JPH0384191A - Blind shutter link device - Google Patents

Abstract

PURPOSE:To smoothen the opening and closing of all slats by a method in which links for holding, opening, and closing slats are operated synchronously with cranks and bottom crank, and all other crank shafts are connectedly operated by link mechanism for opening and closing slats. CONSTITUTION:Links for holding, opening and closing slats 8 are operated synchronously by upper and lower crank shafts and bottom crank. Both ends of upper and lower stage slats 8 are integrally supported connectedly to the crank shaft 10a, and the intermediate part of the crank arm of the bottom crank is coupled in a vertically movable manner to the circular guide of the first attachment 6 on the lower end of the sprocket engaging chain. The bottom crank arm is turned by vertically moving action along the circular guide hole 16c of a guide pin 6, and all other crank shafts 10a are operated connectedly through a slat opening and closing link mechanism 9. The opening and closing angles of all the slats can thus be smoothly and exactly adjusted.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a blind shutter link device for automatically opening and closing a shutter opening of a building by linking a plurality of upper and lower slats for raising/lowering/opening/closing operations.

[Conventional technology]

A conventional blind shutter opening/closing device includes a pair of left and right guide rails standing upright on both sides of the shutter opening/closing opening, and slats connected in multiple stages above and below to move up and down along these guide rails. There is one in which the slats are automatically raised, lowered, opened and closed. In such a conventional blind shutter opening/closing device, each of the upper and lower slats in multiple stages is raised and lowered in an open state in a horizontal position, and the opening/closing angle of each slat is adjusted by rotation in the lowered position between both guide rails. freely, and
At the raised position between the two guide rails, each slat is housed and held in a superimposed horizontal position.

[Problem to be solved by the invention]

Conventional blind shutter opening/closing devices automatically raise and lower the upper and lower slats in multiple stages in an open horizontal position, and automatically rotate the opening/closing angle of each slat in the lowered position between both guide rails. adjust, and
The device configuration of the operating mechanism and automatic drive system to raise and hold each slat in a superimposed state has become extremely complex, and as a result, the entire device has become larger, restricting the installation locations, and making operations complicated and difficult to use. There were problems such as deterioration of the condition. This invention was made to solve the above-mentioned problems, and uses a simple series of link mechanisms to automatically and smoothly move the slat up and down in a horizontal position and adjust the opening/closing angle of the slat in its lowered position. This blind shutter link device can be used reliably, and the overall structure of the device can be simplified and downsized, reducing costs.There are no restrictions on the installation location, and the blind shutter link device is extremely easy to use. The purpose is to provide

[Means to solve the problem]

The blind shutter link device according to the present invention has a first link connected to and suspended from the lower end of a chain that is meshed with a sprocket for driving the slat at the upper part of the guide rail and hangs down.
a second attachment which is engaged and held so as to be able to move up and down relative to the first attachment; and a second attachment whose upper end is rotatably supported at a fixed point on the upper side of the guide rail and which is moved along the guide rail. a pair of left and right slat suspension link mechanisms that hang down and whose lowermost ends are rotatably connected to the second attachment; It is equipped with a link mechanism for opening and closing the slats, whose upper end is rotatably connected to and suspended from a movable link suspension device energized by the slats.
The slat suspension link mechanism and the slat opening/closing link mechanism include a normal link member and an engaging pawl that removably engages with the link member to regulate the bending and rotation angle of the link when the link is in an extended state. the link members with claws are alternately connected in a bendable and rotatable manner, and the link members and the link members with claws are connected to each other at a plurality of predetermined locations of the slat suspension link mechanism system. The crankshafts of the cranks are rotatably connected to each other, and the bottom end of the slat suspension link mechanism is rotatably connected to the crankshaft of the bottom crank. Both ends of the slat are integrally connected and supported, and the mutually connected portions of the link member and the claw link member at a plurality of predetermined locations of the slat opening/closing link mechanism system are rotatable at the free end of each crank. At the same time, the free end of the bottom crank is rotatably connected to the lowest end of the slat opening/closing link mechanism, and the middle part of the crank arm of the bottom crank is connected to the second
The bottom crank is engaged with an arcuate guide portion provided on the attachment so as to be movable in an arc about the crankshaft of the bottom crank.

