JP2565491Y2 - Panel shutter fall prevention device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fall prevention device for preventing a plurality of panels constituting a panel shutter from being dropped when a chain connecting the respective panels is broken or dropped. is there.

[0002]

2. Description of the Related Art In general, a shutter device such as a panel shutter drives a chain by a driving device such as an electric motor to open and close by opening or closing a shutter member connected to the chain.
The panel shutters are guided along guide rails where panels, which are shutter members, are arranged on both sides of the building opening. Pins protruding from both sides of each panel are evenly spaced on a chain that can move in the guide rails. To open and close by raising and lowering this chain. The chain is driven by a drive device provided in a shutter case, and each panel is housed in the shutter case in parallel in the front-rear direction.

[0003]

The panel shutter as described above drives the opening and closing of each panel by driving the chain up and down by rotating a sprocket by a motor. Each panel is connected to this chain. In addition, because each panel is opened and closed with both ends suspended from the chain, if the chain is cut due to fatigue failure or the like, each panel will fall by its own weight There is danger.

In order to solve the above-mentioned problems, the present invention provides a panel shutter drop prevention device that can reliably prevent the panel from falling even if the chain that suspends the panel is broken due to fatigue failure or the like. It is intended to be.

[0005]

Next, means for achieving the above object will be described with reference to FIGS. 1 to 8 corresponding to the embodiment. The panel shutter fall prevention device 15 of the present invention is suspended via a pin 6 at a predetermined interval between a pair of chains 14 moving in a pair of guide rails 2 arranged on both sides of the building opening 1. A panel shutter comprising a plurality of panels 3, wherein the building opening 1
A chain guide 12 that is provided in a shutter case 8 disposed on the upper edge and is provided continuously with the pair of guide rails 2 to guide the movement of the chain 14 and the pins 6; A substantially box-shaped bracket 1 provided outside one of the side surfaces 12a of the bracket 12
7, a horizontal pivot 16 provided on the bracket 17 and located near the outside of one side 12 a of the chain guide 12, and a receiver provided on the other side 12 b of the chain guide 12 facing the pivot 16. A base end is rotatably provided on the block 25 and the pivot 16, and reaches the other side surface 12 b of the chain guide 12 from the pivot 16 to abut on the receiving block 25,
An inner wall surface of a bracket 17 that is set to a length that closes the movement trajectory of the pin 6 in the chain guide 12 and that is disposed away from the pivot 16 with respect to one side surface 12 a of the chain guide 12. And a state in which the tip is inclined with respect to the pivot 16 in a direction away from the chain guide 12 in the elevation direction in a state where the rotation range is between the receiving block 25 and the inner surface of the bracket 17. The stopper piece 24 and the base 21 are pivotally supported at the base end of the stopper piece 24 so as to be coaxial with the stopper piece 24, and are rotatable within a predetermined angle range with respect to the stopper piece 24. When the chain guide 1 is rotated outside the predetermined angle range with respect to the pivot 16 together with the stopper piece 24, the tip of the chain guide 1 A pin receiving piece 20 extending on a movement track of the pin 6 moving inside and having a length to be in contact with a part of the outer peripheral surface of the pin 6. When in contact with the wall surface, the tip of the pin receiving piece 20 extends on the movement trajectory of the pin 6 of the chain guide 12 and comes into contact with a part of the outer peripheral surface of the pin 6. In the event of an abnormal cutting of 14, the pin receiving piece 20 rotates with respect to the pivot 16 together with the stopper piece 24 by the downward movement of the pin 6 that falls down the chain guide 12, and the tip of the stopper piece 24 moves to the receiving block 25. It is characterized in that the stopper piece 24 abuts and blocks the movement trajectory of the pin 6 in the chain guide 12.

