JPH0431991Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] This invention relates to an exterior wall blind installed outside the window of a building as a substitute for a rain shutter, and is an improvement to the mechanism for raising and lowering the slats.

[Conventional technology]

In this type of blind, it has already been proposed to automatically raise and lower a large number of slats using motor power (unspecified literature).

The slats must be raised and lowered between an open position in which they are stacked upward in a horizontal position and a closed position in which they cover the outer surface of the opening, and in the closed position they must be switched between a light-shielding position and a light-allowing position.

In detail, as shown in Fig. 2, the left and right side frames 4,
A large number of holders 6 are guided and supported on each of the holders 4 so as to be movable up and down, and a slat 5 is supported between the left and right holders 6, 6. The holders 6 that are vertically adjacent to each other are
It is assumed that the slats 5 are connected by a link 8 as shown in the figure, and the postures of all the slats 5 can be changed at the same time. One end of a chain 14 is connected to the holder 6 at the lowest end, and the chain 14 is fed and moved by a sprocket 13 provided at the upper part of the side frame 4, thereby raising and lowering the slat 5. The rotation and stopping of the sprocket 13 and the control of its rotation direction must be performed by controlling the energization of the motor 10 by operating a switch provided indoors.

[Problem that the invention attempts to solve]

This type of blind is located on the outside of the opening and is directly exposed to the elements. Therefore, it is necessary to set specifications different from those for indoor blinds. For example, in the closed position covering the outer surface of the opening, the slat position must not be easily switched due to wind or rain, regardless of whether the slat position is in the light-shielding position or in the day-lighting position. Security considerations must also be taken, and the slats 5 must not be able to be raised to the open position when operated from outside, or be easily changed from a light shielding position to a lighting position.

[Purpose of invention]

The present invention satisfies the above-mentioned requirements for maintaining the posture of the slats, simplifies the mechanism for this purpose, that is, the slat lifting and lowering mechanism, and reduces the manufacturing cost of this type of blind. Main focus.

[Means for solving problems]

The present invention is based on the premise that the attitude of the slats 5 can be changed only in the vicinity of the closed position where all the slats 5 are lowered. That is, the vertically adjacent slats 5, 5 are connected via the holders 6, 6 so as to be interlocked by the link 8, and the slats 5, 5
It is assumed that the panels are constructed so that they are pulled up in order from the bottom in a horizontal lighting position and stacked in the open position.

In the present invention, the above-mentioned exterior wall blind is provided with a posture switching means 15 for switching the slat 5 between a light shielding position and a lighting position, and a locking means 16 for selectively locking the slat 5 at each switching position. Switching between the two means 15 and 16 is performed using the feeding movement of the chain 14.

The attitude switching means 15 is composed of a disk 20 connected to the front and rear links 8 at the uppermost end, and disposed so as to be rotatable back and forth adjacent to a sprocket 13 that feeds and drives the chain 14 and is rotatable in forward and reverse directions.

The locking means 16 is provided with a pair of engagement protrusions 21, 21 on one side of the disk 20.
A pair of lock arms 26, 26 that engage the engagement protrusions 21, 21 to prevent rotation of the disk 20 when the disc 20 is rotated to the light-enhancing position and the light-blocking position are urged to swing freely in the direction of the lock position. are doing.

An operation protrusion 30 for switching the posture switching means 15 and the locking means 16 is arranged at a predetermined location on the chain 14. That is, this operating protrusion 30
Immediately before the lowermost holder 6 finishes lowering, or just before changing the angle of the slat 5 from the light shielding position to the lighting position, the lock arms 26, 26 are swung in a direction opposite to the biasing direction, and the engaging protrusion is 21, and the other lock arm 26, which is different from the lock arm 26 with which it has been engaged, respectively.
and the other engaging protrusion 21 are engaged with each other, and are arranged on the chain 14 at a position where a light-blocking position or a light-allowing position can be maintained.