[For use]

In the blind shutter link device according to the present invention, a second attachment is engaged with and held by the first attachment suspended from the lower end of the chain so as to be able to move up and down relatively, and the second attachment has a slat suspension. Since loads are acting on the link mechanism, the slat opening/closing link mechanism, the slats, etc., the second attachment is engaged and held in the lowered position with respect to the first attachment due to these loads, In this state, the intermediate engagement portion of the bottom crank arm with respect to the arcuate guide portion of the second attachment engages with the upper end of the arcuate guide portion, and each slat is held in a horizontal state. Therefore, the slats are raised and lowered by driving the sprockets to rotate in the forward and reverse directions while each slat remains in a horizontal state. Therefore, when the sprocket is rotationally driven in the downward direction of the slat, the first attachment moves downward together with the chain, and the second attachment moves downward following this, whereby the slat suspension link mechanism and the slat opening/closing link mechanism each extend and descend. As a result, the slats descend and separate from each other while maintaining their horizontal positions. Then, if the sprocket is stopped when the second attachment touches the ground,
Each of the slats is held in a horizontal position and in a lowered position spaced apart from each other at a predetermined interval. In this downward yield state, when the first attachment is further lowered by the rotational drive of the sprocket, the first attachment is lowered relative to the second attachment which is already in contact with the ground, and the first attachment at this time 1
Due to the downward movement of the attachment, the intermediate engagement portion of the bottom crank arm moves downward along the arcuate guide portion of the second attachment. As a result, the bottom crank rotates around the crankshaft, and the other cranks also rotate in a related manner via the slat opening/closing link mechanism, so that all the slats integrated with the crankshafts rotate. , the opening/closing angle of the slat is adjusted. Furthermore, when the sprocket is reversely driven in the slat upward direction from the slat downward yielding state, the first attachment first moves upward via the chain, and following this, the bottom crank arm midway engaging part moves to the second By moving the arcuate guide part of the attachment upward, each slat rotates to a horizontal state.Next, the second attachment follows the first attachment and moves upward, thereby connecting the slat suspension link mechanism. While the slat opening/closing link mechanism is folded, each of the slats approaches and rises in a horizontal position and is held in an overlapping state. In the above, in the slat downward yielding state, the slat suspension link mechanism and the slat opening/closing link mechanism are maintained at a predetermined link bending angle by the engagement action of the engagement claws of the respective claw link members. Therefore, each link of the slat suspension link mechanism and the slat opening/closing link mechanism can be rotated smoothly and reliably in the bending direction or the extension direction when the slat is lifted and lowered, thereby preventing the slat from yielding. The opening/closing angle adjustment of the slats, etc. can be automatically and smoothly performed in the current state.

