JP6739843B2 - Middle pillar fixing device and shutter device - Google Patents

Description

The present invention relates to a center column fixing device and a shutter device for fixing a center column of a shutter device.

The background art will be described below. FIG. 7 is a schematic view of a center column fixing device according to a conventional embodiment. As shown in FIG. 7, the locking mechanism L is provided with a pin 111 protruding from the peripheral surface of the rod 104b and retracts when pressed by the pin 111 from above, so that the drop rod 104 is completely inserted into the engagement hole 103. The latch bolt 113 is configured to spring out again when the force of the pin 111 is removed and the force of the pin 111 is removed. The latch bolt 113 is provided with an unlocking operator 114 protruding outside the lock case 106. There is. The pin 111 is projected at the same height as the pin 115 projecting on the rod 104b in order to elastically contract the spring 107. In the unlocked state, the pins 111 and 115 are elastic due to the spring 107 and the lock case 106 is locked. It is pressed against the upper surface of the inside and acts as a stopper that prevents the drop rod 104 from coming out of the lock case 106. The spring catch 112 is located between the rods 104a and 104b and is supported by a pair of brackets 116 and 116 fixed to the inner wall of the lock case 106 so as to be slidable from side to side, and a tip of the latch bolt 113. And a spring 117 for urging the portion to advance to a position orthogonal to the rod 104b. At the tip of the latch bolt 113, an inclined surface 118 is formed which converts a vertical force acting downward from above into a horizontal force. Further, the unlocking operator 114 is provided so as to project from the peripheral surface of the latch bolt 113, penetrates the wall surface of the lock case 106, and projects to the front side of the lock case 106. In addition, a long hole for sliding the unlocking operator 114 to the left and right is formed on the wall surface of the lock case 106. Further, on the back surface side of the lock case 106, an angle fitted to the lower end of the center pillar is integrally formed.

First, the lower end of the middle pillar is fitted into the angle of the lock case 106, and the entire device is attached to the middle pillar. In this state, the center pillar is erected on the floor, and the drop rod 104 is pushed down to drop the left and right rods 104a and 104b into the engaging holes of the receiving seat. As a result, the pin 111 projecting from the rod 104b engages with the inclined surface 118 formed at the tip of the latch bolt 113 from above, and causes the latch bolt 113 to retreat against the elasticity of the spring 117. When the latch bolt 113 is retracted so as to be completely separated from the pin 111, the pin 111 passes through the tip of the latch bolt 113 and further descends, and at the same time, the force of the pin 111 acting on the latch bolt 113 is released. As a result, the latch bolt 113 pops out vigorously by the elastic force of the spring 117, and at that time, a very large and clear locking sound called "kacha" is emitted. As a result, it is possible to easily confirm whether or not the dropping rod 104 has been completely pushed down to be in the locked state. That is, when the locking sound is not generated even when the drop rod 104 is pushed down with full force, it is sensuously sure that dust or dirt is accumulated in the engaging hole of the receiving seat and the complete locked state is not obtained. Since it is possible to detect it, it is possible to prevent an accident in which the center pillar is disengaged due to poor locking. To release the locked state, the latch rod 113 is simply slid in the horizontal direction away from the pin 111 by the unlocking operator 114 provided on the latch bolt 113. It is lifted in the unlocking direction f by the elasticity of. The locking mechanism L configured as described above is an extremely simple one including a pin 111 protruding from the rod 104b of the drop rod 104 and a spring catch 112 having an unlocking operator 114 protruding from the latch bolt 113. There is (see Patent Document 1).

Japanese Utility Model Publication No. 6-16092

Conventionally, the depth of the guide port that is fitted and fixed to the upper part of the center pillar is 18 to 25 mm, and although it is easy to remove, it is not enough to fix the lower part of the center pillar with a dropping rod. It seemed necessary to fix the upper part as well. In this way, the center column may be bent by the force of the wind, and the top end of the center column may come off the guide opening.
It is an object of the present invention to provide a central column fixing device and a shutter device that can prevent the central column from coming off due to external pressure.