[0006]

When the chain 14 for continuously suspending the panel 3 is cut, or when the drive chain 26 connecting the motor 10 and the drive unit is cut or dropped from the sprocket, the panel 3 drops to both sides of the panel 3. The pin 6 provided is moved down in the chain guide 12. Pin 6
Abuts against a pin receiving piece 20 whose tip extends into the chain guide 12, and rotates the pin receiving piece 20 with the force of dropping and simultaneously rotates the stopper piece 24.
The stopper piece 24 has a distal end provided on a receiving block 25 provided on the other side surface 12 b of the chain guide 12.
So that the chain guide 1 is abutted on the receiving block 25 and the pivot 16 at the proximal end of the stopper piece 24.
The inside of the panel 3 is closed to prevent the pins 6 from descending, thereby preventing the panel 3 from falling.

[0007]

First, as shown in FIG. 2, a pair of guide rails 2, 2 are provided on both sides of a building opening 1 in parallel with each other in the vertical direction. A plurality of panels 3 are guided so as to be vertically movable.
The panel 3 is provided with a panel plate 5 mounted on a frame 4 formed into a rectangular frame, and is engaged with the upper and lower frames so that when the panels 3 are fed out between the guide rails 2 and connected vertically, they are engaged with each other. It has a shape in which a joint is formed. In addition, each panel 3 is provided with pins 6 which are formed to protrude horizontally at slightly upper portions at both ends. Supporting rollers 7 are provided at the ends of these pins 6.

Next, a shutter case 8 connected to the guide rail 2 is provided above the opening 1 of the building. As shown in FIG. 3, the shutter case 8 has the panels 3 housed in parallel in the front-rear direction as shown in FIG. 3, and a drive unit 9 is disposed inside the case 8. The drive unit 9 is roughly constituted by a motor 10 and a sprocket wheel 11 driven to rotate by the motor 10. The sprocket wheels 11 are arranged on opposite side ends in the shutter case 8 so as to face each other and form a pair.

Below these sprocket wheels 11, a pair of chain guides 12 having a substantially U-shaped cross section are provided.
It is provided vertically with one open side facing each other. On both inner walls of the shutter case 8, guide brackets 13 having an L-shaped cross section are disposed substantially horizontally in the vicinity of the two sprocket wheels 11.

Next, a chain 14 is hung on each of the sprocket wheels 11. These chains 14 are guided up and down by the chain guide 12, and are fed out to the two guide rails 2 by the sprocket wheel 11 of the drive unit 9,
It is adapted to be caught in the shutter case 8.

The plurality of panels 3 described above are:
Each panel 3 is connected at equal intervals to a pair of chains 14 movably in the guide rails 2 near the tips of the pins 6 on both sides. That is,
Each panel 3 can be moved up and down while being hung by each chain 14 located on both sides.

As shown in FIG. 3, the panel shutter fall prevention device 15 according to the present embodiment is provided at a lower portion of a pair of opposed chain guides 12 disposed inside the shutter case 8 described above. ing. As shown in an exploded perspective view of FIG. 4, the fall prevention device 15 is generally constituted by a pivot 16, an operation shaft 18, a pin receiving piece 20 and a stopper piece 24.

As shown in FIG. 1, the pivot 16 is provided on a substantially box-shaped bracket 17 provided outside the one side surface 12a at the lower end of the chain guide 12, near the one side surface 12a. The axis is set in a horizontal direction perpendicular to the moving direction of the chain 14 and parallel to the axial direction of the pin 6 moving in the chain guide 12. The operating shaft 18 is formed in a hollow, substantially tubular shape, is rotatably connected to the pivot 16, and has a pair of ridges 19 formed on the outer peripheral surface. This pair of ridges 19
The interval is an operation range of a pin receiving piece 20 described later.
The pin receiving piece 20 is formed in a substantially P-shape by forming a receiving portion 22 with a part of the outer periphery extending from the substantially ring-shaped base 21, and a pair of engagements facing the inner circumferential surface of the base 21. Piece 2
3 are protrudingly formed. Then, on the outer periphery of the operating shaft 18, both engagement pieces 23 are located between the ridges 19 and substantially mesh with each other,
They are adapted to be fitted, and can be rotated with respect to the operating shaft 18 within a predetermined rotation angle within a rotation range between the projections 19. In the present embodiment, the stopper pieces 24 are formed as a set of two pieces, and are formed to be longer than the width of the chain guide 12 and longer than the pin receiving pieces 20, and have base ends at both ends of the operation shaft 18. It is fixed and rotates with respect to the pivot 16 together with the operating shaft 18. The stopper piece 24 is provided on the pin receiving piece 20.
It is composed of a pair of left and right parts to set a larger weight, and is bent from the middle to the tip.
In the state of being pivotally attached to 6, the tip is in the elevation direction with respect to the pivot 16 with respect to the pivot 16 in a normal state, and this tip abuts on the inner wall surface of the bracket 17; Inclined away.