【Example】

Hereinafter, one embodiment of the present invention will be described based on the drawings. In Figs. 1 to 4, l denotes a pair of left and right guide rails erected on both sides of the blind shutter opening/closing opening, and these guide rails 1 are vertically elongated on mutually opposing surfaces as shown in Fig. 5. Opening slat guide hole 1a
A guide pad 1b is attached to the opening edge of the slat guide hole 1a. A storage box 2 with a slat drive system is provided above the guide rail l. Inside this storage box 2, a pair of left and right sprockets 3 for raising/lowering/opening/closing the slats, which are driven in forward and reverse rotation by a slat opening/closing machine (not shown), and a link suspension means 4 for suspending the slat connecting link system are arranged. has been done. A chain 5 meshes with the sprocket 3, and the chain 5 hangs down within the guide rail 1 and is moved up and down by the forward and reverse rotation of the sprocket 3. The illustrated chain 5 allows bending in a direction along the outer periphery of the sprocket 3, but on the opposite side, a push-pull chain is used that restricts bending beyond a linearly extended state. A first attachment (elevating plate) 6 is connected to the lower end of the push-pull chain 3, and the detailed configuration of this attachment 6 will be described later. On the other hand, the link hanging means 4 includes a fixed side link hanging tool 4A fixedly fixed to the inner wall of the storage box 2 as shown in the second figure, and a middle part of the fixed side link hanging tool 4A has a pin (rivet). ) A bending lever-shaped movable link hanger 4B rotatably supported by the PI, and their detailed shapes and related structures are shown in FIGS. 6 to 9. The upper end of the uppermost link 71 of the slat suspension link mechanism 7 is connected and suspended by the pin P1 to the fixed side link suspension tool 4A so as to be rotatable at a fixed point. Here, the specific illustrated configuration of the slat suspension link mechanism 7 will be described. This slat suspension link mechanism 7 includes the uppermost link (normal link member) 7 made of a normal flat link.
For the free end of 1, attach a link with a relay claw (
link member with claw) 72 and normal relay flat link 73
A plurality of links are sequentially and alternately connected, and a lowermost link with claws 74 having the same shape and configuration as the relay link with claws 72 is connected as the lowermost link. More specifically, the uppermost link 71 and the next lower relay claw link 72 are rotatably connected by a link pin (rivet) P2, and the relay claw link 72 and the next lower relay flat link 73 are rotatably connected to each other by a crankshaft 10a of a crank lO, which will be described later, and in the same manner, the next lower relay pawl link 72 and relay flat link 73 are alternately connected to each other by the link pin P2 and the crankshaft 10a. is rotatably connected to. Each of the plurality of relay claw links 72 and the lowermost claw links 74 has engaging claws 72a and 74a integrally formed at their upper ends in the states shown in FIGS. 1 to 3. These engaging claws 72a and 74a are connected to the uppermost link 71 and the uppermost link 71, respectively, when the slat suspension link mechanism 7 is in a drooping and extended state at a predetermined bending angle as shown in FIGS. 1 to 3. It abuts and engages with each negative side edge of each relay flat link 73. Therefore, each of the engaging claws 72a, 74a maintains the slat suspension link mechanism 7 in a downwardly extended state at a predetermined bending angle, and prevents the slat suspension link mechanism 7 from extending further in the vertical direction. This is a link rotation regulation means. Further, a bottom crank 11 (to be described later) is attached to the lower end of the lowermost claw link 74 as shown in FIGS. 1O and 11.
Attachment mounting plate 75 via the crankshaft 11a of
are connected. In the slat suspension link mechanism 7 configured as described above, the relay claw link 72 and the relay flat link 73
The crankshaft 10a connects the lowermost pawl link 74 and the attachment mounting plate 75 in a bendable and rotatable manner, and the crankshaft 11a connects the lowermost pawl link 74 and the attachment mounting plate 75. are integrally connected. The connecting means will be explained below with reference to FIGS. 13 and 14. A pair of horizontally elongated engaging protrusions 8a are integrally provided on the back surface of each of the slats 8 and are spaced apart from each other in parallel at the center thereof. It becomes. The bent end portion of the horizontally elongated engagement protrusion 8a includes:
Engagement grooves 12a provided on both sides of the rotation support shaft connecting slat piece 12 are slidably fitted. Further, in the slat piece 12, a square-shaped fitting convex portion 12b is integrally protruded from the center thereof, and a notched engagement portion 12c is provided on the outer wall portion of the engagement groove 12a. . A rectangular hole 13b having an oblong rectangular shape provided in a flat mounting piece 13a integral with the crankshafts 10a and lla is fitted and engaged with the fitting convex portion 12b of the slat piece 1''2. In this state, the slat piece 12 has the crankshaft 10a,
A presser cap 14, which clamps and fixes the mounting piece 13a of FIG. 14, is removably attached as shown by the two-dot chain line in FIG. As shown in FIGS. 15(^) to 15(C), this presser cap 14 includes bent pieces 14a formed on both upper and lower sides, and an engaging claw formed in a notch at one end of the bent pieces 14a. Part 14b
and a bent portion 14c at one end formed in the vicinity of the engaging claw portion 14b. By slidingly fitting the bent piece portion 14a of the presser cap 14 into the engaging groove 12a of the slat piece 12, the engaging claw portion 14b is inevitably elastically fitted into the notch engaging portion 12c of the slat piece 12. At this time, the bent portion 14c at one end of the presser cap 14 abuts against the end of the mounting piece 13a of the rotary support shaft 13 and functions as a stopper, thereby causing the engaging claw portion to close. 14b and the notch engaging portion 12c are reliably maintained in an engaged state. In this manner, the crankshafts 10a and lla are removably connected and fixed to the center portions of both ends of the slat 8 by the slat piece 12 and the presser cap 14. As shown in FIG. 2, FIG. 5, FIG. 17, and FIG. 18, a crank arm is connected to the tip of the crankshaft 10a through a mutually connected portion of a relay claw link 72 and a relay flat link 73. 10b are connected. In this case, as shown in FIG. 18, by press-fitting a connecting pin P4 into the inside of the cylindrical end portion of the crankshaft 10a, the connecting pin P4 connects the relay claw link 72 and the relay flat link 73. In addition to being rotatably connected, the crankshaft 1
0a and crank arm lOb are integrally connected. In addition, for the bottom crankshaft 11a, Fig. 1O~
As shown in Figure 12, the upper end of the attachment mounting plate 75 is rotatably fitted and connected to the crankshaft 10.
As in case a, there is a connecting bottle P5 inside the cylindrical shaft at the tip.
is press-fitted. By this connecting pin P5, the bottom crankshaft 11
The lower end of the lowermost pawl link 74 is rotatably connected to the tip of a, and at the same time, the bottom crankshaft 11a and the bottom crank arm llb are integrally connected. A guide bin P6 is integrally provided in the middle of the bottom crank arm llb. In the above, each free end of the crank arms 10b, llb is provided with a slat opening/closing link mechanism 9, which will be described later.
The crank pin (rivet) P7 (see Figures 2 and 5; see Figures 10 to 12, 16, and 17) for rotatably connecting the links is now installed. There is. On the other hand, at one end of the movable link hanging tool 4B, a bottle P
3, the uppermost link 91 of the slat opening/closing link mechanism 9 is rotatably connected. Further, the movable link hanger 4B is urged by a spring (biasing means) S in a direction to raise the slat opening/closing link mechanism 9. As in the case of the slat suspension link mechanism 7, the slat opening/closing link mechanism 9 is connected to the free end of the top link 91, which is a normal flat link, with a relay claw link for regulating the rotation angle. 92 and a plurality of ordinary relay flat links 93 are sequentially and alternately connected, and the lowermost link is the same as the above-mentioned relay claw link 92.
It has a link configuration in which the lowermost hooked links 94 of the shape are connected. Here, in FIGS. 1 to 3, the lower end of the uppermost II ink 91 and the upper end of the next lower relay claw link 92 are rotatably connected with a normal pin (rivet) P8,
The lower end of the relay claw link 92 and the upper end of the next lower relay flat link 93 are rotatably connected by the crank pin P7 of the crank arm 10b, and in the same manner, the lower relay flat link 93 and relay claw link 92 are alternately rotatably connected by pin P8 and crank pin P7, and the lower end of the lowest claw link 94 is connected to crank pin P at the tip of bottom crank arm llb.
