JPH084445A - Airtightness holding device for door - Google Patents

Abstract

PURPOSE:To allow airtightness to be held positively by performing lead-in toward the inside of a door by the compressive energy accumulation of a compression coil spring caused at the time of closing a door and the compressive energy accumulation of the compression coil spring by the action of a door air lock in the lock release direction. CONSTITUTION:At the time of closing a door D, a first rod is placed in the state of being most drawn to the operating rod 20 side, and a second rod 60 is placed in the state of being pushed in by a longitudinal frame 1. In addition, the rod part end of the connecting rod 70 of the second rod 60 is placed in the state of being pushed downward, and the engaging collar 23 of the operating rod 20 is placed in the state of coming in contact with the inclined face of a stopper part 45. Airtight material 91 is pushed in such a way as to come in contact with the face of a floor 2 by the connecting rod 70 while receiving energizing force so as to be elastically held by compression coil springs 67, 110. When an air lock C is turned, the operating rod 20 is pushed down against the energization of the compression coil spring 22. The engaging collar 23 is engaged with the stopper part 45 against the energization of the coil spring 22 so as to inhibit the upward return of the operating rod 20 to maintain the pressing state to the first rod 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention closes a gap formed between a door provided at a doorway or a lower end of a door used as a partitioning means and a floor surface when closing the door. Accordingly, the present invention relates to the provision of a door airtightness holding device for preventing the inflow and outflow of cold and warm air, or blocking light, sound, odor, etc. to prevent inflow and outflow of dust and the like, and enhancing the fireproof function.

[0002]

2. Description of the Related Art It is common to create a gap between a lower end of a door and a floor surface, which is usually caused by the gap. It is generally done to provide a so-called slipper, which is formed by projecting a door contact portion that contacts the lower end of the door on the floor surface where the door is tightened.

However, this kind of means for providing the door stop portion causes a step on the floor surface, and the step generated at the door stop portion often interferes with daily life. Or it is inconvenient for people with physical disabilities who have difficulty walking.

From this point of view, a door stop is not provided in a portion to be fastened to the door, the floor surface at the fastening position of the door is made a flat surface, and the lower portion of the door is projected downward from the door. There has been proposed an airtight holding device for a door, which is provided with a shielding means and is configured such that the shielding means projects toward the floor when the door is tightened.

An example of this type of door airtightness holding device is a door airtightness device disclosed in Japanese Utility Model Laid-Open No. 63-1192. The airtight device for a door disclosed in Japanese Utility Model Laid-Open No. 63-1192 has a sealing member as a shielding means for a movable member assembled to the lower part of the door so as to be movable in the vertical direction. In addition to being provided, the movable member is configured to be engaged with a leaf spring equipped in the door, and the leaf spring is bent downward by the pressing action of the pressure receiving rod protruding from the side surface on the suspension base side of the door. Thus, the movable member is pushed downward.

[0006]

However, in the airtight device for a door disclosed in Japanese Utility Model Laid-Open No. 63-1192, the vertical movement of the movable member provided with the seal member causes the leaf spring to bend. Also, since the return action of the bent plate spring is used, a plate having strong elasticity is provided so that the movable member can be reliably and smoothly drawn into the door when the door is opened. It is necessary to use a spring, and as a result, it is required that the leaf spring having this strong elasticity be sufficiently bent when the door is tightened against the elasticity of the leaf spring. It is expected to cause difficulties.

From this point of view, when the airtight device for the door is formed by using the leaf spring having elasticity suitable for pulling back upward of the movable member, it is possible to smoothly pull back the movable member when the door is opened. It is difficult to do this, and it is expected that the settling operation of the leaf spring toward the inside of the door will be difficult due to the fatigue of the leaf spring over time.

In view of the inconvenience in the conventional airtight device for a door, the present invention relates to the retracting of the shielding means toward the inside of the door when the door is opened, and the compression and accumulation of the compression coil spring generated when the door is closed, and An object of the present invention is to provide an airtight holding device for a door, which is surely formed by compression and storage of a compression coil spring by an operation of an unlocking direction of an empty lock in a door.

