dart holes 19 formed by continuously forming small holes 21. In this case, the plurality of slide members 18 are the left, upper, and lower three slide members, and these slide members 18 are respectively in the left side portion of the cylindrical shape portion DF and the upper portion of the cylindrical shape portion DF on the inner surface of the door D. It is made of an elongated angle member having an L-shaped cross section that is slightly smaller than the length and width of each part of the cylindrical shape part DF so that it can be arranged in the lower part of the cylindrical shape part DF. An elongated guide plate 23 having a right angle is provided on one side edge of the slide plate 22. Each slide member 18 is arranged close to the inside of each part of the cylindrical shape portion DF so that adjacent ends do not contact each other. If this is the initial position, each slide member 18 is placed on the slide plate 22 of each slide member 18 at the initial position. Are formed such that the large hole 20 (the center) of the dart hole 19 coincides with the position corresponding to each pin insertion hole DF0 (the center position) formed in the cylindrical part DF of the door D, A continuous small hole 21 is formed adjacent to the side opposite to the sliding direction of each slide member 18. It should be noted that the large holes 20 of the respective dull holes 19 are set to have an inner diameter slightly larger than the outer diameter of the flange 12 so that the distal end flange 12 of the engagement pin 11 can be inserted, and the smaller holes 21 are the distal end flanges of the engagement pin 11. The inner diameter is set to be smaller than the outer diameter of the flange 12 so that 12 can be locked, and slightly larger than the outer diameter of the locking groove 14 so that the locking groove 14 of the locking pin 11 can be inserted. Further, these slide members 18 are provided with a plurality of guide holes G0 through which the guide pins G1 on the inner surface of the door D can be inserted, corresponding to the positions of these daruma holes 19 in the guide plate 23. In this case, one engagement end of each guide pin G1 of each guide hole G0 corresponds to the position of the large hole 20 of each spar hole 19, and each slide member 18 faces away from the sliding direction of each slide member 18. It is formed in the shape of an elongated hole having a length substantially the same as the slide distance. In this way, the left slide member 18 continues through a large hole 20 through which each locking pin 11 of the left side surface F2 of the fixed frame F can be inserted and a small hole 21 through which the locking groove 14 of the locking pin 11 can be inserted. A plurality of dart holes 19 are formed at intervals corresponding to the respective locking pins 11, and the guide plate 23 is a guide corresponding to each of the inner left side surface DF 5 of the cylindrical portion DF on the inner surface of the door D. The pin G1 is aligned through the guide hole G0, and the slide plate 22 is aligned with the frame contact surface left inner surface DF81 of the cylindrical shape portion DF, and can be slid vertically inside the left side portion of the cylindrical shape portion DF. Installed. Similarly, the upper slide member 18 continuously includes a large hole 20 through which each locking pin 11 of the upper surface F3 of the fixed frame F can be inserted and a small hole 21 through which the locking groove 14 of the locking pin 11 can be inserted. A plurality of dart holes 19 are formed at intervals corresponding to the respective locking pins 11, and the guide plate 23 is an inner surface of the door D and a guide corresponding to the outer peripheral upper inner surface DF 6 of the cylindrical portion DF. The pin G1 is aligned through the guide hole G0, and the slide plate 22 is aligned with the inner surface DF91 on the frame contact surface of the cylindrical shape portion DF, and can slide horizontally inside the upper portion of the cylindrical shape portion DF. Installed. The lower slide member 18 continuously includes a large hole 20 through which each locking pin 11 of the lower surface F4 of the fixed frame F can be inserted and a small hole 21 through which the locking groove 14 of the locking pin 11 can be inserted. A plurality of formed dart holes 19 are formed at intervals corresponding to the respective locking pins 11, and the guide plate 23 is formed on the inner surface of the door D on the inner peripheral lower surface DF 7 of the cylindrical portion DF, and the corresponding guide pin G 1. Is fitted through the guide hole G0, and the slide plate 22 is fitted to the frame inner surface DF101 of the cylindrical shape portion DF so that it can slide horizontally inside the lower side portion of the cylindrical shape portion DF. Installed.

  As shown in FIGS. 2 and 3, the plurality of crank members 24 are configured in a lever structure that connects the slide members 18 so as to be interlocked with each other. In this case, the plurality of crank members 24 are two upper and lower crank members, each having a substantially L-shaped planar shape. As shown in FIG. 2, the upper crank member 24 is inside the cylindrical portion DF on the inner surface of the door D, and the center portion of the crank member 24 is the adjacent end of the door inner surface left side portion DF2 and the door inner surface upper portion DF3. One end of the slide plate 22 of the left slide member 18 installed inside the left side of the cylindrical portion DF The other end is connected via a connecting pin 26, and the other end is connected to one end of the slide plate 22 of the upper slide member 18 installed inside the upper part of the cylindrical shape portion DF via the connecting pin 26. The Similarly, as shown in FIG. 3, the lower crank member 24 has a cylindrical shape portion DF, and the center portion of the crank member 24 is adjacent to the door inner left side portion DF2 and the door inner surface lower side portion DF4. The other end of the slide plate 22 of the slide member 18 on the left side, which is installed in the left side of the cylindrical shape part DF, is supported rotatably by the pivot pin 25 on the inside of the part. And the other end is connected to one end of the slide plate 22 of the lower slide member 18 installed inside the lower portion of the cylindrical shape portion DF via the connection pin 26. . In this way, the left slide member 18 and the upper and lower slide members 18 are interlocked with the slide of the left slide member 18 in the vertical direction, that is, upward or downward, so that the upper slide member 18 While sliding in the horizontal direction, that is, in the right direction or the left direction, the lower slide member 18 is connected so as to slide in the horizontal direction, that is, in the left direction or the right direction.

  As shown in FIG. 4, the handle 27 is installed on the outer surface of the door D, and is operatively connected to the slide member 18 on the inner surface of the door D. In this case, the handle 27 adopts a drawer rotation operation type lock handle device, and is fixedly embedded in the left-side vertical center of the outer surface of the door D. The lock handle device 27 includes a handle 28 that is rotatably attached to the outer surface of the door D, a locking shaft 29 that can be rotated by a pulling rotation operation of the handle 28, and a pinion 30 that is interlocked with the locking shaft 29. And a rack 31 fixed to the center of the guide plate 23 of the left slide member 18 on the inner surface of the door D and engageable with the pinion 30, and the teeth of the rack 31 are opened in accordance with the pitch of the pinion 30. It is composed of a series of horizontally long slots. By rotating the handle 28 upward in this way, the sliding member 18 on the left side of the inner surface of the door D is linearly driven in the vertical direction, in this case, downward due to the cooperative action of the pinion 30 and the rack 31. In conjunction with the slide member 18, the upper slide member 18 moves linearly in the horizontal direction, in this case, the left direction, and the lower slide member 18 moves linearly in the horizontal direction, in this case, the right direction. Conversely, by rotating the handle 28 downward, the left slide member 18 is linearly driven upward by the cooperative action of the pinion 30 and the rack 31, and in conjunction with the slide member 18, The slide member 18 linearly moves in the right direction, and the lower slide member 18 linearly moves in the left direction.

  FIGS. 5 to 8 specifically show the locking and unlocking forms of the door D by the door tightening structure 1. First, as shown in FIGS. 5 and 6, when the handle 28 is rotated upward on the outer surface of the door D, the left slide member 18 is moved into the cylinder on the inner surface of the door D by the cooperative action of the pinion 30 and the rack 31. Linearly driven by a predetermined slide distance in the vertical direction, in this case, downward, by engagement guides between the guide holes G0 of the guide plate 23 and the guide pins G1 of the outer peripheral left inner surface DF5 inside the left side of the shape-shaped portion DF Then, the large holes 20 of the respective dart holes 19 of the slide plate 22 are in communication with the respective pin insertion holes DF0 of the cylindrical portion DF. The upper slide member 18 slides in conjunction with the movement of the left slide member 18, and the upper slide member 18 is formed between the guide holes G0 of the guide plate 23 and the guide pins G1 of the outer peripheral inner surface DF6 inside the upper portion of the tubular portion DF. Due to the engagement guide, it is linearly driven by a predetermined slide distance in the horizontal direction, in this case, in the left direction, and the large holes 20 of the respective blind holes 19 of the slide plate 22 coincide with the respective pin insertion holes DF0 of the cylindrical shape portion DF. The lower slide member 18 communicates with the guide holes G0 of the guide plate 23 and the guide pins G1 of the outer peripheral lower inner surface DF7 in the horizontal direction inside the lower portion of the cylindrical portion DF. It is linearly driven by a predetermined slide distance in the right direction, and the large holes 20 of the respective dowel holes 19 of the slide plate 22 coincide with the respective pin insertion holes DF0 of the cylindrical shape portion DF. Communicating with Te. As a result, the three sliding members 18 on the inner surface of the door D are slid to positions where the respective dart holes 19 can be engaged with and disengaged from the respective locking pins 11 on the three surfaces of the fixed frame F, and the door D is unlocked. Therefore, if the door D is opened from the housing B, the cylindrical shape portion DF is passed through all the pin insertion holes DF0 of the cylindrical shape portion DF on the inner surface of the door D by closing the door D toward the fixed frame F. All the locking pins 11 on the fixed frame F are inserted into the large holes 20 of all the dart holes 19 of the internal slide member 18. Moreover, if the door D is closed, by opening the door D, through all the pin insertion holes DF0 of the cylindrical shape portion DF on the inner surface of the door D, all the darling holes of the slide member 18 inside the cylindrical shape portion DF All the locking pins 11 on the fixed frame F inserted through the 19 large holes 20 come off. That is, the door D can be opened and closed. Then, from the state in which the door D is closed, that is, through the all pin insertion holes DF0 of the cylindrical shape portion DF on the inner surface of the door D, the large holes 20 of all the dowel holes 19 of the slide member 18 inside the cylindrical shape portion DF. Further, when the handle 28 is rotated downward from the state in which all the locking pins 11 on the fixed frame F are inserted, as shown in FIGS. 7 and 8, the cooperative action of the pinion 30 and the rack 31 is caused. The left slide member 18 on the inner surface of the door D is vertically guided by the engagement guide between the guide holes G0 of the guide plate 23 and the guide pins G1 of the outer peripheral left inner surface DF5 inside the left side of the cylindrical portion DF. In this case, it is linearly driven upward by a predetermined slide distance, and the small holes 21 of the respective dowel holes 19 of the slide plate 22 are in communication with the respective pin insertion holes DF0 of the cylindrical shape portion DF, and are connected to the respective latches. Locked to the locking groove 14 of the emissions 11. That is, the front end flange 12 of each locking pin 11 is locked to the peripheral edge of each small hole 21. The upper slide member 18 slides in conjunction with the movement of the left slide member 18, and the upper slide member 18 is formed between the guide holes G0 of the guide plate 23 and the guide pins G1 of the outer peripheral inner surface DF6 inside the upper portion of the tubular portion DF. It is driven linearly by a predetermined sliding distance in the horizontal direction, in this case, to the right by the engagement guide, and the small holes 21 of the respective blind holes 19 of the slide plate 22 coincide with the respective pin insertion holes DF0 of the cylindrical shape portion DF. The lower slide member 18 is in communication with the locking groove 14 of each locking pin 11 and each of the guide holes G0 of the guide plate 23 and the outer peripheral lower inner surface DF7 inside the lower part of the cylindrical shape portion DF. By the engagement guide with the guide pin G1, it is linearly driven by a predetermined slide distance in the horizontal direction, in this case, in the left direction, and the small holes 21 of the respective blind holes 19 of the slide plate 22 are cylindrical. Communicating Consistent with the pin insertion hole DF0 of Jo unit DF, locked to the locking groove 14 of the engaging pin 11. That is, the front end flange 12 of each locking pin 11 is locked to the peripheral edge of each small hole 21. As a result, the three slide members 18 on the inner surface of the door D are slid to positions where the dart holes 19 can be locked to the respective locking pins 11 on the three surfaces of the fixed frame F, and the door D is locked. In this way, the right side portion of the door D is coupled to the casing B by the hinge member H, and the left side portion, the upper portion, and the lower portion that are not connected by the hinge member H of the door D are formed of the plurality of locking pins 11 and the slide member 18. It is fixed at a plurality of locking points by engagement with a plurality of small holes 21 (peripheral edges thereof). In this state, as described above, even when a pressure of several tons is applied to the door D due to an increase in pressure inside the casing B, this pressure is distributed at a plurality of locking points. The load is reduced, and the door D is securely fastened to the housing B without the lock points being damaged and falling off.

  As described above, according to the door tightening structure 1, the right side portion of the door D is rotatably coupled to the right side portion of the fixed frame F of the housing B by the hinge member H. By operating the handle 28, the left side portion, the upper portion, and the lower portion that are not coupled with each other, the left side vertical slide member 18 and the upper and lower horizontal slide members 18 are connected to a plurality of slide members 18. A position in which the large hole 20 of the daruma hole 19 coincides with the plurality of locking pins 11 on the left side surface, the upper side surface, and the lower side surface of the fixing frame F of the housing B, and can be engaged with and disengaged from each locking pin 11. Each small hole 21 engages with the locking groove 14 of each locking pin 11 from the state in which the plurality of locking pins 11 are inserted into the large hole 20 of the daruma hole 19, and The locking pin 11 slides in conjunction with the lockable position, and the left side A type in which the door D is locked and unlocked by engaging and disengaging the plurality of dart holes 19 of the upper and lower slide members 18 and the plurality of locking pins 11 on the left side, upper side, and lower side of the fixed frame F. And the door 2 is fixed to the entire periphery of the housing B with a plurality of locking points by the single locking device 10 together with the hinge member H. Even when a pressure of 10 mm is applied, the pressure can be distributed to a plurality of locking points by the locking device 10 together with the hinge member H, so that the load can be reduced. D can be securely tightened.

  In this structure 1, a guide plate 23 is provided on each slide member 18 on the inner surface of the door D, a plurality of guide holes G0 are formed on the guide plate 23, and a plurality of guide pins G1 are provided on the inner surface of the door D. Thus, the sliding direction of each slide member 18 is guided, and each dart hole 19 of the slide member 18 is guided to a position where it can be engaged with and disengaged from each locking pin 11 and a position where it can be locked. 18 can be slid smoothly, and each of the holes 19 and the locking pins 11 can be engaged and disengaged and locked smoothly and reliably. In this case, a guide plate 23 having a plurality of guide holes G0 is provided on the slide member 18 and a plurality of guide pins G1 are provided on the inner surface of the door D. Conversely, a plurality of guide holes are provided on the inner surface of the door D. A guide plate having a plurality of guide pins may be provided on the slide member 18, and similar effects can be obtained in this way.

(A) Plan sectional view of the door tightening structure in one embodiment of the present invention (b) Side sectional view of the structure (c) Front sectional view of the structure (A) Partially enlarged side sectional view of the same structure (b) Partially enlarged front sectional view of the same structure (A) Partially enlarged side sectional view of the same structure (b) Partially enlarged front sectional view of the same structure Partially enlarged side sectional view of the structure Partially enlarged side sectional view showing an operation example of the same structure Partially omitted front sectional view showing an operation example of the same structure Partially enlarged side sectional view showing an operation example of the same structure Partially omitted front sectional view showing an operation example of the same structure

Explanation of symbols

1 Door Tightening Structure 10 Locking Device 11 Locking Pin 12 (End) Flange 13 (Intermediate) Flange 14 Locking Groove 15 Screw 16 Washer 17 Nut 18 Slide Member 19 Darling Hole 20 Large Hole 21 Small Hole 22 Slide Plate 23 Guide Plate 24 Crank member 25 Pivoting pin 26 Connecting pin 27 Handle (lock handle device)
28 Handle 29 Locking shaft 30 Pinion 31 Rack D Door DF Cylindrical part DF2 Door inner left side DF3 Door inner upper part DF4 Door inner lower part DF5 Outer left inner side DF6 Outer outer upper inner side DF7 Outer outer lower inner side DF8 Frame pair Contact surface left side DF81 Frame contact surface left inner surface DF9 Frame contact surface upper side surface DF91 Frame contact surface upper inner surface DF10 Frame contact surface lower side surface DF101 Frame contact surface lower inner surface DF0 Pin insertion hole G0 Guide hole G1 Guide pin B Housing F Fixed frame F2 Left side surface F3 Upper side surface F4 Lower side surface F0 Pin mounting hole H Hinge member

Claims (2)

A door that comes into contact with a large pressure due to an increase in pressure inside the housing, and one side of the door is pivotally connected to one side of the housing via a hinge member, and the door and the housing In the door tightening structure for tightening the door to the housing by a locking device provided between
The locking device is
Peripheral surfaces that are arranged at appropriate intervals in the vertical and horizontal directions along the other vertical and horizontal parts of the casing that are not connected by the hinge member, and project toward the door. A plurality of locking pins each having a locking groove;
It is installed on the inner surface of the door so as to be slidable in the vertical direction and the horizontal direction along the vertical and horizontal parts facing the other parts of the housing, and the locking pins can be inserted therethrough. A plurality of sliding members each having a large hole and a small hole in which the locking groove can be continuously inserted are formed at intervals corresponding to the locking pins, and the vertical and horizontal directions. It is rotatably installed between mutually adjacent end portions of each part, and one is connected to the vertical slide member and the other is connected to the horizontal slide member so that the vertical direction and the horizontal direction are connected. A plurality of crank members that connect the slide members of
Provided on the outer surface of the door and operatively connected to the vertical slide member or the horizontal slide member to linearly drive the vertical slide member or the horizontal slide member vertically or horizontally. A handle,
With
By operating the handle, the slide members in the vertical direction and the horizontal direction can be engaged with and disengaged from the respective locking pins with the large holes of the respective dart holes matching the respective locking pins, Each small pin engages with a locking groove of each locking pin from a state in which each locking pin is inserted into a large hole of each dart hole, and each locking pin is arranged on the periphery of each small hole. Are interlocked and slid between positions that can be locked, and each door hole and each locking pin are engaged and disengaged, and configured to lock and unlock the door,
A door tightening structure characterized by that.   A plurality of guide holes formed in one of the slide members or doors in a length substantially equal to the slide distance of the slide members in the sliding direction of the slide members, and the other through the guide holes. A plurality of guide pins provided so as to be engageable with each other, guide the slide member in the sliding direction, and place each dart hole of the slide member in a position where it can be engaged with and disengaged from the lock pin. The door tightening structure according to claim 1, further comprising a slide guide for guiding.

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