They are rotatably connected at 7. Therefore, the crank 10 connects the slat 8 of the seven systems of slat suspension link mechanisms, the relay pawl link 72, and the relay flat link 73 through its crankshaft 10a.
are connected coaxially, and the crank arm 1
0b rotatably connects each of the relay pawl links 92 and the relay flat links 93 of the nine systems of slat opening/closing link mechanisms. The bottom crank 11 connects the lowest claw link 74 of the seven slat suspension link mechanisms to the attachment mounting plate 75 and the lowest claw link 94 of the nine slat opening/closing link mechanisms. Further, the first attachment 6 connected to the lower end of the push-pull chain 3 has a second attachment (
Lifting/lowering plates) 16 are attached so as to be mutually slidable in the vertical direction. Therefore, the related structure of the first attachment 6 and the second attachment 16 will be explained below. First, the first attachment 6 is integrally provided with upper and lower lifting pins 6A and 6B that protrude toward the second attachment 16 side, and a horizontal notch engages near the lower lifting pin 6B. Section 6C (see Figure 3 and Figure 19)
is formed. On the other hand, the second attachment 16 is provided with an upper longitudinally elongated guide hole 16a, a lower longitudinally elongated guide hole 16b, and an arcuate guide hole 16c in the longitudinal direction. Further, an upper roller R1 and a lower roller R2 are rotatably supported on the second attachment member 16, respectively. And the lifting pins 6A, 6 of the first attachment 6
B is the upper vertical guide hole 16 of the second attachment 16
a and the lower longitudinally elongated guide hole 16b, respectively, so as to be slidable up and down, and thereby the second attachment 16 is attached to the first attachment 6 so as to be slidable up and down relative to each other. Therefore, the second attachment 16 moves up and down relative to the first attachment 6 by strokes Ll and L2 (see FIG. 19), which are equivalent to the longitudinal dimensions of the upper longitudinal guide hole 16a and the lower longitudinal guide hole 16b. It is possible to move. Note that the above stroke L1. L2 is Ll-L
There is a relationship between 2. Furthermore, no matter what vertical position the second attachment 16 is in with respect to the first attachment 6, the notch engaging portion 6C of the first attachment 6 and the arcuate guide hole 16c of the second attachment 16 are always connected. They are provided in a cross-communicating positional relationship. In this way, the second attachment 16 attached to the first attachment 6 includes the images shown in FIGS.
As shown in FIGS. 4 and 22, the lowermost attachment mounting plate 75 of the seven systems of slat suspension link mechanisms is fixedly mounted. At the time of installation, the slat suspension link mechanism 7
The intermediate guide pin P6 of the bottom crank arm llb, which interlocks the lowest claw link 74 of the system and the lowest claw link 94 of the slat opening/closing link mechanism 9 system, connects the notch engaging portion 6C and the circular arc guide. The holes 16c are slidably inserted into and engaged with the mutually intersecting communication portions. Therefore, due to the relative vertical sliding movement between the first attachment 6 and the second attachment 16, the guide pin P6 moves up and down along the arcuate guide hole 16c, and this vertical movement causes the bottom crank arm llb
rotates around the bottom crankshaft 11a, and its rotational force is transmitted to all other cranks 10 via the slat opening/closing link mechanism 9, and these crankshafts 10a rotate in relation to each other. As a result, the opening and closing angles of all the slats 8 are automatically adjusted. Next, the operation will be explained. First, in the raised and open state of the blind shutter shown in FIG.
are the upper and lower vertical guide holes 16 of the second attachment 16
the second attachment 16 by engaging the upper ends of the
is being lifted. As a result, the movable link hanging tool 4B
is held in a rotationally displaced state by the biasing force of the spring S, the slat opening/closing link mechanism 9 and the slat suspension link mechanism 7 are each folded, and each slat 8 is held superimposed in the horizontal open state. ing. When the blind shutter is in the raised and open state,
When sprocket 3 is rotated counterclockwise,
