JPH0743428Y2 - Open / close door fall prevention device with a movable center pillar - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is a so-called opening / closing type such as an overhead door or a shutter provided with a movable center pillar (including a removable center pillar) for opening / closing a front opening or the like. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an opening / closing door fall prevention device having a movable center pillar that prevents the door body from falling when the movable center pillar is moved and opened.

[Conventional technology]

A conventional example of an opening / closing door having a movable center pillar will be described using a chain type overhead door (hereinafter referred to as an OH door). FIG. 6 is a front view of the inside of an OH door equipped with a conventional fall prevention device.

The OH door A has guide rails B and B each consisting of a vertical rail portion 1 and a horizontal rail portion 2 mounted on both sides of the front opening, and further, a left and right vertical rail portion at a middle position of the front opening.
A movable center pillar C, to which 1a and 1a are attached symmetrically, is located. On the upper skeleton side D of the movable center pillar C, the divided horizontal rail portions 2a for left and right 2a are attached. A hanger roller is attached to the upper part of the movable center pillar C, and the hanger roller is fitted into a hanger rail provided on the entire length of the upper side of the front opening so that the movable center pillar C extends in the width direction of the front opening. The upper and lower rods, which are movable, are respectively projected and retracted from the upper and lower ends of the movable center pillar C by operating the operation lever 3, and are provided at the mounting positions on the upper skeleton side D and the floor side of the front opening, respectively. The upper and lower rods are inserted through the plate so that the movable center pillar C can be positioned and attached.

On the other hand, the door bodies E, E, which connect the panels with hinges and have the rollers 4 attached to both ends thereof, are arranged on both the left and right sides with the movable center pillar C interposed therebetween. On the upper skeleton side D of the front opening, the winding drums F, 5a are provided on both sides, and the torsion coil spring 6 is provided at the center, respectively.
F is rotatably attached, and the wire drums 5 and 5a and the wire ropes 7 and 7 that are respectively connected to the hanging points provided on the lower ends of both sides of the door bodies E and E are always urged in the winding direction and the door is closed. The balance between the main bodies E and E is maintained. Also, the winding shaft
A chain hoist 9 engaged with a hand chain 8 is attached to one end of each of F and F, and the winding shafts F and F can be rotated in the forward and reverse directions by a winding transmission means.

The OH door A configured as described above has the door bodies E, E opened, and the door bodies E, E stored on the horizontal rail portions 2, 2a side.
However, the fall prevention device that prevents the device from falling due to an erroneous operation is configured as follows.

a) As shown in the figure, the upper skeleton D at the mounting position of the movable center pillar C
On the side, a link mechanism that abuts on the upper rod of the movable center pillar C is attached, and the horizontal rail portion 2 on the side of the movable center pillar C is engaged with the link mechanism by pushing and pulling the upper rod.
The locking body G protruding and retracting from a and 2a was attached. In this fall prevention device, after the door bodies E, E are opened, the upper rod is pulled down to move the movable center pillar C, whereby the locking body G is projected into the horizontal rail portions 2a, 2a, and the Rail part 2,2
Even if the door bodies D, D housed on the a side are dropped, the locking body G is brought into direct contact with the roller 4 to prevent it.

b) Although not shown, as another example, as another example, a ratchet gear mounted coaxially with the winding shaft, a pawl body via a connecting plate engaging and disengaging the ratchet gear, and a connecting plate and an inner wire are connected. There is a fall prevention device composed of a working arm. This fall prevention device is interlocked with the lowering of the upper rod of the movable center column, the pawl body is engaged with the ratchet gear via the operating arm, and the rotation of the winding shaft is locked. By pushing up, the meshing relationship between the ratchet gear and the claw body is released.

