JPH017836Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a safety device for panel shutters, and more specifically, when closing the shutter, the guide rail prevents the deflection of the panel that descends from the storage rail of the shutter storage case to the guide rail. Detection should be possible at the upper part, and if any vibration that would impede descent is detected, the closing operation will be automatically stopped to prevent damage to the panel, roller shaft, or roller chain, etc. This relates to a safety device for panel shutters that allows for safety.

In this type of panel shutter, the extra length of the roller chain that vertically connects each panel is engaged with the guidance sprockets arranged on the left and right side plates of the shutter storage case, which is connected to the upper end of the guide rail. It is configured to open and close the opening in the building in conjunction with the rotation of the sprocket, so when the shutter is closed, the panel stored on the storage rail descends along the rotation trajectory of the guiding sprocket. At this time, the panel swings back and forth about roller shafts fitted into both ends of the upper frame.
For this reason, in the past, a panel guide plate was provided above the guide rail to guide the descent of the panel.

However, when the swing width of the panel is small, it is guided by the panel guide plate and descends along the guide rail without any problem, but when the swing width is large, it may come off the panel guide, and this condition Since it cannot be easily confirmed from the outside, if the closing operation continues, the panel, roller shaft, or roller chain may be damaged, and there is a drawback that the closing operation becomes impossible midway through.

In view of the above-mentioned circumstances, the present invention was devised in order to eliminate the drawbacks of the conventional methods. A safety switch connected to the power supply of the switch is installed on the top of the panel guide plate projecting upward, and a detection lever is attached to the safety switch to detect the swing of the panel as it descends along the guide rail. By cutting off the power to the opening/closing machine and stopping the panel from descending in response to the operation of the safety switch by the detection lever, the swing width of the panel as it descends from the storage rail to the guide rail when the shutter is closed is reduced. If the panel comes off or tries to come off the panel guide plate due to the large size, the detection lever attached to the safety switch will immediately detect this condition and automatically stop the closing operation. The present invention aims to provide a safety device for a panel shutter that can prevent damage to the panel, roller shaft, or roller chain.

The above objects of the present invention will become more clear by describing the embodiments shown in the drawings.

That is, in FIGS. 1 to 4, 1 is a panel shutter, and the panel shutter 1 has a plurality of long panels 2 arranged at required intervals in the vertical direction. Bearing members 4 at both ends
A roller chain 6 is attached to a roller shaft 5 which is fitted through a roller chain 6, which is pivotally connected in a continuous manner. The roller shaft 5 is attached to the outer ring plate 6a of the roller chain 6 at a position offset in the longitudinal direction from the center thereof, and the outer link plate 6a is attached to the roller 6b located before and after the roller shaft 5. , 6b and is connected to the inner link plate 6c to support the roller shaft 5.
7 is a roller rotatably supported on the roller shaft 5.

8 is a guide rail installed vertically on both the left and right sides of the building opening, 9 is a shutter storage case connected to the upper end of the guide rail 8, and the left and right side plates 10 of the shutter storage case 9 are An induction sprocket 12 is coaxially supported at the drive sprocket 11, and a roller chain 6 is meshed with the induction sprocket 12. The drive sprocket 11 is operatively connected to a switch 15 via a sprocket 14 which is pivotally supported on an intermediate shaft 13. Reference numeral 16 is a storage rail arranged horizontally inside the left and right side plates 10 of the shutter storage case 9, and the storage rail 16 is connected to the roller shaft 5 of each panel 2 that moves upward in conjunction with the rotation of the induction sprocket 12. By rolling a roller 7 supported on a shaft, each panel 2 is guided to move in the horizontal direction in a state in which the panels 2 are sequentially arranged in parallel.

Reference numeral 17 denotes a panel guide plate located inside the shutter storage case 9 and protruding obliquely upward from the upper part of the guide rail 8.
A safety switch 18 connected to the power source (not shown) of the switch 15 is provided on the upper part of the switch 7, and the safety switch 18 has a detection device that detects the deflection of the panel 2 as it descends along the guide rail 8. Lever 19
is mounted so as to face the panel lowering path side of the guide rail 8. Then, the above detection lever 1
9 is always biased toward the panel lowering path by an unillustrated bullet.

In the configuration described above, when a closing signal is issued to the panel shutter 1 that is currently opening an opening in the building, the drive sprocket 11 that is interlocked and connected to the opening/closing machine 15 rotates, and this rotation causes the The induction sprocket 12 is rotated in conjunction with each panel 2 stored in the shutter storage case 9.
After sequentially moving laterally on the storage rail 16, when the roller shaft 5 of the panel 2 located in the front row passes directly above the axis 12a of the induction sprocket 12, the direction of movement is changed from the lateral direction to the descending direction, Further, as the roller shaft 5 is moved along the rotation locus of the induction sprocket 12, it descends and sequentially moves to the guide rail 8.
The opening of the building is closed by placing it on the same plane while being supported by the building.