[Effect]

For example, when the lowest holder 6 has descended to the vicinity of the closed position, the chain 14 is further moved in the downward direction.
When the operating projection 30 is moved as shown in FIG. 8, the operating projection 30 comes into contact with the lock arm 26 for maintaining the lighting posture which is engaged with the engaging projection 21 for maintaining the lighting posture as shown in FIG. The engaging protrusion 2 for maintaining the lighting posture by swinging the arm 26 in the unlocking direction
1 and the engagement protrusion 21.
10, the disk 20 is rotated until the engagement protrusion 21 for maintaining the light-shielding position engages with the lock arm 26 for maintaining the light-shielding position.

When the chain 14 is moved in the opposite direction from this state in which the light-shielding posture is maintained, the operating protrusion 30
contacts the locking arm 26 for maintaining the light-shielding posture, swings the arm 26 in the unlocking direction, releases the engagement with the engagement protrusion 21 for maintaining the light-shielding posture, and contacts the engagement protrusion 21. then disk 2
0 until the engagement protrusion 21 for maintaining the lighting posture engages with the lock arm 26 for maintaining the lighting posture.

[Effect of the invention] As explained above, in the present invention, the posture switching means 15 and the locking means 16 are controlled by the operating protrusion 30.
Since the switching operation can be performed using the feeding operation of 4, the structure of the elevating mechanism for the slat 5 can be simplified and manufacturing costs can be reduced.

〔Example〕

1 to 10 show embodiments of the present invention.

In Fig. 2, the proposed blind 1 has upper and lower frames 2, 3 and left and right side frames 4, 4 assembled into a rectangular frame shape, and a large number of slats 5 are arranged vertically in a horizontal position within the frame. By supporting the left and right ends with a pair of holders 6, 6, and moving each holder 6 up and down with an elevating mechanism, each slat 5 can be moved up and down between an open position and a closed position.

The holder 6 is guided and supported in the vertical groove 7 of the side frame 4 so as to be vertically movable. The vertically adjacent holders 6, 6 are connected by a pair of front and rear links 8, 8 so that the postures of all the holders 6 can be changed simultaneously. Each link 8 is restricted from bending outward in the front-rear direction at a connecting point P between the links, and is connected so as to be bendable at a connecting point Q with the holder 6.

An elevating mechanism for the slats 5 is provided at the upper ends of the left and right side frames 4, and this elevating mechanism is driven by a motor 10 disposed at the center of the upper frame 2.

In FIG. 7, the lifting mechanism includes a bracket 11 screwed to the upper frame 2, and a sprocket 13 pivotally supported by the bracket 11 via a bearing 12.
, a chain 14 wound around this, posture switching means 15 and locking means 16, which will be described later. A drive hole with a hexagonal cross section is passed through the boss of the sprocket 13, and the motor 1 is inserted into this drive hole.
0 output shaft 10a fits inside.

The chain 14 can be bent only in the direction in which it is wound around the sprocket 13, and the adjacent part of the link plate is formed flat so that it cannot be bent in the opposite direction. Furthermore, within the side frame 4, the chain 14 is connected to the sixth
As shown in the figure, it is guided and supported by guide grooves 18 provided on both the front and rear sides of the vertical groove 7. Therefore, even if an attempt is made to open the slat 5 by lifting it upward in the closed position, the chain 14 will not be bent and the bracket 1 will
It is received by the chain guide surface 11b of No. 1 and is prevented from rising. Similarly, even if an attempt is made to change the slat 5 from the light blocking position to the lighting position, the chain 14 will not rise, so the position cannot be changed. Chain 1
One end of 4 is attached to the slider 19 at the bottom holder 6.
Connect via. The slider 19 is guided up and down along the groove 7.