[Problems to be solved by the device]

However, the fall prevention device has the following problems.

a) The former fall prevention device using a locking body rotates the take-up shaft side if the hand chain is misoperated and the door body is lowered while the door body is opened and the fall prevention device is operating. Then, the wire rope was loosened, and the wire rope came off the wire drum, and it took a lot of trouble to restore the wire. Further, even if the door body is dropped, the door body may not be completely caught and may be dropped on one side, or may be dropped to the floor side without being caught, resulting in difficulty in reliability.

b) The latter of the prior art using the ratchet gear requires a large space for mounting the fall prevention device on the upper skeleton side of the front opening, so that the width of the movable central column becomes large and the movable central column becomes large. became. In addition, since the pawl is rotated downward and meshes with the ratchet gear, the pawl does not easily come off when releasing the fall prevention device, which causes a problem in the opening / closing operation.

This invention has been made in view of the above problems, and when the fall prevention device is operated, even if an attempt is made to lower the door body by an erroneous operation, the winding shaft is prevented from rotating and the fall prevention is highly reliable. Moreover, it is an object of the present invention to provide a fall prevention device for an opening / closing door having a movable center pillar that does not require a large installation space and can reliably release the fall prevention device.

[Means for Solving the Problems]

In order to solve the above-mentioned problems, the present invention relates to an opening / closing door having a movable center pillar that is vertically fixed to a building body side by a rod, and an upper rod of the movable center pillar is provided on the upper body side of the movable center pillar mounting position. A fall prevention device for an opening / closing door, which is provided with a connecting mechanism that interlocks with the vertical movement of the opening / closing mechanism and a stopper mechanism that suppresses rotation of a winding shaft that raises / lowers the opening / closing door body by the operation of the connecting mechanism. , A lower connecting rod that interlocks with the upper rod and an upper connecting rod that is biased downward are connected to both ends of a connecting plate that is rotatably supported by a supporting member, and the upper connecting rod is extended. An engaging rod for activating the stopper body is formed on the upper part of the winding mechanism, and the stopper mechanism is used to wind the winding body while the stopper body for pressing the circumferential surface of the winding shaft is biased in the anti-pressing direction. The stopper body is arranged so that it can come into contact with and separate from the peripheral surface of the shaft so that the stopper body comes into contact with the engaging rod of the connecting mechanism, and the stopper body is separated from the winding drum by the upward movement of the upper rod. The present invention constitutes a fall prevention device for an opening / closing door having a movable center pillar.

[Action]

According to this invention, when the upper rod is pulled down at the mounting position of the movable center pillar, the stopper body presses the peripheral surface of the winding shaft in conjunction with the operation of the connecting mechanism, so that the rotation of the winding shaft is suppressed. , Prevent the door body from falling. Further, when the upper rod is pushed up, the stopper body releases the pressed state with the winding shaft in conjunction with this, so that the winding shaft can rotate and the door body can be lowered.

With the above, the winding shaft is surely locked by the stopper body, and at this time, for example, even if the hand chain is operated, the winding shaft does not rotate, and therefore the wire rope does not loosen and is securely attached. Provides a highly effective fall prevention function. Further, since the stopper body only presses the winding shaft, the space for mounting the fall prevention device can be small, and the locked state can be easily released.

〔Example〕

An embodiment according to the present invention will be described with reference to the drawings in an example applied to an OH door. Figure 1 shows the fall prevention device OH
The side view of the OH door showing the state where it is attached to the door, and Fig. 2 is the same.
A front view of the OH door, FIG. 3 is a partially cutaway perspective view showing the stopper mechanism, FIG. 4 is an explanatory view showing a state where the stopper of the fall prevention device is operating, and FIG. 5 is a view of the fall prevention device. It is explanatory drawing which shows a cancellation | release state. In the description of the embodiments, the same members and the same parts as those in the prior art will be designated by the same reference numerals, and the description of the structure and operation thereof will be omitted.

The fall prevention device H is attached to the upper skeleton side D of the mounting position of the movable center column C in the front opening I, and above the corresponding position of the upper rod 10 of the movable center column C, the engaging rods 11, 11 are attached to the upper part.
A connecting mechanism J provided with is attached, and a stopper mechanism K including a stopper body 22 engaged with the engaging rods 11 and 11 is provided.