The invention according to claim 1, the first, respectively the upper left locking pin and the first right locking pin is provided, a first fitting the engaging hole circle two right and left formed under side A lower metal rod and two left and right upper metal rods each provided with a second left locking pin and a second right locking pin at the lower end and fitted into a second engaging hole formed above; The upper ends of the two left and right lower metal rods and the lower ends of the left and right upper metal rods are connected to each other, and the left and right upper metal rods are provided on the opposite side to the moving direction of the left and right lower metal rods. And a relay mechanism for moving a rod, which is a center column fixing device for fixing the center column of a shutter device , wherein the relay mechanism slidably engages the first left locking pin at both ends thereof. A first link plate provided with a locking hole to be fitted and a locking hole into which the second right locking pin is slidably engaged, and the first right locking on both ends, respectively. A second link plate provided with a locking hole into which the pin is slidably engaged and a locking hole into which the second left locking pin is slidably engaged; In the center column fixing device, the first link plate and the second link plate are arranged so as to be rotatable about a common rotation axis at their respective central portions .

According to a second aspect of the present invention, in the center column fixing device according to the first aspect, a handle formed by connecting the two left and right lower metal rods, and a lock mechanism for preventing upward movement of the handle. And are further provided.

According to a third aspect of the present invention, in the center column fixing device according to the second aspect, the first adjusting mechanism for adjusting the distance between the left and right lower metal rods and the left and right upper metal rods are provided. And a second adjusting mechanism for adjusting the distance.

The invention according to claim 4 is a shutter device including a center pillar and a center pillar fixing device for fixing the middle pillar , wherein the middle pillar fixing device has a first left locking at each upper end. A pin and a first right locking pin are provided, and two left and right lower metal rods that fit into the first engaging holes formed below, and a second left locking pin and a second left locking pin at the lower end, respectively. Two right and left upper metal rods provided with a right locking pin and fitted in a second engaging hole formed above , upper ends of the left and right lower metal rods, and the left and right upper metal rods. And a relay mechanism that connects the lower ends of the two upper and lower metal rods to the opposite side to the direction in which the two lower metal rods move to the left and right, and the relay mechanism is provided at both ends. A first link plate provided with a locking hole into which the first left locking pin is slidably engaged and a locking hole into which the second right locking pin is slidably engaged. And a locking hole into which the first right locking pin is slidably engaged and a locking hole into which the second left locking pin is slidably provided, respectively, at both ends. And a second link plate that is provided such that the first link plate and the second link plate are arranged so as to be rotatable about a common rotation axis at respective central portions. a shutter device there.

According to the present invention, it is possible to provide a central column fixing device and a shutter device that can prevent the central column from coming off due to external pressure.

It is a schematic diagram of a shutter provided with a middle pillar fixing device concerning a 1st embodiment of the present invention. It is a schematic diagram of the center pillar fixing device concerning a 1st embodiment of the present invention, (a) is a front view and (b) is a side view. It is a schematic diagram of an upper part fixing mechanism of a middle pillar fixing device concerning a 1st embodiment of the present invention, (a) is a front view and (b) is a side view. It is the schematic of the relay mechanism of the center pillar fixing device which concerns on the 1st Embodiment of this invention, (a) is a front view, (b) is sectional drawing of the A direction shown in (a), (c) is a. It is a schematic front view of the relay mechanism which concerns on 2nd Embodiment. The outline of the lower part fixing mechanism of the center pillar fixing device concerning a 1st embodiment of the present invention is shown, (a) is a top view and (b) is a side view. The outline of the lower part fixing mechanism of the middle pillar fixing device concerning a 1st embodiment of the present invention is shown, (a) is a front view and (b) is a side view. It is a schematic diagram showing a middle pillar fixing device concerning a conventional embodiment.