A posture switching means 15 is used to switch the posture of the slat 5 via the link 8 and the holder 6.
has. The attitude switching means 15 includes a disk 20 that is rotatably fitted onto the boss of the sprocket 13 and disposed between the sprocket 13 and the outer wall 11a of the bracket 11, and a side surface of the disk 20 facing the sprocket 13. A pair of engagement protrusions 21, 21 for maintaining the light-taking/light-blocking posture protruding from the
It also includes a pair of bosses 23 that protrude outward from the outer wall 11a of the disk 20 in order to fix the interlocking member 22 fixed to the uppermost link 8. A regulating groove 24 is formed in the outer wall 11a to correspond to the operating range of the boss 23. The interlocking member 22 shown in FIG. 5 is made of a metal chain, and a hook hooked to the upper end of the interlocking member 22 is screwed to a boss 23 so as to be able to swing freely.

A locking means 16 is provided which acts on the attitude switching means 15 to selectively lock and hold the slat 5 in a light-enhancing attitude and a light-blocking attitude. This locking means 16 includes a pair of locking arms 2 for maintaining the light-taking/light-blocking posture, which are supported by the outer wall 11a so as to be vertically swingable.
6, 26, and a lock spring 27 which is hooked between both lock arms 26, 26 and urges them into a locked position. A lock groove 2 is provided in the middle of each lock arm 26, 26 to engage with the engagement protrusion 21 of the disk 20 to prevent the disk 20 from rotating back and forth.
8 are each formed with a notch. When one of the pair of lock arms 26 is engaged with the engagement protrusion 21, the other is lifted by the tip of the engagement protrusion 21 to maintain the unlocked position.

In order to switch the postures of the posture switching means 15 and the locking means 16, four adjacent link pins 14a of the chain 14 are protruded toward the disk 20 to form operating protrusions 30. Immediately before the slat 5 is operated from the upper open position to the lower closed position and the lowermost holder 6 is lowered to the closed position, the operating protrusion 30 engages the lock arm 26 for maintaining the lighting posture, as shown in FIG. The position of the operation protrusion 30 is determined so that it starts to make contact.

When in use, a switch (not shown) installed indoors is operated to start or stop the motor 10 and open/close the slat 5.

In the open position, the slats 5 are pulled up toward the upper frame 2 and stored in a stacked state while maintaining the horizontal lighting posture. From this state, move chain 1 to the closed position.
When the slats 4 are fed and moved, the slats 5 are lowered sequentially from the upper side while maintaining the vertical interval determined by the links 8 while maintaining the lighting posture.

Immediately before the lowermost holder 6 finishes lowering, the operating protrusion 30 comes into contact with the tip of the lock arm 26 for maintaining the lighting posture, as shown in FIG. 8, and releases it as shown in FIG. 9. . Leading operation protrusion 3
Even if 0 passes, the next operation protrusion 30 maintains the release position of the lock arm 26 for maintaining the lighting position. Therefore, the operating protrusion 30 brings the lock arm 26 for maintaining the lighting posture into the unlocked position, and while maintaining this state, contacts the side surface of the engagement protrusion 21 for maintaining the lighting posture to rotate the disk 20. . As the disk 20 rotates, the boss 23 also rotates, and the link 8 is operated via the interlocking member 22 to switch the holder 6 and the slat 5 from the light-taking position to the light-blocking position.

As the engaging protrusion 21 for maintaining the light-blocking posture rotates downward, the engagement protrusion 21 for maintaining the light-blocking posture located at the opposite position rotates upward, and as shown in FIG. It moves directly below the lock groove 28 of the lock arm 26. At this time, the lock arm 26 for maintaining the light shielding position is swung downward by the lock spring 27, and its lock groove 28 engages with the engagement protrusion 21 for maintaining the light shielding position to maintain the light shielding position.
The engagement protrusion 21 for maintaining the light shielding position contacts the tip of the locking arm 26 for maintaining the light receiving position near the end of its upward rotation, and swings upward to maintain the unlocked position. That is, when the engaging protrusion 21 engages with one of the lock arms 26,
The other lock arm 26 is maintained in the unlocked position.

If you try to operate the slat 5 in this state to change its posture to the lighting posture, or try to lift the entire slat 5 to the open position, the chain 14
does not move upward, and since the attitude switching means 15 is locked by the locking means 16, the attitude of the slat 5 does not change. Naturally, the attitude of the slats 5 does not change or flap due to wind pressure.

When the motor 10 is reversely rotated from the light shielding position, the lock arm 26 and the engagement projection 21 are operated by the operating projection 30 in the reverse procedure to the above case, and the slat 5 can be switched to the light lighting position. Further, when the motor 10 is operated continuously, the slat 5
is pulled upward to the open position.

[Another embodiment example]

In the illustrated example, the sprocket 13 is rotationally driven by the motor 10, but a mechanism that can manually rotate the sprocket 13 may be added instead of the motor 10 in case of a power outage or the like. It also includes a configuration in which the motor 10 is omitted and the sprocket 13 is rotated only manually.

The attitude switching means 15 and the locking means 16 may be located anywhere on the side of the moving region of the chain 14, and do not necessarily need to be located in the chain-wrapping region of the sprocket 13.

The operation protrusion 30 may be formed of a link plate or another member fixed to the plate instead of using the link pin 14a.

The locking means 16 does not necessarily require a pair of locking arms 26, and may be constructed from a single member as the case may be.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is an explanatory diagram conceptually showing the principle of the slat hoisting mechanism.
Fig. 2 is a front view of the blind, Fig. 3 is a sectional view taken along line A-A in Fig. 2, Fig. 4 is a sectional view taken along line B-B in Fig. 2, and Fig. 5 is a sectional view taken along line C-C in Fig. 2.
6 is a sectional view taken along the line D-D in FIG. 3, FIG. 7 is an exploded perspective view of the hoisting mechanism, and FIGS. 8, 9, and 10 are respective operating states of the hoisting mechanism. FIG. 4... side frame, 5... slat, 6... holder,
8... Link, 10... Motor, 13... Sprocket, 14... Chain, 15... Posture switching means, 16... Locking means, 20... Disk, 2
DESCRIPTION OF SYMBOLS 1... Engagement protrusion, 22... Interlocking member, 26... Lock arm, 27... Lock spring, 28... Lock groove, 30... Operation protrusion.

Claims (1)

[Claims for Utility Model Registration] A holder 6 that is guided up and down by the left and right side frames 4, 4 and supports slats 5 arranged vertically in a horizontal position.
, a front and rear link 8 that connects the vertically adjacent holders 6, 6, a chain 14 connected to the lowest holder 6, and a chain 14 arranged at the top of the left and right side frames 4, 4 to feed and drive the chain 14. Sprocket 13 that can be rotated forward and backward
and a means for driving the sprocket 13; a posture switching means 15 for switching the slat 5 between a light-shielding posture and a daylighting posture; A locking means 16 for alternatively locking is provided. The locking means 16 is provided with a pair of engagement protrusions 21, 21 on one side of the disk 20, and locks the disk 20.
A pair of lock arms 26, 26 that engage the engagement protrusions 21, 21 to prevent rotation of the disk 20 when the disc 20 is rotated to the light-enhancing position and the light-blocking position are urged to swing freely in the direction of the lock position. The operating protrusion 30 for switching the posture switching means 15 and the locking means 16 locks the lock arm 26 just before the lowermost holder 6 finishes lowering or just before changing the angle of the slat 5 from the light shielding position to the lighting position. , 26 in the direction opposite to the biasing direction to release the engagement with the engagement protrusion 21, and engage the other lock arm 26 different from the lock arm 26 that has been engaged up until now. Coupling protrusion 2
1 is engaged with the chain 14, and is disposed on the chain 14 in a position where it can maintain a light-blocking position or a lighting position.