The connecting mechanism J, as shown in FIGS. 1 and 2,
A connecting rod 13a that is abutted and lifted by pushing up the upper rod 10 to the bottom side of the bracket 12 fixed to the body side D
Is provided upright, and the connecting rod 13a is passed through the insertion holes of the guide plates 12b and 12c which are horizontally extended between the brackets 12. Also, a similar guide plate 12d is provided on the upper part of the bracket 12 so that one of the connecting rods 1
A connecting plate 13c which penetrates 3b and is swingably mounted on both sides by a fixed shaft provided on the guide plate 12b.
The ends of both the connecting rods 13a and 13b are pivotally supported at the both ends of the. Further, a pair of engagement rods 11 and 11 having inclined surfaces 11a and 11a formed on the upper side of the connecting rod 13b via a support plate 14 are provided side by side. Further, a coil spring 15 for pushing up the engaging rod is interposed between the flange portion 13b 'provided at a midway position of the connecting rod 13b and the guide plate 12d.

The connecting mechanism J configured as described above pushes up the upper rod 10 of the movable center pillar C to resist the urging force of the coil spring 15 while connecting the connecting rod 1 via the connecting plate 13c.
By interlocking 3a and 13b to move the engaging rods 11 and 11 downward and lower the upper rod 10,
The connecting rods 13a and 13b are actuated by the urging force of 15,
The engaging rods 11 and 11 can be moved upward.

On the other hand, the stopper mechanism K is constituted by drum brackets 20, 20 for rotatably attaching and supporting the wire drums 5a, 5a on the side of the movable center pillar C. That is, as shown in FIG. 3, elongated holes 20a, 20a elongated in the wire drum 5a, 5a direction are formed on the side surfaces of the brackets 20, 20 on both sides, respectively.
Is drilled horizontally, and the stopper shaft 21 is inserted between these elongated holes 20a, 20a so that the drum brackets 20, 20 are laterally extended.
A stopper body 22, which is located on the outer side surface of 20, 20 and presses the brim-shaped peripheral portions 5a ′, 5a ′ formed at the ends of the wire drums 5a, 5a,
22 is pivotally supported. The stopper shaft 21 has a coupling mechanism J
As the engaging rods 11, 11 move upward, the inclined surfaces 11a, 11a
The outer surface is slid to allow movement along the long holes 20a, 20a. Further, the stopper bodies 22 and 22 are formed with sawtooth-shaped pressing portions 22a having substantially the same radius of curvature as the wire drum peripheral portions 5a 'and 5a' at the tips thereof to increase the friction resistance. Further, flange portions are formed on both end portions of the stopper shaft 21, and return torsion coil springs 23 are respectively interposed between the stopper bodies 22 and 22 and the return torsion coils. One end of the coil spring 23 is projected to the latching pin 22b projecting from the lower part of the side surface of the stopper body 22,22, and the other end is projected from the outer surface of the drum bracket 20,20 to form the lower surface of the stopper body 22,22. The guide pins 20b are brought into contact with the respective guide pins 20b.

Therefore, the stopper bodies 22 and 22 resist the urging force of the return torsion coil spring 23 when the stopper shaft 21 moves along the elongated holes 20a and 20a, and moreover, the guide pin 20.
Movement is restricted in the horizontal direction by b, and the wire drum peripheral edge portions 5a ', 5a' are pressed, and in this pressed state,
As shown in FIG. 4, the center point O of the wire drums 5a, 5a,
Point of action O'on the pressing portions 22a, 22a of the stopper bodies 22, 22
It is essential that the point O ″ on the central axis of the stopper shaft 21 be on a straight line so that the winding shafts F, F are locked with the highest certainty. When the state is released, the stopper bodies 22, 22 are moved in the horizontal direction while being regulated by the guide pin 20b by the urging force of the return torsion coil spring 23 (this state is shown in FIG. 5). Reference numeral 24 shown in FIG.
It is a guide plate for inserting 1,11.