[0009]

The airtightness maintaining apparatus for a door according to the present invention is provided with the constitution in the door D in order to achieve the above-mentioned object, and the front end side is always from the side surface of the door D. An urging operation means includes a rod member E that is urged to protrude outward and is configured such that a protruding portion from the door D is pushed back into the door D when the door D is closed. A, a rod member provided below the door D and protruding downward toward the door D as the rod member E is pushed back into the door D by the urging operation means A. Shielding means B that is drawn into the door D when E is ejected from the door D
An airtightness holding device for a door, comprising: an empty lock C provided on the door D when the door D is tightened.
The airtightness maintaining device for a door in which the urging force of the urging operation unit A in the rod member E in the protruding direction is increased with the operation toward the unlocking direction.

[0010]

The airtightness retaining device for the constructed door is urged so that the tip end side always protrudes outward from the side surface of the door D, and the protrusion from the door D is caused by the door tightening operation. The urging operation means A includes a rod member E configured to be pushed back into the door D, and the rod member E is pulled into the door D when the rod member E is ejected from the door D, and the rod The door D is configured to include a shielding means B that protrudes downward with the push-back operation of the member E toward the inside of the door D.
When the door is closed, the urging force of the urging in the protruding direction of the rod member E is stored along with the operation of the empty lock C provided in the door D in the unlocking direction. Therefore, the initial urging force provided to the rod member E in the urging operation means A and the urging force provided to the rod member E in accordance with the operation of the empty lock C in the unlocking direction are: It acts as a force to pull the shielding means B back into the door D.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A typical embodiment of a door airtight holding device according to the present invention will be described in detail below. FIG. 1 shows a door D provided with the airtightness maintaining device and a main part of an opening portion for mounting the door, and shows a floor 2 portion in the opening portion and a lower portion of the door D in a cutaway manner. In FIG. 2, the door portion is omitted so that the main parts of the components of the airtightness maintaining device can be easily understood, and a part of the parts incorporated in the door D is cut away. FIG. 3 shows a part of components forming the empty lock C so that the empty lock C portion of the door D can be easily understood, and the top side of the operation rod 20 actuated by the empty lock C. 4 to 8 show a lower portion of the door D, a mounting opening portion of the door D, and a part of the floor 2 surface in a cutaway manner, and a pressing plate 7 attached to the square core 8 of the empty lock C. In order to make it easier to understand the operation rod 20 pushed downward by this, this is shown regardless of the fracture surface of the door D. In FIG. 4, the door D is closed, and in FIG. In FIG. 6, the state where the rotation of the empty lock C is started prior to opening the door D, the empty lock C is rotated so that the door D can be opened, and the opening of the door D is performed. The state before starting is shown. Next, FIGS. 7 and 8 show the state in which the door D is opened, and in FIG. 7, the state immediately after the rod member E of the urging operation means A is projected from the door D is shown. 8 shows a state in which the operation rod 20 is pushed back upward following the protrusion of the rod member E of the biasing operation means A.

The airtightness retaining device used here is generally used as a door provided at a doorway portion of a building such as an entrance or a so-called hinged door such as a door functioning as a partition for partitioning individual living space portions. Proposed. Therefore, the configuration of the floor surface or the configuration of the vertical frame differs depending on the assembly components such as the building in which the door D is provided. In the illustrated example, it is assumed that any of these cases is intended, and the door mounting opening is simply used. It is shown as a vertical frame 1 and a floor 2 of the part.

The blank lock C used here may be a blank lock C having any structure such as a box blank lock, a cylindrical blank lock, etc. in addition to the typical lever handle blank lock shown in the drawing. When opening and closing the door D, it is preferable to use a structure having a handle or a knob portion.