<First Embodiment>
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view of a shutter including a center pillar fixing device according to a first embodiment of the present invention, and FIG. 2 is a schematic view of a middle pillar fixing device according to a first embodiment of the present invention. Yes, (a) is a front view, (b) is a side view, and FIG. 3 is a schematic view of an upper fixing mechanism of the center pillar fixing device according to the first embodiment of the present invention. ) Is a front view and (b) is a side view.
As shown in FIG. 1, FIG. 2, and FIG. 3, the center pillar fixing device 1 includes at least two left and right shutter surfaces 3 formed by connecting a plurality of slats 2 vertically, and two shutter surfaces left and right. The lower fixing mechanism 5, the upper fixing mechanism 6, and the relay mechanism 7 are provided along the inner side surface (inside the room) 4a of the middle pillar 4 that is provided between the third and third portions and are perpendicular to the ground.
The lower fixing mechanism 5 is formed by connecting two left and right linear lower metal rods 5a and 5a provided along the inner side surface 4a of the center pillar 4 and upper portions 5aa and 5aa of the lower metal rods 5a and 5a. A handle 5c provided at a height of 400 to 1000 mm, and a lock mechanism 5db that slidably guides the vertical movement of the handle 5c and prevents the handle 5c from moving upward. A first upper mechanism 5d having a guide hole 5da for slidably guiding the vertical movement of the handle 5c, and lower protrusions 5b formed at the lower ends of the two left and right lower metal rods 5a, 5a. 5b, a fitting mechanism 5j having an engagement hole 5ja formed so that these lower protrusions 5b, 5b can be inserted, and further, the lower protrusions 5b, 5b can be slidably moved in the vertical direction. A first lower mechanism 5e having guide holes 5ea, 5ea, 5ea, 5ea for guiding is provided.

Further, below the first upper mechanism 5d, a third adjusting mechanism 5h capable of adjusting the distance between the left and right two lower metal rods 5a, 5a is provided.
Further, below the first lower mechanism 5e, there is provided a first adjusting mechanism 5g capable of adjusting the distance between the two left and right lower metal rods 5a, 5a.
Further, the upper fixing mechanism 6 includes two right and left linear upper metal rods 6a, 6a provided along the inner side surface 4a of the center pillar 4, and an upper protrusion provided on the upper ends of the upper metal rods 6a, 6a. A second upper mechanism 6e having parts 6b, 6b and guide holes 6ea, 6ea, 6ea, 6ea for slidably guiding the upward movement of these upper protrusions 6b, 6b; Of the upper metal rods 6a, 6a, and upper end protrusions 6b, 6b respectively formed on the upper ends of the upper metal rods 6a, 6a, and a fitting mechanism 6j having an engagement hole 6ja into which the upper protrusions 6b, 6b can be inserted, Further, at the lower end of the upper fixing mechanism 6, it is possible to move the upper protruding portions 6b, 6b in the vertical direction and the relay mechanism 7 having the guide holes 7ea, 7ea, 7ea, 7ea, and the second upper mechanism. A second adjusting mechanism 6g which is provided above 6e and is capable of adjusting the distance between the two left and right upper metal rods 6a, 6a of the upper projecting portions 6b, 6b is provided.
Since the upper reinforcing portion 6f and the lower reinforcing portion 5f that movably reinforce the upper metal rod 6a and the lower metal rod 5a are fixed to the center pillar 4 by welding or screws, the strength of the center pillar 4 itself is improved. ..
Further, although the lower protrusion 5b and the upper protrusion 6b provided on the lower fixing mechanism 5 and the upper fixing mechanism 6 use the dropping rod 8 and the push-up rod 9, respectively, the lower protruding portion 5b and the upper protrusion 6b are dropped. The rod 8 and the push-up rod 9 are integrally joined. The lower protruding portion 5b at the lower end of the lower metal rod 5a is also the lower end of the dropping rod 8. The upper protrusion of the upper end of the upper metal rod 6a is also the upper end of the push-up rod 9.