The operation of the fall prevention device H configured as described above will be described together with the opening / closing operation of the door bodies E, E. First, the door body E, E
The stopper mechanism K
5 is in the state shown in FIG. 5, and if the winding shaft F is rotated by operating the hand chain 8, the wire drums 5 and 5a also rotate in the direction in which the wire ropes 7 and 7 are wound. Ascends and is stored on the side of the horizontal rails 2, 2a. After opening the door bodies E on both sides, the operation lever 3 is operated to move the movable pillar C, and the upper rod 10 is pulled down. Operated by the urging force of the spring 15, the engagement rods 11, 11
To move to the state of FIG. 4 from FIG. 5,
As the engaging rods 11 and 11 move upward, the stopper shaft 21 is
0a, 20a, the stopper body 22, 22 is the pressing portion 22a, 22a, the wire drum peripheral portion 5a ', 5
By pressing a ', the winding shafts F, F are locked so as to suppress the rotation. The pressed state of the stopper bodies 22, 22 is the fourth
As shown in the figure, since the respective points O, O ′, O ″ are positioned on a straight line, the wire ropes 7, 7 are unwound in the direction of rewinding, that is, the door bodies E, E indicated by the arrow X are lowered (fallen). ), The rotation of the wire drums 5a, 5a is stopped and the winding shaft
It secures the locked state of F, F, and even if the hand chain 8 is operated by mistake, the winding shaft FF does not rotate, so that the wire ropes 7, 7 are not loosened. By the way, even if the movable central pillar C is moved, the door bodies E, E
May not be completely raised, or due to the return of reaction when rising, the lower end of the panel may be located in the moving range of the movable center column C, and since it hits the movable center column C,
There were times when I couldn't move. In this case, the door body E, E
However, since the stopper bodies 22 and 22 press the wire drum peripheral portions 5a 'and 5a' as shown in FIG. 4, the fall prevention device H rotates in the arrow X direction. However, when the stopper bodies 22 and 22 press the peripheral portions 5a 'and 5a' of the wire drums, since the stopper bodies 22 and 22 are pressed laterally above the central axis, the door bodies E and E
Arrow Y, which is the winding direction of the wire rope 7,7
Although the resistance increases in the direction, the take-up shafts F, F rotate while the stopper bodies 22, 22 are lifted, so that the door bodies E, E can be raised.

On the other hand, to close the open state of the door bodies E, E, the movable center pillar C is moved to the mounting position and the operating lever 3 is operated to complete the mounting of the movable center pillar C. When the upper rod 10 is pushed up, the connecting mechanism J is operated to engage the stopper shaft 21 with the engaging rod.
Since 11, 11 are moved downward, the state shown in FIG. 4 shifts to the state shown in FIG. 5, and accordingly, the stopper bodies 22, 22 are urged by the returning torsion coil spring 23 to form the elongated holes 20a, 20a ( (Horizontal direction) to release the locked state with the wire drums 5a and 5a. Since the stopper bodies 22, 22 move in the horizontal direction from the peripheral portions 5a ', 5a' of the wire drums, the stopper bodies 22, 22 are easily released from the pressed state. As shown in FIG. 5, when the stopper bodies 22 and 22 are released, the winding shafts F and F can be rotated, so that the hand chain 8 is operated to operate the door body EE.
Down to close the front opening.

The mounting position of the stopper mechanism K is not limited to the above-mentioned embodiment, and the same action and effect can be obtained as long as the pressing portion of the stopper body is oriented in the same direction as in the embodiment. Further, in the above embodiment, the stopper body is configured to be pressed to the peripheral edge of the wire drum, but it is of course possible to directly press the winding shaft to suppress the rotation thereof. That is. Further, in the above-mentioned embodiment, the wire rope suspension base is attached to both end surfaces of the door body, and the wire rail is stored in the guide rail, which is applied to the so-called inside storage type OH door. It can also be applied to outside-type OH doors where the suspension is avoided and the suspension base is brought out to the side of the guide rail.