By the way, in the process of the closing operation as described above, since the panel 2 is supported by the roller shafts 5 fitted into both ends of the upper stile 3, the panel 2 moves along the rotation locus of the guide sprocket 12. When descending, inertia acts and swings back and forth about the roller shaft 5 as a fulcrum. For this reason, conventionally, when the swing width of the panel 2 is large, the lower end of the panel 2 hits the panel guide plate 17, and the roller shaft 5 side descends, leaving the panel guide plate 17 and falling, causing an unexpected However, in the present invention, when the panel 2 tries to come off from the panel guide plate 17,
As shown in FIG. 4, the lower end of the panel 2 pushes the detection lever 19, which activates the safety switch 18. In response, the power to the switch 15 is cut off and the closing operation is stopped. Therefore, since the panel 2 stops swinging while the power is turned off, damage to the panel 2 and damage to the roller shaft 5 or roller chain 6 caused by swinging can be prevented.

In addition, when the closing operation is stopped, if the panel 2 that has come off the panel lowering path is returned to the normal lowering position, the detection lever 19 will return to its original position due to the biasing force of the projectile, and the detection lever 19 will respond accordingly. safety switch 1
8 maintains the closed operating state, it is unnecessary to explain in detail that the panel 2 descends along the guide rail 8 from its normal lowered position.

In short, the present invention provides a safety switch connected to the power supply of the opening/closing machine on the top of a panel guide plate located inside the shutter storage case and protruding diagonally upward from the upper part of the guide rail. is equipped with a detection lever that detects the swinging of the panel as it descends along the guide rail, and in response to the operation of a safety switch by the detection lever, the power to the opening/closing machine is cut off and the panel stops descending. With this configuration, when the shutter is closed, the safety switch detects whether a panel has come off from the panel guide plate, or is about to come off, due to the large swing of the panel as it descends from the storage rail to the guide rail. The lever can immediately detect and automatically stop the closing operation.
In addition, by turning on the safety switch after stopping, raising the panel for a short period of time, and then lowering it again, the panel can be lowered after returning to its normal position. This provides an extremely useful practical effect in that the shutter can be closed while preventing damage to the panel, roller shaft, or roller chain.

[Brief explanation of the drawing]

The drawings show an embodiment of the safety device for a panel shutter according to the present invention, in which Fig. 1 is a schematic perspective view of the panel shutter, Fig. 2 is a partially detailed view of Fig. 1, and Fig. 3 is a schematic perspective view of the panel shutter. The figure is a side view of the main part, and FIG. 4 is an explanatory diagram of the operation. 1...Panel shutter, 2...Panel, 3...
...Upper stile, 4...Bearing member, 5...Roller shaft, 6...
...Roller chain, 6a... Outer link plate, 6b... Roller of roller chain, 6c...
Inner link plate, 7...Roller of roller shaft,
8... Guide rail, 9... Shutter storage case, 10... Left and right side plates, 11... Drive sprocket, 12... Induction sprocket, 12a... Shaft core, 13... Intermediate shaft, 14... Intermediate shaft sprocket , 15...Opening/closing machine, 16...Storage rail, 1
7...Panel guide board, 18...Safety switch, 1
9...Detection lever.

Claims (1)

[Scope of utility model registration request] A roller shaft is inserted into the upper end of the upper stile of each panel, and each panel is vertically connected by a roller chain attached to the roller shaft to form a shutter curtain. A shutter storage case is connected to the upper end of the guide rail that guides the shutters up and down in the same plane, and is equipped with a storage rail that horizontally guides the storage of each panel in a state in which the panels are lined up in parallel. In the panel shutter, an induction sprocket that engages with a roller chain is rotatably disposed, and an opening in a building is opened and closed in conjunction with the rotation of the induction sprocket, and the panel shutter is located in the shutter storage case. A safety switch connected to the power supply of the switch is installed on the top of the panel guide plate that projects diagonally upward from the upper part of the guide rail, and the safety switch detects the swing of the panel as it descends along the guide rail. A safety device for a panel shutter, characterized in that the panel shutter is equipped with a detection lever that detects the shutter, and is configured to cut off the power to the opening/closing machine in response to the operation of a safety switch by the detection lever, and stop the descent of the panel.