JPS647197Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in an opening/closing device for a horizontal or horizontal pulling shutter having a winding drum and a delivery shaft.

[Prior art and its problems]

Conventionally, in this type of shutter, as shown in FIG. 1, a torsion spring 12 biased in the winding direction is built into the winding drum 10 of the shutter, and one end of the spring 12 is connected to the winding drum 10.
The periphery of the winding drum 10 and the feed gear 17 is adapted to respond to changes in the winding diameter of the slat 19 in the winding drum 10 by being engaged with the shaft 9 on which the winding drum 10 is pivoted at the other end. The speed difference was resolved (for example, Utility Application No. 47-91143)
However, as shown in FIG. 3, the slat 19 is tilted downward, or as shown in FIGS. 4 and 5, the slat 19 is sent out horizontally and then vertically or inclined. , the change in the load applied to the slat 19 is large, and as a result, the force applied to the feed gear 17 and the connecting part 20 of the slat that meshes with it becomes large, causing severe wear and tear on this part. The torsion spring 12 also needed to have a large torque.

[Purpose of invention]

In order to solve these conventional drawbacks, the present invention reduces the load on the slat by installing a torsion spring biased in the direction of shutter delivery between the delivery shaft of the shutter and the feed gear loosely fitted to the delivery shaft. Supported by a winding drum,
The torsion spring merely takes up the sagging of the slat between the winding drum and the feed gear, thereby providing a shutter opening/closing device in which the torque of the torsion spring can be minimized.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the present invention has the following features in item 1: The feed shaft 14, which is interlocked with the winding drum 10 by a chain or the like, is rotated almost synchronously in the same direction as the winding drum 10. One end of the torsion spring 12 that is fitted and biased in the sending direction of the shutter A is locked to this gear 17, and the other end of the spring 12 is connected to the feed gear 17.
The feed shaft 14 and the feed gear 17 are locked together to provide slippage between the feed shaft 14 and the feed gear 17.

In addition to this, in Section 2: A detection device such as a phototube switch or a proximity switch is installed between the winding drum 10 and the feed gear 17 in a position close to the shutter slat 19. 21 will be provided.

; is adopted as a technical means.

[Operation] When closing the shutter A, the winding drum 10 is rotated in the rewinding direction of the shutter A, and the feed shaft 14 is driven in the same direction as the winding drum 10 via the chain 7.

In such a case, the feed shaft 14 and the feed gear 17 are rotated in the same direction by the torque of the torsion spring 12, and the slat 19 is moved in the direction of the arrow M via the connecting portion 20 of the slat 19 meshed with the feed gear 17. Move to block shutter A.

Further, when opening the shutter A, the winding drum 10 is driven in the opposite direction of rotation.
(Wind-up direction of shutter A) In this way, the feed shaft 14 is driven in the same direction, and the feed gear 17 is also rotated in the same direction against the torque of the torsion spring 12.
9 moves and opens shutter A.

Here, if a detection device 21 such as a phototube switch or a proximity switch is provided between the winding drum 10 and the feed gear 17 in a position close to the slat 19, when the shutter A is closed, a foreign object or the like will come into the opening and cause the shutter to become clogged. If this becomes impossible, the winding drum 10 and the feed shaft 14 will rotate in the closing direction, but the feed gear 17 will stop against the torque of the torsion spring 12, and the slat 19 will be in a relaxed state, so this can be detected. Shutter A
It is possible to stop the blockage work.

(Embodiment) To explain an embodiment of the present invention with reference to the drawings, in Fig. 2, reference numeral 1 denotes a fixed electric opening/closing machine that drives a shutter, and a chain wheel 2 fixed to the drive shaft of the opening/closing machine is used to control the chain. 4, and a winding drum 10 fixed to the shaft 9 by a shaft 9 to which the chain wheel 3 is fixed.
to drive.

8 is a bearing for the shaft 9. In the figure, the shaft 9 is separated and fixed to both ends of the winding drum 10, but it goes without saying that it does not have to be separated.

Reference numeral 14 denotes a delivery shaft that is arranged parallel to the winding drum 10 and the shutter at an appropriate interval in the delivery direction, and is fixed to this shaft 14 via a chain 7 by another chain wheel 5 fixed to the shaft 9. The feed shaft 14 is driven by interlocking the chain wheels 6 and setting the tooth ratios of the chain wheels 5 and 6 to be the same or appropriate. Reference numeral 13 denotes a bearing for the delivery shaft 14. Reference numeral 12 denotes a torsion spring biased in the direction of delivery of the shutter, one end of which is locked to the delivery shaft 14, the other end of which is locked to core discs 15, 15 loosely fitted to both ends of the delivery shaft 14;
A cylindrical body 16 is integrally attached between the peripheral parts of these core disks 15, and feed gears 1 are attached to both ends of the cylindrical body.
7 is fixed, and the feed gear 17 is connected to the feed shaft 1.
It is loosely fitted to the delivery shaft 14 via a bearing 18 that supports the shaft 4.