First attachment 6 with push-pull chain 3
As the second attachment 16 moves downward, the second attachment 16 follows this downward movement. This lowering movement of the second attachment 16 causes the slat suspension link mechanism 7 and the slat opening/closing link mechanism 9 to
As the slats 8 follow along and extend downward, each of the slats 8 sequentially descends and separates from the lowest slat 8 while maintaining a horizontal position, and when the lower roller R2 comes into contact with the ground, each of the slats 8 becomes as shown in FIG. As shown, the blind shutters are in a lowered state in which the blind shutters are held in the horizontal open position with a predetermined interval between them. At this point, the sprocket 3 stops driving. In the blind shutter lowering state, the movable link hanger 4B is still held in a rotationally displaced state by the biasing force of the spring S, and the lifting pin 6A of the first attachment 6. 6B and bottom crank arm llb guide pin P
6 is the vertically elongated guide hole 1 of the second attachment 16
6a, 16b and the upper ends of the arcuate guide holes 16c. In the blind shutter lowering state shown in FIG. 3, when the sprocket 3 is further rotated counterclockwise, the push-pull chain 3 and the first
The attachment 6 moves downward. At this time, the second attachment 16 is stopped because the lower roller R2 is already in contact with the ground. Therefore, at the same time that the lifting pins 6A and 6B integrated with the first attachment 6 move downward along the vertically elongated guide holes 16a and 16b of the second attachment 16,
The guide pin P6 engaged with the notch engaging portion 6C of the first attachment 6 moves downward along the arcuate guide hole 16c of the second attachment 16. In this way, as the guide pin P6 moves downward (arc movement in the downward direction) along the circular guide hole 16c, the bottom crank arm llb, which integrally has the guide pin P6, rotates the crankshaft 11a. Rotates downward as the center of motion. Due to the downward rotation of the bottom crank arm llb, each link of the slat opening/closing link mechanism 9 is pulled in the downward direction, so that the movable link hanger 4B rotates about the pin P1 against the spring S. Accordingly, each link of the slat opening/closing link mechanism 9 moves downward. At this time, all the crankshafts 10a, 11a rotate as the other cranks 10 rotate in relation to each link of the slat opening/closing link mechanism 9. Accordingly, each slat 8 integrally connected to each of the crankshafts 10a and lla operates to close, and the guide bin P6
When the slats 8 reach the lowest end of the arcuate guide hole 16c, the slats 8 are fully closed as shown in FIG. Therefore, when the blind shutter is in the lowered state and the slat 8 is fully closed as shown in FIG. By controlling by operating a switch or the like, it is possible to adjust the opening/closing angle of each slat 8 when the blind shutter is in the lowered state. In addition, in order to change the blind shutter lowered state with the slats 8 fully closed as shown in FIG. 1 to the blind shutter raised state with the slats 8 superimposed in a horizontal position as shown in FIG. 4, the sprocket 3 must be rotated clockwise. It is only necessary to rotate it in the direction. That is, in the state shown in FIG. 1, when the sprocket 3 is driven to rotate in the clockwise direction, the first attachment 6 first moves upward via the pressable chain 3. As a result, the lifting hinge 6 on the first attachment 6 side
A and 6B move up and down the vertically elongated guide holes 16a and 16b of the second attachment 16, and the guide pin P6 moves up along the arcuate guide hole 16C, so that the bottom crank arm 11b rotates upward, and its bottom As the crank 11 and the other cranks 10 together rotate upward, all the slats 8 are first opened to a horizontal position as shown in FIG. Even in this state, the first attachment 6
continues its upward movement, the lifting pin 6A
, 6B and guide pin P6 are connected to the vertically elongated guide hole 1.
6a, 16b and the upper ends of the arcuate guide holes 16c, respectively, and lift the second attachment 16. As a result, the slat suspension link mechanism 7 and the slat opening/closing link mechanism 9 bend and open and move upward while the slats 8 maintain their horizontal positions, so that the slats 8 are brought close to each other while maintaining their horizontal positions. As a result, the blind shutter becomes in the raised open state shown in FIG.

