JPH0225905Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a pulling device for a double door that opens and closes an entrance/exit or a window.

A high degree of airtightness is required in sterile rooms and clean rooms where electronic devices are manufactured, and the doors must be completely airtight. Because vehicles are used to transport items into and out of sterile and clean rooms, the floor is flat without any convex thresholds, and the door is placed underneath to maintain complete airtightness when closed. It is lowered so that the edge touches the floor surface, and when the door is opened, it is raised from the lowered position where it touches the floor surface to the raised position higher than the lowered position in order to reduce the resistance to the door opening operation. As described above, when the door is open and the lower edge of the door is in a raised position higher than the floor, when the door is opened and the lower edge is lowered to touch the floor, the door is opened. In order to automatically draw and create a completely airtight mechanism, guided members are provided on the upper and lower edges of the door, and the guided members are placed on the upper outer frame and floor at positions opposite to the guided members. This is a pulling device for a double-opening door, in which a guide member is arranged to draw the door toward the indoor side, and when the door is lowered, the door is drawn to the upper member of the outer frame by its own weight, and the door is closed to prevent it from opening.

Hereinafter, the present invention will be described in detail based on specific embodiments shown in the accompanying drawings.

First, a mechanism for lifting the door from the lowered position to the raised position when opening the door when the door is in the lowered position where the lower edge touches the floor in the closed state will be described.

The periphery of the door 1 is formed by an upper frame 2, a door edge frame 3, a lower frame 4, and a door end frame 5 made of extruded aluminum alloy members. The upper frame 2, the door end frame 3, the lower frame 4, and the door end frame 5 have the same cross section, and a guide groove 6 is formed inside them, and the guide groove of the door end frame 3, the lower frame 4, and the door end frame 5 A plate-shaped sliding member 7 is slidably disposed at 6 . A right-angled bent cylinder 8 is fixed to the tip and bottom of the door 1, and a flexible member 9 such as a stainless steel belt is inserted therein, and both ends of the flexible member 9 are connected to the sliding member 7, respectively. Link. That is, the sliding member 7 is slidably arranged in the guide groove 6 of the door end frame 3, the lower frame 4, and the door end frame 5, and is connected to the flexible member 9 at the corner portions of the door end and the lower part of the door end. The sliding member 7 and the flexible member 9
The transmission device 10 in which the two are connected has a flexible member 9 interposed at the corner portion. On the other hand, a handle 11 is rotatably supported at the center of the door tip of the door 1, and the handle 11 is inserted into a square hole 13 of a crank 12 housed in the door 1.
1, and the eccentric part of the crank 12 is connected to the sliding member 7, which is the driving end of the transmission 10.
Connect to the top of the . Further, the sliding member 7 on the other end side of the transmission device 10 is fixed to an outer frame side hinge 17 that is attached and fixed to the outer frame 16. The door 1 has a door hinge 15 placed on the outer frame hinge 17 and is rotatably provided.

In this door 1, FIG. 1 shows a closed state in which the door 1 is in a lowered position in contact with the floor surface 18, and in order to lift the door 1 to open the door 1, move the vertical handle 11 along the two-dot chain line. When rotated to the state shown in
Power is transmitted to the transmission 10 via the crank 12, and the upper end of the sliding member 7 is connected to the eccentric portion of the crank 12, so the sliding member 7 on the drive end side of the transmission 10 does not slide. and is displaced upward. As a result, the flexible members 9 in the bending cylinders 8 at the door tip and the lower door bottom are fixed to the outer frame side hinge 17 on the other end side of the transmission device 10, so that both of the flexible members 9 are attached to the handle 1.
1 side, the door 1 is lifted upward, and the lower edge of the door 1 is raised above the floor surface 18. Moreover, when the handle 11 is rotated back to the vertical position shown by the solid line,
The sliding member 7 on the driving end side of the transmission device 10 is slid downward, and the door 1 is also lowered accordingly, and the flexible member 9 is also returned to its original state, so that the lower edge of the door contacts the floor surface 18.

Next, a mechanism for drawing and sealing the door 1 by its own weight when the door 1 descends to come into contact with the floor surface 18 will be described.

A pulling plate 19 having a substantially U-shaped cross section and supporting pieces arranged in a row with the opening facing downward on the upper edge of the door end side of the door 1.
A guided member 20 is provided. A hanging piece 21 of the drawing plate 19 having a U-shaped cross section is bent in an inclined manner toward the door 1 as it goes downward, and its lower end is formed into an arcuate surface. A guided member 2 such as a pulling rod 22 having an arcuate lower end is provided on the lower edge of the door edge.
3 will be provided. This pull rod 22 is attached to the lower edge of the door 1 in a hanging manner. Pull plate 19, pull bar 22
Guide members 28 and 29, such as a guide shaft 27 having a tube body 26 externally fitted onto a support shaft 25, are provided at positions of the upper outer frame 24 and the floor surface 18 facing each other. The guide shaft 27 is installed horizontally at a position where, when the door 1 is lowered, the drawing plate 19 and the drawing rod 22 are brought into abutment and guided to draw the door 1 toward the indoor side. Note that the guided members 20, 2
3 and the guide members 28, 29 are not limited to the illustrated embodiment and may be modified as appropriate.
In addition, in order to maintain airtightness, gaskets 30 and 31 are attached to the outer frame 16 and the upper outer frame 24, respectively.
The door 1 is provided with gaskets 32 and 33 at the lower edge and at the joint portion of the door edge, respectively.

When the door 1 is closed, the lower edge of the door 1 rotates to a raised position higher than the floor 18, reaches the closed door position, and rotates the handle 11 to the vertical position shown by the solid line in FIG. 1, as described above. The door lowers like this.
At this time, the pull plate 19 on the upper edge of the door 1 and the pull bar 22 on the lower edge abut against the guide shaft 27, the tube body 26 rotates, and is guided along the outer circumferential arc surface of the support shaft 25, and the door 1 is 1 is drawn toward the indoor side, and the gaskets 30 and 31 of the outer frame 16 and upper outer frame 24 are attached to the door end frame 5 and upper frame 2 of the door 1.
Then, the gasket 32 at the lower edge of the door 1 is pressed by the floor surface 18, and the gasket 33 at the joining part of the door end frame 3 is pressed by the joining part of the door end frame 3 of another door 1. Further, since the pull plate 19 and the pull bar 22 fit into the upper outer frame 24 and the floor surface 18, the door 1 will not open unless the handle 11 is rotated.

As mentioned above, the present invention is based on the door frame around the door,
A sliding member is slidably arranged in the guide groove of the lower frame and the door end frame, and the flexible member inserted into the bent cylinder provided at the door end and the lower part of the door end is connected to the sliding member to form a transmission device. A crank is connected to a handle pivotally supported on the door, a driving end of a transmission device is connected to an eccentric part of the crank, and the other end is fixed to a hinge on the outer frame side that is attached and fixed to the outer frame. A double-opening door in which the side hinge is placed on the outer frame side hinge and is rotatably provided to lift the door from a lowered position where its lower edge touches the floor to a higher raised position when the door is opened or closed. In the door, guided members are provided on the upper and lower edges of the door end side of the door, and guide members for drawing the guided members toward the indoor side are arranged at positions facing the guided members on the upper outer frame and floor surface. This is a pulling device for double-opening doors that uses the door's own weight to pull the door when it is lowered, and can provide a highly airtight door. Furthermore, since the door is lowered by its own weight and pulled toward the indoor side, it is extremely easy to make the door airtight, and the door can be completely locked.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a front view schematically showing the entire structure, Fig. 2 is a partially longitudinally sectional front view showing a transmission device for raising and lowering the door, and Fig. 3 is a horizontal sectional view thereof. FIG. 4 is a vertical sectional view. 1...Door, 3...Door frame, 4...Bottom frame, 5...
Door end frame, 6... Guide groove, 7... Sliding member, 8...
Bent cylinder body, 9... Flexible member, 10... Transmission device,
11...Handle, 12...Crank, 17...
Outer frame side hinge, 15... Door side hinge, 18... Floor surface, 20, 23... Guided member, 28, 29...
Guide member.

Claims (1)

[Scope of utility model registration request] A sliding member is slidably arranged in the guide grooves of the door tip frame, bottom frame, and door bottom frame around the door, and slides with a flexible member inserted into a bent cylinder provided at the bottom of the door tip and door bottom. A transmission device is constructed by connecting the members, a crank is connected to a handle pivotally supported on the door, a driving end of the transmission device is connected to an eccentric part of the crank, and the other end is attached and fixed to the outer frame on the outer frame side. The door side hinge of the door is placed on the outer frame side hinge and is rotatable so that when the door is opened and closed, the door is moved from a lowered position where its lower edge touches the floor to a higher position. In a double-opening door that is lifted to the raised position, guided members are provided on the upper and lower edges of the door on the door edge side, and the guided members are pulled toward the indoor side to a position facing the guided members on the upper outer frame and floor surface. A pulling device for a double-opening door, characterized in that a guide member for pulling the door is arranged so that when the door is lowered, the door is pulled and closed by its own weight.