The other side 1 of the chain guide 12
A receiving block 25 is provided at 2 b so as to face the pivot 16. The receiving block 25 has a distal end projecting inward from the chain guide 12.

Next, the operation of the fall prevention device 15 configured as described above will be described. First, the fall prevention device 15
The normal state in which the operation is not performed will be described. FIG.
As shown in (1), the tip of the stopper piece 24 is inclined with respect to the pivot 16 in a direction away from the chain guide 12, and the tip contacts the inner wall surface of the bracket 17.
Then, each engaging piece 23 of the pin receiving piece 20 abuts between the pair of protrusions 19 of the operating shaft 18 fixed to the base end of the stopper piece 24, rotation is restricted, and rotation of the pin receiving piece 20 is prevented. The end of the receiving portion 22 extends horizontally in the direction opposite to the direction in which the stopper piece 24 faces, that is, in the movement path of the pin 6 of the panel 3 and the chain 14 in the chain guide 12. The extended end of the receiving portion 22 is located at a position where it contacts a part of the outer peripheral surface of the pin 6 that moves up and down in the chain guide 12.

Next, a case where each panel 3 is fed out from the shutter case 8 above the building opening 1 and the building opening 1 is closed will be described. In the shutter case 8, each chain 14 is guided by the chain guide 12 by the operation of the drive unit 9, and each panel 3 is extended to the guide rail 2. At this time, the pins 6 on both sides of each panel 3
Moves the chain guide 12 slowly downward.
The pin 6 comes into contact with the receiving portion 22 of the pin receiving piece 20 projecting into the movement trajectory of the pin 6 while descending from above,
As it descends, the pin receiving piece 20 is pushed down. Then, as shown in FIG. 6, the tip of the pin receiving piece 20 is inclined in the depression angle direction with respect to the pivot 16.

Then, the engaging piece 23 of the pin receiving piece 20 and the ridge 19 of the operating shaft 18 mesh with each other, and the pin receiving piece 2
0 is outside the range of a predetermined rotation angle with respect to the stopper piece 24 so that the pin receiving piece 20 and the stopper piece 24 are kept at the predetermined angle, and the stopper piece 24 is moved as shown in FIG. The pin 6 is rotated around the pivot 16 in the same direction, that is, in the direction approaching the one side surface 12a of the chain guide 12 at the same time by the gentle lowering of the pin 6. However, the lowering speed of the pin 6 is slow, and the pin 6 of the panel 3 passes while maintaining the contact state between the outer peripheral surface of the pin 6 and the pin receiving piece 20. The center of gravity of the stopper piece 24 remains in the direction away from the chain guide 12, and the pin receiving piece 2 is inclined.
When the contact with the pin receiving piece 20 is released, the rotation of the stopper piece 24 with the pin receiving piece 20 is released, and the rotation of the stopper piece 24 in the direction away from the chain guide 12 due to its own weight. The engagement of the mating piece 23 and the ridge 19 causes the pin receiving piece 20 to return to the normal state together with the stopper piece 24. Even if the panels 3 are sequentially fed out, since the lowering speed of the panel 3 is slow, the pin receiving piece 20 of the fall prevention device 15 does not interfere with each panel 3.

Next, the case where the panel 3 is raised from the guide rail 2 to open the opening 1 of the building will be described. The drive unit 9 in the shutter case 8 operates in the reverse of the operation of closing the panel 3, and the drive unit 9
Is wound up, and each panel 3 rises between the guide rails 2 and is stored in the shutter case 8. When each panel 3 moves up the guide rail 2, each pin 6 on both sides of the panel 3
Rises inside the chain guide 12. And both pins 6
Pushes up the receiving portion 22 of the pin receiving piece 20 protruding on its moving track in the chain guide 12 upward from below. Then, as shown in FIG. 7, the pin receiving piece 20 rotates with respect to the operating shaft 18 with the movement of the pin 6, and moves from the substantially horizontal state to the elevation angle direction.

However, the stopper piece 24 does not rotate with its tip abutting on the inner wall surface of the bracket 17, so that the operating shaft 18 does not rotate. That is, the pin receiving piece 20
The engagement piece 23 is within a predetermined rotation angle range between the ridges 19 of the operating shaft 18, and only pivotally moves within the range between the ridges 19. The rotation is performed only at a predetermined angle from the normal state, and at the same time as the pin 6 passes, the normal state, that is, the end of the chain guide 12
Return to the state of extending horizontally inside. Of course this panel 3
When the panel 3 is opened, the panel 3 is sequentially raised, and even if the pin 6 is intermittently abutted against the pin receiving piece 20 of the fall prevention device 15, only the pin receiving piece 20 is rotated, and each of them interferes with each other. It will not be done.

Next, when the chain 14 that suspends the panels 3 and connects the panels 3 is cut due to fatigue failure when the panels 3 are raised or lowered, or the motor 10
When the drive chain 26 connecting the drive unit and the drive unit is cut or falls off the sprocket, the panel 3 falls down the building opening 1 by its own weight. The falling panel 3 falls and moves within the guide rail 2 and the chain guide 12 at a speed several times faster than the lowering speed when the panel 3 is lowered (when closed). Then, the pin 6 of the panel 3 is moved by the force of the drop,
Collides from above. Then, the pin receiving piece 20 rotates with the force that the receiving portion 22 abuts from above. Pin receiving piece 2
0 indicates that the engaging piece 23 is engaged with the ridge 19 of the operating shaft 18, and at the same time, the stopper piece 24 is also rotated by the urging force.

When the stopper piece 24 rotates about the pivot 16, it enters the movement path of the pin 6 of the chain guide 12, and further, the tip of the stopper piece 24 moves toward the other side surface 12 b of the chain guide 12. Move to. Then, the tip of the stopper piece 24 comes into contact with the receiving block 25 on the other side surface 12b to restrict the rotation, and the stopper piece 24 is bridged between the pivot 16 and the receiving block 25. At this time, the pin receiving piece 20 is
The receiving block 2 as shown in FIG.
5 does not come into contact with the shaft 5 and wraps around the pivot 16. Then
The stopper piece 24 blocks the movement trajectory of the pin 6 in the chain guide 12, and the panel
Pin 6 is prevented from falling by the stopper piece 24,
The panel 3 is prevented from falling.

Therefore, according to the fall prevention device 15 configured as described above, the stopper piece 24 for preventing the panel 3 from falling does not operate when each panel 3 is opened or closed, and the pin receiving piece 20 does not operate. Only when the panel 3 rises or descends, it comes into contact with the pin 6, and when the panel 3 is rotated and the contact with the pin 6 is released, the stopper is stopped by its own weight or the engagement between the engaging piece 23 and the ridge 19. Because the weight of the piece 24 returns to the normal state, the fall prevention device 1 is used when the panel 3 is raised and lowered.
5 does not interfere with the panel 3.

The fall prevention device 15 is provided on the panel 3
The stopper piece 24 is rotated together with the pin receiving piece 20 by the falling speed of its own weight, and the stopper piece 24 is bridged between the pivot 16 at the base end of the stopper piece 24 and the receiving block 25 to prevent the movement of the pin 6. That is, the panel 3 is prevented from falling, and the panel 3 can be reliably prevented from falling with a simple structure.

[0024]

As described above, the panel shutter fall prevention device according to the present invention can be used when the chain that suspends the panel is cut due to fatigue failure or the like.
When the drive chain is cut or falls off from the sprocket, the pins of the panel, which drop under their own weight, come into contact with the pin receiving piece extending into the chain guide, and rotate this pin receiving piece with force. The stopper piece is also rotated, and the movement path of the pin of the chain guide is blocked in a state where the stopper piece is bridged between the pivot shaft at the base end and the receiving block at the tip end, thereby preventing the pin falling and moving in the chain guide. , Can prevent the panel from falling. Further, the pin receiving piece extending into the chain guide is attached so as to be rotatable by a predetermined angle with respect to the stopper piece when the pin is raised, and is out of a predetermined angle range with respect to the stopper piece when the pin is lowered. Since the center of gravity acts, the pin moves slowly when the panel is opened and closed in normal times, so that the stopper piece does not interfere with the pin. That is, this drop is prevented only when the chain is abnormal. The device is activated.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a panel shutter fall prevention device according to the present invention.

FIG. 2 is a front view of a panel shutter according to the embodiment.

FIG. 3 is a side sectional view of a shutter case of the panel shutter in the embodiment.

FIG. 4 is an exploded perspective view of a part of the fall prevention device in the embodiment.

FIG. 5 is a side sectional view of the fall prevention device in the embodiment.

FIG. 6 is a side sectional view showing the operation of the fall prevention device in the embodiment.

FIG. 7 is a side sectional view showing the operation of the fall prevention device in the embodiment.

FIG. 8 is a side sectional view showing the operation of the fall prevention device in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Building opening 2 ... Guide rail 3 ... Panel 6 ... Pin 8 ... Shutter case 12 ... Chain guide 12a ... One side 12b ... The other side 14 ... Chain 16 ... Axis 20 ... Pin receiving piece 21 ... Base 24 ... Stopper Piece 25 ... receiving block

Claims (1)

(57) [Scope of request for utility model registration] 1. A plurality of panels 3 suspended via pins 6 at predetermined intervals between a pair of chains 14 moving in a pair of guide rails 2 arranged on both sides of a building opening 1. A shutter case 8 disposed on an upper edge of the building opening 1.
And a chain guide 12 that is provided continuously with the pair of guide rails 2 and guides the movement of the chain 14 and the pin 6, and is provided outside one side surface 12 a of the chain guide 12.
A substantially box-shaped bracket 17 to be mounted, and the chain guide 1 provided on the bracket 17.
2, a horizontal pivot 16 located near the outside of one side 12 a, a receiving block 25 provided on the other side 12 b of the chain guide 12 facing the pivot 16, and a base pivoting on the pivot 16. While being freely provided,
The other side 1 of the chain guide 12 from the pivot 16
2b so as to abut on the receiving block 25 so as to block the movement trajectory of the pin 6 in the chain guide 12 and at a position apart from the pivot 16 with respect to one side surface 12a of the chain guide 12. The rotation range is defined between the inner wall surface of the bracket 17 and the receiving block 25 ,
A stopper piece 24 whose tip is inclined in a direction away from the chain guide 12 in the elevation direction with respect to the pivot 16 in a state in which the stopper piece 24 is in contact with a wall surface; 2
4 and is rotatably supported within a predetermined angle range with respect to the stopper piece 24, and is rotatable outside the predetermined angle range with respect to the stopper piece 24.
Together with the pivot 16, and the tip of the pivot portion extends on the movement trajectory of the pin 6 moving in the chain guide 12 and comes into contact with a part of the outer peripheral surface of the pin 6. And a pin receiving piece 20 having a length. When the stopper piece 24 is in contact with the inner wall surface of the bracket 17 , the tip of the pin receiving piece 20 is connected to the pin 6 of the chain guide 12. The pin 6 extends on the moving track and comes into contact with a part of the outer peripheral surface of the pin 6. When the cutting of the chain 14 is abnormal, the pin receiving piece 20 is moved downward by the pin 6 falling down the chain guide 12. It rotates with respect to the pivot 16 together with the stopper piece 24,
A fall prevention device for a panel shutter, wherein a tip end of a stopper piece (24) abuts a receiving block (25) so that the stopper piece (24) blocks a movement path of a pin (6) in a chain guide (12).