Reference numeral 19 denotes a plurality of shutter slats forming the shutter A, and the connecting portion 20 of each slat is meshed with the feed gear 17.

Since it is configured as above, shutter A
When closing, the opening/closing machine 1 is driven, and the chain wheel 2 closes the chain wheel 3 via the chain 4.
The winding drum 10 is rotated to drive the shaft 9, and the winding drum 10 is rotated in the unwinding direction of the shutter A, and is also fixed to the delivery shaft 14 via the chain 7 by the chain wheel 5 fixed synchronously to the shaft 9. The chain wheel 6 is rotated in the same direction to drive the delivery shaft 14. In such a case, the feed shaft 14 and the feed gear 17 are rotated in the same direction by the torque of the torsion spring 12, and the slat 19 is moved in the direction of the arrow M via the connecting portion 20 of the slat 19 meshed with the feed gear 17. Move to block shutter A.

Also, when opening the shutter A, the opening/closing device 1 is driven in the opposite rotation direction to the above-mentioned direction to open the winding drum 10.
When the shutter A is driven in the winding direction, the feed shaft 14 is driven in the same direction, the feed gear 17 also rotates in the same direction against the torque of the torsion spring 12, and the slat 19 moves in the direction of arrow N. to open shutter A.

In addition, in the present invention, as shown in FIG.
A detection device 21 such as a phototube switch or a proximity switch is installed in a position close to the shutter A, so that when the shutter A is closed, if there is a foreign object in the opening and the opening becomes impossible to close, the winding drum 10 and the feed shaft 14 are moved in the closing direction. Although it rotates, the feed gear 17 stops against the torque of the torsion spring 12, and upon detecting that the slat 19 is in a relaxed state, the switch 1 is stopped.

In the figure, the detection device 21 is connected to the shutter A.
Although it is placed above the shutter A, it may also be placed below the shutter A depending on the shape of the shutter slat.

〔effect〕

As mentioned above, the present invention has a take-up drum for winding the shutter slat and a delivery shaft for sending out the shutter slat, and the delivery shaft that interlocks with the take-up drum is rotated almost synchronously in the same direction as the take-up drum. A feed gear that meshes with the connecting portion of the shutter slat is loosely fitted onto the feed shaft, and one end of a torsion spring biased in the feed direction of the shutter A is locked, and the other end of the spring is engaged with the feed gear. Since this relates to an opening/closing device for a shutter that stops the shutter, a torsion spring biased in the direction in which the shutter is sent out is interposed between the feed gear and the feed shaft to prevent slippage between the feed shaft and the feed gear. It is possible to Also, the load on the slat is supported by the take-up drum, and the torsion spring can be a spring with the minimum torque necessary to take up the sag in the slat between the take-up drum and the feed gear.

In addition, if a detection device is installed near the slat between the winding drum and the feed gear, the shutter A
This system has features such as being able to prevent damage to shutter A by detecting the sag that occurs in the slats if a foreign object hits the opening and the opening becomes impossible to close. Can be used with both horizontal and horizontal pull shutters.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention in comparison with a conventional device. Fig. 1 is a plan view of the conventional device as seen from the bottom side of the horizontal pulling shutter, and Fig. 2 is a plan view of the present invention as seen from the bottom side of the horizontal pulling shutter. FIG. 3, FIG. 4, and FIG. 5 are explanatory diagrams showing the stretched state of the shutter, and FIG. 6 is an explanatory diagram showing the case where a foreign object is present in the opening of the shutter. 10... Winding drum, 12... Torsion spring, 14... Feeding shaft, 17... Feeding gear,
19...Shutter slide light, 20...Joining portion, 21...Detection device.

Claims (1)

[Scope of Claim for Utility Model Registration] The winding drum has a winding drum 10 for winding the shutter slat 19 and a delivery shaft 14 for delivering the shutter slat 19. 10, and a feed gear 17 that meshes with a joint 20 of the shutter slat 19 is loosely fitted onto the feed shaft 14, and one end of the torsion spring 12 biased in the feed direction of the shutter A is engaged. stop,
A shutter opening/closing device characterized in that the other end of the spring 12 is locked to the feed gear 17 to provide slippage between the feed shaft 14 and the feed gear 17. The utility model according to claim 1, characterized in that a detection device 21 such as a phototube switch or a proximity switch is provided between the winding drum 10 and the feed gear 17 in a position close to the shutter slat 19. Shutter opening/closing device.