First, a typical door D is assembled so that it can be opened and closed by hinges 4 and 4 with respect to a vertical frame 1 provided at an opening portion provided in a wall 3, and a mounting side by the hinge 4 is attached. An empty lock C, in this case, a lever-handle type empty lock C is provided on the opposite side, and a strike of this empty lock C is provided on the vertical frame 1 in front of the protruding position of the latch bolt of this empty lock C. ing. Incidentally, the portion shown as the floor 2 may be configured as a slipper in some cases.
It is configured according to the configuration contents of the installation opening part of.

For the purpose of facilitating the assembling of the airtight holding device to the door D, an operation box 10 having a lower surface opening to be incorporated inside the lower side of the door D is prepared, and the rod member E is provided in the operation box 10. The urging operation means A and the shielding means B are assembled, and the operation rod 20 for urging the rod member E of the urging operation means A toward the protruding side by turning the lever handle 6 of the empty lock C is installed. It is provided so as to stand upright from the operation box 10 toward the empty lock C.

The urging operation means A incorporated in the operation box 10 is composed of a rod member E and components attached to the rod member E, and the rod member E substantially extends in the width direction of the door D. The door contact portion 61 is provided in a horizontal direction and protrudes from the hinged side of the door D. The protruding hole 11 of the door contact portion 61 has the operation box 1
0, and the side surface of the door D is provided with a hole 9 through which the door contact portion 61 projects.

The rod member E constituting the urging operation means A is provided with a first rod 50 mounted to be axially supported by a rod receiver 100 so as to be movable laterally in the operation box 10. A second rod 60, which is on the same axis as the first rod 50 and is axially supported by the rod receiver 101 so as to be movable in the lateral direction similarly to the first rod 50, is provided. Then, the fitting insertion hole 63 formed at one end of the second rod 60
The slender rod portion 52 at one end of the first rod 50 is slidably inserted into the first rod 50 and the second rod 50 and the second rod 50.
A compression coil spring 110 is interposed between the rod 60 and, particularly, the small diameter rod portion 52, and both ends of the compression coil spring 110 are provided on the opening surface of the fitting insertion hole 63 of the second rod 60 and the first rod 50. The contact is made between the small-diameter rod portion 52 and the large-diameter rod portion, and the first rod 50 and the second rod 60 are constantly urged toward the side away from each other.

Next, the shaft pin 51 at the side end portion of the first rod 50 on the side opposite to the side where the second rod 60 is fitted is attached to the operation box 10 so as to be rotatable at the bending point. Insert and engage with an elongated slide hole 31 provided in one end 30a of the rod 30 having a character shape, and operate with respect to an elongated slide hole 32 provided in an end 30b of the other rod of the communication rod 30. Rod 2
The shaft pin 21 projecting from the side surface of 0 is inserted and engaged.
The connecting rod 30 has a shaft member 33 serving as a fulcrum of rotation thereof.
Is attached to the operating side of the operating rod 20, that is,
The rod end 3 is located on the upper side of the operation box 10 and is provided with slide holes 31 and 32 from this rotation fulcrum.
The so-called L-shaped connecting rod 30 is attached so that the back side faces upward and the inside faces downward so that the portions 0a and 30b face downward. In addition, the slide hole 31,
Reference numeral 32 is prepared as having a length such that the connecting rod 30 can rotate about the shaft member 33 as a rotation fulcrum.

The second rod 60 corresponds to the first rod 5
A shaft rod 62 of a door-stop member having a door-stop portion 61 is provided on the same axis as the second rod 60 at a portion opposite to the side where the shaft rod 62 is continuously connected, and the shaft rod 62 is slidably inserted. And a pin 65 for preventing the shaft rod 62 inserted into the fitting and insertion hole 64 from coming off.
An elongated slide hole 66, which is engaged with the pin 65 in a protruding manner, is transparently provided toward the slide hole 64.
A compression coil spring 67 is provided so that the door contact portion 61 of the door contact member slidably inserted into and attached to the second rod 60 protrudes outward from the operation box 10. A door stop portion 61 which is interposed in the shaft rod 62 portion between the rod 60 and the two rods 60, and each end of the compression coil spring 67 projects from the shaft rod 62.
The stepped surface and the opening surface of the fitting insertion hole 64 of the second rod are engaged with each other.

Next, an elevating guide tool 8 having a substantially vertical guide hole 81 as a guide means provided in the operation box 10.
The operation box 10 is provided with the shielding means B so as to be movable in the vertical direction by 0. This shielding means B
Is provided with, for example, an airtight material 91 such as rubber or a rubber-like elastic material that is in contact with the surface of the floor 2 over substantially the entire width of the door D, and is attached in the longitudinal direction of the airtight material 91. Of the pair of rods 9 at substantially symmetrical positions of the metal fittings 92
3 and 93 are rotatably attached, and the ends of the pair of rods 93 and 93 are rotatably attached to shaft pins 82 that are vertically movable with respect to the guide holes 81. There is.

The shielding means B is provided in the operation box 1 described above.
With respect to 0, a substantially L-shaped connecting rod 70 rotatably attached by a shaft member 73 at a bent portion is connected to a rod member E as the biasing operation means A. The connecting rod 70 has an elongated hole 71 at one rod end 70a and a hole 72 at the other rod end 70b. The shaft pin 68 protruding from the side surface of the second rod 60 is inserted and engaged, and the hole 72 on the side of the other rod end 70b is formed.
On the other hand, a shaft pin 82 which is vertically movably attached to the guide hole 81 is inserted and engaged. In addition, this continuous rod 7
0 is assembled so that the bending side, that is, the mounting fulcrum by the shaft member 73 is located on the protruding side of the second rod 60, that is, the side on which the door stop portion 61 is provided. Each of the rod end portions 70a and 70b provided with 72 is configured to face the side opposite to the door contact portion 61. That is, the back side of the L-shaped connecting rod 70 faces the side of the door stop 60, and the inside thereof faces the side on which the operation rod 20 is installed. Incidentally, the holes 71, 72
Is configured such that the connecting rod 70 has a length that allows the connecting rod 70 to rotate about the shaft member 73 as a shaft fulcrum. Further, the guide hole 81 does not hinder the rotation of the connecting rod 70, and has a length sufficient to draw the airtight material 91 in the shielding means B into the door D.

Next, the blank tablet C is operated, and
The operation rod 20 as a means for accumulating an urging force to the rod member E as the urging operation means A is vertically slidable with respect to the operation box 10 and the door D subsequent thereto by a plurality of rod receivers 103. It is assembled freely.
The upper end of the operating rod 20 is attached to the square core 8 of the empty lock C, and can be pushed downward by the pressing plate 7 which is rotated in the vertical direction by the operation of the empty lock C. is there. The operating rod 20 is always biased upward by the compression coil spring 22, that is, toward the pressing plate 7. Further, an engaging flange 23 for a stopper is provided below the operating rod 20 so as to project from the operating rod 20, and the compression coil spring 22 is provided with the engaging flange 23 and the engaging flange. It is interposed between one of the rod receivers 103 below 23 and the engaging collar 23 is pushed upward, that is, the operating rod 20 is urged toward the pressing plate 7. Reference numeral 7a in the drawing denotes a hole into which the square core 8 of the empty tablet C is inserted, and is configured as a square hole 7a suitable for the square core 8 to be inserted and engaged.

A stopper portion 45, which is freely engageable with the engaging collar 23, is provided between the operation rod 20 having the above-mentioned structure and the second rod 60 constituting the biasing operation means A. The stopper means 40 provided on one side is provided so that the other end side of the stopper means 40 is attached to the second rod 60. The stopper means 40 is a stopper that constitutes the stopper means 40.
A rod 41 is provided below the first rod 50 such that the first rod 50 and the stopper rod 41 are parallel to each other, and the stopper rod 41 is oriented in the width direction of the door D. Rod holder 10 so that it can slide
2 is used to support the shaft.

The elongated slide hole 4 is provided at one end of the stopper rod 41, that is, at the side of the second rod 60.
3 is provided, and the shaft pin 42 provided on the rod 46 that is integrally hung from the second rod 60 with respect to the second rod 60 is inserted and engaged with the slide hole 43. However, following the movement of the second rod 60, the second rod 60 can be moved while leaving a sliding play for the slide hole 43. Next, a compression coil spring 44 is attached to the stopper rod 41 of the stopper means 40 so that the stopper rod 41 is always urged toward the operation rod 20 side. A structure that is interposed between a certain rod receiver 102 and the stopper portion 45, that is, the stopper receiver 102 and the stopper portion 4 protruding from the stopper rod 41.
5, a compression coil spring 44 is interposed so as to engage both ends with the stopper 5, and a stopper portion 45 of the stopper means 40 is provided.
However, when the door D is tightened, it is biased so as to come into contact with the engaging flange 23 of the operation rod 20. As a result, this stopper rod 41 is
Except when the rod 41 is pushed by the engaging collar 23, basically, the rod is relatively urged by the compression coil spring 44 toward the side of the slide hole 43 where the door stop 61 is provided. The shaft pin 42 of 41 is positioned.

The stopper portion 45 of the stopper means 40 has a substantially plate-like shape with the plate thickness side being the horizontal direction, and the operation rod is provided at the tip of the stopper portion 45 from its upper end to its lower end. 20 said engaging collar 2
The inclined surface 45 that descends so as to gradually protrude toward the 3 side
a is provided, and when the door D is normally closed and when the door D is tightened, the side edge of the engaging collar 23 is in contact with the inclined surface 45a, and the door D
The stopper means 40 is provided so that the contact between the inclined surface 45a and the engaging flange 23 is released when the door is opened, that is, when the door stop 61 is projected from the door D. . Moreover, when the operation rod 20 is pushed downward with the door D closed, the stopper means 40 is pushed by the urging force of the compression coil spring 44 and moves toward the door stop portion 61 side. Then, at a position where the engaging brim 23 has passed the inclined surface 45a, the stopper means 40 again moves the compression coil spring 4 to the operation rod 20 side.
It is configured to be pushed back by 4.

As a result, when the door D is closed,
The operating rod 20 is pushed downward, and the stopper means 40 is pushed toward the door-stop portion 61 side, so that the operating rod 2
0, the lower surface of the stopper portion 45 of the stopper means 40 pushed back at a position past the side surface of the engaging collar 23 engages the upper surface of the engaging collar 23.
The push-back of the operating rod 20 upward is suppressed.

The compression coil spring 110 provided between the first rod 50 and the second rod 60 included in the urging operation means A, and the compression coil spring provided in the shaft rod 62 as a door stop member. 67 and the stopper means 4
The compression coil spring 44 included in 0 is that the compression coil spring 110 is compressed prior to the compression of the compression coil spring 67, and the compression coil spring 44 is moved by the pushing back operation of the biasing operation means A toward the inside of the door D. It is preferable that the compression coil springs 67 and 110 in the urging operation means A are compressed prior to compression.

Next, the operating state of the door airtightness maintaining device constructed as described above will be described. First, door D
In the state where the door is closed, that is, in the state shown in FIG. 4, the rod member E of the urging operation means A is pushed into the door D, and the operation rod 20 is an empty lock. It is in a state of not being pressed by C.

In this state, the rod end 30b of the connecting rod 30 is in the horizontal direction, and the rod end 3
0a is in a vertical state, and the first rod 50 of the urging operation means A is in a state of being most pulled toward the operation rod 20 side. The second rod 60 is pushed by the vertical frame 1, and the tip of the rod end 70b of the connecting rod 70 assembled to the second rod 60 is pushed down to the lowest position, that is, The connecting rod 70 is in a state in which the back side of the shaft member 73, that is, the shaft supporting bent portion side, is formed in a V shape toward the door stop portion 61 side. Further, the engagement flange 23 of the operation rod 20 is in contact with the inclined surface 45a of the stopper portion 45 of the stopper means 40.

In such a state, the secret material 91 of the shielding means B is pushed inward and the biasing operation means A is pushed.
Is pressed downward by the connecting rod 70 attached to the second rod 60, that is, in contact with the surface of the floor 2, and elastically maintained by the compression coil springs 67 and 110. Being biased.
Further, the urging operation means A is mainly composed of the compression coil spring 11
The urging force of 0 and the urging force of the compression coil spring 67 of the door-stop member are applied to the door-contact member 61 so that the tip end of the door-stop portion 61 is projected.

In this state, when the empty lock C is turned downward and rotated as shown in FIG. 5, the pressing plate 7 provided on the empty lock C is rotated downward and the operating rod 20 is moved. It is pushed downward against the bias of the compression coil spring 22. As a result, the rod end 30b of the connecting rod 30 is gradually pushed down, the rod end 30a is moved to the first rod 50 side, and the first rod 50 is pushed to the second rod 60 side. The compression coil spring 110 is strongly compressed.

In this state, the engaging flange 23 of the operating rod 20 is engaged with the stopper portion 45 of the stopper means 40.
6 against the bias of the compression coil spring 22 so as to pass over the inclined surface 45a of the operation rod 20, as shown in FIG.
By pushing further downward, the lower surface of the stopper portion 45 is engaged with the upper surface of the engaging flange 23, and the operation rod 20 is prevented from returning upward, so that the first rod 50 by the connecting rod is against the first rod 50. Try to maintain the pressed state.

By opening the door D in this state, as shown in FIG. 7, the side of the door contact portion 61 of the urging operation means A moves from the door D to the compression coil spring 6 described above.
It will be pushed out by the action of 7,110. The protrusion of the rod member E in the biasing operation means A, in particular,
Along with the movement of the second rod 60 toward the protruding side, the tip end side of the rod end 70a of the connecting rod 70 used for the raising and lowering operation of the shielding means B is set to the protruding side of the second rod 60, that is, the door. It rotates toward the contact portion 61 side, and thereby the tip end side of the rod end 70b is rotated upward. That is, by setting the rod end 70a in a substantially vertical state and the rod end 70b in a substantially horizontal state, the shaft pin 82 of the elevating guide tool 80 is guided upward, and the rod pin 82 is guided by the shaft pin 82. The upper ends of the assembled rods 93, 93 are pulled up, and the airtight material 91 in the shielding means B is pulled up into the door D.

As a result, when the door D to be opened is opened, the shielding means B separates from the surface of the floor 2, so that the door D can be reliably and smoothly opened. Further, as the rod member E projects from the door D, the second rod 60 provided in the rod member E causes the door stop portion 6 to move.
1 and the engagement state between the stopper portion 45 of the stopper means 40 and the engagement flange 23 of the operation rod 20 is released.

In this state, as shown in FIG.
By releasing the engagement with the operating rod 20, the operating rod 20 biases the compression coil spring 22 on the operating rod 20 and the first rod 5 in the biasing operation means A.
When the compression coil spring 110 is biased at 0, the compression coil spring 110 is pushed back upward. As a result, in the connecting rod 30 that has stored the biasing force on the compression coil spring 110, the rod end 30b is in the horizontal direction and the rod end 30a is in the vertical direction. The accumulating force associated with the rotation of the connecting rod 30 is eliminated. From this point of view, the pushing operation of the door stop 61 against the biasing operation means A against the biasing force of the biasing operation means A can be performed with a relatively small force. Further, when the door D is closed in this state, the inclined surface 45a of the stopper portion 45 of the stopper means 40 is formed.
Is in contact with the side surface of the engaging collar 23, and enables the stopper portion 45 to be pushed by the engaging collar 23 when the operating rod 20 is pushed down.

It is needless to say that the airtightness retaining device for the door constructed above is a typical embodiment, and is not limited to the embodiment disclosed above. For example, the compression pressure in each of the compression coil springs 22, 44, 67, 110 can be changed or adjustable, or the bending angle of the connecting rods 30, 70 or the mounting position thereof can be changed or adjusted. May be. Further, the protrusion size of the door contact portion 61 may be made variable or adjustable, and the strength of contact of the stopper portion 45 with the engaging collar 23 may be made variable or adjustable. Further, the protruding width of the airtight material 91 in the shielding means B may be variable or adjustable.

In addition, the operation box 10 is constructed so that the operation box 10 can be installed in the installation space of the door without any gap so that the operation box 10 can be attached to the lower part of the door to be installed without play. Alternatively, the operation box 10 may be divided into a plurality of parts, that is, a set of a plurality of parts in the height direction, the width direction, and the thickness direction of the operation box 10. The operation box 10 may be constructed by locating, or the operation box 10 may be variably or adjustable in the height direction, the width direction, and the thickness direction.

[0038]

According to the present invention, a door airtight holding device is
The rod member is configured such that the front end side is constantly urged to project outward from the side surface of the door D, and the projecting portion from the door D is pushed back into the door D as the door D is tightened. An urging operation means A having E, and a rod member E being pulled into the door D as the rod member E protrudes from the door D, and a pushing-back operation of the rod member E toward the door D. Along with this, a configuration is provided that includes a shielding means B that projects from the door D, and when the door D is tightened, an operation is performed in the unlocking direction of the empty lock C provided on the door D. Accordingly, since the urging force of the urging force in the protruding direction of the rod member E is stored, when the door D is opened, the airtight material 91 portion of the shielding means B is reliably and quickly operated. In the door D It has the features to be placed can.

Further, according to the present invention, the airtightness maintaining device for the door is biased so that the front end side thereof always projects outward from the side surface of the door D, and the door D is tightened by the door tightening operation. The urging operation means A having a rod member E configured so that the protruding portion from the inside is pushed back into the door D, and a downward movement of the door D following the pushing back operation of the rod member E toward the inside of the door D. The door D is ejected toward the door D and the rod D is ejected from the door D.
The rod member is configured to include a shielding means B that is pulled in, and when the door D is tightened, the rod member is moved in the unlocking direction of the empty lock C provided on the door D. Since the biasing force of the biasing force in the protruding direction at E is stored, when the door D is tightened, the rod member E of the biasing operation means A is pressed by the compression coil spring 110 with a relatively small force. It has the feature that it can be pushed into the door D against the power.

[Brief description of drawings]

FIG. 1 is a front view of a main part with a part of a door mounting portion cut away.

FIG. 2 is a perspective view showing each of the essential parts of the airtightness maintaining device in a partially cutaway manner.

FIG. 3 is a perspective view of a main part of a part of an empty lock operation part.

FIG. 4 is a cross-sectional view of a main part showing a main part of the airtight holding device in a door tightened state.

FIG. 5 is a cross-sectional view of essential parts showing an essential part of the airtight holding device during an empty lock operation.

FIG. 6 is a cross-sectional view of a main part showing a main part in a state in which a stopper means is engaged with an operating rod by an air lock operation of an airtight holding device

FIG. 7 is a cross-sectional view of essential parts showing an essential part of the airtightness maintaining device when the door is opened.

FIG. 8 is a cross-sectional view of a main part showing a main part in a state where the door of the airtight holding device is completed and the operation rod is returned to the original state.

[Explanation of symbols]

 A biasing operation means B shielding means C empty lock D door E rod member

Claims (1)

[Claims] 1. A door is provided in the door, and a tip end side is always biased to project outward from a side surface of the door, and a projecting portion from the door is formed in accordance with a door tightening operation of the door. An urging operation means provided with a rod member configured to be pushed back into the door; and a door provided with a lower portion of the door and the urging operation means pushing back the rod member toward the inside of the door. An airtightness maintaining device for a door, which is provided with a shielding means that is protruded downwards of the rod member and is retracted into the door when the rod member is ejected from the door, and when the door is tightened, The urging force of the urging of the rod member of the urging operation means in the protruding direction is increased in accordance with the operation of the empty lock provided in the door in the unlocking direction. A gas-tight holding device.