【Effect of the invention】

As described above, according to the present invention, it is composed of a combination of a long lat suspension link mechanism and a slat opening/closing link mechanism, and the links at a plurality of predetermined locations are interlocked with each other by cranks at a plurality of upper and lower locations and a bottom crank. The two ends of the upper and lower slats are integrally connected and supported by the crankshafts, and the middle part of the crank arm of the bottom crank is connected to the first part of the lower end of the sprocket engagement chain.
The second attachment is slidably held relative to the second attachment, and is engaged with the arcuate guide portion of the second attachment so that it can be moved up and down. A reliable link operation can be obtained, and the slat lifting operation when the slat is horizontal and the opening/closing angle adjustment of the slat when the slat is lowered can be easily and automatically performed only by controlling the rotation of the sprocket. Since the configuration is simple and the entire device can be simplified and made compact, there are no restrictions on where the blind shutter can be installed, and costs can be reduced.

[Brief explanation of drawings]

Fig. 1 shows the constituent countries of the blind shutter opening/closing device according to an embodiment of the present invention in the slat closed state in the slat lowered position, Fig. 2 is a front view of Fig. 1, and Fig. 3 shows the slat lowered in Fig. 1. FIG. 4 is an explanatory diagram of the operation showing the slat in the open state, FIG. 5 is a cross-sectional view of the guide rail, FIG. 6 is a front view of the link suspension means, and FIG. The figure is a plan view of Fig. 6, Fig. 8 is a side view of Fig. 6, Fig. 9 is an enlarged sectional view taken along line IX-IX of Fig. 6, and Fig. 1
Figure 0 is a front view of the bottom crank part, Figure 11 is the 10th
12 is an enlarged sectional view taken along the line XII-XII in FIG. 11; FIG. 13 is a back view of the slat; FIG. 14 is a sectional view taken along the line
A) is a back view of the presser cap, FIG. 15(B) is a front view of the same, FIG. 15(C) is an end view of the same, FIG. 16 is a front view of the intermediate crank part, and FIG. 17 is a view of the same as in FIG. Side view, No. 18
The figure is an enlarged cross-sectional view taken along the line A-A in FIG. 17, FIG. 19 is a front view of the lower operating lifting mechanism, and FIG. 20 is a side view of FIG. 19.
FIG. 21 is an enlarged cross-sectional view taken along the line B--B in FIG. 19, and FIG. 22 is a front view of the lower operating lifting mechanism shown in FIG. 19 with a bottom crank attached thereto. 1... Guide rail, 3... Sprocket, 4B.
... Movable link hanging device, 5... Chain, 6... First attachment, 7... Link mechanism for slat suspension, 8... Slat, 9... Link mechanism for opening and closing the slat, 10 ...Crank, 10a...Crankshaft,
11...Bottom crank, Ila...Bottom crank shaft, llb...Bottom crank arm, 16...
・Second attachment, 16c...Circular guide hole (
Arc guide part), P6...Guide pin (midway part of crank arm), 71.91...Top link (normal link member), 72.92...Link with relay claw (link member with claw) , 73.93... Relay flat link (normal link member), 74.94... Lowermost claw link (claw link member) 72a, 74a... Engaging claw portion. Patent applicant Bunka Shutter Co., Ltd.
Part 2 Lumitter Engineering Co., Ltd. 20th R2

Claims (1)

[Claims] In a blind shutter link device that connects and supports multiple stages of upper and lower slats that are driven up and down along a pair of left and right guide rails that are placed upright on both sides of the shutter opening/closing opening, the slats that are placed above the guide rails are used to drive the slats up and down. A first attachment is connected and suspended from the lower end of the chain that meshes with the sprocket of the chain and hangs down along the guide rail, and a second attachment is engaged and held so as to be able to move up and down relative to the first attachment. and a pair of left and right attachments whose upper ends are rotatably supported at a fixed point on the upper side of the guide rail, hang down along the guide rail, and whose lowermost ends are rotatably connected to the second attachment. A link mechanism for suspending the slats, a movable link suspension that is rotatably supported on the upper part of the guide rail, and a slat whose upper end is rotatably connected to the movable link suspension and is suspended. a link mechanism for
A biasing means for biasing the movable link suspension in the upward direction of the slat opening/closing link mechanism, and the slat suspending link mechanism and the slat opening/closing link mechanism include a normal link member and a A link member with a claw provided with an engaging claw portion that removably engages with the member and regulates the bending and rotating angle of the link in the extended state is alternately connected in a bendable and rotatable manner, and , the link member and the claw link member at a plurality of predetermined locations of the slat suspension link mechanism system are rotatably connected to each other by a crank shaft of a crank, and the lowermost end of the slat suspension link mechanism is connected to each other by a crank shaft of a crank. The crankshaft of the bottom crank is rotatably connected to the part, and both ends of the upper and lower slats are integrally connected and supported to each of the crankshafts. The mutually connected parts of the link member and the claw link member are rotatably connected at the free ends of the respective cranks, and the free end of the bottom crank is rotated to the lowest end of the slat opening/closing link mechanism. The middle part of the crank arm of the bottom crank is engaged with the circular guide part provided on the second attachment so as to be movable in a circular arc about the crankshaft of the bottom crank. A blind shutter link device characterized by: