JPH07293698A - Opening/closing mechanism of heavy door - Google Patents

Abstract

PURPOSE:To conduct continuously by means of extremely small power all the opening/ closing operations of the turning of an anti-pressure door, the clamping/unclamping of a clamp, and the ascent/descent of the pressure resistant door with a standing posture holding one stick handle kept on in regard to the pressure resistant door and regardless of the outside/inside of the pressure resistant door, by ascending the hinge type pressure resistant door by human power and turning it for opening/closing. CONSTITUTION:A compressive coil spring 14 having spring force that balances with the total weight of a pressure resistant door 3 is put on a hinge shaft 10, and arms 19 connected to the heavy door 3 are mounted on it, and the weight of the pressure resistant door 3 is supported. A bell crank 22 whose one end is engaged with a pin 18 projectingly provided at the hinge shaft 10, is turnably shaft-supported on the pressure resistant door 3, and a handle rod 31 to turn the bell crank 22 is turnably shaft- supported on the pressure resistant door 3, and also a roller shaft 32 to be engaged/ disengaged with a clamp gate 38 in linkage with the turning movement of the handle rod 31 is provided. By the turning movement operation of the handle rod 31, the ascent/descent of the pressure resistant door 3, clamp operation and the ascent/descent of a lid plate 41 are linked mutually.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for opening and closing a heavy door such as a pressure door in a pressure vessel.

[0002]

2. Description of the Related Art In diving work and underground construction, people are exposed to higher atmospheric pressure than usual. In addition, there are medical procedures that apply high atmospheric pressure to the human body for medical purposes. In any of these cases, people enter and leave a structure that maintains the atmospheric pressure under high pressure, mainly a metal pressure-resistant container called a high pressure tank.

This high pressure tank (hereinafter abbreviated as tank) is provided with a pressure resistant door for entering and exiting or passing therethrough, and each of them has a strength corresponding to the strength capable of withstanding the atmospheric pressure applied thereto. Is manufactured in.

As shown in FIG. 11, a typical one of the pressure resistant doors is a combing 2 which forms an entrance / exit of a tank 1.
The pressure-resistant door 3 is rotated inside by a hinge or is slid sideways in a sliding door manner to open and close. The opening / closing operation of the pressure resistant door 3 may be performed manually or by using power such as hydraulic pressure.

The shape and dimensions of the pressure resistant door 3 are almost the same as those of a normal building door, but because of the pressure resistance in the thickness direction, a reinforcing frame is assembled or a thick steel plate is used. It is used as it is. In any case, the weight is 300 ~
It is generally quite heavy at 500 kg. Also, pressure resistant door 3
In order to maintain the atmospheric pressure in the tank 1, a seal packing 5 (see FIG. 14) that works with the end surface of the combing 2 is used for the above. Unlike normal building doors, there is a structure that allows the pressure-proof door 3 to be sealed with the seal packing 5 when it is closed, that is, a clamp operation for pressing the pressure-proof door 3 to bring it into close contact with the end face of the combing 2. is necessary.

When the pressure-resistant door 3 is hinged,
When the pressure door 3 is opened and the tank 1 is moved in and out, as shown in FIG.
As shown in FIGS. 13 and 14, the floor surface 4 in the tank 1 is located at a position further lower than the lower end of the pressure resistant door 3, and a step h is formed. Therefore, although a person can get over this step h, You cannot pass a trolley, stretcher, wheelchair, etc.

Therefore, as shown in FIG. 15, when passing the truck 6 or the like, a pair of slopes 7 bridging the combing upper surface 2a parallel to the floor surface 4 are provided on the floor surface 4 and the floor surface 4a outside the tank 1. It will be placed in each. However, each time the truck 6 is moved in and out, the slope 7
Is required, and when the pressure-resistant door 3 is closed, it is inconvenient to remove it.

Therefore, except for such inconvenience, the heights of the entrance / exit floor surfaces 4 and 4a and the combing top surface 2a are set to be the same plane, and the pressure resistant door is provided so as to facilitate the passage of the dolly 6 and the entry and exit of people. It has been proposed that the pressure-resistant door 3 can be opened and closed by a hinge by raising the pressure-resistant door by a height corresponding to a space for effectively using the seal packing 5 at the lower edge of the pressure-resistant door 3 (Japanese Utility Model Application No. 59-104959). (Hereinafter abbreviated as known examples).

[0009]

However, according to the above-mentioned known example, there are the following inconveniences. The pressure door 3 that allows a person to walk in and out while standing is generally 2 kg of working pressure.
The weight of 300 to 500 kg or more will be obtained as well. In addition, the inner diameter of the tank 1 is often set to the minimum size necessary for passage or stay of a person, and the space around the pressure door 3 is generally extremely narrow. Therefore, in order to manually raise the pressure-resistant door 3 having the above weight, it is necessary to increase the gear reduction ratio and the handle to be operated, but it is necessary to install the device in a place where space is limited.
In addition, it is practically difficult to perform the raising operation. Even if the device could be incorporated, it is completely unsuitable for the treatment of doctors and nurses, especially in the case of medical tanks.

Further, in the high-pressure tank, it is generally required that the pressure-resistant door 3 can be opened / closed both inside and outside, in consideration of the response in a normal emergency. The known example does not take this into consideration. In order to operate the lifting device of the known example from the inside and outside, a through shaft is provided in the space beside the pressure door 3, but the through shaft is sealed in the presence of a pressure difference between the inside and outside, and this is continuously rotated. That is, the magnitude of the frictional resistance force of the seal portion is added to the labor at the time of opening / closing operation, which makes it more difficult. In everyday use, requiring such labor every time the pressure-resistant door 3 is opened and closed is unbearable for practical use.

In addition, after turning the pressure door 3 to the closed position,
To raise the atmospheric pressure, the pressure resistant door 3 must be clamped so that the seal packing 5 works. In the known example, a clamp metal fitting is arranged around the pressure-resistant door 3, and the clamp metal fitting is individually tightened, which makes the operation complicated. Further, it is difficult to perform the clamp operation at the elevating operation position, and the position must be changed.

In view of the above circumstances, therefore, the present invention is the same as a publicly known one in which a hinge-type pressure-resistant door is lifted by human power and turned to open and close, and the opening / closing operation is performed inside or outside the pressure-resistant door. Instead, all the opening and closing operations of lifting and lowering the pressure resistant door, unclamping and unfastening the clamp, and turning the pressure resistant door can be performed continuously with a very small force while maintaining a standing posture in which one bar handle is held against the pressure resistant door. The purpose is to be able to do.

[0013]

In order to achieve the above-mentioned object, the present invention is designed such that a compressible coil spring having a spring force that balances the total weight of a heavy door is fitted on a hinge shaft and a heavy door is mounted on the hinge shaft. A linked arm is placed to support the weight of the pressure-resistant door, and a bell crank whose one end engages with a pin protruding from the hinge shaft is rotatably supported on the weight door, and a handle rod for rotating the bell crank. Rotatably pivots on the heavy door, and
A roller shaft that engages with and disengages from the clamp gate is provided in association with the rotation of the handle rod.

[0014]

[Operation] When the handle rod is rotated, the bell crank is rotated to raise and lower the weight door which is floated by spring force.
The roller shaft works together to clamp and release the heavy door.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which the present invention is applied to a tank will be described below with reference to the drawings. Description will be given by using the same reference numerals for parts common to the known example with reference to FIGS. A pressure resistant door 3 as a heavy door is pivotally attached to one side of the combing 2 of the tank 1 via a hinge shaft 10 so as to be freely opened and closed. The hinge shaft 10 is made of a square steel rod having a predetermined length, and the bearing 11 is rotatably inserted in a cylindrical shape in the vicinity of its upper end and lower end.
Moreover, the thrust bearing 12 is arranged at the lower end. The bearing 11 and the thrust bearing 12 are fixedly supported by the tank 1.

A spring seat 13 is fixed to the hinge shaft 10,
A coil spring 14 is fitted and inserted upward from the spring seat 13.
A spacer 16 is fitted over the coil spring 14 with a washer 15 interposed. The spacer 16 has an elongated hole 17 in the axial direction.
Is provided, and the pin 18 is fitted into the elongated hole 17.
The pin 18 is embedded in the hinge shaft 10. The coil spring 14 is a compression spring having a capacity that balances the total weight of the pressure door 3.

Arms 1 are provided on the upper and lower sides of one side of the pressure door 3, respectively.
9, the arms 19 are extended to the hinge shaft 10, and rollers 20 and pins 21 sandwiching the hinge shaft 10 are provided at respective ends. The roller 20 is in sliding contact with the flat surface of the hinge shaft 10 and is rotatable. The upper end of the spacer 16 is brought into contact with the upper arm 19.

A pin 18 protruding from the long hole 17 of the spacer 16
As shown in FIGS. 3 and 4, the U-shaped groove 22a of the bell crank 22 is engaged with the bell crank 22.
It is rotatably supported by. One end of a connecting rod 24 is rotatably connected to the other end of the bell crank 22 by a shaft 25, and the other end of the connecting rod 24 extends to the other side of the pressure door 3 and has a pin 26 at the other end. Is projected. This pin 2
Reference numeral 6 is engaged with a guide groove 28 formed in a guide plate 27 fixed to the pressure resistant door 3 (see FIG. 8).

At the lower part of the guide plate 27, a through shaft 29 penetrates the pressure-proof door 3 and is rotatably provided with inner and outer sealing properties through a sealing means such as an O-ring. A handle rod 31 is orthogonally connected to both ends of the through shaft 29 at inner and outer symmetrical positions. The inner through shaft 29 has an angle of about 120 degrees with the handle rod 31 and has a predetermined length.
Two are connected orthogonally. A roller 33 is rotatably supported at the end of the roller shaft 32.

A clamp gate 38 for engaging and disengaging the roller 33.
Is fixed to the side surface of the combing 2 via a rod 39 having a predetermined length and a mounting plate 40. The rod 39 holds the clamp gate 38 so as to project from the end surface of the combing 2 and beyond one surface of the pressure resistant door 3. Clamp gate 38
The roller 33 has a slope surface 38a for pressing the pressure resistant door 3 against the combing 2 by climbing while rotating and releasing the pressing by descending.

Further, the through shaft 29 has a substantially fan-shaped cam plate 3.
4 are fixed orthogonally. The cam plate 34 is shown in FIGS.
As shown in FIG. 5, the circular arc portion 35 that slidably contacts the pin 26 and the U groove 36 and the pin 26 that engage with the pin 26 near one end thereof.
A hook portion 37 that abuts on is formed. Arc part 35
As shown in FIG. 8, is slidably abutted on the pin 26 that engages with the guide groove 28 between the connecting rod 24 and the guide plate 27.

On the other hand, the floor surface 4 of the tank 1 is flush with the upper surface 2a of the combing 2, and the floor surface 4 below the pressure door 3 has an opening 4a through which the pressure door 3 moves up and down.
Has been established. A lid plate 41 having a T-shaped cross section for closing the opening 4a is supported by a pair of links 42 and is vertically movable. Link 42 is bracket 4
The table 43 is rotatably supported by a table 43 supported by the tank 1.

In order to move the lid plate 41 up and down, as shown in FIG. 9, a crank 45 is fitted and fixed to the lower end portion of the hinge shaft 10, and one end of a connecting rod 46 is rotatably connected to the crank 45 and is connected. The other end of the rod 46 is rotatably connected to one of the links 42. Therefore, when the hinge shaft 10 is rotated, the crank 45 is rotated to push or pull the connecting rod 46, and in conjunction with the opening / closing operation of the pressure resistant door 3, the lid plate 41 opens or closes the opening 4a. be able to.

Further, when the handle rod 31 is in the vertical state, the state is locked so that the handle rod 31 does not fall accidentally. Therefore, as shown in FIG.
On the rotational direction side of 2, the latch 47 is swingably fixed to a bracket 48 fixed to the pressure resistant door 3 via a shaft 49, and a stopper 53 with which the roller shaft 32 contacts is fixed to the pressure resistant door 3.

That is, as shown in FIG.
A detection pin 50 that is embedded in the pressure resistant door 3 so as to be able to move forward and backward abuts on one end side of 7, and a plunger 53 that is biased by a spring 51 embedded in the pressure resistant door 3 is abutted on the other end side. The stopper 53 is a protrusion 32a fixed to the roller shaft 32.
Are formed to contact with each other. The detection pin 50 is arranged outside the seal packing 5.

Therefore, when the pressure-resistant door 3 is opened, the spring 51 acts and the latch 47 is tilted about the shaft 49 so that the stopper 53 side is always higher so that the projection 32a is pinched together with the stopper 53 and does not move. To However, when the pressure-resistant door 3 comes into contact with the end surface of the combing 2, the detection pin 50 pushes up the latch 47 against the force of the spring 51 and rotates it as shown by an imaginary line, so that the latch 47 is stepped by the step portion. Projection 3
2a can move in the direction of the arrow.

Next, the opening / closing operation of the pressure resistant door 3 will be described. The state shown by the solid line in FIG. 1 is a state in which the pressure resistant door is closed. Therefore, when the handle rod 31 in the horizontal position is rotated counterclockwise (arrow A) to rotate the penetrating shaft 29, the cam plate 3 is rotated.
Both 4 and the roller shaft 32 rotate in the same direction.

Therefore, in FIG. 1, the handle rod 3
As shown in FIG. 7, the cam 34 moves from the horizontal state to the arc portion 3 until the desired angle θ ₁ (about 50 degrees) is raised.
5 is rotated clockwise while the pin 26 is in sliding contact with
As shown in, the pin 26 falls into the U-groove 36 at the stage of turning by the angle θ ₁ , and the hook portion 37 abuts on the pin 26.
The handle rod 31 exceeds the angle θ ₁ , and the angle θ ₂ (about 40 degrees)
When is rotated to be in the vertical state, the hook portion 37 forcibly moves the pin 26 from one end of the guide groove 28 to the other end thereof, as shown in FIG.

By this operation, the connecting rod 24 is moved to the guide plate 27.
Pulled to the side, the bell crank 22 tries to rotate counterclockwise about the shaft 23. However, since one end of the bell crank 22 is supported by the shaft 18 of the hinge shaft 10 in the fixed position, the entire bell crank 22 rotates counterclockwise about the shaft 18 (from the phantom line in FIG. 3). (State shown by solid line). Therefore, the pressure door 3 is shown in FIG.
The opening 4a in FIG. 2 rises to the position shown by the phantom line.
Will be exposed.

Further, as the handle rod 31 rotates by an angle θ ₁ , the roller 33 of the roller shaft 32 causes the slope 38a.
The roller 33 is disengaged from the clamp gate 38 while the pressure-resistant door 3 is released from being pressed against the combing 2 by sliding down. Then, the roller shaft 32 pushes in the latch 47, abuts against the stopper 52 and is locked, and the handle rod 31
Will not fall carelessly.

Therefore, the handle rod 31 is pulled toward the front and the pressure resistant door 3 is swung about the hinge shaft 10 to open the combing 2. At this time, since the total weight of the pressure-resistant door 3 is supported by the force of the coil spring 14, the operating force for opening is the same as that of a normal building door.

When the pressure-resistant door 3 is opened, the hinge shaft 10 rotates in the direction of arrow C in FIG. 9, the crank 45 rotates in the same direction, and the connecting rod 46 is pulled to raise the link 42. The lid plate 41 rises to the same plane as the opening 4a. Therefore, the opening 4a does not hinder walking or traveling of a dolly or the like.

Next, when the pressure-resistant door 3 is closed, the pressure-resistant door 3 is swung around the hinge shaft 10 toward the combing 2 side through the handle rod 31, and when the pressure-resistant door 3 comes into contact with the end surface of the combing 2, The detection pin 50 rotates the latch 47 against the force of the spring 51, and the roller shaft 32 becomes rotatable.

Therefore, when the handle rod 31 is tilted from the vertical state by the angle θ ₂ (direction B in FIG. 1), the cam plate 34 is moved to the position shown in FIG.
6 to rotate counterclockwise as shown in FIG.
Is moved from the other end of the guide groove 28 to one end, and the connecting rod 24
Moves to the hinge shaft 10 side. As a result, the bell crank 22 tries to rotate clockwise about the shaft 23, but the bell crank 22 is rotated by the shaft 1 via the fixed shaft 18.
Since it rotates clockwise about 8 as a center, the pressure resistant door 3 descends from the state shown by the phantom line in FIG. 1 to the state shown by the solid line.

At this time, the roller 33 of the roller shaft 32 engages with the clamp gate 38, but does not climb the slope 38a. Therefore, as shown in FIGS. 6 to 7, when the handle rod 31 is further tilted by the angle θ ₁ , the roller 33 begins to climb the slope 38a, and the roller 33 moves the slope 38a in a state where the handle rod 31 is substantially horizontal. After climbing, the pressure resistant door 3 is pressed against the end surface of the combing 2. At this time, the arc portion 35 of the cam plate 34 comes into contact with and slides on the pin 26, so that the pin 26 does not move carelessly.

When the pressure-resistant door 3 is closed, the hinge shaft 10 is rotated in the opposite direction to rotate the crank 45, the connecting rod 46 is pushed to bring down the link 42, and the cover plate 41 is opened from the opening 4a. When the pressure-resistant door 3 is lowered, the lower end portion of the pressure-resistant door 3 is opened 4a.
Does not prevent you from moving in.

When the pressure-resistant door 3 is pressed against the end surface of the combing 2, the pressing force gradually increases from the hinge shaft 10 side to the clamp gate 38 side, so that the seal packing 5 is smoothly moved along the embedded groove. The seal performance is not deteriorated by floating or bending from the groove.

Thus, by opening / closing the pressure-resistant door 3 via the handle rod 31, three operations of raising / lowering the pressure-resistant door 3, clamping operation, and raising / lowering the lid plate 41 can be performed in one operation. Moreover, when the pressure door 3 is opened, the opening 4a is formed in the floor surface 4, but the opening 4a is not closed by the cover plate 41 to form a groove. It will not hinder driving.

In the above embodiment, the pressure resistant door of the pressure resistant container is taken as an example, but the invention is not limited to this, and it can be used as an opening / closing mechanism for other warehouses such as frozen warehouses and heavy special doors. is there.

[0040]

According to the present invention described above, three operations of lifting and lowering the pressure door and clamping operation and lifting and lowering of the cover plate are performed in conjunction with the opening and closing operation of the pressure door through the handle rod. You can

Moreover, when the pressure door is opened, an opening is formed on the floor surface, but the opening is not closed by the cover plate to form a groove, and therefore, it is suitable for walking or running of a dolly or the like. There is no obstacle.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a partial front view of FIG.

FIG. 4 is a partial cross-sectional plan view of FIG.

5 is a partial front view of FIG.

6 is an explanatory view of the operation of FIG.

7 is an explanatory view of the operation of FIG.

FIG. 8 is a partial plan view of FIG.

9 is a partial plan view of FIG.

10 is a cross-sectional view taken along the line AA of FIG.

FIG. 11 is a perspective view showing a tank.

FIG. 12 is a front view of the tank.

FIG. 13 is a side view of the end surface of the tank.

FIG. 14 is an enlarged view of part B of FIG.

FIG. 15 is an explanatory view of the action of the truck moving in and out of the tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Tank 2 ... Coming 3 ... Pressure resistant door (heavy door) 5 ... Seal packing 10 ... Hinge shaft 11 ... Bearing 12 ... Thrust bearing 13 ... Spring seat 14 ... Coil spring 17 ... Long hole 18, 21 ... Pin 19 ... Arm 20 ... Roller 22 ... Bell crank 24 ... Connecting rod 27 ... Guide plate 28 ... Guide groove 29 ... Penetration shaft 31 ... Handle rod 32 ... Roller shaft 33 ... Roller 34 ... Cam plate 35 ... Arc portion 36 ... U groove 37 ... Claw portion 38 ... Clamp gate 41 ... Lid plate 42 ... Link 45 ... Crank 46 ... Connecting rod 47 ... Latch 53 ... Stopper

Claims (5)

[Claims] 1. A hinged shaft is fitted with a compressible coil spring having a spring force that balances the total weight of a heavy door, and an arm connected to the heavy door is mounted thereon to support the weight of the pressure resistant door. A bell crank, one end of which engages with a pin protruding from the shaft, is rotatably supported on the heavy door, and a handle rod for rotating the bell crank is rotatably supported on the heavy door, and An opening / closing mechanism for a heavy door, which is provided with a roller shaft that engages and disengages with the clamp gate in conjunction with the rotation of the handle rod. 2. A hinge shaft rotatably supported to the side of an entrance / exit through a bearing including a thrust bearing, and a lower end abutting a spring seat fixed to the hinge shaft and fitted into the hinge shaft. A compressible coil spring whose upper end abuts on a spacer fitted to the hinge shaft and has a spring force that balances the total weight of the heavy door, and a hinge shaft which abuts on the spacer and is capable of moving up and down the hinge shaft. And an arm connected to the weight door so that the hinge shaft can be moved up and down below the spring seat in a pair with the arm and a pin fixed to the hinge shaft to engage with the heavy door. A bell crank that is movably supported, and a handle rod that is rotatably connected to the weight door by being rotatably connected to the other end of a connecting rod whose one end is rotatably connected to the bell crank, A means for pressing the heavy door against the doorway in conjunction with the handle rod. A heavy door opening / closing mechanism characterized by 3. A hinge shaft rotatably supported to the side of the doorway through a bearing including a thrust bearing, and a spring seat fixed to the hinge shaft has its lower end abutted and fitted into the hinge shaft. A compressible coil spring whose upper end abuts on a spacer fitted to the hinge shaft and has a spring force that balances the total weight of the heavy door, and a hinge shaft which abuts on the spacer and is capable of moving up and down the hinge shaft. And an arm connected to the weight door so that the hinge shaft can be moved up and down below the spring seat in a pair with the arm and a pin fixed to the hinge shaft to engage with the heavy door. A guide fixed to a heavy door having a bell crank movably supported and a guide groove engaged with a pin protruding from the other end of a connecting rod whose one end is rotatably connected to the bell crank. Plate and a penetrating shaft rotatably supported through the heavy door near the guide plate A handle plate and a roller shaft connected orthogonally to the penetrating shaft, and a cam plate for moving the pin along a guide groove, an arc portion and a claw portion formed on the cam plate, and the hinge shaft. An opening / closing mechanism for a heavy door, comprising: a clamp gate fixed to the side of the doorway facing each other and with which the roller shaft engages and disengages. 4. An opening for raising and lowering a weight door is provided with the floor surface of the entrance and exit being flush with the inside and outside, and a pair of links are swingably supported on an appropriate platform below the opening, and the link is A lid plate that closes the opening is rotatably connected to the upper end to form a parallel link, and one end of a connecting rod is rotatably connected to one of the links, and the other end of the connecting rod is formed. The opening / closing mechanism for the heavy door according to claim 1, wherein the crank is rotatably connected to a crank fixed to the hinge shaft. 5. The doorway is a pressure-resistant container combing, and the heavy door is a pressure-resistant door.
The heavy-duty door opening / closing mechanism described in 3 or 4.