4A and 4B are schematic views of a relay mechanism of the center pillar fixing device according to the first embodiment of the present invention, where FIG. 4A is a front view, FIG. 4B is a sectional view in the C direction shown in FIG. c) is a schematic front view of the relay mechanism according to the second embodiment, FIG. 5 shows an outline of a lower fixing mechanism of the center pillar fixing device according to the first embodiment of the present invention, and (a) is 1 is an enlarged front view of part A shown in FIG. 1, (b) is a side view, and FIG. 6 shows an outline of a lower fixing mechanism of the center pillar fixing device according to the first embodiment of the present invention, (a) FIG. 2 is an enlarged front view of a B part shown in FIG. 1, and (b) is a side view.
As shown in FIG. 4, the relay mechanism 7 is provided with a first link plate 7a and a second link plate 7b that are overlapped with each other, and the substantially center position of each is rotatably positioned by a central shaft 7c. Has been done. Further, the first link plate 7a is provided with locking holes 7aa, 7aa at both ends thereof. Further, the second link plate 7b is provided with locking holes 7ba, 7ba at both ends thereof. Further, inside the relay mechanism 7, locking pins 5aba and 5aba are provided on the upper ends 5ab of the lower metal rods 5a and 5a, and locking pins 6aba and 6aba are provided on the lower ends 6ab of the upper metal rods 6a and 6a. ..
Of the locking pins 5aba and 5aba, one locking pin 5aba is slidably engaged with the locking hole 7aa of the first link plate 7a, and the other locking pin 5aba of the second link plate 7b. It is slidably engaged with the locking hole 7ba. The protruding lengths of these two locking pins 5aba and 5aba are set so as to match the overlapping positions of the first link plate 7a and the second link plate 7b, respectively.
Further, of the locking pins 6aba and 6aba, one locking pin 6aba is slidably engaged with the locking hole 7aa of the first link plate 7a, and the other locking pin 6aba is the second link plate. It is slidably engaged with the locking hole 7ba of 7b. These two locking pins 6aba and 6aba have their respective projecting lengths set so as to match the overlapping positions of the first link plate 7a and the second link plate 7b, respectively.
A lock mechanism 5db is fixed to the first upper mechanism 5d by screwing or welding on the first upper mechanism 5d. The lock mechanism 5db includes a lock hole 5dba, a lock pin 5dbb, a lock knob 5dbc, and a lock slide frame 5dbd. The lock hole 5dba is cut inside one of the lower metal rods 5a, and the lock pin 5dbb is inserted into and removed from the lower metal rod 5a to control the vertical movement of the handle 5c. A lock knob 5dbc is attached to the lock pin 5dbb, and the lock knob 5dbc is manually moved to the left and right. The lock knob 5dbc is provided so as to protrude from the lock slide frame 5dbd.
The second upper mechanism 6e, the upper reinforcing portion 6f, the relay mechanism 7, the first upper mechanism 5d, the lower reinforcing portion 5f, and the first lower mechanism 5e are screwed to the inner side surface 4a of the center pillar 4. (Not shown) or fixed by welding (not shown).

Next, the operation of the center pillar fixing device according to the first embodiment will be described.
The relay mechanism 7 interlocks the operations of the lower protruding portion 5b provided on the lower fixing mechanism 5 and the upper protruding portion 6b provided on the upper fixing mechanism 6, and when the handle 5c is pushed down, the lower metal bar is pushed. At the same time as 5a descends, the upper metal rod 6a ascends. At this time, the lower protrusion 5b fits into the engagement hole 5ja, and at the same time, the upper protrusion 6b fits into the engagement hole 6ja.
As shown in FIGS. 5 and 6, when the lower protrusions 5b, 5b and the upper protrusions 6b, 6b are fitted into the upper and lower engagement holes 5ja, 6ja, the manual slide type lock mechanism 5db is locked. As a result, the upper and lower ends of the center pillar 4 are firmly fixed to the shutter frame (not shown), and the lower protrusion 5b and the upper protrusion 6b move up and down in the fitting mechanism embedded in the shutter frame. It is not engaged and is not easily disengaged because it is locked by the vertical movement.
Conversely, when the handle 5c is pulled up, the lower metal rod 5a rises and at the same time the upper metal rod 6a descends. At this time, the lower protrusion 5b is removed from the engagement hole 5ja, and at the same time the upper protrusion 6b is removed from the engagement hole 6ja, so that the center pillar 4 can be easily removed. The handle 5c provided can be stably moved to a predetermined place.

Further, as shown in FIG. 1, the center pillar fixing device 1 is provided with at least two left and right shutter surfaces 3 formed by vertically connecting a plurality of slats 2, 2,... It is provided along the inner side surface 4a of the center pillar 4 which is vertically provided between the surface 3 and the ground (floor surface) direction. The middle pillar 4 is provided between the shutter case 10 that houses the shutter surface 3 and the ground G, and is removable so as not to get in the way when the opening (not shown) of the building is open. ..

When the middle pillar 4 is attached, the upper end of the middle pillar 4 is inserted into the shutter case 10, and then the lower end of the middle pillar 4 is dropped into the concave engagement hole 5ja. A drop rod 8 is provided along the inner side surface of the center pole 4, and the drop rod 8 can be fitted into and disengaged from an engagement hole 5ja provided in the floor surface G.
At this time, in order to prevent the drop rod 8 from coming off from the ground G which is the floor surface, the center pillar 4 is provided with the middle pillar fixing device 1 and is fitted and fixed in the engagement hole 5ja formed on the floor surface side. doing. The drop rod 8 has two right and left linear lower metal rods 5a and 5a provided along the inner surface of the center pillar 4 and a handle 5c formed by connecting the upper portions of the lower metal rods 5a and 5a. It has a length of 400 to 1000 mm.

Below the handle 5c, a guide hole 5da for slidably guiding the vertical movement of the lower protrusion 5b and a lock mechanism 5db for locking the upward movement of the lower protrusion 5b are provided. A first upper mechanism 5d is provided. Below the first upper mechanism 5d, there is provided a third adjusting mechanism 5h capable of adjusting the distance between the two left and right lower metal rods 5a, 5a of the lower protruding portion 5b.
Further, below this, there is provided a first lower mechanism 5e having a guide hole 5ea for slidably guiding the vertical movement of the lower protrusion 5b. Below the first lower mechanism 5e, there is provided a first adjusting mechanism 5g capable of adjusting the distance between the two left and right lower metal rods 5a, 5a.
Further, a fitting mechanism 5j having an engaging hole 5ja formed so that the lower protrusions 5b, 5b can be inserted is embedded in the floor surface G. One shutter surface 3 is vertically slidably guided by the left inner wall left column 14a and the middle column 4 when viewed from the inside of the shutter having the inner wall portion 14. The other shutter surface 3 is guided by the middle pillar 4 and the inner wall right pillar 14b. The shutter surface 3 can be lifted up manually or automatically, and a finger hole 15 is provided at the lower end of the shutter surface 3.

The middle pillar 4 is formed of a lightweight material so that a person can carry it by hand and attach it, and is easily dented or deformed. Therefore, the parallelism between the two left and right metal rods 5a, 5a may change due to aging, damage during handling, and the like, and there is a possibility that the intervals will inevitably vary. By the respective adjusting mechanisms, it is possible to correct the parallelism between the two left and right lower metal rods 5a and 5a and between the upper metal rods 6a and 6a.
For example, the third adjusting mechanism 5h is provided with threaded rods 5hb and 5hb welded to the left and right two metal rods 5a and 5a, respectively. A length adjusting handle 5ha functioning as a nut is screwed between the threaded rods 5hb and 5hb. The length adjusting handle 5ha is provided with forward and reverse screws at both ends thereof, and one of them is a reverse screw with the screws provided on the threaded rods 5hb and 5hb, The space between the two metal bars 5a, 5a can be expanded and contracted. By providing such an adjusting mechanism, it is possible to provide a shutter pillar supporting device with improved durability capable of coping with aging. The first adjusting mechanism 5g and the second adjusting mechanism 6g have the same structure.
In this way, the lock mechanism allows you to confirm the installation, insertion, and locking status of the center column fixing device securely, and the high handle position improves portability and operability, and helps prevent strong winds such as typhoons and tornadoes. Also, it is possible to protect the shutter from damage and deformation from external pressure such as riot and destruction by thieves. Further, since the adjusting mechanism is provided, it is possible to provide a middle column fixing device having improved durability capable of coping with secular changes such as deformation.

<Second Embodiment>
Next, a second embodiment of the present invention will be described in detail with reference to the drawings.
The difference between the second embodiment and the first embodiment is that a link plate is used for the relay mechanism in the first embodiment, but a spring and a stopper are provided in the second embodiment. is there.
The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.
As shown in FIG. 4C, in the relay mechanism 17, stoppers 17b and 17b are fixed to the upper ends of the lower metal rods 5a and 5a of the lower fixing mechanism 5, and the upper metal rod 6a of the upper fixing mechanism 6 is fixed. Stoppers 17b and 17b are fixed to the lower end of 6a, the coil spring 17a is inserted through the metal rod 6a, and the stoppers 17b on both the upper and lower sides prevent movement of the protrusions 5b and 6b. Is always biased against.
As a result, in the relay mechanism 17, the lower protrusion 5b provided in the lower fixing mechanism 5 and the upper protrusion 6b provided in the upper fixing mechanism 6 are always urged in the direction in which the center pillar 4 is fixed. However, when the handle 5c is moved in the pulling-up direction, the lower protrusion 5b and the upper protrusion 6b are both retracted into the center column fixing device 1, so that the center column 4 can be removed.
When the handle 5c moves in the pushing direction, the lower metal rod 5a descends and at the same time the upper metal rod 6a rises. At this time, the lower protrusion 5b fits into the engagement hole 5ja, and at the same time, the upper protrusion 6b fits into the engagement hole 6ja.
As shown in FIGS. 5 and 6, when the lower protrusions 5b, 5b and the upper protrusions 6b, 6b are fitted into the upper and lower engagement holes 5ja, 6ja, the manual slide type lock mechanism 5db is locked. As a result, the upper and lower ends of the center pillar 4 are firmly fixed to the shutter frame (not shown), and the lower protrusion 5b and the upper protrusion 6b move up and down in the fitting mechanism embedded in the shutter frame. It is not engaged and is not easily disengaged because it is locked by the vertical movement.
Conversely, when the handle 5c is pulled up against the force of the spring 17a, the lower metal rod 5a rises and at the same time the upper metal rod 6a descends. At this time, the lower protrusion 5b is removed from the engagement hole 5ja, and at the same time the upper protrusion 6b is removed from the engagement hole 6ja, so that the center pillar 4 can be easily removed. The handle 5c provided can be stably moved to a predetermined place.

Although the preferred embodiments have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention. For example, although it has been described that the lower adjusting mechanism is provided below the lower mechanism portion and the upper adjusting mechanism is provided above the upper mechanism portion, it may be above or below depending on the space. A larger number of adjusting mechanisms may be provided, and the number of adjusting mechanisms is not limited to this and can be set as appropriate. Further, the numbers of the upper reinforcing portion and the lower reinforcing portion for movably reinforcing the upper metal rod and the lower metal rod may be set by increasing or decreasing as appropriate.

1 Middle pillar fixing device 2 Slat 3 Shutter surface 4 Middle pillar 4a Inner surface (indoor side)
5 Lower fixing mechanism 5a Lower metal rod 5aa Upper part of lower metal rod 5ab Upper end of lower metal rod 5aba Locking pin 5b Lower protrusion 5c Handle 5d First upper mechanism 5da Guide hole 5db Lock mechanism 5db Lock hole 5db Lock pin 5dbc Lock Knob 5dbd Lock slide 5e First lower mechanism 5ea Guide hole 5f Lower reinforcing part 5g First adjusting mechanism 5h Third adjusting mechanism 5ha Length adjusting handle 5hb Threaded rod 5j Fitting mechanism 5ja Locking hole 6 Upper fixing mechanism 6a Upper metal rod 6ab Lower end of upper metal rod 6aba Locking pin 6b Upper protrusion 6e Second upper mechanism 6ea Guide hole 6f Upper reinforcement 6g Second adjusting mechanism 6j Fitting mechanism 6ja Locking hole 7, 17 Relay mechanism 7a First link plate 7aa Locking hole 7b Second link plate 7ba Locking hole 7c Central axis 7d Substrate 7e, 17e Guide hole 7f Relay mechanism case 8 Dropping rod, W dropping 9 Pushing up rod 10 Shutter case 14 Inner wall portion 14a Inner wall left column 14b Inner wall right column 15 Finger hole 17a Spring 17b Stopper

Claims (4)

First left locking pin and the first right locking pin respectively provided at the upper end, the lower metal rods of the first full two left and right fitting the engagement hole formed on the lower side,
A second left locking pin and a second right locking pin are respectively provided at the lower ends, and two left and right upper metal bars that fit into the second engaging holes formed above,
The upper ends of the two left and right lower metal rods and the lower ends of the left and right upper metal rods are connected to each other, and the left and right upper metal rods are provided on the opposite side to the moving direction of the left and right lower metal rods. A middle pillar fixing device for fixing the middle pillar of the shutter device , which comprises a relay mechanism for moving the rod ,
The relay mechanism has a locking hole in which the first left locking pin is slidably engaged and a second right locking pin is slidably engaged in both ends, respectively. A first link plate provided with holes,
A locking hole into which the first right locking pin is slidably engaged and a locking hole into which the second left locking pin is slidably engaged are provided at both ends, respectively. And a second link plate,
A center column fixing device in which the first link plate and the second link plate are arranged so as to be rotatable around a common rotation axis at their respective central portions. The central pillar fixing device according to claim 1,
A handle formed by connecting the two left and right lower metal rods,
A center pillar fixing device further comprising: a lock mechanism that prevents the handle from moving upward. The center pillar fixing device according to claim 2,
A first adjusting mechanism for adjusting a distance between the two left and right lower metal rods;
The center pillar fixing device further comprising a second adjusting mechanism that adjusts a distance between the left and right upper metal rods. The middle pillar,
A central pillar fixing device for fixing the central pillar, and a shutter device comprising:
The middle pillar fixing device is provided with a first left locking pin and a first right locking pin at the upper end, respectively, and two left and right lower metal rods are fitted into the first engaging holes formed below. When,
A second left locking pin and a second right locking pin are respectively provided at the lower ends, and two left and right upper metal bars that fit into the second engaging holes formed above,
The upper ends of the left and right lower metal rods are connected to the lower ends of the left and right upper metal rods, and the left and right upper metal rods are opposite to the direction in which the left and right lower metal rods move. And a relay mechanism for moving the
The relay mechanism has a locking hole in which the first left locking pin is slidably engaged and a second right locking pin is slidably engaged in both ends, respectively. A first link plate provided with holes,
A locking hole into which the first right locking pin is slidably engaged and a locking hole into which the second left locking pin is slidably engaged are provided at both ends, respectively. And a second link plate,
A shutter device in which the first link plate and the second link plate are arranged so as to be rotatable about a common rotation axis at respective central portions .

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