Further, in the above-described embodiment, the fall prevention device has been described by taking the OH door as an example, but a balance type other than the chain type has the same operational effect. In addition, the shutter provided with a detachable center pillar at the front opening and the shutter curtain connected to the slat can be wound directly on the winding shaft by the rotation of the winding shaft. A fall prevention device can be applied.

[Effect of device]

Since the present invention is configured as described above, it has the following effects.

a) When the door body is opened, even if an attempt is made to lower the door body due to an erroneous operation, the stopper body of the fall prevention device presses the winding shaft and suppresses the rotation of the winding shaft. Therefore, the winding shaft does not rotate to loosen the wire rope and disengage from the wire drum as in a conventional fall prevention device using a locking body for a chain type overhead door.

b) Since the take-up shaft is directly pressed by the stopper body to lock the take-up shaft, the reliability of the fall prevention is higher than that of the conventional fall prevention device using the engaging body.

c) Since the fall prevention device is configured only by the stopper mechanism including the connecting mechanism and the stopper body that presses the winding shaft, it does not require a large installation space and can adopt the standard size of the movable center pillar.

d) Compared to the conventional ratchet type fall prevention device, it only presses the peripheral surface of the winding shaft with a stopper body.
It is easy to release the locked state and there is no problem in opening and closing.

[Brief description of drawings]

1 is a side view of an OH door showing a state in which a fall prevention device is attached to the OH door, and FIG.
Fig. 3 is a front view of the OH door, Fig. 3 is a partially broken perspective view showing the stopper mechanism, Fig. 4 is an explanatory view showing a state where the stopper of the fall prevention device is operating, and Fig. 5 is the same drop. It is explanatory drawing which shows the cancellation | release state of a prevention apparatus. FIG. 6 is a front view of the inside of an OH door equipped with a conventional fall prevention device. A: OH door (chain type overhead door) B: Guide rail, C: Movable center pillar D: Upper frame side of frontage opening E: Door body, F: Winding shaft H: Fall prevention Device, J …… Coupling mechanism K …… Stopper mechanism 5,5a …… Wire drum 5a ′, 5a ′ …… Wire drum peripheral part 7 …… Wire rope, 8 …… Hand chain 10 …… Upper rod, 11,11 ...... Engagement rod 12 …… Brackets 13a, 13b …… Coupling rod 13c …… Coupling plate 20 …… Drum bracket 20a, 20a …… Long hole 21 …… Stopper shaft 22,22 …… Stopper body 22a, 22a… ... Pressing part (of stopper body)

Claims (1)

[Scope of utility model registration request] 1. An opening / closing door having a movable center pillar that is vertically fixed to the building body side by a rod, and is connected to the upper body side of the movable middle pillar mounting position so as to interlock with the vertical movement of an upper rod of the movable center pillar. A fall prevention device for an opening / closing door, comprising a mechanism and a stopper mechanism for suppressing rotation of a winding shaft that raises and lowers the opening / closing door main body by the operation of the coupling mechanism, wherein the coupling mechanism is a downward link that interlocks with an upper rod. The connecting rod and the upper connecting rod urged downward are connected to both ends of the connecting plate rotatably supported by the supporting member, and the stopper body is actuated by extension of the upper connecting rod. In addition to having a structure in which a connecting rod is formed, the stopper mechanism is arranged so as to be able to come in contact with and separate from the winding shaft peripheral surface in a state in which a stopper body for pressing the peripheral surface of the winding shaft is biased in the anti-pressing direction. Shi A fall prevention device for an opening / closing door having a movable center pillar, wherein a stopper body is in contact with an engaging rod of the connecting mechanism, and the stopper body is separated from the winding drum by the upward movement of the upper rod. .